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);
78 struct drm_device *dev = rdev->ddev;
79 struct drm_mode_config *mode_config = &dev->mode_config;
80 struct drm_connector *connector;
81
82 mutex_lock(&mode_config->mutex);
83 if (mode_config->num_connector) {
84 list_for_each_entry(connector, &mode_config->connector_list, head)
85 radeon_connector_hotplug(connector);
86 }
87 mutex_unlock(&mode_config->mutex);
88 /* Just fire off a uevent and let userspace tell us what to do */
89 drm_helper_hpd_irq_event(dev);
90 }
91
radeon_dp_work_func(struct work_struct * work)92 static void radeon_dp_work_func(struct work_struct *work)
93 {
94 struct radeon_device *rdev = container_of(work, struct radeon_device,
95 dp_work);
96 struct drm_device *dev = rdev->ddev;
97 struct drm_mode_config *mode_config = &dev->mode_config;
98 struct drm_connector *connector;
99
100 /* this should take a mutex */
101 if (mode_config->num_connector) {
102 list_for_each_entry(connector, &mode_config->connector_list, head)
103 radeon_connector_hotplug(connector);
104 }
105 }
106 /**
107 * radeon_driver_irq_preinstall_kms - drm irq preinstall callback
108 *
109 * @dev: drm dev pointer
110 *
111 * Gets the hw ready to enable irqs (all asics).
112 * This function disables all interrupt sources on the GPU.
113 */
radeon_driver_irq_preinstall_kms(struct drm_device * dev)114 void radeon_driver_irq_preinstall_kms(struct drm_device *dev)
115 {
116 struct radeon_device *rdev = dev->dev_private;
117 unsigned long irqflags;
118 unsigned i;
119
120 spin_lock_irqsave(&rdev->irq.lock, irqflags);
121 /* Disable *all* interrupts */
122 for (i = 0; i < RADEON_NUM_RINGS; i++)
123 atomic_set(&rdev->irq.ring_int[i], 0);
124 rdev->irq.dpm_thermal = false;
125 for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
126 rdev->irq.hpd[i] = false;
127 for (i = 0; i < RADEON_MAX_CRTCS; i++) {
128 rdev->irq.crtc_vblank_int[i] = false;
129 atomic_set(&rdev->irq.pflip[i], 0);
130 rdev->irq.afmt[i] = false;
131 }
132 radeon_irq_set(rdev);
133 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
134 /* Clear bits */
135 radeon_irq_process(rdev);
136 }
137
138 /**
139 * radeon_driver_irq_postinstall_kms - drm irq preinstall callback
140 *
141 * @dev: drm dev pointer
142 *
143 * Handles stuff to be done after enabling irqs (all asics).
144 * Returns 0 on success.
145 */
radeon_driver_irq_postinstall_kms(struct drm_device * dev)146 int radeon_driver_irq_postinstall_kms(struct drm_device *dev)
147 {
148 dev->max_vblank_count = 0x001fffff;
149 return 0;
150 }
151
152 /**
153 * radeon_driver_irq_uninstall_kms - drm irq uninstall callback
154 *
155 * @dev: drm dev pointer
156 *
157 * This function disables all interrupt sources on the GPU (all asics).
158 */
radeon_driver_irq_uninstall_kms(struct drm_device * dev)159 void radeon_driver_irq_uninstall_kms(struct drm_device *dev)
160 {
161 struct radeon_device *rdev = dev->dev_private;
162 unsigned long irqflags;
163 unsigned i;
164
165 if (rdev == NULL) {
166 return;
167 }
168 spin_lock_irqsave(&rdev->irq.lock, irqflags);
169 /* Disable *all* interrupts */
170 for (i = 0; i < RADEON_NUM_RINGS; i++)
171 atomic_set(&rdev->irq.ring_int[i], 0);
172 rdev->irq.dpm_thermal = false;
173 for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
174 rdev->irq.hpd[i] = false;
175 for (i = 0; i < RADEON_MAX_CRTCS; i++) {
176 rdev->irq.crtc_vblank_int[i] = false;
177 atomic_set(&rdev->irq.pflip[i], 0);
178 rdev->irq.afmt[i] = false;
179 }
180 radeon_irq_set(rdev);
181 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
182 }
183
184 /**
185 * radeon_msi_ok - asic specific msi checks
186 *
187 * @rdev: radeon device pointer
188 *
189 * Handles asic specific MSI checks to determine if
190 * MSIs should be enabled on a particular chip (all asics).
191 * Returns true if MSIs should be enabled, false if MSIs
192 * should not be enabled.
193 */
radeon_msi_ok(struct radeon_device * rdev)194 static bool radeon_msi_ok(struct radeon_device *rdev)
195 {
196 /* RV370/RV380 was first asic with MSI support */
197 if (rdev->family < CHIP_RV380)
198 return false;
199
200 /* MSIs don't work on AGP */
201 if (rdev->flags & RADEON_IS_AGP)
202 return false;
203
204 /*
205 * Older chips have a HW limitation, they can only generate 40 bits
206 * of address for "64-bit" MSIs which breaks on some platforms, notably
207 * IBM POWER servers, so we limit them
208 */
209 if (rdev->family < CHIP_BONAIRE) {
210 dev_info(rdev->dev, "radeon: MSI limited to 32-bit\n");
211 rdev->pdev->no_64bit_msi = 1;
212 }
213
214 /* force MSI on */
215 if (radeon_msi == 1)
216 return true;
217 else if (radeon_msi == 0)
218 return false;
219
220 /* Quirks */
221 /* HP RS690 only seems to work with MSIs. */
222 if ((rdev->pdev->device == 0x791f) &&
223 (rdev->pdev->subsystem_vendor == 0x103c) &&
224 (rdev->pdev->subsystem_device == 0x30c2))
225 return true;
226
227 /* Dell RS690 only seems to work with MSIs. */
228 if ((rdev->pdev->device == 0x791f) &&
229 (rdev->pdev->subsystem_vendor == 0x1028) &&
230 (rdev->pdev->subsystem_device == 0x01fc))
231 return true;
232
233 /* Dell RS690 only seems to work with MSIs. */
234 if ((rdev->pdev->device == 0x791f) &&
235 (rdev->pdev->subsystem_vendor == 0x1028) &&
236 (rdev->pdev->subsystem_device == 0x01fd))
237 return true;
238
239 /* Gateway RS690 only seems to work with MSIs. */
240 if ((rdev->pdev->device == 0x791f) &&
241 (rdev->pdev->subsystem_vendor == 0x107b) &&
242 (rdev->pdev->subsystem_device == 0x0185))
243 return true;
244
245 /* try and enable MSIs by default on all RS690s */
246 if (rdev->family == CHIP_RS690)
247 return true;
248
249 /* RV515 seems to have MSI issues where it loses
250 * MSI rearms occasionally. This leads to lockups and freezes.
251 * disable it by default.
252 */
253 if (rdev->family == CHIP_RV515)
254 return false;
255 if (rdev->flags & RADEON_IS_IGP) {
256 /* APUs work fine with MSIs */
257 if (rdev->family >= CHIP_PALM)
258 return true;
259 /* lots of IGPs have problems with MSIs */
260 return false;
261 }
262
263 return true;
264 }
265
266 /**
267 * radeon_irq_kms_init - init driver interrupt info
268 *
269 * @rdev: radeon device pointer
270 *
271 * Sets up the work irq handlers, vblank init, MSIs, etc. (all asics).
272 * Returns 0 for success, error for failure.
273 */
radeon_irq_kms_init(struct radeon_device * rdev)274 int radeon_irq_kms_init(struct radeon_device *rdev)
275 {
276 int r = 0;
277
278 spin_lock_init(&rdev->irq.lock);
279 r = drm_vblank_init(rdev->ddev, rdev->num_crtc);
280 if (r) {
281 return r;
282 }
283 /* enable msi */
284 rdev->msi_enabled = 0;
285
286 if (radeon_msi_ok(rdev)) {
287 int ret = pci_enable_msi(rdev->pdev);
288 if (!ret) {
289 rdev->msi_enabled = 1;
290 dev_info(rdev->dev, "radeon: using MSI.\n");
291 }
292 }
293
294 INIT_WORK(&rdev->hotplug_work, radeon_hotplug_work_func);
295 INIT_WORK(&rdev->dp_work, radeon_dp_work_func);
296 INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi);
297
298 rdev->irq.installed = true;
299 r = drm_irq_install(rdev->ddev, rdev->ddev->pdev->irq);
300 if (r) {
301 rdev->irq.installed = false;
302 flush_work(&rdev->hotplug_work);
303 return r;
304 }
305
306 DRM_INFO("radeon: irq initialized.\n");
307 return 0;
308 }
309
310 /**
311 * radeon_irq_kms_fini - tear down driver interrupt info
312 *
313 * @rdev: radeon device pointer
314 *
315 * Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics).
316 */
radeon_irq_kms_fini(struct radeon_device * rdev)317 void radeon_irq_kms_fini(struct radeon_device *rdev)
318 {
319 drm_vblank_cleanup(rdev->ddev);
320 if (rdev->irq.installed) {
321 drm_irq_uninstall(rdev->ddev);
322 rdev->irq.installed = false;
323 if (rdev->msi_enabled)
324 pci_disable_msi(rdev->pdev);
325 flush_work(&rdev->hotplug_work);
326 }
327 }
328
329 /**
330 * radeon_irq_kms_sw_irq_get - enable software interrupt
331 *
332 * @rdev: radeon device pointer
333 * @ring: ring whose interrupt you want to enable
334 *
335 * Enables the software interrupt for a specific ring (all asics).
336 * The software interrupt is generally used to signal a fence on
337 * a particular ring.
338 */
radeon_irq_kms_sw_irq_get(struct radeon_device * rdev,int ring)339 void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring)
340 {
341 unsigned long irqflags;
342
343 if (!rdev->ddev->irq_enabled)
344 return;
345
346 if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) {
347 spin_lock_irqsave(&rdev->irq.lock, irqflags);
348 radeon_irq_set(rdev);
349 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
350 }
351 }
352
353 /**
354 * radeon_irq_kms_sw_irq_get_delayed - enable software interrupt
355 *
356 * @rdev: radeon device pointer
357 * @ring: ring whose interrupt you want to enable
358 *
359 * Enables the software interrupt for a specific ring (all asics).
360 * The software interrupt is generally used to signal a fence on
361 * a particular ring.
362 */
radeon_irq_kms_sw_irq_get_delayed(struct radeon_device * rdev,int ring)363 bool radeon_irq_kms_sw_irq_get_delayed(struct radeon_device *rdev, int ring)
364 {
365 return atomic_inc_return(&rdev->irq.ring_int[ring]) == 1;
366 }
367
368 /**
369 * radeon_irq_kms_sw_irq_put - disable software interrupt
370 *
371 * @rdev: radeon device pointer
372 * @ring: ring whose interrupt you want to disable
373 *
374 * Disables 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_put(struct radeon_device * rdev,int ring)378 void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring)
379 {
380 unsigned long irqflags;
381
382 if (!rdev->ddev->irq_enabled)
383 return;
384
385 if (atomic_dec_and_test(&rdev->irq.ring_int[ring])) {
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_pflip_irq_get - enable pageflip interrupt
394 *
395 * @rdev: radeon device pointer
396 * @crtc: crtc whose interrupt you want to enable
397 *
398 * Enables the pageflip interrupt for a specific crtc (all asics).
399 * For pageflips we use the vblank interrupt source.
400 */
radeon_irq_kms_pflip_irq_get(struct radeon_device * rdev,int crtc)401 void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc)
402 {
403 unsigned long irqflags;
404
405 if (crtc < 0 || crtc >= rdev->num_crtc)
406 return;
407
408 if (!rdev->ddev->irq_enabled)
409 return;
410
411 if (atomic_inc_return(&rdev->irq.pflip[crtc]) == 1) {
412 spin_lock_irqsave(&rdev->irq.lock, irqflags);
413 radeon_irq_set(rdev);
414 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
415 }
416 }
417
418 /**
419 * radeon_irq_kms_pflip_irq_put - disable pageflip interrupt
420 *
421 * @rdev: radeon device pointer
422 * @crtc: crtc whose interrupt you want to disable
423 *
424 * Disables the pageflip interrupt for a specific crtc (all asics).
425 * For pageflips we use the vblank interrupt source.
426 */
radeon_irq_kms_pflip_irq_put(struct radeon_device * rdev,int crtc)427 void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc)
428 {
429 unsigned long irqflags;
430
431 if (crtc < 0 || crtc >= rdev->num_crtc)
432 return;
433
434 if (!rdev->ddev->irq_enabled)
435 return;
436
437 if (atomic_dec_and_test(&rdev->irq.pflip[crtc])) {
438 spin_lock_irqsave(&rdev->irq.lock, irqflags);
439 radeon_irq_set(rdev);
440 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
441 }
442 }
443
444 /**
445 * radeon_irq_kms_enable_afmt - enable audio format change interrupt
446 *
447 * @rdev: radeon device pointer
448 * @block: afmt block whose interrupt you want to enable
449 *
450 * Enables the afmt change interrupt for a specific afmt block (all asics).
451 */
radeon_irq_kms_enable_afmt(struct radeon_device * rdev,int block)452 void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block)
453 {
454 unsigned long irqflags;
455
456 if (!rdev->ddev->irq_enabled)
457 return;
458
459 spin_lock_irqsave(&rdev->irq.lock, irqflags);
460 rdev->irq.afmt[block] = true;
461 radeon_irq_set(rdev);
462 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
463
464 }
465
466 /**
467 * radeon_irq_kms_disable_afmt - disable audio format change interrupt
468 *
469 * @rdev: radeon device pointer
470 * @block: afmt block whose interrupt you want to disable
471 *
472 * Disables the afmt change interrupt for a specific afmt block (all asics).
473 */
radeon_irq_kms_disable_afmt(struct radeon_device * rdev,int block)474 void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block)
475 {
476 unsigned long irqflags;
477
478 if (!rdev->ddev->irq_enabled)
479 return;
480
481 spin_lock_irqsave(&rdev->irq.lock, irqflags);
482 rdev->irq.afmt[block] = false;
483 radeon_irq_set(rdev);
484 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
485 }
486
487 /**
488 * radeon_irq_kms_enable_hpd - enable hotplug detect interrupt
489 *
490 * @rdev: radeon device pointer
491 * @hpd_mask: mask of hpd pins you want to enable.
492 *
493 * Enables the hotplug detect interrupt for a specific hpd pin (all asics).
494 */
radeon_irq_kms_enable_hpd(struct radeon_device * rdev,unsigned hpd_mask)495 void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
496 {
497 unsigned long irqflags;
498 int i;
499
500 if (!rdev->ddev->irq_enabled)
501 return;
502
503 spin_lock_irqsave(&rdev->irq.lock, irqflags);
504 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
505 rdev->irq.hpd[i] |= !!(hpd_mask & (1 << i));
506 radeon_irq_set(rdev);
507 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
508 }
509
510 /**
511 * radeon_irq_kms_disable_hpd - disable hotplug detect interrupt
512 *
513 * @rdev: radeon device pointer
514 * @hpd_mask: mask of hpd pins you want to disable.
515 *
516 * Disables the hotplug detect interrupt for a specific hpd pin (all asics).
517 */
radeon_irq_kms_disable_hpd(struct radeon_device * rdev,unsigned hpd_mask)518 void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
519 {
520 unsigned long irqflags;
521 int i;
522
523 if (!rdev->ddev->irq_enabled)
524 return;
525
526 spin_lock_irqsave(&rdev->irq.lock, irqflags);
527 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
528 rdev->irq.hpd[i] &= !(hpd_mask & (1 << i));
529 radeon_irq_set(rdev);
530 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
531 }
532
533