linux_kernel/drivers/net/ethernet/qlogic/qed/qed_cxt.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_CXT_H
#define _QED_CXT_H

#include <linux/types.h>
#include <linux/slab.h>
#include <linux/qed/qed_if.h>
#include "qed_hsi.h"
#include "qed.h"

struct qed_cxt_info {
	void			*p_cxt;
	u32			iid;
	enum protocol_type	type;
};

#define MAX_TID_BLOCKS                  512
struct qed_tid_mem {
	u32 tid_size;
	u32 num_tids_per_block;
	u32 waste;
	u8 *blocks[MAX_TID_BLOCKS];	/* 4K */
};

/**
 * @brief qedo_cid_get_cxt_info - Returns the context info for a specific cid
 *
 *
 * @param p_hwfn
 * @param p_info in/out
 *
 * @return int
 */
int qed_cxt_get_cid_info(struct qed_hwfn *p_hwfn,
			 struct qed_cxt_info *p_info);

/**
 * @brief qed_cxt_get_tid_mem_info
 *
 * @param p_hwfn
 * @param p_info
 *
 * @return int
 */
int qed_cxt_get_tid_mem_info(struct qed_hwfn *p_hwfn,
			     struct qed_tid_mem *p_info);

#define QED_CXT_ISCSI_TID_SEG	PROTOCOLID_ISCSI
#define QED_CXT_ROCE_TID_SEG	PROTOCOLID_ROCE
#define QED_CXT_FCOE_TID_SEG	PROTOCOLID_FCOE
enum qed_cxt_elem_type {
	QED_ELEM_CXT,
	QED_ELEM_SRQ,
	QED_ELEM_TASK
};

u32 qed_cxt_get_proto_cid_count(struct qed_hwfn *p_hwfn,
				enum protocol_type type, u32 *vf_cid);

/**
 * @brief qed_cxt_set_pf_params - Set the PF params for cxt init
 *
 * @param p_hwfn
 * @param rdma_tasks - requested maximum
 * @return int
 */
int qed_cxt_set_pf_params(struct qed_hwfn *p_hwfn, u32 rdma_tasks);

/**
 * @brief qed_cxt_cfg_ilt_compute - compute ILT init parameters
 *
 * @param p_hwfn
 * @param last_line
 *
 * @return int
 */
int qed_cxt_cfg_ilt_compute(struct qed_hwfn *p_hwfn, u32 *last_line);

/**
 * @brief qed_cxt_cfg_ilt_compute_excess - how many lines can be decreased
 *
 * @param p_hwfn
 * @param used_lines
 */
u32 qed_cxt_cfg_ilt_compute_excess(struct qed_hwfn *p_hwfn, u32 used_lines);

/**
 * @brief qed_cxt_mngr_alloc - Allocate and init the context manager struct
 *
 * @param p_hwfn
 *
 * @return int
 */
int qed_cxt_mngr_alloc(struct qed_hwfn *p_hwfn);

/**
 * @brief qed_cxt_mngr_free
 *
 * @param p_hwfn
 */
void qed_cxt_mngr_free(struct qed_hwfn *p_hwfn);

/**
 * @brief qed_cxt_tables_alloc - Allocate ILT shadow, Searcher T2, acquired map
 *
 * @param p_hwfn
 *
 * @return int
 */
int qed_cxt_tables_alloc(struct qed_hwfn *p_hwfn);

/**
 * @brief qed_cxt_mngr_setup - Reset the acquired CIDs
 *
 * @param p_hwfn
 */
void qed_cxt_mngr_setup(struct qed_hwfn *p_hwfn);

/**
 * @brief qed_cxt_hw_init_common - Initailze ILT and DQ, common phase, per path.
 *
 *
 *
 * @param p_hwfn
 */
void qed_cxt_hw_init_common(struct qed_hwfn *p_hwfn);

/**
 * @brief qed_cxt_hw_init_pf - Initailze ILT and DQ, PF phase, per path.
 *
 * @param p_hwfn
 * @param p_ptt
 */
void qed_cxt_hw_init_pf(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt);

/**
 * @brief qed_qm_init_pf - Initailze the QM PF phase, per path
 *
 * @param p_hwfn
 * @param p_ptt
 * @param is_pf_loading
 */
void qed_qm_init_pf(struct qed_hwfn *p_hwfn,
		    struct qed_ptt *p_ptt, bool is_pf_loading);

/**
 * @brief Reconfigures QM pf on the fly
 *
 * @param p_hwfn
 * @param p_ptt
 *
 * @return int
 */
int qed_qm_reconf(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt);

#define QED_CXT_PF_CID (0xff)

/**
 * @brief qed_cxt_release - Release a cid
 *
 * @param p_hwfn
 * @param cid
 */
void qed_cxt_release_cid(struct qed_hwfn *p_hwfn, u32 cid);

/**
 * @brief qed_cxt_release - Release a cid belonging to a vf-queue
 *
 * @param p_hwfn
 * @param cid
 * @param vfid - engine relative index. QED_CXT_PF_CID if belongs to PF
 */
void _qed_cxt_release_cid(struct qed_hwfn *p_hwfn, u32 cid, u8 vfid);

/**
 * @brief qed_cxt_acquire - Acquire a new cid of a specific protocol type
 *
 * @param p_hwfn
 * @param type
 * @param p_cid
 *
 * @return int
 */
int qed_cxt_acquire_cid(struct qed_hwfn *p_hwfn,
			enum protocol_type type, u32 *p_cid);

/**
 * @brief _qed_cxt_acquire - Acquire a new cid of a specific protocol type
 *                           for a vf-queue
 *
 * @param p_hwfn
 * @param type
 * @param p_cid
 * @param vfid - engine relative index. QED_CXT_PF_CID if belongs to PF
 *
 * @return int
 */
int _qed_cxt_acquire_cid(struct qed_hwfn *p_hwfn,
			 enum protocol_type type, u32 *p_cid, u8 vfid);

int qed_cxt_dynamic_ilt_alloc(struct qed_hwfn *p_hwfn,
			      enum qed_cxt_elem_type elem_type, u32 iid);
u32 qed_cxt_get_proto_tid_count(struct qed_hwfn *p_hwfn,
				enum protocol_type type);
u32 qed_cxt_get_proto_cid_start(struct qed_hwfn *p_hwfn,
				enum protocol_type type);
u32 qed_cxt_get_srq_count(struct qed_hwfn *p_hwfn);
int qed_cxt_free_proto_ilt(struct qed_hwfn *p_hwfn, enum protocol_type proto);

#define QED_CTX_WORKING_MEM 0
#define QED_CTX_FL_MEM 1
int qed_cxt_get_task_ctx(struct qed_hwfn *p_hwfn,
			 u32 tid, u8 ctx_type, void **task_ctx);
#endif