[PATCH v2 01/15] hw/block/nvme: Define 64 bit cqe.result

[Dmitry Fomichev <dmitry.fomichev@wdc.com>]

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>
Reviewed-by: Klaus Jensen <k.jensen@samsung.com>
---
 block/nvme.c         |  2 +-
 block/trace-events   |  2 +-
 hw/block/nvme.c      | 10 +++++-----
 include/block/nvme.h |  6 ++++--
 4 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/block/nvme.c b/block/nvme.c
index 05485fdd11..45e1a5dcd1 100644
--- a/block/nvme.c
+++ b/block/nvme.c
@@ -333,7 +333,7 @@ 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 e1c79a910d..55c54a18c3 100644
--- a/block/trace-events
+++ b/block/trace-events
@@ -139,7 +139,7 @@ qed_aio_write_main(void *s, void *acb, int ret, uint64_t offset, size_t len) "s
 # 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_plugged(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 63078f6009..3a90d80694 100644
--- a/hw/block/nvme.c
+++ b/hw/block/nvme.c
@@ -524,7 +524,7 @@ static void nvme_process_aers(void *opaque)
 
         req = n->aer_reqs[n->outstanding_aers];
 
-        result = (NvmeAerResult *) &req->cqe.result;
+        result = (NvmeAerResult *) &req->cqe.result32;
         result->event_type = event->result.event_type;
         result->event_info = event->result.event_info;
         result->log_page = event->result.log_page;
@@ -1247,7 +1247,7 @@ static uint16_t nvme_abort(NvmeCtrl *n, NvmeRequest *req)
 {
     uint16_t sqid = le32_to_cpu(req->cmd.cdw10) & 0xffff;
 
-    req->cqe.result = 1;
+    req->cqe.result32 = 1;
     if (nvme_check_sqid(n, sqid)) {
         return NVME_INVALID_FIELD | NVME_DNR;
     }
@@ -1425,7 +1425,7 @@ defaults:
     }
 
 out:
-    req->cqe.result = cpu_to_le32(result);
+    req->cqe.result32 = cpu_to_le32(result);
     return NVME_SUCCESS;
 }
 
@@ -1534,8 +1534,8 @@ static uint16_t nvme_set_feature(NvmeCtrl *n, 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_ASYNCHRONOUS_EVENT_CONF:
         n->features.async_config = dw11;
diff --git a/include/block/nvme.h b/include/block/nvme.h
index 65e68a82c8..ac0ccfcb26 100644
--- a/include/block/nvme.h
+++ b/include/block/nvme.h
@@ -617,8 +617,10 @@ typedef struct QEMU_PACKED NvmeAerResult {
 } NvmeAerResult;
 
 typedef struct QEMU_PACKED 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