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[zen-stable.git] / drivers / gpu / drm / radeon / radeon_ring.c
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1 /*
2 * Copyright 2008 Advanced Micro Devices, Inc.
3 * Copyright 2008 Red Hat Inc.
4 * Copyright 2009 Jerome Glisse.
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:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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.
24 * Authors: Dave Airlie
25 * Alex Deucher
26 * Jerome Glisse
28 #include <linux/seq_file.h>
29 #include <linux/slab.h>
30 #include "drmP.h"
31 #include "radeon_drm.h"
32 #include "radeon_reg.h"
33 #include "radeon.h"
34 #include "atom.h"
36 int radeon_debugfs_ib_init(struct radeon_device *rdev);
37 int radeon_debugfs_ring_init(struct radeon_device *rdev);
39 u32 radeon_get_ib_value(struct radeon_cs_parser *p, int idx)
41 struct radeon_cs_chunk *ibc = &p->chunks[p->chunk_ib_idx];
42 u32 pg_idx, pg_offset;
43 u32 idx_value = 0;
44 int new_page;
46 pg_idx = (idx * 4) / PAGE_SIZE;
47 pg_offset = (idx * 4) % PAGE_SIZE;
49 if (ibc->kpage_idx[0] == pg_idx)
50 return ibc->kpage[0][pg_offset/4];
51 if (ibc->kpage_idx[1] == pg_idx)
52 return ibc->kpage[1][pg_offset/4];
54 new_page = radeon_cs_update_pages(p, pg_idx);
55 if (new_page < 0) {
56 p->parser_error = new_page;
57 return 0;
60 idx_value = ibc->kpage[new_page][pg_offset/4];
61 return idx_value;
64 void radeon_ring_write(struct radeon_ring *ring, uint32_t v)
66 #if DRM_DEBUG_CODE
67 if (ring->count_dw <= 0) {
68 DRM_ERROR("radeon: writting more dword to ring than expected !\n");
70 #endif
71 ring->ring[ring->wptr++] = v;
72 ring->wptr &= ring->ptr_mask;
73 ring->count_dw--;
74 ring->ring_free_dw--;
78 * IB.
80 bool radeon_ib_try_free(struct radeon_device *rdev, struct radeon_ib *ib)
82 bool done = false;
84 /* only free ib which have been emited */
85 if (ib->fence && ib->fence->emitted) {
86 if (radeon_fence_signaled(ib->fence)) {
87 radeon_fence_unref(&ib->fence);
88 radeon_sa_bo_free(rdev, &ib->sa_bo);
89 done = true;
92 return done;
95 int radeon_ib_get(struct radeon_device *rdev, int ring,
96 struct radeon_ib **ib, unsigned size)
98 struct radeon_fence *fence;
99 unsigned cretry = 0;
100 int r = 0, i, idx;
102 *ib = NULL;
103 /* align size on 256 bytes */
104 size = ALIGN(size, 256);
106 r = radeon_fence_create(rdev, &fence, ring);
107 if (r) {
108 dev_err(rdev->dev, "failed to create fence for new IB\n");
109 return r;
112 radeon_mutex_lock(&rdev->ib_pool.mutex);
113 idx = rdev->ib_pool.head_id;
114 retry:
115 if (cretry > 5) {
116 dev_err(rdev->dev, "failed to get an ib after 5 retry\n");
117 radeon_mutex_unlock(&rdev->ib_pool.mutex);
118 radeon_fence_unref(&fence);
119 return -ENOMEM;
121 cretry++;
122 for (i = 0; i < RADEON_IB_POOL_SIZE; i++) {
123 radeon_ib_try_free(rdev, &rdev->ib_pool.ibs[idx]);
124 if (rdev->ib_pool.ibs[idx].fence == NULL) {
125 r = radeon_sa_bo_new(rdev, &rdev->ib_pool.sa_manager,
126 &rdev->ib_pool.ibs[idx].sa_bo,
127 size, 256);
128 if (!r) {
129 *ib = &rdev->ib_pool.ibs[idx];
130 (*ib)->ptr = rdev->ib_pool.sa_manager.cpu_ptr;
131 (*ib)->ptr += ((*ib)->sa_bo.offset >> 2);
132 (*ib)->gpu_addr = rdev->ib_pool.sa_manager.gpu_addr;
133 (*ib)->gpu_addr += (*ib)->sa_bo.offset;
134 (*ib)->fence = fence;
135 (*ib)->vm_id = 0;
136 /* ib are most likely to be allocated in a ring fashion
137 * thus rdev->ib_pool.head_id should be the id of the
138 * oldest ib
140 rdev->ib_pool.head_id = (1 + idx);
141 rdev->ib_pool.head_id &= (RADEON_IB_POOL_SIZE - 1);
142 radeon_mutex_unlock(&rdev->ib_pool.mutex);
143 return 0;
146 idx = (idx + 1) & (RADEON_IB_POOL_SIZE - 1);
148 /* this should be rare event, ie all ib scheduled none signaled yet.
150 for (i = 0; i < RADEON_IB_POOL_SIZE; i++) {
151 if (rdev->ib_pool.ibs[idx].fence && rdev->ib_pool.ibs[idx].fence->emitted) {
152 r = radeon_fence_wait(rdev->ib_pool.ibs[idx].fence, false);
153 if (!r) {
154 goto retry;
156 /* an error happened */
157 break;
159 idx = (idx + 1) & (RADEON_IB_POOL_SIZE - 1);
161 radeon_mutex_unlock(&rdev->ib_pool.mutex);
162 radeon_fence_unref(&fence);
163 return r;
166 void radeon_ib_free(struct radeon_device *rdev, struct radeon_ib **ib)
168 struct radeon_ib *tmp = *ib;
170 *ib = NULL;
171 if (tmp == NULL) {
172 return;
174 radeon_mutex_lock(&rdev->ib_pool.mutex);
175 if (tmp->fence && !tmp->fence->emitted) {
176 radeon_sa_bo_free(rdev, &tmp->sa_bo);
177 radeon_fence_unref(&tmp->fence);
179 radeon_mutex_unlock(&rdev->ib_pool.mutex);
182 int radeon_ib_schedule(struct radeon_device *rdev, struct radeon_ib *ib)
184 struct radeon_ring *ring = &rdev->ring[ib->fence->ring];
185 int r = 0;
187 if (!ib->length_dw || !ring->ready) {
188 /* TODO: Nothings in the ib we should report. */
189 DRM_ERROR("radeon: couldn't schedule IB(%u).\n", ib->idx);
190 return -EINVAL;
193 /* 64 dwords should be enough for fence too */
194 r = radeon_ring_lock(rdev, ring, 64);
195 if (r) {
196 DRM_ERROR("radeon: scheduling IB failed (%d).\n", r);
197 return r;
199 radeon_ring_ib_execute(rdev, ib->fence->ring, ib);
200 radeon_fence_emit(rdev, ib->fence);
201 radeon_ring_unlock_commit(rdev, ring);
202 return 0;
205 int radeon_ib_pool_init(struct radeon_device *rdev)
207 struct radeon_sa_manager tmp;
208 int i, r;
210 r = radeon_sa_bo_manager_init(rdev, &tmp,
211 RADEON_IB_POOL_SIZE*64*1024,
212 RADEON_GEM_DOMAIN_GTT);
213 if (r) {
214 return r;
217 radeon_mutex_lock(&rdev->ib_pool.mutex);
218 if (rdev->ib_pool.ready) {
219 radeon_mutex_unlock(&rdev->ib_pool.mutex);
220 radeon_sa_bo_manager_fini(rdev, &tmp);
221 return 0;
224 rdev->ib_pool.sa_manager = tmp;
225 INIT_LIST_HEAD(&rdev->ib_pool.sa_manager.sa_bo);
226 for (i = 0; i < RADEON_IB_POOL_SIZE; i++) {
227 rdev->ib_pool.ibs[i].fence = NULL;
228 rdev->ib_pool.ibs[i].idx = i;
229 rdev->ib_pool.ibs[i].length_dw = 0;
230 INIT_LIST_HEAD(&rdev->ib_pool.ibs[i].sa_bo.list);
232 rdev->ib_pool.head_id = 0;
233 rdev->ib_pool.ready = true;
234 DRM_INFO("radeon: ib pool ready.\n");
236 if (radeon_debugfs_ib_init(rdev)) {
237 DRM_ERROR("Failed to register debugfs file for IB !\n");
239 if (radeon_debugfs_ring_init(rdev)) {
240 DRM_ERROR("Failed to register debugfs file for rings !\n");
242 radeon_mutex_unlock(&rdev->ib_pool.mutex);
243 return 0;
246 void radeon_ib_pool_fini(struct radeon_device *rdev)
248 unsigned i;
250 radeon_mutex_lock(&rdev->ib_pool.mutex);
251 if (rdev->ib_pool.ready) {
252 for (i = 0; i < RADEON_IB_POOL_SIZE; i++) {
253 radeon_sa_bo_free(rdev, &rdev->ib_pool.ibs[i].sa_bo);
254 radeon_fence_unref(&rdev->ib_pool.ibs[i].fence);
256 radeon_sa_bo_manager_fini(rdev, &rdev->ib_pool.sa_manager);
257 rdev->ib_pool.ready = false;
259 radeon_mutex_unlock(&rdev->ib_pool.mutex);
262 int radeon_ib_pool_start(struct radeon_device *rdev)
264 return radeon_sa_bo_manager_start(rdev, &rdev->ib_pool.sa_manager);
267 int radeon_ib_pool_suspend(struct radeon_device *rdev)
269 return radeon_sa_bo_manager_suspend(rdev, &rdev->ib_pool.sa_manager);
273 * Ring.
275 int radeon_ring_index(struct radeon_device *rdev, struct radeon_ring *ring)
277 /* r1xx-r5xx only has CP ring */
278 if (rdev->family < CHIP_R600)
279 return RADEON_RING_TYPE_GFX_INDEX;
281 if (rdev->family >= CHIP_CAYMAN) {
282 if (ring == &rdev->ring[CAYMAN_RING_TYPE_CP1_INDEX])
283 return CAYMAN_RING_TYPE_CP1_INDEX;
284 else if (ring == &rdev->ring[CAYMAN_RING_TYPE_CP2_INDEX])
285 return CAYMAN_RING_TYPE_CP2_INDEX;
287 return RADEON_RING_TYPE_GFX_INDEX;
290 void radeon_ring_free_size(struct radeon_device *rdev, struct radeon_ring *ring)
292 u32 rptr;
294 if (rdev->wb.enabled)
295 rptr = le32_to_cpu(rdev->wb.wb[ring->rptr_offs/4]);
296 else
297 rptr = RREG32(ring->rptr_reg);
298 ring->rptr = (rptr & ring->ptr_reg_mask) >> ring->ptr_reg_shift;
299 /* This works because ring_size is a power of 2 */
300 ring->ring_free_dw = (ring->rptr + (ring->ring_size / 4));
301 ring->ring_free_dw -= ring->wptr;
302 ring->ring_free_dw &= ring->ptr_mask;
303 if (!ring->ring_free_dw) {
304 ring->ring_free_dw = ring->ring_size / 4;
309 int radeon_ring_alloc(struct radeon_device *rdev, struct radeon_ring *ring, unsigned ndw)
311 int r;
313 /* Align requested size with padding so unlock_commit can
314 * pad safely */
315 ndw = (ndw + ring->align_mask) & ~ring->align_mask;
316 while (ndw > (ring->ring_free_dw - 1)) {
317 radeon_ring_free_size(rdev, ring);
318 if (ndw < ring->ring_free_dw) {
319 break;
321 r = radeon_fence_wait_next(rdev, radeon_ring_index(rdev, ring));
322 if (r)
323 return r;
325 ring->count_dw = ndw;
326 ring->wptr_old = ring->wptr;
327 return 0;
330 int radeon_ring_lock(struct radeon_device *rdev, struct radeon_ring *ring, unsigned ndw)
332 int r;
334 mutex_lock(&ring->mutex);
335 r = radeon_ring_alloc(rdev, ring, ndw);
336 if (r) {
337 mutex_unlock(&ring->mutex);
338 return r;
340 return 0;
343 void radeon_ring_commit(struct radeon_device *rdev, struct radeon_ring *ring)
345 unsigned count_dw_pad;
346 unsigned i;
348 /* We pad to match fetch size */
349 count_dw_pad = (ring->align_mask + 1) -
350 (ring->wptr & ring->align_mask);
351 for (i = 0; i < count_dw_pad; i++) {
352 radeon_ring_write(ring, ring->nop);
354 DRM_MEMORYBARRIER();
355 WREG32(ring->wptr_reg, (ring->wptr << ring->ptr_reg_shift) & ring->ptr_reg_mask);
356 (void)RREG32(ring->wptr_reg);
359 void radeon_ring_unlock_commit(struct radeon_device *rdev, struct radeon_ring *ring)
361 radeon_ring_commit(rdev, ring);
362 mutex_unlock(&ring->mutex);
365 void radeon_ring_unlock_undo(struct radeon_device *rdev, struct radeon_ring *ring)
367 ring->wptr = ring->wptr_old;
368 mutex_unlock(&ring->mutex);
371 int radeon_ring_init(struct radeon_device *rdev, struct radeon_ring *ring, unsigned ring_size,
372 unsigned rptr_offs, unsigned rptr_reg, unsigned wptr_reg,
373 u32 ptr_reg_shift, u32 ptr_reg_mask, u32 nop)
375 int r;
377 ring->ring_size = ring_size;
378 ring->rptr_offs = rptr_offs;
379 ring->rptr_reg = rptr_reg;
380 ring->wptr_reg = wptr_reg;
381 ring->ptr_reg_shift = ptr_reg_shift;
382 ring->ptr_reg_mask = ptr_reg_mask;
383 ring->nop = nop;
384 /* Allocate ring buffer */
385 if (ring->ring_obj == NULL) {
386 r = radeon_bo_create(rdev, ring->ring_size, PAGE_SIZE, true,
387 RADEON_GEM_DOMAIN_GTT,
388 &ring->ring_obj);
389 if (r) {
390 dev_err(rdev->dev, "(%d) ring create failed\n", r);
391 return r;
393 r = radeon_bo_reserve(ring->ring_obj, false);
394 if (unlikely(r != 0))
395 return r;
396 r = radeon_bo_pin(ring->ring_obj, RADEON_GEM_DOMAIN_GTT,
397 &ring->gpu_addr);
398 if (r) {
399 radeon_bo_unreserve(ring->ring_obj);
400 dev_err(rdev->dev, "(%d) ring pin failed\n", r);
401 return r;
403 r = radeon_bo_kmap(ring->ring_obj,
404 (void **)&ring->ring);
405 radeon_bo_unreserve(ring->ring_obj);
406 if (r) {
407 dev_err(rdev->dev, "(%d) ring map failed\n", r);
408 return r;
411 ring->ptr_mask = (ring->ring_size / 4) - 1;
412 ring->ring_free_dw = ring->ring_size / 4;
413 return 0;
416 void radeon_ring_fini(struct radeon_device *rdev, struct radeon_ring *ring)
418 int r;
419 struct radeon_bo *ring_obj;
421 mutex_lock(&ring->mutex);
422 ring_obj = ring->ring_obj;
423 ring->ring = NULL;
424 ring->ring_obj = NULL;
425 mutex_unlock(&ring->mutex);
427 if (ring_obj) {
428 r = radeon_bo_reserve(ring_obj, false);
429 if (likely(r == 0)) {
430 radeon_bo_kunmap(ring_obj);
431 radeon_bo_unpin(ring_obj);
432 radeon_bo_unreserve(ring_obj);
434 radeon_bo_unref(&ring_obj);
439 * Debugfs info
441 #if defined(CONFIG_DEBUG_FS)
443 static int radeon_debugfs_ring_info(struct seq_file *m, void *data)
445 struct drm_info_node *node = (struct drm_info_node *) m->private;
446 struct drm_device *dev = node->minor->dev;
447 struct radeon_device *rdev = dev->dev_private;
448 int ridx = *(int*)node->info_ent->data;
449 struct radeon_ring *ring = &rdev->ring[ridx];
450 unsigned count, i, j;
452 radeon_ring_free_size(rdev, ring);
453 count = (ring->ring_size / 4) - ring->ring_free_dw;
454 seq_printf(m, "wptr(0x%04x): 0x%08x\n", ring->wptr_reg, RREG32(ring->wptr_reg));
455 seq_printf(m, "rptr(0x%04x): 0x%08x\n", ring->rptr_reg, RREG32(ring->rptr_reg));
456 seq_printf(m, "driver's copy of the wptr: 0x%08x\n", ring->wptr);
457 seq_printf(m, "driver's copy of the rptr: 0x%08x\n", ring->rptr);
458 seq_printf(m, "%u free dwords in ring\n", ring->ring_free_dw);
459 seq_printf(m, "%u dwords in ring\n", count);
460 i = ring->rptr;
461 for (j = 0; j <= count; j++) {
462 seq_printf(m, "r[%04d]=0x%08x\n", i, ring->ring[i]);
463 i = (i + 1) & ring->ptr_mask;
465 return 0;
468 static int radeon_ring_type_gfx_index = RADEON_RING_TYPE_GFX_INDEX;
469 static int cayman_ring_type_cp1_index = CAYMAN_RING_TYPE_CP1_INDEX;
470 static int cayman_ring_type_cp2_index = CAYMAN_RING_TYPE_CP2_INDEX;
472 static struct drm_info_list radeon_debugfs_ring_info_list[] = {
473 {"radeon_ring_gfx", radeon_debugfs_ring_info, 0, &radeon_ring_type_gfx_index},
474 {"radeon_ring_cp1", radeon_debugfs_ring_info, 0, &cayman_ring_type_cp1_index},
475 {"radeon_ring_cp2", radeon_debugfs_ring_info, 0, &cayman_ring_type_cp2_index},
478 static int radeon_debugfs_ib_info(struct seq_file *m, void *data)
480 struct drm_info_node *node = (struct drm_info_node *) m->private;
481 struct radeon_ib *ib = node->info_ent->data;
482 unsigned i;
484 if (ib == NULL) {
485 return 0;
487 seq_printf(m, "IB %04u\n", ib->idx);
488 seq_printf(m, "IB fence %p\n", ib->fence);
489 seq_printf(m, "IB size %05u dwords\n", ib->length_dw);
490 for (i = 0; i < ib->length_dw; i++) {
491 seq_printf(m, "[%05u]=0x%08X\n", i, ib->ptr[i]);
493 return 0;
496 static struct drm_info_list radeon_debugfs_ib_list[RADEON_IB_POOL_SIZE];
497 static char radeon_debugfs_ib_names[RADEON_IB_POOL_SIZE][32];
498 #endif
500 int radeon_debugfs_ring_init(struct radeon_device *rdev)
502 #if defined(CONFIG_DEBUG_FS)
503 if (rdev->family >= CHIP_CAYMAN)
504 return radeon_debugfs_add_files(rdev, radeon_debugfs_ring_info_list,
505 ARRAY_SIZE(radeon_debugfs_ring_info_list));
506 else
507 return radeon_debugfs_add_files(rdev, radeon_debugfs_ring_info_list, 1);
508 #else
509 return 0;
510 #endif
513 int radeon_debugfs_ib_init(struct radeon_device *rdev)
515 #if defined(CONFIG_DEBUG_FS)
516 unsigned i;
518 for (i = 0; i < RADEON_IB_POOL_SIZE; i++) {
519 sprintf(radeon_debugfs_ib_names[i], "radeon_ib_%04u", i);
520 radeon_debugfs_ib_list[i].name = radeon_debugfs_ib_names[i];
521 radeon_debugfs_ib_list[i].show = &radeon_debugfs_ib_info;
522 radeon_debugfs_ib_list[i].driver_features = 0;
523 radeon_debugfs_ib_list[i].data = &rdev->ib_pool.ibs[i];
525 return radeon_debugfs_add_files(rdev, radeon_debugfs_ib_list,
526 RADEON_IB_POOL_SIZE);
527 #else
528 return 0;
529 #endif