diff options
Diffstat (limited to 'arch/powerpc/kernel/pci-common.c')
| -rw-r--r-- | arch/powerpc/kernel/pci-common.c | 79 |
1 files changed, 18 insertions, 61 deletions
diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c index f93942b..a5c0153 100644 --- a/arch/powerpc/kernel/pci-common.c +++ b/arch/powerpc/kernel/pci-common.c @@ -412,36 +412,6 @@ static struct resource *__pci_mmap_make_offset(struct pci_dev *dev, } /* - * 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) -{ - - /* 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 */ - if (write_combine) - return pgprot_noncached_wc(protection); - else - return pgprot_noncached(protection); -} - -/* * 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 @@ -514,9 +484,10 @@ int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma, 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); + if (write_combine) + vma->vm_page_prot = pgprot_noncached_wc(vma->vm_page_prot); + else + vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); ret = remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff, vma->vm_end - vma->vm_start, vma->vm_page_prot); @@ -666,39 +637,25 @@ 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; + struct pci_bus_region region; - if (hose == NULL) + if (rsrc->flags & IORESOURCE_IO) { + pcibios_resource_to_bus(dev->bus, ®ion, + (struct resource *) rsrc); + *start = region.start; + *end = region.end; 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(). + /* We pass a CPU physical 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! * - * BenH. + * That means we may have 64-bit values where some apps only expect + * 32 (like X itself since it thinks only Sparc has 64-bit MMIO). */ -#if 0 - else if (rsrc->flags & IORESOURCE_MEM) - offset = hose->pci_mem_offset; -#endif - - *start = rsrc->start - offset; - *end = rsrc->end - offset; + *start = rsrc->start; + *end = rsrc->end; } /** |