1 // SPDX-License-Identifier: GPL-2.0
7 #define pr_fmt(fmt) "riscv-imsic: " fmt
15 #include <linux/irqchip/riscv-imsic.h>
21 #include "irq-riscv-imsic-state.h"
28 	struct imsic_local_config *local = per_cpu_ptr(imsic->global.local, cpu);  in imsic_ipi_send()
30 	writel_relaxed(IMSIC_IPI_ID, local->msi_va);  in imsic_ipi_send()
49 	/* Create IMSIC IPI multiplexing */  in imsic_ipi_domain_init()
52 		return virq < 0 ? virq : -ENOMEM;  in imsic_ipi_domain_init()
58 	pr_info("%pfwP: providing IPIs using interrupt %d\n", imsic->fwnode, IMSIC_IPI_ID);  in imsic_ipi_domain_init()
70  * instruction. If TOPEI CSR is non-zero then we translate TOPEI.ID to
91 		if (unlikely(!imsic->base_domain))  in imsic_handle_irq()
96 			pr_warn_ratelimited("vector not found for local ID 0x%lx\n", local_id);  in imsic_handle_irq()
100 		err = generic_handle_domain_irq(imsic->base_domain, vec->hwirq);  in imsic_handle_irq()
102 			pr_warn_ratelimited("hwirq 0x%x mapping not found\n", vec->hwirq);  in imsic_handle_irq()
110 	/* Mark per-CPU IMSIC state as online */  in imsic_starting_cpu()
113 	/* Enable per-CPU parent interrupt */  in imsic_starting_cpu()
121 	 * this CPU was not running so sync-up local enable/disable state.  in imsic_starting_cpu()
136 	/* Mark per-CPU IMSIC state as offline */  in imsic_dying_cpu()
151 		return -ENOENT;  in imsic_early_probe()
156 		return -ENOENT;  in imsic_early_probe()
159 	/* Initialize IPI domain */  in imsic_early_probe()
162 		pr_err("%pfwP: Failed to initialize IPI domain\n", fwnode);  in imsic_early_probe()
172 	 * Don't disable per-CPU IMSIC file when CPU goes offline  in imsic_early_probe()
173 	 * because this affects IPI and the masking/unmasking of  in imsic_early_probe()
174 	 * virtual IPIs is done via generic IPI-Mux  in imsic_early_probe()
184 	struct fwnode_handle *fwnode = &node->fwnode;  in imsic_early_dt_init()
224 		return -ENOMEM;  in imsic_early_acpi_init()
254 	 * Even if imsic_platform_acpi_probe() fails, the IPI part of IMSIC can  in imsic_early_acpi_init()
256 	 * DT where IPI works but MSI probe fails for some reason.  in imsic_early_acpi_init()