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