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agp.h
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1 /*
2  * AGPGART
3  * Copyright (C) 2004 Silicon Graphics, Inc.
4  * Copyright (C) 2002-2004 Dave Jones
5  * Copyright (C) 1999 Jeff Hartmann
6  * Copyright (C) 1999 Precision Insight, Inc.
7  * Copyright (C) 1999 Xi Graphics, Inc.
8  *
9  * Permission is hereby granted, free of charge, to any person obtaining a
10  * copy of this software and associated documentation files (the "Software"),
11  * to deal in the Software without restriction, including without limitation
12  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
13  * and/or sell copies of the Software, and to permit persons to whom the
14  * Software is furnished to do so, subject to the following conditions:
15  *
16  * The above copyright notice and this permission notice shall be included
17  * in all copies or substantial portions of the Software.
18  *
19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22  * JEFF HARTMANN, OR ANY OTHER CONTRIBUTORS BE LIABLE FOR ANY CLAIM,
23  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
24  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
25  * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26  *
27  */
28 
29 #ifndef _AGP_BACKEND_PRIV_H
30 #define _AGP_BACKEND_PRIV_H 1
31 
32 #include <asm/agp.h> /* for flush_agp_cache() */
33 
34 #define PFX "agpgart: "
35 
36 //#define AGP_DEBUG 1
37 #ifdef AGP_DEBUG
38 #define DBG(x,y...) printk (KERN_DEBUG PFX "%s: " x "\n", __func__ , ## y)
39 #else
40 #define DBG(x,y...) do { } while (0)
41 #endif
42 
43 extern struct agp_bridge_data *agp_bridge;
44 
51 };
52 
53 struct gatt_mask {
54  unsigned long mask;
56  /* totally device specific, for integrated chipsets that
57  * might have different types of memory masks. For other
58  * devices this will probably be ignored */
59 };
60 
61 #define AGP_PAGE_DESTROY_UNMAP 1
62 #define AGP_PAGE_DESTROY_FREE 2
63 
65  int size;
69 };
70 
72  int size;
76 };
77 
79  int size;
83 };
84 
86  int size;
89 };
90 
92  int size;
95 };
96 
98  struct module *owner;
99  const void *aperture_sizes;
104  const struct gatt_mask *masks;
109  void (*tlb_flush)(struct agp_memory *);
110  unsigned long (*mask_memory)(struct agp_bridge_data *, dma_addr_t, int);
116  struct agp_memory *(*alloc_by_type) (size_t, int);
118  struct page *(*agp_alloc_page)(struct agp_bridge_data *);
120  void (*agp_destroy_page)(struct page *, int flags);
123 };
124 
126  const struct agp_version *version;
127  const struct agp_bridge_driver *driver;
128  const struct vm_operations_struct *vm_ops;
132  struct pci_dev *dev;
135  unsigned long scratch_page;
138  unsigned long gart_bus_addr;
139  unsigned long gatt_bus_addr;
142  unsigned long *key_list;
145  int max_memory_agp; /* in number of pages */
147  int capndx;
148  int flags;
151  struct list_head list;
153  /* list of agp_memory mapped to the aperture */
156 };
157 
158 #define KB(x) ((x) * 1024)
159 #define MB(x) (KB (KB (x)))
160 #define GB(x) (MB (KB (x)))
161 
162 #define A_SIZE_8(x) ((struct aper_size_info_8 *) x)
163 #define A_SIZE_16(x) ((struct aper_size_info_16 *) x)
164 #define A_SIZE_32(x) ((struct aper_size_info_32 *) x)
165 #define A_SIZE_LVL2(x) ((struct aper_size_info_lvl2 *) x)
166 #define A_SIZE_FIX(x) ((struct aper_size_info_fixed *) x)
167 #define A_IDX8(bridge) (A_SIZE_8((bridge)->driver->aperture_sizes) + i)
168 #define A_IDX16(bridge) (A_SIZE_16((bridge)->driver->aperture_sizes) + i)
169 #define A_IDX32(bridge) (A_SIZE_32((bridge)->driver->aperture_sizes) + i)
170 #define MAXKEY (4096 * 32)
171 
172 #define PGE_EMPTY(b, p) (!(p) || (p) == (unsigned long) (b)->scratch_page)
173 
174 
176  unsigned short device_id; /* first, to make table easier to read */
178  const char *chipset_name;
179  int (*chipset_setup) (struct pci_dev *pdev); /* used to override generic */
180 };
181 
182 /* Driver registration */
183 struct agp_bridge_data *agp_alloc_bridge(void);
184 void agp_put_bridge(struct agp_bridge_data *bridge);
185 int agp_add_bridge(struct agp_bridge_data *bridge);
186 void agp_remove_bridge(struct agp_bridge_data *bridge);
187 
188 /* Frontend routines. */
189 int agp_frontend_initialize(void);
190 void agp_frontend_cleanup(void);
191 
192 /* Generic routines. */
193 void agp_generic_enable(struct agp_bridge_data *bridge, u32 mode);
195 int agp_generic_free_gatt_table(struct agp_bridge_data *bridge);
196 struct agp_memory *agp_create_memory(int scratch_pages);
201 struct page *agp_generic_alloc_page(struct agp_bridge_data *bridge);
202 int agp_generic_alloc_pages(struct agp_bridge_data *agp_bridge,
203  struct agp_memory *memory, size_t page_count);
204 void agp_generic_destroy_page(struct page *page, int flags);
206 void agp_free_key(int key);
207 int agp_num_entries(void);
209 void agp_device_command(u32 command, bool agp_v3);
210 int agp_3_5_enable(struct agp_bridge_data *bridge);
211 void global_cache_flush(void);
212 void get_agp_version(struct agp_bridge_data *bridge);
213 unsigned long agp_generic_mask_memory(struct agp_bridge_data *bridge,
214  dma_addr_t phys, int type);
216  int type);
217 struct agp_bridge_data *agp_generic_find_bridge(struct pci_dev *pdev);
218 
219 /* generic functions for user-populated AGP memory types */
220 struct agp_memory *agp_generic_alloc_user(size_t page_count, int type);
221 void agp_alloc_page_array(size_t size, struct agp_memory *mem);
222 void agp_free_page_array(struct agp_memory *mem);
223 
224 
225 /* generic routines for agp>=3 */
226 int agp3_generic_fetch_size(void);
227 void agp3_generic_tlbflush(struct agp_memory *mem);
228 int agp3_generic_configure(void);
229 void agp3_generic_cleanup(void);
230 
231 /* aperture sizes have been standardised since v3 */
232 #define AGP_GENERIC_SIZES_ENTRIES 11
233 extern const struct aper_size_info_16 agp3_generic_sizes[];
234 
235 extern int agp_off;
236 extern int agp_try_unsupported_boot;
237 
238 long compat_agp_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
239 
240 /* Chipset independent registers (from AGP Spec) */
241 #define AGP_APBASE 0x10
242 
243 #define AGPSTAT 0x4
244 #define AGPCMD 0x8
245 #define AGPNISTAT 0xc
246 #define AGPCTRL 0x10
247 #define AGPAPSIZE 0x14
248 #define AGPNEPG 0x16
249 #define AGPGARTLO 0x18
250 #define AGPGARTHI 0x1c
251 #define AGPNICMD 0x20
252 
253 #define AGP_MAJOR_VERSION_SHIFT (20)
254 #define AGP_MINOR_VERSION_SHIFT (16)
255 
256 #define AGPSTAT_RQ_DEPTH (0xff000000)
257 #define AGPSTAT_RQ_DEPTH_SHIFT 24
258 
259 #define AGPSTAT_CAL_MASK (1<<12|1<<11|1<<10)
260 #define AGPSTAT_ARQSZ (1<<15|1<<14|1<<13)
261 #define AGPSTAT_ARQSZ_SHIFT 13
262 
263 #define AGPSTAT_SBA (1<<9)
264 #define AGPSTAT_AGP_ENABLE (1<<8)
265 #define AGPSTAT_FW (1<<4)
266 #define AGPSTAT_MODE_3_0 (1<<3)
267 
268 #define AGPSTAT2_1X (1<<0)
269 #define AGPSTAT2_2X (1<<1)
270 #define AGPSTAT2_4X (1<<2)
271 
272 #define AGPSTAT3_RSVD (1<<2)
273 #define AGPSTAT3_8X (1<<1)
274 #define AGPSTAT3_4X (1)
275 
276 #define AGPCTRL_APERENB (1<<8)
277 #define AGPCTRL_GTLBEN (1<<7)
278 
279 #define AGP2_RESERVED_MASK 0x00fffcc8
280 #define AGP3_RESERVED_MASK 0x00ff00c4
281 
282 #define AGP_ERRATA_FASTWRITES 1<<0
283 #define AGP_ERRATA_SBA 1<<1
284 #define AGP_ERRATA_1X 1<<2
285 
286 #endif /* _AGP_BACKEND_PRIV_H */