drivers/net/ethernet/mellanox/mlx5/core/wq.h - linux - Git at Google

 /*
  * Copyright (c) 2013-2015, Mellanox Technologies, Ltd.  All rights reserved.
  *
  * 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 __MLX5_WQ_H__
 #define __MLX5_WQ_H__

 #include <linux/mlx5/mlx5_ifc.h>
 #include <linux/mlx5/cq.h>
 #include <linux/mlx5/qp.h>

 struct mlx5_wq_param {
 	int		buf_numa_node;
 	int		db_numa_node;
 };

 struct mlx5_wq_ctrl {
 	struct mlx5_core_dev	*mdev;
 	struct mlx5_frag_buf	buf;
 	struct mlx5_db		db;
 };

 struct mlx5_wq_cyc {
 	struct mlx5_frag_buf_ctrl fbc;
 	__be32			*db;
 	u16			sz;
 	u16			wqe_ctr;
 	u16			cur_sz;
 };

 struct mlx5_wq_qp {
 	struct mlx5_wq_cyc	rq;
 	struct mlx5_wq_cyc	sq;
 };

 struct mlx5_cqwq {
 	struct mlx5_frag_buf_ctrl fbc;
 	__be32			  *db;
 	u32			  cc; /* consumer counter */
 };

 struct mlx5_wq_ll {
 	struct mlx5_frag_buf_ctrl fbc;
 	__be32			*db;
 	__be16			*tail_next;
 	u16			head;
 	u16			wqe_ctr;
 	u16			cur_sz;
 };

 int mlx5_wq_cyc_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
 		       void *wqc, struct mlx5_wq_cyc *wq,
 		       struct mlx5_wq_ctrl *wq_ctrl);
 void mlx5_wq_cyc_wqe_dump(struct mlx5_wq_cyc *wq, u16 ix, u8 nstrides);
 void mlx5_wq_cyc_reset(struct mlx5_wq_cyc *wq);

 int mlx5_wq_qp_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
 		      void *qpc, struct mlx5_wq_qp *wq,
 		      struct mlx5_wq_ctrl *wq_ctrl);

 int mlx5_cqwq_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
 		     void *cqc, struct mlx5_cqwq *wq,
 		     struct mlx5_wq_ctrl *wq_ctrl);

 int mlx5_wq_ll_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
 		      void *wqc, struct mlx5_wq_ll *wq,
 		      struct mlx5_wq_ctrl *wq_ctrl);
 void mlx5_wq_ll_reset(struct mlx5_wq_ll *wq);

 void mlx5_wq_destroy(struct mlx5_wq_ctrl *wq_ctrl);

 static inline u32 mlx5_wq_cyc_get_size(struct mlx5_wq_cyc *wq)
 {
 	return (u32)wq->fbc.sz_m1 + 1;
 }

 static inline int mlx5_wq_cyc_is_full(struct mlx5_wq_cyc *wq)
 {
 	return wq->cur_sz == wq->sz;
 }

 static inline int mlx5_wq_cyc_missing(struct mlx5_wq_cyc *wq)
 {
 	return wq->sz - wq->cur_sz;
 }

 static inline int mlx5_wq_cyc_is_empty(struct mlx5_wq_cyc *wq)
 {
 	return !wq->cur_sz;
 }

 static inline void mlx5_wq_cyc_push(struct mlx5_wq_cyc *wq)
 {
 	wq->wqe_ctr++;
 	wq->cur_sz++;
 }

 static inline void mlx5_wq_cyc_push_n(struct mlx5_wq_cyc *wq, u8 n)
 {
 	wq->wqe_ctr += n;
 	wq->cur_sz += n;
 }

 static inline void mlx5_wq_cyc_pop(struct mlx5_wq_cyc *wq)
 {
 	wq->cur_sz--;
 }

 static inline void mlx5_wq_cyc_update_db_record(struct mlx5_wq_cyc *wq)
 {
 	*wq->db = cpu_to_be32(wq->wqe_ctr);
 }

 static inline u16 mlx5_wq_cyc_ctr2ix(struct mlx5_wq_cyc *wq, u16 ctr)
 {
 	return ctr & wq->fbc.sz_m1;
 }

 static inline u16 mlx5_wq_cyc_get_head(struct mlx5_wq_cyc *wq)
 {
 	return mlx5_wq_cyc_ctr2ix(wq, wq->wqe_ctr);
 }

 static inline u16 mlx5_wq_cyc_get_tail(struct mlx5_wq_cyc *wq)
 {
 	return mlx5_wq_cyc_ctr2ix(wq, wq->wqe_ctr - wq->cur_sz);
 }

 static inline void *mlx5_wq_cyc_get_wqe(struct mlx5_wq_cyc *wq, u16 ix)
 {
 	return mlx5_frag_buf_get_wqe(&wq->fbc, ix);
 }

 static inline u16 mlx5_wq_cyc_get_contig_wqebbs(struct mlx5_wq_cyc *wq, u16 ix)
 {
 	return mlx5_frag_buf_get_idx_last_contig_stride(&wq->fbc, ix) - ix + 1;
 }

 static inline int mlx5_wq_cyc_cc_bigger(u16 cc1, u16 cc2)
 {
 	int equal   = (cc1 == cc2);
 	int smaller = 0x8000 & (cc1 - cc2);

 	return !equal && !smaller;
 }

 static inline u16 mlx5_wq_cyc_get_counter(struct mlx5_wq_cyc *wq)
 {
 	return wq->wqe_ctr;
 }

 static inline u32 mlx5_cqwq_get_size(struct mlx5_cqwq *wq)
 {
 	return wq->fbc.sz_m1 + 1;
 }

 static inline u8 mlx5_cqwq_get_log_stride_size(struct mlx5_cqwq *wq)
 {
 	return wq->fbc.log_stride;
 }

 static inline u32 mlx5_cqwq_ctr2ix(struct mlx5_cqwq *wq, u32 ctr)
 {
 	return ctr & wq->fbc.sz_m1;
 }

 static inline u32 mlx5_cqwq_get_ci(struct mlx5_cqwq *wq)
 {
 	return mlx5_cqwq_ctr2ix(wq, wq->cc);
 }

 static inline struct mlx5_cqe64 *mlx5_cqwq_get_wqe(struct mlx5_cqwq *wq, u32 ix)
 {
 	struct mlx5_cqe64 *cqe = mlx5_frag_buf_get_wqe(&wq->fbc, ix);

 	/* For 128B CQEs the data is in the last 64B */
 	cqe += wq->fbc.log_stride == 7;

 	return cqe;
 }

 static inline u32 mlx5_cqwq_get_ctr_wrap_cnt(struct mlx5_cqwq *wq, u32 ctr)
 {
 	return ctr >> wq->fbc.log_sz;
 }

 static inline u32 mlx5_cqwq_get_wrap_cnt(struct mlx5_cqwq *wq)
 {
 	return mlx5_cqwq_get_ctr_wrap_cnt(wq, wq->cc);
 }

 static inline void mlx5_cqwq_pop(struct mlx5_cqwq *wq)
 {
 	wq->cc++;
 }

 static inline void mlx5_cqwq_update_db_record(struct mlx5_cqwq *wq)
 {
 	*wq->db = cpu_to_be32(wq->cc & 0xffffff);
 }

 static inline struct mlx5_cqe64 *mlx5_cqwq_get_cqe(struct mlx5_cqwq *wq)
 {
 	u32 ci = mlx5_cqwq_get_ci(wq);
 	struct mlx5_cqe64 *cqe = mlx5_cqwq_get_wqe(wq, ci);
 	u8 cqe_ownership_bit = cqe->op_own & MLX5_CQE_OWNER_MASK;
 	u8 sw_ownership_val = mlx5_cqwq_get_wrap_cnt(wq) & 1;

 	if (cqe_ownership_bit != sw_ownership_val)
 		return NULL;

 	/* ensure cqe content is read after cqe ownership bit */
 	dma_rmb();

 	return cqe;
 }

 static inline u32 mlx5_wq_ll_get_size(struct mlx5_wq_ll *wq)
 {
 	return (u32)wq->fbc.sz_m1 + 1;
 }

 static inline int mlx5_wq_ll_is_full(struct mlx5_wq_ll *wq)
 {
 	return wq->cur_sz == wq->fbc.sz_m1;
 }

 static inline int mlx5_wq_ll_is_empty(struct mlx5_wq_ll *wq)
 {
 	return !wq->cur_sz;
 }

 static inline int mlx5_wq_ll_missing(struct mlx5_wq_ll *wq)
 {
 	return wq->fbc.sz_m1 - wq->cur_sz;
 }

 static inline void *mlx5_wq_ll_get_wqe(struct mlx5_wq_ll *wq, u16 ix)
 {
 	return mlx5_frag_buf_get_wqe(&wq->fbc, ix);
 }

 static inline u16 mlx5_wq_ll_get_wqe_next_ix(struct mlx5_wq_ll *wq, u16 ix)
 {
 	struct mlx5_wqe_srq_next_seg *wqe = mlx5_wq_ll_get_wqe(wq, ix);

 	return be16_to_cpu(wqe->next_wqe_index);
 }

 static inline void mlx5_wq_ll_push(struct mlx5_wq_ll *wq, u16 head_next)
 {
 	wq->head = head_next;
 	wq->wqe_ctr++;
 	wq->cur_sz++;
 }

 static inline void mlx5_wq_ll_pop(struct mlx5_wq_ll *wq, __be16 ix,
 				  __be16 *next_tail_next)
 {
 	*wq->tail_next = ix;
 	wq->tail_next = next_tail_next;
 	wq->cur_sz--;
 }

 static inline void mlx5_wq_ll_update_db_record(struct mlx5_wq_ll *wq)
 {
 	*wq->db = cpu_to_be32(wq->wqe_ctr);
 }

 static inline u16 mlx5_wq_ll_get_head(struct mlx5_wq_ll *wq)
 {
 	return wq->head;
 }

 static inline u16 mlx5_wq_ll_get_counter(struct mlx5_wq_ll *wq)
 {
 	return wq->wqe_ctr;
 }

 #endif /* __MLX5_WQ_H__ */
	/*
	* Copyright (c) 2013-2015, Mellanox Technologies, Ltd. All rights reserved.
	*
	* 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 __MLX5_WQ_H__
	#define __MLX5_WQ_H__

	#include <linux/mlx5/mlx5_ifc.h>
	#include <linux/mlx5/cq.h>
	#include <linux/mlx5/qp.h>

	struct mlx5_wq_param {
	int buf_numa_node;
	int db_numa_node;
	};

	struct mlx5_wq_ctrl {
	struct mlx5_core_dev *mdev;
	struct mlx5_frag_buf buf;
	struct mlx5_db db;
	};

	struct mlx5_wq_cyc {
	struct mlx5_frag_buf_ctrl fbc;
	__be32 *db;
	u16 sz;
	u16 wqe_ctr;
	u16 cur_sz;
	};

	struct mlx5_wq_qp {
	struct mlx5_wq_cyc rq;
	struct mlx5_wq_cyc sq;
	};

	struct mlx5_cqwq {
	struct mlx5_frag_buf_ctrl fbc;
	__be32 *db;
	u32 cc; /* consumer counter */
	};

	struct mlx5_wq_ll {
	struct mlx5_frag_buf_ctrl fbc;
	__be32 *db;
	__be16 *tail_next;
	u16 head;
	u16 wqe_ctr;
	u16 cur_sz;
	};

	int mlx5_wq_cyc_create(struct mlx5_core_dev mdev, struct mlx5_wq_param param,
	void wqc, struct mlx5_wq_cyc wq,
	struct mlx5_wq_ctrl *wq_ctrl);
	void mlx5_wq_cyc_wqe_dump(struct mlx5_wq_cyc *wq, u16 ix, u8 nstrides);
	void mlx5_wq_cyc_reset(struct mlx5_wq_cyc *wq);

	int mlx5_wq_qp_create(struct mlx5_core_dev mdev, struct mlx5_wq_param param,
	void qpc, struct mlx5_wq_qp wq,
	struct mlx5_wq_ctrl *wq_ctrl);

	int mlx5_cqwq_create(struct mlx5_core_dev mdev, struct mlx5_wq_param param,
	void cqc, struct mlx5_cqwq wq,
	struct mlx5_wq_ctrl *wq_ctrl);

	int mlx5_wq_ll_create(struct mlx5_core_dev mdev, struct mlx5_wq_param param,
	void wqc, struct mlx5_wq_ll wq,
	struct mlx5_wq_ctrl *wq_ctrl);
	void mlx5_wq_ll_reset(struct mlx5_wq_ll *wq);

	void mlx5_wq_destroy(struct mlx5_wq_ctrl *wq_ctrl);

	static inline u32 mlx5_wq_cyc_get_size(struct mlx5_wq_cyc *wq)
	{
	return (u32)wq->fbc.sz_m1 + 1;
	}

	static inline int mlx5_wq_cyc_is_full(struct mlx5_wq_cyc *wq)
	{
	return wq->cur_sz == wq->sz;
	}

	static inline int mlx5_wq_cyc_missing(struct mlx5_wq_cyc *wq)
	{
	return wq->sz - wq->cur_sz;
	}

	static inline int mlx5_wq_cyc_is_empty(struct mlx5_wq_cyc *wq)
	{
	return !wq->cur_sz;
	}

	static inline void mlx5_wq_cyc_push(struct mlx5_wq_cyc *wq)
	{
	wq->wqe_ctr++;
	wq->cur_sz++;
	}

	static inline void mlx5_wq_cyc_push_n(struct mlx5_wq_cyc *wq, u8 n)
	{
	wq->wqe_ctr += n;
	wq->cur_sz += n;
	}

	static inline void mlx5_wq_cyc_pop(struct mlx5_wq_cyc *wq)
	{
	wq->cur_sz--;
	}

	static inline void mlx5_wq_cyc_update_db_record(struct mlx5_wq_cyc *wq)
	{
	*wq->db = cpu_to_be32(wq->wqe_ctr);
	}

	static inline u16 mlx5_wq_cyc_ctr2ix(struct mlx5_wq_cyc *wq, u16 ctr)
	{
	return ctr & wq->fbc.sz_m1;
	}

	static inline u16 mlx5_wq_cyc_get_head(struct mlx5_wq_cyc *wq)
	{
	return mlx5_wq_cyc_ctr2ix(wq, wq->wqe_ctr);
	}

	static inline u16 mlx5_wq_cyc_get_tail(struct mlx5_wq_cyc *wq)
	{
	return mlx5_wq_cyc_ctr2ix(wq, wq->wqe_ctr - wq->cur_sz);
	}

	static inline void mlx5_wq_cyc_get_wqe(struct mlx5_wq_cyc wq, u16 ix)
	{
	return mlx5_frag_buf_get_wqe(&wq->fbc, ix);
	}

	static inline u16 mlx5_wq_cyc_get_contig_wqebbs(struct mlx5_wq_cyc *wq, u16 ix)
	{
	return mlx5_frag_buf_get_idx_last_contig_stride(&wq->fbc, ix) - ix + 1;
	}

	static inline int mlx5_wq_cyc_cc_bigger(u16 cc1, u16 cc2)
	{
	int equal = (cc1 == cc2);
	int smaller = 0x8000 & (cc1 - cc2);

	return !equal && !smaller;
	}

	static inline u16 mlx5_wq_cyc_get_counter(struct mlx5_wq_cyc *wq)
	{
	return wq->wqe_ctr;
	}

	static inline u32 mlx5_cqwq_get_size(struct mlx5_cqwq *wq)
	{
	return wq->fbc.sz_m1 + 1;
	}

	static inline u8 mlx5_cqwq_get_log_stride_size(struct mlx5_cqwq *wq)
	{
	return wq->fbc.log_stride;
	}

	static inline u32 mlx5_cqwq_ctr2ix(struct mlx5_cqwq *wq, u32 ctr)
	{
	return ctr & wq->fbc.sz_m1;
	}

	static inline u32 mlx5_cqwq_get_ci(struct mlx5_cqwq *wq)
	{
	return mlx5_cqwq_ctr2ix(wq, wq->cc);
	}

	static inline struct mlx5_cqe64 mlx5_cqwq_get_wqe(struct mlx5_cqwq wq, u32 ix)
	{
	struct mlx5_cqe64 *cqe = mlx5_frag_buf_get_wqe(&wq->fbc, ix);

	/* For 128B CQEs the data is in the last 64B */
	cqe += wq->fbc.log_stride == 7;

	return cqe;
	}

	static inline u32 mlx5_cqwq_get_ctr_wrap_cnt(struct mlx5_cqwq *wq, u32 ctr)
	{
	return ctr >> wq->fbc.log_sz;
	}

	static inline u32 mlx5_cqwq_get_wrap_cnt(struct mlx5_cqwq *wq)
	{
	return mlx5_cqwq_get_ctr_wrap_cnt(wq, wq->cc);
	}

	static inline void mlx5_cqwq_pop(struct mlx5_cqwq *wq)
	{
	wq->cc++;
	}

	static inline void mlx5_cqwq_update_db_record(struct mlx5_cqwq *wq)
	{
	*wq->db = cpu_to_be32(wq->cc & 0xffffff);
	}

	static inline struct mlx5_cqe64 mlx5_cqwq_get_cqe(struct mlx5_cqwq wq)
	{
	u32 ci = mlx5_cqwq_get_ci(wq);
	struct mlx5_cqe64 *cqe = mlx5_cqwq_get_wqe(wq, ci);
	u8 cqe_ownership_bit = cqe->op_own & MLX5_CQE_OWNER_MASK;
	u8 sw_ownership_val = mlx5_cqwq_get_wrap_cnt(wq) & 1;

	if (cqe_ownership_bit != sw_ownership_val)
	return NULL;

	/* ensure cqe content is read after cqe ownership bit */
	dma_rmb();

	return cqe;
	}

	static inline u32 mlx5_wq_ll_get_size(struct mlx5_wq_ll *wq)
	{
	return (u32)wq->fbc.sz_m1 + 1;
	}

	static inline int mlx5_wq_ll_is_full(struct mlx5_wq_ll *wq)
	{
	return wq->cur_sz == wq->fbc.sz_m1;
	}

	static inline int mlx5_wq_ll_is_empty(struct mlx5_wq_ll *wq)
	{
	return !wq->cur_sz;
	}

	static inline int mlx5_wq_ll_missing(struct mlx5_wq_ll *wq)
	{
	return wq->fbc.sz_m1 - wq->cur_sz;
	}

	static inline void mlx5_wq_ll_get_wqe(struct mlx5_wq_ll wq, u16 ix)
	{
	return mlx5_frag_buf_get_wqe(&wq->fbc, ix);
	}

	static inline u16 mlx5_wq_ll_get_wqe_next_ix(struct mlx5_wq_ll *wq, u16 ix)
	{
	struct mlx5_wqe_srq_next_seg *wqe = mlx5_wq_ll_get_wqe(wq, ix);

	return be16_to_cpu(wqe->next_wqe_index);
	}

	static inline void mlx5_wq_ll_push(struct mlx5_wq_ll *wq, u16 head_next)
	{
	wq->head = head_next;
	wq->wqe_ctr++;
	wq->cur_sz++;
	}

	static inline void mlx5_wq_ll_pop(struct mlx5_wq_ll *wq, __be16 ix,
	__be16 *next_tail_next)
	{
	*wq->tail_next = ix;
	wq->tail_next = next_tail_next;
	wq->cur_sz--;
	}

	static inline void mlx5_wq_ll_update_db_record(struct mlx5_wq_ll *wq)
	{
	*wq->db = cpu_to_be32(wq->wqe_ctr);
	}

	static inline u16 mlx5_wq_ll_get_head(struct mlx5_wq_ll *wq)
	{
	return wq->head;
	}

	static inline u16 mlx5_wq_ll_get_counter(struct mlx5_wq_ll *wq)
	{
	return wq->wqe_ctr;
	}

	#endif /* __MLX5_WQ_H__ */