diff options
| author | Ioana Radulescu <ruxandra.radulescu@nxp.com> | 2019-08-28 17:08:15 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-08-29 16:52:12 -0700 |
| commit | 8eb3cef8d2642da6b72179da73344a442461cb58 (patch) | |
| tree | f6e8de8f120e74ff33c891224ce3bc45526b5326 /drivers/net/ethernet/freescale/dpaa2/dpni-cmd.h | |
| parent | cce62943c08ef9fcf3880d7babf76f9e86c9cdbd (diff) | |
dpaa2-eth: Add pause frame support
Starting with firmware version MC10.18.0, we have support for
L2 flow control. Asymmetrical configuration (Rx or Tx only) is
supported, but not pause frame autonegotioation.
Pause frame configuration is done via ethtool. By default, we start
with flow control enabled on both Rx and Tx. Changes are propagated
to hardware through firmware commands, using two flags (PAUSE,
ASYM_PAUSE) to specify Rx and Tx pause configuration, as follows:
PAUSE | ASYM_PAUSE | Rx pause | Tx pause
----------------------------------------
0 | 0 | disabled | disabled
0 | 1 | disabled | enabled
1 | 0 | enabled | enabled
1 | 1 | enabled | disabled
The hardware can automatically send pause frames when the number
of buffers in the pool goes below a predefined threshold. Due to
this, flow control is incompatible with Rx frame queue taildrop
(both mechanisms target the case when processing of ingress
frames can't keep up with the Rx rate; for large frames, the number
of buffers in the pool may never get low enough to trigger pause
frames as long as taildrop is enabled). So we set pause frame
generation and Rx FQ taildrop as mutually exclusive.
Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
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 | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/net/ethernet/freescale/dpaa2/dpni-cmd.h b/drivers/net/ethernet/freescale/dpaa2/dpni-cmd.h index 7b44d7d9b19a..d9b6918807af 100644 --- a/drivers/net/ethernet/freescale/dpaa2/dpni-cmd.h +++ b/drivers/net/ethernet/freescale/dpaa2/dpni-cmd.h @@ -84,6 +84,7 @@ #define DPNI_CMDID_SET_RX_FS_DIST DPNI_CMD(0x273) #define DPNI_CMDID_SET_RX_HASH_DIST DPNI_CMD(0x274) +#define DPNI_CMDID_GET_LINK_CFG DPNI_CMD(0x278) /* Macros for accessing command fields smaller than 1byte */ #define DPNI_MASK(field) \ @@ -284,7 +285,7 @@ struct dpni_rsp_get_statistics { __le64 counter[DPNI_STATISTICS_CNT]; }; -struct dpni_cmd_set_link_cfg { +struct dpni_cmd_link_cfg { /* cmd word 0 */ __le64 pad0; /* cmd word 1 */ |