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/*

 * AGPGART

 * Copyright (C) 2004 Silicon Graphics, Inc.

 * Copyright (C) 2002-2004 Dave Jones

 * Copyright (C) 1999 Jeff Hartmann

 * Copyright (C) 1999 Precision Insight, Inc.

 * Copyright (C) 1999 Xi Graphics, Inc.

 *

 * 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, sublicense,

 * 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 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 NONINFRINGEMENT.  IN NO EVENT SHALL

 * JEFF HARTMANN, OR ANY OTHER CONTRIBUTORS 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.

 *

 */

#ifndef _AGP_BACKEND_PRIV_H

#define _AGP_BACKEND_PRIV_H 1

#include 	/* for flush_agp_cache() */

#define PFX "agpgart: "

//#define AGP_DEBUG 1

#ifdef AGP_DEBUG

#define DBG(x,y...) printk (KERN_DEBUG PFX "%s: " x "\n", __func__ , ## y)

#else

#define DBG(x,y...) do { } while (0)

#endif

extern struct agp_bridge_data *agp_bridge;

enum aper_size_type {

	U8_APER_SIZE,

	U16_APER_SIZE,

	U32_APER_SIZE,

	LVL2_APER_SIZE,

	FIXED_APER_SIZE

};

struct gatt_mask {

	unsigned long mask;

	u32 type;

	/* totally device specific, for integrated chipsets that

	 * might have different types of memory masks.  For other

	 * devices this will probably be ignored */

};

#define AGP_PAGE_DESTROY_UNMAP 1

#define AGP_PAGE_DESTROY_FREE 2

struct aper_size_info_8 {

	int size;

	int num_entries;

	int page_order;

	u8 size_value;

};

struct aper_size_info_16 {

	int size;

	int num_entries;

	int page_order;

	u16 size_value;

};

struct aper_size_info_32 {

	int size;

	int num_entries;

	int page_order;

	u32 size_value;

};

struct aper_size_info_lvl2 {

	int size;

	int num_entries;

	u32 size_value;

};

struct aper_size_info_fixed {

	int size;

	int num_entries;

	int page_order;

};

struct agp_bridge_driver {

	struct module *owner;

	const void *aperture_sizes;

	int num_aperture_sizes;

	enum aper_size_type size_type;

	bool cant_use_aperture;

	bool needs_scratch_page;

	const struct gatt_mask *masks;

	int (*fetch_size)(void);

	int (*configure)(void);

	void (*agp_enable)(struct agp_bridge_data *, u32);

	void (*cleanup)(void);

	void (*tlb_flush)(struct agp_memory *);

	unsigned long (*mask_memory)(struct agp_bridge_data *, dma_addr_t, int);

	void (*cache_flush)(void);

	int (*create_gatt_table)(struct agp_bridge_data *);

	int (*free_gatt_table)(struct agp_bridge_data *);

	int (*insert_memory)(struct agp_memory *, off_t, int);

	int (*remove_memory)(struct agp_memory *, off_t, int);

	struct agp_memory *(*alloc_by_type) (size_t, int);

	void (*free_by_type)(struct agp_memory *);

	struct page *(*agp_alloc_page)(struct agp_bridge_data *);

	int (*agp_alloc_pages)(struct agp_bridge_data *, struct agp_memory *, size_t);

	void (*agp_destroy_page)(struct page *, int flags);

	void (*agp_destroy_pages)(struct agp_memory *);

	int (*agp_type_to_mask_type) (struct agp_bridge_data *, int);

};

struct agp_bridge_data {

	const struct agp_version *version;

	const struct agp_bridge_driver *driver;

	const struct vm_operations_struct *vm_ops;

	void *previous_size;

	void *current_size;

	void *dev_private_data;

	struct pci_dev *dev;

	u32 __iomem *gatt_table;

	u32 *gatt_table_real;

	unsigned long scratch_page;

	struct page *scratch_page_page;

	dma_addr_t scratch_page_dma;

	unsigned long gart_bus_addr;

	unsigned long gatt_bus_addr;

	u32 mode;

	enum chipset_type type;

	unsigned long *key_list;

	atomic_t current_memory_agp;

	atomic_t agp_in_use;

	int max_memory_agp;	/* in number of pages */

	int aperture_size_idx;

	int capndx;

	int flags;

	char major_version;

	char minor_version;

	struct list_head list;

	u32 apbase_config;

	/* list of agp_memory mapped to the aperture */

	struct list_head mapped_list;

	spinlock_t mapped_lock;

};

#define KB(x)	((x) * 1024)

#define MB(x)	(KB (KB (x)))

#define GB(x)	(MB (KB (x)))

#define A_SIZE_8(x)	((struct aper_size_info_8 *) x)

#define A_SIZE_16(x)	((struct aper_size_info_16 *) x)

#define A_SIZE_32(x)	((struct aper_size_info_32 *) x)

#define A_SIZE_LVL2(x)	((struct aper_size_info_lvl2 *) x)

#define A_SIZE_FIX(x)	((struct aper_size_info_fixed *) x)

#define A_IDX8(bridge)	(A_SIZE_8((bridge)->driver->aperture_sizes) + i)

#define A_IDX16(bridge)	(A_SIZE_16((bridge)->driver->aperture_sizes) + i)

#define A_IDX32(bridge)	(A_SIZE_32((bridge)->driver->aperture_sizes) + i)

#define MAXKEY		(4096 * 32)

#define PGE_EMPTY(b, p)	(!(p) || (p) == (unsigned long) (b)->scratch_page)

struct agp_device_ids {

	unsigned short device_id; /* first, to make table easier to read */

	enum chipset_type chipset;

	const char *chipset_name;

	int (*chipset_setup) (struct pci_dev *pdev);	/* used to override generic */

};

/* Driver registration */

struct agp_bridge_data *agp_alloc_bridge(void);

void agp_put_bridge(struct agp_bridge_data *bridge);

int agp_add_bridge(struct agp_bridge_data *bridge);

void agp_remove_bridge(struct agp_bridge_data *bridge);

/* Frontend routines. */

int agp_frontend_initialize(void);

void agp_frontend_cleanup(void);

/* Generic routines. */

void agp_generic_enable(struct agp_bridge_data *bridge, u32 mode);

int agp_generic_create_gatt_table(struct agp_bridge_data *bridge);

int agp_generic_free_gatt_table(struct agp_bridge_data *bridge);

struct agp_memory *agp_create_memory(int scratch_pages);

int agp_generic_insert_memory(struct agp_memory *mem, off_t pg_start, int type);

int agp_generic_remove_memory(struct agp_memory *mem, off_t pg_start, int type);

struct agp_memory *agp_generic_alloc_by_type(size_t page_count, int type);

void agp_generic_free_by_type(struct agp_memory *curr);

struct page *agp_generic_alloc_page(struct agp_bridge_data *bridge);

int agp_generic_alloc_pages(struct agp_bridge_data *agp_bridge,

			    struct agp_memory *memory, size_t page_count);

void agp_generic_destroy_page(struct page *page, int flags);

void agp_generic_destroy_pages(struct agp_memory *memory);

void agp_free_key(int key);

int agp_num_entries(void);

u32 agp_collect_device_status(struct agp_bridge_data *bridge, u32 mode, u32 command);

void agp_device_command(u32 command, bool agp_v3);

int agp_3_5_enable(struct agp_bridge_data *bridge);

void global_cache_flush(void);

void get_agp_version(struct agp_bridge_data *bridge);

unsigned long agp_generic_mask_memory(struct agp_bridge_data *bridge,

				      dma_addr_t phys, int type);

int agp_generic_type_to_mask_type(struct agp_bridge_data *bridge,

				  int type);

struct agp_bridge_data *agp_generic_find_bridge(struct pci_dev *pdev);

/* generic functions for user-populated AGP memory types */

struct agp_memory *agp_generic_alloc_user(size_t page_count, int type);

void agp_alloc_page_array(size_t size, struct agp_memory *mem);

void agp_free_page_array(struct agp_memory *mem);

/* generic routines for agp>=3 */

int agp3_generic_fetch_size(void);

void agp3_generic_tlbflush(struct agp_memory *mem);

int agp3_generic_configure(void);

void agp3_generic_cleanup(void);

/* aperture sizes have been standardised since v3 */

#define AGP_GENERIC_SIZES_ENTRIES 11

extern const struct aper_size_info_16 agp3_generic_sizes[];

extern int agp_off;

extern int agp_try_unsupported_boot;

long compat_agp_ioctl(struct file *file, unsigned int cmd, unsigned long arg);

/* Chipset independent registers (from AGP Spec) */

#define AGP_APBASE	0x10

#define AGP_APERTURE_BAR	0

#define AGPSTAT		0x4

#define AGPCMD		0x8

#define AGPNISTAT	0xc

#define AGPCTRL		0x10

#define AGPAPSIZE	0x14

#define AGPNEPG		0x16

#define AGPGARTLO	0x18

#define AGPGARTHI	0x1c

#define AGPNICMD	0x20

#define AGP_MAJOR_VERSION_SHIFT	(20)

#define AGP_MINOR_VERSION_SHIFT	(16)

#define AGPSTAT_RQ_DEPTH	(0xff000000)

#define AGPSTAT_RQ_DEPTH_SHIFT	24

#define AGPSTAT_CAL_MASK	(1<<12|1<<11|1<<10)

#define AGPSTAT_ARQSZ		(1<<15|1<<14|1<<13)

#define AGPSTAT_ARQSZ_SHIFT	13

#define AGPSTAT_SBA		(1<<9)

#define AGPSTAT_AGP_ENABLE	(1<<8)

#define AGPSTAT_FW		(1<<4)

#define AGPSTAT_MODE_3_0	(1<<3)

#define AGPSTAT2_1X		(1<<0)

#define AGPSTAT2_2X		(1<<1)

#define AGPSTAT2_4X		(1<<2)

#define AGPSTAT3_RSVD		(1<<2)

#define AGPSTAT3_8X		(1<<1)

#define AGPSTAT3_4X		(1)

#define AGPCTRL_APERENB		(1<<8)

#define AGPCTRL_GTLBEN		(1<<7)

#define AGP2_RESERVED_MASK 0x00fffcc8

#define AGP3_RESERVED_MASK 0x00ff00c4

#define AGP_ERRATA_FASTWRITES 1<<0

#define AGP_ERRATA_SBA	 1<<1

#define AGP_ERRATA_1X 1<<2

#endif	/* _AGP_BACKEND_PRIV_H */