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Diffstat (limited to 'arch/powerpc/kernel/pci_32.c')
-rw-r--r--arch/powerpc/kernel/pci_32.c237
1 files changed, 112 insertions, 125 deletions
diff --git a/arch/powerpc/kernel/pci_32.c b/arch/powerpc/kernel/pci_32.c
index 0d9ff72e2852..2847cd51a2d7 100644
--- a/arch/powerpc/kernel/pci_32.c
+++ b/arch/powerpc/kernel/pci_32.c
@@ -12,6 +12,7 @@
#include <linux/errno.h>
#include <linux/bootmem.h>
#include <linux/irq.h>
+#include <linux/list.h>
#include <asm/processor.h>
#include <asm/io.h>
@@ -99,7 +100,7 @@ pcibios_fixup_resources(struct pci_dev *dev)
continue;
if (res->end == 0xffffffff) {
DBG("PCI:%s Resource %d [%016llx-%016llx] is unassigned\n",
- pci_name(dev), i, res->start, res->end);
+ pci_name(dev), i, (u64)res->start, (u64)res->end);
res->end -= res->start;
res->start = 0;
res->flags |= IORESOURCE_UNSET;
@@ -115,11 +116,9 @@ pcibios_fixup_resources(struct pci_dev *dev)
if (offset != 0) {
res->start += offset;
res->end += offset;
-#ifdef DEBUG
- printk("Fixup res %d (%lx) of dev %s: %llx -> %llx\n",
- i, res->flags, pci_name(dev),
- res->start - offset, res->start);
-#endif
+ DBG("Fixup res %d (%lx) of dev %s: %llx -> %llx\n",
+ i, res->flags, pci_name(dev),
+ (u64)res->start - offset, (u64)res->start);
}
}
@@ -255,7 +254,7 @@ pcibios_allocate_bus_resources(struct list_head *bus_list)
}
DBG("PCI: bridge rsrc %llx..%llx (%lx), parent %p\n",
- res->start, res->end, res->flags, pr);
+ (u64)res->start, (u64)res->end, res->flags, pr);
if (pr) {
if (request_resource(pr, res) == 0)
continue;
@@ -306,7 +305,7 @@ reparent_resources(struct resource *parent, struct resource *res)
for (p = res->child; p != NULL; p = p->sibling) {
p->parent = res;
DBG(KERN_INFO "PCI: reparented %s [%llx..%llx] under %s\n",
- p->name, p->start, p->end, res->name);
+ p->name, (u64)p->start, (u64)p->end, res->name);
}
return 0;
}
@@ -362,7 +361,7 @@ pci_relocate_bridge_resource(struct pci_bus *bus, int i)
}
if (request_resource(pr, res)) {
DBG(KERN_ERR "PCI: huh? couldn't move to %llx..%llx\n",
- res->start, res->end);
+ (u64)res->start, (u64)res->end);
return -1; /* "can't happen" */
}
update_bridge_base(bus, i);
@@ -480,14 +479,14 @@ static inline void alloc_resource(struct pci_dev *dev, int idx)
struct resource *pr, *r = &dev->resource[idx];
DBG("PCI:%s: Resource %d: %016llx-%016llx (f=%lx)\n",
- pci_name(dev), idx, r->start, r->end, r->flags);
+ pci_name(dev), idx, (u64)r->start, (u64)r->end, r->flags);
pr = pci_find_parent_resource(dev, r);
if (!pr || request_resource(pr, r) < 0) {
printk(KERN_ERR "PCI: Cannot allocate resource region %d"
" of device %s\n", idx, pci_name(dev));
if (pr)
DBG("PCI: parent is %p: %016llx-%016llx (f=%lx)\n",
- pr, pr->start, pr->end, pr->flags);
+ pr, (u64)pr->start, (u64)pr->end, pr->flags);
/* We'll assign a new address later */
r->flags |= IORESOURCE_UNSET;
r->end -= r->start;
@@ -671,7 +670,7 @@ pcibios_make_OF_bus_map(void)
struct pci_controller* hose;
struct property *map_prop;
- pci_to_OF_bus_map = (u8*)kmalloc(pci_bus_count, GFP_KERNEL);
+ pci_to_OF_bus_map = kmalloc(pci_bus_count, GFP_KERNEL);
if (!pci_to_OF_bus_map) {
printk(KERN_ERR "Can't allocate OF bus map !\n");
return;
@@ -737,25 +736,51 @@ scan_OF_pci_childs(struct device_node* node, pci_OF_scan_iterator filter, void*
return NULL;
}
-static int
-scan_OF_pci_childs_iterator(struct device_node* node, void* data)
+static struct device_node *scan_OF_for_pci_dev(struct device_node *parent,
+ unsigned int devfn)
{
- const unsigned int *reg;
- u8* fdata = (u8*)data;
-
- reg = get_property(node, "reg", NULL);
- if (reg && ((reg[0] >> 8) & 0xff) == fdata[1]
- && ((reg[0] >> 16) & 0xff) == fdata[0])
- return 1;
- return 0;
+ struct device_node *np = NULL;
+ const u32 *reg;
+ unsigned int psize;
+
+ while ((np = of_get_next_child(parent, np)) != NULL) {
+ reg = get_property(np, "reg", &psize);
+ if (reg == NULL || psize < 4)
+ continue;
+ if (((reg[0] >> 8) & 0xff) == devfn)
+ return np;
+ }
+ return NULL;
}
-static struct device_node*
-scan_OF_childs_for_device(struct device_node* node, u8 bus, u8 dev_fn)
+
+static struct device_node *scan_OF_for_pci_bus(struct pci_bus *bus)
{
- u8 filter_data[2] = {bus, dev_fn};
+ struct device_node *parent, *np;
+
+ /* Are we a root bus ? */
+ if (bus->self == NULL || bus->parent == NULL) {
+ struct pci_controller *hose = pci_bus_to_hose(bus->number);
+ if (hose == NULL)
+ return NULL;
+ return of_node_get(hose->arch_data);
+ }
- return scan_OF_pci_childs(node, scan_OF_pci_childs_iterator, filter_data);
+ /* not a root bus, we need to get our parent */
+ parent = scan_OF_for_pci_bus(bus->parent);
+ if (parent == NULL)
+ return NULL;
+
+ /* now iterate for children for a match */
+ np = scan_OF_for_pci_dev(parent, bus->self->devfn);
+ of_node_put(parent);
+
+ /* sanity check */
+ if (strcmp(np->type, "pci") != 0)
+ printk(KERN_WARNING "pci: wrong type \"%s\" for bridge %s\n",
+ np->type, np->full_name);
+
+ return np;
}
/*
@@ -764,43 +789,25 @@ scan_OF_childs_for_device(struct device_node* node, u8 bus, u8 dev_fn)
struct device_node *
pci_busdev_to_OF_node(struct pci_bus *bus, int devfn)
{
- struct pci_controller *hose;
- struct device_node *node;
- int busnr;
+ struct device_node *parent, *np;
if (!have_of)
return NULL;
-
- /* Lookup the hose */
- busnr = bus->number;
- hose = pci_bus_to_hose(busnr);
- if (!hose)
- return NULL;
- /* Check it has an OF node associated */
- node = (struct device_node *) hose->arch_data;
- if (!node)
+ DBG("pci_busdev_to_OF_node(%d,0x%x)\n", bus->number, devfn);
+ parent = scan_OF_for_pci_bus(bus);
+ if (parent == NULL)
return NULL;
-
- /* Fixup bus number according to what OF think it is. */
-#ifdef CONFIG_PPC_PMAC
- /* The G5 need a special case here. Basically, we don't remap all
- * busses on it so we don't create the pci-OF-map. However, we do
- * remap the AGP bus and so have to deal with it. A future better
- * fix has to be done by making the remapping per-host and always
- * filling the pci_to_OF map. --BenH
+ DBG(" parent is %s\n", parent ? parent->full_name : "<NULL>");
+ np = scan_OF_for_pci_dev(parent, devfn);
+ of_node_put(parent);
+ DBG(" result is %s\n", np ? np->full_name : "<NULL>");
+
+ /* XXX most callers don't release the returned node
+ * mostly because ppc64 doesn't increase the refcount,
+ * we need to fix that.
*/
- if (machine_is(powermac) && busnr >= 0xf0)
- busnr -= 0xf0;
- else
-#endif
- if (pci_to_OF_bus_map)
- busnr = pci_to_OF_bus_map[busnr];
- if (busnr == 0xff)
- return NULL;
-
- /* Now, lookup childs of the hose */
- return scan_OF_childs_for_device(node->child, busnr, devfn);
+ return np;
}
EXPORT_SYMBOL(pci_busdev_to_OF_node);
@@ -960,7 +967,7 @@ pci_process_bridge_OF_ranges(struct pci_controller *hose,
res->flags = IORESOURCE_IO;
res->start = ranges[2];
DBG("PCI: IO 0x%llx -> 0x%llx\n",
- res->start, res->start + size - 1);
+ (u64)res->start, (u64)res->start + size - 1);
break;
case 2: /* memory space */
memno = 0;
@@ -982,7 +989,7 @@ pci_process_bridge_OF_ranges(struct pci_controller *hose,
res->flags |= IORESOURCE_PREFETCH;
res->start = ranges[na+2];
DBG("PCI: MEM[%d] 0x%llx -> 0x%llx\n", memno,
- res->start, res->start + size - 1);
+ (u64)res->start, (u64)res->start + size - 1);
}
break;
}
@@ -1268,7 +1275,10 @@ pcibios_init(void)
if (pci_assign_all_buses)
hose->first_busno = next_busno;
hose->last_busno = 0xff;
- bus = pci_scan_bus(hose->first_busno, hose->ops, hose);
+ bus = pci_scan_bus_parented(hose->parent, hose->first_busno,
+ hose->ops, hose);
+ if (bus)
+ pci_bus_add_devices(bus);
hose->last_busno = bus->subordinate;
if (pci_assign_all_buses || next_busno <= hose->last_busno)
next_busno = hose->last_busno + pcibios_assign_bus_offset;
@@ -1282,10 +1292,6 @@ pcibios_init(void)
if (pci_assign_all_buses && have_of)
pcibios_make_OF_bus_map();
- /* Do machine dependent PCI interrupt routing */
- if (ppc_md.pci_swizzle && ppc_md.pci_map_irq)
- pci_fixup_irqs(ppc_md.pci_swizzle, ppc_md.pci_map_irq);
-
/* Call machine dependent fixup */
if (ppc_md.pcibios_fixup)
ppc_md.pcibios_fixup();
@@ -1308,25 +1314,6 @@ pcibios_init(void)
subsys_initcall(pcibios_init);
-unsigned char __init
-common_swizzle(struct pci_dev *dev, unsigned char *pinp)
-{
- struct pci_controller *hose = dev->sysdata;
-
- if (dev->bus->number != hose->first_busno) {
- u8 pin = *pinp;
- do {
- pin = bridge_swizzle(pin, PCI_SLOT(dev->devfn));
- /* Move up the chain of bridges. */
- dev = dev->bus->self;
- } while (dev->bus->self);
- *pinp = pin;
-
- /* The slot is the idsel of the last bridge. */
- }
- return PCI_SLOT(dev->devfn);
-}
-
unsigned long resource_fixup(struct pci_dev * dev, struct resource * res,
unsigned long start, unsigned long size)
{
@@ -1338,6 +1325,7 @@ void __init pcibios_fixup_bus(struct pci_bus *bus)
struct pci_controller *hose = (struct pci_controller *) bus->sysdata;
unsigned long io_offset;
struct resource *res;
+ struct pci_dev *dev;
int i;
io_offset = (unsigned long)hose->io_base_virt - isa_io_base;
@@ -1390,8 +1378,16 @@ void __init pcibios_fixup_bus(struct pci_bus *bus)
}
}
+ /* Platform specific bus fixups */
if (ppc_md.pcibios_fixup_bus)
ppc_md.pcibios_fixup_bus(bus);
+
+ /* Read default IRQs and fixup if necessary */
+ list_for_each_entry(dev, &bus->devices, bus_list) {
+ pci_read_irq_line(dev);
+ if (ppc_md.pci_irq_fixup)
+ ppc_md.pci_irq_fixup(dev);
+ }
}
char __init *pcibios_setup(char *str)
@@ -1556,7 +1552,7 @@ pci_resource_to_bus(struct pci_dev *pdev, struct resource *res)
static struct resource *__pci_mmap_make_offset(struct pci_dev *dev,
- unsigned long *offset,
+ resource_size_t *offset,
enum pci_mmap_state mmap_state)
{
struct pci_controller *hose = pci_bus_to_hose(dev->bus->number);
@@ -1568,10 +1564,12 @@ static struct resource *__pci_mmap_make_offset(struct pci_dev *dev,
/* If memory, add on the PCI bridge address offset */
if (mmap_state == pci_mmap_mem) {
+#if 0 /* See comment in pci_resource_to_user() for why this is disabled */
*offset += hose->pci_mem_offset;
+#endif
res_bit = IORESOURCE_MEM;
} else {
- io_offset = hose->io_base_virt - ___IO_BASE;
+ io_offset = hose->io_base_virt - (void __iomem *)_IO_BASE;
*offset += io_offset;
res_bit = IORESOURCE_IO;
}
@@ -1636,9 +1634,6 @@ static pgprot_t __pci_mmap_set_pgprot(struct pci_dev *dev, struct resource *rp,
else
prot |= _PAGE_GUARDED;
- printk("PCI map for %s:%llx, prot: %lx\n", pci_name(dev),
- (unsigned long long)rp->start, prot);
-
return __pgprot(prot);
}
@@ -1707,7 +1702,7 @@ int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
enum pci_mmap_state mmap_state,
int write_combine)
{
- unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
+ resource_size_t offset = vma->vm_pgoff << PAGE_SHIFT;
struct resource *rp;
int ret;
@@ -1820,21 +1815,42 @@ void pci_resource_to_user(const struct pci_dev *dev, int bar,
resource_size_t *start, resource_size_t *end)
{
struct pci_controller *hose = pci_bus_to_hose(dev->bus->number);
- unsigned long offset = 0;
+ resource_size_t offset = 0;
if (hose == NULL)
return;
if (rsrc->flags & IORESOURCE_IO)
- offset = ___IO_BASE - hose->io_base_virt + hose->io_base_phys;
+ offset = (unsigned long)hose->io_base_virt - _IO_BASE;
+
+ /* We pass a fully fixed up address to userland for MMIO instead of
+ * a BAR value because X is lame and expects to be able to use that
+ * to pass to /dev/mem !
+ *
+ * That means that we'll have potentially 64 bits values where some
+ * userland apps only expect 32 (like X itself since it thinks only
+ * Sparc has 64 bits MMIO) but if we don't do that, we break it on
+ * 32 bits CHRPs :-(
+ *
+ * Hopefully, the sysfs insterface is immune to that gunk. Once X
+ * has been fixed (and the fix spread enough), we can re-enable the
+ * 2 lines below and pass down a BAR value to userland. In that case
+ * we'll also have to re-enable the matching code in
+ * __pci_mmap_make_offset().
+ *
+ * BenH.
+ */
+#if 0
+ else if (rsrc->flags & IORESOURCE_MEM)
+ offset = hose->pci_mem_offset;
+#endif
- *start = rsrc->start + offset;
- *end = rsrc->end + offset;
+ *start = rsrc->start - offset;
+ *end = rsrc->end - offset;
}
-void __init
-pci_init_resource(struct resource *res, unsigned long start, unsigned long end,
- int flags, char *name)
+void __init pci_init_resource(struct resource *res, resource_size_t start,
+ resource_size_t end, int flags, char *name)
{
res->start = start;
res->end = end;
@@ -1845,35 +1861,6 @@ pci_init_resource(struct resource *res, unsigned long start, unsigned long end,
res->child = NULL;
}
-void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max)
-{
- unsigned long start = pci_resource_start(dev, bar);
- unsigned long len = pci_resource_len(dev, bar);
- unsigned long flags = pci_resource_flags(dev, bar);
-
- if (!len)
- return NULL;
- if (max && len > max)
- len = max;
- if (flags & IORESOURCE_IO)
- return ioport_map(start, len);
- if (flags & IORESOURCE_MEM)
- /* Not checking IORESOURCE_CACHEABLE because PPC does
- * not currently distinguish between ioremap and
- * ioremap_nocache.
- */
- return ioremap(start, len);
- /* What? */
- return NULL;
-}
-
-void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
-{
- /* Nothing to do */
-}
-EXPORT_SYMBOL(pci_iomap);
-EXPORT_SYMBOL(pci_iounmap);
-
unsigned long pci_address_to_pio(phys_addr_t address)
{
struct pci_controller* hose = hose_head;
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-12 11:25:58 +0000