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[/] [or1k_soc_on_altera_embedded_dev_kit/] [trunk/] [linux-2.6/] [linux-2.6.24/] [sound/] [core/] [pcm_compat.c] - Rev 3
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/* * 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(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; unsigned char reserved[64]; }; /* 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)) 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; unsigned char reserved[60]; } __attribute__((packed)); static int snd_pcm_status_user_compat(struct snd_pcm_substream *substream, struct snd_pcm_status32 __user *src) { struct snd_pcm_status 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; } /* 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; 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) { 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[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 snd_pcm_mmap_status32 { s32 state; s32 pad1; u32 hw_ptr; struct compat_timespec tstamp; s32 suspended_state; } __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; 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; 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; 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 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_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_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); 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; }