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path: root/drivers/gpu/drm/xe/xe_bo_evict.c
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Diffstat (limited to 'drivers/gpu/drm/xe/xe_bo_evict.c')
-rw-r--r--drivers/gpu/drm/xe/xe_bo_evict.c228
1 files changed, 228 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 0000000000..7a264a9ca0
--- /dev/null
+++ b/drivers/gpu/drm/xe/xe_bo_evict.c
@@ -0,0 +1,228 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2022 Intel Corporation
+ */
+
+#include "xe_bo_evict.h"
+
+#include "xe_bo.h"
+#include "xe_device.h"
+#include "xe_ggtt.h"
+#include "xe_tile.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 xe_bo *bo;
+ struct xe_tile *tile;
+ 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, false);
+ ret = xe_bo_evict_pinned(bo);
+ xe_bo_unlock(bo);
+ 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_tile(tile, xe, id)
+ xe_tile_migrate_wait(tile);
+
+ 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, false);
+ ret = xe_bo_evict_pinned(bo);
+ xe_bo_unlock(bo);
+ 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 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, false);
+ ret = xe_bo_restore_pinned(bo);
+ xe_bo_unlock(bo);
+ if (ret) {
+ xe_bo_put(bo);
+ return ret;
+ }
+
+ if (bo->flags & XE_BO_CREATE_GGTT_BIT) {
+ struct xe_tile *tile = bo->tile;
+
+ mutex_lock(&tile->mem.ggtt->lock);
+ xe_ggtt_map_bo(tile->mem.ggtt, bo);
+ mutex_unlock(&tile->mem.ggtt->lock);
+ }
+
+ /*
+ * We expect validate to trigger a move VRAM and our move code
+ * should setup the iosys map.
+ */
+ xe_assert(xe, !iosys_map_is_null(&bo->vmap));
+ xe_assert(xe, 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 xe_bo *bo;
+ struct xe_tile *tile;
+ 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, false);
+ ret = xe_bo_restore_pinned(bo);
+ xe_bo_unlock(bo);
+ 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_tile(tile, xe, id)
+ xe_tile_migrate_wait(tile);
+
+ return 0;
+}