[PATCH v2 02/18] hw/block/nvme: Define 64 bit cqe.result

[Dmitry Fomichev]

From: Ajay Joshi <ajay.joshi@wdc.com>

A new write command, Zone Append, is added as a part of Zoned
Namespace Command Set. Upon successful completion of this command,
the controller returns the start LBA of the performed write operation
in cqe.result field. Therefore, the maximum size of this variable
needs to be changed from 32 to 64 bit, consuming the reserved 32 bit
field that follows the result in CQE struct. Since the existing
commands are expected to return a 32 bit LE value, two separate
variables, result32 and result64, are now kept in a union.

Signed-off-by: Ajay Joshi <ajay.joshi@wdc.com>
Signed-off-by: Dmitry Fomichev <dmitry.fomichev@wdc.com>
---
 block/nvme.c         | 2 +-
 block/trace-events   | 2 +-
 hw/block/nvme.c      | 6 +++---
 include/block/nvme.h | 6 ++++--
 4 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/block/nvme.c b/block/nvme.c
index eb2f54dd9d..ca245ec574 100644
--- a/block/nvme.c
+++ b/block/nvme.c
@@ -287,7 +287,7 @@ static inline int nvme_translate_error(const NvmeCqe *c)
 {
     uint16_t status = (le16_to_cpu(c->status) >> 1) & 0xFF;
     if (status) {
-        trace_nvme_error(le32_to_cpu(c->result),
+        trace_nvme_error(le64_to_cpu(c->result64),
                          le16_to_cpu(c->sq_head),
                          le16_to_cpu(c->sq_id),
                          le16_to_cpu(c->cid),
diff --git a/block/trace-events b/block/trace-events
index 29dff8881c..05c1393943 100644
--- a/block/trace-events
+++ b/block/trace-events
@@ -156,7 +156,7 @@ vxhs_get_creds(const char *cacert, const char *client_key, 
const char *client_ce
 # nvme.c
 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"
+nvme_error(uint64_t cmd_specific, int sq_head, int sqid, int cid, int status) 
"cmd_specific %ld sq_head %d sqid %d cid %d status 0x%x"
 nvme_process_completion(void *s, int index, int inflight) "s %p queue %d 
inflight %d"
 nvme_process_completion_queue_busy(void *s, int index) "s %p queue %d"
 nvme_complete_command(void *s, int index, int cid) "s %p queue %d cid %d"
diff --git a/hw/block/nvme.c b/hw/block/nvme.c
index 3ed9f3d321..a1bbc9acde 100644
--- a/hw/block/nvme.c
+++ b/hw/block/nvme.c
@@ -823,7 +823,7 @@ static uint16_t nvme_get_feature(NvmeCtrl *n, NvmeCmd *cmd, 
NvmeRequest *req)
         return NVME_INVALID_FIELD | NVME_DNR;
     }
 
-    req->cqe.result = result;
+    req->cqe.result32 = result;
     return NVME_SUCCESS;
 }
 
@@ -859,8 +859,8 @@ static uint16_t nvme_set_feature(NvmeCtrl *n, NvmeCmd *cmd, 
NvmeRequest *req)
                                     ((dw11 >> 16) & 0xFFFF) + 1,
                                     n->params.max_ioqpairs,
                                     n->params.max_ioqpairs);
-        req->cqe.result = cpu_to_le32((n->params.max_ioqpairs - 1) |
-                                      ((n->params.max_ioqpairs - 1) << 16));
+        req->cqe.result32 = cpu_to_le32((n->params.max_ioqpairs - 1) |
+                                        ((n->params.max_ioqpairs - 1) << 16));
         break;
     case NVME_TIMESTAMP:
         return nvme_set_feature_timestamp(n, cmd);
diff --git a/include/block/nvme.h b/include/block/nvme.h
index 1720ee1d51..9c3a04dcd7 100644
--- a/include/block/nvme.h
+++ b/include/block/nvme.h
@@ -577,8 +577,10 @@ typedef struct NvmeAerResult {
 } NvmeAerResult;
 
 typedef struct NvmeCqe {
-    uint32_t    result;
-    uint32_t    rsvd;
+    union {
+        uint64_t     result64;
+        uint32_t     result32;
+    };
     uint16_t    sq_head;
     uint16_t    sq_id;
     uint16_t    cid;
-- 
2.21.0