From 95a16160ca1d75c66bf7a1c5e0bcaffb18e7c7fc Mon Sep 17 00:00:00 2001 From: Arunpravin Paneer Selvam Date: Wed, 16 Jul 2025 13:21:24 +0530 Subject: drm/amdgpu: Reset the clear flag in buddy during resume MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit - Added a handler in DRM buddy manager to reset the cleared flag for the blocks in the freelist. - This is necessary because, upon resuming, the VRAM becomes cluttered with BIOS data, yet the VRAM backend manager believes that everything has been cleared. v2: - Add lock before accessing drm_buddy_clear_reset_blocks()(Matthew Auld) - Force merge the two dirty blocks.(Matthew Auld) - Add a new unit test case for this issue.(Matthew Auld) - Having this function being able to flip the state either way would be good. (Matthew Brost) v3(Matthew Auld): - Do merge step first to avoid the use of extra reset flag. Signed-off-by: Arunpravin Paneer Selvam Suggested-by: Christian König Acked-by: Christian König Reviewed-by: Matthew Auld Cc: stable@vger.kernel.org Fixes: a68c7eaa7a8f ("drm/amdgpu: Enable clear page functionality") Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3812 Signed-off-by: Christian König Link: https://lore.kernel.org/r/20250716075125.240637-2-Arunpravin.PaneerSelvam@amd.com --- drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c index abdc52b0895a..07c936e90d8e 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c @@ -782,6 +782,23 @@ uint64_t amdgpu_vram_mgr_vis_usage(struct amdgpu_vram_mgr *mgr) return atomic64_read(&mgr->vis_usage); } +/** + * amdgpu_vram_mgr_clear_reset_blocks - reset clear blocks + * + * @adev: amdgpu device pointer + * + * Reset the cleared drm buddy blocks. + */ +void amdgpu_vram_mgr_clear_reset_blocks(struct amdgpu_device *adev) +{ + struct amdgpu_vram_mgr *mgr = &adev->mman.vram_mgr; + struct drm_buddy *mm = &mgr->mm; + + mutex_lock(&mgr->lock); + drm_buddy_reset_clear(mm, false); + mutex_unlock(&mgr->lock); +} + /** * amdgpu_vram_mgr_intersects - test each drm buddy block for intersection * -- cgit v1.2.3 From 020ad3a4ed62e5e8d97db27008c1e470f91bfd8d Mon Sep 17 00:00:00 2001 From: YiPeng Chai Date: Thu, 10 Jul 2025 13:51:57 +0800 Subject: drm/amdgpu: query the allocated vram address block info The bad pages that need to be retired are not all allocated in the same poison consumption process, so an interface is needed to query the processes that allocate the bad pages. By killing all the processes that allocate the bad pages, the bad pages can be reserved immediately. Signed-off-by: YiPeng Chai Reviewed-by: Tao Zhou Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 38 ++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c index abdc52b0895a..4bf3e99f47fe 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c @@ -396,6 +396,35 @@ out: return ret; } +int amdgpu_vram_mgr_query_address_block_info(struct amdgpu_vram_mgr *mgr, + uint64_t address, struct amdgpu_vram_block_info *info) +{ + struct amdgpu_vram_mgr_resource *vres; + struct drm_buddy_block *block; + u64 start, size; + int ret = -ENOENT; + + mutex_lock(&mgr->lock); + list_for_each_entry(vres, &mgr->allocated_vres_list, vres_node) { + list_for_each_entry(block, &vres->blocks, link) { + start = amdgpu_vram_mgr_block_start(block); + size = amdgpu_vram_mgr_block_size(block); + if ((start <= address) && (address < (start + size))) { + info->start = start; + info->size = size; + memcpy(&info->task, &vres->task, sizeof(vres->task)); + ret = 0; + goto out; + } + } + } + +out: + mutex_unlock(&mgr->lock); + + return ret; +} + static void amdgpu_dummy_vram_mgr_debug(struct ttm_resource_manager *man, struct drm_printer *printer) { @@ -568,6 +597,10 @@ static int amdgpu_vram_mgr_new(struct ttm_resource_manager *man, remaining_size -= size; } + vres->task.pid = task_pid_nr(current); + get_task_comm(vres->task.comm, current); + list_add_tail(&vres->vres_node, &mgr->allocated_vres_list); + if (bo->flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS && adjust_dcc_size) { struct drm_buddy_block *dcc_block; unsigned long dcc_start; @@ -645,6 +678,10 @@ static void amdgpu_vram_mgr_del(struct ttm_resource_manager *man, uint64_t vis_usage = 0; mutex_lock(&mgr->lock); + + list_del(&vres->vres_node); + memset(&vres->task, 0, sizeof(vres->task)); + list_for_each_entry(block, &vres->blocks, link) vis_usage += amdgpu_vram_mgr_vis_size(adev, block); @@ -917,6 +954,7 @@ int amdgpu_vram_mgr_init(struct amdgpu_device *adev) mutex_init(&mgr->lock); INIT_LIST_HEAD(&mgr->reservations_pending); INIT_LIST_HEAD(&mgr->reserved_pages); + INIT_LIST_HEAD(&mgr->allocated_vres_list); mgr->default_page_size = PAGE_SIZE; if (!adev->gmc.is_app_apu) { -- cgit v1.2.3 From d38eaf27de1b8584f42d6fb3f717b7ec44b3a7a1 Mon Sep 17 00:00:00 2001 From: YiPeng Chai Date: Tue, 12 Aug 2025 09:17:58 +0800 Subject: drm/amdgpu: fix vram reservation issue The vram block allocation flag must be cleared before making vram reservation, otherwise reserving addresses within the currently freed memory range will always fail. Fixes: c9cad937c0c5 ("drm/amdgpu: add drm buddy support to amdgpu") Signed-off-by: YiPeng Chai Reviewed-by: Hawking Zhang Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c index 4bf3e99f47fe..40049b885667 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c @@ -685,9 +685,8 @@ static void amdgpu_vram_mgr_del(struct ttm_resource_manager *man, list_for_each_entry(block, &vres->blocks, link) vis_usage += amdgpu_vram_mgr_vis_size(adev, block); - amdgpu_vram_mgr_do_reserve(man); - drm_buddy_free_list(mm, &vres->blocks, vres->flags); + amdgpu_vram_mgr_do_reserve(man); mutex_unlock(&mgr->lock); atomic64_sub(vis_usage, &mgr->vis_usage); -- cgit v1.2.3 From 10ef476aad1c848449934e7bec2ab2374333c7b6 Mon Sep 17 00:00:00 2001 From: YiPeng Chai Date: Tue, 12 Aug 2025 09:17:58 +0800 Subject: drm/amdgpu: fix vram reservation issue The vram block allocation flag must be cleared before making vram reservation, otherwise reserving addresses within the currently freed memory range will always fail. Fixes: c9cad937c0c5 ("drm/amdgpu: add drm buddy support to amdgpu") Signed-off-by: YiPeng Chai Reviewed-by: Hawking Zhang Signed-off-by: Alex Deucher (cherry picked from commit d38eaf27de1b8584f42d6fb3f717b7ec44b3a7a1) --- drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c index 07c936e90d8e..78f9e86ccc09 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c @@ -648,9 +648,8 @@ static void amdgpu_vram_mgr_del(struct ttm_resource_manager *man, list_for_each_entry(block, &vres->blocks, link) vis_usage += amdgpu_vram_mgr_vis_size(adev, block); - amdgpu_vram_mgr_do_reserve(man); - drm_buddy_free_list(mm, &vres->blocks, vres->flags); + amdgpu_vram_mgr_do_reserve(man); mutex_unlock(&mgr->lock); atomic64_sub(vis_usage, &mgr->vis_usage); -- cgit v1.2.3