[qemu.git] / hw / ppc / spapr_vio.c

/*
 * QEMU sPAPR VIO code
 *
 * Copyright (c) 2010 David Gibson, IBM Corporation <dwg@au1.ibm.com>
 * Based on the s390 virtio bus code:
 * Copyright (c) 2009 Alexander Graf <agraf@suse.de>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
 */

#include "hw/hw.h"
#include "sysemu/sysemu.h"
#include "hw/boards.h"
#include "monitor/monitor.h"
#include "hw/loader.h"
#include "elf.h"
#include "hw/sysbus.h"
#include "sysemu/kvm.h"
#include "sysemu/device_tree.h"
#include "kvm_ppc.h"

#include "hw/ppc/spapr.h"
#include "hw/ppc/spapr_vio.h"
#include "hw/ppc/xics.h"

#include <libfdt.h>

/* #define DEBUG_SPAPR */

#ifdef DEBUG_SPAPR
#define dprintf(fmt, ...) \
    do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
#else
#define dprintf(fmt, ...) \
    do { } while (0)
#endif

static Property spapr_vio_props[] = {
    DEFINE_PROP_UINT32("irq", VIOsPAPRDevice, irq, 0), \
    DEFINE_PROP_END_OF_LIST(),
};

static char *spapr_vio_get_dev_name(DeviceState *qdev)
{
    VIOsPAPRDevice *dev = VIO_SPAPR_DEVICE(qdev);
    VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
    char *name;

    /* Device tree style name device@reg */
    name = g_strdup_printf("%s@%x", pc->dt_name, dev->reg);

    return name;
}

static void spapr_vio_bus_class_init(ObjectClass *klass, void *data)
{
    BusClass *k = BUS_CLASS(klass);

    k->get_dev_path = spapr_vio_get_dev_name;
}

static const TypeInfo spapr_vio_bus_info = {
    .name = TYPE_SPAPR_VIO_BUS,
    .parent = TYPE_BUS,
    .class_init = spapr_vio_bus_class_init,
    .instance_size = sizeof(VIOsPAPRBus),
};

VIOsPAPRDevice *spapr_vio_find_by_reg(VIOsPAPRBus *bus, uint32_t reg)
{
    BusChild *kid;
    VIOsPAPRDevice *dev = NULL;

    QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
        dev = (VIOsPAPRDevice *)kid->child;
        if (dev->reg == reg) {
            return dev;
        }
    }

    return NULL;
}

static int vio_make_devnode(VIOsPAPRDevice *dev,
                            void *fdt)
{
    VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
    int vdevice_off, node_off, ret;
    char *dt_name;

    vdevice_off = fdt_path_offset(fdt, "/vdevice");
    if (vdevice_off < 0) {
        return vdevice_off;
    }

    dt_name = spapr_vio_get_dev_name(DEVICE(dev));
    node_off = fdt_add_subnode(fdt, vdevice_off, dt_name);
    g_free(dt_name);
    if (node_off < 0) {
        return node_off;
    }

    ret = fdt_setprop_cell(fdt, node_off, "reg", dev->reg);
    if (ret < 0) {
        return ret;
    }

    if (pc->dt_type) {
        ret = fdt_setprop_string(fdt, node_off, "device_type",
                                 pc->dt_type);
        if (ret < 0) {
            return ret;
        }
    }

    if (pc->dt_compatible) {
        ret = fdt_setprop_string(fdt, node_off, "compatible",
                                 pc->dt_compatible);
        if (ret < 0) {
            return ret;
        }
    }

    if (dev->irq) {
        uint32_t ints_prop[] = {cpu_to_be32(dev->irq), 0};

        ret = fdt_setprop(fdt, node_off, "interrupts", ints_prop,
                          sizeof(ints_prop));
        if (ret < 0) {
            return ret;
        }
    }

    ret = spapr_tcet_dma_dt(fdt, node_off, "ibm,my-dma-window", dev->tcet);
    if (ret < 0) {
        return ret;
    }

    if (pc->devnode) {
        ret = (pc->devnode)(dev, fdt, node_off);
        if (ret < 0) {
            return ret;
        }
    }

    return node_off;
}

/*
 * CRQ handling
 */
static target_ulong h_reg_crq(PowerPCCPU *cpu, sPAPREnvironment *spapr,
                              target_ulong opcode, target_ulong *args)
{
    target_ulong reg = args[0];
    target_ulong queue_addr = args[1];
    target_ulong queue_len = args[2];
    VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);

    if (!dev) {
        hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg);
        return H_PARAMETER;
    }

    /* We can't grok a queue size bigger than 256M for now */
    if (queue_len < 0x1000 || queue_len > 0x10000000) {
        hcall_dprintf("Queue size too small or too big (0x" TARGET_FMT_lx
                      ")\n", queue_len);
        return H_PARAMETER;
    }

    /* Check queue alignment */
    if (queue_addr & 0xfff) {
        hcall_dprintf("Queue not aligned (0x" TARGET_FMT_lx ")\n", queue_addr);
        return H_PARAMETER;
    }

    /* Check if device supports CRQs */
    if (!dev->crq.SendFunc) {
        hcall_dprintf("Device does not support CRQ\n");
        return H_NOT_FOUND;
    }

    /* Already a queue ? */
    if (dev->crq.qsize) {
        hcall_dprintf("CRQ already registered\n");
        return H_RESOURCE;
    }
    dev->crq.qladdr = queue_addr;
    dev->crq.qsize = queue_len;
    dev->crq.qnext = 0;

    dprintf("CRQ for dev 0x" TARGET_FMT_lx " registered at 0x"
            TARGET_FMT_lx "/0x" TARGET_FMT_lx "\n",
            reg, queue_addr, queue_len);
    return H_SUCCESS;
}

static target_ulong free_crq(VIOsPAPRDevice *dev)
{
    dev->crq.qladdr = 0;
    dev->crq.qsize = 0;
    dev->crq.qnext = 0;

    dprintf("CRQ for dev 0x%" PRIx32 " freed\n", dev->reg);

    return H_SUCCESS;
}

static target_ulong h_free_crq(PowerPCCPU *cpu, sPAPREnvironment *spapr,
                               target_ulong opcode, target_ulong *args)
{
    target_ulong reg = args[0];
    VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);

    if (!dev) {
        hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg);
        return H_PARAMETER;
    }

    return free_crq(dev);
}

static target_ulong h_send_crq(PowerPCCPU *cpu, sPAPREnvironment *spapr,
                               target_ulong opcode, target_ulong *args)
{
    target_ulong reg = args[0];
    target_ulong msg_hi = args[1];
    target_ulong msg_lo = args[2];
    VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
    uint64_t crq_mangle[2];

    if (!dev) {
        hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg);
        return H_PARAMETER;
    }
    crq_mangle[0] = cpu_to_be64(msg_hi);
    crq_mangle[1] = cpu_to_be64(msg_lo);

    if (dev->crq.SendFunc) {
        return dev->crq.SendFunc(dev, (uint8_t *)crq_mangle);
    }

    return H_HARDWARE;
}

static target_ulong h_enable_crq(PowerPCCPU *cpu, sPAPREnvironment *spapr,
                                 target_ulong opcode, target_ulong *args)
{
    target_ulong reg = args[0];
    VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);

    if (!dev) {
        hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg);
        return H_PARAMETER;
    }

    return 0;
}

/* Returns negative error, 0 success, or positive: queue full */
int spapr_vio_send_crq(VIOsPAPRDevice *dev, uint8_t *crq)
{
    int rc;
    uint8_t byte;

    if (!dev->crq.qsize) {
        fprintf(stderr, "spapr_vio_send_creq on uninitialized queue\n");
        return -1;
    }

    /* Maybe do a fast path for KVM just writing to the pages */
    rc = spapr_vio_dma_read(dev, dev->crq.qladdr + dev->crq.qnext, &byte, 1);
    if (rc) {
        return rc;
    }
    if (byte != 0) {
        return 1;
    }

    rc = spapr_vio_dma_write(dev, dev->crq.qladdr + dev->crq.qnext + 8,
                             &crq[8], 8);
    if (rc) {
        return rc;
    }

    kvmppc_eieio();

    rc = spapr_vio_dma_write(dev, dev->crq.qladdr + dev->crq.qnext, crq, 8);
    if (rc) {
        return rc;
    }

    dev->crq.qnext = (dev->crq.qnext + 16) % dev->crq.qsize;

    if (dev->signal_state & 1) {
        qemu_irq_pulse(spapr_vio_qirq(dev));
    }

    return 0;
}

/* "quiesce" handling */

static void spapr_vio_quiesce_one(VIOsPAPRDevice *dev)
{
    if (dev->tcet) {
        spapr_tce_reset(dev->tcet);
    }
    free_crq(dev);
}

static void rtas_set_tce_bypass(PowerPCCPU *cpu, sPAPREnvironment *spapr,
                                uint32_t token,
                                uint32_t nargs, target_ulong args,
                                uint32_t nret, target_ulong rets)
{
    VIOsPAPRBus *bus = spapr->vio_bus;
    VIOsPAPRDevice *dev;
    uint32_t unit, enable;

    if (nargs != 2) {
        rtas_st(rets, 0, -3);
        return;
    }
    unit = rtas_ld(args, 0);
    enable = rtas_ld(args, 1);
    dev = spapr_vio_find_by_reg(bus, unit);
    if (!dev) {
        rtas_st(rets, 0, -3);
        return;
    }

    if (!dev->tcet) {
        rtas_st(rets, 0, -3);
        return;
    }

    spapr_tce_set_bypass(dev->tcet, !!enable);

    rtas_st(rets, 0, 0);
}

static void rtas_quiesce(PowerPCCPU *cpu, sPAPREnvironment *spapr,
                         uint32_t token,
                         uint32_t nargs, target_ulong args,
                         uint32_t nret, target_ulong rets)
{
    VIOsPAPRBus *bus = spapr->vio_bus;
    BusChild *kid;
    VIOsPAPRDevice *dev = NULL;

    if (nargs != 0) {
        rtas_st(rets, 0, -3);
        return;
    }

    QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
        dev = (VIOsPAPRDevice *)kid->child;
        spapr_vio_quiesce_one(dev);
    }

    rtas_st(rets, 0, 0);
}

static VIOsPAPRDevice *reg_conflict(VIOsPAPRDevice *dev)
{
    VIOsPAPRBus *bus = DO_UPCAST(VIOsPAPRBus, bus, dev->qdev.parent_bus);
    BusChild *kid;
    VIOsPAPRDevice *other;

    /*
     * Check for a device other than the given one which is already
     * using the requested address. We have to open code this because
     * the given dev might already be in the list.
     */
    QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
        other = VIO_SPAPR_DEVICE(kid->child);

        if (other != dev && other->reg == dev->reg) {
            return other;
        }
    }

    return 0;
}

static void spapr_vio_busdev_reset(DeviceState *qdev)
{
    VIOsPAPRDevice *dev = VIO_SPAPR_DEVICE(qdev);
    VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);

    /* Shut down the request queue and TCEs if necessary */
    spapr_vio_quiesce_one(dev);

    dev->signal_state = 0;

    if (pc->reset) {
        pc->reset(dev);
    }
}

static int spapr_vio_busdev_init(DeviceState *qdev)
{
    VIOsPAPRDevice *dev = (VIOsPAPRDevice *)qdev;
    VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
    char *id;

    if (dev->reg != -1) {
        /*
         * Explicitly assigned address, just verify that no-one else
         * is using it.  other mechanism). We have to open code this
         * rather than using spapr_vio_find_by_reg() because sdev
         * itself is already in the list.
         */
        VIOsPAPRDevice *other = reg_conflict(dev);

        if (other) {
            fprintf(stderr, "vio: %s and %s devices conflict at address %#x\n",
                    object_get_typename(OBJECT(qdev)),
                    object_get_typename(OBJECT(&other->qdev)),
                    dev->reg);
            return -1;
        }
    } else {
        /* Need to assign an address */
        VIOsPAPRBus *bus = DO_UPCAST(VIOsPAPRBus, bus, dev->qdev.parent_bus);

        do {
            dev->reg = bus->next_reg++;
        } while (reg_conflict(dev));
    }

    /* Don't overwrite ids assigned on the command line */
    if (!dev->qdev.id) {
        id = spapr_vio_get_dev_name(DEVICE(dev));
        dev->qdev.id = id;
    }

    dev->irq = spapr_allocate_msi(dev->irq);
    if (!dev->irq) {
        return -1;
    }

    if (pc->rtce_window_size) {
        uint32_t liobn = SPAPR_VIO_BASE_LIOBN | dev->reg;
        dev->tcet = spapr_tce_new_table(qdev, liobn, pc->rtce_window_size);
        address_space_init(&dev->as, spapr_tce_get_iommu(dev->tcet), qdev->id);
    }

    return pc->init(dev);
}

static target_ulong h_vio_signal(PowerPCCPU *cpu, sPAPREnvironment *spapr,
                                 target_ulong opcode,
                                 target_ulong *args)
{
    target_ulong reg = args[0];
    target_ulong mode = args[1];
    VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
    VIOsPAPRDeviceClass *pc;

    if (!dev) {
        return H_PARAMETER;
    }

    pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);

    if (mode & ~pc->signal_mask) {
        return H_PARAMETER;
    }

    dev->signal_state = mode;

    return H_SUCCESS;
}

VIOsPAPRBus *spapr_vio_bus_init(void)
{
    VIOsPAPRBus *bus;
    BusState *qbus;
    DeviceState *dev;

    /* Create bridge device */
    dev = qdev_create(NULL, "spapr-vio-bridge");
    qdev_init_nofail(dev);

    /* Create bus on bridge device */

    qbus = qbus_create(TYPE_SPAPR_VIO_BUS, dev, "spapr-vio");
    bus = DO_UPCAST(VIOsPAPRBus, bus, qbus);
    bus->next_reg = 0x71000000;

    /* hcall-vio */
    spapr_register_hypercall(H_VIO_SIGNAL, h_vio_signal);

    /* hcall-crq */
    spapr_register_hypercall(H_REG_CRQ, h_reg_crq);
    spapr_register_hypercall(H_FREE_CRQ, h_free_crq);
    spapr_register_hypercall(H_SEND_CRQ, h_send_crq);
    spapr_register_hypercall(H_ENABLE_CRQ, h_enable_crq);

    /* RTAS calls */
    spapr_rtas_register("ibm,set-tce-bypass", rtas_set_tce_bypass);
    spapr_rtas_register("quiesce", rtas_quiesce);

    return bus;
}

/* Represents sPAPR hcall VIO devices */

static int spapr_vio_bridge_init(SysBusDevice *dev)
{
    /* nothing */
    return 0;
}

static void spapr_vio_bridge_class_init(ObjectClass *klass, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(klass);
    SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);

    k->init = spapr_vio_bridge_init;
    dc->no_user = 1;
}

static const TypeInfo spapr_vio_bridge_info = {
    .name          = "spapr-vio-bridge",
    .parent        = TYPE_SYS_BUS_DEVICE,
    .instance_size = sizeof(SysBusDevice),
    .class_init    = spapr_vio_bridge_class_init,
};

static void vio_spapr_device_class_init(ObjectClass *klass, void *data)
{
    DeviceClass *k = DEVICE_CLASS(klass);
    k->init = spapr_vio_busdev_init;
    k->reset = spapr_vio_busdev_reset;
    k->bus_type = TYPE_SPAPR_VIO_BUS;
    k->props = spapr_vio_props;
}

static const TypeInfo spapr_vio_type_info = {
    .name = TYPE_VIO_SPAPR_DEVICE,
    .parent = TYPE_DEVICE,
    .instance_size = sizeof(VIOsPAPRDevice),
    .abstract = true,
    .class_size = sizeof(VIOsPAPRDeviceClass),
    .class_init = vio_spapr_device_class_init,
};

static void spapr_vio_register_types(void)
{
    type_register_static(&spapr_vio_bus_info);
    type_register_static(&spapr_vio_bridge_info);
    type_register_static(&spapr_vio_type_info);
}

type_init(spapr_vio_register_types)

static int compare_reg(const void *p1, const void *p2)
{
    VIOsPAPRDevice const *dev1, *dev2;

    dev1 = (VIOsPAPRDevice *)*(DeviceState **)p1;
    dev2 = (VIOsPAPRDevice *)*(DeviceState **)p2;

    if (dev1->reg < dev2->reg) {
        return -1;
    }
    if (dev1->reg == dev2->reg) {
        return 0;
    }

    /* dev1->reg > dev2->reg */
    return 1;
}

int spapr_populate_vdevice(VIOsPAPRBus *bus, void *fdt)
{
    DeviceState *qdev, **qdevs;
    BusChild *kid;
    int i, num, ret = 0;

    /* Count qdevs on the bus list */
    num = 0;
    QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
        num++;
    }

    /* Copy out into an array of pointers */
    qdevs = g_malloc(sizeof(qdev) * num);
    num = 0;
    QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
        qdevs[num++] = kid->child;
    }

    /* Sort the array */
    qsort(qdevs, num, sizeof(qdev), compare_reg);

    /* Hack alert. Give the devices to libfdt in reverse order, we happen
     * to know that will mean they are in forward order in the tree. */
    for (i = num - 1; i >= 0; i--) {
        VIOsPAPRDevice *dev = (VIOsPAPRDevice *)(qdevs[i]);

        ret = vio_make_devnode(dev, fdt);

        if (ret < 0) {
            goto out;
        }
    }

    ret = 0;
out:
    free(qdevs);

    return ret;
}

int spapr_populate_chosen_stdout(void *fdt, VIOsPAPRBus *bus)
{
    VIOsPAPRDevice *dev;
    char *name, *path;
    int ret, offset;

    dev = spapr_vty_get_default(bus);
    if (!dev)
        return 0;

    offset = fdt_path_offset(fdt, "/chosen");
    if (offset < 0) {
        return offset;
    }

    name = spapr_vio_get_dev_name(DEVICE(dev));
    path = g_strdup_printf("/vdevice/%s", name);

    ret = fdt_setprop_string(fdt, offset, "linux,stdout-path", path);

    g_free(name);
    g_free(path);

    return ret;
}
Commit	Line	Data
4040ab72 DG	1	/*
	2	* QEMU sPAPR VIO code
	3	*
	4	* Copyright (c) 2010 David Gibson, IBM Corporation <dwg@au1.ibm.com>
	5	* Based on the s390 virtio bus code:
	6	* Copyright (c) 2009 Alexander Graf <agraf@suse.de>
	7	*
	8	* This library is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU Lesser General Public
	10	* License as published by the Free Software Foundation; either
	11	* version 2 of the License, or (at your option) any later version.
	12	*
	13	* This library is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	16	* Lesser General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU Lesser General Public
	19	* License along with this library; if not, see <http://www.gnu.org/licenses/>.
	20	*/
	21
83c9f4ca	22	#include "hw/hw.h"
9c17d615	23	#include "sysemu/sysemu.h"
83c9f4ca	24	#include "hw/boards.h"
83c9089e	25	#include "monitor/monitor.h"
83c9f4ca	26	#include "hw/loader.h"
4040ab72 DG	27	#include "elf.h"
4040ab72 DG	28	#include "hw/sysbus.h"
9c17d615 PB	29	#include "sysemu/kvm.h"
9c17d615 PB	30	#include "sysemu/device_tree.h"
b45d63b6	31	#include "kvm_ppc.h"
4040ab72	32
0d09e41a PB	33	#include "hw/ppc/spapr.h"
	34	#include "hw/ppc/spapr_vio.h"
	35	#include "hw/ppc/xics.h"
4040ab72	36
4040ab72	37	#include <libfdt.h>
4040ab72 DG	38
	39	/* #define DEBUG_SPAPR */
	40
	41	#ifdef DEBUG_SPAPR
	42	#define dprintf(fmt, ...) \
	43	do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
	44	#else
	45	#define dprintf(fmt, ...) \
	46	do { } while (0)
	47	#endif
	48
3cb75a7c	49	static Property spapr_vio_props[] = {
a307d594	50	DEFINE_PROP_UINT32("irq", VIOsPAPRDevice, irq, 0), \
3cb75a7c PB	51	DEFINE_PROP_END_OF_LIST(),
	52	};
	53
c4eda5b7 DG	54	static char spapr_vio_get_dev_name(DeviceState qdev)
	55	{
	56	VIOsPAPRDevice *dev = VIO_SPAPR_DEVICE(qdev);
	57	VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
	58	char *name;
	59
	60	/* Device tree style name device@reg */
	61	name = g_strdup_printf("%s@%x", pc->dt_name, dev->reg);
	62
	63	return name;
	64	}
	65
	66	static void spapr_vio_bus_class_init(ObjectClass klass, void data)
	67	{
	68	BusClass *k = BUS_CLASS(klass);
	69
	70	k->get_dev_path = spapr_vio_get_dev_name;
	71	}
	72
0d936928 AL	73	static const TypeInfo spapr_vio_bus_info = {
	74	.name = TYPE_SPAPR_VIO_BUS,
	75	.parent = TYPE_BUS,
c4eda5b7	76	.class_init = spapr_vio_bus_class_init,
0d936928	77	.instance_size = sizeof(VIOsPAPRBus),
4040ab72 DG	78	};
	79
	80	VIOsPAPRDevice spapr_vio_find_by_reg(VIOsPAPRBus bus, uint32_t reg)
	81	{
0866aca1	82	BusChild *kid;
4040ab72 DG	83	VIOsPAPRDevice *dev = NULL;
4040ab72 DG	84
0866aca1 AL	85	QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
0866aca1 AL	86	dev = (VIOsPAPRDevice *)kid->child;
4040ab72	87	if (dev->reg == reg) {
5435352c	88	return dev;
4040ab72 DG	89	}
	90	}
	91
5435352c	92	return NULL;
4040ab72 DG	93	}
4040ab72 DG	94
4040ab72 DG	95	static int vio_make_devnode(VIOsPAPRDevice *dev,
	96	void *fdt)
	97	{
3954d33a	98	VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
1e34d859 ME	99	int vdevice_off, node_off, ret;
1e34d859 ME	100	char *dt_name;
4040ab72 DG	101
	102	vdevice_off = fdt_path_offset(fdt, "/vdevice");
	103	if (vdevice_off < 0) {
	104	return vdevice_off;
	105	}
	106
c4eda5b7	107	dt_name = spapr_vio_get_dev_name(DEVICE(dev));
1e34d859	108	node_off = fdt_add_subnode(fdt, vdevice_off, dt_name);
4ecf8aa5	109	g_free(dt_name);
4040ab72 DG	110	if (node_off < 0) {
	111	return node_off;
	112	}
	113
	114	ret = fdt_setprop_cell(fdt, node_off, "reg", dev->reg);
	115	if (ret < 0) {
	116	return ret;
	117	}
	118
3954d33a	119	if (pc->dt_type) {
4040ab72	120	ret = fdt_setprop_string(fdt, node_off, "device_type",
3954d33a	121	pc->dt_type);
4040ab72 DG	122	if (ret < 0) {
	123	return ret;
	124	}
	125	}
	126
3954d33a	127	if (pc->dt_compatible) {
4040ab72	128	ret = fdt_setprop_string(fdt, node_off, "compatible",
3954d33a	129	pc->dt_compatible);
4040ab72 DG	130	if (ret < 0) {
	131	return ret;
	132	}
	133	}
	134
a307d594 AK	135	if (dev->irq) {
a307d594 AK	136	uint32_t ints_prop[] = {cpu_to_be32(dev->irq), 0};
00dc738d DG	137
	138	ret = fdt_setprop(fdt, node_off, "interrupts", ints_prop,
	139	sizeof(ints_prop));
	140	if (ret < 0) {
	141	return ret;
	142	}
	143	}
	144
2b7dc949	145	ret = spapr_tcet_dma_dt(fdt, node_off, "ibm,my-dma-window", dev->tcet);
ad0ebb91 DG	146	if (ret < 0) {
ad0ebb91 DG	147	return ret;
ee86dfee DG	148	}
ee86dfee DG	149
3954d33a AL	150	if (pc->devnode) {
3954d33a AL	151	ret = (pc->devnode)(dev, fdt, node_off);
4040ab72 DG	152	if (ret < 0) {
	153	return ret;
	154	}
	155	}
	156
	157	return node_off;
	158	}
4040ab72	159
b45d63b6 BH	160	/*
	161	* CRQ handling
	162	*/
b13ce26d	163	static target_ulong h_reg_crq(PowerPCCPU cpu, sPAPREnvironment spapr,
b45d63b6 BH	164	target_ulong opcode, target_ulong *args)
	165	{
	166	target_ulong reg = args[0];
	167	target_ulong queue_addr = args[1];
	168	target_ulong queue_len = args[2];
	169	VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
	170
	171	if (!dev) {
d9599c92	172	hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg);
b45d63b6 BH	173	return H_PARAMETER;
	174	}
	175
	176	/* We can't grok a queue size bigger than 256M for now */
	177	if (queue_len < 0x1000 \|\| queue_len > 0x10000000) {
d9599c92 DG	178	hcall_dprintf("Queue size too small or too big (0x" TARGET_FMT_lx
d9599c92 DG	179	")\n", queue_len);
b45d63b6 BH	180	return H_PARAMETER;
	181	}
	182
	183	/* Check queue alignment */
	184	if (queue_addr & 0xfff) {
d9599c92	185	hcall_dprintf("Queue not aligned (0x" TARGET_FMT_lx ")\n", queue_addr);
b45d63b6 BH	186	return H_PARAMETER;
	187	}
	188
	189	/* Check if device supports CRQs */
	190	if (!dev->crq.SendFunc) {
8e01f355	191	hcall_dprintf("Device does not support CRQ\n");
b45d63b6 BH	192	return H_NOT_FOUND;
	193	}
	194
b45d63b6 BH	195	/* Already a queue ? */
b45d63b6 BH	196	if (dev->crq.qsize) {
8e01f355	197	hcall_dprintf("CRQ already registered\n");
b45d63b6 BH	198	return H_RESOURCE;
	199	}
	200	dev->crq.qladdr = queue_addr;
	201	dev->crq.qsize = queue_len;
	202	dev->crq.qnext = 0;
	203
	204	dprintf("CRQ for dev 0x" TARGET_FMT_lx " registered at 0x"
	205	TARGET_FMT_lx "/0x" TARGET_FMT_lx "\n",
	206	reg, queue_addr, queue_len);
	207	return H_SUCCESS;
	208	}
	209
8e01f355 DG	210	static target_ulong free_crq(VIOsPAPRDevice *dev)
	211	{
	212	dev->crq.qladdr = 0;
	213	dev->crq.qsize = 0;
	214	dev->crq.qnext = 0;
	215
	216	dprintf("CRQ for dev 0x%" PRIx32 " freed\n", dev->reg);
	217
	218	return H_SUCCESS;
	219	}
	220
b13ce26d	221	static target_ulong h_free_crq(PowerPCCPU cpu, sPAPREnvironment spapr,
b45d63b6 BH	222	target_ulong opcode, target_ulong *args)
	223	{
	224	target_ulong reg = args[0];
	225	VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
	226
	227	if (!dev) {
d9599c92	228	hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg);
b45d63b6 BH	229	return H_PARAMETER;
	230	}
	231
8e01f355	232	return free_crq(dev);
b45d63b6 BH	233	}
b45d63b6 BH	234
b13ce26d	235	static target_ulong h_send_crq(PowerPCCPU cpu, sPAPREnvironment spapr,
b45d63b6 BH	236	target_ulong opcode, target_ulong *args)
	237	{
	238	target_ulong reg = args[0];
	239	target_ulong msg_hi = args[1];
	240	target_ulong msg_lo = args[2];
	241	VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
	242	uint64_t crq_mangle[2];
	243
	244	if (!dev) {
d9599c92	245	hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg);
b45d63b6 BH	246	return H_PARAMETER;
	247	}
	248	crq_mangle[0] = cpu_to_be64(msg_hi);
	249	crq_mangle[1] = cpu_to_be64(msg_lo);
	250
	251	if (dev->crq.SendFunc) {
	252	return dev->crq.SendFunc(dev, (uint8_t *)crq_mangle);
	253	}
	254
	255	return H_HARDWARE;
	256	}
	257
b13ce26d	258	static target_ulong h_enable_crq(PowerPCCPU cpu, sPAPREnvironment spapr,
b45d63b6 BH	259	target_ulong opcode, target_ulong *args)
	260	{
	261	target_ulong reg = args[0];
	262	VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
	263
	264	if (!dev) {
d9599c92	265	hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg);
b45d63b6 BH	266	return H_PARAMETER;
	267	}
	268
	269	return 0;
	270	}
	271
	272	/* Returns negative error, 0 success, or positive: queue full */
	273	int spapr_vio_send_crq(VIOsPAPRDevice dev, uint8_t crq)
	274	{
	275	int rc;
	276	uint8_t byte;
	277
	278	if (!dev->crq.qsize) {
	279	fprintf(stderr, "spapr_vio_send_creq on uninitialized queue\n");
	280	return -1;
	281	}
	282
	283	/* Maybe do a fast path for KVM just writing to the pages */
ad0ebb91	284	rc = spapr_vio_dma_read(dev, dev->crq.qladdr + dev->crq.qnext, &byte, 1);
b45d63b6 BH	285	if (rc) {
	286	return rc;
	287	}
	288	if (byte != 0) {
	289	return 1;
	290	}
	291
ad0ebb91	292	rc = spapr_vio_dma_write(dev, dev->crq.qladdr + dev->crq.qnext + 8,
b45d63b6 BH	293	&crq[8], 8);
	294	if (rc) {
	295	return rc;
	296	}
	297
	298	kvmppc_eieio();
	299
ad0ebb91	300	rc = spapr_vio_dma_write(dev, dev->crq.qladdr + dev->crq.qnext, crq, 8);
b45d63b6 BH	301	if (rc) {
	302	return rc;
	303	}
	304
	305	dev->crq.qnext = (dev->crq.qnext + 16) % dev->crq.qsize;
	306
	307	if (dev->signal_state & 1) {
a307d594	308	qemu_irq_pulse(spapr_vio_qirq(dev));
b45d63b6 BH	309	}
	310
	311	return 0;
	312	}
	313
08942ac1 BH	314	/* "quiesce" handling */
	315
	316	static void spapr_vio_quiesce_one(VIOsPAPRDevice *dev)
	317	{
2b7dc949 PB	318	if (dev->tcet) {
2b7dc949 PB	319	spapr_tce_reset(dev->tcet);
08942ac1	320	}
4dd96f24	321	free_crq(dev);
08942ac1 BH	322	}
08942ac1 BH	323
210b580b AL	324	static void rtas_set_tce_bypass(PowerPCCPU cpu, sPAPREnvironment spapr,
210b580b AL	325	uint32_t token,
08942ac1 BH	326	uint32_t nargs, target_ulong args,
	327	uint32_t nret, target_ulong rets)
	328	{
	329	VIOsPAPRBus *bus = spapr->vio_bus;
	330	VIOsPAPRDevice *dev;
	331	uint32_t unit, enable;
	332
	333	if (nargs != 2) {
	334	rtas_st(rets, 0, -3);
	335	return;
	336	}
	337	unit = rtas_ld(args, 0);
	338	enable = rtas_ld(args, 1);
	339	dev = spapr_vio_find_by_reg(bus, unit);
	340	if (!dev) {
	341	rtas_st(rets, 0, -3);
	342	return;
	343	}
ad0ebb91	344
2b7dc949	345	if (!dev->tcet) {
53724ee5 DG	346	rtas_st(rets, 0, -3);
53724ee5 DG	347	return;
08942ac1 BH	348	}
08942ac1 BH	349
2b7dc949	350	spapr_tce_set_bypass(dev->tcet, !!enable);
53724ee5	351
08942ac1 BH	352	rtas_st(rets, 0, 0);
	353	}
	354
210b580b AL	355	static void rtas_quiesce(PowerPCCPU cpu, sPAPREnvironment spapr,
210b580b AL	356	uint32_t token,
08942ac1 BH	357	uint32_t nargs, target_ulong args,
	358	uint32_t nret, target_ulong rets)
	359	{
	360	VIOsPAPRBus *bus = spapr->vio_bus;
0866aca1	361	BusChild *kid;
08942ac1 BH	362	VIOsPAPRDevice *dev = NULL;
	363
	364	if (nargs != 0) {
	365	rtas_st(rets, 0, -3);
	366	return;
	367	}
	368
0866aca1 AL	369	QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
0866aca1 AL	370	dev = (VIOsPAPRDevice *)kid->child;
08942ac1 BH	371	spapr_vio_quiesce_one(dev);
	372	}
	373
	374	rtas_st(rets, 0, 0);
	375	}
	376
d601fac4	377	static VIOsPAPRDevice reg_conflict(VIOsPAPRDevice dev)
9fc380d3	378	{
d601fac4	379	VIOsPAPRBus *bus = DO_UPCAST(VIOsPAPRBus, bus, dev->qdev.parent_bus);
0866aca1	380	BusChild *kid;
d601fac4	381	VIOsPAPRDevice *other;
9fc380d3 ME	382
9fc380d3 ME	383	/*
d601fac4 DG	384	* Check for a device other than the given one which is already
	385	* using the requested address. We have to open code this because
	386	* the given dev might already be in the list.
9fc380d3	387	*/
0866aca1	388	QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
fd506b4f	389	other = VIO_SPAPR_DEVICE(kid->child);
9fc380d3	390
d601fac4 DG	391	if (other != dev && other->reg == dev->reg) {
d601fac4 DG	392	return other;
9fc380d3 ME	393	}
	394	}
	395
	396	return 0;
	397	}
	398
b1c7f725	399	static void spapr_vio_busdev_reset(DeviceState *qdev)
8e01f355	400	{
fd506b4f	401	VIOsPAPRDevice *dev = VIO_SPAPR_DEVICE(qdev);
b1c7f725	402	VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
8e01f355	403
4dd96f24 DG	404	/* Shut down the request queue and TCEs if necessary */
	405	spapr_vio_quiesce_one(dev);
	406
	407	dev->signal_state = 0;
b1c7f725 DG	408
	409	if (pc->reset) {
	410	pc->reset(dev);
	411	}
8e01f355 DG	412	}
8e01f355 DG	413
d307af79	414	static int spapr_vio_busdev_init(DeviceState *qdev)
4040ab72	415	{
4040ab72	416	VIOsPAPRDevice dev = (VIOsPAPRDevice )qdev;
3954d33a	417	VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
4040ab72	418	char *id;
9fc380d3	419
d601fac4 DG	420	if (dev->reg != -1) {
	421	/*
	422	* Explicitly assigned address, just verify that no-one else
	423	* is using it. other mechanism). We have to open code this
	424	* rather than using spapr_vio_find_by_reg() because sdev
	425	* itself is already in the list.
	426	*/
	427	VIOsPAPRDevice *other = reg_conflict(dev);
	428
	429	if (other) {
	430	fprintf(stderr, "vio: %s and %s devices conflict at address %#x\n",
	431	object_get_typename(OBJECT(qdev)),
	432	object_get_typename(OBJECT(&other->qdev)),
	433	dev->reg);
	434	return -1;
	435	}
	436	} else {
	437	/* Need to assign an address */
	438	VIOsPAPRBus *bus = DO_UPCAST(VIOsPAPRBus, bus, dev->qdev.parent_bus);
	439
	440	do {
	441	dev->reg = bus->next_reg++;
	442	} while (reg_conflict(dev));
9fc380d3	443	}
4040ab72	444
1e34d859 ME	445	/* Don't overwrite ids assigned on the command line */
1e34d859 ME	446	if (!dev->qdev.id) {
c4eda5b7	447	id = spapr_vio_get_dev_name(DEVICE(dev));
1e34d859	448	dev->qdev.id = id;
4040ab72 DG	449	}
4040ab72 DG	450
a307d594 AK	451	dev->irq = spapr_allocate_msi(dev->irq);
a307d594 AK	452	if (!dev->irq) {
e6c866d4	453	return -1;
416343b1	454	}
4040ab72	455
53724ee5 DG	456	if (pc->rtce_window_size) {
53724ee5 DG	457	uint32_t liobn = SPAPR_VIO_BASE_LIOBN \| dev->reg;
84af6d9f	458	dev->tcet = spapr_tce_new_table(qdev, liobn, pc->rtce_window_size);
7dca8043	459	address_space_init(&dev->as, spapr_tce_get_iommu(dev->tcet), qdev->id);
53724ee5	460	}
ee86dfee	461
3954d33a	462	return pc->init(dev);
4040ab72 DG	463	}
4040ab72 DG	464
b13ce26d	465	static target_ulong h_vio_signal(PowerPCCPU cpu, sPAPREnvironment spapr,
00dc738d DG	466	target_ulong opcode,
	467	target_ulong *args)
	468	{
	469	target_ulong reg = args[0];
	470	target_ulong mode = args[1];
	471	VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
3954d33a	472	VIOsPAPRDeviceClass *pc;
00dc738d DG	473
	474	if (!dev) {
	475	return H_PARAMETER;
	476	}
	477
3954d33a	478	pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
00dc738d	479
3954d33a	480	if (mode & ~pc->signal_mask) {
00dc738d DG	481	return H_PARAMETER;
	482	}
	483
	484	dev->signal_state = mode;
	485
	486	return H_SUCCESS;
	487	}
	488
4040ab72 DG	489	VIOsPAPRBus *spapr_vio_bus_init(void)
	490	{
	491	VIOsPAPRBus *bus;
	492	BusState *qbus;
	493	DeviceState *dev;
4040ab72 DG	494
	495	/* Create bridge device */
	496	dev = qdev_create(NULL, "spapr-vio-bridge");
	497	qdev_init_nofail(dev);
	498
	499	/* Create bus on bridge device */
	500
0d936928	501	qbus = qbus_create(TYPE_SPAPR_VIO_BUS, dev, "spapr-vio");
4040ab72	502	bus = DO_UPCAST(VIOsPAPRBus, bus, qbus);
1ea1ce8a	503	bus->next_reg = 0x71000000;
4040ab72	504
00dc738d DG	505	/* hcall-vio */
	506	spapr_register_hypercall(H_VIO_SIGNAL, h_vio_signal);
	507
b45d63b6 BH	508	/* hcall-crq */
	509	spapr_register_hypercall(H_REG_CRQ, h_reg_crq);
	510	spapr_register_hypercall(H_FREE_CRQ, h_free_crq);
	511	spapr_register_hypercall(H_SEND_CRQ, h_send_crq);
	512	spapr_register_hypercall(H_ENABLE_CRQ, h_enable_crq);
	513
08942ac1 BH	514	/* RTAS calls */
	515	spapr_rtas_register("ibm,set-tce-bypass", rtas_set_tce_bypass);
	516	spapr_rtas_register("quiesce", rtas_quiesce);
	517
4040ab72 DG	518	return bus;
	519	}
	520
	521	/* Represents sPAPR hcall VIO devices */
	522
	523	static int spapr_vio_bridge_init(SysBusDevice *dev)
	524	{
	525	/* nothing */
	526	return 0;
	527	}
	528
999e12bb AL	529	static void spapr_vio_bridge_class_init(ObjectClass klass, void data)
999e12bb AL	530	{
39bffca2 AL	531	DeviceClass *dc = DEVICE_CLASS(klass);
39bffca2 AL	532	SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
999e12bb	533
39bffca2 AL	534	k->init = spapr_vio_bridge_init;
39bffca2 AL	535	dc->no_user = 1;
999e12bb AL	536	}
999e12bb AL	537
8c43a6f0	538	static const TypeInfo spapr_vio_bridge_info = {
39bffca2 AL	539	.name = "spapr-vio-bridge",
	540	.parent = TYPE_SYS_BUS_DEVICE,
	541	.instance_size = sizeof(SysBusDevice),
	542	.class_init = spapr_vio_bridge_class_init,
4040ab72 DG	543	};
4040ab72 DG	544
39bffca2 AL	545	static void vio_spapr_device_class_init(ObjectClass klass, void data)
	546	{
	547	DeviceClass *k = DEVICE_CLASS(klass);
	548	k->init = spapr_vio_busdev_init;
b1c7f725	549	k->reset = spapr_vio_busdev_reset;
0d936928	550	k->bus_type = TYPE_SPAPR_VIO_BUS;
bce54474	551	k->props = spapr_vio_props;
39bffca2 AL	552	}
39bffca2 AL	553
8c43a6f0	554	static const TypeInfo spapr_vio_type_info = {
3954d33a AL	555	.name = TYPE_VIO_SPAPR_DEVICE,
	556	.parent = TYPE_DEVICE,
	557	.instance_size = sizeof(VIOsPAPRDevice),
	558	.abstract = true,
	559	.class_size = sizeof(VIOsPAPRDeviceClass),
39bffca2	560	.class_init = vio_spapr_device_class_init,
3954d33a AL	561	};
3954d33a AL	562
83f7d43a	563	static void spapr_vio_register_types(void)
4040ab72	564	{
0d936928	565	type_register_static(&spapr_vio_bus_info);
39bffca2	566	type_register_static(&spapr_vio_bridge_info);
3954d33a	567	type_register_static(&spapr_vio_type_info);
4040ab72 DG	568	}
4040ab72 DG	569
83f7d43a	570	type_init(spapr_vio_register_types)
4040ab72	571
05c19438 DG	572	static int compare_reg(const void p1, const void p2)
	573	{
	574	VIOsPAPRDevice const dev1, dev2;
	575
	576	dev1 = (VIOsPAPRDevice )(DeviceState **)p1;
	577	dev2 = (VIOsPAPRDevice )(DeviceState **)p2;
	578
	579	if (dev1->reg < dev2->reg) {
	580	return -1;
	581	}
	582	if (dev1->reg == dev2->reg) {
	583	return 0;
	584	}
	585
	586	/* dev1->reg > dev2->reg */
	587	return 1;
	588	}
	589
4040ab72 DG	590	int spapr_populate_vdevice(VIOsPAPRBus bus, void fdt)
4040ab72 DG	591	{
05c19438	592	DeviceState qdev, *qdevs;
0866aca1	593	BusChild *kid;
05c19438	594	int i, num, ret = 0;
4040ab72	595
05c19438 DG	596	/* Count qdevs on the bus list */
05c19438 DG	597	num = 0;
0866aca1	598	QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
05c19438 DG	599	num++;
	600	}
	601
	602	/* Copy out into an array of pointers */
	603	qdevs = g_malloc(sizeof(qdev) * num);
	604	num = 0;
0866aca1 AL	605	QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
0866aca1 AL	606	qdevs[num++] = kid->child;
05c19438 DG	607	}
	608
	609	/* Sort the array */
	610	qsort(qdevs, num, sizeof(qdev), compare_reg);
	611
	612	/* Hack alert. Give the devices to libfdt in reverse order, we happen
	613	* to know that will mean they are in forward order in the tree. */
	614	for (i = num - 1; i >= 0; i--) {
	615	VIOsPAPRDevice dev = (VIOsPAPRDevice )(qdevs[i]);
4040ab72 DG	616
	617	ret = vio_make_devnode(dev, fdt);
	618
	619	if (ret < 0) {
05c19438	620	goto out;
4040ab72 DG	621	}
	622	}
	623
05c19438 DG	624	ret = 0;
	625	out:
	626	free(qdevs);
	627
	628	return ret;
4040ab72	629	}
68f3a94c DG	630
	631	int spapr_populate_chosen_stdout(void fdt, VIOsPAPRBus bus)
	632	{
	633	VIOsPAPRDevice *dev;
	634	char name, path;
	635	int ret, offset;
	636
	637	dev = spapr_vty_get_default(bus);
	638	if (!dev)
	639	return 0;
	640
	641	offset = fdt_path_offset(fdt, "/chosen");
	642	if (offset < 0) {
	643	return offset;
	644	}
	645
c4eda5b7	646	name = spapr_vio_get_dev_name(DEVICE(dev));
4ecf8aa5	647	path = g_strdup_printf("/vdevice/%s", name);
68f3a94c DG	648
68f3a94c DG	649	ret = fdt_setprop_string(fdt, offset, "linux,stdout-path", path);
4ecf8aa5 SW	650
	651	g_free(name);
	652	g_free(path);
68f3a94c DG	653
	654	return ret;
	655	}