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 00000000000..001880812b7
--- /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);