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lib: utils/ipi: Use fdt_driver for initialization

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The ipi driver subsystem does not need any extra data, so it can use
`struct fdt_driver` directly. The generic fdt_ipi_init() performs a
best-effort initialization of all matching DT nodes.

Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Samuel Holland
2024-11-11 14:02:51 -08:00
committed by Anup Patel
parent 333133edaa
commit 5fa510c5f6
5 changed files with 10 additions and 48 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
include/sbi_utils/ipi/fdt_ipi.h
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@@ -11,14 +11,10 @@
#define __FDT_IPI_H__
#include <sbi/sbi_types.h>
#include <sbi_utils/fdt/fdt_driver.h>
#ifdef CONFIG_FDT_IPI
struct fdt_ipi {
const struct fdt_match *match_table;
int (*cold_init)(const void *fdt, int nodeoff, const struct fdt_match *match);
};
int fdt_ipi_init(void);
#else

42
lib/utils/ipi/fdt_ipi.c
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@@ -7,50 +7,16 @@
* Anup Patel <anup.patel@wdc.com>
*/
#include <sbi/sbi_error.h>
#include <sbi/sbi_scratch.h>
#include <sbi_utils/fdt/fdt_helper.h>
#include <sbi_utils/ipi/fdt_ipi.h>
/* List of FDT ipi drivers generated at compile time */
extern struct fdt_ipi *const fdt_ipi_drivers[];
extern const struct fdt_driver *const fdt_ipi_drivers[];
int fdt_ipi_init(void)
{
int pos, noff, rc;
struct fdt_ipi *drv;
const struct fdt_match *match;
const void *fdt = fdt_get_address();
for (pos = 0; fdt_ipi_drivers[pos]; pos++) {
drv = fdt_ipi_drivers[pos];
noff = -1;
while ((noff = fdt_find_match(fdt, noff,
drv->match_table, &match)) >= 0) {
if (!fdt_node_is_enabled(fdt, noff))
continue;
/* drv->cold_init must not be NULL */
if (drv->cold_init == NULL)
return SBI_EFAIL;
rc = drv->cold_init(fdt, noff, match);
if (rc == SBI_ENODEV)
continue;
if (rc)
return rc;
/*
* We will have multiple IPI devices on multi-die or
* multi-socket systems so we cannot break here.
*/
}
}
/*
* On some single-hart system there is no need for ipi,
* so we cannot return a failure here
* On some single-hart system there is no need for IPIs,
* so do not return a failure if no device is found.
*/
return 0;
return fdt_driver_init_all(fdt_get_address(), fdt_ipi_drivers);
}

2
lib/utils/ipi/fdt_ipi_drivers.carray
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@@ -1,3 +1,3 @@
HEADER: sbi_utils/ipi/fdt_ipi.h
TYPE: struct fdt_ipi
TYPE: const struct fdt_driver
NAME: fdt_ipi_drivers

4
lib/utils/ipi/fdt_ipi_mswi.c
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@@ -61,7 +61,7 @@ static const struct fdt_match ipi_mswi_match[] = {
{ },
};
struct fdt_ipi fdt_ipi_mswi = {
const struct fdt_driver fdt_ipi_mswi = {
.match_table = ipi_mswi_match,
.cold_init = ipi_mswi_cold_init,
.init = ipi_mswi_cold_init,
};

4
lib/utils/ipi/fdt_ipi_plicsw.c
View File

@@ -39,7 +39,7 @@ static const struct fdt_match ipi_plicsw_match[] = {
{},
};
struct fdt_ipi fdt_ipi_plicsw = {
const struct fdt_driver fdt_ipi_plicsw = {
.match_table = ipi_plicsw_match,
.cold_init = fdt_plicsw_cold_ipi_init,
.init = fdt_plicsw_cold_ipi_init,
};