diff options
Diffstat (limited to 'drivers/net/ethernet/qlogic/qed/qed_ll2.c')
| -rw-r--r-- | drivers/net/ethernet/qlogic/qed/qed_ll2.c | 2823 |
1 files changed, 2823 insertions, 0 deletions
diff --git a/drivers/net/ethernet/qlogic/qed/qed_ll2.c b/drivers/net/ethernet/qlogic/qed/qed_ll2.c new file mode 100644 index 000000000..810df65cd --- /dev/null +++ b/drivers/net/ethernet/qlogic/qed/qed_ll2.c @@ -0,0 +1,2823 @@ +// 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) +{ + size_t size = cdev->ll2->rx_size + NET_SKB_PAD + + SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); + + *data = kmalloc(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 = build_skb(buffer->data, 0); + 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 = PRM_DMA_PAD_BYTES_NUM + 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; +} |