Re: [PATCH v2 07/16] hw/block/nvme: add tracing to nvme_map_prp

[Minwoo Im <minwoo.im.dev@gmail.com>]

On Thu, Jul 30, 2020 at 7:06 AM Klaus Jensen <its@irrelevant.dk> wrote:
>
> From: Klaus Jensen <k.jensen@samsung.com>
>
> Add tracing to nvme_map_prp.
>
> Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
> ---
>  hw/block/nvme.c       | 2 ++
>  hw/block/trace-events | 1 +
>  2 files changed, 3 insertions(+)
>
> diff --git a/hw/block/nvme.c b/hw/block/nvme.c
> index 571635ebe9f9..952afbb05175 100644
> --- a/hw/block/nvme.c
> +++ b/hw/block/nvme.c
> @@ -274,6 +274,8 @@ static uint16_t nvme_map_prp(QEMUSGList *qsg, QEMUIOVector *iov, uint64_t prp1,
>      int num_prps = (len >> n->page_bits) + 1;
>      uint16_t status;
>
> +    trace_pci_nvme_map_prp(trans_len, len, prp1, prp2, num_prps);

Hmm.. Okay with this.  But once QEMUSGList and QEMUIOVector instances are coming
into the NvmeRequest, we just can pass the NvmeRequest instance here
and print the cid as well
later :)

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

Thanks!

> +
>      if (unlikely(!prp1)) {
>          trace_pci_nvme_err_invalid_prp();
>          return NVME_INVALID_FIELD | NVME_DNR;
> diff --git a/hw/block/trace-events b/hw/block/trace-events
> index f3b2d004e078..f20c59a4b542 100644
> --- a/hw/block/trace-events
> +++ b/hw/block/trace-events
> @@ -35,6 +35,7 @@ pci_nvme_irq_masked(void) "IRQ is masked"
>  pci_nvme_dma_read(uint64_t prp1, uint64_t prp2) "DMA read, prp1=0x%"PRIx64" prp2=0x%"PRIx64""
>  pci_nvme_map_addr(uint64_t addr, uint64_t len) "addr 0x%"PRIx64" len %"PRIu64""
>  pci_nvme_map_addr_cmb(uint64_t addr, uint64_t len) "addr 0x%"PRIx64" len %"PRIu64""
> +pci_nvme_map_prp(uint64_t trans_len, uint32_t len, uint64_t prp1, uint64_t prp2, int num_prps) "trans_len %"PRIu64" len %"PRIu32" prp1 0x%"PRIx64" prp2 0x%"PRIx64" num_prps %d"
>  pci_nvme_io_cmd(uint16_t cid, uint32_t nsid, uint16_t sqid, uint8_t opcode) "cid %"PRIu16" nsid %"PRIu32" sqid %"PRIu16" opc 0x%"PRIx8""
>  pci_nvme_admin_cmd(uint16_t cid, uint16_t sqid, uint8_t opcode) "cid %"PRIu16" sqid %"PRIu16" opc 0x%"PRIx8""
>  pci_nvme_rw(const char *verb, uint32_t blk_count, uint64_t byte_count, uint64_t lba) "%s %"PRIu32" blocks (%"PRIu64" bytes) from LBA %"PRIu64""
> --
> 2.27.0
>