hw/nvme: add new command abort case

NVMe command set specification for end-to-end data protection formatted
namespace states:

    o If the Reference Tag Check bit of the PRCHK field is set to ‘1’ and
      the namespace is formatted for Type 3 protection, then the
      controller:
          ▪ should not compare the protection Information Reference Tag
            field to the computed reference tag; and
          ▪ may ignore the ILBRT and EILBRT fields. If a command is
            aborted as a result of the Reference Tag Check bit of the
            PRCHK field being set to ‘1’, then that command should be
            aborted with a status code of Invalid Protection Information,
            but may be aborted with a status code of Invalid Field in
            Command.

Currently qemu compares reftag in the nvme_dif_prchk function whenever
Reference Tag Check bit is set in the command. For type 3 namespaces
however, caller of nvme_dif_prchk - nvme_dif_check does not increment
reftag for each subsequent logical block. That way commands incorporating
more than one logical block for type 3 formatted namespaces with reftag
check bit set, always fail with End-to-end Reference Tag Check Error.
Comply with spec by handling case of set Reference Tag Check
bit in the type 3 formatted namespace.

Fixes: 146f720c5563 ("hw/block/nvme: end-to-end data protection")
Signed-off-by: Dmitry Tikhov <d.tihov@yadro.com>
Signed-off-by: Klaus Jensen <k.jensen@samsung.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/hw/nvme/dif.c b/hw/nvme/dif.c
index 62d885f83e..63c44c86ab 100644
--- a/hw/nvme/dif.c
+++ b/hw/nvme/dif.c
@@ -26,6 +26,11 @@ uint16_t nvme_check_prinfo(NvmeNamespace *ns, uint8_t prinfo, uint64_t slba,
         return NVME_INVALID_PROT_INFO | NVME_DNR;
     }
 
+    if ((NVME_ID_NS_DPS_TYPE(ns->id_ns.dps) == NVME_ID_NS_DPS_TYPE_3) &&
+        (prinfo & NVME_PRINFO_PRCHK_REF)) {
+        return NVME_INVALID_PROT_INFO;
+    }
+
     return NVME_SUCCESS;
 }