![Stephen Rothwell](/assets/img/avatar_default.png)
pcibios_claim_one_bus is not needed on iSeries and phbs_remap_io can be mode static. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
1443 lines
36 KiB
C
1443 lines
36 KiB
C
/*
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* Port for PPC64 David Engebretsen, IBM Corp.
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* Contains common pci routines for ppc64 platform, pSeries and iSeries brands.
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*
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* Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM
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* Rework, based on alpha PCI code.
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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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#undef DEBUG
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#include <linux/config.h>
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#include <linux/kernel.h>
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#include <linux/pci.h>
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#include <linux/string.h>
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#include <linux/init.h>
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#include <linux/bootmem.h>
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#include <linux/mm.h>
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#include <linux/list.h>
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#include <linux/syscalls.h>
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#include <asm/processor.h>
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#include <asm/io.h>
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#include <asm/prom.h>
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#include <asm/pci-bridge.h>
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#include <asm/byteorder.h>
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#include <asm/irq.h>
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#include <asm/machdep.h>
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#include <asm/ppc-pci.h>
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#ifdef DEBUG
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#include <asm/udbg.h>
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#define DBG(fmt...) printk(fmt)
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#else
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#define DBG(fmt...)
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#endif
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unsigned long pci_probe_only = 1;
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int pci_assign_all_buses = 0;
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/*
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* legal IO pages under MAX_ISA_PORT. This is to ensure we don't touch
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* devices we don't have access to.
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*/
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unsigned long io_page_mask;
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EXPORT_SYMBOL(io_page_mask);
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#ifdef CONFIG_PPC_MULTIPLATFORM
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static void fixup_resource(struct resource *res, struct pci_dev *dev);
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static void do_bus_setup(struct pci_bus *bus);
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static void phbs_remap_io(void);
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#endif
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/* pci_io_base -- the base address from which io bars are offsets.
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* This is the lowest I/O base address (so bar values are always positive),
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* and it *must* be the start of ISA space if an ISA bus exists because
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* ISA drivers use hard coded offsets. If no ISA bus exists a dummy
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* page is mapped and isa_io_limit prevents access to it.
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*/
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unsigned long isa_io_base; /* NULL if no ISA bus */
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EXPORT_SYMBOL(isa_io_base);
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unsigned long pci_io_base;
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EXPORT_SYMBOL(pci_io_base);
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void iSeries_pcibios_init(void);
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LIST_HEAD(hose_list);
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struct dma_mapping_ops pci_dma_ops;
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EXPORT_SYMBOL(pci_dma_ops);
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int global_phb_number; /* Global phb counter */
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/* Cached ISA bridge dev. */
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struct pci_dev *ppc64_isabridge_dev = NULL;
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static void fixup_broken_pcnet32(struct pci_dev* dev)
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{
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if ((dev->class>>8 == PCI_CLASS_NETWORK_ETHERNET)) {
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dev->vendor = PCI_VENDOR_ID_AMD;
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pci_write_config_word(dev, PCI_VENDOR_ID, PCI_VENDOR_ID_AMD);
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}
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}
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TRIDENT, PCI_ANY_ID, fixup_broken_pcnet32);
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void pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
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struct resource *res)
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{
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unsigned long offset = 0;
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struct pci_controller *hose = pci_bus_to_host(dev->bus);
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if (!hose)
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return;
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if (res->flags & IORESOURCE_IO)
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offset = (unsigned long)hose->io_base_virt - pci_io_base;
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if (res->flags & IORESOURCE_MEM)
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offset = hose->pci_mem_offset;
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region->start = res->start - offset;
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region->end = res->end - offset;
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}
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void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
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struct pci_bus_region *region)
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{
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unsigned long offset = 0;
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struct pci_controller *hose = pci_bus_to_host(dev->bus);
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if (!hose)
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return;
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if (res->flags & IORESOURCE_IO)
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offset = (unsigned long)hose->io_base_virt - pci_io_base;
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if (res->flags & IORESOURCE_MEM)
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offset = hose->pci_mem_offset;
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res->start = region->start + offset;
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res->end = region->end + offset;
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}
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#ifdef CONFIG_HOTPLUG
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EXPORT_SYMBOL(pcibios_resource_to_bus);
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EXPORT_SYMBOL(pcibios_bus_to_resource);
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#endif
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/*
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* We need to avoid collisions with `mirrored' VGA ports
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* and other strange ISA hardware, so we always want the
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* addresses to be allocated in the 0x000-0x0ff region
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* modulo 0x400.
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*
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* Why? Because some silly external IO cards only decode
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* the low 10 bits of the IO address. The 0x00-0xff region
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* is reserved for motherboard devices that decode all 16
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* bits, so it's ok to allocate at, say, 0x2800-0x28ff,
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* but we want to try to avoid allocating at 0x2900-0x2bff
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* which might have be mirrored at 0x0100-0x03ff..
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*/
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void pcibios_align_resource(void *data, struct resource *res,
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unsigned long size, unsigned long align)
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{
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struct pci_dev *dev = data;
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struct pci_controller *hose = pci_bus_to_host(dev->bus);
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unsigned long start = res->start;
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unsigned long alignto;
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if (res->flags & IORESOURCE_IO) {
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unsigned long offset = (unsigned long)hose->io_base_virt -
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pci_io_base;
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/* Make sure we start at our min on all hoses */
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if (start - offset < PCIBIOS_MIN_IO)
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start = PCIBIOS_MIN_IO + offset;
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/*
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* Put everything into 0x00-0xff region modulo 0x400
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*/
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if (start & 0x300)
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start = (start + 0x3ff) & ~0x3ff;
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} else if (res->flags & IORESOURCE_MEM) {
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/* Make sure we start at our min on all hoses */
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if (start - hose->pci_mem_offset < PCIBIOS_MIN_MEM)
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start = PCIBIOS_MIN_MEM + hose->pci_mem_offset;
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/* Align to multiple of size of minimum base. */
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alignto = max(0x1000UL, align);
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start = ALIGN(start, alignto);
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}
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res->start = start;
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}
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static DEFINE_SPINLOCK(hose_spinlock);
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/*
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* pci_controller(phb) initialized common variables.
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*/
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static void __devinit pci_setup_pci_controller(struct pci_controller *hose)
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{
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memset(hose, 0, sizeof(struct pci_controller));
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spin_lock(&hose_spinlock);
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hose->global_number = global_phb_number++;
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list_add_tail(&hose->list_node, &hose_list);
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spin_unlock(&hose_spinlock);
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}
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static void add_linux_pci_domain(struct device_node *dev,
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struct pci_controller *phb)
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{
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struct property *of_prop;
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unsigned int size;
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of_prop = (struct property *)
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get_property(dev, "linux,pci-domain", &size);
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if (of_prop != NULL)
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return;
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WARN_ON(of_prop && size < sizeof(int));
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if (of_prop && size < sizeof(int))
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of_prop = NULL;
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size = sizeof(struct property) + sizeof(int);
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if (of_prop == NULL) {
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if (mem_init_done)
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of_prop = kmalloc(size, GFP_KERNEL);
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else
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of_prop = alloc_bootmem(size);
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}
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memset(of_prop, 0, sizeof(struct property));
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of_prop->name = "linux,pci-domain";
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of_prop->length = sizeof(int);
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of_prop->value = (unsigned char *)&of_prop[1];
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*((int *)of_prop->value) = phb->global_number;
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prom_add_property(dev, of_prop);
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}
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struct pci_controller * pcibios_alloc_controller(struct device_node *dev)
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{
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struct pci_controller *phb;
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if (mem_init_done)
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phb = kmalloc(sizeof(struct pci_controller), GFP_KERNEL);
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else
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phb = alloc_bootmem(sizeof (struct pci_controller));
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if (phb == NULL)
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return NULL;
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pci_setup_pci_controller(phb);
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phb->arch_data = dev;
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phb->is_dynamic = mem_init_done;
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if (dev)
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add_linux_pci_domain(dev, phb);
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return phb;
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}
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void pcibios_free_controller(struct pci_controller *phb)
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{
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if (phb->arch_data) {
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struct device_node *np = phb->arch_data;
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int *domain = (int *)get_property(np,
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"linux,pci-domain", NULL);
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if (domain)
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*domain = -1;
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}
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if (phb->is_dynamic)
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kfree(phb);
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}
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#ifndef CONFIG_PPC_ISERIES
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void __devinit pcibios_claim_one_bus(struct pci_bus *b)
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{
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struct pci_dev *dev;
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struct pci_bus *child_bus;
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list_for_each_entry(dev, &b->devices, bus_list) {
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int i;
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for (i = 0; i < PCI_NUM_RESOURCES; i++) {
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struct resource *r = &dev->resource[i];
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if (r->parent || !r->start || !r->flags)
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continue;
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pci_claim_resource(dev, i);
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}
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}
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list_for_each_entry(child_bus, &b->children, node)
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pcibios_claim_one_bus(child_bus);
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}
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#ifdef CONFIG_HOTPLUG
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EXPORT_SYMBOL_GPL(pcibios_claim_one_bus);
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#endif
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static void __init pcibios_claim_of_setup(void)
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{
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struct pci_bus *b;
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list_for_each_entry(b, &pci_root_buses, node)
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pcibios_claim_one_bus(b);
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}
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#endif
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#ifdef CONFIG_PPC_MULTIPLATFORM
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static u32 get_int_prop(struct device_node *np, const char *name, u32 def)
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{
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u32 *prop;
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int len;
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prop = (u32 *) get_property(np, name, &len);
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if (prop && len >= 4)
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return *prop;
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return def;
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}
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static unsigned int pci_parse_of_flags(u32 addr0)
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{
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unsigned int flags = 0;
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if (addr0 & 0x02000000) {
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flags = IORESOURCE_MEM | PCI_BASE_ADDRESS_SPACE_MEMORY;
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flags |= (addr0 >> 22) & PCI_BASE_ADDRESS_MEM_TYPE_64;
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flags |= (addr0 >> 28) & PCI_BASE_ADDRESS_MEM_TYPE_1M;
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if (addr0 & 0x40000000)
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flags |= IORESOURCE_PREFETCH
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| PCI_BASE_ADDRESS_MEM_PREFETCH;
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} else if (addr0 & 0x01000000)
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flags = IORESOURCE_IO | PCI_BASE_ADDRESS_SPACE_IO;
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return flags;
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}
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#define GET_64BIT(prop, i) ((((u64) (prop)[(i)]) << 32) | (prop)[(i)+1])
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static void pci_parse_of_addrs(struct device_node *node, struct pci_dev *dev)
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{
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u64 base, size;
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unsigned int flags;
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struct resource *res;
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u32 *addrs, i;
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int proplen;
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addrs = (u32 *) get_property(node, "assigned-addresses", &proplen);
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if (!addrs)
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return;
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DBG(" parse addresses (%d bytes) @ %p\n", proplen, addrs);
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for (; proplen >= 20; proplen -= 20, addrs += 5) {
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flags = pci_parse_of_flags(addrs[0]);
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if (!flags)
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continue;
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base = GET_64BIT(addrs, 1);
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size = GET_64BIT(addrs, 3);
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if (!size)
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continue;
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i = addrs[0] & 0xff;
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DBG(" base: %llx, size: %llx, i: %x\n",
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(unsigned long long)base, (unsigned long long)size, i);
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if (PCI_BASE_ADDRESS_0 <= i && i <= PCI_BASE_ADDRESS_5) {
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res = &dev->resource[(i - PCI_BASE_ADDRESS_0) >> 2];
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} else if (i == dev->rom_base_reg) {
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res = &dev->resource[PCI_ROM_RESOURCE];
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flags |= IORESOURCE_READONLY | IORESOURCE_CACHEABLE;
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} else {
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printk(KERN_ERR "PCI: bad cfg reg num 0x%x\n", i);
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continue;
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}
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res->start = base;
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res->end = base + size - 1;
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res->flags = flags;
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res->name = pci_name(dev);
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fixup_resource(res, dev);
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}
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}
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struct pci_dev *of_create_pci_dev(struct device_node *node,
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struct pci_bus *bus, int devfn)
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{
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struct pci_dev *dev;
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const char *type;
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dev = kmalloc(sizeof(struct pci_dev), GFP_KERNEL);
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if (!dev)
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return NULL;
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type = get_property(node, "device_type", NULL);
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if (type == NULL)
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type = "";
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DBG(" create device, devfn: %x, type: %s\n", devfn, type);
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memset(dev, 0, sizeof(struct pci_dev));
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dev->bus = bus;
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dev->sysdata = node;
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dev->dev.parent = bus->bridge;
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dev->dev.bus = &pci_bus_type;
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dev->devfn = devfn;
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dev->multifunction = 0; /* maybe a lie? */
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dev->vendor = get_int_prop(node, "vendor-id", 0xffff);
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dev->device = get_int_prop(node, "device-id", 0xffff);
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dev->subsystem_vendor = get_int_prop(node, "subsystem-vendor-id", 0);
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dev->subsystem_device = get_int_prop(node, "subsystem-id", 0);
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dev->cfg_size = pci_cfg_space_size(dev);
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sprintf(pci_name(dev), "%04x:%02x:%02x.%d", pci_domain_nr(bus),
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dev->bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn));
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dev->class = get_int_prop(node, "class-code", 0);
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DBG(" class: 0x%x\n", dev->class);
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dev->current_state = 4; /* unknown power state */
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if (!strcmp(type, "pci")) {
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/* a PCI-PCI bridge */
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dev->hdr_type = PCI_HEADER_TYPE_BRIDGE;
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dev->rom_base_reg = PCI_ROM_ADDRESS1;
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} else if (!strcmp(type, "cardbus")) {
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dev->hdr_type = PCI_HEADER_TYPE_CARDBUS;
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} else {
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dev->hdr_type = PCI_HEADER_TYPE_NORMAL;
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dev->rom_base_reg = PCI_ROM_ADDRESS;
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dev->irq = NO_IRQ;
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if (node->n_intrs > 0) {
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dev->irq = node->intrs[0].line;
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pci_write_config_byte(dev, PCI_INTERRUPT_LINE,
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dev->irq);
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}
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}
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pci_parse_of_addrs(node, dev);
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DBG(" adding to system ...\n");
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pci_device_add(dev, bus);
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/* XXX pci_scan_msi_device(dev); */
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return dev;
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}
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EXPORT_SYMBOL(of_create_pci_dev);
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void __devinit of_scan_bus(struct device_node *node,
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struct pci_bus *bus)
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{
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struct device_node *child = NULL;
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u32 *reg;
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int reglen, devfn;
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struct pci_dev *dev;
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DBG("of_scan_bus(%s) bus no %d... \n", node->full_name, bus->number);
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while ((child = of_get_next_child(node, child)) != NULL) {
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DBG(" * %s\n", child->full_name);
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reg = (u32 *) get_property(child, "reg", ®len);
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if (reg == NULL || reglen < 20)
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continue;
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devfn = (reg[0] >> 8) & 0xff;
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/* create a new pci_dev for this device */
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dev = of_create_pci_dev(child, bus, devfn);
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if (!dev)
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continue;
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DBG("dev header type: %x\n", dev->hdr_type);
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if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
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dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
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of_scan_pci_bridge(child, dev);
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}
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do_bus_setup(bus);
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}
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EXPORT_SYMBOL(of_scan_bus);
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void __devinit of_scan_pci_bridge(struct device_node *node,
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struct pci_dev *dev)
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{
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struct pci_bus *bus;
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u32 *busrange, *ranges;
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int len, i, mode;
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struct resource *res;
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unsigned int flags;
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u64 size;
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DBG("of_scan_pci_bridge(%s)\n", node->full_name);
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/* parse bus-range property */
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busrange = (u32 *) get_property(node, "bus-range", &len);
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if (busrange == NULL || len != 8) {
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printk(KERN_DEBUG "Can't get bus-range for PCI-PCI bridge %s\n",
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node->full_name);
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return;
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}
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ranges = (u32 *) get_property(node, "ranges", &len);
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if (ranges == NULL) {
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printk(KERN_DEBUG "Can't get ranges for PCI-PCI bridge %s\n",
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node->full_name);
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return;
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}
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bus = pci_add_new_bus(dev->bus, dev, busrange[0]);
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if (!bus) {
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printk(KERN_ERR "Failed to create pci bus for %s\n",
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node->full_name);
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return;
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}
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bus->primary = dev->bus->number;
|
|
bus->subordinate = busrange[1];
|
|
bus->bridge_ctl = 0;
|
|
bus->sysdata = node;
|
|
|
|
/* parse ranges property */
|
|
/* PCI #address-cells == 3 and #size-cells == 2 always */
|
|
res = &dev->resource[PCI_BRIDGE_RESOURCES];
|
|
for (i = 0; i < PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES; ++i) {
|
|
res->flags = 0;
|
|
bus->resource[i] = res;
|
|
++res;
|
|
}
|
|
i = 1;
|
|
for (; len >= 32; len -= 32, ranges += 8) {
|
|
flags = pci_parse_of_flags(ranges[0]);
|
|
size = GET_64BIT(ranges, 6);
|
|
if (flags == 0 || size == 0)
|
|
continue;
|
|
if (flags & IORESOURCE_IO) {
|
|
res = bus->resource[0];
|
|
if (res->flags) {
|
|
printk(KERN_ERR "PCI: ignoring extra I/O range"
|
|
" for bridge %s\n", node->full_name);
|
|
continue;
|
|
}
|
|
} else {
|
|
if (i >= PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES) {
|
|
printk(KERN_ERR "PCI: too many memory ranges"
|
|
" for bridge %s\n", node->full_name);
|
|
continue;
|
|
}
|
|
res = bus->resource[i];
|
|
++i;
|
|
}
|
|
res->start = GET_64BIT(ranges, 1);
|
|
res->end = res->start + size - 1;
|
|
res->flags = flags;
|
|
fixup_resource(res, dev);
|
|
}
|
|
sprintf(bus->name, "PCI Bus %04x:%02x", pci_domain_nr(bus),
|
|
bus->number);
|
|
DBG(" bus name: %s\n", bus->name);
|
|
|
|
mode = PCI_PROBE_NORMAL;
|
|
if (ppc_md.pci_probe_mode)
|
|
mode = ppc_md.pci_probe_mode(bus);
|
|
DBG(" probe mode: %d\n", mode);
|
|
|
|
if (mode == PCI_PROBE_DEVTREE)
|
|
of_scan_bus(node, bus);
|
|
else if (mode == PCI_PROBE_NORMAL)
|
|
pci_scan_child_bus(bus);
|
|
}
|
|
EXPORT_SYMBOL(of_scan_pci_bridge);
|
|
#endif /* CONFIG_PPC_MULTIPLATFORM */
|
|
|
|
void __devinit scan_phb(struct pci_controller *hose)
|
|
{
|
|
struct pci_bus *bus;
|
|
struct device_node *node = hose->arch_data;
|
|
int i, mode;
|
|
struct resource *res;
|
|
|
|
DBG("Scanning PHB %s\n", node ? node->full_name : "<NO NAME>");
|
|
|
|
bus = pci_create_bus(NULL, hose->first_busno, hose->ops, node);
|
|
if (bus == NULL) {
|
|
printk(KERN_ERR "Failed to create bus for PCI domain %04x\n",
|
|
hose->global_number);
|
|
return;
|
|
}
|
|
bus->secondary = hose->first_busno;
|
|
hose->bus = bus;
|
|
|
|
bus->resource[0] = res = &hose->io_resource;
|
|
if (res->flags && request_resource(&ioport_resource, res))
|
|
printk(KERN_ERR "Failed to request PCI IO region "
|
|
"on PCI domain %04x\n", hose->global_number);
|
|
|
|
for (i = 0; i < 3; ++i) {
|
|
res = &hose->mem_resources[i];
|
|
bus->resource[i+1] = res;
|
|
if (res->flags && request_resource(&iomem_resource, res))
|
|
printk(KERN_ERR "Failed to request PCI memory region "
|
|
"on PCI domain %04x\n", hose->global_number);
|
|
}
|
|
|
|
mode = PCI_PROBE_NORMAL;
|
|
#ifdef CONFIG_PPC_MULTIPLATFORM
|
|
if (node && ppc_md.pci_probe_mode)
|
|
mode = ppc_md.pci_probe_mode(bus);
|
|
DBG(" probe mode: %d\n", mode);
|
|
if (mode == PCI_PROBE_DEVTREE) {
|
|
bus->subordinate = hose->last_busno;
|
|
of_scan_bus(node, bus);
|
|
}
|
|
#endif /* CONFIG_PPC_MULTIPLATFORM */
|
|
if (mode == PCI_PROBE_NORMAL)
|
|
hose->last_busno = bus->subordinate = pci_scan_child_bus(bus);
|
|
pci_bus_add_devices(bus);
|
|
}
|
|
|
|
static int __init pcibios_init(void)
|
|
{
|
|
struct pci_controller *hose, *tmp;
|
|
|
|
/* For now, override phys_mem_access_prot. If we need it,
|
|
* later, we may move that initialization to each ppc_md
|
|
*/
|
|
ppc_md.phys_mem_access_prot = pci_phys_mem_access_prot;
|
|
|
|
#ifdef CONFIG_PPC_ISERIES
|
|
iSeries_pcibios_init();
|
|
#endif
|
|
|
|
printk("PCI: Probing PCI hardware\n");
|
|
|
|
/* Scan all of the recorded PCI controllers. */
|
|
list_for_each_entry_safe(hose, tmp, &hose_list, list_node)
|
|
scan_phb(hose);
|
|
|
|
#ifndef CONFIG_PPC_ISERIES
|
|
if (pci_probe_only)
|
|
pcibios_claim_of_setup();
|
|
else
|
|
/* FIXME: `else' will be removed when
|
|
pci_assign_unassigned_resources() is able to work
|
|
correctly with [partially] allocated PCI tree. */
|
|
pci_assign_unassigned_resources();
|
|
#endif /* !CONFIG_PPC_ISERIES */
|
|
|
|
/* Call machine dependent final fixup */
|
|
if (ppc_md.pcibios_fixup)
|
|
ppc_md.pcibios_fixup();
|
|
|
|
/* Cache the location of the ISA bridge (if we have one) */
|
|
ppc64_isabridge_dev = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, NULL);
|
|
if (ppc64_isabridge_dev != NULL)
|
|
printk("ISA bridge at %s\n", pci_name(ppc64_isabridge_dev));
|
|
|
|
#ifdef CONFIG_PPC_MULTIPLATFORM
|
|
/* map in PCI I/O space */
|
|
phbs_remap_io();
|
|
#endif
|
|
|
|
printk("PCI: Probing PCI hardware done\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
subsys_initcall(pcibios_init);
|
|
|
|
char __init *pcibios_setup(char *str)
|
|
{
|
|
return str;
|
|
}
|
|
|
|
int pcibios_enable_device(struct pci_dev *dev, int mask)
|
|
{
|
|
u16 cmd, oldcmd;
|
|
int i;
|
|
|
|
pci_read_config_word(dev, PCI_COMMAND, &cmd);
|
|
oldcmd = cmd;
|
|
|
|
for (i = 0; i < PCI_NUM_RESOURCES; i++) {
|
|
struct resource *res = &dev->resource[i];
|
|
|
|
/* Only set up the requested stuff */
|
|
if (!(mask & (1<<i)))
|
|
continue;
|
|
|
|
if (res->flags & IORESOURCE_IO)
|
|
cmd |= PCI_COMMAND_IO;
|
|
if (res->flags & IORESOURCE_MEM)
|
|
cmd |= PCI_COMMAND_MEMORY;
|
|
}
|
|
|
|
if (cmd != oldcmd) {
|
|
printk(KERN_DEBUG "PCI: Enabling device: (%s), cmd %x\n",
|
|
pci_name(dev), cmd);
|
|
/* Enable the appropriate bits in the PCI command register. */
|
|
pci_write_config_word(dev, PCI_COMMAND, cmd);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Return the domain number for this bus.
|
|
*/
|
|
int pci_domain_nr(struct pci_bus *bus)
|
|
{
|
|
#ifdef CONFIG_PPC_ISERIES
|
|
return 0;
|
|
#else
|
|
struct pci_controller *hose = pci_bus_to_host(bus);
|
|
|
|
return hose->global_number;
|
|
#endif
|
|
}
|
|
|
|
EXPORT_SYMBOL(pci_domain_nr);
|
|
|
|
/* Decide whether to display the domain number in /proc */
|
|
int pci_proc_domain(struct pci_bus *bus)
|
|
{
|
|
#ifdef CONFIG_PPC_ISERIES
|
|
return 0;
|
|
#else
|
|
struct pci_controller *hose = pci_bus_to_host(bus);
|
|
return hose->buid;
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Platform support for /proc/bus/pci/X/Y mmap()s,
|
|
* modelled on the sparc64 implementation by Dave Miller.
|
|
* -- paulus.
|
|
*/
|
|
|
|
/*
|
|
* Adjust vm_pgoff of VMA such that it is the physical page offset
|
|
* corresponding to the 32-bit pci bus offset for DEV requested by the user.
|
|
*
|
|
* Basically, the user finds the base address for his device which he wishes
|
|
* to mmap. They read the 32-bit value from the config space base register,
|
|
* add whatever PAGE_SIZE multiple offset they wish, and feed this into the
|
|
* offset parameter of mmap on /proc/bus/pci/XXX for that device.
|
|
*
|
|
* Returns negative error code on failure, zero on success.
|
|
*/
|
|
static struct resource *__pci_mmap_make_offset(struct pci_dev *dev,
|
|
unsigned long *offset,
|
|
enum pci_mmap_state mmap_state)
|
|
{
|
|
struct pci_controller *hose = pci_bus_to_host(dev->bus);
|
|
unsigned long io_offset = 0;
|
|
int i, res_bit;
|
|
|
|
if (hose == 0)
|
|
return NULL; /* should never happen */
|
|
|
|
/* If memory, add on the PCI bridge address offset */
|
|
if (mmap_state == pci_mmap_mem) {
|
|
*offset += hose->pci_mem_offset;
|
|
res_bit = IORESOURCE_MEM;
|
|
} else {
|
|
io_offset = (unsigned long)hose->io_base_virt - pci_io_base;
|
|
*offset += io_offset;
|
|
res_bit = IORESOURCE_IO;
|
|
}
|
|
|
|
/*
|
|
* Check that the offset requested corresponds to one of the
|
|
* resources of the device.
|
|
*/
|
|
for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
|
|
struct resource *rp = &dev->resource[i];
|
|
int flags = rp->flags;
|
|
|
|
/* treat ROM as memory (should be already) */
|
|
if (i == PCI_ROM_RESOURCE)
|
|
flags |= IORESOURCE_MEM;
|
|
|
|
/* Active and same type? */
|
|
if ((flags & res_bit) == 0)
|
|
continue;
|
|
|
|
/* In the range of this resource? */
|
|
if (*offset < (rp->start & PAGE_MASK) || *offset > rp->end)
|
|
continue;
|
|
|
|
/* found it! construct the final physical address */
|
|
if (mmap_state == pci_mmap_io)
|
|
*offset += hose->io_base_phys - io_offset;
|
|
return rp;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Set vm_page_prot of VMA, as appropriate for this architecture, for a pci
|
|
* device mapping.
|
|
*/
|
|
static pgprot_t __pci_mmap_set_pgprot(struct pci_dev *dev, struct resource *rp,
|
|
pgprot_t protection,
|
|
enum pci_mmap_state mmap_state,
|
|
int write_combine)
|
|
{
|
|
unsigned long prot = pgprot_val(protection);
|
|
|
|
/* Write combine is always 0 on non-memory space mappings. On
|
|
* memory space, if the user didn't pass 1, we check for a
|
|
* "prefetchable" resource. This is a bit hackish, but we use
|
|
* this to workaround the inability of /sysfs to provide a write
|
|
* combine bit
|
|
*/
|
|
if (mmap_state != pci_mmap_mem)
|
|
write_combine = 0;
|
|
else if (write_combine == 0) {
|
|
if (rp->flags & IORESOURCE_PREFETCH)
|
|
write_combine = 1;
|
|
}
|
|
|
|
/* XXX would be nice to have a way to ask for write-through */
|
|
prot |= _PAGE_NO_CACHE;
|
|
if (write_combine)
|
|
prot &= ~_PAGE_GUARDED;
|
|
else
|
|
prot |= _PAGE_GUARDED;
|
|
|
|
printk("PCI map for %s:%lx, prot: %lx\n", pci_name(dev), rp->start,
|
|
prot);
|
|
|
|
return __pgprot(prot);
|
|
}
|
|
|
|
/*
|
|
* This one is used by /dev/mem and fbdev who have no clue about the
|
|
* PCI device, it tries to find the PCI device first and calls the
|
|
* above routine
|
|
*/
|
|
pgprot_t pci_phys_mem_access_prot(struct file *file,
|
|
unsigned long pfn,
|
|
unsigned long size,
|
|
pgprot_t protection)
|
|
{
|
|
struct pci_dev *pdev = NULL;
|
|
struct resource *found = NULL;
|
|
unsigned long prot = pgprot_val(protection);
|
|
unsigned long offset = pfn << PAGE_SHIFT;
|
|
int i;
|
|
|
|
if (page_is_ram(pfn))
|
|
return __pgprot(prot);
|
|
|
|
prot |= _PAGE_NO_CACHE | _PAGE_GUARDED;
|
|
|
|
for_each_pci_dev(pdev) {
|
|
for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
|
|
struct resource *rp = &pdev->resource[i];
|
|
int flags = rp->flags;
|
|
|
|
/* Active and same type? */
|
|
if ((flags & IORESOURCE_MEM) == 0)
|
|
continue;
|
|
/* In the range of this resource? */
|
|
if (offset < (rp->start & PAGE_MASK) ||
|
|
offset > rp->end)
|
|
continue;
|
|
found = rp;
|
|
break;
|
|
}
|
|
if (found)
|
|
break;
|
|
}
|
|
if (found) {
|
|
if (found->flags & IORESOURCE_PREFETCH)
|
|
prot &= ~_PAGE_GUARDED;
|
|
pci_dev_put(pdev);
|
|
}
|
|
|
|
DBG("non-PCI map for %lx, prot: %lx\n", offset, prot);
|
|
|
|
return __pgprot(prot);
|
|
}
|
|
|
|
|
|
/*
|
|
* Perform the actual remap of the pages for a PCI device mapping, as
|
|
* appropriate for this architecture. The region in the process to map
|
|
* is described by vm_start and vm_end members of VMA, the base physical
|
|
* address is found in vm_pgoff.
|
|
* The pci device structure is provided so that architectures may make mapping
|
|
* decisions on a per-device or per-bus basis.
|
|
*
|
|
* Returns a negative error code on failure, zero on success.
|
|
*/
|
|
int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
|
|
enum pci_mmap_state mmap_state, int write_combine)
|
|
{
|
|
unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
|
|
struct resource *rp;
|
|
int ret;
|
|
|
|
rp = __pci_mmap_make_offset(dev, &offset, mmap_state);
|
|
if (rp == NULL)
|
|
return -EINVAL;
|
|
|
|
vma->vm_pgoff = offset >> PAGE_SHIFT;
|
|
vma->vm_flags |= VM_SHM | VM_LOCKED | VM_IO;
|
|
vma->vm_page_prot = __pci_mmap_set_pgprot(dev, rp,
|
|
vma->vm_page_prot,
|
|
mmap_state, write_combine);
|
|
|
|
ret = remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
|
|
vma->vm_end - vma->vm_start, vma->vm_page_prot);
|
|
|
|
return ret;
|
|
}
|
|
|
|
#ifdef CONFIG_PPC_MULTIPLATFORM
|
|
static ssize_t pci_show_devspec(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct pci_dev *pdev;
|
|
struct device_node *np;
|
|
|
|
pdev = to_pci_dev (dev);
|
|
np = pci_device_to_OF_node(pdev);
|
|
if (np == NULL || np->full_name == NULL)
|
|
return 0;
|
|
return sprintf(buf, "%s", np->full_name);
|
|
}
|
|
static DEVICE_ATTR(devspec, S_IRUGO, pci_show_devspec, NULL);
|
|
#endif /* CONFIG_PPC_MULTIPLATFORM */
|
|
|
|
void pcibios_add_platform_entries(struct pci_dev *pdev)
|
|
{
|
|
#ifdef CONFIG_PPC_MULTIPLATFORM
|
|
device_create_file(&pdev->dev, &dev_attr_devspec);
|
|
#endif /* CONFIG_PPC_MULTIPLATFORM */
|
|
}
|
|
|
|
#ifdef CONFIG_PPC_MULTIPLATFORM
|
|
|
|
#define ISA_SPACE_MASK 0x1
|
|
#define ISA_SPACE_IO 0x1
|
|
|
|
static void __devinit pci_process_ISA_OF_ranges(struct device_node *isa_node,
|
|
unsigned long phb_io_base_phys,
|
|
void __iomem * phb_io_base_virt)
|
|
{
|
|
/* Remove these asap */
|
|
|
|
struct pci_address {
|
|
u32 a_hi;
|
|
u32 a_mid;
|
|
u32 a_lo;
|
|
};
|
|
|
|
struct isa_address {
|
|
u32 a_hi;
|
|
u32 a_lo;
|
|
};
|
|
|
|
struct isa_range {
|
|
struct isa_address isa_addr;
|
|
struct pci_address pci_addr;
|
|
unsigned int size;
|
|
};
|
|
|
|
struct isa_range *range;
|
|
unsigned long pci_addr;
|
|
unsigned int isa_addr;
|
|
unsigned int size;
|
|
int rlen = 0;
|
|
|
|
range = (struct isa_range *) get_property(isa_node, "ranges", &rlen);
|
|
if (range == NULL || (rlen < sizeof(struct isa_range))) {
|
|
printk(KERN_ERR "no ISA ranges or unexpected isa range size,"
|
|
"mapping 64k\n");
|
|
__ioremap_explicit(phb_io_base_phys,
|
|
(unsigned long)phb_io_base_virt,
|
|
0x10000, _PAGE_NO_CACHE | _PAGE_GUARDED);
|
|
return;
|
|
}
|
|
|
|
/* From "ISA Binding to 1275"
|
|
* The ranges property is laid out as an array of elements,
|
|
* each of which comprises:
|
|
* cells 0 - 1: an ISA address
|
|
* cells 2 - 4: a PCI address
|
|
* (size depending on dev->n_addr_cells)
|
|
* cell 5: the size of the range
|
|
*/
|
|
if ((range->isa_addr.a_hi && ISA_SPACE_MASK) == ISA_SPACE_IO) {
|
|
isa_addr = range->isa_addr.a_lo;
|
|
pci_addr = (unsigned long) range->pci_addr.a_mid << 32 |
|
|
range->pci_addr.a_lo;
|
|
|
|
/* Assume these are both zero */
|
|
if ((pci_addr != 0) || (isa_addr != 0)) {
|
|
printk(KERN_ERR "unexpected isa to pci mapping: %s\n",
|
|
__FUNCTION__);
|
|
return;
|
|
}
|
|
|
|
size = PAGE_ALIGN(range->size);
|
|
|
|
__ioremap_explicit(phb_io_base_phys,
|
|
(unsigned long) phb_io_base_virt,
|
|
size, _PAGE_NO_CACHE | _PAGE_GUARDED);
|
|
}
|
|
}
|
|
|
|
void __devinit pci_process_bridge_OF_ranges(struct pci_controller *hose,
|
|
struct device_node *dev, int prim)
|
|
{
|
|
unsigned int *ranges, pci_space;
|
|
unsigned long size;
|
|
int rlen = 0;
|
|
int memno = 0;
|
|
struct resource *res;
|
|
int np, na = prom_n_addr_cells(dev);
|
|
unsigned long pci_addr, cpu_phys_addr;
|
|
|
|
np = na + 5;
|
|
|
|
/* From "PCI Binding to 1275"
|
|
* The ranges property is laid out as an array of elements,
|
|
* each of which comprises:
|
|
* cells 0 - 2: a PCI address
|
|
* cells 3 or 3+4: a CPU physical address
|
|
* (size depending on dev->n_addr_cells)
|
|
* cells 4+5 or 5+6: the size of the range
|
|
*/
|
|
ranges = (unsigned int *) get_property(dev, "ranges", &rlen);
|
|
if (ranges == NULL)
|
|
return;
|
|
hose->io_base_phys = 0;
|
|
while ((rlen -= np * sizeof(unsigned int)) >= 0) {
|
|
res = NULL;
|
|
pci_space = ranges[0];
|
|
pci_addr = ((unsigned long)ranges[1] << 32) | ranges[2];
|
|
|
|
cpu_phys_addr = ranges[3];
|
|
if (na >= 2)
|
|
cpu_phys_addr = (cpu_phys_addr << 32) | ranges[4];
|
|
|
|
size = ((unsigned long)ranges[na+3] << 32) | ranges[na+4];
|
|
ranges += np;
|
|
if (size == 0)
|
|
continue;
|
|
|
|
/* Now consume following elements while they are contiguous */
|
|
while (rlen >= np * sizeof(unsigned int)) {
|
|
unsigned long addr, phys;
|
|
|
|
if (ranges[0] != pci_space)
|
|
break;
|
|
addr = ((unsigned long)ranges[1] << 32) | ranges[2];
|
|
phys = ranges[3];
|
|
if (na >= 2)
|
|
phys = (phys << 32) | ranges[4];
|
|
if (addr != pci_addr + size ||
|
|
phys != cpu_phys_addr + size)
|
|
break;
|
|
|
|
size += ((unsigned long)ranges[na+3] << 32)
|
|
| ranges[na+4];
|
|
ranges += np;
|
|
rlen -= np * sizeof(unsigned int);
|
|
}
|
|
|
|
switch ((pci_space >> 24) & 0x3) {
|
|
case 1: /* I/O space */
|
|
hose->io_base_phys = cpu_phys_addr;
|
|
hose->pci_io_size = size;
|
|
|
|
res = &hose->io_resource;
|
|
res->flags = IORESOURCE_IO;
|
|
res->start = pci_addr;
|
|
DBG("phb%d: IO 0x%lx -> 0x%lx\n", hose->global_number,
|
|
res->start, res->start + size - 1);
|
|
break;
|
|
case 2: /* memory space */
|
|
memno = 0;
|
|
while (memno < 3 && hose->mem_resources[memno].flags)
|
|
++memno;
|
|
|
|
if (memno == 0)
|
|
hose->pci_mem_offset = cpu_phys_addr - pci_addr;
|
|
if (memno < 3) {
|
|
res = &hose->mem_resources[memno];
|
|
res->flags = IORESOURCE_MEM;
|
|
res->start = cpu_phys_addr;
|
|
DBG("phb%d: MEM 0x%lx -> 0x%lx\n", hose->global_number,
|
|
res->start, res->start + size - 1);
|
|
}
|
|
break;
|
|
}
|
|
if (res != NULL) {
|
|
res->name = dev->full_name;
|
|
res->end = res->start + size - 1;
|
|
res->parent = NULL;
|
|
res->sibling = NULL;
|
|
res->child = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
void __init pci_setup_phb_io(struct pci_controller *hose, int primary)
|
|
{
|
|
unsigned long size = hose->pci_io_size;
|
|
unsigned long io_virt_offset;
|
|
struct resource *res;
|
|
struct device_node *isa_dn;
|
|
|
|
hose->io_base_virt = reserve_phb_iospace(size);
|
|
DBG("phb%d io_base_phys 0x%lx io_base_virt 0x%lx\n",
|
|
hose->global_number, hose->io_base_phys,
|
|
(unsigned long) hose->io_base_virt);
|
|
|
|
if (primary) {
|
|
pci_io_base = (unsigned long)hose->io_base_virt;
|
|
isa_dn = of_find_node_by_type(NULL, "isa");
|
|
if (isa_dn) {
|
|
isa_io_base = pci_io_base;
|
|
pci_process_ISA_OF_ranges(isa_dn, hose->io_base_phys,
|
|
hose->io_base_virt);
|
|
of_node_put(isa_dn);
|
|
/* Allow all IO */
|
|
io_page_mask = -1;
|
|
}
|
|
}
|
|
|
|
io_virt_offset = (unsigned long)hose->io_base_virt - pci_io_base;
|
|
res = &hose->io_resource;
|
|
res->start += io_virt_offset;
|
|
res->end += io_virt_offset;
|
|
}
|
|
|
|
void __devinit pci_setup_phb_io_dynamic(struct pci_controller *hose,
|
|
int primary)
|
|
{
|
|
unsigned long size = hose->pci_io_size;
|
|
unsigned long io_virt_offset;
|
|
struct resource *res;
|
|
|
|
hose->io_base_virt = __ioremap(hose->io_base_phys, size,
|
|
_PAGE_NO_CACHE | _PAGE_GUARDED);
|
|
DBG("phb%d io_base_phys 0x%lx io_base_virt 0x%lx\n",
|
|
hose->global_number, hose->io_base_phys,
|
|
(unsigned long) hose->io_base_virt);
|
|
|
|
if (primary)
|
|
pci_io_base = (unsigned long)hose->io_base_virt;
|
|
|
|
io_virt_offset = (unsigned long)hose->io_base_virt - pci_io_base;
|
|
res = &hose->io_resource;
|
|
res->start += io_virt_offset;
|
|
res->end += io_virt_offset;
|
|
}
|
|
|
|
|
|
static int get_bus_io_range(struct pci_bus *bus, unsigned long *start_phys,
|
|
unsigned long *start_virt, unsigned long *size)
|
|
{
|
|
struct pci_controller *hose = pci_bus_to_host(bus);
|
|
struct pci_bus_region region;
|
|
struct resource *res;
|
|
|
|
if (bus->self) {
|
|
res = bus->resource[0];
|
|
pcibios_resource_to_bus(bus->self, ®ion, res);
|
|
*start_phys = hose->io_base_phys + region.start;
|
|
*start_virt = (unsigned long) hose->io_base_virt +
|
|
region.start;
|
|
if (region.end > region.start)
|
|
*size = region.end - region.start + 1;
|
|
else {
|
|
printk("%s(): unexpected region 0x%lx->0x%lx\n",
|
|
__FUNCTION__, region.start, region.end);
|
|
return 1;
|
|
}
|
|
|
|
} else {
|
|
/* Root Bus */
|
|
res = &hose->io_resource;
|
|
*start_phys = hose->io_base_phys;
|
|
*start_virt = (unsigned long) hose->io_base_virt;
|
|
if (res->end > res->start)
|
|
*size = res->end - res->start + 1;
|
|
else {
|
|
printk("%s(): unexpected region 0x%lx->0x%lx\n",
|
|
__FUNCTION__, res->start, res->end);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int unmap_bus_range(struct pci_bus *bus)
|
|
{
|
|
unsigned long start_phys;
|
|
unsigned long start_virt;
|
|
unsigned long size;
|
|
|
|
if (!bus) {
|
|
printk(KERN_ERR "%s() expected bus\n", __FUNCTION__);
|
|
return 1;
|
|
}
|
|
|
|
if (get_bus_io_range(bus, &start_phys, &start_virt, &size))
|
|
return 1;
|
|
if (iounmap_explicit((void __iomem *) start_virt, size))
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(unmap_bus_range);
|
|
|
|
int remap_bus_range(struct pci_bus *bus)
|
|
{
|
|
unsigned long start_phys;
|
|
unsigned long start_virt;
|
|
unsigned long size;
|
|
|
|
if (!bus) {
|
|
printk(KERN_ERR "%s() expected bus\n", __FUNCTION__);
|
|
return 1;
|
|
}
|
|
|
|
|
|
if (get_bus_io_range(bus, &start_phys, &start_virt, &size))
|
|
return 1;
|
|
if (start_phys == 0)
|
|
return 1;
|
|
printk("mapping IO %lx -> %lx, size: %lx\n", start_phys, start_virt, size);
|
|
if (__ioremap_explicit(start_phys, start_virt, size,
|
|
_PAGE_NO_CACHE | _PAGE_GUARDED))
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(remap_bus_range);
|
|
|
|
static void phbs_remap_io(void)
|
|
{
|
|
struct pci_controller *hose, *tmp;
|
|
|
|
list_for_each_entry_safe(hose, tmp, &hose_list, list_node)
|
|
remap_bus_range(hose->bus);
|
|
}
|
|
|
|
static void __devinit fixup_resource(struct resource *res, struct pci_dev *dev)
|
|
{
|
|
struct pci_controller *hose = pci_bus_to_host(dev->bus);
|
|
unsigned long start, end, mask, offset;
|
|
|
|
if (res->flags & IORESOURCE_IO) {
|
|
offset = (unsigned long)hose->io_base_virt - pci_io_base;
|
|
|
|
start = res->start += offset;
|
|
end = res->end += offset;
|
|
|
|
/* Need to allow IO access to pages that are in the
|
|
ISA range */
|
|
if (start < MAX_ISA_PORT) {
|
|
if (end > MAX_ISA_PORT)
|
|
end = MAX_ISA_PORT;
|
|
|
|
start >>= PAGE_SHIFT;
|
|
end >>= PAGE_SHIFT;
|
|
|
|
/* get the range of pages for the map */
|
|
mask = ((1 << (end+1)) - 1) ^ ((1 << start) - 1);
|
|
io_page_mask |= mask;
|
|
}
|
|
} else if (res->flags & IORESOURCE_MEM) {
|
|
res->start += hose->pci_mem_offset;
|
|
res->end += hose->pci_mem_offset;
|
|
}
|
|
}
|
|
|
|
void __devinit pcibios_fixup_device_resources(struct pci_dev *dev,
|
|
struct pci_bus *bus)
|
|
{
|
|
/* Update device resources. */
|
|
int i;
|
|
|
|
for (i = 0; i < PCI_NUM_RESOURCES; i++)
|
|
if (dev->resource[i].flags)
|
|
fixup_resource(&dev->resource[i], dev);
|
|
}
|
|
EXPORT_SYMBOL(pcibios_fixup_device_resources);
|
|
|
|
|
|
static void __devinit do_bus_setup(struct pci_bus *bus)
|
|
{
|
|
struct pci_dev *dev;
|
|
|
|
ppc_md.iommu_bus_setup(bus);
|
|
|
|
list_for_each_entry(dev, &bus->devices, bus_list)
|
|
ppc_md.iommu_dev_setup(dev);
|
|
|
|
if (ppc_md.irq_bus_setup)
|
|
ppc_md.irq_bus_setup(bus);
|
|
}
|
|
|
|
void __devinit pcibios_fixup_bus(struct pci_bus *bus)
|
|
{
|
|
struct pci_dev *dev = bus->self;
|
|
|
|
if (dev && pci_probe_only &&
|
|
(dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) {
|
|
/* This is a subordinate bridge */
|
|
|
|
pci_read_bridge_bases(bus);
|
|
pcibios_fixup_device_resources(dev, bus);
|
|
}
|
|
|
|
do_bus_setup(bus);
|
|
|
|
if (!pci_probe_only)
|
|
return;
|
|
|
|
list_for_each_entry(dev, &bus->devices, bus_list)
|
|
if ((dev->class >> 8) != PCI_CLASS_BRIDGE_PCI)
|
|
pcibios_fixup_device_resources(dev, bus);
|
|
}
|
|
EXPORT_SYMBOL(pcibios_fixup_bus);
|
|
|
|
/*
|
|
* Reads the interrupt pin to determine if interrupt is use by card.
|
|
* If the interrupt is used, then gets the interrupt line from the
|
|
* openfirmware and sets it in the pci_dev and pci_config line.
|
|
*/
|
|
int pci_read_irq_line(struct pci_dev *pci_dev)
|
|
{
|
|
u8 intpin;
|
|
struct device_node *node;
|
|
|
|
pci_read_config_byte(pci_dev, PCI_INTERRUPT_PIN, &intpin);
|
|
if (intpin == 0)
|
|
return 0;
|
|
|
|
node = pci_device_to_OF_node(pci_dev);
|
|
if (node == NULL)
|
|
return -1;
|
|
|
|
if (node->n_intrs == 0)
|
|
return -1;
|
|
|
|
pci_dev->irq = node->intrs[0].line;
|
|
|
|
pci_write_config_byte(pci_dev, PCI_INTERRUPT_LINE, pci_dev->irq);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(pci_read_irq_line);
|
|
|
|
void pci_resource_to_user(const struct pci_dev *dev, int bar,
|
|
const struct resource *rsrc,
|
|
u64 *start, u64 *end)
|
|
{
|
|
struct pci_controller *hose = pci_bus_to_host(dev->bus);
|
|
unsigned long offset = 0;
|
|
|
|
if (hose == NULL)
|
|
return;
|
|
|
|
if (rsrc->flags & IORESOURCE_IO)
|
|
offset = pci_io_base - (unsigned long)hose->io_base_virt +
|
|
hose->io_base_phys;
|
|
|
|
*start = rsrc->start + offset;
|
|
*end = rsrc->end + offset;
|
|
}
|
|
|
|
struct pci_controller* pci_find_hose_for_OF_device(struct device_node* node)
|
|
{
|
|
if (!have_of)
|
|
return NULL;
|
|
while(node) {
|
|
struct pci_controller *hose, *tmp;
|
|
list_for_each_entry_safe(hose, tmp, &hose_list, list_node)
|
|
if (hose->arch_data == node)
|
|
return hose;
|
|
node = node->parent;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
#endif /* CONFIG_PPC_MULTIPLATFORM */
|
|
|
|
unsigned long pci_address_to_pio(phys_addr_t address)
|
|
{
|
|
struct pci_controller *hose, *tmp;
|
|
|
|
list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
|
|
if (address >= hose->io_base_phys &&
|
|
address < (hose->io_base_phys + hose->pci_io_size)) {
|
|
unsigned long base =
|
|
(unsigned long)hose->io_base_virt - pci_io_base;
|
|
return base + (address - hose->io_base_phys);
|
|
}
|
|
}
|
|
return (unsigned int)-1;
|
|
}
|
|
EXPORT_SYMBOL_GPL(pci_address_to_pio);
|
|
|
|
|
|
#define IOBASE_BRIDGE_NUMBER 0
|
|
#define IOBASE_MEMORY 1
|
|
#define IOBASE_IO 2
|
|
#define IOBASE_ISA_IO 3
|
|
#define IOBASE_ISA_MEM 4
|
|
|
|
long sys_pciconfig_iobase(long which, unsigned long in_bus,
|
|
unsigned long in_devfn)
|
|
{
|
|
struct pci_controller* hose;
|
|
struct list_head *ln;
|
|
struct pci_bus *bus = NULL;
|
|
struct device_node *hose_node;
|
|
|
|
/* Argh ! Please forgive me for that hack, but that's the
|
|
* simplest way to get existing XFree to not lockup on some
|
|
* G5 machines... So when something asks for bus 0 io base
|
|
* (bus 0 is HT root), we return the AGP one instead.
|
|
*/
|
|
if (machine_is_compatible("MacRISC4"))
|
|
if (in_bus == 0)
|
|
in_bus = 0xf0;
|
|
|
|
/* That syscall isn't quite compatible with PCI domains, but it's
|
|
* used on pre-domains setup. We return the first match
|
|
*/
|
|
|
|
for (ln = pci_root_buses.next; ln != &pci_root_buses; ln = ln->next) {
|
|
bus = pci_bus_b(ln);
|
|
if (in_bus >= bus->number && in_bus < (bus->number + bus->subordinate))
|
|
break;
|
|
bus = NULL;
|
|
}
|
|
if (bus == NULL || bus->sysdata == NULL)
|
|
return -ENODEV;
|
|
|
|
hose_node = (struct device_node *)bus->sysdata;
|
|
hose = PCI_DN(hose_node)->phb;
|
|
|
|
switch (which) {
|
|
case IOBASE_BRIDGE_NUMBER:
|
|
return (long)hose->first_busno;
|
|
case IOBASE_MEMORY:
|
|
return (long)hose->pci_mem_offset;
|
|
case IOBASE_IO:
|
|
return (long)hose->io_base_phys;
|
|
case IOBASE_ISA_IO:
|
|
return (long)isa_io_base;
|
|
case IOBASE_ISA_MEM:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return -EOPNOTSUPP;
|
|
}
|