1 files changed, 535 insertions, 0 deletions

diff --git a/sys/dev/ida/ida.c b/sys/dev/ida/ida.c
new file mode 100644
index 0000000..39369ea
--- /dev/null
+++ b/sys/dev/ida/ida.c
@@ -0,0 +1,535 @@
+/*-
+ * Copyright (c) 1999,2000 Jonathan Lemon
+ * All rights reserved.
+ *
+ # Derived from the original IDA Compaq RAID driver, which is
+ * Copyright (c) 1996, 1997, 1998, 1999
+ *    Mark Dawson and David James. 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.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+/*
+ * Generic driver for Compaq SMART RAID adapters.
+ *
+ * Specific probe routines are in:
+ *	pci/ida_pci.c		
+ *	i386/eisa/ida_eisa.c
+ */
+
+#include <sys/param.h>
+#include <sys/kernel.h>
+#include <sys/stdint.h>
+#include <sys/systm.h>
+#include <sys/malloc.h>
+
+#include <sys/bio.h>
+#include <sys/bus.h>
+#include <sys/devicestat.h>
+#include <sys/disk.h>
+
+#include <machine/bus_memio.h>
+#include <machine/bus_pio.h>
+#include <machine/bus.h>
+#include <sys/rman.h>
+
+#include <dev/ida/idareg.h>
+#include <dev/ida/idavar.h>
+
+/* prototypes */
+static void ida_alloc_qcb(struct ida_softc *ida);
+static void ida_construct_qcb(struct ida_softc *ida);
+static void ida_start(struct ida_softc *ida);
+static void ida_done(struct ida_softc *ida, struct ida_qcb *qcb);
+static int ida_wait(struct ida_softc *ida, struct ida_qcb *qcb);
+
+void
+ida_free(struct ida_softc *ida)
+{
+	int i;
+
+	for (i = 0; i < ida->num_qcbs; i++)
+		bus_dmamap_destroy(ida->buffer_dmat, ida->qcbs[i].dmamap);
+
+	if (ida->hwqcb_busaddr)
+		bus_dmamap_unload(ida->hwqcb_dmat, ida->hwqcb_dmamap);
+
+	if (ida->hwqcbs)
+		bus_dmamem_free(ida->hwqcb_dmat, ida->hwqcbs,
+		    ida->hwqcb_dmamap);
+
+	if (ida->buffer_dmat)
+		bus_dma_tag_destroy(ida->buffer_dmat);
+
+	if (ida->hwqcb_dmat)
+		bus_dma_tag_destroy(ida->hwqcb_dmat);
+
+	if (ida->qcbs != NULL)
+		free(ida->qcbs, M_DEVBUF);
+
+	if (ida->ih != NULL)
+                bus_teardown_intr(ida->dev, ida->irq, ida->ih);
+
+	if (ida->irq != NULL)
+		bus_release_resource(ida->dev, ida->irq_res_type,
+		    0, ida->irq);
+
+	if (ida->parent_dmat != NULL)
+		bus_dma_tag_destroy(ida->parent_dmat);
+
+	if (ida->regs != NULL)
+		bus_release_resource(ida->dev, ida->regs_res_type,
+		    ida->regs_res_id, ida->regs);
+}
+
+/*
+ * record bus address from bus_dmamap_load
+ */
+static void
+ida_dma_map_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error) 
+{
+        bus_addr_t *baddr;
+
+        baddr = (bus_addr_t *)arg;
+        *baddr = segs->ds_addr;
+}
+
+static __inline struct ida_qcb *
+ida_get_qcb(struct ida_softc *ida)
+{
+	struct ida_qcb *qcb;
+
+	if ((qcb = SLIST_FIRST(&ida->free_qcbs)) != NULL) {
+		SLIST_REMOVE_HEAD(&ida->free_qcbs, link.sle);
+	} else {
+		ida_alloc_qcb(ida);
+		if ((qcb = SLIST_FIRST(&ida->free_qcbs)) != NULL)
+			SLIST_REMOVE_HEAD(&ida->free_qcbs, link.sle);
+	}
+	return (qcb);
+}
+
+static __inline bus_addr_t
+idahwqcbvtop(struct ida_softc *ida, struct ida_hardware_qcb *hwqcb)
+{
+	return (ida->hwqcb_busaddr +
+	    ((bus_addr_t)hwqcb - (bus_addr_t)ida->hwqcbs));
+}
+
+static __inline struct ida_qcb *
+idahwqcbptov(struct ida_softc *ida, bus_addr_t hwqcb_addr)
+{
+	struct ida_hardware_qcb *hwqcb;
+
+	hwqcb = (struct ida_hardware_qcb *)
+	    ((bus_addr_t)ida->hwqcbs + (hwqcb_addr - ida->hwqcb_busaddr));
+	return (hwqcb->qcb);
+}
+
+/*
+ * XXX
+ * since we allocate all QCB space up front during initialization, then
+ * why bother with this routine?
+ */
+static void
+ida_alloc_qcb(struct ida_softc *ida)
+{
+	struct ida_qcb *qcb;
+	int error;
+
+	if (ida->num_qcbs >= IDA_QCB_MAX)
+		return;
+
+	qcb = &ida->qcbs[ida->num_qcbs];
+
+	error = bus_dmamap_create(ida->buffer_dmat, /*flags*/0, &qcb->dmamap);
+	if (error != 0)
+		return;
+
+	qcb->flags = QCB_FREE;
+	qcb->hwqcb = &ida->hwqcbs[ida->num_qcbs];
+	qcb->hwqcb->qcb = qcb;
+	qcb->hwqcb_busaddr = idahwqcbvtop(ida, qcb->hwqcb);
+	SLIST_INSERT_HEAD(&ida->free_qcbs, qcb, link.sle);
+	ida->num_qcbs++;
+}
+
+int
+ida_init(struct ida_softc *ida)
+{
+	int error;
+
+	ida->unit = device_get_unit(ida->dev);
+	ida->tag = rman_get_bustag(ida->regs);
+	ida->bsh = rman_get_bushandle(ida->regs);
+
+	SLIST_INIT(&ida->free_qcbs);
+	STAILQ_INIT(&ida->qcb_queue);
+        bioq_init(&ida->bio_queue);
+
+	ida->qcbs = (struct ida_qcb *)
+	    malloc(IDA_QCB_MAX * sizeof(struct ida_qcb), M_DEVBUF,
+		M_NOWAIT | M_ZERO);
+	if (ida->qcbs == NULL)
+		return (ENOMEM);
+
+	/*
+	 * Create our DMA tags
+	 */
+
+	/* DMA tag for our hardware QCB structures */
+	error = bus_dma_tag_create(ida->parent_dmat,
+	    /*alignment*/1, /*boundary*/0,
+	    /*lowaddr*/BUS_SPACE_MAXADDR, /*highaddr*/BUS_SPACE_MAXADDR,
+	    /*filter*/NULL, /*filterarg*/NULL,
+	    IDA_QCB_MAX * sizeof(struct ida_hardware_qcb),
+	    /*nsegments*/1, /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
+	    /*flags*/0, &ida->hwqcb_dmat);
+	if (error)
+                return (ENOMEM);
+
+	/* DMA tag for mapping buffers into device space */
+	error = bus_dma_tag_create(ida->parent_dmat,
+	    /*alignment*/1, /*boundary*/0,
+	    /*lowaddr*/BUS_SPACE_MAXADDR, /*highaddr*/BUS_SPACE_MAXADDR,
+	    /*filter*/NULL, /*filterarg*/NULL,
+	    /*maxsize*/MAXBSIZE, /*nsegments*/IDA_NSEG,
+	    /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT, /*flags*/0, &ida->buffer_dmat);
+	if (error)
+                return (ENOMEM);
+
+        /* Allocation of hardware QCBs */
+	/* XXX allocation is rounded to hardware page size */
+	error = bus_dmamem_alloc(ida->hwqcb_dmat,
+	    (void **)&ida->hwqcbs, BUS_DMA_NOWAIT, &ida->hwqcb_dmamap);
+	if (error)
+                return (ENOMEM);
+
+        /* And permanently map them in */
+        bus_dmamap_load(ida->hwqcb_dmat, ida->hwqcb_dmamap,
+	    ida->hwqcbs, IDA_QCB_MAX * sizeof(struct ida_hardware_qcb),
+	    ida_dma_map_cb, &ida->hwqcb_busaddr, /*flags*/0);
+
+	bzero(ida->hwqcbs, IDA_QCB_MAX * sizeof(struct ida_hardware_qcb));
+
+	ida_alloc_qcb(ida);		/* allocate an initial qcb */
+
+	return (0);
+}
+
+void
+ida_attach(struct ida_softc *ida)
+{
+	struct ida_controller_info cinfo;
+	int error, i;
+
+	ida->cmd.int_enable(ida, 0);
+
+	error = ida_command(ida, CMD_GET_CTRL_INFO, &cinfo, sizeof(cinfo),
+	    IDA_CONTROLLER, 0, DMA_DATA_IN);
+	if (error) {
+		device_printf(ida->dev, "CMD_GET_CTRL_INFO failed.\n");
+		return;
+	}
+
+	device_printf(ida->dev, "drives=%d firm_rev=%c%c%c%c\n",
+	    cinfo.num_drvs, cinfo.firm_rev[0], cinfo.firm_rev[1],
+	    cinfo.firm_rev[2], cinfo.firm_rev[3]);
+
+	if (ida->flags & IDA_FIRMWARE) {
+		int data;
+
+		error = ida_command(ida, CMD_START_FIRMWARE,
+		    &data, sizeof(data), IDA_CONTROLLER, 0, DMA_DATA_IN);
+		if (error) {
+			device_printf(ida->dev, "CMD_START_FIRMWARE failed.\n");
+			return;
+		}
+	}
+
+	ida->num_drives = 0;
+	for (i = 0; i < cinfo.num_drvs; i++)
+		device_add_child(ida->dev, /*"idad"*/NULL, -1);
+
+	bus_generic_attach(ida->dev);
+
+	ida->cmd.int_enable(ida, 1);
+}
+
+int
+ida_detach(device_t dev)
+{
+	struct ida_softc *ida;
+	int error = 0;
+
+        ida = (struct ida_softc *)device_get_softc(dev);
+
+	/*
+	 * XXX
+	 * before detaching, we must make sure that the system is 
+	 * quiescent; nothing mounted, no pending activity.
+	 */
+
+	/*
+	 * XXX
+	 * now, how are we supposed to maintain a list of our drives?
+	 * iterate over our "child devices"?
+	 */
+
+
+	ida_free(ida);
+	return (error);
+}
+
+static void
+ida_setup_dmamap(void *arg, bus_dma_segment_t *segs, int nsegments, int error)
+{
+	struct ida_hardware_qcb *hwqcb = (struct ida_hardware_qcb *)arg;
+	int i;
+
+	hwqcb->hdr.size = (sizeof(struct ida_req) + 
+	    sizeof(struct ida_sgb) * IDA_NSEG) >> 2;
+
+	for (i = 0; i < nsegments; i++) {
+		hwqcb->seg[i].addr = segs[i].ds_addr;
+		hwqcb->seg[i].length = segs[i].ds_len;
+	}
+	hwqcb->req.sgcount = nsegments;
+}
+
+int
+ida_command(struct ida_softc *ida, int command, void *data, int datasize,
+	int drive, u_int32_t pblkno, int flags)
+{
+	struct ida_hardware_qcb *hwqcb;
+	struct ida_qcb *qcb;
+	bus_dmasync_op_t op;
+	int s, error;
+
+	s = splbio();
+	qcb = ida_get_qcb(ida);
+	splx(s);
+
+	if (qcb == NULL) {
+		printf("ida_command: out of QCBs");
+		return (EAGAIN);
+	}
+
+	hwqcb = qcb->hwqcb;
+	bzero(hwqcb, sizeof(struct ida_hdr) + sizeof(struct ida_req));
+
+	bus_dmamap_load(ida->buffer_dmat, qcb->dmamap,
+	    (void *)data, datasize, ida_setup_dmamap, hwqcb, 0);
+	op = qcb->flags & DMA_DATA_IN ?
+	    BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE;
+	bus_dmamap_sync(ida->buffer_dmat, qcb->dmamap, op);
+
+	hwqcb->hdr.drive = drive;
+	hwqcb->req.blkno = pblkno;
+	hwqcb->req.bcount = howmany(datasize, DEV_BSIZE);
+	hwqcb->req.command = command;
+
+	qcb->flags = flags | IDA_COMMAND;
+
+	s = splbio();
+	STAILQ_INSERT_TAIL(&ida->qcb_queue, qcb, link.stqe);
+	ida_start(ida);
+	error = ida_wait(ida, qcb);
+	splx(s);
+
+	/* XXX should have status returned here? */
+	/* XXX have "status pointer" area in QCB? */
+
+	return (error);
+}
+
+void
+ida_submit_buf(struct ida_softc *ida, struct bio *bp)
+{
+        bioq_insert_tail(&ida->bio_queue, bp);
+        ida_construct_qcb(ida);
+	ida_start(ida);
+}
+
+static void
+ida_construct_qcb(struct ida_softc *ida)
+{
+	struct ida_hardware_qcb *hwqcb;
+	struct ida_qcb *qcb;
+	bus_dmasync_op_t op;
+	struct bio *bp;
+
+	bp = bioq_first(&ida->bio_queue);
+	if (bp == NULL)
+		return;				/* no more buffers */
+
+	qcb = ida_get_qcb(ida);
+	if (qcb == NULL)
+		return;				/* out of resources */
+
+	bioq_remove(&ida->bio_queue, bp);
+	qcb->buf = bp;
+	qcb->flags = 0;
+
+	hwqcb = qcb->hwqcb;
+	bzero(hwqcb, sizeof(struct ida_hdr) + sizeof(struct ida_req));
+
+	bus_dmamap_load(ida->buffer_dmat, qcb->dmamap,
+	    (void *)bp->bio_data, bp->bio_bcount, ida_setup_dmamap, hwqcb, 0);
+	op = qcb->flags & DMA_DATA_IN ?
+	    BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE;
+	bus_dmamap_sync(ida->buffer_dmat, qcb->dmamap, op);
+
+	{
+		struct idad_softc *drv = (struct idad_softc *)bp->bio_driver1;
+		hwqcb->hdr.drive = drv->drive;
+	}
+
+	hwqcb->req.blkno = bp->bio_pblkno;
+	hwqcb->req.bcount = howmany(bp->bio_bcount, DEV_BSIZE);
+	hwqcb->req.command = bp->bio_cmd == BIO_READ ? CMD_READ : CMD_WRITE;
+
+	STAILQ_INSERT_TAIL(&ida->qcb_queue, qcb, link.stqe);
+}
+
+/*
+ * This routine will be called from ida_intr in order to queue up more
+ * I/O, meaning that we may be in an interrupt context.  Hence, we should
+ * not muck around with spl() in this routine.
+ */
+static void
+ida_start(struct ida_softc *ida)
+{
+	struct ida_qcb *qcb;
+
+	while ((qcb = STAILQ_FIRST(&ida->qcb_queue)) != NULL) {
+		if (ida->cmd.fifo_full(ida))
+			break;
+		STAILQ_REMOVE_HEAD(&ida->qcb_queue, link.stqe);
+		/*
+		 * XXX
+		 * place the qcb on an active list and set a timeout?
+		 */
+		qcb->state = QCB_ACTIVE;
+		ida->cmd.submit(ida, qcb);
+	}
+}
+
+static int
+ida_wait(struct ida_softc *ida, struct ida_qcb *qcb)
+{
+	struct ida_qcb *qcb_done = NULL;
+	bus_addr_t completed;
+	int delay;
+
+	if (ida->flags & IDA_INTERRUPTS) {
+		if (tsleep((caddr_t)qcb, PRIBIO, "idacmd", 5 * hz))
+			return (ETIMEDOUT);
+		return (0);
+	}
+
+again:
+	delay = 5 * 1000 * 100;			/* 5 sec delay */
+	while ((completed = ida->cmd.done(ida)) == 0) {
+		if (delay-- == 0)
+			return (ETIMEDOUT);
+		DELAY(10);
+	}
+
+	qcb_done = idahwqcbptov(ida, completed & ~3);
+	if (qcb_done != qcb)
+		goto again;
+	ida_done(ida, qcb);
+	return (0);
+}
+
+void
+ida_intr(void *data)
+{
+	struct ida_softc *ida;
+	struct ida_qcb *qcb;
+	bus_addr_t completed;
+
+	ida = (struct ida_softc *)data;
+
+	if (ida->cmd.int_pending(ida) == 0)
+		return;				/* not our interrupt */
+
+	while ((completed = ida->cmd.done(ida)) != 0) {
+		qcb = idahwqcbptov(ida, completed & ~3);
+
+		if (qcb == NULL || qcb->state != QCB_ACTIVE) {
+			device_printf(ida->dev,
+			    "ignoring completion %jx\n", (intmax_t)completed);
+			continue;
+		}
+		ida_done(ida, qcb);
+	}
+	ida_start(ida);
+}
+
+/*
+ * should switch out command type; may be status, not just I/O.
+ */
+static void
+ida_done(struct ida_softc *ida, struct ida_qcb *qcb)
+{
+	int error = 0;
+
+	/*
+	 * finish up command
+	 */
+	if (qcb->flags & DMA_DATA_TRANSFER) {
+		bus_dmasync_op_t op;
+
+		op = qcb->flags & DMA_DATA_IN ?
+		    BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE;
+		bus_dmamap_sync(ida->buffer_dmat, qcb->dmamap, op);
+		bus_dmamap_unload(ida->buffer_dmat, qcb->dmamap);
+	}
+
+	if (qcb->hwqcb->req.error & SOFT_ERROR)
+		device_printf(ida->dev, "soft error\n");
+	if (qcb->hwqcb->req.error & HARD_ERROR) {
+		error = 1;
+		device_printf(ida->dev, "hard error\n");
+	}
+	if (qcb->hwqcb->req.error & CMD_REJECTED) {
+		error = 1;
+		device_printf(ida->dev, "invalid request\n");
+	}
+
+	if (qcb->flags & IDA_COMMAND) {
+		if (ida->flags & IDA_INTERRUPTS)
+			wakeup(qcb);
+	} else {
+		if (error)
+			qcb->buf->bio_flags |= BIO_ERROR;
+		idad_intr(qcb->buf);
+	}
+
+	qcb->state = QCB_FREE;
+	SLIST_INSERT_HEAD(&ida->free_qcbs, qcb, link.sle);
+	ida_construct_qcb(ida);
+}