mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-27 18:25:04 +07:00
157 lines
4.2 KiB
C
157 lines
4.2 KiB
C
/*
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* IBM PowerPC iSeries Virtual I/O Infrastructure Support.
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*
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* Copyright (c) 2005 Stephen Rothwell, IBM Corp.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/types.h>
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#include <linux/device.h>
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#include <linux/init.h>
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#include <asm/vio.h>
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#include <asm/iommu.h>
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#include <asm/tce.h>
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#include <asm/abs_addr.h>
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#include <asm/page.h>
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#include <asm/iSeries/vio.h>
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#include <asm/iSeries/HvTypes.h>
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#include <asm/iSeries/HvLpConfig.h>
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#include <asm/iSeries/HvCallXm.h>
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struct device *iSeries_vio_dev = &vio_bus_device.dev;
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EXPORT_SYMBOL(iSeries_vio_dev);
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static struct iommu_table veth_iommu_table;
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static struct iommu_table vio_iommu_table;
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static void __init iommu_vio_init(void)
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{
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struct iommu_table *t;
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struct iommu_table_cb cb;
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unsigned long cbp;
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unsigned long itc_entries;
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cb.itc_busno = 255; /* Bus 255 is the virtual bus */
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cb.itc_virtbus = 0xff; /* Ask for virtual bus */
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cbp = virt_to_abs(&cb);
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HvCallXm_getTceTableParms(cbp);
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itc_entries = cb.itc_size * PAGE_SIZE / sizeof(union tce_entry);
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veth_iommu_table.it_size = itc_entries / 2;
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veth_iommu_table.it_busno = cb.itc_busno;
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veth_iommu_table.it_offset = cb.itc_offset;
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veth_iommu_table.it_index = cb.itc_index;
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veth_iommu_table.it_type = TCE_VB;
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veth_iommu_table.it_blocksize = 1;
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t = iommu_init_table(&veth_iommu_table);
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if (!t)
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printk("Virtual Bus VETH TCE table failed.\n");
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vio_iommu_table.it_size = itc_entries - veth_iommu_table.it_size;
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vio_iommu_table.it_busno = cb.itc_busno;
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vio_iommu_table.it_offset = cb.itc_offset +
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veth_iommu_table.it_size;
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vio_iommu_table.it_index = cb.itc_index;
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vio_iommu_table.it_type = TCE_VB;
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vio_iommu_table.it_blocksize = 1;
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t = iommu_init_table(&vio_iommu_table);
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if (!t)
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printk("Virtual Bus VIO TCE table failed.\n");
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}
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/**
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* vio_register_device_iseries: - Register a new iSeries vio device.
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* @voidev: The device to register.
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*/
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static struct vio_dev *__init vio_register_device_iseries(char *type,
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uint32_t unit_num)
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{
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struct vio_dev *viodev;
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/* allocate a vio_dev for this device */
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viodev = kmalloc(sizeof(struct vio_dev), GFP_KERNEL);
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if (!viodev)
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return NULL;
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memset(viodev, 0, sizeof(struct vio_dev));
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snprintf(viodev->dev.bus_id, BUS_ID_SIZE, "%s%d", type, unit_num);
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viodev->name = viodev->dev.bus_id;
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viodev->type = type;
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viodev->unit_address = unit_num;
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viodev->iommu_table = &vio_iommu_table;
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if (vio_register_device(viodev) == NULL) {
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kfree(viodev);
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return NULL;
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}
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return viodev;
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}
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void __init probe_bus_iseries(void)
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{
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HvLpIndexMap vlan_map;
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struct vio_dev *viodev;
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int i;
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/* there is only one of each of these */
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vio_register_device_iseries("viocons", 0);
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vio_register_device_iseries("vscsi", 0);
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vlan_map = HvLpConfig_getVirtualLanIndexMap();
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for (i = 0; i < HVMAXARCHITECTEDVIRTUALLANS; i++) {
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if ((vlan_map & (0x8000 >> i)) == 0)
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continue;
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viodev = vio_register_device_iseries("vlan", i);
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/* veth is special and has it own iommu_table */
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viodev->iommu_table = &veth_iommu_table;
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}
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for (i = 0; i < HVMAXARCHITECTEDVIRTUALDISKS; i++)
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vio_register_device_iseries("viodasd", i);
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for (i = 0; i < HVMAXARCHITECTEDVIRTUALCDROMS; i++)
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vio_register_device_iseries("viocd", i);
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for (i = 0; i < HVMAXARCHITECTEDVIRTUALTAPES; i++)
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vio_register_device_iseries("viotape", i);
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}
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/**
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* vio_match_device_iseries: - Tell if a iSeries VIO device matches a
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* vio_device_id
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*/
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static int vio_match_device_iseries(const struct vio_device_id *id,
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const struct vio_dev *dev)
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{
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return strncmp(dev->type, id->type, strlen(id->type)) == 0;
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}
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static struct vio_bus_ops vio_bus_ops_iseries = {
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.match = vio_match_device_iseries,
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};
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/**
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* vio_bus_init_iseries: - Initialize the iSeries virtual IO bus
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*/
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static int __init vio_bus_init_iseries(void)
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{
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int err;
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err = vio_bus_init(&vio_bus_ops_iseries);
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if (err == 0) {
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iommu_vio_init();
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vio_bus_device.iommu_table = &vio_iommu_table;
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iSeries_vio_dev = &vio_bus_device.dev;
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probe_bus_iseries();
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}
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return err;
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}
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__initcall(vio_bus_init_iseries);
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