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powerpc/fadump: define OPAL register/un-register callback functions

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Make OPAL calls to register and un-register with firmware for MPIPL.

Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/156821348482.5656.13646250851483648241.stgit@hbathini.in.ibm.com
This commit is contained in:
Hari Bathini 2019-09-11 20:21:33 +05:30 committed by Michael Ellerman
parent 2790d01d1e
commit a20a8fa42d
1 changed files with 77 additions and 2 deletions
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79
arch/powerpc/platforms/powernv/opal-fadump.c
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@ -21,6 +21,22 @@
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: %#016llx\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)
{
@ -50,6 +66,8 @@ static u64 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;
}
@ -92,12 +110,69 @@ static int opal_fadump_setup_metadata(struct fw_dump *fadump_conf)
static int opal_fadump_register(struct fw_dump *fadump_conf)
{
return -EIO;
s64 rc = OPAL_PARAMETER;
int i, err = -EIO;
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)