WebSVN – Kolibri OS – Diff – /drivers/include/drm/ttm/ttm_bo_driver.h

  * Authors: Thomas Hellstrom
  */
 #ifndef _TTM_BO_DRIVER_H_
 #define _TTM_BO_DRIVER_H_
-#include "ttm/ttm_bo_api.h"
+#include
-#include "ttm/ttm_memory.h"
+#include
-#include "ttm/ttm_module.h"
+#include
+#include
-#include "drm_mm.h"
+#include
-#include "linux/spinlock.h"
+//#include
+//#include
-struct ttm_backend;
+#include
-struct ttm_backend_func {
-	/**
-	 * struct ttm_backend_func member populate
-	 *
-	 * @backend: Pointer to a struct ttm_backend.
-	 * @num_pages: Number of pages to populate.
-	 * @pages: Array of pointers to ttm pages.
-	 * @dummy_read_page: Page to be used instead of NULL pages in the
-	 * array @pages.
-	 *
-	 * Populate the backend with ttm pages. Depending on the backend,
-	 * it may or may not copy the @pages array.
-	 */
-	int (*populate) (struct ttm_backend *backend,
-			 unsigned long num_pages, struct page **pages,
-			 struct page *dummy_read_page,
-			 dma_addr_t *dma_addrs);
-	/**
-	 * struct ttm_backend_func member clear
-	 *
-	 * @backend: Pointer to a struct ttm_backend.
-	 *
-	 * This is an "unpopulate" function. Release all resources
-	 * allocated with populate.
-	 */
-	void (*clear) (struct ttm_backend *backend);
 struct ttm_backend_func {
 	/**
 	 * struct ttm_backend_func member bind
+	 *
-	 * @backend: Pointer to a struct ttm_backend.
+	 * @ttm: Pointer to a struct ttm_tt.
 	 * @bo_mem: Pointer to a struct ttm_mem_reg describing the
 	 * memory type and location for binding.
+	 *
 	 * Bind the backend pages into the aperture in the location
 	 * indicated by @bo_mem. This function should be able to handle
-	 * differences between aperture- and system page sizes.
+	 * differences between aperture and system page sizes.
 	 */
-	int (*bind) (struct ttm_backend *backend, struct ttm_mem_reg *bo_mem);
+	int (*bind) (struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem);
 	/**
 	 * struct ttm_backend_func member unbind
+	 *
-	 * @backend: Pointer to a struct ttm_backend.
+	 * @ttm: Pointer to a struct ttm_tt.
+	 *
 	 * Unbind previously bound backend pages. This function should be
-	 * able to handle differences between aperture- and system page sizes.
+	 * able to handle differences between aperture and system page sizes.
 	 */
-	int (*unbind) (struct ttm_backend *backend);
+	int (*unbind) (struct ttm_tt *ttm);
 	/**
 	 * struct ttm_backend_func member destroy
+	 *
 	 * @ttm: Pointer to a struct ttm_tt.
-	 * @backend: Pointer to a struct ttm_backend.
+	 *
-	 *
-	 * Destroy the backend.
-	 */
-	void (*destroy) (struct ttm_backend *backend);
-};
-/**
- * struct ttm_backend
- *
- * @bdev: Pointer to a struct ttm_bo_device.
- * @flags: For driver use.
- * @func: Pointer to a struct ttm_backend_func that describes
- * the backend methods.
- *
- */
-struct ttm_backend {
+	 * Destroy the backend. This will be call back from ttm_tt_destroy so
-	struct ttm_bo_device *bdev;
-	uint32_t flags;
-	struct ttm_backend_func *func;
+	 * don't call ttm_tt_destroy from the callback or infinite loop.
-};
+	 */
 	void (*destroy) (struct ttm_tt *ttm);
-#define TTM_PAGE_FLAG_USER            (1 << 1)
+};
 #define TTM_PAGE_FLAG_USER_DIRTY      (1 << 2)
+#define TTM_PAGE_FLAG_WRITE           (1 << 3)
-#define TTM_PAGE_FLAG_WRITE           (1 << 3)
+#define TTM_PAGE_FLAG_SWAPPED         (1 << 4)
-#define TTM_PAGE_FLAG_SWAPPED         (1 << 4)
+#define TTM_PAGE_FLAG_PERSISTENT_SWAP (1 << 5)
-#define TTM_PAGE_FLAG_PERSISTENT_SWAP (1 << 5)
+#define TTM_PAGE_FLAG_ZERO_ALLOC      (1 << 6)
-#define TTM_PAGE_FLAG_ZERO_ALLOC      (1 << 6)
+#define TTM_PAGE_FLAG_DMA32           (1 << 7)
-#define TTM_PAGE_FLAG_DMA32           (1 << 7)
+#define TTM_PAGE_FLAG_SG              (1 << 8)
 enum ttm_caching_state {
 	tt_uncached,
+	tt_wc,
+	tt_cached
+};
 	tt_wc,
-	tt_cached
+/**
-};
+ * struct ttm_tt
-/**
- * struct ttm_tt
- *
- * @dummy_read_page: Page to map where the ttm_tt page array contains a NULL
  * pointer.
- * @pages: Array of pages backing the data.
+ * @bdev: Pointer to a struct ttm_bo_device.
- * @first_himem_page: Himem pages are put last in the page array, which
+ * @func: Pointer to a struct ttm_backend_func that describes
- * enables us to run caching attribute changes on only the first part
- * of the page array containing lomem pages. This is the index of the
- * first himem page.
+ * the backend methods.
- * @last_lomem_page: Index of the last lomem page in the page array.
+ * @dummy_read_page: Page to map where the ttm_tt page array contains a NULL
- * @num_pages: Number of pages in the page array.
+ * pointer.
- * @bdev: Pointer to the current struct ttm_bo_device.
- * @be: Pointer to the ttm backend.
+ * @pages: Array of pages backing the data.
- * @tsk: The task for user ttm.
+ * @num_pages: Number of pages in the page array.
- * @start: virtual address for user ttm.
+ * @bdev: Pointer to the current struct ttm_bo_device.
- * @swap_storage: Pointer to shmem struct file for swap storage.
+ * @be: Pointer to the ttm backend.
- * @caching_state: The current caching state of the pages.
+ * @swap_storage: Pointer to shmem struct file for swap storage.
- * @state: The current binding state of the pages.
+ * @caching_state: The current caching state of the pages.
+ * @state: The current binding state of the pages.
+ *
- * @dma_address: The DMA (bus) addresses of the pages (if TTM_PAGE_FLAG_DMA32)
+ * This is a structure holding the pages, caching- and aperture binding
  * status for a buffer object that isn't backed by fixed (VRAM / AGP)
- * This is a structure holding the pages, caching- and aperture binding
- * status for a buffer object that isn't backed by fixed (VRAM / AGP)
  * memory.
  */
 struct ttm_tt {
-struct ttm_tt {
-	struct page *dummy_read_page;
-	struct page **pages;
-	long first_himem_page;
+	struct ttm_bo_device *bdev;
-	long last_lomem_page;
+	struct ttm_backend_func *func;
-	uint32_t page_flags;
+	struct page *dummy_read_page;
-	unsigned long num_pages;
+	struct page **pages;
-	struct ttm_bo_global *glob;
+	uint32_t page_flags;
-	struct ttm_backend *be;
+	unsigned long num_pages;
-	struct task_struct *tsk;
+	struct sg_table *sg; /* for SG objects via dma-buf */
+	struct ttm_bo_global *glob;
+	struct file *swap_storage;
+	enum ttm_caching_state caching_state;
+	enum {
+		tt_bound,
+		tt_unbound,
+		tt_unpopulated,
+	} state;
+};
+/**
+ * struct ttm_dma_tt
+ *
+ * @ttm: Base ttm_tt struct.
+ * @dma_address: The DMA (bus) addresses of the pages
-	unsigned long start;
+ * @pages_list: used by some page allocation backend
+ *
-	struct file *swap_storage;
+ * This is a structure holding the pages, caching- and aperture binding
-	enum ttm_caching_state caching_state;
+ * status for a buffer object that isn't backed by fixed (VRAM / AGP)
-	enum {
+ * memory.
-		tt_bound,
+ */
+struct ttm_dma_tt {
+	struct ttm_tt ttm;
+	dma_addr_t *dma_address;
+	struct list_head pages_list;
+};
+#define TTM_MEMTYPE_FLAG_FIXED         (1 << 0)	/* Fixed (on-card) PCI memory */
+#define TTM_MEMTYPE_FLAG_MAPPABLE      (1 << 1)	/* Memory mappable */
+#define TTM_MEMTYPE_FLAG_CMA           (1 << 3)	/* Can't map aperture */
+struct ttm_mem_type_manager;
+struct ttm_mem_type_manager_func {
+	/**
+	 * struct ttm_mem_type_manager member init
+	 *
+	 * @man: Pointer to a memory type manager.
+	 * @p_size: Implementation dependent, but typically the size of the
+	 * range to be managed in pages.
+	 *
+	 * Called to initialize a private range manager. The function is
+	 * expected to initialize the man::priv member.
+	 * Returns 0 on success, negative error code on failure.
+	 */
+	int  (*init)(struct ttm_mem_type_manager *man, unsigned long p_size);
+	/**
+	 * struct ttm_mem_type_manager member takedown
+	 *
+	 * @man: Pointer to a memory type manager.
+	 *
+	 * Called to undo the setup done in init. All allocated resources
+	 * should be freed.
+	 */
+	int  (*takedown)(struct ttm_mem_type_manager *man);
+	/**
+	 * struct ttm_mem_type_manager member get_node
+	 *
+	 * @man: Pointer to a memory type manager.
+	 * @bo: Pointer to the buffer object we're allocating space for.
+	 * @placement: Placement details.
+	 * @mem: Pointer to a struct ttm_mem_reg to be filled in.
+	 *
+	 * This function should allocate space in the memory type managed
+	 * by @man. Placement details if
+	 * applicable are given by @placement. If successful,
+	 * @mem::mm_node should be set to a non-null value, and
+	 * @mem::start should be set to a value identifying the beginning
+	 * of the range allocated, and the function should return zero.
+	 * If the memory region accommodate the buffer object, @mem::mm_node
+	 * should be set to NULL, and the function should return 0.
+	 * If a system error occurred, preventing the request to be fulfilled,
+	 * the function should return a negative error code.
+	 *
+	 * Note that @mem::mm_node will only be dereferenced by
+	 * struct ttm_mem_type_manager functions and optionally by the driver,
+	 * which has knowledge of the underlying type.
+	 *
+	 * This function may not be called from within atomic context, so
+	 * an implementation can and must use either a mutex or a spinlock to
+	 * protect any data structures managing the space.
+	 */
+	int  (*get_node)(struct ttm_mem_type_manager *man,
+			 struct ttm_buffer_object *bo,
+			 struct ttm_placement *placement,
+			 struct ttm_mem_reg *mem);
+	/**
+	 * struct ttm_mem_type_manager member put_node
+	 *
+	 * @man: Pointer to a memory type manager.
+	 * @mem: Pointer to a struct ttm_mem_reg to be filled in.
+	 *
+	 * This function frees memory type resources previously allocated
+	 * and that are identified by @mem::mm_node and @mem::start. May not
+	 * be called from within atomic context.
+	 */
+	void (*put_node)(struct ttm_mem_type_manager *man,
+			 struct ttm_mem_reg *mem);
+	/**
+	 * struct ttm_mem_type_manager member debug
+	 *
-		tt_unbound,
+	 * @man: Pointer to a memory type manager.
-		tt_unpopulated,
+	 * @prefix: Prefix to be used in printout to identify the caller.
 	} state;
-	dma_addr_t *dma_address;
+	 * This function is called to print out the state of the memory
-};
+	 * type manager to aid debugging of out-of-memory conditions.
  * @sync_obj_ref: See ttm_fence_api.h
  */
 struct ttm_bo_driver {
 	/**
-	 * struct ttm_bo_driver member create_ttm_backend_entry
+	 * ttm_tt_create
 	 *
+	 * @bdev: pointer to a struct ttm_bo_device:
+	 * @size: Size of the data needed backing.
+	 * @page_flags: Page flags as identified by TTM_PAGE_FLAG_XX flags.
-	 * @bdev: The buffer object device.
+	 * @dummy_read_page: See struct ttm_bo_device.
 	 *
+	 * Create a struct ttm_tt to back data with system memory pages.
+	 * No pages are actually allocated.
+	 * Returns:
-	 * Create a driver specific struct ttm_backend.
+	 * NULL: Out of memory.
+	 */
+	struct ttm_tt *(*ttm_tt_create)(struct ttm_bo_device *bdev,
+					unsigned long size,
+					uint32_t page_flags,
+					struct page *dummy_read_page);
+	/**
-	 */
+	 * ttm_tt_populate
+	 *
+	 * @ttm: The struct ttm_tt to contain the backing pages.
+	 *
+	 * Allocate all backing pages
+	 * Returns:
+	 * -ENOMEM: Out of memory.
+	 */
+	int (*ttm_tt_populate)(struct ttm_tt *ttm);
+	/**
+	 * ttm_tt_unpopulate
+	 *
+	 * @ttm: The struct ttm_tt to contain the backing pages.
+	 *
+	 * Free all backing page
-	struct ttm_backend *(*create_ttm_backend_entry)
+	 */
-	 (struct ttm_bo_device *bdev);
+	void (*ttm_tt_unpopulate)(struct ttm_tt *ttm);
 	/**
+	 *
 	 * Move a buffer between two memory regions.
 	 */
 	int (*move) (struct ttm_buffer_object *bo,
 		     bool evict, bool interruptible,
+		     bool no_wait_gpu,
-		     bool no_wait, struct ttm_mem_reg *new_mem);
+		     struct ttm_mem_reg *new_mem);
 	/**
 	 * struct ttm_bo_driver_member verify_access
+	 *
 	 * fences directly. The bo driver needs the following functionality:
 	 * See the corresponding functions in the fence object API
 	 * documentation.
 	 */
-	bool (*sync_obj_signaled) (void *sync_obj, void *sync_arg);
+	bool (*sync_obj_signaled) (void *sync_obj);
-	int (*sync_obj_wait) (void *sync_obj, void *sync_arg,
+	int (*sync_obj_wait) (void *sync_obj,
 			      bool lazy, bool interruptible);
-	int (*sync_obj_flush) (void *sync_obj, void *sync_arg);
+	int (*sync_obj_flush) (void *sync_obj);
 	void (*sync_obj_unref) (void **sync_obj);
 	void *(*sync_obj_ref) (void *sync_obj);
 	/* hook to notify driver about a driver move so it
 	 * can do tiling things */
 	void (*move_notify)(struct ttm_buffer_object *bo,
 			    struct ttm_mem_reg *new_mem);
 	/* notify the driver we are taking a fault on this BO
+	 * and have reserved it */
+	int (*fault_reserve_notify)(struct ttm_buffer_object *bo);
+	/**
+	 * notify the driver that we're about to swap out this bo
+	 */
+	void (*swap_notify) (struct ttm_buffer_object *bo);
+	/**
+	 * Driver callback on when mapping io memory (for bo_move_memcpy
+	 * for instance). TTM will take care to call io_mem_free whenever
+	 * the mapping is not use anymore. io_mem_reserve & io_mem_free
+	 * are balanced.
+	 */
-	 * and have reserved it */
+	int (*io_mem_reserve)(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem);
-	void (*fault_reserve_notify)(struct ttm_buffer_object *bo);
+	void (*io_mem_free)(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem);
 };
 /**
  * struct ttm_bo_global_ref - Argument to initialize a struct ttm_bo_global.
  */
 struct ttm_bo_global_ref {
-	struct ttm_global_reference ref;
+    struct drm_global_reference ref;
 	struct ttm_mem_global *mem_glob;
 };
 /**
  * struct ttm_bo_global - Buffer object driver global data.
- *
- * @mem_glob: Pointer to a struct ttm_mem_global object for accounting.
- * @dummy_read_page: Pointer to a dummy page used for mapping requests
  * of unpopulated pages.
- * @shrink: A shrink callback object used for buffer object swap.
+ * @mem_glob: Pointer to a struct ttm_mem_global object for accounting.
- * @ttm_bo_extra_size: Extra size (sizeof(struct ttm_buffer_object) excluded)
+ * @dummy_read_page: Pointer to a dummy page used for mapping requests
- * used by a buffer object. This is excluding page arrays and backing pages.
+ * of unpopulated pages.
- * @ttm_bo_size: This is @ttm_bo_extra_size + sizeof(struct ttm_buffer_object).
+ * @shrink: A shrink callback object used for buffer object swap.
-//	struct kobject kobj;
+//   struct kobject kobj;
 	struct ttm_mem_global *mem_glob;
 	struct page *dummy_read_page;
-	struct ttm_mem_shrink shrink;
-	size_t ttm_bo_extra_size;
-	size_t ttm_bo_size;
+	struct ttm_mem_shrink shrink;
 	struct mutex device_list_mutex;
 	spinlock_t lru_lock;
 /**
  * struct ttm_bo_device - Buffer object driver device-specific data.
+ *
  * @driver: Pointer to a struct ttm_bo_driver struct setup by the driver.
  * @man: An array of mem_type_managers.
+ * @fence_lock: Protects the synchronizing members on *all* bos belonging
+ * to this device.
  * @addr_space_mm: Range manager for the device address space.
  * lru_lock: Spinlock that protects the buffer+device lru lists and
  * ddestroy lists.
- * @nice_mode: Try nicely to wait for buffer idle when cleaning a manager.
- * If a GPU lockup has been detected, this is forced to 0.
+ * @val_seq: Current validation sequence.
  * @dev_mapping: A pointer to the struct address_space representing the
  * device address space.
  * @wq: Work queue structure for the delayed delete workqueue.
+ *
  */
 	struct list_head device_list;
 	struct ttm_bo_global *glob;
 	struct ttm_bo_driver *driver;
-    rwlock_t vm_lock;
+	rwlock_t vm_lock;
 	struct ttm_mem_type_manager man[TTM_NUM_MEM_TYPES];
+	spinlock_t fence_lock;
 	/*
 	 * Protected by the vm lock.
 	 */
-//   struct rb_root addr_space_rb;
+	struct rb_root addr_space_rb;
 	struct drm_mm addr_space_mm;
 	/*
 	 * Protected by the global:lru lock.
 	 */
+	struct list_head ddestroy;
-	struct list_head ddestroy;
+	uint32_t val_seq;
 	/*
-	 * Protected by load / firstopen / lastclose /unload sync.
-	 */
+	 * Protected by load / firstopen / lastclose /unload sync.
 	 */
 	bool nice_mode;
-    struct address_space *dev_mapping;
+	struct address_space *dev_mapping;
 	/*
 	 * Internal protection.
 	 */
 	*old ^= (*old ^ new) & mask;
 	return *old;
+}
 /**
- * ttm_tt_create
+ * ttm_tt_init
+ *
  * @ttm: The struct ttm_tt.
  * @bdev: pointer to a struct ttm_bo_device:
  * @size: Size of the data needed backing.
  * @page_flags: Page flags as identified by TTM_PAGE_FLAG_XX flags.
  * @dummy_read_page: See struct ttm_bo_device.
+ *
  * Create a struct ttm_tt to back data with system memory pages.
  * No pages are actually allocated.
  * Returns:
  * NULL: Out of memory.
  */
-extern struct ttm_tt *ttm_tt_create(struct ttm_bo_device *bdev,
+extern int ttm_tt_init(struct ttm_tt *ttm, struct ttm_bo_device *bdev,
+			unsigned long size, uint32_t page_flags,
+			struct page *dummy_read_page);
-				    unsigned long size,
+extern int ttm_dma_tt_init(struct ttm_dma_tt *ttm_dma, struct ttm_bo_device *bdev,
-				    uint32_t page_flags,
+			   unsigned long size, uint32_t page_flags,
-				    struct page *dummy_read_page);
+			   struct page *dummy_read_page);
 /**
- * ttm_tt_set_user:
+ * ttm_tt_fini
- *
- * @ttm: The struct ttm_tt to populate.
- * @tsk: A struct task_struct for which @start is a valid user-space address.
  * @start: A valid user-space address.
- * @num_pages: Size in pages of the user memory area.
- *
+ * @ttm: the ttm_tt structure.
- * Populate a struct ttm_tt with a user-space memory area after first pinning
- * the pages backing it.
  * Returns:
- * !0: Error.
- */
+ * Free memory of ttm_tt structure
-extern int ttm_tt_set_user(struct ttm_tt *ttm,
+ */
-			   struct task_struct *tsk,
+extern void ttm_tt_fini(struct ttm_tt *ttm);
-			   unsigned long start, unsigned long num_pages);
+extern void ttm_dma_tt_fini(struct ttm_dma_tt *ttm_dma);
 /**
  * Bind the pages of @ttm to an aperture location identified by @bo_mem
  */
 extern int ttm_tt_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem);
-/**
- * ttm_tt_populate:
- *
- * @ttm: The struct ttm_tt to contain the backing pages.
- *
- * Add backing pages to all of @ttm
- */
-extern int ttm_tt_populate(struct ttm_tt *ttm);
 /**
  * ttm_ttm_destroy:
+ *
  * @ttm: The struct ttm_tt.
  *
- * Unbind, unpopulate and destroy a struct ttm_tt.
+ * Unbind, unpopulate and destroy common struct ttm_tt.
  */
 extern void ttm_tt_destroy(struct ttm_tt *ttm);
  * Unbind a struct ttm_tt.
  */
 extern void ttm_tt_unbind(struct ttm_tt *ttm);
 /**
- * ttm_ttm_destroy:
+ * ttm_tt_swapin:
+ *
- * @ttm: The struct ttm_tt.
- * @index: Index of the desired page.
- *
- * Return a pointer to the struct page backing @ttm at page
- * index @index. If the page is unpopulated, one will be allocated to
- * populate that index.
+ * @ttm: The struct ttm_tt.
- *
- * Returns:
+ *
- * NULL on OOM.
+ * Swap in a previously swap out ttm_tt.
  */
-extern struct page *ttm_tt_get_page(struct ttm_tt *ttm, int index);
+extern int ttm_tt_swapin(struct ttm_tt *ttm);
 /**
  * ttm_tt_cache_flush:
  * hit RAM. This function may be very costly as it involves global TLB
  * and cache flushes and potential page splitting / combining.
  */
 extern int ttm_tt_set_placement_caching(struct ttm_tt *ttm, uint32_t placement);
 extern int ttm_tt_swapout(struct ttm_tt *ttm,
-			  struct file *persistant_swap_storage);
+			  struct file *persistent_swap_storage);
 /*
  * ttm_bo.c
  * @bo: Pointer to a struct ttm_buffer_object. the data of which
  * we want to allocate space for.
  * @proposed_placement: Proposed new placement for the buffer object.
  * @mem: A struct ttm_mem_reg.
  * @interruptible: Sleep interruptible when sliping.
- * @no_wait: Don't sleep waiting for space to become available.
+ * @no_wait_gpu: Return immediately if the GPU is busy.
+ *
  * Allocate memory space for the buffer object pointed to by @bo, using
  * the placement flags in @mem, potentially evicting other idle buffer objects.
  * This function may sleep while waiting for space to become available.
  * Returns:
  * -ERESTARTSYS: An interruptible sleep was interrupted by a signal.
  */
 extern int ttm_bo_mem_space(struct ttm_buffer_object *bo,
 				struct ttm_placement *placement,
 				struct ttm_mem_reg *mem,
-				bool interruptible, bool no_wait);
+				bool interruptible,
-/**
- * ttm_bo_wait_for_cpu
+				bool no_wait_gpu);
- *
- * @bo: Pointer to a struct ttm_buffer_object.
- * @no_wait: Don't sleep while waiting.
- *
- * Wait until a buffer object is no longer sync'ed for CPU access.
- * Returns:
- * -EBUSY: Buffer object was sync'ed for CPU access. (only if no_wait == 1).
- * -ERESTARTSYS: An interruptible sleep was interrupted by a signal.
- */
-extern int ttm_bo_wait_cpu(struct ttm_buffer_object *bo, bool no_wait);
-/**
- * ttm_bo_pci_offset - Get the PCI offset for the buffer object memory.
- *
- * @bo Pointer to a struct ttm_buffer_object.
- * @bus_base On return the base of the PCI region
- * @bus_offset On return the byte offset into the PCI region
- * @bus_size On return the byte size of the buffer object or zero if
- * the buffer object memory is not accessible through a PCI region.
- *
- * Returns:
- * -EINVAL if the buffer object is currently not mappable.
- * 0 otherwise.
- */
-extern int ttm_bo_pci_offset(struct ttm_bo_device *bdev,
+extern void ttm_bo_mem_put(struct ttm_buffer_object *bo,
-			     struct ttm_mem_reg *mem,
-			     unsigned long *bus_base,
+			   struct ttm_mem_reg *mem);
-			     unsigned long *bus_offset,
+extern void ttm_bo_mem_put_locked(struct ttm_buffer_object *bo,
-			     unsigned long *bus_size);
+				  struct ttm_mem_reg *mem);
-extern void ttm_bo_global_release(struct ttm_global_reference *ref);
+extern void ttm_bo_global_release(struct drm_global_reference *ref);
-extern int ttm_bo_global_init(struct ttm_global_reference *ref);
+extern int ttm_bo_global_init(struct drm_global_reference *ref);
 extern int ttm_bo_device_release(struct ttm_bo_device *bdev);
 /**
  * ttm_bo_device_init
+ *
  * @bdev: A pointer to a struct ttm_bo_device to initialize.
- * @mem_global: A pointer to an initialized struct ttm_mem_global.
+ * @glob: A pointer to an initialized struct ttm_bo_global.
  * @driver: A pointer to a struct ttm_bo_driver set up by the caller.
  * @bo: tear down the virtual mappings for this BO
  */
 extern void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo);
+/**
+ * ttm_bo_unmap_virtual
+ *
+ * @bo: tear down the virtual mappings for this BO
+ *
+ * The caller must take ttm_mem_io_lock before calling this function.
+ */
+extern void ttm_bo_unmap_virtual_locked(struct ttm_buffer_object *bo);
+extern int ttm_mem_io_reserve_vm(struct ttm_buffer_object *bo);
+extern void ttm_mem_io_free_vm(struct ttm_buffer_object *bo);
+extern int ttm_mem_io_lock(struct ttm_mem_type_manager *man,
+			   bool interruptible);
+extern void ttm_mem_io_unlock(struct ttm_mem_type_manager *man);
 /**
  * ttm_bo_reserve:
+ *
  * @bo: A pointer to a struct ttm_buffer_object.
  * @interruptible: Sleep interruptible if waiting.
+ *
  * Deadlocks may occur when two processes try to reserve multiple buffers in
  * different order, either by will or as a result of a buffer being evicted
  * to make room for a buffer already reserved. (Buffers are reserved before
  * they are evicted). The following algorithm prevents such deadlocks from
- * occuring:
+ * occurring:
  * 1) Buffers are reserved with the lru spinlock held. Upon successful
  * reservation they are removed from the lru list. This stops a reserved buffer
  * from being evicted. However the lru spinlock is released between the time
  * a buffer is selected for eviction and the time it is reserved.
  * Therefore a check is made when a buffer is reserved for eviction, that it
  * -EAGAIN: The reservation may cause a deadlock.
  * Release all buffer reservations, wait for @bo to become unreserved and
  * try again. (only if use_sequence == 1).
  * -ERESTARTSYS: A wait for the buffer to become unreserved was interrupted by
  * a signal. Release all buffer reservations and return to user-space.
+ * -EBUSY: The function needed to sleep, but @no_wait was true
+ * -EDEADLK: Bo already reserved using @sequence. This error code will only
+ * be returned if @use_sequence is set to true.
  */
 extern int ttm_bo_reserve(struct ttm_buffer_object *bo,
 			  bool interruptible,
 			  bool no_wait, bool use_sequence, uint32_t sequence);
 /**
- * ttm_bo_unreserve
+ * ttm_bo_reserve_locked:
+ *
+ * @bo: A pointer to a struct ttm_buffer_object.
+ * @interruptible: Sleep interruptible if waiting.
+ * @no_wait: Don't sleep while trying to reserve, rather return -EBUSY.
+ * @use_sequence: If @bo is already reserved, Only sleep waiting for
- * @bo: A pointer to a struct ttm_buffer_object.
+ * it to become unreserved if @sequence < (@bo)->sequence.
+ *
+ * Must be called with struct ttm_bo_global::lru_lock held,
+ * and will not remove reserved buffers from the lru lists.
+ * The function may release the LRU spinlock if it needs to sleep.
+ * Otherwise identical to ttm_bo_reserve.
+ *
+ * Returns:
+ * -EAGAIN: The reservation may cause a deadlock.
+ * Release all buffer reservations, wait for @bo to become unreserved and
+ * try again. (only if use_sequence == 1).
+ * -ERESTARTSYS: A wait for the buffer to become unreserved was interrupted by
+ * a signal. Release all buffer reservations and return to user-space.
+ * -EBUSY: The function needed to sleep, but @no_wait was true
- *
+ * -EDEADLK: Bo already reserved using @sequence. This error code will only
- * Unreserve a previous reservation of @bo.
+ * be returned if @use_sequence is set to true.
  */
+extern int ttm_bo_reserve_locked(struct ttm_buffer_object *bo,
+				 bool interruptible,
+				 bool no_wait, bool use_sequence,
-extern void ttm_bo_unreserve(struct ttm_buffer_object *bo);
+				 uint32_t sequence);
 /**
- * ttm_bo_wait_unreserved
+ * ttm_bo_unreserve
+ *
- * @bo: A pointer to a struct ttm_buffer_object.
- *
- * Wait for a struct ttm_buffer_object to become unreserved.
+ * @bo: A pointer to a struct ttm_buffer_object.
  * This is typically used in the execbuf code to relax cpu-usage when
- * a potential deadlock condition backoff.
+ * Unreserve a previous reservation of @bo.
- */
-extern int ttm_bo_wait_unreserved(struct ttm_buffer_object *bo,
+ */
-				  bool interruptible);
+extern void ttm_bo_unreserve(struct ttm_buffer_object *bo);
 /**
- * ttm_bo_block_reservation
- *
- * @bo: A pointer to a struct ttm_buffer_object.
- * @interruptible: Use interruptible sleep when waiting.
- * @no_wait: Don't sleep, but rather return -EBUSY.
- *
- * Block reservation for validation by simply reserving the buffer.
+ * ttm_bo_unreserve_locked
- * This is intended for single buffer use only without eviction,
- * and thus needs no deadlock protection.
+ *
- *
+ * @bo: A pointer to a struct ttm_buffer_object.
- * Returns:
  * -EBUSY: If no_wait == 1 and the buffer is already reserved.
- * -ERESTARTSYS: If interruptible == 1 and the process received a signal
+ * Unreserve a previous reservation of @bo.
- * while sleeping.
- */
+ * Needs to be called with struct ttm_bo_global::lru_lock held.
-extern int ttm_bo_block_reservation(struct ttm_buffer_object *bo,
+ */
-				    bool interruptible, bool no_wait);
+extern void ttm_bo_unreserve_locked(struct ttm_buffer_object *bo);
 /**
+ * ttm_bo_wait_unreserved
+ *
- * ttm_bo_unblock_reservation
+ * @bo: A pointer to a struct ttm_buffer_object.
+ *
- * @bo: A pointer to a struct ttm_buffer_object.
+ * Wait for a struct ttm_buffer_object to become unreserved.
+ * This is typically used in the execbuf code to relax cpu-usage when
  * a potential deadlock condition backoff.
- * Unblocks reservation leaving lru lists untouched.
+ */
- */
+extern int ttm_bo_wait_unreserved(struct ttm_buffer_object *bo,
-extern void ttm_bo_unblock_reservation(struct ttm_buffer_object *bo);
+				  bool interruptible);
 /*
  * ttm_bo_util.c
  */
 /**
  * ttm_bo_move_ttm
+ *
  * @bo: A pointer to a struct ttm_buffer_object.
  * @evict: 1: This is an eviction. Don't try to pipeline.
  * Returns:
  * !0: Failure.
  */
 extern int ttm_bo_move_ttm(struct ttm_buffer_object *bo,
-			   bool evict, bool no_wait,
+			   bool evict, bool no_wait_gpu,
 			   struct ttm_mem_reg *new_mem);
 /**
  * ttm_bo_move_memcpy
+ *
  * @bo: A pointer to a struct ttm_buffer_object.
  * @evict: 1: This is an eviction. Don't try to pipeline.
- * @no_wait: Never sleep, but rather return with -EBUSY.
+ * @no_wait_gpu: Return immediately if the GPU is busy.
  * @new_mem: struct ttm_mem_reg indicating where to move.
+ *
  * Fallback move function for a mappable buffer object in mappable memory.
  * Returns:
  * !0: Failure.
  */
 extern int ttm_bo_move_memcpy(struct ttm_buffer_object *bo,
-			      bool evict,
+			      bool evict, bool no_wait_gpu,
-			      bool no_wait, struct ttm_mem_reg *new_mem);
+			      struct ttm_mem_reg *new_mem);
 /**
  * ttm_bo_free_old_node
 /**
  * ttm_bo_move_accel_cleanup.
+ *
  * @bo: A pointer to a struct ttm_buffer_object.
  * @sync_obj: A sync object that signals when moving is complete.
- * @sync_obj_arg: An argument to pass to the sync object idle / wait
- * functions.
  * @evict: This is an evict move. Don't return until the buffer is idle.
- * @no_wait: Never sleep, but rather return with -EBUSY.
+ * @no_wait_gpu: Return immediately if the GPU is busy.
  * @new_mem: struct ttm_mem_reg indicating where to move.
+ *
  * Accelerated move function to be called when an accelerated move
  * has been scheduled. The function will create a new temporary buffer object
  * representing the old placement, and put the sync object on both buffer
  * buffer moves.
  */
 extern int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo,
-				     void *sync_obj,
-				     void *sync_obj_arg,
+				     void *sync_obj,
-				     bool evict, bool no_wait,
+				     bool evict, bool no_wait_gpu,
 				     struct ttm_mem_reg *new_mem);
 /**
  * ttm_io_prot
+ *
  * @c_state: Caching state.
  * @tmp: Page protection flag for a normal, cached mapping.
+ *
  * Utility function that returns the pgprot_t that should be used for
  * setting up a PTE with the caching model indicated by @c_state.
  */
+extern pgprot_t ttm_io_prot(uint32_t caching_flags, pgprot_t tmp);
-extern pgprot_t ttm_io_prot(enum ttm_caching_state c_state, pgprot_t tmp);
+extern const struct ttm_mem_type_manager_func ttm_bo_manager_func;
 #if (defined(CONFIG_AGP) || (defined(CONFIG_AGP_MODULE) && defined(MODULE)))
 #define TTM_HAS_AGP
 #include
 /**
- * ttm_agp_backend_init
+ * ttm_agp_tt_create
+ *
+ * @bdev: Pointer to a struct ttm_bo_device.
+ * @bridge: The agp bridge this device is sitting on.
+ * @size: Size of the data needed backing.
  * @page_flags: Page flags as identified by TTM_PAGE_FLAG_XX flags.
- * @bdev: Pointer to a struct ttm_bo_device.
+ * @dummy_read_page: See struct ttm_bo_device.
  * @bridge: The agp bridge this device is sitting on.
+ *
  * Create a TTM backend that uses the indicated AGP bridge as an aperture
  * for TT memory. This function uses the linux agpgart interface to
  * bind and unbind memory backing a ttm_tt.
+ */
+extern struct ttm_tt *ttm_agp_tt_create(struct ttm_bo_device *bdev,
+					struct agp_bridge_data *bridge,
+					unsigned long size, uint32_t page_flags,
- */
+					struct page *dummy_read_page);
-extern struct ttm_backend *ttm_agp_backend_init(struct ttm_bo_device *bdev,
+int ttm_agp_tt_populate(struct ttm_tt *ttm);

Subversion Repositories Kolibri OS

(root)/drivers/include/drm/ttm/ttm_bo_driver.h – Rev 2003 → 3262