Mylex/Buslogic MultiMaster SCSI-Host Adapter Driver for CAM.

1 files changed, 322 insertions, 0 deletions

diff --git a/sys/isa/bt_isa.c b/sys/isa/bt_isa.c
new file mode 100644
index 0000000..adab9cf
--- /dev/null
+++ b/sys/isa/bt_isa.c
@@ -0,0 +1,322 @@
+/*
+ * Product specific probe and attach routines for:
+ *      Buslogic BT-54X and BT-445 cards
+ *
+ * Copyright (c) 1998 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.
+ *
+ *	$Id$
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+
+#include <machine/bus_pio.h>
+#include <machine/bus.h>
+
+#include <i386/isa/isa_device.h>
+#include <dev/buslogic/btreg.h>
+
+#include <cam/scsi/scsi_all.h>
+
+#include "ioconf.h"
+
+static	int bt_isa_probe __P((struct isa_device *dev));
+static	int bt_isa_attach __P((struct isa_device *dev));
+static	void bt_isa_intr __P((void *unit));
+
+static	bus_dma_filter_t btvlbouncefilter;
+static	bus_dmamap_callback_t btmapsensebuffers;
+
+struct isa_driver btdriver =
+{
+    bt_isa_probe,
+    bt_isa_attach,
+    "bt"
+};
+
+/*
+ * 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(dev)
+	struct isa_device *dev;
+{
+	/*
+	 * find unit and check we have that many defined
+	 */
+	struct	bt_softc *bt;
+	int	port_index;
+        int	max_port_index;
+
+	/*
+	 * We ignore the unit number assigned by config to allow
+	 * consistant numbering between PCI/EISA/ISA devices.
+	 * This is a total kludge until we have a configuration
+	 * manager.
+	 */
+	dev->id_unit = bt_unit;
+
+	bt = NULL;
+	port_index = 0;
+	max_port_index = BT_NUM_ISAPORTS - 1;
+	/*
+	 * Bound our board search if the user has
+	 * specified an exact port.
+	 */
+	if (dev->id_iobase > 0) {
+		for (;port_index <= max_port_index; port_index++)
+			if (dev->id_iobase >= bt_isa_ports[port_index].addr)
+				break;
+		if ((port_index > max_port_index)
+		 || (dev->id_iobase != bt_isa_ports[port_index].addr)) {
+			printf("
+bt_isa_probe: Invalid baseport of 0x%x specified.
+bt_isa_probe: Nearest valid baseport is 0x%x.
+bt_isa_probe: Failing probe.\n",
+			       dev->id_iobase,
+			       (port_index <= max_port_index)
+				    ? bt_isa_ports[port_index].addr
+				    : bt_isa_ports[max_port_index].addr);
+			return 0;
+		}
+	}
+
+	/* Attempt to find an adapter */
+	for (;port_index <= max_port_index; port_index++) {
+		config_data_t config_data;
+		u_int ioport;
+		int error;
+
+		ioport = bt_isa_ports[port_index].addr;
+
+		/*
+		 * Ensure this port has not already been claimed already
+		 * by a PCI or EISA adapter.
+		 */
+		if (bt_check_probed_iop(ioport) != 0)
+			continue;
+
+		/* Allocate a softc for use during probing */
+		bt = bt_alloc(dev->id_unit, I386_BUS_SPACE_IO, ioport);
+
+		if (bt == NULL)
+			break;
+
+		/* We're going to attempt to probe it now, so mark it probed */
+		bt_mark_probed_bio(port_index);
+
+		/* See if there is really a card present */
+		if (bt_probe(bt) || bt_fetch_adapter_info(bt)) {
+			bt_free(bt);
+			continue;
+		}
+
+		/*
+		 * Determine our IRQ, and DMA settings and
+		 * export them to the configuration system.
+		 */
+		error = bt_cmd(bt, BOP_INQUIRE_CONFIG, NULL, /*parmlen*/0,
+			       (u_int8_t*)&config_data, sizeof(config_data),
+			       DEFAULT_CMD_TIMEOUT);
+		if (error != 0) {
+			printf("bt_isa_probe: Could not determine IRQ or DMA "
+			       "settings for adapter at 0x%x.  Failing probe\n",
+			       ioport);
+			bt_free(bt);
+			continue;
+		}
+
+		if (bt->model[0] == '5') {
+			/* DMA settings only make sense for ISA cards */
+			switch (config_data.dma_chan) {
+			case DMA_CHAN_5:
+				dev->id_drq = 5;
+				break;
+			case DMA_CHAN_6:
+				dev->id_drq = 6;
+				break;
+			case DMA_CHAN_7:
+				dev->id_drq = 7;
+				break;
+			default:
+				printf("bt_isa_probe: Invalid DMA setting "
+				       "detected for adapter at 0x%x.  "
+				       "Failing probe\n", ioport);
+			}
+		} else {
+			/* VL DMA */
+			dev->id_drq = -1;
+		}
+		dev->id_iobase = bt_isa_ports[port_index].addr;
+		dev->id_irq = (config_data.irq << 9);
+		dev->id_intr = bt_isa_intr;
+		bt_unit++;
+		return (BT_NREGS);
+	}
+
+	return (0);
+}
+
+/*
+ * Attach all the sub-devices we can find
+ */
+static int
+bt_isa_attach(dev)
+	struct isa_device *dev;
+{
+	struct	bt_softc *bt;
+	bus_dma_filter_t *filter;
+	void		 *filter_arg;
+	bus_addr_t	 lowaddr;
+
+	bt = bt_softcs[dev->id_unit];
+	if (dev->id_drq != -1)
+		isa_dmacascade(dev->id_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*/0, /*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_free(bt);
+                return (-1);
+        }                              
+
+        if (bt_init(bt)) {
+                bt_free(bt);
+                return (-1);
+        }
+
+	if (lowaddr != BUS_SPACE_MAXADDR_32BIT) {
+		/* DMA tag for our sense buffers */
+		if (bus_dma_tag_create(bt->parent_dmat, /*alignment*/0,
+				       /*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_free(bt);
+			return (-1);
+		}
+
+		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_free(bt);
+			return (-1);
+		}
+
+		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++;
+	}
+
+	return (bt_attach(bt));
+}
+
+/*
+ * Handle an ISA interrupt.
+ * XXX should go away as soon as ISA interrupt handlers
+ * take a (void *) arg.
+ */
+static void
+bt_isa_intr(void *unit)
+{
+	struct bt_softc* arg = bt_softcs[(int)unit];
+	bt_intr((void *)arg);
+}
+
+#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;
+}