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, 2006 Silicon Graphics, Inc. All rights reserved.
   7  */
   8
   9 #include <linux/interrupt.h>
  10 #include <linux/types.h>
  11 #include <linux/slab.h>
  12 #include <linux/pci.h>
  13 #include <linux/export.h>
  14 #include <asm/sn/addrs.h>
  15 #include <asm/sn/geo.h>
  16 #include <asm/sn/pcibr_provider.h>
  17 #include <asm/sn/pcibus_provider_defs.h>
  18 #include <asm/sn/pcidev.h>
  19 #include <asm/sn/sn_sal.h>
  20 #include <asm/sn/pic.h>
  21 #include <asm/sn/sn2/sn_hwperf.h>
  22 #include "xtalk/xwidgetdev.h"
  23 #include "xtalk/hubdev.h"
  24
  25 int
  26 sal_pcibr_slot_enable(struct pcibus_info *soft, int device, void *resp,
  27                       char **ssdt)
  28 {
  29         struct ia64_sal_retval ret_stuff;
  30         u64 busnum;
  31         u64 segment;
  32
  33         ret_stuff.status = 0;
  34         ret_stuff.v0 = 0;
  35
  36         segment = soft->pbi_buscommon.bs_persist_segment;
  37         busnum = soft->pbi_buscommon.bs_persist_busnum;
  38         SAL_CALL_NOLOCK(ret_stuff, (u64) SN_SAL_IOIF_SLOT_ENABLE, segment,
  39                         busnum, (u64) device, (u64) resp, (u64)ia64_tpa(ssdt),
  40                         0, 0);
  41
  42         return (int)ret_stuff.v0;
  43 }
  44
  45 int
  46 sal_pcibr_slot_disable(struct pcibus_info *soft, int device, int action,
  47                        void *resp)
  48 {
  49         struct ia64_sal_retval ret_stuff;
  50         u64 busnum;
  51         u64 segment;
  52
  53         ret_stuff.status = 0;
  54         ret_stuff.v0 = 0;
  55
  56         segment = soft->pbi_buscommon.bs_persist_segment;
  57         busnum = soft->pbi_buscommon.bs_persist_busnum;
  58         SAL_CALL_NOLOCK(ret_stuff, (u64) SN_SAL_IOIF_SLOT_DISABLE,
  59                         segment, busnum, (u64) device, (u64) action,
  60                         (u64) resp, 0, 0);
  61
  62         return (int)ret_stuff.v0;
  63 }
  64
  65 static int sal_pcibr_error_interrupt(struct pcibus_info *soft)
  66 {
  67         struct ia64_sal_retval ret_stuff;
  68         u64 busnum;
  69         int segment;
  70         ret_stuff.status = 0;
  71         ret_stuff.v0 = 0;
  72
  73         segment = soft->pbi_buscommon.bs_persist_segment;
  74         busnum = soft->pbi_buscommon.bs_persist_busnum;
  75         SAL_CALL_NOLOCK(ret_stuff,
  76                         (u64) SN_SAL_IOIF_ERROR_INTERRUPT,
  77                         (u64) segment, (u64) busnum, 0, 0, 0, 0, 0);
  78
  79         return (int)ret_stuff.v0;
  80 }
  81
  82 u16 sn_ioboard_to_pci_bus(struct pci_bus *pci_bus)
  83 {
  84         long rc;
  85         u16 uninitialized_var(ioboard);         /* GCC be quiet */
  86         nasid_t nasid = NASID_GET(SN_PCIBUS_BUSSOFT(pci_bus)->bs_base);
  87
  88         rc = ia64_sn_sysctl_ioboard_get(nasid, &ioboard);
  89         if (rc) {
  90                 printk(KERN_WARNING "ia64_sn_sysctl_ioboard_get failed: %ld\n",
  91                        rc);
  92                 return 0;
  93         }
  94
  95         return ioboard;
  96 }
  97
  98 /*
  99  * PCI Bridge Error interrupt handler.  Gets invoked whenever a PCI
 100  * bridge sends an error interrupt.
 101  */
 102 static irqreturn_t
 103 pcibr_error_intr_handler(int irq, void *arg)
 104 {
 105         struct pcibus_info *soft = arg;
 106
 107         if (sal_pcibr_error_interrupt(soft) < 0)
 108                 panic("pcibr_error_intr_handler(): Fatal Bridge Error");
 109
 110         return IRQ_HANDLED;
 111 }
 112
 113 void *
 114 pcibr_bus_fixup(struct pcibus_bussoft *prom_bussoft, struct pci_controller *controller)
 115 {
 116         int nasid, cnode, j;
 117         struct hubdev_info *hubdev_info;
 118         struct pcibus_info *soft;
 119         struct sn_flush_device_kernel *sn_flush_device_kernel;
 120         struct sn_flush_device_common *common;
 121
 122         if (! IS_PCI_BRIDGE_ASIC(prom_bussoft->bs_asic_type)) {
 123                 return NULL;
 124         }
 125
 126         /*
 127          * Allocate kernel bus soft and copy from prom.
 128          */
 129
 130         soft = kmemdup(prom_bussoft, sizeof(struct pcibus_info), GFP_KERNEL);
 131         if (!soft) {
 132                 return NULL;
 133         }
 134
 135         soft->pbi_buscommon.bs_base = (unsigned long)
 136                 ioremap(REGION_OFFSET(soft->pbi_buscommon.bs_base),
 137                         sizeof(struct pic));
 138
 139         spin_lock_init(&soft->pbi_lock);
 140
 141         /*
 142          * register the bridge's error interrupt handler
 143          */
 144         if (request_irq(SGI_PCIASIC_ERROR, pcibr_error_intr_handler,
 145                         IRQF_SHARED, "PCIBR error", (void *)(soft))) {
 146                 printk(KERN_WARNING
 147                        "pcibr cannot allocate interrupt for error handler\n");
 148         }
 149         irq_set_handler(SGI_PCIASIC_ERROR, handle_level_irq);
 150         sn_set_err_irq_affinity(SGI_PCIASIC_ERROR);
 151
 152         /*
 153          * Update the Bridge with the "kernel" pagesize
 154          */
 155         if (PAGE_SIZE < 16384) {
 156                 pcireg_control_bit_clr(soft, PCIBR_CTRL_PAGE_SIZE);
 157         } else {
 158                 pcireg_control_bit_set(soft, PCIBR_CTRL_PAGE_SIZE);
 159         }
 160
 161         nasid = NASID_GET(soft->pbi_buscommon.bs_base);
 162         cnode = nasid_to_cnodeid(nasid);
 163         hubdev_info = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
 164
 165         if (hubdev_info->hdi_flush_nasid_list.widget_p) {
 166                 sn_flush_device_kernel = hubdev_info->hdi_flush_nasid_list.
 167                     widget_p[(int)soft->pbi_buscommon.bs_xid];
 168                 if (sn_flush_device_kernel) {
 169                         for (j = 0; j < DEV_PER_WIDGET;
 170                              j++, sn_flush_device_kernel++) {
 171                                 common = sn_flush_device_kernel->common;
 172                                 if (common->sfdl_slot == -1)
 173                                         continue;
 174                                 if ((common->sfdl_persistent_segment ==
 175                                      soft->pbi_buscommon.bs_persist_segment) &&
 176                                      (common->sfdl_persistent_busnum ==
 177                                      soft->pbi_buscommon.bs_persist_busnum))
 178                                         common->sfdl_pcibus_info =
 179                                             soft;
 180                         }
 181                 }
 182         }
 183
 184         /* Setup the PMU ATE map */
 185         soft->pbi_int_ate_resource.lowest_free_index = 0;
 186         soft->pbi_int_ate_resource.ate =
 187             kzalloc(soft->pbi_int_ate_size * sizeof(u64), GFP_KERNEL);
 188
 189         if (!soft->pbi_int_ate_resource.ate) {
 190                 kfree(soft);
 191                 return NULL;
 192         }
 193
 194         return soft;
 195 }
 196
 197 void pcibr_force_interrupt(struct sn_irq_info *sn_irq_info)
 198 {
 199         struct pcidev_info *pcidev_info;
 200         struct pcibus_info *pcibus_info;
 201         int bit = sn_irq_info->irq_int_bit;
 202
 203         if (! sn_irq_info->irq_bridge)
 204                 return;
 205
 206         pcidev_info = (struct pcidev_info *)sn_irq_info->irq_pciioinfo;
 207         if (pcidev_info) {
 208                 pcibus_info =
 209                     (struct pcibus_info *)pcidev_info->pdi_host_pcidev_info->
 210                     pdi_pcibus_info;
 211                 pcireg_force_intr_set(pcibus_info, bit);
 212         }
 213 }
 214
 215 void pcibr_target_interrupt(struct sn_irq_info *sn_irq_info)
 216 {
 217         struct pcidev_info *pcidev_info;
 218         struct pcibus_info *pcibus_info;
 219         int bit = sn_irq_info->irq_int_bit;
 220         u64 xtalk_addr = sn_irq_info->irq_xtalkaddr;
 221
 222         pcidev_info = (struct pcidev_info *)sn_irq_info->irq_pciioinfo;
 223         if (pcidev_info) {
 224                 pcibus_info =
 225                     (struct pcibus_info *)pcidev_info->pdi_host_pcidev_info->
 226                     pdi_pcibus_info;
 227
 228                 /* Disable the device's IRQ   */
 229                 pcireg_intr_enable_bit_clr(pcibus_info, (1 << bit));
 230
 231                 /* Change the device's IRQ    */
 232                 pcireg_intr_addr_addr_set(pcibus_info, bit, xtalk_addr);
 233
 234                 /* Re-enable the device's IRQ */
 235                 pcireg_intr_enable_bit_set(pcibus_info, (1 << bit));
 236
 237                 pcibr_force_interrupt(sn_irq_info);
 238         }
 239 }
 240
 241 /*
 242  * Provider entries for PIC/CP
 243  */
 244
 245 struct sn_pcibus_provider pcibr_provider = {
 246         .dma_map = pcibr_dma_map,
 247         .dma_map_consistent = pcibr_dma_map_consistent,
 248         .dma_unmap = pcibr_dma_unmap,
 249         .bus_fixup = pcibr_bus_fixup,
 250         .force_interrupt = pcibr_force_interrupt,
 251         .target_interrupt = pcibr_target_interrupt
 252 };
 253
 254 int
 255 pcibr_init_provider(void)
 256 {
 257         sn_pci_provider[PCIIO_ASIC_TYPE_PIC] = &pcibr_provider;
 258         sn_pci_provider[PCIIO_ASIC_TYPE_TIOCP] = &pcibr_provider;
 259
 260         return 0;
 261 }
 262
 263 EXPORT_SYMBOL_GPL(sal_pcibr_slot_enable);
 264 EXPORT_SYMBOL_GPL(sal_pcibr_slot_disable);
 265 EXPORT_SYMBOL_GPL(sn_ioboard_to_pci_bus);