16e790746SPaolo Bonzini /* 26e790746SPaolo Bonzini * Virtio Block Device 36e790746SPaolo Bonzini * 46e790746SPaolo Bonzini * Copyright IBM, Corp. 2007 56e790746SPaolo Bonzini * 66e790746SPaolo Bonzini * Authors: 76e790746SPaolo Bonzini * Anthony Liguori <aliguori@us.ibm.com> 86e790746SPaolo Bonzini * 96e790746SPaolo Bonzini * This work is licensed under the terms of the GNU GPL, version 2. See 106e790746SPaolo Bonzini * the COPYING file in the top-level directory. 116e790746SPaolo Bonzini * 126e790746SPaolo Bonzini */ 136e790746SPaolo Bonzini 146e790746SPaolo Bonzini #include "qemu-common.h" 156e790746SPaolo Bonzini #include "qemu/error-report.h" 166e790746SPaolo Bonzini #include "trace.h" 176e790746SPaolo Bonzini #include "hw/block/block.h" 186e790746SPaolo Bonzini #include "sysemu/blockdev.h" 196e790746SPaolo Bonzini #include "hw/virtio/virtio-blk.h" 206e790746SPaolo Bonzini #ifdef CONFIG_VIRTIO_BLK_DATA_PLANE 216e790746SPaolo Bonzini # include "dataplane/virtio-blk.h" 226e790746SPaolo Bonzini #endif 236e790746SPaolo Bonzini #include "block/scsi.h" 246e790746SPaolo Bonzini #ifdef __linux__ 256e790746SPaolo Bonzini # include <scsi/sg.h> 266e790746SPaolo Bonzini #endif 276e790746SPaolo Bonzini #include "hw/virtio/virtio-bus.h" 286e790746SPaolo Bonzini 296e790746SPaolo Bonzini typedef struct VirtIOBlockReq 306e790746SPaolo Bonzini { 316e790746SPaolo Bonzini VirtIOBlock *dev; 326e790746SPaolo Bonzini VirtQueueElement elem; 336e790746SPaolo Bonzini struct virtio_blk_inhdr *in; 346e790746SPaolo Bonzini struct virtio_blk_outhdr *out; 356e790746SPaolo Bonzini struct virtio_scsi_inhdr *scsi; 366e790746SPaolo Bonzini QEMUIOVector qiov; 376e790746SPaolo Bonzini struct VirtIOBlockReq *next; 386e790746SPaolo Bonzini BlockAcctCookie acct; 396e790746SPaolo Bonzini } VirtIOBlockReq; 406e790746SPaolo Bonzini 416e790746SPaolo Bonzini static void virtio_blk_req_complete(VirtIOBlockReq *req, int status) 426e790746SPaolo Bonzini { 436e790746SPaolo Bonzini VirtIOBlock *s = req->dev; 446e790746SPaolo Bonzini VirtIODevice *vdev = VIRTIO_DEVICE(s); 456e790746SPaolo Bonzini 466e790746SPaolo Bonzini trace_virtio_blk_req_complete(req, status); 476e790746SPaolo Bonzini 486e790746SPaolo Bonzini stb_p(&req->in->status, status); 496e790746SPaolo Bonzini virtqueue_push(s->vq, &req->elem, req->qiov.size + sizeof(*req->in)); 506e790746SPaolo Bonzini virtio_notify(vdev, s->vq); 516e790746SPaolo Bonzini } 526e790746SPaolo Bonzini 536e790746SPaolo Bonzini static int virtio_blk_handle_rw_error(VirtIOBlockReq *req, int error, 546e790746SPaolo Bonzini bool is_read) 556e790746SPaolo Bonzini { 566e790746SPaolo Bonzini BlockErrorAction action = bdrv_get_error_action(req->dev->bs, is_read, error); 576e790746SPaolo Bonzini VirtIOBlock *s = req->dev; 586e790746SPaolo Bonzini 596e790746SPaolo Bonzini if (action == BDRV_ACTION_STOP) { 606e790746SPaolo Bonzini req->next = s->rq; 616e790746SPaolo Bonzini s->rq = req; 626e790746SPaolo Bonzini } else if (action == BDRV_ACTION_REPORT) { 636e790746SPaolo Bonzini virtio_blk_req_complete(req, VIRTIO_BLK_S_IOERR); 646e790746SPaolo Bonzini bdrv_acct_done(s->bs, &req->acct); 656e790746SPaolo Bonzini g_free(req); 666e790746SPaolo Bonzini } 676e790746SPaolo Bonzini 686e790746SPaolo Bonzini bdrv_error_action(s->bs, action, is_read, error); 696e790746SPaolo Bonzini return action != BDRV_ACTION_IGNORE; 706e790746SPaolo Bonzini } 716e790746SPaolo Bonzini 726e790746SPaolo Bonzini static void virtio_blk_rw_complete(void *opaque, int ret) 736e790746SPaolo Bonzini { 746e790746SPaolo Bonzini VirtIOBlockReq *req = opaque; 756e790746SPaolo Bonzini 766e790746SPaolo Bonzini trace_virtio_blk_rw_complete(req, ret); 776e790746SPaolo Bonzini 786e790746SPaolo Bonzini if (ret) { 796e790746SPaolo Bonzini bool is_read = !(ldl_p(&req->out->type) & VIRTIO_BLK_T_OUT); 806e790746SPaolo Bonzini if (virtio_blk_handle_rw_error(req, -ret, is_read)) 816e790746SPaolo Bonzini return; 826e790746SPaolo Bonzini } 836e790746SPaolo Bonzini 846e790746SPaolo Bonzini virtio_blk_req_complete(req, VIRTIO_BLK_S_OK); 856e790746SPaolo Bonzini bdrv_acct_done(req->dev->bs, &req->acct); 866e790746SPaolo Bonzini g_free(req); 876e790746SPaolo Bonzini } 886e790746SPaolo Bonzini 896e790746SPaolo Bonzini static void virtio_blk_flush_complete(void *opaque, int ret) 906e790746SPaolo Bonzini { 916e790746SPaolo Bonzini VirtIOBlockReq *req = opaque; 926e790746SPaolo Bonzini 936e790746SPaolo Bonzini if (ret) { 946e790746SPaolo Bonzini if (virtio_blk_handle_rw_error(req, -ret, 0)) { 956e790746SPaolo Bonzini return; 966e790746SPaolo Bonzini } 976e790746SPaolo Bonzini } 986e790746SPaolo Bonzini 996e790746SPaolo Bonzini virtio_blk_req_complete(req, VIRTIO_BLK_S_OK); 1006e790746SPaolo Bonzini bdrv_acct_done(req->dev->bs, &req->acct); 1016e790746SPaolo Bonzini g_free(req); 1026e790746SPaolo Bonzini } 1036e790746SPaolo Bonzini 1046e790746SPaolo Bonzini static VirtIOBlockReq *virtio_blk_alloc_request(VirtIOBlock *s) 1056e790746SPaolo Bonzini { 1066e790746SPaolo Bonzini VirtIOBlockReq *req = g_malloc(sizeof(*req)); 1076e790746SPaolo Bonzini req->dev = s; 1086e790746SPaolo Bonzini req->qiov.size = 0; 1096e790746SPaolo Bonzini req->next = NULL; 1106e790746SPaolo Bonzini return req; 1116e790746SPaolo Bonzini } 1126e790746SPaolo Bonzini 1136e790746SPaolo Bonzini static VirtIOBlockReq *virtio_blk_get_request(VirtIOBlock *s) 1146e790746SPaolo Bonzini { 1156e790746SPaolo Bonzini VirtIOBlockReq *req = virtio_blk_alloc_request(s); 1166e790746SPaolo Bonzini 1176e790746SPaolo Bonzini if (req != NULL) { 1186e790746SPaolo Bonzini if (!virtqueue_pop(s->vq, &req->elem)) { 1196e790746SPaolo Bonzini g_free(req); 1206e790746SPaolo Bonzini return NULL; 1216e790746SPaolo Bonzini } 1226e790746SPaolo Bonzini } 1236e790746SPaolo Bonzini 1246e790746SPaolo Bonzini return req; 1256e790746SPaolo Bonzini } 1266e790746SPaolo Bonzini 1276e790746SPaolo Bonzini static void virtio_blk_handle_scsi(VirtIOBlockReq *req) 1286e790746SPaolo Bonzini { 1296e790746SPaolo Bonzini #ifdef __linux__ 1306e790746SPaolo Bonzini int ret; 1316e790746SPaolo Bonzini int i; 1326e790746SPaolo Bonzini #endif 1336e790746SPaolo Bonzini int status = VIRTIO_BLK_S_OK; 1346e790746SPaolo Bonzini 1356e790746SPaolo Bonzini /* 1366e790746SPaolo Bonzini * We require at least one output segment each for the virtio_blk_outhdr 1376e790746SPaolo Bonzini * and the SCSI command block. 1386e790746SPaolo Bonzini * 1396e790746SPaolo Bonzini * We also at least require the virtio_blk_inhdr, the virtio_scsi_inhdr 1406e790746SPaolo Bonzini * and the sense buffer pointer in the input segments. 1416e790746SPaolo Bonzini */ 1426e790746SPaolo Bonzini if (req->elem.out_num < 2 || req->elem.in_num < 3) { 1436e790746SPaolo Bonzini virtio_blk_req_complete(req, VIRTIO_BLK_S_IOERR); 1446e790746SPaolo Bonzini g_free(req); 1456e790746SPaolo Bonzini return; 1466e790746SPaolo Bonzini } 1476e790746SPaolo Bonzini 1486e790746SPaolo Bonzini /* 1496e790746SPaolo Bonzini * The scsi inhdr is placed in the second-to-last input segment, just 1506e790746SPaolo Bonzini * before the regular inhdr. 1516e790746SPaolo Bonzini */ 1526e790746SPaolo Bonzini req->scsi = (void *)req->elem.in_sg[req->elem.in_num - 2].iov_base; 1536e790746SPaolo Bonzini 1546e790746SPaolo Bonzini if (!req->dev->blk.scsi) { 1556e790746SPaolo Bonzini status = VIRTIO_BLK_S_UNSUPP; 1566e790746SPaolo Bonzini goto fail; 1576e790746SPaolo Bonzini } 1586e790746SPaolo Bonzini 1596e790746SPaolo Bonzini /* 1606e790746SPaolo Bonzini * No support for bidirection commands yet. 1616e790746SPaolo Bonzini */ 1626e790746SPaolo Bonzini if (req->elem.out_num > 2 && req->elem.in_num > 3) { 1636e790746SPaolo Bonzini status = VIRTIO_BLK_S_UNSUPP; 1646e790746SPaolo Bonzini goto fail; 1656e790746SPaolo Bonzini } 1666e790746SPaolo Bonzini 1676e790746SPaolo Bonzini #ifdef __linux__ 1686e790746SPaolo Bonzini struct sg_io_hdr hdr; 1696e790746SPaolo Bonzini memset(&hdr, 0, sizeof(struct sg_io_hdr)); 1706e790746SPaolo Bonzini hdr.interface_id = 'S'; 1716e790746SPaolo Bonzini hdr.cmd_len = req->elem.out_sg[1].iov_len; 1726e790746SPaolo Bonzini hdr.cmdp = req->elem.out_sg[1].iov_base; 1736e790746SPaolo Bonzini hdr.dxfer_len = 0; 1746e790746SPaolo Bonzini 1756e790746SPaolo Bonzini if (req->elem.out_num > 2) { 1766e790746SPaolo Bonzini /* 1776e790746SPaolo Bonzini * If there are more than the minimally required 2 output segments 1786e790746SPaolo Bonzini * there is write payload starting from the third iovec. 1796e790746SPaolo Bonzini */ 1806e790746SPaolo Bonzini hdr.dxfer_direction = SG_DXFER_TO_DEV; 1816e790746SPaolo Bonzini hdr.iovec_count = req->elem.out_num - 2; 1826e790746SPaolo Bonzini 1836e790746SPaolo Bonzini for (i = 0; i < hdr.iovec_count; i++) 1846e790746SPaolo Bonzini hdr.dxfer_len += req->elem.out_sg[i + 2].iov_len; 1856e790746SPaolo Bonzini 1866e790746SPaolo Bonzini hdr.dxferp = req->elem.out_sg + 2; 1876e790746SPaolo Bonzini 1886e790746SPaolo Bonzini } else if (req->elem.in_num > 3) { 1896e790746SPaolo Bonzini /* 1906e790746SPaolo Bonzini * If we have more than 3 input segments the guest wants to actually 1916e790746SPaolo Bonzini * read data. 1926e790746SPaolo Bonzini */ 1936e790746SPaolo Bonzini hdr.dxfer_direction = SG_DXFER_FROM_DEV; 1946e790746SPaolo Bonzini hdr.iovec_count = req->elem.in_num - 3; 1956e790746SPaolo Bonzini for (i = 0; i < hdr.iovec_count; i++) 1966e790746SPaolo Bonzini hdr.dxfer_len += req->elem.in_sg[i].iov_len; 1976e790746SPaolo Bonzini 1986e790746SPaolo Bonzini hdr.dxferp = req->elem.in_sg; 1996e790746SPaolo Bonzini } else { 2006e790746SPaolo Bonzini /* 2016e790746SPaolo Bonzini * Some SCSI commands don't actually transfer any data. 2026e790746SPaolo Bonzini */ 2036e790746SPaolo Bonzini hdr.dxfer_direction = SG_DXFER_NONE; 2046e790746SPaolo Bonzini } 2056e790746SPaolo Bonzini 2066e790746SPaolo Bonzini hdr.sbp = req->elem.in_sg[req->elem.in_num - 3].iov_base; 2076e790746SPaolo Bonzini hdr.mx_sb_len = req->elem.in_sg[req->elem.in_num - 3].iov_len; 2086e790746SPaolo Bonzini 2096e790746SPaolo Bonzini ret = bdrv_ioctl(req->dev->bs, SG_IO, &hdr); 2106e790746SPaolo Bonzini if (ret) { 2116e790746SPaolo Bonzini status = VIRTIO_BLK_S_UNSUPP; 2126e790746SPaolo Bonzini goto fail; 2136e790746SPaolo Bonzini } 2146e790746SPaolo Bonzini 2156e790746SPaolo Bonzini /* 2166e790746SPaolo Bonzini * From SCSI-Generic-HOWTO: "Some lower level drivers (e.g. ide-scsi) 2176e790746SPaolo Bonzini * clear the masked_status field [hence status gets cleared too, see 2186e790746SPaolo Bonzini * block/scsi_ioctl.c] even when a CHECK_CONDITION or COMMAND_TERMINATED 2196e790746SPaolo Bonzini * status has occurred. However they do set DRIVER_SENSE in driver_status 2206e790746SPaolo Bonzini * field. Also a (sb_len_wr > 0) indicates there is a sense buffer. 2216e790746SPaolo Bonzini */ 2226e790746SPaolo Bonzini if (hdr.status == 0 && hdr.sb_len_wr > 0) { 2236e790746SPaolo Bonzini hdr.status = CHECK_CONDITION; 2246e790746SPaolo Bonzini } 2256e790746SPaolo Bonzini 2266e790746SPaolo Bonzini stl_p(&req->scsi->errors, 2276e790746SPaolo Bonzini hdr.status | (hdr.msg_status << 8) | 2286e790746SPaolo Bonzini (hdr.host_status << 16) | (hdr.driver_status << 24)); 2296e790746SPaolo Bonzini stl_p(&req->scsi->residual, hdr.resid); 2306e790746SPaolo Bonzini stl_p(&req->scsi->sense_len, hdr.sb_len_wr); 2316e790746SPaolo Bonzini stl_p(&req->scsi->data_len, hdr.dxfer_len); 2326e790746SPaolo Bonzini 2336e790746SPaolo Bonzini virtio_blk_req_complete(req, status); 2346e790746SPaolo Bonzini g_free(req); 2356e790746SPaolo Bonzini return; 2366e790746SPaolo Bonzini #else 2376e790746SPaolo Bonzini abort(); 2386e790746SPaolo Bonzini #endif 2396e790746SPaolo Bonzini 2406e790746SPaolo Bonzini fail: 2416e790746SPaolo Bonzini /* Just put anything nonzero so that the ioctl fails in the guest. */ 2426e790746SPaolo Bonzini stl_p(&req->scsi->errors, 255); 2436e790746SPaolo Bonzini virtio_blk_req_complete(req, status); 2446e790746SPaolo Bonzini g_free(req); 2456e790746SPaolo Bonzini } 2466e790746SPaolo Bonzini 2476e790746SPaolo Bonzini typedef struct MultiReqBuffer { 2486e790746SPaolo Bonzini BlockRequest blkreq[32]; 2496e790746SPaolo Bonzini unsigned int num_writes; 2506e790746SPaolo Bonzini } MultiReqBuffer; 2516e790746SPaolo Bonzini 2526e790746SPaolo Bonzini static void virtio_submit_multiwrite(BlockDriverState *bs, MultiReqBuffer *mrb) 2536e790746SPaolo Bonzini { 2546e790746SPaolo Bonzini int i, ret; 2556e790746SPaolo Bonzini 2566e790746SPaolo Bonzini if (!mrb->num_writes) { 2576e790746SPaolo Bonzini return; 2586e790746SPaolo Bonzini } 2596e790746SPaolo Bonzini 2606e790746SPaolo Bonzini ret = bdrv_aio_multiwrite(bs, mrb->blkreq, mrb->num_writes); 2616e790746SPaolo Bonzini if (ret != 0) { 2626e790746SPaolo Bonzini for (i = 0; i < mrb->num_writes; i++) { 2636e790746SPaolo Bonzini if (mrb->blkreq[i].error) { 2646e790746SPaolo Bonzini virtio_blk_rw_complete(mrb->blkreq[i].opaque, -EIO); 2656e790746SPaolo Bonzini } 2666e790746SPaolo Bonzini } 2676e790746SPaolo Bonzini } 2686e790746SPaolo Bonzini 2696e790746SPaolo Bonzini mrb->num_writes = 0; 2706e790746SPaolo Bonzini } 2716e790746SPaolo Bonzini 2726e790746SPaolo Bonzini static void virtio_blk_handle_flush(VirtIOBlockReq *req, MultiReqBuffer *mrb) 2736e790746SPaolo Bonzini { 2746e790746SPaolo Bonzini bdrv_acct_start(req->dev->bs, &req->acct, 0, BDRV_ACCT_FLUSH); 2756e790746SPaolo Bonzini 2766e790746SPaolo Bonzini /* 2776e790746SPaolo Bonzini * Make sure all outstanding writes are posted to the backing device. 2786e790746SPaolo Bonzini */ 2796e790746SPaolo Bonzini virtio_submit_multiwrite(req->dev->bs, mrb); 2806e790746SPaolo Bonzini bdrv_aio_flush(req->dev->bs, virtio_blk_flush_complete, req); 2816e790746SPaolo Bonzini } 2826e790746SPaolo Bonzini 2836e790746SPaolo Bonzini static void virtio_blk_handle_write(VirtIOBlockReq *req, MultiReqBuffer *mrb) 2846e790746SPaolo Bonzini { 2856e790746SPaolo Bonzini BlockRequest *blkreq; 2866e790746SPaolo Bonzini uint64_t sector; 2876e790746SPaolo Bonzini 2886e790746SPaolo Bonzini sector = ldq_p(&req->out->sector); 2896e790746SPaolo Bonzini 2906e790746SPaolo Bonzini bdrv_acct_start(req->dev->bs, &req->acct, req->qiov.size, BDRV_ACCT_WRITE); 2916e790746SPaolo Bonzini 2926e790746SPaolo Bonzini trace_virtio_blk_handle_write(req, sector, req->qiov.size / 512); 2936e790746SPaolo Bonzini 2946e790746SPaolo Bonzini if (sector & req->dev->sector_mask) { 2956e790746SPaolo Bonzini virtio_blk_rw_complete(req, -EIO); 2966e790746SPaolo Bonzini return; 2976e790746SPaolo Bonzini } 2986e790746SPaolo Bonzini if (req->qiov.size % req->dev->conf->logical_block_size) { 2996e790746SPaolo Bonzini virtio_blk_rw_complete(req, -EIO); 3006e790746SPaolo Bonzini return; 3016e790746SPaolo Bonzini } 3026e790746SPaolo Bonzini 3036e790746SPaolo Bonzini if (mrb->num_writes == 32) { 3046e790746SPaolo Bonzini virtio_submit_multiwrite(req->dev->bs, mrb); 3056e790746SPaolo Bonzini } 3066e790746SPaolo Bonzini 3076e790746SPaolo Bonzini blkreq = &mrb->blkreq[mrb->num_writes]; 3086e790746SPaolo Bonzini blkreq->sector = sector; 3096e790746SPaolo Bonzini blkreq->nb_sectors = req->qiov.size / BDRV_SECTOR_SIZE; 3106e790746SPaolo Bonzini blkreq->qiov = &req->qiov; 3116e790746SPaolo Bonzini blkreq->cb = virtio_blk_rw_complete; 3126e790746SPaolo Bonzini blkreq->opaque = req; 3136e790746SPaolo Bonzini blkreq->error = 0; 3146e790746SPaolo Bonzini 3156e790746SPaolo Bonzini mrb->num_writes++; 3166e790746SPaolo Bonzini } 3176e790746SPaolo Bonzini 3186e790746SPaolo Bonzini static void virtio_blk_handle_read(VirtIOBlockReq *req) 3196e790746SPaolo Bonzini { 3206e790746SPaolo Bonzini uint64_t sector; 3216e790746SPaolo Bonzini 3226e790746SPaolo Bonzini sector = ldq_p(&req->out->sector); 3236e790746SPaolo Bonzini 3246e790746SPaolo Bonzini bdrv_acct_start(req->dev->bs, &req->acct, req->qiov.size, BDRV_ACCT_READ); 3256e790746SPaolo Bonzini 3266e790746SPaolo Bonzini trace_virtio_blk_handle_read(req, sector, req->qiov.size / 512); 3276e790746SPaolo Bonzini 3286e790746SPaolo Bonzini if (sector & req->dev->sector_mask) { 3296e790746SPaolo Bonzini virtio_blk_rw_complete(req, -EIO); 3306e790746SPaolo Bonzini return; 3316e790746SPaolo Bonzini } 3326e790746SPaolo Bonzini if (req->qiov.size % req->dev->conf->logical_block_size) { 3336e790746SPaolo Bonzini virtio_blk_rw_complete(req, -EIO); 3346e790746SPaolo Bonzini return; 3356e790746SPaolo Bonzini } 3366e790746SPaolo Bonzini bdrv_aio_readv(req->dev->bs, sector, &req->qiov, 3376e790746SPaolo Bonzini req->qiov.size / BDRV_SECTOR_SIZE, 3386e790746SPaolo Bonzini virtio_blk_rw_complete, req); 3396e790746SPaolo Bonzini } 3406e790746SPaolo Bonzini 3416e790746SPaolo Bonzini static void virtio_blk_handle_request(VirtIOBlockReq *req, 3426e790746SPaolo Bonzini MultiReqBuffer *mrb) 3436e790746SPaolo Bonzini { 3446e790746SPaolo Bonzini uint32_t type; 3456e790746SPaolo Bonzini 3466e790746SPaolo Bonzini if (req->elem.out_num < 1 || req->elem.in_num < 1) { 3476e790746SPaolo Bonzini error_report("virtio-blk missing headers"); 3486e790746SPaolo Bonzini exit(1); 3496e790746SPaolo Bonzini } 3506e790746SPaolo Bonzini 3516e790746SPaolo Bonzini if (req->elem.out_sg[0].iov_len < sizeof(*req->out) || 3526e790746SPaolo Bonzini req->elem.in_sg[req->elem.in_num - 1].iov_len < sizeof(*req->in)) { 3536e790746SPaolo Bonzini error_report("virtio-blk header not in correct element"); 3546e790746SPaolo Bonzini exit(1); 3556e790746SPaolo Bonzini } 3566e790746SPaolo Bonzini 3576e790746SPaolo Bonzini req->out = (void *)req->elem.out_sg[0].iov_base; 3586e790746SPaolo Bonzini req->in = (void *)req->elem.in_sg[req->elem.in_num - 1].iov_base; 3596e790746SPaolo Bonzini 3606e790746SPaolo Bonzini type = ldl_p(&req->out->type); 3616e790746SPaolo Bonzini 3626e790746SPaolo Bonzini if (type & VIRTIO_BLK_T_FLUSH) { 3636e790746SPaolo Bonzini virtio_blk_handle_flush(req, mrb); 3646e790746SPaolo Bonzini } else if (type & VIRTIO_BLK_T_SCSI_CMD) { 3656e790746SPaolo Bonzini virtio_blk_handle_scsi(req); 3666e790746SPaolo Bonzini } else if (type & VIRTIO_BLK_T_GET_ID) { 3676e790746SPaolo Bonzini VirtIOBlock *s = req->dev; 3686e790746SPaolo Bonzini 3696e790746SPaolo Bonzini /* 3706e790746SPaolo Bonzini * NB: per existing s/n string convention the string is 3716e790746SPaolo Bonzini * terminated by '\0' only when shorter than buffer. 3726e790746SPaolo Bonzini */ 3736e790746SPaolo Bonzini strncpy(req->elem.in_sg[0].iov_base, 3746e790746SPaolo Bonzini s->blk.serial ? s->blk.serial : "", 3756e790746SPaolo Bonzini MIN(req->elem.in_sg[0].iov_len, VIRTIO_BLK_ID_BYTES)); 3766e790746SPaolo Bonzini virtio_blk_req_complete(req, VIRTIO_BLK_S_OK); 3776e790746SPaolo Bonzini g_free(req); 3786e790746SPaolo Bonzini } else if (type & VIRTIO_BLK_T_OUT) { 3796e790746SPaolo Bonzini qemu_iovec_init_external(&req->qiov, &req->elem.out_sg[1], 3806e790746SPaolo Bonzini req->elem.out_num - 1); 3816e790746SPaolo Bonzini virtio_blk_handle_write(req, mrb); 3826e790746SPaolo Bonzini } else if (type == VIRTIO_BLK_T_IN || type == VIRTIO_BLK_T_BARRIER) { 3836e790746SPaolo Bonzini /* VIRTIO_BLK_T_IN is 0, so we can't just & it. */ 3846e790746SPaolo Bonzini qemu_iovec_init_external(&req->qiov, &req->elem.in_sg[0], 3856e790746SPaolo Bonzini req->elem.in_num - 1); 3866e790746SPaolo Bonzini virtio_blk_handle_read(req); 3876e790746SPaolo Bonzini } else { 3886e790746SPaolo Bonzini virtio_blk_req_complete(req, VIRTIO_BLK_S_UNSUPP); 3896e790746SPaolo Bonzini g_free(req); 3906e790746SPaolo Bonzini } 3916e790746SPaolo Bonzini } 3926e790746SPaolo Bonzini 3936e790746SPaolo Bonzini static void virtio_blk_handle_output(VirtIODevice *vdev, VirtQueue *vq) 3946e790746SPaolo Bonzini { 3956e790746SPaolo Bonzini VirtIOBlock *s = VIRTIO_BLK(vdev); 3966e790746SPaolo Bonzini VirtIOBlockReq *req; 3976e790746SPaolo Bonzini MultiReqBuffer mrb = { 3986e790746SPaolo Bonzini .num_writes = 0, 3996e790746SPaolo Bonzini }; 4006e790746SPaolo Bonzini 4016e790746SPaolo Bonzini #ifdef CONFIG_VIRTIO_BLK_DATA_PLANE 4026e790746SPaolo Bonzini /* Some guests kick before setting VIRTIO_CONFIG_S_DRIVER_OK so start 4036e790746SPaolo Bonzini * dataplane here instead of waiting for .set_status(). 4046e790746SPaolo Bonzini */ 4056e790746SPaolo Bonzini if (s->dataplane) { 4066e790746SPaolo Bonzini virtio_blk_data_plane_start(s->dataplane); 4076e790746SPaolo Bonzini return; 4086e790746SPaolo Bonzini } 4096e790746SPaolo Bonzini #endif 4106e790746SPaolo Bonzini 4116e790746SPaolo Bonzini while ((req = virtio_blk_get_request(s))) { 4126e790746SPaolo Bonzini virtio_blk_handle_request(req, &mrb); 4136e790746SPaolo Bonzini } 4146e790746SPaolo Bonzini 4156e790746SPaolo Bonzini virtio_submit_multiwrite(s->bs, &mrb); 4166e790746SPaolo Bonzini 4176e790746SPaolo Bonzini /* 4186e790746SPaolo Bonzini * FIXME: Want to check for completions before returning to guest mode, 4196e790746SPaolo Bonzini * so cached reads and writes are reported as quickly as possible. But 4206e790746SPaolo Bonzini * that should be done in the generic block layer. 4216e790746SPaolo Bonzini */ 4226e790746SPaolo Bonzini } 4236e790746SPaolo Bonzini 4246e790746SPaolo Bonzini static void virtio_blk_dma_restart_bh(void *opaque) 4256e790746SPaolo Bonzini { 4266e790746SPaolo Bonzini VirtIOBlock *s = opaque; 4276e790746SPaolo Bonzini VirtIOBlockReq *req = s->rq; 4286e790746SPaolo Bonzini MultiReqBuffer mrb = { 4296e790746SPaolo Bonzini .num_writes = 0, 4306e790746SPaolo Bonzini }; 4316e790746SPaolo Bonzini 4326e790746SPaolo Bonzini qemu_bh_delete(s->bh); 4336e790746SPaolo Bonzini s->bh = NULL; 4346e790746SPaolo Bonzini 4356e790746SPaolo Bonzini s->rq = NULL; 4366e790746SPaolo Bonzini 4376e790746SPaolo Bonzini while (req) { 4386e790746SPaolo Bonzini virtio_blk_handle_request(req, &mrb); 4396e790746SPaolo Bonzini req = req->next; 4406e790746SPaolo Bonzini } 4416e790746SPaolo Bonzini 4426e790746SPaolo Bonzini virtio_submit_multiwrite(s->bs, &mrb); 4436e790746SPaolo Bonzini } 4446e790746SPaolo Bonzini 4456e790746SPaolo Bonzini static void virtio_blk_dma_restart_cb(void *opaque, int running, 4466e790746SPaolo Bonzini RunState state) 4476e790746SPaolo Bonzini { 4486e790746SPaolo Bonzini VirtIOBlock *s = opaque; 4496e790746SPaolo Bonzini 4506e790746SPaolo Bonzini if (!running) { 4516e790746SPaolo Bonzini return; 4526e790746SPaolo Bonzini } 4536e790746SPaolo Bonzini 4546e790746SPaolo Bonzini if (!s->bh) { 4556e790746SPaolo Bonzini s->bh = qemu_bh_new(virtio_blk_dma_restart_bh, s); 4566e790746SPaolo Bonzini qemu_bh_schedule(s->bh); 4576e790746SPaolo Bonzini } 4586e790746SPaolo Bonzini } 4596e790746SPaolo Bonzini 4606e790746SPaolo Bonzini static void virtio_blk_reset(VirtIODevice *vdev) 4616e790746SPaolo Bonzini { 4626e790746SPaolo Bonzini #ifdef CONFIG_VIRTIO_BLK_DATA_PLANE 4636e790746SPaolo Bonzini VirtIOBlock *s = VIRTIO_BLK(vdev); 4646e790746SPaolo Bonzini 4656e790746SPaolo Bonzini if (s->dataplane) { 4666e790746SPaolo Bonzini virtio_blk_data_plane_stop(s->dataplane); 4676e790746SPaolo Bonzini } 4686e790746SPaolo Bonzini #endif 4696e790746SPaolo Bonzini 4706e790746SPaolo Bonzini /* 4716e790746SPaolo Bonzini * This should cancel pending requests, but can't do nicely until there 4726e790746SPaolo Bonzini * are per-device request lists. 4736e790746SPaolo Bonzini */ 4746e790746SPaolo Bonzini bdrv_drain_all(); 4756e790746SPaolo Bonzini } 4766e790746SPaolo Bonzini 4776e790746SPaolo Bonzini /* coalesce internal state, copy to pci i/o region 0 4786e790746SPaolo Bonzini */ 4796e790746SPaolo Bonzini static void virtio_blk_update_config(VirtIODevice *vdev, uint8_t *config) 4806e790746SPaolo Bonzini { 4816e790746SPaolo Bonzini VirtIOBlock *s = VIRTIO_BLK(vdev); 4826e790746SPaolo Bonzini struct virtio_blk_config blkcfg; 4836e790746SPaolo Bonzini uint64_t capacity; 4846e790746SPaolo Bonzini int blk_size = s->conf->logical_block_size; 4856e790746SPaolo Bonzini 4866e790746SPaolo Bonzini bdrv_get_geometry(s->bs, &capacity); 4876e790746SPaolo Bonzini memset(&blkcfg, 0, sizeof(blkcfg)); 4886e790746SPaolo Bonzini stq_raw(&blkcfg.capacity, capacity); 4896e790746SPaolo Bonzini stl_raw(&blkcfg.seg_max, 128 - 2); 4906e790746SPaolo Bonzini stw_raw(&blkcfg.cylinders, s->conf->cyls); 4916e790746SPaolo Bonzini stl_raw(&blkcfg.blk_size, blk_size); 4926e790746SPaolo Bonzini stw_raw(&blkcfg.min_io_size, s->conf->min_io_size / blk_size); 4936e790746SPaolo Bonzini stw_raw(&blkcfg.opt_io_size, s->conf->opt_io_size / blk_size); 4946e790746SPaolo Bonzini blkcfg.heads = s->conf->heads; 4956e790746SPaolo Bonzini /* 4966e790746SPaolo Bonzini * We must ensure that the block device capacity is a multiple of 497*e03ba136SPeter Maydell * the logical block size. If that is not the case, let's use 4986e790746SPaolo Bonzini * sector_mask to adopt the geometry to have a correct picture. 4996e790746SPaolo Bonzini * For those devices where the capacity is ok for the given geometry 500*e03ba136SPeter Maydell * we don't touch the sector value of the geometry, since some devices 5016e790746SPaolo Bonzini * (like s390 dasd) need a specific value. Here the capacity is already 5026e790746SPaolo Bonzini * cyls*heads*secs*blk_size and the sector value is not block size 5036e790746SPaolo Bonzini * divided by 512 - instead it is the amount of blk_size blocks 5046e790746SPaolo Bonzini * per track (cylinder). 5056e790746SPaolo Bonzini */ 5066e790746SPaolo Bonzini if (bdrv_getlength(s->bs) / s->conf->heads / s->conf->secs % blk_size) { 5076e790746SPaolo Bonzini blkcfg.sectors = s->conf->secs & ~s->sector_mask; 5086e790746SPaolo Bonzini } else { 5096e790746SPaolo Bonzini blkcfg.sectors = s->conf->secs; 5106e790746SPaolo Bonzini } 5116e790746SPaolo Bonzini blkcfg.size_max = 0; 5126e790746SPaolo Bonzini blkcfg.physical_block_exp = get_physical_block_exp(s->conf); 5136e790746SPaolo Bonzini blkcfg.alignment_offset = 0; 5146e790746SPaolo Bonzini blkcfg.wce = bdrv_enable_write_cache(s->bs); 5156e790746SPaolo Bonzini memcpy(config, &blkcfg, sizeof(struct virtio_blk_config)); 5166e790746SPaolo Bonzini } 5176e790746SPaolo Bonzini 5186e790746SPaolo Bonzini static void virtio_blk_set_config(VirtIODevice *vdev, const uint8_t *config) 5196e790746SPaolo Bonzini { 5206e790746SPaolo Bonzini VirtIOBlock *s = VIRTIO_BLK(vdev); 5216e790746SPaolo Bonzini struct virtio_blk_config blkcfg; 5226e790746SPaolo Bonzini 5236e790746SPaolo Bonzini memcpy(&blkcfg, config, sizeof(blkcfg)); 5246e790746SPaolo Bonzini bdrv_set_enable_write_cache(s->bs, blkcfg.wce != 0); 5256e790746SPaolo Bonzini } 5266e790746SPaolo Bonzini 5276e790746SPaolo Bonzini static uint32_t virtio_blk_get_features(VirtIODevice *vdev, uint32_t features) 5286e790746SPaolo Bonzini { 5296e790746SPaolo Bonzini VirtIOBlock *s = VIRTIO_BLK(vdev); 5306e790746SPaolo Bonzini 5316e790746SPaolo Bonzini features |= (1 << VIRTIO_BLK_F_SEG_MAX); 5326e790746SPaolo Bonzini features |= (1 << VIRTIO_BLK_F_GEOMETRY); 5336e790746SPaolo Bonzini features |= (1 << VIRTIO_BLK_F_TOPOLOGY); 5346e790746SPaolo Bonzini features |= (1 << VIRTIO_BLK_F_BLK_SIZE); 5356e790746SPaolo Bonzini features |= (1 << VIRTIO_BLK_F_SCSI); 5366e790746SPaolo Bonzini 5376e790746SPaolo Bonzini if (s->blk.config_wce) { 5386e790746SPaolo Bonzini features |= (1 << VIRTIO_BLK_F_CONFIG_WCE); 5396e790746SPaolo Bonzini } 5406e790746SPaolo Bonzini if (bdrv_enable_write_cache(s->bs)) 5416e790746SPaolo Bonzini features |= (1 << VIRTIO_BLK_F_WCE); 5426e790746SPaolo Bonzini 5436e790746SPaolo Bonzini if (bdrv_is_read_only(s->bs)) 5446e790746SPaolo Bonzini features |= 1 << VIRTIO_BLK_F_RO; 5456e790746SPaolo Bonzini 5466e790746SPaolo Bonzini return features; 5476e790746SPaolo Bonzini } 5486e790746SPaolo Bonzini 5496e790746SPaolo Bonzini static void virtio_blk_set_status(VirtIODevice *vdev, uint8_t status) 5506e790746SPaolo Bonzini { 5516e790746SPaolo Bonzini VirtIOBlock *s = VIRTIO_BLK(vdev); 5526e790746SPaolo Bonzini uint32_t features; 5536e790746SPaolo Bonzini 5546e790746SPaolo Bonzini #ifdef CONFIG_VIRTIO_BLK_DATA_PLANE 5556e790746SPaolo Bonzini if (s->dataplane && !(status & (VIRTIO_CONFIG_S_DRIVER | 5566e790746SPaolo Bonzini VIRTIO_CONFIG_S_DRIVER_OK))) { 5576e790746SPaolo Bonzini virtio_blk_data_plane_stop(s->dataplane); 5586e790746SPaolo Bonzini } 5596e790746SPaolo Bonzini #endif 5606e790746SPaolo Bonzini 5616e790746SPaolo Bonzini if (!(status & VIRTIO_CONFIG_S_DRIVER_OK)) { 5626e790746SPaolo Bonzini return; 5636e790746SPaolo Bonzini } 5646e790746SPaolo Bonzini 5656e790746SPaolo Bonzini features = vdev->guest_features; 5666e790746SPaolo Bonzini bdrv_set_enable_write_cache(s->bs, !!(features & (1 << VIRTIO_BLK_F_WCE))); 5676e790746SPaolo Bonzini } 5686e790746SPaolo Bonzini 5696e790746SPaolo Bonzini static void virtio_blk_save(QEMUFile *f, void *opaque) 5706e790746SPaolo Bonzini { 5716e790746SPaolo Bonzini VirtIOBlock *s = opaque; 5726e790746SPaolo Bonzini VirtIODevice *vdev = VIRTIO_DEVICE(s); 5736e790746SPaolo Bonzini VirtIOBlockReq *req = s->rq; 5746e790746SPaolo Bonzini 5756e790746SPaolo Bonzini virtio_save(vdev, f); 5766e790746SPaolo Bonzini 5776e790746SPaolo Bonzini while (req) { 5786e790746SPaolo Bonzini qemu_put_sbyte(f, 1); 5796e790746SPaolo Bonzini qemu_put_buffer(f, (unsigned char*)&req->elem, sizeof(req->elem)); 5806e790746SPaolo Bonzini req = req->next; 5816e790746SPaolo Bonzini } 5826e790746SPaolo Bonzini qemu_put_sbyte(f, 0); 5836e790746SPaolo Bonzini } 5846e790746SPaolo Bonzini 5856e790746SPaolo Bonzini static int virtio_blk_load(QEMUFile *f, void *opaque, int version_id) 5866e790746SPaolo Bonzini { 5876e790746SPaolo Bonzini VirtIOBlock *s = opaque; 5886e790746SPaolo Bonzini VirtIODevice *vdev = VIRTIO_DEVICE(s); 5896e790746SPaolo Bonzini int ret; 5906e790746SPaolo Bonzini 5916e790746SPaolo Bonzini if (version_id != 2) 5926e790746SPaolo Bonzini return -EINVAL; 5936e790746SPaolo Bonzini 5946e790746SPaolo Bonzini ret = virtio_load(vdev, f); 5956e790746SPaolo Bonzini if (ret) { 5966e790746SPaolo Bonzini return ret; 5976e790746SPaolo Bonzini } 5986e790746SPaolo Bonzini 5996e790746SPaolo Bonzini while (qemu_get_sbyte(f)) { 6006e790746SPaolo Bonzini VirtIOBlockReq *req = virtio_blk_alloc_request(s); 6016e790746SPaolo Bonzini qemu_get_buffer(f, (unsigned char*)&req->elem, sizeof(req->elem)); 6026e790746SPaolo Bonzini req->next = s->rq; 6036e790746SPaolo Bonzini s->rq = req; 6046e790746SPaolo Bonzini 6056e790746SPaolo Bonzini virtqueue_map_sg(req->elem.in_sg, req->elem.in_addr, 6066e790746SPaolo Bonzini req->elem.in_num, 1); 6076e790746SPaolo Bonzini virtqueue_map_sg(req->elem.out_sg, req->elem.out_addr, 6086e790746SPaolo Bonzini req->elem.out_num, 0); 6096e790746SPaolo Bonzini } 6106e790746SPaolo Bonzini 6116e790746SPaolo Bonzini return 0; 6126e790746SPaolo Bonzini } 6136e790746SPaolo Bonzini 6146e790746SPaolo Bonzini static void virtio_blk_resize(void *opaque) 6156e790746SPaolo Bonzini { 6166e790746SPaolo Bonzini VirtIODevice *vdev = VIRTIO_DEVICE(opaque); 6176e790746SPaolo Bonzini 6186e790746SPaolo Bonzini virtio_notify_config(vdev); 6196e790746SPaolo Bonzini } 6206e790746SPaolo Bonzini 6216e790746SPaolo Bonzini static const BlockDevOps virtio_block_ops = { 6226e790746SPaolo Bonzini .resize_cb = virtio_blk_resize, 6236e790746SPaolo Bonzini }; 6246e790746SPaolo Bonzini 6256e790746SPaolo Bonzini void virtio_blk_set_conf(DeviceState *dev, VirtIOBlkConf *blk) 6266e790746SPaolo Bonzini { 6276e790746SPaolo Bonzini VirtIOBlock *s = VIRTIO_BLK(dev); 6286e790746SPaolo Bonzini memcpy(&(s->blk), blk, sizeof(struct VirtIOBlkConf)); 6296e790746SPaolo Bonzini } 6306e790746SPaolo Bonzini 6316e790746SPaolo Bonzini static int virtio_blk_device_init(VirtIODevice *vdev) 6326e790746SPaolo Bonzini { 6336e790746SPaolo Bonzini DeviceState *qdev = DEVICE(vdev); 6346e790746SPaolo Bonzini VirtIOBlock *s = VIRTIO_BLK(vdev); 6356e790746SPaolo Bonzini VirtIOBlkConf *blk = &(s->blk); 6366e790746SPaolo Bonzini static int virtio_blk_id; 6376e790746SPaolo Bonzini 6386e790746SPaolo Bonzini if (!blk->conf.bs) { 6396e790746SPaolo Bonzini error_report("drive property not set"); 6406e790746SPaolo Bonzini return -1; 6416e790746SPaolo Bonzini } 6426e790746SPaolo Bonzini if (!bdrv_is_inserted(blk->conf.bs)) { 6436e790746SPaolo Bonzini error_report("Device needs media, but drive is empty"); 6446e790746SPaolo Bonzini return -1; 6456e790746SPaolo Bonzini } 6466e790746SPaolo Bonzini 6476e790746SPaolo Bonzini blkconf_serial(&blk->conf, &blk->serial); 6486e790746SPaolo Bonzini if (blkconf_geometry(&blk->conf, NULL, 65535, 255, 255) < 0) { 6496e790746SPaolo Bonzini return -1; 6506e790746SPaolo Bonzini } 6516e790746SPaolo Bonzini 6526e790746SPaolo Bonzini virtio_init(vdev, "virtio-blk", VIRTIO_ID_BLOCK, 6536e790746SPaolo Bonzini sizeof(struct virtio_blk_config)); 6546e790746SPaolo Bonzini 6556e790746SPaolo Bonzini vdev->get_config = virtio_blk_update_config; 6566e790746SPaolo Bonzini vdev->set_config = virtio_blk_set_config; 6576e790746SPaolo Bonzini vdev->get_features = virtio_blk_get_features; 6586e790746SPaolo Bonzini vdev->set_status = virtio_blk_set_status; 6596e790746SPaolo Bonzini vdev->reset = virtio_blk_reset; 6606e790746SPaolo Bonzini s->bs = blk->conf.bs; 6616e790746SPaolo Bonzini s->conf = &blk->conf; 6626e790746SPaolo Bonzini memcpy(&(s->blk), blk, sizeof(struct VirtIOBlkConf)); 6636e790746SPaolo Bonzini s->rq = NULL; 6646e790746SPaolo Bonzini s->sector_mask = (s->conf->logical_block_size / BDRV_SECTOR_SIZE) - 1; 6656e790746SPaolo Bonzini 6666e790746SPaolo Bonzini s->vq = virtio_add_queue(vdev, 128, virtio_blk_handle_output); 6676e790746SPaolo Bonzini #ifdef CONFIG_VIRTIO_BLK_DATA_PLANE 6686e790746SPaolo Bonzini if (!virtio_blk_data_plane_create(vdev, blk, &s->dataplane)) { 6696e790746SPaolo Bonzini virtio_common_cleanup(vdev); 6706e790746SPaolo Bonzini return -1; 6716e790746SPaolo Bonzini } 6726e790746SPaolo Bonzini #endif 6736e790746SPaolo Bonzini 6746e790746SPaolo Bonzini s->change = qemu_add_vm_change_state_handler(virtio_blk_dma_restart_cb, s); 6756e790746SPaolo Bonzini register_savevm(qdev, "virtio-blk", virtio_blk_id++, 2, 6766e790746SPaolo Bonzini virtio_blk_save, virtio_blk_load, s); 6776e790746SPaolo Bonzini bdrv_set_dev_ops(s->bs, &virtio_block_ops, s); 6786e790746SPaolo Bonzini bdrv_set_buffer_alignment(s->bs, s->conf->logical_block_size); 6796e790746SPaolo Bonzini 6806e790746SPaolo Bonzini bdrv_iostatus_enable(s->bs); 6816e790746SPaolo Bonzini 6826e790746SPaolo Bonzini add_boot_device_path(s->conf->bootindex, qdev, "/disk@0,0"); 6836e790746SPaolo Bonzini return 0; 6846e790746SPaolo Bonzini } 6856e790746SPaolo Bonzini 6866e790746SPaolo Bonzini static int virtio_blk_device_exit(DeviceState *dev) 6876e790746SPaolo Bonzini { 6886e790746SPaolo Bonzini VirtIODevice *vdev = VIRTIO_DEVICE(dev); 6896e790746SPaolo Bonzini VirtIOBlock *s = VIRTIO_BLK(dev); 6906e790746SPaolo Bonzini #ifdef CONFIG_VIRTIO_BLK_DATA_PLANE 6916e790746SPaolo Bonzini virtio_blk_data_plane_destroy(s->dataplane); 6926e790746SPaolo Bonzini s->dataplane = NULL; 6936e790746SPaolo Bonzini #endif 6946e790746SPaolo Bonzini qemu_del_vm_change_state_handler(s->change); 6956e790746SPaolo Bonzini unregister_savevm(dev, "virtio-blk", s); 6966e790746SPaolo Bonzini blockdev_mark_auto_del(s->bs); 6976e790746SPaolo Bonzini virtio_common_cleanup(vdev); 6986e790746SPaolo Bonzini return 0; 6996e790746SPaolo Bonzini } 7006e790746SPaolo Bonzini 7016e790746SPaolo Bonzini static Property virtio_blk_properties[] = { 7026e790746SPaolo Bonzini DEFINE_VIRTIO_BLK_PROPERTIES(VirtIOBlock, blk), 7036e790746SPaolo Bonzini DEFINE_PROP_END_OF_LIST(), 7046e790746SPaolo Bonzini }; 7056e790746SPaolo Bonzini 7066e790746SPaolo Bonzini static void virtio_blk_class_init(ObjectClass *klass, void *data) 7076e790746SPaolo Bonzini { 7086e790746SPaolo Bonzini DeviceClass *dc = DEVICE_CLASS(klass); 7096e790746SPaolo Bonzini VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); 7106e790746SPaolo Bonzini dc->exit = virtio_blk_device_exit; 7116e790746SPaolo Bonzini dc->props = virtio_blk_properties; 7126e790746SPaolo Bonzini vdc->init = virtio_blk_device_init; 7136e790746SPaolo Bonzini vdc->get_config = virtio_blk_update_config; 7146e790746SPaolo Bonzini vdc->set_config = virtio_blk_set_config; 7156e790746SPaolo Bonzini vdc->get_features = virtio_blk_get_features; 7166e790746SPaolo Bonzini vdc->set_status = virtio_blk_set_status; 7176e790746SPaolo Bonzini vdc->reset = virtio_blk_reset; 7186e790746SPaolo Bonzini } 7196e790746SPaolo Bonzini 7206e790746SPaolo Bonzini static const TypeInfo virtio_device_info = { 7216e790746SPaolo Bonzini .name = TYPE_VIRTIO_BLK, 7226e790746SPaolo Bonzini .parent = TYPE_VIRTIO_DEVICE, 7236e790746SPaolo Bonzini .instance_size = sizeof(VirtIOBlock), 7246e790746SPaolo Bonzini .class_init = virtio_blk_class_init, 7256e790746SPaolo Bonzini }; 7266e790746SPaolo Bonzini 7276e790746SPaolo Bonzini static void virtio_register_types(void) 7286e790746SPaolo Bonzini { 7296e790746SPaolo Bonzini type_register_static(&virtio_device_info); 7306e790746SPaolo Bonzini } 7316e790746SPaolo Bonzini 7326e790746SPaolo Bonzini type_init(virtio_register_types) 733