Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
iwch.h
Go to the documentation of this file.
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_H__
33 #define __IWCH_H__
34 
35 #include <linux/mutex.h>
36 #include <linux/list.h>
37 #include <linux/spinlock.h>
38 #include <linux/idr.h>
39 #include <linux/workqueue.h>
40 
41 #include <rdma/ib_verbs.h>
42 
43 #include "cxio_hal.h"
44 #include "cxgb3_offload.h"
45 
46 struct iwch_pd;
47 struct iwch_cq;
48 struct iwch_qp;
49 struct iwch_mr;
50 
53  u32 max_wrs; /* Max for any SQ/RQ */
55  u32 max_sge_per_rdma_write_wr; /* for RDMA Write WR */
59  u32 max_phys_buf_entries; /* for phys buf list */
61 
62  /*
63  * The memory page sizes supported by this RNIC.
64  * Bit position i in bitmap indicates page of
65  * size (4k)^i. Phys block list mode unsupported.
66  */
70 
71  /*
72  * The maximum number of RDMA Reads that can be outstanding
73  * per QP with this RNIC as the target.
74  */
76 
77  /*
78  * The maximum number of resources used for RDMA Reads
79  * by this RNIC with this RNIC as the target.
80  */
82 
83  /*
84  * The max depth per QP for initiation of RDMA Read
85  * by this RNIC.
86  */
88 
89  /*
90  * The maximum depth for initiation of RDMA Read
91  * operations by this RNIC on all QPs
92  */
102 };
103 
104 struct iwch_dev {
105  struct ib_device ibdev;
106  struct cxio_rdev rdev;
109  struct idr cqidr;
110  struct idr qpidr;
111  struct idr mmidr;
113  struct list_head entry;
115 };
116 
117 static inline struct iwch_dev *to_iwch_dev(struct ib_device *ibdev)
118 {
119  return container_of(ibdev, struct iwch_dev, ibdev);
120 }
121 
122 static inline struct iwch_dev *rdev_to_iwch_dev(struct cxio_rdev *rdev)
123 {
124  return container_of(rdev, struct iwch_dev, rdev);
125 }
126 
127 static inline int t3b_device(const struct iwch_dev *rhp)
128 {
129  return rhp->rdev.t3cdev_p->type == T3B;
130 }
131 
132 static inline int t3a_device(const struct iwch_dev *rhp)
133 {
134  return rhp->rdev.t3cdev_p->type == T3A;
135 }
136 
137 static inline struct iwch_cq *get_chp(struct iwch_dev *rhp, u32 cqid)
138 {
139  return idr_find(&rhp->cqidr, cqid);
140 }
141 
142 static inline struct iwch_qp *get_qhp(struct iwch_dev *rhp, u32 qpid)
143 {
144  return idr_find(&rhp->qpidr, qpid);
145 }
146 
147 static inline struct iwch_mr *get_mhp(struct iwch_dev *rhp, u32 mmid)
148 {
149  return idr_find(&rhp->mmidr, mmid);
150 }
151 
152 static inline int insert_handle(struct iwch_dev *rhp, struct idr *idr,
153  void *handle, u32 id)
154 {
155  int ret;
156  int newid;
157 
158  do {
159  if (!idr_pre_get(idr, GFP_KERNEL)) {
160  return -ENOMEM;
161  }
162  spin_lock_irq(&rhp->lock);
163  ret = idr_get_new_above(idr, handle, id, &newid);
164  BUG_ON(newid != id);
165  spin_unlock_irq(&rhp->lock);
166  } while (ret == -EAGAIN);
167 
168  return ret;
169 }
170 
171 static inline void remove_handle(struct iwch_dev *rhp, struct idr *idr, u32 id)
172 {
173  spin_lock_irq(&rhp->lock);
174  idr_remove(idr, id);
175  spin_unlock_irq(&rhp->lock);
176 }
177 
178 extern struct cxgb3_client t3c_client;
180 extern void iwch_ev_dispatch(struct cxio_rdev *rdev_p, struct sk_buff *skb);
181 
182 #endif