diff options
Diffstat (limited to 'drivers/net/ethernet/microchip/sparx5/sparx5_psfp.c')
| -rw-r--r-- | drivers/net/ethernet/microchip/sparx5/sparx5_psfp.c | 332 |
1 files changed, 332 insertions, 0 deletions
diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_psfp.c b/drivers/net/ethernet/microchip/sparx5/sparx5_psfp.c new file mode 100644 index 000000000000..8dee1ab1fa75 --- /dev/null +++ b/drivers/net/ethernet/microchip/sparx5/sparx5_psfp.c @@ -0,0 +1,332 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* Microchip Sparx5 Switch driver + * + * Copyright (c) 2023 Microchip Technology Inc. and its subsidiaries. + */ + +#include "sparx5_main_regs.h" +#include "sparx5_main.h" + +#define SPX5_PSFP_SF_CNT 1024 +#define SPX5_PSFP_SG_CONFIG_CHANGE_SLEEP 1000 +#define SPX5_PSFP_SG_CONFIG_CHANGE_TIMEO 100000 + +/* Pool of available service policers */ +static struct sparx5_pool_entry sparx5_psfp_fm_pool[SPX5_SDLB_CNT]; + +/* Pool of available stream gates */ +static struct sparx5_pool_entry sparx5_psfp_sg_pool[SPX5_PSFP_SG_CNT]; + +/* Pool of available stream filters */ +static struct sparx5_pool_entry sparx5_psfp_sf_pool[SPX5_PSFP_SF_CNT]; + +static int sparx5_psfp_sf_get(u32 *id) +{ + return sparx5_pool_get(sparx5_psfp_sf_pool, SPX5_PSFP_SF_CNT, id); +} + +static int sparx5_psfp_sf_put(u32 id) +{ + return sparx5_pool_put(sparx5_psfp_sf_pool, SPX5_PSFP_SF_CNT, id); +} + +static int sparx5_psfp_sg_get(u32 idx, u32 *id) +{ + return sparx5_pool_get_with_idx(sparx5_psfp_sg_pool, SPX5_PSFP_SG_CNT, + idx, id); +} + +static int sparx5_psfp_sg_put(u32 id) +{ + return sparx5_pool_put(sparx5_psfp_sg_pool, SPX5_PSFP_SG_CNT, id); +} + +static int sparx5_psfp_fm_get(u32 idx, u32 *id) +{ + return sparx5_pool_get_with_idx(sparx5_psfp_fm_pool, SPX5_SDLB_CNT, idx, + id); +} + +static int sparx5_psfp_fm_put(u32 id) +{ + return sparx5_pool_put(sparx5_psfp_fm_pool, SPX5_SDLB_CNT, id); +} + +u32 sparx5_psfp_isdx_get_sf(struct sparx5 *sparx5, u32 isdx) +{ + return ANA_L2_TSN_CFG_TSN_SFID_GET(spx5_rd(sparx5, + ANA_L2_TSN_CFG(isdx))); +} + +u32 sparx5_psfp_isdx_get_fm(struct sparx5 *sparx5, u32 isdx) +{ + return ANA_L2_DLB_CFG_DLB_IDX_GET(spx5_rd(sparx5, + ANA_L2_DLB_CFG(isdx))); +} + +u32 sparx5_psfp_sf_get_sg(struct sparx5 *sparx5, u32 sfid) +{ + return ANA_AC_TSN_SF_CFG_TSN_SGID_GET(spx5_rd(sparx5, + ANA_AC_TSN_SF_CFG(sfid))); +} + +void sparx5_isdx_conf_set(struct sparx5 *sparx5, u32 isdx, u32 sfid, u32 fmid) +{ + spx5_rmw(ANA_L2_TSN_CFG_TSN_SFID_SET(sfid), ANA_L2_TSN_CFG_TSN_SFID, + sparx5, ANA_L2_TSN_CFG(isdx)); + + spx5_rmw(ANA_L2_DLB_CFG_DLB_IDX_SET(fmid), ANA_L2_DLB_CFG_DLB_IDX, + sparx5, ANA_L2_DLB_CFG(isdx)); +} + +/* Internal priority value to internal priority selector */ +static u32 sparx5_psfp_ipv_to_ips(s32 ipv) +{ + return ipv > 0 ? (ipv | BIT(3)) : 0; +} + +static int sparx5_psfp_sgid_get_status(struct sparx5 *sparx5) +{ + return spx5_rd(sparx5, ANA_AC_SG_ACCESS_CTRL); +} + +static int sparx5_psfp_sgid_wait_for_completion(struct sparx5 *sparx5) +{ + u32 val; + + return readx_poll_timeout(sparx5_psfp_sgid_get_status, sparx5, val, + !ANA_AC_SG_ACCESS_CTRL_CONFIG_CHANGE_GET(val), + SPX5_PSFP_SG_CONFIG_CHANGE_SLEEP, + SPX5_PSFP_SG_CONFIG_CHANGE_TIMEO); +} + +static void sparx5_psfp_sg_config_change(struct sparx5 *sparx5, u32 id) +{ + spx5_wr(ANA_AC_SG_ACCESS_CTRL_SGID_SET(id), sparx5, + ANA_AC_SG_ACCESS_CTRL); + + spx5_wr(ANA_AC_SG_ACCESS_CTRL_CONFIG_CHANGE_SET(1) | + ANA_AC_SG_ACCESS_CTRL_SGID_SET(id), + sparx5, ANA_AC_SG_ACCESS_CTRL); + + if (sparx5_psfp_sgid_wait_for_completion(sparx5) < 0) + pr_debug("%s:%d timed out waiting for sgid completion", + __func__, __LINE__); +} + +static void sparx5_psfp_sf_set(struct sparx5 *sparx5, u32 id, + const struct sparx5_psfp_sf *sf) +{ + /* Configure stream gate*/ + spx5_rmw(ANA_AC_TSN_SF_CFG_TSN_SGID_SET(sf->sgid) | + ANA_AC_TSN_SF_CFG_TSN_MAX_SDU_SET(sf->max_sdu) | + ANA_AC_TSN_SF_CFG_BLOCK_OVERSIZE_STATE_SET(sf->sblock_osize) | + ANA_AC_TSN_SF_CFG_BLOCK_OVERSIZE_ENA_SET(sf->sblock_osize_ena), + ANA_AC_TSN_SF_CFG_TSN_SGID | ANA_AC_TSN_SF_CFG_TSN_MAX_SDU | + ANA_AC_TSN_SF_CFG_BLOCK_OVERSIZE_STATE | + ANA_AC_TSN_SF_CFG_BLOCK_OVERSIZE_ENA, + sparx5, ANA_AC_TSN_SF_CFG(id)); +} + +static int sparx5_psfp_sg_set(struct sparx5 *sparx5, u32 id, + const struct sparx5_psfp_sg *sg) +{ + u32 ips, base_lsb, base_msb, accum_time_interval = 0; + const struct sparx5_psfp_gce *gce; + int i; + + ips = sparx5_psfp_ipv_to_ips(sg->ipv); + base_lsb = sg->basetime.tv_sec & 0xffffffff; + base_msb = sg->basetime.tv_sec >> 32; + + /* Set stream gate id */ + spx5_wr(ANA_AC_SG_ACCESS_CTRL_SGID_SET(id), sparx5, + ANA_AC_SG_ACCESS_CTRL); + + /* Write AdminPSFP values */ + spx5_wr(sg->basetime.tv_nsec, sparx5, ANA_AC_SG_CONFIG_REG_1); + spx5_wr(base_lsb, sparx5, ANA_AC_SG_CONFIG_REG_2); + + spx5_rmw(ANA_AC_SG_CONFIG_REG_3_BASE_TIME_SEC_MSB_SET(base_msb) | + ANA_AC_SG_CONFIG_REG_3_INIT_IPS_SET(ips) | + ANA_AC_SG_CONFIG_REG_3_LIST_LENGTH_SET(sg->num_entries) | + ANA_AC_SG_CONFIG_REG_3_INIT_GATE_STATE_SET(sg->gate_state) | + ANA_AC_SG_CONFIG_REG_3_GATE_ENABLE_SET(1), + ANA_AC_SG_CONFIG_REG_3_BASE_TIME_SEC_MSB | + ANA_AC_SG_CONFIG_REG_3_INIT_IPS | + ANA_AC_SG_CONFIG_REG_3_LIST_LENGTH | + ANA_AC_SG_CONFIG_REG_3_INIT_GATE_STATE | + ANA_AC_SG_CONFIG_REG_3_GATE_ENABLE, + sparx5, ANA_AC_SG_CONFIG_REG_3); + + spx5_wr(sg->cycletime, sparx5, ANA_AC_SG_CONFIG_REG_4); + spx5_wr(sg->cycletimeext, sparx5, ANA_AC_SG_CONFIG_REG_5); + + /* For each scheduling entry */ + for (i = 0; i < sg->num_entries; i++) { + gce = &sg->gce[i]; + ips = sparx5_psfp_ipv_to_ips(gce->ipv); + /* hardware needs TimeInterval to be cumulative */ + accum_time_interval += gce->interval; + /* Set gate state */ + spx5_wr(ANA_AC_SG_GCL_GS_CONFIG_IPS_SET(ips) | + ANA_AC_SG_GCL_GS_CONFIG_GATE_STATE_SET(gce->gate_state), + sparx5, ANA_AC_SG_GCL_GS_CONFIG(i)); + + /* Set time interval */ + spx5_wr(accum_time_interval, sparx5, + ANA_AC_SG_GCL_TI_CONFIG(i)); + + /* Set maximum octets */ + spx5_wr(gce->maxoctets, sparx5, ANA_AC_SG_GCL_OCT_CONFIG(i)); + } + + return 0; +} + +static int sparx5_sdlb_conf_set(struct sparx5 *sparx5, + struct sparx5_psfp_fm *fm) +{ + int (*sparx5_sdlb_group_action)(struct sparx5 *sparx5, u32 group, + u32 idx); + + if (!fm->pol.rate && !fm->pol.burst) + sparx5_sdlb_group_action = &sparx5_sdlb_group_del; + else + sparx5_sdlb_group_action = &sparx5_sdlb_group_add; + + sparx5_policer_conf_set(sparx5, &fm->pol); + + return sparx5_sdlb_group_action(sparx5, fm->pol.group, fm->pol.idx); +} + +int sparx5_psfp_sf_add(struct sparx5 *sparx5, const struct sparx5_psfp_sf *sf, + u32 *id) +{ + int ret; + + ret = sparx5_psfp_sf_get(id); + if (ret < 0) + return ret; + + sparx5_psfp_sf_set(sparx5, *id, sf); + + return 0; +} + +int sparx5_psfp_sf_del(struct sparx5 *sparx5, u32 id) +{ + const struct sparx5_psfp_sf sf = { 0 }; + + sparx5_psfp_sf_set(sparx5, id, &sf); + + return sparx5_psfp_sf_put(id); +} + +int sparx5_psfp_sg_add(struct sparx5 *sparx5, u32 uidx, + struct sparx5_psfp_sg *sg, u32 *id) +{ + ktime_t basetime; + int ret; + + ret = sparx5_psfp_sg_get(uidx, id); + if (ret < 0) + return ret; + /* Was already in use, no need to reconfigure */ + if (ret > 1) + return 0; + + /* Calculate basetime for this stream gate */ + sparx5_new_base_time(sparx5, sg->cycletime, 0, &basetime); + sg->basetime = ktime_to_timespec64(basetime); + + sparx5_psfp_sg_set(sparx5, *id, sg); + + /* Signal hardware to copy AdminPSFP values into OperPSFP values */ + sparx5_psfp_sg_config_change(sparx5, *id); + + return 0; +} + +int sparx5_psfp_sg_del(struct sparx5 *sparx5, u32 id) +{ + const struct sparx5_psfp_sg sg = { 0 }; + int ret; + + ret = sparx5_psfp_sg_put(id); + if (ret < 0) + return ret; + /* Stream gate still in use ? */ + if (ret > 0) + return 0; + + return sparx5_psfp_sg_set(sparx5, id, &sg); +} + +int sparx5_psfp_fm_add(struct sparx5 *sparx5, u32 uidx, + struct sparx5_psfp_fm *fm, u32 *id) +{ + struct sparx5_policer *pol = &fm->pol; + int ret; + + /* Get flow meter */ + ret = sparx5_psfp_fm_get(uidx, &fm->pol.idx); + if (ret < 0) + return ret; + /* Was already in use, no need to reconfigure */ + if (ret > 1) + return 0; + + ret = sparx5_sdlb_group_get_by_rate(sparx5, pol->rate, pol->burst); + if (ret < 0) + return ret; + + fm->pol.group = ret; + + ret = sparx5_sdlb_conf_set(sparx5, fm); + if (ret < 0) + return ret; + + *id = fm->pol.idx; + + return 0; +} + +int sparx5_psfp_fm_del(struct sparx5 *sparx5, u32 id) +{ + struct sparx5_psfp_fm fm = { .pol.idx = id, + .pol.type = SPX5_POL_SERVICE }; + int ret; + + /* Find the group that this lb belongs to */ + ret = sparx5_sdlb_group_get_by_index(sparx5, id, &fm.pol.group); + if (ret < 0) + return ret; + + ret = sparx5_psfp_fm_put(id); + if (ret < 0) + return ret; + /* Do not reset flow-meter if still in use. */ + if (ret > 0) + return 0; + + return sparx5_sdlb_conf_set(sparx5, &fm); +} + +void sparx5_psfp_init(struct sparx5 *sparx5) +{ + const struct sparx5_sdlb_group *group; + int i; + + for (i = 0; i < SPX5_SDLB_GROUP_CNT; i++) { + group = &sdlb_groups[i]; + sparx5_sdlb_group_init(sparx5, group->max_rate, + group->min_burst, group->frame_size, i); + } + + spx5_wr(ANA_AC_SG_CYCLETIME_UPDATE_PERIOD_SG_CT_UPDATE_ENA_SET(1), + sparx5, ANA_AC_SG_CYCLETIME_UPDATE_PERIOD); + + spx5_rmw(ANA_L2_FWD_CFG_ISDX_LOOKUP_ENA_SET(1), + ANA_L2_FWD_CFG_ISDX_LOOKUP_ENA, sparx5, ANA_L2_FWD_CFG); +} |