[qemu.git] / hw / pci-hotplug.c

/*
 * QEMU PCI hotplug support
 *
 * Copyright (c) 2004 Fabrice Bellard
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#include "hw.h"
#include "boards.h"
#include "pci.h"
#include "net.h"
#include "pc.h"
#include "monitor.h"
#include "scsi.h"
#include "virtio-blk.h"
#include "qemu-config.h"
#include "blockdev.h"

#if defined(TARGET_I386)
static PCIDevice *qemu_pci_hot_add_nic(Monitor *mon,
                                       const char *devaddr,
                                       const char *opts_str)
{
    QemuOpts *opts;
    PCIBus *bus;
    int ret, devfn;

    bus = pci_get_bus_devfn(&devfn, devaddr);
    if (!bus) {
        monitor_printf(mon, "Invalid PCI device address %s\n", devaddr);
        return NULL;
    }
    if (!((BusState*)bus)->allow_hotplug) {
        monitor_printf(mon, "PCI bus doesn't support hotplug\n");
        return NULL;
    }

    opts = qemu_opts_parse(qemu_find_opts("net"), opts_str ? opts_str : "", 0);
    if (!opts) {
        return NULL;
    }

    qemu_opt_set(opts, "type", "nic");

    ret = net_client_init(mon, opts, 0);
    if (ret < 0)
        return NULL;
    if (nd_table[ret].devaddr) {
        monitor_printf(mon, "Parameter addr not supported\n");
        return NULL;
    }
    return pci_nic_init(&nd_table[ret], "rtl8139", devaddr);
}

static int scsi_hot_add(Monitor *mon, DeviceState *adapter,
                        DriveInfo *dinfo, int printinfo)
{
    SCSIBus *scsibus;
    SCSIDevice *scsidev;

    scsibus = DO_UPCAST(SCSIBus, qbus, QLIST_FIRST(&adapter->child_bus));
    if (!scsibus || strcmp(scsibus->qbus.info->name, "SCSI") != 0) {
        error_report("Device is not a SCSI adapter");
        return -1;
    }

    /*
     * drive_init() tries to find a default for dinfo->unit.  Doesn't
     * work at all for hotplug though as we assign the device to a
     * specific bus instead of the first bus with spare scsi ids.
     *
     * Ditch the calculated value and reload from option string (if
     * specified).
     */
    dinfo->unit = qemu_opt_get_number(dinfo->opts, "unit", -1);
    scsidev = scsi_bus_legacy_add_drive(scsibus, dinfo->bdrv, dinfo->unit);
    if (!scsidev) {
        return -1;
    }
    dinfo->unit = scsidev->id;

    if (printinfo)
        monitor_printf(mon, "OK bus %d, unit %d\n",
                       scsibus->busnr, scsidev->id);
    return 0;
}

void drive_hot_add(Monitor *mon, const QDict *qdict)
{
    int dom, pci_bus;
    unsigned slot;
    int type;
    PCIDevice *dev;
    DriveInfo *dinfo = NULL;
    const char *pci_addr = qdict_get_str(qdict, "pci_addr");
    const char *opts = qdict_get_str(qdict, "opts");

    dinfo = add_init_drive(opts);
    if (!dinfo)
        goto err;
    if (dinfo->devaddr) {
        monitor_printf(mon, "Parameter addr not supported\n");
        goto err;
    }
    type = dinfo->type;

    switch (type) {
    case IF_SCSI:
        if (pci_read_devaddr(mon, pci_addr, &dom, &pci_bus, &slot)) {
            goto err;
        }
        dev = pci_find_device(pci_find_root_bus(dom), pci_bus, slot, 0);
        if (!dev) {
            monitor_printf(mon, "no pci device with address %s\n", pci_addr);
            goto err;
        }
        if (scsi_hot_add(mon, &dev->qdev, dinfo, 1) != 0) {
            goto err;
        }
        break;
    case IF_NONE:
        monitor_printf(mon, "OK\n");
        break;
    default:
        monitor_printf(mon, "Can't hot-add drive to type %d\n", type);
        goto err;
    }
    return;

err:
    if (dinfo)
        drive_uninit(dinfo);
    return;
}

static PCIDevice *qemu_pci_hot_add_storage(Monitor *mon,
                                           const char *devaddr,
                                           const char *opts)
{
    PCIDevice *dev;
    DriveInfo *dinfo = NULL;
    int type = -1;
    char buf[128];
    PCIBus *bus;
    int devfn;

    if (get_param_value(buf, sizeof(buf), "if", opts)) {
        if (!strcmp(buf, "scsi"))
            type = IF_SCSI;
        else if (!strcmp(buf, "virtio")) {
            type = IF_VIRTIO;
        } else {
            monitor_printf(mon, "type %s not a hotpluggable PCI device.\n", buf);
            return NULL;
        }
    } else {
        monitor_printf(mon, "no if= specified\n");
        return NULL;
    }

    if (get_param_value(buf, sizeof(buf), "file", opts)) {
        dinfo = add_init_drive(opts);
        if (!dinfo)
            return NULL;
        if (dinfo->devaddr) {
            monitor_printf(mon, "Parameter addr not supported\n");
            return NULL;
        }
    } else {
        dinfo = NULL;
    }

    bus = pci_get_bus_devfn(&devfn, devaddr);
    if (!bus) {
        monitor_printf(mon, "Invalid PCI device address %s\n", devaddr);
        return NULL;
    }
    if (!((BusState*)bus)->allow_hotplug) {
        monitor_printf(mon, "PCI bus doesn't support hotplug\n");
        return NULL;
    }

    switch (type) {
    case IF_SCSI:
        dev = pci_create(bus, devfn, "lsi53c895a");
        if (qdev_init(&dev->qdev) < 0)
            dev = NULL;
        if (dev && dinfo) {
            if (scsi_hot_add(mon, &dev->qdev, dinfo, 0) != 0) {
                qdev_unplug(&dev->qdev);
                dev = NULL;
            }
        }
        break;
    case IF_VIRTIO:
        if (!dinfo) {
            monitor_printf(mon, "virtio requires a backing file/device.\n");
            return NULL;
        }
        dev = pci_create(bus, devfn, "virtio-blk-pci");
        if (qdev_prop_set_drive(&dev->qdev, "drive", dinfo->bdrv) < 0) {
            qdev_free(&dev->qdev);
            dev = NULL;
            break;
        }
        if (qdev_init(&dev->qdev) < 0)
            dev = NULL;
        break;
    default:
        dev = NULL;
    }
    return dev;
}

void pci_device_hot_add(Monitor *mon, const QDict *qdict)
{
    PCIDevice *dev = NULL;
    const char *pci_addr = qdict_get_str(qdict, "pci_addr");
    const char *type = qdict_get_str(qdict, "type");
    const char *opts = qdict_get_try_str(qdict, "opts");

    /* strip legacy tag */
    if (!strncmp(pci_addr, "pci_addr=", 9)) {
        pci_addr += 9;
    }

    if (!opts) {
        opts = "";
    }

    if (!strcmp(pci_addr, "auto"))
        pci_addr = NULL;

    if (strcmp(type, "nic") == 0) {
        dev = qemu_pci_hot_add_nic(mon, pci_addr, opts);
    } else if (strcmp(type, "storage") == 0) {
        dev = qemu_pci_hot_add_storage(mon, pci_addr, opts);
    } else {
        monitor_printf(mon, "invalid type: %s\n", type);
    }

    if (dev) {
        monitor_printf(mon, "OK domain %d, bus %d, slot %d, function %d\n",
                       pci_find_domain(dev->bus),
                       pci_bus_num(dev->bus), PCI_SLOT(dev->devfn),
                       PCI_FUNC(dev->devfn));
    } else
        monitor_printf(mon, "failed to add %s\n", opts);
}
#endif

static int pci_device_hot_remove(Monitor *mon, const char *pci_addr)
{
    PCIDevice *d;
    int dom, bus;
    unsigned slot;

    if (pci_read_devaddr(mon, pci_addr, &dom, &bus, &slot)) {
        return -1;
    }

    d = pci_find_device(pci_find_root_bus(dom), bus, slot, 0);
    if (!d) {
        monitor_printf(mon, "slot %d empty\n", slot);
        return -1;
    }
    return qdev_unplug(&d->qdev);
}

void do_pci_device_hot_remove(Monitor *mon, const QDict *qdict)
{
    pci_device_hot_remove(mon, qdict_get_str(qdict, "pci_addr"));
}
Commit	Line	Data
6f338c34 AL	1	/*
	2	* QEMU PCI hotplug support
	3	*
	4	* Copyright (c) 2004 Fabrice Bellard
	5	*
	6	* Permission is hereby granted, free of charge, to any person obtaining a copy
	7	* of this software and associated documentation files (the "Software"), to deal
	8	* in the Software without restriction, including without limitation the rights
	9	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	10	* copies of the Software, and to permit persons to whom the Software is
	11	* furnished to do so, subject to the following conditions:
	12	*
	13	* The above copyright notice and this permission notice shall be included in
	14	* all copies or substantial portions of the Software.
	15	*
	16	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	17	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	18	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	19	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	20	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	21	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	22	* THE SOFTWARE.
	23	*/
	24
	25	#include "hw.h"
	26	#include "boards.h"
	27	#include "pci.h"
	28	#include "net.h"
6f338c34	29	#include "pc.h"
376253ec	30	#include "monitor.h"
43b443b6	31	#include "scsi.h"
6f338c34	32	#include "virtio-blk.h"
c59c7ea9	33	#include "qemu-config.h"
2446333c	34	#include "blockdev.h"
6f338c34	35
ce88f890	36	#if defined(TARGET_I386)
1f5f6638	37	static PCIDevice qemu_pci_hot_add_nic(Monitor mon,
c59c7ea9 MM	38	const char *devaddr,
c59c7ea9 MM	39	const char *opts_str)
6f338c34	40	{
c59c7ea9	41	QemuOpts *opts;
53e0d8af GH	42	PCIBus *bus;
	43	int ret, devfn;
	44
	45	bus = pci_get_bus_devfn(&devfn, devaddr);
	46	if (!bus) {
	47	monitor_printf(mon, "Invalid PCI device address %s\n", devaddr);
	48	return NULL;
	49	}
	50	if (!((BusState*)bus)->allow_hotplug) {
	51	monitor_printf(mon, "PCI bus doesn't support hotplug\n");
	52	return NULL;
	53	}
6f338c34	54
3329f07b	55	opts = qemu_opts_parse(qemu_find_opts("net"), opts_str ? opts_str : "", 0);
c59c7ea9	56	if (!opts) {
c59c7ea9 MM	57	return NULL;
	58	}
	59
	60	qemu_opt_set(opts, "type", "nic");
	61
f6b134ac	62	ret = net_client_init(mon, opts, 0);
eefb4091	63	if (ret < 0)
6f338c34	64	return NULL;
5607c388 MA	65	if (nd_table[ret].devaddr) {
	66	monitor_printf(mon, "Parameter addr not supported\n");
	67	return NULL;
	68	}
1f5f6638	69	return pci_nic_init(&nd_table[ret], "rtl8139", devaddr);
6f338c34 AL	70	}
6f338c34 AL	71
6fdb03d5 MA	72	static int scsi_hot_add(Monitor mon, DeviceState adapter,
6fdb03d5 MA	73	DriveInfo *dinfo, int printinfo)
30d335d6 GH	74	{
	75	SCSIBus *scsibus;
	76	SCSIDevice *scsidev;
	77
	78	scsibus = DO_UPCAST(SCSIBus, qbus, QLIST_FIRST(&adapter->child_bus));
	79	if (!scsibus \|\| strcmp(scsibus->qbus.info->name, "SCSI") != 0) {
1ecda02b	80	error_report("Device is not a SCSI adapter");
30d335d6 GH	81	return -1;
	82	}
	83
	84	/*
	85	* drive_init() tries to find a default for dinfo->unit. Doesn't
	86	* work at all for hotplug though as we assign the device to a
	87	* specific bus instead of the first bus with spare scsi ids.
	88	*
	89	* Ditch the calculated value and reload from option string (if
	90	* specified).
	91	*/
	92	dinfo->unit = qemu_opt_get_number(dinfo->opts, "unit", -1);
f8b6cc00	93	scsidev = scsi_bus_legacy_add_drive(scsibus, dinfo->bdrv, dinfo->unit);
fa66b909 MA	94	if (!scsidev) {
	95	return -1;
	96	}
11f4d7f4	97	dinfo->unit = scsidev->id;
30d335d6 GH	98
30d335d6 GH	99	if (printinfo)
6fdb03d5 MA	100	monitor_printf(mon, "OK bus %d, unit %d\n",
6fdb03d5 MA	101	scsibus->busnr, scsidev->id);
30d335d6 GH	102	return 0;
	103	}
	104
f18c16de	105	void drive_hot_add(Monitor mon, const QDict qdict)
6f338c34 AL	106	{
	107	int dom, pci_bus;
	108	unsigned slot;
7f5b7d3e	109	int type;
6f338c34	110	PCIDevice *dev;
4db49dc0	111	DriveInfo *dinfo = NULL;
f18c16de LC	112	const char *pci_addr = qdict_get_str(qdict, "pci_addr");
f18c16de LC	113	const char *opts = qdict_get_str(qdict, "opts");
6f338c34	114
751c6a17 GH	115	dinfo = add_init_drive(opts);
751c6a17 GH	116	if (!dinfo)
4db49dc0	117	goto err;
751c6a17	118	if (dinfo->devaddr) {
c2cc47a4	119	monitor_printf(mon, "Parameter addr not supported\n");
4db49dc0	120	goto err;
c2cc47a4	121	}
751c6a17	122	type = dinfo->type;
6f338c34 AL	123
	124	switch (type) {
	125	case IF_SCSI:
4db49dc0 GH	126	if (pci_read_devaddr(mon, pci_addr, &dom, &pci_bus, &slot)) {
	127	goto err;
	128	}
e075e788	129	dev = pci_find_device(pci_find_root_bus(dom), pci_bus, slot, 0);
4db49dc0 GH	130	if (!dev) {
	131	monitor_printf(mon, "no pci device with address %s\n", pci_addr);
	132	goto err;
	133	}
6fdb03d5	134	if (scsi_hot_add(mon, &dev->qdev, dinfo, 1) != 0) {
30d335d6 GH	135	goto err;
30d335d6 GH	136	}
6f338c34	137	break;
7101174e GH	138	case IF_NONE:
	139	monitor_printf(mon, "OK\n");
	140	break;
6f338c34	141	default:
376253ec	142	monitor_printf(mon, "Can't hot-add drive to type %d\n", type);
4db49dc0	143	goto err;
6f338c34	144	}
4db49dc0	145	return;
6f338c34	146
4db49dc0 GH	147	err:
	148	if (dinfo)
	149	drive_uninit(dinfo);
6f338c34 AL	150	return;
	151	}
	152
1f5f6638 MA	153	static PCIDevice qemu_pci_hot_add_storage(Monitor mon,
1f5f6638 MA	154	const char *devaddr,
376253ec	155	const char *opts)
6f338c34	156	{
1f5f6638	157	PCIDevice *dev;
06c79f4e	158	DriveInfo *dinfo = NULL;
751c6a17	159	int type = -1;
6f338c34	160	char buf[128];
49bd1458 MA	161	PCIBus *bus;
49bd1458 MA	162	int devfn;
6f338c34 AL	163
	164	if (get_param_value(buf, sizeof(buf), "if", opts)) {
	165	if (!strcmp(buf, "scsi"))
	166	type = IF_SCSI;
	167	else if (!strcmp(buf, "virtio")) {
	168	type = IF_VIRTIO;
8707ecca AL	169	} else {
8707ecca AL	170	monitor_printf(mon, "type %s not a hotpluggable PCI device.\n", buf);
1f5f6638	171	return NULL;
6f338c34 AL	172	}
6f338c34 AL	173	} else {
376253ec	174	monitor_printf(mon, "no if= specified\n");
1f5f6638	175	return NULL;
6f338c34 AL	176	}
	177
	178	if (get_param_value(buf, sizeof(buf), "file", opts)) {
751c6a17 GH	179	dinfo = add_init_drive(opts);
751c6a17 GH	180	if (!dinfo)
1f5f6638	181	return NULL;
751c6a17	182	if (dinfo->devaddr) {
c2cc47a4 MA	183	monitor_printf(mon, "Parameter addr not supported\n");
	184	return NULL;
	185	}
7432ff5d BS	186	} else {
7432ff5d BS	187	dinfo = NULL;
6f338c34 AL	188	}
6f338c34 AL	189
49bd1458 MA	190	bus = pci_get_bus_devfn(&devfn, devaddr);
	191	if (!bus) {
	192	monitor_printf(mon, "Invalid PCI device address %s\n", devaddr);
	193	return NULL;
	194	}
53e0d8af GH	195	if (!((BusState*)bus)->allow_hotplug) {
	196	monitor_printf(mon, "PCI bus doesn't support hotplug\n");
	197	return NULL;
	198	}
49bd1458	199
6f338c34 AL	200	switch (type) {
6f338c34 AL	201	case IF_SCSI:
499cf102	202	dev = pci_create(bus, devfn, "lsi53c895a");
5b684b5a GH	203	if (qdev_init(&dev->qdev) < 0)
5b684b5a GH	204	dev = NULL;
ec7efac4	205	if (dev && dinfo) {
6fdb03d5	206	if (scsi_hot_add(mon, &dev->qdev, dinfo, 0) != 0) {
30d335d6 GH	207	qdev_unplug(&dev->qdev);
	208	dev = NULL;
	209	}
5b684b5a	210	}
6f338c34 AL	211	break;
6f338c34 AL	212	case IF_VIRTIO:
7432ff5d BS	213	if (!dinfo) {
	214	monitor_printf(mon, "virtio requires a backing file/device.\n");
	215	return NULL;
	216	}
499cf102	217	dev = pci_create(bus, devfn, "virtio-blk-pci");
18846dee MA	218	if (qdev_prop_set_drive(&dev->qdev, "drive", dinfo->bdrv) < 0) {
	219	qdev_free(&dev->qdev);
	220	dev = NULL;
	221	break;
	222	}
5b684b5a GH	223	if (qdev_init(&dev->qdev) < 0)
5b684b5a GH	224	dev = NULL;
6f338c34	225	break;
1f5f6638 MA	226	default:
1f5f6638 MA	227	dev = NULL;
6f338c34	228	}
1f5f6638	229	return dev;
6f338c34 AL	230	}
6f338c34 AL	231
6c6a58ae	232	void pci_device_hot_add(Monitor mon, const QDict qdict)
6f338c34 AL	233	{
6f338c34 AL	234	PCIDevice *dev = NULL;
1d4daa91 LC	235	const char *pci_addr = qdict_get_str(qdict, "pci_addr");
	236	const char *type = qdict_get_str(qdict, "type");
	237	const char *opts = qdict_get_try_str(qdict, "opts");
6f338c34	238
e9283f8b JK	239	/* strip legacy tag */
	240	if (!strncmp(pci_addr, "pci_addr=", 9)) {
	241	pci_addr += 9;
6f338c34 AL	242	}
6f338c34 AL	243
a62acdc0 JK	244	if (!opts) {
	245	opts = "";
	246	}
	247
e9283f8b JK	248	if (!strcmp(pci_addr, "auto"))
e9283f8b JK	249	pci_addr = NULL;
6f338c34	250
395560c8	251	if (strcmp(type, "nic") == 0) {
e9283f8b	252	dev = qemu_pci_hot_add_nic(mon, pci_addr, opts);
395560c8	253	} else if (strcmp(type, "storage") == 0) {
e9283f8b	254	dev = qemu_pci_hot_add_storage(mon, pci_addr, opts);
395560c8	255	} else {
376253ec	256	monitor_printf(mon, "invalid type: %s\n", type);
395560c8	257	}
6f338c34 AL	258
6f338c34 AL	259	if (dev) {
6c6a58ae	260	monitor_printf(mon, "OK domain %d, bus %d, slot %d, function %d\n",
e075e788 IY	261	pci_find_domain(dev->bus),
e075e788 IY	262	pci_bus_num(dev->bus), PCI_SLOT(dev->devfn),
6c6a58ae MA	263	PCI_FUNC(dev->devfn));
6c6a58ae MA	264	} else
376253ec	265	monitor_printf(mon, "failed to add %s\n", opts);
6f338c34 AL	266	}
	267	#endif
	268
f2b07c92	269	static int pci_device_hot_remove(Monitor mon, const char pci_addr)
6f338c34 AL	270	{
	271	PCIDevice *d;
	272	int dom, bus;
	273	unsigned slot;
	274
e9283f8b	275	if (pci_read_devaddr(mon, pci_addr, &dom, &bus, &slot)) {
053801bc	276	return -1;
6f338c34 AL	277	}
6f338c34 AL	278
e075e788	279	d = pci_find_device(pci_find_root_bus(dom), bus, slot, 0);
6f338c34	280	if (!d) {
376253ec	281	monitor_printf(mon, "slot %d empty\n", slot);
053801bc	282	return -1;
6f338c34	283	}
053801bc	284	return qdev_unplug(&d->qdev);
6f338c34 AL	285	}
6f338c34 AL	286
b752daf0	287	void do_pci_device_hot_remove(Monitor mon, const QDict qdict)
38183186	288	{
b752daf0	289	pci_device_hot_remove(mon, qdict_get_str(qdict, "pci_addr"));
38183186	290	}