}
EXPORT_SYMBOL(snd_fw_schedule_registration);
-static void async_midi_port_callback(struct fw_card *card, int rcode,
- void *data, size_t length,
- void *callback_data)
-{
- struct snd_fw_async_midi_port *port = callback_data;
- struct snd_rawmidi_substream *substream = ACCESS_ONCE(port->substream);
-
- /* This port is closed. */
- if (substream == NULL)
- return;
-
- if (rcode == RCODE_COMPLETE)
- snd_rawmidi_transmit_ack(substream, port->consume_bytes);
- else if (!rcode_is_permanent_error(rcode))
- /* To start next transaction immediately for recovery. */
- port->next_ktime = 0;
- else
- /* Don't continue processing. */
- port->error = true;
-
- port->idling = true;
-
- if (!snd_rawmidi_transmit_empty(substream))
- schedule_work(&port->work);
-}
-
-static void midi_port_work(struct work_struct *work)
-{
- struct snd_fw_async_midi_port *port =
- container_of(work, struct snd_fw_async_midi_port, work);
- struct snd_rawmidi_substream *substream = ACCESS_ONCE(port->substream);
- int generation;
- int type;
-
- /* Under transacting or error state. */
- if (!port->idling || port->error)
- return;
-
- /* Nothing to do. */
- if (substream == NULL || snd_rawmidi_transmit_empty(substream))
- return;
-
- /* Do it in next chance. */
- if (ktime_after(port->next_ktime, ktime_get())) {
- schedule_work(&port->work);
- return;
- }
-
- /*
- * Fill the buffer. The callee must use snd_rawmidi_transmit_peek().
- * Later, snd_rawmidi_transmit_ack() is called.
- */
- memset(port->buf, 0, port->len);
- port->consume_bytes = port->fill(substream, port->buf);
- if (port->consume_bytes <= 0) {
- /* Do it in next chance, immediately. */
- if (port->consume_bytes == 0) {
- port->next_ktime = 0;
- schedule_work(&port->work);
- } else {
- /* Fatal error. */
- port->error = true;
- }
- return;
- }
-
- /* Calculate type of transaction. */
- if (port->len == 4)
- type = TCODE_WRITE_QUADLET_REQUEST;
- else
- type = TCODE_WRITE_BLOCK_REQUEST;
-
- /* Set interval to next transaction. */
- port->next_ktime = ktime_add_ns(ktime_get(),
- port->consume_bytes * 8 * NSEC_PER_SEC / 31250);
-
- /* Start this transaction. */
- port->idling = false;
-
- /*
- * In Linux FireWire core, when generation is updated with memory
- * barrier, node id has already been updated. In this module, After
- * this smp_rmb(), load/store instructions to memory are completed.
- * Thus, both of generation and node id are available with recent
- * values. This is a light-serialization solution to handle bus reset
- * events on IEEE 1394 bus.
- */
- generation = port->parent->generation;
- smp_rmb();
-
- fw_send_request(port->parent->card, &port->transaction, type,
- port->parent->node_id, generation,
- port->parent->max_speed, port->addr,
- port->buf, port->len, async_midi_port_callback,
- port);
-}
-
-/**
- * snd_fw_async_midi_port_init - initialize asynchronous MIDI port structure
- * @port: the asynchronous MIDI port to initialize
- * @unit: the target of the asynchronous transaction
- * @addr: the address to which transactions are transferred
- * @len: the length of transaction
- * @fill: the callback function to fill given buffer, and returns the
- * number of consumed bytes for MIDI message.
- *
- */
-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)
-{
- port->len = DIV_ROUND_UP(len, 4) * 4;
- port->buf = kzalloc(port->len, GFP_KERNEL);
- if (port->buf == NULL)
- return -ENOMEM;
-
- port->parent = fw_parent_device(unit);
- port->addr = addr;
- port->fill = fill;
- port->idling = true;
- port->next_ktime = 0;
- port->error = false;
-
- INIT_WORK(&port->work, midi_port_work);
-
- return 0;
-}
-EXPORT_SYMBOL(snd_fw_async_midi_port_init);
-
-/**
- * snd_fw_async_midi_port_destroy - free asynchronous MIDI port structure
- * @port: the asynchronous MIDI port structure
- */
-void snd_fw_async_midi_port_destroy(struct snd_fw_async_midi_port *port)
-{
- snd_fw_async_midi_port_finish(port);
- cancel_work_sync(&port->work);
- kfree(port->buf);
-}
-EXPORT_SYMBOL(snd_fw_async_midi_port_destroy);
-
MODULE_DESCRIPTION("FireWire audio helper functions");
MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
MODULE_LICENSE("GPL v2");
void snd_fw_schedule_registration(struct fw_unit *unit,
struct delayed_work *dwork);
-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;
- 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
return consume;
}
+static void async_midi_port_callback(struct fw_card *card, int rcode,
+ void *data, size_t length,
+ void *callback_data)
+{
+ struct snd_fw_async_midi_port *port = callback_data;
+ struct snd_rawmidi_substream *substream = ACCESS_ONCE(port->substream);
+
+ /* This port is closed. */
+ if (substream == NULL)
+ return;
+
+ if (rcode == RCODE_COMPLETE)
+ snd_rawmidi_transmit_ack(substream, port->consume_bytes);
+ else if (!rcode_is_permanent_error(rcode))
+ /* To start next transaction immediately for recovery. */
+ port->next_ktime = 0;
+ else
+ /* Don't continue processing. */
+ port->error = true;
+
+ port->idling = true;
+
+ if (!snd_rawmidi_transmit_empty(substream))
+ schedule_work(&port->work);
+}
+
+static void midi_port_work(struct work_struct *work)
+{
+ struct snd_fw_async_midi_port *port =
+ container_of(work, struct snd_fw_async_midi_port, work);
+ struct snd_rawmidi_substream *substream = ACCESS_ONCE(port->substream);
+ int generation;
+ int type;
+
+ /* Under transacting or error state. */
+ if (!port->idling || port->error)
+ return;
+
+ /* Nothing to do. */
+ if (substream == NULL || snd_rawmidi_transmit_empty(substream))
+ return;
+
+ /* Do it in next chance. */
+ if (ktime_after(port->next_ktime, ktime_get())) {
+ schedule_work(&port->work);
+ return;
+ }
+
+ /*
+ * Fill the buffer. The callee must use snd_rawmidi_transmit_peek().
+ * Later, snd_rawmidi_transmit_ack() is called.
+ */
+ memset(port->buf, 0, port->len);
+ port->consume_bytes = port->fill(substream, port->buf);
+ if (port->consume_bytes <= 0) {
+ /* Do it in next chance, immediately. */
+ if (port->consume_bytes == 0) {
+ port->next_ktime = 0;
+ schedule_work(&port->work);
+ } else {
+ /* Fatal error. */
+ port->error = true;
+ }
+ return;
+ }
+
+ /* Calculate type of transaction. */
+ if (port->len == 4)
+ type = TCODE_WRITE_QUADLET_REQUEST;
+ else
+ type = TCODE_WRITE_BLOCK_REQUEST;
+
+ /* Set interval to next transaction. */
+ port->next_ktime = ktime_add_ns(ktime_get(),
+ port->consume_bytes * 8 * NSEC_PER_SEC / 31250);
+
+ /* Start this transaction. */
+ port->idling = false;
+
+ /*
+ * In Linux FireWire core, when generation is updated with memory
+ * barrier, node id has already been updated. In this module, After
+ * this smp_rmb(), load/store instructions to memory are completed.
+ * Thus, both of generation and node id are available with recent
+ * values. This is a light-serialization solution to handle bus reset
+ * events on IEEE 1394 bus.
+ */
+ generation = port->parent->generation;
+ smp_rmb();
+
+ fw_send_request(port->parent->card, &port->transaction, type,
+ port->parent->node_id, generation,
+ port->parent->max_speed, port->addr,
+ port->buf, port->len, async_midi_port_callback,
+ port);
+}
+
+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)
+{
+ port->len = DIV_ROUND_UP(len, 4) * 4;
+ port->buf = kzalloc(port->len, GFP_KERNEL);
+ if (port->buf == NULL)
+ return -ENOMEM;
+
+ port->parent = fw_parent_device(unit);
+ port->addr = addr;
+ port->fill = fill;
+ port->idling = true;
+ port->next_ktime = 0;
+ port->error = false;
+
+ INIT_WORK(&port->work, midi_port_work);
+
+ return 0;
+}
+
+void snd_fw_async_midi_port_destroy(struct snd_fw_async_midi_port *port)
+{
+ snd_fw_async_midi_port_finish(port);
+ cancel_work_sync(&port->work);
+ kfree(port->buf);
+}
+
static void handle_midi_tx(struct fw_card *card, struct fw_request *request,
int tcode, int destination, int source,
int generation, unsigned long long offset,
#define TSCM_MIDI_IN_PORT_MAX 4
#define TSCM_MIDI_OUT_PORT_MAX 4
+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;
+ int consume_bytes;
+};
+
struct snd_tscm {
struct snd_card *card;
struct fw_unit *unit;
int snd_tscm_stream_lock_try(struct snd_tscm *tscm);
void snd_tscm_stream_lock_release(struct snd_tscm *tscm);
+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);
+
+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);
+ }
+}
+
+static inline void
+snd_fw_async_midi_port_finish(struct snd_fw_async_midi_port *port)
+{
+ port->substream = NULL;
+ port->error = false;
+}
+
int snd_tscm_transaction_register(struct snd_tscm *tscm);
int snd_tscm_transaction_reregister(struct snd_tscm *tscm);
void snd_tscm_transaction_unregister(struct snd_tscm *tscm);
projects / users / willy / pagecache.git / commitdiff