diff options
| author | Ioana Ciornei <ioana.ciornei@nxp.com> | 2020-05-31 00:08:13 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-06-01 12:04:32 -0700 |
| commit | f395b69f40f580491ef56f2395a98e3189baa53c (patch) | |
| tree | f41edf6ae72fc8ca4d39aa7ff4c49b4eaf350a9b /drivers/net/ethernet/freescale/dpaa2/dpni-cmd.h | |
| parent | 3f8b826d705fc6f0f0602fcbe6ee3b646ed3316e (diff) | |
dpaa2-eth: Add PFC support through DCB ops
Add support in dpaa2-eth for PFC (Priority Flow Control)
through the DCB ops.
Instruct the hardware to respond to received PFC frames.
Current firmware doesn't allow us to selectively enable PFC
on the Rx side for some priorities only, so we will react to
all incoming PFC frames (and stop transmitting on the traffic
classes specified in the frame).
Also, configure the hardware to generate PFC frames based on Rx
congestion notifications. When a certain number of frames accumulate in
the ingress queues corresponding to a traffic class, priority flow
control frames are generated for that TC.
The number of PFC traffic classes available can be queried through
lldptool. Also, which of those traffic classes have PFC enabled is also
controlled through the same dcbnl_rtnl_ops callbacks.
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/freescale/dpaa2/dpni-cmd.h')
| -rw-r--r-- | drivers/net/ethernet/freescale/dpaa2/dpni-cmd.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/net/ethernet/freescale/dpaa2/dpni-cmd.h b/drivers/net/ethernet/freescale/dpaa2/dpni-cmd.h index 0048e856f85e..fd069f67be9b 100644 --- a/drivers/net/ethernet/freescale/dpaa2/dpni-cmd.h +++ b/drivers/net/ethernet/freescale/dpaa2/dpni-cmd.h @@ -601,4 +601,29 @@ struct dpni_cmd_remove_qos_entry { __le64 mask_iova; }; +#define DPNI_DEST_TYPE_SHIFT 0 +#define DPNI_DEST_TYPE_SIZE 4 +#define DPNI_CONG_UNITS_SHIFT 4 +#define DPNI_CONG_UNITS_SIZE 2 + +struct dpni_cmd_set_congestion_notification { + /* cmd word 0 */ + u8 qtype; + u8 tc; + u8 pad[6]; + /* cmd word 1 */ + __le32 dest_id; + __le16 notification_mode; + u8 dest_priority; + /* from LSB: dest_type: 4 units:2 */ + u8 type_units; + /* cmd word 2 */ + __le64 message_iova; + /* cmd word 3 */ + __le64 message_ctx; + /* cmd word 4 */ + __le32 threshold_entry; + __le32 threshold_exit; +}; + #endif /* _FSL_DPNI_CMD_H */ |