LXR linux/include/linux/i7300

   1
   2#ifndef I7300_IDLE_H
   3#define I7300_IDLE_H
   4
   5#include <linux/pci.h>
   6
   7/*
   8 * I/O AT controls (PCI bus 0 device 8 function 0)
   9 * DIMM controls (PCI bus 0 device 16 function 1)
  10 */
  11#define IOAT_BUS 0
  12#define IOAT_DEVFN PCI_DEVFN(8, 0)
  13#define MEMCTL_BUS 0
  14#define MEMCTL_DEVFN PCI_DEVFN(16, 1)
  15
  16struct fbd_ioat {
  17        unsigned int vendor;
  18        unsigned int ioat_dev;
  19        unsigned int enabled;
  20};
  21
  22/*
  23 * The i5000 chip-set has the same hooks as the i7300
  24 * but it is not enabled by default and must be manually
  25 * manually enabled with "forceload=1" because it is
  26 * only lightly validated.
  27 */
  28
  29static const struct fbd_ioat fbd_ioat_list[] = {
  30        {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_CNB, 1},
  31        {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT, 0},
  32        {0, 0}
  33};
  34
  35/* table of devices that work with this driver */
  36static const struct pci_device_id pci_tbl[] = {
  37        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_FBD_CNB) },
  38        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_5000_ERR) },
  39        { } /* Terminating entry */
  40};
  41
  42/* Check for known platforms with I/O-AT */
  43static inline int i7300_idle_platform_probe(struct pci_dev **fbd_dev,
  44                                                struct pci_dev **ioat_dev,
  45                                                int enable_all)
  46{
  47        int i;
  48        struct pci_dev *memdev, *dmadev;
  49
  50        memdev = pci_get_bus_and_slot(MEMCTL_BUS, MEMCTL_DEVFN);
  51        if (!memdev)
  52                return -ENODEV;
  53
  54        for (i = 0; pci_tbl[i].vendor != 0; i++) {
  55                if (memdev->vendor == pci_tbl[i].vendor &&
  56                    memdev->device == pci_tbl[i].device) {
  57                        break;
  58                }
  59        }
  60        if (pci_tbl[i].vendor == 0)
  61                return -ENODEV;
  62
  63        dmadev = pci_get_bus_and_slot(IOAT_BUS, IOAT_DEVFN);
  64        if (!dmadev)
  65                return -ENODEV;
  66
  67        for (i = 0; fbd_ioat_list[i].vendor != 0; i++) {
  68                if (dmadev->vendor == fbd_ioat_list[i].vendor &&
  69                    dmadev->device == fbd_ioat_list[i].ioat_dev) {
  70                        if (!(fbd_ioat_list[i].enabled || enable_all))
  71                                continue;
  72                        if (fbd_dev)
  73                                *fbd_dev = memdev;
  74                        if (ioat_dev)
  75                                *ioat_dev = dmadev;
  76
  77                        return 0;
  78                }
  79        }
  80        return -ENODEV;
  81}
  82
  83#endif
  84