intel-gtt.c 39.1 KB
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/*
 * Intel GTT (Graphics Translation Table) routines
 *
 * Caveat: This driver implements the linux agp interface, but this is far from
 * a agp driver! GTT support ended up here for purely historical reasons: The
 * old userspace intel graphics drivers needed an interface to map memory into
 * the GTT. And the drm provides a default interface for graphic devices sitting
 * on an agp port. So it made sense to fake the GTT support as an agp port to
 * avoid having to create a new api.
 *
 * With gem this does not make much sense anymore, just needlessly complicates
 * the code. But as long as the old graphics stack is still support, it's stuck
 * here.
 *
 * /fairy-tale-mode off
 */

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#include <linux/module.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/pagemap.h>
#include <linux/agp_backend.h>
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#include <linux/delay.h>
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#include <asm/smp.h>
#include "agp.h"
#include "intel-agp.h"
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#include <drm/intel-gtt.h>
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/*
 * If we have Intel graphics, we're not going to have anything other than
 * an Intel IOMMU. So make the correct use of the PCI DMA API contingent
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 * on the Intel IOMMU support (CONFIG_INTEL_IOMMU).
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 * Only newer chipsets need to bother with this, of course.
 */
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#ifdef CONFIG_INTEL_IOMMU
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#define USE_PCI_DMA_API 1
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#else
#define USE_PCI_DMA_API 0
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#endif

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struct intel_gtt_driver {
	unsigned int gen : 8;
	unsigned int is_g33 : 1;
	unsigned int is_pineview : 1;
	unsigned int is_ironlake : 1;
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	unsigned int has_pgtbl_enable : 1;
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	unsigned int dma_mask_size : 8;
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	/* Chipset specific GTT setup */
	int (*setup)(void);
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	/* This should undo anything done in ->setup() save the unmapping
	 * of the mmio register file, that's done in the generic code. */
	void (*cleanup)(void);
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	void (*write_entry)(dma_addr_t addr, unsigned int entry, unsigned int flags);
	/* Flags is a more or less chipset specific opaque value.
	 * For chipsets that need to support old ums (non-gem) code, this
	 * needs to be identical to the various supported agp memory types! */
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	bool (*check_flags)(unsigned int flags);
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	void (*chipset_flush)(void);
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};

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static struct _intel_private {
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	struct intel_gtt base;
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	const struct intel_gtt_driver *driver;
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	struct pci_dev *pcidev;	/* device one */
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	struct pci_dev *bridge_dev;
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	u8 __iomem *registers;
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	phys_addr_t gtt_bus_addr;
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	phys_addr_t gma_bus_addr;
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	u32 PGETBL_save;
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	u32 __iomem *gtt;		/* I915G */
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	bool clear_fake_agp; /* on first access via agp, fill with scratch */
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	int num_dcache_entries;
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	void __iomem *i9xx_flush_page;
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	char *i81x_gtt_table;
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	struct resource ifp_resource;
	int resource_valid;
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	struct page *scratch_page;
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} intel_private;

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#define INTEL_GTT_GEN	intel_private.driver->gen
#define IS_G33		intel_private.driver->is_g33
#define IS_PINEVIEW	intel_private.driver->is_pineview
#define IS_IRONLAKE	intel_private.driver->is_ironlake
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#define HAS_PGTBL_EN	intel_private.driver->has_pgtbl_enable
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int intel_gtt_map_memory(struct page **pages, unsigned int num_entries,
			 struct scatterlist **sg_list, int *num_sg)
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{
	struct sg_table st;
	struct scatterlist *sg;
	int i;

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	if (*sg_list)
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		return 0; /* already mapped (for e.g. resume */

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	DBG("try mapping %lu pages\n", (unsigned long)num_entries);
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	if (sg_alloc_table(&st, num_entries, GFP_KERNEL))
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		goto err;
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	*sg_list = sg = st.sgl;
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	for (i = 0 ; i < num_entries; i++, sg = sg_next(sg))
		sg_set_page(sg, pages[i], PAGE_SIZE, 0);
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	*num_sg = pci_map_sg(intel_private.pcidev, *sg_list,
				 num_entries, PCI_DMA_BIDIRECTIONAL);
	if (unlikely(!*num_sg))
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		goto err;

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	return 0;
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err:
	sg_free_table(&st);
	return -ENOMEM;
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}
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EXPORT_SYMBOL(intel_gtt_map_memory);
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void intel_gtt_unmap_memory(struct scatterlist *sg_list, int num_sg)
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{
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	struct sg_table st;
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	DBG("try unmapping %lu pages\n", (unsigned long)mem->page_count);

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	pci_unmap_sg(intel_private.pcidev, sg_list,
		     num_sg, PCI_DMA_BIDIRECTIONAL);

	st.sgl = sg_list;
	st.orig_nents = st.nents = num_sg;

	sg_free_table(&st);
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}
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EXPORT_SYMBOL(intel_gtt_unmap_memory);
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static void intel_fake_agp_enable(struct agp_bridge_data *bridge, u32 mode)
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{
	return;
}

/* Exists to support ARGB cursors */
static struct page *i8xx_alloc_pages(void)
{
	struct page *page;

	page = alloc_pages(GFP_KERNEL | GFP_DMA32, 2);
	if (page == NULL)
		return NULL;

	if (set_pages_uc(page, 4) < 0) {
		set_pages_wb(page, 4);
		__free_pages(page, 2);
		return NULL;
	}
	get_page(page);
	atomic_inc(&agp_bridge->current_memory_agp);
	return page;
}

static void i8xx_destroy_pages(struct page *page)
{
	if (page == NULL)
		return;

	set_pages_wb(page, 4);
	put_page(page);
	__free_pages(page, 2);
	atomic_dec(&agp_bridge->current_memory_agp);
}

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#define I810_GTT_ORDER 4
static int i810_setup(void)
{
	u32 reg_addr;
	char *gtt_table;

	/* i81x does not preallocate the gtt. It's always 64kb in size. */
	gtt_table = alloc_gatt_pages(I810_GTT_ORDER);
	if (gtt_table == NULL)
		return -ENOMEM;
	intel_private.i81x_gtt_table = gtt_table;

	pci_read_config_dword(intel_private.pcidev, I810_MMADDR, &reg_addr);
	reg_addr &= 0xfff80000;

	intel_private.registers = ioremap(reg_addr, KB(64));
	if (!intel_private.registers)
		return -ENOMEM;

	writel(virt_to_phys(gtt_table) | I810_PGETBL_ENABLED,
	       intel_private.registers+I810_PGETBL_CTL);

	intel_private.gtt_bus_addr = reg_addr + I810_PTE_BASE;

	if ((readl(intel_private.registers+I810_DRAM_CTL)
		& I810_DRAM_ROW_0) == I810_DRAM_ROW_0_SDRAM) {
		dev_info(&intel_private.pcidev->dev,
			 "detected 4MB dedicated video ram\n");
		intel_private.num_dcache_entries = 1024;
	}

	return 0;
}

static void i810_cleanup(void)
{
	writel(0, intel_private.registers+I810_PGETBL_CTL);
	free_gatt_pages(intel_private.i81x_gtt_table, I810_GTT_ORDER);
}

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static int i810_insert_dcache_entries(struct agp_memory *mem, off_t pg_start,
				      int type)
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{
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	int i;
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	if ((pg_start + mem->page_count)
			> intel_private.num_dcache_entries)
		return -EINVAL;
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	if (!mem->is_flushed)
		global_cache_flush();
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	for (i = pg_start; i < (pg_start + mem->page_count); i++) {
		dma_addr_t addr = i << PAGE_SHIFT;
		intel_private.driver->write_entry(addr,
						  i, type);
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	}
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	readl(intel_private.gtt+i-1);
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	return 0;
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}

/*
 * The i810/i830 requires a physical address to program its mouse
 * pointer into hardware.
 * However the Xserver still writes to it through the agp aperture.
 */
static struct agp_memory *alloc_agpphysmem_i8xx(size_t pg_count, int type)
{
	struct agp_memory *new;
	struct page *page;

	switch (pg_count) {
	case 1: page = agp_bridge->driver->agp_alloc_page(agp_bridge);
		break;
	case 4:
		/* kludge to get 4 physical pages for ARGB cursor */
		page = i8xx_alloc_pages();
		break;
	default:
		return NULL;
	}

	if (page == NULL)
		return NULL;

	new = agp_create_memory(pg_count);
	if (new == NULL)
		return NULL;

	new->pages[0] = page;
	if (pg_count == 4) {
		/* kludge to get 4 physical pages for ARGB cursor */
		new->pages[1] = new->pages[0] + 1;
		new->pages[2] = new->pages[1] + 1;
		new->pages[3] = new->pages[2] + 1;
	}
	new->page_count = pg_count;
	new->num_scratch_pages = pg_count;
	new->type = AGP_PHYS_MEMORY;
	new->physical = page_to_phys(new->pages[0]);
	return new;
}

static void intel_i810_free_by_type(struct agp_memory *curr)
{
	agp_free_key(curr->key);
	if (curr->type == AGP_PHYS_MEMORY) {
		if (curr->page_count == 4)
			i8xx_destroy_pages(curr->pages[0]);
		else {
			agp_bridge->driver->agp_destroy_page(curr->pages[0],
							     AGP_PAGE_DESTROY_UNMAP);
			agp_bridge->driver->agp_destroy_page(curr->pages[0],
							     AGP_PAGE_DESTROY_FREE);
		}
		agp_free_page_array(curr);
	}
	kfree(curr);
}

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static int intel_gtt_setup_scratch_page(void)
{
	struct page *page;
	dma_addr_t dma_addr;

	page = alloc_page(GFP_KERNEL | GFP_DMA32 | __GFP_ZERO);
	if (page == NULL)
		return -ENOMEM;
	get_page(page);
	set_pages_uc(page, 1);

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	if (intel_private.base.needs_dmar) {
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		dma_addr = pci_map_page(intel_private.pcidev, page, 0,
				    PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
		if (pci_dma_mapping_error(intel_private.pcidev, dma_addr))
			return -EINVAL;

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		intel_private.base.scratch_page_dma = dma_addr;
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	} else
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		intel_private.base.scratch_page_dma = page_to_phys(page);
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	intel_private.scratch_page = page;

	return 0;
}

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static void i810_write_entry(dma_addr_t addr, unsigned int entry,
			     unsigned int flags)
{
	u32 pte_flags = I810_PTE_VALID;

	switch (flags) {
	case AGP_DCACHE_MEMORY:
		pte_flags |= I810_PTE_LOCAL;
		break;
	case AGP_USER_CACHED_MEMORY:
		pte_flags |= I830_PTE_SYSTEM_CACHED;
		break;
	}

	writel(addr | pte_flags, intel_private.gtt + entry);
}

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static const struct aper_size_info_fixed intel_fake_agp_sizes[] = {
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	{32, 8192, 3},
	{64, 16384, 4},
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	{128, 32768, 5},
	{256, 65536, 6},
	{512, 131072, 7},
};

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static unsigned int intel_gtt_stolen_size(void)
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{
	u16 gmch_ctrl;
	u8 rdct;
	int local = 0;
	static const int ddt[4] = { 0, 16, 32, 64 };
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	unsigned int stolen_size = 0;
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	if (INTEL_GTT_GEN == 1)
		return 0; /* no stolen mem on i81x */

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	pci_read_config_word(intel_private.bridge_dev,
			     I830_GMCH_CTRL, &gmch_ctrl);
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	if (intel_private.bridge_dev->device == PCI_DEVICE_ID_INTEL_82830_HB ||
	    intel_private.bridge_dev->device == PCI_DEVICE_ID_INTEL_82845G_HB) {
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		switch (gmch_ctrl & I830_GMCH_GMS_MASK) {
		case I830_GMCH_GMS_STOLEN_512:
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			stolen_size = KB(512);
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			break;
		case I830_GMCH_GMS_STOLEN_1024:
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			stolen_size = MB(1);
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			break;
		case I830_GMCH_GMS_STOLEN_8192:
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			stolen_size = MB(8);
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			break;
		case I830_GMCH_GMS_LOCAL:
			rdct = readb(intel_private.registers+I830_RDRAM_CHANNEL_TYPE);
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			stolen_size = (I830_RDRAM_ND(rdct) + 1) *
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					MB(ddt[I830_RDRAM_DDT(rdct)]);
			local = 1;
			break;
		default:
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			stolen_size = 0;
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			break;
		}
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	} else if (INTEL_GTT_GEN == 6) {
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		/*
		 * SandyBridge has new memory control reg at 0x50.w
		 */
		u16 snb_gmch_ctl;
		pci_read_config_word(intel_private.pcidev, SNB_GMCH_CTRL, &snb_gmch_ctl);
		switch (snb_gmch_ctl & SNB_GMCH_GMS_STOLEN_MASK) {
		case SNB_GMCH_GMS_STOLEN_32M:
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			stolen_size = MB(32);
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			break;
		case SNB_GMCH_GMS_STOLEN_64M:
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			stolen_size = MB(64);
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			break;
		case SNB_GMCH_GMS_STOLEN_96M:
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			stolen_size = MB(96);
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			break;
		case SNB_GMCH_GMS_STOLEN_128M:
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			stolen_size = MB(128);
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			break;
		case SNB_GMCH_GMS_STOLEN_160M:
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			stolen_size = MB(160);
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			break;
		case SNB_GMCH_GMS_STOLEN_192M:
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			stolen_size = MB(192);
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			break;
		case SNB_GMCH_GMS_STOLEN_224M:
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			stolen_size = MB(224);
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			break;
		case SNB_GMCH_GMS_STOLEN_256M:
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			stolen_size = MB(256);
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			break;
		case SNB_GMCH_GMS_STOLEN_288M:
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			stolen_size = MB(288);
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			break;
		case SNB_GMCH_GMS_STOLEN_320M:
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			stolen_size = MB(320);
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			break;
		case SNB_GMCH_GMS_STOLEN_352M:
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			stolen_size = MB(352);
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			break;
		case SNB_GMCH_GMS_STOLEN_384M:
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			stolen_size = MB(384);
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			break;
		case SNB_GMCH_GMS_STOLEN_416M:
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			stolen_size = MB(416);
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			break;
		case SNB_GMCH_GMS_STOLEN_448M:
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			stolen_size = MB(448);
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			break;
		case SNB_GMCH_GMS_STOLEN_480M:
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			stolen_size = MB(480);
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			break;
		case SNB_GMCH_GMS_STOLEN_512M:
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			stolen_size = MB(512);
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			break;
		}
	} else {
		switch (gmch_ctrl & I855_GMCH_GMS_MASK) {
		case I855_GMCH_GMS_STOLEN_1M:
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			stolen_size = MB(1);
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			break;
		case I855_GMCH_GMS_STOLEN_4M:
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			stolen_size = MB(4);
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			break;
		case I855_GMCH_GMS_STOLEN_8M:
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			stolen_size = MB(8);
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			break;
		case I855_GMCH_GMS_STOLEN_16M:
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			stolen_size = MB(16);
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			break;
		case I855_GMCH_GMS_STOLEN_32M:
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			stolen_size = MB(32);
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			break;
		case I915_GMCH_GMS_STOLEN_48M:
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			stolen_size = MB(48);
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			break;
		case I915_GMCH_GMS_STOLEN_64M:
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			stolen_size = MB(64);
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			break;
		case G33_GMCH_GMS_STOLEN_128M:
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			stolen_size = MB(128);
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			break;
		case G33_GMCH_GMS_STOLEN_256M:
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			stolen_size = MB(256);
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			break;
		case INTEL_GMCH_GMS_STOLEN_96M:
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			stolen_size = MB(96);
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			break;
		case INTEL_GMCH_GMS_STOLEN_160M:
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			stolen_size = MB(160);
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			break;
		case INTEL_GMCH_GMS_STOLEN_224M:
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			stolen_size = MB(224);
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			break;
		case INTEL_GMCH_GMS_STOLEN_352M:
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			stolen_size = MB(352);
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			break;
		default:
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			stolen_size = 0;
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			break;
		}
	}
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	if (stolen_size > 0) {
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		dev_info(&intel_private.bridge_dev->dev, "detected %dK %s memory\n",
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		       stolen_size / KB(1), local ? "local" : "stolen");
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	} else {
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		dev_info(&intel_private.bridge_dev->dev,
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		       "no pre-allocated video memory detected\n");
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		stolen_size = 0;
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	}

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	return stolen_size;
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}

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static void i965_adjust_pgetbl_size(unsigned int size_flag)
{
	u32 pgetbl_ctl, pgetbl_ctl2;

	/* ensure that ppgtt is disabled */
	pgetbl_ctl2 = readl(intel_private.registers+I965_PGETBL_CTL2);
	pgetbl_ctl2 &= ~I810_PGETBL_ENABLED;
	writel(pgetbl_ctl2, intel_private.registers+I965_PGETBL_CTL2);

	/* write the new ggtt size */
	pgetbl_ctl = readl(intel_private.registers+I810_PGETBL_CTL);
	pgetbl_ctl &= ~I965_PGETBL_SIZE_MASK;
	pgetbl_ctl |= size_flag;
	writel(pgetbl_ctl, intel_private.registers+I810_PGETBL_CTL);
}

static unsigned int i965_gtt_total_entries(void)
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{
	int size;
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	u32 pgetbl_ctl;
	u16 gmch_ctl;
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	pci_read_config_word(intel_private.bridge_dev,
			     I830_GMCH_CTRL, &gmch_ctl);
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	if (INTEL_GTT_GEN == 5) {
		switch (gmch_ctl & G4x_GMCH_SIZE_MASK) {
		case G4x_GMCH_SIZE_1M:
		case G4x_GMCH_SIZE_VT_1M:
			i965_adjust_pgetbl_size(I965_PGETBL_SIZE_1MB);
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			break;
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		case G4x_GMCH_SIZE_VT_1_5M:
			i965_adjust_pgetbl_size(I965_PGETBL_SIZE_1_5MB);
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			break;
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		case G4x_GMCH_SIZE_2M:
		case G4x_GMCH_SIZE_VT_2M:
			i965_adjust_pgetbl_size(I965_PGETBL_SIZE_2MB);
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			break;
		}
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	}
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	pgetbl_ctl = readl(intel_private.registers+I810_PGETBL_CTL);

	switch (pgetbl_ctl & I965_PGETBL_SIZE_MASK) {
	case I965_PGETBL_SIZE_128KB:
		size = KB(128);
		break;
	case I965_PGETBL_SIZE_256KB:
		size = KB(256);
		break;
	case I965_PGETBL_SIZE_512KB:
		size = KB(512);
		break;
	/* GTT pagetable sizes bigger than 512KB are not possible on G33! */
	case I965_PGETBL_SIZE_1MB:
		size = KB(1024);
		break;
	case I965_PGETBL_SIZE_2MB:
		size = KB(2048);
		break;
	case I965_PGETBL_SIZE_1_5MB:
		size = KB(1024 + 512);
		break;
	default:
		dev_info(&intel_private.pcidev->dev,
			 "unknown page table size, assuming 512KB\n");
		size = KB(512);
	}

	return size/4;
}

static unsigned int intel_gtt_total_entries(void)
{
	int size;

	if (IS_G33 || INTEL_GTT_GEN == 4 || INTEL_GTT_GEN == 5)
		return i965_gtt_total_entries();
	else if (INTEL_GTT_GEN == 6) {
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		u16 snb_gmch_ctl;

		pci_read_config_word(intel_private.pcidev, SNB_GMCH_CTRL, &snb_gmch_ctl);
		switch (snb_gmch_ctl & SNB_GTT_SIZE_MASK) {
		default:
		case SNB_GTT_SIZE_0M:
			printk(KERN_ERR "Bad GTT size mask: 0x%04x.\n", snb_gmch_ctl);
			size = MB(0);
			break;
		case SNB_GTT_SIZE_1M:
			size = MB(1);
			break;
		case SNB_GTT_SIZE_2M:
			size = MB(2);
			break;
		}
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		return size/4;
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	} else {
		/* On previous hardware, the GTT size was just what was
		 * required to map the aperture.
		 */
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		return intel_private.base.gtt_mappable_entries;
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	}
}

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static unsigned int intel_gtt_mappable_entries(void)
{
	unsigned int aperture_size;

601 602 603 604 605 606 607 608 609 610 611 612
	if (INTEL_GTT_GEN == 1) {
		u32 smram_miscc;

		pci_read_config_dword(intel_private.bridge_dev,
				      I810_SMRAM_MISCC, &smram_miscc);

		if ((smram_miscc & I810_GFX_MEM_WIN_SIZE)
				== I810_GFX_MEM_WIN_32M)
			aperture_size = MB(32);
		else
			aperture_size = MB(64);
	} else if (INTEL_GTT_GEN == 2) {
613
		u16 gmch_ctrl;
614

615 616
		pci_read_config_word(intel_private.bridge_dev,
				     I830_GMCH_CTRL, &gmch_ctrl);
617 618

		if ((gmch_ctrl & I830_GMCH_MEM_MASK) == I830_GMCH_MEM_64M)
619
			aperture_size = MB(64);
620
		else
621
			aperture_size = MB(128);
622
	} else {
623 624 625 626 627 628 629
		/* 9xx supports large sizes, just look at the length */
		aperture_size = pci_resource_len(intel_private.pcidev, 2);
	}

	return aperture_size >> PAGE_SHIFT;
}

630 631 632
static void intel_gtt_teardown_scratch_page(void)
{
	set_pages_wb(intel_private.scratch_page, 1);
633
	pci_unmap_page(intel_private.pcidev, intel_private.base.scratch_page_dma,
634 635 636 637 638 639 640
		       PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
	put_page(intel_private.scratch_page);
	__free_page(intel_private.scratch_page);
}

static void intel_gtt_cleanup(void)
{
641 642
	intel_private.driver->cleanup();

643 644
	iounmap(intel_private.gtt);
	iounmap(intel_private.registers);
645

646 647 648
	intel_gtt_teardown_scratch_page();
}

649 650
static int intel_gtt_init(void)
{
651
	u32 gtt_map_size;
652 653 654 655 656
	int ret;

	ret = intel_private.driver->setup();
	if (ret != 0)
		return ret;
657 658 659 660

	intel_private.base.gtt_mappable_entries = intel_gtt_mappable_entries();
	intel_private.base.gtt_total_entries = intel_gtt_total_entries();

661 662 663 664
	/* save the PGETBL reg for resume */
	intel_private.PGETBL_save =
		readl(intel_private.registers+I810_PGETBL_CTL)
			& ~I810_PGETBL_ENABLED;
665 666 667
	/* we only ever restore the register when enabling the PGTBL... */
	if (HAS_PGTBL_EN)
		intel_private.PGETBL_save |= I810_PGETBL_ENABLED;
668

669 670 671 672 673
	dev_info(&intel_private.bridge_dev->dev,
			"detected gtt size: %dK total, %dK mappable\n",
			intel_private.base.gtt_total_entries * 4,
			intel_private.base.gtt_mappable_entries * 4);

674 675 676 677 678
	gtt_map_size = intel_private.base.gtt_total_entries * 4;

	intel_private.gtt = ioremap(intel_private.gtt_bus_addr,
				    gtt_map_size);
	if (!intel_private.gtt) {
679
		intel_private.driver->cleanup();
680 681 682 683 684 685
		iounmap(intel_private.registers);
		return -ENOMEM;
	}

	global_cache_flush();   /* FIXME: ? */

686
	intel_private.base.stolen_size = intel_gtt_stolen_size();
687

688 689
	intel_private.base.needs_dmar = USE_PCI_DMA_API && INTEL_GTT_GEN > 2;

690 691 692 693 694 695
	ret = intel_gtt_setup_scratch_page();
	if (ret != 0) {
		intel_gtt_cleanup();
		return ret;
	}

696 697 698
	return 0;
}

699 700
static int intel_fake_agp_fetch_size(void)
{
701
	int num_sizes = ARRAY_SIZE(intel_fake_agp_sizes);
702 703 704 705 706 707 708
	unsigned int aper_size;
	int i;

	aper_size = (intel_private.base.gtt_mappable_entries << PAGE_SHIFT)
		    / MB(1);

	for (i = 0; i < num_sizes; i++) {
709
		if (aper_size == intel_fake_agp_sizes[i].size) {
710 711
			agp_bridge->current_size =
				(void *) (intel_fake_agp_sizes + i);
712 713 714 715 716 717 718
			return aper_size;
		}
	}

	return 0;
}

719
static void i830_cleanup(void)
720 721 722 723 724 725 726 727 728 729 730 731 732
{
}

/* The chipset_flush interface needs to get data that has already been
 * flushed out of the CPU all the way out to main memory, because the GPU
 * doesn't snoop those buffers.
 *
 * The 8xx series doesn't have the same lovely interface for flushing the
 * chipset write buffers that the later chips do. According to the 865
 * specs, it's 64 octwords, or 1KB.  So, to get those previous things in
 * that buffer out, we just fill 1KB and clflush it out, on the assumption
 * that it'll push whatever was in there out.  It appears to work.
 */
733
static void i830_chipset_flush(void)
734
{
735 736 737 738 739 740 741 742 743 744 745 746 747 748
	unsigned long timeout = jiffies + msecs_to_jiffies(1000);

	/* Forcibly evict everything from the CPU write buffers.
	 * clflush appears to be insufficient.
	 */
	wbinvd_on_all_cpus();

	/* Now we've only seen documents for this magic bit on 855GM,
	 * we hope it exists for the other gen2 chipsets...
	 *
	 * Also works as advertised on my 845G.
	 */
	writel(readl(intel_private.registers+I830_HIC) | (1<<31),
	       intel_private.registers+I830_HIC);
749

750 751 752
	while (readl(intel_private.registers+I830_HIC) & (1<<31)) {
		if (time_after(jiffies, timeout))
			break;
753

754 755
		udelay(50);
	}
756 757
}

758 759 760 761
static void i830_write_entry(dma_addr_t addr, unsigned int entry,
			     unsigned int flags)
{
	u32 pte_flags = I810_PTE_VALID;
762

763
	if (flags ==  AGP_USER_CACHED_MEMORY)
764 765 766 767 768
		pte_flags |= I830_PTE_SYSTEM_CACHED;

	writel(addr | pte_flags, intel_private.gtt + entry);
}

769
static bool intel_enable_gtt(void)
770
{
771
	u32 gma_addr;
772
	u8 __iomem *reg;
773

774
	if (INTEL_GTT_GEN <= 2)
775 776 777 778 779 780
		pci_read_config_dword(intel_private.pcidev, I810_GMADDR,
				      &gma_addr);
	else
		pci_read_config_dword(intel_private.pcidev, I915_GMADDR,
				      &gma_addr);

781
	intel_private.gma_bus_addr = (gma_addr & PCI_BASE_ADDRESS_MEM_MASK);
782

783 784 785
	if (INTEL_GTT_GEN >= 6)
	    return true;

786 787
	if (INTEL_GTT_GEN == 2) {
		u16 gmch_ctrl;
788

789 790 791 792 793 794 795 796 797 798 799 800 801 802
		pci_read_config_word(intel_private.bridge_dev,
				     I830_GMCH_CTRL, &gmch_ctrl);
		gmch_ctrl |= I830_GMCH_ENABLED;
		pci_write_config_word(intel_private.bridge_dev,
				      I830_GMCH_CTRL, gmch_ctrl);

		pci_read_config_word(intel_private.bridge_dev,
				     I830_GMCH_CTRL, &gmch_ctrl);
		if ((gmch_ctrl & I830_GMCH_ENABLED) == 0) {
			dev_err(&intel_private.pcidev->dev,
				"failed to enable the GTT: GMCH_CTRL=%x\n",
				gmch_ctrl);
			return false;
		}
803 804
	}

805 806 807 808 809 810
	/* On the resume path we may be adjusting the PGTBL value, so
	 * be paranoid and flush all chipset write buffers...
	 */
	if (INTEL_GTT_GEN >= 3)
		writel(0, intel_private.registers+GFX_FLSH_CNTL);

811
	reg = intel_private.registers+I810_PGETBL_CTL;
812 813
	writel(intel_private.PGETBL_save, reg);
	if (HAS_PGTBL_EN && (readl(reg) & I810_PGETBL_ENABLED) == 0) {
814
		dev_err(&intel_private.pcidev->dev,
815
			"failed to enable the GTT: PGETBL=%x [expected %x]\n",
816 817 818 819
			readl(reg), intel_private.PGETBL_save);
		return false;
	}

820 821 822
	if (INTEL_GTT_GEN >= 3)
		writel(0, intel_private.registers+GFX_FLSH_CNTL);

823
	return true;
824 825 826 827 828 829 830 831 832 833
}

static int i830_setup(void)
{
	u32 reg_addr;

	pci_read_config_dword(intel_private.pcidev, I810_MMADDR, &reg_addr);
	reg_addr &= 0xfff80000;

	intel_private.registers = ioremap(reg_addr, KB(64));
834 835 836
	if (!intel_private.registers)
		return -ENOMEM;

837 838 839 840 841
	intel_private.gtt_bus_addr = reg_addr + I810_PTE_BASE;

	return 0;
}

842
static int intel_fake_agp_create_gatt_table(struct agp_bridge_data *bridge)
843 844
{
	agp_bridge->gatt_table_real = NULL;
845
	agp_bridge->gatt_table = NULL;
846
	agp_bridge->gatt_bus_addr = 0;
847 848 849 850

	return 0;
}

851
static int intel_fake_agp_free_gatt_table(struct agp_bridge_data *bridge)
852 853 854 855
{
	return 0;
}

856
static int intel_fake_agp_configure(void)
857
{
858 859
	if (!intel_enable_gtt())
	    return -EIO;
860

861
	intel_private.clear_fake_agp = true;
862
	agp_bridge->gart_bus_addr = intel_private.gma_bus_addr;
863 864 865 866

	return 0;
}

867
static bool i830_check_flags(unsigned int flags)
868
{
869 870 871 872 873 874 875 876 877 878 879
	switch (flags) {
	case 0:
	case AGP_PHYS_MEMORY:
	case AGP_USER_CACHED_MEMORY:
	case AGP_USER_MEMORY:
		return true;
	}

	return false;
}

D
Daniel Vetter 已提交
880 881 882 883
void intel_gtt_insert_sg_entries(struct scatterlist *sg_list,
				 unsigned int sg_len,
				 unsigned int pg_start,
				 unsigned int flags)
884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903
{
	struct scatterlist *sg;
	unsigned int len, m;
	int i, j;

	j = pg_start;

	/* sg may merge pages, but we have to separate
	 * per-page addr for GTT */
	for_each_sg(sg_list, sg, sg_len, i) {
		len = sg_dma_len(sg) >> PAGE_SHIFT;
		for (m = 0; m < len; m++) {
			dma_addr_t addr = sg_dma_address(sg) + (m << PAGE_SHIFT);
			intel_private.driver->write_entry(addr,
							  j, flags);
			j++;
		}
	}
	readl(intel_private.gtt+j-1);
}
D
Daniel Vetter 已提交
904 905 906 907 908 909 910 911 912 913 914 915 916 917 918
EXPORT_SYMBOL(intel_gtt_insert_sg_entries);

void intel_gtt_insert_pages(unsigned int first_entry, unsigned int num_entries,
			    struct page **pages, unsigned int flags)
{
	int i, j;

	for (i = 0, j = first_entry; i < num_entries; i++, j++) {
		dma_addr_t addr = page_to_phys(pages[i]);
		intel_private.driver->write_entry(addr,
						  j, flags);
	}
	readl(intel_private.gtt+j-1);
}
EXPORT_SYMBOL(intel_gtt_insert_pages);
919

920 921 922
static int intel_fake_agp_insert_entries(struct agp_memory *mem,
					 off_t pg_start, int type)
{
923 924
	int ret = -EINVAL;

B
Ben Widawsky 已提交
925 926 927
	if (intel_private.base.do_idle_maps)
		return -ENODEV;

928 929 930 931 932 933 934
	if (intel_private.clear_fake_agp) {
		int start = intel_private.base.stolen_size / PAGE_SIZE;
		int end = intel_private.base.gtt_mappable_entries;
		intel_gtt_clear_range(start, end - start);
		intel_private.clear_fake_agp = false;
	}

935 936 937
	if (INTEL_GTT_GEN == 1 && type == AGP_DCACHE_MEMORY)
		return i810_insert_dcache_entries(mem, pg_start, type);

938 939 940
	if (mem->page_count == 0)
		goto out;

941
	if (pg_start + mem->page_count > intel_private.base.gtt_total_entries)
942 943 944 945 946
		goto out_err;

	if (type != mem->type)
		goto out_err;

947
	if (!intel_private.driver->check_flags(type))
948 949 950 951 952
		goto out_err;

	if (!mem->is_flushed)
		global_cache_flush();

D
Daniel Vetter 已提交
953 954 955
	if (intel_private.base.needs_dmar) {
		ret = intel_gtt_map_memory(mem->pages, mem->page_count,
					   &mem->sg_list, &mem->num_sg);
956 957 958 959 960
		if (ret != 0)
			return ret;

		intel_gtt_insert_sg_entries(mem->sg_list, mem->num_sg,
					    pg_start, type);
D
Daniel Vetter 已提交
961 962 963
	} else
		intel_gtt_insert_pages(pg_start, mem->page_count, mem->pages,
				       type);
964 965 966 967 968 969 970 971

out:
	ret = 0;
out_err:
	mem->is_flushed = true;
	return ret;
}

D
Daniel Vetter 已提交
972 973 974 975 976
void intel_gtt_clear_range(unsigned int first_entry, unsigned int num_entries)
{
	unsigned int i;

	for (i = first_entry; i < (first_entry + num_entries); i++) {
977
		intel_private.driver->write_entry(intel_private.base.scratch_page_dma,
D
Daniel Vetter 已提交
978 979 980 981 982 983
						  i, 0);
	}
	readl(intel_private.gtt+i-1);
}
EXPORT_SYMBOL(intel_gtt_clear_range);

984 985
static int intel_fake_agp_remove_entries(struct agp_memory *mem,
					 off_t pg_start, int type)
986 987 988 989
{
	if (mem->page_count == 0)
		return 0;

B
Ben Widawsky 已提交
990 991 992
	if (intel_private.base.do_idle_maps)
		return -ENODEV;

993 994
	intel_gtt_clear_range(pg_start, mem->page_count);

D
Daniel Vetter 已提交
995 996 997 998
	if (intel_private.base.needs_dmar) {
		intel_gtt_unmap_memory(mem->sg_list, mem->num_sg);
		mem->sg_list = NULL;
		mem->num_sg = 0;
999
	}
D
Daniel Vetter 已提交
1000

1001 1002 1003
	return 0;
}

1004 1005
static struct agp_memory *intel_fake_agp_alloc_by_type(size_t pg_count,
						       int type)
1006
{
1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022
	struct agp_memory *new;

	if (type == AGP_DCACHE_MEMORY && INTEL_GTT_GEN == 1) {
		if (pg_count != intel_private.num_dcache_entries)
			return NULL;

		new = agp_create_memory(1);
		if (new == NULL)
			return NULL;

		new->type = AGP_DCACHE_MEMORY;
		new->page_count = pg_count;
		new->num_scratch_pages = 0;
		agp_free_page_array(new);
		return new;
	}
1023 1024 1025 1026 1027 1028 1029 1030 1031
	if (type == AGP_PHYS_MEMORY)
		return alloc_agpphysmem_i8xx(pg_count, type);
	/* always return NULL for other allocation types for now */
	return NULL;
}

static int intel_alloc_chipset_flush_resource(void)
{
	int ret;
1032
	ret = pci_bus_alloc_resource(intel_private.bridge_dev->bus, &intel_private.ifp_resource, PAGE_SIZE,
1033
				     PAGE_SIZE, PCIBIOS_MIN_MEM, 0,
1034
				     pcibios_align_resource, intel_private.bridge_dev);
1035 1036 1037 1038 1039 1040 1041 1042 1043

	return ret;
}

static void intel_i915_setup_chipset_flush(void)
{
	int ret;
	u32 temp;

1044
	pci_read_config_dword(intel_private.bridge_dev, I915_IFPADDR, &temp);
1045 1046 1047
	if (!(temp & 0x1)) {
		intel_alloc_chipset_flush_resource();
		intel_private.resource_valid = 1;
1048
		pci_write_config_dword(intel_private.bridge_dev, I915_IFPADDR, (intel_private.ifp_resource.start & 0xffffffff) | 0x1);
1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066
	} else {
		temp &= ~1;

		intel_private.resource_valid = 1;
		intel_private.ifp_resource.start = temp;
		intel_private.ifp_resource.end = temp + PAGE_SIZE;
		ret = request_resource(&iomem_resource, &intel_private.ifp_resource);
		/* some BIOSes reserve this area in a pnp some don't */
		if (ret)
			intel_private.resource_valid = 0;
	}
}

static void intel_i965_g33_setup_chipset_flush(void)
{
	u32 temp_hi, temp_lo;
	int ret;

1067 1068
	pci_read_config_dword(intel_private.bridge_dev, I965_IFPADDR + 4, &temp_hi);
	pci_read_config_dword(intel_private.bridge_dev, I965_IFPADDR, &temp_lo);
1069 1070 1071 1072 1073 1074

	if (!(temp_lo & 0x1)) {

		intel_alloc_chipset_flush_resource();

		intel_private.resource_valid = 1;
1075
		pci_write_config_dword(intel_private.bridge_dev, I965_IFPADDR + 4,
1076
			upper_32_bits(intel_private.ifp_resource.start));
1077
		pci_write_config_dword(intel_private.bridge_dev, I965_IFPADDR, (intel_private.ifp_resource.start & 0xffffffff) | 0x1);
1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099
	} else {
		u64 l64;

		temp_lo &= ~0x1;
		l64 = ((u64)temp_hi << 32) | temp_lo;

		intel_private.resource_valid = 1;
		intel_private.ifp_resource.start = l64;
		intel_private.ifp_resource.end = l64 + PAGE_SIZE;
		ret = request_resource(&iomem_resource, &intel_private.ifp_resource);
		/* some BIOSes reserve this area in a pnp some don't */
		if (ret)
			intel_private.resource_valid = 0;
	}
}

static void intel_i9xx_setup_flush(void)
{
	/* return if already configured */
	if (intel_private.ifp_resource.start)
		return;

1100
	if (INTEL_GTT_GEN == 6)
1101 1102 1103 1104 1105 1106 1107
		return;

	/* setup a resource for this object */
	intel_private.ifp_resource.name = "Intel Flush Page";
	intel_private.ifp_resource.flags = IORESOURCE_MEM;

	/* Setup chipset flush for 915 */
1108
	if (IS_G33 || INTEL_GTT_GEN >= 4) {
1109 1110 1111 1112 1113
		intel_i965_g33_setup_chipset_flush();
	} else {
		intel_i915_setup_chipset_flush();
	}

1114
	if (intel_private.ifp_resource.start)
1115
		intel_private.i9xx_flush_page = ioremap_nocache(intel_private.ifp_resource.start, PAGE_SIZE);
1116 1117 1118
	if (!intel_private.i9xx_flush_page)
		dev_err(&intel_private.pcidev->dev,
			"can't ioremap flush page - no chipset flushing\n");
1119 1120
}

1121 1122 1123 1124 1125 1126 1127 1128 1129 1130
static void i9xx_cleanup(void)
{
	if (intel_private.i9xx_flush_page)
		iounmap(intel_private.i9xx_flush_page);
	if (intel_private.resource_valid)
		release_resource(&intel_private.ifp_resource);
	intel_private.ifp_resource.start = 0;
	intel_private.resource_valid = 0;
}

1131
static void i9xx_chipset_flush(void)
1132 1133 1134 1135 1136
{
	if (intel_private.i9xx_flush_page)
		writel(1, intel_private.i9xx_flush_page);
}

1137 1138
static void i965_write_entry(dma_addr_t addr,
			     unsigned int entry,
1139 1140
			     unsigned int flags)
{
1141 1142 1143 1144 1145 1146
	u32 pte_flags;

	pte_flags = I810_PTE_VALID;
	if (flags == AGP_USER_CACHED_MEMORY)
		pte_flags |= I830_PTE_SYSTEM_CACHED;

1147 1148
	/* Shift high bits down */
	addr |= (addr >> 28) & 0xf0;
1149
	writel(addr | pte_flags, intel_private.gtt + entry);
1150 1151
}

1152 1153 1154 1155 1156
static bool gen6_check_flags(unsigned int flags)
{
	return true;
}

1157 1158 1159 1160 1161 1162 1163
static void gen6_write_entry(dma_addr_t addr, unsigned int entry,
			     unsigned int flags)
{
	unsigned int type_mask = flags & ~AGP_USER_CACHED_MEMORY_GFDT;
	unsigned int gfdt = flags & AGP_USER_CACHED_MEMORY_GFDT;
	u32 pte_flags;

1164
	if (type_mask == AGP_USER_MEMORY)
1165
		pte_flags = GEN6_PTE_UNCACHED | I810_PTE_VALID;
1166
	else if (type_mask == AGP_USER_CACHED_MEMORY_LLC_MLC) {
1167
		pte_flags = GEN6_PTE_LLC_MLC | I810_PTE_VALID;
1168 1169 1170
		if (gfdt)
			pte_flags |= GEN6_PTE_GFDT;
	} else { /* set 'normal'/'cached' to LLC by default */
1171
		pte_flags = GEN6_PTE_LLC | I810_PTE_VALID;
1172 1173 1174 1175 1176 1177 1178 1179 1180
		if (gfdt)
			pte_flags |= GEN6_PTE_GFDT;
	}

	/* gen6 has bit11-4 for physical addr bit39-32 */
	addr |= (addr >> 28) & 0xff0;
	writel(addr | pte_flags, intel_private.gtt + entry);
}

1181 1182 1183 1184
static void gen6_cleanup(void)
{
}

B
Ben Widawsky 已提交
1185 1186 1187 1188 1189
/* Certain Gen5 chipsets require require idling the GPU before
 * unmapping anything from the GTT when VT-d is enabled.
 */
static inline int needs_idle_maps(void)
{
1190
#ifdef CONFIG_INTEL_IOMMU
B
Ben Widawsky 已提交
1191
	const unsigned short gpu_devid = intel_private.pcidev->device;
1192
	extern int intel_iommu_gfx_mapped;
B
Ben Widawsky 已提交
1193 1194 1195 1196 1197 1198 1199 1200

	/* Query intel_iommu to see if we need the workaround. Presumably that
	 * was loaded first.
	 */
	if ((gpu_devid == PCI_DEVICE_ID_INTEL_IRONLAKE_M_HB ||
	     gpu_devid == PCI_DEVICE_ID_INTEL_IRONLAKE_M_IG) &&
	     intel_iommu_gfx_mapped)
		return 1;
1201
#endif
B
Ben Widawsky 已提交
1202 1203 1204
	return 0;
}

1205
static int i9xx_setup(void)
1206
{
1207
	u32 reg_addr;
1208

1209
	pci_read_config_dword(intel_private.pcidev, I915_MMADDR, &reg_addr);
1210

1211
	reg_addr &= 0xfff80000;
1212

1213
	intel_private.registers = ioremap(reg_addr, 128 * 4096);
1214
	if (!intel_private.registers)
1215 1216
		return -ENOMEM;

1217 1218
	if (INTEL_GTT_GEN == 3) {
		u32 gtt_addr;
1219

1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238
		pci_read_config_dword(intel_private.pcidev,
				      I915_PTEADDR, &gtt_addr);
		intel_private.gtt_bus_addr = gtt_addr;
	} else {
		u32 gtt_offset;

		switch (INTEL_GTT_GEN) {
		case 5:
		case 6:
			gtt_offset = MB(2);
			break;
		case 4:
		default:
			gtt_offset =  KB(512);
			break;
		}
		intel_private.gtt_bus_addr = reg_addr + gtt_offset;
	}

1239
	if (needs_idle_maps())
B
Ben Widawsky 已提交
1240 1241
		intel_private.base.do_idle_maps = 1;

1242 1243 1244 1245 1246
	intel_i9xx_setup_flush();

	return 0;
}

1247
static const struct agp_bridge_driver intel_fake_agp_driver = {
1248 1249
	.owner			= THIS_MODULE,
	.size_type		= FIXED_APER_SIZE,
1250 1251
	.aperture_sizes		= intel_fake_agp_sizes,
	.num_aperture_sizes	= ARRAY_SIZE(intel_fake_agp_sizes),
1252
	.configure		= intel_fake_agp_configure,
1253
	.fetch_size		= intel_fake_agp_fetch_size,
1254
	.cleanup		= intel_gtt_cleanup,
1255
	.agp_enable		= intel_fake_agp_enable,
1256
	.cache_flush		= global_cache_flush,
1257
	.create_gatt_table	= intel_fake_agp_create_gatt_table,
1258
	.free_gatt_table	= intel_fake_agp_free_gatt_table,
1259 1260
	.insert_memory		= intel_fake_agp_insert_entries,
	.remove_memory		= intel_fake_agp_remove_entries,
1261
	.alloc_by_type		= intel_fake_agp_alloc_by_type,
1262 1263 1264 1265 1266 1267
	.free_by_type		= intel_i810_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,
};
1268

1269 1270
static const struct intel_gtt_driver i81x_gtt_driver = {
	.gen = 1,
1271
	.has_pgtbl_enable = 1,
1272
	.dma_mask_size = 32,
1273 1274
	.setup = i810_setup,
	.cleanup = i810_cleanup,
1275 1276
	.check_flags = i830_check_flags,
	.write_entry = i810_write_entry,
1277
};
1278 1279
static const struct intel_gtt_driver i8xx_gtt_driver = {
	.gen = 2,
1280
	.has_pgtbl_enable = 1,
1281
	.setup = i830_setup,
1282
	.cleanup = i830_cleanup,
1283
	.write_entry = i830_write_entry,
1284
	.dma_mask_size = 32,
1285
	.check_flags = i830_check_flags,
1286
	.chipset_flush = i830_chipset_flush,
1287 1288 1289
};
static const struct intel_gtt_driver i915_gtt_driver = {
	.gen = 3,
1290
	.has_pgtbl_enable = 1,
1291
	.setup = i9xx_setup,
1292
	.cleanup = i9xx_cleanup,
1293
	/* i945 is the last gpu to need phys mem (for overlay and cursors). */
1294
	.write_entry = i830_write_entry,
1295
	.dma_mask_size = 32,
1296
	.check_flags = i830_check_flags,
1297
	.chipset_flush = i9xx_chipset_flush,
1298 1299 1300 1301
};
static const struct intel_gtt_driver g33_gtt_driver = {
	.gen = 3,
	.is_g33 = 1,
1302
	.setup = i9xx_setup,
1303
	.cleanup = i9xx_cleanup,
1304
	.write_entry = i965_write_entry,
1305
	.dma_mask_size = 36,
1306
	.check_flags = i830_check_flags,
1307
	.chipset_flush = i9xx_chipset_flush,
1308 1309 1310 1311
};
static const struct intel_gtt_driver pineview_gtt_driver = {
	.gen = 3,
	.is_pineview = 1, .is_g33 = 1,
1312
	.setup = i9xx_setup,
1313
	.cleanup = i9xx_cleanup,
1314
	.write_entry = i965_write_entry,
1315
	.dma_mask_size = 36,
1316
	.check_flags = i830_check_flags,
1317
	.chipset_flush = i9xx_chipset_flush,
1318 1319 1320
};
static const struct intel_gtt_driver i965_gtt_driver = {
	.gen = 4,
1321
	.has_pgtbl_enable = 1,
1322
	.setup = i9xx_setup,
1323
	.cleanup = i9xx_cleanup,
1324
	.write_entry = i965_write_entry,
1325
	.dma_mask_size = 36,
1326
	.check_flags = i830_check_flags,
1327
	.chipset_flush = i9xx_chipset_flush,
1328 1329 1330
};
static const struct intel_gtt_driver g4x_gtt_driver = {
	.gen = 5,
1331
	.setup = i9xx_setup,
1332
	.cleanup = i9xx_cleanup,
1333
	.write_entry = i965_write_entry,
1334
	.dma_mask_size = 36,
1335
	.check_flags = i830_check_flags,
1336
	.chipset_flush = i9xx_chipset_flush,
1337 1338 1339 1340
};
static const struct intel_gtt_driver ironlake_gtt_driver = {
	.gen = 5,
	.is_ironlake = 1,
1341
	.setup = i9xx_setup,
1342
	.cleanup = i9xx_cleanup,
1343
	.write_entry = i965_write_entry,
1344
	.dma_mask_size = 36,
1345
	.check_flags = i830_check_flags,
1346
	.chipset_flush = i9xx_chipset_flush,
1347 1348 1349
};
static const struct intel_gtt_driver sandybridge_gtt_driver = {
	.gen = 6,
1350
	.setup = i9xx_setup,
1351
	.cleanup = gen6_cleanup,
1352
	.write_entry = gen6_write_entry,
1353
	.dma_mask_size = 40,
1354
	.check_flags = gen6_check_flags,
1355
	.chipset_flush = i9xx_chipset_flush,
1356 1357
};

1358 1359 1360 1361 1362 1363 1364
/* 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_gtt_driver_description {
	unsigned int gmch_chip_id;
	char *name;
1365
	const struct intel_gtt_driver *gtt_driver;
1366
} intel_gtt_chipsets[] = {
1367
	{ PCI_DEVICE_ID_INTEL_82810_IG1, "i810",
1368
		&i81x_gtt_driver},
1369
	{ PCI_DEVICE_ID_INTEL_82810_IG3, "i810",
1370
		&i81x_gtt_driver},
1371
	{ PCI_DEVICE_ID_INTEL_82810E_IG, "i810",
1372
		&i81x_gtt_driver},
1373
	{ PCI_DEVICE_ID_INTEL_82815_CGC, "i815",
1374
		&i81x_gtt_driver},
1375
	{ PCI_DEVICE_ID_INTEL_82830_CGC, "830M",
1376
		&i8xx_gtt_driver},
1377
	{ PCI_DEVICE_ID_INTEL_82845G_IG, "845G",
1378
		&i8xx_gtt_driver},
1379
	{ PCI_DEVICE_ID_INTEL_82854_IG, "854",
1380
		&i8xx_gtt_driver},
1381
	{ PCI_DEVICE_ID_INTEL_82855GM_IG, "855GM",
1382
		&i8xx_gtt_driver},
1383
	{ PCI_DEVICE_ID_INTEL_82865_IG, "865",
1384
		&i8xx_gtt_driver},
1385
	{ PCI_DEVICE_ID_INTEL_E7221_IG, "E7221 (i915)",
1386
		&i915_gtt_driver },
1387
	{ PCI_DEVICE_ID_INTEL_82915G_IG, "915G",
1388
		&i915_gtt_driver },
1389
	{ PCI_DEVICE_ID_INTEL_82915GM_IG, "915GM",
1390
		&i915_gtt_driver },
1391
	{ PCI_DEVICE_ID_INTEL_82945G_IG, "945G",
1392
		&i915_gtt_driver },
1393
	{ PCI_DEVICE_ID_INTEL_82945GM_IG, "945GM",
1394
		&i915_gtt_driver },
1395
	{ PCI_DEVICE_ID_INTEL_82945GME_IG, "945GME",
1396
		&i915_gtt_driver },
1397
	{ PCI_DEVICE_ID_INTEL_82946GZ_IG, "946GZ",
1398
		&i965_gtt_driver },
1399
	{ PCI_DEVICE_ID_INTEL_82G35_IG, "G35",
1400
		&i965_gtt_driver },
1401
	{ PCI_DEVICE_ID_INTEL_82965Q_IG, "965Q",
1402
		&i965_gtt_driver },
1403
	{ PCI_DEVICE_ID_INTEL_82965G_IG, "965G",
1404
		&i965_gtt_driver },
1405
	{ PCI_DEVICE_ID_INTEL_82965GM_IG, "965GM",
1406
		&i965_gtt_driver },
1407
	{ PCI_DEVICE_ID_INTEL_82965GME_IG, "965GME/GLE",
1408
		&i965_gtt_driver },
1409
	{ PCI_DEVICE_ID_INTEL_G33_IG, "G33",
1410
		&g33_gtt_driver },
1411
	{ PCI_DEVICE_ID_INTEL_Q35_IG, "Q35",
1412
		&g33_gtt_driver },
1413
	{ PCI_DEVICE_ID_INTEL_Q33_IG, "Q33",
1414
		&g33_gtt_driver },
1415
	{ PCI_DEVICE_ID_INTEL_PINEVIEW_M_IG, "GMA3150",
1416
		&pineview_gtt_driver },
1417
	{ PCI_DEVICE_ID_INTEL_PINEVIEW_IG, "GMA3150",
1418
		&pineview_gtt_driver },
1419
	{ PCI_DEVICE_ID_INTEL_GM45_IG, "GM45",
1420
		&g4x_gtt_driver },
1421
	{ PCI_DEVICE_ID_INTEL_EAGLELAKE_IG, "Eaglelake",
1422
		&g4x_gtt_driver },
1423
	{ PCI_DEVICE_ID_INTEL_Q45_IG, "Q45/Q43",
1424
		&g4x_gtt_driver },
1425
	{ PCI_DEVICE_ID_INTEL_G45_IG, "G45/G43",
1426
		&g4x_gtt_driver },
1427
	{ PCI_DEVICE_ID_INTEL_B43_IG, "B43",
1428
		&g4x_gtt_driver },
1429
	{ PCI_DEVICE_ID_INTEL_B43_1_IG, "B43",
1430
		&g4x_gtt_driver },
1431
	{ PCI_DEVICE_ID_INTEL_G41_IG, "G41",
1432
		&g4x_gtt_driver },
1433
	{ PCI_DEVICE_ID_INTEL_IRONLAKE_D_IG,
1434
	    "HD Graphics", &ironlake_gtt_driver },
1435
	{ PCI_DEVICE_ID_INTEL_IRONLAKE_M_IG,
1436
	    "HD Graphics", &ironlake_gtt_driver },
1437
	{ PCI_DEVICE_ID_INTEL_SANDYBRIDGE_GT1_IG,
1438
	    "Sandybridge", &sandybridge_gtt_driver },
1439
	{ PCI_DEVICE_ID_INTEL_SANDYBRIDGE_GT2_IG,
1440
	    "Sandybridge", &sandybridge_gtt_driver },
1441
	{ PCI_DEVICE_ID_INTEL_SANDYBRIDGE_GT2_PLUS_IG,
1442
	    "Sandybridge", &sandybridge_gtt_driver },
1443
	{ PCI_DEVICE_ID_INTEL_SANDYBRIDGE_M_GT1_IG,
1444
	    "Sandybridge", &sandybridge_gtt_driver },
1445
	{ PCI_DEVICE_ID_INTEL_SANDYBRIDGE_M_GT2_IG,
1446
	    "Sandybridge", &sandybridge_gtt_driver },
1447
	{ PCI_DEVICE_ID_INTEL_SANDYBRIDGE_M_GT2_PLUS_IG,
1448
	    "Sandybridge", &sandybridge_gtt_driver },
1449
	{ PCI_DEVICE_ID_INTEL_SANDYBRIDGE_S_IG,
1450
	    "Sandybridge", &sandybridge_gtt_driver },
J
Jesse Barnes 已提交
1451 1452 1453 1454 1455 1456 1457 1458 1459 1460
	{ PCI_DEVICE_ID_INTEL_IVYBRIDGE_GT1_IG,
	    "Ivybridge", &sandybridge_gtt_driver },
	{ PCI_DEVICE_ID_INTEL_IVYBRIDGE_GT2_IG,
	    "Ivybridge", &sandybridge_gtt_driver },
	{ PCI_DEVICE_ID_INTEL_IVYBRIDGE_M_GT1_IG,
	    "Ivybridge", &sandybridge_gtt_driver },
	{ PCI_DEVICE_ID_INTEL_IVYBRIDGE_M_GT2_IG,
	    "Ivybridge", &sandybridge_gtt_driver },
	{ PCI_DEVICE_ID_INTEL_IVYBRIDGE_S_GT1_IG,
	    "Ivybridge", &sandybridge_gtt_driver },
1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480
	{ 0, NULL, NULL }
};

static int find_gmch(u16 device)
{
	struct pci_dev *gmch_device;

	gmch_device = pci_get_device(PCI_VENDOR_ID_INTEL, device, NULL);
	if (gmch_device && PCI_FUNC(gmch_device->devfn) != 0) {
		gmch_device = pci_get_device(PCI_VENDOR_ID_INTEL,
					     device, gmch_device);
	}

	if (!gmch_device)
		return 0;

	intel_private.pcidev = gmch_device;
	return 1;
}

1481
int intel_gmch_probe(struct pci_dev *pdev,
1482 1483 1484
				      struct agp_bridge_data *bridge)
{
	int i, mask;
1485
	intel_private.driver = NULL;
1486 1487 1488

	for (i = 0; intel_gtt_chipsets[i].name != NULL; i++) {
		if (find_gmch(intel_gtt_chipsets[i].gmch_chip_id)) {
1489
			intel_private.driver =
1490
				intel_gtt_chipsets[i].gtt_driver;
1491 1492 1493 1494
			break;
		}
	}

1495
	if (!intel_private.driver)
1496 1497
		return 0;

1498
	bridge->driver = &intel_fake_agp_driver;
1499 1500 1501
	bridge->dev_private_data = &intel_private;
	bridge->dev = pdev;

1502 1503
	intel_private.bridge_dev = pci_dev_get(pdev);

1504 1505
	dev_info(&pdev->dev, "Intel %s Chipset\n", intel_gtt_chipsets[i].name);

1506
	mask = intel_private.driver->dma_mask_size;
1507 1508 1509 1510 1511 1512 1513
	if (pci_set_dma_mask(intel_private.pcidev, DMA_BIT_MASK(mask)))
		dev_err(&intel_private.pcidev->dev,
			"set gfx device dma mask %d-bit failed!\n", mask);
	else
		pci_set_consistent_dma_mask(intel_private.pcidev,
					    DMA_BIT_MASK(mask));

1514 1515
	/*if (bridge->driver == &intel_810_driver)
		return 1;*/
1516

1517 1518
	if (intel_gtt_init() != 0)
		return 0;
1519

1520 1521
	return 1;
}
1522
EXPORT_SYMBOL(intel_gmch_probe);
1523

1524
const struct intel_gtt *intel_gtt_get(void)
1525 1526 1527 1528 1529
{
	return &intel_private.base;
}
EXPORT_SYMBOL(intel_gtt_get);

1530 1531 1532 1533 1534 1535 1536
void intel_gtt_chipset_flush(void)
{
	if (intel_private.driver->chipset_flush)
		intel_private.driver->chipset_flush();
}
EXPORT_SYMBOL(intel_gtt_chipset_flush);

1537
void intel_gmch_remove(struct pci_dev *pdev)
1538 1539 1540
{
	if (intel_private.pcidev)
		pci_dev_put(intel_private.pcidev);
1541 1542
	if (intel_private.bridge_dev)
		pci_dev_put(intel_private.bridge_dev);
1543
}
1544 1545 1546 1547
EXPORT_SYMBOL(intel_gmch_remove);

MODULE_AUTHOR("Dave Jones <davej@redhat.com>");
MODULE_LICENSE("GPL and additional rights");