diff options
Diffstat (limited to 'include/drm/ttm')
| -rw-r--r-- | include/drm/ttm/ttm_bo_driver.h | 9 | ||||
| -rw-r--r-- | include/drm/ttm/ttm_execbuf_util.h | 107 | ||||
| -rw-r--r-- | include/drm/ttm/ttm_lock.h | 247 | ||||
| -rw-r--r-- | include/drm/ttm/ttm_memory.h | 1 | ||||
| -rw-r--r-- | include/drm/ttm/ttm_object.h | 267 |
5 files changed, 631 insertions, 0 deletions
diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h index e8cd6d20aed..7a39ab9aa1d 100644 --- a/include/drm/ttm/ttm_bo_driver.h +++ b/include/drm/ttm/ttm_bo_driver.h @@ -545,6 +545,15 @@ extern int ttm_tt_set_user(struct ttm_tt *ttm, 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. diff --git a/include/drm/ttm/ttm_execbuf_util.h b/include/drm/ttm/ttm_execbuf_util.h new file mode 100644 index 00000000000..cd2c475da9e --- /dev/null +++ b/include/drm/ttm/ttm_execbuf_util.h @@ -0,0 +1,107 @@ +/************************************************************************** + * + * 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 <thellstrom-at-vmware-dot-com> + */ + +#ifndef _TTM_EXECBUF_UTIL_H_ +#define _TTM_EXECBUF_UTIL_H_ + +#include "ttm/ttm_bo_api.h" +#include <linux/list.h> + +/** + * struct ttm_validate_buffer + * + * @head: list head for thread-private list. + * @bo: refcounted buffer object pointer. + * @new_sync_obj_arg: New sync_obj_arg for @bo, to be used once + * adding a new sync object. + * @reservied: Indicates whether @bo has been reserved for validation. + */ + +struct ttm_validate_buffer { + struct list_head head; + struct ttm_buffer_object *bo; + void *new_sync_obj_arg; + bool reserved; +}; + +/** + * function ttm_eu_backoff_reservation + * + * @list: thread private list of ttm_validate_buffer structs. + * + * Undoes all buffer validation reservations for bos pointed to by + * the list entries. + */ + +extern void ttm_eu_backoff_reservation(struct list_head *list); + +/** + * function ttm_eu_reserve_buffers + * + * @list: thread private list of ttm_validate_buffer structs. + * @val_seq: A unique sequence number. + * + * Tries to reserve bos pointed to by the list entries for validation. + * If the function returns 0, all buffers are marked as "unfenced", + * taken off the lru lists and are not synced for write CPU usage. + * + * If the function detects a deadlock due to multiple threads trying to + * reserve the same buffers in reverse order, all threads except one will + * back off and retry. This function may sleep while waiting for + * CPU write reservations to be cleared, and for other threads to + * unreserve their buffers. + * + * This function may return -ERESTART or -EAGAIN if the calling process + * receives a signal while waiting. In that case, no buffers on the list + * will be reserved upon return. + * + * Buffers reserved by this function should be unreserved by + * a call to either ttm_eu_backoff_reservation() or + * ttm_eu_fence_buffer_objects() when command submission is complete or + * has failed. + */ + +extern int ttm_eu_reserve_buffers(struct list_head *list, uint32_t val_seq); + +/** + * function ttm_eu_fence_buffer_objects. + * + * @list: thread private list of ttm_validate_buffer structs. + * @sync_obj: The new sync object for the buffers. + * + * This function should be called when command submission is complete, and + * it will add a new sync object to bos pointed to by entries on @list. + * It also unreserves all buffers, putting them on lru lists. + * + */ + +extern void ttm_eu_fence_buffer_objects(struct list_head *list, void *sync_obj); + +#endif diff --git a/include/drm/ttm/ttm_lock.h b/include/drm/ttm/ttm_lock.h new file mode 100644 index 00000000000..81ba0b0b891 --- /dev/null +++ b/include/drm/ttm/ttm_lock.h @@ -0,0 +1,247 @@ +/************************************************************************** + * + * Copyright (c) 2007-2009 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 <thellstrom-at-vmware-dot-com> + */ + +/** @file ttm_lock.h + * This file implements a simple replacement for the buffer manager use + * of the DRM heavyweight hardware lock. + * The lock is a read-write lock. Taking it in read mode and write mode + * is relatively fast, and intended for in-kernel use only. + * + * The vt mode is used only when there is a need to block all + * user-space processes from validating buffers. + * It's allowed to leave kernel space with the vt lock held. + * If a user-space process dies while having the vt-lock, + * it will be released during the file descriptor release. The vt lock + * excludes write lock and read lock. + * + * The suspend mode is used to lock out all TTM users when preparing for + * and executing suspend operations. + * + */ + +#ifndef _TTM_LOCK_H_ +#define _TTM_LOCK_H_ + +#include "ttm/ttm_object.h" +#include <linux/wait.h> +#include <asm/atomic.h> + +/** + * struct ttm_lock + * + * @base: ttm base object used solely to release the lock if the client + * holding the lock dies. + * @queue: Queue for processes waiting for lock change-of-status. + * @lock: Spinlock protecting some lock members. + * @rw: Read-write lock counter. Protected by @lock. + * @flags: Lock state. Protected by @lock. + * @kill_takers: Boolean whether to kill takers of the lock. + * @signal: Signal to send when kill_takers is true. + */ + +struct ttm_lock { + struct ttm_base_object base; + wait_queue_head_t queue; + spinlock_t lock; + int32_t rw; + uint32_t flags; + bool kill_takers; + int signal; + struct ttm_object_file *vt_holder; +}; + + +/** + * ttm_lock_init + * + * @lock: Pointer to a struct ttm_lock + * Initializes the lock. + */ +extern void ttm_lock_init(struct ttm_lock *lock); + +/** + * ttm_read_unlock + * + * @lock: Pointer to a struct ttm_lock + * + * Releases a read lock. + */ +extern void ttm_read_unlock(struct ttm_lock *lock); + +/** + * ttm_read_lock + * + * @lock: Pointer to a struct ttm_lock + * @interruptible: Interruptible sleeping while waiting for a lock. + * + * Takes the lock in read mode. + * Returns: + * -ERESTARTSYS If interrupted by a signal and interruptible is true. + */ +extern int ttm_read_lock(struct ttm_lock *lock, bool interruptible); + +/** + * ttm_read_trylock + * + * @lock: Pointer to a struct ttm_lock + * @interruptible: Interruptible sleeping while waiting for a lock. + * + * Tries to take the lock in read mode. If the lock is already held + * in write mode, the function will return -EBUSY. If the lock is held + * in vt or suspend mode, the function will sleep until these modes + * are unlocked. + * + * Returns: + * -EBUSY The lock was already held in write mode. + * -ERESTARTSYS If interrupted by a signal and interruptible is true. + */ +extern int ttm_read_trylock(struct ttm_lock *lock, bool interruptible); + +/** + * ttm_write_unlock + * + * @lock: Pointer to a struct ttm_lock + * + * Releases a write lock. + */ +extern void ttm_write_unlock(struct ttm_lock *lock); + +/** + * ttm_write_lock + * + * @lock: Pointer to a struct ttm_lock + * @interruptible: Interruptible sleeping while waiting for a lock. + * + * Takes the lock in write mode. + * Returns: + * -ERESTARTSYS If interrupted by a signal and interruptible is true. + */ +extern int ttm_write_lock(struct ttm_lock *lock, bool interruptible); + +/** + * ttm_lock_downgrade + * + * @lock: Pointer to a struct ttm_lock + * + * Downgrades a write lock to a read lock. + */ +extern void ttm_lock_downgrade(struct ttm_lock *lock); + +/** + * ttm_suspend_lock + * + * @lock: Pointer to a struct ttm_lock + * + * Takes the lock in suspend mode. Excludes read and write mode. + */ +extern void ttm_suspend_lock(struct ttm_lock *lock); + +/** + * ttm_suspend_unlock + * + * @lock: Pointer to a struct ttm_lock + * + * Releases a suspend lock + */ +extern void ttm_suspend_unlock(struct ttm_lock *lock); + +/** + * ttm_vt_lock + * + * @lock: Pointer to a struct ttm_lock + * @interruptible: Interruptible sleeping while waiting for a lock. + * @tfile: Pointer to a struct ttm_object_file to register the lock with. + * + * Takes the lock in vt mode. + * Returns: + * -ERESTARTSYS If interrupted by a signal and interruptible is true. + * -ENOMEM: Out of memory when locking. + */ +extern int ttm_vt_lock(struct ttm_lock *lock, bool interruptible, + struct ttm_object_file *tfile); + +/** + * ttm_vt_unlock + * + * @lock: Pointer to a struct ttm_lock + * + * Releases a vt lock. + * Returns: + * -EINVAL If the lock was not held. + */ +extern int ttm_vt_unlock(struct ttm_lock *lock); + +/** + * ttm_write_unlock + * + * @lock: Pointer to a struct ttm_lock + * + * Releases a write lock. + */ +extern void ttm_write_unlock(struct ttm_lock *lock); + +/** + * ttm_write_lock + * + * @lock: Pointer to a struct ttm_lock + * @interruptible: Interruptible sleeping while waiting for a lock. + * + * Takes the lock in write mode. + * Returns: + * -ERESTARTSYS If interrupted by a signal and interruptible is true. + */ +extern int ttm_write_lock(struct ttm_lock *lock, bool interruptible); + +/** + * ttm_lock_set_kill + * + * @lock: Pointer to a struct ttm_lock + * @val: Boolean whether to kill processes taking the lock. + * @signal: Signal to send to the process taking the lock. + * + * The kill-when-taking-lock functionality is used to kill processes that keep + * on using the TTM functionality when its resources has been taken down, for + * example when the X server exits. A typical sequence would look like this: + * - X server takes lock in write mode. + * - ttm_lock_set_kill() is called with @val set to true. + * - As part of X server exit, TTM resources are taken down. + * - X server releases the lock on file release. + * - Another dri client wants to render, takes the lock and is killed. + * + */ +static inline void ttm_lock_set_kill(struct ttm_lock *lock, bool val, + int signal) +{ + lock->kill_takers = val; + if (val) + lock->signal = signal; +} + +#endif diff --git a/include/drm/ttm/ttm_memory.h b/include/drm/ttm/ttm_memory.h index 6983a7cf4da..b199170b3c2 100644 --- a/include/drm/ttm/ttm_memory.h +++ b/include/drm/ttm/ttm_memory.h @@ -33,6 +33,7 @@ #include <linux/wait.h> #include <linux/errno.h> #include <linux/kobject.h> +#include <linux/mm.h> /** * struct ttm_mem_shrink - callback to shrink TTM memory usage. diff --git a/include/drm/ttm/ttm_object.h b/include/drm/ttm/ttm_object.h new file mode 100644 index 00000000000..703ca4db0a2 --- /dev/null +++ b/include/drm/ttm/ttm_object.h @@ -0,0 +1,267 @@ +/************************************************************************** + * + * 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 <thellstrom-at-vmware-dot-com> + */ +/** @file ttm_object.h + * + * Base- and reference object implementation for the various + * ttm objects. Implements reference counting, minimal security checks + * and release on file close. + */ + +#ifndef _TTM_OBJECT_H_ +#define _TTM_OBJECT_H_ + +#include <linux/list.h> +#include "drm_hashtab.h" +#include <linux/kref.h> +#include <ttm/ttm_memory.h> + +/** + * enum ttm_ref_type + * + * Describes what type of reference a ref object holds. + * + * TTM_REF_USAGE is a simple refcount on a base object. + * + * TTM_REF_SYNCCPU_READ is a SYNCCPU_READ reference on a + * buffer object. + * + * TTM_REF_SYNCCPU_WRITE is a SYNCCPU_WRITE reference on a + * buffer object. + * + */ + +enum ttm_ref_type { + TTM_REF_USAGE, + TTM_REF_SYNCCPU_READ, + TTM_REF_SYNCCPU_WRITE, + TTM_REF_NUM +}; + +/** + * enum ttm_object_type + * + * One entry per ttm object type. + * Device-specific types should use the + * ttm_driver_typex types. + */ + +enum ttm_object_type { + ttm_fence_type, + ttm_buffer_type, + ttm_lock_type, + ttm_driver_type0 = 256, + ttm_driver_type1 +}; + +struct ttm_object_file; +struct ttm_object_device; + +/** + * struct ttm_base_object + * + * @hash: hash entry for the per-device object hash. + * @type: derived type this object is base class for. + * @shareable: Other ttm_object_files can access this object. + * + * @tfile: Pointer to ttm_object_file of the creator. + * NULL if the object was not created by a user request. + * (kernel object). + * + * @refcount: Number of references to this object, not + * including the hash entry. A reference to a base object can + * only be held by a ref object. + * + * @refcount_release: A function to be called when there are + * no more references to this object. This function should + * destroy the object (or make sure destruction eventually happens), + * and when it is called, the object has + * already been taken out of the per-device hash. The parameter + * "base" should be set to NULL by the function. + * + * @ref_obj_release: A function to be called when a reference object + * with another ttm_ref_type than TTM_REF_USAGE is deleted. + * this function may, for example, release a lock held by a user-space + * process. + * + * This struct is intended to be used as a base struct for objects that + * are visible to user-space. It provides a global name, race-safe + * access and refcounting, minimal access contol and hooks for unref actions. + */ + +struct ttm_base_object { + struct drm_hash_item hash; + enum ttm_object_type object_type; + bool shareable; + struct ttm_object_file *tfile; + struct kref refcount; + void (*refcount_release) (struct ttm_base_object **base); + void (*ref_obj_release) (struct ttm_base_object *base, + enum ttm_ref_type ref_type); +}; + +/** + * ttm_base_object_init + * + * @tfile: Pointer to a struct ttm_object_file. + * @base: The struct ttm_base_object to initialize. + * @shareable: This object is shareable with other applcations. + * (different @tfile pointers.) + * @type: The object type. + * @refcount_release: See the struct ttm_base_object description. + * @ref_obj_release: See the struct ttm_base_object description. + * + * Initializes a struct ttm_base_object. + */ + +extern int ttm_base_object_init(struct ttm_object_file *tfile, + struct ttm_base_object *base, + bool shareable, + enum ttm_object_type type, + void (*refcount_release) (struct ttm_base_object + **), + void (*ref_obj_release) (struct ttm_base_object + *, + enum ttm_ref_type + ref_type)); + +/** + * ttm_base_object_lookup + * + * @tfile: Pointer to a struct ttm_object_file. + * @key: Hash key + * + * Looks up a struct ttm_base_object with the key @key. + * Also verifies that the object is visible to the application, by + * comparing the @tfile argument and checking the object shareable flag. + */ + +extern struct ttm_base_object *ttm_base_object_lookup(struct ttm_object_file + *tfile, uint32_t key); + +/** + * ttm_base_object_unref + * + * @p_base: Pointer to a pointer referncing a struct ttm_base_object. + * + * Decrements the base object refcount and clears the pointer pointed to by + * p_base. + */ + +extern void ttm_base_object_unref(struct ttm_base_object **p_base); + +/** + * ttm_ref_object_add. + * + * @tfile: A struct ttm_object_file representing the application owning the + * ref_object. + * @base: The base object to reference. + * @ref_type: The type of reference. + * @existed: Upon completion, indicates that an identical reference object + * already existed, and the refcount was upped on that object instead. + * + * Adding a ref object to a base object is basically like referencing the + * base object, but a user-space application holds the reference. When the + * file corresponding to @tfile is closed, all its reference objects are + * deleted. A reference object can have different types depending on what + * it's intended for. It can be refcounting to prevent object destruction, + * When user-space takes a lock, it can add a ref object to that lock to + * make sure the lock is released if the application dies. A ref object + * will hold a single reference on a base object. + */ +extern int ttm_ref_object_add(struct ttm_object_file *tfile, + struct ttm_base_object *base, + enum ttm_ref_type ref_type, bool *existed); +/** + * ttm_ref_object_base_unref + * + * @key: Key representing the base object. + * @ref_type: Ref type of the ref object to be dereferenced. + * + * Unreference a ref object with type @ref_type + * on the base object identified by @key. If there are no duplicate + * references, the ref object will be destroyed and the base object + * will be unreferenced. + */ +extern int ttm_ref_object_base_unref(struct ttm_object_file *tfile, + unsigned long key, + enum ttm_ref_type ref_type); + +/** + * ttm_object_file_init - initialize a struct ttm_object file + * + * @tdev: A struct ttm_object device this file is initialized on. + * @hash_order: Order of the hash table used to hold the reference objects. + * + * This is typically called by the file_ops::open function. + */ + +extern struct ttm_object_file *ttm_object_file_init(struct ttm_object_device + *tdev, + unsigned int hash_order); + +/** + * ttm_object_file_release - release data held by a ttm_object_file + * + * @p_tfile: Pointer to pointer to the ttm_object_file object to release. + * *p_tfile will be set to NULL by this function. + * + * Releases all data associated by a ttm_object_file. + * Typically called from file_ops::release. The caller must + * ensure that there are no concurrent users of tfile. + */ + +extern void ttm_object_file_release(struct ttm_object_file **p_tfile); + +/** + * ttm_object device init - initialize a struct ttm_object_device + * + * @hash_order: Order of hash table used to hash the base objects. + * + * This function is typically called on device initialization to prepare + * data structures needed for ttm base and ref objects. + */ + +extern struct ttm_object_device *ttm_object_device_init + (struct ttm_mem_global *mem_glob, unsigned int hash_order); + +/** + * ttm_object_device_release - release data held by a ttm_object_device + * + * @p_tdev: Pointer to pointer to the ttm_object_device object to release. + * *p_tdev will be set to NULL by this function. + * + * Releases all data associated by a ttm_object_device. + * Typically called from driver::unload before the destruction of the + * device private data structure. + */ + +extern void ttm_object_device_release(struct ttm_object_device **p_tdev); + +#endif |