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Diffstat (limited to 'sound/firewire/amdtp-stream.h')
-rw-r--r--sound/firewire/amdtp-stream.h134
1 files changed, 92 insertions, 42 deletions
diff --git a/sound/firewire/amdtp-stream.h b/sound/firewire/amdtp-stream.h
index 703b710aaf7f..ec10270c2cce 100644
--- a/sound/firewire/amdtp-stream.h
+++ b/sound/firewire/amdtp-stream.h
@@ -32,9 +32,14 @@
* allows 5 times as large as IEC 61883-6 defines.
* @CIP_HEADER_WITHOUT_EOH: Only for in-stream. CIP Header doesn't include
* valid EOH.
- * @CIP_NO_HEADERS: a lack of headers in packets
+ * @CIP_NO_HEADER: a lack of headers in packets
* @CIP_UNALIGHED_DBC: Only for in-stream. The value of dbc is not alighed to
* the value of current SYT_INTERVAL; e.g. initial value is not zero.
+ * @CIP_UNAWARE_SYT: For outgoing packet, the value in SYT field of CIP is 0xffff.
+ * For incoming packet, the value in SYT field of CIP is not handled.
+ * @CIP_DBC_IS_PAYLOAD_QUADLETS: Available for incoming packet, and only effective with
+ * CIP_DBC_IS_END_EVENT flag. The value of dbc field is the number of accumulated quadlets
+ * in CIP payload, instead of the number of accumulated data blocks.
*/
enum cip_flags {
CIP_NONBLOCKING = 0x00,
@@ -48,6 +53,8 @@ enum cip_flags {
CIP_HEADER_WITHOUT_EOH = 0x80,
CIP_NO_HEADER = 0x100,
CIP_UNALIGHED_DBC = 0x200,
+ CIP_UNAWARE_SYT = 0x400,
+ CIP_DBC_IS_PAYLOAD_QUADLETS = 0x800,
};
/**
@@ -100,19 +107,20 @@ struct pkt_desc {
unsigned int data_blocks;
unsigned int data_block_counter;
__be32 *ctx_payload;
+ struct list_head link;
};
struct amdtp_stream;
-typedef unsigned int (*amdtp_stream_process_ctx_payloads_t)(
- struct amdtp_stream *s,
- const struct pkt_desc *desc,
- unsigned int packets,
- struct snd_pcm_substream *pcm);
+typedef void (*amdtp_stream_process_ctx_payloads_t)(struct amdtp_stream *s,
+ const struct pkt_desc *desc,
+ unsigned int count,
+ struct snd_pcm_substream *pcm);
struct amdtp_domain;
struct amdtp_stream {
struct fw_unit *unit;
- enum cip_flags flags;
+ // The combination of cip_flags enumeration-constants.
+ unsigned int flags;
enum amdtp_stream_direction direction;
struct mutex mutex;
@@ -121,7 +129,9 @@ struct amdtp_stream {
struct iso_packets_buffer buffer;
unsigned int queue_size;
int packet_index;
- struct pkt_desc *pkt_descs;
+ struct pkt_desc *packet_descs;
+ struct list_head packet_descs_list;
+ struct pkt_desc *packet_descs_cursor;
int tag;
union {
struct {
@@ -134,19 +144,36 @@ struct amdtp_stream {
// Fixed interval of dbc between previos/current
// packets.
unsigned int dbc_interval;
+
+ // The device starts multiplexing events to the packet.
+ bool event_starts;
+
+ struct {
+ struct seq_desc *descs;
+ unsigned int size;
+ unsigned int pos;
+ } cache;
} tx;
struct {
- // To calculate CIP data blocks and tstamp.
- unsigned int transfer_delay;
- unsigned int seq_index;
-
// To generate CIP header.
unsigned int fdf;
- int syt_override;
// To generate constant hardware IRQ.
unsigned int event_count;
- unsigned int events_per_period;
+
+ // To calculate CIP data blocks and tstamp.
+ struct {
+ struct seq_desc *descs;
+ unsigned int size;
+ unsigned int pos;
+ } seq;
+
+ unsigned int data_block_state;
+ unsigned int syt_offset_state;
+ unsigned int last_syt_offset;
+
+ struct amdtp_stream *replay_target;
+ unsigned int cache_pos;
} rx;
} ctx_data;
@@ -157,20 +184,23 @@ struct amdtp_stream {
unsigned int sph;
unsigned int fmt;
- /* Internal flags. */
+ // Internal flags.
+ unsigned int transfer_delay;
enum cip_sfc sfc;
unsigned int syt_interval;
/* For a PCM substream processing. */
struct snd_pcm_substream *pcm;
- struct tasklet_struct period_tasklet;
+ struct work_struct period_work;
snd_pcm_uframes_t pcm_buffer_pointer;
unsigned int pcm_period_pointer;
+ unsigned int pcm_frame_multiplier;
- /* To wait for first packet. */
- bool callbacked;
- wait_queue_head_t callback_wait;
- u32 start_cycle;
+ // To start processing content of packets at the same cycle in several contexts for
+ // each direction.
+ bool ready_processing;
+ wait_queue_head_t ready_wait;
+ unsigned int next_cycle;
/* For backends to process data blocks. */
void *protocol;
@@ -184,14 +214,14 @@ struct amdtp_stream {
};
int amdtp_stream_init(struct amdtp_stream *s, struct fw_unit *unit,
- enum amdtp_stream_direction dir, enum cip_flags flags,
+ enum amdtp_stream_direction dir, unsigned int flags,
unsigned int fmt,
amdtp_stream_process_ctx_payloads_t process_ctx_payloads,
unsigned int protocol_size);
void amdtp_stream_destroy(struct amdtp_stream *s);
int amdtp_stream_set_parameters(struct amdtp_stream *s, unsigned int rate,
- unsigned int data_block_quadlets);
+ unsigned int data_block_quadlets, unsigned int pcm_frame_multiplier);
unsigned int amdtp_stream_get_max_payload(struct amdtp_stream *s);
void amdtp_stream_update(struct amdtp_stream *s);
@@ -254,24 +284,19 @@ static inline void amdtp_stream_pcm_trigger(struct amdtp_stream *s,
WRITE_ONCE(s->pcm, pcm);
}
-static inline bool cip_sfc_is_base_44100(enum cip_sfc sfc)
-{
- return sfc & 1;
-}
-
/**
- * amdtp_stream_wait_callback - sleep till callbacked or timeout
+ * amdtp_stream_next_packet_desc - retrieve next descriptor for amdtp packet.
* @s: the AMDTP stream
- * @timeout: msec till timeout
+ * @desc: the descriptor of packet
*
- * If this function return false, the AMDTP stream should be stopped.
+ * This macro computes next descriptor so that the list of descriptors behaves circular queue.
*/
-static inline bool amdtp_stream_wait_callback(struct amdtp_stream *s,
- unsigned int timeout)
+#define amdtp_stream_next_packet_desc(s, desc) \
+ list_next_entry_circular(desc, &s->packet_descs_list, link)
+
+static inline bool cip_sfc_is_base_44100(enum cip_sfc sfc)
{
- return wait_event_timeout(s->callback_wait,
- s->callbacked == true,
- msecs_to_jiffies(timeout)) > 0;
+ return sfc & 1;
}
struct seq_desc {
@@ -287,13 +312,16 @@ struct amdtp_domain {
struct amdtp_stream *irq_target;
- struct seq_desc *seq_descs;
- unsigned int seq_size;
- unsigned int seq_tail;
+ struct {
+ unsigned int tx_init_skip;
+ unsigned int tx_start;
+ unsigned int rx_start;
+ } processing_cycle;
- unsigned int data_block_state;
- unsigned int syt_offset_state;
- unsigned int last_syt_offset;
+ struct {
+ bool enable:1;
+ bool on_the_fly:1;
+ } replay;
};
int amdtp_domain_init(struct amdtp_domain *d);
@@ -302,7 +330,8 @@ void amdtp_domain_destroy(struct amdtp_domain *d);
int amdtp_domain_add_stream(struct amdtp_domain *d, struct amdtp_stream *s,
int channel, int speed);
-int amdtp_domain_start(struct amdtp_domain *d, unsigned int ir_delay_cycle);
+int amdtp_domain_start(struct amdtp_domain *d, unsigned int tx_init_skip_cycles, bool replay_seq,
+ bool replay_on_the_fly);
void amdtp_domain_stop(struct amdtp_domain *d);
static inline int amdtp_domain_set_events_per_period(struct amdtp_domain *d,
@@ -319,4 +348,25 @@ unsigned long amdtp_domain_stream_pcm_pointer(struct amdtp_domain *d,
struct amdtp_stream *s);
int amdtp_domain_stream_pcm_ack(struct amdtp_domain *d, struct amdtp_stream *s);
+/**
+ * amdtp_domain_wait_ready - sleep till being ready to process packets or timeout
+ * @d: the AMDTP domain
+ * @timeout_ms: msec till timeout
+ *
+ * If this function return false, the AMDTP domain should be stopped.
+ */
+static inline bool amdtp_domain_wait_ready(struct amdtp_domain *d, unsigned int timeout_ms)
+{
+ struct amdtp_stream *s;
+
+ list_for_each_entry(s, &d->streams, list) {
+ unsigned int j = msecs_to_jiffies(timeout_ms);
+
+ if (wait_event_interruptible_timeout(s->ready_wait, s->ready_processing, j) <= 0)
+ return false;
+ }
+
+ return true;
+}
+
#endif
generated by cgit (git 2.34.1) at 2025-12-26 11:03:47 +0000