KolibriOS/kolibrios
13
4
Fork 12
Code Issues 78 Pull Requests 5 Projects Releases Activity
e5d0784a42
kolibrios/drivers/video/drm/i915/Gtt/intel-gtt.c
Sergey Semyonov (Serge) e5d0784a42 setup chip 
git-svn-id: svn://kolibrios.org@2326 a494cfbc-eb01-0410-851d-a64ba20cac60
2011-12-19 18:13:14 +00:00

769 lines
22 KiB
C
Raw Blame History

/*
* 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
*/
#include <linux/module.h>
#include <errno-base.h>
#include <linux/pci.h>
#include <linux/kernel.h>
//#include <linux/pagemap.h>
//#include <linux/agp_backend.h>
//#include <asm/smp.h>
#include <linux/spinlock.h>
#include "agp.h"
#include "intel-agp.h"
#include "intel-gtt.h"
#include <syscall.h>
struct pci_dev *
pci_get_device(unsigned int vendor, unsigned int device, struct pci_dev *from);
static bool intel_enable_gtt(void);
#define PCI_VENDOR_ID_INTEL 0x8086
#define PCI_DEVICE_ID_INTEL_82830_HB 0x3575
#define PCI_DEVICE_ID_INTEL_82845G_HB 0x2560
#define AGP_NORMAL_MEMORY 0
#define AGP_USER_TYPES (1 << 16)
#define AGP_USER_MEMORY (AGP_USER_TYPES)
#define AGP_USER_CACHED_MEMORY (AGP_USER_TYPES + 1)
static inline int pci_read_config_word(struct pci_dev *dev, int where,
u16 *val)
{
*val = PciRead16(dev->busnr, dev->devfn, where);
return 1;
}
static inline int pci_read_config_dword(struct pci_dev *dev, int where,
u32 *val)
{
*val = PciRead32(dev->busnr, dev->devfn, where);
return 1;
}
static inline int pci_write_config_word(struct pci_dev *dev, int where,
u16 val)
{
PciWrite16(dev->busnr, dev->devfn, where, val);
return 1;
}
/*
* 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
* on the Intel IOMMU support (CONFIG_DMAR).
* Only newer chipsets need to bother with this, of course.
*/
#ifdef CONFIG_DMAR
#define USE_PCI_DMA_API 1
#else
#define USE_PCI_DMA_API 0
#endif
struct intel_gtt_driver {
unsigned int gen : 8;
unsigned int is_g33 : 1;
unsigned int is_pineview : 1;
unsigned int is_ironlake : 1;
unsigned int has_pgtbl_enable : 1;
unsigned int dma_mask_size : 8;
/* Chipset specific GTT setup */
int (*setup)(void);
/* 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);
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! */
bool (*check_flags)(unsigned int flags);
void (*chipset_flush)(void);
};
static struct _intel_private {
struct intel_gtt base;
const struct intel_gtt_driver *driver;
struct pci_dev *pcidev; /* device one */
struct pci_dev *bridge_dev;
u8 __iomem *registers;
phys_addr_t gtt_bus_addr;
phys_addr_t gma_bus_addr;
u32 PGETBL_save;
u32 __iomem *gtt; /* I915G */
bool clear_fake_agp; /* on first access via agp, fill with scratch */
int num_dcache_entries;
void __iomem *i9xx_flush_page;
char *i81x_gtt_table;
struct resource ifp_resource;
int resource_valid;
struct page *scratch_page;
dma_addr_t scratch_page_dma;
} intel_private;
#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
#define HAS_PGTBL_EN intel_private.driver->has_pgtbl_enable
static int intel_gtt_setup_scratch_page(void)
{
addr_t page;
page = AllocPage();
if (page == 0)
return -ENOMEM;
intel_private.scratch_page_dma = page;
intel_private.scratch_page = NULL;
return 0;
}
static unsigned int intel_gtt_stolen_size(void)
{
u16 gmch_ctrl;
u8 rdct;
int local = 0;
static const int ddt[4] = { 0, 16, 32, 64 };
unsigned int stolen_size = 0;
if (INTEL_GTT_GEN == 1)
return 0; /* no stolen mem on i81x */
pci_read_config_word(intel_private.bridge_dev,
I830_GMCH_CTRL, &gmch_ctrl);
if (intel_private.bridge_dev->device == PCI_DEVICE_ID_INTEL_82830_HB ||
intel_private.bridge_dev->device == PCI_DEVICE_ID_INTEL_82845G_HB) {
switch (gmch_ctrl & I830_GMCH_GMS_MASK) {
case I830_GMCH_GMS_STOLEN_512:
stolen_size = KB(512);
break;
case I830_GMCH_GMS_STOLEN_1024:
stolen_size = MB(1);
break;
case I830_GMCH_GMS_STOLEN_8192:
stolen_size = MB(8);
break;
case I830_GMCH_GMS_LOCAL:
rdct = readb(intel_private.registers+I830_RDRAM_CHANNEL_TYPE);
stolen_size = (I830_RDRAM_ND(rdct) + 1) *
MB(ddt[I830_RDRAM_DDT(rdct)]);
local = 1;
break;
default:
stolen_size = 0;
break;
}
} else if (INTEL_GTT_GEN == 6) {
/*
* 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:
stolen_size = MB(32);
break;
case SNB_GMCH_GMS_STOLEN_64M:
stolen_size = MB(64);
break;
case SNB_GMCH_GMS_STOLEN_96M:
stolen_size = MB(96);
break;
case SNB_GMCH_GMS_STOLEN_128M:
stolen_size = MB(128);
break;
case SNB_GMCH_GMS_STOLEN_160M:
stolen_size = MB(160);
break;
case SNB_GMCH_GMS_STOLEN_192M:
stolen_size = MB(192);
break;
case SNB_GMCH_GMS_STOLEN_224M:
stolen_size = MB(224);
break;
case SNB_GMCH_GMS_STOLEN_256M:
stolen_size = MB(256);
break;
case SNB_GMCH_GMS_STOLEN_288M:
stolen_size = MB(288);
break;
case SNB_GMCH_GMS_STOLEN_320M:
stolen_size = MB(320);
break;
case SNB_GMCH_GMS_STOLEN_352M:
stolen_size = MB(352);
break;
case SNB_GMCH_GMS_STOLEN_384M:
stolen_size = MB(384);
break;
case SNB_GMCH_GMS_STOLEN_416M:
stolen_size = MB(416);
break;
case SNB_GMCH_GMS_STOLEN_448M:
stolen_size = MB(448);
break;
case SNB_GMCH_GMS_STOLEN_480M:
stolen_size = MB(480);
break;
case SNB_GMCH_GMS_STOLEN_512M:
stolen_size = MB(512);
break;
}
} else {
switch (gmch_ctrl & I855_GMCH_GMS_MASK) {
case I855_GMCH_GMS_STOLEN_1M:
stolen_size = MB(1);
break;
case I855_GMCH_GMS_STOLEN_4M:
stolen_size = MB(4);
break;
case I855_GMCH_GMS_STOLEN_8M:
stolen_size = MB(8);
break;
case I855_GMCH_GMS_STOLEN_16M:
stolen_size = MB(16);
break;
case I855_GMCH_GMS_STOLEN_32M:
stolen_size = MB(32);
break;
case I915_GMCH_GMS_STOLEN_48M:
stolen_size = MB(48);
break;
case I915_GMCH_GMS_STOLEN_64M:
stolen_size = MB(64);
break;
case G33_GMCH_GMS_STOLEN_128M:
stolen_size = MB(128);
break;
case G33_GMCH_GMS_STOLEN_256M:
stolen_size = MB(256);
break;
case INTEL_GMCH_GMS_STOLEN_96M:
stolen_size = MB(96);
break;
case INTEL_GMCH_GMS_STOLEN_160M:
stolen_size = MB(160);
break;
case INTEL_GMCH_GMS_STOLEN_224M:
stolen_size = MB(224);
break;
case INTEL_GMCH_GMS_STOLEN_352M:
stolen_size = MB(352);
break;
default:
stolen_size = 0;
break;
}
}
if (stolen_size > 0) {
dbgprintf("detected %dK %s memory\n",
stolen_size / KB(1), local ? "local" : "stolen");
} else {
dbgprintf("no pre-allocated video memory detected\n");
stolen_size = 0;
}
return stolen_size;
}
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)
{
int size;
u32 pgetbl_ctl;
u16 gmch_ctl;
pci_read_config_word(intel_private.bridge_dev,
I830_GMCH_CTRL, &gmch_ctl);
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);
break;
case G4x_GMCH_SIZE_VT_1_5M:
i965_adjust_pgetbl_size(I965_PGETBL_SIZE_1_5MB);
break;
case G4x_GMCH_SIZE_2M:
case G4x_GMCH_SIZE_VT_2M:
i965_adjust_pgetbl_size(I965_PGETBL_SIZE_2MB);
break;
}
}
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:
dbgprintf("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) {
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;
}
return size/4;
} else {
/* On previous hardware, the GTT size was just what was
* required to map the aperture.
*/
return intel_private.base.gtt_mappable_entries;
}
}
static unsigned int intel_gtt_mappable_entries(void)
{
unsigned int aperture_size;
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) {
u16 gmch_ctrl;
pci_read_config_word(intel_private.bridge_dev,
I830_GMCH_CTRL, &gmch_ctrl);
if ((gmch_ctrl & I830_GMCH_MEM_MASK) == I830_GMCH_MEM_64M)
aperture_size = MB(64);
else
aperture_size = MB(128);
} else {
/* 9xx supports large sizes, just look at the length */
aperture_size = pci_resource_len(intel_private.pcidev, 2);
}
return aperture_size >> PAGE_SHIFT;
}
static void intel_gtt_teardown_scratch_page(void)
{
// FreePage(intel_private.scratch_page_dma);
}
static void intel_gtt_cleanup(void)
{
intel_private.driver->cleanup();
FreeKernelSpace(intel_private.gtt);
FreeKernelSpace(intel_private.registers);
// intel_gtt_teardown_scratch_page();
}
static int intel_gtt_init(void)
{
u32 gtt_map_size;
int ret;
ENTER();
ret = intel_private.driver->setup();
if (ret != 0)
{
LEAVE();
return ret;
};
intel_private.base.gtt_mappable_entries = intel_gtt_mappable_entries();
intel_private.base.gtt_total_entries = intel_gtt_total_entries();
/* save the PGETBL reg for resume */
intel_private.PGETBL_save =
readl(intel_private.registers+I810_PGETBL_CTL)
& ~I810_PGETBL_ENABLED;
/* we only ever restore the register when enabling the PGTBL... */
if (HAS_PGTBL_EN)
intel_private.PGETBL_save |= I810_PGETBL_ENABLED;
dbgprintf("detected gtt size: %dK total, %dK mappable\n",
intel_private.base.gtt_total_entries * 4,
intel_private.base.gtt_mappable_entries * 4);
gtt_map_size = intel_private.base.gtt_total_entries * 4;
intel_private.gtt = (u32*)MapIoMem(intel_private.gtt_bus_addr,
gtt_map_size, PG_SW+PG_NOCACHE);
if (!intel_private.gtt) {
intel_private.driver->cleanup();
FreeKernelSpace(intel_private.registers);
return -ENOMEM;
}
asm volatile("wbinvd");
intel_private.base.stolen_size = intel_gtt_stolen_size();
intel_private.base.needs_dmar = USE_PCI_DMA_API && INTEL_GTT_GEN > 2;
ret = intel_gtt_setup_scratch_page();
if (ret != 0) {
intel_gtt_cleanup();
return ret;
}
intel_enable_gtt();
LEAVE();
return 0;
}
static bool intel_enable_gtt(void)
{
u32 gma_addr;
u8 __iomem *reg;
if (INTEL_GTT_GEN <= 2)
pci_read_config_dword(intel_private.pcidev, I810_GMADDR,
&gma_addr);
else
pci_read_config_dword(intel_private.pcidev, I915_GMADDR,
&gma_addr);
intel_private.gma_bus_addr = (gma_addr & PCI_BASE_ADDRESS_MEM_MASK);
if (INTEL_GTT_GEN >= 6)
return true;
if (INTEL_GTT_GEN == 2) {
u16 gmch_ctrl;
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) {
dbgprintf("failed to enable the GTT: GMCH_CTRL=%x\n",
gmch_ctrl);
return false;
}
}
/* 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);
reg = intel_private.registers+I810_PGETBL_CTL;
writel(intel_private.PGETBL_save, reg);
if (HAS_PGTBL_EN && (readl(reg) & I810_PGETBL_ENABLED) == 0) {
dbgprintf("failed to enable the GTT: PGETBL=%x [expected %x]\n",
readl(reg), intel_private.PGETBL_save);
return false;
}
if (INTEL_GTT_GEN >= 3)
writel(0, intel_private.registers+GFX_FLSH_CNTL);
return true;
}
static void intel_i9xx_setup_flush(void)
{
/* return if already configured */
if (intel_private.ifp_resource.start)
return;
if (INTEL_GTT_GEN == 6)
return;
#if 0
/* 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 */
if (IS_G33 || INTEL_GTT_GEN >= 4) {
intel_i965_g33_setup_chipset_flush();
} else {
intel_i915_setup_chipset_flush();
}
if (intel_private.ifp_resource.start)
intel_private.i9xx_flush_page = ioremap_nocache(intel_private.ifp_resource.start, PAGE_SIZE);
if (!intel_private.i9xx_flush_page)
dev_err(&intel_private.pcidev->dev,
"can't ioremap flush page - no chipset flushing\n");
#endif
}
static void i9xx_chipset_flush(void)
{
if (intel_private.i9xx_flush_page)
writel(1, intel_private.i9xx_flush_page);
}
static bool gen6_check_flags(unsigned int flags)
{
return true;
}
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;
if (type_mask == AGP_USER_MEMORY)
pte_flags = GEN6_PTE_UNCACHED | I810_PTE_VALID;
else if (type_mask == AGP_USER_CACHED_MEMORY_LLC_MLC) {
pte_flags = GEN6_PTE_LLC_MLC | I810_PTE_VALID;
if (gfdt)
pte_flags |= GEN6_PTE_GFDT;
} else { /* set 'normal'/'cached' to LLC by default */
pte_flags = GEN6_PTE_LLC | I810_PTE_VALID;
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);
}
static void gen6_cleanup(void)
{
}
static int i9xx_setup(void)
{
u32 reg_addr;
pci_read_config_dword(intel_private.pcidev, I915_MMADDR, &reg_addr);
reg_addr &= 0xfff80000;
intel_private.registers = (u8*)MapIoMem(reg_addr, 128 * 4096, PG_SW+PG_NOCACHE);
if (!intel_private.registers)
return -ENOMEM;
if (INTEL_GTT_GEN == 3) {
u32 gtt_addr;
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;
}
intel_i9xx_setup_flush();
return 0;
}
static const struct intel_gtt_driver sandybridge_gtt_driver = {
.gen = 6,
.setup = i9xx_setup,
.cleanup = gen6_cleanup,
.write_entry = gen6_write_entry,
.dma_mask_size = 40,
.check_flags = gen6_check_flags,
.chipset_flush = i9xx_chipset_flush,
};
/* 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;
const struct intel_gtt_driver *gtt_driver;
} intel_gtt_chipsets[] = {
{ PCI_DEVICE_ID_INTEL_SANDYBRIDGE_GT1_IG,
"Sandybridge", &sandybridge_gtt_driver },
{ PCI_DEVICE_ID_INTEL_SANDYBRIDGE_GT2_IG,
"Sandybridge", &sandybridge_gtt_driver },
{ PCI_DEVICE_ID_INTEL_SANDYBRIDGE_GT2_PLUS_IG,
"Sandybridge", &sandybridge_gtt_driver },
{ PCI_DEVICE_ID_INTEL_SANDYBRIDGE_M_GT1_IG,
"Sandybridge", &sandybridge_gtt_driver },
{ PCI_DEVICE_ID_INTEL_SANDYBRIDGE_M_GT2_IG,
"Sandybridge", &sandybridge_gtt_driver },
{ PCI_DEVICE_ID_INTEL_SANDYBRIDGE_M_GT2_PLUS_IG,
"Sandybridge", &sandybridge_gtt_driver },
{ PCI_DEVICE_ID_INTEL_SANDYBRIDGE_S_IG,
"Sandybridge", &sandybridge_gtt_driver },
{ 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;
}
int intel_gmch_probe(struct pci_dev *pdev,
struct agp_bridge_data *bridge)
{
int i, mask;
intel_private.driver = NULL;
for (i = 0; intel_gtt_chipsets[i].name != NULL; i++) {
if (find_gmch(intel_gtt_chipsets[i].gmch_chip_id)) {
intel_private.driver =
intel_gtt_chipsets[i].gtt_driver;
break;
}
}
if (!intel_private.driver)
return 0;
// bridge->driver = &intel_fake_agp_driver;
bridge->dev_private_data = &intel_private;
bridge->dev = pdev;
intel_private.bridge_dev = pdev;
dbgprintf("Intel %s Chipset\n", intel_gtt_chipsets[i].name);
mask = intel_private.driver->dma_mask_size;
// 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));
/*if (bridge->driver == &intel_810_driver)
return 1;*/
if (intel_gtt_init() != 0)
return 0;
return 1;
}
const struct intel_gtt *intel_gtt_get(void)
{
return &intel_private.base;
}
Reference in New Issue View Git Blame Copy Permalink