Re: [PATCH v2 16/16] hw/block/nvme: remove explicit qsg/iov parameters

[Maxim Levitsky]

On Thu, 2020-07-30 at 00:06 +0200, Klaus Jensen wrote:
> From: Klaus Jensen <k.jensen@samsung.com>
> 
> Since nvme_map_prp always operate on the request-scoped qsg/iovs, just
> pass a single pointer to the NvmeRequest instead of two for each of the
> qsg and iov.
> 
> Suggested-by: Minwoo Im <minwoo.im.dev@gmail.com>
> Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
> ---
>  hw/block/nvme.c | 11 +++++++----
>  1 file changed, 7 insertions(+), 4 deletions(-)
> 
> diff --git a/hw/block/nvme.c b/hw/block/nvme.c
> index 55b1a68ced8c..aea8a8b6946c 100644
> --- a/hw/block/nvme.c
> +++ b/hw/block/nvme.c
> @@ -284,8 +284,8 @@ static uint16_t nvme_map_addr(NvmeCtrl *n, QEMUSGList 
> *qsg, QEMUIOVector *iov,
>      return NVME_SUCCESS;
>  }
>  
> -static uint16_t nvme_map_prp(QEMUSGList *qsg, QEMUIOVector *iov, uint64_t 
> prp1,
> -                             uint64_t prp2, uint32_t len, NvmeCtrl *n)
> +static uint16_t nvme_map_prp(NvmeCtrl *n, uint64_t prp1, uint64_t prp2,
> +                             uint32_t len, NvmeRequest *req)
>  {
>      hwaddr trans_len = n->page_size - (prp1 % n->page_size);
>      trans_len = MIN(len, trans_len);
> @@ -293,6 +293,9 @@ static uint16_t nvme_map_prp(QEMUSGList *qsg, 
> QEMUIOVector *iov, uint64_t prp1,
>      uint16_t status;
>      bool prp_list_in_cmb = false;
>  
> +    QEMUSGList *qsg = &req->qsg;
> +    QEMUIOVector *iov = &req->iov;
> +
>      trace_pci_nvme_map_prp(trans_len, len, prp1, prp2, num_prps);
>  
>      if (unlikely(!prp1)) {
> @@ -386,7 +389,7 @@ static uint16_t nvme_dma_prp(NvmeCtrl *n, uint8_t *ptr, 
> uint32_t len,
>  {
>      uint16_t status = NVME_SUCCESS;
>  
> -    status = nvme_map_prp(&req->qsg, &req->iov, prp1, prp2, len, n);
> +    status = nvme_map_prp(n, prp1, prp2, len, req);
>      if (status) {
>          return status;
>      }
> @@ -431,7 +434,7 @@ static uint16_t nvme_map_dptr(NvmeCtrl *n, size_t len, 
> NvmeRequest *req)
>      uint64_t prp1 = le64_to_cpu(cmd->dptr.prp1);
>      uint64_t prp2 = le64_to_cpu(cmd->dptr.prp2);
>  
> -    return nvme_map_prp(&req->qsg, &req->iov, prp1, prp2, len, n);
> +    return nvme_map_prp(n, prp1, prp2, len, req);
>  }
>  
>  static void nvme_post_cqes(void *opaque)
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>

Best regards,
        Maxim Levitsky