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Diffstat (limited to 'arch/powerpc/kernel/pci_32.c')
-rw-r--r--arch/powerpc/kernel/pci_32.c67
1 files changed, 52 insertions, 15 deletions
diff --git a/arch/powerpc/kernel/pci_32.c b/arch/powerpc/kernel/pci_32.c
index 41c86c6b6e4d..f8a3bd8cfae4 100644
--- a/arch/powerpc/kernel/pci_32.c
+++ b/arch/powerpc/kernel/pci_32.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Common pmac/prep/chrp pci routines. -- Cort
*/
@@ -10,7 +11,8 @@
#include <linux/capability.h>
#include <linux/sched.h>
#include <linux/errno.h>
-#include <linux/bootmem.h>
+#include <linux/memblock.h>
+#include <linux/syscalls.h>
#include <linux/irq.h>
#include <linux/list.h>
#include <linux/of.h>
@@ -19,7 +21,6 @@
#include <asm/processor.h>
#include <asm/io.h>
-#include <asm/prom.h>
#include <asm/sections.h>
#include <asm/pci-bridge.h>
#include <asm/ppc-pci.h>
@@ -35,18 +36,13 @@ int pcibios_assign_bus_offset = 1;
EXPORT_SYMBOL(isa_io_base);
EXPORT_SYMBOL(pci_dram_offset);
-void pcibios_make_OF_bus_map(void);
-
static void fixup_cpc710_pci64(struct pci_dev* dev);
-static u8* pci_to_OF_bus_map;
/* By default, we don't re-assign bus numbers. We do this only on
* some pmacs
*/
static int pci_assign_all_buses;
-static int pci_bus_count;
-
/* This will remain NULL for now, until isa-bridge.c is made common
* to both 32-bit and 64-bit.
*/
@@ -66,6 +62,11 @@ fixup_cpc710_pci64(struct pci_dev* dev)
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CPC710_PCI64, fixup_cpc710_pci64);
+#ifdef CONFIG_PPC_PCI_OF_BUS_MAP
+
+static u8* pci_to_OF_bus_map;
+static int pci_bus_count;
+
/*
* Functions below are used on OpenFirmware machines.
*/
@@ -79,8 +80,8 @@ make_one_node_map(struct device_node* node, u8 pci_bus)
return;
bus_range = of_get_property(node, "bus-range", &len);
if (bus_range == NULL || len < 2 * sizeof(int)) {
- printk(KERN_WARNING "Can't get bus-range for %s, "
- "assuming it starts at 0\n", node->full_name);
+ printk(KERN_WARNING "Can't get bus-range for %pOF, "
+ "assuming it starts at 0\n", node);
pci_to_OF_bus_map[pci_bus] = 0;
} else
pci_to_OF_bus_map[pci_bus] = bus_range[0];
@@ -96,7 +97,8 @@ make_one_node_map(struct device_node* node, u8 pci_bus)
reg = of_get_property(node, "reg", NULL);
if (!reg)
continue;
- dev = pci_get_bus_and_slot(pci_bus, ((reg[0] >> 8) & 0xff));
+ dev = pci_get_domain_bus_and_slot(0, pci_bus,
+ ((reg[0] >> 8) & 0xff));
if (!dev || !dev->subordinate) {
pci_dev_put(dev);
continue;
@@ -106,7 +108,7 @@ make_one_node_map(struct device_node* node, u8 pci_bus)
}
}
-void
+static void __init
pcibios_make_OF_bus_map(void)
{
int i;
@@ -150,14 +152,18 @@ pcibios_make_OF_bus_map(void)
}
#endif
}
+#endif // CONFIG_PPC_PCI_OF_BUS_MAP
+#ifdef CONFIG_PPC_PMAC
/*
* Returns the PCI device matching a given OF node
*/
int pci_device_from_OF_node(struct device_node *node, u8 *bus, u8 *devfn)
{
+#ifdef CONFIG_PPC_PCI_OF_BUS_MAP
struct pci_dev *dev = NULL;
+#endif
const __be32 *reg;
int size;
@@ -172,6 +178,9 @@ int pci_device_from_OF_node(struct device_node *node, u8 *bus, u8 *devfn)
*bus = (be32_to_cpup(&reg[0]) >> 16) & 0xff;
*devfn = (be32_to_cpup(&reg[0]) >> 8) & 0xff;
+#ifndef CONFIG_PPC_PCI_OF_BUS_MAP
+ return 0;
+#else
/* Ok, here we need some tweak. If we have already renumbered
* all busses, we can't rely on the OF bus number any more.
* the pci_to_OF_bus_map is not enough as several PCI busses
@@ -189,9 +198,12 @@ int pci_device_from_OF_node(struct device_node *node, u8 *bus, u8 *devfn)
}
return -ENODEV;
+#endif // CONFIG_PPC_PCI_OF_BUS_MAP
}
EXPORT_SYMBOL(pci_device_from_OF_node);
+#endif
+#ifdef CONFIG_PPC_PCI_OF_BUS_MAP
/* We create the "pci-OF-bus-map" property now so it appears in the
* /proc device tree
*/
@@ -201,7 +213,8 @@ pci_create_OF_bus_map(void)
struct property* of_prop;
struct device_node *dn;
- of_prop = memblock_virt_alloc(sizeof(struct property) + 256, 0);
+ of_prop = memblock_alloc_or_panic(sizeof(struct property) + 256,
+ SMP_CACHE_BYTES);
dn = of_find_node_by_path("/");
if (dn) {
memset(of_prop, -1, sizeof(struct property) + 256);
@@ -212,6 +225,7 @@ pci_create_OF_bus_map(void)
of_node_put(dn);
}
}
+#endif // CONFIG_PPC_PCI_OF_BUS_MAP
void pcibios_setup_phb_io_space(struct pci_controller *hose)
{
@@ -227,23 +241,41 @@ void pcibios_setup_phb_io_space(struct pci_controller *hose)
static int __init pcibios_init(void)
{
struct pci_controller *hose, *tmp;
+#ifndef CONFIG_PPC_PCI_BUS_NUM_DOMAIN_DEPENDENT
int next_busno = 0;
+#endif
printk(KERN_INFO "PCI: Probing PCI hardware\n");
+#ifdef CONFIG_PPC_PCI_BUS_NUM_DOMAIN_DEPENDENT
+ /*
+ * Enable PCI domains in /proc when PCI bus numbers are not unique
+ * across all PCI domains to prevent conflicts. And keep PCI domain 0
+ * backward compatible in /proc for video cards.
+ */
+ pci_add_flags(PCI_ENABLE_PROC_DOMAINS | PCI_COMPAT_DOMAIN_0);
+#endif
+
if (pci_has_flag(PCI_REASSIGN_ALL_BUS))
pci_assign_all_buses = 1;
/* Scan all of the recorded PCI controllers. */
list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
+#ifndef CONFIG_PPC_PCI_BUS_NUM_DOMAIN_DEPENDENT
if (pci_assign_all_buses)
hose->first_busno = next_busno;
+#endif
hose->last_busno = 0xff;
pcibios_scan_phb(hose);
pci_bus_add_devices(hose->bus);
+#ifndef CONFIG_PPC_PCI_BUS_NUM_DOMAIN_DEPENDENT
if (pci_assign_all_buses || next_busno <= hose->last_busno)
next_busno = hose->last_busno + pcibios_assign_bus_offset;
+#endif
}
+
+#if defined(CONFIG_PPC_PMAC) || defined(CONFIG_PPC_CHRP)
+#ifdef CONFIG_PPC_PCI_OF_BUS_MAP
pci_bus_count = next_busno;
/* OpenFirmware based machines need a map of OF bus
@@ -252,10 +284,16 @@ static int __init pcibios_init(void)
*/
if (pci_assign_all_buses)
pcibios_make_OF_bus_map();
+#endif
+#endif
/* Call common code to handle resource allocation */
pcibios_resource_survey();
+ /* Call machine dependent fixup */
+ if (ppc_md.pcibios_fixup)
+ ppc_md.pcibios_fixup();
+
/* Call machine dependent post-init code */
if (ppc_md.pcibios_after_init)
ppc_md.pcibios_after_init();
@@ -282,7 +320,8 @@ pci_bus_to_hose(int bus)
* Note that the returned IO or memory base is a physical address
*/
-long sys_pciconfig_iobase(long which, unsigned long bus, unsigned long devfn)
+SYSCALL_DEFINE3(pciconfig_iobase, long, which,
+ unsigned long, bus, unsigned long, devfn)
{
struct pci_controller* hose;
long result = -EOPNOTSUPP;
@@ -306,5 +345,3 @@ long sys_pciconfig_iobase(long which, unsigned long bus, unsigned long devfn)
return result;
}
-
-
generated by cgit (git 2.34.1) at 2025-12-25 12:44:30 +0000