--- /dev/null
+/*
+ * 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>
+#include <linux/slab.h>
+
+static int snd_pcm_ioctl_delay_compat(struct snd_pcm_substream *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(struct snd_pcm_substream *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(struct snd_pcm_substream *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 snd_pcm_hw_params32 {
+ u32 flags;
+ struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; /* this must be identical */
+ struct snd_mask mres[5]; /* reserved masks */
+ struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
+ struct snd_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 snd_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;
+ u32 proto;
+ u32 tstamp_type;
+ unsigned char reserved[56];
+};
+
+/* recalcuate the boundary within 32bit */
+static snd_pcm_uframes_t recalculate_boundary(struct snd_pcm_runtime *runtime)
+{
+ snd_pcm_uframes_t boundary;
+
+ if (! runtime->buffer_size)
+ return 0;
+ boundary = runtime->buffer_size;
+ while (boundary * 2 <= 0x7fffffffUL - runtime->buffer_size)
+ boundary *= 2;
+ return boundary;
+}
+
+static int snd_pcm_ioctl_sw_params_compat(struct snd_pcm_substream *substream,
+ struct snd_pcm_sw_params32 __user *src)
+{
+ struct snd_pcm_sw_params params;
+ snd_pcm_uframes_t boundary;
+ int err;
+
+ memset(¶ms, 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) ||
+ get_user(params.tstamp_type, &src->tstamp_type) ||
+ get_user(params.proto, &src->proto))
+ return -EFAULT;
+ /*
+ * Check silent_size parameter. Since we have 64bit boundary,
+ * silence_size must be compared with the 32bit boundary.
+ */
+ boundary = recalculate_boundary(substream->runtime);
+ if (boundary && params.silence_size >= boundary)
+ params.silence_size = substream->runtime->boundary;
+ err = snd_pcm_sw_params(substream, ¶ms);
+ if (err < 0)
+ return err;
+ if (boundary && put_user(boundary, &src->boundary))
+ return -EFAULT;
+ return err;
+}
+
+struct snd_pcm_channel_info32 {
+ u32 channel;
+ u32 offset;
+ u32 first;
+ u32 step;
+};
+
+static int snd_pcm_ioctl_channel_info_compat(struct snd_pcm_substream *substream,
+ struct snd_pcm_channel_info32 __user *src)
+{
+ struct snd_pcm_channel_info 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 snd_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;
+ u32 audio_tstamp_data;
+ struct compat_timespec audio_tstamp;
+ struct compat_timespec driver_tstamp;
+ u32 audio_tstamp_accuracy;
+ unsigned char reserved[52-2*sizeof(struct compat_timespec)];
+} __attribute__((packed));
+
+
+static int snd_pcm_status_user_compat(struct snd_pcm_substream *substream,
+ struct snd_pcm_status32 __user *src,
+ bool ext)
+{
+ struct snd_pcm_status status;
+ int err;
+
+ memset(&status, 0, sizeof(status));
+ /*
+ * with extension, parameters are read/write,
+ * get audio_tstamp_data from user,
+ * ignore rest of status structure
+ */
+ if (ext && get_user(status.audio_tstamp_data,
+ (u32 __user *)(&src->audio_tstamp_data)))
+ return -EFAULT;
+ err = snd_pcm_status(substream, &status);
+ if (err < 0)
+ return err;
+
+ if (clear_user(src, sizeof(*src)))
+ return -EFAULT;
+ if (put_user(status.state, &src->state) ||
+ compat_put_timespec(&status.trigger_tstamp, &src->trigger_tstamp) ||
+ compat_put_timespec(&status.tstamp, &src->tstamp) ||
+ 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) ||
+ put_user(status.audio_tstamp_data, &src->audio_tstamp_data) ||
+ compat_put_timespec(&status.audio_tstamp, &src->audio_tstamp) ||
+ compat_put_timespec(&status.driver_tstamp, &src->driver_tstamp) ||
+ put_user(status.audio_tstamp_accuracy, &src->audio_tstamp_accuracy))
+ return -EFAULT;
+
+ return err;
+}
+
+/* both for HW_PARAMS and HW_REFINE */
+static int snd_pcm_ioctl_hw_params_compat(struct snd_pcm_substream *substream,
+ int refine,
+ struct snd_pcm_hw_params32 __user *data32)
+{
+ struct snd_pcm_hw_params *data;
+ struct snd_pcm_runtime *runtime;
+ int err;
+
+ if (! (runtime = substream->runtime))
+ return -ENOTTY;
+
+ /* only fifo_size is different, so just copy all */
+ data = memdup_user(data32, sizeof(*data32));
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ 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) {
+ unsigned int new_boundary = recalculate_boundary(runtime);
+ if (new_boundary)
+ runtime->boundary = new_boundary;
+ }
+ error:
+ kfree(data);
+ return err;
+}
+
+
+/*
+ */
+struct snd_xferi32 {
+ s32 result;
+ u32 buf;
+ u32 frames;
+};
+
+static int snd_pcm_ioctl_xferi_compat(struct snd_pcm_substream *substream,
+ int dir, struct snd_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 snd_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(struct snd_pcm_substream *substream,
+ int dir, struct snd_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[i] = 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 snd_pcm_mmap_status32 {
+ s32 state;
+ s32 pad1;
+ u32 hw_ptr;
+ struct compat_timespec tstamp;
+ s32 suspended_state;
+ struct compat_timespec audio_tstamp;
+} __attribute__((packed));
+
+struct snd_pcm_mmap_control32 {
+ u32 appl_ptr;
+ u32 avail_min;
+};
+
+struct snd_pcm_sync_ptr32 {
+ u32 flags;
+ union {
+ struct snd_pcm_mmap_status32 status;
+ unsigned char reserved[64];
+ } s;
+ union {
+ struct snd_pcm_mmap_control32 control;
+ unsigned char reserved[64];
+ } c;
+} __attribute__((packed));
+
+static int snd_pcm_ioctl_sync_ptr_compat(struct snd_pcm_substream *substream,
+ struct snd_pcm_sync_ptr32 __user *src)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ volatile struct snd_pcm_mmap_status *status;
+ volatile struct snd_pcm_mmap_control *control;
+ u32 sflags;
+ struct snd_pcm_mmap_control scontrol;
+ struct snd_pcm_mmap_status sstatus;
+ snd_pcm_uframes_t boundary;
+ int err;
+
+ if (snd_BUG_ON(!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;
+ boundary = recalculate_boundary(runtime);
+ if (! boundary)
+ boundary = 0x7fffffff;
+ snd_pcm_stream_lock_irq(substream);
+ /* FIXME: we should consider the boundary for the sync from app */
+ if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL))
+ control->appl_ptr = scontrol.appl_ptr;
+ else
+ scontrol.appl_ptr = control->appl_ptr % boundary;
+ 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 % boundary;
+ sstatus.tstamp = status->tstamp;
+ sstatus.suspended_state = status->suspended_state;
+ sstatus.audio_tstamp = status->audio_tstamp;
+ 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) ||
+ compat_put_timespec(&sstatus.tstamp, &src->s.status.tstamp) ||
+ put_user(sstatus.suspended_state, &src->s.status.suspended_state) ||
+ compat_put_timespec(&sstatus.audio_tstamp,
+ &src->s.status.audio_tstamp) ||
+ 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 snd_pcm_hw_params32),
+ SNDRV_PCM_IOCTL_HW_PARAMS32 = _IOWR('A', 0x11, struct snd_pcm_hw_params32),
+ SNDRV_PCM_IOCTL_SW_PARAMS32 = _IOWR('A', 0x13, struct snd_pcm_sw_params32),
+ SNDRV_PCM_IOCTL_STATUS32 = _IOR('A', 0x20, struct snd_pcm_status32),
+ SNDRV_PCM_IOCTL_STATUS_EXT32 = _IOWR('A', 0x24, struct snd_pcm_status32),
+ SNDRV_PCM_IOCTL_DELAY32 = _IOR('A', 0x21, s32),
+ SNDRV_PCM_IOCTL_CHANNEL_INFO32 = _IOR('A', 0x32, struct snd_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 snd_xferi32),
+ SNDRV_PCM_IOCTL_READI_FRAMES32 = _IOR('A', 0x51, struct snd_xferi32),
+ SNDRV_PCM_IOCTL_WRITEN_FRAMES32 = _IOW('A', 0x52, struct snd_xfern32),
+ SNDRV_PCM_IOCTL_READN_FRAMES32 = _IOR('A', 0x53, struct snd_xfern32),
+ SNDRV_PCM_IOCTL_SYNC_PTR32 = _IOWR('A', 0x23, struct snd_pcm_sync_ptr32),
+
+};
+
+static long snd_pcm_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ struct snd_pcm_file *pcm_file;
+ struct snd_pcm_substream *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.
+ */
+ pcm_file->no_compat_mmap = 1;
+
+ switch (cmd) {
+ case SNDRV_PCM_IOCTL_PVERSION:
+ case SNDRV_PCM_IOCTL_INFO:
+ case SNDRV_PCM_IOCTL_TSTAMP:
+ case SNDRV_PCM_IOCTL_TTSTAMP:
+ 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(file, substream, cmd, argp);
+ else
+ return snd_pcm_capture_ioctl1(file, 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, false);
+ case SNDRV_PCM_IOCTL_STATUS_EXT32:
+ return snd_pcm_status_user_compat(substream, argp, true);
+ 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;
+}
Code Review / kvmfornfv.git / blobdiff