1 files changed, 712 insertions, 0 deletions

diff --git a/sys/dev/mpt/mpt_pci.c b/sys/dev/mpt/mpt_pci.c
new file mode 100644
index 0000000..9a0a5ba
--- /dev/null
+++ b/sys/dev/mpt/mpt_pci.c
@@ -0,0 +1,712 @@
+/* $FreeBSD$ */
+/*
+ * PCI specific probe and attach routines for LSI Fusion Adapters
+ * FreeBSD Version.
+ *
+ * Copyright (c)  2000, 2001 by Greg Ansley
+ * Partially derived from Matt Jacob's ISP driver.
+ *
+ * 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 immediately at the beginning of the file, without modification,
+ *    this list of conditions, and the following disclaimer.
+ * 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.
+ */
+/*
+ * Additional Copyright (c) 2002 by Matthew Jacob under same license.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/bus.h>
+
+#include <pci/pcireg.h>
+#include <pci/pcivar.h>
+
+#include <machine/bus_memio.h>
+#include <machine/bus_pio.h>
+#include <machine/bus.h>
+#include <machine/resource.h>
+#include <sys/rman.h>
+#include <sys/malloc.h>
+
+#include <dev/mpt/mpt_freebsd.h>
+
+#ifndef	PCI_VENDOR_LSI
+#define	PCI_VENDOR_LSI			0x1000
+#endif
+
+#ifndef	PCI_PRODUCT_LSI_FC909
+#define	PCI_PRODUCT_LSI_FC909		0x0620
+#endif
+
+#ifndef	PCI_PRODUCT_LSI_FC909A
+#define	PCI_PRODUCT_LSI_FC909A		0x0621
+#endif
+
+#ifndef	PCI_PRODUCT_LSI_FC919
+#define	PCI_PRODUCT_LSI_FC919		0x0624
+#endif
+
+#ifndef	PCI_PRODUCT_LSI_FC929
+#define	PCI_PRODUCT_LSI_FC929		0x0622
+#endif
+
+#ifndef	PCI_PRODUCT_LSI_1030
+#define	PCI_PRODUCT_LSI_1030		0x0030
+#endif
+
+#ifndef	PCIM_CMD_SERRESPEN
+#define	PCIM_CMD_SERRESPEN	0x0100
+#endif
+
+
+
+#define	MEM_MAP_REG	0x14
+#define	MEM_MAP_SRAM	0x1C
+
+static int mpt_probe(device_t);
+static int mpt_attach(device_t);
+static void mpt_free_bus_resources(mpt_softc_t *mpt);
+static int mpt_detach(device_t);
+static int mpt_shutdown(device_t);
+static int mpt_dma_mem_alloc(mpt_softc_t *mpt);
+static void mpt_dma_mem_free(mpt_softc_t *mpt);
+static void mpt_read_config_regs(mpt_softc_t *mpt);
+static void mpt_pci_intr(void *);
+
+static device_method_t mpt_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_probe,		mpt_probe),
+	DEVMETHOD(device_attach,	mpt_attach),
+	DEVMETHOD(device_detach,	mpt_detach),
+	DEVMETHOD(device_shutdown,	mpt_shutdown),
+	{ 0, 0 }
+};
+
+static driver_t mpt_driver = {
+	"mpt", mpt_methods, sizeof (mpt_softc_t)
+};
+static devclass_t mpt_devclass;
+DRIVER_MODULE(mpt, pci, mpt_driver, mpt_devclass, 0, 0);
+MODULE_VERSION(mpt, 1);
+
+int
+mpt_intr(void *dummy)
+{
+	int nrepl = 0;
+	u_int32_t reply;
+	mpt_softc_t *mpt = (mpt_softc_t *)dummy;
+
+	if ((mpt_read(mpt, MPT_OFFSET_INTR_STATUS) & MPT_INTR_REPLY_READY) == 0)
+		return (0);
+	reply = mpt_pop_reply_queue(mpt);
+	while (reply != MPT_REPLY_EMPTY) {
+		nrepl++;
+		if (mpt->verbose > 1) {
+			if ((reply & MPT_CONTEXT_REPLY) != 0)  {
+				/* Address reply; IOC has something to say */
+				mpt_print_reply(MPT_REPLY_PTOV(mpt, reply));
+			} else {
+				/* Context reply ; all went well */
+				mpt_prt(mpt, "context %u reply OK", reply);
+			}
+		}
+		mpt_done(mpt, reply);
+		reply = mpt_pop_reply_queue(mpt);
+	}
+	return (nrepl != 0);
+}
+
+static int
+mpt_probe(device_t dev)
+{
+	char *desc;
+
+	if (pci_get_vendor(dev) != PCI_VENDOR_LSI)
+		return (ENXIO);
+
+	switch ((pci_get_device(dev) & ~1)) {
+	case PCI_PRODUCT_LSI_FC909:
+		desc = "LSILogic FC909 FC Adapter";
+		break;
+	case PCI_PRODUCT_LSI_FC909A:
+		desc = "LSILogic FC909A FC Adapter";
+		break;
+	case PCI_PRODUCT_LSI_FC919:
+		desc = "LSILogic FC919 FC Adapter";
+		break;
+	case PCI_PRODUCT_LSI_FC929:
+		desc = "LSILogic FC929 FC Adapter";
+		break;
+	case PCI_PRODUCT_LSI_1030:
+		desc = "LSILogic 1030 Ultra4 Adapter";
+		break;
+	default:
+		return (ENXIO);
+	}
+
+	device_set_desc(dev, desc);
+	return (0);
+}
+
+#ifdef	RELENG_4
+static void
+mpt_set_options(mpt_softc_t *mpt)
+{
+	int bitmap;
+
+	bitmap = 0;
+	if (getenv_int("mpt_disable", &bitmap)) {
+		if (bitmap & (1 << mpt->unit)) {
+			mpt->disabled = 1;
+		}
+	}
+
+	bitmap = 0;
+	if (getenv_int("mpt_debug", &bitmap)) {
+		if (bitmap & (1 << mpt->unit)) {
+			mpt->verbose = 2;
+		}
+	}
+
+}
+#else
+static void
+mpt_set_options(mpt_softc_t *mpt)
+{
+	int tval;
+
+	tval = 0;
+	if (resource_int_value(device_get_name(mpt->dev),
+	    device_get_unit(mpt->dev), "disable", &tval) == 0 && tval != 0) {
+		mpt->disabled = 1;
+	}
+	tval = 0;
+	if (resource_int_value(device_get_name(mpt->dev),
+	    device_get_unit(mpt->dev), "debug", &tval) == 0 && tval != 0) {
+		mpt->verbose += tval;
+	}
+}
+#endif
+
+
+static void
+mpt_link_peer(mpt_softc_t *mpt)
+{
+	mpt_softc_t *mpt2;
+
+	if (mpt->unit == 0) {
+		return;
+	}
+
+	/*
+	 * XXX: depends on probe order
+	 */
+	mpt2 = (mpt_softc_t *) devclass_get_softc(mpt_devclass, mpt->unit-1);
+
+	if (mpt2 == NULL) {
+		return;
+	}
+	if (pci_get_vendor(mpt2->dev) != pci_get_vendor(mpt->dev)) {
+		return;
+	}
+	if (pci_get_device(mpt2->dev) != pci_get_device(mpt->dev)) {
+		return;
+	}
+	mpt->mpt2 = mpt2;
+	mpt2->mpt2 = mpt;
+	if (mpt->verbose) {
+		mpt_prt(mpt, "linking with peer (mpt%d)",
+		    device_get_unit(mpt2->dev));
+	}
+}
+
+
+static int
+mpt_attach(device_t dev)
+{
+	int iqd;
+	u_int32_t data, cmd;
+	mpt_softc_t *mpt;
+
+	/* Allocate the softc structure */
+	mpt  = (mpt_softc_t*) device_get_softc(dev);
+	if (mpt == NULL) {
+		device_printf(dev, "cannot allocate softc\n");
+		return (ENOMEM);
+	}
+	bzero(mpt, sizeof (mpt_softc_t));
+	switch ((pci_get_device(dev) & ~1)) {
+	case PCI_PRODUCT_LSI_FC909:
+	case PCI_PRODUCT_LSI_FC909A:
+	case PCI_PRODUCT_LSI_FC919:
+	case PCI_PRODUCT_LSI_FC929:
+		mpt->is_fc = 1;
+		break;
+	default:
+		break;
+	}
+	mpt->dev = dev;
+	mpt->unit = device_get_unit(dev);
+	mpt_set_options(mpt);
+	mpt->verbose += (bootverbose != 0)? 1 : 0;
+
+	/* Make sure memory access decoders are enabled */
+	cmd = pci_read_config(dev, PCIR_COMMAND, 2);
+	if ((cmd & PCIM_CMD_MEMEN) == 0) {
+		device_printf(dev, "Memory accesses disabled");
+		goto bad;
+	}
+
+	/*
+	 * Make sure that SERR, PERR, WRITE INVALIDATE and BUSMASTER are set.
+	 */
+	cmd |=
+	    PCIM_CMD_SERRESPEN | PCIM_CMD_PERRESPEN |
+	    PCIM_CMD_BUSMASTEREN | PCIM_CMD_MWRICEN;
+	pci_write_config(dev, PCIR_COMMAND, cmd, 2);
+
+	/*
+	 * Make sure we've disabled the ROM.
+	 */
+	data = pci_read_config(dev, PCIR_BIOS, 4);
+	data &= ~1;
+	pci_write_config(dev, PCIR_BIOS, data, 4);
+
+
+	/*
+	 * Is this part a dual?
+	 * If so, link with our partner (around yet)
+	 */
+	if ((pci_get_device(dev) & ~1) == PCI_PRODUCT_LSI_FC929 ||
+	    (pci_get_device(dev) & ~1) == PCI_PRODUCT_LSI_1030) {
+		mpt_link_peer(mpt);
+	}
+
+	/* Set up the memory regions */
+	/* Allocate kernel virtual memory for the 9x9's Mem0 region */
+	mpt->pci_reg_id = MEM_MAP_REG;
+	mpt->pci_reg = bus_alloc_resource(dev, SYS_RES_MEMORY,
+			&mpt->pci_reg_id, 0, ~0, 0, RF_ACTIVE);
+	if (mpt->pci_reg == NULL) {
+		device_printf(dev, "unable to map any ports\n");
+		goto bad;
+	}
+	mpt->pci_st = rman_get_bustag(mpt->pci_reg);
+	mpt->pci_sh = rman_get_bushandle(mpt->pci_reg);
+	/*   Get the Physical Address */
+	mpt->pci_pa = rman_get_start(mpt->pci_reg);
+
+	/* Get a handle to the interrupt */
+	iqd = 0;
+	mpt->pci_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &iqd, 0, ~0,
+	    1, RF_ACTIVE | RF_SHAREABLE);
+	if (mpt->pci_irq == NULL) {
+		device_printf(dev, "could not allocate interrupt\n");
+		goto bad;
+	}
+
+	/* Register the interrupt handler */
+	if (bus_setup_intr(dev, mpt->pci_irq, MPT_IFLAGS, mpt_pci_intr,
+	    mpt, &mpt->ih)) {
+		device_printf(dev, "could not setup interrupt\n");
+		goto bad;
+	}
+
+	MPT_LOCK_SETUP(mpt);
+
+	/* Disable interrupts at the part */
+	mpt_disable_ints(mpt);
+
+	/* Allocate dma memory */
+	if (mpt_dma_mem_alloc(mpt)) {
+		device_printf(dev, "Could not allocate DMA memory\n");
+		goto bad;
+	}
+
+	/*
+	 * Save the PCI config register values
+ 	 *
+	 * Hard resets are known to screw up the BAR for diagnostic
+	 * memory accesses (Mem1).
+	 *
+	 * Using Mem1 is known to make the chip stop responding to 
+	 * configuration space transfers, so we need to save it now
+	 */
+
+	mpt_read_config_regs(mpt);
+
+	/* Initialize the hardware */
+	if (mpt->disabled == 0) {
+		MPT_LOCK(mpt);
+		if (mpt_init(mpt, MPT_DB_INIT_HOST) != 0) {
+			MPT_UNLOCK(mpt);
+			goto bad;
+		}
+
+		/*
+		 *  Attach to CAM
+		 */
+		MPTLOCK_2_CAMLOCK(mpt);
+		mpt_cam_attach(mpt);
+		CAMLOCK_2_MPTLOCK(mpt);
+		MPT_UNLOCK(mpt);
+	}
+
+	return (0);
+
+bad:
+	mpt_dma_mem_free(mpt);
+	mpt_free_bus_resources(mpt);
+
+	/*
+	 * but return zero to preserve unit numbering
+	 */
+	return (0);
+}
+
+/*
+ * Free bus resources
+ */
+static void
+mpt_free_bus_resources(mpt_softc_t *mpt)
+{
+	if (mpt->ih) {
+		bus_teardown_intr(mpt->dev, mpt->pci_irq, mpt->ih);
+		mpt->ih = 0;
+	}
+
+	if (mpt->pci_irq) {
+		bus_release_resource(mpt->dev, SYS_RES_IRQ, 0, mpt->pci_irq);
+		mpt->pci_irq = 0;
+	}
+
+	if (mpt->pci_reg) {
+		bus_release_resource(mpt->dev, SYS_RES_MEMORY, mpt->pci_reg_id,
+			mpt->pci_reg);
+		mpt->pci_reg = 0;
+	}
+	MPT_LOCK_DESTROY(mpt);
+}
+
+
+/*
+ * Disconnect ourselves from the system.
+ */
+static int
+mpt_detach(device_t dev)
+{
+	mpt_softc_t *mpt;
+	mpt  = (mpt_softc_t*) device_get_softc(dev);
+
+	mpt_prt(mpt, "mpt_detach");
+
+	if (mpt) {
+		mpt_disable_ints(mpt);
+		mpt_cam_detach(mpt);
+		mpt_reset(mpt);
+		mpt_dma_mem_free(mpt);
+		mpt_free_bus_resources(mpt);
+	}
+	return(0);
+}
+
+
+/*
+ * Disable the hardware
+ */
+static int
+mpt_shutdown(device_t dev)
+{
+	mpt_softc_t *mpt;
+	mpt  = (mpt_softc_t*) device_get_softc(dev);
+
+	if (mpt) {
+		mpt_reset(mpt);
+	}
+	return(0);
+}
+
+
+struct imush {
+	mpt_softc_t *mpt;
+	int error;
+	u_int32_t phys;
+};
+
+static void
+mpt_map_rquest(void *arg, bus_dma_segment_t *segs, int nseg, int error)
+{
+	struct imush *imushp = (struct imush *) arg;
+	imushp->error = error;
+	imushp->phys = segs->ds_addr;
+}
+
+
+static int
+mpt_dma_mem_alloc(mpt_softc_t *mpt)
+{
+	int i, error;
+	u_char *vptr;
+	u_int32_t pptr, end;
+	size_t len;
+	struct imush im;
+	device_t dev = mpt->dev;
+
+	/* Check if we alreay have allocated the reply memory */
+	if (mpt->reply_phys != NULL) {
+		return 0;
+	}
+
+	len = sizeof (request_t *) * MPT_REQ_MEM_SIZE(mpt);
+#ifdef	RELENG_4
+	mpt->request_pool = (request_t *) malloc(len, M_DEVBUF, M_WAITOK);
+	if (mpt->request_pool == NULL) {
+		device_printf(dev, "cannot allocate request pool\n");
+		return (1);
+	}
+	bzero(mpt->request_pool, len);
+#else
+	mpt->request_pool = (request_t *)
+	    malloc(len, M_DEVBUF, M_WAITOK | M_ZERO);
+	if (mpt->request_pool == NULL) {
+		device_printf(dev, "cannot allocate request pool\n");
+		return (1);
+	}
+#endif
+
+	/*
+	 * Create a dma tag for this device
+	 *
+	 * Align at page boundaries, limit to 32-bit addressing
+	 * (The chip supports 64-bit addressing, but this driver doesn't)
+	 */
+	if (bus_dma_tag_create(NULL, PAGE_SIZE, 0, BUS_SPACE_MAXADDR_32BIT,
+	    BUS_SPACE_MAXADDR, NULL, NULL, BUS_SPACE_MAXSIZE_32BIT,
+	    BUS_SPACE_MAXSIZE_32BIT, BUS_SPACE_UNRESTRICTED, 0,
+	    &mpt->parent_dmat) != 0) {
+		device_printf(dev, "cannot create parent dma tag\n");
+		return (1);
+	}
+
+	/* Create a child tag for reply buffers */
+	if (bus_dma_tag_create(mpt->parent_dmat, PAGE_SIZE,
+	    0, BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR,
+	    NULL, NULL, PAGE_SIZE, 1, BUS_SPACE_MAXSIZE_32BIT, 0,
+	    &mpt->reply_dmat) != 0) {
+		device_printf(dev, "cannot create a dma tag for replies\n");
+		return (1);
+	}
+
+	/* Allocate some DMA accessable memory for replies */
+	if (bus_dmamem_alloc(mpt->reply_dmat, (void **)&mpt->reply,
+	    BUS_DMA_NOWAIT, &mpt->reply_dmap) != 0) {
+		device_printf(dev, "cannot allocate %d bytes of reply memory\n",
+		     PAGE_SIZE);
+		return (1);
+	}
+
+	im.mpt = mpt;
+	im.error = 0;
+
+	/* Load and lock it into "bus space" */
+	bus_dmamap_load(mpt->reply_dmat, mpt->reply_dmap, mpt->reply,
+	    PAGE_SIZE, mpt_map_rquest, &im, 0);
+
+	if (im.error) {
+		device_printf(dev,
+		    "error %d loading dma map for DMA reply queue\n", im.error);
+		return (1);
+	}
+	mpt->reply_phys = im.phys;
+
+	/* Create a child tag for data buffers */
+	if (bus_dma_tag_create(mpt->parent_dmat, PAGE_SIZE,
+	    0, BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR,
+	    NULL, NULL, MAXBSIZE, MPT_SGL_MAX, BUS_SPACE_MAXSIZE_32BIT, 0,
+	    &mpt->buffer_dmat) != 0) {
+		device_printf(dev,
+		    "cannot create a dma tag for data buffers\n");
+		return (1);
+	}
+
+	/* Create a child tag for request buffers */
+	if (bus_dma_tag_create(mpt->parent_dmat, PAGE_SIZE,
+	    0, BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR,
+	    NULL, NULL, MPT_REQ_MEM_SIZE(mpt), 1, BUS_SPACE_MAXSIZE_32BIT, 0,
+	    &mpt->request_dmat) != 0) {
+		device_printf(dev, "cannot create a dma tag for requests\n");
+		return (1);
+	}
+
+	/* Allocate some DMA accessable memory for requests */
+	if (bus_dmamem_alloc(mpt->request_dmat, (void **)&mpt->request,
+	    BUS_DMA_NOWAIT, &mpt->request_dmap) != 0) {
+		device_printf(dev,
+		    "cannot allocate %d bytes of request memory\n",
+		    MPT_REQ_MEM_SIZE(mpt));
+		return (1);
+	}
+
+	im.mpt = mpt;
+	im.error = 0;
+
+	/* Load and lock it into "bus space" */
+        bus_dmamap_load(mpt->request_dmat, mpt->request_dmap, mpt->request,
+	    MPT_REQ_MEM_SIZE(mpt), mpt_map_rquest, &im, 0);
+
+	if (im.error) {
+		device_printf(dev,
+		    "error %d loading dma map for DMA request queue\n",
+		    im.error);
+		return (1);
+	}
+	mpt->request_phys = im.phys;
+
+	i = 0;
+	pptr =  mpt->request_phys;
+	vptr =  mpt->request;
+	end = pptr + MPT_REQ_MEM_SIZE(mpt);
+	while(pptr < end) {
+		request_t *req = &mpt->request_pool[i];
+		req->index = i++;
+
+		/* Store location of Request Data */
+		req->req_pbuf = pptr;
+		req->req_vbuf = vptr;
+
+		pptr += MPT_REQUEST_AREA;
+		vptr += MPT_REQUEST_AREA;
+
+		req->sense_pbuf = (pptr - MPT_SENSE_SIZE);
+		req->sense_vbuf = (vptr - MPT_SENSE_SIZE);
+
+		error = bus_dmamap_create(mpt->buffer_dmat, 0, &req->dmap);
+		if (error) {
+			device_printf(dev,
+			     "error %d creating per-cmd DMA maps\n", error);
+			return (1);
+		}
+	}
+	return (0);
+}
+
+
+
+/* Deallocate memory that was allocated by mpt_dma_mem_alloc 
+ */
+static void
+mpt_dma_mem_free(mpt_softc_t *mpt)
+{
+	int i;
+
+        /* Make sure we aren't double destroying */
+        if (mpt->reply_dmat == 0) {
+		if (mpt->verbose)
+			device_printf(mpt->dev,"Already released dma memory\n");
+		return;
+        }
+                
+	for (i = 0; i < MPT_MAX_REQUESTS(mpt); i++) {
+		bus_dmamap_destroy(mpt->buffer_dmat, mpt->request_pool[i].dmap);
+	}
+	bus_dmamap_unload(mpt->request_dmat, mpt->request_dmap);
+	bus_dmamem_free(mpt->request_dmat, mpt->request, mpt->request_dmap);
+	bus_dma_tag_destroy(mpt->request_dmat);
+	bus_dma_tag_destroy(mpt->buffer_dmat);
+	bus_dmamap_unload(mpt->reply_dmat, mpt->reply_dmap);
+	bus_dmamem_free(mpt->reply_dmat, mpt->reply, mpt->reply_dmap);
+	bus_dma_tag_destroy(mpt->reply_dmat);
+	bus_dma_tag_destroy(mpt->parent_dmat);
+	mpt->reply_dmat = 0;
+	free(mpt->request_pool, M_DEVBUF);
+	mpt->request_pool = 0;
+
+}
+
+
+
+/* Reads modifiable (via PCI transactions) config registers */
+static void
+mpt_read_config_regs(mpt_softc_t *mpt)
+{
+	mpt->pci_cfg.Command = pci_read_config(mpt->dev, PCIR_COMMAND, 2);
+	mpt->pci_cfg.LatencyTimer_LineSize =
+	    pci_read_config(mpt->dev, PCIR_CACHELNSZ, 2);
+	mpt->pci_cfg.IO_BAR = pci_read_config(mpt->dev, PCIR_MAPS, 4);
+	mpt->pci_cfg.Mem0_BAR[0] = pci_read_config(mpt->dev, PCIR_MAPS+0x4, 4);
+	mpt->pci_cfg.Mem0_BAR[1] = pci_read_config(mpt->dev, PCIR_MAPS+0x8, 4);
+	mpt->pci_cfg.Mem1_BAR[0] = pci_read_config(mpt->dev, PCIR_MAPS+0xC, 4);
+	mpt->pci_cfg.Mem1_BAR[1] = pci_read_config(mpt->dev, PCIR_MAPS+0x10, 4);
+	mpt->pci_cfg.ROM_BAR = pci_read_config(mpt->dev, PCIR_BIOS, 4);
+	mpt->pci_cfg.IntLine = pci_read_config(mpt->dev, PCIR_INTLINE, 1);
+	mpt->pci_cfg.PMCSR = pci_read_config(mpt->dev, 0x44, 4);
+}
+
+/* Sets modifiable config registers */
+void
+mpt_set_config_regs(mpt_softc_t *mpt)
+{
+	u_int32_t val;
+
+#define MPT_CHECK(reg, offset, size)					\
+	val = pci_read_config(mpt->dev, offset, size);			\
+	if (mpt->pci_cfg.reg != val) {					\
+		mpt_prt(mpt,						\
+		    "Restoring " #reg " to 0x%X from 0x%X\n",		\
+		    mpt->pci_cfg.reg, val);				\
+	}
+
+	if (mpt->verbose) {
+		MPT_CHECK(Command, PCIR_COMMAND, 2);
+		MPT_CHECK(LatencyTimer_LineSize, PCIR_CACHELNSZ, 2);
+		MPT_CHECK(IO_BAR, PCIR_MAPS, 4);
+		MPT_CHECK(Mem0_BAR[0], PCIR_MAPS+0x4, 4);
+		MPT_CHECK(Mem0_BAR[1], PCIR_MAPS+0x8, 4);
+		MPT_CHECK(Mem1_BAR[0], PCIR_MAPS+0xC, 4);
+		MPT_CHECK(Mem1_BAR[1], PCIR_MAPS+0x10, 4);
+		MPT_CHECK(ROM_BAR, PCIR_BIOS, 4);
+		MPT_CHECK(IntLine, PCIR_INTLINE, 1);
+		MPT_CHECK(PMCSR, 0x44, 4);
+	}
+#undef MPT_CHECK
+
+	pci_write_config(mpt->dev, PCIR_COMMAND, mpt->pci_cfg.Command, 2);
+	pci_write_config(mpt->dev, PCIR_CACHELNSZ,
+	    mpt->pci_cfg.LatencyTimer_LineSize, 2);
+	pci_write_config(mpt->dev, PCIR_MAPS, mpt->pci_cfg.IO_BAR, 4);
+	pci_write_config(mpt->dev, PCIR_MAPS+0x4, mpt->pci_cfg.Mem0_BAR[0], 4);
+	pci_write_config(mpt->dev, PCIR_MAPS+0x8, mpt->pci_cfg.Mem0_BAR[1], 4);
+	pci_write_config(mpt->dev, PCIR_MAPS+0xC, mpt->pci_cfg.Mem1_BAR[0], 4);
+	pci_write_config(mpt->dev, PCIR_MAPS+0x10, mpt->pci_cfg.Mem1_BAR[1], 4);
+	pci_write_config(mpt->dev, PCIR_BIOS, mpt->pci_cfg.ROM_BAR, 4);
+	pci_write_config(mpt->dev, PCIR_INTLINE, mpt->pci_cfg.IntLine, 1);
+	pci_write_config(mpt->dev, 0x44, mpt->pci_cfg.PMCSR, 4);
+}
+
+static void
+mpt_pci_intr(void *arg)
+{
+	mpt_softc_t *mpt = arg;
+	MPT_LOCK(mpt);
+	(void) mpt_intr(mpt);
+	MPT_UNLOCK(mpt);
+}