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", __FUNCTION__, 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.vendor_id = 0x168;
75 rnicp->attr.vendor_part_id = 7;
76 rnicp->attr.max_qps = T3_MAX_NUM_QP - 32;
77 rnicp->attr.max_wrs = (1UL << 24) - 1;
78 rnicp->attr.max_sge_per_wr = T3_MAX_SGE;
79 rnicp->attr.max_sge_per_rdma_write_wr = T3_MAX_SGE;
80 rnicp->attr.max_cqs = T3_MAX_NUM_CQ - 1;
81 rnicp->attr.max_cqes_per_cq = (1UL << 24) - 1;
82 rnicp->attr.max_mem_regs = cxio_num_stags(&rnicp->rdev);
83 rnicp->attr.max_phys_buf_entries = T3_MAX_PBL_SIZE;
84 rnicp->attr.max_pds = T3_MAX_NUM_PD - 1;
85 rnicp->attr.mem_pgsizes_bitmask = 0x7FFF; /* 4KB-128MB */
86 rnicp->attr.can_resize_wq = 0;
87 rnicp->attr.max_rdma_reads_per_qp = 8;
88 rnicp->attr.max_rdma_read_resources =
89 rnicp->attr.max_rdma_reads_per_qp * rnicp->attr.max_qps;
90 rnicp->attr.max_rdma_read_qp_depth = 8; /* IRD */
91 rnicp->attr.max_rdma_read_depth =
92 rnicp->attr.max_rdma_read_qp_depth * rnicp->attr.max_qps;
93 rnicp->attr.rq_overflow_handled = 0;
94 rnicp->attr.can_modify_ird = 0;
95 rnicp->attr.can_modify_ord = 0;
96 rnicp->attr.max_mem_windows = rnicp->attr.max_mem_regs - 1;
97 rnicp->attr.stag0_value = 1;
98 rnicp->attr.zbva_support = 1;
99 rnicp->attr.local_invalidate_fence = 1;
100 rnicp->attr.cq_overflow_detection = 1;
101 return;
102 }
103
104 static void open_rnic_dev(struct t3cdev *tdev)
105 {
106 struct iwch_dev *rnicp;
107 static int vers_printed;
108
109 PDBG("%s t3cdev %p\n", __FUNCTION__, tdev);
110 if (!vers_printed++)
111 printk(KERN_INFO MOD "Chelsio T3 RDMA Driver - version %s\n",
112 DRV_VERSION);
113 rnicp = (struct iwch_dev *)ib_alloc_device(sizeof(*rnicp));
114 if (!rnicp) {
115 printk(KERN_ERR MOD "Cannot allocate ib device\n");
116 return;
117 }
118 rnicp->rdev.ulp = rnicp;
119 rnicp->rdev.t3cdev_p = tdev;
120
121 mutex_lock(&dev_mutex);
122
123 if (cxio_rdev_open(&rnicp->rdev)) {
124 mutex_unlock(&dev_mutex);
125 printk(KERN_ERR MOD "Unable to open CXIO rdev\n");
126 ib_dealloc_device(&rnicp->ibdev);
127 return;
128 }
129
130 rnic_init(rnicp);
131
132 list_add_tail(&rnicp->entry, &dev_list);
133 mutex_unlock(&dev_mutex);
134
135 if (iwch_register_device(rnicp)) {
136 printk(KERN_ERR MOD "Unable to register device\n");
137 close_rnic_dev(tdev);
138 }
139 printk(KERN_INFO MOD "Initialized device %s\n",
140 pci_name(rnicp->rdev.rnic_info.pdev));
141 return;
142 }
143
144 static void close_rnic_dev(struct t3cdev *tdev)
145 {
146 struct iwch_dev *dev, *tmp;
147 PDBG("%s t3cdev %p\n", __FUNCTION__, tdev);
148 mutex_lock(&dev_mutex);
149 list_for_each_entry_safe(dev, tmp, &dev_list, entry) {
150 if (dev->rdev.t3cdev_p == tdev) {
151 list_del(&dev->entry);
152 iwch_unregister_device(dev);
153 cxio_rdev_close(&dev->rdev);
154 idr_destroy(&dev->cqidr);
155 idr_destroy(&dev->qpidr);
156 idr_destroy(&dev->mmidr);
157 ib_dealloc_device(&dev->ibdev);
158 break;
159 }
160 }
161 mutex_unlock(&dev_mutex);
162 }
163
164 static int __init iwch_init_module(void)
165 {
166 int err;
167
168 err = cxio_hal_init();
169 if (err)
170 return err;
171 err = iwch_cm_init();
172 if (err)
173 return err;
174 cxio_register_ev_cb(iwch_ev_dispatch);
175 cxgb3_register_client(&t3c_client);
176 return 0;
177 }
178
179 static void __exit iwch_exit_module(void)
180 {
181 cxgb3_unregister_client(&t3c_client);
182 cxio_unregister_ev_cb(iwch_ev_dispatch);
183 iwch_cm_term();
184 cxio_hal_exit();
185 }
186
187 module_init(iwch_init_module);
188 module_exit(iwch_exit_module);
189
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