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[linux.git] / drivers / gpu / drm / amd / amdgpu / amdgpu_xcp.c
1 /*
2  * Copyright 2022 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 #include "amdgpu.h"
24 #include "amdgpu_xcp.h"
25 #include "amdgpu_drv.h"
26
27 #include <drm/drm_drv.h>
28 #include "../amdxcp/amdgpu_xcp_drv.h"
29
30 static int __amdgpu_xcp_run(struct amdgpu_xcp_mgr *xcp_mgr,
31                             struct amdgpu_xcp_ip *xcp_ip, int xcp_state)
32 {
33         int (*run_func)(void *handle, uint32_t inst_mask);
34         int ret = 0;
35
36         if (!xcp_ip || !xcp_ip->valid || !xcp_ip->ip_funcs)
37                 return 0;
38
39         run_func = NULL;
40
41         switch (xcp_state) {
42         case AMDGPU_XCP_PREPARE_SUSPEND:
43                 run_func = xcp_ip->ip_funcs->prepare_suspend;
44                 break;
45         case AMDGPU_XCP_SUSPEND:
46                 run_func = xcp_ip->ip_funcs->suspend;
47                 break;
48         case AMDGPU_XCP_PREPARE_RESUME:
49                 run_func = xcp_ip->ip_funcs->prepare_resume;
50                 break;
51         case AMDGPU_XCP_RESUME:
52                 run_func = xcp_ip->ip_funcs->resume;
53                 break;
54         }
55
56         if (run_func)
57                 ret = run_func(xcp_mgr->adev, xcp_ip->inst_mask);
58
59         return ret;
60 }
61
62 static int amdgpu_xcp_run_transition(struct amdgpu_xcp_mgr *xcp_mgr, int xcp_id,
63                                      int state)
64 {
65         struct amdgpu_xcp_ip *xcp_ip;
66         struct amdgpu_xcp *xcp;
67         int i, ret;
68
69         if (xcp_id >= MAX_XCP || !xcp_mgr->xcp[xcp_id].valid)
70                 return -EINVAL;
71
72         xcp = &xcp_mgr->xcp[xcp_id];
73         for (i = 0; i < AMDGPU_XCP_MAX_BLOCKS; ++i) {
74                 xcp_ip = &xcp->ip[i];
75                 ret = __amdgpu_xcp_run(xcp_mgr, xcp_ip, state);
76                 if (ret)
77                         break;
78         }
79
80         return ret;
81 }
82
83 int amdgpu_xcp_prepare_suspend(struct amdgpu_xcp_mgr *xcp_mgr, int xcp_id)
84 {
85         return amdgpu_xcp_run_transition(xcp_mgr, xcp_id,
86                                          AMDGPU_XCP_PREPARE_SUSPEND);
87 }
88
89 int amdgpu_xcp_suspend(struct amdgpu_xcp_mgr *xcp_mgr, int xcp_id)
90 {
91         return amdgpu_xcp_run_transition(xcp_mgr, xcp_id, AMDGPU_XCP_SUSPEND);
92 }
93
94 int amdgpu_xcp_prepare_resume(struct amdgpu_xcp_mgr *xcp_mgr, int xcp_id)
95 {
96         return amdgpu_xcp_run_transition(xcp_mgr, xcp_id,
97                                          AMDGPU_XCP_PREPARE_RESUME);
98 }
99
100 int amdgpu_xcp_resume(struct amdgpu_xcp_mgr *xcp_mgr, int xcp_id)
101 {
102         return amdgpu_xcp_run_transition(xcp_mgr, xcp_id, AMDGPU_XCP_RESUME);
103 }
104
105 static void __amdgpu_xcp_add_block(struct amdgpu_xcp_mgr *xcp_mgr, int xcp_id,
106                                    struct amdgpu_xcp_ip *ip)
107 {
108         struct amdgpu_xcp *xcp;
109
110         if (!ip)
111                 return;
112
113         xcp = &xcp_mgr->xcp[xcp_id];
114         xcp->ip[ip->ip_id] = *ip;
115         xcp->ip[ip->ip_id].valid = true;
116
117         xcp->valid = true;
118 }
119
120 int amdgpu_xcp_init(struct amdgpu_xcp_mgr *xcp_mgr, int num_xcps, int mode)
121 {
122         struct amdgpu_device *adev = xcp_mgr->adev;
123         struct amdgpu_xcp_ip ip;
124         uint8_t mem_id;
125         int i, j, ret;
126
127         if (!num_xcps || num_xcps > MAX_XCP)
128                 return -EINVAL;
129
130         xcp_mgr->mode = mode;
131
132         for (i = 0; i < MAX_XCP; ++i)
133                 xcp_mgr->xcp[i].valid = false;
134
135         /* This is needed for figuring out memory id of xcp */
136         xcp_mgr->num_xcp_per_mem_partition = num_xcps / xcp_mgr->adev->gmc.num_mem_partitions;
137
138         for (i = 0; i < num_xcps; ++i) {
139                 for (j = AMDGPU_XCP_GFXHUB; j < AMDGPU_XCP_MAX_BLOCKS; ++j) {
140                         ret = xcp_mgr->funcs->get_ip_details(xcp_mgr, i, j,
141                                                              &ip);
142                         if (ret)
143                                 continue;
144
145                         __amdgpu_xcp_add_block(xcp_mgr, i, &ip);
146                 }
147
148                 xcp_mgr->xcp[i].id = i;
149
150                 if (xcp_mgr->funcs->get_xcp_mem_id) {
151                         ret = xcp_mgr->funcs->get_xcp_mem_id(
152                                 xcp_mgr, &xcp_mgr->xcp[i], &mem_id);
153                         if (ret)
154                                 continue;
155                         else
156                                 xcp_mgr->xcp[i].mem_id = mem_id;
157                 }
158         }
159
160         xcp_mgr->num_xcps = num_xcps;
161         amdgpu_xcp_update_partition_sched_list(adev);
162
163         return 0;
164 }
165
166 static int __amdgpu_xcp_switch_partition_mode(struct amdgpu_xcp_mgr *xcp_mgr,
167                                               int mode)
168 {
169         int ret, curr_mode, num_xcps = 0;
170
171         if (!xcp_mgr->funcs || !xcp_mgr->funcs->switch_partition_mode)
172                 return 0;
173
174         mutex_lock(&xcp_mgr->xcp_lock);
175
176         curr_mode = xcp_mgr->mode;
177         /* State set to transient mode */
178         xcp_mgr->mode = AMDGPU_XCP_MODE_TRANS;
179
180         ret = xcp_mgr->funcs->switch_partition_mode(xcp_mgr, mode, &num_xcps);
181
182         if (ret) {
183                 /* Failed, get whatever mode it's at now */
184                 if (xcp_mgr->funcs->query_partition_mode)
185                         xcp_mgr->mode = amdgpu_xcp_query_partition_mode(
186                                 xcp_mgr, AMDGPU_XCP_FL_LOCKED);
187                 else
188                         xcp_mgr->mode = curr_mode;
189
190                 goto out;
191         }
192
193 out:
194         mutex_unlock(&xcp_mgr->xcp_lock);
195
196         return ret;
197 }
198
199 int amdgpu_xcp_switch_partition_mode(struct amdgpu_xcp_mgr *xcp_mgr, int mode)
200 {
201         if (!xcp_mgr || mode == AMDGPU_XCP_MODE_NONE)
202                 return -EINVAL;
203
204         if (xcp_mgr->mode == mode)
205                 return 0;
206
207         return __amdgpu_xcp_switch_partition_mode(xcp_mgr, mode);
208 }
209
210 int amdgpu_xcp_restore_partition_mode(struct amdgpu_xcp_mgr *xcp_mgr)
211 {
212         if (!xcp_mgr || xcp_mgr->mode == AMDGPU_XCP_MODE_NONE)
213                 return 0;
214
215         return __amdgpu_xcp_switch_partition_mode(xcp_mgr, xcp_mgr->mode);
216 }
217
218 int amdgpu_xcp_query_partition_mode(struct amdgpu_xcp_mgr *xcp_mgr, u32 flags)
219 {
220         int mode;
221
222         if (!amdgpu_sriov_vf(xcp_mgr->adev) &&
223             xcp_mgr->mode == AMDGPU_XCP_MODE_NONE)
224                 return xcp_mgr->mode;
225
226         if (!xcp_mgr->funcs || !xcp_mgr->funcs->query_partition_mode)
227                 return xcp_mgr->mode;
228
229         if (!(flags & AMDGPU_XCP_FL_LOCKED))
230                 mutex_lock(&xcp_mgr->xcp_lock);
231         mode = xcp_mgr->funcs->query_partition_mode(xcp_mgr);
232
233         /* First time query for VF, set the mode here */
234         if (amdgpu_sriov_vf(xcp_mgr->adev) &&
235             xcp_mgr->mode == AMDGPU_XCP_MODE_NONE)
236                 xcp_mgr->mode = mode;
237
238         if (xcp_mgr->mode != AMDGPU_XCP_MODE_TRANS && mode != xcp_mgr->mode)
239                 dev_WARN(
240                         xcp_mgr->adev->dev,
241                         "Cached partition mode %d not matching with device mode %d",
242                         xcp_mgr->mode, mode);
243
244         if (!(flags & AMDGPU_XCP_FL_LOCKED))
245                 mutex_unlock(&xcp_mgr->xcp_lock);
246
247         return mode;
248 }
249
250 static int amdgpu_xcp_dev_alloc(struct amdgpu_device *adev)
251 {
252         struct drm_device *p_ddev;
253         struct drm_device *ddev;
254         int i, ret;
255
256         ddev = adev_to_drm(adev);
257
258         /* xcp #0 shares drm device setting with adev */
259         adev->xcp_mgr->xcp->ddev = ddev;
260
261         for (i = 1; i < MAX_XCP; i++) {
262                 ret = amdgpu_xcp_drm_dev_alloc(&p_ddev);
263                 if (ret == -ENOSPC) {
264                         dev_warn(adev->dev,
265                         "Skip xcp node #%d when out of drm node resource.", i);
266                         return 0;
267                 } else if (ret) {
268                         return ret;
269                 }
270
271                 /* Redirect all IOCTLs to the primary device */
272                 adev->xcp_mgr->xcp[i].rdev = p_ddev->render->dev;
273                 adev->xcp_mgr->xcp[i].pdev = p_ddev->primary->dev;
274                 adev->xcp_mgr->xcp[i].driver = (struct drm_driver *)p_ddev->driver;
275                 adev->xcp_mgr->xcp[i].vma_offset_manager = p_ddev->vma_offset_manager;
276                 p_ddev->render->dev = ddev;
277                 p_ddev->primary->dev = ddev;
278                 p_ddev->vma_offset_manager = ddev->vma_offset_manager;
279                 p_ddev->driver = &amdgpu_partition_driver;
280                 adev->xcp_mgr->xcp[i].ddev = p_ddev;
281         }
282
283         return 0;
284 }
285
286 int amdgpu_xcp_mgr_init(struct amdgpu_device *adev, int init_mode,
287                         int init_num_xcps,
288                         struct amdgpu_xcp_mgr_funcs *xcp_funcs)
289 {
290         struct amdgpu_xcp_mgr *xcp_mgr;
291
292         if (!xcp_funcs || !xcp_funcs->get_ip_details)
293                 return -EINVAL;
294
295         xcp_mgr = kzalloc(sizeof(*xcp_mgr), GFP_KERNEL);
296
297         if (!xcp_mgr)
298                 return -ENOMEM;
299
300         xcp_mgr->adev = adev;
301         xcp_mgr->funcs = xcp_funcs;
302         xcp_mgr->mode = init_mode;
303         mutex_init(&xcp_mgr->xcp_lock);
304
305         if (init_mode != AMDGPU_XCP_MODE_NONE)
306                 amdgpu_xcp_init(xcp_mgr, init_num_xcps, init_mode);
307
308         adev->xcp_mgr = xcp_mgr;
309
310         return amdgpu_xcp_dev_alloc(adev);
311 }
312
313 int amdgpu_xcp_get_partition(struct amdgpu_xcp_mgr *xcp_mgr,
314                              enum AMDGPU_XCP_IP_BLOCK ip, int instance)
315 {
316         struct amdgpu_xcp *xcp;
317         int i, id_mask = 0;
318
319         if (ip >= AMDGPU_XCP_MAX_BLOCKS)
320                 return -EINVAL;
321
322         for (i = 0; i < xcp_mgr->num_xcps; ++i) {
323                 xcp = &xcp_mgr->xcp[i];
324                 if ((xcp->valid) && (xcp->ip[ip].valid) &&
325                     (xcp->ip[ip].inst_mask & BIT(instance)))
326                         id_mask |= BIT(i);
327         }
328
329         if (!id_mask)
330                 id_mask = -ENXIO;
331
332         return id_mask;
333 }
334
335 int amdgpu_xcp_get_inst_details(struct amdgpu_xcp *xcp,
336                                 enum AMDGPU_XCP_IP_BLOCK ip,
337                                 uint32_t *inst_mask)
338 {
339         if (!xcp->valid || !inst_mask || !(xcp->ip[ip].valid))
340                 return -EINVAL;
341
342         *inst_mask = xcp->ip[ip].inst_mask;
343
344         return 0;
345 }
346
347 int amdgpu_xcp_dev_register(struct amdgpu_device *adev,
348                         const struct pci_device_id *ent)
349 {
350         int i, ret;
351
352         if (!adev->xcp_mgr)
353                 return 0;
354
355         for (i = 1; i < MAX_XCP; i++) {
356                 if (!adev->xcp_mgr->xcp[i].ddev)
357                         break;
358
359                 ret = drm_dev_register(adev->xcp_mgr->xcp[i].ddev, ent->driver_data);
360                 if (ret)
361                         return ret;
362         }
363
364         return 0;
365 }
366
367 void amdgpu_xcp_dev_unplug(struct amdgpu_device *adev)
368 {
369         struct drm_device *p_ddev;
370         int i;
371
372         if (!adev->xcp_mgr)
373                 return;
374
375         for (i = 1; i < MAX_XCP; i++) {
376                 if (!adev->xcp_mgr->xcp[i].ddev)
377                         break;
378
379                 p_ddev = adev->xcp_mgr->xcp[i].ddev;
380                 drm_dev_unplug(p_ddev);
381                 p_ddev->render->dev = adev->xcp_mgr->xcp[i].rdev;
382                 p_ddev->primary->dev = adev->xcp_mgr->xcp[i].pdev;
383                 p_ddev->driver =  adev->xcp_mgr->xcp[i].driver;
384                 p_ddev->vma_offset_manager = adev->xcp_mgr->xcp[i].vma_offset_manager;
385         }
386 }
387
388 int amdgpu_xcp_open_device(struct amdgpu_device *adev,
389                            struct amdgpu_fpriv *fpriv,
390                            struct drm_file *file_priv)
391 {
392         int i;
393
394         if (!adev->xcp_mgr)
395                 return 0;
396
397         fpriv->xcp_id = AMDGPU_XCP_NO_PARTITION;
398         for (i = 0; i < MAX_XCP; ++i) {
399                 if (!adev->xcp_mgr->xcp[i].ddev)
400                         break;
401
402                 if (file_priv->minor == adev->xcp_mgr->xcp[i].ddev->render) {
403                         if (adev->xcp_mgr->xcp[i].valid == FALSE) {
404                                 dev_err(adev->dev, "renderD%d partition %d not valid!",
405                                                 file_priv->minor->index, i);
406                                 return -ENOENT;
407                         }
408                         dev_dbg(adev->dev, "renderD%d partition %d opened!",
409                                         file_priv->minor->index, i);
410                         fpriv->xcp_id = i;
411                         break;
412                 }
413         }
414
415         fpriv->vm.mem_id = fpriv->xcp_id == AMDGPU_XCP_NO_PARTITION ? -1 :
416                                 adev->xcp_mgr->xcp[fpriv->xcp_id].mem_id;
417         return 0;
418 }
419
420 void amdgpu_xcp_release_sched(struct amdgpu_device *adev,
421                                   struct amdgpu_ctx_entity *entity)
422 {
423         struct drm_gpu_scheduler *sched;
424         struct amdgpu_ring *ring;
425
426         if (!adev->xcp_mgr)
427                 return;
428
429         sched = entity->entity.rq->sched;
430         if (sched->ready) {
431                 ring = to_amdgpu_ring(entity->entity.rq->sched);
432                 atomic_dec(&adev->xcp_mgr->xcp[ring->xcp_id].ref_cnt);
433         }
434 }
435
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