c53b229cb04e9fcbd0c27432fb124d82b47838eb
[linux-2.6.git] / drivers / misc / sgi-xp / xpc_uv.c
1 /*
2  * This file is subject to the terms and conditions of the GNU General Public
3  * License.  See the file "COPYING" in the main directory of this archive
4  * for more details.
5  *
6  * Copyright (c) 2008 Silicon Graphics, Inc.  All Rights Reserved.
7  */
8
9 /*
10  * Cross Partition Communication (XPC) uv-based functions.
11  *
12  *     Architecture specific implementation of common functions.
13  *
14  */
15
16 #include <linux/kernel.h>
17
18 /* >>> #include <gru/grukservices.h> */
19 /* >>> uv_gpa() is defined in <gru/grukservices.h> */
20 #define uv_gpa(_a)              ((unsigned long)_a)
21
22 #include "xpc.h"
23
24 static DECLARE_BITMAP(xpc_heartbeating_to_mask_uv, XP_MAX_NPARTITIONS_UV);
25
26 static void *xpc_activate_mq;
27
28 static void
29 xpc_IPI_send_local_activate_uv(struct xpc_partition *part)
30 {
31         /*
32          * >>> make our side think that the remote parition sent an activate
33          * >>> message our way. Also do what the activate IRQ handler would
34          * >>> do had one really been sent.
35          */
36 }
37
38 static enum xp_retval
39 xpc_rsvd_page_init_uv(struct xpc_rsvd_page *rp)
40 {
41         /* >>> need to have established xpc_activate_mq earlier */
42         rp->sn.activate_mq_gpa = uv_gpa(xpc_activate_mq);
43         return xpSuccess;
44 }
45
46 static void
47 xpc_increment_heartbeat_uv(void)
48 {
49         /* >>> send heartbeat msg to xpc_heartbeating_to_mask partids */
50 }
51
52 static void
53 xpc_heartbeat_init_uv(void)
54 {
55         bitmap_zero(xpc_heartbeating_to_mask_uv, XP_MAX_NPARTITIONS_UV);
56         xpc_heartbeating_to_mask = &xpc_heartbeating_to_mask_uv[0];
57 }
58
59 static void
60 xpc_heartbeat_exit_uv(void)
61 {
62         /* >>> send heartbeat_offline msg to xpc_heartbeating_to_mask partids */
63 }
64
65 static void
66 xpc_request_partition_activation_uv(struct xpc_rsvd_page *remote_rp,
67                                     u64 remote_rp_pa, int nasid)
68 {
69         short partid = remote_rp->SAL_partid;
70         struct xpc_partition *part = &xpc_partitions[partid];
71
72 /*
73  * >>> setup part structure with the bits of info we can glean from the rp
74  * >>>  part->remote_rp_pa = remote_rp_pa;
75  * >>>  part->sn.uv.activate_mq_gpa = remote_rp->sn.activate_mq_gpa;
76  */
77
78         xpc_IPI_send_local_activate_uv(part);
79 }
80
81 static void
82 xpc_request_partition_reactivation_uv(struct xpc_partition *part)
83 {
84         xpc_IPI_send_local_activate_uv(part);
85 }
86
87 /*
88  * Setup the infrastructure necessary to support XPartition Communication
89  * between the specified remote partition and the local one.
90  */
91 static enum xp_retval
92 xpc_setup_infrastructure_uv(struct xpc_partition *part)
93 {
94         /* >>> this function needs fleshing out */
95         return xpUnsupported;
96 }
97
98 /*
99  * Teardown the infrastructure necessary to support XPartition Communication
100  * between the specified remote partition and the local one.
101  */
102 static void
103 xpc_teardown_infrastructure_uv(struct xpc_partition *part)
104 {
105         /* >>> this function needs fleshing out */
106         return;
107 }
108
109 static enum xp_retval
110 xpc_make_first_contact_uv(struct xpc_partition *part)
111 {
112         /* >>> this function needs fleshing out */
113         return xpUnsupported;
114 }
115
116 static u64
117 xpc_get_IPI_flags_uv(struct xpc_partition *part)
118 {
119         /* >>> this function needs fleshing out */
120         return 0UL;
121 }
122
123 static struct xpc_msg *
124 xpc_get_deliverable_msg_uv(struct xpc_channel *ch)
125 {
126         /* >>> this function needs fleshing out */
127         return NULL;
128 }
129
130 void
131 xpc_init_uv(void)
132 {
133         xpc_rsvd_page_init = xpc_rsvd_page_init_uv;
134         xpc_increment_heartbeat = xpc_increment_heartbeat_uv;
135         xpc_heartbeat_init = xpc_heartbeat_init_uv;
136         xpc_heartbeat_exit = xpc_heartbeat_exit_uv;
137         xpc_request_partition_activation = xpc_request_partition_activation_uv;
138         xpc_request_partition_reactivation =
139             xpc_request_partition_reactivation_uv;
140         xpc_setup_infrastructure = xpc_setup_infrastructure_uv;
141         xpc_teardown_infrastructure = xpc_teardown_infrastructure_uv;
142         xpc_make_first_contact = xpc_make_first_contact_uv;
143         xpc_get_IPI_flags = xpc_get_IPI_flags_uv;
144         xpc_get_deliverable_msg = xpc_get_deliverable_msg_uv;
145 }
146
147 void
148 xpc_exit_uv(void)
149 {
150 }