| /* -*- mode: c; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */ |
| /* vi: set ts=8 sw=8 sts=8: */ |
| /*************************************************************************/ /*! |
| @File |
| @Title PowerVR Linux fence interface |
| @Codingstyle LinuxKernel |
| @Copyright Copyright (c) Imagination Technologies Ltd. All Rights Reserved |
| @License Dual MIT/GPLv2 |
| |
| The contents of this file are subject to the MIT license as set out below. |
| |
| 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, sublicense, 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 shall be included in |
| all copies or substantial portions of the Software. |
| |
| Alternatively, the contents of this file may be used under the terms of |
| the GNU General Public License Version 2 ("GPL") in which case the provisions |
| of GPL are applicable instead of those above. |
| |
| If you wish to allow use of your version of this file only under the terms of |
| GPL, and not to allow others to use your version of this file under the terms |
| of the MIT license, indicate your decision by deleting the provisions above |
| and replace them with the notice and other provisions required by GPL as set |
| out in the file called "GPL-COPYING" included in this distribution. If you do |
| not delete the provisions above, a recipient may use your version of this file |
| under the terms of either the MIT license or GPL. |
| |
| This License is also included in this distribution in the file called |
| "MIT-COPYING". |
| |
| EXCEPT AS OTHERWISE STATED IN A NEGOTIATED AGREEMENT: (A) 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 NONINFRINGEMENT; AND (B) IN NO EVENT SHALL THE AUTHORS OR |
| COPYRIGHT HOLDERS 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. |
| */ /**************************************************************************/ |
| |
| #if !defined(__PVR_FENCE_H__) |
| #define __PVR_FENCE_H__ |
| |
| #include <linux/version.h> |
| |
| #if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 17, 0)) |
| static inline void pvr_fence_cleanup(void) |
| { |
| } |
| #else |
| #include "pvr_linux_fence.h" |
| #include <linux/list.h> |
| #include <linux/spinlock.h> |
| #include <linux/workqueue.h> |
| #include <linux/completion.h> |
| |
| struct _SYNC_CHECKPOINT_CONTEXT; |
| struct _SYNC_CHECKPOINT; |
| |
| /** |
| * pvr_fence_context - PVR fence context used to create and manage PVR fences |
| * @lock: protects the context and fences created on the context |
| * @name: fence context name (used for debugging) |
| * @dbg_request_handle: handle for callback used to dump debug data |
| * @sync_checkpoint_context: context used to create services sync checkpoints |
| * @fence_context: fence context with which to associate fences |
| * @fence_seqno: sequence number to use for the next fence |
| * @fence_wq: work queue for signalled fence work |
| * @check_status_work: work item used to inform services when a foreign fence |
| * has signalled |
| * @cmd_complete_handle: handle for callback used to signal fences when fence |
| * syncs are met |
| * @list_lock: protects the active and active foreign lists |
| * @signal_list: list of fences waiting to be signalled |
| * @fence_list: list of fences (used for debugging) |
| * @deferred_free_list: list of fences that we will free when we are no longer |
| * holding spinlocks. The frees get implemented when an update fence is |
| * signalled or the context is freed. |
| */ |
| struct pvr_fence_context { |
| spinlock_t lock; |
| char name[32]; |
| void *dbg_request_handle; |
| |
| struct _SYNC_CHECKPOINT_CONTEXT *sync_checkpoint_context; |
| u64 fence_context; |
| atomic_t fence_seqno; |
| |
| struct workqueue_struct *fence_wq; |
| struct work_struct check_status_work; |
| |
| void *cmd_complete_handle; |
| |
| spinlock_t list_lock; |
| struct list_head signal_list; |
| struct list_head fence_list; |
| struct list_head deferred_free_list; |
| |
| struct kref kref; |
| struct delayed_work destroy_work; |
| unsigned int destroy_retries_left; |
| unsigned int destroy_delay_ms; |
| struct completion *global_complete; |
| }; |
| |
| /** |
| * pvr_fence - PVR fence that represents both native and foreign fences |
| * @base: fence structure |
| * @fctx: fence context on which this fence was created |
| * @name: fence name (used for debugging) |
| * @fence: pointer to base fence structure or foreign fence |
| * @sync_checkpoint: services sync checkpoint used by hardware |
| * @fence_head: entry on the context fence and deferred free list |
| * @signal_head: entry on the context signal list |
| * @cb: foreign fence callback to set the sync to signalled |
| */ |
| struct pvr_fence { |
| struct dma_fence base; |
| struct pvr_fence_context *fctx; |
| char name[32]; |
| |
| struct dma_fence *fence; |
| struct _SYNC_CHECKPOINT *sync_checkpoint; |
| |
| struct list_head fence_head; |
| struct list_head signal_head; |
| struct dma_fence_cb cb; |
| }; |
| |
| extern const struct dma_fence_ops pvr_fence_ops; |
| extern const struct dma_fence_ops pvr_fence_foreign_ops; |
| |
| static inline bool is_our_fence(struct pvr_fence_context *fctx, |
| struct dma_fence *fence) |
| { |
| return (fence->context == fctx->fence_context); |
| } |
| |
| static inline bool is_pvr_fence(struct dma_fence *fence) |
| { |
| return ((fence->ops == &pvr_fence_ops) || |
| (fence->ops == &pvr_fence_foreign_ops)); |
| } |
| |
| static inline struct pvr_fence *to_pvr_fence(struct dma_fence *fence) |
| { |
| if (is_pvr_fence(fence)) |
| return container_of(fence, struct pvr_fence, base); |
| |
| return NULL; |
| } |
| |
| struct pvr_fence_context *pvr_fence_context_create(void *dev_cookie, |
| struct workqueue_struct *fence_status_wq, |
| const char *name); |
| struct pvr_fence_context *pvr_global_fence_context_create(void *dev_cookie, |
| struct workqueue_struct *fence_status_wq, |
| const char *name); |
| void pvr_fence_context_destroy(struct pvr_fence_context *fctx); |
| void pvr_context_value_str(struct pvr_fence_context *fctx, char *str, int size); |
| |
| struct pvr_fence *pvr_fence_create(struct pvr_fence_context *fctx, |
| int timeline_fd, const char *name); |
| struct pvr_fence *pvr_fence_create_from_fence(struct pvr_fence_context *fctx, |
| struct dma_fence *fence, |
| const char *name); |
| void pvr_fence_destroy(struct pvr_fence *pvr_fence); |
| int pvr_fence_sw_signal(struct pvr_fence *pvr_fence); |
| int pvr_fence_sw_error(struct pvr_fence *pvr_fence); |
| |
| int pvr_fence_get_checkpoints(struct pvr_fence **pvr_fences, u32 nr_fences, |
| struct _SYNC_CHECKPOINT **fence_checkpoints); |
| struct _SYNC_CHECKPOINT *pvr_fence_get_checkpoint(struct pvr_fence *update_fence); |
| |
| void pvr_fence_context_signal_fences_nohw(void *data); |
| |
| u32 pvr_fence_dump_info_on_stalled_ufos(struct pvr_fence_context *fctx, |
| u32 nr_ufos, |
| u32 *vaddrs); |
| |
| static inline void pvr_fence_cleanup(void) |
| { |
| /* |
| * Ensure any outstanding work needed to destroy PVR fence |
| * contexts has completed, by flushing the global workqueue. |
| */ |
| flush_scheduled_work(); |
| } |
| |
| #if defined(PVR_FENCE_DEBUG) |
| #define PVR_FENCE_CTX_TRACE(c, fmt, ...) \ |
| do { \ |
| struct pvr_fence_context *__fctx = (c); \ |
| pr_err("c %llu: (PVR) " fmt, (u64) __fctx->fence_context, \ |
| ## __VA_ARGS__); \ |
| } while (0) |
| #else |
| #define PVR_FENCE_CTX_TRACE(c, fmt, ...) |
| #endif |
| |
| #define PVR_FENCE_CTX_WARN(c, fmt, ...) \ |
| do { \ |
| struct pvr_fence_context *__fctx = (c); \ |
| pr_warn("c %llu: (PVR) " fmt, (u64) __fctx->fence_context, \ |
| ## __VA_ARGS__); \ |
| } while (0) |
| |
| #define PVR_FENCE_CTX_ERR(c, fmt, ...) \ |
| do { \ |
| struct pvr_fence_context *__fctx = (c); \ |
| pr_err("c %llu: (PVR) " fmt, (u64) __fctx->fence_context, \ |
| ## __VA_ARGS__); \ |
| } while (0) |
| |
| #if defined(PVR_FENCE_DEBUG) |
| #define PVR_FENCE_TRACE(f, fmt, ...) \ |
| DMA_FENCE_ERR(f, "(PVR) " fmt, ## __VA_ARGS__) |
| #else |
| #define PVR_FENCE_TRACE(f, fmt, ...) |
| #endif |
| |
| #define PVR_FENCE_WARN(f, fmt, ...) \ |
| DMA_FENCE_WARN(f, "(PVR) " fmt, ## __VA_ARGS__) |
| |
| #define PVR_FENCE_ERR(f, fmt, ...) \ |
| DMA_FENCE_ERR(f, "(PVR) " fmt, ## __VA_ARGS__) |
| |
| #endif /* (LINUX_VERSION_CODE < KERNEL_VERSION(3, 17, 0)) */ |
| #endif /* !defined(__PVR_FENCE_H__) */ |