forked from Imagelibrary/rtems
62 lines
1.3 KiB
C
62 lines
1.3 KiB
C
/* PCI Help Function, iterate over all PCI devices. Find devices by cfg access.
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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.h>
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#include <pci/access.h>
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/*#define DEBUG*/
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#ifdef DEBUG
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#include <rtems/bspIo.h>
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#define DBG(args...) printk(args)
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#else
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#define DBG(args...)
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#endif
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int pci_for_each(int (*func)(pci_dev_t, void*), void *arg)
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{
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uint32_t id;
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uint8_t hd;
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int bus, dev, fun, result, fail;
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int maxbus = pci_bus_count();
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pci_dev_t pcidev;
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for (bus = 0; bus < maxbus ; bus++) {
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for (dev = 0; dev <= PCI_SLOTMAX; dev++) {
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pcidev = PCI_DEV(bus, dev, 0);
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for (fun = 0; fun <= PCI_FUNCMAX; fun++, pcidev++) {
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fail = pci_cfg_r32(pcidev, PCIR_VENDOR, &id);
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if (fail || (0xffffffff == id) || (0 == id)) {
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if (fun == 0)
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break;
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else
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continue;
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}
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DBG("pcibus_for_each: found 0x%08lx at"
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" %d/%d/%d\n", id, bus, dev, fun);
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result = func(pcidev, arg);
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if (result != 0)
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return result; /* Stopped */
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/* Stop if not a multi-function device */
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if (fun == 0) {
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pci_cfg_r8(pcidev, PCIR_HDRTYPE,
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&hd);
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if ((hd & PCIM_MFDEV) == 0)
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break;
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}
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}
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}
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}
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return 0; /* scanned all */
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}
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