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 void mlx5_wq_cyc_wqe_dump(struct mlx5_wq_cyc *wq, u16 ix, u8 nstrides);
84 int mlx5_wq_qp_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
85 void *qpc, struct mlx5_wq_qp *wq,
86 struct mlx5_wq_ctrl *wq_ctrl);
88 int mlx5_cqwq_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
89 void *cqc, struct mlx5_cqwq *wq,
90 struct mlx5_wq_ctrl *wq_ctrl);
92 int mlx5_wq_ll_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
93 void *wqc, struct mlx5_wq_ll *wq,
94 struct mlx5_wq_ctrl *wq_ctrl);
96 void mlx5_wq_destroy(struct mlx5_wq_ctrl *wq_ctrl);
98 static inline u32 mlx5_wq_cyc_get_size(struct mlx5_wq_cyc *wq)
100 return (u32)wq->fbc.sz_m1 + 1;
103 static inline int mlx5_wq_cyc_is_full(struct mlx5_wq_cyc *wq)
105 return wq->cur_sz == wq->sz;
108 static inline int mlx5_wq_cyc_missing(struct mlx5_wq_cyc *wq)
110 return wq->sz - wq->cur_sz;
113 static inline int mlx5_wq_cyc_is_empty(struct mlx5_wq_cyc *wq)
118 static inline void mlx5_wq_cyc_push(struct mlx5_wq_cyc *wq)
124 static inline void mlx5_wq_cyc_push_n(struct mlx5_wq_cyc *wq, u8 n)
130 static inline void mlx5_wq_cyc_pop(struct mlx5_wq_cyc *wq)
135 static inline void mlx5_wq_cyc_update_db_record(struct mlx5_wq_cyc *wq)
137 *wq->db = cpu_to_be32(wq->wqe_ctr);
140 static inline u16 mlx5_wq_cyc_ctr2ix(struct mlx5_wq_cyc *wq, u16 ctr)
142 return ctr & wq->fbc.sz_m1;
145 static inline u16 mlx5_wq_cyc_get_head(struct mlx5_wq_cyc *wq)
147 return mlx5_wq_cyc_ctr2ix(wq, wq->wqe_ctr);
150 static inline u16 mlx5_wq_cyc_get_tail(struct mlx5_wq_cyc *wq)
152 return mlx5_wq_cyc_ctr2ix(wq, wq->wqe_ctr - wq->cur_sz);
155 static inline void *mlx5_wq_cyc_get_wqe(struct mlx5_wq_cyc *wq, u16 ix)
157 return mlx5_frag_buf_get_wqe(&wq->fbc, ix);
160 static inline u16 mlx5_wq_cyc_get_contig_wqebbs(struct mlx5_wq_cyc *wq, u16 ix)
162 return mlx5_frag_buf_get_idx_last_contig_stride(&wq->fbc, ix) - ix + 1;
165 static inline int mlx5_wq_cyc_cc_bigger(u16 cc1, u16 cc2)
167 int equal = (cc1 == cc2);
168 int smaller = 0x8000 & (cc1 - cc2);
170 return !equal && !smaller;
173 static inline u32 mlx5_cqwq_get_size(struct mlx5_cqwq *wq)
175 return wq->fbc.sz_m1 + 1;
178 static inline u8 mlx5_cqwq_get_log_stride_size(struct mlx5_cqwq *wq)
180 return wq->fbc.log_stride;
183 static inline u32 mlx5_cqwq_ctr2ix(struct mlx5_cqwq *wq, u32 ctr)
185 return ctr & wq->fbc.sz_m1;
188 static inline u32 mlx5_cqwq_get_ci(struct mlx5_cqwq *wq)
190 return mlx5_cqwq_ctr2ix(wq, wq->cc);
193 static inline struct mlx5_cqe64 *mlx5_cqwq_get_wqe(struct mlx5_cqwq *wq, u32 ix)
195 struct mlx5_cqe64 *cqe = mlx5_frag_buf_get_wqe(&wq->fbc, ix);
197 /* For 128B CQEs the data is in the last 64B */
198 cqe += wq->fbc.log_stride == 7;
203 static inline u32 mlx5_cqwq_get_ctr_wrap_cnt(struct mlx5_cqwq *wq, u32 ctr)
205 return ctr >> wq->fbc.log_sz;
208 static inline u32 mlx5_cqwq_get_wrap_cnt(struct mlx5_cqwq *wq)
210 return mlx5_cqwq_get_ctr_wrap_cnt(wq, wq->cc);
213 static inline void mlx5_cqwq_pop(struct mlx5_cqwq *wq)
218 static inline void mlx5_cqwq_update_db_record(struct mlx5_cqwq *wq)
220 *wq->db = cpu_to_be32(wq->cc & 0xffffff);
223 static inline struct mlx5_cqe64 *mlx5_cqwq_get_cqe(struct mlx5_cqwq *wq)
225 u32 ci = mlx5_cqwq_get_ci(wq);
226 struct mlx5_cqe64 *cqe = mlx5_cqwq_get_wqe(wq, ci);
227 u8 cqe_ownership_bit = cqe->op_own & MLX5_CQE_OWNER_MASK;
228 u8 sw_ownership_val = mlx5_cqwq_get_wrap_cnt(wq) & 1;
230 if (cqe_ownership_bit != sw_ownership_val)
233 /* ensure cqe content is read after cqe ownership bit */
239 static inline u32 mlx5_wq_ll_get_size(struct mlx5_wq_ll *wq)
241 return (u32)wq->fbc.sz_m1 + 1;
244 static inline int mlx5_wq_ll_is_full(struct mlx5_wq_ll *wq)
246 return wq->cur_sz == wq->fbc.sz_m1;
249 static inline int mlx5_wq_ll_is_empty(struct mlx5_wq_ll *wq)
254 static inline int mlx5_wq_ll_missing(struct mlx5_wq_ll *wq)
256 return wq->fbc.sz_m1 - wq->cur_sz;
259 static inline void *mlx5_wq_ll_get_wqe(struct mlx5_wq_ll *wq, u16 ix)
261 return mlx5_frag_buf_get_wqe(&wq->fbc, ix);
264 static inline u16 mlx5_wq_ll_get_wqe_next_ix(struct mlx5_wq_ll *wq, u16 ix)
266 struct mlx5_wqe_srq_next_seg *wqe = mlx5_wq_ll_get_wqe(wq, ix);
268 return be16_to_cpu(wqe->next_wqe_index);
271 static inline void mlx5_wq_ll_push(struct mlx5_wq_ll *wq, u16 head_next)
273 wq->head = head_next;
278 static inline void mlx5_wq_ll_pop(struct mlx5_wq_ll *wq, __be16 ix,
279 __be16 *next_tail_next)
282 wq->tail_next = next_tail_next;
286 static inline void mlx5_wq_ll_update_db_record(struct mlx5_wq_ll *wq)
288 *wq->db = cpu_to_be32(wq->wqe_ctr);
291 #endif /* __MLX5_WQ_H__ */