Quelle  intel-agp.c   Sprache: C

/*
 * Intel AGPGART routines.
 */

#include <linux/module.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/pagemap.h>
#include <linux/agp_backend.h>
#include <asm/smp.h>
#include "agp.h"
#include "intel-agp.h"
#include <drm/intel/intel-gtt.h>

static int intel_fetch_size(void)
{
 int i;
 u16 temp;
 struct aper_size_info_16 *values;

 pci_read_config_word(agp_bridge->dev, INTEL_APSIZE, &temp);
 values = A_SIZE_16(agp_bridge->driver->aperture_sizes);

 for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
  if (temp == values[i].size_value) {
   agp_bridge->previous_size = agp_bridge->current_size = (void *) (values + i);
   agp_bridge->aperture_size_idx = i;
   return values[i].size;
  }
 }

 return 0;
}

static int __intel_8xx_fetch_size(u8 temp)
{
 int i;
 struct aper_size_info_8 *values;

 values = A_SIZE_8(agp_bridge->driver->aperture_sizes);

 for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
  if (temp == values[i].size_value) {
   agp_bridge->previous_size =
    agp_bridge->current_size = (void *) (values + i);
   agp_bridge->aperture_size_idx = i;
   return values[i].size;
  }
 }
 return 0;
}

static int intel_8xx_fetch_size(void)
{
 u8 temp;

 pci_read_config_byte(agp_bridge->dev, INTEL_APSIZE, &temp);
 return __intel_8xx_fetch_size(temp);
}

static int intel_815_fetch_size(void)
{
 u8 temp;

 /* Intel 815 chipsets have a _weird_ APSIZE register with only
 * one non-reserved bit, so mask the others out ... */
 pci_read_config_byte(agp_bridge->dev, INTEL_APSIZE, &temp);
 temp &= (1 << 3);

 return __intel_8xx_fetch_size(temp);
}

static void intel_tlbflush(struct agp_memory *mem)
{
 pci_write_config_dword(agp_bridge->dev, INTEL_AGPCTRL, 0x2200);
 pci_write_config_dword(agp_bridge->dev, INTEL_AGPCTRL, 0x2280);
}


static void intel_8xx_tlbflush(struct agp_memory *mem)
{
 u32 temp;
 pci_read_config_dword(agp_bridge->dev, INTEL_AGPCTRL, &temp);
 pci_write_config_dword(agp_bridge->dev, INTEL_AGPCTRL, temp & ~(1 << 7));
 pci_read_config_dword(agp_bridge->dev, INTEL_AGPCTRL, &temp);
 pci_write_config_dword(agp_bridge->dev, INTEL_AGPCTRL, temp | (1 << 7));
}


static void intel_cleanup(void)
{
 u16 temp;
 struct aper_size_info_16 *previous_size;

 previous_size = A_SIZE_16(agp_bridge->previous_size);
 pci_read_config_word(agp_bridge->dev, INTEL_NBXCFG, &temp);
 pci_write_config_word(agp_bridge->dev, INTEL_NBXCFG, temp & ~(1 << 9));
 pci_write_config_word(agp_bridge->dev, INTEL_APSIZE, previous_size->size_value);
}


static void intel_8xx_cleanup(void)
{
 u16 temp;
 struct aper_size_info_8 *previous_size;

 previous_size = A_SIZE_8(agp_bridge->previous_size);
 pci_read_config_word(agp_bridge->dev, INTEL_NBXCFG, &temp);
 pci_write_config_word(agp_bridge->dev, INTEL_NBXCFG, temp & ~(1 << 9));
 pci_write_config_byte(agp_bridge->dev, INTEL_APSIZE, previous_size->size_value);
}


static int intel_configure(void)
{
 u16 temp2;
 struct aper_size_info_16 *current_size;

 current_size = A_SIZE_16(agp_bridge->current_size);

 /* aperture size */
 pci_write_config_word(agp_bridge->dev, INTEL_APSIZE, current_size->size_value);

 /* address to map to */
 agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev,
          AGP_APERTURE_BAR);

 /* attbase - aperture base */
 pci_write_config_dword(agp_bridge->dev, INTEL_ATTBASE, agp_bridge->gatt_bus_addr);

 /* agpctrl */
 pci_write_config_dword(agp_bridge->dev, INTEL_AGPCTRL, 0x2280);

 /* paccfg/nbxcfg */
 pci_read_config_word(agp_bridge->dev, INTEL_NBXCFG, &temp2);
 pci_write_config_word(agp_bridge->dev, INTEL_NBXCFG,
   (temp2 & ~(1 << 10)) | (1 << 9));
 /* clear any possible error conditions */
 pci_write_config_byte(agp_bridge->dev, INTEL_ERRSTS + 1, 7);
 return 0;
}

static int intel_815_configure(void)
{
 u32 addr;
 u8 temp2;
 struct aper_size_info_8 *current_size;

 /* attbase - aperture base */
 /* the Intel 815 chipset spec. says that bits 29-31 in the
* ATTBASE register are reserved -> try not to write them */
 if (agp_bridge->gatt_bus_addr & INTEL_815_ATTBASE_MASK) {
  dev_emerg(&agp_bridge->dev->dev, "gatt bus addr too high");
  return -EINVAL;
 }

 current_size = A_SIZE_8(agp_bridge->current_size);

 /* aperture size */
 pci_write_config_byte(agp_bridge->dev, INTEL_APSIZE,
   current_size->size_value);

 /* address to map to */
 agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev,
          AGP_APERTURE_BAR);

 pci_read_config_dword(agp_bridge->dev, INTEL_ATTBASE, &addr);
 addr &= INTEL_815_ATTBASE_MASK;
 addr |= agp_bridge->gatt_bus_addr;
 pci_write_config_dword(agp_bridge->dev, INTEL_ATTBASE, addr);

 /* agpctrl */
 pci_write_config_dword(agp_bridge->dev, INTEL_AGPCTRL, 0x0000);

 /* apcont */
 pci_read_config_byte(agp_bridge->dev, INTEL_815_APCONT, &temp2);
 pci_write_config_byte(agp_bridge->dev, INTEL_815_APCONT, temp2 | (1 << 1));

 /* clear any possible error conditions */
 /* Oddness : this chipset seems to have no ERRSTS register ! */
 return 0;
}

static void intel_820_tlbflush(struct agp_memory *mem)
{
 return;
}

static void intel_820_cleanup(void)
{
 u8 temp;
 struct aper_size_info_8 *previous_size;

 previous_size = A_SIZE_8(agp_bridge->previous_size);
 pci_read_config_byte(agp_bridge->dev, INTEL_I820_RDCR, &temp);
 pci_write_config_byte(agp_bridge->dev, INTEL_I820_RDCR,
   temp & ~(1 << 1));
 pci_write_config_byte(agp_bridge->dev, INTEL_APSIZE,
   previous_size->size_value);
}


static int intel_820_configure(void)
{
 u8 temp2;
 struct aper_size_info_8 *current_size;

 current_size = A_SIZE_8(agp_bridge->current_size);

 /* aperture size */
 pci_write_config_byte(agp_bridge->dev, INTEL_APSIZE, current_size->size_value);

 /* address to map to */
 agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev,
          AGP_APERTURE_BAR);

 /* attbase - aperture base */
 pci_write_config_dword(agp_bridge->dev, INTEL_ATTBASE, agp_bridge->gatt_bus_addr);

 /* agpctrl */
 pci_write_config_dword(agp_bridge->dev, INTEL_AGPCTRL, 0x0000);

 /* global enable aperture access */
 /* This flag is not accessed through MCHCFG register as in */
 /* i850 chipset. */
 pci_read_config_byte(agp_bridge->dev, INTEL_I820_RDCR, &temp2);
 pci_write_config_byte(agp_bridge->dev, INTEL_I820_RDCR, temp2 | (1 << 1));
 /* clear any possible AGP-related error conditions */
 pci_write_config_word(agp_bridge->dev, INTEL_I820_ERRSTS, 0x001c);
 return 0;
}

static int intel_840_configure(void)
{
 u16 temp2;
 struct aper_size_info_8 *current_size;

 current_size = A_SIZE_8(agp_bridge->current_size);

 /* aperture size */
 pci_write_config_byte(agp_bridge->dev, INTEL_APSIZE, current_size->size_value);

 /* address to map to */
 agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev,
          AGP_APERTURE_BAR);

 /* attbase - aperture base */
 pci_write_config_dword(agp_bridge->dev, INTEL_ATTBASE, agp_bridge->gatt_bus_addr);

 /* agpctrl */
 pci_write_config_dword(agp_bridge->dev, INTEL_AGPCTRL, 0x0000);

 /* mcgcfg */
 pci_read_config_word(agp_bridge->dev, INTEL_I840_MCHCFG, &temp2);
 pci_write_config_word(agp_bridge->dev, INTEL_I840_MCHCFG, temp2 | (1 << 9));
 /* clear any possible error conditions */
 pci_write_config_word(agp_bridge->dev, INTEL_I840_ERRSTS, 0xc000);
 return 0;
}

static int intel_845_configure(void)
{
 u8 temp2;
 struct aper_size_info_8 *current_size;

 current_size = A_SIZE_8(agp_bridge->current_size);

 /* aperture size */
 pci_write_config_byte(agp_bridge->dev, INTEL_APSIZE, current_size->size_value);

 if (agp_bridge->apbase_config != 0) {
  pci_write_config_dword(agp_bridge->dev, AGP_APBASE,
           agp_bridge->apbase_config);
 } else {
  /* address to map to */
  agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev,
           AGP_APERTURE_BAR);
  agp_bridge->apbase_config = agp_bridge->gart_bus_addr;
 }

 /* attbase - aperture base */
 pci_write_config_dword(agp_bridge->dev, INTEL_ATTBASE, agp_bridge->gatt_bus_addr);

 /* agpctrl */
 pci_write_config_dword(agp_bridge->dev, INTEL_AGPCTRL, 0x0000);

 /* agpm */
 pci_read_config_byte(agp_bridge->dev, INTEL_I845_AGPM, &temp2);
 pci_write_config_byte(agp_bridge->dev, INTEL_I845_AGPM, temp2 | (1 << 1));
 /* clear any possible error conditions */
 pci_write_config_word(agp_bridge->dev, INTEL_I845_ERRSTS, 0x001c);
 return 0;
}

static int intel_850_configure(void)
{
 u16 temp2;
 struct aper_size_info_8 *current_size;

 current_size = A_SIZE_8(agp_bridge->current_size);

 /* aperture size */
 pci_write_config_byte(agp_bridge->dev, INTEL_APSIZE, current_size->size_value);

 /* address to map to */
 agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev,
          AGP_APERTURE_BAR);

 /* attbase - aperture base */
 pci_write_config_dword(agp_bridge->dev, INTEL_ATTBASE, agp_bridge->gatt_bus_addr);

 /* agpctrl */
 pci_write_config_dword(agp_bridge->dev, INTEL_AGPCTRL, 0x0000);

 /* mcgcfg */
 pci_read_config_word(agp_bridge->dev, INTEL_I850_MCHCFG, &temp2);
 pci_write_config_word(agp_bridge->dev, INTEL_I850_MCHCFG, temp2 | (1 << 9));
 /* clear any possible AGP-related error conditions */
 pci_write_config_word(agp_bridge->dev, INTEL_I850_ERRSTS, 0x001c);
 return 0;
}

static int intel_860_configure(void)
{
 u16 temp2;
 struct aper_size_info_8 *current_size;

 current_size = A_SIZE_8(agp_bridge->current_size);

 /* aperture size */
 pci_write_config_byte(agp_bridge->dev, INTEL_APSIZE, current_size->size_value);

 /* address to map to */
 agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev,
          AGP_APERTURE_BAR);

 /* attbase - aperture base */
 pci_write_config_dword(agp_bridge->dev, INTEL_ATTBASE, agp_bridge->gatt_bus_addr);

 /* agpctrl */
 pci_write_config_dword(agp_bridge->dev, INTEL_AGPCTRL, 0x0000);

 /* mcgcfg */
 pci_read_config_word(agp_bridge->dev, INTEL_I860_MCHCFG, &temp2);
 pci_write_config_word(agp_bridge->dev, INTEL_I860_MCHCFG, temp2 | (1 << 9));
 /* clear any possible AGP-related error conditions */
 pci_write_config_word(agp_bridge->dev, INTEL_I860_ERRSTS, 0xf700);
 return 0;
}

static int intel_830mp_configure(void)
{
 u16 temp2;
 struct aper_size_info_8 *current_size;

 current_size = A_SIZE_8(agp_bridge->current_size);

 /* aperture size */
 pci_write_config_byte(agp_bridge->dev, INTEL_APSIZE, current_size->size_value);

 /* address to map to */
 agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev,
          AGP_APERTURE_BAR);

 /* attbase - aperture base */
 pci_write_config_dword(agp_bridge->dev, INTEL_ATTBASE, agp_bridge->gatt_bus_addr);

 /* agpctrl */
 pci_write_config_dword(agp_bridge->dev, INTEL_AGPCTRL, 0x0000);

 /* gmch */
 pci_read_config_word(agp_bridge->dev, INTEL_NBXCFG, &temp2);
 pci_write_config_word(agp_bridge->dev, INTEL_NBXCFG, temp2 | (1 << 9));
 /* clear any possible AGP-related error conditions */
 pci_write_config_word(agp_bridge->dev, INTEL_I830_ERRSTS, 0x1c);
 return 0;
}

static int intel_7505_configure(void)
{
 u16 temp2;
 struct aper_size_info_8 *current_size;

 current_size = A_SIZE_8(agp_bridge->current_size);

 /* aperture size */
 pci_write_config_byte(agp_bridge->dev, INTEL_APSIZE, current_size->size_value);

 /* address to map to */
 agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev,
          AGP_APERTURE_BAR);

 /* attbase - aperture base */
 pci_write_config_dword(agp_bridge->dev, INTEL_ATTBASE, agp_bridge->gatt_bus_addr);

 /* agpctrl */
 pci_write_config_dword(agp_bridge->dev, INTEL_AGPCTRL, 0x0000);

 /* mchcfg */
 pci_read_config_word(agp_bridge->dev, INTEL_I7505_MCHCFG, &temp2);
 pci_write_config_word(agp_bridge->dev, INTEL_I7505_MCHCFG, temp2 | (1 << 9));

 return 0;
}

/* Setup function */
static const struct gatt_mask intel_generic_masks[] =
{
 {.mask = 0x00000017, .type = 0}
};

static const struct aper_size_info_8 intel_815_sizes[2] =
{
 {64, 16384, 4, 0},
 {32, 8192, 3, 8},
};

static const struct aper_size_info_8 intel_8xx_sizes[7] =
{
 {256, 65536, 6, 0},
 {128, 32768, 5, 32},
 {64, 16384, 4, 48},
 {32, 8192, 3, 56},
 {16, 4096, 2, 60},
 {8, 2048, 1, 62},
 {4, 1024, 0, 63}
};

static const struct aper_size_info_16 intel_generic_sizes[7] =
{
 {256, 65536, 6, 0},
 {128, 32768, 5, 32},
 {64, 16384, 4, 48},
 {32, 8192, 3, 56},
 {16, 4096, 2, 60},
 {8, 2048, 1, 62},
 {4, 1024, 0, 63}
};

static const struct aper_size_info_8 intel_830mp_sizes[4] =
{
 {256, 65536, 6, 0},
 {128, 32768, 5, 32},
 {64, 16384, 4, 48},
 {32, 8192, 3, 56}
};

static const struct agp_bridge_driver intel_generic_driver = {
 .owner   = THIS_MODULE,
 .aperture_sizes  = intel_generic_sizes,
 .size_type  = U16_APER_SIZE,
 .num_aperture_sizes = 7,
 .needs_scratch_page = true,
 .configure  = intel_configure,
 .fetch_size  = intel_fetch_size,
 .cleanup  = intel_cleanup,
 .tlb_flush  = intel_tlbflush,
 .mask_memory  = agp_generic_mask_memory,
 .masks   = intel_generic_masks,
 .agp_enable  = agp_generic_enable,
 .cache_flush  = global_cache_flush,
 .create_gatt_table = agp_generic_create_gatt_table,
 .free_gatt_table = agp_generic_free_gatt_table,
 .insert_memory  = agp_generic_insert_memory,
 .remove_memory  = agp_generic_remove_memory,
 .alloc_by_type  = agp_generic_alloc_by_type,
 .free_by_type  = agp_generic_free_by_type,
 .agp_alloc_page  = agp_generic_alloc_page,
 .agp_alloc_pages        = agp_generic_alloc_pages,
 .agp_destroy_page = agp_generic_destroy_page,
 .agp_destroy_pages      = agp_generic_destroy_pages,
 .agp_type_to_mask_type  = agp_generic_type_to_mask_type,
};

static const struct agp_bridge_driver intel_815_driver = {
 .owner   = THIS_MODULE,
 .aperture_sizes  = intel_815_sizes,
 .size_type  = U8_APER_SIZE,
 .num_aperture_sizes = 2,
 .needs_scratch_page = true,
 .configure  = intel_815_configure,
 .fetch_size  = intel_815_fetch_size,
 .cleanup  = intel_8xx_cleanup,
 .tlb_flush  = intel_8xx_tlbflush,
 .mask_memory  = agp_generic_mask_memory,
 .masks   = intel_generic_masks,
 .agp_enable  = agp_generic_enable,
 .cache_flush  = global_cache_flush,
 .create_gatt_table = agp_generic_create_gatt_table,
 .free_gatt_table = agp_generic_free_gatt_table,
 .insert_memory  = agp_generic_insert_memory,
 .remove_memory  = agp_generic_remove_memory,
 .alloc_by_type  = agp_generic_alloc_by_type,
 .free_by_type  = agp_generic_free_by_type,
 .agp_alloc_page  = agp_generic_alloc_page,
 .agp_alloc_pages        = agp_generic_alloc_pages,
 .agp_destroy_page = agp_generic_destroy_page,
 .agp_destroy_pages      = agp_generic_destroy_pages,
 .agp_type_to_mask_type = agp_generic_type_to_mask_type,
};

static const struct agp_bridge_driver intel_820_driver = {
 .owner   = THIS_MODULE,
 .aperture_sizes  = intel_8xx_sizes,
 .size_type  = U8_APER_SIZE,
 .num_aperture_sizes = 7,
 .needs_scratch_page = true,
 .configure  = intel_820_configure,
 .fetch_size  = intel_8xx_fetch_size,
 .cleanup  = intel_820_cleanup,
 .tlb_flush  = intel_820_tlbflush,
 .mask_memory  = agp_generic_mask_memory,
 .masks   = intel_generic_masks,
 .agp_enable  = agp_generic_enable,
 .cache_flush  = global_cache_flush,
 .create_gatt_table = agp_generic_create_gatt_table,
 .free_gatt_table = agp_generic_free_gatt_table,
 .insert_memory  = agp_generic_insert_memory,
 .remove_memory  = agp_generic_remove_memory,
 .alloc_by_type  = agp_generic_alloc_by_type,
 .free_by_type  = agp_generic_free_by_type,
 .agp_alloc_page  = agp_generic_alloc_page,
 .agp_alloc_pages        = agp_generic_alloc_pages,
 .agp_destroy_page = agp_generic_destroy_page,
 .agp_destroy_pages      = agp_generic_destroy_pages,
 .agp_type_to_mask_type  = agp_generic_type_to_mask_type,
};

static const struct agp_bridge_driver intel_830mp_driver = {
 .owner   = THIS_MODULE,
 .aperture_sizes  = intel_830mp_sizes,
 .size_type  = U8_APER_SIZE,
 .num_aperture_sizes = 4,
 .needs_scratch_page = true,
 .configure  = intel_830mp_configure,
 .fetch_size  = intel_8xx_fetch_size,
 .cleanup  = intel_8xx_cleanup,
 .tlb_flush  = intel_8xx_tlbflush,
 .mask_memory  = agp_generic_mask_memory,
 .masks   = intel_generic_masks,
 .agp_enable  = agp_generic_enable,
 .cache_flush  = global_cache_flush,
 .create_gatt_table = agp_generic_create_gatt_table,
 .free_gatt_table = agp_generic_free_gatt_table,
 .insert_memory  = agp_generic_insert_memory,
 .remove_memory  = agp_generic_remove_memory,
 .alloc_by_type  = agp_generic_alloc_by_type,
 .free_by_type  = agp_generic_free_by_type,
 .agp_alloc_page  = agp_generic_alloc_page,
 .agp_alloc_pages        = agp_generic_alloc_pages,
 .agp_destroy_page = agp_generic_destroy_page,
 .agp_destroy_pages      = agp_generic_destroy_pages,
 .agp_type_to_mask_type  = agp_generic_type_to_mask_type,
};

static const struct agp_bridge_driver intel_840_driver = {
 .owner   = THIS_MODULE,
 .aperture_sizes  = intel_8xx_sizes,
 .size_type  = U8_APER_SIZE,
 .num_aperture_sizes = 7,
 .needs_scratch_page = true,
 .configure  = intel_840_configure,
 .fetch_size  = intel_8xx_fetch_size,
 .cleanup  = intel_8xx_cleanup,
 .tlb_flush  = intel_8xx_tlbflush,
 .mask_memory  = agp_generic_mask_memory,
 .masks   = intel_generic_masks,
 .agp_enable  = agp_generic_enable,
 .cache_flush  = global_cache_flush,
 .create_gatt_table = agp_generic_create_gatt_table,
 .free_gatt_table = agp_generic_free_gatt_table,
 .insert_memory  = agp_generic_insert_memory,
 .remove_memory  = agp_generic_remove_memory,
 .alloc_by_type  = agp_generic_alloc_by_type,
 .free_by_type  = agp_generic_free_by_type,
 .agp_alloc_page  = agp_generic_alloc_page,
 .agp_alloc_pages        = agp_generic_alloc_pages,
 .agp_destroy_page = agp_generic_destroy_page,
 .agp_destroy_pages      = agp_generic_destroy_pages,
 .agp_type_to_mask_type  = agp_generic_type_to_mask_type,
};

static const struct agp_bridge_driver intel_845_driver = {
 .owner   = THIS_MODULE,
 .aperture_sizes  = intel_8xx_sizes,
 .size_type  = U8_APER_SIZE,
 .num_aperture_sizes = 7,
 .needs_scratch_page = true,
 .configure  = intel_845_configure,
 .fetch_size  = intel_8xx_fetch_size,
 .cleanup  = intel_8xx_cleanup,
 .tlb_flush  = intel_8xx_tlbflush,
 .mask_memory  = agp_generic_mask_memory,
 .masks   = intel_generic_masks,
 .agp_enable  = agp_generic_enable,
 .cache_flush  = global_cache_flush,
 .create_gatt_table = agp_generic_create_gatt_table,
 .free_gatt_table = agp_generic_free_gatt_table,
 .insert_memory  = agp_generic_insert_memory,
 .remove_memory  = agp_generic_remove_memory,
 .alloc_by_type  = agp_generic_alloc_by_type,
 .free_by_type  = agp_generic_free_by_type,
 .agp_alloc_page  = agp_generic_alloc_page,
 .agp_alloc_pages        = agp_generic_alloc_pages,
 .agp_destroy_page = agp_generic_destroy_page,
 .agp_destroy_pages      = agp_generic_destroy_pages,
 .agp_type_to_mask_type  = agp_generic_type_to_mask_type,
};

static const struct agp_bridge_driver intel_850_driver = {
 .owner   = THIS_MODULE,
 .aperture_sizes  = intel_8xx_sizes,
 .size_type  = U8_APER_SIZE,
 .num_aperture_sizes = 7,
 .needs_scratch_page = true,
 .configure  = intel_850_configure,
 .fetch_size  = intel_8xx_fetch_size,
 .cleanup  = intel_8xx_cleanup,
 .tlb_flush  = intel_8xx_tlbflush,
 .mask_memory  = agp_generic_mask_memory,
 .masks   = intel_generic_masks,
 .agp_enable  = agp_generic_enable,
 .cache_flush  = global_cache_flush,
 .create_gatt_table = agp_generic_create_gatt_table,
 .free_gatt_table = agp_generic_free_gatt_table,
 .insert_memory  = agp_generic_insert_memory,
 .remove_memory  = agp_generic_remove_memory,
 .alloc_by_type  = agp_generic_alloc_by_type,
 .free_by_type  = agp_generic_free_by_type,
 .agp_alloc_page  = agp_generic_alloc_page,
 .agp_alloc_pages        = agp_generic_alloc_pages,
 .agp_destroy_page = agp_generic_destroy_page,
 .agp_destroy_pages      = agp_generic_destroy_pages,
 .agp_type_to_mask_type  = agp_generic_type_to_mask_type,
};

static const struct agp_bridge_driver intel_860_driver = {
 .owner   = THIS_MODULE,
 .aperture_sizes  = intel_8xx_sizes,
 .size_type  = U8_APER_SIZE,
 .num_aperture_sizes = 7,
 .needs_scratch_page = true,
 .configure  = intel_860_configure,
 .fetch_size  = intel_8xx_fetch_size,
 .cleanup  = intel_8xx_cleanup,
 .tlb_flush  = intel_8xx_tlbflush,
 .mask_memory  = agp_generic_mask_memory,
 .masks   = intel_generic_masks,
 .agp_enable  = agp_generic_enable,
 .cache_flush  = global_cache_flush,
 .create_gatt_table = agp_generic_create_gatt_table,
 .free_gatt_table = agp_generic_free_gatt_table,
 .insert_memory  = agp_generic_insert_memory,
 .remove_memory  = agp_generic_remove_memory,
 .alloc_by_type  = agp_generic_alloc_by_type,
 .free_by_type  = agp_generic_free_by_type,
 .agp_alloc_page  = agp_generic_alloc_page,
 .agp_alloc_pages        = agp_generic_alloc_pages,
 .agp_destroy_page = agp_generic_destroy_page,
 .agp_destroy_pages      = agp_generic_destroy_pages,
 .agp_type_to_mask_type  = agp_generic_type_to_mask_type,
};

static const struct agp_bridge_driver intel_7505_driver = {
 .owner   = THIS_MODULE,
 .aperture_sizes  = intel_8xx_sizes,
 .size_type  = U8_APER_SIZE,
 .num_aperture_sizes = 7,
 .needs_scratch_page = true,
 .configure  = intel_7505_configure,
 .fetch_size  = intel_8xx_fetch_size,
 .cleanup  = intel_8xx_cleanup,
 .tlb_flush  = intel_8xx_tlbflush,
 .mask_memory  = agp_generic_mask_memory,
 .masks   = intel_generic_masks,
 .agp_enable  = agp_generic_enable,
 .cache_flush  = global_cache_flush,
 .create_gatt_table = agp_generic_create_gatt_table,
 .free_gatt_table = agp_generic_free_gatt_table,
 .insert_memory  = agp_generic_insert_memory,
 .remove_memory  = agp_generic_remove_memory,
 .alloc_by_type  = agp_generic_alloc_by_type,
 .free_by_type  = agp_generic_free_by_type,
 .agp_alloc_page  = agp_generic_alloc_page,
 .agp_alloc_pages        = agp_generic_alloc_pages,
 .agp_destroy_page = agp_generic_destroy_page,
 .agp_destroy_pages      = agp_generic_destroy_pages,
 .agp_type_to_mask_type  = agp_generic_type_to_mask_type,
};

/* Table to describe Intel GMCH and AGP/PCIE GART drivers.  At least one of
 * driver and gmch_driver must be non-null, and find_gmch will determine
 * which one should be used if a gmch_chip_id is present.
 */
static const struct intel_agp_driver_description {
 unsigned int chip_id;
 char *name;
 const struct agp_bridge_driver *driver;
} intel_agp_chipsets[] = {
 { PCI_DEVICE_ID_INTEL_82443LX_0, "440LX", &intel_generic_driver },
 { PCI_DEVICE_ID_INTEL_82443BX_0, "440BX", &intel_generic_driver },
 { PCI_DEVICE_ID_INTEL_82443GX_0, "440GX", &intel_generic_driver },
 { PCI_DEVICE_ID_INTEL_82815_MC, "i815", &intel_815_driver },
 { PCI_DEVICE_ID_INTEL_82820_HB, "i820", &intel_820_driver },
 { PCI_DEVICE_ID_INTEL_82820_UP_HB, "i820", &intel_820_driver },
 { PCI_DEVICE_ID_INTEL_82830_HB, "830M", &intel_830mp_driver },
 { PCI_DEVICE_ID_INTEL_82840_HB, "i840", &intel_840_driver },
 { PCI_DEVICE_ID_INTEL_82845_HB, "i845", &intel_845_driver },
 { PCI_DEVICE_ID_INTEL_82845G_HB, "845G", &intel_845_driver },
 { PCI_DEVICE_ID_INTEL_82850_HB, "i850", &intel_850_driver },
 { PCI_DEVICE_ID_INTEL_82854_HB, "854", &intel_845_driver },
 { PCI_DEVICE_ID_INTEL_82855PM_HB, "855PM", &intel_845_driver },
 { PCI_DEVICE_ID_INTEL_82855GM_HB, "855GM", &intel_845_driver },
 { PCI_DEVICE_ID_INTEL_82860_HB, "i860", &intel_860_driver },
 { PCI_DEVICE_ID_INTEL_82865_HB, "865", &intel_845_driver },
 { PCI_DEVICE_ID_INTEL_82875_HB, "i875", &intel_845_driver },
 { PCI_DEVICE_ID_INTEL_7505_0, "E7505", &intel_7505_driver },
 { PCI_DEVICE_ID_INTEL_7205_0, "E7205", &intel_7505_driver },
 { 0, NULL, NULL }
};

static int agp_intel_probe(struct pci_dev *pdev,
      const struct pci_device_id *ent)
{
 struct agp_bridge_data *bridge;
 u8 cap_ptr = 0;
 struct resource *r;
 int i, err;

 cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);

 bridge = agp_alloc_bridge();
 if (!bridge)
  return -ENOMEM;

 bridge->capndx = cap_ptr;

 if (intel_gmch_probe(pdev, NULL, bridge))
  goto found_gmch;

 for (i = 0; intel_agp_chipsets[i].name != NULL; i++) {
  /* In case that multiple models of gfx chip may
   stand on same host bridge type, this can be
   sure we detect the right IGD. */
  if (pdev->device == intel_agp_chipsets[i].chip_id) {
   bridge->driver = intel_agp_chipsets[i].driver;
   break;
  }
 }

 if (!bridge->driver) {
  if (cap_ptr)
   dev_warn(&pdev->dev, "unsupported Intel chipset [%04x/%04x]\n",
     pdev->vendor, pdev->device);
  agp_put_bridge(bridge);
  return -ENODEV;
 }

 bridge->dev = pdev;
 bridge->dev_private_data = NULL;

 dev_info(&pdev->dev, "Intel %s Chipset\n", intel_agp_chipsets[i].name);

 /*
* The following fixes the case where the BIOS has "forgotten" to
* provide an address range for the GART.
* 20030610 - hamish@zot.org
* This happens before pci_enable_device() intentionally;
* calling pci_enable_device() before assigning the resource
* will result in the GART being disabled on machines with such
* BIOSs (the GART ends up with a BAR starting at 0, which
* conflicts a lot of other devices).
*/
 r = &pdev->resource[0];
 if (!r->start && r->end) {
  if (pci_assign_resource(pdev, 0)) {
   dev_err(&pdev->dev, "can't assign resource 0\n");
   agp_put_bridge(bridge);
   return -ENODEV;
  }
 }

 /*
* If the device has not been properly setup, the following will catch
* the problem and should stop the system from crashing.
* 20030610 - hamish@zot.org
*/
 if (pci_enable_device(pdev)) {
  dev_err(&pdev->dev, "can't enable PCI device\n");
  agp_put_bridge(bridge);
  return -ENODEV;
 }

 /* Fill in the mode register */
 if (cap_ptr) {
  pci_read_config_dword(pdev,
    bridge->capndx+PCI_AGP_STATUS,
    &bridge->mode);
 }

found_gmch:
 pci_set_drvdata(pdev, bridge);
 err = agp_add_bridge(bridge);
 return err;
}

static void agp_intel_remove(struct pci_dev *pdev)
{
 struct agp_bridge_data *bridge = pci_get_drvdata(pdev);

 agp_remove_bridge(bridge);

 intel_gmch_remove();

 agp_put_bridge(bridge);
}

static int agp_intel_resume(struct device *dev)
{
 struct pci_dev *pdev = to_pci_dev(dev);
 struct agp_bridge_data *bridge = pci_get_drvdata(pdev);

 bridge->driver->configure();

 return 0;
}

static const struct pci_device_id agp_intel_pci_table[] = {
#define ID(x)      \
 {      \
 .class  = (PCI_CLASS_BRIDGE_HOST << 8), \
 .class_mask = ~0,    \
 .vendor  = PCI_VENDOR_ID_INTEL,  \
 .device  = x,    \
 .subvendor = PCI_ANY_ID,   \
 .subdevice = PCI_ANY_ID,   \
 }
 ID(PCI_DEVICE_ID_INTEL_82441), /* for HAS2 support */
 ID(PCI_DEVICE_ID_INTEL_82443LX_0),
 ID(PCI_DEVICE_ID_INTEL_82443BX_0),
 ID(PCI_DEVICE_ID_INTEL_82443GX_0),
 ID(PCI_DEVICE_ID_INTEL_82810_MC1),
 ID(PCI_DEVICE_ID_INTEL_82810_MC3),
 ID(PCI_DEVICE_ID_INTEL_82810E_MC),
 ID(PCI_DEVICE_ID_INTEL_82815_MC),
 ID(PCI_DEVICE_ID_INTEL_82820_HB),
 ID(PCI_DEVICE_ID_INTEL_82820_UP_HB),
 ID(PCI_DEVICE_ID_INTEL_82830_HB),
 ID(PCI_DEVICE_ID_INTEL_82840_HB),
 ID(PCI_DEVICE_ID_INTEL_82845_HB),
 ID(PCI_DEVICE_ID_INTEL_82845G_HB),
 ID(PCI_DEVICE_ID_INTEL_82850_HB),
 ID(PCI_DEVICE_ID_INTEL_82854_HB),
 ID(PCI_DEVICE_ID_INTEL_82855PM_HB),
 ID(PCI_DEVICE_ID_INTEL_82855GM_HB),
 ID(PCI_DEVICE_ID_INTEL_82860_HB),
 ID(PCI_DEVICE_ID_INTEL_82865_HB),
 ID(PCI_DEVICE_ID_INTEL_82875_HB),
 ID(PCI_DEVICE_ID_INTEL_7505_0),
 ID(PCI_DEVICE_ID_INTEL_7205_0),
 ID(PCI_DEVICE_ID_INTEL_E7221_HB),
 ID(PCI_DEVICE_ID_INTEL_82915G_HB),
 ID(PCI_DEVICE_ID_INTEL_82915GM_HB),
 ID(PCI_DEVICE_ID_INTEL_82945G_HB),
 ID(PCI_DEVICE_ID_INTEL_82945GM_HB),
 ID(PCI_DEVICE_ID_INTEL_82945GME_HB),
 ID(PCI_DEVICE_ID_INTEL_PINEVIEW_M_HB),
 ID(PCI_DEVICE_ID_INTEL_PINEVIEW_HB),
 ID(PCI_DEVICE_ID_INTEL_82946GZ_HB),
 ID(PCI_DEVICE_ID_INTEL_82G35_HB),
 ID(PCI_DEVICE_ID_INTEL_82965Q_HB),
 ID(PCI_DEVICE_ID_INTEL_82965G_HB),
 ID(PCI_DEVICE_ID_INTEL_82965GM_HB),
 ID(PCI_DEVICE_ID_INTEL_82965GME_HB),
 ID(PCI_DEVICE_ID_INTEL_G33_HB),
 ID(PCI_DEVICE_ID_INTEL_Q35_HB),
 ID(PCI_DEVICE_ID_INTEL_Q33_HB),
 ID(PCI_DEVICE_ID_INTEL_GM45_HB),
 ID(PCI_DEVICE_ID_INTEL_EAGLELAKE_HB),
 ID(PCI_DEVICE_ID_INTEL_Q45_HB),
 ID(PCI_DEVICE_ID_INTEL_G45_HB),
 ID(PCI_DEVICE_ID_INTEL_G41_HB),
 ID(PCI_DEVICE_ID_INTEL_B43_HB),
 ID(PCI_DEVICE_ID_INTEL_B43_1_HB),
 ID(PCI_DEVICE_ID_INTEL_IRONLAKE_D_HB),
 ID(PCI_DEVICE_ID_INTEL_IRONLAKE_D2_HB),
 ID(PCI_DEVICE_ID_INTEL_IRONLAKE_M_HB),
 ID(PCI_DEVICE_ID_INTEL_IRONLAKE_MA_HB),
 ID(PCI_DEVICE_ID_INTEL_IRONLAKE_MC2_HB),
 { }
};

MODULE_DEVICE_TABLE(pci, agp_intel_pci_table);

static DEFINE_SIMPLE_DEV_PM_OPS(agp_intel_pm_ops, NULL, agp_intel_resume);

static struct pci_driver agp_intel_pci_driver = {
 .name  = "agpgart-intel",
 .id_table = agp_intel_pci_table,
 .probe  = agp_intel_probe,
 .remove  = agp_intel_remove,
 .driver.pm = &agp_intel_pm_ops,
};

static int __init agp_intel_init(void)
{
 if (agp_off)
  return -EINVAL;
 return pci_register_driver(&agp_intel_pci_driver);
}

static void __exit agp_intel_cleanup(void)
{
 pci_unregister_driver(&agp_intel_pci_driver);
}

module_init(agp_intel_init);
module_exit(agp_intel_cleanup);

MODULE_AUTHOR("Dave Jones, Various @Intel");
MODULE_DESCRIPTION("Intel AGPGART routines");
MODULE_LICENSE("GPL and additional rights");