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