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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.  
  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. 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);
  194. int agp_generic_create_gatt_table(struct agp_bridge_data *bridge);
  195. int agp_generic_free_gatt_table(struct agp_bridge_data *bridge);
  196. struct agp_memory *agp_create_memory(int scratch_pages);
  197. int agp_generic_insert_memory(struct agp_memory *mem, off_t pg_start, int type);
  198. int agp_generic_remove_memory(struct agp_memory *mem, off_t pg_start, int type);
  199. struct agp_memory *agp_generic_alloc_by_type(size_t page_count, int type);
  200. void agp_generic_free_by_type(struct agp_memory *curr);
  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);
  205. void agp_generic_destroy_pages(struct agp_memory *memory);
  206. void agp_free_key(int key);
  207. int agp_num_entries(void);
  208. u32 agp_collect_device_status(struct agp_bridge_data *bridge, u32 mode, u32 command);
  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);
  215. int agp_generic_type_to_mask_type(struct agp_bridge_data *bridge,
  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. #define AGP_APERTURE_BAR        0
  243.  
  244. #define AGPSTAT         0x4
  245. #define AGPCMD          0x8
  246. #define AGPNISTAT       0xc
  247. #define AGPCTRL         0x10
  248. #define AGPAPSIZE       0x14
  249. #define AGPNEPG         0x16
  250. #define AGPGARTLO       0x18
  251. #define AGPGARTHI       0x1c
  252. #define AGPNICMD        0x20
  253.  
  254. #define AGP_MAJOR_VERSION_SHIFT (20)
  255. #define AGP_MINOR_VERSION_SHIFT (16)
  256.  
  257. #define AGPSTAT_RQ_DEPTH        (0xff000000)
  258. #define AGPSTAT_RQ_DEPTH_SHIFT  24
  259.  
  260. #define AGPSTAT_CAL_MASK        (1<<12|1<<11|1<<10)
  261. #define AGPSTAT_ARQSZ           (1<<15|1<<14|1<<13)
  262. #define AGPSTAT_ARQSZ_SHIFT     13
  263.  
  264. #define AGPSTAT_SBA             (1<<9)
  265. #define AGPSTAT_AGP_ENABLE      (1<<8)
  266. #define AGPSTAT_FW              (1<<4)
  267. #define AGPSTAT_MODE_3_0        (1<<3)
  268.  
  269. #define AGPSTAT2_1X             (1<<0)
  270. #define AGPSTAT2_2X             (1<<1)
  271. #define AGPSTAT2_4X             (1<<2)
  272.  
  273. #define AGPSTAT3_RSVD           (1<<2)
  274. #define AGPSTAT3_8X             (1<<1)
  275. #define AGPSTAT3_4X             (1)
  276.  
  277. #define AGPCTRL_APERENB         (1<<8)
  278. #define AGPCTRL_GTLBEN          (1<<7)
  279.  
  280. #define AGP2_RESERVED_MASK 0x00fffcc8
  281. #define AGP3_RESERVED_MASK 0x00ff00c4
  282.  
  283. #define AGP_ERRATA_FASTWRITES 1<<0
  284. #define AGP_ERRATA_SBA   1<<1
  285. #define AGP_ERRATA_1X 1<<2
  286.  
  287. #endif  /* _AGP_BACKEND_PRIV_H */
  288.