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
29 #include <linux/pci.h>
30 #include <linux/pm_runtime.h>
31
32 #include <drm/drm_crtc_helper.h>
33 #include <drm/drm_device.h>
34 #include <drm/drm_drv.h>
35 #include <drm/drm_probe_helper.h>
36 #include <drm/drm_vblank.h>
37 #include <drm/radeon_drm.h>
38
39 #include "atom.h"
40 #include "radeon.h"
41 #include "radeon_kms.h"
42 #include "radeon_reg.h"
43
44
45 #define RADEON_WAIT_IDLE_TIMEOUT 200
46
47 /*
48 * radeon_driver_irq_handler_kms - irq handler for KMS
49 *
50 * This is the irq handler for the radeon KMS driver (all asics).
51 * radeon_irq_process is a macro that points to the per-asic
52 * irq handler callback.
53 */
radeon_driver_irq_handler_kms(int irq,void * arg)54 static irqreturn_t radeon_driver_irq_handler_kms(int irq, void *arg)
55 {
56 struct drm_device *dev = (struct drm_device *) arg;
57 struct radeon_device *rdev = dev->dev_private;
58 irqreturn_t ret;
59
60 ret = radeon_irq_process(rdev);
61 if (ret == IRQ_HANDLED)
62 pm_runtime_mark_last_busy(dev->dev);
63 return ret;
64 }
65
66 /*
67 * Handle hotplug events outside the interrupt handler proper.
68 */
69 /**
70 * radeon_hotplug_work_func - display hotplug work handler
71 *
72 * @work: work struct
73 *
74 * This is the hot plug event work handler (all asics).
75 * The work gets scheduled from the irq handler if there
76 * was a hot plug interrupt. It walks the connector table
77 * and calls the hotplug handler for each one, then sends
78 * a drm hotplug event to alert userspace.
79 */
radeon_hotplug_work_func(struct work_struct * work)80 static void radeon_hotplug_work_func(struct work_struct *work)
81 {
82 struct radeon_device *rdev = container_of(work, struct radeon_device,
83 hotplug_work.work);
84 struct drm_device *dev = rdev->ddev;
85 struct drm_mode_config *mode_config = &dev->mode_config;
86 struct drm_connector *connector;
87
88 /* we can race here at startup, some boards seem to trigger
89 * hotplug irqs when they shouldn't. */
90 if (!rdev->mode_info.mode_config_initialized)
91 return;
92
93 mutex_lock(&mode_config->mutex);
94 list_for_each_entry(connector, &mode_config->connector_list, head)
95 radeon_connector_hotplug(connector);
96 mutex_unlock(&mode_config->mutex);
97 /* Just fire off a uevent and let userspace tell us what to do */
98 drm_helper_hpd_irq_event(dev);
99 }
100
radeon_dp_work_func(struct work_struct * work)101 static void radeon_dp_work_func(struct work_struct *work)
102 {
103 struct radeon_device *rdev = container_of(work, struct radeon_device,
104 dp_work);
105 struct drm_device *dev = rdev->ddev;
106 struct drm_mode_config *mode_config = &dev->mode_config;
107 struct drm_connector *connector;
108
109 /* this should take a mutex */
110 list_for_each_entry(connector, &mode_config->connector_list, head)
111 radeon_connector_hotplug(connector);
112 }
113 /**
114 * radeon_driver_irq_preinstall_kms - drm irq preinstall callback
115 *
116 * @dev: drm dev pointer
117 *
118 * Gets the hw ready to enable irqs (all asics).
119 * This function disables all interrupt sources on the GPU.
120 */
radeon_driver_irq_preinstall_kms(struct drm_device * dev)121 static void radeon_driver_irq_preinstall_kms(struct drm_device *dev)
122 {
123 struct radeon_device *rdev = dev->dev_private;
124 unsigned long irqflags;
125 unsigned i;
126
127 spin_lock_irqsave(&rdev->irq.lock, irqflags);
128 /* Disable *all* interrupts */
129 for (i = 0; i < RADEON_NUM_RINGS; i++)
130 atomic_set(&rdev->irq.ring_int[i], 0);
131 rdev->irq.dpm_thermal = false;
132 for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
133 rdev->irq.hpd[i] = false;
134 for (i = 0; i < RADEON_MAX_CRTCS; i++) {
135 rdev->irq.crtc_vblank_int[i] = false;
136 atomic_set(&rdev->irq.pflip[i], 0);
137 rdev->irq.afmt[i] = false;
138 }
139 radeon_irq_set(rdev);
140 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
141 /* Clear bits */
142 radeon_irq_process(rdev);
143 }
144
145 /**
146 * radeon_driver_irq_postinstall_kms - drm irq preinstall callback
147 *
148 * @dev: drm dev pointer
149 *
150 * Handles stuff to be done after enabling irqs (all asics).
151 * Returns 0 on success.
152 */
radeon_driver_irq_postinstall_kms(struct drm_device * dev)153 static int radeon_driver_irq_postinstall_kms(struct drm_device *dev)
154 {
155 struct radeon_device *rdev = dev->dev_private;
156
157 if (ASIC_IS_AVIVO(rdev))
158 dev->max_vblank_count = 0x00ffffff;
159 else
160 dev->max_vblank_count = 0x001fffff;
161
162 return 0;
163 }
164
165 /**
166 * radeon_driver_irq_uninstall_kms - drm irq uninstall callback
167 *
168 * @dev: drm dev pointer
169 *
170 * This function disables all interrupt sources on the GPU (all asics).
171 */
radeon_driver_irq_uninstall_kms(struct drm_device * dev)172 static void radeon_driver_irq_uninstall_kms(struct drm_device *dev)
173 {
174 struct radeon_device *rdev = dev->dev_private;
175 unsigned long irqflags;
176 unsigned i;
177
178 if (rdev == NULL) {
179 return;
180 }
181 spin_lock_irqsave(&rdev->irq.lock, irqflags);
182 /* Disable *all* interrupts */
183 for (i = 0; i < RADEON_NUM_RINGS; i++)
184 atomic_set(&rdev->irq.ring_int[i], 0);
185 rdev->irq.dpm_thermal = false;
186 for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
187 rdev->irq.hpd[i] = false;
188 for (i = 0; i < RADEON_MAX_CRTCS; i++) {
189 rdev->irq.crtc_vblank_int[i] = false;
190 atomic_set(&rdev->irq.pflip[i], 0);
191 rdev->irq.afmt[i] = false;
192 }
193 radeon_irq_set(rdev);
194 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
195 }
196
radeon_irq_install(struct radeon_device * rdev,int irq)197 static int radeon_irq_install(struct radeon_device *rdev, int irq)
198 {
199 struct drm_device *dev = rdev->ddev;
200 int ret;
201
202 if (irq == IRQ_NOTCONNECTED)
203 return -ENOTCONN;
204
205 radeon_driver_irq_preinstall_kms(dev);
206
207 /* PCI devices require shared interrupts. */
208 ret = request_irq(irq, radeon_driver_irq_handler_kms,
209 IRQF_SHARED, dev->driver->name, dev);
210 if (ret)
211 return ret;
212
213 radeon_driver_irq_postinstall_kms(dev);
214
215 return 0;
216 }
217
radeon_irq_uninstall(struct radeon_device * rdev)218 static void radeon_irq_uninstall(struct radeon_device *rdev)
219 {
220 struct drm_device *dev = rdev->ddev;
221 struct pci_dev *pdev = to_pci_dev(dev->dev);
222
223 radeon_driver_irq_uninstall_kms(dev);
224 free_irq(pdev->irq, dev);
225 }
226
227 /**
228 * radeon_msi_ok - asic specific msi checks
229 *
230 * @rdev: radeon device pointer
231 *
232 * Handles asic specific MSI checks to determine if
233 * MSIs should be enabled on a particular chip (all asics).
234 * Returns true if MSIs should be enabled, false if MSIs
235 * should not be enabled.
236 */
radeon_msi_ok(struct radeon_device * rdev)237 static bool radeon_msi_ok(struct radeon_device *rdev)
238 {
239 /* RV370/RV380 was first asic with MSI support */
240 if (rdev->family < CHIP_RV380)
241 return false;
242
243 /* MSIs don't work on AGP */
244 if (rdev->flags & RADEON_IS_AGP)
245 return false;
246
247 /*
248 * Older chips have a HW limitation, they can only generate 40 bits
249 * of address for "64-bit" MSIs which breaks on some platforms, notably
250 * IBM POWER servers, so we limit them
251 */
252 if (rdev->family < CHIP_BONAIRE) {
253 dev_info(rdev->dev, "radeon: MSI limited to 32-bit\n");
254 rdev->pdev->no_64bit_msi = 1;
255 }
256
257 /* force MSI on */
258 if (radeon_msi == 1)
259 return true;
260 else if (radeon_msi == 0)
261 return false;
262
263 /* Quirks */
264 /* HP RS690 only seems to work with MSIs. */
265 if ((rdev->pdev->device == 0x791f) &&
266 (rdev->pdev->subsystem_vendor == 0x103c) &&
267 (rdev->pdev->subsystem_device == 0x30c2))
268 return true;
269
270 /* Dell RS690 only seems to work with MSIs. */
271 if ((rdev->pdev->device == 0x791f) &&
272 (rdev->pdev->subsystem_vendor == 0x1028) &&
273 (rdev->pdev->subsystem_device == 0x01fc))
274 return true;
275
276 /* Dell RS690 only seems to work with MSIs. */
277 if ((rdev->pdev->device == 0x791f) &&
278 (rdev->pdev->subsystem_vendor == 0x1028) &&
279 (rdev->pdev->subsystem_device == 0x01fd))
280 return true;
281
282 /* Gateway RS690 only seems to work with MSIs. */
283 if ((rdev->pdev->device == 0x791f) &&
284 (rdev->pdev->subsystem_vendor == 0x107b) &&
285 (rdev->pdev->subsystem_device == 0x0185))
286 return true;
287
288 /* try and enable MSIs by default on all RS690s */
289 if (rdev->family == CHIP_RS690)
290 return true;
291
292 /* RV515 seems to have MSI issues where it loses
293 * MSI rearms occasionally. This leads to lockups and freezes.
294 * disable it by default.
295 */
296 if (rdev->family == CHIP_RV515)
297 return false;
298 if (rdev->flags & RADEON_IS_IGP) {
299 /* APUs work fine with MSIs */
300 if (rdev->family >= CHIP_PALM)
301 return true;
302 /* lots of IGPs have problems with MSIs */
303 return false;
304 }
305
306 return true;
307 }
308
309 /**
310 * radeon_irq_kms_init - init driver interrupt info
311 *
312 * @rdev: radeon device pointer
313 *
314 * Sets up the work irq handlers, vblank init, MSIs, etc. (all asics).
315 * Returns 0 for success, error for failure.
316 */
radeon_irq_kms_init(struct radeon_device * rdev)317 int radeon_irq_kms_init(struct radeon_device *rdev)
318 {
319 int r = 0;
320
321 spin_lock_init(&rdev->irq.lock);
322
323 /* Disable vblank irqs aggressively for power-saving */
324 rdev->ddev->vblank_disable_immediate = true;
325
326 r = drm_vblank_init(rdev->ddev, rdev->num_crtc);
327 if (r) {
328 return r;
329 }
330
331 /* enable msi */
332 rdev->msi_enabled = 0;
333
334 if (radeon_msi_ok(rdev)) {
335 int ret = pci_enable_msi(rdev->pdev);
336 if (!ret) {
337 rdev->msi_enabled = 1;
338 dev_info(rdev->dev, "radeon: using MSI.\n");
339 }
340 }
341
342 INIT_DELAYED_WORK(&rdev->hotplug_work, radeon_hotplug_work_func);
343 INIT_WORK(&rdev->dp_work, radeon_dp_work_func);
344 INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi);
345
346 rdev->irq.installed = true;
347 r = radeon_irq_install(rdev, rdev->pdev->irq);
348 if (r) {
349 rdev->irq.installed = false;
350 flush_delayed_work(&rdev->hotplug_work);
351 return r;
352 }
353
354 DRM_INFO("radeon: irq initialized.\n");
355 return 0;
356 }
357
358 /**
359 * radeon_irq_kms_fini - tear down driver interrupt info
360 *
361 * @rdev: radeon device pointer
362 *
363 * Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics).
364 */
radeon_irq_kms_fini(struct radeon_device * rdev)365 void radeon_irq_kms_fini(struct radeon_device *rdev)
366 {
367 if (rdev->irq.installed) {
368 radeon_irq_uninstall(rdev);
369 rdev->irq.installed = false;
370 if (rdev->msi_enabled)
371 pci_disable_msi(rdev->pdev);
372 flush_delayed_work(&rdev->hotplug_work);
373 }
374 }
375
376 /**
377 * radeon_irq_kms_sw_irq_get - enable software interrupt
378 *
379 * @rdev: radeon device pointer
380 * @ring: ring whose interrupt you want to enable
381 *
382 * Enables the software interrupt for a specific ring (all asics).
383 * The software interrupt is generally used to signal a fence on
384 * a particular ring.
385 */
radeon_irq_kms_sw_irq_get(struct radeon_device * rdev,int ring)386 void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring)
387 {
388 unsigned long irqflags;
389
390 if (!rdev->irq.installed)
391 return;
392
393 if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) {
394 spin_lock_irqsave(&rdev->irq.lock, irqflags);
395 radeon_irq_set(rdev);
396 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
397 }
398 }
399
400 /**
401 * radeon_irq_kms_sw_irq_get_delayed - enable software interrupt
402 *
403 * @rdev: radeon device pointer
404 * @ring: ring whose interrupt you want to enable
405 *
406 * Enables the software interrupt for a specific ring (all asics).
407 * The software interrupt is generally used to signal a fence on
408 * a particular ring.
409 */
radeon_irq_kms_sw_irq_get_delayed(struct radeon_device * rdev,int ring)410 bool radeon_irq_kms_sw_irq_get_delayed(struct radeon_device *rdev, int ring)
411 {
412 return atomic_inc_return(&rdev->irq.ring_int[ring]) == 1;
413 }
414
415 /**
416 * radeon_irq_kms_sw_irq_put - disable software interrupt
417 *
418 * @rdev: radeon device pointer
419 * @ring: ring whose interrupt you want to disable
420 *
421 * Disables the software interrupt for a specific ring (all asics).
422 * The software interrupt is generally used to signal a fence on
423 * a particular ring.
424 */
radeon_irq_kms_sw_irq_put(struct radeon_device * rdev,int ring)425 void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring)
426 {
427 unsigned long irqflags;
428
429 if (!rdev->irq.installed)
430 return;
431
432 if (atomic_dec_and_test(&rdev->irq.ring_int[ring])) {
433 spin_lock_irqsave(&rdev->irq.lock, irqflags);
434 radeon_irq_set(rdev);
435 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
436 }
437 }
438
439 /**
440 * radeon_irq_kms_pflip_irq_get - enable pageflip interrupt
441 *
442 * @rdev: radeon device pointer
443 * @crtc: crtc whose interrupt you want to enable
444 *
445 * Enables the pageflip interrupt for a specific crtc (all asics).
446 * For pageflips we use the vblank interrupt source.
447 */
radeon_irq_kms_pflip_irq_get(struct radeon_device * rdev,int crtc)448 void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc)
449 {
450 unsigned long irqflags;
451
452 if (crtc < 0 || crtc >= rdev->num_crtc)
453 return;
454
455 if (!rdev->irq.installed)
456 return;
457
458 if (atomic_inc_return(&rdev->irq.pflip[crtc]) == 1) {
459 spin_lock_irqsave(&rdev->irq.lock, irqflags);
460 radeon_irq_set(rdev);
461 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
462 }
463 }
464
465 /**
466 * radeon_irq_kms_pflip_irq_put - disable pageflip interrupt
467 *
468 * @rdev: radeon device pointer
469 * @crtc: crtc whose interrupt you want to disable
470 *
471 * Disables the pageflip interrupt for a specific crtc (all asics).
472 * For pageflips we use the vblank interrupt source.
473 */
radeon_irq_kms_pflip_irq_put(struct radeon_device * rdev,int crtc)474 void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc)
475 {
476 unsigned long irqflags;
477
478 if (crtc < 0 || crtc >= rdev->num_crtc)
479 return;
480
481 if (!rdev->irq.installed)
482 return;
483
484 if (atomic_dec_and_test(&rdev->irq.pflip[crtc])) {
485 spin_lock_irqsave(&rdev->irq.lock, irqflags);
486 radeon_irq_set(rdev);
487 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
488 }
489 }
490
491 /**
492 * radeon_irq_kms_enable_afmt - enable audio format change interrupt
493 *
494 * @rdev: radeon device pointer
495 * @block: afmt block whose interrupt you want to enable
496 *
497 * Enables the afmt change interrupt for a specific afmt block (all asics).
498 */
radeon_irq_kms_enable_afmt(struct radeon_device * rdev,int block)499 void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block)
500 {
501 unsigned long irqflags;
502
503 if (!rdev->irq.installed)
504 return;
505
506 spin_lock_irqsave(&rdev->irq.lock, irqflags);
507 rdev->irq.afmt[block] = true;
508 radeon_irq_set(rdev);
509 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
510
511 }
512
513 /**
514 * radeon_irq_kms_disable_afmt - disable audio format change interrupt
515 *
516 * @rdev: radeon device pointer
517 * @block: afmt block whose interrupt you want to disable
518 *
519 * Disables the afmt change interrupt for a specific afmt block (all asics).
520 */
radeon_irq_kms_disable_afmt(struct radeon_device * rdev,int block)521 void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block)
522 {
523 unsigned long irqflags;
524
525 if (!rdev->irq.installed)
526 return;
527
528 spin_lock_irqsave(&rdev->irq.lock, irqflags);
529 rdev->irq.afmt[block] = false;
530 radeon_irq_set(rdev);
531 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
532 }
533
534 /**
535 * radeon_irq_kms_enable_hpd - enable hotplug detect interrupt
536 *
537 * @rdev: radeon device pointer
538 * @hpd_mask: mask of hpd pins you want to enable.
539 *
540 * Enables the hotplug detect interrupt for a specific hpd pin (all asics).
541 */
radeon_irq_kms_enable_hpd(struct radeon_device * rdev,unsigned hpd_mask)542 void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
543 {
544 unsigned long irqflags;
545 int i;
546
547 if (!rdev->irq.installed)
548 return;
549
550 spin_lock_irqsave(&rdev->irq.lock, irqflags);
551 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
552 rdev->irq.hpd[i] |= !!(hpd_mask & (1 << i));
553 radeon_irq_set(rdev);
554 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
555 }
556
557 /**
558 * radeon_irq_kms_disable_hpd - disable hotplug detect interrupt
559 *
560 * @rdev: radeon device pointer
561 * @hpd_mask: mask of hpd pins you want to disable.
562 *
563 * Disables the hotplug detect interrupt for a specific hpd pin (all asics).
564 */
radeon_irq_kms_disable_hpd(struct radeon_device * rdev,unsigned hpd_mask)565 void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
566 {
567 unsigned long irqflags;
568 int i;
569
570 if (!rdev->irq.installed)
571 return;
572
573 spin_lock_irqsave(&rdev->irq.lock, irqflags);
574 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
575 rdev->irq.hpd[i] &= !(hpd_mask & (1 << i));
576 radeon_irq_set(rdev);
577 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
578 }
579
580 /**
581 * radeon_irq_kms_set_irq_n_enabled - helper for updating interrupt enable registers
582 *
583 * @rdev: radeon device pointer
584 * @reg: the register to write to enable/disable interrupts
585 * @mask: the mask that enables the interrupts
586 * @enable: whether to enable or disable the interrupt register
587 * @name: the name of the interrupt register to print to the kernel log
588 * @n: the number of the interrupt register to print to the kernel log
589 *
590 * Helper for updating the enable state of interrupt registers. Checks whether
591 * or not the interrupt matches the enable state we want. If it doesn't, then
592 * we update it and print a debugging message to the kernel log indicating the
593 * new state of the interrupt register.
594 *
595 * Used for updating sequences of interrupts registers like HPD1, HPD2, etc.
596 */
radeon_irq_kms_set_irq_n_enabled(struct radeon_device * rdev,u32 reg,u32 mask,bool enable,const char * name,unsigned n)597 void radeon_irq_kms_set_irq_n_enabled(struct radeon_device *rdev,
598 u32 reg, u32 mask,
599 bool enable, const char *name, unsigned n)
600 {
601 u32 tmp = RREG32(reg);
602
603 /* Interrupt state didn't change */
604 if (!!(tmp & mask) == enable)
605 return;
606
607 if (enable) {
608 DRM_DEBUG("%s%d interrupts enabled\n", name, n);
609 WREG32(reg, tmp |= mask);
610 } else {
611 DRM_DEBUG("%s%d interrupts disabled\n", name, n);
612 WREG32(reg, tmp & ~mask);
613 }
614 }
615