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/ppcdebug.h>
36 #include <asm/iommu.h>
38 #include <asm/iSeries/HvCallPci.h>
39 #include <asm/iSeries/HvCallXm.h>
40 #include <asm/iSeries/iSeries_pci.h>
41 #include <asm/iSeries/mf.h>
43 #include <asm/ppc-pci.h>
47 extern unsigned long io_page_mask;
50 * Forward declares of prototypes.
52 static struct device_node *find_Device_Node(int bus, int devfn);
53 static void scan_PHB_slots(struct pci_controller *Phb);
54 static void scan_EADS_bridge(HvBusNumber Bus, HvSubBusNumber SubBus, int IdSel);
55 static int scan_bridge_slot(HvBusNumber Bus, struct HvCallPci_BridgeInfo *Info);
57 LIST_HEAD(iSeries_Global_Device_List);
59 static int DeviceCount;
61 /* Counters and control flags. */
62 static long Pci_Io_Read_Count;
63 static long Pci_Io_Write_Count;
65 static long Pci_Cfg_Read_Count;
66 static long Pci_Cfg_Write_Count;
68 static long Pci_Error_Count;
70 static int Pci_Retry_Max = 3; /* Only retry 3 times */
71 static int Pci_Error_Flag = 1; /* Set Retry Error on. */
73 static struct pci_ops iSeries_pci_ops;
77 * Each Entry size is 4 MB * 1024 Entries = 4GB I/O address space.
79 #define IOMM_TABLE_MAX_ENTRIES 1024
80 #define IOMM_TABLE_ENTRY_SIZE 0x0000000000400000UL
81 #define BASE_IO_MEMORY 0xE000000000000000UL
83 static unsigned long max_io_memory = 0xE000000000000000UL;
84 static long current_iomm_table_entry;
89 static struct device_node **iomm_table;
90 static u8 *iobar_table;
93 * Static and Global variables
95 static char *pci_io_text = "iSeries PCI I/O";
96 static DEFINE_SPINLOCK(iomm_table_lock);
99 * iomm_table_initialize
101 * Allocates and initalizes the Address Translation Table and Bar
102 * Tables to get them ready for use. Must be called before any
103 * I/O space is handed out to the device BARs.
105 static void iomm_table_initialize(void)
107 spin_lock(&iomm_table_lock);
108 iomm_table = kmalloc(sizeof(*iomm_table) * IOMM_TABLE_MAX_ENTRIES,
110 iobar_table = kmalloc(sizeof(*iobar_table) * IOMM_TABLE_MAX_ENTRIES,
112 spin_unlock(&iomm_table_lock);
113 if ((iomm_table == NULL) || (iobar_table == NULL))
114 panic("PCI: I/O tables allocation failed.\n");
118 * iomm_table_allocate_entry
120 * Adds pci_dev entry in address translation table
122 * - Allocates the number of entries required in table base on BAR
124 * - Allocates starting at BASE_IO_MEMORY and increases.
125 * - The size is round up to be a multiple of entry size.
126 * - CurrentIndex is incremented to keep track of the last entry.
127 * - Builds the resource entry for allocated BARs.
129 static void iomm_table_allocate_entry(struct pci_dev *dev, int bar_num)
131 struct resource *bar_res = &dev->resource[bar_num];
132 long bar_size = pci_resource_len(dev, bar_num);
135 * No space to allocate, quick exit, skip Allocation.
140 * Set Resource values.
142 spin_lock(&iomm_table_lock);
143 bar_res->name = pci_io_text;
145 IOMM_TABLE_ENTRY_SIZE * current_iomm_table_entry;
146 bar_res->start += BASE_IO_MEMORY;
147 bar_res->end = bar_res->start + bar_size - 1;
149 * Allocate the number of table entries needed for BAR.
151 while (bar_size > 0 ) {
152 iomm_table[current_iomm_table_entry] = dev->sysdata;
153 iobar_table[current_iomm_table_entry] = bar_num;
154 bar_size -= IOMM_TABLE_ENTRY_SIZE;
155 ++current_iomm_table_entry;
157 max_io_memory = BASE_IO_MEMORY +
158 (IOMM_TABLE_ENTRY_SIZE * current_iomm_table_entry);
159 spin_unlock(&iomm_table_lock);
163 * allocate_device_bars
165 * - Allocates ALL pci_dev BAR's and updates the resources with the
166 * BAR value. BARS with zero length will have the resources
167 * The HvCallPci_getBarParms is used to get the size of the BAR
168 * space. It calls iomm_table_allocate_entry to allocate
170 * - Loops through The Bar resources(0 - 5) including the ROM
173 static void allocate_device_bars(struct pci_dev *dev)
175 struct resource *bar_res;
178 for (bar_num = 0; bar_num <= PCI_ROM_RESOURCE; ++bar_num) {
179 bar_res = &dev->resource[bar_num];
180 iomm_table_allocate_entry(dev, bar_num);
185 * Log error information to system console.
186 * Filter out the device not there errors.
187 * PCI: EADs Connect Failed 0x18.58.10 Rc: 0x00xx
188 * PCI: Read Vendor Failed 0x18.58.10 Rc: 0x00xx
189 * PCI: Connect Bus Unit Failed 0x18.58.10 Rc: 0x00xx
191 static void pci_Log_Error(char *Error_Text, int Bus, int SubBus,
192 int AgentId, int HvRc)
196 printk(KERN_ERR "PCI: %s Failed: 0x%02X.%02X.%02X Rc: 0x%04X",
197 Error_Text, Bus, SubBus, AgentId, HvRc);
201 * build_device_node(u16 Bus, int SubBus, u8 DevFn)
203 static struct device_node *build_device_node(HvBusNumber Bus,
204 HvSubBusNumber SubBus, int AgentId, int Function)
206 struct device_node *node;
209 PPCDBG(PPCDBG_BUSWALK,
210 "-build_device_node 0x%02X.%02X.%02X Function: %02X\n",
211 Bus, SubBus, AgentId, Function);
213 node = kmalloc(sizeof(struct device_node), GFP_KERNEL);
216 memset(node, 0, sizeof(struct device_node));
217 pdn = kzalloc(sizeof(*pdn), GFP_KERNEL);
224 list_add_tail(&pdn->Device_List, &iSeries_Global_Device_List);
226 pdn->DsaAddr = ((u64)Bus << 48) + ((u64)SubBus << 40) + ((u64)0x10 << 32);
228 pdn->DsaAddr.DsaAddr = 0;
229 pdn->DsaAddr.Dsa.busNumber = Bus;
230 pdn->DsaAddr.Dsa.subBusNumber = SubBus;
231 pdn->DsaAddr.Dsa.deviceId = 0x10;
232 pdn->devfn = PCI_DEVFN(ISERIES_ENCODE_DEVICE(AgentId), Function);
237 * unsigned long __init find_and_init_phbs(void)
240 * This function checks for all possible system PCI host bridges that connect
241 * PCI buses. The system hypervisor is queried as to the guest partition
242 * ownership status. A pci_controller is built for any bus which is partially
243 * owned or fully owned by this guest partition.
245 unsigned long __init find_and_init_phbs(void)
247 struct pci_controller *phb;
250 PPCDBG(PPCDBG_BUSWALK, "find_and_init_phbs Entry\n");
252 /* Check all possible buses. */
253 for (bus = 0; bus < 256; bus++) {
254 int ret = HvCallXm_testBus(bus);
256 printk("bus %d appears to exist\n", bus);
258 phb = (struct pci_controller *)kmalloc(sizeof(struct pci_controller), GFP_KERNEL);
261 pci_setup_pci_controller(phb);
263 phb->pci_mem_offset = phb->local_number = bus;
264 phb->first_busno = bus;
265 phb->last_busno = bus;
266 phb->ops = &iSeries_pci_ops;
268 PPCDBG(PPCDBG_BUSWALK, "PCI:Create iSeries pci_controller(%p), Bus: %04X\n",
271 /* Find and connect the devices. */
275 * Check for Unexpected Return code, a clue that something
278 else if (ret != 0x0301)
279 printk(KERN_ERR "Unexpected Return on Probe(0x%04X): 0x%04X",
286 * iSeries_pcibios_init
288 * Chance to initialize and structures or variable before PCI Bus walk.
290 void iSeries_pcibios_init(void)
292 PPCDBG(PPCDBG_BUSWALK, "iSeries_pcibios_init Entry.\n");
293 iomm_table_initialize();
294 find_and_init_phbs();
296 PPCDBG(PPCDBG_BUSWALK, "iSeries_pcibios_init Exit.\n");
300 * iSeries_pci_final_fixup(void)
302 void __init iSeries_pci_final_fixup(void)
304 struct pci_dev *pdev = NULL;
305 struct device_node *node;
308 PPCDBG(PPCDBG_BUSWALK, "iSeries_pcibios_fixup Entry.\n");
310 /* Fix up at the device node and pci_dev relationship */
311 mf_display_src(0xC9000100);
313 printk("pcibios_final_fixup\n");
314 for_each_pci_dev(pdev) {
315 node = find_Device_Node(pdev->bus->number, pdev->devfn);
316 printk("pci dev %p (%x.%x), node %p\n", pdev,
317 pdev->bus->number, pdev->devfn, node);
321 pdev->sysdata = (void *)node;
322 PCI_DN(node)->pcidev = pdev;
323 PPCDBG(PPCDBG_BUSWALK,
324 "pdev 0x%p <==> DevNode 0x%p\n",
326 allocate_device_bars(pdev);
327 iSeries_Device_Information(pdev, DeviceCount);
328 iommu_devnode_init_iSeries(node);
330 printk("PCI: Device Tree not found for 0x%016lX\n",
331 (unsigned long)pdev);
332 pdev->irq = PCI_DN(node)->Irq;
334 iSeries_activate_IRQs();
335 mf_display_src(0xC9000200);
338 void pcibios_fixup_bus(struct pci_bus *PciBus)
340 PPCDBG(PPCDBG_BUSWALK, "iSeries_pcibios_fixup_bus(0x%04X) Entry.\n",
344 void pcibios_fixup_resources(struct pci_dev *pdev)
346 PPCDBG(PPCDBG_BUSWALK, "fixup_resources pdev %p\n", pdev);
350 * Loop through each node function to find usable EADs bridges.
352 static void scan_PHB_slots(struct pci_controller *Phb)
354 struct HvCallPci_DeviceInfo *DevInfo;
355 HvBusNumber bus = Phb->local_number; /* System Bus */
356 const HvSubBusNumber SubBus = 0; /* EADs is always 0. */
359 const int MaxAgents = 8;
361 DevInfo = (struct HvCallPci_DeviceInfo*)
362 kmalloc(sizeof(struct HvCallPci_DeviceInfo), GFP_KERNEL);
367 * Probe for EADs Bridges
369 for (IdSel = 1; IdSel < MaxAgents; ++IdSel) {
370 HvRc = HvCallPci_getDeviceInfo(bus, SubBus, IdSel,
371 ISERIES_HV_ADDR(DevInfo),
372 sizeof(struct HvCallPci_DeviceInfo));
374 if (DevInfo->deviceType == HvCallPci_NodeDevice)
375 scan_EADS_bridge(bus, SubBus, IdSel);
377 printk("PCI: Invalid System Configuration(0x%02X)"
378 " for bus 0x%02x id 0x%02x.\n",
379 DevInfo->deviceType, bus, IdSel);
382 pci_Log_Error("getDeviceInfo", bus, SubBus, IdSel, HvRc);
387 static void scan_EADS_bridge(HvBusNumber bus, HvSubBusNumber SubBus,
390 struct HvCallPci_BridgeInfo *BridgeInfo;
395 BridgeInfo = (struct HvCallPci_BridgeInfo *)
396 kmalloc(sizeof(struct HvCallPci_BridgeInfo), GFP_KERNEL);
397 if (BridgeInfo == NULL)
400 /* Note: hvSubBus and irq is always be 0 at this level! */
401 for (Function = 0; Function < 8; ++Function) {
402 AgentId = ISERIES_PCI_AGENTID(IdSel, Function);
403 HvRc = HvCallXm_connectBusUnit(bus, SubBus, AgentId, 0);
405 printk("found device at bus %d idsel %d func %d (AgentId %x)\n",
406 bus, IdSel, Function, AgentId);
407 /* Connect EADs: 0x18.00.12 = 0x00 */
408 PPCDBG(PPCDBG_BUSWALK,
409 "PCI:Connect EADs: 0x%02X.%02X.%02X\n",
410 bus, SubBus, AgentId);
411 HvRc = HvCallPci_getBusUnitInfo(bus, SubBus, AgentId,
412 ISERIES_HV_ADDR(BridgeInfo),
413 sizeof(struct HvCallPci_BridgeInfo));
415 printk("bridge info: type %x subbus %x maxAgents %x maxsubbus %x logslot %x\n",
416 BridgeInfo->busUnitInfo.deviceType,
417 BridgeInfo->subBusNumber,
418 BridgeInfo->maxAgents,
419 BridgeInfo->maxSubBusNumber,
420 BridgeInfo->logicalSlotNumber);
421 PPCDBG(PPCDBG_BUSWALK,
422 "PCI: BridgeInfo, Type:0x%02X, SubBus:0x%02X, MaxAgents:0x%02X, MaxSubBus: 0x%02X, LSlot: 0x%02X\n",
423 BridgeInfo->busUnitInfo.deviceType,
424 BridgeInfo->subBusNumber,
425 BridgeInfo->maxAgents,
426 BridgeInfo->maxSubBusNumber,
427 BridgeInfo->logicalSlotNumber);
429 if (BridgeInfo->busUnitInfo.deviceType ==
430 HvCallPci_BridgeDevice) {
431 /* Scan_Bridge_Slot...: 0x18.00.12 */
432 scan_bridge_slot(bus, BridgeInfo);
434 printk("PCI: Invalid Bridge Configuration(0x%02X)",
435 BridgeInfo->busUnitInfo.deviceType);
437 } else if (HvRc != 0x000B)
438 pci_Log_Error("EADs Connect",
439 bus, SubBus, AgentId, HvRc);
445 * This assumes that the node slot is always on the primary bus!
447 static int scan_bridge_slot(HvBusNumber Bus,
448 struct HvCallPci_BridgeInfo *BridgeInfo)
450 struct device_node *node;
451 HvSubBusNumber SubBus = BridgeInfo->subBusNumber;
455 int IdSel = ISERIES_GET_DEVICE_FROM_SUBBUS(SubBus);
456 int Function = ISERIES_GET_FUNCTION_FROM_SUBBUS(SubBus);
457 HvAgentId EADsIdSel = ISERIES_PCI_AGENTID(IdSel, Function);
459 /* iSeries_allocate_IRQ.: 0x18.00.12(0xA3) */
460 Irq = iSeries_allocate_IRQ(Bus, 0, EADsIdSel);
461 PPCDBG(PPCDBG_BUSWALK,
462 "PCI:- allocate and assign IRQ 0x%02X.%02X.%02X = 0x%02X\n",
463 Bus, 0, EADsIdSel, Irq);
466 * Connect all functions of any device found.
468 for (IdSel = 1; IdSel <= BridgeInfo->maxAgents; ++IdSel) {
469 for (Function = 0; Function < 8; ++Function) {
470 HvAgentId AgentId = ISERIES_PCI_AGENTID(IdSel, Function);
471 HvRc = HvCallXm_connectBusUnit(Bus, SubBus,
474 pci_Log_Error("Connect Bus Unit",
475 Bus, SubBus, AgentId, HvRc);
479 HvRc = HvCallPci_configLoad16(Bus, SubBus, AgentId,
480 PCI_VENDOR_ID, &VendorId);
482 pci_Log_Error("Read Vendor",
483 Bus, SubBus, AgentId, HvRc);
486 printk("read vendor ID: %x\n", VendorId);
488 /* FoundDevice: 0x18.28.10 = 0x12AE */
489 PPCDBG(PPCDBG_BUSWALK,
490 "PCI:- FoundDevice: 0x%02X.%02X.%02X = 0x%04X, irq %d\n",
491 Bus, SubBus, AgentId, VendorId, Irq);
492 HvRc = HvCallPci_configStore8(Bus, SubBus, AgentId,
493 PCI_INTERRUPT_LINE, Irq);
495 pci_Log_Error("PciCfgStore Irq Failed!",
496 Bus, SubBus, AgentId, HvRc);
499 node = build_device_node(Bus, SubBus, EADsIdSel, Function);
500 PCI_DN(node)->Irq = Irq;
501 PCI_DN(node)->LogicalSlot = BridgeInfo->logicalSlotNumber;
503 } /* for (Function = 0; Function < 8; ++Function) */
504 } /* for (IdSel = 1; IdSel <= MaxAgents; ++IdSel) */
509 * I/0 Memory copy MUST use mmio commands on iSeries
510 * To do; For performance, include the hv call directly
512 void iSeries_memset_io(volatile void __iomem *dest, char c, size_t Count)
515 long NumberOfBytes = Count;
517 while (NumberOfBytes > 0) {
518 iSeries_Write_Byte(ByteValue, dest++);
522 EXPORT_SYMBOL(iSeries_memset_io);
524 void iSeries_memcpy_toio(volatile void __iomem *dest, void *source, size_t count)
527 long NumberOfBytes = count;
529 while (NumberOfBytes > 0) {
530 iSeries_Write_Byte(*src++, dest++);
534 EXPORT_SYMBOL(iSeries_memcpy_toio);
536 void iSeries_memcpy_fromio(void *dest, const volatile void __iomem *src, size_t count)
539 long NumberOfBytes = count;
541 while (NumberOfBytes > 0) {
542 *dst++ = iSeries_Read_Byte(src++);
546 EXPORT_SYMBOL(iSeries_memcpy_fromio);
549 * Look down the chain to find the matching Device Device
551 static struct device_node *find_Device_Node(int bus, int devfn)
555 list_for_each_entry(pdn, &iSeries_Global_Device_List, Device_List) {
556 if ((bus == pdn->DsaAddr.Dsa.busNumber) &&
557 (devfn == pdn->devfn))
565 * Returns the device node for the passed pci_dev
566 * Sanity Check Node PciDev to passed pci_dev
567 * If none is found, returns a NULL which the client must handle.
569 static struct device_node *get_Device_Node(struct pci_dev *pdev)
571 struct device_node *node;
573 node = pdev->sysdata;
574 if (node == NULL || PCI_DN(node)->pcidev != pdev)
575 node = find_Device_Node(pdev->bus->number, pdev->devfn);
581 * Config space read and write functions.
582 * For now at least, we look for the device node for the bus and devfn
583 * that we are asked to access. It may be possible to translate the devfn
584 * to a subbus and deviceid more directly.
586 static u64 hv_cfg_read_func[4] = {
587 HvCallPciConfigLoad8, HvCallPciConfigLoad16,
588 HvCallPciConfigLoad32, HvCallPciConfigLoad32
591 static u64 hv_cfg_write_func[4] = {
592 HvCallPciConfigStore8, HvCallPciConfigStore16,
593 HvCallPciConfigStore32, HvCallPciConfigStore32
597 * Read PCI config space
599 static int iSeries_pci_read_config(struct pci_bus *bus, unsigned int devfn,
600 int offset, int size, u32 *val)
602 struct device_node *node = find_Device_Node(bus->number, devfn);
604 struct HvCallPci_LoadReturn ret;
607 return PCIBIOS_DEVICE_NOT_FOUND;
610 return PCIBIOS_BAD_REGISTER_NUMBER;
613 fn = hv_cfg_read_func[(size - 1) & 3];
614 HvCall3Ret16(fn, &ret, PCI_DN(node)->DsaAddr.DsaAddr, offset, 0);
618 return PCIBIOS_DEVICE_NOT_FOUND; /* or something */
626 * Write PCI config space
629 static int iSeries_pci_write_config(struct pci_bus *bus, unsigned int devfn,
630 int offset, int size, u32 val)
632 struct device_node *node = find_Device_Node(bus->number, devfn);
637 return PCIBIOS_DEVICE_NOT_FOUND;
639 return PCIBIOS_BAD_REGISTER_NUMBER;
641 fn = hv_cfg_write_func[(size - 1) & 3];
642 ret = HvCall4(fn, PCI_DN(node)->DsaAddr.DsaAddr, offset, val, 0);
645 return PCIBIOS_DEVICE_NOT_FOUND;
650 static struct pci_ops iSeries_pci_ops = {
651 .read = iSeries_pci_read_config,
652 .write = iSeries_pci_write_config
657 * -> On Failure, print and log information.
658 * Increment Retry Count, if exceeds max, panic partition.
660 * PCI: Device 23.90 ReadL I/O Error( 0): 0x1234
661 * PCI: Device 23.90 ReadL Retry( 1)
662 * PCI: Device 23.90 ReadL Retry Successful(1)
664 static int CheckReturnCode(char *TextHdr, struct device_node *DevNode,
668 struct pci_dn *pdn = PCI_DN(DevNode);
672 printk("PCI: %s: Device 0x%04X:%02X I/O Error(%2d): 0x%04X\n",
673 TextHdr, pdn->DsaAddr.Dsa.busNumber, pdn->devfn,
676 * Bump the retry and check for retry count exceeded.
677 * If, Exceeded, panic the system.
679 if (((*retry) > Pci_Retry_Max) &&
680 (Pci_Error_Flag > 0)) {
681 mf_display_src(0xB6000103);
683 panic("PCI: Hardware I/O Error, SRC B6000103, "
684 "Automatic Reboot Disabled.\n");
686 return -1; /* Retry Try */
692 * Translate the I/O Address into a device node, bar, and bar offset.
693 * Note: Make sure the passed variable end up on the stack to avoid
694 * the exposure of being device global.
696 static inline struct device_node *xlate_iomm_address(
697 const volatile void __iomem *IoAddress,
698 u64 *dsaptr, u64 *BarOffsetPtr)
700 unsigned long OrigIoAddr;
701 unsigned long BaseIoAddr;
702 unsigned long TableIndex;
703 struct device_node *DevNode;
705 OrigIoAddr = (unsigned long __force)IoAddress;
706 if ((OrigIoAddr < BASE_IO_MEMORY) || (OrigIoAddr >= max_io_memory))
708 BaseIoAddr = OrigIoAddr - BASE_IO_MEMORY;
709 TableIndex = BaseIoAddr / IOMM_TABLE_ENTRY_SIZE;
710 DevNode = iomm_table[TableIndex];
712 if (DevNode != NULL) {
713 int barnum = iobar_table[TableIndex];
714 *dsaptr = PCI_DN(DevNode)->DsaAddr.DsaAddr | (barnum << 24);
715 *BarOffsetPtr = BaseIoAddr % IOMM_TABLE_ENTRY_SIZE;
717 panic("PCI: Invalid PCI IoAddress detected!\n");
722 * Read MM I/O Instructions for the iSeries
723 * On MM I/O error, all ones are returned and iSeries_pci_IoError is cal
724 * else, data is returned in big Endian format.
726 * iSeries_Read_Byte = Read Byte ( 8 bit)
727 * iSeries_Read_Word = Read Word (16 bit)
728 * iSeries_Read_Long = Read Long (32 bit)
730 u8 iSeries_Read_Byte(const volatile void __iomem *IoAddress)
735 struct HvCallPci_LoadReturn ret;
736 struct device_node *DevNode =
737 xlate_iomm_address(IoAddress, &dsa, &BarOffset);
739 if (DevNode == NULL) {
740 static unsigned long last_jiffies;
741 static int num_printed;
743 if ((jiffies - last_jiffies) > 60 * HZ) {
744 last_jiffies = jiffies;
747 if (num_printed++ < 10)
748 printk(KERN_ERR "iSeries_Read_Byte: invalid access at IO address %p\n", IoAddress);
753 HvCall3Ret16(HvCallPciBarLoad8, &ret, dsa, BarOffset, 0);
754 } while (CheckReturnCode("RDB", DevNode, &retry, ret.rc) != 0);
756 return (u8)ret.value;
758 EXPORT_SYMBOL(iSeries_Read_Byte);
760 u16 iSeries_Read_Word(const volatile void __iomem *IoAddress)
765 struct HvCallPci_LoadReturn ret;
766 struct device_node *DevNode =
767 xlate_iomm_address(IoAddress, &dsa, &BarOffset);
769 if (DevNode == NULL) {
770 static unsigned long last_jiffies;
771 static int num_printed;
773 if ((jiffies - last_jiffies) > 60 * HZ) {
774 last_jiffies = jiffies;
777 if (num_printed++ < 10)
778 printk(KERN_ERR "iSeries_Read_Word: invalid access at IO address %p\n", IoAddress);
783 HvCall3Ret16(HvCallPciBarLoad16, &ret, dsa,
785 } while (CheckReturnCode("RDW", DevNode, &retry, ret.rc) != 0);
787 return swab16((u16)ret.value);
789 EXPORT_SYMBOL(iSeries_Read_Word);
791 u32 iSeries_Read_Long(const volatile void __iomem *IoAddress)
796 struct HvCallPci_LoadReturn ret;
797 struct device_node *DevNode =
798 xlate_iomm_address(IoAddress, &dsa, &BarOffset);
800 if (DevNode == NULL) {
801 static unsigned long last_jiffies;
802 static int num_printed;
804 if ((jiffies - last_jiffies) > 60 * HZ) {
805 last_jiffies = jiffies;
808 if (num_printed++ < 10)
809 printk(KERN_ERR "iSeries_Read_Long: invalid access at IO address %p\n", IoAddress);
814 HvCall3Ret16(HvCallPciBarLoad32, &ret, dsa,
816 } while (CheckReturnCode("RDL", DevNode, &retry, ret.rc) != 0);
818 return swab32((u32)ret.value);
820 EXPORT_SYMBOL(iSeries_Read_Long);
823 * Write MM I/O Instructions for the iSeries
825 * iSeries_Write_Byte = Write Byte (8 bit)
826 * iSeries_Write_Word = Write Word(16 bit)
827 * iSeries_Write_Long = Write Long(32 bit)
829 void iSeries_Write_Byte(u8 data, volatile void __iomem *IoAddress)
835 struct device_node *DevNode =
836 xlate_iomm_address(IoAddress, &dsa, &BarOffset);
838 if (DevNode == NULL) {
839 static unsigned long last_jiffies;
840 static int num_printed;
842 if ((jiffies - last_jiffies) > 60 * HZ) {
843 last_jiffies = jiffies;
846 if (num_printed++ < 10)
847 printk(KERN_ERR "iSeries_Write_Byte: invalid access at IO address %p\n", IoAddress);
851 ++Pci_Io_Write_Count;
852 rc = HvCall4(HvCallPciBarStore8, dsa, BarOffset, data, 0);
853 } while (CheckReturnCode("WWB", DevNode, &retry, rc) != 0);
855 EXPORT_SYMBOL(iSeries_Write_Byte);
857 void iSeries_Write_Word(u16 data, volatile void __iomem *IoAddress)
863 struct device_node *DevNode =
864 xlate_iomm_address(IoAddress, &dsa, &BarOffset);
866 if (DevNode == NULL) {
867 static unsigned long last_jiffies;
868 static int num_printed;
870 if ((jiffies - last_jiffies) > 60 * HZ) {
871 last_jiffies = jiffies;
874 if (num_printed++ < 10)
875 printk(KERN_ERR "iSeries_Write_Word: invalid access at IO address %p\n", IoAddress);
879 ++Pci_Io_Write_Count;
880 rc = HvCall4(HvCallPciBarStore16, dsa, BarOffset, swab16(data), 0);
881 } while (CheckReturnCode("WWW", DevNode, &retry, rc) != 0);
883 EXPORT_SYMBOL(iSeries_Write_Word);
885 void iSeries_Write_Long(u32 data, volatile void __iomem *IoAddress)
891 struct device_node *DevNode =
892 xlate_iomm_address(IoAddress, &dsa, &BarOffset);
894 if (DevNode == NULL) {
895 static unsigned long last_jiffies;
896 static int num_printed;
898 if ((jiffies - last_jiffies) > 60 * HZ) {
899 last_jiffies = jiffies;
902 if (num_printed++ < 10)
903 printk(KERN_ERR "iSeries_Write_Long: invalid access at IO address %p\n", IoAddress);
907 ++Pci_Io_Write_Count;
908 rc = HvCall4(HvCallPciBarStore32, dsa, BarOffset, swab32(data), 0);
909 } while (CheckReturnCode("WWL", DevNode, &retry, rc) != 0);
911 EXPORT_SYMBOL(iSeries_Write_Long);