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         return 0;
  93 }
  94
  95 static int i915_resume(struct drm_device *dev)
  96 {
  97         struct drm_i915_private *dev_priv = dev->dev_private;
  98         int ret = 0;
  99
 100         pci_set_power_state(dev->pdev, PCI_D0);
 101         pci_restore_state(dev->pdev);
 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         return ret;
 128 }
 129
 130 /**
 131  * i965_reset - reset chip after a hang
 132  * @dev: drm device to reset
 133  * @flags: reset domains
 134  *
 135  * Reset the chip.  Useful if a hang is detected. Returns zero on successful
 136  * reset or otherwise an error code.
 137  *
 138  * Procedure is fairly simple:
 139  *   - reset the chip using the reset reg
 140  *   - re-init context state
 141  *   - re-init hardware status page
 142  *   - re-init ring buffer
 143  *   - re-init interrupt state
 144  *   - re-init display
 145  */
 146 int i965_reset(struct drm_device *dev, u8 flags)
 147 {
 148         drm_i915_private_t *dev_priv = dev->dev_private;
 149         unsigned long timeout;
 150         u8 gdrst;
 151         /*
 152          * We really should only reset the display subsystem if we actually
 153          * need to
 154          */
 155         bool need_display = true;
 156
 157         mutex_lock(&dev->struct_mutex);
 158
 159         /*
 160          * Clear request list
 161          */
 162         i915_gem_retire_requests(dev);
 163
 164         if (need_display)
 165                 i915_save_display(dev);
 166
 167         if (IS_I965G(dev) || IS_G4X(dev)) {
 168                 /*
 169                  * Set the domains we want to reset, then the reset bit (bit 0).
 170                  * Clear the reset bit after a while and wait for hardware status
 171                  * bit (bit 1) to be set
 172                  */
 173                 pci_read_config_byte(dev->pdev, GDRST, &gdrst);
 174                 pci_write_config_byte(dev->pdev, GDRST, gdrst | flags | ((flags == GDRST_FULL) ? 0x1 : 0x0));
 175                 udelay(50);
 176                 pci_write_config_byte(dev->pdev, GDRST, gdrst & 0xfe);
 177
 178                 /* ...we don't want to loop forever though, 500ms should be plenty */
 179                timeout = jiffies + msecs_to_jiffies(500);
 180                 do {
 181                         udelay(100);
 182                         pci_read_config_byte(dev->pdev, GDRST, &gdrst);
 183                 } while ((gdrst & 0x1) && time_after(timeout, jiffies));
 184
 185                 if (gdrst & 0x1) {
 186                         WARN(true, "i915: Failed to reset chip\n");
 187                         mutex_unlock(&dev->struct_mutex);
 188                         return -EIO;
 189                 }
 190         } else {
 191                 DRM_ERROR("Error occurred. Don't know how to reset this chip.\n");
 192                 return -ENODEV;
 193         }
 194
 195         /* Ok, now get things going again... */
 196
 197         /*
 198          * Everything depends on having the GTT running, so we need to start
 199          * there.  Fortunately we don't need to do this unless we reset the
 200          * chip at a PCI level.
 201          *
 202          * Next we need to restore the context, but we don't use those
 203          * yet either...
 204          *
 205          * Ring buffer needs to be re-initialized in the KMS case, or if X
 206          * was running at the time of the reset (i.e. we weren't VT
 207          * switched away).
 208          */
 209         if (drm_core_check_feature(dev, DRIVER_MODESET) ||
 210             !dev_priv->mm.suspended) {
 211                 drm_i915_ring_buffer_t *ring = &dev_priv->ring;
 212                 struct drm_gem_object *obj = ring->ring_obj;
 213                 struct drm_i915_gem_object *obj_priv = obj->driver_private;
 214                 dev_priv->mm.suspended = 0;
 215
 216                 /* Stop the ring if it's running. */
 217                 I915_WRITE(PRB0_CTL, 0);
 218                 I915_WRITE(PRB0_TAIL, 0);
 219                 I915_WRITE(PRB0_HEAD, 0);
 220
 221                 /* Initialize the ring. */
 222                 I915_WRITE(PRB0_START, obj_priv->gtt_offset);
 223                 I915_WRITE(PRB0_CTL,
 224                            ((obj->size - 4096) & RING_NR_PAGES) |
 225                            RING_NO_REPORT |
 226                            RING_VALID);
 227                 if (!drm_core_check_feature(dev, DRIVER_MODESET))
 228                         i915_kernel_lost_context(dev);
 229                 else {
 230                         ring->head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
 231                         ring->tail = I915_READ(PRB0_TAIL) & TAIL_ADDR;
 232                         ring->space = ring->head - (ring->tail + 8);
 233                         if (ring->space < 0)
 234                                 ring->space += ring->Size;
 235                 }
 236
 237                 mutex_unlock(&dev->struct_mutex);
 238                 drm_irq_uninstall(dev);
 239                 drm_irq_install(dev);
 240                 mutex_lock(&dev->struct_mutex);
 241         }
 242
 243         /*
 244          * Display needs restore too...
 245          */
 246         if (need_display)
 247                 i915_restore_display(dev);
 248
 249         mutex_unlock(&dev->struct_mutex);
 250         return 0;
 251 }
 252
 253
 254 static int __devinit
 255 i915_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 256 {
 257         return drm_get_dev(pdev, ent, &driver);
 258 }
 259
 260 static void
 261 i915_pci_remove(struct pci_dev *pdev)
 262 {
 263         struct drm_device *dev = pci_get_drvdata(pdev);
 264
 265         drm_put_dev(dev);
 266 }
 267
 268 static int
 269 i915_pci_suspend(struct pci_dev *pdev, pm_message_t state)
 270 {
 271         struct drm_device *dev = pci_get_drvdata(pdev);
 272
 273         return i915_suspend(dev, state);
 274 }
 275
 276 static int
 277 i915_pci_resume(struct pci_dev *pdev)
 278 {
 279         struct drm_device *dev = pci_get_drvdata(pdev);
 280
 281         return i915_resume(dev);
 282 }
 283
 284 static struct vm_operations_struct i915_gem_vm_ops = {
 285         .fault = i915_gem_fault,
 286         .open = drm_gem_vm_open,
 287         .close = drm_gem_vm_close,
 288 };
 289
 290 static struct drm_driver driver = {
 291         /* don't use mtrr's here, the Xserver or user space app should
 292          * deal with them for intel hardware.
 293          */
 294         .driver_features =
 295             DRIVER_USE_AGP | DRIVER_REQUIRE_AGP | /* DRIVER_USE_MTRR |*/
 296             DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED | DRIVER_GEM,
 297         .load = i915_driver_load,
 298         .unload = i915_driver_unload,
 299         .open = i915_driver_open,
 300         .lastclose = i915_driver_lastclose,
 301         .preclose = i915_driver_preclose,
 302         .postclose = i915_driver_postclose,
 303         .suspend = i915_suspend,
 304         .resume = i915_resume,
 305         .device_is_agp = i915_driver_device_is_agp,
 306         .enable_vblank = i915_enable_vblank,
 307         .disable_vblank = i915_disable_vblank,
 308         .irq_preinstall = i915_driver_irq_preinstall,
 309         .irq_postinstall = i915_driver_irq_postinstall,
 310         .irq_uninstall = i915_driver_irq_uninstall,
 311         .irq_handler = i915_driver_irq_handler,
 312         .reclaim_buffers = drm_core_reclaim_buffers,
 313         .get_map_ofs = drm_core_get_map_ofs,
 314         .get_reg_ofs = drm_core_get_reg_ofs,
 315         .master_create = i915_master_create,
 316         .master_destroy = i915_master_destroy,
 317 #if defined(CONFIG_DEBUG_FS)
 318         .debugfs_init = i915_debugfs_init,
 319         .debugfs_cleanup = i915_debugfs_cleanup,
 320 #endif
 321         .gem_init_object = i915_gem_init_object,
 322         .gem_free_object = i915_gem_free_object,
 323         .gem_vm_ops = &i915_gem_vm_ops,
 324         .ioctls = i915_ioctls,
 325         .fops = {
 326                  .owner = THIS_MODULE,
 327                  .open = drm_open,
 328                  .release = drm_release,
 329                  .ioctl = drm_ioctl,
 330                  .mmap = drm_gem_mmap,
 331                  .poll = drm_poll,
 332                  .fasync = drm_fasync,
 333 #ifdef CONFIG_COMPAT
 334                  .compat_ioctl = i915_compat_ioctl,
 335 #endif
 336         },
 337
 338         .pci_driver = {
 339                  .name = DRIVER_NAME,
 340                  .id_table = pciidlist,
 341                  .probe = i915_pci_probe,
 342                  .remove = i915_pci_remove,
 343 #ifdef CONFIG_PM
 344                  .resume = i915_pci_resume,
 345                  .suspend = i915_pci_suspend,
 346 #endif
 347         },
 348
 349         .name = DRIVER_NAME,
 350         .desc = DRIVER_DESC,
 351         .date = DRIVER_DATE,
 352         .major = DRIVER_MAJOR,
 353         .minor = DRIVER_MINOR,
 354         .patchlevel = DRIVER_PATCHLEVEL,
 355 };
 356
 357 static int __init i915_init(void)
 358 {
 359         driver.num_ioctls = i915_max_ioctl;
 360
 361         /*
 362          * If CONFIG_DRM_I915_KMS is set, default to KMS unless
 363          * explicitly disabled with the module pararmeter.
 364          *
 365          * Otherwise, just follow the parameter (defaulting to off).
 366          *
 367          * Allow optional vga_text_mode_force boot option to override
 368          * the default behavior.
 369          */
 370 #if defined(CONFIG_DRM_I915_KMS)
 371         if (i915_modeset != 0)
 372                 driver.driver_features |= DRIVER_MODESET;
 373 #endif
 374         if (i915_modeset == 1)
 375                 driver.driver_features |= DRIVER_MODESET;
 376
 377 #ifdef CONFIG_VGA_CONSOLE
 378         if (vgacon_text_force() && i915_modeset == -1)
 379                 driver.driver_features &= ~DRIVER_MODESET;
 380 #endif
 381
 382         return drm_init(&driver);
 383 }
 384
 385 static void __exit i915_exit(void)
 386 {
 387         drm_exit(&driver);
 388 }
 389
 390 module_init(i915_init);
 391 module_exit(i915_exit);
 392
 393 MODULE_AUTHOR(DRIVER_AUTHOR);
 394 MODULE_DESCRIPTION(DRIVER_DESC);
 395 MODULE_LICENSE("GPL and additional rights");