1 // SPDX-License-Identifier: GPL-2.0-only
8  * Copyright 2006-2007, Michael Ellerman, IBM Corporation.
13 #include <linux/msi.h>
16 #include <asm/ppc-pci.h>
23  * needs more than 32 MSI's down the road we'll have to rethink this,
36 	pr_debug("mpic_pasemi_msi_mask_irq %d\n", data->irq);  in mpic_pasemi_msi_mask_irq()
43 	pr_debug("mpic_pasemi_msi_unmask_irq %d\n", data->irq);  in mpic_pasemi_msi_unmask_irq()
55 	.name			= "PASEMI-MSI",
65 	msi_for_each_desc(entry, &pdev->dev, MSI_DESC_ASSOCIATED) {  in pasemi_msi_teardown_msi_irqs()
66 		hwirq = virq_to_hw(entry->irq);  in pasemi_msi_teardown_msi_irqs()
67 		irq_set_msi_desc(entry->irq, NULL);  in pasemi_msi_teardown_msi_irqs()
68 		irq_dispose_mapping(entry->irq);  in pasemi_msi_teardown_msi_irqs()
69 		entry->irq = 0;  in pasemi_msi_teardown_msi_irqs()
70 		msi_bitmap_free_hwirqs(&msi_mpic->msi_bitmap, hwirq, ALLOC_CHUNK);  in pasemi_msi_teardown_msi_irqs()
82 		pr_debug("pasemi_msi: MSI-X untested, trying anyway\n");  in pasemi_msi_setup_msi_irqs()
89 	msi_for_each_desc(entry, &pdev->dev, MSI_DESC_NOTASSOCIATED) {  in pasemi_msi_setup_msi_irqs()
95 		hwirq = msi_bitmap_alloc_hwirqs(&msi_mpic->msi_bitmap,  in pasemi_msi_setup_msi_irqs()
102 		virq = irq_create_mapping(msi_mpic->irqhost, hwirq);  in pasemi_msi_setup_msi_irqs()
104 			pr_debug("pasemi_msi: failed mapping hwirq 0x%x\n",  in pasemi_msi_setup_msi_irqs()
106 			msi_bitmap_free_hwirqs(&msi_mpic->msi_bitmap, hwirq,  in pasemi_msi_setup_msi_irqs()
108 			return -ENOSPC;  in pasemi_msi_setup_msi_irqs()
111 		/* Vector on MSI is really an offset, the hardware adds  in pasemi_msi_setup_msi_irqs()
121 		pr_debug("pasemi_msi: allocated virq 0x%x (hw 0x%x) " \  in pasemi_msi_setup_msi_irqs()
122 			 "addr 0x%x\n", virq, hwirq, msg.address_lo);  in pasemi_msi_setup_msi_irqs()
125 		 * register to generate MSI [512...1023]  in pasemi_msi_setup_msi_irqs()
127 		msg.data = hwirq-0x200;  in pasemi_msi_setup_msi_irqs()
140 	of_node = irq_domain_get_of_node(mpic->irqhost);  in mpic_pasemi_msi_init()
143 				     "pasemi,pwrficient-openpic"))  in mpic_pasemi_msi_init()
144 		return -ENODEV;  in mpic_pasemi_msi_init()
152 	pr_debug("pasemi_msi: Registering PA Semi MPIC MSI callbacks\n");  in mpic_pasemi_msi_init()
156 		WARN_ON(phb->controller_ops.setup_msi_irqs);  in mpic_pasemi_msi_init()
157 		phb->controller_ops.setup_msi_irqs = pasemi_msi_setup_msi_irqs;  in mpic_pasemi_msi_init()
158 		phb->controller_ops.teardown_msi_irqs = pasemi_msi_teardown_msi_irqs;  in mpic_pasemi_msi_init()