commit 633693660045b3e46a63ed618eb38a54339fbcc0
author Chien Tung <chien.tin.tung@intel.com> Sun Nov 02 21:40:55 2008 -0800
committer Roland Dreier <rolandd@cisco.com> Sun Nov 02 21:40:55 2008 -0800
tree 3ed901d47709c4011850d55c2a38f16cddaad52c
parent 2e369544ac14de7bd0d76b369c1f6110eefbea8a

RDMA/nes: Mitigate compatibility issue regarding PCIe write credits

Under heavy load, there is an compatibility issue regarding PCIe write
credits with certain chipsets.  It can be mitigated by limiting read
requests to 256 Bytes.

This workaround is always enabled for Tbird2 on Gladius.  We also add
a module parameter to enable workaround for non-Gladius cards.

Signed-off-by: Chien Tung <chien.tin.tung@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

drivers/infiniband/hw/nes/nes_hw.h

diff --git a/drivers/infiniband/hw/nes/nes_hw.h b/drivers/infiniband/hw/nes/nes_hw.h
index 610b9d8..bc0b4de 100644
--- a/drivers/infiniband/hw/nes/nes_hw.h
+++ b/drivers/infiniband/hw/nes/nes_hw.h
@@ -40,6 +40,7 @@
 #define NES_PHY_TYPE_ARGUS     4
 #define NES_PHY_TYPE_PUMA_1G   5
 #define NES_PHY_TYPE_PUMA_10G  6
+#define NES_PHY_TYPE_GLADIUS   7
 
 #define NES_MULTICAST_PF_MAX 8