linux.git/drivers/ntb, branch v4.2-rc3 Linux kernel source tree NTB: Add split BAR output for debugfs stats 2015-07-04T18:09:32+00:00 Dave Jiang dave.jiang@intel.com 2015-06-18T09:17:30+00:00 bf44fe4671f97ee17d178e08c2d3b346188d062b When split BAR is enabled, the driver needs to dump out the split BAR registers rather than the original 64bit BAR registers. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Jon Mason <jdmason@kudzu.us> 
When split BAR is enabled, the driver needs to dump out the split BAR
registers rather than the original 64bit BAR registers.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
NTB: Change WARN_ON_ONCE to pr_warn_once on unsafe 2015-07-04T18:09:30+00:00 Dave Jiang dave.jiang@intel.com 2015-06-15T12:22:30+00:00 fd839bf88485878ec602dbb3146fd44769eb3784 The unsafe doorbell and scratchpad access should display reason when WARN is called. Otherwise we get a stack dump without any explanation. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Jon Mason <jdmason@kudzu.us> 
The unsafe doorbell and scratchpad access should display reason when
WARN is called.  Otherwise we get a stack dump without any explanation.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
NTB: Print driver name and version in module init 2015-07-04T18:09:28+00:00 Dave Jiang dave.jiang@intel.com 2015-06-15T12:21:33+00:00 7eb387813db6730a5793cd53077b4039d948d17f Printouts driver name and version to indicate what is being loaded. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Jon Mason <jdmason@kudzu.us> 
Printouts driver name and version to indicate what is being loaded.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
NTB: Increase transport MTU to 64k from 16k 2015-07-04T18:09:27+00:00 Dave Jiang dave.jiang@intel.com 2015-06-03T15:29:38+00:00 9891417de8a816de60faea8a2ff7a04c4b3cf3a1 Benchmarking showed a significant performance increase with the MTU size to 64k instead of 16k. Change the driver default to 64k. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Jon Mason <jdmason@kudzu.us> 
Benchmarking showed a significant performance increase with the MTU size
to 64k instead of 16k.  Change the driver default to 64k.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
NTB: Rename Intel code names to platform names 2015-07-04T18:09:25+00:00 Dave Jiang dave.jiang@intel.com 2015-05-20T16:55:47+00:00 2f887b9a44015a8146d52e40bef9e2b7bc6cd275 Instead of using the platform code names, use the correct platform names to identify the respective Intel NTB hardware. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Jon Mason <jdmason@kudzu.us> 
Instead of using the platform code names, use the correct platform names
to identify the respective Intel NTB hardware.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
NTB: Default to CPU memcpy for performance 2015-07-04T18:09:24+00:00 Dave Jiang dave.jiang@intel.com 2015-05-19T20:52:04+00:00 a41ef053f700618f5f55a1dd658908a71163400b Disable DMA usage by default, since the CPU provides much better performance with write combining. Provide a module parameter to enable DMA usage when offloading the memcpy is preferred. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Allen Hubbe <Allen.Hubbe@emc.com> Signed-off-by: Jon Mason <jdmason@kudzu.us> 
Disable DMA usage by default, since the CPU provides much better
performance with write combining.  Provide a module parameter to enable
DMA usage when offloading the memcpy is preferred.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Allen Hubbe <Allen.Hubbe@emc.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
NTB: Improve performance with write combining 2015-07-04T18:09:21+00:00 Dave Jiang dave.jiang@intel.com 2015-05-19T20:45:46+00:00 06917f753547e6bba8a5d17f79971d1c071a70dd Changing the memory window BAR mappings to write combining significantly boosts the performance. We will also use memcpy that uses non-temporal store, which showed performance improvement when doing non-cached memcpys. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Jon Mason <jdmason@kudzu.us> 
Changing the memory window BAR mappings to write combining significantly
boosts the performance.  We will also use memcpy that uses non-temporal
store, which showed performance improvement when doing non-cached
memcpys.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
NTB: Use NUMA memory in Intel driver 2015-07-04T18:09:19+00:00 Allen Hubbe Allen.Hubbe@emc.com 2015-05-19T16:04:52+00:00 0e041fb5369975c183d22ffeb156ea0dae760088 Allocate memory for the NUMA node of the NTB device. Signed-off-by: Allen Hubbe <Allen.Hubbe@emc.com> Signed-off-by: Jon Mason <jdmason@kudzu.us> 
Allocate memory for the NUMA node of the NTB device.

Signed-off-by: Allen Hubbe <Allen.Hubbe@emc.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
NTB: Use NUMA memory and DMA chan in transport 2015-07-04T18:08:33+00:00 Allen Hubbe Allen.Hubbe@emc.com 2015-05-18T10:20:47+00:00 1199aa61264a74717bc747e7031673242bad5119 Allocate memory and request the DMA channel for the same NUMA node as the NTB device. Signed-off-by: Allen Hubbe <Allen.Hubbe@emc.com> Signed-off-by: Jon Mason <jdmason@kudzu.us> 
Allocate memory and request the DMA channel for the same NUMA node as
the NTB device.

Signed-off-by: Allen Hubbe <Allen.Hubbe@emc.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
NTB: Rate limit ntb_qp_link_work 2015-07-04T18:08:30+00:00 Allen Hubbe Allen.Hubbe@emc.com 2015-05-11T14:08:26+00:00 2876228941ac5dcab12854aa5a3462b3f2274b09 When the ntb transport is connecting and waiting for the peer, the debug console receives lots of debug level messages about the remote qp link status being down. Rate limit those messages. Signed-off-by: Allen Hubbe <Allen.Hubbe@emc.com> Signed-off-by: Jon Mason <jdmason@kudzu.us> 
When the ntb transport is connecting and waiting for the peer, the debug
console receives lots of debug level messages about the remote qp link
status being down.  Rate limit those messages.

Signed-off-by: Allen Hubbe <Allen.Hubbe@emc.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>