ConnectX can work more efficiently if the CPU cache line size is confiugred to
it at INIT_HCA. This patch configures cache line size for systems that report
it.
Signed-off-by: Eli Cohen <e...@mellanox.co.il>
---
drivers/net/mlx4/fw.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/drivers/net/mlx4/fw.c b/drivers/net/mlx4/fw.c
index 20526ce..aa38c06 100644
--- a/drivers/net/mlx4/fw.c
+++ b/drivers/net/mlx4/fw.c
@@ -699,6 +699,7 @@ int mlx4_INIT_HCA(struct mlx4_dev *dev, struct
mlx4_init_hca_param *param)
#define INIT_HCA_IN_SIZE 0x200
#define INIT_HCA_VERSION_OFFSET 0x000
#define INIT_HCA_VERSION 2
+#define INIT_HCA_CACHELINE_SZ_OFFSET 0x0e
#define INIT_HCA_FLAGS_OFFSET 0x014
#define INIT_HCA_QPC_OFFSET 0x020
#define INIT_HCA_QPC_BASE_OFFSET (INIT_HCA_QPC_OFFSET + 0x10)
@@ -736,6 +737,12 @@ int mlx4_INIT_HCA(struct mlx4_dev *dev, struct
mlx4_init_hca_param *param)
*((u8 *) mailbox->buf + INIT_HCA_VERSION_OFFSET) = INIT_HCA_VERSION;
+#if defined(cache_line_size)
+ *((u8 *) mailbox->buf + INIT_HCA_CACHELINE_SZ_OFFSET) =
+ order_base_2(cache_line_size() / 16) << 5;
+#endif
+
+
#if defined(__LITTLE_ENDIAN)
*(inbox + INIT_HCA_FLAGS_OFFSET / 4) &= ~cpu_to_be32(1 << 1);
#elif defined(__BIG_ENDIAN)
--
1.6.4.3
--
To unsubscribe from this list: send the line "unsubscribe linux-rdma" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
