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net: mscc: ocelot: add ops for decoding watermark threshold and occupancy

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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>
This commit is contained in:
Vladimir Oltean
2021-01-15 04:11:12 +02:00
committed by Jakub Kicinski
parent f6fe01d6fa
commit 703b762190
5 changed files with 54 additions and 6 deletions
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2
include/soc/mscc/ocelot.h
View File

@@ -563,6 +563,8 @@ struct ocelot_ops {
int (*netdev_to_port)(struct net_device *dev);
int (*reset)(struct ocelot *ocelot);
u16 (*wm_enc)(u16 value);
u16 (*wm_dec)(u16 value);
void (*wm_stat)(u32 val, u32 *inuse, u32 *maxuse);
};
struct ocelot_vcap_block {

6
include/soc/mscc/ocelot_qsys.h
View File

@@ -71,12 +71,6 @@
#define QSYS_RES_STAT_GSZ 0x8
#define QSYS_RES_STAT_INUSE(x) (((x) << 12) & GENMASK(23, 12))
#define QSYS_RES_STAT_INUSE_M GENMASK(23, 12)
#define QSYS_RES_STAT_INUSE_X(x) (((x) & GENMASK(23, 12)) >> 12)
#define QSYS_RES_STAT_MAXUSE(x) ((x) & GENMASK(11, 0))
#define QSYS_RES_STAT_MAXUSE_M GENMASK(11, 0)
#define QSYS_MMGT_EQ_CTRL_FP_FREE_CNT(x) ((x) & GENMASK(15, 0))
#define QSYS_MMGT_EQ_CTRL_FP_FREE_CNT_M GENMASK(15, 0)