1 // SPDX-License-Identifier: GPL-2.0-only
2 // Copyright (C) 2013-2015 ARM Limited, All Rights Reserved.
10 #include "irq-gic-common.h"
11 #include "irq-msi-lib.h"
24 	int msi, msix, *count = data;  in its_pci_msi_vec_count()  local
26 	msi = max(pci_msi_vec_count(pdev), 0);  in its_pci_msi_vec_count()
28 	*count += max(msi, msix);  in its_pci_msi_vec_count()
50 		return -EINVAL;  in its_pci_msi_prepare()
61 		if (alias_dev->subordinate)  in its_pci_msi_prepare()
62 			pci_walk_bus(alias_dev->subordinate,  in its_pci_msi_prepare()
64 		info->flags |= MSI_ALLOC_FLAGS_PROXY_DEVICE;  in its_pci_msi_prepare()
68 	info->scratchpad[0].ul = pci_msi_domain_get_msi_rid(domain->parent, pdev);  in its_pci_msi_prepare()
71 	 * @domain->msi_domain_info->hwsize contains the size of the  in its_pci_msi_prepare()
72 	 * MSI[-X] domain, but vector allocation happens one by one. This  in its_pci_msi_prepare()
73 	 * needs some thought when MSI comes into play as the size of MSI  in its_pci_msi_prepare()
78 	if (msi_info->hwsize > nvec)  in its_pci_msi_prepare()
79 		nvec = msi_info->hwsize;  in its_pci_msi_prepare()
89 	if (!info->scratchpad[0].ul)  in its_pci_msi_prepare()
93 	msi_info = msi_get_domain_info(domain->parent);  in its_pci_msi_prepare()
94 	return msi_info->ops->msi_prepare(domain->parent, dev, nvec, info);  in its_pci_msi_prepare()
105 	/* Suck the DeviceID out of the msi-parent property */  in of_pmsi_get_dev_id()
109 		ret = of_parse_phandle_with_args(dev->of_node,  in of_pmsi_get_dev_id()
110 						 "msi-parent", "#msi-cells",  in of_pmsi_get_dev_id()
114 				return -EINVAL;  in of_pmsi_get_dev_id()
126 	return -1;  in iort_pmsi_get_dev_id()
136 	if (dev->of_node)  in its_pmsi_prepare()
137 		ret = of_pmsi_get_dev_id(domain->parent, dev, &dev_id);  in its_pmsi_prepare()
144 	info->scratchpad[0].ul = dev_id;  in its_pmsi_prepare()
147 	 * @domain->msi_domain_info->hwsize contains the size of the device  in its_pmsi_prepare()
151 	if (msi_info->hwsize > nvec)  in its_pmsi_prepare()
152 		nvec = msi_info->hwsize;  in its_pmsi_prepare()
157 	msi_info = msi_get_domain_info(domain->parent);  in its_pmsi_prepare()
158 	return msi_info->ops->msi_prepare(domain->parent,  in its_pmsi_prepare()
168 	switch(info->bus_token) {  in its_init_dev_msi_info()
174 		 * support for dynamic post-enable MSI-X allocations  in its_init_dev_msi_info()
177 		 * time via info->hwsize.  in its_init_dev_msi_info()
179 		 * That should work perfectly fine for MSI/MSI-X but needs  in its_init_dev_msi_info()
180 		 * some thoughts for purely software managed MSI domains  in its_init_dev_msi_info()
184 		info->ops->msi_prepare = its_pci_msi_prepare;  in its_init_dev_msi_info()
192 		info->ops->msi_prepare = its_pmsi_prepare;  in its_init_dev_msi_info()
208 	.prefix			= "ITS-",