| 30,97 → 30,56 |
|---|
| #ifndef _TTM_BO_DRIVER_H_ |
| #define _TTM_BO_DRIVER_H_ |
| |
| #include "ttm/ttm_bo_api.h" |
| #include "ttm/ttm_memory.h" |
| #include "ttm/ttm_module.h" |
| #include "drm_mm.h" |
| #include "linux/spinlock.h" |
| #include <ttm/ttm_bo_api.h> |
| #include <ttm/ttm_memory.h> |
| #include <ttm/ttm_module.h> |
| #include <drm/drm_mm.h> |
| #include <drm/drm_global.h> |
| //#include <linux/workqueue.h> |
| //#include <linux/fs.h> |
| #include <linux/spinlock.h> |
| |
| struct ttm_backend; |
| |
| 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 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 |
| * |
| * @backend: Pointer to a struct ttm_backend. |
| * @ttm: Pointer to a struct ttm_tt. |
| * |
| * Destroy the backend. |
| * Destroy the backend. This will be call back from ttm_tt_destroy so |
| * don't call ttm_tt_destroy from the callback or infinite loop. |
| */ |
| void (*destroy) (struct ttm_backend *backend); |
| void (*destroy) (struct ttm_tt *ttm); |
| }; |
| |
| /** |
| * 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 { |
| struct ttm_bo_device *bdev; |
| uint32_t flags; |
| struct ttm_backend_func *func; |
| }; |
| |
| #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_SWAPPED (1 << 4) |
| #define TTM_PAGE_FLAG_PERSISTENT_SWAP (1 << 5) |
| #define TTM_PAGE_FLAG_ZERO_ALLOC (1 << 6) |
| #define TTM_PAGE_FLAG_DMA32 (1 << 7) |
| #define TTM_PAGE_FLAG_SG (1 << 8) |
| |
| enum ttm_caching_state { |
| tt_uncached, |
| 131,23 → 90,18 |
|---|
| /** |
| * struct ttm_tt |
| * |
| * @bdev: Pointer to a struct ttm_bo_device. |
| * @func: Pointer to a struct ttm_backend_func that describes |
| * the backend methods. |
| * @dummy_read_page: Page to map where the ttm_tt page array contains a NULL |
| * pointer. |
| * @pages: Array of pages backing the data. |
| * @first_himem_page: Himem pages are put last in the page array, which |
| * 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. |
| * @last_lomem_page: Index of the last lomem page in the page array. |
| * @num_pages: Number of pages in the page array. |
| * @bdev: Pointer to the current struct ttm_bo_device. |
| * @be: Pointer to the ttm backend. |
| * @tsk: The task for user ttm. |
| * @start: virtual address for user ttm. |
| * @swap_storage: Pointer to shmem struct file for swap storage. |
| * @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) |
| 155,16 → 109,14 |
|---|
| */ |
| |
| struct ttm_tt { |
| struct ttm_bo_device *bdev; |
| struct ttm_backend_func *func; |
| struct page *dummy_read_page; |
| struct page **pages; |
| long first_himem_page; |
| long last_lomem_page; |
| uint32_t page_flags; |
| unsigned long num_pages; |
| struct sg_table *sg; /* for SG objects via dma-buf */ |
| struct ttm_bo_global *glob; |
| struct ttm_backend *be; |
| struct task_struct *tsk; |
| unsigned long start; |
| struct file *swap_storage; |
| enum ttm_caching_state caching_state; |
| enum { |
| 172,7 → 124,23 |
|---|
| tt_unbound, |
| tt_unpopulated, |
| } state; |
| }; |
| |
| /** |
| * struct ttm_dma_tt |
| * |
| * @ttm: Base ttm_tt struct. |
| * @dma_address: The DMA (bus) addresses of the pages |
| * @pages_list: used by some page allocation backend |
| * |
| * 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_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 */ |
| 179,7 → 147,91 |
|---|
| #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 |
| * |
| * @man: Pointer to a memory type manager. |
| * @prefix: 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_mem_type_manager *man, const char *prefix); |
| }; |
| |
| /** |
| * struct ttm_mem_type_manager |
| * |
| * @has_type: The memory type has been initialized. |
| 263,17 → 315,44 |
|---|
| |
| struct ttm_bo_driver { |
| /** |
| * struct ttm_bo_driver member create_ttm_backend_entry |
| * ttm_tt_create |
| * |
| * @bdev: The buffer object device. |
| * @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 driver specific struct ttm_backend. |
| * Create a struct ttm_tt to back data with system memory pages. |
| * No pages are actually allocated. |
| * Returns: |
| * 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); |
| |
| struct ttm_backend *(*create_ttm_backend_entry) |
| (struct ttm_bo_device *bdev); |
| /** |
| * 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 |
| */ |
| void (*ttm_tt_unpopulate)(struct ttm_tt *ttm); |
| |
| /** |
| * struct ttm_bo_driver member invalidate_caches |
| * |
| * @bdev: the buffer object device. |
| 315,7 → 394,8 |
|---|
| */ |
| int (*move) (struct ttm_buffer_object *bo, |
| bool evict, bool interruptible, |
| bool no_wait, struct ttm_mem_reg *new_mem); |
| bool no_wait_gpu, |
| struct ttm_mem_reg *new_mem); |
| |
| /** |
| * struct ttm_bo_driver_member verify_access |
| 342,10 → 422,10 |
|---|
| * documentation. |
| */ |
| |
| bool (*sync_obj_signaled) (void *sync_obj, void *sync_arg); |
| int (*sync_obj_wait) (void *sync_obj, void *sync_arg, |
| bool (*sync_obj_signaled) (void *sync_obj); |
| 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); |
| |
| 355,7 → 435,21 |
|---|
| struct ttm_mem_reg *new_mem); |
| /* notify the driver we are taking a fault on this BO |
| * and have reserved it */ |
| void (*fault_reserve_notify)(struct ttm_buffer_object *bo); |
| 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. |
| */ |
| int (*io_mem_reserve)(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem); |
| void (*io_mem_free)(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem); |
| }; |
| |
| /** |
| 363,7 → 457,7 |
|---|
| */ |
| |
| struct ttm_bo_global_ref { |
| struct ttm_global_reference ref; |
| struct drm_global_reference ref; |
| struct ttm_mem_global *mem_glob; |
| }; |
| |
| 374,9 → 468,6 |
|---|
| * @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. |
| * @ttm_bo_extra_size: Extra size (sizeof(struct ttm_buffer_object) excluded) |
| * used by a buffer object. This is excluding page arrays and backing pages. |
| * @ttm_bo_size: This is @ttm_bo_extra_size + sizeof(struct ttm_buffer_object). |
| * @device_list_mutex: Mutex protecting the device list. |
| * This mutex is held while traversing the device list for pm options. |
| * @lru_lock: Spinlock protecting the bo subsystem lru lists. |
| 394,8 → 485,6 |
|---|
| 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 mutex device_list_mutex; |
| spinlock_t lru_lock; |
| |
| 426,11 → 515,12 |
|---|
| * |
| * @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. |
| 447,10 → 537,11 |
|---|
| struct ttm_bo_driver *driver; |
| 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; |
| |
| /* |
| 457,12 → 548,12 |
|---|
| * Protected by the global:lru lock. |
| */ |
| struct list_head ddestroy; |
| uint32_t val_seq; |
| |
| /* |
| * Protected by load / firstopen / lastclose /unload sync. |
| */ |
| |
| bool nice_mode; |
| struct address_space *dev_mapping; |
| |
| /* |
| 469,7 → 560,7 |
|---|
| * Internal protection. |
| */ |
| |
| // struct delayed_work wq; |
| struct delayed_work wq; |
| |
| bool need_dma32; |
| }; |
| 492,8 → 583,9 |
|---|
| } |
| |
| /** |
| * 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. |
| 504,29 → 596,23 |
|---|
| * Returns: |
| * NULL: Out of memory. |
| */ |
| extern struct ttm_tt *ttm_tt_create(struct ttm_bo_device *bdev, |
| unsigned long size, |
| uint32_t page_flags, |
| 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); |
| extern int ttm_dma_tt_init(struct ttm_dma_tt *ttm_dma, struct ttm_bo_device *bdev, |
| unsigned long size, uint32_t page_flags, |
| 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 void ttm_tt_fini(struct ttm_tt *ttm); |
| extern void ttm_dma_tt_fini(struct ttm_dma_tt *ttm_dma); |
| |
| extern int ttm_tt_set_user(struct ttm_tt *ttm, |
| struct task_struct *tsk, |
| unsigned long start, unsigned long num_pages); |
| |
| /** |
| * ttm_ttm_bind: |
| * |
| 538,20 → 624,11 |
|---|
| 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); |
| |
| 565,19 → 642,13 |
|---|
| 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. |
| * |
| * 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: |
| 606,7 → 677,7 |
|---|
| */ |
| 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 |
| 632,7 → 703,7 |
|---|
| * @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. |
| 646,44 → 717,17 |
|---|
| 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); |
| /** |
| * ttm_bo_wait_for_cpu |
| * |
| * @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. |
| */ |
| bool interruptible, |
| bool no_wait_gpu); |
| |
| extern int ttm_bo_wait_cpu(struct ttm_buffer_object *bo, bool no_wait); |
| extern void ttm_bo_mem_put(struct ttm_buffer_object *bo, |
| struct ttm_mem_reg *mem); |
| extern void ttm_bo_mem_put_locked(struct ttm_buffer_object *bo, |
| struct ttm_mem_reg *mem); |
| |
| /** |
| * 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 void ttm_bo_global_release(struct drm_global_reference *ref); |
| extern int ttm_bo_global_init(struct drm_global_reference *ref); |
| |
| extern int ttm_bo_pci_offset(struct ttm_bo_device *bdev, |
| struct ttm_mem_reg *mem, |
| unsigned long *bus_base, |
| unsigned long *bus_offset, |
| unsigned long *bus_size); |
| |
| extern void ttm_bo_global_release(struct ttm_global_reference *ref); |
| extern int ttm_bo_global_init(struct ttm_global_reference *ref); |
| |
| extern int ttm_bo_device_release(struct ttm_bo_device *bdev); |
| |
| /** |
| 690,7 → 734,7 |
|---|
| * 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. |
| * @file_page_offset: Offset into the device address space that is available |
| * for buffer data. This ensures compatibility with other users of the |
| 713,6 → 757,22 |
|---|
| 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. |
| 729,7 → 789,7 |
|---|
| * 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 |
| 762,59 → 822,74 |
|---|
| * 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 |
| * it to become unreserved if @sequence < (@bo)->sequence. |
| * |
| * Unreserve a previous reservation of @bo. |
| * 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 |
| * be returned if @use_sequence is set to true. |
| */ |
| extern void ttm_bo_unreserve(struct ttm_buffer_object *bo); |
| extern int ttm_bo_reserve_locked(struct ttm_buffer_object *bo, |
| bool interruptible, |
| bool no_wait, bool use_sequence, |
| 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. |
| * 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 |
| * ttm_bo_unreserve_locked |
| * |
| * @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. |
| * This is intended for single buffer use only without eviction, |
| * and thus needs no deadlock protection. |
| * |
| * Returns: |
| * -EBUSY: If no_wait == 1 and the buffer is already reserved. |
| * -ERESTARTSYS: If interruptible == 1 and the process received a signal |
| * while sleeping. |
| * Unreserve a previous reservation of @bo. |
| * 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_unblock_reservation |
| * ttm_bo_wait_unreserved |
| * |
| * @bo: A pointer to a struct ttm_buffer_object. |
| * |
| * Unblocks reservation leaving lru lists untouched. |
| * 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. |
| */ |
| extern void ttm_bo_unblock_reservation(struct ttm_buffer_object *bo); |
| extern int ttm_bo_wait_unreserved(struct ttm_buffer_object *bo, |
| bool interruptible); |
| |
| /* |
| * ttm_bo_util.c |
| 825,7 → 900,7 |
|---|
| * |
| * @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. |
| * |
| * Optimized move function for a buffer object with both old and |
| 839,7 → 914,7 |
|---|
| */ |
| |
| 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); |
| |
| /** |
| 847,7 → 922,7 |
|---|
| * |
| * @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. |
| 861,8 → 936,8 |
|---|
| */ |
| |
| extern int ttm_bo_move_memcpy(struct ttm_buffer_object *bo, |
| bool evict, |
| bool no_wait, struct ttm_mem_reg *new_mem); |
| bool evict, bool no_wait_gpu, |
| struct ttm_mem_reg *new_mem); |
| |
| /** |
| * ttm_bo_free_old_node |
| 878,10 → 953,8 |
|---|
| * |
| * @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 |
| 894,8 → 967,7 |
|---|
| |
| extern int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo, |
| void *sync_obj, |
| void *sync_obj_arg, |
| bool evict, bool no_wait, |
| bool evict, bool no_wait_gpu, |
| struct ttm_mem_reg *new_mem); |
| /** |
| * ttm_io_prot |
| 906,24 → 978,34 |
|---|
| * 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(enum ttm_caching_state c_state, pgprot_t tmp); |
| extern pgprot_t ttm_io_prot(uint32_t caching_flags, 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 <linux/agp_backend.h> |
| |
| /** |
| * 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. |
| * @dummy_read_page: See struct ttm_bo_device. |
| * |
| * |
| * 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_backend *ttm_agp_backend_init(struct ttm_bo_device *bdev, |
| struct agp_bridge_data *bridge); |
| 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); |
| int ttm_agp_tt_populate(struct ttm_tt *ttm); |
| void ttm_agp_tt_unpopulate(struct ttm_tt *ttm); |
| #endif |
| |
| #endif |