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greybus: connection: add CSD connection flag

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Add CSD connection flag that can be specified when allocating a
connection to enable Controlled Segment Dropping in favour of E2EFC
which is enabled by default.

Note that most connections are expected to have E2EFC enabled.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Johan Hovold 2016-03-03 13:34:39 +01:00 committed by Greg Kroah-Hartman
parent 27f25c17ad
commit 64a6d13884
2 changed files with 8 additions and 1 deletions
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2
drivers/staging/greybus/connection.c
View File

@ -339,7 +339,7 @@ gb_connection_svc_connection_create(struct gb_connection *connection)
cport_flags = GB_SVC_CPORT_FLAG_CSV_N; cport_flags = GB_SVC_CPORT_FLAG_CSV_N;
if (intf->boot_over_unipro) { if (intf->boot_over_unipro) {
cport_flags |= GB_SVC_CPORT_FLAG_CSD_N; cport_flags |= GB_SVC_CPORT_FLAG_CSD_N;
} else { } else if (gb_connection_e2efc_enabled(connection)) {
cport_flags |= GB_SVC_CPORT_FLAG_CSD_N | cport_flags |= GB_SVC_CPORT_FLAG_CSD_N |
GB_SVC_CPORT_FLAG_E2EFC; GB_SVC_CPORT_FLAG_E2EFC;
} }

7
drivers/staging/greybus/connection.h
View File

@ -13,6 +13,8 @@
#include <linux/list.h> #include <linux/list.h>
#include <linux/kfifo.h> #include <linux/kfifo.h>
#define GB_CONNECTION_FLAG_CSD BIT(0)
enum gb_connection_state { enum gb_connection_state {
GB_CONNECTION_STATE_INVALID = 0, GB_CONNECTION_STATE_INVALID = 0,
GB_CONNECTION_STATE_DISABLED = 1, GB_CONNECTION_STATE_DISABLED = 1,
@ -81,4 +83,9 @@ void greybus_data_rcvd(struct gb_host_device *hd, u16 cport_id,
void gb_connection_latency_tag_enable(struct gb_connection *connection); void gb_connection_latency_tag_enable(struct gb_connection *connection);
void gb_connection_latency_tag_disable(struct gb_connection *connection); void gb_connection_latency_tag_disable(struct gb_connection *connection);
static inline bool gb_connection_e2efc_enabled(struct gb_connection *connection)
{
return !(connection->flags & GB_CONNECTION_FLAG_CSD);
}
#endif /* __CONNECTION_H */ #endif /* __CONNECTION_H */