git.oblomov.eu Git - linux-2.6/blob - 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 #include <asm/uv/uv_hub.h>
  18 #include "../sgi-gru/grukservices.h"
  19 #include "xpc.h"
  20
  21 static DECLARE_BITMAP(xpc_heartbeating_to_mask_uv, XP_MAX_NPARTITIONS_UV);
  22
  23 static void *xpc_activate_mq;
  24
  25 static void
  26 xpc_send_local_activate_IRQ_uv(struct xpc_partition *part)
  27 {
  28         /*
  29          * !!! Make our side think that the remote parition sent an activate
  30          * !!! message our way. Also do what the activate IRQ handler would
  31          * !!! do had one really been sent.
  32          */
  33 }
  34
  35 static enum xp_retval
  36 xpc_rsvd_page_init_uv(struct xpc_rsvd_page *rp)
  37 {
  38         /* !!! need to have established xpc_activate_mq earlier */
  39         rp->sn.activate_mq_gpa = uv_gpa(xpc_activate_mq);
  40         return xpSuccess;
  41 }
  42
  43 static void
  44 xpc_increment_heartbeat_uv(void)
  45 {
  46         /* !!! send heartbeat msg to xpc_heartbeating_to_mask partids */
  47 }
  48
  49 static void
  50 xpc_heartbeat_init_uv(void)
  51 {
  52         bitmap_zero(xpc_heartbeating_to_mask_uv, XP_MAX_NPARTITIONS_UV);
  53         xpc_heartbeating_to_mask = &xpc_heartbeating_to_mask_uv[0];
  54 }
  55
  56 static void
  57 xpc_heartbeat_exit_uv(void)
  58 {
  59         /* !!! send heartbeat_offline msg to xpc_heartbeating_to_mask partids */
  60 }
  61
  62 static void
  63 xpc_request_partition_activation_uv(struct xpc_rsvd_page *remote_rp,
  64                                     unsigned long remote_rp_pa, int nasid)
  65 {
  66         short partid = remote_rp->SAL_partid;
  67         struct xpc_partition *part = &xpc_partitions[partid];
  68
  69 /*
  70  * !!! Setup part structure with the bits of info we can glean from the rp:
  71  * !!!  part->remote_rp_pa = remote_rp_pa;
  72  * !!!  part->sn.uv.activate_mq_gpa = remote_rp->sn.activate_mq_gpa;
  73  */
  74
  75         xpc_send_local_activate_IRQ_uv(part);
  76 }
  77
  78 static void
  79 xpc_request_partition_reactivation_uv(struct xpc_partition *part)
  80 {
  81         xpc_send_local_activate_IRQ_uv(part);
  82 }
  83
  84 /*
  85  * Setup the infrastructure necessary to support XPartition Communication
  86  * between the specified remote partition and the local one.
  87  */
  88 static enum xp_retval
  89 xpc_setup_infrastructure_uv(struct xpc_partition *part)
  90 {
  91         /* !!! this function needs fleshing out */
  92         return xpUnsupported;
  93 }
  94
  95 /*
  96  * Teardown the infrastructure necessary to support XPartition Communication
  97  * between the specified remote partition and the local one.
  98  */
  99 static void
 100 xpc_teardown_infrastructure_uv(struct xpc_partition *part)
 101 {
 102         /* !!! this function needs fleshing out */
 103         return;
 104 }
 105
 106 static enum xp_retval
 107 xpc_make_first_contact_uv(struct xpc_partition *part)
 108 {
 109         /* !!! this function needs fleshing out */
 110         return xpUnsupported;
 111 }
 112
 113 static u64
 114 xpc_get_chctl_all_flags_uv(struct xpc_partition *part)
 115 {
 116         /* !!! this function needs fleshing out */
 117         return 0UL;
 118 }
 119
 120 static struct xpc_msg *
 121 xpc_get_deliverable_msg_uv(struct xpc_channel *ch)
 122 {
 123         /* !!! this function needs fleshing out */
 124         return NULL;
 125 }
 126
 127 void
 128 xpc_init_uv(void)
 129 {
 130         xpc_rsvd_page_init = xpc_rsvd_page_init_uv;
 131         xpc_increment_heartbeat = xpc_increment_heartbeat_uv;
 132         xpc_heartbeat_init = xpc_heartbeat_init_uv;
 133         xpc_heartbeat_exit = xpc_heartbeat_exit_uv;
 134         xpc_request_partition_activation = xpc_request_partition_activation_uv;
 135         xpc_request_partition_reactivation =
 136             xpc_request_partition_reactivation_uv;
 137         xpc_setup_infrastructure = xpc_setup_infrastructure_uv;
 138         xpc_teardown_infrastructure = xpc_teardown_infrastructure_uv;
 139         xpc_make_first_contact = xpc_make_first_contact_uv;
 140         xpc_get_chctl_all_flags = xpc_get_chctl_all_flags_uv;
 141         xpc_get_deliverable_msg = xpc_get_deliverable_msg_uv;
 142 }
 143
 144 void
 145 xpc_exit_uv(void)
 146 {
 147 }