2 * This file is part of the Chelsio T4 Ethernet driver for Linux.
4 * Copyright (c) 2003-2010 Chelsio Communications, Inc. All rights reserved.
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:
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
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.
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
35 #ifndef __CXGB4_OFLD_H
36 #define __CXGB4_OFLD_H
38 #include <linux/cache.h>
39 #include <linux/spinlock.h>
40 #include <linux/skbuff.h>
41 #include <linux/atomic.h>
43 /* CPL message priority levels */
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 */
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)) | \
58 (w)->wr.wr_lo = cpu_to_be64(0); \
61 #define INIT_TP_WR_CPL(w, cpl, tid) do { \
63 OPCODE_TID(w) = htonl(MK_OPCODE_TID(cpl, tid)); \
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)) | \
70 (w)->wr.wr_lo = cpu_to_be64(0); \
73 /* Special asynchronous notification message */
74 #define CXGB4_MSG_AN ((void *)1)
82 union aopen_entry *next;
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.
93 struct serv_entry *stid_tab;
94 unsigned long *stid_bmap;
96 unsigned int stid_base;
98 union aopen_entry *atid_tab;
102 unsigned int ftid_base;
103 unsigned int aftid_base;
104 unsigned int aftid_end;
105 /* Server filter region */
106 unsigned int sftid_base;
107 unsigned int nsftids;
109 spinlock_t atid_lock ____cacheline_aligned_in_smp;
110 union aopen_entry *afree;
111 unsigned int atids_in_use;
113 spinlock_t stid_lock;
114 unsigned int stids_in_use;
116 atomic_t tids_in_use;
119 static inline void *lookup_tid(const struct tid_info *t, unsigned int tid)
121 return tid < t->ntids ? t->tid_tab[tid] : NULL;
124 static inline void *lookup_atid(const struct tid_info *t, unsigned int atid)
126 return atid < t->natids ? t->atid_tab[atid].data : NULL;
129 static inline void *lookup_stid(const struct tid_info *t, unsigned int stid)
131 stid -= t->stid_base;
132 return stid < t->nstids ? t->stid_tab[stid].data : NULL;
135 static inline void cxgb4_insert_tid(struct tid_info *t, void *data,
138 t->tid_tab[tid] = data;
139 atomic_inc(&t->tids_in_use);
142 int cxgb4_alloc_atid(struct tid_info *t, void *data);
143 int cxgb4_alloc_stid(struct tid_info *t, int family, void *data);
144 void cxgb4_free_atid(struct tid_info *t, unsigned int atid);
145 void cxgb4_free_stid(struct tid_info *t, unsigned int stid, int family);
146 void cxgb4_remove_tid(struct tid_info *t, unsigned int qid, unsigned int tid);
150 int cxgb4_create_server(const struct net_device *dev, unsigned int stid,
151 __be32 sip, __be16 sport, unsigned int queue);
153 static inline void set_wr_txq(struct sk_buff *skb, int prio, int queue)
155 skb_set_queue_mapping(skb, (queue << 1) | prio);
166 CXGB4_STATE_START_RECOVERY,
172 CXGB4_CONTROL_DB_FULL,
173 CXGB4_CONTROL_DB_EMPTY,
174 CXGB4_CONTROL_DB_DROP,
188 struct cxgb4_virt_res { /* virtualized HW resources */
189 struct cxgb4_range ddp;
190 struct cxgb4_range iscsi;
191 struct cxgb4_range stag;
192 struct cxgb4_range rq;
193 struct cxgb4_range pbl;
194 struct cxgb4_range qp;
195 struct cxgb4_range cq;
196 struct cxgb4_range ocq;
199 #define OCQ_WIN_OFFSET(pdev, vres) \
200 (pci_resource_len((pdev), 2) - roundup_pow_of_two((vres)->ocq.size))
203 * Block of information the LLD provides to ULDs attaching to a device.
205 struct cxgb4_lld_info {
206 struct pci_dev *pdev; /* associated PCI device */
207 struct l2t_data *l2t; /* L2 table */
208 struct tid_info *tids; /* TID table */
209 struct net_device **ports; /* device ports */
210 const struct cxgb4_virt_res *vr; /* assorted HW resources */
211 const unsigned short *mtus; /* MTU table */
212 const unsigned short *rxq_ids; /* the ULD's Rx queue ids */
213 unsigned short nrxq; /* # of Rx queues */
214 unsigned short ntxq; /* # of Tx queues */
215 unsigned char nchan:4; /* # of channels */
216 unsigned char nports:4; /* # of ports */
217 unsigned char wr_cred; /* WR 16-byte credits */
218 unsigned char adapter_type; /* type of adapter */
219 unsigned char fw_api_ver; /* FW API version */
220 unsigned int fw_vers; /* FW version */
221 unsigned int iscsi_iolen; /* iSCSI max I/O length */
222 unsigned short udb_density; /* # of user DB/page */
223 unsigned short ucq_density; /* # of user CQs/page */
224 void __iomem *gts_reg; /* address of GTS register */
225 void __iomem *db_reg; /* address of kernel doorbell */
226 int dbfifo_int_thresh; /* doorbell fifo int threshold */
229 struct cxgb4_uld_info {
231 void *(*add)(const struct cxgb4_lld_info *p);
232 int (*rx_handler)(void *handle, const __be64 *rsp,
233 const struct pkt_gl *gl);
234 int (*state_change)(void *handle, enum cxgb4_state new_state);
235 int (*control)(void *handle, enum cxgb4_control control, ...);
238 int cxgb4_register_uld(enum cxgb4_uld type, const struct cxgb4_uld_info *p);
239 int cxgb4_unregister_uld(enum cxgb4_uld type);
240 int cxgb4_ofld_send(struct net_device *dev, struct sk_buff *skb);
241 unsigned int cxgb4_dbfifo_count(const struct net_device *dev, int lpfifo);
242 unsigned int cxgb4_port_chan(const struct net_device *dev);
243 unsigned int cxgb4_port_viid(const struct net_device *dev);
244 unsigned int cxgb4_port_idx(const struct net_device *dev);
245 unsigned int cxgb4_best_mtu(const unsigned short *mtus, unsigned short mtu,
247 void cxgb4_get_tcp_stats(struct pci_dev *pdev, struct tp_tcp_stats *v4,
248 struct tp_tcp_stats *v6);
249 void cxgb4_iscsi_init(struct net_device *dev, unsigned int tag_mask,
250 const unsigned int *pgsz_order);
251 struct sk_buff *cxgb4_pktgl_to_skb(const struct pkt_gl *gl,
252 unsigned int skb_len, unsigned int pull_len);
253 int cxgb4_sync_txq_pidx(struct net_device *dev, u16 qid, u16 pidx, u16 size);
254 int cxgb4_flush_eq_cache(struct net_device *dev);
255 #endif /* !__CXGB4_OFLD_H */