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 <uapi_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(void *arg) 52 { 53 struct drm_device *dev = (struct drm_device *) arg; 54 struct radeon_device *rdev = dev->dev_private; 55 #ifdef PM_TODO 56 irqreturn_t ret; 57 58 ret = radeon_irq_process(rdev); 59 if (ret == IRQ_HANDLED) 60 pm_runtime_mark_last_busy(dev->dev); 61 return ret; 62 #else 63 return radeon_irq_process(rdev); 64 #endif 65 } 66 67 /* 68 * Handle hotplug events outside the interrupt handler proper. 69 */ 70 /** 71 * radeon_hotplug_work_func - display hotplug work handler 72 * 73 * @work: work struct 74 * 75 * This is the hot plug event work handler (all asics). 76 * The work gets scheduled from the irq handler if there 77 * was a hot plug interrupt. It walks the connector table 78 * and calls the hotplug handler for each one, then sends 79 * a drm hotplug event to alert userspace. 80 */ 81 static void radeon_hotplug_work_func(void *arg, int pending) 82 { 83 struct radeon_device *rdev = arg; 84 struct drm_device *dev = rdev->ddev; 85 struct drm_mode_config *mode_config = &dev->mode_config; 86 struct drm_connector *connector; 87 88 if (mode_config->num_connector) { 89 list_for_each_entry(connector, &mode_config->connector_list, head) 90 radeon_connector_hotplug(connector); 91 } 92 /* Just fire off a uevent and let userspace tell us what to do */ 93 drm_helper_hpd_irq_event(dev); 94 } 95 96 /** 97 * radeon_driver_irq_preinstall_kms - drm irq preinstall callback 98 * 99 * @dev: drm dev pointer 100 * 101 * Gets the hw ready to enable irqs (all asics). 102 * This function disables all interrupt sources on the GPU. 103 */ 104 void radeon_driver_irq_preinstall_kms(struct drm_device *dev) 105 { 106 struct radeon_device *rdev = dev->dev_private; 107 unsigned i; 108 109 lockmgr(&rdev->irq.lock, LK_EXCLUSIVE); 110 /* Disable *all* interrupts */ 111 for (i = 0; i < RADEON_NUM_RINGS; i++) 112 atomic_set(&rdev->irq.ring_int[i], 0); 113 rdev->irq.dpm_thermal = false; 114 for (i = 0; i < RADEON_MAX_HPD_PINS; i++) 115 rdev->irq.hpd[i] = false; 116 for (i = 0; i < RADEON_MAX_CRTCS; i++) { 117 rdev->irq.crtc_vblank_int[i] = false; 118 atomic_set(&rdev->irq.pflip[i], 0); 119 rdev->irq.afmt[i] = false; 120 } 121 radeon_irq_set(rdev); 122 lockmgr(&rdev->irq.lock, LK_RELEASE); 123 /* Clear bits */ 124 radeon_irq_process(rdev); 125 } 126 127 /** 128 * radeon_driver_irq_postinstall_kms - drm irq preinstall callback 129 * 130 * @dev: drm dev pointer 131 * 132 * Handles stuff to be done after enabling irqs (all asics). 133 * Returns 0 on success. 134 */ 135 int radeon_driver_irq_postinstall_kms(struct drm_device *dev) 136 { 137 dev->max_vblank_count = 0x001fffff; 138 return 0; 139 } 140 141 /** 142 * radeon_driver_irq_uninstall_kms - drm irq uninstall callback 143 * 144 * @dev: drm dev pointer 145 * 146 * This function disables all interrupt sources on the GPU (all asics). 147 */ 148 void radeon_driver_irq_uninstall_kms(struct drm_device *dev) 149 { 150 struct radeon_device *rdev = dev->dev_private; 151 unsigned i; 152 153 if (rdev == NULL) { 154 return; 155 } 156 lockmgr(&rdev->irq.lock, LK_EXCLUSIVE); 157 /* Disable *all* interrupts */ 158 for (i = 0; i < RADEON_NUM_RINGS; i++) 159 atomic_set(&rdev->irq.ring_int[i], 0); 160 rdev->irq.dpm_thermal = false; 161 for (i = 0; i < RADEON_MAX_HPD_PINS; i++) 162 rdev->irq.hpd[i] = false; 163 for (i = 0; i < RADEON_MAX_CRTCS; i++) { 164 rdev->irq.crtc_vblank_int[i] = false; 165 atomic_set(&rdev->irq.pflip[i], 0); 166 rdev->irq.afmt[i] = false; 167 } 168 radeon_irq_set(rdev); 169 lockmgr(&rdev->irq.lock, LK_RELEASE); 170 } 171 172 /** 173 * radeon_msi_ok - asic specific msi checks 174 * 175 * @rdev: radeon device pointer 176 * 177 * Handles asic specific MSI checks to determine if 178 * MSIs should be enabled on a particular chip (all asics). 179 * Returns true if MSIs should be enabled, false if MSIs 180 * should not be enabled. 181 */ 182 int radeon_msi_ok(struct drm_device *rdev, unsigned long flags) 183 { 184 int family; 185 186 family = flags & RADEON_FAMILY_MASK; 187 188 /* RV370/RV380 was first asic with MSI support */ 189 if (family < CHIP_RV380) 190 return false; 191 192 /* MSIs don't work on AGP */ 193 if (drm_pci_device_is_agp(rdev)) 194 return false; 195 196 /* force MSI on */ 197 if (radeon_msi == 1) 198 return true; 199 else if (radeon_msi == 0) 200 return false; 201 202 /* Quirks */ 203 /* HP RS690 only seems to work with MSIs. */ 204 if ((rdev->pdev->device == 0x791f) && 205 (rdev->pdev->subsystem_vendor == 0x103c) && 206 (rdev->pdev->subsystem_device == 0x30c2)) 207 return true; 208 209 /* Dell RS690 only seems to work with MSIs. */ 210 if ((rdev->pdev->device == 0x791f) && 211 (rdev->pdev->subsystem_vendor == 0x1028) && 212 (rdev->pdev->subsystem_device == 0x01fc)) 213 return true; 214 215 /* Dell RS690 only seems to work with MSIs. */ 216 if ((rdev->pdev->device == 0x791f) && 217 (rdev->pdev->subsystem_vendor == 0x1028) && 218 (rdev->pdev->subsystem_device == 0x01fd)) 219 return true; 220 221 /* Gateway RS690 only seems to work with MSIs. */ 222 if ((rdev->pdev->device == 0x791f) && 223 (rdev->pdev->subsystem_vendor == 0x107b) && 224 (rdev->pdev->subsystem_device == 0x0185)) 225 return true; 226 227 /* try and enable MSIs by default on all RS690s */ 228 if (family == CHIP_RS690) 229 return true; 230 231 /* RV515 seems to have MSI issues where it loses 232 * MSI rearms occasionally. This leads to lockups and freezes. 233 * disable it by default. 234 */ 235 if (family == CHIP_RV515) 236 return false; 237 if (flags & RADEON_IS_IGP) { 238 /* APUs work fine with MSIs */ 239 if (family >= CHIP_PALM) 240 return true; 241 /* lots of IGPs have problems with MSIs */ 242 return false; 243 } 244 245 return true; 246 } 247 248 /** 249 * radeon_irq_kms_init - init driver interrupt info 250 * 251 * @rdev: radeon device pointer 252 * 253 * Sets up the work irq handlers, vblank init, MSIs, etc. (all asics). 254 * Returns 0 for success, error for failure. 255 */ 256 int radeon_irq_kms_init(struct radeon_device *rdev) 257 { 258 int r = 0; 259 260 lockinit(&rdev->irq.lock, "drm__radeon_device__irq__lock", 0, LK_CANRECURSE); 261 r = drm_vblank_init(rdev->ddev, rdev->num_crtc); 262 if (r) { 263 return r; 264 } 265 266 /* enable msi */ 267 rdev->msi_enabled = (rdev->ddev->irq_type == PCI_INTR_TYPE_MSI); 268 269 #ifndef __DragonFly__ 270 if (radeon_msi_ok(rdev)) { 271 int ret = pci_enable_msi(rdev->pdev); 272 if (!ret) { 273 rdev->msi_enabled = 1; 274 dev_info(rdev->dev, "radeon: using MSI.\n"); 275 } 276 } 277 #endif 278 279 TASK_INIT(&rdev->hotplug_work, 0, radeon_hotplug_work_func, rdev); 280 #if 0 281 INIT_WORK(&rdev->dp_work, radeon_dp_work_func); 282 #endif 283 TASK_INIT(&rdev->audio_work, 0, r600_audio_update_hdmi, rdev); 284 285 rdev->irq.installed = true; 286 r = drm_irq_install(rdev->ddev, rdev->ddev->irq); 287 if (r) { 288 rdev->irq.installed = false; 289 taskqueue_drain(rdev->tq, &rdev->hotplug_work); 290 return r; 291 } 292 293 DRM_INFO("radeon: irq initialized.\n"); 294 return 0; 295 } 296 297 /** 298 * radeon_irq_kms_fini - tear down driver interrupt info 299 * 300 * @rdev: radeon device pointer 301 * 302 * Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics). 303 */ 304 void radeon_irq_kms_fini(struct radeon_device *rdev) 305 { 306 drm_vblank_cleanup(rdev->ddev); 307 if (rdev->irq.installed) { 308 drm_irq_uninstall(rdev->ddev); 309 rdev->irq.installed = false; 310 taskqueue_drain(rdev->tq, &rdev->hotplug_work); 311 } 312 } 313 314 /** 315 * radeon_irq_kms_sw_irq_get - enable software interrupt 316 * 317 * @rdev: radeon device pointer 318 * @ring: ring whose interrupt you want to enable 319 * 320 * Enables the software interrupt for a specific ring (all asics). 321 * The software interrupt is generally used to signal a fence on 322 * a particular ring. 323 */ 324 void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring) 325 { 326 if (!rdev->ddev->irq_enabled) 327 return; 328 329 if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) { 330 lockmgr(&rdev->irq.lock, LK_EXCLUSIVE); 331 radeon_irq_set(rdev); 332 lockmgr(&rdev->irq.lock, LK_RELEASE); 333 } 334 } 335 336 /** 337 * radeon_irq_kms_sw_irq_get_delayed - enable software interrupt 338 * 339 * @rdev: radeon device pointer 340 * @ring: ring whose interrupt you want to enable 341 * 342 * Enables the software interrupt for a specific ring (all asics). 343 * The software interrupt is generally used to signal a fence on 344 * a particular ring. 345 */ 346 #ifdef TODO_954605c 347 bool radeon_irq_kms_sw_irq_get_delayed(struct radeon_device *rdev, int ring) 348 { 349 return atomic_inc_return(&rdev->irq.ring_int[ring]) == 1; 350 } 351 #endif 352 353 /** 354 * radeon_irq_kms_sw_irq_put - disable software interrupt 355 * 356 * @rdev: radeon device pointer 357 * @ring: ring whose interrupt you want to disable 358 * 359 * Disables the software interrupt for a specific ring (all asics). 360 * The software interrupt is generally used to signal a fence on 361 * a particular ring. 362 */ 363 void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring) 364 { 365 if (!rdev->ddev->irq_enabled) 366 return; 367 368 if (atomic_dec_and_test(&rdev->irq.ring_int[ring])) { 369 lockmgr(&rdev->irq.lock, LK_EXCLUSIVE); 370 radeon_irq_set(rdev); 371 lockmgr(&rdev->irq.lock, LK_RELEASE); 372 } 373 } 374 375 /** 376 * radeon_irq_kms_pflip_irq_get - enable pageflip interrupt 377 * 378 * @rdev: radeon device pointer 379 * @crtc: crtc whose interrupt you want to enable 380 * 381 * Enables the pageflip interrupt for a specific crtc (all asics). 382 * For pageflips we use the vblank interrupt source. 383 */ 384 void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc) 385 { 386 if (crtc < 0 || crtc >= rdev->num_crtc) 387 return; 388 389 if (!rdev->ddev->irq_enabled) 390 return; 391 392 if (atomic_inc_return(&rdev->irq.pflip[crtc]) == 1) { 393 lockmgr(&rdev->irq.lock, LK_EXCLUSIVE); 394 radeon_irq_set(rdev); 395 lockmgr(&rdev->irq.lock, LK_RELEASE); 396 } 397 } 398 399 /** 400 * radeon_irq_kms_pflip_irq_put - disable pageflip interrupt 401 * 402 * @rdev: radeon device pointer 403 * @crtc: crtc whose interrupt you want to disable 404 * 405 * Disables the pageflip interrupt for a specific crtc (all asics). 406 * For pageflips we use the vblank interrupt source. 407 */ 408 void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc) 409 { 410 if (crtc < 0 || crtc >= rdev->num_crtc) 411 return; 412 413 if (!rdev->ddev->irq_enabled) 414 return; 415 416 if (atomic_dec_and_test(&rdev->irq.pflip[crtc])) { 417 lockmgr(&rdev->irq.lock, LK_EXCLUSIVE); 418 radeon_irq_set(rdev); 419 lockmgr(&rdev->irq.lock, LK_RELEASE); 420 } 421 } 422 423 /** 424 * radeon_irq_kms_enable_afmt - enable audio format change interrupt 425 * 426 * @rdev: radeon device pointer 427 * @block: afmt block whose interrupt you want to enable 428 * 429 * Enables the afmt change interrupt for a specific afmt block (all asics). 430 */ 431 void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block) 432 { 433 if (!rdev->ddev->irq_enabled) 434 return; 435 436 lockmgr(&rdev->irq.lock, LK_EXCLUSIVE); 437 rdev->irq.afmt[block] = true; 438 radeon_irq_set(rdev); 439 lockmgr(&rdev->irq.lock, LK_RELEASE); 440 } 441 442 /** 443 * radeon_irq_kms_disable_afmt - disable audio format change interrupt 444 * 445 * @rdev: radeon device pointer 446 * @block: afmt block whose interrupt you want to disable 447 * 448 * Disables the afmt change interrupt for a specific afmt block (all asics). 449 */ 450 void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block) 451 { 452 if (!rdev->ddev->irq_enabled) 453 return; 454 455 lockmgr(&rdev->irq.lock, LK_EXCLUSIVE); 456 rdev->irq.afmt[block] = false; 457 radeon_irq_set(rdev); 458 lockmgr(&rdev->irq.lock, LK_RELEASE); 459 } 460 461 /** 462 * radeon_irq_kms_enable_hpd - enable hotplug detect interrupt 463 * 464 * @rdev: radeon device pointer 465 * @hpd_mask: mask of hpd pins you want to enable. 466 * 467 * Enables the hotplug detect interrupt for a specific hpd pin (all asics). 468 */ 469 void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask) 470 { 471 int i; 472 473 if (!rdev->ddev->irq_enabled) 474 return; 475 476 lockmgr(&rdev->irq.lock, LK_EXCLUSIVE); 477 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i) 478 rdev->irq.hpd[i] |= !!(hpd_mask & (1 << i)); 479 radeon_irq_set(rdev); 480 lockmgr(&rdev->irq.lock, LK_RELEASE); 481 } 482 483 /** 484 * radeon_irq_kms_disable_hpd - disable hotplug detect interrupt 485 * 486 * @rdev: radeon device pointer 487 * @hpd_mask: mask of hpd pins you want to disable. 488 * 489 * Disables the hotplug detect interrupt for a specific hpd pin (all asics). 490 */ 491 void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask) 492 { 493 int i; 494 495 if (!rdev->ddev->irq_enabled) 496 return; 497 498 lockmgr(&rdev->irq.lock, LK_EXCLUSIVE); 499 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i) 500 rdev->irq.hpd[i] &= !(hpd_mask & (1 << i)); 501 radeon_irq_set(rdev); 502 lockmgr(&rdev->irq.lock, LK_RELEASE); 503 } 504 505