1 // SPDX-License-Identifier: GPL-2.0-or-later
20 #include <linux/msi.h>
34 	void __iomem    	*base;  member
40 static void __iomem *ics_native_xive(struct ics_native *in, unsigned int vec)  in ics_native_xive()  argument
42 	return in->base + 0x800 + ((vec - in->ibase) << 2);  in ics_native_xive()
47 	unsigned int vec = (unsigned int)irqd_to_hwirq(d);  in ics_native_unmask_irq()  local
52 	pr_devel("ics-native: unmask virq %d [hw 0x%x]\n", d->irq, vec);  in ics_native_unmask_irq()
54 	if (vec < in->ibase || vec >= (in->ibase + in->icount))  in ics_native_unmask_irq()
57 	server = xics_get_irq_server(d->irq, irq_data_get_affinity_mask(d), 0);  in ics_native_unmask_irq()
58 	out_be32(ics_native_xive(in, vec), (server << 8) | DEFAULT_PRIORITY);  in ics_native_unmask_irq()
65 	 * The generic MSI code returns with the interrupt disabled on the  in ics_native_startup()
66 	 * card, using the MSI mask bits. Firmware doesn't appear to unmask  in ics_native_startup()
78 static void ics_native_do_mask(struct ics_native *in, unsigned int vec)  in ics_native_do_mask()  argument
80 	out_be32(ics_native_xive(in, vec), 0xff);  in ics_native_do_mask()
85 	unsigned int vec = (unsigned int)irqd_to_hwirq(d);  in ics_native_mask_irq()  local
89 	pr_devel("ics-native: mask virq %d [hw 0x%x]\n", d->irq, vec);  in ics_native_mask_irq()
91 	if (vec < in->ibase || vec >= (in->ibase + in->icount))  in ics_native_mask_irq()
93 	ics_native_do_mask(in, vec);  in ics_native_mask_irq()
100 	unsigned int vec = (unsigned int)irqd_to_hwirq(d);  in ics_native_set_affinity()  local
106 	if (vec < in->ibase || vec >= (in->ibase + in->icount))  in ics_native_set_affinity()
107 		return -EINVAL;  in ics_native_set_affinity()
109 	server = xics_get_irq_server(d->irq, cpumask, 1);  in ics_native_set_affinity()
110 	if (server == -1) {  in ics_native_set_affinity()
112 			__func__, cpumask_pr_args(cpumask), d->irq);  in ics_native_set_affinity()
113 		return -1;  in ics_native_set_affinity()
116 	xive = in_be32(ics_native_xive(in, vec));  in ics_native_set_affinity()
118 	out_be32(ics_native_xive(in, vec), xive);  in ics_native_set_affinity()
140 	if (hw_irq < in->ibase || hw_irq >= (in->ibase + in->icount))  in ics_native_check()
141 		return -EINVAL;  in ics_native_check()
146 static void ics_native_mask_unknown(struct ics *ics, unsigned long vec)  in ics_native_mask_unknown()  argument
150 	if (vec < in->ibase || vec >= (in->ibase + in->icount))  in ics_native_mask_unknown()
153 	ics_native_do_mask(in, vec);  in ics_native_mask_unknown()
156 static long ics_native_get_server(struct ics *ics, unsigned long vec)  in ics_native_get_server()  argument
161 	if (vec < in->ibase || vec >= (in->ibase + in->icount))  in ics_native_get_server()
162 		return -EINVAL;  in ics_native_get_server()
164 	xive = in_be32(ics_native_xive(in, vec));  in ics_native_get_server()
172 	return in->node == node;  in ics_native_host_match()
191 		return -ENOMEM;  in ics_native_add_one()
192 	ics->node = of_node_get(np);  in ics_native_add_one()
193 	memcpy(&ics->ics, &ics_native_template, sizeof(struct ics));  in ics_native_add_one()
195 	ics->base = of_iomap(np, 0);  in ics_native_add_one()
196 	if (!ics->base) {  in ics_native_add_one()
198 		rc = -ENOMEM;  in ics_native_add_one()
202 	count = of_property_count_u32_elems(np, "interrupt-ranges");  in ics_native_add_one()
204 		pr_err("Failed to read interrupt-ranges of %pOFP\n", np);  in ics_native_add_one()
205 		rc = -EINVAL;  in ics_native_add_one()
212 	rc = of_property_read_u32_array(np, "interrupt-ranges",  in ics_native_add_one()
215 		pr_err("Failed to read interrupt-ranges of %pOFP\n", np);  in ics_native_add_one()
218 	ics->ibase = ranges[0];  in ics_native_add_one()
219 	ics->icount = ranges[1];  in ics_native_add_one()
222 		ics->ibase, ics->ibase + ics->icount - 1);  in ics_native_add_one()
225 	xics_register_ics(&ics->ics);  in ics_native_add_one()
229 	of_node_put(ics->node);  in ics_native_add_one()
242 	ics_native_irq_chip.irq_eoi = icp_ops->eoi;  in ics_native_init()
244 	/* Find native ICS in the device-tree */  in ics_native_init()
245 	for_each_compatible_node(ics, NULL, "openpower,xics-sources") {  in ics_native_init()
253 	return found_one ? 0 : -ENODEV;  in ics_native_init()