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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_profile.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_profile.c')
-rw-r--r--drivers/infiniband/hw/mthca/mthca_profile.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/mthca/mthca_profile.c b/drivers/infiniband/hw/mthca/mthca_profile.c
index 08a909371b0..58d44aa3c30 100644
--- a/drivers/infiniband/hw/mthca/mthca_profile.c
+++ b/drivers/infiniband/hw/mthca/mthca_profile.c
@@ -152,7 +152,7 @@ u64 mthca_make_profile(struct mthca_dev *dev,
}
if (total_size > mem_avail) {
mthca_err(dev, "Profile requires 0x%llx bytes; "
- "won't in 0x%llx bytes of context memory.\n",
+ "won't fit in 0x%llx bytes of context memory.\n",
(unsigned long long) total_size,
(unsigned long long) mem_avail);
kfree(profile);
@@ -262,6 +262,14 @@ u64 mthca_make_profile(struct mthca_dev *dev,
*/
dev->limits.num_pds = MTHCA_NUM_PDS;
+ if (dev->mthca_flags & MTHCA_FLAG_SINAI_OPT &&
+ init_hca->log_mpt_sz > 23) {
+ mthca_warn(dev, "MPT table too large (requested size 2^%d >= 2^24)\n",
+ init_hca->log_mpt_sz);
+ mthca_warn(dev, "Disabling memory key throughput optimization.\n");
+ dev->mthca_flags &= ~MTHCA_FLAG_SINAI_OPT;
+ }
+
/*
* For Tavor, FMRs use ioremapped PCI memory. For 32 bit
* systems it may use too much vmalloc space to map all MTT