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vmbus_acpi.c revision 1.2 
      1 /*	$NetBSD: vmbus_acpi.c,v 1.2 2019/05/24 14:28:48 nonaka Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2018 Kimihiro Nonaka <nonaka (at) NetBSD.org>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. The name of the author may not be used to endorse or promote products
     13  *    derived from this software without specific prior written permission.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     20  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     21  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     22  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     23  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     25  * SUCH DAMAGE.
     26  */
     27 
     28 #include <sys/cdefs.h>
     29 __KERNEL_RCSID(0, "$NetBSD: vmbus_acpi.c,v 1.2 2019/05/24 14:28:48 nonaka Exp $");
     30 
     31 #include <sys/param.h>
     32 #include <sys/device.h>
     33 #include <sys/systm.h>
     34 #include <sys/kmem.h>
     35 
     36 #include <dev/acpi/acpireg.h>
     37 #include <dev/acpi/acpivar.h>
     38 
     39 #include <dev/hyperv/vmbusvar.h>
     40 
     41 #define _COMPONENT	ACPI_RESOURCE_COMPONENT
     42 ACPI_MODULE_NAME	("vmbus_acpi")
     43 
     44 static int	vmbus_acpi_match(device_t, cfdata_t, void *);
     45 static void	vmbus_acpi_attach(device_t, device_t, void *);
     46 static int	vmbus_acpi_detach(device_t, int);
     47 
     48 struct vmbus_acpi_softc {
     49 	struct vmbus_softc sc;
     50 };
     51 
     52 CFATTACH_DECL_NEW(vmbus_acpi, sizeof(struct vmbus_acpi_softc),
     53     vmbus_acpi_match, vmbus_acpi_attach, vmbus_acpi_detach, NULL);
     54 
     55 static const char * const vmbus_acpi_ids[] = {
     56 	"VMBUS",
     57 	"VMBus",
     58 	NULL
     59 };
     60 
     61 static int
     62 vmbus_acpi_match(device_t parent, cfdata_t match, void *opaque)
     63 {
     64 	struct acpi_attach_args *aa = opaque;
     65 
     66 	if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
     67 		return 0;
     68 
     69 	if (!acpi_match_hid(aa->aa_node->ad_devinfo, vmbus_acpi_ids))
     70 		return 0;
     71 
     72 	if (!vmbus_match(parent, match, opaque))
     73 		return 0;
     74 
     75 	return 1;
     76 }
     77 
     78 static void
     79 vmbus_acpi_attach(device_t parent, device_t self, void *opaque)
     80 {
     81 	struct vmbus_acpi_softc *sc = device_private(self);
     82 	struct acpi_attach_args *aa = opaque;
     83 
     84 	sc->sc.sc_dev = self;
     85 	sc->sc.sc_iot = aa->aa_iot;
     86 	sc->sc.sc_memt = aa->aa_memt;
     87 	sc->sc.sc_dmat = aa->aa_dmat64 ? aa->aa_dmat64 : aa->aa_dmat;
     88 
     89 	if (vmbus_attach(&sc->sc))
     90 		return;
     91 
     92 	(void)pmf_device_register(self, NULL, NULL);
     93 }
     94 
     95 static int
     96 vmbus_acpi_detach(device_t self, int flags)
     97 {
     98 	struct vmbus_acpi_softc *sc = device_private(self);
     99 	int rv;
    100 
    101 	rv = vmbus_detach(&sc->sc, flags);
    102 	if (rv)
    103 		return rv;
    104 
    105 	pmf_device_deregister(self);
    106 
    107 	return 0;
    108 }
    109