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a2721e998e
linux_dsm_epyc7002/drivers/char/agp/agp.h
Dave Airlie a2721e998e AGP fix race condition between unmapping and freeing pages 
With Andi's clflush fixup, we were getting hangs on server exit, flushing the
mappings after freeing each page helped.

This showed up a race condition where the pages after being freed could be
reused before the agp mappings had been flushed.  Flushing after each single
page is a bad thing for future drm work, so make the page destroy a two pass
unmapping all the pages, flushing the mappings, and then destroying the pages.

Signed-off-by: Dave Airlie <airlied@linux.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2007-10-15 10:32:15 +10:00

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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 <asm/agp.h> /* 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", __FUNCTION__ , ## 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;
int cant_use_aperture;
int 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 *, unsigned long, 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 *);
void *(*agp_alloc_page)(struct agp_bridge_data *);
void (*agp_destroy_page)(void *, int flags);
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;
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;
unsigned long scratch_page_real;
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;
};
#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)
/* Intel registers */
#define INTEL_APSIZE 0xb4
#define INTEL_ATTBASE 0xb8
#define INTEL_AGPCTRL 0xb0
#define INTEL_NBXCFG 0x50
#define INTEL_ERRSTS 0x91
/* Intel i830 registers */
#define I830_GMCH_CTRL 0x52
#define I830_GMCH_ENABLED 0x4
#define I830_GMCH_MEM_MASK 0x1
#define I830_GMCH_MEM_64M 0x1
#define I830_GMCH_MEM_128M 0
#define I830_GMCH_GMS_MASK 0x70
#define I830_GMCH_GMS_DISABLED 0x00
#define I830_GMCH_GMS_LOCAL 0x10
#define I830_GMCH_GMS_STOLEN_512 0x20
#define I830_GMCH_GMS_STOLEN_1024 0x30
#define I830_GMCH_GMS_STOLEN_8192 0x40
#define I830_RDRAM_CHANNEL_TYPE 0x03010
#define I830_RDRAM_ND(x) (((x) & 0x20) >> 5)
#define I830_RDRAM_DDT(x) (((x) & 0x18) >> 3)
/* This one is for I830MP w. an external graphic card */
#define INTEL_I830_ERRSTS 0x92
/* Intel 855GM/852GM registers */
#define I855_GMCH_GMS_MASK 0xF0
#define I855_GMCH_GMS_STOLEN_0M 0x0
#define I855_GMCH_GMS_STOLEN_1M (0x1 << 4)
#define I855_GMCH_GMS_STOLEN_4M (0x2 << 4)
#define I855_GMCH_GMS_STOLEN_8M (0x3 << 4)
#define I855_GMCH_GMS_STOLEN_16M (0x4 << 4)
#define I855_GMCH_GMS_STOLEN_32M (0x5 << 4)
#define I85X_CAPID 0x44
#define I85X_VARIANT_MASK 0x7
#define I85X_VARIANT_SHIFT 5
#define I855_GME 0x0
#define I855_GM 0x4
#define I852_GME 0x2
#define I852_GM 0x5
/* Intel i845 registers */
#define INTEL_I845_AGPM 0x51
#define INTEL_I845_ERRSTS 0xc8
/* Intel i860 registers */
#define INTEL_I860_MCHCFG 0x50
#define INTEL_I860_ERRSTS 0xc8
/* Intel i810 registers */
#define I810_GMADDR 0x10
#define I810_MMADDR 0x14
#define I810_PTE_BASE 0x10000
#define I810_PTE_MAIN_UNCACHED 0x00000000
#define I810_PTE_LOCAL 0x00000002
#define I810_PTE_VALID 0x00000001
#define I830_PTE_SYSTEM_CACHED 0x00000006
#define I810_SMRAM_MISCC 0x70
#define I810_GFX_MEM_WIN_SIZE 0x00010000
#define I810_GFX_MEM_WIN_32M 0x00010000
#define I810_GMS 0x000000c0
#define I810_GMS_DISABLE 0x00000000
#define I810_PGETBL_CTL 0x2020
#define I810_PGETBL_ENABLED 0x00000001
#define I965_PGETBL_SIZE_MASK 0x0000000e
#define I965_PGETBL_SIZE_512KB (0 << 1)
#define I965_PGETBL_SIZE_256KB (1 << 1)
#define I965_PGETBL_SIZE_128KB (2 << 1)
#define G33_PGETBL_SIZE_MASK (3 << 8)
#define G33_PGETBL_SIZE_1M (1 << 8)
#define G33_PGETBL_SIZE_2M (2 << 8)
#define I810_DRAM_CTL 0x3000
#define I810_DRAM_ROW_0 0x00000001
#define I810_DRAM_ROW_0_SDRAM 0x00000001
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);
void *agp_generic_alloc_page(struct agp_bridge_data *bridge);
void agp_generic_destroy_page(void *addr, int flags);
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, int 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,
unsigned long addr, 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[];
#define virt_to_gart(x) (phys_to_gart(virt_to_phys(x)))
#define gart_to_virt(x) (phys_to_virt(gart_to_phys(x)))
extern int agp_off;
extern int agp_try_unsupported_boot;
long compat_agp_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
/* Chipset independant registers (from AGP Spec) */
#define AGP_APBASE 0x10
#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 */
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