diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/drm/drmP.h | 3 | ||||
| -rw-r--r-- | include/linux/component.h | 7 | ||||
| -rw-r--r-- | include/linux/device.h | 2 | ||||
| -rw-r--r-- | include/linux/dma-buf.h | 21 | ||||
| -rw-r--r-- | include/linux/fence.h | 360 | ||||
| -rw-r--r-- | include/linux/firmware.h | 15 | ||||
| -rw-r--r-- | include/linux/platform_device.h | 1 | ||||
| -rw-r--r-- | include/linux/reservation.h | 82 | ||||
| -rw-r--r-- | include/linux/seqno-fence.h | 116 | ||||
| -rw-r--r-- | include/trace/events/fence.h | 128 |
10 files changed, 722 insertions, 13 deletions
diff --git a/include/drm/drmP.h b/include/drm/drmP.h index 8af71a8e2c00..e41f17ea1f13 100644 --- a/include/drm/drmP.h +++ b/include/drm/drmP.h @@ -83,6 +83,7 @@ struct drm_device; struct device_node; struct videomode; +struct reservation_object; #include <drm/drm_os_linux.h> #include <drm/drm_hashtab.h> @@ -923,6 +924,8 @@ struct drm_driver { /* low-level interface used by drm_gem_prime_{import,export} */ int (*gem_prime_pin)(struct drm_gem_object *obj); void (*gem_prime_unpin)(struct drm_gem_object *obj); + struct reservation_object * (*gem_prime_res_obj)( + struct drm_gem_object *obj); struct sg_table *(*gem_prime_get_sg_table)(struct drm_gem_object *obj); struct drm_gem_object *(*gem_prime_import_sg_table)( struct drm_device *dev, size_t size, diff --git a/include/linux/component.h b/include/linux/component.h index 68870182ca1e..c00dcc302611 100644 --- a/include/linux/component.h +++ b/include/linux/component.h @@ -29,4 +29,11 @@ void component_master_del(struct device *, int component_master_add_child(struct master *master, int (*compare)(struct device *, void *), void *compare_data); +struct component_match; + +int component_master_add_with_match(struct device *, + const struct component_master_ops *, struct component_match *); +void component_match_add(struct device *, struct component_match **, + int (*compare)(struct device *, void *), void *compare_data); + #endif diff --git a/include/linux/device.h b/include/linux/device.h index af424acd393d..921fa0a74df6 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -631,8 +631,6 @@ extern unsigned long devm_get_free_pages(struct device *dev, extern void devm_free_pages(struct device *dev, unsigned long addr); void __iomem *devm_ioremap_resource(struct device *dev, struct resource *res); -void __iomem *devm_request_and_ioremap(struct device *dev, - struct resource *res); /* allows to add/remove a custom action to devres stack */ int devm_add_action(struct device *dev, void (*action)(void *), void *data); diff --git a/include/linux/dma-buf.h b/include/linux/dma-buf.h index f886985a28b2..694e1fe1c4b4 100644 --- a/include/linux/dma-buf.h +++ b/include/linux/dma-buf.h @@ -30,6 +30,8 @@ #include <linux/list.h> #include <linux/dma-mapping.h> #include <linux/fs.h> +#include <linux/fence.h> +#include <linux/wait.h> struct device; struct dma_buf; @@ -115,6 +117,7 @@ struct dma_buf_ops { * @exp_name: name of the exporter; useful for debugging. * @list_node: node for dma_buf accounting and debugging. * @priv: exporter specific private data for this buffer object. + * @resv: reservation object linked to this dma-buf */ struct dma_buf { size_t size; @@ -128,6 +131,17 @@ struct dma_buf { const char *exp_name; struct list_head list_node; void *priv; + struct reservation_object *resv; + + /* poll support */ + wait_queue_head_t poll; + + struct dma_buf_poll_cb_t { + struct fence_cb cb; + wait_queue_head_t *poll; + + unsigned long active; + } cb_excl, cb_shared; }; /** @@ -168,10 +182,11 @@ void dma_buf_detach(struct dma_buf *dmabuf, struct dma_buf_attachment *dmabuf_attach); struct dma_buf *dma_buf_export_named(void *priv, const struct dma_buf_ops *ops, - size_t size, int flags, const char *); + size_t size, int flags, const char *, + struct reservation_object *); -#define dma_buf_export(priv, ops, size, flags) \ - dma_buf_export_named(priv, ops, size, flags, KBUILD_MODNAME) +#define dma_buf_export(priv, ops, size, flags, resv) \ + dma_buf_export_named(priv, ops, size, flags, KBUILD_MODNAME, resv) int dma_buf_fd(struct dma_buf *dmabuf, int flags); struct dma_buf *dma_buf_get(int fd); diff --git a/include/linux/fence.h b/include/linux/fence.h new file mode 100644 index 000000000000..d174585b874b --- /dev/null +++ b/include/linux/fence.h @@ -0,0 +1,360 @@ +/* + * Fence mechanism for dma-buf to allow for asynchronous dma access + * + * Copyright (C) 2012 Canonical Ltd + * Copyright (C) 2012 Texas Instruments + * + * Authors: + * Rob Clark <robdclark@gmail.com> + * Maarten Lankhorst <maarten.lankhorst@canonical.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + * + * This program is distributed in the hope that 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. + */ + +#ifndef __LINUX_FENCE_H +#define __LINUX_FENCE_H + +#include <linux/err.h> +#include <linux/wait.h> +#include <linux/list.h> +#include <linux/bitops.h> +#include <linux/kref.h> +#include <linux/sched.h> +#include <linux/printk.h> +#include <linux/rcupdate.h> + +struct fence; +struct fence_ops; +struct fence_cb; + +/** + * struct fence - software synchronization primitive + * @refcount: refcount for this fence + * @ops: fence_ops associated with this fence + * @rcu: used for releasing fence with kfree_rcu + * @cb_list: list of all callbacks to call + * @lock: spin_lock_irqsave used for locking + * @context: execution context this fence belongs to, returned by + * fence_context_alloc() + * @seqno: the sequence number of this fence inside the execution context, + * can be compared to decide which fence would be signaled later. + * @flags: A mask of FENCE_FLAG_* defined below + * @timestamp: Timestamp when the fence was signaled. + * @status: Optional, only valid if < 0, must be set before calling + * fence_signal, indicates that the fence has completed with an error. + * + * the flags member must be manipulated and read using the appropriate + * atomic ops (bit_*), so taking the spinlock will not be needed most + * of the time. + * + * FENCE_FLAG_SIGNALED_BIT - fence is already signaled + * FENCE_FLAG_ENABLE_SIGNAL_BIT - enable_signaling might have been called* + * FENCE_FLAG_USER_BITS - start of the unused bits, can be used by the + * implementer of the fence for its own purposes. Can be used in different + * ways by different fence implementers, so do not rely on this. + * + * *) Since atomic bitops are used, this is not guaranteed to be the case. + * Particularly, if the bit was set, but fence_signal was called right + * before this bit was set, it would have been able to set the + * FENCE_FLAG_SIGNALED_BIT, before enable_signaling was called. + * Adding a check for FENCE_FLAG_SIGNALED_BIT after setting + * FENCE_FLAG_ENABLE_SIGNAL_BIT closes this race, and makes sure that + * after fence_signal was called, any enable_signaling call will have either + * been completed, or never called at all. + */ +struct fence { + struct kref refcount; + const struct fence_ops *ops; + struct rcu_head rcu; + struct list_head cb_list; + spinlock_t *lock; + unsigned context, seqno; + unsigned long flags; + ktime_t timestamp; + int status; +}; + +enum fence_flag_bits { + FENCE_FLAG_SIGNALED_BIT, + FENCE_FLAG_ENABLE_SIGNAL_BIT, + FENCE_FLAG_USER_BITS, /* must always be last member */ +}; + +typedef void (*fence_func_t)(struct fence *fence, struct fence_cb *cb); + +/** + * struct fence_cb - callback for fence_add_callback + * @node: used by fence_add_callback to append this struct to fence::cb_list + * @func: fence_func_t to call + * + * This struct will be initialized by fence_add_callback, additional + * data can be passed along by embedding fence_cb in another struct. + */ +struct fence_cb { + struct list_head node; + fence_func_t func; +}; + +/** + * struct fence_ops - operations implemented for fence + * @get_driver_name: returns the driver name. + * @get_timeline_name: return the name of the context this fence belongs to. + * @enable_signaling: enable software signaling of fence. + * @signaled: [optional] peek whether the fence is signaled, can be null. + * @wait: custom wait implementation, or fence_default_wait. + * @release: [optional] called on destruction of fence, can be null + * @fill_driver_data: [optional] callback to fill in free-form debug info + * Returns amount of bytes filled, or -errno. + * @fence_value_str: [optional] fills in the value of the fence as a string + * @timeline_value_str: [optional] fills in the current value of the timeline + * as a string + * + * Notes on enable_signaling: + * For fence implementations that have the capability for hw->hw + * signaling, they can implement this op to enable the necessary + * irqs, or insert commands into cmdstream, etc. This is called + * in the first wait() or add_callback() path to let the fence + * implementation know that there is another driver waiting on + * the signal (ie. hw->sw case). + * + * This function can be called called from atomic context, but not + * from irq context, so normal spinlocks can be used. + * + * A return value of false indicates the fence already passed, + * or some failure occured that made it impossible to enable + * signaling. True indicates succesful enabling. + * + * fence->status may be set in enable_signaling, but only when false is + * returned. + * + * Calling fence_signal before enable_signaling is called allows + * for a tiny race window in which enable_signaling is called during, + * before, or after fence_signal. To fight this, it is recommended + * that before enable_signaling returns true an extra reference is + * taken on the fence, to be released when the fence is signaled. + * This will mean fence_signal will still be called twice, but + * the second time will be a noop since it was already signaled. + * + * Notes on signaled: + * May set fence->status if returning true. + * + * Notes on wait: + * Must not be NULL, set to fence_default_wait for default implementation. + * the fence_default_wait implementation should work for any fence, as long + * as enable_signaling works correctly. + * + * Must return -ERESTARTSYS if the wait is intr = true and the wait was + * interrupted, and remaining jiffies if fence has signaled, or 0 if wait + * timed out. Can also return other error values on custom implementations, + * which should be treated as if the fence is signaled. For example a hardware + * lockup could be reported like that. + * + * Notes on release: + * Can be NULL, this function allows additional commands to run on + * destruction of the fence. Can be called from irq context. + * If pointer is set to NULL, kfree will get called instead. + */ + +struct fence_ops { + const char * (*get_driver_name)(struct fence *fence); + const char * (*get_timeline_name)(struct fence *fence); + bool (*enable_signaling)(struct fence *fence); + bool (*signaled)(struct fence *fence); + signed long (*wait)(struct fence *fence, bool intr, signed long timeout); + void (*release)(struct fence *fence); + + int (*fill_driver_data)(struct fence *fence, void *data, int size); + void (*fence_value_str)(struct fence *fence, char *str, int size); + void (*timeline_value_str)(struct fence *fence, char *str, int size); +}; + +void fence_init(struct fence *fence, const struct fence_ops *ops, + spinlock_t *lock, unsigned context, unsigned seqno); + +void fence_release(struct kref *kref); +void fence_free(struct fence *fence); + +/** + * fence_get - increases refcount of the fence + * @fence: [in] fence to increase refcount of + * + * Returns the same fence, with refcount increased by 1. + */ +static inline struct fence *fence_get(struct fence *fence) +{ + if (fence) + kref_get(&fence->refcount); + return fence; +} + +/** + * fence_get_rcu - get a fence from a reservation_object_list with rcu read lock + * @fence: [in] fence to increase refcount of + * + * Function returns NULL if no refcount could be obtained, or the fence. + */ +static inline struct fence *fence_get_rcu(struct fence *fence) +{ + if (kref_get_unless_zero(&fence->refcount)) + return fence; + else + return NULL; +} + +/** + * fence_put - decreases refcount of the fence + * @fence: [in] fence to reduce refcount of + */ +static inline void fence_put(struct fence *fence) +{ + if (fence) + kref_put(&fence->refcount, fence_release); +} + +int fence_signal(struct fence *fence); +int fence_signal_locked(struct fence *fence); +signed long fence_default_wait(struct fence *fence, bool intr, signed long timeout); +int fence_add_callback(struct fence *fence, struct fence_cb *cb, + fence_func_t func); +bool fence_remove_callback(struct fence *fence, struct fence_cb *cb); +void fence_enable_sw_signaling(struct fence *fence); + +/** + * fence_is_signaled_locked - Return an indication if the fence is signaled yet. + * @fence: [in] the fence to check + * + * Returns true if the fence was already signaled, false if not. Since this + * function doesn't enable signaling, it is not guaranteed to ever return + * true if fence_add_callback, fence_wait or fence_enable_sw_signaling + * haven't been called before. + * + * This function requires fence->lock to be held. + */ +static inline bool +fence_is_signaled_locked(struct fence *fence) +{ + if (test_bit(FENCE_FLAG_SIGNALED_BIT, &fence->flags)) + return true; + + if (fence->ops->signaled && fence->ops->signaled(fence)) { + fence_signal_locked(fence); + return true; + } + + return false; +} + +/** + * fence_is_signaled - Return an indication if the fence is signaled yet. + * @fence: [in] the fence to check + * + * Returns true if the fence was already signaled, false if not. Since this + * function doesn't enable signaling, it is not guaranteed to ever return + * true if fence_add_callback, fence_wait or fence_enable_sw_signaling + * haven't been called before. + * + * It's recommended for seqno fences to call fence_signal when the + * operation is complete, it makes it possible to prevent issues from + * wraparound between time of issue and time of use by checking the return + * value of this function before calling hardware-specific wait instructions. + */ +static inline bool +fence_is_signaled(struct fence *fence) +{ + if (test_bit(FENCE_FLAG_SIGNALED_BIT, &fence->flags)) + return true; + + if (fence->ops->signaled && fence->ops->signaled(fence)) { + fence_signal(fence); + return true; + } + + return false; +} + +/** + * fence_later - return the chronologically later fence + * @f1: [in] the first fence from the same context + * @f2: [in] the second fence from the same context + * + * Returns NULL if both fences are signaled, otherwise the fence that would be + * signaled last. Both fences must be from the same context, since a seqno is + * not re-used across contexts. + */ +static inline struct fence *fence_later(struct fence *f1, struct fence *f2) +{ + if (WARN_ON(f1->context != f2->context)) + return NULL; + + /* + * can't check just FENCE_FLAG_SIGNALED_BIT here, it may never have been + * set if enable_signaling wasn't called, and enabling that here is + * overkill. + */ + if (f2->seqno - f1->seqno <= INT_MAX) + return fence_is_signaled(f2) ? NULL : f2; + else + return fence_is_signaled(f1) ? NULL : f1; +} + +signed long fence_wait_timeout(struct fence *, bool intr, signed long timeout); + + +/** + * fence_wait - sleep until the fence gets signaled + * @fence: [in] the fence to wait on + * @intr: [in] if true, do an interruptible wait + * + * This function will return -ERESTARTSYS if interrupted by a signal, + * or 0 if the fence was signaled. Other error values may be + * returned on custom implementations. + * + * Performs a synchronous wait on this fence. It is assumed the caller + * directly or indirectly holds a reference to the fence, otherwise the + * fence might be freed before return, resulting in undefined behavior. + */ +static inline signed long fence_wait(struct fence *fence, bool intr) +{ + signed long ret; + + /* Since fence_wait_timeout cannot timeout with + * MAX_SCHEDULE_TIMEOUT, only valid return values are + * -ERESTARTSYS and MAX_SCHEDULE_TIMEOUT. + */ + ret = fence_wait_timeout(fence, intr, MAX_SCHEDULE_TIMEOUT); + + return ret < 0 ? ret : 0; +} + +unsigned fence_context_alloc(unsigned num); + +#define FENCE_TRACE(f, fmt, args...) \ + do { \ + struct fence *__ff = (f); \ + if (config_enabled(CONFIG_FENCE_TRACE)) \ + pr_info("f %u#%u: " fmt, \ + __ff->context, __ff->seqno, ##args); \ + } while (0) + +#define FENCE_WARN(f, fmt, args...) \ + do { \ + struct fence *__ff = (f); \ + pr_warn("f %u#%u: " fmt, __ff->context, __ff->seqno, \ + ##args); \ + } while (0) + +#define FENCE_ERR(f, fmt, args...) \ + do { \ + struct fence *__ff = (f); \ + pr_err("f %u#%u: " fmt, __ff->context, __ff->seqno, \ + ##args); \ + } while (0) + +#endif /* __LINUX_FENCE_H */ diff --git a/include/linux/firmware.h b/include/linux/firmware.h index 59529330efd6..5c41c5e75b5c 100644 --- a/include/linux/firmware.h +++ b/include/linux/firmware.h @@ -45,6 +45,8 @@ int request_firmware_nowait( struct module *module, bool uevent, const char *name, struct device *device, gfp_t gfp, void *context, void (*cont)(const struct firmware *fw, void *context)); +int request_firmware_direct(const struct firmware **fw, const char *name, + struct device *device); void release_firmware(const struct firmware *fw); #else @@ -66,13 +68,12 @@ static inline void release_firmware(const struct firmware *fw) { } -#endif +static inline int request_firmware_direct(const struct firmware **fw, + const char *name, + struct device *device) +{ + return -EINVAL; +} -#ifdef CONFIG_FW_LOADER_USER_HELPER -int request_firmware_direct(const struct firmware **fw, const char *name, - struct device *device); -#else -#define request_firmware_direct request_firmware #endif - #endif diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h index 16f6654082dd..153d303af7eb 100644 --- a/include/linux/platform_device.h +++ b/include/linux/platform_device.h @@ -28,6 +28,7 @@ struct platform_device { struct resource *resource; const struct platform_device_id *id_entry; + char *driver_override; /* Driver name to force a match */ /* MFD cell pointer */ struct mfd_cell *mfd_cell; diff --git a/include/linux/reservation.h b/include/linux/reservation.h index 813dae960ebd..5a0b64cf68b4 100644 --- a/include/linux/reservation.h +++ b/include/linux/reservation.h @@ -6,7 +6,7 @@ * Copyright (C) 2012 Texas Instruments * * Authors: - * Rob Clark <rob.clark@linaro.org> + * Rob Clark <robdclark@gmail.com> * Maarten Lankhorst <maarten.lankhorst@canonical.com> * Thomas Hellstrom <thellstrom-at-vmware-dot-com> * @@ -40,23 +40,103 @@ #define _LINUX_RESERVATION_H #include <linux/ww_mutex.h> +#include <linux/fence.h> +#include <linux/slab.h> +#include <linux/seqlock.h> +#include <linux/rcupdate.h> extern struct ww_class reservation_ww_class; +extern struct lock_class_key reservation_seqcount_class; +extern const char reservation_seqcount_string[]; + +struct reservation_object_list { + struct rcu_head rcu; + u32 shared_count, shared_max; + struct fence __rcu *shared[]; +}; struct reservation_object { struct ww_mutex lock; + seqcount_t seq; + + struct fence __rcu *fence_excl; + struct reservation_object_list __rcu *fence; + struct reservation_object_list *staged; }; +#define reservation_object_held(obj) lockdep_is_held(&(obj)->lock.base) +#define reservation_object_assert_held(obj) \ + lockdep_assert_held(&(obj)->lock.base) + static inline void reservation_object_init(struct reservation_object *obj) { ww_mutex_init(&obj->lock, &reservation_ww_class); + + __seqcount_init(&obj->seq, reservation_seqcount_string, &reservation_seqcount_class); + RCU_INIT_POINTER(obj->fence, NULL); + RCU_INIT_POINTER(obj->fence_excl, NULL); + obj->staged = NULL; } static inline void reservation_object_fini(struct reservation_object *obj) { + int i; + struct reservation_object_list *fobj; + struct fence *excl; + + /* + * This object should be dead and all references must have + * been released to it, so no need to be protected with rcu. + */ + excl = rcu_dereference_protected(obj->fence_excl, 1); + if (excl) + fence_put(excl); + + fobj = rcu_dereference_protected(obj->fence, 1); + if (fobj) { + for (i = 0; i < fobj->shared_count; ++i) + fence_put(rcu_dereference_protected(fobj->shared[i], 1)); + + kfree(fobj); + } + kfree(obj->staged); + ww_mutex_destroy(&obj->lock); } +static inline struct reservation_object_list * +reservation_object_get_list(struct reservation_object *obj) +{ + return rcu_dereference_protected(obj->fence, + reservation_object_held(obj)); +} + +static inline struct fence * +reservation_object_get_excl(struct reservation_object *obj) +{ + return rcu_dereference_protected(obj->fence_excl, + reservation_object_held(obj)); +} + +int reservation_object_reserve_shared(struct reservation_object *obj); +void reservation_object_add_shared_fence(struct reservation_object *obj, + struct fence *fence); + +void reservation_object_add_excl_fence(struct reservation_object *obj, + struct fence *fence); + +int reservation_object_get_fences_rcu(struct reservation_object *obj, + struct fence **pfence_excl, + unsigned *pshared_count, + struct fence ***pshared); + +long reservation_object_wait_timeout_rcu(struct reservation_object *obj, + bool wait_all, bool intr, + unsigned long timeout); + +bool reservation_object_test_signaled_rcu(struct reservation_object *obj, + bool test_all); + #endif /* _LINUX_RESERVATION_H */ diff --git a/include/linux/seqno-fence.h b/include/linux/seqno-fence.h new file mode 100644 index 000000000000..3d6003de4b0d --- /dev/null +++ b/include/linux/seqno-fence.h @@ -0,0 +1,116 @@ +/* + * seqno-fence, using a dma-buf to synchronize fencing + * + * Copyright (C) 2012 Texas Instruments + * Copyright (C) 2012 Canonical Ltd + * Authors: + * Rob Clark <robdclark@gmail.com> + * Maarten Lankhorst <maarten.lankhorst@canonical.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + * + * This program is distributed in the hope that 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. + */ + +#ifndef __LINUX_SEQNO_FENCE_H +#define __LINUX_SEQNO_FENCE_H + +#include <linux/fence.h> +#include <linux/dma-buf.h> + +enum seqno_fence_condition { + SEQNO_FENCE_WAIT_GEQUAL, + SEQNO_FENCE_WAIT_NONZERO +}; + +struct seqno_fence { + struct fence base; + + const struct fence_ops *ops; + struct dma_buf *sync_buf; + uint32_t seqno_ofs; + enum seqno_fence_condition condition; +}; + +extern const struct fence_ops seqno_fence_ops; + +/** + * to_seqno_fence - cast a fence to a seqno_fence + * @fence: fence to cast to a seqno_fence + * + * Returns NULL if the fence is not a seqno_fence, + * or the seqno_fence otherwise. + */ +static inline struct seqno_fence * +to_seqno_fence(struct fence *fence) +{ + if (fence->ops != &seqno_fence_ops) + return NULL; + return container_of(fence, struct seqno_fence, base); +} + +/** + * seqno_fence_init - initialize a seqno fence + * @fence: seqno_fence to initialize + * @lock: pointer to spinlock to use for fence + * @sync_buf: buffer containing the memory location to signal on + * @context: the execution context this fence is a part of + * @seqno_ofs: the offset within @sync_buf + * @seqno: the sequence # to signal on + * @ops: the fence_ops for operations on this seqno fence + * + * This function initializes a struct seqno_fence with passed parameters, + * and takes a reference on sync_buf which is released on fence destruction. + * + * A seqno_fence is a dma_fence which can complete in software when + * enable_signaling is called, but it also completes when + * (s32)((sync_buf)[seqno_ofs] - seqno) >= 0 is true + * + * The seqno_fence will take a refcount on the sync_buf until it's + * destroyed, but actual lifetime of sync_buf may be longer if one of the + * callers take a reference to it. + * + * Certain hardware have instructions to insert this type of wait condition + * in the command stream, so no intervention from software would be needed. + * This type of fence can be destroyed before completed, however a reference + * on the sync_buf dma-buf can be taken. It is encouraged to re-use the same + * dma-buf for sync_buf, since mapping or unmapping the sync_buf to the + * device's vm can be expensive. + * + * It is recommended for creators of seqno_fence to call fence_signal + * before destruction. This will prevent possible issues from wraparound at + * time of issue vs time of check, since users can check fence_is_signaled + * before submitting instructions for the hardware to wait on the fence. + * However, when ops.enable_signaling is not called, it doesn't have to be + * done as soon as possible, just before there's any real danger of seqno + * wraparound. + */ +static inline void +seqno_fence_init(struct seqno_fence *fence, spinlock_t *lock, + struct dma_buf *sync_buf, uint32_t context, + uint32_t seqno_ofs, uint32_t seqno, + enum seqno_fence_condition cond, + const struct fence_ops *ops) +{ + BUG_ON(!fence || !sync_buf || !ops); + BUG_ON(!ops->wait || !ops->enable_signaling || + !ops->get_driver_name || !ops->get_timeline_name); + + /* + * ops is used in fence_init for get_driver_name, so needs to be + * initialized first + */ + fence->ops = ops; + fence_init(&fence->base, &seqno_fence_ops, lock, context, seqno); + get_dma_buf(sync_buf); + fence->sync_buf = sync_buf; + fence->seqno_ofs = seqno_ofs; + fence->condition = cond; +} + +#endif /* __LINUX_SEQNO_FENCE_H */ diff --git a/include/trace/events/fence.h b/include/trace/events/fence.h new file mode 100644 index 000000000000..98feb1b82896 --- /dev/null +++ b/include/trace/events/fence.h @@ -0,0 +1,128 @@ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM fence + +#if !defined(_TRACE_FENCE_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_FENCE_H + +#include <linux/tracepoint.h> + +struct fence; + +TRACE_EVENT(fence_annotate_wait_on, + + /* fence: the fence waiting on f1, f1: the fence to be waited on. */ + TP_PROTO(struct fence *fence, struct fence *f1), + + TP_ARGS(fence, f1), + + TP_STRUCT__entry( + __string(driver, fence->ops->get_driver_name(fence)) + __string(timeline, fence->ops->get_driver_name(fence)) + __field(unsigned int, context) + __field(unsigned int, seqno) + + __string(waiting_driver, f1->ops->get_driver_name(f1)) + __string(waiting_timeline, f1->ops->get_timeline_name(f1)) + __field(unsigned int, waiting_context) + __field(unsigned int, waiting_seqno) + ), + + TP_fast_assign( + __assign_str(driver, fence->ops->get_driver_name(fence)) + __assign_str(timeline, fence->ops->get_timeline_name(fence)) + __entry->context = fence->context; + __entry->seqno = fence->seqno; + + __assign_str(waiting_driver, f1->ops->get_driver_name(f1)) + __assign_str(waiting_timeline, f1->ops->get_timeline_name(f1)) + __entry->waiting_context = f1->context; + __entry->waiting_seqno = f1->seqno; + + ), + + TP_printk("driver=%s timeline=%s context=%u seqno=%u " \ + "waits on driver=%s timeline=%s context=%u seqno=%u", + __get_str(driver), __get_str(timeline), __entry->context, + __entry->seqno, + __get_str(waiting_driver), __get_str(waiting_timeline), + __entry->waiting_context, __entry->waiting_seqno) +); + +DECLARE_EVENT_CLASS(fence, + + TP_PROTO(struct fence *fence), + + TP_ARGS(fence), + + TP_STRUCT__entry( + __string(driver, fence->ops->get_driver_name(fence)) + __string(timeline, fence->ops->get_timeline_name(fence)) + __field(unsigned int, context) + __field(unsigned int, seqno) + ), + + TP_fast_assign( + __assign_str(driver, fence->ops->get_driver_name(fence)) + __assign_str(timeline, fence->ops->get_timeline_name(fence)) + __entry->context = fence->context; + __entry->seqno = fence->seqno; + ), + + TP_printk("driver=%s timeline=%s context=%u seqno=%u", + __get_str(driver), __get_str(timeline), __entry->context, + __entry->seqno) +); + +DEFINE_EVENT(fence, fence_emit, + + TP_PROTO(struct fence *fence), + + TP_ARGS(fence) +); + +DEFINE_EVENT(fence, fence_init, + + TP_PROTO(struct fence *fence), + + TP_ARGS(fence) +); + +DEFINE_EVENT(fence, fence_destroy, + + TP_PROTO(struct fence *fence), + + TP_ARGS(fence) +); + +DEFINE_EVENT(fence, fence_enable_signal, + + TP_PROTO(struct fence *fence), + + TP_ARGS(fence) +); + +DEFINE_EVENT(fence, fence_signaled, + + TP_PROTO(struct fence *fence), + + TP_ARGS(fence) +); + +DEFINE_EVENT(fence, fence_wait_start, + + TP_PROTO(struct fence *fence), + + TP_ARGS(fence) +); + +DEFINE_EVENT(fence, fence_wait_end, + + TP_PROTO(struct fence *fence), + + TP_ARGS(fence) +); + +#endif /* _TRACE_FENCE_H */ + +/* This part must be outside protection */ +#include <trace/define_trace.h> |