netdev - [PATCH iproute2-next] devlink: report cell size

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Message-Id: <20190204013919.816-1-jakub.kicinski@netronome.com>
Date:   Sun,  3 Feb 2019 17:39:19 -0800
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     idosch@...lanox.com, jiri@...nulli.us, dsahern@...il.com
Cc:     stephen@...workplumber.org, oss-drivers@...ronome.com,
        netdev@...r.kernel.org,
        Jakub Kicinski <jakub.kicinski@...ronome.com>
Subject: [PATCH iproute2-next] devlink: report cell size

Print the value of DEVLINK_ATTR_SB_POOL_CELL_SIZE, if reported.

Example:
pci/0000:82:00.0:
  sb 1 pool 0 type egress size 40945664 thtype static cell_size 2048
  sb 2 pool 0 type egress size 258867200 thtype static cell_size 10240
...

Signed-off-by: Jakub Kicinski <jakub.kicinski@...ronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@...ronome.com>
---
 devlink/devlink.c     |  3 +++
 man/man8/devlink-sb.8 | 10 ++++++++++
 2 files changed, 13 insertions(+)

diff --git a/devlink/devlink.c b/devlink/devlink.c
index fc4b18d1b613..40f6105af109 100644
--- a/devlink/devlink.c
+++ b/devlink/devlink.c
@@ -2891,6 +2891,9 @@ static void pr_out_sb_pool(struct dl *dl, struct nlattr **tb)
 		    mnl_attr_get_u32(tb[DEVLINK_ATTR_SB_POOL_SIZE]));
 	pr_out_str(dl, "thtype",
 		   threshold_type_name(mnl_attr_get_u8(tb[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE])));
+	if (tb[DEVLINK_ATTR_SB_POOL_CELL_SIZE])
+		pr_out_uint(dl, "cell_size",
+			    mnl_attr_get_u32(tb[DEVLINK_ATTR_SB_POOL_CELL_SIZE]));
 	pr_out_handle_end(dl);
 }
 
diff --git a/man/man8/devlink-sb.8 b/man/man8/devlink-sb.8
index 1882833a3fa7..767c932dd4c1 100644
--- a/man/man8/devlink-sb.8
+++ b/man/man8/devlink-sb.8
@@ -128,6 +128,16 @@ Behaviour of this argument it the same for every command.
 - specifies the devlink device to show pools.
 If this argument is omitted all pools of all devices are listed.
 
+Display available pools listing their
+.B type, size, thtype
+and
+.B cell_size. cell_size
+is the allocation granularity of memory within the shared buffer.  Drivers
+may round up, round down or reject
+.B size
+passed to the set command if its not multiple of
+.B cell_size.
+
 .SS devlink sb pool set - set attributes of pool
 
 .PP
-- 
2.19.2