These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / drivers / gpu / drm / amd / scheduler / gpu_scheduler.h

diff --git a/kernel/drivers/gpu/drm/amd/scheduler/gpu_scheduler.h b/kernel/drivers/gpu/drm/amd/scheduler/gpu_scheduler.h
new file mode 100644 (file)
index 0000000..a0f0ae5
--- /dev/null
+++ b/kernel/drivers/gpu/drm/amd/scheduler/gpu_scheduler.h
@@ -0,0 +1,143 @@
+/*
+ * Copyright 2015 Advanced Micro Devices, Inc.
+ *
+ * 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.
+ *
+ * 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.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
+ *
+ */
+
+#ifndef _GPU_SCHEDULER_H_
+#define _GPU_SCHEDULER_H_
+
+#include <linux/kfifo.h>
+#include <linux/fence.h>
+
+#define AMD_SCHED_FENCE_SCHEDULED_BIT  FENCE_FLAG_USER_BITS
+
+struct amd_gpu_scheduler;
+struct amd_sched_rq;
+
+extern struct kmem_cache *sched_fence_slab;
+extern atomic_t sched_fence_slab_ref;
+
+/**
+ * A scheduler entity is a wrapper around a job queue or a group
+ * of other entities. Entities take turns emitting jobs from their 
+ * job queues to corresponding hardware ring based on scheduling
+ * policy.
+*/
+struct amd_sched_entity {
+       struct list_head                list;
+       struct amd_sched_rq             *rq;
+       struct amd_gpu_scheduler        *sched;
+
+       spinlock_t                      queue_lock;
+       struct kfifo                    job_queue;
+
+       atomic_t                        fence_seq;
+       uint64_t                        fence_context;
+
+       struct fence                    *dependency;
+       struct fence_cb                 cb;
+};
+
+/**
+ * Run queue is a set of entities scheduling command submissions for
+ * one specific ring. It implements the scheduling policy that selects
+ * the next entity to emit commands from.
+*/
+struct amd_sched_rq {
+       spinlock_t              lock;
+       struct list_head        entities;
+       struct amd_sched_entity *current_entity;
+};
+
+struct amd_sched_fence {
+       struct fence                    base;
+       struct fence_cb                 cb;
+       struct list_head                scheduled_cb;
+       struct amd_gpu_scheduler        *sched;
+       spinlock_t                      lock;
+       void                            *owner;
+       struct delayed_work             dwork;
+       struct list_head                list;
+};
+
+struct amd_sched_job {
+       struct amd_gpu_scheduler        *sched;
+       struct amd_sched_entity         *s_entity;
+       struct amd_sched_fence          *s_fence;
+};
+
+extern const struct fence_ops amd_sched_fence_ops;
+static inline struct amd_sched_fence *to_amd_sched_fence(struct fence *f)
+{
+       struct amd_sched_fence *__f = container_of(f, struct amd_sched_fence, base);
+
+       if (__f->base.ops == &amd_sched_fence_ops)
+               return __f;
+
+       return NULL;
+}
+
+/**
+ * Define the backend operations called by the scheduler,
+ * these functions should be implemented in driver side
+*/
+struct amd_sched_backend_ops {
+       struct fence *(*dependency)(struct amd_sched_job *sched_job);
+       struct fence *(*run_job)(struct amd_sched_job *sched_job);
+};
+
+/**
+ * One scheduler is implemented for each hardware ring
+*/
+struct amd_gpu_scheduler {
+       struct amd_sched_backend_ops    *ops;
+       uint32_t                        hw_submission_limit;
+       long                            timeout;
+       const char                      *name;
+       struct amd_sched_rq             sched_rq;
+       struct amd_sched_rq             kernel_rq;
+       wait_queue_head_t               wake_up_worker;
+       wait_queue_head_t               job_scheduled;
+       atomic_t                        hw_rq_count;
+       struct list_head                fence_list;
+       spinlock_t                      fence_list_lock;
+       struct task_struct              *thread;
+};
+
+int amd_sched_init(struct amd_gpu_scheduler *sched,
+                  struct amd_sched_backend_ops *ops,
+                  uint32_t hw_submission, long timeout, const char *name);
+void amd_sched_fini(struct amd_gpu_scheduler *sched);
+
+int amd_sched_entity_init(struct amd_gpu_scheduler *sched,
+                         struct amd_sched_entity *entity,
+                         struct amd_sched_rq *rq,
+                         uint32_t jobs);
+void amd_sched_entity_fini(struct amd_gpu_scheduler *sched,
+                          struct amd_sched_entity *entity);
+void amd_sched_entity_push_job(struct amd_sched_job *sched_job);
+
+struct amd_sched_fence *amd_sched_fence_create(
+       struct amd_sched_entity *s_entity, void *owner);
+void amd_sched_fence_scheduled(struct amd_sched_fence *fence);
+void amd_sched_fence_signal(struct amd_sched_fence *fence);
+
+#endif