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i2s: add i2s_configure() as a system call

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Now that k_mem_slabs are tracked as kernel objects,
even though they have no user facing API, we can now
accept a pointer to one in the configure API.

Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
This commit is contained in:
Andrew Boie 2018-11-14 15:00:27 -08:00 • committed by Anas Nashif
commit ad4df685f1
2 changed files with 37 additions and 2 deletions
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32
drivers/i2s/i2s_handlers.c
View file

@ -8,6 +8,38 @@
#include <syscall_handler.h>
#include <i2s.h>
Z_SYSCALL_HANDLER(i2s_configure, dev, dir, cfg_ptr)
{
struct i2s_config config;
int ret = -EINVAL;
if (Z_SYSCALL_DRIVER_I2S(dev, configure)) {
goto out;
}
Z_OOPS(z_user_from_copy(&config, (void *)cfg_ptr,
sizeof(struct i2s_config)));
/* Check that the k_mem_slab provided is a valid pointer and that
* the caller has permission on it
*/
if (Z_SYSCALL_OBJ(config.mem_slab, K_OBJ_MEM_SLAB)) {
goto out;
}
/* Ensure that the k_mem_slab's slabs are large enough for the
* specified block size
*/
if (config.block_size > config.mem_slab->block_size) {
goto out;
}
ret = _impl_i2s_configure((struct device *)dev, dir, &config);
out:
return ret;
}
Z_SYSCALL_HANDLER(i2s_buf_read, dev, buf, size)
{
void *mem_block;

5
include/i2s.h
View file

@ -346,7 +346,10 @@ struct i2s_driver_api {
* @retval 0 If successful.
* @retval -EINVAL Invalid argument.
*/
static inline int i2s_configure(struct device *dev, enum i2s_dir dir,
__syscall int i2s_configure(struct device *dev, enum i2s_dir dir,
struct i2s_config *cfg);
static inline int _impl_i2s_configure(struct device *dev, enum i2s_dir dir,
struct i2s_config *cfg)
{
const struct i2s_driver_api *api = dev->driver_api;