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