arch/powerpc/platforms/iseries/pci.c

   1 /*
   2  * Copyright (C) 2001 Allan Trautman, IBM Corporation
   3  *
   4  * iSeries specific routines for PCI.
   5  *
   6  * Based on code from pci.c and iSeries_pci.c 32bit
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  21  */
  22 #include <linux/kernel.h>
  23 #include <linux/list.h>
  24 #include <linux/string.h>
  25 #include <linux/init.h>
  26 #include <linux/module.h>
  27 #include <linux/ide.h>
  28 #include <linux/pci.h>
  29
  30 #include <asm/io.h>
  31 #include <asm/irq.h>
  32 #include <asm/prom.h>
  33 #include <asm/machdep.h>
  34 #include <asm/pci-bridge.h>
  35 #include <asm/iommu.h>
  36 #include <asm/abs_addr.h>
  37 #include <asm/firmware.h>
  38
  39 #include <asm/iseries/hv_call_xm.h>
  40 #include <asm/iseries/mf.h>
  41 #include <asm/iseries/iommu.h>
  42
  43 #include <asm/ppc-pci.h>
  44
  45 #include "irq.h"
  46 #include "pci.h"
  47 #include "call_pci.h"
  48
  49 /*
  50  * Forward declares of prototypes.
  51  */
  52 static struct device_node *find_Device_Node(int bus, int devfn);
  53
  54 static int Pci_Retry_Max = 3;   /* Only retry 3 times  */
  55 static int Pci_Error_Flag = 1;  /* Set Retry Error on. */
  56
  57 static struct pci_ops iSeries_pci_ops;
  58
  59 /*
  60  * Table defines
  61  * Each Entry size is 4 MB * 1024 Entries = 4GB I/O address space.
  62  */
  63 #define IOMM_TABLE_MAX_ENTRIES  1024
  64 #define IOMM_TABLE_ENTRY_SIZE   0x0000000000400000UL
  65 #define BASE_IO_MEMORY          0xE000000000000000UL
  66
  67 static unsigned long max_io_memory = BASE_IO_MEMORY;
  68 static long current_iomm_table_entry;
  69
  70 /*
  71  * Lookup Tables.
  72  */
  73 static struct device_node *iomm_table[IOMM_TABLE_MAX_ENTRIES];
  74 static u8 iobar_table[IOMM_TABLE_MAX_ENTRIES];
  75
  76 static const char pci_io_text[] = "iSeries PCI I/O";
  77 static DEFINE_SPINLOCK(iomm_table_lock);
  78
  79 /*
  80  * iomm_table_allocate_entry
  81  *
  82  * Adds pci_dev entry in address translation table
  83  *
  84  * - Allocates the number of entries required in table base on BAR
  85  *   size.
  86  * - Allocates starting at BASE_IO_MEMORY and increases.
  87  * - The size is round up to be a multiple of entry size.
  88  * - CurrentIndex is incremented to keep track of the last entry.
  89  * - Builds the resource entry for allocated BARs.
  90  */
  91 static void iomm_table_allocate_entry(struct pci_dev *dev, int bar_num)
  92 {
  93         struct resource *bar_res = &dev->resource[bar_num];
  94         long bar_size = pci_resource_len(dev, bar_num);
  95
  96         /*
  97          * No space to allocate, quick exit, skip Allocation.
  98          */
  99         if (bar_size == 0)
 100                 return;
 101         /*
 102          * Set Resource values.
 103          */
 104         spin_lock(&iomm_table_lock);
 105         bar_res->name = pci_io_text;
 106         bar_res->start = BASE_IO_MEMORY +
 107                 IOMM_TABLE_ENTRY_SIZE * current_iomm_table_entry;
 108         bar_res->end = bar_res->start + bar_size - 1;
 109         /*
 110          * Allocate the number of table entries needed for BAR.
 111          */
 112         while (bar_size > 0 ) {
 113                 iomm_table[current_iomm_table_entry] = dev->sysdata;
 114                 iobar_table[current_iomm_table_entry] = bar_num;
 115                 bar_size -= IOMM_TABLE_ENTRY_SIZE;
 116                 ++current_iomm_table_entry;
 117         }
 118         max_io_memory = BASE_IO_MEMORY +
 119                 IOMM_TABLE_ENTRY_SIZE * current_iomm_table_entry;
 120         spin_unlock(&iomm_table_lock);
 121 }
 122
 123 /*
 124  * allocate_device_bars
 125  *
 126  * - Allocates ALL pci_dev BAR's and updates the resources with the
 127  *   BAR value.  BARS with zero length will have the resources
 128  *   The HvCallPci_getBarParms is used to get the size of the BAR
 129  *   space.  It calls iomm_table_allocate_entry to allocate
 130  *   each entry.
 131  * - Loops through The Bar resources(0 - 5) including the ROM
 132  *   is resource(6).
 133  */
 134 static void allocate_device_bars(struct pci_dev *dev)
 135 {
 136         int bar_num;
 137
 138         for (bar_num = 0; bar_num <= PCI_ROM_RESOURCE; ++bar_num)
 139                 iomm_table_allocate_entry(dev, bar_num);
 140 }
 141
 142 /*
 143  * Log error information to system console.
 144  * Filter out the device not there errors.
 145  * PCI: EADs Connect Failed 0x18.58.10 Rc: 0x00xx
 146  * PCI: Read Vendor Failed 0x18.58.10 Rc: 0x00xx
 147  * PCI: Connect Bus Unit Failed 0x18.58.10 Rc: 0x00xx
 148  */
 149 static void pci_Log_Error(char *Error_Text, int Bus, int SubBus,
 150                 int AgentId, int HvRc)
 151 {
 152         if (HvRc == 0x0302)
 153                 return;
 154         printk(KERN_ERR "PCI: %s Failed: 0x%02X.%02X.%02X Rc: 0x%04X",
 155                Error_Text, Bus, SubBus, AgentId, HvRc);
 156 }
 157
 158 /*
 159  * iSeries_pcibios_init
 160  *
 161  * Description:
 162  *   This function checks for all possible system PCI host bridges that connect
 163  *   PCI buses.  The system hypervisor is queried as to the guest partition
 164  *   ownership status.  A pci_controller is built for any bus which is partially
 165  *   owned or fully owned by this guest partition.
 166  */
 167 void iSeries_pcibios_init(void)
 168 {
 169         struct pci_controller *phb;
 170         struct device_node *root = of_find_node_by_path("/");
 171         struct device_node *node = NULL;
 172
 173         if (root == NULL) {
 174                 printk(KERN_CRIT "iSeries_pcibios_init: can't find root "
 175                                 "of device tree\n");
 176                 return;
 177         }
 178         while ((node = of_get_next_child(root, node)) != NULL) {
 179                 HvBusNumber bus;
 180                 const u32 *busp;
 181
 182                 if ((node->type == NULL) || (strcmp(node->type, "pci") != 0))
 183                         continue;
 184
 185                 busp = get_property(node, "bus-range", NULL);
 186                 if (busp == NULL)
 187                         continue;
 188                 bus = *busp;
 189                 printk("bus %d appears to exist\n", bus);
 190                 phb = pcibios_alloc_controller(node);
 191                 if (phb == NULL)
 192                         continue;
 193
 194                 phb->pci_mem_offset = phb->local_number = bus;
 195                 phb->first_busno = bus;
 196                 phb->last_busno = bus;
 197                 phb->ops = &iSeries_pci_ops;
 198         }
 199
 200         of_node_put(root);
 201
 202         pci_devs_phb_init();
 203 }
 204
 205 /*
 206  * iSeries_pci_final_fixup(void)
 207  */
 208 void __init iSeries_pci_final_fixup(void)
 209 {
 210         struct pci_dev *pdev = NULL;
 211         struct device_node *node;
 212         int DeviceCount = 0;
 213
 214         /* Fix up at the device node and pci_dev relationship */
 215         mf_display_src(0xC9000100);
 216
 217         printk("pcibios_final_fixup\n");
 218         for_each_pci_dev(pdev) {
 219                 node = find_Device_Node(pdev->bus->number, pdev->devfn);
 220                 printk("pci dev %p (%x.%x), node %p\n", pdev,
 221                        pdev->bus->number, pdev->devfn, node);
 222
 223                 if (node != NULL) {
 224                         struct pci_dn *pdn = PCI_DN(node);
 225                         const u32 *agent;
 226
 227                         agent = get_property(node, "linux,agent-id", NULL);
 228                         if ((pdn != NULL) && (agent != NULL)) {
 229                                 u8 irq = iSeries_allocate_IRQ(pdn->busno, 0,
 230                                                 pdn->bussubno);
 231                                 int err;
 232
 233                                 err = HvCallXm_connectBusUnit(pdn->busno, pdn->bussubno,
 234                                                 *agent, irq);
 235                                 if (err)
 236                                         pci_Log_Error("Connect Bus Unit",
 237                                                 pdn->busno, pdn->bussubno, *agent, err);
 238                                 else {
 239                                         err = HvCallPci_configStore8(pdn->busno, pdn->bussubno,
 240                                                         *agent,
 241                                                         PCI_INTERRUPT_LINE,
 242                                                         irq);
 243                                         if (err)
 244                                                 pci_Log_Error("PciCfgStore Irq Failed!",
 245                                                         pdn->busno, pdn->bussubno, *agent, err);
 246                                 }
 247                                 if (!err)
 248                                         pdev->irq = irq;
 249                         }
 250
 251                         ++DeviceCount;
 252                         pdev->sysdata = (void *)node;
 253                         PCI_DN(node)->pcidev = pdev;
 254                         allocate_device_bars(pdev);
 255                         iSeries_Device_Information(pdev, DeviceCount);
 256                         iommu_devnode_init_iSeries(node);
 257                 } else
 258                         printk("PCI: Device Tree not found for 0x%016lX\n",
 259                                         (unsigned long)pdev);
 260         }
 261         iSeries_activate_IRQs();
 262         mf_display_src(0xC9000200);
 263 }
 264
 265 void pcibios_fixup_bus(struct pci_bus *PciBus)
 266 {
 267 }
 268
 269 void pcibios_fixup_resources(struct pci_dev *pdev)
 270 {
 271 }
 272
 273 /*
 274  * Look down the chain to find the matching Device Device
 275  */
 276 static struct device_node *find_Device_Node(int bus, int devfn)
 277 {
 278         struct device_node *node;
 279
 280         for (node = NULL; (node = of_find_all_nodes(node)); ) {
 281                 struct pci_dn *pdn = PCI_DN(node);
 282
 283                 if (pdn && (bus == pdn->busno) && (devfn == pdn->devfn))
 284                         return node;
 285         }
 286         return NULL;
 287 }
 288
 289 #if 0
 290 /*
 291  * Returns the device node for the passed pci_dev
 292  * Sanity Check Node PciDev to passed pci_dev
 293  * If none is found, returns a NULL which the client must handle.
 294  */
 295 static struct device_node *get_Device_Node(struct pci_dev *pdev)
 296 {
 297         struct device_node *node;
 298
 299         node = pdev->sysdata;
 300         if (node == NULL || PCI_DN(node)->pcidev != pdev)
 301                 node = find_Device_Node(pdev->bus->number, pdev->devfn);
 302         return node;
 303 }
 304 #endif
 305
 306 /*
 307  * Config space read and write functions.
 308  * For now at least, we look for the device node for the bus and devfn
 309  * that we are asked to access.  It may be possible to translate the devfn
 310  * to a subbus and deviceid more directly.
 311  */
 312 static u64 hv_cfg_read_func[4]  = {
 313         HvCallPciConfigLoad8, HvCallPciConfigLoad16,
 314         HvCallPciConfigLoad32, HvCallPciConfigLoad32
 315 };
 316
 317 static u64 hv_cfg_write_func[4] = {
 318         HvCallPciConfigStore8, HvCallPciConfigStore16,
 319         HvCallPciConfigStore32, HvCallPciConfigStore32
 320 };
 321
 322 /*
 323  * Read PCI config space
 324  */
 325 static int iSeries_pci_read_config(struct pci_bus *bus, unsigned int devfn,
 326                 int offset, int size, u32 *val)
 327 {
 328         struct device_node *node = find_Device_Node(bus->number, devfn);
 329         u64 fn;
 330         struct HvCallPci_LoadReturn ret;
 331
 332         if (node == NULL)
 333                 return PCIBIOS_DEVICE_NOT_FOUND;
 334         if (offset > 255) {
 335                 *val = ~0;
 336                 return PCIBIOS_BAD_REGISTER_NUMBER;
 337         }
 338
 339         fn = hv_cfg_read_func[(size - 1) & 3];
 340         HvCall3Ret16(fn, &ret, iseries_ds_addr(node), offset, 0);
 341
 342         if (ret.rc != 0) {
 343                 *val = ~0;
 344                 return PCIBIOS_DEVICE_NOT_FOUND;        /* or something */
 345         }
 346
 347         *val = ret.value;
 348         return 0;
 349 }
 350
 351 /*
 352  * Write PCI config space
 353  */
 354
 355 static int iSeries_pci_write_config(struct pci_bus *bus, unsigned int devfn,
 356                 int offset, int size, u32 val)
 357 {
 358         struct device_node *node = find_Device_Node(bus->number, devfn);
 359         u64 fn;
 360         u64 ret;
 361
 362         if (node == NULL)
 363                 return PCIBIOS_DEVICE_NOT_FOUND;
 364         if (offset > 255)
 365                 return PCIBIOS_BAD_REGISTER_NUMBER;
 366
 367         fn = hv_cfg_write_func[(size - 1) & 3];
 368         ret = HvCall4(fn, iseries_ds_addr(node), offset, val, 0);
 369
 370         if (ret != 0)
 371                 return PCIBIOS_DEVICE_NOT_FOUND;
 372
 373         return 0;
 374 }
 375
 376 static struct pci_ops iSeries_pci_ops = {
 377         .read = iSeries_pci_read_config,
 378         .write = iSeries_pci_write_config
 379 };
 380
 381 /*
 382  * Check Return Code
 383  * -> On Failure, print and log information.
 384  *    Increment Retry Count, if exceeds max, panic partition.
 385  *
 386  * PCI: Device 23.90 ReadL I/O Error( 0): 0x1234
 387  * PCI: Device 23.90 ReadL Retry( 1)
 388  * PCI: Device 23.90 ReadL Retry Successful(1)
 389  */
 390 static int CheckReturnCode(char *TextHdr, struct device_node *DevNode,
 391                 int *retry, u64 ret)
 392 {
 393         if (ret != 0)  {
 394                 struct pci_dn *pdn = PCI_DN(DevNode);
 395
 396                 (*retry)++;
 397                 printk("PCI: %s: Device 0x%04X:%02X  I/O Error(%2d): 0x%04X\n",
 398                                 TextHdr, pdn->busno, pdn->devfn,
 399                                 *retry, (int)ret);
 400                 /*
 401                  * Bump the retry and check for retry count exceeded.
 402                  * If, Exceeded, panic the system.
 403                  */
 404                 if (((*retry) > Pci_Retry_Max) &&
 405                                 (Pci_Error_Flag > 0)) {
 406                         mf_display_src(0xB6000103);
 407                         panic_timeout = 0;
 408                         panic("PCI: Hardware I/O Error, SRC B6000103, "
 409                                         "Automatic Reboot Disabled.\n");
 410                 }
 411                 return -1;      /* Retry Try */
 412         }
 413         return 0;
 414 }
 415
 416 /*
 417  * Translate the I/O Address into a device node, bar, and bar offset.
 418  * Note: Make sure the passed variable end up on the stack to avoid
 419  * the exposure of being device global.
 420  */
 421 static inline struct device_node *xlate_iomm_address(
 422                 const volatile void __iomem *IoAddress,
 423                 u64 *dsaptr, u64 *BarOffsetPtr)
 424 {
 425         unsigned long OrigIoAddr;
 426         unsigned long BaseIoAddr;
 427         unsigned long TableIndex;
 428         struct device_node *DevNode;
 429
 430         OrigIoAddr = (unsigned long __force)IoAddress;
 431         if ((OrigIoAddr < BASE_IO_MEMORY) || (OrigIoAddr >= max_io_memory))
 432                 return NULL;
 433         BaseIoAddr = OrigIoAddr - BASE_IO_MEMORY;
 434         TableIndex = BaseIoAddr / IOMM_TABLE_ENTRY_SIZE;
 435         DevNode = iomm_table[TableIndex];
 436
 437         if (DevNode != NULL) {
 438                 int barnum = iobar_table[TableIndex];
 439                 *dsaptr = iseries_ds_addr(DevNode) | (barnum << 24);
 440                 *BarOffsetPtr = BaseIoAddr % IOMM_TABLE_ENTRY_SIZE;
 441         } else
 442                 panic("PCI: Invalid PCI IoAddress detected!\n");
 443         return DevNode;
 444 }
 445
 446 /*
 447  * Read MM I/O Instructions for the iSeries
 448  * On MM I/O error, all ones are returned and iSeries_pci_IoError is cal
 449  * else, data is returned in big Endian format.
 450  *
 451  * iSeries_Read_Byte = Read Byte  ( 8 bit)
 452  * iSeries_Read_Word = Read Word  (16 bit)
 453  * iSeries_Read_Long = Read Long  (32 bit)
 454  */
 455 static u8 iSeries_Read_Byte(const volatile void __iomem *IoAddress)
 456 {
 457         u64 BarOffset;
 458         u64 dsa;
 459         int retry = 0;
 460         struct HvCallPci_LoadReturn ret;
 461         struct device_node *DevNode =
 462                 xlate_iomm_address(IoAddress, &dsa, &BarOffset);
 463
 464         if (DevNode == NULL) {
 465                 static unsigned long last_jiffies;
 466                 static int num_printed;
 467
 468                 if ((jiffies - last_jiffies) > 60 * HZ) {
 469                         last_jiffies = jiffies;
 470                         num_printed = 0;
 471                 }
 472                 if (num_printed++ < 10)
 473                         printk(KERN_ERR "iSeries_Read_Byte: invalid access at IO address %p\n", IoAddress);
 474                 return 0xff;
 475         }
 476         do {
 477                 HvCall3Ret16(HvCallPciBarLoad8, &ret, dsa, BarOffset, 0);
 478         } while (CheckReturnCode("RDB", DevNode, &retry, ret.rc) != 0);
 479
 480         return (u8)ret.value;
 481 }
 482
 483 static u16 iSeries_Read_Word(const volatile void __iomem *IoAddress)
 484 {
 485         u64 BarOffset;
 486         u64 dsa;
 487         int retry = 0;
 488         struct HvCallPci_LoadReturn ret;
 489         struct device_node *DevNode =
 490                 xlate_iomm_address(IoAddress, &dsa, &BarOffset);
 491
 492         if (DevNode == NULL) {
 493                 static unsigned long last_jiffies;
 494                 static int num_printed;
 495
 496                 if ((jiffies - last_jiffies) > 60 * HZ) {
 497                         last_jiffies = jiffies;
 498                         num_printed = 0;
 499                 }
 500                 if (num_printed++ < 10)
 501                         printk(KERN_ERR "iSeries_Read_Word: invalid access at IO address %p\n", IoAddress);
 502                 return 0xffff;
 503         }
 504         do {
 505                 HvCall3Ret16(HvCallPciBarLoad16, &ret, dsa,
 506                                 BarOffset, 0);
 507         } while (CheckReturnCode("RDW", DevNode, &retry, ret.rc) != 0);
 508
 509         return swab16((u16)ret.value);
 510 }
 511
 512 static u32 iSeries_Read_Long(const volatile void __iomem *IoAddress)
 513 {
 514         u64 BarOffset;
 515         u64 dsa;
 516         int retry = 0;
 517         struct HvCallPci_LoadReturn ret;
 518         struct device_node *DevNode =
 519                 xlate_iomm_address(IoAddress, &dsa, &BarOffset);
 520
 521         if (DevNode == NULL) {
 522                 static unsigned long last_jiffies;
 523                 static int num_printed;
 524
 525                 if ((jiffies - last_jiffies) > 60 * HZ) {
 526                         last_jiffies = jiffies;
 527                         num_printed = 0;
 528                 }
 529                 if (num_printed++ < 10)
 530                         printk(KERN_ERR "iSeries_Read_Long: invalid access at IO address %p\n", IoAddress);
 531                 return 0xffffffff;
 532         }
 533         do {
 534                 HvCall3Ret16(HvCallPciBarLoad32, &ret, dsa,
 535                                 BarOffset, 0);
 536         } while (CheckReturnCode("RDL", DevNode, &retry, ret.rc) != 0);
 537
 538         return swab32((u32)ret.value);
 539 }
 540
 541 /*
 542  * Write MM I/O Instructions for the iSeries
 543  *
 544  * iSeries_Write_Byte = Write Byte (8 bit)
 545  * iSeries_Write_Word = Write Word(16 bit)
 546  * iSeries_Write_Long = Write Long(32 bit)
 547  */
 548 static void iSeries_Write_Byte(u8 data, volatile void __iomem *IoAddress)
 549 {
 550         u64 BarOffset;
 551         u64 dsa;
 552         int retry = 0;
 553         u64 rc;
 554         struct device_node *DevNode =
 555                 xlate_iomm_address(IoAddress, &dsa, &BarOffset);
 556
 557         if (DevNode == NULL) {
 558                 static unsigned long last_jiffies;
 559                 static int num_printed;
 560
 561                 if ((jiffies - last_jiffies) > 60 * HZ) {
 562                         last_jiffies = jiffies;
 563                         num_printed = 0;
 564                 }
 565                 if (num_printed++ < 10)
 566                         printk(KERN_ERR "iSeries_Write_Byte: invalid access at IO address %p\n", IoAddress);
 567                 return;
 568         }
 569         do {
 570                 rc = HvCall4(HvCallPciBarStore8, dsa, BarOffset, data, 0);
 571         } while (CheckReturnCode("WWB", DevNode, &retry, rc) != 0);
 572 }
 573
 574 static void iSeries_Write_Word(u16 data, volatile void __iomem *IoAddress)
 575 {
 576         u64 BarOffset;
 577         u64 dsa;
 578         int retry = 0;
 579         u64 rc;
 580         struct device_node *DevNode =
 581                 xlate_iomm_address(IoAddress, &dsa, &BarOffset);
 582
 583         if (DevNode == NULL) {
 584                 static unsigned long last_jiffies;
 585                 static int num_printed;
 586
 587                 if ((jiffies - last_jiffies) > 60 * HZ) {
 588                         last_jiffies = jiffies;
 589                         num_printed = 0;
 590                 }
 591                 if (num_printed++ < 10)
 592                         printk(KERN_ERR "iSeries_Write_Word: invalid access at IO address %p\n", IoAddress);
 593                 return;
 594         }
 595         do {
 596                 rc = HvCall4(HvCallPciBarStore16, dsa, BarOffset, swab16(data), 0);
 597         } while (CheckReturnCode("WWW", DevNode, &retry, rc) != 0);
 598 }
 599
 600 static void iSeries_Write_Long(u32 data, volatile void __iomem *IoAddress)
 601 {
 602         u64 BarOffset;
 603         u64 dsa;
 604         int retry = 0;
 605         u64 rc;
 606         struct device_node *DevNode =
 607                 xlate_iomm_address(IoAddress, &dsa, &BarOffset);
 608
 609         if (DevNode == NULL) {
 610                 static unsigned long last_jiffies;
 611                 static int num_printed;
 612
 613                 if ((jiffies - last_jiffies) > 60 * HZ) {
 614                         last_jiffies = jiffies;
 615                         num_printed = 0;
 616                 }
 617                 if (num_printed++ < 10)
 618                         printk(KERN_ERR "iSeries_Write_Long: invalid access at IO address %p\n", IoAddress);
 619                 return;
 620         }
 621         do {
 622                 rc = HvCall4(HvCallPciBarStore32, dsa, BarOffset, swab32(data), 0);
 623         } while (CheckReturnCode("WWL", DevNode, &retry, rc) != 0);
 624 }
 625
 626 extern unsigned char __raw_readb(const volatile void __iomem *addr)
 627 {
 628         BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
 629
 630         return *(volatile unsigned char __force *)addr;
 631 }
 632 EXPORT_SYMBOL(__raw_readb);
 633
 634 extern unsigned short __raw_readw(const volatile void __iomem *addr)
 635 {
 636         BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
 637
 638         return *(volatile unsigned short __force *)addr;
 639 }
 640 EXPORT_SYMBOL(__raw_readw);
 641
 642 extern unsigned int __raw_readl(const volatile void __iomem *addr)
 643 {
 644         BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
 645
 646         return *(volatile unsigned int __force *)addr;
 647 }
 648 EXPORT_SYMBOL(__raw_readl);
 649
 650 extern unsigned long __raw_readq(const volatile void __iomem *addr)
 651 {
 652         BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
 653
 654         return *(volatile unsigned long __force *)addr;
 655 }
 656 EXPORT_SYMBOL(__raw_readq);
 657
 658 extern void __raw_writeb(unsigned char v, volatile void __iomem *addr)
 659 {
 660         BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
 661
 662         *(volatile unsigned char __force *)addr = v;
 663 }
 664 EXPORT_SYMBOL(__raw_writeb);
 665
 666 extern void __raw_writew(unsigned short v, volatile void __iomem *addr)
 667 {
 668         BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
 669
 670         *(volatile unsigned short __force *)addr = v;
 671 }
 672 EXPORT_SYMBOL(__raw_writew);
 673
 674 extern void __raw_writel(unsigned int v, volatile void __iomem *addr)
 675 {
 676         BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
 677
 678         *(volatile unsigned int __force *)addr = v;
 679 }
 680 EXPORT_SYMBOL(__raw_writel);
 681
 682 extern void __raw_writeq(unsigned long v, volatile void __iomem *addr)
 683 {
 684         BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
 685
 686         *(volatile unsigned long __force *)addr = v;
 687 }
 688 EXPORT_SYMBOL(__raw_writeq);
 689
 690 int in_8(const volatile unsigned char __iomem *addr)
 691 {
 692         if (firmware_has_feature(FW_FEATURE_ISERIES))
 693                 return iSeries_Read_Byte(addr);
 694         return __in_8(addr);
 695 }
 696 EXPORT_SYMBOL(in_8);
 697
 698 void out_8(volatile unsigned char __iomem *addr, int val)
 699 {
 700         if (firmware_has_feature(FW_FEATURE_ISERIES))
 701                 iSeries_Write_Byte(val, addr);
 702         else
 703                 __out_8(addr, val);
 704 }
 705 EXPORT_SYMBOL(out_8);
 706
 707 int in_le16(const volatile unsigned short __iomem *addr)
 708 {
 709         if (firmware_has_feature(FW_FEATURE_ISERIES))
 710                 return iSeries_Read_Word(addr);
 711         return __in_le16(addr);
 712 }
 713 EXPORT_SYMBOL(in_le16);
 714
 715 int in_be16(const volatile unsigned short __iomem *addr)
 716 {
 717         BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
 718
 719         return __in_be16(addr);
 720 }
 721 EXPORT_SYMBOL(in_be16);
 722
 723 void out_le16(volatile unsigned short __iomem *addr, int val)
 724 {
 725         if (firmware_has_feature(FW_FEATURE_ISERIES))
 726                 iSeries_Write_Word(val, addr);
 727         else
 728                 __out_le16(addr, val);
 729 }
 730 EXPORT_SYMBOL(out_le16);
 731
 732 void out_be16(volatile unsigned short __iomem *addr, int val)
 733 {
 734         BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
 735
 736         __out_be16(addr, val);
 737 }
 738 EXPORT_SYMBOL(out_be16);
 739
 740 unsigned in_le32(const volatile unsigned __iomem *addr)
 741 {
 742         if (firmware_has_feature(FW_FEATURE_ISERIES))
 743                 return iSeries_Read_Long(addr);
 744         return __in_le32(addr);
 745 }
 746 EXPORT_SYMBOL(in_le32);
 747
 748 unsigned in_be32(const volatile unsigned __iomem *addr)
 749 {
 750         BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
 751
 752         return __in_be32(addr);
 753 }
 754 EXPORT_SYMBOL(in_be32);
 755
 756 void out_le32(volatile unsigned __iomem *addr, int val)
 757 {
 758         if (firmware_has_feature(FW_FEATURE_ISERIES))
 759                 iSeries_Write_Long(val, addr);
 760         else
 761                 __out_le32(addr, val);
 762 }
 763 EXPORT_SYMBOL(out_le32);
 764
 765 void out_be32(volatile unsigned __iomem *addr, int val)
 766 {
 767         BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
 768
 769         __out_be32(addr, val);
 770 }
 771 EXPORT_SYMBOL(out_be32);
 772
 773 unsigned long in_le64(const volatile unsigned long __iomem *addr)
 774 {
 775         BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
 776
 777         return __in_le64(addr);
 778 }
 779 EXPORT_SYMBOL(in_le64);
 780
 781 unsigned long in_be64(const volatile unsigned long __iomem *addr)
 782 {
 783         BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
 784
 785         return __in_be64(addr);
 786 }
 787 EXPORT_SYMBOL(in_be64);
 788
 789 void out_le64(volatile unsigned long __iomem *addr, unsigned long val)
 790 {
 791         BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
 792
 793         __out_le64(addr, val);
 794 }
 795 EXPORT_SYMBOL(out_le64);
 796
 797 void out_be64(volatile unsigned long __iomem *addr, unsigned long val)
 798 {
 799         BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
 800
 801         __out_be64(addr, val);
 802 }
 803 EXPORT_SYMBOL(out_be64);
 804
 805 void memset_io(volatile void __iomem *addr, int c, unsigned long n)
 806 {
 807         if (firmware_has_feature(FW_FEATURE_ISERIES)) {
 808                 volatile char __iomem *d = addr;
 809
 810                 while (n-- > 0) {
 811                         iSeries_Write_Byte(c, d++);
 812                 }
 813         } else
 814                 eeh_memset_io(addr, c, n);
 815 }
 816 EXPORT_SYMBOL(memset_io);
 817
 818 void memcpy_fromio(void *dest, const volatile void __iomem *src,
 819                                  unsigned long n)
 820 {
 821         if (firmware_has_feature(FW_FEATURE_ISERIES)) {
 822                 char *d = dest;
 823                 const volatile char __iomem *s = src;
 824
 825                 while (n-- > 0) {
 826                         *d++ = iSeries_Read_Byte(s++);
 827                 }
 828         } else
 829                 eeh_memcpy_fromio(dest, src, n);
 830 }
 831 EXPORT_SYMBOL(memcpy_fromio);
 832
 833 void memcpy_toio(volatile void __iomem *dest, const void *src, unsigned long n)
 834 {
 835         if (firmware_has_feature(FW_FEATURE_ISERIES)) {
 836                 const char *s = src;
 837                 volatile char __iomem *d = dest;
 838
 839                 while (n-- > 0) {
 840                         iSeries_Write_Byte(*s++, d++);
 841                 }
 842         } else
 843                 eeh_memcpy_toio(dest, src, n);
 844 }
 845 EXPORT_SYMBOL(memcpy_toio);