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      1 /*	$NetBSD: nouveau_nvkm_core_firmware.c,v 1.2 2021/12/18 23:45:34 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the "Software"),
      8  * to deal in the Software without restriction, including without limitation
      9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     10  * and/or sell copies of the Software, and to permit persons to whom the
     11  * Software is furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice shall be included in
     14  * all copies or substantial portions of the Software.
     15  *
     16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
     21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
     22  * DEALINGS IN THE SOFTWARE.
     23  */
     24 #include <sys/cdefs.h>
     25 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_core_firmware.c,v 1.2 2021/12/18 23:45:34 riastradh Exp $");
     26 
     27 #include <core/device.h>
     28 #include <core/firmware.h>
     29 
     30 int
     31 nvkm_firmware_load_name(const struct nvkm_subdev *subdev, const char *base,
     32 			const char *name, int ver, const struct firmware **pfw)
     33 {
     34 	char path[64];
     35 	int ret;
     36 
     37 	snprintf(path, sizeof(path), "%s%s", base, name);
     38 	ret = nvkm_firmware_get(subdev, path, ver, pfw);
     39 	if (ret < 0)
     40 		return ret;
     41 
     42 	return 0;
     43 }
     44 
     45 int
     46 nvkm_firmware_load_blob(const struct nvkm_subdev *subdev, const char *base,
     47 			const char *name, int ver, struct nvkm_blob *blob)
     48 {
     49 	const struct firmware *fw;
     50 	int ret;
     51 
     52 	ret = nvkm_firmware_load_name(subdev, base, name, ver, &fw);
     53 	if (ret == 0) {
     54 		blob->data = kmemdup(fw->data, fw->size, GFP_KERNEL);
     55 		blob->size = fw->size;
     56 		nvkm_firmware_put(fw);
     57 		if (!blob->data)
     58 			return -ENOMEM;
     59 	}
     60 
     61 	return ret;
     62 }
     63 
     64 /**
     65  * nvkm_firmware_get - load firmware from the official nvidia/chip/ directory
     66  * @subdev	subdevice that will use that firmware
     67  * @fwname	name of firmware file to load
     68  * @fw		firmware structure to load to
     69  *
     70  * Use this function to load firmware files in the form nvidia/chip/fwname.bin.
     71  * Firmware files released by NVIDIA will always follow this format.
     72  */
     73 int
     74 nvkm_firmware_get(const struct nvkm_subdev *subdev, const char *fwname, int ver,
     75 		  const struct firmware **fw)
     76 {
     77 	struct nvkm_device *device = subdev->device;
     78 	char f[64];
     79 	char cname[16];
     80 	int i;
     81 
     82 	/* Convert device name to lowercase */
     83 	strncpy(cname, device->chip->name, sizeof(cname));
     84 	cname[sizeof(cname) - 1] = '\0';
     85 	i = strlen(cname);
     86 	while (i) {
     87 		--i;
     88 		cname[i] = tolower(cname[i]);
     89 	}
     90 
     91 	if (ver != 0)
     92 		snprintf(f, sizeof(f), "nvidia/%s/%s-%d.bin", cname, fwname, ver);
     93 	else
     94 		snprintf(f, sizeof(f), "nvidia/%s/%s.bin", cname, fwname);
     95 
     96 	if (!firmware_request_nowarn(fw, f, device->dev)) {
     97 		nvkm_debug(subdev, "firmware \"%s\" loaded - %zu byte(s)\n",
     98 			   f, (*fw)->size);
     99 		return 0;
    100 	}
    101 
    102 	nvkm_debug(subdev, "firmware \"%s\" unavailable\n", f);
    103 	return -ENOENT;
    104 }
    105 
    106 /**
    107  * nvkm_firmware_put - release firmware loaded with nvkm_firmware_get
    108  */
    109 void
    110 nvkm_firmware_put(const struct firmware *fw)
    111 {
    112 	release_firmware(fw);
    113 }
    114