[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);
    dinfo->bus = scsibus->busnr;
    scsidev = scsi_bus_legacy_add_drive(scsibus, dinfo->bdrv, dinfo->unit, false);
    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_put_ref(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);
31e1ea3e	93	dinfo->bus = scsibus->busnr;
2d1fd261	94	scsidev = scsi_bus_legacy_add_drive(scsibus, dinfo->bdrv, dinfo->unit, false);
fa66b909 MA	95	if (!scsidev) {
	96	return -1;
	97	}
11f4d7f4	98	dinfo->unit = scsidev->id;
30d335d6 GH	99
30d335d6 GH	100	if (printinfo)
6fdb03d5 MA	101	monitor_printf(mon, "OK bus %d, unit %d\n",
6fdb03d5 MA	102	scsibus->busnr, scsidev->id);
30d335d6 GH	103	return 0;
	104	}
	105
f18c16de	106	void drive_hot_add(Monitor mon, const QDict qdict)
6f338c34 AL	107	{
	108	int dom, pci_bus;
	109	unsigned slot;
7f5b7d3e	110	int type;
6f338c34	111	PCIDevice *dev;
4db49dc0	112	DriveInfo *dinfo = NULL;
f18c16de LC	113	const char *pci_addr = qdict_get_str(qdict, "pci_addr");
f18c16de LC	114	const char *opts = qdict_get_str(qdict, "opts");
6f338c34	115
751c6a17 GH	116	dinfo = add_init_drive(opts);
751c6a17 GH	117	if (!dinfo)
4db49dc0	118	goto err;
751c6a17	119	if (dinfo->devaddr) {
c2cc47a4	120	monitor_printf(mon, "Parameter addr not supported\n");
4db49dc0	121	goto err;
c2cc47a4	122	}
751c6a17	123	type = dinfo->type;
6f338c34 AL	124
	125	switch (type) {
	126	case IF_SCSI:
4db49dc0 GH	127	if (pci_read_devaddr(mon, pci_addr, &dom, &pci_bus, &slot)) {
	128	goto err;
	129	}
e075e788	130	dev = pci_find_device(pci_find_root_bus(dom), pci_bus, slot, 0);
4db49dc0 GH	131	if (!dev) {
	132	monitor_printf(mon, "no pci device with address %s\n", pci_addr);
	133	goto err;
	134	}
6fdb03d5	135	if (scsi_hot_add(mon, &dev->qdev, dinfo, 1) != 0) {
30d335d6 GH	136	goto err;
30d335d6 GH	137	}
6f338c34	138	break;
7101174e GH	139	case IF_NONE:
	140	monitor_printf(mon, "OK\n");
	141	break;
6f338c34	142	default:
376253ec	143	monitor_printf(mon, "Can't hot-add drive to type %d\n", type);
4db49dc0	144	goto err;
6f338c34	145	}
4db49dc0	146	return;
6f338c34	147
4db49dc0 GH	148	err:
4db49dc0 GH	149	if (dinfo)
84fb3925	150	drive_put_ref(dinfo);
6f338c34 AL	151	return;
	152	}
	153
1f5f6638 MA	154	static PCIDevice qemu_pci_hot_add_storage(Monitor mon,
1f5f6638 MA	155	const char *devaddr,
376253ec	156	const char *opts)
6f338c34	157	{
1f5f6638	158	PCIDevice *dev;
06c79f4e	159	DriveInfo *dinfo = NULL;
751c6a17	160	int type = -1;
6f338c34	161	char buf[128];
49bd1458 MA	162	PCIBus *bus;
49bd1458 MA	163	int devfn;
6f338c34 AL	164
	165	if (get_param_value(buf, sizeof(buf), "if", opts)) {
	166	if (!strcmp(buf, "scsi"))
	167	type = IF_SCSI;
	168	else if (!strcmp(buf, "virtio")) {
	169	type = IF_VIRTIO;
8707ecca AL	170	} else {
8707ecca AL	171	monitor_printf(mon, "type %s not a hotpluggable PCI device.\n", buf);
1f5f6638	172	return NULL;
6f338c34 AL	173	}
6f338c34 AL	174	} else {
376253ec	175	monitor_printf(mon, "no if= specified\n");
1f5f6638	176	return NULL;
6f338c34 AL	177	}
	178
	179	if (get_param_value(buf, sizeof(buf), "file", opts)) {
751c6a17 GH	180	dinfo = add_init_drive(opts);
751c6a17 GH	181	if (!dinfo)
1f5f6638	182	return NULL;
751c6a17	183	if (dinfo->devaddr) {
c2cc47a4 MA	184	monitor_printf(mon, "Parameter addr not supported\n");
	185	return NULL;
	186	}
7432ff5d BS	187	} else {
7432ff5d BS	188	dinfo = NULL;
6f338c34 AL	189	}
6f338c34 AL	190
49bd1458 MA	191	bus = pci_get_bus_devfn(&devfn, devaddr);
	192	if (!bus) {
	193	monitor_printf(mon, "Invalid PCI device address %s\n", devaddr);
	194	return NULL;
	195	}
53e0d8af GH	196	if (!((BusState*)bus)->allow_hotplug) {
	197	monitor_printf(mon, "PCI bus doesn't support hotplug\n");
	198	return NULL;
	199	}
49bd1458	200
6f338c34 AL	201	switch (type) {
6f338c34 AL	202	case IF_SCSI:
499cf102	203	dev = pci_create(bus, devfn, "lsi53c895a");
5b684b5a GH	204	if (qdev_init(&dev->qdev) < 0)
5b684b5a GH	205	dev = NULL;
ec7efac4	206	if (dev && dinfo) {
6fdb03d5	207	if (scsi_hot_add(mon, &dev->qdev, dinfo, 0) != 0) {
30d335d6 GH	208	qdev_unplug(&dev->qdev);
	209	dev = NULL;
	210	}
5b684b5a	211	}
6f338c34 AL	212	break;
6f338c34 AL	213	case IF_VIRTIO:
7432ff5d BS	214	if (!dinfo) {
	215	monitor_printf(mon, "virtio requires a backing file/device.\n");
	216	return NULL;
	217	}
499cf102	218	dev = pci_create(bus, devfn, "virtio-blk-pci");
18846dee MA	219	if (qdev_prop_set_drive(&dev->qdev, "drive", dinfo->bdrv) < 0) {
	220	qdev_free(&dev->qdev);
	221	dev = NULL;
	222	break;
	223	}
5b684b5a GH	224	if (qdev_init(&dev->qdev) < 0)
5b684b5a GH	225	dev = NULL;
6f338c34	226	break;
1f5f6638 MA	227	default:
1f5f6638 MA	228	dev = NULL;
6f338c34	229	}
1f5f6638	230	return dev;
6f338c34 AL	231	}
6f338c34 AL	232
6c6a58ae	233	void pci_device_hot_add(Monitor mon, const QDict qdict)
6f338c34 AL	234	{
6f338c34 AL	235	PCIDevice *dev = NULL;
1d4daa91 LC	236	const char *pci_addr = qdict_get_str(qdict, "pci_addr");
	237	const char *type = qdict_get_str(qdict, "type");
	238	const char *opts = qdict_get_try_str(qdict, "opts");
6f338c34	239
e9283f8b JK	240	/* strip legacy tag */
	241	if (!strncmp(pci_addr, "pci_addr=", 9)) {
	242	pci_addr += 9;
6f338c34 AL	243	}
6f338c34 AL	244
a62acdc0 JK	245	if (!opts) {
	246	opts = "";
	247	}
	248
e9283f8b JK	249	if (!strcmp(pci_addr, "auto"))
e9283f8b JK	250	pci_addr = NULL;
6f338c34	251
395560c8	252	if (strcmp(type, "nic") == 0) {
e9283f8b	253	dev = qemu_pci_hot_add_nic(mon, pci_addr, opts);
395560c8	254	} else if (strcmp(type, "storage") == 0) {
e9283f8b	255	dev = qemu_pci_hot_add_storage(mon, pci_addr, opts);
395560c8	256	} else {
376253ec	257	monitor_printf(mon, "invalid type: %s\n", type);
395560c8	258	}
6f338c34 AL	259
6f338c34 AL	260	if (dev) {
6c6a58ae	261	monitor_printf(mon, "OK domain %d, bus %d, slot %d, function %d\n",
e075e788 IY	262	pci_find_domain(dev->bus),
e075e788 IY	263	pci_bus_num(dev->bus), PCI_SLOT(dev->devfn),
6c6a58ae MA	264	PCI_FUNC(dev->devfn));
6c6a58ae MA	265	} else
376253ec	266	monitor_printf(mon, "failed to add %s\n", opts);
6f338c34 AL	267	}
	268	#endif
	269
f2b07c92	270	static int pci_device_hot_remove(Monitor mon, const char pci_addr)
6f338c34 AL	271	{
	272	PCIDevice *d;
	273	int dom, bus;
	274	unsigned slot;
	275
e9283f8b	276	if (pci_read_devaddr(mon, pci_addr, &dom, &bus, &slot)) {
053801bc	277	return -1;
6f338c34 AL	278	}
6f338c34 AL	279
e075e788	280	d = pci_find_device(pci_find_root_bus(dom), bus, slot, 0);
6f338c34	281	if (!d) {
376253ec	282	monitor_printf(mon, "slot %d empty\n", slot);
053801bc	283	return -1;
6f338c34	284	}
053801bc	285	return qdev_unplug(&d->qdev);
6f338c34 AL	286	}
6f338c34 AL	287
b752daf0	288	void do_pci_device_hot_remove(Monitor mon, const QDict qdict)
38183186	289	{
b752daf0	290	pci_device_hot_remove(mon, qdict_get_str(qdict, "pci_addr"));
38183186	291	}