1 /*
2  * Huawei HiNIC PCI Express Linux driver
3  * Copyright(c) 2017 Huawei Technologies Co., Ltd
4  *
5  * This program is free software; you can redistribute it and/or modify it
6  * under the terms and conditions of the GNU General Public License,
7  * version 2, as published by the Free Software Foundation.
8  *
9  * This program is distributed in the hope it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * for more details.
13  *
14  */
15 
16 #ifndef HINIC_HW_QP_H
17 #define HINIC_HW_QP_H
18 
19 #include <linux/kernel.h>
20 #include <linux/types.h>
21 #include <linux/sizes.h>
22 #include <linux/pci.h>
23 #include <linux/skbuff.h>
24 
25 #include "hinic_common.h"
26 #include "hinic_hw_if.h"
27 #include "hinic_hw_wqe.h"
28 #include "hinic_hw_wq.h"
29 #include "hinic_hw_qp_ctxt.h"
30 
31 #define HINIC_SQ_DB_INFO_PI_HI_SHIFT            0
32 #define HINIC_SQ_DB_INFO_QID_SHIFT              8
33 #define HINIC_SQ_DB_INFO_PATH_SHIFT             23
34 #define HINIC_SQ_DB_INFO_COS_SHIFT              24
35 #define HINIC_SQ_DB_INFO_TYPE_SHIFT             27
36 
37 #define HINIC_SQ_DB_INFO_PI_HI_MASK             0xFF
38 #define HINIC_SQ_DB_INFO_QID_MASK               0x3FF
39 #define HINIC_SQ_DB_INFO_PATH_MASK              0x1
40 #define HINIC_SQ_DB_INFO_COS_MASK               0x7
41 #define HINIC_SQ_DB_INFO_TYPE_MASK              0x1F
42 
43 #define HINIC_SQ_DB_INFO_SET(val, member)       \
44 		(((u32)(val) & HINIC_SQ_DB_INFO_##member##_MASK) \
45 		 << HINIC_SQ_DB_INFO_##member##_SHIFT)
46 
47 #define HINIC_SQ_WQEBB_SIZE                     64
48 #define HINIC_RQ_WQEBB_SIZE                     32
49 
50 #define HINIC_SQ_PAGE_SIZE                      SZ_4K
51 #define HINIC_RQ_PAGE_SIZE                      SZ_4K
52 
53 #define HINIC_SQ_DEPTH                          SZ_4K
54 #define HINIC_RQ_DEPTH                          SZ_4K
55 
56 /* In any change to HINIC_RX_BUF_SZ, HINIC_RX_BUF_SZ_IDX must be changed */
57 #define HINIC_RX_BUF_SZ                         2048
58 #define HINIC_RX_BUF_SZ_IDX			HINIC_RX_BUF_SZ_2048_IDX
59 
60 #define HINIC_MIN_TX_WQE_SIZE(wq)               \
61 		ALIGN(HINIC_SQ_WQE_SIZE(1), (wq)->wqebb_size)
62 
63 #define HINIC_MIN_TX_NUM_WQEBBS(sq)             \
64 		(HINIC_MIN_TX_WQE_SIZE((sq)->wq) / (sq)->wq->wqebb_size)
65 
66 enum hinic_rx_buf_sz_idx {
67 	HINIC_RX_BUF_SZ_32_IDX,
68 	HINIC_RX_BUF_SZ_64_IDX,
69 	HINIC_RX_BUF_SZ_96_IDX,
70 	HINIC_RX_BUF_SZ_128_IDX,
71 	HINIC_RX_BUF_SZ_192_IDX,
72 	HINIC_RX_BUF_SZ_256_IDX,
73 	HINIC_RX_BUF_SZ_384_IDX,
74 	HINIC_RX_BUF_SZ_512_IDX,
75 	HINIC_RX_BUF_SZ_768_IDX,
76 	HINIC_RX_BUF_SZ_1024_IDX,
77 	HINIC_RX_BUF_SZ_1536_IDX,
78 	HINIC_RX_BUF_SZ_2048_IDX,
79 	HINIC_RX_BUF_SZ_3072_IDX,
80 	HINIC_RX_BUF_SZ_4096_IDX,
81 	HINIC_RX_BUF_SZ_8192_IDX,
82 	HINIC_RX_BUF_SZ_16384_IDX,
83 };
84 
85 struct hinic_sq {
86 	struct hinic_hwif       *hwif;
87 
88 	struct hinic_wq         *wq;
89 
90 	u32                     irq;
91 	u16                     msix_entry;
92 
93 	void                    *hw_ci_addr;
94 	dma_addr_t              hw_ci_dma_addr;
95 
96 	void __iomem            *db_base;
97 
98 	struct sk_buff          **saved_skb;
99 };
100 
101 struct hinic_rq {
102 	struct hinic_hwif       *hwif;
103 
104 	struct hinic_wq         *wq;
105 
106 	u32                     irq;
107 	u16                     msix_entry;
108 
109 	size_t                  buf_sz;
110 
111 	struct sk_buff          **saved_skb;
112 
113 	struct hinic_rq_cqe     **cqe;
114 	dma_addr_t              *cqe_dma;
115 
116 	u16                     *pi_virt_addr;
117 	dma_addr_t              pi_dma_addr;
118 };
119 
120 struct hinic_qp {
121 	struct hinic_sq         sq;
122 	struct hinic_rq         rq;
123 
124 	u16     q_id;
125 };
126 
127 void hinic_qp_prepare_header(struct hinic_qp_ctxt_header *qp_ctxt_hdr,
128 			     enum hinic_qp_ctxt_type ctxt_type,
129 			     u16 num_queues, u16 max_queues);
130 
131 void hinic_sq_prepare_ctxt(struct hinic_sq_ctxt *sq_ctxt,
132 			   struct hinic_sq *sq, u16 global_qid);
133 
134 void hinic_rq_prepare_ctxt(struct hinic_rq_ctxt *rq_ctxt,
135 			   struct hinic_rq *rq, u16 global_qid);
136 
137 int hinic_init_sq(struct hinic_sq *sq, struct hinic_hwif *hwif,
138 		  struct hinic_wq *wq, struct msix_entry *entry, void *ci_addr,
139 		  dma_addr_t ci_dma_addr, void __iomem *db_base);
140 
141 void hinic_clean_sq(struct hinic_sq *sq);
142 
143 int hinic_init_rq(struct hinic_rq *rq, struct hinic_hwif *hwif,
144 		  struct hinic_wq *wq, struct msix_entry *entry);
145 
146 void hinic_clean_rq(struct hinic_rq *rq);
147 
148 int hinic_get_sq_free_wqebbs(struct hinic_sq *sq);
149 
150 int hinic_get_rq_free_wqebbs(struct hinic_rq *rq);
151 
152 void hinic_sq_prepare_wqe(struct hinic_sq *sq, u16 prod_idx,
153 			  struct hinic_sq_wqe *wqe, struct hinic_sge *sges,
154 			  int nr_sges);
155 
156 void hinic_sq_write_db(struct hinic_sq *sq, u16 prod_idx, unsigned int wqe_size,
157 		       unsigned int cos);
158 
159 struct hinic_sq_wqe *hinic_sq_get_wqe(struct hinic_sq *sq,
160 				      unsigned int wqe_size, u16 *prod_idx);
161 
162 void hinic_sq_write_wqe(struct hinic_sq *sq, u16 prod_idx,
163 			struct hinic_sq_wqe *wqe, struct sk_buff *skb,
164 			unsigned int wqe_size);
165 
166 struct hinic_sq_wqe *hinic_sq_read_wqe(struct hinic_sq *sq,
167 				       struct sk_buff **skb,
168 				       unsigned int *wqe_size, u16 *cons_idx);
169 
170 void hinic_sq_put_wqe(struct hinic_sq *sq, unsigned int wqe_size);
171 
172 void hinic_sq_get_sges(struct hinic_sq_wqe *wqe, struct hinic_sge *sges,
173 		       int nr_sges);
174 
175 struct hinic_rq_wqe *hinic_rq_get_wqe(struct hinic_rq *rq,
176 				      unsigned int wqe_size, u16 *prod_idx);
177 
178 void hinic_rq_write_wqe(struct hinic_rq *rq, u16 prod_idx,
179 			struct hinic_rq_wqe *wqe, struct sk_buff *skb);
180 
181 struct hinic_rq_wqe *hinic_rq_read_wqe(struct hinic_rq *rq,
182 				       unsigned int wqe_size,
183 				       struct sk_buff **skb, u16 *cons_idx);
184 
185 struct hinic_rq_wqe *hinic_rq_read_next_wqe(struct hinic_rq *rq,
186 					    unsigned int wqe_size,
187 					    struct sk_buff **skb,
188 					    u16 *cons_idx);
189 
190 void hinic_rq_put_wqe(struct hinic_rq *rq, u16 cons_idx,
191 		      unsigned int wqe_size);
192 
193 void hinic_rq_get_sge(struct hinic_rq *rq, struct hinic_rq_wqe *wqe,
194 		      u16 cons_idx, struct hinic_sge *sge);
195 
196 void hinic_rq_prepare_wqe(struct hinic_rq *rq, u16 prod_idx,
197 			  struct hinic_rq_wqe *wqe, struct hinic_sge *sge);
198 
199 void hinic_rq_update(struct hinic_rq *rq, u16 prod_idx);
200 
201 #endif
202