1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Exceptions for specific devices, 4 * 5 * Copyright IBM Corp. 2025 6 * 7 * Author(s): 8 * Niklas Schnelle <schnelle@linux.ibm.com> 9 */ 10 #include <linux/pci.h> 11 12 static void zpci_ism_bar_no_mmap(struct pci_dev *pdev) 13 { 14 /* 15 * ISM's BAR is special. Drivers written for ISM know 16 * how to handle this but others need to be aware of their 17 * special nature e.g. to prevent attempts to mmap() it. 18 */ 19 pdev->non_mappable_bars = 1; 20 } 21 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_IBM, 22 PCI_DEVICE_ID_IBM_ISM, 23 zpci_ism_bar_no_mmap); 24