arch/ia64/sn/kernel/io_init.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) 1992 - 1997, 2000-2004 Silicon Graphics, Inc. All rights reserved.
   7  */
   8
   9 #include <linux/bootmem.h>
  10 #include <asm/sn/types.h>
  11 #include <asm/sn/sn_sal.h>
  12 #include <asm/sn/addrs.h>
  13 #include "pci/pcibus_provider_defs.h"
  14 #include "pci/pcidev.h"
  15 #include "pci/pcibr_provider.h"
  16 #include "xtalk/xwidgetdev.h"
  17 #include <asm/sn/geo.h>
  18 #include "xtalk/hubdev.h"
  19 #include <asm/sn/io.h>
  20 #include <asm/sn/simulator.h>
  21
  22 char master_baseio_wid;
  23 nasid_t master_nasid = INVALID_NASID;   /* Partition Master */
  24
  25 struct slab_info {
  26         struct hubdev_info hubdev;
  27 };
  28
  29 struct brick {
  30         moduleid_t id;          /* Module ID of this module        */
  31         struct slab_info slab_info[MAX_SLABS + 1];
  32 };
  33
  34 int sn_ioif_inited = 0;         /* SN I/O infrastructure initialized? */
  35
  36 /*
  37  * Retrieve the DMA Flush List given nasid.  This list is needed
  38  * to implement the WAR - Flush DMA data on PIO Reads.
  39  */
  40 static inline uint64_t
  41 sal_get_widget_dmaflush_list(u64 nasid, u64 widget_num, u64 address)
  42 {
  43
  44         struct ia64_sal_retval ret_stuff;
  45         ret_stuff.status = 0;
  46         ret_stuff.v0 = 0;
  47
  48         SAL_CALL_NOLOCK(ret_stuff,
  49                         (u64) SN_SAL_IOIF_GET_WIDGET_DMAFLUSH_LIST,
  50                         (u64) nasid, (u64) widget_num, (u64) address, 0, 0, 0,
  51                         0);
  52         return ret_stuff.v0;
  53
  54 }
  55
  56 /*
  57  * Retrieve the hub device info structure for the given nasid.
  58  */
  59 static inline uint64_t sal_get_hubdev_info(u64 handle, u64 address)
  60 {
  61
  62         struct ia64_sal_retval ret_stuff;
  63         ret_stuff.status = 0;
  64         ret_stuff.v0 = 0;
  65
  66         SAL_CALL_NOLOCK(ret_stuff,
  67                         (u64) SN_SAL_IOIF_GET_HUBDEV_INFO,
  68                         (u64) handle, (u64) address, 0, 0, 0, 0, 0);
  69         return ret_stuff.v0;
  70 }
  71
  72 /*
  73  * Retrieve the pci bus information given the bus number.
  74  */
  75 static inline uint64_t sal_get_pcibus_info(u64 segment, u64 busnum, u64 address)
  76 {
  77
  78         struct ia64_sal_retval ret_stuff;
  79         ret_stuff.status = 0;
  80         ret_stuff.v0 = 0;
  81
  82         SAL_CALL_NOLOCK(ret_stuff,
  83                         (u64) SN_SAL_IOIF_GET_PCIBUS_INFO,
  84                         (u64) segment, (u64) busnum, (u64) address, 0, 0, 0, 0);
  85         return ret_stuff.v0;
  86 }
  87
  88 /*
  89  * Retrieve the pci device information given the bus and device|function number.
  90  */
  91 static inline uint64_t
  92 sal_get_pcidev_info(u64 segment, u64 bus_number, u64 devfn, u64 pci_dev,
  93                         u64 sn_irq_info)
  94 {
  95         struct ia64_sal_retval ret_stuff;
  96         ret_stuff.status = 0;
  97         ret_stuff.v0 = 0;
  98
  99         SAL_CALL_NOLOCK(ret_stuff,
 100                         (u64) SN_SAL_IOIF_GET_PCIDEV_INFO,
 101                         (u64) segment, (u64) bus_number, (u64) devfn,
 102                         (u64) pci_dev,
 103                         sn_irq_info, 0, 0);
 104         return ret_stuff.v0;
 105 }
 106
 107 /*
 108  * sn_alloc_pci_sysdata() - This routine allocates a pci controller
 109  *      which is expected as the pci_dev and pci_bus sysdata by the Linux
 110  *      PCI infrastructure.
 111  */
 112 static inline struct pci_controller *sn_alloc_pci_sysdata(void)
 113 {
 114         struct pci_controller *pci_sysdata;
 115
 116         pci_sysdata = kmalloc(sizeof(*pci_sysdata), GFP_KERNEL);
 117         if (!pci_sysdata)
 118                 BUG();
 119
 120         memset(pci_sysdata, 0, sizeof(*pci_sysdata));
 121         return pci_sysdata;
 122 }
 123
 124 /*
 125  * sn_fixup_ionodes() - This routine initializes the HUB data strcuture for
 126  *      each node in the system.
 127  */
 128 static void sn_fixup_ionodes(void)
 129 {
 130
 131         struct sn_flush_device_list *sn_flush_device_list;
 132         struct hubdev_info *hubdev;
 133         uint64_t status;
 134         uint64_t nasid;
 135         int i, widget;
 136
 137         for (i = 0; i < numionodes; i++) {
 138                 hubdev = (struct hubdev_info *)(NODEPDA(i)->pdinfo);
 139                 nasid = cnodeid_to_nasid(i);
 140                 status = sal_get_hubdev_info(nasid, (uint64_t) __pa(hubdev));
 141                 if (status)
 142                         continue;
 143
 144                 for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++)
 145                         hubdev->hdi_xwidget_info[widget].xwi_hubinfo = hubdev;
 146
 147                 if (!hubdev->hdi_flush_nasid_list.widget_p)
 148                         continue;
 149
 150                 hubdev->hdi_flush_nasid_list.widget_p =
 151                     kmalloc((HUB_WIDGET_ID_MAX + 1) *
 152                             sizeof(struct sn_flush_device_list *), GFP_KERNEL);
 153
 154                 memset(hubdev->hdi_flush_nasid_list.widget_p, 0x0,
 155                        (HUB_WIDGET_ID_MAX + 1) *
 156                        sizeof(struct sn_flush_device_list *));
 157
 158                 for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++) {
 159                         sn_flush_device_list = kmalloc(DEV_PER_WIDGET *
 160                                                        sizeof(struct
 161                                                               sn_flush_device_list),
 162                                                        GFP_KERNEL);
 163                         memset(sn_flush_device_list, 0x0,
 164                                DEV_PER_WIDGET *
 165                                sizeof(struct sn_flush_device_list));
 166
 167                         status =
 168                             sal_get_widget_dmaflush_list(nasid, widget,
 169                                                          (uint64_t)
 170                                                          __pa
 171                                                          (sn_flush_device_list));
 172                         if (status) {
 173                                 kfree(sn_flush_device_list);
 174                                 continue;
 175                         }
 176
 177                         hubdev->hdi_flush_nasid_list.widget_p[widget] =
 178                             sn_flush_device_list;
 179                 }
 180
 181                 if (!(i & 1))
 182                         hub_error_init(hubdev);
 183                 else
 184                         ice_error_init(hubdev);
 185         }
 186
 187 }
 188
 189 /*
 190  * sn_pci_fixup_slot() - This routine sets up a slot's resources
 191  * consistent with the Linux PCI abstraction layer.  Resources acquired
 192  * from our PCI provider include PIO maps to BAR space and interrupt
 193  * objects.
 194  */
 195 static void sn_pci_fixup_slot(struct pci_dev *dev)
 196 {
 197         int idx;
 198         int segment = 0;
 199         uint64_t size;
 200         struct sn_irq_info *sn_irq_info;
 201         struct pci_dev *host_pci_dev;
 202         int status = 0;
 203
 204         SN_PCIDEV_INFO(dev) = kmalloc(sizeof(struct pcidev_info), GFP_KERNEL);
 205         if (SN_PCIDEV_INFO(dev) <= 0)
 206                 BUG();          /* Cannot afford to run out of memory */
 207         memset(SN_PCIDEV_INFO(dev), 0, sizeof(struct pcidev_info));
 208
 209         sn_irq_info = kmalloc(sizeof(struct sn_irq_info), GFP_KERNEL);
 210         if (sn_irq_info <= 0)
 211                 BUG();          /* Cannot afford to run out of memory */
 212         memset(sn_irq_info, 0, sizeof(struct sn_irq_info));
 213
 214         /* Call to retrieve pci device information needed by kernel. */
 215         status = sal_get_pcidev_info((u64) segment, (u64) dev->bus->number,
 216                                      dev->devfn,
 217                                      (u64) __pa(SN_PCIDEV_INFO(dev)),
 218                                      (u64) __pa(sn_irq_info));
 219         if (status)
 220                 BUG();          /* Cannot get platform pci device information information */
 221
 222         /* Copy over PIO Mapped Addresses */
 223         for (idx = 0; idx <= PCI_ROM_RESOURCE; idx++) {
 224                 unsigned long start, end, addr;
 225
 226                 if (!SN_PCIDEV_INFO(dev)->pdi_pio_mapped_addr[idx])
 227                         continue;
 228
 229                 start = dev->resource[idx].start;
 230                 end = dev->resource[idx].end;
 231                 size = end - start;
 232                 addr = SN_PCIDEV_INFO(dev)->pdi_pio_mapped_addr[idx];
 233                 addr = ((addr << 4) >> 4) | __IA64_UNCACHED_OFFSET;
 234                 dev->resource[idx].start = addr;
 235                 dev->resource[idx].end = addr + size;
 236                 if (dev->resource[idx].flags & IORESOURCE_IO)
 237                         dev->resource[idx].parent = &ioport_resource;
 238                 else
 239                         dev->resource[idx].parent = &iomem_resource;
 240         }
 241
 242         /* set up host bus linkages */
 243         host_pci_dev =
 244             pci_find_slot(SN_PCIDEV_INFO(dev)->pdi_slot_host_handle >> 32,
 245                           SN_PCIDEV_INFO(dev)->
 246                           pdi_slot_host_handle & 0xffffffff);
 247         SN_PCIDEV_INFO(dev)->pdi_host_pcidev_info =
 248             SN_PCIDEV_INFO(host_pci_dev);
 249         SN_PCIDEV_INFO(dev)->pdi_linux_pcidev = dev;
 250         SN_PCIDEV_INFO(dev)->pdi_pcibus_info = SN_PCIBUS_BUSSOFT(dev->bus);
 251
 252         /* Only set up IRQ stuff if this device has a host bus context */
 253         if (SN_PCIDEV_BUSSOFT(dev) && sn_irq_info->irq_irq) {
 254                 SN_PCIDEV_INFO(dev)->pdi_sn_irq_info = sn_irq_info;
 255                 dev->irq = SN_PCIDEV_INFO(dev)->pdi_sn_irq_info->irq_irq;
 256                 sn_irq_fixup(dev, sn_irq_info);
 257         }
 258 }
 259
 260 /*
 261  * sn_pci_controller_fixup() - This routine sets up a bus's resources
 262  * consistent with the Linux PCI abstraction layer.
 263  */
 264 static void sn_pci_controller_fixup(int segment, int busnum)
 265 {
 266         int status = 0;
 267         int nasid, cnode;
 268         struct pci_bus *bus;
 269         struct pci_controller *controller;
 270         struct pcibus_bussoft *prom_bussoft_ptr;
 271         struct hubdev_info *hubdev_info;
 272         void *provider_soft;
 273
 274         status =
 275             sal_get_pcibus_info((u64) segment, (u64) busnum,
 276                                 (u64) ia64_tpa(&prom_bussoft_ptr));
 277         if (status > 0) {
 278                 return;         /* bus # does not exist */
 279         }
 280
 281         prom_bussoft_ptr = __va(prom_bussoft_ptr);
 282         controller = sn_alloc_pci_sysdata();
 283         /* controller non-zero is BUG'd in sn_alloc_pci_sysdata */
 284
 285         bus = pci_scan_bus(busnum, &pci_root_ops, controller);
 286         if (bus == NULL) {
 287                 return;         /* error, or bus already scanned */
 288         }
 289
 290         /*
 291          * Per-provider fixup.  Copies the contents from prom to local
 292          * area and links SN_PCIBUS_BUSSOFT().
 293          *
 294          * Note:  Provider is responsible for ensuring that prom_bussoft_ptr
 295          * represents an asic-type that it can handle.
 296          */
 297
 298         if (prom_bussoft_ptr->bs_asic_type == PCIIO_ASIC_TYPE_PPB) {
 299                 return;         /* no further fixup necessary */
 300         }
 301
 302         provider_soft = pcibr_bus_fixup(prom_bussoft_ptr);
 303         if (provider_soft == NULL) {
 304                 return;         /* fixup failed or not applicable */
 305         }
 306
 307         /*
 308          * Generic bus fixup goes here.  Don't reference prom_bussoft_ptr
 309          * after this point.
 310          */
 311
 312         PCI_CONTROLLER(bus) = controller;
 313         SN_PCIBUS_BUSSOFT(bus) = provider_soft;
 314
 315         nasid = NASID_GET(SN_PCIBUS_BUSSOFT(bus)->bs_base);
 316         cnode = nasid_to_cnodeid(nasid);
 317         hubdev_info = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
 318         SN_PCIBUS_BUSSOFT(bus)->bs_xwidget_info =
 319             &(hubdev_info->hdi_xwidget_info[SN_PCIBUS_BUSSOFT(bus)->bs_xid]);
 320 }
 321
 322 /*
 323  * Ugly hack to get PCI setup until we have a proper ACPI namespace.
 324  */
 325
 326 #define PCI_BUSES_TO_SCAN 256
 327
 328 static int __init sn_pci_init(void)
 329 {
 330         int i = 0;
 331         struct pci_dev *pci_dev = NULL;
 332         extern void sn_init_cpei_timer(void);
 333 #ifdef CONFIG_PROC_FS
 334         extern void register_sn_procfs(void);
 335 #endif
 336
 337         if (!ia64_platform_is("sn2") || IS_RUNNING_ON_SIMULATOR())
 338                 return 0;
 339
 340         /*
 341          * This is needed to avoid bounce limit checks in the blk layer
 342          */
 343         ia64_max_iommu_merge_mask = ~PAGE_MASK;
 344         sn_fixup_ionodes();
 345         sn_irq = kmalloc(sizeof(struct sn_irq_info *) * NR_IRQS, GFP_KERNEL);
 346         if (sn_irq <= 0)
 347                 BUG();          /* Canno afford to run out of memory. */
 348         memset(sn_irq, 0, sizeof(struct sn_irq_info *) * NR_IRQS);
 349
 350         sn_init_cpei_timer();
 351
 352 #ifdef CONFIG_PROC_FS
 353         register_sn_procfs();
 354 #endif
 355
 356         for (i = 0; i < PCI_BUSES_TO_SCAN; i++) {
 357                 sn_pci_controller_fixup(0, i);
 358         }
 359
 360         /*
 361          * Generic Linux PCI Layer has created the pci_bus and pci_dev
 362          * structures - time for us to add our SN PLatform specific
 363          * information.
 364          */
 365
 366         while ((pci_dev =
 367                 pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pci_dev)) != NULL) {
 368                 sn_pci_fixup_slot(pci_dev);
 369         }
 370
 371         sn_ioif_inited = 1;     /* sn I/O infrastructure now initialized */
 372
 373         return 0;
 374 }
 375
 376 /*
 377  * hubdev_init_node() - Creates the HUB data structure and link them to it's
 378  *      own NODE specific data area.
 379  */
 380 void hubdev_init_node(nodepda_t * npda, cnodeid_t node)
 381 {
 382
 383         struct hubdev_info *hubdev_info;
 384
 385         if (node >= numnodes)   /* Headless/memless IO nodes */
 386                 hubdev_info =
 387                     (struct hubdev_info *)alloc_bootmem_node(NODE_DATA(0),
 388                                                              sizeof(struct
 389                                                                     hubdev_info));
 390         else
 391                 hubdev_info =
 392                     (struct hubdev_info *)alloc_bootmem_node(NODE_DATA(node),
 393                                                              sizeof(struct
 394                                                                     hubdev_info));
 395         npda->pdinfo = (void *)hubdev_info;
 396
 397 }
 398
 399 geoid_t
 400 cnodeid_get_geoid(cnodeid_t cnode)
 401 {
 402
 403         struct hubdev_info *hubdev;
 404
 405         hubdev = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
 406         return hubdev->hdi_geoid;
 407
 408 }
 409
 410 subsys_initcall(sn_pci_init);