Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 428 insertions, 0 deletions

diff --git a/include/drm/ttm/ttm_resource.h b/include/drm/ttm/ttm_resource.h
new file mode 100644
index 0000000000..78a226eba9
--- /dev/null
+++ b/include/drm/ttm/ttm_resource.h
@@ -0,0 +1,428 @@
+/*
+ * Copyright 2020 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: Christian König
+ */
+
+#ifndef _TTM_RESOURCE_H_
+#define _TTM_RESOURCE_H_
+
+#include <linux/types.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
+#include <linux/iosys-map.h>
+#include <linux/dma-fence.h>
+
+#include <drm/drm_print.h>
+#include <drm/ttm/ttm_caching.h>
+#include <drm/ttm/ttm_kmap_iter.h>
+
+#define TTM_MAX_BO_PRIORITY	4U
+#define TTM_NUM_MEM_TYPES 8
+
+struct ttm_device;
+struct ttm_resource_manager;
+struct ttm_resource;
+struct ttm_place;
+struct ttm_buffer_object;
+struct ttm_placement;
+struct iosys_map;
+struct io_mapping;
+struct sg_table;
+struct scatterlist;
+
+struct ttm_resource_manager_func {
+	/**
+	 * struct ttm_resource_manager_func member alloc
+	 *
+	 * @man: Pointer to a memory type manager.
+	 * @bo: Pointer to the buffer object we're allocating space for.
+	 * @place: Placement details.
+	 * @res: Resulting pointer to the ttm_resource.
+	 *
+	 * This function should allocate space in the memory type managed
+	 * by @man. Placement details if applicable are given by @place. If
+	 * successful, a filled in ttm_resource object should be returned in
+	 * @res. @res::start should be set to a value identifying the beginning
+	 * of the range allocated, and the function should return zero.
+	 * If the manager can't fulfill the request -ENOSPC should be returned.
+	 * If a system error occurred, preventing the request to be fulfilled,
+	 * the function should return a negative error code.
+	 *
+	 * This function may not be called from within atomic context and needs
+	 * to take care of its own locking to protect any data structures
+	 * managing the space.
+	 */
+	int  (*alloc)(struct ttm_resource_manager *man,
+		      struct ttm_buffer_object *bo,
+		      const struct ttm_place *place,
+		      struct ttm_resource **res);
+
+	/**
+	 * struct ttm_resource_manager_func member free
+	 *
+	 * @man: Pointer to a memory type manager.
+	 * @res: Pointer to a struct ttm_resource to be freed.
+	 *
+	 * This function frees memory type resources previously allocated.
+	 * May not be called from within atomic context.
+	 */
+	void (*free)(struct ttm_resource_manager *man,
+		     struct ttm_resource *res);
+
+	/**
+	 * struct ttm_resource_manager_func member intersects
+	 *
+	 * @man: Pointer to a memory type manager.
+	 * @res: Pointer to a struct ttm_resource to be checked.
+	 * @place: Placement to check against.
+	 * @size: Size of the check.
+	 *
+	 * Test if @res intersects with @place + @size. Used to judge if
+	 * evictions are valueable or not.
+	 */
+	bool (*intersects)(struct ttm_resource_manager *man,
+			   struct ttm_resource *res,
+			   const struct ttm_place *place,
+			   size_t size);
+
+	/**
+	 * struct ttm_resource_manager_func member compatible
+	 *
+	 * @man: Pointer to a memory type manager.
+	 * @res: Pointer to a struct ttm_resource to be checked.
+	 * @place: Placement to check against.
+	 * @size: Size of the check.
+	 *
+	 * Test if @res compatible with @place + @size. Used to check of
+	 * the need to move the backing store or not.
+	 */
+	bool (*compatible)(struct ttm_resource_manager *man,
+			   struct ttm_resource *res,
+			   const struct ttm_place *place,
+			   size_t size);
+
+	/**
+	 * struct ttm_resource_manager_func member debug
+	 *
+	 * @man: Pointer to a memory type manager.
+	 * @printer: Prefix to be used in printout to identify the caller.
+	 *
+	 * This function is called to print out the state of the memory
+	 * type manager to aid debugging of out-of-memory conditions.
+	 * It may not be called from within atomic context.
+	 */
+	void (*debug)(struct ttm_resource_manager *man,
+		      struct drm_printer *printer);
+};
+
+/**
+ * struct ttm_resource_manager
+ *
+ * @use_type: The memory type is enabled.
+ * @use_tt: If a TT object should be used for the backing store.
+ * @size: Size of the managed region.
+ * @bdev: ttm device this manager belongs to
+ * @func: structure pointer implementing the range manager. See above
+ * @move_lock: lock for move fence
+ * @move: The fence of the last pipelined move operation.
+ * @lru: The lru list for this memory type.
+ *
+ * This structure is used to identify and manage memory types for a device.
+ */
+struct ttm_resource_manager {
+	/*
+	 * No protection. Constant from start.
+	 */
+	bool use_type;
+	bool use_tt;
+	struct ttm_device *bdev;
+	uint64_t size;
+	const struct ttm_resource_manager_func *func;
+	spinlock_t move_lock;
+
+	/*
+	 * Protected by @move_lock.
+	 */
+	struct dma_fence *move;
+
+	/*
+	 * Protected by the bdev->lru_lock.
+	 */
+	struct list_head lru[TTM_MAX_BO_PRIORITY];
+
+	/**
+	 * @usage: How much of the resources are used, protected by the
+	 * bdev->lru_lock.
+	 */
+	uint64_t usage;
+};
+
+/**
+ * struct ttm_bus_placement
+ *
+ * @addr:		mapped virtual address
+ * @offset:		physical addr
+ * @is_iomem:		is this io memory ?
+ * @caching:		See enum ttm_caching
+ *
+ * Structure indicating the bus placement of an object.
+ */
+struct ttm_bus_placement {
+	void			*addr;
+	phys_addr_t		offset;
+	bool			is_iomem;
+	enum ttm_caching	caching;
+};
+
+/**
+ * struct ttm_resource
+ *
+ * @start: Start of the allocation.
+ * @size: Actual size of resource in bytes.
+ * @mem_type: Resource type of the allocation.
+ * @placement: Placement flags.
+ * @bus: Placement on io bus accessible to the CPU
+ * @bo: weak reference to the BO, protected by ttm_device::lru_lock
+ *
+ * Structure indicating the placement and space resources used by a
+ * buffer object.
+ */
+struct ttm_resource {
+	unsigned long start;
+	size_t size;
+	uint32_t mem_type;
+	uint32_t placement;
+	struct ttm_bus_placement bus;
+	struct ttm_buffer_object *bo;
+
+	/**
+	 * @lru: Least recently used list, see &ttm_resource_manager.lru
+	 */
+	struct list_head lru;
+};
+
+/**
+ * struct ttm_resource_cursor
+ *
+ * @priority: the current priority
+ *
+ * Cursor to iterate over the resources in a manager.
+ */
+struct ttm_resource_cursor {
+	unsigned int priority;
+};
+
+/**
+ * struct ttm_lru_bulk_move_pos
+ *
+ * @first: first res in the bulk move range
+ * @last: last res in the bulk move range
+ *
+ * Range of resources for a lru bulk move.
+ */
+struct ttm_lru_bulk_move_pos {
+	struct ttm_resource *first;
+	struct ttm_resource *last;
+};
+
+/**
+ * struct ttm_lru_bulk_move
+ *
+ * @pos: first/last lru entry for resources in the each domain/priority
+ *
+ * Container for the current bulk move state. Should be used with
+ * ttm_lru_bulk_move_init() and ttm_bo_set_bulk_move().
+ */
+struct ttm_lru_bulk_move {
+	struct ttm_lru_bulk_move_pos pos[TTM_NUM_MEM_TYPES][TTM_MAX_BO_PRIORITY];
+};
+
+/**
+ * struct ttm_kmap_iter_iomap - Specialization for a struct io_mapping +
+ * struct sg_table backed struct ttm_resource.
+ * @base: Embedded struct ttm_kmap_iter providing the usage interface.
+ * @iomap: struct io_mapping representing the underlying linear io_memory.
+ * @st: sg_table into @iomap, representing the memory of the struct ttm_resource.
+ * @start: Offset that needs to be subtracted from @st to make
+ * sg_dma_address(st->sgl) - @start == 0 for @iomap start.
+ * @cache: Scatterlist traversal cache for fast lookups.
+ * @cache.sg: Pointer to the currently cached scatterlist segment.
+ * @cache.i: First index of @sg. PAGE_SIZE granularity.
+ * @cache.end: Last index + 1 of @sg. PAGE_SIZE granularity.
+ * @cache.offs: First offset into @iomap of @sg. PAGE_SIZE granularity.
+ */
+struct ttm_kmap_iter_iomap {
+	struct ttm_kmap_iter base;
+	struct io_mapping *iomap;
+	struct sg_table *st;
+	resource_size_t start;
+	struct {
+		struct scatterlist *sg;
+		pgoff_t i;
+		pgoff_t end;
+		pgoff_t offs;
+	} cache;
+};
+
+/**
+ * struct ttm_kmap_iter_linear_io - Iterator specialization for linear io
+ * @base: The base iterator
+ * @dmap: Points to the starting address of the region
+ * @needs_unmap: Whether we need to unmap on fini
+ */
+struct ttm_kmap_iter_linear_io {
+	struct ttm_kmap_iter base;
+	struct iosys_map dmap;
+	bool needs_unmap;
+};
+
+/**
+ * ttm_resource_manager_set_used
+ *
+ * @man: A memory manager object.
+ * @used: usage state to set.
+ *
+ * Set the manager in use flag. If disabled the manager is no longer
+ * used for object placement.
+ */
+static inline void
+ttm_resource_manager_set_used(struct ttm_resource_manager *man, bool used)
+{
+	int i;
+
+	for (i = 0; i < TTM_MAX_BO_PRIORITY; i++)
+		WARN_ON(!list_empty(&man->lru[i]));
+	man->use_type = used;
+}
+
+/**
+ * ttm_resource_manager_used
+ *
+ * @man: Manager to get used state for
+ *
+ * Get the in use flag for a manager.
+ * Returns:
+ * true is used, false if not.
+ */
+static inline bool ttm_resource_manager_used(struct ttm_resource_manager *man)
+{
+	return man->use_type;
+}
+
+/**
+ * ttm_resource_manager_cleanup
+ *
+ * @man: A memory manager object.
+ *
+ * Cleanup the move fences from the memory manager object.
+ */
+static inline void
+ttm_resource_manager_cleanup(struct ttm_resource_manager *man)
+{
+	dma_fence_put(man->move);
+	man->move = NULL;
+}
+
+void ttm_lru_bulk_move_init(struct ttm_lru_bulk_move *bulk);
+void ttm_lru_bulk_move_tail(struct ttm_lru_bulk_move *bulk);
+
+void ttm_resource_add_bulk_move(struct ttm_resource *res,
+				struct ttm_buffer_object *bo);
+void ttm_resource_del_bulk_move(struct ttm_resource *res,
+				struct ttm_buffer_object *bo);
+void ttm_resource_move_to_lru_tail(struct ttm_resource *res);
+
+void ttm_resource_init(struct ttm_buffer_object *bo,
+                       const struct ttm_place *place,
+                       struct ttm_resource *res);
+void ttm_resource_fini(struct ttm_resource_manager *man,
+		       struct ttm_resource *res);
+
+int ttm_resource_alloc(struct ttm_buffer_object *bo,
+		       const struct ttm_place *place,
+		       struct ttm_resource **res);
+void ttm_resource_free(struct ttm_buffer_object *bo, struct ttm_resource **res);
+bool ttm_resource_intersects(struct ttm_device *bdev,
+			     struct ttm_resource *res,
+			     const struct ttm_place *place,
+			     size_t size);
+bool ttm_resource_compatible(struct ttm_device *bdev,
+			     struct ttm_resource *res,
+			     const struct ttm_place *place,
+			     size_t size);
+bool ttm_resource_compat(struct ttm_resource *res,
+			 struct ttm_placement *placement);
+void ttm_resource_set_bo(struct ttm_resource *res,
+			 struct ttm_buffer_object *bo);
+
+void ttm_resource_manager_init(struct ttm_resource_manager *man,
+			       struct ttm_device *bdev,
+			       uint64_t size);
+
+int ttm_resource_manager_evict_all(struct ttm_device *bdev,
+				   struct ttm_resource_manager *man);
+
+uint64_t ttm_resource_manager_usage(struct ttm_resource_manager *man);
+void ttm_resource_manager_debug(struct ttm_resource_manager *man,
+				struct drm_printer *p);
+
+struct ttm_resource *
+ttm_resource_manager_first(struct ttm_resource_manager *man,
+			   struct ttm_resource_cursor *cursor);
+struct ttm_resource *
+ttm_resource_manager_next(struct ttm_resource_manager *man,
+			  struct ttm_resource_cursor *cursor,
+			  struct ttm_resource *res);
+
+/**
+ * ttm_resource_manager_for_each_res - iterate over all resources
+ * @man: the resource manager
+ * @cursor: struct ttm_resource_cursor for the current position
+ * @res: the current resource
+ *
+ * Iterate over all the evictable resources in a resource manager.
+ */
+#define ttm_resource_manager_for_each_res(man, cursor, res)		\
+	for (res = ttm_resource_manager_first(man, cursor); res;	\
+	     res = ttm_resource_manager_next(man, cursor, res))
+
+struct ttm_kmap_iter *
+ttm_kmap_iter_iomap_init(struct ttm_kmap_iter_iomap *iter_io,
+			 struct io_mapping *iomap,
+			 struct sg_table *st,
+			 resource_size_t start);
+
+struct ttm_kmap_iter_linear_io;
+
+struct ttm_kmap_iter *
+ttm_kmap_iter_linear_io_init(struct ttm_kmap_iter_linear_io *iter_io,
+			     struct ttm_device *bdev,
+			     struct ttm_resource *mem);
+
+void ttm_kmap_iter_linear_io_fini(struct ttm_kmap_iter_linear_io *iter_io,
+				  struct ttm_device *bdev,
+				  struct ttm_resource *mem);
+
+void ttm_resource_manager_create_debugfs(struct ttm_resource_manager *man,
+					 struct dentry * parent,
+					 const char *name);
+#endif