write in 30M

hc

2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc

 kernel/sound/firewire/amdtp-stream.h
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@@ -33,6 +33,8 @@
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  * @CIP_HEADER_WITHOUT_EOH: Only for in-stream. CIP Header doesn't include
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  *	valid EOH.
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  * @CIP_NO_HEADERS: a lack of headers in packets
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+ * @CIP_UNALIGHED_DBC: Only for in-stream. The value of dbc is not alighed to
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+ *	the value of current SYT_INTERVAL; e.g. initial value is not zero.
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  */
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 enum cip_flags {
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 	CIP_NONBLOCKING		= 0x00,
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@@ -45,6 +47,7 @@
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 	CIP_JUMBO_PAYLOAD	= 0x40,
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 	CIP_HEADER_WITHOUT_EOH	= 0x80,
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 	CIP_NO_HEADER		= 0x100,
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+	CIP_UNALIGHED_DBC	= 0x200,
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 };
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 /**
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@@ -91,12 +94,22 @@
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 	AMDTP_IN_STREAM
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 };
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+struct pkt_desc {
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+	u32 cycle;
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+	u32 syt;
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+	unsigned int data_blocks;
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+	unsigned int data_block_counter;
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+	__be32 *ctx_payload;
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+};
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+
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 struct amdtp_stream;
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-typedef unsigned int (*amdtp_stream_process_data_blocks_t)(
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+typedef unsigned int (*amdtp_stream_process_ctx_payloads_t)(
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 						struct amdtp_stream *s,
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-						__be32 *buffer,
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-						unsigned int data_blocks,
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-						unsigned int *syt);
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+						const struct pkt_desc *desc,
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+						unsigned int packets,
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+						struct snd_pcm_substream *pcm);
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+
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+struct amdtp_domain;
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 struct amdtp_stream {
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 	struct fw_unit *unit;
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 	enum cip_flags flags;
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@@ -106,12 +119,36 @@
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 	/* For packet processing. */
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 	struct fw_iso_context *context;
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 	struct iso_packets_buffer buffer;
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+	unsigned int queue_size;
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 	int packet_index;
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+	struct pkt_desc *pkt_descs;
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 	int tag;
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-	int (*handle_packet)(struct amdtp_stream *s,
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-			unsigned int payload_quadlets, unsigned int cycle,
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-			unsigned int index);
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-	unsigned int max_payload_length;
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+	union {
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+		struct {
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+			unsigned int ctx_header_size;
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+
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+			// limit for payload of iso packet.
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+			unsigned int max_ctx_payload_length;
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+
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+			// For quirks of CIP headers.
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+			// Fixed interval of dbc between previos/current
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+			// packets.
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+			unsigned int dbc_interval;
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+		} tx;
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+		struct {
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+			// To calculate CIP data blocks and tstamp.
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+			unsigned int transfer_delay;
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+			unsigned int seq_index;
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+
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+			// To generate CIP header.
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+			unsigned int fdf;
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+			int syt_override;
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+
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+			// To generate constant hardware IRQ.
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+			unsigned int event_count;
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+			unsigned int events_per_period;
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+		} rx;
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+	} ctx_data;
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 	/* For CIP headers. */
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 	unsigned int source_node_id_field;
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@@ -119,23 +156,14 @@
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 	unsigned int data_block_counter;
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 	unsigned int sph;
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 	unsigned int fmt;
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-	unsigned int fdf;
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-	/* quirk: fixed interval of dbc between previos/current packets. */
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-	unsigned int tx_dbc_interval;
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-	/* quirk: indicate the value of dbc field in a first packet. */
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-	unsigned int tx_first_dbc;
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 	/* Internal flags. */
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 	enum cip_sfc sfc;
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 	unsigned int syt_interval;
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-	unsigned int transfer_delay;
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-	unsigned int data_block_state;
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-	unsigned int last_syt_offset;
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-	unsigned int syt_offset_state;
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 	/* For a PCM substream processing. */
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 	struct snd_pcm_substream *pcm;
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-	struct tasklet_struct period_tasklet;
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+	struct work_struct period_work;
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 	snd_pcm_uframes_t pcm_buffer_pointer;
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 	unsigned int pcm_period_pointer;
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@@ -146,13 +174,19 @@
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 	/* For backends to process data blocks. */
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 	void *protocol;
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-	amdtp_stream_process_data_blocks_t process_data_blocks;
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+	amdtp_stream_process_ctx_payloads_t process_ctx_payloads;
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+
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+	// For domain.
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+	int channel;
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+	int speed;
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+	struct list_head list;
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+	struct amdtp_domain *domain;
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 };
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 int amdtp_stream_init(struct amdtp_stream *s, struct fw_unit *unit,
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 		      enum amdtp_stream_direction dir, enum cip_flags flags,
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 		      unsigned int fmt,
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-		      amdtp_stream_process_data_blocks_t process_data_blocks,
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+		      amdtp_stream_process_ctx_payloads_t process_ctx_payloads,
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 		      unsigned int protocol_size);
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 void amdtp_stream_destroy(struct amdtp_stream *s);
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@@ -160,16 +194,12 @@
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 				unsigned int data_block_quadlets);
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 unsigned int amdtp_stream_get_max_payload(struct amdtp_stream *s);
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-int amdtp_stream_start(struct amdtp_stream *s, int channel, int speed);
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 void amdtp_stream_update(struct amdtp_stream *s);
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-void amdtp_stream_stop(struct amdtp_stream *s);
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 int amdtp_stream_add_pcm_hw_constraints(struct amdtp_stream *s,
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 					struct snd_pcm_runtime *runtime);
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 void amdtp_stream_pcm_prepare(struct amdtp_stream *s);
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-unsigned long amdtp_stream_pcm_pointer(struct amdtp_stream *s);
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-int amdtp_stream_pcm_ack(struct amdtp_stream *s);
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 void amdtp_stream_pcm_abort(struct amdtp_stream *s);
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 extern const unsigned int amdtp_syt_intervals[CIP_SFC_COUNT];
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@@ -244,4 +274,49 @@
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 				  msecs_to_jiffies(timeout)) > 0;
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 }
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+struct seq_desc {
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+	unsigned int syt_offset;
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+	unsigned int data_blocks;
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+};
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+
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+struct amdtp_domain {
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+	struct list_head streams;
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+
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+	unsigned int events_per_period;
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+	unsigned int events_per_buffer;
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+
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+	struct amdtp_stream *irq_target;
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+
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+	struct seq_desc *seq_descs;
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+	unsigned int seq_size;
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+	unsigned int seq_tail;
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+
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+	unsigned int data_block_state;
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+	unsigned int syt_offset_state;
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+	unsigned int last_syt_offset;
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+};
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+
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+int amdtp_domain_init(struct amdtp_domain *d);
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+void amdtp_domain_destroy(struct amdtp_domain *d);
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+
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+int amdtp_domain_add_stream(struct amdtp_domain *d, struct amdtp_stream *s,
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+			    int channel, int speed);
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+
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+int amdtp_domain_start(struct amdtp_domain *d, unsigned int ir_delay_cycle);
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+void amdtp_domain_stop(struct amdtp_domain *d);
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+
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+static inline int amdtp_domain_set_events_per_period(struct amdtp_domain *d,
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+						unsigned int events_per_period,
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+						unsigned int events_per_buffer)
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+{
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+	d->events_per_period = events_per_period;
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+	d->events_per_buffer = events_per_buffer;
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+
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+	return 0;
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+}
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+
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+unsigned long amdtp_domain_stream_pcm_pointer(struct amdtp_domain *d,
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+					      struct amdtp_stream *s);
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+int amdtp_domain_stream_pcm_ack(struct amdtp_domain *d, struct amdtp_stream *s);
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+
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 #endif