From ec2a4c3fdc8e82fe82a25d800e85c1ea06b74372 Mon Sep 17 00:00:00 2001 From: Dave Airlie Date: Tue, 4 Aug 2009 11:43:41 +1000 Subject: [PATCH] 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_dma.c | 33 +++++++++---- drivers/gpu/drm/i915/i915_drv.h | 1 + drivers/gpu/drm/i915/i915_gem_tiling.c | 65 ++++++++------------------ 3 files changed, 44 insertions(+), 55 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c index 91ef4c150193..9909505d070a 100644 --- a/drivers/gpu/drm/i915/i915_dma.c +++ b/drivers/gpu/drm/i915/i915_dma.c @@ -898,6 +898,18 @@ static int i915_set_status_page(struct drm_device *dev, void *data, return 0; } +static int i915_get_bridge_dev(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + + dev_priv->bridge_dev = pci_get_bus_and_slot(0, PCI_DEVFN(0,0)); + if (!dev_priv->bridge_dev) { + DRM_ERROR("bridge device not found\n"); + return -1; + } + return 0; +} + /** * i915_probe_agp - get AGP bootup configuration * @pdev: PCI device @@ -911,20 +923,13 @@ static int i915_set_status_page(struct drm_device *dev, void *data, static int i915_probe_agp(struct drm_device *dev, uint32_t *aperture_size, uint32_t *preallocated_size) { - struct pci_dev *bridge_dev; + struct drm_i915_private *dev_priv = dev->dev_private; u16 tmp = 0; unsigned long overhead; unsigned long stolen; - bridge_dev = pci_get_bus_and_slot(0, PCI_DEVFN(0,0)); - if (!bridge_dev) { - DRM_ERROR("bridge device not found\n"); - return -1; - } - /* Get the fb aperture size and "stolen" memory amount. */ - pci_read_config_word(bridge_dev, INTEL_GMCH_CTRL, &tmp); - pci_dev_put(bridge_dev); + pci_read_config_word(dev_priv->bridge_dev, INTEL_GMCH_CTRL, &tmp); *aperture_size = 1024 * 1024; *preallocated_size = 1024 * 1024; @@ -1176,11 +1181,16 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags) base = drm_get_resource_start(dev, mmio_bar); size = drm_get_resource_len(dev, mmio_bar); + if (i915_get_bridge_dev(dev)) { + ret = -EIO; + goto free_priv; + } + dev_priv->regs = ioremap(base, size); if (!dev_priv->regs) { DRM_ERROR("failed to map registers\n"); ret = -EIO; - goto free_priv; + goto put_bridge; } dev_priv->mm.gtt_mapping = @@ -1292,6 +1302,8 @@ out_iomapfree: io_mapping_free(dev_priv->mm.gtt_mapping); out_rmmap: iounmap(dev_priv->regs); +put_bridge: + pci_dev_put(dev_priv->bridge_dev); free_priv: kfree(dev_priv); return ret; @@ -1335,6 +1347,7 @@ int i915_driver_unload(struct drm_device *dev) i915_gem_lastclose(dev); } + pci_dev_put(dev_priv->bridge_dev); kfree(dev->dev_private); return 0; diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 2d5bce643e6a..77ed060b4292 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -155,6 +155,7 @@ typedef struct drm_i915_private { void __iomem *regs; + struct pci_dev *bridge_dev; drm_i915_ring_buffer_t ring; drm_dma_handle_t *status_page_dmah; diff --git a/drivers/gpu/drm/i915/i915_gem_tiling.c b/drivers/gpu/drm/i915/i915_gem_tiling.c index e774a4a1a503..200e398453ca 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); } } -- 2.20.1