netdev - [PATCH V1 1/3] net/mlx4_core: Add timestamping device capability

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Date:	Tue,  9 Oct 2012 17:20:11 +0200
From:	Or Gerlitz <ogerlitz@...lanox.com>
To:	davem@...emloft.net
Cc:	netdev@...r.kernel.org, Eugenia Emantayev <eugenia@...lanox.com>,
	Or Gerlitz <ogerlitz@...lanox.com>
Subject: [PATCH V1 1/3] net/mlx4_core: Add timestamping device capability

From: Eugenia Emantayev <eugenia@...lanox.com>

Add new device capability for timestamping support and query FW to retrieve it.

Signed-off-by: Eugenia Emantayev <eugenia@...lanox.com>
Reviewed-by: Yevgeny Petrilin <yevgenyp@...lanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@...lanox.com>
---
 drivers/net/ethernet/mellanox/mlx4/fw.c |    7 ++++++-
 include/linux/mlx4/device.h             |    3 ++-
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx4/fw.c b/drivers/net/ethernet/mellanox/mlx4/fw.c
index 4f30b99..01bc49b 100644
--- a/drivers/net/ethernet/mellanox/mlx4/fw.c
+++ b/drivers/net/ethernet/mellanox/mlx4/fw.c
@@ -125,7 +125,8 @@ static void dump_dev_cap_flags2(struct mlx4_dev *dev, u64 flags)
 		[0] = "RSS support",
 		[1] = "RSS Toeplitz Hash Function support",
 		[2] = "RSS XOR Hash Function support",
-		[3] = "Device manage flow steering support"
+		[3] = "Device manage flow steering support",
+		[4] = "Time stamping support"
 	};
 	int i;
 
@@ -439,6 +440,7 @@ int mlx4_QUERY_DEV_CAP(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap)
 #define QUERY_DEV_CAP_MAX_MSG_SZ_OFFSET		0x38
 #define QUERY_DEV_CAP_MAX_GID_OFFSET		0x3b
 #define QUERY_DEV_CAP_RATE_SUPPORT_OFFSET	0x3c
+#define QUERY_DEV_CAP_CQ_TS_SUPPORT_OFFSET	0x3e
 #define QUERY_DEV_CAP_MAX_PKEY_OFFSET		0x3f
 #define QUERY_DEV_CAP_EXT_FLAGS_OFFSET		0x40
 #define QUERY_DEV_CAP_FLAGS_OFFSET		0x44
@@ -554,6 +556,9 @@ int mlx4_QUERY_DEV_CAP(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap)
 	dev_cap->fs_max_num_qp_per_entry = field;
 	MLX4_GET(stat_rate, outbox, QUERY_DEV_CAP_RATE_SUPPORT_OFFSET);
 	dev_cap->stat_rate_support = stat_rate;
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_CQ_TS_SUPPORT_OFFSET);
+	if (field & 0x80)
+		dev_cap->flags2 |= MLX4_DEV_CAP_FLAG2_TS;
 	MLX4_GET(ext_flags, outbox, QUERY_DEV_CAP_EXT_FLAGS_OFFSET);
 	MLX4_GET(flags, outbox, QUERY_DEV_CAP_FLAGS_OFFSET);
 	dev_cap->flags = flags | (u64)ext_flags << 32;
diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h
index 6d1acb0..dbdcc64 100644
--- a/include/linux/mlx4/device.h
+++ b/include/linux/mlx4/device.h
@@ -148,7 +148,8 @@ enum {
 	MLX4_DEV_CAP_FLAG2_RSS			= 1LL <<  0,
 	MLX4_DEV_CAP_FLAG2_RSS_TOP		= 1LL <<  1,
 	MLX4_DEV_CAP_FLAG2_RSS_XOR		= 1LL <<  2,
-	MLX4_DEV_CAP_FLAG2_FS_EN		= 1LL <<  3
+	MLX4_DEV_CAP_FLAG2_FS_EN		= 1LL <<  3,
+	MLX4_DEV_CAP_FLAG2_TS			= 1LL <<  4
 };
 
 #define MLX4_ATTR_EXTENDED_PORT_INFO	cpu_to_be16(0xff90)
-- 
1.7.1

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