89e84aa78c
We used to simply probe every GPU that is reported by the kernel. However, if a system has multiple GPUs that share display controllers, we cannot use both simultaneously. Unfortunately, the kernel currently does not notify us about this. Hence, we use some heuristics to determine which GPU is the boot-gpu/primary-gpu. This only adds the detection logic, it does not modify any code to use this detection at all. Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
/*
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* uterm - Linux User-Space Terminal
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*
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* Copyright (c) 2012 David Herrmann <dh.herrmann@googlemail.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files
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* (the "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, sublicense, 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 shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/*
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* PCI Helpers
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* This uses the pciaccess library to retrieve information from the PCI bus.
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*/
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#ifndef UTERM_PCI_H
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#define UTERM_PCI_H
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#include <stdlib.h>
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#include "uterm.h"
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#ifdef BUILD_ENABLE_PCIACCESS
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int uterm_pci_get_primary_id(char **out);
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#else
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static inline int uterm_pci_get_primary_id(char **out)
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{
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return -EOPNOTSUPP;
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}
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#endif
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#endif /* UTERM_PCI_H */
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