[thirdparty/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"
#include "error.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, -1);
    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;
}

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

    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,
                              PCI_DEVFN(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;
    default:
        monitor_printf(mon, "Can't hot-add drive to type %d\n", type);
        goto err;
    }

    return 0;
err:
    return -1;
}

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, NULL);
                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;
    Error *local_err = NULL;

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

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

    qdev_unplug(&d->qdev, &local_err);
    if (error_is_set(&local_err)) {
        monitor_printf(mon, "%s\n", error_get_pretty(local_err));
        error_free(local_err);
        return -1;
    }

    return 0;
}

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"
56f9107e	35	#include "error.h"
6f338c34	36
ce88f890	37	#if defined(TARGET_I386)
1f5f6638	38	static PCIDevice qemu_pci_hot_add_nic(Monitor mon,
c59c7ea9 MM	39	const char *devaddr,
c59c7ea9 MM	40	const char *opts_str)
6f338c34	41	{
c59c7ea9	42	QemuOpts *opts;
53e0d8af GH	43	PCIBus *bus;
	44	int ret, devfn;
	45
	46	bus = pci_get_bus_devfn(&devfn, devaddr);
	47	if (!bus) {
	48	monitor_printf(mon, "Invalid PCI device address %s\n", devaddr);
	49	return NULL;
	50	}
	51	if (!((BusState*)bus)->allow_hotplug) {
	52	monitor_printf(mon, "PCI bus doesn't support hotplug\n");
	53	return NULL;
	54	}
6f338c34	55
3329f07b	56	opts = qemu_opts_parse(qemu_find_opts("net"), opts_str ? opts_str : "", 0);
c59c7ea9	57	if (!opts) {
c59c7ea9 MM	58	return NULL;
	59	}
	60
	61	qemu_opt_set(opts, "type", "nic");
	62
f6b134ac	63	ret = net_client_init(mon, opts, 0);
eefb4091	64	if (ret < 0)
6f338c34	65	return NULL;
5607c388 MA	66	if (nd_table[ret].devaddr) {
	67	monitor_printf(mon, "Parameter addr not supported\n");
	68	return NULL;
	69	}
1f5f6638	70	return pci_nic_init(&nd_table[ret], "rtl8139", devaddr);
6f338c34 AL	71	}
6f338c34 AL	72
6fdb03d5 MA	73	static int scsi_hot_add(Monitor mon, DeviceState adapter,
6fdb03d5 MA	74	DriveInfo *dinfo, int printinfo)
30d335d6 GH	75	{
	76	SCSIBus *scsibus;
	77	SCSIDevice *scsidev;
	78
	79	scsibus = DO_UPCAST(SCSIBus, qbus, QLIST_FIRST(&adapter->child_bus));
	80	if (!scsibus \|\| strcmp(scsibus->qbus.info->name, "SCSI") != 0) {
1ecda02b	81	error_report("Device is not a SCSI adapter");
30d335d6 GH	82	return -1;
	83	}
	84
	85	/*
	86	* drive_init() tries to find a default for dinfo->unit. Doesn't
	87	* work at all for hotplug though as we assign the device to a
	88	* specific bus instead of the first bus with spare scsi ids.
	89	*
	90	* Ditch the calculated value and reload from option string (if
	91	* specified).
	92	*/
	93	dinfo->unit = qemu_opt_get_number(dinfo->opts, "unit", -1);
31e1ea3e	94	dinfo->bus = scsibus->busnr;
ce4e7e46 PB	95	scsidev = scsi_bus_legacy_add_drive(scsibus, dinfo->bdrv, dinfo->unit,
ce4e7e46 PB	96	false, -1);
fa66b909 MA	97	if (!scsidev) {
	98	return -1;
	99	}
11f4d7f4	100	dinfo->unit = scsidev->id;
30d335d6 GH	101
30d335d6 GH	102	if (printinfo)
6fdb03d5 MA	103	monitor_printf(mon, "OK bus %d, unit %d\n",
6fdb03d5 MA	104	scsibus->busnr, scsidev->id);
30d335d6 GH	105	return 0;
	106	}
	107
dd97aa8a AG	108	int pci_drive_hot_add(Monitor mon, const QDict qdict,
dd97aa8a AG	109	DriveInfo *dinfo, int type)
6f338c34 AL	110	{
	111	int dom, pci_bus;
	112	unsigned slot;
6f338c34	113	PCIDevice *dev;
f18c16de	114	const char *pci_addr = qdict_get_str(qdict, "pci_addr");
6f338c34 AL	115
	116	switch (type) {
	117	case IF_SCSI:
4db49dc0 GH	118	if (pci_read_devaddr(mon, pci_addr, &dom, &pci_bus, &slot)) {
	119	goto err;
	120	}
5256d8bf IY	121	dev = pci_find_device(pci_find_root_bus(dom), pci_bus,
5256d8bf IY	122	PCI_DEVFN(slot, 0));
4db49dc0 GH	123	if (!dev) {
	124	monitor_printf(mon, "no pci device with address %s\n", pci_addr);
	125	goto err;
	126	}
6fdb03d5	127	if (scsi_hot_add(mon, &dev->qdev, dinfo, 1) != 0) {
30d335d6 GH	128	goto err;
30d335d6 GH	129	}
6f338c34 AL	130	break;
6f338c34 AL	131	default:
376253ec	132	monitor_printf(mon, "Can't hot-add drive to type %d\n", type);
4db49dc0	133	goto err;
6f338c34 AL	134	}
6f338c34 AL	135
dd97aa8a	136	return 0;
4db49dc0	137	err:
dd97aa8a	138	return -1;
6f338c34 AL	139	}
6f338c34 AL	140
1f5f6638 MA	141	static PCIDevice qemu_pci_hot_add_storage(Monitor mon,
1f5f6638 MA	142	const char *devaddr,
376253ec	143	const char *opts)
6f338c34	144	{
1f5f6638	145	PCIDevice *dev;
06c79f4e	146	DriveInfo *dinfo = NULL;
751c6a17	147	int type = -1;
6f338c34	148	char buf[128];
49bd1458 MA	149	PCIBus *bus;
49bd1458 MA	150	int devfn;
6f338c34 AL	151
	152	if (get_param_value(buf, sizeof(buf), "if", opts)) {
	153	if (!strcmp(buf, "scsi"))
	154	type = IF_SCSI;
	155	else if (!strcmp(buf, "virtio")) {
	156	type = IF_VIRTIO;
8707ecca AL	157	} else {
8707ecca AL	158	monitor_printf(mon, "type %s not a hotpluggable PCI device.\n", buf);
1f5f6638	159	return NULL;
6f338c34 AL	160	}
6f338c34 AL	161	} else {
376253ec	162	monitor_printf(mon, "no if= specified\n");
1f5f6638	163	return NULL;
6f338c34 AL	164	}
	165
	166	if (get_param_value(buf, sizeof(buf), "file", opts)) {
751c6a17 GH	167	dinfo = add_init_drive(opts);
751c6a17 GH	168	if (!dinfo)
1f5f6638	169	return NULL;
751c6a17	170	if (dinfo->devaddr) {
c2cc47a4 MA	171	monitor_printf(mon, "Parameter addr not supported\n");
	172	return NULL;
	173	}
7432ff5d BS	174	} else {
7432ff5d BS	175	dinfo = NULL;
6f338c34 AL	176	}
6f338c34 AL	177
49bd1458 MA	178	bus = pci_get_bus_devfn(&devfn, devaddr);
	179	if (!bus) {
	180	monitor_printf(mon, "Invalid PCI device address %s\n", devaddr);
	181	return NULL;
	182	}
53e0d8af GH	183	if (!((BusState*)bus)->allow_hotplug) {
	184	monitor_printf(mon, "PCI bus doesn't support hotplug\n");
	185	return NULL;
	186	}
49bd1458	187
6f338c34 AL	188	switch (type) {
6f338c34 AL	189	case IF_SCSI:
499cf102	190	dev = pci_create(bus, devfn, "lsi53c895a");
5b684b5a GH	191	if (qdev_init(&dev->qdev) < 0)
5b684b5a GH	192	dev = NULL;
ec7efac4	193	if (dev && dinfo) {
6fdb03d5	194	if (scsi_hot_add(mon, &dev->qdev, dinfo, 0) != 0) {
56f9107e	195	qdev_unplug(&dev->qdev, NULL);
30d335d6 GH	196	dev = NULL;
30d335d6 GH	197	}
5b684b5a	198	}
6f338c34 AL	199	break;
6f338c34 AL	200	case IF_VIRTIO:
7432ff5d BS	201	if (!dinfo) {
	202	monitor_printf(mon, "virtio requires a backing file/device.\n");
	203	return NULL;
	204	}
499cf102	205	dev = pci_create(bus, devfn, "virtio-blk-pci");
18846dee MA	206	if (qdev_prop_set_drive(&dev->qdev, "drive", dinfo->bdrv) < 0) {
	207	qdev_free(&dev->qdev);
	208	dev = NULL;
	209	break;
	210	}
5b684b5a GH	211	if (qdev_init(&dev->qdev) < 0)
5b684b5a GH	212	dev = NULL;
6f338c34	213	break;
1f5f6638 MA	214	default:
1f5f6638 MA	215	dev = NULL;
6f338c34	216	}
1f5f6638	217	return dev;
6f338c34 AL	218	}
6f338c34 AL	219
6c6a58ae	220	void pci_device_hot_add(Monitor mon, const QDict qdict)
6f338c34 AL	221	{
6f338c34 AL	222	PCIDevice *dev = NULL;
1d4daa91 LC	223	const char *pci_addr = qdict_get_str(qdict, "pci_addr");
	224	const char *type = qdict_get_str(qdict, "type");
	225	const char *opts = qdict_get_try_str(qdict, "opts");
6f338c34	226
e9283f8b JK	227	/* strip legacy tag */
	228	if (!strncmp(pci_addr, "pci_addr=", 9)) {
	229	pci_addr += 9;
6f338c34 AL	230	}
6f338c34 AL	231
a62acdc0 JK	232	if (!opts) {
	233	opts = "";
	234	}
	235
e9283f8b JK	236	if (!strcmp(pci_addr, "auto"))
e9283f8b JK	237	pci_addr = NULL;
6f338c34	238
395560c8	239	if (strcmp(type, "nic") == 0) {
e9283f8b	240	dev = qemu_pci_hot_add_nic(mon, pci_addr, opts);
395560c8	241	} else if (strcmp(type, "storage") == 0) {
e9283f8b	242	dev = qemu_pci_hot_add_storage(mon, pci_addr, opts);
395560c8	243	} else {
376253ec	244	monitor_printf(mon, "invalid type: %s\n", type);
395560c8	245	}
6f338c34 AL	246
6f338c34 AL	247	if (dev) {
6c6a58ae	248	monitor_printf(mon, "OK domain %d, bus %d, slot %d, function %d\n",
e075e788 IY	249	pci_find_domain(dev->bus),
e075e788 IY	250	pci_bus_num(dev->bus), PCI_SLOT(dev->devfn),
6c6a58ae MA	251	PCI_FUNC(dev->devfn));
6c6a58ae MA	252	} else
376253ec	253	monitor_printf(mon, "failed to add %s\n", opts);
6f338c34 AL	254	}
	255	#endif
	256
f2b07c92	257	static int pci_device_hot_remove(Monitor mon, const char pci_addr)
6f338c34 AL	258	{
	259	PCIDevice *d;
	260	int dom, bus;
	261	unsigned slot;
56f9107e	262	Error *local_err = NULL;
6f338c34	263
e9283f8b	264	if (pci_read_devaddr(mon, pci_addr, &dom, &bus, &slot)) {
053801bc	265	return -1;
6f338c34 AL	266	}
6f338c34 AL	267
5256d8bf	268	d = pci_find_device(pci_find_root_bus(dom), bus, PCI_DEVFN(slot, 0));
6f338c34	269	if (!d) {
376253ec	270	monitor_printf(mon, "slot %d empty\n", slot);
053801bc	271	return -1;
6f338c34	272	}
56f9107e LC	273
	274	qdev_unplug(&d->qdev, &local_err);
	275	if (error_is_set(&local_err)) {
	276	monitor_printf(mon, "%s\n", error_get_pretty(local_err));
	277	error_free(local_err);
	278	return -1;
	279	}
	280
	281	return 0;
6f338c34 AL	282	}
6f338c34 AL	283
b752daf0	284	void do_pci_device_hot_remove(Monitor mon, const QDict qdict)
38183186	285	{
b752daf0	286	pci_device_hot_remove(mon, qdict_get_str(qdict, "pci_addr"));
38183186	287	}