write in 30M

hc

2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc

 kernel/include/drm/ttm/ttm_tt.h
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@@ -30,7 +30,7 @@
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 #include <linux/types.h>
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 struct ttm_tt;
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-struct ttm_mem_reg;
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+struct ttm_resource;
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 struct ttm_buffer_object;
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 struct ttm_operation_ctx;
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@@ -42,54 +42,17 @@
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 #define TTM_PAGE_FLAG_SG              (1 << 8)
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 #define TTM_PAGE_FLAG_NO_RETRY	      (1 << 9)
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+#define TTM_PAGE_FLAG_PRIV_POPULATED  (1 << 31)
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+
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 enum ttm_caching_state {
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 	tt_uncached,
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 	tt_wc,
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 	tt_cached
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 };
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-struct ttm_backend_func {
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-	/**
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-	 * struct ttm_backend_func member bind
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-	 *
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-	 * @ttm: Pointer to a struct ttm_tt.
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-	 * @bo_mem: Pointer to a struct ttm_mem_reg describing the
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-	 * memory type and location for binding.
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-	 *
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-	 * Bind the backend pages into the aperture in the location
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-	 * indicated by @bo_mem. This function should be able to handle
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-	 * differences between aperture and system page sizes.
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-	 */
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-	int (*bind) (struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem);
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-
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-	/**
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-	 * struct ttm_backend_func member unbind
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-	 *
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-	 * @ttm: Pointer to a struct ttm_tt.
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-	 *
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-	 * Unbind previously bound backend pages. This function should be
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-	 * able to handle differences between aperture and system page sizes.
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-	 */
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-	int (*unbind) (struct ttm_tt *ttm);
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-
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-	/**
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-	 * struct ttm_backend_func member destroy
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-	 *
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-	 * @ttm: Pointer to a struct ttm_tt.
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-	 *
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-	 * Destroy the backend. This will be call back from ttm_tt_destroy so
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-	 * don't call ttm_tt_destroy from the callback or infinite loop.
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-	 */
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-	void (*destroy) (struct ttm_tt *ttm);
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-};
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-
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 /**
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  * struct ttm_tt
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  *
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- * @bdev: Pointer to a struct ttm_bo_device.
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- * @func: Pointer to a struct ttm_backend_func that describes
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- * the backend methods.
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- * pointer.
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  * @pages: Array of pages backing the data.
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  * @num_pages: Number of pages in the page array.
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  * @bdev: Pointer to the current struct ttm_bo_device.
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@@ -103,20 +66,28 @@
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  * memory.
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  */
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 struct ttm_tt {
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-	struct ttm_bo_device *bdev;
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-	struct ttm_backend_func *func;
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 	struct page **pages;
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 	uint32_t page_flags;
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 	unsigned long num_pages;
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 	struct sg_table *sg; /* for SG objects via dma-buf */
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 	struct file *swap_storage;
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 	enum ttm_caching_state caching_state;
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-	enum {
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-		tt_bound,
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-		tt_unbound,
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-		tt_unpopulated,
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-	} state;
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 };
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+
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+static inline bool ttm_tt_is_populated(struct ttm_tt *tt)
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+{
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+	return tt->page_flags & TTM_PAGE_FLAG_PRIV_POPULATED;
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+}
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+
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+static inline void ttm_tt_set_unpopulated(struct ttm_tt *tt)
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+{
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+	tt->page_flags &= ~TTM_PAGE_FLAG_PRIV_POPULATED;
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+}
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+
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+static inline void ttm_tt_set_populated(struct ttm_tt *tt)
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+{
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+	tt->page_flags |= TTM_PAGE_FLAG_PRIV_POPULATED;
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+}
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 /**
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  * struct ttm_dma_tt
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@@ -176,33 +147,20 @@
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 void ttm_dma_tt_fini(struct ttm_dma_tt *ttm_dma);
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 /**
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- * ttm_ttm_bind:
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- *
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- * @ttm: The struct ttm_tt containing backing pages.
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- * @bo_mem: The struct ttm_mem_reg identifying the binding location.
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- *
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- * Bind the pages of @ttm to an aperture location identified by @bo_mem
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- */
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-int ttm_tt_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem,
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-		struct ttm_operation_ctx *ctx);
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-
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-/**
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  * ttm_ttm_destroy:
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  *
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  * @ttm: The struct ttm_tt.
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  *
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  * Unbind, unpopulate and destroy common struct ttm_tt.
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  */
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-void ttm_tt_destroy(struct ttm_tt *ttm);
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+void ttm_tt_destroy(struct ttm_bo_device *bdev, struct ttm_tt *ttm);
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 /**
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- * ttm_ttm_unbind:
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+ * ttm_tt_destroy_common:
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  *
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- * @ttm: The struct ttm_tt.
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- *
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- * Unbind a struct ttm_tt.
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+ * Called from driver to destroy common path.
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  */
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-void ttm_tt_unbind(struct ttm_tt *ttm);
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+void ttm_tt_destroy_common(struct ttm_bo_device *bdev, struct ttm_tt *ttm);
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 /**
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  * ttm_tt_swapin:
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@@ -227,7 +185,7 @@
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  * and cache flushes and potential page splitting / combining.
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  */
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 int ttm_tt_set_placement_caching(struct ttm_tt *ttm, uint32_t placement);
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-int ttm_tt_swapout(struct ttm_tt *ttm, struct file *persistent_swap_storage);
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+int ttm_tt_swapout(struct ttm_bo_device *bdev, struct ttm_tt *ttm, struct file *persistent_swap_storage);
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 /**
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  * ttm_tt_populate - allocate pages for a ttm
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@@ -236,7 +194,7 @@
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  *
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  * Calls the driver method to allocate pages for a ttm
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  */
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-int ttm_tt_populate(struct ttm_tt *ttm, struct ttm_operation_ctx *ctx);
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+int ttm_tt_populate(struct ttm_bo_device *bdev, struct ttm_tt *ttm, struct ttm_operation_ctx *ctx);
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 /**
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  * ttm_tt_unpopulate - free pages from a ttm
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@@ -245,7 +203,7 @@
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  *
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  * Calls the driver method to free all pages from a ttm
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  */
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-void ttm_tt_unpopulate(struct ttm_tt *ttm);
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+void ttm_tt_unpopulate(struct ttm_bo_device *bdev, struct ttm_tt *ttm);
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 #if IS_ENABLED(CONFIG_AGP)
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 #include <linux/agp_backend.h>
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@@ -265,8 +223,10 @@
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 struct ttm_tt *ttm_agp_tt_create(struct ttm_buffer_object *bo,
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 				 struct agp_bridge_data *bridge,
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 				 uint32_t page_flags);
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-int ttm_agp_tt_populate(struct ttm_tt *ttm, struct ttm_operation_ctx *ctx);
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-void ttm_agp_tt_unpopulate(struct ttm_tt *ttm);
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+int ttm_agp_bind(struct ttm_tt *ttm, struct ttm_resource *bo_mem);
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+void ttm_agp_unbind(struct ttm_tt *ttm);
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+void ttm_agp_destroy(struct ttm_tt *ttm);
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+bool ttm_agp_is_bound(struct ttm_tt *ttm);
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 #endif
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 #endif