Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * Copyright 2006-2007, Michael Ellerman, IBM Corporation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #include <linux/msi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include <linux/pci.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <asm/machdep.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 	struct pci_controller *phb = pci_bus_to_host(dev->bus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	if (!phb->controller_ops.setup_msi_irqs ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	    !phb->controller_ops.teardown_msi_irqs) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 		pr_debug("msi: Platform doesn't provide MSI callbacks.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 		return -ENOSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	/* PowerPC doesn't support multiple MSI yet */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	if (type == PCI_CAP_ID_MSI && nvec > 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 		return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	return phb->controller_ops.setup_msi_irqs(dev, nvec, type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) void arch_teardown_msi_irqs(struct pci_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	struct pci_controller *phb = pci_bus_to_host(dev->bus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	 * We can be called even when arch_setup_msi_irqs() returns -ENOSYS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	 * so check the pointer again.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	if (phb->controller_ops.teardown_msi_irqs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 		phb->controller_ops.teardown_msi_irqs(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) }