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[PATCH 04/25] block/nvme: Trace controller capabilities
From: |
Philippe Mathieu-Daudé |
Subject: |
[PATCH 04/25] block/nvme: Trace controller capabilities |
Date: |
Tue, 27 Oct 2020 14:55:26 +0100 |
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));
+ 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"
--
2.26.2
[PATCH 05/25] block/nvme: Trace nvme_poll_queue() per queue, Philippe Mathieu-Daudé, 2020/10/27