Revert "cxl: Add cxl_slot_is_supported API"

	return (depth > CXL_MAX_PCIEX_PARENT);

}

bool cxl_slot_is_supported(struct pci_dev *dev, int flags)

{

	if (!cpu_has_feature(CPU_FTR_HVMODE))

		return false;

	if ((flags & CXL_SLOT_FLAG_DMA) && (!pvr_version_is(PVR_POWER8NVL))) {

		/*

		 * CAPP DMA mode is technically supported on regular P8, but

		 * will EEH if the card attempts to access memory < 4GB, which

		 * we cannot realistically avoid. We might be able to work

		 * around the issue, but until then return unsupported:

		 */

		return false;

	}

	if (cxl_slot_is_switched(dev))

		return false;

	/*

	 * XXX: This gets a little tricky on regular P8 (not POWER8NVL) since

	 * the CAPP can be connected to PHB 0, 1 or 2 on a first come first

	 * served basis, which is racy to check from here. If we need to

	 * support this in future we might need to consider having this

	 * function effectively reserve it ahead of time.

	 *

	 * Currently, the only user of this API is the Mellanox CX4, which is

	 * only supported on P8NVL due to the above mentioned limitation of

	 * CAPP DMA mode and therefore does not need to worry about this. If the

	 * issue with CAPP DMA mode is later worked around on P8 we might need

	 * to revisit this.

	 */

	return true;

}

EXPORT_SYMBOL_GPL(cxl_slot_is_supported);

static int cxl_probe(struct pci_dev *dev, const struct pci_device_id *id)

{

	struct cxl *adapter;

 * generic PCI API. This API is agnostic to the actual AFU.

 */

#define CXL_SLOT_FLAG_DMA 0x1

/*

 * Checks if the given card is in a cxl capable slot. Pass CXL_SLOT_FLAG_DMA if

 * the card requires CAPP DMA mode to also check if the system supports it.

 * This is intended to be used by bi-modal devices to determine if they can use

 * cxl mode or if they should continue running in PCI mode.

 *

 * Note that this only checks if the slot is cxl capable - it does not

 * currently check if the CAPP is currently available for chips where it can be

 * assigned to different PHBs on a first come first serve basis (i.e. P8)

 */

bool cxl_slot_is_supported(struct pci_dev *dev, int flags);

/* Get the AFU associated with a pci_dev */

struct cxl_afu *cxl_pci_to_afu(struct pci_dev *dev);