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-rw-r--r--sound/firewire/amdtp-stream.c47
-rw-r--r--sound/firewire/amdtp-stream.h12
2 files changed, 42 insertions, 17 deletions
diff --git a/sound/firewire/amdtp-stream.c b/sound/firewire/amdtp-stream.c
index 5ecb449ff6fa..794ac693aae6 100644
--- a/sound/firewire/amdtp-stream.c
+++ b/sound/firewire/amdtp-stream.c
@@ -504,7 +504,7 @@ static unsigned int calculate_cached_cycle_count(struct amdtp_stream *s, unsigne
return cycles;
}
-static void cache_seq(struct amdtp_stream *s, const struct pkt_desc *descs, unsigned int desc_count)
+static void cache_seq(struct amdtp_stream *s, const struct pkt_desc *src, unsigned int desc_count)
{
const unsigned int transfer_delay = s->transfer_delay;
const unsigned int cache_size = s->ctx_data.tx.cache.size;
@@ -515,7 +515,6 @@ static void cache_seq(struct amdtp_stream *s, const struct pkt_desc *descs, unsi
for (i = 0; i < desc_count; ++i) {
struct seq_desc *dst = cache + cache_pos;
- const struct pkt_desc *src = descs + i;
if (aware_syt && src->syt != CIP_SYT_NO_INFO)
dst->syt_offset = compute_syt_offset(src->syt, src->cycle, transfer_delay);
@@ -524,6 +523,7 @@ static void cache_seq(struct amdtp_stream *s, const struct pkt_desc *descs, unsi
dst->data_blocks = src->data_blocks;
cache_pos = (cache_pos + 1) % cache_size;
+ src = amdtp_stream_next_packet_desc(s, src);
}
s->ctx_data.tx.cache.pos = cache_pos;
@@ -881,7 +881,7 @@ static inline u32 compute_ohci_it_cycle(const __be32 ctx_header_tstamp,
return increment_ohci_cycle_count(cycle, queue_size);
}
-static int generate_tx_packet_descs(struct amdtp_stream *s, struct pkt_desc *descs,
+static int generate_tx_packet_descs(struct amdtp_stream *s, struct pkt_desc *desc,
const __be32 *ctx_header, unsigned int packet_count,
unsigned int *desc_count)
{
@@ -894,7 +894,6 @@ static int generate_tx_packet_descs(struct amdtp_stream *s, struct pkt_desc *des
*desc_count = 0;
for (i = 0; i < packet_count; ++i) {
- struct pkt_desc *desc = descs + *desc_count;
unsigned int cycle;
bool lost;
unsigned int data_blocks;
@@ -918,7 +917,7 @@ static int generate_tx_packet_descs(struct amdtp_stream *s, struct pkt_desc *des
desc->data_blocks = 0;
desc->data_block_counter = dbc;
desc->ctx_payload = NULL;
- ++desc;
+ desc = amdtp_stream_next_packet_desc(s, desc);
++(*desc_count);
}
} else if (s->flags & CIP_JUMBO_PAYLOAD) {
@@ -951,6 +950,7 @@ static int generate_tx_packet_descs(struct amdtp_stream *s, struct pkt_desc *des
dbc = (dbc + desc->data_blocks) & 0xff;
next_cycle = increment_ohci_cycle_count(next_cycle, 1);
+ desc = amdtp_stream_next_packet_desc(s, desc);
++(*desc_count);
ctx_header += s->ctx_data.tx.ctx_header_size / sizeof(*ctx_header);
packet_index = (packet_index + 1) % queue_size;
@@ -973,7 +973,7 @@ static unsigned int compute_syt(unsigned int syt_offset, unsigned int cycle,
return syt & CIP_SYT_MASK;
}
-static void generate_rx_packet_descs(struct amdtp_stream *s, struct pkt_desc *descs,
+static void generate_rx_packet_descs(struct amdtp_stream *s, struct pkt_desc *desc,
const __be32 *ctx_header, unsigned int packet_count)
{
struct seq_desc *seq_descs = s->ctx_data.rx.seq.descs;
@@ -986,7 +986,6 @@ static void generate_rx_packet_descs(struct amdtp_stream *s, struct pkt_desc *de
pool_seq_descs(s, seq_descs, seq_size, seq_pos, packet_count);
for (i = 0; i < packet_count; ++i) {
- struct pkt_desc *desc = descs + i;
unsigned int index = (s->packet_index + i) % s->queue_size;
const struct seq_desc *seq = seq_descs + seq_pos;
@@ -1010,6 +1009,7 @@ static void generate_rx_packet_descs(struct amdtp_stream *s, struct pkt_desc *de
desc->ctx_payload = s->buffer.packets[index].buffer;
seq_pos = (seq_pos + 1) % seq_size;
+ desc = amdtp_stream_next_packet_desc(s, desc);
++ctx_header;
}
@@ -1047,6 +1047,7 @@ static void process_rx_packets(struct fw_iso_context *context, u32 tstamp, size_
const __be32 *ctx_header = header;
const unsigned int events_per_period = d->events_per_period;
unsigned int event_count = s->ctx_data.rx.event_count;
+ struct pkt_desc *desc = s->pkt_descs;
unsigned int pkt_header_length;
unsigned int packets;
bool need_hw_irq;
@@ -1058,9 +1059,9 @@ static void process_rx_packets(struct fw_iso_context *context, u32 tstamp, size_
// Calculate the number of packets in buffer and check XRUN.
packets = header_length / sizeof(*ctx_header);
- generate_rx_packet_descs(s, s->pkt_descs, ctx_header, packets);
+ generate_rx_packet_descs(s, desc, ctx_header, packets);
- process_ctx_payloads(s, s->pkt_descs, packets);
+ process_ctx_payloads(s, desc, packets);
if (!(s->flags & CIP_NO_HEADER))
pkt_header_length = IT_PKT_HEADER_SIZE_CIP;
@@ -1078,7 +1079,6 @@ static void process_rx_packets(struct fw_iso_context *context, u32 tstamp, size_
}
for (i = 0; i < packets; ++i) {
- const struct pkt_desc *desc = s->pkt_descs + i;
struct {
struct fw_iso_packet params;
__be32 header[CIP_HEADER_QUADLETS];
@@ -1101,6 +1101,8 @@ static void process_rx_packets(struct fw_iso_context *context, u32 tstamp, size_
cancel_stream(s);
return;
}
+
+ desc = amdtp_stream_next_packet_desc(s, desc);
}
s->ctx_data.rx.event_count = event_count;
@@ -1200,6 +1202,7 @@ static void process_tx_packets(struct fw_iso_context *context, u32 tstamp, size_
{
struct amdtp_stream *s = private_data;
__be32 *ctx_header = header;
+ struct pkt_desc *desc = s->pkt_descs;
unsigned int packet_count;
unsigned int desc_count;
int i;
@@ -1212,7 +1215,7 @@ static void process_tx_packets(struct fw_iso_context *context, u32 tstamp, size_
packet_count = header_length / s->ctx_data.tx.ctx_header_size;
desc_count = 0;
- err = generate_tx_packet_descs(s, s->pkt_descs, ctx_header, packet_count, &desc_count);
+ err = generate_tx_packet_descs(s, desc, ctx_header, packet_count, &desc_count);
if (err < 0) {
if (err != -EAGAIN) {
cancel_stream(s);
@@ -1221,10 +1224,10 @@ static void process_tx_packets(struct fw_iso_context *context, u32 tstamp, size_
} else {
struct amdtp_domain *d = s->domain;
- process_ctx_payloads(s, s->pkt_descs, desc_count);
+ process_ctx_payloads(s, desc, desc_count);
if (d->replay.enable)
- cache_seq(s, s->pkt_descs, desc_count);
+ cache_seq(s, desc, desc_count);
}
for (i = 0; i < packet_count; ++i) {
@@ -1547,7 +1550,8 @@ static int amdtp_stream_start(struct amdtp_stream *s, int channel, int speed,
unsigned int ctx_header_size;
unsigned int max_ctx_payload_size;
enum dma_data_direction dir;
- int type, tag, err;
+ struct pkt_desc *descs;
+ int i, type, tag, err;
mutex_lock(&s->mutex);
@@ -1655,12 +1659,19 @@ static int amdtp_stream_start(struct amdtp_stream *s, int channel, int speed,
else
s->tag = TAG_CIP;
- s->pkt_descs = kcalloc(s->queue_size, sizeof(*s->pkt_descs),
- GFP_KERNEL);
- if (!s->pkt_descs) {
+ descs = kcalloc(s->queue_size, sizeof(*descs), GFP_KERNEL);
+ if (!descs) {
err = -ENOMEM;
goto err_context;
}
+ s->pkt_descs = descs;
+
+ INIT_LIST_HEAD(&s->packet_descs_list);
+ for (i = 0; i < s->queue_size; ++i) {
+ INIT_LIST_HEAD(&descs->link);
+ list_add_tail(&descs->link, &s->packet_descs_list);
+ ++descs;
+ }
s->packet_index = 0;
do {
@@ -1700,6 +1711,7 @@ static int amdtp_stream_start(struct amdtp_stream *s, int channel, int speed,
return 0;
err_pkt_descs:
kfree(s->pkt_descs);
+ s->pkt_descs = NULL;
err_context:
if (s->direction == AMDTP_OUT_STREAM) {
kfree(s->ctx_data.rx.seq.descs);
@@ -1794,6 +1806,7 @@ static void amdtp_stream_stop(struct amdtp_stream *s)
s->context = ERR_PTR(-1);
iso_packets_buffer_destroy(&s->buffer, s->unit);
kfree(s->pkt_descs);
+ s->pkt_descs = NULL;
if (s->direction == AMDTP_OUT_STREAM) {
kfree(s->ctx_data.rx.seq.descs);
diff --git a/sound/firewire/amdtp-stream.h b/sound/firewire/amdtp-stream.h
index f021c1f49137..4bf701796166 100644
--- a/sound/firewire/amdtp-stream.h
+++ b/sound/firewire/amdtp-stream.h
@@ -103,6 +103,7 @@ struct pkt_desc {
unsigned int data_blocks;
unsigned int data_block_counter;
__be32 *ctx_payload;
+ struct list_head link;
};
struct amdtp_stream;
@@ -126,6 +127,7 @@ struct amdtp_stream {
unsigned int queue_size;
int packet_index;
struct pkt_desc *pkt_descs;
+ struct list_head packet_descs_list;
int tag;
union {
struct {
@@ -276,6 +278,16 @@ static inline void amdtp_stream_pcm_trigger(struct amdtp_stream *s,
WRITE_ONCE(s->pcm, pcm);
}
+/**
+ * amdtp_stream_next_packet_desc - retrieve next descriptor for amdtp packet.
+ * @s: the AMDTP stream
+ * @desc: the descriptor of packet
+ *
+ * This macro computes next descriptor so that the list of descriptors behaves circular queue.
+ */
+#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 sfc & 1;
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-28 19:52:17 +0300