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block/nvme: Trace controller capabilities

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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>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Tested-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20201029093306.1063879-5-philmd@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Tested-by: Eric Auger <eric.auger@redhat.com>
This commit is contained in:
Philippe Mathieu-Daudé 2020-10-29 10:32:45 +01:00 committed by Stefan Hajnoczi
parent 58ad6ae0cb
commit 15b2260bef
2 changed files with 15 additions and 0 deletions
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13
block/nvme.c
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@ -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));
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;

2
block/trace-events
View File

@ -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"