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