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/drm_probe_helper.h> 31 #include <drm/radeon_drm.h> 32 #include "radeon_reg.h" 33 #include "radeon.h" 34 #include "atom.h" 35 36 #include <linux/pm_runtime.h> 37 38 #define RADEON_WAIT_IDLE_TIMEOUT 200 39 40 /** 41 * radeon_driver_irq_handler_kms - irq handler for KMS 42 * 43 * @int irq, void *arg: args 44 * 45 * This is the irq handler for the radeon KMS driver (all asics). 46 * radeon_irq_process is a macro that points to the per-asic 47 * irq handler callback. 48 */ 49 irqreturn_t radeon_driver_irq_handler_kms(int irq, void *arg) 50 { 51 struct drm_device *dev = (struct drm_device *) arg; 52 struct radeon_device *rdev = dev->dev_private; 53 irqreturn_t ret; 54 55 ret = radeon_irq_process(rdev); 56 if (ret == IRQ_HANDLED) 57 pm_runtime_mark_last_busy(dev->dev); 58 return ret; 59 } 60 61 /* 62 * Handle hotplug events outside the interrupt handler proper. 63 */ 64 /** 65 * radeon_hotplug_work_func - display hotplug work handler 66 * 67 * @work: work struct 68 * 69 * This is the hot plug event work handler (all asics). 70 * The work gets scheduled from the irq handler if there 71 * was a hot plug interrupt. It walks the connector table 72 * and calls the hotplug handler for each one, then sends 73 * a drm hotplug event to alert userspace. 74 */ 75 static void radeon_hotplug_work_func(struct work_struct *work) 76 { 77 struct radeon_device *rdev = container_of(work, struct radeon_device, 78 hotplug_work.work); 79 struct drm_device *dev = rdev->ddev; 80 struct drm_mode_config *mode_config = &dev->mode_config; 81 struct drm_connector *connector; 82 83 /* we can race here at startup, some boards seem to trigger 84 * hotplug irqs when they shouldn't. */ 85 if (!rdev->mode_info.mode_config_initialized) 86 return; 87 88 mutex_lock(&mode_config->mutex); 89 list_for_each_entry(connector, &mode_config->connector_list, head) 90 radeon_connector_hotplug(connector); 91 mutex_unlock(&mode_config->mutex); 92 /* Just fire off a uevent and let userspace tell us what to do */ 93 drm_helper_hpd_irq_event(dev); 94 } 95 96 static void radeon_dp_work_func(struct work_struct *work) 97 { 98 struct radeon_device *rdev = container_of(work, struct radeon_device, 99 dp_work); 100 struct drm_device *dev = rdev->ddev; 101 struct drm_mode_config *mode_config = &dev->mode_config; 102 struct drm_connector *connector; 103 104 /* this should take a mutex */ 105 list_for_each_entry(connector, &mode_config->connector_list, head) 106 radeon_connector_hotplug(connector); 107 } 108 /** 109 * radeon_driver_irq_preinstall_kms - drm irq preinstall callback 110 * 111 * @dev: drm dev pointer 112 * 113 * Gets the hw ready to enable irqs (all asics). 114 * This function disables all interrupt sources on the GPU. 115 */ 116 void radeon_driver_irq_preinstall_kms(struct drm_device *dev) 117 { 118 struct radeon_device *rdev = dev->dev_private; 119 unsigned long irqflags; 120 unsigned i; 121 122 spin_lock_irqsave(&rdev->irq.lock, irqflags); 123 /* Disable *all* interrupts */ 124 for (i = 0; i < RADEON_NUM_RINGS; i++) 125 atomic_set(&rdev->irq.ring_int[i], 0); 126 rdev->irq.dpm_thermal = false; 127 for (i = 0; i < RADEON_MAX_HPD_PINS; i++) 128 rdev->irq.hpd[i] = false; 129 for (i = 0; i < RADEON_MAX_CRTCS; i++) { 130 rdev->irq.crtc_vblank_int[i] = false; 131 atomic_set(&rdev->irq.pflip[i], 0); 132 rdev->irq.afmt[i] = false; 133 } 134 radeon_irq_set(rdev); 135 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 136 /* Clear bits */ 137 radeon_irq_process(rdev); 138 } 139 140 /** 141 * radeon_driver_irq_postinstall_kms - drm irq preinstall callback 142 * 143 * @dev: drm dev pointer 144 * 145 * Handles stuff to be done after enabling irqs (all asics). 146 * Returns 0 on success. 147 */ 148 int radeon_driver_irq_postinstall_kms(struct drm_device *dev) 149 { 150 struct radeon_device *rdev = dev->dev_private; 151 152 if (ASIC_IS_AVIVO(rdev)) 153 dev->max_vblank_count = 0x00ffffff; 154 else 155 dev->max_vblank_count = 0x001fffff; 156 157 return 0; 158 } 159 160 /** 161 * radeon_driver_irq_uninstall_kms - drm irq uninstall callback 162 * 163 * @dev: drm dev pointer 164 * 165 * This function disables all interrupt sources on the GPU (all asics). 166 */ 167 void radeon_driver_irq_uninstall_kms(struct drm_device *dev) 168 { 169 struct radeon_device *rdev = dev->dev_private; 170 unsigned long irqflags; 171 unsigned i; 172 173 if (rdev == NULL) { 174 return; 175 } 176 spin_lock_irqsave(&rdev->irq.lock, irqflags); 177 /* Disable *all* interrupts */ 178 for (i = 0; i < RADEON_NUM_RINGS; i++) 179 atomic_set(&rdev->irq.ring_int[i], 0); 180 rdev->irq.dpm_thermal = false; 181 for (i = 0; i < RADEON_MAX_HPD_PINS; i++) 182 rdev->irq.hpd[i] = false; 183 for (i = 0; i < RADEON_MAX_CRTCS; i++) { 184 rdev->irq.crtc_vblank_int[i] = false; 185 atomic_set(&rdev->irq.pflip[i], 0); 186 rdev->irq.afmt[i] = false; 187 } 188 radeon_irq_set(rdev); 189 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 190 } 191 192 /** 193 * radeon_msi_ok - asic specific msi checks 194 * 195 * @rdev: radeon device pointer 196 * 197 * Handles asic specific MSI checks to determine if 198 * MSIs should be enabled on a particular chip (all asics). 199 * Returns true if MSIs should be enabled, false if MSIs 200 * should not be enabled. 201 */ 202 static bool radeon_msi_ok(struct radeon_device *rdev) 203 { 204 /* RV370/RV380 was first asic with MSI support */ 205 if (rdev->family < CHIP_RV380) 206 return false; 207 208 /* MSIs don't work on AGP */ 209 if (rdev->flags & RADEON_IS_AGP) 210 return false; 211 212 /* 213 * Older chips have a HW limitation, they can only generate 40 bits 214 * of address for "64-bit" MSIs which breaks on some platforms, notably 215 * IBM POWER servers, so we limit them 216 */ 217 if (rdev->family < CHIP_BONAIRE) { 218 dev_info(rdev->dev, "radeon: MSI limited to 32-bit\n"); 219 rdev->pdev->no_64bit_msi = 1; 220 } 221 222 /* force MSI on */ 223 if (radeon_msi == 1) 224 return true; 225 else if (radeon_msi == 0) 226 return false; 227 228 /* Quirks */ 229 /* HP RS690 only seems to work with MSIs. */ 230 if ((rdev->pdev->device == 0x791f) && 231 (rdev->pdev->subsystem_vendor == 0x103c) && 232 (rdev->pdev->subsystem_device == 0x30c2)) 233 return true; 234 235 /* Dell RS690 only seems to work with MSIs. */ 236 if ((rdev->pdev->device == 0x791f) && 237 (rdev->pdev->subsystem_vendor == 0x1028) && 238 (rdev->pdev->subsystem_device == 0x01fc)) 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 == 0x01fd)) 245 return true; 246 247 /* Gateway RS690 only seems to work with MSIs. */ 248 if ((rdev->pdev->device == 0x791f) && 249 (rdev->pdev->subsystem_vendor == 0x107b) && 250 (rdev->pdev->subsystem_device == 0x0185)) 251 return true; 252 253 /* try and enable MSIs by default on all RS690s */ 254 if (rdev->family == CHIP_RS690) 255 return true; 256 257 /* RV515 seems to have MSI issues where it loses 258 * MSI rearms occasionally. This leads to lockups and freezes. 259 * disable it by default. 260 */ 261 if (rdev->family == CHIP_RV515) 262 return false; 263 if (rdev->flags & RADEON_IS_IGP) { 264 /* APUs work fine with MSIs */ 265 if (rdev->family >= CHIP_PALM) 266 return true; 267 /* lots of IGPs have problems with MSIs */ 268 return false; 269 } 270 271 return true; 272 } 273 274 /** 275 * radeon_irq_kms_init - init driver interrupt info 276 * 277 * @rdev: radeon device pointer 278 * 279 * Sets up the work irq handlers, vblank init, MSIs, etc. (all asics). 280 * Returns 0 for success, error for failure. 281 */ 282 int radeon_irq_kms_init(struct radeon_device *rdev) 283 { 284 int r = 0; 285 286 spin_lock_init(&rdev->irq.lock); 287 288 /* Disable vblank irqs aggressively for power-saving */ 289 rdev->ddev->vblank_disable_immediate = true; 290 291 r = drm_vblank_init(rdev->ddev, rdev->num_crtc); 292 if (r) { 293 return r; 294 } 295 296 /* enable msi */ 297 rdev->msi_enabled = 0; 298 299 if (radeon_msi_ok(rdev)) { 300 int ret = pci_enable_msi(rdev->pdev); 301 if (!ret) { 302 rdev->msi_enabled = 1; 303 dev_info(rdev->dev, "radeon: using MSI.\n"); 304 } 305 } 306 307 INIT_DELAYED_WORK(&rdev->hotplug_work, radeon_hotplug_work_func); 308 INIT_WORK(&rdev->dp_work, radeon_dp_work_func); 309 INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi); 310 311 rdev->irq.installed = true; 312 r = drm_irq_install(rdev->ddev, rdev->ddev->pdev->irq); 313 if (r) { 314 rdev->irq.installed = false; 315 flush_delayed_work(&rdev->hotplug_work); 316 return r; 317 } 318 319 DRM_INFO("radeon: irq initialized.\n"); 320 return 0; 321 } 322 323 /** 324 * radeon_irq_kms_fini - tear down driver interrupt info 325 * 326 * @rdev: radeon device pointer 327 * 328 * Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics). 329 */ 330 void radeon_irq_kms_fini(struct radeon_device *rdev) 331 { 332 if (rdev->irq.installed) { 333 drm_irq_uninstall(rdev->ddev); 334 rdev->irq.installed = false; 335 if (rdev->msi_enabled) 336 pci_disable_msi(rdev->pdev); 337 flush_delayed_work(&rdev->hotplug_work); 338 } 339 } 340 341 /** 342 * radeon_irq_kms_sw_irq_get - enable software interrupt 343 * 344 * @rdev: radeon device pointer 345 * @ring: ring whose interrupt you want to enable 346 * 347 * Enables the software interrupt for a specific ring (all asics). 348 * The software interrupt is generally used to signal a fence on 349 * a particular ring. 350 */ 351 void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring) 352 { 353 unsigned long irqflags; 354 355 if (!rdev->ddev->irq_enabled) 356 return; 357 358 if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) { 359 spin_lock_irqsave(&rdev->irq.lock, irqflags); 360 radeon_irq_set(rdev); 361 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 362 } 363 } 364 365 /** 366 * radeon_irq_kms_sw_irq_get_delayed - enable software interrupt 367 * 368 * @rdev: radeon device pointer 369 * @ring: ring whose interrupt you want to enable 370 * 371 * Enables the software interrupt for a specific ring (all asics). 372 * The software interrupt is generally used to signal a fence on 373 * a particular ring. 374 */ 375 bool radeon_irq_kms_sw_irq_get_delayed(struct radeon_device *rdev, int ring) 376 { 377 return atomic_inc_return(&rdev->irq.ring_int[ring]) == 1; 378 } 379 380 /** 381 * radeon_irq_kms_sw_irq_put - disable software interrupt 382 * 383 * @rdev: radeon device pointer 384 * @ring: ring whose interrupt you want to disable 385 * 386 * Disables the software interrupt for a specific ring (all asics). 387 * The software interrupt is generally used to signal a fence on 388 * a particular ring. 389 */ 390 void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring) 391 { 392 unsigned long irqflags; 393 394 if (!rdev->ddev->irq_enabled) 395 return; 396 397 if (atomic_dec_and_test(&rdev->irq.ring_int[ring])) { 398 spin_lock_irqsave(&rdev->irq.lock, irqflags); 399 radeon_irq_set(rdev); 400 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 401 } 402 } 403 404 /** 405 * radeon_irq_kms_pflip_irq_get - enable pageflip interrupt 406 * 407 * @rdev: radeon device pointer 408 * @crtc: crtc whose interrupt you want to enable 409 * 410 * Enables the pageflip interrupt for a specific crtc (all asics). 411 * For pageflips we use the vblank interrupt source. 412 */ 413 void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc) 414 { 415 unsigned long irqflags; 416 417 if (crtc < 0 || crtc >= rdev->num_crtc) 418 return; 419 420 if (!rdev->ddev->irq_enabled) 421 return; 422 423 if (atomic_inc_return(&rdev->irq.pflip[crtc]) == 1) { 424 spin_lock_irqsave(&rdev->irq.lock, irqflags); 425 radeon_irq_set(rdev); 426 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 427 } 428 } 429 430 /** 431 * radeon_irq_kms_pflip_irq_put - disable pageflip interrupt 432 * 433 * @rdev: radeon device pointer 434 * @crtc: crtc whose interrupt you want to disable 435 * 436 * Disables the pageflip interrupt for a specific crtc (all asics). 437 * For pageflips we use the vblank interrupt source. 438 */ 439 void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc) 440 { 441 unsigned long irqflags; 442 443 if (crtc < 0 || crtc >= rdev->num_crtc) 444 return; 445 446 if (!rdev->ddev->irq_enabled) 447 return; 448 449 if (atomic_dec_and_test(&rdev->irq.pflip[crtc])) { 450 spin_lock_irqsave(&rdev->irq.lock, irqflags); 451 radeon_irq_set(rdev); 452 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 453 } 454 } 455 456 /** 457 * radeon_irq_kms_enable_afmt - enable audio format change interrupt 458 * 459 * @rdev: radeon device pointer 460 * @block: afmt block whose interrupt you want to enable 461 * 462 * Enables the afmt change interrupt for a specific afmt block (all asics). 463 */ 464 void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block) 465 { 466 unsigned long irqflags; 467 468 if (!rdev->ddev->irq_enabled) 469 return; 470 471 spin_lock_irqsave(&rdev->irq.lock, irqflags); 472 rdev->irq.afmt[block] = true; 473 radeon_irq_set(rdev); 474 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 475 476 } 477 478 /** 479 * radeon_irq_kms_disable_afmt - disable audio format change interrupt 480 * 481 * @rdev: radeon device pointer 482 * @block: afmt block whose interrupt you want to disable 483 * 484 * Disables the afmt change interrupt for a specific afmt block (all asics). 485 */ 486 void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block) 487 { 488 unsigned long irqflags; 489 490 if (!rdev->ddev->irq_enabled) 491 return; 492 493 spin_lock_irqsave(&rdev->irq.lock, irqflags); 494 rdev->irq.afmt[block] = false; 495 radeon_irq_set(rdev); 496 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 497 } 498 499 /** 500 * radeon_irq_kms_enable_hpd - enable hotplug detect interrupt 501 * 502 * @rdev: radeon device pointer 503 * @hpd_mask: mask of hpd pins you want to enable. 504 * 505 * Enables the hotplug detect interrupt for a specific hpd pin (all asics). 506 */ 507 void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask) 508 { 509 unsigned long irqflags; 510 int i; 511 512 if (!rdev->ddev->irq_enabled) 513 return; 514 515 spin_lock_irqsave(&rdev->irq.lock, irqflags); 516 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i) 517 rdev->irq.hpd[i] |= !!(hpd_mask & (1 << i)); 518 radeon_irq_set(rdev); 519 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 520 } 521 522 /** 523 * radeon_irq_kms_disable_hpd - disable hotplug detect interrupt 524 * 525 * @rdev: radeon device pointer 526 * @hpd_mask: mask of hpd pins you want to disable. 527 * 528 * Disables the hotplug detect interrupt for a specific hpd pin (all asics). 529 */ 530 void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask) 531 { 532 unsigned long irqflags; 533 int i; 534 535 if (!rdev->ddev->irq_enabled) 536 return; 537 538 spin_lock_irqsave(&rdev->irq.lock, irqflags); 539 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i) 540 rdev->irq.hpd[i] &= !(hpd_mask & (1 << i)); 541 radeon_irq_set(rdev); 542 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 543 } 544 545 /** 546 * radeon_irq_kms_update_int_n - helper for updating interrupt enable registers 547 * 548 * @rdev: radeon device pointer 549 * @reg: the register to write to enable/disable interrupts 550 * @mask: the mask that enables the interrupts 551 * @enable: whether to enable or disable the interrupt register 552 * @name: the name of the interrupt register to print to the kernel log 553 * @num: the number of the interrupt register to print to the kernel log 554 * 555 * Helper for updating the enable state of interrupt registers. Checks whether 556 * or not the interrupt matches the enable state we want. If it doesn't, then 557 * we update it and print a debugging message to the kernel log indicating the 558 * new state of the interrupt register. 559 * 560 * Used for updating sequences of interrupts registers like HPD1, HPD2, etc. 561 */ 562 void radeon_irq_kms_set_irq_n_enabled(struct radeon_device *rdev, 563 u32 reg, u32 mask, 564 bool enable, const char *name, unsigned n) 565 { 566 u32 tmp = RREG32(reg); 567 568 /* Interrupt state didn't change */ 569 if (!!(tmp & mask) == enable) 570 return; 571 572 if (enable) { 573 DRM_DEBUG("%s%d interrupts enabled\n", name, n); 574 WREG32(reg, tmp |= mask); 575 } else { 576 DRM_DEBUG("%s%d interrupts disabled\n", name, n); 577 WREG32(reg, tmp & ~mask); 578 } 579 } 580