2 * Copyright (C) 2001 Allan Trautman, IBM Corporation
4 * iSeries specific routines for PCI.
6 * Based on code from pci.c and iSeries_pci.c 32bit
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.
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.
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
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>
33 #include <asm/machdep.h>
34 #include <asm/pci-bridge.h>
35 #include <asm/iommu.h>
36 #include <asm/abs_addr.h>
38 #include <asm/iseries/hv_call_xm.h>
39 #include <asm/iseries/mf.h>
40 #include <asm/iseries/iommu.h>
42 #include <asm/ppc-pci.h>
49 * Forward declares of prototypes.
51 static struct device_node *find_Device_Node(int bus, int devfn);
52 static void scan_PHB_slots(struct pci_controller *Phb);
53 static void scan_EADS_bridge(HvBusNumber Bus, HvSubBusNumber SubBus, int IdSel);
54 static int scan_bridge_slot(HvBusNumber Bus, struct HvCallPci_BridgeInfo *Info);
56 LIST_HEAD(iSeries_Global_Device_List);
58 static int DeviceCount;
60 /* Counters and control flags. */
61 static long Pci_Io_Read_Count;
62 static long Pci_Io_Write_Count;
64 static long Pci_Cfg_Read_Count;
65 static long Pci_Cfg_Write_Count;
67 static long Pci_Error_Count;
69 static int Pci_Retry_Max = 3; /* Only retry 3 times */
70 static int Pci_Error_Flag = 1; /* Set Retry Error on. */
72 static struct pci_ops iSeries_pci_ops;
76 * Each Entry size is 4 MB * 1024 Entries = 4GB I/O address space.
78 #define IOMM_TABLE_MAX_ENTRIES 1024
79 #define IOMM_TABLE_ENTRY_SIZE 0x0000000000400000UL
80 #define BASE_IO_MEMORY 0xE000000000000000UL
82 static unsigned long max_io_memory = 0xE000000000000000UL;
83 static long current_iomm_table_entry;
88 static struct device_node **iomm_table;
89 static u8 *iobar_table;
92 * Static and Global variables
94 static char *pci_io_text = "iSeries PCI I/O";
95 static DEFINE_SPINLOCK(iomm_table_lock);
98 * iomm_table_initialize
100 * Allocates and initalizes the Address Translation Table and Bar
101 * Tables to get them ready for use. Must be called before any
102 * I/O space is handed out to the device BARs.
104 static void iomm_table_initialize(void)
106 spin_lock(&iomm_table_lock);
107 iomm_table = kmalloc(sizeof(*iomm_table) * IOMM_TABLE_MAX_ENTRIES,
109 iobar_table = kmalloc(sizeof(*iobar_table) * IOMM_TABLE_MAX_ENTRIES,
111 spin_unlock(&iomm_table_lock);
112 if ((iomm_table == NULL) || (iobar_table == NULL))
113 panic("PCI: I/O tables allocation failed.\n");
117 * iomm_table_allocate_entry
119 * Adds pci_dev entry in address translation table
121 * - Allocates the number of entries required in table base on BAR
123 * - Allocates starting at BASE_IO_MEMORY and increases.
124 * - The size is round up to be a multiple of entry size.
125 * - CurrentIndex is incremented to keep track of the last entry.
126 * - Builds the resource entry for allocated BARs.
128 static void iomm_table_allocate_entry(struct pci_dev *dev, int bar_num)
130 struct resource *bar_res = &dev->resource[bar_num];
131 long bar_size = pci_resource_len(dev, bar_num);
134 * No space to allocate, quick exit, skip Allocation.
139 * Set Resource values.
141 spin_lock(&iomm_table_lock);
142 bar_res->name = pci_io_text;
144 IOMM_TABLE_ENTRY_SIZE * current_iomm_table_entry;
145 bar_res->start += BASE_IO_MEMORY;
146 bar_res->end = bar_res->start + bar_size - 1;
148 * Allocate the number of table entries needed for BAR.
150 while (bar_size > 0 ) {
151 iomm_table[current_iomm_table_entry] = dev->sysdata;
152 iobar_table[current_iomm_table_entry] = bar_num;
153 bar_size -= IOMM_TABLE_ENTRY_SIZE;
154 ++current_iomm_table_entry;
156 max_io_memory = BASE_IO_MEMORY +
157 (IOMM_TABLE_ENTRY_SIZE * current_iomm_table_entry);
158 spin_unlock(&iomm_table_lock);
162 * allocate_device_bars
164 * - Allocates ALL pci_dev BAR's and updates the resources with the
165 * BAR value. BARS with zero length will have the resources
166 * The HvCallPci_getBarParms is used to get the size of the BAR
167 * space. It calls iomm_table_allocate_entry to allocate
169 * - Loops through The Bar resources(0 - 5) including the ROM
172 static void allocate_device_bars(struct pci_dev *dev)
174 struct resource *bar_res;
177 for (bar_num = 0; bar_num <= PCI_ROM_RESOURCE; ++bar_num) {
178 bar_res = &dev->resource[bar_num];
179 iomm_table_allocate_entry(dev, bar_num);
184 * Log error information to system console.
185 * Filter out the device not there errors.
186 * PCI: EADs Connect Failed 0x18.58.10 Rc: 0x00xx
187 * PCI: Read Vendor Failed 0x18.58.10 Rc: 0x00xx
188 * PCI: Connect Bus Unit Failed 0x18.58.10 Rc: 0x00xx
190 static void pci_Log_Error(char *Error_Text, int Bus, int SubBus,
191 int AgentId, int HvRc)
195 printk(KERN_ERR "PCI: %s Failed: 0x%02X.%02X.%02X Rc: 0x%04X",
196 Error_Text, Bus, SubBus, AgentId, HvRc);
200 * build_device_node(u16 Bus, int SubBus, u8 DevFn)
202 static struct device_node *build_device_node(HvBusNumber Bus,
203 HvSubBusNumber SubBus, int AgentId, int Function)
205 struct device_node *node;
208 node = kmalloc(sizeof(struct device_node), GFP_KERNEL);
211 memset(node, 0, sizeof(struct device_node));
212 pdn = kzalloc(sizeof(*pdn), GFP_KERNEL);
219 list_add_tail(&pdn->Device_List, &iSeries_Global_Device_List);
221 pdn->bussubno = SubBus;
222 pdn->devfn = PCI_DEVFN(ISERIES_ENCODE_DEVICE(AgentId), Function);
227 * unsigned long __init find_and_init_phbs(void)
230 * This function checks for all possible system PCI host bridges that connect
231 * PCI buses. The system hypervisor is queried as to the guest partition
232 * ownership status. A pci_controller is built for any bus which is partially
233 * owned or fully owned by this guest partition.
235 unsigned long __init find_and_init_phbs(void)
237 struct pci_controller *phb;
240 /* Check all possible buses. */
241 for (bus = 0; bus < 256; bus++) {
242 int ret = HvCallXm_testBus(bus);
244 printk("bus %d appears to exist\n", bus);
246 phb = pcibios_alloc_controller(NULL);
250 phb->pci_mem_offset = phb->local_number = bus;
251 phb->first_busno = bus;
252 phb->last_busno = bus;
253 phb->ops = &iSeries_pci_ops;
255 /* Find and connect the devices. */
259 * Check for Unexpected Return code, a clue that something
262 else if (ret != 0x0301)
263 printk(KERN_ERR "Unexpected Return on Probe(0x%04X): 0x%04X",
270 * iSeries_pcibios_init
272 * Chance to initialize and structures or variable before PCI Bus walk.
274 void iSeries_pcibios_init(void)
276 iomm_table_initialize();
277 find_and_init_phbs();
281 * iSeries_pci_final_fixup(void)
283 void __init iSeries_pci_final_fixup(void)
285 struct pci_dev *pdev = NULL;
286 struct device_node *node;
289 /* Fix up at the device node and pci_dev relationship */
290 mf_display_src(0xC9000100);
292 printk("pcibios_final_fixup\n");
293 for_each_pci_dev(pdev) {
294 node = find_Device_Node(pdev->bus->number, pdev->devfn);
295 printk("pci dev %p (%x.%x), node %p\n", pdev,
296 pdev->bus->number, pdev->devfn, node);
300 pdev->sysdata = (void *)node;
301 PCI_DN(node)->pcidev = pdev;
302 allocate_device_bars(pdev);
303 iSeries_Device_Information(pdev, DeviceCount);
304 iommu_devnode_init_iSeries(node);
306 printk("PCI: Device Tree not found for 0x%016lX\n",
307 (unsigned long)pdev);
308 pdev->irq = PCI_DN(node)->Irq;
310 iSeries_activate_IRQs();
311 mf_display_src(0xC9000200);
314 void pcibios_fixup_bus(struct pci_bus *PciBus)
318 void pcibios_fixup_resources(struct pci_dev *pdev)
323 * Loop through each node function to find usable EADs bridges.
325 static void scan_PHB_slots(struct pci_controller *Phb)
327 struct HvCallPci_DeviceInfo *DevInfo;
328 HvBusNumber bus = Phb->local_number; /* System Bus */
329 const HvSubBusNumber SubBus = 0; /* EADs is always 0. */
332 const int MaxAgents = 8;
334 DevInfo = (struct HvCallPci_DeviceInfo*)
335 kmalloc(sizeof(struct HvCallPci_DeviceInfo), GFP_KERNEL);
340 * Probe for EADs Bridges
342 for (IdSel = 1; IdSel < MaxAgents; ++IdSel) {
343 HvRc = HvCallPci_getDeviceInfo(bus, SubBus, IdSel,
344 iseries_hv_addr(DevInfo),
345 sizeof(struct HvCallPci_DeviceInfo));
347 if (DevInfo->deviceType == HvCallPci_NodeDevice)
348 scan_EADS_bridge(bus, SubBus, IdSel);
350 printk("PCI: Invalid System Configuration(0x%02X)"
351 " for bus 0x%02x id 0x%02x.\n",
352 DevInfo->deviceType, bus, IdSel);
355 pci_Log_Error("getDeviceInfo", bus, SubBus, IdSel, HvRc);
360 static void scan_EADS_bridge(HvBusNumber bus, HvSubBusNumber SubBus,
363 struct HvCallPci_BridgeInfo *BridgeInfo;
368 BridgeInfo = (struct HvCallPci_BridgeInfo *)
369 kmalloc(sizeof(struct HvCallPci_BridgeInfo), GFP_KERNEL);
370 if (BridgeInfo == NULL)
373 /* Note: hvSubBus and irq is always be 0 at this level! */
374 for (Function = 0; Function < 8; ++Function) {
375 AgentId = ISERIES_PCI_AGENTID(IdSel, Function);
376 HvRc = HvCallXm_connectBusUnit(bus, SubBus, AgentId, 0);
378 printk("found device at bus %d idsel %d func %d (AgentId %x)\n",
379 bus, IdSel, Function, AgentId);
380 /* Connect EADs: 0x18.00.12 = 0x00 */
381 HvRc = HvCallPci_getBusUnitInfo(bus, SubBus, AgentId,
382 iseries_hv_addr(BridgeInfo),
383 sizeof(struct HvCallPci_BridgeInfo));
385 printk("bridge info: type %x subbus %x maxAgents %x maxsubbus %x logslot %x\n",
386 BridgeInfo->busUnitInfo.deviceType,
387 BridgeInfo->subBusNumber,
388 BridgeInfo->maxAgents,
389 BridgeInfo->maxSubBusNumber,
390 BridgeInfo->logicalSlotNumber);
391 if (BridgeInfo->busUnitInfo.deviceType ==
392 HvCallPci_BridgeDevice) {
393 /* Scan_Bridge_Slot...: 0x18.00.12 */
394 scan_bridge_slot(bus, BridgeInfo);
396 printk("PCI: Invalid Bridge Configuration(0x%02X)",
397 BridgeInfo->busUnitInfo.deviceType);
399 } else if (HvRc != 0x000B)
400 pci_Log_Error("EADs Connect",
401 bus, SubBus, AgentId, HvRc);
407 * This assumes that the node slot is always on the primary bus!
409 static int scan_bridge_slot(HvBusNumber Bus,
410 struct HvCallPci_BridgeInfo *BridgeInfo)
412 struct device_node *node;
413 HvSubBusNumber SubBus = BridgeInfo->subBusNumber;
417 int IdSel = ISERIES_GET_DEVICE_FROM_SUBBUS(SubBus);
418 int Function = ISERIES_GET_FUNCTION_FROM_SUBBUS(SubBus);
419 HvAgentId EADsIdSel = ISERIES_PCI_AGENTID(IdSel, Function);
421 /* iSeries_allocate_IRQ.: 0x18.00.12(0xA3) */
422 Irq = iSeries_allocate_IRQ(Bus, 0, EADsIdSel);
425 * Connect all functions of any device found.
427 for (IdSel = 1; IdSel <= BridgeInfo->maxAgents; ++IdSel) {
428 for (Function = 0; Function < 8; ++Function) {
429 HvAgentId AgentId = ISERIES_PCI_AGENTID(IdSel, Function);
430 HvRc = HvCallXm_connectBusUnit(Bus, SubBus,
433 pci_Log_Error("Connect Bus Unit",
434 Bus, SubBus, AgentId, HvRc);
438 HvRc = HvCallPci_configLoad16(Bus, SubBus, AgentId,
439 PCI_VENDOR_ID, &VendorId);
441 pci_Log_Error("Read Vendor",
442 Bus, SubBus, AgentId, HvRc);
445 printk("read vendor ID: %x\n", VendorId);
447 /* FoundDevice: 0x18.28.10 = 0x12AE */
448 HvRc = HvCallPci_configStore8(Bus, SubBus, AgentId,
449 PCI_INTERRUPT_LINE, Irq);
451 pci_Log_Error("PciCfgStore Irq Failed!",
452 Bus, SubBus, AgentId, HvRc);
455 node = build_device_node(Bus, SubBus, EADsIdSel, Function);
456 PCI_DN(node)->Irq = Irq;
457 PCI_DN(node)->LogicalSlot = BridgeInfo->logicalSlotNumber;
459 } /* for (Function = 0; Function < 8; ++Function) */
460 } /* for (IdSel = 1; IdSel <= MaxAgents; ++IdSel) */
465 * I/0 Memory copy MUST use mmio commands on iSeries
466 * To do; For performance, include the hv call directly
468 void iSeries_memset_io(volatile void __iomem *dest, char c, size_t Count)
471 long NumberOfBytes = Count;
473 while (NumberOfBytes > 0) {
474 iSeries_Write_Byte(ByteValue, dest++);
478 EXPORT_SYMBOL(iSeries_memset_io);
480 void iSeries_memcpy_toio(volatile void __iomem *dest, void *source, size_t count)
483 long NumberOfBytes = count;
485 while (NumberOfBytes > 0) {
486 iSeries_Write_Byte(*src++, dest++);
490 EXPORT_SYMBOL(iSeries_memcpy_toio);
492 void iSeries_memcpy_fromio(void *dest, const volatile void __iomem *src, size_t count)
495 long NumberOfBytes = count;
497 while (NumberOfBytes > 0) {
498 *dst++ = iSeries_Read_Byte(src++);
502 EXPORT_SYMBOL(iSeries_memcpy_fromio);
505 * Look down the chain to find the matching Device Device
507 static struct device_node *find_Device_Node(int bus, int devfn)
511 list_for_each_entry(pdn, &iSeries_Global_Device_List, Device_List) {
512 if ((bus == pdn->busno) && (devfn == pdn->devfn))
520 * Returns the device node for the passed pci_dev
521 * Sanity Check Node PciDev to passed pci_dev
522 * If none is found, returns a NULL which the client must handle.
524 static struct device_node *get_Device_Node(struct pci_dev *pdev)
526 struct device_node *node;
528 node = pdev->sysdata;
529 if (node == NULL || PCI_DN(node)->pcidev != pdev)
530 node = find_Device_Node(pdev->bus->number, pdev->devfn);
536 * Config space read and write functions.
537 * For now at least, we look for the device node for the bus and devfn
538 * that we are asked to access. It may be possible to translate the devfn
539 * to a subbus and deviceid more directly.
541 static u64 hv_cfg_read_func[4] = {
542 HvCallPciConfigLoad8, HvCallPciConfigLoad16,
543 HvCallPciConfigLoad32, HvCallPciConfigLoad32
546 static u64 hv_cfg_write_func[4] = {
547 HvCallPciConfigStore8, HvCallPciConfigStore16,
548 HvCallPciConfigStore32, HvCallPciConfigStore32
552 * Read PCI config space
554 static int iSeries_pci_read_config(struct pci_bus *bus, unsigned int devfn,
555 int offset, int size, u32 *val)
557 struct device_node *node = find_Device_Node(bus->number, devfn);
559 struct HvCallPci_LoadReturn ret;
562 return PCIBIOS_DEVICE_NOT_FOUND;
565 return PCIBIOS_BAD_REGISTER_NUMBER;
568 fn = hv_cfg_read_func[(size - 1) & 3];
569 HvCall3Ret16(fn, &ret, iseries_ds_addr(node), offset, 0);
573 return PCIBIOS_DEVICE_NOT_FOUND; /* or something */
581 * Write PCI config space
584 static int iSeries_pci_write_config(struct pci_bus *bus, unsigned int devfn,
585 int offset, int size, u32 val)
587 struct device_node *node = find_Device_Node(bus->number, devfn);
592 return PCIBIOS_DEVICE_NOT_FOUND;
594 return PCIBIOS_BAD_REGISTER_NUMBER;
596 fn = hv_cfg_write_func[(size - 1) & 3];
597 ret = HvCall4(fn, iseries_ds_addr(node), offset, val, 0);
600 return PCIBIOS_DEVICE_NOT_FOUND;
605 static struct pci_ops iSeries_pci_ops = {
606 .read = iSeries_pci_read_config,
607 .write = iSeries_pci_write_config
612 * -> On Failure, print and log information.
613 * Increment Retry Count, if exceeds max, panic partition.
615 * PCI: Device 23.90 ReadL I/O Error( 0): 0x1234
616 * PCI: Device 23.90 ReadL Retry( 1)
617 * PCI: Device 23.90 ReadL Retry Successful(1)
619 static int CheckReturnCode(char *TextHdr, struct device_node *DevNode,
623 struct pci_dn *pdn = PCI_DN(DevNode);
627 printk("PCI: %s: Device 0x%04X:%02X I/O Error(%2d): 0x%04X\n",
628 TextHdr, pdn->busno, pdn->devfn,
631 * Bump the retry and check for retry count exceeded.
632 * If, Exceeded, panic the system.
634 if (((*retry) > Pci_Retry_Max) &&
635 (Pci_Error_Flag > 0)) {
636 mf_display_src(0xB6000103);
638 panic("PCI: Hardware I/O Error, SRC B6000103, "
639 "Automatic Reboot Disabled.\n");
641 return -1; /* Retry Try */
647 * Translate the I/O Address into a device node, bar, and bar offset.
648 * Note: Make sure the passed variable end up on the stack to avoid
649 * the exposure of being device global.
651 static inline struct device_node *xlate_iomm_address(
652 const volatile void __iomem *IoAddress,
653 u64 *dsaptr, u64 *BarOffsetPtr)
655 unsigned long OrigIoAddr;
656 unsigned long BaseIoAddr;
657 unsigned long TableIndex;
658 struct device_node *DevNode;
660 OrigIoAddr = (unsigned long __force)IoAddress;
661 if ((OrigIoAddr < BASE_IO_MEMORY) || (OrigIoAddr >= max_io_memory))
663 BaseIoAddr = OrigIoAddr - BASE_IO_MEMORY;
664 TableIndex = BaseIoAddr / IOMM_TABLE_ENTRY_SIZE;
665 DevNode = iomm_table[TableIndex];
667 if (DevNode != NULL) {
668 int barnum = iobar_table[TableIndex];
669 *dsaptr = iseries_ds_addr(DevNode) | (barnum << 24);
670 *BarOffsetPtr = BaseIoAddr % IOMM_TABLE_ENTRY_SIZE;
672 panic("PCI: Invalid PCI IoAddress detected!\n");
677 * Read MM I/O Instructions for the iSeries
678 * On MM I/O error, all ones are returned and iSeries_pci_IoError is cal
679 * else, data is returned in big Endian format.
681 * iSeries_Read_Byte = Read Byte ( 8 bit)
682 * iSeries_Read_Word = Read Word (16 bit)
683 * iSeries_Read_Long = Read Long (32 bit)
685 u8 iSeries_Read_Byte(const volatile void __iomem *IoAddress)
690 struct HvCallPci_LoadReturn ret;
691 struct device_node *DevNode =
692 xlate_iomm_address(IoAddress, &dsa, &BarOffset);
694 if (DevNode == NULL) {
695 static unsigned long last_jiffies;
696 static int num_printed;
698 if ((jiffies - last_jiffies) > 60 * HZ) {
699 last_jiffies = jiffies;
702 if (num_printed++ < 10)
703 printk(KERN_ERR "iSeries_Read_Byte: invalid access at IO address %p\n", IoAddress);
708 HvCall3Ret16(HvCallPciBarLoad8, &ret, dsa, BarOffset, 0);
709 } while (CheckReturnCode("RDB", DevNode, &retry, ret.rc) != 0);
711 return (u8)ret.value;
713 EXPORT_SYMBOL(iSeries_Read_Byte);
715 u16 iSeries_Read_Word(const volatile void __iomem *IoAddress)
720 struct HvCallPci_LoadReturn ret;
721 struct device_node *DevNode =
722 xlate_iomm_address(IoAddress, &dsa, &BarOffset);
724 if (DevNode == NULL) {
725 static unsigned long last_jiffies;
726 static int num_printed;
728 if ((jiffies - last_jiffies) > 60 * HZ) {
729 last_jiffies = jiffies;
732 if (num_printed++ < 10)
733 printk(KERN_ERR "iSeries_Read_Word: invalid access at IO address %p\n", IoAddress);
738 HvCall3Ret16(HvCallPciBarLoad16, &ret, dsa,
740 } while (CheckReturnCode("RDW", DevNode, &retry, ret.rc) != 0);
742 return swab16((u16)ret.value);
744 EXPORT_SYMBOL(iSeries_Read_Word);
746 u32 iSeries_Read_Long(const volatile void __iomem *IoAddress)
751 struct HvCallPci_LoadReturn ret;
752 struct device_node *DevNode =
753 xlate_iomm_address(IoAddress, &dsa, &BarOffset);
755 if (DevNode == NULL) {
756 static unsigned long last_jiffies;
757 static int num_printed;
759 if ((jiffies - last_jiffies) > 60 * HZ) {
760 last_jiffies = jiffies;
763 if (num_printed++ < 10)
764 printk(KERN_ERR "iSeries_Read_Long: invalid access at IO address %p\n", IoAddress);
769 HvCall3Ret16(HvCallPciBarLoad32, &ret, dsa,
771 } while (CheckReturnCode("RDL", DevNode, &retry, ret.rc) != 0);
773 return swab32((u32)ret.value);
775 EXPORT_SYMBOL(iSeries_Read_Long);
778 * Write MM I/O Instructions for the iSeries
780 * iSeries_Write_Byte = Write Byte (8 bit)
781 * iSeries_Write_Word = Write Word(16 bit)
782 * iSeries_Write_Long = Write Long(32 bit)
784 void iSeries_Write_Byte(u8 data, volatile void __iomem *IoAddress)
790 struct device_node *DevNode =
791 xlate_iomm_address(IoAddress, &dsa, &BarOffset);
793 if (DevNode == NULL) {
794 static unsigned long last_jiffies;
795 static int num_printed;
797 if ((jiffies - last_jiffies) > 60 * HZ) {
798 last_jiffies = jiffies;
801 if (num_printed++ < 10)
802 printk(KERN_ERR "iSeries_Write_Byte: invalid access at IO address %p\n", IoAddress);
806 ++Pci_Io_Write_Count;
807 rc = HvCall4(HvCallPciBarStore8, dsa, BarOffset, data, 0);
808 } while (CheckReturnCode("WWB", DevNode, &retry, rc) != 0);
810 EXPORT_SYMBOL(iSeries_Write_Byte);
812 void iSeries_Write_Word(u16 data, volatile void __iomem *IoAddress)
818 struct device_node *DevNode =
819 xlate_iomm_address(IoAddress, &dsa, &BarOffset);
821 if (DevNode == NULL) {
822 static unsigned long last_jiffies;
823 static int num_printed;
825 if ((jiffies - last_jiffies) > 60 * HZ) {
826 last_jiffies = jiffies;
829 if (num_printed++ < 10)
830 printk(KERN_ERR "iSeries_Write_Word: invalid access at IO address %p\n", IoAddress);
834 ++Pci_Io_Write_Count;
835 rc = HvCall4(HvCallPciBarStore16, dsa, BarOffset, swab16(data), 0);
836 } while (CheckReturnCode("WWW", DevNode, &retry, rc) != 0);
838 EXPORT_SYMBOL(iSeries_Write_Word);
840 void iSeries_Write_Long(u32 data, volatile void __iomem *IoAddress)
846 struct device_node *DevNode =
847 xlate_iomm_address(IoAddress, &dsa, &BarOffset);
849 if (DevNode == NULL) {
850 static unsigned long last_jiffies;
851 static int num_printed;
853 if ((jiffies - last_jiffies) > 60 * HZ) {
854 last_jiffies = jiffies;
857 if (num_printed++ < 10)
858 printk(KERN_ERR "iSeries_Write_Long: invalid access at IO address %p\n", IoAddress);
862 ++Pci_Io_Write_Count;
863 rc = HvCall4(HvCallPciBarStore32, dsa, BarOffset, swab32(data), 0);
864 } while (CheckReturnCode("WWL", DevNode, &retry, rc) != 0);
866 EXPORT_SYMBOL(iSeries_Write_Long);