From: Bart Van Assche <bvanassche@acm.org>
Date: Tue, 18 Jun 2019 16:13:52 +0000 (-0700)
Subject: nvme-cli: Report the NVMe 1.4 NPWG, NPWA, NPDG, NPDA and NOWS fields
X-Git-Tag: v1.9~40^2
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=35a773db97a80f63c9efe97c51747dc808d306f4;p=users%2Fsagi%2Fnvme-cli.git

nvme-cli: Report the NVMe 1.4 NPWG, NPWA, NPDG, NPDA and NOWS fields

From the NVMe 1.4 paragraph about NSFEAT:

"Bit 4 if set to 1: indicates that the fields NPWG, NPWA, NPDG, NPDA, and
NOWS are defined for this namespace and should be used by the host for I/O
optimization; and NOWS defined for this namespace shall adhere to Optimal
Write Size field setting defined in NVM Sets Attributes Entry (refer to
Figure 251) for the NVM Set with which this namespace is associated."

Hence only report these fields if bit 4 in NSFEAT has been set.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
---

diff --git a/nvme-print.c b/nvme-print.c
index 94222a3b..17478f98 100644
--- a/nvme-print.c
+++ b/nvme-print.c
@@ -721,6 +721,13 @@ void show_nvme_id_ns(struct nvme_id_ns *ns, unsigned int mode)
 	printf("nabspf  : %d\n", le16_to_cpu(ns->nabspf));
 	printf("noiob   : %d\n", le16_to_cpu(ns->noiob));
 	printf("nvmcap  : %.0Lf\n", int128_to_double(ns->nvmcap));
+	if (ns->nsfeat & 0x10) {
+		printf("npwg    : %u\n", le16_to_cpu(ns->npwg));
+		printf("npwa    : %u\n", le16_to_cpu(ns->npwa));
+		printf("npdg    : %u\n", le16_to_cpu(ns->npdg));
+		printf("npda    : %u\n", le16_to_cpu(ns->npda));
+		printf("nows    : %u\n", le16_to_cpu(ns->nows));
+	}
 	printf("nsattr	: %u\n", ns->nsattr);
 	printf("nvmsetid: %d\n", le16_to_cpu(ns->nvmsetid));
 	printf("anagrpid: %u\n", le32_to_cpu(ns->anagrpid));