diff options
Diffstat (limited to 'drivers/char/agp/intel-gtt.c')
| -rw-r--r-- | drivers/char/agp/intel-gtt.c | 43 |
1 files changed, 27 insertions, 16 deletions
diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c index 9c86dac41da..f800e9cfc36 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); @@ -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) { @@ -803,6 +805,9 @@ static int intel_gtt_init(void) 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", @@ -925,7 +930,6 @@ static void i830_write_entry(dma_addr_t addr, unsigned int entry, static bool intel_enable_gtt(void) { u32 gma_addr; - u16 gmch_ctrl; u8 __iomem *reg; if (INTEL_GTT_GEN == 2) @@ -940,26 +944,30 @@ static bool intel_enable_gtt(void) if (INTEL_GTT_GEN >= 6) return true; - 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 == 2) { + u16 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; + 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|I810_PGETBL_ENABLED, reg); - if ((readl(reg) & I810_PGETBL_ENABLED) == 0) { + 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|1]\n", + "failed to enable the GTT: PGETBL=%x [expected %x]\n", readl(reg), intel_private.PGETBL_save); return false; } @@ -1395,6 +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, @@ -1404,6 +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). */ @@ -1434,6 +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, |