[ofa-general] [PATCH] net-mlx4: set 64-byte cacheline size for x86_64 and PPC64 to enable WQE prefetching

[Jack Morgenstein]

Set cacheline size to 64 for x86_64 and PPC64 architectures.
This will enable WQE prefetching for these architectures.

Signed-off-by: Jack Morgenstein <jackm at dev.mellanox.co.il>

Index: connectx_kernel/drivers/net/mlx4/fw.c
===================================================================
--- connectx_kernel.orig/drivers/net/mlx4/fw.c	2007-06-28 15:34:07.000000000 +0300
+++ connectx_kernel/drivers/net/mlx4/fw.c	2007-06-28 15:48:39.000000000 +0300
@@ -655,6 +655,8 @@
 #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_64_BYTE_CACHELINE_SZ	 0x40
 #define INIT_HCA_FLAGS_OFFSET		 0x014
 #define INIT_HCA_QPC_OFFSET		 0x020
 #define	 INIT_HCA_QPC_BASE_OFFSET	 (INIT_HCA_QPC_OFFSET + 0x10)
@@ -691,6 +693,9 @@
 	memset(inbox, 0, INIT_HCA_IN_SIZE);
 
 	*((u8 *) mailbox->buf + INIT_HCA_VERSION_OFFSET) = INIT_HCA_VERSION;
+#if defined(__x86_64__) || defined(__PPC64__)
+	*((u8 *) mailbox->buf + INIT_HCA_CACHELINE_SZ_OFFSET) = INIT_HCA_64_BYTE_CACHELINE_SZ;
+#endif
 
 #if defined(__LITTLE_ENDIAN)
 	*(inbox + INIT_HCA_FLAGS_OFFSET / 4) &= ~cpu_to_be32(1 << 1);