Merge branch 'for-linus' of git://neil.brown.name/md
[linux-2.6] / drivers / infiniband / hw / cxgb3 / iwch.c
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 #include <linux/module.h>
33 #include <linux/moduleparam.h>
34
35 #include <rdma/ib_verbs.h>
36
37 #include "cxgb3_offload.h"
38 #include "iwch_provider.h"
39 #include "iwch_user.h"
40 #include "iwch.h"
41 #include "iwch_cm.h"
42
43 #define DRV_VERSION "1.1"
44
45 MODULE_AUTHOR("Boyd Faulkner, Steve Wise");
46 MODULE_DESCRIPTION("Chelsio T3 RDMA Driver");
47 MODULE_LICENSE("Dual BSD/GPL");
48 MODULE_VERSION(DRV_VERSION);
49
50 cxgb3_cpl_handler_func t3c_handlers[NUM_CPL_CMDS];
51
52 static void open_rnic_dev(struct t3cdev *);
53 static void close_rnic_dev(struct t3cdev *);
54
55 struct cxgb3_client t3c_client = {
56         .name = "iw_cxgb3",
57         .add = open_rnic_dev,
58         .remove = close_rnic_dev,
59         .handlers = t3c_handlers,
60         .redirect = iwch_ep_redirect
61 };
62
63 static LIST_HEAD(dev_list);
64 static DEFINE_MUTEX(dev_mutex);
65
66 static void rnic_init(struct iwch_dev *rnicp)
67 {
68         PDBG("%s iwch_dev %p\n", __func__,  rnicp);
69         idr_init(&rnicp->cqidr);
70         idr_init(&rnicp->qpidr);
71         idr_init(&rnicp->mmidr);
72         spin_lock_init(&rnicp->lock);
73
74         rnicp->attr.max_qps = T3_MAX_NUM_QP - 32;
75         rnicp->attr.max_wrs = T3_MAX_QP_DEPTH;
76         rnicp->attr.max_sge_per_wr = T3_MAX_SGE;
77         rnicp->attr.max_sge_per_rdma_write_wr = T3_MAX_SGE;
78         rnicp->attr.max_cqs = T3_MAX_NUM_CQ - 1;
79         rnicp->attr.max_cqes_per_cq = T3_MAX_CQ_DEPTH;
80         rnicp->attr.max_mem_regs = cxio_num_stags(&rnicp->rdev);
81         rnicp->attr.max_phys_buf_entries = T3_MAX_PBL_SIZE;
82         rnicp->attr.max_pds = T3_MAX_NUM_PD - 1;
83         rnicp->attr.mem_pgsizes_bitmask = T3_PAGESIZE_MASK;
84         rnicp->attr.max_mr_size = T3_MAX_MR_SIZE;
85         rnicp->attr.can_resize_wq = 0;
86         rnicp->attr.max_rdma_reads_per_qp = 8;
87         rnicp->attr.max_rdma_read_resources =
88             rnicp->attr.max_rdma_reads_per_qp * rnicp->attr.max_qps;
89         rnicp->attr.max_rdma_read_qp_depth = 8; /* IRD */
90         rnicp->attr.max_rdma_read_depth =
91             rnicp->attr.max_rdma_read_qp_depth * rnicp->attr.max_qps;
92         rnicp->attr.rq_overflow_handled = 0;
93         rnicp->attr.can_modify_ird = 0;
94         rnicp->attr.can_modify_ord = 0;
95         rnicp->attr.max_mem_windows = rnicp->attr.max_mem_regs - 1;
96         rnicp->attr.stag0_value = 1;
97         rnicp->attr.zbva_support = 1;
98         rnicp->attr.local_invalidate_fence = 1;
99         rnicp->attr.cq_overflow_detection = 1;
100         return;
101 }
102
103 static void open_rnic_dev(struct t3cdev *tdev)
104 {
105         struct iwch_dev *rnicp;
106         static int vers_printed;
107
108         PDBG("%s t3cdev %p\n", __func__,  tdev);
109         if (!vers_printed++)
110                 printk(KERN_INFO MOD "Chelsio T3 RDMA Driver - version %s\n",
111                        DRV_VERSION);
112         rnicp = (struct iwch_dev *)ib_alloc_device(sizeof(*rnicp));
113         if (!rnicp) {
114                 printk(KERN_ERR MOD "Cannot allocate ib device\n");
115                 return;
116         }
117         rnicp->rdev.ulp = rnicp;
118         rnicp->rdev.t3cdev_p = tdev;
119
120         mutex_lock(&dev_mutex);
121
122         if (cxio_rdev_open(&rnicp->rdev)) {
123                 mutex_unlock(&dev_mutex);
124                 printk(KERN_ERR MOD "Unable to open CXIO rdev\n");
125                 ib_dealloc_device(&rnicp->ibdev);
126                 return;
127         }
128
129         rnic_init(rnicp);
130
131         list_add_tail(&rnicp->entry, &dev_list);
132         mutex_unlock(&dev_mutex);
133
134         if (iwch_register_device(rnicp)) {
135                 printk(KERN_ERR MOD "Unable to register device\n");
136                 close_rnic_dev(tdev);
137         }
138         printk(KERN_INFO MOD "Initialized device %s\n",
139                pci_name(rnicp->rdev.rnic_info.pdev));
140         return;
141 }
142
143 static void close_rnic_dev(struct t3cdev *tdev)
144 {
145         struct iwch_dev *dev, *tmp;
146         PDBG("%s t3cdev %p\n", __func__,  tdev);
147         mutex_lock(&dev_mutex);
148         list_for_each_entry_safe(dev, tmp, &dev_list, entry) {
149                 if (dev->rdev.t3cdev_p == tdev) {
150                         list_del(&dev->entry);
151                         iwch_unregister_device(dev);
152                         cxio_rdev_close(&dev->rdev);
153                         idr_destroy(&dev->cqidr);
154                         idr_destroy(&dev->qpidr);
155                         idr_destroy(&dev->mmidr);
156                         ib_dealloc_device(&dev->ibdev);
157                         break;
158                 }
159         }
160         mutex_unlock(&dev_mutex);
161 }
162
163 static int __init iwch_init_module(void)
164 {
165         int err;
166
167         err = cxio_hal_init();
168         if (err)
169                 return err;
170         err = iwch_cm_init();
171         if (err)
172                 return err;
173         cxio_register_ev_cb(iwch_ev_dispatch);
174         cxgb3_register_client(&t3c_client);
175         return 0;
176 }
177
178 static void __exit iwch_exit_module(void)
179 {
180         cxgb3_unregister_client(&t3c_client);
181         cxio_unregister_ev_cb(iwch_ev_dispatch);
182         iwch_cm_term();
183         cxio_hal_exit();
184 }
185
186 module_init(iwch_init_module);
187 module_exit(iwch_exit_module);