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_send_local_activate_IRQ_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_send_local_activate_IRQ_uv(part);
  79 }
  80
  81 static void
  82 xpc_request_partition_reactivation_uv(struct xpc_partition *part)
  83 {
  84         xpc_send_local_activate_IRQ_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_chctl_all_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_chctl_all_flags = xpc_get_chctl_all_flags_uv;
 144         xpc_get_deliverable_msg = xpc_get_deliverable_msg_uv;
 145 }
 146
 147 void
 148 xpc_exit_uv(void)
 149 {
 150 }