1 files changed, 513 insertions, 0 deletions

diff --git a/sound/core/pcm_compat.c b/sound/core/pcm_compat.c
new file mode 100644
index 00000000000..3920bf0eebb
--- /dev/null
+++ b/sound/core/pcm_compat.c
@@ -0,0 +1,513 @@
+/*
+ *   32bit -> 64bit ioctl wrapper for PCM API
+ *   Copyright (c) by Takashi Iwai <tiwai@suse.de>
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ *
+ */
+
+/* This file included from pcm_native.c */
+
+#include <linux/compat.h>
+
+static int snd_pcm_ioctl_delay_compat(snd_pcm_substream_t *substream,
+				      s32 __user *src)
+{
+	snd_pcm_sframes_t delay;
+	mm_segment_t fs;
+	int err;
+
+	fs = snd_enter_user();
+	err = snd_pcm_delay(substream, &delay);
+	snd_leave_user(fs);
+	if (err < 0)
+		return err;
+	if (put_user(delay, src))
+		return -EFAULT;
+	return err;
+}
+
+static int snd_pcm_ioctl_rewind_compat(snd_pcm_substream_t *substream,
+				       u32 __user *src)
+{
+	snd_pcm_uframes_t frames;
+	int err;
+
+	if (get_user(frames, src))
+		return -EFAULT;
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		err = snd_pcm_playback_rewind(substream, frames);
+	else
+		err = snd_pcm_capture_rewind(substream, frames);
+	if (put_user(err, src))
+		return -EFAULT;
+	return err < 0 ? err : 0;
+}
+
+static int snd_pcm_ioctl_forward_compat(snd_pcm_substream_t *substream,
+				       u32 __user *src)
+{
+	snd_pcm_uframes_t frames;
+	int err;
+
+	if (get_user(frames, src))
+		return -EFAULT;
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		err = snd_pcm_playback_forward(substream, frames);
+	else
+		err = snd_pcm_capture_forward(substream, frames);
+	if (put_user(err, src))
+		return -EFAULT;
+	return err < 0 ? err : 0;
+}
+
+struct sndrv_pcm_hw_params32 {
+	u32 flags;
+	struct sndrv_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; /* this must be identical */
+	struct sndrv_mask mres[5];	/* reserved masks */
+	struct sndrv_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
+	struct sndrv_interval ires[9];	/* reserved intervals */
+	u32 rmask;
+	u32 cmask;
+	u32 info;
+	u32 msbits;
+	u32 rate_num;
+	u32 rate_den;
+	u32 fifo_size;
+	unsigned char reserved[64];
+};
+
+struct sndrv_pcm_sw_params32 {
+	s32 tstamp_mode;
+	u32 period_step;
+	u32 sleep_min;
+	u32 avail_min;
+	u32 xfer_align;
+	u32 start_threshold;
+	u32 stop_threshold;
+	u32 silence_threshold;
+	u32 silence_size;
+	u32 boundary;
+	unsigned char reserved[64];
+};
+
+static int snd_pcm_ioctl_sw_params_compat(snd_pcm_substream_t *substream,
+					  struct sndrv_pcm_sw_params32 __user *src)
+{
+	snd_pcm_sw_params_t params;
+	int err;
+
+	memset(&params, 0, sizeof(params));
+	if (get_user(params.tstamp_mode, &src->tstamp_mode) ||
+	    get_user(params.period_step, &src->period_step) ||
+	    get_user(params.sleep_min, &src->sleep_min) ||
+	    get_user(params.avail_min, &src->avail_min) ||
+	    get_user(params.xfer_align, &src->xfer_align) ||
+	    get_user(params.start_threshold, &src->start_threshold) ||
+	    get_user(params.stop_threshold, &src->stop_threshold) ||
+	    get_user(params.silence_threshold, &src->silence_threshold) ||
+	    get_user(params.silence_size, &src->silence_size))
+		return -EFAULT;
+	err = snd_pcm_sw_params(substream, &params);
+	if (err < 0)
+		return err;
+	if (put_user(params.boundary, &src->boundary))
+		return -EFAULT;
+	return err;
+}
+
+struct sndrv_pcm_channel_info32 {
+	u32 channel;
+	u32 offset;
+	u32 first;
+	u32 step;
+};
+
+static int snd_pcm_ioctl_channel_info_compat(snd_pcm_substream_t *substream,
+					     struct sndrv_pcm_channel_info32 __user *src)
+{
+	snd_pcm_channel_info_t info;
+	int err;
+
+	if (get_user(info.channel, &src->channel) ||
+	    get_user(info.offset, &src->offset) ||
+	    get_user(info.first, &src->first) ||
+	    get_user(info.step, &src->step))
+		return -EFAULT;
+	err = snd_pcm_channel_info(substream, &info);
+	if (err < 0)
+		return err;
+	if (put_user(info.channel, &src->channel) ||
+	    put_user(info.offset, &src->offset) ||
+	    put_user(info.first, &src->first) ||
+	    put_user(info.step, &src->step))
+		return -EFAULT;
+	return err;
+}
+
+struct sndrv_pcm_status32 {
+	s32 state;
+	struct compat_timespec trigger_tstamp;
+	struct compat_timespec tstamp;
+	u32 appl_ptr;
+	u32 hw_ptr;
+	s32 delay;
+	u32 avail;
+	u32 avail_max;
+	u32 overrange;
+	s32 suspended_state;
+	unsigned char reserved[60];
+} __attribute__((packed));
+
+
+static int snd_pcm_status_user_compat(snd_pcm_substream_t *substream,
+				      struct sndrv_pcm_status32 __user *src)
+{
+	snd_pcm_status_t status;
+	int err;
+
+	err = snd_pcm_status(substream, &status);
+	if (err < 0)
+		return err;
+
+	if (put_user(status.state, &src->state) ||
+	    put_user(status.trigger_tstamp.tv_sec, &src->trigger_tstamp.tv_sec) ||
+	    put_user(status.trigger_tstamp.tv_nsec, &src->trigger_tstamp.tv_nsec) ||
+	    put_user(status.tstamp.tv_sec, &src->tstamp.tv_sec) ||
+	    put_user(status.tstamp.tv_nsec, &src->tstamp.tv_nsec) ||
+	    put_user(status.appl_ptr, &src->appl_ptr) ||
+	    put_user(status.hw_ptr, &src->hw_ptr) ||
+	    put_user(status.delay, &src->delay) ||
+	    put_user(status.avail, &src->avail) ||
+	    put_user(status.avail_max, &src->avail_max) ||
+	    put_user(status.overrange, &src->overrange) ||
+	    put_user(status.suspended_state, &src->suspended_state))
+		return -EFAULT;
+
+	return err;
+}
+
+/* recalcuate the boundary within 32bit */
+static void recalculate_boundary(snd_pcm_runtime_t *runtime)
+{
+	if (! runtime->buffer_size)
+		return;
+	runtime->boundary = runtime->buffer_size;
+	while (runtime->boundary * 2 <= 0x7fffffffUL - runtime->buffer_size)
+		runtime->boundary *= 2;
+}
+
+/* both for HW_PARAMS and HW_REFINE */
+static int snd_pcm_ioctl_hw_params_compat(snd_pcm_substream_t *substream,
+					  int refine, 
+					  struct sndrv_pcm_hw_params32 __user *data32)
+{
+	struct sndrv_pcm_hw_params *data;
+	snd_pcm_runtime_t *runtime;
+	int err;
+
+	if (! (runtime = substream->runtime))
+		return -ENOTTY;
+
+	data = kmalloc(sizeof(*data), GFP_KERNEL);
+	if (data == NULL)
+		return -ENOMEM;
+	/* only fifo_size is different, so just copy all */
+	if (copy_from_user(data, data32, sizeof(*data32))) {
+		err = -EFAULT;
+		goto error;
+	}
+	if (refine)
+		err = snd_pcm_hw_refine(substream, data);
+	else
+		err = snd_pcm_hw_params(substream, data);
+	if (err < 0)
+		goto error;
+	if (copy_to_user(data32, data, sizeof(*data32)) ||
+	    put_user(data->fifo_size, &data32->fifo_size)) {
+		err = -EFAULT;
+		goto error;
+	}
+
+	if (! refine)
+		recalculate_boundary(runtime);
+ error:
+	kfree(data);
+	return err;
+}
+
+
+/*
+ */
+struct sndrv_xferi32 {
+	s32 result;
+	u32 buf;
+	u32 frames;
+};
+
+static int snd_pcm_ioctl_xferi_compat(snd_pcm_substream_t *substream,
+				      int dir, struct sndrv_xferi32 __user *data32)
+{
+	compat_caddr_t buf;
+	u32 frames;
+	int err;
+
+	if (! substream->runtime)
+		return -ENOTTY;
+	if (substream->stream != dir)
+		return -EINVAL;
+	if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN)
+		return -EBADFD;
+
+	if (get_user(buf, &data32->buf) ||
+	    get_user(frames, &data32->frames))
+		return -EFAULT;
+
+	if (dir == SNDRV_PCM_STREAM_PLAYBACK)
+		err = snd_pcm_lib_write(substream, compat_ptr(buf), frames);
+	else
+		err = snd_pcm_lib_read(substream, compat_ptr(buf), frames);
+	if (err < 0)
+		return err;
+	/* copy the result */
+	if (put_user(err, &data32->result))
+		return -EFAULT;
+	return 0;
+}
+
+
+/* snd_xfern needs remapping of bufs */
+struct sndrv_xfern32 {
+	s32 result;
+	u32 bufs;  /* this is void **; */
+	u32 frames;
+};
+
+/*
+ * xfern ioctl nees to copy (up to) 128 pointers on stack.
+ * although we may pass the copied pointers through f_op->ioctl, but the ioctl
+ * handler there expands again the same 128 pointers on stack, so it is better
+ * to handle the function (calling pcm_readv/writev) directly in this handler.
+ */
+static int snd_pcm_ioctl_xfern_compat(snd_pcm_substream_t *substream,
+				      int dir, struct sndrv_xfern32 __user *data32)
+{
+	compat_caddr_t buf;
+	compat_caddr_t __user *bufptr;
+	u32 frames;
+	void __user **bufs;
+	int err, ch, i;
+
+	if (! substream->runtime)
+		return -ENOTTY;
+	if (substream->stream != dir)
+		return -EINVAL;
+
+	if ((ch = substream->runtime->channels) > 128)
+		return -EINVAL;
+	if (get_user(buf, &data32->bufs) ||
+	    get_user(frames, &data32->frames))
+		return -EFAULT;
+	bufptr = compat_ptr(buf);
+	bufs = kmalloc(sizeof(void __user *) * ch, GFP_KERNEL);
+	if (bufs == NULL)
+		return -ENOMEM;
+	for (i = 0; i < ch; i++) {
+		u32 ptr;
+		if (get_user(ptr, bufptr)) {
+			kfree(bufs);
+			return -EFAULT;
+		}
+		bufs[ch] = compat_ptr(ptr);
+		bufptr++;
+	}
+	if (dir == SNDRV_PCM_STREAM_PLAYBACK)
+		err = snd_pcm_lib_writev(substream, bufs, frames);
+	else
+		err = snd_pcm_lib_readv(substream, bufs, frames);
+	if (err >= 0) {
+		if (put_user(err, &data32->result))
+			err = -EFAULT;
+	}
+	kfree(bufs);
+	return err;
+}
+
+
+struct sndrv_pcm_mmap_status32 {
+	s32 state;
+	s32 pad1;
+	u32 hw_ptr;
+	struct compat_timespec tstamp;
+	s32 suspended_state;
+} __attribute__((packed));
+
+struct sndrv_pcm_mmap_control32 {
+	u32 appl_ptr;
+	u32 avail_min;
+};
+
+struct sndrv_pcm_sync_ptr32 {
+	u32 flags;
+	union {
+		struct sndrv_pcm_mmap_status32 status;
+		unsigned char reserved[64];
+	} s;
+	union {
+		struct sndrv_pcm_mmap_control32 control;
+		unsigned char reserved[64];
+	} c;
+} __attribute__((packed));
+
+static int snd_pcm_ioctl_sync_ptr_compat(snd_pcm_substream_t *substream,
+					 struct sndrv_pcm_sync_ptr32 __user *src)
+{
+	snd_pcm_runtime_t *runtime = substream->runtime;
+	volatile struct sndrv_pcm_mmap_status *status;
+	volatile struct sndrv_pcm_mmap_control *control;
+	u32 sflags;
+	struct sndrv_pcm_mmap_control scontrol;
+	struct sndrv_pcm_mmap_status sstatus;
+	int err;
+
+	snd_assert(runtime, return -EINVAL);
+
+	if (get_user(sflags, &src->flags) ||
+	    get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
+	    get_user(scontrol.avail_min, &src->c.control.avail_min))
+		return -EFAULT;
+	if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
+		err = snd_pcm_hwsync(substream);
+		if (err < 0)
+			return err;
+	}
+	status = runtime->status;
+	control = runtime->control;
+	snd_pcm_stream_lock_irq(substream);
+	if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL))
+		control->appl_ptr = scontrol.appl_ptr;
+	else
+		scontrol.appl_ptr = control->appl_ptr;
+	if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
+		control->avail_min = scontrol.avail_min;
+	else
+		scontrol.avail_min = control->avail_min;
+	sstatus.state = status->state;
+	sstatus.hw_ptr = status->hw_ptr;
+	sstatus.tstamp = status->tstamp;
+	sstatus.suspended_state = status->suspended_state;
+	snd_pcm_stream_unlock_irq(substream);
+	if (put_user(sstatus.state, &src->s.status.state) ||
+	    put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) ||
+	    put_user(sstatus.tstamp.tv_sec, &src->s.status.tstamp.tv_sec) ||
+	    put_user(sstatus.tstamp.tv_nsec, &src->s.status.tstamp.tv_nsec) ||
+	    put_user(sstatus.suspended_state, &src->s.status.suspended_state) ||
+	    put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
+	    put_user(scontrol.avail_min, &src->c.control.avail_min))
+		return -EFAULT;
+
+	return 0;
+}
+
+
+/*
+ */
+enum {
+	SNDRV_PCM_IOCTL_HW_REFINE32 = _IOWR('A', 0x10, struct sndrv_pcm_hw_params32),
+	SNDRV_PCM_IOCTL_HW_PARAMS32 = _IOWR('A', 0x11, struct sndrv_pcm_hw_params32),
+	SNDRV_PCM_IOCTL_SW_PARAMS32 = _IOWR('A', 0x13, struct sndrv_pcm_sw_params32),
+	SNDRV_PCM_IOCTL_STATUS32 = _IOR('A', 0x20, struct sndrv_pcm_status32),
+	SNDRV_PCM_IOCTL_DELAY32 = _IOR('A', 0x21, s32),
+	SNDRV_PCM_IOCTL_CHANNEL_INFO32 = _IOR('A', 0x32, struct sndrv_pcm_channel_info32),
+	SNDRV_PCM_IOCTL_REWIND32 = _IOW('A', 0x46, u32),
+	SNDRV_PCM_IOCTL_FORWARD32 = _IOW('A', 0x49, u32),
+	SNDRV_PCM_IOCTL_WRITEI_FRAMES32 = _IOW('A', 0x50, struct sndrv_xferi32),
+	SNDRV_PCM_IOCTL_READI_FRAMES32 = _IOR('A', 0x51, struct sndrv_xferi32),
+	SNDRV_PCM_IOCTL_WRITEN_FRAMES32 = _IOW('A', 0x52, struct sndrv_xfern32),
+	SNDRV_PCM_IOCTL_READN_FRAMES32 = _IOR('A', 0x53, struct sndrv_xfern32),
+	SNDRV_PCM_IOCTL_SYNC_PTR32 = _IOWR('A', 0x23, struct sndrv_pcm_sync_ptr32),
+
+};
+
+static long snd_pcm_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
+{
+	snd_pcm_file_t *pcm_file;
+	snd_pcm_substream_t *substream;
+	void __user *argp = compat_ptr(arg);
+
+	pcm_file = file->private_data;
+	if (! pcm_file)
+		return -ENOTTY;
+	substream = pcm_file->substream;
+	if (! substream)
+		return -ENOTTY;
+
+	/*
+	 * When PCM is used on 32bit mode, we need to disable
+	 * mmap of PCM status/control records because of the size
+	 * incompatibility.
+	 */
+	substream->no_mmap_ctrl = 1;
+
+	switch (cmd) {
+	case SNDRV_PCM_IOCTL_PVERSION:
+	case SNDRV_PCM_IOCTL_INFO:
+	case SNDRV_PCM_IOCTL_TSTAMP:
+	case SNDRV_PCM_IOCTL_HWSYNC:
+	case SNDRV_PCM_IOCTL_PREPARE:
+	case SNDRV_PCM_IOCTL_RESET:
+	case SNDRV_PCM_IOCTL_START:
+	case SNDRV_PCM_IOCTL_DROP:
+	case SNDRV_PCM_IOCTL_DRAIN:
+	case SNDRV_PCM_IOCTL_PAUSE:
+	case SNDRV_PCM_IOCTL_HW_FREE:
+	case SNDRV_PCM_IOCTL_RESUME:
+	case SNDRV_PCM_IOCTL_XRUN:
+	case SNDRV_PCM_IOCTL_LINK:
+	case SNDRV_PCM_IOCTL_UNLINK:
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+			return snd_pcm_playback_ioctl1(substream, cmd, argp);
+		else
+			return snd_pcm_capture_ioctl1(substream, cmd, argp);
+	case SNDRV_PCM_IOCTL_HW_REFINE32:
+		return snd_pcm_ioctl_hw_params_compat(substream, 1, argp);
+	case SNDRV_PCM_IOCTL_HW_PARAMS32:
+		return snd_pcm_ioctl_hw_params_compat(substream, 0, argp);
+	case SNDRV_PCM_IOCTL_SW_PARAMS32:
+		return snd_pcm_ioctl_sw_params_compat(substream, argp);
+	case SNDRV_PCM_IOCTL_STATUS32:
+		return snd_pcm_status_user_compat(substream, argp);
+	case SNDRV_PCM_IOCTL_SYNC_PTR32:
+		return snd_pcm_ioctl_sync_ptr_compat(substream, argp);
+	case SNDRV_PCM_IOCTL_CHANNEL_INFO32:
+		return snd_pcm_ioctl_channel_info_compat(substream, argp);
+	case SNDRV_PCM_IOCTL_WRITEI_FRAMES32:
+		return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
+	case SNDRV_PCM_IOCTL_READI_FRAMES32:
+		return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
+	case SNDRV_PCM_IOCTL_WRITEN_FRAMES32:
+		return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
+	case SNDRV_PCM_IOCTL_READN_FRAMES32:
+		return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
+	case SNDRV_PCM_IOCTL_DELAY32:
+		return snd_pcm_ioctl_delay_compat(substream, argp);
+	case SNDRV_PCM_IOCTL_REWIND32:
+		return snd_pcm_ioctl_rewind_compat(substream, argp);
+	case SNDRV_PCM_IOCTL_FORWARD32:
+		return snd_pcm_ioctl_forward_compat(substream, argp);
+	}
+
+	return -ENOIOCTLCMD;
+}