drivers/gpu/drm/i915/i915_drv.c

   1 /* i915_drv.c -- i830,i845,i855,i865,i915 driver -*- linux-c -*-
   2  */
   3 /*
   4  *
   5  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   6  * All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the
  10  * "Software"), to deal in the Software without restriction, including
  11  * without limitation the rights to use, copy, modify, merge, publish,
  12  * distribute, sub license, and/or sell copies of the Software, and to
  13  * permit persons to whom the Software is furnished to do so, subject to
  14  * the following conditions:
  15  *
  16  * The above copyright notice and this permission notice (including the
  17  * next paragraph) shall be included in all copies or substantial portions
  18  * of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  21  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  23  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  24  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  25  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  26  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27  *
  28  */
  29
  30 #include <linux/device.h>
  31 #include "drmP.h"
  32 #include "drm.h"
  33 #include "i915_drm.h"
  34 #include "i915_drv.h"
  35
  36 #include "drm_pciids.h"
  37 #include <linux/console.h>
  38 #include "drm_crtc_helper.h"
  39
  40 static int i915_modeset = -1;
  41 module_param_named(modeset, i915_modeset, int, 0400);
  42
  43 unsigned int i915_fbpercrtc = 0;
  44 module_param_named(fbpercrtc, i915_fbpercrtc, int, 0400);
  45
  46 unsigned int i915_powersave = 1;
  47 module_param_named(powersave, i915_powersave, int, 0400);
  48
  49 static struct drm_driver driver;
  50
  51 static struct pci_device_id pciidlist[] = {
  52         i915_PCI_IDS
  53 };
  54
  55 #if defined(CONFIG_DRM_I915_KMS)
  56 MODULE_DEVICE_TABLE(pci, pciidlist);
  57 #endif
  58
  59 static int i915_suspend(struct drm_device *dev, pm_message_t state)
  60 {
  61         struct drm_i915_private *dev_priv = dev->dev_private;
  62
  63         if (!dev || !dev_priv) {
  64                 DRM_ERROR("dev: %p, dev_priv: %p\n", dev, dev_priv);
  65                 DRM_ERROR("DRM not initialized, aborting suspend.\n");
  66                 return -ENODEV;
  67         }
  68
  69         if (state.event == PM_EVENT_PRETHAW)
  70                 return 0;
  71
  72         pci_save_state(dev->pdev);
  73
  74         /* If KMS is active, we do the leavevt stuff here */
  75         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
  76                 if (i915_gem_idle(dev))
  77                         dev_err(&dev->pdev->dev,
  78                                 "GEM idle failed, resume may fail\n");
  79                 drm_irq_uninstall(dev);
  80         }
  81
  82         i915_save_state(dev);
  83
  84         intel_opregion_free(dev, 1);
  85
  86         if (state.event == PM_EVENT_SUSPEND) {
  87                 /* Shut down the device */
  88                 pci_disable_device(dev->pdev);
  89                 pci_set_power_state(dev->pdev, PCI_D3hot);
  90         }
  91
  92         dev_priv->suspended = 1;
  93
  94         return 0;
  95 }
  96
  97 static int i915_resume(struct drm_device *dev)
  98 {
  99         struct drm_i915_private *dev_priv = dev->dev_private;
 100         int ret = 0;
 101
 102         if (pci_enable_device(dev->pdev))
 103                 return -1;
 104         pci_set_master(dev->pdev);
 105
 106         i915_restore_state(dev);
 107
 108         intel_opregion_init(dev, 1);
 109
 110         /* KMS EnterVT equivalent */
 111         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 112                 mutex_lock(&dev->struct_mutex);
 113                 dev_priv->mm.suspended = 0;
 114
 115                 ret = i915_gem_init_ringbuffer(dev);
 116                 if (ret != 0)
 117                         ret = -1;
 118                 mutex_unlock(&dev->struct_mutex);
 119
 120                 drm_irq_install(dev);
 121         }
 122         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 123                 /* Resume the modeset for every activated CRTC */
 124                 drm_helper_resume_force_mode(dev);
 125         }
 126
 127         dev_priv->suspended = 0;
 128
 129         return ret;
 130 }
 131
 132 /**
 133  * i965_reset - reset chip after a hang
 134  * @dev: drm device to reset
 135  * @flags: reset domains
 136  *
 137  * Reset the chip.  Useful if a hang is detected. Returns zero on successful
 138  * reset or otherwise an error code.
 139  *
 140  * Procedure is fairly simple:
 141  *   - reset the chip using the reset reg
 142  *   - re-init context state
 143  *   - re-init hardware status page
 144  *   - re-init ring buffer
 145  *   - re-init interrupt state
 146  *   - re-init display
 147  */
 148 int i965_reset(struct drm_device *dev, u8 flags)
 149 {
 150         drm_i915_private_t *dev_priv = dev->dev_private;
 151         unsigned long timeout;
 152         u8 gdrst;
 153         /*
 154          * We really should only reset the display subsystem if we actually
 155          * need to
 156          */
 157         bool need_display = true;
 158
 159         mutex_lock(&dev->struct_mutex);
 160
 161         /*
 162          * Clear request list
 163          */
 164         i915_gem_retire_requests(dev);
 165
 166         if (need_display)
 167                 i915_save_display(dev);
 168
 169         if (IS_I965G(dev) || IS_G4X(dev)) {
 170                 /*
 171                  * Set the domains we want to reset, then the reset bit (bit 0).
 172                  * Clear the reset bit after a while and wait for hardware status
 173                  * bit (bit 1) to be set
 174                  */
 175                 pci_read_config_byte(dev->pdev, GDRST, &gdrst);
 176                 pci_write_config_byte(dev->pdev, GDRST, gdrst | flags | ((flags == GDRST_FULL) ? 0x1 : 0x0));
 177                 udelay(50);
 178                 pci_write_config_byte(dev->pdev, GDRST, gdrst & 0xfe);
 179
 180                 /* ...we don't want to loop forever though, 500ms should be plenty */
 181                timeout = jiffies + msecs_to_jiffies(500);
 182                 do {
 183                         udelay(100);
 184                         pci_read_config_byte(dev->pdev, GDRST, &gdrst);
 185                 } while ((gdrst & 0x1) && time_after(timeout, jiffies));
 186
 187                 if (gdrst & 0x1) {
 188                         WARN(true, "i915: Failed to reset chip\n");
 189                         mutex_unlock(&dev->struct_mutex);
 190                         return -EIO;
 191                 }
 192         } else {
 193                 DRM_ERROR("Error occurred. Don't know how to reset this chip.\n");
 194                 return -ENODEV;
 195         }
 196
 197         /* Ok, now get things going again... */
 198
 199         /*
 200          * Everything depends on having the GTT running, so we need to start
 201          * there.  Fortunately we don't need to do this unless we reset the
 202          * chip at a PCI level.
 203          *
 204          * Next we need to restore the context, but we don't use those
 205          * yet either...
 206          *
 207          * Ring buffer needs to be re-initialized in the KMS case, or if X
 208          * was running at the time of the reset (i.e. we weren't VT
 209          * switched away).
 210          */
 211         if (drm_core_check_feature(dev, DRIVER_MODESET) ||
 212             !dev_priv->mm.suspended) {
 213                 drm_i915_ring_buffer_t *ring = &dev_priv->ring;
 214                 struct drm_gem_object *obj = ring->ring_obj;
 215                 struct drm_i915_gem_object *obj_priv = obj->driver_private;
 216                 dev_priv->mm.suspended = 0;
 217
 218                 /* Stop the ring if it's running. */
 219                 I915_WRITE(PRB0_CTL, 0);
 220                 I915_WRITE(PRB0_TAIL, 0);
 221                 I915_WRITE(PRB0_HEAD, 0);
 222
 223                 /* Initialize the ring. */
 224                 I915_WRITE(PRB0_START, obj_priv->gtt_offset);
 225                 I915_WRITE(PRB0_CTL,
 226                            ((obj->size - 4096) & RING_NR_PAGES) |
 227                            RING_NO_REPORT |
 228                            RING_VALID);
 229                 if (!drm_core_check_feature(dev, DRIVER_MODESET))
 230                         i915_kernel_lost_context(dev);
 231                 else {
 232                         ring->head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
 233                         ring->tail = I915_READ(PRB0_TAIL) & TAIL_ADDR;
 234                         ring->space = ring->head - (ring->tail + 8);
 235                         if (ring->space < 0)
 236                                 ring->space += ring->Size;
 237                 }
 238
 239                 mutex_unlock(&dev->struct_mutex);
 240                 drm_irq_uninstall(dev);
 241                 drm_irq_install(dev);
 242                 mutex_lock(&dev->struct_mutex);
 243         }
 244
 245         /*
 246          * Display needs restore too...
 247          */
 248         if (need_display)
 249                 i915_restore_display(dev);
 250
 251         mutex_unlock(&dev->struct_mutex);
 252         return 0;
 253 }
 254
 255
 256 static int __devinit
 257 i915_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 258 {
 259         return drm_get_dev(pdev, ent, &driver);
 260 }
 261
 262 static void
 263 i915_pci_remove(struct pci_dev *pdev)
 264 {
 265         struct drm_device *dev = pci_get_drvdata(pdev);
 266
 267         drm_put_dev(dev);
 268 }
 269
 270 static int
 271 i915_pci_suspend(struct pci_dev *pdev, pm_message_t state)
 272 {
 273         struct drm_device *dev = pci_get_drvdata(pdev);
 274
 275         return i915_suspend(dev, state);
 276 }
 277
 278 static int
 279 i915_pci_resume(struct pci_dev *pdev)
 280 {
 281         struct drm_device *dev = pci_get_drvdata(pdev);
 282
 283         return i915_resume(dev);
 284 }
 285
 286 static struct vm_operations_struct i915_gem_vm_ops = {
 287         .fault = i915_gem_fault,
 288         .open = drm_gem_vm_open,
 289         .close = drm_gem_vm_close,
 290 };
 291
 292 static struct drm_driver driver = {
 293         /* don't use mtrr's here, the Xserver or user space app should
 294          * deal with them for intel hardware.
 295          */
 296         .driver_features =
 297             DRIVER_USE_AGP | DRIVER_REQUIRE_AGP | /* DRIVER_USE_MTRR |*/
 298             DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED | DRIVER_GEM,
 299         .load = i915_driver_load,
 300         .unload = i915_driver_unload,
 301         .open = i915_driver_open,
 302         .lastclose = i915_driver_lastclose,
 303         .preclose = i915_driver_preclose,
 304         .postclose = i915_driver_postclose,
 305         .suspend = i915_suspend,
 306         .resume = i915_resume,
 307         .device_is_agp = i915_driver_device_is_agp,
 308         .enable_vblank = i915_enable_vblank,
 309         .disable_vblank = i915_disable_vblank,
 310         .irq_preinstall = i915_driver_irq_preinstall,
 311         .irq_postinstall = i915_driver_irq_postinstall,
 312         .irq_uninstall = i915_driver_irq_uninstall,
 313         .irq_handler = i915_driver_irq_handler,
 314         .reclaim_buffers = drm_core_reclaim_buffers,
 315         .get_map_ofs = drm_core_get_map_ofs,
 316         .get_reg_ofs = drm_core_get_reg_ofs,
 317         .master_create = i915_master_create,
 318         .master_destroy = i915_master_destroy,
 319 #if defined(CONFIG_DEBUG_FS)
 320         .debugfs_init = i915_debugfs_init,
 321         .debugfs_cleanup = i915_debugfs_cleanup,
 322 #endif
 323         .gem_init_object = i915_gem_init_object,
 324         .gem_free_object = i915_gem_free_object,
 325         .gem_vm_ops = &i915_gem_vm_ops,
 326         .ioctls = i915_ioctls,
 327         .fops = {
 328                  .owner = THIS_MODULE,
 329                  .open = drm_open,
 330                  .release = drm_release,
 331                  .ioctl = drm_ioctl,
 332                  .mmap = drm_gem_mmap,
 333                  .poll = drm_poll,
 334                  .fasync = drm_fasync,
 335 #ifdef CONFIG_COMPAT
 336                  .compat_ioctl = i915_compat_ioctl,
 337 #endif
 338         },
 339
 340         .pci_driver = {
 341                  .name = DRIVER_NAME,
 342                  .id_table = pciidlist,
 343                  .probe = i915_pci_probe,
 344                  .remove = i915_pci_remove,
 345 #ifdef CONFIG_PM
 346                  .resume = i915_pci_resume,
 347                  .suspend = i915_pci_suspend,
 348 #endif
 349         },
 350
 351         .name = DRIVER_NAME,
 352         .desc = DRIVER_DESC,
 353         .date = DRIVER_DATE,
 354         .major = DRIVER_MAJOR,
 355         .minor = DRIVER_MINOR,
 356         .patchlevel = DRIVER_PATCHLEVEL,
 357 };
 358
 359 static int __init i915_init(void)
 360 {
 361         driver.num_ioctls = i915_max_ioctl;
 362
 363         i915_gem_shrinker_init();
 364
 365         /*
 366          * If CONFIG_DRM_I915_KMS is set, default to KMS unless
 367          * explicitly disabled with the module pararmeter.
 368          *
 369          * Otherwise, just follow the parameter (defaulting to off).
 370          *
 371          * Allow optional vga_text_mode_force boot option to override
 372          * the default behavior.
 373          */
 374 #if defined(CONFIG_DRM_I915_KMS)
 375         if (i915_modeset != 0)
 376                 driver.driver_features |= DRIVER_MODESET;
 377 #endif
 378         if (i915_modeset == 1)
 379                 driver.driver_features |= DRIVER_MODESET;
 380
 381 #ifdef CONFIG_VGA_CONSOLE
 382         if (vgacon_text_force() && i915_modeset == -1)
 383                 driver.driver_features &= ~DRIVER_MODESET;
 384 #endif
 385
 386         return drm_init(&driver);
 387 }
 388
 389 static void __exit i915_exit(void)
 390 {
 391         i915_gem_shrinker_exit();
 392         drm_exit(&driver);
 393 }
 394
 395 module_init(i915_init);
 396 module_exit(i915_exit);
 397
 398 MODULE_AUTHOR(DRIVER_AUTHOR);
 399 MODULE_DESCRIPTION(DRIVER_DESC);
 400 MODULE_LICENSE("GPL and additional rights");