blob: b8db9652e9ddf2d2bfde64bafd1343c2552fb232 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* i915_dma.c -- DMA support for the I915 -*- linux-c -*-
2 */
Dave Airlie0d6aa602006-01-02 20:14:23 +11003/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
5 * All Rights Reserved.
Dave Airliebc54fd12005-06-23 22:46:46 +10006 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sub license, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
14 *
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
17 * of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
22 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 *
Dave Airlie0d6aa602006-01-02 20:14:23 +110027 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070028
29#include "drmP.h"
30#include "drm.h"
31#include "i915_drm.h"
32#include "i915_drv.h"
33
Linus Torvalds1da177e2005-04-16 15:20:36 -070034/* Really want an OS-independent resettable timer. Would like to have
35 * this loop run for (eg) 3 sec, but have the timer reset every time
36 * the head pointer changes, so that EBUSY only happens if the ring
37 * actually stalls for (eg) 3 seconds.
38 */
Dave Airlie84b1fd12007-07-11 15:53:27 +100039int i915_wait_ring(struct drm_device * dev, int n, const char *caller)
Linus Torvalds1da177e2005-04-16 15:20:36 -070040{
41 drm_i915_private_t *dev_priv = dev->dev_private;
42 drm_i915_ring_buffer_t *ring = &(dev_priv->ring);
43 u32 last_head = I915_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
44 int i;
45
46 for (i = 0; i < 10000; i++) {
47 ring->head = I915_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
48 ring->space = ring->head - (ring->tail + 8);
49 if (ring->space < 0)
50 ring->space += ring->Size;
51 if (ring->space >= n)
52 return 0;
53
54 dev_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT;
55
56 if (ring->head != last_head)
57 i = 0;
58
59 last_head = ring->head;
60 }
61
Eric Anholt20caafa2007-08-25 19:22:43 +100062 return -EBUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -070063}
64
Dave Airlie84b1fd12007-07-11 15:53:27 +100065void i915_kernel_lost_context(struct drm_device * dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070066{
67 drm_i915_private_t *dev_priv = dev->dev_private;
68 drm_i915_ring_buffer_t *ring = &(dev_priv->ring);
69
70 ring->head = I915_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
71 ring->tail = I915_READ(LP_RING + RING_TAIL) & TAIL_ADDR;
72 ring->space = ring->head - (ring->tail + 8);
73 if (ring->space < 0)
74 ring->space += ring->Size;
75
76 if (ring->head == ring->tail)
77 dev_priv->sarea_priv->perf_boxes |= I915_BOX_RING_EMPTY;
78}
79
Dave Airlie84b1fd12007-07-11 15:53:27 +100080static int i915_dma_cleanup(struct drm_device * dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070081{
Jesse Barnesba8bbcf2007-11-22 14:14:14 +100082 drm_i915_private_t *dev_priv = dev->dev_private;
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 /* Make sure interrupts are disabled here because the uninstall ioctl
84 * may not have been called from userspace and after dev_private
85 * is freed, it's too late.
86 */
87 if (dev->irq)
Dave Airlieb5e89ed2005-09-25 14:28:13 +100088 drm_irq_uninstall(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070089
Jesse Barnesba8bbcf2007-11-22 14:14:14 +100090 if (dev_priv->ring.virtual_start) {
91 drm_core_ioremapfree(&dev_priv->ring.map, dev);
92 dev_priv->ring.virtual_start = 0;
93 dev_priv->ring.map.handle = 0;
94 dev_priv->ring.map.size = 0;
95 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070096
Jesse Barnesba8bbcf2007-11-22 14:14:14 +100097 if (dev_priv->status_page_dmah) {
98 drm_pci_free(dev, dev_priv->status_page_dmah);
99 dev_priv->status_page_dmah = NULL;
100 /* Need to rewrite hardware status page */
101 I915_WRITE(0x02080, 0x1ffff000);
102 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103
Jesse Barnesba8bbcf2007-11-22 14:14:14 +1000104 if (dev_priv->status_gfx_addr) {
105 dev_priv->status_gfx_addr = 0;
106 drm_core_ioremapfree(&dev_priv->hws_map, dev);
107 I915_WRITE(0x2080, 0x1ffff000);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 }
109
110 return 0;
111}
112
Jesse Barnesba8bbcf2007-11-22 14:14:14 +1000113static int i915_initialize(struct drm_device * dev, drm_i915_init_t * init)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114{
Jesse Barnesba8bbcf2007-11-22 14:14:14 +1000115 drm_i915_private_t *dev_priv = dev->dev_private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116
Dave Airlieda509d72007-05-26 05:04:51 +1000117 dev_priv->sarea = drm_getsarea(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 if (!dev_priv->sarea) {
119 DRM_ERROR("can not find sarea!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 i915_dma_cleanup(dev);
Eric Anholt20caafa2007-08-25 19:22:43 +1000121 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 }
123
124 dev_priv->mmio_map = drm_core_findmap(dev, init->mmio_offset);
125 if (!dev_priv->mmio_map) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126 i915_dma_cleanup(dev);
127 DRM_ERROR("can not find mmio map!\n");
Eric Anholt20caafa2007-08-25 19:22:43 +1000128 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 }
130
131 dev_priv->sarea_priv = (drm_i915_sarea_t *)
132 ((u8 *) dev_priv->sarea->handle + init->sarea_priv_offset);
133
134 dev_priv->ring.Start = init->ring_start;
135 dev_priv->ring.End = init->ring_end;
136 dev_priv->ring.Size = init->ring_size;
137 dev_priv->ring.tail_mask = dev_priv->ring.Size - 1;
138
139 dev_priv->ring.map.offset = init->ring_start;
140 dev_priv->ring.map.size = init->ring_size;
141 dev_priv->ring.map.type = 0;
142 dev_priv->ring.map.flags = 0;
143 dev_priv->ring.map.mtrr = 0;
144
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000145 drm_core_ioremap(&dev_priv->ring.map, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146
147 if (dev_priv->ring.map.handle == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 i915_dma_cleanup(dev);
149 DRM_ERROR("can not ioremap virtual address for"
150 " ring buffer\n");
Eric Anholt20caafa2007-08-25 19:22:43 +1000151 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 }
153
154 dev_priv->ring.virtual_start = dev_priv->ring.map.handle;
155
=?utf-8?q?Michel_D=C3=A4nzer?=a6b54f32006-10-24 23:37:43 +1000156 dev_priv->cpp = init->cpp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157 dev_priv->back_offset = init->back_offset;
158 dev_priv->front_offset = init->front_offset;
159 dev_priv->current_page = 0;
160 dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
161
162 /* We are using separate values as placeholders for mechanisms for
163 * private backbuffer/depthbuffer usage.
164 */
165 dev_priv->use_mi_batchbuffer_start = 0;
Dave Airlie21f16282007-08-07 09:09:51 +1000166 if (IS_I965G(dev)) /* 965 doesn't support older method */
167 dev_priv->use_mi_batchbuffer_start = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168
169 /* Allow hardware batchbuffers unless told otherwise.
170 */
171 dev_priv->allow_batchbuffer = 1;
172
173 /* Program Hardware Status Page */
Wang Zhenyudc7a9312007-06-10 15:58:19 +1000174 if (!IS_G33(dev)) {
175 dev_priv->status_page_dmah =
176 drm_pci_alloc(dev, PAGE_SIZE, PAGE_SIZE, 0xffffffff);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177
Wang Zhenyudc7a9312007-06-10 15:58:19 +1000178 if (!dev_priv->status_page_dmah) {
Wang Zhenyudc7a9312007-06-10 15:58:19 +1000179 i915_dma_cleanup(dev);
180 DRM_ERROR("Can not allocate hardware status page\n");
Eric Anholt20caafa2007-08-25 19:22:43 +1000181 return -ENOMEM;
Wang Zhenyudc7a9312007-06-10 15:58:19 +1000182 }
183 dev_priv->hw_status_page = dev_priv->status_page_dmah->vaddr;
184 dev_priv->dma_status_page = dev_priv->status_page_dmah->busaddr;
185
186 memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
187 I915_WRITE(0x02080, dev_priv->dma_status_page);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 DRM_DEBUG("Enabled hardware status page\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 return 0;
191}
192
Dave Airlie84b1fd12007-07-11 15:53:27 +1000193static int i915_dma_resume(struct drm_device * dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194{
195 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
196
197 DRM_DEBUG("%s\n", __FUNCTION__);
198
199 if (!dev_priv->sarea) {
200 DRM_ERROR("can not find sarea!\n");
Eric Anholt20caafa2007-08-25 19:22:43 +1000201 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202 }
203
204 if (!dev_priv->mmio_map) {
205 DRM_ERROR("can not find mmio map!\n");
Eric Anholt20caafa2007-08-25 19:22:43 +1000206 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 }
208
209 if (dev_priv->ring.map.handle == NULL) {
210 DRM_ERROR("can not ioremap virtual address for"
211 " ring buffer\n");
Eric Anholt20caafa2007-08-25 19:22:43 +1000212 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 }
214
215 /* Program Hardware Status Page */
216 if (!dev_priv->hw_status_page) {
217 DRM_ERROR("Can not find hardware status page\n");
Eric Anholt20caafa2007-08-25 19:22:43 +1000218 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 }
220 DRM_DEBUG("hw status page @ %p\n", dev_priv->hw_status_page);
221
Wang Zhenyudc7a9312007-06-10 15:58:19 +1000222 if (dev_priv->status_gfx_addr != 0)
223 I915_WRITE(0x02080, dev_priv->status_gfx_addr);
224 else
225 I915_WRITE(0x02080, dev_priv->dma_status_page);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 DRM_DEBUG("Enabled hardware status page\n");
227
228 return 0;
229}
230
Eric Anholtc153f452007-09-03 12:06:45 +1000231static int i915_dma_init(struct drm_device *dev, void *data,
232 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233{
Eric Anholtc153f452007-09-03 12:06:45 +1000234 drm_i915_init_t *init = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 int retcode = 0;
236
Eric Anholtc153f452007-09-03 12:06:45 +1000237 switch (init->func) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 case I915_INIT_DMA:
Jesse Barnesba8bbcf2007-11-22 14:14:14 +1000239 retcode = i915_initialize(dev, init);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 break;
241 case I915_CLEANUP_DMA:
242 retcode = i915_dma_cleanup(dev);
243 break;
244 case I915_RESUME_DMA:
Dave Airlie0d6aa602006-01-02 20:14:23 +1100245 retcode = i915_dma_resume(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 break;
247 default:
Eric Anholt20caafa2007-08-25 19:22:43 +1000248 retcode = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 break;
250 }
251
252 return retcode;
253}
254
255/* Implement basically the same security restrictions as hardware does
256 * for MI_BATCH_NON_SECURE. These can be made stricter at any time.
257 *
258 * Most of the calculations below involve calculating the size of a
259 * particular instruction. It's important to get the size right as
260 * that tells us where the next instruction to check is. Any illegal
261 * instruction detected will be given a size of zero, which is a
262 * signal to abort the rest of the buffer.
263 */
264static int do_validate_cmd(int cmd)
265{
266 switch (((cmd >> 29) & 0x7)) {
267 case 0x0:
268 switch ((cmd >> 23) & 0x3f) {
269 case 0x0:
270 return 1; /* MI_NOOP */
271 case 0x4:
272 return 1; /* MI_FLUSH */
273 default:
274 return 0; /* disallow everything else */
275 }
276 break;
277 case 0x1:
278 return 0; /* reserved */
279 case 0x2:
280 return (cmd & 0xff) + 2; /* 2d commands */
281 case 0x3:
282 if (((cmd >> 24) & 0x1f) <= 0x18)
283 return 1;
284
285 switch ((cmd >> 24) & 0x1f) {
286 case 0x1c:
287 return 1;
288 case 0x1d:
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000289 switch ((cmd >> 16) & 0xff) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 case 0x3:
291 return (cmd & 0x1f) + 2;
292 case 0x4:
293 return (cmd & 0xf) + 2;
294 default:
295 return (cmd & 0xffff) + 2;
296 }
297 case 0x1e:
298 if (cmd & (1 << 23))
299 return (cmd & 0xffff) + 1;
300 else
301 return 1;
302 case 0x1f:
303 if ((cmd & (1 << 23)) == 0) /* inline vertices */
304 return (cmd & 0x1ffff) + 2;
305 else if (cmd & (1 << 17)) /* indirect random */
306 if ((cmd & 0xffff) == 0)
307 return 0; /* unknown length, too hard */
308 else
309 return (((cmd & 0xffff) + 1) / 2) + 1;
310 else
311 return 2; /* indirect sequential */
312 default:
313 return 0;
314 }
315 default:
316 return 0;
317 }
318
319 return 0;
320}
321
322static int validate_cmd(int cmd)
323{
324 int ret = do_validate_cmd(cmd);
325
Dave Airliebc5f4522007-11-05 12:50:58 +1000326/* printk("validate_cmd( %x ): %d\n", cmd, ret); */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327
328 return ret;
329}
330
Dave Airlie84b1fd12007-07-11 15:53:27 +1000331static int i915_emit_cmds(struct drm_device * dev, int __user * buffer, int dwords)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332{
333 drm_i915_private_t *dev_priv = dev->dev_private;
334 int i;
335 RING_LOCALS;
336
Dave Airliede227f52006-01-25 15:31:43 +1100337 if ((dwords+1) * sizeof(int) >= dev_priv->ring.Size - 8)
Eric Anholt20caafa2007-08-25 19:22:43 +1000338 return -EINVAL;
Dave Airliede227f52006-01-25 15:31:43 +1100339
Alan Hourihanec29b6692006-08-12 16:29:24 +1000340 BEGIN_LP_RING((dwords+1)&~1);
Dave Airliede227f52006-01-25 15:31:43 +1100341
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 for (i = 0; i < dwords;) {
343 int cmd, sz;
344
345 if (DRM_COPY_FROM_USER_UNCHECKED(&cmd, &buffer[i], sizeof(cmd)))
Eric Anholt20caafa2007-08-25 19:22:43 +1000346 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 if ((sz = validate_cmd(cmd)) == 0 || i + sz > dwords)
Eric Anholt20caafa2007-08-25 19:22:43 +1000349 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 OUT_RING(cmd);
352
353 while (++i, --sz) {
354 if (DRM_COPY_FROM_USER_UNCHECKED(&cmd, &buffer[i],
355 sizeof(cmd))) {
Eric Anholt20caafa2007-08-25 19:22:43 +1000356 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357 }
358 OUT_RING(cmd);
359 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 }
361
Dave Airliede227f52006-01-25 15:31:43 +1100362 if (dwords & 1)
363 OUT_RING(0);
364
365 ADVANCE_LP_RING();
366
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367 return 0;
368}
369
Dave Airlie84b1fd12007-07-11 15:53:27 +1000370static int i915_emit_box(struct drm_device * dev,
Dave Airliec60ce622007-07-11 15:27:12 +1000371 struct drm_clip_rect __user * boxes,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372 int i, int DR1, int DR4)
373{
374 drm_i915_private_t *dev_priv = dev->dev_private;
Dave Airliec60ce622007-07-11 15:27:12 +1000375 struct drm_clip_rect box;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 RING_LOCALS;
377
378 if (DRM_COPY_FROM_USER_UNCHECKED(&box, &boxes[i], sizeof(box))) {
Eric Anholt20caafa2007-08-25 19:22:43 +1000379 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380 }
381
382 if (box.y2 <= box.y1 || box.x2 <= box.x1 || box.y2 <= 0 || box.x2 <= 0) {
383 DRM_ERROR("Bad box %d,%d..%d,%d\n",
384 box.x1, box.y1, box.x2, box.y2);
Eric Anholt20caafa2007-08-25 19:22:43 +1000385 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 }
387
Alan Hourihanec29b6692006-08-12 16:29:24 +1000388 if (IS_I965G(dev)) {
389 BEGIN_LP_RING(4);
390 OUT_RING(GFX_OP_DRAWRECT_INFO_I965);
391 OUT_RING((box.x1 & 0xffff) | (box.y1 << 16));
Andrew Morton78eca432006-08-16 09:15:51 +1000392 OUT_RING(((box.x2 - 1) & 0xffff) | ((box.y2 - 1) << 16));
Alan Hourihanec29b6692006-08-12 16:29:24 +1000393 OUT_RING(DR4);
394 ADVANCE_LP_RING();
395 } else {
396 BEGIN_LP_RING(6);
397 OUT_RING(GFX_OP_DRAWRECT_INFO);
398 OUT_RING(DR1);
399 OUT_RING((box.x1 & 0xffff) | (box.y1 << 16));
400 OUT_RING(((box.x2 - 1) & 0xffff) | ((box.y2 - 1) << 16));
401 OUT_RING(DR4);
402 OUT_RING(0);
403 ADVANCE_LP_RING();
404 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405
406 return 0;
407}
408
Alan Hourihanec29b6692006-08-12 16:29:24 +1000409/* XXX: Emitting the counter should really be moved to part of the IRQ
410 * emit. For now, do it in both places:
411 */
412
Dave Airlie84b1fd12007-07-11 15:53:27 +1000413static void i915_emit_breadcrumb(struct drm_device *dev)
Dave Airliede227f52006-01-25 15:31:43 +1100414{
415 drm_i915_private_t *dev_priv = dev->dev_private;
416 RING_LOCALS;
417
Alan Hourihanec29b6692006-08-12 16:29:24 +1000418 dev_priv->sarea_priv->last_enqueue = ++dev_priv->counter;
419
420 if (dev_priv->counter > 0x7FFFFFFFUL)
421 dev_priv->sarea_priv->last_enqueue = dev_priv->counter = 1;
Dave Airliede227f52006-01-25 15:31:43 +1100422
423 BEGIN_LP_RING(4);
424 OUT_RING(CMD_STORE_DWORD_IDX);
425 OUT_RING(20);
426 OUT_RING(dev_priv->counter);
427 OUT_RING(0);
428 ADVANCE_LP_RING();
429}
430
Dave Airlie84b1fd12007-07-11 15:53:27 +1000431static int i915_dispatch_cmdbuffer(struct drm_device * dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 drm_i915_cmdbuffer_t * cmd)
433{
434 int nbox = cmd->num_cliprects;
435 int i = 0, count, ret;
436
437 if (cmd->sz & 0x3) {
438 DRM_ERROR("alignment");
Eric Anholt20caafa2007-08-25 19:22:43 +1000439 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 }
441
442 i915_kernel_lost_context(dev);
443
444 count = nbox ? nbox : 1;
445
446 for (i = 0; i < count; i++) {
447 if (i < nbox) {
448 ret = i915_emit_box(dev, cmd->cliprects, i,
449 cmd->DR1, cmd->DR4);
450 if (ret)
451 return ret;
452 }
453
454 ret = i915_emit_cmds(dev, (int __user *)cmd->buf, cmd->sz / 4);
455 if (ret)
456 return ret;
457 }
458
Dave Airliede227f52006-01-25 15:31:43 +1100459 i915_emit_breadcrumb(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460 return 0;
461}
462
Dave Airlie84b1fd12007-07-11 15:53:27 +1000463static int i915_dispatch_batchbuffer(struct drm_device * dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464 drm_i915_batchbuffer_t * batch)
465{
466 drm_i915_private_t *dev_priv = dev->dev_private;
Dave Airliec60ce622007-07-11 15:27:12 +1000467 struct drm_clip_rect __user *boxes = batch->cliprects;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468 int nbox = batch->num_cliprects;
469 int i = 0, count;
470 RING_LOCALS;
471
472 if ((batch->start | batch->used) & 0x7) {
473 DRM_ERROR("alignment");
Eric Anholt20caafa2007-08-25 19:22:43 +1000474 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475 }
476
477 i915_kernel_lost_context(dev);
478
479 count = nbox ? nbox : 1;
480
481 for (i = 0; i < count; i++) {
482 if (i < nbox) {
483 int ret = i915_emit_box(dev, boxes, i,
484 batch->DR1, batch->DR4);
485 if (ret)
486 return ret;
487 }
488
489 if (dev_priv->use_mi_batchbuffer_start) {
490 BEGIN_LP_RING(2);
Dave Airlie21f16282007-08-07 09:09:51 +1000491 if (IS_I965G(dev)) {
492 OUT_RING(MI_BATCH_BUFFER_START | (2 << 6) | MI_BATCH_NON_SECURE_I965);
493 OUT_RING(batch->start);
494 } else {
495 OUT_RING(MI_BATCH_BUFFER_START | (2 << 6));
496 OUT_RING(batch->start | MI_BATCH_NON_SECURE);
497 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 ADVANCE_LP_RING();
499 } else {
500 BEGIN_LP_RING(4);
501 OUT_RING(MI_BATCH_BUFFER);
502 OUT_RING(batch->start | MI_BATCH_NON_SECURE);
503 OUT_RING(batch->start + batch->used - 4);
504 OUT_RING(0);
505 ADVANCE_LP_RING();
506 }
507 }
508
Dave Airliede227f52006-01-25 15:31:43 +1100509 i915_emit_breadcrumb(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510
511 return 0;
512}
513
Dave Airlie84b1fd12007-07-11 15:53:27 +1000514static int i915_dispatch_flip(struct drm_device * dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515{
516 drm_i915_private_t *dev_priv = dev->dev_private;
517 RING_LOCALS;
518
519 DRM_DEBUG("%s: page=%d pfCurrentPage=%d\n",
520 __FUNCTION__,
521 dev_priv->current_page,
522 dev_priv->sarea_priv->pf_current_page);
523
524 i915_kernel_lost_context(dev);
525
526 BEGIN_LP_RING(2);
527 OUT_RING(INST_PARSER_CLIENT | INST_OP_FLUSH | INST_FLUSH_MAP_CACHE);
528 OUT_RING(0);
529 ADVANCE_LP_RING();
530
531 BEGIN_LP_RING(6);
532 OUT_RING(CMD_OP_DISPLAYBUFFER_INFO | ASYNC_FLIP);
533 OUT_RING(0);
534 if (dev_priv->current_page == 0) {
535 OUT_RING(dev_priv->back_offset);
536 dev_priv->current_page = 1;
537 } else {
538 OUT_RING(dev_priv->front_offset);
539 dev_priv->current_page = 0;
540 }
541 OUT_RING(0);
542 ADVANCE_LP_RING();
543
544 BEGIN_LP_RING(2);
545 OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_PLANE_A_FLIP);
546 OUT_RING(0);
547 ADVANCE_LP_RING();
548
549 dev_priv->sarea_priv->last_enqueue = dev_priv->counter++;
550
551 BEGIN_LP_RING(4);
552 OUT_RING(CMD_STORE_DWORD_IDX);
553 OUT_RING(20);
554 OUT_RING(dev_priv->counter);
555 OUT_RING(0);
556 ADVANCE_LP_RING();
557
558 dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
559 return 0;
560}
561
Dave Airlie84b1fd12007-07-11 15:53:27 +1000562static int i915_quiescent(struct drm_device * dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563{
564 drm_i915_private_t *dev_priv = dev->dev_private;
565
566 i915_kernel_lost_context(dev);
567 return i915_wait_ring(dev, dev_priv->ring.Size - 8, __FUNCTION__);
568}
569
Eric Anholtc153f452007-09-03 12:06:45 +1000570static int i915_flush_ioctl(struct drm_device *dev, void *data,
571 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572{
Eric Anholt6c340ea2007-08-25 20:23:09 +1000573 LOCK_TEST_WITH_RETURN(dev, file_priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574
575 return i915_quiescent(dev);
576}
577
Eric Anholtc153f452007-09-03 12:06:45 +1000578static int i915_batchbuffer(struct drm_device *dev, void *data,
579 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
582 u32 *hw_status = dev_priv->hw_status_page;
583 drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
584 dev_priv->sarea_priv;
Eric Anholtc153f452007-09-03 12:06:45 +1000585 drm_i915_batchbuffer_t *batch = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586 int ret;
587
588 if (!dev_priv->allow_batchbuffer) {
589 DRM_ERROR("Batchbuffer ioctl disabled\n");
Eric Anholt20caafa2007-08-25 19:22:43 +1000590 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591 }
592
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593 DRM_DEBUG("i915 batchbuffer, start %x used %d cliprects %d\n",
Eric Anholtc153f452007-09-03 12:06:45 +1000594 batch->start, batch->used, batch->num_cliprects);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595
Eric Anholt6c340ea2007-08-25 20:23:09 +1000596 LOCK_TEST_WITH_RETURN(dev, file_priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597
Eric Anholtc153f452007-09-03 12:06:45 +1000598 if (batch->num_cliprects && DRM_VERIFYAREA_READ(batch->cliprects,
599 batch->num_cliprects *
Dave Airliec60ce622007-07-11 15:27:12 +1000600 sizeof(struct drm_clip_rect)))
Eric Anholt20caafa2007-08-25 19:22:43 +1000601 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602
Eric Anholtc153f452007-09-03 12:06:45 +1000603 ret = i915_dispatch_batchbuffer(dev, batch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604
605 sarea_priv->last_dispatch = (int)hw_status[5];
606 return ret;
607}
608
Eric Anholtc153f452007-09-03 12:06:45 +1000609static int i915_cmdbuffer(struct drm_device *dev, void *data,
610 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
613 u32 *hw_status = dev_priv->hw_status_page;
614 drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
615 dev_priv->sarea_priv;
Eric Anholtc153f452007-09-03 12:06:45 +1000616 drm_i915_cmdbuffer_t *cmdbuf = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617 int ret;
618
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619 DRM_DEBUG("i915 cmdbuffer, buf %p sz %d cliprects %d\n",
Eric Anholtc153f452007-09-03 12:06:45 +1000620 cmdbuf->buf, cmdbuf->sz, cmdbuf->num_cliprects);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621
Eric Anholt6c340ea2007-08-25 20:23:09 +1000622 LOCK_TEST_WITH_RETURN(dev, file_priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623
Eric Anholtc153f452007-09-03 12:06:45 +1000624 if (cmdbuf->num_cliprects &&
625 DRM_VERIFYAREA_READ(cmdbuf->cliprects,
626 cmdbuf->num_cliprects *
Dave Airliec60ce622007-07-11 15:27:12 +1000627 sizeof(struct drm_clip_rect))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628 DRM_ERROR("Fault accessing cliprects\n");
Eric Anholt20caafa2007-08-25 19:22:43 +1000629 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630 }
631
Eric Anholtc153f452007-09-03 12:06:45 +1000632 ret = i915_dispatch_cmdbuffer(dev, cmdbuf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633 if (ret) {
634 DRM_ERROR("i915_dispatch_cmdbuffer failed\n");
635 return ret;
636 }
637
638 sarea_priv->last_dispatch = (int)hw_status[5];
639 return 0;
640}
641
Eric Anholtc153f452007-09-03 12:06:45 +1000642static int i915_flip_bufs(struct drm_device *dev, void *data,
643 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645 DRM_DEBUG("%s\n", __FUNCTION__);
646
Eric Anholt6c340ea2007-08-25 20:23:09 +1000647 LOCK_TEST_WITH_RETURN(dev, file_priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648
649 return i915_dispatch_flip(dev);
650}
651
Eric Anholtc153f452007-09-03 12:06:45 +1000652static int i915_getparam(struct drm_device *dev, void *data,
653 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 drm_i915_private_t *dev_priv = dev->dev_private;
Eric Anholtc153f452007-09-03 12:06:45 +1000656 drm_i915_getparam_t *param = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657 int value;
658
659 if (!dev_priv) {
660 DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
Eric Anholt20caafa2007-08-25 19:22:43 +1000661 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662 }
663
Eric Anholtc153f452007-09-03 12:06:45 +1000664 switch (param->param) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665 case I915_PARAM_IRQ_ACTIVE:
666 value = dev->irq ? 1 : 0;
667 break;
668 case I915_PARAM_ALLOW_BATCHBUFFER:
669 value = dev_priv->allow_batchbuffer ? 1 : 0;
670 break;
Dave Airlie0d6aa602006-01-02 20:14:23 +1100671 case I915_PARAM_LAST_DISPATCH:
672 value = READ_BREADCRUMB(dev_priv);
673 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674 default:
Eric Anholtc153f452007-09-03 12:06:45 +1000675 DRM_ERROR("Unknown parameter %d\n", param->param);
Eric Anholt20caafa2007-08-25 19:22:43 +1000676 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677 }
678
Eric Anholtc153f452007-09-03 12:06:45 +1000679 if (DRM_COPY_TO_USER(param->value, &value, sizeof(int))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680 DRM_ERROR("DRM_COPY_TO_USER failed\n");
Eric Anholt20caafa2007-08-25 19:22:43 +1000681 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682 }
683
684 return 0;
685}
686
Eric Anholtc153f452007-09-03 12:06:45 +1000687static int i915_setparam(struct drm_device *dev, void *data,
688 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690 drm_i915_private_t *dev_priv = dev->dev_private;
Eric Anholtc153f452007-09-03 12:06:45 +1000691 drm_i915_setparam_t *param = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692
693 if (!dev_priv) {
694 DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
Eric Anholt20caafa2007-08-25 19:22:43 +1000695 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696 }
697
Eric Anholtc153f452007-09-03 12:06:45 +1000698 switch (param->param) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699 case I915_SETPARAM_USE_MI_BATCHBUFFER_START:
Dave Airlie21f16282007-08-07 09:09:51 +1000700 if (!IS_I965G(dev))
Eric Anholtc153f452007-09-03 12:06:45 +1000701 dev_priv->use_mi_batchbuffer_start = param->value;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702 break;
703 case I915_SETPARAM_TEX_LRU_LOG_GRANULARITY:
Eric Anholtc153f452007-09-03 12:06:45 +1000704 dev_priv->tex_lru_log_granularity = param->value;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705 break;
706 case I915_SETPARAM_ALLOW_BATCHBUFFER:
Eric Anholtc153f452007-09-03 12:06:45 +1000707 dev_priv->allow_batchbuffer = param->value;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708 break;
709 default:
Eric Anholtc153f452007-09-03 12:06:45 +1000710 DRM_ERROR("unknown parameter %d\n", param->param);
Eric Anholt20caafa2007-08-25 19:22:43 +1000711 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712 }
713
714 return 0;
715}
716
Eric Anholtc153f452007-09-03 12:06:45 +1000717static int i915_set_status_page(struct drm_device *dev, void *data,
718 struct drm_file *file_priv)
Wang Zhenyudc7a9312007-06-10 15:58:19 +1000719{
Wang Zhenyudc7a9312007-06-10 15:58:19 +1000720 drm_i915_private_t *dev_priv = dev->dev_private;
Eric Anholtc153f452007-09-03 12:06:45 +1000721 drm_i915_hws_addr_t *hws = data;
Wang Zhenyudc7a9312007-06-10 15:58:19 +1000722
723 if (!dev_priv) {
724 DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
Eric Anholt20caafa2007-08-25 19:22:43 +1000725 return -EINVAL;
Wang Zhenyudc7a9312007-06-10 15:58:19 +1000726 }
Wang Zhenyudc7a9312007-06-10 15:58:19 +1000727
Eric Anholtc153f452007-09-03 12:06:45 +1000728 printk(KERN_DEBUG "set status page addr 0x%08x\n", (u32)hws->addr);
Wang Zhenyudc7a9312007-06-10 15:58:19 +1000729
Eric Anholtc153f452007-09-03 12:06:45 +1000730 dev_priv->status_gfx_addr = hws->addr & (0x1ffff<<12);
731
Eric Anholt8b409582007-11-22 16:40:37 +1000732 dev_priv->hws_map.offset = dev->agp->base + hws->addr;
Wang Zhenyudc7a9312007-06-10 15:58:19 +1000733 dev_priv->hws_map.size = 4*1024;
734 dev_priv->hws_map.type = 0;
735 dev_priv->hws_map.flags = 0;
736 dev_priv->hws_map.mtrr = 0;
737
738 drm_core_ioremap(&dev_priv->hws_map, dev);
739 if (dev_priv->hws_map.handle == NULL) {
Wang Zhenyudc7a9312007-06-10 15:58:19 +1000740 i915_dma_cleanup(dev);
741 dev_priv->status_gfx_addr = 0;
742 DRM_ERROR("can not ioremap virtual address for"
743 " G33 hw status page\n");
Eric Anholt20caafa2007-08-25 19:22:43 +1000744 return -ENOMEM;
Wang Zhenyudc7a9312007-06-10 15:58:19 +1000745 }
746 dev_priv->hw_status_page = dev_priv->hws_map.handle;
747
748 memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
749 I915_WRITE(0x02080, dev_priv->status_gfx_addr);
750 DRM_DEBUG("load hws 0x2080 with gfx mem 0x%x\n",
751 dev_priv->status_gfx_addr);
752 DRM_DEBUG("load hws at %p\n", dev_priv->hw_status_page);
753 return 0;
754}
755
Dave Airlie84b1fd12007-07-11 15:53:27 +1000756int i915_driver_load(struct drm_device *dev, unsigned long flags)
Dave Airlie22eae942005-11-10 22:16:34 +1100757{
Jesse Barnesba8bbcf2007-11-22 14:14:14 +1000758 struct drm_i915_private *dev_priv = dev->dev_private;
759 unsigned long base, size;
760 int ret = 0, mmio_bar = IS_I9XX(dev) ? 0 : 1;
761
Dave Airlie22eae942005-11-10 22:16:34 +1100762 /* i915 has 4 more counters */
763 dev->counters += 4;
764 dev->types[6] = _DRM_STAT_IRQ;
765 dev->types[7] = _DRM_STAT_PRIMARY;
766 dev->types[8] = _DRM_STAT_SECONDARY;
767 dev->types[9] = _DRM_STAT_DMA;
768
Jesse Barnesba8bbcf2007-11-22 14:14:14 +1000769 dev_priv = drm_alloc(sizeof(drm_i915_private_t), DRM_MEM_DRIVER);
770 if (dev_priv == NULL)
771 return -ENOMEM;
772
773 memset(dev_priv, 0, sizeof(drm_i915_private_t));
774
775 dev->dev_private = (void *)dev_priv;
776
777 /* Add register map (needed for suspend/resume) */
778 base = drm_get_resource_start(dev, mmio_bar);
779 size = drm_get_resource_len(dev, mmio_bar);
780
781 ret = drm_addmap(dev, base, size, _DRM_REGISTERS, _DRM_KERNEL,
782 &dev_priv->mmio_map);
783 return ret;
784}
785
786int i915_driver_unload(struct drm_device *dev)
787{
788 struct drm_i915_private *dev_priv = dev->dev_private;
789
790 if (dev_priv->mmio_map)
791 drm_rmmap(dev, dev_priv->mmio_map);
792
793 drm_free(dev->dev_private, sizeof(drm_i915_private_t),
794 DRM_MEM_DRIVER);
795
Dave Airlie22eae942005-11-10 22:16:34 +1100796 return 0;
797}
798
Dave Airlie84b1fd12007-07-11 15:53:27 +1000799void i915_driver_lastclose(struct drm_device * dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800{
Jesse Barnesba8bbcf2007-11-22 14:14:14 +1000801 drm_i915_private_t *dev_priv = dev->dev_private;
802
803 if (dev_priv->agp_heap)
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000804 i915_mem_takedown(&(dev_priv->agp_heap));
Jesse Barnesba8bbcf2007-11-22 14:14:14 +1000805
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000806 i915_dma_cleanup(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807}
808
Eric Anholt6c340ea2007-08-25 20:23:09 +1000809void i915_driver_preclose(struct drm_device * dev, struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810{
Jesse Barnesba8bbcf2007-11-22 14:14:14 +1000811 drm_i915_private_t *dev_priv = dev->dev_private;
812 i915_mem_release(dev, file_priv, dev_priv->agp_heap);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813}
814
Eric Anholtc153f452007-09-03 12:06:45 +1000815struct drm_ioctl_desc i915_ioctls[] = {
816 DRM_IOCTL_DEF(DRM_I915_INIT, i915_dma_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
817 DRM_IOCTL_DEF(DRM_I915_FLUSH, i915_flush_ioctl, DRM_AUTH),
818 DRM_IOCTL_DEF(DRM_I915_FLIP, i915_flip_bufs, DRM_AUTH),
819 DRM_IOCTL_DEF(DRM_I915_BATCHBUFFER, i915_batchbuffer, DRM_AUTH),
820 DRM_IOCTL_DEF(DRM_I915_IRQ_EMIT, i915_irq_emit, DRM_AUTH),
821 DRM_IOCTL_DEF(DRM_I915_IRQ_WAIT, i915_irq_wait, DRM_AUTH),
822 DRM_IOCTL_DEF(DRM_I915_GETPARAM, i915_getparam, DRM_AUTH),
823 DRM_IOCTL_DEF(DRM_I915_SETPARAM, i915_setparam, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
824 DRM_IOCTL_DEF(DRM_I915_ALLOC, i915_mem_alloc, DRM_AUTH),
825 DRM_IOCTL_DEF(DRM_I915_FREE, i915_mem_free, DRM_AUTH),
826 DRM_IOCTL_DEF(DRM_I915_INIT_HEAP, i915_mem_init_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
827 DRM_IOCTL_DEF(DRM_I915_CMDBUFFER, i915_cmdbuffer, DRM_AUTH),
828 DRM_IOCTL_DEF(DRM_I915_DESTROY_HEAP, i915_mem_destroy_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY ),
829 DRM_IOCTL_DEF(DRM_I915_SET_VBLANK_PIPE, i915_vblank_pipe_set, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY ),
830 DRM_IOCTL_DEF(DRM_I915_GET_VBLANK_PIPE, i915_vblank_pipe_get, DRM_AUTH ),
831 DRM_IOCTL_DEF(DRM_I915_VBLANK_SWAP, i915_vblank_swap, DRM_AUTH),
832 DRM_IOCTL_DEF(DRM_I915_HWS_ADDR, i915_set_status_page, DRM_AUTH),
Dave Airliec94f7022005-07-07 21:03:38 +1000833};
834
835int i915_max_ioctl = DRM_ARRAY_SIZE(i915_ioctls);
Dave Airliecda17382005-07-10 17:31:26 +1000836
837/**
838 * Determine if the device really is AGP or not.
839 *
840 * All Intel graphics chipsets are treated as AGP, even if they are really
841 * PCI-e.
842 *
843 * \param dev The device to be tested.
844 *
845 * \returns
846 * A value of 1 is always retured to indictate every i9x5 is AGP.
847 */
Dave Airlie84b1fd12007-07-11 15:53:27 +1000848int i915_driver_device_is_agp(struct drm_device * dev)
Dave Airliecda17382005-07-10 17:31:26 +1000849{
850 return 1;
851}