89 lines
2.5 KiB
C
89 lines
2.5 KiB
C
/**************************************************************************
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*
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* Copyright © 2009 VMware, Inc., Palo Alto, CA., USA
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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* USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/*
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* Thanks to krh and jcristau for the tips on
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* going from fd to pci id via fstat and udev.
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*/
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#include <errno.h>
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#include <stdio.h>
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#include <xf86drm.h>
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#include <sys/stat.h>
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#include "internal.h"
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#define LIBUDEV_I_KNOW_THE_API_IS_SUBJECT_TO_CHANGE
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#include <libudev.h>
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int linux_get_pciid_from_fd(int fd, unsigned *vendor_id, unsigned *chip_id)
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{
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struct udev *udev;
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struct udev_device *device;
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struct udev_device *parent;
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const char *pci_id;
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struct stat buffer;
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int ret;
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ret = fstat(fd, &buffer);
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if (ret)
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return -EINVAL;
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if (!S_ISCHR(buffer.st_mode))
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return -EINVAL;
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udev = udev_new();
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if (!udev)
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return -ENOMEM;
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device = udev_device_new_from_devnum(udev, 'c', buffer.st_rdev);
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if (!device)
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goto err_free_udev;
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parent = udev_device_get_parent(device);
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if (!parent)
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goto err_free_device;
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pci_id = udev_device_get_property_value(parent, "PCI_ID");
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if (!pci_id)
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goto err_free_device;
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if (sscanf(pci_id, "%x:%x", vendor_id, chip_id) != 2)
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goto err_free_device;
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udev_device_unref(device);
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udev_unref(udev);
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return 0;
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err_free_device:
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udev_device_unref(device);
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err_free_udev:
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udev_unref(udev);
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return -EINVAL;
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}
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