arch/ia64/sn/pci/pcibr/pcibr_provider.c

   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/interrupt.h>
  10 #include <linux/types.h>
  11 #include <linux/pci.h>
  12 #include <asm/sn/addrs.h>
  13 #include <asm/sn/geo.h>
  14 #include <asm/sn/pcibr_provider.h>
  15 #include <asm/sn/pcibus_provider_defs.h>
  16 #include <asm/sn/pcidev.h>
  17 #include <asm/sn/sn_sal.h>
  18 #include <asm/sn/sn2/sn_hwperf.h>
  19 #include "xtalk/xwidgetdev.h"
  20 #include "xtalk/hubdev.h"
  21
  22 int
  23 sal_pcibr_slot_enable(struct pcibus_info *soft, int device, void *resp)
  24 {
  25         struct ia64_sal_retval ret_stuff;
  26         u64 busnum;
  27         u64 segment;
  28
  29         ret_stuff.status = 0;
  30         ret_stuff.v0 = 0;
  31
  32         segment = soft->pbi_buscommon.bs_persist_segment;
  33         busnum = soft->pbi_buscommon.bs_persist_busnum;
  34         SAL_CALL_NOLOCK(ret_stuff, (u64) SN_SAL_IOIF_SLOT_ENABLE, segment,
  35                         busnum, (u64) device, (u64) resp, 0, 0, 0);
  36
  37         return (int)ret_stuff.v0;
  38 }
  39
  40 int
  41 sal_pcibr_slot_disable(struct pcibus_info *soft, int device, int action,
  42                        void *resp)
  43 {
  44         struct ia64_sal_retval ret_stuff;
  45         u64 busnum;
  46         u64 segment;
  47
  48         ret_stuff.status = 0;
  49         ret_stuff.v0 = 0;
  50
  51         segment = soft->pbi_buscommon.bs_persist_segment;
  52         busnum = soft->pbi_buscommon.bs_persist_busnum;
  53         SAL_CALL_NOLOCK(ret_stuff, (u64) SN_SAL_IOIF_SLOT_DISABLE,
  54                         segment, busnum, (u64) device, (u64) action,
  55                         (u64) resp, 0, 0);
  56
  57         return (int)ret_stuff.v0;
  58 }
  59
  60 static int sal_pcibr_error_interrupt(struct pcibus_info *soft)
  61 {
  62         struct ia64_sal_retval ret_stuff;
  63         u64 busnum;
  64         int segment;
  65         ret_stuff.status = 0;
  66         ret_stuff.v0 = 0;
  67
  68         segment = soft->pbi_buscommon.bs_persist_segment;
  69         busnum = soft->pbi_buscommon.bs_persist_busnum;
  70         SAL_CALL_NOLOCK(ret_stuff,
  71                         (u64) SN_SAL_IOIF_ERROR_INTERRUPT,
  72                         (u64) segment, (u64) busnum, 0, 0, 0, 0, 0);
  73
  74         return (int)ret_stuff.v0;
  75 }
  76
  77 u16 sn_ioboard_to_pci_bus(struct pci_bus *pci_bus)
  78 {
  79         s64 rc;
  80         u16 ioboard;
  81         nasid_t nasid = NASID_GET(SN_PCIBUS_BUSSOFT(pci_bus)->bs_base);
  82
  83         rc = ia64_sn_sysctl_ioboard_get(nasid, &ioboard);
  84         if (rc) {
  85                 printk(KERN_WARNING "ia64_sn_sysctl_ioboard_get failed: %ld\n",
  86                        rc);
  87                 return 0;
  88         }
  89
  90         return ioboard;
  91 }
  92
  93 /*
  94  * PCI Bridge Error interrupt handler.  Gets invoked whenever a PCI
  95  * bridge sends an error interrupt.
  96  */
  97 static irqreturn_t
  98 pcibr_error_intr_handler(int irq, void *arg, struct pt_regs *regs)
  99 {
 100         struct pcibus_info *soft = (struct pcibus_info *)arg;
 101
 102         if (sal_pcibr_error_interrupt(soft) < 0) {
 103                 panic("pcibr_error_intr_handler(): Fatal Bridge Error");
 104         }
 105         return IRQ_HANDLED;
 106 }
 107
 108 void *
 109 pcibr_bus_fixup(struct pcibus_bussoft *prom_bussoft, struct pci_controller *controller)
 110 {
 111         int nasid, cnode, j;
 112         cnodeid_t near_cnode;
 113         struct hubdev_info *hubdev_info;
 114         struct pcibus_info *soft;
 115         struct sn_flush_device_kernel *sn_flush_device_kernel;
 116         struct sn_flush_device_common *common;
 117
 118         if (! IS_PCI_BRIDGE_ASIC(prom_bussoft->bs_asic_type)) {
 119                 return NULL;
 120         }
 121
 122         /*
 123          * Allocate kernel bus soft and copy from prom.
 124          */
 125
 126         soft = kmalloc(sizeof(struct pcibus_info), GFP_KERNEL);
 127         if (!soft) {
 128                 return NULL;
 129         }
 130
 131         memcpy(soft, prom_bussoft, sizeof(struct pcibus_info));
 132         soft->pbi_buscommon.bs_base =
 133             (((u64) soft->pbi_buscommon.
 134               bs_base << 4) >> 4) | __IA64_UNCACHED_OFFSET;
 135
 136         spin_lock_init(&soft->pbi_lock);
 137
 138         /*
 139          * register the bridge's error interrupt handler
 140          */
 141         if (request_irq(SGI_PCIASIC_ERROR, (void *)pcibr_error_intr_handler,
 142                         IRQF_SHARED, "PCIBR error", (void *)(soft))) {
 143                 printk(KERN_WARNING
 144                        "pcibr cannot allocate interrupt for error handler\n");
 145         }
 146
 147         /*
 148          * Update the Bridge with the "kernel" pagesize
 149          */
 150         if (PAGE_SIZE < 16384) {
 151                 pcireg_control_bit_clr(soft, PCIBR_CTRL_PAGE_SIZE);
 152         } else {
 153                 pcireg_control_bit_set(soft, PCIBR_CTRL_PAGE_SIZE);
 154         }
 155
 156         nasid = NASID_GET(soft->pbi_buscommon.bs_base);
 157         cnode = nasid_to_cnodeid(nasid);
 158         hubdev_info = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
 159
 160         if (hubdev_info->hdi_flush_nasid_list.widget_p) {
 161                 sn_flush_device_kernel = hubdev_info->hdi_flush_nasid_list.
 162                     widget_p[(int)soft->pbi_buscommon.bs_xid];
 163                 if (sn_flush_device_kernel) {
 164                         for (j = 0; j < DEV_PER_WIDGET;
 165                              j++, sn_flush_device_kernel++) {
 166                                 common = sn_flush_device_kernel->common;
 167                                 if (common->sfdl_slot == -1)
 168                                         continue;
 169                                 if ((common->sfdl_persistent_segment ==
 170                                      soft->pbi_buscommon.bs_persist_segment) &&
 171                                      (common->sfdl_persistent_busnum ==
 172                                      soft->pbi_buscommon.bs_persist_busnum))
 173                                         common->sfdl_pcibus_info =
 174                                             soft;
 175                         }
 176                 }
 177         }
 178
 179         /* Setup the PMU ATE map */
 180         soft->pbi_int_ate_resource.lowest_free_index = 0;
 181         soft->pbi_int_ate_resource.ate =
 182             kzalloc(soft->pbi_int_ate_size * sizeof(u64), GFP_KERNEL);
 183
 184         if (!soft->pbi_int_ate_resource.ate) {
 185                 kfree(soft);
 186                 return NULL;
 187         }
 188
 189         if (prom_bussoft->bs_asic_type == PCIIO_ASIC_TYPE_TIOCP) {
 190                 /* TIO PCI Bridge: find nearest node with CPUs */
 191                 int e = sn_hwperf_get_nearest_node(cnode, NULL, &near_cnode);
 192
 193                 if (e < 0) {
 194                         near_cnode = (cnodeid_t)-1; /* use any node */
 195                         printk(KERN_WARNING "pcibr_bus_fixup: failed to find "
 196                                 "near node with CPUs to TIO node %d, err=%d\n",
 197                                 cnode, e);
 198                 }
 199                 controller->node = near_cnode;
 200         }
 201         else
 202                 controller->node = cnode;
 203         return soft;
 204 }
 205
 206 void pcibr_force_interrupt(struct sn_irq_info *sn_irq_info)
 207 {
 208         struct pcidev_info *pcidev_info;
 209         struct pcibus_info *pcibus_info;
 210         int bit = sn_irq_info->irq_int_bit;
 211
 212         if (! sn_irq_info->irq_bridge)
 213                 return;
 214
 215         pcidev_info = (struct pcidev_info *)sn_irq_info->irq_pciioinfo;
 216         if (pcidev_info) {
 217                 pcibus_info =
 218                     (struct pcibus_info *)pcidev_info->pdi_host_pcidev_info->
 219                     pdi_pcibus_info;
 220                 pcireg_force_intr_set(pcibus_info, bit);
 221         }
 222 }
 223
 224 void pcibr_target_interrupt(struct sn_irq_info *sn_irq_info)
 225 {
 226         struct pcidev_info *pcidev_info;
 227         struct pcibus_info *pcibus_info;
 228         int bit = sn_irq_info->irq_int_bit;
 229         u64 xtalk_addr = sn_irq_info->irq_xtalkaddr;
 230
 231         pcidev_info = (struct pcidev_info *)sn_irq_info->irq_pciioinfo;
 232         if (pcidev_info) {
 233                 pcibus_info =
 234                     (struct pcibus_info *)pcidev_info->pdi_host_pcidev_info->
 235                     pdi_pcibus_info;
 236
 237                 /* Disable the device's IRQ   */
 238                 pcireg_intr_enable_bit_clr(pcibus_info, (1 << bit));
 239
 240                 /* Change the device's IRQ    */
 241                 pcireg_intr_addr_addr_set(pcibus_info, bit, xtalk_addr);
 242
 243                 /* Re-enable the device's IRQ */
 244                 pcireg_intr_enable_bit_set(pcibus_info, (1 << bit));
 245
 246                 pcibr_force_interrupt(sn_irq_info);
 247         }
 248 }
 249
 250 /*
 251  * Provider entries for PIC/CP
 252  */
 253
 254 struct sn_pcibus_provider pcibr_provider = {
 255         .dma_map = pcibr_dma_map,
 256         .dma_map_consistent = pcibr_dma_map_consistent,
 257         .dma_unmap = pcibr_dma_unmap,
 258         .bus_fixup = pcibr_bus_fixup,
 259         .force_interrupt = pcibr_force_interrupt,
 260         .target_interrupt = pcibr_target_interrupt
 261 };
 262
 263 int
 264 pcibr_init_provider(void)
 265 {
 266         sn_pci_provider[PCIIO_ASIC_TYPE_PIC] = &pcibr_provider;
 267         sn_pci_provider[PCIIO_ASIC_TYPE_TIOCP] = &pcibr_provider;
 268
 269         return 0;
 270 }
 271
 272 EXPORT_SYMBOL_GPL(sal_pcibr_slot_enable);
 273 EXPORT_SYMBOL_GPL(sal_pcibr_slot_disable);
 274 EXPORT_SYMBOL_GPL(sn_ioboard_to_pci_bus);