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    Subject[PATCH net-next v5 1/8] net: phylink: Document MAC_(A)SYM_PAUSE
    Date
    This documents the possible MLO_PAUSE_* settings which can result from
    different combinations of MLO_(A)SYM_PAUSE. These are more-or-less a
    direct consequence of IEEE 802.3 Table 28B-2.

    Signed-off-by: Sean Anderson <sean.anderson@seco.com>
    ---

    (no changes since v3)

    Changes in v3:
    - New

    include/linux/phylink.h | 16 ++++++++++++++++
    1 file changed, 16 insertions(+)

    diff --git a/include/linux/phylink.h b/include/linux/phylink.h
    index 6d06896fc20d..a431a0b0d217 100644
    --- a/include/linux/phylink.h
    +++ b/include/linux/phylink.h
    @@ -21,6 +21,22 @@ enum {
    MLO_AN_FIXED, /* Fixed-link mode */
    MLO_AN_INBAND, /* In-band protocol */

    + /* MAC_SYM_PAUSE and MAC_ASYM_PAUSE correspond to the PAUSE and
    + * ASM_DIR bits used in autonegotiation, respectively. See IEEE 802.3
    + * Annex 28B for more information.
    + *
    + * The following table lists the values of MLO_PAUSE_* (aside from
    + * MLO_PAUSE_AN) which might be requested depending on the results of
    + * autonegotiation or user configuration:
    + *
    + * MAC_SYM_PAUSE MAC_ASYM_PAUSE Valid pause modes
    + * ============= ============== ==============================
    + * 0 0 MLO_PAUSE_NONE
    + * 0 1 MLO_PAUSE_NONE, MLO_PAUSE_TX
    + * 1 0 MLO_PAUSE_NONE, MLO_PAUSE_TXRX
    + * 1 1 MLO_PAUSE_NONE, MLO_PAUSE_TXRX,
    + * MLO_PAUSE_RX
    + */
    MAC_SYM_PAUSE = BIT(0),
    MAC_ASYM_PAUSE = BIT(1),
    MAC_10HD = BIT(2),
    --
    2.35.1.1320.gc452695387.dirty
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