From d87b1c08f38a2ce40cf559df36c107a2e6c16a8f Mon Sep 17 00:00:00 2001 From: Colin Foster Date: Sun, 13 Feb 2022 11:12:54 -0800 Subject: net: mscc: ocelot: use bulk reads for stats Create and utilize bulk regmap reads instead of single access for gathering stats. The background reading of statistics happens frequently, and over a few contiguous memory regions. High speed PCIe buses and MMIO access will probably see negligible performance increase. Lower speed buses like SPI and I2C could see significant performance increase, since the bus configuration and register access times account for a large percentage of data transfer time. Signed-off-by: Colin Foster Reviewed-by: Vladimir Oltean Tested-by: Vladimir Oltean Signed-off-by: David S. Miller --- include/soc/mscc/ocelot.h | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'include') diff --git a/include/soc/mscc/ocelot.h b/include/soc/mscc/ocelot.h index 6687ba35eaf3..cacb103e4bad 100644 --- a/include/soc/mscc/ocelot.h +++ b/include/soc/mscc/ocelot.h @@ -540,6 +540,13 @@ struct ocelot_stat_layout { char name[ETH_GSTRING_LEN]; }; +struct ocelot_stats_region { + struct list_head node; + u32 offset; + int count; + u32 *buf; +}; + enum ocelot_tag_prefix { OCELOT_TAG_PREFIX_DISABLED = 0, OCELOT_TAG_PREFIX_NONE, @@ -671,6 +678,7 @@ struct ocelot { struct regmap_field *regfields[REGFIELD_MAX]; const u32 *const *map; const struct ocelot_stat_layout *stats_layout; + struct list_head stats_regions; unsigned int num_stats; u32 pool_size[OCELOT_SB_NUM][OCELOT_SB_POOL_NUM]; -- cgit v1.2.3