diff options
| author | Prarit Bhargava <prarit@sgi.com> | 2005-07-06 14:59:44 -0700 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2005-07-06 14:59:44 -0700 |
| commit | cb4cb2cb9b0b14bdf2fc7125e099ed7e818cea42 (patch) | |
| tree | 11e110ce3201e0cbd3e30f1d4a1b0dc6ebe19bfa /arch/ia64/sn/kernel/io_init.c | |
| parent | bd53d1270f51c6cfb53b06c8f93fd42327871d6b (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.c | 39 |
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 783eb4323847..2f03e3f52b63 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 |