1 files changed, 411 insertions, 0 deletions

diff --git a/arch/ia64/sn/kernel/io_init.c b/arch/ia64/sn/kernel/io_init.c
new file mode 100644
index 000000000000..001880812b7c
--- /dev/null
+++ b/arch/ia64/sn/kernel/io_init.c
@@ -0,0 +1,411 @@
+/*
+ * 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, 2000-2004 Silicon Graphics, Inc. All rights reserved.
+ */
+
+#include <linux/bootmem.h>
+#include <linux/nodemask.h>
+#include <asm/sn/types.h>
+#include <asm/sn/sn_sal.h>
+#include <asm/sn/addrs.h>
+#include "pci/pcibus_provider_defs.h"
+#include "pci/pcidev.h"
+#include "pci/pcibr_provider.h"
+#include "xtalk/xwidgetdev.h"
+#include <asm/sn/geo.h>
+#include "xtalk/hubdev.h"
+#include <asm/sn/io.h>
+#include <asm/sn/simulator.h>
+
+char master_baseio_wid;
+nasid_t master_nasid = INVALID_NASID;	/* Partition Master */
+
+struct slab_info {
+	struct hubdev_info hubdev;
+};
+
+struct brick {
+	moduleid_t id;		/* Module ID of this module        */
+	struct slab_info slab_info[MAX_SLABS + 1];
+};
+
+int sn_ioif_inited = 0;		/* SN I/O infrastructure initialized? */
+
+/*
+ * Retrieve the DMA Flush List given nasid.  This list is needed 
+ * to implement the WAR - Flush DMA data on PIO Reads.
+ */
+static inline uint64_t
+sal_get_widget_dmaflush_list(u64 nasid, u64 widget_num, u64 address)
+{
+
+	struct ia64_sal_retval ret_stuff;
+	ret_stuff.status = 0;
+	ret_stuff.v0 = 0;
+
+	SAL_CALL_NOLOCK(ret_stuff,
+			(u64) SN_SAL_IOIF_GET_WIDGET_DMAFLUSH_LIST,
+			(u64) nasid, (u64) widget_num, (u64) address, 0, 0, 0,
+			0);
+	return ret_stuff.v0;
+
+}
+
+/*
+ * Retrieve the hub device info structure for the given nasid.
+ */
+static inline uint64_t sal_get_hubdev_info(u64 handle, u64 address)
+{
+
+	struct ia64_sal_retval ret_stuff;
+	ret_stuff.status = 0;
+	ret_stuff.v0 = 0;
+
+	SAL_CALL_NOLOCK(ret_stuff,
+			(u64) SN_SAL_IOIF_GET_HUBDEV_INFO,
+			(u64) handle, (u64) address, 0, 0, 0, 0, 0);
+	return ret_stuff.v0;
+}
+
+/*
+ * Retrieve the pci bus information given the bus number.
+ */
+static inline uint64_t sal_get_pcibus_info(u64 segment, u64 busnum, u64 address)
+{
+
+	struct ia64_sal_retval ret_stuff;
+	ret_stuff.status = 0;
+	ret_stuff.v0 = 0;
+
+	SAL_CALL_NOLOCK(ret_stuff,
+			(u64) SN_SAL_IOIF_GET_PCIBUS_INFO,
+			(u64) segment, (u64) busnum, (u64) address, 0, 0, 0, 0);
+	return ret_stuff.v0;
+}
+
+/*
+ * Retrieve the pci device information given the bus and device|function number.
+ */
+static inline uint64_t
+sal_get_pcidev_info(u64 segment, u64 bus_number, u64 devfn, u64 pci_dev, 
+			u64 sn_irq_info)
+{
+	struct ia64_sal_retval ret_stuff;
+	ret_stuff.status = 0;
+	ret_stuff.v0 = 0;
+
+	SAL_CALL_NOLOCK(ret_stuff,
+			(u64) SN_SAL_IOIF_GET_PCIDEV_INFO,
+			(u64) segment, (u64) bus_number, (u64) devfn, 
+			(u64) pci_dev,
+			sn_irq_info, 0, 0);
+	return ret_stuff.v0;
+}
+
+/*
+ * sn_alloc_pci_sysdata() - This routine allocates a pci controller
+ *	which is expected as the pci_dev and pci_bus sysdata by the Linux
+ *	PCI infrastructure.
+ */
+static inline struct pci_controller *sn_alloc_pci_sysdata(void)
+{
+	struct pci_controller *pci_sysdata;
+
+	pci_sysdata = kmalloc(sizeof(*pci_sysdata), GFP_KERNEL);
+	if (!pci_sysdata)
+		BUG();
+
+	memset(pci_sysdata, 0, sizeof(*pci_sysdata));
+	return pci_sysdata;
+}
+
+/*
+ * sn_fixup_ionodes() - This routine initializes the HUB data strcuture for 
+ *	each node in the system.
+ */
+static void sn_fixup_ionodes(void)
+{
+
+	struct sn_flush_device_list *sn_flush_device_list;
+	struct hubdev_info *hubdev;
+	uint64_t status;
+	uint64_t nasid;
+	int i, widget;
+
+	for (i = 0; i < numionodes; i++) {
+		hubdev = (struct hubdev_info *)(NODEPDA(i)->pdinfo);
+		nasid = cnodeid_to_nasid(i);
+		status = sal_get_hubdev_info(nasid, (uint64_t) __pa(hubdev));
+		if (status)
+			continue;
+
+		for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++)
+			hubdev->hdi_xwidget_info[widget].xwi_hubinfo = hubdev;
+
+		if (!hubdev->hdi_flush_nasid_list.widget_p)
+			continue;
+
+		hubdev->hdi_flush_nasid_list.widget_p =
+		    kmalloc((HUB_WIDGET_ID_MAX + 1) *
+			    sizeof(struct sn_flush_device_list *), GFP_KERNEL);
+
+		memset(hubdev->hdi_flush_nasid_list.widget_p, 0x0,
+		       (HUB_WIDGET_ID_MAX + 1) *
+		       sizeof(struct sn_flush_device_list *));
+
+		for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++) {
+			sn_flush_device_list = kmalloc(DEV_PER_WIDGET *
+						       sizeof(struct
+							      sn_flush_device_list),
+						       GFP_KERNEL);
+			memset(sn_flush_device_list, 0x0,
+			       DEV_PER_WIDGET *
+			       sizeof(struct sn_flush_device_list));
+
+			status =
+			    sal_get_widget_dmaflush_list(nasid, widget,
+							 (uint64_t)
+							 __pa
+							 (sn_flush_device_list));
+			if (status) {
+				kfree(sn_flush_device_list);
+				continue;
+			}
+
+			hubdev->hdi_flush_nasid_list.widget_p[widget] =
+			    sn_flush_device_list;
+		}
+
+		if (!(i & 1))
+			hub_error_init(hubdev);
+		else
+			ice_error_init(hubdev);
+	}
+
+}
+
+/*
+ * sn_pci_fixup_slot() - This routine sets up a slot's resources
+ * consistent with the Linux PCI abstraction layer.  Resources acquired
+ * from our PCI provider include PIO maps to BAR space and interrupt
+ * objects.
+ */
+static void sn_pci_fixup_slot(struct pci_dev *dev)
+{
+	int idx;
+	int segment = 0;
+	uint64_t size;
+	struct sn_irq_info *sn_irq_info;
+	struct pci_dev *host_pci_dev;
+	int status = 0;
+
+	dev->sysdata = kmalloc(sizeof(struct pcidev_info), GFP_KERNEL);
+	if (SN_PCIDEV_INFO(dev) <= 0)
+		BUG();		/* Cannot afford to run out of memory */
+	memset(SN_PCIDEV_INFO(dev), 0, sizeof(struct pcidev_info));
+
+	sn_irq_info = kmalloc(sizeof(struct sn_irq_info), GFP_KERNEL);
+	if (sn_irq_info <= 0)
+		BUG();		/* Cannot afford to run out of memory */
+	memset(sn_irq_info, 0, sizeof(struct sn_irq_info));
+
+	/* Call to retrieve pci device information needed by kernel. */
+	status = sal_get_pcidev_info((u64) segment, (u64) dev->bus->number, 
+				     dev->devfn,
+				     (u64) __pa(SN_PCIDEV_INFO(dev)),
+				     (u64) __pa(sn_irq_info));
+	if (status)
+		BUG();		/* Cannot get platform pci device information information */
+
+	/* Copy over PIO Mapped Addresses */
+	for (idx = 0; idx <= PCI_ROM_RESOURCE; idx++) {
+		unsigned long start, end, addr;
+
+		if (!SN_PCIDEV_INFO(dev)->pdi_pio_mapped_addr[idx])
+			continue;
+
+		start = dev->resource[idx].start;
+		end = dev->resource[idx].end;
+		size = end - start;
+		addr = SN_PCIDEV_INFO(dev)->pdi_pio_mapped_addr[idx];
+		addr = ((addr << 4) >> 4) | __IA64_UNCACHED_OFFSET;
+		dev->resource[idx].start = addr;
+		dev->resource[idx].end = addr + size;
+		if (dev->resource[idx].flags & IORESOURCE_IO)
+			dev->resource[idx].parent = &ioport_resource;
+		else
+			dev->resource[idx].parent = &iomem_resource;
+	}
+
+	/* set up host bus linkages */
+	host_pci_dev =
+	    pci_find_slot(SN_PCIDEV_INFO(dev)->pdi_slot_host_handle >> 32,
+			  SN_PCIDEV_INFO(dev)->
+			  pdi_slot_host_handle & 0xffffffff);
+	SN_PCIDEV_INFO(dev)->pdi_host_pcidev_info =
+	    SN_PCIDEV_INFO(host_pci_dev);
+	SN_PCIDEV_INFO(dev)->pdi_linux_pcidev = dev;
+	SN_PCIDEV_INFO(dev)->pdi_pcibus_info = SN_PCIBUS_BUSSOFT(dev->bus);
+
+	/* Only set up IRQ stuff if this device has a host bus context */
+	if (SN_PCIDEV_BUSSOFT(dev) && sn_irq_info->irq_irq) {
+		SN_PCIDEV_INFO(dev)->pdi_sn_irq_info = sn_irq_info;
+		dev->irq = SN_PCIDEV_INFO(dev)->pdi_sn_irq_info->irq_irq;
+		sn_irq_fixup(dev, sn_irq_info);
+	}
+}
+
+/*
+ * sn_pci_controller_fixup() - This routine sets up a bus's resources
+ * consistent with the Linux PCI abstraction layer.
+ */
+static void sn_pci_controller_fixup(int segment, int busnum)
+{
+	int status = 0;
+	int nasid, cnode;
+	struct pci_bus *bus;
+	struct pci_controller *controller;
+	struct pcibus_bussoft *prom_bussoft_ptr;
+	struct hubdev_info *hubdev_info;
+	void *provider_soft;
+
+	status =
+	    sal_get_pcibus_info((u64) segment, (u64) busnum,
+				(u64) ia64_tpa(&prom_bussoft_ptr));
+	if (status > 0) {
+		return;		/* bus # does not exist */
+	}
+
+	prom_bussoft_ptr = __va(prom_bussoft_ptr);
+	controller = sn_alloc_pci_sysdata();
+	/* controller non-zero is BUG'd in sn_alloc_pci_sysdata */
+
+	bus = pci_scan_bus(busnum, &pci_root_ops, controller);
+	if (bus == NULL) {
+		return;		/* error, or bus already scanned */
+	}
+
+	/*
+	 * Per-provider fixup.  Copies the contents from prom to local
+	 * area and links SN_PCIBUS_BUSSOFT().
+	 *
+	 * Note:  Provider is responsible for ensuring that prom_bussoft_ptr
+	 * represents an asic-type that it can handle.
+	 */
+
+	if (prom_bussoft_ptr->bs_asic_type == PCIIO_ASIC_TYPE_PPB) {
+		return;		/* no further fixup necessary */
+	}
+
+	provider_soft = pcibr_bus_fixup(prom_bussoft_ptr);
+	if (provider_soft == NULL) {
+		return;		/* fixup failed or not applicable */
+	}
+
+	/*
+	 * Generic bus fixup goes here.  Don't reference prom_bussoft_ptr
+	 * after this point.
+	 */
+
+	bus->sysdata = controller;
+	PCI_CONTROLLER(bus)->platform_data = provider_soft;
+
+	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]);
+}
+
+/*
+ * Ugly hack to get PCI setup until we have a proper ACPI namespace.
+ */
+
+#define PCI_BUSES_TO_SCAN 256
+
+static int __init sn_pci_init(void)
+{
+	int i = 0;
+	struct pci_dev *pci_dev = NULL;
+	extern void sn_init_cpei_timer(void);
+#ifdef CONFIG_PROC_FS
+	extern void register_sn_procfs(void);
+#endif
+
+	if (!ia64_platform_is("sn2") || IS_RUNNING_ON_SIMULATOR())
+		return 0;
+
+	/*
+	 * This is needed to avoid bounce limit checks in the blk layer
+	 */
+	ia64_max_iommu_merge_mask = ~PAGE_MASK;
+	sn_fixup_ionodes();
+	sn_irq = kmalloc(sizeof(struct sn_irq_info *) * NR_IRQS, GFP_KERNEL);
+	if (sn_irq <= 0)
+		BUG();		/* Canno afford to run out of memory. */
+	memset(sn_irq, 0, sizeof(struct sn_irq_info *) * NR_IRQS);
+
+	sn_init_cpei_timer();
+
+#ifdef CONFIG_PROC_FS
+	register_sn_procfs();
+#endif
+
+	for (i = 0; i < PCI_BUSES_TO_SCAN; i++) {
+		sn_pci_controller_fixup(0, i);
+	}
+
+	/*
+	 * Generic Linux PCI Layer has created the pci_bus and pci_dev 
+	 * structures - time for us to add our SN PLatform specific 
+	 * information.
+	 */
+
+	while ((pci_dev =
+		pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pci_dev)) != NULL) {
+		sn_pci_fixup_slot(pci_dev);
+	}
+
+	sn_ioif_inited = 1;	/* sn I/O infrastructure now initialized */
+
+	return 0;
+}
+
+/*
+ * hubdev_init_node() - Creates the HUB data structure and link them to it's 
+ *	own NODE specific data area.
+ */
+void hubdev_init_node(nodepda_t * npda, cnodeid_t node)
+{
+
+	struct hubdev_info *hubdev_info;
+
+	if (node >= num_online_nodes())	/* Headless/memless IO nodes */
+		hubdev_info =
+		    (struct hubdev_info *)alloc_bootmem_node(NODE_DATA(0),
+							     sizeof(struct
+								    hubdev_info));
+	else
+		hubdev_info =
+		    (struct hubdev_info *)alloc_bootmem_node(NODE_DATA(node),
+							     sizeof(struct
+								    hubdev_info));
+	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;
+
+}
+
+subsys_initcall(sn_pci_init);