diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_dma.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_dma.c | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c index 2307f98349f..dbfe07c90cb 100644 --- a/drivers/gpu/drm/i915/i915_dma.c +++ b/drivers/gpu/drm/i915/i915_dma.c @@ -35,6 +35,8 @@ #include "i915_drv.h" #include "i915_trace.h" #include <linux/vgaarb.h> +#include <linux/acpi.h> +#include <linux/pnp.h> /* Really want an OS-independent resettable timer. Would like to have * this loop run for (eg) 3 sec, but have the timer reset every time @@ -933,6 +935,120 @@ static int i915_get_bridge_dev(struct drm_device *dev) return 0; } +#define MCHBAR_I915 0x44 +#define MCHBAR_I965 0x48 +#define MCHBAR_SIZE (4*4096) + +#define DEVEN_REG 0x54 +#define DEVEN_MCHBAR_EN (1 << 28) + +/* Allocate space for the MCH regs if needed, return nonzero on error */ +static int +intel_alloc_mchbar_resource(struct drm_device *dev) +{ + drm_i915_private_t *dev_priv = dev->dev_private; + int reg = IS_I965G(dev) ? MCHBAR_I965 : MCHBAR_I915; + u32 temp_lo, temp_hi = 0; + u64 mchbar_addr; + int ret = 0; + + if (IS_I965G(dev)) + pci_read_config_dword(dev_priv->bridge_dev, reg + 4, &temp_hi); + pci_read_config_dword(dev_priv->bridge_dev, reg, &temp_lo); + mchbar_addr = ((u64)temp_hi << 32) | temp_lo; + + /* If ACPI doesn't have it, assume we need to allocate it ourselves */ +#ifdef CONFIG_PNP + if (mchbar_addr && + pnp_range_reserved(mchbar_addr, mchbar_addr + MCHBAR_SIZE)) { + ret = 0; + goto out; + } +#endif + + /* Get some space for it */ + ret = pci_bus_alloc_resource(dev_priv->bridge_dev->bus, &dev_priv->mch_res, + MCHBAR_SIZE, MCHBAR_SIZE, + PCIBIOS_MIN_MEM, + 0, pcibios_align_resource, + dev_priv->bridge_dev); + if (ret) { + DRM_DEBUG_DRIVER("failed bus alloc: %d\n", ret); + dev_priv->mch_res.start = 0; + goto out; + } + + if (IS_I965G(dev)) + pci_write_config_dword(dev_priv->bridge_dev, reg + 4, + upper_32_bits(dev_priv->mch_res.start)); + + pci_write_config_dword(dev_priv->bridge_dev, reg, + lower_32_bits(dev_priv->mch_res.start)); +out: + return ret; +} + +/* Setup MCHBAR if possible, return true if we should disable it again */ +static void +intel_setup_mchbar(struct drm_device *dev) +{ + drm_i915_private_t *dev_priv = dev->dev_private; + int mchbar_reg = IS_I965G(dev) ? MCHBAR_I965 : MCHBAR_I915; + u32 temp; + bool enabled; + + dev_priv->mchbar_need_disable = false; + + if (IS_I915G(dev) || IS_I915GM(dev)) { + pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp); + enabled = !!(temp & DEVEN_MCHBAR_EN); + } else { + pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp); + enabled = temp & 1; + } + + /* If it's already enabled, don't have to do anything */ + if (enabled) + return; + + if (intel_alloc_mchbar_resource(dev)) + return; + + dev_priv->mchbar_need_disable = true; + + /* Space is allocated or reserved, so enable it. */ + if (IS_I915G(dev) || IS_I915GM(dev)) { + pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG, + temp | DEVEN_MCHBAR_EN); + } else { + pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp); + pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp | 1); + } +} + +static void +intel_teardown_mchbar(struct drm_device *dev) +{ + drm_i915_private_t *dev_priv = dev->dev_private; + int mchbar_reg = IS_I965G(dev) ? MCHBAR_I965 : MCHBAR_I915; + u32 temp; + + if (dev_priv->mchbar_need_disable) { + if (IS_I915G(dev) || IS_I915GM(dev)) { + pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp); + temp &= ~DEVEN_MCHBAR_EN; + pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG, temp); + } else { + pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp); + temp &= ~1; + pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp); + } + } + + if (dev_priv->mch_res.start) + release_resource(&dev_priv->mch_res); +} + /** * i915_probe_agp - get AGP bootup configuration * @pdev: PCI device @@ -1133,6 +1249,7 @@ static void i915_setup_compression(struct drm_device *dev, int size) /* Leave 1M for line length buffer & misc. */ compressed_fb = drm_mm_search_free(&dev_priv->vram, size, 4096, 0); if (!compressed_fb) { + dev_priv->no_fbc_reason = FBC_STOLEN_TOO_SMALL; i915_warn_stolen(dev); return; } @@ -1140,6 +1257,7 @@ static void i915_setup_compression(struct drm_device *dev, int size) compressed_fb = drm_mm_get_block(compressed_fb, size, 4096); if (!compressed_fb) { i915_warn_stolen(dev); + dev_priv->no_fbc_reason = FBC_STOLEN_TOO_SMALL; return; } @@ -1450,6 +1568,9 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags) dev->driver->get_vblank_counter = gm45_get_vblank_counter; } + /* Try to make sure MCHBAR is enabled before poking at it */ + intel_setup_mchbar(dev); + i915_gem_load(dev); /* Init HWS */ @@ -1523,6 +1644,8 @@ int i915_driver_unload(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; + i915_destroy_error_state(dev); + destroy_workqueue(dev_priv->wq); del_timer_sync(&dev_priv->hangcheck_timer); @@ -1569,6 +1692,8 @@ int i915_driver_unload(struct drm_device *dev) intel_cleanup_overlay(dev); } + intel_teardown_mchbar(dev); + pci_dev_put(dev_priv->bridge_dev); kfree(dev->dev_private); |