qemu-e2k/hw/dma/xilinx_axidma.c

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/*
* QEMU model of Xilinx AXI-DMA block.
*
* Copyright (c) 2011 Edgar E. Iglesias.
*
* 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 "qemu/osdep.h"
#include "hw/sysbus.h"
2016-03-14 09:01:28 +01:00
#include "qapi/error.h"
#include "qemu/timer.h"
#include "hw/hw.h"
#include "hw/irq.h"
#include "hw/ptimer.h"
#include "hw/qdev-properties.h"
#include "qemu/log.h"
#include "qemu/module.h"
#include "sysemu/dma.h"
#include "hw/stream.h"
#define D(x)
#define TYPE_XILINX_AXI_DMA "xlnx.axi-dma"
#define TYPE_XILINX_AXI_DMA_DATA_STREAM "xilinx-axi-dma-data-stream"
#define TYPE_XILINX_AXI_DMA_CONTROL_STREAM "xilinx-axi-dma-control-stream"
#define XILINX_AXI_DMA(obj) \
OBJECT_CHECK(XilinxAXIDMA, (obj), TYPE_XILINX_AXI_DMA)
#define XILINX_AXI_DMA_DATA_STREAM(obj) \
OBJECT_CHECK(XilinxAXIDMAStreamSlave, (obj),\
TYPE_XILINX_AXI_DMA_DATA_STREAM)
#define XILINX_AXI_DMA_CONTROL_STREAM(obj) \
OBJECT_CHECK(XilinxAXIDMAStreamSlave, (obj),\
TYPE_XILINX_AXI_DMA_CONTROL_STREAM)
#define R_DMACR (0x00 / 4)
#define R_DMASR (0x04 / 4)
#define R_CURDESC (0x08 / 4)
#define R_TAILDESC (0x10 / 4)
#define R_MAX (0x30 / 4)
#define CONTROL_PAYLOAD_WORDS 5
#define CONTROL_PAYLOAD_SIZE (CONTROL_PAYLOAD_WORDS * (sizeof(uint32_t)))
typedef struct XilinxAXIDMA XilinxAXIDMA;
typedef struct XilinxAXIDMAStreamSlave XilinxAXIDMAStreamSlave;
enum {
DMACR_RUNSTOP = 1,
DMACR_TAILPTR_MODE = 2,
DMACR_RESET = 4
};
enum {
DMASR_HALTED = 1,
DMASR_IDLE = 2,
DMASR_IOC_IRQ = 1 << 12,
DMASR_DLY_IRQ = 1 << 13,
DMASR_IRQ_MASK = 7 << 12
};
struct SDesc {
uint64_t nxtdesc;
uint64_t buffer_address;
uint64_t reserved;
uint32_t control;
uint32_t status;
uint8_t app[CONTROL_PAYLOAD_SIZE];
};
enum {
SDESC_CTRL_EOF = (1 << 26),
SDESC_CTRL_SOF = (1 << 27),
SDESC_CTRL_LEN_MASK = (1 << 23) - 1
};
enum {
SDESC_STATUS_EOF = (1 << 26),
SDESC_STATUS_SOF_BIT = 27,
SDESC_STATUS_SOF = (1 << SDESC_STATUS_SOF_BIT),
SDESC_STATUS_COMPLETE = (1 << 31)
};
struct Stream {
struct XilinxAXIDMA *dma;
ptimer_state *ptimer;
qemu_irq irq;
int nr;
bool sof;
struct SDesc desc;
unsigned int complete_cnt;
uint32_t regs[R_MAX];
uint8_t app[20];
unsigned char txbuf[16 * 1024];
};
struct XilinxAXIDMAStreamSlave {
Object parent;
struct XilinxAXIDMA *dma;
};
struct XilinxAXIDMA {
SysBusDevice busdev;
MemoryRegion iomem;
MemoryRegion *dma_mr;
AddressSpace as;
uint32_t freqhz;
StreamSlave *tx_data_dev;
StreamSlave *tx_control_dev;
XilinxAXIDMAStreamSlave rx_data_dev;
XilinxAXIDMAStreamSlave rx_control_dev;
struct Stream streams[2];
StreamCanPushNotifyFn notify;
void *notify_opaque;
};
/*
* Helper calls to extract info from descriptors and other trivial
* state from regs.
*/
static inline int stream_desc_sof(struct SDesc *d)
{
return d->control & SDESC_CTRL_SOF;
}
static inline int stream_desc_eof(struct SDesc *d)
{
return d->control & SDESC_CTRL_EOF;
}
static inline int stream_resetting(struct Stream *s)
{
return !!(s->regs[R_DMACR] & DMACR_RESET);
}
static inline int stream_running(struct Stream *s)
{
return s->regs[R_DMACR] & DMACR_RUNSTOP;
}
static inline int stream_idle(struct Stream *s)
{
return !!(s->regs[R_DMASR] & DMASR_IDLE);
}
static void stream_reset(struct Stream *s)
{
s->regs[R_DMASR] = DMASR_HALTED; /* starts up halted. */
s->regs[R_DMACR] = 1 << 16; /* Starts with one in compl threshold. */
s->sof = true;
}
/* Map an offset addr into a channel index. */
static inline int streamid_from_addr(hwaddr addr)
{
int sid;
sid = addr / (0x30);
sid &= 1;
return sid;
}
static void stream_desc_load(struct Stream *s, hwaddr addr)
{
struct SDesc *d = &s->desc;
address_space_read(&s->dma->as, addr, MEMTXATTRS_UNSPECIFIED, d, sizeof *d);
/* Convert from LE into host endianness. */
d->buffer_address = le64_to_cpu(d->buffer_address);
d->nxtdesc = le64_to_cpu(d->nxtdesc);
d->control = le32_to_cpu(d->control);
d->status = le32_to_cpu(d->status);
}
static void stream_desc_store(struct Stream *s, hwaddr addr)
{
struct SDesc *d = &s->desc;
/* Convert from host endianness into LE. */
d->buffer_address = cpu_to_le64(d->buffer_address);
d->nxtdesc = cpu_to_le64(d->nxtdesc);
d->control = cpu_to_le32(d->control);
d->status = cpu_to_le32(d->status);
address_space_write(&s->dma->as, addr, MEMTXATTRS_UNSPECIFIED,
d, sizeof *d);
}
static void stream_update_irq(struct Stream *s)
{
unsigned int pending, mask, irq;
pending = s->regs[R_DMASR] & DMASR_IRQ_MASK;
mask = s->regs[R_DMACR] & DMASR_IRQ_MASK;
irq = pending & mask;
qemu_set_irq(s->irq, !!irq);
}
static void stream_reload_complete_cnt(struct Stream *s)
{
unsigned int comp_th;
comp_th = (s->regs[R_DMACR] >> 16) & 0xff;
s->complete_cnt = comp_th;
}
static void timer_hit(void *opaque)
{
struct Stream *s = opaque;
stream_reload_complete_cnt(s);
s->regs[R_DMASR] |= DMASR_DLY_IRQ;
stream_update_irq(s);
}
static void stream_complete(struct Stream *s)
{
unsigned int comp_delay;
/* Start the delayed timer. */
ptimer_transaction_begin(s->ptimer);
comp_delay = s->regs[R_DMACR] >> 24;
if (comp_delay) {
ptimer_stop(s->ptimer);
ptimer_set_count(s->ptimer, comp_delay);
ptimer_run(s->ptimer, 1);
}
s->complete_cnt--;
if (s->complete_cnt == 0) {
/* Raise the IOC irq. */
s->regs[R_DMASR] |= DMASR_IOC_IRQ;
stream_reload_complete_cnt(s);
}
ptimer_transaction_commit(s->ptimer);
}
static void stream_process_mem2s(struct Stream *s, StreamSlave *tx_data_dev,
StreamSlave *tx_control_dev)
{
uint32_t prev_d;
uint32_t txlen;
uint64_t addr;
bool eop;
if (!stream_running(s) || stream_idle(s)) {
return;
}
while (1) {
stream_desc_load(s, s->regs[R_CURDESC]);
if (s->desc.status & SDESC_STATUS_COMPLETE) {
s->regs[R_DMASR] |= DMASR_HALTED;
break;
}
if (stream_desc_sof(&s->desc)) {
stream_push(tx_control_dev, s->desc.app, sizeof(s->desc.app), true);
}
txlen = s->desc.control & SDESC_CTRL_LEN_MASK;
eop = stream_desc_eof(&s->desc);
addr = s->desc.buffer_address;
while (txlen) {
unsigned int len;
len = txlen > sizeof s->txbuf ? sizeof s->txbuf : txlen;
address_space_read(&s->dma->as, addr,
MEMTXATTRS_UNSPECIFIED,
s->txbuf, len);
stream_push(tx_data_dev, s->txbuf, len, eop && len == txlen);
txlen -= len;
addr += len;
}
if (eop) {
stream_complete(s);
}
/* Update the descriptor. */
s->desc.status = txlen | SDESC_STATUS_COMPLETE;
stream_desc_store(s, s->regs[R_CURDESC]);
/* Advance. */
prev_d = s->regs[R_CURDESC];
s->regs[R_CURDESC] = s->desc.nxtdesc;
if (prev_d == s->regs[R_TAILDESC]) {
s->regs[R_DMASR] |= DMASR_IDLE;
break;
}
}
}
static size_t stream_process_s2mem(struct Stream *s, unsigned char *buf,
size_t len, bool eop)
{
uint32_t prev_d;
unsigned int rxlen;
size_t pos = 0;
if (!stream_running(s) || stream_idle(s)) {
return 0;
}
while (len) {
stream_desc_load(s, s->regs[R_CURDESC]);
if (s->desc.status & SDESC_STATUS_COMPLETE) {
s->regs[R_DMASR] |= DMASR_HALTED;
break;
}
rxlen = s->desc.control & SDESC_CTRL_LEN_MASK;
if (rxlen > len) {
/* It fits. */
rxlen = len;
}
address_space_write(&s->dma->as, s->desc.buffer_address,
MEMTXATTRS_UNSPECIFIED, buf + pos, rxlen);
len -= rxlen;
pos += rxlen;
/* Update the descriptor. */
if (eop) {
stream_complete(s);
memcpy(s->desc.app, s->app, sizeof(s->desc.app));
s->desc.status |= SDESC_STATUS_EOF;
}
s->desc.status |= s->sof << SDESC_STATUS_SOF_BIT;
s->desc.status |= SDESC_STATUS_COMPLETE;
stream_desc_store(s, s->regs[R_CURDESC]);
s->sof = eop;
/* Advance. */
prev_d = s->regs[R_CURDESC];
s->regs[R_CURDESC] = s->desc.nxtdesc;
if (prev_d == s->regs[R_TAILDESC]) {
s->regs[R_DMASR] |= DMASR_IDLE;
break;
}
}
return pos;
}
static void xilinx_axidma_reset(DeviceState *dev)
{
int i;
XilinxAXIDMA *s = XILINX_AXI_DMA(dev);
for (i = 0; i < 2; i++) {
stream_reset(&s->streams[i]);
}
}
static size_t
xilinx_axidma_control_stream_push(StreamSlave *obj, unsigned char *buf,
size_t len, bool eop)
{
XilinxAXIDMAStreamSlave *cs = XILINX_AXI_DMA_CONTROL_STREAM(obj);
struct Stream *s = &cs->dma->streams[1];
if (len != CONTROL_PAYLOAD_SIZE) {
hw_error("AXI DMA requires %d byte control stream payload\n",
(int)CONTROL_PAYLOAD_SIZE);
}
memcpy(s->app, buf, len);
return len;
}
static bool
xilinx_axidma_data_stream_can_push(StreamSlave *obj,
StreamCanPushNotifyFn notify,
void *notify_opaque)
{
XilinxAXIDMAStreamSlave *ds = XILINX_AXI_DMA_DATA_STREAM(obj);
struct Stream *s = &ds->dma->streams[1];
if (!stream_running(s) || stream_idle(s)) {
ds->dma->notify = notify;
ds->dma->notify_opaque = notify_opaque;
return false;
}
return true;
}
static size_t
xilinx_axidma_data_stream_push(StreamSlave *obj, unsigned char *buf, size_t len,
bool eop)
{
XilinxAXIDMAStreamSlave *ds = XILINX_AXI_DMA_DATA_STREAM(obj);
struct Stream *s = &ds->dma->streams[1];
size_t ret;
ret = stream_process_s2mem(s, buf, len, eop);
stream_update_irq(s);
return ret;
}
static uint64_t axidma_read(void *opaque, hwaddr addr,
unsigned size)
{
XilinxAXIDMA *d = opaque;
struct Stream *s;
uint32_t r = 0;
int sid;
sid = streamid_from_addr(addr);
s = &d->streams[sid];
addr = addr % 0x30;
addr >>= 2;
switch (addr) {
case R_DMACR:
/* Simulate one cycles reset delay. */
s->regs[addr] &= ~DMACR_RESET;
r = s->regs[addr];
break;
case R_DMASR:
s->regs[addr] &= 0xffff;
s->regs[addr] |= (s->complete_cnt & 0xff) << 16;
s->regs[addr] |= (ptimer_get_count(s->ptimer) & 0xff) << 24;
r = s->regs[addr];
break;
default:
r = s->regs[addr];
D(qemu_log("%s ch=%d addr=" TARGET_FMT_plx " v=%x\n",
__func__, sid, addr * 4, r));
break;
}
return r;
}
static void axidma_write(void *opaque, hwaddr addr,
uint64_t value, unsigned size)
{
XilinxAXIDMA *d = opaque;
struct Stream *s;
int sid;
sid = streamid_from_addr(addr);
s = &d->streams[sid];
addr = addr % 0x30;
addr >>= 2;
switch (addr) {
case R_DMACR:
/* Tailptr mode is always on. */
value |= DMACR_TAILPTR_MODE;
/* Remember our previous reset state. */
value |= (s->regs[addr] & DMACR_RESET);
s->regs[addr] = value;
if (value & DMACR_RESET) {
stream_reset(s);
}
if ((value & 1) && !stream_resetting(s)) {
/* Start processing. */
s->regs[R_DMASR] &= ~(DMASR_HALTED | DMASR_IDLE);
}
stream_reload_complete_cnt(s);
break;
case R_DMASR:
/* Mask away write to clear irq lines. */
value &= ~(value & DMASR_IRQ_MASK);
s->regs[addr] = value;
break;
case R_TAILDESC:
s->regs[addr] = value;
s->regs[R_DMASR] &= ~DMASR_IDLE; /* Not idle. */
if (!sid) {
stream_process_mem2s(s, d->tx_data_dev, d->tx_control_dev);
}
break;
default:
D(qemu_log("%s: ch=%d addr=" TARGET_FMT_plx " v=%x\n",
__func__, sid, addr * 4, (unsigned)value));
s->regs[addr] = value;
break;
}
if (sid == 1 && d->notify) {
StreamCanPushNotifyFn notifytmp = d->notify;
d->notify = NULL;
notifytmp(d->notify_opaque);
}
stream_update_irq(s);
}
static const MemoryRegionOps axidma_ops = {
.read = axidma_read,
.write = axidma_write,
.endianness = DEVICE_NATIVE_ENDIAN,
};
static void xilinx_axidma_realize(DeviceState *dev, Error **errp)
{
XilinxAXIDMA *s = XILINX_AXI_DMA(dev);
XilinxAXIDMAStreamSlave *ds = XILINX_AXI_DMA_DATA_STREAM(&s->rx_data_dev);
XilinxAXIDMAStreamSlave *cs = XILINX_AXI_DMA_CONTROL_STREAM(
&s->rx_control_dev);
Error *local_err = NULL;
int i;
object_property_add_link(OBJECT(ds), "dma", TYPE_XILINX_AXI_DMA,
qom: Make QOM link property unref optional Some object_property_add_link() callers expect property deletion to unref the link property object. Other callers expect to manage the refcount themselves. The former are currently broken and therefore leak the link property object. This patch adds a flags argument to object_property_add_link() so the caller can specify which refcount behavior they require. The new OBJ_PROP_LINK_UNREF_ON_RELEASE flag causes the link pointer to be unreferenced when the property is deleted. This fixes refcount leaks in qdev.c, xilinx_axidma.c, xilinx_axienet.c, s390-virtio-bus.c, virtio-pci.c, virtio-rng.c, and ui/console.c. Rationale for refcount behavior: * hw/core/qdev.c - bus children are explicitly unreferenced, don't interfere - parent_bus is essentially a read-only property that doesn't hold a refcount, don't unref - hotplug_handler is leaked, do unref * hw/dma/xilinx_axidma.c - rx stream "dma" links are set using set_link, therefore they need unref - tx streams are set using set_link, therefore they need unref * hw/net/xilinx_axienet.c - same reasoning as hw/dma/xilinx_axidma.c * hw/pcmcia/pxa2xx.c - pxa2xx bypasses set_link and therefore does not use refcounts * hw/s390x/s390-virtio-bus.c * hw/virtio/virtio-pci.c * hw/virtio/virtio-rng.c * ui/console.c - set_link is used and there is no explicit unref, do unref Cc: Peter Crosthwaite <peter.crosthwaite@petalogix.com> Cc: Alexander Graf <agraf@suse.de> Cc: Anthony Liguori <aliguori@amazon.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Andreas Färber <afaerber@suse.de>
2014-03-19 08:58:55 +01:00
(Object **)&ds->dma,
object_property_allow_set_link,
qom: Drop parameter @errp of object_property_add() & friends The only way object_property_add() can fail is when a property with the same name already exists. Since our property names are all hardcoded, failure is a programming error, and the appropriate way to handle it is passing &error_abort. Same for its variants, except for object_property_add_child(), which additionally fails when the child already has a parent. Parentage is also under program control, so this is a programming error, too. We have a bit over 500 callers. Almost half of them pass &error_abort, slightly fewer ignore errors, one test case handles errors, and the remaining few callers pass them to their own callers. The previous few commits demonstrated once again that ignoring programming errors is a bad idea. Of the few ones that pass on errors, several violate the Error API. The Error ** argument must be NULL, &error_abort, &error_fatal, or a pointer to a variable containing NULL. Passing an argument of the latter kind twice without clearing it in between is wrong: if the first call sets an error, it no longer points to NULL for the second call. ich9_pm_add_properties(), sparc32_ledma_realize(), sparc32_dma_realize(), xilinx_axidma_realize(), xilinx_enet_realize() are wrong that way. When the one appropriate choice of argument is &error_abort, letting users pick the argument is a bad idea. Drop parameter @errp and assert the preconditions instead. There's one exception to "duplicate property name is a programming error": the way object_property_add() implements the magic (and undocumented) "automatic arrayification". Don't drop @errp there. Instead, rename object_property_add() to object_property_try_add(), and add the obvious wrapper object_property_add(). Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <20200505152926.18877-15-armbru@redhat.com> [Two semantic rebase conflicts resolved]
2020-05-05 17:29:22 +02:00
OBJ_PROP_LINK_STRONG);
object_property_add_link(OBJECT(cs), "dma", TYPE_XILINX_AXI_DMA,
qom: Make QOM link property unref optional Some object_property_add_link() callers expect property deletion to unref the link property object. Other callers expect to manage the refcount themselves. The former are currently broken and therefore leak the link property object. This patch adds a flags argument to object_property_add_link() so the caller can specify which refcount behavior they require. The new OBJ_PROP_LINK_UNREF_ON_RELEASE flag causes the link pointer to be unreferenced when the property is deleted. This fixes refcount leaks in qdev.c, xilinx_axidma.c, xilinx_axienet.c, s390-virtio-bus.c, virtio-pci.c, virtio-rng.c, and ui/console.c. Rationale for refcount behavior: * hw/core/qdev.c - bus children are explicitly unreferenced, don't interfere - parent_bus is essentially a read-only property that doesn't hold a refcount, don't unref - hotplug_handler is leaked, do unref * hw/dma/xilinx_axidma.c - rx stream "dma" links are set using set_link, therefore they need unref - tx streams are set using set_link, therefore they need unref * hw/net/xilinx_axienet.c - same reasoning as hw/dma/xilinx_axidma.c * hw/pcmcia/pxa2xx.c - pxa2xx bypasses set_link and therefore does not use refcounts * hw/s390x/s390-virtio-bus.c * hw/virtio/virtio-pci.c * hw/virtio/virtio-rng.c * ui/console.c - set_link is used and there is no explicit unref, do unref Cc: Peter Crosthwaite <peter.crosthwaite@petalogix.com> Cc: Alexander Graf <agraf@suse.de> Cc: Anthony Liguori <aliguori@amazon.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Andreas Färber <afaerber@suse.de>
2014-03-19 08:58:55 +01:00
(Object **)&cs->dma,
object_property_allow_set_link,
qom: Drop parameter @errp of object_property_add() & friends The only way object_property_add() can fail is when a property with the same name already exists. Since our property names are all hardcoded, failure is a programming error, and the appropriate way to handle it is passing &error_abort. Same for its variants, except for object_property_add_child(), which additionally fails when the child already has a parent. Parentage is also under program control, so this is a programming error, too. We have a bit over 500 callers. Almost half of them pass &error_abort, slightly fewer ignore errors, one test case handles errors, and the remaining few callers pass them to their own callers. The previous few commits demonstrated once again that ignoring programming errors is a bad idea. Of the few ones that pass on errors, several violate the Error API. The Error ** argument must be NULL, &error_abort, &error_fatal, or a pointer to a variable containing NULL. Passing an argument of the latter kind twice without clearing it in between is wrong: if the first call sets an error, it no longer points to NULL for the second call. ich9_pm_add_properties(), sparc32_ledma_realize(), sparc32_dma_realize(), xilinx_axidma_realize(), xilinx_enet_realize() are wrong that way. When the one appropriate choice of argument is &error_abort, letting users pick the argument is a bad idea. Drop parameter @errp and assert the preconditions instead. There's one exception to "duplicate property name is a programming error": the way object_property_add() implements the magic (and undocumented) "automatic arrayification". Don't drop @errp there. Instead, rename object_property_add() to object_property_try_add(), and add the obvious wrapper object_property_add(). Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <20200505152926.18877-15-armbru@redhat.com> [Two semantic rebase conflicts resolved]
2020-05-05 17:29:22 +02:00
OBJ_PROP_LINK_STRONG);
object_property_set_link(OBJECT(ds), OBJECT(s), "dma", &local_err);
object_property_set_link(OBJECT(cs), OBJECT(s), "dma", &local_err);
if (local_err) {
goto xilinx_axidma_realize_fail;
}
for (i = 0; i < 2; i++) {
struct Stream *st = &s->streams[i];
st->dma = s;
st->nr = i;
st->ptimer = ptimer_init(timer_hit, st, PTIMER_POLICY_DEFAULT);
ptimer_transaction_begin(st->ptimer);
ptimer_set_freq(st->ptimer, s->freqhz);
ptimer_transaction_commit(st->ptimer);
}
address_space_init(&s->as,
s->dma_mr ? s->dma_mr : get_system_memory(), "dma");
return;
xilinx_axidma_realize_fail:
error_propagate(errp, local_err);
}
static void xilinx_axidma_init(Object *obj)
{
XilinxAXIDMA *s = XILINX_AXI_DMA(obj);
SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
object_initialize_child(OBJECT(s), "axistream-connected-target",
qom: Less verbose object_initialize_child() All users of object_initialize_child() pass the obvious child size argument. Almost all pass &error_abort and no properties. Tiresome. Rename object_initialize_child() to object_initialize_child_with_props() to free the name. New convenience wrapper object_initialize_child() automates the size argument, and passes &error_abort and no properties. Rename object_initialize_childv() to object_initialize_child_with_propsv() for consistency. Convert callers with this Coccinelle script: @@ expression parent, propname, type; expression child, size; symbol error_abort; @@ - object_initialize_child(parent, propname, OBJECT(child), size, type, &error_abort, NULL) + object_initialize_child(parent, propname, child, size, type, &error_abort, NULL) @@ expression parent, propname, type; expression child; symbol error_abort; @@ - object_initialize_child(parent, propname, child, sizeof(*child), type, &error_abort, NULL) + object_initialize_child(parent, propname, child, type) @@ expression parent, propname, type; expression child; symbol error_abort; @@ - object_initialize_child(parent, propname, &child, sizeof(child), type, &error_abort, NULL) + object_initialize_child(parent, propname, &child, type) @@ expression parent, propname, type; expression child, size, err; expression list props; @@ - object_initialize_child(parent, propname, child, size, type, err, props) + object_initialize_child_with_props(parent, propname, child, size, type, err, props) Note that Coccinelle chokes on ARMSSE typedef vs. macro in hw/arm/armsse.c. Worked around by temporarily renaming the macro for the spatch run. Signed-off-by: Markus Armbruster <armbru@redhat.com> Acked-by: Alistair Francis <alistair.francis@wdc.com> [Rebased: machine opentitan is new (commit fe0fe4735e7)] Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <20200610053247.1583243-37-armbru@redhat.com>
2020-06-10 07:32:25 +02:00
&s->rx_data_dev, TYPE_XILINX_AXI_DMA_DATA_STREAM);
object_initialize_child(OBJECT(s), "axistream-control-connected-target",
qom: Less verbose object_initialize_child() All users of object_initialize_child() pass the obvious child size argument. Almost all pass &error_abort and no properties. Tiresome. Rename object_initialize_child() to object_initialize_child_with_props() to free the name. New convenience wrapper object_initialize_child() automates the size argument, and passes &error_abort and no properties. Rename object_initialize_childv() to object_initialize_child_with_propsv() for consistency. Convert callers with this Coccinelle script: @@ expression parent, propname, type; expression child, size; symbol error_abort; @@ - object_initialize_child(parent, propname, OBJECT(child), size, type, &error_abort, NULL) + object_initialize_child(parent, propname, child, size, type, &error_abort, NULL) @@ expression parent, propname, type; expression child; symbol error_abort; @@ - object_initialize_child(parent, propname, child, sizeof(*child), type, &error_abort, NULL) + object_initialize_child(parent, propname, child, type) @@ expression parent, propname, type; expression child; symbol error_abort; @@ - object_initialize_child(parent, propname, &child, sizeof(child), type, &error_abort, NULL) + object_initialize_child(parent, propname, &child, type) @@ expression parent, propname, type; expression child, size, err; expression list props; @@ - object_initialize_child(parent, propname, child, size, type, err, props) + object_initialize_child_with_props(parent, propname, child, size, type, err, props) Note that Coccinelle chokes on ARMSSE typedef vs. macro in hw/arm/armsse.c. Worked around by temporarily renaming the macro for the spatch run. Signed-off-by: Markus Armbruster <armbru@redhat.com> Acked-by: Alistair Francis <alistair.francis@wdc.com> [Rebased: machine opentitan is new (commit fe0fe4735e7)] Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <20200610053247.1583243-37-armbru@redhat.com>
2020-06-10 07:32:25 +02:00
&s->rx_control_dev,
TYPE_XILINX_AXI_DMA_CONTROL_STREAM);
object_property_add_link(obj, "dma", TYPE_MEMORY_REGION,
(Object **)&s->dma_mr,
qdev_prop_allow_set_link_before_realize,
qom: Drop parameter @errp of object_property_add() & friends The only way object_property_add() can fail is when a property with the same name already exists. Since our property names are all hardcoded, failure is a programming error, and the appropriate way to handle it is passing &error_abort. Same for its variants, except for object_property_add_child(), which additionally fails when the child already has a parent. Parentage is also under program control, so this is a programming error, too. We have a bit over 500 callers. Almost half of them pass &error_abort, slightly fewer ignore errors, one test case handles errors, and the remaining few callers pass them to their own callers. The previous few commits demonstrated once again that ignoring programming errors is a bad idea. Of the few ones that pass on errors, several violate the Error API. The Error ** argument must be NULL, &error_abort, &error_fatal, or a pointer to a variable containing NULL. Passing an argument of the latter kind twice without clearing it in between is wrong: if the first call sets an error, it no longer points to NULL for the second call. ich9_pm_add_properties(), sparc32_ledma_realize(), sparc32_dma_realize(), xilinx_axidma_realize(), xilinx_enet_realize() are wrong that way. When the one appropriate choice of argument is &error_abort, letting users pick the argument is a bad idea. Drop parameter @errp and assert the preconditions instead. There's one exception to "duplicate property name is a programming error": the way object_property_add() implements the magic (and undocumented) "automatic arrayification". Don't drop @errp there. Instead, rename object_property_add() to object_property_try_add(), and add the obvious wrapper object_property_add(). Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <20200505152926.18877-15-armbru@redhat.com> [Two semantic rebase conflicts resolved]
2020-05-05 17:29:22 +02:00
OBJ_PROP_LINK_STRONG);
sysbus_init_irq(sbd, &s->streams[0].irq);
sysbus_init_irq(sbd, &s->streams[1].irq);
memory_region_init_io(&s->iomem, obj, &axidma_ops, s,
"xlnx.axi-dma", R_MAX * 4 * 2);
sysbus_init_mmio(sbd, &s->iomem);
}
static Property axidma_properties[] = {
DEFINE_PROP_UINT32("freqhz", XilinxAXIDMA, freqhz, 50000000),
DEFINE_PROP_LINK("axistream-connected", XilinxAXIDMA,
tx_data_dev, TYPE_STREAM_SLAVE, StreamSlave *),
DEFINE_PROP_LINK("axistream-control-connected", XilinxAXIDMA,
tx_control_dev, TYPE_STREAM_SLAVE, StreamSlave *),
DEFINE_PROP_END_OF_LIST(),
};
static void axidma_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->realize = xilinx_axidma_realize,
dc->reset = xilinx_axidma_reset;
device_class_set_props(dc, axidma_properties);
}
static StreamSlaveClass xilinx_axidma_data_stream_class = {
.push = xilinx_axidma_data_stream_push,
.can_push = xilinx_axidma_data_stream_can_push,
};
static StreamSlaveClass xilinx_axidma_control_stream_class = {
.push = xilinx_axidma_control_stream_push,
};
static void xilinx_axidma_stream_class_init(ObjectClass *klass, void *data)
{
StreamSlaveClass *ssc = STREAM_SLAVE_CLASS(klass);
ssc->push = ((StreamSlaveClass *)data)->push;
ssc->can_push = ((StreamSlaveClass *)data)->can_push;
}
static const TypeInfo axidma_info = {
.name = TYPE_XILINX_AXI_DMA,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(XilinxAXIDMA),
.class_init = axidma_class_init,
.instance_init = xilinx_axidma_init,
};
static const TypeInfo xilinx_axidma_data_stream_info = {
.name = TYPE_XILINX_AXI_DMA_DATA_STREAM,
.parent = TYPE_OBJECT,
.instance_size = sizeof(struct XilinxAXIDMAStreamSlave),
.class_init = xilinx_axidma_stream_class_init,
.class_data = &xilinx_axidma_data_stream_class,
.interfaces = (InterfaceInfo[]) {
{ TYPE_STREAM_SLAVE },
{ }
}
};
static const TypeInfo xilinx_axidma_control_stream_info = {
.name = TYPE_XILINX_AXI_DMA_CONTROL_STREAM,
.parent = TYPE_OBJECT,
.instance_size = sizeof(struct XilinxAXIDMAStreamSlave),
.class_init = xilinx_axidma_stream_class_init,
.class_data = &xilinx_axidma_control_stream_class,
.interfaces = (InterfaceInfo[]) {
{ TYPE_STREAM_SLAVE },
{ }
}
};
static void xilinx_axidma_register_types(void)
{
type_register_static(&axidma_info);
type_register_static(&xilinx_axidma_data_stream_info);
type_register_static(&xilinx_axidma_control_stream_info);
}
type_init(xilinx_axidma_register_types)