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drm/amdgpu: handle multi level PD during PT updates 

Not the best solution, but good enough for now.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2016-10-25 15:52:28 +02:00 committed by Alex Deucher
parent 194d216113
commit 4e2cb640c2
1 changed files with 34 additions and 5 deletions
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39
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
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@ -879,6 +879,32 @@ int amdgpu_vm_update_directories(struct amdgpu_device *adev,
return amdgpu_vm_update_level(adev, vm, &vm->root, 0);
}
/**
* amdgpu_vm_find_pt - find the page table for an address
*
* @p: see amdgpu_pte_update_params definition
* @addr: virtual address in question
*
* Find the page table BO for a virtual address, return NULL when none found.
*/
static struct amdgpu_bo *amdgpu_vm_get_pt(struct amdgpu_pte_update_params *p,
uint64_t addr)
{
struct amdgpu_vm_pt *entry = &p->vm->root;
unsigned idx, level = p->adev->vm_manager.num_level;
while (entry->entries) {
idx = addr >> (amdgpu_vm_block_size * level--);
idx %= amdgpu_bo_size(entry->bo) / 8;
entry = &entry->entries[idx];
}
if (level)
return NULL;
return entry->bo;
}
/**
* amdgpu_vm_update_ptes - make sure that page tables are valid
*
@ -899,15 +925,16 @@ static void amdgpu_vm_update_ptes(struct amdgpu_pte_update_params *params,
uint64_t cur_pe_start, cur_nptes, cur_dst;
uint64_t addr; /* next GPU address to be updated */
uint64_t pt_idx;
struct amdgpu_bo *pt;
unsigned nptes; /* next number of ptes to be updated */
uint64_t next_pe_start;
/* initialize the variables */
addr = start;
pt_idx = addr >> amdgpu_vm_block_size;
pt = params->vm->root.entries[pt_idx].bo;
pt = amdgpu_vm_get_pt(params, addr);
if (!pt)
return;
if (params->shadow) {
if (!pt->shadow)
return;
@ -929,8 +956,10 @@ static void amdgpu_vm_update_ptes(struct amdgpu_pte_update_params *params,
/* walk over the address space and update the page tables */
while (addr < end) {
pt_idx = addr >> amdgpu_vm_block_size;
pt = params->vm->root.entries[pt_idx].bo;
pt = amdgpu_vm_get_pt(params, addr);
if (!pt)
return;
if (params->shadow) {
if (!pt->shadow)
return;