Differential D19495 Diff 59599 usr.sbin/bhyve/pci_virtio_block.c

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usr.sbin/bhyve/pci_virtio_block.c

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#include <sys/param.h>		#include <sys/param.h>
#include <sys/linker_set.h>		#include <sys/linker_set.h>
#include <sys/stat.h>		#include <sys/stat.h>
#include <sys/uio.h>		#include <sys/uio.h>
#include <sys/ioctl.h>		#include <sys/ioctl.h>
#include <sys/disk.h>		#include <sys/disk.h>

		#include <machine/vmm_snapshot.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>
#include <unistd.h>		#include <unistd.h>
▲ Show 20 Lines • Show All 90 Lines • ▼ Show 20 Lines	struct pci_vtblk_softc {
struct vqueue_info vbsc_vq;		struct vqueue_info vbsc_vq;
struct vtblk_config vbsc_cfg;		struct vtblk_config vbsc_cfg;
struct blockif_ctxt *bc;		struct blockif_ctxt *bc;
char vbsc_ident[VTBLK_BLK_ID_BYTES];		char vbsc_ident[VTBLK_BLK_ID_BYTES];
struct pci_vtblk_ioreq vbsc_ios[VTBLK_RINGSZ];		struct pci_vtblk_ioreq vbsc_ios[VTBLK_RINGSZ];
};		};

static void pci_vtblk_reset(void *);		static void pci_vtblk_reset(void *);
		static void pci_vtblk_pause(void *);
		static void pci_vtblk_resume(void *);
		static int pci_vtblk_snapshot(void , struct vm_snapshot_meta );
static void pci_vtblk_notify(void , struct vqueue_info );		static void pci_vtblk_notify(void , struct vqueue_info );
static int pci_vtblk_cfgread(void , int, int, uint32_t );		static int pci_vtblk_cfgread(void , int, int, uint32_t );
static int pci_vtblk_cfgwrite(void *, int, int, uint32_t);		static int pci_vtblk_cfgwrite(void *, int, int, uint32_t);

static struct virtio_consts vtblk_vi_consts = {		static struct virtio_consts vtblk_vi_consts = {
"vtblk", /* our name */		"vtblk", /* our name */
1, /* we support 1 virtqueue */		1, /* we support 1 virtqueue */
sizeof(struct vtblk_config), /* config reg size */		sizeof(struct vtblk_config), /* config reg size */
pci_vtblk_reset, /* reset */		pci_vtblk_reset, /* reset */
pci_vtblk_notify, /* device-wide qnotify */		pci_vtblk_notify, /* device-wide qnotify */
pci_vtblk_cfgread, /* read PCI config */		pci_vtblk_cfgread, /* read PCI config */
pci_vtblk_cfgwrite, /* write PCI config */		pci_vtblk_cfgwrite, /* write PCI config */
NULL, /* apply negotiated features */		NULL, /* apply negotiated features */
VTBLK_S_HOSTCAPS, /* our capabilities */		VTBLK_S_HOSTCAPS, /* our capabilities */
		pci_vtblk_pause, /* pause blockif threads */
		pci_vtblk_resume, /* resume blockif threads */
		pci_vtblk_snapshot, /* save / restore device state */
};		};

static void		static void
pci_vtblk_reset(void *vsc)		pci_vtblk_reset(void *vsc)
{		{
struct pci_vtblk_softc *sc = vsc;		struct pci_vtblk_softc *sc = vsc;

DPRINTF(("vtblk: device reset requested !\n"));		DPRINTF(("vtblk: device reset requested !\n"));
vi_reset_dev(&sc->vbsc_vs);		vi_reset_dev(&sc->vbsc_vs);
}		}

static void		static void
		pci_vtblk_pause(void *vsc)
		{
		struct pci_vtblk_softc *sc = vsc;

		DPRINTF(("vtblk: device pause requested !\n"));
		blockif_pause(sc->bc);
		}

		static void
		pci_vtblk_resume(void *vsc)
		{
		struct pci_vtblk_softc *sc = vsc;

		DPRINTF(("vtblk: device resume requested !\n"));
		blockif_resume(sc->bc);
		}

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

		SNAPSHOT_VAR_OR_LEAVE(sc->vbsc_cfg, meta, ret, done);
		SNAPSHOT_BUF_OR_LEAVE(sc->vbsc_ident, sizeof(sc->vbsc_ident),
		meta, ret, done);

		done:
		return (ret);
		}

		static void
pci_vtblk_done(struct blockif_req *br, int err)		pci_vtblk_done(struct blockif_req *br, int err)
{		{
struct pci_vtblk_ioreq *io = br->br_param;		struct pci_vtblk_ioreq *io = br->br_param;
struct pci_vtblk_softc *sc = io->io_sc;		struct pci_vtblk_softc *sc = io->io_sc;

/* convert errno into a virtio block error return */		/* convert errno into a virtio block error return */
if (err == EOPNOTSUPP \|\| err == ENOSYS)		if (err == EOPNOTSUPP \|\| err == ENOSYS)
*io->io_status = VTBLK_S_UNSUPP;		*io->io_status = VTBLK_S_UNSUPP;
▲ Show 20 Lines • Show All 222 Lines • ▼ Show 20 Lines	pci_vtblk_cfgread(void vsc, int offset, int size, uint32_t retval)
memcpy(retval, ptr, size);		memcpy(retval, ptr, size);
return (0);		return (0);
}		}

struct pci_devemu pci_de_vblk = {		struct pci_devemu pci_de_vblk = {
.pe_emu = "virtio-blk",		.pe_emu = "virtio-blk",
.pe_init = pci_vtblk_init,		.pe_init = pci_vtblk_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_vblk);		PCI_EMUL_SET(pci_de_vblk);