Differential D26035 Diff 81512 usr.sbin/bhyve/pci_virtio_net.c

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usr.sbin/bhyve/pci_virtio_net.c

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	#include <string.h>			#include <string.h>
	#include <strings.h>			#include <strings.h>
	#include <unistd.h>			#include <unistd.h>
	#include <assert.h>			#include <assert.h>
	#include <pthread.h>			#include <pthread.h>
	#include <pthread_np.h>			#include <pthread_np.h>

	#include "bhyverun.h"			#include "bhyverun.h"
				#include "config.h"
	#include "debug.h"			#include "debug.h"
	#include "pci_emul.h"			#include "pci_emul.h"
	#include "mevent.h"			#include "mevent.h"
	#include "virtio.h"			#include "virtio.h"
	#include "net_utils.h"			#include "net_utils.h"
	#include "net_backends.h"			#include "net_backends.h"
	#include "iov.h"			#include "iov.h"

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	pci_vtnet_ping_ctlq(void vsc, struct vqueue_info vq)			pci_vtnet_ping_ctlq(void vsc, struct vqueue_info vq)
	{			{

	DPRINTF(("vtnet: control qnotify!"));			DPRINTF(("vtnet: control qnotify!"));
	}			}
	#endif			#endif

	static int			static int
	pci_vtnet_init(struct vmctx ctx, struct pci_devinst pi, char *opts)			pci_vtnet_init(struct vmctx ctx, struct pci_devinst pi, nvlist_t *nvl)
	{			{
	struct pci_vtnet_softc *sc;			struct pci_vtnet_softc *sc;
				const char *value;
	char tname[MAXCOMLEN + 1];			char tname[MAXCOMLEN + 1];
	int mac_provided;
	int mtu_provided;
	unsigned long mtu = ETHERMTU;			unsigned long mtu = ETHERMTU;
				int err;

	/*			/*
	* Allocate data structures for further virtio initializations.			* Allocate data structures for further virtio initializations.
	* sc also contains a copy of vtnet_vi_consts, since capabilities			* sc also contains a copy of vtnet_vi_consts, since capabilities
	* change depending on the backend.			* change depending on the backend.
	*/			*/
	sc = calloc(1, sizeof(struct pci_vtnet_softc));			sc = calloc(1, sizeof(struct pci_vtnet_softc));

	sc->vsc_consts = vtnet_vi_consts;			sc->vsc_consts = vtnet_vi_consts;
	pthread_mutex_init(&sc->vsc_mtx, NULL);			pthread_mutex_init(&sc->vsc_mtx, NULL);

	sc->vsc_queues[VTNET_RXQ].vq_qsize = VTNET_RINGSZ;			sc->vsc_queues[VTNET_RXQ].vq_qsize = VTNET_RINGSZ;
	sc->vsc_queues[VTNET_RXQ].vq_notify = pci_vtnet_ping_rxq;			sc->vsc_queues[VTNET_RXQ].vq_notify = pci_vtnet_ping_rxq;
	sc->vsc_queues[VTNET_TXQ].vq_qsize = VTNET_RINGSZ;			sc->vsc_queues[VTNET_TXQ].vq_qsize = VTNET_RINGSZ;
	sc->vsc_queues[VTNET_TXQ].vq_notify = pci_vtnet_ping_txq;			sc->vsc_queues[VTNET_TXQ].vq_notify = pci_vtnet_ping_txq;
	#ifdef notyet			#ifdef notyet
	sc->vsc_queues[VTNET_CTLQ].vq_qsize = VTNET_RINGSZ;			sc->vsc_queues[VTNET_CTLQ].vq_qsize = VTNET_RINGSZ;
	sc->vsc_queues[VTNET_CTLQ].vq_notify = pci_vtnet_ping_ctlq;			sc->vsc_queues[VTNET_CTLQ].vq_notify = pci_vtnet_ping_ctlq;
	#endif			#endif

	/*			value = get_config_value_node(nvl, "mac");
	* Attempt to open the backend device and read the MAC address			if (value != NULL) {
	* if specified.
	*/
	mac_provided = 0;
	mtu_provided = 0;
	if (opts != NULL) {
	char *optscopy;
	char *vtopts;
	int err = 0;

	/* Get the device name. */
	optscopy = vtopts = strdup(opts);
	(void) strsep(&vtopts, ",");

	/*
	* Parse the list of options in the form
	* key1=value1,...,keyN=valueN.
	*/
	while (vtopts != NULL) {
	char *value = vtopts;
	char *key;

	key = strsep(&value, "=");
	if (value == NULL)
	break;
	vtopts = value;
	(void) strsep(&vtopts, ",");

	if (strcmp(key, "mac") == 0) {
	err = net_parsemac(value, sc->vsc_config.mac);			err = net_parsemac(value, sc->vsc_config.mac);
	if (err)			if (err) {
	break;			free(sc);
	mac_provided = 1;			return (err);
	} else if (strcmp(key, "mtu") == 0) {			}
				} else
				net_genmac(pi, sc->vsc_config.mac);

				value = get_config_value_node(nvl, "mtu");
				if (value != NULL) {
	err = net_parsemtu(value, &mtu);			err = net_parsemtu(value, &mtu);
	if (err)			if (err) {
	break;			free(sc);
				return (err);
				}

	if (mtu < VTNET_MIN_MTU \|\| mtu > VTNET_MAX_MTU) {			if (mtu < VTNET_MIN_MTU \|\| mtu > VTNET_MAX_MTU) {
	err = EINVAL;			err = EINVAL;
	errno = EINVAL;			errno = EINVAL;
	break;
	}
	mtu_provided = 1;
	}
	}

	free(optscopy);

	if (err) {
	free(sc);			free(sc);
	return (err);			return (err);
	}			}
				sc->vsc_consts.vc_hv_caps \|= VIRTIO_NET_F_MTU;
				}
				sc->vsc_config.mtu = mtu;

	err = netbe_init(&sc->vsc_be, opts, pci_vtnet_rx_callback,			/* Permit interfaces without a configured backend. */
	sc);			if (get_config_value_node(nvl, "backend") != NULL) {
				err = netbe_init(&sc->vsc_be, nvl, pci_vtnet_rx_callback, sc);
	if (err) {			if (err) {
	free(sc);			free(sc);
	return (err);			return (err);
	}			}
				}

	sc->vsc_consts.vc_hv_caps \|= VIRTIO_NET_F_MRG_RXBUF \|			sc->vsc_consts.vc_hv_caps \|= VIRTIO_NET_F_MRG_RXBUF \|
	netbe_get_cap(sc->vsc_be);			netbe_get_cap(sc->vsc_be);
	}

	if (!mac_provided) {
	net_genmac(pi, sc->vsc_config.mac);
	}

	sc->vsc_config.mtu = mtu;
	if (mtu_provided) {
	sc->vsc_consts.vc_hv_caps \|= VIRTIO_NET_F_MTU;
	}

	/*			/*
	* Since we do not actually support multiqueue,			* Since we do not actually support multiqueue,
	* set the maximum virtqueue pairs to 1.			* set the maximum virtqueue pairs to 1.
	*/			*/
	sc->vsc_config.max_virtqueue_pairs = 1;			sc->vsc_config.max_virtqueue_pairs = 1;

	/* initialize config space */			/* initialize config space */
	pci_set_cfgdata16(pi, PCIR_DEVICE, VIRTIO_DEV_NET);			pci_set_cfgdata16(pi, PCIR_DEVICE, VIRTIO_DEV_NET);
	pci_set_cfgdata16(pi, PCIR_VENDOR, VIRTIO_VENDOR);			pci_set_cfgdata16(pi, PCIR_VENDOR, VIRTIO_VENDOR);
	pci_set_cfgdata8(pi, PCIR_CLASS, PCIC_NETWORK);			pci_set_cfgdata8(pi, PCIR_CLASS, PCIC_NETWORK);
	pci_set_cfgdata16(pi, PCIR_SUBDEV_0, VIRTIO_TYPE_NET);			pci_set_cfgdata16(pi, PCIR_SUBDEV_0, VIRTIO_TYPE_NET);
	pci_set_cfgdata16(pi, PCIR_SUBVEND_0, VIRTIO_VENDOR);			pci_set_cfgdata16(pi, PCIR_SUBVEND_0, VIRTIO_VENDOR);

	/* Link is up if we managed to open backend device. */			/* Link is always up. */
	sc->vsc_config.status = (opts == NULL \|\| sc->vsc_be);			sc->vsc_config.status = 1;

	vi_softc_linkup(&sc->vsc_vs, &sc->vsc_consts, sc, pi, sc->vsc_queues);			vi_softc_linkup(&sc->vsc_vs, &sc->vsc_consts, sc, pi, sc->vsc_queues);
	sc->vsc_vs.vs_mtx = &sc->vsc_mtx;			sc->vsc_vs.vs_mtx = &sc->vsc_mtx;

	/* use BAR 1 to map MSI-X table and PBA, if we're using MSI-X */			/* use BAR 1 to map MSI-X table and PBA, if we're using MSI-X */
	if (vi_intr_init(&sc->vsc_vs, 1, fbsdrun_virtio_msix())) {			if (vi_intr_init(&sc->vsc_vs, 1, fbsdrun_virtio_msix())) {
	free(sc);			free(sc);
	return (1);			return (1);
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	done:			done:
	return (ret);			return (ret);
	}			}
	#endif			#endif

	static struct pci_devemu pci_de_vnet = {			static struct pci_devemu pci_de_vnet = {
	.pe_emu = "virtio-net",			.pe_emu = "virtio-net",
	.pe_init = pci_vtnet_init,			.pe_init = pci_vtnet_init,
				.pe_legacy_config = netbe_legacy_config,
	.pe_barwrite = vi_pci_write,			.pe_barwrite = vi_pci_write,
	.pe_barread = vi_pci_read,			.pe_barread = vi_pci_read,
	#ifdef BHYVE_SNAPSHOT			#ifdef BHYVE_SNAPSHOT
	.pe_snapshot = vi_pci_snapshot,			.pe_snapshot = vi_pci_snapshot,
	.pe_pause = vi_pci_pause,			.pe_pause = vi_pci_pause,
	.pe_resume = vi_pci_resume,			.pe_resume = vi_pci_resume,
	#endif			#endif
	};			};
	PCI_EMUL_SET(pci_de_vnet);			PCI_EMUL_SET(pci_de_vnet);