This kld adds DVB ioctl handling to the Linux compatibility layer

so that Linux apps can talk to DVB/ATSC tuners via /dev/dvb/adapterX.

Note this port does not contain actual DVB drivers, those are
provided by e.g. the multimedia/webcamd port.

WWW: http://people.freebsd.org/~nox/dvb/

1 files changed, 334 insertions, 0 deletions

diff --git a/multimedia/linux_dvbwrapper-kmod/files/linux_dvbwrapper.c b/multimedia/linux_dvbwrapper-kmod/files/linux_dvbwrapper.c
new file mode 100644
index 000000000000..8045c12e94c7
--- /dev/null
+++ b/multimedia/linux_dvbwrapper-kmod/files/linux_dvbwrapper.c
@@ -0,0 +1,334 @@
+/*-
+ * Copyright (c) 2011 Juergen Lock
+ * 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.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD: /tmp/pcvs/ports/multimedia/linux_dvbwrapper-kmod/files/linux_dvbwrapper.c,v 1.1 2011-04-24 15:51:13 nox Exp $");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/conf.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/file.h>
+#include <sys/proc.h>
+#include <sys/ioccom.h>
+#include <sys/sysproto.h>
+#include <sys/mman.h>
+#include <sys/resourcevar.h>
+
+#include <vm/vm.h>
+#include <vm/pmap.h>
+#include <vm/vm_extern.h>
+#include <vm/vm_map.h>
+
+#ifdef COMPAT_LINUX32
+#include <machine/../linux32/linux.h>
+#include <machine/../linux32/linux32_proto.h>
+#else
+#include <machine/../linux/linux.h>
+#include <machine/../linux/linux_proto.h>
+#endif
+#include <compat/linux/linux_ioctl.h>
+#include <compat/linux/linux_util.h>
+
+#include "linux_dvb_ioctl.h"
+#include "linux_dvb.h"
+#include "linux_dvb_compat.h"
+
+static linux_ioctl_function_t linux_ioctl_dvb;
+static struct linux_ioctl_handler dvb_handler =
+{ linux_ioctl_dvb, LINUX_IOCTL_DVB_MIN, LINUX_IOCTL_DVB_MAX };
+
+SYSINIT  (dvbwrapper_register,   SI_SUB_KLD, SI_ORDER_MIDDLE,
+	  linux_ioctl_register_handler, &dvb_handler);
+SYSUNINIT(dvbwrapper_unregister, SI_SUB_KLD, SI_ORDER_MIDDLE,
+	  linux_ioctl_unregister_handler, &dvb_handler);
+
+static MALLOC_DEFINE(M_LINUX_DVB, "linux_dvbwrapper", "Linux DVB wrapper");
+
+static int
+linux_dvbwrapper_modevent(module_t mod, int cmd, void *data)
+{
+	return (0);
+}
+
+DEV_MODULE(linux_dvbwrapper, linux_dvbwrapper_modevent, NULL);
+MODULE_DEPEND(linux_dvbwrapper, linux, 1, 1, 1);
+
+#if ((__FreeBSD_version >= 900000) && (__FreeBSD_version < 900035)) || \
+    (__FreeBSD_version < 802503)
+/*
+ * Map some anonymous memory in user space of size sz, rounded up to the page
+ * boundary.
+ */
+int
+copyout_map(struct thread *td, vm_offset_t *addr, size_t sz)
+{
+	struct vmspace *vms;
+	int error;
+	vm_size_t size;
+
+	vms = td->td_proc->p_vmspace;
+
+	/*
+	 * Map somewhere after heap in process memory.
+	 */
+	PROC_LOCK(td->td_proc);
+	*addr = round_page((vm_offset_t)vms->vm_daddr +
+	    lim_max(td->td_proc, RLIMIT_DATA));
+	PROC_UNLOCK(td->td_proc);
+
+	/* round size up to page boundry */
+	size = (vm_size_t)round_page(sz);
+
+	error = vm_mmap(&vms->vm_map, addr, size, PROT_READ | PROT_WRITE,
+	    VM_PROT_ALL, MAP_PRIVATE | MAP_ANON, OBJT_DEFAULT, NULL, 0);
+
+	return (error);
+}
+
+/*
+ * Unmap memory in user space.
+ */
+int
+copyout_unmap(struct thread *td, vm_offset_t addr, size_t sz)
+{
+	vm_map_t map;
+	vm_size_t size;
+
+	if (sz == 0)
+		return (0);
+
+	map = &td->td_proc->p_vmspace->vm_map;
+	size = (vm_size_t)round_page(sz);
+
+	if (vm_map_remove(map, addr, addr + size) != KERN_SUCCESS)
+		return (EINVAL);
+
+	return (0);
+}
+#endif
+
+static int
+linux_to_bsd_dtv_properties(struct l_dtv_properties *lvps, struct dtv_properties *vps)
+{
+
+	vps->num = lvps->num;
+	vps->props = PTRIN(lvps->props);	/* possible pointer size conversion */
+	return (0);
+}
+
+static int
+linux_to_bsd_dtv_property(struct l_dtv_property *lvp, struct dtv_property *vp)
+{
+
+	/*
+	 * Everything until u.buffer.reserved2 is fixed size so
+	 * just memcpy it.
+	 */
+	memcpy(vp, lvp, offsetof(struct l_dtv_property, u.buffer.reserved2));
+	/*
+	 * The pointer may be garbage since it's part of a union,
+	 * currently no Linux code uses it so just set it to NULL.
+	 */
+	vp->u.buffer.reserved2 = NULL;
+	vp->result = lvp->result;
+	return (0);
+}
+
+static int
+bsd_to_linux_dtv_property(struct dtv_property *vp, struct l_dtv_property *lvp)
+{
+
+	/*
+	 * Everything until u.buffer.reserved2 is fixed size so
+	 * just memcpy it.
+	 */
+	memcpy(lvp, vp, offsetof(struct l_dtv_property, u.buffer.reserved2));
+	/*
+	 * The pointer may be garbage since it's part of a union,
+	 * currently no Linux code uses it so just set it to NULL.
+	 */
+	lvp->u.buffer.reserved2 = PTROUT(NULL);
+	lvp->result = vp->result;
+	return (0);
+}
+
+static int
+linux_ioctl_dvb(struct thread *td, struct linux_ioctl_args *args)
+{
+	struct file *fp;
+	int error, i;
+	struct l_dtv_properties l_vps;
+	struct dtv_properties vps;
+	struct l_dtv_property *l_vp, *l_p;
+	struct dtv_property *vp, *p;
+	size_t l_propsiz, propsiz;
+	vm_offset_t uvp;
+
+	l_vp = NULL;
+	vp = NULL;
+
+	switch (args->cmd & 0xffff) {
+	case LINUX_AUDIO_STOP:
+	case LINUX_AUDIO_PLAY:
+	case LINUX_AUDIO_PAUSE:
+	case LINUX_AUDIO_CONTINUE:
+	case LINUX_AUDIO_SELECT_SOURCE:
+	case LINUX_AUDIO_SET_MUTE:
+	case LINUX_AUDIO_SET_AV_SYNC:
+	case LINUX_AUDIO_SET_BYPASS_MODE:
+	case LINUX_AUDIO_CHANNEL_SELECT:
+	case LINUX_AUDIO_CLEAR_BUFFER:
+	case LINUX_AUDIO_SET_ID:
+	case LINUX_AUDIO_SET_STREAMTYPE:
+	case LINUX_AUDIO_SET_EXT_ID:
+	case LINUX_AUDIO_BILINGUAL_CHANNEL_SELECT:
+	case LINUX_DMX_START:
+	case LINUX_DMX_STOP:
+	case LINUX_DMX_SET_BUFFER_SIZE:
+	case LINUX_NET_REMOVE_IF:
+	case LINUX_FE_DISEQC_RESET_OVERLOAD:
+	case LINUX_FE_DISEQC_SEND_BURST:
+	case LINUX_FE_SET_TONE:
+	case LINUX_FE_SET_VOLTAGE:
+	case LINUX_FE_ENABLE_HIGH_LNB_VOLTAGE:
+	case LINUX_FE_DISHNETWORK_SEND_LEGACY_CMD:
+	case LINUX_FE_SET_FRONTEND_TUNE_MODE:
+	case LINUX_CA_RESET:
+		if ((args->cmd & IOC_DIRMASK) != LINUX_IOC_VOID)
+			return ENOIOCTL;
+		args->cmd = (args->cmd & 0xffff) | IOC_VOID;
+		break;
+
+	case LINUX_DMX_REMOVE_PID:
+		/* overlaps with LINUX_NET_ADD_IF */
+		if ((args->cmd & IOC_DIRMASK) == LINUX_IOC_INOUT)
+			goto net_add_if;
+		/* FALLTHRU */
+	case LINUX_AUDIO_SET_MIXER:
+	case LINUX_AUDIO_SET_ATTRIBUTES:
+	case LINUX_AUDIO_SET_KARAOKE:
+	case LINUX_DMX_SET_FILTER:
+	case LINUX_DMX_SET_PES_FILTER:
+	case LINUX_DMX_SET_SOURCE:
+	case LINUX_DMX_ADD_PID:
+	case LINUX_FE_DISEQC_SEND_MASTER_CMD:
+	case LINUX_FE_SET_FRONTEND:
+	case LINUX_CA_SEND_MSG:
+	case LINUX_CA_SET_DESCR:
+	case LINUX_CA_SET_PID:
+		args->cmd = (args->cmd & ~IOC_DIRMASK) | IOC_IN;
+		break;
+
+	case LINUX_AUDIO_GET_STATUS:
+	case LINUX_AUDIO_GET_CAPABILITIES:
+	case LINUX_AUDIO_GET_PTS:
+	case LINUX_DMX_GET_PES_PIDS:
+	case LINUX_DMX_GET_CAPS:
+	case LINUX_FE_GET_INFO:
+	case LINUX_FE_DISEQC_RECV_SLAVE_REPLY:
+	case LINUX_FE_READ_STATUS:
+	case LINUX_FE_READ_BER:
+	case LINUX_FE_READ_SIGNAL_STRENGTH:
+	case LINUX_FE_READ_SNR:
+	case LINUX_FE_READ_UNCORRECTED_BLOCKS:
+	case LINUX_FE_GET_FRONTEND:
+	case LINUX_FE_GET_EVENT:
+	case LINUX_CA_GET_CAP:
+	case LINUX_CA_GET_SLOT_INFO:
+	case LINUX_CA_GET_DESCR_INFO:
+	case LINUX_CA_GET_MSG:
+		args->cmd = (args->cmd & ~IOC_DIRMASK) | IOC_OUT;
+		break;
+
+	case LINUX_DMX_GET_STC:
+	case LINUX_NET_GET_IF:
+	net_add_if:
+		args->cmd = (args->cmd & ~IOC_DIRMASK) | IOC_INOUT;
+		break;
+
+	case LINUX_FE_SET_PROPERTY:
+	case LINUX_FE_GET_PROPERTY:
+		error = copyin((void *)args->arg, &l_vps, sizeof(l_vps));
+		if (error)
+			return (error);
+		linux_to_bsd_dtv_properties(&l_vps, &vps);
+		if ((vps.num == 0) || vps.num > DTV_IOCTL_MAX_MSGS)
+			return EINVAL;
+
+		l_propsiz = vps.num * sizeof(*l_vp);
+		propsiz = vps.num * sizeof(*vp);
+		l_vp = malloc(l_propsiz, M_LINUX_DVB, M_WAITOK);
+		vp = malloc(propsiz, M_LINUX_DVB, M_WAITOK);
+		error = copyin((void *)vps.props, l_vp, l_propsiz);
+		if (error)
+			goto out2;
+		for (i = vps.num, l_p = l_vp, p = vp; i--; ++l_p, ++p)
+			linux_to_bsd_dtv_property(l_p, p);
+
+		error = copyout_map(td, &uvp, propsiz);
+		if (error)
+			goto out2;
+		copyout(vp, (void *)uvp, propsiz);
+
+		if ((error = fget(td, args->fd, &fp)) != 0) {
+			(void)copyout_unmap(td, uvp, propsiz);
+			goto out2;
+		}
+		vps.props = (void *)uvp;
+		if ((args->cmd & 0xffff) == LINUX_FE_SET_PROPERTY)
+			error = fo_ioctl(fp, FE_SET_PROPERTY, &vps, td->td_ucred, td);
+		else
+			error = fo_ioctl(fp, FE_GET_PROPERTY, &vps, td->td_ucred, td);
+		if (error) {
+			(void)copyout_unmap(td, uvp, propsiz);
+			goto out;
+		}
+		error = copyin((void *)uvp, vp, propsiz);
+		(void)copyout_unmap(td, uvp, propsiz);
+		if (error)
+			goto out;
+		for (i = vps.num, l_p = l_vp, p = vp; i--; ++l_p, ++p)
+			bsd_to_linux_dtv_property(p, l_p);
+		linux_to_bsd_dtv_properties(&l_vps, &vps);
+		copyout(l_vp, (void *)vps.props, l_propsiz);
+
+	out:
+		fdrop(fp, td);
+	out2:
+		if (l_vp)
+			free(l_vp, M_LINUX_DVB);
+		if (vp)
+			free(vp, M_LINUX_DVB);
+		return (error);
+
+	default:			return (ENOIOCTL);
+	}
+
+	error = ioctl(td, (struct ioctl_args *)args);
+	return (error);
+}