bde3e2880f
Currently, when asynchronous transactions finish in error state and retries, work scheduling and work running also continues. This should be canceled at fatal error because it can cause endless loop. This commit enables to cancel transferring MIDI messages when transactions encounter fatal errors. This is achieved by setting error state. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
80 lines
1.9 KiB
C
80 lines
1.9 KiB
C
#ifndef SOUND_FIREWIRE_LIB_H_INCLUDED
|
|
#define SOUND_FIREWIRE_LIB_H_INCLUDED
|
|
|
|
#include <linux/firewire-constants.h>
|
|
#include <linux/types.h>
|
|
#include <linux/sched.h>
|
|
#include <sound/rawmidi.h>
|
|
|
|
struct fw_unit;
|
|
|
|
#define FW_GENERATION_MASK 0x00ff
|
|
#define FW_FIXED_GENERATION 0x0100
|
|
#define FW_QUIET 0x0200
|
|
|
|
int snd_fw_transaction(struct fw_unit *unit, int tcode,
|
|
u64 offset, void *buffer, size_t length,
|
|
unsigned int flags);
|
|
|
|
/* returns true if retrying the transaction would not make sense */
|
|
static inline bool rcode_is_permanent_error(int rcode)
|
|
{
|
|
return rcode == RCODE_TYPE_ERROR || rcode == RCODE_ADDRESS_ERROR;
|
|
}
|
|
|
|
struct snd_fw_async_midi_port;
|
|
typedef int (*snd_fw_async_midi_port_fill)(
|
|
struct snd_rawmidi_substream *substream,
|
|
u8 *buf);
|
|
|
|
struct snd_fw_async_midi_port {
|
|
struct fw_device *parent;
|
|
struct work_struct work;
|
|
bool idling;
|
|
ktime_t next_ktime;
|
|
bool error;
|
|
|
|
u64 addr;
|
|
struct fw_transaction transaction;
|
|
|
|
u8 *buf;
|
|
unsigned int len;
|
|
|
|
struct snd_rawmidi_substream *substream;
|
|
snd_fw_async_midi_port_fill fill;
|
|
unsigned int consume_bytes;
|
|
};
|
|
|
|
int snd_fw_async_midi_port_init(struct snd_fw_async_midi_port *port,
|
|
struct fw_unit *unit, u64 addr, unsigned int len,
|
|
snd_fw_async_midi_port_fill fill);
|
|
void snd_fw_async_midi_port_destroy(struct snd_fw_async_midi_port *port);
|
|
|
|
/**
|
|
* snd_fw_async_midi_port_run - run transactions for the async MIDI port
|
|
* @port: the asynchronous MIDI port
|
|
* @substream: the MIDI substream
|
|
*/
|
|
static inline void
|
|
snd_fw_async_midi_port_run(struct snd_fw_async_midi_port *port,
|
|
struct snd_rawmidi_substream *substream)
|
|
{
|
|
if (!port->error) {
|
|
port->substream = substream;
|
|
schedule_work(&port->work);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* snd_fw_async_midi_port_finish - finish the asynchronous MIDI port
|
|
* @port: the asynchronous MIDI port
|
|
*/
|
|
static inline void
|
|
snd_fw_async_midi_port_finish(struct snd_fw_async_midi_port *port)
|
|
{
|
|
port->substream = NULL;
|
|
port->error = false;
|
|
}
|
|
|
|
#endif
|