diff options
| -rw-r--r-- | drivers/net/ethernet/qlogic/qede/Makefile | 2 | ||||
| -rw-r--r-- | drivers/net/ethernet/qlogic/qede/qede.h | 11 | ||||
| -rw-r--r-- | drivers/net/ethernet/qlogic/qede/qede_fp.c | 1674 | ||||
| -rw-r--r-- | drivers/net/ethernet/qlogic/qede/qede_main.c | 1636 |
4 files changed, 1686 insertions, 1637 deletions
diff --git a/drivers/net/ethernet/qlogic/qede/Makefile b/drivers/net/ethernet/qlogic/qede/Makefile index 048a230c3ce0..c54922be50d1 100644 --- a/drivers/net/ethernet/qlogic/qede/Makefile +++ b/drivers/net/ethernet/qlogic/qede/Makefile @@ -1,5 +1,5 @@ obj-$(CONFIG_QEDE) := qede.o -qede-y := qede_main.o qede_ethtool.o +qede-y := qede_main.o qede_fp.o qede_ethtool.o qede-$(CONFIG_DCB) += qede_dcbnl.o qede-$(CONFIG_QED_RDMA) += qede_roce.o diff --git a/drivers/net/ethernet/qlogic/qede/qede.h b/drivers/net/ethernet/qlogic/qede/qede.h index b2c6cc997bc0..b4e419689000 100644 --- a/drivers/net/ethernet/qlogic/qede/qede.h +++ b/drivers/net/ethernet/qlogic/qede/qede.h @@ -408,6 +408,17 @@ struct qede_reload_args { } u; }; +/* Datapath functions definition */ +netdev_tx_t qede_start_xmit(struct sk_buff *skb, struct net_device *ndev); +netdev_features_t qede_features_check(struct sk_buff *skb, + struct net_device *dev, + netdev_features_t features); +void qede_tx_log_print(struct qede_dev *edev, struct qede_fastpath *fp); +int qede_alloc_rx_buffer(struct qede_rx_queue *rxq); +int qede_free_tx_pkt(struct qede_dev *edev, + struct qede_tx_queue *txq, int *len); +int qede_poll(struct napi_struct *napi, int budget); +irqreturn_t qede_msix_fp_int(int irq, void *fp_cookie); #ifdef CONFIG_DCB void qede_set_dcbnl_ops(struct net_device *ndev); #endif diff --git a/drivers/net/ethernet/qlogic/qede/qede_fp.c b/drivers/net/ethernet/qlogic/qede/qede_fp.c new file mode 100644 index 000000000000..1614eed2d65d --- /dev/null +++ b/drivers/net/ethernet/qlogic/qede/qede_fp.c @@ -0,0 +1,1674 @@ +/* QLogic qede NIC Driver + * Copyright (c) 2015-2017 QLogic Corporation + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * 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. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> +#include <net/udp_tunnel.h> +#include <linux/ip.h> +#include <net/ipv6.h> +#include <net/tcp.h> +#include <linux/if_ether.h> +#include <linux/if_vlan.h> +#include <net/ip6_checksum.h> + +#include <linux/qed/qed_if.h> +#include "qede.h" +/********************************* + * Content also used by slowpath * + *********************************/ + +int qede_alloc_rx_buffer(struct qede_rx_queue *rxq) +{ + struct sw_rx_data *sw_rx_data; + struct eth_rx_bd *rx_bd; + dma_addr_t mapping; + struct page *data; + + data = alloc_pages(GFP_ATOMIC, 0); + if (unlikely(!data)) + return -ENOMEM; + + /* Map the entire page as it would be used + * for multiple RX buffer segment size mapping. + */ + mapping = dma_map_page(rxq->dev, data, 0, + PAGE_SIZE, rxq->data_direction); + if (unlikely(dma_mapping_error(rxq->dev, mapping))) { + __free_page(data); + return -ENOMEM; + } + + sw_rx_data = &rxq->sw_rx_ring[rxq->sw_rx_prod & NUM_RX_BDS_MAX]; + sw_rx_data->page_offset = 0; + sw_rx_data->data = data; + sw_rx_data->mapping = mapping; + + /* Advance PROD and get BD pointer */ + rx_bd = (struct eth_rx_bd *)qed_chain_produce(&rxq->rx_bd_ring); + WARN_ON(!rx_bd); + rx_bd->addr.hi = cpu_to_le32(upper_32_bits(mapping)); + rx_bd->addr.lo = cpu_to_le32(lower_32_bits(mapping)); + + rxq->sw_rx_prod++; + + return 0; +} + +/* Unmap the data and free skb */ +int qede_free_tx_pkt(struct qede_dev *edev, struct qede_tx_queue *txq, int *len) +{ + u16 idx = txq->sw_tx_cons & NUM_TX_BDS_MAX; + struct sk_buff *skb = txq->sw_tx_ring.skbs[idx].skb; + struct eth_tx_1st_bd *first_bd; + struct eth_tx_bd *tx_data_bd; + int bds_consumed = 0; + int nbds; + bool data_split = txq->sw_tx_ring.skbs[idx].flags & QEDE_TSO_SPLIT_BD; + int i, split_bd_len = 0; + + if (unlikely(!skb)) { + DP_ERR(edev, + "skb is null for txq idx=%d txq->sw_tx_cons=%d txq->sw_tx_prod=%d\n", + idx, txq->sw_tx_cons, txq->sw_tx_prod); + return -1; + } + + *len = skb->len; + + first_bd = (struct eth_tx_1st_bd *)qed_chain_consume(&txq->tx_pbl); + + bds_consumed++; + + nbds = first_bd->data.nbds; + + if (data_split) { + struct eth_tx_bd *split = (struct eth_tx_bd *) + qed_chain_consume(&txq->tx_pbl); + split_bd_len = BD_UNMAP_LEN(split); + bds_consumed++; + } + dma_unmap_single(&edev->pdev->dev, BD_UNMAP_ADDR(first_bd), + BD_UNMAP_LEN(first_bd) + split_bd_len, DMA_TO_DEVICE); + + /* Unmap the data of the skb frags */ + for (i = 0; i < skb_shinfo(skb)->nr_frags; i++, bds_consumed++) { + tx_data_bd = (struct eth_tx_bd *) + qed_chain_consume(&txq->tx_pbl); + dma_unmap_page(&edev->pdev->dev, BD_UNMAP_ADDR(tx_data_bd), + BD_UNMAP_LEN(tx_data_bd), DMA_TO_DEVICE); + } + + while (bds_consumed++ < nbds) + qed_chain_consume(&txq->tx_pbl); + + /* Free skb */ + dev_kfree_skb_any(skb); + txq->sw_tx_ring.skbs[idx].skb = NULL; + txq->sw_tx_ring.skbs[idx].flags = 0; + + return 0; +} + +/* Unmap the data and free skb when mapping failed during start_xmit */ +static void qede_free_failed_tx_pkt(struct qede_tx_queue *txq, + struct eth_tx_1st_bd *first_bd, + int nbd, bool data_split) +{ + u16 idx = txq->sw_tx_prod & NUM_TX_BDS_MAX; + struct sk_buff *skb = txq->sw_tx_ring.skbs[idx].skb; + struct eth_tx_bd *tx_data_bd; + int i, split_bd_len = 0; + + /* Return prod to its position before this skb was handled */ + qed_chain_set_prod(&txq->tx_pbl, + le16_to_cpu(txq->tx_db.data.bd_prod), first_bd); + + first_bd = (struct eth_tx_1st_bd *)qed_chain_produce(&txq->tx_pbl); + + if (data_split) { + struct eth_tx_bd *split = (struct eth_tx_bd *) + qed_chain_produce(&txq->tx_pbl); + split_bd_len = BD_UNMAP_LEN(split); + nbd--; + } + + dma_unmap_single(txq->dev, BD_UNMAP_ADDR(first_bd), + BD_UNMAP_LEN(first_bd) + split_bd_len, DMA_TO_DEVICE); + + /* Unmap the data of the skb frags */ + for (i = 0; i < nbd; i++) { + tx_data_bd = (struct eth_tx_bd *) + qed_chain_produce(&txq->tx_pbl); + if (tx_data_bd->nbytes) + dma_unmap_page(txq->dev, + BD_UNMAP_ADDR(tx_data_bd), + BD_UNMAP_LEN(tx_data_bd), DMA_TO_DEVICE); + } + + /* Return again prod to its position before this skb was handled */ + qed_chain_set_prod(&txq->tx_pbl, + le16_to_cpu(txq->tx_db.data.bd_prod), first_bd); + + /* Free skb */ + dev_kfree_skb_any(skb); + txq->sw_tx_ring.skbs[idx].skb = NULL; + txq->sw_tx_ring.skbs[idx].flags = 0; +} + +static u32 qede_xmit_type(struct sk_buff *skb, int *ipv6_ext) +{ + u32 rc = XMIT_L4_CSUM; + __be16 l3_proto; + + if (skb->ip_summed != CHECKSUM_PARTIAL) + return XMIT_PLAIN; + + l3_proto = vlan_get_protocol(skb); + if (l3_proto == htons(ETH_P_IPV6) && + (ipv6_hdr(skb)->nexthdr == NEXTHDR_IPV6)) + *ipv6_ext = 1; + + if (skb->encapsulation) { + rc |= XMIT_ENC; + if (skb_is_gso(skb)) { + unsigned short gso_type = skb_shinfo(skb)->gso_type; + + if ((gso_type & SKB_GSO_UDP_TUNNEL_CSUM) || + (gso_type & SKB_GSO_GRE_CSUM)) + rc |= XMIT_ENC_GSO_L4_CSUM; + + rc |= XMIT_LSO; + return rc; + } + } + + if (skb_is_gso(skb)) + rc |= XMIT_LSO; + + return rc; +} + +static void qede_set_params_for_ipv6_ext(struct sk_buff *skb, + struct eth_tx_2nd_bd *second_bd, + struct eth_tx_3rd_bd *third_bd) +{ + u8 l4_proto; + u16 bd2_bits1 = 0, bd2_bits2 = 0; + + bd2_bits1 |= (1 << ETH_TX_DATA_2ND_BD_IPV6_EXT_SHIFT); + + bd2_bits2 |= ((((u8 *)skb_transport_header(skb) - skb->data) >> 1) & + ETH_TX_DATA_2ND_BD_L4_HDR_START_OFFSET_W_MASK) + << ETH_TX_DATA_2ND_BD_L4_HDR_START_OFFSET_W_SHIFT; + + bd2_bits1 |= (ETH_L4_PSEUDO_CSUM_CORRECT_LENGTH << + ETH_TX_DATA_2ND_BD_L4_PSEUDO_CSUM_MODE_SHIFT); + + if (vlan_get_protocol(skb) == htons(ETH_P_IPV6)) + l4_proto = ipv6_hdr(skb)->nexthdr; + else + l4_proto = ip_hdr(skb)->protocol; + + if (l4_proto == IPPROTO_UDP) + bd2_bits1 |= 1 << ETH_TX_DATA_2ND_BD_L4_UDP_SHIFT; + + if (third_bd) + third_bd->data.bitfields |= + cpu_to_le16(((tcp_hdrlen(skb) / 4) & + ETH_TX_DATA_3RD_BD_TCP_HDR_LEN_DW_MASK) << + ETH_TX_DATA_3RD_BD_TCP_HDR_LEN_DW_SHIFT); + + second_bd->data.bitfields1 = cpu_to_le16(bd2_bits1); + second_bd->data.bitfields2 = cpu_to_le16(bd2_bits2); +} + +static int map_frag_to_bd(struct qede_tx_queue *txq, + skb_frag_t *frag, struct eth_tx_bd *bd) +{ + dma_addr_t mapping; + + /* Map skb non-linear frag data for DMA */ + mapping = skb_frag_dma_map(txq->dev, frag, 0, + skb_frag_size(frag), DMA_TO_DEVICE); + if (unlikely(dma_mapping_error(txq->dev, mapping))) + return -ENOMEM; + + /* Setup the data pointer of the frag data */ + BD_SET_UNMAP_ADDR_LEN(bd, mapping, skb_frag_size(frag)); + + return 0; +} + +static u16 qede_get_skb_hlen(struct sk_buff *skb, bool is_encap_pkt) +{ + if (is_encap_pkt) + return (skb_inner_transport_header(skb) + + inner_tcp_hdrlen(skb) - skb->data); + else + return (skb_transport_header(skb) + + tcp_hdrlen(skb) - skb->data); +} + +/* +2 for 1st BD for headers and 2nd BD for headlen (if required) */ +#if ((MAX_SKB_FRAGS + 2) > ETH_TX_MAX_BDS_PER_NON_LSO_PACKET) +static bool qede_pkt_req_lin(struct sk_buff *skb, u8 xmit_type) +{ + int allowed_frags = ETH_TX_MAX_BDS_PER_NON_LSO_PACKET - 1; + + if (xmit_type & XMIT_LSO) { + int hlen; + + hlen = qede_get_skb_hlen(skb, xmit_type & XMIT_ENC); + + /* linear payload would require its own BD */ + if (skb_headlen(skb) > hlen) + allowed_frags--; + } + + return (skb_shinfo(skb)->nr_frags > allowed_frags); +} +#endif + +static inline void qede_update_tx_producer(struct qede_tx_queue *txq) +{ + /* wmb makes sure that the BDs data is updated before updating the + * producer, otherwise FW may read old data from the BDs. + */ + wmb(); + barrier(); + writel(txq->tx_db.raw, txq->doorbell_addr); + + /* mmiowb is needed to synchronize doorbell writes from more than one + * processor. It guarantees that the write arrives to the device before + * the queue lock is released and another start_xmit is called (possibly + * on another CPU). Without this barrier, the next doorbell can bypass + * this doorbell. This is applicable to IA64/Altix systems. + */ + mmiowb(); +} + +static int qede_xdp_xmit(struct qede_dev *edev, struct qede_fastpath *fp, + struct sw_rx_data *metadata, u16 padding, u16 length) +{ + struct qede_tx_queue *txq = fp->xdp_tx; + u16 idx = txq->sw_tx_prod & NUM_TX_BDS_MAX; + struct eth_tx_1st_bd *first_bd; + + if (!qed_chain_get_elem_left(&txq->tx_pbl)) { + txq->stopped_cnt++; + return -ENOMEM; + } + + first_bd = (struct eth_tx_1st_bd *)qed_chain_produce(&txq->tx_pbl); + + memset(first_bd, 0, sizeof(*first_bd)); + first_bd->data.bd_flags.bitfields = + BIT(ETH_TX_1ST_BD_FLAGS_START_BD_SHIFT); + first_bd->data.bitfields |= + (length & ETH_TX_DATA_1ST_BD_PKT_LEN_MASK) << + ETH_TX_DATA_1ST_BD_PKT_LEN_SHIFT; + first_bd->data.nbds = 1; + + /* We can safely ignore the offset, as it's 0 for XDP */ + BD_SET_UNMAP_ADDR_LEN(first_bd, metadata->mapping + padding, length); + + /* Synchronize the buffer back to device, as program [probably] + * has changed it. + */ + dma_sync_single_for_device(&edev->pdev->dev, + metadata->mapping + padding, + length, PCI_DMA_TODEVICE); + + txq->sw_tx_ring.pages[idx] = metadata->data; + txq->sw_tx_prod++; + + /* Mark the fastpath for future XDP doorbell */ + fp->xdp_xmit = 1; + + return 0; +} + +int qede_txq_has_work(struct qede_tx_queue *txq) +{ + u16 hw_bd_cons; + + /* Tell compiler that consumer and producer can change */ + barrier(); + hw_bd_cons = le16_to_cpu(*txq->hw_cons_ptr); + if (qed_chain_get_cons_idx(&txq->tx_pbl) == hw_bd_cons + 1) + return 0; + + return hw_bd_cons != qed_chain_get_cons_idx(&txq->tx_pbl); +} + +static void qede_xdp_tx_int(struct qede_dev *edev, struct qede_tx_queue *txq) +{ + struct eth_tx_1st_bd *bd; + u16 hw_bd_cons; + + hw_bd_cons = le16_to_cpu(*txq->hw_cons_ptr); + barrier(); + + while (hw_bd_cons != qed_chain_get_cons_idx(&txq->tx_pbl)) { + bd = (struct eth_tx_1st_bd *)qed_chain_consume(&txq->tx_pbl); + + dma_unmap_single(&edev->pdev->dev, BD_UNMAP_ADDR(bd), + PAGE_SIZE, DMA_BIDIRECTIONAL); + __free_page(txq->sw_tx_ring.pages[txq->sw_tx_cons & + NUM_TX_BDS_MAX]); + + txq->sw_tx_cons++; + txq->xmit_pkts++; + } +} + +static int qede_tx_int(struct qede_dev *edev, struct qede_tx_queue *txq) +{ + struct netdev_queue *netdev_txq; + u16 hw_bd_cons; + unsigned int pkts_compl = 0, bytes_compl = 0; + int rc; + + netdev_txq = netdev_get_tx_queue(edev->ndev, txq->index); + + hw_bd_cons = le16_to_cpu(*txq->hw_cons_ptr); + barrier(); + + while (hw_bd_cons != qed_chain_get_cons_idx(&txq->tx_pbl)) { + int len = 0; + + rc = qede_free_tx_pkt(edev, txq, &len); + if (rc) { + DP_NOTICE(edev, "hw_bd_cons = %d, chain_cons=%d\n", + hw_bd_cons, + qed_chain_get_cons_idx(&txq->tx_pbl)); + break; + } + + bytes_compl += len; + pkts_compl++; + txq->sw_tx_cons++; + txq->xmit_pkts++; + } + + netdev_tx_completed_queue(netdev_txq, pkts_compl, bytes_compl); + + /* Need to make the tx_bd_cons update visible to start_xmit() + * before checking for netif_tx_queue_stopped(). Without the + * memory barrier, there is a small possibility that + * start_xmit() will miss it and cause the queue to be stopped + * forever. + * On the other hand we need an rmb() here to ensure the proper + * ordering of bit testing in the following + * netif_tx_queue_stopped(txq) call. + */ + smp_mb(); + + if (unlikely(netif_tx_queue_stopped(netdev_txq))) { + /* Taking tx_lock is needed to prevent reenabling the queue + * while it's empty. This could have happen if rx_action() gets + * suspended in qede_tx_int() after the condition before + * netif_tx_wake_queue(), while tx_action (qede_start_xmit()): + * + * stops the queue->sees fresh tx_bd_cons->releases the queue-> + * sends some packets consuming the whole queue again-> + * stops the queue + */ + + __netif_tx_lock(netdev_txq, smp_processor_id()); + + if ((netif_tx_queue_stopped(netdev_txq)) && + (edev->state == QEDE_STATE_OPEN) && + (qed_chain_get_elem_left(&txq->tx_pbl) + >= (MAX_SKB_FRAGS + 1))) { + netif_tx_wake_queue(netdev_txq); + DP_VERBOSE(edev, NETIF_MSG_TX_DONE, + "Wake queue was called\n"); + } + + __netif_tx_unlock(netdev_txq); + } + + return 0; +} + +bool qede_has_rx_work(struct qede_rx_queue *rxq) +{ + u16 hw_comp_cons, sw_comp_cons; + + /* Tell compiler that status block fields can change */ + barrier(); + + hw_comp_cons = le16_to_cpu(*rxq->hw_cons_ptr); + sw_comp_cons = qed_chain_get_cons_idx(&rxq->rx_comp_ring); + + return hw_comp_cons != sw_comp_cons; +} + +static inline void qede_rx_bd_ring_consume(struct qede_rx_queue *rxq) +{ + qed_chain_consume(&rxq->rx_bd_ring); + rxq->sw_rx_cons++; +} + +/* This function reuses the buffer(from an offset) from + * consumer index to producer index in the bd ring + */ +static inline void qede_reuse_page(struct qede_rx_queue *rxq, + struct sw_rx_data *curr_cons) +{ + struct eth_rx_bd *rx_bd_prod = qed_chain_produce(&rxq->rx_bd_ring); + struct sw_rx_data *curr_prod; + dma_addr_t new_mapping; + + curr_prod = &rxq->sw_rx_ring[rxq->sw_rx_prod & NUM_RX_BDS_MAX]; + *curr_prod = *curr_cons; + + new_mapping = curr_prod->mapping + curr_prod->page_offset; + + rx_bd_prod->addr.hi = cpu_to_le32(upper_32_bits(new_mapping)); + rx_bd_prod->addr.lo = cpu_to_le32(lower_32_bits(new_mapping)); + + rxq->sw_rx_prod++; + curr_cons->data = NULL; +} + +/* In case of allocation failures reuse buffers + * from consumer index to produce buffers for firmware + */ +void qede_recycle_rx_bd_ring(struct qede_rx_queue *rxq, u8 count) +{ + struct sw_rx_data *curr_cons; + + for (; count > 0; count--) { + curr_cons = &rxq->sw_rx_ring[rxq->sw_rx_cons & NUM_RX_BDS_MAX]; + qede_reuse_page(rxq, curr_cons); + qede_rx_bd_ring_consume(rxq); + } +} + +static inline int qede_realloc_rx_buffer(struct qede_rx_queue *rxq, + struct sw_rx_data *curr_cons) +{ + /* Move to the next segment in the page */ + curr_cons->page_offset += rxq->rx_buf_seg_size; + + if (curr_cons->page_offset == PAGE_SIZE) { + if (unlikely(qede_alloc_rx_buffer(rxq))) { + /* Since we failed to allocate new buffer + * current buffer can be used again. + */ + curr_cons->page_offset -= rxq->rx_buf_seg_size; + + return -ENOMEM; + } + + dma_unmap_page(rxq->dev, curr_cons->mapping, + PAGE_SIZE, rxq->data_direction); + } else { + /* Increment refcount of the page as we don't want + * network stack to take the ownership of the page + * which can be recycled multiple times by the driver. + */ + page_ref_inc(curr_cons->data); + qede_reuse_page(rxq, curr_cons); + } + + return 0; +} + +void qede_update_rx_prod(struct qede_dev *edev, struct qede_rx_queue *rxq) +{ + u16 bd_prod = qed_chain_get_prod_idx(&rxq->rx_bd_ring); + u16 cqe_prod = qed_chain_get_prod_idx(&rxq->rx_comp_ring); + struct eth_rx_prod_data rx_prods = {0}; + + /* Update producers */ + rx_prods.bd_prod = cpu_to_le16(bd_prod); + rx_prods.cqe_prod = cpu_to_le16(cqe_prod); + + /* Make sure that the BD and SGE data is updated before updating the + * producers since FW might read the BD/SGE right after the producer + * is updated. + */ + wmb(); + + internal_ram_wr(rxq->hw_rxq_prod_addr, sizeof(rx_prods), + (u32 *)&rx_prods); + + /* mmiowb is needed to synchronize doorbell writes from more than one + * processor. It guarantees that the write arrives to the device before + * the napi lock is released and another qede_poll is called (possibly + * on another CPU). Without this barrier, the next doorbell can bypass + * this doorbell. This is applicable to IA64/Altix systems. + */ + mmiowb(); +} + +static void qede_get_rxhash(struct sk_buff *skb, u8 bitfields, __le32 rss_hash) +{ + enum pkt_hash_types hash_type = PKT_HASH_TYPE_NONE; + enum rss_hash_type htype; + u32 hash = 0; + + htype = GET_FIELD(bitfields, ETH_FAST_PATH_RX_REG_CQE_RSS_HASH_TYPE); + if (htype) { + hash_type = ((htype == RSS_HASH_TYPE_IPV4) || + (htype == RSS_HASH_TYPE_IPV6)) ? + PKT_HASH_TYPE_L3 : PKT_HASH_TYPE_L4; + hash = le32_to_cpu(rss_hash); + } + skb_set_hash(skb, hash, hash_type); +} + +static void qede_set_skb_csum(struct sk_buff *skb, u8 csum_flag) +{ + skb_checksum_none_assert(skb); + + if (csum_flag & QEDE_CSUM_UNNECESSARY) + skb->ip_summed = CHECKSUM_UNNECESSARY; + + if (csum_flag & QEDE_TUNN_CSUM_UNNECESSARY) + skb->csum_level = 1; +} + +static inline void qede_skb_receive(struct qede_dev *edev, + struct qede_fastpath *fp, + struct qede_rx_queue *rxq, + struct sk_buff *skb, u16 vlan_tag) +{ + if (vlan_tag) + __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tag); + + napi_gro_receive(&fp->napi, skb); + fp->rxq->rcv_pkts++; +} + +static void qede_set_gro_params(struct qede_dev *edev, + struct sk_buff *skb, + struct eth_fast_path_rx_tpa_start_cqe *cqe) +{ + u16 parsing_flags = le16_to_cpu(cqe->pars_flags.flags); + + if (((parsing_flags >> PARSING_AND_ERR_FLAGS_L3TYPE_SHIFT) & + PARSING_AND_ERR_FLAGS_L3TYPE_MASK) == 2) + skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6; + else + skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; + + skb_shinfo(skb)->gso_size = __le16_to_cpu(cqe->len_on_first_bd) - + cqe->header_len; +} + +static int qede_fill_frag_skb(struct qede_dev *edev, + struct qede_rx_queue *rxq, + u8 tpa_agg_index, u16 len_on_bd) +{ + struct sw_rx_data *current_bd = &rxq->sw_rx_ring[rxq->sw_rx_cons & + NUM_RX_BDS_MAX]; + struct qede_agg_info *tpa_info = &rxq->tpa_info[tpa_agg_index]; + struct sk_buff *skb = tpa_info->skb; + + if (unlikely(tpa_info->state != QEDE_AGG_STATE_START)) + goto out; + + /* Add one frag and update the appropriate fields in the skb */ + skb_fill_page_desc(skb, tpa_info->frag_id++, + current_bd->data, current_bd->page_offset, + len_on_bd); + + if (unlikely(qede_realloc_rx_buffer(rxq, current_bd))) { + /* Incr page ref count to reuse on allocation failure + * so that it doesn't get freed while freeing SKB. + */ + page_ref_inc(current_bd->data); + goto out; + } + + qed_chain_consume(&rxq->rx_bd_ring); + rxq->sw_rx_cons++; + + skb->data_len += len_on_bd; + skb->truesize += rxq->rx_buf_seg_size; + skb->len += len_on_bd; + + return 0; + +out: + tpa_info->state = QEDE_AGG_STATE_ERROR; + qede_recycle_rx_bd_ring(rxq, 1); + + return -ENOMEM; +} + +static bool qede_tunn_exist(u16 flag) +{ + return !!(flag & (PARSING_AND_ERR_FLAGS_TUNNELEXIST_MASK << + PARSING_AND_ERR_FLAGS_TUNNELEXIST_SHIFT)); +} + +static u8 qede_check_tunn_csum(u16 flag) +{ + u16 csum_flag = 0; + u8 tcsum = 0; + + if (flag & (PARSING_AND_ERR_FLAGS_TUNNELL4CHKSMWASCALCULATED_MASK << + PARSING_AND_ERR_FLAGS_TUNNELL4CHKSMWASCALCULATED_SHIFT)) + csum_flag |= PARSING_AND_ERR_FLAGS_TUNNELL4CHKSMERROR_MASK << + PARSING_AND_ERR_FLAGS_TUNNELL4CHKSMERROR_SHIFT; + + if (flag & (PARSING_AND_ERR_FLAGS_L4CHKSMWASCALCULATED_MASK << + PARSING_AND_ERR_FLAGS_L4CHKSMWASCALCULATED_SHIFT)) { + csum_flag |= PARSING_AND_ERR_FLAGS_L4CHKSMERROR_MASK << + PARSING_AND_ERR_FLAGS_L4CHKSMERROR_SHIFT; + tcsum = QEDE_TUNN_CSUM_UNNECESSARY; + } + + csum_flag |= PARSING_AND_ERR_FLAGS_TUNNELIPHDRERROR_MASK << + PARSING_AND_ERR_FLAGS_TUNNELIPHDRERROR_SHIFT | + PARSING_AND_ERR_FLAGS_IPHDRERROR_MASK << + PARSING_AND_ERR_FLAGS_IPHDRERROR_SHIFT; + + if (csum_flag & flag) + return QEDE_CSUM_ERROR; + + return QEDE_CSUM_UNNECESSARY | tcsum; +} + +static void qede_tpa_start(struct qede_dev *edev, + struct qede_rx_queue *rxq, + struct eth_fast_path_rx_tpa_start_cqe *cqe) +{ + struct qede_agg_info *tpa_info = &rxq->tpa_info[cqe->tpa_agg_index]; + struct eth_rx_bd *rx_bd_cons = qed_chain_consume(&rxq->rx_bd_ring); + struct eth_rx_bd *rx_bd_prod = qed_chain_produce(&rxq->rx_bd_ring); + struct sw_rx_data *replace_buf = &tpa_info->buffer; + dma_addr_t mapping = tpa_info->buffer_mapping; + struct sw_rx_data *sw_rx_data_cons; + struct sw_rx_data *sw_rx_data_prod; + + sw_rx_data_cons = &rxq->sw_rx_ring[rxq->sw_rx_cons & NUM_RX_BDS_MAX]; + sw_rx_data_prod = &rxq->sw_rx_ring[rxq->sw_rx_prod & NUM_RX_BDS_MAX]; + + /* Use pre-allocated replacement buffer - we can't release the agg. + * start until its over and we don't want to risk allocation failing + * here, so re-allocate when aggregation will be over. + */ + sw_rx_data_prod->mapping = replace_buf->mapping; + + sw_rx_data_prod->data = replace_buf->data; + rx_bd_prod->addr.hi = cpu_to_le32(upper_32_bits(mapping)); + rx_bd_prod->addr.lo = cpu_to_le32(lower_32_bits(mapping)); + sw_rx_data_prod->page_offset = replace_buf->page_offset; + + rxq->sw_rx_prod++; + + /* move partial skb from cons to pool (don't unmap yet) + * save mapping, incase we drop the packet later on. + */ + tpa_info->buffer = *sw_rx_data_cons; + mapping = HILO_U64(le32_to_cpu(rx_bd_cons->addr.hi), + le32_to_cpu(rx_bd_cons->addr.lo)); + + tpa_info->buffer_mapping = mapping; + rxq->sw_rx_cons++; + + /* set tpa state to start only if we are able to allocate skb + * for this aggregation, otherwise mark as error and aggregation will + * be dropped + */ + tpa_info->skb = netdev_alloc_skb(edev->ndev, + le16_to_cpu(cqe->len_on_first_bd)); + if (unlikely(!tpa_info->skb)) { + DP_NOTICE(edev, "Failed to allocate SKB for gro\n"); + tpa_info->state = QEDE_AGG_STATE_ERROR; + goto cons_buf; + } + + /* Start filling in the aggregation info */ + skb_put(tpa_info->skb, le16_to_cpu(cqe->len_on_first_bd)); + tpa_info->frag_id = 0; + tpa_info->state = QEDE_AGG_STATE_START; + + /* Store some information from first CQE */ + tpa_info->start_cqe_placement_offset = cqe->placement_offset; + tpa_info->start_cqe_bd_len = le16_to_cpu(cqe->len_on_first_bd); + if ((le16_to_cpu(cqe->pars_flags.flags) >> + PARSING_AND_ERR_FLAGS_TAG8021QEXIST_SHIFT) & + PARSING_AND_ERR_FLAGS_TAG8021QEXIST_MASK) + tpa_info->vlan_tag = le16_to_cpu(cqe->vlan_tag); + else + tpa_info->vlan_tag = 0; + + qede_get_rxhash(tpa_info->skb, cqe->bitfields, cqe->rss_hash); + + /* This is needed in order to enable forwarding support */ + qede_set_gro_params(edev, tpa_info->skb, cqe); + +cons_buf: /* We still need to handle bd_len_list to consume buffers */ + if (likely(cqe->ext_bd_len_list[0])) + qede_fill_frag_skb(edev, rxq, cqe->tpa_agg_index, + le16_to_cpu(cqe->ext_bd_len_list[0])); + + if (unlikely(cqe->ext_bd_len_list[1])) { + DP_ERR(edev, + "Unlikely - got a TPA aggregation with more than one ext_bd_len_list entry in the TPA start\n"); + tpa_info->state = QEDE_AGG_STATE_ERROR; + } +} + +#ifdef CONFIG_INET +static void qede_gro_ip_csum(struct sk_buff *skb) +{ + const struct iphdr *iph = ip_hdr(skb); + struct tcphdr *th; + + skb_set_transport_header(skb, sizeof(struct iphdr)); + th = tcp_hdr(skb); + + th->check = ~tcp_v4_check(skb->len - skb_transport_offset(skb), + iph->saddr, iph->daddr, 0); + + tcp_gro_complete(skb); +} + +static void qede_gro_ipv6_csum(struct sk_buff *skb) +{ + struct ipv6hdr *iph = ipv6_hdr(skb); + struct tcphdr *th; + + skb_set_transport_header(skb, sizeof(struct ipv6hdr)); + th = tcp_hdr(skb); + + th->check = ~tcp_v6_check(skb->len - skb_transport_offset(skb), + &iph->saddr, &iph->daddr, 0); + tcp_gro_complete(skb); +} +#endif + +static void qede_gro_receive(struct qede_dev *edev, + struct qede_fastpath *fp, + struct sk_buff *skb, + u16 vlan_tag) +{ + /* FW can send a single MTU sized packet from gro flow + * due to aggregation timeout/last segment etc. which + * is not expected to be a gro packet. If a skb has zero + * frags then simply push it in the stack as non gso skb. + */ + if (unlikely(!skb->data_len)) { + skb_shinfo(skb)->gso_type = 0; + skb_shinfo(skb)->gso_size = 0; + goto send_skb; + } + +#ifdef CONFIG_INET + if (skb_shinfo(skb)->gso_size) { + skb_reset_network_header(skb); + + switch (skb->protocol) { + case htons(ETH_P_IP): + qede_gro_ip_csum(skb); + break; + case htons(ETH_P_IPV6): + qede_gro_ipv6_csum(skb); + break; + default: + DP_ERR(edev, + "Error: FW GRO supports only IPv4/IPv6, not 0x%04x\n", + ntohs(skb->protocol)); + } + } +#endif + +send_skb: + skb_record_rx_queue(skb, fp->rxq->rxq_id); + qede_skb_receive(edev, fp, fp->rxq, skb, vlan_tag); +} + +static inline void qede_tpa_cont(struct qede_dev *edev, + struct qede_rx_queue *rxq, + struct eth_fast_path_rx_tpa_cont_cqe *cqe) +{ + int i; + + for (i = 0; cqe->len_list[i]; i++) + qede_fill_frag_skb(edev, rxq, cqe->tpa_agg_index, + le16_to_cpu(cqe->len_list[i])); + + if (unlikely(i > 1)) + DP_ERR(edev, + "Strange - TPA cont with more than a single len_list entry\n"); +} + +static void qede_tpa_end(struct qede_dev *edev, + struct qede_fastpath *fp, + struct eth_fast_path_rx_tpa_end_cqe *cqe) +{ + struct qede_rx_queue *rxq = fp->rxq; + struct qede_agg_info *tpa_info; + struct sk_buff *skb; + int i; + + tpa_info = &rxq->tpa_info[cqe->tpa_agg_index]; + skb = tpa_info->skb; + + for (i = 0; cqe->len_list[i]; i++) + qede_fill_frag_skb(edev, rxq, cqe->tpa_agg_index, + le16_to_cpu(cqe->len_list[i])); + if (unlikely(i > 1)) + DP_ERR(edev, + "Strange - TPA emd with more than a single len_list entry\n"); + + if (unlikely(tpa_info->state != QEDE_AGG_STATE_START)) + goto err; + + /* Sanity */ + if (unlikely(cqe->num_of_bds != tpa_info->frag_id + 1)) + DP_ERR(edev, + "Strange - TPA had %02x BDs, but SKB has only %d frags\n", + cqe->num_of_bds, tpa_info->frag_id); + if (unlikely(skb->len != le16_to_cpu(cqe->total_packet_len))) + DP_ERR(edev, + "Strange - total packet len [cqe] is %4x but SKB has len %04x\n", + le16_to_cpu(cqe->total_packet_len), skb->len); + + memcpy(skb->data, + page_address(tpa_info->buffer.data) + + tpa_info->start_cqe_placement_offset + + tpa_info->buffer.page_offset, tpa_info->start_cqe_bd_len); + + /* Finalize the SKB */ + skb->protocol = eth_type_trans(skb, edev->ndev); + skb->ip_summed = CHECKSUM_UNNECESSARY; + + /* tcp_gro_complete() will copy NAPI_GRO_CB(skb)->count + * to skb_shinfo(skb)->gso_segs + */ + NAPI_GRO_CB(skb)->count = le16_to_cpu(cqe->num_of_coalesced_segs); + + qede_gro_receive(edev, fp, skb, tpa_info->vlan_tag); + + tpa_info->state = QEDE_AGG_STATE_NONE; + + return; +err: + tpa_info->state = QEDE_AGG_STATE_NONE; + dev_kfree_skb_any(tpa_info->skb); + tpa_info->skb = NULL; +} + +static u8 qede_check_notunn_csum(u16 flag) +{ + u16 csum_flag = 0; + u8 csum = 0; + + if (flag & (PARSING_AND_ERR_FLAGS_L4CHKSMWASCALCULATED_MASK << + PARSING_AND_ERR_FLAGS_L4CHKSMWASCALCULATED_SHIFT)) { + csum_flag |= PARSING_AND_ERR_FLAGS_L4CHKSMERROR_MASK << + PARSING_AND_ERR_FLAGS_L4CHKSMERROR_SHIFT; + csum = QEDE_CSUM_UNNECESSARY; + } + + csum_flag |= PARSING_AND_ERR_FLAGS_IPHDRERROR_MASK << + PARSING_AND_ERR_FLAGS_IPHDRERROR_SHIFT; + + if (csum_flag & flag) + return QEDE_CSUM_ERROR; + + return csum; +} + +static u8 qede_check_csum(u16 flag) +{ + if (!qede_tunn_exist(flag)) + return qede_check_notunn_csum(flag); + else + return qede_check_tunn_csum(flag); +} + +static bool qede_pkt_is_ip_fragmented(struct eth_fast_path_rx_reg_cqe *cqe, + u16 flag) +{ + u8 tun_pars_flg = cqe->tunnel_pars_flags.flags; + + if ((tun_pars_flg & (ETH_TUNNEL_PARSING_FLAGS_IPV4_FRAGMENT_MASK << + ETH_TUNNEL_PARSING_FLAGS_IPV4_FRAGMENT_SHIFT)) || + (flag & (PARSING_AND_ERR_FLAGS_IPV4FRAG_MASK << + PARSING_AND_ERR_FLAGS_IPV4FRAG_SHIFT))) + return true; + + return false; +} + +/* Return true iff packet is to be passed to stack */ +static bool qede_rx_xdp(struct qede_dev *edev, + struct qede_fastpath *fp, + struct qede_rx_queue *rxq, + struct bpf_prog *prog, + struct sw_rx_data *bd, + struct eth_fast_path_rx_reg_cqe *cqe) +{ + u16 len = le16_to_cpu(cqe->len_on_first_bd); + struct xdp_buff xdp; + enum xdp_action act; + + xdp.data = page_address(bd->data) + cqe->placement_offset; + xdp.data_end = xdp.data + len; + + /* Queues always have a full reset currently, so for the time + * being until there's atomic program replace just mark read + * side for map helpers. + */ + rcu_read_lock(); + act = bpf_prog_run_xdp(prog, &xdp); + rcu_read_unlock(); + + if (act == XDP_PASS) + return true; + + /* Count number of packets not to be passed to stack */ + rxq->xdp_no_pass++; + + switch (act) { + case XDP_TX: + /* We need the replacement buffer before transmit. */ + if (qede_alloc_rx_buffer(rxq)) { + qede_recycle_rx_bd_ring(rxq, 1); + return false; + } + + /* Now if there's a transmission problem, we'd still have to + * throw current buffer, as replacement was already allocated. + */ + if (qede_xdp_xmit(edev, fp, bd, cqe->placement_offset, len)) { + dma_unmap_page(rxq->dev, bd->mapping, + PAGE_SIZE, DMA_BIDIRECTIONAL); + __free_page(bd->data); + } + + /* Regardless, we've consumed an Rx BD */ + qede_rx_bd_ring_consume(rxq); + return false; + + default: + bpf_warn_invalid_xdp_action(act); + case XDP_ABORTED: + case XDP_DROP: + qede_recycle_rx_bd_ring(rxq, cqe->bd_num); + } + + return false; +} + +static struct sk_buff *qede_rx_allocate_skb(struct qede_dev *edev, + struct qede_rx_queue *rxq, + struct sw_rx_data *bd, u16 len, + u16 pad) +{ + unsigned int offset = bd->page_offset; + struct skb_frag_struct *frag; + struct page *page = bd->data; + unsigned int pull_len; + struct sk_buff *skb; + unsigned char *va; + + /* Allocate a new SKB with a sufficient large header len */ + skb = netdev_alloc_skb(edev->ndev, QEDE_RX_HDR_SIZE); + if (unlikely(!skb)) + return NULL; + + /* Copy data into SKB - if it's small, we can simply copy it and + * re-use the already allcoated & mapped memory. + */ + if (len + pad <= edev->rx_copybreak) { + memcpy(skb_put(skb, len), + page_address(page) + pad + offset, len); + qede_reuse_page(rxq, bd); + goto out; + } + + frag = &skb_shinfo(skb)->frags[0]; + + skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, + page, pad + offset, len, rxq->rx_buf_seg_size); + + va = skb_frag_address(frag); + pull_len = eth_get_headlen(va, QEDE_RX_HDR_SIZE); + + /* Align the pull_len to optimize memcpy */ + memcpy(skb->data, va, ALIGN(pull_len, sizeof(long))); + + /* Correct the skb & frag sizes offset after the pull */ + skb_frag_size_sub(frag, pull_len); + frag->page_offset += pull_len; + skb->data_len -= pull_len; + skb->tail += pull_len; + + if (unlikely(qede_realloc_rx_buffer(rxq, bd))) { + /* Incr page ref count to reuse on allocation failure so + * that it doesn't get freed while freeing SKB [as its + * already mapped there]. + */ + page_ref_inc(page); + dev_kfree_skb_any(skb); + return NULL; + } + +out: + /* We've consumed the first BD and prepared an SKB */ + qede_rx_bd_ring_consume(rxq); + return skb; +} + +static int qede_rx_build_jumbo(struct qede_dev *edev, + struct qede_rx_queue *rxq, + struct sk_buff *skb, + struct eth_fast_path_rx_reg_cqe *cqe, + u16 first_bd_len) +{ + u16 pkt_len = le16_to_cpu(cqe->pkt_len); + struct sw_rx_data *bd; + u16 bd_cons_idx; + u8 num_frags; + + pkt_len -= first_bd_len; + + /* We've already used one BD for the SKB. Now take care of the rest */ + for (num_frags = cqe->bd_num - 1; num_frags > 0; num_frags--) { + u16 cur_size = pkt_len > rxq->rx_buf_size ? rxq->rx_buf_size : + pkt_len; + + if (unlikely(!cur_size)) { + DP_ERR(edev, + "Still got %d BDs for mapping jumbo, but length became 0\n", + num_frags); + goto out; + } + + /* We need a replacement buffer for each BD */ + if (unlikely(qede_alloc_rx_buffer(rxq))) + goto out; + + /* Now that we've allocated the replacement buffer, + * we can safely consume the next BD and map it to the SKB. + */ + bd_cons_idx = rxq->sw_rx_cons & NUM_RX_BDS_MAX; + bd = &rxq->sw_rx_ring[bd_cons_idx]; + qede_rx_bd_ring_consume(rxq); + + dma_unmap_page(rxq->dev, bd->mapping, + PAGE_SIZE, DMA_FROM_DEVICE); + + skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags++, + bd->data, 0, cur_size); + + skb->truesize += PAGE_SIZE; + skb->data_len += cur_size; + skb->len += cur_size; + pkt_len -= cur_size; + } + + if (unlikely(pkt_len)) + DP_ERR(edev, + "Mapped all BDs of jumbo, but still have %d bytes\n", + pkt_len); + +out: + return num_frags; +} + +static int qede_rx_process_tpa_cqe(struct qede_dev *edev, + struct qede_fastpath *fp, + struct qede_rx_queue *rxq, + union eth_rx_cqe *cqe, + enum eth_rx_cqe_type type) +{ + switch (type) { + case ETH_RX_CQE_TYPE_TPA_START: + qede_tpa_start(edev, rxq, &cqe->fast_path_tpa_start); + return 0; + case ETH_RX_CQE_TYPE_TPA_CONT: + qede_tpa_cont(edev, rxq, &cqe->fast_path_tpa_cont); + return 0; + case ETH_RX_CQE_TYPE_TPA_END: + qede_tpa_end(edev, fp, &cqe->fast_path_tpa_end); + return 1; + default: + return 0; + } +} + +static int qede_rx_process_cqe(struct qede_dev *edev, + struct qede_fastpath *fp, + struct qede_rx_queue *rxq) +{ + struct bpf_prog *xdp_prog = READ_ONCE(rxq->xdp_prog); + struct eth_fast_path_rx_reg_cqe *fp_cqe; + u16 len, pad, bd_cons_idx, parse_flag; + enum eth_rx_cqe_type cqe_type; + union eth_rx_cqe *cqe; + struct sw_rx_data *bd; + struct sk_buff *skb; + __le16 flags; + u8 csum_flag; + + /* Get the CQE from the completion ring */ + cqe = (union eth_rx_cqe *)qed_chain_consume(&rxq->rx_comp_ring); + cqe_type = cqe->fast_path_regular.type; + + /* Process an unlikely slowpath event */ + if (unlikely(cqe_type == ETH_RX_CQE_TYPE_SLOW_PATH)) { + struct eth_slow_path_rx_cqe *sp_cqe; + + sp_cqe = (struct eth_slow_path_rx_cqe *)cqe; + edev->ops->eth_cqe_completion(edev->cdev, fp->id, sp_cqe); + return 0; + } + + /* Handle TPA cqes */ + if (cqe_type != ETH_RX_CQE_TYPE_REGULAR) + return qede_rx_process_tpa_cqe(edev, fp, rxq, cqe, cqe_type); + + /* Get the data from the SW ring; Consume it only after it's evident + * we wouldn't recycle it. + */ + bd_cons_idx = rxq->sw_rx_cons & NUM_RX_BDS_MAX; + bd = &rxq->sw_rx_ring[bd_cons_idx]; + + fp_cqe = &cqe->fast_path_regular; + len = le16_to_cpu(fp_cqe->len_on_first_bd); + pad = fp_cqe->placement_offset; + + /* Run eBPF program if one is attached */ + if (xdp_prog) + if (!qede_rx_xdp(edev, fp, rxq, xdp_prog, bd, fp_cqe)) + return 1; + + /* If this is an error packet then drop it */ + flags = cqe->fast_path_regular.pars_flags.flags; + parse_flag = le16_to_cpu(flags); + + csum_flag = qede_check_csum(parse_flag); + if (unlikely(csum_flag == QEDE_CSUM_ERROR)) { + if (qede_pkt_is_ip_fragmented(fp_cqe, parse_flag)) { + rxq->rx_ip_frags++; + } else { + DP_NOTICE(edev, + "CQE has error, flags = %x, dropping incoming packet\n", + parse_flag); + rxq->rx_hw_errors++; + qede_recycle_rx_bd_ring(rxq, fp_cqe->bd_num); + return 0; + } + } + + /* Basic validation passed; Need to prepare an SKB. This would also + * guarantee to finally consume the first BD upon success. + */ + skb = qede_rx_allocate_skb(edev, rxq, bd, len, pad); + if (!skb) { + rxq->rx_alloc_errors++; + qede_recycle_rx_bd_ring(rxq, fp_cqe->bd_num); + return 0; + } + + /* In case of Jumbo packet, several PAGE_SIZEd buffers will be pointed + * by a single cqe. + */ + if (fp_cqe->bd_num > 1) { + u16 unmapped_frags = qede_rx_build_jumbo(edev, rxq, skb, + fp_cqe, len); + + if (unlikely(unmapped_frags > 0)) { + qede_recycle_rx_bd_ring(rxq, unmapped_frags); + dev_kfree_skb_any(skb); + return 0; + } + } + + /* The SKB contains all the data. Now prepare meta-magic */ + skb->protocol = eth_type_trans(skb, edev->ndev); + qede_get_rxhash(skb, fp_cqe->bitfields, fp_cqe->rss_hash); + qede_set_skb_csum(skb, csum_flag); + skb_record_rx_queue(skb, rxq->rxq_id); + + /* SKB is prepared - pass it to stack */ + qede_skb_receive(edev, fp, rxq, skb, le16_to_cpu(fp_cqe->vlan_tag)); + + return 1; +} + +static int qede_rx_int(struct qede_fastpath *fp, int budget) +{ + struct qede_rx_queue *rxq = fp->rxq; + struct qede_dev *edev = fp->edev; + u16 hw_comp_cons, sw_comp_cons; + int work_done = 0; + + hw_comp_cons = le16_to_cpu(*rxq->hw_cons_ptr); + sw_comp_cons = qed_chain_get_cons_idx(&rxq->rx_comp_ring); + + /* Memory barrier to prevent the CPU from doing speculative reads of CQE + * / BD in the while-loop before reading hw_comp_cons. If the CQE is + * read before it is written by FW, then FW writes CQE and SB, and then + * the CPU reads the hw_comp_cons, it will use an old CQE. + */ + rmb(); + + /* Loop to complete all indicated BDs */ + while ((sw_comp_cons != hw_comp_cons) && (work_done < budget)) { + qede_rx_process_cqe(edev, fp, rxq); + qed_chain_recycle_consumed(&rxq->rx_comp_ring); + sw_comp_cons = qed_chain_get_cons_idx(&rxq->rx_comp_ring); + work_done++; + } + + /* Update producers */ + qede_update_rx_prod(edev, rxq); + + return work_done; +} + +static bool qede_poll_is_more_work(struct qede_fastpath *fp) +{ + qed_sb_update_sb_idx(fp->sb_info); + + /* *_has_*_work() reads the status block, thus we need to ensure that + * status block indices have been actually read (qed_sb_update_sb_idx) + * prior to this check (*_has_*_work) so that we won't write the + * "newer" value of the status block to HW (if there was a DMA right + * after qede_has_rx_work and if there is no rmb, the memory reading + * (qed_sb_update_sb_idx) may be postponed to right before *_ack_sb). + * In this case there will never be another interrupt until there is + * another update of the status block, while there is still unhandled + * work. + */ + rmb(); + + if (likely(fp->type & QEDE_FASTPATH_RX)) + if (qede_has_rx_work(fp->rxq)) + return true; + + if (fp->type & QEDE_FASTPATH_XDP) + if (qede_txq_has_work(fp->xdp_tx)) + return true; + + if (likely(fp->type & QEDE_FASTPATH_TX)) + if (qede_txq_has_work(fp->txq)) + return true; + + return false; +} + +/********************* + * NDO & API related * + *********************/ +int qede_poll(struct napi_struct *napi, int budget) +{ + struct qede_fastpath *fp = container_of(napi, struct qede_fastpath, + napi); + struct qede_dev *edev = fp->edev; + int rx_work_done = 0; + + if (likely(fp->type & QEDE_FASTPATH_TX) && qede_txq_has_work(fp->txq)) + qede_tx_int(edev, fp->txq); + + if ((fp->type & QEDE_FASTPATH_XDP) && qede_txq_has_work(fp->xdp_tx)) + qede_xdp_tx_int(edev, fp->xdp_tx); + + rx_work_done = (likely(fp->type & QEDE_FASTPATH_RX) && + qede_has_rx_work(fp->rxq)) ? + qede_rx_int(fp, budget) : 0; + if (rx_work_done < budget) { + if (!qede_poll_is_more_work(fp)) { + napi_complete(napi); + + /* Update and reenable interrupts */ + qed_sb_ack(fp->sb_info, IGU_INT_ENABLE, 1); + } else { + rx_work_done = budget; + } + } + + if (fp->xdp_xmit) { + u16 xdp_prod = qed_chain_get_prod_idx(&fp->xdp_tx->tx_pbl); + + fp->xdp_xmit = 0; + fp->xdp_tx->tx_db.data.bd_prod = cpu_to_le16(xdp_prod); + qede_update_tx_producer(fp->xdp_tx); + } + + return rx_work_done; +} + +irqreturn_t qede_msix_fp_int(int irq, void *fp_cookie) +{ + struct qede_fastpath *fp = fp_cookie; + + qed_sb_ack(fp->sb_info, IGU_INT_DISABLE, 0 /*do not update*/); + + napi_schedule_irqoff(&fp->napi); + return IRQ_HANDLED; +} + +/* Main transmit function */ +netdev_tx_t qede_start_xmit(struct sk_buff *skb, struct net_device *ndev) +{ + struct qede_dev *edev = netdev_priv(ndev); + struct netdev_queue *netdev_txq; + struct qede_tx_queue *txq; + struct eth_tx_1st_bd *first_bd; + struct eth_tx_2nd_bd *second_bd = NULL; + struct eth_tx_3rd_bd *third_bd = NULL; + struct eth_tx_bd *tx_data_bd = NULL; + u16 txq_index; + u8 nbd = 0; + dma_addr_t mapping; + int rc, frag_idx = 0, ipv6_ext = 0; + u8 xmit_type; + u16 idx; + u16 hlen; + bool data_split = false; + + /* Get tx-queue context and netdev index */ + txq_index = skb_get_queue_mapping(skb); + WARN_ON(txq_index >= QEDE_TSS_COUNT(edev)); + txq = edev->fp_array[edev->fp_num_rx + txq_index].txq; + netdev_txq = netdev_get_tx_queue(ndev, txq_index); + + WARN_ON(qed_chain_get_elem_left(&txq->tx_pbl) < (MAX_SKB_FRAGS + 1)); + + xmit_type = qede_xmit_type(skb, &ipv6_ext); + +#if ((MAX_SKB_FRAGS + 2) > ETH_TX_MAX_BDS_PER_NON_LSO_PACKET) + if (qede_pkt_req_lin(skb, xmit_type)) { + if (skb_linearize(skb)) { + DP_NOTICE(edev, + "SKB linearization failed - silently dropping this SKB\n"); + dev_kfree_skb_any(skb); + return NETDEV_TX_OK; + } + } +#endif + + /* Fill the entry in the SW ring and the BDs in the FW ring */ + idx = txq->sw_tx_prod & NUM_TX_BDS_MAX; + txq->sw_tx_ring.skbs[idx].skb = skb; + first_bd = (struct eth_tx_1st_bd *) + qed_chain_produce(&txq->tx_pbl); + memset(first_bd, 0, sizeof(*first_bd)); + first_bd->data.bd_flags.bitfields = + 1 << ETH_TX_1ST_BD_FLAGS_START_BD_SHIFT; + + /* Map skb linear data for DMA and set in the first BD */ + mapping = dma_map_single(txq->dev, skb->data, + skb_headlen(skb), DMA_TO_DEVICE); + if (unlikely(dma_mapping_error(txq->dev, mapping))) { + DP_NOTICE(edev, "SKB mapping failed\n"); + qede_free_failed_tx_pkt(txq, first_bd, 0, false); + qede_update_tx_producer(txq); + return NETDEV_TX_OK; + } + nbd++; + BD_SET_UNMAP_ADDR_LEN(first_bd, mapping, skb_headlen(skb)); + + /* In case there is IPv6 with extension headers or LSO we need 2nd and + * 3rd BDs. + */ + if (unlikely((xmit_type & XMIT_LSO) | ipv6_ext)) { + second_bd = (struct eth_tx_2nd_bd *) + qed_chain_produce(&txq->tx_pbl); + memset(second_bd, 0, sizeof(*second_bd)); + + nbd++; + third_bd = (struct eth_tx_3rd_bd *) + qed_chain_produce(&txq->tx_pbl); + memset(third_bd, 0, sizeof(*third_bd)); + + nbd++; + /* We need to fill in additional data in second_bd... */ + tx_data_bd = (struct eth_tx_bd *)second_bd; + } + + if (skb_vlan_tag_present(skb)) { + first_bd->data.vlan = cpu_to_le16(skb_vlan_tag_get(skb)); + first_bd->data.bd_flags.bitfields |= + 1 << ETH_TX_1ST_BD_FLAGS_VLAN_INSERTION_SHIFT; + } + + /* Fill the parsing flags & params according to the requested offload */ + if (xmit_type & XMIT_L4_CSUM) { + /* We don't re-calculate IP checksum as it is already done by + * the upper stack + */ + first_bd->data.bd_flags.bitfields |= + 1 << ETH_TX_1ST_BD_FLAGS_L4_CSUM_SHIFT; + + if (xmit_type & XMIT_ENC) { + first_bd->data.bd_flags.bitfields |= + 1 << ETH_TX_1ST_BD_FLAGS_IP_CSUM_SHIFT; + first_bd->data.bitfields |= + 1 << ETH_TX_DATA_1ST_BD_TUNN_FLAG_SHIFT; + } + + /* Legacy FW had flipped behavior in regard to this bit - + * I.e., needed to set to prevent FW from touching encapsulated + * packets when it didn't need to. + */ + if (unlikely(txq->is_legacy)) + first_bd->data.bitfields ^= + 1 << ETH_TX_DATA_1ST_BD_TUNN_FLAG_SHIFT; + + /* If the packet is IPv6 with extension header, indicate that + * to FW and pass few params, since the device cracker doesn't + * support parsing IPv6 with extension header/s. + */ + if (unlikely(ipv6_ext)) + qede_set_params_for_ipv6_ext(skb, second_bd, third_bd); + } + + if (xmit_type & XMIT_LSO) { + first_bd->data.bd_flags.bitfields |= + (1 << ETH_TX_1ST_BD_FLAGS_LSO_SHIFT); + third_bd->data.lso_mss = + cpu_to_le16(skb_shinfo(skb)->gso_size); + + if (unlikely(xmit_type & XMIT_ENC)) { + first_bd->data.bd_flags.bitfields |= + 1 << ETH_TX_1ST_BD_FLAGS_TUNN_IP_CSUM_SHIFT; + + if (xmit_type & XMIT_ENC_GSO_L4_CSUM) { + u8 tmp = ETH_TX_1ST_BD_FLAGS_TUNN_L4_CSUM_SHIFT; + + first_bd->data.bd_flags.bitfields |= 1 << tmp; + } + hlen = qede_get_skb_hlen(skb, true); + } else { + first_bd->data.bd_flags.bitfields |= + 1 << ETH_TX_1ST_BD_FLAGS_IP_CSUM_SHIFT; + hlen = qede_get_skb_hlen(skb, false); + } + + /* @@@TBD - if will not be removed need to check */ + third_bd->data.bitfields |= + cpu_to_le16(1 << ETH_TX_DATA_3RD_BD_HDR_NBD_SHIFT); + + /* Make life easier for FW guys who can't deal with header and + * data on same BD. If we need to split, use the second bd... + */ + if (unlikely(skb_headlen(skb) > hlen)) { + DP_VERBOSE(edev, NETIF_MSG_TX_QUEUED, + "TSO split header size is %d (%x:%x)\n", + first_bd->nbytes, first_bd->addr.hi, + first_bd->addr.lo); + + mapping = HILO_U64(le32_to_cpu(first_bd->addr.hi), + le32_to_cpu(first_bd->addr.lo)) + + hlen; + + BD_SET_UNMAP_ADDR_LEN(tx_data_bd, mapping, + le16_to_cpu(first_bd->nbytes) - + hlen); + + /* this marks the BD as one that has no + * individual mapping + */ + txq->sw_tx_ring.skbs[idx].flags |= QEDE_TSO_SPLIT_BD; + + first_bd->nbytes = cpu_to_le16(hlen); + + tx_data_bd = (struct eth_tx_bd *)third_bd; + data_split = true; + } + } else { + first_bd->data.bitfields |= + (skb->len & ETH_TX_DATA_1ST_BD_PKT_LEN_MASK) << + ETH_TX_DATA_1ST_BD_PKT_LEN_SHIFT; + } + + /* Handle fragmented skb */ + /* special handle for frags inside 2nd and 3rd bds.. */ + while (tx_data_bd && frag_idx < skb_shinfo(skb)->nr_frags) { + rc = map_frag_to_bd(txq, + &skb_shinfo(skb)->frags[frag_idx], + tx_data_bd); + if (rc) { + qede_free_failed_tx_pkt(txq, first_bd, nbd, data_split); + qede_update_tx_producer(txq); + return NETDEV_TX_OK; + } + + if (tx_data_bd == (struct eth_tx_bd *)second_bd) + tx_data_bd = (struct eth_tx_bd *)third_bd; + else + tx_data_bd = NULL; + + frag_idx++; + } + + /* map last frags into 4th, 5th .... */ + for (; frag_idx < skb_shinfo(skb)->nr_frags; frag_idx++, nbd++) { + tx_data_bd = (struct eth_tx_bd *) + qed_chain_produce(&txq->tx_pbl); + + memset(tx_data_bd, 0, sizeof(*tx_data_bd)); + + rc = map_frag_to_bd(txq, + &skb_shinfo(skb)->frags[frag_idx], + tx_data_bd); + if (rc) { + qede_free_failed_tx_pkt(txq, first_bd, nbd, data_split); + qede_update_tx_producer(txq); + return NETDEV_TX_OK; + } + } + + /* update the first BD with the actual num BDs */ + first_bd->data.nbds = nbd; + + netdev_tx_sent_queue(netdev_txq, skb->len); + + skb_tx_timestamp(skb); + + /* Advance packet producer only before sending the packet since mapping + * of pages may fail. + */ + txq->sw_tx_prod++; + + /* 'next page' entries are counted in the producer value */ + txq->tx_db.data.bd_prod = + cpu_to_le16(qed_chain_get_prod_idx(&txq->tx_pbl)); + + if (!skb->xmit_more || netif_xmit_stopped(netdev_txq)) + qede_update_tx_producer(txq); + + if (unlikely(qed_chain_get_elem_left(&txq->tx_pbl) + < (MAX_SKB_FRAGS + 1))) { + if (skb->xmit_more) + qede_update_tx_producer(txq); + + netif_tx_stop_queue(netdev_txq); + txq->stopped_cnt++; + DP_VERBOSE(edev, NETIF_MSG_TX_QUEUED, + "Stop queue was called\n"); + /* paired memory barrier is in qede_tx_int(), we have to keep + * ordering of set_bit() in netif_tx_stop_queue() and read of + * fp->bd_tx_cons + */ + smp_mb(); + + if ((qed_chain_get_elem_left(&txq->tx_pbl) >= + (MAX_SKB_FRAGS + 1)) && + (edev->state == QEDE_STATE_OPEN)) { + netif_tx_wake_queue(netdev_txq); + DP_VERBOSE(edev, NETIF_MSG_TX_QUEUED, + "Wake queue was called\n"); + } + } + + return NETDEV_TX_OK; +} + +/* 8B udp header + 8B base tunnel header + 32B option length */ +#define QEDE_MAX_TUN_HDR_LEN 48 + +netdev_features_t qede_features_check(struct sk_buff *skb, + struct net_device *dev, + netdev_features_t features) +{ + if (skb->encapsulation) { + u8 l4_proto = 0; + + switch (vlan_get_protocol(skb)) { + case htons(ETH_P_IP): + l4_proto = ip_hdr(skb)->protocol; + break; + case htons(ETH_P_IPV6): + l4_proto = ipv6_hdr(skb)->nexthdr; + break; + default: + return features; + } + + /* Disable offloads for geneve tunnels, as HW can't parse + * the geneve header which has option length greater than 32B. + */ + if ((l4_proto == IPPROTO_UDP) && + ((skb_inner_mac_header(skb) - + skb_transport_header(skb)) > QEDE_MAX_TUN_HDR_LEN)) + return features & ~(NETIF_F_CSUM_MASK | + NETIF_F_GSO_MASK); + } + + return features; +} diff --git a/drivers/net/ethernet/qlogic/qede/qede_main.c b/drivers/net/ethernet/qlogic/qede/qede_main.c index 0851fe3a8f25..1393bf4add7a 100644 --- a/drivers/net/ethernet/qlogic/qede/qede_main.c +++ b/drivers/net/ethernet/qlogic/qede/qede_main.c @@ -317,1608 +317,6 @@ static void __exit qede_cleanup(void) module_init(qede_init); module_exit(qede_cleanup); -/* ------------------------------------------------------------------------- - * START OF FAST-PATH - * ------------------------------------------------------------------------- - */ - -/* Unmap the data and free skb */ -static int qede_free_tx_pkt(struct qede_dev *edev, - struct qede_tx_queue *txq, int *len) -{ - u16 idx = txq->sw_tx_cons & NUM_TX_BDS_MAX; - struct sk_buff *skb = txq->sw_tx_ring.skbs[idx].skb; - struct eth_tx_1st_bd *first_bd; - struct eth_tx_bd *tx_data_bd; - int bds_consumed = 0; - int nbds; - bool data_split = txq->sw_tx_ring.skbs[idx].flags & QEDE_TSO_SPLIT_BD; - int i, split_bd_len = 0; - - if (unlikely(!skb)) { - DP_ERR(edev, - "skb is null for txq idx=%d txq->sw_tx_cons=%d txq->sw_tx_prod=%d\n", - idx, txq->sw_tx_cons, txq->sw_tx_prod); - return -1; - } - - *len = skb->len; - - first_bd = (struct eth_tx_1st_bd *)qed_chain_consume(&txq->tx_pbl); - - bds_consumed++; - - nbds = first_bd->data.nbds; - - if (data_split) { - struct eth_tx_bd *split = (struct eth_tx_bd *) - qed_chain_consume(&txq->tx_pbl); - split_bd_len = BD_UNMAP_LEN(split); - bds_consumed++; - } - dma_unmap_single(&edev->pdev->dev, BD_UNMAP_ADDR(first_bd), - BD_UNMAP_LEN(first_bd) + split_bd_len, DMA_TO_DEVICE); - - /* Unmap the data of the skb frags */ - for (i = 0; i < skb_shinfo(skb)->nr_frags; i++, bds_consumed++) { - tx_data_bd = (struct eth_tx_bd *) - qed_chain_consume(&txq->tx_pbl); - dma_unmap_page(&edev->pdev->dev, BD_UNMAP_ADDR(tx_data_bd), - BD_UNMAP_LEN(tx_data_bd), DMA_TO_DEVICE); - } - - while (bds_consumed++ < nbds) - qed_chain_consume(&txq->tx_pbl); - - /* Free skb */ - dev_kfree_skb_any(skb); - txq->sw_tx_ring.skbs[idx].skb = NULL; - txq->sw_tx_ring.skbs[idx].flags = 0; - - return 0; -} - -/* Unmap the data and free skb when mapping failed during start_xmit */ -static void qede_free_failed_tx_pkt(struct qede_tx_queue *txq, - struct eth_tx_1st_bd *first_bd, - int nbd, bool data_split) -{ - u16 idx = txq->sw_tx_prod & NUM_TX_BDS_MAX; - struct sk_buff *skb = txq->sw_tx_ring.skbs[idx].skb; - struct eth_tx_bd *tx_data_bd; - int i, split_bd_len = 0; - - /* Return prod to its position before this skb was handled */ - qed_chain_set_prod(&txq->tx_pbl, - le16_to_cpu(txq->tx_db.data.bd_prod), first_bd); - - first_bd = (struct eth_tx_1st_bd *)qed_chain_produce(&txq->tx_pbl); - - if (data_split) { - struct eth_tx_bd *split = (struct eth_tx_bd *) - qed_chain_produce(&txq->tx_pbl); - split_bd_len = BD_UNMAP_LEN(split); - nbd--; - } - - dma_unmap_single(txq->dev, BD_UNMAP_ADDR(first_bd), - BD_UNMAP_LEN(first_bd) + split_bd_len, DMA_TO_DEVICE); - - /* Unmap the data of the skb frags */ - for (i = 0; i < nbd; i++) { - tx_data_bd = (struct eth_tx_bd *) - qed_chain_produce(&txq->tx_pbl); - if (tx_data_bd->nbytes) - dma_unmap_page(txq->dev, - BD_UNMAP_ADDR(tx_data_bd), - BD_UNMAP_LEN(tx_data_bd), DMA_TO_DEVICE); - } - - /* Return again prod to its position before this skb was handled */ - qed_chain_set_prod(&txq->tx_pbl, - le16_to_cpu(txq->tx_db.data.bd_prod), first_bd); - - /* Free skb */ - dev_kfree_skb_any(skb); - txq->sw_tx_ring.skbs[idx].skb = NULL; - txq->sw_tx_ring.skbs[idx].flags = 0; -} - -static u32 qede_xmit_type(struct sk_buff *skb, int *ipv6_ext) -{ - u32 rc = XMIT_L4_CSUM; - __be16 l3_proto; - - if (skb->ip_summed != CHECKSUM_PARTIAL) - return XMIT_PLAIN; - - l3_proto = vlan_get_protocol(skb); - if (l3_proto == htons(ETH_P_IPV6) && - (ipv6_hdr(skb)->nexthdr == NEXTHDR_IPV6)) - *ipv6_ext = 1; - - if (skb->encapsulation) { - rc |= XMIT_ENC; - if (skb_is_gso(skb)) { - unsigned short gso_type = skb_shinfo(skb)->gso_type; - - if ((gso_type & SKB_GSO_UDP_TUNNEL_CSUM) || - (gso_type & SKB_GSO_GRE_CSUM)) - rc |= XMIT_ENC_GSO_L4_CSUM; - - rc |= XMIT_LSO; - return rc; - } - } - - if (skb_is_gso(skb)) - rc |= XMIT_LSO; - - return rc; -} - -static void qede_set_params_for_ipv6_ext(struct sk_buff *skb, - struct eth_tx_2nd_bd *second_bd, - struct eth_tx_3rd_bd *third_bd) -{ - u8 l4_proto; - u16 bd2_bits1 = 0, bd2_bits2 = 0; - - bd2_bits1 |= (1 << ETH_TX_DATA_2ND_BD_IPV6_EXT_SHIFT); - - bd2_bits2 |= ((((u8 *)skb_transport_header(skb) - skb->data) >> 1) & - ETH_TX_DATA_2ND_BD_L4_HDR_START_OFFSET_W_MASK) - << ETH_TX_DATA_2ND_BD_L4_HDR_START_OFFSET_W_SHIFT; - - bd2_bits1 |= (ETH_L4_PSEUDO_CSUM_CORRECT_LENGTH << - ETH_TX_DATA_2ND_BD_L4_PSEUDO_CSUM_MODE_SHIFT); - - if (vlan_get_protocol(skb) == htons(ETH_P_IPV6)) - l4_proto = ipv6_hdr(skb)->nexthdr; - else - l4_proto = ip_hdr(skb)->protocol; - - if (l4_proto == IPPROTO_UDP) - bd2_bits1 |= 1 << ETH_TX_DATA_2ND_BD_L4_UDP_SHIFT; - - if (third_bd) - third_bd->data.bitfields |= - cpu_to_le16(((tcp_hdrlen(skb) / 4) & - ETH_TX_DATA_3RD_BD_TCP_HDR_LEN_DW_MASK) << - ETH_TX_DATA_3RD_BD_TCP_HDR_LEN_DW_SHIFT); - - second_bd->data.bitfields1 = cpu_to_le16(bd2_bits1); - second_bd->data.bitfields2 = cpu_to_le16(bd2_bits2); -} - -static int map_frag_to_bd(struct qede_tx_queue *txq, - skb_frag_t *frag, struct eth_tx_bd *bd) -{ - dma_addr_t mapping; - - /* Map skb non-linear frag data for DMA */ - mapping = skb_frag_dma_map(txq->dev, frag, 0, - skb_frag_size(frag), DMA_TO_DEVICE); - if (unlikely(dma_mapping_error(txq->dev, mapping))) - return -ENOMEM; - - /* Setup the data pointer of the frag data */ - BD_SET_UNMAP_ADDR_LEN(bd, mapping, skb_frag_size(frag)); - - return 0; -} - -static u16 qede_get_skb_hlen(struct sk_buff *skb, bool is_encap_pkt) -{ - if (is_encap_pkt) - return (skb_inner_transport_header(skb) + - inner_tcp_hdrlen(skb) - skb->data); - else - return (skb_transport_header(skb) + - tcp_hdrlen(skb) - skb->data); -} - -/* +2 for 1st BD for headers and 2nd BD for headlen (if required) */ -#if ((MAX_SKB_FRAGS + 2) > ETH_TX_MAX_BDS_PER_NON_LSO_PACKET) -static bool qede_pkt_req_lin(struct sk_buff *skb, u8 xmit_type) -{ - int allowed_frags = ETH_TX_MAX_BDS_PER_NON_LSO_PACKET - 1; - - if (xmit_type & XMIT_LSO) { - int hlen; - - hlen = qede_get_skb_hlen(skb, xmit_type & XMIT_ENC); - - /* linear payload would require its own BD */ - if (skb_headlen(skb) > hlen) - allowed_frags--; - } - - return (skb_shinfo(skb)->nr_frags > allowed_frags); -} -#endif - -static inline void qede_update_tx_producer(struct qede_tx_queue *txq) -{ - /* wmb makes sure that the BDs data is updated before updating the - * producer, otherwise FW may read old data from the BDs. - */ - wmb(); - barrier(); - writel(txq->tx_db.raw, txq->doorbell_addr); - - /* mmiowb is needed to synchronize doorbell writes from more than one - * processor. It guarantees that the write arrives to the device before - * the queue lock is released and another start_xmit is called (possibly - * on another CPU). Without this barrier, the next doorbell can bypass - * this doorbell. This is applicable to IA64/Altix systems. - */ - mmiowb(); -} - -static int qede_xdp_xmit(struct qede_dev *edev, struct qede_fastpath *fp, - struct sw_rx_data *metadata, u16 padding, u16 length) -{ - struct qede_tx_queue *txq = fp->xdp_tx; - u16 idx = txq->sw_tx_prod & NUM_TX_BDS_MAX; - struct eth_tx_1st_bd *first_bd; - - if (!qed_chain_get_elem_left(&txq->tx_pbl)) { - txq->stopped_cnt++; - return -ENOMEM; - } - - first_bd = (struct eth_tx_1st_bd *)qed_chain_produce(&txq->tx_pbl); - - memset(first_bd, 0, sizeof(*first_bd)); - first_bd->data.bd_flags.bitfields = - BIT(ETH_TX_1ST_BD_FLAGS_START_BD_SHIFT); - first_bd->data.bitfields |= - (length & ETH_TX_DATA_1ST_BD_PKT_LEN_MASK) << - ETH_TX_DATA_1ST_BD_PKT_LEN_SHIFT; - first_bd->data.nbds = 1; - - /* We can safely ignore the offset, as it's 0 for XDP */ - BD_SET_UNMAP_ADDR_LEN(first_bd, metadata->mapping + padding, length); - - /* Synchronize the buffer back to device, as program [probably] - * has changed it. - */ - dma_sync_single_for_device(&edev->pdev->dev, - metadata->mapping + padding, - length, PCI_DMA_TODEVICE); - - txq->sw_tx_ring.pages[idx] = metadata->data; - txq->sw_tx_prod++; - - /* Mark the fastpath for future XDP doorbell */ - fp->xdp_xmit = 1; - - return 0; -} - -/* Main transmit function */ -static netdev_tx_t qede_start_xmit(struct sk_buff *skb, - struct net_device *ndev) -{ - struct qede_dev *edev = netdev_priv(ndev); - struct netdev_queue *netdev_txq; - struct qede_tx_queue *txq; - struct eth_tx_1st_bd *first_bd; - struct eth_tx_2nd_bd *second_bd = NULL; - struct eth_tx_3rd_bd *third_bd = NULL; - struct eth_tx_bd *tx_data_bd = NULL; - u16 txq_index; - u8 nbd = 0; - dma_addr_t mapping; - int rc, frag_idx = 0, ipv6_ext = 0; - u8 xmit_type; - u16 idx; - u16 hlen; - bool data_split = false; - - /* Get tx-queue context and netdev index */ - txq_index = skb_get_queue_mapping(skb); - WARN_ON(txq_index >= QEDE_TSS_COUNT(edev)); - txq = edev->fp_array[edev->fp_num_rx + txq_index].txq; - netdev_txq = netdev_get_tx_queue(ndev, txq_index); - - WARN_ON(qed_chain_get_elem_left(&txq->tx_pbl) < (MAX_SKB_FRAGS + 1)); - - xmit_type = qede_xmit_type(skb, &ipv6_ext); - -#if ((MAX_SKB_FRAGS + 2) > ETH_TX_MAX_BDS_PER_NON_LSO_PACKET) - if (qede_pkt_req_lin(skb, xmit_type)) { - if (skb_linearize(skb)) { - DP_NOTICE(edev, - "SKB linearization failed - silently dropping this SKB\n"); - dev_kfree_skb_any(skb); - return NETDEV_TX_OK; - } - } -#endif - - /* Fill the entry in the SW ring and the BDs in the FW ring */ - idx = txq->sw_tx_prod & NUM_TX_BDS_MAX; - txq->sw_tx_ring.skbs[idx].skb = skb; - first_bd = (struct eth_tx_1st_bd *) - qed_chain_produce(&txq->tx_pbl); - memset(first_bd, 0, sizeof(*first_bd)); - first_bd->data.bd_flags.bitfields = - 1 << ETH_TX_1ST_BD_FLAGS_START_BD_SHIFT; - - /* Map skb linear data for DMA and set in the first BD */ - mapping = dma_map_single(txq->dev, skb->data, - skb_headlen(skb), DMA_TO_DEVICE); - if (unlikely(dma_mapping_error(txq->dev, mapping))) { - DP_NOTICE(edev, "SKB mapping failed\n"); - qede_free_failed_tx_pkt(txq, first_bd, 0, false); - qede_update_tx_producer(txq); - return NETDEV_TX_OK; - } - nbd++; - BD_SET_UNMAP_ADDR_LEN(first_bd, mapping, skb_headlen(skb)); - - /* In case there is IPv6 with extension headers or LSO we need 2nd and - * 3rd BDs. - */ - if (unlikely((xmit_type & XMIT_LSO) | ipv6_ext)) { - second_bd = (struct eth_tx_2nd_bd *) - qed_chain_produce(&txq->tx_pbl); - memset(second_bd, 0, sizeof(*second_bd)); - - nbd++; - third_bd = (struct eth_tx_3rd_bd *) - qed_chain_produce(&txq->tx_pbl); - memset(third_bd, 0, sizeof(*third_bd)); - - nbd++; - /* We need to fill in additional data in second_bd... */ - tx_data_bd = (struct eth_tx_bd *)second_bd; - } - - if (skb_vlan_tag_present(skb)) { - first_bd->data.vlan = cpu_to_le16(skb_vlan_tag_get(skb)); - first_bd->data.bd_flags.bitfields |= - 1 << ETH_TX_1ST_BD_FLAGS_VLAN_INSERTION_SHIFT; - } - - /* Fill the parsing flags & params according to the requested offload */ - if (xmit_type & XMIT_L4_CSUM) { - /* We don't re-calculate IP checksum as it is already done by - * the upper stack - */ - first_bd->data.bd_flags.bitfields |= - 1 << ETH_TX_1ST_BD_FLAGS_L4_CSUM_SHIFT; - - if (xmit_type & XMIT_ENC) { - first_bd->data.bd_flags.bitfields |= - 1 << ETH_TX_1ST_BD_FLAGS_IP_CSUM_SHIFT; - first_bd->data.bitfields |= - 1 << ETH_TX_DATA_1ST_BD_TUNN_FLAG_SHIFT; - } - - /* Legacy FW had flipped behavior in regard to this bit - - * I.e., needed to set to prevent FW from touching encapsulated - * packets when it didn't need to. - */ - if (unlikely(txq->is_legacy)) - first_bd->data.bitfields ^= - 1 << ETH_TX_DATA_1ST_BD_TUNN_FLAG_SHIFT; - - /* If the packet is IPv6 with extension header, indicate that - * to FW and pass few params, since the device cracker doesn't - * support parsing IPv6 with extension header/s. - */ - if (unlikely(ipv6_ext)) - qede_set_params_for_ipv6_ext(skb, second_bd, third_bd); - } - - if (xmit_type & XMIT_LSO) { - first_bd->data.bd_flags.bitfields |= - (1 << ETH_TX_1ST_BD_FLAGS_LSO_SHIFT); - third_bd->data.lso_mss = - cpu_to_le16(skb_shinfo(skb)->gso_size); - - if (unlikely(xmit_type & XMIT_ENC)) { - first_bd->data.bd_flags.bitfields |= - 1 << ETH_TX_1ST_BD_FLAGS_TUNN_IP_CSUM_SHIFT; - - if (xmit_type & XMIT_ENC_GSO_L4_CSUM) { - u8 tmp = ETH_TX_1ST_BD_FLAGS_TUNN_L4_CSUM_SHIFT; - - first_bd->data.bd_flags.bitfields |= 1 << tmp; - } - hlen = qede_get_skb_hlen(skb, true); - } else { - first_bd->data.bd_flags.bitfields |= - 1 << ETH_TX_1ST_BD_FLAGS_IP_CSUM_SHIFT; - hlen = qede_get_skb_hlen(skb, false); - } - - /* @@@TBD - if will not be removed need to check */ - third_bd->data.bitfields |= - cpu_to_le16((1 << ETH_TX_DATA_3RD_BD_HDR_NBD_SHIFT)); - - /* Make life easier for FW guys who can't deal with header and - * data on same BD. If we need to split, use the second bd... - */ - if (unlikely(skb_headlen(skb) > hlen)) { - DP_VERBOSE(edev, NETIF_MSG_TX_QUEUED, - "TSO split header size is %d (%x:%x)\n", - first_bd->nbytes, first_bd->addr.hi, - first_bd->addr.lo); - - mapping = HILO_U64(le32_to_cpu(first_bd->addr.hi), - le32_to_cpu(first_bd->addr.lo)) + - hlen; - - BD_SET_UNMAP_ADDR_LEN(tx_data_bd, mapping, - le16_to_cpu(first_bd->nbytes) - - hlen); - - /* this marks the BD as one that has no - * individual mapping - */ - txq->sw_tx_ring.skbs[idx].flags |= QEDE_TSO_SPLIT_BD; - - first_bd->nbytes = cpu_to_le16(hlen); - - tx_data_bd = (struct eth_tx_bd *)third_bd; - data_split = true; - } - } else { - first_bd->data.bitfields |= - (skb->len & ETH_TX_DATA_1ST_BD_PKT_LEN_MASK) << - ETH_TX_DATA_1ST_BD_PKT_LEN_SHIFT; - } - - /* Handle fragmented skb */ - /* special handle for frags inside 2nd and 3rd bds.. */ - while (tx_data_bd && frag_idx < skb_shinfo(skb)->nr_frags) { - rc = map_frag_to_bd(txq, - &skb_shinfo(skb)->frags[frag_idx], - tx_data_bd); - if (rc) { - qede_free_failed_tx_pkt(txq, first_bd, nbd, data_split); - qede_update_tx_producer(txq); - return NETDEV_TX_OK; - } - - if (tx_data_bd == (struct eth_tx_bd *)second_bd) - tx_data_bd = (struct eth_tx_bd *)third_bd; - else - tx_data_bd = NULL; - - frag_idx++; - } - - /* map last frags into 4th, 5th .... */ - for (; frag_idx < skb_shinfo(skb)->nr_frags; frag_idx++, nbd++) { - tx_data_bd = (struct eth_tx_bd *) - qed_chain_produce(&txq->tx_pbl); - - memset(tx_data_bd, 0, sizeof(*tx_data_bd)); - - rc = map_frag_to_bd(txq, - &skb_shinfo(skb)->frags[frag_idx], - tx_data_bd); - if (rc) { - qede_free_failed_tx_pkt(txq, first_bd, nbd, data_split); - qede_update_tx_producer(txq); - return NETDEV_TX_OK; - } - } - - /* update the first BD with the actual num BDs */ - first_bd->data.nbds = nbd; - - netdev_tx_sent_queue(netdev_txq, skb->len); - - skb_tx_timestamp(skb); - - /* Advance packet producer only before sending the packet since mapping - * of pages may fail. - */ - txq->sw_tx_prod++; - - /* 'next page' entries are counted in the producer value */ - txq->tx_db.data.bd_prod = - cpu_to_le16(qed_chain_get_prod_idx(&txq->tx_pbl)); - - if (!skb->xmit_more || netif_xmit_stopped(netdev_txq)) - qede_update_tx_producer(txq); - - if (unlikely(qed_chain_get_elem_left(&txq->tx_pbl) - < (MAX_SKB_FRAGS + 1))) { - if (skb->xmit_more) - qede_update_tx_producer(txq); - - netif_tx_stop_queue(netdev_txq); - txq->stopped_cnt++; - DP_VERBOSE(edev, NETIF_MSG_TX_QUEUED, - "Stop queue was called\n"); - /* paired memory barrier is in qede_tx_int(), we have to keep - * ordering of set_bit() in netif_tx_stop_queue() and read of - * fp->bd_tx_cons - */ - smp_mb(); - - if (qed_chain_get_elem_left(&txq->tx_pbl) - >= (MAX_SKB_FRAGS + 1) && - (edev->state == QEDE_STATE_OPEN)) { - netif_tx_wake_queue(netdev_txq); - DP_VERBOSE(edev, NETIF_MSG_TX_QUEUED, - "Wake queue was called\n"); - } - } - - return NETDEV_TX_OK; -} - -int qede_txq_has_work(struct qede_tx_queue *txq) -{ - u16 hw_bd_cons; - - /* Tell compiler that consumer and producer can change */ - barrier(); - hw_bd_cons = le16_to_cpu(*txq->hw_cons_ptr); - if (qed_chain_get_cons_idx(&txq->tx_pbl) == hw_bd_cons + 1) - return 0; - - return hw_bd_cons != qed_chain_get_cons_idx(&txq->tx_pbl); -} - -static void qede_xdp_tx_int(struct qede_dev *edev, struct qede_tx_queue *txq) -{ - struct eth_tx_1st_bd *bd; - u16 hw_bd_cons; - - hw_bd_cons = le16_to_cpu(*txq->hw_cons_ptr); - barrier(); - - while (hw_bd_cons != qed_chain_get_cons_idx(&txq->tx_pbl)) { - bd = (struct eth_tx_1st_bd *)qed_chain_consume(&txq->tx_pbl); - - dma_unmap_single(&edev->pdev->dev, BD_UNMAP_ADDR(bd), - PAGE_SIZE, DMA_BIDIRECTIONAL); - __free_page(txq->sw_tx_ring.pages[txq->sw_tx_cons & - NUM_TX_BDS_MAX]); - - txq->sw_tx_cons++; - txq->xmit_pkts++; - } -} - -static int qede_tx_int(struct qede_dev *edev, struct qede_tx_queue *txq) -{ - struct netdev_queue *netdev_txq; - u16 hw_bd_cons; - unsigned int pkts_compl = 0, bytes_compl = 0; - int rc; - - netdev_txq = netdev_get_tx_queue(edev->ndev, txq->index); - - hw_bd_cons = le16_to_cpu(*txq->hw_cons_ptr); - barrier(); - - while (hw_bd_cons != qed_chain_get_cons_idx(&txq->tx_pbl)) { - int len = 0; - - rc = qede_free_tx_pkt(edev, txq, &len); - if (rc) { - DP_NOTICE(edev, "hw_bd_cons = %d, chain_cons=%d\n", - hw_bd_cons, - qed_chain_get_cons_idx(&txq->tx_pbl)); - break; - } - - bytes_compl += len; - pkts_compl++; - txq->sw_tx_cons++; - txq->xmit_pkts++; - } - - netdev_tx_completed_queue(netdev_txq, pkts_compl, bytes_compl); - - /* Need to make the tx_bd_cons update visible to start_xmit() - * before checking for netif_tx_queue_stopped(). Without the - * memory barrier, there is a small possibility that - * start_xmit() will miss it and cause the queue to be stopped - * forever. - * On the other hand we need an rmb() here to ensure the proper - * ordering of bit testing in the following - * netif_tx_queue_stopped(txq) call. - */ - smp_mb(); - - if (unlikely(netif_tx_queue_stopped(netdev_txq))) { - /* Taking tx_lock is needed to prevent reenabling the queue - * while it's empty. This could have happen if rx_action() gets - * suspended in qede_tx_int() after the condition before - * netif_tx_wake_queue(), while tx_action (qede_start_xmit()): - * - * stops the queue->sees fresh tx_bd_cons->releases the queue-> - * sends some packets consuming the whole queue again-> - * stops the queue - */ - - __netif_tx_lock(netdev_txq, smp_processor_id()); - - if ((netif_tx_queue_stopped(netdev_txq)) && - (edev->state == QEDE_STATE_OPEN) && - (qed_chain_get_elem_left(&txq->tx_pbl) - >= (MAX_SKB_FRAGS + 1))) { - netif_tx_wake_queue(netdev_txq); - DP_VERBOSE(edev, NETIF_MSG_TX_DONE, - "Wake queue was called\n"); - } - - __netif_tx_unlock(netdev_txq); - } - - return 0; -} - -bool qede_has_rx_work(struct qede_rx_queue *rxq) -{ - u16 hw_comp_cons, sw_comp_cons; - - /* Tell compiler that status block fields can change */ - barrier(); - - hw_comp_cons = le16_to_cpu(*rxq->hw_cons_ptr); - sw_comp_cons = qed_chain_get_cons_idx(&rxq->rx_comp_ring); - - return hw_comp_cons != sw_comp_cons; -} - -static inline void qede_rx_bd_ring_consume(struct qede_rx_queue *rxq) -{ - qed_chain_consume(&rxq->rx_bd_ring); - rxq->sw_rx_cons++; -} - -/* This function reuses the buffer(from an offset) from - * consumer index to producer index in the bd ring - */ -static inline void qede_reuse_page(struct qede_rx_queue *rxq, - struct sw_rx_data *curr_cons) -{ - struct eth_rx_bd *rx_bd_prod = qed_chain_produce(&rxq->rx_bd_ring); - struct sw_rx_data *curr_prod; - dma_addr_t new_mapping; - - curr_prod = &rxq->sw_rx_ring[rxq->sw_rx_prod & NUM_RX_BDS_MAX]; - *curr_prod = *curr_cons; - - new_mapping = curr_prod->mapping + curr_prod->page_offset; - - rx_bd_prod->addr.hi = cpu_to_le32(upper_32_bits(new_mapping)); - rx_bd_prod->addr.lo = cpu_to_le32(lower_32_bits(new_mapping)); - - rxq->sw_rx_prod++; - curr_cons->data = NULL; -} - -/* In case of allocation failures reuse buffers - * from consumer index to produce buffers for firmware - */ -void qede_recycle_rx_bd_ring(struct qede_rx_queue *rxq, u8 count) -{ - struct sw_rx_data *curr_cons; - - for (; count > 0; count--) { - curr_cons = &rxq->sw_rx_ring[rxq->sw_rx_cons & NUM_RX_BDS_MAX]; - qede_reuse_page(rxq, curr_cons); - qede_rx_bd_ring_consume(rxq); - } -} - -static int qede_alloc_rx_buffer(struct qede_rx_queue *rxq) -{ - struct sw_rx_data *sw_rx_data; - struct eth_rx_bd *rx_bd; - dma_addr_t mapping; - struct page *data; - - data = alloc_pages(GFP_ATOMIC, 0); - if (unlikely(!data)) - return -ENOMEM; - - /* Map the entire page as it would be used - * for multiple RX buffer segment size mapping. - */ - mapping = dma_map_page(rxq->dev, data, 0, - PAGE_SIZE, rxq->data_direction); - if (unlikely(dma_mapping_error(rxq->dev, mapping))) { - __free_page(data); - return -ENOMEM; - } - - sw_rx_data = &rxq->sw_rx_ring[rxq->sw_rx_prod & NUM_RX_BDS_MAX]; - sw_rx_data->page_offset = 0; - sw_rx_data->data = data; - sw_rx_data->mapping = mapping; - - /* Advance PROD and get BD pointer */ - rx_bd = (struct eth_rx_bd *)qed_chain_produce(&rxq->rx_bd_ring); - WARN_ON(!rx_bd); - rx_bd->addr.hi = cpu_to_le32(upper_32_bits(mapping)); - rx_bd->addr.lo = cpu_to_le32(lower_32_bits(mapping)); - - rxq->sw_rx_prod++; - - return 0; -} - -static inline int qede_realloc_rx_buffer(struct qede_rx_queue *rxq, - struct sw_rx_data *curr_cons) -{ - /* Move to the next segment in the page */ - curr_cons->page_offset += rxq->rx_buf_seg_size; - - if (curr_cons->page_offset == PAGE_SIZE) { - if (unlikely(qede_alloc_rx_buffer(rxq))) { - /* Since we failed to allocate new buffer - * current buffer can be used again. - */ - curr_cons->page_offset -= rxq->rx_buf_seg_size; - - return -ENOMEM; - } - - dma_unmap_page(rxq->dev, curr_cons->mapping, - PAGE_SIZE, rxq->data_direction); - } else { - /* Increment refcount of the page as we don't want - * network stack to take the ownership of the page - * which can be recycled multiple times by the driver. - */ - page_ref_inc(curr_cons->data); - qede_reuse_page(rxq, curr_cons); - } - - return 0; -} - -void qede_update_rx_prod(struct qede_dev *edev, struct qede_rx_queue *rxq) -{ - u16 bd_prod = qed_chain_get_prod_idx(&rxq->rx_bd_ring); - u16 cqe_prod = qed_chain_get_prod_idx(&rxq->rx_comp_ring); - struct eth_rx_prod_data rx_prods = {0}; - - /* Update producers */ - rx_prods.bd_prod = cpu_to_le16(bd_prod); - rx_prods.cqe_prod = cpu_to_le16(cqe_prod); - - /* Make sure that the BD and SGE data is updated before updating the - * producers since FW might read the BD/SGE right after the producer - * is updated. - */ - wmb(); - - internal_ram_wr(rxq->hw_rxq_prod_addr, sizeof(rx_prods), - (u32 *)&rx_prods); - - /* mmiowb is needed to synchronize doorbell writes from more than one - * processor. It guarantees that the write arrives to the device before - * the napi lock is released and another qede_poll is called (possibly - * on another CPU). Without this barrier, the next doorbell can bypass - * this doorbell. This is applicable to IA64/Altix systems. - */ - mmiowb(); -} - -static void qede_get_rxhash(struct sk_buff *skb, u8 bitfields, __le32 rss_hash) -{ - enum pkt_hash_types hash_type = PKT_HASH_TYPE_NONE; - enum rss_hash_type htype; - u32 hash = 0; - - htype = GET_FIELD(bitfields, ETH_FAST_PATH_RX_REG_CQE_RSS_HASH_TYPE); - if (htype) { - hash_type = ((htype == RSS_HASH_TYPE_IPV4) || - (htype == RSS_HASH_TYPE_IPV6)) ? - PKT_HASH_TYPE_L3 : PKT_HASH_TYPE_L4; - hash = le32_to_cpu(rss_hash); - } - skb_set_hash(skb, hash, hash_type); -} - -static void qede_set_skb_csum(struct sk_buff *skb, u8 csum_flag) -{ - skb_checksum_none_assert(skb); - - if (csum_flag & QEDE_CSUM_UNNECESSARY) - skb->ip_summed = CHECKSUM_UNNECESSARY; - - if (csum_flag & QEDE_TUNN_CSUM_UNNECESSARY) - skb->csum_level = 1; -} - -static inline void qede_skb_receive(struct qede_dev *edev, - struct qede_fastpath *fp, - struct qede_rx_queue *rxq, - struct sk_buff *skb, u16 vlan_tag) -{ - if (vlan_tag) - __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tag); - - napi_gro_receive(&fp->napi, skb); - fp->rxq->rcv_pkts++; -} - -static void qede_set_gro_params(struct qede_dev *edev, - struct sk_buff *skb, - struct eth_fast_path_rx_tpa_start_cqe *cqe) -{ - u16 parsing_flags = le16_to_cpu(cqe->pars_flags.flags); - - if (((parsing_flags >> PARSING_AND_ERR_FLAGS_L3TYPE_SHIFT) & - PARSING_AND_ERR_FLAGS_L3TYPE_MASK) == 2) - skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6; - else - skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; - - skb_shinfo(skb)->gso_size = __le16_to_cpu(cqe->len_on_first_bd) - - cqe->header_len; -} - -static int qede_fill_frag_skb(struct qede_dev *edev, - struct qede_rx_queue *rxq, - u8 tpa_agg_index, u16 len_on_bd) -{ - struct sw_rx_data *current_bd = &rxq->sw_rx_ring[rxq->sw_rx_cons & - NUM_RX_BDS_MAX]; - struct qede_agg_info *tpa_info = &rxq->tpa_info[tpa_agg_index]; - struct sk_buff *skb = tpa_info->skb; - - if (unlikely(tpa_info->state != QEDE_AGG_STATE_START)) - goto out; - - /* Add one frag and update the appropriate fields in the skb */ - skb_fill_page_desc(skb, tpa_info->frag_id++, - current_bd->data, current_bd->page_offset, - len_on_bd); - - if (unlikely(qede_realloc_rx_buffer(rxq, current_bd))) { - /* Incr page ref count to reuse on allocation failure - * so that it doesn't get freed while freeing SKB. - */ - page_ref_inc(current_bd->data); - goto out; - } - - qed_chain_consume(&rxq->rx_bd_ring); - rxq->sw_rx_cons++; - - skb->data_len += len_on_bd; - skb->truesize += rxq->rx_buf_seg_size; - skb->len += len_on_bd; - - return 0; - -out: - tpa_info->state = QEDE_AGG_STATE_ERROR; - qede_recycle_rx_bd_ring(rxq, 1); - - return -ENOMEM; -} - -static void qede_tpa_start(struct qede_dev *edev, - struct qede_rx_queue *rxq, - struct eth_fast_path_rx_tpa_start_cqe *cqe) -{ - struct qede_agg_info *tpa_info = &rxq->tpa_info[cqe->tpa_agg_index]; - struct eth_rx_bd *rx_bd_cons = qed_chain_consume(&rxq->rx_bd_ring); - struct eth_rx_bd *rx_bd_prod = qed_chain_produce(&rxq->rx_bd_ring); - struct sw_rx_data *replace_buf = &tpa_info->buffer; - dma_addr_t mapping = tpa_info->buffer_mapping; - struct sw_rx_data *sw_rx_data_cons; - struct sw_rx_data *sw_rx_data_prod; - - sw_rx_data_cons = &rxq->sw_rx_ring[rxq->sw_rx_cons & NUM_RX_BDS_MAX]; - sw_rx_data_prod = &rxq->sw_rx_ring[rxq->sw_rx_prod & NUM_RX_BDS_MAX]; - - /* Use pre-allocated replacement buffer - we can't release the agg. - * start until its over and we don't want to risk allocation failing - * here, so re-allocate when aggregation will be over. - */ - sw_rx_data_prod->mapping = replace_buf->mapping; - - sw_rx_data_prod->data = replace_buf->data; - rx_bd_prod->addr.hi = cpu_to_le32(upper_32_bits(mapping)); - rx_bd_prod->addr.lo = cpu_to_le32(lower_32_bits(mapping)); - sw_rx_data_prod->page_offset = replace_buf->page_offset; - - rxq->sw_rx_prod++; - - /* move partial skb from cons to pool (don't unmap yet) - * save mapping, incase we drop the packet later on. - */ - tpa_info->buffer = *sw_rx_data_cons; - mapping = HILO_U64(le32_to_cpu(rx_bd_cons->addr.hi), - le32_to_cpu(rx_bd_cons->addr.lo)); - - tpa_info->buffer_mapping = mapping; - rxq->sw_rx_cons++; - - /* set tpa state to start only if we are able to allocate skb - * for this aggregation, otherwise mark as error and aggregation will - * be dropped - */ - tpa_info->skb = netdev_alloc_skb(edev->ndev, - le16_to_cpu(cqe->len_on_first_bd)); - if (unlikely(!tpa_info->skb)) { - DP_NOTICE(edev, "Failed to allocate SKB for gro\n"); - tpa_info->state = QEDE_AGG_STATE_ERROR; - goto cons_buf; - } - - /* Start filling in the aggregation info */ - skb_put(tpa_info->skb, le16_to_cpu(cqe->len_on_first_bd)); - tpa_info->frag_id = 0; - tpa_info->state = QEDE_AGG_STATE_START; - - /* Store some information from first CQE */ - tpa_info->start_cqe_placement_offset = cqe->placement_offset; - tpa_info->start_cqe_bd_len = le16_to_cpu(cqe->len_on_first_bd); - if ((le16_to_cpu(cqe->pars_flags.flags) >> - PARSING_AND_ERR_FLAGS_TAG8021QEXIST_SHIFT) & - PARSING_AND_ERR_FLAGS_TAG8021QEXIST_MASK) - tpa_info->vlan_tag = le16_to_cpu(cqe->vlan_tag); - else - tpa_info->vlan_tag = 0; - - qede_get_rxhash(tpa_info->skb, cqe->bitfields, cqe->rss_hash); - - /* This is needed in order to enable forwarding support */ - qede_set_gro_params(edev, tpa_info->skb, cqe); - -cons_buf: /* We still need to handle bd_len_list to consume buffers */ - if (likely(cqe->ext_bd_len_list[0])) - qede_fill_frag_skb(edev, rxq, cqe->tpa_agg_index, - le16_to_cpu(cqe->ext_bd_len_list[0])); - - if (unlikely(cqe->ext_bd_len_list[1])) { - DP_ERR(edev, - "Unlikely - got a TPA aggregation with more than one ext_bd_len_list entry in the TPA start\n"); - tpa_info->state = QEDE_AGG_STATE_ERROR; - } -} - -#ifdef CONFIG_INET -static void qede_gro_ip_csum(struct sk_buff *skb) -{ - const struct iphdr *iph = ip_hdr(skb); - struct tcphdr *th; - - skb_set_transport_header(skb, sizeof(struct iphdr)); - th = tcp_hdr(skb); - - th->check = ~tcp_v4_check(skb->len - skb_transport_offset(skb), - iph->saddr, iph->daddr, 0); - - tcp_gro_complete(skb); -} - -static void qede_gro_ipv6_csum(struct sk_buff *skb) -{ - struct ipv6hdr *iph = ipv6_hdr(skb); - struct tcphdr *th; - - skb_set_transport_header(skb, sizeof(struct ipv6hdr)); - th = tcp_hdr(skb); - - th->check = ~tcp_v6_check(skb->len - skb_transport_offset(skb), - &iph->saddr, &iph->daddr, 0); - tcp_gro_complete(skb); -} -#endif - -static void qede_gro_receive(struct qede_dev *edev, - struct qede_fastpath *fp, - struct sk_buff *skb, - u16 vlan_tag) -{ - /* FW can send a single MTU sized packet from gro flow - * due to aggregation timeout/last segment etc. which - * is not expected to be a gro packet. If a skb has zero - * frags then simply push it in the stack as non gso skb. - */ - if (unlikely(!skb->data_len)) { - skb_shinfo(skb)->gso_type = 0; - skb_shinfo(skb)->gso_size = 0; - goto send_skb; - } - -#ifdef CONFIG_INET - if (skb_shinfo(skb)->gso_size) { - skb_reset_network_header(skb); - - switch (skb->protocol) { - case htons(ETH_P_IP): - qede_gro_ip_csum(skb); - break; - case htons(ETH_P_IPV6): - qede_gro_ipv6_csum(skb); - break; - default: - DP_ERR(edev, - "Error: FW GRO supports only IPv4/IPv6, not 0x%04x\n", - ntohs(skb->protocol)); - } - } -#endif - -send_skb: - skb_record_rx_queue(skb, fp->rxq->rxq_id); - qede_skb_receive(edev, fp, fp->rxq, skb, vlan_tag); -} - -static inline void qede_tpa_cont(struct qede_dev *edev, - struct qede_rx_queue *rxq, - struct eth_fast_path_rx_tpa_cont_cqe *cqe) -{ - int i; - - for (i = 0; cqe->len_list[i]; i++) - qede_fill_frag_skb(edev, rxq, cqe->tpa_agg_index, - le16_to_cpu(cqe->len_list[i])); - - if (unlikely(i > 1)) - DP_ERR(edev, - "Strange - TPA cont with more than a single len_list entry\n"); -} - -static void qede_tpa_end(struct qede_dev *edev, - struct qede_fastpath *fp, - struct eth_fast_path_rx_tpa_end_cqe *cqe) -{ - struct qede_rx_queue *rxq = fp->rxq; - struct qede_agg_info *tpa_info; - struct sk_buff *skb; - int i; - - tpa_info = &rxq->tpa_info[cqe->tpa_agg_index]; - skb = tpa_info->skb; - - for (i = 0; cqe->len_list[i]; i++) - qede_fill_frag_skb(edev, rxq, cqe->tpa_agg_index, - le16_to_cpu(cqe->len_list[i])); - if (unlikely(i > 1)) - DP_ERR(edev, - "Strange - TPA emd with more than a single len_list entry\n"); - - if (unlikely(tpa_info->state != QEDE_AGG_STATE_START)) - goto err; - - /* Sanity */ - if (unlikely(cqe->num_of_bds != tpa_info->frag_id + 1)) - DP_ERR(edev, - "Strange - TPA had %02x BDs, but SKB has only %d frags\n", - cqe->num_of_bds, tpa_info->frag_id); - if (unlikely(skb->len != le16_to_cpu(cqe->total_packet_len))) - DP_ERR(edev, - "Strange - total packet len [cqe] is %4x but SKB has len %04x\n", - le16_to_cpu(cqe->total_packet_len), skb->len); - - memcpy(skb->data, - page_address(tpa_info->buffer.data) + - tpa_info->start_cqe_placement_offset + - tpa_info->buffer.page_offset, tpa_info->start_cqe_bd_len); - - /* Finalize the SKB */ - skb->protocol = eth_type_trans(skb, edev->ndev); - skb->ip_summed = CHECKSUM_UNNECESSARY; - - /* tcp_gro_complete() will copy NAPI_GRO_CB(skb)->count - * to skb_shinfo(skb)->gso_segs - */ - NAPI_GRO_CB(skb)->count = le16_to_cpu(cqe->num_of_coalesced_segs); - - qede_gro_receive(edev, fp, skb, tpa_info->vlan_tag); - - tpa_info->state = QEDE_AGG_STATE_NONE; - - return; -err: - tpa_info->state = QEDE_AGG_STATE_NONE; - dev_kfree_skb_any(tpa_info->skb); - tpa_info->skb = NULL; -} - -static bool qede_tunn_exist(u16 flag) -{ - return !!(flag & (PARSING_AND_ERR_FLAGS_TUNNELEXIST_MASK << - PARSING_AND_ERR_FLAGS_TUNNELEXIST_SHIFT)); -} - -static u8 qede_check_tunn_csum(u16 flag) -{ - u16 csum_flag = 0; - u8 tcsum = 0; - - if (flag & (PARSING_AND_ERR_FLAGS_TUNNELL4CHKSMWASCALCULATED_MASK << - PARSING_AND_ERR_FLAGS_TUNNELL4CHKSMWASCALCULATED_SHIFT)) - csum_flag |= PARSING_AND_ERR_FLAGS_TUNNELL4CHKSMERROR_MASK << - PARSING_AND_ERR_FLAGS_TUNNELL4CHKSMERROR_SHIFT; - - if (flag & (PARSING_AND_ERR_FLAGS_L4CHKSMWASCALCULATED_MASK << - PARSING_AND_ERR_FLAGS_L4CHKSMWASCALCULATED_SHIFT)) { - csum_flag |= PARSING_AND_ERR_FLAGS_L4CHKSMERROR_MASK << - PARSING_AND_ERR_FLAGS_L4CHKSMERROR_SHIFT; - tcsum = QEDE_TUNN_CSUM_UNNECESSARY; - } - - csum_flag |= PARSING_AND_ERR_FLAGS_TUNNELIPHDRERROR_MASK << - PARSING_AND_ERR_FLAGS_TUNNELIPHDRERROR_SHIFT | - PARSING_AND_ERR_FLAGS_IPHDRERROR_MASK << - PARSING_AND_ERR_FLAGS_IPHDRERROR_SHIFT; - - if (csum_flag & flag) - return QEDE_CSUM_ERROR; - - return QEDE_CSUM_UNNECESSARY | tcsum; -} - -static u8 qede_check_notunn_csum(u16 flag) -{ - u16 csum_flag = 0; - u8 csum = 0; - - if (flag & (PARSING_AND_ERR_FLAGS_L4CHKSMWASCALCULATED_MASK << - PARSING_AND_ERR_FLAGS_L4CHKSMWASCALCULATED_SHIFT)) { - csum_flag |= PARSING_AND_ERR_FLAGS_L4CHKSMERROR_MASK << - PARSING_AND_ERR_FLAGS_L4CHKSMERROR_SHIFT; - csum = QEDE_CSUM_UNNECESSARY; - } - - csum_flag |= PARSING_AND_ERR_FLAGS_IPHDRERROR_MASK << - PARSING_AND_ERR_FLAGS_IPHDRERROR_SHIFT; - - if (csum_flag & flag) - return QEDE_CSUM_ERROR; - - return csum; -} - -static u8 qede_check_csum(u16 flag) -{ - if (!qede_tunn_exist(flag)) - return qede_check_notunn_csum(flag); - else - return qede_check_tunn_csum(flag); -} - -static bool qede_pkt_is_ip_fragmented(struct eth_fast_path_rx_reg_cqe *cqe, - u16 flag) -{ - u8 tun_pars_flg = cqe->tunnel_pars_flags.flags; - - if ((tun_pars_flg & (ETH_TUNNEL_PARSING_FLAGS_IPV4_FRAGMENT_MASK << - ETH_TUNNEL_PARSING_FLAGS_IPV4_FRAGMENT_SHIFT)) || - (flag & (PARSING_AND_ERR_FLAGS_IPV4FRAG_MASK << - PARSING_AND_ERR_FLAGS_IPV4FRAG_SHIFT))) - return true; - - return false; -} - -/* Return true iff packet is to be passed to stack */ -static bool qede_rx_xdp(struct qede_dev *edev, - struct qede_fastpath *fp, - struct qede_rx_queue *rxq, - struct bpf_prog *prog, - struct sw_rx_data *bd, - struct eth_fast_path_rx_reg_cqe *cqe) -{ - u16 len = le16_to_cpu(cqe->len_on_first_bd); - struct xdp_buff xdp; - enum xdp_action act; - - xdp.data = page_address(bd->data) + cqe->placement_offset; - xdp.data_end = xdp.data + len; - - /* Queues always have a full reset currently, so for the time - * being until there's atomic program replace just mark read - * side for map helpers. - */ - rcu_read_lock(); - act = bpf_prog_run_xdp(prog, &xdp); - rcu_read_unlock(); - - if (act == XDP_PASS) - return true; - - /* Count number of packets not to be passed to stack */ - rxq->xdp_no_pass++; - - switch (act) { - case XDP_TX: - /* We need the replacement buffer before transmit. */ - if (qede_alloc_rx_buffer(rxq)) { - qede_recycle_rx_bd_ring(rxq, 1); - return false; - } - - /* Now if there's a transmission problem, we'd still have to - * throw current buffer, as replacement was already allocated. - */ - if (qede_xdp_xmit(edev, fp, bd, cqe->placement_offset, len)) { - dma_unmap_page(rxq->dev, bd->mapping, - PAGE_SIZE, DMA_BIDIRECTIONAL); - __free_page(bd->data); - } - - /* Regardless, we've consumed an Rx BD */ - qede_rx_bd_ring_consume(rxq); - return false; - - default: - bpf_warn_invalid_xdp_action(act); - case XDP_ABORTED: - case XDP_DROP: - qede_recycle_rx_bd_ring(rxq, cqe->bd_num); - } - - return false; -} - -static struct sk_buff *qede_rx_allocate_skb(struct qede_dev *edev, - struct qede_rx_queue *rxq, - struct sw_rx_data *bd, u16 len, - u16 pad) -{ - unsigned int offset = bd->page_offset; - struct skb_frag_struct *frag; - struct page *page = bd->data; - unsigned int pull_len; - struct sk_buff *skb; - unsigned char *va; - - /* Allocate a new SKB with a sufficient large header len */ - skb = netdev_alloc_skb(edev->ndev, QEDE_RX_HDR_SIZE); - if (unlikely(!skb)) - return NULL; - - /* Copy data into SKB - if it's small, we can simply copy it and - * re-use the already allcoated & mapped memory. - */ - if (len + pad <= edev->rx_copybreak) { - memcpy(skb_put(skb, len), - page_address(page) + pad + offset, len); - qede_reuse_page(rxq, bd); - goto out; - } - - frag = &skb_shinfo(skb)->frags[0]; - - skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, - page, pad + offset, len, rxq->rx_buf_seg_size); - - va = skb_frag_address(frag); - pull_len = eth_get_headlen(va, QEDE_RX_HDR_SIZE); - - /* Align the pull_len to optimize memcpy */ - memcpy(skb->data, va, ALIGN(pull_len, sizeof(long))); - - /* Correct the skb & frag sizes offset after the pull */ - skb_frag_size_sub(frag, pull_len); - frag->page_offset += pull_len; - skb->data_len -= pull_len; - skb->tail += pull_len; - - if (unlikely(qede_realloc_rx_buffer(rxq, bd))) { - /* Incr page ref count to reuse on allocation failure so - * that it doesn't get freed while freeing SKB [as its - * already mapped there]. - */ - page_ref_inc(page); - dev_kfree_skb_any(skb); - return NULL; - } - -out: - /* We've consumed the first BD and prepared an SKB */ - qede_rx_bd_ring_consume(rxq); - return skb; -} - -static int qede_rx_build_jumbo(struct qede_dev *edev, - struct qede_rx_queue *rxq, - struct sk_buff *skb, - struct eth_fast_path_rx_reg_cqe *cqe, - u16 first_bd_len) -{ - u16 pkt_len = le16_to_cpu(cqe->pkt_len); - struct sw_rx_data *bd; - u16 bd_cons_idx; - u8 num_frags; - - pkt_len -= first_bd_len; - - /* We've already used one BD for the SKB. Now take care of the rest */ - for (num_frags = cqe->bd_num - 1; num_frags > 0; num_frags--) { - u16 cur_size = pkt_len > rxq->rx_buf_size ? rxq->rx_buf_size : - pkt_len; - - if (unlikely(!cur_size)) { - DP_ERR(edev, - "Still got %d BDs for mapping jumbo, but length became 0\n", - num_frags); - goto out; - } - - /* We need a replacement buffer for each BD */ - if (unlikely(qede_alloc_rx_buffer(rxq))) - goto out; - - /* Now that we've allocated the replacement buffer, - * we can safely consume the next BD and map it to the SKB. - */ - bd_cons_idx = rxq->sw_rx_cons & NUM_RX_BDS_MAX; - bd = &rxq->sw_rx_ring[bd_cons_idx]; - qede_rx_bd_ring_consume(rxq); - - dma_unmap_page(rxq->dev, bd->mapping, - PAGE_SIZE, DMA_FROM_DEVICE); - - skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags++, - bd->data, 0, cur_size); - - skb->truesize += PAGE_SIZE; - skb->data_len += cur_size; - skb->len += cur_size; - pkt_len -= cur_size; - } - - if (unlikely(pkt_len)) - DP_ERR(edev, - "Mapped all BDs of jumbo, but still have %d bytes\n", - pkt_len); - -out: - return num_frags; -} - -static int qede_rx_process_tpa_cqe(struct qede_dev *edev, - struct qede_fastpath *fp, - struct qede_rx_queue *rxq, - union eth_rx_cqe *cqe, - enum eth_rx_cqe_type type) -{ - switch (type) { - case ETH_RX_CQE_TYPE_TPA_START: - qede_tpa_start(edev, rxq, &cqe->fast_path_tpa_start); - return 0; - case ETH_RX_CQE_TYPE_TPA_CONT: - qede_tpa_cont(edev, rxq, &cqe->fast_path_tpa_cont); - return 0; - case ETH_RX_CQE_TYPE_TPA_END: - qede_tpa_end(edev, fp, &cqe->fast_path_tpa_end); - return 1; - default: - return 0; - } -} - -static int qede_rx_process_cqe(struct qede_dev *edev, - struct qede_fastpath *fp, - struct qede_rx_queue *rxq) -{ - struct bpf_prog *xdp_prog = READ_ONCE(rxq->xdp_prog); - struct eth_fast_path_rx_reg_cqe *fp_cqe; - u16 len, pad, bd_cons_idx, parse_flag; - enum eth_rx_cqe_type cqe_type; - union eth_rx_cqe *cqe; - struct sw_rx_data *bd; - struct sk_buff *skb; - __le16 flags; - u8 csum_flag; - - /* Get the CQE from the completion ring */ - cqe = (union eth_rx_cqe *)qed_chain_consume(&rxq->rx_comp_ring); - cqe_type = cqe->fast_path_regular.type; - - /* Process an unlikely slowpath event */ - if (unlikely(cqe_type == ETH_RX_CQE_TYPE_SLOW_PATH)) { - struct eth_slow_path_rx_cqe *sp_cqe; - - sp_cqe = (struct eth_slow_path_rx_cqe *)cqe; - edev->ops->eth_cqe_completion(edev->cdev, fp->id, sp_cqe); - return 0; - } - - /* Handle TPA cqes */ - if (cqe_type != ETH_RX_CQE_TYPE_REGULAR) - return qede_rx_process_tpa_cqe(edev, fp, rxq, cqe, cqe_type); - - /* Get the data from the SW ring; Consume it only after it's evident - * we wouldn't recycle it. - */ - bd_cons_idx = rxq->sw_rx_cons & NUM_RX_BDS_MAX; - bd = &rxq->sw_rx_ring[bd_cons_idx]; - - fp_cqe = &cqe->fast_path_regular; - len = le16_to_cpu(fp_cqe->len_on_first_bd); - pad = fp_cqe->placement_offset; - - /* Run eBPF program if one is attached */ - if (xdp_prog) - if (!qede_rx_xdp(edev, fp, rxq, xdp_prog, bd, fp_cqe)) - return 1; - - /* If this is an error packet then drop it */ - flags = cqe->fast_path_regular.pars_flags.flags; - parse_flag = le16_to_cpu(flags); - - csum_flag = qede_check_csum(parse_flag); - if (unlikely(csum_flag == QEDE_CSUM_ERROR)) { - if (qede_pkt_is_ip_fragmented(fp_cqe, parse_flag)) { - rxq->rx_ip_frags++; - } else { - DP_NOTICE(edev, - "CQE has error, flags = %x, dropping incoming packet\n", - parse_flag); - rxq->rx_hw_errors++; - qede_recycle_rx_bd_ring(rxq, fp_cqe->bd_num); - return 0; - } - } - - /* Basic validation passed; Need to prepare an SKB. This would also - * guarantee to finally consume the first BD upon success. - */ - skb = qede_rx_allocate_skb(edev, rxq, bd, len, pad); - if (!skb) { - rxq->rx_alloc_errors++; - qede_recycle_rx_bd_ring(rxq, fp_cqe->bd_num); - return 0; - } - - /* In case of Jumbo packet, several PAGE_SIZEd buffers will be pointed - * by a single cqe. - */ - if (fp_cqe->bd_num > 1) { - u16 unmapped_frags = qede_rx_build_jumbo(edev, rxq, skb, - fp_cqe, len); - - if (unlikely(unmapped_frags > 0)) { - qede_recycle_rx_bd_ring(rxq, unmapped_frags); - dev_kfree_skb_any(skb); - return 0; - } - } - - /* The SKB contains all the data. Now prepare meta-magic */ - skb->protocol = eth_type_trans(skb, edev->ndev); - qede_get_rxhash(skb, fp_cqe->bitfields, fp_cqe->rss_hash); - qede_set_skb_csum(skb, csum_flag); - skb_record_rx_queue(skb, rxq->rxq_id); - - /* SKB is prepared - pass it to stack */ - qede_skb_receive(edev, fp, rxq, skb, le16_to_cpu(fp_cqe->vlan_tag)); - - return 1; -} - -static int qede_rx_int(struct qede_fastpath *fp, int budget) -{ - struct qede_rx_queue *rxq = fp->rxq; - struct qede_dev *edev = fp->edev; - u16 hw_comp_cons, sw_comp_cons; - int work_done = 0; - - hw_comp_cons = le16_to_cpu(*rxq->hw_cons_ptr); - sw_comp_cons = qed_chain_get_cons_idx(&rxq->rx_comp_ring); - - /* Memory barrier to prevent the CPU from doing speculative reads of CQE - * / BD in the while-loop before reading hw_comp_cons. If the CQE is - * read before it is written by FW, then FW writes CQE and SB, and then - * the CPU reads the hw_comp_cons, it will use an old CQE. - */ - rmb(); - - /* Loop to complete all indicated BDs */ - while ((sw_comp_cons != hw_comp_cons) && (work_done < budget)) { - qede_rx_process_cqe(edev, fp, rxq); - qed_chain_recycle_consumed(&rxq->rx_comp_ring); - sw_comp_cons = qed_chain_get_cons_idx(&rxq->rx_comp_ring); - work_done++; - } - - /* Update producers */ - qede_update_rx_prod(edev, rxq); - - return work_done; -} - -static bool qede_poll_is_more_work(struct qede_fastpath *fp) -{ - qed_sb_update_sb_idx(fp->sb_info); - - /* *_has_*_work() reads the status block, thus we need to ensure that - * status block indices have been actually read (qed_sb_update_sb_idx) - * prior to this check (*_has_*_work) so that we won't write the - * "newer" value of the status block to HW (if there was a DMA right - * after qede_has_rx_work and if there is no rmb, the memory reading - * (qed_sb_update_sb_idx) may be postponed to right before *_ack_sb). - * In this case there will never be another interrupt until there is - * another update of the status block, while there is still unhandled - * work. - */ - rmb(); - - if (likely(fp->type & QEDE_FASTPATH_RX)) - if (qede_has_rx_work(fp->rxq)) - return true; - - if (fp->type & QEDE_FASTPATH_XDP) - if (qede_txq_has_work(fp->xdp_tx)) - return true; - - if (likely(fp->type & QEDE_FASTPATH_TX)) - if (qede_txq_has_work(fp->txq)) - return true; - - return false; -} - -static int qede_poll(struct napi_struct *napi, int budget) -{ - struct qede_fastpath *fp = container_of(napi, struct qede_fastpath, - napi); - struct qede_dev *edev = fp->edev; - int rx_work_done = 0; - - if (likely(fp->type & QEDE_FASTPATH_TX) && qede_txq_has_work(fp->txq)) - qede_tx_int(edev, fp->txq); - - if ((fp->type & QEDE_FASTPATH_XDP) && qede_txq_has_work(fp->xdp_tx)) - qede_xdp_tx_int(edev, fp->xdp_tx); - - rx_work_done = (likely(fp->type & QEDE_FASTPATH_RX) && - qede_has_rx_work(fp->rxq)) ? - qede_rx_int(fp, budget) : 0; - if (rx_work_done < budget) { - if (!qede_poll_is_more_work(fp)) { - napi_complete(napi); - - /* Update and reenable interrupts */ - qed_sb_ack(fp->sb_info, IGU_INT_ENABLE, 1); - } else { - rx_work_done = budget; - } - } - - if (fp->xdp_xmit) { - u16 xdp_prod = qed_chain_get_prod_idx(&fp->xdp_tx->tx_pbl); - - fp->xdp_xmit = 0; - fp->xdp_tx->tx_db.data.bd_prod = cpu_to_le16(xdp_prod); - qede_update_tx_producer(fp->xdp_tx); - } - - return rx_work_done; -} - -static irqreturn_t qede_msix_fp_int(int irq, void *fp_cookie) -{ - struct qede_fastpath *fp = fp_cookie; - - qed_sb_ack(fp->sb_info, IGU_INT_DISABLE, 0 /*do not update*/); - - napi_schedule_irqoff(&fp->napi); - return IRQ_HANDLED; -} - -/* ------------------------------------------------------------------------- - * END OF FAST-PATH - * ------------------------------------------------------------------------- - */ - static int qede_open(struct net_device *ndev); static int qede_close(struct net_device *ndev); static int qede_set_mac_addr(struct net_device *ndev, void *p); @@ -2482,40 +880,6 @@ static void qede_udp_tunnel_del(struct net_device *dev, schedule_delayed_work(&edev->sp_task, 0); } -/* 8B udp header + 8B base tunnel header + 32B option length */ -#define QEDE_MAX_TUN_HDR_LEN 48 - -static netdev_features_t qede_features_check(struct sk_buff *skb, - struct net_device *dev, - netdev_features_t features) -{ - if (skb->encapsulation) { - u8 l4_proto = 0; - - switch (vlan_get_protocol(skb)) { - case htons(ETH_P_IP): - l4_proto = ip_hdr(skb)->protocol; - break; - case htons(ETH_P_IPV6): - l4_proto = ipv6_hdr(skb)->nexthdr; - break; - default: - return features; - } - - /* Disable offloads for geneve tunnels, as HW can't parse - * the geneve header which has option length greater than 32B. - */ - if ((l4_proto == IPPROTO_UDP) && - ((skb_inner_mac_header(skb) - - skb_transport_header(skb)) > QEDE_MAX_TUN_HDR_LEN)) - return features & ~(NETIF_F_CSUM_MASK | - NETIF_F_GSO_MASK); - } - - return features; -} - static void qede_xdp_reload_func(struct qede_dev *edev, struct qede_reload_args *args) { |