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From:   viktor.barna@celeno.com
To:     linux-wireless@vger.kernel.org
Cc:     Kalle Valo <kvalo@codeaurora.org>,
        "David S . Miller" <davem@davemloft.net>,
        Jakub Kicinski <kuba@kernel.org>,
        Aviad Brikman <aviad.brikman@celeno.com>,
        Eliav Farber <eliav.farber@gmail.com>,
        Oleksandr Savchenko <oleksandr.savchenko@celeno.com>,
        Shay Bar <shay.bar@celeno.com>,
        Viktor Barna <viktor.barna@celeno.com>
Subject: [RFC v1 220/256] cl8k: add utils/file.c
Date:   Thu, 17 Jun 2021 16:01:47 +0000
Message-Id: <20210617160223.160998-221-viktor.barna@celeno.com>
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From: Viktor Barna <viktor.barna@celeno.com>

(Part of the split. Please, take a look at the cover letter for more
details).

Signed-off-by: Viktor Barna <viktor.barna@celeno.com>
---
 drivers/net/wireless/celeno/cl8k/utils/file.c | 52 +++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 drivers/net/wireless/celeno/cl8k/utils/file.c

diff --git a/drivers/net/wireless/celeno/cl8k/utils/file.c b/drivers/net/wi=
reless/celeno/cl8k/utils/file.c
new file mode 100644
index 000000000000..b42d78f386e4
--- /dev/null
+++ b/drivers/net/wireless/celeno/cl8k/utils/file.c
@@ -0,0 +1,52 @@
+// SPDX-License-Identifier: MIT
+/* Copyright(c) 2019-2021, Celeno Communications Ltd. */
+
+#include "utils/file.h"
+#include "reg/reg_access.h"
+#include <linux/firmware.h>
+#include <linux/fs.h>
+#include <linux/vmalloc.h>
+
+size_t cl_file_open_and_read(struct cl_chip *chip, const char *filename,
+                            char **buf)
+{
+       const struct firmware *fw;
+       size_t size =3D 0;
+       int ret =3D 0;
+       char path_name[CL_PATH_MAX] =3D {0};
+
+       snprintf(path_name, sizeof(path_name), "cl8k/%s", filename);
+       ret =3D request_firmware(&fw, path_name, chip->dev);
+
+       if (ret) {
+               cl_dbg_chip_err(chip, "request_firmware %s failed\n",
+                               path_name);
+               return 0;
+       }
+
+       if (!fw || !fw->data) {
+               cl_dbg_chip_err(chip, "Invalid firmware %s\n", path_name);
+               goto out;
+       }
+
+       size =3D fw->size;
+
+       /*
+        * Add one byte with a '\0' so that string manipulation functions
+        * used for parsing these files can find the string '\0' terminator=
.
+        * Make sure size is aligned to 4.
+        */
+       *buf =3D kzalloc(ALIGN(size + 1, 4), GFP_KERNEL);
+       if (!(*buf)) {
+               size =3D 0;
+               goto out;
+       }
+
+       memcpy(*buf, fw->data, size);
+
+out:
+       release_firmware(fw);
+
+       return size;
+}
+
--
2.30.0

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