Merge branch 'drm-patches' of ssh://master.kernel.org/pub/scm/linux/kernel/git/airlie...
[sfrench/cifs-2.6.git] / drivers / char / drm / i810_dma.c
1 /* i810_dma.c -- DMA support for the i810 -*- linux-c -*-
2  * Created: Mon Dec 13 01:50:01 1999 by jhartmann@precisioninsight.com
3  *
4  * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
5  * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
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 "Software"),
10  * to deal in the Software without restriction, including without limitation
11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12  * and/or sell copies of the Software, and to permit persons to whom the
13  * Software is furnished to do so, subject to the following conditions:
14  *
15  * The above copyright notice and this permission notice (including the next
16  * paragraph) shall be included in all copies or substantial portions of the
17  * Software.
18  *
19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
22  * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
23  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
24  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
25  * DEALINGS IN THE SOFTWARE.
26  *
27  * Authors: Rickard E. (Rik) Faith <faith@valinux.com>
28  *          Jeff Hartmann <jhartmann@valinux.com>
29  *          Keith Whitwell <keith@tungstengraphics.com>
30  *
31  */
32
33 #include "drmP.h"
34 #include "drm.h"
35 #include "i810_drm.h"
36 #include "i810_drv.h"
37 #include <linux/interrupt.h>    /* For task queue support */
38 #include <linux/delay.h>
39 #include <linux/pagemap.h>
40
41 #define I810_BUF_FREE           2
42 #define I810_BUF_CLIENT         1
43 #define I810_BUF_HARDWARE       0
44
45 #define I810_BUF_UNMAPPED 0
46 #define I810_BUF_MAPPED   1
47
48 static struct drm_buf *i810_freelist_get(struct drm_device * dev)
49 {
50         struct drm_device_dma *dma = dev->dma;
51         int i;
52         int used;
53
54         /* Linear search might not be the best solution */
55
56         for (i = 0; i < dma->buf_count; i++) {
57                 struct drm_buf *buf = dma->buflist[i];
58                 drm_i810_buf_priv_t *buf_priv = buf->dev_private;
59                 /* In use is already a pointer */
60                 used = cmpxchg(buf_priv->in_use, I810_BUF_FREE,
61                                I810_BUF_CLIENT);
62                 if (used == I810_BUF_FREE) {
63                         return buf;
64                 }
65         }
66         return NULL;
67 }
68
69 /* This should only be called if the buffer is not sent to the hardware
70  * yet, the hardware updates in use for us once its on the ring buffer.
71  */
72
73 static int i810_freelist_put(struct drm_device * dev, struct drm_buf * buf)
74 {
75         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
76         int used;
77
78         /* In use is already a pointer */
79         used = cmpxchg(buf_priv->in_use, I810_BUF_CLIENT, I810_BUF_FREE);
80         if (used != I810_BUF_CLIENT) {
81                 DRM_ERROR("Freeing buffer thats not in use : %d\n", buf->idx);
82                 return -EINVAL;
83         }
84
85         return 0;
86 }
87
88 static int i810_mmap_buffers(struct file *filp, struct vm_area_struct *vma)
89 {
90         struct drm_file *priv = filp->private_data;
91         struct drm_device *dev;
92         drm_i810_private_t *dev_priv;
93         struct drm_buf *buf;
94         drm_i810_buf_priv_t *buf_priv;
95
96         lock_kernel();
97         dev = priv->head->dev;
98         dev_priv = dev->dev_private;
99         buf = dev_priv->mmap_buffer;
100         buf_priv = buf->dev_private;
101
102         vma->vm_flags |= (VM_IO | VM_DONTCOPY);
103         vma->vm_file = filp;
104
105         buf_priv->currently_mapped = I810_BUF_MAPPED;
106         unlock_kernel();
107
108         if (io_remap_pfn_range(vma, vma->vm_start,
109                                vma->vm_pgoff,
110                                vma->vm_end - vma->vm_start, vma->vm_page_prot))
111                 return -EAGAIN;
112         return 0;
113 }
114
115 static const struct file_operations i810_buffer_fops = {
116         .open = drm_open,
117         .release = drm_release,
118         .ioctl = drm_ioctl,
119         .mmap = i810_mmap_buffers,
120         .fasync = drm_fasync,
121 };
122
123 static int i810_map_buffer(struct drm_buf * buf, struct file *filp)
124 {
125         struct drm_file *priv = filp->private_data;
126         struct drm_device *dev = priv->head->dev;
127         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
128         drm_i810_private_t *dev_priv = dev->dev_private;
129         const struct file_operations *old_fops;
130         int retcode = 0;
131
132         if (buf_priv->currently_mapped == I810_BUF_MAPPED)
133                 return -EINVAL;
134
135         down_write(&current->mm->mmap_sem);
136         old_fops = filp->f_op;
137         filp->f_op = &i810_buffer_fops;
138         dev_priv->mmap_buffer = buf;
139         buf_priv->virtual = (void *)do_mmap(filp, 0, buf->total,
140                                             PROT_READ | PROT_WRITE,
141                                             MAP_SHARED, buf->bus_address);
142         dev_priv->mmap_buffer = NULL;
143         filp->f_op = old_fops;
144         if (IS_ERR(buf_priv->virtual)) {
145                 /* Real error */
146                 DRM_ERROR("mmap error\n");
147                 retcode = PTR_ERR(buf_priv->virtual);
148                 buf_priv->virtual = NULL;
149         }
150         up_write(&current->mm->mmap_sem);
151
152         return retcode;
153 }
154
155 static int i810_unmap_buffer(struct drm_buf * buf)
156 {
157         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
158         int retcode = 0;
159
160         if (buf_priv->currently_mapped != I810_BUF_MAPPED)
161                 return -EINVAL;
162
163         down_write(&current->mm->mmap_sem);
164         retcode = do_munmap(current->mm,
165                             (unsigned long)buf_priv->virtual,
166                             (size_t) buf->total);
167         up_write(&current->mm->mmap_sem);
168
169         buf_priv->currently_mapped = I810_BUF_UNMAPPED;
170         buf_priv->virtual = NULL;
171
172         return retcode;
173 }
174
175 static int i810_dma_get_buffer(struct drm_device * dev, drm_i810_dma_t * d,
176                                struct file *filp)
177 {
178         struct drm_buf *buf;
179         drm_i810_buf_priv_t *buf_priv;
180         int retcode = 0;
181
182         buf = i810_freelist_get(dev);
183         if (!buf) {
184                 retcode = -ENOMEM;
185                 DRM_DEBUG("retcode=%d\n", retcode);
186                 return retcode;
187         }
188
189         retcode = i810_map_buffer(buf, filp);
190         if (retcode) {
191                 i810_freelist_put(dev, buf);
192                 DRM_ERROR("mapbuf failed, retcode %d\n", retcode);
193                 return retcode;
194         }
195         buf->filp = filp;
196         buf_priv = buf->dev_private;
197         d->granted = 1;
198         d->request_idx = buf->idx;
199         d->request_size = buf->total;
200         d->virtual = buf_priv->virtual;
201
202         return retcode;
203 }
204
205 static int i810_dma_cleanup(struct drm_device * dev)
206 {
207         struct drm_device_dma *dma = dev->dma;
208
209         /* Make sure interrupts are disabled here because the uninstall ioctl
210          * may not have been called from userspace and after dev_private
211          * is freed, it's too late.
212          */
213         if (drm_core_check_feature(dev, DRIVER_HAVE_IRQ) && dev->irq_enabled)
214                 drm_irq_uninstall(dev);
215
216         if (dev->dev_private) {
217                 int i;
218                 drm_i810_private_t *dev_priv =
219                     (drm_i810_private_t *) dev->dev_private;
220
221                 if (dev_priv->ring.virtual_start) {
222                         drm_core_ioremapfree(&dev_priv->ring.map, dev);
223                 }
224                 if (dev_priv->hw_status_page) {
225                         pci_free_consistent(dev->pdev, PAGE_SIZE,
226                                             dev_priv->hw_status_page,
227                                             dev_priv->dma_status_page);
228                         /* Need to rewrite hardware status page */
229                         I810_WRITE(0x02080, 0x1ffff000);
230                 }
231                 drm_free(dev->dev_private, sizeof(drm_i810_private_t),
232                          DRM_MEM_DRIVER);
233                 dev->dev_private = NULL;
234
235                 for (i = 0; i < dma->buf_count; i++) {
236                         struct drm_buf *buf = dma->buflist[i];
237                         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
238
239                         if (buf_priv->kernel_virtual && buf->total)
240                                 drm_core_ioremapfree(&buf_priv->map, dev);
241                 }
242         }
243         return 0;
244 }
245
246 static int i810_wait_ring(struct drm_device * dev, int n)
247 {
248         drm_i810_private_t *dev_priv = dev->dev_private;
249         drm_i810_ring_buffer_t *ring = &(dev_priv->ring);
250         int iters = 0;
251         unsigned long end;
252         unsigned int last_head = I810_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
253
254         end = jiffies + (HZ * 3);
255         while (ring->space < n) {
256                 ring->head = I810_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
257                 ring->space = ring->head - (ring->tail + 8);
258                 if (ring->space < 0)
259                         ring->space += ring->Size;
260
261                 if (ring->head != last_head) {
262                         end = jiffies + (HZ * 3);
263                         last_head = ring->head;
264                 }
265
266                 iters++;
267                 if (time_before(end, jiffies)) {
268                         DRM_ERROR("space: %d wanted %d\n", ring->space, n);
269                         DRM_ERROR("lockup\n");
270                         goto out_wait_ring;
271                 }
272                 udelay(1);
273         }
274
275       out_wait_ring:
276         return iters;
277 }
278
279 static void i810_kernel_lost_context(struct drm_device * dev)
280 {
281         drm_i810_private_t *dev_priv = dev->dev_private;
282         drm_i810_ring_buffer_t *ring = &(dev_priv->ring);
283
284         ring->head = I810_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
285         ring->tail = I810_READ(LP_RING + RING_TAIL);
286         ring->space = ring->head - (ring->tail + 8);
287         if (ring->space < 0)
288                 ring->space += ring->Size;
289 }
290
291 static int i810_freelist_init(struct drm_device * dev, drm_i810_private_t * dev_priv)
292 {
293         struct drm_device_dma *dma = dev->dma;
294         int my_idx = 24;
295         u32 *hw_status = (u32 *) (dev_priv->hw_status_page + my_idx);
296         int i;
297
298         if (dma->buf_count > 1019) {
299                 /* Not enough space in the status page for the freelist */
300                 return -EINVAL;
301         }
302
303         for (i = 0; i < dma->buf_count; i++) {
304                 struct drm_buf *buf = dma->buflist[i];
305                 drm_i810_buf_priv_t *buf_priv = buf->dev_private;
306
307                 buf_priv->in_use = hw_status++;
308                 buf_priv->my_use_idx = my_idx;
309                 my_idx += 4;
310
311                 *buf_priv->in_use = I810_BUF_FREE;
312
313                 buf_priv->map.offset = buf->bus_address;
314                 buf_priv->map.size = buf->total;
315                 buf_priv->map.type = _DRM_AGP;
316                 buf_priv->map.flags = 0;
317                 buf_priv->map.mtrr = 0;
318
319                 drm_core_ioremap(&buf_priv->map, dev);
320                 buf_priv->kernel_virtual = buf_priv->map.handle;
321
322         }
323         return 0;
324 }
325
326 static int i810_dma_initialize(struct drm_device * dev,
327                                drm_i810_private_t * dev_priv,
328                                drm_i810_init_t * init)
329 {
330         struct drm_map_list *r_list;
331         memset(dev_priv, 0, sizeof(drm_i810_private_t));
332
333         list_for_each_entry(r_list, &dev->maplist, head) {
334                 if (r_list->map &&
335                     r_list->map->type == _DRM_SHM &&
336                     r_list->map->flags & _DRM_CONTAINS_LOCK) {
337                         dev_priv->sarea_map = r_list->map;
338                         break;
339                 }
340         }
341         if (!dev_priv->sarea_map) {
342                 dev->dev_private = (void *)dev_priv;
343                 i810_dma_cleanup(dev);
344                 DRM_ERROR("can not find sarea!\n");
345                 return -EINVAL;
346         }
347         dev_priv->mmio_map = drm_core_findmap(dev, init->mmio_offset);
348         if (!dev_priv->mmio_map) {
349                 dev->dev_private = (void *)dev_priv;
350                 i810_dma_cleanup(dev);
351                 DRM_ERROR("can not find mmio map!\n");
352                 return -EINVAL;
353         }
354         dev->agp_buffer_token = init->buffers_offset;
355         dev->agp_buffer_map = drm_core_findmap(dev, init->buffers_offset);
356         if (!dev->agp_buffer_map) {
357                 dev->dev_private = (void *)dev_priv;
358                 i810_dma_cleanup(dev);
359                 DRM_ERROR("can not find dma buffer map!\n");
360                 return -EINVAL;
361         }
362
363         dev_priv->sarea_priv = (drm_i810_sarea_t *)
364             ((u8 *) dev_priv->sarea_map->handle + init->sarea_priv_offset);
365
366         dev_priv->ring.Start = init->ring_start;
367         dev_priv->ring.End = init->ring_end;
368         dev_priv->ring.Size = init->ring_size;
369
370         dev_priv->ring.map.offset = dev->agp->base + init->ring_start;
371         dev_priv->ring.map.size = init->ring_size;
372         dev_priv->ring.map.type = _DRM_AGP;
373         dev_priv->ring.map.flags = 0;
374         dev_priv->ring.map.mtrr = 0;
375
376         drm_core_ioremap(&dev_priv->ring.map, dev);
377
378         if (dev_priv->ring.map.handle == NULL) {
379                 dev->dev_private = (void *)dev_priv;
380                 i810_dma_cleanup(dev);
381                 DRM_ERROR("can not ioremap virtual address for"
382                           " ring buffer\n");
383                 return DRM_ERR(ENOMEM);
384         }
385
386         dev_priv->ring.virtual_start = dev_priv->ring.map.handle;
387
388         dev_priv->ring.tail_mask = dev_priv->ring.Size - 1;
389
390         dev_priv->w = init->w;
391         dev_priv->h = init->h;
392         dev_priv->pitch = init->pitch;
393         dev_priv->back_offset = init->back_offset;
394         dev_priv->depth_offset = init->depth_offset;
395         dev_priv->front_offset = init->front_offset;
396
397         dev_priv->overlay_offset = init->overlay_offset;
398         dev_priv->overlay_physical = init->overlay_physical;
399
400         dev_priv->front_di1 = init->front_offset | init->pitch_bits;
401         dev_priv->back_di1 = init->back_offset | init->pitch_bits;
402         dev_priv->zi1 = init->depth_offset | init->pitch_bits;
403
404         /* Program Hardware Status Page */
405         dev_priv->hw_status_page =
406             pci_alloc_consistent(dev->pdev, PAGE_SIZE,
407                                  &dev_priv->dma_status_page);
408         if (!dev_priv->hw_status_page) {
409                 dev->dev_private = (void *)dev_priv;
410                 i810_dma_cleanup(dev);
411                 DRM_ERROR("Can not allocate hardware status page\n");
412                 return -ENOMEM;
413         }
414         memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
415         DRM_DEBUG("hw status page @ %p\n", dev_priv->hw_status_page);
416
417         I810_WRITE(0x02080, dev_priv->dma_status_page);
418         DRM_DEBUG("Enabled hardware status page\n");
419
420         /* Now we need to init our freelist */
421         if (i810_freelist_init(dev, dev_priv) != 0) {
422                 dev->dev_private = (void *)dev_priv;
423                 i810_dma_cleanup(dev);
424                 DRM_ERROR("Not enough space in the status page for"
425                           " the freelist\n");
426                 return -ENOMEM;
427         }
428         dev->dev_private = (void *)dev_priv;
429
430         return 0;
431 }
432
433 /* i810 DRM version 1.1 used a smaller init structure with different
434  * ordering of values than is currently used (drm >= 1.2). There is
435  * no defined way to detect the XFree version to correct this problem,
436  * however by checking using this procedure we can detect the correct
437  * thing to do.
438  *
439  * #1 Read the Smaller init structure from user-space
440  * #2 Verify the overlay_physical is a valid physical address, or NULL
441  *    If it isn't then we have a v1.1 client. Fix up params.
442  *    If it is, then we have a 1.2 client... get the rest of the data.
443  */
444 static int i810_dma_init_compat(drm_i810_init_t * init, unsigned long arg)
445 {
446
447         /* Get v1.1 init data */
448         if (copy_from_user(init, (drm_i810_pre12_init_t __user *) arg,
449                            sizeof(drm_i810_pre12_init_t))) {
450                 return -EFAULT;
451         }
452
453         if ((!init->overlay_physical) || (init->overlay_physical > 4096)) {
454
455                 /* This is a v1.2 client, just get the v1.2 init data */
456                 DRM_INFO("Using POST v1.2 init.\n");
457                 if (copy_from_user(init, (drm_i810_init_t __user *) arg,
458                                    sizeof(drm_i810_init_t))) {
459                         return -EFAULT;
460                 }
461         } else {
462
463                 /* This is a v1.1 client, fix the params */
464                 DRM_INFO("Using PRE v1.2 init.\n");
465                 init->pitch_bits = init->h;
466                 init->pitch = init->w;
467                 init->h = init->overlay_physical;
468                 init->w = init->overlay_offset;
469                 init->overlay_physical = 0;
470                 init->overlay_offset = 0;
471         }
472
473         return 0;
474 }
475
476 static int i810_dma_init(struct inode *inode, struct file *filp,
477                          unsigned int cmd, unsigned long arg)
478 {
479         struct drm_file *priv = filp->private_data;
480         struct drm_device *dev = priv->head->dev;
481         drm_i810_private_t *dev_priv;
482         drm_i810_init_t init;
483         int retcode = 0;
484
485         /* Get only the init func */
486         if (copy_from_user
487             (&init, (void __user *)arg, sizeof(drm_i810_init_func_t)))
488                 return -EFAULT;
489
490         switch (init.func) {
491         case I810_INIT_DMA:
492                 /* This case is for backward compatibility. It
493                  * handles XFree 4.1.0 and 4.2.0, and has to
494                  * do some parameter checking as described below.
495                  * It will someday go away.
496                  */
497                 retcode = i810_dma_init_compat(&init, arg);
498                 if (retcode)
499                         return retcode;
500
501                 dev_priv = drm_alloc(sizeof(drm_i810_private_t),
502                                      DRM_MEM_DRIVER);
503                 if (dev_priv == NULL)
504                         return -ENOMEM;
505                 retcode = i810_dma_initialize(dev, dev_priv, &init);
506                 break;
507
508         default:
509         case I810_INIT_DMA_1_4:
510                 DRM_INFO("Using v1.4 init.\n");
511                 if (copy_from_user(&init, (drm_i810_init_t __user *) arg,
512                                    sizeof(drm_i810_init_t))) {
513                         return -EFAULT;
514                 }
515                 dev_priv = drm_alloc(sizeof(drm_i810_private_t),
516                                      DRM_MEM_DRIVER);
517                 if (dev_priv == NULL)
518                         return -ENOMEM;
519                 retcode = i810_dma_initialize(dev, dev_priv, &init);
520                 break;
521
522         case I810_CLEANUP_DMA:
523                 DRM_INFO("DMA Cleanup\n");
524                 retcode = i810_dma_cleanup(dev);
525                 break;
526         }
527
528         return retcode;
529 }
530
531 /* Most efficient way to verify state for the i810 is as it is
532  * emitted.  Non-conformant state is silently dropped.
533  *
534  * Use 'volatile' & local var tmp to force the emitted values to be
535  * identical to the verified ones.
536  */
537 static void i810EmitContextVerified(struct drm_device * dev,
538                                     volatile unsigned int *code)
539 {
540         drm_i810_private_t *dev_priv = dev->dev_private;
541         int i, j = 0;
542         unsigned int tmp;
543         RING_LOCALS;
544
545         BEGIN_LP_RING(I810_CTX_SETUP_SIZE);
546
547         OUT_RING(GFX_OP_COLOR_FACTOR);
548         OUT_RING(code[I810_CTXREG_CF1]);
549
550         OUT_RING(GFX_OP_STIPPLE);
551         OUT_RING(code[I810_CTXREG_ST1]);
552
553         for (i = 4; i < I810_CTX_SETUP_SIZE; i++) {
554                 tmp = code[i];
555
556                 if ((tmp & (7 << 29)) == (3 << 29) &&
557                     (tmp & (0x1f << 24)) < (0x1d << 24)) {
558                         OUT_RING(tmp);
559                         j++;
560                 } else
561                         printk("constext state dropped!!!\n");
562         }
563
564         if (j & 1)
565                 OUT_RING(0);
566
567         ADVANCE_LP_RING();
568 }
569
570 static void i810EmitTexVerified(struct drm_device * dev, volatile unsigned int *code)
571 {
572         drm_i810_private_t *dev_priv = dev->dev_private;
573         int i, j = 0;
574         unsigned int tmp;
575         RING_LOCALS;
576
577         BEGIN_LP_RING(I810_TEX_SETUP_SIZE);
578
579         OUT_RING(GFX_OP_MAP_INFO);
580         OUT_RING(code[I810_TEXREG_MI1]);
581         OUT_RING(code[I810_TEXREG_MI2]);
582         OUT_RING(code[I810_TEXREG_MI3]);
583
584         for (i = 4; i < I810_TEX_SETUP_SIZE; i++) {
585                 tmp = code[i];
586
587                 if ((tmp & (7 << 29)) == (3 << 29) &&
588                     (tmp & (0x1f << 24)) < (0x1d << 24)) {
589                         OUT_RING(tmp);
590                         j++;
591                 } else
592                         printk("texture state dropped!!!\n");
593         }
594
595         if (j & 1)
596                 OUT_RING(0);
597
598         ADVANCE_LP_RING();
599 }
600
601 /* Need to do some additional checking when setting the dest buffer.
602  */
603 static void i810EmitDestVerified(struct drm_device * dev,
604                                  volatile unsigned int *code)
605 {
606         drm_i810_private_t *dev_priv = dev->dev_private;
607         unsigned int tmp;
608         RING_LOCALS;
609
610         BEGIN_LP_RING(I810_DEST_SETUP_SIZE + 2);
611
612         tmp = code[I810_DESTREG_DI1];
613         if (tmp == dev_priv->front_di1 || tmp == dev_priv->back_di1) {
614                 OUT_RING(CMD_OP_DESTBUFFER_INFO);
615                 OUT_RING(tmp);
616         } else
617                 DRM_DEBUG("bad di1 %x (allow %x or %x)\n",
618                           tmp, dev_priv->front_di1, dev_priv->back_di1);
619
620         /* invarient:
621          */
622         OUT_RING(CMD_OP_Z_BUFFER_INFO);
623         OUT_RING(dev_priv->zi1);
624
625         OUT_RING(GFX_OP_DESTBUFFER_VARS);
626         OUT_RING(code[I810_DESTREG_DV1]);
627
628         OUT_RING(GFX_OP_DRAWRECT_INFO);
629         OUT_RING(code[I810_DESTREG_DR1]);
630         OUT_RING(code[I810_DESTREG_DR2]);
631         OUT_RING(code[I810_DESTREG_DR3]);
632         OUT_RING(code[I810_DESTREG_DR4]);
633         OUT_RING(0);
634
635         ADVANCE_LP_RING();
636 }
637
638 static void i810EmitState(struct drm_device * dev)
639 {
640         drm_i810_private_t *dev_priv = dev->dev_private;
641         drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
642         unsigned int dirty = sarea_priv->dirty;
643
644         DRM_DEBUG("%s %x\n", __FUNCTION__, dirty);
645
646         if (dirty & I810_UPLOAD_BUFFERS) {
647                 i810EmitDestVerified(dev, sarea_priv->BufferState);
648                 sarea_priv->dirty &= ~I810_UPLOAD_BUFFERS;
649         }
650
651         if (dirty & I810_UPLOAD_CTX) {
652                 i810EmitContextVerified(dev, sarea_priv->ContextState);
653                 sarea_priv->dirty &= ~I810_UPLOAD_CTX;
654         }
655
656         if (dirty & I810_UPLOAD_TEX0) {
657                 i810EmitTexVerified(dev, sarea_priv->TexState[0]);
658                 sarea_priv->dirty &= ~I810_UPLOAD_TEX0;
659         }
660
661         if (dirty & I810_UPLOAD_TEX1) {
662                 i810EmitTexVerified(dev, sarea_priv->TexState[1]);
663                 sarea_priv->dirty &= ~I810_UPLOAD_TEX1;
664         }
665 }
666
667 /* need to verify
668  */
669 static void i810_dma_dispatch_clear(struct drm_device * dev, int flags,
670                                     unsigned int clear_color,
671                                     unsigned int clear_zval)
672 {
673         drm_i810_private_t *dev_priv = dev->dev_private;
674         drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
675         int nbox = sarea_priv->nbox;
676         struct drm_clip_rect *pbox = sarea_priv->boxes;
677         int pitch = dev_priv->pitch;
678         int cpp = 2;
679         int i;
680         RING_LOCALS;
681
682         if (dev_priv->current_page == 1) {
683                 unsigned int tmp = flags;
684
685                 flags &= ~(I810_FRONT | I810_BACK);
686                 if (tmp & I810_FRONT)
687                         flags |= I810_BACK;
688                 if (tmp & I810_BACK)
689                         flags |= I810_FRONT;
690         }
691
692         i810_kernel_lost_context(dev);
693
694         if (nbox > I810_NR_SAREA_CLIPRECTS)
695                 nbox = I810_NR_SAREA_CLIPRECTS;
696
697         for (i = 0; i < nbox; i++, pbox++) {
698                 unsigned int x = pbox->x1;
699                 unsigned int y = pbox->y1;
700                 unsigned int width = (pbox->x2 - x) * cpp;
701                 unsigned int height = pbox->y2 - y;
702                 unsigned int start = y * pitch + x * cpp;
703
704                 if (pbox->x1 > pbox->x2 ||
705                     pbox->y1 > pbox->y2 ||
706                     pbox->x2 > dev_priv->w || pbox->y2 > dev_priv->h)
707                         continue;
708
709                 if (flags & I810_FRONT) {
710                         BEGIN_LP_RING(6);
711                         OUT_RING(BR00_BITBLT_CLIENT | BR00_OP_COLOR_BLT | 0x3);
712                         OUT_RING(BR13_SOLID_PATTERN | (0xF0 << 16) | pitch);
713                         OUT_RING((height << 16) | width);
714                         OUT_RING(start);
715                         OUT_RING(clear_color);
716                         OUT_RING(0);
717                         ADVANCE_LP_RING();
718                 }
719
720                 if (flags & I810_BACK) {
721                         BEGIN_LP_RING(6);
722                         OUT_RING(BR00_BITBLT_CLIENT | BR00_OP_COLOR_BLT | 0x3);
723                         OUT_RING(BR13_SOLID_PATTERN | (0xF0 << 16) | pitch);
724                         OUT_RING((height << 16) | width);
725                         OUT_RING(dev_priv->back_offset + start);
726                         OUT_RING(clear_color);
727                         OUT_RING(0);
728                         ADVANCE_LP_RING();
729                 }
730
731                 if (flags & I810_DEPTH) {
732                         BEGIN_LP_RING(6);
733                         OUT_RING(BR00_BITBLT_CLIENT | BR00_OP_COLOR_BLT | 0x3);
734                         OUT_RING(BR13_SOLID_PATTERN | (0xF0 << 16) | pitch);
735                         OUT_RING((height << 16) | width);
736                         OUT_RING(dev_priv->depth_offset + start);
737                         OUT_RING(clear_zval);
738                         OUT_RING(0);
739                         ADVANCE_LP_RING();
740                 }
741         }
742 }
743
744 static void i810_dma_dispatch_swap(struct drm_device * dev)
745 {
746         drm_i810_private_t *dev_priv = dev->dev_private;
747         drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
748         int nbox = sarea_priv->nbox;
749         struct drm_clip_rect *pbox = sarea_priv->boxes;
750         int pitch = dev_priv->pitch;
751         int cpp = 2;
752         int i;
753         RING_LOCALS;
754
755         DRM_DEBUG("swapbuffers\n");
756
757         i810_kernel_lost_context(dev);
758
759         if (nbox > I810_NR_SAREA_CLIPRECTS)
760                 nbox = I810_NR_SAREA_CLIPRECTS;
761
762         for (i = 0; i < nbox; i++, pbox++) {
763                 unsigned int w = pbox->x2 - pbox->x1;
764                 unsigned int h = pbox->y2 - pbox->y1;
765                 unsigned int dst = pbox->x1 * cpp + pbox->y1 * pitch;
766                 unsigned int start = dst;
767
768                 if (pbox->x1 > pbox->x2 ||
769                     pbox->y1 > pbox->y2 ||
770                     pbox->x2 > dev_priv->w || pbox->y2 > dev_priv->h)
771                         continue;
772
773                 BEGIN_LP_RING(6);
774                 OUT_RING(BR00_BITBLT_CLIENT | BR00_OP_SRC_COPY_BLT | 0x4);
775                 OUT_RING(pitch | (0xCC << 16));
776                 OUT_RING((h << 16) | (w * cpp));
777                 if (dev_priv->current_page == 0)
778                         OUT_RING(dev_priv->front_offset + start);
779                 else
780                         OUT_RING(dev_priv->back_offset + start);
781                 OUT_RING(pitch);
782                 if (dev_priv->current_page == 0)
783                         OUT_RING(dev_priv->back_offset + start);
784                 else
785                         OUT_RING(dev_priv->front_offset + start);
786                 ADVANCE_LP_RING();
787         }
788 }
789
790 static void i810_dma_dispatch_vertex(struct drm_device * dev,
791                                      struct drm_buf * buf, int discard, int used)
792 {
793         drm_i810_private_t *dev_priv = dev->dev_private;
794         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
795         drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
796         struct drm_clip_rect *box = sarea_priv->boxes;
797         int nbox = sarea_priv->nbox;
798         unsigned long address = (unsigned long)buf->bus_address;
799         unsigned long start = address - dev->agp->base;
800         int i = 0;
801         RING_LOCALS;
802
803         i810_kernel_lost_context(dev);
804
805         if (nbox > I810_NR_SAREA_CLIPRECTS)
806                 nbox = I810_NR_SAREA_CLIPRECTS;
807
808         if (used > 4 * 1024)
809                 used = 0;
810
811         if (sarea_priv->dirty)
812                 i810EmitState(dev);
813
814         if (buf_priv->currently_mapped == I810_BUF_MAPPED) {
815                 unsigned int prim = (sarea_priv->vertex_prim & PR_MASK);
816
817                 *(u32 *) buf_priv->kernel_virtual =
818                     ((GFX_OP_PRIMITIVE | prim | ((used / 4) - 2)));
819
820                 if (used & 4) {
821                         *(u32 *) ((char *) buf_priv->kernel_virtual + used) = 0;
822                         used += 4;
823                 }
824
825                 i810_unmap_buffer(buf);
826         }
827
828         if (used) {
829                 do {
830                         if (i < nbox) {
831                                 BEGIN_LP_RING(4);
832                                 OUT_RING(GFX_OP_SCISSOR | SC_UPDATE_SCISSOR |
833                                          SC_ENABLE);
834                                 OUT_RING(GFX_OP_SCISSOR_INFO);
835                                 OUT_RING(box[i].x1 | (box[i].y1 << 16));
836                                 OUT_RING((box[i].x2 -
837                                           1) | ((box[i].y2 - 1) << 16));
838                                 ADVANCE_LP_RING();
839                         }
840
841                         BEGIN_LP_RING(4);
842                         OUT_RING(CMD_OP_BATCH_BUFFER);
843                         OUT_RING(start | BB1_PROTECTED);
844                         OUT_RING(start + used - 4);
845                         OUT_RING(0);
846                         ADVANCE_LP_RING();
847
848                 } while (++i < nbox);
849         }
850
851         if (discard) {
852                 dev_priv->counter++;
853
854                 (void)cmpxchg(buf_priv->in_use, I810_BUF_CLIENT,
855                               I810_BUF_HARDWARE);
856
857                 BEGIN_LP_RING(8);
858                 OUT_RING(CMD_STORE_DWORD_IDX);
859                 OUT_RING(20);
860                 OUT_RING(dev_priv->counter);
861                 OUT_RING(CMD_STORE_DWORD_IDX);
862                 OUT_RING(buf_priv->my_use_idx);
863                 OUT_RING(I810_BUF_FREE);
864                 OUT_RING(CMD_REPORT_HEAD);
865                 OUT_RING(0);
866                 ADVANCE_LP_RING();
867         }
868 }
869
870 static void i810_dma_dispatch_flip(struct drm_device * dev)
871 {
872         drm_i810_private_t *dev_priv = dev->dev_private;
873         int pitch = dev_priv->pitch;
874         RING_LOCALS;
875
876         DRM_DEBUG("%s: page=%d pfCurrentPage=%d\n",
877                   __FUNCTION__,
878                   dev_priv->current_page,
879                   dev_priv->sarea_priv->pf_current_page);
880
881         i810_kernel_lost_context(dev);
882
883         BEGIN_LP_RING(2);
884         OUT_RING(INST_PARSER_CLIENT | INST_OP_FLUSH | INST_FLUSH_MAP_CACHE);
885         OUT_RING(0);
886         ADVANCE_LP_RING();
887
888         BEGIN_LP_RING(I810_DEST_SETUP_SIZE + 2);
889         /* On i815 at least ASYNC is buggy */
890         /* pitch<<5 is from 11.2.8 p158,
891            its the pitch / 8 then left shifted 8,
892            so (pitch >> 3) << 8 */
893         OUT_RING(CMD_OP_FRONTBUFFER_INFO | (pitch << 5) /*| ASYNC_FLIP */ );
894         if (dev_priv->current_page == 0) {
895                 OUT_RING(dev_priv->back_offset);
896                 dev_priv->current_page = 1;
897         } else {
898                 OUT_RING(dev_priv->front_offset);
899                 dev_priv->current_page = 0;
900         }
901         OUT_RING(0);
902         ADVANCE_LP_RING();
903
904         BEGIN_LP_RING(2);
905         OUT_RING(CMD_OP_WAIT_FOR_EVENT | WAIT_FOR_PLANE_A_FLIP);
906         OUT_RING(0);
907         ADVANCE_LP_RING();
908
909         /* Increment the frame counter.  The client-side 3D driver must
910          * throttle the framerate by waiting for this value before
911          * performing the swapbuffer ioctl.
912          */
913         dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
914
915 }
916
917 static void i810_dma_quiescent(struct drm_device * dev)
918 {
919         drm_i810_private_t *dev_priv = dev->dev_private;
920         RING_LOCALS;
921
922 /*      printk("%s\n", __FUNCTION__); */
923
924         i810_kernel_lost_context(dev);
925
926         BEGIN_LP_RING(4);
927         OUT_RING(INST_PARSER_CLIENT | INST_OP_FLUSH | INST_FLUSH_MAP_CACHE);
928         OUT_RING(CMD_REPORT_HEAD);
929         OUT_RING(0);
930         OUT_RING(0);
931         ADVANCE_LP_RING();
932
933         i810_wait_ring(dev, dev_priv->ring.Size - 8);
934 }
935
936 static int i810_flush_queue(struct drm_device * dev)
937 {
938         drm_i810_private_t *dev_priv = dev->dev_private;
939         struct drm_device_dma *dma = dev->dma;
940         int i, ret = 0;
941         RING_LOCALS;
942
943 /*      printk("%s\n", __FUNCTION__); */
944
945         i810_kernel_lost_context(dev);
946
947         BEGIN_LP_RING(2);
948         OUT_RING(CMD_REPORT_HEAD);
949         OUT_RING(0);
950         ADVANCE_LP_RING();
951
952         i810_wait_ring(dev, dev_priv->ring.Size - 8);
953
954         for (i = 0; i < dma->buf_count; i++) {
955                 struct drm_buf *buf = dma->buflist[i];
956                 drm_i810_buf_priv_t *buf_priv = buf->dev_private;
957
958                 int used = cmpxchg(buf_priv->in_use, I810_BUF_HARDWARE,
959                                    I810_BUF_FREE);
960
961                 if (used == I810_BUF_HARDWARE)
962                         DRM_DEBUG("reclaimed from HARDWARE\n");
963                 if (used == I810_BUF_CLIENT)
964                         DRM_DEBUG("still on client\n");
965         }
966
967         return ret;
968 }
969
970 /* Must be called with the lock held */
971 static void i810_reclaim_buffers(struct drm_device * dev, struct file *filp)
972 {
973         struct drm_device_dma *dma = dev->dma;
974         int i;
975
976         if (!dma)
977                 return;
978         if (!dev->dev_private)
979                 return;
980         if (!dma->buflist)
981                 return;
982
983         i810_flush_queue(dev);
984
985         for (i = 0; i < dma->buf_count; i++) {
986                 struct drm_buf *buf = dma->buflist[i];
987                 drm_i810_buf_priv_t *buf_priv = buf->dev_private;
988
989                 if (buf->filp == filp && buf_priv) {
990                         int used = cmpxchg(buf_priv->in_use, I810_BUF_CLIENT,
991                                            I810_BUF_FREE);
992
993                         if (used == I810_BUF_CLIENT)
994                                 DRM_DEBUG("reclaimed from client\n");
995                         if (buf_priv->currently_mapped == I810_BUF_MAPPED)
996                                 buf_priv->currently_mapped = I810_BUF_UNMAPPED;
997                 }
998         }
999 }
1000
1001 static int i810_flush_ioctl(struct inode *inode, struct file *filp,
1002                             unsigned int cmd, unsigned long arg)
1003 {
1004         struct drm_file *priv = filp->private_data;
1005         struct drm_device *dev = priv->head->dev;
1006
1007         LOCK_TEST_WITH_RETURN(dev, filp);
1008
1009         i810_flush_queue(dev);
1010         return 0;
1011 }
1012
1013 static int i810_dma_vertex(struct inode *inode, struct file *filp,
1014                            unsigned int cmd, unsigned long arg)
1015 {
1016         struct drm_file *priv = filp->private_data;
1017         struct drm_device *dev = priv->head->dev;
1018         struct drm_device_dma *dma = dev->dma;
1019         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1020         u32 *hw_status = dev_priv->hw_status_page;
1021         drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
1022             dev_priv->sarea_priv;
1023         drm_i810_vertex_t vertex;
1024
1025         if (copy_from_user
1026             (&vertex, (drm_i810_vertex_t __user *) arg, sizeof(vertex)))
1027                 return -EFAULT;
1028
1029         LOCK_TEST_WITH_RETURN(dev, filp);
1030
1031         DRM_DEBUG("i810 dma vertex, idx %d used %d discard %d\n",
1032                   vertex.idx, vertex.used, vertex.discard);
1033
1034         if (vertex.idx < 0 || vertex.idx > dma->buf_count)
1035                 return -EINVAL;
1036
1037         i810_dma_dispatch_vertex(dev,
1038                                  dma->buflist[vertex.idx],
1039                                  vertex.discard, vertex.used);
1040
1041         atomic_add(vertex.used, &dev->counts[_DRM_STAT_SECONDARY]);
1042         atomic_inc(&dev->counts[_DRM_STAT_DMA]);
1043         sarea_priv->last_enqueue = dev_priv->counter - 1;
1044         sarea_priv->last_dispatch = (int)hw_status[5];
1045
1046         return 0;
1047 }
1048
1049 static int i810_clear_bufs(struct inode *inode, struct file *filp,
1050                            unsigned int cmd, unsigned long arg)
1051 {
1052         struct drm_file *priv = filp->private_data;
1053         struct drm_device *dev = priv->head->dev;
1054         drm_i810_clear_t clear;
1055
1056         if (copy_from_user
1057             (&clear, (drm_i810_clear_t __user *) arg, sizeof(clear)))
1058                 return -EFAULT;
1059
1060         LOCK_TEST_WITH_RETURN(dev, filp);
1061
1062         /* GH: Someone's doing nasty things... */
1063         if (!dev->dev_private) {
1064                 return -EINVAL;
1065         }
1066
1067         i810_dma_dispatch_clear(dev, clear.flags,
1068                                 clear.clear_color, clear.clear_depth);
1069         return 0;
1070 }
1071
1072 static int i810_swap_bufs(struct inode *inode, struct file *filp,
1073                           unsigned int cmd, unsigned long arg)
1074 {
1075         struct drm_file *priv = filp->private_data;
1076         struct drm_device *dev = priv->head->dev;
1077
1078         DRM_DEBUG("i810_swap_bufs\n");
1079
1080         LOCK_TEST_WITH_RETURN(dev, filp);
1081
1082         i810_dma_dispatch_swap(dev);
1083         return 0;
1084 }
1085
1086 static int i810_getage(struct inode *inode, struct file *filp, unsigned int cmd,
1087                        unsigned long arg)
1088 {
1089         struct drm_file *priv = filp->private_data;
1090         struct drm_device *dev = priv->head->dev;
1091         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1092         u32 *hw_status = dev_priv->hw_status_page;
1093         drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
1094             dev_priv->sarea_priv;
1095
1096         sarea_priv->last_dispatch = (int)hw_status[5];
1097         return 0;
1098 }
1099
1100 static int i810_getbuf(struct inode *inode, struct file *filp, unsigned int cmd,
1101                        unsigned long arg)
1102 {
1103         struct drm_file *priv = filp->private_data;
1104         struct drm_device *dev = priv->head->dev;
1105         int retcode = 0;
1106         drm_i810_dma_t d;
1107         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1108         u32 *hw_status = dev_priv->hw_status_page;
1109         drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
1110             dev_priv->sarea_priv;
1111
1112         if (copy_from_user(&d, (drm_i810_dma_t __user *) arg, sizeof(d)))
1113                 return -EFAULT;
1114
1115         LOCK_TEST_WITH_RETURN(dev, filp);
1116
1117         d.granted = 0;
1118
1119         retcode = i810_dma_get_buffer(dev, &d, filp);
1120
1121         DRM_DEBUG("i810_dma: %d returning %d, granted = %d\n",
1122                   current->pid, retcode, d.granted);
1123
1124         if (copy_to_user((void __user *) arg, &d, sizeof(d)))
1125                 return -EFAULT;
1126         sarea_priv->last_dispatch = (int)hw_status[5];
1127
1128         return retcode;
1129 }
1130
1131 static int i810_copybuf(struct inode *inode,
1132                         struct file *filp, unsigned int cmd, unsigned long arg)
1133 {
1134         /* Never copy - 2.4.x doesn't need it */
1135         return 0;
1136 }
1137
1138 static int i810_docopy(struct inode *inode, struct file *filp, unsigned int cmd,
1139                        unsigned long arg)
1140 {
1141         /* Never copy - 2.4.x doesn't need it */
1142         return 0;
1143 }
1144
1145 static void i810_dma_dispatch_mc(struct drm_device * dev, struct drm_buf * buf, int used,
1146                                  unsigned int last_render)
1147 {
1148         drm_i810_private_t *dev_priv = dev->dev_private;
1149         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
1150         drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
1151         unsigned long address = (unsigned long)buf->bus_address;
1152         unsigned long start = address - dev->agp->base;
1153         int u;
1154         RING_LOCALS;
1155
1156         i810_kernel_lost_context(dev);
1157
1158         u = cmpxchg(buf_priv->in_use, I810_BUF_CLIENT, I810_BUF_HARDWARE);
1159         if (u != I810_BUF_CLIENT) {
1160                 DRM_DEBUG("MC found buffer that isn't mine!\n");
1161         }
1162
1163         if (used > 4 * 1024)
1164                 used = 0;
1165
1166         sarea_priv->dirty = 0x7f;
1167
1168         DRM_DEBUG("dispatch mc addr 0x%lx, used 0x%x\n", address, used);
1169
1170         dev_priv->counter++;
1171         DRM_DEBUG("dispatch counter : %ld\n", dev_priv->counter);
1172         DRM_DEBUG("i810_dma_dispatch_mc\n");
1173         DRM_DEBUG("start : %lx\n", start);
1174         DRM_DEBUG("used : %d\n", used);
1175         DRM_DEBUG("start + used - 4 : %ld\n", start + used - 4);
1176
1177         if (buf_priv->currently_mapped == I810_BUF_MAPPED) {
1178                 if (used & 4) {
1179                         *(u32 *) ((char *) buf_priv->virtual + used) = 0;
1180                         used += 4;
1181                 }
1182
1183                 i810_unmap_buffer(buf);
1184         }
1185         BEGIN_LP_RING(4);
1186         OUT_RING(CMD_OP_BATCH_BUFFER);
1187         OUT_RING(start | BB1_PROTECTED);
1188         OUT_RING(start + used - 4);
1189         OUT_RING(0);
1190         ADVANCE_LP_RING();
1191
1192         BEGIN_LP_RING(8);
1193         OUT_RING(CMD_STORE_DWORD_IDX);
1194         OUT_RING(buf_priv->my_use_idx);
1195         OUT_RING(I810_BUF_FREE);
1196         OUT_RING(0);
1197
1198         OUT_RING(CMD_STORE_DWORD_IDX);
1199         OUT_RING(16);
1200         OUT_RING(last_render);
1201         OUT_RING(0);
1202         ADVANCE_LP_RING();
1203 }
1204
1205 static int i810_dma_mc(struct inode *inode, struct file *filp,
1206                        unsigned int cmd, unsigned long arg)
1207 {
1208         struct drm_file *priv = filp->private_data;
1209         struct drm_device *dev = priv->head->dev;
1210         struct drm_device_dma *dma = dev->dma;
1211         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1212         u32 *hw_status = dev_priv->hw_status_page;
1213         drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
1214             dev_priv->sarea_priv;
1215         drm_i810_mc_t mc;
1216
1217         if (copy_from_user(&mc, (drm_i810_mc_t __user *) arg, sizeof(mc)))
1218                 return -EFAULT;
1219
1220         LOCK_TEST_WITH_RETURN(dev, filp);
1221
1222         if (mc.idx >= dma->buf_count || mc.idx < 0)
1223                 return -EINVAL;
1224
1225         i810_dma_dispatch_mc(dev, dma->buflist[mc.idx], mc.used,
1226                              mc.last_render);
1227
1228         atomic_add(mc.used, &dev->counts[_DRM_STAT_SECONDARY]);
1229         atomic_inc(&dev->counts[_DRM_STAT_DMA]);
1230         sarea_priv->last_enqueue = dev_priv->counter - 1;
1231         sarea_priv->last_dispatch = (int)hw_status[5];
1232
1233         return 0;
1234 }
1235
1236 static int i810_rstatus(struct inode *inode, struct file *filp,
1237                         unsigned int cmd, unsigned long arg)
1238 {
1239         struct drm_file *priv = filp->private_data;
1240         struct drm_device *dev = priv->head->dev;
1241         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1242
1243         return (int)(((u32 *) (dev_priv->hw_status_page))[4]);
1244 }
1245
1246 static int i810_ov0_info(struct inode *inode, struct file *filp,
1247                          unsigned int cmd, unsigned long arg)
1248 {
1249         struct drm_file *priv = filp->private_data;
1250         struct drm_device *dev = priv->head->dev;
1251         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1252         drm_i810_overlay_t data;
1253
1254         data.offset = dev_priv->overlay_offset;
1255         data.physical = dev_priv->overlay_physical;
1256         if (copy_to_user
1257             ((drm_i810_overlay_t __user *) arg, &data, sizeof(data)))
1258                 return -EFAULT;
1259         return 0;
1260 }
1261
1262 static int i810_fstatus(struct inode *inode, struct file *filp,
1263                         unsigned int cmd, unsigned long arg)
1264 {
1265         struct drm_file *priv = filp->private_data;
1266         struct drm_device *dev = priv->head->dev;
1267         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1268
1269         LOCK_TEST_WITH_RETURN(dev, filp);
1270
1271         return I810_READ(0x30008);
1272 }
1273
1274 static int i810_ov0_flip(struct inode *inode, struct file *filp,
1275                          unsigned int cmd, unsigned long arg)
1276 {
1277         struct drm_file *priv = filp->private_data;
1278         struct drm_device *dev = priv->head->dev;
1279         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1280
1281         LOCK_TEST_WITH_RETURN(dev, filp);
1282
1283         //Tell the overlay to update
1284         I810_WRITE(0x30000, dev_priv->overlay_physical | 0x80000000);
1285
1286         return 0;
1287 }
1288
1289 /* Not sure why this isn't set all the time:
1290  */
1291 static void i810_do_init_pageflip(struct drm_device * dev)
1292 {
1293         drm_i810_private_t *dev_priv = dev->dev_private;
1294
1295         DRM_DEBUG("%s\n", __FUNCTION__);
1296         dev_priv->page_flipping = 1;
1297         dev_priv->current_page = 0;
1298         dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
1299 }
1300
1301 static int i810_do_cleanup_pageflip(struct drm_device * dev)
1302 {
1303         drm_i810_private_t *dev_priv = dev->dev_private;
1304
1305         DRM_DEBUG("%s\n", __FUNCTION__);
1306         if (dev_priv->current_page != 0)
1307                 i810_dma_dispatch_flip(dev);
1308
1309         dev_priv->page_flipping = 0;
1310         return 0;
1311 }
1312
1313 static int i810_flip_bufs(struct inode *inode, struct file *filp,
1314                           unsigned int cmd, unsigned long arg)
1315 {
1316         struct drm_file *priv = filp->private_data;
1317         struct drm_device *dev = priv->head->dev;
1318         drm_i810_private_t *dev_priv = dev->dev_private;
1319
1320         DRM_DEBUG("%s\n", __FUNCTION__);
1321
1322         LOCK_TEST_WITH_RETURN(dev, filp);
1323
1324         if (!dev_priv->page_flipping)
1325                 i810_do_init_pageflip(dev);
1326
1327         i810_dma_dispatch_flip(dev);
1328         return 0;
1329 }
1330
1331 int i810_driver_load(struct drm_device *dev, unsigned long flags)
1332 {
1333         /* i810 has 4 more counters */
1334         dev->counters += 4;
1335         dev->types[6] = _DRM_STAT_IRQ;
1336         dev->types[7] = _DRM_STAT_PRIMARY;
1337         dev->types[8] = _DRM_STAT_SECONDARY;
1338         dev->types[9] = _DRM_STAT_DMA;
1339
1340         return 0;
1341 }
1342
1343 void i810_driver_lastclose(struct drm_device * dev)
1344 {
1345         i810_dma_cleanup(dev);
1346 }
1347
1348 void i810_driver_preclose(struct drm_device * dev, DRMFILE filp)
1349 {
1350         if (dev->dev_private) {
1351                 drm_i810_private_t *dev_priv = dev->dev_private;
1352                 if (dev_priv->page_flipping) {
1353                         i810_do_cleanup_pageflip(dev);
1354                 }
1355         }
1356 }
1357
1358 void i810_driver_reclaim_buffers_locked(struct drm_device * dev, struct file *filp)
1359 {
1360         i810_reclaim_buffers(dev, filp);
1361 }
1362
1363 int i810_driver_dma_quiescent(struct drm_device * dev)
1364 {
1365         i810_dma_quiescent(dev);
1366         return 0;
1367 }
1368
1369 drm_ioctl_desc_t i810_ioctls[] = {
1370         [DRM_IOCTL_NR(DRM_I810_INIT)] = {i810_dma_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
1371         [DRM_IOCTL_NR(DRM_I810_VERTEX)] = {i810_dma_vertex, DRM_AUTH},
1372         [DRM_IOCTL_NR(DRM_I810_CLEAR)] = {i810_clear_bufs, DRM_AUTH},
1373         [DRM_IOCTL_NR(DRM_I810_FLUSH)] = {i810_flush_ioctl, DRM_AUTH},
1374         [DRM_IOCTL_NR(DRM_I810_GETAGE)] = {i810_getage, DRM_AUTH},
1375         [DRM_IOCTL_NR(DRM_I810_GETBUF)] = {i810_getbuf, DRM_AUTH},
1376         [DRM_IOCTL_NR(DRM_I810_SWAP)] = {i810_swap_bufs, DRM_AUTH},
1377         [DRM_IOCTL_NR(DRM_I810_COPY)] = {i810_copybuf, DRM_AUTH},
1378         [DRM_IOCTL_NR(DRM_I810_DOCOPY)] = {i810_docopy, DRM_AUTH},
1379         [DRM_IOCTL_NR(DRM_I810_OV0INFO)] = {i810_ov0_info, DRM_AUTH},
1380         [DRM_IOCTL_NR(DRM_I810_FSTATUS)] = {i810_fstatus, DRM_AUTH},
1381         [DRM_IOCTL_NR(DRM_I810_OV0FLIP)] = {i810_ov0_flip, DRM_AUTH},
1382         [DRM_IOCTL_NR(DRM_I810_MC)] = {i810_dma_mc, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
1383         [DRM_IOCTL_NR(DRM_I810_RSTATUS)] = {i810_rstatus, DRM_AUTH},
1384         [DRM_IOCTL_NR(DRM_I810_FLIP)] = {i810_flip_bufs, DRM_AUTH}
1385 };
1386
1387 int i810_max_ioctl = DRM_ARRAY_SIZE(i810_ioctls);
1388
1389 /**
1390  * Determine if the device really is AGP or not.
1391  *
1392  * All Intel graphics chipsets are treated as AGP, even if they are really
1393  * PCI-e.
1394  *
1395  * \param dev   The device to be tested.
1396  *
1397  * \returns
1398  * A value of 1 is always retured to indictate every i810 is AGP.
1399  */
1400 int i810_driver_device_is_agp(struct drm_device * dev)
1401 {
1402         return 1;
1403 }