diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_request.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_request.h | 212 |
1 files changed, 110 insertions, 102 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_request.h b/drivers/gpu/drm/i915/i915_gem_request.h index 974bd7bcc801..e2b077df2da0 100644 --- a/drivers/gpu/drm/i915/i915_gem_request.h +++ b/drivers/gpu/drm/i915/i915_gem_request.h @@ -25,11 +25,14 @@ #ifndef I915_GEM_REQUEST_H #define I915_GEM_REQUEST_H -#include <linux/fence.h> +#include <linux/dma-fence.h> #include "i915_gem.h" #include "i915_sw_fence.h" +struct drm_file; +struct drm_i915_gem_object; + struct intel_wait { struct rb_node node; struct task_struct *tsk; @@ -41,6 +44,33 @@ struct intel_signal_node { struct intel_wait wait; }; +struct i915_dependency { + struct i915_priotree *signaler; + struct list_head signal_link; + struct list_head wait_link; + struct list_head dfs_link; + unsigned long flags; +#define I915_DEPENDENCY_ALLOC BIT(0) +}; + +/* Requests exist in a complex web of interdependencies. Each request + * has to wait for some other request to complete before it is ready to be run + * (e.g. we have to wait until the pixels have been rendering into a texture + * before we can copy from it). We track the readiness of a request in terms + * of fences, but we also need to keep the dependency tree for the lifetime + * of the request (beyond the life of an individual fence). We use the tree + * at various points to reorder the requests whilst keeping the requests + * in order with respect to their various dependencies. + */ +struct i915_priotree { + struct list_head signalers_list; /* those before us, we depend upon */ + struct list_head waiters_list; /* those after us, they depend upon us */ + struct rb_node node; + int priority; +#define I915_PRIORITY_MAX 1024 +#define I915_PRIORITY_MIN (-I915_PRIORITY_MAX) +}; + /** * Request queue structure. * @@ -62,7 +92,7 @@ struct intel_signal_node { * The requests are reference counted. */ struct drm_i915_gem_request { - struct fence fence; + struct dma_fence fence; spinlock_t lock; /** On Which ring this request was generated */ @@ -81,10 +111,39 @@ struct drm_i915_gem_request { struct i915_gem_context *ctx; struct intel_engine_cs *engine; struct intel_ring *ring; + struct intel_timeline *timeline; struct intel_signal_node signaling; + /* Fences for the various phases in the request's lifetime. + * + * The submit fence is used to await upon all of the request's + * dependencies. When it is signaled, the request is ready to run. + * It is used by the driver to then queue the request for execution. + * + * The execute fence is used to signal when the request has been + * sent to hardware. + * + * It is illegal for the submit fence of one request to wait upon the + * execute fence of an earlier request. It should be sufficient to + * wait upon the submit fence of the earlier request. + */ struct i915_sw_fence submit; + struct i915_sw_fence execute; wait_queue_t submitq; + wait_queue_t execq; + + /* A list of everyone we wait upon, and everyone who waits upon us. + * Even though we will not be submitted to the hardware before the + * submit fence is signaled (it waits for all external events as well + * as our own requests), the scheduler still needs to know the + * dependency tree for the lifetime of the request (from execbuf + * to retirement), i.e. bidirectional dependency information for the + * request not tied to individual fences. + */ + struct i915_priotree priotree; + struct i915_dependency dep; + + u32 global_seqno; /** GEM sequence number associated with the previous request, * when the HWS breadcrumb is equal to this the GPU is processing @@ -140,14 +199,11 @@ struct drm_i915_gem_request { struct drm_i915_file_private *file_priv; /** file_priv list entry for this request */ struct list_head client_list; - - /** Link in the execlist submission queue, guarded by execlist_lock. */ - struct list_head execlist_link; }; -extern const struct fence_ops i915_fence_ops; +extern const struct dma_fence_ops i915_fence_ops; -static inline bool fence_is_i915(struct fence *fence) +static inline bool dma_fence_is_i915(const struct dma_fence *fence) { return fence->ops == &i915_fence_ops; } @@ -159,43 +215,31 @@ int i915_gem_request_add_to_client(struct drm_i915_gem_request *req, struct drm_file *file); void i915_gem_request_retire_upto(struct drm_i915_gem_request *req); -static inline u32 -i915_gem_request_get_seqno(struct drm_i915_gem_request *req) -{ - return req ? req->fence.seqno : 0; -} - -static inline struct intel_engine_cs * -i915_gem_request_get_engine(struct drm_i915_gem_request *req) -{ - return req ? req->engine : NULL; -} - static inline struct drm_i915_gem_request * -to_request(struct fence *fence) +to_request(struct dma_fence *fence) { /* We assume that NULL fence/request are interoperable */ BUILD_BUG_ON(offsetof(struct drm_i915_gem_request, fence) != 0); - GEM_BUG_ON(fence && !fence_is_i915(fence)); + GEM_BUG_ON(fence && !dma_fence_is_i915(fence)); return container_of(fence, struct drm_i915_gem_request, fence); } static inline struct drm_i915_gem_request * i915_gem_request_get(struct drm_i915_gem_request *req) { - return to_request(fence_get(&req->fence)); + return to_request(dma_fence_get(&req->fence)); } static inline struct drm_i915_gem_request * i915_gem_request_get_rcu(struct drm_i915_gem_request *req) { - return to_request(fence_get_rcu(&req->fence)); + return to_request(dma_fence_get_rcu(&req->fence)); } static inline void i915_gem_request_put(struct drm_i915_gem_request *req) { - fence_put(&req->fence); + dma_fence_put(&req->fence); } static inline void i915_gem_request_assign(struct drm_i915_gem_request **pdst, @@ -214,6 +258,8 @@ int i915_gem_request_await_object(struct drm_i915_gem_request *to, struct drm_i915_gem_object *obj, bool write); +int i915_gem_request_await_dma_fence(struct drm_i915_gem_request *req, + struct dma_fence *fence); void __i915_add_request(struct drm_i915_gem_request *req, bool flush_caches); #define i915_add_request(req) \ @@ -221,18 +267,21 @@ void __i915_add_request(struct drm_i915_gem_request *req, bool flush_caches); #define i915_add_request_no_flush(req) \ __i915_add_request(req, false) +void __i915_gem_request_submit(struct drm_i915_gem_request *request); +void i915_gem_request_submit(struct drm_i915_gem_request *request); + struct intel_rps_client; #define NO_WAITBOOST ERR_PTR(-1) #define IS_RPS_CLIENT(p) (!IS_ERR(p)) #define IS_RPS_USER(p) (!IS_ERR_OR_NULL(p)) -int i915_wait_request(struct drm_i915_gem_request *req, - unsigned int flags, - s64 *timeout, - struct intel_rps_client *rps) +long i915_wait_request(struct drm_i915_gem_request *req, + unsigned int flags, + long timeout) __attribute__((nonnull(1))); #define I915_WAIT_INTERRUPTIBLE BIT(0) #define I915_WAIT_LOCKED BIT(1) /* struct_mutex held, handle GPU reset */ +#define I915_WAIT_ALL BIT(2) /* used by i915_gem_object_wait() */ static inline u32 intel_engine_get_seqno(struct intel_engine_cs *engine); @@ -245,17 +294,37 @@ static inline bool i915_seqno_passed(u32 seq1, u32 seq2) } static inline bool -i915_gem_request_started(const struct drm_i915_gem_request *req) +__i915_gem_request_started(const struct drm_i915_gem_request *req) { + GEM_BUG_ON(!req->global_seqno); return i915_seqno_passed(intel_engine_get_seqno(req->engine), req->previous_seqno); } static inline bool -i915_gem_request_completed(const struct drm_i915_gem_request *req) +i915_gem_request_started(const struct drm_i915_gem_request *req) { + if (!req->global_seqno) + return false; + + return __i915_gem_request_started(req); +} + +static inline bool +__i915_gem_request_completed(const struct drm_i915_gem_request *req) +{ + GEM_BUG_ON(!req->global_seqno); return i915_seqno_passed(intel_engine_get_seqno(req->engine), - req->fence.seqno); + req->global_seqno); +} + +static inline bool +i915_gem_request_completed(const struct drm_i915_gem_request *req) +{ + if (!req->global_seqno) + return false; + + return __i915_gem_request_completed(req); } bool __i915_spin_request(const struct drm_i915_gem_request *request, @@ -263,7 +332,7 @@ bool __i915_spin_request(const struct drm_i915_gem_request *request, static inline bool i915_spin_request(const struct drm_i915_gem_request *request, int state, unsigned long timeout_us) { - return (i915_gem_request_started(request) && + return (__i915_gem_request_started(request) && __i915_spin_request(request, state, timeout_us)); } @@ -497,7 +566,7 @@ __i915_gem_active_get_rcu(const struct i915_gem_active *active) * compiler. * * The atomic operation at the heart of - * i915_gem_request_get_rcu(), see fence_get_rcu(), is + * i915_gem_request_get_rcu(), see dma_fence_get_rcu(), is * atomic_inc_not_zero() which is only a full memory barrier * when successful. That is, if i915_gem_request_get_rcu() * returns the request (and so with the reference counted @@ -552,53 +621,13 @@ i915_gem_active_isset(const struct i915_gem_active *active) } /** - * i915_gem_active_is_idle - report whether the active tracker is idle - * @active - the active tracker - * - * i915_gem_active_is_idle() returns true if the active tracker is currently - * unassigned or if the request is complete (but not yet retired). Requires - * the caller to hold struct_mutex (but that can be relaxed if desired). - */ -static inline bool -i915_gem_active_is_idle(const struct i915_gem_active *active, - struct mutex *mutex) -{ - return !i915_gem_active_peek(active, mutex); -} - -/** * i915_gem_active_wait - waits until the request is completed * @active - the active request on which to wait - * - * i915_gem_active_wait() waits until the request is completed before - * returning. Note that it does not guarantee that the request is - * retired first, see i915_gem_active_retire(). - * - * i915_gem_active_wait() returns immediately if the active - * request is already complete. - */ -static inline int __must_check -i915_gem_active_wait(const struct i915_gem_active *active, struct mutex *mutex) -{ - struct drm_i915_gem_request *request; - - request = i915_gem_active_peek(active, mutex); - if (!request) - return 0; - - return i915_wait_request(request, - I915_WAIT_INTERRUPTIBLE | I915_WAIT_LOCKED, - NULL, NULL); -} - -/** - * i915_gem_active_wait_unlocked - waits until the request is completed - * @active - the active request on which to wait * @flags - how to wait * @timeout - how long to wait at most * @rps - userspace client to charge for a waitboost * - * i915_gem_active_wait_unlocked() waits until the request is completed before + * i915_gem_active_wait() waits until the request is completed before * returning, without requiring any locks to be held. Note that it does not * retire any requests before returning. * @@ -614,21 +643,18 @@ i915_gem_active_wait(const struct i915_gem_active *active, struct mutex *mutex) * Returns 0 if successful, or a negative error code. */ static inline int -i915_gem_active_wait_unlocked(const struct i915_gem_active *active, - unsigned int flags, - s64 *timeout, - struct intel_rps_client *rps) +i915_gem_active_wait(const struct i915_gem_active *active, unsigned int flags) { struct drm_i915_gem_request *request; - int ret = 0; + long ret = 0; request = i915_gem_active_get_unlocked(active); if (request) { - ret = i915_wait_request(request, flags, timeout, rps); + ret = i915_wait_request(request, flags, MAX_SCHEDULE_TIMEOUT); i915_gem_request_put(request); } - return ret; + return ret < 0 ? ret : 0; } /** @@ -645,7 +671,7 @@ i915_gem_active_retire(struct i915_gem_active *active, struct mutex *mutex) { struct drm_i915_gem_request *request; - int ret; + long ret; request = i915_gem_active_raw(active, mutex); if (!request) @@ -653,8 +679,8 @@ i915_gem_active_retire(struct i915_gem_active *active, ret = i915_wait_request(request, I915_WAIT_INTERRUPTIBLE | I915_WAIT_LOCKED, - NULL, NULL); - if (ret) + MAX_SCHEDULE_TIMEOUT); + if (ret < 0) return ret; list_del_init(&active->link); @@ -665,24 +691,6 @@ i915_gem_active_retire(struct i915_gem_active *active, return 0; } -/* Convenience functions for peeking at state inside active's request whilst - * guarded by the struct_mutex. - */ - -static inline uint32_t -i915_gem_active_get_seqno(const struct i915_gem_active *active, - struct mutex *mutex) -{ - return i915_gem_request_get_seqno(i915_gem_active_peek(active, mutex)); -} - -static inline struct intel_engine_cs * -i915_gem_active_get_engine(const struct i915_gem_active *active, - struct mutex *mutex) -{ - return i915_gem_request_get_engine(i915_gem_active_peek(active, mutex)); -} - #define for_each_active(mask, idx) \ for (; mask ? idx = ffs(mask) - 1, 1 : 0; mask &= ~BIT(idx)) |
