include/linux/i7300_idle.h

   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
  16 struct 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
  29 static 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 */
  36 static 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 */
  43 static 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