C++ bus_release_resource函数代码示例

static int
lpc_fb_attach(device_t dev)
{
	struct lpc_fb_softc *sc = device_get_softc(dev);
	struct lpc_fb_dmamap_arg ctx;
	phandle_t node;
	int mode, rid, err = 0;

	sc->lf_dev = dev;
	mtx_init(&sc->lf_mtx, "lpcfb", "fb", MTX_DEF);

	rid = 0;
	sc->lf_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
	    RF_ACTIVE);
	if (!sc->lf_mem_res) {
		device_printf(dev, "cannot allocate memory window\n");
		return (ENXIO);
	}

	sc->lf_bst = rman_get_bustag(sc->lf_mem_res);
	sc->lf_bsh = rman_get_bushandle(sc->lf_mem_res);

	rid = 0;
	sc->lf_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
	    RF_ACTIVE);
	if (!sc->lf_irq_res) {
		device_printf(dev, "cannot allocate interrupt\n");
		bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->lf_mem_res);
		return (ENXIO);
	}

	if (bus_setup_intr(dev, sc->lf_irq_res, INTR_TYPE_MISC | INTR_MPSAFE,
	    NULL, lpc_fb_intr, sc, &sc->lf_intrhand))
	{
		bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->lf_mem_res);
		bus_release_resource(dev, SYS_RES_IRQ, 1, sc->lf_irq_res);
		device_printf(dev, "cannot setup interrupt handler\n");
		return (ENXIO);
	}

	node = ofw_bus_get_node(dev);

	err = lpc_fb_read_lcd_config(node, &sc->lf_lcd_config);
	if (err) {
		device_printf(dev, "cannot read LCD configuration\n");
		goto fail;
	}

	sc->lf_buffer_size = sc->lf_lcd_config.lc_xres * 
	    sc->lf_lcd_config.lc_yres *
	    (sc->lf_lcd_config.lc_bpp == 24 ? 3 : 2);

	device_printf(dev, "%dx%d LCD, %d bits per pixel, %dkHz pixel clock\n",
	    sc->lf_lcd_config.lc_xres, sc->lf_lcd_config.lc_yres,
	    sc->lf_lcd_config.lc_bpp, sc->lf_lcd_config.lc_pixelclock / 1000);

	err = bus_dma_tag_create(
	    bus_get_dma_tag(sc->lf_dev),
	    4, 0,			/* alignment, boundary */
	    BUS_SPACE_MAXADDR_32BIT,	/* lowaddr */
	    BUS_SPACE_MAXADDR,		/* highaddr */
	    NULL, NULL,			/* filter, filterarg */
	    sc->lf_buffer_size, 1,	/* maxsize, nsegments */
	    sc->lf_buffer_size, 0,	/* maxsegsize, flags */
	    NULL, NULL,			/* lockfunc, lockarg */
	    &sc->lf_dma_tag);

	err = bus_dmamem_alloc(sc->lf_dma_tag, (void **)&sc->lf_buffer,
	    0, &sc->lf_dma_map);
	if (err) {
		device_printf(dev, "cannot allocate framebuffer\n");
		goto fail;
	}

	err = bus_dmamap_load(sc->lf_dma_tag, sc->lf_dma_map, sc->lf_buffer,
	    sc->lf_buffer_size, lpc_fb_dmamap_cb, &ctx, BUS_DMA_NOWAIT);
	if (err) {
		device_printf(dev, "cannot load DMA map\n");
		goto fail;
	}

	switch (sc->lf_lcd_config.lc_bpp) {
	case 12:
		mode = LPC_CLKPWR_LCDCLK_CTRL_MODE_12;
		break;
	case 15:
		mode = LPC_CLKPWR_LCDCLK_CTRL_MODE_15;
		break;
	case 16:
		mode = LPC_CLKPWR_LCDCLK_CTRL_MODE_16;
		break;
	case 24:
		mode = LPC_CLKPWR_LCDCLK_CTRL_MODE_24;
		break;
	default:
		panic("unsupported bpp");
	}

	lpc_pwr_write(sc->lf_dev, LPC_CLKPWR_LCDCLK_CTRL,
	    LPC_CLKPWR_LCDCLK_CTRL_MODE(mode) |
//.........这里部分代码省略.........

//.........这里部分代码省略.........
            error = ENXIO;
            goto err;
        }
        DELAY(1);
    }

    protocol = (uint8_t)le32toh(bus_space_read_4(gdt->sc_dpmemt, gdt->sc_dpmemh,
                                                  GDT_MPR_IC + GDT_S_INFO));
    bus_space_write_1(gdt->sc_dpmemt, gdt->sc_dpmemh, GDT_MPR_IC + GDT_S_STATUS,
                      0);
    if (protocol != GDT_PROTOCOL_VERSION) {
        printf("unsupported protocol %d\n", protocol);
        error = ENXIO;
        goto err;
    }
    
    /* special commnd to controller BIOS */
    bus_space_write_4(gdt->sc_dpmemt, gdt->sc_dpmemh, GDT_MPR_IC + GDT_S_INFO,
                      htole32(0));
    bus_space_write_4(gdt->sc_dpmemt, gdt->sc_dpmemh,
                      GDT_MPR_IC + GDT_S_INFO + sizeof (u_int32_t), htole32(0));
    bus_space_write_4(gdt->sc_dpmemt, gdt->sc_dpmemh,
                      GDT_MPR_IC + GDT_S_INFO + 2 * sizeof (u_int32_t),
                      htole32(1));
    bus_space_write_4(gdt->sc_dpmemt, gdt->sc_dpmemh,
                      GDT_MPR_IC + GDT_S_INFO + 3 * sizeof (u_int32_t),
                      htole32(0));
    bus_space_write_1(gdt->sc_dpmemt, gdt->sc_dpmemh, GDT_MPR_IC + GDT_S_CMD_INDX,
                      0xfe);
    bus_space_write_1(gdt->sc_dpmemt, gdt->sc_dpmemh, GDT_MPR_LDOOR, 1);

    DELAY(20);
    retries = GDT_RETRIES;
    while (bus_space_read_1(gdt->sc_dpmemt, gdt->sc_dpmemh,
                            GDT_MPR_IC + GDT_S_STATUS) != 0xfe) {
        if (--retries == 0) {
            printf("initialization error\n");
            error = ENXIO;
            goto err;
        }
        DELAY(1);
    }

    bus_space_write_1(gdt->sc_dpmemt, gdt->sc_dpmemh, GDT_MPR_IC + GDT_S_STATUS,
                      0);

    gdt->sc_ic_all_size = GDT_MPR_SZ;
    
    gdt->sc_copy_cmd = gdt_mpr_copy_cmd;
    gdt->sc_get_status = gdt_mpr_get_status;
    gdt->sc_intr = gdt_mpr_intr;
    gdt->sc_release_event = gdt_mpr_release_event;
    gdt->sc_set_sema0 = gdt_mpr_set_sema0;
    gdt->sc_test_busy = gdt_mpr_test_busy;

    /* Allocate a dmatag representing the capabilities of this attachment */
    if (bus_dma_tag_create(/*parent*/bus_get_dma_tag(dev),
                           /*alignemnt*/1, /*boundary*/0,
                           /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
                           /*highaddr*/BUS_SPACE_MAXADDR,
                           /*filter*/NULL, /*filterarg*/NULL,
                           /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
                           /*nsegments*/GDT_MAXSG,
                           /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
			   /*flags*/0, /*lockfunc*/busdma_lock_mutex,
			   /*lockarg*/&Giant, &gdt->sc_parent_dmat) != 0) {
        error = ENXIO;
        goto err;
    }
    gdt->sc_init_level++;

    if (iir_init(gdt) != 0) {
        iir_free(gdt);
        error = ENXIO;
        goto err;
    }

    /* Register with the XPT */
    iir_attach(gdt);

    /* associate interrupt handler */
    if (bus_setup_intr( dev, irq, INTR_TYPE_CAM, 
                        NULL, iir_intr, gdt, &ih )) {
        device_printf(dev, "Unable to register interrupt handler\n");
        error = ENXIO;
        goto err;
    }

    gdt_pci_enable_intr(gdt);
    return (0);
    
err:
    if (irq)
        bus_release_resource( dev, SYS_RES_IRQ, 0, irq );
/*
    if (io)
        bus_release_resource( dev, SYS_RES_MEMORY, rid, io );
*/
    return (error);
}

static int
ebus_pci_attach(device_t dev)
{
	struct ebus_softc *sc;
	struct ebus_rinfo *eri;
	struct resource *res;
	struct isa_ranges *range;
	phandle_t node;
	int i, rnum, rid;

	sc = device_get_softc(dev);
	sc->sc_flags |= EBUS_PCI;

	pci_write_config(dev, PCIR_COMMAND,
	    pci_read_config(dev, PCIR_COMMAND, 2) | PCIM_CMD_SERRESPEN |
	    PCIM_CMD_PERRESPEN | PCIM_CMD_BUSMASTEREN | PCIM_CMD_MEMEN, 2);
	pci_write_config(dev, PCIR_CACHELNSZ, 16 /* 64 bytes */, 1);
	pci_write_config(dev, PCIR_LATTIMER, 64 /* 64 PCI cycles */, 1);

	node = ofw_bus_get_node(dev);
	sc->sc_nrange = OF_getprop_alloc(node, "ranges",
	    sizeof(struct isa_ranges), &sc->sc_range);
	if (sc->sc_nrange == -1) {
		device_printf(dev, "could not get ranges property\n");
		return (ENXIO);
	}

	sc->sc_rinfo = malloc(sizeof(*sc->sc_rinfo) * sc->sc_nrange, M_DEVBUF,
	    M_WAITOK | M_ZERO);

	/* For every range, there must be a matching resource. */
	for (rnum = 0; rnum < sc->sc_nrange; rnum++) {
		eri = &sc->sc_rinfo[rnum];
		range = &((struct isa_ranges *)sc->sc_range)[rnum];
		eri->eri_rtype = ofw_isa_range_restype(range);
		rid = PCIR_BAR(rnum);
		res = bus_alloc_resource_any(dev, eri->eri_rtype, &rid,
		    RF_ACTIVE);
		if (res == NULL) {
			device_printf(dev,
			    "could not allocate range resource %d\n", rnum);
			goto fail;
		}
		if (rman_get_start(res) != ISA_RANGE_PHYS(range)) {
			device_printf(dev,
			    "mismatch in start of range %d (0x%lx/0x%lx)\n",
			    rnum, rman_get_start(res), ISA_RANGE_PHYS(range));
			goto fail;
		}
		if (rman_get_size(res) != range->size) {
			device_printf(dev,
			    "mismatch in size of range %d (0x%lx/0x%x)\n",
			    rnum, rman_get_size(res), range->size);
			goto fail;
		}
		eri->eri_res = res;
		eri->eri_rman.rm_type = RMAN_ARRAY;
		eri->eri_rman.rm_descr = "EBus range";
		if (rman_init_from_resource(&eri->eri_rman, res) != 0) {
			device_printf(dev,
			    "could not initialize rman for range %d", rnum);
			goto fail;
		}
	}
	return (ebus_attach(dev, sc, node));

 fail:
	for (i = rnum; i >= 0; i--) {
		eri = &sc->sc_rinfo[i];
		if (i < rnum)
			rman_fini(&eri->eri_rman);
		if (eri->eri_res != NULL) {
			bus_release_resource(dev, eri->eri_rtype,
			    PCIR_BAR(rnum), eri->eri_res);
		}
	}
	free(sc->sc_rinfo, M_DEVBUF);
	free(sc->sc_range, M_OFWPROP);
	return (ENXIO);
}

//.........这里部分代码省略.........
	device_printf(dev, "chip is in D%d power mode "
		      "-- setting to D0\n", pci_get_powerstate(dev));

	pci_set_powerstate(dev, PCI_POWERSTATE_D0);
    }
#endif
    sc->regid   = PCIR_MAPS;
    sc->regtype = SYS_RES_MEMORY;
    sc->reg = bus_alloc_resource(dev, sc->regtype, &sc->regid,
				 0, ~0, CS4281PCI_BA0_SIZE, RF_ACTIVE);
    if (!sc->reg) {
	sc->regtype = SYS_RES_IOPORT;
	sc->reg = bus_alloc_resource(dev, sc->regtype, &sc->regid,
				     0, ~0, CS4281PCI_BA0_SIZE, RF_ACTIVE);
	if (!sc->reg) {
	    device_printf(dev, "unable to allocate register space\n");
	    goto bad;
	}
    }
    sc->st = rman_get_bustag(sc->reg);
    sc->sh = rman_get_bushandle(sc->reg);

    sc->memid = PCIR_MAPS + 4;
    sc->mem = bus_alloc_resource(dev, SYS_RES_MEMORY, &sc->memid, 0,
				 ~0, CS4281PCI_BA1_SIZE, RF_ACTIVE);
    if (sc->mem == NULL) {
	device_printf(dev, "unable to allocate fifo space\n");
	goto bad;
    }

    sc->irqid = 0;
    sc->irq = bus_alloc_resource(dev, SYS_RES_IRQ, &sc->irqid,
				 0, ~0, 1, RF_ACTIVE | RF_SHAREABLE);
    if (!sc->irq) {
	device_printf(dev, "unable to allocate interrupt\n");
	goto bad;
    }

    if (bus_setup_intr(dev, sc->irq, INTR_TYPE_TTY, cs4281_intr, sc, &sc->ih)) {
	device_printf(dev, "unable to setup interrupt\n");
	goto bad;
    }

    if (bus_dma_tag_create(/*parent*/NULL, /*alignment*/2, /*boundary*/0,
			   /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
			   /*highaddr*/BUS_SPACE_MAXADDR,
			   /*filter*/NULL, /*filterarg*/NULL,
			   /*maxsize*/CS4281_BUFFER_SIZE, /*nsegments*/1,
			   /*maxsegz*/0x3ffff,
			   /*flags*/0, &sc->parent_dmat) != 0) {
	device_printf(dev, "unable to create dma tag\n");
	goto bad;
    }

    /* power up */
    cs4281_power(sc, 0);

    /* init chip */
    if (cs4281_init(sc) == -1) {
	device_printf(dev, "unable to initialize the card\n");
	goto bad;
    }

    /* create/init mixer */
    codec = AC97_CREATE(dev, sc, cs4281_ac97);
    if (codec == NULL)
        goto bad;

    mixer_init(dev, ac97_getmixerclass(), codec);

    if (pcm_register(dev, sc, 1, 1))
	goto bad;

    pcm_addchan(dev, PCMDIR_PLAY, &cs4281chan_class, sc);
    pcm_addchan(dev, PCMDIR_REC, &cs4281chan_class, sc);

    snprintf(status, SND_STATUSLEN, "at %s 0x%lx irq %ld",
	     (sc->regtype == SYS_RES_IOPORT)? "io" : "memory",
	     rman_get_start(sc->reg), rman_get_start(sc->irq));
    pcm_setstatus(dev, status);

    return 0;

 bad:
    if (codec)
	ac97_destroy(codec);
    if (sc->reg)
	bus_release_resource(dev, sc->regtype, sc->regid, sc->reg);
    if (sc->mem)
	bus_release_resource(dev, SYS_RES_MEMORY, sc->memid, sc->mem);
    if (sc->ih)
	bus_teardown_intr(dev, sc->irq, sc->ih);
    if (sc->irq)
	bus_release_resource(dev, SYS_RES_IRQ, sc->irqid, sc->irq);
    if (sc->parent_dmat)
	bus_dma_tag_destroy(sc->parent_dmat);
    free(sc, M_DEVBUF);

    return ENXIO;
}

static int
csa_attach(device_t dev)
{
	u_int32_t stcmd;
	sc_p scp;
	csa_res *resp;
	struct sndcard_func *func;
	int error = ENXIO;

	scp = device_get_softc(dev);

	/* Fill in the softc. */
	bzero(scp, sizeof(*scp));
	scp->dev = dev;

	/* Wake up the device. */
	stcmd = pci_read_config(dev, PCIR_COMMAND, 2);
	if ((stcmd & PCIM_CMD_MEMEN) == 0 || (stcmd & PCIM_CMD_BUSMASTEREN) == 0) {
		stcmd |= (PCIM_CMD_MEMEN | PCIM_CMD_BUSMASTEREN);
		pci_write_config(dev, PCIR_COMMAND, stcmd, 2);
	}

	/* Allocate the resources. */
	resp = &scp->res;
	scp->card = csa_findsubcard(dev);
	scp->binfo.card = scp->card;
	printf("csa: card is %s\n", scp->card->name);
	resp->io_rid = PCIR_BAR(0);
	resp->io = bus_alloc_resource_any(dev, SYS_RES_MEMORY, 
		&resp->io_rid, RF_ACTIVE);
	if (resp->io == NULL)
		return (ENXIO);
	resp->mem_rid = PCIR_BAR(1);
	resp->mem = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
		&resp->mem_rid, RF_ACTIVE);
	if (resp->mem == NULL)
		goto err_io;
	resp->irq_rid = 0;
	resp->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ,
		&resp->irq_rid, RF_ACTIVE | RF_SHAREABLE);
	if (resp->irq == NULL)
		goto err_mem;

	/* Enable interrupt. */
	if (snd_setup_intr(dev, resp->irq, 0, csa_intr, scp, &scp->ih))
		goto err_intr;
#if 0
	if ((csa_readio(resp, BA0_HISR) & HISR_INTENA) == 0)
		csa_writeio(resp, BA0_HICR, HICR_IEV | HICR_CHGM);
#endif

	/* Initialize the chip. */
	if (csa_initialize(scp))
		goto err_teardown;

	/* Reset the Processor. */
	csa_resetdsp(resp);

	/* Download the Processor Image to the processor. */
	if (csa_downloadimage(resp))
		goto err_teardown;

	/* Attach the children. */

	/* PCM Audio */
	func = malloc(sizeof(struct sndcard_func), M_DEVBUF, M_NOWAIT | M_ZERO);
	if (func == NULL) {
		error = ENOMEM;
		goto err_teardown;
	}
	func->varinfo = &scp->binfo;
	func->func = SCF_PCM;
	scp->pcm = device_add_child(dev, "pcm", -1);
	device_set_ivars(scp->pcm, func);

	/* Midi Interface */
	func = malloc(sizeof(struct sndcard_func), M_DEVBUF, M_NOWAIT | M_ZERO);
	if (func == NULL) {
		error = ENOMEM;
		goto err_teardown;
	}
	func->varinfo = &scp->binfo;
	func->func = SCF_MIDI;
	scp->midi = device_add_child(dev, "midi", -1);
	device_set_ivars(scp->midi, func);

	bus_generic_attach(dev);

	return (0);

err_teardown:
	bus_teardown_intr(dev, resp->irq, scp->ih);
err_intr:
	bus_release_resource(dev, SYS_RES_IRQ, resp->irq_rid, resp->irq);
err_mem:
	bus_release_resource(dev, SYS_RES_MEMORY, resp->mem_rid, resp->mem);
err_io:
	bus_release_resource(dev, SYS_RES_MEMORY, resp->io_rid, resp->io);
	return (error);
}

int
ata_attach(device_t dev)
{
    struct ata_channel *ch = device_get_softc(dev);
    int error, rid;
    struct cam_devq *devq;
    const char *res;
    char buf[64];
    int i, mode;

    /* check that we have a virgin channel to attach */
    if (ch->r_irq)
	return EEXIST;

    /* initialize the softc basics */
    ch->dev = dev;
    ch->state = ATA_IDLE;
    bzero(&ch->state_mtx, sizeof(struct mtx));
    mtx_init(&ch->state_mtx, "ATA state lock", NULL, MTX_DEF);
    TASK_INIT(&ch->conntask, 0, ata_conn_event, dev);
	for (i = 0; i < 16; i++) {
		ch->user[i].revision = 0;
		snprintf(buf, sizeof(buf), "dev%d.sata_rev", i);
		if (resource_int_value(device_get_name(dev),
		    device_get_unit(dev), buf, &mode) != 0 &&
		    resource_int_value(device_get_name(dev),
		    device_get_unit(dev), "sata_rev", &mode) != 0)
			mode = -1;
		if (mode >= 0)
			ch->user[i].revision = mode;
		ch->user[i].mode = 0;
		snprintf(buf, sizeof(buf), "dev%d.mode", i);
		if (resource_string_value(device_get_name(dev),
		    device_get_unit(dev), buf, &res) == 0)
			mode = ata_str2mode(res);
		else if (resource_string_value(device_get_name(dev),
		    device_get_unit(dev), "mode", &res) == 0)
			mode = ata_str2mode(res);
		else
			mode = -1;
		if (mode >= 0)
			ch->user[i].mode = mode;
		if (ch->flags & ATA_SATA)
			ch->user[i].bytecount = 8192;
		else
			ch->user[i].bytecount = MAXPHYS;
		ch->user[i].caps = 0;
		ch->curr[i] = ch->user[i];
		if (ch->flags & ATA_SATA) {
			if (ch->pm_level > 0)
				ch->user[i].caps |= CTS_SATA_CAPS_H_PMREQ;
			if (ch->pm_level > 1)
				ch->user[i].caps |= CTS_SATA_CAPS_D_PMREQ;
		} else {
			if (!(ch->flags & ATA_NO_48BIT_DMA))
				ch->user[i].caps |= CTS_ATA_CAPS_H_DMA48;
		}
	}
	callout_init(&ch->poll_callout, 1);

    /* allocate DMA resources if DMA HW present*/
    if (ch->dma.alloc)
	ch->dma.alloc(dev);

    /* setup interrupt delivery */
    rid = ATA_IRQ_RID;
    ch->r_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
				       RF_SHAREABLE | RF_ACTIVE);
    if (!ch->r_irq) {
	device_printf(dev, "unable to allocate interrupt\n");
	return ENXIO;
    }
    if ((error = bus_setup_intr(dev, ch->r_irq, ATA_INTR_FLAGS, NULL,
				ata_interrupt, ch, &ch->ih))) {
	bus_release_resource(dev, SYS_RES_IRQ, rid, ch->r_irq);
	device_printf(dev, "unable to setup interrupt\n");
	return error;
    }

	if (ch->flags & ATA_PERIODIC_POLL)
		callout_reset(&ch->poll_callout, hz, ata_periodic_poll, ch);
	mtx_lock(&ch->state_mtx);
	/* Create the device queue for our SIM. */
	devq = cam_simq_alloc(1);
	if (devq == NULL) {
		device_printf(dev, "Unable to allocate simq\n");
		error = ENOMEM;
		goto err1;
	}
	/* Construct SIM entry */
	ch->sim = cam_sim_alloc(ataaction, atapoll, "ata", ch,
	    device_get_unit(dev), &ch->state_mtx, 1, 0, devq);
	if (ch->sim == NULL) {
		device_printf(dev, "unable to allocate sim\n");
		cam_simq_free(devq);
		error = ENOMEM;
		goto err1;
	}
	if (xpt_bus_register(ch->sim, dev, 0) != CAM_SUCCESS) {
		device_printf(dev, "unable to register xpt bus\n");
//.........这里部分代码省略.........

/*
 * The adv_b stuff to handle twin-channel cards will not work in its current
 * incarnation.  It tries to reuse the same softc since adv_alloc() doesn't
 * actually allocate a softc.  It also tries to reuse the same unit number
 * for both sims.  This can be re-enabled if someone fixes it properly.
 */
static int
adv_eisa_attach(device_t dev)
{
	struct adv_softc *adv;
#if 0
	struct adv_softc *adv_b;
#endif
	struct resource *io;
	struct resource *irq;
	int rid, error;
	void *ih;

#if 0
	adv_b = NULL;
#endif

	rid = 0;
	io = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, RF_ACTIVE);
	if (!io) {
		device_printf(dev, "No I/O space?!\n");
		return ENOMEM;
	}

	rid = 0;
	irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
				     RF_SHAREABLE | RF_ACTIVE);
	if (!irq) {
		device_printf(dev, "No irq?!\n");
		bus_release_resource(dev, SYS_RES_IOPORT, 0, io);
		return ENOMEM;

	}

	switch (eisa_get_id(dev) & ~0xF) {
	case EISA_DEVICE_ID_ADVANSYS_750:
#if 0
		adv_b = adv_alloc(dev, io, ADV_EISA_OFFSET_CHAN2);
		if (adv_b == NULL)
			goto bad;
		
		/*
		 * Allocate a parent dmatag for all tags created
		 * by the MI portions of the advansys driver
		 */
		error = bus_dma_tag_create(
				/* parent	*/ bus_get_dma_tag(dev),
				/* alignment	*/ 1,
				/* boundary	*/ 0,
				/* lowaddr	*/ ADV_EISA_MAX_DMA_ADDR,
				/* highaddr	*/ BUS_SPACE_MAXADDR,
				/* filter	*/ NULL,
				/* filterarg	*/ NULL,
				/* maxsize	*/ BUS_SPACE_MAXSIZE_32BIT,
				/* nsegments	*/ ~0,
				/* maxsegsz	*/ ADV_EISA_MAX_DMA_COUNT,
				/* flags	*/ 0,
				/* lockfunc	*/ NULL,
				/* lockarg	*/ NULL,
				&adv_b->parent_dmat);
 
		if (error != 0) {
			device_printf(dev, "Could not allocate DMA tag - error %d\n",
			       error);
			adv_free(adv_b);
			goto bad;
		}

		adv_b->init_level++;
#endif

		/* FALLTHROUGH */
	case EISA_DEVICE_ID_ADVANSYS_740:
		adv = adv_alloc(dev, io, ADV_EISA_OFFSET_CHAN1);
		if (adv == NULL) {
#if 0
			if (adv_b != NULL)
				adv_free(adv_b);
#endif
			goto bad;
		}

		/*
		 * Allocate a parent dmatag for all tags created
		 * by the MI portions of the advansys driver
		 */
		error = bus_dma_tag_create(
				/* parent	*/ bus_get_dma_tag(dev),
				/* alignment	*/ 1,
				/* boundary	*/ 0,
				/* lowaddr	*/ ADV_EISA_MAX_DMA_ADDR,
				/* highaddr	*/ BUS_SPACE_MAXADDR,
				/* filter	*/ NULL,
				/* filterarg	*/ NULL,
				/* maxsize	*/ BUS_SPACE_MAXSIZE_32BIT,
//.........这里部分代码省略.........

int
smc_probe(device_t dev)
{
	int			rid, type, error;
	uint16_t		val;
	struct smc_softc	*sc;
	struct resource		*reg;

	sc = device_get_softc(dev);
	rid = 0;
	type = SYS_RES_IOPORT;
	error = 0;

	if (sc->smc_usemem)
		type = SYS_RES_MEMORY;

	reg = bus_alloc_resource(dev, type, &rid, 0, ~0, 16, RF_ACTIVE);
	if (reg == NULL) {
		if (bootverbose)
			device_printf(dev,
			    "could not allocate I/O resource for probe\n");
		return (ENXIO);
	}

	/* Check for the identification value in the BSR. */
	val = bus_read_2(reg, BSR);
	if ((val & BSR_IDENTIFY_MASK) != BSR_IDENTIFY) {
		if (bootverbose)
			device_printf(dev, "identification value not in BSR\n");
		error = ENXIO;
		goto done;
	}

	/*
	 * Try switching banks and make sure we still get the identification
	 * value.
	 */
	bus_write_2(reg, BSR, 0);
	val = bus_read_2(reg, BSR);
	if ((val & BSR_IDENTIFY_MASK) != BSR_IDENTIFY) {
		if (bootverbose)
			device_printf(dev,
			    "identification value not in BSR after write\n");
		error = ENXIO;
		goto done;
	}

#if 0
	/* Check the BAR. */
	bus_write_2(reg, BSR, 1);
	val = bus_read_2(reg, BAR);
	val = BAR_ADDRESS(val);
	if (rman_get_start(reg) != val) {
		if (bootverbose)
			device_printf(dev, "BAR address %x does not match "
			    "I/O resource address %lx\n", val,
			    rman_get_start(reg));
		error = ENXIO;
		goto done;
	}
#endif

	/* Compare REV against known chip revisions. */
	bus_write_2(reg, BSR, 3);
	val = bus_read_2(reg, REV);
	val = (val & REV_CHIP_MASK) >> REV_CHIP_SHIFT;
	if (smc_chip_ids[val] == NULL) {
		if (bootverbose)
			device_printf(dev, "Unknown chip revision: %d\n", val);
		error = ENXIO;
		goto done;
	}

	device_set_desc(dev, smc_chip_ids[val]);

done:
	bus_release_resource(dev, type, rid, reg);
	return (error);
}

int
smc_detach(device_t dev)
{
	int			type;
	struct smc_softc	*sc;

	sc = device_get_softc(dev);
	SMC_LOCK(sc);
	smc_stop(sc);
	SMC_UNLOCK(sc);

	if (sc->smc_ifp != NULL) {
		ether_ifdetach(sc->smc_ifp);
	}
	
	callout_drain(&sc->smc_watchdog);
	callout_drain(&sc->smc_mii_tick_ch);
	
#ifdef DEVICE_POLLING
	if (sc->smc_ifp->if_capenable & IFCAP_POLLING)
		ether_poll_deregister(sc->smc_ifp);
#endif

	if (sc->smc_ih != NULL)
		bus_teardown_intr(sc->smc_dev, sc->smc_irq, sc->smc_ih);

	if (sc->smc_tq != NULL) {
		taskqueue_drain(sc->smc_tq, &sc->smc_intr);
		taskqueue_drain(sc->smc_tq, &sc->smc_rx);
		taskqueue_drain(sc->smc_tq, &sc->smc_tx);
		taskqueue_free(sc->smc_tq);
		sc->smc_tq = NULL;
	}

	if (sc->smc_ifp != NULL) {
		if_free(sc->smc_ifp);
	}

	if (sc->smc_miibus != NULL) {
		device_delete_child(sc->smc_dev, sc->smc_miibus);
		bus_generic_detach(sc->smc_dev);
	}

	if (sc->smc_reg != NULL) {
		type = SYS_RES_IOPORT;
		if (sc->smc_usemem)
			type = SYS_RES_MEMORY;

		bus_release_resource(sc->smc_dev, type, sc->smc_reg_rid,
		    sc->smc_reg);
	}

	if (sc->smc_irq != NULL)
		bus_release_resource(sc->smc_dev, SYS_RES_IRQ, sc->smc_irq_rid,
		   sc->smc_irq);

	if (mtx_initialized(&sc->smc_mtx))
		mtx_destroy(&sc->smc_mtx);

	return (0);
}

static int
si_pci_attach(device_t dev)
{
	struct si_softc *sc;
	void *ih;
	int error;

	error = 0;
	ih = NULL;
	sc = device_get_softc(dev);

	switch (pci_get_devid(dev)) {
	case 0x400011cb:
		sc->sc_type = SIPCI;
		sc->sc_mem_rid = SIPCIBADR;
		break;
	case 0x200011cb:
		sc->sc_type = SIJETPCI;
		sc->sc_mem_rid = SIJETBADR;
		break;
	}

	sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
						&sc->sc_mem_rid,
						RF_ACTIVE);
	if (!sc->sc_mem_res) {
		device_printf(dev, "couldn't map memory\n");
		goto fail;
	}
	sc->sc_paddr = (caddr_t)rman_get_start(sc->sc_mem_res);
	sc->sc_maddr = rman_get_virtual(sc->sc_mem_res);

	sc->sc_irq_rid = 0;
	sc->sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ,
						&sc->sc_irq_rid,
						RF_ACTIVE | RF_SHAREABLE);
	if (!sc->sc_irq_res) {
		device_printf(dev, "couldn't map interrupt\n");
		goto fail;
	}
	sc->sc_irq = rman_get_start(sc->sc_irq_res);
	error = bus_setup_intr(dev, sc->sc_irq_res, INTR_TYPE_TTY,
			       NULL, si_intr, sc, &ih);
	if (error) {
		device_printf(dev, "could not activate interrupt\n");
		goto fail;
	}

	if (pci_get_devid(dev) == 0x200011cb) {
		int rid;
		struct resource *plx_res;
		uint32_t *addr;
		uint32_t oldvalue;

		/* Perform a PLX control register fixup */
		rid = PCIR_BAR(0);
		plx_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
		    RF_ACTIVE);
		if (plx_res == NULL) {
			device_printf(dev, "couldn't map plx registers\n");
		} else {
			addr = rman_get_virtual(plx_res);
			oldvalue = addr[0x50 / 4];
			if (oldvalue != 0x18260000) {
				device_printf(dev, "PLX register 0x50: 0x%08x changed to 0x%08x\n", oldvalue, 0x18260000);
				addr[0x50 / 4] = 0x18260000;
			}
			bus_release_resource(dev, SYS_RES_MEMORY, rid, plx_res);
		}
	}

	error = siattach(dev);
	if (error)
		goto fail;
	return (0);		/* success */

fail:
	if (error == 0)
		error = ENXIO;
	if (sc->sc_irq_res) {
		if (ih)
			bus_teardown_intr(dev, sc->sc_irq_res, ih);
		bus_release_resource(dev, SYS_RES_IRQ,
				     sc->sc_irq_rid, sc->sc_irq_res);
		sc->sc_irq_res = 0;
	}
	if (sc->sc_mem_res) {
		bus_release_resource(dev, SYS_RES_MEMORY,
				     sc->sc_mem_rid, sc->sc_mem_res);
		sc->sc_mem_res = 0;
	}
	return (error);
}

int
ahc_pci_map_registers(struct ahc_softc *ahc)
{
	struct	resource *regs;
	u_int	command;
	int	regs_type;
	int	regs_id;
	int	allow_memio;

	command = aic_pci_read_config(ahc->dev_softc, PCIR_COMMAND, /*bytes*/1);
	regs = NULL;
	regs_type = 0;
	regs_id = 0;

	/* Retrieve the per-device 'allow_memio' hint */
	if (resource_int_value(device_get_name(ahc->dev_softc),
			       device_get_unit(ahc->dev_softc),
			       "allow_memio", &allow_memio) != 0) {
		if (bootverbose)
			device_printf(ahc->dev_softc, "Defaulting to MEMIO ");
#ifdef AHC_ALLOW_MEMIO
		if (bootverbose)
			printf("on\n");
		allow_memio = 1;
#else
		if (bootverbose)
			printf("off\n");
		allow_memio = 0;
#endif
	}

	if ((allow_memio != 0) && (command & PCIM_CMD_MEMEN) != 0) {

		regs_type = SYS_RES_MEMORY;
		regs_id = AHC_PCI_MEMADDR;
		regs = bus_alloc_resource_any(ahc->dev_softc, regs_type,
					      &regs_id, RF_ACTIVE);
		if (regs != NULL) {
			ahc->tag = rman_get_bustag(regs);
			ahc->bsh = rman_get_bushandle(regs);

			/*
			 * Do a quick test to see if memory mapped
			 * I/O is functioning correctly.
			 */
			if (ahc_pci_test_register_access(ahc) != 0) {
				device_printf(ahc->dev_softc,
				       "PCI Device %d:%d:%d failed memory "
				       "mapped test.  Using PIO.\n",
				       aic_get_pci_bus(ahc->dev_softc),
				       aic_get_pci_slot(ahc->dev_softc),
				       aic_get_pci_function(ahc->dev_softc));
				bus_release_resource(ahc->dev_softc, regs_type,
						     regs_id, regs);
				regs = NULL;
			} else {
				command &= ~PCIM_CMD_PORTEN;
				aic_pci_write_config(ahc->dev_softc,
						     PCIR_COMMAND,
						     command, /*bytes*/1);
			}
		}
	}

	if (regs == NULL && (command & PCIM_CMD_PORTEN) != 0) {
		regs_type = SYS_RES_IOPORT;
		regs_id = AHC_PCI_IOADDR;
		regs = bus_alloc_resource_any(ahc->dev_softc, regs_type,
					      &regs_id, RF_ACTIVE);
		if (regs != NULL) {
			ahc->tag = rman_get_bustag(regs);
			ahc->bsh = rman_get_bushandle(regs);
			if (ahc_pci_test_register_access(ahc) != 0) {
				device_printf(ahc->dev_softc,
				       "PCI Device %d:%d:%d failed I/O "
				       "mapped test.\n",
				       aic_get_pci_bus(ahc->dev_softc),
				       aic_get_pci_slot(ahc->dev_softc),
				       aic_get_pci_function(ahc->dev_softc));
				bus_release_resource(ahc->dev_softc, regs_type,
						     regs_id, regs);
				regs = NULL;
			} else {
				command &= ~PCIM_CMD_MEMEN;
				aic_pci_write_config(ahc->dev_softc,
						     PCIR_COMMAND,
						     command, /*bytes*/1);
			}
		}
	}
	if (regs == NULL) {
		device_printf(ahc->dev_softc,
			      "can't allocate register resources\n");
		return (ENOMEM);
	}
	ahc->platform_data->regs_res_type = regs_type;
	ahc->platform_data->regs_res_id = regs_id;
	ahc->platform_data->regs = regs;
	return (0);
}

//.........这里部分代码省略.........
	 */
	error = bus_dma_tag_create(
	    lesc->sc_pdmat,		/* parent */
	    8, 0,			/* alignment, boundary */
	    BUS_SPACE_MAXADDR_24BIT,	/* lowaddr */
	    BUS_SPACE_MAXADDR,		/* highaddr */
	    NULL, NULL,			/* filter, filterarg */
	    sc->sc_memsize,		/* maxsize */
	    1,				/* nsegments */
	    sc->sc_memsize,		/* maxsegsize */
	    0,				/* flags */
	    NULL, NULL,			/* lockfunc, lockarg */
	    &lesc->sc_dmat);
	if (error != 0) {
		device_printf(dev, "cannot allocate buffer DMA tag\n");
		goto fail_pdtag;
	}

	error = bus_dmamem_alloc(lesc->sc_dmat, (void **)&sc->sc_mem,
	    BUS_DMA_WAITOK | BUS_DMA_COHERENT, &lesc->sc_dmam);
	if (error != 0) {
		device_printf(dev, "cannot allocate DMA buffer memory\n");
		goto fail_dtag;
	}

	sc->sc_addr = 0;
	error = bus_dmamap_load(lesc->sc_dmat, lesc->sc_dmam, sc->sc_mem,
	    sc->sc_memsize, le_isa_dma_callback, sc, 0);
	if (error != 0 || sc->sc_addr == 0) {
		device_printf(dev, "cannot load DMA buffer map\n");
		goto fail_dmem;
	}

	isa_dmacascade(rman_get_start(lesc->sc_dres));

	sc->sc_flags = 0;
	sc->sc_conf3 = 0;

	/*
	 * Extract the physical MAC address from the ROM.
	 */
	for (i = 0; i < sizeof(sc->sc_enaddr); i++)
		sc->sc_enaddr[i] = bus_read_1(lesc->sc_rres,
		    macstart + i * macstride);

	sc->sc_copytodesc = lance_copytobuf_contig;
	sc->sc_copyfromdesc = lance_copyfrombuf_contig;
	sc->sc_copytobuf = lance_copytobuf_contig;
	sc->sc_copyfrombuf = lance_copyfrombuf_contig;
	sc->sc_zerobuf = lance_zerobuf_contig;

	sc->sc_rdcsr = le_isa_rdcsr;
	sc->sc_wrcsr = le_isa_wrcsr;
	sc->sc_hwreset = NULL;
	sc->sc_hwinit = NULL;
	sc->sc_hwintr = NULL;
	sc->sc_nocarrier = NULL;
	sc->sc_mediachange = NULL;
	sc->sc_mediastatus = NULL;
	sc->sc_supmedia = NULL;

	error = am7990_config(&lesc->sc_am7990, device_get_name(dev),
	    device_get_unit(dev));
	if (error != 0) {
		device_printf(dev, "cannot attach Am7990\n");
		goto fail_dmap;
	}

	error = bus_setup_intr(dev, lesc->sc_ires, INTR_TYPE_NET | INTR_MPSAFE,
	    NULL, am7990_intr, sc, &lesc->sc_ih);
	if (error != 0) {
		device_printf(dev, "cannot set up interrupt\n");
		goto fail_am7990;
	}

	return (0);

 fail_am7990:
	am7990_detach(&lesc->sc_am7990);
 fail_dmap:
	bus_dmamap_unload(lesc->sc_dmat, lesc->sc_dmam);
 fail_dmem:
	bus_dmamem_free(lesc->sc_dmat, sc->sc_mem, lesc->sc_dmam);
 fail_dtag:
	bus_dma_tag_destroy(lesc->sc_dmat);
 fail_pdtag:
	bus_dma_tag_destroy(lesc->sc_pdmat);
 fail_ires:
	bus_release_resource(dev, SYS_RES_IRQ,
	    rman_get_rid(lesc->sc_ires), lesc->sc_ires);
 fail_dres:
	bus_release_resource(dev, SYS_RES_DRQ,
	    rman_get_rid(lesc->sc_dres), lesc->sc_dres);
 fail_rres:
	bus_release_resource(dev, SYS_RES_IOPORT,
	    rman_get_rid(lesc->sc_rres), lesc->sc_rres);
 fail_mtx:
	LE_LOCK_DESTROY(sc);
	return (error);
}

static int
atkbdc_ebus_probe(device_t dev)
{
	struct resource *port0, *port1;
	u_long count, start;
	int error, rid;

	if (strcmp(ofw_bus_get_name(dev), "8042") != 0)
		return (ENXIO);

	/*
	 * On AXi and AXmp boards the NS16550 (used to connect keyboard/
	 * mouse) share their IRQ lines with the i8042. Any IRQ activity
	 * (typically during attach) of the NS16550 used to connect the
	 * keyboard when actually the PS/2 keyboard is selected in OFW
	 * causes interaction with the OBP i8042 driver resulting in a
	 * hang and vice versa. As RS232 keyboards and mice obviously
	 * aren't meant to be used in parallel with PS/2 ones on these
	 * boards don't attach to the i8042 in case the PS/2 keyboard
	 * isn't selected in order to prevent such hangs.
	 * Note that it's not sufficient here to rely on the '8042' node
	 * only showing up when a PS/2 keyboard is actually connected as
	 * the user still might have adjusted the 'keyboard' alias to
	 * point to the RS232 keyboard.
	 */
	if ((!strcmp(sparc64_model, "SUNW,UltraAX-MP") ||
	    !strcmp(sparc64_model, "SUNW,UltraSPARC-IIi-Engine")) &&
	    OF_finddevice("keyboard") != ofw_bus_get_node(dev)) {
		device_disable(dev);
		return (ENXIO);
	}

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

	/*
	 * The '8042' node has two identical 8 addresses wide resources
	 * which are apparently meant to be used one for the keyboard
	 * half and the other one for the mouse half. To simplify matters
	 * we use one for the command/data port resource and the other
	 * one for the status port resource as the atkbdc(4) back-end
	 * expects two struct resource rather than two bus space handles.
	 */
	rid = 0;
	if (bus_get_resource(dev, SYS_RES_MEMORY, rid, &start, &count) != 0) {
		device_printf(dev,
		    "cannot determine command/data port resource\n");
		return (ENXIO);
	}
	port0 = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid, start, start, 1,
	    RF_ACTIVE);
	if (port0 == NULL) {
		device_printf(dev,
		    "cannot allocate command/data port resource\n");
		return (ENXIO);
	}

	rid = 1;
	if (bus_get_resource(dev, SYS_RES_MEMORY, rid, &start, &count) != 0) {
		device_printf(dev, "cannot determine status port resource\n");
		error = ENXIO;
		goto fail_port0;
	}
	start += KBD_STATUS_PORT;
	port1 = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid, start, start, 1,
	    RF_ACTIVE);
	if (port1 == NULL) {
		device_printf(dev, "cannot allocate status port resource\n");
		error = ENXIO;
		goto fail_port0;
	}

	error = atkbdc_probe_unit(device_get_unit(dev), port0, port1);
	if (error != 0)
		device_printf(dev, "atkbdc_porbe_unit failed\n");

	bus_release_resource(dev, SYS_RES_MEMORY, 1, port1);
 fail_port0:
	bus_release_resource(dev, SYS_RES_MEMORY, 0, port0);

	return (error);
}

static int
lbc_attach(device_t dev)
{
	struct lbc_softc *sc;
	struct rman *rm;
	const struct lbc_resource *lbcres;
	int error;

	sc = device_get_softc(dev);
	sc->sc_dev = dev;

	sc->sc_rid = 0;
	sc->sc_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->sc_rid,
	    RF_ACTIVE);
	if (sc->sc_res == NULL)
		return (ENXIO);

	sc->sc_bst = rman_get_bustag(sc->sc_res);
	sc->sc_bsh = rman_get_bushandle(sc->sc_res);

	rm = &sc->sc_rman;
	rm->rm_type = RMAN_ARRAY;
	rm->rm_descr = "MPC85XX Local Bus Space";
	rm->rm_start = 0UL;
	rm->rm_end = ~0UL;
	error = rman_init(rm);
	if (error)
		goto fail;

	error = rman_manage_region(rm, rm->rm_start, rm->rm_end);
	if (error) {
		rman_fini(rm);
		goto fail;
	}

	/*
	 * Initialize configuration register:
	 * - enable Local Bus
	 * - set data buffer control signal function
	 * - disable parity byte select
	 * - set ECC parity type
	 * - set bus monitor timing and timer prescale
	 */
	lbc_write_reg(sc, LBC85XX_LBCR, 0x00000000);

	/*
	 * Initialize clock ratio register:
	 * - disable PLL bypass mode
	 * - configure LCLK delay cycles for the assertion of LALE
	 * - set system clock divider
	 */
	lbc_write_reg(sc, LBC85XX_LCRR, 0x00030008);

	lbcres = mpc85xx_lbc_resources;

	for (; lbcres->lbr_devtype; lbcres++)
		if (!lbc_mk_child(dev, lbcres)) {
			error = ENXIO;
			goto fail;
		}

	return (bus_generic_attach(dev));

fail:
	bus_release_resource(dev, SYS_RES_MEMORY, sc->sc_rid, sc->sc_res);
	return (error);
}

static int
gx_attach(device_t dev)
{
	struct ifnet *ifp;
	struct gx_softc *sc;
	uint8_t mac[6];
	int error;
	int rid;

	sc = device_get_softc(dev);
	sc->sc_dev = dev;
	sc->sc_port = device_get_unit(dev);

	/* Read MAC address.  */
	GXEMUL_ETHER_DEV_WRITE(GXEMUL_ETHER_DEV_MAC, (uintptr_t)mac);

	/* Allocate and establish interrupt.  */
	rid = 0;
	sc->sc_intr = bus_alloc_resource(sc->sc_dev, SYS_RES_IRQ, &rid,
	    GXEMUL_ETHER_DEV_IRQ - 2, GXEMUL_ETHER_DEV_IRQ - 2, 1, RF_ACTIVE);
	if (sc->sc_intr == NULL) {
		device_printf(dev, "unable to allocate IRQ.\n");
		return (ENXIO);
	}

	error = bus_setup_intr(sc->sc_dev, sc->sc_intr, INTR_TYPE_NET, NULL,
	    gx_rx_intr, sc, &sc->sc_intr_cookie);
	if (error != 0) {
		device_printf(dev, "unable to setup interrupt.\n");
		bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_intr);
		return (ENXIO);
	}

	bus_describe_intr(sc->sc_dev, sc->sc_intr, sc->sc_intr_cookie, "rx");

	ifp = if_alloc(IFT_ETHER);
	if (ifp == NULL) {
		device_printf(dev, "cannot allocate ifnet.\n");
		bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_intr);
		return (ENOMEM);
	}

	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
	ifp->if_mtu = ETHERMTU;
	ifp->if_init = gx_init;
	ifp->if_softc = sc;
	ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST | IFF_ALLMULTI;
	ifp->if_ioctl = gx_ioctl;

	sc->sc_ifp = ifp;
	sc->sc_flags = ifp->if_flags;

	ifmedia_init(&sc->sc_ifmedia, 0, gx_medchange, gx_medstat);

	ifmedia_add(&sc->sc_ifmedia, IFM_ETHER | IFM_AUTO, 0, NULL);
	ifmedia_set(&sc->sc_ifmedia, IFM_ETHER | IFM_AUTO);

	mtx_init(&sc->sc_mtx, "GXemul Ethernet", NULL, MTX_DEF);

	ether_ifattach(ifp, mac);

	ifp->if_transmit = gx_transmit;

	return (bus_generic_attach(dev));
}