aboutsummaryrefslogtreecommitdiff
path: root/linux/savage_drv.c
blob: 0c5188741a65de2371a7444314d4939c23bf353c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
/*
 * Copyright 1998-2003 VIA Technologies, Inc. All Rights Reserved.
 * Copyright 2001-2003 S3 Graphics, Inc. All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sub license,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
 * VIA, S3 GRAPHICS, AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

#include <linux/config.h>
#include "savage.h"
#include "drmP.h"
#include "savage_drm.h"
#include "savage_drv.h"

#define DRIVER_AUTHOR		"John Zhao, S3 Graphics Inc."

#define DRIVER_NAME		"savage"
#define DRIVER_DESC		"Savage4 Family"
#define DRIVER_DATE		"20011023"

#define DRIVER_MAJOR		1
#define DRIVER_MINOR		0
#define DRIVER_PATCHLEVEL	0

/* Currently Savage4 not implement DMA */
/* mark off by Jiayo Hsu, Oct. 23, 2001*/


#if SAVAGE_CMD_DMA /* Check the 3D driver, and we need to fix this anyway */

#define DRIVER_IOCTLS \
	[DRM_IOCTL_NR(DRM_IOCTL_SAVAGE_ALLOC_CONTINUOUS_MEM)] \
	= {savage_alloc_continuous_mem,1,0},\
	[DRM_IOCTL_NR( DRM_IOCTL_SAVAGE_GET_PHYSICS_ADDRESS)] \
	= {savage_get_physics_address,1,0},\
        [DRM_IOCTL_NR(DRM_IOCTL_SAVAGE_FREE_CONTINUOUS_MEM)]  \
        = {savage_free_cont_mem,1,0}

int savage_alloc_continuous_mem(struct inode *inode, struct file *filp,
		unsigned int cmd, unsigned long arg)
{
  drm_savage_alloc_cont_mem_t cont_mem;	
  unsigned long size,addr;
  void * ret;
  int i;
  mem_map_t *p;
  pgprot_t flags;

  /* add to list */  
  drm_file_t *priv = filp->private_data;
  drm_device_t *dev = priv->dev;
  drm_map_t *map;
  drm_map_list_t *list;

  if (copy_from_user(&cont_mem,(drm_savage_alloc_cont_mem_t *)arg,sizeof(cont_mem)))
    return -EFAULT;
 
  map = DRM(alloc)( sizeof(*map), DRM_MEM_MAPS );
  if ( !map )
    return -ENOMEM;
  
  /*check the parameters*/
  if (cont_mem.size <= 0 )
    return -EINVAL;
  
  size = cont_mem.type * cont_mem.size;
  printk("[drm]JTLIsize = %lu\n",size);
  
  ret = (void *)__get_free_pages(GFP_KERNEL, get_order(size));
  if (ret == NULL)
    {
      printk("Kalloc error\n");
      return 0;
    }
  
  /*set the reserverd flag so that the remap_page_range can map these page*/
  for(i=0,p=virt_to_page(ret);i< size /PAGE_SIZE; i++,p++)
    SetPageReserved(p);
  
  cont_mem.phyaddress = virt_to_bus(ret);
  cont_mem.location = DRM_SAVAGE_MEM_LOCATION_PCI; /* pci only at present*/
  
  
  /*Map the memory to user space*/
  down_write(&current->mm->mmap_sem);
  addr=do_mmap(NULL,0,size,PROT_READ|PROT_WRITE,MAP_PRIVATE,cont_mem.phyaddress);
  if (addr<=0)
    return -EFAULT;
  pgprot_val(flags)=_PAGE_PRESENT | _PAGE_RW |_PAGE_USER ;
  if (remap_page_range(addr,cont_mem.phyaddress,size,flags))
    return -EFAULT;
  up_write(&current->mm->mmap_sem);
  
  for(i=0,p=virt_to_page(ret);i< size /PAGE_SIZE; i++,p++)
    ClearPageReserved(p);
  
  cont_mem.linear = addr;
  
  /*map list*/
  map->handle =  ret; /* to distinguish with other*/
  map->offset = cont_mem.phyaddress;
  map->size = size;
  map->mtrr=-1;
  /*map-flags,type??*/
  
  list = DRM(alloc)(sizeof(*list), DRM_MEM_MAPS);
  if(!list) {
    DRM(free)(map, sizeof(*map), DRM_MEM_MAPS);
    return -EINVAL;
  }
  memset(list, 0, sizeof(*list));
  list->map = map;
  
  down(&dev->struct_sem);
  list_add(&list->head, &dev->maplist->head);
  up(&dev->struct_sem);
  
  if (copy_to_user((drm_savage_alloc_cont_mem_t *)arg,&cont_mem,sizeof(cont_mem)))
    return -EFAULT;

  for(i=0,p=virt_to_page(ret);i< size /PAGE_SIZE; i++,p++)
    atomic_set(&p->count,1);

  return 1;/*success*/  
}

int savage_get_physics_address(struct inode *inode, struct file *filp,
			       unsigned int cmd, unsigned long arg)
{
  
  drm_savage_get_physcis_address_t req;
  unsigned long buf;
  pgd_t *pgd;
  pmd_t *pmd;
  pte_t *pte;
  struct mm_struct *mm;
  
  if (copy_from_user(&req,(drm_savage_get_physcis_address_t *)arg,sizeof(req)))
    return -EFAULT;
  buf = req.v_address;
  
  /*What kind of virtual address ?*/
  if (buf >= (unsigned long)high_memory)
    mm = &init_mm;
  else
    mm = current->mm;
  
#ifdef LINUX_24
  spin_lock(&mm->page_table_lock);
#endif
  
  pgd=pgd_offset(mm,buf);
  pmd=pmd_offset(pgd,buf);
  pte=pte_offset_map(pmd,buf);
  
  if (!pte_present(*pte))
    return -EFAULT;
  
  req.p_address = ((pte_val(*pte) &PAGE_MASK) |( buf&(PAGE_SIZE-1)));
  
  if (copy_to_user((drm_savage_get_physcis_address_t  *)arg,&req,sizeof(req)))
    return -EFAULT;
  return 1;
}

/*free the continuous memory*/
int savage_free_cont_mem(struct inode *inode, struct file *filp,
			       unsigned int cmd, unsigned long arg)
{
  drm_savage_alloc_cont_mem_t cont_mem;	
  unsigned long size;

  /*map  list */  
  drm_file_t *priv = filp->private_data;
  drm_device_t *dev = priv->dev;
  drm_map_t *map;
  struct list_head *list;
  drm_map_list_t *r_list = NULL;

  if (copy_from_user(&cont_mem,(drm_savage_alloc_cont_mem_t *)arg,sizeof(cont_mem)))
    return -EFAULT;
  size = cont_mem.type * cont_mem.size;
  if (size <= 0)
    return -EINVAL;

  /* find the map in the list */
  list_for_each(list,&dev->maplist->head)
    {
      r_list = (drm_map_list_t *) list;
      
      if(r_list->map &&
	 r_list->map->offset == cont_mem.phyaddress )
	 break;   
    }
  /*find none*/
  if(list == (&dev->maplist->head)) {
    up(&dev->struct_sem);
    return -EINVAL;
  }
  map = r_list->map;
  list_del(list);
  DRM(free)(list, sizeof(*list), DRM_MEM_MAPS);

  /*unmap the user space */
#ifdef DO_MUNMAP_4_ARGS
  if ( do_munmap(current->mm,cont_mem.linear,size,1)!=0)
#else
  if ( do_munmap(current->mm,cont_mem.linear,size)!=0)
#endif
    return -EFAULT;
  /*free the page*/
  free_pages((unsigned long)map->handle, get_order(size));

  return 1;
}
#else /* SAVAGE_CMD_DMA */
#define DRIVER_IOCTLS
#endif /* SAVAGE_CMD_DMA */

#if 0

#define DRIVER_IOCTLS							   \
	[DRM_IOCTL_NR(DRM_IOCTL_DMA)]	      = { mga_dma_buffers, 1, 0 }, \
	[DRM_IOCTL_NR(DRM_IOCTL_MGA_INIT)]    = { mga_dma_init,    1, 1 }, \
	[DRM_IOCTL_NR(DRM_IOCTL_MGA_FLUSH)]   = { mga_dma_flush,   1, 0 }, \
	[DRM_IOCTL_NR(DRM_IOCTL_MGA_RESET)]   = { mga_dma_reset,   1, 0 }, \
	[DRM_IOCTL_NR(DRM_IOCTL_MGA_SWAP)]    = { mga_dma_swap,    1, 0 }, \
	[DRM_IOCTL_NR(DRM_IOCTL_MGA_CLEAR)]   = { mga_dma_clear,   1, 0 }, \
	[DRM_IOCTL_NR(DRM_IOCTL_MGA_VERTEX)]  = { mga_dma_vertex,  1, 0 }, \
	[DRM_IOCTL_NR(DRM_IOCTL_MGA_INDICES)] = { mga_dma_indices, 1, 0 }, \
	[DRM_IOCTL_NR(DRM_IOCTL_MGA_ILOAD)]   = { mga_dma_iload,   1, 0 }, \
	[DRM_IOCTL_NR(DRM_IOCTL_MGA_BLIT)]    = { mga_dma_blit,    1, 0 },


#endif /* end #if 0 */

#include "drm_core.h"