drivers/gpu/drm/radeon/radeon_irq_kms.c

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