summaryrefslogtreecommitdiffstats
path: root/drivers/char
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/char')
-rw-r--r--drivers/char/agp/intel-agp.h14
-rw-r--r--drivers/char/agp/intel-gtt.c160
2 files changed, 130 insertions, 44 deletions
diff --git a/drivers/char/agp/intel-agp.h b/drivers/char/agp/intel-agp.h
index 90539df02504..010e3defd6c3 100644
--- a/drivers/char/agp/intel-agp.h
+++ b/drivers/char/agp/intel-agp.h
@@ -75,6 +75,8 @@
#define I810_GMS_DISABLE 0x00000000
#define I810_PGETBL_CTL 0x2020
#define I810_PGETBL_ENABLED 0x00000001
+/* Note: PGETBL_CTL2 has a different offset on G33. */
+#define I965_PGETBL_CTL2 0x20c4
#define I965_PGETBL_SIZE_MASK 0x0000000e
#define I965_PGETBL_SIZE_512KB (0 << 1)
#define I965_PGETBL_SIZE_256KB (1 << 1)
@@ -82,9 +84,15 @@
#define I965_PGETBL_SIZE_1MB (3 << 1)
#define I965_PGETBL_SIZE_2MB (4 << 1)
#define I965_PGETBL_SIZE_1_5MB (5 << 1)
-#define G33_PGETBL_SIZE_MASK (3 << 8)
-#define G33_PGETBL_SIZE_1M (1 << 8)
-#define G33_PGETBL_SIZE_2M (2 << 8)
+#define G33_GMCH_SIZE_MASK (3 << 8)
+#define G33_GMCH_SIZE_1M (1 << 8)
+#define G33_GMCH_SIZE_2M (2 << 8)
+#define G4x_GMCH_SIZE_MASK (0xf << 8)
+#define G4x_GMCH_SIZE_1M (0x1 << 8)
+#define G4x_GMCH_SIZE_2M (0x3 << 8)
+#define G4x_GMCH_SIZE_VT_1M (0x9 << 8)
+#define G4x_GMCH_SIZE_VT_1_5M (0xa << 8)
+#define G4x_GMCH_SIZE_VT_2M (0xc << 8)
#define I810_DRAM_CTL 0x3000
#define I810_DRAM_ROW_0 0x00000001
diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c
index 9272c38dd3c6..fc1637c32cb1 100644
--- a/drivers/char/agp/intel-gtt.c
+++ b/drivers/char/agp/intel-gtt.c
@@ -73,6 +73,7 @@ struct intel_gtt_driver {
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);
@@ -95,7 +96,7 @@ static struct _intel_private {
u8 __iomem *registers;
phys_addr_t gtt_bus_addr;
phys_addr_t gma_bus_addr;
- phys_addr_t pte_bus_addr;
+ u32 PGETBL_save;
u32 __iomem *gtt; /* I915G */
int num_dcache_entries;
union {
@@ -113,6 +114,7 @@ static struct _intel_private {
#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 void intel_agp_free_sglist(struct agp_memory *mem)
{
@@ -642,41 +644,85 @@ static unsigned int intel_gtt_stolen_entries(void)
return stolen_entries;
}
-static unsigned int intel_gtt_total_entries(void)
+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;
- if (IS_G33 || INTEL_GTT_GEN == 4 || INTEL_GTT_GEN == 5) {
- u32 pgetbl_ctl;
- pgetbl_ctl = readl(intel_private.registers+I810_PGETBL_CTL);
+ pci_read_config_word(intel_private.bridge_dev,
+ I830_GMCH_CTRL, &gmch_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);
+ 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 I965_PGETBL_SIZE_1MB:
- size = KB(1024);
+ case G4x_GMCH_SIZE_VT_1_5M:
+ i965_adjust_pgetbl_size(I965_PGETBL_SIZE_1_5MB);
break;
- case I965_PGETBL_SIZE_2MB:
- size = KB(2048);
+ case G4x_GMCH_SIZE_2M:
+ case G4x_GMCH_SIZE_VT_2M:
+ i965_adjust_pgetbl_size(I965_PGETBL_SIZE_2MB);
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;
- } else if (INTEL_GTT_GEN == 6) {
+ 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) {
u16 snb_gmch_ctl;
pci_read_config_word(intel_private.pcidev, SNB_GMCH_CTRL, &snb_gmch_ctl);
@@ -755,6 +801,14 @@ static int intel_gtt_init(void)
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;
+
dev_info(&intel_private.bridge_dev->dev,
"detected gtt size: %dK total, %dK mappable\n",
intel_private.base.gtt_total_entries * 4,
@@ -873,10 +927,10 @@ static void i830_write_entry(dma_addr_t addr, unsigned int entry,
writel(addr | pte_flags, intel_private.gtt + entry);
}
-static void intel_enable_gtt(void)
+static bool intel_enable_gtt(void)
{
u32 gma_addr;
- u16 gmch_ctrl;
+ u8 __iomem *reg;
if (INTEL_GTT_GEN == 2)
pci_read_config_dword(intel_private.pcidev, I810_GMADDR,
@@ -887,13 +941,38 @@ static void intel_enable_gtt(void)
intel_private.gma_bus_addr = (gma_addr & PCI_BASE_ADDRESS_MEM_MASK);
- 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);
+ if (INTEL_GTT_GEN >= 6)
+ return true;
- writel(intel_private.pte_bus_addr|I810_PGETBL_ENABLED,
- intel_private.registers+I810_PGETBL_CTL);
- readl(intel_private.registers+I810_PGETBL_CTL); /* PCI Posting. */
+ 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) {
+ dev_err(&intel_private.pcidev->dev,
+ "failed to enable the GTT: GMCH_CTRL=%x\n",
+ gmch_ctrl);
+ return false;
+ }
+ }
+
+ reg = intel_private.registers+I810_PGETBL_CTL;
+ writel(intel_private.PGETBL_save, reg);
+ if (HAS_PGTBL_EN && (readl(reg) & I810_PGETBL_ENABLED) == 0) {
+ dev_err(&intel_private.pcidev->dev,
+ "failed to enable the GTT: PGETBL=%x [expected %x]\n",
+ readl(reg), intel_private.PGETBL_save);
+ return false;
+ }
+
+ return true;
}
static int i830_setup(void)
@@ -908,8 +987,6 @@ static int i830_setup(void)
return -ENOMEM;
intel_private.gtt_bus_addr = reg_addr + I810_PTE_BASE;
- intel_private.pte_bus_addr =
- readl(intel_private.registers+I810_PGETBL_CTL) & 0xfffff000;
intel_i830_setup_flush();
@@ -934,7 +1011,8 @@ static int intel_fake_agp_configure(void)
{
int i;
- intel_enable_gtt();
+ if (!intel_enable_gtt())
+ return -EIO;
agp_bridge->gart_bus_addr = intel_private.gma_bus_addr;
@@ -1265,9 +1343,6 @@ static int i9xx_setup(void)
intel_private.gtt_bus_addr = reg_addr + gtt_offset;
}
- intel_private.pte_bus_addr =
- readl(intel_private.registers+I810_PGETBL_CTL) & 0xfffff000;
-
intel_i9xx_setup_flush();
return 0;
@@ -1328,6 +1403,7 @@ static const struct intel_gtt_driver i81x_gtt_driver = {
};
static const struct intel_gtt_driver i8xx_gtt_driver = {
.gen = 2,
+ .has_pgtbl_enable = 1,
.setup = i830_setup,
.cleanup = i830_cleanup,
.write_entry = i830_write_entry,
@@ -1337,6 +1413,7 @@ static const struct intel_gtt_driver i8xx_gtt_driver = {
};
static const struct intel_gtt_driver i915_gtt_driver = {
.gen = 3,
+ .has_pgtbl_enable = 1,
.setup = i9xx_setup,
.cleanup = i9xx_cleanup,
/* i945 is the last gpu to need phys mem (for overlay and cursors). */
@@ -1367,6 +1444,7 @@ static const struct intel_gtt_driver pineview_gtt_driver = {
};
static const struct intel_gtt_driver i965_gtt_driver = {
.gen = 4,
+ .has_pgtbl_enable = 1,
.setup = i9xx_setup,
.cleanup = i9xx_cleanup,
.write_entry = i965_write_entry,
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-28 13:52:40 +0100