From 5a712a8727200fc617072bed2ccd8ba8e1b50408 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Christian=20K=C3=B6nig?= <christian.koenig@amd.com>
Date: Tue, 21 Jun 2016 16:28:15 +0200
Subject: [PATCH] drm/amdgpu: validate VM PTs only on eviction
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We don't need to validate them again if the eviction counter didn't changed.
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu.h | 4 +++-
drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 5 ++++-
drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 2 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 13 ++++++++++++-
4 files changed, 20 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index f4d269931dbee..80d9932d86fb9 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -864,6 +864,7 @@ struct amdgpu_vm {
struct amdgpu_bo *page_directory;
unsigned max_pde_used;
struct fence *page_directory_fence;
+ uint64_t last_eviction_counter;
/* array of page tables, one for each page directory entry */
struct amdgpu_vm_pt *page_tables;
@@ -932,7 +933,8 @@ void amdgpu_vm_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm);
void amdgpu_vm_get_pd_bo(struct amdgpu_vm *vm,
struct list_head *validated,
struct amdgpu_bo_list_entry *entry);
-void amdgpu_vm_get_pt_bos(struct amdgpu_vm *vm, struct list_head *duplicates);
+void amdgpu_vm_get_pt_bos(struct amdgpu_device *adev, struct amdgpu_vm *vm,
+ struct list_head *duplicates);
void amdgpu_vm_move_pt_bos_in_lru(struct amdgpu_device *adev,
struct amdgpu_vm *vm);
int amdgpu_vm_grab_id(struct amdgpu_vm *vm, struct amdgpu_ring *ring,
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
index de171ccf2b9c3..cf97a87f76a64 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -459,7 +459,7 @@ static int amdgpu_cs_parser_bos(struct amdgpu_cs_parser *p,
list_splice(&need_pages, &p->validated);
}
- amdgpu_vm_get_pt_bos(&fpriv->vm, &duplicates);
+ amdgpu_vm_get_pt_bos(p->adev, &fpriv->vm, &duplicates);
p->bytes_moved_threshold = amdgpu_cs_get_threshold_for_moves(p->adev);
p->bytes_moved = 0;
@@ -472,6 +472,9 @@ static int amdgpu_cs_parser_bos(struct amdgpu_cs_parser *p,
if (r)
goto error_validate;
+ fpriv->vm.last_eviction_counter =
+ atomic64_read(&p->adev->num_evictions);
+
if (p->bo_list) {
struct amdgpu_bo *gds = p->bo_list->gds_obj;
struct amdgpu_bo *gws = p->bo_list->gws_obj;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
index 8fab6486064f5..88fbed2389c0a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
@@ -503,7 +503,7 @@ static void amdgpu_gem_va_update_vm(struct amdgpu_device *adev,
if (r)
goto error_print;
- amdgpu_vm_get_pt_bos(bo_va->vm, &duplicates);
+ amdgpu_vm_get_pt_bos(adev, bo_va->vm, &duplicates);
list_for_each_entry(entry, &list, head) {
domain = amdgpu_mem_type_to_domain(entry->bo->mem.mem_type);
/* if anything is swapped out don't swap it in here,
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 8f04857fbe1b5..ea10b7af33dfb 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -115,16 +115,26 @@ void amdgpu_vm_get_pd_bo(struct amdgpu_vm *vm,
/**
* amdgpu_vm_get_bos - add the vm BOs to a duplicates list
*
+ * @adev: amdgpu device pointer
* @vm: vm providing the BOs
* @duplicates: head of duplicates list
*
* Add the page directory to the BO duplicates list
* for command submission.
*/
-void amdgpu_vm_get_pt_bos(struct amdgpu_vm *vm, struct list_head *duplicates)
+void amdgpu_vm_get_pt_bos(struct amdgpu_device *adev, struct amdgpu_vm *vm,
+ struct list_head *duplicates)
{
+ uint64_t num_evictions;
unsigned i;
+ /* We only need to validate the page tables
+ * if they aren't already valid.
+ */
+ num_evictions = atomic64_read(&adev->num_evictions);
+ if (num_evictions == vm->last_eviction_counter)
+ return;
+
/* add the vm page table to the list */
for (i = 0; i <= vm->max_pde_used; ++i) {
struct amdgpu_bo_list_entry *entry = &vm->page_tables[i].entry;
@@ -1534,6 +1544,7 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm)
amdgpu_bo_unreserve(vm->page_directory);
if (r)
goto error_free_page_directory;
+ vm->last_eviction_counter = atomic64_read(&adev->num_evictions);
return 0;
--
2.30.2