linux/drivers/ntb, branch v4.7

NTB: Remove _addr functions from ntb_hw_amd

2016-03-26T15:44:33Z

Kernel zero day testing warned about address space confusion. A virtual iomem address was used where a physical address is expected. The offending functions implement an optional part of the api, so they are removed. They can be added later, after testing. Fixes: a1b3695820aa490e58915d720a1438069813008b Signed-off-by: Allen Hubbe Acked-by: Xiangliang Yu Signed-off-by: Jon Mason

NTB: Fix incorrect clean up routine in ntb_perf

2016-03-21T23:28:30Z

The clean up routine when we failed to allocate kthread is not cleaning up all the threads, only the same one over and over again. Reported-by: Dan Carpenter Signed-off-by: Dave Jiang Acked-by: Allen Hubbe Signed-off-by: Jon Mason

NTB: Fix incorrect return check in ntb_perf

2016-03-21T23:28:25Z

kthread_create_no_node() returns error pointers, never NULL. Fix check so it handles error correctly. Reported-by: Dan Carpenter Signed-off-by: Dave Jiang Signed-off-by: Jon Mason

ntb: fix possible NULL dereference

2016-03-18T00:52:15Z

kmalloc can fail and we should check for NULL before using the pointer returned by kmalloc. Signed-off-by: Sudip Mukherjee Acked-by: Dave Jiang Signed-off-by: Jon Mason

ntb: add missing setup of translation window

2016-03-18T00:50:15Z

The perf tool is missing the setup of translation window. Adding call to setup the translation window for backed memory. Signed-off-by: John Kading Signed-off-by: Dave Jiang Signed-off-by: Jon Mason

ntb: stop link work when we do not have memory

2016-03-18T00:38:40Z

Instead of keep trying to go through the init routine when we aren't able to allocate memory, we should just stop and go down. Signed-off-by: Dave Jiang Signed-off-by: Jon Mason

ntb: stop tasklet from spinning forever during shutdown.

2016-03-18T00:38:40Z

We can leave tasklet spinning forever if we disable the tasklet during qp shutdown and the tasklets are still being kicked off. This hopefully should avoid that race condition. Signed-off-by: Dave Jiang Reported-by: Alex Depoutovitch Tested-by: Alex Depoutovitch Signed-off-by: Jon Mason

ntb: perf test: fix address space confusion

2016-03-18T00:38:40Z

The ntb driver assigns between pointers an __iomem tokens, and also casts them to 64-bit integers, which results in compiler warnings on 32-bit systems: drivers/ntb/test/ntb_perf.c: In function 'perf_copy': drivers/ntb/test/ntb_perf.c:213:10: error: cast from pointer to integer of different size [-Werror=pointer-to-int-cast] vbase = (u64)(u64 *)mw->vbase; ^ drivers/ntb/test/ntb_perf.c:214:14: error: cast from pointer to integer of different size [-Werror=pointer-to-int-cast] dst_vaddr = (u64)(u64 *)dst; ^ This adds __iomem annotations where needed and changes the temporary variables to iomem pointers to avoid casting them to u64. I did not see the problem in linux-next earlier, but it show showed up in 4.5-rc1. Signed-off-by: Arnd Bergmann Acked-by: Dave Jiang Fixes: 8a7b6a778a85 ("ntb: ntb perf tool") Signed-off-by: Jon Mason

NTB: Fix macro parameter conflict with field name

2016-01-22T00:53:10Z

If the parameter given to the macro is replaced throughout the macro as it is evaluated. The intent is that the macro parameter should replace the only the first parameter to container_of(). However, the way the macro was written, it would also inadvertantly replace a structure field name. If a parameter of any other name is given to the macro, it will fail to compile, if the structure does not contain a field of the same name. At worst, it will compile, and hide improper access of an unintended field in the structure. Change the macro parameter name, so it does not conflict with the structure field name. Signed-off-by: Allen Hubbe Acked-by: Dave Jiang Signed-off-by: Jon Mason

NTB: Add support for AMD PCI-Express Non-Transparent Bridge

2016-01-22T00:51:04Z

This adds support for AMD's PCI-Express Non-Transparent Bridge (NTB) device on the Zeppelin platform. The driver connnects to the standard NTB sub-system interface, with modification to add hooks for power management in a separate patch. The AMD NTB device has 3 memory windows, 16 doorbell, 16 scratch-pad registers, and supports up to 16 PCIe lanes running a Gen3 speeds. Signed-off-by: Xiangliang Yu Reviewed-by: Allen Hubbe Signed-off-by: Jon Mason