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 "drmP.h" 29 #include "drm_crtc_helper.h" 30 #include "radeon_drm.h" 31 #include "radeon_reg.h" 32 #include "radeon.h" 33 #include "atom.h" 34 35 #define RADEON_WAIT_IDLE_TIMEOUT 200 36 37 /** 38 * radeon_driver_irq_handler_kms - irq handler for KMS 39 * 40 * @DRM_IRQ_ARGS: args 41 * 42 * This is the irq handler for the radeon KMS driver (all asics). 43 * radeon_irq_process is a macro that points to the per-asic 44 * irq handler callback. 45 */ 46 irqreturn_t radeon_driver_irq_handler_kms(DRM_IRQ_ARGS) 47 { 48 struct drm_device *dev = (struct drm_device *) arg; 49 struct radeon_device *rdev = dev->dev_private; 50 51 return radeon_irq_process(rdev); 52 } 53 54 /* 55 * Handle hotplug events outside the interrupt handler proper. 56 */ 57 /** 58 * radeon_hotplug_work_func - display hotplug work handler 59 * 60 * @work: work struct 61 * 62 * This is the hot plug event work handler (all asics). 63 * The work gets scheduled from the irq handler if there 64 * was a hot plug interrupt. It walks the connector table 65 * and calls the hotplug handler for each one, then sends 66 * a drm hotplug event to alert userspace. 67 */ 68 static void radeon_hotplug_work_func(struct work_struct *work) 69 { 70 struct radeon_device *rdev = container_of(work, struct radeon_device, 71 hotplug_work); 72 struct drm_device *dev = rdev->ddev; 73 struct drm_mode_config *mode_config = &dev->mode_config; 74 struct drm_connector *connector; 75 76 if (mode_config->num_connector) { 77 list_for_each_entry(connector, &mode_config->connector_list, head) 78 radeon_connector_hotplug(connector); 79 } 80 /* Just fire off a uevent and let userspace tell us what to do */ 81 drm_helper_hpd_irq_event(dev); 82 } 83 84 /** 85 * radeon_driver_irq_preinstall_kms - drm irq preinstall callback 86 * 87 * @dev: drm dev pointer 88 * 89 * Gets the hw ready to enable irqs (all asics). 90 * This function disables all interrupt sources on the GPU. 91 */ 92 void radeon_driver_irq_preinstall_kms(struct drm_device *dev) 93 { 94 struct radeon_device *rdev = dev->dev_private; 95 unsigned long irqflags; 96 unsigned i; 97 98 spin_lock_irqsave(&rdev->irq.lock, irqflags); 99 /* Disable *all* interrupts */ 100 for (i = 0; i < RADEON_NUM_RINGS; i++) 101 atomic_set(&rdev->irq.ring_int[i], 0); 102 rdev->irq.gui_idle = false; 103 for (i = 0; i < RADEON_MAX_HPD_PINS; i++) 104 rdev->irq.hpd[i] = false; 105 for (i = 0; i < RADEON_MAX_CRTCS; i++) { 106 rdev->irq.crtc_vblank_int[i] = false; 107 atomic_set(&rdev->irq.pflip[i], 0); 108 rdev->irq.afmt[i] = false; 109 } 110 radeon_irq_set(rdev); 111 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 112 /* Clear bits */ 113 radeon_irq_process(rdev); 114 } 115 116 /** 117 * radeon_driver_irq_postinstall_kms - drm irq preinstall callback 118 * 119 * @dev: drm dev pointer 120 * 121 * Handles stuff to be done after enabling irqs (all asics). 122 * Returns 0 on success. 123 */ 124 int radeon_driver_irq_postinstall_kms(struct drm_device *dev) 125 { 126 dev->max_vblank_count = 0x001fffff; 127 return 0; 128 } 129 130 /** 131 * radeon_driver_irq_uninstall_kms - drm irq uninstall callback 132 * 133 * @dev: drm dev pointer 134 * 135 * This function disables all interrupt sources on the GPU (all asics). 136 */ 137 void radeon_driver_irq_uninstall_kms(struct drm_device *dev) 138 { 139 struct radeon_device *rdev = dev->dev_private; 140 unsigned long irqflags; 141 unsigned i; 142 143 if (rdev == NULL) { 144 return; 145 } 146 spin_lock_irqsave(&rdev->irq.lock, irqflags); 147 /* Disable *all* interrupts */ 148 for (i = 0; i < RADEON_NUM_RINGS; i++) 149 atomic_set(&rdev->irq.ring_int[i], 0); 150 rdev->irq.gui_idle = false; 151 for (i = 0; i < RADEON_MAX_HPD_PINS; i++) 152 rdev->irq.hpd[i] = false; 153 for (i = 0; i < RADEON_MAX_CRTCS; i++) { 154 rdev->irq.crtc_vblank_int[i] = false; 155 atomic_set(&rdev->irq.pflip[i], 0); 156 rdev->irq.afmt[i] = false; 157 } 158 radeon_irq_set(rdev); 159 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 160 } 161 162 /** 163 * radeon_msi_ok - asic specific msi checks 164 * 165 * @rdev: radeon device pointer 166 * 167 * Handles asic specific MSI checks to determine if 168 * MSIs should be enabled on a particular chip (all asics). 169 * Returns true if MSIs should be enabled, false if MSIs 170 * should not be enabled. 171 */ 172 static bool radeon_msi_ok(struct radeon_device *rdev) 173 { 174 /* RV370/RV380 was first asic with MSI support */ 175 if (rdev->family < CHIP_RV380) 176 return false; 177 178 /* MSIs don't work on AGP */ 179 if (rdev->flags & RADEON_IS_AGP) 180 return false; 181 182 /* force MSI on */ 183 if (radeon_msi == 1) 184 return true; 185 else if (radeon_msi == 0) 186 return false; 187 188 /* Quirks */ 189 /* HP RS690 only seems to work with MSIs. */ 190 if ((rdev->pdev->device == 0x791f) && 191 (rdev->pdev->subsystem_vendor == 0x103c) && 192 (rdev->pdev->subsystem_device == 0x30c2)) 193 return true; 194 195 /* Dell RS690 only seems to work with MSIs. */ 196 if ((rdev->pdev->device == 0x791f) && 197 (rdev->pdev->subsystem_vendor == 0x1028) && 198 (rdev->pdev->subsystem_device == 0x01fc)) 199 return true; 200 201 /* Dell RS690 only seems to work with MSIs. */ 202 if ((rdev->pdev->device == 0x791f) && 203 (rdev->pdev->subsystem_vendor == 0x1028) && 204 (rdev->pdev->subsystem_device == 0x01fd)) 205 return true; 206 207 /* RV515 seems to have MSI issues where it loses 208 * MSI rearms occasionally. This leads to lockups and freezes. 209 * disable it by default. 210 */ 211 if (rdev->family == CHIP_RV515) 212 return false; 213 if (rdev->flags & RADEON_IS_IGP) { 214 /* APUs work fine with MSIs */ 215 if (rdev->family >= CHIP_PALM) 216 return true; 217 /* lots of IGPs have problems with MSIs */ 218 return false; 219 } 220 221 return true; 222 } 223 224 /** 225 * radeon_irq_kms_init - init driver interrupt info 226 * 227 * @rdev: radeon device pointer 228 * 229 * Sets up the work irq handlers, vblank init, MSIs, etc. (all asics). 230 * Returns 0 for success, error for failure. 231 */ 232 int radeon_irq_kms_init(struct radeon_device *rdev) 233 { 234 int r = 0; 235 236 INIT_WORK(&rdev->hotplug_work, radeon_hotplug_work_func); 237 INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi); 238 239 spin_lock_init(&rdev->irq.lock); 240 r = drm_vblank_init(rdev->ddev, rdev->num_crtc); 241 if (r) { 242 return r; 243 } 244 /* enable msi */ 245 rdev->msi_enabled = 0; 246 247 if (radeon_msi_ok(rdev)) { 248 int ret = pci_enable_msi(rdev->pdev); 249 if (!ret) { 250 rdev->msi_enabled = 1; 251 dev_info(rdev->dev, "radeon: using MSI.\n"); 252 } 253 } 254 rdev->irq.installed = true; 255 r = drm_irq_install(rdev->ddev); 256 if (r) { 257 rdev->irq.installed = false; 258 return r; 259 } 260 DRM_INFO("radeon: irq initialized.\n"); 261 return 0; 262 } 263 264 /** 265 * radeon_irq_kms_fini - tear down driver interrrupt info 266 * 267 * @rdev: radeon device pointer 268 * 269 * Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics). 270 */ 271 void radeon_irq_kms_fini(struct radeon_device *rdev) 272 { 273 drm_vblank_cleanup(rdev->ddev); 274 if (rdev->irq.installed) { 275 drm_irq_uninstall(rdev->ddev); 276 rdev->irq.installed = false; 277 if (rdev->msi_enabled) 278 pci_disable_msi(rdev->pdev); 279 } 280 flush_work_sync(&rdev->hotplug_work); 281 } 282 283 /** 284 * radeon_irq_kms_sw_irq_get - enable software interrupt 285 * 286 * @rdev: radeon device pointer 287 * @ring: ring whose interrupt you want to enable 288 * 289 * Enables the software interrupt for a specific ring (all asics). 290 * The software interrupt is generally used to signal a fence on 291 * a particular ring. 292 */ 293 void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring) 294 { 295 unsigned long irqflags; 296 297 if (!rdev->ddev->irq_enabled) 298 return; 299 300 if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) { 301 spin_lock_irqsave(&rdev->irq.lock, irqflags); 302 radeon_irq_set(rdev); 303 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 304 } 305 } 306 307 /** 308 * radeon_irq_kms_sw_irq_put - disable software interrupt 309 * 310 * @rdev: radeon device pointer 311 * @ring: ring whose interrupt you want to disable 312 * 313 * Disables the software interrupt for a specific ring (all asics). 314 * The software interrupt is generally used to signal a fence on 315 * a particular ring. 316 */ 317 void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring) 318 { 319 unsigned long irqflags; 320 321 if (!rdev->ddev->irq_enabled) 322 return; 323 324 if (atomic_dec_and_test(&rdev->irq.ring_int[ring])) { 325 spin_lock_irqsave(&rdev->irq.lock, irqflags); 326 radeon_irq_set(rdev); 327 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 328 } 329 } 330 331 /** 332 * radeon_irq_kms_pflip_irq_get - enable pageflip interrupt 333 * 334 * @rdev: radeon device pointer 335 * @crtc: crtc whose interrupt you want to enable 336 * 337 * Enables the pageflip interrupt for a specific crtc (all asics). 338 * For pageflips we use the vblank interrupt source. 339 */ 340 void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc) 341 { 342 unsigned long irqflags; 343 344 if (crtc < 0 || crtc >= rdev->num_crtc) 345 return; 346 347 if (!rdev->ddev->irq_enabled) 348 return; 349 350 if (atomic_inc_return(&rdev->irq.pflip[crtc]) == 1) { 351 spin_lock_irqsave(&rdev->irq.lock, irqflags); 352 radeon_irq_set(rdev); 353 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 354 } 355 } 356 357 /** 358 * radeon_irq_kms_pflip_irq_put - disable pageflip interrupt 359 * 360 * @rdev: radeon device pointer 361 * @crtc: crtc whose interrupt you want to disable 362 * 363 * Disables the pageflip interrupt for a specific crtc (all asics). 364 * For pageflips we use the vblank interrupt source. 365 */ 366 void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc) 367 { 368 unsigned long irqflags; 369 370 if (crtc < 0 || crtc >= rdev->num_crtc) 371 return; 372 373 if (!rdev->ddev->irq_enabled) 374 return; 375 376 if (atomic_dec_and_test(&rdev->irq.pflip[crtc])) { 377 spin_lock_irqsave(&rdev->irq.lock, irqflags); 378 radeon_irq_set(rdev); 379 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 380 } 381 } 382 383 /** 384 * radeon_irq_kms_enable_afmt - enable audio format change interrupt 385 * 386 * @rdev: radeon device pointer 387 * @block: afmt block whose interrupt you want to enable 388 * 389 * Enables the afmt change interrupt for a specific afmt block (all asics). 390 */ 391 void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block) 392 { 393 unsigned long irqflags; 394 395 spin_lock_irqsave(&rdev->irq.lock, irqflags); 396 rdev->irq.afmt[block] = true; 397 radeon_irq_set(rdev); 398 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 399 400 } 401 402 /** 403 * radeon_irq_kms_disable_afmt - disable audio format change interrupt 404 * 405 * @rdev: radeon device pointer 406 * @block: afmt block whose interrupt you want to disable 407 * 408 * Disables the afmt change interrupt for a specific afmt block (all asics). 409 */ 410 void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block) 411 { 412 unsigned long irqflags; 413 414 spin_lock_irqsave(&rdev->irq.lock, irqflags); 415 rdev->irq.afmt[block] = false; 416 radeon_irq_set(rdev); 417 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 418 } 419 420 /** 421 * radeon_irq_kms_enable_hpd - enable hotplug detect interrupt 422 * 423 * @rdev: radeon device pointer 424 * @hpd_mask: mask of hpd pins you want to enable. 425 * 426 * Enables the hotplug detect interrupt for a specific hpd pin (all asics). 427 */ 428 void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask) 429 { 430 unsigned long irqflags; 431 int i; 432 433 spin_lock_irqsave(&rdev->irq.lock, irqflags); 434 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i) 435 rdev->irq.hpd[i] |= !!(hpd_mask & (1 << i)); 436 radeon_irq_set(rdev); 437 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 438 } 439 440 /** 441 * radeon_irq_kms_disable_hpd - disable hotplug detect interrupt 442 * 443 * @rdev: radeon device pointer 444 * @hpd_mask: mask of hpd pins you want to disable. 445 * 446 * Disables the hotplug detect interrupt for a specific hpd pin (all asics). 447 */ 448 void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask) 449 { 450 unsigned long irqflags; 451 int i; 452 453 spin_lock_irqsave(&rdev->irq.lock, irqflags); 454 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i) 455 rdev->irq.hpd[i] &= !(hpd_mask & (1 << i)); 456 radeon_irq_set(rdev); 457 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 458 } 459 460 /** 461 * radeon_irq_kms_wait_gui_idle - waits for drawing engine to be idle 462 * 463 * @rdev: radeon device pointer 464 * 465 * Enabled the GUI idle interrupt and waits for it to fire (r6xx+). 466 * This is currently used to make sure the 3D engine is idle for power 467 * management, but should be replaces with proper fence waits. 468 * GUI idle interrupts don't work very well on pre-r6xx hw and it also 469 * does not take into account other aspects of the chip that may be busy. 470 * DO NOT USE GOING FORWARD. 471 */ 472 int radeon_irq_kms_wait_gui_idle(struct radeon_device *rdev) 473 { 474 unsigned long irqflags; 475 int r; 476 477 spin_lock_irqsave(&rdev->irq.lock, irqflags); 478 rdev->irq.gui_idle = true; 479 radeon_irq_set(rdev); 480 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 481 482 r = wait_event_timeout(rdev->irq.idle_queue, radeon_gui_idle(rdev), 483 msecs_to_jiffies(RADEON_WAIT_IDLE_TIMEOUT)); 484 485 spin_lock_irqsave(&rdev->irq.lock, irqflags); 486 rdev->irq.gui_idle = false; 487 radeon_irq_set(rdev); 488 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 489 return r; 490 } 491