1 files changed, 612 insertions, 0 deletions

diff --git a/arch/ia64/sn/kernel/io_common.c b/arch/ia64/sn/kernel/io_common.c
new file mode 100644
index 000000000000..12531de6754c
--- /dev/null
+++ b/arch/ia64/sn/kernel/io_common.c
@@ -0,0 +1,612 @@
+/*
+ * 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) 2006 Silicon Graphics, Inc. All rights reserved.
+ */
+
+#include <linux/bootmem.h>
+#include <asm/sn/types.h>
+#include <asm/sn/addrs.h>
+#include <asm/sn/sn_feature_sets.h>
+#include <asm/sn/geo.h>
+#include <asm/sn/io.h>
+#include <asm/sn/l1.h>
+#include <asm/sn/module.h>
+#include <asm/sn/pcibr_provider.h>
+#include <asm/sn/pcibus_provider_defs.h>
+#include <asm/sn/pcidev.h>
+#include <asm/sn/simulator.h>
+#include <asm/sn/sn_sal.h>
+#include <asm/sn/tioca_provider.h>
+#include <asm/sn/tioce_provider.h>
+#include "xtalk/hubdev.h"
+#include "xtalk/xwidgetdev.h"
+#include <linux/acpi.h>
+#include <asm/sn/sn2/sn_hwperf.h>
+#include <asm/sn/acpi.h>
+
+extern void sn_init_cpei_timer(void);
+extern void register_sn_procfs(void);
+extern void sn_acpi_bus_fixup(struct pci_bus *);
+extern void sn_bus_fixup(struct pci_bus *);
+extern void sn_acpi_slot_fixup(struct pci_dev *, struct pcidev_info *);
+extern void sn_more_slot_fixup(struct pci_dev *, struct pcidev_info *);
+extern void sn_legacy_pci_window_fixup(struct pci_controller *, u64, u64);
+extern void sn_io_acpi_init(void);
+extern void sn_io_init(void);
+
+
+static struct list_head sn_sysdata_list;
+
+/* sysdata list struct */
+struct sysdata_el {
+        struct list_head entry;
+        void *sysdata;
+};
+
+int sn_ioif_inited;             /* SN I/O infrastructure initialized? */
+
+struct sn_pcibus_provider *sn_pci_provider[PCIIO_ASIC_MAX_TYPES];       /* indexed by asic type */
+
+/*
+ * Hooks and struct for unsupported pci providers
+ */
+
+static dma_addr_t
+sn_default_pci_map(struct pci_dev *pdev, unsigned long paddr, size_t size, int type)
+{
+        return 0;
+}
+
+static void
+sn_default_pci_unmap(struct pci_dev *pdev, dma_addr_t addr, int direction)
+{
+        return;
+}
+
+static void *
+sn_default_pci_bus_fixup(struct pcibus_bussoft *soft, struct pci_controller *controller)
+{
+        return NULL;
+}
+
+static struct sn_pcibus_provider sn_pci_default_provider = {
+        .dma_map = sn_default_pci_map,
+        .dma_map_consistent = sn_default_pci_map,
+        .dma_unmap = sn_default_pci_unmap,
+        .bus_fixup = sn_default_pci_bus_fixup,
+};
+
+/*
+ * Retrieve the DMA Flush List given nasid, widget, and device.
+ * This list is needed to implement the WAR - Flush DMA data on PIO Reads.
+ */
+static inline u64
+sal_get_device_dmaflush_list(u64 nasid, u64 widget_num, u64 device_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_DEVICE_DMAFLUSH_LIST,
+                        (u64) nasid, (u64) widget_num,
+                        (u64) device_num, (u64) address, 0, 0, 0);
+        return ret_stuff.status;
+}
+
+/*
+ * Retrieve the pci device information given the bus and device|function number.
+ */
+static inline u64
+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_pcidev_info_get() - Retrieve the pcidev_info struct for the specified
+ *                        device.
+ */
+inline struct pcidev_info *
+sn_pcidev_info_get(struct pci_dev *dev)
+{
+        struct pcidev_info *pcidev;
+
+        list_for_each_entry(pcidev,
+                            &(SN_PLATFORM_DATA(dev)->pcidev_info), pdi_list) {
+                if (pcidev->pdi_linux_pcidev == dev)
+                        return pcidev;
+        }
+        return NULL;
+}
+
+/* Older PROM flush WAR
+ *
+ * 01/16/06 -- This war will be in place until a new official PROM is released.
+ * Additionally note that the struct sn_flush_device_war also has to be
+ * removed from arch/ia64/sn/include/xtalk/hubdev.h
+ */
+static u8 war_implemented = 0;
+
+static s64 sn_device_fixup_war(u64 nasid, u64 widget, int device,
+                               struct sn_flush_device_common *common)
+{
+        struct sn_flush_device_war *war_list;
+        struct sn_flush_device_war *dev_entry;
+        struct ia64_sal_retval isrv = {0,0,0,0};
+
+        if (!war_implemented) {
+                printk(KERN_WARNING "PROM version < 4.50 -- implementing old "
+                       "PROM flush WAR\n");
+                war_implemented = 1;
+        }
+
+        war_list = kzalloc(DEV_PER_WIDGET * sizeof(*war_list), GFP_KERNEL);
+        if (!war_list)
+                BUG();
+
+        SAL_CALL_NOLOCK(isrv, SN_SAL_IOIF_GET_WIDGET_DMAFLUSH_LIST,
+                        nasid, widget, __pa(war_list), 0, 0, 0 ,0);
+        if (isrv.status)
+                panic("sn_device_fixup_war failed: %s\n",
+                      ia64_sal_strerror(isrv.status));
+
+        dev_entry = war_list + device;
+        memcpy(common,dev_entry, sizeof(*common));
+        kfree(war_list);
+
+        return isrv.status;
+}
+
+/*
+ * sn_common_hubdev_init() - This routine is called to initialize the HUB data
+ *                           structure for each node in the system.
+ */
+void __init
+sn_common_hubdev_init(struct hubdev_info *hubdev)
+{
+
+        struct sn_flush_device_kernel *sn_flush_device_kernel;
+        struct sn_flush_device_kernel *dev_entry;
+        s64 status;
+        int widget, device, size;
+
+        /* Attach the error interrupt handlers */
+        if (hubdev->hdi_nasid & 1)      /* If TIO */
+                ice_error_init(hubdev);
+        else
+                hub_error_init(hubdev);
+
+        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)
+                return;
+
+        size = (HUB_WIDGET_ID_MAX + 1) *
+                sizeof(struct sn_flush_device_kernel *);
+        hubdev->hdi_flush_nasid_list.widget_p =
+                kzalloc(size, GFP_KERNEL);
+        if (!hubdev->hdi_flush_nasid_list.widget_p)
+                BUG();
+
+        for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++) {
+                size = DEV_PER_WIDGET *
+                        sizeof(struct sn_flush_device_kernel);
+                sn_flush_device_kernel = kzalloc(size, GFP_KERNEL);
+                if (!sn_flush_device_kernel)
+                        BUG();
+
+                dev_entry = sn_flush_device_kernel;
+                for (device = 0; device < DEV_PER_WIDGET;
+                     device++, dev_entry++) {
+                        size = sizeof(struct sn_flush_device_common);
+                        dev_entry->common = kzalloc(size, GFP_KERNEL);
+                        if (!dev_entry->common)
+                                BUG();
+                        if (sn_prom_feature_available(PRF_DEVICE_FLUSH_LIST))
+                                status = sal_get_device_dmaflush_list(
+                                             hubdev->hdi_nasid, widget, device,
+                                             (u64)(dev_entry->common));
+                        else
+                                status = sn_device_fixup_war(hubdev->hdi_nasid,
+                                                             widget, device,
+                                                             dev_entry->common);
+                        if (status != SALRET_OK)
+                                panic("SAL call failed: %s\n",
+                                      ia64_sal_strerror(status));
+
+                        spin_lock_init(&dev_entry->sfdl_flush_lock);
+                }
+
+                if (sn_flush_device_kernel)
+                        hubdev->hdi_flush_nasid_list.widget_p[widget] =
+                                                         sn_flush_device_kernel;
+        }
+}
+
+void sn_pci_unfixup_slot(struct pci_dev *dev)
+{
+        struct pci_dev *host_pci_dev = SN_PCIDEV_INFO(dev)->host_pci_dev;
+
+        sn_irq_unfixup(dev);
+        pci_dev_put(host_pci_dev);
+        pci_dev_put(dev);
+}
+
+/*
+ * 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.
+ */
+void sn_pci_fixup_slot(struct pci_dev *dev)
+{
+        int segment = pci_domain_nr(dev->bus);
+        int status = 0;
+        struct pcibus_bussoft *bs;
+        struct pci_bus *host_pci_bus;
+        struct pci_dev *host_pci_dev;
+        struct pcidev_info *pcidev_info;
+        struct sn_irq_info *sn_irq_info;
+        unsigned int bus_no, devfn;
+
+        pci_dev_get(dev); /* for the sysdata pointer */
+        pcidev_info = kzalloc(sizeof(struct pcidev_info), GFP_KERNEL);
+        if (!pcidev_info)
+                BUG();          /* Cannot afford to run out of memory */
+
+        sn_irq_info = kzalloc(sizeof(struct sn_irq_info), GFP_KERNEL);
+        if (!sn_irq_info)
+                BUG();          /* Cannot afford to run out of memory */
+
+        /* Call to retrieve pci device information needed by kernel. */
+        status = sal_get_pcidev_info((u64) segment, (u64) dev->bus->number,
+                                     dev->devfn,
+                                     (u64) __pa(pcidev_info),
+                                     (u64) __pa(sn_irq_info));
+        if (status)
+                BUG(); /* Cannot get platform pci device information */
+
+        /* Add pcidev_info to list in pci_controller.platform_data */
+        list_add_tail(&pcidev_info->pdi_list,
+                      &(SN_PLATFORM_DATA(dev->bus)->pcidev_info));
+
+        if (!SN_ACPI_BASE_SUPPORT())
+                sn_more_slot_fixup(dev, pcidev_info);
+
+        /*
+         * Using the PROMs values for the PCI host bus, get the Linux
+         * PCI host_pci_dev struct and set up host bus linkages
+         */
+
+        bus_no = (pcidev_info->pdi_slot_host_handle >> 32) & 0xff;
+        devfn = pcidev_info->pdi_slot_host_handle & 0xffffffff;
+        host_pci_bus = pci_find_bus(segment, bus_no);
+        host_pci_dev = pci_get_slot(host_pci_bus, devfn);
+
+        pcidev_info->host_pci_dev = host_pci_dev;
+        pcidev_info->pdi_linux_pcidev = dev;
+        pcidev_info->pdi_host_pcidev_info = SN_PCIDEV_INFO(host_pci_dev);
+        bs = SN_PCIBUS_BUSSOFT(dev->bus);
+        pcidev_info->pdi_pcibus_info = bs;
+
+        if (bs && bs->bs_asic_type < PCIIO_ASIC_MAX_TYPES) {
+                SN_PCIDEV_BUSPROVIDER(dev) = sn_pci_provider[bs->bs_asic_type];
+        } else {
+                SN_PCIDEV_BUSPROVIDER(dev) = &sn_pci_default_provider;
+        }
+
+        /* Only set up IRQ stuff if this device has a host bus context */
+        if (bs && sn_irq_info->irq_irq) {
+                pcidev_info->pdi_sn_irq_info = sn_irq_info;
+                dev->irq = pcidev_info->pdi_sn_irq_info->irq_irq;
+                sn_irq_fixup(dev, sn_irq_info);
+        } else {
+                pcidev_info->pdi_sn_irq_info = NULL;
+                kfree(sn_irq_info);
+        }
+}
+
+/*
+ * sn_common_bus_fixup - Perform platform specific bus fixup.
+ *                       Execute the ASIC specific fixup routine
+ *                       for this bus.
+ */
+void
+sn_common_bus_fixup(struct pci_bus *bus,
+                    struct pcibus_bussoft *prom_bussoft_ptr)
+{
+        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, "%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 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));
+}
+
+/*
+ * sn_pci_fixup_bus() - Perform SN specific setup of software structs
+ *                      (pcibus_bussoft, pcidev_info) and hardware
+ *                      registers, for the specified bus and devices under it.
+ */
+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;
+
+        /*
+         * prime sn_pci_provider[].  Individial 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
+
+        printk(KERN_INFO "ACPI  DSDT OEM Rev 0x%x\n",
+               acpi_gbl_DSDT->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)) {
+                        /* TIO 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 "pcibr_bus_fixup: failed "
+                                       "to find near node with CPUs to TIO "
+                                       "node %d, err=%d\n", cnode, e);
+                        }
+                        PCI_CONTROLLER(bus)->node = near_cnode;
+                } else if (bussoft->bs_asic_type == PCIIO_ASIC_TYPE_PIC) {
+                        PCI_CONTROLLER(bus)->node = cnode;
+                }
+        }
+
+        sn_ioif_inited = 1;     /* SN I/O infrastructure now initialized */
+
+        return 0;
+}
+
+fs_initcall(sn_io_late_init);
+
+EXPORT_SYMBOL(sn_pci_fixup_slot);
+EXPORT_SYMBOL(sn_pci_unfixup_slot);
+EXPORT_SYMBOL(sn_bus_store_sysdata);
+EXPORT_SYMBOL(sn_bus_free_sysdata);
+EXPORT_SYMBOL(sn_generate_path);
+