diff options
Diffstat (limited to 'drivers/net/ethernet')
| -rw-r--r-- | drivers/net/ethernet/mscc/ocelot.c | 1 | ||||
| -rw-r--r-- | drivers/net/ethernet/mscc/ocelot_vcap.c | 79 | ||||
| -rw-r--r-- | drivers/net/ethernet/mscc/ocelot_vcap.h | 1 | ||||
| -rw-r--r-- | drivers/net/ethernet/mscc/ocelot_vsc7514.c | 13 |
4 files changed, 91 insertions, 3 deletions
diff --git a/drivers/net/ethernet/mscc/ocelot.c b/drivers/net/ethernet/mscc/ocelot.c index b9375d96cdbc..974821b9cdc4 100644 --- a/drivers/net/ethernet/mscc/ocelot.c +++ b/drivers/net/ethernet/mscc/ocelot.c @@ -5,6 +5,7 @@ * Copyright (c) 2017 Microsemi Corporation */ #include <linux/if_bridge.h> +#include <soc/mscc/ocelot_vcap.h> #include "ocelot.h" #include "ocelot_vcap.h" diff --git a/drivers/net/ethernet/mscc/ocelot_vcap.c b/drivers/net/ethernet/mscc/ocelot_vcap.c index 1755979e3f36..b736c3d3df2f 100644 --- a/drivers/net/ethernet/mscc/ocelot_vcap.c +++ b/drivers/net/ethernet/mscc/ocelot_vcap.c @@ -1001,11 +1001,79 @@ static void ocelot_vcap_init_one(struct ocelot *ocelot, VCAP_SEL_ACTION | VCAP_SEL_COUNTER); } +static void ocelot_vcap_detect_constants(struct ocelot *ocelot, + struct vcap_props *vcap) +{ + int counter_memory_width; + int num_default_actions; + int version; + + version = ocelot_target_read(ocelot, vcap->target, + VCAP_CONST_VCAP_VER); + /* Only version 0 VCAP supported for now */ + if (WARN_ON(version != 0)) + return; + + /* Width in bits of type-group field */ + vcap->tg_width = ocelot_target_read(ocelot, vcap->target, + VCAP_CONST_ENTRY_TG_WIDTH); + /* Number of subwords per TCAM row */ + vcap->sw_count = ocelot_target_read(ocelot, vcap->target, + VCAP_CONST_ENTRY_SWCNT); + /* Number of rows in TCAM. There can be this many full keys, or double + * this number half keys, or 4 times this number quarter keys. + */ + vcap->entry_count = ocelot_target_read(ocelot, vcap->target, + VCAP_CONST_ENTRY_CNT); + /* Assuming there are 4 subwords per TCAM row, their layout in the + * actual TCAM (not in the cache) would be: + * + * | SW 3 | TG 3 | SW 2 | TG 2 | SW 1 | TG 1 | SW 0 | TG 0 | + * + * (where SW=subword and TG=Type-Group). + * + * What VCAP_CONST_ENTRY_CNT is giving us is the width of one full TCAM + * row. But when software accesses the TCAM through the cache + * registers, the Type-Group values are written through another set of + * registers VCAP_TG_DAT, and therefore, it appears as though the 4 + * subwords are contiguous in the cache memory. + * Important mention: regardless of the number of key entries per row + * (and therefore of key size: 1 full key or 2 half keys or 4 quarter + * keys), software always has to configure 4 Type-Group values. For + * example, in the case of 1 full key, the driver needs to set all 4 + * Type-Group to be full key. + * + * For this reason, we need to fix up the value that the hardware is + * giving us. We don't actually care about the width of the entry in + * the TCAM. What we care about is the width of the entry in the cache + * registers, which is how we get to interact with it. And since the + * VCAP_ENTRY_DAT cache registers access only the subwords and not the + * Type-Groups, this means we need to subtract the width of the + * Type-Groups when packing and unpacking key entry data in a TCAM row. + */ + vcap->entry_width = ocelot_target_read(ocelot, vcap->target, + VCAP_CONST_ENTRY_WIDTH); + vcap->entry_width -= vcap->tg_width * vcap->sw_count; + num_default_actions = ocelot_target_read(ocelot, vcap->target, + VCAP_CONST_ACTION_DEF_CNT); + vcap->action_count = vcap->entry_count + num_default_actions; + vcap->action_width = ocelot_target_read(ocelot, vcap->target, + VCAP_CONST_ACTION_WIDTH); + /* The width of the counter memory, this is the complete width of all + * counter-fields associated with one full-word entry. There is one + * counter per entry sub-word (see CAP_CORE::ENTRY_SWCNT for number of + * subwords.) + */ + vcap->counter_words = vcap->sw_count; + counter_memory_width = ocelot_target_read(ocelot, vcap->target, + VCAP_CONST_CNT_WIDTH); + vcap->counter_width = counter_memory_width / vcap->counter_words; +} + int ocelot_vcap_init(struct ocelot *ocelot) { struct ocelot_vcap_block *block = &ocelot->block; - - ocelot_vcap_init_one(ocelot, &ocelot->vcap[VCAP_IS2]); + int i; /* Create a policer that will drop the frames for the cpu. * This policer will be used as action in the acl rules to drop @@ -1022,6 +1090,13 @@ int ocelot_vcap_init(struct ocelot *ocelot) ocelot_write_gix(ocelot, 0x3fffff, ANA_POL_CIR_STATE, OCELOT_POLICER_DISCARD); + for (i = 0; i < OCELOT_NUM_VCAP_BLOCKS; i++) { + struct vcap_props *vcap = &ocelot->vcap[i]; + + ocelot_vcap_detect_constants(ocelot, vcap); + ocelot_vcap_init_one(ocelot, vcap); + } + block->pol_lpr = OCELOT_POLICER_DISCARD - 1; INIT_LIST_HEAD(&block->rules); diff --git a/drivers/net/ethernet/mscc/ocelot_vcap.h b/drivers/net/ethernet/mscc/ocelot_vcap.h index 0dfbfc011b2e..50742d13c01a 100644 --- a/drivers/net/ethernet/mscc/ocelot_vcap.h +++ b/drivers/net/ethernet/mscc/ocelot_vcap.h @@ -222,6 +222,7 @@ int ocelot_vcap_filter_del(struct ocelot *ocelot, int ocelot_vcap_filter_stats_update(struct ocelot *ocelot, struct ocelot_vcap_filter *rule); +void ocelot_detect_vcap_constants(struct ocelot *ocelot); int ocelot_vcap_init(struct ocelot *ocelot); int ocelot_setup_tc_cls_flower(struct ocelot_port_private *priv, diff --git a/drivers/net/ethernet/mscc/ocelot_vsc7514.c b/drivers/net/ethernet/mscc/ocelot_vsc7514.c index 86f8b77decf5..36332bc9af3b 100644 --- a/drivers/net/ethernet/mscc/ocelot_vsc7514.c +++ b/drivers/net/ethernet/mscc/ocelot_vsc7514.c @@ -251,6 +251,17 @@ static const u32 ocelot_vcap_regmap[] = { REG(VCAP_CACHE_ACTION_DAT, 0x000208), REG(VCAP_CACHE_CNT_DAT, 0x000308), REG(VCAP_CACHE_TG_DAT, 0x000388), + /* VCAP_CONST */ + REG(VCAP_CONST_VCAP_VER, 0x000398), + REG(VCAP_CONST_ENTRY_WIDTH, 0x00039c), + REG(VCAP_CONST_ENTRY_CNT, 0x0003a0), + REG(VCAP_CONST_ENTRY_SWCNT, 0x0003a4), + REG(VCAP_CONST_ENTRY_TG_WIDTH, 0x0003a8), + REG(VCAP_CONST_ACTION_DEF_CNT, 0x0003ac), + REG(VCAP_CONST_ACTION_WIDTH, 0x0003b0), + REG(VCAP_CONST_CNT_WIDTH, 0x0003b4), + REG(VCAP_CONST_CORE_CNT, 0x0003b8), + REG(VCAP_CONST_IF_CNT, 0x0003bc), }; static const u32 ocelot_ptp_regmap[] = { @@ -963,7 +974,7 @@ static const struct vcap_field vsc7514_vcap_is2_actions[] = { [VCAP_IS2_ACT_HIT_CNT] = { 49, 32}, }; -static const struct vcap_props vsc7514_vcap_props[] = { +static struct vcap_props vsc7514_vcap_props[] = { [VCAP_ES0] = { .action_type_width = 0, .action_table = { |