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 | |
45 | enum aper_size_type { |
46 | U8_APER_SIZE, |
47 | U16_APER_SIZE, |
48 | U32_APER_SIZE, |
49 | LVL2_APER_SIZE, |
50 | FIXED_APER_SIZE |
51 | }; |
52 | |
53 | struct gatt_mask { |
54 | unsigned long mask; |
55 | u32 type; |
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 | |
64 | struct aper_size_info_8 { |
65 | int size; |
66 | int num_entries; |
67 | int page_order; |
68 | u8 size_value; |
69 | }; |
70 | |
71 | struct aper_size_info_16 { |
72 | int size; |
73 | int num_entries; |
74 | int page_order; |
75 | u16 size_value; |
76 | }; |
77 | |
78 | struct aper_size_info_32 { |
79 | int size; |
80 | int num_entries; |
81 | int page_order; |
82 | u32 size_value; |
83 | }; |
84 | |
85 | struct aper_size_info_lvl2 { |
86 | int size; |
87 | int num_entries; |
88 | u32 size_value; |
89 | }; |
90 | |
91 | struct aper_size_info_fixed { |
92 | int size; |
93 | int num_entries; |
94 | int page_order; |
95 | }; |
96 | |
97 | struct agp_bridge_driver { |
98 | struct module *owner; |
99 | const void *aperture_sizes; |
100 | int num_aperture_sizes; |
101 | enum aper_size_type size_type; |
102 | bool cant_use_aperture; |
103 | bool needs_scratch_page; |
104 | const struct gatt_mask *masks; |
105 | int (*fetch_size)(void); |
106 | int (*configure)(void); |
107 | void (*agp_enable)(struct agp_bridge_data *, u32); |
108 | void (*cleanup)(void); |
109 | void (*tlb_flush)(struct agp_memory *); |
110 | unsigned long (*mask_memory)(struct agp_bridge_data *, dma_addr_t, int); |
111 | void (*cache_flush)(void); |
112 | int (*create_gatt_table)(struct agp_bridge_data *); |
113 | int (*free_gatt_table)(struct agp_bridge_data *); |
114 | int (*insert_memory)(struct agp_memory *, off_t, int); |
115 | int (*remove_memory)(struct agp_memory *, off_t, int); |
116 | struct agp_memory *(*alloc_by_type) (size_t, int); |
117 | void (*free_by_type)(struct agp_memory *); |
118 | struct page *(*agp_alloc_page)(struct agp_bridge_data *); |
119 | int (*agp_alloc_pages)(struct agp_bridge_data *, struct agp_memory *, size_t); |
120 | void (*agp_destroy_page)(struct page *, int flags); |
121 | void (*agp_destroy_pages)(struct agp_memory *); |
122 | int (*agp_type_to_mask_type) (struct agp_bridge_data *, int); |
123 | }; |
124 | |
125 | struct agp_bridge_data { |
126 | const struct agp_version *version; |
127 | const struct agp_bridge_driver *driver; |
128 | const struct vm_operations_struct *vm_ops; |
129 | void *previous_size; |
130 | void *current_size; |
131 | void *dev_private_data; |
132 | struct pci_dev *dev; |
133 | u32 __iomem *gatt_table; |
134 | u32 *gatt_table_real; |
135 | unsigned long scratch_page; |
136 | struct page *scratch_page_page; |
137 | dma_addr_t scratch_page_dma; |
138 | unsigned long gart_bus_addr; |
139 | unsigned long gatt_bus_addr; |
140 | u32 mode; |
141 | enum chipset_type type; |
142 | unsigned long *key_list; |
143 | atomic_t current_memory_agp; |
144 | atomic_t agp_in_use; |
145 | int max_memory_agp; /* in number of pages */ |
146 | int aperture_size_idx; |
147 | int capndx; |
148 | int flags; |
149 | char major_version; |
150 | char minor_version; |
151 | struct list_head list; |
152 | u32 apbase_config; |
153 | /* list of agp_memory mapped to the aperture */ |
154 | struct list_head mapped_list; |
155 | spinlock_t mapped_lock; |
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 | |
175 | struct agp_device_ids { |
176 | unsigned short device_id; /* first, to make table easier to read */ |
177 | enum chipset_type chipset; |
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 | #if IS_ENABLED(CONFIG_DRM_LEGACY) |
190 | int agp_frontend_initialize(void); |
191 | void agp_frontend_cleanup(void); |
192 | #else |
193 | static inline int agp_frontend_initialize(void) { return 0; } |
194 | static inline void agp_frontend_cleanup(void) {} |
195 | #endif |
196 | |
197 | /* Generic routines. */ |
198 | void agp_generic_enable(struct agp_bridge_data *bridge, u32 mode); |
199 | int agp_generic_create_gatt_table(struct agp_bridge_data *bridge); |
200 | int agp_generic_free_gatt_table(struct agp_bridge_data *bridge); |
201 | struct agp_memory *agp_create_memory(int scratch_pages); |
202 | int agp_generic_insert_memory(struct agp_memory *mem, off_t pg_start, int type); |
203 | int agp_generic_remove_memory(struct agp_memory *mem, off_t pg_start, int type); |
204 | struct agp_memory *agp_generic_alloc_by_type(size_t page_count, int type); |
205 | void agp_generic_free_by_type(struct agp_memory *curr); |
206 | struct page *agp_generic_alloc_page(struct agp_bridge_data *bridge); |
207 | int agp_generic_alloc_pages(struct agp_bridge_data *agp_bridge, |
208 | struct agp_memory *memory, size_t page_count); |
209 | void agp_generic_destroy_page(struct page *page, int flags); |
210 | void agp_generic_destroy_pages(struct agp_memory *memory); |
211 | void agp_free_key(int key); |
212 | int agp_num_entries(void); |
213 | u32 agp_collect_device_status(struct agp_bridge_data *bridge, u32 mode, u32 command); |
214 | void agp_device_command(u32 command, bool agp_v3); |
215 | int agp_3_5_enable(struct agp_bridge_data *bridge); |
216 | void global_cache_flush(void); |
217 | void get_agp_version(struct agp_bridge_data *bridge); |
218 | unsigned long agp_generic_mask_memory(struct agp_bridge_data *bridge, |
219 | dma_addr_t phys, int type); |
220 | int agp_generic_type_to_mask_type(struct agp_bridge_data *bridge, |
221 | int type); |
222 | struct agp_bridge_data *agp_generic_find_bridge(struct pci_dev *pdev); |
223 | |
224 | /* generic functions for user-populated AGP memory types */ |
225 | struct agp_memory *agp_generic_alloc_user(size_t page_count, int type); |
226 | void agp_alloc_page_array(size_t size, struct agp_memory *mem); |
227 | static inline void agp_free_page_array(struct agp_memory *mem) |
228 | { |
229 | kvfree(addr: mem->pages); |
230 | } |
231 | |
232 | |
233 | /* generic routines for agp>=3 */ |
234 | int agp3_generic_fetch_size(void); |
235 | void agp3_generic_tlbflush(struct agp_memory *mem); |
236 | int agp3_generic_configure(void); |
237 | void agp3_generic_cleanup(void); |
238 | |
239 | /* GATT allocation. Returns/accepts GATT kernel virtual address. */ |
240 | #define alloc_gatt_pages(order) \ |
241 | ((char *)__get_free_pages(GFP_KERNEL, (order))) |
242 | #define free_gatt_pages(table, order) \ |
243 | free_pages((unsigned long)(table), (order)) |
244 | |
245 | /* aperture sizes have been standardised since v3 */ |
246 | #define AGP_GENERIC_SIZES_ENTRIES 11 |
247 | extern const struct aper_size_info_16 agp3_generic_sizes[]; |
248 | |
249 | extern int agp_off; |
250 | extern int agp_try_unsupported_boot; |
251 | |
252 | long compat_agp_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
253 | |
254 | /* Chipset independent registers (from AGP Spec) */ |
255 | #define AGP_APBASE 0x10 |
256 | #define AGP_APERTURE_BAR 0 |
257 | |
258 | #define AGPSTAT 0x4 |
259 | #define AGPCMD 0x8 |
260 | #define AGPNISTAT 0xc |
261 | #define AGPCTRL 0x10 |
262 | #define AGPAPSIZE 0x14 |
263 | #define AGPNEPG 0x16 |
264 | #define AGPGARTLO 0x18 |
265 | #define AGPGARTHI 0x1c |
266 | #define AGPNICMD 0x20 |
267 | |
268 | #define AGP_MAJOR_VERSION_SHIFT (20) |
269 | #define AGP_MINOR_VERSION_SHIFT (16) |
270 | |
271 | #define AGPSTAT_RQ_DEPTH (0xff000000) |
272 | #define AGPSTAT_RQ_DEPTH_SHIFT 24 |
273 | |
274 | #define AGPSTAT_CAL_MASK (1<<12|1<<11|1<<10) |
275 | #define AGPSTAT_ARQSZ (1<<15|1<<14|1<<13) |
276 | #define AGPSTAT_ARQSZ_SHIFT 13 |
277 | |
278 | #define AGPSTAT_SBA (1<<9) |
279 | #define AGPSTAT_AGP_ENABLE (1<<8) |
280 | #define AGPSTAT_FW (1<<4) |
281 | #define AGPSTAT_MODE_3_0 (1<<3) |
282 | |
283 | #define AGPSTAT2_1X (1<<0) |
284 | #define AGPSTAT2_2X (1<<1) |
285 | #define AGPSTAT2_4X (1<<2) |
286 | |
287 | #define AGPSTAT3_RSVD (1<<2) |
288 | #define AGPSTAT3_8X (1<<1) |
289 | #define AGPSTAT3_4X (1) |
290 | |
291 | #define AGPCTRL_APERENB (1<<8) |
292 | #define AGPCTRL_GTLBEN (1<<7) |
293 | |
294 | #define AGP2_RESERVED_MASK 0x00fffcc8 |
295 | #define AGP3_RESERVED_MASK 0x00ff00c4 |
296 | |
297 | #define AGP_ERRATA_FASTWRITES 1<<0 |
298 | #define AGP_ERRATA_SBA 1<<1 |
299 | #define AGP_ERRATA_1X 1<<2 |
300 | |
301 | #endif /* _AGP_BACKEND_PRIV_H */ |
302 | |