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Diffstat (limited to 'arch/sparc64/kernel/pci_common.c')
-rw-r--r--arch/sparc64/kernel/pci_common.c806
1 files changed, 97 insertions, 709 deletions
diff --git a/arch/sparc64/kernel/pci_common.c b/arch/sparc64/kernel/pci_common.c
index 5a92cb90ebe0..1e6aeedf43c4 100644
--- a/arch/sparc64/kernel/pci_common.c
+++ b/arch/sparc64/kernel/pci_common.c
@@ -1,7 +1,6 @@
-/* $Id: pci_common.c,v 1.29 2002/02/01 00:56:03 davem Exp $
- * pci_common.c: PCI controller common support.
+/* pci_common.c: PCI controller common support.
*
- * Copyright (C) 1999 David S. Miller (davem@redhat.com)
+ * Copyright (C) 1999, 2007 David S. Miller (davem@davemloft.net)
*/
#include <linux/string.h>
@@ -16,748 +15,137 @@
#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)
+static void pci_register_legacy_regions(struct resource *io_res,
+ struct resource *mem_res)
{
- 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;
-}
+ struct resource *p;
-/* 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;
+ /* VGA Video RAM. */
+ p = kzalloc(sizeof(*p), GFP_KERNEL);
+ if (!p)
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);
+ p->name = "Video RAM area";
+ p->start = mem_res->start + 0xa0000UL;
+ p->end = p->start + 0x1ffffUL;
+ p->flags = IORESOURCE_BUSY;
+ request_resource(mem_res, p);
-/* 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);
+ p = kzalloc(sizeof(*p), GFP_KERNEL);
+ if (!p)
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;
+ p->name = "System ROM";
+ p->start = mem_res->start + 0xf0000UL;
+ p->end = p->start + 0xffffUL;
+ p->flags = IORESOURCE_BUSY;
+ request_resource(mem_res, p);
- list_for_each_entry(dev, &pbus->devices, bus_list)
- pdev_record_assignments(pbm, dev);
+ p = kzalloc(sizeof(*p), GFP_KERNEL);
+ if (!p)
+ return;
- list_for_each_entry(bus, &pbus->children, node)
- pci_record_assignments(pbm, bus);
+ p->name = "Video ROM";
+ p->start = mem_res->start + 0xc0000UL;
+ p->end = p->start + 0x7fffUL;
+ p->flags = IORESOURCE_BUSY;
+ request_resource(mem_res, p);
}
-/* 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)
+static void pci_register_iommu_region(struct pci_pbm_info *pbm)
{
- int class = pdev->class >> 8;
+ const u32 *vdma = of_get_property(pbm->prom_node, "virtual-dma", NULL);
- 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;
+ if (vdma) {
+ struct resource *rp = kmalloc(sizeof(*rp), GFP_KERNEL);
- 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));
+ if (!rp) {
+ prom_printf("Cannot allocate IOMMU resource.\n");
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);
- 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)));
+ rp->name = "IOMMU";
+ rp->start = pbm->mem_space.start + (unsigned long) vdma[0];
+ rp->end = rp->start + (unsigned long) vdma[1] - 1UL;
+ rp->flags = IORESOURCE_BUSY;
+ request_resource(&pbm->mem_space, rp);
}
}
-void __init pci_assign_unassigned(struct pci_pbm_info *pbm,
- struct pci_bus *pbus)
+void pci_determine_mem_io_space(struct pci_pbm_info *pbm)
{
- struct pci_dev *dev;
- struct pci_bus *bus;
-
- list_for_each_entry(dev, &pbus->devices, bus_list)
- pdev_assign_unassigned(pbm, dev);
+ const struct linux_prom_pci_ranges *pbm_ranges;
+ int i, saw_mem, saw_io;
+ int num_pbm_ranges;
- list_for_each_entry(bus, &pbus->children, node)
- pci_assign_unassigned(pbm, bus);
-}
+ saw_mem = saw_io = 0;
+ pbm_ranges = of_get_property(pbm->prom_node, "ranges", &i);
+ num_pbm_ranges = i / sizeof(*pbm_ranges);
-static void __init pdev_fixup_irq(struct pci_dev *pdev)
-{
- struct pcidev_cookie *pcp = pdev->sysdata;
- struct of_device *op = pcp->op;
+ for (i = 0; i < num_pbm_ranges; i++) {
+ const struct linux_prom_pci_ranges *pr = &pbm_ranges[i];
+ unsigned long a;
+ u32 parent_phys_hi, parent_phys_lo;
+ int type;
- if (op->irqs[0] == 0xffffffff) {
- pdev->irq = PCI_IRQ_NONE;
- return;
- }
+ parent_phys_hi = pr->parent_phys_hi;
+ parent_phys_lo = pr->parent_phys_lo;
+ if (tlb_type == hypervisor)
+ parent_phys_hi &= 0x0fffffff;
- pdev->irq = op->irqs[0];
+ type = (pr->child_phys_hi >> 24) & 0x3;
+ a = (((unsigned long)parent_phys_hi << 32UL) |
+ ((unsigned long)parent_phys_lo << 0UL));
- 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, &ltimer);
- 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;
- }
- }
+ switch (type) {
+ case 0:
+ /* PCI config space, 16MB */
+ pbm->config_space = a;
+ break;
- pci_write_config_byte(pdev, PCI_LATENCY_TIMER, ltimer);
-}
+ case 1:
+ /* 16-bit IO space, 16MB */
+ pbm->io_space.start = a;
+ pbm->io_space.end = a + ((16UL*1024UL*1024UL) - 1UL);
+ pbm->io_space.flags = IORESOURCE_IO;
+ saw_io = 1;
+ break;
-void pci_determine_66mhz_disposition(struct pci_pbm_info *pbm,
- struct pci_bus *pbus)
-{
- struct pci_dev *pdev;
- int all_are_66mhz;
- u16 status;
+ case 2:
+ /* 32-bit MEM space, 2GB */
+ pbm->mem_space.start = a;
+ pbm->mem_space.end = a + (0x80000000UL - 1UL);
+ pbm->mem_space.flags = IORESOURCE_MEM;
+ saw_mem = 1;
+ break;
- if (pbm->is_66mhz_capable == 0) {
- all_are_66mhz = 0;
- goto out;
- }
+ case 3:
+ /* XXX 64-bit MEM handling XXX */
- 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;
+ default:
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,
- struct resource *mem_res)
-{
- struct resource *p;
-
- /* VGA Video RAM. */
- p = kzalloc(sizeof(*p), GFP_KERNEL);
- if (!p)
- return;
- p->name = "Video RAM area";
- p->start = mem_res->start + 0xa0000UL;
- p->end = p->start + 0x1ffffUL;
- p->flags = IORESOURCE_BUSY;
- request_resource(mem_res, p);
+ if (!saw_io || !saw_mem) {
+ prom_printf("%s: Fatal error, missing %s PBM range.\n",
+ pbm->name,
+ (!saw_io ? "IO" : "MEM"));
+ prom_halt();
+ }
- p = kzalloc(sizeof(*p), GFP_KERNEL);
- if (!p)
- return;
+ printk("%s: PCI IO[%lx] MEM[%lx]\n",
+ pbm->name,
+ pbm->io_space.start,
+ pbm->mem_space.start);
- p->name = "System ROM";
- p->start = mem_res->start + 0xf0000UL;
- p->end = p->start + 0xffffUL;
- p->flags = IORESOURCE_BUSY;
- request_resource(mem_res, p);
+ pbm->io_space.name = pbm->mem_space.name = pbm->name;
- p = kzalloc(sizeof(*p), GFP_KERNEL);
- if (!p)
- return;
+ request_resource(&ioport_resource, &pbm->io_space);
+ request_resource(&iomem_resource, &pbm->mem_space);
- p->name = "Video ROM";
- p->start = mem_res->start + 0xc0000UL;
- p->end = p->start + 0x7fffUL;
- p->flags = IORESOURCE_BUSY;
- request_resource(mem_res, p);
+ pci_register_legacy_regions(&pbm->io_space,
+ &pbm->mem_space);
+ pci_register_iommu_region(pbm);
}
/* Generic helper routines for PCI error reporting. */
generated by cgit v1.2.3 (git 2.0.4) at 2024-12-30 21:05:27 +0000