Commit a20a8fa4 authored by Hari Bathini's avatar Hari Bathini Committed by Michael Ellerman
Browse files

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



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

Signed-off-by: default avatarHari Bathini <hbathini@linux.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/156821348482.5656.13646250851483648241.stgit@hbathini.in.ibm.com
parent 2790d01d

arch/powerpc/platforms/powernv/opal-fadump.c

+77 −2
Original line number Diff line number Diff line
@@ -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;

}
@@ -92,14 +110,71 @@ 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)

{

	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)

{

	return -EIO;