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firmware: ti_sci: Allow for device shared and exclusive requests 

Sysfw provides an option for requesting exclusive access for a
device using the flags MSG_FLAG_DEVICE_EXCLUSIVE. If this flag is
not used, the device is meant to be shared across hosts. Once a device
is requested from a host with this flag set, any request to this
device from a different host will be nacked by sysfw. Current tisci
driver enables this flag for every device requests. But this may not
be true for all the devices. So provide a separate commands in driver
for exclusive and shared device requests.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
This commit is contained in:
Lokesh Vutla 2019-06-07 19:24:39 +05:30 committed by Tom Rini
parent bfe28bc70f
commit ae0b8a2bc8
2 changed files with 23 additions and 5 deletions
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25
drivers/firmware/ti_sci.c
View File

@ -547,8 +547,14 @@ static int ti_sci_get_device_state(const struct ti_sci_handle *handle,
*/
static int ti_sci_cmd_get_device(const struct ti_sci_handle *handle, u32 id)
{
return ti_sci_set_device_state(handle, id,
MSG_FLAG_DEVICE_EXCLUSIVE,
return ti_sci_set_device_state(handle, id, 0,
MSG_DEVICE_SW_STATE_ON);
}
static int ti_sci_cmd_get_device_exclusive(const struct ti_sci_handle *handle,
u32 id)
{
return ti_sci_set_device_state(handle, id, MSG_FLAG_DEVICE_EXCLUSIVE,
MSG_DEVICE_SW_STATE_ON);
}
@ -566,7 +572,14 @@ static int ti_sci_cmd_get_device(const struct ti_sci_handle *handle, u32 id)
static int ti_sci_cmd_idle_device(const struct ti_sci_handle *handle, u32 id)
{
return ti_sci_set_device_state(handle, id,
MSG_FLAG_DEVICE_EXCLUSIVE,
0,
MSG_DEVICE_SW_STATE_RETENTION);
}
static int ti_sci_cmd_idle_device_exclusive(const struct ti_sci_handle *handle,
u32 id)
{
return ti_sci_set_device_state(handle, id, MSG_FLAG_DEVICE_EXCLUSIVE,
MSG_DEVICE_SW_STATE_RETENTION);
}
@ -583,8 +596,8 @@ static int ti_sci_cmd_idle_device(const struct ti_sci_handle *handle, u32 id)
*/
static int ti_sci_cmd_put_device(const struct ti_sci_handle *handle, u32 id)
{
return ti_sci_set_device_state(handle, id,
0, MSG_DEVICE_SW_STATE_AUTO_OFF);
return ti_sci_set_device_state(handle, id, 0,
MSG_DEVICE_SW_STATE_AUTO_OFF);
}
/**
@ -2632,7 +2645,9 @@ static void ti_sci_setup_ops(struct ti_sci_info *info)
bops->board_config_pm = ti_sci_cmd_set_board_config_pm;
dops->get_device = ti_sci_cmd_get_device;
dops->get_device_exclusive = ti_sci_cmd_get_device_exclusive;
dops->idle_device = ti_sci_cmd_idle_device;
dops->idle_device_exclusive = ti_sci_cmd_idle_device_exclusive;
dops->put_device = ti_sci_cmd_put_device;
dops->is_valid = ti_sci_cmd_dev_is_valid;
dops->get_context_loss_count = ti_sci_cmd_dev_get_clcnt;

3
include/linux/soc/ti/ti_sci_protocol.h
View File

@ -117,7 +117,10 @@ struct ti_sci_board_ops {
*/
struct ti_sci_dev_ops {
int (*get_device)(const struct ti_sci_handle *handle, u32 id);
int (*get_device_exclusive)(const struct ti_sci_handle *handle, u32 id);
int (*idle_device)(const struct ti_sci_handle *handle, u32 id);
int (*idle_device_exclusive)(const struct ti_sci_handle *handle,
u32 id);
int (*put_device)(const struct ti_sci_handle *handle, u32 id);
int (*is_valid)(const struct ti_sci_handle *handle, u32 id);
int (*get_context_loss_count)(const struct ti_sci_handle *handle,