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/pci.h> 30 #include <linux/pm_runtime.h> 31 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> 37 38 #include "atom.h" 39 #include "radeon.h" 40 #include "radeon_kms.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 * 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. 52 */ 53 static irqreturn_t radeon_driver_irq_handler_kms(int irq, void *arg) 54 { 55 struct drm_device *dev = (struct drm_device *) arg; 56 struct radeon_device *rdev = dev->dev_private; 57 irqreturn_t ret; 58 59 ret = radeon_irq_process(rdev); 60 if (ret == IRQ_HANDLED) 61 pm_runtime_mark_last_busy(dev->dev); 62 return ret; 63 } 64 65 /* 66 * Handle hotplug events outside the interrupt handler proper. 67 */ 68 /** 69 * radeon_hotplug_work_func - display hotplug work handler 70 * 71 * @work: work struct 72 * 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. 78 */ 79 static void radeon_hotplug_work_func(struct work_struct *work) 80 { 81 struct radeon_device *rdev = container_of(work, struct radeon_device, 82 hotplug_work.work); 83 struct drm_device *dev = rdev->ddev; 84 struct drm_mode_config *mode_config = &dev->mode_config; 85 struct drm_connector *connector; 86 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) 90 return; 91 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); 98 } 99 100 static void radeon_dp_work_func(struct work_struct *work) 101 { 102 struct radeon_device *rdev = container_of(work, struct radeon_device, 103 dp_work); 104 struct drm_device *dev = rdev->ddev; 105 struct drm_mode_config *mode_config = &dev->mode_config; 106 struct drm_connector *connector; 107 108 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); 112 } 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 static 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 static 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 static 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 static int radeon_irq_install(struct radeon_device *rdev, int irq) 199 { 200 struct drm_device *dev = rdev->ddev; 201 int ret; 202 203 if (irq == IRQ_NOTCONNECTED) 204 return -ENOTCONN; 205 206 radeon_driver_irq_preinstall_kms(dev); 207 208 /* PCI devices require shared interrupts. */ 209 ret = request_irq(irq, radeon_driver_irq_handler_kms, 210 IRQF_SHARED, dev->driver->name, dev); 211 if (ret) 212 return ret; 213 214 radeon_driver_irq_postinstall_kms(dev); 215 216 return 0; 217 } 218 219 static void radeon_irq_uninstall(struct radeon_device *rdev) 220 { 221 struct drm_device *dev = rdev->ddev; 222 struct pci_dev *pdev = to_pci_dev(dev->dev); 223 224 radeon_driver_irq_uninstall_kms(dev); 225 free_irq(pdev->irq, dev); 226 } 227 228 /** 229 * radeon_msi_ok - asic specific msi checks 230 * 231 * @rdev: radeon device pointer 232 * 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. 237 */ 238 static bool radeon_msi_ok(struct radeon_device *rdev) 239 { 240 /* RV370/RV380 was first asic with MSI support */ 241 if (rdev->family < CHIP_RV380) 242 return false; 243 244 /* MSIs don't work on AGP */ 245 if (rdev->flags & RADEON_IS_AGP) 246 return false; 247 248 /* 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 252 */ 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; 256 } 257 258 /* force MSI on */ 259 if (radeon_msi == 1) 260 return true; 261 else if (radeon_msi == 0) 262 return false; 263 264 /* Quirks */ 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)) 269 return true; 270 271 /* 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)) 275 return true; 276 277 /* 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)) 281 return true; 282 283 /* 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)) 287 return true; 288 289 /* try and enable MSIs by default on all RS690s */ 290 if (rdev->family == CHIP_RS690) 291 return true; 292 293 /* RV515 seems to have MSI issues where it loses 294 * MSI rearms occasionally. This leads to lockups and freezes. 295 * disable it by default. 296 */ 297 if (rdev->family == CHIP_RV515) 298 return false; 299 if (rdev->flags & RADEON_IS_IGP) { 300 /* APUs work fine with MSIs */ 301 if (rdev->family >= CHIP_PALM) 302 return true; 303 /* lots of IGPs have problems with MSIs */ 304 return false; 305 } 306 307 return true; 308 } 309 310 /** 311 * radeon_irq_kms_init - init driver interrupt info 312 * 313 * @rdev: radeon device pointer 314 * 315 * Sets up the work irq handlers, vblank init, MSIs, etc. (all asics). 316 * Returns 0 for success, error for failure. 317 */ 318 int radeon_irq_kms_init(struct radeon_device *rdev) 319 { 320 int r = 0; 321 322 spin_lock_init(&rdev->irq.lock); 323 324 /* Disable vblank irqs aggressively for power-saving */ 325 rdev->ddev->vblank_disable_immediate = true; 326 327 r = drm_vblank_init(rdev->ddev, rdev->num_crtc); 328 if (r) { 329 return r; 330 } 331 332 /* enable msi */ 333 rdev->msi_enabled = 0; 334 335 if (radeon_msi_ok(rdev)) { 336 int ret = pci_enable_msi(rdev->pdev); 337 if (!ret) { 338 rdev->msi_enabled = 1; 339 dev_info(rdev->dev, "radeon: using MSI.\n"); 340 } 341 } 342 343 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); 346 347 rdev->irq.installed = true; 348 r = radeon_irq_install(rdev, rdev->pdev->irq); 349 if (r) { 350 rdev->irq.installed = false; 351 flush_delayed_work(&rdev->hotplug_work); 352 return r; 353 } 354 355 DRM_INFO("radeon: irq initialized.\n"); 356 return 0; 357 } 358 359 /** 360 * radeon_irq_kms_fini - tear down driver interrupt info 361 * 362 * @rdev: radeon device pointer 363 * 364 * Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics). 365 */ 366 void radeon_irq_kms_fini(struct radeon_device *rdev) 367 { 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); 374 } 375 } 376 377 /** 378 * radeon_irq_kms_sw_irq_get - enable software interrupt 379 * 380 * @rdev: radeon device pointer 381 * @ring: ring whose interrupt you want to enable 382 * 383 * Enables the software interrupt for a specific ring (all asics). 384 * The software interrupt is generally used to signal a fence on 385 * a particular ring. 386 */ 387 void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring) 388 { 389 unsigned long irqflags; 390 391 if (!rdev->irq.installed) 392 return; 393 394 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); 398 } 399 } 400 401 /** 402 * radeon_irq_kms_sw_irq_get_delayed - enable software interrupt 403 * 404 * @rdev: radeon device pointer 405 * @ring: ring whose interrupt you want to enable 406 * 407 * Enables the software interrupt for a specific ring (all asics). 408 * The software interrupt is generally used to signal a fence on 409 * a particular ring. 410 */ 411 bool radeon_irq_kms_sw_irq_get_delayed(struct radeon_device *rdev, int ring) 412 { 413 return atomic_inc_return(&rdev->irq.ring_int[ring]) == 1; 414 } 415 416 /** 417 * radeon_irq_kms_sw_irq_put - disable software interrupt 418 * 419 * @rdev: radeon device pointer 420 * @ring: ring whose interrupt you want to disable 421 * 422 * Disables the software interrupt for a specific ring (all asics). 423 * The software interrupt is generally used to signal a fence on 424 * a particular ring. 425 */ 426 void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring) 427 { 428 unsigned long irqflags; 429 430 if (!rdev->irq.installed) 431 return; 432 433 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); 437 } 438 } 439 440 /** 441 * radeon_irq_kms_pflip_irq_get - enable pageflip interrupt 442 * 443 * @rdev: radeon device pointer 444 * @crtc: crtc whose interrupt you want to enable 445 * 446 * Enables the pageflip interrupt for a specific crtc (all asics). 447 * For pageflips we use the vblank interrupt source. 448 */ 449 void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc) 450 { 451 unsigned long irqflags; 452 453 if (crtc < 0 || crtc >= rdev->num_crtc) 454 return; 455 456 if (!rdev->irq.installed) 457 return; 458 459 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); 463 } 464 } 465 466 /** 467 * radeon_irq_kms_pflip_irq_put - disable pageflip interrupt 468 * 469 * @rdev: radeon device pointer 470 * @crtc: crtc whose interrupt you want to disable 471 * 472 * Disables the pageflip interrupt for a specific crtc (all asics). 473 * For pageflips we use the vblank interrupt source. 474 */ 475 void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc) 476 { 477 unsigned long irqflags; 478 479 if (crtc < 0 || crtc >= rdev->num_crtc) 480 return; 481 482 if (!rdev->irq.installed) 483 return; 484 485 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); 489 } 490 } 491 492 /** 493 * radeon_irq_kms_enable_afmt - enable audio format change interrupt 494 * 495 * @rdev: radeon device pointer 496 * @block: afmt block whose interrupt you want to enable 497 * 498 * Enables the afmt change interrupt for a specific afmt block (all asics). 499 */ 500 void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block) 501 { 502 unsigned long irqflags; 503 504 if (!rdev->irq.installed) 505 return; 506 507 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); 511 512 } 513 514 /** 515 * radeon_irq_kms_disable_afmt - disable audio format change interrupt 516 * 517 * @rdev: radeon device pointer 518 * @block: afmt block whose interrupt you want to disable 519 * 520 * Disables the afmt change interrupt for a specific afmt block (all asics). 521 */ 522 void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block) 523 { 524 unsigned long irqflags; 525 526 if (!rdev->irq.installed) 527 return; 528 529 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); 533 } 534 535 /** 536 * radeon_irq_kms_enable_hpd - enable hotplug detect interrupt 537 * 538 * @rdev: radeon device pointer 539 * @hpd_mask: mask of hpd pins you want to enable. 540 * 541 * Enables the hotplug detect interrupt for a specific hpd pin (all asics). 542 */ 543 void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask) 544 { 545 unsigned long irqflags; 546 int i; 547 548 if (!rdev->irq.installed) 549 return; 550 551 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); 556 } 557 558 /** 559 * radeon_irq_kms_disable_hpd - disable hotplug detect interrupt 560 * 561 * @rdev: radeon device pointer 562 * @hpd_mask: mask of hpd pins you want to disable. 563 * 564 * Disables the hotplug detect interrupt for a specific hpd pin (all asics). 565 */ 566 void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask) 567 { 568 unsigned long irqflags; 569 int i; 570 571 if (!rdev->irq.installed) 572 return; 573 574 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); 579 } 580 581 /** 582 * radeon_irq_kms_set_irq_n_enabled - helper for updating interrupt enable registers 583 * 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 590 * 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. 595 * 596 * Used for updating sequences of interrupts registers like HPD1, HPD2, etc. 597 */ 598 void radeon_irq_kms_set_irq_n_enabled(struct radeon_device *rdev, 599 u32 reg, u32 mask, 600 bool enable, const char *name, unsigned n) 601 { 602 u32 tmp = RREG32(reg); 603 604 /* Interrupt state didn't change */ 605 if (!!(tmp & mask) == enable) 606 return; 607 608 if (enable) { 609 DRM_DEBUG("%s%d interrupts enabled\n", name, n); 610 WREG32(reg, tmp |= mask); 611 } else { 612 DRM_DEBUG("%s%d interrupts disabled\n", name, n); 613 WREG32(reg, tmp & ~mask); 614 } 615 } 616