2 * Copyright 2009 Jerome Glisse.
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sub license, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
16 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
17 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
18 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
19 * USE OR OTHER DEALINGS IN THE SOFTWARE.
21 * The above copyright notice and this permission notice (including the
22 * next paragraph) shall be included in all copies or substantial portions
28 * Jerome Glisse <glisse@freedesktop.org>
31 #include <linux/seq_file.h>
32 #include <asm/atomic.h>
33 #include <linux/wait.h>
34 #include <linux/list.h>
35 #include <linux/kref.h>
36 #include <linux/slab.h>
39 #include "radeon_reg.h"
41 #include "radeon_trace.h"
43 int radeon_fence_emit(struct radeon_device *rdev, struct radeon_fence *fence)
45 unsigned long irq_flags;
47 write_lock_irqsave(&rdev->fence_drv.lock, irq_flags);
49 write_unlock_irqrestore(&rdev->fence_drv.lock, irq_flags);
52 fence->seq = atomic_add_return(1, &rdev->fence_drv.seq);
53 if (!rdev->cp.ready) {
54 /* FIXME: cp is not running assume everythings is done right
57 WREG32(rdev->fence_drv.scratch_reg, fence->seq);
59 radeon_fence_ring_emit(rdev, fence);
61 trace_radeon_fence_emit(rdev->ddev, fence->seq);
63 list_del(&fence->list);
64 list_add_tail(&fence->list, &rdev->fence_drv.emited);
65 write_unlock_irqrestore(&rdev->fence_drv.lock, irq_flags);
69 static bool radeon_fence_poll_locked(struct radeon_device *rdev)
71 struct radeon_fence *fence;
72 struct list_head *i, *n;
75 unsigned long cjiffies;
77 if (rdev->wb.enabled) {
79 if (rdev->wb.use_event)
80 scratch_index = R600_WB_EVENT_OFFSET + rdev->fence_drv.scratch_reg - rdev->scratch.reg_base;
82 scratch_index = RADEON_WB_SCRATCH_OFFSET + rdev->fence_drv.scratch_reg - rdev->scratch.reg_base;
83 seq = rdev->wb.wb[scratch_index/4];
85 seq = RREG32(rdev->fence_drv.scratch_reg);
86 if (seq != rdev->fence_drv.last_seq) {
87 rdev->fence_drv.last_seq = seq;
88 rdev->fence_drv.last_jiffies = jiffies;
89 rdev->fence_drv.last_timeout = RADEON_FENCE_JIFFIES_TIMEOUT;
92 if (time_after(cjiffies, rdev->fence_drv.last_jiffies)) {
93 cjiffies -= rdev->fence_drv.last_jiffies;
94 if (time_after(rdev->fence_drv.last_timeout, cjiffies)) {
95 /* update the timeout */
96 rdev->fence_drv.last_timeout -= cjiffies;
98 /* the 500ms timeout is elapsed we should test
101 rdev->fence_drv.last_timeout = 1;
104 /* wrap around update last jiffies, we will just wait
107 rdev->fence_drv.last_jiffies = cjiffies;
112 list_for_each(i, &rdev->fence_drv.emited) {
113 fence = list_entry(i, struct radeon_fence, list);
114 if (fence->seq == seq) {
119 /* all fence previous to this one are considered as signaled */
125 list_add_tail(i, &rdev->fence_drv.signaled);
126 fence = list_entry(i, struct radeon_fence, list);
127 fence->signaled = true;
129 } while (i != &rdev->fence_drv.emited);
135 static void radeon_fence_destroy(struct kref *kref)
137 unsigned long irq_flags;
138 struct radeon_fence *fence;
140 fence = container_of(kref, struct radeon_fence, kref);
141 write_lock_irqsave(&fence->rdev->fence_drv.lock, irq_flags);
142 list_del(&fence->list);
143 fence->emited = false;
144 write_unlock_irqrestore(&fence->rdev->fence_drv.lock, irq_flags);
148 int radeon_fence_create(struct radeon_device *rdev, struct radeon_fence **fence)
150 unsigned long irq_flags;
152 *fence = kmalloc(sizeof(struct radeon_fence), GFP_KERNEL);
153 if ((*fence) == NULL) {
156 kref_init(&((*fence)->kref));
157 (*fence)->rdev = rdev;
158 (*fence)->emited = false;
159 (*fence)->signaled = false;
161 INIT_LIST_HEAD(&(*fence)->list);
163 write_lock_irqsave(&rdev->fence_drv.lock, irq_flags);
164 list_add_tail(&(*fence)->list, &rdev->fence_drv.created);
165 write_unlock_irqrestore(&rdev->fence_drv.lock, irq_flags);
170 bool radeon_fence_signaled(struct radeon_fence *fence)
172 unsigned long irq_flags;
173 bool signaled = false;
178 if (fence->rdev->gpu_lockup)
181 write_lock_irqsave(&fence->rdev->fence_drv.lock, irq_flags);
182 signaled = fence->signaled;
183 /* if we are shuting down report all fence as signaled */
184 if (fence->rdev->shutdown) {
187 if (!fence->emited) {
188 WARN(1, "Querying an unemited fence : %p !\n", fence);
192 radeon_fence_poll_locked(fence->rdev);
193 signaled = fence->signaled;
195 write_unlock_irqrestore(&fence->rdev->fence_drv.lock, irq_flags);
199 int radeon_fence_wait(struct radeon_fence *fence, bool intr)
201 struct radeon_device *rdev;
202 unsigned long irq_flags, timeout;
207 WARN(1, "Querying an invalid fence : %p !\n", fence);
211 if (radeon_fence_signaled(fence)) {
214 timeout = rdev->fence_drv.last_timeout;
216 /* save current sequence used to check for GPU lockup */
217 seq = rdev->fence_drv.last_seq;
218 trace_radeon_fence_wait_begin(rdev->ddev, seq);
220 radeon_irq_kms_sw_irq_get(rdev);
221 r = wait_event_interruptible_timeout(rdev->fence_drv.queue,
222 radeon_fence_signaled(fence), timeout);
223 radeon_irq_kms_sw_irq_put(rdev);
224 if (unlikely(r < 0)) {
228 radeon_irq_kms_sw_irq_get(rdev);
229 r = wait_event_timeout(rdev->fence_drv.queue,
230 radeon_fence_signaled(fence), timeout);
231 radeon_irq_kms_sw_irq_put(rdev);
233 trace_radeon_fence_wait_end(rdev->ddev, seq);
234 if (unlikely(!radeon_fence_signaled(fence))) {
235 /* we were interrupted for some reason and fence isn't
236 * isn't signaled yet, resume wait
242 /* don't protect read access to rdev->fence_drv.last_seq
243 * if we experiencing a lockup the value doesn't change
245 if (seq == rdev->fence_drv.last_seq && radeon_gpu_is_lockup(rdev)) {
246 /* good news we believe it's a lockup */
247 WARN(1, "GPU lockup (waiting for 0x%08X last fence id 0x%08X)\n",
249 /* FIXME: what should we do ? marking everyone
250 * as signaled for now
252 rdev->gpu_lockup = true;
253 r = radeon_gpu_reset(rdev);
256 WREG32(rdev->fence_drv.scratch_reg, fence->seq);
257 rdev->gpu_lockup = false;
259 timeout = RADEON_FENCE_JIFFIES_TIMEOUT;
260 write_lock_irqsave(&rdev->fence_drv.lock, irq_flags);
261 rdev->fence_drv.last_timeout = RADEON_FENCE_JIFFIES_TIMEOUT;
262 rdev->fence_drv.last_jiffies = jiffies;
263 write_unlock_irqrestore(&rdev->fence_drv.lock, irq_flags);
269 int radeon_fence_wait_next(struct radeon_device *rdev)
271 unsigned long irq_flags;
272 struct radeon_fence *fence;
275 if (rdev->gpu_lockup) {
278 write_lock_irqsave(&rdev->fence_drv.lock, irq_flags);
279 if (list_empty(&rdev->fence_drv.emited)) {
280 write_unlock_irqrestore(&rdev->fence_drv.lock, irq_flags);
283 fence = list_entry(rdev->fence_drv.emited.next,
284 struct radeon_fence, list);
285 radeon_fence_ref(fence);
286 write_unlock_irqrestore(&rdev->fence_drv.lock, irq_flags);
287 r = radeon_fence_wait(fence, false);
288 radeon_fence_unref(&fence);
292 int radeon_fence_wait_last(struct radeon_device *rdev)
294 unsigned long irq_flags;
295 struct radeon_fence *fence;
298 if (rdev->gpu_lockup) {
301 write_lock_irqsave(&rdev->fence_drv.lock, irq_flags);
302 if (list_empty(&rdev->fence_drv.emited)) {
303 write_unlock_irqrestore(&rdev->fence_drv.lock, irq_flags);
306 fence = list_entry(rdev->fence_drv.emited.prev,
307 struct radeon_fence, list);
308 radeon_fence_ref(fence);
309 write_unlock_irqrestore(&rdev->fence_drv.lock, irq_flags);
310 r = radeon_fence_wait(fence, false);
311 radeon_fence_unref(&fence);
315 struct radeon_fence *radeon_fence_ref(struct radeon_fence *fence)
317 kref_get(&fence->kref);
321 void radeon_fence_unref(struct radeon_fence **fence)
323 struct radeon_fence *tmp = *fence;
327 kref_put(&tmp->kref, &radeon_fence_destroy);
331 void radeon_fence_process(struct radeon_device *rdev)
333 unsigned long irq_flags;
336 write_lock_irqsave(&rdev->fence_drv.lock, irq_flags);
337 wake = radeon_fence_poll_locked(rdev);
338 write_unlock_irqrestore(&rdev->fence_drv.lock, irq_flags);
340 wake_up_all(&rdev->fence_drv.queue);
344 int radeon_fence_driver_init(struct radeon_device *rdev)
346 unsigned long irq_flags;
349 write_lock_irqsave(&rdev->fence_drv.lock, irq_flags);
350 r = radeon_scratch_get(rdev, &rdev->fence_drv.scratch_reg);
352 dev_err(rdev->dev, "fence failed to get scratch register\n");
353 write_unlock_irqrestore(&rdev->fence_drv.lock, irq_flags);
356 WREG32(rdev->fence_drv.scratch_reg, 0);
357 atomic_set(&rdev->fence_drv.seq, 0);
358 INIT_LIST_HEAD(&rdev->fence_drv.created);
359 INIT_LIST_HEAD(&rdev->fence_drv.emited);
360 INIT_LIST_HEAD(&rdev->fence_drv.signaled);
361 init_waitqueue_head(&rdev->fence_drv.queue);
362 rdev->fence_drv.initialized = true;
363 write_unlock_irqrestore(&rdev->fence_drv.lock, irq_flags);
364 if (radeon_debugfs_fence_init(rdev)) {
365 dev_err(rdev->dev, "fence debugfs file creation failed\n");
370 void radeon_fence_driver_fini(struct radeon_device *rdev)
372 unsigned long irq_flags;
374 if (!rdev->fence_drv.initialized)
376 wake_up_all(&rdev->fence_drv.queue);
377 write_lock_irqsave(&rdev->fence_drv.lock, irq_flags);
378 radeon_scratch_free(rdev, rdev->fence_drv.scratch_reg);
379 write_unlock_irqrestore(&rdev->fence_drv.lock, irq_flags);
380 rdev->fence_drv.initialized = false;
387 #if defined(CONFIG_DEBUG_FS)
388 static int radeon_debugfs_fence_info(struct seq_file *m, void *data)
390 struct drm_info_node *node = (struct drm_info_node *)m->private;
391 struct drm_device *dev = node->minor->dev;
392 struct radeon_device *rdev = dev->dev_private;
393 struct radeon_fence *fence;
395 seq_printf(m, "Last signaled fence 0x%08X\n",
396 RREG32(rdev->fence_drv.scratch_reg));
397 if (!list_empty(&rdev->fence_drv.emited)) {
398 fence = list_entry(rdev->fence_drv.emited.prev,
399 struct radeon_fence, list);
400 seq_printf(m, "Last emited fence %p with 0x%08X\n",
406 static struct drm_info_list radeon_debugfs_fence_list[] = {
407 {"radeon_fence_info", &radeon_debugfs_fence_info, 0, NULL},
411 int radeon_debugfs_fence_init(struct radeon_device *rdev)
413 #if defined(CONFIG_DEBUG_FS)
414 return radeon_debugfs_add_files(rdev, radeon_debugfs_fence_list, 1);