mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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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
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#ifndef I7300_IDLE_H
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#define I7300_IDLE_H
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#include <linux/pci.h>
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/*
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* I/O AT controls (PCI bus 0 device 8 function 0)
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* DIMM controls (PCI bus 0 device 16 function 1)
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*/
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#define IOAT_BUS 0
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#define IOAT_DEVFN PCI_DEVFN(8, 0)
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#define MEMCTL_BUS 0
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#define MEMCTL_DEVFN PCI_DEVFN(16, 1)
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struct fbd_ioat {
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unsigned int vendor;
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unsigned int ioat_dev;
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};
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/*
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* The i5000 chip-set has the same hooks as the i7300
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* but support is disabled by default because this driver
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* has not been validated on that platform.
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*/
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#define SUPPORT_I5000 0
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static const struct fbd_ioat fbd_ioat_list[] = {
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{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_CNB},
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#if SUPPORT_I5000
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{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT},
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#endif
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{0, 0}
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};
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/* table of devices that work with this driver */
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static const struct pci_device_id pci_tbl[] = {
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{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_FBD_CNB) },
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#if SUPPORT_I5000
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{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_5000_ERR) },
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#endif
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{ } /* Terminating entry */
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};
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/* Check for known platforms with I/O-AT */
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static inline int i7300_idle_platform_probe(struct pci_dev **fbd_dev,
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struct pci_dev **ioat_dev)
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{
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int i;
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struct pci_dev *memdev, *dmadev;
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memdev = pci_get_bus_and_slot(MEMCTL_BUS, MEMCTL_DEVFN);
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if (!memdev)
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return -ENODEV;
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for (i = 0; pci_tbl[i].vendor != 0; i++) {
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if (memdev->vendor == pci_tbl[i].vendor &&
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memdev->device == pci_tbl[i].device) {
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break;
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}
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}
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if (pci_tbl[i].vendor == 0)
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return -ENODEV;
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dmadev = pci_get_bus_and_slot(IOAT_BUS, IOAT_DEVFN);
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if (!dmadev)
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return -ENODEV;
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for (i = 0; fbd_ioat_list[i].vendor != 0; i++) {
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if (dmadev->vendor == fbd_ioat_list[i].vendor &&
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dmadev->device == fbd_ioat_list[i].ioat_dev) {
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if (fbd_dev)
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*fbd_dev = memdev;
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if (ioat_dev)
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*ioat_dev = dmadev;
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return 0;
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}
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}
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return -ENODEV;
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}
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#endif
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