eb5e680ae5
Remove the cancel callback from the USBPacket struct, move it over to USBDeviceInfo. Zap usb_defer_packet() which is obsolete now. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
623 lines
17 KiB
C
623 lines
17 KiB
C
/*
|
|
* USB Mass Storage Device emulation
|
|
*
|
|
* Copyright (c) 2006 CodeSourcery.
|
|
* Written by Paul Brook
|
|
*
|
|
* This code is licenced under the LGPL.
|
|
*/
|
|
|
|
#include "qemu-common.h"
|
|
#include "qemu-option.h"
|
|
#include "qemu-config.h"
|
|
#include "usb.h"
|
|
#include "usb-desc.h"
|
|
#include "scsi.h"
|
|
#include "console.h"
|
|
#include "monitor.h"
|
|
#include "sysemu.h"
|
|
#include "blockdev.h"
|
|
|
|
//#define DEBUG_MSD
|
|
|
|
#ifdef DEBUG_MSD
|
|
#define DPRINTF(fmt, ...) \
|
|
do { printf("usb-msd: " fmt , ## __VA_ARGS__); } while (0)
|
|
#else
|
|
#define DPRINTF(fmt, ...) do {} while(0)
|
|
#endif
|
|
|
|
/* USB requests. */
|
|
#define MassStorageReset 0xff
|
|
#define GetMaxLun 0xfe
|
|
|
|
enum USBMSDMode {
|
|
USB_MSDM_CBW, /* Command Block. */
|
|
USB_MSDM_DATAOUT, /* Transfer data to device. */
|
|
USB_MSDM_DATAIN, /* Transfer data from device. */
|
|
USB_MSDM_CSW /* Command Status. */
|
|
};
|
|
|
|
typedef struct {
|
|
USBDevice dev;
|
|
enum USBMSDMode mode;
|
|
uint32_t scsi_len;
|
|
uint8_t *scsi_buf;
|
|
uint32_t usb_len;
|
|
uint8_t *usb_buf;
|
|
uint32_t data_len;
|
|
uint32_t residue;
|
|
uint32_t tag;
|
|
SCSIBus bus;
|
|
BlockConf conf;
|
|
SCSIDevice *scsi_dev;
|
|
uint32_t removable;
|
|
int result;
|
|
/* For async completion. */
|
|
USBPacket *packet;
|
|
} MSDState;
|
|
|
|
struct usb_msd_cbw {
|
|
uint32_t sig;
|
|
uint32_t tag;
|
|
uint32_t data_len;
|
|
uint8_t flags;
|
|
uint8_t lun;
|
|
uint8_t cmd_len;
|
|
uint8_t cmd[16];
|
|
};
|
|
|
|
struct usb_msd_csw {
|
|
uint32_t sig;
|
|
uint32_t tag;
|
|
uint32_t residue;
|
|
uint8_t status;
|
|
};
|
|
|
|
enum {
|
|
STR_MANUFACTURER = 1,
|
|
STR_PRODUCT,
|
|
STR_SERIALNUMBER,
|
|
STR_CONFIG_FULL,
|
|
STR_CONFIG_HIGH,
|
|
};
|
|
|
|
static const USBDescStrings desc_strings = {
|
|
[STR_MANUFACTURER] = "QEMU " QEMU_VERSION,
|
|
[STR_PRODUCT] = "QEMU USB HARDDRIVE",
|
|
[STR_SERIALNUMBER] = "1",
|
|
[STR_CONFIG_FULL] = "Full speed config (usb 1.1)",
|
|
[STR_CONFIG_HIGH] = "High speed config (usb 2.0)",
|
|
};
|
|
|
|
static const USBDescIface desc_iface_full = {
|
|
.bInterfaceNumber = 0,
|
|
.bNumEndpoints = 2,
|
|
.bInterfaceClass = USB_CLASS_MASS_STORAGE,
|
|
.bInterfaceSubClass = 0x06, /* SCSI */
|
|
.bInterfaceProtocol = 0x50, /* Bulk */
|
|
.eps = (USBDescEndpoint[]) {
|
|
{
|
|
.bEndpointAddress = USB_DIR_IN | 0x01,
|
|
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
|
.wMaxPacketSize = 64,
|
|
},{
|
|
.bEndpointAddress = USB_DIR_OUT | 0x02,
|
|
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
|
.wMaxPacketSize = 64,
|
|
},
|
|
}
|
|
};
|
|
|
|
static const USBDescDevice desc_device_full = {
|
|
.bcdUSB = 0x0200,
|
|
.bMaxPacketSize0 = 8,
|
|
.bNumConfigurations = 1,
|
|
.confs = (USBDescConfig[]) {
|
|
{
|
|
.bNumInterfaces = 1,
|
|
.bConfigurationValue = 1,
|
|
.iConfiguration = STR_CONFIG_FULL,
|
|
.bmAttributes = 0xc0,
|
|
.nif = 1,
|
|
.ifs = &desc_iface_full,
|
|
},
|
|
},
|
|
};
|
|
|
|
static const USBDescIface desc_iface_high = {
|
|
.bInterfaceNumber = 0,
|
|
.bNumEndpoints = 2,
|
|
.bInterfaceClass = USB_CLASS_MASS_STORAGE,
|
|
.bInterfaceSubClass = 0x06, /* SCSI */
|
|
.bInterfaceProtocol = 0x50, /* Bulk */
|
|
.eps = (USBDescEndpoint[]) {
|
|
{
|
|
.bEndpointAddress = USB_DIR_IN | 0x01,
|
|
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
|
.wMaxPacketSize = 512,
|
|
},{
|
|
.bEndpointAddress = USB_DIR_OUT | 0x02,
|
|
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
|
.wMaxPacketSize = 512,
|
|
},
|
|
}
|
|
};
|
|
|
|
static const USBDescDevice desc_device_high = {
|
|
.bcdUSB = 0x0200,
|
|
.bMaxPacketSize0 = 64,
|
|
.bNumConfigurations = 1,
|
|
.confs = (USBDescConfig[]) {
|
|
{
|
|
.bNumInterfaces = 1,
|
|
.bConfigurationValue = 1,
|
|
.iConfiguration = STR_CONFIG_HIGH,
|
|
.bmAttributes = 0xc0,
|
|
.nif = 1,
|
|
.ifs = &desc_iface_high,
|
|
},
|
|
},
|
|
};
|
|
|
|
static const USBDesc desc = {
|
|
.id = {
|
|
.idVendor = 0,
|
|
.idProduct = 0,
|
|
.bcdDevice = 0,
|
|
.iManufacturer = STR_MANUFACTURER,
|
|
.iProduct = STR_PRODUCT,
|
|
.iSerialNumber = STR_SERIALNUMBER,
|
|
},
|
|
.full = &desc_device_full,
|
|
.high = &desc_device_high,
|
|
.str = desc_strings,
|
|
};
|
|
|
|
static void usb_msd_copy_data(MSDState *s)
|
|
{
|
|
uint32_t len;
|
|
len = s->usb_len;
|
|
if (len > s->scsi_len)
|
|
len = s->scsi_len;
|
|
if (s->mode == USB_MSDM_DATAIN) {
|
|
memcpy(s->usb_buf, s->scsi_buf, len);
|
|
} else {
|
|
memcpy(s->scsi_buf, s->usb_buf, len);
|
|
}
|
|
s->usb_len -= len;
|
|
s->scsi_len -= len;
|
|
s->usb_buf += len;
|
|
s->scsi_buf += len;
|
|
s->data_len -= len;
|
|
if (s->scsi_len == 0 || s->data_len == 0) {
|
|
if (s->mode == USB_MSDM_DATAIN) {
|
|
s->scsi_dev->info->read_data(s->scsi_dev, s->tag);
|
|
} else if (s->mode == USB_MSDM_DATAOUT) {
|
|
s->scsi_dev->info->write_data(s->scsi_dev, s->tag);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void usb_msd_send_status(MSDState *s, USBPacket *p)
|
|
{
|
|
struct usb_msd_csw csw;
|
|
int len;
|
|
|
|
csw.sig = cpu_to_le32(0x53425355);
|
|
csw.tag = cpu_to_le32(s->tag);
|
|
csw.residue = s->residue;
|
|
csw.status = s->result;
|
|
|
|
len = MIN(sizeof(csw), p->len);
|
|
memcpy(p->data, &csw, len);
|
|
}
|
|
|
|
static void usb_msd_command_complete(SCSIBus *bus, int reason, uint32_t tag,
|
|
uint32_t arg)
|
|
{
|
|
MSDState *s = DO_UPCAST(MSDState, dev.qdev, bus->qbus.parent);
|
|
USBPacket *p = s->packet;
|
|
|
|
if (tag != s->tag) {
|
|
fprintf(stderr, "usb-msd: Unexpected SCSI Tag 0x%x\n", tag);
|
|
}
|
|
if (reason == SCSI_REASON_DONE) {
|
|
DPRINTF("Command complete %d\n", arg);
|
|
s->residue = s->data_len;
|
|
s->result = arg != 0;
|
|
if (s->packet) {
|
|
if (s->data_len == 0 && s->mode == USB_MSDM_DATAOUT) {
|
|
/* A deferred packet with no write data remaining must be
|
|
the status read packet. */
|
|
usb_msd_send_status(s, p);
|
|
s->mode = USB_MSDM_CBW;
|
|
} else {
|
|
if (s->data_len) {
|
|
s->data_len -= s->usb_len;
|
|
if (s->mode == USB_MSDM_DATAIN)
|
|
memset(s->usb_buf, 0, s->usb_len);
|
|
s->usb_len = 0;
|
|
}
|
|
if (s->data_len == 0)
|
|
s->mode = USB_MSDM_CSW;
|
|
}
|
|
s->packet = NULL;
|
|
usb_packet_complete(&s->dev, p);
|
|
} else if (s->data_len == 0) {
|
|
s->mode = USB_MSDM_CSW;
|
|
}
|
|
return;
|
|
}
|
|
s->scsi_len = arg;
|
|
s->scsi_buf = s->scsi_dev->info->get_buf(s->scsi_dev, tag);
|
|
if (p) {
|
|
usb_msd_copy_data(s);
|
|
if (s->packet && s->usb_len == 0) {
|
|
/* Set s->packet to NULL before calling usb_packet_complete
|
|
because another request may be issued before
|
|
usb_packet_complete returns. */
|
|
DPRINTF("Packet complete %p\n", p);
|
|
s->packet = NULL;
|
|
usb_packet_complete(&s->dev, p);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void usb_msd_handle_reset(USBDevice *dev)
|
|
{
|
|
MSDState *s = (MSDState *)dev;
|
|
|
|
DPRINTF("Reset\n");
|
|
s->mode = USB_MSDM_CBW;
|
|
}
|
|
|
|
static int usb_msd_handle_control(USBDevice *dev, USBPacket *p,
|
|
int request, int value, int index, int length, uint8_t *data)
|
|
{
|
|
MSDState *s = (MSDState *)dev;
|
|
int ret;
|
|
|
|
ret = usb_desc_handle_control(dev, p, request, value, index, length, data);
|
|
if (ret >= 0) {
|
|
return ret;
|
|
}
|
|
|
|
ret = 0;
|
|
switch (request) {
|
|
case DeviceRequest | USB_REQ_GET_INTERFACE:
|
|
data[0] = 0;
|
|
ret = 1;
|
|
break;
|
|
case DeviceOutRequest | USB_REQ_SET_INTERFACE:
|
|
ret = 0;
|
|
break;
|
|
case EndpointOutRequest | USB_REQ_CLEAR_FEATURE:
|
|
ret = 0;
|
|
break;
|
|
case InterfaceOutRequest | USB_REQ_SET_INTERFACE:
|
|
ret = 0;
|
|
break;
|
|
/* Class specific requests. */
|
|
case ClassInterfaceOutRequest | MassStorageReset:
|
|
/* Reset state ready for the next CBW. */
|
|
s->mode = USB_MSDM_CBW;
|
|
ret = 0;
|
|
break;
|
|
case ClassInterfaceRequest | GetMaxLun:
|
|
data[0] = 0;
|
|
ret = 1;
|
|
break;
|
|
default:
|
|
ret = USB_RET_STALL;
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static void usb_msd_cancel_io(USBDevice *dev, USBPacket *p)
|
|
{
|
|
MSDState *s = DO_UPCAST(MSDState, dev, dev);
|
|
s->scsi_dev->info->cancel_io(s->scsi_dev, s->tag);
|
|
s->packet = NULL;
|
|
s->scsi_len = 0;
|
|
}
|
|
|
|
static int usb_msd_handle_data(USBDevice *dev, USBPacket *p)
|
|
{
|
|
MSDState *s = (MSDState *)dev;
|
|
int ret = 0;
|
|
struct usb_msd_cbw cbw;
|
|
uint8_t devep = p->devep;
|
|
uint8_t *data = p->data;
|
|
int len = p->len;
|
|
|
|
switch (p->pid) {
|
|
case USB_TOKEN_OUT:
|
|
if (devep != 2)
|
|
goto fail;
|
|
|
|
switch (s->mode) {
|
|
case USB_MSDM_CBW:
|
|
if (len != 31) {
|
|
fprintf(stderr, "usb-msd: Bad CBW size");
|
|
goto fail;
|
|
}
|
|
memcpy(&cbw, data, 31);
|
|
if (le32_to_cpu(cbw.sig) != 0x43425355) {
|
|
fprintf(stderr, "usb-msd: Bad signature %08x\n",
|
|
le32_to_cpu(cbw.sig));
|
|
goto fail;
|
|
}
|
|
DPRINTF("Command on LUN %d\n", cbw.lun);
|
|
if (cbw.lun != 0) {
|
|
fprintf(stderr, "usb-msd: Bad LUN %d\n", cbw.lun);
|
|
goto fail;
|
|
}
|
|
s->tag = le32_to_cpu(cbw.tag);
|
|
s->data_len = le32_to_cpu(cbw.data_len);
|
|
if (s->data_len == 0) {
|
|
s->mode = USB_MSDM_CSW;
|
|
} else if (cbw.flags & 0x80) {
|
|
s->mode = USB_MSDM_DATAIN;
|
|
} else {
|
|
s->mode = USB_MSDM_DATAOUT;
|
|
}
|
|
DPRINTF("Command tag 0x%x flags %08x len %d data %d\n",
|
|
s->tag, cbw.flags, cbw.cmd_len, s->data_len);
|
|
s->residue = 0;
|
|
s->scsi_len = 0;
|
|
s->scsi_dev->info->send_command(s->scsi_dev, s->tag, cbw.cmd, 0);
|
|
/* ??? Should check that USB and SCSI data transfer
|
|
directions match. */
|
|
if (s->residue == 0) {
|
|
if (s->mode == USB_MSDM_DATAIN) {
|
|
s->scsi_dev->info->read_data(s->scsi_dev, s->tag);
|
|
} else if (s->mode == USB_MSDM_DATAOUT) {
|
|
s->scsi_dev->info->write_data(s->scsi_dev, s->tag);
|
|
}
|
|
}
|
|
ret = len;
|
|
break;
|
|
|
|
case USB_MSDM_DATAOUT:
|
|
DPRINTF("Data out %d/%d\n", len, s->data_len);
|
|
if (len > s->data_len)
|
|
goto fail;
|
|
|
|
s->usb_buf = data;
|
|
s->usb_len = len;
|
|
if (s->scsi_len) {
|
|
usb_msd_copy_data(s);
|
|
}
|
|
if (s->residue && s->usb_len) {
|
|
s->data_len -= s->usb_len;
|
|
if (s->data_len == 0)
|
|
s->mode = USB_MSDM_CSW;
|
|
s->usb_len = 0;
|
|
}
|
|
if (s->usb_len) {
|
|
DPRINTF("Deferring packet %p\n", p);
|
|
s->packet = p;
|
|
ret = USB_RET_ASYNC;
|
|
} else {
|
|
ret = len;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
DPRINTF("Unexpected write (len %d)\n", len);
|
|
goto fail;
|
|
}
|
|
break;
|
|
|
|
case USB_TOKEN_IN:
|
|
if (devep != 1)
|
|
goto fail;
|
|
|
|
switch (s->mode) {
|
|
case USB_MSDM_DATAOUT:
|
|
if (s->data_len != 0 || len < 13)
|
|
goto fail;
|
|
/* Waiting for SCSI write to complete. */
|
|
s->packet = p;
|
|
ret = USB_RET_ASYNC;
|
|
break;
|
|
|
|
case USB_MSDM_CSW:
|
|
DPRINTF("Command status %d tag 0x%x, len %d\n",
|
|
s->result, s->tag, len);
|
|
if (len < 13)
|
|
goto fail;
|
|
|
|
usb_msd_send_status(s, p);
|
|
s->mode = USB_MSDM_CBW;
|
|
ret = 13;
|
|
break;
|
|
|
|
case USB_MSDM_DATAIN:
|
|
DPRINTF("Data in %d/%d, scsi_len %d\n", len, s->data_len, s->scsi_len);
|
|
if (len > s->data_len)
|
|
len = s->data_len;
|
|
s->usb_buf = data;
|
|
s->usb_len = len;
|
|
if (s->scsi_len) {
|
|
usb_msd_copy_data(s);
|
|
}
|
|
if (s->residue && s->usb_len) {
|
|
s->data_len -= s->usb_len;
|
|
memset(s->usb_buf, 0, s->usb_len);
|
|
if (s->data_len == 0)
|
|
s->mode = USB_MSDM_CSW;
|
|
s->usb_len = 0;
|
|
}
|
|
if (s->usb_len) {
|
|
DPRINTF("Deferring packet %p\n", p);
|
|
s->packet = p;
|
|
ret = USB_RET_ASYNC;
|
|
} else {
|
|
ret = len;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
DPRINTF("Unexpected read (len %d)\n", len);
|
|
goto fail;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
DPRINTF("Bad token\n");
|
|
fail:
|
|
ret = USB_RET_STALL;
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void usb_msd_password_cb(void *opaque, int err)
|
|
{
|
|
MSDState *s = opaque;
|
|
|
|
if (!err)
|
|
usb_device_attach(&s->dev);
|
|
else
|
|
qdev_unplug(&s->dev.qdev);
|
|
}
|
|
|
|
static int usb_msd_initfn(USBDevice *dev)
|
|
{
|
|
MSDState *s = DO_UPCAST(MSDState, dev, dev);
|
|
BlockDriverState *bs = s->conf.bs;
|
|
DriveInfo *dinfo;
|
|
|
|
if (!bs) {
|
|
error_report("usb-msd: drive property not set");
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* Hack alert: this pretends to be a block device, but it's really
|
|
* a SCSI bus that can serve only a single device, which it
|
|
* creates automatically. But first it needs to detach from its
|
|
* blockdev, or else scsi_bus_legacy_add_drive() dies when it
|
|
* attaches again.
|
|
*
|
|
* The hack is probably a bad idea.
|
|
*/
|
|
bdrv_detach(bs, &s->dev.qdev);
|
|
s->conf.bs = NULL;
|
|
|
|
dinfo = drive_get_by_blockdev(bs);
|
|
if (dinfo && dinfo->serial) {
|
|
usb_desc_set_string(dev, STR_SERIALNUMBER, dinfo->serial);
|
|
}
|
|
|
|
usb_desc_init(dev);
|
|
scsi_bus_new(&s->bus, &s->dev.qdev, 0, 1, usb_msd_command_complete);
|
|
s->scsi_dev = scsi_bus_legacy_add_drive(&s->bus, bs, 0, !!s->removable);
|
|
if (!s->scsi_dev) {
|
|
return -1;
|
|
}
|
|
s->bus.qbus.allow_hotplug = 0;
|
|
usb_msd_handle_reset(dev);
|
|
|
|
if (bdrv_key_required(bs)) {
|
|
if (cur_mon) {
|
|
monitor_read_bdrv_key_start(cur_mon, bs, usb_msd_password_cb, s);
|
|
s->dev.auto_attach = 0;
|
|
} else {
|
|
autostart = 0;
|
|
}
|
|
}
|
|
|
|
add_boot_device_path(s->conf.bootindex, &dev->qdev, "/disk@0,0");
|
|
return 0;
|
|
}
|
|
|
|
static USBDevice *usb_msd_init(const char *filename)
|
|
{
|
|
static int nr=0;
|
|
char id[8];
|
|
QemuOpts *opts;
|
|
DriveInfo *dinfo;
|
|
USBDevice *dev;
|
|
const char *p1;
|
|
char fmt[32];
|
|
|
|
/* parse -usbdevice disk: syntax into drive opts */
|
|
snprintf(id, sizeof(id), "usb%d", nr++);
|
|
opts = qemu_opts_create(qemu_find_opts("drive"), id, 0);
|
|
|
|
p1 = strchr(filename, ':');
|
|
if (p1++) {
|
|
const char *p2;
|
|
|
|
if (strstart(filename, "format=", &p2)) {
|
|
int len = MIN(p1 - p2, sizeof(fmt));
|
|
pstrcpy(fmt, len, p2);
|
|
qemu_opt_set(opts, "format", fmt);
|
|
} else if (*filename != ':') {
|
|
printf("unrecognized USB mass-storage option %s\n", filename);
|
|
return NULL;
|
|
}
|
|
filename = p1;
|
|
}
|
|
if (!*filename) {
|
|
printf("block device specification needed\n");
|
|
return NULL;
|
|
}
|
|
qemu_opt_set(opts, "file", filename);
|
|
qemu_opt_set(opts, "if", "none");
|
|
|
|
/* create host drive */
|
|
dinfo = drive_init(opts, 0);
|
|
if (!dinfo) {
|
|
qemu_opts_del(opts);
|
|
return NULL;
|
|
}
|
|
|
|
/* create guest device */
|
|
dev = usb_create(NULL /* FIXME */, "usb-storage");
|
|
if (!dev) {
|
|
return NULL;
|
|
}
|
|
if (qdev_prop_set_drive(&dev->qdev, "drive", dinfo->bdrv) < 0) {
|
|
qdev_free(&dev->qdev);
|
|
return NULL;
|
|
}
|
|
if (qdev_init(&dev->qdev) < 0)
|
|
return NULL;
|
|
|
|
return dev;
|
|
}
|
|
|
|
static struct USBDeviceInfo msd_info = {
|
|
.product_desc = "QEMU USB MSD",
|
|
.qdev.name = "usb-storage",
|
|
.qdev.fw_name = "storage",
|
|
.qdev.size = sizeof(MSDState),
|
|
.usb_desc = &desc,
|
|
.init = usb_msd_initfn,
|
|
.handle_packet = usb_generic_handle_packet,
|
|
.cancel_packet = usb_msd_cancel_io,
|
|
.handle_attach = usb_desc_attach,
|
|
.handle_reset = usb_msd_handle_reset,
|
|
.handle_control = usb_msd_handle_control,
|
|
.handle_data = usb_msd_handle_data,
|
|
.usbdevice_name = "disk",
|
|
.usbdevice_init = usb_msd_init,
|
|
.qdev.props = (Property[]) {
|
|
DEFINE_BLOCK_PROPERTIES(MSDState, conf),
|
|
DEFINE_PROP_BIT("removable", MSDState, removable, 0, false),
|
|
DEFINE_PROP_END_OF_LIST(),
|
|
},
|
|
};
|
|
|
|
static void usb_msd_register_devices(void)
|
|
{
|
|
usb_qdev_register(&msd_info);
|
|
}
|
|
device_init(usb_msd_register_devices)
|