diff options
Diffstat (limited to 'drivers/gpu/drm/xe/xe_bo_evict.c')
| -rw-r--r-- | drivers/gpu/drm/xe/xe_bo_evict.c | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/drivers/gpu/drm/xe/xe_bo_evict.c b/drivers/gpu/drm/xe/xe_bo_evict.c new file mode 100644 index 000000000000..7046dc203138 --- /dev/null +++ b/drivers/gpu/drm/xe/xe_bo_evict.c @@ -0,0 +1,225 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2022 Intel Corporation + */ + +#include "xe_bo.h" +#include "xe_bo_evict.h" +#include "xe_device.h" +#include "xe_ggtt.h" +#include "xe_gt.h" + +/** + * xe_bo_evict_all - evict all BOs from VRAM + * + * @xe: xe device + * + * Evict non-pinned user BOs first (via GPU), evict pinned external BOs next + * (via GPU), wait for evictions, and finally evict pinned kernel BOs via CPU. + * All eviction magic done via TTM calls. + * + * Evict == move VRAM BOs to temporary (typically system) memory. + * + * This function should be called before the device goes into a suspend state + * where the VRAM loses power. + */ +int xe_bo_evict_all(struct xe_device *xe) +{ + struct ttm_device *bdev = &xe->ttm; + struct ww_acquire_ctx ww; + struct xe_bo *bo; + struct xe_gt *gt; + struct list_head still_in_list; + u32 mem_type; + u8 id; + int ret; + + if (!IS_DGFX(xe)) + return 0; + + /* User memory */ + for (mem_type = XE_PL_VRAM0; mem_type <= XE_PL_VRAM1; ++mem_type) { + struct ttm_resource_manager *man = + ttm_manager_type(bdev, mem_type); + + if (man) { + ret = ttm_resource_manager_evict_all(bdev, man); + if (ret) + return ret; + } + } + + /* Pinned user memory in VRAM */ + INIT_LIST_HEAD(&still_in_list); + spin_lock(&xe->pinned.lock); + for (;;) { + bo = list_first_entry_or_null(&xe->pinned.external_vram, + typeof(*bo), pinned_link); + if (!bo) + break; + xe_bo_get(bo); + list_move_tail(&bo->pinned_link, &still_in_list); + spin_unlock(&xe->pinned.lock); + + xe_bo_lock(bo, &ww, 0, false); + ret = xe_bo_evict(bo, true); + xe_bo_unlock(bo, &ww); + xe_bo_put(bo); + if (ret) { + spin_lock(&xe->pinned.lock); + list_splice_tail(&still_in_list, + &xe->pinned.external_vram); + spin_unlock(&xe->pinned.lock); + return ret; + } + + spin_lock(&xe->pinned.lock); + } + list_splice_tail(&still_in_list, &xe->pinned.external_vram); + spin_unlock(&xe->pinned.lock); + + /* + * Wait for all user BO to be evicted as those evictions depend on the + * memory moved below. + */ + for_each_gt(gt, xe, id) + xe_gt_migrate_wait(gt); + + spin_lock(&xe->pinned.lock); + for (;;) { + bo = list_first_entry_or_null(&xe->pinned.kernel_bo_present, + typeof(*bo), pinned_link); + if (!bo) + break; + xe_bo_get(bo); + list_move_tail(&bo->pinned_link, &xe->pinned.evicted); + spin_unlock(&xe->pinned.lock); + + xe_bo_lock(bo, &ww, 0, false); + ret = xe_bo_evict(bo, true); + xe_bo_unlock(bo, &ww); + xe_bo_put(bo); + if (ret) + return ret; + + spin_lock(&xe->pinned.lock); + } + spin_unlock(&xe->pinned.lock); + + return 0; +} + +/** + * xe_bo_restore_kernel - restore kernel BOs to VRAM + * + * @xe: xe device + * + * Move kernel BOs from temporary (typically system) memory to VRAM via CPU. All + * moves done via TTM calls. + * + * This function should be called early, before trying to init the GT, on device + * resume. + */ +int xe_bo_restore_kernel(struct xe_device *xe) +{ + struct ww_acquire_ctx ww; + struct xe_bo *bo; + int ret; + + if (!IS_DGFX(xe)) + return 0; + + spin_lock(&xe->pinned.lock); + for (;;) { + bo = list_first_entry_or_null(&xe->pinned.evicted, + typeof(*bo), pinned_link); + if (!bo) + break; + xe_bo_get(bo); + list_move_tail(&bo->pinned_link, &xe->pinned.kernel_bo_present); + spin_unlock(&xe->pinned.lock); + + xe_bo_lock(bo, &ww, 0, false); + ret = xe_bo_validate(bo, NULL, false); + xe_bo_unlock(bo, &ww); + if (ret) { + xe_bo_put(bo); + return ret; + } + + if (bo->flags & XE_BO_CREATE_GGTT_BIT) + xe_ggtt_map_bo(bo->gt->mem.ggtt, bo); + + /* + * We expect validate to trigger a move VRAM and our move code + * should setup the iosys map. + */ + XE_BUG_ON(iosys_map_is_null(&bo->vmap)); + XE_BUG_ON(!xe_bo_is_vram(bo)); + + xe_bo_put(bo); + + spin_lock(&xe->pinned.lock); + } + spin_unlock(&xe->pinned.lock); + + return 0; +} + +/** + * xe_bo_restore_user - restore pinned user BOs to VRAM + * + * @xe: xe device + * + * Move pinned user BOs from temporary (typically system) memory to VRAM via + * CPU. All moves done via TTM calls. + * + * This function should be called late, after GT init, on device resume. + */ +int xe_bo_restore_user(struct xe_device *xe) +{ + struct ww_acquire_ctx ww; + struct xe_bo *bo; + struct xe_gt *gt; + struct list_head still_in_list; + u8 id; + int ret; + + if (!IS_DGFX(xe)) + return 0; + + /* Pinned user memory in VRAM should be validated on resume */ + INIT_LIST_HEAD(&still_in_list); + spin_lock(&xe->pinned.lock); + for (;;) { + bo = list_first_entry_or_null(&xe->pinned.external_vram, + typeof(*bo), pinned_link); + if (!bo) + break; + list_move_tail(&bo->pinned_link, &still_in_list); + xe_bo_get(bo); + spin_unlock(&xe->pinned.lock); + + xe_bo_lock(bo, &ww, 0, false); + ret = xe_bo_validate(bo, NULL, false); + xe_bo_unlock(bo, &ww); + xe_bo_put(bo); + if (ret) { + spin_lock(&xe->pinned.lock); + list_splice_tail(&still_in_list, + &xe->pinned.external_vram); + spin_unlock(&xe->pinned.lock); + return ret; + } + + spin_lock(&xe->pinned.lock); + } + list_splice_tail(&still_in_list, &xe->pinned.external_vram); + spin_unlock(&xe->pinned.lock); + + /* Wait for validate to complete */ + for_each_gt(gt, xe, id) + xe_gt_migrate_wait(gt); + + return 0; +} |