release/src-rt-6.x/linux/linux-2.6/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/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/pic.h>
  19 #include <asm/sn/sn2/sn_hwperf.h>
  20 #include "xtalk/xwidgetdev.h"
  21 #include "xtalk/hubdev.h"
  22
  23 int
  24 sal_pcibr_slot_enable(struct pcibus_info *soft, int device, void *resp,
  25                       char **ssdt)
  26 {
  27         struct ia64_sal_retval ret_stuff;
  28         u64 busnum;
  29         u64 segment;
  30
  31         ret_stuff.status = 0;
  32         ret_stuff.v0 = 0;
  33
  34         segment = soft->pbi_buscommon.bs_persist_segment;
  35         busnum = soft->pbi_buscommon.bs_persist_busnum;
  36         SAL_CALL_NOLOCK(ret_stuff, (u64) SN_SAL_IOIF_SLOT_ENABLE, segment,
  37                         busnum, (u64) device, (u64) resp, (u64)ia64_tpa(ssdt),
  38                         0, 0);
  39
  40         return (int)ret_stuff.v0;
  41 }
  42
  43 int
  44 sal_pcibr_slot_disable(struct pcibus_info *soft, int device, int action,
  45                        void *resp)
  46 {
  47         struct ia64_sal_retval ret_stuff;
  48         u64 busnum;
  49         u64 segment;
  50
  51         ret_stuff.status = 0;
  52         ret_stuff.v0 = 0;
  53
  54         segment = soft->pbi_buscommon.bs_persist_segment;
  55         busnum = soft->pbi_buscommon.bs_persist_busnum;
  56         SAL_CALL_NOLOCK(ret_stuff, (u64) SN_SAL_IOIF_SLOT_DISABLE,
  57                         segment, busnum, (u64) device, (u64) action,
  58                         (u64) resp, 0, 0);
  59
  60         return (int)ret_stuff.v0;
  61 }
  62
  63 static int sal_pcibr_error_interrupt(struct pcibus_info *soft)
  64 {
  65         struct ia64_sal_retval ret_stuff;
  66         u64 busnum;
  67         int segment;
  68         ret_stuff.status = 0;
  69         ret_stuff.v0 = 0;
  70
  71         segment = soft->pbi_buscommon.bs_persist_segment;
  72         busnum = soft->pbi_buscommon.bs_persist_busnum;
  73         SAL_CALL_NOLOCK(ret_stuff,
  74                         (u64) SN_SAL_IOIF_ERROR_INTERRUPT,
  75                         (u64) segment, (u64) busnum, 0, 0, 0, 0, 0);
  76
  77         return (int)ret_stuff.v0;
  78 }
  79
  80 u16 sn_ioboard_to_pci_bus(struct pci_bus *pci_bus)
  81 {
  82         s64 rc;
  83         u16 ioboard;
  84         nasid_t nasid = NASID_GET(SN_PCIBUS_BUSSOFT(pci_bus)->bs_base);
  85
  86         rc = ia64_sn_sysctl_ioboard_get(nasid, &ioboard);
  87         if (rc) {
  88                 printk(KERN_WARNING "ia64_sn_sysctl_ioboard_get failed: %ld\n",
  89                        rc);
  90                 return 0;
  91         }
  92
  93         return ioboard;
  94 }
  95
  96 /*
  97  * PCI Bridge Error interrupt handler.  Gets invoked whenever a PCI
  98  * bridge sends an error interrupt.
  99  */
 100 static irqreturn_t
 101 pcibr_error_intr_handler(int irq, void *arg)
 102 {
 103         struct pcibus_info *soft = (struct pcibus_info *)arg;
 104
 105         if (sal_pcibr_error_interrupt(soft) < 0) {
 106                 panic("pcibr_error_intr_handler(): Fatal Bridge Error");
 107         }
 108         return IRQ_HANDLED;
 109 }
 110
 111 void *
 112 pcibr_bus_fixup(struct pcibus_bussoft *prom_bussoft, struct pci_controller *controller)
 113 {
 114         int nasid, cnode, j;
 115         struct hubdev_info *hubdev_info;
 116         struct pcibus_info *soft;
 117         struct sn_flush_device_kernel *sn_flush_device_kernel;
 118         struct sn_flush_device_common *common;
 119
 120         if (! IS_PCI_BRIDGE_ASIC(prom_bussoft->bs_asic_type)) {
 121                 return NULL;
 122         }
 123
 124         /*
 125          * Allocate kernel bus soft and copy from prom.
 126          */
 127
 128         soft = kmalloc(sizeof(struct pcibus_info), GFP_KERNEL);
 129         if (!soft) {
 130                 return NULL;
 131         }
 132
 133         memcpy(soft, prom_bussoft, sizeof(struct pcibus_info));
 134         soft->pbi_buscommon.bs_base = (unsigned long)
 135                 ioremap(REGION_OFFSET(soft->pbi_buscommon.bs_base),
 136                         sizeof(struct pic));
 137
 138         spin_lock_init(&soft->pbi_lock);
 139
 140         /*
 141          * register the bridge's error interrupt handler
 142          */
 143         if (request_irq(SGI_PCIASIC_ERROR, pcibr_error_intr_handler,
 144                         IRQF_SHARED, "PCIBR error", (void *)(soft))) {
 145                 printk(KERN_WARNING
 146                        "pcibr cannot allocate interrupt for error handler\n");
 147         }
 148
 149         /*
 150          * Update the Bridge with the "kernel" pagesize
 151          */
 152         if (PAGE_SIZE < 16384) {
 153                 pcireg_control_bit_clr(soft, PCIBR_CTRL_PAGE_SIZE);
 154         } else {
 155                 pcireg_control_bit_set(soft, PCIBR_CTRL_PAGE_SIZE);
 156         }
 157
 158         nasid = NASID_GET(soft->pbi_buscommon.bs_base);
 159         cnode = nasid_to_cnodeid(nasid);
 160         hubdev_info = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
 161
 162         if (hubdev_info->hdi_flush_nasid_list.widget_p) {
 163                 sn_flush_device_kernel = hubdev_info->hdi_flush_nasid_list.
 164                     widget_p[(int)soft->pbi_buscommon.bs_xid];
 165                 if (sn_flush_device_kernel) {
 166                         for (j = 0; j < DEV_PER_WIDGET;
 167                              j++, sn_flush_device_kernel++) {
 168                                 common = sn_flush_device_kernel->common;
 169                                 if (common->sfdl_slot == -1)
 170                                         continue;
 171                                 if ((common->sfdl_persistent_segment ==
 172                                      soft->pbi_buscommon.bs_persist_segment) &&
 173                                      (common->sfdl_persistent_busnum ==
 174                                      soft->pbi_buscommon.bs_persist_busnum))
 175                                         common->sfdl_pcibus_info =
 176                                             soft;
 177                         }
 178                 }
 179         }
 180
 181         /* Setup the PMU ATE map */
 182         soft->pbi_int_ate_resource.lowest_free_index = 0;
 183         soft->pbi_int_ate_resource.ate =
 184             kzalloc(soft->pbi_int_ate_size * sizeof(u64), GFP_KERNEL);
 185
 186         if (!soft->pbi_int_ate_resource.ate) {
 187                 kfree(soft);
 188                 return NULL;
 189         }
 190
 191         return soft;
 192 }
 193
 194 void pcibr_force_interrupt(struct sn_irq_info *sn_irq_info)
 195 {
 196         struct pcidev_info *pcidev_info;
 197         struct pcibus_info *pcibus_info;
 198         int bit = sn_irq_info->irq_int_bit;
 199
 200         if (! sn_irq_info->irq_bridge)
 201                 return;
 202
 203         pcidev_info = (struct pcidev_info *)sn_irq_info->irq_pciioinfo;
 204         if (pcidev_info) {
 205                 pcibus_info =
 206                     (struct pcibus_info *)pcidev_info->pdi_host_pcidev_info->
 207                     pdi_pcibus_info;
 208                 pcireg_force_intr_set(pcibus_info, bit);
 209         }
 210 }
 211
 212 void pcibr_target_interrupt(struct sn_irq_info *sn_irq_info)
 213 {
 214         struct pcidev_info *pcidev_info;
 215         struct pcibus_info *pcibus_info;
 216         int bit = sn_irq_info->irq_int_bit;
 217         u64 xtalk_addr = sn_irq_info->irq_xtalkaddr;
 218
 219         pcidev_info = (struct pcidev_info *)sn_irq_info->irq_pciioinfo;
 220         if (pcidev_info) {
 221                 pcibus_info =
 222                     (struct pcibus_info *)pcidev_info->pdi_host_pcidev_info->
 223                     pdi_pcibus_info;
 224
 225                 /* Disable the device's IRQ   */
 226                 pcireg_intr_enable_bit_clr(pcibus_info, (1 << bit));
 227
 228                 /* Change the device's IRQ    */
 229                 pcireg_intr_addr_addr_set(pcibus_info, bit, xtalk_addr);
 230
 231                 /* Re-enable the device's IRQ */
 232                 pcireg_intr_enable_bit_set(pcibus_info, (1 << bit));
 233
 234                 pcibr_force_interrupt(sn_irq_info);
 235         }
 236 }
 237
 238 /*
 239  * Provider entries for PIC/CP
 240  */
 241
 242 struct sn_pcibus_provider pcibr_provider = {
 243         .dma_map = pcibr_dma_map,
 244         .dma_map_consistent = pcibr_dma_map_consistent,
 245         .dma_unmap = pcibr_dma_unmap,
 246         .bus_fixup = pcibr_bus_fixup,
 247         .force_interrupt = pcibr_force_interrupt,
 248         .target_interrupt = pcibr_target_interrupt
 249 };
 250
 251 int
 252 pcibr_init_provider(void)
 253 {
 254         sn_pci_provider[PCIIO_ASIC_TYPE_PIC] = &pcibr_provider;
 255         sn_pci_provider[PCIIO_ASIC_TYPE_TIOCP] = &pcibr_provider;
 256
 257         return 0;
 258 }
 259
 260 EXPORT_SYMBOL_GPL(sal_pcibr_slot_enable);
 261 EXPORT_SYMBOL_GPL(sal_pcibr_slot_disable);
 262 EXPORT_SYMBOL_GPL(sn_ioboard_to_pci_bus);