if (pass)
continue;
r = &dev->resource[PCI_ROM_RESOURCE];
- if (r->flags & PCI_ROM_ADDRESS_ENABLE) {
+ if (r->flags & IORESOURCE_ROM_ENABLE) {
/* Turn the ROM off, leave the resource region, but keep it unregistered. */
u32 reg;
DBG("PCI: Switching off ROM of %s\n", pci_name(dev));
- r->flags &= ~PCI_ROM_ADDRESS_ENABLE;
+ r->flags &= ~IORESOURCE_ROM_ENABLE;
pci_read_config_dword(dev, dev->rom_base_reg, ®);
pci_write_config_dword(dev, dev->rom_base_reg,
reg & ~PCI_ROM_ADDRESS_ENABLE);
return;
res = *(bus->resource[0]);
- DBG("Remapping Bus %d, bridge: %s\n", bus->number, bridge->slot_name);
+ DBG("Remapping Bus %d, bridge: %s\n", bus->number, pci_name(bridge));
res.start -= ((unsigned long) hose->io_base_virt - isa_io_base);
res.end -= ((unsigned long) hose->io_base_virt - isa_io_base);
DBG(" IO window: %08lx-%08lx\n", res.start, res.end);
return NULL;
}
-void*
+void __iomem *
pci_bus_io_base(unsigned int bus)
{
struct pci_controller *hose;
return res->start;
}
-/*
- * 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 __inline__ int
-__pci_mmap_make_offset(struct pci_dev *dev, struct vm_area_struct *vma,
- enum pci_mmap_state mmap_state)
+static struct resource *__pci_mmap_make_offset(struct pci_dev *dev,
+ unsigned long *offset,
+ enum pci_mmap_state mmap_state)
{
- struct pci_controller *hose = (struct pci_controller *) dev->sysdata;
- unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
- unsigned long size = vma->vm_end - vma->vm_start;
- unsigned long base;
- struct resource *res;
- int i;
- int ret = -EINVAL;
+ struct pci_controller *hose = pci_bus_to_hose(dev->bus->number);
+ unsigned long io_offset = 0;
+ int i, res_bit;
if (hose == 0)
- return -EINVAL; /* should never happen */
- if (offset + size <= offset)
- return -EINVAL;
+ return NULL; /* should never happen */
+ /* If memory, add on the PCI bridge address offset */
if (mmap_state == pci_mmap_mem) {
- /* PCI memory space */
- base = hose->pci_mem_offset;
- for (i = 0; i < 3; ++i) {
- res = &hose->mem_resources[i];
- if (res->flags == 0)
- continue;
- if (offset >= res->start - base
- && offset + size - 1 <= res->end - base) {
- ret = 0;
- break;
- }
- }
- offset += hose->pci_mem_offset;
+ *offset += hose->pci_mem_offset;
+ res_bit = IORESOURCE_MEM;
} else {
- /* PCI I/O space */
- base = (unsigned long)hose->io_base_virt - isa_io_base;
- res = &hose->io_resource;
- if (offset >= res->start - base
- && offset + size - 1 <= res->end - base)
- ret = 0;
- offset += hose->io_base_phys;
+ io_offset = (unsigned long)hose->io_base_virt;
+ *offset += io_offset;
+ res_bit = IORESOURCE_IO;
}
- vma->vm_pgoff = offset >> PAGE_SHIFT;
- return ret;
-}
+ /*
+ * 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;
-/*
- * Set vm_flags of VMA, as appropriate for this architecture, for a pci device
- * mapping.
- */
-static __inline__ void
-__pci_mmap_set_flags(struct pci_dev *dev, struct vm_area_struct *vma,
- enum pci_mmap_state mmap_state)
-{
- vma->vm_flags |= VM_SHM | VM_LOCKED | VM_IO;
+ /* 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_BASE;
+ return rp;
+ }
+
+ return NULL;
}
/*
* Set vm_page_prot of VMA, as appropriate for this architecture, for a pci
* device mapping.
*/
-static __inline__ void
-__pci_mmap_set_pgprot(struct pci_dev *dev, struct vm_area_struct *vma,
- enum pci_mmap_state mmap_state, int write_combine)
+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)
{
- int prot = pgprot_val(vma->vm_page_prot);
+ 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)
+ if (write_combine)
+ prot &= ~_PAGE_GUARDED;
+ else
prot |= _PAGE_GUARDED;
- vma->vm_page_prot = __pgprot(prot);
+
+ 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 offset,
+ unsigned long size,
+ pgprot_t protection)
+{
+ struct pci_dev *pdev = NULL;
+ struct resource *found = NULL;
+ unsigned long prot = pgprot_val(protection);
+ int i;
+
+ if (page_is_ram(offset >> PAGE_SHIFT))
+ return 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
enum pci_mmap_state mmap_state,
int write_combine)
{
+ unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
+ struct resource *rp;
int ret;
- ret = __pci_mmap_make_offset(dev, vma, mmap_state);
- if (ret < 0)
- return ret;
+ rp = __pci_mmap_make_offset(dev, &offset, mmap_state);
+ if (rp == NULL)
+ return -EINVAL;
- __pci_mmap_set_flags(dev, vma, mmap_state);
- __pci_mmap_set_pgprot(dev, vma, mmap_state, write_combine);
+ 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);
git://git.onelab.eu / linux-2.6.git / blobdiff