ConnectX can work more efficiently if the CPU cache line size is configured to
it at INIT_HCA. This patch configures the CPU cache line size.
Signed-off-by: Eli Cohen <e...@mellanox.co.il>
---
As per Roland's comments, the following changes were made:
1. Remove #ifdef cache_line_size and include linux/cache.h
2. Assume cache line size is a power of 2 and use ilog2 instead of
order_base_2
drivers/net/mlx4/fw.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/drivers/net/mlx4/fw.c b/drivers/net/mlx4/fw.c
index cee199c..3c16602 100644
--- a/drivers/net/mlx4/fw.c
+++ b/drivers/net/mlx4/fw.c
@@ -33,6 +33,7 @@
*/
#include <linux/mlx4/cmd.h>
+#include <linux/cache.h>
#include "fw.h"
#include "icm.h"
@@ -698,6 +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)
@@ -735,6 +737,9 @@ int mlx4_INIT_HCA(struct mlx4_dev *dev, struct
mlx4_init_hca_param *param)
*((u8 *) mailbox->buf + INIT_HCA_VERSION_OFFSET) = INIT_HCA_VERSION;
+ *((u8 *) mailbox->buf + INIT_HCA_CACHELINE_SZ_OFFSET) =
+ (ilog2(cache_line_size()) - 4) << 5;
+
#if defined(__LITTLE_ENDIAN)
*(inbox + INIT_HCA_FLAGS_OFFSET / 4) &= ~cpu_to_be32(1 << 1);
#elif defined(__BIG_ENDIAN)
--
1.6.4.3
--
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