summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/radeon/radeon_irq_kms.c
blob: d6f27a89a9fe03c5334e95b65ddefa28ed1c7038 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
/*
 * Copyright 2008 Advanced Micro Devices, Inc.
 * Copyright 2008 Red Hat Inc.
 * Copyright 2009 Jerome Glisse.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors: Dave Airlie
 *          Alex Deucher
 *          Jerome Glisse
 */
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
#include <drm/radeon_drm.h>
#include "radeon_reg.h"
#include "radeon.h"
#include "atom.h"

#define RADEON_WAIT_IDLE_TIMEOUT 200

/**
 * radeon_driver_irq_handler_kms - irq handler for KMS
 *
 * @DRM_IRQ_ARGS: args
 *
 * This is the irq handler for the radeon KMS driver (all asics).
 * radeon_irq_process is a macro that points to the per-asic
 * irq handler callback.
 */
irqreturn_t radeon_driver_irq_handler_kms(DRM_IRQ_ARGS)
{
	struct drm_device *dev = (struct drm_device *) arg;
	struct radeon_device *rdev = dev->dev_private;

	return radeon_irq_process(rdev);
}

/*
 * Handle hotplug events outside the interrupt handler proper.
 */
/**
 * radeon_hotplug_work_func - display hotplug work handler
 *
 * @work: work struct
 *
 * This is the hot plug event work handler (all asics).
 * The work gets scheduled from the irq handler if there
 * was a hot plug interrupt.  It walks the connector table
 * and calls the hotplug handler for each one, then sends
 * a drm hotplug event to alert userspace.
 */
static void radeon_hotplug_work_func(struct work_struct *work)
{
	struct radeon_device *rdev = container_of(work, struct radeon_device,
						  hotplug_work);
	struct drm_device *dev = rdev->ddev;
	struct drm_mode_config *mode_config = &dev->mode_config;
	struct drm_connector *connector;

	if (mode_config->num_connector) {
		list_for_each_entry(connector, &mode_config->connector_list, head)
			radeon_connector_hotplug(connector);
	}
	/* Just fire off a uevent and let userspace tell us what to do */
	drm_helper_hpd_irq_event(dev);
}

/**
 * radeon_driver_irq_preinstall_kms - drm irq preinstall callback
 *
 * @dev: drm dev pointer
 *
 * Gets the hw ready to enable irqs (all asics).
 * This function disables all interrupt sources on the GPU.
 */
void radeon_driver_irq_preinstall_kms(struct drm_device *dev)
{
	struct radeon_device *rdev = dev->dev_private;
	unsigned long irqflags;
	unsigned i;

	spin_lock_irqsave(&rdev->irq.lock, irqflags);
	/* Disable *all* interrupts */
	for (i = 0; i < RADEON_NUM_RINGS; i++)
		atomic_set(&rdev->irq.ring_int[i], 0);
	rdev->irq.gui_idle = false;
	for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
		rdev->irq.hpd[i] = false;
	for (i = 0; i < RADEON_MAX_CRTCS; i++) {
		rdev->irq.crtc_vblank_int[i] = false;
		atomic_set(&rdev->irq.pflip[i], 0);
		rdev->irq.afmt[i] = false;
	}
	radeon_irq_set(rdev);
	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
	/* Clear bits */
	radeon_irq_process(rdev);
}

/**
 * radeon_driver_irq_postinstall_kms - drm irq preinstall callback
 *
 * @dev: drm dev pointer
 *
 * Handles stuff to be done after enabling irqs (all asics).
 * Returns 0 on success.
 */
int radeon_driver_irq_postinstall_kms(struct drm_device *dev)
{
	dev->max_vblank_count = 0x001fffff;
	return 0;
}

/**
 * radeon_driver_irq_uninstall_kms - drm irq uninstall callback
 *
 * @dev: drm dev pointer
 *
 * This function disables all interrupt sources on the GPU (all asics).
 */
void radeon_driver_irq_uninstall_kms(struct drm_device *dev)
{
	struct radeon_device *rdev = dev->dev_private;
	unsigned long irqflags;
	unsigned i;

	if (rdev == NULL) {
		return;
	}
	spin_lock_irqsave(&rdev->irq.lock, irqflags);
	/* Disable *all* interrupts */
	for (i = 0; i < RADEON_NUM_RINGS; i++)
		atomic_set(&rdev->irq.ring_int[i], 0);
	rdev->irq.gui_idle = false;
	for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
		rdev->irq.hpd[i] = false;
	for (i = 0; i < RADEON_MAX_CRTCS; i++) {
		rdev->irq.crtc_vblank_int[i] = false;
		atomic_set(&rdev->irq.pflip[i], 0);
		rdev->irq.afmt[i] = false;
	}
	radeon_irq_set(rdev);
	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
}

/**
 * radeon_msi_ok - asic specific msi checks
 *
 * @rdev: radeon device pointer
 *
 * Handles asic specific MSI checks to determine if
 * MSIs should be enabled on a particular chip (all asics).
 * Returns true if MSIs should be enabled, false if MSIs
 * should not be enabled.
 */
static bool radeon_msi_ok(struct radeon_device *rdev)
{
	/* RV370/RV380 was first asic with MSI support */
	if (rdev->family < CHIP_RV380)
		return false;

	/* MSIs don't work on AGP */
	if (rdev->flags & RADEON_IS_AGP)
		return false;

	/* force MSI on */
	if (radeon_msi == 1)
		return true;
	else if (radeon_msi == 0)
		return false;

	/* Quirks */
	/* HP RS690 only seems to work with MSIs. */
	if ((rdev->pdev->device == 0x791f) &&
	    (rdev->pdev->subsystem_vendor == 0x103c) &&
	    (rdev->pdev->subsystem_device == 0x30c2))
		return true;

	/* Dell RS690 only seems to work with MSIs. */
	if ((rdev->pdev->device == 0x791f) &&
	    (rdev->pdev->subsystem_vendor == 0x1028) &&
	    (rdev->pdev->subsystem_device == 0x01fc))
		return true;

	/* Dell RS690 only seems to work with MSIs. */
	if ((rdev->pdev->device == 0x791f) &&
	    (rdev->pdev->subsystem_vendor == 0x1028) &&
	    (rdev->pdev->subsystem_device == 0x01fd))
		return true;

	/* RV515 seems to have MSI issues where it loses
	 * MSI rearms occasionally. This leads to lockups and freezes.
	 * disable it by default.
	 */
	if (rdev->family == CHIP_RV515)
		return false;
	if (rdev->flags & RADEON_IS_IGP) {
		/* APUs work fine with MSIs */
		if (rdev->family >= CHIP_PALM)
			return true;
		/* lots of IGPs have problems with MSIs */
		return false;
	}

	return true;
}

/**
 * radeon_irq_kms_init - init driver interrupt info
 *
 * @rdev: radeon device pointer
 *
 * Sets up the work irq handlers, vblank init, MSIs, etc. (all asics).
 * Returns 0 for success, error for failure.
 */
int radeon_irq_kms_init(struct radeon_device *rdev)
{
	int r = 0;

	INIT_WORK(&rdev->hotplug_work, radeon_hotplug_work_func);
	INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi);

	spin_lock_init(&rdev->irq.lock);
	r = drm_vblank_init(rdev->ddev, rdev->num_crtc);
	if (r) {
		return r;
	}
	/* enable msi */
	rdev->msi_enabled = 0;

	if (radeon_msi_ok(rdev)) {
		int ret = pci_enable_msi(rdev->pdev);
		if (!ret) {
			rdev->msi_enabled = 1;
			dev_info(rdev->dev, "radeon: using MSI.\n");
		}
	}
	rdev->irq.installed = true;
	r = drm_irq_install(rdev->ddev);
	if (r) {
		rdev->irq.installed = false;
		return r;
	}
	DRM_INFO("radeon: irq initialized.\n");
	return 0;
}

/**
 * radeon_irq_kms_fini - tear down driver interrrupt info
 *
 * @rdev: radeon device pointer
 *
 * Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics).
 */
void radeon_irq_kms_fini(struct radeon_device *rdev)
{
	drm_vblank_cleanup(rdev->ddev);
	if (rdev->irq.installed) {
		drm_irq_uninstall(rdev->ddev);
		rdev->irq.installed = false;
		if (rdev->msi_enabled)
			pci_disable_msi(rdev->pdev);
	}
	flush_work_sync(&rdev->hotplug_work);
}

/**
 * radeon_irq_kms_sw_irq_get - enable software interrupt
 *
 * @rdev: radeon device pointer
 * @ring: ring whose interrupt you want to enable
 *
 * Enables the software interrupt for a specific ring (all asics).
 * The software interrupt is generally used to signal a fence on
 * a particular ring.
 */
void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring)
{
	unsigned long irqflags;

	if (!rdev->ddev->irq_enabled)
		return;

	if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) {
		spin_lock_irqsave(&rdev->irq.lock, irqflags);
		radeon_irq_set(rdev);
		spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
	}
}

/**
 * radeon_irq_kms_sw_irq_put - disable software interrupt
 *
 * @rdev: radeon device pointer
 * @ring: ring whose interrupt you want to disable
 *
 * Disables the software interrupt for a specific ring (all asics).
 * The software interrupt is generally used to signal a fence on
 * a particular ring.
 */
void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring)
{
	unsigned long irqflags;

	if (!rdev->ddev->irq_enabled)
		return;

	if (atomic_dec_and_test(&rdev->irq.ring_int[ring])) {
		spin_lock_irqsave(&rdev->irq.lock, irqflags);
		radeon_irq_set(rdev);
		spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
	}
}

/**
 * radeon_irq_kms_pflip_irq_get - enable pageflip interrupt
 *
 * @rdev: radeon device pointer
 * @crtc: crtc whose interrupt you want to enable
 *
 * Enables the pageflip interrupt for a specific crtc (all asics).
 * For pageflips we use the vblank interrupt source.
 */
void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc)
{
	unsigned long irqflags;

	if (crtc < 0 || crtc >= rdev->num_crtc)
		return;

	if (!rdev->ddev->irq_enabled)
		return;

	if (atomic_inc_return(&rdev->irq.pflip[crtc]) == 1) {
		spin_lock_irqsave(&rdev->irq.lock, irqflags);
		radeon_irq_set(rdev);
		spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
	}
}

/**
 * radeon_irq_kms_pflip_irq_put - disable pageflip interrupt
 *
 * @rdev: radeon device pointer
 * @crtc: crtc whose interrupt you want to disable
 *
 * Disables the pageflip interrupt for a specific crtc (all asics).
 * For pageflips we use the vblank interrupt source.
 */
void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc)
{
	unsigned long irqflags;

	if (crtc < 0 || crtc >= rdev->num_crtc)
		return;

	if (!rdev->ddev->irq_enabled)
		return;

	if (atomic_dec_and_test(&rdev->irq.pflip[crtc])) {
		spin_lock_irqsave(&rdev->irq.lock, irqflags);
		radeon_irq_set(rdev);
		spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
	}
}

/**
 * radeon_irq_kms_enable_afmt - enable audio format change interrupt
 *
 * @rdev: radeon device pointer
 * @block: afmt block whose interrupt you want to enable
 *
 * Enables the afmt change interrupt for a specific afmt block (all asics).
 */
void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block)
{
	unsigned long irqflags;

	spin_lock_irqsave(&rdev->irq.lock, irqflags);
	rdev->irq.afmt[block] = true;
	radeon_irq_set(rdev);
	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);

}

/**
 * radeon_irq_kms_disable_afmt - disable audio format change interrupt
 *
 * @rdev: radeon device pointer
 * @block: afmt block whose interrupt you want to disable
 *
 * Disables the afmt change interrupt for a specific afmt block (all asics).
 */
void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block)
{
	unsigned long irqflags;

	spin_lock_irqsave(&rdev->irq.lock, irqflags);
	rdev->irq.afmt[block] = false;
	radeon_irq_set(rdev);
	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
}

/**
 * radeon_irq_kms_enable_hpd - enable hotplug detect interrupt
 *
 * @rdev: radeon device pointer
 * @hpd_mask: mask of hpd pins you want to enable.
 *
 * Enables the hotplug detect interrupt for a specific hpd pin (all asics).
 */
void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
{
	unsigned long irqflags;
	int i;

	spin_lock_irqsave(&rdev->irq.lock, irqflags);
	for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
		rdev->irq.hpd[i] |= !!(hpd_mask & (1 << i));
	radeon_irq_set(rdev);
	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
}

/**
 * radeon_irq_kms_disable_hpd - disable hotplug detect interrupt
 *
 * @rdev: radeon device pointer
 * @hpd_mask: mask of hpd pins you want to disable.
 *
 * Disables the hotplug detect interrupt for a specific hpd pin (all asics).
 */
void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
{
	unsigned long irqflags;
	int i;

	spin_lock_irqsave(&rdev->irq.lock, irqflags);
	for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
		rdev->irq.hpd[i] &= !(hpd_mask & (1 << i));
	radeon_irq_set(rdev);
	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
}

/**
 * radeon_irq_kms_wait_gui_idle - waits for drawing engine to be idle
 *
 * @rdev: radeon device pointer
 *
 * Enabled the GUI idle interrupt and waits for it to fire (r6xx+).
 * This is currently used to make sure the 3D engine is idle for power
 * management, but should be replaces with proper fence waits.
 * GUI idle interrupts don't work very well on pre-r6xx hw and it also
 * does not take into account other aspects of the chip that may be busy.
 * DO NOT USE GOING FORWARD.
 */
int radeon_irq_kms_wait_gui_idle(struct radeon_device *rdev)
{
	unsigned long irqflags;
	int r;

	spin_lock_irqsave(&rdev->irq.lock, irqflags);
	rdev->irq.gui_idle = true;
	radeon_irq_set(rdev);
	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);

	r = wait_event_timeout(rdev->irq.idle_queue, radeon_gui_idle(rdev),
			       msecs_to_jiffies(RADEON_WAIT_IDLE_TIMEOUT));

	spin_lock_irqsave(&rdev->irq.lock, irqflags);
	rdev->irq.gui_idle = false;
	radeon_irq_set(rdev);
	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
	return r;
}