intel-agp.c

linux-2.6.15.6

	/* 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) {
		printk (KERN_EMERG PFX "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 */
	pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
	agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);

	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)
{
	u32 temp;
	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 */
	pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
	agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);

	/* 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)
{
	u32 temp;
	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 */
	pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
	agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);

	/* 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)
{
	u32 temp;
	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 */
		pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
		agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
		agp_bridge->apbase_config = temp;
	}

	/* 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)
{
	u32 temp;
	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 */
	pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
	agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);

	/* 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)
{
	u32 temp;
	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 */
	pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
	agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);

	/* 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)
{
	u32 temp;
	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 */
	pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
	agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);

	/* 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)
{
	u32 temp;
	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 */
	pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
	agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);

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

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

static 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 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 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 struct agp_bridge_driver intel_generic_driver = {
	.owner			= THIS_MODULE,
	.aperture_sizes		= intel_generic_sizes,
	.size_type		= U16_APER_SIZE,
	.num_aperture_sizes	= 7,
	.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_destroy_page	= agp_generic_destroy_page,
};

static struct agp_bridge_driver intel_810_driver = {
	.owner			= THIS_MODULE,
	.aperture_sizes		= intel_i810_sizes,
	.size_type		= FIXED_APER_SIZE,
	.num_aperture_sizes	= 2,
	.needs_scratch_page	= TRUE,
	.configure		= intel_i810_configure,
	.fetch_size		= intel_i810_fetch_size,
	.cleanup		= intel_i810_cleanup,
	.tlb_flush		= intel_i810_tlbflush,
	.mask_memory		= intel_i810_mask_memory,
	.masks			= intel_i810_masks,
	.agp_enable		= intel_i810_agp_enable,
	.cache_flush		= global_cache_flush,
	.create_gatt_table	= agp_generic_create_gatt_table,
	.free_gatt_table	= agp_generic_free_gatt_table,
	.insert_memory		= intel_i810_insert_entries,
	.remove_memory		= intel_i810_remove_entries,
	.alloc_by_type		= intel_i810_alloc_by_type,
	.free_by_type		= intel_i810_free_by_type,
	.agp_alloc_page		= agp_generic_alloc_page,
	.agp_destroy_page	= agp_generic_destroy_page,
};

static struct agp_bridge_driver intel_815_driver = {
	.owner			= THIS_MODULE,
	.aperture_sizes		= intel_815_sizes,
	.size_type		= U8_APER_SIZE,
	.num_aperture_sizes	= 2,
	.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_destroy_page	= agp_generic_destroy_page,
};

static struct agp_bridge_driver intel_830_driver = {
	.owner			= THIS_MODULE,
	.aperture_sizes		= intel_i830_sizes,
	.size_type		= FIXED_APER_SIZE,
	.num_aperture_sizes	= 3,
	.needs_scratch_page	= TRUE,
	.configure		= intel_i830_configure,
	.fetch_size		= intel_i830_fetch_size,
	.cleanup		= intel_i830_cleanup,
	.tlb_flush		= intel_i810_tlbflush,
	.mask_memory		= intel_i810_mask_memory,
	.masks			= intel_i810_masks,
	.agp_enable		= intel_i810_agp_enable,
	.cache_flush		= global_cache_flush,
	.create_gatt_table	= intel_i830_create_gatt_table,
	.free_gatt_table	= intel_i830_free_gatt_table,
	.insert_memory		= intel_i830_insert_entries,
	.remove_memory		= intel_i830_remove_entries,
	.alloc_by_type		= intel_i830_alloc_by_type,
	.free_by_type		= intel_i810_free_by_type,
	.agp_alloc_page		= agp_generic_alloc_page,
	.agp_destroy_page	= agp_generic_destroy_page,
};

static struct agp_bridge_driver intel_820_driver = {
	.owner			= THIS_MODULE,
	.aperture_sizes		= intel_8xx_sizes,
	.size_type		= U8_APER_SIZE,
	.num_aperture_sizes	= 7,
	.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_destroy_page	= agp_generic_destroy_page,
};

static struct agp_bridge_driver intel_830mp_driver = {
	.owner			= THIS_MODULE,
	.aperture_sizes		= intel_830mp_sizes,
	.size_type		= U8_APER_SIZE,
	.num_aperture_sizes	= 4,
	.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_destroy_page	= agp_generic_destroy_page,
};

static struct agp_bridge_driver intel_840_driver = {
	.owner			= THIS_MODULE,
	.aperture_sizes		= intel_8xx_sizes,
	.size_type		= U8_APER_SIZE,
	.num_aperture_sizes	= 7,
	.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,