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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* pSeries firmware setup code.
*
* Portions from arch/powerpc/platforms/pseries/setup.c:
* Copyright (C) 1995 Linus Torvalds
* Adapted from 'alpha' version by Gary Thomas
* Modified by Cort Dougan (cort@cs.nmt.edu)
* Modified by PPC64 Team, IBM Corp
*
* Portions from arch/powerpc/kernel/firmware.c
* Copyright (C) 2001 Ben. Herrenschmidt (benh@kernel.crashing.org)
* Modifications for ppc64:
* Copyright (C) 2003 Dave Engebretsen <engebret@us.ibm.com>
* Copyright (C) 2005 Stephen Rothwell, IBM Corporation
*
* Copyright 2006 IBM Corporation.
*/
#include <linux/of_fdt.h>
#include <asm/firmware.h>
#include <asm/prom.h>
#include <asm/udbg.h>
#include <asm/svm.h>
#include "pseries.h"
struct hypertas_fw_feature {
unsigned long val;
char * name;
};
/*
* The names in this table match names in rtas/ibm,hypertas-functions. If the
* entry ends in a '*', only upto the '*' is matched. Otherwise the entire
* string must match.
*/
static __initdata struct hypertas_fw_feature
hypertas_fw_features_table[] = {
{FW_FEATURE_PFT, "hcall-pft"},
{FW_FEATURE_TCE, "hcall-tce"},
{FW_FEATURE_SPRG0, "hcall-sprg0"},
{FW_FEATURE_DABR, "hcall-dabr"},
{FW_FEATURE_COPY, "hcall-copy"},
{FW_FEATURE_ASR, "hcall-asr"},
{FW_FEATURE_DEBUG, "hcall-debug"},
{FW_FEATURE_PERF, "hcall-perf"},
{FW_FEATURE_DUMP, "hcall-dump"},
{FW_FEATURE_INTERRUPT, "hcall-interrupt"},
{FW_FEATURE_MIGRATE, "hcall-migrate"},
{FW_FEATURE_PERFMON, "hcall-perfmon"},
{FW_FEATURE_CRQ, "hcall-crq"},
{FW_FEATURE_VIO, "hcall-vio"},
{FW_FEATURE_RDMA, "hcall-rdma"},
{FW_FEATURE_LLAN, "hcall-lLAN"},
{FW_FEATURE_BULK_REMOVE, "hcall-bulk"},
{FW_FEATURE_XDABR, "hcall-xdabr"},
{FW_FEATURE_PUT_TCE_IND | FW_FEATURE_STUFF_TCE,
"hcall-multi-tce"},
{FW_FEATURE_SPLPAR, "hcall-splpar"},
{FW_FEATURE_VPHN, "hcall-vphn"},
{FW_FEATURE_SET_MODE, "hcall-set-mode"},
{FW_FEATURE_BEST_ENERGY, "hcall-best-energy-1*"},
{FW_FEATURE_HPT_RESIZE, "hcall-hpt-resize"},
{FW_FEATURE_BLOCK_REMOVE, "hcall-block-remove"},
{FW_FEATURE_PAPR_SCM, "hcall-scm"},
};
/* Build up the firmware features bitmask using the contents of
* device-tree/ibm,hypertas-functions. Ultimately this functionality may
* be moved into prom.c prom_init().
*/
static void __init fw_hypertas_feature_init(const char *hypertas,
unsigned long len)
{
const char *s;
int i;
pr_debug(" -> fw_hypertas_feature_init()\n");
for (s = hypertas; s < hypertas + len; s += strlen(s) + 1) {
for (i = 0; i < ARRAY_SIZE(hypertas_fw_features_table); i++) {
const char *name = hypertas_fw_features_table[i].name;
size_t size;
/*
* If there is a '*' at the end of name, only check
* upto there
*/
size = strlen(name);
if (size && name[size - 1] == '*') {
if (strncmp(name, s, size - 1))
continue;
} else if (strcmp(name, s))
continue;
/* we have a match */
powerpc_firmware_features |=
hypertas_fw_features_table[i].val;
break;
}
}
if (is_secure_guest() &&
(powerpc_firmware_features & FW_FEATURE_PUT_TCE_IND)) {
powerpc_firmware_features &= ~FW_FEATURE_PUT_TCE_IND;
pr_debug("SVM: disabling PUT_TCE_IND firmware feature\n");
}
pr_debug(" <- fw_hypertas_feature_init()\n");
}
struct vec5_fw_feature {
unsigned long val;
unsigned int feature;
};
static __initdata struct vec5_fw_feature
vec5_fw_features_table[] = {
{FW_FEATURE_TYPE1_AFFINITY, OV5_TYPE1_AFFINITY},
{FW_FEATURE_PRRN, OV5_PRRN},
{FW_FEATURE_DRMEM_V2, OV5_DRMEM_V2},
{FW_FEATURE_DRC_INFO, OV5_DRC_INFO},
};
static void __init fw_vec5_feature_init(const char *vec5, unsigned long len)
{
unsigned int index, feat;
int i;
pr_debug(" -> fw_vec5_feature_init()\n");
for (i = 0; i < ARRAY_SIZE(vec5_fw_features_table); i++) {
index = OV5_INDX(vec5_fw_features_table[i].feature);
feat = OV5_FEAT(vec5_fw_features_table[i].feature);
if (index < len && (vec5[index] & feat))
powerpc_firmware_features |=
vec5_fw_features_table[i].val;
}
pr_debug(" <- fw_vec5_feature_init()\n");
}
/*
* Called very early, MMU is off, device-tree isn't unflattened
*/
static int __init probe_fw_features(unsigned long node, const char *uname, int
depth, void *data)
{
const char *prop;
int len;
static int hypertas_found;
static int vec5_found;
if (depth != 1)
return 0;
if (!strcmp(uname, "rtas") || !strcmp(uname, "rtas@0")) {
prop = of_get_flat_dt_prop(node, "ibm,hypertas-functions",
&len);
if (prop) {
powerpc_firmware_features |= FW_FEATURE_LPAR;
fw_hypertas_feature_init(prop, len);
}
hypertas_found = 1;
}
if (!strcmp(uname, "chosen")) {
prop = of_get_flat_dt_prop(node, "ibm,architecture-vec-5",
&len);
if (prop)
fw_vec5_feature_init(prop, len);
vec5_found = 1;
}
return hypertas_found && vec5_found;
}
void __init pseries_probe_fw_features(void)
{
of_scan_flat_dt(probe_fw_features, NULL);
}
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