kernel/git/next/linux-next.git/drivers/ntb, branch akpm

drivers/ntb/test: avoid 64-bit modulus operation

2022-06-27T16:30:06+00:00

Redefine RESCHEDULE_RATIO to a closest power of 2 so that the following code in the perf_run_latency /* Avoid processor soft lock-ups */ if (!(pthr->tries % RESCHEDULE_RATIO)) schedule(); doesn't do 64-bit modulus operation. This fixes the following build failures on 32-bit architectures visible in linux-next: ERROR: modpost: "__umoddi3" [drivers/ntb/test/ntb_perf.ko] undefined! Fixes: dc150dfb081f ("ntb_perf: extend with burst latency measurement") Signed-off-by: Max Filippov Signed-off-by: Jon Mason

NTB: epf: Added more flexible memory map method

2022-06-20T13:21:45+00:00

Supported below memory map method bar 0: config and spad data bar 2: door bell bar 4: memory map windows Signed-off-by: Frank Li Signed-off-by: Jon Mason

ntb_perf: extend with doorbell latency measurement

2022-06-20T13:16:40+00:00

Doorbell latency is a delay between start to ring an NTB doorbell and receiving the confirmation. The remote system needs to be run in server mode beforehand. Then the server waits for a doorbell event and immediately rings self doorbell to confirm. Thanks-to: Guo Zhengkui Signed-off-by: Alexander Fomichev Reviewed-by: Dave Jiang Signed-off-by: Jon Mason

ntb_perf: extend with poll latency measurement

2022-06-20T13:16:36+00:00

Poll latency is a delay between start to send 1 byte to the remote system and receiving the confirmation. The remote system needs to be run in server mode beforehand. Then the server polls the input buffer and on receiving data immediately sends the confirmation back. Signed-off-by: Alexander Fomichev Reviewed-by: Dave Jiang Signed-off-by: Jon Mason

ntb_perf: extend with burst latency measurement

2022-06-20T13:16:26+00:00

Burst latency is a delay between start to send 1 byte to the remote system and hardware readiness to send another byte. The measurement performed within bandwidth test procedure. The DMA Engine is off. Data integrity is not checked. This mode can be disabled by 'perf_latency=N' module parameter. Signed-off-by: Alexander Fomichev Reviewed-by: Dave Jiang Signed-off-by: Jon Mason

ntb: intel: fix port config status offset for SPR

2022-01-28T15:19:16+00:00

The field offset for port configuration status on SPR has been changed to bit 14 from ICX where it resides at bit 12. By chance link status detection continued to work on SPR. This is due to bit 12 being a configuration bit which is in sync with the status bit. Fix this by checking for a SPR device and checking correct status bit. Fixes: 26bfe3d0b227 ("ntb: intel: Add Icelake (gen4) support for Intel NTB") Tested-by: Jerry Dai Signed-off-by: Dave Jiang Signed-off-by: Jon Mason

NTB/msi: Use struct_size() helper in devm_kzalloc()

2022-01-23T21:15:15+00:00

Make use of the struct_size() helper instead of an open-coded version, in order to avoid any potential type mistakes or integer overflows that, in the worst scenario, could lead to heap overflows. Also, address the following sparse warnings: drivers/ntb/msi.c:46:23: warning: using sizeof on a flexible structure Link: https://github.com/KSPP/linux/issues/174 Signed-off-by: Gustavo A. R. Silva Reviewed-by: Kees Cook Reviewed-by: Logan Gunthorpe Signed-off-by: Jon Mason

Merge tag 'ntb-5.17' of git://github.com/jonmason/ntb

2022-01-17T06:14:18+00:00

Pull NTB updates from Jon Mason: "New AMD PCI ID for NTB, and a number of bug fixes for ntb_hw_switchtec for Linux v5.17" * tag 'ntb-5.17' of git://github.com/jonmason/ntb: ntb_hw_switchtec: Fix a minor issue in config_req_id_table() ntb_hw_switchtec: Remove code for disabling ID protection ntb_hw_switchtec: Update the way of getting VEP instance ID ntb_hw_switchtec: AND with the part_map for a valid tpart_vec ntb_hw_switchtec: Fix bug with more than 32 partitions ntb_hw_switchtec: Fix pff ioread to read into mmio_part_cfg_all ntb_hw_switchtec: fix the spelling of "its" NTB/msi: Fix ntbm_msi_request_threaded_irq() kernel-doc comment ntb_hw_amd: Add NTB PCI ID for new gen CPU

ntb_hw_switchtec: Fix a minor issue in config_req_id_table()

2022-01-11T20:38:59+00:00

The req_id_table_size field is 16-bit wide, use ioread16() to read the value. Signed-off-by: Kelvin Cao Signed-off-by: Jon Mason

ntb_hw_switchtec: Remove code for disabling ID protection

2022-01-11T20:38:59+00:00

ID protection is a firmware setting for NT window access control. With it enabled, only the posted requests with requester IDs in the requester ID table will be allowed to access the NT windows. Otherwise all posted requests are allowed. Normally user will configure it statically via the Switchtec config file, and it will take effect when the firmware boots up. The driver can also toggle the ID protection setting dynamically, which will overwrite the static setting in the Switchtec config file as a side effect. Currently, the driver disables the ID protection. However, it's not necessary to disable the ID protection at the driver level as the driver has already configured the proper requester IDs in the requester ID table to allow the corresponding posted requests to hit the NT windows. Remove the code that disables the ID protection to make the static setting prevail. Note: ID protection is not applicable to non-posted requests. Signed-off-by: Kelvin Cao Signed-off-by: Jon Mason