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 /*
 266  * Look down the chain to find the matching Device Device
 267  */
 268 static struct device_node *find_Device_Node(int bus, int devfn)
 269 {
 270         struct device_node *node;
 271
 272         for (node = NULL; (node = of_find_all_nodes(node)); ) {
 273                 struct pci_dn *pdn = PCI_DN(node);
 274
 275                 if (pdn && (bus == pdn->busno) && (devfn == pdn->devfn))
 276                         return node;
 277         }
 278         return NULL;
 279 }
 280
 281 #if 0
 282 /*
 283  * Returns the device node for the passed pci_dev
 284  * Sanity Check Node PciDev to passed pci_dev
 285  * If none is found, returns a NULL which the client must handle.
 286  */
 287 static struct device_node *get_Device_Node(struct pci_dev *pdev)
 288 {
 289         struct device_node *node;
 290
 291         node = pdev->sysdata;
 292         if (node == NULL || PCI_DN(node)->pcidev != pdev)
 293                 node = find_Device_Node(pdev->bus->number, pdev->devfn);
 294         return node;
 295 }
 296 #endif
 297
 298 /*
 299  * Config space read and write functions.
 300  * For now at least, we look for the device node for the bus and devfn
 301  * that we are asked to access.  It may be possible to translate the devfn
 302  * to a subbus and deviceid more directly.
 303  */
 304 static u64 hv_cfg_read_func[4]  = {
 305         HvCallPciConfigLoad8, HvCallPciConfigLoad16,
 306         HvCallPciConfigLoad32, HvCallPciConfigLoad32
 307 };
 308
 309 static u64 hv_cfg_write_func[4] = {
 310         HvCallPciConfigStore8, HvCallPciConfigStore16,
 311         HvCallPciConfigStore32, HvCallPciConfigStore32
 312 };
 313
 314 /*
 315  * Read PCI config space
 316  */
 317 static int iSeries_pci_read_config(struct pci_bus *bus, unsigned int devfn,
 318                 int offset, int size, u32 *val)
 319 {
 320         struct device_node *node = find_Device_Node(bus->number, devfn);
 321         u64 fn;
 322         struct HvCallPci_LoadReturn ret;
 323
 324         if (node == NULL)
 325                 return PCIBIOS_DEVICE_NOT_FOUND;
 326         if (offset > 255) {
 327                 *val = ~0;
 328                 return PCIBIOS_BAD_REGISTER_NUMBER;
 329         }
 330
 331         fn = hv_cfg_read_func[(size - 1) & 3];
 332         HvCall3Ret16(fn, &ret, iseries_ds_addr(node), offset, 0);
 333
 334         if (ret.rc != 0) {
 335                 *val = ~0;
 336                 return PCIBIOS_DEVICE_NOT_FOUND;        /* or something */
 337         }
 338
 339         *val = ret.value;
 340         return 0;
 341 }
 342
 343 /*
 344  * Write PCI config space
 345  */
 346
 347 static int iSeries_pci_write_config(struct pci_bus *bus, unsigned int devfn,
 348                 int offset, int size, u32 val)
 349 {
 350         struct device_node *node = find_Device_Node(bus->number, devfn);
 351         u64 fn;
 352         u64 ret;
 353
 354         if (node == NULL)
 355                 return PCIBIOS_DEVICE_NOT_FOUND;
 356         if (offset > 255)
 357                 return PCIBIOS_BAD_REGISTER_NUMBER;
 358
 359         fn = hv_cfg_write_func[(size - 1) & 3];
 360         ret = HvCall4(fn, iseries_ds_addr(node), offset, val, 0);
 361
 362         if (ret != 0)
 363                 return PCIBIOS_DEVICE_NOT_FOUND;
 364
 365         return 0;
 366 }
 367
 368 static struct pci_ops iSeries_pci_ops = {
 369         .read = iSeries_pci_read_config,
 370         .write = iSeries_pci_write_config
 371 };
 372
 373 /*
 374  * Check Return Code
 375  * -> On Failure, print and log information.
 376  *    Increment Retry Count, if exceeds max, panic partition.
 377  *
 378  * PCI: Device 23.90 ReadL I/O Error( 0): 0x1234
 379  * PCI: Device 23.90 ReadL Retry( 1)
 380  * PCI: Device 23.90 ReadL Retry Successful(1)
 381  */
 382 static int CheckReturnCode(char *TextHdr, struct device_node *DevNode,
 383                 int *retry, u64 ret)
 384 {
 385         if (ret != 0)  {
 386                 struct pci_dn *pdn = PCI_DN(DevNode);
 387
 388                 (*retry)++;
 389                 printk("PCI: %s: Device 0x%04X:%02X  I/O Error(%2d): 0x%04X\n",
 390                                 TextHdr, pdn->busno, pdn->devfn,
 391                                 *retry, (int)ret);
 392                 /*
 393                  * Bump the retry and check for retry count exceeded.
 394                  * If, Exceeded, panic the system.
 395                  */
 396                 if (((*retry) > Pci_Retry_Max) &&
 397                                 (Pci_Error_Flag > 0)) {
 398                         mf_display_src(0xB6000103);
 399                         panic_timeout = 0;
 400                         panic("PCI: Hardware I/O Error, SRC B6000103, "
 401                                         "Automatic Reboot Disabled.\n");
 402                 }
 403                 return -1;      /* Retry Try */
 404         }
 405         return 0;
 406 }
 407
 408 /*
 409  * Translate the I/O Address into a device node, bar, and bar offset.
 410  * Note: Make sure the passed variable end up on the stack to avoid
 411  * the exposure of being device global.
 412  */
 413 static inline struct device_node *xlate_iomm_address(
 414                 const volatile void __iomem *IoAddress,
 415                 u64 *dsaptr, u64 *BarOffsetPtr)
 416 {
 417         unsigned long OrigIoAddr;
 418         unsigned long BaseIoAddr;
 419         unsigned long TableIndex;
 420         struct device_node *DevNode;
 421
 422         OrigIoAddr = (unsigned long __force)IoAddress;
 423         if ((OrigIoAddr < BASE_IO_MEMORY) || (OrigIoAddr >= max_io_memory))
 424                 return NULL;
 425         BaseIoAddr = OrigIoAddr - BASE_IO_MEMORY;
 426         TableIndex = BaseIoAddr / IOMM_TABLE_ENTRY_SIZE;
 427         DevNode = iomm_table[TableIndex];
 428
 429         if (DevNode != NULL) {
 430                 int barnum = iobar_table[TableIndex];
 431                 *dsaptr = iseries_ds_addr(DevNode) | (barnum << 24);
 432                 *BarOffsetPtr = BaseIoAddr % IOMM_TABLE_ENTRY_SIZE;
 433         } else
 434                 panic("PCI: Invalid PCI IoAddress detected!\n");
 435         return DevNode;
 436 }
 437
 438 /*
 439  * Read MM I/O Instructions for the iSeries
 440  * On MM I/O error, all ones are returned and iSeries_pci_IoError is cal
 441  * else, data is returned in big Endian format.
 442  *
 443  * iSeries_Read_Byte = Read Byte  ( 8 bit)
 444  * iSeries_Read_Word = Read Word  (16 bit)
 445  * iSeries_Read_Long = Read Long  (32 bit)
 446  */
 447 static u8 iSeries_Read_Byte(const volatile void __iomem *IoAddress)
 448 {
 449         u64 BarOffset;
 450         u64 dsa;
 451         int retry = 0;
 452         struct HvCallPci_LoadReturn ret;
 453         struct device_node *DevNode =
 454                 xlate_iomm_address(IoAddress, &dsa, &BarOffset);
 455
 456         if (DevNode == NULL) {
 457                 static unsigned long last_jiffies;
 458                 static int num_printed;
 459
 460                 if ((jiffies - last_jiffies) > 60 * HZ) {
 461                         last_jiffies = jiffies;
 462                         num_printed = 0;
 463                 }
 464                 if (num_printed++ < 10)
 465                         printk(KERN_ERR "iSeries_Read_Byte: invalid access at IO address %p\n", IoAddress);
 466                 return 0xff;
 467         }
 468         do {
 469                 HvCall3Ret16(HvCallPciBarLoad8, &ret, dsa, BarOffset, 0);
 470         } while (CheckReturnCode("RDB", DevNode, &retry, ret.rc) != 0);
 471
 472         return (u8)ret.value;
 473 }
 474
 475 static u16 iSeries_Read_Word(const volatile void __iomem *IoAddress)
 476 {
 477         u64 BarOffset;
 478         u64 dsa;
 479         int retry = 0;
 480         struct HvCallPci_LoadReturn ret;
 481         struct device_node *DevNode =
 482                 xlate_iomm_address(IoAddress, &dsa, &BarOffset);
 483
 484         if (DevNode == NULL) {
 485                 static unsigned long last_jiffies;
 486                 static int num_printed;
 487
 488                 if ((jiffies - last_jiffies) > 60 * HZ) {
 489                         last_jiffies = jiffies;
 490                         num_printed = 0;
 491                 }
 492                 if (num_printed++ < 10)
 493                         printk(KERN_ERR "iSeries_Read_Word: invalid access at IO address %p\n", IoAddress);
 494                 return 0xffff;
 495         }
 496         do {
 497                 HvCall3Ret16(HvCallPciBarLoad16, &ret, dsa,
 498                                 BarOffset, 0);
 499         } while (CheckReturnCode("RDW", DevNode, &retry, ret.rc) != 0);
 500
 501         return swab16((u16)ret.value);
 502 }
 503
 504 static u32 iSeries_Read_Long(const volatile void __iomem *IoAddress)
 505 {
 506         u64 BarOffset;
 507         u64 dsa;
 508         int retry = 0;
 509         struct HvCallPci_LoadReturn ret;
 510         struct device_node *DevNode =
 511                 xlate_iomm_address(IoAddress, &dsa, &BarOffset);
 512
 513         if (DevNode == NULL) {
 514                 static unsigned long last_jiffies;
 515                 static int num_printed;
 516
 517                 if ((jiffies - last_jiffies) > 60 * HZ) {
 518                         last_jiffies = jiffies;
 519                         num_printed = 0;
 520                 }
 521                 if (num_printed++ < 10)
 522                         printk(KERN_ERR "iSeries_Read_Long: invalid access at IO address %p\n", IoAddress);
 523                 return 0xffffffff;
 524         }
 525         do {
 526                 HvCall3Ret16(HvCallPciBarLoad32, &ret, dsa,
 527                                 BarOffset, 0);
 528         } while (CheckReturnCode("RDL", DevNode, &retry, ret.rc) != 0);
 529
 530         return swab32((u32)ret.value);
 531 }
 532
 533 /*
 534  * Write MM I/O Instructions for the iSeries
 535  *
 536  * iSeries_Write_Byte = Write Byte (8 bit)
 537  * iSeries_Write_Word = Write Word(16 bit)
 538  * iSeries_Write_Long = Write Long(32 bit)
 539  */
 540 static void iSeries_Write_Byte(u8 data, volatile void __iomem *IoAddress)
 541 {
 542         u64 BarOffset;
 543         u64 dsa;
 544         int retry = 0;
 545         u64 rc;
 546         struct device_node *DevNode =
 547                 xlate_iomm_address(IoAddress, &dsa, &BarOffset);
 548
 549         if (DevNode == NULL) {
 550                 static unsigned long last_jiffies;
 551                 static int num_printed;
 552
 553                 if ((jiffies - last_jiffies) > 60 * HZ) {
 554                         last_jiffies = jiffies;
 555                         num_printed = 0;
 556                 }
 557                 if (num_printed++ < 10)
 558                         printk(KERN_ERR "iSeries_Write_Byte: invalid access at IO address %p\n", IoAddress);
 559                 return;
 560         }
 561         do {
 562                 rc = HvCall4(HvCallPciBarStore8, dsa, BarOffset, data, 0);
 563         } while (CheckReturnCode("WWB", DevNode, &retry, rc) != 0);
 564 }
 565
 566 static void iSeries_Write_Word(u16 data, volatile void __iomem *IoAddress)
 567 {
 568         u64 BarOffset;
 569         u64 dsa;
 570         int retry = 0;
 571         u64 rc;
 572         struct device_node *DevNode =
 573                 xlate_iomm_address(IoAddress, &dsa, &BarOffset);
 574
 575         if (DevNode == NULL) {
 576                 static unsigned long last_jiffies;
 577                 static int num_printed;
 578
 579                 if ((jiffies - last_jiffies) > 60 * HZ) {
 580                         last_jiffies = jiffies;
 581                         num_printed = 0;
 582                 }
 583                 if (num_printed++ < 10)
 584                         printk(KERN_ERR "iSeries_Write_Word: invalid access at IO address %p\n", IoAddress);
 585                 return;
 586         }
 587         do {
 588                 rc = HvCall4(HvCallPciBarStore16, dsa, BarOffset, swab16(data), 0);
 589         } while (CheckReturnCode("WWW", DevNode, &retry, rc) != 0);
 590 }
 591
 592 static void iSeries_Write_Long(u32 data, volatile void __iomem *IoAddress)
 593 {
 594         u64 BarOffset;
 595         u64 dsa;
 596         int retry = 0;
 597         u64 rc;
 598         struct device_node *DevNode =
 599                 xlate_iomm_address(IoAddress, &dsa, &BarOffset);
 600
 601         if (DevNode == NULL) {
 602                 static unsigned long last_jiffies;
 603                 static int num_printed;
 604
 605                 if ((jiffies - last_jiffies) > 60 * HZ) {
 606                         last_jiffies = jiffies;
 607                         num_printed = 0;
 608                 }
 609                 if (num_printed++ < 10)
 610                         printk(KERN_ERR "iSeries_Write_Long: invalid access at IO address %p\n", IoAddress);
 611                 return;
 612         }
 613         do {
 614                 rc = HvCall4(HvCallPciBarStore32, dsa, BarOffset, swab32(data), 0);
 615         } while (CheckReturnCode("WWL", DevNode, &retry, rc) != 0);
 616 }
 617
 618 extern unsigned char __raw_readb(const volatile void __iomem *addr)
 619 {
 620         BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
 621
 622         return *(volatile unsigned char __force *)addr;
 623 }
 624 EXPORT_SYMBOL(__raw_readb);
 625
 626 extern unsigned short __raw_readw(const volatile void __iomem *addr)
 627 {
 628         BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
 629
 630         return *(volatile unsigned short __force *)addr;
 631 }
 632 EXPORT_SYMBOL(__raw_readw);
 633
 634 extern unsigned int __raw_readl(const volatile void __iomem *addr)
 635 {
 636         BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
 637
 638         return *(volatile unsigned int __force *)addr;
 639 }
 640 EXPORT_SYMBOL(__raw_readl);
 641
 642 extern unsigned long __raw_readq(const volatile void __iomem *addr)
 643 {
 644         BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
 645
 646         return *(volatile unsigned long __force *)addr;
 647 }
 648 EXPORT_SYMBOL(__raw_readq);
 649
 650 extern void __raw_writeb(unsigned char v, volatile void __iomem *addr)
 651 {
 652         BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
 653
 654         *(volatile unsigned char __force *)addr = v;
 655 }
 656 EXPORT_SYMBOL(__raw_writeb);
 657
 658 extern void __raw_writew(unsigned short v, volatile void __iomem *addr)
 659 {
 660         BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
 661
 662         *(volatile unsigned short __force *)addr = v;
 663 }
 664 EXPORT_SYMBOL(__raw_writew);
 665
 666 extern void __raw_writel(unsigned int v, volatile void __iomem *addr)
 667 {
 668         BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
 669
 670         *(volatile unsigned int __force *)addr = v;
 671 }
 672 EXPORT_SYMBOL(__raw_writel);
 673
 674 extern void __raw_writeq(unsigned long v, volatile void __iomem *addr)
 675 {
 676         BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
 677
 678         *(volatile unsigned long __force *)addr = v;
 679 }
 680 EXPORT_SYMBOL(__raw_writeq);
 681
 682 int in_8(const volatile unsigned char __iomem *addr)
 683 {
 684         if (firmware_has_feature(FW_FEATURE_ISERIES))
 685                 return iSeries_Read_Byte(addr);
 686         return __in_8(addr);
 687 }
 688 EXPORT_SYMBOL(in_8);
 689
 690 void out_8(volatile unsigned char __iomem *addr, int val)
 691 {
 692         if (firmware_has_feature(FW_FEATURE_ISERIES))
 693                 iSeries_Write_Byte(val, addr);
 694         else
 695                 __out_8(addr, val);
 696 }
 697 EXPORT_SYMBOL(out_8);
 698
 699 int in_le16(const volatile unsigned short __iomem *addr)
 700 {
 701         if (firmware_has_feature(FW_FEATURE_ISERIES))
 702                 return iSeries_Read_Word(addr);
 703         return __in_le16(addr);
 704 }
 705 EXPORT_SYMBOL(in_le16);
 706
 707 int in_be16(const volatile unsigned short __iomem *addr)
 708 {
 709         BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
 710
 711         return __in_be16(addr);
 712 }
 713 EXPORT_SYMBOL(in_be16);
 714
 715 void out_le16(volatile unsigned short __iomem *addr, int val)
 716 {
 717         if (firmware_has_feature(FW_FEATURE_ISERIES))
 718                 iSeries_Write_Word(val, addr);
 719         else
 720                 __out_le16(addr, val);
 721 }
 722 EXPORT_SYMBOL(out_le16);
 723
 724 void out_be16(volatile unsigned short __iomem *addr, int val)
 725 {
 726         BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
 727
 728         __out_be16(addr, val);
 729 }
 730 EXPORT_SYMBOL(out_be16);
 731
 732 unsigned in_le32(const volatile unsigned __iomem *addr)
 733 {
 734         if (firmware_has_feature(FW_FEATURE_ISERIES))
 735                 return iSeries_Read_Long(addr);
 736         return __in_le32(addr);
 737 }
 738 EXPORT_SYMBOL(in_le32);
 739
 740 unsigned in_be32(const volatile unsigned __iomem *addr)
 741 {
 742         BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
 743
 744         return __in_be32(addr);
 745 }
 746 EXPORT_SYMBOL(in_be32);
 747
 748 void out_le32(volatile unsigned __iomem *addr, int val)
 749 {
 750         if (firmware_has_feature(FW_FEATURE_ISERIES))
 751                 iSeries_Write_Long(val, addr);
 752         else
 753                 __out_le32(addr, val);
 754 }
 755 EXPORT_SYMBOL(out_le32);
 756
 757 void out_be32(volatile unsigned __iomem *addr, int val)
 758 {
 759         BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
 760
 761         __out_be32(addr, val);
 762 }
 763 EXPORT_SYMBOL(out_be32);
 764
 765 unsigned long in_le64(const volatile unsigned long __iomem *addr)
 766 {
 767         BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
 768
 769         return __in_le64(addr);
 770 }
 771 EXPORT_SYMBOL(in_le64);
 772
 773 unsigned long in_be64(const volatile unsigned long __iomem *addr)
 774 {
 775         BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
 776
 777         return __in_be64(addr);
 778 }
 779 EXPORT_SYMBOL(in_be64);
 780
 781 void out_le64(volatile unsigned long __iomem *addr, unsigned long val)
 782 {
 783         BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
 784
 785         __out_le64(addr, val);
 786 }
 787 EXPORT_SYMBOL(out_le64);
 788
 789 void out_be64(volatile unsigned long __iomem *addr, unsigned long val)
 790 {
 791         BUG_ON(firmware_has_feature(FW_FEATURE_ISERIES));
 792
 793         __out_be64(addr, val);
 794 }
 795 EXPORT_SYMBOL(out_be64);
 796
 797 void memset_io(volatile void __iomem *addr, int c, unsigned long n)
 798 {
 799         if (firmware_has_feature(FW_FEATURE_ISERIES)) {
 800                 volatile char __iomem *d = addr;
 801
 802                 while (n-- > 0) {
 803                         iSeries_Write_Byte(c, d++);
 804                 }
 805         } else
 806                 eeh_memset_io(addr, c, n);
 807 }
 808 EXPORT_SYMBOL(memset_io);
 809
 810 void memcpy_fromio(void *dest, const volatile void __iomem *src,
 811                                  unsigned long n)
 812 {
 813         if (firmware_has_feature(FW_FEATURE_ISERIES)) {
 814                 char *d = dest;
 815                 const volatile char __iomem *s = src;
 816
 817                 while (n-- > 0) {
 818                         *d++ = iSeries_Read_Byte(s++);
 819                 }
 820         } else
 821                 eeh_memcpy_fromio(dest, src, n);
 822 }
 823 EXPORT_SYMBOL(memcpy_fromio);
 824
 825 void memcpy_toio(volatile void __iomem *dest, const void *src, unsigned long n)
 826 {
 827         if (firmware_has_feature(FW_FEATURE_ISERIES)) {
 828                 const char *s = src;
 829                 volatile char __iomem *d = dest;
 830
 831                 while (n-- > 0) {
 832                         iSeries_Write_Byte(*s++, d++);
 833                 }
 834         } else
 835                 eeh_memcpy_toio(dest, src, n);
 836 }
 837 EXPORT_SYMBOL(memcpy_toio);