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   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 <linux/nodemask.h>
  11 #include <asm/sn/types.h>
  12 #include <asm/sn/sn_sal.h>
  13 #include <asm/sn/addrs.h>
  14 #include "pci/pcibus_provider_defs.h"
  15 #include "pci/pcidev.h"
  16 #include "pci/pcibr_provider.h"
  17 #include "xtalk/xwidgetdev.h"
  18 #include <asm/sn/geo.h>
  19 #include "xtalk/hubdev.h"
  20 #include <asm/sn/io.h>
  21 #include <asm/sn/simulator.h>
  22
  23 char master_baseio_wid;
  24 nasid_t master_nasid = INVALID_NASID;   /* Partition Master */
  25
  26 struct slab_info {
  27         struct hubdev_info hubdev;
  28 };
  29
  30 struct brick {
  31         moduleid_t id;          /* Module ID of this module        */
  32         struct slab_info slab_info[MAX_SLABS + 1];
  33 };
  34
  35 int sn_ioif_inited = 0;         /* SN I/O infrastructure initialized? */
  36
  37 struct sn_pcibus_provider *sn_pci_provider[PCIIO_ASIC_MAX_TYPES];       /* indexed by asic type */
  38
  39 /*
  40  * Hooks and struct for unsupported pci providers
  41  */
  42
  43 static dma_addr_t
  44 sn_default_pci_map(struct pci_dev *pdev, unsigned long paddr, size_t size)
  45 {
  46         return 0;
  47 }
  48
  49 static void
  50 sn_default_pci_unmap(struct pci_dev *pdev, dma_addr_t addr, int direction)
  51 {
  52         return;
  53 }
  54
  55 static void *
  56 sn_default_pci_bus_fixup(struct pcibus_bussoft *soft)
  57 {
  58         return NULL;
  59 }
  60
  61 static struct sn_pcibus_provider sn_pci_default_provider = {
  62         .dma_map = sn_default_pci_map,
  63         .dma_map_consistent = sn_default_pci_map,
  64         .dma_unmap = sn_default_pci_unmap,
  65         .bus_fixup = sn_default_pci_bus_fixup,
  66 };
  67
  68 /*
  69  * Retrieve the DMA Flush List given nasid.  This list is needed
  70  * to implement the WAR - Flush DMA data on PIO Reads.
  71  */
  72 static inline uint64_t
  73 sal_get_widget_dmaflush_list(u64 nasid, u64 widget_num, u64 address)
  74 {
  75
  76         struct ia64_sal_retval ret_stuff;
  77         ret_stuff.status = 0;
  78         ret_stuff.v0 = 0;
  79
  80         SAL_CALL_NOLOCK(ret_stuff,
  81                         (u64) SN_SAL_IOIF_GET_WIDGET_DMAFLUSH_LIST,
  82                         (u64) nasid, (u64) widget_num, (u64) address, 0, 0, 0,
  83                         0);
  84         return ret_stuff.v0;
  85
  86 }
  87
  88 /*
  89  * Retrieve the hub device info structure for the given nasid.
  90  */
  91 static inline uint64_t sal_get_hubdev_info(u64 handle, u64 address)
  92 {
  93
  94         struct ia64_sal_retval ret_stuff;
  95         ret_stuff.status = 0;
  96         ret_stuff.v0 = 0;
  97
  98         SAL_CALL_NOLOCK(ret_stuff,
  99                         (u64) SN_SAL_IOIF_GET_HUBDEV_INFO,
 100                         (u64) handle, (u64) address, 0, 0, 0, 0, 0);
 101         return ret_stuff.v0;
 102 }
 103
 104 /*
 105  * Retrieve the pci bus information given the bus number.
 106  */
 107 static inline uint64_t sal_get_pcibus_info(u64 segment, u64 busnum, u64 address)
 108 {
 109
 110         struct ia64_sal_retval ret_stuff;
 111         ret_stuff.status = 0;
 112         ret_stuff.v0 = 0;
 113
 114         SAL_CALL_NOLOCK(ret_stuff,
 115                         (u64) SN_SAL_IOIF_GET_PCIBUS_INFO,
 116                         (u64) segment, (u64) busnum, (u64) address, 0, 0, 0, 0);
 117         return ret_stuff.v0;
 118 }
 119
 120 /*
 121  * Retrieve the pci device information given the bus and device|function number.
 122  */
 123 static inline uint64_t
 124 sal_get_pcidev_info(u64 segment, u64 bus_number, u64 devfn, u64 pci_dev,
 125                         u64 sn_irq_info)
 126 {
 127         struct ia64_sal_retval ret_stuff;
 128         ret_stuff.status = 0;
 129         ret_stuff.v0 = 0;
 130
 131         SAL_CALL_NOLOCK(ret_stuff,
 132                         (u64) SN_SAL_IOIF_GET_PCIDEV_INFO,
 133                         (u64) segment, (u64) bus_number, (u64) devfn,
 134                         (u64) pci_dev,
 135                         sn_irq_info, 0, 0);
 136         return ret_stuff.v0;
 137 }
 138
 139 /*
 140  * sn_alloc_pci_sysdata() - This routine allocates a pci controller
 141  *      which is expected as the pci_dev and pci_bus sysdata by the Linux
 142  *      PCI infrastructure.
 143  */
 144 static inline struct pci_controller *sn_alloc_pci_sysdata(void)
 145 {
 146         struct pci_controller *pci_sysdata;
 147
 148         pci_sysdata = kmalloc(sizeof(*pci_sysdata), GFP_KERNEL);
 149         if (!pci_sysdata)
 150                 BUG();
 151
 152         memset(pci_sysdata, 0, sizeof(*pci_sysdata));
 153         return pci_sysdata;
 154 }
 155
 156 /*
 157  * sn_fixup_ionodes() - This routine initializes the HUB data strcuture for
 158  *      each node in the system.
 159  */
 160 static void sn_fixup_ionodes(void)
 161 {
 162
 163         struct sn_flush_device_list *sn_flush_device_list;
 164         struct hubdev_info *hubdev;
 165         uint64_t status;
 166         uint64_t nasid;
 167         int i, widget;
 168
 169         for (i = 0; i < numionodes; i++) {
 170                 hubdev = (struct hubdev_info *)(NODEPDA(i)->pdinfo);
 171                 nasid = cnodeid_to_nasid(i);
 172                 status = sal_get_hubdev_info(nasid, (uint64_t) __pa(hubdev));
 173                 if (status)
 174                         continue;
 175
 176                 for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++)
 177                         hubdev->hdi_xwidget_info[widget].xwi_hubinfo = hubdev;
 178
 179                 if (!hubdev->hdi_flush_nasid_list.widget_p)
 180                         continue;
 181
 182                 hubdev->hdi_flush_nasid_list.widget_p =
 183                     kmalloc((HUB_WIDGET_ID_MAX + 1) *
 184                             sizeof(struct sn_flush_device_list *), GFP_KERNEL);
 185
 186                 memset(hubdev->hdi_flush_nasid_list.widget_p, 0x0,
 187                        (HUB_WIDGET_ID_MAX + 1) *
 188                        sizeof(struct sn_flush_device_list *));
 189
 190                 for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++) {
 191                         sn_flush_device_list = kmalloc(DEV_PER_WIDGET *
 192                                                        sizeof(struct
 193                                                               sn_flush_device_list),
 194                                                        GFP_KERNEL);
 195                         memset(sn_flush_device_list, 0x0,
 196                                DEV_PER_WIDGET *
 197                                sizeof(struct sn_flush_device_list));
 198
 199                         status =
 200                             sal_get_widget_dmaflush_list(nasid, widget,
 201                                                          (uint64_t)
 202                                                          __pa
 203                                                          (sn_flush_device_list));
 204                         if (status) {
 205                                 kfree(sn_flush_device_list);
 206                                 continue;
 207                         }
 208
 209                         hubdev->hdi_flush_nasid_list.widget_p[widget] =
 210                             sn_flush_device_list;
 211                 }
 212
 213                 if (!(i & 1))
 214                         hub_error_init(hubdev);
 215                 else
 216                         ice_error_init(hubdev);
 217         }
 218
 219 }
 220
 221 /*
 222  * sn_pci_fixup_slot() - This routine sets up a slot's resources
 223  * consistent with the Linux PCI abstraction layer.  Resources acquired
 224  * from our PCI provider include PIO maps to BAR space and interrupt
 225  * objects.
 226  */
 227 static void sn_pci_fixup_slot(struct pci_dev *dev)
 228 {
 229         int idx;
 230         int segment = 0;
 231         uint64_t size;
 232         struct sn_irq_info *sn_irq_info;
 233         struct pci_dev *host_pci_dev;
 234         int status = 0;
 235         struct pcibus_bussoft *bs;
 236
 237         dev->sysdata = kmalloc(sizeof(struct pcidev_info), GFP_KERNEL);
 238         if (SN_PCIDEV_INFO(dev) <= 0)
 239                 BUG();          /* Cannot afford to run out of memory */
 240         memset(SN_PCIDEV_INFO(dev), 0, sizeof(struct pcidev_info));
 241
 242         sn_irq_info = kmalloc(sizeof(struct sn_irq_info), GFP_KERNEL);
 243         if (sn_irq_info <= 0)
 244                 BUG();          /* Cannot afford to run out of memory */
 245         memset(sn_irq_info, 0, sizeof(struct sn_irq_info));
 246
 247         /* Call to retrieve pci device information needed by kernel. */
 248         status = sal_get_pcidev_info((u64) segment, (u64) dev->bus->number,
 249                                      dev->devfn,
 250                                      (u64) __pa(SN_PCIDEV_INFO(dev)),
 251                                      (u64) __pa(sn_irq_info));
 252         if (status)
 253                 BUG();          /* Cannot get platform pci device information information */
 254
 255         /* Copy over PIO Mapped Addresses */
 256         for (idx = 0; idx <= PCI_ROM_RESOURCE; idx++) {
 257                 unsigned long start, end, addr;
 258
 259                 if (!SN_PCIDEV_INFO(dev)->pdi_pio_mapped_addr[idx])
 260                         continue;
 261
 262                 start = dev->resource[idx].start;
 263                 end = dev->resource[idx].end;
 264                 size = end - start;
 265                 addr = SN_PCIDEV_INFO(dev)->pdi_pio_mapped_addr[idx];
 266                 addr = ((addr << 4) >> 4) | __IA64_UNCACHED_OFFSET;
 267                 dev->resource[idx].start = addr;
 268                 dev->resource[idx].end = addr + size;
 269                 if (dev->resource[idx].flags & IORESOURCE_IO)
 270                         dev->resource[idx].parent = &ioport_resource;
 271                 else
 272                         dev->resource[idx].parent = &iomem_resource;
 273         }
 274
 275         /* set up host bus linkages */
 276         bs = SN_PCIBUS_BUSSOFT(dev->bus);
 277         host_pci_dev =
 278             pci_find_slot(SN_PCIDEV_INFO(dev)->pdi_slot_host_handle >> 32,
 279                           SN_PCIDEV_INFO(dev)->
 280                           pdi_slot_host_handle & 0xffffffff);
 281         SN_PCIDEV_INFO(dev)->pdi_host_pcidev_info =
 282             SN_PCIDEV_INFO(host_pci_dev);
 283         SN_PCIDEV_INFO(dev)->pdi_linux_pcidev = dev;
 284         SN_PCIDEV_INFO(dev)->pdi_pcibus_info = bs;
 285
 286         if (bs && bs->bs_asic_type < PCIIO_ASIC_MAX_TYPES) {
 287                 SN_PCIDEV_BUSPROVIDER(dev) = sn_pci_provider[bs->bs_asic_type];
 288         } else {
 289                 SN_PCIDEV_BUSPROVIDER(dev) = &sn_pci_default_provider;
 290         }
 291
 292         /* Only set up IRQ stuff if this device has a host bus context */
 293         if (bs && sn_irq_info->irq_irq) {
 294                 SN_PCIDEV_INFO(dev)->pdi_sn_irq_info = sn_irq_info;
 295                 dev->irq = SN_PCIDEV_INFO(dev)->pdi_sn_irq_info->irq_irq;
 296                 sn_irq_fixup(dev, sn_irq_info);
 297         }
 298 }
 299
 300 /*
 301  * sn_pci_controller_fixup() - This routine sets up a bus's resources
 302  * consistent with the Linux PCI abstraction layer.
 303  */
 304 static void sn_pci_controller_fixup(int segment, int busnum)
 305 {
 306         int status = 0;
 307         int nasid, cnode;
 308         struct pci_bus *bus;
 309         struct pci_controller *controller;
 310         struct pcibus_bussoft *prom_bussoft_ptr;
 311         struct hubdev_info *hubdev_info;
 312         void *provider_soft;
 313         struct sn_pcibus_provider *provider;
 314
 315         status =
 316             sal_get_pcibus_info((u64) segment, (u64) busnum,
 317                                 (u64) ia64_tpa(&prom_bussoft_ptr));
 318         if (status > 0) {
 319                 return;         /* bus # does not exist */
 320         }
 321
 322         prom_bussoft_ptr = __va(prom_bussoft_ptr);
 323         controller = sn_alloc_pci_sysdata();
 324         /* controller non-zero is BUG'd in sn_alloc_pci_sysdata */
 325
 326         bus = pci_scan_bus(busnum, &pci_root_ops, controller);
 327         if (bus == NULL) {
 328                 return;         /* error, or bus already scanned */
 329         }
 330
 331         /*
 332          * Per-provider fixup.  Copies the contents from prom to local
 333          * area and links SN_PCIBUS_BUSSOFT().
 334          */
 335
 336         if (prom_bussoft_ptr->bs_asic_type >= PCIIO_ASIC_MAX_TYPES) {
 337                 return;         /* unsupported asic type */
 338         }
 339
 340         provider = sn_pci_provider[prom_bussoft_ptr->bs_asic_type];
 341         if (provider == NULL) {
 342                 return;         /* no provider registerd for this asic */
 343         }
 344
 345         provider_soft = NULL;
 346         if (provider->bus_fixup) {
 347                 provider_soft = (*provider->bus_fixup) (prom_bussoft_ptr);
 348         }
 349
 350         if (provider_soft == NULL) {
 351                 return;         /* fixup failed or not applicable */
 352         }
 353
 354         /*
 355          * Generic bus fixup goes here.  Don't reference prom_bussoft_ptr
 356          * after this point.
 357          */
 358
 359         bus->sysdata = controller;
 360         PCI_CONTROLLER(bus)->platform_data = provider_soft;
 361
 362         nasid = NASID_GET(SN_PCIBUS_BUSSOFT(bus)->bs_base);
 363         cnode = nasid_to_cnodeid(nasid);
 364         hubdev_info = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
 365         SN_PCIBUS_BUSSOFT(bus)->bs_xwidget_info =
 366             &(hubdev_info->hdi_xwidget_info[SN_PCIBUS_BUSSOFT(bus)->bs_xid]);
 367 }
 368
 369 /*
 370  * Ugly hack to get PCI setup until we have a proper ACPI namespace.
 371  */
 372
 373 #define PCI_BUSES_TO_SCAN 256
 374
 375 static int __init sn_pci_init(void)
 376 {
 377         int i = 0;
 378         struct pci_dev *pci_dev = NULL;
 379         extern void sn_init_cpei_timer(void);
 380 #ifdef CONFIG_PROC_FS
 381         extern void register_sn_procfs(void);
 382 #endif
 383
 384         if (!ia64_platform_is("sn2") || IS_RUNNING_ON_SIMULATOR())
 385                 return 0;
 386
 387         /*
 388          * prime sn_pci_provider[].  Individial provider init routines will
 389          * override their respective default entries.
 390          */
 391
 392         for (i = 0; i < PCIIO_ASIC_MAX_TYPES; i++)
 393                 sn_pci_provider[i] = &sn_pci_default_provider;
 394
 395         pcibr_init_provider();
 396
 397         /*
 398          * This is needed to avoid bounce limit checks in the blk layer
 399          */
 400         ia64_max_iommu_merge_mask = ~PAGE_MASK;
 401         sn_fixup_ionodes();
 402         sn_irq = kmalloc(sizeof(struct sn_irq_info *) * NR_IRQS, GFP_KERNEL);
 403         if (sn_irq <= 0)
 404                 BUG();          /* Canno afford to run out of memory. */
 405         memset(sn_irq, 0, sizeof(struct sn_irq_info *) * NR_IRQS);
 406
 407         sn_init_cpei_timer();
 408
 409 #ifdef CONFIG_PROC_FS
 410         register_sn_procfs();
 411 #endif
 412
 413         for (i = 0; i < PCI_BUSES_TO_SCAN; i++) {
 414                 sn_pci_controller_fixup(0, i);
 415         }
 416
 417         /*
 418          * Generic Linux PCI Layer has created the pci_bus and pci_dev
 419          * structures - time for us to add our SN PLatform specific
 420          * information.
 421          */
 422
 423         while ((pci_dev =
 424                 pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pci_dev)) != NULL) {
 425                 sn_pci_fixup_slot(pci_dev);
 426         }
 427
 428         sn_ioif_inited = 1;     /* sn I/O infrastructure now initialized */
 429
 430         return 0;
 431 }
 432
 433 /*
 434  * hubdev_init_node() - Creates the HUB data structure and link them to it's
 435  *      own NODE specific data area.
 436  */
 437 void hubdev_init_node(nodepda_t * npda, cnodeid_t node)
 438 {
 439
 440         struct hubdev_info *hubdev_info;
 441
 442         if (node >= num_online_nodes()) /* Headless/memless IO nodes */
 443                 hubdev_info =
 444                     (struct hubdev_info *)alloc_bootmem_node(NODE_DATA(0),
 445                                                              sizeof(struct
 446                                                                     hubdev_info));
 447         else
 448                 hubdev_info =
 449                     (struct hubdev_info *)alloc_bootmem_node(NODE_DATA(node),
 450                                                              sizeof(struct
 451                                                                     hubdev_info));
 452         npda->pdinfo = (void *)hubdev_info;
 453
 454 }
 455
 456 geoid_t
 457 cnodeid_get_geoid(cnodeid_t cnode)
 458 {
 459
 460         struct hubdev_info *hubdev;
 461
 462         hubdev = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
 463         return hubdev->hdi_geoid;
 464
 465 }
 466
 467 subsys_initcall(sn_pci_init);