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drm/nouveau/core: add firmware handling functions

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Add two functions nvkm_firmware_get() and nvkm_firmware_put() to load a
firmware file and free its resources, respectively. Since firmware files
are becoming a necessity for new GPUs, and their location has been
standardized to nvidia/chip/, this will prevent duplicate and
error-prone name-generation code.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Alexandre Courbot 2016-01-18 15:07:09 +09:00 committed by Ben Skeggs
parent f0db6e3be9
commit 046fdb2a59
3 changed files with 73 additions and 0 deletions
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11
drivers/gpu/drm/nouveau/include/nvkm/core/firmware.h Normal file
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@ -0,0 +1,11 @@
#ifndef __NVKM_FIRMWARE_H__
#define __NVKM_FIRMWARE_H__
#include <core/device.h>
int nvkm_firmware_get(struct nvkm_device *device, const char *fwname,
const struct firmware **fw);
void nvkm_firmware_put(const struct firmware *fw);
#endif

1
drivers/gpu/drm/nouveau/nvkm/core/Kbuild
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@ -2,6 +2,7 @@ nvkm-y := nvkm/core/client.o
nvkm-y += nvkm/core/engine.o
nvkm-y += nvkm/core/enum.o
nvkm-y += nvkm/core/event.o
nvkm-y += nvkm/core/firmware.o
nvkm-y += nvkm/core/gpuobj.o
nvkm-y += nvkm/core/ioctl.o
nvkm-y += nvkm/core/memory.o

61
drivers/gpu/drm/nouveau/nvkm/core/firmware.c Normal file
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@ -0,0 +1,61 @@
/*
* Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include <core/device.h>
/**
* nvkm_firmware_get - load firmware from the official nvidia/chip/ directory
* @device device that will use that firmware
* @fwname name of firmware file to load
* @fw firmware structure to load to
*
* Use this function to load firmware files in the form nvidia/chip/fwname.bin.
* Firmware files released by NVIDIA will always follow this format.
*/
int
nvkm_firmware_get(struct nvkm_device *device, const char *fwname,
const struct firmware **fw)
{
char f[64];
char cname[16];
int i;
/* Convert device name to lowercase */
strncpy(cname, device->chip->name, sizeof(cname));
cname[sizeof(cname) - 1] = '\0';
i = strlen(cname);
while (i) {
--i;
cname[i] = tolower(cname[i]);
}
snprintf(f, sizeof(f), "nvidia/%s/%s.bin", cname, fwname);
return request_firmware(fw, f, device->dev);
}
/**
* nvkm_firmware_put - release firmware loaded with nvkm_firmware_get
*/
void
nvkm_firmware_put(const struct firmware *fw)
{
release_firmware(fw);
}