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authorPrarit Bhargava <prarit@sgi.com>2005-07-06 14:59:44 -0700
committerTony Luck <tony.luck@intel.com>2005-07-06 14:59:44 -0700
commitcb4cb2cb9b0b14bdf2fc7125e099ed7e818cea42 (patch)
tree11e110ce3201e0cbd3e30f1d4a1b0dc6ebe19bfa /arch/ia64/sn/kernel/io_init.c
parentbd53d1270f51c6cfb53b06c8f93fd42327871d6b (diff)
[IA64] hotplug/ia64: SN Hotplug Driver: SN IRQ Fixes
This patch fixes the SN IRQ code such that cpu affinity and Hotplug can modify IRQ values. The sn_irq_info structures are now locked using a RCU lock mechanism to avoid lock contention in the lost interrupt WAR code. Signed-off-by: Prarit Bhargava <prarit@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/ia64/sn/kernel/io_init.c')
-rw-r--r--arch/ia64/sn/kernel/io_init.c39
1 files changed, 22 insertions, 17 deletions
diff --git a/arch/ia64/sn/kernel/io_init.c b/arch/ia64/sn/kernel/io_init.c
index 783eb432384..2f03e3f52b6 100644
--- a/arch/ia64/sn/kernel/io_init.c
+++ b/arch/ia64/sn/kernel/io_init.c
@@ -21,7 +21,6 @@
#include <asm/sn/simulator.h>
#include <asm/sn/tioca_provider.h>
-char master_baseio_wid;
nasid_t master_nasid = INVALID_NASID; /* Partition Master */
struct slab_info {
@@ -231,11 +230,13 @@ static void sn_pci_fixup_slot(struct pci_dev *dev)
{
int idx;
int segment = 0;
- uint64_t size;
- struct sn_irq_info *sn_irq_info;
- struct pci_dev *host_pci_dev;
int status = 0;
struct pcibus_bussoft *bs;
+ struct pci_bus *host_pci_bus;
+ struct pci_dev *host_pci_dev;
+ struct sn_irq_info *sn_irq_info;
+ unsigned long size;
+ unsigned int bus_no, devfn;
dev->sysdata = kmalloc(sizeof(struct pcidev_info), GFP_KERNEL);
if (SN_PCIDEV_INFO(dev) <= 0)
@@ -253,7 +254,7 @@ static void sn_pci_fixup_slot(struct pci_dev *dev)
(u64) __pa(SN_PCIDEV_INFO(dev)),
(u64) __pa(sn_irq_info));
if (status)
- BUG(); /* Cannot get platform pci device information information */
+ BUG(); /* Cannot get platform pci device information */
/* Copy over PIO Mapped Addresses */
for (idx = 0; idx <= PCI_ROM_RESOURCE; idx++) {
@@ -275,15 +276,20 @@ static void sn_pci_fixup_slot(struct pci_dev *dev)
dev->resource[idx].parent = &iomem_resource;
}
- /* set up host bus linkages */
- bs = SN_PCIBUS_BUSSOFT(dev->bus);
- host_pci_dev =
- pci_find_slot(SN_PCIDEV_INFO(dev)->pdi_slot_host_handle >> 32,
- SN_PCIDEV_INFO(dev)->
- pdi_slot_host_handle & 0xffffffff);
+ /* Using the PROMs values for the PCI host bus, get the Linux
+ * PCI host_pci_dev struct and set up host bus linkages
+ */
+
+ bus_no = SN_PCIDEV_INFO(dev)->pdi_slot_host_handle >> 32;
+ devfn = SN_PCIDEV_INFO(dev)->pdi_slot_host_handle & 0xffffffff;
+ host_pci_bus = pci_find_bus(pci_domain_nr(dev->bus), bus_no);
+ host_pci_dev = pci_get_slot(host_pci_bus, devfn);
+
+ SN_PCIDEV_INFO(dev)->host_pci_dev = host_pci_dev;
SN_PCIDEV_INFO(dev)->pdi_host_pcidev_info =
- SN_PCIDEV_INFO(host_pci_dev);
+ SN_PCIDEV_INFO(host_pci_dev);
SN_PCIDEV_INFO(dev)->pdi_linux_pcidev = dev;
+ bs = SN_PCIBUS_BUSSOFT(dev->bus);
SN_PCIDEV_INFO(dev)->pdi_pcibus_info = bs;
if (bs && bs->bs_asic_type < PCIIO_ASIC_MAX_TYPES) {
@@ -297,6 +303,9 @@ static void sn_pci_fixup_slot(struct pci_dev *dev)
SN_PCIDEV_INFO(dev)->pdi_sn_irq_info = sn_irq_info;
dev->irq = SN_PCIDEV_INFO(dev)->pdi_sn_irq_info->irq_irq;
sn_irq_fixup(dev, sn_irq_info);
+ } else {
+ SN_PCIDEV_INFO(dev)->pdi_sn_irq_info = NULL;
+ kfree(sn_irq_info);
}
}
@@ -403,11 +412,7 @@ static int __init sn_pci_init(void)
*/
ia64_max_iommu_merge_mask = ~PAGE_MASK;
sn_fixup_ionodes();
- sn_irq = kmalloc(sizeof(struct sn_irq_info *) * NR_IRQS, GFP_KERNEL);
- if (sn_irq <= 0)
- BUG(); /* Canno afford to run out of memory. */
- memset(sn_irq, 0, sizeof(struct sn_irq_info *) * NR_IRQS);
-
+ sn_irq_lh_init();
sn_init_cpei_timer();
#ifdef CONFIG_PROC_FS