diff options
| -rw-r--r-- | drivers/misc/cxl/pci.c | 37 | ||||
| -rw-r--r-- | include/misc/cxl.h | 15 |
2 files changed, 0 insertions, 52 deletions
diff --git a/drivers/misc/cxl/pci.c b/drivers/misc/cxl/pci.c index 193ff22f610b..0ca818396524 100644 --- a/drivers/misc/cxl/pci.c +++ b/drivers/misc/cxl/pci.c @@ -1808,43 +1808,6 @@ int cxl_slot_is_switched(struct pci_dev *dev) 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; diff --git a/include/misc/cxl.h b/include/misc/cxl.h index 74da2e440763..ea9ff4a1a9ca 100644 --- a/include/misc/cxl.h +++ b/include/misc/cxl.h @@ -24,21 +24,6 @@ * 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); |