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bab823973b
Use dev_from_gk20a() accessor whenever accessing struct device * from struct gk20a. JIRA NVGPU-38 Change-Id: Ide9fca3a56436c8f62e7872580a766c4c1e2353e Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com> Reviewed-on: https://git-master/r/1507930 Reviewed-by: Automatic_Commit_Validation_User GVS: Gerrit_Virtual_Submit
118 lines
3.1 KiB
C
118 lines
3.1 KiB
C
/*
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* Copyright (c) 2017, NVIDIA CORPORATION. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/firmware.h>
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#include <nvgpu/kmem.h>
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#include <nvgpu/bug.h>
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#include <nvgpu/firmware.h>
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#include "gk20a/gk20a.h"
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#include "gk20a/platform_gk20a.h"
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static const struct firmware *do_request_firmware(struct device *dev,
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const char *prefix, const char *fw_name, int flags)
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{
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const struct firmware *fw;
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char *fw_path = NULL;
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int path_len, err;
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if (prefix) {
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path_len = strlen(prefix) + strlen(fw_name);
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path_len += 2; /* for the path separator and zero terminator*/
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fw_path = nvgpu_kzalloc(get_gk20a(dev),
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sizeof(*fw_path) * path_len);
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if (!fw_path)
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return NULL;
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sprintf(fw_path, "%s/%s", prefix, fw_name);
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fw_name = fw_path;
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}
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#if LINUX_VERSION_CODE < KERNEL_VERSION(3,18,0)
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err = request_firmware(&fw, fw_name, dev);
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#else
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if (flags & NVGPU_REQUEST_FIRMWARE_NO_WARN)
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err = request_firmware_direct(&fw, fw_name, dev);
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else
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err = request_firmware(&fw, fw_name, dev);
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#endif
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nvgpu_kfree(get_gk20a(dev), fw_path);
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if (err)
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return NULL;
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return fw;
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}
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/* This is a simple wrapper around request_firmware that takes 'fw_name' and
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* applies an IP specific relative path prefix to it. The caller is
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* responsible for calling nvgpu_release_firmware later. */
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struct nvgpu_firmware *nvgpu_request_firmware(struct gk20a *g,
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const char *fw_name,
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int flags)
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{
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struct device *dev = dev_from_gk20a(g);
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struct nvgpu_firmware *fw;
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const struct firmware *linux_fw;
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/* current->fs is NULL when calling from SYS_EXIT.
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Add a check here to prevent crash in request_firmware */
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if (!current->fs || !fw_name)
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return NULL;
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fw = nvgpu_kzalloc(g, sizeof(*fw));
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if (!fw)
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return NULL;
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linux_fw = do_request_firmware(dev, g->name, fw_name, flags);
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#ifdef CONFIG_TEGRA_GK20A
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/* TO BE REMOVED - Support loading from legacy SOC specific path. */
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if (!linux_fw && !(flags & NVGPU_REQUEST_FIRMWARE_NO_SOC)) {
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struct gk20a_platform *platform = gk20a_get_platform(dev);
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linux_fw = do_request_firmware(dev,
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platform->soc_name, fw_name, flags);
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}
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#endif
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if (!linux_fw)
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goto err;
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fw->data = nvgpu_kmalloc(g, linux_fw->size);
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if (!fw->data)
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goto err_release;
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memcpy(fw->data, linux_fw->data, linux_fw->size);
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fw->size = linux_fw->size;
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release_firmware(linux_fw);
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return fw;
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err_release:
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release_firmware(linux_fw);
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err:
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nvgpu_kfree(g, fw);
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return NULL;
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}
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void nvgpu_release_firmware(struct gk20a *g, struct nvgpu_firmware *fw)
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{
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nvgpu_kfree(g, fw->data);
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nvgpu_kfree(g, fw);
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}
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