radeon_irq_kms.c revision 256281
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 <sys/cdefs.h> 30__FBSDID("$FreeBSD: stable/10/sys/dev/drm2/radeon/radeon_irq_kms.c 254885 2013-08-25 19:37:15Z dumbbell $"); 31 32#include <dev/drm2/drmP.h> 33#include <dev/drm2/drm_crtc_helper.h> 34#include <dev/drm2/radeon/radeon_drm.h> 35#include "radeon_reg.h" 36#include "radeon_irq_kms.h" 37#include "radeon.h" 38#include "atom.h" 39 40#define RADEON_WAIT_IDLE_TIMEOUT 200 41 42/** 43 * radeon_driver_irq_handler_kms - irq handler for KMS 44 * 45 * @DRM_IRQ_ARGS: args 46 * 47 * This is the irq handler for the radeon KMS driver (all asics). 48 * radeon_irq_process is a macro that points to the per-asic 49 * irq handler callback. 50 */ 51irqreturn_t radeon_driver_irq_handler_kms(DRM_IRQ_ARGS) 52{ 53 struct drm_device *dev = (struct drm_device *) arg; 54 struct radeon_device *rdev = dev->dev_private; 55 56 return radeon_irq_process(rdev); 57} 58 59/* 60 * Handle hotplug events outside the interrupt handler proper. 61 */ 62/** 63 * radeon_hotplug_work_func - display hotplug work handler 64 * 65 * @work: work struct 66 * 67 * This is the hot plug event work handler (all asics). 68 * The work gets scheduled from the irq handler if there 69 * was a hot plug interrupt. It walks the connector table 70 * and calls the hotplug handler for each one, then sends 71 * a drm hotplug event to alert userspace. 72 */ 73static void radeon_hotplug_work_func(void *arg, int pending) 74{ 75 struct radeon_device *rdev = arg; 76 struct drm_device *dev = rdev->ddev; 77 struct drm_mode_config *mode_config = &dev->mode_config; 78 struct drm_connector *connector; 79 80 if (mode_config->num_connector) { 81 list_for_each_entry(connector, &mode_config->connector_list, head) 82 radeon_connector_hotplug(connector); 83 } 84 /* Just fire off a uevent and let userspace tell us what to do */ 85 drm_helper_hpd_irq_event(dev); 86} 87 88/** 89 * radeon_driver_irq_preinstall_kms - drm irq preinstall callback 90 * 91 * @dev: drm dev pointer 92 * 93 * Gets the hw ready to enable irqs (all asics). 94 * This function disables all interrupt sources on the GPU. 95 */ 96void radeon_driver_irq_preinstall_kms(struct drm_device *dev) 97{ 98 struct radeon_device *rdev = dev->dev_private; 99 unsigned long irqflags; 100 unsigned i; 101 102 DRM_SPINLOCK_IRQSAVE(&rdev->irq.lock, irqflags); 103 /* Disable *all* interrupts */ 104 for (i = 0; i < RADEON_NUM_RINGS; i++) 105 atomic_set(&rdev->irq.ring_int[i], 0); 106 for (i = 0; i < RADEON_MAX_HPD_PINS; i++) 107 rdev->irq.hpd[i] = false; 108 for (i = 0; i < RADEON_MAX_CRTCS; i++) { 109 rdev->irq.crtc_vblank_int[i] = false; 110 atomic_set(&rdev->irq.pflip[i], 0); 111 rdev->irq.afmt[i] = false; 112 } 113 radeon_irq_set(rdev); 114 DRM_SPINUNLOCK_IRQRESTORE(&rdev->irq.lock, irqflags); 115 /* Clear bits */ 116 radeon_irq_process(rdev); 117} 118 119/** 120 * radeon_driver_irq_postinstall_kms - drm irq preinstall callback 121 * 122 * @dev: drm dev pointer 123 * 124 * Handles stuff to be done after enabling irqs (all asics). 125 * Returns 0 on success. 126 */ 127int radeon_driver_irq_postinstall_kms(struct drm_device *dev) 128{ 129 dev->max_vblank_count = 0x001fffff; 130 return 0; 131} 132 133/** 134 * radeon_driver_irq_uninstall_kms - drm irq uninstall callback 135 * 136 * @dev: drm dev pointer 137 * 138 * This function disables all interrupt sources on the GPU (all asics). 139 */ 140void radeon_driver_irq_uninstall_kms(struct drm_device *dev) 141{ 142 struct radeon_device *rdev = dev->dev_private; 143 unsigned long irqflags; 144 unsigned i; 145 146 if (rdev == NULL) { 147 return; 148 } 149 DRM_SPINLOCK_IRQSAVE(&rdev->irq.lock, irqflags); 150 /* Disable *all* interrupts */ 151 for (i = 0; i < RADEON_NUM_RINGS; i++) 152 atomic_set(&rdev->irq.ring_int[i], 0); 153 for (i = 0; i < RADEON_MAX_HPD_PINS; i++) 154 rdev->irq.hpd[i] = false; 155 for (i = 0; i < RADEON_MAX_CRTCS; i++) { 156 rdev->irq.crtc_vblank_int[i] = false; 157 atomic_set(&rdev->irq.pflip[i], 0); 158 rdev->irq.afmt[i] = false; 159 } 160 radeon_irq_set(rdev); 161 DRM_SPINUNLOCK_IRQRESTORE(&rdev->irq.lock, irqflags); 162} 163 164/** 165 * radeon_msi_ok - asic specific msi checks 166 * 167 * @rdev: radeon device pointer 168 * 169 * Handles asic specific MSI checks to determine if 170 * MSIs should be enabled on a particular chip (all asics). 171 * Returns true if MSIs should be enabled, false if MSIs 172 * should not be enabled. 173 */ 174int radeon_msi_ok(struct drm_device *dev, unsigned long flags) 175{ 176 int family; 177 178 family = flags & RADEON_FAMILY_MASK; 179 180 /* RV370/RV380 was first asic with MSI support */ 181 if (family < CHIP_RV380) 182 return false; 183 184 /* MSIs don't work on AGP */ 185 if (drm_device_is_agp(dev)) 186 return false; 187 188 /* force MSI on */ 189 if (radeon_msi == 1) 190 return true; 191 else if (radeon_msi == 0) 192 return false; 193 194 /* Quirks */ 195 /* HP RS690 only seems to work with MSIs. */ 196 if ((dev->pci_device == 0x791f) && 197 (dev->pci_subvendor == 0x103c) && 198 (dev->pci_subdevice == 0x30c2)) 199 return true; 200 201 /* Dell RS690 only seems to work with MSIs. */ 202 if ((dev->pci_device == 0x791f) && 203 (dev->pci_subvendor == 0x1028) && 204 (dev->pci_subdevice == 0x01fc)) 205 return true; 206 207 /* Dell RS690 only seems to work with MSIs. */ 208 if ((dev->pci_device == 0x791f) && 209 (dev->pci_subvendor == 0x1028) && 210 (dev->pci_subdevice == 0x01fd)) 211 return true; 212 213 /* Gateway RS690 only seems to work with MSIs. */ 214 if ((dev->pci_device == 0x791f) && 215 (dev->pci_subvendor == 0x107b) && 216 (dev->pci_subdevice == 0x0185)) 217 return true; 218 219 /* try and enable MSIs by default on all RS690s */ 220 if (family == CHIP_RS690) 221 return true; 222 223 /* RV515 seems to have MSI issues where it loses 224 * MSI rearms occasionally. This leads to lockups and freezes. 225 * disable it by default. 226 */ 227 if (family == CHIP_RV515) 228 return false; 229 if (flags & RADEON_IS_IGP) { 230 /* APUs work fine with MSIs */ 231 if (family >= CHIP_PALM) 232 return true; 233 /* lots of IGPs have problems with MSIs */ 234 return false; 235 } 236 237 return true; 238} 239 240/** 241 * radeon_irq_kms_init - init driver interrupt info 242 * 243 * @rdev: radeon device pointer 244 * 245 * Sets up the work irq handlers, vblank init, MSIs, etc. (all asics). 246 * Returns 0 for success, error for failure. 247 */ 248int radeon_irq_kms_init(struct radeon_device *rdev) 249{ 250 int r = 0; 251 252 TASK_INIT(&rdev->hotplug_work, 0, radeon_hotplug_work_func, rdev); 253 TASK_INIT(&rdev->audio_work, 0, r600_audio_update_hdmi, rdev); 254 255 DRM_SPININIT(&rdev->irq.lock, "drm__radeon_device__irq__lock"); 256 r = drm_vblank_init(rdev->ddev, rdev->num_crtc); 257 if (r) { 258 return r; 259 } 260 /* enable msi */ 261 rdev->msi_enabled = rdev->ddev->msi_enabled; 262 263 rdev->irq.installed = true; 264 DRM_UNLOCK(rdev->ddev); 265 r = drm_irq_install(rdev->ddev); 266 DRM_LOCK(rdev->ddev); 267 if (r) { 268 rdev->irq.installed = false; 269 return r; 270 } 271 DRM_INFO("radeon: irq initialized.\n"); 272 return 0; 273} 274 275/** 276 * radeon_irq_kms_fini - tear down driver interrrupt info 277 * 278 * @rdev: radeon device pointer 279 * 280 * Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics). 281 */ 282void radeon_irq_kms_fini(struct radeon_device *rdev) 283{ 284 drm_vblank_cleanup(rdev->ddev); 285 if (rdev->irq.installed) { 286 drm_irq_uninstall(rdev->ddev); 287 rdev->irq.installed = false; 288 } 289 taskqueue_drain(rdev->tq, &rdev->hotplug_work); 290} 291 292/** 293 * radeon_irq_kms_sw_irq_get - enable software interrupt 294 * 295 * @rdev: radeon device pointer 296 * @ring: ring whose interrupt you want to enable 297 * 298 * Enables the software interrupt for a specific ring (all asics). 299 * The software interrupt is generally used to signal a fence on 300 * a particular ring. 301 */ 302void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring) 303{ 304 unsigned long irqflags; 305 306 if (!rdev->ddev->irq_enabled) 307 return; 308 309 if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) { 310 DRM_SPINLOCK_IRQSAVE(&rdev->irq.lock, irqflags); 311 radeon_irq_set(rdev); 312 DRM_SPINUNLOCK_IRQRESTORE(&rdev->irq.lock, irqflags); 313 } 314} 315 316/** 317 * radeon_irq_kms_sw_irq_put - disable software interrupt 318 * 319 * @rdev: radeon device pointer 320 * @ring: ring whose interrupt you want to disable 321 * 322 * Disables the software interrupt for a specific ring (all asics). 323 * The software interrupt is generally used to signal a fence on 324 * a particular ring. 325 */ 326void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring) 327{ 328 unsigned long irqflags; 329 330 if (!rdev->ddev->irq_enabled) 331 return; 332 333 if (atomic_dec_and_test(&rdev->irq.ring_int[ring])) { 334 DRM_SPINLOCK_IRQSAVE(&rdev->irq.lock, irqflags); 335 radeon_irq_set(rdev); 336 DRM_SPINUNLOCK_IRQRESTORE(&rdev->irq.lock, irqflags); 337 } 338} 339 340/** 341 * radeon_irq_kms_pflip_irq_get - enable pageflip interrupt 342 * 343 * @rdev: radeon device pointer 344 * @crtc: crtc whose interrupt you want to enable 345 * 346 * Enables the pageflip interrupt for a specific crtc (all asics). 347 * For pageflips we use the vblank interrupt source. 348 */ 349void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc) 350{ 351 unsigned long irqflags; 352 353 if (crtc < 0 || crtc >= rdev->num_crtc) 354 return; 355 356 if (!rdev->ddev->irq_enabled) 357 return; 358 359 if (atomic_inc_return(&rdev->irq.pflip[crtc]) == 1) { 360 DRM_SPINLOCK_IRQSAVE(&rdev->irq.lock, irqflags); 361 radeon_irq_set(rdev); 362 DRM_SPINUNLOCK_IRQRESTORE(&rdev->irq.lock, irqflags); 363 } 364} 365 366/** 367 * radeon_irq_kms_pflip_irq_put - disable pageflip interrupt 368 * 369 * @rdev: radeon device pointer 370 * @crtc: crtc whose interrupt you want to disable 371 * 372 * Disables the pageflip interrupt for a specific crtc (all asics). 373 * For pageflips we use the vblank interrupt source. 374 */ 375void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc) 376{ 377 unsigned long irqflags; 378 379 if (crtc < 0 || crtc >= rdev->num_crtc) 380 return; 381 382 if (!rdev->ddev->irq_enabled) 383 return; 384 385 if (atomic_dec_and_test(&rdev->irq.pflip[crtc])) { 386 DRM_SPINLOCK_IRQSAVE(&rdev->irq.lock, irqflags); 387 radeon_irq_set(rdev); 388 DRM_SPINUNLOCK_IRQRESTORE(&rdev->irq.lock, irqflags); 389 } 390} 391 392/** 393 * radeon_irq_kms_enable_afmt - enable audio format change interrupt 394 * 395 * @rdev: radeon device pointer 396 * @block: afmt block whose interrupt you want to enable 397 * 398 * Enables the afmt change interrupt for a specific afmt block (all asics). 399 */ 400void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block) 401{ 402 unsigned long irqflags; 403 404 DRM_SPINLOCK_IRQSAVE(&rdev->irq.lock, irqflags); 405 rdev->irq.afmt[block] = true; 406 radeon_irq_set(rdev); 407 DRM_SPINUNLOCK_IRQRESTORE(&rdev->irq.lock, irqflags); 408 409} 410 411/** 412 * radeon_irq_kms_disable_afmt - disable audio format change interrupt 413 * 414 * @rdev: radeon device pointer 415 * @block: afmt block whose interrupt you want to disable 416 * 417 * Disables the afmt change interrupt for a specific afmt block (all asics). 418 */ 419void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block) 420{ 421 unsigned long irqflags; 422 423 DRM_SPINLOCK_IRQSAVE(&rdev->irq.lock, irqflags); 424 rdev->irq.afmt[block] = false; 425 radeon_irq_set(rdev); 426 DRM_SPINUNLOCK_IRQRESTORE(&rdev->irq.lock, irqflags); 427} 428 429/** 430 * radeon_irq_kms_enable_hpd - enable hotplug detect interrupt 431 * 432 * @rdev: radeon device pointer 433 * @hpd_mask: mask of hpd pins you want to enable. 434 * 435 * Enables the hotplug detect interrupt for a specific hpd pin (all asics). 436 */ 437void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask) 438{ 439 unsigned long irqflags; 440 int i; 441 442 DRM_SPINLOCK_IRQSAVE(&rdev->irq.lock, irqflags); 443 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i) 444 rdev->irq.hpd[i] |= !!(hpd_mask & (1 << i)); 445 radeon_irq_set(rdev); 446 DRM_SPINUNLOCK_IRQRESTORE(&rdev->irq.lock, irqflags); 447} 448 449/** 450 * radeon_irq_kms_disable_hpd - disable hotplug detect interrupt 451 * 452 * @rdev: radeon device pointer 453 * @hpd_mask: mask of hpd pins you want to disable. 454 * 455 * Disables the hotplug detect interrupt for a specific hpd pin (all asics). 456 */ 457void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask) 458{ 459 unsigned long irqflags; 460 int i; 461 462 DRM_SPINLOCK_IRQSAVE(&rdev->irq.lock, irqflags); 463 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i) 464 rdev->irq.hpd[i] &= !(hpd_mask & (1 << i)); 465 radeon_irq_set(rdev); 466 DRM_SPINUNLOCK_IRQRESTORE(&rdev->irq.lock, irqflags); 467} 468 469