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
lookup_tid(const struct tid_info * t,unsigned int tid)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
lookup_atid(const struct tid_info * t,unsigned int atid)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
lookup_stid(const struct tid_info * t,unsigned int stid)132 static inline void *lookup_stid(const struct tid_info *t, unsigned int stid)
133 {
134 stid -= t->stid_base;
135 return stid < (t->nstids + t->nsftids) ? t->stid_tab[stid].data : NULL;
136 }
137
cxgb4_insert_tid(struct tid_info * t,void * data,unsigned int tid)138 static inline void cxgb4_insert_tid(struct tid_info *t, void *data,
139 unsigned int tid)
140 {
141 t->tid_tab[tid] = data;
142 atomic_inc(&t->tids_in_use);
143 }
144
145 int cxgb4_alloc_atid(struct tid_info *t, void *data);
146 int cxgb4_alloc_stid(struct tid_info *t, int family, void *data);
147 int cxgb4_alloc_sftid(struct tid_info *t, int family, void *data);
148 void cxgb4_free_atid(struct tid_info *t, unsigned int atid);
149 void cxgb4_free_stid(struct tid_info *t, unsigned int stid, int family);
150 void cxgb4_remove_tid(struct tid_info *t, unsigned int qid, unsigned int tid);
151
152 struct in6_addr;
153
154 int cxgb4_create_server(const struct net_device *dev, unsigned int stid,
155 __be32 sip, __be16 sport, __be16 vlan,
156 unsigned int queue);
157 int cxgb4_create_server_filter(const struct net_device *dev, unsigned int stid,
158 __be32 sip, __be16 sport, __be16 vlan,
159 unsigned int queue,
160 unsigned char port, unsigned char mask);
161 int cxgb4_remove_server_filter(const struct net_device *dev, unsigned int stid,
162 unsigned int queue, bool ipv6);
set_wr_txq(struct sk_buff * skb,int prio,int queue)163 static inline void set_wr_txq(struct sk_buff *skb, int prio, int queue)
164 {
165 skb_set_queue_mapping(skb, (queue << 1) | prio);
166 }
167
168 enum cxgb4_uld {
169 CXGB4_ULD_RDMA,
170 CXGB4_ULD_ISCSI,
171 CXGB4_ULD_MAX
172 };
173
174 enum cxgb4_state {
175 CXGB4_STATE_UP,
176 CXGB4_STATE_START_RECOVERY,
177 CXGB4_STATE_DOWN,
178 CXGB4_STATE_DETACH
179 };
180
181 enum cxgb4_control {
182 CXGB4_CONTROL_DB_FULL,
183 CXGB4_CONTROL_DB_EMPTY,
184 CXGB4_CONTROL_DB_DROP,
185 };
186
187 struct pci_dev;
188 struct l2t_data;
189 struct net_device;
190 struct pkt_gl;
191 struct tp_tcp_stats;
192
193 struct cxgb4_range {
194 unsigned int start;
195 unsigned int size;
196 };
197
198 struct cxgb4_virt_res { /* virtualized HW resources */
199 struct cxgb4_range ddp;
200 struct cxgb4_range iscsi;
201 struct cxgb4_range stag;
202 struct cxgb4_range rq;
203 struct cxgb4_range pbl;
204 struct cxgb4_range qp;
205 struct cxgb4_range cq;
206 struct cxgb4_range ocq;
207 };
208
209 #define OCQ_WIN_OFFSET(pdev, vres) \
210 (pci_resource_len((pdev), 2) - roundup_pow_of_two((vres)->ocq.size))
211
212 /*
213 * Block of information the LLD provides to ULDs attaching to a device.
214 */
215 struct cxgb4_lld_info {
216 struct pci_dev *pdev; /* associated PCI device */
217 struct l2t_data *l2t; /* L2 table */
218 struct tid_info *tids; /* TID table */
219 struct net_device **ports; /* device ports */
220 const struct cxgb4_virt_res *vr; /* assorted HW resources */
221 const unsigned short *mtus; /* MTU table */
222 const unsigned short *rxq_ids; /* the ULD's Rx queue ids */
223 unsigned short nrxq; /* # of Rx queues */
224 unsigned short ntxq; /* # of Tx queues */
225 unsigned char nchan:4; /* # of channels */
226 unsigned char nports:4; /* # of ports */
227 unsigned char wr_cred; /* WR 16-byte credits */
228 unsigned char adapter_type; /* type of adapter */
229 unsigned char fw_api_ver; /* FW API version */
230 unsigned int fw_vers; /* FW version */
231 unsigned int iscsi_iolen; /* iSCSI max I/O length */
232 unsigned short udb_density; /* # of user DB/page */
233 unsigned short ucq_density; /* # of user CQs/page */
234 unsigned short filt_mode; /* filter optional components */
235 unsigned short tx_modq[NCHAN]; /* maps each tx channel to a */
236 /* scheduler queue */
237 void __iomem *gts_reg; /* address of GTS register */
238 void __iomem *db_reg; /* address of kernel doorbell */
239 int dbfifo_int_thresh; /* doorbell fifo int threshold */
240 unsigned int sge_pktshift; /* Padding between CPL and */
241 /* packet data */
242 bool enable_fw_ofld_conn; /* Enable connection through fw */
243 /* WR */
244 };
245
246 struct cxgb4_uld_info {
247 const char *name;
248 void *(*add)(const struct cxgb4_lld_info *p);
249 int (*rx_handler)(void *handle, const __be64 *rsp,
250 const struct pkt_gl *gl);
251 int (*state_change)(void *handle, enum cxgb4_state new_state);
252 int (*control)(void *handle, enum cxgb4_control control, ...);
253 };
254
255 int cxgb4_register_uld(enum cxgb4_uld type, const struct cxgb4_uld_info *p);
256 int cxgb4_unregister_uld(enum cxgb4_uld type);
257 int cxgb4_ofld_send(struct net_device *dev, struct sk_buff *skb);
258 unsigned int cxgb4_dbfifo_count(const struct net_device *dev, int lpfifo);
259 unsigned int cxgb4_port_chan(const struct net_device *dev);
260 unsigned int cxgb4_port_viid(const struct net_device *dev);
261 unsigned int cxgb4_port_idx(const struct net_device *dev);
262 unsigned int cxgb4_best_mtu(const unsigned short *mtus, unsigned short mtu,
263 unsigned int *idx);
264 void cxgb4_get_tcp_stats(struct pci_dev *pdev, struct tp_tcp_stats *v4,
265 struct tp_tcp_stats *v6);
266 void cxgb4_iscsi_init(struct net_device *dev, unsigned int tag_mask,
267 const unsigned int *pgsz_order);
268 struct sk_buff *cxgb4_pktgl_to_skb(const struct pkt_gl *gl,
269 unsigned int skb_len, unsigned int pull_len);
270 int cxgb4_sync_txq_pidx(struct net_device *dev, u16 qid, u16 pidx, u16 size);
271 int cxgb4_flush_eq_cache(struct net_device *dev);
272 void cxgb4_disable_db_coalescing(struct net_device *dev);
273 void cxgb4_enable_db_coalescing(struct net_device *dev);
274
275 #endif /* !__CXGB4_OFLD_H */
276