1 /*
2 * Copyright (c) 2006 Chelsio, Inc. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 */
32 #ifndef __IWCH_PROVIDER_H__
33 #define __IWCH_PROVIDER_H__
34
35 #include <linux/list.h>
36 #include <linux/spinlock.h>
37 #include <rdma/ib_verbs.h>
38 #include <asm/types.h>
39 #include "t3cdev.h"
40 #include "iwch.h"
41 #include "cxio_wr.h"
42 #include "cxio_hal.h"
43
44 struct iwch_pd {
45 struct ib_pd ibpd;
46 u32 pdid;
47 struct iwch_dev *rhp;
48 };
49
to_iwch_pd(struct ib_pd * ibpd)50 static inline struct iwch_pd *to_iwch_pd(struct ib_pd *ibpd)
51 {
52 return container_of(ibpd, struct iwch_pd, ibpd);
53 }
54
55 struct tpt_attributes {
56 u32 stag;
57 u32 state:1;
58 u32 type:2;
59 u32 rsvd:1;
60 enum tpt_mem_perm perms;
61 u32 remote_invaliate_disable:1;
62 u32 zbva:1;
63 u32 mw_bind_enable:1;
64 u32 page_size:5;
65
66 u32 pdid;
67 u32 qpid;
68 u32 pbl_addr;
69 u32 len;
70 u64 va_fbo;
71 u32 pbl_size;
72 };
73
74 struct iwch_mr {
75 struct ib_mr ibmr;
76 struct ib_umem *umem;
77 struct iwch_dev *rhp;
78 u64 kva;
79 struct tpt_attributes attr;
80 u64 *pages;
81 u32 npages;
82 };
83
84 typedef struct iwch_mw iwch_mw_handle;
85
to_iwch_mr(struct ib_mr * ibmr)86 static inline struct iwch_mr *to_iwch_mr(struct ib_mr *ibmr)
87 {
88 return container_of(ibmr, struct iwch_mr, ibmr);
89 }
90
91 struct iwch_mw {
92 struct ib_mw ibmw;
93 struct iwch_dev *rhp;
94 u64 kva;
95 struct tpt_attributes attr;
96 };
97
to_iwch_mw(struct ib_mw * ibmw)98 static inline struct iwch_mw *to_iwch_mw(struct ib_mw *ibmw)
99 {
100 return container_of(ibmw, struct iwch_mw, ibmw);
101 }
102
103 struct iwch_cq {
104 struct ib_cq ibcq;
105 struct iwch_dev *rhp;
106 struct t3_cq cq;
107 spinlock_t lock;
108 spinlock_t comp_handler_lock;
109 atomic_t refcnt;
110 wait_queue_head_t wait;
111 u32 __user *user_rptr_addr;
112 };
113
to_iwch_cq(struct ib_cq * ibcq)114 static inline struct iwch_cq *to_iwch_cq(struct ib_cq *ibcq)
115 {
116 return container_of(ibcq, struct iwch_cq, ibcq);
117 }
118
119 enum IWCH_QP_FLAGS {
120 QP_QUIESCED = 0x01
121 };
122
123 struct iwch_mpa_attributes {
124 u8 initiator;
125 u8 recv_marker_enabled;
126 u8 xmit_marker_enabled; /* iWARP: enable inbound Read Resp. */
127 u8 crc_enabled;
128 u8 version; /* 0 or 1 */
129 };
130
131 struct iwch_qp_attributes {
132 u32 scq;
133 u32 rcq;
134 u32 sq_num_entries;
135 u32 rq_num_entries;
136 u32 sq_max_sges;
137 u32 sq_max_sges_rdma_write;
138 u32 rq_max_sges;
139 u32 state;
140 u8 enable_rdma_read;
141 u8 enable_rdma_write; /* enable inbound Read Resp. */
142 u8 enable_bind;
143 u8 enable_mmid0_fastreg; /* Enable STAG0 + Fast-register */
144 /*
145 * Next QP state. If specify the current state, only the
146 * QP attributes will be modified.
147 */
148 u32 max_ord;
149 u32 max_ird;
150 u32 pd; /* IN */
151 u32 next_state;
152 char terminate_buffer[52];
153 u32 terminate_msg_len;
154 u8 is_terminate_local;
155 struct iwch_mpa_attributes mpa_attr; /* IN-OUT */
156 struct iwch_ep *llp_stream_handle;
157 char *stream_msg_buf; /* Last stream msg. before Idle -> RTS */
158 u32 stream_msg_buf_len; /* Only on Idle -> RTS */
159 };
160
161 struct iwch_qp {
162 struct ib_qp ibqp;
163 struct iwch_dev *rhp;
164 struct iwch_ep *ep;
165 struct iwch_qp_attributes attr;
166 struct t3_wq wq;
167 spinlock_t lock;
168 atomic_t refcnt;
169 wait_queue_head_t wait;
170 enum IWCH_QP_FLAGS flags;
171 struct timer_list timer;
172 };
173
qp_quiesced(struct iwch_qp * qhp)174 static inline int qp_quiesced(struct iwch_qp *qhp)
175 {
176 return qhp->flags & QP_QUIESCED;
177 }
178
to_iwch_qp(struct ib_qp * ibqp)179 static inline struct iwch_qp *to_iwch_qp(struct ib_qp *ibqp)
180 {
181 return container_of(ibqp, struct iwch_qp, ibqp);
182 }
183
184 void iwch_qp_add_ref(struct ib_qp *qp);
185 void iwch_qp_rem_ref(struct ib_qp *qp);
186
187 struct iwch_ucontext {
188 struct ib_ucontext ibucontext;
189 struct cxio_ucontext uctx;
190 u32 key;
191 spinlock_t mmap_lock;
192 struct list_head mmaps;
193 };
194
to_iwch_ucontext(struct ib_ucontext * c)195 static inline struct iwch_ucontext *to_iwch_ucontext(struct ib_ucontext *c)
196 {
197 return container_of(c, struct iwch_ucontext, ibucontext);
198 }
199
200 struct iwch_mm_entry {
201 struct list_head entry;
202 u64 addr;
203 u32 key;
204 unsigned len;
205 };
206
remove_mmap(struct iwch_ucontext * ucontext,u32 key,unsigned len)207 static inline struct iwch_mm_entry *remove_mmap(struct iwch_ucontext *ucontext,
208 u32 key, unsigned len)
209 {
210 struct list_head *pos, *nxt;
211 struct iwch_mm_entry *mm;
212
213 spin_lock(&ucontext->mmap_lock);
214 list_for_each_safe(pos, nxt, &ucontext->mmaps) {
215
216 mm = list_entry(pos, struct iwch_mm_entry, entry);
217 if (mm->key == key && mm->len == len) {
218 list_del_init(&mm->entry);
219 spin_unlock(&ucontext->mmap_lock);
220 PDBG("%s key 0x%x addr 0x%llx len %d\n", __func__,
221 key, (unsigned long long) mm->addr, mm->len);
222 return mm;
223 }
224 }
225 spin_unlock(&ucontext->mmap_lock);
226 return NULL;
227 }
228
insert_mmap(struct iwch_ucontext * ucontext,struct iwch_mm_entry * mm)229 static inline void insert_mmap(struct iwch_ucontext *ucontext,
230 struct iwch_mm_entry *mm)
231 {
232 spin_lock(&ucontext->mmap_lock);
233 PDBG("%s key 0x%x addr 0x%llx len %d\n", __func__,
234 mm->key, (unsigned long long) mm->addr, mm->len);
235 list_add_tail(&mm->entry, &ucontext->mmaps);
236 spin_unlock(&ucontext->mmap_lock);
237 }
238
239 enum iwch_qp_attr_mask {
240 IWCH_QP_ATTR_NEXT_STATE = 1 << 0,
241 IWCH_QP_ATTR_ENABLE_RDMA_READ = 1 << 7,
242 IWCH_QP_ATTR_ENABLE_RDMA_WRITE = 1 << 8,
243 IWCH_QP_ATTR_ENABLE_RDMA_BIND = 1 << 9,
244 IWCH_QP_ATTR_MAX_ORD = 1 << 11,
245 IWCH_QP_ATTR_MAX_IRD = 1 << 12,
246 IWCH_QP_ATTR_LLP_STREAM_HANDLE = 1 << 22,
247 IWCH_QP_ATTR_STREAM_MSG_BUFFER = 1 << 23,
248 IWCH_QP_ATTR_MPA_ATTR = 1 << 24,
249 IWCH_QP_ATTR_QP_CONTEXT_ACTIVATE = 1 << 25,
250 IWCH_QP_ATTR_VALID_MODIFY = (IWCH_QP_ATTR_ENABLE_RDMA_READ |
251 IWCH_QP_ATTR_ENABLE_RDMA_WRITE |
252 IWCH_QP_ATTR_MAX_ORD |
253 IWCH_QP_ATTR_MAX_IRD |
254 IWCH_QP_ATTR_LLP_STREAM_HANDLE |
255 IWCH_QP_ATTR_STREAM_MSG_BUFFER |
256 IWCH_QP_ATTR_MPA_ATTR |
257 IWCH_QP_ATTR_QP_CONTEXT_ACTIVATE)
258 };
259
260 int iwch_modify_qp(struct iwch_dev *rhp,
261 struct iwch_qp *qhp,
262 enum iwch_qp_attr_mask mask,
263 struct iwch_qp_attributes *attrs,
264 int internal);
265
266 enum iwch_qp_state {
267 IWCH_QP_STATE_IDLE,
268 IWCH_QP_STATE_RTS,
269 IWCH_QP_STATE_ERROR,
270 IWCH_QP_STATE_TERMINATE,
271 IWCH_QP_STATE_CLOSING,
272 IWCH_QP_STATE_TOT
273 };
274
iwch_convert_state(enum ib_qp_state ib_state)275 static inline int iwch_convert_state(enum ib_qp_state ib_state)
276 {
277 switch (ib_state) {
278 case IB_QPS_RESET:
279 case IB_QPS_INIT:
280 return IWCH_QP_STATE_IDLE;
281 case IB_QPS_RTS:
282 return IWCH_QP_STATE_RTS;
283 case IB_QPS_SQD:
284 return IWCH_QP_STATE_CLOSING;
285 case IB_QPS_SQE:
286 return IWCH_QP_STATE_TERMINATE;
287 case IB_QPS_ERR:
288 return IWCH_QP_STATE_ERROR;
289 default:
290 return -1;
291 }
292 }
293
iwch_ib_to_tpt_access(int acc)294 static inline u32 iwch_ib_to_tpt_access(int acc)
295 {
296 return (acc & IB_ACCESS_REMOTE_WRITE ? TPT_REMOTE_WRITE : 0) |
297 (acc & IB_ACCESS_REMOTE_READ ? TPT_REMOTE_READ : 0) |
298 (acc & IB_ACCESS_LOCAL_WRITE ? TPT_LOCAL_WRITE : 0) |
299 (acc & IB_ACCESS_MW_BIND ? TPT_MW_BIND : 0) |
300 TPT_LOCAL_READ;
301 }
302
iwch_ib_to_tpt_bind_access(int acc)303 static inline u32 iwch_ib_to_tpt_bind_access(int acc)
304 {
305 return (acc & IB_ACCESS_REMOTE_WRITE ? TPT_REMOTE_WRITE : 0) |
306 (acc & IB_ACCESS_REMOTE_READ ? TPT_REMOTE_READ : 0);
307 }
308
309 enum iwch_mmid_state {
310 IWCH_STAG_STATE_VALID,
311 IWCH_STAG_STATE_INVALID
312 };
313
314 enum iwch_qp_query_flags {
315 IWCH_QP_QUERY_CONTEXT_NONE = 0x0, /* No ctx; Only attrs */
316 IWCH_QP_QUERY_CONTEXT_GET = 0x1, /* Get ctx + attrs */
317 IWCH_QP_QUERY_CONTEXT_SUSPEND = 0x2, /* Not Supported */
318
319 /*
320 * Quiesce QP context; Consumer
321 * will NOT replay outstanding WR
322 */
323 IWCH_QP_QUERY_CONTEXT_QUIESCE = 0x4,
324 IWCH_QP_QUERY_CONTEXT_REMOVE = 0x8,
325 IWCH_QP_QUERY_TEST_USERWRITE = 0x32 /* Test special */
326 };
327
328 u16 iwch_rqes_posted(struct iwch_qp *qhp);
329 int iwch_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
330 struct ib_send_wr **bad_wr);
331 int iwch_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr,
332 struct ib_recv_wr **bad_wr);
333 int iwch_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc);
334 int iwch_post_terminate(struct iwch_qp *qhp, struct respQ_msg_t *rsp_msg);
335 int iwch_post_zb_read(struct iwch_ep *ep);
336 int iwch_register_device(struct iwch_dev *dev);
337 void iwch_unregister_device(struct iwch_dev *dev);
338 void stop_read_rep_timer(struct iwch_qp *qhp);
339 int iwch_register_mem(struct iwch_dev *rhp, struct iwch_pd *php,
340 struct iwch_mr *mhp, int shift);
341 int iwch_alloc_pbl(struct iwch_mr *mhp, int npages);
342 void iwch_free_pbl(struct iwch_mr *mhp);
343 int iwch_write_pbl(struct iwch_mr *mhp, __be64 *pages, int npages, int offset);
344
345 #define IWCH_NODE_DESC "cxgb3 Chelsio Communications"
346
347 #endif
348