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 */
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 /* Is it a server filter TID? */
135 if (t->nsftids && (stid >= t->sftid_base)) {
136 stid -= t->sftid_base;
137 stid += t->nstids;
138 } else {
139 stid -= t->stid_base;
140 }
141
142 return stid < (t->nstids + t->nsftids) ? t->stid_tab[stid].data : NULL;
143 }
144
cxgb4_insert_tid(struct tid_info * t,void * data,unsigned int tid)145 static inline void cxgb4_insert_tid(struct tid_info *t, void *data,
146 unsigned int tid)
147 {
148 t->tid_tab[tid] = data;
149 atomic_inc(&t->tids_in_use);
150 }
151
152 int cxgb4_alloc_atid(struct tid_info *t, void *data);
153 int cxgb4_alloc_stid(struct tid_info *t, int family, void *data);
154 int cxgb4_alloc_sftid(struct tid_info *t, int family, void *data);
155 void cxgb4_free_atid(struct tid_info *t, unsigned int atid);
156 void cxgb4_free_stid(struct tid_info *t, unsigned int stid, int family);
157 void cxgb4_remove_tid(struct tid_info *t, unsigned int qid, unsigned int tid);
158
159 struct in6_addr;
160
161 int cxgb4_create_server(const struct net_device *dev, unsigned int stid,
162 __be32 sip, __be16 sport, __be16 vlan,
163 unsigned int queue);
164 int cxgb4_create_server6(const struct net_device *dev, unsigned int stid,
165 const struct in6_addr *sip, __be16 sport,
166 unsigned int queue);
167 int cxgb4_remove_server(const struct net_device *dev, unsigned int stid,
168 unsigned int queue, bool ipv6);
169 int cxgb4_create_server_filter(const struct net_device *dev, unsigned int stid,
170 __be32 sip, __be16 sport, __be16 vlan,
171 unsigned int queue,
172 unsigned char port, unsigned char mask);
173 int cxgb4_remove_server_filter(const struct net_device *dev, unsigned int stid,
174 unsigned int queue, bool ipv6);
175 int cxgb4_clip_get(const struct net_device *dev, const struct in6_addr *lip);
176 int cxgb4_clip_release(const struct net_device *dev,
177 const struct in6_addr *lip);
178
set_wr_txq(struct sk_buff * skb,int prio,int queue)179 static inline void set_wr_txq(struct sk_buff *skb, int prio, int queue)
180 {
181 skb_set_queue_mapping(skb, (queue << 1) | prio);
182 }
183
184 enum cxgb4_uld {
185 CXGB4_ULD_RDMA,
186 CXGB4_ULD_ISCSI,
187 CXGB4_ULD_MAX
188 };
189
190 enum cxgb4_state {
191 CXGB4_STATE_UP,
192 CXGB4_STATE_START_RECOVERY,
193 CXGB4_STATE_DOWN,
194 CXGB4_STATE_DETACH
195 };
196
197 enum cxgb4_control {
198 CXGB4_CONTROL_DB_FULL,
199 CXGB4_CONTROL_DB_EMPTY,
200 CXGB4_CONTROL_DB_DROP,
201 };
202
203 struct pci_dev;
204 struct l2t_data;
205 struct net_device;
206 struct pkt_gl;
207 struct tp_tcp_stats;
208
209 struct cxgb4_range {
210 unsigned int start;
211 unsigned int size;
212 };
213
214 struct cxgb4_virt_res { /* virtualized HW resources */
215 struct cxgb4_range ddp;
216 struct cxgb4_range iscsi;
217 struct cxgb4_range stag;
218 struct cxgb4_range rq;
219 struct cxgb4_range pbl;
220 struct cxgb4_range qp;
221 struct cxgb4_range cq;
222 struct cxgb4_range ocq;
223 };
224
225 #define OCQ_WIN_OFFSET(pdev, vres) \
226 (pci_resource_len((pdev), 2) - roundup_pow_of_two((vres)->ocq.size))
227
228 /*
229 * Block of information the LLD provides to ULDs attaching to a device.
230 */
231 struct cxgb4_lld_info {
232 struct pci_dev *pdev; /* associated PCI device */
233 struct l2t_data *l2t; /* L2 table */
234 struct tid_info *tids; /* TID table */
235 struct net_device **ports; /* device ports */
236 const struct cxgb4_virt_res *vr; /* assorted HW resources */
237 const unsigned short *mtus; /* MTU table */
238 const unsigned short *rxq_ids; /* the ULD's Rx queue ids */
239 const unsigned short *ciq_ids; /* the ULD's concentrator IQ ids */
240 unsigned short nrxq; /* # of Rx queues */
241 unsigned short ntxq; /* # of Tx queues */
242 unsigned short nciq; /* # of concentrator IQ */
243 unsigned char nchan:4; /* # of channels */
244 unsigned char nports:4; /* # of ports */
245 unsigned char wr_cred; /* WR 16-byte credits */
246 unsigned char adapter_type; /* type of adapter */
247 unsigned char fw_api_ver; /* FW API version */
248 unsigned int fw_vers; /* FW version */
249 unsigned int iscsi_iolen; /* iSCSI max I/O length */
250 unsigned int cclk_ps; /* Core clock period in psec */
251 unsigned short udb_density; /* # of user DB/page */
252 unsigned short ucq_density; /* # of user CQs/page */
253 unsigned short filt_mode; /* filter optional components */
254 unsigned short tx_modq[NCHAN]; /* maps each tx channel to a */
255 /* scheduler queue */
256 void __iomem *gts_reg; /* address of GTS register */
257 void __iomem *db_reg; /* address of kernel doorbell */
258 int dbfifo_int_thresh; /* doorbell fifo int threshold */
259 unsigned int sge_ingpadboundary; /* SGE ingress padding boundary */
260 unsigned int sge_egrstatuspagesize; /* SGE egress status page size */
261 unsigned int sge_pktshift; /* Padding between CPL and */
262 /* packet data */
263 unsigned int pf; /* Physical Function we're using */
264 bool enable_fw_ofld_conn; /* Enable connection through fw */
265 /* WR */
266 unsigned int max_ordird_qp; /* Max ORD/IRD depth per RDMA QP */
267 unsigned int max_ird_adapter; /* Max IRD memory per adapter */
268 bool ulptx_memwrite_dsgl; /* use of T5 DSGL allowed */
269 };
270
271 struct cxgb4_uld_info {
272 const char *name;
273 void *(*add)(const struct cxgb4_lld_info *p);
274 int (*rx_handler)(void *handle, const __be64 *rsp,
275 const struct pkt_gl *gl);
276 int (*state_change)(void *handle, enum cxgb4_state new_state);
277 int (*control)(void *handle, enum cxgb4_control control, ...);
278 };
279
280 int cxgb4_register_uld(enum cxgb4_uld type, const struct cxgb4_uld_info *p);
281 int cxgb4_unregister_uld(enum cxgb4_uld type);
282 int cxgb4_ofld_send(struct net_device *dev, struct sk_buff *skb);
283 unsigned int cxgb4_dbfifo_count(const struct net_device *dev, int lpfifo);
284 unsigned int cxgb4_port_chan(const struct net_device *dev);
285 unsigned int cxgb4_port_viid(const struct net_device *dev);
286 unsigned int cxgb4_port_idx(const struct net_device *dev);
287 unsigned int cxgb4_best_mtu(const unsigned short *mtus, unsigned short mtu,
288 unsigned int *idx);
289 unsigned int cxgb4_best_aligned_mtu(const unsigned short *mtus,
290 unsigned short header_size,
291 unsigned short data_size_max,
292 unsigned short data_size_align,
293 unsigned int *mtu_idxp);
294 void cxgb4_get_tcp_stats(struct pci_dev *pdev, struct tp_tcp_stats *v4,
295 struct tp_tcp_stats *v6);
296 void cxgb4_iscsi_init(struct net_device *dev, unsigned int tag_mask,
297 const unsigned int *pgsz_order);
298 struct sk_buff *cxgb4_pktgl_to_skb(const struct pkt_gl *gl,
299 unsigned int skb_len, unsigned int pull_len);
300 int cxgb4_sync_txq_pidx(struct net_device *dev, u16 qid, u16 pidx, u16 size);
301 int cxgb4_flush_eq_cache(struct net_device *dev);
302 void cxgb4_disable_db_coalescing(struct net_device *dev);
303 void cxgb4_enable_db_coalescing(struct net_device *dev);
304 int cxgb4_read_tpte(struct net_device *dev, u32 stag, __be32 *tpte);
305 u64 cxgb4_read_sge_timestamp(struct net_device *dev);
306
307 #endif /* !__CXGB4_OFLD_H */
308