From ec2a4c3fdc8e82fe82a25d800e85c1ea06b74372 Mon Sep 17 00:00:00 2001 From: Dave Airlie Date: Tue, 4 Aug 2009 11:43:41 +1000 Subject: drm/i915: get the bridge device once. The driver gets the bridge device in a number of places, upcoming vga arb code paths need the bridge device, however they need it in under a lock, and the pci lookup can allocate memory. So clean this code up before then and get the bridge once for the driver lifetime. Signed-off-by: Dave Airlie --- drivers/gpu/drm/i915/i915_gem_tiling.c | 65 +++++++++++----------------------- 1 file changed, 20 insertions(+), 45 deletions(-) (limited to 'drivers/gpu/drm/i915/i915_gem_tiling.c') diff --git a/drivers/gpu/drm/i915/i915_gem_tiling.c b/drivers/gpu/drm/i915/i915_gem_tiling.c index e774a4a1a50..200e398453c 100644 --- a/drivers/gpu/drm/i915/i915_gem_tiling.c +++ b/drivers/gpu/drm/i915/i915_gem_tiling.c @@ -94,23 +94,15 @@ static int intel_alloc_mchbar_resource(struct drm_device *dev) { - struct pci_dev *bridge_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; - bridge_dev = pci_get_bus_and_slot(0, PCI_DEVFN(0,0)); - if (!bridge_dev) { - DRM_DEBUG("no bridge dev?!\n"); - ret = -ENODEV; - goto out; - } - if (IS_I965G(dev)) - pci_read_config_dword(bridge_dev, reg + 4, &temp_hi); - pci_read_config_dword(bridge_dev, reg, &temp_lo); + 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 */ @@ -118,30 +110,28 @@ intel_alloc_mchbar_resource(struct drm_device *dev) if (mchbar_addr && pnp_range_reserved(mchbar_addr, mchbar_addr + MCHBAR_SIZE)) { ret = 0; - goto out_put; + goto out; } #endif /* Get some space for it */ - ret = pci_bus_alloc_resource(bridge_dev->bus, &dev_priv->mch_res, + 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, - bridge_dev); + dev_priv->bridge_dev); if (ret) { DRM_DEBUG("failed bus alloc: %d\n", ret); dev_priv->mch_res.start = 0; - goto out_put; + goto out; } if (IS_I965G(dev)) - pci_write_config_dword(bridge_dev, reg + 4, + pci_write_config_dword(dev_priv->bridge_dev, reg + 4, upper_32_bits(dev_priv->mch_res.start)); - pci_write_config_dword(bridge_dev, reg, + pci_write_config_dword(dev_priv->bridge_dev, reg, lower_32_bits(dev_priv->mch_res.start)); -out_put: - pci_dev_put(bridge_dev); out: return ret; } @@ -150,44 +140,36 @@ out: static bool intel_setup_mchbar(struct drm_device *dev) { - struct pci_dev *bridge_dev; + drm_i915_private_t *dev_priv = dev->dev_private; int mchbar_reg = IS_I965G(dev) ? MCHBAR_I965 : MCHBAR_I915; u32 temp; bool need_disable = false, enabled; - bridge_dev = pci_get_bus_and_slot(0, PCI_DEVFN(0,0)); - if (!bridge_dev) { - DRM_DEBUG("no bridge dev?!\n"); - goto out; - } - if (IS_I915G(dev) || IS_I915GM(dev)) { - pci_read_config_dword(bridge_dev, DEVEN_REG, &temp); + pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp); enabled = !!(temp & DEVEN_MCHBAR_EN); } else { - pci_read_config_dword(bridge_dev, mchbar_reg, &temp); + 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) - goto out_put; + goto out; if (intel_alloc_mchbar_resource(dev)) - goto out_put; + goto out; need_disable = true; /* Space is allocated or reserved, so enable it. */ if (IS_I915G(dev) || IS_I915GM(dev)) { - pci_write_config_dword(bridge_dev, DEVEN_REG, + pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG, temp | DEVEN_MCHBAR_EN); } else { - pci_read_config_dword(bridge_dev, mchbar_reg, &temp); - pci_write_config_dword(bridge_dev, mchbar_reg, temp | 1); + pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp); + pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp | 1); } -out_put: - pci_dev_put(bridge_dev); out: return need_disable; } @@ -196,25 +178,18 @@ static void intel_teardown_mchbar(struct drm_device *dev, bool disable) { drm_i915_private_t *dev_priv = dev->dev_private; - struct pci_dev *bridge_dev; int mchbar_reg = IS_I965G(dev) ? MCHBAR_I965 : MCHBAR_I915; u32 temp; - bridge_dev = pci_get_bus_and_slot(0, PCI_DEVFN(0,0)); - if (!bridge_dev) { - DRM_DEBUG("no bridge dev?!\n"); - return; - } - if (disable) { if (IS_I915G(dev) || IS_I915GM(dev)) { - pci_read_config_dword(bridge_dev, DEVEN_REG, &temp); + pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp); temp &= ~DEVEN_MCHBAR_EN; - pci_write_config_dword(bridge_dev, DEVEN_REG, temp); + pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG, temp); } else { - pci_read_config_dword(bridge_dev, mchbar_reg, &temp); + pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp); temp &= ~1; - pci_write_config_dword(bridge_dev, mchbar_reg, temp); + pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp); } } -- cgit v1.2.3