diff --git a/drivers/include/ddk.h b/drivers/include/ddk.h index 429206cfae..eb4afb7377 100644 --- a/drivers/include/ddk.h +++ b/drivers/include/ddk.h @@ -13,7 +13,10 @@ #define OS_BASE 0x80000000 #define PG_SW 0x003 -#define PG_NOCACHE 0x010 +#define PG_UW 0x007 +#define PG_NOCACHE 0x018 +#define PG_SHARED 0x200 + #define MANUAL_DESTROY 0x80000000 diff --git a/drivers/include/drm/drmP.h b/drivers/include/drm/drmP.h index e81a182bbc..48bd11d39b 100644 --- a/drivers/include/drm/drmP.h +++ b/drivers/include/drm/drmP.h @@ -171,7 +171,7 @@ int drm_err(const char *func, const char *format, ...); /** \name Begin the DRM... */ /*@{*/ -#define DRM_DEBUG_CODE 0 /**< Include debugging code if > 1, then +#define DRM_DEBUG_CODE 2 /**< Include debugging code if > 1, then also include looping detection. */ #define DRM_MAGIC_HASH_ORDER 4 /**< Size of key hash table. Must be power of 2. */ @@ -959,9 +959,14 @@ struct drm_driver { #define DRM_IRQ_ARGS int irq, void *arg struct drm_driver { + int (*open) (struct drm_device *, struct drm_file *); + irqreturn_t (*irq_handler) (DRM_IRQ_ARGS); void (*irq_preinstall) (struct drm_device *dev); int (*irq_postinstall) (struct drm_device *dev); + + int (*gem_init_object) (struct drm_gem_object *obj); + void (*gem_free_object) (struct drm_gem_object *obj); int (*gem_open_object) (struct drm_gem_object *, struct drm_file *); void (*gem_close_object) (struct drm_gem_object *, struct drm_file *); }; diff --git a/drivers/include/drm/drm_crtc.h b/drivers/include/drm/drm_crtc.h index b3ba730850..9626b6c3ec 100644 --- a/drivers/include/drm/drm_crtc.h +++ b/drivers/include/drm/drm_crtc.h @@ -244,6 +244,16 @@ struct drm_framebuffer_funcs { struct drm_framebuffer { struct drm_device *dev; + /* + * Note that the fb is refcounted for the benefit of driver internals, + * for example some hw, disabling a CRTC/plane is asynchronous, and + * scanout does not actually complete until the next vblank. So some + * cleanup (like releasing the reference(s) on the backing GEM bo(s)) + * should be deferred. In cases like this, the driver would like to + * hold a ref to the fb even though it has already been removed from + * userspace perspective. + */ + struct kref refcount; struct list_head head; struct drm_mode_object base; const struct drm_framebuffer_funcs *funcs; diff --git a/drivers/include/drm/ttm/ttm_bo_api.h b/drivers/include/drm/ttm/ttm_bo_api.h index 592dbde761..00137a9d96 100644 --- a/drivers/include/drm/ttm/ttm_bo_api.h +++ b/drivers/include/drm/ttm/ttm_bo_api.h @@ -1,643 +1,742 @@ -/************************************************************************** - * - * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA - * All Rights Reserved. - * - * 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, sub license, 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 (including the - * next paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL - * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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: Thomas Hellstrom - */ - -#ifndef _TTM_BO_API_H_ -#define _TTM_BO_API_H_ - -#include "drm_hashtab.h" -#include -#include -//#include -#include -//#include -//#include -#include - -struct ttm_bo_device; - -struct drm_mm_node; - - -/** - * struct ttm_placement - * - * @fpfn: first valid page frame number to put the object - * @lpfn: last valid page frame number to put the object - * @num_placement: number of prefered placements - * @placement: prefered placements - * @num_busy_placement: number of prefered placements when need to evict buffer - * @busy_placement: prefered placements when need to evict buffer - * - * Structure indicating the placement you request for an object. - */ -struct ttm_placement { - unsigned fpfn; - unsigned lpfn; - unsigned num_placement; - const uint32_t *placement; - unsigned num_busy_placement; - const uint32_t *busy_placement; -}; - - -/** - * struct ttm_mem_reg - * - * @mm_node: Memory manager node. - * @size: Requested size of memory region. - * @num_pages: Actual size of memory region in pages. - * @page_alignment: Page alignment. - * @placement: Placement flags. - * - * Structure indicating the placement and space resources used by a - * buffer object. - */ - -struct ttm_mem_reg { - void *mm_node; - unsigned long start; - unsigned long size; - unsigned long num_pages; - uint32_t page_alignment; - uint32_t mem_type; - uint32_t placement; -// struct ttm_bus_placement bus; -}; - - -/** - * enum ttm_bo_type - * - * @ttm_bo_type_device: These are 'normal' buffers that can - * be mmapped by user space. Each of these bos occupy a slot in the - * device address space, that can be used for normal vm operations. - * - * @ttm_bo_type_user: These are user-space memory areas that are made - * available to the GPU by mapping the buffer pages into the GPU aperture - * space. These buffers cannot be mmaped from the device address space. - * - * @ttm_bo_type_kernel: These buffers are like ttm_bo_type_device buffers, - * but they cannot be accessed from user-space. For kernel-only use. - */ - -enum ttm_bo_type { - ttm_bo_type_device, - ttm_bo_type_user, - ttm_bo_type_kernel -}; - -struct ttm_tt; - -/** - * struct ttm_buffer_object - * - * @bdev: Pointer to the buffer object device structure. - * @buffer_start: The virtual user-space start address of ttm_bo_type_user - * buffers. - * @type: The bo type. - * @destroy: Destruction function. If NULL, kfree is used. - * @num_pages: Actual number of pages. - * @addr_space_offset: Address space offset. - * @acc_size: Accounted size for this object. - * @kref: Reference count of this buffer object. When this refcount reaches - * zero, the object is put on the delayed delete list. - * @list_kref: List reference count of this buffer object. This member is - * used to avoid destruction while the buffer object is still on a list. - * Lru lists may keep one refcount, the delayed delete list, and kref != 0 - * keeps one refcount. When this refcount reaches zero, - * the object is destroyed. - * @event_queue: Queue for processes waiting on buffer object status change. - * @lock: spinlock protecting mostly synchronization members. - * @mem: structure describing current placement. - * @persistant_swap_storage: Usually the swap storage is deleted for buffers - * pinned in physical memory. If this behaviour is not desired, this member - * holds a pointer to a persistant 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. - * @val_seq: Sequence of the validation holding the @reserved lock. - * Used to avoid starvation when many processes compete to validate the - * buffer. This member is protected by the bo_device::lru_lock. - * @seq_valid: The value of @val_seq is valid. This value is protected by - * the bo_device::lru_lock. - * @reserved: Deadlock-free lock used for synchronization state transitions. - * @sync_obj_arg: Opaque argument to synchronization object function. - * @sync_obj: Pointer to a synchronization object. - * @priv_flags: Flags describing buffer object internal state. - * @vm_rb: Rb node for the vm rb tree. - * @vm_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. - * - * 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 - * the driver can usually use the placement offset @offset directly as the - * GPU virtual address. For drivers implementing multiple - * GPU memory manager contexts, the driver should manage the address space - * in these contexts separately and use these objects to get the correct - * placement and caching for these GPU maps. This makes it possible to use - * these objects for even quite elaborate memory management schemes. - * The destroy member, the API visibility of this object makes it possible - * to derive driver specific types. - */ - -struct ttm_buffer_object { - /** - * Members constant at init. - */ - - struct ttm_bo_global *glob; - struct ttm_bo_device *bdev; - unsigned long buffer_start; - enum ttm_bo_type type; - void (*destroy) (struct ttm_buffer_object *); - unsigned long num_pages; - uint64_t addr_space_offset; - size_t acc_size; - - /** - * Members not needing protection. - */ - - struct kref kref; - struct kref list_kref; -// wait_queue_head_t event_queue; - spinlock_t lock; - - /** - * Members protected by the bo::reserved lock. - */ - - struct ttm_mem_reg mem; -// struct file *persistant_swap_storage; - struct ttm_tt *ttm; - bool evicted; - - /** - * Members protected by the bo::reserved lock only when written to. - */ - - atomic_t cpu_writers; - - /** - * Members protected by the bdev::lru_lock. - */ - - struct list_head lru; - struct list_head ddestroy; - struct list_head swap; - uint32_t val_seq; - bool seq_valid; - - /** - * Members protected by the bdev::lru_lock - * only when written to. - */ - - atomic_t reserved; - - - /** - * Members protected by the bo::lock - */ - - void *sync_obj_arg; - void *sync_obj; - unsigned long priv_flags; - - /** - * Members protected by the bdev::vm_lock - */ - -// struct rb_node vm_rb; - struct drm_mm_node *vm_node; - - - /** - * Special members that are protected by the reserve lock - * and the bo::lock when written to. Can be read with - * either of these locks held. - */ - - unsigned long offset; - uint32_t cur_placement; -}; - -/** - * struct ttm_bo_kmap_obj - * - * @virtual: The current kernel virtual address. - * @page: The page when kmap'ing a single page. - * @bo_kmap_type: Type of bo_kmap. - * - * Object describing a kernel mapping. Since a TTM bo may be located - * in various memory types with various caching policies, the - * mapping can either be an ioremap, a vmap, a kmap or part of a - * premapped region. - */ - -#define TTM_BO_MAP_IOMEM_MASK 0x80 -struct ttm_bo_kmap_obj { - void *virtual; - struct page *page; - enum { - ttm_bo_map_iomap = 1 | TTM_BO_MAP_IOMEM_MASK, - ttm_bo_map_vmap = 2, - ttm_bo_map_kmap = 3, - ttm_bo_map_premapped = 4 | TTM_BO_MAP_IOMEM_MASK, - } bo_kmap_type; -}; - -/** - * ttm_bo_reference - reference a struct ttm_buffer_object - * - * @bo: The buffer object. - * - * Returns a refcounted pointer to a buffer object. - */ - -static inline struct ttm_buffer_object * -ttm_bo_reference(struct ttm_buffer_object *bo) -{ - kref_get(&bo->kref); - return bo; -} - -/** - * ttm_bo_wait - wait for buffer idle. - * - * @bo: The buffer object. - * @interruptible: Use interruptible wait. - * @no_wait: Return immediately if buffer is busy. - * - * This function must be called with the bo::mutex held, and makes - * sure any previous rendering to the buffer is completed. - * Note: It might be necessary to block validations before the - * wait by reserving the buffer. - * Returns -EBUSY if no_wait is true and the buffer is busy. - * Returns -ERESTARTSYS if interrupted by a signal. - */ -extern int ttm_bo_wait(struct ttm_buffer_object *bo, bool lazy, - bool interruptible, bool no_wait); -/** - * ttm_bo_validate - * - * @bo: The buffer object. - * @placement: Proposed placement for the buffer object. - * @interruptible: Sleep interruptible if sleeping. - * @no_wait_reserve: Return immediately if other buffers are busy. - * @no_wait_gpu: Return immediately if the GPU is busy. - * - * Changes placement and caching policy of the buffer object - * according proposed placement. - * Returns - * -EINVAL on invalid proposed placement. - * -ENOMEM on out-of-memory condition. - * -EBUSY if no_wait is true and buffer busy. - * -ERESTARTSYS if interrupted by a signal. - */ -extern int ttm_bo_validate(struct ttm_buffer_object *bo, - struct ttm_placement *placement, - bool interruptible, bool no_wait_reserve, - bool no_wait_gpu); - -/** - * ttm_bo_unref - * - * @bo: The buffer object. - * - * Unreference and clear a pointer to a buffer object. - */ -extern void ttm_bo_unref(struct ttm_buffer_object **bo); - -/** - * 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 - * blocking command submission that affects the buffer and - * waiting for buffer idle. This lock is recursive. - * Returns - * -EBUSY if the buffer is busy and no_wait is true. - * -ERESTARTSYS if interrupted by a signal. - */ - -extern 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. - */ -extern void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo); - -/** - * ttm_bo_init - * - * @bdev: Pointer to a ttm_bo_device struct. - * @bo: Pointer to a ttm_buffer_object to be initialized. - * @size: Requested size of buffer object. - * @type: Requested type of buffer object. - * @flags: Initial placement flags. - * @page_alignment: Data alignment in pages. - * @buffer_start: Virtual address of user space data backing a - * user buffer object. - * @interruptible: If needing to sleep to wait for GPU resources, - * sleep interruptible. - * @persistent_swap_storage: Usually the swap storage is deleted for buffers - * pinned in physical memory. If this behaviour is not desired, this member - * holds a pointer to a persistent shmem object. Typically, this would - * 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. - * @destroy: Destroy function. Use NULL for kfree(). - * - * This function initializes a pre-allocated struct ttm_buffer_object. - * As this object may be part of a larger structure, this function, - * together with the @destroy function, - * enables driver-specific objects derived from a ttm_buffer_object. - * On successful return, the object kref and list_kref are set to 1. - * If a failure occurs, the function will call the @destroy function, or - * kfree() if @destroy is NULL. Thus, after a failure, dereferencing @bo is - * illegal and will likely cause memory corruption. - * - * Returns - * -ENOMEM: Out of memory. - * -EINVAL: Invalid placement flags. - * -ERESTARTSYS: Interrupted by signal while sleeping waiting for resources. - */ - -extern 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, - unsigned long buffer_start, - bool interrubtible, - struct file *persistent_swap_storage, - size_t acc_size, - void (*destroy) (struct ttm_buffer_object *)); -/** - * ttm_bo_synccpu_object_init - * - * @bdev: Pointer to a ttm_bo_device struct. - * @bo: Pointer to a ttm_buffer_object to be initialized. - * @size: Requested size of buffer object. - * @type: Requested type of buffer object. - * @flags: Initial placement flags. - * @page_alignment: Data alignment in pages. - * @buffer_start: Virtual address of user space data backing a - * user buffer object. - * @interruptible: If needing to sleep while waiting for GPU resources, - * sleep interruptible. - * @persistent_swap_storage: Usually the swap storage is deleted for buffers - * pinned in physical memory. If this behaviour is not desired, this member - * holds a pointer to a persistent shmem object. Typically, this would - * point to the shmem object backing a GEM object if TTM is used to back a - * GEM user interface. - * @p_bo: On successful completion *p_bo points to the created object. - * - * This function allocates a ttm_buffer_object, and then calls ttm_bo_init - * on that object. The destroy function is set to kfree(). - * Returns - * -ENOMEM: Out of memory. - * -EINVAL: Invalid placement flags. - * -ERESTARTSYS: Interrupted by signal while waiting for resources. - */ - -extern int ttm_bo_create(struct ttm_bo_device *bdev, - unsigned long size, - enum ttm_bo_type type, - struct ttm_placement *placement, - uint32_t page_alignment, - unsigned long buffer_start, - bool interruptible, - struct file *persistent_swap_storage, - struct ttm_buffer_object **p_bo); - -/** - * ttm_bo_check_placement - * - * @bo: the buffer object. - * @placement: placements - * - * Performs minimal validity checking on an intended change of - * placement flags. - * Returns - * -EINVAL: Intended change is invalid or not allowed. - */ -extern int ttm_bo_check_placement(struct ttm_buffer_object *bo, - struct ttm_placement *placement); - -/** - * ttm_bo_init_mm - * - * @bdev: Pointer to a ttm_bo_device struct. - * @mem_type: The memory type. - * @p_size: size managed area in pages. - * - * Initialize a manager for a given memory type. - * Note: if part of driver firstopen, it must be protected from a - * potentially racing lastclose. - * Returns: - * -EINVAL: invalid size or memory type. - * -ENOMEM: Not enough memory. - * May also return driver-specified errors. - */ - -extern int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type, - unsigned long p_size); -/** - * ttm_bo_clean_mm - * - * @bdev: Pointer to a ttm_bo_device struct. - * @mem_type: The memory type. - * - * Take down a manager for a given memory type after first walking - * the LRU list to evict any buffers left alive. - * - * Normally, this function is part of lastclose() or unload(), and at that - * point there shouldn't be any buffers left created by user-space, since - * there should've been removed by the file descriptor release() method. - * However, before this function is run, make sure to signal all sync objects, - * and verify that the delayed delete queue is empty. The driver must also - * make sure that there are no NO_EVICT buffers present in this memory type - * when the call is made. - * - * If this function is part of a VT switch, the caller must make sure that - * there are no appications currently validating buffers before this - * function is called. The caller can do that by first taking the - * struct ttm_bo_device::ttm_lock in write mode. - * - * Returns: - * -EINVAL: invalid or uninitialized memory type. - * -EBUSY: There are still buffers left in this memory type. - */ - -extern int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type); - -/** - * ttm_bo_evict_mm - * - * @bdev: Pointer to a ttm_bo_device struct. - * @mem_type: The memory type. - * - * Evicts all buffers on the lru list of the memory type. - * This is normally part of a VT switch or an - * out-of-memory-space-due-to-fragmentation handler. - * The caller must make sure that there are no other processes - * currently validating buffers, and can do that by taking the - * struct ttm_bo_device::ttm_lock in write mode. - * - * Returns: - * -EINVAL: Invalid or uninitialized memory type. - * -ERESTARTSYS: The call was interrupted by a signal while waiting to - * evict a buffer. - */ - -extern int ttm_bo_evict_mm(struct ttm_bo_device *bdev, unsigned mem_type); - -/** - * ttm_kmap_obj_virtual - * - * @map: A struct ttm_bo_kmap_obj returned from ttm_bo_kmap. - * @is_iomem: Pointer to an integer that on return indicates 1 if the - * virtual map is io memory, 0 if normal memory. - * - * Returns the virtual address of a buffer object area mapped by ttm_bo_kmap. - * If *is_iomem is 1 on return, the virtual address points to an io memory area, - * that should strictly be accessed by the iowriteXX() and similar functions. - */ - -static inline void *ttm_kmap_obj_virtual(struct ttm_bo_kmap_obj *map, - bool *is_iomem) -{ - *is_iomem = !!(map->bo_kmap_type & TTM_BO_MAP_IOMEM_MASK); - return map->virtual; -} - -/** - * ttm_bo_kmap - * - * @bo: The buffer object. - * @start_page: The first page to map. - * @num_pages: Number of pages to map. - * @map: pointer to a struct ttm_bo_kmap_obj representing the map. - * - * Sets up a kernel virtual mapping, using ioremap, vmap or kmap to the - * data in the buffer object. The ttm_kmap_obj_virtual function can then be - * used to obtain a virtual address to the data. - * - * Returns - * -ENOMEM: Out of memory. - * -EINVAL: Invalid range. - */ - -extern int ttm_bo_kmap(struct ttm_buffer_object *bo, unsigned long start_page, - unsigned long num_pages, struct ttm_bo_kmap_obj *map); - -/** - * ttm_bo_kunmap - * - * @map: Object describing the map to unmap. - * - * Unmaps a kernel map set up by ttm_bo_kmap. - */ - -extern void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map); - -#if 0 -#endif - -/** - * ttm_fbdev_mmap - mmap fbdev 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. - * - * This function is intended to be called by the fbdev mmap method - * if the fbdev address space is to be backed by a bo. - */ - -extern int ttm_fbdev_mmap(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_bo_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. - */ - -extern int ttm_bo_mmap(struct file *filp, struct vm_area_struct *vma, - struct ttm_bo_device *bdev); - -/** - * ttm_bo_io - * - * @bdev: Pointer to the struct ttm_bo_device. - * @filp: Pointer to the struct file attempting to read / write. - * @wbuf: User-space pointer to address of buffer to write. NULL on read. - * @rbuf: User-space pointer to address of buffer to read into. - * Null on write. - * @count: Number of bytes to read / write. - * @f_pos: Pointer to current file position. - * @write: 1 for read, 0 for write. - * - * This function implements read / write into ttm buffer objects, and is - * intended to - * be called from the fops::read and fops::write method. - * Returns: - * See man (2) write, man(2) read. In particular, - * the function may return -ERESTARTSYS if - * interrupted by a signal. - */ - -extern ssize_t ttm_bo_io(struct ttm_bo_device *bdev, struct file *filp, - const char __user *wbuf, char __user *rbuf, - size_t count, loff_t *f_pos, bool write); - -extern void ttm_bo_swapout_all(struct ttm_bo_device *bdev); - -#endif +/************************************************************************** + * + * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA + * All Rights Reserved. + * + * 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, sub license, 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 (including the + * next paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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: Thomas Hellstrom + */ + +#ifndef _TTM_BO_API_H_ +#define _TTM_BO_API_H_ + +#include +#include +#include +#include +#include +#include +#include +#include + +struct ttm_bo_device; + +struct drm_mm_node; + + +/** + * struct ttm_placement + * + * @fpfn: first valid page frame number to put the object + * @lpfn: last valid page frame number to put the object + * @num_placement: number of preferred placements + * @placement: preferred placements + * @num_busy_placement: number of preferred placements when need to evict buffer + * @busy_placement: preferred placements when need to evict buffer + * + * Structure indicating the placement you request for an object. + */ +struct ttm_placement { + unsigned fpfn; + unsigned lpfn; + unsigned num_placement; + const uint32_t *placement; + unsigned num_busy_placement; + const uint32_t *busy_placement; +}; + +/** + * struct ttm_bus_placement + * + * @addr: mapped virtual address + * @base: bus base address + * @is_iomem: is this io memory ? + * @size: size in byte + * @offset: offset from the base address + * @io_reserved_vm: The VM system has a refcount in @io_reserved_count + * @io_reserved_count: Refcounting the numbers of callers to ttm_mem_io_reserve + * + * Structure indicating the bus placement of an object. + */ +struct ttm_bus_placement { + void *addr; + unsigned long base; + unsigned long size; + unsigned long offset; + bool is_iomem; + bool io_reserved_vm; + uint64_t io_reserved_count; +}; + + +/** + * struct ttm_mem_reg + * + * @mm_node: Memory manager node. + * @size: Requested size of memory region. + * @num_pages: Actual size of memory region in pages. + * @page_alignment: Page alignment. + * @placement: Placement flags. + * @bus: Placement on io bus accessible to the CPU + * + * Structure indicating the placement and space resources used by a + * buffer object. + */ + +struct ttm_mem_reg { + void *mm_node; + unsigned long start; + unsigned long size; + unsigned long num_pages; + uint32_t page_alignment; + uint32_t mem_type; + uint32_t placement; + struct ttm_bus_placement bus; +}; + +/** + * enum ttm_bo_type + * + * @ttm_bo_type_device: These are 'normal' buffers that can + * be mmapped by user space. Each of these bos occupy a slot in the + * device address space, that can be used for normal vm operations. + * + * @ttm_bo_type_kernel: These buffers are like ttm_bo_type_device buffers, + * but they cannot be accessed from user-space. For kernel-only use. + * + * @ttm_bo_type_sg: Buffer made from dmabuf sg table shared with another + * driver. + */ + +enum ttm_bo_type { + ttm_bo_type_device, + ttm_bo_type_kernel, + ttm_bo_type_sg +}; + +struct ttm_tt; + +/** + * struct ttm_buffer_object + * + * @bdev: Pointer to the buffer object device structure. + * @type: The bo type. + * @destroy: Destruction function. If NULL, kfree is used. + * @num_pages: Actual number of pages. + * @addr_space_offset: Address space offset. + * @acc_size: Accounted size for this object. + * @kref: Reference count of this buffer object. When this refcount reaches + * zero, the object is put on the delayed delete list. + * @list_kref: List reference count of this buffer object. This member is + * used to avoid destruction while the buffer object is still on a list. + * Lru lists may keep one refcount, the delayed delete list, and kref != 0 + * keeps one refcount. When this refcount reaches zero, + * the object is destroyed. + * @event_queue: Queue for processes waiting on buffer object status change. + * @mem: structure describing current placement. + * @persistent_swap_storage: Usually the swap storage is deleted for buffers + * pinned in physical memory. If this behaviour is not desired, this member + * 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. + * @val_seq: Sequence of the validation holding the @reserved lock. + * Used to avoid starvation when many processes compete to validate the + * buffer. This member is protected by the bo_device::lru_lock. + * @seq_valid: The value of @val_seq is valid. This value is protected by + * the bo_device::lru_lock. + * @reserved: Deadlock-free lock used for synchronization state transitions. + * @sync_obj: Pointer to a synchronization object. + * @priv_flags: Flags describing buffer object internal state. + * @vm_rb: Rb node for the vm rb tree. + * @vm_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. + * + * 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 + * the driver can usually use the placement offset @offset directly as the + * GPU virtual address. For drivers implementing multiple + * GPU memory manager contexts, the driver should manage the address space + * in these contexts separately and use these objects to get the correct + * placement and caching for these GPU maps. This makes it possible to use + * these objects for even quite elaborate memory management schemes. + * The destroy member, the API visibility of this object makes it possible + * to derive driver specific types. + */ + +struct ttm_buffer_object { + /** + * Members constant at init. + */ + + struct ttm_bo_global *glob; + struct ttm_bo_device *bdev; + enum ttm_bo_type type; + void (*destroy) (struct ttm_buffer_object *); + unsigned long num_pages; + uint64_t addr_space_offset; + size_t acc_size; + + /** + * Members not needing protection. + */ + + struct kref kref; + struct kref list_kref; + wait_queue_head_t event_queue; + + /** + * Members protected by the bo::reserved lock. + */ + + struct ttm_mem_reg mem; + struct file *persistent_swap_storage; + struct ttm_tt *ttm; + bool evicted; + + /** + * Members protected by the bo::reserved lock only when written to. + */ + + atomic_t cpu_writers; + + /** + * Members protected by the bdev::lru_lock. + */ + + struct list_head lru; + struct list_head ddestroy; + struct list_head swap; + struct list_head io_reserve_lru; + uint32_t val_seq; + bool seq_valid; + + /** + * Members protected by the bdev::lru_lock + * only when written to. + */ + + atomic_t reserved; + + /** + * Members protected by struct buffer_object_device::fence_lock + * In addition, setting sync_obj to anything else + * than NULL requires bo::reserved to be held. This allows for + * checking NULL while reserved but not holding the mentioned lock. + */ + + void *sync_obj; + unsigned long priv_flags; + + /** + * Members protected by the bdev::vm_lock + */ + +// struct rb_node vm_rb; + struct drm_mm_node *vm_node; + + + /** + * Special members that are protected by the reserve lock + * and the bo::lock when written to. Can be read with + * either of these locks held. + */ + + unsigned long offset; + uint32_t cur_placement; + + struct sg_table *sg; +}; + +/** + * struct ttm_bo_kmap_obj + * + * @virtual: The current kernel virtual address. + * @page: The page when kmap'ing a single page. + * @bo_kmap_type: Type of bo_kmap. + * + * Object describing a kernel mapping. Since a TTM bo may be located + * in various memory types with various caching policies, the + * mapping can either be an ioremap, a vmap, a kmap or part of a + * premapped region. + */ + +#define TTM_BO_MAP_IOMEM_MASK 0x80 +struct ttm_bo_kmap_obj { + void *virtual; + struct page *page; + enum { + ttm_bo_map_iomap = 1 | TTM_BO_MAP_IOMEM_MASK, + ttm_bo_map_vmap = 2, + ttm_bo_map_kmap = 3, + ttm_bo_map_premapped = 4 | TTM_BO_MAP_IOMEM_MASK, + } bo_kmap_type; + struct ttm_buffer_object *bo; +}; + +/** + * ttm_bo_reference - reference a struct ttm_buffer_object + * + * @bo: The buffer object. + * + * Returns a refcounted pointer to a buffer object. + */ + +static inline struct ttm_buffer_object * +ttm_bo_reference(struct ttm_buffer_object *bo) +{ + kref_get(&bo->kref); + return bo; +} + +/** + * ttm_bo_wait - wait for buffer idle. + * + * @bo: The buffer object. + * @interruptible: Use interruptible wait. + * @no_wait: Return immediately if buffer is busy. + * + * This function must be called with the bo::mutex held, and makes + * sure any previous rendering to the buffer is completed. + * Note: It might be necessary to block validations before the + * wait by reserving the buffer. + * Returns -EBUSY if no_wait is true and the buffer is busy. + * Returns -ERESTARTSYS if interrupted by a signal. + */ +extern int ttm_bo_wait(struct ttm_buffer_object *bo, bool lazy, + bool interruptible, bool no_wait); +/** + * ttm_bo_validate + * + * @bo: The buffer object. + * @placement: Proposed placement for the buffer object. + * @interruptible: Sleep interruptible if sleeping. + * @no_wait_gpu: Return immediately if the GPU is busy. + * + * Changes placement and caching policy of the buffer object + * according proposed placement. + * Returns + * -EINVAL on invalid proposed placement. + * -ENOMEM on out-of-memory condition. + * -EBUSY if no_wait is true and buffer busy. + * -ERESTARTSYS if interrupted by a signal. + */ +extern int ttm_bo_validate(struct ttm_buffer_object *bo, + struct ttm_placement *placement, + bool interruptible, + bool no_wait_gpu); + +/** + * ttm_bo_unref + * + * @bo: The buffer object. + * + * Unreference and clear a pointer to a buffer object. + */ +extern void ttm_bo_unref(struct ttm_buffer_object **bo); + + +/** + * ttm_bo_list_ref_sub + * + * @bo: The buffer object. + * @count: The number of references with which to decrease @bo::list_kref; + * @never_free: The refcount should not reach zero with this operation. + * + * Release @count lru list references to this buffer object. + */ +extern void ttm_bo_list_ref_sub(struct ttm_buffer_object *bo, int count, + bool never_free); + +/** + * 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. + */ +extern 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. + */ +extern int ttm_bo_del_from_lru(struct ttm_buffer_object *bo); + + +/** + * ttm_bo_lock_delayed_workqueue + * + * Prevent the delayed workqueue from running. + * Returns + * True if the workqueue was queued at the time + */ +extern int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device *bdev); + +/** + * ttm_bo_unlock_delayed_workqueue + * + * Allows the delayed workqueue to run. + */ +extern void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device *bdev, + int resched); + +/** + * 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. + */ +extern 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. + */ +extern void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo); + +/** + * ttm_bo_acc_size + * + * @bdev: Pointer to a ttm_bo_device struct. + * @bo_size: size of the buffer object in byte. + * @struct_size: size of the structure holding buffer object datas + * + * Returns size to account for a buffer object + */ +size_t ttm_bo_acc_size(struct ttm_bo_device *bdev, + unsigned long bo_size, + unsigned struct_size); +size_t ttm_bo_dma_acc_size(struct ttm_bo_device *bdev, + unsigned long bo_size, + unsigned struct_size); + +/** + * ttm_bo_init + * + * @bdev: Pointer to a ttm_bo_device struct. + * @bo: Pointer to a ttm_buffer_object to be initialized. + * @size: Requested size of buffer object. + * @type: Requested type of buffer object. + * @flags: Initial placement flags. + * @page_alignment: Data alignment in pages. + * @interruptible: If needing to sleep to wait for GPU resources, + * sleep interruptible. + * @persistent_swap_storage: Usually the swap storage is deleted for buffers + * pinned in physical memory. If this behaviour is not desired, this member + * holds a pointer to a persistent shmem object. Typically, this would + * 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. + * @destroy: Destroy function. Use NULL for kfree(). + * + * This function initializes a pre-allocated struct ttm_buffer_object. + * As this object may be part of a larger structure, this function, + * together with the @destroy function, + * enables driver-specific objects derived from a ttm_buffer_object. + * On successful return, the object kref and list_kref are set to 1. + * If a failure occurs, the function will call the @destroy function, or + * kfree() if @destroy is NULL. Thus, after a failure, dereferencing @bo is + * illegal and will likely cause memory corruption. + * + * Returns + * -ENOMEM: Out of memory. + * -EINVAL: Invalid placement flags. + * -ERESTARTSYS: Interrupted by signal while sleeping waiting for resources. + */ + +extern 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, + struct file *persistent_swap_storage, + size_t acc_size, + struct sg_table *sg, + void (*destroy) (struct ttm_buffer_object *)); + +/** + * ttm_bo_synccpu_object_init + * + * @bdev: Pointer to a ttm_bo_device struct. + * @bo: Pointer to a ttm_buffer_object to be initialized. + * @size: Requested size of buffer object. + * @type: Requested type of buffer object. + * @flags: Initial placement flags. + * @page_alignment: Data alignment in pages. + * @interruptible: If needing to sleep while waiting for GPU resources, + * sleep interruptible. + * @persistent_swap_storage: Usually the swap storage is deleted for buffers + * pinned in physical memory. If this behaviour is not desired, this member + * holds a pointer to a persistent shmem object. Typically, this would + * point to the shmem object backing a GEM object if TTM is used to back a + * GEM user interface. + * @p_bo: On successful completion *p_bo points to the created object. + * + * This function allocates a ttm_buffer_object, and then calls ttm_bo_init + * on that object. The destroy function is set to kfree(). + * Returns + * -ENOMEM: Out of memory. + * -EINVAL: Invalid placement flags. + * -ERESTARTSYS: Interrupted by signal while waiting for resources. + */ + +extern int ttm_bo_create(struct ttm_bo_device *bdev, + unsigned long size, + enum ttm_bo_type type, + struct ttm_placement *placement, + uint32_t page_alignment, + bool interruptible, + struct file *persistent_swap_storage, + struct ttm_buffer_object **p_bo); + +/** + * ttm_bo_check_placement + * + * @bo: the buffer object. + * @placement: placements + * + * Performs minimal validity checking on an intended change of + * placement flags. + * Returns + * -EINVAL: Intended change is invalid or not allowed. + */ +extern int ttm_bo_check_placement(struct ttm_buffer_object *bo, + struct ttm_placement *placement); + +/** + * ttm_bo_init_mm + * + * @bdev: Pointer to a ttm_bo_device struct. + * @mem_type: The memory type. + * @p_size: size managed area in pages. + * + * Initialize a manager for a given memory type. + * Note: if part of driver firstopen, it must be protected from a + * potentially racing lastclose. + * Returns: + * -EINVAL: invalid size or memory type. + * -ENOMEM: Not enough memory. + * May also return driver-specified errors. + */ + +extern int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type, + unsigned long p_size); +/** + * ttm_bo_clean_mm + * + * @bdev: Pointer to a ttm_bo_device struct. + * @mem_type: The memory type. + * + * Take down a manager for a given memory type after first walking + * the LRU list to evict any buffers left alive. + * + * Normally, this function is part of lastclose() or unload(), and at that + * point there shouldn't be any buffers left created by user-space, since + * there should've been removed by the file descriptor release() method. + * However, before this function is run, make sure to signal all sync objects, + * and verify that the delayed delete queue is empty. The driver must also + * make sure that there are no NO_EVICT buffers present in this memory type + * when the call is made. + * + * If this function is part of a VT switch, the caller must make sure that + * there are no appications currently validating buffers before this + * function is called. The caller can do that by first taking the + * struct ttm_bo_device::ttm_lock in write mode. + * + * Returns: + * -EINVAL: invalid or uninitialized memory type. + * -EBUSY: There are still buffers left in this memory type. + */ + +extern int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type); + +/** + * ttm_bo_evict_mm + * + * @bdev: Pointer to a ttm_bo_device struct. + * @mem_type: The memory type. + * + * Evicts all buffers on the lru list of the memory type. + * This is normally part of a VT switch or an + * out-of-memory-space-due-to-fragmentation handler. + * The caller must make sure that there are no other processes + * currently validating buffers, and can do that by taking the + * struct ttm_bo_device::ttm_lock in write mode. + * + * Returns: + * -EINVAL: Invalid or uninitialized memory type. + * -ERESTARTSYS: The call was interrupted by a signal while waiting to + * evict a buffer. + */ + +extern int ttm_bo_evict_mm(struct ttm_bo_device *bdev, unsigned mem_type); + +/** + * ttm_kmap_obj_virtual + * + * @map: A struct ttm_bo_kmap_obj returned from ttm_bo_kmap. + * @is_iomem: Pointer to an integer that on return indicates 1 if the + * virtual map is io memory, 0 if normal memory. + * + * Returns the virtual address of a buffer object area mapped by ttm_bo_kmap. + * If *is_iomem is 1 on return, the virtual address points to an io memory area, + * that should strictly be accessed by the iowriteXX() and similar functions. + */ + +static inline void *ttm_kmap_obj_virtual(struct ttm_bo_kmap_obj *map, + bool *is_iomem) +{ + *is_iomem = !!(map->bo_kmap_type & TTM_BO_MAP_IOMEM_MASK); + return map->virtual; +} + +/** + * ttm_bo_kmap + * + * @bo: The buffer object. + * @start_page: The first page to map. + * @num_pages: Number of pages to map. + * @map: pointer to a struct ttm_bo_kmap_obj representing the map. + * + * Sets up a kernel virtual mapping, using ioremap, vmap or kmap to the + * data in the buffer object. The ttm_kmap_obj_virtual function can then be + * used to obtain a virtual address to the data. + * + * Returns + * -ENOMEM: Out of memory. + * -EINVAL: Invalid range. + */ + +extern int ttm_bo_kmap(struct ttm_buffer_object *bo, unsigned long start_page, + unsigned long num_pages, struct ttm_bo_kmap_obj *map); + +/** + * ttm_bo_kunmap + * + * @map: Object describing the map to unmap. + * + * Unmaps a kernel map set up by ttm_bo_kmap. + */ + +extern void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map); + +/** + * ttm_fbdev_mmap - mmap fbdev 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. + * + * This function is intended to be called by the fbdev mmap method + * if the fbdev address space is to be backed by a bo. + */ + +extern int ttm_fbdev_mmap(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_bo_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. + */ + +extern int ttm_bo_mmap(struct file *filp, struct vm_area_struct *vma, + struct ttm_bo_device *bdev); + +/** + * ttm_bo_io + * + * @bdev: Pointer to the struct ttm_bo_device. + * @filp: Pointer to the struct file attempting to read / write. + * @wbuf: User-space pointer to address of buffer to write. NULL on read. + * @rbuf: User-space pointer to address of buffer to read into. + * Null on write. + * @count: Number of bytes to read / write. + * @f_pos: Pointer to current file position. + * @write: 1 for read, 0 for write. + * + * This function implements read / write into ttm buffer objects, and is + * intended to + * be called from the fops::read and fops::write method. + * Returns: + * See man (2) write, man(2) read. In particular, + * the function may return -ERESTARTSYS if + * interrupted by a signal. + */ + +extern ssize_t ttm_bo_io(struct ttm_bo_device *bdev, struct file *filp, + const char __user *wbuf, char __user *rbuf, + size_t count, loff_t *f_pos, bool write); + +extern void ttm_bo_swapout_all(struct ttm_bo_device *bdev); + +/** + * ttm_bo_is_reserved - return an indication if a ttm buffer object is reserved + * + * @bo: The buffer object to check. + * + * This function returns an indication if a bo is reserved or not, and should + * only be used to print an error when it is not from incorrect api usage, since + * there's no guarantee that it is the caller that is holding the reservation. + */ +static inline bool ttm_bo_is_reserved(struct ttm_buffer_object *bo) +{ + return atomic_read(&bo->reserved); +} + +#endif diff --git a/drivers/include/drm/ttm/ttm_bo_driver.h b/drivers/include/drm/ttm/ttm_bo_driver.h index 0972697d98..805bf5f3a2 100644 --- a/drivers/include/drm/ttm/ttm_bo_driver.h +++ b/drivers/include/drm/ttm/ttm_bo_driver.h @@ -1,929 +1,1011 @@ -/************************************************************************** - * - * Copyright (c) 2006-2009 Vmware, Inc., Palo Alto, CA., USA - * All Rights Reserved. - * - * 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, sub license, 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 (including the - * next paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL - * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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: Thomas Hellstrom - */ -#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" - -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. - * @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. - */ - int (*bind) (struct ttm_backend *backend, struct ttm_mem_reg *bo_mem); - - /** - * struct ttm_backend_func member unbind - * - * @backend: Pointer to a struct ttm_backend. - * - * Unbind previously bound backend pages. This function should be - * able to handle differences between aperture- and system page sizes. - */ - int (*unbind) (struct ttm_backend *backend); - - /** - * struct ttm_backend_func member destroy - * - * @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 { - 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) - -enum ttm_caching_state { - tt_uncached, - tt_wc, - tt_cached -}; - -/** - * 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. - * @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) - * memory. - */ - -struct ttm_tt { - 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 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 { - tt_bound, - tt_unbound, - tt_unpopulated, - } state; - dma_addr_t *dma_address; -}; - -#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 - * - * @has_type: The memory type has been initialized. - * @use_type: The memory type is enabled. - * @flags: TTM_MEMTYPE_XX flags identifying the traits of the memory - * managed by this memory type. - * @gpu_offset: If used, the GPU offset of the first managed page of - * fixed memory or the first managed location in an aperture. - * @size: Size of the managed region. - * @available_caching: A mask of available caching types, TTM_PL_FLAG_XX, - * as defined in ttm_placement_common.h - * @default_caching: The default caching policy used for a buffer object - * placed in this memory type if the user doesn't provide one. - * @func: structure pointer implementing the range manager. See above - * @priv: Driver private closure for @func. - * @io_reserve_mutex: Mutex optionally protecting shared io_reserve structures - * @use_io_reserve_lru: Use an lru list to try to unreserve io_mem_regions - * reserved by the TTM vm system. - * @io_reserve_lru: Optional lru list for unreserving io mem regions. - * @io_reserve_fastpath: Only use bdev::driver::io_mem_reserve to obtain - * static information. bdev::driver::io_mem_free is never used. - * @lru: The lru list for this memory type. - * - * This structure is used to identify and manage memory types for a device. - * It's set up by the ttm_bo_driver::init_mem_type method. - */ - - - -struct ttm_mem_type_manager { - struct ttm_bo_device *bdev; - - /* - * No protection. Constant from start. - */ - - bool has_type; - bool use_type; - uint32_t flags; - unsigned long gpu_offset; - uint64_t size; - uint32_t available_caching; - uint32_t default_caching; - const struct ttm_mem_type_manager_func *func; - void *priv; - struct mutex io_reserve_mutex; - bool use_io_reserve_lru; - bool io_reserve_fastpath; - - /* - * Protected by @io_reserve_mutex: - */ - - struct list_head io_reserve_lru; - - /* - * Protected by the global->lru_lock. - */ - - struct list_head lru; -}; - -/** - * struct ttm_bo_driver - * - * @create_ttm_backend_entry: Callback to create a struct ttm_backend. - * @invalidate_caches: Callback to invalidate read caches when a buffer object - * has been evicted. - * @init_mem_type: Callback to initialize a struct ttm_mem_type_manager - * structure. - * @evict_flags: Callback to obtain placement flags when a buffer is evicted. - * @move: Callback for a driver to hook in accelerated functions to - * move a buffer. - * If set to NULL, a potentially slow memcpy() move is used. - * @sync_obj_signaled: See ttm_fence_api.h - * @sync_obj_wait: See ttm_fence_api.h - * @sync_obj_flush: See ttm_fence_api.h - * @sync_obj_unref: See ttm_fence_api.h - * @sync_obj_ref: See ttm_fence_api.h - */ - -struct ttm_bo_driver { - /** - * struct ttm_bo_driver member create_ttm_backend_entry - * - * @bdev: The buffer object device. - * - * Create a driver specific struct ttm_backend. - */ - - struct ttm_backend *(*create_ttm_backend_entry) - (struct ttm_bo_device *bdev); - - /** - * struct ttm_bo_driver member invalidate_caches - * - * @bdev: the buffer object device. - * @flags: new placement of the rebound buffer object. - * - * A previosly evicted buffer has been rebound in a - * potentially new location. Tell the driver that it might - * consider invalidating read (texture) caches on the next command - * submission as a consequence. - */ - - int (*invalidate_caches) (struct ttm_bo_device *bdev, uint32_t flags); - int (*init_mem_type) (struct ttm_bo_device *bdev, uint32_t type, - struct ttm_mem_type_manager *man); - /** - * struct ttm_bo_driver member evict_flags: - * - * @bo: the buffer object to be evicted - * - * Return the bo flags for a buffer which is not mapped to the hardware. - * These will be placed in proposed_flags so that when the move is - * finished, they'll end up in bo->mem.flags - */ - - void(*evict_flags) (struct ttm_buffer_object *bo, - struct ttm_placement *placement); - /** - * struct ttm_bo_driver member move: - * - * @bo: the buffer to move - * @evict: whether this motion is evicting the buffer from - * the graphics address space - * @interruptible: Use interruptible sleeps if possible when sleeping. - * @no_wait: whether this should give up and return -EBUSY - * if this move would require sleeping - * @new_mem: the new memory region receiving the buffer - * - * Move a buffer between two memory regions. - */ - int (*move) (struct ttm_buffer_object *bo, - bool evict, bool interruptible, - bool no_wait, struct ttm_mem_reg *new_mem); - - /** - * 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); - - /** - * In case a driver writer dislikes the TTM fence objects, - * the driver writer can replace those with sync objects of - * his / her own. If it turns out that no driver writer is - * using these. I suggest we remove these hooks and plug in - * 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); - int (*sync_obj_wait) (void *sync_obj, void *sync_arg, - bool lazy, bool interruptible); - int (*sync_obj_flush) (void *sync_obj, void *sync_arg); - 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 */ - void (*fault_reserve_notify)(struct ttm_buffer_object *bo); -}; - -/** - * struct ttm_bo_global_ref - Argument to initialize a struct ttm_bo_global. - */ - -struct ttm_bo_global_ref { - struct ttm_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. - * @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. - * @device_list: List of buffer object devices. - * @swap_lru: Lru list of buffer objects used for swapping. - */ - -struct ttm_bo_global { - - /** - * Constant after init. - */ - -// 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 mutex device_list_mutex; - spinlock_t lru_lock; - - /** - * Protected by device_list_mutex. - */ - struct list_head device_list; - - /** - * Protected by the lru_lock. - */ - struct list_head swap_lru; - - /** - * Internal protection. - */ - atomic_t bo_count; -}; - - -#define TTM_NUM_MEM_TYPES 8 - -#define TTM_BO_PRIV_FLAG_MOVING 0 /* Buffer object is moving and needs - idling before CPU mapping */ -#define TTM_BO_PRIV_FLAG_MAX 1 -/** - * 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. - * @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. - * @dev_mapping: A pointer to the struct address_space representing the - * device address space. - * @wq: Work queue structure for the delayed delete workqueue. - * - */ - -struct ttm_bo_device { - - /* - * Constant after bo device init / atomic. - */ - struct list_head device_list; - struct ttm_bo_global *glob; - struct ttm_bo_driver *driver; - rwlock_t vm_lock; - struct ttm_mem_type_manager man[TTM_NUM_MEM_TYPES]; - /* - * Protected by the vm lock. - */ -// struct rb_root addr_space_rb; - struct drm_mm addr_space_mm; - - /* - * Protected by the global:lru lock. - */ - struct list_head ddestroy; - - /* - * Protected by load / firstopen / lastclose /unload sync. - */ - - bool nice_mode; - struct address_space *dev_mapping; - - /* - * Internal protection. - */ - -// struct delayed_work wq; - - bool need_dma32; -}; - -/** - * ttm_flag_masked - * - * @old: Pointer to the result and original value. - * @new: New value of bits. - * @mask: Mask of bits to change. - * - * Convenience function to change a number of bits identified by a mask. - */ - -static inline uint32_t -ttm_flag_masked(uint32_t *old, uint32_t new, uint32_t mask) -{ - *old ^= (*old ^ new) & mask; - return *old; -} - -/** - * 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. - * @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, - unsigned long size, - uint32_t page_flags, - struct page *dummy_read_page); - -/** - * ttm_tt_set_user: - * - * @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. - * - * Populate a struct ttm_tt with a user-space memory area after first pinning - * the pages backing it. - * Returns: - * !0: Error. - */ - -extern int ttm_tt_set_user(struct ttm_tt *ttm, - struct task_struct *tsk, - unsigned long start, unsigned long num_pages); - -/** - * ttm_ttm_bind: - * - * @ttm: The struct ttm_tt containing backing pages. - * @bo_mem: The struct ttm_mem_reg identifying the binding location. - * - * 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. - */ -extern void ttm_tt_destroy(struct ttm_tt *ttm); - -/** - * ttm_ttm_unbind: - * - * @ttm: The struct ttm_tt. - * - * Unbind a struct ttm_tt. - */ -extern void ttm_tt_unbind(struct ttm_tt *ttm); - -/** - * ttm_ttm_destroy: - * - * @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. - */ -extern struct page *ttm_tt_get_page(struct ttm_tt *ttm, int index); - -/** - * ttm_tt_cache_flush: - * - * @pages: An array of pointers to struct page:s to flush. - * @num_pages: Number of pages to flush. - * - * Flush the data of the indicated pages from the cpu caches. - * This is used when changing caching attributes of the pages from - * cache-coherent. - */ -extern void ttm_tt_cache_flush(struct page *pages[], unsigned long num_pages); - -/** - * ttm_tt_set_placement_caching: - * - * @ttm A struct ttm_tt the backing pages of which will change caching policy. - * @placement: Flag indicating the desired caching policy. - * - * This function will change caching policy of any default kernel mappings of - * the pages backing @ttm. If changing from cached to uncached or - * write-combined, - * all CPU caches will first be flushed to make sure the data of the pages - * 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); - -/* - * ttm_bo.c - */ - -/** - * ttm_mem_reg_is_pci - * - * @bdev: Pointer to a struct ttm_bo_device. - * @mem: A valid struct ttm_mem_reg. - * - * Returns true if the memory described by @mem is PCI memory, - * false otherwise. - */ -extern bool ttm_mem_reg_is_pci(struct ttm_bo_device *bdev, - struct ttm_mem_reg *mem); - -/** - * ttm_bo_mem_space - * - * @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. - * - * 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: - * -EBUSY: No space available (only if no_wait == 1). - * -ENOMEM: Could not allocate memory for the buffer object, either due to - * fragmentation or concurrent allocators. - * -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); -/** - * 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. - */ - -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, - 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); - -/** - * 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. - * @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 - * address space. - * - * Initializes a struct ttm_bo_device: - * Returns: - * !0: Failure. - */ -extern int ttm_bo_device_init(struct ttm_bo_device *bdev, - struct ttm_bo_global *glob, - struct ttm_bo_driver *driver, - uint64_t file_page_offset, bool need_dma32); - -/** - * ttm_bo_unmap_virtual - * - * @bo: tear down the virtual mappings for this BO - */ -extern void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo); - -/** - * ttm_bo_reserve: - * - * @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. - * - * Locks a buffer object for validation. (Or prevents other processes from - * locking it for validation) and removes it from lru lists, while taking - * a number of measures to prevent deadlocks. - * - * 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: - * 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 - * is still the first buffer in the lru list, before it is removed from the - * list. @check_lru == 1 forces this check. If it fails, the function returns - * -EINVAL, and the caller should then choose a new buffer to evict and repeat - * the procedure. - * 2) Processes attempting to reserve multiple buffers other than for eviction, - * (typically execbuf), should first obtain a unique 32-bit - * validation sequence number, - * and call this function with @use_sequence == 1 and @sequence == the unique - * sequence number. If upon call of this function, the buffer object is already - * reserved, the validation sequence is checked against the validation - * sequence of the process currently reserving the buffer, - * and if the current validation sequence is greater than that of the process - * holding the reservation, the function returns -EAGAIN. Otherwise it sleeps - * waiting for the buffer to become unreserved, after which it retries - * reserving. - * The caller should, when receiving an -EAGAIN error - * release all its buffer reservations, wait for @bo to become unreserved, and - * then rerun the validation with the same validation sequence. This procedure - * will always guarantee that the process with the lowest validation sequence - * will eventually succeed, preventing both deadlocks and starvation. - * - * 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. - */ -extern int ttm_bo_reserve(struct ttm_buffer_object *bo, - bool interruptible, - bool no_wait, bool use_sequence, uint32_t sequence); - -/** - * ttm_bo_unreserve - * - * @bo: A pointer to a struct ttm_buffer_object. - * - * Unreserve a previous reservation of @bo. - */ -extern void ttm_bo_unreserve(struct ttm_buffer_object *bo); - -/** - * ttm_bo_wait_unreserved - * - * @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. - */ -extern int ttm_bo_wait_unreserved(struct ttm_buffer_object *bo, - bool interruptible); - -/** - * 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. - * 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. - */ -extern int ttm_bo_block_reservation(struct ttm_buffer_object *bo, - bool interruptible, bool no_wait); - -/** - * ttm_bo_unblock_reservation - * - * @bo: A pointer to a struct ttm_buffer_object. - * - * Unblocks reservation leaving lru lists untouched. - */ -extern void ttm_bo_unblock_reservation(struct ttm_buffer_object *bo); - -/* - * 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. - * @no_wait: Never sleep, but rather return with -EBUSY. - * @new_mem: struct ttm_mem_reg indicating where to move. - * - * Optimized move function for a buffer object with both old and - * new placement backed by a TTM. The function will, if successful, - * free any old aperture space, and set (@new_mem)->mm_node to NULL, - * and update the (@bo)->mem placement flags. If unsuccessful, the old - * data remains untouched, and it's up to the caller to free the - * memory space indicated by @new_mem. - * Returns: - * !0: Failure. - */ - -extern int ttm_bo_move_ttm(struct ttm_buffer_object *bo, - bool evict, bool no_wait, - 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. - * @new_mem: struct ttm_mem_reg indicating where to move. - * - * Fallback move function for a mappable buffer object in mappable memory. - * The function will, if successful, - * free any old aperture space, and set (@new_mem)->mm_node to NULL, - * and update the (@bo)->mem placement flags. If unsuccessful, the old - * data remains untouched, and it's up to the caller to free the - * memory space indicated by @new_mem. - * Returns: - * !0: Failure. - */ - -extern int ttm_bo_move_memcpy(struct ttm_buffer_object *bo, - bool evict, - bool no_wait, struct ttm_mem_reg *new_mem); - -/** - * ttm_bo_free_old_node - * - * @bo: A pointer to a struct ttm_buffer_object. - * - * Utility function to free an old placement after a successful move. - */ -extern void ttm_bo_free_old_node(struct ttm_buffer_object *bo); - -/** - * 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. - * @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 - * objects. After that the newly created buffer object is unref'd to be - * destroyed when the move is complete. This will help pipeline - * buffer moves. - */ - -extern int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo, - void *sync_obj, - void *sync_obj_arg, - bool evict, bool no_wait, - 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(enum ttm_caching_state c_state, pgprot_t tmp); - -#if (defined(CONFIG_AGP) || (defined(CONFIG_AGP_MODULE) && defined(MODULE))) -#define TTM_HAS_AGP -#include - -/** - * ttm_agp_backend_init - * - * @bdev: Pointer to a 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_backend *ttm_agp_backend_init(struct ttm_bo_device *bdev, - struct agp_bridge_data *bridge); -#endif - -#endif +/************************************************************************** + * + * Copyright (c) 2006-2009 Vmware, Inc., Palo Alto, CA., USA + * All Rights Reserved. + * + * 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, sub license, 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 (including the + * next paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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: Thomas Hellstrom + */ +#ifndef _TTM_BO_DRIVER_H_ +#define _TTM_BO_DRIVER_H_ + +#include +#include +#include +#include +#include +//#include +//#include +#include + +struct ttm_backend_func { + /** + * struct ttm_backend_func member bind + * + * @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. + */ + int (*bind) (struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem); + + /** + * struct ttm_backend_func member unbind + * + * @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. + */ + int (*unbind) (struct ttm_tt *ttm); + + /** + * struct ttm_backend_func member destroy + * + * @ttm: Pointer to a struct ttm_tt. + * + * 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_tt *ttm); +}; + +#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, + tt_wc, + tt_cached +}; + +/** + * 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. + * @num_pages: Number of pages in the page array. + * @bdev: Pointer to the current struct ttm_bo_device. + * @be: Pointer to the ttm backend. + * @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. + * + * 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_bo_device *bdev; + struct ttm_backend_func *func; + struct page *dummy_read_page; + struct page **pages; + uint32_t page_flags; + unsigned long num_pages; + 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 + * @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 */ +#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. + * @use_type: The memory type is enabled. + * @flags: TTM_MEMTYPE_XX flags identifying the traits of the memory + * managed by this memory type. + * @gpu_offset: If used, the GPU offset of the first managed page of + * fixed memory or the first managed location in an aperture. + * @size: Size of the managed region. + * @available_caching: A mask of available caching types, TTM_PL_FLAG_XX, + * as defined in ttm_placement_common.h + * @default_caching: The default caching policy used for a buffer object + * placed in this memory type if the user doesn't provide one. + * @func: structure pointer implementing the range manager. See above + * @priv: Driver private closure for @func. + * @io_reserve_mutex: Mutex optionally protecting shared io_reserve structures + * @use_io_reserve_lru: Use an lru list to try to unreserve io_mem_regions + * reserved by the TTM vm system. + * @io_reserve_lru: Optional lru list for unreserving io mem regions. + * @io_reserve_fastpath: Only use bdev::driver::io_mem_reserve to obtain + * static information. bdev::driver::io_mem_free is never used. + * @lru: The lru list for this memory type. + * + * This structure is used to identify and manage memory types for a device. + * It's set up by the ttm_bo_driver::init_mem_type method. + */ + + + +struct ttm_mem_type_manager { + struct ttm_bo_device *bdev; + + /* + * No protection. Constant from start. + */ + + bool has_type; + bool use_type; + uint32_t flags; + unsigned long gpu_offset; + uint64_t size; + uint32_t available_caching; + uint32_t default_caching; + const struct ttm_mem_type_manager_func *func; + void *priv; + struct mutex io_reserve_mutex; + bool use_io_reserve_lru; + bool io_reserve_fastpath; + + /* + * Protected by @io_reserve_mutex: + */ + + struct list_head io_reserve_lru; + + /* + * Protected by the global->lru_lock. + */ + + struct list_head lru; +}; + +/** + * struct ttm_bo_driver + * + * @create_ttm_backend_entry: Callback to create a struct ttm_backend. + * @invalidate_caches: Callback to invalidate read caches when a buffer object + * has been evicted. + * @init_mem_type: Callback to initialize a struct ttm_mem_type_manager + * structure. + * @evict_flags: Callback to obtain placement flags when a buffer is evicted. + * @move: Callback for a driver to hook in accelerated functions to + * move a buffer. + * If set to NULL, a potentially slow memcpy() move is used. + * @sync_obj_signaled: See ttm_fence_api.h + * @sync_obj_wait: See ttm_fence_api.h + * @sync_obj_flush: See ttm_fence_api.h + * @sync_obj_unref: See ttm_fence_api.h + * @sync_obj_ref: See ttm_fence_api.h + */ + +struct ttm_bo_driver { + /** + * 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. + * @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. + */ + 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 + */ + void (*ttm_tt_unpopulate)(struct ttm_tt *ttm); + + /** + * struct ttm_bo_driver member invalidate_caches + * + * @bdev: the buffer object device. + * @flags: new placement of the rebound buffer object. + * + * A previosly evicted buffer has been rebound in a + * potentially new location. Tell the driver that it might + * consider invalidating read (texture) caches on the next command + * submission as a consequence. + */ + + int (*invalidate_caches) (struct ttm_bo_device *bdev, uint32_t flags); + int (*init_mem_type) (struct ttm_bo_device *bdev, uint32_t type, + struct ttm_mem_type_manager *man); + /** + * struct ttm_bo_driver member evict_flags: + * + * @bo: the buffer object to be evicted + * + * Return the bo flags for a buffer which is not mapped to the hardware. + * These will be placed in proposed_flags so that when the move is + * finished, they'll end up in bo->mem.flags + */ + + void(*evict_flags) (struct ttm_buffer_object *bo, + struct ttm_placement *placement); + /** + * struct ttm_bo_driver member move: + * + * @bo: the buffer to move + * @evict: whether this motion is evicting the buffer from + * the graphics address space + * @interruptible: Use interruptible sleeps if possible when sleeping. + * @no_wait: whether this should give up and return -EBUSY + * if this move would require sleeping + * @new_mem: the new memory region receiving the buffer + * + * Move a buffer between two memory regions. + */ + int (*move) (struct ttm_buffer_object *bo, + bool evict, bool interruptible, + bool no_wait_gpu, + struct ttm_mem_reg *new_mem); + + /** + * 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); + + /** + * In case a driver writer dislikes the TTM fence objects, + * the driver writer can replace those with sync objects of + * his / her own. If it turns out that no driver writer is + * using these. I suggest we remove these hooks and plug in + * 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); + int (*sync_obj_wait) (void *sync_obj, + bool lazy, bool interruptible); + 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. + */ + 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); +}; + +/** + * struct ttm_bo_global_ref - Argument to initialize a struct ttm_bo_global. + */ + +struct ttm_bo_global_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. + * @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. + * @device_list: List of buffer object devices. + * @swap_lru: Lru list of buffer objects used for swapping. + */ + +struct ttm_bo_global { + + /** + * Constant after init. + */ + +// struct kobject kobj; + struct ttm_mem_global *mem_glob; + struct page *dummy_read_page; + struct ttm_mem_shrink shrink; + struct mutex device_list_mutex; + spinlock_t lru_lock; + + /** + * Protected by device_list_mutex. + */ + struct list_head device_list; + + /** + * Protected by the lru_lock. + */ + struct list_head swap_lru; + + /** + * Internal protection. + */ + atomic_t bo_count; +}; + + +#define TTM_NUM_MEM_TYPES 8 + +#define TTM_BO_PRIV_FLAG_MOVING 0 /* Buffer object is moving and needs + idling before CPU mapping */ +#define TTM_BO_PRIV_FLAG_MAX 1 +/** + * 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. + * @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 ttm_bo_device { + + /* + * Constant after bo device init / atomic. + */ + struct list_head device_list; + struct ttm_bo_global *glob; + 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 drm_mm addr_space_mm; + + /* + * Protected by the global:lru lock. + */ + struct list_head ddestroy; + uint32_t val_seq; + + /* + * Protected by load / firstopen / lastclose /unload sync. + */ + + struct address_space *dev_mapping; + + /* + * Internal protection. + */ + + struct delayed_work wq; + + bool need_dma32; +}; + +/** + * ttm_flag_masked + * + * @old: Pointer to the result and original value. + * @new: New value of bits. + * @mask: Mask of bits to change. + * + * Convenience function to change a number of bits identified by a mask. + */ + +static inline uint32_t +ttm_flag_masked(uint32_t *old, uint32_t new, uint32_t mask) +{ + *old ^= (*old ^ new) & mask; + return *old; +} + +/** + * 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 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_fini + * + * @ttm: the ttm_tt structure. + * + * 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); + +/** + * ttm_ttm_bind: + * + * @ttm: The struct ttm_tt containing backing pages. + * @bo_mem: The struct ttm_mem_reg identifying the binding location. + * + * 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_ttm_destroy: + * + * @ttm: The struct ttm_tt. + * + * Unbind, unpopulate and destroy common struct ttm_tt. + */ +extern void ttm_tt_destroy(struct ttm_tt *ttm); + +/** + * ttm_ttm_unbind: + * + * @ttm: The struct ttm_tt. + * + * Unbind a struct ttm_tt. + */ +extern void ttm_tt_unbind(struct ttm_tt *ttm); + +/** + * ttm_tt_swapin: + * + * @ttm: The struct ttm_tt. + * + * Swap in a previously swap out ttm_tt. + */ +extern int ttm_tt_swapin(struct ttm_tt *ttm); + +/** + * ttm_tt_cache_flush: + * + * @pages: An array of pointers to struct page:s to flush. + * @num_pages: Number of pages to flush. + * + * Flush the data of the indicated pages from the cpu caches. + * This is used when changing caching attributes of the pages from + * cache-coherent. + */ +extern void ttm_tt_cache_flush(struct page *pages[], unsigned long num_pages); + +/** + * ttm_tt_set_placement_caching: + * + * @ttm A struct ttm_tt the backing pages of which will change caching policy. + * @placement: Flag indicating the desired caching policy. + * + * This function will change caching policy of any default kernel mappings of + * the pages backing @ttm. If changing from cached to uncached or + * write-combined, + * all CPU caches will first be flushed to make sure the data of the pages + * 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 *persistent_swap_storage); + +/* + * ttm_bo.c + */ + +/** + * ttm_mem_reg_is_pci + * + * @bdev: Pointer to a struct ttm_bo_device. + * @mem: A valid struct ttm_mem_reg. + * + * Returns true if the memory described by @mem is PCI memory, + * false otherwise. + */ +extern bool ttm_mem_reg_is_pci(struct ttm_bo_device *bdev, + struct ttm_mem_reg *mem); + +/** + * ttm_bo_mem_space + * + * @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_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: + * -EBUSY: No space available (only if no_wait == 1). + * -ENOMEM: Could not allocate memory for the buffer object, either due to + * fragmentation or concurrent allocators. + * -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_gpu); + +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); + +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_device_release(struct ttm_bo_device *bdev); + +/** + * ttm_bo_device_init + * + * @bdev: A pointer to a struct ttm_bo_device to initialize. + * @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 + * address space. + * + * Initializes a struct ttm_bo_device: + * Returns: + * !0: Failure. + */ +extern int ttm_bo_device_init(struct ttm_bo_device *bdev, + struct ttm_bo_global *glob, + struct ttm_bo_driver *driver, + uint64_t file_page_offset, bool need_dma32); + +/** + * ttm_bo_unmap_virtual + * + * @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. + * @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. + * + * Locks a buffer object for validation. (Or prevents other processes from + * locking it for validation) and removes it from lru lists, while taking + * a number of measures to prevent deadlocks. + * + * 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 + * 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 + * is still the first buffer in the lru list, before it is removed from the + * list. @check_lru == 1 forces this check. If it fails, the function returns + * -EINVAL, and the caller should then choose a new buffer to evict and repeat + * the procedure. + * 2) Processes attempting to reserve multiple buffers other than for eviction, + * (typically execbuf), should first obtain a unique 32-bit + * validation sequence number, + * and call this function with @use_sequence == 1 and @sequence == the unique + * sequence number. If upon call of this function, the buffer object is already + * reserved, the validation sequence is checked against the validation + * sequence of the process currently reserving the buffer, + * and if the current validation sequence is greater than that of the process + * holding the reservation, the function returns -EAGAIN. Otherwise it sleeps + * waiting for the buffer to become unreserved, after which it retries + * reserving. + * The caller should, when receiving an -EAGAIN error + * release all its buffer reservations, wait for @bo to become unreserved, and + * then rerun the validation with the same validation sequence. This procedure + * will always guarantee that the process with the lowest validation sequence + * will eventually succeed, preventing both deadlocks and starvation. + * + * 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 int ttm_bo_reserve(struct ttm_buffer_object *bo, + bool interruptible, + bool no_wait, bool use_sequence, uint32_t sequence); + + +/** + * 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. + * + * 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 int ttm_bo_reserve_locked(struct ttm_buffer_object *bo, + bool interruptible, + bool no_wait, bool use_sequence, + uint32_t sequence); + +/** + * ttm_bo_unreserve + * + * @bo: A pointer to a struct ttm_buffer_object. + * + * Unreserve a previous reservation of @bo. + */ +extern void ttm_bo_unreserve(struct ttm_buffer_object *bo); + +/** + * ttm_bo_unreserve_locked + * + * @bo: A pointer to a struct ttm_buffer_object. + * + * Unreserve a previous reservation of @bo. + * Needs to be called with struct ttm_bo_global::lru_lock held. + */ +extern void ttm_bo_unreserve_locked(struct ttm_buffer_object *bo); + +/** + * ttm_bo_wait_unreserved + * + * @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. + */ +extern int ttm_bo_wait_unreserved(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. + * @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 + * new placement backed by a TTM. The function will, if successful, + * free any old aperture space, and set (@new_mem)->mm_node to NULL, + * and update the (@bo)->mem placement flags. If unsuccessful, the old + * data remains untouched, and it's up to the caller to free the + * memory space indicated by @new_mem. + * Returns: + * !0: Failure. + */ + +extern int ttm_bo_move_ttm(struct ttm_buffer_object *bo, + 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_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. + * The function will, if successful, + * free any old aperture space, and set (@new_mem)->mm_node to NULL, + * and update the (@bo)->mem placement flags. If unsuccessful, the old + * data remains untouched, and it's up to the caller to free the + * memory space indicated by @new_mem. + * Returns: + * !0: Failure. + */ + +extern int ttm_bo_move_memcpy(struct ttm_buffer_object *bo, + bool evict, bool no_wait_gpu, + struct ttm_mem_reg *new_mem); + +/** + * ttm_bo_free_old_node + * + * @bo: A pointer to a struct ttm_buffer_object. + * + * Utility function to free an old placement after a successful move. + */ +extern void ttm_bo_free_old_node(struct ttm_buffer_object *bo); + +/** + * 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. + * @evict: This is an evict move. Don't return until the buffer is idle. + * @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 + * objects. After that the newly created buffer object is unref'd to be + * destroyed when the move is complete. This will help pipeline + * buffer moves. + */ + +extern int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo, + void *sync_obj, + 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 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_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_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 diff --git a/drivers/include/drm/ttm/ttm_memory.h b/drivers/include/drm/ttm/ttm_memory.h index 1bfd031723..1de3ad3542 100644 --- a/drivers/include/drm/ttm/ttm_memory.h +++ b/drivers/include/drm/ttm/ttm_memory.h @@ -1,159 +1,158 @@ -/************************************************************************** - * - * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA - * All Rights Reserved. - * - * 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, sub license, 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 (including the - * next paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL - * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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. - * - **************************************************************************/ - -#ifndef TTM_MEMORY_H -#define TTM_MEMORY_H - -//#include -#include -//#include -#include -//#include -//#include - -/** - * struct ttm_mem_shrink - callback to shrink TTM memory usage. - * - * @do_shrink: The callback function. - * - * Arguments to the do_shrink functions are intended to be passed using - * inheritance. That is, the argument class derives from struct ttm_mem_srink, - * and can be accessed using container_of(). - */ - -struct ttm_mem_shrink { - int (*do_shrink) (struct ttm_mem_shrink *); -}; - -/** - * struct ttm_mem_global - Global memory accounting structure. - * - * @shrink: A single callback to shrink TTM memory usage. Extend this - * to a linked list to be able to handle multiple callbacks when needed. - * @swap_queue: A workqueue to handle shrinking in low memory situations. We - * need a separate workqueue since it will spend a lot of time waiting - * for the GPU, and this will otherwise block other workqueue tasks(?) - * At this point we use only a single-threaded workqueue. - * @work: The workqueue callback for the shrink queue. - * @queue: Wait queue for processes suspended waiting for memory. - * @lock: Lock to protect the @shrink - and the memory accounting members, - * that is, essentially the whole structure with some exceptions. - * @zones: Array of pointers to accounting zones. - * @num_zones: Number of populated entries in the @zones array. - * @zone_kernel: Pointer to the kernel zone. - * @zone_highmem: Pointer to the highmem zone if there is one. - * @zone_dma32: Pointer to the dma32 zone if there is one. - * - * Note that this structure is not per device. It should be global for all - * graphics devices. - */ - -#define TTM_MEM_MAX_ZONES 2 -struct ttm_mem_zone; -struct ttm_mem_global { -// struct kobject kobj; - struct ttm_mem_shrink *shrink; -// struct workqueue_struct *swap_queue; -// struct work_struct work; -// wait_queue_head_t queue; - spinlock_t lock; - struct ttm_mem_zone *zones[TTM_MEM_MAX_ZONES]; - unsigned int num_zones; - struct ttm_mem_zone *zone_kernel; -#ifdef CONFIG_HIGHMEM - struct ttm_mem_zone *zone_highmem; -#else - struct ttm_mem_zone *zone_dma32; -#endif -}; - -/** - * ttm_mem_init_shrink - initialize a struct ttm_mem_shrink object - * - * @shrink: The object to initialize. - * @func: The callback function. - */ - -static inline void ttm_mem_init_shrink(struct ttm_mem_shrink *shrink, - int (*func) (struct ttm_mem_shrink *)) -{ - shrink->do_shrink = func; -} - -/** - * ttm_mem_register_shrink - register a struct ttm_mem_shrink object. - * - * @glob: The struct ttm_mem_global object to register with. - * @shrink: An initialized struct ttm_mem_shrink object to register. - * - * Returns: - * -EBUSY: There's already a callback registered. (May change). - */ - -static inline int ttm_mem_register_shrink(struct ttm_mem_global *glob, - struct ttm_mem_shrink *shrink) -{ - spin_lock(&glob->lock); - if (glob->shrink != NULL) { - spin_unlock(&glob->lock); - return -EBUSY; - } - glob->shrink = shrink; - spin_unlock(&glob->lock); - return 0; -} - -/** - * ttm_mem_unregister_shrink - unregister a struct ttm_mem_shrink object. - * - * @glob: The struct ttm_mem_global object to unregister from. - * @shrink: A previously registert struct ttm_mem_shrink object. - * - */ - -static inline void ttm_mem_unregister_shrink(struct ttm_mem_global *glob, - struct ttm_mem_shrink *shrink) -{ - spin_lock(&glob->lock); - BUG_ON(glob->shrink != shrink); - glob->shrink = NULL; - spin_unlock(&glob->lock); -} - -extern int ttm_mem_global_init(struct ttm_mem_global *glob); -extern void ttm_mem_global_release(struct ttm_mem_global *glob); -extern int ttm_mem_global_alloc(struct ttm_mem_global *glob, uint64_t memory, - bool no_wait, bool interruptible); -extern void ttm_mem_global_free(struct ttm_mem_global *glob, - uint64_t amount); -extern int ttm_mem_global_alloc_page(struct ttm_mem_global *glob, - struct page *page, - bool no_wait, bool interruptible); -extern void ttm_mem_global_free_page(struct ttm_mem_global *glob, - struct page *page); -extern size_t ttm_round_pot(size_t size); -#endif +/************************************************************************** + * + * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA + * All Rights Reserved. + * + * 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, sub license, 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 (including the + * next paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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. + * + **************************************************************************/ + +#ifndef TTM_MEMORY_H +#define TTM_MEMORY_H + +//#include +#include +#include +#include +#include +//#include +#include + +/** + * struct ttm_mem_shrink - callback to shrink TTM memory usage. + * + * @do_shrink: The callback function. + * + * Arguments to the do_shrink functions are intended to be passed using + * inheritance. That is, the argument class derives from struct ttm_mem_shrink, + * and can be accessed using container_of(). + */ + +struct ttm_mem_shrink { + int (*do_shrink) (struct ttm_mem_shrink *); +}; + +/** + * struct ttm_mem_global - Global memory accounting structure. + * + * @shrink: A single callback to shrink TTM memory usage. Extend this + * to a linked list to be able to handle multiple callbacks when needed. + * @swap_queue: A workqueue to handle shrinking in low memory situations. We + * need a separate workqueue since it will spend a lot of time waiting + * for the GPU, and this will otherwise block other workqueue tasks(?) + * At this point we use only a single-threaded workqueue. + * @work: The workqueue callback for the shrink queue. + * @lock: Lock to protect the @shrink - and the memory accounting members, + * that is, essentially the whole structure with some exceptions. + * @zones: Array of pointers to accounting zones. + * @num_zones: Number of populated entries in the @zones array. + * @zone_kernel: Pointer to the kernel zone. + * @zone_highmem: Pointer to the highmem zone if there is one. + * @zone_dma32: Pointer to the dma32 zone if there is one. + * + * Note that this structure is not per device. It should be global for all + * graphics devices. + */ + +#define TTM_MEM_MAX_ZONES 2 +struct ttm_mem_zone; +struct ttm_mem_global { +// struct kobject kobj; + struct ttm_mem_shrink *shrink; + struct workqueue_struct *swap_queue; + struct work_struct work; + spinlock_t lock; + struct ttm_mem_zone *zones[TTM_MEM_MAX_ZONES]; + unsigned int num_zones; + struct ttm_mem_zone *zone_kernel; +#ifdef CONFIG_HIGHMEM + struct ttm_mem_zone *zone_highmem; +#else + struct ttm_mem_zone *zone_dma32; +#endif +}; + +/** + * ttm_mem_init_shrink - initialize a struct ttm_mem_shrink object + * + * @shrink: The object to initialize. + * @func: The callback function. + */ + +static inline void ttm_mem_init_shrink(struct ttm_mem_shrink *shrink, + int (*func) (struct ttm_mem_shrink *)) +{ + shrink->do_shrink = func; +} + +/** + * ttm_mem_register_shrink - register a struct ttm_mem_shrink object. + * + * @glob: The struct ttm_mem_global object to register with. + * @shrink: An initialized struct ttm_mem_shrink object to register. + * + * Returns: + * -EBUSY: There's already a callback registered. (May change). + */ + +static inline int ttm_mem_register_shrink(struct ttm_mem_global *glob, + struct ttm_mem_shrink *shrink) +{ + spin_lock(&glob->lock); + if (glob->shrink != NULL) { + spin_unlock(&glob->lock); + return -EBUSY; + } + glob->shrink = shrink; + spin_unlock(&glob->lock); + return 0; +} + +/** + * ttm_mem_unregister_shrink - unregister a struct ttm_mem_shrink object. + * + * @glob: The struct ttm_mem_global object to unregister from. + * @shrink: A previously registert struct ttm_mem_shrink object. + * + */ + +static inline void ttm_mem_unregister_shrink(struct ttm_mem_global *glob, + struct ttm_mem_shrink *shrink) +{ + spin_lock(&glob->lock); + BUG_ON(glob->shrink != shrink); + glob->shrink = NULL; + spin_unlock(&glob->lock); +} + +extern int ttm_mem_global_init(struct ttm_mem_global *glob); +extern void ttm_mem_global_release(struct ttm_mem_global *glob); +extern int ttm_mem_global_alloc(struct ttm_mem_global *glob, uint64_t memory, + bool no_wait, bool interruptible); +extern void ttm_mem_global_free(struct ttm_mem_global *glob, + uint64_t amount); +extern int ttm_mem_global_alloc_page(struct ttm_mem_global *glob, + struct page *page, + bool no_wait, bool interruptible); +extern void ttm_mem_global_free_page(struct ttm_mem_global *glob, + struct page *page); +extern size_t ttm_round_pot(size_t size); +#endif diff --git a/drivers/include/drm/ttm/ttm_module.h b/drivers/include/drm/ttm/ttm_module.h index 8f79b2c4e9..45fa318c15 100644 --- a/drivers/include/drm/ttm/ttm_module.h +++ b/drivers/include/drm/ttm/ttm_module.h @@ -1,60 +1,40 @@ -/************************************************************************** - * - * Copyright 2008-2009 VMware, Inc., Palo Alto, CA., USA - * All Rights Reserved. - * - * 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, sub license, 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 (including the - * next paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL - * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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: Thomas Hellstrom - */ - -#ifndef _TTM_MODULE_H_ -#define _TTM_MODULE_H_ - -#include -struct kobject; - -#define TTM_PFX "[TTM] " - -enum ttm_global_types { - TTM_GLOBAL_TTM_MEM = 0, - TTM_GLOBAL_TTM_BO, - TTM_GLOBAL_TTM_OBJECT, - TTM_GLOBAL_NUM -}; - -struct ttm_global_reference { - enum ttm_global_types global_type; - size_t size; - void *object; - int (*init) (struct ttm_global_reference *); - void (*release) (struct ttm_global_reference *); -}; - -extern void ttm_global_init(void); -extern void ttm_global_release(void); -extern int ttm_global_item_ref(struct ttm_global_reference *ref); -extern void ttm_global_item_unref(struct ttm_global_reference *ref); -extern struct kobject *ttm_get_kobj(void); - -#endif /* _TTM_MODULE_H_ */ +/************************************************************************** + * + * Copyright 2008-2009 VMware, Inc., Palo Alto, CA., USA + * All Rights Reserved. + * + * 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, sub license, 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 (including the + * next paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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: Thomas Hellstrom + */ + +#ifndef _TTM_MODULE_H_ +#define _TTM_MODULE_H_ + +#include +struct kobject; + +#define TTM_PFX "[TTM] " +extern struct kobject *ttm_get_kobj(void); + +#endif /* _TTM_MODULE_H_ */ diff --git a/drivers/include/drm/ttm/ttm_placement.h b/drivers/include/drm/ttm/ttm_placement.h index 34b3bb92ed..c84ff153a5 100644 --- a/drivers/include/drm/ttm/ttm_placement.h +++ b/drivers/include/drm/ttm/ttm_placement.h @@ -1,92 +1,92 @@ -/************************************************************************** - * - * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA - * All Rights Reserved. - * - * 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, sub license, 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 (including the - * next paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL - * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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: Thomas Hellstrom - */ - -#ifndef _TTM_PLACEMENT_H_ -#define _TTM_PLACEMENT_H_ -/* - * Memory regions for data placement. - */ - -#define TTM_PL_SYSTEM 0 -#define TTM_PL_TT 1 -#define TTM_PL_VRAM 2 -#define TTM_PL_PRIV0 3 -#define TTM_PL_PRIV1 4 -#define TTM_PL_PRIV2 5 -#define TTM_PL_PRIV3 6 -#define TTM_PL_PRIV4 7 -#define TTM_PL_PRIV5 8 -#define TTM_PL_SWAPPED 15 - -#define TTM_PL_FLAG_SYSTEM (1 << TTM_PL_SYSTEM) -#define TTM_PL_FLAG_TT (1 << TTM_PL_TT) -#define TTM_PL_FLAG_VRAM (1 << TTM_PL_VRAM) -#define TTM_PL_FLAG_PRIV0 (1 << TTM_PL_PRIV0) -#define TTM_PL_FLAG_PRIV1 (1 << TTM_PL_PRIV1) -#define TTM_PL_FLAG_PRIV2 (1 << TTM_PL_PRIV2) -#define TTM_PL_FLAG_PRIV3 (1 << TTM_PL_PRIV3) -#define TTM_PL_FLAG_PRIV4 (1 << TTM_PL_PRIV4) -#define TTM_PL_FLAG_PRIV5 (1 << TTM_PL_PRIV5) -#define TTM_PL_FLAG_SWAPPED (1 << TTM_PL_SWAPPED) -#define TTM_PL_MASK_MEM 0x0000FFFF - -/* - * Other flags that affects data placement. - * TTM_PL_FLAG_CACHED indicates cache-coherent mappings - * if available. - * TTM_PL_FLAG_SHARED means that another application may - * reference the buffer. - * TTM_PL_FLAG_NO_EVICT means that the buffer may never - * be evicted to make room for other buffers. - */ - -#define TTM_PL_FLAG_CACHED (1 << 16) -#define TTM_PL_FLAG_UNCACHED (1 << 17) -#define TTM_PL_FLAG_WC (1 << 18) -#define TTM_PL_FLAG_SHARED (1 << 20) -#define TTM_PL_FLAG_NO_EVICT (1 << 21) - -#define TTM_PL_MASK_CACHING (TTM_PL_FLAG_CACHED | \ - TTM_PL_FLAG_UNCACHED | \ - TTM_PL_FLAG_WC) - -#define TTM_PL_MASK_MEMTYPE (TTM_PL_MASK_MEM | TTM_PL_MASK_CACHING) - -/* - * Access flags to be used for CPU- and GPU- mappings. - * The idea is that the TTM synchronization mechanism will - * allow concurrent READ access and exclusive write access. - * Currently GPU- and CPU accesses are exclusive. - */ - -#define TTM_ACCESS_READ (1 << 0) -#define TTM_ACCESS_WRITE (1 << 1) - -#endif +/************************************************************************** + * + * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA + * All Rights Reserved. + * + * 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, sub license, 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 (including the + * next paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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: Thomas Hellstrom + */ + +#ifndef _TTM_PLACEMENT_H_ +#define _TTM_PLACEMENT_H_ +/* + * Memory regions for data placement. + */ + +#define TTM_PL_SYSTEM 0 +#define TTM_PL_TT 1 +#define TTM_PL_VRAM 2 +#define TTM_PL_PRIV0 3 +#define TTM_PL_PRIV1 4 +#define TTM_PL_PRIV2 5 +#define TTM_PL_PRIV3 6 +#define TTM_PL_PRIV4 7 +#define TTM_PL_PRIV5 8 +#define TTM_PL_SWAPPED 15 + +#define TTM_PL_FLAG_SYSTEM (1 << TTM_PL_SYSTEM) +#define TTM_PL_FLAG_TT (1 << TTM_PL_TT) +#define TTM_PL_FLAG_VRAM (1 << TTM_PL_VRAM) +#define TTM_PL_FLAG_PRIV0 (1 << TTM_PL_PRIV0) +#define TTM_PL_FLAG_PRIV1 (1 << TTM_PL_PRIV1) +#define TTM_PL_FLAG_PRIV2 (1 << TTM_PL_PRIV2) +#define TTM_PL_FLAG_PRIV3 (1 << TTM_PL_PRIV3) +#define TTM_PL_FLAG_PRIV4 (1 << TTM_PL_PRIV4) +#define TTM_PL_FLAG_PRIV5 (1 << TTM_PL_PRIV5) +#define TTM_PL_FLAG_SWAPPED (1 << TTM_PL_SWAPPED) +#define TTM_PL_MASK_MEM 0x0000FFFF + +/* + * Other flags that affects data placement. + * TTM_PL_FLAG_CACHED indicates cache-coherent mappings + * if available. + * TTM_PL_FLAG_SHARED means that another application may + * reference the buffer. + * TTM_PL_FLAG_NO_EVICT means that the buffer may never + * be evicted to make room for other buffers. + */ + +#define TTM_PL_FLAG_CACHED (1 << 16) +#define TTM_PL_FLAG_UNCACHED (1 << 17) +#define TTM_PL_FLAG_WC (1 << 18) +#define TTM_PL_FLAG_SHARED (1 << 20) +#define TTM_PL_FLAG_NO_EVICT (1 << 21) + +#define TTM_PL_MASK_CACHING (TTM_PL_FLAG_CACHED | \ + TTM_PL_FLAG_UNCACHED | \ + TTM_PL_FLAG_WC) + +#define TTM_PL_MASK_MEMTYPE (TTM_PL_MASK_MEM | TTM_PL_MASK_CACHING) + +/* + * Access flags to be used for CPU- and GPU- mappings. + * The idea is that the TTM synchronization mechanism will + * allow concurrent READ access and exclusive write access. + * Currently GPU- and CPU accesses are exclusive. + */ + +#define TTM_ACCESS_READ (1 << 0) +#define TTM_ACCESS_WRITE (1 << 1) + +#endif diff --git a/drivers/include/linux/kernel.h b/drivers/include/linux/kernel.h index 23391dec34..c1bf65dd9c 100644 --- a/drivers/include/linux/kernel.h +++ b/drivers/include/linux/kernel.h @@ -203,7 +203,14 @@ typedef unsigned long pgprotval_t; typedef struct pgprot { pgprotval_t pgprot; } pgprot_t; -struct file {}; +struct file +{ + struct page **pages; /* physical memory backend */ + unsigned int count; + unsigned int allocated; + void *vma; +}; + struct vm_area_struct {}; struct address_space {}; diff --git a/drivers/include/linux/mm.h b/drivers/include/linux/mm.h index d3f5a12faa..5ff124aeab 100644 --- a/drivers/include/linux/mm.h +++ b/drivers/include/linux/mm.h @@ -1 +1,8 @@ +#ifndef _LINUX_MM_H +#define _LINUX_MM_H + +#define VM_NORESERVE 0x00200000 +#define PAGE_ALIGN(addr) ALIGN(addr, PAGE_SIZE) + +#endif