b5166cc252
I discovered that in some cases (PowerMac for example) we wouldn't properly map the PCI IO space on recent kernels. In addition, the code for initializing PCI host bridges was scattered all over the place with some duplication between platforms. This patch fixes the problem and does a small cleanup by creating a pcibios_alloc_controller() in pci_64.c that is similar to the one in pci_32.c (just takes an additional device node argument) that takes care of all the grunt allocation and initialisation work. It should work for both boot time and dynamically allocated PHBs. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
152 lines
4.3 KiB
C
152 lines
4.3 KiB
C
#ifdef __KERNEL__
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#ifndef _ASM_PCI_BRIDGE_H
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#define _ASM_PCI_BRIDGE_H
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#include <linux/config.h>
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#include <linux/pci.h>
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#include <linux/list.h>
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/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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/*
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* Structure of a PCI controller (host bridge)
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*/
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struct pci_controller {
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struct pci_bus *bus;
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char is_dynamic;
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void *arch_data;
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struct list_head list_node;
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int first_busno;
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int last_busno;
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void __iomem *io_base_virt;
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unsigned long io_base_phys;
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/* Some machines have a non 1:1 mapping of
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* the PCI memory space in the CPU bus space
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*/
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unsigned long pci_mem_offset;
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unsigned long pci_io_size;
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struct pci_ops *ops;
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volatile unsigned int __iomem *cfg_addr;
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volatile void __iomem *cfg_data;
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/* Currently, we limit ourselves to 1 IO range and 3 mem
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* ranges since the common pci_bus structure can't handle more
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*/
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struct resource io_resource;
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struct resource mem_resources[3];
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int global_number;
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int local_number;
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unsigned long buid;
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unsigned long dma_window_base_cur;
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unsigned long dma_window_size;
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};
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/*
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* PCI stuff, for nodes representing PCI devices, pointed to
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* by device_node->data.
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*/
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struct pci_controller;
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struct iommu_table;
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struct pci_dn {
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int busno; /* for pci devices */
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int bussubno; /* for pci devices */
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int devfn; /* for pci devices */
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#ifdef CONFIG_PPC_PSERIES
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int eeh_mode; /* See eeh.h for possible EEH_MODEs */
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int eeh_config_addr;
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int eeh_check_count; /* # times driver ignored error */
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int eeh_freeze_count; /* # times this device froze up. */
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int eeh_is_bridge; /* device is pci-to-pci bridge */
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#endif
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int pci_ext_config_space; /* for pci devices */
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struct pci_controller *phb; /* for pci devices */
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struct iommu_table *iommu_table; /* for phb's or bridges */
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struct pci_dev *pcidev; /* back-pointer to the pci device */
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struct device_node *node; /* back-pointer to the device_node */
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#ifdef CONFIG_PPC_ISERIES
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struct list_head Device_List;
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int Irq; /* Assigned IRQ */
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int Flags; /* Possible flags(disable/bist)*/
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u8 LogicalSlot; /* Hv Slot Index for Tces */
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#endif
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u32 config_space[16]; /* saved PCI config space */
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};
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/* Get the pointer to a device_node's pci_dn */
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#define PCI_DN(dn) ((struct pci_dn *) (dn)->data)
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struct device_node *fetch_dev_dn(struct pci_dev *dev);
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/* Get a device_node from a pci_dev. This code must be fast except
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* in the case where the sysdata is incorrect and needs to be fixed
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* up (this will only happen once).
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* In this case the sysdata will have been inherited from a PCI host
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* bridge or a PCI-PCI bridge further up the tree, so it will point
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* to a valid struct pci_dn, just not the one we want.
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*/
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static inline struct device_node *pci_device_to_OF_node(struct pci_dev *dev)
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{
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struct device_node *dn = dev->sysdata;
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struct pci_dn *pdn = dn->data;
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if (pdn && pdn->devfn == dev->devfn && pdn->busno == dev->bus->number)
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return dn; /* fast path. sysdata is good */
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return fetch_dev_dn(dev);
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}
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static inline int pci_device_from_OF_node(struct device_node *np,
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u8 *bus, u8 *devfn)
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{
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if (!PCI_DN(np))
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return -ENODEV;
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*bus = PCI_DN(np)->busno;
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*devfn = PCI_DN(np)->devfn;
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return 0;
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}
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static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
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{
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if (bus->self)
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return pci_device_to_OF_node(bus->self);
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else
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return bus->sysdata; /* Must be root bus (PHB) */
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}
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extern void pci_process_bridge_OF_ranges(struct pci_controller *hose,
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struct device_node *dev, int primary);
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extern int pcibios_remove_root_bus(struct pci_controller *phb);
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extern void phbs_remap_io(void);
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static inline struct pci_controller *pci_bus_to_host(struct pci_bus *bus)
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{
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struct device_node *busdn = bus->sysdata;
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BUG_ON(busdn == NULL);
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return PCI_DN(busdn)->phb;
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}
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extern struct pci_controller *
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pcibios_alloc_controller(struct device_node *dev);
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extern void pcibios_free_controller(struct pci_controller *phb);
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/* Return values for ppc_md.pci_probe_mode function */
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#define PCI_PROBE_NONE -1 /* Don't look at this bus at all */
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#define PCI_PROBE_NORMAL 0 /* Do normal PCI probing */
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#define PCI_PROBE_DEVTREE 1 /* Instantiate from device tree */
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#endif
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#endif /* __KERNEL__ */
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