|
@@ -16,713 +16,6 @@
|
|
|
|
|
|
#include "pci_impl.h"
|
|
#include "pci_impl.h"
|
|
|
|
|
|
-/* Fix self device of BUS and hook it into BUS->self.
|
|
|
|
- * The pci_scan_bus does not do this for the host bridge.
|
|
|
|
- */
|
|
|
|
-void __init pci_fixup_host_bridge_self(struct pci_bus *pbus)
|
|
|
|
-{
|
|
|
|
- struct pci_dev *pdev;
|
|
|
|
-
|
|
|
|
- list_for_each_entry(pdev, &pbus->devices, bus_list) {
|
|
|
|
- if (pdev->class >> 8 == PCI_CLASS_BRIDGE_HOST) {
|
|
|
|
- pbus->self = pdev;
|
|
|
|
- return;
|
|
|
|
- }
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- prom_printf("PCI: Critical error, cannot find host bridge PDEV.\n");
|
|
|
|
- prom_halt();
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-/* Find the OBP PROM device tree node for a PCI device. */
|
|
|
|
-static struct device_node * __init
|
|
|
|
-find_device_prom_node(struct pci_pbm_info *pbm, struct pci_dev *pdev,
|
|
|
|
- struct device_node *bus_node,
|
|
|
|
- struct linux_prom_pci_registers **pregs,
|
|
|
|
- int *nregs)
|
|
|
|
-{
|
|
|
|
- struct device_node *dp;
|
|
|
|
-
|
|
|
|
- *nregs = 0;
|
|
|
|
-
|
|
|
|
- /*
|
|
|
|
- * Return the PBM's PROM node in case we are it's PCI device,
|
|
|
|
- * as the PBM's reg property is different to standard PCI reg
|
|
|
|
- * properties. We would delete this device entry otherwise,
|
|
|
|
- * which confuses XFree86's device probing...
|
|
|
|
- */
|
|
|
|
- if ((pdev->bus->number == pbm->pci_bus->number) && (pdev->devfn == 0) &&
|
|
|
|
- (pdev->vendor == PCI_VENDOR_ID_SUN) &&
|
|
|
|
- (pdev->device == PCI_DEVICE_ID_SUN_PBM ||
|
|
|
|
- pdev->device == PCI_DEVICE_ID_SUN_SCHIZO ||
|
|
|
|
- pdev->device == PCI_DEVICE_ID_SUN_TOMATILLO ||
|
|
|
|
- pdev->device == PCI_DEVICE_ID_SUN_SABRE ||
|
|
|
|
- pdev->device == PCI_DEVICE_ID_SUN_HUMMINGBIRD))
|
|
|
|
- return bus_node;
|
|
|
|
-
|
|
|
|
- dp = bus_node->child;
|
|
|
|
- while (dp) {
|
|
|
|
- struct linux_prom_pci_registers *regs;
|
|
|
|
- struct property *prop;
|
|
|
|
- int len;
|
|
|
|
-
|
|
|
|
- prop = of_find_property(dp, "reg", &len);
|
|
|
|
- if (!prop)
|
|
|
|
- goto do_next_sibling;
|
|
|
|
-
|
|
|
|
- regs = prop->value;
|
|
|
|
- if (((regs[0].phys_hi >> 8) & 0xff) == pdev->devfn) {
|
|
|
|
- *pregs = regs;
|
|
|
|
- *nregs = len / sizeof(struct linux_prom_pci_registers);
|
|
|
|
- return dp;
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- do_next_sibling:
|
|
|
|
- dp = dp->sibling;
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- return NULL;
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-/* Older versions of OBP on PCI systems encode 64-bit MEM
|
|
|
|
- * space assignments incorrectly, this fixes them up. We also
|
|
|
|
- * take the opportunity here to hide other kinds of bogus
|
|
|
|
- * assignments.
|
|
|
|
- */
|
|
|
|
-static void __init fixup_obp_assignments(struct pci_dev *pdev,
|
|
|
|
- struct pcidev_cookie *pcp)
|
|
|
|
-{
|
|
|
|
- int i;
|
|
|
|
-
|
|
|
|
- if (pdev->vendor == PCI_VENDOR_ID_AL &&
|
|
|
|
- (pdev->device == PCI_DEVICE_ID_AL_M7101 ||
|
|
|
|
- pdev->device == PCI_DEVICE_ID_AL_M1533)) {
|
|
|
|
- int i;
|
|
|
|
-
|
|
|
|
- /* Zap all of the normal resources, they are
|
|
|
|
- * meaningless and generate bogus resource collision
|
|
|
|
- * messages. This is OpenBoot's ill-fated attempt to
|
|
|
|
- * represent the implicit resources that these devices
|
|
|
|
- * have.
|
|
|
|
- */
|
|
|
|
- pcp->num_prom_assignments = 0;
|
|
|
|
- for (i = 0; i < 6; i++) {
|
|
|
|
- pdev->resource[i].start =
|
|
|
|
- pdev->resource[i].end =
|
|
|
|
- pdev->resource[i].flags = 0;
|
|
|
|
- }
|
|
|
|
- pdev->resource[PCI_ROM_RESOURCE].start =
|
|
|
|
- pdev->resource[PCI_ROM_RESOURCE].end =
|
|
|
|
- pdev->resource[PCI_ROM_RESOURCE].flags = 0;
|
|
|
|
- return;
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- for (i = 0; i < pcp->num_prom_assignments; i++) {
|
|
|
|
- struct linux_prom_pci_registers *ap;
|
|
|
|
- int space;
|
|
|
|
-
|
|
|
|
- ap = &pcp->prom_assignments[i];
|
|
|
|
- space = ap->phys_hi >> 24;
|
|
|
|
- if ((space & 0x3) == 2 &&
|
|
|
|
- (space & 0x4) != 0) {
|
|
|
|
- ap->phys_hi &= ~(0x7 << 24);
|
|
|
|
- ap->phys_hi |= 0x3 << 24;
|
|
|
|
- }
|
|
|
|
- }
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-static ssize_t
|
|
|
|
-show_pciobppath_attr(struct device * dev, struct device_attribute * attr, char * buf)
|
|
|
|
-{
|
|
|
|
- struct pci_dev *pdev;
|
|
|
|
- struct pcidev_cookie *sysdata;
|
|
|
|
-
|
|
|
|
- pdev = to_pci_dev(dev);
|
|
|
|
- sysdata = pdev->sysdata;
|
|
|
|
-
|
|
|
|
- return snprintf (buf, PAGE_SIZE, "%s\n", sysdata->prom_node->full_name);
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-static DEVICE_ATTR(obppath, S_IRUSR | S_IRGRP | S_IROTH, show_pciobppath_attr, NULL);
|
|
|
|
-
|
|
|
|
-/* Fill in the PCI device cookie sysdata for the given
|
|
|
|
- * PCI device. This cookie is the means by which one
|
|
|
|
- * can get to OBP and PCI controller specific information
|
|
|
|
- * for a PCI device.
|
|
|
|
- */
|
|
|
|
-static void __init pdev_cookie_fillin(struct pci_pbm_info *pbm,
|
|
|
|
- struct pci_dev *pdev,
|
|
|
|
- struct device_node *bus_node)
|
|
|
|
-{
|
|
|
|
- struct linux_prom_pci_registers *pregs = NULL;
|
|
|
|
- struct pcidev_cookie *pcp;
|
|
|
|
- struct device_node *dp;
|
|
|
|
- struct property *prop;
|
|
|
|
- int nregs, len, err;
|
|
|
|
-
|
|
|
|
- dp = find_device_prom_node(pbm, pdev, bus_node,
|
|
|
|
- &pregs, &nregs);
|
|
|
|
- if (!dp) {
|
|
|
|
- /* If it is not in the OBP device tree then
|
|
|
|
- * there must be a damn good reason for it.
|
|
|
|
- *
|
|
|
|
- * So what we do is delete the device from the
|
|
|
|
- * PCI device tree completely. This scenario
|
|
|
|
- * is seen, for example, on CP1500 for the
|
|
|
|
- * second EBUS/HappyMeal pair if the external
|
|
|
|
- * connector for it is not present.
|
|
|
|
- */
|
|
|
|
- pci_remove_bus_device(pdev);
|
|
|
|
- return;
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- pcp = kzalloc(sizeof(*pcp), GFP_ATOMIC);
|
|
|
|
- if (pcp == NULL) {
|
|
|
|
- prom_printf("PCI_COOKIE: Fatal malloc error, aborting...\n");
|
|
|
|
- prom_halt();
|
|
|
|
- }
|
|
|
|
- pcp->pbm = pbm;
|
|
|
|
- pcp->prom_node = dp;
|
|
|
|
- pcp->op = of_find_device_by_node(dp);
|
|
|
|
- memcpy(pcp->prom_regs, pregs,
|
|
|
|
- nregs * sizeof(struct linux_prom_pci_registers));
|
|
|
|
- pcp->num_prom_regs = nregs;
|
|
|
|
-
|
|
|
|
- /* We can't have the pcidev_cookie assignments be just
|
|
|
|
- * direct pointers into the property value, since they
|
|
|
|
- * are potentially modified by the probing process.
|
|
|
|
- */
|
|
|
|
- prop = of_find_property(dp, "assigned-addresses", &len);
|
|
|
|
- if (!prop) {
|
|
|
|
- pcp->num_prom_assignments = 0;
|
|
|
|
- } else {
|
|
|
|
- memcpy(pcp->prom_assignments, prop->value, len);
|
|
|
|
- pcp->num_prom_assignments =
|
|
|
|
- (len / sizeof(pcp->prom_assignments[0]));
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- if (strcmp(dp->name, "ebus") == 0) {
|
|
|
|
- struct linux_prom_ebus_ranges *erng;
|
|
|
|
- int iter;
|
|
|
|
-
|
|
|
|
- /* EBUS is special... */
|
|
|
|
- prop = of_find_property(dp, "ranges", &len);
|
|
|
|
- if (!prop) {
|
|
|
|
- prom_printf("EBUS: Fatal error, no range property\n");
|
|
|
|
- prom_halt();
|
|
|
|
- }
|
|
|
|
- erng = prop->value;
|
|
|
|
- len = (len / sizeof(erng[0]));
|
|
|
|
- for (iter = 0; iter < len; iter++) {
|
|
|
|
- struct linux_prom_ebus_ranges *ep = &erng[iter];
|
|
|
|
- struct linux_prom_pci_registers *ap;
|
|
|
|
-
|
|
|
|
- ap = &pcp->prom_assignments[iter];
|
|
|
|
-
|
|
|
|
- ap->phys_hi = ep->parent_phys_hi;
|
|
|
|
- ap->phys_mid = ep->parent_phys_mid;
|
|
|
|
- ap->phys_lo = ep->parent_phys_lo;
|
|
|
|
- ap->size_hi = 0;
|
|
|
|
- ap->size_lo = ep->size;
|
|
|
|
- }
|
|
|
|
- pcp->num_prom_assignments = len;
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- fixup_obp_assignments(pdev, pcp);
|
|
|
|
-
|
|
|
|
- pdev->sysdata = pcp;
|
|
|
|
-
|
|
|
|
- /* we don't really care if we can create this file or not,
|
|
|
|
- * but we need to assign the result of the call or the world will fall
|
|
|
|
- * under alien invasion and everybody will be frozen on a spaceship
|
|
|
|
- * ready to be eaten on alpha centauri by some green and jelly humanoid.
|
|
|
|
- */
|
|
|
|
- err = sysfs_create_file(&pdev->dev.kobj, &dev_attr_obppath.attr);
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-void __init pci_fill_in_pbm_cookies(struct pci_bus *pbus,
|
|
|
|
- struct pci_pbm_info *pbm,
|
|
|
|
- struct device_node *dp)
|
|
|
|
-{
|
|
|
|
- struct pci_dev *pdev, *pdev_next;
|
|
|
|
- struct pci_bus *this_pbus, *pbus_next;
|
|
|
|
-
|
|
|
|
- /* This must be _safe because the cookie fillin
|
|
|
|
- routine can delete devices from the tree. */
|
|
|
|
- list_for_each_entry_safe(pdev, pdev_next, &pbus->devices, bus_list)
|
|
|
|
- pdev_cookie_fillin(pbm, pdev, dp);
|
|
|
|
-
|
|
|
|
- list_for_each_entry_safe(this_pbus, pbus_next, &pbus->children, node) {
|
|
|
|
- struct pcidev_cookie *pcp = this_pbus->self->sysdata;
|
|
|
|
-
|
|
|
|
- pci_fill_in_pbm_cookies(this_pbus, pbm, pcp->prom_node);
|
|
|
|
- }
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-static void __init bad_assignment(struct pci_dev *pdev,
|
|
|
|
- struct linux_prom_pci_registers *ap,
|
|
|
|
- struct resource *res,
|
|
|
|
- int do_prom_halt)
|
|
|
|
-{
|
|
|
|
- prom_printf("PCI: Bogus PROM assignment. BUS[%02x] DEVFN[%x]\n",
|
|
|
|
- pdev->bus->number, pdev->devfn);
|
|
|
|
- if (ap)
|
|
|
|
- prom_printf("PCI: phys[%08x:%08x:%08x] size[%08x:%08x]\n",
|
|
|
|
- ap->phys_hi, ap->phys_mid, ap->phys_lo,
|
|
|
|
- ap->size_hi, ap->size_lo);
|
|
|
|
- if (res)
|
|
|
|
- prom_printf("PCI: RES[%016lx-->%016lx:(%lx)]\n",
|
|
|
|
- res->start, res->end, res->flags);
|
|
|
|
- if (do_prom_halt)
|
|
|
|
- prom_halt();
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-static struct resource *
|
|
|
|
-__init get_root_resource(struct linux_prom_pci_registers *ap,
|
|
|
|
- struct pci_pbm_info *pbm)
|
|
|
|
-{
|
|
|
|
- int space = (ap->phys_hi >> 24) & 3;
|
|
|
|
-
|
|
|
|
- switch (space) {
|
|
|
|
- case 0:
|
|
|
|
- /* Configuration space, silently ignore it. */
|
|
|
|
- return NULL;
|
|
|
|
-
|
|
|
|
- case 1:
|
|
|
|
- /* 16-bit IO space */
|
|
|
|
- return &pbm->io_space;
|
|
|
|
-
|
|
|
|
- case 2:
|
|
|
|
- /* 32-bit MEM space */
|
|
|
|
- return &pbm->mem_space;
|
|
|
|
-
|
|
|
|
- case 3:
|
|
|
|
- /* 64-bit MEM space, these are allocated out of
|
|
|
|
- * the 32-bit mem_space range for the PBM, ie.
|
|
|
|
- * we just zero out the upper 32-bits.
|
|
|
|
- */
|
|
|
|
- return &pbm->mem_space;
|
|
|
|
-
|
|
|
|
- default:
|
|
|
|
- printk("PCI: What is resource space %x?\n", space);
|
|
|
|
- return NULL;
|
|
|
|
- };
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-static struct resource *
|
|
|
|
-__init get_device_resource(struct linux_prom_pci_registers *ap,
|
|
|
|
- struct pci_dev *pdev)
|
|
|
|
-{
|
|
|
|
- struct resource *res;
|
|
|
|
- int breg = (ap->phys_hi & 0xff);
|
|
|
|
-
|
|
|
|
- switch (breg) {
|
|
|
|
- case PCI_ROM_ADDRESS:
|
|
|
|
- /* Unfortunately I have seen several cases where
|
|
|
|
- * buggy FCODE uses a space value of '1' (I/O space)
|
|
|
|
- * in the register property for the ROM address
|
|
|
|
- * so disable this sanity check for now.
|
|
|
|
- */
|
|
|
|
-#if 0
|
|
|
|
- {
|
|
|
|
- int space = (ap->phys_hi >> 24) & 3;
|
|
|
|
-
|
|
|
|
- /* It had better be MEM space. */
|
|
|
|
- if (space != 2)
|
|
|
|
- bad_assignment(pdev, ap, NULL, 0);
|
|
|
|
- }
|
|
|
|
-#endif
|
|
|
|
- res = &pdev->resource[PCI_ROM_RESOURCE];
|
|
|
|
- break;
|
|
|
|
-
|
|
|
|
- case PCI_BASE_ADDRESS_0:
|
|
|
|
- case PCI_BASE_ADDRESS_1:
|
|
|
|
- case PCI_BASE_ADDRESS_2:
|
|
|
|
- case PCI_BASE_ADDRESS_3:
|
|
|
|
- case PCI_BASE_ADDRESS_4:
|
|
|
|
- case PCI_BASE_ADDRESS_5:
|
|
|
|
- res = &pdev->resource[(breg - PCI_BASE_ADDRESS_0) / 4];
|
|
|
|
- break;
|
|
|
|
-
|
|
|
|
- default:
|
|
|
|
- bad_assignment(pdev, ap, NULL, 0);
|
|
|
|
- res = NULL;
|
|
|
|
- break;
|
|
|
|
- };
|
|
|
|
-
|
|
|
|
- return res;
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-static void __init pdev_record_assignments(struct pci_pbm_info *pbm,
|
|
|
|
- struct pci_dev *pdev)
|
|
|
|
-{
|
|
|
|
- struct pcidev_cookie *pcp = pdev->sysdata;
|
|
|
|
- int i;
|
|
|
|
-
|
|
|
|
- for (i = 0; i < pcp->num_prom_assignments; i++) {
|
|
|
|
- struct linux_prom_pci_registers *ap;
|
|
|
|
- struct resource *root, *res;
|
|
|
|
-
|
|
|
|
- /* The format of this property is specified in
|
|
|
|
- * the PCI Bus Binding to IEEE1275-1994.
|
|
|
|
- */
|
|
|
|
- ap = &pcp->prom_assignments[i];
|
|
|
|
- root = get_root_resource(ap, pbm);
|
|
|
|
- res = get_device_resource(ap, pdev);
|
|
|
|
- if (root == NULL || res == NULL ||
|
|
|
|
- res->flags == 0)
|
|
|
|
- continue;
|
|
|
|
-
|
|
|
|
- /* Ok we know which resource this PROM assignment is
|
|
|
|
- * for, sanity check it.
|
|
|
|
- */
|
|
|
|
- if ((res->start & 0xffffffffUL) != ap->phys_lo)
|
|
|
|
- bad_assignment(pdev, ap, res, 1);
|
|
|
|
-
|
|
|
|
- /* If it is a 64-bit MEM space assignment, verify that
|
|
|
|
- * the resource is too and that the upper 32-bits match.
|
|
|
|
- */
|
|
|
|
- if (((ap->phys_hi >> 24) & 3) == 3) {
|
|
|
|
- if (((res->flags & IORESOURCE_MEM) == 0) ||
|
|
|
|
- ((res->flags & PCI_BASE_ADDRESS_MEM_TYPE_MASK)
|
|
|
|
- != PCI_BASE_ADDRESS_MEM_TYPE_64))
|
|
|
|
- bad_assignment(pdev, ap, res, 1);
|
|
|
|
- if ((res->start >> 32) != ap->phys_mid)
|
|
|
|
- bad_assignment(pdev, ap, res, 1);
|
|
|
|
-
|
|
|
|
- /* PBM cannot generate cpu initiated PIOs
|
|
|
|
- * to the full 64-bit space. Therefore the
|
|
|
|
- * upper 32-bits better be zero. If it is
|
|
|
|
- * not, just skip it and we will assign it
|
|
|
|
- * properly ourselves.
|
|
|
|
- */
|
|
|
|
- if ((res->start >> 32) != 0UL) {
|
|
|
|
- printk(KERN_ERR "PCI: OBP assigns out of range MEM address "
|
|
|
|
- "%016lx for region %ld on device %s\n",
|
|
|
|
- res->start, (res - &pdev->resource[0]), pci_name(pdev));
|
|
|
|
- continue;
|
|
|
|
- }
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- /* Adjust the resource into the physical address space
|
|
|
|
- * of this PBM.
|
|
|
|
- */
|
|
|
|
- pbm->parent->resource_adjust(pdev, res, root);
|
|
|
|
-
|
|
|
|
- if (request_resource(root, res) < 0) {
|
|
|
|
- int rnum;
|
|
|
|
-
|
|
|
|
- /* OK, there is some conflict. But this is fine
|
|
|
|
- * since we'll reassign it in the fixup pass.
|
|
|
|
- *
|
|
|
|
- * Do not print the warning for ROM resources
|
|
|
|
- * as such a conflict is quite common and
|
|
|
|
- * harmless as the ROM bar is disabled.
|
|
|
|
- */
|
|
|
|
- rnum = (res - &pdev->resource[0]);
|
|
|
|
- if (rnum != PCI_ROM_RESOURCE)
|
|
|
|
- printk(KERN_ERR "PCI: Resource collision, "
|
|
|
|
- "region %d "
|
|
|
|
- "[%016lx:%016lx] of device %s\n",
|
|
|
|
- rnum,
|
|
|
|
- res->start, res->end,
|
|
|
|
- pci_name(pdev));
|
|
|
|
- }
|
|
|
|
- }
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-void __init pci_record_assignments(struct pci_pbm_info *pbm,
|
|
|
|
- struct pci_bus *pbus)
|
|
|
|
-{
|
|
|
|
- struct pci_dev *dev;
|
|
|
|
- struct pci_bus *bus;
|
|
|
|
-
|
|
|
|
- list_for_each_entry(dev, &pbus->devices, bus_list)
|
|
|
|
- pdev_record_assignments(pbm, dev);
|
|
|
|
-
|
|
|
|
- list_for_each_entry(bus, &pbus->children, node)
|
|
|
|
- pci_record_assignments(pbm, bus);
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-/* Return non-zero if PDEV has implicit I/O resources even
|
|
|
|
- * though it may not have an I/O base address register
|
|
|
|
- * active.
|
|
|
|
- */
|
|
|
|
-static int __init has_implicit_io(struct pci_dev *pdev)
|
|
|
|
-{
|
|
|
|
- int class = pdev->class >> 8;
|
|
|
|
-
|
|
|
|
- if (class == PCI_CLASS_NOT_DEFINED ||
|
|
|
|
- class == PCI_CLASS_NOT_DEFINED_VGA ||
|
|
|
|
- class == PCI_CLASS_STORAGE_IDE ||
|
|
|
|
- (pdev->class >> 16) == PCI_BASE_CLASS_DISPLAY)
|
|
|
|
- return 1;
|
|
|
|
-
|
|
|
|
- return 0;
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-static void __init pdev_assign_unassigned(struct pci_pbm_info *pbm,
|
|
|
|
- struct pci_dev *pdev)
|
|
|
|
-{
|
|
|
|
- u32 reg;
|
|
|
|
- u16 cmd;
|
|
|
|
- int i, io_seen, mem_seen;
|
|
|
|
-
|
|
|
|
- io_seen = mem_seen = 0;
|
|
|
|
- for (i = 0; i < PCI_NUM_RESOURCES; i++) {
|
|
|
|
- struct resource *root, *res;
|
|
|
|
- unsigned long size, min, max, align;
|
|
|
|
-
|
|
|
|
- res = &pdev->resource[i];
|
|
|
|
-
|
|
|
|
- if (res->flags & IORESOURCE_IO)
|
|
|
|
- io_seen++;
|
|
|
|
- else if (res->flags & IORESOURCE_MEM)
|
|
|
|
- mem_seen++;
|
|
|
|
-
|
|
|
|
- /* If it is already assigned or the resource does
|
|
|
|
- * not exist, there is nothing to do.
|
|
|
|
- */
|
|
|
|
- if (res->parent != NULL || res->flags == 0UL)
|
|
|
|
- continue;
|
|
|
|
-
|
|
|
|
- /* Determine the root we allocate from. */
|
|
|
|
- if (res->flags & IORESOURCE_IO) {
|
|
|
|
- root = &pbm->io_space;
|
|
|
|
- min = root->start + 0x400UL;
|
|
|
|
- max = root->end;
|
|
|
|
- } else {
|
|
|
|
- root = &pbm->mem_space;
|
|
|
|
- min = root->start;
|
|
|
|
- max = min + 0x80000000UL;
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- size = res->end - res->start;
|
|
|
|
- align = size + 1;
|
|
|
|
- if (allocate_resource(root, res, size + 1, min, max, align, NULL, NULL) < 0) {
|
|
|
|
- /* uh oh */
|
|
|
|
- prom_printf("PCI: Failed to allocate resource %d for %s\n",
|
|
|
|
- i, pci_name(pdev));
|
|
|
|
- prom_halt();
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- /* Update PCI config space. */
|
|
|
|
- pbm->parent->base_address_update(pdev, i);
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- /* Special case, disable the ROM. Several devices
|
|
|
|
- * act funny (ie. do not respond to memory space writes)
|
|
|
|
- * when it is left enabled. A good example are Qlogic,ISP
|
|
|
|
- * adapters.
|
|
|
|
- */
|
|
|
|
- pci_read_config_dword(pdev, PCI_ROM_ADDRESS, ®);
|
|
|
|
- reg &= ~PCI_ROM_ADDRESS_ENABLE;
|
|
|
|
- pci_write_config_dword(pdev, PCI_ROM_ADDRESS, reg);
|
|
|
|
-
|
|
|
|
- /* If we saw I/O or MEM resources, enable appropriate
|
|
|
|
- * bits in PCI command register.
|
|
|
|
- */
|
|
|
|
- if (io_seen || mem_seen) {
|
|
|
|
- pci_read_config_word(pdev, PCI_COMMAND, &cmd);
|
|
|
|
- if (io_seen || has_implicit_io(pdev))
|
|
|
|
- cmd |= PCI_COMMAND_IO;
|
|
|
|
- if (mem_seen)
|
|
|
|
- cmd |= PCI_COMMAND_MEMORY;
|
|
|
|
- pci_write_config_word(pdev, PCI_COMMAND, cmd);
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- /* If this is a PCI bridge or an IDE controller,
|
|
|
|
- * enable bus mastering. In the former case also
|
|
|
|
- * set the cache line size correctly.
|
|
|
|
- */
|
|
|
|
- if (((pdev->class >> 8) == PCI_CLASS_BRIDGE_PCI) ||
|
|
|
|
- (((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE) &&
|
|
|
|
- ((pdev->class & 0x80) != 0))) {
|
|
|
|
- pci_read_config_word(pdev, PCI_COMMAND, &cmd);
|
|
|
|
- cmd |= PCI_COMMAND_MASTER;
|
|
|
|
- pci_write_config_word(pdev, PCI_COMMAND, cmd);
|
|
|
|
-
|
|
|
|
- if ((pdev->class >> 8) == PCI_CLASS_BRIDGE_PCI)
|
|
|
|
- pci_write_config_byte(pdev,
|
|
|
|
- PCI_CACHE_LINE_SIZE,
|
|
|
|
- (64 / sizeof(u32)));
|
|
|
|
- }
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-void __init pci_assign_unassigned(struct pci_pbm_info *pbm,
|
|
|
|
- struct pci_bus *pbus)
|
|
|
|
-{
|
|
|
|
- struct pci_dev *dev;
|
|
|
|
- struct pci_bus *bus;
|
|
|
|
-
|
|
|
|
- list_for_each_entry(dev, &pbus->devices, bus_list)
|
|
|
|
- pdev_assign_unassigned(pbm, dev);
|
|
|
|
-
|
|
|
|
- list_for_each_entry(bus, &pbus->children, node)
|
|
|
|
- pci_assign_unassigned(pbm, bus);
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-static void __init pdev_fixup_irq(struct pci_dev *pdev)
|
|
|
|
-{
|
|
|
|
- struct pcidev_cookie *pcp = pdev->sysdata;
|
|
|
|
- struct of_device *op = pcp->op;
|
|
|
|
-
|
|
|
|
- if (op->irqs[0] == 0xffffffff) {
|
|
|
|
- pdev->irq = PCI_IRQ_NONE;
|
|
|
|
- return;
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- pdev->irq = op->irqs[0];
|
|
|
|
-
|
|
|
|
- pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
|
|
|
|
- pdev->irq & PCI_IRQ_INO);
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-void __init pci_fixup_irq(struct pci_pbm_info *pbm,
|
|
|
|
- struct pci_bus *pbus)
|
|
|
|
-{
|
|
|
|
- struct pci_dev *dev;
|
|
|
|
- struct pci_bus *bus;
|
|
|
|
-
|
|
|
|
- list_for_each_entry(dev, &pbus->devices, bus_list)
|
|
|
|
- pdev_fixup_irq(dev);
|
|
|
|
-
|
|
|
|
- list_for_each_entry(bus, &pbus->children, node)
|
|
|
|
- pci_fixup_irq(pbm, bus);
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-static void pdev_setup_busmastering(struct pci_dev *pdev, int is_66mhz)
|
|
|
|
-{
|
|
|
|
- u16 cmd;
|
|
|
|
- u8 hdr_type, min_gnt, ltimer;
|
|
|
|
-
|
|
|
|
- pci_read_config_word(pdev, PCI_COMMAND, &cmd);
|
|
|
|
- cmd |= PCI_COMMAND_MASTER;
|
|
|
|
- pci_write_config_word(pdev, PCI_COMMAND, cmd);
|
|
|
|
-
|
|
|
|
- /* Read it back, if the mastering bit did not
|
|
|
|
- * get set, the device does not support bus
|
|
|
|
- * mastering so we have nothing to do here.
|
|
|
|
- */
|
|
|
|
- pci_read_config_word(pdev, PCI_COMMAND, &cmd);
|
|
|
|
- if ((cmd & PCI_COMMAND_MASTER) == 0)
|
|
|
|
- return;
|
|
|
|
-
|
|
|
|
- /* Set correct cache line size, 64-byte on all
|
|
|
|
- * Sparc64 PCI systems. Note that the value is
|
|
|
|
- * measured in 32-bit words.
|
|
|
|
- */
|
|
|
|
- pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE,
|
|
|
|
- 64 / sizeof(u32));
|
|
|
|
-
|
|
|
|
- pci_read_config_byte(pdev, PCI_HEADER_TYPE, &hdr_type);
|
|
|
|
- hdr_type &= ~0x80;
|
|
|
|
- if (hdr_type != PCI_HEADER_TYPE_NORMAL)
|
|
|
|
- return;
|
|
|
|
-
|
|
|
|
- /* If the latency timer is already programmed with a non-zero
|
|
|
|
- * value, assume whoever set it (OBP or whoever) knows what
|
|
|
|
- * they are doing.
|
|
|
|
- */
|
|
|
|
- pci_read_config_byte(pdev, PCI_LATENCY_TIMER, <imer);
|
|
|
|
- if (ltimer != 0)
|
|
|
|
- return;
|
|
|
|
-
|
|
|
|
- /* XXX Since I'm tipping off the min grant value to
|
|
|
|
- * XXX choose a suitable latency timer value, I also
|
|
|
|
- * XXX considered making use of the max latency value
|
|
|
|
- * XXX as well. Unfortunately I've seen too many bogusly
|
|
|
|
- * XXX low settings for it to the point where it lacks
|
|
|
|
- * XXX any usefulness. In one case, an ethernet card
|
|
|
|
- * XXX claimed a min grant of 10 and a max latency of 5.
|
|
|
|
- * XXX Now, if I had two such cards on the same bus I
|
|
|
|
- * XXX could not set the desired burst period (calculated
|
|
|
|
- * XXX from min grant) without violating the max latency
|
|
|
|
- * XXX bound. Duh...
|
|
|
|
- * XXX
|
|
|
|
- * XXX I blame dumb PC bios implementors for stuff like
|
|
|
|
- * XXX this, most of them don't even try to do something
|
|
|
|
- * XXX sensible with latency timer values and just set some
|
|
|
|
- * XXX default value (usually 32) into every device.
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
- pci_read_config_byte(pdev, PCI_MIN_GNT, &min_gnt);
|
|
|
|
-
|
|
|
|
- if (min_gnt == 0) {
|
|
|
|
- /* If no min_gnt setting then use a default
|
|
|
|
- * value.
|
|
|
|
- */
|
|
|
|
- if (is_66mhz)
|
|
|
|
- ltimer = 16;
|
|
|
|
- else
|
|
|
|
- ltimer = 32;
|
|
|
|
- } else {
|
|
|
|
- int shift_factor;
|
|
|
|
-
|
|
|
|
- if (is_66mhz)
|
|
|
|
- shift_factor = 2;
|
|
|
|
- else
|
|
|
|
- shift_factor = 3;
|
|
|
|
-
|
|
|
|
- /* Use a default value when the min_gnt value
|
|
|
|
- * is erroneously high.
|
|
|
|
- */
|
|
|
|
- if (((unsigned int) min_gnt << shift_factor) > 512 ||
|
|
|
|
- ((min_gnt << shift_factor) & 0xff) == 0) {
|
|
|
|
- ltimer = 8 << shift_factor;
|
|
|
|
- } else {
|
|
|
|
- ltimer = min_gnt << shift_factor;
|
|
|
|
- }
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- pci_write_config_byte(pdev, PCI_LATENCY_TIMER, ltimer);
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-void pci_determine_66mhz_disposition(struct pci_pbm_info *pbm,
|
|
|
|
- struct pci_bus *pbus)
|
|
|
|
-{
|
|
|
|
- struct pci_dev *pdev;
|
|
|
|
- int all_are_66mhz;
|
|
|
|
- u16 status;
|
|
|
|
-
|
|
|
|
- if (pbm->is_66mhz_capable == 0) {
|
|
|
|
- all_are_66mhz = 0;
|
|
|
|
- goto out;
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- all_are_66mhz = 1;
|
|
|
|
- list_for_each_entry(pdev, &pbus->devices, bus_list) {
|
|
|
|
- pci_read_config_word(pdev, PCI_STATUS, &status);
|
|
|
|
- if (!(status & PCI_STATUS_66MHZ)) {
|
|
|
|
- all_are_66mhz = 0;
|
|
|
|
- break;
|
|
|
|
- }
|
|
|
|
- }
|
|
|
|
-out:
|
|
|
|
- pbm->all_devs_66mhz = all_are_66mhz;
|
|
|
|
-
|
|
|
|
- printk("PCI%d(PBM%c): Bus running at %dMHz\n",
|
|
|
|
- pbm->parent->index,
|
|
|
|
- (pbm == &pbm->parent->pbm_A) ? 'A' : 'B',
|
|
|
|
- (all_are_66mhz ? 66 : 33));
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-void pci_setup_busmastering(struct pci_pbm_info *pbm,
|
|
|
|
- struct pci_bus *pbus)
|
|
|
|
-{
|
|
|
|
- struct pci_dev *dev;
|
|
|
|
- struct pci_bus *bus;
|
|
|
|
- int is_66mhz;
|
|
|
|
-
|
|
|
|
- is_66mhz = pbm->is_66mhz_capable && pbm->all_devs_66mhz;
|
|
|
|
-
|
|
|
|
- list_for_each_entry(dev, &pbus->devices, bus_list)
|
|
|
|
- pdev_setup_busmastering(dev, is_66mhz);
|
|
|
|
-
|
|
|
|
- list_for_each_entry(bus, &pbus->children, node)
|
|
|
|
- pci_setup_busmastering(pbm, bus);
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
void pci_register_legacy_regions(struct resource *io_res,
|
|
void pci_register_legacy_regions(struct resource *io_res,
|
|
struct resource *mem_res)
|
|
struct resource *mem_res)
|
|
{
|
|
{
|