[PATCH] mark struct file_operations const 3
[linux-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 drm_buf_t *i810_freelist_get(drm_device_t * dev)
49 {
50         drm_device_dma_t *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                 drm_buf_t *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(drm_device_t * dev, drm_buf_t * 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         drm_file_t *priv = filp->private_data;
91         drm_device_t *dev;
92         drm_i810_private_t *dev_priv;
93         drm_buf_t *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(drm_buf_t * buf, struct file *filp)
124 {
125         drm_file_t *priv = filp->private_data;
126         drm_device_t *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(drm_buf_t * 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(drm_device_t * dev, drm_i810_dma_t * d,
176                                struct file *filp)
177 {
178         drm_buf_t *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(drm_device_t * dev)
206 {
207         drm_device_dma_t *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                         drm_buf_t *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(drm_device_t * 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(drm_device_t * 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(drm_device_t * dev, drm_i810_private_t * dev_priv)
292 {
293         drm_device_dma_t *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                 drm_buf_t *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(drm_device_t * dev,
327                                drm_i810_private_t * dev_priv,
328                                drm_i810_init_t * init)
329 {
330         struct list_head *list;
331
332         memset(dev_priv, 0, sizeof(drm_i810_private_t));
333
334         list_for_each(list, &dev->maplist->head) {
335                 drm_map_list_t *r_list = list_entry(list, drm_map_list_t, head);
336                 if (r_list->map &&
337                     r_list->map->type == _DRM_SHM &&
338                     r_list->map->flags & _DRM_CONTAINS_LOCK) {
339                         dev_priv->sarea_map = r_list->map;
340                         break;
341                 }
342         }
343         if (!dev_priv->sarea_map) {
344                 dev->dev_private = (void *)dev_priv;
345                 i810_dma_cleanup(dev);
346                 DRM_ERROR("can not find sarea!\n");
347                 return -EINVAL;
348         }
349         dev_priv->mmio_map = drm_core_findmap(dev, init->mmio_offset);
350         if (!dev_priv->mmio_map) {
351                 dev->dev_private = (void *)dev_priv;
352                 i810_dma_cleanup(dev);
353                 DRM_ERROR("can not find mmio map!\n");
354                 return -EINVAL;
355         }
356         dev->agp_buffer_token = init->buffers_offset;
357         dev->agp_buffer_map = drm_core_findmap(dev, init->buffers_offset);
358         if (!dev->agp_buffer_map) {
359                 dev->dev_private = (void *)dev_priv;
360                 i810_dma_cleanup(dev);
361                 DRM_ERROR("can not find dma buffer map!\n");
362                 return -EINVAL;
363         }
364
365         dev_priv->sarea_priv = (drm_i810_sarea_t *)
366             ((u8 *) dev_priv->sarea_map->handle + init->sarea_priv_offset);
367
368         dev_priv->ring.Start = init->ring_start;
369         dev_priv->ring.End = init->ring_end;
370         dev_priv->ring.Size = init->ring_size;
371
372         dev_priv->ring.map.offset = dev->agp->base + init->ring_start;
373         dev_priv->ring.map.size = init->ring_size;
374         dev_priv->ring.map.type = _DRM_AGP;
375         dev_priv->ring.map.flags = 0;
376         dev_priv->ring.map.mtrr = 0;
377
378         drm_core_ioremap(&dev_priv->ring.map, dev);
379
380         if (dev_priv->ring.map.handle == NULL) {
381                 dev->dev_private = (void *)dev_priv;
382                 i810_dma_cleanup(dev);
383                 DRM_ERROR("can not ioremap virtual address for"
384                           " ring buffer\n");
385                 return DRM_ERR(ENOMEM);
386         }
387
388         dev_priv->ring.virtual_start = dev_priv->ring.map.handle;
389
390         dev_priv->ring.tail_mask = dev_priv->ring.Size - 1;
391
392         dev_priv->w = init->w;
393         dev_priv->h = init->h;
394         dev_priv->pitch = init->pitch;
395         dev_priv->back_offset = init->back_offset;
396         dev_priv->depth_offset = init->depth_offset;
397         dev_priv->front_offset = init->front_offset;
398
399         dev_priv->overlay_offset = init->overlay_offset;
400         dev_priv->overlay_physical = init->overlay_physical;
401
402         dev_priv->front_di1 = init->front_offset | init->pitch_bits;
403         dev_priv->back_di1 = init->back_offset | init->pitch_bits;
404         dev_priv->zi1 = init->depth_offset | init->pitch_bits;
405
406         /* Program Hardware Status Page */
407         dev_priv->hw_status_page =
408             pci_alloc_consistent(dev->pdev, PAGE_SIZE,
409                                  &dev_priv->dma_status_page);
410         if (!dev_priv->hw_status_page) {
411                 dev->dev_private = (void *)dev_priv;
412                 i810_dma_cleanup(dev);
413                 DRM_ERROR("Can not allocate hardware status page\n");
414                 return -ENOMEM;
415         }
416         memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
417         DRM_DEBUG("hw status page @ %p\n", dev_priv->hw_status_page);
418
419         I810_WRITE(0x02080, dev_priv->dma_status_page);
420         DRM_DEBUG("Enabled hardware status page\n");
421
422         /* Now we need to init our freelist */
423         if (i810_freelist_init(dev, dev_priv) != 0) {
424                 dev->dev_private = (void *)dev_priv;
425                 i810_dma_cleanup(dev);
426                 DRM_ERROR("Not enough space in the status page for"
427                           " the freelist\n");
428                 return -ENOMEM;
429         }
430         dev->dev_private = (void *)dev_priv;
431
432         return 0;
433 }
434
435 /* i810 DRM version 1.1 used a smaller init structure with different
436  * ordering of values than is currently used (drm >= 1.2). There is
437  * no defined way to detect the XFree version to correct this problem,
438  * however by checking using this procedure we can detect the correct
439  * thing to do.
440  *
441  * #1 Read the Smaller init structure from user-space
442  * #2 Verify the overlay_physical is a valid physical address, or NULL
443  *    If it isn't then we have a v1.1 client. Fix up params.
444  *    If it is, then we have a 1.2 client... get the rest of the data.
445  */
446 static int i810_dma_init_compat(drm_i810_init_t * init, unsigned long arg)
447 {
448
449         /* Get v1.1 init data */
450         if (copy_from_user(init, (drm_i810_pre12_init_t __user *) arg,
451                            sizeof(drm_i810_pre12_init_t))) {
452                 return -EFAULT;
453         }
454
455         if ((!init->overlay_physical) || (init->overlay_physical > 4096)) {
456
457                 /* This is a v1.2 client, just get the v1.2 init data */
458                 DRM_INFO("Using POST v1.2 init.\n");
459                 if (copy_from_user(init, (drm_i810_init_t __user *) arg,
460                                    sizeof(drm_i810_init_t))) {
461                         return -EFAULT;
462                 }
463         } else {
464
465                 /* This is a v1.1 client, fix the params */
466                 DRM_INFO("Using PRE v1.2 init.\n");
467                 init->pitch_bits = init->h;
468                 init->pitch = init->w;
469                 init->h = init->overlay_physical;
470                 init->w = init->overlay_offset;
471                 init->overlay_physical = 0;
472                 init->overlay_offset = 0;
473         }
474
475         return 0;
476 }
477
478 static int i810_dma_init(struct inode *inode, struct file *filp,
479                          unsigned int cmd, unsigned long arg)
480 {
481         drm_file_t *priv = filp->private_data;
482         drm_device_t *dev = priv->head->dev;
483         drm_i810_private_t *dev_priv;
484         drm_i810_init_t init;
485         int retcode = 0;
486
487         /* Get only the init func */
488         if (copy_from_user
489             (&init, (void __user *)arg, sizeof(drm_i810_init_func_t)))
490                 return -EFAULT;
491
492         switch (init.func) {
493         case I810_INIT_DMA:
494                 /* This case is for backward compatibility. It
495                  * handles XFree 4.1.0 and 4.2.0, and has to
496                  * do some parameter checking as described below.
497                  * It will someday go away.
498                  */
499                 retcode = i810_dma_init_compat(&init, arg);
500                 if (retcode)
501                         return retcode;
502
503                 dev_priv = drm_alloc(sizeof(drm_i810_private_t),
504                                      DRM_MEM_DRIVER);
505                 if (dev_priv == NULL)
506                         return -ENOMEM;
507                 retcode = i810_dma_initialize(dev, dev_priv, &init);
508                 break;
509
510         default:
511         case I810_INIT_DMA_1_4:
512                 DRM_INFO("Using v1.4 init.\n");
513                 if (copy_from_user(&init, (drm_i810_init_t __user *) arg,
514                                    sizeof(drm_i810_init_t))) {
515                         return -EFAULT;
516                 }
517                 dev_priv = drm_alloc(sizeof(drm_i810_private_t),
518                                      DRM_MEM_DRIVER);
519                 if (dev_priv == NULL)
520                         return -ENOMEM;
521                 retcode = i810_dma_initialize(dev, dev_priv, &init);
522                 break;
523
524         case I810_CLEANUP_DMA:
525                 DRM_INFO("DMA Cleanup\n");
526                 retcode = i810_dma_cleanup(dev);
527                 break;
528         }
529
530         return retcode;
531 }
532
533 /* Most efficient way to verify state for the i810 is as it is
534  * emitted.  Non-conformant state is silently dropped.
535  *
536  * Use 'volatile' & local var tmp to force the emitted values to be
537  * identical to the verified ones.
538  */
539 static void i810EmitContextVerified(drm_device_t * dev,
540                                     volatile unsigned int *code)
541 {
542         drm_i810_private_t *dev_priv = dev->dev_private;
543         int i, j = 0;
544         unsigned int tmp;
545         RING_LOCALS;
546
547         BEGIN_LP_RING(I810_CTX_SETUP_SIZE);
548
549         OUT_RING(GFX_OP_COLOR_FACTOR);
550         OUT_RING(code[I810_CTXREG_CF1]);
551
552         OUT_RING(GFX_OP_STIPPLE);
553         OUT_RING(code[I810_CTXREG_ST1]);
554
555         for (i = 4; i < I810_CTX_SETUP_SIZE; i++) {
556                 tmp = code[i];
557
558                 if ((tmp & (7 << 29)) == (3 << 29) &&
559                     (tmp & (0x1f << 24)) < (0x1d << 24)) {
560                         OUT_RING(tmp);
561                         j++;
562                 } else
563                         printk("constext state dropped!!!\n");
564         }
565
566         if (j & 1)
567                 OUT_RING(0);
568
569         ADVANCE_LP_RING();
570 }
571
572 static void i810EmitTexVerified(drm_device_t * dev, volatile unsigned int *code)
573 {
574         drm_i810_private_t *dev_priv = dev->dev_private;
575         int i, j = 0;
576         unsigned int tmp;
577         RING_LOCALS;
578
579         BEGIN_LP_RING(I810_TEX_SETUP_SIZE);
580
581         OUT_RING(GFX_OP_MAP_INFO);
582         OUT_RING(code[I810_TEXREG_MI1]);
583         OUT_RING(code[I810_TEXREG_MI2]);
584         OUT_RING(code[I810_TEXREG_MI3]);
585
586         for (i = 4; i < I810_TEX_SETUP_SIZE; i++) {
587                 tmp = code[i];
588
589                 if ((tmp & (7 << 29)) == (3 << 29) &&
590                     (tmp & (0x1f << 24)) < (0x1d << 24)) {
591                         OUT_RING(tmp);
592                         j++;
593                 } else
594                         printk("texture state dropped!!!\n");
595         }
596
597         if (j & 1)
598                 OUT_RING(0);
599
600         ADVANCE_LP_RING();
601 }
602
603 /* Need to do some additional checking when setting the dest buffer.
604  */
605 static void i810EmitDestVerified(drm_device_t * dev,
606                                  volatile unsigned int *code)
607 {
608         drm_i810_private_t *dev_priv = dev->dev_private;
609         unsigned int tmp;
610         RING_LOCALS;
611
612         BEGIN_LP_RING(I810_DEST_SETUP_SIZE + 2);
613
614         tmp = code[I810_DESTREG_DI1];
615         if (tmp == dev_priv->front_di1 || tmp == dev_priv->back_di1) {
616                 OUT_RING(CMD_OP_DESTBUFFER_INFO);
617                 OUT_RING(tmp);
618         } else
619                 DRM_DEBUG("bad di1 %x (allow %x or %x)\n",
620                           tmp, dev_priv->front_di1, dev_priv->back_di1);
621
622         /* invarient:
623          */
624         OUT_RING(CMD_OP_Z_BUFFER_INFO);
625         OUT_RING(dev_priv->zi1);
626
627         OUT_RING(GFX_OP_DESTBUFFER_VARS);
628         OUT_RING(code[I810_DESTREG_DV1]);
629
630         OUT_RING(GFX_OP_DRAWRECT_INFO);
631         OUT_RING(code[I810_DESTREG_DR1]);
632         OUT_RING(code[I810_DESTREG_DR2]);
633         OUT_RING(code[I810_DESTREG_DR3]);
634         OUT_RING(code[I810_DESTREG_DR4]);
635         OUT_RING(0);
636
637         ADVANCE_LP_RING();
638 }
639
640 static void i810EmitState(drm_device_t * dev)
641 {
642         drm_i810_private_t *dev_priv = dev->dev_private;
643         drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
644         unsigned int dirty = sarea_priv->dirty;
645
646         DRM_DEBUG("%s %x\n", __FUNCTION__, dirty);
647
648         if (dirty & I810_UPLOAD_BUFFERS) {
649                 i810EmitDestVerified(dev, sarea_priv->BufferState);
650                 sarea_priv->dirty &= ~I810_UPLOAD_BUFFERS;
651         }
652
653         if (dirty & I810_UPLOAD_CTX) {
654                 i810EmitContextVerified(dev, sarea_priv->ContextState);
655                 sarea_priv->dirty &= ~I810_UPLOAD_CTX;
656         }
657
658         if (dirty & I810_UPLOAD_TEX0) {
659                 i810EmitTexVerified(dev, sarea_priv->TexState[0]);
660                 sarea_priv->dirty &= ~I810_UPLOAD_TEX0;
661         }
662
663         if (dirty & I810_UPLOAD_TEX1) {
664                 i810EmitTexVerified(dev, sarea_priv->TexState[1]);
665                 sarea_priv->dirty &= ~I810_UPLOAD_TEX1;
666         }
667 }
668
669 /* need to verify
670  */
671 static void i810_dma_dispatch_clear(drm_device_t * dev, int flags,
672                                     unsigned int clear_color,
673                                     unsigned int clear_zval)
674 {
675         drm_i810_private_t *dev_priv = dev->dev_private;
676         drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
677         int nbox = sarea_priv->nbox;
678         drm_clip_rect_t *pbox = sarea_priv->boxes;
679         int pitch = dev_priv->pitch;
680         int cpp = 2;
681         int i;
682         RING_LOCALS;
683
684         if (dev_priv->current_page == 1) {
685                 unsigned int tmp = flags;
686
687                 flags &= ~(I810_FRONT | I810_BACK);
688                 if (tmp & I810_FRONT)
689                         flags |= I810_BACK;
690                 if (tmp & I810_BACK)
691                         flags |= I810_FRONT;
692         }
693
694         i810_kernel_lost_context(dev);
695
696         if (nbox > I810_NR_SAREA_CLIPRECTS)
697                 nbox = I810_NR_SAREA_CLIPRECTS;
698
699         for (i = 0; i < nbox; i++, pbox++) {
700                 unsigned int x = pbox->x1;
701                 unsigned int y = pbox->y1;
702                 unsigned int width = (pbox->x2 - x) * cpp;
703                 unsigned int height = pbox->y2 - y;
704                 unsigned int start = y * pitch + x * cpp;
705
706                 if (pbox->x1 > pbox->x2 ||
707                     pbox->y1 > pbox->y2 ||
708                     pbox->x2 > dev_priv->w || pbox->y2 > dev_priv->h)
709                         continue;
710
711                 if (flags & I810_FRONT) {
712                         BEGIN_LP_RING(6);
713                         OUT_RING(BR00_BITBLT_CLIENT | BR00_OP_COLOR_BLT | 0x3);
714                         OUT_RING(BR13_SOLID_PATTERN | (0xF0 << 16) | pitch);
715                         OUT_RING((height << 16) | width);
716                         OUT_RING(start);
717                         OUT_RING(clear_color);
718                         OUT_RING(0);
719                         ADVANCE_LP_RING();
720                 }
721
722                 if (flags & I810_BACK) {
723                         BEGIN_LP_RING(6);
724                         OUT_RING(BR00_BITBLT_CLIENT | BR00_OP_COLOR_BLT | 0x3);
725                         OUT_RING(BR13_SOLID_PATTERN | (0xF0 << 16) | pitch);
726                         OUT_RING((height << 16) | width);
727                         OUT_RING(dev_priv->back_offset + start);
728                         OUT_RING(clear_color);
729                         OUT_RING(0);
730                         ADVANCE_LP_RING();
731                 }
732
733                 if (flags & I810_DEPTH) {
734                         BEGIN_LP_RING(6);
735                         OUT_RING(BR00_BITBLT_CLIENT | BR00_OP_COLOR_BLT | 0x3);
736                         OUT_RING(BR13_SOLID_PATTERN | (0xF0 << 16) | pitch);
737                         OUT_RING((height << 16) | width);
738                         OUT_RING(dev_priv->depth_offset + start);
739                         OUT_RING(clear_zval);
740                         OUT_RING(0);
741                         ADVANCE_LP_RING();
742                 }
743         }
744 }
745
746 static void i810_dma_dispatch_swap(drm_device_t * dev)
747 {
748         drm_i810_private_t *dev_priv = dev->dev_private;
749         drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
750         int nbox = sarea_priv->nbox;
751         drm_clip_rect_t *pbox = sarea_priv->boxes;
752         int pitch = dev_priv->pitch;
753         int cpp = 2;
754         int i;
755         RING_LOCALS;
756
757         DRM_DEBUG("swapbuffers\n");
758
759         i810_kernel_lost_context(dev);
760
761         if (nbox > I810_NR_SAREA_CLIPRECTS)
762                 nbox = I810_NR_SAREA_CLIPRECTS;
763
764         for (i = 0; i < nbox; i++, pbox++) {
765                 unsigned int w = pbox->x2 - pbox->x1;
766                 unsigned int h = pbox->y2 - pbox->y1;
767                 unsigned int dst = pbox->x1 * cpp + pbox->y1 * pitch;
768                 unsigned int start = dst;
769
770                 if (pbox->x1 > pbox->x2 ||
771                     pbox->y1 > pbox->y2 ||
772                     pbox->x2 > dev_priv->w || pbox->y2 > dev_priv->h)
773                         continue;
774
775                 BEGIN_LP_RING(6);
776                 OUT_RING(BR00_BITBLT_CLIENT | BR00_OP_SRC_COPY_BLT | 0x4);
777                 OUT_RING(pitch | (0xCC << 16));
778                 OUT_RING((h << 16) | (w * cpp));
779                 if (dev_priv->current_page == 0)
780                         OUT_RING(dev_priv->front_offset + start);
781                 else
782                         OUT_RING(dev_priv->back_offset + start);
783                 OUT_RING(pitch);
784                 if (dev_priv->current_page == 0)
785                         OUT_RING(dev_priv->back_offset + start);
786                 else
787                         OUT_RING(dev_priv->front_offset + start);
788                 ADVANCE_LP_RING();
789         }
790 }
791
792 static void i810_dma_dispatch_vertex(drm_device_t * dev,
793                                      drm_buf_t * buf, int discard, int used)
794 {
795         drm_i810_private_t *dev_priv = dev->dev_private;
796         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
797         drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
798         drm_clip_rect_t *box = sarea_priv->boxes;
799         int nbox = sarea_priv->nbox;
800         unsigned long address = (unsigned long)buf->bus_address;
801         unsigned long start = address - dev->agp->base;
802         int i = 0;
803         RING_LOCALS;
804
805         i810_kernel_lost_context(dev);
806
807         if (nbox > I810_NR_SAREA_CLIPRECTS)
808                 nbox = I810_NR_SAREA_CLIPRECTS;
809
810         if (used > 4 * 1024)
811                 used = 0;
812
813         if (sarea_priv->dirty)
814                 i810EmitState(dev);
815
816         if (buf_priv->currently_mapped == I810_BUF_MAPPED) {
817                 unsigned int prim = (sarea_priv->vertex_prim & PR_MASK);
818
819                 *(u32 *) buf_priv->kernel_virtual =
820                     ((GFX_OP_PRIMITIVE | prim | ((used / 4) - 2)));
821
822                 if (used & 4) {
823                         *(u32 *) ((char *) buf_priv->kernel_virtual + used) = 0;
824                         used += 4;
825                 }
826
827                 i810_unmap_buffer(buf);
828         }
829
830         if (used) {
831                 do {
832                         if (i < nbox) {
833                                 BEGIN_LP_RING(4);
834                                 OUT_RING(GFX_OP_SCISSOR | SC_UPDATE_SCISSOR |
835                                          SC_ENABLE);
836                                 OUT_RING(GFX_OP_SCISSOR_INFO);
837                                 OUT_RING(box[i].x1 | (box[i].y1 << 16));
838                                 OUT_RING((box[i].x2 -
839                                           1) | ((box[i].y2 - 1) << 16));
840                                 ADVANCE_LP_RING();
841                         }
842
843                         BEGIN_LP_RING(4);
844                         OUT_RING(CMD_OP_BATCH_BUFFER);
845                         OUT_RING(start | BB1_PROTECTED);
846                         OUT_RING(start + used - 4);
847                         OUT_RING(0);
848                         ADVANCE_LP_RING();
849
850                 } while (++i < nbox);
851         }
852
853         if (discard) {
854                 dev_priv->counter++;
855
856                 (void)cmpxchg(buf_priv->in_use, I810_BUF_CLIENT,
857                               I810_BUF_HARDWARE);
858
859                 BEGIN_LP_RING(8);
860                 OUT_RING(CMD_STORE_DWORD_IDX);
861                 OUT_RING(20);
862                 OUT_RING(dev_priv->counter);
863                 OUT_RING(CMD_STORE_DWORD_IDX);
864                 OUT_RING(buf_priv->my_use_idx);
865                 OUT_RING(I810_BUF_FREE);
866                 OUT_RING(CMD_REPORT_HEAD);
867                 OUT_RING(0);
868                 ADVANCE_LP_RING();
869         }
870 }
871
872 static void i810_dma_dispatch_flip(drm_device_t * dev)
873 {
874         drm_i810_private_t *dev_priv = dev->dev_private;
875         int pitch = dev_priv->pitch;
876         RING_LOCALS;
877
878         DRM_DEBUG("%s: page=%d pfCurrentPage=%d\n",
879                   __FUNCTION__,
880                   dev_priv->current_page,
881                   dev_priv->sarea_priv->pf_current_page);
882
883         i810_kernel_lost_context(dev);
884
885         BEGIN_LP_RING(2);
886         OUT_RING(INST_PARSER_CLIENT | INST_OP_FLUSH | INST_FLUSH_MAP_CACHE);
887         OUT_RING(0);
888         ADVANCE_LP_RING();
889
890         BEGIN_LP_RING(I810_DEST_SETUP_SIZE + 2);
891         /* On i815 at least ASYNC is buggy */
892         /* pitch<<5 is from 11.2.8 p158,
893            its the pitch / 8 then left shifted 8,
894            so (pitch >> 3) << 8 */
895         OUT_RING(CMD_OP_FRONTBUFFER_INFO | (pitch << 5) /*| ASYNC_FLIP */ );
896         if (dev_priv->current_page == 0) {
897                 OUT_RING(dev_priv->back_offset);
898                 dev_priv->current_page = 1;
899         } else {
900                 OUT_RING(dev_priv->front_offset);
901                 dev_priv->current_page = 0;
902         }
903         OUT_RING(0);
904         ADVANCE_LP_RING();
905
906         BEGIN_LP_RING(2);
907         OUT_RING(CMD_OP_WAIT_FOR_EVENT | WAIT_FOR_PLANE_A_FLIP);
908         OUT_RING(0);
909         ADVANCE_LP_RING();
910
911         /* Increment the frame counter.  The client-side 3D driver must
912          * throttle the framerate by waiting for this value before
913          * performing the swapbuffer ioctl.
914          */
915         dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
916
917 }
918
919 static void i810_dma_quiescent(drm_device_t * dev)
920 {
921         drm_i810_private_t *dev_priv = dev->dev_private;
922         RING_LOCALS;
923
924 /*      printk("%s\n", __FUNCTION__); */
925
926         i810_kernel_lost_context(dev);
927
928         BEGIN_LP_RING(4);
929         OUT_RING(INST_PARSER_CLIENT | INST_OP_FLUSH | INST_FLUSH_MAP_CACHE);
930         OUT_RING(CMD_REPORT_HEAD);
931         OUT_RING(0);
932         OUT_RING(0);
933         ADVANCE_LP_RING();
934
935         i810_wait_ring(dev, dev_priv->ring.Size - 8);
936 }
937
938 static int i810_flush_queue(drm_device_t * dev)
939 {
940         drm_i810_private_t *dev_priv = dev->dev_private;
941         drm_device_dma_t *dma = dev->dma;
942         int i, ret = 0;
943         RING_LOCALS;
944
945 /*      printk("%s\n", __FUNCTION__); */
946
947         i810_kernel_lost_context(dev);
948
949         BEGIN_LP_RING(2);
950         OUT_RING(CMD_REPORT_HEAD);
951         OUT_RING(0);
952         ADVANCE_LP_RING();
953
954         i810_wait_ring(dev, dev_priv->ring.Size - 8);
955
956         for (i = 0; i < dma->buf_count; i++) {
957                 drm_buf_t *buf = dma->buflist[i];
958                 drm_i810_buf_priv_t *buf_priv = buf->dev_private;
959
960                 int used = cmpxchg(buf_priv->in_use, I810_BUF_HARDWARE,
961                                    I810_BUF_FREE);
962
963                 if (used == I810_BUF_HARDWARE)
964                         DRM_DEBUG("reclaimed from HARDWARE\n");
965                 if (used == I810_BUF_CLIENT)
966                         DRM_DEBUG("still on client\n");
967         }
968
969         return ret;
970 }
971
972 /* Must be called with the lock held */
973 static void i810_reclaim_buffers(drm_device_t * dev, struct file *filp)
974 {
975         drm_device_dma_t *dma = dev->dma;
976         int i;
977
978         if (!dma)
979                 return;
980         if (!dev->dev_private)
981                 return;
982         if (!dma->buflist)
983                 return;
984
985         i810_flush_queue(dev);
986
987         for (i = 0; i < dma->buf_count; i++) {
988                 drm_buf_t *buf = dma->buflist[i];
989                 drm_i810_buf_priv_t *buf_priv = buf->dev_private;
990
991                 if (buf->filp == filp && buf_priv) {
992                         int used = cmpxchg(buf_priv->in_use, I810_BUF_CLIENT,
993                                            I810_BUF_FREE);
994
995                         if (used == I810_BUF_CLIENT)
996                                 DRM_DEBUG("reclaimed from client\n");
997                         if (buf_priv->currently_mapped == I810_BUF_MAPPED)
998                                 buf_priv->currently_mapped = I810_BUF_UNMAPPED;
999                 }
1000         }
1001 }
1002
1003 static int i810_flush_ioctl(struct inode *inode, struct file *filp,
1004                             unsigned int cmd, unsigned long arg)
1005 {
1006         drm_file_t *priv = filp->private_data;
1007         drm_device_t *dev = priv->head->dev;
1008
1009         LOCK_TEST_WITH_RETURN(dev, filp);
1010
1011         i810_flush_queue(dev);
1012         return 0;
1013 }
1014
1015 static int i810_dma_vertex(struct inode *inode, struct file *filp,
1016                            unsigned int cmd, unsigned long arg)
1017 {
1018         drm_file_t *priv = filp->private_data;
1019         drm_device_t *dev = priv->head->dev;
1020         drm_device_dma_t *dma = dev->dma;
1021         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1022         u32 *hw_status = dev_priv->hw_status_page;
1023         drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
1024             dev_priv->sarea_priv;
1025         drm_i810_vertex_t vertex;
1026
1027         if (copy_from_user
1028             (&vertex, (drm_i810_vertex_t __user *) arg, sizeof(vertex)))
1029                 return -EFAULT;
1030
1031         LOCK_TEST_WITH_RETURN(dev, filp);
1032
1033         DRM_DEBUG("i810 dma vertex, idx %d used %d discard %d\n",
1034                   vertex.idx, vertex.used, vertex.discard);
1035
1036         if (vertex.idx < 0 || vertex.idx > dma->buf_count)
1037                 return -EINVAL;
1038
1039         i810_dma_dispatch_vertex(dev,
1040                                  dma->buflist[vertex.idx],
1041                                  vertex.discard, vertex.used);
1042
1043         atomic_add(vertex.used, &dev->counts[_DRM_STAT_SECONDARY]);
1044         atomic_inc(&dev->counts[_DRM_STAT_DMA]);
1045         sarea_priv->last_enqueue = dev_priv->counter - 1;
1046         sarea_priv->last_dispatch = (int)hw_status[5];
1047
1048         return 0;
1049 }
1050
1051 static int i810_clear_bufs(struct inode *inode, struct file *filp,
1052                            unsigned int cmd, unsigned long arg)
1053 {
1054         drm_file_t *priv = filp->private_data;
1055         drm_device_t *dev = priv->head->dev;
1056         drm_i810_clear_t clear;
1057
1058         if (copy_from_user
1059             (&clear, (drm_i810_clear_t __user *) arg, sizeof(clear)))
1060                 return -EFAULT;
1061
1062         LOCK_TEST_WITH_RETURN(dev, filp);
1063
1064         /* GH: Someone's doing nasty things... */
1065         if (!dev->dev_private) {
1066                 return -EINVAL;
1067         }
1068
1069         i810_dma_dispatch_clear(dev, clear.flags,
1070                                 clear.clear_color, clear.clear_depth);
1071         return 0;
1072 }
1073
1074 static int i810_swap_bufs(struct inode *inode, struct file *filp,
1075                           unsigned int cmd, unsigned long arg)
1076 {
1077         drm_file_t *priv = filp->private_data;
1078         drm_device_t *dev = priv->head->dev;
1079
1080         DRM_DEBUG("i810_swap_bufs\n");
1081
1082         LOCK_TEST_WITH_RETURN(dev, filp);
1083
1084         i810_dma_dispatch_swap(dev);
1085         return 0;
1086 }
1087
1088 static int i810_getage(struct inode *inode, struct file *filp, unsigned int cmd,
1089                        unsigned long arg)
1090 {
1091         drm_file_t *priv = filp->private_data;
1092         drm_device_t *dev = priv->head->dev;
1093         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1094         u32 *hw_status = dev_priv->hw_status_page;
1095         drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
1096             dev_priv->sarea_priv;
1097
1098         sarea_priv->last_dispatch = (int)hw_status[5];
1099         return 0;
1100 }
1101
1102 static int i810_getbuf(struct inode *inode, struct file *filp, unsigned int cmd,
1103                        unsigned long arg)
1104 {
1105         drm_file_t *priv = filp->private_data;
1106         drm_device_t *dev = priv->head->dev;
1107         int retcode = 0;
1108         drm_i810_dma_t d;
1109         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1110         u32 *hw_status = dev_priv->hw_status_page;
1111         drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
1112             dev_priv->sarea_priv;
1113
1114         if (copy_from_user(&d, (drm_i810_dma_t __user *) arg, sizeof(d)))
1115                 return -EFAULT;
1116
1117         LOCK_TEST_WITH_RETURN(dev, filp);
1118
1119         d.granted = 0;
1120
1121         retcode = i810_dma_get_buffer(dev, &d, filp);
1122
1123         DRM_DEBUG("i810_dma: %d returning %d, granted = %d\n",
1124                   current->pid, retcode, d.granted);
1125
1126         if (copy_to_user((drm_dma_t __user *) arg, &d, sizeof(d)))
1127                 return -EFAULT;
1128         sarea_priv->last_dispatch = (int)hw_status[5];
1129
1130         return retcode;
1131 }
1132
1133 static int i810_copybuf(struct inode *inode,
1134                         struct file *filp, unsigned int cmd, unsigned long arg)
1135 {
1136         /* Never copy - 2.4.x doesn't need it */
1137         return 0;
1138 }
1139
1140 static int i810_docopy(struct inode *inode, struct file *filp, unsigned int cmd,
1141                        unsigned long arg)
1142 {
1143         /* Never copy - 2.4.x doesn't need it */
1144         return 0;
1145 }
1146
1147 static void i810_dma_dispatch_mc(drm_device_t * dev, drm_buf_t * buf, int used,
1148                                  unsigned int last_render)
1149 {
1150         drm_i810_private_t *dev_priv = dev->dev_private;
1151         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
1152         drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
1153         unsigned long address = (unsigned long)buf->bus_address;
1154         unsigned long start = address - dev->agp->base;
1155         int u;
1156         RING_LOCALS;
1157
1158         i810_kernel_lost_context(dev);
1159
1160         u = cmpxchg(buf_priv->in_use, I810_BUF_CLIENT, I810_BUF_HARDWARE);
1161         if (u != I810_BUF_CLIENT) {
1162                 DRM_DEBUG("MC found buffer that isn't mine!\n");
1163         }
1164
1165         if (used > 4 * 1024)
1166                 used = 0;
1167
1168         sarea_priv->dirty = 0x7f;
1169
1170         DRM_DEBUG("dispatch mc addr 0x%lx, used 0x%x\n", address, used);
1171
1172         dev_priv->counter++;
1173         DRM_DEBUG("dispatch counter : %ld\n", dev_priv->counter);
1174         DRM_DEBUG("i810_dma_dispatch_mc\n");
1175         DRM_DEBUG("start : %lx\n", start);
1176         DRM_DEBUG("used : %d\n", used);
1177         DRM_DEBUG("start + used - 4 : %ld\n", start + used - 4);
1178
1179         if (buf_priv->currently_mapped == I810_BUF_MAPPED) {
1180                 if (used & 4) {
1181                         *(u32 *) ((char *) buf_priv->virtual + used) = 0;
1182                         used += 4;
1183                 }
1184
1185                 i810_unmap_buffer(buf);
1186         }
1187         BEGIN_LP_RING(4);
1188         OUT_RING(CMD_OP_BATCH_BUFFER);
1189         OUT_RING(start | BB1_PROTECTED);
1190         OUT_RING(start + used - 4);
1191         OUT_RING(0);
1192         ADVANCE_LP_RING();
1193
1194         BEGIN_LP_RING(8);
1195         OUT_RING(CMD_STORE_DWORD_IDX);
1196         OUT_RING(buf_priv->my_use_idx);
1197         OUT_RING(I810_BUF_FREE);
1198         OUT_RING(0);
1199
1200         OUT_RING(CMD_STORE_DWORD_IDX);
1201         OUT_RING(16);
1202         OUT_RING(last_render);
1203         OUT_RING(0);
1204         ADVANCE_LP_RING();
1205 }
1206
1207 static int i810_dma_mc(struct inode *inode, struct file *filp,
1208                        unsigned int cmd, unsigned long arg)
1209 {
1210         drm_file_t *priv = filp->private_data;
1211         drm_device_t *dev = priv->head->dev;
1212         drm_device_dma_t *dma = dev->dma;
1213         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1214         u32 *hw_status = dev_priv->hw_status_page;
1215         drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
1216             dev_priv->sarea_priv;
1217         drm_i810_mc_t mc;
1218
1219         if (copy_from_user(&mc, (drm_i810_mc_t __user *) arg, sizeof(mc)))
1220                 return -EFAULT;
1221
1222         LOCK_TEST_WITH_RETURN(dev, filp);
1223
1224         if (mc.idx >= dma->buf_count || mc.idx < 0)
1225                 return -EINVAL;
1226
1227         i810_dma_dispatch_mc(dev, dma->buflist[mc.idx], mc.used,
1228                              mc.last_render);
1229
1230         atomic_add(mc.used, &dev->counts[_DRM_STAT_SECONDARY]);
1231         atomic_inc(&dev->counts[_DRM_STAT_DMA]);
1232         sarea_priv->last_enqueue = dev_priv->counter - 1;
1233         sarea_priv->last_dispatch = (int)hw_status[5];
1234
1235         return 0;
1236 }
1237
1238 static int i810_rstatus(struct inode *inode, struct file *filp,
1239                         unsigned int cmd, unsigned long arg)
1240 {
1241         drm_file_t *priv = filp->private_data;
1242         drm_device_t *dev = priv->head->dev;
1243         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1244
1245         return (int)(((u32 *) (dev_priv->hw_status_page))[4]);
1246 }
1247
1248 static int i810_ov0_info(struct inode *inode, struct file *filp,
1249                          unsigned int cmd, unsigned long arg)
1250 {
1251         drm_file_t *priv = filp->private_data;
1252         drm_device_t *dev = priv->head->dev;
1253         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1254         drm_i810_overlay_t data;
1255
1256         data.offset = dev_priv->overlay_offset;
1257         data.physical = dev_priv->overlay_physical;
1258         if (copy_to_user
1259             ((drm_i810_overlay_t __user *) arg, &data, sizeof(data)))
1260                 return -EFAULT;
1261         return 0;
1262 }
1263
1264 static int i810_fstatus(struct inode *inode, struct file *filp,
1265                         unsigned int cmd, unsigned long arg)
1266 {
1267         drm_file_t *priv = filp->private_data;
1268         drm_device_t *dev = priv->head->dev;
1269         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1270
1271         LOCK_TEST_WITH_RETURN(dev, filp);
1272
1273         return I810_READ(0x30008);
1274 }
1275
1276 static int i810_ov0_flip(struct inode *inode, struct file *filp,
1277                          unsigned int cmd, unsigned long arg)
1278 {
1279         drm_file_t *priv = filp->private_data;
1280         drm_device_t *dev = priv->head->dev;
1281         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1282
1283         LOCK_TEST_WITH_RETURN(dev, filp);
1284
1285         //Tell the overlay to update
1286         I810_WRITE(0x30000, dev_priv->overlay_physical | 0x80000000);
1287
1288         return 0;
1289 }
1290
1291 /* Not sure why this isn't set all the time:
1292  */
1293 static void i810_do_init_pageflip(drm_device_t * dev)
1294 {
1295         drm_i810_private_t *dev_priv = dev->dev_private;
1296
1297         DRM_DEBUG("%s\n", __FUNCTION__);
1298         dev_priv->page_flipping = 1;
1299         dev_priv->current_page = 0;
1300         dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
1301 }
1302
1303 static int i810_do_cleanup_pageflip(drm_device_t * dev)
1304 {
1305         drm_i810_private_t *dev_priv = dev->dev_private;
1306
1307         DRM_DEBUG("%s\n", __FUNCTION__);
1308         if (dev_priv->current_page != 0)
1309                 i810_dma_dispatch_flip(dev);
1310
1311         dev_priv->page_flipping = 0;
1312         return 0;
1313 }
1314
1315 static int i810_flip_bufs(struct inode *inode, struct file *filp,
1316                           unsigned int cmd, unsigned long arg)
1317 {
1318         drm_file_t *priv = filp->private_data;
1319         drm_device_t *dev = priv->head->dev;
1320         drm_i810_private_t *dev_priv = dev->dev_private;
1321
1322         DRM_DEBUG("%s\n", __FUNCTION__);
1323
1324         LOCK_TEST_WITH_RETURN(dev, filp);
1325
1326         if (!dev_priv->page_flipping)
1327                 i810_do_init_pageflip(dev);
1328
1329         i810_dma_dispatch_flip(dev);
1330         return 0;
1331 }
1332
1333 int i810_driver_load(drm_device_t *dev, unsigned long flags)
1334 {
1335         /* i810 has 4 more counters */
1336         dev->counters += 4;
1337         dev->types[6] = _DRM_STAT_IRQ;
1338         dev->types[7] = _DRM_STAT_PRIMARY;
1339         dev->types[8] = _DRM_STAT_SECONDARY;
1340         dev->types[9] = _DRM_STAT_DMA;
1341
1342         return 0;
1343 }
1344
1345 void i810_driver_lastclose(drm_device_t * dev)
1346 {
1347         i810_dma_cleanup(dev);
1348 }
1349
1350 void i810_driver_preclose(drm_device_t * dev, DRMFILE filp)
1351 {
1352         if (dev->dev_private) {
1353                 drm_i810_private_t *dev_priv = dev->dev_private;
1354                 if (dev_priv->page_flipping) {
1355                         i810_do_cleanup_pageflip(dev);
1356                 }
1357         }
1358 }
1359
1360 void i810_driver_reclaim_buffers_locked(drm_device_t * dev, struct file *filp)
1361 {
1362         i810_reclaim_buffers(dev, filp);
1363 }
1364
1365 int i810_driver_dma_quiescent(drm_device_t * dev)
1366 {
1367         i810_dma_quiescent(dev);
1368         return 0;
1369 }
1370
1371 drm_ioctl_desc_t i810_ioctls[] = {
1372         [DRM_IOCTL_NR(DRM_I810_INIT)] = {i810_dma_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
1373         [DRM_IOCTL_NR(DRM_I810_VERTEX)] = {i810_dma_vertex, DRM_AUTH},
1374         [DRM_IOCTL_NR(DRM_I810_CLEAR)] = {i810_clear_bufs, DRM_AUTH},
1375         [DRM_IOCTL_NR(DRM_I810_FLUSH)] = {i810_flush_ioctl, DRM_AUTH},
1376         [DRM_IOCTL_NR(DRM_I810_GETAGE)] = {i810_getage, DRM_AUTH},
1377         [DRM_IOCTL_NR(DRM_I810_GETBUF)] = {i810_getbuf, DRM_AUTH},
1378         [DRM_IOCTL_NR(DRM_I810_SWAP)] = {i810_swap_bufs, DRM_AUTH},
1379         [DRM_IOCTL_NR(DRM_I810_COPY)] = {i810_copybuf, DRM_AUTH},
1380         [DRM_IOCTL_NR(DRM_I810_DOCOPY)] = {i810_docopy, DRM_AUTH},
1381         [DRM_IOCTL_NR(DRM_I810_OV0INFO)] = {i810_ov0_info, DRM_AUTH},
1382         [DRM_IOCTL_NR(DRM_I810_FSTATUS)] = {i810_fstatus, DRM_AUTH},
1383         [DRM_IOCTL_NR(DRM_I810_OV0FLIP)] = {i810_ov0_flip, DRM_AUTH},
1384         [DRM_IOCTL_NR(DRM_I810_MC)] = {i810_dma_mc, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
1385         [DRM_IOCTL_NR(DRM_I810_RSTATUS)] = {i810_rstatus, DRM_AUTH},
1386         [DRM_IOCTL_NR(DRM_I810_FLIP)] = {i810_flip_bufs, DRM_AUTH}
1387 };
1388
1389 int i810_max_ioctl = DRM_ARRAY_SIZE(i810_ioctls);
1390
1391 /**
1392  * Determine if the device really is AGP or not.
1393  *
1394  * All Intel graphics chipsets are treated as AGP, even if they are really
1395  * PCI-e.
1396  *
1397  * \param dev   The device to be tested.
1398  *
1399  * \returns
1400  * A value of 1 is always retured to indictate every i810 is AGP.
1401  */
1402 int i810_driver_device_is_agp(drm_device_t * dev)
1403 {
1404         return 1;
1405 }