1 /* 2 * This file is part of the Chelsio T4 Ethernet driver for Linux. 3 * 4 * Copyright (c) 2003-2010 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 44 /* CPL message priority levels */ 45 enum { 46 CPL_PRIORITY_DATA = 0, /* data messages */ 47 CPL_PRIORITY_SETUP = 1, /* connection setup messages */ 48 CPL_PRIORITY_TEARDOWN = 0, /* connection teardown messages */ 49 CPL_PRIORITY_LISTEN = 1, /* listen start/stop messages */ 50 CPL_PRIORITY_ACK = 1, /* RX ACK messages */ 51 CPL_PRIORITY_CONTROL = 1 /* control messages */ 52 }; 53 54 #define INIT_TP_WR(w, tid) do { \ 55 (w)->wr.wr_hi = htonl(FW_WR_OP(FW_TP_WR) | \ 56 FW_WR_IMMDLEN(sizeof(*w) - sizeof(w->wr))); \ 57 (w)->wr.wr_mid = htonl(FW_WR_LEN16(DIV_ROUND_UP(sizeof(*w), 16)) | \ 58 FW_WR_FLOWID(tid)); \ 59 (w)->wr.wr_lo = cpu_to_be64(0); \ 60 } while (0) 61 62 #define INIT_TP_WR_CPL(w, cpl, tid) do { \ 63 INIT_TP_WR(w, tid); \ 64 OPCODE_TID(w) = htonl(MK_OPCODE_TID(cpl, tid)); \ 65 } while (0) 66 67 #define INIT_ULPTX_WR(w, wrlen, atomic, tid) do { \ 68 (w)->wr.wr_hi = htonl(FW_WR_OP(FW_ULPTX_WR) | FW_WR_ATOMIC(atomic)); \ 69 (w)->wr.wr_mid = htonl(FW_WR_LEN16(DIV_ROUND_UP(wrlen, 16)) | \ 70 FW_WR_FLOWID(tid)); \ 71 (w)->wr.wr_lo = cpu_to_be64(0); \ 72 } while (0) 73 74 /* Special asynchronous notification message */ 75 #define CXGB4_MSG_AN ((void *)1) 76 77 struct serv_entry { 78 void *data; 79 }; 80 81 union aopen_entry { 82 void *data; 83 union aopen_entry *next; 84 }; 85 86 /* 87 * Holds the size, base address, free list start, etc of the TID, server TID, 88 * and active-open TID tables. The tables themselves are allocated dynamically. 89 */ 90 struct tid_info { 91 void **tid_tab; 92 unsigned int ntids; 93 94 struct serv_entry *stid_tab; 95 unsigned long *stid_bmap; 96 unsigned int nstids; 97 unsigned int stid_base; 98 99 union aopen_entry *atid_tab; 100 unsigned int natids; 101 unsigned int atid_base; 102 103 struct filter_entry *ftid_tab; 104 unsigned int nftids; 105 unsigned int ftid_base; 106 unsigned int aftid_base; 107 unsigned int aftid_end; 108 /* Server filter region */ 109 unsigned int sftid_base; 110 unsigned int nsftids; 111 112 spinlock_t atid_lock ____cacheline_aligned_in_smp; 113 union aopen_entry *afree; 114 unsigned int atids_in_use; 115 116 spinlock_t stid_lock; 117 unsigned int stids_in_use; 118 119 atomic_t tids_in_use; 120 }; 121 122 static inline void *lookup_tid(const struct tid_info *t, unsigned int tid) 123 { 124 return tid < t->ntids ? t->tid_tab[tid] : NULL; 125 } 126 127 static inline void *lookup_atid(const struct tid_info *t, unsigned int atid) 128 { 129 return atid < t->natids ? t->atid_tab[atid].data : NULL; 130 } 131 132 static inline void *lookup_stid(const struct tid_info *t, unsigned int stid) 133 { 134 /* Is it a server filter TID? */ 135 if (t->nsftids && (stid >= t->sftid_base)) { 136 stid -= t->sftid_base; 137 stid += t->nstids; 138 } else { 139 stid -= t->stid_base; 140 } 141 142 return stid < (t->nstids + t->nsftids) ? t->stid_tab[stid].data : NULL; 143 } 144 145 static inline void cxgb4_insert_tid(struct tid_info *t, void *data, 146 unsigned int tid) 147 { 148 t->tid_tab[tid] = data; 149 atomic_inc(&t->tids_in_use); 150 } 151 152 int cxgb4_alloc_atid(struct tid_info *t, void *data); 153 int cxgb4_alloc_stid(struct tid_info *t, int family, void *data); 154 int cxgb4_alloc_sftid(struct tid_info *t, int family, void *data); 155 void cxgb4_free_atid(struct tid_info *t, unsigned int atid); 156 void cxgb4_free_stid(struct tid_info *t, unsigned int stid, int family); 157 void cxgb4_remove_tid(struct tid_info *t, unsigned int qid, unsigned int tid); 158 159 struct in6_addr; 160 161 int cxgb4_create_server(const struct net_device *dev, unsigned int stid, 162 __be32 sip, __be16 sport, __be16 vlan, 163 unsigned int queue); 164 int cxgb4_create_server6(const struct net_device *dev, unsigned int stid, 165 const struct in6_addr *sip, __be16 sport, 166 unsigned int queue); 167 int cxgb4_remove_server(const struct net_device *dev, unsigned int stid, 168 unsigned int queue, bool ipv6); 169 int cxgb4_create_server_filter(const struct net_device *dev, unsigned int stid, 170 __be32 sip, __be16 sport, __be16 vlan, 171 unsigned int queue, 172 unsigned char port, unsigned char mask); 173 int cxgb4_remove_server_filter(const struct net_device *dev, unsigned int stid, 174 unsigned int queue, bool ipv6); 175 static inline void set_wr_txq(struct sk_buff *skb, int prio, int queue) 176 { 177 skb_set_queue_mapping(skb, (queue << 1) | prio); 178 } 179 180 enum cxgb4_uld { 181 CXGB4_ULD_RDMA, 182 CXGB4_ULD_ISCSI, 183 CXGB4_ULD_MAX 184 }; 185 186 enum cxgb4_state { 187 CXGB4_STATE_UP, 188 CXGB4_STATE_START_RECOVERY, 189 CXGB4_STATE_DOWN, 190 CXGB4_STATE_DETACH 191 }; 192 193 enum cxgb4_control { 194 CXGB4_CONTROL_DB_FULL, 195 CXGB4_CONTROL_DB_EMPTY, 196 CXGB4_CONTROL_DB_DROP, 197 }; 198 199 struct pci_dev; 200 struct l2t_data; 201 struct net_device; 202 struct pkt_gl; 203 struct tp_tcp_stats; 204 205 struct cxgb4_range { 206 unsigned int start; 207 unsigned int size; 208 }; 209 210 struct cxgb4_virt_res { /* virtualized HW resources */ 211 struct cxgb4_range ddp; 212 struct cxgb4_range iscsi; 213 struct cxgb4_range stag; 214 struct cxgb4_range rq; 215 struct cxgb4_range pbl; 216 struct cxgb4_range qp; 217 struct cxgb4_range cq; 218 struct cxgb4_range ocq; 219 }; 220 221 #define OCQ_WIN_OFFSET(pdev, vres) \ 222 (pci_resource_len((pdev), 2) - roundup_pow_of_two((vres)->ocq.size)) 223 224 /* 225 * Block of information the LLD provides to ULDs attaching to a device. 226 */ 227 struct cxgb4_lld_info { 228 struct pci_dev *pdev; /* associated PCI device */ 229 struct l2t_data *l2t; /* L2 table */ 230 struct tid_info *tids; /* TID table */ 231 struct net_device **ports; /* device ports */ 232 const struct cxgb4_virt_res *vr; /* assorted HW resources */ 233 const unsigned short *mtus; /* MTU table */ 234 const unsigned short *rxq_ids; /* the ULD's Rx queue ids */ 235 unsigned short nrxq; /* # of Rx queues */ 236 unsigned short ntxq; /* # of Tx queues */ 237 unsigned char nchan:4; /* # of channels */ 238 unsigned char nports:4; /* # of ports */ 239 unsigned char wr_cred; /* WR 16-byte credits */ 240 unsigned char adapter_type; /* type of adapter */ 241 unsigned char fw_api_ver; /* FW API version */ 242 unsigned int fw_vers; /* FW version */ 243 unsigned int iscsi_iolen; /* iSCSI max I/O length */ 244 unsigned short udb_density; /* # of user DB/page */ 245 unsigned short ucq_density; /* # of user CQs/page */ 246 unsigned short filt_mode; /* filter optional components */ 247 unsigned short tx_modq[NCHAN]; /* maps each tx channel to a */ 248 /* scheduler queue */ 249 void __iomem *gts_reg; /* address of GTS register */ 250 void __iomem *db_reg; /* address of kernel doorbell */ 251 int dbfifo_int_thresh; /* doorbell fifo int threshold */ 252 unsigned int sge_pktshift; /* Padding between CPL and */ 253 /* packet data */ 254 bool enable_fw_ofld_conn; /* Enable connection through fw */ 255 /* WR */ 256 bool ulptx_memwrite_dsgl; /* use of T5 DSGL allowed */ 257 }; 258 259 struct cxgb4_uld_info { 260 const char *name; 261 void *(*add)(const struct cxgb4_lld_info *p); 262 int (*rx_handler)(void *handle, const __be64 *rsp, 263 const struct pkt_gl *gl); 264 int (*state_change)(void *handle, enum cxgb4_state new_state); 265 int (*control)(void *handle, enum cxgb4_control control, ...); 266 }; 267 268 int cxgb4_register_uld(enum cxgb4_uld type, const struct cxgb4_uld_info *p); 269 int cxgb4_unregister_uld(enum cxgb4_uld type); 270 int cxgb4_ofld_send(struct net_device *dev, struct sk_buff *skb); 271 unsigned int cxgb4_dbfifo_count(const struct net_device *dev, int lpfifo); 272 unsigned int cxgb4_port_chan(const struct net_device *dev); 273 unsigned int cxgb4_port_viid(const struct net_device *dev); 274 unsigned int cxgb4_port_idx(const struct net_device *dev); 275 unsigned int cxgb4_best_mtu(const unsigned short *mtus, unsigned short mtu, 276 unsigned int *idx); 277 void cxgb4_get_tcp_stats(struct pci_dev *pdev, struct tp_tcp_stats *v4, 278 struct tp_tcp_stats *v6); 279 void cxgb4_iscsi_init(struct net_device *dev, unsigned int tag_mask, 280 const unsigned int *pgsz_order); 281 struct sk_buff *cxgb4_pktgl_to_skb(const struct pkt_gl *gl, 282 unsigned int skb_len, unsigned int pull_len); 283 int cxgb4_sync_txq_pidx(struct net_device *dev, u16 qid, u16 pidx, u16 size); 284 int cxgb4_flush_eq_cache(struct net_device *dev); 285 void cxgb4_disable_db_coalescing(struct net_device *dev); 286 void cxgb4_enable_db_coalescing(struct net_device *dev); 287 288 #endif /* !__CXGB4_OFLD_H */ 289