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/*
* Copyright (c) 2017-2018, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/firmware.h>
#include <nvgpu/kmem.h>
#include <nvgpu/bug.h>
#include <nvgpu/firmware.h>
#include <nvgpu/gk20a.h>
#include "platform_gk20a.h"
#include "os_linux.h"
static const struct firmware *do_request_firmware(struct device *dev,
const char *prefix, const char *fw_name, int flags)
{
const struct firmware *fw;
char *fw_path = NULL;
int path_len, err;
if (prefix) {
path_len = strlen(prefix) + strlen(fw_name);
path_len += 2; /* for the path separator and zero terminator*/
fw_path = nvgpu_kzalloc(get_gk20a(dev),
sizeof(*fw_path) * path_len);
if (!fw_path)
return NULL;
sprintf(fw_path, "%s/%s", prefix, fw_name);
fw_name = fw_path;
}
if (flags & NVGPU_REQUEST_FIRMWARE_NO_WARN)
err = request_firmware_direct(&fw, fw_name, dev);
else
err = request_firmware(&fw, fw_name, dev);
nvgpu_kfree(get_gk20a(dev), fw_path);
if (err)
return NULL;
return fw;
}
/* This is a simple wrapper around request_firmware that takes 'fw_name' and
* applies an IP specific relative path prefix to it. The caller is
* responsible for calling nvgpu_release_firmware later. */
struct nvgpu_firmware *nvgpu_request_firmware(struct gk20a *g,
const char *fw_name,
int flags)
{
struct device *dev = dev_from_gk20a(g);
struct nvgpu_firmware *fw;
const struct firmware *linux_fw;
/* current->fs is NULL when calling from SYS_EXIT.
Add a check here to prevent crash in request_firmware */
if (!current->fs || !fw_name)
return NULL;
fw = nvgpu_kzalloc(g, sizeof(*fw));
if (!fw)
return NULL;
linux_fw = do_request_firmware(dev, g->name, fw_name, flags);
#ifdef CONFIG_TEGRA_GK20A
/* TO BE REMOVED - Support loading from legacy SOC specific path. */
if (!linux_fw && !(flags & NVGPU_REQUEST_FIRMWARE_NO_SOC)) {
struct gk20a_platform *platform = gk20a_get_platform(dev);
linux_fw = do_request_firmware(dev,
platform->soc_name, fw_name, flags);
}
#endif
if (!linux_fw)
goto err;
fw->data = nvgpu_kmalloc(g, linux_fw->size);
if (!fw->data)
goto err_release;
memcpy(fw->data, linux_fw->data, linux_fw->size);
fw->size = linux_fw->size;
release_firmware(linux_fw);
return fw;
err_release:
release_firmware(linux_fw);
err:
nvgpu_kfree(g, fw);
return NULL;
}
void nvgpu_release_firmware(struct gk20a *g, struct nvgpu_firmware *fw)
{
if(!fw)
return;
nvgpu_kfree(g, fw->data);
nvgpu_kfree(g, fw);
}
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