894449cd93
This gives +10% performance on simple tests, so definitly worth it. A few percent more could be had by not using M_ZERO'd alloc's, but we then need to clear fields all over the place to be safe, and that was deemed not worth the trouble (and it makes life dangerous).
329 lines
9.5 KiB
C
329 lines
9.5 KiB
C
/*-
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* Copyright (c) 2002 - 2004 Søren Schmidt <sos@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer,
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* without modification, immediately at the beginning of the file.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_ata.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/ata.h>
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#include <sys/bus.h>
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#include <sys/malloc.h>
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#include <sys/sema.h>
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#include <sys/taskqueue.h>
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#include <vm/uma.h>
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#include <machine/resource.h>
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#include <machine/bus.h>
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#include <sys/rman.h>
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#include <isa/isavar.h>
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#include <dev/ata/ata-all.h>
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/* local vars */
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struct ata_cbus_controller {
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struct resource *io;
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struct resource *altio;
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struct resource *bankio;
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struct resource *irq;
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void *ih;
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void (*setmode)(struct ata_device *, int);
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void (*locking)(struct ata_channel *, int);
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int current_bank;
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struct {
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void (*function)(void *);
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void *argument;
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} interrupt[2];
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};
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/* local prototypes */
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static void ata_cbus_intr(void *);
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static void ata_cbus_banking(struct ata_channel *, int);
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static void ata_cbus_setmode(struct ata_device *, int);
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static int
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ata_cbus_probe(device_t dev)
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{
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struct resource *io;
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int rid;
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u_long tmp;
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/* dont probe PnP devices */
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if (isa_get_vendorid(dev))
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return (ENXIO);
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/* allocate the ioport range */
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rid = ATA_IOADDR_RID;
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io = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0,
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ATA_PC98_IOSIZE, RF_ACTIVE);
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if (!io)
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return ENOMEM;
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/* calculate & set the altport range */
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rid = ATA_PC98_ALTADDR_RID;
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if (bus_get_resource(dev, SYS_RES_IOPORT, rid, &tmp, &tmp)) {
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bus_set_resource(dev, SYS_RES_IOPORT, rid,
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rman_get_start(io)+ATA_PC98_ALTOFFSET, ATA_ALTIOSIZE);
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}
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/* calculate & set the bank range */
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rid = ATA_PC98_BANKADDR_RID;
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if (bus_get_resource(dev, SYS_RES_IOPORT, rid, &tmp, &tmp)) {
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bus_set_resource(dev, SYS_RES_IOPORT, rid,
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ATA_PC98_BANK, ATA_PC98_BANKIOSIZE);
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}
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bus_release_resource(dev, SYS_RES_IOPORT, ATA_IOADDR_RID, io);
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return 0;
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}
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static int
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ata_cbus_attach(device_t dev)
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{
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struct ata_cbus_controller *ctlr = device_get_softc(dev);
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int rid;
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/* allocate resources */
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rid = ATA_IOADDR_RID;
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ctlr->io = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0,
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ATA_PC98_IOSIZE, RF_ACTIVE);
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if (!ctlr->io)
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return ENOMEM;
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rid = ATA_PC98_ALTADDR_RID;
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ctlr->altio =
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bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
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rman_get_start(ctlr->io) + ATA_PC98_ALTOFFSET, ~0,
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ATA_ALTIOSIZE, RF_ACTIVE);
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if (!ctlr->altio) {
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bus_release_resource(dev, SYS_RES_IOPORT, ATA_IOADDR_RID, ctlr->io);
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return ENOMEM;
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}
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rid = ATA_PC98_BANKADDR_RID;
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ctlr->bankio = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
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ATA_PC98_BANK, ~0,
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ATA_PC98_BANKIOSIZE, RF_ACTIVE);
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if (!ctlr->bankio) {
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bus_release_resource(dev, SYS_RES_IOPORT, ATA_IOADDR_RID, ctlr->io);
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bus_release_resource(dev, SYS_RES_IOPORT, ATA_ALTADDR_RID, ctlr->altio);
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return ENOMEM;
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}
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rid = ATA_IRQ_RID;
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if (!(ctlr->irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid,
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0, ~0, 1, RF_ACTIVE | RF_SHAREABLE))) {
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device_printf(dev, "unable to alloc interrupt\n");
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bus_release_resource(dev, SYS_RES_IOPORT, ATA_IOADDR_RID, ctlr->io);
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bus_release_resource(dev, SYS_RES_IOPORT, ATA_ALTADDR_RID, ctlr->altio);
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bus_release_resource(dev, SYS_RES_IOPORT,
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ATA_PC98_BANKADDR_RID, ctlr->bankio);
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return ENXIO;
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}
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if ((bus_setup_intr(dev, ctlr->irq, ATA_INTR_FLAGS,
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ata_cbus_intr, ctlr, &ctlr->ih))) {
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device_printf(dev, "unable to setup interrupt\n");
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bus_release_resource(dev, SYS_RES_IOPORT, ATA_IOADDR_RID, ctlr->io);
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bus_release_resource(dev, SYS_RES_IOPORT, ATA_ALTADDR_RID, ctlr->altio);
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bus_release_resource(dev, SYS_RES_IOPORT,
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ATA_PC98_BANKADDR_RID, ctlr->bankio);
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bus_release_resource(dev, SYS_RES_IOPORT, ATA_IRQ_RID, ctlr->irq);
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return ENXIO;
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}
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ctlr->locking = ata_cbus_banking;
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ctlr->current_bank = -1;
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ctlr->setmode = ata_cbus_setmode;;
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if (!device_add_child(dev, "ata", 0))
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return ENOMEM;
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if (!device_add_child(dev, "ata", 1))
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return ENOMEM;
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return bus_generic_attach(dev);
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}
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static struct resource *
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ata_cbus_alloc_resource(device_t dev, device_t child, int type, int *rid,
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u_long start, u_long end, u_long count, u_int flags)
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{
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struct ata_cbus_controller *ctlr = device_get_softc(dev);
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if (type == SYS_RES_IOPORT) {
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switch (*rid) {
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case ATA_IOADDR_RID:
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return ctlr->io;
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case ATA_ALTADDR_RID:
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return ctlr->altio;
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}
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}
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if (type == SYS_RES_IRQ)
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return ctlr->irq;
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return 0;
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}
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static int
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ata_cbus_setup_intr(device_t dev, device_t child, struct resource *irq,
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int flags, driver_intr_t *intr, void *arg,
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void **cookiep)
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{
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struct ata_cbus_controller *controller = device_get_softc(dev);
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int unit = ((struct ata_channel *)device_get_softc(child))->unit;
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controller->interrupt[unit].function = intr;
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controller->interrupt[unit].argument = arg;
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*cookiep = controller;
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return 0;
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}
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static int
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ata_cbus_print_child(device_t dev, device_t child)
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{
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struct ata_channel *ch = device_get_softc(child);
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int retval = 0;
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retval += bus_print_child_header(dev, child);
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retval += printf(" at bank %d", ch->unit);
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retval += bus_print_child_footer(dev, child);
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return retval;
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}
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static void
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ata_cbus_intr(void *data)
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{
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struct ata_cbus_controller *ctlr = data;
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if (ctlr->current_bank != -1 &&
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ctlr->interrupt[ctlr->current_bank].argument)
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ctlr->interrupt[ctlr->current_bank].
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function(ctlr->interrupt[ctlr->current_bank].argument);
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}
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static void
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ata_cbus_banking(struct ata_channel *ch, int flags)
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{
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struct ata_cbus_controller *ctlr =
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device_get_softc(device_get_parent(ch->dev));
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switch (flags) {
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case ATA_LF_LOCK:
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if (ctlr->current_bank == ch->unit)
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break;
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while (!atomic_cmpset_acq_int(&ctlr->current_bank, -1, ch->unit))
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tsleep((caddr_t)ch->locking, PRIBIO, "atabnk", 1);
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ATA_OUTB(ctlr->bankio, 0, ch->unit);
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break;
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case ATA_LF_UNLOCK:
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if (ctlr->current_bank == -1 || ctlr->current_bank != ch->unit)
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break;
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atomic_store_rel_int(&ctlr->current_bank, -1);
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break;
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}
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return;
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}
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static void
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ata_cbus_setmode(struct ata_device *atadev, int mode)
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{
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atadev->mode = ata_limit_mode(atadev, mode, ATA_PIO_MAX);
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}
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static device_method_t ata_cbus_methods[] = {
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/* device_interface */
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DEVMETHOD(device_probe, ata_cbus_probe),
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DEVMETHOD(device_attach, ata_cbus_attach),
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/* bus methods */
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DEVMETHOD(bus_alloc_resource, ata_cbus_alloc_resource),
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DEVMETHOD(bus_setup_intr, ata_cbus_setup_intr),
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DEVMETHOD(bus_print_child, ata_cbus_print_child),
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{ 0, 0 }
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};
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static driver_t ata_cbus_driver = {
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"atacbus",
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ata_cbus_methods,
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sizeof(struct ata_cbus_controller),
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};
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static devclass_t ata_cbus_devclass;
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DRIVER_MODULE(atacbus, isa, ata_cbus_driver, ata_cbus_devclass, 0, 0);
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static int
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ata_cbussub_probe(device_t dev)
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{
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struct ata_cbus_controller *ctlr = device_get_softc(device_get_parent(dev));
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struct ata_channel *ch = device_get_softc(dev);
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device_t *children;
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int count, i;
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/* find channel number on this controller */
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device_get_children(device_get_parent(dev), &children, &count);
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for (i = 0; i < count; i++) {
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if (children[i] == dev)
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ch->unit = i;
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}
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free(children, M_TEMP);
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/* setup the resource vectors */
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for (i = ATA_DATA; i <= ATA_STATUS; i ++) {
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ch->r_io[i].res = ctlr->io;
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ch->r_io[i].offset = i << 1;
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}
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ch->r_io[ATA_ALTSTAT].res = ctlr->altio;
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ch->r_io[ATA_ALTSTAT].offset = 0;
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/* initialize softc for this channel */
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ch->flags |= ATA_USE_16BIT | ATA_USE_PC98GEOM;
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ch->locking = ctlr->locking;
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ch->device[MASTER].setmode = ctlr->setmode;
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ch->device[SLAVE].setmode = ctlr->setmode;
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return ata_probe(dev);
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}
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static device_method_t ata_cbussub_methods[] = {
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/* device interface */
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DEVMETHOD(device_probe, ata_cbussub_probe),
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DEVMETHOD(device_attach, ata_attach),
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DEVMETHOD(device_detach, ata_detach),
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DEVMETHOD(device_resume, ata_resume),
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{ 0, 0 }
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};
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static driver_t ata_cbussub_driver = {
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"ata",
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ata_cbussub_methods,
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sizeof(struct ata_channel),
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};
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DRIVER_MODULE(ata, atacbus, ata_cbussub_driver, ata_devclass, 0, 0);
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