| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Yuval Mintz | 10223 | 74.47% | 21 | 21.65% |
| Michal Kalderon | 2098 | 15.28% | 21 | 21.65% |
| Shai Malin | 230 | 1.68% | 5 | 5.15% |
| Manish Chopra | 217 | 1.58% | 9 | 9.28% |
| Sudarsana Reddy Kalluru | 175 | 1.27% | 6 | 6.19% |
| Ram Amrani | 146 | 1.06% | 5 | 5.15% |
| Ariel Elior | 144 | 1.05% | 2 | 2.06% |
| Alexander Lobakin | 127 | 0.93% | 4 | 4.12% |
| Tomer Tayar | 86 | 0.63% | 3 | 3.09% |
| Arun Easi | 85 | 0.62% | 1 | 1.03% |
| Rahul Verma | 60 | 0.44% | 1 | 1.03% |
| Arnd Bergmann | 40 | 0.29% | 2 | 2.06% |
| Nathan Chancellor | 33 | 0.24% | 1 | 1.03% |
| Gustavo A. R. Silva | 12 | 0.09% | 1 | 1.03% |
| Prabhakar Kushwaha | 10 | 0.07% | 1 | 1.03% |
| Colin Ian King | 9 | 0.07% | 4 | 4.12% |
| Omkar Kulkarni | 8 | 0.06% | 2 | 2.06% |
| Yuval Bason | 7 | 0.05% | 1 | 1.03% |
| Wei Yongjun | 7 | 0.05% | 2 | 2.06% |
| Dan Carpenter | 5 | 0.04% | 1 | 1.03% |
| Denis Bolotin | 3 | 0.02% | 1 | 1.03% |
| Zou Wei | 1 | 0.01% | 1 | 1.03% |
| Kees Cook | 1 | 0.01% | 1 | 1.03% |
| Yue haibing | 1 | 0.01% | 1 | 1.03% |
| Total | 13728 | 97 |
// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) /* QLogic qed NIC Driver * Copyright (c) 2015-2017 QLogic Corporation * Copyright (c) 2019-2020 Marvell International Ltd. */ #include <linux/types.h> #include <asm/byteorder.h> #include <linux/dma-mapping.h> #include <linux/if_vlan.h> #include <linux/kernel.h> #include <linux/pci.h> #include <linux/slab.h> #include <linux/stddef.h> #include <linux/workqueue.h> #include <net/ipv6.h> #include <linux/bitops.h> #include <linux/delay.h> #include <linux/errno.h> #include <linux/etherdevice.h> #include <linux/io.h> #include <linux/list.h> #include <linux/mutex.h> #include <linux/spinlock.h> #include <linux/string.h> #include <linux/qed/qed_ll2_if.h> #include "qed.h" #include "qed_cxt.h" #include "qed_dev_api.h" #include "qed_hsi.h" #include "qed_iro_hsi.h" #include "qed_hw.h" #include "qed_int.h" #include "qed_ll2.h" #include "qed_mcp.h" #include "qed_ooo.h" #include "qed_reg_addr.h" #include "qed_sp.h" #include "qed_rdma.h" #define QED_LL2_RX_REGISTERED(ll2) ((ll2)->rx_queue.b_cb_registered) #define QED_LL2_TX_REGISTERED(ll2) ((ll2)->tx_queue.b_cb_registered) #define QED_LL2_TX_SIZE (256) #define QED_LL2_RX_SIZE (4096) #define QED_LL2_INVALID_STATS_ID 0xff struct qed_cb_ll2_info { int rx_cnt; u32 rx_size; u8 handle; /* Lock protecting LL2 buffer lists in sleepless context */ spinlock_t lock; struct list_head list; const struct qed_ll2_cb_ops *cbs; void *cb_cookie; }; struct qed_ll2_buffer { struct list_head list; void *data; dma_addr_t phys_addr; }; static u8 qed_ll2_handle_to_stats_id(struct qed_hwfn *p_hwfn, u8 ll2_queue_type, u8 qid) { u8 stats_id; /* For legacy (RAM based) queues, the stats_id will be set as the * queue_id. Otherwise (context based queue), it will be set to * the "abs_pf_id" offset from the end of the RAM based queue IDs. * If the final value exceeds the total counters amount, return * INVALID value to indicate that the stats for this connection should * be disabled. */ if (ll2_queue_type == QED_LL2_RX_TYPE_LEGACY) stats_id = qid; else stats_id = MAX_NUM_LL2_RX_RAM_QUEUES + p_hwfn->abs_pf_id; if (stats_id < MAX_NUM_LL2_TX_STATS_COUNTERS) return stats_id; else return QED_LL2_INVALID_STATS_ID; } static void qed_ll2b_complete_tx_packet(void *cxt, u8 connection_handle, void *cookie, dma_addr_t first_frag_addr, bool b_last_fragment, bool b_last_packet) { struct qed_hwfn *p_hwfn = cxt; struct qed_dev *cdev = p_hwfn->cdev; struct sk_buff *skb = cookie; /* All we need to do is release the mapping */ dma_unmap_single(&p_hwfn->cdev->pdev->dev, first_frag_addr, skb_headlen(skb), DMA_TO_DEVICE); if (cdev->ll2->cbs && cdev->ll2->cbs->tx_cb) cdev->ll2->cbs->tx_cb(cdev->ll2->cb_cookie, skb, b_last_fragment); dev_kfree_skb_any(skb); } static int qed_ll2_alloc_buffer(struct qed_dev *cdev, u8 **data, dma_addr_t *phys_addr) { *data = kmalloc(cdev->ll2->rx_size, GFP_ATOMIC); if (!(*data)) { DP_INFO(cdev, "Failed to allocate LL2 buffer data\n"); return -ENOMEM; } *phys_addr = dma_map_single(&cdev->pdev->dev, ((*data) + NET_SKB_PAD), cdev->ll2->rx_size, DMA_FROM_DEVICE); if (dma_mapping_error(&cdev->pdev->dev, *phys_addr)) { DP_INFO(cdev, "Failed to map LL2 buffer data\n"); kfree((*data)); return -ENOMEM; } return 0; } static int qed_ll2_dealloc_buffer(struct qed_dev *cdev, struct qed_ll2_buffer *buffer) { spin_lock_bh(&cdev->ll2->lock); dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr, cdev->ll2->rx_size, DMA_FROM_DEVICE); kfree(buffer->data); list_del(&buffer->list); cdev->ll2->rx_cnt--; if (!cdev->ll2->rx_cnt) DP_INFO(cdev, "All LL2 entries were removed\n"); spin_unlock_bh(&cdev->ll2->lock); return 0; } static void qed_ll2_kill_buffers(struct qed_dev *cdev) { struct qed_ll2_buffer *buffer, *tmp_buffer; list_for_each_entry_safe(buffer, tmp_buffer, &cdev->ll2->list, list) qed_ll2_dealloc_buffer(cdev, buffer); } static void qed_ll2b_complete_rx_packet(void *cxt, struct qed_ll2_comp_rx_data *data) { struct qed_hwfn *p_hwfn = cxt; struct qed_ll2_buffer *buffer = data->cookie; struct qed_dev *cdev = p_hwfn->cdev; dma_addr_t new_phys_addr; struct sk_buff *skb; bool reuse = false; int rc = -EINVAL; u8 *new_data; DP_VERBOSE(p_hwfn, (NETIF_MSG_RX_STATUS | QED_MSG_STORAGE | NETIF_MSG_PKTDATA), "Got an LL2 Rx completion: [Buffer at phys 0x%llx, offset 0x%02x] Length 0x%04x Parse_flags 0x%04x vlan 0x%04x Opaque data [0x%08x:0x%08x]\n", (u64)data->rx_buf_addr, data->u.placement_offset, data->length.packet_length, data->parse_flags, data->vlan, data->opaque_data_0, data->opaque_data_1); if ((cdev->dp_module & NETIF_MSG_PKTDATA) && buffer->data) { print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET, 16, 1, buffer->data, data->length.packet_length, false); } /* Determine if data is valid */ if (data->length.packet_length < ETH_HLEN) reuse = true; /* Allocate a replacement for buffer; Reuse upon failure */ if (!reuse) rc = qed_ll2_alloc_buffer(p_hwfn->cdev, &new_data, &new_phys_addr); /* If need to reuse or there's no replacement buffer, repost this */ if (rc) goto out_post; dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr, cdev->ll2->rx_size, DMA_FROM_DEVICE); skb = slab_build_skb(buffer->data); if (!skb) { DP_INFO(cdev, "Failed to build SKB\n"); kfree(buffer->data); goto out_post1; } data->u.placement_offset += NET_SKB_PAD; skb_reserve(skb, data->u.placement_offset); skb_put(skb, data->length.packet_length); skb_checksum_none_assert(skb); /* Get parital ethernet information instead of eth_type_trans(), * Since we don't have an associated net_device. */ skb_reset_mac_header(skb); skb->protocol = eth_hdr(skb)->h_proto; /* Pass SKB onward */ if (cdev->ll2->cbs && cdev->ll2->cbs->rx_cb) { if (data->vlan) __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), data->vlan); cdev->ll2->cbs->rx_cb(cdev->ll2->cb_cookie, skb, data->opaque_data_0, data->opaque_data_1); } else { DP_VERBOSE(p_hwfn, (NETIF_MSG_RX_STATUS | NETIF_MSG_PKTDATA | QED_MSG_LL2 | QED_MSG_STORAGE), "Dropping the packet\n"); kfree(buffer->data); } out_post1: /* Update Buffer information and update FW producer */ buffer->data = new_data; buffer->phys_addr = new_phys_addr; out_post: rc = qed_ll2_post_rx_buffer(p_hwfn, cdev->ll2->handle, buffer->phys_addr, 0, buffer, 1); if (rc) qed_ll2_dealloc_buffer(cdev, buffer); } static struct qed_ll2_info *__qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn, u8 connection_handle, bool b_lock, bool b_only_active) { struct qed_ll2_info *p_ll2_conn, *p_ret = NULL; if (connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS) return NULL; if (!p_hwfn->p_ll2_info) return NULL; p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle]; if (b_only_active) { if (b_lock) mutex_lock(&p_ll2_conn->mutex); if (p_ll2_conn->b_active) p_ret = p_ll2_conn; if (b_lock) mutex_unlock(&p_ll2_conn->mutex); } else { p_ret = p_ll2_conn; } return p_ret; } static struct qed_ll2_info *qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn, u8 connection_handle) { return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, true); } static struct qed_ll2_info *qed_ll2_handle_sanity_lock(struct qed_hwfn *p_hwfn, u8 connection_handle) { return __qed_ll2_handle_sanity(p_hwfn, connection_handle, true, true); } static struct qed_ll2_info *qed_ll2_handle_sanity_inactive(struct qed_hwfn *p_hwfn, u8 connection_handle) { return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, false); } static void qed_ll2_txq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle) { bool b_last_packet = false, b_last_frag = false; struct qed_ll2_tx_packet *p_pkt = NULL; struct qed_ll2_info *p_ll2_conn; struct qed_ll2_tx_queue *p_tx; unsigned long flags = 0; dma_addr_t tx_frag; p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle); if (!p_ll2_conn) return; p_tx = &p_ll2_conn->tx_queue; spin_lock_irqsave(&p_tx->lock, flags); while (!list_empty(&p_tx->active_descq)) { p_pkt = list_first_entry(&p_tx->active_descq, struct qed_ll2_tx_packet, list_entry); if (!p_pkt) break; list_del(&p_pkt->list_entry); b_last_packet = list_empty(&p_tx->active_descq); list_add_tail(&p_pkt->list_entry, &p_tx->free_descq); spin_unlock_irqrestore(&p_tx->lock, flags); if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO) { struct qed_ooo_buffer *p_buffer; p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie; qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info, p_buffer); } else { p_tx->cur_completing_packet = *p_pkt; p_tx->cur_completing_bd_idx = 1; b_last_frag = p_tx->cur_completing_bd_idx == p_pkt->bd_used; tx_frag = p_pkt->bds_set[0].tx_frag; p_ll2_conn->cbs.tx_release_cb(p_ll2_conn->cbs.cookie, p_ll2_conn->my_id, p_pkt->cookie, tx_frag, b_last_frag, b_last_packet); } spin_lock_irqsave(&p_tx->lock, flags); } spin_unlock_irqrestore(&p_tx->lock, flags); } static int qed_ll2_txq_completion(struct qed_hwfn *p_hwfn, void *p_cookie) { struct qed_ll2_info *p_ll2_conn = p_cookie; struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue; u16 new_idx = 0, num_bds = 0, num_bds_in_packet = 0; struct qed_ll2_tx_packet *p_pkt; bool b_last_frag = false; unsigned long flags; int rc = -EINVAL; if (!p_ll2_conn) return rc; spin_lock_irqsave(&p_tx->lock, flags); if (p_tx->b_completing_packet) { rc = -EBUSY; goto out; } new_idx = le16_to_cpu(*p_tx->p_fw_cons); num_bds = ((s16)new_idx - (s16)p_tx->bds_idx); while (num_bds) { if (list_empty(&p_tx->active_descq)) goto out; p_pkt = list_first_entry(&p_tx->active_descq, struct qed_ll2_tx_packet, list_entry); if (!p_pkt) goto out; p_tx->b_completing_packet = true; p_tx->cur_completing_packet = *p_pkt; num_bds_in_packet = p_pkt->bd_used; list_del(&p_pkt->list_entry); if (unlikely(num_bds < num_bds_in_packet)) { DP_NOTICE(p_hwfn, "Rest of BDs does not cover whole packet\n"); goto out; } num_bds -= num_bds_in_packet; p_tx->bds_idx += num_bds_in_packet; while (num_bds_in_packet--) qed_chain_consume(&p_tx->txq_chain); p_tx->cur_completing_bd_idx = 1; b_last_frag = p_tx->cur_completing_bd_idx == p_pkt->bd_used; list_add_tail(&p_pkt->list_entry, &p_tx->free_descq); spin_unlock_irqrestore(&p_tx->lock, flags); p_ll2_conn->cbs.tx_comp_cb(p_ll2_conn->cbs.cookie, p_ll2_conn->my_id, p_pkt->cookie, p_pkt->bds_set[0].tx_frag, b_last_frag, !num_bds); spin_lock_irqsave(&p_tx->lock, flags); } p_tx->b_completing_packet = false; rc = 0; out: spin_unlock_irqrestore(&p_tx->lock, flags); return rc; } static void qed_ll2_rxq_parse_gsi(struct qed_hwfn *p_hwfn, union core_rx_cqe_union *p_cqe, struct qed_ll2_comp_rx_data *data) { data->parse_flags = le16_to_cpu(p_cqe->rx_cqe_gsi.parse_flags.flags); data->length.data_length = le16_to_cpu(p_cqe->rx_cqe_gsi.data_length); data->vlan = le16_to_cpu(p_cqe->rx_cqe_gsi.vlan); data->opaque_data_0 = le32_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrhi); data->opaque_data_1 = le16_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrlo); data->u.data_length_error = p_cqe->rx_cqe_gsi.data_length_error; data->qp_id = le16_to_cpu(p_cqe->rx_cqe_gsi.qp_id); data->src_qp = le32_to_cpu(p_cqe->rx_cqe_gsi.src_qp); } static void qed_ll2_rxq_parse_reg(struct qed_hwfn *p_hwfn, union core_rx_cqe_union *p_cqe, struct qed_ll2_comp_rx_data *data) { data->parse_flags = le16_to_cpu(p_cqe->rx_cqe_fp.parse_flags.flags); data->err_flags = le16_to_cpu(p_cqe->rx_cqe_fp.err_flags.flags); data->length.packet_length = le16_to_cpu(p_cqe->rx_cqe_fp.packet_length); data->vlan = le16_to_cpu(p_cqe->rx_cqe_fp.vlan); data->opaque_data_0 = le32_to_cpu(p_cqe->rx_cqe_fp.opaque_data.data[0]); data->opaque_data_1 = le32_to_cpu(p_cqe->rx_cqe_fp.opaque_data.data[1]); data->u.placement_offset = p_cqe->rx_cqe_fp.placement_offset; } static int qed_ll2_handle_slowpath(struct qed_hwfn *p_hwfn, struct qed_ll2_info *p_ll2_conn, union core_rx_cqe_union *p_cqe, unsigned long *p_lock_flags) { struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue; struct core_rx_slow_path_cqe *sp_cqe; sp_cqe = &p_cqe->rx_cqe_sp; if (sp_cqe->ramrod_cmd_id != CORE_RAMROD_RX_QUEUE_FLUSH) { DP_NOTICE(p_hwfn, "LL2 - unexpected Rx CQE slowpath ramrod_cmd_id:%d\n", sp_cqe->ramrod_cmd_id); return -EINVAL; } if (!p_ll2_conn->cbs.slowpath_cb) { DP_NOTICE(p_hwfn, "LL2 - received RX_QUEUE_FLUSH but no callback was provided\n"); return -EINVAL; } spin_unlock_irqrestore(&p_rx->lock, *p_lock_flags); p_ll2_conn->cbs.slowpath_cb(p_ll2_conn->cbs.cookie, p_ll2_conn->my_id, le32_to_cpu(sp_cqe->opaque_data.data[0]), le32_to_cpu(sp_cqe->opaque_data.data[1])); spin_lock_irqsave(&p_rx->lock, *p_lock_flags); return 0; } static int qed_ll2_rxq_handle_completion(struct qed_hwfn *p_hwfn, struct qed_ll2_info *p_ll2_conn, union core_rx_cqe_union *p_cqe, unsigned long *p_lock_flags, bool b_last_cqe) { struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue; struct qed_ll2_rx_packet *p_pkt = NULL; struct qed_ll2_comp_rx_data data; if (!list_empty(&p_rx->active_descq)) p_pkt = list_first_entry(&p_rx->active_descq, struct qed_ll2_rx_packet, list_entry); if (unlikely(!p_pkt)) { DP_NOTICE(p_hwfn, "[%d] LL2 Rx completion but active_descq is empty\n", p_ll2_conn->input.conn_type); return -EIO; } list_del(&p_pkt->list_entry); if (p_cqe->rx_cqe_sp.type == CORE_RX_CQE_TYPE_REGULAR) qed_ll2_rxq_parse_reg(p_hwfn, p_cqe, &data); else qed_ll2_rxq_parse_gsi(p_hwfn, p_cqe, &data); if (unlikely(qed_chain_consume(&p_rx->rxq_chain) != p_pkt->rxq_bd)) DP_NOTICE(p_hwfn, "Mismatch between active_descq and the LL2 Rx chain\n"); list_add_tail(&p_pkt->list_entry, &p_rx->free_descq); data.connection_handle = p_ll2_conn->my_id; data.cookie = p_pkt->cookie; data.rx_buf_addr = p_pkt->rx_buf_addr; data.b_last_packet = b_last_cqe; spin_unlock_irqrestore(&p_rx->lock, *p_lock_flags); p_ll2_conn->cbs.rx_comp_cb(p_ll2_conn->cbs.cookie, &data); spin_lock_irqsave(&p_rx->lock, *p_lock_flags); return 0; } static int qed_ll2_rxq_completion(struct qed_hwfn *p_hwfn, void *cookie) { struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)cookie; struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue; union core_rx_cqe_union *cqe = NULL; u16 cq_new_idx = 0, cq_old_idx = 0; unsigned long flags = 0; int rc = 0; if (!p_ll2_conn) return rc; spin_lock_irqsave(&p_rx->lock, flags); if (!QED_LL2_RX_REGISTERED(p_ll2_conn)) { spin_unlock_irqrestore(&p_rx->lock, flags); return 0; } cq_new_idx = le16_to_cpu(*p_rx->p_fw_cons); cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain); while (cq_new_idx != cq_old_idx) { bool b_last_cqe = (cq_new_idx == cq_old_idx); cqe = (union core_rx_cqe_union *) qed_chain_consume(&p_rx->rcq_chain); cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain); DP_VERBOSE(p_hwfn, QED_MSG_LL2, "LL2 [sw. cons %04x, fw. at %04x] - Got Packet of type %02x\n", cq_old_idx, cq_new_idx, cqe->rx_cqe_sp.type); switch (cqe->rx_cqe_sp.type) { case CORE_RX_CQE_TYPE_SLOW_PATH: rc = qed_ll2_handle_slowpath(p_hwfn, p_ll2_conn, cqe, &flags); break; case CORE_RX_CQE_TYPE_GSI_OFFLOAD: case CORE_RX_CQE_TYPE_REGULAR: rc = qed_ll2_rxq_handle_completion(p_hwfn, p_ll2_conn, cqe, &flags, b_last_cqe); break; default: rc = -EIO; } } spin_unlock_irqrestore(&p_rx->lock, flags); return rc; } static void qed_ll2_rxq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle) { struct qed_ll2_info *p_ll2_conn = NULL; struct qed_ll2_rx_packet *p_pkt = NULL; struct qed_ll2_rx_queue *p_rx; unsigned long flags = 0; p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle); if (!p_ll2_conn) return; p_rx = &p_ll2_conn->rx_queue; spin_lock_irqsave(&p_rx->lock, flags); while (!list_empty(&p_rx->active_descq)) { p_pkt = list_first_entry(&p_rx->active_descq, struct qed_ll2_rx_packet, list_entry); if (!p_pkt) break; list_move_tail(&p_pkt->list_entry, &p_rx->free_descq); spin_unlock_irqrestore(&p_rx->lock, flags); if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO) { struct qed_ooo_buffer *p_buffer; p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie; qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info, p_buffer); } else { dma_addr_t rx_buf_addr = p_pkt->rx_buf_addr; void *cookie = p_pkt->cookie; bool b_last; b_last = list_empty(&p_rx->active_descq); p_ll2_conn->cbs.rx_release_cb(p_ll2_conn->cbs.cookie, p_ll2_conn->my_id, cookie, rx_buf_addr, b_last); } spin_lock_irqsave(&p_rx->lock, flags); } spin_unlock_irqrestore(&p_rx->lock, flags); } static bool qed_ll2_lb_rxq_handler_slowpath(struct qed_hwfn *p_hwfn, struct core_rx_slow_path_cqe *p_cqe) { struct ooo_opaque *ooo_opq; u32 cid; if (p_cqe->ramrod_cmd_id != CORE_RAMROD_RX_QUEUE_FLUSH) return false; ooo_opq = (struct ooo_opaque *)&p_cqe->opaque_data; if (ooo_opq->ooo_opcode != TCP_EVENT_DELETE_ISLES) return false; /* Need to make a flush */ cid = le32_to_cpu(ooo_opq->cid); qed_ooo_release_connection_isles(p_hwfn, p_hwfn->p_ooo_info, cid); return true; } static int qed_ll2_lb_rxq_handler(struct qed_hwfn *p_hwfn, struct qed_ll2_info *p_ll2_conn) { struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue; u16 packet_length = 0, parse_flags = 0, vlan = 0; struct qed_ll2_rx_packet *p_pkt = NULL; u32 num_ooo_add_to_peninsula = 0, cid; union core_rx_cqe_union *cqe = NULL; u16 cq_new_idx = 0, cq_old_idx = 0; struct qed_ooo_buffer *p_buffer; struct ooo_opaque *ooo_opq; u8 placement_offset = 0; u8 cqe_type; cq_new_idx = le16_to_cpu(*p_rx->p_fw_cons); cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain); if (cq_new_idx == cq_old_idx) return 0; while (cq_new_idx != cq_old_idx) { struct core_rx_fast_path_cqe *p_cqe_fp; cqe = qed_chain_consume(&p_rx->rcq_chain); cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain); cqe_type = cqe->rx_cqe_sp.type; if (cqe_type == CORE_RX_CQE_TYPE_SLOW_PATH) if (qed_ll2_lb_rxq_handler_slowpath(p_hwfn, &cqe->rx_cqe_sp)) continue; if (unlikely(cqe_type != CORE_RX_CQE_TYPE_REGULAR)) { DP_NOTICE(p_hwfn, "Got a non-regular LB LL2 completion [type 0x%02x]\n", cqe_type); return -EINVAL; } p_cqe_fp = &cqe->rx_cqe_fp; placement_offset = p_cqe_fp->placement_offset; parse_flags = le16_to_cpu(p_cqe_fp->parse_flags.flags); packet_length = le16_to_cpu(p_cqe_fp->packet_length); vlan = le16_to_cpu(p_cqe_fp->vlan); ooo_opq = (struct ooo_opaque *)&p_cqe_fp->opaque_data; qed_ooo_save_history_entry(p_hwfn, p_hwfn->p_ooo_info, ooo_opq); cid = le32_to_cpu(ooo_opq->cid); /* Process delete isle first */ if (ooo_opq->drop_size) qed_ooo_delete_isles(p_hwfn, p_hwfn->p_ooo_info, cid, ooo_opq->drop_isle, ooo_opq->drop_size); if (ooo_opq->ooo_opcode == TCP_EVENT_NOP) continue; /* Now process create/add/join isles */ if (unlikely(list_empty(&p_rx->active_descq))) { DP_NOTICE(p_hwfn, "LL2 OOO RX chain has no submitted buffers\n" ); return -EIO; } p_pkt = list_first_entry(&p_rx->active_descq, struct qed_ll2_rx_packet, list_entry); if (likely(ooo_opq->ooo_opcode == TCP_EVENT_ADD_NEW_ISLE || ooo_opq->ooo_opcode == TCP_EVENT_ADD_ISLE_RIGHT || ooo_opq->ooo_opcode == TCP_EVENT_ADD_ISLE_LEFT || ooo_opq->ooo_opcode == TCP_EVENT_ADD_PEN || ooo_opq->ooo_opcode == TCP_EVENT_JOIN)) { if (unlikely(!p_pkt)) { DP_NOTICE(p_hwfn, "LL2 OOO RX packet is not valid\n"); return -EIO; } list_del(&p_pkt->list_entry); p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie; p_buffer->packet_length = packet_length; p_buffer->parse_flags = parse_flags; p_buffer->vlan = vlan; p_buffer->placement_offset = placement_offset; qed_chain_consume(&p_rx->rxq_chain); list_add_tail(&p_pkt->list_entry, &p_rx->free_descq); switch (ooo_opq->ooo_opcode) { case TCP_EVENT_ADD_NEW_ISLE: qed_ooo_add_new_isle(p_hwfn, p_hwfn->p_ooo_info, cid, ooo_opq->ooo_isle, p_buffer); break; case TCP_EVENT_ADD_ISLE_RIGHT: qed_ooo_add_new_buffer(p_hwfn, p_hwfn->p_ooo_info, cid, ooo_opq->ooo_isle, p_buffer, QED_OOO_RIGHT_BUF); break; case TCP_EVENT_ADD_ISLE_LEFT: qed_ooo_add_new_buffer(p_hwfn, p_hwfn->p_ooo_info, cid, ooo_opq->ooo_isle, p_buffer, QED_OOO_LEFT_BUF); break; case TCP_EVENT_JOIN: qed_ooo_add_new_buffer(p_hwfn, p_hwfn->p_ooo_info, cid, ooo_opq->ooo_isle + 1, p_buffer, QED_OOO_LEFT_BUF); qed_ooo_join_isles(p_hwfn, p_hwfn->p_ooo_info, cid, ooo_opq->ooo_isle); break; case TCP_EVENT_ADD_PEN: num_ooo_add_to_peninsula++; qed_ooo_put_ready_buffer(p_hwfn, p_hwfn->p_ooo_info, p_buffer, true); break; } } else { DP_NOTICE(p_hwfn, "Unexpected event (%d) TX OOO completion\n", ooo_opq->ooo_opcode); } } return 0; } static void qed_ooo_submit_tx_buffers(struct qed_hwfn *p_hwfn, struct qed_ll2_info *p_ll2_conn) { struct qed_ll2_tx_pkt_info tx_pkt; struct qed_ooo_buffer *p_buffer; u16 l4_hdr_offset_w; dma_addr_t first_frag; u8 bd_flags; int rc; /* Submit Tx buffers here */ while ((p_buffer = qed_ooo_get_ready_buffer(p_hwfn, p_hwfn->p_ooo_info))) { l4_hdr_offset_w = 0; bd_flags = 0; first_frag = p_buffer->rx_buffer_phys_addr + p_buffer->placement_offset; SET_FIELD(bd_flags, CORE_TX_BD_DATA_FORCE_VLAN_MODE, 1); SET_FIELD(bd_flags, CORE_TX_BD_DATA_L4_PROTOCOL, 1); memset(&tx_pkt, 0, sizeof(tx_pkt)); tx_pkt.num_of_bds = 1; tx_pkt.vlan = p_buffer->vlan; tx_pkt.bd_flags = bd_flags; tx_pkt.l4_hdr_offset_w = l4_hdr_offset_w; switch (p_ll2_conn->tx_dest) { case CORE_TX_DEST_NW: tx_pkt.tx_dest = QED_LL2_TX_DEST_NW; break; case CORE_TX_DEST_LB: tx_pkt.tx_dest = QED_LL2_TX_DEST_LB; break; case CORE_TX_DEST_DROP: default: tx_pkt.tx_dest = QED_LL2_TX_DEST_DROP; break; } tx_pkt.first_frag = first_frag; tx_pkt.first_frag_len = p_buffer->packet_length; tx_pkt.cookie = p_buffer; rc = qed_ll2_prepare_tx_packet(p_hwfn, p_ll2_conn->my_id, &tx_pkt, true); if (rc) { qed_ooo_put_ready_buffer(p_hwfn, p_hwfn->p_ooo_info, p_buffer, false); break; } } } static void qed_ooo_submit_rx_buffers(struct qed_hwfn *p_hwfn, struct qed_ll2_info *p_ll2_conn) { struct qed_ooo_buffer *p_buffer; int rc; while ((p_buffer = qed_ooo_get_free_buffer(p_hwfn, p_hwfn->p_ooo_info))) { rc = qed_ll2_post_rx_buffer(p_hwfn, p_ll2_conn->my_id, p_buffer->rx_buffer_phys_addr, 0, p_buffer, true); if (rc) { qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info, p_buffer); break; } } } static int qed_ll2_lb_rxq_completion(struct qed_hwfn *p_hwfn, void *p_cookie) { struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)p_cookie; int rc; if (!p_ll2_conn) return 0; if (!QED_LL2_RX_REGISTERED(p_ll2_conn)) return 0; rc = qed_ll2_lb_rxq_handler(p_hwfn, p_ll2_conn); if (rc) return rc; qed_ooo_submit_rx_buffers(p_hwfn, p_ll2_conn); qed_ooo_submit_tx_buffers(p_hwfn, p_ll2_conn); return 0; } static int qed_ll2_lb_txq_completion(struct qed_hwfn *p_hwfn, void *p_cookie) { struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)p_cookie; struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue; struct qed_ll2_tx_packet *p_pkt = NULL; struct qed_ooo_buffer *p_buffer; bool b_dont_submit_rx = false; u16 new_idx = 0, num_bds = 0; int rc; if (unlikely(!p_ll2_conn)) return 0; if (unlikely(!QED_LL2_TX_REGISTERED(p_ll2_conn))) return 0; new_idx = le16_to_cpu(*p_tx->p_fw_cons); num_bds = ((s16)new_idx - (s16)p_tx->bds_idx); if (unlikely(!num_bds)) return 0; while (num_bds) { if (list_empty(&p_tx->active_descq)) return -EINVAL; p_pkt = list_first_entry(&p_tx->active_descq, struct qed_ll2_tx_packet, list_entry); if (unlikely(!p_pkt)) return -EINVAL; if (unlikely(p_pkt->bd_used != 1)) { DP_NOTICE(p_hwfn, "Unexpectedly many BDs(%d) in TX OOO completion\n", p_pkt->bd_used); return -EINVAL; } list_del(&p_pkt->list_entry); num_bds--; p_tx->bds_idx++; qed_chain_consume(&p_tx->txq_chain); p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie; list_add_tail(&p_pkt->list_entry, &p_tx->free_descq); if (b_dont_submit_rx) { qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info, p_buffer); continue; } rc = qed_ll2_post_rx_buffer(p_hwfn, p_ll2_conn->my_id, p_buffer->rx_buffer_phys_addr, 0, p_buffer, true); if (rc != 0) { qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info, p_buffer); b_dont_submit_rx = true; } } qed_ooo_submit_tx_buffers(p_hwfn, p_ll2_conn); return 0; } static void qed_ll2_stop_ooo(struct qed_hwfn *p_hwfn) { u8 *handle = &p_hwfn->pf_params.iscsi_pf_params.ll2_ooo_queue_id; DP_VERBOSE(p_hwfn, (QED_MSG_STORAGE | QED_MSG_LL2), "Stopping LL2 OOO queue [%02x]\n", *handle); qed_ll2_terminate_connection(p_hwfn, *handle); qed_ll2_release_connection(p_hwfn, *handle); *handle = QED_LL2_UNUSED_HANDLE; } static int qed_sp_ll2_rx_queue_start(struct qed_hwfn *p_hwfn, struct qed_ll2_info *p_ll2_conn, u8 action_on_error) { enum qed_ll2_conn_type conn_type = p_ll2_conn->input.conn_type; struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue; struct core_rx_start_ramrod_data *p_ramrod = NULL; struct qed_spq_entry *p_ent = NULL; struct qed_sp_init_data init_data; u16 cqe_pbl_size; int rc = 0; /* Get SPQ entry */ memset(&init_data, 0, sizeof(init_data)); init_data.cid = p_ll2_conn->cid; init_data.opaque_fid = p_hwfn->hw_info.opaque_fid; init_data.comp_mode = QED_SPQ_MODE_EBLOCK; rc = qed_sp_init_request(p_hwfn, &p_ent, CORE_RAMROD_RX_QUEUE_START, PROTOCOLID_CORE, &init_data); if (rc) return rc; p_ramrod = &p_ent->ramrod.core_rx_queue_start; memset(p_ramrod, 0, sizeof(*p_ramrod)); p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn)); p_ramrod->sb_index = p_rx->rx_sb_index; p_ramrod->complete_event_flg = 1; p_ramrod->mtu = cpu_to_le16(p_ll2_conn->input.mtu); DMA_REGPAIR_LE(p_ramrod->bd_base, p_rx->rxq_chain.p_phys_addr); cqe_pbl_size = (u16)qed_chain_get_page_cnt(&p_rx->rcq_chain); p_ramrod->num_of_pbl_pages = cpu_to_le16(cqe_pbl_size); DMA_REGPAIR_LE(p_ramrod->cqe_pbl_addr, qed_chain_get_pbl_phys(&p_rx->rcq_chain)); p_ramrod->drop_ttl0_flg = p_ll2_conn->input.rx_drop_ttl0_flg; p_ramrod->inner_vlan_stripping_en = p_ll2_conn->input.rx_vlan_removal_en; if (test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits) && p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE) p_ramrod->report_outer_vlan = 1; p_ramrod->queue_id = p_ll2_conn->queue_id; p_ramrod->main_func_queue = p_ll2_conn->main_func_queue ? 1 : 0; if (test_bit(QED_MF_LL2_NON_UNICAST, &p_hwfn->cdev->mf_bits) && p_ramrod->main_func_queue && conn_type != QED_LL2_TYPE_ROCE && conn_type != QED_LL2_TYPE_IWARP && (!QED_IS_NVMETCP_PERSONALITY(p_hwfn))) { p_ramrod->mf_si_bcast_accept_all = 1; p_ramrod->mf_si_mcast_accept_all = 1; } else { p_ramrod->mf_si_bcast_accept_all = 0; p_ramrod->mf_si_mcast_accept_all = 0; } p_ramrod->action_on_error.error_type = action_on_error; p_ramrod->gsi_offload_flag = p_ll2_conn->input.gsi_enable; p_ramrod->zero_prod_flg = 1; return qed_spq_post(p_hwfn, p_ent, NULL); } static int qed_sp_ll2_tx_queue_start(struct qed_hwfn *p_hwfn, struct qed_ll2_info *p_ll2_conn) { enum qed_ll2_conn_type conn_type = p_ll2_conn->input.conn_type; struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue; struct core_tx_start_ramrod_data *p_ramrod = NULL; struct qed_spq_entry *p_ent = NULL; struct qed_sp_init_data init_data; u16 pq_id = 0, pbl_size; int rc = -EINVAL; if (!QED_LL2_TX_REGISTERED(p_ll2_conn)) return 0; if (likely(p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO)) p_ll2_conn->tx_stats_en = 0; else p_ll2_conn->tx_stats_en = 1; /* Get SPQ entry */ memset(&init_data, 0, sizeof(init_data)); init_data.cid = p_ll2_conn->cid; init_data.opaque_fid = p_hwfn->hw_info.opaque_fid; init_data.comp_mode = QED_SPQ_MODE_EBLOCK; rc = qed_sp_init_request(p_hwfn, &p_ent, CORE_RAMROD_TX_QUEUE_START, PROTOCOLID_CORE, &init_data); if (rc) return rc; p_ramrod = &p_ent->ramrod.core_tx_queue_start; p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn)); p_ramrod->sb_index = p_tx->tx_sb_index; p_ramrod->mtu = cpu_to_le16(p_ll2_conn->input.mtu); p_ramrod->stats_en = p_ll2_conn->tx_stats_en; p_ramrod->stats_id = p_ll2_conn->tx_stats_id; DMA_REGPAIR_LE(p_ramrod->pbl_base_addr, qed_chain_get_pbl_phys(&p_tx->txq_chain)); pbl_size = qed_chain_get_page_cnt(&p_tx->txq_chain); p_ramrod->pbl_size = cpu_to_le16(pbl_size); switch (p_ll2_conn->input.tx_tc) { case PURE_LB_TC: pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_LB); break; case PKT_LB_TC: pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OOO); break; default: pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD); break; } p_ramrod->qm_pq_id = cpu_to_le16(pq_id); switch (conn_type) { case QED_LL2_TYPE_FCOE: p_ramrod->conn_type = PROTOCOLID_FCOE; break; case QED_LL2_TYPE_TCP_ULP: p_ramrod->conn_type = PROTOCOLID_TCP_ULP; break; case QED_LL2_TYPE_ROCE: p_ramrod->conn_type = PROTOCOLID_ROCE; break; case QED_LL2_TYPE_IWARP: p_ramrod->conn_type = PROTOCOLID_IWARP; break; case QED_LL2_TYPE_OOO: if (p_hwfn->hw_info.personality == QED_PCI_ISCSI || p_hwfn->hw_info.personality == QED_PCI_NVMETCP) p_ramrod->conn_type = PROTOCOLID_TCP_ULP; else p_ramrod->conn_type = PROTOCOLID_IWARP; break; default: p_ramrod->conn_type = PROTOCOLID_ETH; DP_NOTICE(p_hwfn, "Unknown connection type: %d\n", conn_type); } p_ramrod->gsi_offload_flag = p_ll2_conn->input.gsi_enable; rc = qed_spq_post(p_hwfn, p_ent, NULL); if (rc) return rc; rc = qed_db_recovery_add(p_hwfn->cdev, p_tx->doorbell_addr, &p_tx->db_msg, DB_REC_WIDTH_32B, DB_REC_KERNEL); return rc; } static int qed_sp_ll2_rx_queue_stop(struct qed_hwfn *p_hwfn, struct qed_ll2_info *p_ll2_conn) { struct core_rx_stop_ramrod_data *p_ramrod = NULL; struct qed_spq_entry *p_ent = NULL; struct qed_sp_init_data init_data; int rc = -EINVAL; /* Get SPQ entry */ memset(&init_data, 0, sizeof(init_data)); init_data.cid = p_ll2_conn->cid; init_data.opaque_fid = p_hwfn->hw_info.opaque_fid; init_data.comp_mode = QED_SPQ_MODE_EBLOCK; rc = qed_sp_init_request(p_hwfn, &p_ent, CORE_RAMROD_RX_QUEUE_STOP, PROTOCOLID_CORE, &init_data); if (rc) return rc; p_ramrod = &p_ent->ramrod.core_rx_queue_stop; p_ramrod->complete_event_flg = 1; p_ramrod->queue_id = p_ll2_conn->queue_id; return qed_spq_post(p_hwfn, p_ent, NULL); } static int qed_sp_ll2_tx_queue_stop(struct qed_hwfn *p_hwfn, struct qed_ll2_info *p_ll2_conn) { struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue; struct qed_spq_entry *p_ent = NULL; struct qed_sp_init_data init_data; int rc = -EINVAL; qed_db_recovery_del(p_hwfn->cdev, p_tx->doorbell_addr, &p_tx->db_msg); /* Get SPQ entry */ memset(&init_data, 0, sizeof(init_data)); init_data.cid = p_ll2_conn->cid; init_data.opaque_fid = p_hwfn->hw_info.opaque_fid; init_data.comp_mode = QED_SPQ_MODE_EBLOCK; rc = qed_sp_init_request(p_hwfn, &p_ent, CORE_RAMROD_TX_QUEUE_STOP, PROTOCOLID_CORE, &init_data); if (rc) return rc; return qed_spq_post(p_hwfn, p_ent, NULL); } static int qed_ll2_acquire_connection_rx(struct qed_hwfn *p_hwfn, struct qed_ll2_info *p_ll2_info) { struct qed_chain_init_params params = { .intended_use = QED_CHAIN_USE_TO_CONSUME_PRODUCE, .cnt_type = QED_CHAIN_CNT_TYPE_U16, .num_elems = p_ll2_info->input.rx_num_desc, }; struct qed_dev *cdev = p_hwfn->cdev; struct qed_ll2_rx_packet *p_descq; u32 capacity; int rc = 0; if (!p_ll2_info->input.rx_num_desc) goto out; params.mode = QED_CHAIN_MODE_NEXT_PTR; params.elem_size = sizeof(struct core_rx_bd); rc = qed_chain_alloc(cdev, &p_ll2_info->rx_queue.rxq_chain, ¶ms); if (rc) { DP_NOTICE(p_hwfn, "Failed to allocate ll2 rxq chain\n"); goto out; } capacity = qed_chain_get_capacity(&p_ll2_info->rx_queue.rxq_chain); p_descq = kcalloc(capacity, sizeof(struct qed_ll2_rx_packet), GFP_KERNEL); if (!p_descq) { rc = -ENOMEM; DP_NOTICE(p_hwfn, "Failed to allocate ll2 Rx desc\n"); goto out; } p_ll2_info->rx_queue.descq_array = p_descq; params.mode = QED_CHAIN_MODE_PBL; params.elem_size = sizeof(struct core_rx_fast_path_cqe); rc = qed_chain_alloc(cdev, &p_ll2_info->rx_queue.rcq_chain, ¶ms); if (rc) { DP_NOTICE(p_hwfn, "Failed to allocate ll2 rcq chain\n"); goto out; } DP_VERBOSE(p_hwfn, QED_MSG_LL2, "Allocated LL2 Rxq [Type %08x] with 0x%08x buffers\n", p_ll2_info->input.conn_type, p_ll2_info->input.rx_num_desc); out: return rc; } static int qed_ll2_acquire_connection_tx(struct qed_hwfn *p_hwfn, struct qed_ll2_info *p_ll2_info) { struct qed_chain_init_params params = { .mode = QED_CHAIN_MODE_PBL, .intended_use = QED_CHAIN_USE_TO_CONSUME_PRODUCE, .cnt_type = QED_CHAIN_CNT_TYPE_U16, .num_elems = p_ll2_info->input.tx_num_desc, .elem_size = sizeof(struct core_tx_bd), }; struct qed_ll2_tx_packet *p_descq; size_t desc_size; u32 capacity; int rc = 0; if (!p_ll2_info->input.tx_num_desc) goto out; rc = qed_chain_alloc(p_hwfn->cdev, &p_ll2_info->tx_queue.txq_chain, ¶ms); if (rc) goto out; capacity = qed_chain_get_capacity(&p_ll2_info->tx_queue.txq_chain); /* All bds_set elements are flexibily added. */ desc_size = struct_size(p_descq, bds_set, p_ll2_info->input.tx_max_bds_per_packet); p_descq = kcalloc(capacity, desc_size, GFP_KERNEL); if (!p_descq) { rc = -ENOMEM; goto out; } p_ll2_info->tx_queue.descq_mem = p_descq; DP_VERBOSE(p_hwfn, QED_MSG_LL2, "Allocated LL2 Txq [Type %08x] with 0x%08x buffers\n", p_ll2_info->input.conn_type, p_ll2_info->input.tx_num_desc); out: if (rc) DP_NOTICE(p_hwfn, "Can't allocate memory for Tx LL2 with 0x%08x buffers\n", p_ll2_info->input.tx_num_desc); return rc; } static int qed_ll2_acquire_connection_ooo(struct qed_hwfn *p_hwfn, struct qed_ll2_info *p_ll2_info, u16 mtu) { struct qed_ooo_buffer *p_buf = NULL; void *p_virt; u16 buf_idx; int rc = 0; if (p_ll2_info->input.conn_type != QED_LL2_TYPE_OOO) return rc; /* Correct number of requested OOO buffers if needed */ if (!p_ll2_info->input.rx_num_ooo_buffers) { u16 num_desc = p_ll2_info->input.rx_num_desc; if (!num_desc) return -EINVAL; p_ll2_info->input.rx_num_ooo_buffers = num_desc * 2; } for (buf_idx = 0; buf_idx < p_ll2_info->input.rx_num_ooo_buffers; buf_idx++) { p_buf = kzalloc(sizeof(*p_buf), GFP_KERNEL); if (!p_buf) { rc = -ENOMEM; goto out; } p_buf->rx_buffer_size = mtu + 26 + ETH_CACHE_LINE_SIZE; p_buf->rx_buffer_size = (p_buf->rx_buffer_size + ETH_CACHE_LINE_SIZE - 1) & ~(ETH_CACHE_LINE_SIZE - 1); p_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev, p_buf->rx_buffer_size, &p_buf->rx_buffer_phys_addr, GFP_KERNEL); if (!p_virt) { kfree(p_buf); rc = -ENOMEM; goto out; } p_buf->rx_buffer_virt_addr = p_virt; qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info, p_buf); } DP_VERBOSE(p_hwfn, QED_MSG_LL2, "Allocated [%04x] LL2 OOO buffers [each of size 0x%08x]\n", p_ll2_info->input.rx_num_ooo_buffers, p_buf->rx_buffer_size); out: return rc; } static int qed_ll2_set_cbs(struct qed_ll2_info *p_ll2_info, const struct qed_ll2_cbs *cbs) { if (!cbs || (!cbs->rx_comp_cb || !cbs->rx_release_cb || !cbs->tx_comp_cb || !cbs->tx_release_cb || !cbs->cookie)) return -EINVAL; p_ll2_info->cbs.rx_comp_cb = cbs->rx_comp_cb; p_ll2_info->cbs.rx_release_cb = cbs->rx_release_cb; p_ll2_info->cbs.tx_comp_cb = cbs->tx_comp_cb; p_ll2_info->cbs.tx_release_cb = cbs->tx_release_cb; p_ll2_info->cbs.slowpath_cb = cbs->slowpath_cb; p_ll2_info->cbs.cookie = cbs->cookie; return 0; } static void _qed_ll2_calc_allowed_conns(struct qed_hwfn *p_hwfn, struct qed_ll2_acquire_data *data, u8 *start_idx, u8 *last_idx) { /* LL2 queues handles will be split as follows: * First will be the legacy queues, and then the ctx based. */ if (data->input.rx_conn_type == QED_LL2_RX_TYPE_LEGACY) { *start_idx = QED_LL2_LEGACY_CONN_BASE_PF; *last_idx = *start_idx + QED_MAX_NUM_OF_LEGACY_LL2_CONNS_PF; } else { /* QED_LL2_RX_TYPE_CTX */ *start_idx = QED_LL2_CTX_CONN_BASE_PF; *last_idx = *start_idx + QED_MAX_NUM_OF_CTX_LL2_CONNS_PF; } } static enum core_error_handle qed_ll2_get_error_choice(enum qed_ll2_error_handle err) { switch (err) { case QED_LL2_DROP_PACKET: return LL2_DROP_PACKET; case QED_LL2_DO_NOTHING: return LL2_DO_NOTHING; case QED_LL2_ASSERT: return LL2_ASSERT; default: return LL2_DO_NOTHING; } } int qed_ll2_acquire_connection(void *cxt, struct qed_ll2_acquire_data *data) { struct qed_hwfn *p_hwfn = cxt; qed_int_comp_cb_t comp_rx_cb, comp_tx_cb; struct qed_ll2_info *p_ll2_info = NULL; u8 i, first_idx, last_idx, *p_tx_max; int rc; if (!data->p_connection_handle || !p_hwfn->p_ll2_info) return -EINVAL; _qed_ll2_calc_allowed_conns(p_hwfn, data, &first_idx, &last_idx); /* Find a free connection to be used */ for (i = first_idx; i < last_idx; i++) { mutex_lock(&p_hwfn->p_ll2_info[i].mutex); if (p_hwfn->p_ll2_info[i].b_active) { mutex_unlock(&p_hwfn->p_ll2_info[i].mutex); continue; } p_hwfn->p_ll2_info[i].b_active = true; p_ll2_info = &p_hwfn->p_ll2_info[i]; mutex_unlock(&p_hwfn->p_ll2_info[i].mutex); break; } if (!p_ll2_info) return -EBUSY; memcpy(&p_ll2_info->input, &data->input, sizeof(p_ll2_info->input)); switch (data->input.tx_dest) { case QED_LL2_TX_DEST_NW: p_ll2_info->tx_dest = CORE_TX_DEST_NW; break; case QED_LL2_TX_DEST_LB: p_ll2_info->tx_dest = CORE_TX_DEST_LB; break; case QED_LL2_TX_DEST_DROP: p_ll2_info->tx_dest = CORE_TX_DEST_DROP; break; default: return -EINVAL; } if (data->input.conn_type == QED_LL2_TYPE_OOO || data->input.secondary_queue) p_ll2_info->main_func_queue = false; else p_ll2_info->main_func_queue = true; /* Correct maximum number of Tx BDs */ p_tx_max = &p_ll2_info->input.tx_max_bds_per_packet; if (*p_tx_max == 0) *p_tx_max = CORE_LL2_TX_MAX_BDS_PER_PACKET; else *p_tx_max = min_t(u8, *p_tx_max, CORE_LL2_TX_MAX_BDS_PER_PACKET); rc = qed_ll2_set_cbs(p_ll2_info, data->cbs); if (rc) { DP_NOTICE(p_hwfn, "Invalid callback functions\n"); goto q_allocate_fail; } rc = qed_ll2_acquire_connection_rx(p_hwfn, p_ll2_info); if (rc) goto q_allocate_fail; rc = qed_ll2_acquire_connection_tx(p_hwfn, p_ll2_info); if (rc) goto q_allocate_fail; rc = qed_ll2_acquire_connection_ooo(p_hwfn, p_ll2_info, data->input.mtu); if (rc) goto q_allocate_fail; /* Register callbacks for the Rx/Tx queues */ if (data->input.conn_type == QED_LL2_TYPE_OOO) { comp_rx_cb = qed_ll2_lb_rxq_completion; comp_tx_cb = qed_ll2_lb_txq_completion; } else { comp_rx_cb = qed_ll2_rxq_completion; comp_tx_cb = qed_ll2_txq_completion; } if (data->input.rx_num_desc) { qed_int_register_cb(p_hwfn, comp_rx_cb, &p_hwfn->p_ll2_info[i], &p_ll2_info->rx_queue.rx_sb_index, &p_ll2_info->rx_queue.p_fw_cons); p_ll2_info->rx_queue.b_cb_registered = true; } if (data->input.tx_num_desc) { qed_int_register_cb(p_hwfn, comp_tx_cb, &p_hwfn->p_ll2_info[i], &p_ll2_info->tx_queue.tx_sb_index, &p_ll2_info->tx_queue.p_fw_cons); p_ll2_info->tx_queue.b_cb_registered = true; } *data->p_connection_handle = i; return rc; q_allocate_fail: qed_ll2_release_connection(p_hwfn, i); return -ENOMEM; } static int qed_ll2_establish_connection_rx(struct qed_hwfn *p_hwfn, struct qed_ll2_info *p_ll2_conn) { enum qed_ll2_error_handle error_input; enum core_error_handle error_mode; u8 action_on_error = 0; int rc; if (!QED_LL2_RX_REGISTERED(p_ll2_conn)) return 0; DIRECT_REG_WR(p_ll2_conn->rx_queue.set_prod_addr, 0x0); error_input = p_ll2_conn->input.ai_err_packet_too_big; error_mode = qed_ll2_get_error_choice(error_input); SET_FIELD(action_on_error, CORE_RX_ACTION_ON_ERROR_PACKET_TOO_BIG, error_mode); error_input = p_ll2_conn->input.ai_err_no_buf; error_mode = qed_ll2_get_error_choice(error_input); SET_FIELD(action_on_error, CORE_RX_ACTION_ON_ERROR_NO_BUFF, error_mode); rc = qed_sp_ll2_rx_queue_start(p_hwfn, p_ll2_conn, action_on_error); if (rc) return rc; if (p_ll2_conn->rx_queue.ctx_based) { rc = qed_db_recovery_add(p_hwfn->cdev, p_ll2_conn->rx_queue.set_prod_addr, &p_ll2_conn->rx_queue.db_data, DB_REC_WIDTH_64B, DB_REC_KERNEL); } return rc; } static void qed_ll2_establish_connection_ooo(struct qed_hwfn *p_hwfn, struct qed_ll2_info *p_ll2_conn) { if (p_ll2_conn->input.conn_type != QED_LL2_TYPE_OOO) return; qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info); qed_ooo_submit_rx_buffers(p_hwfn, p_ll2_conn); } static inline u8 qed_ll2_handle_to_queue_id(struct qed_hwfn *p_hwfn, u8 handle, u8 ll2_queue_type) { u8 qid; if (ll2_queue_type == QED_LL2_RX_TYPE_LEGACY) return p_hwfn->hw_info.resc_start[QED_LL2_RAM_QUEUE] + handle; /* QED_LL2_RX_TYPE_CTX * FW distinguishes between the legacy queues (ram based) and the * ctx based queues by the queue_id. * The first MAX_NUM_LL2_RX_RAM_QUEUES queues are legacy * and the queue ids above that are ctx base. */ qid = p_hwfn->hw_info.resc_start[QED_LL2_CTX_QUEUE] + MAX_NUM_LL2_RX_RAM_QUEUES; /* See comment on the acquire connection for how the ll2 * queues handles are divided. */ qid += (handle - QED_MAX_NUM_OF_LEGACY_LL2_CONNS_PF); return qid; } int qed_ll2_establish_connection(void *cxt, u8 connection_handle) { struct core_conn_context *p_cxt; struct qed_ll2_tx_packet *p_pkt; struct qed_ll2_info *p_ll2_conn; struct qed_hwfn *p_hwfn = cxt; struct qed_ll2_rx_queue *p_rx; struct qed_ll2_tx_queue *p_tx; struct qed_cxt_info cxt_info; struct qed_ptt *p_ptt; int rc = -EINVAL; u32 i, capacity; size_t desc_size; u8 qid, stats_id; p_ptt = qed_ptt_acquire(p_hwfn); if (!p_ptt) return -EAGAIN; p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle); if (!p_ll2_conn) { rc = -EINVAL; goto out; } p_rx = &p_ll2_conn->rx_queue; p_tx = &p_ll2_conn->tx_queue; qed_chain_reset(&p_rx->rxq_chain); qed_chain_reset(&p_rx->rcq_chain); INIT_LIST_HEAD(&p_rx->active_descq); INIT_LIST_HEAD(&p_rx->free_descq); INIT_LIST_HEAD(&p_rx->posting_descq); spin_lock_init(&p_rx->lock); capacity = qed_chain_get_capacity(&p_rx->rxq_chain); for (i = 0; i < capacity; i++) list_add_tail(&p_rx->descq_array[i].list_entry, &p_rx->free_descq); *p_rx->p_fw_cons = 0; qed_chain_reset(&p_tx->txq_chain); INIT_LIST_HEAD(&p_tx->active_descq); INIT_LIST_HEAD(&p_tx->free_descq); INIT_LIST_HEAD(&p_tx->sending_descq); spin_lock_init(&p_tx->lock); capacity = qed_chain_get_capacity(&p_tx->txq_chain); /* All bds_set elements are flexibily added. */ desc_size = struct_size(p_pkt, bds_set, p_ll2_conn->input.tx_max_bds_per_packet); for (i = 0; i < capacity; i++) { p_pkt = p_tx->descq_mem + desc_size * i; list_add_tail(&p_pkt->list_entry, &p_tx->free_descq); } p_tx->cur_completing_bd_idx = 0; p_tx->bds_idx = 0; p_tx->b_completing_packet = false; p_tx->cur_send_packet = NULL; p_tx->cur_send_frag_num = 0; p_tx->cur_completing_frag_num = 0; *p_tx->p_fw_cons = 0; rc = qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_ll2_conn->cid); if (rc) goto out; cxt_info.iid = p_ll2_conn->cid; rc = qed_cxt_get_cid_info(p_hwfn, &cxt_info); if (rc) { DP_NOTICE(p_hwfn, "Cannot find context info for cid=%d\n", p_ll2_conn->cid); goto out; } p_cxt = cxt_info.p_cxt; memset(p_cxt, 0, sizeof(*p_cxt)); qid = qed_ll2_handle_to_queue_id(p_hwfn, connection_handle, p_ll2_conn->input.rx_conn_type); stats_id = qed_ll2_handle_to_stats_id(p_hwfn, p_ll2_conn->input.rx_conn_type, qid); p_ll2_conn->queue_id = qid; p_ll2_conn->tx_stats_id = stats_id; /* If there is no valid stats id for this connection, disable stats */ if (p_ll2_conn->tx_stats_id == QED_LL2_INVALID_STATS_ID) { p_ll2_conn->tx_stats_en = 0; DP_VERBOSE(p_hwfn, QED_MSG_LL2, "Disabling stats for queue %d - not enough counters\n", qid); } DP_VERBOSE(p_hwfn, QED_MSG_LL2, "Establishing ll2 queue. PF %d ctx_based=%d abs qid=%d stats_id=%d\n", p_hwfn->rel_pf_id, p_ll2_conn->input.rx_conn_type, qid, stats_id); if (p_ll2_conn->input.rx_conn_type == QED_LL2_RX_TYPE_LEGACY) { p_rx->set_prod_addr = (u8 __iomem *)p_hwfn->regview + GET_GTT_REG_ADDR(GTT_BAR0_MAP_REG_TSDM_RAM, TSTORM_LL2_RX_PRODS, qid); } else { /* QED_LL2_RX_TYPE_CTX - using doorbell */ p_rx->ctx_based = 1; p_rx->set_prod_addr = p_hwfn->doorbells + p_hwfn->dpi_start_offset + DB_ADDR_SHIFT(DQ_PWM_OFFSET_TCM_LL2_PROD_UPDATE); /* prepare db data */ p_rx->db_data.icid = cpu_to_le16((u16)p_ll2_conn->cid); SET_FIELD(p_rx->db_data.params, CORE_PWM_PROD_UPDATE_DATA_AGG_CMD, DB_AGG_CMD_SET); SET_FIELD(p_rx->db_data.params, CORE_PWM_PROD_UPDATE_DATA_RESERVED1, 0); } p_tx->doorbell_addr = (u8 __iomem *)p_hwfn->doorbells + qed_db_addr(p_ll2_conn->cid, DQ_DEMS_LEGACY); /* prepare db data */ SET_FIELD(p_tx->db_msg.params, CORE_DB_DATA_DEST, DB_DEST_XCM); SET_FIELD(p_tx->db_msg.params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_SET); SET_FIELD(p_tx->db_msg.params, CORE_DB_DATA_AGG_VAL_SEL, DQ_XCM_CORE_TX_BD_PROD_CMD); p_tx->db_msg.agg_flags = DQ_XCM_CORE_DQ_CF_CMD; rc = qed_ll2_establish_connection_rx(p_hwfn, p_ll2_conn); if (rc) goto out; rc = qed_sp_ll2_tx_queue_start(p_hwfn, p_ll2_conn); if (rc) goto out; if (!QED_IS_RDMA_PERSONALITY(p_hwfn) && !QED_IS_NVMETCP_PERSONALITY(p_hwfn)) qed_wr(p_hwfn, p_ptt, PRS_REG_USE_LIGHT_L2, 1); qed_ll2_establish_connection_ooo(p_hwfn, p_ll2_conn); if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE) { if (!test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits)) qed_llh_add_protocol_filter(p_hwfn->cdev, 0, QED_LLH_FILTER_ETHERTYPE, ETH_P_FCOE, 0); qed_llh_add_protocol_filter(p_hwfn->cdev, 0, QED_LLH_FILTER_ETHERTYPE, ETH_P_FIP, 0); } out: qed_ptt_release(p_hwfn, p_ptt); return rc; } static void qed_ll2_post_rx_buffer_notify_fw(struct qed_hwfn *p_hwfn, struct qed_ll2_rx_queue *p_rx, struct qed_ll2_rx_packet *p_curp) { struct qed_ll2_rx_packet *p_posting_packet = NULL; struct core_ll2_rx_prod rx_prod = { 0, 0 }; bool b_notify_fw = false; u16 bd_prod, cq_prod; /* This handles the flushing of already posted buffers */ while (!list_empty(&p_rx->posting_descq)) { p_posting_packet = list_first_entry(&p_rx->posting_descq, struct qed_ll2_rx_packet, list_entry); list_move_tail(&p_posting_packet->list_entry, &p_rx->active_descq); b_notify_fw = true; } /* This handles the supplied packet [if there is one] */ if (p_curp) { list_add_tail(&p_curp->list_entry, &p_rx->active_descq); b_notify_fw = true; } if (!b_notify_fw) return; bd_prod = qed_chain_get_prod_idx(&p_rx->rxq_chain); cq_prod = qed_chain_get_prod_idx(&p_rx->rcq_chain); if (p_rx->ctx_based) { /* update producer by giving a doorbell */ p_rx->db_data.prod.bd_prod = cpu_to_le16(bd_prod); p_rx->db_data.prod.cqe_prod = cpu_to_le16(cq_prod); /* Make sure chain element is updated before ringing the * doorbell */ dma_wmb(); DIRECT_REG_WR64(p_rx->set_prod_addr, *((u64 *)&p_rx->db_data)); } else { rx_prod.bd_prod = cpu_to_le16(bd_prod); rx_prod.cqe_prod = cpu_to_le16(cq_prod); /* Make sure chain element is updated before ringing the * doorbell */ dma_wmb(); DIRECT_REG_WR(p_rx->set_prod_addr, *((u32 *)&rx_prod)); } } int qed_ll2_post_rx_buffer(void *cxt, u8 connection_handle, dma_addr_t addr, u16 buf_len, void *cookie, u8 notify_fw) { struct qed_hwfn *p_hwfn = cxt; struct core_rx_bd_with_buff_len *p_curb = NULL; struct qed_ll2_rx_packet *p_curp = NULL; struct qed_ll2_info *p_ll2_conn; struct qed_ll2_rx_queue *p_rx; unsigned long flags; void *p_data; int rc = 0; p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle); if (!p_ll2_conn) return -EINVAL; p_rx = &p_ll2_conn->rx_queue; if (!p_rx->set_prod_addr) return -EIO; spin_lock_irqsave(&p_rx->lock, flags); if (!list_empty(&p_rx->free_descq)) p_curp = list_first_entry(&p_rx->free_descq, struct qed_ll2_rx_packet, list_entry); if (p_curp) { if (qed_chain_get_elem_left(&p_rx->rxq_chain) && qed_chain_get_elem_left(&p_rx->rcq_chain)) { p_data = qed_chain_produce(&p_rx->rxq_chain); p_curb = (struct core_rx_bd_with_buff_len *)p_data; qed_chain_produce(&p_rx->rcq_chain); } } /* If we're lacking entries, let's try to flush buffers to FW */ if (!p_curp || !p_curb) { rc = -EBUSY; p_curp = NULL; goto out_notify; } /* We have an Rx packet we can fill */ DMA_REGPAIR_LE(p_curb->addr, addr); p_curb->buff_length = cpu_to_le16(buf_len); p_curp->rx_buf_addr = addr; p_curp->cookie = cookie; p_curp->rxq_bd = p_curb; p_curp->buf_length = buf_len; list_del(&p_curp->list_entry); /* Check if we only want to enqueue this packet without informing FW */ if (!notify_fw) { list_add_tail(&p_curp->list_entry, &p_rx->posting_descq); goto out; } out_notify: qed_ll2_post_rx_buffer_notify_fw(p_hwfn, p_rx, p_curp); out: spin_unlock_irqrestore(&p_rx->lock, flags); return rc; } static void qed_ll2_prepare_tx_packet_set(struct qed_hwfn *p_hwfn, struct qed_ll2_tx_queue *p_tx, struct qed_ll2_tx_packet *p_curp, struct qed_ll2_tx_pkt_info *pkt, u8 notify_fw) { list_del(&p_curp->list_entry); p_curp->cookie = pkt->cookie; p_curp->bd_used = pkt->num_of_bds; p_curp->notify_fw = notify_fw; p_tx->cur_send_packet = p_curp; p_tx->cur_send_frag_num = 0; p_curp->bds_set[p_tx->cur_send_frag_num].tx_frag = pkt->first_frag; p_curp->bds_set[p_tx->cur_send_frag_num].frag_len = pkt->first_frag_len; p_tx->cur_send_frag_num++; } static void qed_ll2_prepare_tx_packet_set_bd(struct qed_hwfn *p_hwfn, struct qed_ll2_info *p_ll2, struct qed_ll2_tx_packet *p_curp, struct qed_ll2_tx_pkt_info *pkt) { struct qed_chain *p_tx_chain = &p_ll2->tx_queue.txq_chain; u16 prod_idx = qed_chain_get_prod_idx(p_tx_chain); struct core_tx_bd *start_bd = NULL; enum core_roce_flavor_type roce_flavor; enum core_tx_dest tx_dest; u16 bd_data = 0, frag_idx; u16 bitfield1; roce_flavor = (pkt->qed_roce_flavor == QED_LL2_ROCE) ? CORE_ROCE : CORE_RROCE; switch (pkt->tx_dest) { case QED_LL2_TX_DEST_NW: tx_dest = CORE_TX_DEST_NW; break; case QED_LL2_TX_DEST_LB: tx_dest = CORE_TX_DEST_LB; break; case QED_LL2_TX_DEST_DROP: tx_dest = CORE_TX_DEST_DROP; break; default: tx_dest = CORE_TX_DEST_LB; break; } start_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain); if (likely(QED_IS_IWARP_PERSONALITY(p_hwfn) && p_ll2->input.conn_type == QED_LL2_TYPE_OOO)) { start_bd->nw_vlan_or_lb_echo = cpu_to_le16(IWARP_LL2_IN_ORDER_TX_QUEUE); } else { start_bd->nw_vlan_or_lb_echo = cpu_to_le16(pkt->vlan); if (test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits) && p_ll2->input.conn_type == QED_LL2_TYPE_FCOE) pkt->remove_stag = true; } bitfield1 = le16_to_cpu(start_bd->bitfield1); SET_FIELD(bitfield1, CORE_TX_BD_L4_HDR_OFFSET_W, pkt->l4_hdr_offset_w); SET_FIELD(bitfield1, CORE_TX_BD_TX_DST, tx_dest); start_bd->bitfield1 = cpu_to_le16(bitfield1); bd_data |= pkt->bd_flags; SET_FIELD(bd_data, CORE_TX_BD_DATA_START_BD, 0x1); SET_FIELD(bd_data, CORE_TX_BD_DATA_NBDS, pkt->num_of_bds); SET_FIELD(bd_data, CORE_TX_BD_DATA_ROCE_FLAV, roce_flavor); SET_FIELD(bd_data, CORE_TX_BD_DATA_IP_CSUM, !!(pkt->enable_ip_cksum)); SET_FIELD(bd_data, CORE_TX_BD_DATA_L4_CSUM, !!(pkt->enable_l4_cksum)); SET_FIELD(bd_data, CORE_TX_BD_DATA_IP_LEN, !!(pkt->calc_ip_len)); SET_FIELD(bd_data, CORE_TX_BD_DATA_DISABLE_STAG_INSERTION, !!(pkt->remove_stag)); start_bd->bd_data.as_bitfield = cpu_to_le16(bd_data); DMA_REGPAIR_LE(start_bd->addr, pkt->first_frag); start_bd->nbytes = cpu_to_le16(pkt->first_frag_len); DP_VERBOSE(p_hwfn, (NETIF_MSG_TX_QUEUED | QED_MSG_LL2), "LL2 [q 0x%02x cid 0x%08x type 0x%08x] Tx Producer at [0x%04x] - set with a %04x bytes %02x BDs buffer at %08x:%08x\n", p_ll2->queue_id, p_ll2->cid, p_ll2->input.conn_type, prod_idx, pkt->first_frag_len, pkt->num_of_bds, le32_to_cpu(start_bd->addr.hi), le32_to_cpu(start_bd->addr.lo)); if (p_ll2->tx_queue.cur_send_frag_num == pkt->num_of_bds) return; /* Need to provide the packet with additional BDs for frags */ for (frag_idx = p_ll2->tx_queue.cur_send_frag_num; frag_idx < pkt->num_of_bds; frag_idx++) { struct core_tx_bd **p_bd = &p_curp->bds_set[frag_idx].txq_bd; *p_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain); (*p_bd)->bd_data.as_bitfield = 0; (*p_bd)->bitfield1 = 0; p_curp->bds_set[frag_idx].tx_frag = 0; p_curp->bds_set[frag_idx].frag_len = 0; } } /* This should be called while the Txq spinlock is being held */ static void qed_ll2_tx_packet_notify(struct qed_hwfn *p_hwfn, struct qed_ll2_info *p_ll2_conn) { bool b_notify = p_ll2_conn->tx_queue.cur_send_packet->notify_fw; struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue; struct qed_ll2_tx_packet *p_pkt = NULL; u16 bd_prod; /* If there are missing BDs, don't do anything now */ if (p_ll2_conn->tx_queue.cur_send_frag_num != p_ll2_conn->tx_queue.cur_send_packet->bd_used) return; /* Push the current packet to the list and clean after it */ list_add_tail(&p_ll2_conn->tx_queue.cur_send_packet->list_entry, &p_ll2_conn->tx_queue.sending_descq); p_ll2_conn->tx_queue.cur_send_packet = NULL; p_ll2_conn->tx_queue.cur_send_frag_num = 0; /* Notify FW of packet only if requested to */ if (!b_notify) return; bd_prod = qed_chain_get_prod_idx(&p_ll2_conn->tx_queue.txq_chain); while (!list_empty(&p_tx->sending_descq)) { p_pkt = list_first_entry(&p_tx->sending_descq, struct qed_ll2_tx_packet, list_entry); if (!p_pkt) break; list_move_tail(&p_pkt->list_entry, &p_tx->active_descq); } p_tx->db_msg.spq_prod = cpu_to_le16(bd_prod); /* Make sure the BDs data is updated before ringing the doorbell */ wmb(); DIRECT_REG_WR(p_tx->doorbell_addr, *((u32 *)&p_tx->db_msg)); DP_VERBOSE(p_hwfn, (NETIF_MSG_TX_QUEUED | QED_MSG_LL2), "LL2 [q 0x%02x cid 0x%08x type 0x%08x] Doorbelled [producer 0x%04x]\n", p_ll2_conn->queue_id, p_ll2_conn->cid, p_ll2_conn->input.conn_type, p_tx->db_msg.spq_prod); } int qed_ll2_prepare_tx_packet(void *cxt, u8 connection_handle, struct qed_ll2_tx_pkt_info *pkt, bool notify_fw) { struct qed_hwfn *p_hwfn = cxt; struct qed_ll2_tx_packet *p_curp = NULL; struct qed_ll2_info *p_ll2_conn = NULL; struct qed_ll2_tx_queue *p_tx; struct qed_chain *p_tx_chain; unsigned long flags; int rc = 0; p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle); if (unlikely(!p_ll2_conn)) return -EINVAL; p_tx = &p_ll2_conn->tx_queue; p_tx_chain = &p_tx->txq_chain; if (unlikely(pkt->num_of_bds > p_ll2_conn->input.tx_max_bds_per_packet)) return -EIO; spin_lock_irqsave(&p_tx->lock, flags); if (unlikely(p_tx->cur_send_packet)) { rc = -EEXIST; goto out; } /* Get entry, but only if we have tx elements for it */ if (unlikely(!list_empty(&p_tx->free_descq))) p_curp = list_first_entry(&p_tx->free_descq, struct qed_ll2_tx_packet, list_entry); if (unlikely(p_curp && qed_chain_get_elem_left(p_tx_chain) < pkt->num_of_bds)) p_curp = NULL; if (unlikely(!p_curp)) { rc = -EBUSY; goto out; } /* Prepare packet and BD, and perhaps send a doorbell to FW */ qed_ll2_prepare_tx_packet_set(p_hwfn, p_tx, p_curp, pkt, notify_fw); qed_ll2_prepare_tx_packet_set_bd(p_hwfn, p_ll2_conn, p_curp, pkt); qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn); out: spin_unlock_irqrestore(&p_tx->lock, flags); return rc; } int qed_ll2_set_fragment_of_tx_packet(void *cxt, u8 connection_handle, dma_addr_t addr, u16 nbytes) { struct qed_ll2_tx_packet *p_cur_send_packet = NULL; struct qed_hwfn *p_hwfn = cxt; struct qed_ll2_info *p_ll2_conn = NULL; u16 cur_send_frag_num = 0; struct core_tx_bd *p_bd; unsigned long flags; p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle); if (unlikely(!p_ll2_conn)) return -EINVAL; if (unlikely(!p_ll2_conn->tx_queue.cur_send_packet)) return -EINVAL; p_cur_send_packet = p_ll2_conn->tx_queue.cur_send_packet; cur_send_frag_num = p_ll2_conn->tx_queue.cur_send_frag_num; if (unlikely(cur_send_frag_num >= p_cur_send_packet->bd_used)) return -EINVAL; /* Fill the BD information, and possibly notify FW */ p_bd = p_cur_send_packet->bds_set[cur_send_frag_num].txq_bd; DMA_REGPAIR_LE(p_bd->addr, addr); p_bd->nbytes = cpu_to_le16(nbytes); p_cur_send_packet->bds_set[cur_send_frag_num].tx_frag = addr; p_cur_send_packet->bds_set[cur_send_frag_num].frag_len = nbytes; p_ll2_conn->tx_queue.cur_send_frag_num++; spin_lock_irqsave(&p_ll2_conn->tx_queue.lock, flags); qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn); spin_unlock_irqrestore(&p_ll2_conn->tx_queue.lock, flags); return 0; } int qed_ll2_terminate_connection(void *cxt, u8 connection_handle) { struct qed_hwfn *p_hwfn = cxt; struct qed_ll2_info *p_ll2_conn = NULL; int rc = -EINVAL; struct qed_ptt *p_ptt; p_ptt = qed_ptt_acquire(p_hwfn); if (!p_ptt) return -EAGAIN; p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle); if (!p_ll2_conn) { rc = -EINVAL; goto out; } /* Stop Tx & Rx of connection, if needed */ if (QED_LL2_TX_REGISTERED(p_ll2_conn)) { p_ll2_conn->tx_queue.b_cb_registered = false; smp_wmb(); /* Make sure this is seen by ll2_lb_rxq_completion */ rc = qed_sp_ll2_tx_queue_stop(p_hwfn, p_ll2_conn); if (rc) goto out; qed_ll2_txq_flush(p_hwfn, connection_handle); qed_int_unregister_cb(p_hwfn, p_ll2_conn->tx_queue.tx_sb_index); } if (QED_LL2_RX_REGISTERED(p_ll2_conn)) { p_ll2_conn->rx_queue.b_cb_registered = false; smp_wmb(); /* Make sure this is seen by ll2_lb_rxq_completion */ if (p_ll2_conn->rx_queue.ctx_based) qed_db_recovery_del(p_hwfn->cdev, p_ll2_conn->rx_queue.set_prod_addr, &p_ll2_conn->rx_queue.db_data); rc = qed_sp_ll2_rx_queue_stop(p_hwfn, p_ll2_conn); if (rc) goto out; qed_ll2_rxq_flush(p_hwfn, connection_handle); qed_int_unregister_cb(p_hwfn, p_ll2_conn->rx_queue.rx_sb_index); } if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO) qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info); if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE) { if (!test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits)) qed_llh_remove_protocol_filter(p_hwfn->cdev, 0, QED_LLH_FILTER_ETHERTYPE, ETH_P_FCOE, 0); qed_llh_remove_protocol_filter(p_hwfn->cdev, 0, QED_LLH_FILTER_ETHERTYPE, ETH_P_FIP, 0); } out: qed_ptt_release(p_hwfn, p_ptt); return rc; } static void qed_ll2_release_connection_ooo(struct qed_hwfn *p_hwfn, struct qed_ll2_info *p_ll2_conn) { struct qed_ooo_buffer *p_buffer; if (p_ll2_conn->input.conn_type != QED_LL2_TYPE_OOO) return; qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info); while ((p_buffer = qed_ooo_get_free_buffer(p_hwfn, p_hwfn->p_ooo_info))) { dma_free_coherent(&p_hwfn->cdev->pdev->dev, p_buffer->rx_buffer_size, p_buffer->rx_buffer_virt_addr, p_buffer->rx_buffer_phys_addr); kfree(p_buffer); } } void qed_ll2_release_connection(void *cxt, u8 connection_handle) { struct qed_hwfn *p_hwfn = cxt; struct qed_ll2_info *p_ll2_conn = NULL; p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle); if (!p_ll2_conn) return; kfree(p_ll2_conn->tx_queue.descq_mem); qed_chain_free(p_hwfn->cdev, &p_ll2_conn->tx_queue.txq_chain); kfree(p_ll2_conn->rx_queue.descq_array); qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rxq_chain); qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rcq_chain); qed_cxt_release_cid(p_hwfn, p_ll2_conn->cid); qed_ll2_release_connection_ooo(p_hwfn, p_ll2_conn); mutex_lock(&p_ll2_conn->mutex); p_ll2_conn->b_active = false; mutex_unlock(&p_ll2_conn->mutex); } int qed_ll2_alloc(struct qed_hwfn *p_hwfn) { struct qed_ll2_info *p_ll2_connections; u8 i; /* Allocate LL2's set struct */ p_ll2_connections = kcalloc(QED_MAX_NUM_OF_LL2_CONNECTIONS, sizeof(struct qed_ll2_info), GFP_KERNEL); if (!p_ll2_connections) { DP_NOTICE(p_hwfn, "Failed to allocate `struct qed_ll2'\n"); return -ENOMEM; } for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++) p_ll2_connections[i].my_id = i; p_hwfn->p_ll2_info = p_ll2_connections; return 0; } void qed_ll2_setup(struct qed_hwfn *p_hwfn) { int i; for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++) mutex_init(&p_hwfn->p_ll2_info[i].mutex); } void qed_ll2_free(struct qed_hwfn *p_hwfn) { if (!p_hwfn->p_ll2_info) return; kfree(p_hwfn->p_ll2_info); p_hwfn->p_ll2_info = NULL; } static void _qed_ll2_get_port_stats(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt, struct qed_ll2_stats *p_stats) { struct core_ll2_port_stats port_stats; memset(&port_stats, 0, sizeof(port_stats)); qed_memcpy_from(p_hwfn, p_ptt, &port_stats, BAR0_MAP_REG_TSDM_RAM + TSTORM_LL2_PORT_STAT_OFFSET(MFW_PORT(p_hwfn)), sizeof(port_stats)); p_stats->gsi_invalid_hdr += HILO_64_REGPAIR(port_stats.gsi_invalid_hdr); p_stats->gsi_invalid_pkt_length += HILO_64_REGPAIR(port_stats.gsi_invalid_pkt_length); p_stats->gsi_unsupported_pkt_typ += HILO_64_REGPAIR(port_stats.gsi_unsupported_pkt_typ); p_stats->gsi_crcchksm_error += HILO_64_REGPAIR(port_stats.gsi_crcchksm_error); } static void _qed_ll2_get_tstats(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt, struct qed_ll2_info *p_ll2_conn, struct qed_ll2_stats *p_stats) { struct core_ll2_tstorm_per_queue_stat tstats; u8 qid = p_ll2_conn->queue_id; u32 tstats_addr; memset(&tstats, 0, sizeof(tstats)); tstats_addr = BAR0_MAP_REG_TSDM_RAM + CORE_LL2_TSTORM_PER_QUEUE_STAT_OFFSET(qid); qed_memcpy_from(p_hwfn, p_ptt, &tstats, tstats_addr, sizeof(tstats)); p_stats->packet_too_big_discard += HILO_64_REGPAIR(tstats.packet_too_big_discard); p_stats->no_buff_discard += HILO_64_REGPAIR(tstats.no_buff_discard); } static void _qed_ll2_get_ustats(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt, struct qed_ll2_info *p_ll2_conn, struct qed_ll2_stats *p_stats) { struct core_ll2_ustorm_per_queue_stat ustats; u8 qid = p_ll2_conn->queue_id; u32 ustats_addr; memset(&ustats, 0, sizeof(ustats)); ustats_addr = BAR0_MAP_REG_USDM_RAM + CORE_LL2_USTORM_PER_QUEUE_STAT_OFFSET(qid); qed_memcpy_from(p_hwfn, p_ptt, &ustats, ustats_addr, sizeof(ustats)); p_stats->rcv_ucast_bytes += HILO_64_REGPAIR(ustats.rcv_ucast_bytes); p_stats->rcv_mcast_bytes += HILO_64_REGPAIR(ustats.rcv_mcast_bytes); p_stats->rcv_bcast_bytes += HILO_64_REGPAIR(ustats.rcv_bcast_bytes); p_stats->rcv_ucast_pkts += HILO_64_REGPAIR(ustats.rcv_ucast_pkts); p_stats->rcv_mcast_pkts += HILO_64_REGPAIR(ustats.rcv_mcast_pkts); p_stats->rcv_bcast_pkts += HILO_64_REGPAIR(ustats.rcv_bcast_pkts); } static void _qed_ll2_get_pstats(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt, struct qed_ll2_info *p_ll2_conn, struct qed_ll2_stats *p_stats) { struct core_ll2_pstorm_per_queue_stat pstats; u8 stats_id = p_ll2_conn->tx_stats_id; u32 pstats_addr; memset(&pstats, 0, sizeof(pstats)); pstats_addr = BAR0_MAP_REG_PSDM_RAM + CORE_LL2_PSTORM_PER_QUEUE_STAT_OFFSET(stats_id); qed_memcpy_from(p_hwfn, p_ptt, &pstats, pstats_addr, sizeof(pstats)); p_stats->sent_ucast_bytes += HILO_64_REGPAIR(pstats.sent_ucast_bytes); p_stats->sent_mcast_bytes += HILO_64_REGPAIR(pstats.sent_mcast_bytes); p_stats->sent_bcast_bytes += HILO_64_REGPAIR(pstats.sent_bcast_bytes); p_stats->sent_ucast_pkts += HILO_64_REGPAIR(pstats.sent_ucast_pkts); p_stats->sent_mcast_pkts += HILO_64_REGPAIR(pstats.sent_mcast_pkts); p_stats->sent_bcast_pkts += HILO_64_REGPAIR(pstats.sent_bcast_pkts); } static int __qed_ll2_get_stats(void *cxt, u8 connection_handle, struct qed_ll2_stats *p_stats) { struct qed_hwfn *p_hwfn = cxt; struct qed_ll2_info *p_ll2_conn = NULL; struct qed_ptt *p_ptt; if ((connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS) || !p_hwfn->p_ll2_info) return -EINVAL; p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle]; p_ptt = qed_ptt_acquire(p_hwfn); if (!p_ptt) { DP_ERR(p_hwfn, "Failed to acquire ptt\n"); return -EINVAL; } if (p_ll2_conn->input.gsi_enable) _qed_ll2_get_port_stats(p_hwfn, p_ptt, p_stats); _qed_ll2_get_tstats(p_hwfn, p_ptt, p_ll2_conn, p_stats); _qed_ll2_get_ustats(p_hwfn, p_ptt, p_ll2_conn, p_stats); if (p_ll2_conn->tx_stats_en) _qed_ll2_get_pstats(p_hwfn, p_ptt, p_ll2_conn, p_stats); qed_ptt_release(p_hwfn, p_ptt); return 0; } int qed_ll2_get_stats(void *cxt, u8 connection_handle, struct qed_ll2_stats *p_stats) { memset(p_stats, 0, sizeof(*p_stats)); return __qed_ll2_get_stats(cxt, connection_handle, p_stats); } static void qed_ll2b_release_rx_packet(void *cxt, u8 connection_handle, void *cookie, dma_addr_t rx_buf_addr, bool b_last_packet) { struct qed_hwfn *p_hwfn = cxt; qed_ll2_dealloc_buffer(p_hwfn->cdev, cookie); } static void qed_ll2_register_cb_ops(struct qed_dev *cdev, const struct qed_ll2_cb_ops *ops, void *cookie) { cdev->ll2->cbs = ops; cdev->ll2->cb_cookie = cookie; } static struct qed_ll2_cbs ll2_cbs = { .rx_comp_cb = &qed_ll2b_complete_rx_packet, .rx_release_cb = &qed_ll2b_release_rx_packet, .tx_comp_cb = &qed_ll2b_complete_tx_packet, .tx_release_cb = &qed_ll2b_complete_tx_packet, }; static void qed_ll2_set_conn_data(struct qed_hwfn *p_hwfn, struct qed_ll2_acquire_data *data, struct qed_ll2_params *params, enum qed_ll2_conn_type conn_type, u8 *handle, bool lb) { memset(data, 0, sizeof(*data)); data->input.conn_type = conn_type; data->input.mtu = params->mtu; data->input.rx_num_desc = QED_LL2_RX_SIZE; data->input.rx_drop_ttl0_flg = params->drop_ttl0_packets; data->input.rx_vlan_removal_en = params->rx_vlan_stripping; data->input.tx_num_desc = QED_LL2_TX_SIZE; data->p_connection_handle = handle; data->cbs = &ll2_cbs; ll2_cbs.cookie = p_hwfn; if (lb) { data->input.tx_tc = PKT_LB_TC; data->input.tx_dest = QED_LL2_TX_DEST_LB; } else { data->input.tx_tc = 0; data->input.tx_dest = QED_LL2_TX_DEST_NW; } } static int qed_ll2_start_ooo(struct qed_hwfn *p_hwfn, struct qed_ll2_params *params) { u8 *handle = &p_hwfn->pf_params.iscsi_pf_params.ll2_ooo_queue_id; struct qed_ll2_acquire_data data; int rc; qed_ll2_set_conn_data(p_hwfn, &data, params, QED_LL2_TYPE_OOO, handle, true); rc = qed_ll2_acquire_connection(p_hwfn, &data); if (rc) { DP_INFO(p_hwfn, "Failed to acquire LL2 OOO connection\n"); goto out; } rc = qed_ll2_establish_connection(p_hwfn, *handle); if (rc) { DP_INFO(p_hwfn, "Failed to establish LL2 OOO connection\n"); goto fail; } return 0; fail: qed_ll2_release_connection(p_hwfn, *handle); out: *handle = QED_LL2_UNUSED_HANDLE; return rc; } static bool qed_ll2_is_storage_eng1(struct qed_dev *cdev) { return (QED_IS_FCOE_PERSONALITY(QED_LEADING_HWFN(cdev)) || QED_IS_ISCSI_PERSONALITY(QED_LEADING_HWFN(cdev)) || QED_IS_NVMETCP_PERSONALITY(QED_LEADING_HWFN(cdev))) && (QED_AFFIN_HWFN(cdev) != QED_LEADING_HWFN(cdev)); } static int __qed_ll2_stop(struct qed_hwfn *p_hwfn) { struct qed_dev *cdev = p_hwfn->cdev; int rc; rc = qed_ll2_terminate_connection(p_hwfn, cdev->ll2->handle); if (rc) DP_INFO(cdev, "Failed to terminate LL2 connection\n"); qed_ll2_release_connection(p_hwfn, cdev->ll2->handle); return rc; } static int qed_ll2_stop(struct qed_dev *cdev) { bool b_is_storage_eng1 = qed_ll2_is_storage_eng1(cdev); struct qed_hwfn *p_hwfn = QED_AFFIN_HWFN(cdev); int rc = 0, rc2 = 0; if (cdev->ll2->handle == QED_LL2_UNUSED_HANDLE) return 0; if (!QED_IS_NVMETCP_PERSONALITY(p_hwfn)) qed_llh_remove_mac_filter(cdev, 0, cdev->ll2_mac_address); qed_llh_remove_mac_filter(cdev, 0, cdev->ll2_mac_address); eth_zero_addr(cdev->ll2_mac_address); if (QED_IS_ISCSI_PERSONALITY(p_hwfn) || QED_IS_NVMETCP_PERSONALITY(p_hwfn)) qed_ll2_stop_ooo(p_hwfn); /* In CMT mode, LL2 is always started on engine 0 for a storage PF */ if (b_is_storage_eng1) { rc2 = __qed_ll2_stop(QED_LEADING_HWFN(cdev)); if (rc2) DP_NOTICE(QED_LEADING_HWFN(cdev), "Failed to stop LL2 on engine 0\n"); } rc = __qed_ll2_stop(p_hwfn); if (rc) DP_NOTICE(p_hwfn, "Failed to stop LL2\n"); qed_ll2_kill_buffers(cdev); cdev->ll2->handle = QED_LL2_UNUSED_HANDLE; return rc | rc2; } static int __qed_ll2_start(struct qed_hwfn *p_hwfn, struct qed_ll2_params *params) { struct qed_ll2_buffer *buffer, *tmp_buffer; struct qed_dev *cdev = p_hwfn->cdev; enum qed_ll2_conn_type conn_type; struct qed_ll2_acquire_data data; int rc, rx_cnt; switch (p_hwfn->hw_info.personality) { case QED_PCI_FCOE: conn_type = QED_LL2_TYPE_FCOE; break; case QED_PCI_ISCSI: case QED_PCI_NVMETCP: conn_type = QED_LL2_TYPE_TCP_ULP; break; case QED_PCI_ETH_ROCE: conn_type = QED_LL2_TYPE_ROCE; break; default: conn_type = QED_LL2_TYPE_TEST; } qed_ll2_set_conn_data(p_hwfn, &data, params, conn_type, &cdev->ll2->handle, false); rc = qed_ll2_acquire_connection(p_hwfn, &data); if (rc) { DP_INFO(p_hwfn, "Failed to acquire LL2 connection\n"); return rc; } rc = qed_ll2_establish_connection(p_hwfn, cdev->ll2->handle); if (rc) { DP_INFO(p_hwfn, "Failed to establish LL2 connection\n"); goto release_conn; } /* Post all Rx buffers to FW */ spin_lock_bh(&cdev->ll2->lock); rx_cnt = cdev->ll2->rx_cnt; list_for_each_entry_safe(buffer, tmp_buffer, &cdev->ll2->list, list) { rc = qed_ll2_post_rx_buffer(p_hwfn, cdev->ll2->handle, buffer->phys_addr, 0, buffer, 1); if (rc) { DP_INFO(p_hwfn, "Failed to post an Rx buffer; Deleting it\n"); dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr, cdev->ll2->rx_size, DMA_FROM_DEVICE); kfree(buffer->data); list_del(&buffer->list); kfree(buffer); } else { rx_cnt++; } } spin_unlock_bh(&cdev->ll2->lock); if (rx_cnt == cdev->ll2->rx_cnt) { DP_NOTICE(p_hwfn, "Failed passing even a single Rx buffer\n"); goto terminate_conn; } cdev->ll2->rx_cnt = rx_cnt; return 0; terminate_conn: qed_ll2_terminate_connection(p_hwfn, cdev->ll2->handle); release_conn: qed_ll2_release_connection(p_hwfn, cdev->ll2->handle); return rc; } static int qed_ll2_start(struct qed_dev *cdev, struct qed_ll2_params *params) { bool b_is_storage_eng1 = qed_ll2_is_storage_eng1(cdev); struct qed_hwfn *p_hwfn = QED_AFFIN_HWFN(cdev); struct qed_ll2_buffer *buffer; int rx_num_desc, i, rc; if (!is_valid_ether_addr(params->ll2_mac_address)) { DP_NOTICE(cdev, "Invalid Ethernet address\n"); return -EINVAL; } WARN_ON(!cdev->ll2->cbs); /* Initialize LL2 locks & lists */ INIT_LIST_HEAD(&cdev->ll2->list); spin_lock_init(&cdev->ll2->lock); cdev->ll2->rx_size = NET_SKB_PAD + ETH_HLEN + L1_CACHE_BYTES + params->mtu; /* Allocate memory for LL2. * In CMT mode, in case of a storage PF which is affintized to engine 1, * LL2 is started also on engine 0 and thus we need twofold buffers. */ rx_num_desc = QED_LL2_RX_SIZE * (b_is_storage_eng1 ? 2 : 1); DP_INFO(cdev, "Allocating %d LL2 buffers of size %08x bytes\n", rx_num_desc, cdev->ll2->rx_size); for (i = 0; i < rx_num_desc; i++) { buffer = kzalloc(sizeof(*buffer), GFP_KERNEL); if (!buffer) { DP_INFO(cdev, "Failed to allocate LL2 buffers\n"); rc = -ENOMEM; goto err0; } rc = qed_ll2_alloc_buffer(cdev, (u8 **)&buffer->data, &buffer->phys_addr); if (rc) { kfree(buffer); goto err0; } list_add_tail(&buffer->list, &cdev->ll2->list); } rc = __qed_ll2_start(p_hwfn, params); if (rc) { DP_NOTICE(cdev, "Failed to start LL2\n"); goto err0; } /* In CMT mode, always need to start LL2 on engine 0 for a storage PF, * since broadcast/mutlicast packets are routed to engine 0. */ if (b_is_storage_eng1) { rc = __qed_ll2_start(QED_LEADING_HWFN(cdev), params); if (rc) { DP_NOTICE(QED_LEADING_HWFN(cdev), "Failed to start LL2 on engine 0\n"); goto err1; } } if (QED_IS_ISCSI_PERSONALITY(p_hwfn) || QED_IS_NVMETCP_PERSONALITY(p_hwfn)) { DP_VERBOSE(cdev, QED_MSG_STORAGE, "Starting OOO LL2 queue\n"); rc = qed_ll2_start_ooo(p_hwfn, params); if (rc) { DP_NOTICE(cdev, "Failed to start OOO LL2\n"); goto err2; } } if (!QED_IS_NVMETCP_PERSONALITY(p_hwfn)) { rc = qed_llh_add_mac_filter(cdev, 0, params->ll2_mac_address); if (rc) { DP_NOTICE(cdev, "Failed to add an LLH filter\n"); goto err3; } } ether_addr_copy(cdev->ll2_mac_address, params->ll2_mac_address); return 0; err3: if (QED_IS_ISCSI_PERSONALITY(p_hwfn) || QED_IS_NVMETCP_PERSONALITY(p_hwfn)) qed_ll2_stop_ooo(p_hwfn); err2: if (b_is_storage_eng1) __qed_ll2_stop(QED_LEADING_HWFN(cdev)); err1: __qed_ll2_stop(p_hwfn); err0: qed_ll2_kill_buffers(cdev); cdev->ll2->handle = QED_LL2_UNUSED_HANDLE; return rc; } static int qed_ll2_start_xmit(struct qed_dev *cdev, struct sk_buff *skb, unsigned long xmit_flags) { struct qed_hwfn *p_hwfn = QED_AFFIN_HWFN(cdev); struct qed_ll2_tx_pkt_info pkt; const skb_frag_t *frag; u8 flags = 0, nr_frags; int rc = -EINVAL, i; dma_addr_t mapping; u16 vlan = 0; if (unlikely(skb->ip_summed != CHECKSUM_NONE)) { DP_INFO(cdev, "Cannot transmit a checksummed packet\n"); return -EINVAL; } /* Cache number of fragments from SKB since SKB may be freed by * the completion routine after calling qed_ll2_prepare_tx_packet() */ nr_frags = skb_shinfo(skb)->nr_frags; if (unlikely(1 + nr_frags > CORE_LL2_TX_MAX_BDS_PER_PACKET)) { DP_ERR(cdev, "Cannot transmit a packet with %d fragments\n", 1 + nr_frags); return -EINVAL; } mapping = dma_map_single(&cdev->pdev->dev, skb->data, skb->len, DMA_TO_DEVICE); if (unlikely(dma_mapping_error(&cdev->pdev->dev, mapping))) { DP_NOTICE(cdev, "SKB mapping failed\n"); return -EINVAL; } /* Request HW to calculate IP csum */ if (!((vlan_get_protocol(skb) == htons(ETH_P_IPV6)) && ipv6_hdr(skb)->nexthdr == NEXTHDR_IPV6)) flags |= BIT(CORE_TX_BD_DATA_IP_CSUM_SHIFT); if (skb_vlan_tag_present(skb)) { vlan = skb_vlan_tag_get(skb); flags |= BIT(CORE_TX_BD_DATA_VLAN_INSERTION_SHIFT); } memset(&pkt, 0, sizeof(pkt)); pkt.num_of_bds = 1 + nr_frags; pkt.vlan = vlan; pkt.bd_flags = flags; pkt.tx_dest = QED_LL2_TX_DEST_NW; pkt.first_frag = mapping; pkt.first_frag_len = skb->len; pkt.cookie = skb; if (test_bit(QED_MF_UFP_SPECIFIC, &cdev->mf_bits) && test_bit(QED_LL2_XMIT_FLAGS_FIP_DISCOVERY, &xmit_flags)) pkt.remove_stag = true; /* qed_ll2_prepare_tx_packet() may actually send the packet if * there are no fragments in the skb and subsequently the completion * routine may run and free the SKB, so no dereferencing the SKB * beyond this point unless skb has any fragments. */ rc = qed_ll2_prepare_tx_packet(p_hwfn, cdev->ll2->handle, &pkt, 1); if (unlikely(rc)) goto err; for (i = 0; i < nr_frags; i++) { frag = &skb_shinfo(skb)->frags[i]; mapping = skb_frag_dma_map(&cdev->pdev->dev, frag, 0, skb_frag_size(frag), DMA_TO_DEVICE); if (unlikely(dma_mapping_error(&cdev->pdev->dev, mapping))) { DP_NOTICE(cdev, "Unable to map frag - dropping packet\n"); rc = -ENOMEM; goto err; } rc = qed_ll2_set_fragment_of_tx_packet(p_hwfn, cdev->ll2->handle, mapping, skb_frag_size(frag)); /* if failed not much to do here, partial packet has been posted * we can't free memory, will need to wait for completion */ if (unlikely(rc)) goto err2; } return 0; err: dma_unmap_single(&cdev->pdev->dev, mapping, skb->len, DMA_TO_DEVICE); err2: return rc; } static int qed_ll2_stats(struct qed_dev *cdev, struct qed_ll2_stats *stats) { bool b_is_storage_eng1 = qed_ll2_is_storage_eng1(cdev); struct qed_hwfn *p_hwfn = QED_AFFIN_HWFN(cdev); int rc; if (!cdev->ll2) return -EINVAL; rc = qed_ll2_get_stats(p_hwfn, cdev->ll2->handle, stats); if (rc) { DP_NOTICE(p_hwfn, "Failed to get LL2 stats\n"); return rc; } /* In CMT mode, LL2 is always started on engine 0 for a storage PF */ if (b_is_storage_eng1) { rc = __qed_ll2_get_stats(QED_LEADING_HWFN(cdev), cdev->ll2->handle, stats); if (rc) { DP_NOTICE(QED_LEADING_HWFN(cdev), "Failed to get LL2 stats on engine 0\n"); return rc; } } return 0; } const struct qed_ll2_ops qed_ll2_ops_pass = { .start = &qed_ll2_start, .stop = &qed_ll2_stop, .start_xmit = &qed_ll2_start_xmit, .register_cb_ops = &qed_ll2_register_cb_ops, .get_stats = &qed_ll2_stats, }; int qed_ll2_alloc_if(struct qed_dev *cdev) { cdev->ll2 = kzalloc(sizeof(*cdev->ll2), GFP_KERNEL); return cdev->ll2 ? 0 : -ENOMEM; } void qed_ll2_dealloc_if(struct qed_dev *cdev) { kfree(cdev->ll2); cdev->ll2 = NULL; }
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