kbuild: fix silentoldconfig with make O=

[linux-2.6/verdex.git] / arch / ia64 / sn / kernel / io_init.c

/*
 * 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/addrs.h>
#include <asm/sn/geo.h>
#include <asm/sn/io.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"

nasid_t master_nasid = INVALID_NASID;   /* Partition Master */

static struct list_head sn_sysdata_list;

/* sysdata list struct */
struct sysdata_el {
        struct list_head entry;
        void *sysdata;
};

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? */

struct sn_pcibus_provider *sn_pci_provider[PCIIO_ASIC_MAX_TYPES];       /* indexed by asic type */

static int max_segment_number = 0; /* Default highest segment number */
static int max_pcibus_number = 255; /* Default highest pci bus number */

/*
 * 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)
{
        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.  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_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;

        /*
         * Get SGI Specific HUB chipset information.
         * Inform Prom that this kernel can support domain bus numbering.
         */
        for (i = 0; i < numionodes; i++) {
                hubdev = (struct hubdev_info *)(NODEPDA(i)->pdinfo);
                nasid = cnodeid_to_nasid(i);
                hubdev->max_segment_number = 0xffffffff;
                hubdev->max_pcibus_number = 0xff;
                status = sal_get_hubdev_info(nasid, (uint64_t) __pa(hubdev));
                if (status)
                        continue;

                /* Save the largest Domain and pcibus numbers found. */
                if (hubdev->max_segment_number) {
                        /*
                         * Dealing with a Prom that supports segments.
                         */
                        max_segment_number = hubdev->max_segment_number;
                        max_pcibus_number = hubdev->max_pcibus_number;
                }

                /* Attach the error interrupt handlers */
                if (nasid & 1)
                        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)
                        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;
                        }

                        spin_lock_init(&sn_flush_device_list->sfdl_flush_lock);
                        hubdev->hdi_flush_nasid_list.widget_p[widget] =
                            sn_flush_device_list;
                }

        }

}

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 idx;
        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 sn_irq_info *sn_irq_info;
        unsigned long size;
        unsigned int bus_no, devfn;

        pci_dev_get(dev); /* for the sysdata pointer */
        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 */

        /* 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;
        }

        /*
         * 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 = (SN_PCIDEV_INFO(dev)->pdi_slot_host_handle >> 32) & 0xff;
        devfn = SN_PCIDEV_INFO(dev)->pdi_slot_host_handle & 0xffffffff;
        host_pci_bus = pci_find_bus(segment, bus_no);
        host_pci_dev = pci_get_slot(host_pci_bus, devfn);

        SN_PCIDEV_INFO(dev)->host_pci_dev = host_pci_dev;
        SN_PCIDEV_INFO(dev)->pdi_host_pcidev_info =
                                                SN_PCIDEV_INFO(host_pci_dev);
        SN_PCIDEV_INFO(dev)->pdi_linux_pcidev = dev;
        bs = SN_PCIBUS_BUSSOFT(dev->bus);
        SN_PCIDEV_INFO(dev)->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) {
                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);
        } else {
                SN_PCIDEV_INFO(dev)->pdi_sn_irq_info = NULL;
                kfree(sn_irq_info);
        }
}

/*
 * sn_pci_controller_fixup() - This routine sets up a bus's resources
 * consistent with the Linux PCI abstraction layer.
 */
void sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)
{
        int status = 0;
        int nasid, cnode;
        struct pci_controller *controller;
        struct pcibus_bussoft *prom_bussoft_ptr;
        struct hubdev_info *hubdev_info;
        void *provider_soft = NULL;
        struct sn_pcibus_provider *provider;

        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 = kcalloc(1,sizeof(struct pci_controller), GFP_KERNEL);
        controller->segment = segment;
        if (!controller)
                BUG();

        if (bus == NULL) {
                bus = pci_scan_bus(busnum, &pci_root_ops, controller);
                if (bus == NULL)
                        goto error_return; /* error, or bus already scanned */
                bus->sysdata = NULL;
        }

        if (bus->sysdata)
                goto error_return; /* sysdata already alloc'd */

        /*
         * Per-provider fixup.  Copies the contents from prom to local
         * area and links SN_PCIBUS_BUSSOFT().
         */

        if (prom_bussoft_ptr->bs_asic_type >= PCIIO_ASIC_MAX_TYPES)
                goto error_return; /* unsupported asic type */

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

        provider = sn_pci_provider[prom_bussoft_ptr->bs_asic_type];
        if (provider == NULL)
                goto error_return; /* no provider registerd for this asic */

        bus->sysdata = controller;
        if (provider->bus_fixup)
                provider_soft = (*provider->bus_fixup) (prom_bussoft_ptr, controller);

        if (provider_soft == NULL) {
                /* fixup failed or not applicable */
                bus->sysdata = NULL;
                goto error_return;
        }

        /*
         * Generic bus fixup goes here.  Don't reference prom_bussoft_ptr
         * after this point.
         */

        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]);

        /*
         * 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;
        }
        return;

error_return:

        kfree(controller);
        return;
}

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 = dev->sysdata;
        list_add(&element->entry, &sn_sysdata_list);
}

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

sn_sysdata_free_start:
        list_for_each(list, &sn_sysdata_list) {
                element = list_entry(list, struct sysdata_el, entry);
                list_del(&element->entry);
                kfree(element->sysdata);
                kfree(element);
                goto sn_sysdata_free_start;
        }
        return;
}

/*
 * 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;
        int j = 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_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_fixup_ionodes();
        sn_irq_lh_init();
        INIT_LIST_HEAD(&sn_sysdata_list);
        sn_init_cpei_timer();

#ifdef CONFIG_PROC_FS
        register_sn_procfs();
#endif

        /* busses are not known yet ... */
        for (i = 0; i <= max_segment_number; i++)
                for (j = 0; j <= max_pcibus_number; j++)
                        sn_pci_controller_fixup(i, j, NULL);

        /*
         * 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_get_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);
EXPORT_SYMBOL(sn_pci_fixup_slot);
EXPORT_SYMBOL(sn_pci_unfixup_slot);
EXPORT_SYMBOL(sn_pci_controller_fixup);
EXPORT_SYMBOL(sn_bus_store_sysdata);
EXPORT_SYMBOL(sn_bus_free_sysdata);