From a6ff969fe9cbf369e3cd0ac54261fec1122682ec Mon Sep 17 00:00:00 2001
From: Christian König <christian.koenig@amd.com>
Date: Thu, 4 Apr 2024 16:25:40 +0200
Subject: drm/amdgpu: fix visible VRAM handling during faults
MIME-Version: 1.0
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When we removed the hacky start code check we actually didn't took into
account that *all* VRAM pages needs to be CPU accessible.
Clean up the code and unify the handling into a single helper which
checks if the whole resource is CPU accessible.
The only place where a partial check would make sense is during
eviction, but that is neglitible.
Signed-off-by: Christian König <christian.koenig@amd.com>
Fixes: aed01a68047b ("drm/amdgpu: Remove TTM resource->start visible VRAM condition v2")
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
CC: stable@vger.kernel.org
---
drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 22 +++++++++++-----------
1 file changed, 11 insertions(+), 11 deletions(-)
(limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_object.c')
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 010b0cb7693c..2099159a693f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -617,8 +617,7 @@ int amdgpu_bo_create(struct amdgpu_device *adev,
return r;
if (!amdgpu_gmc_vram_full_visible(&adev->gmc) &&
- bo->tbo.resource->mem_type == TTM_PL_VRAM &&
- amdgpu_bo_in_cpu_visible_vram(bo))
+ amdgpu_res_cpu_visible(adev, bo->tbo.resource))
amdgpu_cs_report_moved_bytes(adev, ctx.bytes_moved,
ctx.bytes_moved);
else
@@ -1272,23 +1271,25 @@ void amdgpu_bo_move_notify(struct ttm_buffer_object *bo, bool evict)
void amdgpu_bo_get_memory(struct amdgpu_bo *bo,
struct amdgpu_mem_stats *stats)
{
+ struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
+ struct ttm_resource *res = bo->tbo.resource;
uint64_t size = amdgpu_bo_size(bo);
struct drm_gem_object *obj;
unsigned int domain;
bool shared;
/* Abort if the BO doesn't currently have a backing store */
- if (!bo->tbo.resource)
+ if (!res)
return;
obj = &bo->tbo.base;
shared = drm_gem_object_is_shared_for_memory_stats(obj);
- domain = amdgpu_mem_type_to_domain(bo->tbo.resource->mem_type);
+ domain = amdgpu_mem_type_to_domain(res->mem_type);
switch (domain) {
case AMDGPU_GEM_DOMAIN_VRAM:
stats->vram += size;
- if (amdgpu_bo_in_cpu_visible_vram(bo))
+ if (amdgpu_res_cpu_visible(adev, bo->tbo.resource))
stats->visible_vram += size;
if (shared)
stats->vram_shared += size;
@@ -1389,10 +1390,7 @@ vm_fault_t amdgpu_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
/* Remember that this BO was accessed by the CPU */
abo->flags |= AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
- if (bo->resource->mem_type != TTM_PL_VRAM)
- return 0;
-
- if (amdgpu_bo_in_cpu_visible_vram(abo))
+ if (amdgpu_res_cpu_visible(adev, bo->resource))
return 0;
/* Can't move a pinned BO to visible VRAM */
@@ -1415,7 +1413,7 @@ vm_fault_t amdgpu_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
/* this should never happen */
if (bo->resource->mem_type == TTM_PL_VRAM &&
- !amdgpu_bo_in_cpu_visible_vram(abo))
+ !amdgpu_res_cpu_visible(adev, bo->resource))
return VM_FAULT_SIGBUS;
ttm_bo_move_to_lru_tail_unlocked(bo);
@@ -1579,6 +1577,7 @@ uint32_t amdgpu_bo_get_preferred_domain(struct amdgpu_device *adev,
*/
u64 amdgpu_bo_print_info(int id, struct amdgpu_bo *bo, struct seq_file *m)
{
+ struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
struct dma_buf_attachment *attachment;
struct dma_buf *dma_buf;
const char *placement;
@@ -1587,10 +1586,11 @@ u64 amdgpu_bo_print_info(int id, struct amdgpu_bo *bo, struct seq_file *m)
if (dma_resv_trylock(bo->tbo.base.resv)) {
unsigned int domain;
+
domain = amdgpu_mem_type_to_domain(bo->tbo.resource->mem_type);
switch (domain) {
case AMDGPU_GEM_DOMAIN_VRAM:
- if (amdgpu_bo_in_cpu_visible_vram(bo))
+ if (amdgpu_res_cpu_visible(adev, bo->tbo.resource))
placement = "VRAM VISIBLE";
else
placement = "VRAM";
--
cgit v1.2.3
From b0b13d532105e0e682d95214933bb8483a063184 Mon Sep 17 00:00:00 2001
From: Felix Kuehling <felix.kuehling@amd.com>
Date: Thu, 18 Apr 2024 13:56:42 -0400
Subject: drm/amdgpu: Update BO eviction priorities
MIME-Version: 1.0
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Make SVM BOs more likely to get evicted than other BOs. These BOs
opportunistically use available VRAM, but can fall back relatively
seamlessly to system memory. It also avoids SVM migrations evicting
other, more important BOs as they will evict other SVM allocations
first.
Signed-off-by: Felix Kuehling <felix.kuehling@amd.com>
Acked-by: Mukul Joshi <mukul.joshi@amd.com>
Tested-by: Mukul Joshi <mukul.joshi@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 2 ++
1 file changed, 2 insertions(+)
(limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_object.c')
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 2099159a693f..ce733e3cb35d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -605,6 +605,8 @@ int amdgpu_bo_create(struct amdgpu_device *adev,
else
amdgpu_bo_placement_from_domain(bo, bp->domain);
if (bp->type == ttm_bo_type_kernel)
+ bo->tbo.priority = 2;
+ else if (!(bp->flags & AMDGPU_GEM_CREATE_DISCARDABLE))
bo->tbo.priority = 1;
if (!bp->destroy)
--
cgit v1.2.3
From d3a9331a6591e9df64791e076f6591f440af51c3 Mon Sep 17 00:00:00 2001
From: Christian König <christian.koenig@amd.com>
Date: Thu, 21 Mar 2024 11:32:02 +0100
Subject: drm/amdgpu: once more fix the call oder in amdgpu_ttm_move() v2
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
This reverts drm/amdgpu: fix ftrace event amdgpu_bo_move always move
on same heap. The basic problem here is that after the move the old
location is simply not available any more.
Some fixes were suggested, but essentially we should call the move
notification before actually moving things because only this way we have
the correct order for DMA-buf and VM move notifications as well.
Also rework the statistic handling so that we don't update the eviction
counter before the move.
v2: add missing NULL check
Signed-off-by: Christian König <christian.koenig@amd.com>
Fixes: 94aeb4117343 ("drm/amdgpu: fix ftrace event amdgpu_bo_move always move on same heap")
Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3171
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
CC: stable@vger.kernel.org
---
drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 14 +++++----
drivers/gpu/drm/amd/amdgpu/amdgpu_object.h | 4 ++-
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 48 ++++++++++++++++--------------
3 files changed, 38 insertions(+), 28 deletions(-)
(limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_object.c')
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index ce733e3cb35d..f6d503432a9e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -1243,14 +1243,18 @@ int amdgpu_bo_get_metadata(struct amdgpu_bo *bo, void *buffer,
* amdgpu_bo_move_notify - notification about a memory move
* @bo: pointer to a buffer object
* @evict: if this move is evicting the buffer from the graphics address space
+ * @new_mem: new resource for backing the BO
*
* Marks the corresponding &amdgpu_bo buffer object as invalid, also performs
* bookkeeping.
* TTM driver callback which is called when ttm moves a buffer.
*/
-void amdgpu_bo_move_notify(struct ttm_buffer_object *bo, bool evict)
+void amdgpu_bo_move_notify(struct ttm_buffer_object *bo,
+ bool evict,
+ struct ttm_resource *new_mem)
{
struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
+ struct ttm_resource *old_mem = bo->resource;
struct amdgpu_bo *abo;
if (!amdgpu_bo_is_amdgpu_bo(bo))
@@ -1262,12 +1266,12 @@ void amdgpu_bo_move_notify(struct ttm_buffer_object *bo, bool evict)
amdgpu_bo_kunmap(abo);
if (abo->tbo.base.dma_buf && !abo->tbo.base.import_attach &&
- bo->resource->mem_type != TTM_PL_SYSTEM)
+ old_mem && old_mem->mem_type != TTM_PL_SYSTEM)
dma_buf_move_notify(abo->tbo.base.dma_buf);
- /* remember the eviction */
- if (evict)
- atomic64_inc(&adev->num_evictions);
+ /* move_notify is called before move happens */
+ trace_amdgpu_bo_move(abo, new_mem ? new_mem->mem_type : -1,
+ old_mem ? old_mem->mem_type : -1);
}
void amdgpu_bo_get_memory(struct amdgpu_bo *bo,
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
index fa03d9e4874c..bc42ccbde659 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
@@ -328,7 +328,9 @@ int amdgpu_bo_set_metadata (struct amdgpu_bo *bo, void *metadata,
int amdgpu_bo_get_metadata(struct amdgpu_bo *bo, void *buffer,
size_t buffer_size, uint32_t *metadata_size,
uint64_t *flags);
-void amdgpu_bo_move_notify(struct ttm_buffer_object *bo, bool evict);
+void amdgpu_bo_move_notify(struct ttm_buffer_object *bo,
+ bool evict,
+ struct ttm_resource *new_mem);
void amdgpu_bo_release_notify(struct ttm_buffer_object *bo);
vm_fault_t amdgpu_bo_fault_reserve_notify(struct ttm_buffer_object *bo);
void amdgpu_bo_fence(struct amdgpu_bo *bo, struct dma_fence *fence,
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 1d71729e3f6b..4ffee5545265 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -481,14 +481,16 @@ static int amdgpu_bo_move(struct ttm_buffer_object *bo, bool evict,
if (!old_mem || (old_mem->mem_type == TTM_PL_SYSTEM &&
bo->ttm == NULL)) {
+ amdgpu_bo_move_notify(bo, evict, new_mem);
ttm_bo_move_null(bo, new_mem);
- goto out;
+ return 0;
}
if (old_mem->mem_type == TTM_PL_SYSTEM &&
(new_mem->mem_type == TTM_PL_TT ||
new_mem->mem_type == AMDGPU_PL_PREEMPT)) {
+ amdgpu_bo_move_notify(bo, evict, new_mem);
ttm_bo_move_null(bo, new_mem);
- goto out;
+ return 0;
}
if ((old_mem->mem_type == TTM_PL_TT ||
old_mem->mem_type == AMDGPU_PL_PREEMPT) &&
@@ -498,9 +500,10 @@ static int amdgpu_bo_move(struct ttm_buffer_object *bo, bool evict,
return r;
amdgpu_ttm_backend_unbind(bo->bdev, bo->ttm);
+ amdgpu_bo_move_notify(bo, evict, new_mem);
ttm_resource_free(bo, &bo->resource);
ttm_bo_assign_mem(bo, new_mem);
- goto out;
+ return 0;
}
if (old_mem->mem_type == AMDGPU_PL_GDS ||
@@ -512,8 +515,9 @@ static int amdgpu_bo_move(struct ttm_buffer_object *bo, bool evict,
new_mem->mem_type == AMDGPU_PL_OA ||
new_mem->mem_type == AMDGPU_PL_DOORBELL) {
/* Nothing to save here */
+ amdgpu_bo_move_notify(bo, evict, new_mem);
ttm_bo_move_null(bo, new_mem);
- goto out;
+ return 0;
}
if (bo->type == ttm_bo_type_device &&
@@ -525,22 +529,23 @@ static int amdgpu_bo_move(struct ttm_buffer_object *bo, bool evict,
abo->flags &= ~AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
}
- if (adev->mman.buffer_funcs_enabled) {
- if (((old_mem->mem_type == TTM_PL_SYSTEM &&
- new_mem->mem_type == TTM_PL_VRAM) ||
- (old_mem->mem_type == TTM_PL_VRAM &&
- new_mem->mem_type == TTM_PL_SYSTEM))) {
- hop->fpfn = 0;
- hop->lpfn = 0;
- hop->mem_type = TTM_PL_TT;
- hop->flags = TTM_PL_FLAG_TEMPORARY;
- return -EMULTIHOP;
- }
+ if (adev->mman.buffer_funcs_enabled &&
+ ((old_mem->mem_type == TTM_PL_SYSTEM &&
+ new_mem->mem_type == TTM_PL_VRAM) ||
+ (old_mem->mem_type == TTM_PL_VRAM &&
+ new_mem->mem_type == TTM_PL_SYSTEM))) {
+ hop->fpfn = 0;
+ hop->lpfn = 0;
+ hop->mem_type = TTM_PL_TT;
+ hop->flags = TTM_PL_FLAG_TEMPORARY;
+ return -EMULTIHOP;
+ }
+ amdgpu_bo_move_notify(bo, evict, new_mem);
+ if (adev->mman.buffer_funcs_enabled)
r = amdgpu_move_blit(bo, evict, new_mem, old_mem);
- } else {
+ else
r = -ENODEV;
- }
if (r) {
/* Check that all memory is CPU accessible */
@@ -555,11 +560,10 @@ static int amdgpu_bo_move(struct ttm_buffer_object *bo, bool evict,
return r;
}
- trace_amdgpu_bo_move(abo, new_mem->mem_type, old_mem->mem_type);
-out:
- /* update statistics */
+ /* update statistics after the move */
+ if (evict)
+ atomic64_inc(&adev->num_evictions);
atomic64_add(bo->base.size, &adev->num_bytes_moved);
- amdgpu_bo_move_notify(bo, evict);
return 0;
}
@@ -1559,7 +1563,7 @@ static int amdgpu_ttm_access_memory(struct ttm_buffer_object *bo,
static void
amdgpu_bo_delete_mem_notify(struct ttm_buffer_object *bo)
{
- amdgpu_bo_move_notify(bo, false);
+ amdgpu_bo_move_notify(bo, false, NULL);
}
static struct ttm_device_funcs amdgpu_bo_driver = {
--
cgit v1.2.3