Differential D19495 Diff 58265 usr.sbin/bhyve/pci_virtio_net.c

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usr.sbin/bhyve/pci_virtio_net.c

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#ifndef NETMAP_WITH_LIBS		#ifndef NETMAP_WITH_LIBS
#define NETMAP_WITH_LIBS		#define NETMAP_WITH_LIBS
#endif		#endif
#include <net/netmap_user.h>		#include <net/netmap_user.h>

#ifndef WITHOUT_CAPSICUM		#ifndef WITHOUT_CAPSICUM
#include <capsicum_helpers.h>		#include <capsicum_helpers.h>
#endif		#endif
		#include <machine/vmm_snapshot.h>

#include <err.h>		#include <err.h>
#include <errno.h>		#include <errno.h>
#include <fcntl.h>		#include <fcntl.h>
#include <stdio.h>		#include <stdio.h>
#include <stdlib.h>		#include <stdlib.h>
#include <stdint.h>		#include <stdint.h>
#include <string.h>		#include <string.h>
#include <strings.h>		#include <strings.h>
▲ Show 20 Lines • Show All 107 Lines • ▼ Show 20 Lines	struct pci_vtnet_softc {
int tx_in_progress;		int tx_in_progress;

void (pci_vtnet_rx)(struct pci_vtnet_softc sc);		void (pci_vtnet_rx)(struct pci_vtnet_softc sc);
void (pci_vtnet_tx)(struct pci_vtnet_softc sc, struct iovec *iov,		void (pci_vtnet_tx)(struct pci_vtnet_softc sc, struct iovec *iov,
int iovcnt, int len);		int iovcnt, int len);
};		};

static void pci_vtnet_reset(void *);		static void pci_vtnet_reset(void *);
		static void pci_vtnet_pause(void *);
		static void pci_vtnet_resume(void *);
		static int pci_vtnet_snapshot(void , struct vm_snapshot_meta );
/* static void pci_vtnet_notify(void , struct vqueue_info ); */		/* static void pci_vtnet_notify(void , struct vqueue_info ); */
static int pci_vtnet_cfgread(void , int, int, uint32_t );		static int pci_vtnet_cfgread(void , int, int, uint32_t );
static int pci_vtnet_cfgwrite(void *, int, int, uint32_t);		static int pci_vtnet_cfgwrite(void *, int, int, uint32_t);
static void pci_vtnet_neg_features(void *, uint64_t);		static void pci_vtnet_neg_features(void *, uint64_t);

static struct virtio_consts vtnet_vi_consts = {		static struct virtio_consts vtnet_vi_consts = {
"vtnet", /* our name */		"vtnet", /* our name */
VTNET_MAXQ - 1, /* we currently support 2 virtqueues */		VTNET_MAXQ - 1, /* we currently support 2 virtqueues */
sizeof(struct virtio_net_config), /* config reg size */		sizeof(struct virtio_net_config), /* config reg size */
pci_vtnet_reset, /* reset */		pci_vtnet_reset, /* reset */
NULL, /* device-wide qnotify -- not used */		NULL, /* device-wide qnotify -- not used */
pci_vtnet_cfgread, /* read PCI config */		pci_vtnet_cfgread, /* read PCI config */
pci_vtnet_cfgwrite, /* write PCI config */		pci_vtnet_cfgwrite, /* write PCI config */
pci_vtnet_neg_features, /* apply negotiated features */		pci_vtnet_neg_features, /* apply negotiated features */
VTNET_S_HOSTCAPS, /* our capabilities */		VTNET_S_HOSTCAPS, /* our capabilities */
		pci_vtnet_pause, /* pause rx/tx threads */
		pci_vtnet_resume, /* resume rx/tx threads */
		pci_vtnet_snapshot, /* save / restore device state */
};		};

/*		/*
* If the transmit thread is active then stall until it is done.		* If the transmit thread is active then stall until it is done.
*/		*/
static void		static void
pci_vtnet_txwait(struct pci_vtnet_softc *sc)		pci_vtnet_txwait(struct pci_vtnet_softc *sc)
{		{
▲ Show 20 Lines • Show All 44 Lines • ▼ Show 20 Lines	pci_vtnet_reset(void *vsc)
sc->rx_vhdrlen = sizeof(struct virtio_net_rxhdr);		sc->rx_vhdrlen = sizeof(struct virtio_net_rxhdr);

/* now reset rings, MSI-X vectors, and negotiated capabilities */		/* now reset rings, MSI-X vectors, and negotiated capabilities */
vi_reset_dev(&sc->vsc_vs);		vi_reset_dev(&sc->vsc_vs);

sc->resetting = 0;		sc->resetting = 0;
}		}

		static void
		pci_vtnet_pause(void *vsc)
		{
		struct pci_vtnet_softc *sc = vsc;

		DPRINTF(("vtnet: device pause requested !\n"));

		pthread_mutex_lock(&sc->tx_mtx);
		pthread_mutex_lock(&sc->rx_mtx);
		sc->resetting = 1;
		pthread_mutex_unlock(&sc->rx_mtx);
		pthread_mutex_unlock(&sc->tx_mtx);

/*		/*
		* Wait for the transmit and receive threads to finish their
		* processing.
		*/
		pci_vtnet_txwait(sc);
		pci_vtnet_rxwait(sc);
		}

		static void
		pci_vtnet_resume(void *vsc)
		{
		struct pci_vtnet_softc *sc = vsc;

		DPRINTF(("vtnet: device resume requested !\n"));

		pthread_mutex_lock(&sc->tx_mtx);
		pthread_mutex_lock(&sc->rx_mtx);
		sc->resetting = 0;
		pthread_mutex_unlock(&sc->rx_mtx);
		pthread_mutex_unlock(&sc->tx_mtx);
		}

		static int
		pci_vtnet_snapshot(void vsc, struct vm_snapshot_meta meta)
		{
		int ret;
		struct pci_vtnet_softc *sc = vsc;

		DPRINTF(("vtnet: device snapshot requested !\n"));

		/*
		* Queues and consts should have been saved by the more generic
		* vi_pci_snapshot function. We need to save only our features and
		* config.
		*/

		SNAPSHOT_VAR_OR_LEAVE(sc->vsc_features, meta, ret, done);
		SNAPSHOT_VAR_OR_LEAVE(sc->vsc_config, meta, ret, done);
		SNAPSHOT_VAR_OR_LEAVE(sc->rx_vhdrlen, meta, ret, done);
		SNAPSHOT_VAR_OR_LEAVE(sc->rx_merge, meta, ret, done);
		SNAPSHOT_VAR_OR_LEAVE(sc->vsc_rx_ready, meta, ret, done);

		done:
		return (ret);
		}

		/*
* Called to send a buffer chain out to the tap device		* Called to send a buffer chain out to the tap device
*/		*/
static void		static void
pci_vtnet_tap_tx(struct pci_vtnet_softc sc, struct iovec iov, int iovcnt,		pci_vtnet_tap_tx(struct pci_vtnet_softc sc, struct iovec iov, int iovcnt,
int len)		int len)
{		{
static char pad[60]; /* all zero bytes */		static char pad[60]; /* all zero bytes */

▲ Show 20 Lines • Show All 726 Lines • ▼ Show 20 Lines	if (!(sc->vsc_features & VIRTIO_NET_F_MRG_RXBUF)) {
sc->rx_vhdrlen -= 2;		sc->rx_vhdrlen -= 2;
}		}
}		}

struct pci_devemu pci_de_vnet = {		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_barwrite = vi_pci_write,		.pe_barwrite = vi_pci_write,
.pe_barread = vi_pci_read		.pe_barread = vi_pci_read,
		.pe_snapshot = vi_pci_snapshot,
};		};
PCI_EMUL_SET(pci_de_vnet);		PCI_EMUL_SET(pci_de_vnet);