1 /* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */ 2 /* QLogic qed NIC Driver 3 * Copyright (c) 2015-2017 QLogic Corporation 4 * Copyright (c) 2019-2020 Marvell International Ltd. 5 */ 6 7 #ifndef _QED_LL2_IF_H 8 #define _QED_LL2_IF_H 9 10 #include <linux/types.h> 11 #include <linux/interrupt.h> 12 #include <linux/netdevice.h> 13 #include <linux/pci.h> 14 #include <linux/skbuff.h> 15 #include <linux/kernel.h> 16 #include <linux/slab.h> 17 #include <linux/qed/qed_if.h> 18 19 enum qed_ll2_conn_type { 20 QED_LL2_TYPE_FCOE, 21 QED_LL2_TYPE_TCP_ULP, 22 QED_LL2_TYPE_TEST, 23 QED_LL2_TYPE_OOO, 24 QED_LL2_TYPE_RESERVED2, 25 QED_LL2_TYPE_ROCE, 26 QED_LL2_TYPE_IWARP, 27 QED_LL2_TYPE_RESERVED3, 28 MAX_QED_LL2_CONN_TYPE 29 }; 30 31 enum qed_ll2_rx_conn_type { 32 QED_LL2_RX_TYPE_LEGACY, 33 QED_LL2_RX_TYPE_CTX, 34 MAX_QED_LL2_RX_CONN_TYPE 35 }; 36 37 enum qed_ll2_roce_flavor_type { 38 QED_LL2_ROCE, 39 QED_LL2_RROCE, 40 MAX_QED_LL2_ROCE_FLAVOR_TYPE 41 }; 42 43 enum qed_ll2_tx_dest { 44 QED_LL2_TX_DEST_NW, /* Light L2 TX Destination to the Network */ 45 QED_LL2_TX_DEST_LB, /* Light L2 TX Destination to the Loopback */ 46 QED_LL2_TX_DEST_DROP, /* Light L2 Drop the TX packet */ 47 QED_LL2_TX_DEST_MAX 48 }; 49 50 enum qed_ll2_error_handle { 51 QED_LL2_DROP_PACKET, 52 QED_LL2_DO_NOTHING, 53 QED_LL2_ASSERT, 54 }; 55 56 struct qed_ll2_stats { 57 u64 gsi_invalid_hdr; 58 u64 gsi_invalid_pkt_length; 59 u64 gsi_unsupported_pkt_typ; 60 u64 gsi_crcchksm_error; 61 62 u64 packet_too_big_discard; 63 u64 no_buff_discard; 64 65 u64 rcv_ucast_bytes; 66 u64 rcv_mcast_bytes; 67 u64 rcv_bcast_bytes; 68 u64 rcv_ucast_pkts; 69 u64 rcv_mcast_pkts; 70 u64 rcv_bcast_pkts; 71 72 u64 sent_ucast_bytes; 73 u64 sent_mcast_bytes; 74 u64 sent_bcast_bytes; 75 u64 sent_ucast_pkts; 76 u64 sent_mcast_pkts; 77 u64 sent_bcast_pkts; 78 }; 79 80 struct qed_ll2_comp_rx_data { 81 void *cookie; 82 dma_addr_t rx_buf_addr; 83 u16 parse_flags; 84 u16 err_flags; 85 u16 vlan; 86 bool b_last_packet; 87 u8 connection_handle; 88 89 union { 90 u16 packet_length; 91 u16 data_length; 92 } length; 93 94 u32 opaque_data_0; 95 u32 opaque_data_1; 96 97 /* GSI only */ 98 u32 src_qp; 99 u16 qp_id; 100 101 union { 102 u8 placement_offset; 103 u8 data_length_error; 104 } u; 105 }; 106 107 typedef 108 void (*qed_ll2_complete_rx_packet_cb)(void *cxt, 109 struct qed_ll2_comp_rx_data *data); 110 111 typedef 112 void (*qed_ll2_release_rx_packet_cb)(void *cxt, 113 u8 connection_handle, 114 void *cookie, 115 dma_addr_t rx_buf_addr, 116 bool b_last_packet); 117 118 typedef 119 void (*qed_ll2_complete_tx_packet_cb)(void *cxt, 120 u8 connection_handle, 121 void *cookie, 122 dma_addr_t first_frag_addr, 123 bool b_last_fragment, 124 bool b_last_packet); 125 126 typedef 127 void (*qed_ll2_release_tx_packet_cb)(void *cxt, 128 u8 connection_handle, 129 void *cookie, 130 dma_addr_t first_frag_addr, 131 bool b_last_fragment, bool b_last_packet); 132 133 typedef 134 void (*qed_ll2_slowpath_cb)(void *cxt, u8 connection_handle, 135 u32 opaque_data_0, u32 opaque_data_1); 136 137 struct qed_ll2_cbs { 138 qed_ll2_complete_rx_packet_cb rx_comp_cb; 139 qed_ll2_release_rx_packet_cb rx_release_cb; 140 qed_ll2_complete_tx_packet_cb tx_comp_cb; 141 qed_ll2_release_tx_packet_cb tx_release_cb; 142 qed_ll2_slowpath_cb slowpath_cb; 143 void *cookie; 144 }; 145 146 struct qed_ll2_acquire_data_inputs { 147 enum qed_ll2_rx_conn_type rx_conn_type; 148 enum qed_ll2_conn_type conn_type; 149 u16 mtu; 150 u16 rx_num_desc; 151 u16 rx_num_ooo_buffers; 152 u8 rx_drop_ttl0_flg; 153 u8 rx_vlan_removal_en; 154 u16 tx_num_desc; 155 u8 tx_max_bds_per_packet; 156 u8 tx_tc; 157 enum qed_ll2_tx_dest tx_dest; 158 enum qed_ll2_error_handle ai_err_packet_too_big; 159 enum qed_ll2_error_handle ai_err_no_buf; 160 bool secondary_queue; 161 u8 gsi_enable; 162 }; 163 164 struct qed_ll2_acquire_data { 165 struct qed_ll2_acquire_data_inputs input; 166 const struct qed_ll2_cbs *cbs; 167 168 /* Output container for LL2 connection's handle */ 169 u8 *p_connection_handle; 170 }; 171 172 struct qed_ll2_tx_pkt_info { 173 void *cookie; 174 dma_addr_t first_frag; 175 enum qed_ll2_tx_dest tx_dest; 176 enum qed_ll2_roce_flavor_type qed_roce_flavor; 177 u16 vlan; 178 u16 l4_hdr_offset_w; /* from start of packet */ 179 u16 first_frag_len; 180 u8 num_of_bds; 181 u8 bd_flags; 182 bool enable_ip_cksum; 183 bool enable_l4_cksum; 184 bool calc_ip_len; 185 bool remove_stag; 186 }; 187 188 #define QED_LL2_UNUSED_HANDLE (0xff) 189 190 struct qed_ll2_cb_ops { 191 int (*rx_cb)(void *, struct sk_buff *, u32, u32); 192 int (*tx_cb)(void *, struct sk_buff *, bool); 193 }; 194 195 struct qed_ll2_params { 196 u16 mtu; 197 bool drop_ttl0_packets; 198 bool rx_vlan_stripping; 199 u8 tx_tc; 200 bool frags_mapped; 201 u8 ll2_mac_address[ETH_ALEN]; 202 }; 203 204 enum qed_ll2_xmit_flags { 205 /* FIP discovery packet */ 206 QED_LL2_XMIT_FLAGS_FIP_DISCOVERY 207 }; 208 209 struct qed_ll2_ops { 210 /** 211 * start(): Initializes ll2. 212 * 213 * @cdev: Qed dev pointer. 214 * @params: Protocol driver configuration for the ll2. 215 * 216 * Return: 0 on success, otherwise error value. 217 */ 218 int (*start)(struct qed_dev *cdev, struct qed_ll2_params *params); 219 220 /** 221 * stop(): Stops the ll2 222 * 223 * @cdev: Qed dev pointer. 224 * 225 * Return: 0 on success, otherwise error value. 226 */ 227 int (*stop)(struct qed_dev *cdev); 228 229 /** 230 * start_xmit(): Transmits an skb over the ll2 interface 231 * 232 * @cdev: Qed dev pointer. 233 * @skb: SKB. 234 * @xmit_flags: Transmit options defined by the enum qed_ll2_xmit_flags. 235 * 236 * Return: 0 on success, otherwise error value. 237 */ 238 int (*start_xmit)(struct qed_dev *cdev, struct sk_buff *skb, 239 unsigned long xmit_flags); 240 241 /** 242 * register_cb_ops(): Protocol driver register the callback for Rx/Tx 243 * packets. Should be called before `start'. 244 * 245 * @cdev: Qed dev pointer. 246 * @cookie: to be passed to the callback functions. 247 * @ops: the callback functions to register for Rx / Tx. 248 * 249 * Return: 0 on success, otherwise error value. 250 */ 251 void (*register_cb_ops)(struct qed_dev *cdev, 252 const struct qed_ll2_cb_ops *ops, 253 void *cookie); 254 255 /** 256 * get_stats(): Get LL2 related statistics. 257 * 258 * @cdev: Qed dev pointer. 259 * @stats: Pointer to struct that would be filled with stats. 260 * 261 * Return: 0 on success, error otherwise. 262 */ 263 int (*get_stats)(struct qed_dev *cdev, struct qed_ll2_stats *stats); 264 }; 265 266 #ifdef CONFIG_QED_LL2 267 int qed_ll2_alloc_if(struct qed_dev *); 268 void qed_ll2_dealloc_if(struct qed_dev *); 269 #else 270 static const struct qed_ll2_ops qed_ll2_ops_pass = { 271 .start = NULL, 272 .stop = NULL, 273 .start_xmit = NULL, 274 .register_cb_ops = NULL, 275 .get_stats = NULL, 276 }; 277 278 static inline int qed_ll2_alloc_if(struct qed_dev *cdev) 279 { 280 return 0; 281 } 282 283 static inline void qed_ll2_dealloc_if(struct qed_dev *cdev) 284 { 285 } 286 #endif 287 #endif 288