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authorEli Cohen <eli@mellanox.co.il>2006-03-02 12:40:46 -0800
committerRoland Dreier <rolandd@cisco.com>2006-03-20 10:08:22 -0800
commit651eaac92894f8b6761c51b6637ea9cacea7fba2 (patch)
tree8be06461ef870b7d130ebce39f55fe93af6ac542 /drivers/infiniband/hw/mthca/mthca_cmd.c
parent27d56300647f6e76847bc2407d7abc782fe87495 (diff)
IB/mthca: Optimize large messages on Sinai HCAs
Sinai (one-port PCI Express) HCAs get improved throughput for messages bigger than 80 KB in DDR mode if memory keys are formatted in a specific way. The enhancement only works if the memory key table is smaller than 2^24 entries. For larger tables, the enhancement is off and a warning is printed (to avoid silent performance loss). Signed-off-by: Eli Cohen <eli@mellanox.co.il> Signed-off-by: Michael Tsirkin <mst@mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/hw/mthca/mthca_cmd.c')
-rw-r--r--drivers/infiniband/hw/mthca/mthca_cmd.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/infiniband/hw/mthca/mthca_cmd.c b/drivers/infiniband/hw/mthca/mthca_cmd.c
index 948a2861cae..343eca50787 100644
--- a/drivers/infiniband/hw/mthca/mthca_cmd.c
+++ b/drivers/infiniband/hw/mthca/mthca_cmd.c
@@ -1277,7 +1277,8 @@ int mthca_INIT_HCA(struct mthca_dev *dev,
int err;
#define INIT_HCA_IN_SIZE 0x200
-#define INIT_HCA_FLAGS_OFFSET 0x014
+#define INIT_HCA_FLAGS1_OFFSET 0x00c
+#define INIT_HCA_FLAGS2_OFFSET 0x014
#define INIT_HCA_QPC_OFFSET 0x020
#define INIT_HCA_QPC_BASE_OFFSET (INIT_HCA_QPC_OFFSET + 0x10)
#define INIT_HCA_LOG_QP_OFFSET (INIT_HCA_QPC_OFFSET + 0x17)
@@ -1320,15 +1321,18 @@ int mthca_INIT_HCA(struct mthca_dev *dev,
memset(inbox, 0, INIT_HCA_IN_SIZE);
+ if (dev->mthca_flags & MTHCA_FLAG_SINAI_OPT)
+ MTHCA_PUT(inbox, 0x1, INIT_HCA_FLAGS1_OFFSET);
+
#if defined(__LITTLE_ENDIAN)
- *(inbox + INIT_HCA_FLAGS_OFFSET / 4) &= ~cpu_to_be32(1 << 1);
+ *(inbox + INIT_HCA_FLAGS2_OFFSET / 4) &= ~cpu_to_be32(1 << 1);
#elif defined(__BIG_ENDIAN)
- *(inbox + INIT_HCA_FLAGS_OFFSET / 4) |= cpu_to_be32(1 << 1);
+ *(inbox + INIT_HCA_FLAGS2_OFFSET / 4) |= cpu_to_be32(1 << 1);
#else
#error Host endianness not defined
#endif
/* Check port for UD address vector: */
- *(inbox + INIT_HCA_FLAGS_OFFSET / 4) |= cpu_to_be32(1);
+ *(inbox + INIT_HCA_FLAGS2_OFFSET / 4) |= cpu_to_be32(1);
/* We leave wqe_quota, responder_exu, etc as 0 (default) */