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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <sun_sas.h>
/*
* Discover an HBA node with matching path.
* The di_node_t argument should be the root of the device tree.
* This routine assumes the locks have been taken
*/
static int
find_matching_hba(di_node_t node, void *arg)
{
int *propData, rval;
walkarg_t *wa = (walkarg_t *)arg;
char *devpath, fulldevpath[MAXPATHLEN];
/* Skip stub(instance -1) nodes */
if (IS_STUB_NODE(node)) {
return (DI_WALK_CONTINUE);
}
rval = di_prop_lookup_ints(DDI_DEV_T_ANY, node,
"sm-hba-supported", &propData);
if (rval < 0) {
return (DI_WALK_CONTINUE);
} else {
if ((devpath = di_devfs_path(node)) == NULL) {
/* still continue to see if there is matching one. */
return (DI_WALK_CONTINUE);
}
(void) snprintf(fulldevpath, MAXPATHLEN, "%s%s", DEVICES_DIR,
devpath);
if ((strstr(fulldevpath, wa->devpath)) != NULL) {
*wa->flag = B_TRUE;
/* Found a node. No need to walk any more. */
di_devfs_path_free(devpath);
return (DI_WALK_TERMINATE);
}
di_devfs_path_free(devpath);
}
return (DI_WALK_CONTINUE);
}
/*
* Refreshes information about an HBA
*
* Note: This routine holds the locks in write mode
* during most of the processing, and as such, will cause
* all other threads to block on entry into the library
* until the refresh is complete. An optimization would be
* to put fine-grain locking in for the open_handle structures.
*/
void
Sun_sasRefreshAdapterConfiguration()
{
const char ROUTINE[] =
"Sun_sasRefreshAdapterConfiguration";
struct sun_sas_hba *hba_ptr;
di_node_t root;
hrtime_t start;
hrtime_t end;
double duration;
walkarg_t wa;
/*
* We're going to be tweaking a lot of global lists, so write
* lock them.
*/
lock(&all_hbas_lock);
lock(&open_handles_lock);
start = gethrtime();
/* Grab device tree */
if ((root = di_init("/", DINFOCACHE)) == DI_NODE_NIL) {
log(LOG_DEBUG, ROUTINE,
"Unable to load device tree for reason \"%s\"",
strerror(errno));
unlock(&open_handles_lock);
unlock(&all_hbas_lock);
return;
}
end = gethrtime();
duration = end - start;
duration /= HR_SECOND;
log(LOG_DEBUG, ROUTINE, "Device tree init took "
"%.6f seconds", duration);
for (hba_ptr = global_hba_head; hba_ptr != NULL;
hba_ptr = hba_ptr->next) {
wa.devpath = hba_ptr->device_path;
wa.flag = (boolean_t *)calloc(1, sizeof (boolean_t));
*wa.flag = B_FALSE;
if (di_walk_node(root, DI_WALK_SIBFIRST, &wa,
find_matching_hba) != 0) {
log(LOG_DEBUG, ROUTINE, "di_walk_node failed.");
unlock(&open_handles_lock);
unlock(&all_hbas_lock);
S_FREE(wa.flag);
di_fini(root);
return;
}
if (*wa.flag == B_FALSE) {
/*
* Keep the HBA as it is including open handles
* per the SM-HBA standards. Just mark it as invalid.
*/
log(LOG_DEBUG, ROUTINE, "No matching HBA found. %s",
hba_ptr->device_path);
hba_ptr->invalid = B_TRUE;
}
S_FREE(wa.flag);
}
/*
* Now we marked missing HBA(s). Redisoover hbas to refresh
* or add any new adapter to the hba list.
* Simply call devtree_get_all_hbas().
*/
if (devtree_get_all_hbas(root) != HBA_STATUS_OK) {
log(LOG_DEBUG, ROUTINE, "devtree_get_all_hbas failed.");
}
di_fini(root);
unlock(&open_handles_lock);
unlock(&all_hbas_lock);
}
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