25 |
25 |
BlockDriverState *bs;
|
26 |
26 |
VirtQueue *vq;
|
27 |
27 |
void *rq;
|
|
28 |
char serial_str[BLOCK_SERIAL_STRLEN + 1];
|
28 |
29 |
} VirtIOBlock;
|
29 |
30 |
|
30 |
31 |
static VirtIOBlock *to_virtio_blk(VirtIODevice *vdev)
|
... | ... | |
32 |
33 |
return (VirtIOBlock *)vdev;
|
33 |
34 |
}
|
34 |
35 |
|
|
36 |
/* store identify data in little endian format
|
|
37 |
*/
|
|
38 |
static inline void put_le16(uint16_t *p, unsigned int v)
|
|
39 |
{
|
|
40 |
*p = cpu_to_le16(v);
|
|
41 |
}
|
|
42 |
|
|
43 |
/* copy to *dst from *src, nul pad dst tail as needed to len bytes
|
|
44 |
*/
|
|
45 |
static inline void padstr(char *dst, const char *src, int len)
|
|
46 |
{
|
|
47 |
while (len--)
|
|
48 |
*dst++ = *src ? *src++ : '\0';
|
|
49 |
}
|
|
50 |
|
|
51 |
/* setup simulated identify data as appropriate for virtio block device
|
|
52 |
*
|
|
53 |
* ref: AT Attachment 8 - ATA/ATAPI Command Set (ATA8-ACS)
|
|
54 |
*/
|
|
55 |
static inline void virtio_identify_template(struct virtio_blk_config *bc)
|
|
56 |
{
|
|
57 |
uint16_t *p = &bc->identify[0];
|
|
58 |
uint64_t lba_sectors = bc->capacity;
|
|
59 |
|
|
60 |
memset(p, 0, sizeof(bc->identify));
|
|
61 |
put_le16(p + 0, 0x0); /* ATA device */
|
|
62 |
padstr((char *)(p + 23), QEMU_VERSION, 8); /* firmware revision */
|
|
63 |
padstr((char *)(p + 27), "QEMU VIRT_BLK", 40); /* model# */
|
|
64 |
put_le16(p + 47, 0x80ff); /* max xfer 255 sectors */
|
|
65 |
put_le16(p + 49, 0x0b00); /* support IORDY/LBA/DMA */
|
|
66 |
put_le16(p + 59, 0x1ff); /* cur xfer 255 sectors */
|
|
67 |
put_le16(p + 80, 0x1f0); /* support ATA8/7/6/5/4 */
|
|
68 |
put_le16(p + 81, 0x16);
|
|
69 |
put_le16(p + 82, 0x400);
|
|
70 |
put_le16(p + 83, 0x400);
|
|
71 |
put_le16(p + 100, lba_sectors);
|
|
72 |
put_le16(p + 101, lba_sectors >> 16);
|
|
73 |
put_le16(p + 102, lba_sectors >> 32);
|
|
74 |
put_le16(p + 103, lba_sectors >> 48);
|
|
75 |
}
|
|
76 |
|
35 |
77 |
typedef struct VirtIOBlockReq
|
36 |
78 |
{
|
37 |
79 |
VirtIOBlock *dev;
|
... | ... | |
285 |
327 |
qemu_aio_flush();
|
286 |
328 |
}
|
287 |
329 |
|
|
330 |
/* coalesce internal state, copy to pci i/o region 0
|
|
331 |
*/
|
288 |
332 |
static void virtio_blk_update_config(VirtIODevice *vdev, uint8_t *config)
|
289 |
333 |
{
|
290 |
334 |
VirtIOBlock *s = to_virtio_blk(vdev);
|
... | ... | |
301 |
345 |
blkcfg.heads = heads;
|
302 |
346 |
blkcfg.sectors = secs;
|
303 |
347 |
blkcfg.size_max = 0;
|
|
348 |
virtio_identify_template(&blkcfg);
|
|
349 |
memcpy(&blkcfg.identify[VIRTIO_BLK_ID_SN], s->serial_str,
|
|
350 |
VIRTIO_BLK_ID_SN_BYTES);
|
304 |
351 |
memcpy(config, &blkcfg, sizeof(blkcfg));
|
305 |
352 |
}
|
306 |
353 |
|
307 |
354 |
static uint32_t virtio_blk_get_features(VirtIODevice *vdev)
|
308 |
355 |
{
|
|
356 |
VirtIOBlock *s = to_virtio_blk(vdev);
|
309 |
357 |
uint32_t features = 0;
|
310 |
358 |
|
311 |
359 |
features |= (1 << VIRTIO_BLK_F_SEG_MAX);
|
... | ... | |
313 |
361 |
#ifdef __linux__
|
314 |
362 |
features |= (1 << VIRTIO_BLK_F_SCSI);
|
315 |
363 |
#endif
|
|
364 |
if (strcmp(s->serial_str, "0"))
|
|
365 |
features |= 1 << VIRTIO_BLK_F_IDENTIFY;
|
316 |
366 |
|
317 |
367 |
return features;
|
318 |
368 |
}
|
... | ... | |
356 |
406 |
int cylinders, heads, secs;
|
357 |
407 |
static int virtio_blk_id;
|
358 |
408 |
BlockDriverState *bs;
|
|
409 |
char *ps;
|
359 |
410 |
|
360 |
411 |
s = (VirtIOBlock *)virtio_common_init("virtio-blk", VIRTIO_ID_BLOCK,
|
361 |
412 |
sizeof(struct virtio_blk_config),
|
... | ... | |
367 |
418 |
s->vdev.reset = virtio_blk_reset;
|
368 |
419 |
s->bs = bs;
|
369 |
420 |
s->rq = NULL;
|
|
421 |
if (strlen(ps = (char *)drive_get_serial(bs)))
|
|
422 |
strncpy(s->serial_str, ps, sizeof(s->serial_str));
|
|
423 |
else
|
|
424 |
snprintf(s->serial_str, sizeof(s->serial_str), "0");
|
370 |
425 |
bs->private = dev;
|
371 |
426 |
bdrv_guess_geometry(s->bs, &cylinders, &heads, &secs);
|
372 |
427 |
bdrv_set_geometry_hint(s->bs, cylinders, heads, secs);
|