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Re: [PATCH 04/25] block/nvme: Trace controller capabilities
From: |
Auger Eric |
Subject: |
Re: [PATCH 04/25] block/nvme: Trace controller capabilities |
Date: |
Wed, 28 Oct 2020 11:20:50 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 |
Hi Philippe,
On 10/27/20 2:55 PM, Philippe Mathieu-Daudé wrote:
> Controllers have different capabilities and report them in the
> CAP register. We are particularly interested by the page size
> limits.
>
> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
> ---
> block/nvme.c | 13 +++++++++++++
> block/trace-events | 2 ++
> 2 files changed, 15 insertions(+)
>
> diff --git a/block/nvme.c b/block/nvme.c
> index 6f1d7f9b2a1..361b5772b7a 100644
> --- a/block/nvme.c
> +++ b/block/nvme.c
> @@ -727,6 +727,19 @@ static int nvme_init(BlockDriverState *bs, const char
> *device, int namespace,
> * Initialization". */
>
> cap = le64_to_cpu(regs->cap);
> + trace_nvme_controller_capability_raw(cap);
> + trace_nvme_controller_capability("Maximum Queue Entries Supported",
> + 1 + NVME_CAP_MQES(cap));
> + trace_nvme_controller_capability("Contiguous Queues Required",
> + NVME_CAP_CQR(cap));
I think this should be +1 too (0's based value)
> + trace_nvme_controller_capability("Doorbell Stride",
> + 2 << (2 + NVME_CAP_DSTRD(cap)));
> + trace_nvme_controller_capability("Subsystem Reset Supported",
> + NVME_CAP_NSSRS(cap));
> + trace_nvme_controller_capability("Memory Page Size Minimum",
> + 1 << (12 + NVME_CAP_MPSMIN(cap)));
> + trace_nvme_controller_capability("Memory Page Size Maximum",
> + 1 << (12 + NVME_CAP_MPSMAX(cap)));
> if (!NVME_CAP_CSS(cap)) {
> error_setg(errp, "Device doesn't support NVMe command set");
> ret = -EINVAL;
> diff --git a/block/trace-events b/block/trace-events
> index 0955c85c783..b90b07b15fa 100644
> --- a/block/trace-events
> +++ b/block/trace-events
> @@ -134,6 +134,8 @@ qed_aio_write_postfill(void *s, void *acb, uint64_t
> start, size_t len, uint64_t
> qed_aio_write_main(void *s, void *acb, int ret, uint64_t offset, size_t len)
> "s %p acb %p ret %d offset %"PRIu64" len %zu"
>
> # nvme.c
> +nvme_controller_capability_raw(uint64_t value) "0x%08"PRIx64
> +nvme_controller_capability(const char *desc, uint64_t value) "%s: %"PRIu64
> nvme_kick(void *s, int queue) "s %p queue %d"
> nvme_dma_flush_queue_wait(void *s) "s %p"
> nvme_error(int cmd_specific, int sq_head, int sqid, int cid, int status)
> "cmd_specific %d sq_head %d sqid %d cid %d status 0x%x"
>
Besides
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Thanks
Eric
[PATCH 05/25] block/nvme: Trace nvme_poll_queue() per queue, Philippe Mathieu-Daudé, 2020/10/27
[PATCH 06/25] block/nvme: Improve nvme_free_req_queue_wait() trace information, Philippe Mathieu-Daudé, 2020/10/27
[PATCH 07/25] block/nvme: Trace queue pair creation/deletion, Philippe Mathieu-Daudé, 2020/10/27