/*- * BSD LICENSE * * Copyright(c) 2010-2014 Intel Corporation. All rights reserved. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * Neither the name of Intel Corporation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "e1000_logs.h" #include "e1000/e1000_api.h" #include "e1000_ethdev.h" #define IGB_RSS_OFFLOAD_ALL ( \ ETH_RSS_IPV4 | \ ETH_RSS_IPV4_TCP | \ ETH_RSS_IPV6 | \ ETH_RSS_IPV6_EX | \ ETH_RSS_IPV6_TCP | \ ETH_RSS_IPV6_TCP_EX | \ ETH_RSS_IPV4_UDP | \ ETH_RSS_IPV6_UDP | \ ETH_RSS_IPV6_UDP_EX) /* Bit Mask to indicate what bits required for building TX context */ #define IGB_TX_OFFLOAD_MASK ( \ PKT_TX_VLAN_PKT | \ PKT_TX_IP_CKSUM | \ PKT_TX_L4_MASK) static inline struct rte_mbuf * rte_rxmbuf_alloc(struct rte_mempool *mp) { struct rte_mbuf *m; m = __rte_mbuf_raw_alloc(mp); __rte_mbuf_sanity_check_raw(m, 0); return (m); } #define RTE_MBUF_DATA_DMA_ADDR(mb) \ (uint64_t) ((mb)->buf_physaddr + (mb)->data_off) #define RTE_MBUF_DATA_DMA_ADDR_DEFAULT(mb) \ (uint64_t) ((mb)->buf_physaddr + RTE_PKTMBUF_HEADROOM) /** * Structure associated with each descriptor of the RX ring of a RX queue. */ struct igb_rx_entry { struct rte_mbuf *mbuf; /**< mbuf associated with RX descriptor. */ }; /** * Structure associated with each descriptor of the TX ring of a TX queue. */ struct igb_tx_entry { struct rte_mbuf *mbuf; /**< mbuf associated with TX desc, if any. */ uint16_t next_id; /**< Index of next descriptor in ring. */ uint16_t last_id; /**< Index of last scattered descriptor. */ }; /** * Structure associated with each RX queue. */ struct igb_rx_queue { struct rte_mempool *mb_pool; /**< mbuf pool to populate RX ring. */ volatile union e1000_adv_rx_desc *rx_ring; /**< RX ring virtual address. */ uint64_t rx_ring_phys_addr; /**< RX ring DMA address. */ volatile uint32_t *rdt_reg_addr; /**< RDT register address. */ volatile uint32_t *rdh_reg_addr; /**< RDH register address. */ struct igb_rx_entry *sw_ring; /**< address of RX software ring. */ struct rte_mbuf *pkt_first_seg; /**< First segment of current packet. */ struct rte_mbuf *pkt_last_seg; /**< Last segment of current packet. */ uint16_t nb_rx_desc; /**< number of RX descriptors. */ uint16_t rx_tail; /**< current value of RDT register. */ uint16_t nb_rx_hold; /**< number of held free RX desc. */ uint16_t rx_free_thresh; /**< max free RX desc to hold. */ uint16_t queue_id; /**< RX queue index. */ uint16_t reg_idx; /**< RX queue register index. */ uint8_t port_id; /**< Device port identifier. */ uint8_t pthresh; /**< Prefetch threshold register. */ uint8_t hthresh; /**< Host threshold register. */ uint8_t wthresh; /**< Write-back threshold register. */ uint8_t crc_len; /**< 0 if CRC stripped, 4 otherwise. */ uint8_t drop_en; /**< If not 0, set SRRCTL.Drop_En. */ }; /** * Hardware context number */ enum igb_advctx_num { IGB_CTX_0 = 0, /**< CTX0 */ IGB_CTX_1 = 1, /**< CTX1 */ IGB_CTX_NUM = 2, /**< CTX_NUM */ }; /** Offload features */ union igb_vlan_macip { uint32_t data; struct { uint16_t l2_l3_len; /**< 7bit L2 and 9b L3 lengths combined */ uint16_t vlan_tci; /**< VLAN Tag Control Identifier (CPU order). */ } f; }; /* * Compare mask for vlan_macip_len.data, * should be in sync with igb_vlan_macip.f layout. * */ #define TX_VLAN_CMP_MASK 0xFFFF0000 /**< VLAN length - 16-bits. */ #define TX_MAC_LEN_CMP_MASK 0x0000FE00 /**< MAC length - 7-bits. */ #define TX_IP_LEN_CMP_MASK 0x000001FF /**< IP length - 9-bits. */ /** MAC+IP length. */ #define TX_MACIP_LEN_CMP_MASK (TX_MAC_LEN_CMP_MASK | TX_IP_LEN_CMP_MASK) /** * Strucutre to check if new context need be built */ struct igb_advctx_info { uint64_t flags; /**< ol_flags related to context build. */ uint32_t cmp_mask; /**< compare mask for vlan_macip_lens */ union igb_vlan_macip vlan_macip_lens; /**< vlan, mac & ip length. */ }; /** * Structure associated with each TX queue. */ struct igb_tx_queue { volatile union e1000_adv_tx_desc *tx_ring; /**< TX ring address */ uint64_t tx_ring_phys_addr; /**< TX ring DMA address. */ struct igb_tx_entry *sw_ring; /**< virtual address of SW ring. */ volatile uint32_t *tdt_reg_addr; /**< Address of TDT register. */ uint32_t txd_type; /**< Device-specific TXD type */ uint16_t nb_tx_desc; /**< number of TX descriptors. */ uint16_t tx_tail; /**< Current value of TDT register. */ uint16_t tx_head; /**< Index of first used TX descriptor. */ uint16_t queue_id; /**< TX queue index. */ uint16_t reg_idx; /**< TX queue register index. */ uint8_t port_id; /**< Device port identifier. */ uint8_t pthresh; /**< Prefetch threshold register. */ uint8_t hthresh; /**< Host threshold register. */ uint8_t wthresh; /**< Write-back threshold register. */ uint32_t ctx_curr; /**< Current used hardware descriptor. */ uint32_t ctx_start; /**< Start context position for transmit queue. */ struct igb_advctx_info ctx_cache[IGB_CTX_NUM]; /**< Hardware context history.*/ }; #if 1 #define RTE_PMD_USE_PREFETCH #endif #ifdef RTE_PMD_USE_PREFETCH #define rte_igb_prefetch(p) rte_prefetch0(p) #else #define rte_igb_prefetch(p) do {} while(0) #endif #ifdef RTE_PMD_PACKET_PREFETCH #define rte_packet_prefetch(p) rte_prefetch1(p) #else #define rte_packet_prefetch(p) do {} while(0) #endif /* * Macro for VMDq feature for 1 GbE NIC. */ #define E1000_VMOLR_SIZE (8) /********************************************************************* * * TX function * **********************************************************************/ /* * Advanced context descriptor are almost same between igb/ixgbe * This is a separate function, looking for optimization opportunity here * Rework required to go with the pre-defined values. */ static inline void igbe_set_xmit_ctx(struct igb_tx_queue* txq, volatile struct e1000_adv_tx_context_desc *ctx_txd, uint64_t ol_flags, uint32_t vlan_macip_lens) { uint32_t type_tucmd_mlhl; uint32_t mss_l4len_idx; uint32_t ctx_idx, ctx_curr; uint32_t cmp_mask; ctx_curr = txq->ctx_curr; ctx_idx = ctx_curr + txq->ctx_start; cmp_mask = 0; type_tucmd_mlhl = 0; if (ol_flags & PKT_TX_VLAN_PKT) { cmp_mask |= TX_VLAN_CMP_MASK; } if (ol_flags & PKT_TX_IP_CKSUM) { type_tucmd_mlhl = E1000_ADVTXD_TUCMD_IPV4; cmp_mask |= TX_MACIP_LEN_CMP_MASK; } /* Specify which HW CTX to upload. */ mss_l4len_idx = (ctx_idx << E1000_ADVTXD_IDX_SHIFT); switch (ol_flags & PKT_TX_L4_MASK) { case PKT_TX_UDP_CKSUM: type_tucmd_mlhl |= E1000_ADVTXD_TUCMD_L4T_UDP | E1000_ADVTXD_DTYP_CTXT | E1000_ADVTXD_DCMD_DEXT; mss_l4len_idx |= sizeof(struct udp_hdr) << E1000_ADVTXD_L4LEN_SHIFT; cmp_mask |= TX_MACIP_LEN_CMP_MASK; break; case PKT_TX_TCP_CKSUM: type_tucmd_mlhl |= E1000_ADVTXD_TUCMD_L4T_TCP | E1000_ADVTXD_DTYP_CTXT | E1000_ADVTXD_DCMD_DEXT; mss_l4len_idx |= sizeof(struct tcp_hdr) << E1000_ADVTXD_L4LEN_SHIFT; cmp_mask |= TX_MACIP_LEN_CMP_MASK; break; case PKT_TX_SCTP_CKSUM: type_tucmd_mlhl |= E1000_ADVTXD_TUCMD_L4T_SCTP | E1000_ADVTXD_DTYP_CTXT | E1000_ADVTXD_DCMD_DEXT; mss_l4len_idx |= sizeof(struct sctp_hdr) << E1000_ADVTXD_L4LEN_SHIFT; cmp_mask |= TX_MACIP_LEN_CMP_MASK; break; default: type_tucmd_mlhl |= E1000_ADVTXD_TUCMD_L4T_RSV | E1000_ADVTXD_DTYP_CTXT | E1000_ADVTXD_DCMD_DEXT; break; } txq->ctx_cache[ctx_curr].flags = ol_flags; txq->ctx_cache[ctx_curr].cmp_mask = cmp_mask; txq->ctx_cache[ctx_curr].vlan_macip_lens.data = vlan_macip_lens & cmp_mask; ctx_txd->type_tucmd_mlhl = rte_cpu_to_le_32(type_tucmd_mlhl); ctx_txd->vlan_macip_lens = rte_cpu_to_le_32(vlan_macip_lens); ctx_txd->mss_l4len_idx = rte_cpu_to_le_32(mss_l4len_idx); ctx_txd->seqnum_seed = 0; } /* * Check which hardware context can be used. Use the existing match * or create a new context descriptor. */ static inline uint32_t what_advctx_update(struct igb_tx_queue *txq, uint64_t flags, uint32_t vlan_macip_lens) { /* If match with the current context */ if (likely((txq->ctx_cache[txq->ctx_curr].flags == flags) && (txq->ctx_cache[txq->ctx_curr].vlan_macip_lens.data == (txq->ctx_cache[txq->ctx_curr].cmp_mask & vlan_macip_lens)))) { return txq->ctx_curr; } /* If match with the second context */ txq->ctx_curr ^= 1; if (likely((txq->ctx_cache[txq->ctx_curr].flags == flags) && (txq->ctx_cache[txq->ctx_curr].vlan_macip_lens.data == (txq->ctx_cache[txq->ctx_curr].cmp_mask & vlan_macip_lens)))) { return txq->ctx_curr; } /* Mismatch, use the previous context */ return (IGB_CTX_NUM); } static inline uint32_t tx_desc_cksum_flags_to_olinfo(uint64_t ol_flags) { static const uint32_t l4_olinfo[2] = {0, E1000_ADVTXD_POPTS_TXSM}; static const uint32_t l3_olinfo[2] = {0, E1000_ADVTXD_POPTS_IXSM}; uint32_t tmp; tmp = l4_olinfo[(ol_flags & PKT_TX_L4_MASK) != PKT_TX_L4_NO_CKSUM]; tmp |= l3_olinfo[(ol_flags & PKT_TX_IP_CKSUM) != 0]; return tmp; } static inline uint32_t tx_desc_vlan_flags_to_cmdtype(uint64_t ol_flags) { static uint32_t vlan_cmd[2] = {0, E1000_ADVTXD_DCMD_VLE}; return vlan_cmd[(ol_flags & PKT_TX_VLAN_PKT) != 0]; } uint16_t eth_igb_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts) { struct igb_tx_queue *txq; struct igb_tx_entry *sw_ring; struct igb_tx_entry *txe, *txn; volatile union e1000_adv_tx_desc *txr; volatile union e1000_adv_tx_desc *txd; struct rte_mbuf *tx_pkt; struct rte_mbuf *m_seg; union igb_vlan_macip vlan_macip_lens; union { uint16_t u16; struct { uint16_t l3_len:9; uint16_t l2_len:7; }; } l2_l3_len; uint64_t buf_dma_addr; uint32_t olinfo_status; uint32_t cmd_type_len; uint32_t pkt_len; uint16_t slen; uint64_t ol_flags; uint16_t tx_end; uint16_t tx_id; uint16_t tx_last; uint16_t nb_tx; uint64_t tx_ol_req; uint32_t new_ctx = 0; uint32_t ctx = 0; txq = tx_queue; sw_ring = txq->sw_ring; txr = txq->tx_ring; tx_id = txq->tx_tail; txe = &sw_ring[tx_id]; for (nb_tx = 0; nb_tx < nb_pkts; nb_tx++) { tx_pkt = *tx_pkts++; pkt_len = tx_pkt->pkt_len; RTE_MBUF_PREFETCH_TO_FREE(txe->mbuf); /* * The number of descriptors that must be allocated for a * packet is the number of segments of that packet, plus 1 * Context Descriptor for the VLAN Tag Identifier, if any. * Determine the last TX descriptor to allocate in the TX ring * for the packet, starting from the current position (tx_id) * in the ring. */ tx_last = (uint16_t) (tx_id + tx_pkt->nb_segs - 1); ol_flags = tx_pkt->ol_flags; l2_l3_len.l2_len = tx_pkt->l2_len; l2_l3_len.l3_len = tx_pkt->l3_len; vlan_macip_lens.f.vlan_tci = tx_pkt->vlan_tci; vlan_macip_lens.f.l2_l3_len = l2_l3_len.u16; tx_ol_req = ol_flags & IGB_TX_OFFLOAD_MASK; /* If a Context Descriptor need be built . */ if (tx_ol_req) { ctx = what_advctx_update(txq, tx_ol_req, vlan_macip_lens.data); /* Only allocate context descriptor if required*/ new_ctx = (ctx == IGB_CTX_NUM); ctx = txq->ctx_curr; tx_last = (uint16_t) (tx_last + new_ctx); } if (tx_last >= txq->nb_tx_desc) tx_last = (uint16_t) (tx_last - txq->nb_tx_desc); PMD_TX_LOG(DEBUG, "port_id=%u queue_id=%u pktlen=%u" " tx_first=%u tx_last=%u", (unsigned) txq->port_id, (unsigned) txq->queue_id, (unsigned) pkt_len, (unsigned) tx_id, (unsigned) tx_last); /* * Check if there are enough free descriptors in the TX ring * to transmit the next packet. * This operation is based on the two following rules: * * 1- Only check that the last needed TX descriptor can be * allocated (by construction, if that descriptor is free, * all intermediate ones are also free). * * For this purpose, the index of the last TX descriptor * used for a packet (the "last descriptor" of a packet) * is recorded in the TX entries (the last one included) * that are associated with all TX descriptors allocated * for that packet. * * 2- Avoid to allocate the last free TX descriptor of the * ring, in order to never set the TDT register with the * same value stored in parallel by the NIC in the TDH * register, which makes the TX engine of the NIC enter * in a deadlock situation. * * By extension, avoid to allocate a free descriptor that * belongs to the last set of free descriptors allocated * to the same packet previously transmitted. */ /* * The "last descriptor" of the previously sent packet, if any, * which used the last descriptor to allocate. */ tx_end = sw_ring[tx_last].last_id; /* * The next descriptor following that "last descriptor" in the * ring. */ tx_end = sw_ring[tx_end].next_id; /* * The "last descriptor" associated with that next descriptor. */ tx_end = sw_ring[tx_end].last_id; /* * Check that this descriptor is free. */ if (! (txr[tx_end].wb.status & E1000_TXD_STAT_DD)) { if (nb_tx == 0) return (0); goto end_of_tx; } /* * Set common flags of all TX Data Descriptors. * * The following bits must be set in all Data Descriptors: * - E1000_ADVTXD_DTYP_DATA * - E1000_ADVTXD_DCMD_DEXT * * The following bits must be set in the first Data Descriptor * and are ignored in the other ones: * - E1000_ADVTXD_DCMD_IFCS * - E1000_ADVTXD_MAC_1588 * - E1000_ADVTXD_DCMD_VLE * * The following bits must only be set in the last Data * Descriptor: * - E1000_TXD_CMD_EOP * * The following bits can be set in any Data Descriptor, but * are only set in the last Data Descriptor: * - E1000_TXD_CMD_RS */ cmd_type_len = txq->txd_type | E1000_ADVTXD_DCMD_IFCS | E1000_ADVTXD_DCMD_DEXT; olinfo_status = (pkt_len << E1000_ADVTXD_PAYLEN_SHIFT); #if defined(RTE_LIBRTE_IEEE1588) if (ol_flags & PKT_TX_IEEE1588_TMST) cmd_type_len |= E1000_ADVTXD_MAC_TSTAMP; #endif if (tx_ol_req) { /* Setup TX Advanced context descriptor if required */ if (new_ctx) { volatile struct e1000_adv_tx_context_desc * ctx_txd; ctx_txd = (volatile struct e1000_adv_tx_context_desc *) &txr[tx_id]; txn = &sw_ring[txe->next_id]; RTE_MBUF_PREFETCH_TO_FREE(txn->mbuf); if (txe->mbuf != NULL) { rte_pktmbuf_free_seg(txe->mbuf); txe->mbuf = NULL; } igbe_set_xmit_ctx(txq, ctx_txd, tx_ol_req, vlan_macip_lens.data); txe->last_id = tx_last; tx_id = txe->next_id; txe = txn; } /* Setup the TX Advanced Data Descriptor */ cmd_type_len |= tx_desc_vlan_flags_to_cmdtype(ol_flags); olinfo_status |= tx_desc_cksum_flags_to_olinfo(ol_flags); olinfo_status |= (ctx << E1000_ADVTXD_IDX_SHIFT); } m_seg = tx_pkt; do { txn = &sw_ring[txe->next_id]; txd = &txr[tx_id]; if (txe->mbuf != NULL) rte_pktmbuf_free_seg(txe->mbuf); txe->mbuf = m_seg; /* * Set up transmit descriptor. */ slen = (uint16_t) m_seg->data_len; buf_dma_addr = RTE_MBUF_DATA_DMA_ADDR(m_seg); txd->read.buffer_addr = rte_cpu_to_le_64(buf_dma_addr); txd->read.cmd_type_len = rte_cpu_to_le_32(cmd_type_len | slen); txd->read.olinfo_status = rte_cpu_to_le_32(olinfo_status); txe->last_id = tx_last; tx_id = txe->next_id; txe = txn; m_seg = m_seg->next; } while (m_seg != NULL); /* * The last packet data descriptor needs End Of Packet (EOP) * and Report Status (RS). */ txd->read.cmd_type_len |= rte_cpu_to_le_32(E1000_TXD_CMD_EOP | E1000_TXD_CMD_RS); } end_of_tx: rte_wmb(); /* * Set the Transmit Descriptor Tail (TDT). */ E1000_PCI_REG_WRITE(txq->tdt_reg_addr, tx_id); PMD_TX_LOG(DEBUG, "port_id=%u queue_id=%u tx_tail=%u nb_tx=%u", (unsigned) txq->port_id, (unsigned) txq->queue_id, (unsigned) tx_id, (unsigned) nb_tx); txq->tx_tail = tx_id; return (nb_tx); } /********************************************************************* * * RX functions * **********************************************************************/ static inline uint64_t rx_desc_hlen_type_rss_to_pkt_flags(uint32_t hl_tp_rs) { uint64_t pkt_flags; static uint64_t ip_pkt_types_map[16] = { 0, PKT_RX_IPV4_HDR, PKT_RX_IPV4_HDR_EXT, PKT_RX_IPV4_HDR_EXT, PKT_RX_IPV6_HDR, 0, 0, 0, PKT_RX_IPV6_HDR_EXT, 0, 0, 0, PKT_RX_IPV6_HDR_EXT, 0, 0, 0, }; #if defined(RTE_LIBRTE_IEEE1588) static uint32_t ip_pkt_etqf_map[8] = { 0, 0, 0, PKT_RX_IEEE1588_PTP, 0, 0, 0, 0, }; pkt_flags = (hl_tp_rs & E1000_RXDADV_PKTTYPE_ETQF) ? ip_pkt_etqf_map[(hl_tp_rs >> 4) & 0x07] : ip_pkt_types_map[(hl_tp_rs >> 4) & 0x0F]; #else pkt_flags = (hl_tp_rs & E1000_RXDADV_PKTTYPE_ETQF) ? 0 : ip_pkt_types_map[(hl_tp_rs >> 4) & 0x0F]; #endif return pkt_flags | (((hl_tp_rs & 0x0F) == 0) ? 0 : PKT_RX_RSS_HASH); } static inline uint64_t rx_desc_status_to_pkt_flags(uint32_t rx_status) { uint64_t pkt_flags; /* Check if VLAN present */ pkt_flags = (rx_status & E1000_RXD_STAT_VP) ? PKT_RX_VLAN_PKT : 0; #if defined(RTE_LIBRTE_IEEE1588) if (rx_status & E1000_RXD_STAT_TMST) pkt_flags = pkt_flags | PKT_RX_IEEE1588_TMST; #endif return pkt_flags; } static inline uint64_t rx_desc_error_to_pkt_flags(uint32_t rx_status) { /* * Bit 30: IPE, IPv4 checksum error * Bit 29: L4I, L4I integrity error */ static uint64_t error_to_pkt_flags_map[4] = { 0, PKT_RX_L4_CKSUM_BAD, PKT_RX_IP_CKSUM_BAD, PKT_RX_IP_CKSUM_BAD | PKT_RX_L4_CKSUM_BAD }; return error_to_pkt_flags_map[(rx_status >> E1000_RXD_ERR_CKSUM_BIT) & E1000_RXD_ERR_CKSUM_MSK]; } uint16_t eth_igb_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts) { struct igb_rx_queue *rxq; volatile union e1000_adv_rx_desc *rx_ring; volatile union e1000_adv_rx_desc *rxdp; struct igb_rx_entry *sw_ring; struct igb_rx_entry *rxe; struct rte_mbuf *rxm; struct rte_mbuf *nmb; union e1000_adv_rx_desc rxd; uint64_t dma_addr; uint32_t staterr; uint32_t hlen_type_rss; uint16_t pkt_len; uint16_t rx_id; uint16_t nb_rx; uint16_t nb_hold; uint64_t pkt_flags; nb_rx = 0; nb_hold = 0; rxq = rx_queue; rx_id = rxq->rx_tail; rx_ring = rxq->rx_ring; sw_ring = rxq->sw_ring; while (nb_rx < nb_pkts) { /* * The order of operations here is important as the DD status * bit must not be read after any other descriptor fields. * rx_ring and rxdp are pointing to volatile data so the order * of accesses cannot be reordered by the compiler. If they were * not volatile, they could be reordered which could lead to * using invalid descriptor fields when read from rxd. */ rxdp = &rx_ring[rx_id]; staterr = rxdp->wb.upper.status_error; if (! (staterr & rte_cpu_to_le_32(E1000_RXD_STAT_DD))) break; rxd = *rxdp; /* * End of packet. * * If the E1000_RXD_STAT_EOP flag is not set, the RX packet is * likely to be invalid and to be dropped by the various * validation checks performed by the network stack. * * Allocate a new mbuf to replenish the RX ring descriptor. * If the allocation fails: * - arrange for that RX descriptor to be the first one * being parsed the next time the receive function is * invoked [on the same queue]. * * - Stop parsing the RX ring and return immediately. * * This policy do not drop the packet received in the RX * descriptor for which the allocation of a new mbuf failed. * Thus, it allows that packet to be later retrieved if * mbuf have been freed in the mean time. * As a side effect, holding RX descriptors instead of * systematically giving them back to the NIC may lead to * RX ring exhaustion situations. * However, the NIC can gracefully prevent such situations * to happen by sending specific "back-pressure" flow control * frames to its peer(s). */ PMD_RX_LOG(DEBUG, "port_id=%u queue_id=%u rx_id=%u " "staterr=0x%x pkt_len=%u", (unsigned) rxq->port_id, (unsigned) rxq->queue_id, (unsigned) rx_id, (unsigned) staterr, (unsigned) rte_le_to_cpu_16(rxd.wb.upper.length)); nmb = rte_rxmbuf_alloc(rxq->mb_pool); if (nmb == NULL) { PMD_RX_LOG(DEBUG, "RX mbuf alloc failed port_id=%u " "queue_id=%u", (unsigned) rxq->port_id, (unsigned) rxq->queue_id); rte_eth_devices[rxq->port_id].data->rx_mbuf_alloc_failed++; break; } nb_hold++; rxe = &sw_ring[rx_id]; rx_id++; if (rx_id == rxq->nb_rx_desc) rx_id = 0; /* Prefetch next mbuf while processing current one. */ rte_igb_prefetch(sw_ring[rx_id].mbuf); /* * When next RX descriptor is on a cache-line boundary, * prefetch the next 4 RX descriptors and the next 8 pointers * to mbufs. */ if ((rx_id & 0x3) == 0) { rte_igb_prefetch(&rx_ring[rx_id]); rte_igb_prefetch(&sw_ring[rx_id]); } rxm = rxe->mbuf; rxe->mbuf = nmb; dma_addr = rte_cpu_to_le_64(RTE_MBUF_DATA_DMA_ADDR_DEFAULT(nmb)); rxdp->read.hdr_addr = dma_addr; rxdp->read.pkt_addr = dma_addr; /* * Initialize the returned mbuf. * 1) setup generic mbuf fields: * - number of segments, * - next segment, * - packet length, * - RX port identifier. * 2) integrate hardware offload data, if any: * - RSS flag & hash, * - IP checksum flag, * - VLAN TCI, if any, * - error flags. */ pkt_len = (uint16_t) (rte_le_to_cpu_16(rxd.wb.upper.length) - rxq->crc_len); rxm->data_off = RTE_PKTMBUF_HEADROOM; rte_packet_prefetch((char *)rxm->buf_addr + rxm->data_off); rxm->nb_segs = 1; rxm->next = NULL; rxm->pkt_len = pkt_len; rxm->data_len = pkt_len; rxm->port = rxq->port_id; rxm->hash.rss = rxd.wb.lower.hi_dword.rss; hlen_type_rss = rte_le_to_cpu_32(rxd.wb.lower.lo_dword.data); /* Only valid if PKT_RX_VLAN_PKT set in pkt_flags */ rxm->vlan_tci = rte_le_to_cpu_16(rxd.wb.upper.vlan); pkt_flags = rx_desc_hlen_type_rss_to_pkt_flags(hlen_type_rss); pkt_flags = pkt_flags | rx_desc_status_to_pkt_flags(staterr); pkt_flags = pkt_flags | rx_desc_error_to_pkt_flags(staterr); rxm->ol_flags = pkt_flags; /* * Store the mbuf address into the next entry of the array * of returned packets. */ rx_pkts[nb_rx++] = rxm; } rxq->rx_tail = rx_id; /* * If the number of free RX descriptors is greater than the RX free * threshold of the queue, advance the Receive Descriptor Tail (RDT) * register. * Update the RDT with the value of the last processed RX descriptor * minus 1, to guarantee that the RDT register is never equal to the * RDH register, which creates a "full" ring situtation from the * hardware point of view... */ nb_hold = (uint16_t) (nb_hold + rxq->nb_rx_hold); if (nb_hold > rxq->rx_free_thresh) { PMD_RX_LOG(DEBUG, "port_id=%u queue_id=%u rx_tail=%u " "nb_hold=%u nb_rx=%u", (unsigned) rxq->port_id, (unsigned) rxq->queue_id, (unsigned) rx_id, (unsigned) nb_hold, (unsigned) nb_rx); rx_id = (uint16_t) ((rx_id == 0) ? (rxq->nb_rx_desc - 1) : (rx_id - 1)); E1000_PCI_REG_WRITE(rxq->rdt_reg_addr, rx_id); nb_hold = 0; } rxq->nb_rx_hold = nb_hold; return (nb_rx); } uint16_t eth_igb_recv_scattered_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts) { struct igb_rx_queue *rxq; volatile union e1000_adv_rx_desc *rx_ring; volatile union e1000_adv_rx_desc *rxdp; struct igb_rx_entry *sw_ring; struct igb_rx_entry *rxe; struct rte_mbuf *first_seg; struct rte_mbuf *last_seg; struct rte_mbuf *rxm; struct rte_mbuf *nmb; union e1000_adv_rx_desc rxd; uint64_t dma; /* Physical address of mbuf data buffer */ uint32_t staterr; uint32_t hlen_type_rss; uint16_t rx_id; uint16_t nb_rx; uint16_t nb_hold; uint16_t data_len; uint64_t pkt_flags; nb_rx = 0; nb_hold = 0; rxq = rx_queue; rx_id = rxq->rx_tail; rx_ring = rxq->rx_ring; sw_ring = rxq->sw_ring; /* * Retrieve RX context of current packet, if any. */ first_seg = rxq->pkt_first_seg; last_seg = rxq->pkt_last_seg; while (nb_rx < nb_pkts) { next_desc: /* * The order of operations here is important as the DD status * bit must not be read after any other descriptor fields. * rx_ring and rxdp are pointing to volatile data so the order * of accesses cannot be reordered by the compiler. If they were * not volatile, they could be reordered which could lead to * using invalid descriptor fields when read from rxd. */ rxdp = &rx_ring[rx_id]; staterr = rxdp->wb.upper.status_error; if (! (staterr & rte_cpu_to_le_32(E1000_RXD_STAT_DD))) break; rxd = *rxdp; /* * Descriptor done. * * Allocate a new mbuf to replenish the RX ring descriptor. * If the allocation fails: * - arrange for that RX descriptor to be the first one * being parsed the next time the receive function is * invoked [on the same queue]. * * - Stop parsing the RX ring and return immediately. * * This policy does not drop the packet received in the RX * descriptor for which the allocation of a new mbuf failed. * Thus, it allows that packet to be later retrieved if * mbuf have been freed in the mean time. * As a side effect, holding RX descriptors instead of * systematically giving them back to the NIC may lead to * RX ring exhaustion situations. * However, the NIC can gracefully prevent such situations * to happen by sending specific "back-pressure" flow control * frames to its peer(s). */ PMD_RX_LOG(DEBUG, "port_id=%u queue_id=%u rx_id=%u " "staterr=0x%x data_len=%u", (unsigned) rxq->port_id, (unsigned) rxq->queue_id, (unsigned) rx_id, (unsigned) staterr, (unsigned) rte_le_to_cpu_16(rxd.wb.upper.length)); nmb = rte_rxmbuf_alloc(rxq->mb_pool); if (nmb == NULL) { PMD_RX_LOG(DEBUG, "RX mbuf alloc failed port_id=%u " "queue_id=%u", (unsigned) rxq->port_id, (unsigned) rxq->queue_id); rte_eth_devices[rxq->port_id].data->rx_mbuf_alloc_failed++; break; } nb_hold++; rxe = &sw_ring[rx_id]; rx_id++; if (rx_id == rxq->nb_rx_desc) rx_id = 0; /* Prefetch next mbuf while processing current one. */ rte_igb_prefetch(sw_ring[rx_id].mbuf); /* * When next RX descriptor is on a cache-line boundary, * prefetch the next 4 RX descriptors and the next 8 pointers * to mbufs. */ if ((rx_id & 0x3) == 0) { rte_igb_prefetch(&rx_ring[rx_id]); rte_igb_prefetch(&sw_ring[rx_id]); } /* * Update RX descriptor with the physical address of the new * data buffer of the new allocated mbuf. */ rxm = rxe->mbuf; rxe->mbuf = nmb; dma = rte_cpu_to_le_64(RTE_MBUF_DATA_DMA_ADDR_DEFAULT(nmb)); rxdp->read.pkt_addr = dma; rxdp->read.hdr_addr = dma; /* * Set data length & data buffer address of mbuf. */ data_len = rte_le_to_cpu_16(rxd.wb.upper.length); rxm->data_len = data_len; rxm->data_off = RTE_PKTMBUF_HEADROOM; /* * If this is the first buffer of the received packet, * set the pointer to the first mbuf of the packet and * initialize its context. * Otherwise, update the total length and the number of segments * of the current scattered packet, and update the pointer to * the last mbuf of the current packet. */ if (first_seg == NULL) { first_seg = rxm; first_seg->pkt_len = data_len; first_seg->nb_segs = 1; } else { first_seg->pkt_len += data_len; first_seg->nb_segs++; last_seg->next = rxm; } /* * If this is not the last buffer of the received packet, * update the pointer to the last mbuf of the current scattered * packet and continue to parse the RX ring. */ if (! (staterr & E1000_RXD_STAT_EOP)) { last_seg = rxm; goto next_desc; } /* * This is the last buffer of the received packet. * If the CRC is not stripped by the hardware: * - Subtract the CRC length from the total packet length. * - If the last buffer only contains the whole CRC or a part * of it, free the mbuf associated to the last buffer. * If part of the CRC is also contained in the previous * mbuf, subtract the length of that CRC part from the * data length of the previous mbuf. */ rxm->next = NULL; if (unlikely(rxq->crc_len > 0)) { first_seg->pkt_len -= ETHER_CRC_LEN; if (data_len <= ETHER_CRC_LEN) { rte_pktmbuf_free_seg(rxm); first_seg->nb_segs--; last_seg->data_len = (uint16_t) (last_seg->data_len - (ETHER_CRC_LEN - data_len)); last_seg->next = NULL; } else rxm->data_len = (uint16_t) (data_len - ETHER_CRC_LEN); } /* * Initialize the first mbuf of the returned packet: * - RX port identifier, * - hardware offload data, if any: * - RSS flag & hash, * - IP checksum flag, * - VLAN TCI, if any, * - error flags. */ first_seg->port = rxq->port_id; first_seg->hash.rss = rxd.wb.lower.hi_dword.rss; /* * The vlan_tci field is only valid when PKT_RX_VLAN_PKT is * set in the pkt_flags field. */ first_seg->vlan_tci = rte_le_to_cpu_16(rxd.wb.upper.vlan); hlen_type_rss = rte_le_to_cpu_32(rxd.wb.lower.lo_dword.data); pkt_flags = rx_desc_hlen_type_rss_to_pkt_flags(hlen_type_rss); pkt_flags = pkt_flags | rx_desc_status_to_pkt_flags(staterr); pkt_flags = pkt_flags | rx_desc_error_to_pkt_flags(staterr); first_seg->ol_flags = pkt_flags; /* Prefetch data of first segment, if configured to do so. */ rte_packet_prefetch((char *)first_seg->buf_addr + first_seg->data_off); /* * Store the mbuf address into the next entry of the array * of returned packets. */ rx_pkts[nb_rx++] = first_seg; /* * Setup receipt context for a new packet. */ first_seg = NULL; } /* * Record index of the next RX descriptor to probe. */ rxq->rx_tail = rx_id; /* * Save receive context. */ rxq->pkt_first_seg = first_seg; rxq->pkt_last_seg = last_seg; /* * If the number of free RX descriptors is greater than the RX free * threshold of the queue, advance the Receive Descriptor Tail (RDT) * register. * Update the RDT with the value of the last processed RX descriptor * minus 1, to guarantee that the RDT register is never equal to the * RDH register, which creates a "full" ring situtation from the * hardware point of view... */ nb_hold = (uint16_t) (nb_hold + rxq->nb_rx_hold); if (nb_hold > rxq->rx_free_thresh) { PMD_RX_LOG(DEBUG, "port_id=%u queue_id=%u rx_tail=%u " "nb_hold=%u nb_rx=%u", (unsigned) rxq->port_id, (unsigned) rxq->queue_id, (unsigned) rx_id, (unsigned) nb_hold, (unsigned) nb_rx); rx_id = (uint16_t) ((rx_id == 0) ? (rxq->nb_rx_desc - 1) : (rx_id - 1)); E1000_PCI_REG_WRITE(rxq->rdt_reg_addr, rx_id); nb_hold = 0; } rxq->nb_rx_hold = nb_hold; return (nb_rx); } /* * Rings setup and release. * * TDBA/RDBA should be aligned on 16 byte boundary. But TDLEN/RDLEN should be * multiple of 128 bytes. So we align TDBA/RDBA on 128 byte boundary. * This will also optimize cache line size effect. * H/W supports up to cache line size 128. */ #define IGB_ALIGN 128 /* * Maximum number of Ring Descriptors. * * Since RDLEN/TDLEN should be multiple of 128bytes, the number of ring * desscriptors should meet the following condition: * (num_ring_desc * sizeof(struct e1000_rx/tx_desc)) % 128 == 0 */ #define IGB_MIN_RING_DESC 32 #define IGB_MAX_RING_DESC 4096 static const struct rte_memzone * ring_dma_zone_reserve(struct rte_eth_dev *dev, const char *ring_name, uint16_t queue_id, uint32_t ring_size, int socket_id) { char z_name[RTE_MEMZONE_NAMESIZE]; const struct rte_memzone *mz; snprintf(z_name, sizeof(z_name), "%s_%s_%d_%d", dev->driver->pci_drv.name, ring_name, dev->data->port_id, queue_id); mz = rte_memzone_lookup(z_name); if (mz) return mz; #ifdef RTE_LIBRTE_XEN_DOM0 return rte_memzone_reserve_bounded(z_name, ring_size, socket_id, 0, IGB_ALIGN, RTE_PGSIZE_2M); #else return rte_memzone_reserve_aligned(z_name, ring_size, socket_id, 0, IGB_ALIGN); #endif } static void igb_tx_queue_release_mbufs(struct igb_tx_queue *txq) { unsigned i; if (txq->sw_ring != NULL) { for (i = 0; i < txq->nb_tx_desc; i++) { if (txq->sw_ring[i].mbuf != NULL) { rte_pktmbuf_free_seg(txq->sw_ring[i].mbuf); txq->sw_ring[i].mbuf = NULL; } } } } static void igb_tx_queue_release(struct igb_tx_queue *txq) { if (txq != NULL) { igb_tx_queue_release_mbufs(txq); rte_free(txq->sw_ring); rte_free(txq); } } void eth_igb_tx_queue_release(void *txq) { igb_tx_queue_release(txq); } static void igb_reset_tx_queue_stat(struct igb_tx_queue *txq) { txq->tx_head = 0; txq->tx_tail = 0; txq->ctx_curr = 0; memset((void*)&txq->ctx_cache, 0, IGB_CTX_NUM * sizeof(struct igb_advctx_info)); } static void igb_reset_tx_queue(struct igb_tx_queue *txq, struct rte_eth_dev *dev) { static const union e1000_adv_tx_desc zeroed_desc = { .read = { .buffer_addr = 0}}; struct igb_tx_entry *txe = txq->sw_ring; uint16_t i, prev; struct e1000_hw *hw; hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private); /* Zero out HW ring memory */ for (i = 0; i < txq->nb_tx_desc; i++) { txq->tx_ring[i] = zeroed_desc; } /* Initialize ring entries */ prev = (uint16_t)(txq->nb_tx_desc - 1); for (i = 0; i < txq->nb_tx_desc; i++) { volatile union e1000_adv_tx_desc *txd = &(txq->tx_ring[i]); txd->wb.status = E1000_TXD_STAT_DD; txe[i].mbuf = NULL; txe[i].last_id = i; txe[prev].next_id = i; prev = i; } txq->txd_type = E1000_ADVTXD_DTYP_DATA; /* 82575 specific, each tx queue will use 2 hw contexts */ if (hw->mac.type == e1000_82575) txq->ctx_start = txq->queue_id * IGB_CTX_NUM; igb_reset_tx_queue_stat(txq); } int eth_igb_tx_queue_setup(struct rte_eth_dev *dev, uint16_t queue_idx, uint16_t nb_desc, unsigned int socket_id, const struct rte_eth_txconf *tx_conf) { const struct rte_memzone *tz; struct igb_tx_queue *txq; struct e1000_hw *hw; uint32_t size; hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private); /* * Validate number of transmit descriptors. * It must not exceed hardware maximum, and must be multiple * of IGB_ALIGN. */ if (((nb_desc * sizeof(union e1000_adv_tx_desc)) % IGB_ALIGN) != 0 || (nb_desc > IGB_MAX_RING_DESC) || (nb_desc < IGB_MIN_RING_DESC)) { return -EINVAL; } /* * The tx_free_thresh and tx_rs_thresh values are not used in the 1G * driver. */ if (tx_conf->tx_free_thresh != 0) PMD_INIT_LOG(WARNING, "The tx_free_thresh parameter is not " "used for the 1G driver."); if (tx_conf->tx_rs_thresh != 0) PMD_INIT_LOG(WARNING, "The tx_rs_thresh parameter is not " "used for the 1G driver."); if (tx_conf->tx_thresh.wthresh == 0) PMD_INIT_LOG(WARNING, "To improve 1G driver performance, " "consider setting the TX WTHRESH value to 4, 8, " "or 16."); /* Free memory prior to re-allocation if needed */ if (dev->data->tx_queues[queue_idx] != NULL) { igb_tx_queue_release(dev->data->tx_queues[queue_idx]); dev->data->tx_queues[queue_idx] = NULL; } /* First allocate the tx queue data structure */ txq = rte_zmalloc("ethdev TX queue", sizeof(struct igb_tx_queue), RTE_CACHE_LINE_SIZE); if (txq == NULL) return (-ENOMEM); /* * Allocate TX ring hardware descriptors. A memzone large enough to * handle the maximum ring size is allocated in order to allow for * resizing in later calls to the queue setup function. */ size = sizeof(union e1000_adv_tx_desc) * IGB_MAX_RING_DESC; tz = ring_dma_zone_reserve(dev, "tx_ring", queue_idx, size, socket_id); if (tz == NULL) { igb_tx_queue_release(txq); return (-ENOMEM); } txq->nb_tx_desc = nb_desc; txq->pthresh = tx_conf->tx_thresh.pthresh; txq->hthresh = tx_conf->tx_thresh.hthresh; txq->wthresh = tx_conf->tx_thresh.wthresh; if (txq->wthresh > 0 && hw->mac.type == e1000_82576) txq->wthresh = 1; txq->queue_id = queue_idx; txq->reg_idx = (uint16_t)((RTE_ETH_DEV_SRIOV(dev).active == 0) ? queue_idx : RTE_ETH_DEV_SRIOV(dev).def_pool_q_idx + queue_idx); txq->port_id = dev->data->port_id; txq->tdt_reg_addr = E1000_PCI_REG_ADDR(hw, E1000_TDT(txq->reg_idx)); #ifndef RTE_LIBRTE_XEN_DOM0 txq->tx_ring_phys_addr = (uint64_t) tz->phys_addr; #else txq->tx_ring_phys_addr = rte_mem_phy2mch(tz->memseg_id, tz->phys_addr); #endif txq->tx_ring = (union e1000_adv_tx_desc *) tz->addr; /* Allocate software ring */ txq->sw_ring = rte_zmalloc("txq->sw_ring", sizeof(struct igb_tx_entry) * nb_desc, RTE_CACHE_LINE_SIZE); if (txq->sw_ring == NULL) { igb_tx_queue_release(txq); return (-ENOMEM); } PMD_INIT_LOG(DEBUG, "sw_ring=%p hw_ring=%p dma_addr=0x%"PRIx64, txq->sw_ring, txq->tx_ring, txq->tx_ring_phys_addr); igb_reset_tx_queue(txq, dev); dev->tx_pkt_burst = eth_igb_xmit_pkts; dev->data->tx_queues[queue_idx] = txq; return (0); } static void igb_rx_queue_release_mbufs(struct igb_rx_queue *rxq) { unsigned i; if (rxq->sw_ring != NULL) { for (i = 0; i < rxq->nb_rx_desc; i++) { if (rxq->sw_ring[i].mbuf != NULL) { rte_pktmbuf_free_seg(rxq->sw_ring[i].mbuf); rxq->sw_ring[i].mbuf = NULL; } } } } static void igb_rx_queue_release(struct igb_rx_queue *rxq) { if (rxq != NULL) { igb_rx_queue_release_mbufs(rxq); rte_free(rxq->sw_ring); rte_free(rxq); } } void eth_igb_rx_queue_release(void *rxq) { igb_rx_queue_release(rxq); } static void igb_reset_rx_queue(struct igb_rx_queue *rxq) { static const union e1000_adv_rx_desc zeroed_desc = { .read = { .pkt_addr = 0}}; unsigned i; /* Zero out HW ring memory */ for (i = 0; i < rxq->nb_rx_desc; i++) { rxq->rx_ring[i] = zeroed_desc; } rxq->rx_tail = 0; rxq->pkt_first_seg = NULL; rxq->pkt_last_seg = NULL; } int eth_igb_rx_queue_setup(struct rte_eth_dev *dev, uint16_t queue_idx, uint16_t nb_desc, unsigned int socket_id, const struct rte_eth_rxconf *rx_conf, struct rte_mempool *mp) { const struct rte_memzone *rz; struct igb_rx_queue *rxq; struct e1000_hw *hw; unsigned int size; hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private); /* * Validate number of receive descriptors. * It must not exceed hardware maximum, and must be multiple * of IGB_ALIGN. */ if (((nb_desc * sizeof(union e1000_adv_rx_desc)) % IGB_ALIGN) != 0 || (nb_desc > IGB_MAX_RING_DESC) || (nb_desc < IGB_MIN_RING_DESC)) { return (-EINVAL); } /* Free memory prior to re-allocation if needed */ if (dev->data->rx_queues[queue_idx] != NULL) { igb_rx_queue_release(dev->data->rx_queues[queue_idx]); dev->data->rx_queues[queue_idx] = NULL; } /* First allocate the RX queue data structure. */ rxq = rte_zmalloc("ethdev RX queue", sizeof(struct igb_rx_queue), RTE_CACHE_LINE_SIZE); if (rxq == NULL) return (-ENOMEM); rxq->mb_pool = mp; rxq->nb_rx_desc = nb_desc; rxq->pthresh = rx_conf->rx_thresh.pthresh; rxq->hthresh = rx_conf->rx_thresh.hthresh; rxq->wthresh = rx_conf->rx_thresh.wthresh; if (rxq->wthresh > 0 && hw->mac.type == e1000_82576) rxq->wthresh = 1; rxq->drop_en = rx_conf->rx_drop_en; rxq->rx_free_thresh = rx_conf->rx_free_thresh; rxq->queue_id = queue_idx; rxq->reg_idx = (uint16_t)((RTE_ETH_DEV_SRIOV(dev).active == 0) ? queue_idx : RTE_ETH_DEV_SRIOV(dev).def_pool_q_idx + queue_idx); rxq->port_id = dev->data->port_id; rxq->crc_len = (uint8_t) ((dev->data->dev_conf.rxmode.hw_strip_crc) ? 0 : ETHER_CRC_LEN); /* * Allocate RX ring hardware descriptors. A memzone large enough to * handle the maximum ring size is allocated in order to allow for * resizing in later calls to the queue setup function. */ size = sizeof(union e1000_adv_rx_desc) * IGB_MAX_RING_DESC; rz = ring_dma_zone_reserve(dev, "rx_ring", queue_idx, size, socket_id); if (rz == NULL) { igb_rx_queue_release(rxq); return (-ENOMEM); } rxq->rdt_reg_addr = E1000_PCI_REG_ADDR(hw, E1000_RDT(rxq->reg_idx)); rxq->rdh_reg_addr = E1000_PCI_REG_ADDR(hw, E1000_RDH(rxq->reg_idx)); #ifndef RTE_LIBRTE_XEN_DOM0 rxq->rx_ring_phys_addr = (uint64_t) rz->phys_addr; #else rxq->rx_ring_phys_addr = rte_mem_phy2mch(rz->memseg_id, rz->phys_addr); #endif rxq->rx_ring = (union e1000_adv_rx_desc *) rz->addr; /* Allocate software ring. */ rxq->sw_ring = rte_zmalloc("rxq->sw_ring", sizeof(struct igb_rx_entry) * nb_desc, RTE_CACHE_LINE_SIZE); if (rxq->sw_ring == NULL) { igb_rx_queue_release(rxq); return (-ENOMEM); } PMD_INIT_LOG(DEBUG, "sw_ring=%p hw_ring=%p dma_addr=0x%"PRIx64, rxq->sw_ring, rxq->rx_ring, rxq->rx_ring_phys_addr); dev->data->rx_queues[queue_idx] = rxq; igb_reset_rx_queue(rxq); return 0; } uint32_t eth_igb_rx_queue_count(struct rte_eth_dev *dev, uint16_t rx_queue_id) { #define IGB_RXQ_SCAN_INTERVAL 4 volatile union e1000_adv_rx_desc *rxdp; struct igb_rx_queue *rxq; uint32_t desc = 0; if (rx_queue_id >= dev->data->nb_rx_queues) { PMD_RX_LOG(ERR, "Invalid RX queue id=%d", rx_queue_id); return 0; } rxq = dev->data->rx_queues[rx_queue_id]; rxdp = &(rxq->rx_ring[rxq->rx_tail]); while ((desc < rxq->nb_rx_desc) && (rxdp->wb.upper.status_error & E1000_RXD_STAT_DD)) { desc += IGB_RXQ_SCAN_INTERVAL; rxdp += IGB_RXQ_SCAN_INTERVAL; if (rxq->rx_tail + desc >= rxq->nb_rx_desc) rxdp = &(rxq->rx_ring[rxq->rx_tail + desc - rxq->nb_rx_desc]); } return 0; } int eth_igb_rx_descriptor_done(void *rx_queue, uint16_t offset) { volatile union e1000_adv_rx_desc *rxdp; struct igb_rx_queue *rxq = rx_queue; uint32_t desc; if (unlikely(offset >= rxq->nb_rx_desc)) return 0; desc = rxq->rx_tail + offset; if (desc >= rxq->nb_rx_desc) desc -= rxq->nb_rx_desc; rxdp = &rxq->rx_ring[desc]; return !!(rxdp->wb.upper.status_error & E1000_RXD_STAT_DD); } void igb_dev_clear_queues(struct rte_eth_dev *dev) { uint16_t i; struct igb_tx_queue *txq; struct igb_rx_queue *rxq; for (i = 0; i < dev->data->nb_tx_queues; i++) { txq = dev->data->tx_queues[i]; if (txq != NULL) { igb_tx_queue_release_mbufs(txq); igb_reset_tx_queue(txq, dev); } } for (i = 0; i < dev->data->nb_rx_queues; i++) { rxq = dev->data->rx_queues[i]; if (rxq != NULL) { igb_rx_queue_release_mbufs(rxq); igb_reset_rx_queue(rxq); } } } /** * Receive Side Scaling (RSS). * See section 7.1.1.7 in the following document: * "Intel 82576 GbE Controller Datasheet" - Revision 2.45 October 2009 * * Principles: * The source and destination IP addresses of the IP header and the source and * destination ports of TCP/UDP headers, if any, of received packets are hashed * against a configurable random key to compute a 32-bit RSS hash result. * The seven (7) LSBs of the 32-bit hash result are used as an index into a * 128-entry redirection table (RETA). Each entry of the RETA provides a 3-bit * RSS output index which is used as the RX queue index where to store the * received packets. * The following output is supplied in the RX write-back descriptor: * - 32-bit result of the Microsoft RSS hash function, * - 4-bit RSS type field. */ /* * RSS random key supplied in section 7.1.1.7.3 of the Intel 82576 datasheet. * Used as the default key. */ static uint8_t rss_intel_key[40] = { 0x6D, 0x5A, 0x56, 0xDA, 0x25, 0x5B, 0x0E, 0xC2, 0x41, 0x67, 0x25, 0x3D, 0x43, 0xA3, 0x8F, 0xB0, 0xD0, 0xCA, 0x2B, 0xCB, 0xAE, 0x7B, 0x30, 0xB4, 0x77, 0xCB, 0x2D, 0xA3, 0x80, 0x30, 0xF2, 0x0C, 0x6A, 0x42, 0xB7, 0x3B, 0xBE, 0xAC, 0x01, 0xFA, }; static void igb_rss_disable(struct rte_eth_dev *dev) { struct e1000_hw *hw; uint32_t mrqc; hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private); mrqc = E1000_READ_REG(hw, E1000_MRQC); mrqc &= ~E1000_MRQC_ENABLE_MASK; E1000_WRITE_REG(hw, E1000_MRQC, mrqc); } static void igb_hw_rss_hash_set(struct e1000_hw *hw, struct rte_eth_rss_conf *rss_conf) { uint8_t *hash_key; uint32_t rss_key; uint32_t mrqc; uint64_t rss_hf; uint16_t i; hash_key = rss_conf->rss_key; if (hash_key != NULL) { /* Fill in RSS hash key */ for (i = 0; i < 10; i++) { rss_key = hash_key[(i * 4)]; rss_key |= hash_key[(i * 4) + 1] << 8; rss_key |= hash_key[(i * 4) + 2] << 16; rss_key |= hash_key[(i * 4) + 3] << 24; E1000_WRITE_REG_ARRAY(hw, E1000_RSSRK(0), i, rss_key); } } /* Set configured hashing protocols in MRQC register */ rss_hf = rss_conf->rss_hf; mrqc = E1000_MRQC_ENABLE_RSS_4Q; /* RSS enabled. */ if (rss_hf & ETH_RSS_IPV4) mrqc |= E1000_MRQC_RSS_FIELD_IPV4; if (rss_hf & ETH_RSS_IPV4_TCP) mrqc |= E1000_MRQC_RSS_FIELD_IPV4_TCP; if (rss_hf & ETH_RSS_IPV6) mrqc |= E1000_MRQC_RSS_FIELD_IPV6; if (rss_hf & ETH_RSS_IPV6_EX) mrqc |= E1000_MRQC_RSS_FIELD_IPV6_EX; if (rss_hf & ETH_RSS_IPV6_TCP) mrqc |= E1000_MRQC_RSS_FIELD_IPV6_TCP; if (rss_hf & ETH_RSS_IPV6_TCP_EX) mrqc |= E1000_MRQC_RSS_FIELD_IPV6_TCP_EX; if (rss_hf & ETH_RSS_IPV4_UDP) mrqc |= E1000_MRQC_RSS_FIELD_IPV4_UDP; if (rss_hf & ETH_RSS_IPV6_UDP) mrqc |= E1000_MRQC_RSS_FIELD_IPV6_UDP; if (rss_hf & ETH_RSS_IPV6_UDP_EX) mrqc |= E1000_MRQC_RSS_FIELD_IPV6_UDP_EX; E1000_WRITE_REG(hw, E1000_MRQC, mrqc); } int eth_igb_rss_hash_update(struct rte_eth_dev *dev, struct rte_eth_rss_conf *rss_conf) { struct e1000_hw *hw; uint32_t mrqc; uint64_t rss_hf; hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private); /* * Before changing anything, first check that the update RSS operation * does not attempt to disable RSS, if RSS was enabled at * initialization time, or does not attempt to enable RSS, if RSS was * disabled at initialization time. */ rss_hf = rss_conf->rss_hf & IGB_RSS_OFFLOAD_ALL; mrqc = E1000_READ_REG(hw, E1000_MRQC); if (!(mrqc & E1000_MRQC_ENABLE_MASK)) { /* RSS disabled */ if (rss_hf != 0) /* Enable RSS */ return -(EINVAL); return 0; /* Nothing to do */ } /* RSS enabled */ if (rss_hf == 0) /* Disable RSS */ return -(EINVAL); igb_hw_rss_hash_set(hw, rss_conf); return 0; } int eth_igb_rss_hash_conf_get(struct rte_eth_dev *dev, struct rte_eth_rss_conf *rss_conf) { struct e1000_hw *hw; uint8_t *hash_key; uint32_t rss_key; uint32_t mrqc; uint64_t rss_hf; uint16_t i; hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private); hash_key = rss_conf->rss_key; if (hash_key != NULL) { /* Return RSS hash key */ for (i = 0; i < 10; i++) { rss_key = E1000_READ_REG_ARRAY(hw, E1000_RSSRK(0), i); hash_key[(i * 4)] = rss_key & 0x000000FF; hash_key[(i * 4) + 1] = (rss_key >> 8) & 0x000000FF; hash_key[(i * 4) + 2] = (rss_key >> 16) & 0x000000FF; hash_key[(i * 4) + 3] = (rss_key >> 24) & 0x000000FF; } } /* Get RSS functions configured in MRQC register */ mrqc = E1000_READ_REG(hw, E1000_MRQC); if ((mrqc & E1000_MRQC_ENABLE_RSS_4Q) == 0) { /* RSS is disabled */ rss_conf->rss_hf = 0; return 0; } rss_hf = 0; if (mrqc & E1000_MRQC_RSS_FIELD_IPV4) rss_hf |= ETH_RSS_IPV4; if (mrqc & E1000_MRQC_RSS_FIELD_IPV4_TCP) rss_hf |= ETH_RSS_IPV4_TCP; if (mrqc & E1000_MRQC_RSS_FIELD_IPV6) rss_hf |= ETH_RSS_IPV6; if (mrqc & E1000_MRQC_RSS_FIELD_IPV6_EX) rss_hf |= ETH_RSS_IPV6_EX; if (mrqc & E1000_MRQC_RSS_FIELD_IPV6_TCP) rss_hf |= ETH_RSS_IPV6_TCP; if (mrqc & E1000_MRQC_RSS_FIELD_IPV6_TCP_EX) rss_hf |= ETH_RSS_IPV6_TCP_EX; if (mrqc & E1000_MRQC_RSS_FIELD_IPV4_UDP) rss_hf |= ETH_RSS_IPV4_UDP; if (mrqc & E1000_MRQC_RSS_FIELD_IPV6_UDP) rss_hf |= ETH_RSS_IPV6_UDP; if (mrqc & E1000_MRQC_RSS_FIELD_IPV6_UDP_EX) rss_hf |= ETH_RSS_IPV6_UDP_EX; rss_conf->rss_hf = rss_hf; return 0; } static void igb_rss_configure(struct rte_eth_dev *dev) { struct rte_eth_rss_conf rss_conf; struct e1000_hw *hw; uint32_t shift; uint16_t i; hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private); /* Fill in redirection table. */ shift = (hw->mac.type == e1000_82575) ? 6 : 0; for (i = 0; i < 128; i++) { union e1000_reta { uint32_t dword; uint8_t bytes[4]; } reta; uint8_t q_idx; q_idx = (uint8_t) ((dev->data->nb_rx_queues > 1) ? i % dev->data->nb_rx_queues : 0); reta.bytes[i & 3] = (uint8_t) (q_idx << shift); if ((i & 3) == 3) E1000_WRITE_REG(hw, E1000_RETA(i >> 2), reta.dword); } /* * Configure the RSS key and the RSS protocols used to compute * the RSS hash of input packets. */ rss_conf = dev->data->dev_conf.rx_adv_conf.rss_conf; if ((rss_conf.rss_hf & IGB_RSS_OFFLOAD_ALL) == 0) { igb_rss_disable(dev); return; } if (rss_conf.rss_key == NULL) rss_conf.rss_key = rss_intel_key; /* Default hash key */ igb_hw_rss_hash_set(hw, &rss_conf); } /* * Check if the mac type support VMDq or not. * Return 1 if it supports, otherwise, return 0. */ static int igb_is_vmdq_supported(const struct rte_eth_dev *dev) { const struct e1000_hw *hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private); switch (hw->mac.type) { case e1000_82576: case e1000_82580: case e1000_i350: return 1; case e1000_82540: case e1000_82541: case e1000_82542: case e1000_82543: case e1000_82544: case e1000_82545: case e1000_82546: case e1000_82547: case e1000_82571: case e1000_82572: case e1000_82573: case e1000_82574: case e1000_82583: case e1000_i210: case e1000_i211: default: PMD_INIT_LOG(ERR, "Cannot support VMDq feature"); return 0; } } static int igb_vmdq_rx_hw_configure(struct rte_eth_dev *dev) { struct rte_eth_vmdq_rx_conf *cfg; struct e1000_hw *hw; uint32_t mrqc, vt_ctl, vmolr, rctl; int i; PMD_INIT_FUNC_TRACE(); hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private); cfg = &dev->data->dev_conf.rx_adv_conf.vmdq_rx_conf; /* Check if mac type can support VMDq, return value of 0 means NOT support */ if (igb_is_vmdq_supported(dev) == 0) return -1; igb_rss_disable(dev); /* RCTL: eanble VLAN filter */ rctl = E1000_READ_REG(hw, E1000_RCTL); rctl |= E1000_RCTL_VFE; E1000_WRITE_REG(hw, E1000_RCTL, rctl); /* MRQC: enable vmdq */ mrqc = E1000_READ_REG(hw, E1000_MRQC); mrqc |= E1000_MRQC_ENABLE_VMDQ; E1000_WRITE_REG(hw, E1000_MRQC, mrqc); /* VTCTL: pool selection according to VLAN tag */ vt_ctl = E1000_READ_REG(hw, E1000_VT_CTL); if (cfg->enable_default_pool) vt_ctl |= (cfg->default_pool << E1000_VT_CTL_DEFAULT_POOL_SHIFT); vt_ctl |= E1000_VT_CTL_IGNORE_MAC; E1000_WRITE_REG(hw, E1000_VT_CTL, vt_ctl); for (i = 0; i < E1000_VMOLR_SIZE; i++) { vmolr = E1000_READ_REG(hw, E1000_VMOLR(i)); vmolr &= ~(E1000_VMOLR_AUPE | E1000_VMOLR_ROMPE | E1000_VMOLR_ROPE | E1000_VMOLR_BAM | E1000_VMOLR_MPME); if (cfg->rx_mode & ETH_VMDQ_ACCEPT_UNTAG) vmolr |= E1000_VMOLR_AUPE; if (cfg->rx_mode & ETH_VMDQ_ACCEPT_HASH_MC) vmolr |= E1000_VMOLR_ROMPE; if (cfg->rx_mode & ETH_VMDQ_ACCEPT_HASH_UC) vmolr |= E1000_VMOLR_ROPE; if (cfg->rx_mode & ETH_VMDQ_ACCEPT_BROADCAST) vmolr |= E1000_VMOLR_BAM; if (cfg->rx_mode & ETH_VMDQ_ACCEPT_MULTICAST) vmolr |= E1000_VMOLR_MPME; E1000_WRITE_REG(hw, E1000_VMOLR(i), vmolr); } /* * VMOLR: set STRVLAN as 1 if IGMAC in VTCTL is set as 1 * Both 82576 and 82580 support it */ if (hw->mac.type != e1000_i350) { for (i = 0; i < E1000_VMOLR_SIZE; i++) { vmolr = E1000_READ_REG(hw, E1000_VMOLR(i)); vmolr |= E1000_VMOLR_STRVLAN; E1000_WRITE_REG(hw, E1000_VMOLR(i), vmolr); } } /* VFTA - enable all vlan filters */ for (i = 0; i < IGB_VFTA_SIZE; i++) E1000_WRITE_REG(hw, (E1000_VFTA+(i*4)), UINT32_MAX); /* VFRE: 8 pools enabling for rx, both 82576 and i350 support it */ if (hw->mac.type != e1000_82580) E1000_WRITE_REG(hw, E1000_VFRE, E1000_MBVFICR_VFREQ_MASK); /* * RAH/RAL - allow pools to read specific mac addresses * In this case, all pools should be able to read from mac addr 0 */ E1000_WRITE_REG(hw, E1000_RAH(0), (E1000_RAH_AV | UINT16_MAX)); E1000_WRITE_REG(hw, E1000_RAL(0), UINT32_MAX); /* VLVF: set up filters for vlan tags as configured */ for (i = 0; i < cfg->nb_pool_maps; i++) { /* set vlan id in VF register and set the valid bit */ E1000_WRITE_REG(hw, E1000_VLVF(i), (E1000_VLVF_VLANID_ENABLE | \ (cfg->pool_map[i].vlan_id & ETH_VLAN_ID_MAX) | \ ((cfg->pool_map[i].pools << E1000_VLVF_POOLSEL_SHIFT ) & \ E1000_VLVF_POOLSEL_MASK))); } E1000_WRITE_FLUSH(hw); return 0; } /********************************************************************* * * Enable receive unit. * **********************************************************************/ static int igb_alloc_rx_queue_mbufs(struct igb_rx_queue *rxq) { struct igb_rx_entry *rxe = rxq->sw_ring; uint64_t dma_addr; unsigned i; /* Initialize software ring entries. */ for (i = 0; i < rxq->nb_rx_desc; i++) { volatile union e1000_adv_rx_desc *rxd; struct rte_mbuf *mbuf = rte_rxmbuf_alloc(rxq->mb_pool); if (mbuf == NULL) { PMD_INIT_LOG(ERR, "RX mbuf alloc failed " "queue_id=%hu", rxq->queue_id); return (-ENOMEM); } dma_addr = rte_cpu_to_le_64(RTE_MBUF_DATA_DMA_ADDR_DEFAULT(mbuf)); rxd = &rxq->rx_ring[i]; rxd->read.hdr_addr = dma_addr; rxd->read.pkt_addr = dma_addr; rxe[i].mbuf = mbuf; } return 0; } #define E1000_MRQC_DEF_Q_SHIFT (3) static int igb_dev_mq_rx_configure(struct rte_eth_dev *dev) { struct e1000_hw *hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private); uint32_t mrqc; if (RTE_ETH_DEV_SRIOV(dev).active == ETH_8_POOLS) { /* * SRIOV active scheme * FIXME if support RSS together with VMDq & SRIOV */ mrqc = E1000_MRQC_ENABLE_VMDQ; /* 011b Def_Q ignore, according to VT_CTL.DEF_PL */ mrqc |= 0x3 << E1000_MRQC_DEF_Q_SHIFT; E1000_WRITE_REG(hw, E1000_MRQC, mrqc); } else if(RTE_ETH_DEV_SRIOV(dev).active == 0) { /* * SRIOV inactive scheme */ switch (dev->data->dev_conf.rxmode.mq_mode) { case ETH_MQ_RX_RSS: igb_rss_configure(dev); break; case ETH_MQ_RX_VMDQ_ONLY: /*Configure general VMDQ only RX parameters*/ igb_vmdq_rx_hw_configure(dev); break; case ETH_MQ_RX_NONE: /* if mq_mode is none, disable rss mode.*/ default: igb_rss_disable(dev); break; } } return 0; } int eth_igb_rx_init(struct rte_eth_dev *dev) { struct e1000_hw *hw; struct igb_rx_queue *rxq; struct rte_pktmbuf_pool_private *mbp_priv; uint32_t rctl; uint32_t rxcsum; uint32_t srrctl; uint16_t buf_size; uint16_t rctl_bsize; uint16_t i; int ret; hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private); srrctl = 0; /* * Make sure receives are disabled while setting * up the descriptor ring. */ rctl = E1000_READ_REG(hw, E1000_RCTL); E1000_WRITE_REG(hw, E1000_RCTL, rctl & ~E1000_RCTL_EN); /* * Configure support of jumbo frames, if any. */ if (dev->data->dev_conf.rxmode.jumbo_frame == 1) { rctl |= E1000_RCTL_LPE; /* * Set maximum packet length by default, and might be updated * together with enabling/disabling dual VLAN. */ E1000_WRITE_REG(hw, E1000_RLPML, dev->data->dev_conf.rxmode.max_rx_pkt_len + VLAN_TAG_SIZE); } else rctl &= ~E1000_RCTL_LPE; /* Configure and enable each RX queue. */ rctl_bsize = 0; dev->rx_pkt_burst = eth_igb_recv_pkts; for (i = 0; i < dev->data->nb_rx_queues; i++) { uint64_t bus_addr; uint32_t rxdctl; rxq = dev->data->rx_queues[i]; /* Allocate buffers for descriptor rings and set up queue */ ret = igb_alloc_rx_queue_mbufs(rxq); if (ret) return ret; /* * Reset crc_len in case it was changed after queue setup by a * call to configure */ rxq->crc_len = (uint8_t)(dev->data->dev_conf.rxmode.hw_strip_crc ? 0 : ETHER_CRC_LEN); bus_addr = rxq->rx_ring_phys_addr; E1000_WRITE_REG(hw, E1000_RDLEN(rxq->reg_idx), rxq->nb_rx_desc * sizeof(union e1000_adv_rx_desc)); E1000_WRITE_REG(hw, E1000_RDBAH(rxq->reg_idx), (uint32_t)(bus_addr >> 32)); E1000_WRITE_REG(hw, E1000_RDBAL(rxq->reg_idx), (uint32_t)bus_addr); srrctl = E1000_SRRCTL_DESCTYPE_ADV_ONEBUF; /* * Configure RX buffer size. */ mbp_priv = rte_mempool_get_priv(rxq->mb_pool); buf_size = (uint16_t) (mbp_priv->mbuf_data_room_size - RTE_PKTMBUF_HEADROOM); if (buf_size >= 1024) { /* * Configure the BSIZEPACKET field of the SRRCTL * register of the queue. * Value is in 1 KB resolution, from 1 KB to 127 KB. * If this field is equal to 0b, then RCTL.BSIZE * determines the RX packet buffer size. */ srrctl |= ((buf_size >> E1000_SRRCTL_BSIZEPKT_SHIFT) & E1000_SRRCTL_BSIZEPKT_MASK); buf_size = (uint16_t) ((srrctl & E1000_SRRCTL_BSIZEPKT_MASK) << E1000_SRRCTL_BSIZEPKT_SHIFT); /* It adds dual VLAN length for supporting dual VLAN */ if ((dev->data->dev_conf.rxmode.max_rx_pkt_len + 2 * VLAN_TAG_SIZE) > buf_size){ if (!dev->data->scattered_rx) PMD_INIT_LOG(DEBUG, "forcing scatter mode"); dev->rx_pkt_burst = eth_igb_recv_scattered_pkts; dev->data->scattered_rx = 1; } } else { /* * Use BSIZE field of the device RCTL register. */ if ((rctl_bsize == 0) || (rctl_bsize > buf_size)) rctl_bsize = buf_size; if (!dev->data->scattered_rx) PMD_INIT_LOG(DEBUG, "forcing scatter mode"); dev->rx_pkt_burst = eth_igb_recv_scattered_pkts; dev->data->scattered_rx = 1; } /* Set if packets are dropped when no descriptors available */ if (rxq->drop_en) srrctl |= E1000_SRRCTL_DROP_EN; E1000_WRITE_REG(hw, E1000_SRRCTL(rxq->reg_idx), srrctl); /* Enable this RX queue. */ rxdctl = E1000_READ_REG(hw, E1000_RXDCTL(rxq->reg_idx)); rxdctl |= E1000_RXDCTL_QUEUE_ENABLE; rxdctl &= 0xFFF00000; rxdctl |= (rxq->pthresh & 0x1F); rxdctl |= ((rxq->hthresh & 0x1F) << 8); rxdctl |= ((rxq->wthresh & 0x1F) << 16); E1000_WRITE_REG(hw, E1000_RXDCTL(rxq->reg_idx), rxdctl); } if (dev->data->dev_conf.rxmode.enable_scatter) { if (!dev->data->scattered_rx) PMD_INIT_LOG(DEBUG, "forcing scatter mode"); dev->rx_pkt_burst = eth_igb_recv_scattered_pkts; dev->data->scattered_rx = 1; } /* * Setup BSIZE field of RCTL register, if needed. * Buffer sizes >= 1024 are not [supposed to be] setup in the RCTL * register, since the code above configures the SRRCTL register of * the RX queue in such a case. * All configurable sizes are: * 16384: rctl |= (E1000_RCTL_SZ_16384 | E1000_RCTL_BSEX); * 8192: rctl |= (E1000_RCTL_SZ_8192 | E1000_RCTL_BSEX); * 4096: rctl |= (E1000_RCTL_SZ_4096 | E1000_RCTL_BSEX); * 2048: rctl |= E1000_RCTL_SZ_2048; * 1024: rctl |= E1000_RCTL_SZ_1024; * 512: rctl |= E1000_RCTL_SZ_512; * 256: rctl |= E1000_RCTL_SZ_256; */ if (rctl_bsize > 0) { if (rctl_bsize >= 512) /* 512 <= buf_size < 1024 - use 512 */ rctl |= E1000_RCTL_SZ_512; else /* 256 <= buf_size < 512 - use 256 */ rctl |= E1000_RCTL_SZ_256; } /* * Configure RSS if device configured with multiple RX queues. */ igb_dev_mq_rx_configure(dev); /* Update the rctl since igb_dev_mq_rx_configure may change its value */ rctl |= E1000_READ_REG(hw, E1000_RCTL); /* * Setup the Checksum Register. * Receive Full-Packet Checksum Offload is mutually exclusive with RSS. */ rxcsum = E1000_READ_REG(hw, E1000_RXCSUM); rxcsum |= E1000_RXCSUM_PCSD; /* Enable both L3/L4 rx checksum offload */ if (dev->data->dev_conf.rxmode.hw_ip_checksum) rxcsum |= (E1000_RXCSUM_IPOFL | E1000_RXCSUM_TUOFL); else rxcsum &= ~(E1000_RXCSUM_IPOFL | E1000_RXCSUM_TUOFL); E1000_WRITE_REG(hw, E1000_RXCSUM, rxcsum); /* Setup the Receive Control Register. */ if (dev->data->dev_conf.rxmode.hw_strip_crc) { rctl |= E1000_RCTL_SECRC; /* Strip Ethernet CRC. */ /* set STRCRC bit in all queues */ if (hw->mac.type == e1000_i350 || hw->mac.type == e1000_i210 || hw->mac.type == e1000_i211 || hw->mac.type == e1000_i354) { for (i = 0; i < dev->data->nb_rx_queues; i++) { rxq = dev->data->rx_queues[i]; uint32_t dvmolr = E1000_READ_REG(hw, E1000_DVMOLR(rxq->reg_idx)); dvmolr |= E1000_DVMOLR_STRCRC; E1000_WRITE_REG(hw, E1000_DVMOLR(rxq->reg_idx), dvmolr); } } } else { rctl &= ~E1000_RCTL_SECRC; /* Do not Strip Ethernet CRC. */ /* clear STRCRC bit in all queues */ if (hw->mac.type == e1000_i350 || hw->mac.type == e1000_i210 || hw->mac.type == e1000_i211 || hw->mac.type == e1000_i354) { for (i = 0; i < dev->data->nb_rx_queues; i++) { rxq = dev->data->rx_queues[i]; uint32_t dvmolr = E1000_READ_REG(hw, E1000_DVMOLR(rxq->reg_idx)); dvmolr &= ~E1000_DVMOLR_STRCRC; E1000_WRITE_REG(hw, E1000_DVMOLR(rxq->reg_idx), dvmolr); } } } rctl &= ~(3 << E1000_RCTL_MO_SHIFT); rctl |= E1000_RCTL_EN | E1000_RCTL_BAM | E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF | (hw->mac.mc_filter_type << E1000_RCTL_MO_SHIFT); /* Make sure VLAN Filters are off. */ if (dev->data->dev_conf.rxmode.mq_mode != ETH_MQ_RX_VMDQ_ONLY) rctl &= ~E1000_RCTL_VFE; /* Don't store bad packets. */ rctl &= ~E1000_RCTL_SBP; /* Enable Receives. */ E1000_WRITE_REG(hw, E1000_RCTL, rctl); /* * Setup the HW Rx Head and Tail Descriptor Pointers. * This needs to be done after enable. */ for (i = 0; i < dev->data->nb_rx_queues; i++) { rxq = dev->data->rx_queues[i]; E1000_WRITE_REG(hw, E1000_RDH(rxq->reg_idx), 0); E1000_WRITE_REG(hw, E1000_RDT(rxq->reg_idx), rxq->nb_rx_desc - 1); } return 0; } /********************************************************************* * * Enable transmit unit. * **********************************************************************/ void eth_igb_tx_init(struct rte_eth_dev *dev) { struct e1000_hw *hw; struct igb_tx_queue *txq; uint32_t tctl; uint32_t txdctl; uint16_t i; hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private); /* Setup the Base and Length of the Tx Descriptor Rings. */ for (i = 0; i < dev->data->nb_tx_queues; i++) { uint64_t bus_addr; txq = dev->data->tx_queues[i]; bus_addr = txq->tx_ring_phys_addr; E1000_WRITE_REG(hw, E1000_TDLEN(txq->reg_idx), txq->nb_tx_desc * sizeof(union e1000_adv_tx_desc)); E1000_WRITE_REG(hw, E1000_TDBAH(txq->reg_idx), (uint32_t)(bus_addr >> 32)); E1000_WRITE_REG(hw, E1000_TDBAL(txq->reg_idx), (uint32_t)bus_addr); /* Setup the HW Tx Head and Tail descriptor pointers. */ E1000_WRITE_REG(hw, E1000_TDT(txq->reg_idx), 0); E1000_WRITE_REG(hw, E1000_TDH(txq->reg_idx), 0); /* Setup Transmit threshold registers. */ txdctl = E1000_READ_REG(hw, E1000_TXDCTL(txq->reg_idx)); txdctl |= txq->pthresh & 0x1F; txdctl |= ((txq->hthresh & 0x1F) << 8); txdctl |= ((txq->wthresh & 0x1F) << 16); txdctl |= E1000_TXDCTL_QUEUE_ENABLE; E1000_WRITE_REG(hw, E1000_TXDCTL(txq->reg_idx), txdctl); } /* Program the Transmit Control Register. */ tctl = E1000_READ_REG(hw, E1000_TCTL); tctl &= ~E1000_TCTL_CT; tctl |= (E1000_TCTL_PSP | E1000_TCTL_RTLC | E1000_TCTL_EN | (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT)); e1000_config_collision_dist(hw); /* This write will effectively turn on the transmit unit. */ E1000_WRITE_REG(hw, E1000_TCTL, tctl); } /********************************************************************* * * Enable VF receive unit. * **********************************************************************/ int eth_igbvf_rx_init(struct rte_eth_dev *dev) { struct e1000_hw *hw; struct igb_rx_queue *rxq; struct rte_pktmbuf_pool_private *mbp_priv; uint32_t srrctl; uint16_t buf_size; uint16_t rctl_bsize; uint16_t i; int ret; hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private); /* setup MTU */ e1000_rlpml_set_vf(hw, (uint16_t)(dev->data->dev_conf.rxmode.max_rx_pkt_len + VLAN_TAG_SIZE)); /* Configure and enable each RX queue. */ rctl_bsize = 0; dev->rx_pkt_burst = eth_igb_recv_pkts; for (i = 0; i < dev->data->nb_rx_queues; i++) { uint64_t bus_addr; uint32_t rxdctl; rxq = dev->data->rx_queues[i]; /* Allocate buffers for descriptor rings and set up queue */ ret = igb_alloc_rx_queue_mbufs(rxq); if (ret) return ret; bus_addr = rxq->rx_ring_phys_addr; E1000_WRITE_REG(hw, E1000_RDLEN(i), rxq->nb_rx_desc * sizeof(union e1000_adv_rx_desc)); E1000_WRITE_REG(hw, E1000_RDBAH(i), (uint32_t)(bus_addr >> 32)); E1000_WRITE_REG(hw, E1000_RDBAL(i), (uint32_t)bus_addr); srrctl = E1000_SRRCTL_DESCTYPE_ADV_ONEBUF; /* * Configure RX buffer size. */ mbp_priv = rte_mempool_get_priv(rxq->mb_pool); buf_size = (uint16_t) (mbp_priv->mbuf_data_room_size - RTE_PKTMBUF_HEADROOM); if (buf_size >= 1024) { /* * Configure the BSIZEPACKET field of the SRRCTL * register of the queue. * Value is in 1 KB resolution, from 1 KB to 127 KB. * If this field is equal to 0b, then RCTL.BSIZE * determines the RX packet buffer size. */ srrctl |= ((buf_size >> E1000_SRRCTL_BSIZEPKT_SHIFT) & E1000_SRRCTL_BSIZEPKT_MASK); buf_size = (uint16_t) ((srrctl & E1000_SRRCTL_BSIZEPKT_MASK) << E1000_SRRCTL_BSIZEPKT_SHIFT); /* It adds dual VLAN length for supporting dual VLAN */ if ((dev->data->dev_conf.rxmode.max_rx_pkt_len + 2 * VLAN_TAG_SIZE) > buf_size){ if (!dev->data->scattered_rx) PMD_INIT_LOG(DEBUG, "forcing scatter mode"); dev->rx_pkt_burst = eth_igb_recv_scattered_pkts; dev->data->scattered_rx = 1; } } else { /* * Use BSIZE field of the device RCTL register. */ if ((rctl_bsize == 0) || (rctl_bsize > buf_size)) rctl_bsize = buf_size; if (!dev->data->scattered_rx) PMD_INIT_LOG(DEBUG, "forcing scatter mode"); dev->rx_pkt_burst = eth_igb_recv_scattered_pkts; dev->data->scattered_rx = 1; } /* Set if packets are dropped when no descriptors available */ if (rxq->drop_en) srrctl |= E1000_SRRCTL_DROP_EN; E1000_WRITE_REG(hw, E1000_SRRCTL(i), srrctl); /* Enable this RX queue. */ rxdctl = E1000_READ_REG(hw, E1000_RXDCTL(i)); rxdctl |= E1000_RXDCTL_QUEUE_ENABLE; rxdctl &= 0xFFF00000; rxdctl |= (rxq->pthresh & 0x1F); rxdctl |= ((rxq->hthresh & 0x1F) << 8); if (hw->mac.type == e1000_vfadapt) { /* * Workaround of 82576 VF Erratum * force set WTHRESH to 1 * to avoid Write-Back not triggered sometimes */ rxdctl |= 0x10000; PMD_INIT_LOG(DEBUG, "Force set RX WTHRESH to 1 !"); } else rxdctl |= ((rxq->wthresh & 0x1F) << 16); E1000_WRITE_REG(hw, E1000_RXDCTL(i), rxdctl); } if (dev->data->dev_conf.rxmode.enable_scatter) { if (!dev->data->scattered_rx) PMD_INIT_LOG(DEBUG, "forcing scatter mode"); dev->rx_pkt_burst = eth_igb_recv_scattered_pkts; dev->data->scattered_rx = 1; } /* * Setup the HW Rx Head and Tail Descriptor Pointers. * This needs to be done after enable. */ for (i = 0; i < dev->data->nb_rx_queues; i++) { rxq = dev->data->rx_queues[i]; E1000_WRITE_REG(hw, E1000_RDH(i), 0); E1000_WRITE_REG(hw, E1000_RDT(i), rxq->nb_rx_desc - 1); } return 0; } /********************************************************************* * * Enable VF transmit unit. * **********************************************************************/ void eth_igbvf_tx_init(struct rte_eth_dev *dev) { struct e1000_hw *hw; struct igb_tx_queue *txq; uint32_t txdctl; uint16_t i; hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private); /* Setup the Base and Length of the Tx Descriptor Rings. */ for (i = 0; i < dev->data->nb_tx_queues; i++) { uint64_t bus_addr; txq = dev->data->tx_queues[i]; bus_addr = txq->tx_ring_phys_addr; E1000_WRITE_REG(hw, E1000_TDLEN(i), txq->nb_tx_desc * sizeof(union e1000_adv_tx_desc)); E1000_WRITE_REG(hw, E1000_TDBAH(i), (uint32_t)(bus_addr >> 32)); E1000_WRITE_REG(hw, E1000_TDBAL(i), (uint32_t)bus_addr); /* Setup the HW Tx Head and Tail descriptor pointers. */ E1000_WRITE_REG(hw, E1000_TDT(i), 0); E1000_WRITE_REG(hw, E1000_TDH(i), 0); /* Setup Transmit threshold registers. */ txdctl = E1000_READ_REG(hw, E1000_TXDCTL(i)); txdctl |= txq->pthresh & 0x1F; txdctl |= ((txq->hthresh & 0x1F) << 8); if (hw->mac.type == e1000_82576) { /* * Workaround of 82576 VF Erratum * force set WTHRESH to 1 * to avoid Write-Back not triggered sometimes */ txdctl |= 0x10000; PMD_INIT_LOG(DEBUG, "Force set TX WTHRESH to 1 !"); } else txdctl |= ((txq->wthresh & 0x1F) << 16); txdctl |= E1000_TXDCTL_QUEUE_ENABLE; E1000_WRITE_REG(hw, E1000_TXDCTL(i), txdctl); } }