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;
60 struct mlx5_wq_cyc rq;
61 struct mlx5_wq_cyc sq;
65 struct mlx5_frag_buf_ctrl fbc;
67 u32 cc; /* consumer counter */
71 struct mlx5_frag_buf_ctrl fbc;
79 int mlx5_wq_cyc_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
80 void *wqc, struct mlx5_wq_cyc *wq,
81 struct mlx5_wq_ctrl *wq_ctrl);
82 u32 mlx5_wq_cyc_get_size(struct mlx5_wq_cyc *wq);
83 u32 mlx5_wq_cyc_get_frag_size(struct mlx5_wq_cyc *wq);
85 int mlx5_wq_qp_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
86 void *qpc, struct mlx5_wq_qp *wq,
87 struct mlx5_wq_ctrl *wq_ctrl);
89 int mlx5_cqwq_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
90 void *cqc, struct mlx5_cqwq *wq,
91 struct mlx5_wq_ctrl *wq_ctrl);
92 u32 mlx5_cqwq_get_size(struct mlx5_cqwq *wq);
94 int mlx5_wq_ll_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
95 void *wqc, struct mlx5_wq_ll *wq,
96 struct mlx5_wq_ctrl *wq_ctrl);
97 u32 mlx5_wq_ll_get_size(struct mlx5_wq_ll *wq);
99 void mlx5_wq_destroy(struct mlx5_wq_ctrl *wq_ctrl);
101 static inline int mlx5_wq_cyc_is_full(struct mlx5_wq_cyc *wq)
103 return wq->cur_sz == wq->sz;
106 static inline int mlx5_wq_cyc_missing(struct mlx5_wq_cyc *wq)
108 return wq->sz - wq->cur_sz;
111 static inline int mlx5_wq_cyc_is_empty(struct mlx5_wq_cyc *wq)
116 static inline void mlx5_wq_cyc_push(struct mlx5_wq_cyc *wq)
122 static inline void mlx5_wq_cyc_push_n(struct mlx5_wq_cyc *wq, u8 n)
128 static inline void mlx5_wq_cyc_pop(struct mlx5_wq_cyc *wq)
133 static inline void mlx5_wq_cyc_update_db_record(struct mlx5_wq_cyc *wq)
135 *wq->db = cpu_to_be32(wq->wqe_ctr);
138 static inline u16 mlx5_wq_cyc_ctr2ix(struct mlx5_wq_cyc *wq, u16 ctr)
140 return ctr & wq->fbc.sz_m1;
143 static inline u16 mlx5_wq_cyc_ctr2fragix(struct mlx5_wq_cyc *wq, u16 ctr)
145 return ctr & wq->fbc.frag_sz_m1;
148 static inline u16 mlx5_wq_cyc_get_head(struct mlx5_wq_cyc *wq)
150 return mlx5_wq_cyc_ctr2ix(wq, wq->wqe_ctr);
153 static inline u16 mlx5_wq_cyc_get_tail(struct mlx5_wq_cyc *wq)
155 return mlx5_wq_cyc_ctr2ix(wq, wq->wqe_ctr - wq->cur_sz);
158 static inline void *mlx5_wq_cyc_get_wqe(struct mlx5_wq_cyc *wq, u16 ix)
160 return mlx5_frag_buf_get_wqe(&wq->fbc, ix);
163 static inline int mlx5_wq_cyc_cc_bigger(u16 cc1, u16 cc2)
165 int equal = (cc1 == cc2);
166 int smaller = 0x8000 & (cc1 - cc2);
168 return !equal && !smaller;
171 static inline u32 mlx5_cqwq_ctr2ix(struct mlx5_cqwq *wq, u32 ctr)
173 return ctr & wq->fbc.sz_m1;
176 static inline u32 mlx5_cqwq_get_ci(struct mlx5_cqwq *wq)
178 return mlx5_cqwq_ctr2ix(wq, wq->cc);
181 static inline void *mlx5_cqwq_get_wqe(struct mlx5_cqwq *wq, u32 ix)
183 return mlx5_frag_buf_get_wqe(&wq->fbc, ix);
186 static inline u32 mlx5_cqwq_get_ctr_wrap_cnt(struct mlx5_cqwq *wq, u32 ctr)
188 return ctr >> wq->fbc.log_sz;
191 static inline u32 mlx5_cqwq_get_wrap_cnt(struct mlx5_cqwq *wq)
193 return mlx5_cqwq_get_ctr_wrap_cnt(wq, wq->cc);
196 static inline void mlx5_cqwq_pop(struct mlx5_cqwq *wq)
201 static inline void mlx5_cqwq_update_db_record(struct mlx5_cqwq *wq)
203 *wq->db = cpu_to_be32(wq->cc & 0xffffff);
206 static inline struct mlx5_cqe64 *mlx5_cqwq_get_cqe(struct mlx5_cqwq *wq)
208 u32 ci = mlx5_cqwq_get_ci(wq);
209 struct mlx5_cqe64 *cqe = mlx5_cqwq_get_wqe(wq, ci);
210 u8 cqe_ownership_bit = cqe->op_own & MLX5_CQE_OWNER_MASK;
211 u8 sw_ownership_val = mlx5_cqwq_get_wrap_cnt(wq) & 1;
213 if (cqe_ownership_bit != sw_ownership_val)
216 /* ensure cqe content is read after cqe ownership bit */
222 static inline int mlx5_wq_ll_is_full(struct mlx5_wq_ll *wq)
224 return wq->cur_sz == wq->fbc.sz_m1;
227 static inline int mlx5_wq_ll_is_empty(struct mlx5_wq_ll *wq)
232 static inline int mlx5_wq_ll_missing(struct mlx5_wq_ll *wq)
234 return wq->fbc.sz_m1 - wq->cur_sz;
237 static inline void *mlx5_wq_ll_get_wqe(struct mlx5_wq_ll *wq, u16 ix)
239 return mlx5_frag_buf_get_wqe(&wq->fbc, ix);
242 static inline void mlx5_wq_ll_push(struct mlx5_wq_ll *wq, u16 head_next)
244 wq->head = head_next;
249 static inline void mlx5_wq_ll_pop(struct mlx5_wq_ll *wq, __be16 ix,
250 __be16 *next_tail_next)
253 wq->tail_next = next_tail_next;
257 static inline void mlx5_wq_ll_update_db_record(struct mlx5_wq_ll *wq)
259 *wq->db = cpu_to_be32(wq->wqe_ctr);
262 #endif /* __MLX5_WQ_H__ */