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
40 #include <rdma/ib_verbs.h>
41
42 #include "cxio_hal.h"
43 #include "cxgb3_offload.h"
44
45 struct iwch_pd;
46 struct iwch_cq;
47 struct iwch_qp;
48 struct iwch_mr;
49
50 struct iwch_rnic_attributes {
51 u32 max_qps;
52 u32 max_wrs; /* Max for any SQ/RQ */
53 u32 max_sge_per_wr;
54 u32 max_sge_per_rdma_write_wr; /* for RDMA Write WR */
55 u32 max_cqs;
56 u32 max_cqes_per_cq;
57 u32 max_mem_regs;
58 u32 max_phys_buf_entries; /* for phys buf list */
59 u32 max_pds;
60
61 /*
62 * The memory page sizes supported by this RNIC.
63 * Bit position i in bitmap indicates page of
64 * size (4k)^i. Phys block list mode unsupported.
65 */
66 u32 mem_pgsizes_bitmask;
67 u64 max_mr_size;
68 u8 can_resize_wq;
69
70 /*
71 * The maximum number of RDMA Reads that can be outstanding
72 * per QP with this RNIC as the target.
73 */
74 u32 max_rdma_reads_per_qp;
75
76 /*
77 * The maximum number of resources used for RDMA Reads
78 * by this RNIC with this RNIC as the target.
79 */
80 u32 max_rdma_read_resources;
81
82 /*
83 * The max depth per QP for initiation of RDMA Read
84 * by this RNIC.
85 */
86 u32 max_rdma_read_qp_depth;
87
88 /*
89 * The maximum depth for initiation of RDMA Read
90 * operations by this RNIC on all QPs
91 */
92 u32 max_rdma_read_depth;
93 u8 rq_overflow_handled;
94 u32 can_modify_ird;
95 u32 can_modify_ord;
96 u32 max_mem_windows;
97 u32 stag0_value;
98 u8 zbva_support;
99 u8 local_invalidate_fence;
100 u32 cq_overflow_detection;
101 };
102
103 struct iwch_dev {
104 struct ib_device ibdev;
105 struct cxio_rdev rdev;
106 u32 device_cap_flags;
107 struct iwch_rnic_attributes attr;
108 struct idr cqidr;
109 struct idr qpidr;
110 struct idr mmidr;
111 spinlock_t lock;
112 struct list_head entry;
113 };
114
to_iwch_dev(struct ib_device * ibdev)115 static inline struct iwch_dev *to_iwch_dev(struct ib_device *ibdev)
116 {
117 return container_of(ibdev, struct iwch_dev, ibdev);
118 }
119
t3b_device(const struct iwch_dev * rhp)120 static inline int t3b_device(const struct iwch_dev *rhp)
121 {
122 return rhp->rdev.t3cdev_p->type == T3B;
123 }
124
t3a_device(const struct iwch_dev * rhp)125 static inline int t3a_device(const struct iwch_dev *rhp)
126 {
127 return rhp->rdev.t3cdev_p->type == T3A;
128 }
129
get_chp(struct iwch_dev * rhp,u32 cqid)130 static inline struct iwch_cq *get_chp(struct iwch_dev *rhp, u32 cqid)
131 {
132 return idr_find(&rhp->cqidr, cqid);
133 }
134
get_qhp(struct iwch_dev * rhp,u32 qpid)135 static inline struct iwch_qp *get_qhp(struct iwch_dev *rhp, u32 qpid)
136 {
137 return idr_find(&rhp->qpidr, qpid);
138 }
139
get_mhp(struct iwch_dev * rhp,u32 mmid)140 static inline struct iwch_mr *get_mhp(struct iwch_dev *rhp, u32 mmid)
141 {
142 return idr_find(&rhp->mmidr, mmid);
143 }
144
insert_handle(struct iwch_dev * rhp,struct idr * idr,void * handle,u32 id)145 static inline int insert_handle(struct iwch_dev *rhp, struct idr *idr,
146 void *handle, u32 id)
147 {
148 int ret;
149 int newid;
150
151 do {
152 if (!idr_pre_get(idr, GFP_KERNEL)) {
153 return -ENOMEM;
154 }
155 spin_lock_irq(&rhp->lock);
156 ret = idr_get_new_above(idr, handle, id, &newid);
157 BUG_ON(newid != id);
158 spin_unlock_irq(&rhp->lock);
159 } while (ret == -EAGAIN);
160
161 return ret;
162 }
163
remove_handle(struct iwch_dev * rhp,struct idr * idr,u32 id)164 static inline void remove_handle(struct iwch_dev *rhp, struct idr *idr, u32 id)
165 {
166 spin_lock_irq(&rhp->lock);
167 idr_remove(idr, id);
168 spin_unlock_irq(&rhp->lock);
169 }
170
171 extern struct cxgb3_client t3c_client;
172 extern cxgb3_cpl_handler_func t3c_handlers[NUM_CPL_CMDS];
173 extern void iwch_ev_dispatch(struct cxio_rdev *rdev_p, struct sk_buff *skb);
174
175 #endif
176