diff options
Diffstat (limited to 'arch/ia64/sn/pci/pcibr/pcibr_provider.c')
| -rw-r--r-- | arch/ia64/sn/pci/pcibr/pcibr_provider.c | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/arch/ia64/sn/pci/pcibr/pcibr_provider.c b/arch/ia64/sn/pci/pcibr/pcibr_provider.c new file mode 100644 index 000000000000..92bd278cf7ff --- /dev/null +++ b/arch/ia64/sn/pci/pcibr/pcibr_provider.c @@ -0,0 +1,170 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 2001-2004 Silicon Graphics, Inc. All rights reserved. + */ + +#include <linux/types.h> +#include <linux/interrupt.h> +#include <linux/pci.h> +#include <asm/sn/sn_sal.h> +#include "xtalk/xwidgetdev.h" +#include <asm/sn/geo.h> +#include "xtalk/hubdev.h" +#include "pci/pcibus_provider_defs.h" +#include "pci/pcidev.h" +#include "pci/pcibr_provider.h" +#include <asm/sn/addrs.h> + + +static int sal_pcibr_error_interrupt(struct pcibus_info *soft) +{ + struct ia64_sal_retval ret_stuff; + uint64_t busnum; + int segment; + ret_stuff.status = 0; + ret_stuff.v0 = 0; + + segment = 0; + busnum = soft->pbi_buscommon.bs_persist_busnum; + SAL_CALL_NOLOCK(ret_stuff, + (u64) SN_SAL_IOIF_ERROR_INTERRUPT, + (u64) segment, (u64) busnum, 0, 0, 0, 0, 0); + + return (int)ret_stuff.v0; +} + +/* + * PCI Bridge Error interrupt handler. Gets invoked whenever a PCI + * bridge sends an error interrupt. + */ +static irqreturn_t +pcibr_error_intr_handler(int irq, void *arg, struct pt_regs *regs) +{ + struct pcibus_info *soft = (struct pcibus_info *)arg; + + if (sal_pcibr_error_interrupt(soft) < 0) { + panic("pcibr_error_intr_handler(): Fatal Bridge Error"); + } + return IRQ_HANDLED; +} + +void * +pcibr_bus_fixup(struct pcibus_bussoft *prom_bussoft) +{ + int nasid, cnode, j; + struct hubdev_info *hubdev_info; + struct pcibus_info *soft; + struct sn_flush_device_list *sn_flush_device_list; + + if (! IS_PCI_BRIDGE_ASIC(prom_bussoft->bs_asic_type)) { + return NULL; + } + + /* + * Allocate kernel bus soft and copy from prom. + */ + + soft = kmalloc(sizeof(struct pcibus_info), GFP_KERNEL); + if (!soft) { + return NULL; + } + + memcpy(soft, prom_bussoft, sizeof(struct pcibus_info)); + soft->pbi_buscommon.bs_base = + (((u64) soft->pbi_buscommon. + bs_base << 4) >> 4) | __IA64_UNCACHED_OFFSET; + + spin_lock_init(&soft->pbi_lock); + + /* + * register the bridge's error interrupt handler + */ + if (request_irq(SGI_PCIBR_ERROR, (void *)pcibr_error_intr_handler, + SA_SHIRQ, "PCIBR error", (void *)(soft))) { + printk(KERN_WARNING + "pcibr cannot allocate interrupt for error handler\n"); + } + + /* + * Update the Bridge with the "kernel" pagesize + */ + if (PAGE_SIZE < 16384) { + pcireg_control_bit_clr(soft, PCIBR_CTRL_PAGE_SIZE); + } else { + pcireg_control_bit_set(soft, PCIBR_CTRL_PAGE_SIZE); + } + + nasid = NASID_GET(soft->pbi_buscommon.bs_base); + cnode = nasid_to_cnodeid(nasid); + hubdev_info = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo); + + if (hubdev_info->hdi_flush_nasid_list.widget_p) { + sn_flush_device_list = hubdev_info->hdi_flush_nasid_list. + widget_p[(int)soft->pbi_buscommon.bs_xid]; + if (sn_flush_device_list) { + for (j = 0; j < DEV_PER_WIDGET; + j++, sn_flush_device_list++) { + if (sn_flush_device_list->sfdl_slot == -1) + continue; + if (sn_flush_device_list-> + sfdl_persistent_busnum == + soft->pbi_buscommon.bs_persist_busnum) + sn_flush_device_list->sfdl_pcibus_info = + soft; + } + } + } + + /* Setup the PMU ATE map */ + soft->pbi_int_ate_resource.lowest_free_index = 0; + soft->pbi_int_ate_resource.ate = + kmalloc(soft->pbi_int_ate_size * sizeof(uint64_t), GFP_KERNEL); + memset(soft->pbi_int_ate_resource.ate, 0, + (soft->pbi_int_ate_size * sizeof(uint64_t))); + + return soft; +} + +void pcibr_force_interrupt(struct sn_irq_info *sn_irq_info) +{ + struct pcidev_info *pcidev_info; + struct pcibus_info *pcibus_info; + int bit = sn_irq_info->irq_int_bit; + + pcidev_info = (struct pcidev_info *)sn_irq_info->irq_pciioinfo; + if (pcidev_info) { + pcibus_info = + (struct pcibus_info *)pcidev_info->pdi_host_pcidev_info-> + pdi_pcibus_info; + pcireg_force_intr_set(pcibus_info, bit); + } +} + +void pcibr_change_devices_irq(struct sn_irq_info *sn_irq_info) +{ + struct pcidev_info *pcidev_info; + struct pcibus_info *pcibus_info; + int bit = sn_irq_info->irq_int_bit; + uint64_t xtalk_addr = sn_irq_info->irq_xtalkaddr; + + pcidev_info = (struct pcidev_info *)sn_irq_info->irq_pciioinfo; + if (pcidev_info) { + pcibus_info = + (struct pcibus_info *)pcidev_info->pdi_host_pcidev_info-> + pdi_pcibus_info; + + /* Disable the device's IRQ */ + pcireg_intr_enable_bit_clr(pcibus_info, bit); + + /* Change the device's IRQ */ + pcireg_intr_addr_addr_set(pcibus_info, bit, xtalk_addr); + + /* Re-enable the device's IRQ */ + pcireg_intr_enable_bit_set(pcibus_info, bit); + + pcibr_force_interrupt(sn_irq_info); + } +} |