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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.  
  35. enum chipset_type {
  36.        NOT_SUPPORTED,
  37.        SUPPORTED,
  38. };
  39.  
  40. struct agp_memory;
  41.  
  42. #define PFX "agpgart: "
  43.  
  44. //#define AGP_DEBUG 1
  45. #ifdef AGP_DEBUG
  46. #define DBG(x,y...) printk (KERN_DEBUG PFX "%s: " x "\n", __func__ , ## y)
  47. #else
  48. #define DBG(x,y...) do { } while (0)
  49. #endif
  50.  
  51. extern struct agp_bridge_data *agp_bridge;
  52.  
  53. enum aper_size_type {
  54.         U8_APER_SIZE,
  55.         U16_APER_SIZE,
  56.         U32_APER_SIZE,
  57.         LVL2_APER_SIZE,
  58.         FIXED_APER_SIZE
  59. };
  60.  
  61. struct gatt_mask {
  62.         unsigned long mask;
  63.         u32 type;
  64.         /* totally device specific, for integrated chipsets that
  65.          * might have different types of memory masks.  For other
  66.          * devices this will probably be ignored */
  67. };
  68.  
  69. #define AGP_PAGE_DESTROY_UNMAP 1
  70. #define AGP_PAGE_DESTROY_FREE 2
  71.  
  72. struct aper_size_info_8 {
  73.         int size;
  74.         int num_entries;
  75.         int page_order;
  76.         u8 size_value;
  77. };
  78.  
  79. struct aper_size_info_16 {
  80.         int size;
  81.         int num_entries;
  82.         int page_order;
  83.         u16 size_value;
  84. };
  85.  
  86. struct aper_size_info_32 {
  87.         int size;
  88.         int num_entries;
  89.         int page_order;
  90.         u32 size_value;
  91. };
  92.  
  93. struct aper_size_info_lvl2 {
  94.         int size;
  95.         int num_entries;
  96.         u32 size_value;
  97. };
  98.  
  99. struct aper_size_info_fixed {
  100.         int size;
  101.         int num_entries;
  102.         int page_order;
  103. };
  104.  
  105. struct agp_bridge_driver {
  106.         struct module *owner;
  107.         const void *aperture_sizes;
  108.         int num_aperture_sizes;
  109.         enum aper_size_type size_type;
  110.         bool cant_use_aperture;
  111.         bool needs_scratch_page;
  112.         const struct gatt_mask *masks;
  113.         int (*fetch_size)(void);
  114.         int (*configure)(void);
  115.         void (*agp_enable)(struct agp_bridge_data *, u32);
  116.         void (*cleanup)(void);
  117.         void (*tlb_flush)(struct agp_memory *);
  118.         unsigned long (*mask_memory)(struct agp_bridge_data *, dma_addr_t, int);
  119.         void (*cache_flush)(void);
  120.         int (*create_gatt_table)(struct agp_bridge_data *);
  121.         int (*free_gatt_table)(struct agp_bridge_data *);
  122.         int (*insert_memory)(struct agp_memory *, off_t, int);
  123.         int (*remove_memory)(struct agp_memory *, off_t, int);
  124.         struct agp_memory *(*alloc_by_type) (size_t, int);
  125.         void (*free_by_type)(struct agp_memory *);
  126.         struct page *(*agp_alloc_page)(struct agp_bridge_data *);
  127.         int (*agp_alloc_pages)(struct agp_bridge_data *, struct agp_memory *, size_t);
  128.         void (*agp_destroy_page)(struct page *, int flags);
  129.         void (*agp_destroy_pages)(struct agp_memory *);
  130.         int (*agp_type_to_mask_type) (struct agp_bridge_data *, int);
  131. };
  132.  
  133. struct agp_bridge_data {
  134.         const struct agp_version *version;
  135.         const struct agp_bridge_driver *driver;
  136.         const struct vm_operations_struct *vm_ops;
  137.         void *previous_size;
  138.         void *current_size;
  139.         void *dev_private_data;
  140.         struct pci_dev *dev;
  141.         u32 __iomem *gatt_table;
  142.         u32 *gatt_table_real;
  143.         unsigned long scratch_page;
  144.         struct page *scratch_page_page;
  145.         dma_addr_t scratch_page_dma;
  146.         unsigned long gart_bus_addr;
  147.         unsigned long gatt_bus_addr;
  148.         u32 mode;
  149.         enum chipset_type type;
  150.         unsigned long *key_list;
  151.         atomic_t current_memory_agp;
  152.         atomic_t agp_in_use;
  153.         int max_memory_agp;     /* in number of pages */
  154.         int aperture_size_idx;
  155.         int capndx;
  156.         int flags;
  157.         char major_version;
  158.         char minor_version;
  159.         struct list_head list;
  160.         u32 apbase_config;
  161.         /* list of agp_memory mapped to the aperture */
  162.         struct list_head mapped_list;
  163.         spinlock_t mapped_lock;
  164. };
  165.  
  166. #define KB(x)   ((x) * 1024)
  167. #define MB(x)   (KB (KB (x)))
  168. #define GB(x)   (MB (KB (x)))
  169.  
  170. #define A_SIZE_8(x)     ((struct aper_size_info_8 *) x)
  171. #define A_SIZE_16(x)    ((struct aper_size_info_16 *) x)
  172. #define A_SIZE_32(x)    ((struct aper_size_info_32 *) x)
  173. #define A_SIZE_LVL2(x)  ((struct aper_size_info_lvl2 *) x)
  174. #define A_SIZE_FIX(x)   ((struct aper_size_info_fixed *) x)
  175. #define A_IDX8(bridge)  (A_SIZE_8((bridge)->driver->aperture_sizes) + i)
  176. #define A_IDX16(bridge) (A_SIZE_16((bridge)->driver->aperture_sizes) + i)
  177. #define A_IDX32(bridge) (A_SIZE_32((bridge)->driver->aperture_sizes) + i)
  178. #define MAXKEY          (4096 * 32)
  179.  
  180. #define PGE_EMPTY(b, p) (!(p) || (p) == (unsigned long) (b)->scratch_page)
  181.  
  182.  
  183. struct agp_device_ids {
  184.         unsigned short device_id; /* first, to make table easier to read */
  185.         enum chipset_type chipset;
  186.         const char *chipset_name;
  187.         int (*chipset_setup) (struct pci_dev *pdev);    /* used to override generic */
  188. };
  189.  
  190. /* Driver registration */
  191. struct agp_bridge_data *agp_alloc_bridge(void);
  192. void agp_put_bridge(struct agp_bridge_data *bridge);
  193. int agp_add_bridge(struct agp_bridge_data *bridge);
  194. void agp_remove_bridge(struct agp_bridge_data *bridge);
  195.  
  196. /* Frontend routines. */
  197. int agp_frontend_initialize(void);
  198. void agp_frontend_cleanup(void);
  199.  
  200. /* Generic routines. */
  201. void agp_generic_enable(struct agp_bridge_data *bridge, u32 mode);
  202. int agp_generic_create_gatt_table(struct agp_bridge_data *bridge);
  203. int agp_generic_free_gatt_table(struct agp_bridge_data *bridge);
  204. struct agp_memory *agp_create_memory(int scratch_pages);
  205. int agp_generic_insert_memory(struct agp_memory *mem, off_t pg_start, int type);
  206. int agp_generic_remove_memory(struct agp_memory *mem, off_t pg_start, int type);
  207. struct agp_memory *agp_generic_alloc_by_type(size_t page_count, int type);
  208. void agp_generic_free_by_type(struct agp_memory *curr);
  209. struct page *agp_generic_alloc_page(struct agp_bridge_data *bridge);
  210. int agp_generic_alloc_pages(struct agp_bridge_data *agp_bridge,
  211.                             struct agp_memory *memory, size_t page_count);
  212. void agp_generic_destroy_page(struct page *page, int flags);
  213. void agp_generic_destroy_pages(struct agp_memory *memory);
  214. void agp_free_key(int key);
  215. int agp_num_entries(void);
  216. u32 agp_collect_device_status(struct agp_bridge_data *bridge, u32 mode, u32 command);
  217. void agp_device_command(u32 command, bool agp_v3);
  218. int agp_3_5_enable(struct agp_bridge_data *bridge);
  219. void global_cache_flush(void);
  220. void get_agp_version(struct agp_bridge_data *bridge);
  221. unsigned long agp_generic_mask_memory(struct agp_bridge_data *bridge,
  222.                                       dma_addr_t phys, int type);
  223. int agp_generic_type_to_mask_type(struct agp_bridge_data *bridge,
  224.                                   int type);
  225. struct agp_bridge_data *agp_generic_find_bridge(struct pci_dev *pdev);
  226.  
  227. /* generic functions for user-populated AGP memory types */
  228. struct agp_memory *agp_generic_alloc_user(size_t page_count, int type);
  229. void agp_alloc_page_array(size_t size, struct agp_memory *mem);
  230. void agp_free_page_array(struct agp_memory *mem);
  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. /* aperture sizes have been standardised since v3 */
  240. #define AGP_GENERIC_SIZES_ENTRIES 11
  241. extern const struct aper_size_info_16 agp3_generic_sizes[];
  242.  
  243. extern int agp_off;
  244. extern int agp_try_unsupported_boot;
  245.  
  246. long compat_agp_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
  247.  
  248. /* Chipset independent registers (from AGP Spec) */
  249. #define AGP_APBASE      0x10
  250.  
  251. #define AGPSTAT         0x4
  252. #define AGPCMD          0x8
  253. #define AGPNISTAT       0xc
  254. #define AGPCTRL         0x10
  255. #define AGPAPSIZE       0x14
  256. #define AGPNEPG         0x16
  257. #define AGPGARTLO       0x18
  258. #define AGPGARTHI       0x1c
  259. #define AGPNICMD        0x20
  260.  
  261. #define AGP_MAJOR_VERSION_SHIFT (20)
  262. #define AGP_MINOR_VERSION_SHIFT (16)
  263.  
  264. #define AGPSTAT_RQ_DEPTH        (0xff000000)
  265. #define AGPSTAT_RQ_DEPTH_SHIFT  24
  266.  
  267. #define AGPSTAT_CAL_MASK        (1<<12|1<<11|1<<10)
  268. #define AGPSTAT_ARQSZ           (1<<15|1<<14|1<<13)
  269. #define AGPSTAT_ARQSZ_SHIFT     13
  270.  
  271. #define AGPSTAT_SBA             (1<<9)
  272. #define AGPSTAT_AGP_ENABLE      (1<<8)
  273. #define AGPSTAT_FW              (1<<4)
  274. #define AGPSTAT_MODE_3_0        (1<<3)
  275.  
  276. #define AGPSTAT2_1X             (1<<0)
  277. #define AGPSTAT2_2X             (1<<1)
  278. #define AGPSTAT2_4X             (1<<2)
  279.  
  280. #define AGPSTAT3_RSVD           (1<<2)
  281. #define AGPSTAT3_8X             (1<<1)
  282. #define AGPSTAT3_4X             (1)
  283.  
  284. #define AGPCTRL_APERENB         (1<<8)
  285. #define AGPCTRL_GTLBEN          (1<<7)
  286.  
  287. #define AGP2_RESERVED_MASK 0x00fffcc8
  288. #define AGP3_RESERVED_MASK 0x00ff00c4
  289.  
  290. #define AGP_ERRATA_FASTWRITES 1<<0
  291. #define AGP_ERRATA_SBA   1<<1
  292. #define AGP_ERRATA_1X 1<<2
  293.  
  294. #endif  /* _AGP_BACKEND_PRIV_H */
  295.