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_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 interrupt 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         if (!rdev->ddev->irq_enabled)
 404                 return;
 405
 406         spin_lock_irqsave(&rdev->irq.lock, irqflags);
 407         rdev->irq.afmt[block] = true;
 408         radeon_irq_set(rdev);
 409         spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
 410
 411 }
 412
 413 /**
 414  * radeon_irq_kms_disable_afmt - disable audio format change interrupt
 415  *
 416  * @rdev: radeon device pointer
 417  * @block: afmt block whose interrupt you want to disable
 418  *
 419  * Disables the afmt change interrupt for a specific afmt block (all asics).
 420  */
 421 void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block)
 422 {
 423         unsigned long irqflags;
 424
 425         if (!rdev->ddev->irq_enabled)
 426                 return;
 427
 428         spin_lock_irqsave(&rdev->irq.lock, irqflags);
 429         rdev->irq.afmt[block] = false;
 430         radeon_irq_set(rdev);
 431         spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
 432 }
 433
 434 /**
 435  * radeon_irq_kms_enable_hpd - enable hotplug detect interrupt
 436  *
 437  * @rdev: radeon device pointer
 438  * @hpd_mask: mask of hpd pins you want to enable.
 439  *
 440  * Enables the hotplug detect interrupt for a specific hpd pin (all asics).
 441  */
 442 void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
 443 {
 444         unsigned long irqflags;
 445         int i;
 446
 447         if (!rdev->ddev->irq_enabled)
 448                 return;
 449
 450         spin_lock_irqsave(&rdev->irq.lock, irqflags);
 451         for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
 452                 rdev->irq.hpd[i] |= !!(hpd_mask & (1 << i));
 453         radeon_irq_set(rdev);
 454         spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
 455 }
 456
 457 /**
 458  * radeon_irq_kms_disable_hpd - disable hotplug detect interrupt
 459  *
 460  * @rdev: radeon device pointer
 461  * @hpd_mask: mask of hpd pins you want to disable.
 462  *
 463  * Disables the hotplug detect interrupt for a specific hpd pin (all asics).
 464  */
 465 void radeon_irq_kms_disable_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