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/atomic.h> 42 43/* CPL message priority levels */ 44enum { 45 CPL_PRIORITY_DATA = 0, /* data messages */ 46 CPL_PRIORITY_SETUP = 1, /* connection setup messages */ 47 CPL_PRIORITY_TEARDOWN = 0, /* connection teardown messages */ 48 CPL_PRIORITY_LISTEN = 1, /* listen start/stop messages */ 49 CPL_PRIORITY_ACK = 1, /* RX ACK messages */ 50 CPL_PRIORITY_CONTROL = 1 /* control messages */ 51}; 52 53#define INIT_TP_WR(w, tid) do { \ 54 (w)->wr.wr_hi = htonl(FW_WR_OP(FW_TP_WR) | \ 55 FW_WR_IMMDLEN(sizeof(*w) - sizeof(w->wr))); \ 56 (w)->wr.wr_mid = htonl(FW_WR_LEN16(DIV_ROUND_UP(sizeof(*w), 16)) | \ 57 FW_WR_FLOWID(tid)); \ 58 (w)->wr.wr_lo = cpu_to_be64(0); \ 59} while (0) 60 61#define INIT_TP_WR_CPL(w, cpl, tid) do { \ 62 INIT_TP_WR(w, tid); \ 63 OPCODE_TID(w) = htonl(MK_OPCODE_TID(cpl, tid)); \ 64} while (0) 65 66#define INIT_ULPTX_WR(w, wrlen, atomic, tid) do { \ 67 (w)->wr.wr_hi = htonl(FW_WR_OP(FW_ULPTX_WR) | FW_WR_ATOMIC(atomic)); \ 68 (w)->wr.wr_mid = htonl(FW_WR_LEN16(DIV_ROUND_UP(wrlen, 16)) | \ 69 FW_WR_FLOWID(tid)); \ 70 (w)->wr.wr_lo = cpu_to_be64(0); \ 71} while (0) 72 73/* Special asynchronous notification message */ 74#define CXGB4_MSG_AN ((void *)1) 75 76struct serv_entry { 77 void *data; 78}; 79 80union aopen_entry { 81 void *data; 82 union aopen_entry *next; 83}; 84 85/* 86 * Holds the size, base address, free list start, etc of the TID, server TID, 87 * and active-open TID tables. The tables themselves are allocated dynamically. 88 */ 89struct tid_info { 90 void **tid_tab; 91 unsigned int ntids; 92 93 struct serv_entry *stid_tab; 94 unsigned long *stid_bmap; 95 unsigned int nstids; 96 unsigned int stid_base; 97 98 union aopen_entry *atid_tab; 99 unsigned int natids; 100 101 unsigned int nftids; 102 unsigned int ftid_base; 103 104 spinlock_t atid_lock ____cacheline_aligned_in_smp; 105 union aopen_entry *afree; 106 unsigned int atids_in_use; 107 108 spinlock_t stid_lock; 109 unsigned int stids_in_use; 110 111 atomic_t tids_in_use; 112}; 113 114static inline void *lookup_tid(const struct tid_info *t, unsigned int tid) 115{ 116 return tid < t->ntids ? t->tid_tab[tid] : NULL; 117} 118 119static inline void *lookup_atid(const struct tid_info *t, unsigned int atid) 120{ 121 return atid < t->natids ? t->atid_tab[atid].data : NULL; 122} 123 124static inline void *lookup_stid(const struct tid_info *t, unsigned int stid) 125{ 126 stid -= t->stid_base; 127 return stid < t->nstids ? t->stid_tab[stid].data : NULL; 128} 129 130static inline void cxgb4_insert_tid(struct tid_info *t, void *data, 131 unsigned int tid) 132{ 133 t->tid_tab[tid] = data; 134 atomic_inc(&t->tids_in_use); 135} 136 137int cxgb4_alloc_atid(struct tid_info *t, void *data); 138int cxgb4_alloc_stid(struct tid_info *t, int family, void *data); 139void cxgb4_free_atid(struct tid_info *t, unsigned int atid); 140void cxgb4_free_stid(struct tid_info *t, unsigned int stid, int family); 141void cxgb4_remove_tid(struct tid_info *t, unsigned int qid, unsigned int tid); 142 143struct in6_addr; 144 145int cxgb4_create_server(const struct net_device *dev, unsigned int stid, 146 __be32 sip, __be16 sport, unsigned int queue); 147 148static inline void set_wr_txq(struct sk_buff *skb, int prio, int queue) 149{ 150 skb_set_queue_mapping(skb, (queue << 1) | prio); 151} 152 153enum cxgb4_uld { 154 CXGB4_ULD_RDMA, 155 CXGB4_ULD_ISCSI, 156 CXGB4_ULD_MAX 157}; 158 159enum cxgb4_state { 160 CXGB4_STATE_UP, 161 CXGB4_STATE_START_RECOVERY, 162 CXGB4_STATE_DOWN, 163 CXGB4_STATE_DETACH 164}; 165 166struct pci_dev; 167struct l2t_data; 168struct net_device; 169struct pkt_gl; 170struct tp_tcp_stats; 171 172struct cxgb4_range { 173 unsigned int start; 174 unsigned int size; 175}; 176 177struct cxgb4_virt_res { /* virtualized HW resources */ 178 struct cxgb4_range ddp; 179 struct cxgb4_range iscsi; 180 struct cxgb4_range stag; 181 struct cxgb4_range rq; 182 struct cxgb4_range pbl; 183 struct cxgb4_range qp; 184 struct cxgb4_range cq; 185 struct cxgb4_range ocq; 186}; 187 188#define OCQ_WIN_OFFSET(pdev, vres) \ 189 (pci_resource_len((pdev), 2) - roundup_pow_of_two((vres)->ocq.size)) 190 191/* 192 * Block of information the LLD provides to ULDs attaching to a device. 193 */ 194struct cxgb4_lld_info { 195 struct pci_dev *pdev; /* associated PCI device */ 196 struct l2t_data *l2t; /* L2 table */ 197 struct tid_info *tids; /* TID table */ 198 struct net_device **ports; /* device ports */ 199 const struct cxgb4_virt_res *vr; /* assorted HW resources */ 200 const unsigned short *mtus; /* MTU table */ 201 const unsigned short *rxq_ids; /* the ULD's Rx queue ids */ 202 unsigned short nrxq; /* # of Rx queues */ 203 unsigned short ntxq; /* # of Tx queues */ 204 unsigned char nchan:4; /* # of channels */ 205 unsigned char nports:4; /* # of ports */ 206 unsigned char wr_cred; /* WR 16-byte credits */ 207 unsigned char adapter_type; /* type of adapter */ 208 unsigned char fw_api_ver; /* FW API version */ 209 unsigned int fw_vers; /* FW version */ 210 unsigned int iscsi_iolen; /* iSCSI max I/O length */ 211 unsigned short udb_density; /* # of user DB/page */ 212 unsigned short ucq_density; /* # of user CQs/page */ 213 void __iomem *gts_reg; /* address of GTS register */ 214 void __iomem *db_reg; /* address of kernel doorbell */ 215}; 216 217struct cxgb4_uld_info { 218 const char *name; 219 void *(*add)(const struct cxgb4_lld_info *p); 220 int (*rx_handler)(void *handle, const __be64 *rsp, 221 const struct pkt_gl *gl); 222 int (*state_change)(void *handle, enum cxgb4_state new_state); 223}; 224 225int cxgb4_register_uld(enum cxgb4_uld type, const struct cxgb4_uld_info *p); 226int cxgb4_unregister_uld(enum cxgb4_uld type); 227int cxgb4_ofld_send(struct net_device *dev, struct sk_buff *skb); 228unsigned int cxgb4_port_chan(const struct net_device *dev); 229unsigned int cxgb4_port_viid(const struct net_device *dev); 230unsigned int cxgb4_port_idx(const struct net_device *dev); 231unsigned int cxgb4_best_mtu(const unsigned short *mtus, unsigned short mtu, 232 unsigned int *idx); 233void cxgb4_get_tcp_stats(struct pci_dev *pdev, struct tp_tcp_stats *v4, 234 struct tp_tcp_stats *v6); 235void cxgb4_iscsi_init(struct net_device *dev, unsigned int tag_mask, 236 const unsigned int *pgsz_order); 237struct sk_buff *cxgb4_pktgl_to_skb(const struct pkt_gl *gl, 238 unsigned int skb_len, unsigned int pull_len); 239#endif /* !__CXGB4_OFLD_H */ 240