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Re-enable trace filtering and implement DMA reset op#4793

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ranj063 wants to merge 4 commits into from
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Re-enable trace filtering and implement DMA reset op #4793

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61868ed
Revert "Revert "trace: Kconfig: disable filtering by default""
ranj063 Sep 21, 2021
7f3f8f1
DMA: add reset op
ranj063 Sep 22, 2021
5f5ff42
drivers: Intel: hda-dma: Implement reset op
ranj063 Sep 22, 2021
88795bd
trace: disable trace during CTX_SAVE IPC
ranj063 Sep 22, 2021
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9 changes: 9 additions & 0 deletions src/audio/dai.c
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Original file line numberDiff line numberDiff line change
Expand Up@@ -683,9 +683,18 @@ static int dai_reset(struct comp_dev *dev)
{
struct dai_data *dd = comp_get_drvdata(dev);
struct dma_sg_config *config = &dd->config;
int ret;

comp_info(dev, "dai_reset()");

if (dd->chan) {
ret = dma_reset(dd->chan);
if (ret < 0) {
comp_err(dev, "dai_reset(): failed to reset DMA chan");
return ret;
}
}

dai_config_reset(dev);

dma_sg_free(&config->elem_array);
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7 changes: 7 additions & 0 deletions src/audio/host.c
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Expand Up@@ -855,6 +855,13 @@ static int host_reset(struct comp_dev *dev)
comp_dbg(dev, "host_reset()");

if (hd->chan) {
int ret = dma_reset(hd->chan);

if (ret < 0) {
comp_err(dev, "host_reset(): failed to reset DMA chan");
return ret;
}

/* remove callback */
notifier_unregister(dev, hd->chan, NOTIFIER_ID_DMA_COPY);
dma_channel_put(hd->chan);
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36 changes: 29 additions & 7 deletions src/drivers/intel/hda/hda-dma.c
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Expand Up@@ -50,6 +50,7 @@ DECLARE_TR_CTX(hdma_tr, SOF_UUID(hda_dma_uuid), LOG_LEVEL_INFO);
#define DGCS_SCS BIT(31)
#define DGCS_GEN BIT(26)
#define DGCS_FWCB BIT(23)
#define DGCS_GBUSY BIT(15)
#define DGCS_BSC BIT(11)
/* NOTE: both XRUN bits are the same, just direction is different */
#define DGCS_BOR BIT(10) /* buffer overrun (input streams) */
Expand DownExpand Up@@ -522,7 +523,6 @@ static void hda_dma_channel_put(struct dma_chan_data *channel)
static int hda_dma_start(struct dma_chan_data *channel)
{
uint32_t flags;
uint32_t dgcs;
int ret = 0;

irq_local_disable(flags);
Expand All@@ -532,13 +532,12 @@ static int hda_dma_start(struct dma_chan_data *channel)

hda_dma_dbg_count_reset(channel);

/* is channel idle, disabled and ready ? */
dgcs = dma_chan_reg_read(channel, DGCS);
if (channel->status != COMP_STATE_PREPARE || (dgcs & DGCS_GEN)) {
/* is channel active? */
if (channel->status != COMP_STATE_PREPARE) {
ret = -EBUSY;
tr_err(&hdma_tr, "hda-dmac: %d channel %d busy. dgcs 0x%x status %d",
tr_err(&hdma_tr, "hda-dmac: %d channel %d status %d",
channel->dma->plat_data.id,
channel->index, dgcs, channel->status);
channel->index, channel->status);
goto out;
}

Expand DownExpand Up@@ -618,7 +617,7 @@ static int hda_dma_stop(struct dma_chan_data *channel)
hda_dma_host_stop(channel);

/* disable the channel */
dma_chan_reg_update_bits(channel, DGCS, DGCS_GEN | DGCS_FIFORDY, 0);
dma_chan_reg_update_bits(channel, DGCS, DGCS_FIFORDY, 0);
channel->status = COMP_STATE_PREPARE;
hda_chan = dma_chan_get_data(channel);
hda_chan->state = 0;
Expand All@@ -630,6 +629,28 @@ static int hda_dma_stop(struct dma_chan_data *channel)
return 0;
}

static int hda_dma_reset(struct dma_chan_data *channel)
{
uint32_t val, flags;

irq_local_disable(flags);

/* reset GEN bit */
dma_chan_reg_update_bits(channel, DGCS, DGCS_GEN, 0);

val = dma_chan_reg_read(channel, DGCS);

irq_local_enable(flags);

/* and verify if channel is idle */
if (!(val & DGCS_GBUSY))

@keyonjiekeyonjieSep 23, 2021•
edited
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Do we need some timeout check here to wait for the flushing finish?

@ranj063ranj063Sep 23, 2021

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@keyonjie I checked this in the cavs fw and they do not have a wait before checking for GBUSY

return 0;

tr_err(&hdma_tr, "hda-dmac: %d channel %d busy", channel->dma->plat_data.id,
channel->index);
return -EBUSY;
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}

/* fill in "status" with current DMA channel state and position */
static int hda_dma_status(struct dma_chan_data *channel,
struct dma_chan_status *status, uint8_t direction)
Expand DownExpand Up@@ -1004,6 +1025,7 @@ const struct dma_ops hda_link_dma_ops = {
.channel_put = hda_dma_channel_put,
.start = hda_dma_start,
.stop = hda_dma_stop,
.reset = hda_dma_reset,
.copy = hda_dma_link_copy,
.pause = hda_dma_pause,
.release = hda_dma_release,
Expand Down
9 changes: 9 additions & 0 deletions src/include/sof/lib/dma.h
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Expand Up@@ -160,6 +160,7 @@ struct dma_ops {

int (*start)(struct dma_chan_data *channel);
int (*stop)(struct dma_chan_data *channel);
int (*reset)(struct dma_chan_data *channel);
int (*copy)(struct dma_chan_data *channel, int bytes, uint32_t flags);
int (*pause)(struct dma_chan_data *channel);
int (*release)(struct dma_chan_data *channel);
Expand DownExpand Up@@ -318,6 +319,14 @@ static inline int dma_stop(struct dma_chan_data *channel)
return ret;
}

static inline int dma_reset(struct dma_chan_data *channel)
{
if (channel->dma->ops->reset)
return channel->dma->ops->reset(channel);

return 0;
}

/** \defgroup sof_dma_copy_func static int dma_copy (struct dma_chan_data * channel, int bytes, uint32_t flags)
*
* This function is in a separate subgroup to solve a name clash with
Expand Down
1 change: 1 addition & 0 deletions src/include/sof/trace/dma-trace.h
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Expand Up@@ -52,6 +52,7 @@ int dma_trace_host_buffer(struct dma_trace_data *d,
struct dma_sg_elem_array *elem_array,
uint32_t host_size);
int dma_trace_enable(struct dma_trace_data *d);
void dma_trace_disable(struct dma_trace_data *d);
void dma_trace_flush(void *destination);
void dma_trace_on(void);
void dma_trace_off(void);
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5 changes: 5 additions & 0 deletions src/ipc/ipc3/handler.c
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Expand Up@@ -602,6 +602,11 @@ static int ipc_pm_context_save(uint32_t header)
//struct sof_ipc_pm_ctx *pm_ctx = _ipc->comp_data;

tr_info(&ipc_tr, "ipc: pm -> save");
#if CONFIG_TRACE
struct dma_trace_data *dmat = dma_trace_data_get();

dma_trace_disable(dmat);
#endif

sa_exit(sof_get());

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6 changes: 3 additions & 3 deletions src/trace/Kconfig
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Expand Up@@ -35,22 +35,22 @@ config TRACEM
config TRACE_FILTERING
bool "Trace filtering"
depends on TRACE
default y
default n
help
Filtering of trace messages based on their verbosity level and frequency.

config TRACE_FILTERING_VERBOSITY
bool "Filter by verbosity"
depends on TRACE_FILTERING
default y
default n
help
Filtering by log verbosity level, where maximum verbosity allowed is specified for each
context and may be adjusted in runtime.

config TRACE_FILTERING_ADAPTIVE
bool "Adaptive rate limiting"
depends on TRACE_FILTERING
default y
default n
help
Adaptive filtering of trace messages, tracking up to CONFIG_TRACE_RECENT_ENTRIES_COUNT,
suppressing all repeated messages for up to CONFIG_TRACE_RECENT_TIME_THRESHOLD cycles.
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7 changes: 7 additions & 0 deletions src/trace/dma-trace.c
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Expand Up@@ -420,6 +420,13 @@ int dma_trace_enable(struct dma_trace_data *d)
return err;
}

void dma_trace_disable(struct dma_trace_data *d)
{
schedule_task_cancel(&d->dmat_work);
dma_reset(d->dc.chan);
dma_trace_buffer_free(d);
}

/** Sends all pending DMA messages to mailbox (for emergencies) */
void dma_trace_flush(void *t)
{
Expand Down