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Merge tag 'for-v4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux...
[linux.git] / drivers / gpu / drm / amd / amdgpu / amdgpu_gfx.c
1 /*
2  * Copyright 2014 Advanced Micro Devices, Inc.
3  * Copyright 2008 Red Hat Inc.
4  * Copyright 2009 Jerome Glisse.
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a
7  * copy of this software and associated documentation files (the "Software"),
8  * to deal in the Software without restriction, including without limitation
9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10  * and/or sell copies of the Software, and to permit persons to whom the
11  * Software is furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be included in
14  * all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22  * OTHER DEALINGS IN THE SOFTWARE.
23  *
24  */
25 #include <drm/drmP.h>
26 #include "amdgpu.h"
27 #include "amdgpu_gfx.h"
28
29 /*
30  * GPU scratch registers helpers function.
31  */
32 /**
33  * amdgpu_gfx_scratch_get - Allocate a scratch register
34  *
35  * @adev: amdgpu_device pointer
36  * @reg: scratch register mmio offset
37  *
38  * Allocate a CP scratch register for use by the driver (all asics).
39  * Returns 0 on success or -EINVAL on failure.
40  */
41 int amdgpu_gfx_scratch_get(struct amdgpu_device *adev, uint32_t *reg)
42 {
43         int i;
44
45         i = ffs(adev->gfx.scratch.free_mask);
46         if (i != 0 && i <= adev->gfx.scratch.num_reg) {
47                 i--;
48                 adev->gfx.scratch.free_mask &= ~(1u << i);
49                 *reg = adev->gfx.scratch.reg_base + i;
50                 return 0;
51         }
52         return -EINVAL;
53 }
54
55 /**
56  * amdgpu_gfx_scratch_free - Free a scratch register
57  *
58  * @adev: amdgpu_device pointer
59  * @reg: scratch register mmio offset
60  *
61  * Free a CP scratch register allocated for use by the driver (all asics)
62  */
63 void amdgpu_gfx_scratch_free(struct amdgpu_device *adev, uint32_t reg)
64 {
65         adev->gfx.scratch.free_mask |= 1u << (reg - adev->gfx.scratch.reg_base);
66 }
67
68 /**
69  * amdgpu_gfx_parse_disable_cu - Parse the disable_cu module parameter
70  *
71  * @mask: array in which the per-shader array disable masks will be stored
72  * @max_se: number of SEs
73  * @max_sh: number of SHs
74  *
75  * The bitmask of CUs to be disabled in the shader array determined by se and
76  * sh is stored in mask[se * max_sh + sh].
77  */
78 void amdgpu_gfx_parse_disable_cu(unsigned *mask, unsigned max_se, unsigned max_sh)
79 {
80         unsigned se, sh, cu;
81         const char *p;
82
83         memset(mask, 0, sizeof(*mask) * max_se * max_sh);
84
85         if (!amdgpu_disable_cu || !*amdgpu_disable_cu)
86                 return;
87
88         p = amdgpu_disable_cu;
89         for (;;) {
90                 char *next;
91                 int ret = sscanf(p, "%u.%u.%u", &se, &sh, &cu);
92                 if (ret < 3) {
93                         DRM_ERROR("amdgpu: could not parse disable_cu\n");
94                         return;
95                 }
96
97                 if (se < max_se && sh < max_sh && cu < 16) {
98                         DRM_INFO("amdgpu: disabling CU %u.%u.%u\n", se, sh, cu);
99                         mask[se * max_sh + sh] |= 1u << cu;
100                 } else {
101                         DRM_ERROR("amdgpu: disable_cu %u.%u.%u is out of range\n",
102                                   se, sh, cu);
103                 }
104
105                 next = strchr(p, ',');
106                 if (!next)
107                         break;
108                 p = next + 1;
109         }
110 }
111
112 static bool amdgpu_gfx_is_multipipe_capable(struct amdgpu_device *adev)
113 {
114         if (amdgpu_compute_multipipe != -1) {
115                 DRM_INFO("amdgpu: forcing compute pipe policy %d\n",
116                          amdgpu_compute_multipipe);
117                 return amdgpu_compute_multipipe == 1;
118         }
119
120         /* FIXME: spreading the queues across pipes causes perf regressions
121          * on POLARIS11 compute workloads */
122         if (adev->asic_type == CHIP_POLARIS11)
123                 return false;
124
125         return adev->gfx.mec.num_mec > 1;
126 }
127
128 void amdgpu_gfx_compute_queue_acquire(struct amdgpu_device *adev)
129 {
130         int i, queue, pipe, mec;
131         bool multipipe_policy = amdgpu_gfx_is_multipipe_capable(adev);
132
133         /* policy for amdgpu compute queue ownership */
134         for (i = 0; i < AMDGPU_MAX_COMPUTE_QUEUES; ++i) {
135                 queue = i % adev->gfx.mec.num_queue_per_pipe;
136                 pipe = (i / adev->gfx.mec.num_queue_per_pipe)
137                         % adev->gfx.mec.num_pipe_per_mec;
138                 mec = (i / adev->gfx.mec.num_queue_per_pipe)
139                         / adev->gfx.mec.num_pipe_per_mec;
140
141                 /* we've run out of HW */
142                 if (mec >= adev->gfx.mec.num_mec)
143                         break;
144
145                 if (multipipe_policy) {
146                         /* policy: amdgpu owns the first two queues of the first MEC */
147                         if (mec == 0 && queue < 2)
148                                 set_bit(i, adev->gfx.mec.queue_bitmap);
149                 } else {
150                         /* policy: amdgpu owns all queues in the first pipe */
151                         if (mec == 0 && pipe == 0)
152                                 set_bit(i, adev->gfx.mec.queue_bitmap);
153                 }
154         }
155
156         /* update the number of active compute rings */
157         adev->gfx.num_compute_rings =
158                 bitmap_weight(adev->gfx.mec.queue_bitmap, AMDGPU_MAX_COMPUTE_QUEUES);
159
160         /* If you hit this case and edited the policy, you probably just
161          * need to increase AMDGPU_MAX_COMPUTE_RINGS */
162         if (WARN_ON(adev->gfx.num_compute_rings > AMDGPU_MAX_COMPUTE_RINGS))
163                 adev->gfx.num_compute_rings = AMDGPU_MAX_COMPUTE_RINGS;
164 }
165
166 static int amdgpu_gfx_kiq_acquire(struct amdgpu_device *adev,
167                                   struct amdgpu_ring *ring)
168 {
169         int queue_bit;
170         int mec, pipe, queue;
171
172         queue_bit = adev->gfx.mec.num_mec
173                     * adev->gfx.mec.num_pipe_per_mec
174                     * adev->gfx.mec.num_queue_per_pipe;
175
176         while (queue_bit-- >= 0) {
177                 if (test_bit(queue_bit, adev->gfx.mec.queue_bitmap))
178                         continue;
179
180                 amdgpu_gfx_bit_to_queue(adev, queue_bit, &mec, &pipe, &queue);
181
182                 /*
183                  * 1. Using pipes 2/3 from MEC 2 seems cause problems.
184                  * 2. It must use queue id 0, because CGPG_IDLE/SAVE/LOAD/RUN
185                  * only can be issued on queue 0.
186                  */
187                 if ((mec == 1 && pipe > 1) || queue != 0)
188                         continue;
189
190                 ring->me = mec + 1;
191                 ring->pipe = pipe;
192                 ring->queue = queue;
193
194                 return 0;
195         }
196
197         dev_err(adev->dev, "Failed to find a queue for KIQ\n");
198         return -EINVAL;
199 }
200
201 int amdgpu_gfx_kiq_init_ring(struct amdgpu_device *adev,
202                              struct amdgpu_ring *ring,
203                              struct amdgpu_irq_src *irq)
204 {
205         struct amdgpu_kiq *kiq = &adev->gfx.kiq;
206         int r = 0;
207
208         spin_lock_init(&kiq->ring_lock);
209
210         r = amdgpu_device_wb_get(adev, &adev->virt.reg_val_offs);
211         if (r)
212                 return r;
213
214         ring->adev = NULL;
215         ring->ring_obj = NULL;
216         ring->use_doorbell = true;
217         ring->doorbell_index = AMDGPU_DOORBELL_KIQ;
218
219         r = amdgpu_gfx_kiq_acquire(adev, ring);
220         if (r)
221                 return r;
222
223         ring->eop_gpu_addr = kiq->eop_gpu_addr;
224         sprintf(ring->name, "kiq_%d.%d.%d", ring->me, ring->pipe, ring->queue);
225         r = amdgpu_ring_init(adev, ring, 1024,
226                              irq, AMDGPU_CP_KIQ_IRQ_DRIVER0);
227         if (r)
228                 dev_warn(adev->dev, "(%d) failed to init kiq ring\n", r);
229
230         return r;
231 }
232
233 void amdgpu_gfx_kiq_free_ring(struct amdgpu_ring *ring,
234                               struct amdgpu_irq_src *irq)
235 {
236         amdgpu_device_wb_free(ring->adev, ring->adev->virt.reg_val_offs);
237         amdgpu_ring_fini(ring);
238 }
239
240 void amdgpu_gfx_kiq_fini(struct amdgpu_device *adev)
241 {
242         struct amdgpu_kiq *kiq = &adev->gfx.kiq;
243
244         amdgpu_bo_free_kernel(&kiq->eop_obj, &kiq->eop_gpu_addr, NULL);
245 }
246
247 int amdgpu_gfx_kiq_init(struct amdgpu_device *adev,
248                         unsigned hpd_size)
249 {
250         int r;
251         u32 *hpd;
252         struct amdgpu_kiq *kiq = &adev->gfx.kiq;
253
254         r = amdgpu_bo_create_kernel(adev, hpd_size, PAGE_SIZE,
255                                     AMDGPU_GEM_DOMAIN_GTT, &kiq->eop_obj,
256                                     &kiq->eop_gpu_addr, (void **)&hpd);
257         if (r) {
258                 dev_warn(adev->dev, "failed to create KIQ bo (%d).\n", r);
259                 return r;
260         }
261
262         memset(hpd, 0, hpd_size);
263
264         r = amdgpu_bo_reserve(kiq->eop_obj, true);
265         if (unlikely(r != 0))
266                 dev_warn(adev->dev, "(%d) reserve kiq eop bo failed\n", r);
267         amdgpu_bo_kunmap(kiq->eop_obj);
268         amdgpu_bo_unreserve(kiq->eop_obj);
269
270         return 0;
271 }
272
273 /* create MQD for each compute queue */
274 int amdgpu_gfx_compute_mqd_sw_init(struct amdgpu_device *adev,
275                                    unsigned mqd_size)
276 {
277         struct amdgpu_ring *ring = NULL;
278         int r, i;
279
280         /* create MQD for KIQ */
281         ring = &adev->gfx.kiq.ring;
282         if (!ring->mqd_obj) {
283                 /* originaly the KIQ MQD is put in GTT domain, but for SRIOV VRAM domain is a must
284                  * otherwise hypervisor trigger SAVE_VF fail after driver unloaded which mean MQD
285                  * deallocated and gart_unbind, to strict diverage we decide to use VRAM domain for
286                  * KIQ MQD no matter SRIOV or Bare-metal
287                  */
288                 r = amdgpu_bo_create_kernel(adev, mqd_size, PAGE_SIZE,
289                                             AMDGPU_GEM_DOMAIN_VRAM, &ring->mqd_obj,
290                                             &ring->mqd_gpu_addr, &ring->mqd_ptr);
291                 if (r) {
292                         dev_warn(adev->dev, "failed to create ring mqd ob (%d)", r);
293                         return r;
294                 }
295
296                 /* prepare MQD backup */
297                 adev->gfx.mec.mqd_backup[AMDGPU_MAX_COMPUTE_RINGS] = kmalloc(mqd_size, GFP_KERNEL);
298                 if (!adev->gfx.mec.mqd_backup[AMDGPU_MAX_COMPUTE_RINGS])
299                                 dev_warn(adev->dev, "no memory to create MQD backup for ring %s\n", ring->name);
300         }
301
302         /* create MQD for each KCQ */
303         for (i = 0; i < adev->gfx.num_compute_rings; i++) {
304                 ring = &adev->gfx.compute_ring[i];
305                 if (!ring->mqd_obj) {
306                         r = amdgpu_bo_create_kernel(adev, mqd_size, PAGE_SIZE,
307                                                     AMDGPU_GEM_DOMAIN_GTT, &ring->mqd_obj,
308                                                     &ring->mqd_gpu_addr, &ring->mqd_ptr);
309                         if (r) {
310                                 dev_warn(adev->dev, "failed to create ring mqd ob (%d)", r);
311                                 return r;
312                         }
313
314                         /* prepare MQD backup */
315                         adev->gfx.mec.mqd_backup[i] = kmalloc(mqd_size, GFP_KERNEL);
316                         if (!adev->gfx.mec.mqd_backup[i])
317                                 dev_warn(adev->dev, "no memory to create MQD backup for ring %s\n", ring->name);
318                 }
319         }
320
321         return 0;
322 }
323
324 void amdgpu_gfx_compute_mqd_sw_fini(struct amdgpu_device *adev)
325 {
326         struct amdgpu_ring *ring = NULL;
327         int i;
328
329         for (i = 0; i < adev->gfx.num_compute_rings; i++) {
330                 ring = &adev->gfx.compute_ring[i];
331                 kfree(adev->gfx.mec.mqd_backup[i]);
332                 amdgpu_bo_free_kernel(&ring->mqd_obj,
333                                       &ring->mqd_gpu_addr,
334                                       &ring->mqd_ptr);
335         }
336
337         ring = &adev->gfx.kiq.ring;
338         kfree(adev->gfx.mec.mqd_backup[AMDGPU_MAX_COMPUTE_RINGS]);
339         amdgpu_bo_free_kernel(&ring->mqd_obj,
340                               &ring->mqd_gpu_addr,
341                               &ring->mqd_ptr);
342 }
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