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authorLinus Torvalds <torvalds@linux-foundation.org>2009-09-15 09:51:09 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-09-15 09:51:09 -0700
commit723e9db7a46e328527cc3da2b478b831184fe828 (patch)
treecdeda255633057dcb4c84097bed27b2bbf76970f /arch/powerpc/kernel/pci-common.c
parentada3fa15057205b7d3f727bba5cd26b5912e350f (diff)
parentd331d8305cba713605854aab63a000fb892353a7 (diff)
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (134 commits) powerpc/nvram: Enable use Generic NVRAM driver for different size chips powerpc/iseries: Fix oops reading from /proc/iSeries/mf/*/cmdline powerpc/ps3: Workaround for flash memory I/O error powerpc/booke: Don't set DABR on 64-bit BookE, use DAC1 instead powerpc/perf_counters: Reduce stack usage of power_check_constraints powerpc: Fix bug where perf_counters breaks oprofile powerpc/85xx: Fix SMP compile error and allow NULL for smp_ops powerpc/irq: Improve nanodoc powerpc: Fix some late PowerMac G5 with PCIe ATI graphics powerpc/fsl-booke: Use HW PTE format if CONFIG_PTE_64BIT powerpc/book3e: Add missing page sizes powerpc/pseries: Fix to handle slb resize across migration powerpc/powermac: Thermal control turns system off too eagerly powerpc/pci: Merge ppc32 and ppc64 versions of phb_scan() powerpc/405ex: support cuImage via included dtb powerpc/405ex: provide necessary fixup function to support cuImage powerpc/40x: Add support for the ESTeem 195E (PPC405EP) SBC powerpc/44x: Add Eiger AMCC (AppliedMicro) PPC460SX evaluation board support. powerpc/44x: Update Arches defconfig powerpc/44x: Update Arches dts ... Fix up conflicts in drivers/char/agp/uninorth-agp.c
Diffstat (limited to 'arch/powerpc/kernel/pci-common.c')
-rw-r--r--arch/powerpc/kernel/pci-common.c133
1 files changed, 122 insertions, 11 deletions
diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index 5a56e97c5ac..e9f4840096b 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -50,14 +50,14 @@ resource_size_t isa_mem_base;
unsigned int ppc_pci_flags = 0;
-static struct dma_mapping_ops *pci_dma_ops = &dma_direct_ops;
+static struct dma_map_ops *pci_dma_ops = &dma_direct_ops;
-void set_pci_dma_ops(struct dma_mapping_ops *dma_ops)
+void set_pci_dma_ops(struct dma_map_ops *dma_ops)
{
pci_dma_ops = dma_ops;
}
-struct dma_mapping_ops *get_pci_dma_ops(void)
+struct dma_map_ops *get_pci_dma_ops(void)
{
return pci_dma_ops;
}
@@ -176,8 +176,6 @@ int pci_domain_nr(struct pci_bus *bus)
}
EXPORT_SYMBOL(pci_domain_nr);
-#ifdef CONFIG_PPC_OF
-
/* This routine is meant to be used early during boot, when the
* PCI bus numbers have not yet been assigned, and you need to
* issue PCI config cycles to an OF device.
@@ -210,17 +208,11 @@ static ssize_t pci_show_devspec(struct device *dev,
return sprintf(buf, "%s", np->full_name);
}
static DEVICE_ATTR(devspec, S_IRUGO, pci_show_devspec, NULL);
-#endif /* CONFIG_PPC_OF */
/* Add sysfs properties */
int pcibios_add_platform_entries(struct pci_dev *pdev)
{
-#ifdef CONFIG_PPC_OF
return device_create_file(&pdev->dev, &dev_attr_devspec);
-#else
- return 0;
-#endif /* CONFIG_PPC_OF */
-
}
char __devinit *pcibios_setup(char *str)
@@ -1626,3 +1618,122 @@ void __devinit pcibios_setup_phb_resources(struct pci_controller *hose)
}
+/*
+ * Null PCI config access functions, for the case when we can't
+ * find a hose.
+ */
+#define NULL_PCI_OP(rw, size, type) \
+static int \
+null_##rw##_config_##size(struct pci_dev *dev, int offset, type val) \
+{ \
+ return PCIBIOS_DEVICE_NOT_FOUND; \
+}
+
+static int
+null_read_config(struct pci_bus *bus, unsigned int devfn, int offset,
+ int len, u32 *val)
+{
+ return PCIBIOS_DEVICE_NOT_FOUND;
+}
+
+static int
+null_write_config(struct pci_bus *bus, unsigned int devfn, int offset,
+ int len, u32 val)
+{
+ return PCIBIOS_DEVICE_NOT_FOUND;
+}
+
+static struct pci_ops null_pci_ops =
+{
+ .read = null_read_config,
+ .write = null_write_config,
+};
+
+/*
+ * These functions are used early on before PCI scanning is done
+ * and all of the pci_dev and pci_bus structures have been created.
+ */
+static struct pci_bus *
+fake_pci_bus(struct pci_controller *hose, int busnr)
+{
+ static struct pci_bus bus;
+
+ if (hose == 0) {
+ printk(KERN_ERR "Can't find hose for PCI bus %d!\n", busnr);
+ }
+ bus.number = busnr;
+ bus.sysdata = hose;
+ bus.ops = hose? hose->ops: &null_pci_ops;
+ return &bus;
+}
+
+#define EARLY_PCI_OP(rw, size, type) \
+int early_##rw##_config_##size(struct pci_controller *hose, int bus, \
+ int devfn, int offset, type value) \
+{ \
+ return pci_bus_##rw##_config_##size(fake_pci_bus(hose, bus), \
+ devfn, offset, value); \
+}
+
+EARLY_PCI_OP(read, byte, u8 *)
+EARLY_PCI_OP(read, word, u16 *)
+EARLY_PCI_OP(read, dword, u32 *)
+EARLY_PCI_OP(write, byte, u8)
+EARLY_PCI_OP(write, word, u16)
+EARLY_PCI_OP(write, dword, u32)
+
+extern int pci_bus_find_capability (struct pci_bus *bus, unsigned int devfn, int cap);
+int early_find_capability(struct pci_controller *hose, int bus, int devfn,
+ int cap)
+{
+ return pci_bus_find_capability(fake_pci_bus(hose, bus), devfn, cap);
+}
+
+/**
+ * pci_scan_phb - Given a pci_controller, setup and scan the PCI bus
+ * @hose: Pointer to the PCI host controller instance structure
+ * @sysdata: value to use for sysdata pointer. ppc32 and ppc64 differ here
+ *
+ * Note: the 'data' pointer is a temporary measure. As 32 and 64 bit
+ * pci code gets merged, this parameter should become unnecessary because
+ * both will use the same value.
+ */
+void __devinit pcibios_scan_phb(struct pci_controller *hose, void *sysdata)
+{
+ struct pci_bus *bus;
+ struct device_node *node = hose->dn;
+ int mode;
+
+ pr_debug("PCI: Scanning PHB %s\n",
+ node ? node->full_name : "<NO NAME>");
+
+ /* Create an empty bus for the toplevel */
+ bus = pci_create_bus(hose->parent, hose->first_busno, hose->ops,
+ sysdata);
+ if (bus == NULL) {
+ pr_err("Failed to create bus for PCI domain %04x\n",
+ hose->global_number);
+ return;
+ }
+ bus->secondary = hose->first_busno;
+ hose->bus = bus;
+
+ /* Get some IO space for the new PHB */
+ pcibios_setup_phb_io_space(hose);
+
+ /* Wire up PHB bus resources */
+ pcibios_setup_phb_resources(hose);
+
+ /* Get probe mode and perform scan */
+ mode = PCI_PROBE_NORMAL;
+ if (node && ppc_md.pci_probe_mode)
+ mode = ppc_md.pci_probe_mode(bus);
+ pr_debug(" probe mode: %d\n", mode);
+ if (mode == PCI_PROBE_DEVTREE) {
+ bus->subordinate = hose->last_busno;
+ of_scan_bus(node, bus);
+ }
+
+ if (mode == PCI_PROBE_NORMAL)
+ hose->last_busno = bus->subordinate = pci_scan_child_bus(bus);
+}