[PATCH v2 08/16] hw/block/nvme: add request mapping helper

[Klaus Jensen <its@irrelevant.dk>]

From: Klaus Jensen <k.jensen@samsung.com>

Introduce the nvme_map helper to remove some noise in the main nvme_rw
function.

Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
---
 hw/block/nvme.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/hw/block/nvme.c b/hw/block/nvme.c
index 952afbb05175..198a26890e0c 100644
--- a/hw/block/nvme.c
+++ b/hw/block/nvme.c
@@ -415,6 +415,15 @@ static uint16_t nvme_dma_prp(NvmeCtrl *n, uint8_t *ptr, uint32_t len,
     return status;
 }
 
+static uint16_t nvme_map_dptr(NvmeCtrl *n, NvmeCmd *cmd, size_t len,
+                         NvmeRequest *req)
+{
+    uint64_t prp1 = le64_to_cpu(cmd->dptr.prp1);
+    uint64_t prp2 = le64_to_cpu(cmd->dptr.prp2);
+
+    return nvme_map_prp(&req->qsg, &req->iov, prp1, prp2, len, n);
+}
+
 static void nvme_post_cqes(void *opaque)
 {
     NvmeCQueue *cq = opaque;
@@ -602,8 +611,6 @@ static uint16_t nvme_rw(NvmeCtrl *n, NvmeNamespace *ns, NvmeCmd *cmd,
     NvmeRwCmd *rw = (NvmeRwCmd *)cmd;
     uint32_t nlb  = le32_to_cpu(rw->nlb) + 1;
     uint64_t slba = le64_to_cpu(rw->slba);
-    uint64_t prp1 = le64_to_cpu(rw->dptr.prp1);
-    uint64_t prp2 = le64_to_cpu(rw->dptr.prp2);
 
     uint8_t lba_index  = NVME_ID_NS_FLBAS_INDEX(ns->id_ns.flbas);
     uint8_t data_shift = ns->id_ns.lbaf[lba_index].ds;
@@ -620,7 +627,7 @@ static uint16_t nvme_rw(NvmeCtrl *n, NvmeNamespace *ns, NvmeCmd *cmd,
         return NVME_LBA_RANGE | NVME_DNR;
     }
 
-    if (nvme_map_prp(&req->qsg, &req->iov, prp1, prp2, data_size, n)) {
+    if (nvme_map_dptr(n, cmd, data_size, req)) {
         block_acct_invalid(blk_get_stats(n->conf.blk), acct);
         return NVME_INVALID_FIELD | NVME_DNR;
     }
-- 
2.27.0