summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h
blob: 322d25299a00cf364fba3b8ad4343ffa22b3efb5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
/*
 * Copyright 2016 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.
 *
 * Authors: Christian König
 */
#ifndef __AMDGPU_RING_H__
#define __AMDGPU_RING_H__

#include "gpu_scheduler.h"

/* max number of rings */
#define AMDGPU_MAX_RINGS		18
#define AMDGPU_MAX_GFX_RINGS		1
#define AMDGPU_MAX_COMPUTE_RINGS	8
#define AMDGPU_MAX_VCE_RINGS		3
#define AMDGPU_MAX_UVD_ENC_RINGS	2

/* some special values for the owner field */
#define AMDGPU_FENCE_OWNER_UNDEFINED	((void*)0ul)
#define AMDGPU_FENCE_OWNER_VM		((void*)1ul)

#define AMDGPU_FENCE_FLAG_64BIT         (1 << 0)
#define AMDGPU_FENCE_FLAG_INT           (1 << 1)

enum amdgpu_ring_type {
	AMDGPU_RING_TYPE_GFX,
	AMDGPU_RING_TYPE_COMPUTE,
	AMDGPU_RING_TYPE_SDMA,
	AMDGPU_RING_TYPE_UVD,
	AMDGPU_RING_TYPE_VCE,
	AMDGPU_RING_TYPE_KIQ,
	AMDGPU_RING_TYPE_UVD_ENC,
	AMDGPU_RING_TYPE_VCN_DEC,
	AMDGPU_RING_TYPE_VCN_ENC
};

struct amdgpu_device;
struct amdgpu_ring;
struct amdgpu_ib;
struct amdgpu_cs_parser;

/*
 * Fences.
 */
struct amdgpu_fence_driver {
	uint64_t			gpu_addr;
	volatile uint32_t		*cpu_addr;
	/* sync_seq is protected by ring emission lock */
	uint32_t			sync_seq;
	atomic_t			last_seq;
	bool				initialized;
	struct amdgpu_irq_src		*irq_src;
	unsigned			irq_type;
	struct timer_list		fallback_timer;
	unsigned			num_fences_mask;
	spinlock_t			lock;
	struct dma_fence		**fences;
};

int amdgpu_fence_driver_init(struct amdgpu_device *adev);
void amdgpu_fence_driver_fini(struct amdgpu_device *adev);
void amdgpu_fence_driver_force_completion(struct amdgpu_device *adev);
void amdgpu_fence_driver_force_completion_ring(struct amdgpu_ring *ring);

int amdgpu_fence_driver_init_ring(struct amdgpu_ring *ring,
				  unsigned num_hw_submission);
int amdgpu_fence_driver_start_ring(struct amdgpu_ring *ring,
				   struct amdgpu_irq_src *irq_src,
				   unsigned irq_type);
void amdgpu_fence_driver_suspend(struct amdgpu_device *adev);
void amdgpu_fence_driver_resume(struct amdgpu_device *adev);
int amdgpu_fence_emit(struct amdgpu_ring *ring, struct dma_fence **fence);
void amdgpu_fence_process(struct amdgpu_ring *ring);
int amdgpu_fence_wait_empty(struct amdgpu_ring *ring);
unsigned amdgpu_fence_count_emitted(struct amdgpu_ring *ring);

/*
 * Rings.
 */

/* provided by hw blocks that expose a ring buffer for commands */
struct amdgpu_ring_funcs {
	enum amdgpu_ring_type	type;
	uint32_t		align_mask;
	u32			nop;
	bool			support_64bit_ptrs;
	unsigned		vmhub;

	/* ring read/write ptr handling */
	u64 (*get_rptr)(struct amdgpu_ring *ring);
	u64 (*get_wptr)(struct amdgpu_ring *ring);
	void (*set_wptr)(struct amdgpu_ring *ring);
	/* validating and patching of IBs */
	int (*parse_cs)(struct amdgpu_cs_parser *p, uint32_t ib_idx);
	/* constants to calculate how many DW are needed for an emit */
	unsigned emit_frame_size;
	unsigned emit_ib_size;
	/* command emit functions */
	void (*emit_ib)(struct amdgpu_ring *ring,
			struct amdgpu_ib *ib,
			unsigned vm_id, bool ctx_switch);
	void (*emit_fence)(struct amdgpu_ring *ring, uint64_t addr,
			   uint64_t seq, unsigned flags);
	void (*emit_pipeline_sync)(struct amdgpu_ring *ring);
	void (*emit_vm_flush)(struct amdgpu_ring *ring, unsigned vm_id,
			      uint64_t pd_addr);
	void (*emit_hdp_flush)(struct amdgpu_ring *ring);
	void (*emit_hdp_invalidate)(struct amdgpu_ring *ring);
	void (*emit_gds_switch)(struct amdgpu_ring *ring, uint32_t vmid,
				uint32_t gds_base, uint32_t gds_size,
				uint32_t gws_base, uint32_t gws_size,
				uint32_t oa_base, uint32_t oa_size);
	/* testing functions */
	int (*test_ring)(struct amdgpu_ring *ring);
	int (*test_ib)(struct amdgpu_ring *ring, long timeout);
	/* insert NOP packets */
	void (*insert_nop)(struct amdgpu_ring *ring, uint32_t count);
	void (*insert_start)(struct amdgpu_ring *ring);
	void (*insert_end)(struct amdgpu_ring *ring);
	/* pad the indirect buffer to the necessary number of dw */
	void (*pad_ib)(struct amdgpu_ring *ring, struct amdgpu_ib *ib);
	unsigned (*init_cond_exec)(struct amdgpu_ring *ring);
	void (*patch_cond_exec)(struct amdgpu_ring *ring, unsigned offset);
	/* note usage for clock and power gating */
	void (*begin_use)(struct amdgpu_ring *ring);
	void (*end_use)(struct amdgpu_ring *ring);
	void (*emit_switch_buffer) (struct amdgpu_ring *ring);
	void (*emit_cntxcntl) (struct amdgpu_ring *ring, uint32_t flags);
	void (*emit_rreg)(struct amdgpu_ring *ring, uint32_t reg);
	void (*emit_wreg)(struct amdgpu_ring *ring, uint32_t reg, uint32_t val);
	void (*emit_tmz)(struct amdgpu_ring *ring, bool start);
};

struct amdgpu_ring {
	struct amdgpu_device		*adev;
	const struct amdgpu_ring_funcs	*funcs;
	struct amdgpu_fence_driver	fence_drv;
	struct amd_gpu_scheduler	sched;
	struct list_head		lru_list;

	struct amdgpu_bo	*ring_obj;
	volatile uint32_t	*ring;
	unsigned		rptr_offs;
	u64			wptr;
	u64			wptr_old;
	unsigned		ring_size;
	unsigned		max_dw;
	int			count_dw;
	uint64_t		gpu_addr;
	uint64_t		ptr_mask;
	uint32_t		buf_mask;
	bool			ready;
	u32			idx;
	u32			me;
	u32			pipe;
	u32			queue;
	struct amdgpu_bo	*mqd_obj;
	uint64_t                mqd_gpu_addr;
	void                    *mqd_ptr;
	uint64_t                eop_gpu_addr;
	u32			doorbell_index;
	bool			use_doorbell;
	unsigned		wptr_offs;
	unsigned		fence_offs;
	uint64_t		current_ctx;
	char			name[16];
	unsigned		cond_exe_offs;
	u64			cond_exe_gpu_addr;
	volatile u32		*cond_exe_cpu_addr;
	unsigned		vm_inv_eng;
	bool			has_compute_vm_bug;
#if defined(CONFIG_DEBUG_FS)
	struct dentry *ent;
#endif
};

int amdgpu_ring_alloc(struct amdgpu_ring *ring, unsigned ndw);
void amdgpu_ring_insert_nop(struct amdgpu_ring *ring, uint32_t count);
void amdgpu_ring_generic_pad_ib(struct amdgpu_ring *ring, struct amdgpu_ib *ib);
void amdgpu_ring_commit(struct amdgpu_ring *ring);
void amdgpu_ring_undo(struct amdgpu_ring *ring);
int amdgpu_ring_init(struct amdgpu_device *adev, struct amdgpu_ring *ring,
		     unsigned ring_size, struct amdgpu_irq_src *irq_src,
		     unsigned irq_type);
void amdgpu_ring_fini(struct amdgpu_ring *ring);
int amdgpu_ring_lru_get(struct amdgpu_device *adev, int type, int *blacklist,
			int num_blacklist, struct amdgpu_ring **ring);
void amdgpu_ring_lru_touch(struct amdgpu_device *adev, struct amdgpu_ring *ring);
static inline void amdgpu_ring_clear_ring(struct amdgpu_ring *ring)
{
	int i = 0;
	while (i <= ring->buf_mask)
		ring->ring[i++] = ring->funcs->nop;

}

static inline void amdgpu_ring_write(struct amdgpu_ring *ring, uint32_t v)
{
	if (ring->count_dw <= 0)
		DRM_ERROR("amdgpu: writing more dwords to the ring than expected!\n");
	ring->ring[ring->wptr++ & ring->buf_mask] = v;
	ring->wptr &= ring->ptr_mask;
	ring->count_dw--;
}

static inline void amdgpu_ring_write_multiple(struct amdgpu_ring *ring,
					      void *src, int count_dw)
{
	unsigned occupied, chunk1, chunk2;
	void *dst;

	if (unlikely(ring->count_dw < count_dw))
		DRM_ERROR("amdgpu: writing more dwords to the ring than expected!\n");

	occupied = ring->wptr & ring->buf_mask;
	dst = (void *)&ring->ring[occupied];
	chunk1 = ring->buf_mask + 1 - occupied;
	chunk1 = (chunk1 >= count_dw) ? count_dw: chunk1;
	chunk2 = count_dw - chunk1;
	chunk1 <<= 2;
	chunk2 <<= 2;

	if (chunk1)
		memcpy(dst, src, chunk1);

	if (chunk2) {
		src += chunk1;
		dst = (void *)ring->ring;
		memcpy(dst, src, chunk2);
	}

	ring->wptr += count_dw;
	ring->wptr &= ring->ptr_mask;
	ring->count_dw -= count_dw;
}

#endif