Commit f90bb153 authored by Benjamin Herrenschmidt's avatar Benjamin Herrenschmidt Committed by Paul Mackerras
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[POWERPC] Make pci_read_irq_line the default



This patch reworks the way IRQs are fixed up on PCI for arch powerpc.

It makes pci_read_irq_line() called by default in the PCI code for
devices that are probed, and add an optional per-device fixup in
ppc_md for platforms that really need to correct what they obtain
from pci_read_irq_line().

It also removes ppc_md.irq_bus_setup which was only used by pSeries
and should not be needed anymore.

I've also removed the pSeries s7a workaround as it can't work with
the current interrupt code anyway. I'm trying to get one of these
machines working so I can test a proper fix for that problem.

I also haven't updated the old-style fixup code from 85xx_cds.c
because it's actually buggy :) It assigns pci_dev->irq hard coded
numbers which is no good with the new IRQ mapping code. It should
at least use irq_create_mapping(NULL, hard_coded_number); and possibly
also set_irq_type() to set them as level low.
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent 34ba8a5c
......@@ -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>
......@@ -1338,6 +1339,7 @@ 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 +1392,16 @@ 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)
......
......@@ -1215,8 +1215,12 @@ static void __devinit do_bus_setup(struct pci_bus *bus)
list_for_each_entry(dev, &bus->devices, bus_list)
ppc_md.iommu_dev_setup(dev);
if (ppc_md.irq_bus_setup)
ppc_md.irq_bus_setup(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);
}
}
void __devinit pcibios_fixup_bus(struct pci_bus *bus)
......
......@@ -515,16 +515,6 @@ static int m82xx_pci_exclude_device(u_char bus, u_char devfn)
return PCIBIOS_SUCCESSFUL;
}
static void
__init mpc82xx_pcibios_fixup(void)
{
struct pci_dev *dev = NULL;
for_each_pci_dev(dev) {
pci_read_irq_line(dev);
}
}
void __init add_bridge(struct device_node *np)
{
int len;
......@@ -597,9 +587,6 @@ static void __init mpc82xx_ads_setup_arch(void)
add_bridge(np);
of_node_put(np);
ppc_md.pci_map_irq = NULL;
ppc_md.pcibios_fixup = mpc82xx_pcibios_fixup;
ppc_md.pcibios_fixup_bus = NULL;
#endif
#ifdef CONFIG_ROOT_NFS
......
......@@ -118,7 +118,4 @@ define_machine(mpc834x_itx) {
.time_init = mpc83xx_time_init,
.calibrate_decr = generic_calibrate_decr,
.progress = udbg_progress,
#ifdef CONFIG_PCI
.pcibios_fixup = mpc83xx_pcibios_fixup,
#endif
};
......@@ -137,7 +137,4 @@ define_machine(mpc834x_sys) {
.time_init = mpc83xx_time_init,
.calibrate_decr = generic_calibrate_decr,
.progress = udbg_progress,
#ifdef CONFIG_PCI
.pcibios_fixup = mpc83xx_pcibios_fixup,
#endif
};
......@@ -11,7 +11,6 @@
extern int add_bridge(struct device_node *dev);
extern int mpc83xx_exclude_device(u_char bus, u_char devfn);
extern void mpc83xx_pcibios_fixup(void);
extern void mpc83xx_restart(char *cmd);
extern long mpc83xx_time_init(void);
......
......@@ -45,15 +45,6 @@ int mpc83xx_exclude_device(u_char bus, u_char devfn)
return PCIBIOS_SUCCESSFUL;
}
void __init mpc83xx_pcibios_fixup(void)
{
struct pci_dev *dev = NULL;
/* map all the PCI irqs */
for_each_pci_dev(dev)
pci_read_irq_line(dev);
}
int __init add_bridge(struct device_node *dev)
{
int len;
......
......@@ -53,15 +53,6 @@ mpc85xx_exclude_device(u_char bus, u_char devfn)
else
return PCIBIOS_SUCCESSFUL;
}
void __init
mpc85xx_pcibios_fixup(void)
{
struct pci_dev *dev = NULL;
for_each_pci_dev(dev)
pci_read_irq_line(dev);
}
#endif /* CONFIG_PCI */
#ifdef CONFIG_CPM2
......@@ -253,8 +244,6 @@ static void __init mpc85xx_ads_setup_arch(void)
#ifdef CONFIG_PCI
for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;)
add_bridge(np);
ppc_md.pcibios_fixup = mpc85xx_pcibios_fixup;
ppc_md.pci_exclude_device = mpc85xx_exclude_device;
#endif
......
......@@ -398,15 +398,6 @@ mpc86xx_hpcn_show_cpuinfo(struct seq_file *m)
}
void __init mpc86xx_hpcn_pcibios_fixup(void)
{
struct pci_dev *dev = NULL;
for_each_pci_dev(dev)
pci_read_irq_line(dev);
}
/*
* Called very early, device-tree isn't unflattened
*/
......@@ -461,7 +452,6 @@ define_machine(mpc86xx_hpcn) {
.setup_arch = mpc86xx_hpcn_setup_arch,
.init_IRQ = mpc86xx_hpcn_init_irq,
.show_cpuinfo = mpc86xx_hpcn_show_cpuinfo,
.pcibios_fixup = mpc86xx_hpcn_pcibios_fixup,
.get_irq = mpic_get_irq,
.restart = mpc86xx_restart,
.time_init = mpc86xx_time_init,
......
......@@ -80,14 +80,6 @@ static void cell_progress(char *s, unsigned short hex)
printk("*** %04x : %s\n", hex, s ? s : "");
}
static void __init cell_pcibios_fixup(void)
{
struct pci_dev *dev = NULL;
for_each_pci_dev(dev)
pci_read_irq_line(dev);
}
static void __init cell_init_irq(void)
{
iic_init_IRQ();
......@@ -180,7 +172,6 @@ define_machine(cell) {
.check_legacy_ioport = cell_check_legacy_ioport,
.progress = cell_progress,
.init_IRQ = cell_init_irq,
.pcibios_fixup = cell_pcibios_fixup,
#ifdef CONFIG_KEXEC
.machine_kexec = default_machine_kexec,
.machine_kexec_prepare = default_machine_kexec_prepare,
......
......@@ -9,4 +9,3 @@ extern long chrp_time_init(void);
extern void chrp_find_bridges(void);
extern void chrp_event_scan(unsigned long);
extern void chrp_pcibios_fixup(void);
......@@ -156,15 +156,6 @@ hydra_init(void)
return 1;
}
void __init
chrp_pcibios_fixup(void)
{
struct pci_dev *dev = NULL;
for_each_pci_dev(dev)
pci_read_irq_line(dev);
}
#define PRG_CL_RESET_VALID 0x00010000
static void __init
......
......@@ -600,7 +600,6 @@ define_machine(chrp) {
.init = chrp_init2,
.show_cpuinfo = chrp_show_cpuinfo,
.init_IRQ = chrp_init_IRQ,
.pcibios_fixup = chrp_pcibios_fixup,
.restart = rtas_restart,
.power_off = rtas_power_off,
.halt = rtas_halt,
......
......@@ -89,7 +89,7 @@ u8 find_slot_by_devfn(unsigned int *interrupt_map, unsigned int devfn)
/*
* Scans the interrupt map for pci device
*/
void mpc7448_hpc2_fixup_irq(struct pci_dev *dev)
void __devinit mpc7448_hpc2_fixup_irq(struct pci_dev *dev)
{
struct pci_controller *hose;
struct device_node *node;
......@@ -117,19 +117,13 @@ void mpc7448_hpc2_fixup_irq(struct pci_dev *dev)
pin = 1;
pin--;
dev->irq = interrupt[slot*4*7 + pin*7 + 5];
pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
DBG("TSI_PCI: dev->irq = 0x%x\n", dev->irq);
}
/* temporary pci irq map fixup*/
void __init mpc7448_hpc2_pcibios_fixup(void)
{
struct pci_dev *dev = NULL;
for_each_pci_dev(dev) {
mpc7448_hpc2_fixup_irq(dev);
pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
}
}
static void __init mpc7448_hpc2_setup_arch(void)
{
struct device_node *cpu;
......@@ -300,7 +294,7 @@ define_machine(mpc7448_hpc2){
.init_IRQ = mpc7448_hpc2_init_IRQ,
.show_cpuinfo = mpc7448_hpc2_show_cpuinfo,
.get_irq = mpic_get_irq,
.pcibios_fixup = mpc7448_hpc2_pcibios_fixup,
.pci_irq_fixup = mpc7448_hpc2_fixup_irq,
.restart = mpc7448_hpc2_restart,
.calibrate_decr = generic_calibrate_decr,
.machine_check_exception= mpc7448_machine_check_exception,
......
......@@ -8,5 +8,5 @@ extern void maple_get_rtc_time(struct rtc_time *tm);
extern unsigned long maple_get_boot_time(void);
extern void maple_calibrate_decr(void);
extern void maple_pci_init(void);
extern void maple_pcibios_fixup(void);
extern void maple_pci_irq_fixup(struct pci_dev *dev);
extern int maple_pci_get_legacy_ide_irq(struct pci_dev *dev, int channel);
......@@ -502,38 +502,29 @@ static int __init add_bridge(struct device_node *dev)
}
void __init maple_pcibios_fixup(void)
void __devinit maple_pci_irq_fixup(struct pci_dev *dev)
{
struct pci_dev *dev = NULL;
DBG(" -> maple_pcibios_fixup\n");
for_each_pci_dev(dev) {
/* Fixup IRQ for PCIe host */
if (u4_pcie != NULL && dev->bus->number == 0 &&
pci_bus_to_host(dev->bus) == u4_pcie) {
printk(KERN_DEBUG "Fixup U4 PCIe IRQ\n");
dev->irq = irq_create_mapping(NULL, 1);
if (dev->irq != NO_IRQ)
set_irq_type(dev->irq, IRQ_TYPE_LEVEL_LOW);
continue;
}
/* Hide AMD8111 IDE interrupt when in legacy mode so
* the driver calls pci_get_legacy_ide_irq()
*/
if (dev->vendor == PCI_VENDOR_ID_AMD &&
dev->device == PCI_DEVICE_ID_AMD_8111_IDE &&
(dev->class & 5) != 5) {
dev->irq = NO_IRQ;
continue;
}
DBG(" -> maple_pci_irq_fixup\n");
/* Fixup IRQ for PCIe host */
if (u4_pcie != NULL && dev->bus->number == 0 &&
pci_bus_to_host(dev->bus) == u4_pcie) {
printk(KERN_DEBUG "Fixup U4 PCIe IRQ\n");
dev->irq = irq_create_mapping(NULL, 1);
if (dev->irq != NO_IRQ)
set_irq_type(dev->irq, IRQ_TYPE_LEVEL_LOW);
}
/* For all others, map the interrupt from the device-tree */
pci_read_irq_line(dev);
/* Hide AMD8111 IDE interrupt when in legacy mode so
* the driver calls pci_get_legacy_ide_irq()
*/
if (dev->vendor == PCI_VENDOR_ID_AMD &&
dev->device == PCI_DEVICE_ID_AMD_8111_IDE &&
(dev->class & 5) != 5) {
dev->irq = NO_IRQ;
}
DBG(" <- maple_pcibios_fixup\n");
DBG(" <- maple_pci_irq_fixup\n");
}
static void __init maple_fixup_phb_resources(void)
......
......@@ -312,7 +312,7 @@ define_machine(maple_md) {
.setup_arch = maple_setup_arch,
.init_early = maple_init_early,
.init_IRQ = maple_init_IRQ,
.pcibios_fixup = maple_pcibios_fixup,
.pci_irq_fixup = maple_pci_irq_fixup,
.pci_get_legacy_ide_irq = maple_pci_get_legacy_ide_irq,
.restart = maple_restart,
.power_off = maple_power_off,
......
......@@ -3,6 +3,5 @@
extern unsigned long pas_get_boot_time(void);
extern void pas_pci_init(void);
extern void pas_pcibios_fixup(void);
#endif /* _PASEMI_PASEMI_H */
......@@ -148,14 +148,6 @@ static int __init add_bridge(struct device_node *dev)
}
void __init pas_pcibios_fixup(void)
{
struct pci_dev *dev = NULL;
for_each_pci_dev(dev)
pci_read_irq_line(dev);
}
static void __init pas_fixup_phb_resources(void)
{
struct pci_controller *hose, *tmp;
......
......@@ -176,7 +176,6 @@ define_machine(pas) {
.init_early = pas_init_early,
.init_IRQ = pas_init_IRQ,
.get_irq = mpic_get_irq,
.pcibios_fixup = pas_pcibios_fixup,
.restart = pas_restart,
.power_off = pas_power_off,
.halt = pas_halt,
......
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