1 /*
2  * Copyright (c) 2013, Cisco Systems, 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  * 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  */
33 
34 #ifndef USNIC_IB_H_
35 #define USNIC_IB_H_
36 
37 #include <linux/iommu.h>
38 #include <linux/netdevice.h>
39 
40 #include <rdma/ib_verbs.h>
41 
42 
43 #include "usnic.h"
44 #include "usnic_abi.h"
45 #include "usnic_vnic.h"
46 
47 #define USNIC_IB_PORT_CNT		1
48 #define USNIC_IB_NUM_COMP_VECTORS	1
49 
50 extern unsigned int usnic_ib_share_vf;
51 
52 struct usnic_ib_ucontext {
53 	struct ib_ucontext		ibucontext;
54 	/* Protected by usnic_ib_dev->usdev_lock */
55 	struct list_head		qp_grp_list;
56 	struct list_head		link;
57 };
58 
59 struct usnic_ib_pd {
60 	struct ib_pd			ibpd;
61 	struct usnic_uiom_pd		*umem_pd;
62 };
63 
64 struct usnic_ib_cq {
65 	struct ib_cq			ibcq;
66 };
67 
68 struct usnic_ib_mr {
69 	struct ib_mr			ibmr;
70 	struct usnic_uiom_reg		*umem;
71 };
72 
73 struct usnic_ib_dev {
74 	struct ib_device		ib_dev;
75 	struct pci_dev			*pdev;
76 	struct net_device		*netdev;
77 	struct usnic_fwd_dev		*ufdev;
78 	struct list_head		ib_dev_link;
79 	struct list_head		vf_dev_list;
80 	struct list_head		ctx_list;
81 	struct mutex			usdev_lock;
82 
83 	/* provisioning information */
84 	struct kref			vf_cnt;
85 	unsigned int			vf_res_cnt[USNIC_VNIC_RES_TYPE_MAX];
86 
87 	/* sysfs vars for QPN reporting */
88 	struct kobject *qpn_kobj;
89 };
90 
91 struct usnic_ib_vf {
92 	struct usnic_ib_dev		*pf;
93 	struct mutex			lock;
94 	struct usnic_vnic		*vnic;
95 	unsigned int			qp_grp_ref_cnt;
96 	struct usnic_ib_pd		*pd;
97 	struct list_head		link;
98 };
99 
100 static inline
to_usdev(struct ib_device * ibdev)101 struct usnic_ib_dev *to_usdev(struct ib_device *ibdev)
102 {
103 	return container_of(ibdev, struct usnic_ib_dev, ib_dev);
104 }
105 
106 static inline
to_ucontext(struct ib_ucontext * ibucontext)107 struct usnic_ib_ucontext *to_ucontext(struct ib_ucontext *ibucontext)
108 {
109 	return container_of(ibucontext, struct usnic_ib_ucontext, ibucontext);
110 }
111 
112 static inline
to_upd(struct ib_pd * ibpd)113 struct usnic_ib_pd *to_upd(struct ib_pd *ibpd)
114 {
115 	return container_of(ibpd, struct usnic_ib_pd, ibpd);
116 }
117 
118 static inline
to_uucontext(struct ib_ucontext * ibucontext)119 struct usnic_ib_ucontext *to_uucontext(struct ib_ucontext *ibucontext)
120 {
121 	return container_of(ibucontext, struct usnic_ib_ucontext, ibucontext);
122 }
123 
124 static inline
to_umr(struct ib_mr * ibmr)125 struct usnic_ib_mr *to_umr(struct ib_mr *ibmr)
126 {
127 	return container_of(ibmr, struct usnic_ib_mr, ibmr);
128 }
129 void usnic_ib_log_vf(struct usnic_ib_vf *vf);
130 
131 #define UPDATE_PTR_LEFT(N, P, L)			\
132 do {							\
133 	L -= (N);					\
134 	P += (N);					\
135 } while (0)
136 
137 #endif /* USNIC_IB_H_ */
138