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1/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */2/* QLogic qed NIC Driver3 * Copyright (c) 2015-2017 QLogic Corporation4 * Copyright (c) 2019-2020 Marvell International Ltd.5 */6 7#ifndef _QED_LL2_H8#define _QED_LL2_H9 10#include <linux/types.h>11#include <linux/kernel.h>12#include <linux/list.h>13#include <linux/mutex.h>14#include <linux/slab.h>15#include <linux/spinlock.h>16#include <linux/qed/qed_chain.h>17#include <linux/qed/qed_ll2_if.h>18#include "qed.h"19#include "qed_hsi.h"20#include "qed_sp.h"21 22#define QED_MAX_NUM_OF_LL2_CONNECTIONS (4)23/* LL2 queues handles will be split as follows:24 * first will be legacy queues, and then the ctx based queues.25 */26#define QED_MAX_NUM_OF_LL2_CONNS_PF (4)27#define QED_MAX_NUM_OF_LEGACY_LL2_CONNS_PF (3)28 29#define QED_MAX_NUM_OF_CTX_LL2_CONNS_PF \30 (QED_MAX_NUM_OF_LL2_CONNS_PF - QED_MAX_NUM_OF_LEGACY_LL2_CONNS_PF)31 32#define QED_LL2_LEGACY_CONN_BASE_PF 033#define QED_LL2_CTX_CONN_BASE_PF QED_MAX_NUM_OF_LEGACY_LL2_CONNS_PF34 35struct qed_ll2_rx_packet {36 struct list_head list_entry;37 struct core_rx_bd_with_buff_len *rxq_bd;38 dma_addr_t rx_buf_addr;39 u16 buf_length;40 void *cookie;41 u8 placement_offset;42 u16 parse_flags;43 u16 packet_length;44 u16 vlan;45 u32 opaque_data[2];46};47 48struct qed_ll2_tx_packet {49 struct list_head list_entry;50 u16 bd_used;51 bool notify_fw;52 void *cookie;53 /* Flexible Array of bds_set determined by max_bds_per_packet */54 struct {55 struct core_tx_bd *txq_bd;56 dma_addr_t tx_frag;57 u16 frag_len;58 } bds_set[];59};60 61struct qed_ll2_rx_queue {62 /* Lock protecting the Rx queue manipulation */63 spinlock_t lock;64 struct qed_chain rxq_chain;65 struct qed_chain rcq_chain;66 u8 rx_sb_index;67 u8 ctx_based;68 bool b_cb_registered;69 __le16 *p_fw_cons;70 struct list_head active_descq;71 struct list_head free_descq;72 struct list_head posting_descq;73 struct qed_ll2_rx_packet *descq_array;74 void __iomem *set_prod_addr;75 struct core_pwm_prod_update_data db_data;76};77 78struct qed_ll2_tx_queue {79 /* Lock protecting the Tx queue manipulation */80 spinlock_t lock;81 struct qed_chain txq_chain;82 u8 tx_sb_index;83 bool b_cb_registered;84 __le16 *p_fw_cons;85 struct list_head active_descq;86 struct list_head free_descq;87 struct list_head sending_descq;88 u16 cur_completing_bd_idx;89 void __iomem *doorbell_addr;90 struct core_db_data db_msg;91 u16 bds_idx;92 u16 cur_send_frag_num;93 u16 cur_completing_frag_num;94 bool b_completing_packet;95 void *descq_mem; /* memory for variable sized qed_ll2_tx_packet*/96 struct qed_ll2_tx_packet *cur_send_packet;97 struct qed_ll2_tx_packet cur_completing_packet;98};99 100struct qed_ll2_info {101 /* Lock protecting the state of LL2 */102 struct mutex mutex;103 104 struct qed_ll2_acquire_data_inputs input;105 u32 cid;106 u8 my_id;107 u8 queue_id;108 u8 tx_stats_id;109 bool b_active;110 enum core_tx_dest tx_dest;111 u8 tx_stats_en;112 bool main_func_queue;113 struct qed_ll2_cbs cbs;114 struct qed_ll2_rx_queue rx_queue;115 struct qed_ll2_tx_queue tx_queue;116};117 118extern const struct qed_ll2_ops qed_ll2_ops_pass;119 120/**121 * qed_ll2_acquire_connection(): Allocate resources,122 * starts rx & tx (if relevant) queues pair.123 * Provides connecion handler as output124 * parameter.125 *126 * @cxt: Pointer to the hw-function [opaque to some].127 * @data: Describes connection parameters.128 *129 * Return: Int.130 */131int qed_ll2_acquire_connection(void *cxt, struct qed_ll2_acquire_data *data);132 133/**134 * qed_ll2_establish_connection(): start previously allocated LL2 queues pair135 *136 * @cxt: Pointer to the hw-function [opaque to some].137 * @connection_handle: LL2 connection's handle obtained from138 * qed_ll2_require_connection.139 *140 * Return: 0 on success, failure otherwise.141 */142int qed_ll2_establish_connection(void *cxt, u8 connection_handle);143 144/**145 * qed_ll2_post_rx_buffer(): Submit buffers to LL2 Rx queue.146 *147 * @cxt: Pointer to the hw-function [opaque to some].148 * @connection_handle: LL2 connection's handle obtained from149 * qed_ll2_require_connection.150 * @addr: RX (physical address) buffers to submit.151 * @buf_len: Buffer Len.152 * @cookie: Cookie.153 * @notify_fw: Produce corresponding Rx BD immediately.154 *155 * Return: 0 on success, failure otherwise.156 */157int qed_ll2_post_rx_buffer(void *cxt,158 u8 connection_handle,159 dma_addr_t addr,160 u16 buf_len, void *cookie, u8 notify_fw);161 162/**163 * qed_ll2_prepare_tx_packet(): Request for start Tx BD164 * to prepare Tx packet submission to FW.165 *166 * @cxt: Pointer to the hw-function [opaque to some].167 * @connection_handle: Connection handle.168 * @pkt: Info regarding the tx packet.169 * @notify_fw: Issue doorbell to fw for this packet.170 *171 * Return: 0 on success, failure otherwise.172 */173int qed_ll2_prepare_tx_packet(void *cxt,174 u8 connection_handle,175 struct qed_ll2_tx_pkt_info *pkt,176 bool notify_fw);177 178/**179 * qed_ll2_release_connection(): Releases resources allocated for LL2180 * connection.181 *182 * @cxt: Pointer to the hw-function [opaque to some].183 * @connection_handle: LL2 connection's handle obtained from184 * qed_ll2_require_connection.185 *186 * Return: Void.187 */188void qed_ll2_release_connection(void *cxt, u8 connection_handle);189 190/**191 * qed_ll2_set_fragment_of_tx_packet(): Provides fragments to fill192 * Tx BD of BDs requested by193 * qed_ll2_prepare_tx_packet194 *195 * @cxt: Pointer to the hw-function [opaque to some].196 * @connection_handle: LL2 connection's handle obtained from197 * qed_ll2_require_connection.198 * @addr: Address.199 * @nbytes: Number of bytes.200 *201 * Return: 0 on success, failure otherwise.202 */203int qed_ll2_set_fragment_of_tx_packet(void *cxt,204 u8 connection_handle,205 dma_addr_t addr, u16 nbytes);206 207/**208 * qed_ll2_terminate_connection(): Stops Tx/Rx queues209 *210 * @cxt: Pointer to the hw-function [opaque to some].211 * @connection_handle: LL2 connection's handle obtained from212 * qed_ll2_require_connection.213 *214 * Return: 0 on success, failure otherwise.215 */216int qed_ll2_terminate_connection(void *cxt, u8 connection_handle);217 218/**219 * qed_ll2_get_stats(): Get LL2 queue's statistics220 *221 * @cxt: Pointer to the hw-function [opaque to some].222 * @connection_handle: LL2 connection's handle obtained from223 * qed_ll2_require_connection.224 * @p_stats: Pointer Status.225 *226 * Return: 0 on success, failure otherwise.227 */228int qed_ll2_get_stats(void *cxt,229 u8 connection_handle, struct qed_ll2_stats *p_stats);230 231/**232 * qed_ll2_alloc(): Allocates LL2 connections set.233 *234 * @p_hwfn: HW device data.235 *236 * Return: Int.237 */238int qed_ll2_alloc(struct qed_hwfn *p_hwfn);239 240/**241 * qed_ll2_setup(): Inits LL2 connections set.242 *243 * @p_hwfn: HW device data.244 *245 * Return: Void.246 *247 */248void qed_ll2_setup(struct qed_hwfn *p_hwfn);249 250/**251 * qed_ll2_free(): Releases LL2 connections set252 *253 * @p_hwfn: HW device data.254 *255 * Return: Void.256 *257 */258void qed_ll2_free(struct qed_hwfn *p_hwfn);259 260#endif261