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 44/* CPL message priority levels */ 45enum { 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_V(FW_TP_WR) | \ 56 FW_WR_IMMDLEN_V(sizeof(*w) - sizeof(w->wr))); \ 57 (w)->wr.wr_mid = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*w), 16)) | \ 58 FW_WR_FLOWID_V(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_V(FW_ULPTX_WR) | \ 69 FW_WR_ATOMIC_V(atomic)); \ 70 (w)->wr.wr_mid = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(wrlen, 16)) | \ 71 FW_WR_FLOWID_V(tid)); \ 72 (w)->wr.wr_lo = cpu_to_be64(0); \ 73} while (0) 74 75/* Special asynchronous notification message */ 76#define CXGB4_MSG_AN ((void *)1) 77 78struct serv_entry { 79 void *data; 80}; 81 82union aopen_entry { 83 void *data; 84 union aopen_entry *next; 85}; 86 87/* 88 * Holds the size, base address, free list start, etc of the TID, server TID, 89 * and active-open TID tables. The tables themselves are allocated dynamically. 90 */ 91struct tid_info { 92 void **tid_tab; 93 unsigned int ntids; 94 95 struct serv_entry *stid_tab; 96 unsigned long *stid_bmap; 97 unsigned int nstids; 98 unsigned int stid_base; 99 100 union aopen_entry *atid_tab; 101 unsigned int natids; 102 unsigned int atid_base; 103 104 struct filter_entry *ftid_tab; 105 unsigned int nftids; 106 unsigned int ftid_base; 107 unsigned int aftid_base; 108 unsigned int aftid_end; 109 /* Server filter region */ 110 unsigned int sftid_base; 111 unsigned int nsftids; 112 113 spinlock_t atid_lock ____cacheline_aligned_in_smp; 114 union aopen_entry *afree; 115 unsigned int atids_in_use; 116 117 spinlock_t stid_lock; 118 unsigned int stids_in_use; 119 120 atomic_t tids_in_use; 121}; 122 123static inline void *lookup_tid(const struct tid_info *t, unsigned int tid) 124{ 125 return tid < t->ntids ? t->tid_tab[tid] : NULL; 126} 127 128static inline void *lookup_atid(const struct tid_info *t, unsigned int atid) 129{ 130 return atid < t->natids ? t->atid_tab[atid].data : NULL; 131} 132 133static inline void *lookup_stid(const struct tid_info *t, unsigned int stid) 134{ 135 /* Is it a server filter TID? */ 136 if (t->nsftids && (stid >= t->sftid_base)) { 137 stid -= t->sftid_base; 138 stid += t->nstids; 139 } else { 140 stid -= t->stid_base; 141 } 142 143 return stid < (t->nstids + t->nsftids) ? t->stid_tab[stid].data : NULL; 144} 145 146static inline void cxgb4_insert_tid(struct tid_info *t, void *data, 147 unsigned int tid) 148{ 149 t->tid_tab[tid] = data; 150 atomic_inc(&t->tids_in_use); 151} 152 153int cxgb4_alloc_atid(struct tid_info *t, void *data); 154int cxgb4_alloc_stid(struct tid_info *t, int family, void *data); 155int cxgb4_alloc_sftid(struct tid_info *t, int family, void *data); 156void cxgb4_free_atid(struct tid_info *t, unsigned int atid); 157void cxgb4_free_stid(struct tid_info *t, unsigned int stid, int family); 158void cxgb4_remove_tid(struct tid_info *t, unsigned int qid, unsigned int tid); 159 160struct in6_addr; 161 162int cxgb4_create_server(const struct net_device *dev, unsigned int stid, 163 __be32 sip, __be16 sport, __be16 vlan, 164 unsigned int queue); 165int cxgb4_create_server6(const struct net_device *dev, unsigned int stid, 166 const struct in6_addr *sip, __be16 sport, 167 unsigned int queue); 168int cxgb4_remove_server(const struct net_device *dev, unsigned int stid, 169 unsigned int queue, bool ipv6); 170int cxgb4_create_server_filter(const struct net_device *dev, unsigned int stid, 171 __be32 sip, __be16 sport, __be16 vlan, 172 unsigned int queue, 173 unsigned char port, unsigned char mask); 174int cxgb4_remove_server_filter(const struct net_device *dev, unsigned int stid, 175 unsigned int queue, bool ipv6); 176 177static inline void set_wr_txq(struct sk_buff *skb, int prio, int queue) 178{ 179 skb_set_queue_mapping(skb, (queue << 1) | prio); 180} 181 182enum cxgb4_uld { 183 CXGB4_ULD_RDMA, 184 CXGB4_ULD_ISCSI, 185 CXGB4_ULD_MAX 186}; 187 188enum cxgb4_state { 189 CXGB4_STATE_UP, 190 CXGB4_STATE_START_RECOVERY, 191 CXGB4_STATE_DOWN, 192 CXGB4_STATE_DETACH 193}; 194 195enum cxgb4_control { 196 CXGB4_CONTROL_DB_FULL, 197 CXGB4_CONTROL_DB_EMPTY, 198 CXGB4_CONTROL_DB_DROP, 199}; 200 201struct pci_dev; 202struct l2t_data; 203struct net_device; 204struct pkt_gl; 205struct tp_tcp_stats; 206 207struct cxgb4_range { 208 unsigned int start; 209 unsigned int size; 210}; 211 212struct cxgb4_virt_res { /* virtualized HW resources */ 213 struct cxgb4_range ddp; 214 struct cxgb4_range iscsi; 215 struct cxgb4_range stag; 216 struct cxgb4_range rq; 217 struct cxgb4_range pbl; 218 struct cxgb4_range qp; 219 struct cxgb4_range cq; 220 struct cxgb4_range ocq; 221}; 222 223#define OCQ_WIN_OFFSET(pdev, vres) \ 224 (pci_resource_len((pdev), 2) - roundup_pow_of_two((vres)->ocq.size)) 225 226/* 227 * Block of information the LLD provides to ULDs attaching to a device. 228 */ 229struct cxgb4_lld_info { 230 struct pci_dev *pdev; /* associated PCI device */ 231 struct l2t_data *l2t; /* L2 table */ 232 struct tid_info *tids; /* TID table */ 233 struct net_device **ports; /* device ports */ 234 const struct cxgb4_virt_res *vr; /* assorted HW resources */ 235 const unsigned short *mtus; /* MTU table */ 236 const unsigned short *rxq_ids; /* the ULD's Rx queue ids */ 237 const unsigned short *ciq_ids; /* the ULD's concentrator IQ ids */ 238 unsigned short nrxq; /* # of Rx queues */ 239 unsigned short ntxq; /* # of Tx queues */ 240 unsigned short nciq; /* # of concentrator IQ */ 241 unsigned char nchan:4; /* # of channels */ 242 unsigned char nports:4; /* # of ports */ 243 unsigned char wr_cred; /* WR 16-byte credits */ 244 unsigned char adapter_type; /* type of adapter */ 245 unsigned char fw_api_ver; /* FW API version */ 246 unsigned int fw_vers; /* FW version */ 247 unsigned int iscsi_iolen; /* iSCSI max I/O length */ 248 unsigned int cclk_ps; /* Core clock period in psec */ 249 unsigned short udb_density; /* # of user DB/page */ 250 unsigned short ucq_density; /* # of user CQs/page */ 251 unsigned short filt_mode; /* filter optional components */ 252 unsigned short tx_modq[NCHAN]; /* maps each tx channel to a */ 253 /* scheduler queue */ 254 void __iomem *gts_reg; /* address of GTS register */ 255 void __iomem *db_reg; /* address of kernel doorbell */ 256 int dbfifo_int_thresh; /* doorbell fifo int threshold */ 257 unsigned int sge_ingpadboundary; /* SGE ingress padding boundary */ 258 unsigned int sge_egrstatuspagesize; /* SGE egress status page size */ 259 unsigned int sge_pktshift; /* Padding between CPL and */ 260 /* packet data */ 261 unsigned int pf; /* Physical Function we're using */ 262 bool enable_fw_ofld_conn; /* Enable connection through fw */ 263 /* WR */ 264 unsigned int max_ordird_qp; /* Max ORD/IRD depth per RDMA QP */ 265 unsigned int max_ird_adapter; /* Max IRD memory per adapter */ 266 bool ulptx_memwrite_dsgl; /* use of T5 DSGL allowed */ 267}; 268 269struct cxgb4_uld_info { 270 const char *name; 271 void *(*add)(const struct cxgb4_lld_info *p); 272 int (*rx_handler)(void *handle, const __be64 *rsp, 273 const struct pkt_gl *gl); 274 int (*state_change)(void *handle, enum cxgb4_state new_state); 275 int (*control)(void *handle, enum cxgb4_control control, ...); 276}; 277 278int cxgb4_register_uld(enum cxgb4_uld type, const struct cxgb4_uld_info *p); 279int cxgb4_unregister_uld(enum cxgb4_uld type); 280int cxgb4_ofld_send(struct net_device *dev, struct sk_buff *skb); 281unsigned int cxgb4_dbfifo_count(const struct net_device *dev, int lpfifo); 282unsigned int cxgb4_port_chan(const struct net_device *dev); 283unsigned int cxgb4_port_viid(const struct net_device *dev); 284unsigned int cxgb4_port_idx(const struct net_device *dev); 285unsigned int cxgb4_best_mtu(const unsigned short *mtus, unsigned short mtu, 286 unsigned int *idx); 287unsigned int cxgb4_best_aligned_mtu(const unsigned short *mtus, 288 unsigned short header_size, 289 unsigned short data_size_max, 290 unsigned short data_size_align, 291 unsigned int *mtu_idxp); 292void cxgb4_get_tcp_stats(struct pci_dev *pdev, struct tp_tcp_stats *v4, 293 struct tp_tcp_stats *v6); 294void cxgb4_iscsi_init(struct net_device *dev, unsigned int tag_mask, 295 const unsigned int *pgsz_order); 296struct sk_buff *cxgb4_pktgl_to_skb(const struct pkt_gl *gl, 297 unsigned int skb_len, unsigned int pull_len); 298int cxgb4_sync_txq_pidx(struct net_device *dev, u16 qid, u16 pidx, u16 size); 299int cxgb4_flush_eq_cache(struct net_device *dev); 300void cxgb4_disable_db_coalescing(struct net_device *dev); 301void cxgb4_enable_db_coalescing(struct net_device *dev); 302int cxgb4_read_tpte(struct net_device *dev, u32 stag, __be32 *tpte); 303u64 cxgb4_read_sge_timestamp(struct net_device *dev); 304 305enum cxgb4_bar2_qtype { CXGB4_BAR2_QTYPE_EGRESS, CXGB4_BAR2_QTYPE_INGRESS }; 306int cxgb4_bar2_sge_qregs(struct net_device *dev, 307 unsigned int qid, 308 enum cxgb4_bar2_qtype qtype, 309 u64 *pbar2_qoffset, 310 unsigned int *pbar2_qid); 311 312#endif /* !__CXGB4_OFLD_H */ 313