mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-02 02:36:44 +07:00
3ad0b02e4c
Based on input from Andi Kleen: share the platform detection code with ioat_dma and disable the channel in dma engine only for specific platforms. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
84 lines
1.8 KiB
C
84 lines
1.8 KiB
C
|
|
#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;
|
|
};
|
|
|
|
/*
|
|
* The i5000 chip-set has the same hooks as the i7300
|
|
* but support is disabled by default because this driver
|
|
* has not been validated on that platform.
|
|
*/
|
|
#define SUPPORT_I5000 0
|
|
|
|
static const struct fbd_ioat fbd_ioat_list[] = {
|
|
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_CNB},
|
|
#if SUPPORT_I5000
|
|
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT},
|
|
#endif
|
|
{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) },
|
|
#if SUPPORT_I5000
|
|
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_5000_ERR) },
|
|
#endif
|
|
{ } /* 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 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_dev)
|
|
*fbd_dev = memdev;
|
|
if (ioat_dev)
|
|
*ioat_dev = dmadev;
|
|
|
|
return 0;
|
|
}
|
|
}
|
|
return -ENODEV;
|
|
}
|
|
|
|
#endif
|