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-rw-r--r--sys/dev/buslogic/bt_isa.c358
1 files changed, 358 insertions, 0 deletions
diff --git a/sys/dev/buslogic/bt_isa.c b/sys/dev/buslogic/bt_isa.c
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+/*
+ * Product specific probe and attach routines for:
+ * Buslogic BT-54X and BT-445 cards
+ *
+ * Copyright (c) 1998, 1999 Justin T. Gibbs
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification, immediately at the beginning of the file.
+ * 2. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/lock.h>
+#include <sys/mutex.h>
+#include <sys/bus.h>
+
+#include <machine/bus_pio.h>
+#include <machine/bus.h>
+#include <machine/resource.h>
+#include <sys/rman.h>
+
+#include <isa/isavar.h>
+#include <dev/buslogic/btreg.h>
+
+#include <cam/scsi/scsi_all.h>
+
+static bus_dma_filter_t btvlbouncefilter;
+static bus_dmamap_callback_t btmapsensebuffers;
+
+static int
+bt_isa_alloc_resources(device_t dev, u_long portstart, u_long portend)
+{
+ int rid;
+ struct resource *port;
+ struct resource *irq;
+ struct resource *drq;
+
+ rid = 0;
+ port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
+ portstart, portend, BT_NREGS, RF_ACTIVE);
+ if (!port)
+ return (ENOMEM);
+
+ if (isa_get_irq(dev) != -1) {
+ rid = 0;
+ irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid,
+ 0, ~0, 1, RF_ACTIVE);
+ if (!irq) {
+ if (port)
+ bus_release_resource(dev, SYS_RES_IOPORT,
+ 0, port);
+ return (ENOMEM);
+ }
+ } else
+ irq = 0;
+
+ if (isa_get_drq(dev) != -1) {
+ rid = 0;
+ drq = bus_alloc_resource(dev, SYS_RES_DRQ, &rid,
+ 0, ~0, 1, RF_ACTIVE);
+ if (!drq) {
+ if (port)
+ bus_release_resource(dev, SYS_RES_IOPORT,
+ 0, port);
+ if (irq)
+ bus_release_resource(dev, SYS_RES_IRQ,
+ 0, irq);
+ return (ENOMEM);
+ }
+ } else
+ drq = 0;
+
+ bt_init_softc(dev, port, irq, drq);
+
+ return (0);
+}
+
+static void
+bt_isa_release_resources(device_t dev)
+{
+ struct bt_softc *bt = device_get_softc(dev);
+
+ if (bt->port)
+ bus_release_resource(dev, SYS_RES_IOPORT, 0, bt->port);
+ if (bt->irq)
+ bus_release_resource(dev, SYS_RES_IRQ, 0, bt->irq);
+ if (bt->drq)
+ bus_release_resource(dev, SYS_RES_DRQ, 0, bt->drq);
+ bt_free_softc(dev);
+}
+
+/*
+ * 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)
+ printf("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);
+ bus_set_resource(dev, SYS_RES_IRQ, 0, info.irq, 1);
+
+ return (0);
+ }
+
+ return (ENXIO);
+}
+
+/*
+ * 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 */ NULL,
+ /* 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 */ busdma_lock_mutex,
+ /* lockarg */ &Giant,
+ &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 */ busdma_lock_mutex,
+ /* lockarg */ &Giant,
+ &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);
+}
+
+#define BIOS_MAP_SIZE (16 * 1024)
+
+static int
+btvlbouncefilter(void *arg, bus_addr_t addr)
+{
+ struct bt_softc *bt;
+
+ bt = (struct bt_softc *)arg;
+
+ addr &= BUS_SPACE_MAXADDR_24BIT;
+
+ if (addr == 0
+ || (addr >= bt->bios_addr
+ && addr < (bt->bios_addr + BIOS_MAP_SIZE)))
+ return (1);
+ return (0);
+}
+
+static void
+btmapsensebuffers(void *arg, bus_dma_segment_t *segs, int nseg, int error)
+{
+ struct bt_softc* bt;
+
+ bt = (struct bt_softc*)arg;
+ bt->sense_buffers_physbase = segs->ds_addr;
+}
+
+static device_method_t bt_isa_methods[] = {
+ /* Device interface */
+ DEVMETHOD(device_probe, bt_isa_probe),
+ DEVMETHOD(device_attach, bt_isa_attach),
+
+ { 0, 0 }
+};
+
+static driver_t bt_isa_driver = {
+ "bt",
+ bt_isa_methods,
+ sizeof(struct bt_softc),
+};
+
+static devclass_t bt_devclass;
+
+DRIVER_MODULE(bt, isa, bt_isa_driver, bt_devclass, 0, 0);
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