Differential D19495 Diff 69728 usr.sbin/bhyve/pci_virtio_net.c

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usr.sbin/bhyve/pci_virtio_net.c

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#include <sys/cdefs.h>		#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");		__FBSDID("$FreeBSD$");

#include <sys/param.h>		#include <sys/param.h>
#include <sys/linker_set.h>		#include <sys/linker_set.h>
#include <sys/select.h>		#include <sys/select.h>
#include <sys/uio.h>		#include <sys/uio.h>
#include <sys/ioctl.h>		#include <sys/ioctl.h>
		#include <machine/vmm_snapshot.h>
#include <net/ethernet.h>		#include <net/ethernet.h>
#include <net/if.h> /* IFNAMSIZ */		#include <net/if.h> /* IFNAMSIZ */

#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>
▲ Show 20 Lines • Show All 77 Lines • ▼ Show 20 Lines	struct pci_vtnet_softc {
struct virtio_consts vsc_consts;		struct virtio_consts vsc_consts;
};		};

static void pci_vtnet_reset(void *);		static void pci_vtnet_reset(void *);
/* 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);
		#ifdef BHYVE_SNAPSHOT
		static void pci_vtnet_pause(void *);
		static void pci_vtnet_resume(void *);
		static int pci_vtnet_snapshot(void , struct vm_snapshot_meta );
		#endif

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 */
		#ifdef BHYVE_SNAPSHOT
		pci_vtnet_pause, /* pause rx/tx threads */
		pci_vtnet_resume, /* resume rx/tx threads */
		pci_vtnet_snapshot, /* save / restore device state */
		#endif
};		};

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

DPRINTF(("vtnet: device reset requested !"));		DPRINTF(("vtnet: device reset requested !"));
▲ Show 20 Lines • Show All 554 Lines • ▼ Show 20 Lines	pci_vtnet_neg_features(void *vsc, uint64_t negotiated_features)
}		}

/* Tell the backend to enable some capabilities it has advertised. */		/* Tell the backend to enable some capabilities it has advertised. */
netbe_set_cap(sc->vsc_be, negotiated_features, sc->vhdrlen);		netbe_set_cap(sc->vsc_be, negotiated_features, sc->vhdrlen);
sc->be_vhdrlen = netbe_get_vnet_hdr_len(sc->vsc_be);		sc->be_vhdrlen = netbe_get_vnet_hdr_len(sc->vsc_be);
assert(sc->be_vhdrlen == 0 \|\| sc->be_vhdrlen == sc->vhdrlen);		assert(sc->be_vhdrlen == 0 \|\| sc->be_vhdrlen == sc->vhdrlen);
}		}

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

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

		/* Acquire the RX lock to block RX processing. */
		pthread_mutex_lock(&sc->rx_mtx);

		/* Wait for the transmit thread to finish its processing. */
		pthread_mutex_lock(&sc->tx_mtx);
		while (sc->tx_in_progress) {
		pthread_mutex_unlock(&sc->tx_mtx);
		usleep(10000);
		pthread_mutex_lock(&sc->tx_mtx);
		}
		}

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

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

		pthread_mutex_unlock(&sc->tx_mtx);
		/* The RX lock should have been acquired in vtnet_pause. */
		pthread_mutex_unlock(&sc->rx_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);

		/* Force reapply negociated features at restore time */
		if (meta->op == VM_SNAPSHOT_RESTORE) {
		pci_vtnet_neg_features(sc, sc->vsc_features);
		netbe_rx_enable(sc->vsc_be);
		}

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

		SNAPSHOT_VAR_OR_LEAVE(sc->vhdrlen, meta, ret, done);
		SNAPSHOT_VAR_OR_LEAVE(sc->be_vhdrlen, meta, ret, done);

		done:
		return (ret);
		}
		#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_barwrite = vi_pci_write,		.pe_barwrite = vi_pci_write,
.pe_barread = vi_pci_read		.pe_barread = vi_pci_read,
		#ifdef BHYVE_SNAPSHOT
		.pe_snapshot = vi_pci_snapshot,
		.pe_pause = vi_pci_pause,
		.pe_resume = vi_pci_resume,
		#endif
};		};
PCI_EMUL_SET(pci_de_vnet);		PCI_EMUL_SET(pci_de_vnet);