From 58083dade53cd434e134cd26ae5e89061f6de1ff Mon Sep 17 00:00:00 2001 From: Kumar Gala Date: Wed, 27 Jun 2007 11:07:51 -0500 Subject: [POWERPC] Move common PCI code out of pci_32/pci_64 Moved the low hanging fruit that was either identical or close to it between ppc32 & ppc64 for PCI into pci-common.c Signed-off-by: Kumar Gala --- arch/powerpc/kernel/pci_32.c | 294 ------------------------------------------- 1 file changed, 294 deletions(-) (limited to 'arch/powerpc/kernel/pci_32.c') diff --git a/arch/powerpc/kernel/pci_32.c b/arch/powerpc/kernel/pci_32.c index c81ffa2..3dd931e 100644 --- a/arch/powerpc/kernel/pci_32.c +++ b/arch/powerpc/kernel/pci_32.c @@ -1028,34 +1028,12 @@ pci_create_OF_bus_map(void) } } -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); - #else /* CONFIG_PPC_OF */ void pcibios_make_OF_bus_map(void) { } #endif /* CONFIG_PPC_OF */ -/* Add sysfs properties */ -void pcibios_add_platform_entries(struct pci_dev *pdev) -{ -#ifdef CONFIG_PPC_OF - device_create_file(&pdev->dev, &dev_attr_devspec); -#endif /* CONFIG_PPC_OF */ -} - - #ifdef CONFIG_PPC_PMAC /* * This set of routines checks for PCI<->PCI bridges that have closed @@ -1390,11 +1368,6 @@ void __init pcibios_fixup_bus(struct pci_bus *bus) } } -char __init *pcibios_setup(char *str) -{ - return str; -} - /* the next one is stolen from the alpha port... */ void __init pcibios_update_irq(struct pci_dev *dev, int irq) @@ -1403,64 +1376,6 @@ pcibios_update_irq(struct pci_dev *dev, int irq) /* XXX FIXME - update OF device tree node interrupt property */ } -#ifdef CONFIG_PPC_MERGE -/* XXX This is a copy of the ppc64 version. This is temporary until we start - * merging the 2 PCI layers - */ -/* - * 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) -{ - struct of_irq oirq; - unsigned int virq; - - DBG("Try to map irq for %s...\n", pci_name(pci_dev)); - - /* Try to get a mapping from the device-tree */ - if (of_irq_map_pci(pci_dev, &oirq)) { - u8 line, pin; - - /* If that fails, lets fallback to what is in the config - * space and map that through the default controller. We - * also set the type to level low since that's what PCI - * interrupts are. If your platform does differently, then - * either provide a proper interrupt tree or don't use this - * function. - */ - if (pci_read_config_byte(pci_dev, PCI_INTERRUPT_PIN, &pin)) - return -1; - if (pin == 0) - return -1; - if (pci_read_config_byte(pci_dev, PCI_INTERRUPT_LINE, &line) || - line == 0xff) { - return -1; - } - DBG(" -> no map ! Using irq line %d from PCI config\n", line); - - virq = irq_create_mapping(NULL, line); - if (virq != NO_IRQ) - set_irq_type(virq, IRQ_TYPE_LEVEL_LOW); - } else { - DBG(" -> got one, spec %d cells (0x%08x...) on %s\n", - oirq.size, oirq.specifier[0], oirq.controller->full_name); - - virq = irq_create_of_mapping(oirq.controller, oirq.specifier, - oirq.size); - } - if(virq == NO_IRQ) { - DBG(" -> failed to map !\n"); - return -1; - } - pci_dev->irq = virq; - - return 0; -} -EXPORT_SYMBOL(pci_read_irq_line); -#endif /* CONFIG_PPC_MERGE */ - int pcibios_enable_device(struct pci_dev *dev, int mask) { u16 cmd, old_cmd; @@ -1503,176 +1418,6 @@ pci_bus_to_hose(int bus) return NULL; } -static struct resource *__pci_mmap_make_offset(struct pci_dev *dev, - resource_size_t *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) { -#if 0 /* See comment in pci_resource_to_user() for why this is disabled */ - *offset += hose->pci_mem_offset; -#endif - res_bit = IORESOURCE_MEM; - } else { - io_offset = hose->io_base_virt - (void __iomem *)_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; - - 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) -{ - resource_size_t 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_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; -} - /* Provide information on locations of various I/O regions in physical * memory. Do this on a per-card basis so that we choose the right * root bridge. @@ -1715,45 +1460,6 @@ long sys_pciconfig_iobase(long which, unsigned long bus, unsigned long devfn) return result; } -void pci_resource_to_user(const struct pci_dev *dev, int bar, - const struct resource *rsrc, - resource_size_t *start, resource_size_t *end) -{ - struct pci_controller *hose = pci_bus_to_host(dev->bus); - resource_size_t offset = 0; - - if (hose == NULL) - return; - - if (rsrc->flags & IORESOURCE_IO) - offset = (unsigned long)hose->io_base_virt - _IO_BASE; - - /* We pass a fully fixed up address to userland for MMIO instead of - * a BAR value because X is lame and expects to be able to use that - * to pass to /dev/mem ! - * - * That means that we'll have potentially 64 bits values where some - * userland apps only expect 32 (like X itself since it thinks only - * Sparc has 64 bits MMIO) but if we don't do that, we break it on - * 32 bits CHRPs :-( - * - * Hopefully, the sysfs insterface is immune to that gunk. Once X - * has been fixed (and the fix spread enough), we can re-enable the - * 2 lines below and pass down a BAR value to userland. In that case - * we'll also have to re-enable the matching code in - * __pci_mmap_make_offset(). - * - * BenH. - */ -#if 0 - else if (rsrc->flags & IORESOURCE_MEM) - offset = hose->pci_mem_offset; -#endif - - *start = rsrc->start - offset; - *end = rsrc->end - offset; -} - unsigned long pci_address_to_pio(phys_addr_t address) { struct pci_controller* hose = hose_head; -- cgit v1.1