io_common.c

linux 内核源代码

{
	int cnode;
	struct pci_controller *controller;
	struct hubdev_info *hubdev_info;
	int nasid;
	void *provider_soft;
	struct sn_pcibus_provider *provider;
	struct sn_platform_data *sn_platform_data;

	controller = PCI_CONTROLLER(bus);
	/*
	 * Per-provider fixup.  Copies the bus soft structure from prom
	 * to local area and links SN_PCIBUS_BUSSOFT().
	 */

	if (prom_bussoft_ptr->bs_asic_type >= PCIIO_ASIC_MAX_TYPES) {
		printk(KERN_WARNING "sn_common_bus_fixup: Unsupported asic type, %d",
		       prom_bussoft_ptr->bs_asic_type);
		return;
	}

	if (prom_bussoft_ptr->bs_asic_type == PCIIO_ASIC_TYPE_PPB)
		return;	/* no further fixup necessary */

	provider = sn_pci_provider[prom_bussoft_ptr->bs_asic_type];
	if (provider == NULL)
		panic("sn_common_bus_fixup: No provider registered for this asic type, %d",
		      prom_bussoft_ptr->bs_asic_type);

	if (provider->bus_fixup)
		provider_soft = (*provider->bus_fixup) (prom_bussoft_ptr,
				 controller);
	else
		provider_soft = NULL;

	/*
	 * Generic bus fixup goes here.  Don't reference prom_bussoft_ptr
	 * after this point.
	 */
	controller->platform_data = kzalloc(sizeof(struct sn_platform_data),
					    GFP_KERNEL);
	if (controller->platform_data == NULL)
		BUG();
	sn_platform_data =
			(struct sn_platform_data *) controller->platform_data;
	sn_platform_data->provider_soft = provider_soft;
	INIT_LIST_HEAD(&((struct sn_platform_data *)
			 controller->platform_data)->pcidev_info);
	nasid = NASID_GET(SN_PCIBUS_BUSSOFT(bus)->bs_base);
	cnode = nasid_to_cnodeid(nasid);
	hubdev_info = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
	SN_PCIBUS_BUSSOFT(bus)->bs_xwidget_info =
	    &(hubdev_info->hdi_xwidget_info[SN_PCIBUS_BUSSOFT(bus)->bs_xid]);

	/*
	 * If the node information we obtained during the fixup phase is
	 * invalid then set controller->node to -1 (undetermined)
	 */
	if (controller->node >= num_online_nodes()) {
		struct pcibus_bussoft *b = SN_PCIBUS_BUSSOFT(bus);

		printk(KERN_WARNING "Device ASIC=%u XID=%u PBUSNUM=%u "
		       "L_IO=%lx L_MEM=%lx BASE=%lx\n",
		       b->bs_asic_type, b->bs_xid, b->bs_persist_busnum,
		       b->bs_legacy_io, b->bs_legacy_mem, b->bs_base);
		printk(KERN_WARNING "on node %d but only %d nodes online."
		       "Association set to undetermined.\n",
		       controller->node, num_online_nodes());
		controller->node = -1;
	}
}

void sn_bus_store_sysdata(struct pci_dev *dev)
{
	struct sysdata_el *element;

	element = kzalloc(sizeof(struct sysdata_el), GFP_KERNEL);
	if (!element) {
		dev_dbg(&dev->dev, "%s: out of memory!\n", __FUNCTION__);
		return;
	}
	element->sysdata = SN_PCIDEV_INFO(dev);
	list_add(&element->entry, &sn_sysdata_list);
}

void sn_bus_free_sysdata(void)
{
	struct sysdata_el *element;
	struct list_head *list, *safe;

	list_for_each_safe(list, safe, &sn_sysdata_list) {
		element = list_entry(list, struct sysdata_el, entry);
		list_del(&element->entry);
		list_del(&(((struct pcidev_info *)
			     (element->sysdata))->pdi_list));
		kfree(element->sysdata);
		kfree(element);
	}
	return;
}

/*
 * hubdev_init_node() - Creates the HUB data structure and link them to it's
 *			own NODE specific data area.
 */
void __init hubdev_init_node(nodepda_t * npda, cnodeid_t node)
{
	struct hubdev_info *hubdev_info;
	int size;
	pg_data_t *pg;

	size = sizeof(struct hubdev_info);

	if (node >= num_online_nodes())	/* Headless/memless IO nodes */
		pg = NODE_DATA(0);
	else
		pg = NODE_DATA(node);

	hubdev_info = (struct hubdev_info *)alloc_bootmem_node(pg, size);

	npda->pdinfo = (void *)hubdev_info;
}

geoid_t
cnodeid_get_geoid(cnodeid_t cnode)
{
	struct hubdev_info *hubdev;

	hubdev = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
	return hubdev->hdi_geoid;
}

void sn_generate_path(struct pci_bus *pci_bus, char *address)
{
	nasid_t nasid;
	cnodeid_t cnode;
	geoid_t geoid;
	moduleid_t moduleid;
	u16 bricktype;

	nasid = NASID_GET(SN_PCIBUS_BUSSOFT(pci_bus)->bs_base);
	cnode = nasid_to_cnodeid(nasid);
	geoid = cnodeid_get_geoid(cnode);
	moduleid = geo_module(geoid);

	sprintf(address, "module_%c%c%c%c%.2d",
		'0'+RACK_GET_CLASS(MODULE_GET_RACK(moduleid)),
		'0'+RACK_GET_GROUP(MODULE_GET_RACK(moduleid)),
		'0'+RACK_GET_NUM(MODULE_GET_RACK(moduleid)),
		MODULE_GET_BTCHAR(moduleid), MODULE_GET_BPOS(moduleid));

	/* Tollhouse requires slot id to be displayed */
	bricktype = MODULE_GET_BTYPE(moduleid);
	if ((bricktype == L1_BRICKTYPE_191010) ||
	    (bricktype == L1_BRICKTYPE_1932))
			sprintf(address, "%s^%d", address, geo_slot(geoid));
}

void __devinit
sn_pci_fixup_bus(struct pci_bus *bus)
{

	if (SN_ACPI_BASE_SUPPORT())
		sn_acpi_bus_fixup(bus);
	else
		sn_bus_fixup(bus);
}

/*
 * sn_io_early_init - Perform early IO (and some non-IO) initialization.
 *		      In particular, setup the sn_pci_provider[] array.
 *		      This needs to be done prior to any bus scanning
 *		      (acpi_scan_init()) in the ACPI case, as the SN
 *		      bus fixup code will reference the array.
 */
static int __init
sn_io_early_init(void)
{
	int i;

	if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
		return 0;

	/* we set the acpi revision to that of the DSDT table OEM rev. */
	{
		struct acpi_table_header *header = NULL;

		acpi_get_table_by_index(ACPI_TABLE_INDEX_DSDT, &header);
		BUG_ON(header == NULL);
		sn_acpi_rev = header->oem_revision;
	}

	/*
	 * prime sn_pci_provider[].  Individual provider init routines will
	 * override their respective default entries.
	 */

	for (i = 0; i < PCIIO_ASIC_MAX_TYPES; i++)
		sn_pci_provider[i] = &sn_pci_default_provider;

	pcibr_init_provider();
	tioca_init_provider();
	tioce_init_provider();

	/*
	 * This is needed to avoid bounce limit checks in the blk layer
	 */
	ia64_max_iommu_merge_mask = ~PAGE_MASK;

	sn_irq_lh_init();
	INIT_LIST_HEAD(&sn_sysdata_list);
	sn_init_cpei_timer();

#ifdef CONFIG_PROC_FS
	register_sn_procfs();
#endif

	{
		struct acpi_table_header *header;
		(void)acpi_get_table_by_index(ACPI_TABLE_INDEX_DSDT, &header);
		printk(KERN_INFO "ACPI  DSDT OEM Rev 0x%x\n",
			header->oem_revision);
	}
	if (SN_ACPI_BASE_SUPPORT())
		sn_io_acpi_init();
	else
		sn_io_init();
	return 0;
}

arch_initcall(sn_io_early_init);

/*
 * sn_io_late_init() - Perform any final platform specific IO initialization.
 */

int __init
sn_io_late_init(void)
{
	struct pci_bus *bus;
	struct pcibus_bussoft *bussoft;
	cnodeid_t cnode;
	nasid_t nasid;
	cnodeid_t near_cnode;

	if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
		return 0;

	/*
	 * Setup closest node in pci_controller->node for
	 * PIC, TIOCP, TIOCE (TIOCA does it during bus fixup using
	 * info from the PROM).
	 */
	bus = NULL;
	while ((bus = pci_find_next_bus(bus)) != NULL) {
		bussoft = SN_PCIBUS_BUSSOFT(bus);
		nasid = NASID_GET(bussoft->bs_base);
		cnode = nasid_to_cnodeid(nasid);
		if ((bussoft->bs_asic_type == PCIIO_ASIC_TYPE_TIOCP) ||
		    (bussoft->bs_asic_type == PCIIO_ASIC_TYPE_TIOCE) ||
		    (bussoft->bs_asic_type == PCIIO_ASIC_TYPE_PIC)) {
			/* PCI Bridge: find nearest node with CPUs */
			int e = sn_hwperf_get_nearest_node(cnode, NULL,
							   &near_cnode);
			if (e < 0) {
				near_cnode = (cnodeid_t)-1; /* use any node */
				printk(KERN_WARNING "sn_io_late_init: failed "
				       "to find near node with CPUs for "
				       "node %d, err=%d\n", cnode, e);
			}
			PCI_CONTROLLER(bus)->node = near_cnode;
		}
	}

	sn_ioif_inited = 1;	/* SN I/O infrastructure now initialized */

	return 0;
}

fs_initcall(sn_io_late_init);

EXPORT_SYMBOL(sn_pci_unfixup_slot);
EXPORT_SYMBOL(sn_bus_store_sysdata);
EXPORT_SYMBOL(sn_bus_free_sysdata);
EXPORT_SYMBOL(sn_generate_path);