[PATCH v4 12/25] powernv/fadump: define register/un-register callback functions
Hari Bathini
hbathini at linux.ibm.com
Tue Jul 16 21:33:23 AEST 2019
Make OPAL calls to register and un-register with firmware for MPIPL.
Signed-off-by: Hari Bathini <hbathini at linux.ibm.com>
---
arch/powerpc/platforms/powernv/opal-fadump.c | 71 +++++++++++++++++++++++++-
1 file changed, 69 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/platforms/powernv/opal-fadump.c b/arch/powerpc/platforms/powernv/opal-fadump.c
index 4b8504e..2179126 100644
--- a/arch/powerpc/platforms/powernv/opal-fadump.c
+++ b/arch/powerpc/platforms/powernv/opal-fadump.c
@@ -27,6 +27,20 @@
static struct opal_fadump_mem_struct *opal_fdm;
+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;
+}
+
static ulong opal_fadump_init_mem_struct(struct fw_dump *fadump_conf)
{
ulong addr = fadump_conf->reserve_dump_area_start;
@@ -47,6 +61,8 @@ 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;
}
@@ -88,12 +104,63 @@ static int opal_fadump_setup_kernel_metadata(struct fw_dump *fadump_conf)
static int opal_fadump_register_fadump(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_UNSUPPORTED:
+ pr_err("Support not available.\n");
+ fadump_conf->fadump_supported = 0;
+ fadump_conf->fadump_enabled = 0;
+ break;
+ case OPAL_INTERNAL_ERROR:
+ pr_err("Failed to register. Hardware Error(%lld).\n", rc);
+ break;
+ case OPAL_PARAMETER:
+ pr_err("Failed to register. Parameter Error(%lld).\n", rc);
+ break;
+ case OPAL_PERMISSION:
+ pr_err("Already registered!\n");
+ fadump_conf->dump_registered = 1;
+ err = -EEXIST;
+ break;
+ default:
+ pr_err("Failed to register. Unknown Error(%lld).\n", rc);
+ break;
+ }
+
+ return err;
}
static int opal_fadump_unregister_fadump(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_fadump(struct fw_dump *fadump_conf)
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