From dad32bbf43b496bcd32a83f73a1e7fd0a02cfd3e Mon Sep 17 00:00:00 2001 From: John Rose Date: Thu, 23 Jun 2005 17:09:54 +1000 Subject: [PATCH] pSeries - read irqs dynamically For I/O DLPAR to work properly, the kernel needs to allow for dynamic assignment of the irq field of the pci_dev structure upon dynamic bus addition. This patch moves the assignment of that field from pSeries_final_fixup() to pcibios_fixup_bus(), which enables dynamic assignment for the children of a newly added bus. Currently, pci_devs receive their irq numbers in one of two ways. The irq line is either read at boot for all pci_devs, or read by the rpaphp module at slot enable time. The latter is no longer sufficient for DLPAR addition of slots that don't qualify as PCI-hotplug capable. This solution handles the cases of boot and dynamic add. Signed-off-by: John Rose Signed-off-by: Paul Mackerras --- arch/ppc64/kernel/pSeries_pci.c | 35 ++++++++++++++++++++--------------- 1 file changed, 20 insertions(+), 15 deletions(-) (limited to 'arch/ppc64/kernel/pSeries_pci.c') diff --git a/arch/ppc64/kernel/pSeries_pci.c b/arch/ppc64/kernel/pSeries_pci.c index dfa6d3d3e9f0..1f5f141fb7a1 100644 --- a/arch/ppc64/kernel/pSeries_pci.c +++ b/arch/ppc64/kernel/pSeries_pci.c @@ -32,7 +32,7 @@ #include "pci.h" -static int __initdata s7a_workaround; +static int __initdata s7a_workaround = -1; #if 0 void pcibios_name_device(struct pci_dev *dev) @@ -65,6 +65,7 @@ static void __init check_s7a(void) struct device_node *root; char *model; + s7a_workaround = 0; root = of_find_node_by_path("/"); if (root) { model = get_property(root, "model", NULL); @@ -74,6 +75,24 @@ static void __init check_s7a(void) } } +void __devinit pSeries_irq_bus_setup(struct pci_bus *bus) +{ + struct pci_dev *dev; + + if (s7a_workaround < 0) + check_s7a(); + list_for_each_entry(dev, &bus->devices, bus_list) { + pci_read_irq_line(dev); + if (s7a_workaround) { + if (dev->irq > 16) { + dev->irq -= 3; + pci_write_config_byte(dev, PCI_INTERRUPT_LINE, + dev->irq); + } + } + } +} + static void __init pSeries_request_regions(void) { if (!isa_io_base) @@ -89,20 +108,6 @@ static void __init pSeries_request_regions(void) void __init pSeries_final_fixup(void) { - struct pci_dev *dev = NULL; - - check_s7a(); - - for_each_pci_dev(dev) { - pci_read_irq_line(dev); - if (s7a_workaround) { - if (dev->irq > 16) { - dev->irq -= 3; - pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq); - } - } - } - phbs_remap_io(); pSeries_request_regions(); -- cgit v1.2.2