1 /* i915_drv.c -- i830,i845,i855,i865,i915 driver -*- linux-c -*-
5 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
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:
16 * The above copyright notice and this permission notice (including the
17 * next paragraph) shall be included in all copies or substantial portions
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.
30 #include <linux/device.h>
36 #include "drm_pciids.h"
37 #include <linux/console.h>
38 #include "drm_crtc_helper.h"
40 static int i915_modeset = -1;
41 module_param_named(modeset, i915_modeset, int, 0400);
43 unsigned int i915_fbpercrtc = 0;
44 module_param_named(fbpercrtc, i915_fbpercrtc, int, 0400);
46 unsigned int i915_powersave = 1;
47 module_param_named(powersave, i915_powersave, int, 0400);
49 static struct drm_driver driver;
51 static struct pci_device_id pciidlist[] = {
55 #if defined(CONFIG_DRM_I915_KMS)
56 MODULE_DEVICE_TABLE(pci, pciidlist);
59 static int i915_suspend(struct drm_device *dev, pm_message_t state)
61 struct drm_i915_private *dev_priv = dev->dev_private;
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");
69 if (state.event == PM_EVENT_PRETHAW)
72 pci_save_state(dev->pdev);
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);
84 intel_opregion_free(dev, 1);
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);
95 static int i915_resume(struct drm_device *dev)
97 struct drm_i915_private *dev_priv = dev->dev_private;
100 pci_set_power_state(dev->pdev, PCI_D0);
101 pci_restore_state(dev->pdev);
102 if (pci_enable_device(dev->pdev))
104 pci_set_master(dev->pdev);
106 i915_restore_state(dev);
108 intel_opregion_init(dev, 1);
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;
115 ret = i915_gem_init_ringbuffer(dev);
118 mutex_unlock(&dev->struct_mutex);
120 drm_irq_install(dev);
122 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
123 /* Resume the modeset for every activated CRTC */
124 drm_helper_resume_force_mode(dev);
131 * i965_reset - reset chip after a hang
132 * @dev: drm device to reset
133 * @flags: reset domains
135 * Reset the chip. Useful if a hang is detected. Returns zero on successful
136 * reset or otherwise an error code.
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
146 int i965_reset(struct drm_device *dev, u8 flags)
148 drm_i915_private_t *dev_priv = dev->dev_private;
149 unsigned long timeout;
152 * We really should only reset the display subsystem if we actually
155 bool need_display = true;
157 mutex_lock(&dev->struct_mutex);
162 i915_gem_retire_requests(dev);
165 i915_save_display(dev);
167 if (IS_I965G(dev) || IS_G4X(dev)) {
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
173 pci_read_config_byte(dev->pdev, GDRST, &gdrst);
174 pci_write_config_byte(dev->pdev, GDRST, gdrst | flags | ((flags == GDRST_FULL) ? 0x1 : 0x0));
176 pci_write_config_byte(dev->pdev, GDRST, gdrst & 0xfe);
178 /* ...we don't want to loop forever though, 500ms should be plenty */
179 timeout = jiffies + msecs_to_jiffies(500);
182 pci_read_config_byte(dev->pdev, GDRST, &gdrst);
183 } while ((gdrst & 0x1) && time_after(timeout, jiffies));
186 WARN(true, "i915: Failed to reset chip\n");
187 mutex_unlock(&dev->struct_mutex);
191 DRM_ERROR("Error occurred. Don't know how to reset this chip.\n");
195 /* Ok, now get things going again... */
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.
202 * Next we need to restore the context, but we don't use those
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
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;
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);
221 /* Initialize the ring. */
222 I915_WRITE(PRB0_START, obj_priv->gtt_offset);
224 ((obj->size - 4096) & RING_NR_PAGES) |
227 if (!drm_core_check_feature(dev, DRIVER_MODESET))
228 i915_kernel_lost_context(dev);
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);
234 ring->space += ring->Size;
237 mutex_unlock(&dev->struct_mutex);
238 drm_irq_uninstall(dev);
239 drm_irq_install(dev);
240 mutex_lock(&dev->struct_mutex);
244 * Display needs restore too...
247 i915_restore_display(dev);
249 mutex_unlock(&dev->struct_mutex);
255 i915_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
257 return drm_get_dev(pdev, ent, &driver);
261 i915_pci_remove(struct pci_dev *pdev)
263 struct drm_device *dev = pci_get_drvdata(pdev);
269 i915_pci_suspend(struct pci_dev *pdev, pm_message_t state)
271 struct drm_device *dev = pci_get_drvdata(pdev);
273 return i915_suspend(dev, state);
277 i915_pci_resume(struct pci_dev *pdev)
279 struct drm_device *dev = pci_get_drvdata(pdev);
281 return i915_resume(dev);
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,
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.
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,
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,
326 .owner = THIS_MODULE,
328 .release = drm_release,
330 .mmap = drm_gem_mmap,
332 .fasync = drm_fasync,
334 .compat_ioctl = i915_compat_ioctl,
340 .id_table = pciidlist,
341 .probe = i915_pci_probe,
342 .remove = i915_pci_remove,
344 .resume = i915_pci_resume,
345 .suspend = i915_pci_suspend,
352 .major = DRIVER_MAJOR,
353 .minor = DRIVER_MINOR,
354 .patchlevel = DRIVER_PATCHLEVEL,
357 static int __init i915_init(void)
359 driver.num_ioctls = i915_max_ioctl;
362 * If CONFIG_DRM_I915_KMS is set, default to KMS unless
363 * explicitly disabled with the module pararmeter.
365 * Otherwise, just follow the parameter (defaulting to off).
367 * Allow optional vga_text_mode_force boot option to override
368 * the default behavior.
370 #if defined(CONFIG_DRM_I915_KMS)
371 if (i915_modeset != 0)
372 driver.driver_features |= DRIVER_MODESET;
374 if (i915_modeset == 1)
375 driver.driver_features |= DRIVER_MODESET;
377 #ifdef CONFIG_VGA_CONSOLE
378 if (vgacon_text_force() && i915_modeset == -1)
379 driver.driver_features &= ~DRIVER_MODESET;
382 return drm_init(&driver);
385 static void __exit i915_exit(void)
390 module_init(i915_init);
391 module_exit(i915_exit);
393 MODULE_AUTHOR(DRIVER_AUTHOR);
394 MODULE_DESCRIPTION(DRIVER_DESC);
395 MODULE_LICENSE("GPL and additional rights");