diff options
Diffstat (limited to 'include/drm/ttm')
| -rw-r--r-- | include/drm/ttm/ttm_bo_api.h | 38 | ||||
| -rw-r--r-- | include/drm/ttm/ttm_bo_driver.h | 64 | ||||
| -rw-r--r-- | include/drm/ttm/ttm_caching.h | 2 | ||||
| -rw-r--r-- | include/drm/ttm/ttm_device.h | 15 | ||||
| -rw-r--r-- | include/drm/ttm/ttm_kmap_iter.h | 61 | ||||
| -rw-r--r-- | include/drm/ttm/ttm_range_manager.h | 42 | ||||
| -rw-r--r-- | include/drm/ttm/ttm_resource.h | 113 | ||||
| -rw-r--r-- | include/drm/ttm/ttm_tt.h | 29 |
8 files changed, 254 insertions, 110 deletions
diff --git a/include/drm/ttm/ttm_bo_api.h b/include/drm/ttm/ttm_bo_api.h index 2155e2e38aec..f681bbdbc698 100644 --- a/include/drm/ttm/ttm_bo_api.h +++ b/include/drm/ttm/ttm_bo_api.h @@ -86,6 +86,7 @@ struct ttm_tt; * @base: drm_gem_object superclass data. * @bdev: Pointer to the buffer object device structure. * @type: The bo type. + * @page_alignment: Page alignment. * @destroy: Destruction function. If NULL, kfree is used. * @num_pages: Actual number of pages. * @kref: Reference count of this buffer object. When this refcount reaches @@ -123,6 +124,7 @@ struct ttm_buffer_object { struct ttm_device *bdev; enum ttm_bo_type type; + uint32_t page_alignment; void (*destroy) (struct ttm_buffer_object *); /** @@ -134,7 +136,7 @@ struct ttm_buffer_object { * Members protected by the bo::resv::reserved lock. */ - struct ttm_resource mem; + struct ttm_resource *resource; struct ttm_tt *ttm; bool deleted; @@ -523,19 +525,6 @@ void ttm_bo_vunmap(struct ttm_buffer_object *bo, struct dma_buf_map *map); 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. - * - * @filp: filp as input from the mmap method. - * @vma: vma as input from the mmap method. - * @bdev: Pointer to the ttm_device with the address space manager. - * - * This function is intended to be called by the device mmap method. - * if the device address space is to be backed by the bo manager. - */ -int ttm_bo_mmap(struct file *filp, struct vm_area_struct *vma, - struct ttm_device *bdev); - -/** * ttm_bo_io * * @bdev: Pointer to the struct ttm_device. @@ -563,25 +552,6 @@ int ttm_bo_swapout(struct ttm_buffer_object *bo, struct ttm_operation_ctx *ctx, gfp_t gfp_flags); /** - * 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; -} - -/** * ttm_bo_pin - Pin the buffer object. * @bo: The buffer object to pin * @@ -637,4 +607,6 @@ int ttm_bo_vm_access(struct vm_area_struct *vma, unsigned long addr, void *buf, int len, int write); bool ttm_bo_delayed_delete(struct ttm_device *bdev, bool remove_all); +vm_fault_t ttm_bo_vm_dummy_page(struct vm_fault *vmf, pgprot_t prot); + #endif diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h index dbccac957f8f..68d6069572aa 100644 --- a/include/drm/ttm/ttm_bo_driver.h +++ b/include/drm/ttm/ttm_bo_driver.h @@ -40,6 +40,7 @@ #include <drm/ttm/ttm_device.h> #include "ttm_bo_api.h" +#include "ttm_kmap_iter.h" #include "ttm_placement.h" #include "ttm_tt.h" #include "ttm_pool.h" @@ -96,7 +97,7 @@ struct ttm_lru_bulk_move { */ int ttm_bo_mem_space(struct ttm_buffer_object *bo, struct ttm_placement *placement, - struct ttm_resource *mem, + struct ttm_resource **mem, struct ttm_operation_ctx *ctx); /** @@ -181,15 +182,15 @@ static inline void ttm_bo_move_to_lru_tail_unlocked(struct ttm_buffer_object *bo) { spin_lock(&bo->bdev->lru_lock); - ttm_bo_move_to_lru_tail(bo, &bo->mem, NULL); + ttm_bo_move_to_lru_tail(bo, bo->resource, NULL); spin_unlock(&bo->bdev->lru_lock); } static inline void ttm_bo_assign_mem(struct ttm_buffer_object *bo, struct ttm_resource *new_mem) { - bo->mem = *new_mem; - new_mem->mm_node = NULL; + WARN_ON(bo->resource); + bo->resource = new_mem; } /** @@ -202,9 +203,7 @@ static inline void ttm_bo_assign_mem(struct ttm_buffer_object *bo, static inline void ttm_bo_move_null(struct ttm_buffer_object *bo, struct ttm_resource *new_mem) { - struct ttm_resource *old_mem = &bo->mem; - - WARN_ON(old_mem->mm_node != NULL); + ttm_resource_free(bo, &bo->resource); ttm_bo_assign_mem(bo, new_mem); } @@ -273,6 +272,23 @@ int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo, struct ttm_resource *new_mem); /** + * ttm_bo_move_accel_cleanup. + * + * @bo: A pointer to a struct ttm_buffer_object. + * @new_mem: struct ttm_resource indicating where to move. + * + * Special case of ttm_bo_move_accel_cleanup where the bo is guaranteed + * by the caller to be idle. Typically used after memcpy buffer moves. + */ +static inline void ttm_bo_move_sync_cleanup(struct ttm_buffer_object *bo, + struct ttm_resource *new_mem) +{ + int ret = ttm_bo_move_accel_cleanup(bo, NULL, true, false, new_mem); + + WARN_ON(ret); +} + +/** * ttm_bo_pipeline_gutting. * * @bo: A pointer to a struct ttm_buffer_object. @@ -306,30 +322,14 @@ int ttm_bo_tt_bind(struct ttm_buffer_object *bo, struct ttm_resource *mem); */ void ttm_bo_tt_destroy(struct ttm_buffer_object *bo); -/** - * ttm_range_man_init - * - * @bdev: ttm device - * @type: memory manager type - * @use_tt: if the memory manager uses tt - * @p_size: size of area to be managed in pages. - * - * Initialise a generic range manager for the selected memory type. - * The range manager is installed for this device in the type slot. - */ -int ttm_range_man_init(struct ttm_device *bdev, - unsigned type, bool use_tt, - unsigned long p_size); - -/** - * ttm_range_man_fini - * - * @bdev: ttm device - * @type: memory manager type - * - * Remove the generic range manager from a slot and tear it down. - */ -int ttm_range_man_fini(struct ttm_device *bdev, - unsigned type); +void ttm_move_memcpy(struct ttm_buffer_object *bo, + u32 num_pages, + struct ttm_kmap_iter *dst_iter, + struct ttm_kmap_iter *src_iter); +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); #endif diff --git a/include/drm/ttm/ttm_caching.h b/include/drm/ttm/ttm_caching.h index a0b4a49fa432..3c9dd65f5aaf 100644 --- a/include/drm/ttm/ttm_caching.h +++ b/include/drm/ttm/ttm_caching.h @@ -33,4 +33,6 @@ enum ttm_caching { ttm_cached }; +pgprot_t ttm_prot_from_caching(enum ttm_caching caching, pgprot_t tmp); + #endif diff --git a/include/drm/ttm/ttm_device.h b/include/drm/ttm/ttm_device.h index 7c8f87bd52d3..cd592f8e941b 100644 --- a/include/drm/ttm/ttm_device.h +++ b/include/drm/ttm/ttm_device.h @@ -162,21 +162,6 @@ struct ttm_device_funcs { struct ttm_place *hop); /** - * struct ttm_bo_driver_member verify_access - * - * @bo: Pointer to a buffer object. - * @filp: Pointer to a struct file trying to access the object. - * - * Called from the map / write / read methods to verify that the - * caller is permitted to access the buffer object. - * This member may be set to NULL, which will refuse this kind of - * access for all buffer objects. - * This function should return 0 if access is granted, -EPERM otherwise. - */ - int (*verify_access)(struct ttm_buffer_object *bo, - struct file *filp); - - /** * Hook to notify driver about a resource delete. */ void (*delete_mem_notify)(struct ttm_buffer_object *bo); diff --git a/include/drm/ttm/ttm_kmap_iter.h b/include/drm/ttm/ttm_kmap_iter.h new file mode 100644 index 000000000000..8bb00fd39d6c --- /dev/null +++ b/include/drm/ttm/ttm_kmap_iter.h @@ -0,0 +1,61 @@ +/* SPDX-License-Identifier: MIT */ +/* + * Copyright © 2021 Intel Corporation + */ +#ifndef __TTM_KMAP_ITER_H__ +#define __TTM_KMAP_ITER_H__ + +#include <linux/types.h> + +struct ttm_kmap_iter; +struct dma_buf_map; + +/** + * struct ttm_kmap_iter_ops - Ops structure for a struct + * ttm_kmap_iter. + * @maps_tt: Whether the iterator maps TT memory directly, as opposed + * mapping a TT through an aperture. Both these modes have + * struct ttm_resource_manager::use_tt set, but the latter typically + * returns is_iomem == true from ttm_mem_io_reserve. + */ +struct ttm_kmap_iter_ops { + /** + * kmap_local() - Map a PAGE_SIZE part of the resource using + * kmap_local semantics. + * @res_iter: Pointer to the struct ttm_kmap_iter representing + * the resource. + * @dmap: The struct dma_buf_map holding the virtual address after + * the operation. + * @i: The location within the resource to map. PAGE_SIZE granularity. + */ + void (*map_local)(struct ttm_kmap_iter *res_iter, + struct dma_buf_map *dmap, pgoff_t i); + /** + * unmap_local() - Unmap a PAGE_SIZE part of the resource previously + * mapped using kmap_local. + * @res_iter: Pointer to the struct ttm_kmap_iter representing + * the resource. + * @dmap: The struct dma_buf_map holding the virtual address after + * the operation. + */ + void (*unmap_local)(struct ttm_kmap_iter *res_iter, + struct dma_buf_map *dmap); + bool maps_tt; +}; + +/** + * struct ttm_kmap_iter - Iterator for kmap_local type operations on a + * resource. + * @ops: Pointer to the operations struct. + * + * This struct is intended to be embedded in a resource-specific specialization + * implementing operations for the resource. + * + * Nothing stops us from extending the operations to vmap, vmap_pfn etc, + * replacing some or parts of the ttm_bo_util. cpu-map functionality. + */ +struct ttm_kmap_iter { + const struct ttm_kmap_iter_ops *ops; +}; + +#endif /* __TTM_KMAP_ITER_H__ */ diff --git a/include/drm/ttm/ttm_range_manager.h b/include/drm/ttm/ttm_range_manager.h new file mode 100644 index 000000000000..22b6fa42ac20 --- /dev/null +++ b/include/drm/ttm/ttm_range_manager.h @@ -0,0 +1,42 @@ +/* SPDX-License-Identifier: GPL-2.0 OR MIT */ + +#ifndef _TTM_RANGE_MANAGER_H_ +#define _TTM_RANGE_MANAGER_H_ + +#include <drm/ttm/ttm_resource.h> +#include <drm/drm_mm.h> + +/** + * struct ttm_range_mgr_node + * + * @base: base clase we extend + * @mm_nodes: MM nodes, usually 1 + * + * Extending the ttm_resource object to manage an address space allocation with + * one or more drm_mm_nodes. + */ +struct ttm_range_mgr_node { + struct ttm_resource base; + struct drm_mm_node mm_nodes[]; +}; + +/** + * to_ttm_range_mgr_node + * + * @res: the resource to upcast + * + * Upcast the ttm_resource object into a ttm_range_mgr_node object. + */ +static inline struct ttm_range_mgr_node * +to_ttm_range_mgr_node(struct ttm_resource *res) +{ + return container_of(res, struct ttm_range_mgr_node, base); +} + +int ttm_range_man_init(struct ttm_device *bdev, + unsigned type, bool use_tt, + unsigned long p_size); +int ttm_range_man_fini(struct ttm_device *bdev, + unsigned type); + +#endif diff --git a/include/drm/ttm/ttm_resource.h b/include/drm/ttm/ttm_resource.h index 6164ccf4f308..140b6b9a8bbe 100644 --- a/include/drm/ttm/ttm_resource.h +++ b/include/drm/ttm/ttm_resource.h @@ -27,9 +27,11 @@ #include <linux/types.h> #include <linux/mutex.h> +#include <linux/dma-buf-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 @@ -38,6 +40,10 @@ struct ttm_resource_manager; struct ttm_resource; struct ttm_place; struct ttm_buffer_object; +struct dma_buf_map; +struct io_mapping; +struct sg_table; +struct scatterlist; struct ttm_resource_manager_func { /** @@ -45,46 +51,38 @@ struct ttm_resource_manager_func { * * @man: Pointer to a memory type manager. * @bo: Pointer to the buffer object we're allocating space for. - * @placement: Placement details. - * @flags: Additional placement flags. - * @mem: Pointer to a struct ttm_resource to be filled in. + * @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 @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 + * 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 memory region accommodate the buffer object, @mem::mm_node - * should be set to NULL, and the function should return 0. + * 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. * - * Note that @mem::mm_node will only be dereferenced by - * struct ttm_resource_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. + * 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 *mem); + struct ttm_resource **res); /** * struct ttm_resource_manager_func member free * * @man: Pointer to a memory type manager. - * @mem: Pointer to a struct ttm_resource to be filled in. + * @res: Pointer to a struct ttm_resource to be freed. * - * 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. + * 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 *mem); + struct ttm_resource *res); /** * struct ttm_resource_manager_func member debug @@ -158,10 +156,9 @@ struct ttm_bus_placement { /** * struct ttm_resource * - * @mm_node: Memory manager node. - * @size: Requested size of memory region. - * @num_pages: Actual size of memory region in pages. - * @page_alignment: Page alignment. + * @start: Start of the allocation. + * @num_pages: Actual size of resource in pages. + * @mem_type: Resource type of the allocation. * @placement: Placement flags. * @bus: Placement on io bus accessible to the CPU * @@ -169,16 +166,53 @@ struct ttm_bus_placement { * buffer object. */ struct ttm_resource { - void *mm_node; unsigned long start; unsigned long num_pages; - uint32_t page_alignment; uint32_t mem_type; uint32_t placement; struct ttm_bus_placement bus; }; /** + * 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 dma_buf_map dmap; + bool needs_unmap; +}; + +/** * ttm_resource_manager_set_used * * @man: A memory manager object. @@ -225,10 +259,13 @@ ttm_resource_manager_cleanup(struct ttm_resource_manager *man) man->move = NULL; } +void ttm_resource_init(struct ttm_buffer_object *bo, + const struct ttm_place *place, + 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); + struct ttm_resource **res); +void ttm_resource_free(struct ttm_buffer_object *bo, struct ttm_resource **res); void ttm_resource_manager_init(struct ttm_resource_manager *man, unsigned long p_size); @@ -239,4 +276,20 @@ int ttm_resource_manager_evict_all(struct ttm_device *bdev, void ttm_resource_manager_debug(struct ttm_resource_manager *man, struct drm_printer *p); +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); #endif diff --git a/include/drm/ttm/ttm_tt.h b/include/drm/ttm/ttm_tt.h index 134d09ef7766..818680c6a8ed 100644 --- a/include/drm/ttm/ttm_tt.h +++ b/include/drm/ttm/ttm_tt.h @@ -29,6 +29,7 @@ #include <linux/types.h> #include <drm/ttm/ttm_caching.h> +#include <drm/ttm/ttm_kmap_iter.h> struct ttm_bo_device; struct ttm_tt; @@ -69,6 +70,18 @@ struct ttm_tt { enum ttm_caching caching; }; +/** + * struct ttm_kmap_iter_tt - Specialization of a mappig iterator for a tt. + * @base: Embedded struct ttm_kmap_iter providing the usage interface + * @tt: Cached struct ttm_tt. + * @prot: Cached page protection for mapping. + */ +struct ttm_kmap_iter_tt { + struct ttm_kmap_iter base; + struct ttm_tt *tt; + pgprot_t prot; +}; + static inline bool ttm_tt_is_populated(struct ttm_tt *tt) { return tt->page_flags & TTM_PAGE_FLAG_PRIV_POPULATED; @@ -157,8 +170,24 @@ int ttm_tt_populate(struct ttm_device *bdev, struct ttm_tt *ttm, struct ttm_oper */ void ttm_tt_unpopulate(struct ttm_device *bdev, struct ttm_tt *ttm); +/** + * ttm_tt_mark_for_clear - Mark pages for clearing on populate. + * + * @ttm: Pointer to the ttm_tt structure + * + * Marks pages for clearing so that the next time the page vector is + * populated, the pages will be cleared. + */ +static inline void ttm_tt_mark_for_clear(struct ttm_tt *ttm) +{ + ttm->page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC; +} + void ttm_tt_mgr_init(unsigned long num_pages, unsigned long num_dma32_pages); +struct ttm_kmap_iter *ttm_kmap_iter_tt_init(struct ttm_kmap_iter_tt *iter_tt, + struct ttm_tt *tt); + #if IS_ENABLED(CONFIG_AGP) #include <linux/agp_backend.h> |