160 lines
4.5 KiB
C
160 lines
4.5 KiB
C
/* $NetBSD: genfb_vmbus.c,v 1.3 2021/08/07 16:19:11 thorpej Exp $ */
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/*-
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* Copyright (c) 2007 Michael Lorenz
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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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: genfb_vmbus.c,v 1.3 2021/08/07 16:19:11 thorpej Exp $");
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#include "opt_wsfb.h"
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#include "opt_genfb.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/device.h>
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#include <sys/proc.h>
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#include <sys/mutex.h>
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#include <sys/ioctl.h>
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#include <sys/systm.h>
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#include <sys/kauth.h>
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#include <dev/wsfb/genfbvar.h>
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#include <dev/hyperv/vmbusvar.h>
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#include <dev/hyperv/genfb_vmbusvar.h>
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static int genfb_vmbus_match(device_t, cfdata_t, void *);
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static void genfb_vmbus_attach(device_t, device_t, void *);
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static int genfb_vmbus_ioctl(void *, void *, u_long, void *, int,
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struct lwp *);
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static paddr_t genfb_vmbus_mmap(void *, void *, off_t, int);
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static int genfb_vmbus_drm_print(void *, const char *);
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static bool genfb_vmbus_shutdown(device_t, int);
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CFATTACH_DECL_NEW(genfb_vmbus, sizeof(struct genfb_vmbus_softc),
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genfb_vmbus_match, genfb_vmbus_attach, NULL, NULL);
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static int
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genfb_vmbus_match(device_t parent, cfdata_t match, void *aux)
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{
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struct vmbus_attach_args *aa = aux;
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if (memcmp(aa->aa_type, &hyperv_guid_video, sizeof(*aa->aa_type)) != 0)
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return 0;
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if (!genfb_is_enabled())
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return 0; /* explicitly disabled by MD code */
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/* Use genfb(4) at pci in Gen.1 VM. */
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if (hyperv_is_gen1())
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return 0;
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return 1;
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}
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static void
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genfb_vmbus_attach(device_t parent, device_t self, void *aux)
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{
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static const struct genfb_ops zero_ops;
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struct genfb_vmbus_softc *sc = device_private(self);
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struct vmbus_attach_args *aa = aux;
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struct genfb_ops ops = zero_ops;
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aprint_naive("\n");
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aprint_normal(": Hyper-V Synthetic Video\n");
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sc->sc_gen.sc_dev = self;
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sc->sc_memt = aa->aa_memt;
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genfb_init(&sc->sc_gen);
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/* firmware / MD code responsible for restoring the display */
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if (sc->sc_gen.sc_pmfcb == NULL)
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pmf_device_register1(self, NULL, NULL,
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genfb_vmbus_shutdown);
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else
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pmf_device_register1(self,
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sc->sc_gen.sc_pmfcb->gpc_suspend,
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sc->sc_gen.sc_pmfcb->gpc_resume,
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genfb_vmbus_shutdown);
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if ((sc->sc_gen.sc_width == 0) || (sc->sc_gen.sc_fbsize == 0)) {
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aprint_debug_dev(self, "not configured by firmware\n");
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return;
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}
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ops.genfb_ioctl = genfb_vmbus_ioctl;
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ops.genfb_mmap = genfb_vmbus_mmap;
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if (genfb_attach(&sc->sc_gen, &ops) != 0)
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return;
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/* now try to attach a DRM */
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config_found(self, aux, genfb_vmbus_drm_print,
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CFARGS(.iattr = "drm"));
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}
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static int
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genfb_vmbus_drm_print(void *aux, const char *pnp)
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{
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if (pnp)
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aprint_normal("drm at %s", pnp);
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return UNCONF;
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}
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static int
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genfb_vmbus_ioctl(void *v, void *vs, u_long cmd, void *data, int flag,
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struct lwp *l)
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{
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switch (cmd) {
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case WSDISPLAYIO_GTYPE:
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*(u_int *)data = WSDISPLAY_TYPE_GENFB;
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return 0;
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}
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return EPASSTHROUGH;
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}
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static paddr_t
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genfb_vmbus_mmap(void *v, void *vs, off_t offset, int prot)
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{
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struct genfb_vmbus_softc *sc = v;
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return bus_space_mmap(sc->sc_memt, sc->sc_gen.sc_fboffset, offset, prot,
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BUS_SPACE_MAP_LINEAR | BUS_SPACE_MAP_PREFETCHABLE);
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}
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static bool
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genfb_vmbus_shutdown(device_t self, int flags)
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{
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genfb_enable_polling(self);
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return true;
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}
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