Пример #1
0
/*
 * Check if the device can be found at the port given
 * and if so, set it up ready for further work
 * as an argument, takes the isa_device structure from
 * autoconf.c
 */
static int
bt_isa_probe(device_t dev)
{
	/*
	 * find unit and check we have that many defined
	 */
	int	port_index;
        int	max_port_index;

	/* No pnp support */
	if (isa_get_vendorid(dev))
		return (ENXIO);

	port_index = 0;
	max_port_index = BT_NUM_ISAPORTS - 1;
	/*
	 * Bound our board search if the user has
	 * specified an exact port.
	 */
	bt_find_probe_range(isa_get_port(dev), &port_index, &max_port_index);

	if (port_index < 0)
		return (ENXIO);

	/* Attempt to find an adapter */
	for (;port_index <= max_port_index; port_index++) {
		struct bt_probe_info info;
		u_int ioport;

		ioport = bt_iop_from_bio(port_index);

		/*
		 * Ensure this port has not already been claimed already
		 * by a PCI, EISA or ISA adapter.
		 */
		if (bt_check_probed_iop(ioport) != 0)
			continue;

		/* Initialise the softc for use during probing */
		if (bt_isa_alloc_resources(dev, ioport,
					   ioport + BT_NREGS -1) != 0)
			continue;

		/* We're going to attempt to probe it now, so mark it probed */
		bt_mark_probed_bio(port_index);

		if (bt_port_probe(dev, &info) != 0) {
			if (bootverbose)
				kprintf("bt_isa_probe: Probe failed at 0x%x\n",
				       ioport);
			bt_isa_release_resources(dev);
			continue;
		}

		bt_isa_release_resources(dev);

		bus_set_resource(dev, SYS_RES_DRQ, 0, info.drq, 1, -1);
		bus_set_resource(dev, SYS_RES_IRQ, 0, info.irq, 1,
		    machintr_legacy_intr_cpuid(info.irq));

		return (0);
	}

	return (ENXIO);
}
Пример #2
0
/*
 * Attach all the sub-devices we can find
 */
static int
bt_isa_attach(device_t dev)
{
	struct	bt_softc *bt = device_get_softc(dev);
	bus_dma_filter_t *filter;
	void		 *filter_arg;
	bus_addr_t	 lowaddr;
	int		 error, drq;

	/* Initialise softc */
	error = bt_isa_alloc_resources(dev, 0, ~0);
	if (error) {
		device_printf(dev, "can't allocate resources in bt_isa_attach\n");
		return error;
	}

	/* Program the DMA channel for external control */
	if ((drq = isa_get_drq(dev)) != -1)
		isa_dmacascade(drq);

	/* Allocate our parent dmatag */
	filter = NULL;
	filter_arg = NULL;
	lowaddr = BUS_SPACE_MAXADDR_24BIT;

	/* XXX Should be a child of the ISA bus dma tag */
	if (bus_dma_tag_create(/*parent*/NULL, /*alignemnt*/1, /*boundary*/0,
                               lowaddr, /*highaddr*/BUS_SPACE_MAXADDR,
                               filter, filter_arg,
                               /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
                               /*nsegments*/BUS_SPACE_UNRESTRICTED,
                               /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
                               /*flags*/0, &bt->parent_dmat) != 0) {
		bt_isa_release_resources(dev);
                return (ENOMEM);
        }                              

        error = bt_init(dev);
        if (error) {
		bt_isa_release_resources(dev);
                return (ENOMEM);
        }

	if (lowaddr != BUS_SPACE_MAXADDR_32BIT) {
		/* DMA tag for our sense buffers */
		if (bus_dma_tag_create(bt->parent_dmat, /*alignment*/1,
				       /*boundary*/0,
				       /*lowaddr*/BUS_SPACE_MAXADDR,
				       /*highaddr*/BUS_SPACE_MAXADDR,
				       /*filter*/NULL, /*filterarg*/NULL,
				       bt->max_ccbs
					   * sizeof(struct scsi_sense_data),
				       /*nsegments*/1,
				       /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
				       /*flags*/0, &bt->sense_dmat) != 0) {
			bt_isa_release_resources(dev);
			return (ENOMEM);
		}

		bt->init_level++;

		/* Allocation of sense buffers */
		if (bus_dmamem_alloc(bt->sense_dmat,
				     (void *)&bt->sense_buffers,
				     BUS_DMA_NOWAIT, &bt->sense_dmamap) != 0) {
			bt_isa_release_resources(dev);
			return (ENOMEM);
		}

		bt->init_level++;

		/* And permanently map them */
		bus_dmamap_load(bt->sense_dmat, bt->sense_dmamap,
       				bt->sense_buffers,
				bt->max_ccbs * sizeof(*bt->sense_buffers),
				btmapsensebuffers, bt, /*flags*/0);

		bt->init_level++;
	}

	error = bt_attach(dev);
	if (error) {
		bt_isa_release_resources(dev);
		return (error);
	}

	return (0);
}
Пример #3
0
/*
 * Attach all the sub-devices we can find
 */
static int
bt_isa_attach(device_t dev)
{
	struct	bt_softc *bt = device_get_softc(dev);
	bus_dma_filter_t *filter;
	void		 *filter_arg;
	bus_addr_t	 lowaddr;
	int		 error, drq;

	/* Initialise softc */
	error = bt_isa_alloc_resources(dev, 0, ~0);
	if (error) {
		device_printf(dev, "can't allocate resources in bt_isa_attach\n");
		return error;
	}

	/* Program the DMA channel for external control */
	if ((drq = isa_get_drq(dev)) != -1)
		isa_dmacascade(drq);

	/* Allocate our parent dmatag */
	filter = NULL;
	filter_arg = NULL;
	lowaddr = BUS_SPACE_MAXADDR_24BIT;
	if (bt->model[0] == '4') {
		/*
		 * This is a VL adapter.  Typically, VL devices have access
		 * to the full 32bit address space.  On BT-445S adapters
		 * prior to revision E, there is a hardware bug that causes
		 * corruption of transfers to/from addresses in the range of
		 * the BIOS modulo 16MB.  The only properly functioning
		 * BT-445S Host Adapters have firmware version 3.37.
		 * If we encounter one of these adapters and the BIOS is
		 * installed, install a filter function for our bus_dma_map
		 * that will catch these accesses and bounce them to a safe
		 * region of memory.
		 */
		if (bt->bios_addr != 0
		 && strcmp(bt->model, "445S") == 0
		 && strcmp(bt->firmware_ver, "3.37") < 0) {
			filter = btvlbouncefilter;
			filter_arg = bt;
		} else {
			lowaddr = BUS_SPACE_MAXADDR_32BIT;
		}
	}
			
	/* XXX Should be a child of the ISA or VL bus dma tag */
	if (bus_dma_tag_create(	/* parent	*/ bus_get_dma_tag(dev),
				/* alignemnt	*/ 1,
				/* boundary	*/ 0,
				/* lowaddr	*/ lowaddr,
				/* highaddr	*/ BUS_SPACE_MAXADDR,
				/* filter	*/ filter,
				/* filterarg	*/ filter_arg,
				/* maxsize	*/ BUS_SPACE_MAXSIZE_32BIT,
				/* nsegments	*/ ~0,
				/* maxsegsz	*/ BUS_SPACE_MAXSIZE_32BIT,
				/* flags	*/ 0,
				/* lockfunc	*/ NULL,
				/* lockarg	*/ NULL,
				&bt->parent_dmat) != 0) {
		bt_isa_release_resources(dev);
                return (ENOMEM);
        }                              

        error = bt_init(dev);
        if (error) {
		bt_isa_release_resources(dev);
                return (ENOMEM);
        }

	if (lowaddr != BUS_SPACE_MAXADDR_32BIT) {
		/* DMA tag for our sense buffers */
		if (bus_dma_tag_create(
				/* parent	*/ bt->parent_dmat,
				/* alignment	*/ 1,
				/* boundary	*/ 0,
				/* lowaddr	*/ BUS_SPACE_MAXADDR,
				/* highaddr	*/ BUS_SPACE_MAXADDR,
				/* filter	*/ NULL,
				/* filterarg	*/ NULL,
				/* maxsize	*/ bt->max_ccbs *
						   sizeof(struct scsi_sense_data),
				/* nsegments	*/ 1,
				/* maxsegsz	*/ BUS_SPACE_MAXSIZE_32BIT,
				/* flags	*/ 0,
				/* lockfunc	*/ NULL,
				/* lockarg	*/ NULL,
				&bt->sense_dmat) != 0) {
			bt_isa_release_resources(dev);
			return (ENOMEM);
		}

		bt->init_level++;

		/* Allocation of sense buffers */
		if (bus_dmamem_alloc(bt->sense_dmat,
				     (void **)&bt->sense_buffers,
				     BUS_DMA_NOWAIT, &bt->sense_dmamap) != 0) {
			bt_isa_release_resources(dev);
			return (ENOMEM);
		}

		bt->init_level++;

		/* And permanently map them */
		bus_dmamap_load(bt->sense_dmat, bt->sense_dmamap,
       				bt->sense_buffers,
				bt->max_ccbs * sizeof(*bt->sense_buffers),
				btmapsensebuffers, bt, /*flags*/0);

		bt->init_level++;
	}

	error = bt_attach(dev);
	if (error) {
		bt_isa_release_resources(dev);
		return (error);
	}

	return (0);
}