nvme-print: Show value for Transport SGL Data Block Descriptor support

The Transport SGL Data Block Descriptor is a new SGL Descriptor Type added in
NVMe 1.4. Support for this descriptor type is added to the SGL Support (SGLS)
field of the Identify Controller data structure.

Signed-off-by: Kenneth Heitke <kenneth.heitke@intel.com>

diff --git a/nvme-print.c b/nvme-print.c
index bbf7b972415e60ced131f402e82abf14742a5fb9..19f21424f2d67683d0939d770ef665a1e07ae7c8 100644 (file)
--- a/nvme-print.c
+++ b/nvme-print.c
@@ -464,7 +464,8 @@ static void show_nvme_id_ctrl_nwpc(__u8 nwpc)
 static void show_nvme_id_ctrl_sgls(__le32 ctrl_sgls)
 {
        __u32 sgls = le32_to_cpu(ctrl_sgls);
-       __u32 rsvd0 = (sgls & 0xFF700000) >> 21;
+       __u32 rsvd0 = (sgls & 0xFFC00000) >> 22;
+       __u32 trsdbd = (sgls & 0x200000) >> 21;
        __u32 aofdsl = (sgls & 0x100000) >> 20;
        __u32 mpcsd = (sgls & 0x80000) >> 19;
        __u32 sglltb = (sgls & 0x40000) >> 18;
@@ -475,7 +476,10 @@ static void show_nvme_id_ctrl_sgls(__le32 ctrl_sgls)
        __u32 sglsp = sgls & 0x3;
 
        if (rsvd0)
-               printf(" [31:21]: %#x\tReserved\n", rsvd0);
+               printf(" [31:22]: %#x\tReserved\n", rsvd0);
+       if (sglsp || (!sglsp && trsdbd))
+               printf(" [21:21]: %#x\tTransport SGL Data Block Descriptor %sSupported\n",
+                       trsdbd, trsdbd ? "" : "Not ");
        if (sglsp || (!sglsp && aofdsl))
                printf(" [20:20]: %#x\tAddress Offsets %sSupported\n",
                        aofdsl, aofdsl ? "" : "Not ");