1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2014-2018 Broadcom
3 * All rights reserved.
4 */
5
6 #ifndef _BNXT_RING_H_
7 #define _BNXT_RING_H_
8
9 #include <inttypes.h>
10
11 #include <rte_memory.h>
12
13 #define RING_ADV(ring, idx, n) (((idx) + (n)) & (ring)->ring_mask)
14 #define RING_NEXT(ring, idx) RING_ADV(ring, idx, 1)
15
16 #define DB_IDX_MASK 0xffffff
17 #define DB_IDX_VALID (0x1 << 26)
18 #define DB_IRQ_DIS (0x1 << 27)
19 #define DB_KEY_TX (0x0 << 28)
20 #define DB_KEY_RX (0x1 << 28)
21 #define DB_KEY_CP (0x2 << 28)
22 #define DB_KEY_ST (0x3 << 28)
23 #define DB_KEY_TX_PUSH (0x4 << 28)
24 #define DB_LONG_TX_PUSH (0x2 << 24)
25
26 #define DEFAULT_CP_RING_SIZE 256
27 #define DEFAULT_RX_RING_SIZE 256
28 #define DEFAULT_TX_RING_SIZE 256
29
30 #define AGG_RING_SIZE_FACTOR 4
31 #define AGG_RING_MULTIPLIER 2
32
33 /* These assume 4k pages */
34 #define MAX_RX_DESC_CNT (8 * 1024)
35 #define MAX_TX_DESC_CNT (4 * 1024)
36 #define MAX_CP_DESC_CNT (16 * 1024)
37
38 #define INVALID_HW_RING_ID ((uint16_t)-1)
39 #define INVALID_STATS_CTX_ID ((uint16_t)-1)
40
41 struct bnxt_ring {
42 void *bd;
43 rte_iova_t bd_dma;
44 uint32_t ring_size;
45 uint32_t ring_mask;
46
47 int vmem_size;
48 void **vmem;
49
50 uint16_t fw_ring_id; /* Ring id filled by Chimp FW */
51 uint16_t fw_rx_ring_id;
52 const void *mem_zone;
53 };
54
55 struct bnxt_ring_grp_info {
56 uint16_t fw_stats_ctx;
57 uint16_t fw_grp_id;
58 uint16_t rx_fw_ring_id;
59 uint16_t cp_fw_ring_id;
60 uint16_t ag_fw_ring_id;
61 };
62
63 struct bnxt;
64 struct bnxt_tx_ring_info;
65 struct bnxt_rx_ring_info;
66 struct bnxt_cp_ring_info;
67 void bnxt_free_ring(struct bnxt_ring *ring);
68 int bnxt_alloc_ring_grps(struct bnxt *bp);
69 int bnxt_alloc_rings(struct bnxt *bp, uint16_t qidx,
70 struct bnxt_tx_queue *txq,
71 struct bnxt_rx_queue *rxq,
72 struct bnxt_cp_ring_info *cp_ring_info,
73 struct bnxt_cp_ring_info *nq_ring_info,
74 const char *suffix);
75 int bnxt_alloc_hwrm_rx_ring(struct bnxt *bp, int queue_index);
76 int bnxt_alloc_hwrm_rings(struct bnxt *bp);
77 int bnxt_alloc_async_cp_ring(struct bnxt *bp);
78 void bnxt_free_async_cp_ring(struct bnxt *bp);
79 int bnxt_alloc_async_ring_struct(struct bnxt *bp);
80 int bnxt_alloc_rxtx_nq_ring(struct bnxt *bp);
81 void bnxt_free_rxtx_nq_ring(struct bnxt *bp);
82
bnxt_db_write(struct bnxt_db_info * db,uint32_t idx)83 static inline void bnxt_db_write(struct bnxt_db_info *db, uint32_t idx)
84 {
85 if (db->db_64)
86 rte_write64(db->db_key64 | idx, db->doorbell);
87 else
88 rte_write32(db->db_key32 | idx, db->doorbell);
89 }
90
91 /* Ring an NQ doorbell and disable interrupts for the ring. */
bnxt_db_nq(struct bnxt_cp_ring_info * cpr)92 static inline void bnxt_db_nq(struct bnxt_cp_ring_info *cpr)
93 {
94 if (unlikely(!cpr->cp_db.db_64))
95 return;
96
97 rte_write64(cpr->cp_db.db_key64 | DBR_TYPE_NQ |
98 RING_CMP(cpr->cp_ring_struct, cpr->cp_raw_cons),
99 cpr->cp_db.doorbell);
100 }
101
102 /* Ring an NQ doorbell and enable interrupts for the ring. */
bnxt_db_nq_arm(struct bnxt_cp_ring_info * cpr)103 static inline void bnxt_db_nq_arm(struct bnxt_cp_ring_info *cpr)
104 {
105 if (unlikely(!cpr->cp_db.db_64))
106 return;
107
108 rte_write64(cpr->cp_db.db_key64 | DBR_TYPE_NQ_ARM |
109 RING_CMP(cpr->cp_ring_struct, cpr->cp_raw_cons),
110 cpr->cp_db.doorbell);
111 }
112
bnxt_db_cq(struct bnxt_cp_ring_info * cpr)113 static inline void bnxt_db_cq(struct bnxt_cp_ring_info *cpr)
114 {
115 struct bnxt_db_info *db = &cpr->cp_db;
116 uint32_t idx = RING_CMP(cpr->cp_ring_struct, cpr->cp_raw_cons);
117
118 if (db->db_64) {
119 uint64_t key_idx = db->db_key64 | idx;
120 void *doorbell = db->doorbell;
121
122 rte_compiler_barrier();
123 rte_write64_relaxed(key_idx, doorbell);
124 } else {
125 uint32_t cp_raw_cons = cpr->cp_raw_cons;
126
127 rte_compiler_barrier();
128 B_CP_DIS_DB(cpr, cp_raw_cons);
129 }
130 }
131
132 #endif
133