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[144.49.247.101]) by smtp-relay.gmail.com with ESMTPS id 8926c6da1cb9f-5b7aaf509c4sm63177173.8.2025.11.11.12.59.26 for (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 11 Nov 2025 12:59:26 -0800 (PST) X-Relaying-Domain: broadcom.com X-CFilter-Loop: Reflected Received: by mail-pg1-f200.google.com with SMTP id 41be03b00d2f7-b55735710f0so234900a12.2 for ; Tue, 11 Nov 2025 12:59:25 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; t=1762894765; x=1763499565; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=TBEatJrYViFT545+/aoVpFeK11myHI7JC0xCcrfj9YI=; b=MoTx3tVcpx8Pih8a3fjqxn0GFTPSAmPFT3C/rAwmeHrldl+b30L9fuA7asEqlSn5SL IC8dPC5xlt+KM4sWMN/GW/IajY+epJmoC6d/eiIaVuiBt3eyReD27bqeY2X9FkDEPT7e NCECDl5FCgX3tIFb8RJksqR/s5OKsChpfjAyk= X-Forwarded-Encrypted: i=1; AJvYcCUrVGYxPPRoMT165CODq2sWoi8BtUKdZEcDwm1hSt44fM9R2EJlk7zdvZ8rZDAv7SgljLCuAorhwXWWxA0=@vger.kernel.org X-Received: by 2002:a05:6a20:12c4:b0:347:9ae1:cffb with SMTP id adf61e73a8af0-35909c711a9mr603862637.24.1762894764901; Tue, 11 Nov 2025 12:59:24 -0800 (PST) X-Received: by 2002:a05:6a20:12c4:b0:347:9ae1:cffb with SMTP id adf61e73a8af0-35909c711a9mr603834637.24.1762894764469; Tue, 11 Nov 2025 12:59:24 -0800 (PST) Received: from localhost.localdomain ([192.19.203.250]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-bbf18b53574sm497131a12.38.2025.11.11.12.59.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 11 Nov 2025 12:59:24 -0800 (PST) From: Bhargava Marreddy To: davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, andrew+netdev@lunn.ch, horms@kernel.org Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, michael.chan@broadcom.com, pavan.chebbi@broadcom.com, vsrama-krishna.nemani@broadcom.com, vikas.gupta@broadcom.com, Bhargava Marreddy , Rajashekar Hudumula Subject: [net-next 06/12] bng_en: Add support to handle AGG events Date: Wed, 12 Nov 2025 02:27:56 +0530 Message-ID: <20251111205829.97579-7-bhargava.marreddy@broadcom.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20251111205829.97579-1-bhargava.marreddy@broadcom.com> References: <20251111205829.97579-1-bhargava.marreddy@broadcom.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-DetectorID-Processed: b00c1d49-9d2e-4205-b15f-d015386d3d5e Add AGG event handling in the RX path to receive packet data on AGG rings. This enables Jumbo and HDS functionality. Signed-off-by: Bhargava Marreddy Reviewed-by: Vikas Gupta Reviewed-by: Rajashekar Hudumula --- .../net/ethernet/broadcom/bnge/bnge_hw_def.h | 13 ++ .../net/ethernet/broadcom/bnge/bnge_netdev.c | 17 +- .../net/ethernet/broadcom/bnge/bnge_netdev.h | 8 + .../net/ethernet/broadcom/bnge/bnge_txrx.c | 216 +++++++++++++++++- .../net/ethernet/broadcom/bnge/bnge_txrx.h | 1 + 5 files changed, 247 insertions(+), 8 deletions(-) diff --git a/drivers/net/ethernet/broadcom/bnge/bnge_hw_def.h b/drivers/net/ethernet/broadcom/bnge/bnge_hw_def.h index d0b3d4bea93..a41f4b00003 100644 --- a/drivers/net/ethernet/broadcom/bnge/bnge_hw_def.h +++ b/drivers/net/ethernet/broadcom/bnge/bnge_hw_def.h @@ -4,6 +4,19 @@ #ifndef _BNGE_HW_DEF_H_ #define _BNGE_HW_DEF_H_ +struct rx_agg_cmp { + __le32 rx_agg_cmp_len_flags_type; + #define RX_AGG_CMP_TYPE (0x3f << 0) + #define RX_AGG_CMP_LEN (0xffff << 16) + #define RX_AGG_CMP_LEN_SHIFT 16 + u32 rx_agg_cmp_opaque; + __le32 rx_agg_cmp_v; + #define RX_AGG_CMP_V (1 << 0) + #define RX_AGG_CMP_AGG_ID (0xffff << 16) + #define RX_AGG_CMP_AGG_ID_SHIFT 16 + __le32 rx_agg_cmp_unused; +}; + struct tx_bd_ext { __le32 tx_bd_hsize_lflags; #define TX_BD_FLAGS_TCP_UDP_CHKSUM (1 << 0) diff --git a/drivers/net/ethernet/broadcom/bnge/bnge_netdev.c b/drivers/net/ethernet/broadcom/bnge/bnge_netdev.c index fa85ff2234e..87b5b2163e5 100644 --- a/drivers/net/ethernet/broadcom/bnge/bnge_netdev.c +++ b/drivers/net/ethernet/broadcom/bnge/bnge_netdev.c @@ -10,6 +10,9 @@ #include #include #include +#include +#include +#include #include #include #include @@ -980,9 +983,9 @@ static netmem_ref __bnge_alloc_rx_netmem(struct bnge_net *bn, return netmem; } -static u8 *__bnge_alloc_rx_frag(struct bnge_net *bn, dma_addr_t *mapping, - struct bnge_rx_ring_info *rxr, - gfp_t gfp) +u8 *__bnge_alloc_rx_frag(struct bnge_net *bn, dma_addr_t *mapping, + struct bnge_rx_ring_info *rxr, + gfp_t gfp) { unsigned int offset; struct page *page; @@ -1049,7 +1052,7 @@ static int bnge_alloc_one_rx_ring_bufs(struct bnge_net *bn, return 0; } -static u16 bnge_find_next_agg_idx(struct bnge_rx_ring_info *rxr, u16 idx) +u16 bnge_find_next_agg_idx(struct bnge_rx_ring_info *rxr, u16 idx) { u16 next, max = rxr->rx_agg_bmap_size; @@ -1059,9 +1062,9 @@ static u16 bnge_find_next_agg_idx(struct bnge_rx_ring_info *rxr, u16 idx) return next; } -static int bnge_alloc_rx_netmem(struct bnge_net *bn, - struct bnge_rx_ring_info *rxr, - u16 prod, gfp_t gfp) +int bnge_alloc_rx_netmem(struct bnge_net *bn, + struct bnge_rx_ring_info *rxr, + u16 prod, gfp_t gfp) { struct bnge_sw_rx_agg_bd *rx_agg_buf; u16 sw_prod = rxr->rx_sw_agg_prod; diff --git a/drivers/net/ethernet/broadcom/bnge/bnge_netdev.h b/drivers/net/ethernet/broadcom/bnge/bnge_netdev.h index 43fda076969..781cba50bdc 100644 --- a/drivers/net/ethernet/broadcom/bnge/bnge_netdev.h +++ b/drivers/net/ethernet/broadcom/bnge/bnge_netdev.h @@ -518,4 +518,12 @@ u16 bnge_cp_ring_for_tx(struct bnge_tx_ring_info *txr); void bnge_fill_hw_rss_tbl(struct bnge_net *bn, struct bnge_vnic_info *vnic); int bnge_alloc_rx_data(struct bnge_net *bn, struct bnge_rx_ring_info *rxr, u16 prod, gfp_t gfp); +inline int bnge_alloc_rx_page(struct bnge_net *bn, + struct bnge_rx_ring_info *rxr, + u16 prod, gfp_t gfp); +inline u16 bnge_find_next_agg_idx(struct bnge_rx_ring_info *rxr, u16 idx); +inline u8 *__bnge_alloc_rx_frag(struct bnge_net *bn, dma_addr_t *mapping, + struct bnge_rx_ring_info *rxr, gfp_t gfp); +int bnge_alloc_rx_netmem(struct bnge_net *bn, struct bnge_rx_ring_info *rxr, + u16 prod, gfp_t gfp); #endif /* _BNGE_NETDEV_H_ */ diff --git a/drivers/net/ethernet/broadcom/bnge/bnge_txrx.c b/drivers/net/ethernet/broadcom/bnge/bnge_txrx.c index f02ac71447f..ccfccb8fcf1 100644 --- a/drivers/net/ethernet/broadcom/bnge/bnge_txrx.c +++ b/drivers/net/ethernet/broadcom/bnge/bnge_txrx.c @@ -13,6 +13,7 @@ #include #include #include +#include #include #include #include @@ -39,6 +40,186 @@ irqreturn_t bnge_msix(int irq, void *dev_instance) return IRQ_HANDLED; } +static struct rx_agg_cmp *bnge_get_agg(struct bnge_net *bn, + struct bnge_cp_ring_info *cpr, + u16 cp_cons, u16 curr) +{ + struct rx_agg_cmp *agg; + + cp_cons = RING_CMP(bn, ADV_RAW_CMP(cp_cons, curr)); + agg = (struct rx_agg_cmp *) + &cpr->desc_ring[CP_RING(cp_cons)][CP_IDX(cp_cons)]; + return agg; +} + +static void bnge_reuse_rx_agg_bufs(struct bnge_cp_ring_info *cpr, u16 idx, + u16 start, u32 agg_bufs) +{ + struct bnge_napi *bnapi = cpr->bnapi; + struct bnge_rx_ring_info *rxr = bnapi->rx_ring; + u16 sw_prod = rxr->rx_sw_agg_prod; + struct bnge_net *bn = bnapi->bn; + u16 prod = rxr->rx_agg_prod; + u32 i; + + for (i = 0; i < agg_bufs; i++) { + struct bnge_sw_rx_agg_bd *cons_rx_buf, *prod_rx_buf; + struct rx_agg_cmp *agg; + struct rx_bd *prod_bd; + netmem_ref netmem; + u16 cons; + + agg = bnge_get_agg(bn, cpr, idx, start + i); + cons = agg->rx_agg_cmp_opaque; + __clear_bit(cons, rxr->rx_agg_bmap); + + if (unlikely(test_bit(sw_prod, rxr->rx_agg_bmap))) + sw_prod = bnge_find_next_agg_idx(rxr, sw_prod); + + __set_bit(sw_prod, rxr->rx_agg_bmap); + prod_rx_buf = &rxr->rx_agg_buf_ring[sw_prod]; + cons_rx_buf = &rxr->rx_agg_buf_ring[cons]; + + /* It is possible for sw_prod to be equal to cons, so + * set cons_rx_buf->netmem to 0 first. + */ + netmem = cons_rx_buf->netmem; + cons_rx_buf->netmem = 0; + prod_rx_buf->netmem = netmem; + + prod_rx_buf->mapping = cons_rx_buf->mapping; + + prod_bd = &rxr->rx_agg_desc_ring[RX_AGG_RING(bn, prod)] + [RX_IDX(prod)]; + + prod_bd->rx_bd_haddr = cpu_to_le64(cons_rx_buf->mapping); + prod_bd->rx_bd_opaque = sw_prod; + + prod = NEXT_RX_AGG(prod); + sw_prod = RING_RX_AGG(bn, NEXT_RX_AGG(sw_prod)); + } + rxr->rx_agg_prod = prod; + rxr->rx_sw_agg_prod = sw_prod; +} + +static int bnge_agg_bufs_valid(struct bnge_net *bn, + struct bnge_cp_ring_info *cpr, + u8 agg_bufs, u32 *raw_cons) +{ + struct rx_agg_cmp *agg; + u16 last; + + *raw_cons = ADV_RAW_CMP(*raw_cons, agg_bufs); + last = RING_CMP(bn, *raw_cons); + agg = (struct rx_agg_cmp *) + &cpr->desc_ring[CP_RING(last)][CP_IDX(last)]; + return RX_AGG_CMP_VALID(agg, *raw_cons); +} + +static int bnge_discard_rx(struct bnge_net *bn, struct bnge_cp_ring_info *cpr, + u32 *raw_cons, void *cmp) +{ + u32 tmp_raw_cons = *raw_cons; + struct rx_cmp *rxcmp = cmp; + u8 cmp_type, agg_bufs = 0; + + cmp_type = RX_CMP_TYPE(rxcmp); + + if (cmp_type == CMP_TYPE_RX_L2_CMP) { + agg_bufs = (le32_to_cpu(rxcmp->rx_cmp_misc_v1) & + RX_CMP_AGG_BUFS) >> + RX_CMP_AGG_BUFS_SHIFT; + } + + if (agg_bufs) { + if (!bnge_agg_bufs_valid(bn, cpr, agg_bufs, &tmp_raw_cons)) + return -EBUSY; + } + *raw_cons = tmp_raw_cons; + return 0; +} + +static u32 __bnge_rx_agg_netmems(struct bnge_net *bn, + struct bnge_cp_ring_info *cpr, + u16 idx, u32 agg_bufs, + struct sk_buff *skb) +{ + struct bnge_napi *bnapi = cpr->bnapi; + struct skb_shared_info *shinfo; + struct bnge_rx_ring_info *rxr; + u32 i, total_frag_len = 0; + u16 prod; + + rxr = bnapi->rx_ring; + prod = rxr->rx_agg_prod; + shinfo = skb_shinfo(skb); + + for (i = 0; i < agg_bufs; i++) { + struct bnge_sw_rx_agg_bd *cons_rx_buf; + struct rx_agg_cmp *agg; + u16 cons, frag_len; + netmem_ref netmem; + + agg = bnge_get_agg(bn, cpr, idx, i); + cons = agg->rx_agg_cmp_opaque; + frag_len = (le32_to_cpu(agg->rx_agg_cmp_len_flags_type) & + RX_AGG_CMP_LEN) >> RX_AGG_CMP_LEN_SHIFT; + + cons_rx_buf = &rxr->rx_agg_buf_ring[cons]; + skb_add_rx_frag_netmem(skb, i, cons_rx_buf->netmem, 0, + frag_len, BNGE_RX_PAGE_SIZE); + __clear_bit(cons, rxr->rx_agg_bmap); + + /* It is possible for bnge_alloc_rx_netmem() to allocate + * a sw_prod index that equals the cons index, so we + * need to clear the cons entry now. + */ + netmem = cons_rx_buf->netmem; + cons_rx_buf->netmem = 0; + + if (bnge_alloc_rx_netmem(bn, rxr, prod, GFP_ATOMIC) != 0) { + skb->len -= frag_len; + skb->data_len -= frag_len; + skb->truesize -= BNGE_RX_PAGE_SIZE; + + --shinfo->nr_frags; + cons_rx_buf->netmem = netmem; + + /* Update prod since possibly some netmems have been + * allocated already. + */ + rxr->rx_agg_prod = prod; + bnge_reuse_rx_agg_bufs(cpr, idx, i, agg_bufs - i); + return 0; + } + + page_pool_dma_sync_netmem_for_cpu(rxr->page_pool, netmem, 0, + BNGE_RX_PAGE_SIZE); + + total_frag_len += frag_len; + prod = NEXT_RX_AGG(prod); + } + rxr->rx_agg_prod = prod; + return total_frag_len; +} + +static struct sk_buff *bnge_rx_agg_netmems_skb(struct bnge_net *bn, + struct bnge_cp_ring_info *cpr, + struct sk_buff *skb, u16 idx, + u32 agg_bufs) +{ + u32 total_frag_len = 0; + + total_frag_len = __bnge_rx_agg_netmems(bn, cpr, idx, agg_bufs, skb); + if (!total_frag_len) { + skb_mark_for_recycle(skb); + dev_kfree_skb(skb); + return NULL; + } + + return skb; +} + static void bnge_sched_reset_rxr(struct bnge_net *bn, struct bnge_rx_ring_info *rxr) { @@ -210,6 +391,7 @@ static int bnge_rx_pkt(struct bnge_net *bn, struct bnge_cp_ring_info *cpr, dma_addr_t dma_addr; struct sk_buff *skb; unsigned int len; + u8 agg_bufs; void *data; int rc = 0; @@ -239,11 +421,15 @@ static int bnge_rx_pkt(struct bnge_net *bn, struct bnge_cp_ring_info *cpr, cons = rxcmp->rx_cmp_opaque; if (unlikely(cons != rxr->rx_next_cons)) { + int rc1 = bnge_discard_rx(bn, cpr, &tmp_raw_cons, rxcmp); + /* 0xffff is forced error, don't print it */ if (rxr->rx_next_cons != 0xffff) netdev_warn(bn->netdev, "RX cons %x != expected cons %x\n", cons, rxr->rx_next_cons); bnge_sched_reset_rxr(bn, rxr); + if (rc1) + return rc1; goto next_rx_no_prod_no_len; } rx_buf = &rxr->rx_buf_ring[cons]; @@ -252,11 +438,22 @@ static int bnge_rx_pkt(struct bnge_net *bn, struct bnge_cp_ring_info *cpr, prefetch(data_ptr); misc = le32_to_cpu(rxcmp->rx_cmp_misc_v1); + agg_bufs = (misc & RX_CMP_AGG_BUFS) >> RX_CMP_AGG_BUFS_SHIFT; + + if (agg_bufs) { + if (!bnge_agg_bufs_valid(bn, cpr, agg_bufs, &tmp_raw_cons)) + return -EBUSY; + + cp_cons = NEXT_CMP(bn, cp_cons); + *event |= BNGE_AGG_EVENT; + } *event |= BNGE_RX_EVENT; rx_buf->data = NULL; if (rxcmp1->rx_cmp_cfa_code_errors_v2 & RX_CMP_L2_ERRORS) { bnge_reuse_rx_data(rxr, cons, data); + if (agg_bufs) + bnge_reuse_rx_agg_bufs(cpr, cp_cons, 0, agg_bufs); rc = -EIO; goto next_rx_no_len; } @@ -268,8 +465,12 @@ static int bnge_rx_pkt(struct bnge_net *bn, struct bnge_cp_ring_info *cpr, if (len <= bn->rx_copybreak) { skb = bnge_copy_skb(bnapi, data_ptr, len, dma_addr); bnge_reuse_rx_data(rxr, cons, data); - if (!skb) + if (!skb) { + if (agg_bufs) + bnge_reuse_rx_agg_bufs(cpr, cp_cons, 0, + agg_bufs); goto oom_next_rx; + } } else { u32 payload; @@ -283,6 +484,13 @@ static int bnge_rx_pkt(struct bnge_net *bn, struct bnge_cp_ring_info *cpr, goto oom_next_rx; } + if (agg_bufs) { + skb = bnge_rx_agg_netmems_skb(bn, cpr, skb, cp_cons, + agg_bufs); + if (!skb) + goto oom_next_rx; + } + if (RX_CMP_HASH_VALID(rxcmp)) { enum pkt_hash_types type; @@ -463,6 +671,12 @@ static void __bnge_poll_work_done(struct bnge_net *bn, struct bnge_napi *bnapi, bnge_db_write(bn->bd, &rxr->rx_db, rxr->rx_prod); bnapi->events &= ~BNGE_RX_EVENT; } + if (bnapi->events & BNGE_AGG_EVENT) { + struct bnge_rx_ring_info *rxr = bnapi->rx_ring; + + bnge_db_write(bn->bd, &rxr->rx_agg_db, rxr->rx_agg_prod); + bnapi->events &= ~BNGE_AGG_EVENT; + } } static void diff --git a/drivers/net/ethernet/broadcom/bnge/bnge_txrx.h b/drivers/net/ethernet/broadcom/bnge/bnge_txrx.h index db699ce86b4..d2c9e6f2e7f 100644 --- a/drivers/net/ethernet/broadcom/bnge/bnge_txrx.h +++ b/drivers/net/ethernet/broadcom/bnge/bnge_txrx.h @@ -109,6 +109,7 @@ static inline void bnge_db_write_relaxed(struct bnge_net *bn, #define ADV_RAW_CMP(idx, n) ((idx) + (n)) #define NEXT_RAW_CMP(idx) ADV_RAW_CMP(idx, 1) #define RING_CMP(bn, idx) ((idx) & (bn)->cp_ring_mask) +#define NEXT_CMP(bn, idx) RING_CMP(bn, ADV_RAW_CMP(idx, 1)) irqreturn_t bnge_msix(int irq, void *dev_instance); netdev_tx_t bnge_start_xmit(struct sk_buff *skb, struct net_device *dev); -- 2.47.3