1 | /* PCI Help Function, iterate over all PCI devices. Find devices by cfg access. |
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2 | * |
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3 | * COPYRIGHT (c) 2010 Cobham Gaisler AB. |
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4 | * |
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5 | * The license and distribution terms for this file may be |
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6 | * found in the file LICENSE in this distribution or at |
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7 | * http://www.rtems.com/license/LICENSE. |
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8 | */ |
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9 | |
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10 | #include <pci.h> |
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11 | #include <pci/access.h> |
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12 | |
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13 | /*#define DEBUG*/ |
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14 | |
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15 | #ifdef DEBUG |
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16 | #include <rtems/bspIo.h> |
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17 | #define DBG(args...) printk(args) |
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18 | #else |
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19 | #define DBG(args...) |
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20 | #endif |
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21 | |
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22 | int pci_for_each(int (*func)(pci_dev_t, void*), void *arg) |
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23 | { |
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24 | uint32_t id; |
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25 | uint8_t hd; |
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26 | int bus, dev, fun, result, fail; |
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27 | int maxbus = pci_bus_count(); |
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28 | pci_dev_t pcidev; |
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29 | |
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30 | for (bus = 0; bus < maxbus ; bus++) { |
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31 | for (dev = 0; dev <= PCI_SLOTMAX; dev++) { |
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32 | pcidev = PCI_DEV(bus, dev, 0); |
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33 | |
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34 | for (fun = 0; fun <= PCI_FUNCMAX; fun++, pcidev++) { |
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35 | fail = pci_cfg_r32(pcidev, PCIR_VENDOR, &id); |
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36 | if (fail || (0xffffffff == id) || (0 == id)) { |
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37 | if (fun == 0) |
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38 | break; |
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39 | else |
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40 | continue; |
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41 | } |
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42 | |
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43 | DBG("pcibus_for_each: found 0x%08lx at" |
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44 | " %d/%d/%d\n", id, bus, dev, fun); |
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45 | result = func(pcidev, arg); |
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46 | if (result != 0) |
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47 | return result; /* Stopped */ |
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48 | |
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49 | /* Stop if not a multi-function device */ |
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50 | if (fun == 0) { |
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51 | pci_cfg_r8(pcidev, PCIR_HDRTYPE, |
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52 | &hd); |
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53 | if ((hd & PCIM_MFDEV) == 0) |
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54 | break; |
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55 | } |
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56 | } |
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57 | } |
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58 | } |
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59 | |
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60 | return 0; /* scanned all */ |
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61 | } |
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