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drm/amdgpu: GPU vs CPU page size fixes in amdgpu_vm_bo_split_mapping 

start / last / max_entries are numbers of GPU pages, pfn / count are
numbers of CPU pages. Convert between them accordingly.

Fixes badness on systems with > 4K page size.

Cc: stable@vger.kernel.org
Bugzilla: https://bugs.freedesktop.org/106258
Reported-by: Matt Corallo <freedesktop@bluematt.me>
Tested-by: foxbat@ruin.net
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Michel Dänzer 2018-06-21 11:27:46 +02:00 committed by Alex Deucher
parent fe2a196529
commit 38e624a18f
1 changed files with 5 additions and 3 deletions
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8
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
View File

@ -1463,7 +1463,9 @@ static int amdgpu_vm_bo_split_mapping(struct amdgpu_device *adev,
uint64_t count;
max_entries = min(max_entries, 16ull * 1024ull);
for (count = 1; count < max_entries; ++count) {
for (count = 1;
count < max_entries / (PAGE_SIZE / AMDGPU_GPU_PAGE_SIZE);
++count) {
uint64_t idx = pfn + count;
if (pages_addr[idx] !=
@ -1476,7 +1478,7 @@ static int amdgpu_vm_bo_split_mapping(struct amdgpu_device *adev,
dma_addr = pages_addr;
} else {
addr = pages_addr[pfn];
max_entries = count;
max_entries = count * (PAGE_SIZE / AMDGPU_GPU_PAGE_SIZE);
}
} else if (flags & AMDGPU_PTE_VALID) {
@ -1491,7 +1493,7 @@ static int amdgpu_vm_bo_split_mapping(struct amdgpu_device *adev,
if (r)
return r;
pfn += last - start + 1;
pfn += (last - start + 1) / (PAGE_SIZE / AMDGPU_GPU_PAGE_SIZE);
if (nodes && nodes->size == pfn) {
pfn = 0;
++nodes;