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authorPaul Mackerras <paulus@samba.org>2005-09-06 05:17:54 +0200
committerPaul Mackerras <paulus@samba.org>2005-09-09 14:11:38 +0200
commit1635317facea3094ddf34082cd86797efb1d9f7e (patch)
tree67d5a4d4c7af00ac4be4608092fec99a32683715 /include/asm-ppc64/pci-bridge.h
parent[PATCH] ppc64: remove use of asm/segment.h (diff)
downloadlinux-1635317facea3094ddf34082cd86797efb1d9f7e.tar.xz
linux-1635317facea3094ddf34082cd86797efb1d9f7e.zip
[PATCH] Separate pci bits out of struct device_node
This patch pulls the PCI-related junk out of struct device_node and puts it in a separate structure, struct pci_dn. The device_node now just has a void * pointer in it, which points to a struct pci_dn for nodes that represent PCI devices. It could potentially be used in future for device-specific data for other sorts of devices, such as virtual I/O devices. Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'include/asm-ppc64/pci-bridge.h')
-rw-r--r--include/asm-ppc64/pci-bridge.h45
1 files changed, 39 insertions, 6 deletions
diff --git a/include/asm-ppc64/pci-bridge.h b/include/asm-ppc64/pci-bridge.h
index c4f9023ea5ed..6b4a5b1f695e 100644
--- a/include/asm-ppc64/pci-bridge.h
+++ b/include/asm-ppc64/pci-bridge.h
@@ -48,19 +48,52 @@ struct pci_controller {
unsigned long dma_window_size;
};
+/*
+ * PCI stuff, for nodes representing PCI devices, pointed to
+ * by device_node->data.
+ */
+struct pci_controller;
+struct iommu_table;
+
+struct pci_dn {
+ int busno; /* for pci devices */
+ int bussubno; /* for pci devices */
+ int devfn; /* for pci devices */
+ int eeh_mode; /* See eeh.h for possible EEH_MODEs */
+ int eeh_config_addr;
+ int eeh_capable; /* from firmware */
+ int eeh_check_count; /* # times driver ignored error */
+ int eeh_freeze_count; /* # times this device froze up. */
+ int eeh_is_bridge; /* device is pci-to-pci bridge */
+
+ int pci_ext_config_space; /* for pci devices */
+ struct pci_controller *phb; /* for pci devices */
+ struct iommu_table *iommu_table; /* for phb's or bridges */
+ struct pci_dev *pcidev; /* back-pointer to the pci device */
+ struct device_node *node; /* back-pointer to the device_node */
+ u32 config_space[16]; /* saved PCI config space */
+};
+
+/* Get the pointer to a device_node's pci_dn */
+#define PCI_DN(dn) ((struct pci_dn *) (dn)->data)
+
struct device_node *fetch_dev_dn(struct pci_dev *dev);
-/* Get a device_node from a pci_dev. This code must be fast except in the case
- * where the sysdata is incorrect and needs to be fixed up (hopefully just once)
+/* Get a device_node from a pci_dev. This code must be fast except
+ * in the case where the sysdata is incorrect and needs to be fixed
+ * up (this will only happen once).
+ * In this case the sysdata will have been inherited from a PCI host
+ * bridge or a PCI-PCI bridge further up the tree, so it will point
+ * to a valid struct pci_dn, just not the one we want.
*/
static inline struct device_node *pci_device_to_OF_node(struct pci_dev *dev)
{
struct device_node *dn = dev->sysdata;
+ struct pci_dn *pdn = dn->data;
- if (dn->devfn == dev->devfn && dn->busno == dev->bus->number)
+ if (pdn && pdn->devfn == dev->devfn && pdn->busno == dev->bus->number)
return dn; /* fast path. sysdata is good */
- else
- return fetch_dev_dn(dev);
+ return fetch_dev_dn(dev);
}
static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
@@ -83,7 +116,7 @@ static inline struct pci_controller *pci_bus_to_host(struct pci_bus *bus)
struct device_node *busdn = bus->sysdata;
BUG_ON(busdn == NULL);
- return busdn->phb;
+ return PCI_DN(busdn)->phb;
}
#endif