2 * Copyright 2008 Advanced Micro Devices, Inc.
3 * Copyright 2008 Red Hat Inc.
4 * Copyright 2009 Jerome Glisse.
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:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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.
24 * Authors: Dave Airlie
29 #include <linux/pci.h>
30 #include <linux/pm_runtime.h>
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>
40 #include "radeon_kms.h"
41 #include "radeon_reg.h"
44 #define RADEON_WAIT_IDLE_TIMEOUT 200
47 * radeon_driver_irq_handler_kms - irq handler for KMS
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.
53 static irqreturn_t radeon_driver_irq_handler_kms(int irq, void *arg)
55 struct drm_device *dev = (struct drm_device *) arg;
56 struct radeon_device *rdev = dev->dev_private;
59 ret = radeon_irq_process(rdev);
60 if (ret == IRQ_HANDLED)
61 pm_runtime_mark_last_busy(dev->dev);
66 * Handle hotplug events outside the interrupt handler proper.
69 * radeon_hotplug_work_func - display hotplug work handler
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.
79 static void radeon_hotplug_work_func(struct work_struct *work)
81 struct radeon_device *rdev = container_of(work, struct radeon_device,
83 struct drm_device *dev = rdev->ddev;
84 struct drm_mode_config *mode_config = &dev->mode_config;
85 struct drm_connector *connector;
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)
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);
100 static void radeon_dp_work_func(struct work_struct *work)
102 struct radeon_device *rdev = container_of(work, struct radeon_device,
104 struct drm_device *dev = rdev->ddev;
105 struct drm_mode_config *mode_config = &dev->mode_config;
106 struct drm_connector *connector;
108 mutex_lock(&mode_config->mutex);
109 list_for_each_entry(connector, &mode_config->connector_list, head)
110 radeon_connector_hotplug(connector);
111 mutex_unlock(&mode_config->mutex);
115 * radeon_driver_irq_preinstall_kms - drm irq preinstall callback
117 * @dev: drm dev pointer
119 * Gets the hw ready to enable irqs (all asics).
120 * This function disables all interrupt sources on the GPU.
122 static void radeon_driver_irq_preinstall_kms(struct drm_device *dev)
124 struct radeon_device *rdev = dev->dev_private;
125 unsigned long irqflags;
128 spin_lock_irqsave(&rdev->irq.lock, irqflags);
129 /* Disable *all* interrupts */
130 for (i = 0; i < RADEON_NUM_RINGS; i++)
131 atomic_set(&rdev->irq.ring_int[i], 0);
132 rdev->irq.dpm_thermal = false;
133 for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
134 rdev->irq.hpd[i] = false;
135 for (i = 0; i < RADEON_MAX_CRTCS; i++) {
136 rdev->irq.crtc_vblank_int[i] = false;
137 atomic_set(&rdev->irq.pflip[i], 0);
138 rdev->irq.afmt[i] = false;
140 radeon_irq_set(rdev);
141 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
143 radeon_irq_process(rdev);
147 * radeon_driver_irq_postinstall_kms - drm irq preinstall callback
149 * @dev: drm dev pointer
151 * Handles stuff to be done after enabling irqs (all asics).
152 * Returns 0 on success.
154 static int radeon_driver_irq_postinstall_kms(struct drm_device *dev)
156 struct radeon_device *rdev = dev->dev_private;
158 if (ASIC_IS_AVIVO(rdev))
159 dev->max_vblank_count = 0x00ffffff;
161 dev->max_vblank_count = 0x001fffff;
167 * radeon_driver_irq_uninstall_kms - drm irq uninstall callback
169 * @dev: drm dev pointer
171 * This function disables all interrupt sources on the GPU (all asics).
173 static void radeon_driver_irq_uninstall_kms(struct drm_device *dev)
175 struct radeon_device *rdev = dev->dev_private;
176 unsigned long irqflags;
182 spin_lock_irqsave(&rdev->irq.lock, irqflags);
183 /* Disable *all* interrupts */
184 for (i = 0; i < RADEON_NUM_RINGS; i++)
185 atomic_set(&rdev->irq.ring_int[i], 0);
186 rdev->irq.dpm_thermal = false;
187 for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
188 rdev->irq.hpd[i] = false;
189 for (i = 0; i < RADEON_MAX_CRTCS; i++) {
190 rdev->irq.crtc_vblank_int[i] = false;
191 atomic_set(&rdev->irq.pflip[i], 0);
192 rdev->irq.afmt[i] = false;
194 radeon_irq_set(rdev);
195 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
198 static int radeon_irq_install(struct radeon_device *rdev, int irq)
200 struct drm_device *dev = rdev->ddev;
203 if (irq == IRQ_NOTCONNECTED)
206 radeon_driver_irq_preinstall_kms(dev);
208 /* PCI devices require shared interrupts. */
209 ret = request_irq(irq, radeon_driver_irq_handler_kms,
210 IRQF_SHARED, dev->driver->name, dev);
214 radeon_driver_irq_postinstall_kms(dev);
219 static void radeon_irq_uninstall(struct radeon_device *rdev)
221 struct drm_device *dev = rdev->ddev;
222 struct pci_dev *pdev = to_pci_dev(dev->dev);
224 radeon_driver_irq_uninstall_kms(dev);
225 free_irq(pdev->irq, dev);
229 * radeon_msi_ok - asic specific msi checks
231 * @rdev: radeon device pointer
233 * Handles asic specific MSI checks to determine if
234 * MSIs should be enabled on a particular chip (all asics).
235 * Returns true if MSIs should be enabled, false if MSIs
236 * should not be enabled.
238 static bool radeon_msi_ok(struct radeon_device *rdev)
240 /* RV370/RV380 was first asic with MSI support */
241 if (rdev->family < CHIP_RV380)
244 /* MSIs don't work on AGP */
245 if (rdev->flags & RADEON_IS_AGP)
249 * Older chips have a HW limitation, they can only generate 40 bits
250 * of address for "64-bit" MSIs which breaks on some platforms, notably
251 * IBM POWER servers, so we limit them
253 if (rdev->family < CHIP_BONAIRE) {
254 dev_info(rdev->dev, "radeon: MSI limited to 32-bit\n");
255 rdev->pdev->no_64bit_msi = 1;
261 else if (radeon_msi == 0)
265 /* HP RS690 only seems to work with MSIs. */
266 if ((rdev->pdev->device == 0x791f) &&
267 (rdev->pdev->subsystem_vendor == 0x103c) &&
268 (rdev->pdev->subsystem_device == 0x30c2))
271 /* Dell RS690 only seems to work with MSIs. */
272 if ((rdev->pdev->device == 0x791f) &&
273 (rdev->pdev->subsystem_vendor == 0x1028) &&
274 (rdev->pdev->subsystem_device == 0x01fc))
277 /* Dell RS690 only seems to work with MSIs. */
278 if ((rdev->pdev->device == 0x791f) &&
279 (rdev->pdev->subsystem_vendor == 0x1028) &&
280 (rdev->pdev->subsystem_device == 0x01fd))
283 /* Gateway RS690 only seems to work with MSIs. */
284 if ((rdev->pdev->device == 0x791f) &&
285 (rdev->pdev->subsystem_vendor == 0x107b) &&
286 (rdev->pdev->subsystem_device == 0x0185))
289 /* try and enable MSIs by default on all RS690s */
290 if (rdev->family == CHIP_RS690)
293 /* RV515 seems to have MSI issues where it loses
294 * MSI rearms occasionally. This leads to lockups and freezes.
295 * disable it by default.
297 if (rdev->family == CHIP_RV515)
299 if (rdev->flags & RADEON_IS_IGP) {
300 /* APUs work fine with MSIs */
301 if (rdev->family >= CHIP_PALM)
303 /* lots of IGPs have problems with MSIs */
311 * radeon_irq_kms_init - init driver interrupt info
313 * @rdev: radeon device pointer
315 * Sets up the work irq handlers, vblank init, MSIs, etc. (all asics).
316 * Returns 0 for success, error for failure.
318 int radeon_irq_kms_init(struct radeon_device *rdev)
322 spin_lock_init(&rdev->irq.lock);
324 /* Disable vblank irqs aggressively for power-saving */
325 rdev->ddev->vblank_disable_immediate = true;
327 r = drm_vblank_init(rdev->ddev, rdev->num_crtc);
333 rdev->msi_enabled = 0;
335 if (radeon_msi_ok(rdev)) {
336 int ret = pci_enable_msi(rdev->pdev);
338 rdev->msi_enabled = 1;
339 dev_info(rdev->dev, "radeon: using MSI.\n");
343 INIT_DELAYED_WORK(&rdev->hotplug_work, radeon_hotplug_work_func);
344 INIT_WORK(&rdev->dp_work, radeon_dp_work_func);
345 INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi);
347 rdev->irq.installed = true;
348 r = radeon_irq_install(rdev, rdev->pdev->irq);
350 rdev->irq.installed = false;
351 flush_delayed_work(&rdev->hotplug_work);
355 DRM_INFO("radeon: irq initialized.\n");
360 * radeon_irq_kms_fini - tear down driver interrupt info
362 * @rdev: radeon device pointer
364 * Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics).
366 void radeon_irq_kms_fini(struct radeon_device *rdev)
368 if (rdev->irq.installed) {
369 radeon_irq_uninstall(rdev);
370 rdev->irq.installed = false;
371 if (rdev->msi_enabled)
372 pci_disable_msi(rdev->pdev);
373 flush_delayed_work(&rdev->hotplug_work);
378 * radeon_irq_kms_sw_irq_get - enable software interrupt
380 * @rdev: radeon device pointer
381 * @ring: ring whose interrupt you want to enable
383 * Enables the software interrupt for a specific ring (all asics).
384 * The software interrupt is generally used to signal a fence on
387 void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring)
389 unsigned long irqflags;
391 if (!rdev->irq.installed)
394 if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) {
395 spin_lock_irqsave(&rdev->irq.lock, irqflags);
396 radeon_irq_set(rdev);
397 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
402 * radeon_irq_kms_sw_irq_get_delayed - enable software interrupt
404 * @rdev: radeon device pointer
405 * @ring: ring whose interrupt you want to enable
407 * Enables the software interrupt for a specific ring (all asics).
408 * The software interrupt is generally used to signal a fence on
411 bool radeon_irq_kms_sw_irq_get_delayed(struct radeon_device *rdev, int ring)
413 return atomic_inc_return(&rdev->irq.ring_int[ring]) == 1;
417 * radeon_irq_kms_sw_irq_put - disable software interrupt
419 * @rdev: radeon device pointer
420 * @ring: ring whose interrupt you want to disable
422 * Disables the software interrupt for a specific ring (all asics).
423 * The software interrupt is generally used to signal a fence on
426 void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring)
428 unsigned long irqflags;
430 if (!rdev->irq.installed)
433 if (atomic_dec_and_test(&rdev->irq.ring_int[ring])) {
434 spin_lock_irqsave(&rdev->irq.lock, irqflags);
435 radeon_irq_set(rdev);
436 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
441 * radeon_irq_kms_pflip_irq_get - enable pageflip interrupt
443 * @rdev: radeon device pointer
444 * @crtc: crtc whose interrupt you want to enable
446 * Enables the pageflip interrupt for a specific crtc (all asics).
447 * For pageflips we use the vblank interrupt source.
449 void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc)
451 unsigned long irqflags;
453 if (crtc < 0 || crtc >= rdev->num_crtc)
456 if (!rdev->irq.installed)
459 if (atomic_inc_return(&rdev->irq.pflip[crtc]) == 1) {
460 spin_lock_irqsave(&rdev->irq.lock, irqflags);
461 radeon_irq_set(rdev);
462 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
467 * radeon_irq_kms_pflip_irq_put - disable pageflip interrupt
469 * @rdev: radeon device pointer
470 * @crtc: crtc whose interrupt you want to disable
472 * Disables the pageflip interrupt for a specific crtc (all asics).
473 * For pageflips we use the vblank interrupt source.
475 void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc)
477 unsigned long irqflags;
479 if (crtc < 0 || crtc >= rdev->num_crtc)
482 if (!rdev->irq.installed)
485 if (atomic_dec_and_test(&rdev->irq.pflip[crtc])) {
486 spin_lock_irqsave(&rdev->irq.lock, irqflags);
487 radeon_irq_set(rdev);
488 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
493 * radeon_irq_kms_enable_afmt - enable audio format change interrupt
495 * @rdev: radeon device pointer
496 * @block: afmt block whose interrupt you want to enable
498 * Enables the afmt change interrupt for a specific afmt block (all asics).
500 void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block)
502 unsigned long irqflags;
504 if (!rdev->irq.installed)
507 spin_lock_irqsave(&rdev->irq.lock, irqflags);
508 rdev->irq.afmt[block] = true;
509 radeon_irq_set(rdev);
510 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
515 * radeon_irq_kms_disable_afmt - disable audio format change interrupt
517 * @rdev: radeon device pointer
518 * @block: afmt block whose interrupt you want to disable
520 * Disables the afmt change interrupt for a specific afmt block (all asics).
522 void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block)
524 unsigned long irqflags;
526 if (!rdev->irq.installed)
529 spin_lock_irqsave(&rdev->irq.lock, irqflags);
530 rdev->irq.afmt[block] = false;
531 radeon_irq_set(rdev);
532 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
536 * radeon_irq_kms_enable_hpd - enable hotplug detect interrupt
538 * @rdev: radeon device pointer
539 * @hpd_mask: mask of hpd pins you want to enable.
541 * Enables the hotplug detect interrupt for a specific hpd pin (all asics).
543 void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
545 unsigned long irqflags;
548 if (!rdev->irq.installed)
551 spin_lock_irqsave(&rdev->irq.lock, irqflags);
552 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
553 rdev->irq.hpd[i] |= !!(hpd_mask & (1 << i));
554 radeon_irq_set(rdev);
555 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
559 * radeon_irq_kms_disable_hpd - disable hotplug detect interrupt
561 * @rdev: radeon device pointer
562 * @hpd_mask: mask of hpd pins you want to disable.
564 * Disables the hotplug detect interrupt for a specific hpd pin (all asics).
566 void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
568 unsigned long irqflags;
571 if (!rdev->irq.installed)
574 spin_lock_irqsave(&rdev->irq.lock, irqflags);
575 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
576 rdev->irq.hpd[i] &= !(hpd_mask & (1 << i));
577 radeon_irq_set(rdev);
578 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
582 * radeon_irq_kms_set_irq_n_enabled - helper for updating interrupt enable registers
584 * @rdev: radeon device pointer
585 * @reg: the register to write to enable/disable interrupts
586 * @mask: the mask that enables the interrupts
587 * @enable: whether to enable or disable the interrupt register
588 * @name: the name of the interrupt register to print to the kernel log
589 * @n: the number of the interrupt register to print to the kernel log
591 * Helper for updating the enable state of interrupt registers. Checks whether
592 * or not the interrupt matches the enable state we want. If it doesn't, then
593 * we update it and print a debugging message to the kernel log indicating the
594 * new state of the interrupt register.
596 * Used for updating sequences of interrupts registers like HPD1, HPD2, etc.
598 void radeon_irq_kms_set_irq_n_enabled(struct radeon_device *rdev,
600 bool enable, const char *name, unsigned n)
602 u32 tmp = RREG32(reg);
604 /* Interrupt state didn't change */
605 if (!!(tmp & mask) == enable)
609 DRM_DEBUG("%s%d interrupts enabled\n", name, n);
610 WREG32(reg, tmp |= mask);
612 DRM_DEBUG("%s%d interrupts disabled\n", name, n);
613 WREG32(reg, tmp & ~mask);