From 2a2c16af5f9f1ccfc93a13e820d5381e5c881e92 Mon Sep 17 00:00:00 2001 From: Terje Bergstrom Date: Wed, 18 Apr 2018 12:59:00 -0700 Subject: gpu: nvgpu: Move Linux files away from common Move all Linux source code files to drivers/gpu/nvgpu/os/linux from drivers/gpu/nvgpu/common/linux. This changes the meaning of common to be OS independent. JIRA NVGPU-598 JIRA NVGPU-601 Change-Id: Ib7f2a43d3688bb0d0b7dcc48469a6783fd988ce9 Signed-off-by: Terje Bergstrom Reviewed-on: https://git-master.nvidia.com/r/1747714 Reviewed-by: mobile promotions Tested-by: mobile promotions --- drivers/gpu/nvgpu/os/linux/firmware.c | 117 ++++++++++++++++++++++++++++++++++ 1 file changed, 117 insertions(+) create mode 100644 drivers/gpu/nvgpu/os/linux/firmware.c (limited to 'drivers/gpu/nvgpu/os/linux/firmware.c') diff --git a/drivers/gpu/nvgpu/os/linux/firmware.c b/drivers/gpu/nvgpu/os/linux/firmware.c new file mode 100644 index 00000000..9a4dc653 --- /dev/null +++ b/drivers/gpu/nvgpu/os/linux/firmware.c @@ -0,0 +1,117 @@ +/* + * 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 . + */ + +#include + +#include +#include +#include + +#include "gk20a/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); +} -- cgit v1.2.2