root/include/linux/i7300_idle.h

DEFINITIONS

1. i7300_idle_platform_probe

#ifndef I7300_IDLE_H
#define I7300_IDLE_H

#include <linux/pci.h>

/*
 * I/O AT controls (PCI bus 0 device 8 function 0)
 * DIMM controls (PCI bus 0 device 16 function 1)
 */
#define IOAT_BUS 0
#define IOAT_DEVFN PCI_DEVFN(8, 0)
#define MEMCTL_BUS 0
#define MEMCTL_DEVFN PCI_DEVFN(16, 1)

struct fbd_ioat {
        unsigned int vendor;
        unsigned int ioat_dev;
        unsigned int enabled;
};

/*
 * The i5000 chip-set has the same hooks as the i7300
 * but it is not enabled by default and must be manually
 * manually enabled with "forceload=1" because it is
 * only lightly validated.
 */

static const struct fbd_ioat fbd_ioat_list[] = {
        {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_CNB, 1},
        {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT, 0},
        {0, 0}
};

/* table of devices that work with this driver */
static const struct pci_device_id pci_tbl[] = {
        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_FBD_CNB) },
        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_5000_ERR) },
        { } /* Terminating entry */
};

/* Check for known platforms with I/O-AT */
static inline int i7300_idle_platform_probe(struct pci_dev **fbd_dev,
                                                struct pci_dev **ioat_dev,
                                                int enable_all)
{
        int i;
        struct pci_dev *memdev, *dmadev;

        memdev = pci_get_bus_and_slot(MEMCTL_BUS, MEMCTL_DEVFN);
        if (!memdev)
                return -ENODEV;

        for (i = 0; pci_tbl[i].vendor != 0; i++) {
                if (memdev->vendor == pci_tbl[i].vendor &&
                    memdev->device == pci_tbl[i].device) {
                        break;
                }
        }
        if (pci_tbl[i].vendor == 0)
                return -ENODEV;

        dmadev = pci_get_bus_and_slot(IOAT_BUS, IOAT_DEVFN);
        if (!dmadev)
                return -ENODEV;

        for (i = 0; fbd_ioat_list[i].vendor != 0; i++) {
                if (dmadev->vendor == fbd_ioat_list[i].vendor &&
                    dmadev->device == fbd_ioat_list[i].ioat_dev) {
                        if (!(fbd_ioat_list[i].enabled || enable_all))
                                continue;
                        if (fbd_dev)
                                *fbd_dev = memdev;
                        if (ioat_dev)
                                *ioat_dev = dmadev;

                        return 0;
                }
        }
        return -ENODEV;
}

#endif