2 * Copyright (c) 2013-2015, Mellanox Technologies, Ltd. All rights reserved.
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36 #include <linux/mlx5/mlx5_ifc.h>
37 #include <linux/mlx5/cq.h>
38 #include <linux/mlx5/qp.h>
40 struct mlx5_wq_param {
46 struct mlx5_core_dev *mdev;
47 struct mlx5_frag_buf buf;
52 struct mlx5_frag_buf_ctrl fbc;
57 struct mlx5_wq_cyc rq;
58 struct mlx5_wq_cyc sq;
62 struct mlx5_frag_buf_ctrl fbc;
64 u32 cc; /* consumer counter */
68 struct mlx5_frag_buf_ctrl fbc;
76 int mlx5_wq_cyc_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
77 void *wqc, struct mlx5_wq_cyc *wq,
78 struct mlx5_wq_ctrl *wq_ctrl);
79 u32 mlx5_wq_cyc_get_size(struct mlx5_wq_cyc *wq);
80 u32 mlx5_wq_cyc_get_frag_size(struct mlx5_wq_cyc *wq);
82 int mlx5_wq_qp_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
83 void *qpc, struct mlx5_wq_qp *wq,
84 struct mlx5_wq_ctrl *wq_ctrl);
86 int mlx5_cqwq_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
87 void *cqc, struct mlx5_cqwq *wq,
88 struct mlx5_wq_ctrl *wq_ctrl);
89 u32 mlx5_cqwq_get_size(struct mlx5_cqwq *wq);
91 int mlx5_wq_ll_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
92 void *wqc, struct mlx5_wq_ll *wq,
93 struct mlx5_wq_ctrl *wq_ctrl);
94 u32 mlx5_wq_ll_get_size(struct mlx5_wq_ll *wq);
96 void mlx5_wq_destroy(struct mlx5_wq_ctrl *wq_ctrl);
98 static inline u16 mlx5_wq_cyc_ctr2ix(struct mlx5_wq_cyc *wq, u16 ctr)
100 return ctr & wq->fbc.sz_m1;
103 static inline u16 mlx5_wq_cyc_ctr2fragix(struct mlx5_wq_cyc *wq, u16 ctr)
105 return ctr & wq->fbc.frag_sz_m1;
108 static inline void *mlx5_wq_cyc_get_wqe(struct mlx5_wq_cyc *wq, u16 ix)
110 return mlx5_frag_buf_get_wqe(&wq->fbc, ix);
113 static inline int mlx5_wq_cyc_cc_bigger(u16 cc1, u16 cc2)
115 int equal = (cc1 == cc2);
116 int smaller = 0x8000 & (cc1 - cc2);
118 return !equal && !smaller;
121 static inline u32 mlx5_cqwq_ctr2ix(struct mlx5_cqwq *wq, u32 ctr)
123 return ctr & wq->fbc.sz_m1;
126 static inline u32 mlx5_cqwq_get_ci(struct mlx5_cqwq *wq)
128 return mlx5_cqwq_ctr2ix(wq, wq->cc);
131 static inline void *mlx5_cqwq_get_wqe(struct mlx5_cqwq *wq, u32 ix)
133 return mlx5_frag_buf_get_wqe(&wq->fbc, ix);
136 static inline u32 mlx5_cqwq_get_ctr_wrap_cnt(struct mlx5_cqwq *wq, u32 ctr)
138 return ctr >> wq->fbc.log_sz;
141 static inline u32 mlx5_cqwq_get_wrap_cnt(struct mlx5_cqwq *wq)
143 return mlx5_cqwq_get_ctr_wrap_cnt(wq, wq->cc);
146 static inline void mlx5_cqwq_pop(struct mlx5_cqwq *wq)
151 static inline void mlx5_cqwq_update_db_record(struct mlx5_cqwq *wq)
153 *wq->db = cpu_to_be32(wq->cc & 0xffffff);
156 static inline struct mlx5_cqe64 *mlx5_cqwq_get_cqe(struct mlx5_cqwq *wq)
158 u32 ci = mlx5_cqwq_get_ci(wq);
159 struct mlx5_cqe64 *cqe = mlx5_cqwq_get_wqe(wq, ci);
160 u8 cqe_ownership_bit = cqe->op_own & MLX5_CQE_OWNER_MASK;
161 u8 sw_ownership_val = mlx5_cqwq_get_wrap_cnt(wq) & 1;
163 if (cqe_ownership_bit != sw_ownership_val)
166 /* ensure cqe content is read after cqe ownership bit */
172 static inline int mlx5_wq_ll_is_full(struct mlx5_wq_ll *wq)
174 return wq->cur_sz == wq->fbc.sz_m1;
177 static inline int mlx5_wq_ll_is_empty(struct mlx5_wq_ll *wq)
182 static inline u16 mlx5_wq_ll_ctr2ix(struct mlx5_wq_ll *wq, u16 ctr)
184 return ctr & wq->fbc.sz_m1;
187 static inline void *mlx5_wq_ll_get_wqe(struct mlx5_wq_ll *wq, u16 ix)
189 return mlx5_frag_buf_get_wqe(&wq->fbc, ix);
192 static inline void mlx5_wq_ll_push(struct mlx5_wq_ll *wq, u16 head_next)
194 wq->head = head_next;
199 static inline void mlx5_wq_ll_pop(struct mlx5_wq_ll *wq, __be16 ix,
200 __be16 *next_tail_next)
203 wq->tail_next = next_tail_next;
207 static inline void mlx5_wq_ll_update_db_record(struct mlx5_wq_ll *wq)
209 *wq->db = cpu_to_be32(wq->wqe_ctr);
212 #endif /* __MLX5_WQ_H__ */