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 <linux/pm_runtime.h> 30 31 #include <drm/drm_crtc_helper.h> 32 #include <drm/drm_device.h> 33 #include <drm/drm_irq.h> 34 #include <drm/drm_pci.h> 35 #include <drm/drm_probe_helper.h> 36 #include <drm/drm_vblank.h> 37 #include <drm/radeon_drm.h> 38 39 #include "atom.h" 40 #include "radeon.h" 41 #include "radeon_reg.h" 42 43 44 #define RADEON_WAIT_IDLE_TIMEOUT 200 45 46 /** 47 * radeon_driver_irq_handler_kms - irq handler for KMS 48 * 49 * @int irq, void *arg: args 50 * 51 * This is the irq handler for the radeon KMS driver (all asics). 52 * radeon_irq_process is a macro that points to the per-asic 53 * irq handler callback. 54 */ 55 irqreturn_t radeon_driver_irq_handler_kms(int irq, void *arg) 56 { 57 struct drm_device *dev = (struct drm_device *) arg; 58 struct radeon_device *rdev = dev->dev_private; 59 irqreturn_t ret; 60 61 ret = radeon_irq_process(rdev); 62 if (ret == IRQ_HANDLED) 63 pm_runtime_mark_last_busy(dev->dev); 64 return ret; 65 } 66 67 /* 68 * Handle hotplug events outside the interrupt handler proper. 69 */ 70 /** 71 * radeon_hotplug_work_func - display hotplug work handler 72 * 73 * @work: work struct 74 * 75 * This is the hot plug event work handler (all asics). 76 * The work gets scheduled from the irq handler if there 77 * was a hot plug interrupt. It walks the connector table 78 * and calls the hotplug handler for each one, then sends 79 * a drm hotplug event to alert userspace. 80 */ 81 static void radeon_hotplug_work_func(struct work_struct *work) 82 { 83 struct radeon_device *rdev = container_of(work, struct radeon_device, 84 hotplug_work.work); 85 struct drm_device *dev = rdev->ddev; 86 struct drm_mode_config *mode_config = &dev->mode_config; 87 struct drm_connector *connector; 88 89 /* we can race here at startup, some boards seem to trigger 90 * hotplug irqs when they shouldn't. */ 91 if (!rdev->mode_info.mode_config_initialized) 92 return; 93 94 mutex_lock(&mode_config->mutex); 95 list_for_each_entry(connector, &mode_config->connector_list, head) 96 radeon_connector_hotplug(connector); 97 mutex_unlock(&mode_config->mutex); 98 /* Just fire off a uevent and let userspace tell us what to do */ 99 drm_helper_hpd_irq_event(dev); 100 } 101 102 static void radeon_dp_work_func(struct work_struct *work) 103 { 104 struct radeon_device *rdev = container_of(work, struct radeon_device, 105 dp_work); 106 struct drm_device *dev = rdev->ddev; 107 struct drm_mode_config *mode_config = &dev->mode_config; 108 struct drm_connector *connector; 109 110 /* this should take a mutex */ 111 list_for_each_entry(connector, &mode_config->connector_list, head) 112 radeon_connector_hotplug(connector); 113 } 114 /** 115 * radeon_driver_irq_preinstall_kms - drm irq preinstall callback 116 * 117 * @dev: drm dev pointer 118 * 119 * Gets the hw ready to enable irqs (all asics). 120 * This function disables all interrupt sources on the GPU. 121 */ 122 void radeon_driver_irq_preinstall_kms(struct drm_device *dev) 123 { 124 struct radeon_device *rdev = dev->dev_private; 125 unsigned long irqflags; 126 unsigned i; 127 128 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; 139 } 140 radeon_irq_set(rdev); 141 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 142 /* Clear bits */ 143 radeon_irq_process(rdev); 144 } 145 146 /** 147 * radeon_driver_irq_postinstall_kms - drm irq preinstall callback 148 * 149 * @dev: drm dev pointer 150 * 151 * Handles stuff to be done after enabling irqs (all asics). 152 * Returns 0 on success. 153 */ 154 int radeon_driver_irq_postinstall_kms(struct drm_device *dev) 155 { 156 struct radeon_device *rdev = dev->dev_private; 157 158 if (ASIC_IS_AVIVO(rdev)) 159 dev->max_vblank_count = 0x00ffffff; 160 else 161 dev->max_vblank_count = 0x001fffff; 162 163 return 0; 164 } 165 166 /** 167 * radeon_driver_irq_uninstall_kms - drm irq uninstall callback 168 * 169 * @dev: drm dev pointer 170 * 171 * This function disables all interrupt sources on the GPU (all asics). 172 */ 173 void radeon_driver_irq_uninstall_kms(struct drm_device *dev) 174 { 175 struct radeon_device *rdev = dev->dev_private; 176 unsigned long irqflags; 177 unsigned i; 178 179 if (rdev == NULL) { 180 return; 181 } 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; 193 } 194 radeon_irq_set(rdev); 195 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 196 } 197 198 /** 199 * radeon_msi_ok - asic specific msi checks 200 * 201 * @rdev: radeon device pointer 202 * 203 * Handles asic specific MSI checks to determine if 204 * MSIs should be enabled on a particular chip (all asics). 205 * Returns true if MSIs should be enabled, false if MSIs 206 * should not be enabled. 207 */ 208 static bool radeon_msi_ok(struct radeon_device *rdev) 209 { 210 /* RV370/RV380 was first asic with MSI support */ 211 if (rdev->family < CHIP_RV380) 212 return false; 213 214 /* MSIs don't work on AGP */ 215 if (rdev->flags & RADEON_IS_AGP) 216 return false; 217 218 /* 219 * Older chips have a HW limitation, they can only generate 40 bits 220 * of address for "64-bit" MSIs which breaks on some platforms, notably 221 * IBM POWER servers, so we limit them 222 */ 223 if (rdev->family < CHIP_BONAIRE) { 224 dev_info(rdev->dev, "radeon: MSI limited to 32-bit\n"); 225 rdev->pdev->no_64bit_msi = 1; 226 } 227 228 /* force MSI on */ 229 if (radeon_msi == 1) 230 return true; 231 else if (radeon_msi == 0) 232 return false; 233 234 /* Quirks */ 235 /* HP RS690 only seems to work with MSIs. */ 236 if ((rdev->pdev->device == 0x791f) && 237 (rdev->pdev->subsystem_vendor == 0x103c) && 238 (rdev->pdev->subsystem_device == 0x30c2)) 239 return true; 240 241 /* Dell RS690 only seems to work with MSIs. */ 242 if ((rdev->pdev->device == 0x791f) && 243 (rdev->pdev->subsystem_vendor == 0x1028) && 244 (rdev->pdev->subsystem_device == 0x01fc)) 245 return true; 246 247 /* Dell RS690 only seems to work with MSIs. */ 248 if ((rdev->pdev->device == 0x791f) && 249 (rdev->pdev->subsystem_vendor == 0x1028) && 250 (rdev->pdev->subsystem_device == 0x01fd)) 251 return true; 252 253 /* Gateway RS690 only seems to work with MSIs. */ 254 if ((rdev->pdev->device == 0x791f) && 255 (rdev->pdev->subsystem_vendor == 0x107b) && 256 (rdev->pdev->subsystem_device == 0x0185)) 257 return true; 258 259 /* try and enable MSIs by default on all RS690s */ 260 if (rdev->family == CHIP_RS690) 261 return true; 262 263 /* RV515 seems to have MSI issues where it loses 264 * MSI rearms occasionally. This leads to lockups and freezes. 265 * disable it by default. 266 */ 267 if (rdev->family == CHIP_RV515) 268 return false; 269 if (rdev->flags & RADEON_IS_IGP) { 270 /* APUs work fine with MSIs */ 271 if (rdev->family >= CHIP_PALM) 272 return true; 273 /* lots of IGPs have problems with MSIs */ 274 return false; 275 } 276 277 return true; 278 } 279 280 /** 281 * radeon_irq_kms_init - init driver interrupt info 282 * 283 * @rdev: radeon device pointer 284 * 285 * Sets up the work irq handlers, vblank init, MSIs, etc. (all asics). 286 * Returns 0 for success, error for failure. 287 */ 288 int radeon_irq_kms_init(struct radeon_device *rdev) 289 { 290 int r = 0; 291 292 spin_lock_init(&rdev->irq.lock); 293 294 /* Disable vblank irqs aggressively for power-saving */ 295 rdev->ddev->vblank_disable_immediate = true; 296 297 r = drm_vblank_init(rdev->ddev, rdev->num_crtc); 298 if (r) { 299 return r; 300 } 301 302 /* enable msi */ 303 rdev->msi_enabled = 0; 304 305 if (radeon_msi_ok(rdev)) { 306 int ret = pci_enable_msi(rdev->pdev); 307 if (!ret) { 308 rdev->msi_enabled = 1; 309 dev_info(rdev->dev, "radeon: using MSI.\n"); 310 } 311 } 312 313 INIT_DELAYED_WORK(&rdev->hotplug_work, radeon_hotplug_work_func); 314 INIT_WORK(&rdev->dp_work, radeon_dp_work_func); 315 INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi); 316 317 rdev->irq.installed = true; 318 r = drm_irq_install(rdev->ddev, rdev->ddev->pdev->irq); 319 if (r) { 320 rdev->irq.installed = false; 321 flush_delayed_work(&rdev->hotplug_work); 322 return r; 323 } 324 325 DRM_INFO("radeon: irq initialized.\n"); 326 return 0; 327 } 328 329 /** 330 * radeon_irq_kms_fini - tear down driver interrupt info 331 * 332 * @rdev: radeon device pointer 333 * 334 * Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics). 335 */ 336 void radeon_irq_kms_fini(struct radeon_device *rdev) 337 { 338 if (rdev->irq.installed) { 339 drm_irq_uninstall(rdev->ddev); 340 rdev->irq.installed = false; 341 if (rdev->msi_enabled) 342 pci_disable_msi(rdev->pdev); 343 flush_delayed_work(&rdev->hotplug_work); 344 } 345 } 346 347 /** 348 * radeon_irq_kms_sw_irq_get - enable software interrupt 349 * 350 * @rdev: radeon device pointer 351 * @ring: ring whose interrupt you want to enable 352 * 353 * Enables the software interrupt for a specific ring (all asics). 354 * The software interrupt is generally used to signal a fence on 355 * a particular ring. 356 */ 357 void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring) 358 { 359 unsigned long irqflags; 360 361 if (!rdev->ddev->irq_enabled) 362 return; 363 364 if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) { 365 spin_lock_irqsave(&rdev->irq.lock, irqflags); 366 radeon_irq_set(rdev); 367 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 368 } 369 } 370 371 /** 372 * radeon_irq_kms_sw_irq_get_delayed - enable software interrupt 373 * 374 * @rdev: radeon device pointer 375 * @ring: ring whose interrupt you want to enable 376 * 377 * Enables the software interrupt for a specific ring (all asics). 378 * The software interrupt is generally used to signal a fence on 379 * a particular ring. 380 */ 381 bool radeon_irq_kms_sw_irq_get_delayed(struct radeon_device *rdev, int ring) 382 { 383 return atomic_inc_return(&rdev->irq.ring_int[ring]) == 1; 384 } 385 386 /** 387 * radeon_irq_kms_sw_irq_put - disable software interrupt 388 * 389 * @rdev: radeon device pointer 390 * @ring: ring whose interrupt you want to disable 391 * 392 * Disables the software interrupt for a specific ring (all asics). 393 * The software interrupt is generally used to signal a fence on 394 * a particular ring. 395 */ 396 void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring) 397 { 398 unsigned long irqflags; 399 400 if (!rdev->ddev->irq_enabled) 401 return; 402 403 if (atomic_dec_and_test(&rdev->irq.ring_int[ring])) { 404 spin_lock_irqsave(&rdev->irq.lock, irqflags); 405 radeon_irq_set(rdev); 406 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 407 } 408 } 409 410 /** 411 * radeon_irq_kms_pflip_irq_get - enable pageflip interrupt 412 * 413 * @rdev: radeon device pointer 414 * @crtc: crtc whose interrupt you want to enable 415 * 416 * Enables the pageflip interrupt for a specific crtc (all asics). 417 * For pageflips we use the vblank interrupt source. 418 */ 419 void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc) 420 { 421 unsigned long irqflags; 422 423 if (crtc < 0 || crtc >= rdev->num_crtc) 424 return; 425 426 if (!rdev->ddev->irq_enabled) 427 return; 428 429 if (atomic_inc_return(&rdev->irq.pflip[crtc]) == 1) { 430 spin_lock_irqsave(&rdev->irq.lock, irqflags); 431 radeon_irq_set(rdev); 432 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 433 } 434 } 435 436 /** 437 * radeon_irq_kms_pflip_irq_put - disable pageflip interrupt 438 * 439 * @rdev: radeon device pointer 440 * @crtc: crtc whose interrupt you want to disable 441 * 442 * Disables the pageflip interrupt for a specific crtc (all asics). 443 * For pageflips we use the vblank interrupt source. 444 */ 445 void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc) 446 { 447 unsigned long irqflags; 448 449 if (crtc < 0 || crtc >= rdev->num_crtc) 450 return; 451 452 if (!rdev->ddev->irq_enabled) 453 return; 454 455 if (atomic_dec_and_test(&rdev->irq.pflip[crtc])) { 456 spin_lock_irqsave(&rdev->irq.lock, irqflags); 457 radeon_irq_set(rdev); 458 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 459 } 460 } 461 462 /** 463 * radeon_irq_kms_enable_afmt - enable audio format change interrupt 464 * 465 * @rdev: radeon device pointer 466 * @block: afmt block whose interrupt you want to enable 467 * 468 * Enables the afmt change interrupt for a specific afmt block (all asics). 469 */ 470 void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block) 471 { 472 unsigned long irqflags; 473 474 if (!rdev->ddev->irq_enabled) 475 return; 476 477 spin_lock_irqsave(&rdev->irq.lock, irqflags); 478 rdev->irq.afmt[block] = true; 479 radeon_irq_set(rdev); 480 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 481 482 } 483 484 /** 485 * radeon_irq_kms_disable_afmt - disable audio format change interrupt 486 * 487 * @rdev: radeon device pointer 488 * @block: afmt block whose interrupt you want to disable 489 * 490 * Disables the afmt change interrupt for a specific afmt block (all asics). 491 */ 492 void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block) 493 { 494 unsigned long irqflags; 495 496 if (!rdev->ddev->irq_enabled) 497 return; 498 499 spin_lock_irqsave(&rdev->irq.lock, irqflags); 500 rdev->irq.afmt[block] = false; 501 radeon_irq_set(rdev); 502 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 503 } 504 505 /** 506 * radeon_irq_kms_enable_hpd - enable hotplug detect interrupt 507 * 508 * @rdev: radeon device pointer 509 * @hpd_mask: mask of hpd pins you want to enable. 510 * 511 * Enables the hotplug detect interrupt for a specific hpd pin (all asics). 512 */ 513 void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask) 514 { 515 unsigned long irqflags; 516 int i; 517 518 if (!rdev->ddev->irq_enabled) 519 return; 520 521 spin_lock_irqsave(&rdev->irq.lock, irqflags); 522 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i) 523 rdev->irq.hpd[i] |= !!(hpd_mask & (1 << i)); 524 radeon_irq_set(rdev); 525 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 526 } 527 528 /** 529 * radeon_irq_kms_disable_hpd - disable hotplug detect interrupt 530 * 531 * @rdev: radeon device pointer 532 * @hpd_mask: mask of hpd pins you want to disable. 533 * 534 * Disables the hotplug detect interrupt for a specific hpd pin (all asics). 535 */ 536 void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask) 537 { 538 unsigned long irqflags; 539 int i; 540 541 if (!rdev->ddev->irq_enabled) 542 return; 543 544 spin_lock_irqsave(&rdev->irq.lock, irqflags); 545 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i) 546 rdev->irq.hpd[i] &= !(hpd_mask & (1 << i)); 547 radeon_irq_set(rdev); 548 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 549 } 550 551 /** 552 * radeon_irq_kms_update_int_n - helper for updating interrupt enable registers 553 * 554 * @rdev: radeon device pointer 555 * @reg: the register to write to enable/disable interrupts 556 * @mask: the mask that enables the interrupts 557 * @enable: whether to enable or disable the interrupt register 558 * @name: the name of the interrupt register to print to the kernel log 559 * @num: the number of the interrupt register to print to the kernel log 560 * 561 * Helper for updating the enable state of interrupt registers. Checks whether 562 * or not the interrupt matches the enable state we want. If it doesn't, then 563 * we update it and print a debugging message to the kernel log indicating the 564 * new state of the interrupt register. 565 * 566 * Used for updating sequences of interrupts registers like HPD1, HPD2, etc. 567 */ 568 void radeon_irq_kms_set_irq_n_enabled(struct radeon_device *rdev, 569 u32 reg, u32 mask, 570 bool enable, const char *name, unsigned n) 571 { 572 u32 tmp = RREG32(reg); 573 574 /* Interrupt state didn't change */ 575 if (!!(tmp & mask) == enable) 576 return; 577 578 if (enable) { 579 DRM_DEBUG("%s%d interrupts enabled\n", name, n); 580 WREG32(reg, tmp |= mask); 581 } else { 582 DRM_DEBUG("%s%d interrupts disabled\n", name, n); 583 WREG32(reg, tmp & ~mask); 584 } 585 } 586