mirror of
https://github.com/torvalds/linux.git
synced 2024-11-25 05:32:00 +00:00
7029e78302
On 32-bit machines with 64-bit resource_size_t, the driver causes
a link failure because of the 64-bit division:
arm-linux-gnueabi-ld: drivers/remoteproc/qcom_pil_info.o: in function `qcom_pil_info_store':
qcom_pil_info.c:(.text+0x1ec): undefined reference to `__aeabi_uldivmod'
Add a cast to an u32 to avoid this. If the resource exceeds 4GB,
there are bigger problems.
Fixes: 549b67da66 ("remoteproc: qcom: Introduce helper to store pil info in IMEM")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20210103135628.3702427-1-arnd@kernel.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
130 lines
3.0 KiB
C
130 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright (c) 2019-2020 Linaro Ltd.
|
|
*/
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/of_address.h>
|
|
#include "qcom_pil_info.h"
|
|
|
|
/*
|
|
* The PIL relocation information region is used to communicate memory regions
|
|
* occupied by co-processor firmware for post mortem crash analysis.
|
|
*
|
|
* It consists of an array of entries with an 8 byte textual identifier of the
|
|
* region followed by a 64 bit base address and 32 bit size, both little
|
|
* endian.
|
|
*/
|
|
#define PIL_RELOC_NAME_LEN 8
|
|
#define PIL_RELOC_ENTRY_SIZE (PIL_RELOC_NAME_LEN + sizeof(__le64) + sizeof(__le32))
|
|
|
|
struct pil_reloc {
|
|
void __iomem *base;
|
|
size_t num_entries;
|
|
};
|
|
|
|
static struct pil_reloc _reloc __read_mostly;
|
|
static DEFINE_MUTEX(pil_reloc_lock);
|
|
|
|
static int qcom_pil_info_init(void)
|
|
{
|
|
struct device_node *np;
|
|
struct resource imem;
|
|
void __iomem *base;
|
|
int ret;
|
|
|
|
/* Already initialized? */
|
|
if (_reloc.base)
|
|
return 0;
|
|
|
|
np = of_find_compatible_node(NULL, NULL, "qcom,pil-reloc-info");
|
|
if (!np)
|
|
return -ENOENT;
|
|
|
|
ret = of_address_to_resource(np, 0, &imem);
|
|
of_node_put(np);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
base = ioremap(imem.start, resource_size(&imem));
|
|
if (!base) {
|
|
pr_err("failed to map PIL relocation info region\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
memset_io(base, 0, resource_size(&imem));
|
|
|
|
_reloc.base = base;
|
|
_reloc.num_entries = (u32)resource_size(&imem) / PIL_RELOC_ENTRY_SIZE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* qcom_pil_info_store() - store PIL information of image in IMEM
|
|
* @image: name of the image
|
|
* @base: base address of the loaded image
|
|
* @size: size of the loaded image
|
|
*
|
|
* Return: 0 on success, negative errno on failure
|
|
*/
|
|
int qcom_pil_info_store(const char *image, phys_addr_t base, size_t size)
|
|
{
|
|
char buf[PIL_RELOC_NAME_LEN];
|
|
void __iomem *entry;
|
|
int ret;
|
|
int i;
|
|
|
|
mutex_lock(&pil_reloc_lock);
|
|
ret = qcom_pil_info_init();
|
|
if (ret < 0) {
|
|
mutex_unlock(&pil_reloc_lock);
|
|
return ret;
|
|
}
|
|
|
|
for (i = 0; i < _reloc.num_entries; i++) {
|
|
entry = _reloc.base + i * PIL_RELOC_ENTRY_SIZE;
|
|
|
|
memcpy_fromio(buf, entry, PIL_RELOC_NAME_LEN);
|
|
|
|
/*
|
|
* An empty record means we didn't find it, given that the
|
|
* records are packed.
|
|
*/
|
|
if (!buf[0])
|
|
goto found_unused;
|
|
|
|
if (!strncmp(buf, image, PIL_RELOC_NAME_LEN))
|
|
goto found_existing;
|
|
}
|
|
|
|
pr_warn("insufficient PIL info slots\n");
|
|
mutex_unlock(&pil_reloc_lock);
|
|
return -ENOMEM;
|
|
|
|
found_unused:
|
|
memcpy_toio(entry, image, PIL_RELOC_NAME_LEN);
|
|
found_existing:
|
|
/* Use two writel() as base is only aligned to 4 bytes on odd entries */
|
|
writel(base, entry + PIL_RELOC_NAME_LEN);
|
|
writel((u64)base >> 32, entry + PIL_RELOC_NAME_LEN + 4);
|
|
writel(size, entry + PIL_RELOC_NAME_LEN + sizeof(__le64));
|
|
mutex_unlock(&pil_reloc_lock);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(qcom_pil_info_store);
|
|
|
|
static void __exit pil_reloc_exit(void)
|
|
{
|
|
mutex_lock(&pil_reloc_lock);
|
|
iounmap(_reloc.base);
|
|
_reloc.base = NULL;
|
|
mutex_unlock(&pil_reloc_lock);
|
|
}
|
|
module_exit(pil_reloc_exit);
|
|
|
|
MODULE_DESCRIPTION("Qualcomm PIL relocation info");
|
|
MODULE_LICENSE("GPL v2");
|