From 30d30720709b8bcd2c6baca068a4d0438b7dd7e3 Mon Sep 17 00:00:00 2001 From: Liron Himi Date: Wed, 27 Jan 2021 18:09:38 +0200 Subject: [PATCH] net/mvpp2: introduce fixup for FIFO overrun Currently the HW is configured with only one pool which its buffer size may be larger than the rx-fifo-size. In that situation, frame size larger than the fifo-size is gets dropped due to fifo overrun. This is cause because the HW works in cut-through mode which waits to have in the fifo at least the amount of bytes as define in the smallest pool's buffer size. This patch add a dummy pool which its buffer size is very small (smaller than 64B frame). This tricks the HW and any frame size is gets passed from the FIFO to the PP2. Signed-off-by: Liron Himi --- drivers/net/mvpp2/mrvl_ethdev.c | 92 +++++++++++++++++++++++++++------ drivers/net/mvpp2/mrvl_ethdev.h | 2 + drivers/net/mvpp2/mrvl_qos.c | 1 + 3 files changed, 80 insertions(+), 15 deletions(-) diff --git a/drivers/net/mvpp2/mrvl_ethdev.c b/drivers/net/mvpp2/mrvl_ethdev.c index 48f161bffd..fde6533f1f 100644 --- a/drivers/net/mvpp2/mrvl_ethdev.c +++ b/drivers/net/mvpp2/mrvl_ethdev.c @@ -90,6 +90,8 @@ static int used_bpools[PP2_NUM_PKT_PROC] = { static struct pp2_bpool *mrvl_port_to_bpool_lookup[RTE_MAX_ETHPORTS]; static int mrvl_port_bpool_size[PP2_NUM_PKT_PROC][PP2_BPOOL_NUM_POOLS][RTE_MAX_LCORE]; static uint64_t cookie_addr_high = MRVL_COOKIE_ADDR_INVALID; +static int dummy_pool_id[PP2_NUM_PKT_PROC]; +struct pp2_bpool *dummy_pool[PP2_NUM_PKT_PROC] = {0}; struct mrvl_ifnames { const char *names[PP2_NUM_ETH_PPIO * PP2_NUM_PKT_PROC]; @@ -189,6 +191,52 @@ static struct { MRVL_XSTATS_TBL_ENTRY(tx_errors) }; +static inline int +mrvl_reserve_bit(int *bitmap, int max) +{ + int n = sizeof(*bitmap) * 8 - __builtin_clz(*bitmap); + + if (n >= max) + return -1; + + *bitmap |= 1 << n; + + return n; +} + +static int +mrvl_pp2_fixup_init(void) +{ + struct pp2_bpool_params bpool_params; + char name[15]; + int err, i; + + memset(dummy_pool, 0, sizeof(dummy_pool)); + for (i = 0; i < pp2_get_num_inst(); i++) { + dummy_pool_id[i] = mrvl_reserve_bit(&used_bpools[i], + PP2_BPOOL_NUM_POOLS); + if (dummy_pool_id[i] < 0) { + MRVL_LOG(ERR, "Can't find free pool\n"); + return -1; + } + + memset(name, 0, sizeof(name)); + snprintf(name, sizeof(name), "pool-%d:%d", i, dummy_pool_id[i]); + memset(&bpool_params, 0, sizeof(bpool_params)); + bpool_params.match = name; + bpool_params.buff_len = MRVL_PKT_OFFS; + bpool_params.dummy_short_pool = 1; + err = pp2_bpool_init(&bpool_params, &dummy_pool[i]); + if (err != 0 || !dummy_pool[i]) { + MRVL_LOG(ERR, "BPool init failed!\n"); + used_bpools[i] &= ~(1 << dummy_pool_id[i]); + return -1; + } + } + + return 0; +} + /** * Initialize packet processor. * @@ -198,7 +246,8 @@ static struct { static int mrvl_init_pp2(void) { - struct pp2_init_params init_params; + struct pp2_init_params init_params; + int err; memset(&init_params, 0, sizeof(init_params)); init_params.hif_reserved_map = MRVL_MUSDK_HIFS_RESERVED; @@ -207,7 +256,32 @@ mrvl_init_pp2(void) if (mrvl_cfg && mrvl_cfg->pp2_cfg.prs_udfs.num_udfs) memcpy(&init_params.prs_udfs, &mrvl_cfg->pp2_cfg.prs_udfs, sizeof(struct pp2_parse_udfs)); - return pp2_init(&init_params); + err = pp2_init(&init_params); + if (err != 0) { + MRVL_LOG(ERR, "PP2 init failed"); + return -1; + } + + err = mrvl_pp2_fixup_init(); + if (err != 0) { + MRVL_LOG(ERR, "PP2 fixup init failed"); + return -1; + } + + return 0; +} + +static void +mrvl_pp2_fixup_deinit(void) +{ + int i; + + for (i = 0; i < PP2_NUM_PKT_PROC; i++) { + if (!dummy_pool[i]) + continue; + pp2_bpool_deinit(dummy_pool[i]); + used_bpools[i] &= ~(1 << dummy_pool_id[i]); + } } /** @@ -219,6 +293,7 @@ mrvl_init_pp2(void) static void mrvl_deinit_pp2(void) { + mrvl_pp2_fixup_deinit(); pp2_deinit(); } @@ -275,19 +350,6 @@ mrvl_get_bpool_size(int pp2_id, int pool_id) return size; } -static inline int -mrvl_reserve_bit(int *bitmap, int max) -{ - int n = sizeof(*bitmap) * 8 - __builtin_clz(*bitmap); - - if (n >= max) - return -1; - - *bitmap |= 1 << n; - - return n; -} - static int mrvl_init_hif(int core_id) { diff --git a/drivers/net/mvpp2/mrvl_ethdev.h b/drivers/net/mvpp2/mrvl_ethdev.h index 27d34ecfe0..b0cdddd15e 100644 --- a/drivers/net/mvpp2/mrvl_ethdev.h +++ b/drivers/net/mvpp2/mrvl_ethdev.h @@ -196,6 +196,8 @@ extern int mrvl_logtype; rte_log(RTE_LOG_ ## level, mrvl_logtype, "%s(): " fmt "\n", \ __func__, ##args) +extern struct pp2_bpool *dummy_pool[PP2_NUM_PKT_PROC]; + /** * Convert string to uint32_t with extra checks for result correctness. * diff --git a/drivers/net/mvpp2/mrvl_qos.c b/drivers/net/mvpp2/mrvl_qos.c index 310fd73840..a3add540b8 100644 --- a/drivers/net/mvpp2/mrvl_qos.c +++ b/drivers/net/mvpp2/mrvl_qos.c @@ -881,6 +881,7 @@ setup_tc(struct pp2_ppio_tc_params *param, uint8_t inqs, param->pkt_offset = MRVL_PKT_OFFS; param->pools[0][0] = bpool; + param->pools[0][1] = dummy_pool[bpool->pp2_id]; param->default_color = color; inq_params = rte_zmalloc_socket("inq_params", -- 2.20.1