Merge branch 'topic/ice1724-pm' into for-linus
[pandora-kernel.git] / drivers / gpu / drm / radeon / radeon_ring.c
1 /*
2  * Copyright 2008 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  * Authors: Dave Airlie
25  *          Alex Deucher
26  *          Jerome Glisse
27  */
28 #include <linux/seq_file.h>
29 #include "drmP.h"
30 #include "radeon_drm.h"
31 #include "radeon_reg.h"
32 #include "radeon.h"
33 #include "atom.h"
34
35 int radeon_debugfs_ib_init(struct radeon_device *rdev);
36
37 /*
38  * IB.
39  */
40 int radeon_ib_get(struct radeon_device *rdev, struct radeon_ib **ib)
41 {
42         struct radeon_fence *fence;
43         struct radeon_ib *nib;
44         unsigned long i;
45         int r = 0;
46
47         *ib = NULL;
48         r = radeon_fence_create(rdev, &fence);
49         if (r) {
50                 DRM_ERROR("failed to create fence for new IB\n");
51                 return r;
52         }
53         mutex_lock(&rdev->ib_pool.mutex);
54         i = find_first_zero_bit(rdev->ib_pool.alloc_bm, RADEON_IB_POOL_SIZE);
55         if (i < RADEON_IB_POOL_SIZE) {
56                 set_bit(i, rdev->ib_pool.alloc_bm);
57                 rdev->ib_pool.ibs[i].length_dw = 0;
58                 *ib = &rdev->ib_pool.ibs[i];
59                 goto out;
60         }
61         if (list_empty(&rdev->ib_pool.scheduled_ibs)) {
62                 /* we go do nothings here */
63                 DRM_ERROR("all IB allocated none scheduled.\n");
64                 r = -EINVAL;
65                 goto out;
66         }
67         /* get the first ib on the scheduled list */
68         nib = list_entry(rdev->ib_pool.scheduled_ibs.next,
69                          struct radeon_ib, list);
70         if (nib->fence == NULL) {
71                 /* we go do nothings here */
72                 DRM_ERROR("IB %lu scheduled without a fence.\n", nib->idx);
73                 r = -EINVAL;
74                 goto out;
75         }
76         r = radeon_fence_wait(nib->fence, false);
77         if (r) {
78                 DRM_ERROR("radeon: IB(%lu:0x%016lX:%u)\n", nib->idx,
79                           (unsigned long)nib->gpu_addr, nib->length_dw);
80                 DRM_ERROR("radeon: GPU lockup detected, fail to get a IB\n");
81                 goto out;
82         }
83         radeon_fence_unref(&nib->fence);
84         nib->length_dw = 0;
85         list_del(&nib->list);
86         INIT_LIST_HEAD(&nib->list);
87         *ib = nib;
88 out:
89         mutex_unlock(&rdev->ib_pool.mutex);
90         if (r) {
91                 radeon_fence_unref(&fence);
92         } else {
93                 (*ib)->fence = fence;
94         }
95         return r;
96 }
97
98 void radeon_ib_free(struct radeon_device *rdev, struct radeon_ib **ib)
99 {
100         struct radeon_ib *tmp = *ib;
101
102         *ib = NULL;
103         if (tmp == NULL) {
104                 return;
105         }
106         mutex_lock(&rdev->ib_pool.mutex);
107         if (!list_empty(&tmp->list) && !radeon_fence_signaled(tmp->fence)) {
108                 /* IB is scheduled & not signaled don't do anythings */
109                 mutex_unlock(&rdev->ib_pool.mutex);
110                 return;
111         }
112         list_del(&tmp->list);
113         INIT_LIST_HEAD(&tmp->list);
114         if (tmp->fence) {
115                 radeon_fence_unref(&tmp->fence);
116         }
117         tmp->length_dw = 0;
118         clear_bit(tmp->idx, rdev->ib_pool.alloc_bm);
119         mutex_unlock(&rdev->ib_pool.mutex);
120 }
121
122 static void radeon_ib_align(struct radeon_device *rdev, struct radeon_ib *ib)
123 {
124         while ((ib->length_dw & rdev->cp.align_mask)) {
125                 ib->ptr[ib->length_dw++] = PACKET2(0);
126         }
127 }
128
129 int radeon_ib_schedule(struct radeon_device *rdev, struct radeon_ib *ib)
130 {
131         int r = 0;
132
133         mutex_lock(&rdev->ib_pool.mutex);
134         radeon_ib_align(rdev, ib);
135         if (!ib->length_dw || !rdev->cp.ready) {
136                 /* TODO: Nothings in the ib we should report. */
137                 mutex_unlock(&rdev->ib_pool.mutex);
138                 DRM_ERROR("radeon: couldn't schedule IB(%lu).\n", ib->idx);
139                 return -EINVAL;
140         }
141         /* 64 dwords should be enough for fence too */
142         r = radeon_ring_lock(rdev, 64);
143         if (r) {
144                 DRM_ERROR("radeon: scheduling IB failled (%d).\n", r);
145                 mutex_unlock(&rdev->ib_pool.mutex);
146                 return r;
147         }
148         radeon_ring_write(rdev, PACKET0(RADEON_CP_IB_BASE, 1));
149         radeon_ring_write(rdev, ib->gpu_addr);
150         radeon_ring_write(rdev, ib->length_dw);
151         radeon_fence_emit(rdev, ib->fence);
152         radeon_ring_unlock_commit(rdev);
153         list_add_tail(&ib->list, &rdev->ib_pool.scheduled_ibs);
154         mutex_unlock(&rdev->ib_pool.mutex);
155         return 0;
156 }
157
158 int radeon_ib_pool_init(struct radeon_device *rdev)
159 {
160         void *ptr;
161         uint64_t gpu_addr;
162         int i;
163         int r = 0;
164
165         /* Allocate 1M object buffer */
166         INIT_LIST_HEAD(&rdev->ib_pool.scheduled_ibs);
167         r = radeon_object_create(rdev, NULL,  RADEON_IB_POOL_SIZE*64*1024,
168                                  true, RADEON_GEM_DOMAIN_GTT,
169                                  false, &rdev->ib_pool.robj);
170         if (r) {
171                 DRM_ERROR("radeon: failed to ib pool (%d).\n", r);
172                 return r;
173         }
174         r = radeon_object_pin(rdev->ib_pool.robj, RADEON_GEM_DOMAIN_GTT, &gpu_addr);
175         if (r) {
176                 DRM_ERROR("radeon: failed to pin ib pool (%d).\n", r);
177                 return r;
178         }
179         r = radeon_object_kmap(rdev->ib_pool.robj, &ptr);
180         if (r) {
181                 DRM_ERROR("radeon: failed to map ib poll (%d).\n", r);
182                 return r;
183         }
184         for (i = 0; i < RADEON_IB_POOL_SIZE; i++) {
185                 unsigned offset;
186
187                 offset = i * 64 * 1024;
188                 rdev->ib_pool.ibs[i].gpu_addr = gpu_addr + offset;
189                 rdev->ib_pool.ibs[i].ptr = ptr + offset;
190                 rdev->ib_pool.ibs[i].idx = i;
191                 rdev->ib_pool.ibs[i].length_dw = 0;
192                 INIT_LIST_HEAD(&rdev->ib_pool.ibs[i].list);
193         }
194         bitmap_zero(rdev->ib_pool.alloc_bm, RADEON_IB_POOL_SIZE);
195         rdev->ib_pool.ready = true;
196         DRM_INFO("radeon: ib pool ready.\n");
197         if (radeon_debugfs_ib_init(rdev)) {
198                 DRM_ERROR("Failed to register debugfs file for IB !\n");
199         }
200         return r;
201 }
202
203 void radeon_ib_pool_fini(struct radeon_device *rdev)
204 {
205         if (!rdev->ib_pool.ready) {
206                 return;
207         }
208         mutex_lock(&rdev->ib_pool.mutex);
209         bitmap_zero(rdev->ib_pool.alloc_bm, RADEON_IB_POOL_SIZE);
210         if (rdev->ib_pool.robj) {
211                 radeon_object_kunmap(rdev->ib_pool.robj);
212                 radeon_object_unref(&rdev->ib_pool.robj);
213                 rdev->ib_pool.robj = NULL;
214         }
215         mutex_unlock(&rdev->ib_pool.mutex);
216 }
217
218 int radeon_ib_test(struct radeon_device *rdev)
219 {
220         struct radeon_ib *ib;
221         uint32_t scratch;
222         uint32_t tmp = 0;
223         unsigned i;
224         int r;
225
226         r = radeon_scratch_get(rdev, &scratch);
227         if (r) {
228                 DRM_ERROR("radeon: failed to get scratch reg (%d).\n", r);
229                 return r;
230         }
231         WREG32(scratch, 0xCAFEDEAD);
232         r = radeon_ib_get(rdev, &ib);
233         if (r) {
234                 return r;
235         }
236         ib->ptr[0] = PACKET0(scratch, 0);
237         ib->ptr[1] = 0xDEADBEEF;
238         ib->ptr[2] = PACKET2(0);
239         ib->ptr[3] = PACKET2(0);
240         ib->ptr[4] = PACKET2(0);
241         ib->ptr[5] = PACKET2(0);
242         ib->ptr[6] = PACKET2(0);
243         ib->ptr[7] = PACKET2(0);
244         ib->length_dw = 8;
245         r = radeon_ib_schedule(rdev, ib);
246         if (r) {
247                 radeon_scratch_free(rdev, scratch);
248                 radeon_ib_free(rdev, &ib);
249                 return r;
250         }
251         r = radeon_fence_wait(ib->fence, false);
252         if (r) {
253                 return r;
254         }
255         for (i = 0; i < rdev->usec_timeout; i++) {
256                 tmp = RREG32(scratch);
257                 if (tmp == 0xDEADBEEF) {
258                         break;
259                 }
260                 DRM_UDELAY(1);
261         }
262         if (i < rdev->usec_timeout) {
263                 DRM_INFO("ib test succeeded in %u usecs\n", i);
264         } else {
265                 DRM_ERROR("radeon: ib test failed (sracth(0x%04X)=0x%08X)\n",
266                           scratch, tmp);
267                 r = -EINVAL;
268         }
269         radeon_scratch_free(rdev, scratch);
270         radeon_ib_free(rdev, &ib);
271         return r;
272 }
273
274
275 /*
276  * Ring.
277  */
278 void radeon_ring_free_size(struct radeon_device *rdev)
279 {
280         rdev->cp.rptr = RREG32(RADEON_CP_RB_RPTR);
281         /* This works because ring_size is a power of 2 */
282         rdev->cp.ring_free_dw = (rdev->cp.rptr + (rdev->cp.ring_size / 4));
283         rdev->cp.ring_free_dw -= rdev->cp.wptr;
284         rdev->cp.ring_free_dw &= rdev->cp.ptr_mask;
285         if (!rdev->cp.ring_free_dw) {
286                 rdev->cp.ring_free_dw = rdev->cp.ring_size / 4;
287         }
288 }
289
290 int radeon_ring_lock(struct radeon_device *rdev, unsigned ndw)
291 {
292         int r;
293
294         /* Align requested size with padding so unlock_commit can
295          * pad safely */
296         ndw = (ndw + rdev->cp.align_mask) & ~rdev->cp.align_mask;
297         mutex_lock(&rdev->cp.mutex);
298         while (ndw > (rdev->cp.ring_free_dw - 1)) {
299                 radeon_ring_free_size(rdev);
300                 if (ndw < rdev->cp.ring_free_dw) {
301                         break;
302                 }
303                 r = radeon_fence_wait_next(rdev);
304                 if (r) {
305                         mutex_unlock(&rdev->cp.mutex);
306                         return r;
307                 }
308         }
309         rdev->cp.count_dw = ndw;
310         rdev->cp.wptr_old = rdev->cp.wptr;
311         return 0;
312 }
313
314 void radeon_ring_unlock_commit(struct radeon_device *rdev)
315 {
316         unsigned count_dw_pad;
317         unsigned i;
318
319         /* We pad to match fetch size */
320         count_dw_pad = (rdev->cp.align_mask + 1) -
321                        (rdev->cp.wptr & rdev->cp.align_mask);
322         for (i = 0; i < count_dw_pad; i++) {
323                 radeon_ring_write(rdev, PACKET2(0));
324         }
325         DRM_MEMORYBARRIER();
326         WREG32(RADEON_CP_RB_WPTR, rdev->cp.wptr);
327         (void)RREG32(RADEON_CP_RB_WPTR);
328         mutex_unlock(&rdev->cp.mutex);
329 }
330
331 void radeon_ring_unlock_undo(struct radeon_device *rdev)
332 {
333         rdev->cp.wptr = rdev->cp.wptr_old;
334         mutex_unlock(&rdev->cp.mutex);
335 }
336
337 int radeon_ring_test(struct radeon_device *rdev)
338 {
339         uint32_t scratch;
340         uint32_t tmp = 0;
341         unsigned i;
342         int r;
343
344         r = radeon_scratch_get(rdev, &scratch);
345         if (r) {
346                 DRM_ERROR("radeon: cp failed to get scratch reg (%d).\n", r);
347                 return r;
348         }
349         WREG32(scratch, 0xCAFEDEAD);
350         r = radeon_ring_lock(rdev, 2);
351         if (r) {
352                 DRM_ERROR("radeon: cp failed to lock ring (%d).\n", r);
353                 radeon_scratch_free(rdev, scratch);
354                 return r;
355         }
356         radeon_ring_write(rdev, PACKET0(scratch, 0));
357         radeon_ring_write(rdev, 0xDEADBEEF);
358         radeon_ring_unlock_commit(rdev);
359         for (i = 0; i < rdev->usec_timeout; i++) {
360                 tmp = RREG32(scratch);
361                 if (tmp == 0xDEADBEEF) {
362                         break;
363                 }
364                 DRM_UDELAY(1);
365         }
366         if (i < rdev->usec_timeout) {
367                 DRM_INFO("ring test succeeded in %d usecs\n", i);
368         } else {
369                 DRM_ERROR("radeon: ring test failed (sracth(0x%04X)=0x%08X)\n",
370                           scratch, tmp);
371                 r = -EINVAL;
372         }
373         radeon_scratch_free(rdev, scratch);
374         return r;
375 }
376
377 int radeon_ring_init(struct radeon_device *rdev, unsigned ring_size)
378 {
379         int r;
380
381         rdev->cp.ring_size = ring_size;
382         /* Allocate ring buffer */
383         if (rdev->cp.ring_obj == NULL) {
384                 r = radeon_object_create(rdev, NULL, rdev->cp.ring_size,
385                                          true,
386                                          RADEON_GEM_DOMAIN_GTT,
387                                          false,
388                                          &rdev->cp.ring_obj);
389                 if (r) {
390                         DRM_ERROR("radeon: failed to create ring buffer (%d).\n", r);
391                         mutex_unlock(&rdev->cp.mutex);
392                         return r;
393                 }
394                 r = radeon_object_pin(rdev->cp.ring_obj,
395                                       RADEON_GEM_DOMAIN_GTT,
396                                       &rdev->cp.gpu_addr);
397                 if (r) {
398                         DRM_ERROR("radeon: failed to pin ring buffer (%d).\n", r);
399                         mutex_unlock(&rdev->cp.mutex);
400                         return r;
401                 }
402                 r = radeon_object_kmap(rdev->cp.ring_obj,
403                                        (void **)&rdev->cp.ring);
404                 if (r) {
405                         DRM_ERROR("radeon: failed to map ring buffer (%d).\n", r);
406                         mutex_unlock(&rdev->cp.mutex);
407                         return r;
408                 }
409         }
410         rdev->cp.ptr_mask = (rdev->cp.ring_size / 4) - 1;
411         rdev->cp.ring_free_dw = rdev->cp.ring_size / 4;
412         return 0;
413 }
414
415 void radeon_ring_fini(struct radeon_device *rdev)
416 {
417         mutex_lock(&rdev->cp.mutex);
418         if (rdev->cp.ring_obj) {
419                 radeon_object_kunmap(rdev->cp.ring_obj);
420                 radeon_object_unpin(rdev->cp.ring_obj);
421                 radeon_object_unref(&rdev->cp.ring_obj);
422                 rdev->cp.ring = NULL;
423                 rdev->cp.ring_obj = NULL;
424         }
425         mutex_unlock(&rdev->cp.mutex);
426 }
427
428
429 /*
430  * Debugfs info
431  */
432 #if defined(CONFIG_DEBUG_FS)
433 static int radeon_debugfs_ib_info(struct seq_file *m, void *data)
434 {
435         struct drm_info_node *node = (struct drm_info_node *) m->private;
436         struct radeon_ib *ib = node->info_ent->data;
437         unsigned i;
438
439         if (ib == NULL) {
440                 return 0;
441         }
442         seq_printf(m, "IB %04lu\n", ib->idx);
443         seq_printf(m, "IB fence %p\n", ib->fence);
444         seq_printf(m, "IB size %05u dwords\n", ib->length_dw);
445         for (i = 0; i < ib->length_dw; i++) {
446                 seq_printf(m, "[%05u]=0x%08X\n", i, ib->ptr[i]);
447         }
448         return 0;
449 }
450
451 static struct drm_info_list radeon_debugfs_ib_list[RADEON_IB_POOL_SIZE];
452 static char radeon_debugfs_ib_names[RADEON_IB_POOL_SIZE][32];
453 #endif
454
455 int radeon_debugfs_ib_init(struct radeon_device *rdev)
456 {
457 #if defined(CONFIG_DEBUG_FS)
458         unsigned i;
459
460         for (i = 0; i < RADEON_IB_POOL_SIZE; i++) {
461                 sprintf(radeon_debugfs_ib_names[i], "radeon_ib_%04u", i);
462                 radeon_debugfs_ib_list[i].name = radeon_debugfs_ib_names[i];
463                 radeon_debugfs_ib_list[i].show = &radeon_debugfs_ib_info;
464                 radeon_debugfs_ib_list[i].driver_features = 0;
465                 radeon_debugfs_ib_list[i].data = &rdev->ib_pool.ibs[i];
466         }
467         return radeon_debugfs_add_files(rdev, radeon_debugfs_ib_list,
468                                         RADEON_IB_POOL_SIZE);
469 #else
470         return 0;
471 #endif
472 }