Correctly detect system memory mappings when using CPU and don't use
huge pages for them.
Avoid incorrectly translating a physical page table GPU address when
splitting a huge page while mapping system memory.
Signed-off-by: Felix Kuehling <Felix.Kuehling at amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 02c64d28..2015bbf 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -1276,7 +1276,7 @@ static void amdgpu_vm_handle_huge_pages(struct amdgpu_pte_update_params *p,
/* In the case of a mixed PT the PDE must point to it*/
if (p->adev->asic_type < CHIP_VEGA10 ||
nptes != AMDGPU_VM_PTE_COUNT(p->adev) ||
- p->func == amdgpu_vm_do_copy_ptes ||
+ p->src ||
!(flags & AMDGPU_PTE_VALID)) {
dst = amdgpu_bo_gpu_offset(entry->bo);
@@ -1293,9 +1293,23 @@ static void amdgpu_vm_handle_huge_pages(struct amdgpu_pte_update_params *p,
entry->addr = (dst | flags);
if (use_cpu_update) {
+ /* In case a huge page is replaced with a system
+ * memory mapping, p->pages_addr != NULL and
+ * amdgpu_vm_cpu_set_ptes would try to translate dst
+ * through amdgpu_vm_map_gart. But dst is already a
+ * GPU address (of the page table). Disable
+ * amdgpu_vm_map_gart temporarily.
+ */
+ dma_addr_t *tmp;
+
+ tmp = p->pages_addr;
+ p->pages_addr = NULL;
+
pd_addr = (unsigned long)amdgpu_bo_kptr(parent->bo);
pde = pd_addr + (entry - parent->entries) * 8;
amdgpu_vm_cpu_set_ptes(p, pde, dst, 1, 0, flags);
+
+ p->pages_addr = tmp;
} else {
if (parent->bo->shadow) {
pd_addr = amdgpu_bo_gpu_offset(parent->bo->shadow);
--
2.7.4
