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