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/* 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.
*/
#ifndef _QED_LL2_H
#define _QED_LL2_H
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/qed/qed_chain.h>
#include <linux/qed/qed_ll2_if.h>
#include "qed.h"
#include "qed_hsi.h"
#include "qed_sp.h"
#define QED_MAX_NUM_OF_LL2_CONNECTIONS (4)
/* LL2 queues handles will be split as follows:
* first will be legacy queues, and then the ctx based queues.
*/
#define QED_MAX_NUM_OF_LL2_CONNS_PF (4)
#define QED_MAX_NUM_OF_LEGACY_LL2_CONNS_PF (3)
#define QED_MAX_NUM_OF_CTX_LL2_CONNS_PF \
(QED_MAX_NUM_OF_LL2_CONNS_PF - QED_MAX_NUM_OF_LEGACY_LL2_CONNS_PF)
#define QED_LL2_LEGACY_CONN_BASE_PF 0
#define QED_LL2_CTX_CONN_BASE_PF QED_MAX_NUM_OF_LEGACY_LL2_CONNS_PF
struct qed_ll2_rx_packet {
struct list_head list_entry;
struct core_rx_bd_with_buff_len *rxq_bd;
dma_addr_t rx_buf_addr;
u16 buf_length;
void *cookie;
u8 placement_offset;
u16 parse_flags;
u16 packet_length;
u16 vlan;
u32 opaque_data[2];
};
struct qed_ll2_tx_packet {
struct list_head list_entry;
u16 bd_used;
bool notify_fw;
void *cookie;
/* Flexible Array of bds_set determined by max_bds_per_packet */
struct {
struct core_tx_bd *txq_bd;
dma_addr_t tx_frag;
u16 frag_len;
} bds_set[];
};
struct qed_ll2_rx_queue {
/* Lock protecting the Rx queue manipulation */
spinlock_t lock;
struct qed_chain rxq_chain;
struct qed_chain rcq_chain;
u8 rx_sb_index;
u8 ctx_based;
bool b_cb_registered;
__le16 *p_fw_cons;
struct list_head active_descq;
struct list_head free_descq;
struct list_head posting_descq;
struct qed_ll2_rx_packet *descq_array;
void __iomem *set_prod_addr;
struct core_pwm_prod_update_data db_data;
};
struct qed_ll2_tx_queue {
/* Lock protecting the Tx queue manipulation */
spinlock_t lock;
struct qed_chain txq_chain;
u8 tx_sb_index;
bool b_cb_registered;
__le16 *p_fw_cons;
struct list_head active_descq;
struct list_head free_descq;
struct list_head sending_descq;
u16 cur_completing_bd_idx;
void __iomem *doorbell_addr;
struct core_db_data db_msg;
u16 bds_idx;
u16 cur_send_frag_num;
u16 cur_completing_frag_num;
bool b_completing_packet;
void *descq_mem; /* memory for variable sized qed_ll2_tx_packet*/
struct qed_ll2_tx_packet *cur_send_packet;
struct qed_ll2_tx_packet cur_completing_packet;
};
struct qed_ll2_info {
/* Lock protecting the state of LL2 */
struct mutex mutex;
struct qed_ll2_acquire_data_inputs input;
u32 cid;
u8 my_id;
u8 queue_id;
u8 tx_stats_id;
bool b_active;
enum core_tx_dest tx_dest;
u8 tx_stats_en;
bool main_func_queue;
struct qed_ll2_rx_queue rx_queue;
struct qed_ll2_tx_queue tx_queue;
struct qed_ll2_cbs cbs;
};
extern const struct qed_ll2_ops qed_ll2_ops_pass;
/**
* qed_ll2_acquire_connection(): Allocate resources,
* starts rx & tx (if relevant) queues pair.
* Provides connecion handler as output
* parameter.
*
* @cxt: Pointer to the hw-function [opaque to some].
* @data: Describes connection parameters.
*
* Return: Int.
*/
int qed_ll2_acquire_connection(void *cxt, struct qed_ll2_acquire_data *data);
/**
* qed_ll2_establish_connection(): start previously allocated LL2 queues pair
*
* @cxt: Pointer to the hw-function [opaque to some].
* @connection_handle: LL2 connection's handle obtained from
* qed_ll2_require_connection.
*
* Return: 0 on success, failure otherwise.
*/
int qed_ll2_establish_connection(void *cxt, u8 connection_handle);
/**
* qed_ll2_post_rx_buffer(): Submit buffers to LL2 Rx queue.
*
* @cxt: Pointer to the hw-function [opaque to some].
* @connection_handle: LL2 connection's handle obtained from
* qed_ll2_require_connection.
* @addr: RX (physical address) buffers to submit.
* @buf_len: Buffer Len.
* @cookie: Cookie.
* @notify_fw: Produce corresponding Rx BD immediately.
*
* Return: 0 on success, failure otherwise.
*/
int qed_ll2_post_rx_buffer(void *cxt,
u8 connection_handle,
dma_addr_t addr,
u16 buf_len, void *cookie, u8 notify_fw);
/**
* qed_ll2_prepare_tx_packet(): Request for start Tx BD
* to prepare Tx packet submission to FW.
*
* @cxt: Pointer to the hw-function [opaque to some].
* @connection_handle: Connection handle.
* @pkt: Info regarding the tx packet.
* @notify_fw: Issue doorbell to fw for this packet.
*
* Return: 0 on success, failure otherwise.
*/
int qed_ll2_prepare_tx_packet(void *cxt,
u8 connection_handle,
struct qed_ll2_tx_pkt_info *pkt,
bool notify_fw);
/**
* qed_ll2_release_connection(): Releases resources allocated for LL2
* connection.
*
* @cxt: Pointer to the hw-function [opaque to some].
* @connection_handle: LL2 connection's handle obtained from
* qed_ll2_require_connection.
*
* Return: Void.
*/
void qed_ll2_release_connection(void *cxt, u8 connection_handle);
/**
* qed_ll2_set_fragment_of_tx_packet(): Provides fragments to fill
* Tx BD of BDs requested by
* qed_ll2_prepare_tx_packet
*
* @cxt: Pointer to the hw-function [opaque to some].
* @connection_handle: LL2 connection's handle obtained from
* qed_ll2_require_connection.
* @addr: Address.
* @nbytes: Number of bytes.
*
* Return: 0 on success, failure otherwise.
*/
int qed_ll2_set_fragment_of_tx_packet(void *cxt,
u8 connection_handle,
dma_addr_t addr, u16 nbytes);
/**
* qed_ll2_terminate_connection(): Stops Tx/Rx queues
*
* @cxt: Pointer to the hw-function [opaque to some].
* @connection_handle: LL2 connection's handle obtained from
* qed_ll2_require_connection.
*
* Return: 0 on success, failure otherwise.
*/
int qed_ll2_terminate_connection(void *cxt, u8 connection_handle);
/**
* qed_ll2_get_stats(): Get LL2 queue's statistics
*
* @cxt: Pointer to the hw-function [opaque to some].
* @connection_handle: LL2 connection's handle obtained from
* qed_ll2_require_connection.
* @p_stats: Pointer Status.
*
* Return: 0 on success, failure otherwise.
*/
int qed_ll2_get_stats(void *cxt,
u8 connection_handle, struct qed_ll2_stats *p_stats);
/**
* qed_ll2_alloc(): Allocates LL2 connections set.
*
* @p_hwfn: HW device data.
*
* Return: Int.
*/
int qed_ll2_alloc(struct qed_hwfn *p_hwfn);
/**
* qed_ll2_setup(): Inits LL2 connections set.
*
* @p_hwfn: HW device data.
*
* Return: Void.
*
*/
void qed_ll2_setup(struct qed_hwfn *p_hwfn);
/**
* qed_ll2_free(): Releases LL2 connections set
*
* @p_hwfn: HW device data.
*
* Return: Void.
*
*/
void qed_ll2_free(struct qed_hwfn *p_hwfn);
#endif
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