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fdtdec: Support reserved-memory flags

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Reserved memory nodes can have additional flags. Support reading and
writing these flags to ensure that reserved memory nodes can be properly
parsed and emitted.

This converts support for the existing "no-map" flag to avoid extending
the argument list for fdtdec_add_reserved_memory() to excessive length.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>
This commit is contained in:
Thierry Reding 2021-09-03 15:16:21 +02:00 committed by Tom Warren
parent 9019487608
commit b9aad37591
10 changed files with 50 additions and 34 deletions
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2
arch/arm/cpu/armv8/fsl-layerscape/soc.c
View File

@ -55,7 +55,7 @@ int ls_gic_rd_tables_init(void *blob)
lpi_base.start = addr;
lpi_base.end = addr + size - 1;
ret = fdtdec_add_reserved_memory(blob, "lpi_rd_table", &lpi_base, NULL,
NULL, 0, false);
NULL, 0, 0);
if (ret) {
debug("%s: failed to add reserved memory\n", __func__);
return ret;

2
arch/riscv/lib/fdt_fixup.c
View File

@ -75,7 +75,7 @@ int riscv_fdt_copy_resv_mem_node(const void *src, void *dst)
pmp_mem.start = addr;
pmp_mem.end = addr + size - 1;
err = fdtdec_add_reserved_memory(dst, basename, &pmp_mem,
NULL, 0, &phandle, false);
NULL, 0, &phandle, 0);
if (err < 0 && err != -FDT_ERR_EXISTS) {
log_err("failed to add reserved memory: %d\n", err);
return err;

4
board/nvidia/p2371-2180/p2371-2180.c
View File

@ -129,7 +129,7 @@ static int ft_copy_carveout(void *dst, const void *src, const char *node)
int err;
err = fdtdec_get_carveout(src, node, "memory-region", 0, &fb, NULL,
NULL, NULL);
NULL, NULL, NULL);
if (err < 0) {
if (err != -FDT_ERR_NOTFOUND)
printf("failed to get carveout for %s: %d\n", node,
@ -139,7 +139,7 @@ static int ft_copy_carveout(void *dst, const void *src, const char *node)
}
err = fdtdec_set_carveout(dst, node, "memory-region", 0, &fb,
"framebuffer", NULL, 0);
"framebuffer", NULL, 0, 0);
if (err < 0) {
printf("failed to set carveout for %s: %d\n", node, err);
return err;

4
board/nvidia/p2771-0000/p2771-0000.c
View File

@ -105,7 +105,7 @@ static int ft_copy_carveout(void *dst, const void *src, const char *node)
int err;
err = fdtdec_get_carveout(src, node, "memory-region", 0, &fb, NULL,
NULL, NULL);
NULL, NULL, NULL);
if (err < 0) {
if (err != -FDT_ERR_NOTFOUND)
printf("failed to get carveout for %s: %d\n", node,
@ -115,7 +115,7 @@ static int ft_copy_carveout(void *dst, const void *src, const char *node)
}
err = fdtdec_set_carveout(dst, node, "memory-region", 0, &fb,
"framebuffer", NULL, 0);
"framebuffer", NULL, 0, 0);
if (err < 0) {
printf("failed to set carveout for %s: %d\n", node, err);
return err;

4
board/nvidia/p3450-0000/p3450-0000.c
View File

@ -128,7 +128,7 @@ static int ft_copy_carveout(void *dst, const void *src, const char *node)
int err;
err = fdtdec_get_carveout(src, node, "memory-region", 0, &fb, NULL,
NULL, NULL);
NULL, NULL, NULL);
if (err < 0) {
if (err != -FDT_ERR_NOTFOUND)
printf("failed to get carveout for %s: %d\n", node,
@ -138,7 +138,7 @@ static int ft_copy_carveout(void *dst, const void *src, const char *node)
}
err = fdtdec_set_carveout(dst, node, "memory-region", 0, &fb,
"framebuffer", NULL, 0);
"framebuffer", NULL, 0, 0);
if (err < 0) {
printf("failed to set carveout for %s: %d\n", node, err);
return err;

20
include/fdtdec.h
View File

@ -977,6 +977,9 @@ static inline int fdtdec_set_phandle(void *blob, int node, uint32_t phandle)
return fdt_setprop_u32(blob, node, "phandle", phandle);
}
/* add "no-map" property */
#define FDTDEC_RESERVED_MEMORY_NO_MAP (1 << 0)
/**
* fdtdec_add_reserved_memory() - add or find a reserved-memory node
*
@ -996,7 +999,7 @@ static inline int fdtdec_set_phandle(void *blob, int node, uint32_t phandle)
* uint32_t phandle;
*
* fdtdec_add_reserved_memory(fdt, "framebuffer", &fb, NULL, 0, &phandle,
* false);
* 0);
*
* This results in the following subnode being added to the top-level
* /reserved-memory node:
@ -1025,13 +1028,13 @@ static inline int fdtdec_set_phandle(void *blob, int node, uint32_t phandle)
* @param count number of compatible strings for the carveout region
* @param phandlep return location for the phandle of the carveout region
* can be NULL if no phandle should be added
* @param no_map add "no-map" property if true
* @param flags bitmask of flags to set for the carveout region
* @return 0 on success or a negative error code on failure
*/
int fdtdec_add_reserved_memory(void *blob, const char *basename,
const struct fdt_memory *carveout,
const char **compatibles, unsigned int count,
uint32_t *phandlep, bool no_map);
uint32_t *phandlep, unsigned long flags);
/**
* fdtdec_get_carveout() - reads a carveout from an FDT
@ -1048,13 +1051,15 @@ int fdtdec_add_reserved_memory(void *blob, const char *basename,
* @param carveout return location for the carveout information
* @param name return location for the carveout name
* @param compatiblesp return location for compatible strings
* @param countp return location for the number of compatible strings
* @param countp return location for the number of compatible strings
* @param flags return location for the flags of the carveout
* @return 0 on success or a negative error code on failure
*/
int fdtdec_get_carveout(const void *blob, const char *node,
const char *prop_name, unsigned int index,
struct fdt_memory *carveout, const char **name,
const char ***compatiblesp, unsigned int *countp);
const char ***compatiblesp, unsigned int *countp,
unsigned long *flags);
/**
* fdtdec_set_carveout() - sets a carveout region for a given node
@ -1073,7 +1078,7 @@ int fdtdec_get_carveout(const void *blob, const char *node,
* };
*
* fdtdec_set_carveout(fdt, node, "memory-region", 0, "framebuffer", NULL,
* 0, &fb);
* 0, &fb, 0);
*
* dc@54200000 is a display controller and was set up by the bootloader to
* scan out the framebuffer specified by "fb". This would cause the following
@ -1114,12 +1119,13 @@ int fdtdec_get_carveout(const void *blob, const char *node,
* @param name base name of the reserved-memory node to create
* @param compatibles compatible strings to set for the carveout
* @param count number of compatible strings
* @param flags bitmask of flags to set for the carveout
* @return 0 on success or a negative error code on failure
*/
int fdtdec_set_carveout(void *blob, const char *node, const char *prop_name,
unsigned int index, const struct fdt_memory *carveout,
const char *name, const char **compatibles,
unsigned int count);
unsigned int count, unsigned long flags);
/**
* Set up the device tree ready for use

28
lib/fdtdec.c
View File

@ -1294,7 +1294,7 @@ static int fdtdec_init_reserved_memory(void *blob)
int fdtdec_add_reserved_memory(void *blob, const char *basename,
const struct fdt_memory *carveout,
const char **compatibles, unsigned int count,
uint32_t *phandlep, bool no_map)
uint32_t *phandlep, unsigned long flags)
{
fdt32_t cells[4] = {}, *ptr = cells;
uint32_t upper, lower, phandle;
@ -1364,6 +1364,12 @@ int fdtdec_add_reserved_memory(void *blob, const char *basename,
if (node < 0)
return node;
if (flags & FDTDEC_RESERVED_MEMORY_NO_MAP) {
err = fdt_setprop(blob, node, "no-map", NULL, 0);
if (err < 0)
return err;
}
if (phandlep) {
err = fdt_generate_phandle(blob, &phandle);
if (err < 0)
@ -1394,12 +1400,6 @@ int fdtdec_add_reserved_memory(void *blob, const char *basename,
if (err < 0)
return err;
if (no_map) {
err = fdt_setprop(blob, node, "no-map", NULL, 0);
if (err < 0)
return err;
}
if (compatibles && count > 0) {
size_t length = 0, len = 0;
unsigned int i;
@ -1432,7 +1432,8 @@ int fdtdec_add_reserved_memory(void *blob, const char *basename,
int fdtdec_get_carveout(const void *blob, const char *node,
const char *prop_name, unsigned int index,
struct fdt_memory *carveout, const char **name,
const char ***compatiblesp, unsigned int *countp)
const char ***compatiblesp, unsigned int *countp,
unsigned long *flags)
{
const fdt32_t *prop;
uint32_t phandle;
@ -1519,13 +1520,20 @@ skip_compat:
carveout->end = carveout->start + size - 1;
if (flags) {
*flags = 0;
if (fdtdec_get_bool(blob, offset, "no-map"))
*flags |= FDTDEC_RESERVED_MEMORY_NO_MAP;
}
return 0;
}
int fdtdec_set_carveout(void *blob, const char *node, const char *prop_name,
unsigned int index, const struct fdt_memory *carveout,
const char *name, const char **compatibles,
unsigned int count)
unsigned int count, unsigned long flags)
{
uint32_t phandle;
int err, offset, len;
@ -1533,7 +1541,7 @@ int fdtdec_set_carveout(void *blob, const char *node, const char *prop_name,
void *prop;
err = fdtdec_add_reserved_memory(blob, name, carveout, compatibles,
count, &phandle, false);
count, &phandle, flags);
if (err < 0) {
debug("failed to add reserved memory: %d\n", err);
return err;

4
lib/fdtdec_test.c
View File

@ -190,7 +190,7 @@ static int make_fdt_carveout_device(void *fdt, uint32_t na, uint32_t ns)
CHECK(fdt_setprop(fdt, offset, "reg", cells, (na + ns) * sizeof(*cells)));
return fdtdec_set_carveout(fdt, name, "memory-region", 0, &carveout,
"framebuffer", NULL, 0);
"framebuffer", NULL, 0, 0);
}
static int check_fdt_carveout(void *fdt, uint32_t address_cells,
@ -215,7 +215,7 @@ static int check_fdt_carveout(void *fdt, uint32_t address_cells,
&expected.end, address_cells, size_cells);
CHECK(fdtdec_get_carveout(fdt, name, "memory-region", 0, &carveout,
NULL, NULL, NULL));
NULL, NULL, NULL, NULL));
if ((carveout.start != expected.start) ||
(carveout.end != expected.end)) {

3
lib/optee/optee.c
View File

@ -161,6 +161,7 @@ int optee_copy_fdt_nodes(void *new_blob)
.start = res.start,
.end = res.end,
};
unsigned long flags = FDTDEC_RESERVED_MEMORY_NO_MAP;
char *oldname, *nodename, *tmp;
oldname = strdup(name);
@ -178,7 +179,7 @@ int optee_copy_fdt_nodes(void *new_blob)
nodename,
&carveout,
NULL, 0,
NULL, true);
NULL, flags);
free(oldname);
if (ret < 0)

13
test/dm/fdtdec.c
View File

@ -29,17 +29,17 @@ static int dm_test_fdtdec_set_carveout(struct unit_test_state *uts)
resv.start = 0x1000;
resv.end = 0x2000;
ut_assertok(fdtdec_set_carveout(blob, "/a-test", "memory-region", 2,
&resv, "test_resv1", NULL, 0));
&resv, "test_resv1", NULL, 0, 0));
resv.start = 0x10000;
resv.end = 0x20000;
ut_assertok(fdtdec_set_carveout(blob, "/a-test", "memory-region", 1,
&resv, "test_resv2", NULL, 0));
&resv, "test_resv2", NULL, 0, 0));
resv.start = 0x100000;
resv.end = 0x200000;
ut_assertok(fdtdec_set_carveout(blob, "/a-test", "memory-region", 0,
&resv, "test_resv3", NULL, 0));
&resv, "test_resv3", NULL, 0, 0));
offset = fdt_path_offset(blob, "/a-test");
ut_assert(offset > 0);
@ -64,6 +64,7 @@ static int dm_test_fdtdec_add_reserved_memory(struct unit_test_state *uts)
fdt_addr_t addr;
fdt_size_t size;
void *blob;
unsigned long flags = FDTDEC_RESERVED_MEMORY_NO_MAP;
int blob_sz, parent, subnode;
uint32_t phandle, phandle1;
@ -78,7 +79,7 @@ static int dm_test_fdtdec_add_reserved_memory(struct unit_test_state *uts)
resv.start = 0x1000;
resv.end = 0x1fff;
ut_assertok(fdtdec_add_reserved_memory(blob, "rsvd_region", &resv,
NULL, 0, &phandle, false));
NULL, 0, &phandle, 0));
/* Test /reserve-memory and its subnode should exist */
parent = fdt_path_offset(blob, "/reserved-memory");
@ -99,7 +100,7 @@ static int dm_test_fdtdec_add_reserved_memory(struct unit_test_state *uts)
resv.start = 0x2000;
resv.end = 0x2fff;
ut_assertok(fdtdec_add_reserved_memory(blob, "rsvd_region1", &resv,
NULL, 0, &phandle1, true));
NULL, 0, &phandle1, flags));
subnode = fdt_path_offset(blob, "/reserved-memory/rsvd_region1");
ut_assert(subnode > 0);
@ -116,7 +117,7 @@ static int dm_test_fdtdec_add_reserved_memory(struct unit_test_state *uts)
resv.start = 0x1000;
resv.end = 0x1fff;
ut_assertok(fdtdec_add_reserved_memory(blob, "rsvd_region2", &resv,
NULL, 0, &phandle1, false));
NULL, 0, &phandle1, 0));
subnode = fdt_path_offset(blob, "/reserved-memory/rsvd_region2");
ut_assert(subnode < 0);