/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */
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/* QLogic qed NIC Driver
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* Copyright (c) 2015-2017 QLogic Corporation
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* Copyright (c) 2019-2020 Marvell International Ltd.
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*/
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#ifndef _QED_LL2_H
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#define _QED_LL2_H
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/mutex.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/qed/qed_chain.h>
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#include <linux/qed/qed_ll2_if.h>
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#include "qed.h"
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#include "qed_hsi.h"
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#include "qed_sp.h"
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#define QED_MAX_NUM_OF_LL2_CONNECTIONS (4)
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/* LL2 queues handles will be split as follows:
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* first will be legacy queues, and then the ctx based queues.
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*/
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#define QED_MAX_NUM_OF_LL2_CONNS_PF (4)
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#define QED_MAX_NUM_OF_LEGACY_LL2_CONNS_PF (3)
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#define QED_MAX_NUM_OF_CTX_LL2_CONNS_PF \
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(QED_MAX_NUM_OF_LL2_CONNS_PF - QED_MAX_NUM_OF_LEGACY_LL2_CONNS_PF)
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#define QED_LL2_LEGACY_CONN_BASE_PF 0
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#define QED_LL2_CTX_CONN_BASE_PF QED_MAX_NUM_OF_LEGACY_LL2_CONNS_PF
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struct qed_ll2_rx_packet {
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struct list_head list_entry;
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struct core_rx_bd_with_buff_len *rxq_bd;
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dma_addr_t rx_buf_addr;
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u16 buf_length;
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void *cookie;
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u8 placement_offset;
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u16 parse_flags;
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u16 packet_length;
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u16 vlan;
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u32 opaque_data[2];
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};
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struct qed_ll2_tx_packet {
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struct list_head list_entry;
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u16 bd_used;
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bool notify_fw;
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void *cookie;
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/* Flexible Array of bds_set determined by max_bds_per_packet */
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struct {
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struct core_tx_bd *txq_bd;
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dma_addr_t tx_frag;
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u16 frag_len;
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} bds_set[];
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};
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struct qed_ll2_rx_queue {
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/* Lock protecting the Rx queue manipulation */
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spinlock_t lock;
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struct qed_chain rxq_chain;
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struct qed_chain rcq_chain;
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u8 rx_sb_index;
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u8 ctx_based;
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bool b_cb_registered;
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__le16 *p_fw_cons;
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struct list_head active_descq;
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struct list_head free_descq;
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struct list_head posting_descq;
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struct qed_ll2_rx_packet *descq_array;
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void __iomem *set_prod_addr;
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struct core_pwm_prod_update_data db_data;
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};
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struct qed_ll2_tx_queue {
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/* Lock protecting the Tx queue manipulation */
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spinlock_t lock;
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struct qed_chain txq_chain;
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u8 tx_sb_index;
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bool b_cb_registered;
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__le16 *p_fw_cons;
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struct list_head active_descq;
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struct list_head free_descq;
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struct list_head sending_descq;
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u16 cur_completing_bd_idx;
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void __iomem *doorbell_addr;
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struct core_db_data db_msg;
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u16 bds_idx;
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u16 cur_send_frag_num;
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u16 cur_completing_frag_num;
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bool b_completing_packet;
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void *descq_mem; /* memory for variable sized qed_ll2_tx_packet*/
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struct qed_ll2_tx_packet *cur_send_packet;
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struct qed_ll2_tx_packet cur_completing_packet;
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};
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struct qed_ll2_info {
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/* Lock protecting the state of LL2 */
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struct mutex mutex;
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struct qed_ll2_acquire_data_inputs input;
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u32 cid;
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u8 my_id;
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u8 queue_id;
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u8 tx_stats_id;
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bool b_active;
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enum core_tx_dest tx_dest;
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u8 tx_stats_en;
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bool main_func_queue;
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struct qed_ll2_cbs cbs;
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struct qed_ll2_rx_queue rx_queue;
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struct qed_ll2_tx_queue tx_queue;
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};
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extern const struct qed_ll2_ops qed_ll2_ops_pass;
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/**
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* @brief qed_ll2_acquire_connection - allocate resources,
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* starts rx & tx (if relevant) queues pair. Provides
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* connecion handler as output parameter.
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*
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*
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* @param cxt - pointer to the hw-function [opaque to some]
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* @param data - describes connection parameters
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* @return int
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*/
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int qed_ll2_acquire_connection(void *cxt, struct qed_ll2_acquire_data *data);
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/**
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* @brief qed_ll2_establish_connection - start previously
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* allocated LL2 queues pair
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*
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* @param cxt - pointer to the hw-function [opaque to some]
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* @param p_ptt
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* @param connection_handle LL2 connection's handle obtained from
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* qed_ll2_require_connection
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*
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* @return 0 on success, failure otherwise
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*/
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int qed_ll2_establish_connection(void *cxt, u8 connection_handle);
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/**
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* @brief qed_ll2_post_rx_buffers - submit buffers to LL2 Rx queue.
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*
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* @param cxt - pointer to the hw-function [opaque to some]
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* @param connection_handle LL2 connection's handle obtained from
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* qed_ll2_require_connection
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* @param addr rx (physical address) buffers to submit
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* @param cookie
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* @param notify_fw produce corresponding Rx BD immediately
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*
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* @return 0 on success, failure otherwise
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*/
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int qed_ll2_post_rx_buffer(void *cxt,
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u8 connection_handle,
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dma_addr_t addr,
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u16 buf_len, void *cookie, u8 notify_fw);
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/**
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* @brief qed_ll2_prepare_tx_packet - request for start Tx BD
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* to prepare Tx packet submission to FW.
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*
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* @param cxt - pointer to the hw-function [opaque to some]
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* @param connection_handle
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* @param pkt - info regarding the tx packet
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* @param notify_fw - issue doorbell to fw for this packet
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*
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* @return 0 on success, failure otherwise
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*/
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int qed_ll2_prepare_tx_packet(void *cxt,
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u8 connection_handle,
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struct qed_ll2_tx_pkt_info *pkt,
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bool notify_fw);
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/**
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* @brief qed_ll2_release_connection - releases resources
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* allocated for LL2 connection
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*
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* @param cxt - pointer to the hw-function [opaque to some]
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* @param connection_handle LL2 connection's handle obtained from
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* qed_ll2_require_connection
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*/
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void qed_ll2_release_connection(void *cxt, u8 connection_handle);
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/**
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* @brief qed_ll2_set_fragment_of_tx_packet - provides fragments to fill
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* Tx BD of BDs requested by
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* qed_ll2_prepare_tx_packet
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*
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* @param cxt - pointer to the hw-function [opaque to some]
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* @param connection_handle LL2 connection's handle
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* obtained from
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* qed_ll2_require_connection
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* @param addr
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* @param nbytes
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*
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* @return 0 on success, failure otherwise
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*/
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int qed_ll2_set_fragment_of_tx_packet(void *cxt,
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u8 connection_handle,
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dma_addr_t addr, u16 nbytes);
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/**
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* @brief qed_ll2_terminate_connection - stops Tx/Rx queues
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*
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*
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* @param cxt - pointer to the hw-function [opaque to some]
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* @param connection_handle LL2 connection's handle
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* obtained from
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* qed_ll2_require_connection
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*
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* @return 0 on success, failure otherwise
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*/
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int qed_ll2_terminate_connection(void *cxt, u8 connection_handle);
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/**
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* @brief qed_ll2_get_stats - get LL2 queue's statistics
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*
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*
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* @param cxt - pointer to the hw-function [opaque to some]
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* @param connection_handle LL2 connection's handle obtained from
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* qed_ll2_require_connection
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* @param p_stats
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*
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* @return 0 on success, failure otherwise
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*/
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int qed_ll2_get_stats(void *cxt,
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u8 connection_handle, struct qed_ll2_stats *p_stats);
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/**
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* @brief qed_ll2_alloc - Allocates LL2 connections set
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*
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* @param p_hwfn
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*
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* @return int
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*/
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int qed_ll2_alloc(struct qed_hwfn *p_hwfn);
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/**
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* @brief qed_ll2_setup - Inits LL2 connections set
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*
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* @param p_hwfn
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*
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*/
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void qed_ll2_setup(struct qed_hwfn *p_hwfn);
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/**
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* @brief qed_ll2_free - Releases LL2 connections set
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*
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* @param p_hwfn
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*
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*/
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void qed_ll2_free(struct qed_hwfn *p_hwfn);
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#endif
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