85 lines
2.6 KiB
Diff
85 lines
2.6 KiB
Diff
commit fe0c826464620fde9124f903d97102bb4237afa7
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Author: Haren Myneni <haren@linux.ibm.com>
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Date: Fri Jun 21 15:43:24 2024 -0700
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drmgr/phb: Add multipath partner device support for hotplug add
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The PHB node can have "ibm,multipath-partner-drc" property
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which means the device can be also configured with multipath
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partner path. This property provides the DRC index of the
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partner device. So for the hotplug add, both paths should be
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added and the following steps will be executed for the PHB add:
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- Add the specified PHB device
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- Find the partner path DRC index from "ibm,multipath-partner-drc"
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property for the specified device
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- If the node has this property and the partner path is
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already added, notify user about the partner device.
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- If the node has this property and the partner path can be
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configured, notify user to configure and add the partner
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device.
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Signed-off-by: Haren Myneni <haren@linux.ibm.com>
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Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
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diff --git a/src/drmgr/drslot_chrp_phb.c b/src/drmgr/drslot_chrp_phb.c
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index b3a4190..220d844 100644
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--- a/src/drmgr/drslot_chrp_phb.c
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+++ b/src/drmgr/drslot_chrp_phb.c
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@@ -441,8 +441,13 @@ static int acquire_phb(char *drc_name, struct dr_node **phb)
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*/
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static int add_phb(void)
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{
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- struct dr_node *phb = NULL;
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+ struct dr_node *phb = NULL, *partner_phb = NULL;
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+ uint32_t partner_drc_index = 0;
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+ char drc_index_str[10];
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int rc, n_children = 0;
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+ struct dr_connector drc;
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+ char path[DR_PATH_MAX];
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+ int partner_rc = 0;
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phb = get_node_by_name(usr_drc_name, PHB_NODES);
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if (phb) {
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@@ -507,10 +512,40 @@ static int add_phb(void)
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}
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}
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+ if (!rc) {
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+ /* Find the multipath partner device index if available */
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+ partner_rc = get_my_partner_drc_index(phb, &partner_drc_index);
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+ if (!partner_rc && partner_drc_index) {
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+ sprintf(drc_index_str, "%d", partner_drc_index);
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+ /* If the partner device is already added */
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+ partner_phb = get_node_by_name(drc_index_str,
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+ PHB_NODES);
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+ if (partner_phb) {
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+ printf("<%s> has partner device <%s>\n",
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+ phb->drc_name, partner_phb->drc_name);
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+ } else {
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+ /*
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+ * Find out if the partner device can be
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+ * configured. Get the DRC info for the
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+ * partner DRC index
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+ */
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+ partner_rc = get_drc_by_index(partner_drc_index,
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+ &drc, path, OFDT_BASE);
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+ if (partner_rc)
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+ printf("<%s> can have partner "
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+ "device but not assigned to "
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+ "LPAR yet\n", phb->drc_name);
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+ }
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+ }
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+ }
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+
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phb_add_error:
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if (phb)
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free_node(phb);
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+ if (partner_phb)
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+ free_node(partner_phb);
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+
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return rc;
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}
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