[07/17] hw/block/nvme: add request mapping helper

Commit Message

Klaus Jensen June 29, 2020, 7:50 p.m. UTC

From: Klaus Jensen <[e-mail]>

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

Signed-off-by: Klaus Jensen <[e-mail]>
Reviewed-by: Maxim Levitsky <[e-mail]>
---
 hw/block/nvme.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

Patch

diff --git a/hw/block/nvme.c b/hw/block/nvme.c
index e7b7a1900b0b..d236a3cdee54 100644
--- a/hw/block/nvme.c
+++ b/hw/block/nvme.c
@@ -378,6 +378,15 @@  static uint16_t nvme_dma_prp(NvmeCtrl *n, uint8_t *ptr, uint32_t len,
     return status;
 }
 
+static uint16_t nvme_map(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(n, &req->qsg, &req->iov, prp1, prp2, len, req);
+}
+
 static void nvme_post_cqes(void *opaque)
 {
     NvmeCQueue *cq = opaque;
@@ -565,8 +574,6 @@  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;
@@ -583,7 +590,7 @@  static uint16_t nvme_rw(NvmeCtrl *n, NvmeNamespace *ns, NvmeCmd *cmd,
         return NVME_LBA_RANGE | NVME_DNR;
     }
 
-    if (nvme_map_prp(n, &req->qsg, &req->iov, prp1, prp2, data_size, req)) {
+    if (nvme_map(n, cmd, data_size, req)) {
         block_acct_invalid(blk_get_stats(n->conf.blk), acct);
         return NVME_INVALID_FIELD | NVME_DNR;
     }