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_crtc_helper.h> 33 #include <drm/drm_device.h> 34 #include <drm/drm_drv.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_kms.h" 42 #include "radeon_reg.h" 43 44 45 #define RADEON_WAIT_IDLE_TIMEOUT 200 46 47 /* 48 * radeon_driver_irq_handler_kms - irq handler for KMS 49 * 50 * This is the irq handler for the radeon KMS driver (all asics). 51 * radeon_irq_process is a macro that points to the per-asic 52 * irq handler callback. 53 */ 54 static irqreturn_t radeon_driver_irq_handler_kms(int irq, void *arg) 55 { 56 struct drm_device *dev = (struct drm_device *) arg; 57 struct radeon_device *rdev = dev->dev_private; 58 irqreturn_t ret; 59 60 ret = radeon_irq_process(rdev); 61 if (ret == IRQ_HANDLED) 62 pm_runtime_mark_last_busy(dev->dev); 63 return ret; 64 } 65 66 /* 67 * Handle hotplug events outside the interrupt handler proper. 68 */ 69 /** 70 * radeon_hotplug_work_func - display hotplug work handler 71 * 72 * @work: work struct 73 * 74 * This is the hot plug event work handler (all asics). 75 * The work gets scheduled from the irq handler if there 76 * was a hot plug interrupt. It walks the connector table 77 * and calls the hotplug handler for each one, then sends 78 * a drm hotplug event to alert userspace. 79 */ 80 static void radeon_hotplug_work_func(struct work_struct *work) 81 { 82 struct radeon_device *rdev = container_of(work, struct radeon_device, 83 hotplug_work.work); 84 struct drm_device *dev = rdev->ddev; 85 struct drm_mode_config *mode_config = &dev->mode_config; 86 struct drm_connector *connector; 87 88 /* we can race here at startup, some boards seem to trigger 89 * hotplug irqs when they shouldn't. */ 90 if (!rdev->mode_info.mode_config_initialized) 91 return; 92 93 mutex_lock(&mode_config->mutex); 94 list_for_each_entry(connector, &mode_config->connector_list, head) 95 radeon_connector_hotplug(connector); 96 mutex_unlock(&mode_config->mutex); 97 /* Just fire off a uevent and let userspace tell us what to do */ 98 drm_helper_hpd_irq_event(dev); 99 } 100 101 static void radeon_dp_work_func(struct work_struct *work) 102 { 103 } 104 105 /** 106 * radeon_driver_irq_preinstall_kms - drm irq preinstall callback 107 * 108 * @dev: drm dev pointer 109 * 110 * Gets the hw ready to enable irqs (all asics). 111 * This function disables all interrupt sources on the GPU. 112 */ 113 static void radeon_driver_irq_preinstall_kms(struct drm_device *dev) 114 { 115 struct radeon_device *rdev = dev->dev_private; 116 unsigned long irqflags; 117 unsigned i; 118 119 spin_lock_irqsave(&rdev->irq.lock, irqflags); 120 /* Disable *all* interrupts */ 121 for (i = 0; i < RADEON_NUM_RINGS; i++) 122 atomic_set(&rdev->irq.ring_int[i], 0); 123 rdev->irq.dpm_thermal = false; 124 for (i = 0; i < RADEON_MAX_HPD_PINS; i++) 125 rdev->irq.hpd[i] = false; 126 for (i = 0; i < RADEON_MAX_CRTCS; i++) { 127 rdev->irq.crtc_vblank_int[i] = false; 128 atomic_set(&rdev->irq.pflip[i], 0); 129 rdev->irq.afmt[i] = false; 130 } 131 radeon_irq_set(rdev); 132 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 133 /* Clear bits */ 134 radeon_irq_process(rdev); 135 } 136 137 /** 138 * radeon_driver_irq_postinstall_kms - drm irq preinstall callback 139 * 140 * @dev: drm dev pointer 141 * 142 * Handles stuff to be done after enabling irqs (all asics). 143 * Returns 0 on success. 144 */ 145 static int radeon_driver_irq_postinstall_kms(struct drm_device *dev) 146 { 147 struct radeon_device *rdev = dev->dev_private; 148 149 if (ASIC_IS_AVIVO(rdev)) 150 dev->max_vblank_count = 0x00ffffff; 151 else 152 dev->max_vblank_count = 0x001fffff; 153 154 return 0; 155 } 156 157 /** 158 * radeon_driver_irq_uninstall_kms - drm irq uninstall callback 159 * 160 * @dev: drm dev pointer 161 * 162 * This function disables all interrupt sources on the GPU (all asics). 163 */ 164 static void radeon_driver_irq_uninstall_kms(struct drm_device *dev) 165 { 166 struct radeon_device *rdev = dev->dev_private; 167 unsigned long irqflags; 168 unsigned i; 169 170 if (rdev == NULL) { 171 return; 172 } 173 spin_lock_irqsave(&rdev->irq.lock, irqflags); 174 /* Disable *all* interrupts */ 175 for (i = 0; i < RADEON_NUM_RINGS; i++) 176 atomic_set(&rdev->irq.ring_int[i], 0); 177 rdev->irq.dpm_thermal = false; 178 for (i = 0; i < RADEON_MAX_HPD_PINS; i++) 179 rdev->irq.hpd[i] = false; 180 for (i = 0; i < RADEON_MAX_CRTCS; i++) { 181 rdev->irq.crtc_vblank_int[i] = false; 182 atomic_set(&rdev->irq.pflip[i], 0); 183 rdev->irq.afmt[i] = false; 184 } 185 radeon_irq_set(rdev); 186 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 187 } 188 189 static int radeon_irq_install(struct radeon_device *rdev, int irq) 190 { 191 struct drm_device *dev = rdev->ddev; 192 int ret; 193 194 if (irq == IRQ_NOTCONNECTED) 195 return -ENOTCONN; 196 197 radeon_driver_irq_preinstall_kms(dev); 198 199 /* PCI devices require shared interrupts. */ 200 ret = request_irq(irq, radeon_driver_irq_handler_kms, 201 IRQF_SHARED, dev->driver->name, dev); 202 if (ret) 203 return ret; 204 205 radeon_driver_irq_postinstall_kms(dev); 206 207 return 0; 208 } 209 210 static void radeon_irq_uninstall(struct radeon_device *rdev) 211 { 212 struct drm_device *dev = rdev->ddev; 213 struct pci_dev *pdev = to_pci_dev(dev->dev); 214 215 radeon_driver_irq_uninstall_kms(dev); 216 free_irq(pdev->irq, dev); 217 } 218 219 /** 220 * radeon_msi_ok - asic specific msi checks 221 * 222 * @rdev: radeon device pointer 223 * 224 * Handles asic specific MSI checks to determine if 225 * MSIs should be enabled on a particular chip (all asics). 226 * Returns true if MSIs should be enabled, false if MSIs 227 * should not be enabled. 228 */ 229 static bool radeon_msi_ok(struct radeon_device *rdev) 230 { 231 /* RV370/RV380 was first asic with MSI support */ 232 if (rdev->family < CHIP_RV380) 233 return false; 234 235 /* MSIs don't work on AGP */ 236 if (rdev->flags & RADEON_IS_AGP) 237 return false; 238 239 /* 240 * Older chips have a HW limitation, they can only generate 40 bits 241 * of address for "64-bit" MSIs which breaks on some platforms, notably 242 * IBM POWER servers, so we limit them 243 */ 244 if (rdev->family < CHIP_BONAIRE) { 245 dev_info(rdev->dev, "radeon: MSI limited to 32-bit\n"); 246 rdev->pdev->no_64bit_msi = 1; 247 } 248 249 /* force MSI on */ 250 if (radeon_msi == 1) 251 return true; 252 else if (radeon_msi == 0) 253 return false; 254 255 /* Quirks */ 256 /* HP RS690 only seems to work with MSIs. */ 257 if ((rdev->pdev->device == 0x791f) && 258 (rdev->pdev->subsystem_vendor == 0x103c) && 259 (rdev->pdev->subsystem_device == 0x30c2)) 260 return true; 261 262 /* Dell RS690 only seems to work with MSIs. */ 263 if ((rdev->pdev->device == 0x791f) && 264 (rdev->pdev->subsystem_vendor == 0x1028) && 265 (rdev->pdev->subsystem_device == 0x01fc)) 266 return true; 267 268 /* Dell RS690 only seems to work with MSIs. */ 269 if ((rdev->pdev->device == 0x791f) && 270 (rdev->pdev->subsystem_vendor == 0x1028) && 271 (rdev->pdev->subsystem_device == 0x01fd)) 272 return true; 273 274 /* Gateway RS690 only seems to work with MSIs. */ 275 if ((rdev->pdev->device == 0x791f) && 276 (rdev->pdev->subsystem_vendor == 0x107b) && 277 (rdev->pdev->subsystem_device == 0x0185)) 278 return true; 279 280 /* try and enable MSIs by default on all RS690s */ 281 if (rdev->family == CHIP_RS690) 282 return true; 283 284 /* RV515 seems to have MSI issues where it loses 285 * MSI rearms occasionally. This leads to lockups and freezes. 286 * disable it by default. 287 */ 288 if (rdev->family == CHIP_RV515) 289 return false; 290 if (rdev->flags & RADEON_IS_IGP) { 291 /* APUs work fine with MSIs */ 292 if (rdev->family >= CHIP_PALM) 293 return true; 294 /* lots of IGPs have problems with MSIs */ 295 return false; 296 } 297 298 return true; 299 } 300 301 /** 302 * radeon_irq_kms_init - init driver interrupt info 303 * 304 * @rdev: radeon device pointer 305 * 306 * Sets up the work irq handlers, vblank init, MSIs, etc. (all asics). 307 * Returns 0 for success, error for failure. 308 */ 309 int radeon_irq_kms_init(struct radeon_device *rdev) 310 { 311 int r = 0; 312 313 spin_lock_init(&rdev->irq.lock); 314 315 /* Disable vblank irqs aggressively for power-saving */ 316 rdev->ddev->vblank_disable_immediate = true; 317 318 r = drm_vblank_init(rdev->ddev, rdev->num_crtc); 319 if (r) { 320 return r; 321 } 322 323 /* enable msi */ 324 rdev->msi_enabled = 0; 325 326 if (radeon_msi_ok(rdev)) { 327 int ret = pci_enable_msi(rdev->pdev); 328 if (!ret) { 329 rdev->msi_enabled = 1; 330 dev_info(rdev->dev, "radeon: using MSI.\n"); 331 } 332 } 333 334 INIT_DELAYED_WORK(&rdev->hotplug_work, radeon_hotplug_work_func); 335 INIT_WORK(&rdev->dp_work, radeon_dp_work_func); 336 INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi); 337 338 rdev->irq.installed = true; 339 r = radeon_irq_install(rdev, rdev->pdev->irq); 340 if (r) { 341 rdev->irq.installed = false; 342 flush_delayed_work(&rdev->hotplug_work); 343 return r; 344 } 345 346 DRM_INFO("radeon: irq initialized.\n"); 347 return 0; 348 } 349 350 /** 351 * radeon_irq_kms_fini - tear down driver interrupt info 352 * 353 * @rdev: radeon device pointer 354 * 355 * Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics). 356 */ 357 void radeon_irq_kms_fini(struct radeon_device *rdev) 358 { 359 if (rdev->irq.installed) { 360 radeon_irq_uninstall(rdev); 361 rdev->irq.installed = false; 362 if (rdev->msi_enabled) 363 pci_disable_msi(rdev->pdev); 364 flush_delayed_work(&rdev->hotplug_work); 365 } 366 } 367 368 /** 369 * radeon_irq_kms_sw_irq_get - enable software interrupt 370 * 371 * @rdev: radeon device pointer 372 * @ring: ring whose interrupt you want to enable 373 * 374 * Enables the software interrupt for a specific ring (all asics). 375 * The software interrupt is generally used to signal a fence on 376 * a particular ring. 377 */ 378 void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring) 379 { 380 unsigned long irqflags; 381 382 if (!rdev->irq.installed) 383 return; 384 385 if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) { 386 spin_lock_irqsave(&rdev->irq.lock, irqflags); 387 radeon_irq_set(rdev); 388 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 389 } 390 } 391 392 /** 393 * radeon_irq_kms_sw_irq_get_delayed - enable software interrupt 394 * 395 * @rdev: radeon device pointer 396 * @ring: ring whose interrupt you want to enable 397 * 398 * Enables the software interrupt for a specific ring (all asics). 399 * The software interrupt is generally used to signal a fence on 400 * a particular ring. 401 */ 402 bool radeon_irq_kms_sw_irq_get_delayed(struct radeon_device *rdev, int ring) 403 { 404 return atomic_inc_return(&rdev->irq.ring_int[ring]) == 1; 405 } 406 407 /** 408 * radeon_irq_kms_sw_irq_put - disable software interrupt 409 * 410 * @rdev: radeon device pointer 411 * @ring: ring whose interrupt you want to disable 412 * 413 * Disables the software interrupt for a specific ring (all asics). 414 * The software interrupt is generally used to signal a fence on 415 * a particular ring. 416 */ 417 void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring) 418 { 419 unsigned long irqflags; 420 421 if (!rdev->irq.installed) 422 return; 423 424 if (atomic_dec_and_test(&rdev->irq.ring_int[ring])) { 425 spin_lock_irqsave(&rdev->irq.lock, irqflags); 426 radeon_irq_set(rdev); 427 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 428 } 429 } 430 431 /** 432 * radeon_irq_kms_pflip_irq_get - enable pageflip interrupt 433 * 434 * @rdev: radeon device pointer 435 * @crtc: crtc whose interrupt you want to enable 436 * 437 * Enables the pageflip interrupt for a specific crtc (all asics). 438 * For pageflips we use the vblank interrupt source. 439 */ 440 void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc) 441 { 442 unsigned long irqflags; 443 444 if (crtc < 0 || crtc >= rdev->num_crtc) 445 return; 446 447 if (!rdev->irq.installed) 448 return; 449 450 if (atomic_inc_return(&rdev->irq.pflip[crtc]) == 1) { 451 spin_lock_irqsave(&rdev->irq.lock, irqflags); 452 radeon_irq_set(rdev); 453 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 454 } 455 } 456 457 /** 458 * radeon_irq_kms_pflip_irq_put - disable pageflip interrupt 459 * 460 * @rdev: radeon device pointer 461 * @crtc: crtc whose interrupt you want to disable 462 * 463 * Disables the pageflip interrupt for a specific crtc (all asics). 464 * For pageflips we use the vblank interrupt source. 465 */ 466 void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc) 467 { 468 unsigned long irqflags; 469 470 if (crtc < 0 || crtc >= rdev->num_crtc) 471 return; 472 473 if (!rdev->irq.installed) 474 return; 475 476 if (atomic_dec_and_test(&rdev->irq.pflip[crtc])) { 477 spin_lock_irqsave(&rdev->irq.lock, irqflags); 478 radeon_irq_set(rdev); 479 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 480 } 481 } 482 483 /** 484 * radeon_irq_kms_enable_afmt - enable audio format change interrupt 485 * 486 * @rdev: radeon device pointer 487 * @block: afmt block whose interrupt you want to enable 488 * 489 * Enables the afmt change interrupt for a specific afmt block (all asics). 490 */ 491 void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block) 492 { 493 unsigned long irqflags; 494 495 if (!rdev->irq.installed) 496 return; 497 498 spin_lock_irqsave(&rdev->irq.lock, irqflags); 499 rdev->irq.afmt[block] = true; 500 radeon_irq_set(rdev); 501 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 502 503 } 504 505 /** 506 * radeon_irq_kms_disable_afmt - disable audio format change interrupt 507 * 508 * @rdev: radeon device pointer 509 * @block: afmt block whose interrupt you want to disable 510 * 511 * Disables the afmt change interrupt for a specific afmt block (all asics). 512 */ 513 void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block) 514 { 515 unsigned long irqflags; 516 517 if (!rdev->irq.installed) 518 return; 519 520 spin_lock_irqsave(&rdev->irq.lock, irqflags); 521 rdev->irq.afmt[block] = false; 522 radeon_irq_set(rdev); 523 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 524 } 525 526 /** 527 * radeon_irq_kms_enable_hpd - enable hotplug detect interrupt 528 * 529 * @rdev: radeon device pointer 530 * @hpd_mask: mask of hpd pins you want to enable. 531 * 532 * Enables the hotplug detect interrupt for a specific hpd pin (all asics). 533 */ 534 void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask) 535 { 536 unsigned long irqflags; 537 int i; 538 539 if (!rdev->irq.installed) 540 return; 541 542 spin_lock_irqsave(&rdev->irq.lock, irqflags); 543 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i) 544 rdev->irq.hpd[i] |= !!(hpd_mask & (1 << i)); 545 radeon_irq_set(rdev); 546 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 547 } 548 549 /** 550 * radeon_irq_kms_disable_hpd - disable hotplug detect interrupt 551 * 552 * @rdev: radeon device pointer 553 * @hpd_mask: mask of hpd pins you want to disable. 554 * 555 * Disables the hotplug detect interrupt for a specific hpd pin (all asics). 556 */ 557 void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask) 558 { 559 unsigned long irqflags; 560 int i; 561 562 if (!rdev->irq.installed) 563 return; 564 565 spin_lock_irqsave(&rdev->irq.lock, irqflags); 566 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i) 567 rdev->irq.hpd[i] &= !(hpd_mask & (1 << i)); 568 radeon_irq_set(rdev); 569 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 570 } 571 572 /** 573 * radeon_irq_kms_set_irq_n_enabled - helper for updating interrupt enable registers 574 * 575 * @rdev: radeon device pointer 576 * @reg: the register to write to enable/disable interrupts 577 * @mask: the mask that enables the interrupts 578 * @enable: whether to enable or disable the interrupt register 579 * @name: the name of the interrupt register to print to the kernel log 580 * @n: the number of the interrupt register to print to the kernel log 581 * 582 * Helper for updating the enable state of interrupt registers. Checks whether 583 * or not the interrupt matches the enable state we want. If it doesn't, then 584 * we update it and print a debugging message to the kernel log indicating the 585 * new state of the interrupt register. 586 * 587 * Used for updating sequences of interrupts registers like HPD1, HPD2, etc. 588 */ 589 void radeon_irq_kms_set_irq_n_enabled(struct radeon_device *rdev, 590 u32 reg, u32 mask, 591 bool enable, const char *name, unsigned n) 592 { 593 u32 tmp = RREG32(reg); 594 595 /* Interrupt state didn't change */ 596 if (!!(tmp & mask) == enable) 597 return; 598 599 if (enable) { 600 DRM_DEBUG("%s%d interrupts enabled\n", name, n); 601 WREG32(reg, tmp |= mask); 602 } else { 603 DRM_DEBUG("%s%d interrupts disabled\n", name, n); 604 WREG32(reg, tmp & ~mask); 605 } 606 } 607