radeon_irq_kms.c revision 1.1.1.2 1 /* $NetBSD: radeon_irq_kms.c,v 1.1.1.2 2018/08/27 01:34:58 riastradh Exp $ */
2
3 /*
4 * Copyright 2008 Advanced Micro Devices, Inc.
5 * Copyright 2008 Red Hat Inc.
6 * Copyright 2009 Jerome Glisse.
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
22 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
23 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
24 * OTHER DEALINGS IN THE SOFTWARE.
25 *
26 * Authors: Dave Airlie
27 * Alex Deucher
28 * Jerome Glisse
29 */
30 #include <sys/cdefs.h>
31 __KERNEL_RCSID(0, "$NetBSD: radeon_irq_kms.c,v 1.1.1.2 2018/08/27 01:34:58 riastradh Exp $");
32
33 #include <drm/drmP.h>
34 #include <drm/drm_crtc_helper.h>
35 #include <drm/radeon_drm.h>
36 #include "radeon_reg.h"
37 #include "radeon.h"
38 #include "atom.h"
39
40 #include <linux/pm_runtime.h>
41
42 #define RADEON_WAIT_IDLE_TIMEOUT 200
43
44 /**
45 * radeon_driver_irq_handler_kms - irq handler for KMS
46 *
47 * @int irq, void *arg: args
48 *
49 * This is the irq handler for the radeon KMS driver (all asics).
50 * radeon_irq_process is a macro that points to the per-asic
51 * irq handler callback.
52 */
53 irqreturn_t radeon_driver_irq_handler_kms(int irq, void *arg)
54 {
55 struct drm_device *dev = (struct drm_device *) arg;
56 struct radeon_device *rdev = dev->dev_private;
57 irqreturn_t ret;
58
59 ret = radeon_irq_process(rdev);
60 if (ret == IRQ_HANDLED)
61 pm_runtime_mark_last_busy(dev->dev);
62 return ret;
63 }
64
65 /*
66 * Handle hotplug events outside the interrupt handler proper.
67 */
68 /**
69 * radeon_hotplug_work_func - display hotplug work handler
70 *
71 * @work: work struct
72 *
73 * This is the hot plug event work handler (all asics).
74 * The work gets scheduled from the irq handler if there
75 * was a hot plug interrupt. It walks the connector table
76 * and calls the hotplug handler for each one, then sends
77 * a drm hotplug event to alert userspace.
78 */
79 static void radeon_hotplug_work_func(struct work_struct *work)
80 {
81 struct radeon_device *rdev = container_of(work, struct radeon_device,
82 hotplug_work.work);
83 struct drm_device *dev = rdev->ddev;
84 struct drm_mode_config *mode_config = &dev->mode_config;
85 struct drm_connector *connector;
86
87 /* we can race here at startup, some boards seem to trigger
88 * hotplug irqs when they shouldn't. */
89 if (!rdev->mode_info.mode_config_initialized)
90 return;
91
92 mutex_lock(&mode_config->mutex);
93 if (mode_config->num_connector) {
94 list_for_each_entry(connector, &mode_config->connector_list, head)
95 radeon_connector_hotplug(connector);
96 }
97 mutex_unlock(&mode_config->mutex);
98 /* Just fire off a uevent and let userspace tell us what to do */
99 drm_helper_hpd_irq_event(dev);
100 }
101
102 static void radeon_dp_work_func(struct work_struct *work)
103 {
104 struct radeon_device *rdev = container_of(work, struct radeon_device,
105 dp_work);
106 struct drm_device *dev = rdev->ddev;
107 struct drm_mode_config *mode_config = &dev->mode_config;
108 struct drm_connector *connector;
109
110 /* this should take a mutex */
111 if (mode_config->num_connector) {
112 list_for_each_entry(connector, &mode_config->connector_list, head)
113 radeon_connector_hotplug(connector);
114 }
115 }
116 /**
117 * radeon_driver_irq_preinstall_kms - drm irq preinstall callback
118 *
119 * @dev: drm dev pointer
120 *
121 * Gets the hw ready to enable irqs (all asics).
122 * This function disables all interrupt sources on the GPU.
123 */
124 void radeon_driver_irq_preinstall_kms(struct drm_device *dev)
125 {
126 struct radeon_device *rdev = dev->dev_private;
127 unsigned long irqflags;
128 unsigned i;
129
130 spin_lock_irqsave(&rdev->irq.lock, irqflags);
131 /* Disable *all* interrupts */
132 for (i = 0; i < RADEON_NUM_RINGS; i++)
133 atomic_set(&rdev->irq.ring_int[i], 0);
134 rdev->irq.dpm_thermal = false;
135 for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
136 rdev->irq.hpd[i] = false;
137 for (i = 0; i < RADEON_MAX_CRTCS; i++) {
138 rdev->irq.crtc_vblank_int[i] = false;
139 atomic_set(&rdev->irq.pflip[i], 0);
140 rdev->irq.afmt[i] = false;
141 }
142 radeon_irq_set(rdev);
143 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
144 /* Clear bits */
145 radeon_irq_process(rdev);
146 }
147
148 /**
149 * radeon_driver_irq_postinstall_kms - drm irq preinstall callback
150 *
151 * @dev: drm dev pointer
152 *
153 * Handles stuff to be done after enabling irqs (all asics).
154 * Returns 0 on success.
155 */
156 int radeon_driver_irq_postinstall_kms(struct drm_device *dev)
157 {
158 struct radeon_device *rdev = dev->dev_private;
159
160 if (ASIC_IS_AVIVO(rdev))
161 dev->max_vblank_count = 0x00ffffff;
162 else
163 dev->max_vblank_count = 0x001fffff;
164
165 return 0;
166 }
167
168 /**
169 * radeon_driver_irq_uninstall_kms - drm irq uninstall callback
170 *
171 * @dev: drm dev pointer
172 *
173 * This function disables all interrupt sources on the GPU (all asics).
174 */
175 void radeon_driver_irq_uninstall_kms(struct drm_device *dev)
176 {
177 struct radeon_device *rdev = dev->dev_private;
178 unsigned long irqflags;
179 unsigned i;
180
181 if (rdev == NULL) {
182 return;
183 }
184 spin_lock_irqsave(&rdev->irq.lock, irqflags);
185 /* Disable *all* interrupts */
186 for (i = 0; i < RADEON_NUM_RINGS; i++)
187 atomic_set(&rdev->irq.ring_int[i], 0);
188 rdev->irq.dpm_thermal = false;
189 for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
190 rdev->irq.hpd[i] = false;
191 for (i = 0; i < RADEON_MAX_CRTCS; i++) {
192 rdev->irq.crtc_vblank_int[i] = false;
193 atomic_set(&rdev->irq.pflip[i], 0);
194 rdev->irq.afmt[i] = false;
195 }
196 radeon_irq_set(rdev);
197 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
198 }
199
200 /**
201 * radeon_msi_ok - asic specific msi checks
202 *
203 * @rdev: radeon device pointer
204 *
205 * Handles asic specific MSI checks to determine if
206 * MSIs should be enabled on a particular chip (all asics).
207 * Returns true if MSIs should be enabled, false if MSIs
208 * should not be enabled.
209 */
210 static bool radeon_msi_ok(struct radeon_device *rdev)
211 {
212 /* RV370/RV380 was first asic with MSI support */
213 if (rdev->family < CHIP_RV380)
214 return false;
215
216 /* MSIs don't work on AGP */
217 if (rdev->flags & RADEON_IS_AGP)
218 return false;
219
220 /*
221 * Older chips have a HW limitation, they can only generate 40 bits
222 * of address for "64-bit" MSIs which breaks on some platforms, notably
223 * IBM POWER servers, so we limit them
224 */
225 if (rdev->family < CHIP_BONAIRE) {
226 dev_info(rdev->dev, "radeon: MSI limited to 32-bit\n");
227 rdev->pdev->no_64bit_msi = 1;
228 }
229
230 /* force MSI on */
231 if (radeon_msi == 1)
232 return true;
233 else if (radeon_msi == 0)
234 return false;
235
236 /* Quirks */
237 /* HP RS690 only seems to work with MSIs. */
238 if ((rdev->pdev->device == 0x791f) &&
239 (rdev->pdev->subsystem_vendor == 0x103c) &&
240 (rdev->pdev->subsystem_device == 0x30c2))
241 return true;
242
243 /* Dell RS690 only seems to work with MSIs. */
244 if ((rdev->pdev->device == 0x791f) &&
245 (rdev->pdev->subsystem_vendor == 0x1028) &&
246 (rdev->pdev->subsystem_device == 0x01fc))
247 return true;
248
249 /* Dell RS690 only seems to work with MSIs. */
250 if ((rdev->pdev->device == 0x791f) &&
251 (rdev->pdev->subsystem_vendor == 0x1028) &&
252 (rdev->pdev->subsystem_device == 0x01fd))
253 return true;
254
255 /* Gateway RS690 only seems to work with MSIs. */
256 if ((rdev->pdev->device == 0x791f) &&
257 (rdev->pdev->subsystem_vendor == 0x107b) &&
258 (rdev->pdev->subsystem_device == 0x0185))
259 return true;
260
261 /* try and enable MSIs by default on all RS690s */
262 if (rdev->family == CHIP_RS690)
263 return true;
264
265 /* RV515 seems to have MSI issues where it loses
266 * MSI rearms occasionally. This leads to lockups and freezes.
267 * disable it by default.
268 */
269 if (rdev->family == CHIP_RV515)
270 return false;
271 if (rdev->flags & RADEON_IS_IGP) {
272 /* APUs work fine with MSIs */
273 if (rdev->family >= CHIP_PALM)
274 return true;
275 /* lots of IGPs have problems with MSIs */
276 return false;
277 }
278
279 return true;
280 }
281
282 /**
283 * radeon_irq_kms_init - init driver interrupt info
284 *
285 * @rdev: radeon device pointer
286 *
287 * Sets up the work irq handlers, vblank init, MSIs, etc. (all asics).
288 * Returns 0 for success, error for failure.
289 */
290 int radeon_irq_kms_init(struct radeon_device *rdev)
291 {
292 int r = 0;
293
294 spin_lock_init(&rdev->irq.lock);
295 r = drm_vblank_init(rdev->ddev, rdev->num_crtc);
296 if (r) {
297 return r;
298 }
299 /* enable msi */
300 rdev->msi_enabled = 0;
301
302 if (radeon_msi_ok(rdev)) {
303 int ret = pci_enable_msi(rdev->pdev);
304 if (!ret) {
305 rdev->msi_enabled = 1;
306 dev_info(rdev->dev, "radeon: using MSI.\n");
307 }
308 }
309
310 INIT_DELAYED_WORK(&rdev->hotplug_work, radeon_hotplug_work_func);
311 INIT_WORK(&rdev->dp_work, radeon_dp_work_func);
312 INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi);
313
314 rdev->irq.installed = true;
315 r = drm_irq_install(rdev->ddev, rdev->ddev->pdev->irq);
316 if (r) {
317 rdev->irq.installed = false;
318 flush_delayed_work(&rdev->hotplug_work);
319 return r;
320 }
321
322 DRM_INFO("radeon: irq initialized.\n");
323 return 0;
324 }
325
326 /**
327 * radeon_irq_kms_fini - tear down driver interrupt info
328 *
329 * @rdev: radeon device pointer
330 *
331 * Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics).
332 */
333 void radeon_irq_kms_fini(struct radeon_device *rdev)
334 {
335 drm_vblank_cleanup(rdev->ddev);
336 if (rdev->irq.installed) {
337 drm_irq_uninstall(rdev->ddev);
338 rdev->irq.installed = false;
339 if (rdev->msi_enabled)
340 pci_disable_msi(rdev->pdev);
341 flush_delayed_work(&rdev->hotplug_work);
342 }
343 }
344
345 /**
346 * radeon_irq_kms_sw_irq_get - enable software interrupt
347 *
348 * @rdev: radeon device pointer
349 * @ring: ring whose interrupt you want to enable
350 *
351 * Enables the software interrupt for a specific ring (all asics).
352 * The software interrupt is generally used to signal a fence on
353 * a particular ring.
354 */
355 void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring)
356 {
357 unsigned long irqflags;
358
359 if (!rdev->ddev->irq_enabled)
360 return;
361
362 if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) {
363 spin_lock_irqsave(&rdev->irq.lock, irqflags);
364 radeon_irq_set(rdev);
365 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
366 }
367 }
368
369 /**
370 * radeon_irq_kms_sw_irq_get_delayed - enable software interrupt
371 *
372 * @rdev: radeon device pointer
373 * @ring: ring whose interrupt you want to enable
374 *
375 * Enables the software interrupt for a specific ring (all asics).
376 * The software interrupt is generally used to signal a fence on
377 * a particular ring.
378 */
379 bool radeon_irq_kms_sw_irq_get_delayed(struct radeon_device *rdev, int ring)
380 {
381 return atomic_inc_return(&rdev->irq.ring_int[ring]) == 1;
382 }
383
384 /**
385 * radeon_irq_kms_sw_irq_put - disable software interrupt
386 *
387 * @rdev: radeon device pointer
388 * @ring: ring whose interrupt you want to disable
389 *
390 * Disables the software interrupt for a specific ring (all asics).
391 * The software interrupt is generally used to signal a fence on
392 * a particular ring.
393 */
394 void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring)
395 {
396 unsigned long irqflags;
397
398 if (!rdev->ddev->irq_enabled)
399 return;
400
401 if (atomic_dec_and_test(&rdev->irq.ring_int[ring])) {
402 spin_lock_irqsave(&rdev->irq.lock, irqflags);
403 radeon_irq_set(rdev);
404 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
405 }
406 }
407
408 /**
409 * radeon_irq_kms_pflip_irq_get - enable pageflip interrupt
410 *
411 * @rdev: radeon device pointer
412 * @crtc: crtc whose interrupt you want to enable
413 *
414 * Enables the pageflip interrupt for a specific crtc (all asics).
415 * For pageflips we use the vblank interrupt source.
416 */
417 void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc)
418 {
419 unsigned long irqflags;
420
421 if (crtc < 0 || crtc >= rdev->num_crtc)
422 return;
423
424 if (!rdev->ddev->irq_enabled)
425 return;
426
427 if (atomic_inc_return(&rdev->irq.pflip[crtc]) == 1) {
428 spin_lock_irqsave(&rdev->irq.lock, irqflags);
429 radeon_irq_set(rdev);
430 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
431 }
432 }
433
434 /**
435 * radeon_irq_kms_pflip_irq_put - disable pageflip interrupt
436 *
437 * @rdev: radeon device pointer
438 * @crtc: crtc whose interrupt you want to disable
439 *
440 * Disables the pageflip interrupt for a specific crtc (all asics).
441 * For pageflips we use the vblank interrupt source.
442 */
443 void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc)
444 {
445 unsigned long irqflags;
446
447 if (crtc < 0 || crtc >= rdev->num_crtc)
448 return;
449
450 if (!rdev->ddev->irq_enabled)
451 return;
452
453 if (atomic_dec_and_test(&rdev->irq.pflip[crtc])) {
454 spin_lock_irqsave(&rdev->irq.lock, irqflags);
455 radeon_irq_set(rdev);
456 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
457 }
458 }
459
460 /**
461 * radeon_irq_kms_enable_afmt - enable audio format change interrupt
462 *
463 * @rdev: radeon device pointer
464 * @block: afmt block whose interrupt you want to enable
465 *
466 * Enables the afmt change interrupt for a specific afmt block (all asics).
467 */
468 void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block)
469 {
470 unsigned long irqflags;
471
472 if (!rdev->ddev->irq_enabled)
473 return;
474
475 spin_lock_irqsave(&rdev->irq.lock, irqflags);
476 rdev->irq.afmt[block] = true;
477 radeon_irq_set(rdev);
478 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
479
480 }
481
482 /**
483 * radeon_irq_kms_disable_afmt - disable audio format change interrupt
484 *
485 * @rdev: radeon device pointer
486 * @block: afmt block whose interrupt you want to disable
487 *
488 * Disables the afmt change interrupt for a specific afmt block (all asics).
489 */
490 void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block)
491 {
492 unsigned long irqflags;
493
494 if (!rdev->ddev->irq_enabled)
495 return;
496
497 spin_lock_irqsave(&rdev->irq.lock, irqflags);
498 rdev->irq.afmt[block] = false;
499 radeon_irq_set(rdev);
500 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
501 }
502
503 /**
504 * radeon_irq_kms_enable_hpd - enable hotplug detect interrupt
505 *
506 * @rdev: radeon device pointer
507 * @hpd_mask: mask of hpd pins you want to enable.
508 *
509 * Enables the hotplug detect interrupt for a specific hpd pin (all asics).
510 */
511 void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
512 {
513 unsigned long irqflags;
514 int i;
515
516 if (!rdev->ddev->irq_enabled)
517 return;
518
519 spin_lock_irqsave(&rdev->irq.lock, irqflags);
520 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
521 rdev->irq.hpd[i] |= !!(hpd_mask & (1 << i));
522 radeon_irq_set(rdev);
523 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
524 }
525
526 /**
527 * radeon_irq_kms_disable_hpd - disable hotplug detect interrupt
528 *
529 * @rdev: radeon device pointer
530 * @hpd_mask: mask of hpd pins you want to disable.
531 *
532 * Disables the hotplug detect interrupt for a specific hpd pin (all asics).
533 */
534 void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
535 {
536 unsigned long irqflags;
537 int i;
538
539 if (!rdev->ddev->irq_enabled)
540 return;
541
542 spin_lock_irqsave(&rdev->irq.lock, irqflags);
543 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
544 rdev->irq.hpd[i] &= !(hpd_mask & (1 << i));
545 radeon_irq_set(rdev);
546 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
547 }
548
549