1 /* 2 * This file is part of the Chelsio T4 Ethernet driver for Linux. 3 * 4 * Copyright (c) 2003-2014 Chelsio Communications, Inc. All rights reserved. 5 * 6 * This software is available to you under a choice of one of two 7 * licenses. You may choose to be licensed under the terms of the GNU 8 * General Public License (GPL) Version 2, available from the file 9 * COPYING in the main directory of this source tree, or the 10 * OpenIB.org BSD license below: 11 * 12 * Redistribution and use in source and binary forms, with or 13 * without modification, are permitted provided that the following 14 * conditions are met: 15 * 16 * - Redistributions of source code must retain the above 17 * copyright notice, this list of conditions and the following 18 * disclaimer. 19 * 20 * - Redistributions in binary form must reproduce the above 21 * copyright notice, this list of conditions and the following 22 * disclaimer in the documentation and/or other materials 23 * provided with the distribution. 24 * 25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 32 * SOFTWARE. 33 */ 34 35 #ifndef __CXGB4_OFLD_H 36 #define __CXGB4_OFLD_H 37 38 #include <linux/cache.h> 39 #include <linux/spinlock.h> 40 #include <linux/skbuff.h> 41 #include <linux/inetdevice.h> 42 #include <linux/atomic.h> 43 #include "cxgb4.h" 44 45 /* CPL message priority levels */ 46 enum { 47 CPL_PRIORITY_DATA = 0, /* data messages */ 48 CPL_PRIORITY_SETUP = 1, /* connection setup messages */ 49 CPL_PRIORITY_TEARDOWN = 0, /* connection teardown messages */ 50 CPL_PRIORITY_LISTEN = 1, /* listen start/stop messages */ 51 CPL_PRIORITY_ACK = 1, /* RX ACK messages */ 52 CPL_PRIORITY_CONTROL = 1 /* control messages */ 53 }; 54 55 #define INIT_TP_WR(w, tid) do { \ 56 (w)->wr.wr_hi = htonl(FW_WR_OP_V(FW_TP_WR) | \ 57 FW_WR_IMMDLEN_V(sizeof(*w) - sizeof(w->wr))); \ 58 (w)->wr.wr_mid = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*w), 16)) | \ 59 FW_WR_FLOWID_V(tid)); \ 60 (w)->wr.wr_lo = cpu_to_be64(0); \ 61 } while (0) 62 63 #define INIT_TP_WR_CPL(w, cpl, tid) do { \ 64 INIT_TP_WR(w, tid); \ 65 OPCODE_TID(w) = htonl(MK_OPCODE_TID(cpl, tid)); \ 66 } while (0) 67 68 #define INIT_ULPTX_WR(w, wrlen, atomic, tid) do { \ 69 (w)->wr.wr_hi = htonl(FW_WR_OP_V(FW_ULPTX_WR) | \ 70 FW_WR_ATOMIC_V(atomic)); \ 71 (w)->wr.wr_mid = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(wrlen, 16)) | \ 72 FW_WR_FLOWID_V(tid)); \ 73 (w)->wr.wr_lo = cpu_to_be64(0); \ 74 } while (0) 75 76 /* Special asynchronous notification message */ 77 #define CXGB4_MSG_AN ((void *)1) 78 79 struct serv_entry { 80 void *data; 81 }; 82 83 union aopen_entry { 84 void *data; 85 union aopen_entry *next; 86 }; 87 88 /* 89 * Holds the size, base address, free list start, etc of the TID, server TID, 90 * and active-open TID tables. The tables themselves are allocated dynamically. 91 */ 92 struct tid_info { 93 void **tid_tab; 94 unsigned int ntids; 95 96 struct serv_entry *stid_tab; 97 unsigned long *stid_bmap; 98 unsigned int nstids; 99 unsigned int stid_base; 100 unsigned int hash_base; 101 102 union aopen_entry *atid_tab; 103 unsigned int natids; 104 unsigned int atid_base; 105 106 struct filter_entry *ftid_tab; 107 unsigned int nftids; 108 unsigned int ftid_base; 109 unsigned int aftid_base; 110 unsigned int aftid_end; 111 /* Server filter region */ 112 unsigned int sftid_base; 113 unsigned int nsftids; 114 115 spinlock_t atid_lock ____cacheline_aligned_in_smp; 116 union aopen_entry *afree; 117 unsigned int atids_in_use; 118 119 spinlock_t stid_lock; 120 unsigned int stids_in_use; 121 unsigned int sftids_in_use; 122 123 /* TIDs in the TCAM */ 124 atomic_t tids_in_use; 125 /* TIDs in the HASH */ 126 atomic_t hash_tids_in_use; 127 }; 128 129 static inline void *lookup_tid(const struct tid_info *t, unsigned int tid) 130 { 131 return tid < t->ntids ? t->tid_tab[tid] : NULL; 132 } 133 134 static inline void *lookup_atid(const struct tid_info *t, unsigned int atid) 135 { 136 return atid < t->natids ? t->atid_tab[atid].data : NULL; 137 } 138 139 static inline void *lookup_stid(const struct tid_info *t, unsigned int stid) 140 { 141 /* Is it a server filter TID? */ 142 if (t->nsftids && (stid >= t->sftid_base)) { 143 stid -= t->sftid_base; 144 stid += t->nstids; 145 } else { 146 stid -= t->stid_base; 147 } 148 149 return stid < (t->nstids + t->nsftids) ? t->stid_tab[stid].data : NULL; 150 } 151 152 static inline void cxgb4_insert_tid(struct tid_info *t, void *data, 153 unsigned int tid) 154 { 155 t->tid_tab[tid] = data; 156 if (t->hash_base && (tid >= t->hash_base)) 157 atomic_inc(&t->hash_tids_in_use); 158 else 159 atomic_inc(&t->tids_in_use); 160 } 161 162 int cxgb4_alloc_atid(struct tid_info *t, void *data); 163 int cxgb4_alloc_stid(struct tid_info *t, int family, void *data); 164 int cxgb4_alloc_sftid(struct tid_info *t, int family, void *data); 165 void cxgb4_free_atid(struct tid_info *t, unsigned int atid); 166 void cxgb4_free_stid(struct tid_info *t, unsigned int stid, int family); 167 void cxgb4_remove_tid(struct tid_info *t, unsigned int qid, unsigned int tid); 168 169 struct in6_addr; 170 171 int cxgb4_create_server(const struct net_device *dev, unsigned int stid, 172 __be32 sip, __be16 sport, __be16 vlan, 173 unsigned int queue); 174 int cxgb4_create_server6(const struct net_device *dev, unsigned int stid, 175 const struct in6_addr *sip, __be16 sport, 176 unsigned int queue); 177 int cxgb4_remove_server(const struct net_device *dev, unsigned int stid, 178 unsigned int queue, bool ipv6); 179 int cxgb4_create_server_filter(const struct net_device *dev, unsigned int stid, 180 __be32 sip, __be16 sport, __be16 vlan, 181 unsigned int queue, 182 unsigned char port, unsigned char mask); 183 int cxgb4_remove_server_filter(const struct net_device *dev, unsigned int stid, 184 unsigned int queue, bool ipv6); 185 186 static inline void set_wr_txq(struct sk_buff *skb, int prio, int queue) 187 { 188 skb_set_queue_mapping(skb, (queue << 1) | prio); 189 } 190 191 enum cxgb4_uld { 192 CXGB4_ULD_RDMA, 193 CXGB4_ULD_ISCSI, 194 CXGB4_ULD_ISCSIT, 195 CXGB4_ULD_MAX 196 }; 197 198 enum cxgb4_state { 199 CXGB4_STATE_UP, 200 CXGB4_STATE_START_RECOVERY, 201 CXGB4_STATE_DOWN, 202 CXGB4_STATE_DETACH 203 }; 204 205 enum cxgb4_control { 206 CXGB4_CONTROL_DB_FULL, 207 CXGB4_CONTROL_DB_EMPTY, 208 CXGB4_CONTROL_DB_DROP, 209 }; 210 211 struct pci_dev; 212 struct l2t_data; 213 struct net_device; 214 struct pkt_gl; 215 struct tp_tcp_stats; 216 struct t4_lro_mgr; 217 218 struct cxgb4_range { 219 unsigned int start; 220 unsigned int size; 221 }; 222 223 struct cxgb4_virt_res { /* virtualized HW resources */ 224 struct cxgb4_range ddp; 225 struct cxgb4_range iscsi; 226 struct cxgb4_range stag; 227 struct cxgb4_range rq; 228 struct cxgb4_range pbl; 229 struct cxgb4_range qp; 230 struct cxgb4_range cq; 231 struct cxgb4_range ocq; 232 }; 233 234 #define OCQ_WIN_OFFSET(pdev, vres) \ 235 (pci_resource_len((pdev), 2) - roundup_pow_of_two((vres)->ocq.size)) 236 237 /* 238 * Block of information the LLD provides to ULDs attaching to a device. 239 */ 240 struct cxgb4_lld_info { 241 struct pci_dev *pdev; /* associated PCI device */ 242 struct l2t_data *l2t; /* L2 table */ 243 struct tid_info *tids; /* TID table */ 244 struct net_device **ports; /* device ports */ 245 const struct cxgb4_virt_res *vr; /* assorted HW resources */ 246 const unsigned short *mtus; /* MTU table */ 247 const unsigned short *rxq_ids; /* the ULD's Rx queue ids */ 248 const unsigned short *ciq_ids; /* the ULD's concentrator IQ ids */ 249 unsigned short nrxq; /* # of Rx queues */ 250 unsigned short ntxq; /* # of Tx queues */ 251 unsigned short nciq; /* # of concentrator IQ */ 252 unsigned char nchan:4; /* # of channels */ 253 unsigned char nports:4; /* # of ports */ 254 unsigned char wr_cred; /* WR 16-byte credits */ 255 unsigned char adapter_type; /* type of adapter */ 256 unsigned char fw_api_ver; /* FW API version */ 257 unsigned int fw_vers; /* FW version */ 258 unsigned int iscsi_iolen; /* iSCSI max I/O length */ 259 unsigned int cclk_ps; /* Core clock period in psec */ 260 unsigned short udb_density; /* # of user DB/page */ 261 unsigned short ucq_density; /* # of user CQs/page */ 262 unsigned short filt_mode; /* filter optional components */ 263 unsigned short tx_modq[NCHAN]; /* maps each tx channel to a */ 264 /* scheduler queue */ 265 void __iomem *gts_reg; /* address of GTS register */ 266 void __iomem *db_reg; /* address of kernel doorbell */ 267 int dbfifo_int_thresh; /* doorbell fifo int threshold */ 268 unsigned int sge_ingpadboundary; /* SGE ingress padding boundary */ 269 unsigned int sge_egrstatuspagesize; /* SGE egress status page size */ 270 unsigned int sge_pktshift; /* Padding between CPL and */ 271 /* packet data */ 272 unsigned int pf; /* Physical Function we're using */ 273 bool enable_fw_ofld_conn; /* Enable connection through fw */ 274 /* WR */ 275 unsigned int max_ordird_qp; /* Max ORD/IRD depth per RDMA QP */ 276 unsigned int max_ird_adapter; /* Max IRD memory per adapter */ 277 bool ulptx_memwrite_dsgl; /* use of T5 DSGL allowed */ 278 unsigned int iscsi_tagmask; /* iscsi ddp tag mask */ 279 unsigned int iscsi_pgsz_order; /* iscsi ddp page size orders */ 280 unsigned int iscsi_llimit; /* chip's iscsi region llimit */ 281 void **iscsi_ppm; /* iscsi page pod manager */ 282 int nodeid; /* device numa node id */ 283 }; 284 285 struct cxgb4_uld_info { 286 const char *name; 287 void *(*add)(const struct cxgb4_lld_info *p); 288 int (*rx_handler)(void *handle, const __be64 *rsp, 289 const struct pkt_gl *gl); 290 int (*state_change)(void *handle, enum cxgb4_state new_state); 291 int (*control)(void *handle, enum cxgb4_control control, ...); 292 int (*lro_rx_handler)(void *handle, const __be64 *rsp, 293 const struct pkt_gl *gl, 294 struct t4_lro_mgr *lro_mgr, 295 struct napi_struct *napi); 296 void (*lro_flush)(struct t4_lro_mgr *); 297 }; 298 299 int cxgb4_register_uld(enum cxgb4_uld type, const struct cxgb4_uld_info *p); 300 int cxgb4_unregister_uld(enum cxgb4_uld type); 301 int cxgb4_ofld_send(struct net_device *dev, struct sk_buff *skb); 302 unsigned int cxgb4_dbfifo_count(const struct net_device *dev, int lpfifo); 303 unsigned int cxgb4_port_chan(const struct net_device *dev); 304 unsigned int cxgb4_port_viid(const struct net_device *dev); 305 unsigned int cxgb4_tp_smt_idx(enum chip_type chip, unsigned int viid); 306 unsigned int cxgb4_port_idx(const struct net_device *dev); 307 unsigned int cxgb4_best_mtu(const unsigned short *mtus, unsigned short mtu, 308 unsigned int *idx); 309 unsigned int cxgb4_best_aligned_mtu(const unsigned short *mtus, 310 unsigned short header_size, 311 unsigned short data_size_max, 312 unsigned short data_size_align, 313 unsigned int *mtu_idxp); 314 void cxgb4_get_tcp_stats(struct pci_dev *pdev, struct tp_tcp_stats *v4, 315 struct tp_tcp_stats *v6); 316 void cxgb4_iscsi_init(struct net_device *dev, unsigned int tag_mask, 317 const unsigned int *pgsz_order); 318 struct sk_buff *cxgb4_pktgl_to_skb(const struct pkt_gl *gl, 319 unsigned int skb_len, unsigned int pull_len); 320 int cxgb4_sync_txq_pidx(struct net_device *dev, u16 qid, u16 pidx, u16 size); 321 int cxgb4_flush_eq_cache(struct net_device *dev); 322 int cxgb4_read_tpte(struct net_device *dev, u32 stag, __be32 *tpte); 323 u64 cxgb4_read_sge_timestamp(struct net_device *dev); 324 325 enum cxgb4_bar2_qtype { CXGB4_BAR2_QTYPE_EGRESS, CXGB4_BAR2_QTYPE_INGRESS }; 326 int cxgb4_bar2_sge_qregs(struct net_device *dev, 327 unsigned int qid, 328 enum cxgb4_bar2_qtype qtype, 329 int user, 330 u64 *pbar2_qoffset, 331 unsigned int *pbar2_qid); 332 333 #endif /* !__CXGB4_OFLD_H */ 334