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