static unsigned long pci_ea_flags(struct pci_dev *dev, u8 prop)
{
- unsigned long flags = IORESOURCE_PCI_FIXED;
+ unsigned long flags = IORESOURCE_PCI_FIXED | IORESOURCE_PCI_EA_BEI;
switch (prop) {
case PCI_EA_P_MEM:
return offset + ent_size;
}
-/* Enhanced Allocation Initalization */
+/* Enhanced Allocation Initialization */
void pci_ea_init(struct pci_dev *dev)
{
int ea;
* pci_std_enable_acs - enable ACS on devices using standard ACS capabilites
* @dev: the PCI device
*/
-static int pci_std_enable_acs(struct pci_dev *dev)
+static void pci_std_enable_acs(struct pci_dev *dev)
{
int pos;
u16 cap;
pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ACS);
if (!pos)
- return -ENODEV;
+ return;
pci_read_config_word(dev, pos + PCI_ACS_CAP, &cap);
pci_read_config_word(dev, pos + PCI_ACS_CTRL, &ctrl);
ctrl |= (cap & PCI_ACS_UF);
pci_write_config_word(dev, pos + PCI_ACS_CTRL, ctrl);
-
- return 0;
}
/**
if (!pci_acs_enable)
return;
- if (!pci_std_enable_acs(dev))
+ if (!pci_dev_specific_enable_acs(dev))
return;
- pci_dev_specific_enable_acs(dev);
+ pci_std_enable_acs(dev);
}
static bool pci_acs_flags_enabled(struct pci_dev *pdev, u16 acs_flags)
}
EXPORT_SYMBOL(pci_request_regions_exclusive);
+#ifdef PCI_IOBASE
+struct io_range {
+ struct list_head list;
+ phys_addr_t start;
+ resource_size_t size;
+};
+
+static LIST_HEAD(io_range_list);
+static DEFINE_SPINLOCK(io_range_lock);
+#endif
+
+/*
+ * Record the PCI IO range (expressed as CPU physical address + size).
+ * Return a negative value if an error has occured, zero otherwise
+ */
+int __weak pci_register_io_range(phys_addr_t addr, resource_size_t size)
+{
+ int err = 0;
+
+#ifdef PCI_IOBASE
+ struct io_range *range;
+ resource_size_t allocated_size = 0;
+
+ /* check if the range hasn't been previously recorded */
+ spin_lock(&io_range_lock);
+ list_for_each_entry(range, &io_range_list, list) {
+ if (addr >= range->start && addr + size <= range->start + size) {
+ /* range already registered, bail out */
+ goto end_register;
+ }
+ allocated_size += range->size;
+ }
+
+ /* range not registed yet, check for available space */
+ if (allocated_size + size - 1 > IO_SPACE_LIMIT) {
+ /* if it's too big check if 64K space can be reserved */
+ if (allocated_size + SZ_64K - 1 > IO_SPACE_LIMIT) {
+ err = -E2BIG;
+ goto end_register;
+ }
+
+ size = SZ_64K;
+ pr_warn("Requested IO range too big, new size set to 64K\n");
+ }
+
+ /* add the range to the list */
+ range = kzalloc(sizeof(*range), GFP_ATOMIC);
+ if (!range) {
+ err = -ENOMEM;
+ goto end_register;
+ }
+
+ range->start = addr;
+ range->size = size;
+
+ list_add_tail(&range->list, &io_range_list);
+
+end_register:
+ spin_unlock(&io_range_lock);
+#endif
+
+ return err;
+}
+
+phys_addr_t pci_pio_to_address(unsigned long pio)
+{
+ phys_addr_t address = (phys_addr_t)OF_BAD_ADDR;
+
+#ifdef PCI_IOBASE
+ struct io_range *range;
+ resource_size_t allocated_size = 0;
+
+ if (pio > IO_SPACE_LIMIT)
+ return address;
+
+ spin_lock(&io_range_lock);
+ list_for_each_entry(range, &io_range_list, list) {
+ if (pio >= allocated_size && pio < allocated_size + range->size) {
+ address = range->start + pio - allocated_size;
+ break;
+ }
+ allocated_size += range->size;
+ }
+ spin_unlock(&io_range_lock);
+#endif
+
+ return address;
+}
+
+unsigned long __weak pci_address_to_pio(phys_addr_t address)
+{
+#ifdef PCI_IOBASE
+ struct io_range *res;
+ resource_size_t offset = 0;
+ unsigned long addr = -1;
+
+ spin_lock(&io_range_lock);
+ list_for_each_entry(res, &io_range_list, list) {
+ if (address >= res->start && address < res->start + res->size) {
+ addr = address - res->start + offset;
+ break;
+ }
+ offset += res->size;
+ }
+ spin_unlock(&io_range_lock);
+
+ return addr;
+#else
+ if (address > IO_SPACE_LIMIT)
+ return (unsigned long)-1;
+
+ return (unsigned long) address;
+#endif
+}
+
/**
* pci_remap_iospace - Remap the memory mapped I/O space
* @res: Resource describing the I/O space
return 0;
}
+/**
+ * pci_add_dma_alias - Add a DMA devfn alias for a device
+ * @dev: the PCI device for which alias is added
+ * @devfn: alias slot and function
+ *
+ * This helper encodes 8-bit devfn as bit number in dma_alias_mask.
+ * It should be called early, preferably as PCI fixup header quirk.
+ */
+void pci_add_dma_alias(struct pci_dev *dev, u8 devfn)
+{
+ if (!dev->dma_alias_mask)
+ dev->dma_alias_mask = kcalloc(BITS_TO_LONGS(U8_MAX),
+ sizeof(long), GFP_KERNEL);
+ if (!dev->dma_alias_mask) {
+ dev_warn(&dev->dev, "Unable to allocate DMA alias mask\n");
+ return;
+ }
+
+ set_bit(devfn, dev->dma_alias_mask);
+ dev_info(&dev->dev, "Enabling fixed DMA alias to %02x.%d\n",
+ PCI_SLOT(devfn), PCI_FUNC(devfn));
+}
+
+bool pci_devs_are_dma_aliases(struct pci_dev *dev1, struct pci_dev *dev2)
+{
+ return (dev1->dma_alias_mask &&
+ test_bit(dev2->devfn, dev1->dma_alias_mask)) ||
+ (dev2->dma_alias_mask &&
+ test_bit(dev1->devfn, dev2->dma_alias_mask));
+}
+
bool pci_device_is_present(struct pci_dev *pdev)
{
u32 v;
projects / linux-2.6-block.git / blobdiff