diff mbox series

[15/16] hw/block/nvme: remove NvmeCmd parameter

Message ID 20200720113748.322965-16-its@irrelevant.dk
State New
Headers show
Series hw/block/nvme: dma handling and address mapping cleanup | expand

Commit Message

Klaus Jensen July 20, 2020, 11:37 a.m. UTC
From: Klaus Jensen <k.jensen@samsung.com>

Keep a copy of the raw nvme command in the NvmeRequest and remove the
now redundant NvmeCmd parameter.

Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
---
 hw/block/nvme.c | 177 +++++++++++++++++++++++++-----------------------
 hw/block/nvme.h |   1 +
 2 files changed, 93 insertions(+), 85 deletions(-)

Comments

Minwoo Im July 29, 2020, 4:10 p.m. UTC | #1
On 20-07-20 13:37:47, Klaus Jensen wrote:
> From: Klaus Jensen <k.jensen@samsung.com>
> 
> Keep a copy of the raw nvme command in the NvmeRequest and remove the
> now redundant NvmeCmd parameter.
> 
> Signed-off-by: Klaus Jensen <k.jensen@samsung.com>

I would really have suggested this change from 13th patch!

Reviewed-by: Minwoo Im <minwoo.im.dev@gmail.com>

Thanks,
Maxim Levitsky July 29, 2020, 6:25 p.m. UTC | #2
On Mon, 2020-07-20 at 13:37 +0200, Klaus Jensen wrote:
> From: Klaus Jensen <k.jensen@samsung.com>
> 
> Keep a copy of the raw nvme command in the NvmeRequest and remove the
> now redundant NvmeCmd parameter.

Shouldn't you clear the req->cmd in nvme_req_clear too for consistency?

Other than that looks OK, but I might have missed something.

Best regards,
	Maxim Levitsky
> 
> Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
> ---
>  hw/block/nvme.c | 177 +++++++++++++++++++++++++-----------------------
>  hw/block/nvme.h |   1 +
>  2 files changed, 93 insertions(+), 85 deletions(-)
> 
> diff --git a/hw/block/nvme.c b/hw/block/nvme.c
> index b53afdeb3fb6..0b3dceccc89b 100644
> --- a/hw/block/nvme.c
> +++ b/hw/block/nvme.c
> @@ -425,9 +425,9 @@ static uint16_t nvme_dma_prp(NvmeCtrl *n, uint8_t *ptr, uint32_t len,
>      return status;
>  }
>  
> -static uint16_t nvme_map(NvmeCtrl *n, NvmeCmd *cmd, size_t len,
> -                         NvmeRequest *req)
> +static uint16_t nvme_map(NvmeCtrl *n, size_t len, NvmeRequest *req)
>  {
> +    NvmeCmd *cmd = &req->cmd;
>      uint64_t prp1 = le64_to_cpu(cmd->dptr.prp1);
>      uint64_t prp2 = le64_to_cpu(cmd->dptr.prp2);
>  
> @@ -597,7 +597,7 @@ static void nvme_rw_cb(void *opaque, int ret)
>      nvme_enqueue_req_completion(cq, req);
>  }
>  
> -static uint16_t nvme_flush(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
> +static uint16_t nvme_flush(NvmeCtrl *n, NvmeRequest *req)
>  {
>      block_acct_start(blk_get_stats(n->conf.blk), &req->acct, 0,
>           BLOCK_ACCT_FLUSH);
> @@ -606,9 +606,9 @@ static uint16_t nvme_flush(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
>      return NVME_NO_COMPLETE;
>  }
>  
> -static uint16_t nvme_write_zeroes(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
> +static uint16_t nvme_write_zeroes(NvmeCtrl *n, NvmeRequest *req)
>  {
> -    NvmeRwCmd *rw = (NvmeRwCmd *)cmd;
> +    NvmeRwCmd *rw = (NvmeRwCmd *)&req->cmd;
>      NvmeNamespace *ns = req->ns;
>      const uint8_t lba_index = NVME_ID_NS_FLBAS_INDEX(ns->id_ns.flbas);
>      const uint8_t data_shift = ns->id_ns.lbaf[lba_index].ds;
> @@ -633,9 +633,9 @@ static uint16_t nvme_write_zeroes(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
>      return NVME_NO_COMPLETE;
>  }
>  
> -static uint16_t nvme_rw(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
> +static uint16_t nvme_rw(NvmeCtrl *n, NvmeRequest *req)
>  {
> -    NvmeRwCmd *rw = (NvmeRwCmd *)cmd;
> +    NvmeRwCmd *rw = (NvmeRwCmd *)&req->cmd;
>      NvmeNamespace *ns = req->ns;
>      uint32_t nlb  = le32_to_cpu(rw->nlb) + 1;
>      uint64_t slba = le64_to_cpu(rw->slba);
> @@ -664,7 +664,7 @@ static uint16_t nvme_rw(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
>          return status;
>      }
>  
> -    if (nvme_map(n, cmd, data_size, req)) {
> +    if (nvme_map(n, data_size, req)) {
>          block_acct_invalid(blk_get_stats(n->conf.blk), acct);
>          return NVME_INVALID_FIELD | NVME_DNR;
>      }
> @@ -690,11 +690,12 @@ static uint16_t nvme_rw(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
>      return NVME_NO_COMPLETE;
>  }
>  
> -static uint16_t nvme_io_cmd(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
> +static uint16_t nvme_io_cmd(NvmeCtrl *n, NvmeRequest *req)
>  {
> -    uint32_t nsid = le32_to_cpu(cmd->nsid);
> +    uint32_t nsid = le32_to_cpu(req->cmd.nsid);
>  
> -    trace_pci_nvme_io_cmd(nvme_cid(req), nsid, nvme_sqid(req), cmd->opcode);
> +    trace_pci_nvme_io_cmd(nvme_cid(req), nsid, nvme_sqid(req),
> +                          req->cmd.opcode);
>  
>      if (unlikely(nsid == 0 || nsid > n->num_namespaces)) {
>          trace_pci_nvme_err_invalid_ns(nsid, n->num_namespaces);
> @@ -702,16 +703,16 @@ static uint16_t nvme_io_cmd(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
>      }
>  
>      req->ns = &n->namespaces[nsid - 1];
> -    switch (cmd->opcode) {
> +    switch (req->cmd.opcode) {
>      case NVME_CMD_FLUSH:
> -        return nvme_flush(n, cmd, req);
> +        return nvme_flush(n, req);
>      case NVME_CMD_WRITE_ZEROES:
> -        return nvme_write_zeroes(n, cmd, req);
> +        return nvme_write_zeroes(n, req);
>      case NVME_CMD_WRITE:
>      case NVME_CMD_READ:
> -        return nvme_rw(n, cmd, req);
> +        return nvme_rw(n, req);
>      default:
> -        trace_pci_nvme_err_invalid_opc(cmd->opcode);
> +        trace_pci_nvme_err_invalid_opc(req->cmd.opcode);
>          return NVME_INVALID_OPCODE | NVME_DNR;
>      }
>  }
> @@ -727,10 +728,10 @@ static void nvme_free_sq(NvmeSQueue *sq, NvmeCtrl *n)
>      }
>  }
>  
> -static uint16_t nvme_del_sq(NvmeCtrl *n, NvmeCmd *cmd)
> +static uint16_t nvme_del_sq(NvmeCtrl *n, NvmeRequest *req)
>  {
> -    NvmeDeleteQ *c = (NvmeDeleteQ *)cmd;
> -    NvmeRequest *req, *next;
> +    NvmeDeleteQ *c = (NvmeDeleteQ *)&req->cmd;
> +    NvmeRequest *r, *next;
>      NvmeSQueue *sq;
>      NvmeCQueue *cq;
>      uint16_t qid = le16_to_cpu(c->qid);
> @@ -744,19 +745,19 @@ static uint16_t nvme_del_sq(NvmeCtrl *n, NvmeCmd *cmd)
>  
>      sq = n->sq[qid];
>      while (!QTAILQ_EMPTY(&sq->out_req_list)) {
> -        req = QTAILQ_FIRST(&sq->out_req_list);
> -        assert(req->aiocb);
> -        blk_aio_cancel(req->aiocb);
> +        r = QTAILQ_FIRST(&sq->out_req_list);
> +        assert(r->aiocb);
> +        blk_aio_cancel(r->aiocb);
>      }
>      if (!nvme_check_cqid(n, sq->cqid)) {
>          cq = n->cq[sq->cqid];
>          QTAILQ_REMOVE(&cq->sq_list, sq, entry);
>  
>          nvme_post_cqes(cq);
> -        QTAILQ_FOREACH_SAFE(req, &cq->req_list, entry, next) {
> -            if (req->sq == sq) {
> -                QTAILQ_REMOVE(&cq->req_list, req, entry);
> -                QTAILQ_INSERT_TAIL(&sq->req_list, req, entry);
> +        QTAILQ_FOREACH_SAFE(r, &cq->req_list, entry, next) {
> +            if (r->sq == sq) {
> +                QTAILQ_REMOVE(&cq->req_list, r, entry);
> +                QTAILQ_INSERT_TAIL(&sq->req_list, r, entry);
>              }
>          }
>      }
> @@ -793,10 +794,10 @@ static void nvme_init_sq(NvmeSQueue *sq, NvmeCtrl *n, uint64_t dma_addr,
>      n->sq[sqid] = sq;
>  }
>  
> -static uint16_t nvme_create_sq(NvmeCtrl *n, NvmeCmd *cmd)
> +static uint16_t nvme_create_sq(NvmeCtrl *n, NvmeRequest *req)
>  {
>      NvmeSQueue *sq;
> -    NvmeCreateSq *c = (NvmeCreateSq *)cmd;
> +    NvmeCreateSq *c = (NvmeCreateSq *)&req->cmd;
>  
>      uint16_t cqid = le16_to_cpu(c->cqid);
>      uint16_t sqid = le16_to_cpu(c->sqid);
> @@ -831,10 +832,10 @@ static uint16_t nvme_create_sq(NvmeCtrl *n, NvmeCmd *cmd)
>      return NVME_SUCCESS;
>  }
>  
> -static uint16_t nvme_smart_info(NvmeCtrl *n, NvmeCmd *cmd, uint8_t rae,
> -                                uint32_t buf_len, uint64_t off,
> -                                NvmeRequest *req)
> +static uint16_t nvme_smart_info(NvmeCtrl *n, uint8_t rae, uint32_t buf_len,
> +                                uint64_t off, NvmeRequest *req)
>  {
> +    NvmeCmd *cmd = &req->cmd;
>      uint64_t prp1 = le64_to_cpu(cmd->dptr.prp1);
>      uint64_t prp2 = le64_to_cpu(cmd->dptr.prp2);
>      uint32_t nsid = le32_to_cpu(cmd->nsid);
> @@ -889,10 +890,11 @@ static uint16_t nvme_smart_info(NvmeCtrl *n, NvmeCmd *cmd, uint8_t rae,
>                          DMA_DIRECTION_FROM_DEVICE, req);
>  }
>  
> -static uint16_t nvme_fw_log_info(NvmeCtrl *n, NvmeCmd *cmd, uint32_t buf_len,
> -                                 uint64_t off, NvmeRequest *req)
> +static uint16_t nvme_fw_log_info(NvmeCtrl *n, uint32_t buf_len, uint64_t off,
> +                                 NvmeRequest *req)
>  {
>      uint32_t trans_len;
> +    NvmeCmd *cmd = &req->cmd;
>      uint64_t prp1 = le64_to_cpu(cmd->dptr.prp1);
>      uint64_t prp2 = le64_to_cpu(cmd->dptr.prp2);
>      NvmeFwSlotInfoLog fw_log = {
> @@ -911,11 +913,11 @@ static uint16_t nvme_fw_log_info(NvmeCtrl *n, NvmeCmd *cmd, uint32_t buf_len,
>                          DMA_DIRECTION_FROM_DEVICE, req);
>  }
>  
> -static uint16_t nvme_error_info(NvmeCtrl *n, NvmeCmd *cmd, uint8_t rae,
> -                                uint32_t buf_len, uint64_t off,
> -                                NvmeRequest *req)
> +static uint16_t nvme_error_info(NvmeCtrl *n, uint8_t rae, uint32_t buf_len,
> +                                uint64_t off, NvmeRequest *req)
>  {
>      uint32_t trans_len;
> +    NvmeCmd *cmd = &req->cmd;
>      uint64_t prp1 = le64_to_cpu(cmd->dptr.prp1);
>      uint64_t prp2 = le64_to_cpu(cmd->dptr.prp2);
>      NvmeErrorLog errlog;
> @@ -936,8 +938,10 @@ static uint16_t nvme_error_info(NvmeCtrl *n, NvmeCmd *cmd, uint8_t rae,
>                          DMA_DIRECTION_FROM_DEVICE, req);
>  }
>  
> -static uint16_t nvme_get_log(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
> +static uint16_t nvme_get_log(NvmeCtrl *n, NvmeRequest *req)
>  {
> +    NvmeCmd *cmd = &req->cmd;
> +
>      uint32_t dw10 = le32_to_cpu(cmd->cdw10);
>      uint32_t dw11 = le32_to_cpu(cmd->cdw11);
>      uint32_t dw12 = le32_to_cpu(cmd->cdw12);
> @@ -972,11 +976,11 @@ static uint16_t nvme_get_log(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
>  
>      switch (lid) {
>      case NVME_LOG_ERROR_INFO:
> -        return nvme_error_info(n, cmd, rae, len, off, req);
> +        return nvme_error_info(n, rae, len, off, req);
>      case NVME_LOG_SMART_INFO:
> -        return nvme_smart_info(n, cmd, rae, len, off, req);
> +        return nvme_smart_info(n, rae, len, off, req);
>      case NVME_LOG_FW_SLOT_INFO:
> -        return nvme_fw_log_info(n, cmd, len, off, req);
> +        return nvme_fw_log_info(n, len, off, req);
>      default:
>          trace_pci_nvme_err_invalid_log_page(nvme_cid(req), lid);
>          return NVME_INVALID_FIELD | NVME_DNR;
> @@ -994,9 +998,9 @@ static void nvme_free_cq(NvmeCQueue *cq, NvmeCtrl *n)
>      }
>  }
>  
> -static uint16_t nvme_del_cq(NvmeCtrl *n, NvmeCmd *cmd)
> +static uint16_t nvme_del_cq(NvmeCtrl *n, NvmeRequest *req)
>  {
> -    NvmeDeleteQ *c = (NvmeDeleteQ *)cmd;
> +    NvmeDeleteQ *c = (NvmeDeleteQ *)&req->cmd;
>      NvmeCQueue *cq;
>      uint16_t qid = le16_to_cpu(c->qid);
>  
> @@ -1037,10 +1041,10 @@ static void nvme_init_cq(NvmeCQueue *cq, NvmeCtrl *n, uint64_t dma_addr,
>      cq->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, nvme_post_cqes, cq);
>  }
>  
> -static uint16_t nvme_create_cq(NvmeCtrl *n, NvmeCmd *cmd)
> +static uint16_t nvme_create_cq(NvmeCtrl *n, NvmeRequest *req)
>  {
>      NvmeCQueue *cq;
> -    NvmeCreateCq *c = (NvmeCreateCq *)cmd;
> +    NvmeCreateCq *c = (NvmeCreateCq *)&req->cmd;
>      uint16_t cqid = le16_to_cpu(c->cqid);
>      uint16_t vector = le16_to_cpu(c->irq_vector);
>      uint16_t qsize = le16_to_cpu(c->qsize);
> @@ -1088,9 +1092,9 @@ static uint16_t nvme_create_cq(NvmeCtrl *n, NvmeCmd *cmd)
>      return NVME_SUCCESS;
>  }
>  
> -static uint16_t nvme_identify_ctrl(NvmeCtrl *n, NvmeIdentify *c,
> -                                   NvmeRequest *req)
> +static uint16_t nvme_identify_ctrl(NvmeCtrl *n, NvmeRequest *req)
>  {
> +    NvmeIdentify *c = (NvmeIdentify *)&req->cmd;
>      uint64_t prp1 = le64_to_cpu(c->prp1);
>      uint64_t prp2 = le64_to_cpu(c->prp2);
>  
> @@ -1100,10 +1104,10 @@ static uint16_t nvme_identify_ctrl(NvmeCtrl *n, NvmeIdentify *c,
>                          prp2, DMA_DIRECTION_FROM_DEVICE, req);
>  }
>  
> -static uint16_t nvme_identify_ns(NvmeCtrl *n, NvmeIdentify *c,
> -                                 NvmeRequest *req)
> +static uint16_t nvme_identify_ns(NvmeCtrl *n, NvmeRequest *req)
>  {
>      NvmeNamespace *ns;
> +    NvmeIdentify *c = (NvmeIdentify *)&req->cmd;
>      uint32_t nsid = le32_to_cpu(c->nsid);
>      uint64_t prp1 = le64_to_cpu(c->prp1);
>      uint64_t prp2 = le64_to_cpu(c->prp2);
> @@ -1121,9 +1125,9 @@ static uint16_t nvme_identify_ns(NvmeCtrl *n, NvmeIdentify *c,
>                          prp2, DMA_DIRECTION_FROM_DEVICE, req);
>  }
>  
> -static uint16_t nvme_identify_nslist(NvmeCtrl *n, NvmeIdentify *c,
> -                                     NvmeRequest *req)
> +static uint16_t nvme_identify_nslist(NvmeCtrl *n, NvmeRequest *req)
>  {
> +    NvmeIdentify *c = (NvmeIdentify *)&req->cmd;
>      static const int data_len = NVME_IDENTIFY_DATA_SIZE;
>      uint32_t min_nsid = le32_to_cpu(c->nsid);
>      uint64_t prp1 = le64_to_cpu(c->prp1);
> @@ -1160,9 +1164,9 @@ static uint16_t nvme_identify_nslist(NvmeCtrl *n, NvmeIdentify *c,
>      return ret;
>  }
>  
> -static uint16_t nvme_identify_ns_descr_list(NvmeCtrl *n, NvmeIdentify *c,
> -                                            NvmeRequest *req)
> +static uint16_t nvme_identify_ns_descr_list(NvmeCtrl *n, NvmeRequest *req)
>  {
> +    NvmeIdentify *c = (NvmeIdentify *)&req->cmd;
>      uint32_t nsid = le32_to_cpu(c->nsid);
>      uint64_t prp1 = le64_to_cpu(c->prp1);
>      uint64_t prp2 = le64_to_cpu(c->prp2);
> @@ -1201,28 +1205,28 @@ static uint16_t nvme_identify_ns_descr_list(NvmeCtrl *n, NvmeIdentify *c,
>                          DMA_DIRECTION_FROM_DEVICE, req);
>  }
>  
> -static uint16_t nvme_identify(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
> +static uint16_t nvme_identify(NvmeCtrl *n, NvmeRequest *req)
>  {
> -    NvmeIdentify *c = (NvmeIdentify *)cmd;
> +    NvmeIdentify *c = (NvmeIdentify *)&req->cmd;
>  
>      switch (le32_to_cpu(c->cns)) {
>      case NVME_ID_CNS_NS:
> -        return nvme_identify_ns(n, c, req);
> +        return nvme_identify_ns(n, req);
>      case NVME_ID_CNS_CTRL:
> -        return nvme_identify_ctrl(n, c, req);
> +        return nvme_identify_ctrl(n, req);
>      case NVME_ID_CNS_NS_ACTIVE_LIST:
> -        return nvme_identify_nslist(n, c, req);
> +        return nvme_identify_nslist(n, req);
>      case NVME_ID_CNS_NS_DESCR_LIST:
> -        return nvme_identify_ns_descr_list(n, c, req);
> +        return nvme_identify_ns_descr_list(n, req);
>      default:
>          trace_pci_nvme_err_invalid_identify_cns(le32_to_cpu(c->cns));
>          return NVME_INVALID_FIELD | NVME_DNR;
>      }
>  }
>  
> -static uint16_t nvme_abort(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
> +static uint16_t nvme_abort(NvmeCtrl *n, NvmeRequest *req)
>  {
> -    uint16_t sqid = le32_to_cpu(cmd->cdw10) & 0xffff;
> +    uint16_t sqid = le32_to_cpu(req->cmd.cdw10) & 0xffff;
>  
>      req->cqe.result = 1;
>      if (nvme_check_sqid(n, sqid)) {
> @@ -1272,9 +1276,9 @@ static inline uint64_t nvme_get_timestamp(const NvmeCtrl *n)
>      return cpu_to_le64(ts.all);
>  }
>  
> -static uint16_t nvme_get_feature_timestamp(NvmeCtrl *n, NvmeCmd *cmd,
> -                                           NvmeRequest *req)
> +static uint16_t nvme_get_feature_timestamp(NvmeCtrl *n, NvmeRequest *req)
>  {
> +    NvmeCmd *cmd = &req->cmd;
>      uint64_t prp1 = le64_to_cpu(cmd->dptr.prp1);
>      uint64_t prp2 = le64_to_cpu(cmd->dptr.prp2);
>  
> @@ -1284,8 +1288,9 @@ static uint16_t nvme_get_feature_timestamp(NvmeCtrl *n, NvmeCmd *cmd,
>                          prp2, DMA_DIRECTION_FROM_DEVICE, req);
>  }
>  
> -static uint16_t nvme_get_feature(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
> +static uint16_t nvme_get_feature(NvmeCtrl *n, NvmeRequest *req)
>  {
> +    NvmeCmd *cmd = &req->cmd;
>      uint32_t dw10 = le32_to_cpu(cmd->cdw10);
>      uint32_t dw11 = le32_to_cpu(cmd->cdw11);
>      uint32_t nsid = le32_to_cpu(cmd->nsid);
> @@ -1359,7 +1364,7 @@ static uint16_t nvme_get_feature(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
>          result = n->features.async_config;
>          goto out;
>      case NVME_TIMESTAMP:
> -        return nvme_get_feature_timestamp(n, cmd, req);
> +        return nvme_get_feature_timestamp(n, req);
>      default:
>          break;
>      }
> @@ -1405,11 +1410,11 @@ out:
>      return NVME_SUCCESS;
>  }
>  
> -static uint16_t nvme_set_feature_timestamp(NvmeCtrl *n, NvmeCmd *cmd,
> -                                           NvmeRequest *req)
> +static uint16_t nvme_set_feature_timestamp(NvmeCtrl *n, NvmeRequest *req)
>  {
>      uint16_t ret;
>      uint64_t timestamp;
> +    NvmeCmd *cmd = &req->cmd;
>      uint64_t prp1 = le64_to_cpu(cmd->dptr.prp1);
>      uint64_t prp2 = le64_to_cpu(cmd->dptr.prp2);
>  
> @@ -1424,8 +1429,9 @@ static uint16_t nvme_set_feature_timestamp(NvmeCtrl *n, NvmeCmd *cmd,
>      return NVME_SUCCESS;
>  }
>  
> -static uint16_t nvme_set_feature(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
> +static uint16_t nvme_set_feature(NvmeCtrl *n, NvmeRequest *req)
>  {
> +    NvmeCmd *cmd = &req->cmd;
>      uint32_t dw10 = le32_to_cpu(cmd->cdw10);
>      uint32_t dw11 = le32_to_cpu(cmd->cdw11);
>      uint32_t nsid = le32_to_cpu(cmd->nsid);
> @@ -1516,14 +1522,14 @@ static uint16_t nvme_set_feature(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
>          n->features.async_config = dw11;
>          break;
>      case NVME_TIMESTAMP:
> -        return nvme_set_feature_timestamp(n, cmd, req);
> +        return nvme_set_feature_timestamp(n, req);
>      default:
>          return NVME_FEAT_NOT_CHANGEABLE | NVME_DNR;
>      }
>      return NVME_SUCCESS;
>  }
>  
> -static uint16_t nvme_aer(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
> +static uint16_t nvme_aer(NvmeCtrl *n, NvmeRequest *req)
>  {
>      trace_pci_nvme_aer(nvme_cid(req));
>  
> @@ -1542,33 +1548,33 @@ static uint16_t nvme_aer(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
>      return NVME_NO_COMPLETE;
>  }
>  
> -static uint16_t nvme_admin_cmd(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
> +static uint16_t nvme_admin_cmd(NvmeCtrl *n, NvmeRequest *req)
>  {
> -    trace_pci_nvme_admin_cmd(nvme_cid(req), nvme_sqid(req), cmd->opcode);
> +    trace_pci_nvme_admin_cmd(nvme_cid(req), nvme_sqid(req), req->cmd.opcode);
>  
> -    switch (cmd->opcode) {
> +    switch (req->cmd.opcode) {
>      case NVME_ADM_CMD_DELETE_SQ:
> -        return nvme_del_sq(n, cmd);
> +        return nvme_del_sq(n, req);
>      case NVME_ADM_CMD_CREATE_SQ:
> -        return nvme_create_sq(n, cmd);
> +        return nvme_create_sq(n, req);
>      case NVME_ADM_CMD_GET_LOG_PAGE:
> -        return nvme_get_log(n, cmd, req);
> +        return nvme_get_log(n, req);
>      case NVME_ADM_CMD_DELETE_CQ:
> -        return nvme_del_cq(n, cmd);
> +        return nvme_del_cq(n, req);
>      case NVME_ADM_CMD_CREATE_CQ:
> -        return nvme_create_cq(n, cmd);
> +        return nvme_create_cq(n, req);
>      case NVME_ADM_CMD_IDENTIFY:
> -        return nvme_identify(n, cmd, req);
> +        return nvme_identify(n, req);
>      case NVME_ADM_CMD_ABORT:
> -        return nvme_abort(n, cmd, req);
> +        return nvme_abort(n, req);
>      case NVME_ADM_CMD_SET_FEATURES:
> -        return nvme_set_feature(n, cmd, req);
> +        return nvme_set_feature(n, req);
>      case NVME_ADM_CMD_GET_FEATURES:
> -        return nvme_get_feature(n, cmd, req);
> +        return nvme_get_feature(n, req);
>      case NVME_ADM_CMD_ASYNC_EV_REQ:
> -        return nvme_aer(n, cmd, req);
> +        return nvme_aer(n, req);
>      default:
> -        trace_pci_nvme_err_invalid_admin_opc(cmd->opcode);
> +        trace_pci_nvme_err_invalid_admin_opc(req->cmd.opcode);
>          return NVME_INVALID_OPCODE | NVME_DNR;
>      }
>  }
> @@ -1593,9 +1599,10 @@ static void nvme_process_sq(void *opaque)
>          QTAILQ_REMOVE(&sq->req_list, req, entry);
>          QTAILQ_INSERT_TAIL(&sq->out_req_list, req, entry);
>          req->cqe.cid = cmd.cid;
> +        memcpy(&req->cmd, &cmd, sizeof(NvmeCmd));
>  
> -        status = sq->sqid ? nvme_io_cmd(n, &cmd, req) :
> -            nvme_admin_cmd(n, &cmd, req);
> +        status = sq->sqid ? nvme_io_cmd(n, req) :
> +            nvme_admin_cmd(n, req);
>          if (status != NVME_NO_COMPLETE) {
>              req->status = status;
>              nvme_enqueue_req_completion(cq, req);
> diff --git a/hw/block/nvme.h b/hw/block/nvme.h
> index 586fd3d62700..52ba794f2e9a 100644
> --- a/hw/block/nvme.h
> +++ b/hw/block/nvme.h
> @@ -25,6 +25,7 @@ typedef struct NvmeRequest {
>      BlockAIOCB              *aiocb;
>      uint16_t                status;
>      NvmeCqe                 cqe;
> +    NvmeCmd                 cmd;
>      BlockAcctCookie         acct;
>      QEMUSGList              qsg;
>      QEMUIOVector            iov;
Klaus Jensen July 29, 2020, 7:44 p.m. UTC | #3
On Jul 30 01:10, Minwoo Im wrote:
> On 20-07-20 13:37:47, Klaus Jensen wrote:
> > From: Klaus Jensen <k.jensen@samsung.com>
> > 
> > Keep a copy of the raw nvme command in the NvmeRequest and remove the
> > now redundant NvmeCmd parameter.
> > 
> > Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
> 
> I would really have suggested this change from 13th patch!
> 
> Reviewed-by: Minwoo Im <minwoo.im.dev@gmail.com>
> 

I squashed the two patches. If don't think it makes the match much
harder to review since the added namespace reference is a pretty small
change.
Klaus Jensen July 29, 2020, 8 p.m. UTC | #4
On Jul 29 21:25, Maxim Levitsky wrote:
> On Mon, 2020-07-20 at 13:37 +0200, Klaus Jensen wrote:
> > From: Klaus Jensen <k.jensen@samsung.com>
> > 
> > Keep a copy of the raw nvme command in the NvmeRequest and remove the
> > now redundant NvmeCmd parameter.
> 
> Shouldn't you clear the req->cmd in nvme_req_clear too for consistency?

It always gets unconditionally overwritten with a memcpy in
nvme_process_sq, so we are not leaving anything dangling (like we would
do with the namespace reference because it's usually not initialized for
Admin commands)
diff mbox series

Patch

diff --git a/hw/block/nvme.c b/hw/block/nvme.c
index b53afdeb3fb6..0b3dceccc89b 100644
--- a/hw/block/nvme.c
+++ b/hw/block/nvme.c
@@ -425,9 +425,9 @@  static uint16_t nvme_dma_prp(NvmeCtrl *n, uint8_t *ptr, uint32_t len,
     return status;
 }
 
-static uint16_t nvme_map(NvmeCtrl *n, NvmeCmd *cmd, size_t len,
-                         NvmeRequest *req)
+static uint16_t nvme_map(NvmeCtrl *n, size_t len, NvmeRequest *req)
 {
+    NvmeCmd *cmd = &req->cmd;
     uint64_t prp1 = le64_to_cpu(cmd->dptr.prp1);
     uint64_t prp2 = le64_to_cpu(cmd->dptr.prp2);
 
@@ -597,7 +597,7 @@  static void nvme_rw_cb(void *opaque, int ret)
     nvme_enqueue_req_completion(cq, req);
 }
 
-static uint16_t nvme_flush(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
+static uint16_t nvme_flush(NvmeCtrl *n, NvmeRequest *req)
 {
     block_acct_start(blk_get_stats(n->conf.blk), &req->acct, 0,
          BLOCK_ACCT_FLUSH);
@@ -606,9 +606,9 @@  static uint16_t nvme_flush(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
     return NVME_NO_COMPLETE;
 }
 
-static uint16_t nvme_write_zeroes(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
+static uint16_t nvme_write_zeroes(NvmeCtrl *n, NvmeRequest *req)
 {
-    NvmeRwCmd *rw = (NvmeRwCmd *)cmd;
+    NvmeRwCmd *rw = (NvmeRwCmd *)&req->cmd;
     NvmeNamespace *ns = req->ns;
     const uint8_t lba_index = NVME_ID_NS_FLBAS_INDEX(ns->id_ns.flbas);
     const uint8_t data_shift = ns->id_ns.lbaf[lba_index].ds;
@@ -633,9 +633,9 @@  static uint16_t nvme_write_zeroes(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
     return NVME_NO_COMPLETE;
 }
 
-static uint16_t nvme_rw(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
+static uint16_t nvme_rw(NvmeCtrl *n, NvmeRequest *req)
 {
-    NvmeRwCmd *rw = (NvmeRwCmd *)cmd;
+    NvmeRwCmd *rw = (NvmeRwCmd *)&req->cmd;
     NvmeNamespace *ns = req->ns;
     uint32_t nlb  = le32_to_cpu(rw->nlb) + 1;
     uint64_t slba = le64_to_cpu(rw->slba);
@@ -664,7 +664,7 @@  static uint16_t nvme_rw(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
         return status;
     }
 
-    if (nvme_map(n, cmd, data_size, req)) {
+    if (nvme_map(n, data_size, req)) {
         block_acct_invalid(blk_get_stats(n->conf.blk), acct);
         return NVME_INVALID_FIELD | NVME_DNR;
     }
@@ -690,11 +690,12 @@  static uint16_t nvme_rw(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
     return NVME_NO_COMPLETE;
 }
 
-static uint16_t nvme_io_cmd(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
+static uint16_t nvme_io_cmd(NvmeCtrl *n, NvmeRequest *req)
 {
-    uint32_t nsid = le32_to_cpu(cmd->nsid);
+    uint32_t nsid = le32_to_cpu(req->cmd.nsid);
 
-    trace_pci_nvme_io_cmd(nvme_cid(req), nsid, nvme_sqid(req), cmd->opcode);
+    trace_pci_nvme_io_cmd(nvme_cid(req), nsid, nvme_sqid(req),
+                          req->cmd.opcode);
 
     if (unlikely(nsid == 0 || nsid > n->num_namespaces)) {
         trace_pci_nvme_err_invalid_ns(nsid, n->num_namespaces);
@@ -702,16 +703,16 @@  static uint16_t nvme_io_cmd(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
     }
 
     req->ns = &n->namespaces[nsid - 1];
-    switch (cmd->opcode) {
+    switch (req->cmd.opcode) {
     case NVME_CMD_FLUSH:
-        return nvme_flush(n, cmd, req);
+        return nvme_flush(n, req);
     case NVME_CMD_WRITE_ZEROES:
-        return nvme_write_zeroes(n, cmd, req);
+        return nvme_write_zeroes(n, req);
     case NVME_CMD_WRITE:
     case NVME_CMD_READ:
-        return nvme_rw(n, cmd, req);
+        return nvme_rw(n, req);
     default:
-        trace_pci_nvme_err_invalid_opc(cmd->opcode);
+        trace_pci_nvme_err_invalid_opc(req->cmd.opcode);
         return NVME_INVALID_OPCODE | NVME_DNR;
     }
 }
@@ -727,10 +728,10 @@  static void nvme_free_sq(NvmeSQueue *sq, NvmeCtrl *n)
     }
 }
 
-static uint16_t nvme_del_sq(NvmeCtrl *n, NvmeCmd *cmd)
+static uint16_t nvme_del_sq(NvmeCtrl *n, NvmeRequest *req)
 {
-    NvmeDeleteQ *c = (NvmeDeleteQ *)cmd;
-    NvmeRequest *req, *next;
+    NvmeDeleteQ *c = (NvmeDeleteQ *)&req->cmd;
+    NvmeRequest *r, *next;
     NvmeSQueue *sq;
     NvmeCQueue *cq;
     uint16_t qid = le16_to_cpu(c->qid);
@@ -744,19 +745,19 @@  static uint16_t nvme_del_sq(NvmeCtrl *n, NvmeCmd *cmd)
 
     sq = n->sq[qid];
     while (!QTAILQ_EMPTY(&sq->out_req_list)) {
-        req = QTAILQ_FIRST(&sq->out_req_list);
-        assert(req->aiocb);
-        blk_aio_cancel(req->aiocb);
+        r = QTAILQ_FIRST(&sq->out_req_list);
+        assert(r->aiocb);
+        blk_aio_cancel(r->aiocb);
     }
     if (!nvme_check_cqid(n, sq->cqid)) {
         cq = n->cq[sq->cqid];
         QTAILQ_REMOVE(&cq->sq_list, sq, entry);
 
         nvme_post_cqes(cq);
-        QTAILQ_FOREACH_SAFE(req, &cq->req_list, entry, next) {
-            if (req->sq == sq) {
-                QTAILQ_REMOVE(&cq->req_list, req, entry);
-                QTAILQ_INSERT_TAIL(&sq->req_list, req, entry);
+        QTAILQ_FOREACH_SAFE(r, &cq->req_list, entry, next) {
+            if (r->sq == sq) {
+                QTAILQ_REMOVE(&cq->req_list, r, entry);
+                QTAILQ_INSERT_TAIL(&sq->req_list, r, entry);
             }
         }
     }
@@ -793,10 +794,10 @@  static void nvme_init_sq(NvmeSQueue *sq, NvmeCtrl *n, uint64_t dma_addr,
     n->sq[sqid] = sq;
 }
 
-static uint16_t nvme_create_sq(NvmeCtrl *n, NvmeCmd *cmd)
+static uint16_t nvme_create_sq(NvmeCtrl *n, NvmeRequest *req)
 {
     NvmeSQueue *sq;
-    NvmeCreateSq *c = (NvmeCreateSq *)cmd;
+    NvmeCreateSq *c = (NvmeCreateSq *)&req->cmd;
 
     uint16_t cqid = le16_to_cpu(c->cqid);
     uint16_t sqid = le16_to_cpu(c->sqid);
@@ -831,10 +832,10 @@  static uint16_t nvme_create_sq(NvmeCtrl *n, NvmeCmd *cmd)
     return NVME_SUCCESS;
 }
 
-static uint16_t nvme_smart_info(NvmeCtrl *n, NvmeCmd *cmd, uint8_t rae,
-                                uint32_t buf_len, uint64_t off,
-                                NvmeRequest *req)
+static uint16_t nvme_smart_info(NvmeCtrl *n, uint8_t rae, uint32_t buf_len,
+                                uint64_t off, NvmeRequest *req)
 {
+    NvmeCmd *cmd = &req->cmd;
     uint64_t prp1 = le64_to_cpu(cmd->dptr.prp1);
     uint64_t prp2 = le64_to_cpu(cmd->dptr.prp2);
     uint32_t nsid = le32_to_cpu(cmd->nsid);
@@ -889,10 +890,11 @@  static uint16_t nvme_smart_info(NvmeCtrl *n, NvmeCmd *cmd, uint8_t rae,
                         DMA_DIRECTION_FROM_DEVICE, req);
 }
 
-static uint16_t nvme_fw_log_info(NvmeCtrl *n, NvmeCmd *cmd, uint32_t buf_len,
-                                 uint64_t off, NvmeRequest *req)
+static uint16_t nvme_fw_log_info(NvmeCtrl *n, uint32_t buf_len, uint64_t off,
+                                 NvmeRequest *req)
 {
     uint32_t trans_len;
+    NvmeCmd *cmd = &req->cmd;
     uint64_t prp1 = le64_to_cpu(cmd->dptr.prp1);
     uint64_t prp2 = le64_to_cpu(cmd->dptr.prp2);
     NvmeFwSlotInfoLog fw_log = {
@@ -911,11 +913,11 @@  static uint16_t nvme_fw_log_info(NvmeCtrl *n, NvmeCmd *cmd, uint32_t buf_len,
                         DMA_DIRECTION_FROM_DEVICE, req);
 }
 
-static uint16_t nvme_error_info(NvmeCtrl *n, NvmeCmd *cmd, uint8_t rae,
-                                uint32_t buf_len, uint64_t off,
-                                NvmeRequest *req)
+static uint16_t nvme_error_info(NvmeCtrl *n, uint8_t rae, uint32_t buf_len,
+                                uint64_t off, NvmeRequest *req)
 {
     uint32_t trans_len;
+    NvmeCmd *cmd = &req->cmd;
     uint64_t prp1 = le64_to_cpu(cmd->dptr.prp1);
     uint64_t prp2 = le64_to_cpu(cmd->dptr.prp2);
     NvmeErrorLog errlog;
@@ -936,8 +938,10 @@  static uint16_t nvme_error_info(NvmeCtrl *n, NvmeCmd *cmd, uint8_t rae,
                         DMA_DIRECTION_FROM_DEVICE, req);
 }
 
-static uint16_t nvme_get_log(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
+static uint16_t nvme_get_log(NvmeCtrl *n, NvmeRequest *req)
 {
+    NvmeCmd *cmd = &req->cmd;
+
     uint32_t dw10 = le32_to_cpu(cmd->cdw10);
     uint32_t dw11 = le32_to_cpu(cmd->cdw11);
     uint32_t dw12 = le32_to_cpu(cmd->cdw12);
@@ -972,11 +976,11 @@  static uint16_t nvme_get_log(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
 
     switch (lid) {
     case NVME_LOG_ERROR_INFO:
-        return nvme_error_info(n, cmd, rae, len, off, req);
+        return nvme_error_info(n, rae, len, off, req);
     case NVME_LOG_SMART_INFO:
-        return nvme_smart_info(n, cmd, rae, len, off, req);
+        return nvme_smart_info(n, rae, len, off, req);
     case NVME_LOG_FW_SLOT_INFO:
-        return nvme_fw_log_info(n, cmd, len, off, req);
+        return nvme_fw_log_info(n, len, off, req);
     default:
         trace_pci_nvme_err_invalid_log_page(nvme_cid(req), lid);
         return NVME_INVALID_FIELD | NVME_DNR;
@@ -994,9 +998,9 @@  static void nvme_free_cq(NvmeCQueue *cq, NvmeCtrl *n)
     }
 }
 
-static uint16_t nvme_del_cq(NvmeCtrl *n, NvmeCmd *cmd)
+static uint16_t nvme_del_cq(NvmeCtrl *n, NvmeRequest *req)
 {
-    NvmeDeleteQ *c = (NvmeDeleteQ *)cmd;
+    NvmeDeleteQ *c = (NvmeDeleteQ *)&req->cmd;
     NvmeCQueue *cq;
     uint16_t qid = le16_to_cpu(c->qid);
 
@@ -1037,10 +1041,10 @@  static void nvme_init_cq(NvmeCQueue *cq, NvmeCtrl *n, uint64_t dma_addr,
     cq->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, nvme_post_cqes, cq);
 }
 
-static uint16_t nvme_create_cq(NvmeCtrl *n, NvmeCmd *cmd)
+static uint16_t nvme_create_cq(NvmeCtrl *n, NvmeRequest *req)
 {
     NvmeCQueue *cq;
-    NvmeCreateCq *c = (NvmeCreateCq *)cmd;
+    NvmeCreateCq *c = (NvmeCreateCq *)&req->cmd;
     uint16_t cqid = le16_to_cpu(c->cqid);
     uint16_t vector = le16_to_cpu(c->irq_vector);
     uint16_t qsize = le16_to_cpu(c->qsize);
@@ -1088,9 +1092,9 @@  static uint16_t nvme_create_cq(NvmeCtrl *n, NvmeCmd *cmd)
     return NVME_SUCCESS;
 }
 
-static uint16_t nvme_identify_ctrl(NvmeCtrl *n, NvmeIdentify *c,
-                                   NvmeRequest *req)
+static uint16_t nvme_identify_ctrl(NvmeCtrl *n, NvmeRequest *req)
 {
+    NvmeIdentify *c = (NvmeIdentify *)&req->cmd;
     uint64_t prp1 = le64_to_cpu(c->prp1);
     uint64_t prp2 = le64_to_cpu(c->prp2);
 
@@ -1100,10 +1104,10 @@  static uint16_t nvme_identify_ctrl(NvmeCtrl *n, NvmeIdentify *c,
                         prp2, DMA_DIRECTION_FROM_DEVICE, req);
 }
 
-static uint16_t nvme_identify_ns(NvmeCtrl *n, NvmeIdentify *c,
-                                 NvmeRequest *req)
+static uint16_t nvme_identify_ns(NvmeCtrl *n, NvmeRequest *req)
 {
     NvmeNamespace *ns;
+    NvmeIdentify *c = (NvmeIdentify *)&req->cmd;
     uint32_t nsid = le32_to_cpu(c->nsid);
     uint64_t prp1 = le64_to_cpu(c->prp1);
     uint64_t prp2 = le64_to_cpu(c->prp2);
@@ -1121,9 +1125,9 @@  static uint16_t nvme_identify_ns(NvmeCtrl *n, NvmeIdentify *c,
                         prp2, DMA_DIRECTION_FROM_DEVICE, req);
 }
 
-static uint16_t nvme_identify_nslist(NvmeCtrl *n, NvmeIdentify *c,
-                                     NvmeRequest *req)
+static uint16_t nvme_identify_nslist(NvmeCtrl *n, NvmeRequest *req)
 {
+    NvmeIdentify *c = (NvmeIdentify *)&req->cmd;
     static const int data_len = NVME_IDENTIFY_DATA_SIZE;
     uint32_t min_nsid = le32_to_cpu(c->nsid);
     uint64_t prp1 = le64_to_cpu(c->prp1);
@@ -1160,9 +1164,9 @@  static uint16_t nvme_identify_nslist(NvmeCtrl *n, NvmeIdentify *c,
     return ret;
 }
 
-static uint16_t nvme_identify_ns_descr_list(NvmeCtrl *n, NvmeIdentify *c,
-                                            NvmeRequest *req)
+static uint16_t nvme_identify_ns_descr_list(NvmeCtrl *n, NvmeRequest *req)
 {
+    NvmeIdentify *c = (NvmeIdentify *)&req->cmd;
     uint32_t nsid = le32_to_cpu(c->nsid);
     uint64_t prp1 = le64_to_cpu(c->prp1);
     uint64_t prp2 = le64_to_cpu(c->prp2);
@@ -1201,28 +1205,28 @@  static uint16_t nvme_identify_ns_descr_list(NvmeCtrl *n, NvmeIdentify *c,
                         DMA_DIRECTION_FROM_DEVICE, req);
 }
 
-static uint16_t nvme_identify(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
+static uint16_t nvme_identify(NvmeCtrl *n, NvmeRequest *req)
 {
-    NvmeIdentify *c = (NvmeIdentify *)cmd;
+    NvmeIdentify *c = (NvmeIdentify *)&req->cmd;
 
     switch (le32_to_cpu(c->cns)) {
     case NVME_ID_CNS_NS:
-        return nvme_identify_ns(n, c, req);
+        return nvme_identify_ns(n, req);
     case NVME_ID_CNS_CTRL:
-        return nvme_identify_ctrl(n, c, req);
+        return nvme_identify_ctrl(n, req);
     case NVME_ID_CNS_NS_ACTIVE_LIST:
-        return nvme_identify_nslist(n, c, req);
+        return nvme_identify_nslist(n, req);
     case NVME_ID_CNS_NS_DESCR_LIST:
-        return nvme_identify_ns_descr_list(n, c, req);
+        return nvme_identify_ns_descr_list(n, req);
     default:
         trace_pci_nvme_err_invalid_identify_cns(le32_to_cpu(c->cns));
         return NVME_INVALID_FIELD | NVME_DNR;
     }
 }
 
-static uint16_t nvme_abort(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
+static uint16_t nvme_abort(NvmeCtrl *n, NvmeRequest *req)
 {
-    uint16_t sqid = le32_to_cpu(cmd->cdw10) & 0xffff;
+    uint16_t sqid = le32_to_cpu(req->cmd.cdw10) & 0xffff;
 
     req->cqe.result = 1;
     if (nvme_check_sqid(n, sqid)) {
@@ -1272,9 +1276,9 @@  static inline uint64_t nvme_get_timestamp(const NvmeCtrl *n)
     return cpu_to_le64(ts.all);
 }
 
-static uint16_t nvme_get_feature_timestamp(NvmeCtrl *n, NvmeCmd *cmd,
-                                           NvmeRequest *req)
+static uint16_t nvme_get_feature_timestamp(NvmeCtrl *n, NvmeRequest *req)
 {
+    NvmeCmd *cmd = &req->cmd;
     uint64_t prp1 = le64_to_cpu(cmd->dptr.prp1);
     uint64_t prp2 = le64_to_cpu(cmd->dptr.prp2);
 
@@ -1284,8 +1288,9 @@  static uint16_t nvme_get_feature_timestamp(NvmeCtrl *n, NvmeCmd *cmd,
                         prp2, DMA_DIRECTION_FROM_DEVICE, req);
 }
 
-static uint16_t nvme_get_feature(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
+static uint16_t nvme_get_feature(NvmeCtrl *n, NvmeRequest *req)
 {
+    NvmeCmd *cmd = &req->cmd;
     uint32_t dw10 = le32_to_cpu(cmd->cdw10);
     uint32_t dw11 = le32_to_cpu(cmd->cdw11);
     uint32_t nsid = le32_to_cpu(cmd->nsid);
@@ -1359,7 +1364,7 @@  static uint16_t nvme_get_feature(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
         result = n->features.async_config;
         goto out;
     case NVME_TIMESTAMP:
-        return nvme_get_feature_timestamp(n, cmd, req);
+        return nvme_get_feature_timestamp(n, req);
     default:
         break;
     }
@@ -1405,11 +1410,11 @@  out:
     return NVME_SUCCESS;
 }
 
-static uint16_t nvme_set_feature_timestamp(NvmeCtrl *n, NvmeCmd *cmd,
-                                           NvmeRequest *req)
+static uint16_t nvme_set_feature_timestamp(NvmeCtrl *n, NvmeRequest *req)
 {
     uint16_t ret;
     uint64_t timestamp;
+    NvmeCmd *cmd = &req->cmd;
     uint64_t prp1 = le64_to_cpu(cmd->dptr.prp1);
     uint64_t prp2 = le64_to_cpu(cmd->dptr.prp2);
 
@@ -1424,8 +1429,9 @@  static uint16_t nvme_set_feature_timestamp(NvmeCtrl *n, NvmeCmd *cmd,
     return NVME_SUCCESS;
 }
 
-static uint16_t nvme_set_feature(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
+static uint16_t nvme_set_feature(NvmeCtrl *n, NvmeRequest *req)
 {
+    NvmeCmd *cmd = &req->cmd;
     uint32_t dw10 = le32_to_cpu(cmd->cdw10);
     uint32_t dw11 = le32_to_cpu(cmd->cdw11);
     uint32_t nsid = le32_to_cpu(cmd->nsid);
@@ -1516,14 +1522,14 @@  static uint16_t nvme_set_feature(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
         n->features.async_config = dw11;
         break;
     case NVME_TIMESTAMP:
-        return nvme_set_feature_timestamp(n, cmd, req);
+        return nvme_set_feature_timestamp(n, req);
     default:
         return NVME_FEAT_NOT_CHANGEABLE | NVME_DNR;
     }
     return NVME_SUCCESS;
 }
 
-static uint16_t nvme_aer(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
+static uint16_t nvme_aer(NvmeCtrl *n, NvmeRequest *req)
 {
     trace_pci_nvme_aer(nvme_cid(req));
 
@@ -1542,33 +1548,33 @@  static uint16_t nvme_aer(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
     return NVME_NO_COMPLETE;
 }
 
-static uint16_t nvme_admin_cmd(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
+static uint16_t nvme_admin_cmd(NvmeCtrl *n, NvmeRequest *req)
 {
-    trace_pci_nvme_admin_cmd(nvme_cid(req), nvme_sqid(req), cmd->opcode);
+    trace_pci_nvme_admin_cmd(nvme_cid(req), nvme_sqid(req), req->cmd.opcode);
 
-    switch (cmd->opcode) {
+    switch (req->cmd.opcode) {
     case NVME_ADM_CMD_DELETE_SQ:
-        return nvme_del_sq(n, cmd);
+        return nvme_del_sq(n, req);
     case NVME_ADM_CMD_CREATE_SQ:
-        return nvme_create_sq(n, cmd);
+        return nvme_create_sq(n, req);
     case NVME_ADM_CMD_GET_LOG_PAGE:
-        return nvme_get_log(n, cmd, req);
+        return nvme_get_log(n, req);
     case NVME_ADM_CMD_DELETE_CQ:
-        return nvme_del_cq(n, cmd);
+        return nvme_del_cq(n, req);
     case NVME_ADM_CMD_CREATE_CQ:
-        return nvme_create_cq(n, cmd);
+        return nvme_create_cq(n, req);
     case NVME_ADM_CMD_IDENTIFY:
-        return nvme_identify(n, cmd, req);
+        return nvme_identify(n, req);
     case NVME_ADM_CMD_ABORT:
-        return nvme_abort(n, cmd, req);
+        return nvme_abort(n, req);
     case NVME_ADM_CMD_SET_FEATURES:
-        return nvme_set_feature(n, cmd, req);
+        return nvme_set_feature(n, req);
     case NVME_ADM_CMD_GET_FEATURES:
-        return nvme_get_feature(n, cmd, req);
+        return nvme_get_feature(n, req);
     case NVME_ADM_CMD_ASYNC_EV_REQ:
-        return nvme_aer(n, cmd, req);
+        return nvme_aer(n, req);
     default:
-        trace_pci_nvme_err_invalid_admin_opc(cmd->opcode);
+        trace_pci_nvme_err_invalid_admin_opc(req->cmd.opcode);
         return NVME_INVALID_OPCODE | NVME_DNR;
     }
 }
@@ -1593,9 +1599,10 @@  static void nvme_process_sq(void *opaque)
         QTAILQ_REMOVE(&sq->req_list, req, entry);
         QTAILQ_INSERT_TAIL(&sq->out_req_list, req, entry);
         req->cqe.cid = cmd.cid;
+        memcpy(&req->cmd, &cmd, sizeof(NvmeCmd));
 
-        status = sq->sqid ? nvme_io_cmd(n, &cmd, req) :
-            nvme_admin_cmd(n, &cmd, req);
+        status = sq->sqid ? nvme_io_cmd(n, req) :
+            nvme_admin_cmd(n, req);
         if (status != NVME_NO_COMPLETE) {
             req->status = status;
             nvme_enqueue_req_completion(cq, req);
diff --git a/hw/block/nvme.h b/hw/block/nvme.h
index 586fd3d62700..52ba794f2e9a 100644
--- a/hw/block/nvme.h
+++ b/hw/block/nvme.h
@@ -25,6 +25,7 @@  typedef struct NvmeRequest {
     BlockAIOCB              *aiocb;
     uint16_t                status;
     NvmeCqe                 cqe;
+    NvmeCmd                 cmd;
     BlockAcctCookie         acct;
     QEMUSGList              qsg;
     QEMUIOVector            iov;