f6b1c44d1f
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
217 lines
5.7 KiB
C
217 lines
5.7 KiB
C
/*
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* FreeBSD, EISA product support functions
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*
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*
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* Copyright (c) 1994-1998, 2000, 2001 Justin T. Gibbs.
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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 immediately at the beginning of the file, without modification,
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* this list of conditions, and the following disclaimer.
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* 2. 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 AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: ahc_eisa.c,v 1.29 2003/05/03 23:27:57 gibbs Exp $
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*
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* $FreeBSD$
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*/
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#include <dev/aic7xxx/aic7xxx_osm.h>
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#include <dev/eisa/eisaconf.h>
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static int
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aic7770_probe(device_t dev)
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{
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struct aic7770_identity *entry;
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struct resource *regs;
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uint32_t iobase;
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bus_space_handle_t bsh;
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bus_space_tag_t tag;
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u_int irq;
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u_int intdef;
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u_int hcntrl;
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int shared;
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int rid;
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int error;
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entry = aic7770_find_device(eisa_get_id(dev));
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if (entry == NULL)
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return (ENXIO);
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device_set_desc(dev, entry->name);
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iobase = (eisa_get_slot(dev) * EISA_SLOT_SIZE) + AHC_EISA_SLOT_OFFSET;
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eisa_add_iospace(dev, iobase, AHC_EISA_IOSIZE, RESVADDR_NONE);
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rid = 0;
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regs = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
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0, ~0, 1, RF_ACTIVE);
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if (regs == NULL) {
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device_printf(dev, "Unable to map I/O space?!\n");
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return ENOMEM;
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}
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tag = rman_get_bustag(regs);
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bsh = rman_get_bushandle(regs);
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error = 0;
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/* Pause the card preseving the IRQ type */
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hcntrl = bus_space_read_1(tag, bsh, HCNTRL) & IRQMS;
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bus_space_write_1(tag, bsh, HCNTRL, hcntrl | PAUSE);
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while ((bus_space_read_1(tag, bsh, HCNTRL) & PAUSE) == 0)
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;
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/* Make sure we have a valid interrupt vector */
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intdef = bus_space_read_1(tag, bsh, INTDEF);
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shared = (intdef & EDGE_TRIG) ? EISA_TRIGGER_EDGE : EISA_TRIGGER_LEVEL;
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irq = intdef & VECTOR;
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switch (irq) {
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case 9:
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case 10:
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case 11:
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case 12:
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case 14:
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case 15:
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break;
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default:
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printf("aic7770 at slot %d: illegal irq setting %d\n",
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eisa_get_slot(dev), intdef);
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error = ENXIO;
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}
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if (error == 0)
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eisa_add_intr(dev, irq, shared);
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bus_release_resource(dev, SYS_RES_IOPORT, rid, regs);
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return (error);
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}
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static int
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aic7770_attach(device_t dev)
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{
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struct aic7770_identity *entry;
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struct ahc_softc *ahc;
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char *name;
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int error;
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entry = aic7770_find_device(eisa_get_id(dev));
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if (entry == NULL)
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return (ENXIO);
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/*
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* Allocate a softc for this card and
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* set it up for attachment by our
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* common detect routine.
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*/
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name = malloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_NOWAIT);
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if (name == NULL)
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return (ENOMEM);
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strcpy(name, device_get_nameunit(dev));
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ahc = ahc_alloc(dev, name);
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if (ahc == NULL)
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return (ENOMEM);
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ahc_set_unit(ahc, device_get_unit(dev));
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/* Allocate a dmatag for our SCB DMA maps */
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/* XXX Should be a child of the PCI bus dma tag */
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error = bus_dma_tag_create(/*parent*/NULL, /*alignment*/1,
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/*boundary*/0,
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/*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
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/*highaddr*/BUS_SPACE_MAXADDR,
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/*filter*/NULL, /*filterarg*/NULL,
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/*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
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/*nsegments*/AHC_NSEG,
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/*maxsegsz*/AHC_MAXTRANSFER_SIZE,
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/*flags*/0,
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/*lockfunc*/busdma_lock_mutex,
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/*lockarg*/&Giant,
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&ahc->parent_dmat);
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if (error != 0) {
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printf("ahc_eisa_attach: Could not allocate DMA tag "
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"- error %d\n", error);
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ahc_free(ahc);
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return (ENOMEM);
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}
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ahc->dev_softc = dev;
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error = aic7770_config(ahc, entry, /*unused ioport arg*/0);
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if (error != 0) {
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ahc_free(ahc);
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return (error);
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}
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ahc_attach(ahc);
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return (0);
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}
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int
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aic7770_map_registers(struct ahc_softc *ahc, u_int unused_ioport_arg)
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{
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struct resource *regs;
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int rid;
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rid = 0;
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regs = bus_alloc_resource(ahc->dev_softc, SYS_RES_IOPORT,
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&rid, 0, ~0, 1, RF_ACTIVE);
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if (regs == NULL) {
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device_printf(ahc->dev_softc, "Unable to map I/O space?!\n");
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return ENOMEM;
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}
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ahc->platform_data->regs_res_type = SYS_RES_IOPORT;
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ahc->platform_data->regs_res_id = rid,
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ahc->platform_data->regs = regs;
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ahc->tag = rman_get_bustag(regs);
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ahc->bsh = rman_get_bushandle(regs);
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return (0);
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}
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int
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aic7770_map_int(struct ahc_softc *ahc, int irq)
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{
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int zero;
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zero = 0;
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ahc->platform_data->irq =
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bus_alloc_resource(ahc->dev_softc, SYS_RES_IRQ, &zero,
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0, ~0, 1, RF_ACTIVE);
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if (ahc->platform_data->irq == NULL)
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return (ENOMEM);
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ahc->platform_data->irq_res_type = SYS_RES_IRQ;
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return (ahc_map_int(ahc));
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}
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static device_method_t ahc_eisa_device_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, aic7770_probe),
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DEVMETHOD(device_attach, aic7770_attach),
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DEVMETHOD(device_detach, ahc_detach),
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{ 0, 0 }
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};
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static driver_t ahc_eisa_driver = {
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"ahc",
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ahc_eisa_device_methods,
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sizeof(struct ahc_softc)
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};
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DRIVER_MODULE(ahc_eisa, eisa, ahc_eisa_driver, ahc_devclass, 0, 0);
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MODULE_DEPEND(ahc_eisa, ahc, 1, 1, 1);
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MODULE_VERSION(ahc_eisa, 1);
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