mlx4_core: Add second capabilities flags field

This patch adds a 64-bit flags2 features member to struct mlx4_dev to
export further features of the hardware.  The original flags field
tracks features whose support bits are advertised by the firmware in
offsets 0x40 and 0x44 of the query device capabilities command.
flags2 will track features whose support bits are scattered at various
offsets.

RSS support is the first feature to be exported through flags2.  RSS
capabilities are located at offset 0x2e.  The size of the RSS
indirection table is also given in this offset.

Signed-off-by: Shlomo Pongratz <shlomop@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h
index 834c96c5d879..7f5e8d564e8e 100644
--- a/include/linux/mlx4/device.h
+++ b/include/linux/mlx4/device.h
@@ -98,6 +98,12 @@ enum {
         MLX4_DEV_CAP_FLAG_SENSE_SUPPORT = 1LL << 55
 };
 
+enum {
+        MLX4_DEV_CAP_FLAG2_RSS                  = 1LL <<  0,
+        MLX4_DEV_CAP_FLAG2_RSS_TOP              = 1LL <<  1,
+        MLX4_DEV_CAP_FLAG2_RSS_XOR              = 1LL <<  2
+};
+
 #define MLX4_ATTR_EXTENDED_PORT_INFO    cpu_to_be16(0xff90)
 
 enum {
@@ -292,11 +298,13 @@ struct mlx4_caps {
         u32                     max_msg_sz;
         u32                     page_size_cap;
         u64                     flags;
+        u64                     flags2;
         u32                     bmme_flags;
         u32                     reserved_lkey;
         u16                     stat_rate_support;
         u8                      port_width_cap[MLX4_MAX_PORTS + 1];
         int                     max_gso_sz;
+        int                     max_rss_tbl_sz;
         int                     reserved_qps_cnt[MLX4_NUM_QP_REGION];
         int                     reserved_qps;
         int                     reserved_qps_base[MLX4_NUM_QP_REGION];