diff options
| author | Easwar Hariharan <easwar.hariharan@intel.com> | 2017-02-08 05:26:14 -0800 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2017-02-19 09:18:34 -0500 |
| commit | 39e2afa8d042a53d855137d4c5a689a6f5492b39 (patch) | |
| tree | bccf63e704c48cb76a506410d61e420d69f79b34 /drivers/infiniband/hw | |
| parent | eb04ff09d834c1a531d02ee0b3e4b503253df609 (diff) | |
| download | linux-39e2afa8d042a53d855137d4c5a689a6f5492b39.tar.bz2 | |
IB/hfi1: Use static CTLE with Preset 6 for integrated HFIs
After extended testing, it was found that the previous PCIe Gen
3 recipe, which used adaptive CTLE with Preset 4, could cause an
NMI/Surprise Link Down in about 1 in 100 to 1 in 1000 power cycles on
some platforms. New EV data combined with extensive empirical data
indicates that the new recipe should use static CTLE with Preset 6 for
all integrated silicon SKUs.
Fixes: c3f8de0b334c ("IB/hfi1: Add static PCIe Gen3 CTLE tuning")
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Easwar Hariharan <easwar.hariharan@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/infiniband/hw')
| -rw-r--r-- | drivers/infiniband/hw/hfi1/pcie.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/infiniband/hw/hfi1/pcie.c b/drivers/infiniband/hw/hfi1/pcie.c index ebd941fc8a92..0829fce06172 100644 --- a/drivers/infiniband/hw/hfi1/pcie.c +++ b/drivers/infiniband/hw/hfi1/pcie.c @@ -663,12 +663,12 @@ MODULE_PARM_DESC(pcie_retry, "Driver will try this many times to reach requested #define UNSET_PSET 255 #define DEFAULT_DISCRETE_PSET 2 /* discrete HFI */ -#define DEFAULT_MCP_PSET 4 /* MCP HFI */ +#define DEFAULT_MCP_PSET 6 /* MCP HFI */ static uint pcie_pset = UNSET_PSET; module_param(pcie_pset, uint, S_IRUGO); MODULE_PARM_DESC(pcie_pset, "PCIe Eq Pset value to use, range is 0-10"); -static uint pcie_ctle = 1; /* discrete on, integrated off */ +static uint pcie_ctle = 3; /* discrete on, integrated on */ module_param(pcie_ctle, uint, S_IRUGO); MODULE_PARM_DESC(pcie_ctle, "PCIe static CTLE mode, bit 0 - discrete on/off, bit 1 - integrated on/off"); |