Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * This file is subject to the terms and conditions of the GNU General Public |
| 3 | * License. See the file "COPYING" in the main directory of this archive |
| 4 | * for more details. |
| 5 | * |
| 6 | * Copyright (C) 2001-2004 Silicon Graphics, Inc. All rights reserved. |
| 7 | */ |
| 8 | |
| 9 | #include <linux/types.h> |
| 10 | #include <linux/interrupt.h> |
| 11 | #include <linux/pci.h> |
| 12 | #include <asm/sn/sn_sal.h> |
| 13 | #include "xtalk/xwidgetdev.h" |
| 14 | #include <asm/sn/geo.h> |
| 15 | #include "xtalk/hubdev.h" |
Mark Maule | 9b08ebd | 2005-04-25 11:32:16 -0700 | [diff] [blame^] | 16 | #include <asm/sn/pcibus_provider_defs.h> |
| 17 | #include <asm/sn/pcidev.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include "pci/pcibr_provider.h" |
| 19 | #include <asm/sn/addrs.h> |
| 20 | |
| 21 | |
| 22 | static int sal_pcibr_error_interrupt(struct pcibus_info *soft) |
| 23 | { |
| 24 | struct ia64_sal_retval ret_stuff; |
| 25 | uint64_t busnum; |
| 26 | int segment; |
| 27 | ret_stuff.status = 0; |
| 28 | ret_stuff.v0 = 0; |
| 29 | |
| 30 | segment = 0; |
| 31 | busnum = soft->pbi_buscommon.bs_persist_busnum; |
| 32 | SAL_CALL_NOLOCK(ret_stuff, |
| 33 | (u64) SN_SAL_IOIF_ERROR_INTERRUPT, |
| 34 | (u64) segment, (u64) busnum, 0, 0, 0, 0, 0); |
| 35 | |
| 36 | return (int)ret_stuff.v0; |
| 37 | } |
| 38 | |
| 39 | /* |
| 40 | * PCI Bridge Error interrupt handler. Gets invoked whenever a PCI |
| 41 | * bridge sends an error interrupt. |
| 42 | */ |
| 43 | static irqreturn_t |
| 44 | pcibr_error_intr_handler(int irq, void *arg, struct pt_regs *regs) |
| 45 | { |
| 46 | struct pcibus_info *soft = (struct pcibus_info *)arg; |
| 47 | |
| 48 | if (sal_pcibr_error_interrupt(soft) < 0) { |
| 49 | panic("pcibr_error_intr_handler(): Fatal Bridge Error"); |
| 50 | } |
| 51 | return IRQ_HANDLED; |
| 52 | } |
| 53 | |
| 54 | void * |
| 55 | pcibr_bus_fixup(struct pcibus_bussoft *prom_bussoft) |
| 56 | { |
| 57 | int nasid, cnode, j; |
| 58 | struct hubdev_info *hubdev_info; |
| 59 | struct pcibus_info *soft; |
| 60 | struct sn_flush_device_list *sn_flush_device_list; |
| 61 | |
| 62 | if (! IS_PCI_BRIDGE_ASIC(prom_bussoft->bs_asic_type)) { |
| 63 | return NULL; |
| 64 | } |
| 65 | |
| 66 | /* |
| 67 | * Allocate kernel bus soft and copy from prom. |
| 68 | */ |
| 69 | |
| 70 | soft = kmalloc(sizeof(struct pcibus_info), GFP_KERNEL); |
| 71 | if (!soft) { |
| 72 | return NULL; |
| 73 | } |
| 74 | |
| 75 | memcpy(soft, prom_bussoft, sizeof(struct pcibus_info)); |
| 76 | soft->pbi_buscommon.bs_base = |
| 77 | (((u64) soft->pbi_buscommon. |
| 78 | bs_base << 4) >> 4) | __IA64_UNCACHED_OFFSET; |
| 79 | |
| 80 | spin_lock_init(&soft->pbi_lock); |
| 81 | |
| 82 | /* |
| 83 | * register the bridge's error interrupt handler |
| 84 | */ |
| 85 | if (request_irq(SGI_PCIBR_ERROR, (void *)pcibr_error_intr_handler, |
| 86 | SA_SHIRQ, "PCIBR error", (void *)(soft))) { |
| 87 | printk(KERN_WARNING |
| 88 | "pcibr cannot allocate interrupt for error handler\n"); |
| 89 | } |
| 90 | |
| 91 | /* |
| 92 | * Update the Bridge with the "kernel" pagesize |
| 93 | */ |
| 94 | if (PAGE_SIZE < 16384) { |
| 95 | pcireg_control_bit_clr(soft, PCIBR_CTRL_PAGE_SIZE); |
| 96 | } else { |
| 97 | pcireg_control_bit_set(soft, PCIBR_CTRL_PAGE_SIZE); |
| 98 | } |
| 99 | |
| 100 | nasid = NASID_GET(soft->pbi_buscommon.bs_base); |
| 101 | cnode = nasid_to_cnodeid(nasid); |
| 102 | hubdev_info = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo); |
| 103 | |
| 104 | if (hubdev_info->hdi_flush_nasid_list.widget_p) { |
| 105 | sn_flush_device_list = hubdev_info->hdi_flush_nasid_list. |
| 106 | widget_p[(int)soft->pbi_buscommon.bs_xid]; |
| 107 | if (sn_flush_device_list) { |
| 108 | for (j = 0; j < DEV_PER_WIDGET; |
| 109 | j++, sn_flush_device_list++) { |
| 110 | if (sn_flush_device_list->sfdl_slot == -1) |
| 111 | continue; |
| 112 | if (sn_flush_device_list-> |
| 113 | sfdl_persistent_busnum == |
| 114 | soft->pbi_buscommon.bs_persist_busnum) |
| 115 | sn_flush_device_list->sfdl_pcibus_info = |
| 116 | soft; |
| 117 | } |
| 118 | } |
| 119 | } |
| 120 | |
| 121 | /* Setup the PMU ATE map */ |
| 122 | soft->pbi_int_ate_resource.lowest_free_index = 0; |
| 123 | soft->pbi_int_ate_resource.ate = |
| 124 | kmalloc(soft->pbi_int_ate_size * sizeof(uint64_t), GFP_KERNEL); |
| 125 | memset(soft->pbi_int_ate_resource.ate, 0, |
| 126 | (soft->pbi_int_ate_size * sizeof(uint64_t))); |
| 127 | |
| 128 | return soft; |
| 129 | } |
| 130 | |
| 131 | void pcibr_force_interrupt(struct sn_irq_info *sn_irq_info) |
| 132 | { |
| 133 | struct pcidev_info *pcidev_info; |
| 134 | struct pcibus_info *pcibus_info; |
| 135 | int bit = sn_irq_info->irq_int_bit; |
| 136 | |
| 137 | pcidev_info = (struct pcidev_info *)sn_irq_info->irq_pciioinfo; |
| 138 | if (pcidev_info) { |
| 139 | pcibus_info = |
| 140 | (struct pcibus_info *)pcidev_info->pdi_host_pcidev_info-> |
| 141 | pdi_pcibus_info; |
| 142 | pcireg_force_intr_set(pcibus_info, bit); |
| 143 | } |
| 144 | } |
| 145 | |
| 146 | void pcibr_change_devices_irq(struct sn_irq_info *sn_irq_info) |
| 147 | { |
| 148 | struct pcidev_info *pcidev_info; |
| 149 | struct pcibus_info *pcibus_info; |
| 150 | int bit = sn_irq_info->irq_int_bit; |
| 151 | uint64_t xtalk_addr = sn_irq_info->irq_xtalkaddr; |
| 152 | |
| 153 | pcidev_info = (struct pcidev_info *)sn_irq_info->irq_pciioinfo; |
| 154 | if (pcidev_info) { |
| 155 | pcibus_info = |
| 156 | (struct pcibus_info *)pcidev_info->pdi_host_pcidev_info-> |
| 157 | pdi_pcibus_info; |
| 158 | |
| 159 | /* Disable the device's IRQ */ |
| 160 | pcireg_intr_enable_bit_clr(pcibus_info, bit); |
| 161 | |
| 162 | /* Change the device's IRQ */ |
| 163 | pcireg_intr_addr_addr_set(pcibus_info, bit, xtalk_addr); |
| 164 | |
| 165 | /* Re-enable the device's IRQ */ |
| 166 | pcireg_intr_enable_bit_set(pcibus_info, bit); |
| 167 | |
| 168 | pcibr_force_interrupt(sn_irq_info); |
| 169 | } |
| 170 | } |
Mark Maule | e955d82 | 2005-04-25 11:26:03 -0700 | [diff] [blame] | 171 | |
| 172 | /* |
| 173 | * Provider entries for PIC/CP |
| 174 | */ |
| 175 | |
| 176 | struct sn_pcibus_provider pcibr_provider = { |
| 177 | .dma_map = pcibr_dma_map, |
| 178 | .dma_map_consistent = pcibr_dma_map_consistent, |
| 179 | .dma_unmap = pcibr_dma_unmap, |
| 180 | .bus_fixup = pcibr_bus_fixup, |
| 181 | }; |
| 182 | |
| 183 | int |
| 184 | pcibr_init_provider(void) |
| 185 | { |
| 186 | sn_pci_provider[PCIIO_ASIC_TYPE_PIC] = &pcibr_provider; |
| 187 | sn_pci_provider[PCIIO_ASIC_TYPE_TIOCP] = &pcibr_provider; |
| 188 | |
| 189 | return 0; |
| 190 | } |