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.h" 33 #include "atom.h" 34 35 #define RADEON_WAIT_IDLE_TIMEOUT 200 36 37 /** 38 * radeon_driver_irq_handler_kms - irq handler for KMS 39 * 40 * @DRM_IRQ_ARGS: args 41 * 42 * This is the irq handler for the radeon KMS driver (all asics). 43 * radeon_irq_process is a macro that points to the per-asic 44 * irq handler callback. 45 */ 46 irqreturn_t radeon_driver_irq_handler_kms(DRM_IRQ_ARGS) 47 { 48 struct drm_device *dev = (struct drm_device *) arg; 49 struct radeon_device *rdev = dev->dev_private; 50 51 return radeon_irq_process(rdev); 52 } 53 54 /* 55 * Handle hotplug events outside the interrupt handler proper. 56 */ 57 /** 58 * radeon_hotplug_work_func - display hotplug work handler 59 * 60 * @work: work struct 61 * 62 * This is the hot plug event work handler (all asics). 63 * The work gets scheduled from the irq handler if there 64 * was a hot plug interrupt. It walks the connector table 65 * and calls the hotplug handler for each one, then sends 66 * a drm hotplug event to alert userspace. 67 */ 68 static void radeon_hotplug_work_func(struct work_struct *work) 69 { 70 struct radeon_device *rdev = container_of(work, struct radeon_device, 71 hotplug_work); 72 struct drm_device *dev = rdev->ddev; 73 struct drm_mode_config *mode_config = &dev->mode_config; 74 struct drm_connector *connector; 75 76 if (mode_config->num_connector) { 77 list_for_each_entry(connector, &mode_config->connector_list, head) 78 radeon_connector_hotplug(connector); 79 } 80 /* Just fire off a uevent and let userspace tell us what to do */ 81 drm_helper_hpd_irq_event(dev); 82 } 83 84 /** 85 * radeon_driver_irq_preinstall_kms - drm irq preinstall callback 86 * 87 * @dev: drm dev pointer 88 * 89 * Gets the hw ready to enable irqs (all asics). 90 * This function disables all interrupt sources on the GPU. 91 */ 92 void radeon_driver_irq_preinstall_kms(struct drm_device *dev) 93 { 94 struct radeon_device *rdev = dev->dev_private; 95 unsigned long irqflags; 96 unsigned i; 97 98 spin_lock_irqsave(&rdev->irq.lock, irqflags); 99 /* Disable *all* interrupts */ 100 for (i = 0; i < RADEON_NUM_RINGS; i++) 101 atomic_set(&rdev->irq.ring_int[i], 0); 102 for (i = 0; i < RADEON_MAX_HPD_PINS; i++) 103 rdev->irq.hpd[i] = false; 104 for (i = 0; i < RADEON_MAX_CRTCS; i++) { 105 rdev->irq.crtc_vblank_int[i] = false; 106 atomic_set(&rdev->irq.pflip[i], 0); 107 rdev->irq.afmt[i] = false; 108 } 109 radeon_irq_set(rdev); 110 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 111 /* Clear bits */ 112 radeon_irq_process(rdev); 113 } 114 115 /** 116 * radeon_driver_irq_postinstall_kms - drm irq preinstall callback 117 * 118 * @dev: drm dev pointer 119 * 120 * Handles stuff to be done after enabling irqs (all asics). 121 * Returns 0 on success. 122 */ 123 int radeon_driver_irq_postinstall_kms(struct drm_device *dev) 124 { 125 dev->max_vblank_count = 0x001fffff; 126 return 0; 127 } 128 129 /** 130 * radeon_driver_irq_uninstall_kms - drm irq uninstall callback 131 * 132 * @dev: drm dev pointer 133 * 134 * This function disables all interrupt sources on the GPU (all asics). 135 */ 136 void radeon_driver_irq_uninstall_kms(struct drm_device *dev) 137 { 138 struct radeon_device *rdev = dev->dev_private; 139 unsigned long irqflags; 140 unsigned i; 141 142 if (rdev == NULL) { 143 return; 144 } 145 spin_lock_irqsave(&rdev->irq.lock, irqflags); 146 /* Disable *all* interrupts */ 147 for (i = 0; i < RADEON_NUM_RINGS; i++) 148 atomic_set(&rdev->irq.ring_int[i], 0); 149 for (i = 0; i < RADEON_MAX_HPD_PINS; i++) 150 rdev->irq.hpd[i] = false; 151 for (i = 0; i < RADEON_MAX_CRTCS; i++) { 152 rdev->irq.crtc_vblank_int[i] = false; 153 atomic_set(&rdev->irq.pflip[i], 0); 154 rdev->irq.afmt[i] = false; 155 } 156 radeon_irq_set(rdev); 157 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 158 } 159 160 /** 161 * radeon_msi_ok - asic specific msi checks 162 * 163 * @rdev: radeon device pointer 164 * 165 * Handles asic specific MSI checks to determine if 166 * MSIs should be enabled on a particular chip (all asics). 167 * Returns true if MSIs should be enabled, false if MSIs 168 * should not be enabled. 169 */ 170 static bool radeon_msi_ok(struct radeon_device *rdev) 171 { 172 /* RV370/RV380 was first asic with MSI support */ 173 if (rdev->family < CHIP_RV380) 174 return false; 175 176 /* MSIs don't work on AGP */ 177 if (rdev->flags & RADEON_IS_AGP) 178 return false; 179 180 /* force MSI on */ 181 if (radeon_msi == 1) 182 return true; 183 else if (radeon_msi == 0) 184 return false; 185 186 /* Quirks */ 187 /* HP RS690 only seems to work with MSIs. */ 188 if ((rdev->pdev->device == 0x791f) && 189 (rdev->pdev->subsystem_vendor == 0x103c) && 190 (rdev->pdev->subsystem_device == 0x30c2)) 191 return true; 192 193 /* Dell RS690 only seems to work with MSIs. */ 194 if ((rdev->pdev->device == 0x791f) && 195 (rdev->pdev->subsystem_vendor == 0x1028) && 196 (rdev->pdev->subsystem_device == 0x01fc)) 197 return true; 198 199 /* Dell RS690 only seems to work with MSIs. */ 200 if ((rdev->pdev->device == 0x791f) && 201 (rdev->pdev->subsystem_vendor == 0x1028) && 202 (rdev->pdev->subsystem_device == 0x01fd)) 203 return true; 204 205 /* Gateway RS690 only seems to work with MSIs. */ 206 if ((rdev->pdev->device == 0x791f) && 207 (rdev->pdev->subsystem_vendor == 0x107b) && 208 (rdev->pdev->subsystem_device == 0x0185)) 209 return true; 210 211 /* try and enable MSIs by default on all RS690s */ 212 if (rdev->family == CHIP_RS690) 213 return true; 214 215 /* RV515 seems to have MSI issues where it loses 216 * MSI rearms occasionally. This leads to lockups and freezes. 217 * disable it by default. 218 */ 219 if (rdev->family == CHIP_RV515) 220 return false; 221 if (rdev->flags & RADEON_IS_IGP) { 222 /* APUs work fine with MSIs */ 223 if (rdev->family >= CHIP_PALM) 224 return true; 225 /* lots of IGPs have problems with MSIs */ 226 return false; 227 } 228 229 return true; 230 } 231 232 /** 233 * radeon_irq_kms_init - init driver interrupt info 234 * 235 * @rdev: radeon device pointer 236 * 237 * Sets up the work irq handlers, vblank init, MSIs, etc. (all asics). 238 * Returns 0 for success, error for failure. 239 */ 240 int radeon_irq_kms_init(struct radeon_device *rdev) 241 { 242 int r = 0; 243 244 INIT_WORK(&rdev->hotplug_work, radeon_hotplug_work_func); 245 INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi); 246 247 spin_lock_init(&rdev->irq.lock); 248 r = drm_vblank_init(rdev->ddev, rdev->num_crtc); 249 if (r) { 250 return r; 251 } 252 /* enable msi */ 253 rdev->msi_enabled = 0; 254 255 if (radeon_msi_ok(rdev)) { 256 int ret = pci_enable_msi(rdev->pdev); 257 if (!ret) { 258 rdev->msi_enabled = 1; 259 dev_info(rdev->dev, "radeon: using MSI.\n"); 260 } 261 } 262 rdev->irq.installed = true; 263 r = drm_irq_install(rdev->ddev); 264 if (r) { 265 rdev->irq.installed = false; 266 return r; 267 } 268 DRM_INFO("radeon: irq initialized.\n"); 269 return 0; 270 } 271 272 /** 273 * radeon_irq_kms_fini - tear down driver interrrupt info 274 * 275 * @rdev: radeon device pointer 276 * 277 * Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics). 278 */ 279 void radeon_irq_kms_fini(struct radeon_device *rdev) 280 { 281 drm_vblank_cleanup(rdev->ddev); 282 if (rdev->irq.installed) { 283 drm_irq_uninstall(rdev->ddev); 284 rdev->irq.installed = false; 285 if (rdev->msi_enabled) 286 pci_disable_msi(rdev->pdev); 287 } 288 flush_work(&rdev->hotplug_work); 289 } 290 291 /** 292 * radeon_irq_kms_sw_irq_get - enable software interrupt 293 * 294 * @rdev: radeon device pointer 295 * @ring: ring whose interrupt you want to enable 296 * 297 * Enables the software interrupt for a specific ring (all asics). 298 * The software interrupt is generally used to signal a fence on 299 * a particular ring. 300 */ 301 void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring) 302 { 303 unsigned long irqflags; 304 305 if (!rdev->ddev->irq_enabled) 306 return; 307 308 if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) { 309 spin_lock_irqsave(&rdev->irq.lock, irqflags); 310 radeon_irq_set(rdev); 311 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 312 } 313 } 314 315 /** 316 * radeon_irq_kms_sw_irq_put - disable software interrupt 317 * 318 * @rdev: radeon device pointer 319 * @ring: ring whose interrupt you want to disable 320 * 321 * Disables the software interrupt for a specific ring (all asics). 322 * The software interrupt is generally used to signal a fence on 323 * a particular ring. 324 */ 325 void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring) 326 { 327 unsigned long irqflags; 328 329 if (!rdev->ddev->irq_enabled) 330 return; 331 332 if (atomic_dec_and_test(&rdev->irq.ring_int[ring])) { 333 spin_lock_irqsave(&rdev->irq.lock, irqflags); 334 radeon_irq_set(rdev); 335 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 336 } 337 } 338 339 /** 340 * radeon_irq_kms_pflip_irq_get - enable pageflip interrupt 341 * 342 * @rdev: radeon device pointer 343 * @crtc: crtc whose interrupt you want to enable 344 * 345 * Enables the pageflip interrupt for a specific crtc (all asics). 346 * For pageflips we use the vblank interrupt source. 347 */ 348 void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc) 349 { 350 unsigned long irqflags; 351 352 if (crtc < 0 || crtc >= rdev->num_crtc) 353 return; 354 355 if (!rdev->ddev->irq_enabled) 356 return; 357 358 if (atomic_inc_return(&rdev->irq.pflip[crtc]) == 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_pflip_irq_put - disable pageflip interrupt 367 * 368 * @rdev: radeon device pointer 369 * @crtc: crtc whose interrupt you want to disable 370 * 371 * Disables the pageflip interrupt for a specific crtc (all asics). 372 * For pageflips we use the vblank interrupt source. 373 */ 374 void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc) 375 { 376 unsigned long irqflags; 377 378 if (crtc < 0 || crtc >= rdev->num_crtc) 379 return; 380 381 if (!rdev->ddev->irq_enabled) 382 return; 383 384 if (atomic_dec_and_test(&rdev->irq.pflip[crtc])) { 385 spin_lock_irqsave(&rdev->irq.lock, irqflags); 386 radeon_irq_set(rdev); 387 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 388 } 389 } 390 391 /** 392 * radeon_irq_kms_enable_afmt - enable audio format change interrupt 393 * 394 * @rdev: radeon device pointer 395 * @block: afmt block whose interrupt you want to enable 396 * 397 * Enables the afmt change interrupt for a specific afmt block (all asics). 398 */ 399 void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block) 400 { 401 unsigned long irqflags; 402 403 spin_lock_irqsave(&rdev->irq.lock, irqflags); 404 rdev->irq.afmt[block] = true; 405 radeon_irq_set(rdev); 406 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 407 408 } 409 410 /** 411 * radeon_irq_kms_disable_afmt - disable audio format change interrupt 412 * 413 * @rdev: radeon device pointer 414 * @block: afmt block whose interrupt you want to disable 415 * 416 * Disables the afmt change interrupt for a specific afmt block (all asics). 417 */ 418 void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block) 419 { 420 unsigned long irqflags; 421 422 spin_lock_irqsave(&rdev->irq.lock, irqflags); 423 rdev->irq.afmt[block] = false; 424 radeon_irq_set(rdev); 425 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 426 } 427 428 /** 429 * radeon_irq_kms_enable_hpd - enable hotplug detect interrupt 430 * 431 * @rdev: radeon device pointer 432 * @hpd_mask: mask of hpd pins you want to enable. 433 * 434 * Enables the hotplug detect interrupt for a specific hpd pin (all asics). 435 */ 436 void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask) 437 { 438 unsigned long irqflags; 439 int i; 440 441 spin_lock_irqsave(&rdev->irq.lock, irqflags); 442 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i) 443 rdev->irq.hpd[i] |= !!(hpd_mask & (1 << i)); 444 radeon_irq_set(rdev); 445 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 446 } 447 448 /** 449 * radeon_irq_kms_disable_hpd - disable hotplug detect interrupt 450 * 451 * @rdev: radeon device pointer 452 * @hpd_mask: mask of hpd pins you want to disable. 453 * 454 * Disables the hotplug detect interrupt for a specific hpd pin (all asics). 455 */ 456 void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask) 457 { 458 unsigned long irqflags; 459 int i; 460 461 spin_lock_irqsave(&rdev->irq.lock, irqflags); 462 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i) 463 rdev->irq.hpd[i] &= !(hpd_mask & (1 << i)); 464 radeon_irq_set(rdev); 465 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 466 } 467 468