Release 4.16 drivers/net/ethernet/qlogic/qed/qed_ll2.h
/* QLogic qed NIC Driver
* Copyright (c) 2015-2017 QLogic Corporation
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and /or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#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)
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[1];
};
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;
bool b_cb_registred;
__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 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_registred;
__le16 *p_fw_cons;
struct list_head active_descq;
struct list_head free_descq;
struct list_head sending_descq;
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;
u16 cur_completing_bd_idx;
void __iomem *doorbell_addr;
u16 bds_idx;
u16 cur_send_frag_num;
u16 cur_completing_frag_num;
bool b_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;
};
/**
* @brief qed_ll2_acquire_connection - allocate resources,
* starts rx & tx (if relevant) queues pair. Provides
* connecion handler as output parameter.
*
*
* @param cxt - pointer to the hw-function [opaque to some]
* @param data - describes connection parameters
* @return int
*/
int qed_ll2_acquire_connection(void *cxt, struct qed_ll2_acquire_data *data);
/**
* @brief qed_ll2_establish_connection - start previously
* allocated LL2 queues pair
*
* @param cxt - pointer to the hw-function [opaque to some]
* @param p_ptt
* @param 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);
/**
* @brief qed_ll2_post_rx_buffers - submit buffers to LL2 Rx queue.
*
* @param cxt - pointer to the hw-function [opaque to some]
* @param connection_handle LL2 connection's handle obtained from
* qed_ll2_require_connection
* @param addr rx (physical address) buffers to submit
* @param cookie
* @param 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);
/**
* @brief qed_ll2_prepare_tx_packet - request for start Tx BD
* to prepare Tx packet submission to FW.
*
* @param cxt - pointer to the hw-function [opaque to some]
* @param connection_handle
* @param pkt - info regarding the tx packet
* @param 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);
/**
* @brief qed_ll2_release_connection - releases resources
* allocated for LL2 connection
*
* @param cxt - pointer to the hw-function [opaque to some]
* @param connection_handle LL2 connection's handle obtained from
* qed_ll2_require_connection
*/
void qed_ll2_release_connection(void *cxt, u8 connection_handle);
/**
* @brief qed_ll2_set_fragment_of_tx_packet - provides fragments to fill
* Tx BD of BDs requested by
* qed_ll2_prepare_tx_packet
*
* @param cxt - pointer to the hw-function [opaque to some]
* @param connection_handle LL2 connection's handle
* obtained from
* qed_ll2_require_connection
* @param addr
* @param nbytes
*
* @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);
/**
* @brief qed_ll2_terminate_connection - stops Tx/Rx queues
*
*
* @param cxt - pointer to the hw-function [opaque to some]
* @param 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);
/**
* @brief qed_ll2_get_stats - get LL2 queue's statistics
*
*
* @param cxt - pointer to the hw-function [opaque to some]
* @param connection_handle LL2 connection's handle obtained from
* qed_ll2_require_connection
* @param p_stats
*
* @return 0 on success, failure otherwise
*/
int qed_ll2_get_stats(void *cxt,
u8 connection_handle, struct qed_ll2_stats *p_stats);
/**
* @brief qed_ll2_alloc - Allocates LL2 connections set
*
* @param p_hwfn
*
* @return int
*/
int qed_ll2_alloc(struct qed_hwfn *p_hwfn);
/**
* @brief qed_ll2_setup - Inits LL2 connections set
*
* @param p_hwfn
*
*/
void qed_ll2_setup(struct qed_hwfn *p_hwfn);
/**
* @brief qed_ll2_free - Releases LL2 connections set
*
* @param p_hwfn
*
*/
void qed_ll2_free(struct qed_hwfn *p_hwfn);
#endif
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