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/radeon_drm.h> 31 #include "radeon_reg.h" 32 #include "radeon_irq_kms.h" 33 #include "radeon.h" 34 #include "atom.h" 35 36 #ifdef PM_TODO 37 #include <linux/pm_runtime.h> 38 #endif 39 40 #define RADEON_WAIT_IDLE_TIMEOUT 200 41 42 /** 43 * radeon_driver_irq_handler_kms - irq handler for KMS 44 * 45 * @void *arg: args 46 * 47 * This is the irq handler for the radeon KMS driver (all asics). 48 * radeon_irq_process is a macro that points to the per-asic 49 * irq handler callback. 50 */ 51 irqreturn_t radeon_driver_irq_handler_kms(int irq, void *arg) 52 { 53 struct drm_device *dev = (struct drm_device *) arg; 54 struct radeon_device *rdev = dev->dev_private; 55 irqreturn_t ret; 56 57 ret = radeon_irq_process(rdev); 58 #ifdef PM_TODO 59 if (ret == IRQ_HANDLED) 60 pm_runtime_mark_last_busy(dev->dev); 61 #endif 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); 83 struct drm_device *dev = rdev->ddev; 84 struct drm_mode_config *mode_config = &dev->mode_config; 85 struct drm_connector *connector; 86 87 if (mode_config->num_connector) { 88 list_for_each_entry(connector, &mode_config->connector_list, head) 89 radeon_connector_hotplug(connector); 90 } 91 /* Just fire off a uevent and let userspace tell us what to do */ 92 drm_helper_hpd_irq_event(dev); 93 } 94 95 /** 96 * radeon_driver_irq_preinstall_kms - drm irq preinstall callback 97 * 98 * @dev: drm dev pointer 99 * 100 * Gets the hw ready to enable irqs (all asics). 101 * This function disables all interrupt sources on the GPU. 102 */ 103 void radeon_driver_irq_preinstall_kms(struct drm_device *dev) 104 { 105 struct radeon_device *rdev = dev->dev_private; 106 unsigned i; 107 108 lockmgr(&rdev->irq.lock, LK_EXCLUSIVE); 109 /* Disable *all* interrupts */ 110 for (i = 0; i < RADEON_NUM_RINGS; i++) 111 atomic_set(&rdev->irq.ring_int[i], 0); 112 rdev->irq.dpm_thermal = false; 113 for (i = 0; i < RADEON_MAX_HPD_PINS; i++) 114 rdev->irq.hpd[i] = false; 115 for (i = 0; i < RADEON_MAX_CRTCS; i++) { 116 rdev->irq.crtc_vblank_int[i] = false; 117 atomic_set(&rdev->irq.pflip[i], 0); 118 rdev->irq.afmt[i] = false; 119 } 120 radeon_irq_set(rdev); 121 lockmgr(&rdev->irq.lock, LK_RELEASE); 122 /* Clear bits */ 123 radeon_irq_process(rdev); 124 } 125 126 /** 127 * radeon_driver_irq_postinstall_kms - drm irq preinstall callback 128 * 129 * @dev: drm dev pointer 130 * 131 * Handles stuff to be done after enabling irqs (all asics). 132 * Returns 0 on success. 133 */ 134 int radeon_driver_irq_postinstall_kms(struct drm_device *dev) 135 { 136 dev->max_vblank_count = 0x001fffff; 137 return 0; 138 } 139 140 /** 141 * radeon_driver_irq_uninstall_kms - drm irq uninstall callback 142 * 143 * @dev: drm dev pointer 144 * 145 * This function disables all interrupt sources on the GPU (all asics). 146 */ 147 void radeon_driver_irq_uninstall_kms(struct drm_device *dev) 148 { 149 struct radeon_device *rdev = dev->dev_private; 150 unsigned i; 151 152 if (rdev == NULL) { 153 return; 154 } 155 lockmgr(&rdev->irq.lock, LK_EXCLUSIVE); 156 /* Disable *all* interrupts */ 157 for (i = 0; i < RADEON_NUM_RINGS; i++) 158 atomic_set(&rdev->irq.ring_int[i], 0); 159 rdev->irq.dpm_thermal = false; 160 for (i = 0; i < RADEON_MAX_HPD_PINS; i++) 161 rdev->irq.hpd[i] = false; 162 for (i = 0; i < RADEON_MAX_CRTCS; i++) { 163 rdev->irq.crtc_vblank_int[i] = false; 164 atomic_set(&rdev->irq.pflip[i], 0); 165 rdev->irq.afmt[i] = false; 166 } 167 radeon_irq_set(rdev); 168 lockmgr(&rdev->irq.lock, LK_RELEASE); 169 } 170 171 /** 172 * radeon_msi_ok - asic specific msi checks 173 * 174 * @rdev: radeon device pointer 175 * 176 * Handles asic specific MSI checks to determine if 177 * MSIs should be enabled on a particular chip (all asics). 178 * Returns true if MSIs should be enabled, false if MSIs 179 * should not be enabled. 180 */ 181 int radeon_msi_ok(struct drm_device *rdev, unsigned long flags) 182 { 183 int family; 184 185 family = flags & RADEON_FAMILY_MASK; 186 187 /* RV370/RV380 was first asic with MSI support */ 188 if (family < CHIP_RV380) 189 return false; 190 191 /* MSIs don't work on AGP */ 192 if (drm_pci_device_is_agp(rdev)) 193 return false; 194 195 /* force MSI on */ 196 if (radeon_msi == 1) 197 return true; 198 else if (radeon_msi == 0) 199 return false; 200 201 /* Quirks */ 202 /* HP RS690 only seems to work with MSIs. */ 203 if ((rdev->pdev->device == 0x791f) && 204 (rdev->pdev->subsystem_vendor == 0x103c) && 205 (rdev->pdev->subsystem_device == 0x30c2)) 206 return true; 207 208 /* Dell RS690 only seems to work with MSIs. */ 209 if ((rdev->pdev->device == 0x791f) && 210 (rdev->pdev->subsystem_vendor == 0x1028) && 211 (rdev->pdev->subsystem_device == 0x01fc)) 212 return true; 213 214 /* Dell RS690 only seems to work with MSIs. */ 215 if ((rdev->pdev->device == 0x791f) && 216 (rdev->pdev->subsystem_vendor == 0x1028) && 217 (rdev->pdev->subsystem_device == 0x01fd)) 218 return true; 219 220 /* Gateway RS690 only seems to work with MSIs. */ 221 if ((rdev->pdev->device == 0x791f) && 222 (rdev->pdev->subsystem_vendor == 0x107b) && 223 (rdev->pdev->subsystem_device == 0x0185)) 224 return true; 225 226 /* try and enable MSIs by default on all RS690s */ 227 if (family == CHIP_RS690) 228 return true; 229 230 /* RV515 seems to have MSI issues where it loses 231 * MSI rearms occasionally. This leads to lockups and freezes. 232 * disable it by default. 233 */ 234 if (family == CHIP_RV515) 235 return false; 236 if (flags & RADEON_IS_IGP) { 237 /* APUs work fine with MSIs */ 238 if (family >= CHIP_PALM) 239 return true; 240 /* lots of IGPs have problems with MSIs */ 241 return false; 242 } 243 244 return true; 245 } 246 247 /** 248 * radeon_irq_kms_init - init driver interrupt info 249 * 250 * @rdev: radeon device pointer 251 * 252 * Sets up the work irq handlers, vblank init, MSIs, etc. (all asics). 253 * Returns 0 for success, error for failure. 254 */ 255 int radeon_irq_kms_init(struct radeon_device *rdev) 256 { 257 int r = 0; 258 259 lockinit(&rdev->irq.lock, "drdil", 0, LK_CANRECURSE); 260 r = drm_vblank_init(rdev->ddev, rdev->num_crtc); 261 if (r) { 262 return r; 263 } 264 265 /* enable msi */ 266 rdev->msi_enabled = (rdev->ddev->pdev->_irq_type == PCI_INTR_TYPE_MSI); 267 268 #ifndef __DragonFly__ 269 if (radeon_msi_ok(rdev)) { 270 int ret = pci_enable_msi(rdev->pdev); 271 if (!ret) { 272 rdev->msi_enabled = 1; 273 dev_info(rdev->dev, "radeon: using MSI.\n"); 274 } 275 } 276 #endif 277 278 INIT_WORK(&rdev->hotplug_work, radeon_hotplug_work_func); 279 INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi); 280 281 rdev->irq.installed = true; 282 r = drm_irq_install(rdev->ddev, rdev->ddev->pdev->irq); 283 if (r) { 284 rdev->irq.installed = false; 285 flush_work(&rdev->hotplug_work); 286 return r; 287 } 288 289 DRM_INFO("radeon: irq initialized.\n"); 290 return 0; 291 } 292 293 /** 294 * radeon_irq_kms_fini - tear down driver interrupt info 295 * 296 * @rdev: radeon device pointer 297 * 298 * Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics). 299 */ 300 void radeon_irq_kms_fini(struct radeon_device *rdev) 301 { 302 drm_vblank_cleanup(rdev->ddev); 303 if (rdev->irq.installed) { 304 drm_irq_uninstall(rdev->ddev); 305 rdev->irq.installed = false; 306 flush_work(&rdev->hotplug_work); 307 } 308 } 309 310 /** 311 * radeon_irq_kms_sw_irq_get - enable software interrupt 312 * 313 * @rdev: radeon device pointer 314 * @ring: ring whose interrupt you want to enable 315 * 316 * Enables the software interrupt for a specific ring (all asics). 317 * The software interrupt is generally used to signal a fence on 318 * a particular ring. 319 */ 320 void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring) 321 { 322 if (!rdev->ddev->irq_enabled) 323 return; 324 325 if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) { 326 lockmgr(&rdev->irq.lock, LK_EXCLUSIVE); 327 radeon_irq_set(rdev); 328 lockmgr(&rdev->irq.lock, LK_RELEASE); 329 } 330 } 331 332 /** 333 * radeon_irq_kms_sw_irq_get_delayed - enable software interrupt 334 * 335 * @rdev: radeon device pointer 336 * @ring: ring whose interrupt you want to enable 337 * 338 * Enables the software interrupt for a specific ring (all asics). 339 * The software interrupt is generally used to signal a fence on 340 * a particular ring. 341 */ 342 #ifdef TODO_954605c 343 bool radeon_irq_kms_sw_irq_get_delayed(struct radeon_device *rdev, int ring) 344 { 345 return atomic_inc_return(&rdev->irq.ring_int[ring]) == 1; 346 } 347 #endif 348 349 /** 350 * radeon_irq_kms_sw_irq_put - disable software interrupt 351 * 352 * @rdev: radeon device pointer 353 * @ring: ring whose interrupt you want to disable 354 * 355 * Disables the software interrupt for a specific ring (all asics). 356 * The software interrupt is generally used to signal a fence on 357 * a particular ring. 358 */ 359 void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring) 360 { 361 if (!rdev->ddev->irq_enabled) 362 return; 363 364 if (atomic_dec_and_test(&rdev->irq.ring_int[ring])) { 365 lockmgr(&rdev->irq.lock, LK_EXCLUSIVE); 366 radeon_irq_set(rdev); 367 lockmgr(&rdev->irq.lock, LK_RELEASE); 368 } 369 } 370 371 /** 372 * radeon_irq_kms_pflip_irq_get - enable pageflip interrupt 373 * 374 * @rdev: radeon device pointer 375 * @crtc: crtc whose interrupt you want to enable 376 * 377 * Enables the pageflip interrupt for a specific crtc (all asics). 378 * For pageflips we use the vblank interrupt source. 379 */ 380 void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc) 381 { 382 if (crtc < 0 || crtc >= rdev->num_crtc) 383 return; 384 385 if (!rdev->ddev->irq_enabled) 386 return; 387 388 if (atomic_inc_return(&rdev->irq.pflip[crtc]) == 1) { 389 lockmgr(&rdev->irq.lock, LK_EXCLUSIVE); 390 radeon_irq_set(rdev); 391 lockmgr(&rdev->irq.lock, LK_RELEASE); 392 } 393 } 394 395 /** 396 * radeon_irq_kms_pflip_irq_put - disable pageflip interrupt 397 * 398 * @rdev: radeon device pointer 399 * @crtc: crtc whose interrupt you want to disable 400 * 401 * Disables the pageflip interrupt for a specific crtc (all asics). 402 * For pageflips we use the vblank interrupt source. 403 */ 404 void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc) 405 { 406 if (crtc < 0 || crtc >= rdev->num_crtc) 407 return; 408 409 if (!rdev->ddev->irq_enabled) 410 return; 411 412 if (atomic_dec_and_test(&rdev->irq.pflip[crtc])) { 413 lockmgr(&rdev->irq.lock, LK_EXCLUSIVE); 414 radeon_irq_set(rdev); 415 lockmgr(&rdev->irq.lock, LK_RELEASE); 416 } 417 } 418 419 /** 420 * radeon_irq_kms_enable_afmt - enable audio format change interrupt 421 * 422 * @rdev: radeon device pointer 423 * @block: afmt block whose interrupt you want to enable 424 * 425 * Enables the afmt change interrupt for a specific afmt block (all asics). 426 */ 427 void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block) 428 { 429 if (!rdev->ddev->irq_enabled) 430 return; 431 432 lockmgr(&rdev->irq.lock, LK_EXCLUSIVE); 433 rdev->irq.afmt[block] = true; 434 radeon_irq_set(rdev); 435 lockmgr(&rdev->irq.lock, LK_RELEASE); 436 } 437 438 /** 439 * radeon_irq_kms_disable_afmt - disable audio format change interrupt 440 * 441 * @rdev: radeon device pointer 442 * @block: afmt block whose interrupt you want to disable 443 * 444 * Disables the afmt change interrupt for a specific afmt block (all asics). 445 */ 446 void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block) 447 { 448 if (!rdev->ddev->irq_enabled) 449 return; 450 451 lockmgr(&rdev->irq.lock, LK_EXCLUSIVE); 452 rdev->irq.afmt[block] = false; 453 radeon_irq_set(rdev); 454 lockmgr(&rdev->irq.lock, LK_RELEASE); 455 } 456 457 /** 458 * radeon_irq_kms_enable_hpd - enable hotplug detect interrupt 459 * 460 * @rdev: radeon device pointer 461 * @hpd_mask: mask of hpd pins you want to enable. 462 * 463 * Enables the hotplug detect interrupt for a specific hpd pin (all asics). 464 */ 465 void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask) 466 { 467 int i; 468 469 if (!rdev->ddev->irq_enabled) 470 return; 471 472 lockmgr(&rdev->irq.lock, LK_EXCLUSIVE); 473 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i) 474 rdev->irq.hpd[i] |= !!(hpd_mask & (1 << i)); 475 radeon_irq_set(rdev); 476 lockmgr(&rdev->irq.lock, LK_RELEASE); 477 } 478 479 /** 480 * radeon_irq_kms_disable_hpd - disable hotplug detect interrupt 481 * 482 * @rdev: radeon device pointer 483 * @hpd_mask: mask of hpd pins you want to disable. 484 * 485 * Disables the hotplug detect interrupt for a specific hpd pin (all asics). 486 */ 487 void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask) 488 { 489 int i; 490 491 if (!rdev->ddev->irq_enabled) 492 return; 493 494 lockmgr(&rdev->irq.lock, LK_EXCLUSIVE); 495 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i) 496 rdev->irq.hpd[i] &= !(hpd_mask & (1 << i)); 497 radeon_irq_set(rdev); 498 lockmgr(&rdev->irq.lock, LK_RELEASE); 499 } 500 501