Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-next-2.6
[linux-2.6.git] / 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         /* Modeset on resume, not lid events */
93         dev_priv->modeset_on_lid = 0;
94
95         return 0;
96 }
97
98 static int i915_resume(struct drm_device *dev)
99 {
100         struct drm_i915_private *dev_priv = dev->dev_private;
101         int ret = 0;
102
103         if (pci_enable_device(dev->pdev))
104                 return -1;
105         pci_set_master(dev->pdev);
106
107         i915_restore_state(dev);
108
109         intel_opregion_init(dev, 1);
110
111         /* KMS EnterVT equivalent */
112         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
113                 mutex_lock(&dev->struct_mutex);
114                 dev_priv->mm.suspended = 0;
115
116                 ret = i915_gem_init_ringbuffer(dev);
117                 if (ret != 0)
118                         ret = -1;
119                 mutex_unlock(&dev->struct_mutex);
120
121                 drm_irq_install(dev);
122         }
123         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
124                 /* Resume the modeset for every activated CRTC */
125                 drm_helper_resume_force_mode(dev);
126         }
127
128         dev_priv->modeset_on_lid = 0;
129
130         return ret;
131 }
132
133 /**
134  * i965_reset - reset chip after a hang
135  * @dev: drm device to reset
136  * @flags: reset domains
137  *
138  * Reset the chip.  Useful if a hang is detected. Returns zero on successful
139  * reset or otherwise an error code.
140  *
141  * Procedure is fairly simple:
142  *   - reset the chip using the reset reg
143  *   - re-init context state
144  *   - re-init hardware status page
145  *   - re-init ring buffer
146  *   - re-init interrupt state
147  *   - re-init display
148  */
149 int i965_reset(struct drm_device *dev, u8 flags)
150 {
151         drm_i915_private_t *dev_priv = dev->dev_private;
152         unsigned long timeout;
153         u8 gdrst;
154         /*
155          * We really should only reset the display subsystem if we actually
156          * need to
157          */
158         bool need_display = true;
159
160         mutex_lock(&dev->struct_mutex);
161
162         /*
163          * Clear request list
164          */
165         i915_gem_retire_requests(dev);
166
167         if (need_display)
168                 i915_save_display(dev);
169
170         if (IS_I965G(dev) || IS_G4X(dev)) {
171                 /*
172                  * Set the domains we want to reset, then the reset bit (bit 0).
173                  * Clear the reset bit after a while and wait for hardware status
174                  * bit (bit 1) to be set
175                  */
176                 pci_read_config_byte(dev->pdev, GDRST, &gdrst);
177                 pci_write_config_byte(dev->pdev, GDRST, gdrst | flags | ((flags == GDRST_FULL) ? 0x1 : 0x0));
178                 udelay(50);
179                 pci_write_config_byte(dev->pdev, GDRST, gdrst & 0xfe);
180
181                 /* ...we don't want to loop forever though, 500ms should be plenty */
182                timeout = jiffies + msecs_to_jiffies(500);
183                 do {
184                         udelay(100);
185                         pci_read_config_byte(dev->pdev, GDRST, &gdrst);
186                 } while ((gdrst & 0x1) && time_after(timeout, jiffies));
187
188                 if (gdrst & 0x1) {
189                         WARN(true, "i915: Failed to reset chip\n");
190                         mutex_unlock(&dev->struct_mutex);
191                         return -EIO;
192                 }
193         } else {
194                 DRM_ERROR("Error occurred. Don't know how to reset this chip.\n");
195                 return -ENODEV;
196         }
197
198         /* Ok, now get things going again... */
199
200         /*
201          * Everything depends on having the GTT running, so we need to start
202          * there.  Fortunately we don't need to do this unless we reset the
203          * chip at a PCI level.
204          *
205          * Next we need to restore the context, but we don't use those
206          * yet either...
207          *
208          * Ring buffer needs to be re-initialized in the KMS case, or if X
209          * was running at the time of the reset (i.e. we weren't VT
210          * switched away).
211          */
212         if (drm_core_check_feature(dev, DRIVER_MODESET) ||
213             !dev_priv->mm.suspended) {
214                 drm_i915_ring_buffer_t *ring = &dev_priv->ring;
215                 struct drm_gem_object *obj = ring->ring_obj;
216                 struct drm_i915_gem_object *obj_priv = obj->driver_private;
217                 dev_priv->mm.suspended = 0;
218
219                 /* Stop the ring if it's running. */
220                 I915_WRITE(PRB0_CTL, 0);
221                 I915_WRITE(PRB0_TAIL, 0);
222                 I915_WRITE(PRB0_HEAD, 0);
223
224                 /* Initialize the ring. */
225                 I915_WRITE(PRB0_START, obj_priv->gtt_offset);
226                 I915_WRITE(PRB0_CTL,
227                            ((obj->size - 4096) & RING_NR_PAGES) |
228                            RING_NO_REPORT |
229                            RING_VALID);
230                 if (!drm_core_check_feature(dev, DRIVER_MODESET))
231                         i915_kernel_lost_context(dev);
232                 else {
233                         ring->head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
234                         ring->tail = I915_READ(PRB0_TAIL) & TAIL_ADDR;
235                         ring->space = ring->head - (ring->tail + 8);
236                         if (ring->space < 0)
237                                 ring->space += ring->Size;
238                 }
239
240                 mutex_unlock(&dev->struct_mutex);
241                 drm_irq_uninstall(dev);
242                 drm_irq_install(dev);
243                 mutex_lock(&dev->struct_mutex);
244         }
245
246         /*
247          * Display needs restore too...
248          */
249         if (need_display)
250                 i915_restore_display(dev);
251
252         mutex_unlock(&dev->struct_mutex);
253         return 0;
254 }
255
256
257 static int __devinit
258 i915_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
259 {
260         return drm_get_dev(pdev, ent, &driver);
261 }
262
263 static void
264 i915_pci_remove(struct pci_dev *pdev)
265 {
266         struct drm_device *dev = pci_get_drvdata(pdev);
267
268         drm_put_dev(dev);
269 }
270
271 static int
272 i915_pci_suspend(struct pci_dev *pdev, pm_message_t state)
273 {
274         struct drm_device *dev = pci_get_drvdata(pdev);
275
276         return i915_suspend(dev, state);
277 }
278
279 static int
280 i915_pci_resume(struct pci_dev *pdev)
281 {
282         struct drm_device *dev = pci_get_drvdata(pdev);
283
284         return i915_resume(dev);
285 }
286
287 static struct vm_operations_struct i915_gem_vm_ops = {
288         .fault = i915_gem_fault,
289         .open = drm_gem_vm_open,
290         .close = drm_gem_vm_close,
291 };
292
293 static struct drm_driver driver = {
294         /* don't use mtrr's here, the Xserver or user space app should
295          * deal with them for intel hardware.
296          */
297         .driver_features =
298             DRIVER_USE_AGP | DRIVER_REQUIRE_AGP | /* DRIVER_USE_MTRR |*/
299             DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED | DRIVER_GEM,
300         .load = i915_driver_load,
301         .unload = i915_driver_unload,
302         .open = i915_driver_open,
303         .lastclose = i915_driver_lastclose,
304         .preclose = i915_driver_preclose,
305         .postclose = i915_driver_postclose,
306         .suspend = i915_suspend,
307         .resume = i915_resume,
308         .device_is_agp = i915_driver_device_is_agp,
309         .enable_vblank = i915_enable_vblank,
310         .disable_vblank = i915_disable_vblank,
311         .irq_preinstall = i915_driver_irq_preinstall,
312         .irq_postinstall = i915_driver_irq_postinstall,
313         .irq_uninstall = i915_driver_irq_uninstall,
314         .irq_handler = i915_driver_irq_handler,
315         .reclaim_buffers = drm_core_reclaim_buffers,
316         .get_map_ofs = drm_core_get_map_ofs,
317         .get_reg_ofs = drm_core_get_reg_ofs,
318         .master_create = i915_master_create,
319         .master_destroy = i915_master_destroy,
320 #if defined(CONFIG_DEBUG_FS)
321         .debugfs_init = i915_debugfs_init,
322         .debugfs_cleanup = i915_debugfs_cleanup,
323 #endif
324         .gem_init_object = i915_gem_init_object,
325         .gem_free_object = i915_gem_free_object,
326         .gem_vm_ops = &i915_gem_vm_ops,
327         .ioctls = i915_ioctls,
328         .fops = {
329                  .owner = THIS_MODULE,
330                  .open = drm_open,
331                  .release = drm_release,
332                  .ioctl = drm_ioctl,
333                  .mmap = drm_gem_mmap,
334                  .poll = drm_poll,
335                  .fasync = drm_fasync,
336 #ifdef CONFIG_COMPAT
337                  .compat_ioctl = i915_compat_ioctl,
338 #endif
339         },
340
341         .pci_driver = {
342                  .name = DRIVER_NAME,
343                  .id_table = pciidlist,
344                  .probe = i915_pci_probe,
345                  .remove = i915_pci_remove,
346 #ifdef CONFIG_PM
347                  .resume = i915_pci_resume,
348                  .suspend = i915_pci_suspend,
349 #endif
350         },
351
352         .name = DRIVER_NAME,
353         .desc = DRIVER_DESC,
354         .date = DRIVER_DATE,
355         .major = DRIVER_MAJOR,
356         .minor = DRIVER_MINOR,
357         .patchlevel = DRIVER_PATCHLEVEL,
358 };
359
360 static int __init i915_init(void)
361 {
362         driver.num_ioctls = i915_max_ioctl;
363
364         i915_gem_shrinker_init();
365
366         /*
367          * If CONFIG_DRM_I915_KMS is set, default to KMS unless
368          * explicitly disabled with the module pararmeter.
369          *
370          * Otherwise, just follow the parameter (defaulting to off).
371          *
372          * Allow optional vga_text_mode_force boot option to override
373          * the default behavior.
374          */
375 #if defined(CONFIG_DRM_I915_KMS)
376         if (i915_modeset != 0)
377                 driver.driver_features |= DRIVER_MODESET;
378 #endif
379         if (i915_modeset == 1)
380                 driver.driver_features |= DRIVER_MODESET;
381
382 #ifdef CONFIG_VGA_CONSOLE
383         if (vgacon_text_force() && i915_modeset == -1)
384                 driver.driver_features &= ~DRIVER_MODESET;
385 #endif
386
387         return drm_init(&driver);
388 }
389
390 static void __exit i915_exit(void)
391 {
392         i915_gem_shrinker_exit();
393         drm_exit(&driver);
394 }
395
396 module_init(i915_init);
397 module_exit(i915_exit);
398
399 MODULE_AUTHOR(DRIVER_AUTHOR);
400 MODULE_DESCRIPTION(DRIVER_DESC);
401 MODULE_LICENSE("GPL and additional rights");