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usb-storage: fill status in complete callback.

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Put status word into device state, fill it in command_complete, have
usb_msd_send_status just send it out.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2011-11-21 11:29:27 +01:00
parent e04da7c3d1
commit 92a114f6f8
1 changed files with 20 additions and 16 deletions
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36
hw/usb-msd.c
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@ -38,6 +38,13 @@ enum USBMSDMode {
USB_MSDM_CSW /* Command Status. */
};
struct usb_msd_csw {
uint32_t sig;
uint32_t tag;
uint32_t residue;
uint8_t status;
};
typedef struct {
USBDevice dev;
enum USBMSDMode mode;
@ -46,6 +53,7 @@ typedef struct {
uint32_t data_len;
uint32_t residue;
uint32_t tag;
struct usb_msd_csw csw;
SCSIRequest *req;
SCSIBus bus;
BlockConf conf;
@ -67,13 +75,6 @@ struct usb_msd_cbw {
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,
@ -191,19 +192,15 @@ static void usb_msd_copy_data(MSDState *s, USBPacket *p)
static void usb_msd_send_status(MSDState *s, USBPacket *p)
{
struct usb_msd_csw csw;
int len;
DPRINTF("Command status %d tag 0x%x, len %zd\n",
s->result, s->tag, p->iov.size);
csw.sig = cpu_to_le32(0x53425355);
csw.tag = cpu_to_le32(s->tag);
csw.residue = s->residue;
csw.status = s->result;
s->csw.status, s->csw.tag, p->iov.size);
len = MIN(sizeof(csw), p->iov.size);
usb_packet_copy(p, &csw, len);
p->result = len;
assert(s->csw.sig == 0x53425355);
len = MIN(sizeof(s->csw), p->iov.size);
usb_packet_copy(p, &s->csw, len);
memset(&s->csw, 0, sizeof(s->csw));
}
static void usb_msd_transfer_data(SCSIRequest *req, uint32_t len)
@ -236,6 +233,12 @@ static void usb_msd_command_complete(SCSIRequest *req, uint32_t status)
DPRINTF("Command complete %d\n", status);
s->residue = s->data_len;
s->result = status != 0;
s->csw.sig = cpu_to_le32(0x53425355);
s->csw.tag = cpu_to_le32(s->tag);
s->csw.residue = s->residue;
s->csw.status = s->result;
if (s->packet) {
if (s->data_len == 0 && s->mode == USB_MSDM_DATAOUT) {
/* A deferred packet with no write data remaining must be
@ -257,6 +260,7 @@ static void usb_msd_command_complete(SCSIRequest *req, uint32_t status)
} else if (s->data_len == 0) {
s->mode = USB_MSDM_CSW;
}
scsi_req_unref(req);
s->req = NULL;
}