/*
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* Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
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* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
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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 "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* 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 NONINFRINGEMENT. IN NO EVENT SHALL
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* PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#pragma once
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#include_next <xf86drm.h>
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#include <string.h>
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#include <errno.h>
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/*
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* FIXME: Below code comes from https://patchwork.kernel.org/patch/10368203/
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* FIXME: Remove or rework once that has been merged
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*/
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typedef enum drm_match_key {
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/* Match against DRM_NODE_{PRIMARY,RENDER,...} type */
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DRM_MATCH_NODE_TYPE = 1,
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DRM_MATCH_DRIVER_NAME = 2,
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DRM_MATCH_BUS_PCI_VENDOR = 3,
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DRM_MATCH_FUNCTION = 4,
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} drm_match_key_t;
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typedef struct drm_match_func {
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void *data;
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int (*fp)(int, void*); /* Intended arguments are fp(fd, data) */
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} drm_match_func_t;
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typedef struct drm_match {
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drm_match_key_t type;
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union {
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int s;
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uint16_t u16;
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char *str;
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drm_match_func_t func;
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};
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} drm_match_t;
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static inline int drmHandleMatch(int fd, drm_match_t *filters, int nbr_filters)
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{
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if (fd < 0)
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goto error;
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if (nbr_filters > 0 && filters == NULL)
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goto error;
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drmVersionPtr ver = drmGetVersion(fd);
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if (!ver)
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goto fail;
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drmDevicePtr dev = NULL;
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if (drmGetDevice2(fd, 0, &dev) != 0) {
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goto fail;
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}
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for (int i = 0; i < nbr_filters; i++) {
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drm_match_t *f = &filters[i];
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switch (f->type) {
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case DRM_MATCH_NODE_TYPE:
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if (!(dev->available_nodes & (1 << f->s)))
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goto fail;
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break;
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case DRM_MATCH_DRIVER_NAME:
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if (!f->str)
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goto error;
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/* This bypass is used by when the driver name is used
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by the Android property_get() func, when it hasn't found
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the property and the string is empty as a result. */
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if (strlen(f->str) == 0)
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continue;
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if (strncmp(ver->name, f->str, strlen(ver->name)))
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goto fail;
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break;
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case DRM_MATCH_BUS_PCI_VENDOR:
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if (dev->bustype != DRM_BUS_PCI)
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goto fail;
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if (dev->deviceinfo.pci->vendor_id != f->u16)
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goto fail;
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break;
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case DRM_MATCH_FUNCTION:
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if (!f->func.fp)
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goto error;
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int (*fp)(int, void*) = f->func.fp;
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void *data = f->func.data;
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if (!fp(fd, data))
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goto fail;
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break;
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default:
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goto error;
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}
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}
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success:
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drmFreeVersion(ver);
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drmFreeDevice(&dev);
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return 0;
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error:
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drmFreeVersion(ver);
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drmFreeDevice(&dev);
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return -EINVAL;
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fail:
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drmFreeVersion(ver);
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drmFreeDevice(&dev);
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return 1;
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}
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