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1/*2 * Copyright (c) 2013-2015, Mellanox Technologies, Ltd. All rights reserved.3 *4 * This software is available to you under a choice of one of two5 * licenses. You may choose to be licensed under the terms of the GNU6 * General Public License (GPL) Version 2, available from the file7 * COPYING in the main directory of this source tree, or the8 * OpenIB.org BSD license below:9 *10 * Redistribution and use in source and binary forms, with or11 * without modification, are permitted provided that the following12 * conditions are met:13 *14 * - Redistributions of source code must retain the above15 * copyright notice, this list of conditions and the following16 * disclaimer.17 *18 * - Redistributions in binary form must reproduce the above19 * copyright notice, this list of conditions and the following20 * disclaimer in the documentation and/or other materials21 * provided with the distribution.22 *23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE30 * SOFTWARE.31 */32 33#ifndef __MLX5_WQ_H__34#define __MLX5_WQ_H__35 36#include <linux/mlx5/mlx5_ifc.h>37#include <linux/mlx5/cq.h>38#include <linux/mlx5/qp.h>39 40struct mlx5_wq_param {41 int buf_numa_node;42 int db_numa_node;43};44 45struct mlx5_wq_ctrl {46 struct mlx5_core_dev *mdev;47 struct mlx5_frag_buf buf;48 struct mlx5_db db;49};50 51struct mlx5_wq_cyc {52 struct mlx5_frag_buf_ctrl fbc;53 __be32 *db;54 u16 sz;55 u16 wqe_ctr;56 u16 cur_sz;57};58 59struct mlx5_wq_qp {60 struct mlx5_wq_cyc rq;61 struct mlx5_wq_cyc sq;62};63 64struct mlx5_cqwq {65 struct mlx5_frag_buf_ctrl fbc;66 __be32 *db;67 u32 cc; /* consumer counter */68};69 70struct mlx5_wq_ll {71 struct mlx5_frag_buf_ctrl fbc;72 __be32 *db;73 __be16 *tail_next;74 u16 head;75 u16 wqe_ctr;76 u16 cur_sz;77};78 79int 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);82void mlx5_wq_cyc_wqe_dump(struct mlx5_wq_cyc *wq, u16 ix, u8 nstrides);83void mlx5_wq_cyc_reset(struct mlx5_wq_cyc *wq);84 85int 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);88 89int 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 93int mlx5_wq_ll_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,94 void *wqc, struct mlx5_wq_ll *wq,95 struct mlx5_wq_ctrl *wq_ctrl);96void mlx5_wq_ll_reset(struct mlx5_wq_ll *wq);97 98void mlx5_wq_destroy(struct mlx5_wq_ctrl *wq_ctrl);99 100static inline u32 mlx5_wq_cyc_get_size(struct mlx5_wq_cyc *wq)101{102 return (u32)wq->fbc.sz_m1 + 1;103}104 105static inline int mlx5_wq_cyc_is_full(struct mlx5_wq_cyc *wq)106{107 return wq->cur_sz == wq->sz;108}109 110static inline int mlx5_wq_cyc_missing(struct mlx5_wq_cyc *wq)111{112 return wq->sz - wq->cur_sz;113}114 115static inline int mlx5_wq_cyc_is_empty(struct mlx5_wq_cyc *wq)116{117 return !wq->cur_sz;118}119 120static inline void mlx5_wq_cyc_push(struct mlx5_wq_cyc *wq)121{122 wq->wqe_ctr++;123 wq->cur_sz++;124}125 126static inline void mlx5_wq_cyc_push_n(struct mlx5_wq_cyc *wq, u16 n)127{128 wq->wqe_ctr += n;129 wq->cur_sz += n;130}131 132static inline void mlx5_wq_cyc_pop(struct mlx5_wq_cyc *wq)133{134 wq->cur_sz--;135}136 137static inline void mlx5_wq_cyc_update_db_record(struct mlx5_wq_cyc *wq)138{139 *wq->db = cpu_to_be32(wq->wqe_ctr);140}141 142static inline u16 mlx5_wq_cyc_ctr2ix(struct mlx5_wq_cyc *wq, u16 ctr)143{144 return ctr & wq->fbc.sz_m1;145}146 147static inline u16 mlx5_wq_cyc_get_head(struct mlx5_wq_cyc *wq)148{149 return mlx5_wq_cyc_ctr2ix(wq, wq->wqe_ctr);150}151 152static inline u16 mlx5_wq_cyc_get_tail(struct mlx5_wq_cyc *wq)153{154 return mlx5_wq_cyc_ctr2ix(wq, wq->wqe_ctr - wq->cur_sz);155}156 157static inline void *mlx5_wq_cyc_get_wqe(struct mlx5_wq_cyc *wq, u16 ix)158{159 return mlx5_frag_buf_get_wqe(&wq->fbc, ix);160}161 162static inline u16 mlx5_wq_cyc_get_contig_wqebbs(struct mlx5_wq_cyc *wq, u16 ix)163{164 return mlx5_frag_buf_get_idx_last_contig_stride(&wq->fbc, ix) - ix + 1;165}166 167static inline int mlx5_wq_cyc_cc_bigger(u16 cc1, u16 cc2)168{169 int equal = (cc1 == cc2);170 int smaller = 0x8000 & (cc1 - cc2);171 172 return !equal && !smaller;173}174 175static inline u16 mlx5_wq_cyc_get_counter(struct mlx5_wq_cyc *wq)176{177 return wq->wqe_ctr;178}179 180static inline u32 mlx5_cqwq_get_size(struct mlx5_cqwq *wq)181{182 return wq->fbc.sz_m1 + 1;183}184 185static inline u8 mlx5_cqwq_get_log_stride_size(struct mlx5_cqwq *wq)186{187 return wq->fbc.log_stride;188}189 190static inline u32 mlx5_cqwq_ctr2ix(struct mlx5_cqwq *wq, u32 ctr)191{192 return ctr & wq->fbc.sz_m1;193}194 195static inline u32 mlx5_cqwq_get_ci(struct mlx5_cqwq *wq)196{197 return mlx5_cqwq_ctr2ix(wq, wq->cc);198}199 200static inline struct mlx5_cqe64 *mlx5_cqwq_get_wqe(struct mlx5_cqwq *wq, u32 ix)201{202 struct mlx5_cqe64 *cqe = mlx5_frag_buf_get_wqe(&wq->fbc, ix);203 204 /* For 128B CQEs the data is in the last 64B */205 cqe += wq->fbc.log_stride == 7;206 207 return cqe;208}209 210static inline u32 mlx5_cqwq_get_ctr_wrap_cnt(struct mlx5_cqwq *wq, u32 ctr)211{212 return ctr >> wq->fbc.log_sz;213}214 215static inline u32 mlx5_cqwq_get_wrap_cnt(struct mlx5_cqwq *wq)216{217 return mlx5_cqwq_get_ctr_wrap_cnt(wq, wq->cc);218}219 220static inline void mlx5_cqwq_pop(struct mlx5_cqwq *wq)221{222 wq->cc++;223}224 225static inline void mlx5_cqwq_update_db_record(struct mlx5_cqwq *wq)226{227 *wq->db = cpu_to_be32(wq->cc & 0xffffff);228}229 230static inline struct mlx5_cqe64 *mlx5_cqwq_get_cqe(struct mlx5_cqwq *wq)231{232 u32 ci = mlx5_cqwq_get_ci(wq);233 struct mlx5_cqe64 *cqe = mlx5_cqwq_get_wqe(wq, ci);234 u8 cqe_ownership_bit = cqe->op_own & MLX5_CQE_OWNER_MASK;235 u8 sw_ownership_val = mlx5_cqwq_get_wrap_cnt(wq) & 1;236 237 if (cqe_ownership_bit != sw_ownership_val)238 return NULL;239 240 /* ensure cqe content is read after cqe ownership bit */241 dma_rmb();242 243 return cqe;244}245 246static inline247struct mlx5_cqe64 *mlx5_cqwq_get_cqe_enahnced_comp(struct mlx5_cqwq *wq)248{249 u8 sw_validity_iteration_count = mlx5_cqwq_get_wrap_cnt(wq) & 0xff;250 u32 ci = mlx5_cqwq_get_ci(wq);251 struct mlx5_cqe64 *cqe;252 253 cqe = mlx5_cqwq_get_wqe(wq, ci);254 if (cqe->validity_iteration_count != sw_validity_iteration_count)255 return NULL;256 257 /* ensure cqe content is read after cqe ownership bit/validity byte */258 dma_rmb();259 260 return cqe;261}262 263static inline u32 mlx5_wq_ll_get_size(struct mlx5_wq_ll *wq)264{265 return (u32)wq->fbc.sz_m1 + 1;266}267 268static inline int mlx5_wq_ll_is_full(struct mlx5_wq_ll *wq)269{270 return wq->cur_sz == wq->fbc.sz_m1;271}272 273static inline int mlx5_wq_ll_is_empty(struct mlx5_wq_ll *wq)274{275 return !wq->cur_sz;276}277 278static inline int mlx5_wq_ll_missing(struct mlx5_wq_ll *wq)279{280 return wq->fbc.sz_m1 - wq->cur_sz;281}282 283static inline void *mlx5_wq_ll_get_wqe(struct mlx5_wq_ll *wq, u16 ix)284{285 return mlx5_frag_buf_get_wqe(&wq->fbc, ix);286}287 288static inline u16 mlx5_wq_ll_get_wqe_next_ix(struct mlx5_wq_ll *wq, u16 ix)289{290 struct mlx5_wqe_srq_next_seg *wqe = mlx5_wq_ll_get_wqe(wq, ix);291 292 return be16_to_cpu(wqe->next_wqe_index);293}294 295static inline void mlx5_wq_ll_push(struct mlx5_wq_ll *wq, u16 head_next)296{297 wq->head = head_next;298 wq->wqe_ctr++;299 wq->cur_sz++;300}301 302static inline void mlx5_wq_ll_pop(struct mlx5_wq_ll *wq, __be16 ix,303 __be16 *next_tail_next)304{305 *wq->tail_next = ix;306 wq->tail_next = next_tail_next;307 wq->cur_sz--;308}309 310static inline void mlx5_wq_ll_update_db_record(struct mlx5_wq_ll *wq)311{312 *wq->db = cpu_to_be32(wq->wqe_ctr);313}314 315static inline u16 mlx5_wq_ll_get_head(struct mlx5_wq_ll *wq)316{317 return wq->head;318}319 320static inline u16 mlx5_wq_ll_get_counter(struct mlx5_wq_ll *wq)321{322 return wq->wqe_ctr;323}324 325#endif /* __MLX5_WQ_H__ */326