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