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>
37 #include <asm/abs_addr.h>
39 #include <asm/iseries/hv_call_xm.h>
40 #include <asm/iseries/mf.h>
42 #include <asm/ppc-pci.h>
48 extern unsigned long io_page_mask;
51 * Forward declares of prototypes.
53 static struct device_node *find_Device_Node(int bus, int devfn);
54 static void scan_PHB_slots(struct pci_controller *Phb);
55 static void scan_EADS_bridge(HvBusNumber Bus, HvSubBusNumber SubBus, int IdSel);
56 static int scan_bridge_slot(HvBusNumber Bus, struct HvCallPci_BridgeInfo *Info);
58 LIST_HEAD(iSeries_Global_Device_List);
60 static int DeviceCount;
62 /* Counters and control flags. */
63 static long Pci_Io_Read_Count;
64 static long Pci_Io_Write_Count;
66 static long Pci_Cfg_Read_Count;
67 static long Pci_Cfg_Write_Count;
69 static long Pci_Error_Count;
71 static int Pci_Retry_Max = 3; /* Only retry 3 times */
72 static int Pci_Error_Flag = 1; /* Set Retry Error on. */
74 static struct pci_ops iSeries_pci_ops;
78 * Each Entry size is 4 MB * 1024 Entries = 4GB I/O address space.
80 #define IOMM_TABLE_MAX_ENTRIES 1024
81 #define IOMM_TABLE_ENTRY_SIZE 0x0000000000400000UL
82 #define BASE_IO_MEMORY 0xE000000000000000UL
84 static unsigned long max_io_memory = 0xE000000000000000UL;
85 static long current_iomm_table_entry;
90 static struct device_node **iomm_table;
91 static u8 *iobar_table;
94 * Static and Global variables
96 static char *pci_io_text = "iSeries PCI I/O";
97 static DEFINE_SPINLOCK(iomm_table_lock);
100 * iomm_table_initialize
102 * Allocates and initalizes the Address Translation Table and Bar
103 * Tables to get them ready for use. Must be called before any
104 * I/O space is handed out to the device BARs.
106 static void iomm_table_initialize(void)
108 spin_lock(&iomm_table_lock);
109 iomm_table = kmalloc(sizeof(*iomm_table) * IOMM_TABLE_MAX_ENTRIES,
111 iobar_table = kmalloc(sizeof(*iobar_table) * IOMM_TABLE_MAX_ENTRIES,
113 spin_unlock(&iomm_table_lock);
114 if ((iomm_table == NULL) || (iobar_table == NULL))
115 panic("PCI: I/O tables allocation failed.\n");
119 * iomm_table_allocate_entry
121 * Adds pci_dev entry in address translation table
123 * - Allocates the number of entries required in table base on BAR
125 * - Allocates starting at BASE_IO_MEMORY and increases.
126 * - The size is round up to be a multiple of entry size.
127 * - CurrentIndex is incremented to keep track of the last entry.
128 * - Builds the resource entry for allocated BARs.
130 static void iomm_table_allocate_entry(struct pci_dev *dev, int bar_num)
132 struct resource *bar_res = &dev->resource[bar_num];
133 long bar_size = pci_resource_len(dev, bar_num);
136 * No space to allocate, quick exit, skip Allocation.
141 * Set Resource values.
143 spin_lock(&iomm_table_lock);
144 bar_res->name = pci_io_text;
146 IOMM_TABLE_ENTRY_SIZE * current_iomm_table_entry;
147 bar_res->start += BASE_IO_MEMORY;
148 bar_res->end = bar_res->start + bar_size - 1;
150 * Allocate the number of table entries needed for BAR.
152 while (bar_size > 0 ) {
153 iomm_table[current_iomm_table_entry] = dev->sysdata;
154 iobar_table[current_iomm_table_entry] = bar_num;
155 bar_size -= IOMM_TABLE_ENTRY_SIZE;
156 ++current_iomm_table_entry;
158 max_io_memory = BASE_IO_MEMORY +
159 (IOMM_TABLE_ENTRY_SIZE * current_iomm_table_entry);
160 spin_unlock(&iomm_table_lock);
164 * allocate_device_bars
166 * - Allocates ALL pci_dev BAR's and updates the resources with the
167 * BAR value. BARS with zero length will have the resources
168 * The HvCallPci_getBarParms is used to get the size of the BAR
169 * space. It calls iomm_table_allocate_entry to allocate
171 * - Loops through The Bar resources(0 - 5) including the ROM
174 static void allocate_device_bars(struct pci_dev *dev)
176 struct resource *bar_res;
179 for (bar_num = 0; bar_num <= PCI_ROM_RESOURCE; ++bar_num) {
180 bar_res = &dev->resource[bar_num];
181 iomm_table_allocate_entry(dev, bar_num);
186 * Log error information to system console.
187 * Filter out the device not there errors.
188 * PCI: EADs Connect Failed 0x18.58.10 Rc: 0x00xx
189 * PCI: Read Vendor Failed 0x18.58.10 Rc: 0x00xx
190 * PCI: Connect Bus Unit Failed 0x18.58.10 Rc: 0x00xx
192 static void pci_Log_Error(char *Error_Text, int Bus, int SubBus,
193 int AgentId, int HvRc)
197 printk(KERN_ERR "PCI: %s Failed: 0x%02X.%02X.%02X Rc: 0x%04X",
198 Error_Text, Bus, SubBus, AgentId, HvRc);
202 * build_device_node(u16 Bus, int SubBus, u8 DevFn)
204 static struct device_node *build_device_node(HvBusNumber Bus,
205 HvSubBusNumber SubBus, int AgentId, int Function)
207 struct device_node *node;
210 PPCDBG(PPCDBG_BUSWALK,
211 "-build_device_node 0x%02X.%02X.%02X Function: %02X\n",
212 Bus, SubBus, AgentId, Function);
214 node = kmalloc(sizeof(struct device_node), GFP_KERNEL);
217 memset(node, 0, sizeof(struct device_node));
218 pdn = kzalloc(sizeof(*pdn), GFP_KERNEL);
225 list_add_tail(&pdn->Device_List, &iSeries_Global_Device_List);
227 pdn->bussubno = SubBus;
228 pdn->devfn = PCI_DEVFN(ISERIES_ENCODE_DEVICE(AgentId), Function);
233 * unsigned long __init find_and_init_phbs(void)
236 * This function checks for all possible system PCI host bridges that connect
237 * PCI buses. The system hypervisor is queried as to the guest partition
238 * ownership status. A pci_controller is built for any bus which is partially
239 * owned or fully owned by this guest partition.
241 unsigned long __init find_and_init_phbs(void)
243 struct pci_controller *phb;
246 PPCDBG(PPCDBG_BUSWALK, "find_and_init_phbs Entry\n");
248 /* Check all possible buses. */
249 for (bus = 0; bus < 256; bus++) {
250 int ret = HvCallXm_testBus(bus);
252 printk("bus %d appears to exist\n", bus);
254 phb = (struct pci_controller *)kmalloc(sizeof(struct pci_controller), GFP_KERNEL);
257 pci_setup_pci_controller(phb);
259 phb->pci_mem_offset = phb->local_number = bus;
260 phb->first_busno = bus;
261 phb->last_busno = bus;
262 phb->ops = &iSeries_pci_ops;
264 PPCDBG(PPCDBG_BUSWALK, "PCI:Create iSeries pci_controller(%p), Bus: %04X\n",
267 /* Find and connect the devices. */
271 * Check for Unexpected Return code, a clue that something
274 else if (ret != 0x0301)
275 printk(KERN_ERR "Unexpected Return on Probe(0x%04X): 0x%04X",
282 * iSeries_pcibios_init
284 * Chance to initialize and structures or variable before PCI Bus walk.
286 void iSeries_pcibios_init(void)
288 PPCDBG(PPCDBG_BUSWALK, "iSeries_pcibios_init Entry.\n");
289 iomm_table_initialize();
290 find_and_init_phbs();
292 PPCDBG(PPCDBG_BUSWALK, "iSeries_pcibios_init Exit.\n");
296 * iSeries_pci_final_fixup(void)
298 void __init iSeries_pci_final_fixup(void)
300 struct pci_dev *pdev = NULL;
301 struct device_node *node;
304 PPCDBG(PPCDBG_BUSWALK, "iSeries_pcibios_fixup Entry.\n");
306 /* Fix up at the device node and pci_dev relationship */
307 mf_display_src(0xC9000100);
309 printk("pcibios_final_fixup\n");
310 for_each_pci_dev(pdev) {
311 node = find_Device_Node(pdev->bus->number, pdev->devfn);
312 printk("pci dev %p (%x.%x), node %p\n", pdev,
313 pdev->bus->number, pdev->devfn, node);
317 pdev->sysdata = (void *)node;
318 PCI_DN(node)->pcidev = pdev;
319 PPCDBG(PPCDBG_BUSWALK,
320 "pdev 0x%p <==> DevNode 0x%p\n",
322 allocate_device_bars(pdev);
323 iSeries_Device_Information(pdev, DeviceCount);
324 iommu_devnode_init_iSeries(node);
326 printk("PCI: Device Tree not found for 0x%016lX\n",
327 (unsigned long)pdev);
328 pdev->irq = PCI_DN(node)->Irq;
330 iSeries_activate_IRQs();
331 mf_display_src(0xC9000200);
334 void pcibios_fixup_bus(struct pci_bus *PciBus)
336 PPCDBG(PPCDBG_BUSWALK, "iSeries_pcibios_fixup_bus(0x%04X) Entry.\n",
340 void pcibios_fixup_resources(struct pci_dev *pdev)
342 PPCDBG(PPCDBG_BUSWALK, "fixup_resources pdev %p\n", pdev);
346 * Loop through each node function to find usable EADs bridges.
348 static void scan_PHB_slots(struct pci_controller *Phb)
350 struct HvCallPci_DeviceInfo *DevInfo;
351 HvBusNumber bus = Phb->local_number; /* System Bus */
352 const HvSubBusNumber SubBus = 0; /* EADs is always 0. */
355 const int MaxAgents = 8;
357 DevInfo = (struct HvCallPci_DeviceInfo*)
358 kmalloc(sizeof(struct HvCallPci_DeviceInfo), GFP_KERNEL);
363 * Probe for EADs Bridges
365 for (IdSel = 1; IdSel < MaxAgents; ++IdSel) {
366 HvRc = HvCallPci_getDeviceInfo(bus, SubBus, IdSel,
367 iseries_hv_addr(DevInfo),
368 sizeof(struct HvCallPci_DeviceInfo));
370 if (DevInfo->deviceType == HvCallPci_NodeDevice)
371 scan_EADS_bridge(bus, SubBus, IdSel);
373 printk("PCI: Invalid System Configuration(0x%02X)"
374 " for bus 0x%02x id 0x%02x.\n",
375 DevInfo->deviceType, bus, IdSel);
378 pci_Log_Error("getDeviceInfo", bus, SubBus, IdSel, HvRc);
383 static void scan_EADS_bridge(HvBusNumber bus, HvSubBusNumber SubBus,
386 struct HvCallPci_BridgeInfo *BridgeInfo;
391 BridgeInfo = (struct HvCallPci_BridgeInfo *)
392 kmalloc(sizeof(struct HvCallPci_BridgeInfo), GFP_KERNEL);
393 if (BridgeInfo == NULL)
396 /* Note: hvSubBus and irq is always be 0 at this level! */
397 for (Function = 0; Function < 8; ++Function) {
398 AgentId = ISERIES_PCI_AGENTID(IdSel, Function);
399 HvRc = HvCallXm_connectBusUnit(bus, SubBus, AgentId, 0);
401 printk("found device at bus %d idsel %d func %d (AgentId %x)\n",
402 bus, IdSel, Function, AgentId);
403 /* Connect EADs: 0x18.00.12 = 0x00 */
404 PPCDBG(PPCDBG_BUSWALK,
405 "PCI:Connect EADs: 0x%02X.%02X.%02X\n",
406 bus, SubBus, AgentId);
407 HvRc = HvCallPci_getBusUnitInfo(bus, SubBus, AgentId,
408 iseries_hv_addr(BridgeInfo),
409 sizeof(struct HvCallPci_BridgeInfo));
411 printk("bridge info: type %x subbus %x maxAgents %x maxsubbus %x logslot %x\n",
412 BridgeInfo->busUnitInfo.deviceType,
413 BridgeInfo->subBusNumber,
414 BridgeInfo->maxAgents,
415 BridgeInfo->maxSubBusNumber,
416 BridgeInfo->logicalSlotNumber);
417 PPCDBG(PPCDBG_BUSWALK,
418 "PCI: BridgeInfo, Type:0x%02X, SubBus:0x%02X, MaxAgents:0x%02X, MaxSubBus: 0x%02X, LSlot: 0x%02X\n",
419 BridgeInfo->busUnitInfo.deviceType,
420 BridgeInfo->subBusNumber,
421 BridgeInfo->maxAgents,
422 BridgeInfo->maxSubBusNumber,
423 BridgeInfo->logicalSlotNumber);
425 if (BridgeInfo->busUnitInfo.deviceType ==
426 HvCallPci_BridgeDevice) {
427 /* Scan_Bridge_Slot...: 0x18.00.12 */
428 scan_bridge_slot(bus, BridgeInfo);
430 printk("PCI: Invalid Bridge Configuration(0x%02X)",
431 BridgeInfo->busUnitInfo.deviceType);
433 } else if (HvRc != 0x000B)
434 pci_Log_Error("EADs Connect",
435 bus, SubBus, AgentId, HvRc);
441 * This assumes that the node slot is always on the primary bus!
443 static int scan_bridge_slot(HvBusNumber Bus,
444 struct HvCallPci_BridgeInfo *BridgeInfo)
446 struct device_node *node;
447 HvSubBusNumber SubBus = BridgeInfo->subBusNumber;
451 int IdSel = ISERIES_GET_DEVICE_FROM_SUBBUS(SubBus);
452 int Function = ISERIES_GET_FUNCTION_FROM_SUBBUS(SubBus);
453 HvAgentId EADsIdSel = ISERIES_PCI_AGENTID(IdSel, Function);
455 /* iSeries_allocate_IRQ.: 0x18.00.12(0xA3) */
456 Irq = iSeries_allocate_IRQ(Bus, 0, EADsIdSel);
457 PPCDBG(PPCDBG_BUSWALK,
458 "PCI:- allocate and assign IRQ 0x%02X.%02X.%02X = 0x%02X\n",
459 Bus, 0, EADsIdSel, Irq);
462 * Connect all functions of any device found.
464 for (IdSel = 1; IdSel <= BridgeInfo->maxAgents; ++IdSel) {
465 for (Function = 0; Function < 8; ++Function) {
466 HvAgentId AgentId = ISERIES_PCI_AGENTID(IdSel, Function);
467 HvRc = HvCallXm_connectBusUnit(Bus, SubBus,
470 pci_Log_Error("Connect Bus Unit",
471 Bus, SubBus, AgentId, HvRc);
475 HvRc = HvCallPci_configLoad16(Bus, SubBus, AgentId,
476 PCI_VENDOR_ID, &VendorId);
478 pci_Log_Error("Read Vendor",
479 Bus, SubBus, AgentId, HvRc);
482 printk("read vendor ID: %x\n", VendorId);
484 /* FoundDevice: 0x18.28.10 = 0x12AE */
485 PPCDBG(PPCDBG_BUSWALK,
486 "PCI:- FoundDevice: 0x%02X.%02X.%02X = 0x%04X, irq %d\n",
487 Bus, SubBus, AgentId, VendorId, Irq);
488 HvRc = HvCallPci_configStore8(Bus, SubBus, AgentId,
489 PCI_INTERRUPT_LINE, Irq);
491 pci_Log_Error("PciCfgStore Irq Failed!",
492 Bus, SubBus, AgentId, HvRc);
495 node = build_device_node(Bus, SubBus, EADsIdSel, Function);
496 PCI_DN(node)->Irq = Irq;
497 PCI_DN(node)->LogicalSlot = BridgeInfo->logicalSlotNumber;
499 } /* for (Function = 0; Function < 8; ++Function) */
500 } /* for (IdSel = 1; IdSel <= MaxAgents; ++IdSel) */
505 * I/0 Memory copy MUST use mmio commands on iSeries
506 * To do; For performance, include the hv call directly
508 void iSeries_memset_io(volatile void __iomem *dest, char c, size_t Count)
511 long NumberOfBytes = Count;
513 while (NumberOfBytes > 0) {
514 iSeries_Write_Byte(ByteValue, dest++);
518 EXPORT_SYMBOL(iSeries_memset_io);
520 void iSeries_memcpy_toio(volatile void __iomem *dest, void *source, size_t count)
523 long NumberOfBytes = count;
525 while (NumberOfBytes > 0) {
526 iSeries_Write_Byte(*src++, dest++);
530 EXPORT_SYMBOL(iSeries_memcpy_toio);
532 void iSeries_memcpy_fromio(void *dest, const volatile void __iomem *src, size_t count)
535 long NumberOfBytes = count;
537 while (NumberOfBytes > 0) {
538 *dst++ = iSeries_Read_Byte(src++);
542 EXPORT_SYMBOL(iSeries_memcpy_fromio);
545 * Look down the chain to find the matching Device Device
547 static struct device_node *find_Device_Node(int bus, int devfn)
551 list_for_each_entry(pdn, &iSeries_Global_Device_List, Device_List) {
552 if ((bus == pdn->busno) && (devfn == pdn->devfn))
560 * Returns the device node for the passed pci_dev
561 * Sanity Check Node PciDev to passed pci_dev
562 * If none is found, returns a NULL which the client must handle.
564 static struct device_node *get_Device_Node(struct pci_dev *pdev)
566 struct device_node *node;
568 node = pdev->sysdata;
569 if (node == NULL || PCI_DN(node)->pcidev != pdev)
570 node = find_Device_Node(pdev->bus->number, pdev->devfn);
576 * Config space read and write functions.
577 * For now at least, we look for the device node for the bus and devfn
578 * that we are asked to access. It may be possible to translate the devfn
579 * to a subbus and deviceid more directly.
581 static u64 hv_cfg_read_func[4] = {
582 HvCallPciConfigLoad8, HvCallPciConfigLoad16,
583 HvCallPciConfigLoad32, HvCallPciConfigLoad32
586 static u64 hv_cfg_write_func[4] = {
587 HvCallPciConfigStore8, HvCallPciConfigStore16,
588 HvCallPciConfigStore32, HvCallPciConfigStore32
592 * Read PCI config space
594 static int iSeries_pci_read_config(struct pci_bus *bus, unsigned int devfn,
595 int offset, int size, u32 *val)
597 struct device_node *node = find_Device_Node(bus->number, devfn);
599 struct HvCallPci_LoadReturn ret;
602 return PCIBIOS_DEVICE_NOT_FOUND;
605 return PCIBIOS_BAD_REGISTER_NUMBER;
608 fn = hv_cfg_read_func[(size - 1) & 3];
609 HvCall3Ret16(fn, &ret, iseries_ds_addr(node), offset, 0);
613 return PCIBIOS_DEVICE_NOT_FOUND; /* or something */
621 * Write PCI config space
624 static int iSeries_pci_write_config(struct pci_bus *bus, unsigned int devfn,
625 int offset, int size, u32 val)
627 struct device_node *node = find_Device_Node(bus->number, devfn);
632 return PCIBIOS_DEVICE_NOT_FOUND;
634 return PCIBIOS_BAD_REGISTER_NUMBER;
636 fn = hv_cfg_write_func[(size - 1) & 3];
637 ret = HvCall4(fn, iseries_ds_addr(node), offset, val, 0);
640 return PCIBIOS_DEVICE_NOT_FOUND;
645 static struct pci_ops iSeries_pci_ops = {
646 .read = iSeries_pci_read_config,
647 .write = iSeries_pci_write_config
652 * -> On Failure, print and log information.
653 * Increment Retry Count, if exceeds max, panic partition.
655 * PCI: Device 23.90 ReadL I/O Error( 0): 0x1234
656 * PCI: Device 23.90 ReadL Retry( 1)
657 * PCI: Device 23.90 ReadL Retry Successful(1)
659 static int CheckReturnCode(char *TextHdr, struct device_node *DevNode,
663 struct pci_dn *pdn = PCI_DN(DevNode);
667 printk("PCI: %s: Device 0x%04X:%02X I/O Error(%2d): 0x%04X\n",
668 TextHdr, pdn->busno, pdn->devfn,
671 * Bump the retry and check for retry count exceeded.
672 * If, Exceeded, panic the system.
674 if (((*retry) > Pci_Retry_Max) &&
675 (Pci_Error_Flag > 0)) {
676 mf_display_src(0xB6000103);
678 panic("PCI: Hardware I/O Error, SRC B6000103, "
679 "Automatic Reboot Disabled.\n");
681 return -1; /* Retry Try */
687 * Translate the I/O Address into a device node, bar, and bar offset.
688 * Note: Make sure the passed variable end up on the stack to avoid
689 * the exposure of being device global.
691 static inline struct device_node *xlate_iomm_address(
692 const volatile void __iomem *IoAddress,
693 u64 *dsaptr, u64 *BarOffsetPtr)
695 unsigned long OrigIoAddr;
696 unsigned long BaseIoAddr;
697 unsigned long TableIndex;
698 struct device_node *DevNode;
700 OrigIoAddr = (unsigned long __force)IoAddress;
701 if ((OrigIoAddr < BASE_IO_MEMORY) || (OrigIoAddr >= max_io_memory))
703 BaseIoAddr = OrigIoAddr - BASE_IO_MEMORY;
704 TableIndex = BaseIoAddr / IOMM_TABLE_ENTRY_SIZE;
705 DevNode = iomm_table[TableIndex];
707 if (DevNode != NULL) {
708 int barnum = iobar_table[TableIndex];
709 *dsaptr = iseries_ds_addr(DevNode) | (barnum << 24);
710 *BarOffsetPtr = BaseIoAddr % IOMM_TABLE_ENTRY_SIZE;
712 panic("PCI: Invalid PCI IoAddress detected!\n");
717 * Read MM I/O Instructions for the iSeries
718 * On MM I/O error, all ones are returned and iSeries_pci_IoError is cal
719 * else, data is returned in big Endian format.
721 * iSeries_Read_Byte = Read Byte ( 8 bit)
722 * iSeries_Read_Word = Read Word (16 bit)
723 * iSeries_Read_Long = Read Long (32 bit)
725 u8 iSeries_Read_Byte(const volatile void __iomem *IoAddress)
730 struct HvCallPci_LoadReturn ret;
731 struct device_node *DevNode =
732 xlate_iomm_address(IoAddress, &dsa, &BarOffset);
734 if (DevNode == NULL) {
735 static unsigned long last_jiffies;
736 static int num_printed;
738 if ((jiffies - last_jiffies) > 60 * HZ) {
739 last_jiffies = jiffies;
742 if (num_printed++ < 10)
743 printk(KERN_ERR "iSeries_Read_Byte: invalid access at IO address %p\n", IoAddress);
748 HvCall3Ret16(HvCallPciBarLoad8, &ret, dsa, BarOffset, 0);
749 } while (CheckReturnCode("RDB", DevNode, &retry, ret.rc) != 0);
751 return (u8)ret.value;
753 EXPORT_SYMBOL(iSeries_Read_Byte);
755 u16 iSeries_Read_Word(const volatile void __iomem *IoAddress)
760 struct HvCallPci_LoadReturn ret;
761 struct device_node *DevNode =
762 xlate_iomm_address(IoAddress, &dsa, &BarOffset);
764 if (DevNode == NULL) {
765 static unsigned long last_jiffies;
766 static int num_printed;
768 if ((jiffies - last_jiffies) > 60 * HZ) {
769 last_jiffies = jiffies;
772 if (num_printed++ < 10)
773 printk(KERN_ERR "iSeries_Read_Word: invalid access at IO address %p\n", IoAddress);
778 HvCall3Ret16(HvCallPciBarLoad16, &ret, dsa,
780 } while (CheckReturnCode("RDW", DevNode, &retry, ret.rc) != 0);
782 return swab16((u16)ret.value);
784 EXPORT_SYMBOL(iSeries_Read_Word);
786 u32 iSeries_Read_Long(const volatile void __iomem *IoAddress)
791 struct HvCallPci_LoadReturn ret;
792 struct device_node *DevNode =
793 xlate_iomm_address(IoAddress, &dsa, &BarOffset);
795 if (DevNode == NULL) {
796 static unsigned long last_jiffies;
797 static int num_printed;
799 if ((jiffies - last_jiffies) > 60 * HZ) {
800 last_jiffies = jiffies;
803 if (num_printed++ < 10)
804 printk(KERN_ERR "iSeries_Read_Long: invalid access at IO address %p\n", IoAddress);
809 HvCall3Ret16(HvCallPciBarLoad32, &ret, dsa,
811 } while (CheckReturnCode("RDL", DevNode, &retry, ret.rc) != 0);
813 return swab32((u32)ret.value);
815 EXPORT_SYMBOL(iSeries_Read_Long);
818 * Write MM I/O Instructions for the iSeries
820 * iSeries_Write_Byte = Write Byte (8 bit)
821 * iSeries_Write_Word = Write Word(16 bit)
822 * iSeries_Write_Long = Write Long(32 bit)
824 void iSeries_Write_Byte(u8 data, volatile void __iomem *IoAddress)
830 struct device_node *DevNode =
831 xlate_iomm_address(IoAddress, &dsa, &BarOffset);
833 if (DevNode == NULL) {
834 static unsigned long last_jiffies;
835 static int num_printed;
837 if ((jiffies - last_jiffies) > 60 * HZ) {
838 last_jiffies = jiffies;
841 if (num_printed++ < 10)
842 printk(KERN_ERR "iSeries_Write_Byte: invalid access at IO address %p\n", IoAddress);
846 ++Pci_Io_Write_Count;
847 rc = HvCall4(HvCallPciBarStore8, dsa, BarOffset, data, 0);
848 } while (CheckReturnCode("WWB", DevNode, &retry, rc) != 0);
850 EXPORT_SYMBOL(iSeries_Write_Byte);
852 void iSeries_Write_Word(u16 data, volatile void __iomem *IoAddress)
858 struct device_node *DevNode =
859 xlate_iomm_address(IoAddress, &dsa, &BarOffset);
861 if (DevNode == NULL) {
862 static unsigned long last_jiffies;
863 static int num_printed;
865 if ((jiffies - last_jiffies) > 60 * HZ) {
866 last_jiffies = jiffies;
869 if (num_printed++ < 10)
870 printk(KERN_ERR "iSeries_Write_Word: invalid access at IO address %p\n", IoAddress);
874 ++Pci_Io_Write_Count;
875 rc = HvCall4(HvCallPciBarStore16, dsa, BarOffset, swab16(data), 0);
876 } while (CheckReturnCode("WWW", DevNode, &retry, rc) != 0);
878 EXPORT_SYMBOL(iSeries_Write_Word);
880 void iSeries_Write_Long(u32 data, volatile void __iomem *IoAddress)
886 struct device_node *DevNode =
887 xlate_iomm_address(IoAddress, &dsa, &BarOffset);
889 if (DevNode == NULL) {
890 static unsigned long last_jiffies;
891 static int num_printed;
893 if ((jiffies - last_jiffies) > 60 * HZ) {
894 last_jiffies = jiffies;
897 if (num_printed++ < 10)
898 printk(KERN_ERR "iSeries_Write_Long: invalid access at IO address %p\n", IoAddress);
902 ++Pci_Io_Write_Count;
903 rc = HvCall4(HvCallPciBarStore32, dsa, BarOffset, swab32(data), 0);
904 } while (CheckReturnCode("WWL", DevNode, &retry, rc) != 0);
906 EXPORT_SYMBOL(iSeries_Write_Long);