patch-2.4.22 linux-2.4.22/arch/ia64/sn/io/pci_bus_cvlink.c

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diff -urN linux-2.4.21/arch/ia64/sn/io/pci_bus_cvlink.c linux-2.4.22/arch/ia64/sn/io/pci_bus_cvlink.c
@@ -1,743 +0,0 @@
-/* $Id$
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 1992 - 1997, 2000-2002 Silicon Graphics, Inc. All rights reserved.
- */
-
-#include <linux/config.h>
-#include <linux/init.h>
-#include <linux/types.h>
-#include <linux/pci.h>
-#include <linux/pci_ids.h>
-#include <linux/sched.h>
-#include <linux/ioport.h>
-#include <asm/sn/types.h>
-#include <asm/sn/hack.h>
-#include <asm/sn/sgi.h>
-#include <asm/sn/io.h>
-#include <asm/sn/driver.h>
-#include <asm/sn/iograph.h>
-#include <asm/param.h>
-#include <asm/sn/pio.h>
-#include <asm/sn/xtalk/xwidget.h>
-#include <asm/sn/sn_private.h>
-#include <asm/sn/addrs.h>
-#include <asm/sn/invent.h>
-#include <asm/sn/hcl.h>
-#include <asm/sn/hcl_util.h>
-#include <asm/sn/intr.h>
-#include <asm/sn/xtalk/xtalkaddrs.h>
-#include <asm/sn/klconfig.h>
-#include <asm/sn/nodepda.h>
-#include <asm/sn/pci/pciio.h>
-#include <asm/sn/pci/pcibr.h>
-#include <asm/sn/pci/pcibr_private.h>
-#include <asm/sn/pci/pci_bus_cvlink.h>
-#include <asm/sn/simulator.h>
-#include <asm/sn/sn_cpuid.h>
-
-extern int bridge_rev_b_data_check_disable;
-
-devfs_handle_t busnum_to_pcibr_vhdl[MAX_PCI_XWIDGET];
-nasid_t busnum_to_nid[MAX_PCI_XWIDGET];
-void * busnum_to_atedmamaps[MAX_PCI_XWIDGET];
-unsigned char num_bridges;
-static int done_probing = 0;
-
-static int pci_bus_map_create(devfs_handle_t xtalk);
-devfs_handle_t devfn_to_vertex(unsigned char busnum, unsigned int devfn);
-
-#define SN_IOPORTS_UNIT 256
-#define MAX_IOPORTS 0xffff
-#define MAX_IOPORTS_CHUNKS (MAX_IOPORTS / SN_IOPORTS_UNIT)
-struct ioports_to_tlbs_s ioports_to_tlbs[MAX_IOPORTS_CHUNKS];
-unsigned long sn_allocate_ioports(unsigned long pci_address);
-
-extern void sn_init_irq_desc(void);
-
-
-
-/*
- * pci_bus_cvlink_init() - To be called once during initialization before 
- *	SGI IO Infrastructure init is called.
- */
-void
-pci_bus_cvlink_init(void)
-{
-	memset(busnum_to_pcibr_vhdl, 0x0, sizeof(devfs_handle_t) * MAX_PCI_XWIDGET);
-	memset(busnum_to_nid, 0x0, sizeof(nasid_t) * MAX_PCI_XWIDGET);
-
-	memset(busnum_to_atedmamaps, 0x0, sizeof(void *) * MAX_PCI_XWIDGET);
-
-	memset(ioports_to_tlbs, 0x0, sizeof(ioports_to_tlbs));
-
-	num_bridges = 0;
-}
-
-/*
- * pci_bus_to_vertex() - Given a logical Linux Bus Number returns the associated 
- *	pci bus vertex from the SGI IO Infrastructure.
- */
-devfs_handle_t
-pci_bus_to_vertex(unsigned char busnum)
-{
-
-	devfs_handle_t	pci_bus = NULL;
-
-
-	/*
-	 * First get the xwidget vertex.
-	 */
-	pci_bus = busnum_to_pcibr_vhdl[busnum];
-	return(pci_bus);
-}
-
-/*
- * devfn_to_vertex() - returns the vertex of the device given the bus, slot, 
- *	and function numbers.
- */
-devfs_handle_t
-devfn_to_vertex(unsigned char busnum, unsigned int devfn)
-{
-
-	int slot = 0;
-	int func = 0;
-	char	name[16];
-	devfs_handle_t  pci_bus = NULL;
-	devfs_handle_t	device_vertex = (devfs_handle_t)NULL;
-
-	/*
-	 * Go get the pci bus vertex.
-	 */
-	pci_bus = pci_bus_to_vertex(busnum);
-	if (!pci_bus) {
-		/*
-		 * During probing, the Linux pci code invents non-existent
-		 * bus numbers and pci_dev structures and tries to access
-		 * them to determine existence. Don't crib during probing.
-		 */
-		if (done_probing)
-			printk("devfn_to_vertex: Invalid bus number %d given.\n", busnum);
-		return(NULL);
-	}
-
-
-	/*
-	 * Go get the slot&function vertex.
-	 * Should call pciio_slot_func_to_name() when ready.
-	 */
-	slot = PCI_SLOT(devfn);
-	func = PCI_FUNC(devfn);
-
-	/*
-	 * For a NON Multi-function card the name of the device looks like:
-	 * ../pci/1, ../pci/2 ..
-	 */
-	if (func == 0) {
-        	sprintf(name, "%d", slot);
-		if (hwgraph_traverse(pci_bus, name, &device_vertex) == 
-			GRAPH_SUCCESS) {
-			if (device_vertex) {
-				return(device_vertex);
-			}
-		}
-	}
-			
-	/*
-	 * This maybe a multifunction card.  It's names look like:
-	 * ../pci/1a, ../pci/1b, etc.
-	 */
-	sprintf(name, "%d%c", slot, 'a'+func);
-	if (hwgraph_traverse(pci_bus, name, &device_vertex) != GRAPH_SUCCESS) {
-		if (!device_vertex) {
-			return(NULL);
-		}
-	}
-
-	return(device_vertex);
-}
-
-/*
- * For the given device, initialize the addresses for both the Device(x) Flush 
- * Write Buffer register and the Xbow Flush Register for the port the PCI bus 
- * is connected.
- */
-static void
-set_flush_addresses(struct pci_dev *device_dev, 
-	struct sn_device_sysdata *device_sysdata)
-{
-	pciio_info_t pciio_info = pciio_info_get(device_sysdata->vhdl);
-	pciio_slot_t pciio_slot = pciio_info_slot_get(pciio_info);
-	pcibr_soft_t pcibr_soft = (pcibr_soft_t) pciio_info_mfast_get(pciio_info);
-    	bridge_t               *bridge = pcibr_soft->bs_base;
-
-	device_sysdata->dma_buf_sync = (volatile unsigned int *) 
-		&(bridge->b_wr_req_buf[pciio_slot].reg);
-	device_sysdata->xbow_buf_sync = (volatile unsigned int *)
-		XBOW_PRIO_LINKREGS_PTR(NODE_SWIN_BASE(get_nasid(), 0), 
-		pcibr_soft->bs_xid);
-#ifdef DEBUG
-
-	printk("set_flush_addresses: dma_buf_sync %p xbow_buf_sync %p\n", 
-		device_sysdata->dma_buf_sync, device_sysdata->xbow_buf_sync);
-
-	while((volatile unsigned int )*device_sysdata->dma_buf_sync);
-	while((volatile unsigned int )*device_sysdata->xbow_buf_sync);
-#endif
-
-}
-
-/*
- * Most drivers currently do not properly tell the arch specific pci dma
- * interfaces whether they can handle A64. Here is where we privately
- * keep track of this.
- */
-static void __init
-set_sn_pci64(struct pci_dev *dev)
-{
-	unsigned short vendor = dev->vendor;
-	unsigned short device = dev->device;
-
-	if (vendor == PCI_VENDOR_ID_QLOGIC) {
-		if ((device == PCI_DEVICE_ID_QLOGIC_ISP2100) ||
-				(device == PCI_DEVICE_ID_QLOGIC_ISP2200)) {
-			SET_PCIA64(dev);
-			return;
-		}
-	}
-
-	if (vendor == PCI_VENDOR_ID_SGI) {
-		if (device == PCI_DEVICE_ID_SGI_IOC3) {
-			SET_PCIA64(dev);
-			return;
-		}
-	}
-
-}
-
-/*
- * sn_allocate_ioports() - This routine provides the allocation and 
- *	mappings between Linux style IOPORTs management.
- *
- *	For simplicity sake, SN1 will allocate IOPORTs in chunks of 
- *	256bytes .. irrespective of what the card desires.  This may 
- *	have to change when we understand how to deal with legacy ioports 
- *	which are hardcoded in some drivers e.g. SVGA.
- *
- *	Ofcourse, the SN1 IO Infrastructure has no concept of IOPORT numbers.
- *	It will remain so.  The IO Infrastructure will continue to map 
- *	IO Resource just like IRIX.  When this is done, we map IOPORT 
- *	chunks to these resources.  The Linux drivers will see and use real 
- *	IOPORT numbers.  The various IOPORT access macros e.g. inb/outb etc. 
- *	does the munging of these IOPORT numbers to make a Uncache Virtual 
- *	Address.  This address via the tlb entries generates the PCI Address 
- *	allocated by the SN1 IO Infrastructure Layer.
- */
-static unsigned long sn_ioport_num = 0x1000; /* Reserve room for Legacy stuff */
-unsigned long
-sn_allocate_ioports(unsigned long pci_address)
-{
-	
-	unsigned long ioport_index;
-
-	/*
-	 * Just some idiot checking ..
-	 */
-	if ( sn_ioport_num > 0xffff ) {
-		printk("sn_allocate_ioports: No more IO PORTS available\n");
-		return(-1);
-	}
-
-	/*
-	 * See Section 4.1.1.5 of Intel IA-64 Acrchitecture Software Developer's
-	 * Manual for details.
-	 */
-	ioport_index = sn_ioport_num / SN_IOPORTS_UNIT;
-
-	ioports_to_tlbs[ioport_index].p = 1; /* Present Bit */
-	ioports_to_tlbs[ioport_index].rv_1 = 0; /* 1 Bit */
-	ioports_to_tlbs[ioport_index].ma = 4; /* Memory Attributes 3 bits*/
-	ioports_to_tlbs[ioport_index].a = 1; /* Set Data Access Bit Fault 1 Bit*/
-	ioports_to_tlbs[ioport_index].d = 1; /* Dirty Bit */
-	ioports_to_tlbs[ioport_index].pl = 0;/* Privilege Level - All levels can R/W*/
-	ioports_to_tlbs[ioport_index].ar = 3; /* Access Rights - R/W only*/
-	ioports_to_tlbs[ioport_index].ppn = pci_address >> 12; /* 4K page size */
-	ioports_to_tlbs[ioport_index].ed = 0; /* Exception Deferral Bit */
-	ioports_to_tlbs[ioport_index].ig = 0; /* Ignored */
-
-	/* printk("sn_allocate_ioports: ioport_index 0x%x ioports_to_tlbs 0x%p\n", ioport_index, ioports_to_tlbs[ioport_index]); */
-	
-	sn_ioport_num += SN_IOPORTS_UNIT;
-
-	return(sn_ioport_num - SN_IOPORTS_UNIT);
-}
-
-/*
- * sn_pci_fixup() - This routine is called when platform_pci_fixup() is 
- *	invoked at the end of pcibios_init() to link the Linux pci 
- *	infrastructure to SGI IO Infrasturcture - ia64/kernel/pci.c
- *
- *	Other platform specific fixup can also be done here.
- */
-void
-sn_pci_fixup(int arg)
-{
-	struct list_head *ln;
-	struct pci_bus *pci_bus = NULL;
-	struct pci_dev *device_dev = NULL;
-	struct sn_widget_sysdata *widget_sysdata;
-	struct sn_device_sysdata *device_sysdata;
-#ifdef SN_IOPORTS
-	unsigned long ioport;
-#endif
-	pciio_intr_t intr_handle;
-	int cpuid, bit;
-	devfs_handle_t device_vertex;
-	pciio_intr_line_t lines;
-	extern void sn_pci_find_bios(void);
-#ifdef CONFIG_IA64_SGI_SN2
-	extern int numnodes;
-	int cnode;
-#endif /* CONFIG_IA64_SGI_SN2 */
-
-
-	if (arg == 0) {
-		sn_init_irq_desc();
-		sn_pci_find_bios();
-#ifdef CONFIG_IA64_SGI_SN2
-		for (cnode = 0; cnode < numnodes; cnode++) {
-				extern void intr_init_vecblk(nodepda_t *npda, cnodeid_t, int);
-				intr_init_vecblk(NODEPDA(cnode), cnode, 0);
-		} 
-#endif /* CONFIG_IA64_SGI_SN2 */
-		return;
-	}
-
-#if 0
-{
-        devfs_handle_t  bridge_vhdl = pci_bus_to_vertex(0);
-        pcibr_soft_t    pcibr_soft = (pcibr_soft_t) hwgraph_fastinfo_get(bridge_vhdl);
-	bridge_t        *bridge = pcibr_soft->bs_base;
-        printk("pci_fixup_ioc3: Before devreg fixup\n");
-        printk("pci_fixup_ioc3: Devreg 0 0x%x\n", bridge->b_device[0].reg);
-        printk("pci_fixup_ioc3: Devreg 1 0x%x\n", bridge->b_device[1].reg);
-        printk("pci_fixup_ioc3: Devreg 2 0x%x\n", bridge->b_device[2].reg);
-        printk("pci_fixup_ioc3: Devreg 3 0x%x\n", bridge->b_device[3].reg);
-        printk("pci_fixup_ioc3: Devreg 4 0x%x\n", bridge->b_device[4].reg);
-        printk("pci_fixup_ioc3: Devreg 5 0x%x\n", bridge->b_device[5].reg);
-        printk("pci_fixup_ioc3: Devreg 6 0x%x\n", bridge->b_device[6].reg);
-        printk("pci_fixup_ioc3: Devreg 7 0x%x\n", bridge->b_device[7].reg);
-}
-#endif
-	done_probing = 1;
-
-	/*
-	 * Initialize the pci bus vertex in the pci_bus struct.
-	 */
-	for( ln = pci_root_buses.next; ln != &pci_root_buses; ln = ln->next) {
-		pci_bus = pci_bus_b(ln);
-		widget_sysdata = kmalloc(sizeof(struct sn_widget_sysdata), 
-					GFP_KERNEL);
-		widget_sysdata->vhdl = pci_bus_to_vertex(pci_bus->number);
-		pci_bus->sysdata = (void *)widget_sysdata;
-	}
-
-	/*
- 	 * set the root start and end so that drivers calling check_region()
-	 * won't see a conflict
-	 */
-#ifdef SN_IOPORTS
-	ioport_resource.start  = sn_ioport_num;
-	ioport_resource.end = 0xffff;
-#else
-#if defined(CONFIG_IA64_SGI_SN1)
-	if ( IS_RUNNING_ON_SIMULATOR() ) {
-		/*
-		 * IDE legacy IO PORTs are supported in Medusa.
-		 * Just open up IO PORTs from 0 .. ioport_resource.end.
-		 */
-		ioport_resource.start = 0;
-	} else {
-		/*
-		 * We do not support Legacy IO PORT numbers.
-		 */
-		ioport_resource.start |= IO_SWIZ_BASE | __IA64_UNCACHED_OFFSET;
-	}
-	ioport_resource.end |= (HSPEC_SWIZ_BASE-1) | __IA64_UNCACHED_OFFSET;
-#else
-	// Need something here for sn2.... ZXZXZX
-#endif
-#endif
-
-	/*
-	 * Set the root start and end for Mem Resource.
-	 */
-	iomem_resource.start = 0;
-	iomem_resource.end = 0xffffffffffffffff;
-
-	/*
-	 * Initialize the device vertex in the pci_dev struct.
-	 */
-	pci_for_each_dev(device_dev) {
-		unsigned int irq;
-		int idx;
-		u16 cmd;
-		devfs_handle_t vhdl;
-		unsigned long size;
-		extern int bit_pos_to_irq(int);
-
-		if (device_dev->vendor == PCI_VENDOR_ID_SGI &&
-				device_dev->device == PCI_DEVICE_ID_SGI_IOC3) {
-			extern void pci_fixup_ioc3(struct pci_dev *d);
-			pci_fixup_ioc3(device_dev);
-		}
-
-		/* Set the device vertex */
-
-		device_sysdata = kmalloc(sizeof(struct sn_device_sysdata),
-					GFP_KERNEL);
-		device_sysdata->vhdl = devfn_to_vertex(device_dev->bus->number, device_dev->devfn);
-		device_sysdata->isa64 = 0;
-		/*
-		 * Set the xbridge Device(X) Write Buffer Flush and Xbow Flush 
-		 * register addresses.
-		 */
-		(void) set_flush_addresses(device_dev, device_sysdata);
-
-		device_dev->sysdata = (void *) device_sysdata;
-		set_sn_pci64(device_dev);
-		pci_read_config_word(device_dev, PCI_COMMAND, &cmd);
-
-		/*
-		 * Set the resources address correctly.  The assumption here 
-		 * is that the addresses in the resource structure has been
-		 * read from the card and it was set in the card by our
-		 * Infrastructure ..
-		 */
-		vhdl = device_sysdata->vhdl;
-		for (idx = 0; idx < PCI_ROM_RESOURCE; idx++) {
-			size = 0;
-			size = device_dev->resource[idx].end -
-				device_dev->resource[idx].start;
-			if (size) {
-				device_dev->resource[idx].start = (unsigned long)pciio_pio_addr(vhdl, 0, PCIIO_SPACE_WIN(idx), 0, size, 0, PCIIO_BYTE_STREAM);
-				device_dev->resource[idx].start |= __IA64_UNCACHED_OFFSET;
-			}
-			else
-				continue;
-
-			device_dev->resource[idx].end = 
-				device_dev->resource[idx].start + size;
-
-#ifdef CONFIG_IA64_SGI_SN1
-			/*
-			 * Adjust the addresses to go to the SWIZZLE ..
-			 */
-			device_dev->resource[idx].start = 
-				device_dev->resource[idx].start & 0xfffff7ffffffffff;
-			device_dev->resource[idx].end = 
-				device_dev->resource[idx].end & 0xfffff7ffffffffff;
-#endif
-
-			if (device_dev->resource[idx].flags & IORESOURCE_IO) {
-				cmd |= PCI_COMMAND_IO;
-#ifdef SN_IOPORTS
-				ioport = sn_allocate_ioports(device_dev->resource[idx].start);
-				if (ioport < 0) {
-					printk("sn_pci_fixup: PCI Device 0x%x on PCI Bus %d not mapped to IO PORTs .. IO PORTs exhausted\n", device_dev->devfn, device_dev->bus->number);
-					continue;
-				}
-				pciio_config_set(vhdl, (unsigned) PCI_BASE_ADDRESS_0 + (idx * 4), 4, (res + (ioport & 0xfff)));
-
-printk("sn_pci_fixup: ioport number %d mapped to pci address 0x%lx\n", ioport, (res + (ioport & 0xfff)));
-
-				device_dev->resource[idx].start = ioport;
-				device_dev->resource[idx].end = ioport + SN_IOPORTS_UNIT;
-#endif
-			}
-			if (device_dev->resource[idx].flags & IORESOURCE_MEM)
-				cmd |= PCI_COMMAND_MEMORY;
-		}
-		/*
-		 * Now handle the ROM resource ..
-		 */
-		size = device_dev->resource[PCI_ROM_RESOURCE].end -
-			device_dev->resource[PCI_ROM_RESOURCE].start;
-
-		if (size) {
-			device_dev->resource[PCI_ROM_RESOURCE].start =
-			(unsigned long) pciio_pio_addr(vhdl, 0, PCIIO_SPACE_ROM, 0, 
-				size, 0, PCIIO_BYTE_STREAM);
-			device_dev->resource[PCI_ROM_RESOURCE].start |= __IA64_UNCACHED_OFFSET;
-			device_dev->resource[PCI_ROM_RESOURCE].end =
-			device_dev->resource[PCI_ROM_RESOURCE].start + size;
-
-#ifdef CONFIG_IA64_SGI_SN1
-                	/*
-                 	 * go through synergy swizzled space
-                 	 */
-			device_dev->resource[PCI_ROM_RESOURCE].start &= 0xfffff7ffffffffffUL;
-			device_dev->resource[PCI_ROM_RESOURCE].end   &= 0xfffff7ffffffffffUL;
-#endif
-
-		}
-
-		/*
-		 * Update the Command Word on the Card.
-		 */
-		cmd |= PCI_COMMAND_MASTER; /* If the device doesn't support */
-					   /* bit gets dropped .. no harm */
-		pci_write_config_word(device_dev, PCI_COMMAND, cmd);
-
-		pci_read_config_byte(device_dev, PCI_INTERRUPT_PIN, (unsigned char *)&lines);
-		if (device_dev->vendor == PCI_VENDOR_ID_SGI &&
-			device_dev->device == PCI_DEVICE_ID_SGI_IOC3 ) {
-				lines = 1;
-		}
- 
-		device_sysdata = (struct sn_device_sysdata *)device_dev->sysdata;
-		device_vertex = device_sysdata->vhdl;
- 
-		intr_handle = pciio_intr_alloc(device_vertex, NULL, lines, device_vertex);
-
-		bit = intr_handle->pi_irq;
-		cpuid = intr_handle->pi_cpu;
-#ifdef CONFIG_IA64_SGI_SN1
-		irq = bit_pos_to_irq(bit);
-#else /* SN2 */
-		irq = bit;
-#endif
-		irq = irq + (cpuid << 8);
-		pciio_intr_connect(intr_handle);
-		device_dev->irq = irq;
-#ifdef ajmtestintr
-		{
-			int slot = PCI_SLOT(device_dev->devfn);
-			static int timer_set = 0;
-			pcibr_intr_t	pcibr_intr = (pcibr_intr_t)intr_handle;
-			pcibr_soft_t	pcibr_soft = pcibr_intr->bi_soft;
-			extern void intr_test_handle_intr(int, void*, struct pt_regs *);
-
-			if (!timer_set) {
-				intr_test_set_timer();
-				timer_set = 1;
-			}
-			intr_test_register_irq(irq, pcibr_soft, slot);
-			request_irq(irq, intr_test_handle_intr,0,NULL, NULL);
-		}
-#endif
-
-	}
-
-#if 0
-
-{
-        devfs_handle_t  bridge_vhdl = pci_bus_to_vertex(0);
-        pcibr_soft_t    pcibr_soft = (pcibr_soft_t) hwgraph_fastinfo_get(bridge_vhdl);
-        bridge_t        *bridge = pcibr_soft->bs_base;
-
-        printk("pci_fixup_ioc3: Before devreg fixup\n");
-        printk("pci_fixup_ioc3: Devreg 0 0x%x\n", bridge->b_device[0].reg);
-        printk("pci_fixup_ioc3: Devreg 1 0x%x\n", bridge->b_device[1].reg);
-        printk("pci_fixup_ioc3: Devreg 2 0x%x\n", bridge->b_device[2].reg);
-        printk("pci_fixup_ioc3: Devreg 3 0x%x\n", bridge->b_device[3].reg);
-        printk("pci_fixup_ioc3: Devreg 4 0x%x\n", bridge->b_device[4].reg);
-        printk("pci_fixup_ioc3: Devreg 5 0x%x\n", bridge->b_device[5].reg);
-        printk("pci_fixup_ioc3: Devreg 6 0x%x\n", bridge->b_device[6].reg);
-        printk("pci_fixup_ioc3: Devreg 7 0x%x\n", bridge->b_device[7].reg);
-}
-
-printk("testing Big Window: 0xC0000200c0000000 %p\n", *( (volatile uint64_t *)0xc0000200a0000000));
-printk("testing Big Window: 0xC0000200c0000008 %p\n", *( (volatile uint64_t *)0xc0000200a0000008));
-
-#endif
-
-}
-
-/*
- * pci_bus_map_create() - Called by pci_bus_to_hcl_cvlink() to finish the job.
- *
- *	Linux PCI Bus numbers are assigned from lowest module_id numbers
- *	(rack/slot etc.) starting from HUB_WIDGET_ID_MAX down to 
- *	HUB_WIDGET_ID_MIN:
- *		widgetnum 15 gets lower Bus Number than widgetnum 14 etc.
- *
- *	Given 2 modules 001c01 and 001c02 we get the following mappings:
- *		001c01, widgetnum 15 = Bus number 0
- *		001c01, widgetnum 14 = Bus number 1
- *		001c02, widgetnum 15 = Bus number 3
- *		001c02, widgetnum 14 = Bus number 4
- *		etc.
- *
- * The rational for starting Bus Number 0 with Widget number 15 is because 
- * the system boot disks are always connected via Widget 15 Slot 0 of the 
- * I-brick.  Linux creates /dev/sd* devices(naming) strating from Bus Number 0 
- * Therefore, /dev/sda1 will be the first disk, on Widget 15 of the lowest 
- * module id(Master Cnode) of the system.
- *	
- */
-static int 
-pci_bus_map_create(devfs_handle_t xtalk)
-{
-
-	devfs_handle_t master_node_vertex = NULL;
-	devfs_handle_t xwidget = NULL;
-	devfs_handle_t pci_bus = NULL;
-	hubinfo_t hubinfo = NULL;
-	xwidgetnum_t widgetnum;
-	char pathname[128];
-	graph_error_t rv;
-
-	/*
-	 * Loop throught this vertex and get the Xwidgets ..
-	 */
-	for (widgetnum = HUB_WIDGET_ID_MAX; widgetnum >= HUB_WIDGET_ID_MIN; widgetnum--) {
-#if 0
-        {
-                int pos;
-                char dname[256];
-                pos = devfs_generate_path(xtalk, dname, 256);
-                printk("%s : path= %s\n", __FUNCTION__, &dname[pos]);
-        }
-#endif
-
-		sprintf(pathname, "%d", widgetnum);
-		xwidget = NULL;
-		
-		/*
-		 * Example - /hw/module/001c16/Pbrick/xtalk/8 is the xwidget
-		 *	     /hw/module/001c16/Pbrick/xtalk/8/pci/1 is device
-		 */
-		rv = hwgraph_traverse(xtalk, pathname, &xwidget);
-		if ( (rv != GRAPH_SUCCESS) ) {
-			if (!xwidget)
-				continue;
-		}
-
-		sprintf(pathname, "%d/"EDGE_LBL_PCI, widgetnum);
-		pci_bus = NULL;
-		if (hwgraph_traverse(xtalk, pathname, &pci_bus) != GRAPH_SUCCESS)
-			if (!pci_bus)
-				continue;
-
-		/*
-		 * Assign the correct bus number and also the nasid of this 
-		 * pci Xwidget.
-		 * 
-		 * Should not be any race here ...
-		 */
-		num_bridges++;
-		busnum_to_pcibr_vhdl[num_bridges - 1] = pci_bus;
-
-		/*
-		 * Get the master node and from there get the NASID.
-		 */
-		master_node_vertex = device_master_get(xwidget);
-		if (!master_node_vertex) {
-			printk("WARNING: pci_bus_map_create: Unable to get .master for vertex 0x%p\n", (void *)xwidget);
-		}
-	
-		hubinfo_get(master_node_vertex, &hubinfo);
-		if (!hubinfo) {
-			printk("WARNING: pci_bus_map_create: Unable to get hubinfo for master node vertex 0x%p\n", (void *)master_node_vertex);
-			return(1);
-		} else {
-			busnum_to_nid[num_bridges - 1] = hubinfo->h_nasid;
-		}
-
-		/*
-		 * Pre assign DMA maps needed for 32 Bits Page Map DMA.
-		 */
-		busnum_to_atedmamaps[num_bridges - 1] = (void *) kmalloc(
-			sizeof(struct sn_dma_maps_s) * MAX_ATE_MAPS, GFP_KERNEL);
-		if (!busnum_to_atedmamaps[num_bridges - 1])
-			printk("WARNING: pci_bus_map_create: Unable to precreate ATE DMA Maps for busnum %d vertex 0x%p\n", num_bridges - 1, (void *)xwidget);
-
-		memset(busnum_to_atedmamaps[num_bridges - 1], 0x0, 
-			sizeof(struct sn_dma_maps_s) * MAX_ATE_MAPS);
-
-	}
-
-        return(0);
-}
-
-/*
- * pci_bus_to_hcl_cvlink() - This routine is called after SGI IO Infrastructure   
- *      initialization has completed to set up the mappings between Xbridge
- *      and logical pci bus numbers.  We also set up the NASID for each of these
- *      xbridges.
- *
- *      Must be called before pci_init() is invoked.
- */
-int
-pci_bus_to_hcl_cvlink(void) 
-{
-
-	devfs_handle_t devfs_hdl = NULL;
-	devfs_handle_t xtalk = NULL;
-	int rv = 0;
-	char name[256];
-	int master_iobrick;
-	int i;
-
-	/*
-	 * Iterate throught each xtalk links in the system ..
-	 * /hw/module/001c01/node/xtalk/ 8|9|10|11|12|13|14|15 
-	 *
-	 * /hw/module/001c01/node/xtalk/15 -> /hw/module/001c01/Ibrick/xtalk/15
-	 *
-	 * What if it is not pci?
-	 */
-	devfs_hdl = hwgraph_path_to_vertex("/dev/hw/module");
-
-	/*
-	 * To provide consistent(not persistent) device naming, we need to start 
-	 * bus number allocation from the C-Brick with the lowest module id e.g. 001c01 
-	 * with an attached I-Brick.  Find the master_iobrick.
-	 */
-	master_iobrick = -1;
-	for (i = 0; i < nummodules; i++) {
-		moduleid_t iobrick_id; 
-		iobrick_id = iobrick_module_get(&modules[i]->elsc);
-		if (iobrick_id > 0) { /* Valid module id */
-			if (MODULE_GET_BTYPE(iobrick_id) == MODULE_IBRICK) {
-				master_iobrick = i;
-				break;
-			}
-		}
-	}
-
-	/*
-	 * The master_iobrick gets bus 0 and 1.
-	 */
-	if (master_iobrick >= 0) {
-		memset(name, 0, 256);
-		format_module_id(name, modules[master_iobrick]->id, MODULE_FORMAT_BRIEF);
-		strcat(name, "/node/xtalk");
-		xtalk = NULL;
-		rv = hwgraph_edge_get(devfs_hdl, name, &xtalk);
-		pci_bus_map_create(xtalk);
-	}
-		
-	/*
-	 * Now go do the rest of the modules, starting from the C-Brick with the lowest 
-	 * module id, remembering to skip the master_iobrick, which was done above.
-	 */
-	for (i = 0; i < nummodules; i++) {
-		if (i == master_iobrick) {
-			continue; /* Did the master_iobrick already. */
-		}
-
-		memset(name, 0, 256);
-		format_module_id(name, modules[i]->id, MODULE_FORMAT_BRIEF);
-		strcat(name, "/node/xtalk");
-		xtalk = NULL;
-		rv = hwgraph_edge_get(devfs_hdl, name, &xtalk);
-		pci_bus_map_create(xtalk);
-	}
-
-	return(0);
-}

FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)