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