X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fpci%2Fsetup-res.c;h=7d35cdf4579f2f92ca8c5293053dad43511042ea;hb=9950c1b5b4b86d4aae12853c2f0a0ef11d976764;hp=ab78e4bbdd83044bc6bb6a3f32e4d7ea3834bf52;hpb=ae3e0218621db0590163b2d5c424ef1f340e3cc6;p=linux-2.6-omap-h63xx.git diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c index ab78e4bbdd8..7d35cdf4579 100644 --- a/drivers/pci/setup-res.c +++ b/drivers/pci/setup-res.c @@ -33,17 +33,30 @@ pci_update_resource(struct pci_dev *dev, struct resource *res, int resno) u32 new, check, mask; int reg; - /* Ignore resources for unimplemented BARs and unused resource slots - for 64 bit BARs. */ + /* + * Ignore resources for unimplemented BARs and unused resource slots + * for 64 bit BARs. + */ if (!res->flags) return; + /* + * Ignore non-moveable resources. This might be legacy resources for + * which no functional BAR register exists or another important + * system resource we should better not move around in system address + * space. + */ + if (res->flags & IORESOURCE_PCI_FIXED) + return; + pcibios_resource_to_bus(dev, ®ion, res); - pr_debug(" got res [%llx:%llx] bus [%lx:%lx] flags %lx for " + pr_debug(" got res [%llx:%llx] bus [%llx:%llx] flags %lx for " "BAR %d of %s\n", (unsigned long long)res->start, (unsigned long long)res->end, - region.start, region.end, res->flags, resno, pci_name(dev)); + (unsigned long long)region.start, + (unsigned long long)region.end, + (unsigned long)res->flags, resno, pci_name(dev)); new = region.start | (res->flags & PCI_REGION_FLAG_MASK); if (res->flags & IORESOURCE_IO) @@ -90,8 +103,7 @@ pci_update_resource(struct pci_dev *dev, struct resource *res, int resno) new & ~PCI_REGION_FLAG_MASK); } -int __devinit -pci_claim_resource(struct pci_dev *dev, int resource) +int pci_claim_resource(struct pci_dev *dev, int resource) { struct resource *res = &dev->resource[resource]; struct resource *root = NULL; @@ -115,7 +127,6 @@ pci_claim_resource(struct pci_dev *dev, int resource) return err; } -EXPORT_SYMBOL_GPL(pci_claim_resource); int pci_assign_resource(struct pci_dev *dev, int resno) { @@ -126,10 +137,16 @@ int pci_assign_resource(struct pci_dev *dev, int resno) size = res->end - res->start + 1; min = (res->flags & IORESOURCE_IO) ? PCIBIOS_MIN_IO : PCIBIOS_MIN_MEM; - /* The bridge resources are special, as their - size != alignment. Sizing routines return - required alignment in the "start" field. */ - align = (resno < PCI_BRIDGE_RESOURCES) ? size : res->start; + + align = resource_alignment(res); + if (!align) { + printk(KERN_ERR "PCI: Cannot allocate resource (bogus " + "alignment) %d [%llx:%llx] (flags %lx) of %s\n", + resno, (unsigned long long)res->start, + (unsigned long long)res->end, res->flags, + pci_name(dev)); + return -EINVAL; + } /* First, try exact prefetching match.. */ ret = pci_bus_alloc_resource(bus, res, size, align, min, @@ -153,14 +170,16 @@ int pci_assign_resource(struct pci_dev *dev, int resno) res->flags & IORESOURCE_IO ? "I/O" : "mem", resno, (unsigned long long)size, (unsigned long long)res->start, pci_name(dev)); - } else if (resno < PCI_BRIDGE_RESOURCES) { - pci_update_resource(dev, res, resno); + } else { + res->flags &= ~IORESOURCE_STARTALIGN; + if (resno < PCI_BRIDGE_RESOURCES) + pci_update_resource(dev, res, resno); } return ret; } -#ifdef CONFIG_EMBEDDED +#if 0 int pci_assign_resource_fixed(struct pci_dev *dev, int resno) { struct pci_bus *bus = dev->bus; @@ -201,8 +220,7 @@ EXPORT_SYMBOL_GPL(pci_assign_resource_fixed); #endif /* Sort resources by alignment */ -void __devinit -pdev_sort_resources(struct pci_dev *dev, struct resource_list *head) +void pdev_sort_resources(struct pci_dev *dev, struct resource_list *head) { int i; @@ -212,29 +230,29 @@ pdev_sort_resources(struct pci_dev *dev, struct resource_list *head) resource_size_t r_align; r = &dev->resource[i]; - r_align = r->end - r->start; - + + if (r->flags & IORESOURCE_PCI_FIXED) + continue; + if (!(r->flags) || r->parent) continue; + + r_align = resource_alignment(r); if (!r_align) { - printk(KERN_WARNING "PCI: Ignore bogus resource %d " - "[%llx:%llx] of %s\n", + printk(KERN_WARNING "PCI: bogus alignment of resource " + "%d [%llx:%llx] (flags %lx) of %s\n", i, (unsigned long long)r->start, - (unsigned long long)r->end, pci_name(dev)); + (unsigned long long)r->end, r->flags, + pci_name(dev)); continue; } - r_align = (i < PCI_BRIDGE_RESOURCES) ? r_align + 1 : r->start; for (list = head; ; list = list->next) { resource_size_t align = 0; struct resource_list *ln = list->next; - int idx; - if (ln) { - idx = ln->res - &ln->dev->resource[0]; - align = (idx < PCI_BRIDGE_RESOURCES) ? - ln->res->end - ln->res->start + 1 : - ln->res->start; - } + if (ln) + align = resource_alignment(ln->res); + if (r_align > align) { tmp = kmalloc(sizeof(*tmp), GFP_KERNEL); if (!tmp) @@ -249,3 +267,46 @@ pdev_sort_resources(struct pci_dev *dev, struct resource_list *head) } } } + +int pci_enable_resources(struct pci_dev *dev, int mask) +{ + u16 cmd, old_cmd; + int i; + struct resource *r; + + pci_read_config_word(dev, PCI_COMMAND, &cmd); + old_cmd = cmd; + + for (i = 0; i < PCI_NUM_RESOURCES; i++) { + if (!(mask & (1 << i))) + continue; + + r = &dev->resource[i]; + + if (!(r->flags & (IORESOURCE_IO | IORESOURCE_MEM))) + continue; + if ((i == PCI_ROM_RESOURCE) && + (!(r->flags & IORESOURCE_ROM_ENABLE))) + continue; + + if (!r->parent) { + dev_err(&dev->dev, "device not available because of " + "BAR %d [%llx:%llx] collisions\n", i, + (unsigned long long) r->start, + (unsigned long long) r->end); + return -EINVAL; + } + + if (r->flags & IORESOURCE_IO) + cmd |= PCI_COMMAND_IO; + if (r->flags & IORESOURCE_MEM) + cmd |= PCI_COMMAND_MEMORY; + } + + if (cmd != old_cmd) { + dev_info(&dev->dev, "enabling device (%04x -> %04x)\n", + old_cmd, cmd); + pci_write_config_word(dev, PCI_COMMAND, cmd); + } + return 0; +}