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[144.49.247.121]) by smtp-relay.gmail.com with ESMTPS id a1e0cc1a2514c-966a04ad22fsm65802241.3.2026.06.14.00.25.33 for (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Sun, 14 Jun 2026 00:25:34 -0700 (PDT) X-Relaying-Domain: broadcom.com X-CFilter-Loop: Reflected Received: by mail-dy1-f198.google.com with SMTP id 5a478bee46e88-304e7fc90b1so2637700eec.1 for ; Sun, 14 Jun 2026 00:25:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; t=1781421933; x=1782026733; 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=N/E6bs9K0Hfh05tfyGfuMM8464HVjsInxnQWQDIDG5I=; b=fI8QLzR8wrjyKSexD+wo9lAFtLOp/vYcDCe+EGouaDYryBLq5GiOUrzKbKf984Ip7b jaeIcsbIfORbVOJyVt3SqcdprysxyJRdGUmoKICcit/Pxk1RZk32gxlJeM7eLCZ941k5 ALKChFVA0LJkr1CqVlNVHEq3OWcEsskIjTIjk= X-Received: by 2002:a05:7300:fe07:b0:304:2cc9:2ba8 with SMTP id 5a478bee46e88-3093ef21d25mr3058145eec.30.1781421932636; Sun, 14 Jun 2026 00:25:32 -0700 (PDT) X-Received: by 2002:a05:7300:fe07:b0:304:2cc9:2ba8 with SMTP id 5a478bee46e88-3093ef21d25mr3058134eec.30.1781421931859; Sun, 14 Jun 2026 00:25:31 -0700 (PDT) Received: from lvnvda3289.lvn.broadcom.net ([192.19.161.250]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-3081ea43bc7sm10043280eec.22.2026.06.14.00.25.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 14 Jun 2026 00:25:31 -0700 (PDT) From: Michael Chan To: davem@davemloft.net Cc: netdev@vger.kernel.org, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, andrew+netdev@lunn.ch, pavan.chebbi@broadcom.com, andrew.gospodarek@broadcom.com Subject: [PATCH net-next v3 10/15] bnxt_en: Add MPC transmit and completion functions Date: Sun, 14 Jun 2026 00:24:02 -0700 Message-ID: <20260614072407.2761092-11-michael.chan@broadcom.com> X-Mailer: git-send-email 2.45.4 In-Reply-To: <20260614072407.2761092-1-michael.chan@broadcom.com> References: <20260614072407.2761092-1-michael.chan@broadcom.com> Precedence: bulk X-Mailing-List: netdev@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 transmit, ring selection, and completion functions for midpath rings. These will be used to send control data to the crypto engines. Reviewed-by: Andy Gospodarek Reviewed-by: Pavan Chebbi Signed-off-by: Michael Chan --- v3: Use WRITE_ONCE() for TX prod/cons. v2: https://lore.kernel.org/netdev/20260512212105.3488258-11-michael.chan@broadcom.com/ Fix unused variable warnings v1: https://lore.kernel.org/netdev/20260504235836.3019499-11-michael.chan@broadcom.com/ --- drivers/net/ethernet/broadcom/bnxt/bnxt.c | 3 + drivers/net/ethernet/broadcom/bnxt/bnxt.h | 2 + drivers/net/ethernet/broadcom/bnxt/bnxt_mpc.c | 157 ++++++++++++++++++ drivers/net/ethernet/broadcom/bnxt/bnxt_mpc.h | 65 ++++++++ 4 files changed, 227 insertions(+) diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c index 6eef518a96b0..dc8957243cc6 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c @@ -3109,6 +3109,9 @@ static int __bnxt_poll_work(struct bnxt *bp, struct bnxt_cp_ring_info *cpr, rx_pkts++; else if (rc == -EBUSY) /* partial completion */ break; + } else if (cmp_type == CMP_TYPE_MPC_CMP) { + if (bnxt_mpc_cmp(bp, cpr, &raw_cons)) + break; } else if (unlikely(cmp_type == CMPL_BASE_TYPE_HWRM_DONE || cmp_type == CMPL_BASE_TYPE_HWRM_FWD_REQ || cmp_type == CMPL_BASE_TYPE_HWRM_ASYNC_EVENT)) { diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h index 53fdc45f8020..7e24949f2238 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h @@ -47,6 +47,7 @@ struct tx_bd { __le32 tx_bd_len_flags_type; #define TX_BD_TYPE (0x3f << 0) #define TX_BD_TYPE_SHORT_TX_BD (0x00 << 0) + #define TX_BD_TYPE_MPC_TX_BD (0x08 << 0) #define TX_BD_TYPE_LONG_TX_BD (0x10 << 0) #define TX_BD_FLAGS_PACKET_END (1 << 6) #define TX_BD_FLAGS_NO_CMPL (1 << 7) @@ -160,6 +161,7 @@ struct tx_cmp { #define CMP_TYPE_RX_TPA_AGG_CMP 22 #define CMP_TYPE_RX_L2_V3_CMP 23 #define CMP_TYPE_RX_L2_TPA_START_V3_CMP 25 + #define CMP_TYPE_MPC_CMP 30 #define CMP_TYPE_STATUS_CMP 32 #define CMP_TYPE_REMOTE_DRIVER_REQ 34 #define CMP_TYPE_REMOTE_DRIVER_RESP 36 diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_mpc.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_mpc.c index cd104b7ff1d7..30f4b3bf181b 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_mpc.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_mpc.c @@ -405,3 +405,160 @@ void bnxt_hwrm_mpc_ring_free(struct bnxt *bp, bool close_path) } } } + +struct bnxt_tx_ring_info *bnxt_select_mpc_ring(struct bnxt *bp, int ring_type) +{ + struct bnxt_mpc_info *mpc = bp->mpc_info; + int n; + + if (!mpc || ring_type >= BNXT_MPC_TYPE_MAX || + !mpc->mpc_ring_count[ring_type]) + return NULL; + + n = raw_smp_processor_id() % mpc->mpc_ring_count[ring_type]; + return &mpc->mpc_rings[ring_type][n]; +} + +/** + * bnxt_start_xmit_mpc - Transmit message on an MPC ring + * @bp: pointer to bnxt device + * @txr: MPC TX ring structure pointer + * @data: MPC message pointer + * @len: MPC message length + * @handle: Non-zero handle passed back for the completion + * + * This function is called to transmit an MPC message on an MPC TX ring. + * The caller must hold txr->tx_lock. When successful, the HW will return + * a completion and bnxt_crypto_mpc_cmp() will be called with the handle + * passed back. + * + * Return: zero on success, negative error code otherwise: + * ENODEV: MPC TX ring is shutting down. + * EBUSY: MPC TX ring is full + */ +int bnxt_start_xmit_mpc(struct bnxt *bp, struct bnxt_tx_ring_info *txr, + void *data, unsigned int len, unsigned long handle) +{ + u32 bds, total_bds, bd_space, free_size; + struct bnxt_sw_mpc_tx_bd *tx_buf; + struct tx_bd *txbd; + u16 prod; + + if (READ_ONCE(txr->dev_state) == BNXT_DEV_STATE_CLOSING) + return -ENODEV; + + bds = DIV_ROUND_UP(len, sizeof(*txbd)); + total_bds = bds + 1; + free_size = bnxt_tx_avail(bp, txr); + if (free_size < total_bds) + return -EBUSY; + + prod = txr->tx_prod; + txbd = &txr->tx_desc_ring[TX_RING(bp, prod)][TX_IDX(prod)]; + tx_buf = &txr->tx_mpc_buf_ring[RING_TX(bp, prod)]; + tx_buf->handle = handle; + tx_buf->inline_bds = total_bds; + + txbd->tx_bd_len_flags_type = + cpu_to_le32((len << TX_BD_LEN_SHIFT) | TX_BD_TYPE_MPC_TX_BD | + TX_BD_CNT(total_bds)); + txbd->tx_bd_opaque = SET_TX_OPAQUE(bp, txr, prod, total_bds); + + prod = NEXT_TX(prod); + txbd = &txr->tx_desc_ring[TX_RING(bp, prod)][TX_IDX(prod)]; + bd_space = TX_DESC_CNT - TX_IDX(prod); + if (bd_space < bds) { + unsigned int len0 = bd_space * sizeof(*txbd); + + memcpy(txbd, data, len0); + prod += bd_space; + txbd = &txr->tx_desc_ring[TX_RING(bp, prod)][TX_IDX(prod)]; + bds -= bd_space; + len -= len0; + data += len0; + } + memcpy(txbd, data, len); + prod += bds; + WRITE_ONCE(txr->tx_prod, prod); + + /* Sync BD data before updating doorbell */ + wmb(); + bnxt_db_write(bp, &txr->tx_db, prod); + + return 0; +} + +static bool bnxt_mpc_unsolicit(struct mpc_cmp *mpcmp) +{ + u32 client = MPC_CMP_CLIENT_TYPE(mpcmp); + + if (client != MPC_CMP_CLIENT_TCE && client != MPC_CMP_CLIENT_RCE) + return false; + return MPC_CMP_UNSOLICIT_SUBTYPE(mpcmp); +} + +int bnxt_mpc_cmp(struct bnxt *bp, struct bnxt_cp_ring_info *cpr, u32 *raw_cons) +{ + struct bnxt_cmpl_entry cmpl_entry_arr[2]; + struct bnxt_napi *bnapi = cpr->bnapi; + u16 cons = RING_CMP(*raw_cons); + struct mpc_cmp *mpcmp, *mpcmp1; + u32 tmp_raw_cons = *raw_cons; + u32 client, cmpl_num; + u8 type; + + mpcmp = (struct mpc_cmp *) + &cpr->cp_desc_ring[CP_RING(cons)][CP_IDX(cons)]; + type = MPC_CMP_CMP_TYPE(mpcmp); + cmpl_entry_arr[0].cmpl = mpcmp; + cmpl_entry_arr[0].len = sizeof(*mpcmp); + cmpl_num = 1; + if (type == MPC_CMP_TYPE_MID_PATH_LONG) { + tmp_raw_cons = NEXT_RAW_CMP(tmp_raw_cons); + cons = RING_CMP(tmp_raw_cons); + mpcmp1 = (struct mpc_cmp *) + &cpr->cp_desc_ring[CP_RING(cons)][CP_IDX(cons)]; + + if (!MPC_CMP_VALID(bp, mpcmp1, tmp_raw_cons)) + return -EBUSY; + /* The valid test of the entry must be done first before + * reading any further. + */ + dma_rmb(); + if (mpcmp1 == mpcmp + 1) { + cmpl_entry_arr[cmpl_num - 1].len += sizeof(*mpcmp1); + } else { + cmpl_entry_arr[cmpl_num].cmpl = mpcmp1; + cmpl_entry_arr[cmpl_num].len = sizeof(*mpcmp1); + cmpl_num++; + } + } + client = MPC_CMP_CLIENT_TYPE(mpcmp) >> MPC_CMP_CLIENT_SFT; + if (client >= BNXT_MPC_TYPE_MAX) + goto cmp_done; + + if (!bnxt_mpc_unsolicit(mpcmp)) { + struct bnxt_sw_mpc_tx_bd *mpc_buf; + struct bnxt_tx_ring_info *txr; + u16 tx_cons; + u32 opaque; + + opaque = mpcmp->mpc_cmp_opaque; + txr = bnapi->tx_mpc_ring[client]; + tx_cons = txr->tx_cons; + if (TX_OPAQUE_RING(opaque) != txr->tx_napi_idx) { + netdev_warn(bp->dev, "Wrong opaque %x, expected ring %x, cons idx %x\n", + opaque, txr->tx_napi_idx, txr->tx_cons); + goto cmp_done; + } + mpc_buf = &txr->tx_mpc_buf_ring[RING_TX(bp, tx_cons)]; + mpc_buf->handle = 0; + tx_cons += mpc_buf->inline_bds; + WRITE_ONCE(txr->tx_cons, tx_cons); + txr->tx_hw_cons = RING_TX(bp, tx_cons); + } + +cmp_done: + *raw_cons = tmp_raw_cons; + return 0; +} diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_mpc.h b/drivers/net/ethernet/broadcom/bnxt/bnxt_mpc.h index cdc03a074963..aa7f2666f0ca 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_mpc.h +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_mpc.h @@ -30,11 +30,53 @@ struct bnxt_mpc_info { }; struct bnxt_sw_mpc_tx_bd { + u8 inline_bds; unsigned long handle; }; #define SW_MPC_TXBD_RING_SIZE (sizeof(struct bnxt_sw_mpc_tx_bd) * TX_DESC_CNT) +struct bnxt_cmpl_entry { + void *cmpl; + u32 len; +}; + +struct mpc_cmp { + __le32 mpc_cmp_client_subtype_type; + #define MPC_CMP_TYPE (0x3f << 0) + #define MPC_CMP_TYPE_MID_PATH_SHORT 0x1e + #define MPC_CMP_TYPE_MID_PATH_LONG 0x1f + #define MPC_CMP_SUBTYPE 0xf00 + #define MPC_CMP_SUBTYPE_SFT 8 + #define MPC_CMP_SUBTYPE_SOLICITED (0x0 << 8) + #define MPC_CMP_SUBTYPE_ERR (0x1 << 8) + #define MPC_CMP_SUBTYPE_RESYNC (0x2 << 8) + #define MPC_CMP_CLIENT (0xf << 12) + #define MPC_CMP_CLIENT_SFT 12 + #define MPC_CMP_CLIENT_TCE (0x0 << 12) + #define MPC_CMP_CLIENT_RCE (0x1 << 12) + #define MPC_CMP_CLIENT_TE_CFA (0x2 << 12) + #define MPC_CMP_CLIENT_RE_CFA (0x3 << 12) + u32 mpc_cmp_opaque; + __le32 mpc_cmp_v; + #define MPC_CMP_V (1 << 0) + __le32 mpc_cmp_filler; +}; + +#define MPC_CMP_CMP_TYPE(mpcmp) \ + (le32_to_cpu((mpcmp)->mpc_cmp_client_subtype_type) & MPC_CMP_TYPE) + +#define MPC_CMP_CLIENT_TYPE(mpcmp) \ + (le32_to_cpu((mpcmp)->mpc_cmp_client_subtype_type) & MPC_CMP_CLIENT) + +#define MPC_CMP_UNSOLICIT_SUBTYPE(mpcmp) \ + ((le32_to_cpu((mpcmp)->mpc_cmp_client_subtype_type) & \ + MPC_CMP_SUBTYPE) != MPC_CMP_SUBTYPE_SOLICITED) + +#define MPC_CMP_VALID(bp, mpcmp, raw_cons) \ + (!!((mpcmp)->mpc_cmp_v & cpu_to_le32(MPC_CMP_V)) == \ + !((raw_cons) & (bp)->cp_bit)) + #define BNXT_MPC_CRYPTO_CAP \ (FUNC_QCAPS_RESP_MPC_CHNLS_CAP_TCE | FUNC_QCAPS_RESP_MPC_CHNLS_CAP_RCE) @@ -61,6 +103,10 @@ void bnxt_free_mpc_rings(struct bnxt *bp); void bnxt_init_mpc_rings(struct bnxt *bp); int bnxt_hwrm_mpc_ring_alloc(struct bnxt *bp); void bnxt_hwrm_mpc_ring_free(struct bnxt *bp, bool close_path); +struct bnxt_tx_ring_info *bnxt_select_mpc_ring(struct bnxt *bp, int ring_type); +int bnxt_start_xmit_mpc(struct bnxt *bp, struct bnxt_tx_ring_info *txr, + void *data, unsigned int len, unsigned long handle); +int bnxt_mpc_cmp(struct bnxt *bp, struct bnxt_cp_ring_info *cpr, u32 *raw_cons); #else static inline void bnxt_alloc_mpc_info(struct bnxt *bp, u8 mpc_chnls_cap) { @@ -132,5 +178,24 @@ static inline int bnxt_hwrm_mpc_ring_alloc(struct bnxt *bp) static inline void bnxt_hwrm_mpc_ring_free(struct bnxt *bp, bool close_path) { } + +static inline struct bnxt_tx_ring_info *bnxt_select_mpc_ring(struct bnxt *bp, + int ring_type) +{ + return NULL; +} + +static inline int bnxt_start_xmit_mpc(struct bnxt *bp, + struct bnxt_tx_ring_info *txr, void *data, + unsigned int len, unsigned long handle) +{ + return -EOPNOTSUPP; +} + +static inline int bnxt_mpc_cmp(struct bnxt *bp, struct bnxt_cp_ring_info *cpr, + u32 *raw_cons) +{ + return 0; +} #endif /* CONFIG_BNXT_TLS */ #endif /* BNXT_MPC_H */ -- 2.51.0