freebsd-dev/sys/dev/dpt/dpt_eisa.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

215 lines
5.5 KiB
C

/*-
* Copyright (c) 1997, 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/lock.h>
#include <sys/mutex.h>
#include <sys/bus.h>
#include <machine/bus_pio.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/rman.h>
#include <dev/eisa/eisaconf.h>
#include <cam/scsi/scsi_all.h>
#include <dev/dpt/dpt.h>
#define DPT_EISA_IOSIZE 0x9
#define DPT_EISA_SLOT_OFFSET 0x0c00
#define DPT_EISA_EATA_REG_OFFSET 0x0088
#define DPT_EISA_DPT2402 0x12142402 /* DPT PM2012A/9X */
#define DPT_EISA_DPTA401 0x1214A401 /* DPT PM2012B/9X */
#define DPT_EISA_DPTA402 0x1214A402 /* DPT PM2012B2/9X */
#define DPT_EISA_DPTA410 0x1214A410 /* DPT PM2x22A/9X */
#define DPT_EISA_DPTA411 0x1214A411 /* DPT Spectre */
#define DPT_EISA_DPTA412 0x1214A412 /* DPT PM2021A/9X */
#define DPT_EISA_DPTA420 0x1214A420 /* DPT Smart Cache IV (PM2042) */
#define DPT_EISA_DPTA501 0x1214A501 /* DPT PM2012B1/9X" */
#define DPT_EISA_DPTA502 0x1214A502 /* DPT PM2012Bx/9X */
#define DPT_EISA_DPTA701 0x1214A701 /* DPT PM2011B1/9X */
#define DPT_EISA_DPTBC01 0x1214BC01 /* DPT PM3011/7X ESDI */
#define DPT_EISA_DPT8200 0x12148200 /* NEC EATA SCSI */
#define DPT_EISA_DPT2408 0x12142408 /* ATT EATA SCSI */
/* Function Prototypes */
static const char * dpt_eisa_match (eisa_id_t);
static int dpt_eisa_probe (device_t);
static int dpt_eisa_attach (device_t);
static int
dpt_eisa_probe (device_t dev)
{
const char * desc;
u_int32_t io_base;
dpt_conf_t * conf;
desc = dpt_eisa_match(eisa_get_id(dev));
if (!desc)
return (ENXIO);
device_set_desc(dev, desc);
io_base = (eisa_get_slot(dev) * EISA_SLOT_SIZE) +
DPT_EISA_SLOT_OFFSET +
DPT_EISA_EATA_REG_OFFSET;
conf = dpt_pio_get_conf(io_base);
if (!conf) {
printf("dpt: dpt_pio_get_conf() failed.\n");
return (ENXIO);
}
eisa_add_iospace(dev, io_base, DPT_EISA_IOSIZE, RESVADDR_NONE);
eisa_add_intr(dev, conf->IRQ,
(conf->IRQ_TR ? EISA_TRIGGER_LEVEL : EISA_TRIGGER_EDGE));
return 0;
}
static int
dpt_eisa_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_alloc(dev);
/* Allocate a dmatag representing the capabilities of this attachment */
/* XXX Should be a child of the EISA bus dma tag */
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:
dpt_release_resources(dev);
if (dpt)
dpt_free(dpt);
return (error);
}
static const char *
dpt_eisa_match(type)
eisa_id_t type;
{
switch (type) {
case DPT_EISA_DPT2402:
case DPT_EISA_DPTA401:
case DPT_EISA_DPTA402:
case DPT_EISA_DPTA410:
case DPT_EISA_DPTA411:
case DPT_EISA_DPTA412:
case DPT_EISA_DPTA420:
case DPT_EISA_DPTA501:
case DPT_EISA_DPTA502:
case DPT_EISA_DPTA701:
case DPT_EISA_DPTBC01:
case DPT_EISA_DPT8200:
case DPT_EISA_DPT2408:
return ("DPT SCSI Host Bus Adapter");
break;
default:
break;
}
return (NULL);
}
static device_method_t dpt_eisa_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, dpt_eisa_probe),
DEVMETHOD(device_attach, dpt_eisa_attach),
DEVMETHOD(device_detach, dpt_detach),
{ 0, 0 }
};
static driver_t dpt_eisa_driver = {
"dpt",
dpt_eisa_methods,
sizeof(dpt_softc_t),
};
DRIVER_MODULE(dpt, eisa, dpt_eisa_driver, dpt_devclass, 0, 0);