drivers/net/bnxt/bnxt_ring.h

   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    2
  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
  83 static inline void bnxt_db_write(struct bnxt_db_info *db, uint32_t idx)
  84 {
  85         rte_cio_wmb();
  86
  87         if (db->db_64)
  88                 rte_write64_relaxed(db->db_key64 | idx, db->doorbell);
  89         else
  90                 rte_write32_relaxed(db->db_key32 | idx, db->doorbell);
  91 }
  92
  93 /* Ring an NQ doorbell and disable interrupts for the ring. */
  94 static inline void bnxt_db_nq(struct bnxt_cp_ring_info *cpr)
  95 {
  96         if (unlikely(!cpr->cp_db.db_64))
  97                 return;
  98
  99         rte_cio_wmb();
 100         rte_write64_relaxed(cpr->cp_db.db_key64 | DBR_TYPE_NQ |
 101                             RING_CMP(cpr->cp_ring_struct, cpr->cp_raw_cons),
 102                             cpr->cp_db.doorbell);
 103 }
 104
 105 /* Ring an NQ doorbell and enable interrupts for the ring. */
 106 static inline void bnxt_db_nq_arm(struct bnxt_cp_ring_info *cpr)
 107 {
 108         if (unlikely(!cpr->cp_db.db_64))
 109                 return;
 110
 111         rte_cio_wmb();
 112         rte_write64_relaxed(cpr->cp_db.db_key64 | DBR_TYPE_NQ_ARM |
 113                             RING_CMP(cpr->cp_ring_struct, cpr->cp_raw_cons),
 114                             cpr->cp_db.doorbell);
 115 }
 116
 117 static inline void bnxt_db_cq(struct bnxt_cp_ring_info *cpr)
 118 {
 119         struct bnxt_db_info *db = &cpr->cp_db;
 120         uint32_t idx = RING_CMP(cpr->cp_ring_struct, cpr->cp_raw_cons);
 121
 122         rte_compiler_barrier();
 123         if (db->db_64)
 124                 rte_write64_relaxed(db->db_key64 | idx, db->doorbell);
 125         else
 126                 B_CP_DIS_DB(cpr, cpr->cp_raw_cons);
 127 }
 128
 129 #endif