67fb10f30c
It exposes I/O resources to user space, so that programs can peek and poke at the hardware. It does not itself have knowledge about the hardware device it attaches to. Sponsored by: Juniper Networks, Inc.
113 lines
3.3 KiB
C
113 lines
3.3 KiB
C
/*-
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* Copyright (c) 2014 Marcel Moolenaar
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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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* 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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*
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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 <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <machine/bus.h>
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#include <sys/rman.h>
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#include <machine/resource.h>
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#include <sys/sbuf.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcivar.h>
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#include <dev/proto/proto.h>
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static int proto_pci_probe(device_t dev);
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static int proto_pci_attach(device_t dev);
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static device_method_t proto_pci_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, proto_pci_probe),
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DEVMETHOD(device_attach, proto_pci_attach),
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DEVMETHOD(device_detach, proto_detach),
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DEVMETHOD_END
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};
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static driver_t proto_pci_driver = {
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proto_driver_name,
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proto_pci_methods,
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sizeof(struct proto_softc),
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};
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static int
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proto_pci_probe(device_t dev)
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{
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struct sbuf *sb;
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/* For now we only attach to function 0 devices. */
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if (pci_get_function(dev) != 0)
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return (ENXIO);
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sb = sbuf_new_auto();
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sbuf_printf(sb, "pci%d:%d:%d:%d", pci_get_domain(dev),
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pci_get_bus(dev), pci_get_slot(dev), pci_get_function(dev));
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sbuf_finish(sb);
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device_set_desc_copy(dev, sbuf_data(sb));
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sbuf_delete(sb);
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return (BUS_PROBE_HOOVER);
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}
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static int
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proto_pci_attach(device_t dev)
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{
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struct proto_softc *sc;
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struct resource *res;
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int bar, rid, type;
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sc = device_get_softc(dev);
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proto_add_resource(sc, PROTO_RES_PCICFG, 0, NULL);
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for (bar = 0; bar < PCIR_MAX_BAR_0; bar++) {
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rid = PCIR_BAR(bar);
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type = SYS_RES_MEMORY;
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res = bus_alloc_resource_any(dev, type, &rid, RF_ACTIVE);
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if (res == NULL) {
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type = SYS_RES_IOPORT;
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res = bus_alloc_resource_any(dev, type, &rid,
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RF_ACTIVE);
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}
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if (res != NULL)
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proto_add_resource(sc, type, rid, res);
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}
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rid = 0;
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type = SYS_RES_IRQ;
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res = bus_alloc_resource_any(dev, type, &rid, RF_ACTIVE | RF_SHAREABLE);
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if (res != NULL)
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proto_add_resource(sc, type, rid, res);
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return (proto_attach(dev));
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}
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DRIVER_MODULE(proto, pci, proto_pci_driver, proto_devclass, NULL, NULL);
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