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) 2006 Silicon Graphics, Inc. All rights reserved. 7 */ 8 9#include <linux/bootmem.h> 10#include <linux/slab.h> 11#include <asm/sn/types.h> 12#include <asm/sn/addrs.h> 13#include <asm/sn/sn_feature_sets.h> 14#include <asm/sn/geo.h> 15#include <asm/sn/io.h> 16#include <asm/sn/l1.h> 17#include <asm/sn/module.h> 18#include <asm/sn/pcibr_provider.h> 19#include <asm/sn/pcibus_provider_defs.h> 20#include <asm/sn/pcidev.h> 21#include <asm/sn/simulator.h> 22#include <asm/sn/sn_sal.h> 23#include <asm/sn/tioca_provider.h> 24#include <asm/sn/tioce_provider.h> 25#include "xtalk/hubdev.h" 26#include "xtalk/xwidgetdev.h" 27#include <linux/acpi.h> 28#include <asm/sn/sn2/sn_hwperf.h> 29#include <asm/sn/acpi.h> 30 31extern void sn_init_cpei_timer(void); 32extern void register_sn_procfs(void); 33extern void sn_io_acpi_init(void); 34extern void sn_io_init(void); 35 36 37static struct list_head sn_sysdata_list; 38 39/* sysdata list struct */ 40struct sysdata_el { 41 struct list_head entry; 42 void *sysdata; 43}; 44 45int sn_ioif_inited; /* SN I/O infrastructure initialized? */ 46 47int sn_acpi_rev; /* SN ACPI revision */ 48EXPORT_SYMBOL_GPL(sn_acpi_rev); 49 50struct sn_pcibus_provider *sn_pci_provider[PCIIO_ASIC_MAX_TYPES]; /* indexed by asic type */ 51 52/* 53 * Hooks and struct for unsupported pci providers 54 */ 55 56static dma_addr_t 57sn_default_pci_map(struct pci_dev *pdev, unsigned long paddr, size_t size, int type) 58{ 59 return 0; 60} 61 62static void 63sn_default_pci_unmap(struct pci_dev *pdev, dma_addr_t addr, int direction) 64{ 65 return; 66} 67 68static void * 69sn_default_pci_bus_fixup(struct pcibus_bussoft *soft, struct pci_controller *controller) 70{ 71 return NULL; 72} 73 74static struct sn_pcibus_provider sn_pci_default_provider = { 75 .dma_map = sn_default_pci_map, 76 .dma_map_consistent = sn_default_pci_map, 77 .dma_unmap = sn_default_pci_unmap, 78 .bus_fixup = sn_default_pci_bus_fixup, 79}; 80 81/* 82 * Retrieve the DMA Flush List given nasid, widget, and device. 83 * This list is needed to implement the WAR - Flush DMA data on PIO Reads. 84 */ 85static inline u64 86sal_get_device_dmaflush_list(u64 nasid, u64 widget_num, u64 device_num, 87 u64 address) 88{ 89 struct ia64_sal_retval ret_stuff; 90 ret_stuff.status = 0; 91 ret_stuff.v0 = 0; 92 93 SAL_CALL_NOLOCK(ret_stuff, 94 (u64) SN_SAL_IOIF_GET_DEVICE_DMAFLUSH_LIST, 95 (u64) nasid, (u64) widget_num, 96 (u64) device_num, (u64) address, 0, 0, 0); 97 return ret_stuff.status; 98} 99 100/* 101 * sn_pcidev_info_get() - Retrieve the pcidev_info struct for the specified 102 * device. 103 */ 104inline struct pcidev_info * 105sn_pcidev_info_get(struct pci_dev *dev) 106{ 107 struct pcidev_info *pcidev; 108 109 list_for_each_entry(pcidev, 110 &(SN_PLATFORM_DATA(dev)->pcidev_info), pdi_list) { 111 if (pcidev->pdi_linux_pcidev == dev) 112 return pcidev; 113 } 114 return NULL; 115} 116 117/* Older PROM flush WAR 118 * 119 * 01/16/06 -- This war will be in place until a new official PROM is released. 120 * Additionally note that the struct sn_flush_device_war also has to be 121 * removed from arch/ia64/sn/include/xtalk/hubdev.h 122 */ 123 124static s64 sn_device_fixup_war(u64 nasid, u64 widget, int device, 125 struct sn_flush_device_common *common) 126{ 127 struct sn_flush_device_war *war_list; 128 struct sn_flush_device_war *dev_entry; 129 struct ia64_sal_retval isrv = {0,0,0,0}; 130 131 printk_once(KERN_WARNING 132 "PROM version < 4.50 -- implementing old PROM flush WAR\n"); 133 134 war_list = kzalloc(DEV_PER_WIDGET * sizeof(*war_list), GFP_KERNEL); 135 BUG_ON(!war_list); 136 137 SAL_CALL_NOLOCK(isrv, SN_SAL_IOIF_GET_WIDGET_DMAFLUSH_LIST, 138 nasid, widget, __pa(war_list), 0, 0, 0 ,0); 139 if (isrv.status) 140 panic("sn_device_fixup_war failed: %s\n", 141 ia64_sal_strerror(isrv.status)); 142 143 dev_entry = war_list + device; 144 memcpy(common,dev_entry, sizeof(*common)); 145 kfree(war_list); 146 147 return isrv.status; 148} 149 150/* 151 * sn_common_hubdev_init() - This routine is called to initialize the HUB data 152 * structure for each node in the system. 153 */ 154void __init 155sn_common_hubdev_init(struct hubdev_info *hubdev) 156{ 157 158 struct sn_flush_device_kernel *sn_flush_device_kernel; 159 struct sn_flush_device_kernel *dev_entry; 160 s64 status; 161 int widget, device, size; 162 163 /* Attach the error interrupt handlers */ 164 if (hubdev->hdi_nasid & 1) /* If TIO */ 165 ice_error_init(hubdev); 166 else 167 hub_error_init(hubdev); 168 169 for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++) 170 hubdev->hdi_xwidget_info[widget].xwi_hubinfo = hubdev; 171 172 if (!hubdev->hdi_flush_nasid_list.widget_p) 173 return; 174 175 size = (HUB_WIDGET_ID_MAX + 1) * 176 sizeof(struct sn_flush_device_kernel *); 177 hubdev->hdi_flush_nasid_list.widget_p = 178 kzalloc(size, GFP_KERNEL); 179 BUG_ON(!hubdev->hdi_flush_nasid_list.widget_p); 180 181 for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++) { 182 size = DEV_PER_WIDGET * 183 sizeof(struct sn_flush_device_kernel); 184 sn_flush_device_kernel = kzalloc(size, GFP_KERNEL); 185 BUG_ON(!sn_flush_device_kernel); 186 187 dev_entry = sn_flush_device_kernel; 188 for (device = 0; device < DEV_PER_WIDGET; 189 device++, dev_entry++) { 190 size = sizeof(struct sn_flush_device_common); 191 dev_entry->common = kzalloc(size, GFP_KERNEL); 192 BUG_ON(!dev_entry->common); 193 if (sn_prom_feature_available(PRF_DEVICE_FLUSH_LIST)) 194 status = sal_get_device_dmaflush_list( 195 hubdev->hdi_nasid, widget, device, 196 (u64)(dev_entry->common)); 197 else 198 status = sn_device_fixup_war(hubdev->hdi_nasid, 199 widget, device, 200 dev_entry->common); 201 if (status != SALRET_OK) 202 panic("SAL call failed: %s\n", 203 ia64_sal_strerror(status)); 204 205 spin_lock_init(&dev_entry->sfdl_flush_lock); 206 } 207 208 if (sn_flush_device_kernel) 209 hubdev->hdi_flush_nasid_list.widget_p[widget] = 210 sn_flush_device_kernel; 211 } 212} 213 214void sn_pci_unfixup_slot(struct pci_dev *dev) 215{ 216 struct pci_dev *host_pci_dev = SN_PCIDEV_INFO(dev)->host_pci_dev; 217 218 sn_irq_unfixup(dev); 219 pci_dev_put(host_pci_dev); 220 pci_dev_put(dev); 221} 222 223/* 224 * sn_pci_fixup_slot() 225 */ 226void sn_pci_fixup_slot(struct pci_dev *dev, struct pcidev_info *pcidev_info, 227 struct sn_irq_info *sn_irq_info) 228{ 229 int segment = pci_domain_nr(dev->bus); 230 struct pcibus_bussoft *bs; 231 struct pci_bus *host_pci_bus; 232 struct pci_dev *host_pci_dev; 233 unsigned int bus_no, devfn; 234 235 pci_dev_get(dev); /* for the sysdata pointer */ 236 237 /* Add pcidev_info to list in pci_controller.platform_data */ 238 list_add_tail(&pcidev_info->pdi_list, 239 &(SN_PLATFORM_DATA(dev->bus)->pcidev_info)); 240 /* 241 * Using the PROMs values for the PCI host bus, get the Linux 242 * PCI host_pci_dev struct and set up host bus linkages 243 */ 244 245 bus_no = (pcidev_info->pdi_slot_host_handle >> 32) & 0xff; 246 devfn = pcidev_info->pdi_slot_host_handle & 0xffffffff; 247 host_pci_bus = pci_find_bus(segment, bus_no); 248 host_pci_dev = pci_get_slot(host_pci_bus, devfn); 249 250 pcidev_info->host_pci_dev = host_pci_dev; 251 pcidev_info->pdi_linux_pcidev = dev; 252 pcidev_info->pdi_host_pcidev_info = SN_PCIDEV_INFO(host_pci_dev); 253 bs = SN_PCIBUS_BUSSOFT(dev->bus); 254 pcidev_info->pdi_pcibus_info = bs; 255 256 if (bs && bs->bs_asic_type < PCIIO_ASIC_MAX_TYPES) { 257 SN_PCIDEV_BUSPROVIDER(dev) = sn_pci_provider[bs->bs_asic_type]; 258 } else { 259 SN_PCIDEV_BUSPROVIDER(dev) = &sn_pci_default_provider; 260 } 261 262 /* Only set up IRQ stuff if this device has a host bus context */ 263 if (bs && sn_irq_info->irq_irq) { 264 pcidev_info->pdi_sn_irq_info = sn_irq_info; 265 dev->irq = pcidev_info->pdi_sn_irq_info->irq_irq; 266 sn_irq_fixup(dev, sn_irq_info); 267 } else { 268 pcidev_info->pdi_sn_irq_info = NULL; 269 kfree(sn_irq_info); 270 } 271} 272 273/* 274 * sn_common_bus_fixup - Perform platform specific bus fixup. 275 * Execute the ASIC specific fixup routine 276 * for this bus. 277 */ 278void 279sn_common_bus_fixup(struct pci_bus *bus, 280 struct pcibus_bussoft *prom_bussoft_ptr) 281{ 282 int cnode; 283 struct pci_controller *controller; 284 struct hubdev_info *hubdev_info; 285 int nasid; 286 void *provider_soft; 287 struct sn_pcibus_provider *provider; 288 struct sn_platform_data *sn_platform_data; 289 290 controller = PCI_CONTROLLER(bus); 291 /* 292 * Per-provider fixup. Copies the bus soft structure from prom 293 * to local area and links SN_PCIBUS_BUSSOFT(). 294 */ 295 296 if (prom_bussoft_ptr->bs_asic_type >= PCIIO_ASIC_MAX_TYPES) { 297 printk(KERN_WARNING "sn_common_bus_fixup: Unsupported asic type, %d", 298 prom_bussoft_ptr->bs_asic_type); 299 return; 300 } 301 302 if (prom_bussoft_ptr->bs_asic_type == PCIIO_ASIC_TYPE_PPB) 303 return; /* no further fixup necessary */ 304 305 provider = sn_pci_provider[prom_bussoft_ptr->bs_asic_type]; 306 if (provider == NULL) 307 panic("sn_common_bus_fixup: No provider registered for this asic type, %d", 308 prom_bussoft_ptr->bs_asic_type); 309 310 if (provider->bus_fixup) 311 provider_soft = (*provider->bus_fixup) (prom_bussoft_ptr, 312 controller); 313 else 314 provider_soft = NULL; 315 316 /* 317 * Generic bus fixup goes here. Don't reference prom_bussoft_ptr 318 * after this point. 319 */ 320 controller->platform_data = kzalloc(sizeof(struct sn_platform_data), 321 GFP_KERNEL); 322 BUG_ON(controller->platform_data == NULL); 323 sn_platform_data = 324 (struct sn_platform_data *) controller->platform_data; 325 sn_platform_data->provider_soft = provider_soft; 326 INIT_LIST_HEAD(&((struct sn_platform_data *) 327 controller->platform_data)->pcidev_info); 328 nasid = NASID_GET(SN_PCIBUS_BUSSOFT(bus)->bs_base); 329 cnode = nasid_to_cnodeid(nasid); 330 hubdev_info = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo); 331 SN_PCIBUS_BUSSOFT(bus)->bs_xwidget_info = 332 &(hubdev_info->hdi_xwidget_info[SN_PCIBUS_BUSSOFT(bus)->bs_xid]); 333 334 /* 335 * If the node information we obtained during the fixup phase is 336 * invalid then set controller->node to -1 (undetermined) 337 */ 338 if (controller->node >= num_online_nodes()) { 339 struct pcibus_bussoft *b = SN_PCIBUS_BUSSOFT(bus); 340 341 printk(KERN_WARNING "Device ASIC=%u XID=%u PBUSNUM=%u " 342 "L_IO=%llx L_MEM=%llx BASE=%llx\n", 343 b->bs_asic_type, b->bs_xid, b->bs_persist_busnum, 344 b->bs_legacy_io, b->bs_legacy_mem, b->bs_base); 345 printk(KERN_WARNING "on node %d but only %d nodes online." 346 "Association set to undetermined.\n", 347 controller->node, num_online_nodes()); 348 controller->node = -1; 349 } 350} 351 352void sn_bus_store_sysdata(struct pci_dev *dev) 353{ 354 struct sysdata_el *element; 355 356 element = kzalloc(sizeof(struct sysdata_el), GFP_KERNEL); 357 if (!element) { 358 dev_dbg(&dev->dev, "%s: out of memory!\n", __func__); 359 return; 360 } 361 element->sysdata = SN_PCIDEV_INFO(dev); 362 list_add(&element->entry, &sn_sysdata_list); 363} 364 365void sn_bus_free_sysdata(void) 366{ 367 struct sysdata_el *element; 368 struct list_head *list, *safe; 369 370 list_for_each_safe(list, safe, &sn_sysdata_list) { 371 element = list_entry(list, struct sysdata_el, entry); 372 list_del(&element->entry); 373 list_del(&(((struct pcidev_info *) 374 (element->sysdata))->pdi_list)); 375 kfree(element->sysdata); 376 kfree(element); 377 } 378 return; 379} 380 381/* 382 * hubdev_init_node() - Creates the HUB data structure and link them to it's 383 * own NODE specific data area. 384 */ 385void __init hubdev_init_node(nodepda_t * npda, cnodeid_t node) 386{ 387 struct hubdev_info *hubdev_info; 388 int size; 389 pg_data_t *pg; 390 391 size = sizeof(struct hubdev_info); 392 393 if (node >= num_online_nodes()) /* Headless/memless IO nodes */ 394 pg = NODE_DATA(0); 395 else 396 pg = NODE_DATA(node); 397 398 hubdev_info = (struct hubdev_info *)alloc_bootmem_node(pg, size); 399 400 npda->pdinfo = (void *)hubdev_info; 401} 402 403geoid_t 404cnodeid_get_geoid(cnodeid_t cnode) 405{ 406 struct hubdev_info *hubdev; 407 408 hubdev = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo); 409 return hubdev->hdi_geoid; 410} 411 412void sn_generate_path(struct pci_bus *pci_bus, char *address) 413{ 414 nasid_t nasid; 415 cnodeid_t cnode; 416 geoid_t geoid; 417 moduleid_t moduleid; 418 u16 bricktype; 419 420 nasid = NASID_GET(SN_PCIBUS_BUSSOFT(pci_bus)->bs_base); 421 cnode = nasid_to_cnodeid(nasid); 422 geoid = cnodeid_get_geoid(cnode); 423 moduleid = geo_module(geoid); 424 425 sprintf(address, "module_%c%c%c%c%.2d", 426 '0'+RACK_GET_CLASS(MODULE_GET_RACK(moduleid)), 427 '0'+RACK_GET_GROUP(MODULE_GET_RACK(moduleid)), 428 '0'+RACK_GET_NUM(MODULE_GET_RACK(moduleid)), 429 MODULE_GET_BTCHAR(moduleid), MODULE_GET_BPOS(moduleid)); 430 431 /* Tollhouse requires slot id to be displayed */ 432 bricktype = MODULE_GET_BTYPE(moduleid); 433 if ((bricktype == L1_BRICKTYPE_191010) || 434 (bricktype == L1_BRICKTYPE_1932)) 435 sprintf(address + strlen(address), "^%d", 436 geo_slot(geoid)); 437} 438 439void __devinit 440sn_pci_fixup_bus(struct pci_bus *bus) 441{ 442 443 if (SN_ACPI_BASE_SUPPORT()) 444 sn_acpi_bus_fixup(bus); 445 else 446 sn_bus_fixup(bus); 447} 448 449/* 450 * sn_io_early_init - Perform early IO (and some non-IO) initialization. 451 * In particular, setup the sn_pci_provider[] array. 452 * This needs to be done prior to any bus scanning 453 * (acpi_scan_init()) in the ACPI case, as the SN 454 * bus fixup code will reference the array. 455 */ 456static int __init 457sn_io_early_init(void) 458{ 459 int i; 460 461 if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM()) 462 return 0; 463 464 /* we set the acpi revision to that of the DSDT table OEM rev. */ 465 { 466 struct acpi_table_header *header = NULL; 467 468 acpi_get_table(ACPI_SIG_DSDT, 1, &header); 469 BUG_ON(header == NULL); 470 sn_acpi_rev = header->oem_revision; 471 } 472 473 /* 474 * prime sn_pci_provider[]. Individual provider init routines will 475 * override their respective default entries. 476 */ 477 478 for (i = 0; i < PCIIO_ASIC_MAX_TYPES; i++) 479 sn_pci_provider[i] = &sn_pci_default_provider; 480 481 pcibr_init_provider(); 482 tioca_init_provider(); 483 tioce_init_provider(); 484 485 /* 486 * This is needed to avoid bounce limit checks in the blk layer 487 */ 488 ia64_max_iommu_merge_mask = ~PAGE_MASK; 489 490 sn_irq_lh_init(); 491 INIT_LIST_HEAD(&sn_sysdata_list); 492 sn_init_cpei_timer(); 493 494#ifdef CONFIG_PROC_FS 495 register_sn_procfs(); 496#endif 497 498 { 499 struct acpi_table_header *header; 500 (void)acpi_get_table(ACPI_SIG_DSDT, 1, &header); 501 printk(KERN_INFO "ACPI DSDT OEM Rev 0x%x\n", 502 header->oem_revision); 503 } 504 if (SN_ACPI_BASE_SUPPORT()) 505 sn_io_acpi_init(); 506 else 507 sn_io_init(); 508 return 0; 509} 510 511arch_initcall(sn_io_early_init); 512 513/* 514 * sn_io_late_init() - Perform any final platform specific IO initialization. 515 */ 516 517int __init 518sn_io_late_init(void) 519{ 520 struct pci_bus *bus; 521 struct pcibus_bussoft *bussoft; 522 cnodeid_t cnode; 523 nasid_t nasid; 524 cnodeid_t near_cnode; 525 526 if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM()) 527 return 0; 528 529 /* 530 * Setup closest node in pci_controller->node for 531 * PIC, TIOCP, TIOCE (TIOCA does it during bus fixup using 532 * info from the PROM). 533 */ 534 bus = NULL; 535 while ((bus = pci_find_next_bus(bus)) != NULL) { 536 bussoft = SN_PCIBUS_BUSSOFT(bus); 537 nasid = NASID_GET(bussoft->bs_base); 538 cnode = nasid_to_cnodeid(nasid); 539 if ((bussoft->bs_asic_type == PCIIO_ASIC_TYPE_TIOCP) || 540 (bussoft->bs_asic_type == PCIIO_ASIC_TYPE_TIOCE) || 541 (bussoft->bs_asic_type == PCIIO_ASIC_TYPE_PIC)) { 542 /* PCI Bridge: find nearest node with CPUs */ 543 int e = sn_hwperf_get_nearest_node(cnode, NULL, 544 &near_cnode); 545 if (e < 0) { 546 near_cnode = (cnodeid_t)-1; /* use any node */ 547 printk(KERN_WARNING "sn_io_late_init: failed " 548 "to find near node with CPUs for " 549 "node %d, err=%d\n", cnode, e); 550 } 551 PCI_CONTROLLER(bus)->node = near_cnode; 552 } 553 } 554 555 sn_ioif_inited = 1; /* SN I/O infrastructure now initialized */ 556 557 return 0; 558} 559 560fs_initcall(sn_io_late_init); 561 562EXPORT_SYMBOL(sn_pci_unfixup_slot); 563EXPORT_SYMBOL(sn_bus_store_sysdata); 564EXPORT_SYMBOL(sn_bus_free_sysdata); 565EXPORT_SYMBOL(sn_generate_path); 566