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drm/amdkfd: Tidy up kfd_generate_gpu_id() uint64_t bitshift unpack 

Dereference the one time and unpack the lower and upper 32bit
portions with the proper kernel helper macros.

Signed-off-by: Edward O'Callaghan <funfunctor@folklore1984.net>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
This commit is contained in:
Edward O'Callaghan 2016-09-17 15:01:40 +10:00 committed by Oded Gabbay
parent 9f8cf165c6
commit 585f0e6c53
1 changed files with 5 additions and 3 deletions
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8
drivers/gpu/drm/amd/amdkfd/kfd_topology.c
View File

@ -1090,19 +1090,21 @@ static uint32_t kfd_generate_gpu_id(struct kfd_dev *gpu)
{
uint32_t hashout;
uint32_t buf[7];
uint64_t local_mem_size;
int i;
if (!gpu)
return 0;
local_mem_size = gpu->kfd2kgd->get_vmem_size(gpu->kgd);
buf[0] = gpu->pdev->devfn;
buf[1] = gpu->pdev->subsystem_vendor;
buf[2] = gpu->pdev->subsystem_device;
buf[3] = gpu->pdev->device;
buf[4] = gpu->pdev->bus->number;
buf[5] = (uint32_t)(gpu->kfd2kgd->get_vmem_size(gpu->kgd)
& 0xffffffff);
buf[6] = (uint32_t)(gpu->kfd2kgd->get_vmem_size(gpu->kgd) >> 32);
buf[5] = lower_32_bits(local_mem_size);
buf[6] = upper_32_bits(local_mem_size);
for (i = 0, hashout = 0; i < 7; i++)
hashout ^= hash_32(buf[i], KFD_GPU_ID_HASH_WIDTH);