diff options
Diffstat (limited to 'meta/packages/linux/linux-moblin2-2.6.27-rc1/0007_i915.Initialize_hardware_status_page_at_device_load_when_possible.patch')
| -rw-r--r-- | meta/packages/linux/linux-moblin2-2.6.27-rc1/0007_i915.Initialize_hardware_status_page_at_device_load_when_possible.patch | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/meta/packages/linux/linux-moblin2-2.6.27-rc1/0007_i915.Initialize_hardware_status_page_at_device_load_when_possible.patch b/meta/packages/linux/linux-moblin2-2.6.27-rc1/0007_i915.Initialize_hardware_status_page_at_device_load_when_possible.patch new file mode 100644 index 000000000..cf646f01c --- /dev/null +++ b/meta/packages/linux/linux-moblin2-2.6.27-rc1/0007_i915.Initialize_hardware_status_page_at_device_load_when_possible.patch @@ -0,0 +1,138 @@ +From: Keith Packard <keithp@keithp.com> +Date: Wed, 30 Jul 2008 20:03:43 +0000 (-0700) +Subject: i915: Initialize hardware status page at device load when possible. +X-Git-Tag: v2.6.12-rc2 +X-Git-Url: http://gitweb.freedesktop.org/?p=users/anholt/anholt/linux-2.6.git;a=commitdiff;h=ddb354254f88965f5f057e67ef775fbb4b35fef8 + +i915: Initialize hardware status page at device load when possible. + +Some chips were unstable with repeated setup/teardown of the hardware status +page. + +Signed-off-by: Eric Anholt <eric@anholt.net> +--- + +--- a/drivers/gpu/drm/i915/i915_dma.c ++++ b/drivers/gpu/drm/i915/i915_dma.c +@@ -71,6 +71,52 @@ int i915_wait_ring(struct drm_device * d + return -EBUSY; + } + ++/** ++ * Sets up the hardware status page for devices that need a physical address ++ * in the register. ++ */ ++int i915_init_phys_hws(struct drm_device *dev) ++{ ++ drm_i915_private_t *dev_priv = dev->dev_private; ++ /* Program Hardware Status Page */ ++ dev_priv->status_page_dmah = ++ drm_pci_alloc(dev, PAGE_SIZE, PAGE_SIZE, 0xffffffff); ++ ++ if (!dev_priv->status_page_dmah) { ++ DRM_ERROR("Can not allocate hardware status page\n"); ++ return -ENOMEM; ++ } ++ dev_priv->hw_status_page = dev_priv->status_page_dmah->vaddr; ++ dev_priv->dma_status_page = dev_priv->status_page_dmah->busaddr; ++ ++ memset(dev_priv->hw_status_page, 0, PAGE_SIZE); ++ ++ I915_WRITE(HWS_PGA, dev_priv->dma_status_page); ++ DRM_DEBUG("Enabled hardware status page\n"); ++ return 0; ++} ++ ++/** ++ * Frees the hardware status page, whether it's a physical address or a virtual ++ * address set up by the X Server. ++ */ ++void i915_free_hws(struct drm_device *dev) ++{ ++ drm_i915_private_t *dev_priv = dev->dev_private; ++ if (dev_priv->status_page_dmah) { ++ drm_pci_free(dev, dev_priv->status_page_dmah); ++ dev_priv->status_page_dmah = NULL; ++ } ++ ++ if (dev_priv->status_gfx_addr) { ++ dev_priv->status_gfx_addr = 0; ++ drm_core_ioremapfree(&dev_priv->hws_map, dev); ++ } ++ ++ /* Need to rewrite hardware status page */ ++ I915_WRITE(HWS_PGA, 0x1ffff000); ++} ++ + void i915_kernel_lost_context(struct drm_device * dev) + { + drm_i915_private_t *dev_priv = dev->dev_private; +@@ -103,18 +149,9 @@ static int i915_dma_cleanup(struct drm_d + dev_priv->ring.map.size = 0; + } + +- if (dev_priv->status_page_dmah) { +- drm_pci_free(dev, dev_priv->status_page_dmah); +- dev_priv->status_page_dmah = NULL; +- /* Need to rewrite hardware status page */ +- I915_WRITE(HWS_PGA, 0x1ffff000); +- } +- +- if (dev_priv->status_gfx_addr) { +- dev_priv->status_gfx_addr = 0; +- drm_core_ioremapfree(&dev_priv->hws_map, dev); +- I915_WRITE(HWS_PGA, 0x1ffff000); +- } ++ /* Clear the HWS virtual address at teardown */ ++ if (I915_NEED_GFX_HWS(dev)) ++ i915_free_hws(dev); + + return 0; + } +@@ -165,23 +202,6 @@ static int i915_initialize(struct drm_de + */ + dev_priv->allow_batchbuffer = 1; + +- /* Program Hardware Status Page */ +- if (!I915_NEED_GFX_HWS(dev)) { +- dev_priv->status_page_dmah = +- drm_pci_alloc(dev, PAGE_SIZE, PAGE_SIZE, 0xffffffff); +- +- if (!dev_priv->status_page_dmah) { +- i915_dma_cleanup(dev); +- DRM_ERROR("Can not allocate hardware status page\n"); +- return -ENOMEM; +- } +- dev_priv->hw_status_page = dev_priv->status_page_dmah->vaddr; +- dev_priv->dma_status_page = dev_priv->status_page_dmah->busaddr; +- +- memset(dev_priv->hw_status_page, 0, PAGE_SIZE); +- I915_WRITE(HWS_PGA, dev_priv->dma_status_page); +- } +- DRM_DEBUG("Enabled hardware status page\n"); + return 0; + } + +@@ -773,6 +793,12 @@ int i915_driver_load(struct drm_device * + _DRM_KERNEL | _DRM_DRIVER, + &dev_priv->mmio_map); + ++ /* Init HWS */ ++ if (!I915_NEED_GFX_HWS(dev)) { ++ ret = i915_init_phys_hws(dev); ++ if (ret != 0) ++ return ret; ++ } + + /* On the 945G/GM, the chipset reports the MSI capability on the + * integrated graphics even though the support isn't actually there +@@ -796,6 +822,8 @@ int i915_driver_unload(struct drm_device + if (dev->pdev->msi_enabled) + pci_disable_msi(dev->pdev); + ++ i915_free_hws(dev); ++ + if (dev_priv->mmio_map) + drm_rmmap(dev, dev_priv->mmio_map); + + |