1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (c) 2016 Chelsio Communications, Inc. 4 */ 5 6 #ifndef __CXGBIT_H__ 7 #define __CXGBIT_H__ 8 9 #include <linux/mutex.h> 10 #include <linux/list.h> 11 #include <linux/spinlock.h> 12 #include <linux/idr.h> 13 #include <linux/completion.h> 14 #include <linux/netdevice.h> 15 #include <linux/sched.h> 16 #include <linux/pci.h> 17 #include <linux/dma-mapping.h> 18 #include <linux/inet.h> 19 #include <linux/wait.h> 20 #include <linux/kref.h> 21 #include <linux/timer.h> 22 #include <linux/io.h> 23 24 #include <asm/byteorder.h> 25 26 #include <net/net_namespace.h> 27 28 #include <target/iscsi/iscsi_transport.h> 29 #include <iscsi_target_parameters.h> 30 #include <iscsi_target_login.h> 31 32 #include "t4_regs.h" 33 #include "t4_msg.h" 34 #include "cxgb4.h" 35 #include "cxgb4_uld.h" 36 #include "l2t.h" 37 #include "libcxgb_ppm.h" 38 #include "cxgbit_lro.h" 39 40 extern struct mutex cdev_list_lock; 41 extern struct list_head cdev_list_head; 42 struct cxgbit_np; 43 44 struct cxgbit_sock; 45 46 struct cxgbit_cmd { 47 struct scatterlist sg; 48 struct cxgbi_task_tag_info ttinfo; 49 bool setup_ddp; 50 bool release; 51 }; 52 53 #define CXGBIT_MAX_ISO_PAYLOAD \ 54 min_t(u32, MAX_SKB_FRAGS * PAGE_SIZE, 65535) 55 56 struct cxgbit_iso_info { 57 u8 flags; 58 u32 mpdu; 59 u32 len; 60 u32 burst_len; 61 }; 62 63 enum cxgbit_skcb_flags { 64 SKCBF_TX_NEED_HDR = (1 << 0), /* packet needs a header */ 65 SKCBF_TX_FLAG_COMPL = (1 << 1), /* wr completion flag */ 66 SKCBF_TX_ISO = (1 << 2), /* iso cpl in tx skb */ 67 SKCBF_RX_LRO = (1 << 3), /* lro skb */ 68 }; 69 70 struct cxgbit_skb_rx_cb { 71 u8 opcode; 72 void *pdu_cb; 73 void (*backlog_fn)(struct cxgbit_sock *, struct sk_buff *); 74 }; 75 76 struct cxgbit_skb_tx_cb { 77 u8 submode; 78 u32 extra_len; 79 }; 80 81 union cxgbit_skb_cb { 82 struct { 83 u8 flags; 84 union { 85 struct cxgbit_skb_tx_cb tx; 86 struct cxgbit_skb_rx_cb rx; 87 }; 88 }; 89 90 struct { 91 /* This member must be first. */ 92 struct l2t_skb_cb l2t; 93 struct sk_buff *wr_next; 94 }; 95 }; 96 97 #define CXGBIT_SKB_CB(skb) ((union cxgbit_skb_cb *)&((skb)->cb[0])) 98 #define cxgbit_skcb_flags(skb) (CXGBIT_SKB_CB(skb)->flags) 99 #define cxgbit_skcb_submode(skb) (CXGBIT_SKB_CB(skb)->tx.submode) 100 #define cxgbit_skcb_tx_wr_next(skb) (CXGBIT_SKB_CB(skb)->wr_next) 101 #define cxgbit_skcb_tx_extralen(skb) (CXGBIT_SKB_CB(skb)->tx.extra_len) 102 #define cxgbit_skcb_rx_opcode(skb) (CXGBIT_SKB_CB(skb)->rx.opcode) 103 #define cxgbit_skcb_rx_backlog_fn(skb) (CXGBIT_SKB_CB(skb)->rx.backlog_fn) 104 #define cxgbit_rx_pdu_cb(skb) (CXGBIT_SKB_CB(skb)->rx.pdu_cb) 105 106 static inline void *cplhdr(struct sk_buff *skb) 107 { 108 return skb->data; 109 } 110 111 enum cxgbit_cdev_flags { 112 CDEV_STATE_UP = 0, 113 CDEV_ISO_ENABLE, 114 CDEV_DDP_ENABLE, 115 }; 116 117 #define NP_INFO_HASH_SIZE 32 118 119 struct np_info { 120 struct np_info *next; 121 struct cxgbit_np *cnp; 122 unsigned int stid; 123 }; 124 125 struct cxgbit_list_head { 126 struct list_head list; 127 /* device lock */ 128 spinlock_t lock; 129 }; 130 131 struct cxgbit_device { 132 struct list_head list; 133 struct cxgb4_lld_info lldi; 134 struct np_info *np_hash_tab[NP_INFO_HASH_SIZE]; 135 /* np lock */ 136 spinlock_t np_lock; 137 u8 selectq[MAX_NPORTS][2]; 138 struct cxgbit_list_head cskq; 139 u32 mdsl; 140 struct kref kref; 141 unsigned long flags; 142 }; 143 144 struct cxgbit_wr_wait { 145 struct completion completion; 146 int ret; 147 }; 148 149 enum cxgbit_csk_state { 150 CSK_STATE_IDLE = 0, 151 CSK_STATE_LISTEN, 152 CSK_STATE_CONNECTING, 153 CSK_STATE_ESTABLISHED, 154 CSK_STATE_ABORTING, 155 CSK_STATE_CLOSING, 156 CSK_STATE_MORIBUND, 157 CSK_STATE_DEAD, 158 }; 159 160 enum cxgbit_csk_flags { 161 CSK_TX_DATA_SENT = 0, 162 CSK_LOGIN_PDU_DONE, 163 CSK_LOGIN_DONE, 164 CSK_DDP_ENABLE, 165 CSK_ABORT_RPL_WAIT, 166 }; 167 168 struct cxgbit_sock_common { 169 struct cxgbit_device *cdev; 170 struct sockaddr_storage local_addr; 171 struct sockaddr_storage remote_addr; 172 struct cxgbit_wr_wait wr_wait; 173 enum cxgbit_csk_state state; 174 unsigned long flags; 175 }; 176 177 struct cxgbit_np { 178 struct cxgbit_sock_common com; 179 wait_queue_head_t accept_wait; 180 struct iscsi_np *np; 181 struct completion accept_comp; 182 struct list_head np_accept_list; 183 /* np accept lock */ 184 spinlock_t np_accept_lock; 185 struct kref kref; 186 unsigned int stid; 187 }; 188 189 struct cxgbit_sock { 190 struct cxgbit_sock_common com; 191 struct cxgbit_np *cnp; 192 struct iscsit_conn *conn; 193 struct l2t_entry *l2t; 194 struct dst_entry *dst; 195 struct list_head list; 196 struct sk_buff_head rxq; 197 struct sk_buff_head txq; 198 struct sk_buff_head ppodq; 199 struct sk_buff_head backlogq; 200 struct sk_buff_head skbq; 201 struct sk_buff *wr_pending_head; 202 struct sk_buff *wr_pending_tail; 203 struct sk_buff *skb; 204 struct sk_buff *lro_skb; 205 struct sk_buff *lro_hskb; 206 struct list_head accept_node; 207 /* socket lock */ 208 spinlock_t lock; 209 wait_queue_head_t waitq; 210 bool lock_owner; 211 struct kref kref; 212 u32 max_iso_npdu; 213 u32 wr_cred; 214 u32 wr_una_cred; 215 u32 wr_max_cred; 216 u32 snd_una; 217 u32 tid; 218 u32 snd_nxt; 219 u32 rcv_nxt; 220 u32 smac_idx; 221 u32 tx_chan; 222 u32 mtu; 223 u32 write_seq; 224 u32 rx_credits; 225 u32 snd_win; 226 u32 rcv_win; 227 u16 mss; 228 u16 emss; 229 u16 plen; 230 u16 rss_qid; 231 u16 txq_idx; 232 u16 ctrlq_idx; 233 u8 tos; 234 u8 port_id; 235 #define CXGBIT_SUBMODE_HCRC 0x1 236 #define CXGBIT_SUBMODE_DCRC 0x2 237 u8 submode; 238 #ifdef CONFIG_CHELSIO_T4_DCB 239 u8 dcb_priority; 240 #endif 241 u8 snd_wscale; 242 }; 243 244 void _cxgbit_free_cdev(struct kref *kref); 245 void _cxgbit_free_csk(struct kref *kref); 246 void _cxgbit_free_cnp(struct kref *kref); 247 248 static inline void cxgbit_get_cdev(struct cxgbit_device *cdev) 249 { 250 kref_get(&cdev->kref); 251 } 252 253 static inline void cxgbit_put_cdev(struct cxgbit_device *cdev) 254 { 255 kref_put(&cdev->kref, _cxgbit_free_cdev); 256 } 257 258 static inline void cxgbit_get_csk(struct cxgbit_sock *csk) 259 { 260 kref_get(&csk->kref); 261 } 262 263 static inline void cxgbit_put_csk(struct cxgbit_sock *csk) 264 { 265 kref_put(&csk->kref, _cxgbit_free_csk); 266 } 267 268 static inline void cxgbit_get_cnp(struct cxgbit_np *cnp) 269 { 270 kref_get(&cnp->kref); 271 } 272 273 static inline void cxgbit_put_cnp(struct cxgbit_np *cnp) 274 { 275 kref_put(&cnp->kref, _cxgbit_free_cnp); 276 } 277 278 static inline void cxgbit_sock_reset_wr_list(struct cxgbit_sock *csk) 279 { 280 csk->wr_pending_tail = NULL; 281 csk->wr_pending_head = NULL; 282 } 283 284 static inline struct sk_buff *cxgbit_sock_peek_wr(const struct cxgbit_sock *csk) 285 { 286 return csk->wr_pending_head; 287 } 288 289 static inline void 290 cxgbit_sock_enqueue_wr(struct cxgbit_sock *csk, struct sk_buff *skb) 291 { 292 cxgbit_skcb_tx_wr_next(skb) = NULL; 293 294 skb_get(skb); 295 296 if (!csk->wr_pending_head) 297 csk->wr_pending_head = skb; 298 else 299 cxgbit_skcb_tx_wr_next(csk->wr_pending_tail) = skb; 300 csk->wr_pending_tail = skb; 301 } 302 303 static inline struct sk_buff *cxgbit_sock_dequeue_wr(struct cxgbit_sock *csk) 304 { 305 struct sk_buff *skb = csk->wr_pending_head; 306 307 if (likely(skb)) { 308 csk->wr_pending_head = cxgbit_skcb_tx_wr_next(skb); 309 cxgbit_skcb_tx_wr_next(skb) = NULL; 310 } 311 return skb; 312 } 313 314 typedef void (*cxgbit_cplhandler_func)(struct cxgbit_device *, 315 struct sk_buff *); 316 317 int cxgbit_setup_np(struct iscsi_np *, struct sockaddr_storage *); 318 int cxgbit_setup_conn_digest(struct cxgbit_sock *); 319 int cxgbit_accept_np(struct iscsi_np *, struct iscsit_conn *); 320 void cxgbit_free_np(struct iscsi_np *); 321 void cxgbit_abort_conn(struct cxgbit_sock *csk); 322 void cxgbit_free_conn(struct iscsit_conn *); 323 extern cxgbit_cplhandler_func cxgbit_cplhandlers[NUM_CPL_CMDS]; 324 int cxgbit_get_login_rx(struct iscsit_conn *, struct iscsi_login *); 325 int cxgbit_rx_data_ack(struct cxgbit_sock *); 326 int cxgbit_l2t_send(struct cxgbit_device *, struct sk_buff *, 327 struct l2t_entry *); 328 void cxgbit_push_tx_frames(struct cxgbit_sock *); 329 int cxgbit_put_login_tx(struct iscsit_conn *, struct iscsi_login *, u32); 330 int cxgbit_xmit_pdu(struct iscsit_conn *, struct iscsit_cmd *, 331 struct iscsi_datain_req *, const void *, u32); 332 void cxgbit_get_r2t_ttt(struct iscsit_conn *, struct iscsit_cmd *, 333 struct iscsi_r2t *); 334 u32 cxgbit_send_tx_flowc_wr(struct cxgbit_sock *); 335 int cxgbit_ofld_send(struct cxgbit_device *, struct sk_buff *); 336 void cxgbit_get_rx_pdu(struct iscsit_conn *); 337 int cxgbit_validate_params(struct iscsit_conn *); 338 struct cxgbit_device *cxgbit_find_device(struct net_device *, u8 *); 339 340 /* DDP */ 341 int cxgbit_ddp_init(struct cxgbit_device *); 342 int cxgbit_setup_conn_pgidx(struct cxgbit_sock *, u32); 343 int cxgbit_reserve_ttt(struct cxgbit_sock *, struct iscsit_cmd *); 344 void cxgbit_unmap_cmd(struct iscsit_conn *, struct iscsit_cmd *); 345 346 static inline 347 struct cxgbi_ppm *cdev2ppm(struct cxgbit_device *cdev) 348 { 349 return (struct cxgbi_ppm *)(*cdev->lldi.iscsi_ppm); 350 } 351 #endif /* __CXGBIT_H__ */ 352