1 /* Broadcom NetXtreme-C/E network driver. 2 * 3 * Copyright (c) 2020 Broadcom Limited 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation. 8 */ 9 10 #ifndef BNXT_HWRM_H 11 #define BNXT_HWRM_H 12 13 #include "bnxt_hsi.h" 14 15 enum bnxt_hwrm_ctx_flags { 16 /* Update the HWRM_API_FLAGS right below for any new non-internal bit added here */ 17 BNXT_HWRM_INTERNAL_CTX_OWNED = BIT(0), /* caller owns the context */ 18 BNXT_HWRM_INTERNAL_RESP_DIRTY = BIT(1), /* response contains data */ 19 BNXT_HWRM_CTX_SILENT = BIT(2), /* squelch firmware errors */ 20 BNXT_HWRM_FULL_WAIT = BIT(3), /* wait for full timeout of HWRM command */ 21 }; 22 23 #define HWRM_API_FLAGS (BNXT_HWRM_CTX_SILENT | BNXT_HWRM_FULL_WAIT) 24 25 struct bnxt_hwrm_ctx { 26 u64 sentinel; 27 dma_addr_t dma_handle; 28 struct output *resp; 29 struct input *req; 30 dma_addr_t slice_handle; 31 void *slice_addr; 32 u32 slice_size; 33 u32 req_len; 34 enum bnxt_hwrm_ctx_flags flags; 35 unsigned int timeout; 36 u32 allocated; 37 gfp_t gfp; 38 }; 39 40 enum bnxt_hwrm_wait_state { 41 BNXT_HWRM_PENDING, 42 BNXT_HWRM_DEFERRED, 43 BNXT_HWRM_COMPLETE, 44 BNXT_HWRM_CANCELLED, 45 }; 46 47 enum bnxt_hwrm_chnl { BNXT_HWRM_CHNL_CHIMP, BNXT_HWRM_CHNL_KONG }; 48 49 struct bnxt_hwrm_wait_token { 50 struct rcu_head rcu; 51 struct hlist_node node; 52 enum bnxt_hwrm_wait_state state; 53 enum bnxt_hwrm_chnl dst; 54 u16 seq_id; 55 }; 56 57 void hwrm_update_token(struct bnxt *bp, u16 seq, enum bnxt_hwrm_wait_state s); 58 59 #define BNXT_HWRM_MAX_REQ_LEN (bp->hwrm_max_req_len) 60 #define BNXT_HWRM_SHORT_REQ_LEN sizeof(struct hwrm_short_input) 61 #define HWRM_CMD_MAX_TIMEOUT 40000U 62 #define SHORT_HWRM_CMD_TIMEOUT 20 63 #define HWRM_CMD_TIMEOUT (bp->hwrm_cmd_timeout) 64 #define HWRM_RESET_TIMEOUT ((HWRM_CMD_TIMEOUT) * 4) 65 #define BNXT_HWRM_TARGET 0xffff 66 #define BNXT_HWRM_NO_CMPL_RING -1 67 #define BNXT_HWRM_REQ_MAX_SIZE 128 68 #define BNXT_HWRM_DMA_SIZE (2 * PAGE_SIZE) /* space for req+resp */ 69 #define BNXT_HWRM_RESP_RESERVED PAGE_SIZE 70 #define BNXT_HWRM_RESP_OFFSET (BNXT_HWRM_DMA_SIZE - \ 71 BNXT_HWRM_RESP_RESERVED) 72 #define BNXT_HWRM_CTX_OFFSET (BNXT_HWRM_RESP_OFFSET - \ 73 sizeof(struct bnxt_hwrm_ctx)) 74 #define BNXT_HWRM_DMA_ALIGN 16 75 #define BNXT_HWRM_SENTINEL 0xb6e1f68a12e9a7eb /* arbitrary value */ 76 #define BNXT_HWRM_REQS_PER_PAGE (BNXT_PAGE_SIZE / \ 77 BNXT_HWRM_REQ_MAX_SIZE) 78 #define HWRM_SHORT_MIN_TIMEOUT 3 79 #define HWRM_SHORT_MAX_TIMEOUT 10 80 #define HWRM_SHORT_TIMEOUT_COUNTER 5 81 82 #define HWRM_MIN_TIMEOUT 25 83 #define HWRM_MAX_TIMEOUT 40 84 85 static inline unsigned int hwrm_total_timeout(unsigned int n) 86 { 87 return n <= HWRM_SHORT_TIMEOUT_COUNTER ? n * HWRM_SHORT_MIN_TIMEOUT : 88 HWRM_SHORT_TIMEOUT_COUNTER * HWRM_SHORT_MIN_TIMEOUT + 89 (n - HWRM_SHORT_TIMEOUT_COUNTER) * HWRM_MIN_TIMEOUT; 90 } 91 92 93 #define HWRM_VALID_BIT_DELAY_USEC 50000 94 95 static inline bool bnxt_cfa_hwrm_message(u16 req_type) 96 { 97 switch (req_type) { 98 case HWRM_CFA_ENCAP_RECORD_ALLOC: 99 case HWRM_CFA_ENCAP_RECORD_FREE: 100 case HWRM_CFA_DECAP_FILTER_ALLOC: 101 case HWRM_CFA_DECAP_FILTER_FREE: 102 case HWRM_CFA_EM_FLOW_ALLOC: 103 case HWRM_CFA_EM_FLOW_FREE: 104 case HWRM_CFA_EM_FLOW_CFG: 105 case HWRM_CFA_FLOW_ALLOC: 106 case HWRM_CFA_FLOW_FREE: 107 case HWRM_CFA_FLOW_INFO: 108 case HWRM_CFA_FLOW_FLUSH: 109 case HWRM_CFA_FLOW_STATS: 110 case HWRM_CFA_METER_PROFILE_ALLOC: 111 case HWRM_CFA_METER_PROFILE_FREE: 112 case HWRM_CFA_METER_PROFILE_CFG: 113 case HWRM_CFA_METER_INSTANCE_ALLOC: 114 case HWRM_CFA_METER_INSTANCE_FREE: 115 return true; 116 default: 117 return false; 118 } 119 } 120 121 static inline bool bnxt_kong_hwrm_message(struct bnxt *bp, struct input *req) 122 { 123 return (bp->fw_cap & BNXT_FW_CAP_KONG_MB_CHNL && 124 (bnxt_cfa_hwrm_message(le16_to_cpu(req->req_type)) || 125 le16_to_cpu(req->target_id) == HWRM_TARGET_ID_KONG)); 126 } 127 128 int __hwrm_req_init(struct bnxt *bp, void **req, u16 req_type, u32 req_len); 129 #define hwrm_req_init(bp, req, req_type) \ 130 __hwrm_req_init((bp), (void **)&(req), (req_type), sizeof(*(req))) 131 void *hwrm_req_hold(struct bnxt *bp, void *req); 132 void hwrm_req_drop(struct bnxt *bp, void *req); 133 void hwrm_req_flags(struct bnxt *bp, void *req, enum bnxt_hwrm_ctx_flags flags); 134 void hwrm_req_timeout(struct bnxt *bp, void *req, unsigned int timeout); 135 int hwrm_req_send(struct bnxt *bp, void *req); 136 int hwrm_req_send_silent(struct bnxt *bp, void *req); 137 int hwrm_req_replace(struct bnxt *bp, void *req, void *new_req, u32 len); 138 void hwrm_req_alloc_flags(struct bnxt *bp, void *req, gfp_t flags); 139 void *hwrm_req_dma_slice(struct bnxt *bp, void *req, u32 size, dma_addr_t *dma); 140 #endif 141