1 /*
2  * Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
3  *
4  * This program is free software; you may redistribute it and/or modify
5  * it under the terms of the GNU General Public License as published by
6  * the Free Software Foundation; version 2 of the License.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
9  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
10  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
11  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
12  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
13  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
14  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
15  * SOFTWARE.
16  *
17  */
18 
19 #ifndef USNIC_IB_H_
20 #define USNIC_IB_H_
21 
22 #include <linux/iommu.h>
23 #include <linux/netdevice.h>
24 
25 #include <rdma/ib_verbs.h>
26 
27 
28 #include "usnic.h"
29 #include "usnic_abi.h"
30 #include "usnic_vnic.h"
31 
32 #define USNIC_IB_PORT_CNT		1
33 #define USNIC_IB_NUM_COMP_VECTORS	1
34 
35 extern unsigned int usnic_ib_share_vf;
36 
37 struct usnic_ib_ucontext {
38 	struct ib_ucontext		ibucontext;
39 	/* Protected by usnic_ib_dev->usdev_lock */
40 	struct list_head		qp_grp_list;
41 	struct list_head		link;
42 };
43 
44 struct usnic_ib_pd {
45 	struct ib_pd			ibpd;
46 	struct usnic_uiom_pd		*umem_pd;
47 };
48 
49 struct usnic_ib_mr {
50 	struct ib_mr			ibmr;
51 	struct usnic_uiom_reg		*umem;
52 };
53 
54 struct usnic_ib_dev {
55 	struct ib_device		ib_dev;
56 	struct pci_dev			*pdev;
57 	struct net_device		*netdev;
58 	struct usnic_fwd_dev		*ufdev;
59 	struct list_head		ib_dev_link;
60 	struct list_head		vf_dev_list;
61 	struct list_head		ctx_list;
62 	struct mutex			usdev_lock;
63 
64 	/* provisioning information */
65 	struct kref			vf_cnt;
66 	unsigned int			vf_res_cnt[USNIC_VNIC_RES_TYPE_MAX];
67 
68 	/* sysfs vars for QPN reporting */
69 	struct kobject *qpn_kobj;
70 };
71 
72 struct usnic_ib_vf {
73 	struct usnic_ib_dev		*pf;
74 	spinlock_t			lock;
75 	struct usnic_vnic		*vnic;
76 	unsigned int			qp_grp_ref_cnt;
77 	struct usnic_ib_pd		*pd;
78 	struct list_head		link;
79 };
80 
81 static inline
82 struct usnic_ib_dev *to_usdev(struct ib_device *ibdev)
83 {
84 	return container_of(ibdev, struct usnic_ib_dev, ib_dev);
85 }
86 
87 static inline
88 struct usnic_ib_ucontext *to_ucontext(struct ib_ucontext *ibucontext)
89 {
90 	return container_of(ibucontext, struct usnic_ib_ucontext, ibucontext);
91 }
92 
93 static inline
94 struct usnic_ib_pd *to_upd(struct ib_pd *ibpd)
95 {
96 	return container_of(ibpd, struct usnic_ib_pd, ibpd);
97 }
98 
99 static inline
100 struct usnic_ib_ucontext *to_uucontext(struct ib_ucontext *ibucontext)
101 {
102 	return container_of(ibucontext, struct usnic_ib_ucontext, ibucontext);
103 }
104 
105 static inline
106 struct usnic_ib_mr *to_umr(struct ib_mr *ibmr)
107 {
108 	return container_of(ibmr, struct usnic_ib_mr, ibmr);
109 }
110 void usnic_ib_log_vf(struct usnic_ib_vf *vf);
111 
112 #define UPDATE_PTR_LEFT(N, P, L)			\
113 do {							\
114 	L -= (N);					\
115 	P += (N);					\
116 } while (0)
117 
118 #endif /* USNIC_IB_H_ */
119