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-rw-r--r--sound/firewire/amdtp-stream.c177
-rw-r--r--sound/firewire/amdtp-stream.h2
-rw-r--r--sound/firewire/motu/amdtp-motu.c9
3 files changed, 156 insertions, 32 deletions
diff --git a/sound/firewire/amdtp-stream.c b/sound/firewire/amdtp-stream.c
index b244fd863ca9..e9bdb609f2eb 100644
--- a/sound/firewire/amdtp-stream.c
+++ b/sound/firewire/amdtp-stream.c
@@ -894,14 +894,13 @@ static void process_ctx_payloads(struct amdtp_stream *s,
update_pcm_pointers(s, pcm, pcm_frames);
}
-static void out_stream_callback(struct fw_iso_context *context, u32 tstamp,
- size_t header_length, void *header,
- void *private_data)
+static void process_rx_packets(struct fw_iso_context *context, u32 tstamp, size_t header_length,
+ void *header, void *private_data)
{
struct amdtp_stream *s = private_data;
const struct amdtp_domain *d = s->domain;
const __be32 *ctx_header = header;
- unsigned int events_per_period = d->events_per_period;
+ const unsigned int events_per_period = d->events_per_period;
unsigned int event_count = s->ctx_data.rx.event_count;
unsigned int pkt_header_length;
unsigned int packets;
@@ -958,6 +957,89 @@ static void out_stream_callback(struct fw_iso_context *context, u32 tstamp,
s->ctx_data.rx.event_count = event_count;
}
+static void skip_rx_packets(struct fw_iso_context *context, u32 tstamp, size_t header_length,
+ void *header, void *private_data)
+{
+ struct amdtp_stream *s = private_data;
+ struct amdtp_domain *d = s->domain;
+ const __be32 *ctx_header = header;
+ unsigned int packets;
+ unsigned int cycle;
+ int i;
+
+ if (s->packet_index < 0)
+ return;
+
+ packets = header_length / sizeof(*ctx_header);
+
+ cycle = compute_ohci_it_cycle(ctx_header[packets - 1], s->queue_size);
+ s->next_cycle = increment_ohci_cycle_count(cycle, 1);
+
+ for (i = 0; i < packets; ++i) {
+ struct fw_iso_packet params = {
+ .header_length = 0,
+ .payload_length = 0,
+ };
+ bool sched_irq = (s == d->irq_target && i == packets - 1);
+
+ if (queue_out_packet(s, &params, sched_irq) < 0) {
+ cancel_stream(s);
+ return;
+ }
+ }
+}
+
+static void irq_target_callback(struct fw_iso_context *context, u32 tstamp, size_t header_length,
+ void *header, void *private_data);
+
+static void process_rx_packets_intermediately(struct fw_iso_context *context, u32 tstamp,
+ size_t header_length, void *header, void *private_data)
+{
+ struct amdtp_stream *s = private_data;
+ struct amdtp_domain *d = s->domain;
+ __be32 *ctx_header = header;
+ const unsigned int queue_size = s->queue_size;
+ unsigned int packets;
+ unsigned int offset;
+
+ if (s->packet_index < 0)
+ return;
+
+ packets = header_length / sizeof(*ctx_header);
+
+ offset = 0;
+ while (offset < packets) {
+ unsigned int cycle = compute_ohci_it_cycle(ctx_header[offset], queue_size);
+
+ if (compare_ohci_cycle_count(cycle, d->processing_cycle.rx_start) >= 0)
+ break;
+
+ ++offset;
+ }
+
+ if (offset > 0) {
+ unsigned int length = sizeof(*ctx_header) * offset;
+
+ skip_rx_packets(context, tstamp, length, ctx_header, private_data);
+ if (amdtp_streaming_error(s))
+ return;
+
+ ctx_header += offset;
+ header_length -= length;
+ }
+
+ if (offset < packets) {
+ process_rx_packets(context, tstamp, header_length, ctx_header, private_data);
+ if (amdtp_streaming_error(s))
+ return;
+
+ if (s == d->irq_target)
+ s->context->callback.sc = irq_target_callback;
+ else
+ s->context->callback.sc = process_rx_packets;
+ }
+}
+
static void process_tx_packets(struct fw_iso_context *context, u32 tstamp, size_t header_length,
void *header, void *private_data)
{
@@ -1116,34 +1198,22 @@ static void pool_ideal_seq_descs(struct amdtp_domain *d, unsigned int packets)
d->seq.tail = seq_tail;
}
-static void irq_target_callback(struct fw_iso_context *context, u32 tstamp,
- size_t header_length, void *header,
- void *private_data)
+static void process_ctxs_in_domain(struct amdtp_domain *d)
{
- struct amdtp_stream *irq_target = private_data;
- struct amdtp_domain *d = irq_target->domain;
- unsigned int packets = header_length / sizeof(__be32);
struct amdtp_stream *s;
- // Record enough entries with extra 3 cycles at least.
- pool_ideal_seq_descs(d, packets + 3);
-
- out_stream_callback(context, tstamp, header_length, header, irq_target);
- if (amdtp_streaming_error(irq_target))
- goto error;
-
list_for_each_entry(s, &d->streams, list) {
- if (s != irq_target && amdtp_stream_running(s)) {
+ if (s != d->irq_target && amdtp_stream_running(s))
fw_iso_context_flush_completions(s->context);
- if (amdtp_streaming_error(s))
- goto error;
- }
+
+ if (amdtp_streaming_error(s))
+ goto error;
}
return;
error:
- if (amdtp_stream_running(irq_target))
- cancel_stream(irq_target);
+ if (amdtp_stream_running(d->irq_target))
+ cancel_stream(d->irq_target);
list_for_each_entry(s, &d->streams, list) {
if (amdtp_stream_running(s))
@@ -1151,6 +1221,61 @@ error:
}
}
+static void irq_target_callback(struct fw_iso_context *context, u32 tstamp, size_t header_length,
+ void *header, void *private_data)
+{
+ struct amdtp_stream *s = private_data;
+ struct amdtp_domain *d = s->domain;
+ unsigned int packets = header_length / sizeof(__be32);
+
+ pool_ideal_seq_descs(d, packets);
+
+ process_rx_packets(context, tstamp, header_length, header, private_data);
+ process_ctxs_in_domain(d);
+}
+
+static void irq_target_callback_intermediately(struct fw_iso_context *context, u32 tstamp,
+ size_t header_length, void *header, void *private_data)
+{
+ struct amdtp_stream *s = private_data;
+ struct amdtp_domain *d = s->domain;
+ unsigned int packets = header_length / sizeof(__be32);
+
+ pool_ideal_seq_descs(d, packets);
+
+ process_rx_packets_intermediately(context, tstamp, header_length, header, private_data);
+ process_ctxs_in_domain(d);
+}
+
+static void irq_target_callback_skip(struct fw_iso_context *context, u32 tstamp,
+ size_t header_length, void *header, void *private_data)
+{
+ struct amdtp_stream *s = private_data;
+ struct amdtp_domain *d = s->domain;
+ unsigned int cycle;
+
+ skip_rx_packets(context, tstamp, header_length, header, private_data);
+ process_ctxs_in_domain(d);
+
+ // Decide the cycle count to begin processing content of packet in IT contexts. All of IT
+ // contexts are expected to start and get callback when reaching here.
+ cycle = s->next_cycle;
+ list_for_each_entry(s, &d->streams, list) {
+ if (s->direction != AMDTP_OUT_STREAM)
+ continue;
+
+ if (compare_ohci_cycle_count(s->next_cycle, cycle) > 0)
+ cycle = s->next_cycle;
+
+ if (s == d->irq_target)
+ s->context->callback.sc = irq_target_callback_intermediately;
+ else
+ s->context->callback.sc = process_rx_packets_intermediately;
+ }
+
+ d->processing_cycle.rx_start = cycle;
+}
+
// this is executed one time.
static void amdtp_stream_first_callback(struct fw_iso_context *context,
u32 tstamp, size_t header_length,
@@ -1176,13 +1301,11 @@ static void amdtp_stream_first_callback(struct fw_iso_context *context,
cycle = compute_ohci_it_cycle(*ctx_header, s->queue_size);
if (s == d->irq_target)
- context->callback.sc = irq_target_callback;
+ context->callback.sc = irq_target_callback_skip;
else
- context->callback.sc = out_stream_callback;
+ context->callback.sc = skip_rx_packets;
}
- s->start_cycle = cycle;
-
context->callback.sc(context, tstamp, header_length, header, s);
// Decide the cycle count to begin processing content of packet in IR contexts.
diff --git a/sound/firewire/amdtp-stream.h b/sound/firewire/amdtp-stream.h
index ebd040560791..7725d9793458 100644
--- a/sound/firewire/amdtp-stream.h
+++ b/sound/firewire/amdtp-stream.h
@@ -170,7 +170,6 @@ struct amdtp_stream {
/* To wait for first packet. */
bool callbacked;
wait_queue_head_t callback_wait;
- u32 start_cycle;
unsigned int next_cycle;
/* For backends to process data blocks. */
@@ -291,6 +290,7 @@ struct amdtp_domain {
struct {
unsigned int tx_init_skip;
unsigned int tx_start;
+ unsigned int rx_start;
} processing_cycle;
struct {
diff --git a/sound/firewire/motu/amdtp-motu.c b/sound/firewire/motu/amdtp-motu.c
index edb31ac26868..9ccde07d6295 100644
--- a/sound/firewire/motu/amdtp-motu.c
+++ b/sound/firewire/motu/amdtp-motu.c
@@ -377,8 +377,8 @@ static inline void compute_next_elapse_from_start(struct amdtp_motu *p)
p->next_seconds -= 128;
}
-static void write_sph(struct amdtp_stream *s, __be32 *buffer,
- unsigned int data_blocks)
+static void write_sph(struct amdtp_stream *s, __be32 *buffer, unsigned int data_blocks,
+ const unsigned int rx_start_cycle)
{
struct amdtp_motu *p = s->protocol;
unsigned int next_cycles;
@@ -386,7 +386,7 @@ static void write_sph(struct amdtp_stream *s, __be32 *buffer,
u32 sph;
for (i = 0; i < data_blocks; i++) {
- next_cycles = (s->start_cycle + p->next_cycles) % 8000;
+ next_cycles = (rx_start_cycle + p->next_cycles) % 8000;
sph = ((next_cycles << 12) | p->next_ticks) & 0x01ffffff;
*buffer = cpu_to_be32(sph);
@@ -401,6 +401,7 @@ static unsigned int process_it_ctx_payloads(struct amdtp_stream *s,
unsigned int packets,
struct snd_pcm_substream *pcm)
{
+ const unsigned int rx_start_cycle = s->domain->processing_cycle.rx_start;
struct amdtp_motu *p = s->protocol;
unsigned int pcm_frames = 0;
int i;
@@ -423,7 +424,7 @@ static unsigned int process_it_ctx_payloads(struct amdtp_stream *s,
// TODO: how to interact control messages between userspace?
- write_sph(s, buf, data_blocks);
+ write_sph(s, buf, data_blocks, rx_start_cycle);
}
// For tracepoints.
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-23 12:26:32 +0000