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stm class: Propagate source type to protocols

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Pass stm source type via stm_write() to allow different handling on
protocol level.

The measure above should allow protocol level encoder to differentiate
and accordingly pack the messages. As an example SyS-T might get use of
ftrace message ID's and instead of applying regular header, pack them
as SyS-T catalog or SyS-T Structured Binary Data message to allow proper
decoding on the other side.

Signed-off-by: Mikhail Lappo <miklelappo@gmail.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20240429130119.1518073-4-alexander.shishkin@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mikhail Lappo 2024-04-29 16:01:07 +03:00 committed by Greg Kroah-Hartman
parent 07cf835689
commit ee27f44e15
4 changed files with 9 additions and 7 deletions
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8
drivers/hwtracing/stm/core.c
View File

@ -600,7 +600,7 @@ EXPORT_SYMBOL_GPL(stm_data_write);
static ssize_t notrace
stm_write(struct stm_device *stm, struct stm_output *output,
unsigned int chan, const char *buf, size_t count)
unsigned int chan, const char *buf, size_t count, struct stm_source_data *source)
{
int err;
@ -608,7 +608,7 @@ stm_write(struct stm_device *stm, struct stm_output *output,
if (!stm->pdrv)
return -ENODEV;
err = stm->pdrv->write(stm->data, output, chan, buf, count);
err = stm->pdrv->write(stm->data, output, chan, buf, count, source);
if (err < 0)
return err;
@ -657,7 +657,7 @@ static ssize_t stm_char_write(struct file *file, const char __user *buf,
pm_runtime_get_sync(&stm->dev);
count = stm_write(stm, &stmf->output, 0, kbuf, count);
count = stm_write(stm, &stmf->output, 0, kbuf, count, NULL);
pm_runtime_mark_last_busy(&stm->dev);
pm_runtime_put_autosuspend(&stm->dev);
@ -1299,7 +1299,7 @@ int notrace stm_source_write(struct stm_source_data *data,
stm = srcu_dereference(src->link, &stm_source_srcu);
if (stm)
count = stm_write(stm, &src->output, chan, buf, count);
count = stm_write(stm, &src->output, chan, buf, count, data);
else
count = -ENODEV;

3
drivers/hwtracing/stm/p_basic.c
View File

@ -10,7 +10,8 @@
#include "stm.h"
static ssize_t basic_write(struct stm_data *data, struct stm_output *output,
unsigned int chan, const char *buf, size_t count)
unsigned int chan, const char *buf, size_t count,
struct stm_source_data *source)
{
unsigned int c = output->channel + chan;
unsigned int m = output->master;

3
drivers/hwtracing/stm/p_sys-t.c
View File

@ -285,7 +285,8 @@ sys_t_clock_sync(struct stm_data *data, unsigned int m, unsigned int c)
}
static ssize_t sys_t_write(struct stm_data *data, struct stm_output *output,
unsigned int chan, const char *buf, size_t count)
unsigned int chan, const char *buf, size_t count,
struct stm_source_data *source)
{
struct sys_t_output *op = output->pdrv_private;
unsigned int c = output->channel + chan;

2
drivers/hwtracing/stm/stm.h
View File

@ -96,7 +96,7 @@ struct stm_protocol_driver {
const char *name;
ssize_t (*write)(struct stm_data *data,
struct stm_output *output, unsigned int chan,
const char *buf, size_t count);
const char *buf, size_t count, struct stm_source_data *source);
void (*policy_node_init)(void *arg);
int (*output_open)(void *priv, struct stm_output *output);
void (*output_close)(struct stm_output *output);