]> Git Repo - linux.git/blob - drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
Merge branch 'smp-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[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                 /* Using pipes 2/3 from MEC 2 seems cause problems */
183                 if (mec == 1 && pipe > 1)
184                         continue;
185
186                 ring->me = mec + 1;
187                 ring->pipe = pipe;
188                 ring->queue = queue;
189
190                 return 0;
191         }
192
193         dev_err(adev->dev, "Failed to find a queue for KIQ\n");
194         return -EINVAL;
195 }
196
197 int amdgpu_gfx_kiq_init_ring(struct amdgpu_device *adev,
198                              struct amdgpu_ring *ring,
199                              struct amdgpu_irq_src *irq)
200 {
201         struct amdgpu_kiq *kiq = &adev->gfx.kiq;
202         int r = 0;
203
204         spin_lock_init(&kiq->ring_lock);
205
206         r = amdgpu_wb_get(adev, &adev->virt.reg_val_offs);
207         if (r)
208                 return r;
209
210         ring->adev = NULL;
211         ring->ring_obj = NULL;
212         ring->use_doorbell = true;
213         ring->doorbell_index = AMDGPU_DOORBELL_KIQ;
214
215         r = amdgpu_gfx_kiq_acquire(adev, ring);
216         if (r)
217                 return r;
218
219         ring->eop_gpu_addr = kiq->eop_gpu_addr;
220         sprintf(ring->name, "kiq_%d.%d.%d", ring->me, ring->pipe, ring->queue);
221         r = amdgpu_ring_init(adev, ring, 1024,
222                              irq, AMDGPU_CP_KIQ_IRQ_DRIVER0);
223         if (r)
224                 dev_warn(adev->dev, "(%d) failed to init kiq ring\n", r);
225
226         return r;
227 }
228
229 void amdgpu_gfx_kiq_free_ring(struct amdgpu_ring *ring,
230                               struct amdgpu_irq_src *irq)
231 {
232         amdgpu_wb_free(ring->adev, ring->adev->virt.reg_val_offs);
233         amdgpu_ring_fini(ring);
234 }
235
236 void amdgpu_gfx_kiq_fini(struct amdgpu_device *adev)
237 {
238         struct amdgpu_kiq *kiq = &adev->gfx.kiq;
239
240         amdgpu_bo_free_kernel(&kiq->eop_obj, &kiq->eop_gpu_addr, NULL);
241 }
242
243 int amdgpu_gfx_kiq_init(struct amdgpu_device *adev,
244                         unsigned hpd_size)
245 {
246         int r;
247         u32 *hpd;
248         struct amdgpu_kiq *kiq = &adev->gfx.kiq;
249
250         r = amdgpu_bo_create_kernel(adev, hpd_size, PAGE_SIZE,
251                                     AMDGPU_GEM_DOMAIN_GTT, &kiq->eop_obj,
252                                     &kiq->eop_gpu_addr, (void **)&hpd);
253         if (r) {
254                 dev_warn(adev->dev, "failed to create KIQ bo (%d).\n", r);
255                 return r;
256         }
257
258         memset(hpd, 0, hpd_size);
259
260         r = amdgpu_bo_reserve(kiq->eop_obj, true);
261         if (unlikely(r != 0))
262                 dev_warn(adev->dev, "(%d) reserve kiq eop bo failed\n", r);
263         amdgpu_bo_kunmap(kiq->eop_obj);
264         amdgpu_bo_unreserve(kiq->eop_obj);
265
266         return 0;
267 }
268
269 /* create MQD for each compute queue */
270 int amdgpu_gfx_compute_mqd_sw_init(struct amdgpu_device *adev,
271                                    unsigned mqd_size)
272 {
273         struct amdgpu_ring *ring = NULL;
274         int r, i;
275
276         /* create MQD for KIQ */
277         ring = &adev->gfx.kiq.ring;
278         if (!ring->mqd_obj) {
279                 /* originaly the KIQ MQD is put in GTT domain, but for SRIOV VRAM domain is a must
280                  * otherwise hypervisor trigger SAVE_VF fail after driver unloaded which mean MQD
281                  * deallocated and gart_unbind, to strict diverage we decide to use VRAM domain for
282                  * KIQ MQD no matter SRIOV or Bare-metal
283                  */
284                 r = amdgpu_bo_create_kernel(adev, mqd_size, PAGE_SIZE,
285                                             AMDGPU_GEM_DOMAIN_VRAM, &ring->mqd_obj,
286                                             &ring->mqd_gpu_addr, &ring->mqd_ptr);
287                 if (r) {
288                         dev_warn(adev->dev, "failed to create ring mqd ob (%d)", r);
289                         return r;
290                 }
291
292                 /* prepare MQD backup */
293                 adev->gfx.mec.mqd_backup[AMDGPU_MAX_COMPUTE_RINGS] = kmalloc(mqd_size, GFP_KERNEL);
294                 if (!adev->gfx.mec.mqd_backup[AMDGPU_MAX_COMPUTE_RINGS])
295                                 dev_warn(adev->dev, "no memory to create MQD backup for ring %s\n", ring->name);
296         }
297
298         /* create MQD for each KCQ */
299         for (i = 0; i < adev->gfx.num_compute_rings; i++) {
300                 ring = &adev->gfx.compute_ring[i];
301                 if (!ring->mqd_obj) {
302                         r = amdgpu_bo_create_kernel(adev, mqd_size, PAGE_SIZE,
303                                                     AMDGPU_GEM_DOMAIN_GTT, &ring->mqd_obj,
304                                                     &ring->mqd_gpu_addr, &ring->mqd_ptr);
305                         if (r) {
306                                 dev_warn(adev->dev, "failed to create ring mqd ob (%d)", r);
307                                 return r;
308                         }
309
310                         /* prepare MQD backup */
311                         adev->gfx.mec.mqd_backup[i] = kmalloc(mqd_size, GFP_KERNEL);
312                         if (!adev->gfx.mec.mqd_backup[i])
313                                 dev_warn(adev->dev, "no memory to create MQD backup for ring %s\n", ring->name);
314                 }
315         }
316
317         return 0;
318 }
319
320 void amdgpu_gfx_compute_mqd_sw_fini(struct amdgpu_device *adev)
321 {
322         struct amdgpu_ring *ring = NULL;
323         int i;
324
325         for (i = 0; i < adev->gfx.num_compute_rings; i++) {
326                 ring = &adev->gfx.compute_ring[i];
327                 kfree(adev->gfx.mec.mqd_backup[i]);
328                 amdgpu_bo_free_kernel(&ring->mqd_obj,
329                                       &ring->mqd_gpu_addr,
330                                       &ring->mqd_ptr);
331         }
332
333         ring = &adev->gfx.kiq.ring;
334         kfree(adev->gfx.mec.mqd_backup[AMDGPU_MAX_COMPUTE_RINGS]);
335         amdgpu_bo_free_kernel(&ring->mqd_obj,
336                               &ring->mqd_gpu_addr,
337                               &ring->mqd_ptr);
338 }
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