diff options
Diffstat (limited to 'include/drm/ttm/ttm_bo_api.h')
| -rw-r--r-- | include/drm/ttm/ttm_bo_api.h | 131 |
1 files changed, 53 insertions, 78 deletions
diff --git a/include/drm/ttm/ttm_bo_api.h b/include/drm/ttm/ttm_bo_api.h index 49d9cdfc58f2..66ca49db9633 100644 --- a/include/drm/ttm/ttm_bo_api.h +++ b/include/drm/ttm/ttm_bo_api.h @@ -31,6 +31,7 @@ #ifndef _TTM_BO_API_H_ #define _TTM_BO_API_H_ +#include <drm/drm_gem.h> #include <drm/drm_hashtab.h> #include <drm/drm_vma_manager.h> #include <linux/kref.h> @@ -39,7 +40,7 @@ #include <linux/mutex.h> #include <linux/mm.h> #include <linux/bitmap.h> -#include <linux/reservation.h> +#include <linux/dma-resv.h> struct ttm_bo_global; @@ -127,6 +128,7 @@ struct ttm_tt; /** * struct ttm_buffer_object * + * @base: drm_gem_object superclass data. * @bdev: Pointer to the buffer object device structure. * @type: The bo type. * @destroy: Destruction function. If NULL, kfree is used. @@ -145,16 +147,13 @@ struct ttm_tt; * holds a pointer to a persistent shmem object. * @ttm: TTM structure holding system pages. * @evicted: Whether the object was evicted without user-space knowing. - * @cpu_writes: For synchronization. Number of cpu writers. * @lru: List head for the lru list. * @ddestroy: List head for the delayed destroy list. * @swap: List head for swap LRU list. * @moving: Fence set when BO is moving - * @vma_node: Address space manager node. * @offset: The current GPU offset, which can have different meanings * depending on the memory type. For SYSTEM type memory, it should be 0. * @cur_placement: Hint of current placement. - * @wu_mutex: Wait unreserved mutex. * * Base class for TTM buffer object, that deals with data placement and CPU * mappings. GPU mappings are really up to the driver, but for simpler GPUs @@ -169,6 +168,8 @@ struct ttm_tt; */ struct ttm_buffer_object { + struct drm_gem_object base; + /** * Members constant at init. */ @@ -196,12 +197,6 @@ struct ttm_buffer_object { bool evicted; /** - * Members protected by the bo::reserved lock only when written to. - */ - - atomic_t cpu_writers; - - /** * Members protected by the bdev::lru_lock. */ @@ -215,9 +210,6 @@ struct ttm_buffer_object { */ struct dma_fence *moving; - - struct drm_vma_offset_node vma_node; - unsigned priority; /** @@ -229,10 +221,6 @@ struct ttm_buffer_object { uint64_t offset; /* GPU address space is independent of CPU word size */ struct sg_table *sg; - - struct reservation_object *resv; - struct reservation_object ttm_resv; - struct mutex wu_mutex; }; /** @@ -275,7 +263,7 @@ struct ttm_bo_kmap_obj { struct ttm_operation_ctx { bool interruptible; bool no_wait_gpu; - struct reservation_object *resv; + struct dma_resv *resv; uint64_t bytes_moved; uint32_t flags; }; @@ -370,30 +358,6 @@ int ttm_bo_validate(struct ttm_buffer_object *bo, void ttm_bo_put(struct ttm_buffer_object *bo); /** - * ttm_bo_add_to_lru - * - * @bo: The buffer object. - * - * Add this bo to the relevant mem type lru and, if it's backed by - * system pages (ttms) to the swap list. - * This function must be called with struct ttm_bo_global::lru_lock held, and - * is typically called immediately prior to unreserving a bo. - */ -void ttm_bo_add_to_lru(struct ttm_buffer_object *bo); - -/** - * ttm_bo_del_from_lru - * - * @bo: The buffer object. - * - * Remove this bo from all lru lists used to lookup and reserve an object. - * This function must be called with struct ttm_bo_global::lru_lock held, - * and is usually called just immediately after the bo has been reserved to - * avoid recursive reservation from lru lists. - */ -void ttm_bo_del_from_lru(struct ttm_buffer_object *bo); - -/** * ttm_bo_move_to_lru_tail * * @bo: The buffer object. @@ -444,31 +408,6 @@ bool ttm_bo_eviction_valuable(struct ttm_buffer_object *bo, const struct ttm_place *place); /** - * ttm_bo_synccpu_write_grab - * - * @bo: The buffer object: - * @no_wait: Return immediately if buffer is busy. - * - * Synchronizes a buffer object for CPU RW access. This means - * command submission that affects the buffer will return -EBUSY - * until ttm_bo_synccpu_write_release is called. - * - * Returns - * -EBUSY if the buffer is busy and no_wait is true. - * -ERESTARTSYS if interrupted by a signal. - */ -int ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait); - -/** - * ttm_bo_synccpu_write_release: - * - * @bo : The buffer object. - * - * Releases a synccpu lock. - */ -void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo); - -/** * ttm_bo_acc_size * * @bdev: Pointer to a ttm_bo_device struct. @@ -495,7 +434,7 @@ size_t ttm_bo_dma_acc_size(struct ttm_bo_device *bdev, * @page_alignment: Data alignment in pages. * @ctx: TTM operation context for memory allocation. * @acc_size: Accounted size for this object. - * @resv: Pointer to a reservation_object, or NULL to let ttm allocate one. + * @resv: Pointer to a dma_resv, or NULL to let ttm allocate one. * @destroy: Destroy function. Use NULL for kfree(). * * This function initializes a pre-allocated struct ttm_buffer_object. @@ -528,7 +467,7 @@ int ttm_bo_init_reserved(struct ttm_bo_device *bdev, struct ttm_operation_ctx *ctx, size_t acc_size, struct sg_table *sg, - struct reservation_object *resv, + struct dma_resv *resv, void (*destroy) (struct ttm_buffer_object *)); /** @@ -547,7 +486,7 @@ int ttm_bo_init_reserved(struct ttm_bo_device *bdev, * point to the shmem object backing a GEM object if TTM is used to back a * GEM user interface. * @acc_size: Accounted size for this object. - * @resv: Pointer to a reservation_object, or NULL to let ttm allocate one. + * @resv: Pointer to a dma_resv, or NULL to let ttm allocate one. * @destroy: Destroy function. Use NULL for kfree(). * * This function initializes a pre-allocated struct ttm_buffer_object. @@ -572,7 +511,7 @@ int ttm_bo_init(struct ttm_bo_device *bdev, struct ttm_buffer_object *bo, unsigned long size, enum ttm_bo_type type, struct ttm_placement *placement, uint32_t page_alignment, bool interrubtible, size_t acc_size, - struct sg_table *sg, struct reservation_object *resv, + struct sg_table *sg, struct dma_resv *resv, void (*destroy) (struct ttm_buffer_object *)); /** @@ -712,16 +651,14 @@ int ttm_bo_kmap(struct ttm_buffer_object *bo, unsigned long start_page, void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map); /** - * ttm_fbdev_mmap - mmap fbdev memory backed by a ttm buffer object. + * ttm_bo_mmap_obj - mmap memory backed by a ttm buffer object. * * @vma: vma as input from the fbdev mmap method. - * @bo: The bo backing the address space. The address space will - * have the same size as the bo, and start at offset 0. + * @bo: The bo backing the address space. * - * This function is intended to be called by the fbdev mmap method - * if the fbdev address space is to be backed by a bo. + * Maps a buffer object. */ -int ttm_fbdev_mmap(struct vm_area_struct *vma, struct ttm_buffer_object *bo); +int ttm_bo_mmap_obj(struct vm_area_struct *vma, struct ttm_buffer_object *bo); /** * ttm_bo_mmap - mmap out of the ttm device address space. @@ -767,5 +704,43 @@ ssize_t ttm_bo_io(struct ttm_bo_device *bdev, struct file *filp, int ttm_bo_swapout(struct ttm_bo_global *glob, struct ttm_operation_ctx *ctx); void ttm_bo_swapout_all(struct ttm_bo_device *bdev); -int ttm_bo_wait_unreserved(struct ttm_buffer_object *bo); + +/** + * ttm_bo_uses_embedded_gem_object - check if the given bo uses the + * embedded drm_gem_object. + * + * Most ttm drivers are using gem too, so the embedded + * ttm_buffer_object.base will be initialized by the driver (before + * calling ttm_bo_init). It is also possible to use ttm without gem + * though (vmwgfx does that). + * + * This helper will figure whenever a given ttm bo is a gem object too + * or not. + * + * @bo: The bo to check. + */ +static inline bool ttm_bo_uses_embedded_gem_object(struct ttm_buffer_object *bo) +{ + return bo->base.dev != NULL; +} + +/* Default number of pre-faulted pages in the TTM fault handler */ +#define TTM_BO_VM_NUM_PREFAULT 16 + +vm_fault_t ttm_bo_vm_reserve(struct ttm_buffer_object *bo, + struct vm_fault *vmf); + +vm_fault_t ttm_bo_vm_fault_reserved(struct vm_fault *vmf, + pgprot_t prot, + pgoff_t num_prefault); + +vm_fault_t ttm_bo_vm_fault(struct vm_fault *vmf); + +void ttm_bo_vm_open(struct vm_area_struct *vma); + +void ttm_bo_vm_close(struct vm_area_struct *vma); + +int ttm_bo_vm_access(struct vm_area_struct *vma, unsigned long addr, + void *buf, int len, int write); + #endif |
