qemu-e2k/hw/usb/hcd-uhci.c

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/*
* USB UHCI controller emulation
*
* Copyright (c) 2005 Fabrice Bellard
*
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
* Copyright (c) 2008 Max Krasnyansky
* Magor rewrite of the UHCI data structures parser and frame processor
* Support for fully async operation and multiple outstanding transactions
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "hw/hw.h"
#include "hw/usb.h"
#include "hw/usb/uhci-regs.h"
#include "hw/pci/pci.h"
#include "qemu/timer.h"
#include "qemu/iov.h"
#include "sysemu/dma.h"
#include "trace.h"
#include "qemu/main-loop.h"
#define FRAME_TIMER_FREQ 1000
#define FRAME_MAX_LOOPS 256
/* Must be large enough to handle 10 frame delay for initial isoc requests */
#define QH_VALID 32
#define MAX_FRAMES_PER_TICK (QH_VALID / 2)
#define NB_PORTS 2
enum {
TD_RESULT_STOP_FRAME = 10,
TD_RESULT_COMPLETE,
TD_RESULT_NEXT_QH,
TD_RESULT_ASYNC_START,
TD_RESULT_ASYNC_CONT,
};
typedef struct UHCIState UHCIState;
typedef struct UHCIAsync UHCIAsync;
typedef struct UHCIQueue UHCIQueue;
typedef struct UHCIInfo UHCIInfo;
typedef struct UHCIPCIDeviceClass UHCIPCIDeviceClass;
struct UHCIInfo {
const char *name;
uint16_t vendor_id;
uint16_t device_id;
uint8_t revision;
uint8_t irq_pin;
int (*initfn)(PCIDevice *dev);
bool unplug;
};
struct UHCIPCIDeviceClass {
PCIDeviceClass parent_class;
UHCIInfo info;
};
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
/*
* Pending async transaction.
* 'packet' must be the first field because completion
* handler does "(UHCIAsync *) pkt" cast.
*/
struct UHCIAsync {
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
USBPacket packet;
uint8_t static_buf[64]; /* 64 bytes is enough, except for isoc packets */
uint8_t *buf;
UHCIQueue *queue;
2010-12-14 18:19:47 +01:00
QTAILQ_ENTRY(UHCIAsync) next;
uint32_t td_addr;
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
uint8_t done;
};
struct UHCIQueue {
uint32_t qh_addr;
uint32_t token;
UHCIState *uhci;
USBEndpoint *ep;
QTAILQ_ENTRY(UHCIQueue) next;
QTAILQ_HEAD(asyncs_head, UHCIAsync) asyncs;
int8_t valid;
};
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
typedef struct UHCIPort {
USBPort port;
uint16_t ctrl;
} UHCIPort;
struct UHCIState {
PCIDevice dev;
MemoryRegion io_bar;
USBBus bus; /* Note unused when we're a companion controller */
uint16_t cmd; /* cmd register */
uint16_t status;
uint16_t intr; /* interrupt enable register */
uint16_t frnum; /* frame number */
uint32_t fl_base_addr; /* frame list base address */
uint8_t sof_timing;
uint8_t status2; /* bit 0 and 1 are used to generate UHCI_STS_USBINT */
audio streaming from usb devices I have streaming audio devices working within qemu-kvm. This is a port of the changes to qemu. Streaming audio generates a series of isochronous requests that are repetitive and time sensitive. The URBs need to be submitted in consecutive USB frames and responses need to be handled in a timely manner. Summary of the changes for isochronous requests: 1. The initial 'valid' value is increased to 32. It needs to be higher than its current value of 10 since the host adds a 10 frame delay to the scheduling of the first request; if valid is set to 10 the first isochronous request times out and qemu cancels it. 32 was chosen as a nice round number, and it is used in the path where a TD-async pairing already exists. 2. The token field in the TD is *not* unique for isochronous requests, so it is not a good choice for finding a matching async request. The buffer (where to write the guest data) is unique, so use that value instead. 3. TD's for isochronous request need to be completed in the async completion handler so that data is pushed to the guest as soon as it is available. The uhci code currently attempts to process complete isochronous TDs the next time the UHCI frame with the request is processed. The results in lost data since the async requests will have long since timed out based on the valid parameter. Increasing the valid value is not acceptable as it introduces a 1+ second delay in the data getting pushed to the guest. 4. The frame timer needs to be run on 1 msec intervals. Currently, the expire time for the processing the next frame is computed after the processing of each frame. This regularly causes the scheduling of frames to shift in time. When this happens the periodic scheduling of the requests is broken and the subsequent request is seen as a new request by the host resulting in a 10 msec delay (first isochronous request is scheduled for 10 frames from when the URB is submitted). [ For what's worth a small change is needed to the guest driver to have more outstanding URBs (at least 4 URBs with 5 packets per URB).] Signed-off-by: David Ahern <daahern@cisco.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-02-03 16:49:39 +01:00
int64_t expire_time;
QEMUTimer *frame_timer;
QEMUBH *bh;
uint32_t frame_bytes;
uint32_t frame_bandwidth;
bool completions_only;
UHCIPort ports[NB_PORTS];
/* Interrupts that should be raised at the end of the current frame. */
uint32_t pending_int_mask;
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
/* Active packets */
QTAILQ_HEAD(, UHCIQueue) queues;
uint8_t num_ports_vmstate;
/* Properties */
char *masterbus;
uint32_t firstport;
uint32_t maxframes;
};
typedef struct UHCI_TD {
uint32_t link;
uint32_t ctrl; /* see TD_CTRL_xxx */
uint32_t token;
uint32_t buffer;
} UHCI_TD;
typedef struct UHCI_QH {
uint32_t link;
uint32_t el_link;
} UHCI_QH;
static void uhci_async_cancel(UHCIAsync *async);
static void uhci_queue_fill(UHCIQueue *q, UHCI_TD *td);
static void uhci_resume(void *opaque);
static inline int32_t uhci_queue_token(UHCI_TD *td)
{
if ((td->token & (0xf << 15)) == 0) {
/* ctrl ep, cover ep and dev, not pid! */
return td->token & 0x7ff00;
} else {
/* covers ep, dev, pid -> identifies the endpoint */
return td->token & 0x7ffff;
}
}
static UHCIQueue *uhci_queue_new(UHCIState *s, uint32_t qh_addr, UHCI_TD *td,
USBEndpoint *ep)
{
UHCIQueue *queue;
queue = g_new0(UHCIQueue, 1);
queue->uhci = s;
queue->qh_addr = qh_addr;
queue->token = uhci_queue_token(td);
queue->ep = ep;
QTAILQ_INIT(&queue->asyncs);
QTAILQ_INSERT_HEAD(&s->queues, queue, next);
queue->valid = QH_VALID;
trace_usb_uhci_queue_add(queue->token);
return queue;
}
static void uhci_queue_free(UHCIQueue *queue, const char *reason)
{
UHCIState *s = queue->uhci;
UHCIAsync *async;
while (!QTAILQ_EMPTY(&queue->asyncs)) {
async = QTAILQ_FIRST(&queue->asyncs);
uhci_async_cancel(async);
}
usb_device_ep_stopped(queue->ep->dev, queue->ep);
trace_usb_uhci_queue_del(queue->token, reason);
QTAILQ_REMOVE(&s->queues, queue, next);
g_free(queue);
}
static UHCIQueue *uhci_queue_find(UHCIState *s, UHCI_TD *td)
{
uint32_t token = uhci_queue_token(td);
UHCIQueue *queue;
QTAILQ_FOREACH(queue, &s->queues, next) {
if (queue->token == token) {
return queue;
}
}
return NULL;
}
static bool uhci_queue_verify(UHCIQueue *queue, uint32_t qh_addr, UHCI_TD *td,
uint32_t td_addr, bool queuing)
{
UHCIAsync *first = QTAILQ_FIRST(&queue->asyncs);
uint32_t queue_token_addr = (queue->token >> 8) & 0x7f;
return queue->qh_addr == qh_addr &&
queue->token == uhci_queue_token(td) &&
queue_token_addr == queue->ep->dev->addr &&
(queuing || !(td->ctrl & TD_CTRL_ACTIVE) || first == NULL ||
first->td_addr == td_addr);
}
static UHCIAsync *uhci_async_alloc(UHCIQueue *queue, uint32_t td_addr)
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
{
UHCIAsync *async = g_new0(UHCIAsync, 1);
async->queue = queue;
async->td_addr = td_addr;
usb_packet_init(&async->packet);
trace_usb_uhci_packet_add(async->queue->token, async->td_addr);
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
return async;
}
static void uhci_async_free(UHCIAsync *async)
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
{
trace_usb_uhci_packet_del(async->queue->token, async->td_addr);
usb_packet_cleanup(&async->packet);
if (async->buf != async->static_buf) {
g_free(async->buf);
}
g_free(async);
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
}
static void uhci_async_link(UHCIAsync *async)
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
{
UHCIQueue *queue = async->queue;
QTAILQ_INSERT_TAIL(&queue->asyncs, async, next);
trace_usb_uhci_packet_link_async(async->queue->token, async->td_addr);
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
}
static void uhci_async_unlink(UHCIAsync *async)
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
{
UHCIQueue *queue = async->queue;
QTAILQ_REMOVE(&queue->asyncs, async, next);
trace_usb_uhci_packet_unlink_async(async->queue->token, async->td_addr);
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
}
static void uhci_async_cancel(UHCIAsync *async)
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
{
uhci_async_unlink(async);
trace_usb_uhci_packet_cancel(async->queue->token, async->td_addr,
async->done);
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
if (!async->done)
usb_cancel_packet(&async->packet);
uhci_async_free(async);
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
}
/*
* Mark all outstanding async packets as invalid.
* This is used for canceling them when TDs are removed by the HCD.
*/
static void uhci_async_validate_begin(UHCIState *s)
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
{
UHCIQueue *queue;
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
QTAILQ_FOREACH(queue, &s->queues, next) {
queue->valid--;
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
}
}
/*
* Cancel async packets that are no longer valid
*/
static void uhci_async_validate_end(UHCIState *s)
{
UHCIQueue *queue, *n;
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
QTAILQ_FOREACH_SAFE(queue, &s->queues, next, n) {
if (!queue->valid) {
uhci_queue_free(queue, "validate-end");
}
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
}
}
static void uhci_async_cancel_device(UHCIState *s, USBDevice *dev)
{
UHCIQueue *queue, *n;
QTAILQ_FOREACH_SAFE(queue, &s->queues, next, n) {
if (queue->ep->dev == dev) {
uhci_queue_free(queue, "cancel-device");
}
}
}
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
static void uhci_async_cancel_all(UHCIState *s)
{
UHCIQueue *queue, *nq;
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
QTAILQ_FOREACH_SAFE(queue, &s->queues, next, nq) {
uhci_queue_free(queue, "cancel-all");
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
}
}
static UHCIAsync *uhci_async_find_td(UHCIState *s, uint32_t td_addr)
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
{
UHCIQueue *queue;
2010-12-14 18:19:47 +01:00
UHCIAsync *async;
QTAILQ_FOREACH(queue, &s->queues, next) {
QTAILQ_FOREACH(async, &queue->asyncs, next) {
if (async->td_addr == td_addr) {
return async;
}
}
}
return NULL;
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
}
static void uhci_update_irq(UHCIState *s)
{
int level;
if (((s->status2 & 1) && (s->intr & (1 << 2))) ||
((s->status2 & 2) && (s->intr & (1 << 3))) ||
((s->status & UHCI_STS_USBERR) && (s->intr & (1 << 0))) ||
((s->status & UHCI_STS_RD) && (s->intr & (1 << 1))) ||
(s->status & UHCI_STS_HSERR) ||
(s->status & UHCI_STS_HCPERR)) {
level = 1;
} else {
level = 0;
}
pci_set_irq(&s->dev, level);
}
static void uhci_reset(void *opaque)
{
UHCIState *s = opaque;
uint8_t *pci_conf;
int i;
UHCIPort *port;
trace_usb_uhci_reset();
pci_conf = s->dev.config;
pci_conf[0x6a] = 0x01; /* usb clock */
pci_conf[0x6b] = 0x00;
s->cmd = 0;
s->status = 0;
s->status2 = 0;
s->intr = 0;
s->fl_base_addr = 0;
s->sof_timing = 64;
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
for(i = 0; i < NB_PORTS; i++) {
port = &s->ports[i];
port->ctrl = 0x0080;
if (port->port.dev && port->port.dev->attached) {
usb_port_reset(&port->port);
}
}
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
uhci_async_cancel_all(s);
qemu_bh_cancel(s->bh);
uhci_update_irq(s);
}
static const VMStateDescription vmstate_uhci_port = {
.name = "uhci port",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT16(ctrl, UHCIPort),
VMSTATE_END_OF_LIST()
}
};
static int uhci_post_load(void *opaque, int version_id)
{
UHCIState *s = opaque;
if (version_id < 2) {
s->expire_time = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
(get_ticks_per_sec() / FRAME_TIMER_FREQ);
}
return 0;
}
static const VMStateDescription vmstate_uhci = {
.name = "uhci",
.version_id = 3,
.minimum_version_id = 1,
.post_load = uhci_post_load,
.fields = (VMStateField[]) {
VMSTATE_PCI_DEVICE(dev, UHCIState),
VMSTATE_UINT8_EQUAL(num_ports_vmstate, UHCIState),
VMSTATE_STRUCT_ARRAY(ports, UHCIState, NB_PORTS, 1,
vmstate_uhci_port, UHCIPort),
VMSTATE_UINT16(cmd, UHCIState),
VMSTATE_UINT16(status, UHCIState),
VMSTATE_UINT16(intr, UHCIState),
VMSTATE_UINT16(frnum, UHCIState),
VMSTATE_UINT32(fl_base_addr, UHCIState),
VMSTATE_UINT8(sof_timing, UHCIState),
VMSTATE_UINT8(status2, UHCIState),
VMSTATE_TIMER_PTR(frame_timer, UHCIState),
VMSTATE_INT64_V(expire_time, UHCIState, 2),
VMSTATE_UINT32_V(pending_int_mask, UHCIState, 3),
VMSTATE_END_OF_LIST()
}
};
static void uhci_port_write(void *opaque, hwaddr addr,
uint64_t val, unsigned size)
{
UHCIState *s = opaque;
trace_usb_uhci_mmio_writew(addr, val);
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
switch(addr) {
case 0x00:
if ((val & UHCI_CMD_RS) && !(s->cmd & UHCI_CMD_RS)) {
/* start frame processing */
trace_usb_uhci_schedule_start();
s->expire_time = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
(get_ticks_per_sec() / FRAME_TIMER_FREQ);
timer_mod(s->frame_timer, s->expire_time);
s->status &= ~UHCI_STS_HCHALTED;
} else if (!(val & UHCI_CMD_RS)) {
s->status |= UHCI_STS_HCHALTED;
}
if (val & UHCI_CMD_GRESET) {
UHCIPort *port;
int i;
/* send reset on the USB bus */
for(i = 0; i < NB_PORTS; i++) {
port = &s->ports[i];
usb_device_reset(port->port.dev);
}
uhci_reset(s);
return;
}
if (val & UHCI_CMD_HCRESET) {
uhci_reset(s);
return;
}
s->cmd = val;
if (val & UHCI_CMD_EGSM) {
if ((s->ports[0].ctrl & UHCI_PORT_RD) ||
(s->ports[1].ctrl & UHCI_PORT_RD)) {
uhci_resume(s);
}
}
break;
case 0x02:
s->status &= ~val;
/* XXX: the chip spec is not coherent, so we add a hidden
register to distinguish between IOC and SPD */
if (val & UHCI_STS_USBINT)
s->status2 = 0;
uhci_update_irq(s);
break;
case 0x04:
s->intr = val;
uhci_update_irq(s);
break;
case 0x06:
if (s->status & UHCI_STS_HCHALTED)
s->frnum = val & 0x7ff;
break;
case 0x08:
s->fl_base_addr &= 0xffff0000;
s->fl_base_addr |= val & ~0xfff;
break;
case 0x0a:
s->fl_base_addr &= 0x0000ffff;
s->fl_base_addr |= (val << 16);
break;
case 0x0c:
s->sof_timing = val & 0xff;
break;
case 0x10 ... 0x1f:
{
UHCIPort *port;
USBDevice *dev;
int n;
n = (addr >> 1) & 7;
if (n >= NB_PORTS)
return;
port = &s->ports[n];
dev = port->port.dev;
if (dev && dev->attached) {
/* port reset */
if ( (val & UHCI_PORT_RESET) &&
!(port->ctrl & UHCI_PORT_RESET) ) {
usb_device_reset(dev);
}
}
port->ctrl &= UHCI_PORT_READ_ONLY;
/* enabled may only be set if a device is connected */
if (!(port->ctrl & UHCI_PORT_CCS)) {
val &= ~UHCI_PORT_EN;
}
port->ctrl |= (val & ~UHCI_PORT_READ_ONLY);
/* some bits are reset when a '1' is written to them */
port->ctrl &= ~(val & UHCI_PORT_WRITE_CLEAR);
}
break;
}
}
static uint64_t uhci_port_read(void *opaque, hwaddr addr, unsigned size)
{
UHCIState *s = opaque;
uint32_t val;
switch(addr) {
case 0x00:
val = s->cmd;
break;
case 0x02:
val = s->status;
break;
case 0x04:
val = s->intr;
break;
case 0x06:
val = s->frnum;
break;
case 0x08:
val = s->fl_base_addr & 0xffff;
break;
case 0x0a:
val = (s->fl_base_addr >> 16) & 0xffff;
break;
case 0x0c:
val = s->sof_timing;
break;
case 0x10 ... 0x1f:
{
UHCIPort *port;
int n;
n = (addr >> 1) & 7;
if (n >= NB_PORTS)
goto read_default;
port = &s->ports[n];
val = port->ctrl;
}
break;
default:
read_default:
val = 0xff7f; /* disabled port */
break;
}
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
trace_usb_uhci_mmio_readw(addr, val);
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
return val;
}
/* signal resume if controller suspended */
static void uhci_resume (void *opaque)
{
UHCIState *s = (UHCIState *)opaque;
if (!s)
return;
if (s->cmd & UHCI_CMD_EGSM) {
s->cmd |= UHCI_CMD_FGR;
s->status |= UHCI_STS_RD;
uhci_update_irq(s);
}
}
static void uhci_attach(USBPort *port1)
{
UHCIState *s = port1->opaque;
UHCIPort *port = &s->ports[port1->index];
/* set connect status */
port->ctrl |= UHCI_PORT_CCS | UHCI_PORT_CSC;
/* update speed */
if (port->port.dev->speed == USB_SPEED_LOW) {
port->ctrl |= UHCI_PORT_LSDA;
} else {
port->ctrl &= ~UHCI_PORT_LSDA;
}
uhci_resume(s);
}
static void uhci_detach(USBPort *port1)
{
UHCIState *s = port1->opaque;
UHCIPort *port = &s->ports[port1->index];
uhci_async_cancel_device(s, port1->dev);
/* set connect status */
if (port->ctrl & UHCI_PORT_CCS) {
port->ctrl &= ~UHCI_PORT_CCS;
port->ctrl |= UHCI_PORT_CSC;
}
/* disable port */
if (port->ctrl & UHCI_PORT_EN) {
port->ctrl &= ~UHCI_PORT_EN;
port->ctrl |= UHCI_PORT_ENC;
}
uhci_resume(s);
}
static void uhci_child_detach(USBPort *port1, USBDevice *child)
{
UHCIState *s = port1->opaque;
uhci_async_cancel_device(s, child);
}
static void uhci_wakeup(USBPort *port1)
{
UHCIState *s = port1->opaque;
UHCIPort *port = &s->ports[port1->index];
if (port->ctrl & UHCI_PORT_SUSPEND && !(port->ctrl & UHCI_PORT_RD)) {
port->ctrl |= UHCI_PORT_RD;
uhci_resume(s);
}
}
static USBDevice *uhci_find_device(UHCIState *s, uint8_t addr)
{
USBDevice *dev;
int i;
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
for (i = 0; i < NB_PORTS; i++) {
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
UHCIPort *port = &s->ports[i];
if (!(port->ctrl & UHCI_PORT_EN)) {
continue;
}
dev = usb_find_device(&port->port, addr);
if (dev != NULL) {
return dev;
}
}
return NULL;
}
static void uhci_read_td(UHCIState *s, UHCI_TD *td, uint32_t link)
{
pci_dma_read(&s->dev, link & ~0xf, td, sizeof(*td));
le32_to_cpus(&td->link);
le32_to_cpus(&td->ctrl);
le32_to_cpus(&td->token);
le32_to_cpus(&td->buffer);
}
static int uhci_handle_td_error(UHCIState *s, UHCI_TD *td, uint32_t td_addr,
int status, uint32_t *int_mask)
{
uint32_t queue_token = uhci_queue_token(td);
int ret;
switch (status) {
case USB_RET_NAK:
td->ctrl |= TD_CTRL_NAK;
return TD_RESULT_NEXT_QH;
case USB_RET_STALL:
td->ctrl |= TD_CTRL_STALL;
trace_usb_uhci_packet_complete_stall(queue_token, td_addr);
ret = TD_RESULT_NEXT_QH;
break;
case USB_RET_BABBLE:
td->ctrl |= TD_CTRL_BABBLE | TD_CTRL_STALL;
/* frame interrupted */
trace_usb_uhci_packet_complete_babble(queue_token, td_addr);
ret = TD_RESULT_STOP_FRAME;
break;
case USB_RET_IOERROR:
case USB_RET_NODEV:
default:
td->ctrl |= TD_CTRL_TIMEOUT;
td->ctrl &= ~(3 << TD_CTRL_ERROR_SHIFT);
trace_usb_uhci_packet_complete_error(queue_token, td_addr);
ret = TD_RESULT_NEXT_QH;
break;
}
td->ctrl &= ~TD_CTRL_ACTIVE;
s->status |= UHCI_STS_USBERR;
if (td->ctrl & TD_CTRL_IOC) {
*int_mask |= 0x01;
}
uhci_update_irq(s);
return ret;
}
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
static int uhci_complete_td(UHCIState *s, UHCI_TD *td, UHCIAsync *async, uint32_t *int_mask)
{
int len = 0, max_len;
uint8_t pid;
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
max_len = ((td->token >> 21) + 1) & 0x7ff;
pid = td->token & 0xff;
if (td->ctrl & TD_CTRL_IOS)
td->ctrl &= ~TD_CTRL_ACTIVE;
if (async->packet.status != USB_RET_SUCCESS) {
return uhci_handle_td_error(s, td, async->td_addr,
async->packet.status, int_mask);
}
len = async->packet.actual_length;
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
td->ctrl = (td->ctrl & ~0x7ff) | ((len - 1) & 0x7ff);
/* The NAK bit may have been set by a previous frame, so clear it
here. The docs are somewhat unclear, but win2k relies on this
behavior. */
td->ctrl &= ~(TD_CTRL_ACTIVE | TD_CTRL_NAK);
if (td->ctrl & TD_CTRL_IOC)
*int_mask |= 0x01;
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
if (pid == USB_TOKEN_IN) {
pci_dma_write(&s->dev, td->buffer, async->buf, len);
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
if ((td->ctrl & TD_CTRL_SPD) && len < max_len) {
*int_mask |= 0x02;
/* short packet: do not update QH */
trace_usb_uhci_packet_complete_shortxfer(async->queue->token,
async->td_addr);
return TD_RESULT_NEXT_QH;
}
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
}
/* success */
trace_usb_uhci_packet_complete_success(async->queue->token,
async->td_addr);
return TD_RESULT_COMPLETE;
}
static int uhci_handle_td(UHCIState *s, UHCIQueue *q, uint32_t qh_addr,
UHCI_TD *td, uint32_t td_addr, uint32_t *int_mask)
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
{
int ret, max_len;
bool spd;
bool queuing = (q != NULL);
uint8_t pid = td->token & 0xff;
UHCIAsync *async = uhci_async_find_td(s, td_addr);
if (async) {
if (uhci_queue_verify(async->queue, qh_addr, td, td_addr, queuing)) {
assert(q == NULL || q == async->queue);
q = async->queue;
} else {
uhci_queue_free(async->queue, "guest re-used pending td");
async = NULL;
}
}
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
if (q == NULL) {
q = uhci_queue_find(s, td);
if (q && !uhci_queue_verify(q, qh_addr, td, td_addr, queuing)) {
uhci_queue_free(q, "guest re-used qh");
q = NULL;
}
}
if (q) {
q->valid = QH_VALID;
}
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
/* Is active ? */
if (!(td->ctrl & TD_CTRL_ACTIVE)) {
if (async) {
/* Guest marked a pending td non-active, cancel the queue */
uhci_queue_free(async->queue, "pending td non-active");
}
/*
* ehci11d spec page 22: "Even if the Active bit in the TD is already
* cleared when the TD is fetched ... an IOC interrupt is generated"
*/
if (td->ctrl & TD_CTRL_IOC) {
*int_mask |= 0x01;
}
return TD_RESULT_NEXT_QH;
}
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
if (async) {
if (queuing) {
/* we are busy filling the queue, we are not prepared
to consume completed packages then, just leave them
in async state */
return TD_RESULT_ASYNC_CONT;
}
if (!async->done) {
UHCI_TD last_td;
UHCIAsync *last = QTAILQ_LAST(&async->queue->asyncs, asyncs_head);
/*
* While we are waiting for the current td to complete, the guest
* may have added more tds to the queue. Note we re-read the td
* rather then caching it, as we want to see guest made changes!
*/
uhci_read_td(s, &last_td, last->td_addr);
uhci_queue_fill(async->queue, &last_td);
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
return TD_RESULT_ASYNC_CONT;
}
uhci_async_unlink(async);
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
goto done;
}
if (s->completions_only) {
return TD_RESULT_ASYNC_CONT;
}
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
/* Allocate new packet */
if (q == NULL) {
USBDevice *dev = uhci_find_device(s, (td->token >> 8) & 0x7f);
USBEndpoint *ep = usb_ep_get(dev, pid, (td->token >> 15) & 0xf);
if (ep == NULL) {
return uhci_handle_td_error(s, td, td_addr, USB_RET_NODEV,
int_mask);
}
q = uhci_queue_new(s, qh_addr, td, ep);
}
async = uhci_async_alloc(q, td_addr);
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
max_len = ((td->token >> 21) + 1) & 0x7ff;
spd = (pid == USB_TOKEN_IN && (td->ctrl & TD_CTRL_SPD) != 0);
usb_packet_setup(&async->packet, pid, q->ep, 0, td_addr, spd,
(td->ctrl & TD_CTRL_IOC) != 0);
if (max_len <= sizeof(async->static_buf)) {
async->buf = async->static_buf;
} else {
async->buf = g_malloc(max_len);
}
usb_packet_addbuf(&async->packet, async->buf, max_len);
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
switch(pid) {
case USB_TOKEN_OUT:
case USB_TOKEN_SETUP:
pci_dma_read(&s->dev, td->buffer, async->buf, max_len);
usb_handle_packet(q->ep->dev, &async->packet);
if (async->packet.status == USB_RET_SUCCESS) {
async->packet.actual_length = max_len;
}
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
break;
case USB_TOKEN_IN:
usb_handle_packet(q->ep->dev, &async->packet);
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
break;
default:
/* invalid pid : frame interrupted */
uhci_async_free(async);
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
s->status |= UHCI_STS_HCPERR;
uhci_update_irq(s);
return TD_RESULT_STOP_FRAME;
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
}
if (async->packet.status == USB_RET_ASYNC) {
uhci_async_link(async);
if (!queuing) {
uhci_queue_fill(q, td);
}
return TD_RESULT_ASYNC_START;
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
}
done:
ret = uhci_complete_td(s, td, async, int_mask);
uhci_async_free(async);
return ret;
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
}
static void uhci_async_complete(USBPort *port, USBPacket *packet)
{
UHCIAsync *async = container_of(packet, UHCIAsync, packet);
UHCIState *s = async->queue->uhci;
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
if (packet->status == USB_RET_REMOVE_FROM_QUEUE) {
uhci_async_cancel(async);
return;
}
async->done = 1;
/* Force processing of this packet *now*, needed for migration */
s->completions_only = true;
qemu_bh_schedule(s->bh);
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
}
static int is_valid(uint32_t link)
{
return (link & 1) == 0;
}
static int is_qh(uint32_t link)
{
return (link & 2) != 0;
}
static int depth_first(uint32_t link)
{
return (link & 4) != 0;
}
/* QH DB used for detecting QH loops */
#define UHCI_MAX_QUEUES 128
typedef struct {
uint32_t addr[UHCI_MAX_QUEUES];
int count;
} QhDb;
static void qhdb_reset(QhDb *db)
{
db->count = 0;
}
/* Add QH to DB. Returns 1 if already present or DB is full. */
static int qhdb_insert(QhDb *db, uint32_t addr)
{
int i;
for (i = 0; i < db->count; i++)
if (db->addr[i] == addr)
return 1;
if (db->count >= UHCI_MAX_QUEUES)
return 1;
db->addr[db->count++] = addr;
return 0;
}
static void uhci_queue_fill(UHCIQueue *q, UHCI_TD *td)
{
uint32_t int_mask = 0;
uint32_t plink = td->link;
UHCI_TD ptd;
int ret;
while (is_valid(plink)) {
uhci_read_td(q->uhci, &ptd, plink);
if (!(ptd.ctrl & TD_CTRL_ACTIVE)) {
break;
}
if (uhci_queue_token(&ptd) != q->token) {
break;
}
trace_usb_uhci_td_queue(plink & ~0xf, ptd.ctrl, ptd.token);
ret = uhci_handle_td(q->uhci, q, q->qh_addr, &ptd, plink, &int_mask);
if (ret == TD_RESULT_ASYNC_CONT) {
break;
}
assert(ret == TD_RESULT_ASYNC_START);
assert(int_mask == 0);
plink = ptd.link;
}
usb_device_flush_ep_queue(q->ep->dev, q->ep);
}
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
static void uhci_process_frame(UHCIState *s)
{
uint32_t frame_addr, link, old_td_ctrl, val, int_mask;
uint32_t curr_qh, td_count = 0;
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
int cnt, ret;
UHCI_TD td;
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
UHCI_QH qh;
QhDb qhdb;
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
frame_addr = s->fl_base_addr + ((s->frnum & 0x3ff) << 2);
pci_dma_read(&s->dev, frame_addr, &link, 4);
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
le32_to_cpus(&link);
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
int_mask = 0;
curr_qh = 0;
qhdb_reset(&qhdb);
for (cnt = FRAME_MAX_LOOPS; is_valid(link) && cnt; cnt--) {
if (!s->completions_only && s->frame_bytes >= s->frame_bandwidth) {
/* We've reached the usb 1.1 bandwidth, which is
1280 bytes/frame, stop processing */
trace_usb_uhci_frame_stop_bandwidth();
break;
}
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
if (is_qh(link)) {
/* QH */
trace_usb_uhci_qh_load(link & ~0xf);
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
if (qhdb_insert(&qhdb, link)) {
/*
* We're going in circles. Which is not a bug because
* HCD is allowed to do that as part of the BW management.
*
* Stop processing here if no transaction has been done
* since we've been here last time.
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
*/
if (td_count == 0) {
trace_usb_uhci_frame_loop_stop_idle();
break;
} else {
trace_usb_uhci_frame_loop_continue();
td_count = 0;
qhdb_reset(&qhdb);
qhdb_insert(&qhdb, link);
}
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
}
pci_dma_read(&s->dev, link & ~0xf, &qh, sizeof(qh));
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
le32_to_cpus(&qh.link);
le32_to_cpus(&qh.el_link);
if (!is_valid(qh.el_link)) {
/* QH w/o elements */
curr_qh = 0;
link = qh.link;
} else {
/* QH with elements */
curr_qh = link;
link = qh.el_link;
}
continue;
}
/* TD */
uhci_read_td(s, &td, link);
trace_usb_uhci_td_load(curr_qh & ~0xf, link & ~0xf, td.ctrl, td.token);
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
old_td_ctrl = td.ctrl;
ret = uhci_handle_td(s, NULL, curr_qh, &td, link, &int_mask);
if (old_td_ctrl != td.ctrl) {
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
/* update the status bits of the TD */
val = cpu_to_le32(td.ctrl);
pci_dma_write(&s->dev, (link & ~0xf) + 4, &val, sizeof(val));
}
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
switch (ret) {
case TD_RESULT_STOP_FRAME: /* interrupted frame */
goto out;
case TD_RESULT_NEXT_QH:
case TD_RESULT_ASYNC_CONT:
trace_usb_uhci_td_nextqh(curr_qh & ~0xf, link & ~0xf);
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
link = curr_qh ? qh.link : td.link;
continue;
case TD_RESULT_ASYNC_START:
trace_usb_uhci_td_async(curr_qh & ~0xf, link & ~0xf);
link = curr_qh ? qh.link : td.link;
continue;
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
case TD_RESULT_COMPLETE:
trace_usb_uhci_td_complete(curr_qh & ~0xf, link & ~0xf);
link = td.link;
td_count++;
s->frame_bytes += (td.ctrl & 0x7ff) + 1;
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
if (curr_qh) {
/* update QH element link */
qh.el_link = link;
val = cpu_to_le32(qh.el_link);
pci_dma_write(&s->dev, (curr_qh & ~0xf) + 4, &val, sizeof(val));
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
if (!depth_first(link)) {
/* done with this QH */
curr_qh = 0;
link = qh.link;
}
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
}
break;
default:
assert(!"unknown return code");
}
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
/* go to the next entry */
}
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
out:
audio streaming from usb devices I have streaming audio devices working within qemu-kvm. This is a port of the changes to qemu. Streaming audio generates a series of isochronous requests that are repetitive and time sensitive. The URBs need to be submitted in consecutive USB frames and responses need to be handled in a timely manner. Summary of the changes for isochronous requests: 1. The initial 'valid' value is increased to 32. It needs to be higher than its current value of 10 since the host adds a 10 frame delay to the scheduling of the first request; if valid is set to 10 the first isochronous request times out and qemu cancels it. 32 was chosen as a nice round number, and it is used in the path where a TD-async pairing already exists. 2. The token field in the TD is *not* unique for isochronous requests, so it is not a good choice for finding a matching async request. The buffer (where to write the guest data) is unique, so use that value instead. 3. TD's for isochronous request need to be completed in the async completion handler so that data is pushed to the guest as soon as it is available. The uhci code currently attempts to process complete isochronous TDs the next time the UHCI frame with the request is processed. The results in lost data since the async requests will have long since timed out based on the valid parameter. Increasing the valid value is not acceptable as it introduces a 1+ second delay in the data getting pushed to the guest. 4. The frame timer needs to be run on 1 msec intervals. Currently, the expire time for the processing the next frame is computed after the processing of each frame. This regularly causes the scheduling of frames to shift in time. When this happens the periodic scheduling of the requests is broken and the subsequent request is seen as a new request by the host resulting in a 10 msec delay (first isochronous request is scheduled for 10 frames from when the URB is submitted). [ For what's worth a small change is needed to the guest driver to have more outstanding URBs (at least 4 URBs with 5 packets per URB).] Signed-off-by: David Ahern <daahern@cisco.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-02-03 16:49:39 +01:00
s->pending_int_mask |= int_mask;
}
static void uhci_bh(void *opaque)
{
UHCIState *s = opaque;
uhci_process_frame(s);
}
static void uhci_frame_timer(void *opaque)
{
UHCIState *s = opaque;
uint64_t t_now, t_last_run;
int i, frames;
const uint64_t frame_t = get_ticks_per_sec() / FRAME_TIMER_FREQ;
audio streaming from usb devices I have streaming audio devices working within qemu-kvm. This is a port of the changes to qemu. Streaming audio generates a series of isochronous requests that are repetitive and time sensitive. The URBs need to be submitted in consecutive USB frames and responses need to be handled in a timely manner. Summary of the changes for isochronous requests: 1. The initial 'valid' value is increased to 32. It needs to be higher than its current value of 10 since the host adds a 10 frame delay to the scheduling of the first request; if valid is set to 10 the first isochronous request times out and qemu cancels it. 32 was chosen as a nice round number, and it is used in the path where a TD-async pairing already exists. 2. The token field in the TD is *not* unique for isochronous requests, so it is not a good choice for finding a matching async request. The buffer (where to write the guest data) is unique, so use that value instead. 3. TD's for isochronous request need to be completed in the async completion handler so that data is pushed to the guest as soon as it is available. The uhci code currently attempts to process complete isochronous TDs the next time the UHCI frame with the request is processed. The results in lost data since the async requests will have long since timed out based on the valid parameter. Increasing the valid value is not acceptable as it introduces a 1+ second delay in the data getting pushed to the guest. 4. The frame timer needs to be run on 1 msec intervals. Currently, the expire time for the processing the next frame is computed after the processing of each frame. This regularly causes the scheduling of frames to shift in time. When this happens the periodic scheduling of the requests is broken and the subsequent request is seen as a new request by the host resulting in a 10 msec delay (first isochronous request is scheduled for 10 frames from when the URB is submitted). [ For what's worth a small change is needed to the guest driver to have more outstanding URBs (at least 4 URBs with 5 packets per URB).] Signed-off-by: David Ahern <daahern@cisco.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-02-03 16:49:39 +01:00
s->completions_only = false;
qemu_bh_cancel(s->bh);
if (!(s->cmd & UHCI_CMD_RS)) {
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
/* Full stop */
trace_usb_uhci_schedule_stop();
timer_del(s->frame_timer);
uhci_async_cancel_all(s);
/* set hchalted bit in status - UHCI11D 2.1.2 */
s->status |= UHCI_STS_HCHALTED;
return;
}
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
/* We still store expire_time in our state, for migration */
t_last_run = s->expire_time - frame_t;
t_now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions (Max Krasnyansky) This is esentially a re-write of the QEMU UHCI layer. My initial goal was to support fully async operation with multiple outstanding async transactions. Along the way I realized that I can greatly simplify and cleanup the overall logic. There was a lot of duplicate and confusing code in the UHCI data structure parsing and other places. We were actually violating UHCI spec in handling async ISOC transaction (host controller is not supposed to write into the frame pointer). The reason I wanted to support fully async operation is because current synchronous version is unusable with most devices exported from host (via usb-linux.c). Transactions take a long time and the whole VM becomes slow as hell. Current async support is very rudimentory and for the most part non-functional. Single transaction at a time is simply not enough. I have a device for which XP driver submits both IN and OUT packets at the same time. IN packet always times out unless OUT packet makes it to the device. Hence we must be able to process both in order for that device to work. The new code is backwards compatible and was first tested agains original synchronous usb-linux.c and builtin usb devices like tablet which is also synchronous. Rewrite of the usb-linux.c is coming up next. Async support was tested against various XP versions (ie XP, SP2, SP3) and a bunch of different USB devices: serial port controllers, mice, keyboard, JTAG dongles (from Xilinx and Altera). ISOC support was only lighly tested and needs more work. It's not any worse than current code though. UHCI parser changes are probably somewhat hard to review without the understanding of the UHCI spec. The async design should be fairly easy to follow. Basically we have a list of async objects for each pending transfer. Async objects are tagged with the original TD (transfer descriptor) address and token. We now support unlimited number of outstanding isoc and one outstanding bulk/intr/ctrl transfer per QH (queue head). UHCI spec does not have a clear protocol for the cancelation of the trasfer requests. Driver can yank out TDs on any frame boundary. In oder to handle that I added somewhat fancy TD validation logic logic to avoid unnecessary cancelations. Signed-off-by: Max Krasnyansky <maxk@kernel.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21 21:30:31 +02:00
/* Process up to MAX_FRAMES_PER_TICK frames */
frames = (t_now - t_last_run) / frame_t;
if (frames > s->maxframes) {
int skipped = frames - s->maxframes;
s->expire_time += skipped * frame_t;
s->frnum = (s->frnum + skipped) & 0x7ff;
frames -= skipped;
}
if (frames > MAX_FRAMES_PER_TICK) {
frames = MAX_FRAMES_PER_TICK;
}
for (i = 0; i < frames; i++) {
s->frame_bytes = 0;
trace_usb_uhci_frame_start(s->frnum);
uhci_async_validate_begin(s);
uhci_process_frame(s);
uhci_async_validate_end(s);
/* The spec says frnum is the frame currently being processed, and
* the guest must look at frnum - 1 on interrupt, so inc frnum now */
s->frnum = (s->frnum + 1) & 0x7ff;
s->expire_time += frame_t;
}
/* Complete the previous frame(s) */
if (s->pending_int_mask) {
s->status2 |= s->pending_int_mask;
s->status |= UHCI_STS_USBINT;
uhci_update_irq(s);
}
s->pending_int_mask = 0;
timer_mod(s->frame_timer, t_now + frame_t);
}
static const MemoryRegionOps uhci_ioport_ops = {
.read = uhci_port_read,
.write = uhci_port_write,
.valid.min_access_size = 1,
.valid.max_access_size = 4,
.impl.min_access_size = 2,
.impl.max_access_size = 2,
.endianness = DEVICE_LITTLE_ENDIAN,
};
static USBPortOps uhci_port_ops = {
.attach = uhci_attach,
.detach = uhci_detach,
.child_detach = uhci_child_detach,
.wakeup = uhci_wakeup,
.complete = uhci_async_complete,
};
static USBBusOps uhci_bus_ops = {
};
static int usb_uhci_common_initfn(PCIDevice *dev)
{
PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(dev);
UHCIPCIDeviceClass *u = container_of(pc, UHCIPCIDeviceClass, parent_class);
UHCIState *s = DO_UPCAST(UHCIState, dev, dev);
uint8_t *pci_conf = s->dev.config;
int i;
pci_conf[PCI_CLASS_PROG] = 0x00;
/* TODO: reset value should be 0. */
pci_conf[USB_SBRN] = USB_RELEASE_1; // release number
pci_config_set_interrupt_pin(pci_conf, u->info.irq_pin + 1);
if (s->masterbus) {
USBPort *ports[NB_PORTS];
for(i = 0; i < NB_PORTS; i++) {
ports[i] = &s->ports[i].port;
}
if (usb_register_companion(s->masterbus, ports, NB_PORTS,
s->firstport, s, &uhci_port_ops,
USB_SPEED_MASK_LOW | USB_SPEED_MASK_FULL) != 0) {
return -1;
}
} else {
usb_bus_new(&s->bus, sizeof(s->bus), &uhci_bus_ops, DEVICE(dev));
for (i = 0; i < NB_PORTS; i++) {
usb_register_port(&s->bus, &s->ports[i].port, s, i, &uhci_port_ops,
USB_SPEED_MASK_LOW | USB_SPEED_MASK_FULL);
}
}
s->bh = qemu_bh_new(uhci_bh, s);
s->frame_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, uhci_frame_timer, s);
s->num_ports_vmstate = NB_PORTS;
QTAILQ_INIT(&s->queues);
qemu_register_reset(uhci_reset, s);
memory_region_init_io(&s->io_bar, OBJECT(s), &uhci_ioport_ops, s,
"uhci", 0x20);
/* Use region 4 for consistency with real hardware. BSD guests seem
to rely on this. */
pci_register_bar(&s->dev, 4, PCI_BASE_ADDRESS_SPACE_IO, &s->io_bar);
return 0;
}
static int usb_uhci_vt82c686b_initfn(PCIDevice *dev)
{
UHCIState *s = DO_UPCAST(UHCIState, dev, dev);
uint8_t *pci_conf = s->dev.config;
/* USB misc control 1/2 */
pci_set_long(pci_conf + 0x40,0x00001000);
/* PM capability */
pci_set_long(pci_conf + 0x80,0x00020001);
/* USB legacy support */
pci_set_long(pci_conf + 0xc0,0x00002000);
return usb_uhci_common_initfn(dev);
}
static void usb_uhci_exit(PCIDevice *dev)
{
UHCIState *s = DO_UPCAST(UHCIState, dev, dev);
trace_usb_uhci_exit();
if (s->frame_timer) {
timer_del(s->frame_timer);
timer_free(s->frame_timer);
s->frame_timer = NULL;
}
if (s->bh) {
qemu_bh_delete(s->bh);
}
uhci_async_cancel_all(s);
if (!s->masterbus) {
usb_bus_release(&s->bus);
}
}
static Property uhci_properties_companion[] = {
DEFINE_PROP_STRING("masterbus", UHCIState, masterbus),
DEFINE_PROP_UINT32("firstport", UHCIState, firstport, 0),
DEFINE_PROP_UINT32("bandwidth", UHCIState, frame_bandwidth, 1280),
DEFINE_PROP_UINT32("maxframes", UHCIState, maxframes, 128),
DEFINE_PROP_END_OF_LIST(),
};
static Property uhci_properties_standalone[] = {
DEFINE_PROP_UINT32("bandwidth", UHCIState, frame_bandwidth, 1280),
DEFINE_PROP_UINT32("maxframes", UHCIState, maxframes, 128),
DEFINE_PROP_END_OF_LIST(),
};
static void uhci_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
UHCIPCIDeviceClass *u = container_of(k, UHCIPCIDeviceClass, parent_class);
UHCIInfo *info = data;
k->init = info->initfn ? info->initfn : usb_uhci_common_initfn;
k->exit = info->unplug ? usb_uhci_exit : NULL;
k->vendor_id = info->vendor_id;
k->device_id = info->device_id;
k->revision = info->revision;
k->class_id = PCI_CLASS_SERIAL_USB;
dc->vmsd = &vmstate_uhci;
if (!info->unplug) {
/* uhci controllers in companion setups can't be hotplugged */
dc->hotpluggable = false;
dc->props = uhci_properties_companion;
} else {
dc->props = uhci_properties_standalone;
}
set_bit(DEVICE_CATEGORY_USB, dc->categories);
u->info = *info;
}
static UHCIInfo uhci_info[] = {
{
.name = "piix3-usb-uhci",
.vendor_id = PCI_VENDOR_ID_INTEL,
.device_id = PCI_DEVICE_ID_INTEL_82371SB_2,
.revision = 0x01,
.irq_pin = 3,
.unplug = true,
},{
.name = "piix4-usb-uhci",
.vendor_id = PCI_VENDOR_ID_INTEL,
.device_id = PCI_DEVICE_ID_INTEL_82371AB_2,
.revision = 0x01,
.irq_pin = 3,
.unplug = true,
},{
.name = "vt82c686b-usb-uhci",
.vendor_id = PCI_VENDOR_ID_VIA,
.device_id = PCI_DEVICE_ID_VIA_UHCI,
.revision = 0x01,
.irq_pin = 3,
.initfn = usb_uhci_vt82c686b_initfn,
.unplug = true,
},{
.name = "ich9-usb-uhci1", /* 00:1d.0 */
.vendor_id = PCI_VENDOR_ID_INTEL,
.device_id = PCI_DEVICE_ID_INTEL_82801I_UHCI1,
.revision = 0x03,
.irq_pin = 0,
.unplug = false,
},{
.name = "ich9-usb-uhci2", /* 00:1d.1 */
.vendor_id = PCI_VENDOR_ID_INTEL,
.device_id = PCI_DEVICE_ID_INTEL_82801I_UHCI2,
.revision = 0x03,
.irq_pin = 1,
.unplug = false,
},{
.name = "ich9-usb-uhci3", /* 00:1d.2 */
.vendor_id = PCI_VENDOR_ID_INTEL,
.device_id = PCI_DEVICE_ID_INTEL_82801I_UHCI3,
.revision = 0x03,
.irq_pin = 2,
.unplug = false,
},{
.name = "ich9-usb-uhci4", /* 00:1a.0 */
.vendor_id = PCI_VENDOR_ID_INTEL,
.device_id = PCI_DEVICE_ID_INTEL_82801I_UHCI4,
.revision = 0x03,
.irq_pin = 0,
.unplug = false,
},{
.name = "ich9-usb-uhci5", /* 00:1a.1 */
.vendor_id = PCI_VENDOR_ID_INTEL,
.device_id = PCI_DEVICE_ID_INTEL_82801I_UHCI5,
.revision = 0x03,
.irq_pin = 1,
.unplug = false,
},{
.name = "ich9-usb-uhci6", /* 00:1a.2 */
.vendor_id = PCI_VENDOR_ID_INTEL,
.device_id = PCI_DEVICE_ID_INTEL_82801I_UHCI6,
.revision = 0x03,
.irq_pin = 2,
.unplug = false,
}
};
static void uhci_register_types(void)
{
TypeInfo uhci_type_info = {
.parent = TYPE_PCI_DEVICE,
.instance_size = sizeof(UHCIState),
.class_size = sizeof(UHCIPCIDeviceClass),
.class_init = uhci_class_init,
};
int i;
for (i = 0; i < ARRAY_SIZE(uhci_info); i++) {
uhci_type_info.name = uhci_info[i].name;
uhci_type_info.class_data = uhci_info + i;
type_register(&uhci_type_info);
}
}
type_init(uhci_register_types)