diff options
Diffstat (limited to 'drivers/staging/gma500/psb_ttm_fence_driver.h')
| -rw-r--r-- | drivers/staging/gma500/psb_ttm_fence_driver.h | 302 |
1 files changed, 0 insertions, 302 deletions
diff --git a/drivers/staging/gma500/psb_ttm_fence_driver.h b/drivers/staging/gma500/psb_ttm_fence_driver.h deleted file mode 100644 index c35c569fa3f0..000000000000 --- a/drivers/staging/gma500/psb_ttm_fence_driver.h +++ /dev/null @@ -1,302 +0,0 @@ -/************************************************************************** - * - * Copyright (c) 2006-2008 Tungsten Graphics, Inc., Cedar Park, TX., USA - * All Rights Reserved. - * Copyright (c) 2009 VMware, Inc., Palo Alto, CA., USA - * All Rights Reserved. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. - * - **************************************************************************/ -/* - * Authors: Thomas Hellstrom <thomas-at-tungstengraphics-dot-com> - */ -#ifndef _TTM_FENCE_DRIVER_H_ -#define _TTM_FENCE_DRIVER_H_ - -#include <linux/kref.h> -#include <linux/spinlock.h> -#include <linux/wait.h> -#include "psb_ttm_fence_api.h" -#include "ttm/ttm_memory.h" - -/** @file ttm_fence_driver.h - * - * Definitions needed for a driver implementing the - * ttm_fence subsystem. - */ - -/** - * struct ttm_fence_class_manager: - * - * @wrap_diff: Sequence difference to catch 32-bit wrapping. - * if (seqa - seqb) > @wrap_diff, then seqa < seqb. - * @flush_diff: Sequence difference to trigger fence flush. - * if (cur_seq - seqa) > @flush_diff, then consider fence object with - * seqa as old an needing a flush. - * @sequence_mask: Mask of valid bits in a fence sequence. - * @lock: Lock protecting this struct as well as fence objects - * associated with this struct. - * @ring: Circular sequence-ordered list of fence objects. - * @pending_flush: Fence types currently needing a flush. - * @waiting_types: Fence types that are currently waited for. - * @fence_queue: Queue of waiters on fences belonging to this fence class. - * @highest_waiting_sequence: Sequence number of the fence with highest - * sequence number and that is waited for. - * @latest_queued_sequence: Sequence number of the fence latest queued - * on the ring. - */ - -struct ttm_fence_class_manager { - - /* - * Unprotected constant members. - */ - - uint32_t wrap_diff; - uint32_t flush_diff; - uint32_t sequence_mask; - - /* - * The rwlock protects this structure as well as - * the data in all fence objects belonging to this - * class. This should be OK as most fence objects are - * only read from once they're created. - */ - - rwlock_t lock; - struct list_head ring; - uint32_t pending_flush; - uint32_t waiting_types; - wait_queue_head_t fence_queue; - uint32_t highest_waiting_sequence; - uint32_t latest_queued_sequence; -}; - -/** - * struct ttm_fence_device - * - * @fence_class: Array of fence class managers. - * @num_classes: Array dimension of @fence_class. - * @count: Current number of fence objects for statistics. - * @driver: Driver struct. - * - * Provided in the driver interface so that the driver can derive - * from this struct for its driver_private, and accordingly - * access the driver_private from the fence driver callbacks. - * - * All members except "count" are initialized at creation and - * never touched after that. No protection needed. - * - * This struct is private to the fence implementation and to the fence - * driver callbacks, and may otherwise be used by drivers only to - * obtain the derived device_private object using container_of(). - */ - -struct ttm_fence_device { - struct ttm_mem_global *mem_glob; - struct ttm_fence_class_manager *fence_class; - uint32_t num_classes; - atomic_t count; - const struct ttm_fence_driver *driver; -}; - -/** - * struct ttm_fence_class_init - * - * @wrap_diff: Fence sequence number wrap indicator. If - * (sequence1 - sequence2) > @wrap_diff, then sequence1 is - * considered to be older than sequence2. - * @flush_diff: Fence sequence number flush indicator. - * If a non-completely-signaled fence has a fence sequence number - * sequence1 and (sequence1 - current_emit_sequence) > @flush_diff, - * the fence is considered too old and it will be flushed upon the - * next call of ttm_fence_flush_old(), to make sure no fences with - * stale sequence numbers remains unsignaled. @flush_diff should - * be sufficiently less than @wrap_diff. - * @sequence_mask: Mask with valid bits of the fence sequence - * number set to 1. - * - * This struct is used as input to ttm_fence_device_init. - */ - -struct ttm_fence_class_init { - uint32_t wrap_diff; - uint32_t flush_diff; - uint32_t sequence_mask; -}; - -/** - * struct ttm_fence_driver - * - * @has_irq: Called by a potential waiter. Should return 1 if a - * fence object with indicated parameters is expected to signal - * automatically, and 0 if the fence implementation needs to - * repeatedly call @poll to make it signal. - * @emit: Make sure a fence with the given parameters is - * present in the indicated command stream. Return its sequence number - * in "breadcrumb". - * @poll: Check and report sequences of the given "fence_class" - * that have signaled "types" - * @flush: Make sure that the types indicated by the bitfield - * ttm_fence_class_manager::pending_flush will eventually - * signal. These bits have been put together using the - * result from the needed_flush function described below. - * @needed_flush: Given the fence_class and fence_types indicated by - * "fence", and the last received fence sequence of this - * fence class, indicate what types need a fence flush to - * signal. Return as a bitfield. - * @wait: Set to non-NULL if the driver wants to override the fence - * wait implementation. Return 0 on success, -EBUSY on failure, - * and -ERESTART if interruptible and a signal is pending. - * @signaled: Driver callback that is called whenever a - * ttm_fence_object::signaled_types has changed status. - * This function is called from atomic context, - * with the ttm_fence_class_manager::lock held in write mode. - * @lockup: Driver callback that is called whenever a wait has exceeded - * the lifetime of a fence object. - * If there is a GPU lockup, - * this function should, if possible, reset the GPU, - * call the ttm_fence_handler with an error status, and - * return. If no lockup was detected, simply extend the - * fence timeout_jiffies and return. The driver might - * want to protect the lockup check with a mutex and cache a - * non-locked-up status for a while to avoid an excessive - * amount of lockup checks from every waiting thread. - */ - -struct ttm_fence_driver { - bool (*has_irq) (struct ttm_fence_device *fdev, - uint32_t fence_class, uint32_t flags); - int (*emit) (struct ttm_fence_device *fdev, - uint32_t fence_class, - uint32_t flags, - uint32_t *breadcrumb, unsigned long *timeout_jiffies); - void (*flush) (struct ttm_fence_device *fdev, uint32_t fence_class); - void (*poll) (struct ttm_fence_device *fdev, - uint32_t fence_class, uint32_t types); - uint32_t(*needed_flush) - (struct ttm_fence_object *fence); - int (*wait) (struct ttm_fence_object *fence, bool lazy, - bool interruptible, uint32_t mask); - void (*signaled) (struct ttm_fence_object *fence); - void (*lockup) (struct ttm_fence_object *fence, uint32_t fence_types); -}; - -/** - * function ttm_fence_device_init - * - * @num_classes: Number of fence classes for this fence implementation. - * @mem_global: Pointer to the global memory accounting info. - * @fdev: Pointer to an uninitialised struct ttm_fence_device. - * @init: Array of initialization info for each fence class. - * @replicate_init: Use the first @init initialization info for all classes. - * @driver: Driver callbacks. - * - * Initialize a struct ttm_fence_driver structure. Returns -ENOMEM if - * out-of-memory. Otherwise returns 0. - */ -extern int -ttm_fence_device_init(int num_classes, - struct ttm_mem_global *mem_glob, - struct ttm_fence_device *fdev, - const struct ttm_fence_class_init *init, - bool replicate_init, - const struct ttm_fence_driver *driver); - -/** - * function ttm_fence_device_release - * - * @fdev: Pointer to the fence device. - * - * Release all resources held by a fence device. Note that before - * this function is called, the caller must have made sure all fence - * objects belonging to this fence device are completely signaled. - */ - -extern void ttm_fence_device_release(struct ttm_fence_device *fdev); - -/** - * ttm_fence_handler - the fence handler. - * - * @fdev: Pointer to the fence device. - * @fence_class: Fence class that signals. - * @sequence: Signaled sequence. - * @type: Types that signal. - * @error: Error from the engine. - * - * This function signals all fences with a sequence previous to the - * @sequence argument, and belonging to @fence_class. The signaled fence - * types are provided in @type. If error is non-zero, the error member - * of the fence with sequence = @sequence is set to @error. This value - * may be reported back to user-space, indicating, for example an illegal - * 3D command or illegal mpeg data. - * - * This function is typically called from the driver::poll method when the - * command sequence preceding the fence marker has executed. It should be - * called with the ttm_fence_class_manager::lock held in write mode and - * may be called from interrupt context. - */ - -extern void -ttm_fence_handler(struct ttm_fence_device *fdev, - uint32_t fence_class, - uint32_t sequence, uint32_t type, uint32_t error); - -/** - * ttm_fence_driver_from_dev - * - * @fdev: The ttm fence device. - * - * Returns a pointer to the fence driver struct. - */ - -static inline const struct ttm_fence_driver *ttm_fence_driver_from_dev( - struct ttm_fence_device *fdev) -{ - return fdev->driver; -} - -/** - * ttm_fence_driver - * - * @fence: Pointer to a ttm fence object. - * - * Returns a pointer to the fence driver struct. - */ - -static inline const struct ttm_fence_driver *ttm_fence_driver(struct - ttm_fence_object - *fence) -{ - return ttm_fence_driver_from_dev(fence->fdev); -} - -/** - * ttm_fence_fc - * - * @fence: Pointer to a ttm fence object. - * - * Returns a pointer to the struct ttm_fence_class_manager for the - * fence class of @fence. - */ - -static inline struct ttm_fence_class_manager *ttm_fence_fc(struct - ttm_fence_object - *fence) -{ - return &fence->fdev->fence_class[fence->fence_class]; -} - -#endif |