[qemu.git] / hw / spapr_vio.c

/*
 * QEMU sPAPR VIO code
 *
 * Copyright (c) 2010 David Gibson, IBM Corporation <[email protected]>
 * Based on the s390 virtio bus code:
 * Copyright (c) 2009 Alexander Graf <[email protected]>
 *
 * 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.h"
#include "sysemu.h"
#include "boards.h"
#include "monitor.h"
#include "loader.h"
#include "elf.h"
#include "hw/sysbus.h"
#include "kvm.h"
#include "device_tree.h"
#include "kvm_ppc.h"

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

#ifdef CONFIG_FDT
#include <libfdt.h>
#endif /* CONFIG_FDT */

/* #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 const TypeInfo spapr_vio_bus_info = {
    .name = TYPE_SPAPR_VIO_BUS,
    .parent = TYPE_BUS,
    .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 char *vio_format_dev_name(VIOsPAPRDevice *dev)
{
    VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
    char *name;

    /* Device tree style name device@reg */
    if (asprintf(&name, "%s@%x", pc->dt_name, dev->reg) < 0) {
        return NULL;
    }

    return name;
}

#ifdef CONFIG_FDT
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 = vio_format_dev_name(dev);
    if (!dt_name) {
        return -ENOMEM;
    }

    node_off = fdt_add_subnode(fdt, vdevice_off, dt_name);
    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->dma);
    if (ret < 0) {
        return ret;
    }

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

    return node_off;
}
#endif /* CONFIG_FDT */

/*
 * CRQ handling
 */
static target_ulong h_reg_crq(CPUPPCState *env, 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(CPUPPCState *env, 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(CPUPPCState *env, 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(CPUPPCState *env, 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)
{
    VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
    uint32_t liobn = SPAPR_VIO_BASE_LIOBN | dev->reg;

    if (dev->dma) {
        spapr_tce_free(dev->dma);
    }
    dev->dma = spapr_tce_new_dma_context(liobn, pc->rtce_window_size);

    dev->crq.qladdr = 0;
    dev->crq.qsize = 0;
    dev->crq.qnext = 0;
}

static void rtas_set_tce_bypass(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 (enable) {
        spapr_tce_free(dev->dma);
        dev->dma = NULL;
    } else {
        VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
        uint32_t liobn = SPAPR_VIO_BASE_LIOBN | dev->reg;

        dev->dma = spapr_tce_new_dma_context(liobn, pc->rtce_window_size);
    }

    rtas_st(rets, 0, 0);
}

static void rtas_quiesce(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 = DO_UPCAST(VIOsPAPRDevice, qdev, kid->child);

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

    return 0;
}

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

    if (dev->crq.qsize) {
        free_crq(dev);
    }

    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);
    uint32_t liobn;
    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 = vio_format_dev_name(dev);
        if (!id) {
            return -1;
        }
        dev->qdev.id = id;
    }

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

    liobn = SPAPR_VIO_BASE_LIOBN | dev->reg;
    dev->dma = spapr_tce_new_dma_context(liobn, pc->rtce_window_size);

    return pc->init(dev);
}

static target_ulong h_vio_signal(CPUPPCState *env, 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 = 0x1000;

    /* 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 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 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)

#ifdef CONFIG_FDT
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 = vio_format_dev_name(dev);
    if (!name) {
        return -ENOMEM;
    }

    if (asprintf(&path, "/vdevice/%s", name) < 0) {
        path = NULL;
        ret = -ENOMEM;
        goto out;
    }

    ret = fdt_setprop_string(fdt, offset, "linux,stdout-path", path);
out:
    free(name);
    free(path);

    return ret;
}
#endif /* CONFIG_FDT */
Commit	Line	Data
4040ab72 DG	1	/*
	2	* QEMU sPAPR VIO code
	3	*
	4	* Copyright (c) 2010 David Gibson, IBM Corporation <[email protected]>
	5	* Based on the s390 virtio bus code:
	6	* Copyright (c) 2009 Alexander Graf <[email protected]>
	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
	22	#include "hw.h"
	23	#include "sysemu.h"
	24	#include "boards.h"
	25	#include "monitor.h"
	26	#include "loader.h"
	27	#include "elf.h"
	28	#include "hw/sysbus.h"
	29	#include "kvm.h"
	30	#include "device_tree.h"
b45d63b6	31	#include "kvm_ppc.h"
4040ab72 DG	32
	33	#include "hw/spapr.h"
	34	#include "hw/spapr_vio.h"
277f9acf	35	#include "hw/xics.h"
4040ab72 DG	36
	37	#ifdef CONFIG_FDT
	38	#include <libfdt.h>
	39	#endif /* CONFIG_FDT */
	40
	41	/* #define DEBUG_SPAPR */
	42
	43	#ifdef DEBUG_SPAPR
	44	#define dprintf(fmt, ...) \
	45	do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
	46	#else
	47	#define dprintf(fmt, ...) \
	48	do { } while (0)
	49	#endif
	50
3cb75a7c	51	static Property spapr_vio_props[] = {
a307d594	52	DEFINE_PROP_UINT32("irq", VIOsPAPRDevice, irq, 0), \
3cb75a7c PB	53	DEFINE_PROP_END_OF_LIST(),
	54	};
	55
0d936928 AL	56	static const TypeInfo spapr_vio_bus_info = {
	57	.name = TYPE_SPAPR_VIO_BUS,
	58	.parent = TYPE_BUS,
	59	.instance_size = sizeof(VIOsPAPRBus),
4040ab72 DG	60	};
	61
	62	VIOsPAPRDevice spapr_vio_find_by_reg(VIOsPAPRBus bus, uint32_t reg)
	63	{
0866aca1	64	BusChild *kid;
4040ab72 DG	65	VIOsPAPRDevice *dev = NULL;
4040ab72 DG	66
0866aca1 AL	67	QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
0866aca1 AL	68	dev = (VIOsPAPRDevice *)kid->child;
4040ab72	69	if (dev->reg == reg) {
5435352c	70	return dev;
4040ab72 DG	71	}
	72	}
	73
5435352c	74	return NULL;
4040ab72 DG	75	}
4040ab72 DG	76
1e34d859 ME	77	static char vio_format_dev_name(VIOsPAPRDevice dev)
1e34d859 ME	78	{
3954d33a	79	VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
1e34d859 ME	80	char *name;
	81
	82	/* Device tree style name device@reg */
3954d33a	83	if (asprintf(&name, "%s@%x", pc->dt_name, dev->reg) < 0) {
1e34d859 ME	84	return NULL;
	85	}
	86
	87	return name;
	88	}
	89
4040ab72 DG	90	#ifdef CONFIG_FDT
	91	static int vio_make_devnode(VIOsPAPRDevice *dev,
	92	void *fdt)
	93	{
3954d33a	94	VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
1e34d859 ME	95	int vdevice_off, node_off, ret;
1e34d859 ME	96	char *dt_name;
4040ab72 DG	97
	98	vdevice_off = fdt_path_offset(fdt, "/vdevice");
	99	if (vdevice_off < 0) {
	100	return vdevice_off;
	101	}
	102
1e34d859 ME	103	dt_name = vio_format_dev_name(dev);
	104	if (!dt_name) {
	105	return -ENOMEM;
	106	}
	107
	108	node_off = fdt_add_subnode(fdt, vdevice_off, dt_name);
	109	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
5c4cbcf2	145	ret = spapr_tcet_dma_dt(fdt, node_off, "ibm,my-dma-window", dev->dma);
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	}
	159	#endif /* CONFIG_FDT */
	160
b45d63b6 BH	161	/*
	162	* CRQ handling
	163	*/
e2684c0b	164	static target_ulong h_reg_crq(CPUPPCState env, sPAPREnvironment spapr,
b45d63b6 BH	165	target_ulong opcode, target_ulong *args)
	166	{
	167	target_ulong reg = args[0];
	168	target_ulong queue_addr = args[1];
	169	target_ulong queue_len = args[2];
	170	VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
	171
	172	if (!dev) {
d9599c92	173	hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg);
b45d63b6 BH	174	return H_PARAMETER;
	175	}
	176
	177	/* We can't grok a queue size bigger than 256M for now */
	178	if (queue_len < 0x1000 \|\| queue_len > 0x10000000) {
d9599c92 DG	179	hcall_dprintf("Queue size too small or too big (0x" TARGET_FMT_lx
d9599c92 DG	180	")\n", queue_len);
b45d63b6 BH	181	return H_PARAMETER;
	182	}
	183
	184	/* Check queue alignment */
	185	if (queue_addr & 0xfff) {
d9599c92	186	hcall_dprintf("Queue not aligned (0x" TARGET_FMT_lx ")\n", queue_addr);
b45d63b6 BH	187	return H_PARAMETER;
	188	}
	189
	190	/* Check if device supports CRQs */
	191	if (!dev->crq.SendFunc) {
8e01f355	192	hcall_dprintf("Device does not support CRQ\n");
b45d63b6 BH	193	return H_NOT_FOUND;
	194	}
	195
b45d63b6 BH	196	/* Already a queue ? */
b45d63b6 BH	197	if (dev->crq.qsize) {
8e01f355	198	hcall_dprintf("CRQ already registered\n");
b45d63b6 BH	199	return H_RESOURCE;
	200	}
	201	dev->crq.qladdr = queue_addr;
	202	dev->crq.qsize = queue_len;
	203	dev->crq.qnext = 0;
	204
	205	dprintf("CRQ for dev 0x" TARGET_FMT_lx " registered at 0x"
	206	TARGET_FMT_lx "/0x" TARGET_FMT_lx "\n",
	207	reg, queue_addr, queue_len);
	208	return H_SUCCESS;
	209	}
	210
8e01f355 DG	211	static target_ulong free_crq(VIOsPAPRDevice *dev)
	212	{
	213	dev->crq.qladdr = 0;
	214	dev->crq.qsize = 0;
	215	dev->crq.qnext = 0;
	216
	217	dprintf("CRQ for dev 0x%" PRIx32 " freed\n", dev->reg);
	218
	219	return H_SUCCESS;
	220	}
	221
e2684c0b	222	static target_ulong h_free_crq(CPUPPCState env, sPAPREnvironment spapr,
b45d63b6 BH	223	target_ulong opcode, target_ulong *args)
	224	{
	225	target_ulong reg = args[0];
	226	VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
	227
	228	if (!dev) {
d9599c92	229	hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg);
b45d63b6 BH	230	return H_PARAMETER;
	231	}
	232
8e01f355	233	return free_crq(dev);
b45d63b6 BH	234	}
b45d63b6 BH	235
e2684c0b	236	static target_ulong h_send_crq(CPUPPCState env, sPAPREnvironment spapr,
b45d63b6 BH	237	target_ulong opcode, target_ulong *args)
	238	{
	239	target_ulong reg = args[0];
	240	target_ulong msg_hi = args[1];
	241	target_ulong msg_lo = args[2];
	242	VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
	243	uint64_t crq_mangle[2];
	244
	245	if (!dev) {
d9599c92	246	hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg);
b45d63b6 BH	247	return H_PARAMETER;
	248	}
	249	crq_mangle[0] = cpu_to_be64(msg_hi);
	250	crq_mangle[1] = cpu_to_be64(msg_lo);
	251
	252	if (dev->crq.SendFunc) {
	253	return dev->crq.SendFunc(dev, (uint8_t *)crq_mangle);
	254	}
	255
	256	return H_HARDWARE;
	257	}
	258
e2684c0b	259	static target_ulong h_enable_crq(CPUPPCState env, sPAPREnvironment spapr,
b45d63b6 BH	260	target_ulong opcode, target_ulong *args)
	261	{
	262	target_ulong reg = args[0];
	263	VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
	264
	265	if (!dev) {
d9599c92	266	hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg);
b45d63b6 BH	267	return H_PARAMETER;
	268	}
	269
	270	return 0;
	271	}
	272
	273	/* Returns negative error, 0 success, or positive: queue full */
	274	int spapr_vio_send_crq(VIOsPAPRDevice dev, uint8_t crq)
	275	{
	276	int rc;
	277	uint8_t byte;
	278
	279	if (!dev->crq.qsize) {
	280	fprintf(stderr, "spapr_vio_send_creq on uninitialized queue\n");
	281	return -1;
	282	}
	283
	284	/* Maybe do a fast path for KVM just writing to the pages */
ad0ebb91	285	rc = spapr_vio_dma_read(dev, dev->crq.qladdr + dev->crq.qnext, &byte, 1);
b45d63b6 BH	286	if (rc) {
	287	return rc;
	288	}
	289	if (byte != 0) {
	290	return 1;
	291	}
	292
ad0ebb91	293	rc = spapr_vio_dma_write(dev, dev->crq.qladdr + dev->crq.qnext + 8,
b45d63b6 BH	294	&crq[8], 8);
	295	if (rc) {
	296	return rc;
	297	}
	298
	299	kvmppc_eieio();
	300
ad0ebb91	301	rc = spapr_vio_dma_write(dev, dev->crq.qladdr + dev->crq.qnext, crq, 8);
b45d63b6 BH	302	if (rc) {
	303	return rc;
	304	}
	305
	306	dev->crq.qnext = (dev->crq.qnext + 16) % dev->crq.qsize;
	307
	308	if (dev->signal_state & 1) {
a307d594	309	qemu_irq_pulse(spapr_vio_qirq(dev));
b45d63b6 BH	310	}
	311
	312	return 0;
	313	}
	314
08942ac1 BH	315	/* "quiesce" handling */
	316
	317	static void spapr_vio_quiesce_one(VIOsPAPRDevice *dev)
	318	{
ad0ebb91 DG	319	VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
ad0ebb91 DG	320	uint32_t liobn = SPAPR_VIO_BASE_LIOBN \| dev->reg;
08942ac1	321
ad0ebb91 DG	322	if (dev->dma) {
ad0ebb91 DG	323	spapr_tce_free(dev->dma);
08942ac1	324	}
ad0ebb91	325	dev->dma = spapr_tce_new_dma_context(liobn, pc->rtce_window_size);
08942ac1 BH	326
	327	dev->crq.qladdr = 0;
	328	dev->crq.qsize = 0;
	329	dev->crq.qnext = 0;
	330	}
	331
	332	static void rtas_set_tce_bypass(sPAPREnvironment *spapr, uint32_t token,
	333	uint32_t nargs, target_ulong args,
	334	uint32_t nret, target_ulong rets)
	335	{
	336	VIOsPAPRBus *bus = spapr->vio_bus;
	337	VIOsPAPRDevice *dev;
	338	uint32_t unit, enable;
	339
	340	if (nargs != 2) {
	341	rtas_st(rets, 0, -3);
	342	return;
	343	}
	344	unit = rtas_ld(args, 0);
	345	enable = rtas_ld(args, 1);
	346	dev = spapr_vio_find_by_reg(bus, unit);
	347	if (!dev) {
	348	rtas_st(rets, 0, -3);
	349	return;
	350	}
	351	if (enable) {
ad0ebb91 DG	352	spapr_tce_free(dev->dma);
ad0ebb91 DG	353	dev->dma = NULL;
08942ac1	354	} else {
ad0ebb91 DG	355	VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
	356	uint32_t liobn = SPAPR_VIO_BASE_LIOBN \| dev->reg;
	357
	358	dev->dma = spapr_tce_new_dma_context(liobn, pc->rtce_window_size);
08942ac1 BH	359	}
	360
	361	rtas_st(rets, 0, 0);
	362	}
	363
	364	static void rtas_quiesce(sPAPREnvironment *spapr, uint32_t token,
	365	uint32_t nargs, target_ulong args,
	366	uint32_t nret, target_ulong rets)
	367	{
	368	VIOsPAPRBus *bus = spapr->vio_bus;
0866aca1	369	BusChild *kid;
08942ac1 BH	370	VIOsPAPRDevice *dev = NULL;
	371
	372	if (nargs != 0) {
	373	rtas_st(rets, 0, -3);
	374	return;
	375	}
	376
0866aca1 AL	377	QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
0866aca1 AL	378	dev = (VIOsPAPRDevice *)kid->child;
08942ac1 BH	379	spapr_vio_quiesce_one(dev);
	380	}
	381
	382	rtas_st(rets, 0, 0);
	383	}
	384
d601fac4	385	static VIOsPAPRDevice reg_conflict(VIOsPAPRDevice dev)
9fc380d3	386	{
d601fac4	387	VIOsPAPRBus *bus = DO_UPCAST(VIOsPAPRBus, bus, dev->qdev.parent_bus);
0866aca1	388	BusChild *kid;
d601fac4	389	VIOsPAPRDevice *other;
9fc380d3 ME	390
9fc380d3 ME	391	/*
d601fac4 DG	392	* Check for a device other than the given one which is already
	393	* using the requested address. We have to open code this because
	394	* the given dev might already be in the list.
9fc380d3	395	*/
0866aca1 AL	396	QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
0866aca1 AL	397	other = DO_UPCAST(VIOsPAPRDevice, qdev, kid->child);
9fc380d3	398
d601fac4 DG	399	if (other != dev && other->reg == dev->reg) {
d601fac4 DG	400	return other;
9fc380d3 ME	401	}
	402	}
	403
	404	return 0;
	405	}
	406
b1c7f725	407	static void spapr_vio_busdev_reset(DeviceState *qdev)
8e01f355	408	{
b1c7f725 DG	409	VIOsPAPRDevice *dev = DO_UPCAST(VIOsPAPRDevice, qdev, qdev);
b1c7f725 DG	410	VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
8e01f355 DG	411
	412	if (dev->crq.qsize) {
	413	free_crq(dev);
	414	}
b1c7f725 DG	415
	416	if (pc->reset) {
	417	pc->reset(dev);
	418	}
8e01f355 DG	419	}
8e01f355 DG	420
d307af79	421	static int spapr_vio_busdev_init(DeviceState *qdev)
4040ab72	422	{
4040ab72	423	VIOsPAPRDevice dev = (VIOsPAPRDevice )qdev;
3954d33a	424	VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
ad0ebb91	425	uint32_t liobn;
4040ab72	426	char *id;
9fc380d3	427
d601fac4 DG	428	if (dev->reg != -1) {
	429	/*
	430	* Explicitly assigned address, just verify that no-one else
	431	* is using it. other mechanism). We have to open code this
	432	* rather than using spapr_vio_find_by_reg() because sdev
	433	* itself is already in the list.
	434	*/
	435	VIOsPAPRDevice *other = reg_conflict(dev);
	436
	437	if (other) {
	438	fprintf(stderr, "vio: %s and %s devices conflict at address %#x\n",
	439	object_get_typename(OBJECT(qdev)),
	440	object_get_typename(OBJECT(&other->qdev)),
	441	dev->reg);
	442	return -1;
	443	}
	444	} else {
	445	/* Need to assign an address */
	446	VIOsPAPRBus *bus = DO_UPCAST(VIOsPAPRBus, bus, dev->qdev.parent_bus);
	447
	448	do {
	449	dev->reg = bus->next_reg++;
	450	} while (reg_conflict(dev));
9fc380d3	451	}
4040ab72	452
1e34d859 ME	453	/* Don't overwrite ids assigned on the command line */
	454	if (!dev->qdev.id) {
	455	id = vio_format_dev_name(dev);
	456	if (!id) {
	457	return -1;
	458	}
	459	dev->qdev.id = id;
4040ab72 DG	460	}
4040ab72 DG	461
a307d594 AK	462	dev->irq = spapr_allocate_msi(dev->irq);
a307d594 AK	463	if (!dev->irq) {
e6c866d4	464	return -1;
416343b1	465	}
4040ab72	466
ad0ebb91 DG	467	liobn = SPAPR_VIO_BASE_LIOBN \| dev->reg;
ad0ebb91 DG	468	dev->dma = spapr_tce_new_dma_context(liobn, pc->rtce_window_size);
ee86dfee	469
3954d33a	470	return pc->init(dev);
4040ab72 DG	471	}
4040ab72 DG	472
e2684c0b	473	static target_ulong h_vio_signal(CPUPPCState env, sPAPREnvironment spapr,
00dc738d DG	474	target_ulong opcode,
	475	target_ulong *args)
	476	{
	477	target_ulong reg = args[0];
	478	target_ulong mode = args[1];
	479	VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
3954d33a	480	VIOsPAPRDeviceClass *pc;
00dc738d DG	481
	482	if (!dev) {
	483	return H_PARAMETER;
	484	}
	485
3954d33a	486	pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
00dc738d	487
3954d33a	488	if (mode & ~pc->signal_mask) {
00dc738d DG	489	return H_PARAMETER;
	490	}
	491
	492	dev->signal_state = mode;
	493
	494	return H_SUCCESS;
	495	}
	496
4040ab72 DG	497	VIOsPAPRBus *spapr_vio_bus_init(void)
	498	{
	499	VIOsPAPRBus *bus;
	500	BusState *qbus;
	501	DeviceState *dev;
4040ab72 DG	502
	503	/* Create bridge device */
	504	dev = qdev_create(NULL, "spapr-vio-bridge");
	505	qdev_init_nofail(dev);
	506
	507	/* Create bus on bridge device */
	508
0d936928	509	qbus = qbus_create(TYPE_SPAPR_VIO_BUS, dev, "spapr-vio");
4040ab72	510	bus = DO_UPCAST(VIOsPAPRBus, bus, qbus);
d601fac4	511	bus->next_reg = 0x1000;
4040ab72	512
00dc738d DG	513	/* hcall-vio */
	514	spapr_register_hypercall(H_VIO_SIGNAL, h_vio_signal);
	515
b45d63b6 BH	516	/* hcall-crq */
	517	spapr_register_hypercall(H_REG_CRQ, h_reg_crq);
	518	spapr_register_hypercall(H_FREE_CRQ, h_free_crq);
	519	spapr_register_hypercall(H_SEND_CRQ, h_send_crq);
	520	spapr_register_hypercall(H_ENABLE_CRQ, h_enable_crq);
	521
08942ac1 BH	522	/* RTAS calls */
	523	spapr_rtas_register("ibm,set-tce-bypass", rtas_set_tce_bypass);
	524	spapr_rtas_register("quiesce", rtas_quiesce);
	525
4040ab72 DG	526	return bus;
	527	}
	528
	529	/* Represents sPAPR hcall VIO devices */
	530
	531	static int spapr_vio_bridge_init(SysBusDevice *dev)
	532	{
	533	/* nothing */
	534	return 0;
	535	}
	536
999e12bb AL	537	static void spapr_vio_bridge_class_init(ObjectClass klass, void data)
999e12bb AL	538	{
39bffca2 AL	539	DeviceClass *dc = DEVICE_CLASS(klass);
39bffca2 AL	540	SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
999e12bb	541
39bffca2 AL	542	k->init = spapr_vio_bridge_init;
39bffca2 AL	543	dc->no_user = 1;
999e12bb AL	544	}
999e12bb AL	545
39bffca2 AL	546	static TypeInfo spapr_vio_bridge_info = {
	547	.name = "spapr-vio-bridge",
	548	.parent = TYPE_SYS_BUS_DEVICE,
	549	.instance_size = sizeof(SysBusDevice),
	550	.class_init = spapr_vio_bridge_class_init,
4040ab72 DG	551	};
4040ab72 DG	552
39bffca2 AL	553	static void vio_spapr_device_class_init(ObjectClass klass, void data)
	554	{
	555	DeviceClass *k = DEVICE_CLASS(klass);
	556	k->init = spapr_vio_busdev_init;
b1c7f725	557	k->reset = spapr_vio_busdev_reset;
0d936928	558	k->bus_type = TYPE_SPAPR_VIO_BUS;
bce54474	559	k->props = spapr_vio_props;
39bffca2 AL	560	}
39bffca2 AL	561
3954d33a AL	562	static TypeInfo spapr_vio_type_info = {
	563	.name = TYPE_VIO_SPAPR_DEVICE,
	564	.parent = TYPE_DEVICE,
	565	.instance_size = sizeof(VIOsPAPRDevice),
	566	.abstract = true,
	567	.class_size = sizeof(VIOsPAPRDeviceClass),
39bffca2	568	.class_init = vio_spapr_device_class_init,
3954d33a AL	569	};
3954d33a AL	570
83f7d43a	571	static void spapr_vio_register_types(void)
4040ab72	572	{
0d936928	573	type_register_static(&spapr_vio_bus_info);
39bffca2	574	type_register_static(&spapr_vio_bridge_info);
3954d33a	575	type_register_static(&spapr_vio_type_info);
4040ab72 DG	576	}
4040ab72 DG	577
83f7d43a	578	type_init(spapr_vio_register_types)
4040ab72 DG	579
4040ab72 DG	580	#ifdef CONFIG_FDT
05c19438 DG	581	static int compare_reg(const void p1, const void p2)
	582	{
	583	VIOsPAPRDevice const dev1, dev2;
	584
	585	dev1 = (VIOsPAPRDevice )(DeviceState **)p1;
	586	dev2 = (VIOsPAPRDevice )(DeviceState **)p2;
	587
	588	if (dev1->reg < dev2->reg) {
	589	return -1;
	590	}
	591	if (dev1->reg == dev2->reg) {
	592	return 0;
	593	}
	594
	595	/* dev1->reg > dev2->reg */
	596	return 1;
	597	}
	598
4040ab72 DG	599	int spapr_populate_vdevice(VIOsPAPRBus bus, void fdt)
4040ab72 DG	600	{
05c19438	601	DeviceState qdev, *qdevs;
0866aca1	602	BusChild *kid;
05c19438	603	int i, num, ret = 0;
4040ab72	604
05c19438 DG	605	/* Count qdevs on the bus list */
05c19438 DG	606	num = 0;
0866aca1	607	QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
05c19438 DG	608	num++;
	609	}
	610
	611	/* Copy out into an array of pointers */
	612	qdevs = g_malloc(sizeof(qdev) * num);
	613	num = 0;
0866aca1 AL	614	QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
0866aca1 AL	615	qdevs[num++] = kid->child;
05c19438 DG	616	}
	617
	618	/* Sort the array */
	619	qsort(qdevs, num, sizeof(qdev), compare_reg);
	620
	621	/* Hack alert. Give the devices to libfdt in reverse order, we happen
	622	* to know that will mean they are in forward order in the tree. */
	623	for (i = num - 1; i >= 0; i--) {
	624	VIOsPAPRDevice dev = (VIOsPAPRDevice )(qdevs[i]);
4040ab72 DG	625
	626	ret = vio_make_devnode(dev, fdt);
	627
	628	if (ret < 0) {
05c19438	629	goto out;
4040ab72 DG	630	}
	631	}
	632
05c19438 DG	633	ret = 0;
	634	out:
	635	free(qdevs);
	636
	637	return ret;
4040ab72	638	}
68f3a94c DG	639
	640	int spapr_populate_chosen_stdout(void fdt, VIOsPAPRBus bus)
	641	{
	642	VIOsPAPRDevice *dev;
	643	char name, path;
	644	int ret, offset;
	645
	646	dev = spapr_vty_get_default(bus);
	647	if (!dev)
	648	return 0;
	649
	650	offset = fdt_path_offset(fdt, "/chosen");
	651	if (offset < 0) {
	652	return offset;
	653	}
	654
	655	name = vio_format_dev_name(dev);
	656	if (!name) {
	657	return -ENOMEM;
	658	}
	659
	660	if (asprintf(&path, "/vdevice/%s", name) < 0) {
	661	path = NULL;
	662	ret = -ENOMEM;
	663	goto out;
	664	}
	665
	666	ret = fdt_setprop_string(fdt, offset, "linux,stdout-path", path);
	667	out:
	668	free(name);
	669	free(path);
	670
	671	return ret;
	672	}
4040ab72	673	#endif /* CONFIG_FDT */