Make OPAL calls to register and un-register with firmware for MPIPL.
Signed-off-by: Hari Bathini <hbath...@linux.ibm.com>
---
arch/powerpc/platforms/powernv/opal-fadump.c | 79 +++++++++++++++++++++++++-
1 file changed, 77 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/platforms/powernv/opal-fadump.c
b/arch/powerpc/platforms/powernv/opal-fadump.c
index e466f7e..91fb909 100644
--- a/arch/powerpc/platforms/powernv/opal-fadump.c
+++ b/arch/powerpc/platforms/powernv/opal-fadump.c
@@ -23,6 +23,22 @@
static struct opal_fadump_mem_struct *opal_fdm;
+static int opal_fadump_unregister(struct fw_dump *fadump_conf);
+
+static void opal_fadump_update_config(struct fw_dump *fadump_conf,
+ const struct opal_fadump_mem_struct *fdm)
+{
+ /*
+ * The destination address of the first boot memory region is the
+ * destination address of boot memory regions.
+ */
+ fadump_conf->boot_mem_dest_addr = fdm->rgn[0].dest;
+ pr_debug("Destination address of boot memory regions: %#016lx\n",
+ fadump_conf->boot_mem_dest_addr);
+
+ fadump_conf->fadumphdr_addr = fdm->fadumphdr_addr;
+}
+
/* Initialize kernel metadata */
static void opal_fadump_init_metadata(struct opal_fadump_mem_struct *fdm)
{
@@ -52,6 +68,8 @@ static ulong opal_fadump_init_mem_struct(struct fw_dump
*fadump_conf)
opal_fdm->fadumphdr_addr = (opal_fdm->rgn[0].dest +
fadump_conf->boot_memory_size);
+ opal_fadump_update_config(fadump_conf, opal_fdm);
+
return addr;
}
@@ -97,12 +115,69 @@ static int opal_fadump_setup_metadata(struct fw_dump
*fadump_conf)
static int opal_fadump_register(struct fw_dump *fadump_conf)
{
- return -EIO;
+ int i, err = -EIO;
+ s64 rc;
+
+ for (i = 0; i < opal_fdm->region_cnt; i++) {
+ rc = opal_mpipl_update(OPAL_MPIPL_ADD_RANGE,
+ opal_fdm->rgn[i].src,
+ opal_fdm->rgn[i].dest,
+ opal_fdm->rgn[i].size);
+ if (rc != OPAL_SUCCESS)
+ break;
+
+ opal_fdm->registered_regions++;
+ }
+
+ switch (rc) {
+ case OPAL_SUCCESS:
+ pr_info("Registration is successful!\n");
+ fadump_conf->dump_registered = 1;
+ err = 0;
+ break;
+ case OPAL_RESOURCE:
+ /* If MAX regions limit in f/w is hit, warn and proceed. */
+ pr_warn("%d regions could not be registered for MPIPL as MAX
limit is reached!\n",
+ (opal_fdm->region_cnt - opal_fdm->registered_regions));
+ fadump_conf->dump_registered = 1;
+ err = 0;
+ break;
+ case OPAL_PARAMETER:
+ pr_err("Failed to register. Parameter Error(%lld).\n", rc);
+ break;
+ case OPAL_HARDWARE:
+ pr_err("Support not available.\n");
+ fadump_conf->fadump_supported = 0;
+ fadump_conf->fadump_enabled = 0;
+ break;
+ default:
+ pr_err("Failed to register. Unknown Error(%lld).\n", rc);
+ break;
+ }
+
+ /*
+ * If some regions were registered before OPAL_MPIPL_ADD_RANGE
+ * OPAL call failed, unregister all regions.
+ */
+ if ((err < 0) && (opal_fdm->registered_regions > 0))
+ opal_fadump_unregister(fadump_conf);
+
+ return err;
}
static int opal_fadump_unregister(struct fw_dump *fadump_conf)
{
- return -EIO;
+ s64 rc;
+
+ rc = opal_mpipl_update(OPAL_MPIPL_REMOVE_ALL, 0, 0, 0);
+ if (rc) {
+ pr_err("Failed to un-register - unexpected Error(%lld).\n", rc);
+ return -EIO;
+ }
+
+ opal_fdm->registered_regions = 0;
+ fadump_conf->dump_registered = 0;
+ return 0;
}
static int opal_fadump_invalidate(struct fw_dump *fadump_conf)
