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 */
44 enum {
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
76 struct serv_entry {
77 void *data;
78 };
79
80 union 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 */
89 struct 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
lookup_tid(const struct tid_info * t,unsigned int tid)114 static 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
lookup_atid(const struct tid_info * t,unsigned int atid)119 static 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
lookup_stid(const struct tid_info * t,unsigned int stid)124 static 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
cxgb4_insert_tid(struct tid_info * t,void * data,unsigned int tid)130 static 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
137 int cxgb4_alloc_atid(struct tid_info *t, void *data);
138 int cxgb4_alloc_stid(struct tid_info *t, int family, void *data);
139 void cxgb4_free_atid(struct tid_info *t, unsigned int atid);
140 void cxgb4_free_stid(struct tid_info *t, unsigned int stid, int family);
141 void cxgb4_remove_tid(struct tid_info *t, unsigned int qid, unsigned int tid);
142
143 struct in6_addr;
144
145 int cxgb4_create_server(const struct net_device *dev, unsigned int stid,
146 __be32 sip, __be16 sport, unsigned int queue);
147
set_wr_txq(struct sk_buff * skb,int prio,int queue)148 static 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
153 enum cxgb4_uld {
154 CXGB4_ULD_RDMA,
155 CXGB4_ULD_ISCSI,
156 CXGB4_ULD_MAX
157 };
158
159 enum cxgb4_state {
160 CXGB4_STATE_UP,
161 CXGB4_STATE_START_RECOVERY,
162 CXGB4_STATE_DOWN,
163 CXGB4_STATE_DETACH
164 };
165
166 struct pci_dev;
167 struct l2t_data;
168 struct net_device;
169 struct pkt_gl;
170 struct tp_tcp_stats;
171
172 struct cxgb4_range {
173 unsigned int start;
174 unsigned int size;
175 };
176
177 struct 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 */
194 struct 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
217 struct 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
225 int cxgb4_register_uld(enum cxgb4_uld type, const struct cxgb4_uld_info *p);
226 int cxgb4_unregister_uld(enum cxgb4_uld type);
227 int cxgb4_ofld_send(struct net_device *dev, struct sk_buff *skb);
228 unsigned int cxgb4_port_chan(const struct net_device *dev);
229 unsigned int cxgb4_port_viid(const struct net_device *dev);
230 unsigned int cxgb4_port_idx(const struct net_device *dev);
231 unsigned int cxgb4_best_mtu(const unsigned short *mtus, unsigned short mtu,
232 unsigned int *idx);
233 void cxgb4_get_tcp_stats(struct pci_dev *pdev, struct tp_tcp_stats *v4,
234 struct tp_tcp_stats *v6);
235 void cxgb4_iscsi_init(struct net_device *dev, unsigned int tag_mask,
236 const unsigned int *pgsz_order);
237 struct 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