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