diff options
| author | Vladimir Oltean <vladimir.oltean@nxp.com> | 2021-01-15 04:11:12 +0200 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2021-01-15 20:02:34 -0800 |
| commit | 703b762190e643bf46a048ebe99504b14d71449c (patch) | |
| tree | d378d88772977df7f7f7e42b516b21e1f1b67dbe /drivers/net/dsa/ocelot/seville_vsc9953.c | |
| parent | f6fe01d6fa24dd3c89996ad82780872441e86bfa (diff) | |
net: mscc: ocelot: add ops for decoding watermark threshold and occupancy
We'll need to read back the watermark thresholds and occupancy from
hardware (for devlink-sb integration), not only to write them as we did
so far in ocelot_port_set_maxlen. So introduce 2 new functions in struct
ocelot_ops, similar to wm_enc, and implement them for the 3 supported
mscc_ocelot switches.
Remove the INUSE and MAXUSE unpacking helpers for the QSYS_RES_STAT
register, because that doesn't scale with the number of switches that
mscc_ocelot supports now. They have different bit widths for the
watermarks, and we need function pointers to abstract that difference
away.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net/dsa/ocelot/seville_vsc9953.c')
| -rw-r--r-- | drivers/net/dsa/ocelot/seville_vsc9953.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/net/dsa/ocelot/seville_vsc9953.c b/drivers/net/dsa/ocelot/seville_vsc9953.c index b72813da6d9f..8dad0c894eca 100644 --- a/drivers/net/dsa/ocelot/seville_vsc9953.c +++ b/drivers/net/dsa/ocelot/seville_vsc9953.c @@ -1057,9 +1057,27 @@ static u16 vsc9953_wm_enc(u16 value) return value; } +static u16 vsc9953_wm_dec(u16 wm) +{ + WARN_ON(wm & ~GENMASK(9, 0)); + + if (wm & BIT(9)) + return (wm & GENMASK(8, 0)) * 16; + + return wm; +} + +static void vsc9953_wm_stat(u32 val, u32 *inuse, u32 *maxuse) +{ + *inuse = (val & GENMASK(25, 13)) >> 13; + *maxuse = val & GENMASK(12, 0); +} + static const struct ocelot_ops vsc9953_ops = { .reset = vsc9953_reset, .wm_enc = vsc9953_wm_enc, + .wm_dec = vsc9953_wm_dec, + .wm_stat = vsc9953_wm_stat, .port_to_netdev = felix_port_to_netdev, .netdev_to_port = felix_netdev_to_port, }; |