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greybus: es2: implement shutdown callback 

Implement the shutdown callback which is used to execute shutdown
operations on offloaded connections.

This adds a new shutdown ARPC.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Johan Hovold 2016-08-26 12:55:48 +02:00 committed by Greg Kroah-Hartman
parent d2dee94b66
commit 77e52b3b0b
2 changed files with 34 additions and 0 deletions
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7
drivers/staging/greybus/arpc.h
View File

@ -81,6 +81,7 @@ struct arpc_response_message {
#define ARPC_TYPE_CPORT_QUIESCE 0x02
#define ARPC_TYPE_CPORT_CLEAR 0x03
#define ARPC_TYPE_CPORT_FLUSH 0x04
#define ARPC_TYPE_CPORT_SHUTDOWN 0x05
struct arpc_cport_reset_req {
__le16 cport_id;
@ -104,4 +105,10 @@ struct arpc_cport_flush_req {
__le16 cport_id;
} __packed;
struct arpc_cport_shutdown_req {
__le16 cport_id;
__le16 timeout;
__u8 phase;
} __packed;
#endif /* __ARPC_H */

27
drivers/staging/greybus/es2.c
View File

@ -783,6 +783,32 @@ static int es2_cport_flush(struct gb_host_device *hd, u16 cport_id)
return 0;
}
static int es2_cport_shutdown(struct gb_host_device *hd, u16 cport_id,
u8 phase, unsigned int timeout)
{
struct es2_ap_dev *es2 = hd_to_es2(hd);
struct device *dev = &es2->usb_dev->dev;
struct arpc_cport_shutdown_req req;
int result;
int ret;
if (timeout > U16_MAX)
return -EINVAL;
req.cport_id = cpu_to_le16(cport_id);
req.timeout = cpu_to_le16(timeout);
req.phase = phase;
ret = arpc_sync(es2, ARPC_TYPE_CPORT_SHUTDOWN, &req, sizeof(req),
&result, ES2_ARPC_CPORT_TIMEOUT + timeout);
if (ret) {
dev_err(dev, "failed to send shutdown over cport %u: %d (%d)\n",
cport_id, ret, result);
return ret;
}
return 0;
}
static int es2_cport_quiesce(struct gb_host_device *hd, u16 cport_id,
size_t peer_space, unsigned int timeout)
{
@ -1016,6 +1042,7 @@ static struct gb_hd_driver es2_driver = {
.cport_disable = cport_disable,
.cport_connected = es2_cport_connected,
.cport_flush = es2_cport_flush,
.cport_shutdown = es2_cport_shutdown,
.cport_quiesce = es2_cport_quiesce,
.cport_clear = es2_cport_clear,
.latency_tag_enable = latency_tag_enable,