u-boot/arch/arm/mach-imx/imx8/fdt.c

304 lines
6.7 KiB
C
Raw Normal View History

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2019 NXP
*/
#include <common.h>
#include <log.h>
#include <asm/arch/sci/sci.h>
#include <asm/arch/sys_proto.h>
#include <dm/ofnode.h>
#include <fdt_support.h>
#include <linux/libfdt.h>
DECLARE_GLOBAL_DATA_PTR;
static bool check_owned_resource(sc_rsrc_t rsrc_id)
{
bool owned;
owned = sc_rm_is_resource_owned(-1, rsrc_id);
return owned;
}
static int disable_fdt_node(void *blob, int nodeoffset)
{
int rc, ret;
const char *status = "disabled";
do {
rc = fdt_setprop(blob, nodeoffset, "status", status,
strlen(status) + 1);
if (rc) {
if (rc == -FDT_ERR_NOSPACE) {
ret = fdt_increase_size(blob, 512);
if (ret)
return ret;
}
}
} while (rc == -FDT_ERR_NOSPACE);
return rc;
}
static void update_fdt_with_owned_resources(void *blob)
{
/*
* Traverses the fdt nodes, check its power domain and use
* the resource id in the power domain for checking whether
* it is owned by current partition
*/
struct fdtdec_phandle_args args;
int offset = 0, depth = 0;
u32 rsrc_id;
int rc, i;
for (offset = fdt_next_node(blob, offset, &depth); offset > 0;
offset = fdt_next_node(blob, offset, &depth)) {
debug("Node name: %s, depth %d\n",
fdt_get_name(blob, offset, NULL), depth);
if (!fdt_get_property(blob, offset, "power-domains", NULL)) {
debug(" - ignoring node %s\n",
fdt_get_name(blob, offset, NULL));
continue;
}
if (!fdtdec_get_is_enabled(blob, offset)) {
debug(" - ignoring node %s\n",
fdt_get_name(blob, offset, NULL));
continue;
}
i = 0;
while (true) {
rc = fdtdec_parse_phandle_with_args(blob, offset,
"power-domains",
"#power-domain-cells",
0, i++, &args);
if (rc == -ENOENT) {
break;
} else if (rc) {
printf("Parse power-domains of %s wrong: %d\n",
fdt_get_name(blob, offset, NULL), rc);
continue;
}
rsrc_id = args.args[0];
if (!check_owned_resource(rsrc_id)) {
rc = disable_fdt_node(blob, offset);
if (!rc) {
printf("Disable %s rsrc %u not owned\n",
fdt_get_name(blob, offset, NULL),
rsrc_id);
} else {
printf("Unable to disable %s, err=%s\n",
fdt_get_name(blob, offset, NULL),
fdt_strerror(rc));
}
}
}
}
}
static int config_smmu_resource_sid(int rsrc, int sid)
{
int err;
err = sc_rm_set_master_sid(-1, rsrc, sid);
debug("set_master_sid rsrc=%d sid=0x%x err=%d\n", rsrc, sid, err);
if (err != SC_ERR_NONE) {
if (!check_owned_resource(rsrc)) {
printf("%s rsrc[%d] not owned\n", __func__, rsrc);
return -1;
}
pr_err("fail set_master_sid rsrc=%d sid=0x%x err=%d\n", rsrc, sid, err);
return -EINVAL;
}
return 0;
}
static int config_smmu_fdt_device_sid(void *blob, int device_offset, int sid)
{
const char *name = fdt_get_name(blob, device_offset, NULL);
struct fdtdec_phandle_args args;
int rsrc, ret;
int proplen;
const fdt32_t *prop;
int i;
prop = fdt_getprop(blob, device_offset, "fsl,sc_rsrc_id", &proplen);
if (prop) {
int i;
debug("configure node %s sid 0x%x for %d resources\n",
name, sid, (int)(proplen / sizeof(fdt32_t)));
for (i = 0; i < proplen / sizeof(fdt32_t); ++i) {
ret = config_smmu_resource_sid(fdt32_to_cpu(prop[i]),
sid);
if (ret)
return ret;
}
return 0;
}
i = 0;
while (true) {
ret = fdtdec_parse_phandle_with_args(blob, device_offset,
"power-domains",
"#power-domain-cells",
0, i++, &args);
if (ret == -ENOENT) {
break;
} else if (ret) {
printf("Parse power-domains of node %s wrong: %d\n",
fdt_get_name(blob, device_offset, NULL), ret);
continue;
}
debug("configure node %s sid 0x%x rsrc=%d\n",
name, sid, rsrc);
rsrc = args.args[0];
ret = config_smmu_resource_sid(rsrc, sid);
if (ret)
break;
}
return ret;
}
static int config_smmu_fdt(void *blob)
{
int offset, proplen, i, ret;
const fdt32_t *prop;
const char *name;
/* Legacy smmu bindings, still used by xen. */
offset = fdt_node_offset_by_compatible(blob, 0, "arm,mmu-500");
prop = fdt_getprop(blob, offset, "mmu-masters", &proplen);
if (offset > 0 && prop) {
debug("found legacy mmu-masters property\n");
for (i = 0; i < proplen / 8; ++i) {
u32 phandle = fdt32_to_cpu(prop[2 * i]);
int sid = fdt32_to_cpu(prop[2 * i + 1]);
int device_offset;
device_offset = fdt_node_offset_by_phandle(blob,
phandle);
if (device_offset < 0) {
pr_err("Not find device from mmu_masters: %d",
device_offset);
continue;
}
ret = config_smmu_fdt_device_sid(blob, device_offset,
sid);
if (ret)
return ret;
}
/* Ignore new bindings if old bindings found, just like linux. */
return 0;
}
/* Generic smmu bindings */
offset = 0;
while ((offset = fdt_next_node(blob, offset, NULL)) > 0) {
name = fdt_get_name(blob, offset, NULL);
prop = fdt_getprop(blob, offset, "iommus", &proplen);
if (!prop)
continue;
debug("node %s iommus proplen %d\n", name, proplen);
if (proplen == 12) {
int sid = fdt32_to_cpu(prop[1]);
config_smmu_fdt_device_sid(blob, offset, sid);
} else if (proplen != 4) {
debug("node %s ignore unexpected iommus proplen=%d\n",
name, proplen);
}
}
return 0;
}
static int ft_add_optee_node(void *fdt, struct bd_info *bd)
{
const char *path, *subpath;
int offs;
/*
* No TEE space allocated indicating no TEE running, so no
* need to add optee node in dts
*/
if (!boot_pointer[1])
return 0;
offs = fdt_increase_size(fdt, 512);
if (offs) {
printf("No Space for dtb\n");
return 1;
}
path = "/firmware";
offs = fdt_path_offset(fdt, path);
if (offs < 0) {
path = "/";
offs = fdt_path_offset(fdt, path);
if (offs < 0) {
printf("Could not find root node.\n");
return offs;
}
subpath = "firmware";
offs = fdt_add_subnode(fdt, offs, subpath);
if (offs < 0) {
printf("Could not create %s node.\n", subpath);
return offs;
}
}
subpath = "optee";
offs = fdt_add_subnode(fdt, offs, subpath);
if (offs < 0) {
printf("Could not create %s node.\n", subpath);
return offs;
}
fdt_setprop_string(fdt, offs, "compatible", "linaro,optee-tz");
fdt_setprop_string(fdt, offs, "method", "smc");
return 0;
}
int ft_system_setup(void *blob, struct bd_info *bd)
{
int ret;
int off;
if (CONFIG_BOOTAUX_RESERVED_MEM_BASE) {
off = fdt_add_mem_rsv(blob, CONFIG_BOOTAUX_RESERVED_MEM_BASE,
CONFIG_BOOTAUX_RESERVED_MEM_SIZE);
if (off < 0)
printf("Failed to reserve memory for bootaux: %s\n",
fdt_strerror(off));
}
update_fdt_with_owned_resources(blob);
if (is_imx8qm()) {
ret = config_smmu_fdt(blob);
if (ret)
return ret;
}
return ft_add_optee_node(blob, bd);
}