C++ device_get_parent函数代码示例

void
pcib_write_config(device_t dev, int b, int s, int f, int reg, u_int32_t val, int width)
{
    PCIB_WRITE_CONFIG(device_get_parent(device_get_parent(dev)), b, s, f, reg, val, width);
}

static int
pci_iov_delete(struct cdev *cdev)
{
	device_t bus, dev, vf, *devlist;
	struct pci_devinfo *dinfo;
	struct pcicfg_iov *iov;
	int i, error, devcount;
	uint32_t iov_ctl;

	mtx_lock(&Giant);
	dinfo = cdev->si_drv1;
	iov = dinfo->cfg.iov;
	dev = dinfo->cfg.dev;
	bus = device_get_parent(dev);
	devlist = NULL;

	if (iov->iov_flags & IOV_BUSY) {
		mtx_unlock(&Giant);
		return (EBUSY);
	}

	if (iov->iov_num_vfs == 0) {
		mtx_unlock(&Giant);
		return (ECHILD);
	}

	iov->iov_flags |= IOV_BUSY;

	error = device_get_children(bus, &devlist, &devcount);

	if (error != 0)
		goto out;

	for (i = 0; i < devcount; i++) {
		vf = devlist[i];

		if (!pci_iov_is_child_vf(iov, vf))
			continue;

		error = device_detach(vf);
		if (error != 0) {
			device_printf(dev,
			   "Could not disable SR-IOV: failed to detach VF %s\n",
			    device_get_nameunit(vf));
			goto out;
		}
	}

	for (i = 0; i < devcount; i++) {
		vf = devlist[i];

		if (pci_iov_is_child_vf(iov, vf))
			device_delete_child(bus, vf);
	}
	PCI_IOV_UNINIT(dev);

	iov_ctl = IOV_READ(dinfo, PCIR_SRIOV_CTL, 2);
	iov_ctl &= ~(PCIM_SRIOV_VF_EN | PCIM_SRIOV_VF_MSE);
	IOV_WRITE(dinfo, PCIR_SRIOV_CTL, iov_ctl, 2);
	IOV_WRITE(dinfo, PCIR_SRIOV_NUM_VFS, 0, 2);

	iov->iov_num_vfs = 0;

	for (i = 0; i <= PCIR_MAX_BAR_0; i++) {
		if (iov->iov_bar[i].res != NULL) {
			pci_release_resource(bus, dev, SYS_RES_MEMORY,
			    iov->iov_pos + PCIR_SRIOV_BAR(i),
			    iov->iov_bar[i].res);
			pci_delete_resource(bus, dev, SYS_RES_MEMORY,
			    iov->iov_pos + PCIR_SRIOV_BAR(i));
			iov->iov_bar[i].res = NULL;
		}
	}

	if (iov->iov_flags & IOV_RMAN_INITED) {
		rman_fini(&iov->rman);
		iov->iov_flags &= ~IOV_RMAN_INITED;
	}

	error = 0;
out:
	free(devlist, M_TEMP);
	iov->iov_flags &= ~IOV_BUSY;
	mtx_unlock(&Giant);
	return (error);
}

static int
sata_channel_attach(device_t dev)
{
	struct sata_softc *sc;
	struct ata_channel *ch;
	uint64_t work;
	int error, i;

	sc = device_get_softc(device_get_parent(dev));
	ch = device_get_softc(dev);

	if (ch->attached)
		return (0);

	ch->dev = dev;
	ch->unit = device_get_unit(dev);
	ch->flags |= ATA_USE_16BIT | ATA_NO_SLAVE | ATA_SATA;

	/* Set legacy ATA resources. */
	for (i = ATA_DATA; i <= ATA_COMMAND; i++) {
		ch->r_io[i].res = sc->sc_mem_res;
		ch->r_io[i].offset = SATA_SHADOWR_BASE(ch->unit) + (i << 2);
	}

	ch->r_io[ATA_CONTROL].res = sc->sc_mem_res;
	ch->r_io[ATA_CONTROL].offset = SATA_SHADOWR_CONTROL(ch->unit);

	ch->r_io[ATA_IDX_ADDR].res = sc->sc_mem_res;
	ata_default_registers(dev);

	/* Set SATA resources. */
	ch->r_io[ATA_SSTATUS].res = sc->sc_mem_res;
	ch->r_io[ATA_SSTATUS].offset = SATA_SATA_SSTATUS(ch->unit);
	ch->r_io[ATA_SERROR].res = sc->sc_mem_res;
	ch->r_io[ATA_SERROR].offset = SATA_SATA_SERROR(ch->unit);
	ch->r_io[ATA_SCONTROL].res = sc->sc_mem_res;
	ch->r_io[ATA_SCONTROL].offset = SATA_SATA_SCONTROL(ch->unit);
	ata_generic_hw(dev);

	ch->hw.begin_transaction = sata_channel_begin_transaction;
	ch->hw.end_transaction = sata_channel_end_transaction;
	ch->hw.status = sata_channel_status;

	/* Set DMA resources */
	ata_dmainit(dev);
	ch->dma.setprd = sata_channel_dmasetprd;

	/* Clear work area */
	KASSERT(sc->sc_edma_qlen * (sizeof(struct sata_crqb) +
	    sizeof(struct sata_crpb)) <= ch->dma.max_iosize,
	    ("insufficient DMA memory for request/response queues.\n"));
	bzero(ch->dma.work, sc->sc_edma_qlen * (sizeof(struct sata_crqb) +
	    sizeof(struct sata_crpb)));
	bus_dmamap_sync(ch->dma.work_tag, ch->dma.work_map,
	    BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);

	/* Turn off EDMA engine */
	error = sata_edma_ctrl(dev, 0);
	if (error) {
		ata_dmafini(dev);
		return (error);
	}

	/*
	 * Initialize EDMA engine:
	 *	- Native Command Queuing off,
	 *	- Non-Queued operation,
	 *	- Host Queue Cache enabled.
	 */
	SATA_OUTL(sc, SATA_EDMA_CFG(ch->unit), SATA_EDMA_CFG_HQCACHE |
	    (sc->sc_version == 1) ? SATA_EDMA_CFG_QL128 : 0);

	/* Set request queue pointers */
	work = ch->dma.work_bus;
	SATA_OUTL(sc, SATA_EDMA_REQBAHR(ch->unit), work >> 32);
	SATA_OUTL(sc, SATA_EDMA_REQIPR(ch->unit), work & 0xFFFFFFFF);
	SATA_OUTL(sc, SATA_EDMA_REQOPR(ch->unit), work & 0xFFFFFFFF);

	/* Set response queue pointers */
	work += sc->sc_edma_qlen * sizeof(struct sata_crqb);
	SATA_OUTL(sc, SATA_EDMA_RESBAHR(ch->unit), work >> 32);
	SATA_OUTL(sc, SATA_EDMA_RESIPR(ch->unit), work & 0xFFFFFFFF);
	SATA_OUTL(sc, SATA_EDMA_RESOPR(ch->unit), work & 0xFFFFFFFF);

	/* Clear any outstanding interrupts */
	ATA_IDX_OUTL(ch, ATA_SERROR, ATA_IDX_INL(ch, ATA_SERROR));
	SATA_OUTL(sc, SATA_SATA_FISICR(ch->unit), 0);
	SATA_OUTL(sc, SATA_EDMA_IECR(ch->unit), 0);
	SATA_OUTL(sc, SATA_ICR,
	    ~(SATA_ICR_DEV(ch->unit) | SATA_ICR_DMADONE(ch->unit)));

	/* Umask channel interrupts */
	SATA_OUTL(sc, SATA_EDMA_IEMR(ch->unit), 0xFFFFFFFF);
	SATA_OUTL(sc, SATA_MIMR, SATA_INL(sc, SATA_MIMR) |
	    SATA_MICR_DONE(ch->unit) | SATA_MICR_DMADONE(ch->unit) |
	    SATA_MICR_ERR(ch->unit));

	ch->attached = 1;

	return (ata_attach(dev));
//.........这里部分代码省略.........

static int
ata_getparam(struct ata_device *atadev, int init)
{
    struct ata_channel *ch = device_get_softc(device_get_parent(atadev->dev));
    struct ata_request *request;
    u_int8_t command = 0;
    int error = ENOMEM, retries = 2;

    if (ch->devices &
	(atadev->unit == ATA_MASTER ? ATA_ATA_MASTER : ATA_ATA_SLAVE))
	command = ATA_ATA_IDENTIFY;
    if (ch->devices &
	(atadev->unit == ATA_MASTER ? ATA_ATAPI_MASTER : ATA_ATAPI_SLAVE))
	command = ATA_ATAPI_IDENTIFY;
    if (!command)
	return ENXIO;

    while (retries-- > 0 && error) {
	if (!(request = ata_alloc_request()))
	    break;
	request->dev = atadev->dev;
	request->timeout = 1;
	request->retries = 0;
	request->u.ata.command = command;
	request->flags = (ATA_R_READ|ATA_R_AT_HEAD|ATA_R_DIRECT|ATA_R_QUIET);
	request->data = (void *)&atadev->param;
	request->bytecount = sizeof(struct ata_params);
	request->donecount = 0;
	request->transfersize = DEV_BSIZE;
	ata_queue_request(request);
	error = request->result;
	ata_free_request(request);
    }

    if (!error && (isprint(atadev->param.model[0]) ||
		   isprint(atadev->param.model[1]))) {
	struct ata_params *atacap = &atadev->param;
	char buffer[64];
	int16_t *ptr;

	for (ptr = (int16_t *)atacap;
	     ptr < (int16_t *)atacap + sizeof(struct ata_params)/2; ptr++) {
	    *ptr = le16toh(*ptr);
	}
	if (!(!strncmp(atacap->model, "FX", 2) ||
	      !strncmp(atacap->model, "NEC", 3) ||
	      !strncmp(atacap->model, "Pioneer", 7) ||
	      !strncmp(atacap->model, "SHARP", 5))) {
	    bswap(atacap->model, sizeof(atacap->model));
	    bswap(atacap->revision, sizeof(atacap->revision));
	    bswap(atacap->serial, sizeof(atacap->serial));
	}
	btrim(atacap->model, sizeof(atacap->model));
	bpack(atacap->model, atacap->model, sizeof(atacap->model));
	btrim(atacap->revision, sizeof(atacap->revision));
	bpack(atacap->revision, atacap->revision, sizeof(atacap->revision));
	btrim(atacap->serial, sizeof(atacap->serial));
	bpack(atacap->serial, atacap->serial, sizeof(atacap->serial));

	if (bootverbose)
	    kprintf("ata%d-%s: pio=%s wdma=%s udma=%s cable=%s wire\n",
		   device_get_unit(ch->dev),
		   atadev->unit == ATA_MASTER ? "master" : "slave",
		   ata_mode2str(ata_pmode(atacap)),
		   ata_mode2str(ata_wmode(atacap)),
		   ata_mode2str(ata_umode(atacap)),
		   (atacap->hwres & ATA_CABLE_ID) ? "80":"40");

	if (init) {
	    ksprintf(buffer, "%.40s/%.8s", atacap->model, atacap->revision);
	    device_set_desc_copy(atadev->dev, buffer);
	    if ((atadev->param.config & ATA_PROTO_ATAPI) &&
		(atadev->param.config != ATA_CFA_MAGIC1) &&
		(atadev->param.config != ATA_CFA_MAGIC2)) {
		if (atapi_dma && ch->dma &&
		    (atadev->param.config & ATA_DRQ_MASK) != ATA_DRQ_INTR &&
		    ata_umode(&atadev->param) >= ATA_UDMA2)
		    atadev->mode = ATA_DMA_MAX;
	    }
	    else {
		if (ata_dma && ch->dma &&
		    (ata_umode(&atadev->param) > 0 ||
		     ata_wmode(&atadev->param) > 0))
		    atadev->mode = ATA_DMA_MAX;
	    }
	}
    }
    else {
	if (!error)
	    error = ENXIO;
    }
    return error;
}

int
fdt_get_phyaddr(phandle_t node, device_t dev, int *phy_addr, void **phy_sc)
{
	phandle_t phy_node;
	pcell_t phy_handle, phy_reg;
	uint32_t i;
	device_t parent, child;

	if (OF_getencprop(node, "phy-handle", (void *)&phy_handle,
	    sizeof(phy_handle)) <= 0)
		return (ENXIO);

	phy_node = OF_node_from_xref(phy_handle);

	if (OF_getencprop(phy_node, "reg", (void *)&phy_reg,
	    sizeof(phy_reg)) <= 0)
		return (ENXIO);

	*phy_addr = phy_reg;

	/*
	 * Search for softc used to communicate with phy.
	 */

	/*
	 * Step 1: Search for ancestor of the phy-node with a "phy-handle"
	 * property set.
	 */
	phy_node = OF_parent(phy_node);
	while (phy_node != 0) {
		if (OF_getprop(phy_node, "phy-handle", (void *)&phy_handle,
		    sizeof(phy_handle)) > 0)
			break;
		phy_node = OF_parent(phy_node);
	}
	if (phy_node == 0)
		return (ENXIO);

	/*
	 * Step 2: For each device with the same parent and name as ours
	 * compare its node with the one found in step 1, ancestor of phy
	 * node (stored in phy_node).
	 */
	parent = device_get_parent(dev);
	i = 0;
	child = device_find_child(parent, device_get_name(dev), i);
	while (child != NULL) {
		if (ofw_bus_get_node(child) == phy_node)
			break;
		i++;
		child = device_find_child(parent, device_get_name(dev), i);
	}
	if (child == NULL)
		return (ENXIO);

	/*
	 * Use softc of the device found.
	 */
	*phy_sc = (void *)device_get_softc(child);

	return (0);
}

static int
atkbdc_isa_probe(device_t dev)
{
	struct resource	*port0;
	struct resource	*port1;
	u_long		start;
	u_long		count;
	int		error;
	int		rid;
#if defined(__i386__) || defined(__amd64__)
	bus_space_tag_t	tag;
	bus_space_handle_t ioh1;
	volatile int	i;
	register_t	flags;
#endif

	/* check PnP IDs */
	if (ISA_PNP_PROBE(device_get_parent(dev), dev, atkbdc_ids) == ENXIO)
		return ENXIO;

	device_set_desc(dev, "Keyboard controller (i8042)");

	/*
	 * Adjust I/O port resources.
	 * The AT keyboard controller uses two ports (a command/data port
	 * 0x60 and a status port 0x64), which may be given to us in 
	 * one resource (0x60 through 0x64) or as two separate resources
	 * (0x60 and 0x64). Some brain-damaged ACPI BIOS has reversed
	 * command/data port and status port. Furthermore, /boot/device.hints
	 * may contain just one port, 0x60. We shall adjust resource settings
	 * so that these two ports are available as two separate resources
	 * in correct order.
	 */
	device_quiet(dev);
	rid = 0;
	if (bus_get_resource(dev, SYS_RES_IOPORT, rid, &start, &count) != 0)
		return ENXIO;
	if (start == IO_KBD + KBD_STATUS_PORT) {
		start = IO_KBD;
		count++;
	}
	if (count > 1)	/* adjust the count and/or start port */
		bus_set_resource(dev, SYS_RES_IOPORT, rid, start, 1);
	port0 = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, RF_ACTIVE);
	if (port0 == NULL)
		return ENXIO;
	rid = 1;
	if (bus_get_resource(dev, SYS_RES_IOPORT, rid, NULL, NULL) != 0)
		bus_set_resource(dev, SYS_RES_IOPORT, 1,
				 start + KBD_STATUS_PORT, 1);
	port1 = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, RF_ACTIVE);
	if (port1 == NULL) {
		bus_release_resource(dev, SYS_RES_IOPORT, 0, port0);
		return ENXIO;
	}

#if defined(__i386__) || defined(__amd64__)
	/*
	 * Check if we really have AT keyboard controller. Poll status
	 * register until we get "all clear" indication. If no such
	 * indication comes, it probably means that there is no AT
	 * keyboard controller present. Give up in such case. Check relies
	 * on the fact that reading from non-existing in/out port returns
	 * 0xff on i386. May or may not be true on other platforms.
	 */
	tag = rman_get_bustag(port0);
	ioh1 = rman_get_bushandle(port1);
	flags = intr_disable();
	for (i = 0; i != 65535; i++) {
		if ((bus_space_read_1(tag, ioh1, 0) & 0x2) == 0)
			break;
	}
	intr_restore(flags);
	if (i == 65535) {
		bus_release_resource(dev, SYS_RES_IOPORT, 0, port0);
		bus_release_resource(dev, SYS_RES_IOPORT, 1, port1);
		if (bootverbose)
			device_printf(dev, "AT keyboard controller not found\n");
		return ENXIO;
	}
#endif

	device_verbose(dev);

	error = atkbdc_probe_unit(device_get_unit(dev), port0, port1);

	bus_release_resource(dev, SYS_RES_IOPORT, 0, port0);
	bus_release_resource(dev, SYS_RES_IOPORT, 1, port1);

	return error;
}

/* must be called with ATA channel locked and state_mtx held */
int
ata_end_transaction(struct ata_request *request)
{
    struct ata_channel *ch = device_get_softc(device_get_parent(request->dev));
    struct ata_device *atadev = device_get_softc(request->dev);
    int length;

    ATA_DEBUG_RQ(request, "end transaction");

    /* clear interrupt and get status */
    request->status = ATA_IDX_INB(ch, ATA_STATUS);

    switch (request->flags & (ATA_R_ATAPI | ATA_R_DMA | ATA_R_CONTROL)) {

    /* ATA PIO data transfer and control commands */
    default:

	/* on timeouts we have no data or anything so just return */
	if (request->flags & ATA_R_TIMEOUT)
	    goto end_finished;

	/* on control commands read back registers to the request struct */
	if (request->flags & ATA_R_CONTROL) {
	    ch->hw.tf_read(request);
	}

	/* if we got an error we are done with the HW */
	if (request->status & ATA_S_ERROR) {
	    request->error = ATA_IDX_INB(ch, ATA_ERROR);
	    goto end_finished;
	}
	
	/* are we moving data ? */
	if (request->flags & (ATA_R_READ | ATA_R_WRITE)) {

	    /* if read data get it */
	    if (request->flags & ATA_R_READ) {
		int flags = ATA_S_DRQ;

		if (request->u.ata.command != ATA_ATAPI_IDENTIFY)
		    flags |= ATA_S_READY;
		if (ata_wait(ch, atadev, flags) < 0) {
		    device_printf(request->dev,
				  "timeout waiting for read DRQ\n");
		    request->result = EIO;
		    goto end_finished;
		}
		ata_pio_read(request, request->transfersize);
	    }

	    /* update how far we've gotten */
	    request->donecount += request->transfersize;

	    /* do we need a scoop more ? */
	    if (request->bytecount > request->donecount) {

		/* set this transfer size according to HW capabilities */
		request->transfersize = 
		    min((request->bytecount - request->donecount),
			request->transfersize);

		/* if data write command, output the data */
		if (request->flags & ATA_R_WRITE) {

		    /* if we get an error here we are done with the HW */
		    if (ata_wait(ch, atadev, (ATA_S_READY | ATA_S_DRQ)) < 0) {
			device_printf(request->dev,
				      "timeout waiting for write DRQ\n");
			request->status = ATA_IDX_INB(ch, ATA_STATUS);
			goto end_finished;
		    }

		    /* output data and return waiting for new interrupt */
		    ata_pio_write(request, request->transfersize);
		    goto end_continue;
		}

		/* if data read command, return & wait for interrupt */
		if (request->flags & ATA_R_READ)
		    goto end_continue;
	    }
	}
	/* done with HW */
	goto end_finished;

    /* ATA DMA data transfer commands */
    case ATA_R_DMA:

	/* stop DMA engine and get status */
	if (ch->dma->stop)
	    request->dmastat = ch->dma->stop(request->dev);

	/* did we get error or data */
	if (request->status & ATA_S_ERROR)
	    request->error = ATA_IDX_INB(ch, ATA_ERROR);
	else if (request->dmastat & ATA_BMSTAT_ERROR)
	    request->status |= ATA_S_ERROR;
	else if (!(request->flags & ATA_R_TIMEOUT))
	    request->donecount = request->bytecount;
//.........这里部分代码省略.........

int
ata_generic_command(struct ata_request *request)
{
    struct ata_channel *ch = device_get_softc(device_get_parent(request->dev));
    struct ata_device *atadev = device_get_softc(request->dev);

    /* select device */
    ATA_IDX_OUTB(ch, ATA_DRIVE, ATA_D_IBM | ATA_D_LBA | atadev->unit);

    /* ready to issue command ? */
    if (ata_wait(ch, atadev, 0) < 0) { 
	device_printf(request->dev, "timeout waiting to issue command\n");
	return -1;
    }

    /* enable interrupt */
    ATA_IDX_OUTB(ch, ATA_CONTROL, ATA_A_4BIT);

    if (request->flags & ATA_R_ATAPI) {
	int timeout = 5000;

	/* issue packet command to controller */
	if (request->flags & ATA_R_DMA) {
	    ATA_IDX_OUTB(ch, ATA_FEATURE, ATA_F_DMA);
	    ATA_IDX_OUTB(ch, ATA_CYL_LSB, 0);
	    ATA_IDX_OUTB(ch, ATA_CYL_MSB, 0);
	}
	else {
	    ATA_IDX_OUTB(ch, ATA_FEATURE, 0);
	    ATA_IDX_OUTB(ch, ATA_CYL_LSB, request->transfersize);
	    ATA_IDX_OUTB(ch, ATA_CYL_MSB, request->transfersize >> 8);
	}
	ATA_IDX_OUTB(ch, ATA_COMMAND, ATA_PACKET_CMD);

	/* command interrupt device ? just return and wait for interrupt */
	if ((atadev->param.config & ATA_DRQ_MASK) == ATA_DRQ_INTR)
	    return 0;

	/* wait for ready to write ATAPI command block */
	while (timeout--) {
	    int reason = ATA_IDX_INB(ch, ATA_IREASON);
	    int status = ATA_IDX_INB(ch, ATA_STATUS);

	    if (((reason & (ATA_I_CMD | ATA_I_IN)) |
		 (status & (ATA_S_DRQ | ATA_S_BUSY))) == ATAPI_P_CMDOUT)
		break;
	    DELAY(20);
	}
	if (timeout <= 0) {
	    device_printf(request->dev, "timeout waiting for ATAPI ready\n");
	    request->result = EIO;
	    return -1;
	}

	/* this seems to be needed for some (slow) devices */
	DELAY(10);
		    
	/* output command block */
	ATA_IDX_OUTSW_STRM(ch, ATA_DATA, (int16_t *)request->u.atapi.ccb,
			   (atadev->param.config & ATA_PROTO_MASK) ==
			   ATA_PROTO_ATAPI_12 ? 6 : 8);
    }

static struct resource *
obio_alloc_resource(device_t bus, device_t child, int type, int *rid,
    rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
{
	struct obio_softc		*sc = device_get_softc(bus);
	struct obio_ivar		*ivar = device_get_ivars(child);
	struct resource			*rv;
	struct resource_list_entry	*rle;
	struct rman			*rm;
	int				 isdefault, needactivate, passthrough;

	isdefault = (RMAN_IS_DEFAULT_RANGE(start, end) && count == 1);
	needactivate = flags & RF_ACTIVE;
	passthrough = (device_get_parent(child) != bus);
	rle = NULL;

	if (passthrough)
		return (BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type,
		    rid, start, end, count, flags));

	/*
	 * If this is an allocation of the "default" range for a given RID,
	 * and we know what the resources for this device are (ie. they aren't
	 * maintained by a child bus), then work out the start/end values.
	 */
	if (isdefault) {
		rle = resource_list_find(&ivar->resources, type, *rid);
		if (rle == NULL)
			return (NULL);
		if (rle->res != NULL) {
			panic("%s: resource entry is busy", __func__);
		}
		start = rle->start;
		end = rle->end;
		count = rle->count;
	}

	switch (type) {
	case SYS_RES_IRQ:
		rm = &sc->oba_irq_rman;
		break;
	case SYS_RES_MEMORY:
		rm = &sc->oba_mem_rman;
		break;
	default:
		printf("%s: unknown resource type %d\n", __func__, type);
		return (0);
	}

	rv = rman_reserve_resource(rm, start, end, count, flags, child);
	if (rv == NULL) {
		printf("%s: could not reserve resource\n", __func__);
		return (0);
	}

	rman_set_rid(rv, *rid);

	if (needactivate) {
		if (bus_activate_resource(child, type, *rid, rv)) {
			printf("%s: could not activate resource\n", __func__);
			rman_release_resource(rv);
			return (0);
		}
	}

	return (rv);
}

/*
 * icoutput()
 */
static int
icoutput(struct ifnet *ifp, struct mbuf *m,
	struct sockaddr *dst, struct rtentry *rt)
{
	device_t icdev = devclass_get_device(ic_devclass, ifp->if_unit);
	device_t parent = device_get_parent(icdev);
	struct ic_softc *sc = (struct ic_softc *)device_get_softc(icdev);

	int s, len, sent;
	struct mbuf *mm;
	u_char *cp;
	u_int hdr = dst->sa_family;

	ifp->if_flags |= IFF_RUNNING;

	s = splhigh();

	/* already sending? */
	if (sc->ic_sending) {
		ifp->if_oerrors ++;
		goto error;
	}
		
	/* insert header */
	bcopy ((char *)&hdr, sc->ic_obuf, ICHDRLEN);

	cp = sc->ic_obuf + ICHDRLEN;
	len = 0;
	mm = m;
	do {
		if (len + mm->m_len > sc->ic_if.if_mtu) {
			/* packet to large */
			ifp->if_oerrors ++;
			goto error;
		}
			
		bcopy(mtod(mm,char *), cp, mm->m_len);
		cp += mm->m_len;
		len += mm->m_len;

	} while ((mm = mm->m_next));

#if NBPFILTER > 0
	if (ifp->if_bpf) {
		struct mbuf m0, *n = m;

		/*
		 * We need to prepend the address family as
		 * a four byte field.  Cons up a dummy header
		 * to pacify bpf.  This is safe because bpf
		 * will only read from the mbuf (i.e., it won't
		 * try to free it or keep a pointer a to it).
		 */
		m0.m_next = m;
		m0.m_len = sizeof(u_int);
		m0.m_data = (char *)&hdr;
		n = &m0;

		bpf_mtap(ifp, n);
	}
#endif

	sc->ic_sending = 1;

	m_freem(m);
	splx(s);

	/* send the packet */
	if (iicbus_block_write(parent, sc->ic_addr, sc->ic_obuf,
				len + ICHDRLEN, &sent))

		ifp->if_oerrors ++;
	else {
		ifp->if_opackets ++;
		ifp->if_obytes += len;
	}

	sc->ic_sending = 0;

	return (0);

error:
	m_freem(m);
	splx(s);

	return(0);
}

/*
 * iciotcl()
 */
static int
icioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
{
    device_t icdev = devclass_get_device(ic_devclass, ifp->if_unit);
    device_t parent = device_get_parent(icdev);
    struct ic_softc *sc = (struct ic_softc *)device_get_softc(icdev);

    struct ifaddr *ifa = (struct ifaddr *)data;
    struct ifreq *ifr = (struct ifreq *)data;

    u_char *iptr, *optr;
    int error;

    switch (cmd) {

    case SIOCSIFDSTADDR:
    case SIOCAIFADDR:
    case SIOCSIFADDR:
	if (ifa->ifa_addr->sa_family != AF_INET)
	    return EAFNOSUPPORT;
	ifp->if_flags |= IFF_UP;
	/* FALLTHROUGH */
    case SIOCSIFFLAGS:
	if ((!(ifp->if_flags & IFF_UP)) && (ifp->if_flags & IFF_RUNNING)) {

	    /* XXX disable PCF */
	    ifp->if_flags &= ~IFF_RUNNING;

	    /* IFF_UP is not set, try to release the bus anyway */
	    iicbus_release_bus(parent, icdev);
	    break;
	}
	if (((ifp->if_flags & IFF_UP)) && (!(ifp->if_flags & IFF_RUNNING))) {

	    if ((error = iicbus_request_bus(parent, icdev, IIC_WAIT|IIC_INTR)))
		return (error);

	    sc->ic_obuf = malloc(sc->ic_if.if_mtu + ICHDRLEN,
				  M_DEVBUF, M_WAITOK);
	    if (!sc->ic_obuf) {
		iicbus_release_bus(parent, icdev);
		return ENOBUFS;
	    }

	    sc->ic_ifbuf = malloc(sc->ic_if.if_mtu + ICHDRLEN,
				  M_DEVBUF, M_WAITOK);
	    if (!sc->ic_ifbuf) {
		iicbus_release_bus(parent, icdev);
		return ENOBUFS;
	    }

	    iicbus_reset(parent, IIC_FASTEST, 0, NULL);

	    ifp->if_flags |= IFF_RUNNING;
	}
	break;

    case SIOCSIFMTU:
	/* save previous buffers */
	iptr = sc->ic_ifbuf;
	optr = sc->ic_obuf;

	/* allocate input buffer */
	sc->ic_ifbuf = malloc(ifr->ifr_mtu+ICHDRLEN, M_DEVBUF, M_NOWAIT);
	if (!sc->ic_ifbuf) {

	    sc->ic_ifbuf = iptr;
	    sc->ic_obuf = optr;

	    return ENOBUFS;
	}

	/* allocate output buffer */
	sc->ic_ifbuf = malloc(ifr->ifr_mtu+ICHDRLEN, M_DEVBUF, M_NOWAIT);
	if (!sc->ic_obuf) {

	    free(sc->ic_ifbuf,M_DEVBUF);

	    sc->ic_ifbuf = iptr;
	    sc->ic_obuf = optr;

	    return ENOBUFS;
	}

	if (iptr)
	    free(iptr,M_DEVBUF);

	if (optr)
	    free(optr,M_DEVBUF);

	sc->ic_if.if_mtu = ifr->ifr_mtu;
	break;

    case SIOCGIFMTU:
	ifr->ifr_mtu = sc->ic_if.if_mtu;
	break;

//.........这里部分代码省略.........

void
nandbus_read_buffer(device_t dev, void *buf, uint32_t len)
{

	NFC_READ_BUF(device_get_parent(dev), buf, len);
}

/* must be called with ATA channel locked and state_mtx held */
int
ata_begin_transaction(struct ata_request *request)
{
    struct ata_channel *ch = device_get_softc(device_get_parent(request->dev));
    struct ata_device *atadev = device_get_softc(request->dev);
    int dummy, error;

    ATA_DEBUG_RQ(request, "begin transaction");

    /* disable ATAPI DMA writes if HW doesn't support it */
    if ((ch->flags & ATA_ATAPI_DMA_RO) &&
	((request->flags & (ATA_R_ATAPI | ATA_R_DMA | ATA_R_WRITE)) ==
	 (ATA_R_ATAPI | ATA_R_DMA | ATA_R_WRITE)))
	request->flags &= ~ATA_R_DMA;

    /* check for 48 bit access and convert if needed */
    ata_modify_if_48bit(request);

    switch (request->flags & (ATA_R_ATAPI | ATA_R_DMA)) {

    /* ATA PIO data transfer and control commands */
    default:
	{
	/* record command direction here as our request might be gone later */
	int write = (request->flags & ATA_R_WRITE);

	    /* issue command */
	    if (ch->hw.command(request)) {
		device_printf(request->dev, "error issuing %s command\n",
			   ata_cmd2str(request));
		request->result = EIO;
		goto begin_finished;
	    }

	    /* device reset doesn't interrupt */
	    if (request->u.ata.command == ATA_DEVICE_RESET) {

		int timeout = 1000000;
		do {
		    DELAY(10);
		    request->status = ATA_IDX_INB(ch, ATA_STATUS);
		} while (request->status & ATA_S_BUSY && timeout--);
		if (request->status & ATA_S_ERROR)
		    request->error = ATA_IDX_INB(ch, ATA_ERROR);
		goto begin_finished;
	    }

	    /* if write command output the data */
	    if (write) {
		if (ata_wait(ch, atadev, (ATA_S_READY | ATA_S_DRQ)) < 0) {
		    device_printf(request->dev,
				  "timeout waiting for write DRQ\n");
		    request->result = EIO;
		    goto begin_finished;
		}
		ata_pio_write(request, request->transfersize);
	    }
	}
	goto begin_continue;

    /* ATA DMA data transfer commands */
    case ATA_R_DMA:
	/* check sanity, setup SG list and DMA engine */
	if ((error = ch->dma->load(ch->dev, request->data, request->bytecount,
				   request->flags & ATA_R_READ, ch->dma->sg, 
				   &dummy))) {
	    device_printf(request->dev, "setting up DMA failed\n");
	    request->result = error;
	    goto begin_finished;
	}

	/* issue command */
	if (ch->hw.command(request)) {
	    device_printf(request->dev, "error issuing %s command\n",
		       ata_cmd2str(request));
	    request->result = EIO;
	    goto begin_finished;
	}

	/* start DMA engine */
	if (ch->dma->start && ch->dma->start(request->dev)) {
	    device_printf(request->dev, "error starting DMA\n");
	    request->result = EIO;
	    goto begin_finished;
	}
	goto begin_continue;

    /* ATAPI PIO commands */
    case ATA_R_ATAPI:
	/* is this just a POLL DSC command ? */
	if (request->u.atapi.ccb[0] == ATAPI_POLL_DSC) {
	    ATA_IDX_OUTB(ch, ATA_DRIVE, ATA_D_IBM | atadev->unit);
	    DELAY(10);
	    if (!(ATA_IDX_INB(ch, ATA_ALTSTAT) & ATA_S_DSC))
		request->result = EBUSY;
	    goto begin_finished;
	}

	/* start ATAPI operation */
//.........这里部分代码省略.........

void
nandbus_write_buffer(device_t dev, void *buf, uint32_t len)
{

	NFC_WRITE_BUF(device_get_parent(dev), buf, len);
}

/*
 * ppb_MS_microseq()
 *
 * Interprete a microsequence. Some microinstructions are executed at adapter
 * level to avoid function call overhead between ppbus and the adapter
 */
int
ppb_MS_microseq(device_t bus, device_t dev, struct ppb_microseq *msq, int *ret)
{
    struct ppb_data *ppb = (struct ppb_data *)device_get_softc(bus);
    struct ppb_device *ppbdev = (struct ppb_device *)device_get_ivars(dev);

    struct ppb_microseq *mi;		/* current microinstruction */
    int error;

    struct ppb_xfer *xfer;

    /* microsequence executed to initialize the transfer */
    struct ppb_microseq initxfer[] = {
        MS_PTR(MS_UNKNOWN), 	/* set ptr to buffer */
        MS_SET(MS_UNKNOWN),	/* set transfer size */
        MS_RET(0)
    };

    if (ppb->ppb_owner != dev)
        return (EACCES);

#define INCR_PC (mi ++)

    mi = msq;
    for (;;) {
        switch (mi->opcode) {
        case MS_OP_PUT:
        case MS_OP_GET:

            /* attempt to choose the best mode for the device */
            xfer = mode2xfer(bus, ppbdev, mi->opcode);

            /* figure out if we should use ieee1284 code */
            if (!xfer->loop) {
                if (mi->opcode == MS_OP_PUT) {
                    if ((error = PPBUS_WRITE(
                                     device_get_parent(bus),
                                     (char *)mi->arg[0].p,
                                     mi->arg[1].i, 0)))
                        goto error;

                    INCR_PC;
                    goto next;
                } else
                    panic("%s: IEEE1284 read not supported", __func__);
            }

            /* XXX should use ppb_MS_init_msq() */
            initxfer[0].arg[0].p = mi->arg[0].p;
            initxfer[1].arg[0].i = mi->arg[1].i;

            /* initialize transfer */
            ppb_MS_microseq(bus, dev, initxfer, &error);

            if (error)
                goto error;

            /* the xfer microsequence should not contain any
             * MS_OP_PUT or MS_OP_GET!
             */
            ppb_MS_microseq(bus, dev, xfer->loop, &error);

            if (error)
                goto error;

            INCR_PC;
            break;

        case MS_OP_RET:
            if (ret)
                *ret = mi->arg[0].i;	/* return code */
            return (0);
            break;

        default:
            /* executing microinstructions at ppc level is
             * faster. This is the default if the microinstr
             * is unknown here
             */
            if ((error = PPBUS_EXEC_MICROSEQ(
                             device_get_parent(bus), &mi)))
                goto error;
            break;
        }
next:
        continue;
    }
error:
    return (error);
}