1 /*
2  * Copyright 2018 Advanced Micro Devices, Inc.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20  * OTHER DEALINGS IN THE SOFTWARE.
21  *
22  */
23 #ifndef __AMDGPU_CTX_H__
24 #define __AMDGPU_CTX_H__
25 
26 #include "amdgpu_ring.h"
27 
28 struct drm_device;
29 struct drm_file;
30 struct amdgpu_fpriv;
31 
32 #define AMDGPU_MAX_ENTITY_NUM 4
33 #define AMDGPU_CTX_FENCE_USAGE_MIN_RATIO(max, total) ((max) > 16384ULL*(total))
34 
35 struct amdgpu_ctx_entity {
36 	uint64_t		sequence;
37 	struct drm_sched_entity	entity;
38 	struct dma_fence	*fences[];
39 };
40 
41 struct amdgpu_ctx {
42 	struct kref			refcount;
43 	struct amdgpu_device		*adev;
44 	unsigned			reset_counter;
45 	unsigned			reset_counter_query;
46 	uint32_t			vram_lost_counter;
47 	spinlock_t			ring_lock;
48 	struct amdgpu_ctx_entity	*entities[AMDGPU_HW_IP_NUM][AMDGPU_MAX_ENTITY_NUM];
49 	bool				preamble_presented;
50 	enum drm_sched_priority		init_priority;
51 	enum drm_sched_priority		override_priority;
52 	struct mutex			lock;
53 	atomic_t			guilty;
54 	unsigned long			ras_counter_ce;
55 	unsigned long			ras_counter_ue;
56 };
57 
58 struct amdgpu_ctx_mgr {
59 	struct amdgpu_device	*adev;
60 	struct mutex		lock;
61 	/* protected by lock */
62 	struct idr		ctx_handles;
63 };
64 
65 extern const unsigned int amdgpu_ctx_num_entities[AMDGPU_HW_IP_NUM];
66 
67 struct amdgpu_ctx *amdgpu_ctx_get(struct amdgpu_fpriv *fpriv, uint32_t id);
68 int amdgpu_ctx_put(struct amdgpu_ctx *ctx);
69 
70 int amdgpu_ctx_get_entity(struct amdgpu_ctx *ctx, u32 hw_ip, u32 instance,
71 			  u32 ring, struct drm_sched_entity **entity);
72 void amdgpu_ctx_add_fence(struct amdgpu_ctx *ctx,
73 			  struct drm_sched_entity *entity,
74 			  struct dma_fence *fence, uint64_t *seq);
75 struct dma_fence *amdgpu_ctx_get_fence(struct amdgpu_ctx *ctx,
76 				       struct drm_sched_entity *entity,
77 				       uint64_t seq);
78 void amdgpu_ctx_priority_override(struct amdgpu_ctx *ctx,
79 				  enum drm_sched_priority priority);
80 
81 int amdgpu_ctx_ioctl(struct drm_device *dev, void *data,
82 		     struct drm_file *filp);
83 
84 int amdgpu_ctx_wait_prev_fence(struct amdgpu_ctx *ctx,
85 			       struct drm_sched_entity *entity);
86 
87 void amdgpu_ctx_mgr_init(struct amdgpu_ctx_mgr *mgr);
88 void amdgpu_ctx_mgr_entity_fini(struct amdgpu_ctx_mgr *mgr);
89 long amdgpu_ctx_mgr_entity_flush(struct amdgpu_ctx_mgr *mgr, long timeout);
90 void amdgpu_ctx_mgr_fini(struct amdgpu_ctx_mgr *mgr);
91 ktime_t amdgpu_ctx_mgr_fence_usage(struct amdgpu_ctx_mgr *mgr, uint32_t hwip,
92 		uint32_t idx, uint64_t *elapsed);
93 #endif
94