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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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172a0f5097
The module parameter defines number of iso packets per one URB. User is
allowed to set any value to the parameter of type int, which can lead to
various kinds of weird and incorrect behavior like integer overflows,
truncations, etc. Number of packets should be a small non-negative number.
Since this parameter is read-only, its value can be validated on driver
probe.
Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Signed-off-by: Murad Masimov <m.masimov@mt-integration.ru>
Link: https://patch.msgid.link/20250303100413.835-1-m.masimov@mt-integration.ru
Signed-off-by: Takashi Iwai <tiwai@suse.de>
115 lines
2.9 KiB
C
115 lines
2.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef USBUSX2Y_H
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#define USBUSX2Y_H
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#include "../usbaudio.h"
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#include "../midi.h"
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#include "usbus428ctldefs.h"
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#define NRURBS 2
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/* Default value used for nr of packs per urb.
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* 1 to 4 have been tested ok on uhci.
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* To use 3 on ohci, you'd need a patch:
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* look for "0000425-linux-2.6.9-rc4-mm1_ohci-hcd.patch.gz" on
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* "https://bugtrack.alsa-project.org/alsa-bug/bug_view_page.php?bug_id=0000425"
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*
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* 1, 2 and 4 work out of the box on ohci, if I recall correctly.
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* Bigger is safer operation, smaller gives lower latencies.
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*/
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#define USX2Y_NRPACKS 4
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#define USX2Y_NRPACKS_MAX 1024
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/* If your system works ok with this module's parameter
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* nrpacks set to 1, you might as well comment
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* this define out, and thereby produce smaller, faster code.
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* You'd also set USX2Y_NRPACKS to 1 then.
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*/
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#define USX2Y_NRPACKS_VARIABLE 1
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#ifdef USX2Y_NRPACKS_VARIABLE
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extern int nrpacks;
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#define nr_of_packs() nrpacks
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#else
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#define nr_of_packs() USX2Y_NRPACKS
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#endif
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#define URBS_ASYNC_SEQ 10
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#define URB_DATA_LEN_ASYNC_SEQ 32
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struct snd_usx2y_async_seq {
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struct urb *urb[URBS_ASYNC_SEQ];
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char *buffer;
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};
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struct snd_usx2y_urb_seq {
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int submitted;
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int len;
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struct urb *urb[] __counted_by(len);
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};
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#include "usx2yhwdeppcm.h"
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struct usx2ydev {
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struct usb_device *dev;
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int card_index;
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int stride;
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struct urb *in04_urb;
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void *in04_buf;
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char in04_last[24];
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unsigned int in04_int_calls;
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struct snd_usx2y_urb_seq *us04;
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wait_queue_head_t in04_wait_queue;
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struct snd_usx2y_async_seq as04;
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unsigned int rate,
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format;
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int chip_status;
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struct mutex pcm_mutex;
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struct us428ctls_sharedmem *us428ctls_sharedmem;
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int wait_iso_frame;
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wait_queue_head_t us428ctls_wait_queue_head;
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struct snd_usx2y_hwdep_pcm_shm *hwdep_pcm_shm;
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struct snd_usx2y_substream *subs[4];
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struct snd_usx2y_substream * volatile prepare_subs;
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wait_queue_head_t prepare_wait_queue;
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struct list_head midi_list;
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int pcm_devs;
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};
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struct snd_usx2y_substream {
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struct usx2ydev *usx2y;
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struct snd_pcm_substream *pcm_substream;
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int endpoint;
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unsigned int maxpacksize; /* max packet size in bytes */
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atomic_t state;
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#define STATE_STOPPED 0
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#define STATE_STARTING1 1
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#define STATE_STARTING2 2
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#define STATE_STARTING3 3
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#define STATE_PREPARED 4
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#define STATE_PRERUNNING 6
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#define STATE_RUNNING 8
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int hwptr; /* free frame position in the buffer (only for playback) */
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int hwptr_done; /* processed frame position in the buffer */
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int transfer_done; /* processed frames since last period update */
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struct urb *urb[NRURBS]; /* data urb table */
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struct urb *completed_urb;
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char *tmpbuf; /* temporary buffer for playback */
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};
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#define usx2y(c) ((struct usx2ydev *)(c)->private_data)
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int usx2y_audio_create(struct snd_card *card);
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int usx2y_async_seq04_init(struct usx2ydev *usx2y);
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int usx2y_in04_init(struct usx2ydev *usx2y);
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#define NAME_ALLCAPS "US-X2Y"
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#endif
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