![Ingo Molnar](/assets/img/avatar_default.png)
Fix up affected files that include this signal functionality via sched.h. Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
1286 lines
31 KiB
C
1286 lines
31 KiB
C
/*
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* dvb_demux.c - DVB kernel demux API
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*
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* Copyright (C) 2000-2001 Ralph Metzler <ralph@convergence.de>
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* & Marcus Metzler <marcus@convergence.de>
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* for convergence integrated media GmbH
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 2.1
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#define pr_fmt(fmt) "dvb_demux: " fmt
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#include <linux/sched/signal.h>
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#include <linux/spinlock.h>
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#include <linux/slab.h>
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#include <linux/vmalloc.h>
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#include <linux/module.h>
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#include <linux/poll.h>
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#include <linux/string.h>
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#include <linux/crc32.h>
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#include <linux/uaccess.h>
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#include <asm/div64.h>
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#include "dvb_demux.h"
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static int dvb_demux_tscheck;
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module_param(dvb_demux_tscheck, int, 0644);
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MODULE_PARM_DESC(dvb_demux_tscheck,
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"enable transport stream continuity and TEI check");
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static int dvb_demux_speedcheck;
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module_param(dvb_demux_speedcheck, int, 0644);
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MODULE_PARM_DESC(dvb_demux_speedcheck,
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"enable transport stream speed check");
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static int dvb_demux_feed_err_pkts = 1;
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module_param(dvb_demux_feed_err_pkts, int, 0644);
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MODULE_PARM_DESC(dvb_demux_feed_err_pkts,
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"when set to 0, drop packets with the TEI bit set (1 by default)");
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#define dprintk(fmt, arg...) \
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printk(KERN_DEBUG pr_fmt("%s: " fmt), __func__, ##arg)
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#define dprintk_tscheck(x...) do { \
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if (dvb_demux_tscheck && printk_ratelimit()) \
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dprintk(x); \
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} while (0)
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/******************************************************************************
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* static inlined helper functions
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******************************************************************************/
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static inline u16 section_length(const u8 *buf)
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{
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return 3 + ((buf[1] & 0x0f) << 8) + buf[2];
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}
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static inline u16 ts_pid(const u8 *buf)
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{
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return ((buf[1] & 0x1f) << 8) + buf[2];
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}
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static inline u8 payload(const u8 *tsp)
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{
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if (!(tsp[3] & 0x10)) // no payload?
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return 0;
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if (tsp[3] & 0x20) { // adaptation field?
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if (tsp[4] > 183) // corrupted data?
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return 0;
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else
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return 184 - 1 - tsp[4];
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}
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return 184;
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}
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static u32 dvb_dmx_crc32(struct dvb_demux_feed *f, const u8 *src, size_t len)
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{
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return (f->feed.sec.crc_val = crc32_be(f->feed.sec.crc_val, src, len));
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}
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static void dvb_dmx_memcopy(struct dvb_demux_feed *f, u8 *d, const u8 *s,
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size_t len)
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{
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memcpy(d, s, len);
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}
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/******************************************************************************
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* Software filter functions
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******************************************************************************/
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static inline int dvb_dmx_swfilter_payload(struct dvb_demux_feed *feed,
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const u8 *buf)
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{
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int count = payload(buf);
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int p;
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#ifdef CONFIG_DVB_DEMUX_SECTION_LOSS_LOG
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int ccok;
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u8 cc;
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#endif
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if (count == 0)
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return -1;
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p = 188 - count;
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#ifdef CONFIG_DVB_DEMUX_SECTION_LOSS_LOG
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cc = buf[3] & 0x0f;
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ccok = ((feed->cc + 1) & 0x0f) == cc;
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feed->cc = cc;
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if (!ccok)
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dprintk("missed packet!\n");
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#endif
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if (buf[1] & 0x40) // PUSI ?
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feed->peslen = 0xfffa;
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feed->peslen += count;
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return feed->cb.ts(&buf[p], count, NULL, 0, &feed->feed.ts);
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}
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static int dvb_dmx_swfilter_sectionfilter(struct dvb_demux_feed *feed,
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struct dvb_demux_filter *f)
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{
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u8 neq = 0;
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int i;
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for (i = 0; i < DVB_DEMUX_MASK_MAX; i++) {
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u8 xor = f->filter.filter_value[i] ^ feed->feed.sec.secbuf[i];
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if (f->maskandmode[i] & xor)
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return 0;
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neq |= f->maskandnotmode[i] & xor;
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}
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if (f->doneq && !neq)
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return 0;
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return feed->cb.sec(feed->feed.sec.secbuf, feed->feed.sec.seclen,
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NULL, 0, &f->filter);
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}
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static inline int dvb_dmx_swfilter_section_feed(struct dvb_demux_feed *feed)
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{
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struct dvb_demux *demux = feed->demux;
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struct dvb_demux_filter *f = feed->filter;
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struct dmx_section_feed *sec = &feed->feed.sec;
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int section_syntax_indicator;
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if (!sec->is_filtering)
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return 0;
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if (!f)
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return 0;
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if (sec->check_crc) {
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section_syntax_indicator = ((sec->secbuf[1] & 0x80) != 0);
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if (section_syntax_indicator &&
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demux->check_crc32(feed, sec->secbuf, sec->seclen))
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return -1;
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}
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do {
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if (dvb_dmx_swfilter_sectionfilter(feed, f) < 0)
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return -1;
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} while ((f = f->next) && sec->is_filtering);
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sec->seclen = 0;
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return 0;
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}
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static void dvb_dmx_swfilter_section_new(struct dvb_demux_feed *feed)
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{
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struct dmx_section_feed *sec = &feed->feed.sec;
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#ifdef CONFIG_DVB_DEMUX_SECTION_LOSS_LOG
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if (sec->secbufp < sec->tsfeedp) {
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int i, n = sec->tsfeedp - sec->secbufp;
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/*
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* Section padding is done with 0xff bytes entirely.
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* Due to speed reasons, we won't check all of them
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* but just first and last.
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*/
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if (sec->secbuf[0] != 0xff || sec->secbuf[n - 1] != 0xff) {
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dprintk("dvb_demux.c section ts padding loss: %d/%d\n",
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n, sec->tsfeedp);
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dprintk("dvb_demux.c pad data:");
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for (i = 0; i < n; i++)
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pr_cont(" %02x", sec->secbuf[i]);
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pr_cont("\n");
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}
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}
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#endif
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sec->tsfeedp = sec->secbufp = sec->seclen = 0;
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sec->secbuf = sec->secbuf_base;
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}
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/*
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* Losless Section Demux 1.4.1 by Emard
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* Valsecchi Patrick:
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* - middle of section A (no PUSI)
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* - end of section A and start of section B
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* (with PUSI pointing to the start of the second section)
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*
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* In this case, without feed->pusi_seen you'll receive a garbage section
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* consisting of the end of section A. Basically because tsfeedp
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* is incemented and the use=0 condition is not raised
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* when the second packet arrives.
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*
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* Fix:
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* when demux is started, let feed->pusi_seen = 0 to
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* prevent initial feeding of garbage from the end of
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* previous section. When you for the first time see PUSI=1
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* then set feed->pusi_seen = 1
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*/
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static int dvb_dmx_swfilter_section_copy_dump(struct dvb_demux_feed *feed,
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const u8 *buf, u8 len)
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{
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struct dvb_demux *demux = feed->demux;
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struct dmx_section_feed *sec = &feed->feed.sec;
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u16 limit, seclen, n;
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if (sec->tsfeedp >= DMX_MAX_SECFEED_SIZE)
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return 0;
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if (sec->tsfeedp + len > DMX_MAX_SECFEED_SIZE) {
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#ifdef CONFIG_DVB_DEMUX_SECTION_LOSS_LOG
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dprintk("dvb_demux.c section buffer full loss: %d/%d\n",
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sec->tsfeedp + len - DMX_MAX_SECFEED_SIZE,
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DMX_MAX_SECFEED_SIZE);
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#endif
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len = DMX_MAX_SECFEED_SIZE - sec->tsfeedp;
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}
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if (len <= 0)
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return 0;
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demux->memcopy(feed, sec->secbuf_base + sec->tsfeedp, buf, len);
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sec->tsfeedp += len;
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/*
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* Dump all the sections we can find in the data (Emard)
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*/
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limit = sec->tsfeedp;
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if (limit > DMX_MAX_SECFEED_SIZE)
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return -1; /* internal error should never happen */
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/* to be sure always set secbuf */
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sec->secbuf = sec->secbuf_base + sec->secbufp;
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for (n = 0; sec->secbufp + 2 < limit; n++) {
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seclen = section_length(sec->secbuf);
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if (seclen <= 0 || seclen > DMX_MAX_SECTION_SIZE
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|| seclen + sec->secbufp > limit)
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return 0;
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sec->seclen = seclen;
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sec->crc_val = ~0;
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/* dump [secbuf .. secbuf+seclen) */
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if (feed->pusi_seen)
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dvb_dmx_swfilter_section_feed(feed);
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#ifdef CONFIG_DVB_DEMUX_SECTION_LOSS_LOG
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else
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dprintk("dvb_demux.c pusi not seen, discarding section data\n");
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#endif
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sec->secbufp += seclen; /* secbufp and secbuf moving together is */
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sec->secbuf += seclen; /* redundant but saves pointer arithmetic */
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}
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return 0;
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}
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static int dvb_dmx_swfilter_section_packet(struct dvb_demux_feed *feed,
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const u8 *buf)
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{
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u8 p, count;
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int ccok, dc_i = 0;
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u8 cc;
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count = payload(buf);
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if (count == 0) /* count == 0 if no payload or out of range */
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return -1;
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p = 188 - count; /* payload start */
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cc = buf[3] & 0x0f;
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ccok = ((feed->cc + 1) & 0x0f) == cc;
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feed->cc = cc;
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if (buf[3] & 0x20) {
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/* adaption field present, check for discontinuity_indicator */
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if ((buf[4] > 0) && (buf[5] & 0x80))
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dc_i = 1;
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}
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if (!ccok || dc_i) {
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#ifdef CONFIG_DVB_DEMUX_SECTION_LOSS_LOG
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dprintk("dvb_demux.c discontinuity detected %d bytes lost\n",
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count);
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/*
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* those bytes under sume circumstances will again be reported
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* in the following dvb_dmx_swfilter_section_new
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*/
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#endif
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/*
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* Discontinuity detected. Reset pusi_seen = 0 to
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* stop feeding of suspicious data until next PUSI=1 arrives
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*/
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feed->pusi_seen = 0;
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dvb_dmx_swfilter_section_new(feed);
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}
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if (buf[1] & 0x40) {
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/* PUSI=1 (is set), section boundary is here */
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if (count > 1 && buf[p] < count) {
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const u8 *before = &buf[p + 1];
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u8 before_len = buf[p];
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const u8 *after = &before[before_len];
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u8 after_len = count - 1 - before_len;
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dvb_dmx_swfilter_section_copy_dump(feed, before,
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before_len);
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/* before start of new section, set pusi_seen = 1 */
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feed->pusi_seen = 1;
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dvb_dmx_swfilter_section_new(feed);
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dvb_dmx_swfilter_section_copy_dump(feed, after,
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after_len);
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}
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#ifdef CONFIG_DVB_DEMUX_SECTION_LOSS_LOG
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else if (count > 0)
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dprintk("dvb_demux.c PUSI=1 but %d bytes lost\n",
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count);
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#endif
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} else {
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/* PUSI=0 (is not set), no section boundary */
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dvb_dmx_swfilter_section_copy_dump(feed, &buf[p], count);
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}
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return 0;
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}
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static inline void dvb_dmx_swfilter_packet_type(struct dvb_demux_feed *feed,
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const u8 *buf)
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{
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switch (feed->type) {
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case DMX_TYPE_TS:
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if (!feed->feed.ts.is_filtering)
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break;
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if (feed->ts_type & TS_PACKET) {
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if (feed->ts_type & TS_PAYLOAD_ONLY)
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dvb_dmx_swfilter_payload(feed, buf);
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else
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feed->cb.ts(buf, 188, NULL, 0, &feed->feed.ts);
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}
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if (feed->ts_type & TS_DECODER)
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if (feed->demux->write_to_decoder)
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feed->demux->write_to_decoder(feed, buf, 188);
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break;
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case DMX_TYPE_SEC:
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if (!feed->feed.sec.is_filtering)
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break;
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if (dvb_dmx_swfilter_section_packet(feed, buf) < 0)
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feed->feed.sec.seclen = feed->feed.sec.secbufp = 0;
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break;
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default:
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break;
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}
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}
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#define DVR_FEED(f) \
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(((f)->type == DMX_TYPE_TS) && \
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((f)->feed.ts.is_filtering) && \
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(((f)->ts_type & (TS_PACKET | TS_DEMUX)) == TS_PACKET))
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static void dvb_dmx_swfilter_packet(struct dvb_demux *demux, const u8 *buf)
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{
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struct dvb_demux_feed *feed;
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u16 pid = ts_pid(buf);
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int dvr_done = 0;
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if (dvb_demux_speedcheck) {
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ktime_t cur_time;
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u64 speed_bytes, speed_timedelta;
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demux->speed_pkts_cnt++;
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/* show speed every SPEED_PKTS_INTERVAL packets */
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if (!(demux->speed_pkts_cnt % SPEED_PKTS_INTERVAL)) {
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cur_time = ktime_get();
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if (ktime_to_ns(demux->speed_last_time) != 0) {
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speed_bytes = (u64)demux->speed_pkts_cnt
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* 188 * 8;
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/* convert to 1024 basis */
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speed_bytes = 1000 * div64_u64(speed_bytes,
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1024);
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speed_timedelta = ktime_ms_delta(cur_time,
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demux->speed_last_time);
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dprintk("TS speed %llu Kbits/sec \n",
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div64_u64(speed_bytes,
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speed_timedelta));
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}
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demux->speed_last_time = cur_time;
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demux->speed_pkts_cnt = 0;
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}
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}
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if (buf[1] & 0x80) {
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dprintk_tscheck("TEI detected. PID=0x%x data1=0x%x\n",
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pid, buf[1]);
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/* data in this packet can't be trusted - drop it unless
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* module option dvb_demux_feed_err_pkts is set */
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if (!dvb_demux_feed_err_pkts)
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return;
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} else /* if TEI bit is set, pid may be wrong- skip pkt counter */
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if (demux->cnt_storage && dvb_demux_tscheck) {
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/* check pkt counter */
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if (pid < MAX_PID) {
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if (buf[3] & 0x10)
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demux->cnt_storage[pid] =
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(demux->cnt_storage[pid] + 1) & 0xf;
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if ((buf[3] & 0xf) != demux->cnt_storage[pid]) {
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dprintk_tscheck("TS packet counter mismatch. PID=0x%x expected 0x%x got 0x%x\n",
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pid, demux->cnt_storage[pid],
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buf[3] & 0xf);
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demux->cnt_storage[pid] = buf[3] & 0xf;
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}
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}
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/* end check */
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}
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list_for_each_entry(feed, &demux->feed_list, list_head) {
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if ((feed->pid != pid) && (feed->pid != 0x2000))
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continue;
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/* copy each packet only once to the dvr device, even
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* if a PID is in multiple filters (e.g. video + PCR) */
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if ((DVR_FEED(feed)) && (dvr_done++))
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continue;
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if (feed->pid == pid)
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dvb_dmx_swfilter_packet_type(feed, buf);
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else if (feed->pid == 0x2000)
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feed->cb.ts(buf, 188, NULL, 0, &feed->feed.ts);
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}
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}
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void dvb_dmx_swfilter_packets(struct dvb_demux *demux, const u8 *buf,
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size_t count)
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{
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unsigned long flags;
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spin_lock_irqsave(&demux->lock, flags);
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while (count--) {
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if (buf[0] == 0x47)
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dvb_dmx_swfilter_packet(demux, buf);
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buf += 188;
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}
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spin_unlock_irqrestore(&demux->lock, flags);
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}
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EXPORT_SYMBOL(dvb_dmx_swfilter_packets);
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static inline int find_next_packet(const u8 *buf, int pos, size_t count,
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const int pktsize)
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{
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int start = pos, lost;
|
|
|
|
while (pos < count) {
|
|
if (buf[pos] == 0x47 ||
|
|
(pktsize == 204 && buf[pos] == 0xB8))
|
|
break;
|
|
pos++;
|
|
}
|
|
|
|
lost = pos - start;
|
|
if (lost) {
|
|
/* This garbage is part of a valid packet? */
|
|
int backtrack = pos - pktsize;
|
|
if (backtrack >= 0 && (buf[backtrack] == 0x47 ||
|
|
(pktsize == 204 && buf[backtrack] == 0xB8)))
|
|
return backtrack;
|
|
}
|
|
|
|
return pos;
|
|
}
|
|
|
|
/* Filter all pktsize= 188 or 204 sized packets and skip garbage. */
|
|
static inline void _dvb_dmx_swfilter(struct dvb_demux *demux, const u8 *buf,
|
|
size_t count, const int pktsize)
|
|
{
|
|
int p = 0, i, j;
|
|
const u8 *q;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&demux->lock, flags);
|
|
|
|
if (demux->tsbufp) { /* tsbuf[0] is now 0x47. */
|
|
i = demux->tsbufp;
|
|
j = pktsize - i;
|
|
if (count < j) {
|
|
memcpy(&demux->tsbuf[i], buf, count);
|
|
demux->tsbufp += count;
|
|
goto bailout;
|
|
}
|
|
memcpy(&demux->tsbuf[i], buf, j);
|
|
if (demux->tsbuf[0] == 0x47) /* double check */
|
|
dvb_dmx_swfilter_packet(demux, demux->tsbuf);
|
|
demux->tsbufp = 0;
|
|
p += j;
|
|
}
|
|
|
|
while (1) {
|
|
p = find_next_packet(buf, p, count, pktsize);
|
|
if (p >= count)
|
|
break;
|
|
if (count - p < pktsize)
|
|
break;
|
|
|
|
q = &buf[p];
|
|
|
|
if (pktsize == 204 && (*q == 0xB8)) {
|
|
memcpy(demux->tsbuf, q, 188);
|
|
demux->tsbuf[0] = 0x47;
|
|
q = demux->tsbuf;
|
|
}
|
|
dvb_dmx_swfilter_packet(demux, q);
|
|
p += pktsize;
|
|
}
|
|
|
|
i = count - p;
|
|
if (i) {
|
|
memcpy(demux->tsbuf, &buf[p], i);
|
|
demux->tsbufp = i;
|
|
if (pktsize == 204 && demux->tsbuf[0] == 0xB8)
|
|
demux->tsbuf[0] = 0x47;
|
|
}
|
|
|
|
bailout:
|
|
spin_unlock_irqrestore(&demux->lock, flags);
|
|
}
|
|
|
|
void dvb_dmx_swfilter(struct dvb_demux *demux, const u8 *buf, size_t count)
|
|
{
|
|
_dvb_dmx_swfilter(demux, buf, count, 188);
|
|
}
|
|
EXPORT_SYMBOL(dvb_dmx_swfilter);
|
|
|
|
void dvb_dmx_swfilter_204(struct dvb_demux *demux, const u8 *buf, size_t count)
|
|
{
|
|
_dvb_dmx_swfilter(demux, buf, count, 204);
|
|
}
|
|
EXPORT_SYMBOL(dvb_dmx_swfilter_204);
|
|
|
|
void dvb_dmx_swfilter_raw(struct dvb_demux *demux, const u8 *buf, size_t count)
|
|
{
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&demux->lock, flags);
|
|
|
|
demux->feed->cb.ts(buf, count, NULL, 0, &demux->feed->feed.ts);
|
|
|
|
spin_unlock_irqrestore(&demux->lock, flags);
|
|
}
|
|
EXPORT_SYMBOL(dvb_dmx_swfilter_raw);
|
|
|
|
static struct dvb_demux_filter *dvb_dmx_filter_alloc(struct dvb_demux *demux)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < demux->filternum; i++)
|
|
if (demux->filter[i].state == DMX_STATE_FREE)
|
|
break;
|
|
|
|
if (i == demux->filternum)
|
|
return NULL;
|
|
|
|
demux->filter[i].state = DMX_STATE_ALLOCATED;
|
|
|
|
return &demux->filter[i];
|
|
}
|
|
|
|
static struct dvb_demux_feed *dvb_dmx_feed_alloc(struct dvb_demux *demux)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < demux->feednum; i++)
|
|
if (demux->feed[i].state == DMX_STATE_FREE)
|
|
break;
|
|
|
|
if (i == demux->feednum)
|
|
return NULL;
|
|
|
|
demux->feed[i].state = DMX_STATE_ALLOCATED;
|
|
|
|
return &demux->feed[i];
|
|
}
|
|
|
|
static int dvb_demux_feed_find(struct dvb_demux_feed *feed)
|
|
{
|
|
struct dvb_demux_feed *entry;
|
|
|
|
list_for_each_entry(entry, &feed->demux->feed_list, list_head)
|
|
if (entry == feed)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void dvb_demux_feed_add(struct dvb_demux_feed *feed)
|
|
{
|
|
spin_lock_irq(&feed->demux->lock);
|
|
if (dvb_demux_feed_find(feed)) {
|
|
pr_err("%s: feed already in list (type=%x state=%x pid=%x)\n",
|
|
__func__, feed->type, feed->state, feed->pid);
|
|
goto out;
|
|
}
|
|
|
|
list_add(&feed->list_head, &feed->demux->feed_list);
|
|
out:
|
|
spin_unlock_irq(&feed->demux->lock);
|
|
}
|
|
|
|
static void dvb_demux_feed_del(struct dvb_demux_feed *feed)
|
|
{
|
|
spin_lock_irq(&feed->demux->lock);
|
|
if (!(dvb_demux_feed_find(feed))) {
|
|
pr_err("%s: feed not in list (type=%x state=%x pid=%x)\n",
|
|
__func__, feed->type, feed->state, feed->pid);
|
|
goto out;
|
|
}
|
|
|
|
list_del(&feed->list_head);
|
|
out:
|
|
spin_unlock_irq(&feed->demux->lock);
|
|
}
|
|
|
|
static int dmx_ts_feed_set(struct dmx_ts_feed *ts_feed, u16 pid, int ts_type,
|
|
enum dmx_ts_pes pes_type, ktime_t timeout)
|
|
{
|
|
struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed;
|
|
struct dvb_demux *demux = feed->demux;
|
|
|
|
if (pid > DMX_MAX_PID)
|
|
return -EINVAL;
|
|
|
|
if (mutex_lock_interruptible(&demux->mutex))
|
|
return -ERESTARTSYS;
|
|
|
|
if (ts_type & TS_DECODER) {
|
|
if (pes_type >= DMX_PES_OTHER) {
|
|
mutex_unlock(&demux->mutex);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (demux->pesfilter[pes_type] &&
|
|
demux->pesfilter[pes_type] != feed) {
|
|
mutex_unlock(&demux->mutex);
|
|
return -EINVAL;
|
|
}
|
|
|
|
demux->pesfilter[pes_type] = feed;
|
|
demux->pids[pes_type] = pid;
|
|
}
|
|
|
|
dvb_demux_feed_add(feed);
|
|
|
|
feed->pid = pid;
|
|
feed->timeout = timeout;
|
|
feed->ts_type = ts_type;
|
|
feed->pes_type = pes_type;
|
|
|
|
feed->state = DMX_STATE_READY;
|
|
mutex_unlock(&demux->mutex);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dmx_ts_feed_start_filtering(struct dmx_ts_feed *ts_feed)
|
|
{
|
|
struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed;
|
|
struct dvb_demux *demux = feed->demux;
|
|
int ret;
|
|
|
|
if (mutex_lock_interruptible(&demux->mutex))
|
|
return -ERESTARTSYS;
|
|
|
|
if (feed->state != DMX_STATE_READY || feed->type != DMX_TYPE_TS) {
|
|
mutex_unlock(&demux->mutex);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!demux->start_feed) {
|
|
mutex_unlock(&demux->mutex);
|
|
return -ENODEV;
|
|
}
|
|
|
|
if ((ret = demux->start_feed(feed)) < 0) {
|
|
mutex_unlock(&demux->mutex);
|
|
return ret;
|
|
}
|
|
|
|
spin_lock_irq(&demux->lock);
|
|
ts_feed->is_filtering = 1;
|
|
feed->state = DMX_STATE_GO;
|
|
spin_unlock_irq(&demux->lock);
|
|
mutex_unlock(&demux->mutex);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dmx_ts_feed_stop_filtering(struct dmx_ts_feed *ts_feed)
|
|
{
|
|
struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed;
|
|
struct dvb_demux *demux = feed->demux;
|
|
int ret;
|
|
|
|
mutex_lock(&demux->mutex);
|
|
|
|
if (feed->state < DMX_STATE_GO) {
|
|
mutex_unlock(&demux->mutex);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!demux->stop_feed) {
|
|
mutex_unlock(&demux->mutex);
|
|
return -ENODEV;
|
|
}
|
|
|
|
ret = demux->stop_feed(feed);
|
|
|
|
spin_lock_irq(&demux->lock);
|
|
ts_feed->is_filtering = 0;
|
|
feed->state = DMX_STATE_ALLOCATED;
|
|
spin_unlock_irq(&demux->lock);
|
|
mutex_unlock(&demux->mutex);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int dvbdmx_allocate_ts_feed(struct dmx_demux *dmx,
|
|
struct dmx_ts_feed **ts_feed,
|
|
dmx_ts_cb callback)
|
|
{
|
|
struct dvb_demux *demux = (struct dvb_demux *)dmx;
|
|
struct dvb_demux_feed *feed;
|
|
|
|
if (mutex_lock_interruptible(&demux->mutex))
|
|
return -ERESTARTSYS;
|
|
|
|
if (!(feed = dvb_dmx_feed_alloc(demux))) {
|
|
mutex_unlock(&demux->mutex);
|
|
return -EBUSY;
|
|
}
|
|
|
|
feed->type = DMX_TYPE_TS;
|
|
feed->cb.ts = callback;
|
|
feed->demux = demux;
|
|
feed->pid = 0xffff;
|
|
feed->peslen = 0xfffa;
|
|
|
|
(*ts_feed) = &feed->feed.ts;
|
|
(*ts_feed)->parent = dmx;
|
|
(*ts_feed)->priv = NULL;
|
|
(*ts_feed)->is_filtering = 0;
|
|
(*ts_feed)->start_filtering = dmx_ts_feed_start_filtering;
|
|
(*ts_feed)->stop_filtering = dmx_ts_feed_stop_filtering;
|
|
(*ts_feed)->set = dmx_ts_feed_set;
|
|
|
|
if (!(feed->filter = dvb_dmx_filter_alloc(demux))) {
|
|
feed->state = DMX_STATE_FREE;
|
|
mutex_unlock(&demux->mutex);
|
|
return -EBUSY;
|
|
}
|
|
|
|
feed->filter->type = DMX_TYPE_TS;
|
|
feed->filter->feed = feed;
|
|
feed->filter->state = DMX_STATE_READY;
|
|
|
|
mutex_unlock(&demux->mutex);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dvbdmx_release_ts_feed(struct dmx_demux *dmx,
|
|
struct dmx_ts_feed *ts_feed)
|
|
{
|
|
struct dvb_demux *demux = (struct dvb_demux *)dmx;
|
|
struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed;
|
|
|
|
mutex_lock(&demux->mutex);
|
|
|
|
if (feed->state == DMX_STATE_FREE) {
|
|
mutex_unlock(&demux->mutex);
|
|
return -EINVAL;
|
|
}
|
|
|
|
feed->state = DMX_STATE_FREE;
|
|
feed->filter->state = DMX_STATE_FREE;
|
|
|
|
dvb_demux_feed_del(feed);
|
|
|
|
feed->pid = 0xffff;
|
|
|
|
if (feed->ts_type & TS_DECODER && feed->pes_type < DMX_PES_OTHER)
|
|
demux->pesfilter[feed->pes_type] = NULL;
|
|
|
|
mutex_unlock(&demux->mutex);
|
|
return 0;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* dmx_section_feed API calls
|
|
******************************************************************************/
|
|
|
|
static int dmx_section_feed_allocate_filter(struct dmx_section_feed *feed,
|
|
struct dmx_section_filter **filter)
|
|
{
|
|
struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed;
|
|
struct dvb_demux *dvbdemux = dvbdmxfeed->demux;
|
|
struct dvb_demux_filter *dvbdmxfilter;
|
|
|
|
if (mutex_lock_interruptible(&dvbdemux->mutex))
|
|
return -ERESTARTSYS;
|
|
|
|
dvbdmxfilter = dvb_dmx_filter_alloc(dvbdemux);
|
|
if (!dvbdmxfilter) {
|
|
mutex_unlock(&dvbdemux->mutex);
|
|
return -EBUSY;
|
|
}
|
|
|
|
spin_lock_irq(&dvbdemux->lock);
|
|
*filter = &dvbdmxfilter->filter;
|
|
(*filter)->parent = feed;
|
|
(*filter)->priv = NULL;
|
|
dvbdmxfilter->feed = dvbdmxfeed;
|
|
dvbdmxfilter->type = DMX_TYPE_SEC;
|
|
dvbdmxfilter->state = DMX_STATE_READY;
|
|
dvbdmxfilter->next = dvbdmxfeed->filter;
|
|
dvbdmxfeed->filter = dvbdmxfilter;
|
|
spin_unlock_irq(&dvbdemux->lock);
|
|
|
|
mutex_unlock(&dvbdemux->mutex);
|
|
return 0;
|
|
}
|
|
|
|
static int dmx_section_feed_set(struct dmx_section_feed *feed,
|
|
u16 pid, int check_crc)
|
|
{
|
|
struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed;
|
|
struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
|
|
|
|
if (pid > 0x1fff)
|
|
return -EINVAL;
|
|
|
|
if (mutex_lock_interruptible(&dvbdmx->mutex))
|
|
return -ERESTARTSYS;
|
|
|
|
dvb_demux_feed_add(dvbdmxfeed);
|
|
|
|
dvbdmxfeed->pid = pid;
|
|
dvbdmxfeed->feed.sec.check_crc = check_crc;
|
|
|
|
dvbdmxfeed->state = DMX_STATE_READY;
|
|
mutex_unlock(&dvbdmx->mutex);
|
|
return 0;
|
|
}
|
|
|
|
static void prepare_secfilters(struct dvb_demux_feed *dvbdmxfeed)
|
|
{
|
|
int i;
|
|
struct dvb_demux_filter *f;
|
|
struct dmx_section_filter *sf;
|
|
u8 mask, mode, doneq;
|
|
|
|
if (!(f = dvbdmxfeed->filter))
|
|
return;
|
|
do {
|
|
sf = &f->filter;
|
|
doneq = 0;
|
|
for (i = 0; i < DVB_DEMUX_MASK_MAX; i++) {
|
|
mode = sf->filter_mode[i];
|
|
mask = sf->filter_mask[i];
|
|
f->maskandmode[i] = mask & mode;
|
|
doneq |= f->maskandnotmode[i] = mask & ~mode;
|
|
}
|
|
f->doneq = doneq ? 1 : 0;
|
|
} while ((f = f->next));
|
|
}
|
|
|
|
static int dmx_section_feed_start_filtering(struct dmx_section_feed *feed)
|
|
{
|
|
struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed;
|
|
struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
|
|
int ret;
|
|
|
|
if (mutex_lock_interruptible(&dvbdmx->mutex))
|
|
return -ERESTARTSYS;
|
|
|
|
if (feed->is_filtering) {
|
|
mutex_unlock(&dvbdmx->mutex);
|
|
return -EBUSY;
|
|
}
|
|
|
|
if (!dvbdmxfeed->filter) {
|
|
mutex_unlock(&dvbdmx->mutex);
|
|
return -EINVAL;
|
|
}
|
|
|
|
dvbdmxfeed->feed.sec.tsfeedp = 0;
|
|
dvbdmxfeed->feed.sec.secbuf = dvbdmxfeed->feed.sec.secbuf_base;
|
|
dvbdmxfeed->feed.sec.secbufp = 0;
|
|
dvbdmxfeed->feed.sec.seclen = 0;
|
|
|
|
if (!dvbdmx->start_feed) {
|
|
mutex_unlock(&dvbdmx->mutex);
|
|
return -ENODEV;
|
|
}
|
|
|
|
prepare_secfilters(dvbdmxfeed);
|
|
|
|
if ((ret = dvbdmx->start_feed(dvbdmxfeed)) < 0) {
|
|
mutex_unlock(&dvbdmx->mutex);
|
|
return ret;
|
|
}
|
|
|
|
spin_lock_irq(&dvbdmx->lock);
|
|
feed->is_filtering = 1;
|
|
dvbdmxfeed->state = DMX_STATE_GO;
|
|
spin_unlock_irq(&dvbdmx->lock);
|
|
|
|
mutex_unlock(&dvbdmx->mutex);
|
|
return 0;
|
|
}
|
|
|
|
static int dmx_section_feed_stop_filtering(struct dmx_section_feed *feed)
|
|
{
|
|
struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed;
|
|
struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
|
|
int ret;
|
|
|
|
mutex_lock(&dvbdmx->mutex);
|
|
|
|
if (!dvbdmx->stop_feed) {
|
|
mutex_unlock(&dvbdmx->mutex);
|
|
return -ENODEV;
|
|
}
|
|
|
|
ret = dvbdmx->stop_feed(dvbdmxfeed);
|
|
|
|
spin_lock_irq(&dvbdmx->lock);
|
|
dvbdmxfeed->state = DMX_STATE_READY;
|
|
feed->is_filtering = 0;
|
|
spin_unlock_irq(&dvbdmx->lock);
|
|
|
|
mutex_unlock(&dvbdmx->mutex);
|
|
return ret;
|
|
}
|
|
|
|
static int dmx_section_feed_release_filter(struct dmx_section_feed *feed,
|
|
struct dmx_section_filter *filter)
|
|
{
|
|
struct dvb_demux_filter *dvbdmxfilter = (struct dvb_demux_filter *)filter, *f;
|
|
struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed;
|
|
struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
|
|
|
|
mutex_lock(&dvbdmx->mutex);
|
|
|
|
if (dvbdmxfilter->feed != dvbdmxfeed) {
|
|
mutex_unlock(&dvbdmx->mutex);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (feed->is_filtering) {
|
|
/* release dvbdmx->mutex as far as it is
|
|
acquired by stop_filtering() itself */
|
|
mutex_unlock(&dvbdmx->mutex);
|
|
feed->stop_filtering(feed);
|
|
mutex_lock(&dvbdmx->mutex);
|
|
}
|
|
|
|
spin_lock_irq(&dvbdmx->lock);
|
|
f = dvbdmxfeed->filter;
|
|
|
|
if (f == dvbdmxfilter) {
|
|
dvbdmxfeed->filter = dvbdmxfilter->next;
|
|
} else {
|
|
while (f->next != dvbdmxfilter)
|
|
f = f->next;
|
|
f->next = f->next->next;
|
|
}
|
|
|
|
dvbdmxfilter->state = DMX_STATE_FREE;
|
|
spin_unlock_irq(&dvbdmx->lock);
|
|
mutex_unlock(&dvbdmx->mutex);
|
|
return 0;
|
|
}
|
|
|
|
static int dvbdmx_allocate_section_feed(struct dmx_demux *demux,
|
|
struct dmx_section_feed **feed,
|
|
dmx_section_cb callback)
|
|
{
|
|
struct dvb_demux *dvbdmx = (struct dvb_demux *)demux;
|
|
struct dvb_demux_feed *dvbdmxfeed;
|
|
|
|
if (mutex_lock_interruptible(&dvbdmx->mutex))
|
|
return -ERESTARTSYS;
|
|
|
|
if (!(dvbdmxfeed = dvb_dmx_feed_alloc(dvbdmx))) {
|
|
mutex_unlock(&dvbdmx->mutex);
|
|
return -EBUSY;
|
|
}
|
|
|
|
dvbdmxfeed->type = DMX_TYPE_SEC;
|
|
dvbdmxfeed->cb.sec = callback;
|
|
dvbdmxfeed->demux = dvbdmx;
|
|
dvbdmxfeed->pid = 0xffff;
|
|
dvbdmxfeed->feed.sec.secbuf = dvbdmxfeed->feed.sec.secbuf_base;
|
|
dvbdmxfeed->feed.sec.secbufp = dvbdmxfeed->feed.sec.seclen = 0;
|
|
dvbdmxfeed->feed.sec.tsfeedp = 0;
|
|
dvbdmxfeed->filter = NULL;
|
|
|
|
(*feed) = &dvbdmxfeed->feed.sec;
|
|
(*feed)->is_filtering = 0;
|
|
(*feed)->parent = demux;
|
|
(*feed)->priv = NULL;
|
|
|
|
(*feed)->set = dmx_section_feed_set;
|
|
(*feed)->allocate_filter = dmx_section_feed_allocate_filter;
|
|
(*feed)->start_filtering = dmx_section_feed_start_filtering;
|
|
(*feed)->stop_filtering = dmx_section_feed_stop_filtering;
|
|
(*feed)->release_filter = dmx_section_feed_release_filter;
|
|
|
|
mutex_unlock(&dvbdmx->mutex);
|
|
return 0;
|
|
}
|
|
|
|
static int dvbdmx_release_section_feed(struct dmx_demux *demux,
|
|
struct dmx_section_feed *feed)
|
|
{
|
|
struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed;
|
|
struct dvb_demux *dvbdmx = (struct dvb_demux *)demux;
|
|
|
|
mutex_lock(&dvbdmx->mutex);
|
|
|
|
if (dvbdmxfeed->state == DMX_STATE_FREE) {
|
|
mutex_unlock(&dvbdmx->mutex);
|
|
return -EINVAL;
|
|
}
|
|
dvbdmxfeed->state = DMX_STATE_FREE;
|
|
|
|
dvb_demux_feed_del(dvbdmxfeed);
|
|
|
|
dvbdmxfeed->pid = 0xffff;
|
|
|
|
mutex_unlock(&dvbdmx->mutex);
|
|
return 0;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* dvb_demux kernel data API calls
|
|
******************************************************************************/
|
|
|
|
static int dvbdmx_open(struct dmx_demux *demux)
|
|
{
|
|
struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
|
|
|
|
if (dvbdemux->users >= MAX_DVB_DEMUX_USERS)
|
|
return -EUSERS;
|
|
|
|
dvbdemux->users++;
|
|
return 0;
|
|
}
|
|
|
|
static int dvbdmx_close(struct dmx_demux *demux)
|
|
{
|
|
struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
|
|
|
|
if (dvbdemux->users == 0)
|
|
return -ENODEV;
|
|
|
|
dvbdemux->users--;
|
|
//FIXME: release any unneeded resources if users==0
|
|
return 0;
|
|
}
|
|
|
|
static int dvbdmx_write(struct dmx_demux *demux, const char __user *buf, size_t count)
|
|
{
|
|
struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
|
|
void *p;
|
|
|
|
if ((!demux->frontend) || (demux->frontend->source != DMX_MEMORY_FE))
|
|
return -EINVAL;
|
|
|
|
p = memdup_user(buf, count);
|
|
if (IS_ERR(p))
|
|
return PTR_ERR(p);
|
|
if (mutex_lock_interruptible(&dvbdemux->mutex)) {
|
|
kfree(p);
|
|
return -ERESTARTSYS;
|
|
}
|
|
dvb_dmx_swfilter(dvbdemux, p, count);
|
|
kfree(p);
|
|
mutex_unlock(&dvbdemux->mutex);
|
|
|
|
if (signal_pending(current))
|
|
return -EINTR;
|
|
return count;
|
|
}
|
|
|
|
static int dvbdmx_add_frontend(struct dmx_demux *demux,
|
|
struct dmx_frontend *frontend)
|
|
{
|
|
struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
|
|
struct list_head *head = &dvbdemux->frontend_list;
|
|
|
|
list_add(&(frontend->connectivity_list), head);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dvbdmx_remove_frontend(struct dmx_demux *demux,
|
|
struct dmx_frontend *frontend)
|
|
{
|
|
struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
|
|
struct list_head *pos, *n, *head = &dvbdemux->frontend_list;
|
|
|
|
list_for_each_safe(pos, n, head) {
|
|
if (DMX_FE_ENTRY(pos) == frontend) {
|
|
list_del(pos);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return -ENODEV;
|
|
}
|
|
|
|
static struct list_head *dvbdmx_get_frontends(struct dmx_demux *demux)
|
|
{
|
|
struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
|
|
|
|
if (list_empty(&dvbdemux->frontend_list))
|
|
return NULL;
|
|
|
|
return &dvbdemux->frontend_list;
|
|
}
|
|
|
|
static int dvbdmx_connect_frontend(struct dmx_demux *demux,
|
|
struct dmx_frontend *frontend)
|
|
{
|
|
struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
|
|
|
|
if (demux->frontend)
|
|
return -EINVAL;
|
|
|
|
mutex_lock(&dvbdemux->mutex);
|
|
|
|
demux->frontend = frontend;
|
|
mutex_unlock(&dvbdemux->mutex);
|
|
return 0;
|
|
}
|
|
|
|
static int dvbdmx_disconnect_frontend(struct dmx_demux *demux)
|
|
{
|
|
struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
|
|
|
|
mutex_lock(&dvbdemux->mutex);
|
|
|
|
demux->frontend = NULL;
|
|
mutex_unlock(&dvbdemux->mutex);
|
|
return 0;
|
|
}
|
|
|
|
static int dvbdmx_get_pes_pids(struct dmx_demux *demux, u16 * pids)
|
|
{
|
|
struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
|
|
|
|
memcpy(pids, dvbdemux->pids, 5 * sizeof(u16));
|
|
return 0;
|
|
}
|
|
|
|
int dvb_dmx_init(struct dvb_demux *dvbdemux)
|
|
{
|
|
int i;
|
|
struct dmx_demux *dmx = &dvbdemux->dmx;
|
|
|
|
dvbdemux->cnt_storage = NULL;
|
|
dvbdemux->users = 0;
|
|
dvbdemux->filter = vmalloc(dvbdemux->filternum * sizeof(struct dvb_demux_filter));
|
|
|
|
if (!dvbdemux->filter)
|
|
return -ENOMEM;
|
|
|
|
dvbdemux->feed = vmalloc(dvbdemux->feednum * sizeof(struct dvb_demux_feed));
|
|
if (!dvbdemux->feed) {
|
|
vfree(dvbdemux->filter);
|
|
dvbdemux->filter = NULL;
|
|
return -ENOMEM;
|
|
}
|
|
for (i = 0; i < dvbdemux->filternum; i++) {
|
|
dvbdemux->filter[i].state = DMX_STATE_FREE;
|
|
dvbdemux->filter[i].index = i;
|
|
}
|
|
for (i = 0; i < dvbdemux->feednum; i++) {
|
|
dvbdemux->feed[i].state = DMX_STATE_FREE;
|
|
dvbdemux->feed[i].index = i;
|
|
}
|
|
|
|
dvbdemux->cnt_storage = vmalloc(MAX_PID + 1);
|
|
if (!dvbdemux->cnt_storage)
|
|
pr_warn("Couldn't allocate memory for TS/TEI check. Disabling it\n");
|
|
|
|
INIT_LIST_HEAD(&dvbdemux->frontend_list);
|
|
|
|
for (i = 0; i < DMX_PES_OTHER; i++) {
|
|
dvbdemux->pesfilter[i] = NULL;
|
|
dvbdemux->pids[i] = 0xffff;
|
|
}
|
|
|
|
INIT_LIST_HEAD(&dvbdemux->feed_list);
|
|
|
|
dvbdemux->playing = 0;
|
|
dvbdemux->recording = 0;
|
|
dvbdemux->tsbufp = 0;
|
|
|
|
if (!dvbdemux->check_crc32)
|
|
dvbdemux->check_crc32 = dvb_dmx_crc32;
|
|
|
|
if (!dvbdemux->memcopy)
|
|
dvbdemux->memcopy = dvb_dmx_memcopy;
|
|
|
|
dmx->frontend = NULL;
|
|
dmx->priv = dvbdemux;
|
|
dmx->open = dvbdmx_open;
|
|
dmx->close = dvbdmx_close;
|
|
dmx->write = dvbdmx_write;
|
|
dmx->allocate_ts_feed = dvbdmx_allocate_ts_feed;
|
|
dmx->release_ts_feed = dvbdmx_release_ts_feed;
|
|
dmx->allocate_section_feed = dvbdmx_allocate_section_feed;
|
|
dmx->release_section_feed = dvbdmx_release_section_feed;
|
|
|
|
dmx->add_frontend = dvbdmx_add_frontend;
|
|
dmx->remove_frontend = dvbdmx_remove_frontend;
|
|
dmx->get_frontends = dvbdmx_get_frontends;
|
|
dmx->connect_frontend = dvbdmx_connect_frontend;
|
|
dmx->disconnect_frontend = dvbdmx_disconnect_frontend;
|
|
dmx->get_pes_pids = dvbdmx_get_pes_pids;
|
|
|
|
mutex_init(&dvbdemux->mutex);
|
|
spin_lock_init(&dvbdemux->lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
EXPORT_SYMBOL(dvb_dmx_init);
|
|
|
|
void dvb_dmx_release(struct dvb_demux *dvbdemux)
|
|
{
|
|
vfree(dvbdemux->cnt_storage);
|
|
vfree(dvbdemux->filter);
|
|
vfree(dvbdemux->feed);
|
|
}
|
|
|
|
EXPORT_SYMBOL(dvb_dmx_release);
|