freebsd-dev/sys/dev/dpt/dpt_isa.c
Scott Long f6b1c44d1f Mega busdma API commit.
Add two new arguments to bus_dma_tag_create(): lockfunc and lockfuncarg.
Lockfunc allows a driver to provide a function for managing its locking
semantics while using busdma.  At the moment, this is used for the
asynchronous busdma_swi and callback mechanism.  Two lockfunc implementations
are provided: busdma_lock_mutex() performs standard mutex operations on the
mutex that is specified from lockfuncarg.  dftl_lock() is a panic
implementation and is defaulted to when NULL, NULL are passed to
bus_dma_tag_create().  The only time that NULL, NULL should ever be used is
when the driver ensures that bus_dmamap_load() will not be deferred.
Drivers that do not provide their own locking can pass
busdma_lock_mutex,&Giant args in order to preserve the former behaviour.

sparc64 and powerpc do not provide real busdma_swi functions, so this is
largely a noop on those platforms.  The busdma_swi on is64 is not properly
locked yet, so warnings will be emitted on this platform when busdma
callback deferrals happen.

If anyone gets panics or warnings from dflt_lock() being called, please
let me know right away.

Reviewed by:	tmm, gibbs
2003-07-01 15:52:06 +00:00

270 lines
5.8 KiB
C

/*-
* Copyright (c) 2000 Matthew N. Dodd <winter@jurai.net>
* 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.
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.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 <cam/scsi/scsi_all.h>
#include <dev/dpt/dpt.h>
#ifdef notyet
static void dpt_isa_identify (driver_t *, device_t);
#endif
static int dpt_isa_probe (device_t);
static int dpt_isa_attach (device_t);
static int dpt_isa_detach (device_t);
static int dpt_isa_valid_irq (int);
static int dpt_isa_valid_ioport (int);
static int
dpt_isa_valid_irq (int irq)
{
switch (irq) {
case 11:
case 12:
case 14:
case 15:
return (0);
default:
return (1);
};
return (1);
}
static int
dpt_isa_valid_ioport (int ioport)
{
switch (ioport) {
case 0x170:
case 0x1f0:
case 0x230:
case 0x330:
return (0);
default:
return (1);
};
return (1);
}
#ifdef notyet
static void
dpt_isa_identify (driver_t *driver, device_t parent)
{
device_t child;
dpt_conf_t * conf;
int isa_bases[] = { 0x1f0, 0x170, 0x330, 0x230, 0 };
int i;
for (i = 0; isa_bases[i]; i++) {
conf = dpt_pio_get_conf(isa_bases[i]);
if (!conf) {
if (bootverbose)
device_printf(parent, "dpt: dpt_pio_get_conf(%x) failed.\n",
isa_bases[i]);
continue;
}
child = BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, "dpt", -1);
if (child == 0) {
device_printf(parent, "dpt: BUS_ADD_CHILD() failed!\n");
continue;
}
device_set_driver(child, driver);
bus_set_resource(child, SYS_RES_IOPORT, 0, isa_bases[i], 0x9);
}
return;
}
#endif
static int
dpt_isa_probe (device_t dev)
{
dpt_conf_t * conf;
u_int32_t io_base;
/* No pnp support */
if (isa_get_vendorid(dev))
return (ENXIO);
if ((io_base = bus_get_resource_start(dev, SYS_RES_IOPORT, 0)) == 0)
return (ENXIO);
if (dpt_isa_valid_ioport(io_base))
;
conf = dpt_pio_get_conf(io_base);
if (!conf) {
printf("dpt: dpt_pio_get_conf() failed.\n");
return (ENXIO);
}
if (dpt_isa_valid_irq(conf->IRQ))
;
device_set_desc(dev, "ISA DPT SCSI controller");
bus_set_resource(dev, SYS_RES_IRQ, 0, conf->IRQ, 1);
bus_set_resource(dev, SYS_RES_DRQ, 0, ((8 - conf->DMA_channel) & 7), 1);
return 0;
}
static int
dpt_isa_attach (device_t dev)
{
dpt_softc_t * dpt;
int s;
int error = 0;
dpt = device_get_softc(dev);
dpt->io_rid = 0;
dpt->io_type = SYS_RES_IOPORT;
dpt->irq_rid = 0;
error = dpt_alloc_resources(dev);
if (error) {
goto bad;
}
dpt->drq_rid = 0;
dpt->drq_res = bus_alloc_resource(dev, SYS_RES_DRQ, &dpt->drq_rid,
0, ~0, 1, RF_ACTIVE);
if (!dpt->drq_res) {
device_printf(dev, "No DRQ!\n");
error = ENOMEM;
goto bad;
}
isa_dma_acquire(rman_get_start(dpt->drq_res));
isa_dmacascade(rman_get_start(dpt->drq_res));
dpt_alloc(dev);
/* Allocate a dmatag representing the capabilities of this attachment */
if (bus_dma_tag_create( /* parent */ NULL,
/* alignemnt */ 1,
/* boundary */ 0,
/* lowaddr */ BUS_SPACE_MAXADDR_32BIT,
/* highaddr */ BUS_SPACE_MAXADDR,
/* filter */ NULL,
/* filterarg */ NULL,
/* maxsize */ BUS_SPACE_MAXSIZE_32BIT,
/* nsegments */ ~0,
/* maxsegsz */ BUS_SPACE_MAXSIZE_32BIT,
/* flags */ 0,
/* lockfunc */ busdma_lock_mutex,
/* lockarg */ &Giant,
&dpt->parent_dmat) != 0) {
error = ENXIO;
goto bad;
}
s = splcam();
if (dpt_init(dpt) != 0) {
splx(s);
error = ENXIO;
goto bad;
}
/* Register with the XPT */
dpt_attach(dpt);
splx(s);
if (bus_setup_intr(dev, dpt->irq_res, INTR_TYPE_CAM | INTR_ENTROPY,
dpt_intr, dpt, &dpt->ih)) {
device_printf(dev, "Unable to register interrupt handler\n");
error = ENXIO;
goto bad;
}
return (error);
bad:
if (dpt->drq_res) {
isa_dma_release(rman_get_start(dpt->drq_res));
}
dpt_release_resources(dev);
if (dpt)
dpt_free(dpt);
return (error);
}
static int
dpt_isa_detach (device_t dev)
{
dpt_softc_t * dpt;
int dma;
int error;
dpt = device_get_softc(dev);
dma = rman_get_start(dpt->drq_res);
error = dpt_detach(dev);
isa_dma_release(dma);
return (error);
}
static device_method_t dpt_isa_methods[] = {
/* Device interface */
#ifdef notyet
DEVMETHOD(device_identify, dpt_isa_identify),
#endif
DEVMETHOD(device_probe, dpt_isa_probe),
DEVMETHOD(device_attach, dpt_isa_attach),
DEVMETHOD(device_detach, dpt_isa_detach),
{ 0, 0 }
};
static driver_t dpt_isa_driver = {
"dpt",
dpt_isa_methods,
sizeof(dpt_softc_t),
};
DRIVER_MODULE(dpt, isa, dpt_isa_driver, dpt_devclass, 0, 0);