1 /*
2 * Copyright 2019 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
24 #ifndef __AMDGPU_MES_H__
25 #define __AMDGPU_MES_H__
26
27 #include "amdgpu_irq.h"
28 #include "kgd_kfd_interface.h"
29 #include "amdgpu_gfx.h"
30 #include "amdgpu_doorbell.h"
31 #include <linux/sched/mm.h>
32
33 #define AMDGPU_MES_MAX_COMPUTE_PIPES 8
34 #define AMDGPU_MES_MAX_GFX_PIPES 2
35 #define AMDGPU_MES_MAX_SDMA_PIPES 2
36
37 #define AMDGPU_MES_API_VERSION_SHIFT 12
38 #define AMDGPU_MES_FEAT_VERSION_SHIFT 24
39
40 #define AMDGPU_MES_VERSION_MASK 0x00000fff
41 #define AMDGPU_MES_API_VERSION_MASK 0x00fff000
42 #define AMDGPU_MES_FEAT_VERSION_MASK 0xff000000
43
44 enum amdgpu_mes_priority_level {
45 AMDGPU_MES_PRIORITY_LEVEL_LOW = 0,
46 AMDGPU_MES_PRIORITY_LEVEL_NORMAL = 1,
47 AMDGPU_MES_PRIORITY_LEVEL_MEDIUM = 2,
48 AMDGPU_MES_PRIORITY_LEVEL_HIGH = 3,
49 AMDGPU_MES_PRIORITY_LEVEL_REALTIME = 4,
50 AMDGPU_MES_PRIORITY_NUM_LEVELS
51 };
52
53 #define AMDGPU_MES_PROC_CTX_SIZE 0x1000 /* one page area */
54 #define AMDGPU_MES_GANG_CTX_SIZE 0x1000 /* one page area */
55
56 struct amdgpu_mes_funcs;
57
58 enum admgpu_mes_pipe {
59 AMDGPU_MES_SCHED_PIPE = 0,
60 AMDGPU_MES_KIQ_PIPE,
61 AMDGPU_MAX_MES_PIPES = 2,
62 };
63
64 struct amdgpu_mes {
65 struct amdgpu_device *adev;
66
67 struct mutex mutex_hidden;
68
69 struct idr pasid_idr;
70 struct idr gang_id_idr;
71 struct idr queue_id_idr;
72 struct ida doorbell_ida;
73
74 spinlock_t queue_id_lock;
75
76 uint32_t sched_version;
77 uint32_t kiq_version;
78
79 uint32_t total_max_queue;
80 uint32_t max_doorbell_slices;
81
82 uint64_t default_process_quantum;
83 uint64_t default_gang_quantum;
84
85 struct amdgpu_ring ring;
86 spinlock_t ring_lock;
87
88 const struct firmware *fw[AMDGPU_MAX_MES_PIPES];
89
90 /* mes ucode */
91 struct amdgpu_bo *ucode_fw_obj[AMDGPU_MAX_MES_PIPES];
92 uint64_t ucode_fw_gpu_addr[AMDGPU_MAX_MES_PIPES];
93 uint32_t *ucode_fw_ptr[AMDGPU_MAX_MES_PIPES];
94 uint64_t uc_start_addr[AMDGPU_MAX_MES_PIPES];
95
96 /* mes ucode data */
97 struct amdgpu_bo *data_fw_obj[AMDGPU_MAX_MES_PIPES];
98 uint64_t data_fw_gpu_addr[AMDGPU_MAX_MES_PIPES];
99 uint32_t *data_fw_ptr[AMDGPU_MAX_MES_PIPES];
100 uint64_t data_start_addr[AMDGPU_MAX_MES_PIPES];
101
102 /* eop gpu obj */
103 struct amdgpu_bo *eop_gpu_obj[AMDGPU_MAX_MES_PIPES];
104 uint64_t eop_gpu_addr[AMDGPU_MAX_MES_PIPES];
105
106 void *mqd_backup[AMDGPU_MAX_MES_PIPES];
107 struct amdgpu_irq_src irq[AMDGPU_MAX_MES_PIPES];
108
109 uint32_t vmid_mask_gfxhub;
110 uint32_t vmid_mask_mmhub;
111 uint32_t compute_hqd_mask[AMDGPU_MES_MAX_COMPUTE_PIPES];
112 uint32_t gfx_hqd_mask[AMDGPU_MES_MAX_GFX_PIPES];
113 uint32_t sdma_hqd_mask[AMDGPU_MES_MAX_SDMA_PIPES];
114 uint32_t aggregated_doorbells[AMDGPU_MES_PRIORITY_NUM_LEVELS];
115 uint32_t sch_ctx_offs;
116 uint64_t sch_ctx_gpu_addr;
117 uint64_t *sch_ctx_ptr;
118 uint32_t query_status_fence_offs;
119 uint64_t query_status_fence_gpu_addr;
120 uint64_t *query_status_fence_ptr;
121 uint32_t read_val_offs;
122 uint64_t read_val_gpu_addr;
123 uint32_t *read_val_ptr;
124
125 uint32_t saved_flags;
126
127 /* initialize kiq pipe */
128 int (*kiq_hw_init)(struct amdgpu_device *adev);
129 int (*kiq_hw_fini)(struct amdgpu_device *adev);
130
131 /* MES doorbells */
132 uint32_t db_start_dw_offset;
133 uint32_t num_mes_dbs;
134 unsigned long *doorbell_bitmap;
135
136 /* ip specific functions */
137 const struct amdgpu_mes_funcs *funcs;
138 };
139
140 struct amdgpu_mes_process {
141 int pasid;
142 struct amdgpu_vm *vm;
143 uint64_t pd_gpu_addr;
144 struct amdgpu_bo *proc_ctx_bo;
145 uint64_t proc_ctx_gpu_addr;
146 void *proc_ctx_cpu_ptr;
147 uint64_t process_quantum;
148 struct list_head gang_list;
149 uint32_t doorbell_index;
150 struct mutex doorbell_lock;
151 };
152
153 struct amdgpu_mes_gang {
154 int gang_id;
155 int priority;
156 int inprocess_gang_priority;
157 int global_priority_level;
158 struct list_head list;
159 struct amdgpu_mes_process *process;
160 struct amdgpu_bo *gang_ctx_bo;
161 uint64_t gang_ctx_gpu_addr;
162 void *gang_ctx_cpu_ptr;
163 uint64_t gang_quantum;
164 struct list_head queue_list;
165 };
166
167 struct amdgpu_mes_queue {
168 struct list_head list;
169 struct amdgpu_mes_gang *gang;
170 int queue_id;
171 uint64_t doorbell_off;
172 struct amdgpu_bo *mqd_obj;
173 void *mqd_cpu_ptr;
174 uint64_t mqd_gpu_addr;
175 uint64_t wptr_gpu_addr;
176 int queue_type;
177 int paging;
178 struct amdgpu_ring *ring;
179 };
180
181 struct amdgpu_mes_queue_properties {
182 int queue_type;
183 uint64_t hqd_base_gpu_addr;
184 uint64_t rptr_gpu_addr;
185 uint64_t wptr_gpu_addr;
186 uint64_t wptr_mc_addr;
187 uint32_t queue_size;
188 uint64_t eop_gpu_addr;
189 uint32_t hqd_pipe_priority;
190 uint32_t hqd_queue_priority;
191 bool paging;
192 struct amdgpu_ring *ring;
193 /* out */
194 uint64_t doorbell_off;
195 };
196
197 struct amdgpu_mes_gang_properties {
198 uint32_t priority;
199 uint32_t gang_quantum;
200 uint32_t inprocess_gang_priority;
201 uint32_t priority_level;
202 int global_priority_level;
203 };
204
205 struct mes_add_queue_input {
206 uint32_t process_id;
207 uint64_t page_table_base_addr;
208 uint64_t process_va_start;
209 uint64_t process_va_end;
210 uint64_t process_quantum;
211 uint64_t process_context_addr;
212 uint64_t gang_quantum;
213 uint64_t gang_context_addr;
214 uint32_t inprocess_gang_priority;
215 uint32_t gang_global_priority_level;
216 uint32_t doorbell_offset;
217 uint64_t mqd_addr;
218 uint64_t wptr_addr;
219 uint64_t wptr_mc_addr;
220 uint32_t queue_type;
221 uint32_t paging;
222 uint32_t gws_base;
223 uint32_t gws_size;
224 uint64_t tba_addr;
225 uint64_t tma_addr;
226 uint32_t trap_en;
227 uint32_t skip_process_ctx_clear;
228 uint32_t is_kfd_process;
229 uint32_t is_aql_queue;
230 uint32_t queue_size;
231 uint32_t exclusively_scheduled;
232 };
233
234 struct mes_remove_queue_input {
235 uint32_t doorbell_offset;
236 uint64_t gang_context_addr;
237 };
238
239 struct mes_unmap_legacy_queue_input {
240 enum amdgpu_unmap_queues_action action;
241 uint32_t queue_type;
242 uint32_t doorbell_offset;
243 uint32_t pipe_id;
244 uint32_t queue_id;
245 uint64_t trail_fence_addr;
246 uint64_t trail_fence_data;
247 };
248
249 struct mes_suspend_gang_input {
250 bool suspend_all_gangs;
251 uint64_t gang_context_addr;
252 uint64_t suspend_fence_addr;
253 uint32_t suspend_fence_value;
254 };
255
256 struct mes_resume_gang_input {
257 bool resume_all_gangs;
258 uint64_t gang_context_addr;
259 };
260
261 enum mes_misc_opcode {
262 MES_MISC_OP_WRITE_REG,
263 MES_MISC_OP_READ_REG,
264 MES_MISC_OP_WRM_REG_WAIT,
265 MES_MISC_OP_WRM_REG_WR_WAIT,
266 MES_MISC_OP_SET_SHADER_DEBUGGER,
267 };
268
269 struct mes_misc_op_input {
270 enum mes_misc_opcode op;
271
272 union {
273 struct {
274 uint32_t reg_offset;
275 uint64_t buffer_addr;
276 } read_reg;
277
278 struct {
279 uint32_t reg_offset;
280 uint32_t reg_value;
281 } write_reg;
282
283 struct {
284 uint32_t ref;
285 uint32_t mask;
286 uint32_t reg0;
287 uint32_t reg1;
288 } wrm_reg;
289
290 struct {
291 uint64_t process_context_addr;
292 union {
293 struct {
294 uint64_t single_memop : 1;
295 uint64_t single_alu_op : 1;
296 uint64_t reserved: 30;
297 };
298 uint32_t u32all;
299 } flags;
300 uint32_t spi_gdbg_per_vmid_cntl;
301 uint32_t tcp_watch_cntl[4];
302 uint32_t trap_en;
303 } set_shader_debugger;
304 };
305 };
306
307 struct amdgpu_mes_funcs {
308 int (*add_hw_queue)(struct amdgpu_mes *mes,
309 struct mes_add_queue_input *input);
310
311 int (*remove_hw_queue)(struct amdgpu_mes *mes,
312 struct mes_remove_queue_input *input);
313
314 int (*unmap_legacy_queue)(struct amdgpu_mes *mes,
315 struct mes_unmap_legacy_queue_input *input);
316
317 int (*suspend_gang)(struct amdgpu_mes *mes,
318 struct mes_suspend_gang_input *input);
319
320 int (*resume_gang)(struct amdgpu_mes *mes,
321 struct mes_resume_gang_input *input);
322
323 int (*misc_op)(struct amdgpu_mes *mes,
324 struct mes_misc_op_input *input);
325 };
326
327 #define amdgpu_mes_kiq_hw_init(adev) (adev)->mes.kiq_hw_init((adev))
328 #define amdgpu_mes_kiq_hw_fini(adev) (adev)->mes.kiq_hw_fini((adev))
329
330 int amdgpu_mes_ctx_get_offs(struct amdgpu_ring *ring, unsigned int id_offs);
331
332 int amdgpu_mes_init_microcode(struct amdgpu_device *adev, int pipe);
333 int amdgpu_mes_init(struct amdgpu_device *adev);
334 void amdgpu_mes_fini(struct amdgpu_device *adev);
335
336 int amdgpu_mes_create_process(struct amdgpu_device *adev, int pasid,
337 struct amdgpu_vm *vm);
338 void amdgpu_mes_destroy_process(struct amdgpu_device *adev, int pasid);
339
340 int amdgpu_mes_add_gang(struct amdgpu_device *adev, int pasid,
341 struct amdgpu_mes_gang_properties *gprops,
342 int *gang_id);
343 int amdgpu_mes_remove_gang(struct amdgpu_device *adev, int gang_id);
344
345 int amdgpu_mes_suspend(struct amdgpu_device *adev);
346 int amdgpu_mes_resume(struct amdgpu_device *adev);
347
348 int amdgpu_mes_add_hw_queue(struct amdgpu_device *adev, int gang_id,
349 struct amdgpu_mes_queue_properties *qprops,
350 int *queue_id);
351 int amdgpu_mes_remove_hw_queue(struct amdgpu_device *adev, int queue_id);
352
353 int amdgpu_mes_unmap_legacy_queue(struct amdgpu_device *adev,
354 struct amdgpu_ring *ring,
355 enum amdgpu_unmap_queues_action action,
356 u64 gpu_addr, u64 seq);
357
358 uint32_t amdgpu_mes_rreg(struct amdgpu_device *adev, uint32_t reg);
359 int amdgpu_mes_wreg(struct amdgpu_device *adev,
360 uint32_t reg, uint32_t val);
361 int amdgpu_mes_reg_wait(struct amdgpu_device *adev, uint32_t reg,
362 uint32_t val, uint32_t mask);
363 int amdgpu_mes_reg_write_reg_wait(struct amdgpu_device *adev,
364 uint32_t reg0, uint32_t reg1,
365 uint32_t ref, uint32_t mask);
366 int amdgpu_mes_set_shader_debugger(struct amdgpu_device *adev,
367 uint64_t process_context_addr,
368 uint32_t spi_gdbg_per_vmid_cntl,
369 const uint32_t *tcp_watch_cntl,
370 uint32_t flags,
371 bool trap_en);
372
373 int amdgpu_mes_add_ring(struct amdgpu_device *adev, int gang_id,
374 int queue_type, int idx,
375 struct amdgpu_mes_ctx_data *ctx_data,
376 struct amdgpu_ring **out);
377 void amdgpu_mes_remove_ring(struct amdgpu_device *adev,
378 struct amdgpu_ring *ring);
379
380 uint32_t amdgpu_mes_get_aggregated_doorbell_index(struct amdgpu_device *adev,
381 enum amdgpu_mes_priority_level prio);
382
383 int amdgpu_mes_ctx_alloc_meta_data(struct amdgpu_device *adev,
384 struct amdgpu_mes_ctx_data *ctx_data);
385 void amdgpu_mes_ctx_free_meta_data(struct amdgpu_mes_ctx_data *ctx_data);
386 int amdgpu_mes_ctx_map_meta_data(struct amdgpu_device *adev,
387 struct amdgpu_vm *vm,
388 struct amdgpu_mes_ctx_data *ctx_data);
389 int amdgpu_mes_ctx_unmap_meta_data(struct amdgpu_device *adev,
390 struct amdgpu_mes_ctx_data *ctx_data);
391
392 int amdgpu_mes_self_test(struct amdgpu_device *adev);
393
394 int amdgpu_mes_doorbell_process_slice(struct amdgpu_device *adev);
395
396 /*
397 * MES lock can be taken in MMU notifiers.
398 *
399 * A bit more detail about why to set no-FS reclaim with MES lock:
400 *
401 * The purpose of the MMU notifier is to stop GPU access to memory so
402 * that the Linux VM subsystem can move pages around safely. This is
403 * done by preempting user mode queues for the affected process. When
404 * MES is used, MES lock needs to be taken to preempt the queues.
405 *
406 * The MMU notifier callback entry point in the driver is
407 * amdgpu_mn_invalidate_range_start_hsa. The relevant call chain from
408 * there is:
409 * amdgpu_amdkfd_evict_userptr -> kgd2kfd_quiesce_mm ->
410 * kfd_process_evict_queues -> pdd->dev->dqm->ops.evict_process_queues
411 *
412 * The last part of the chain is a function pointer where we take the
413 * MES lock.
414 *
415 * The problem with taking locks in the MMU notifier is, that MMU
416 * notifiers can be called in reclaim-FS context. That's where the
417 * kernel frees up pages to make room for new page allocations under
418 * memory pressure. While we are running in reclaim-FS context, we must
419 * not trigger another memory reclaim operation because that would
420 * recursively reenter the reclaim code and cause a deadlock. The
421 * memalloc_nofs_save/restore calls guarantee that.
422 *
423 * In addition we also need to avoid lock dependencies on other locks taken
424 * under the MES lock, for example reservation locks. Here is a possible
425 * scenario of a deadlock:
426 * Thread A: takes and holds reservation lock | triggers reclaim-FS |
427 * MMU notifier | blocks trying to take MES lock
428 * Thread B: takes and holds MES lock | blocks trying to take reservation lock
429 *
430 * In this scenario Thread B gets involved in a deadlock even without
431 * triggering a reclaim-FS operation itself.
432 * To fix this and break the lock dependency chain you'd need to either:
433 * 1. protect reservation locks with memalloc_nofs_save/restore, or
434 * 2. avoid taking reservation locks under the MES lock.
435 *
436 * Reservation locks are taken all over the kernel in different subsystems, we
437 * have no control over them and their lock dependencies.So the only workable
438 * solution is to avoid taking other locks under the MES lock.
439 * As a result, make sure no reclaim-FS happens while holding this lock anywhere
440 * to prevent deadlocks when an MMU notifier runs in reclaim-FS context.
441 */
amdgpu_mes_lock(struct amdgpu_mes * mes)442 static inline void amdgpu_mes_lock(struct amdgpu_mes *mes)
443 {
444 mutex_lock(&mes->mutex_hidden);
445 mes->saved_flags = memalloc_noreclaim_save();
446 }
447
amdgpu_mes_unlock(struct amdgpu_mes * mes)448 static inline void amdgpu_mes_unlock(struct amdgpu_mes *mes)
449 {
450 memalloc_noreclaim_restore(mes->saved_flags);
451 mutex_unlock(&mes->mutex_hidden);
452 }
453 #endif /* __AMDGPU_MES_H__ */
454
