forked from Imagelibrary/rtems
41 lines
962 B
C
41 lines
962 B
C
/* PCI Help function, iterate all PCI device children of PCI bus.
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*
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* COPYRIGHT (c) 2010 Cobham Gaisler AB.
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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*/
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#include <pci/cfg.h>
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/* Iterate over all PCI devices on a bus (not child buses) and call func(),
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* iteration is stopped if a non-zero value is returned by func().
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*
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* search options: 0 (no child buses), 1 (depth first), 2 (breadth first)
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*/
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int pci_for_each_child(
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struct pci_bus *bus,
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int (*func)(struct pci_dev *, void *arg),
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void *arg,
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int search)
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{
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struct pci_dev *dev = bus->devs;
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int ret;
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while (dev) {
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ret = func(dev, arg);
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if (ret)
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return ret;
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if (search == SEARCH_DEPTH && (dev->flags & PCI_DEV_BRIDGE)) {
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ret = pci_for_each_child((struct pci_bus *)dev,
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func, arg, search);
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if (ret)
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return ret;
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}
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dev = dev->next;
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}
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return 0;
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}
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