1 files changed, 108 insertions, 0 deletions
diff --git a/drivers/irqchip/irq-riscv-imsic-state.h b/drivers/irqchip/irq-riscv-imsic-state.h
new file mode 100644
index 0000000000..5ae2f69b03
--- /dev/null
+++ b/drivers/irqchip/irq-riscv-imsic-state.h
@@ -0,0 +1,108 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2021 Western Digital Corporation or its affiliates.
+ * Copyright (C) 2022 Ventana Micro Systems Inc.
+ */
+
+#ifndef _IRQ_RISCV_IMSIC_STATE_H
+#define _IRQ_RISCV_IMSIC_STATE_H
+
+#include <linux/irqchip/riscv-imsic.h>
+#include <linux/irqdomain.h>
+#include <linux/fwnode.h>
+#include <linux/timer.h>
+
+#define IMSIC_IPI_ID				1
+#define IMSIC_NR_IPI				8
+
+struct imsic_vector {
+	/* Fixed details of the vector */
+	unsigned int				cpu;
+	unsigned int				local_id;
+	/* Details saved by driver in the vector */
+	unsigned int				hwirq;
+	/* Details accessed using local lock held */
+	bool					enable;
+	struct imsic_vector			*move;
+};
+
+struct imsic_local_priv {
+	/* Local lock to protect vector enable/move variables and dirty bitmap */
+	raw_spinlock_t				lock;
+
+	/* Local dirty bitmap for synchronization */
+	unsigned long				*dirty_bitmap;
+
+#ifdef CONFIG_SMP
+	/* Local timer for synchronization */
+	struct timer_list			timer;
+#endif
+
+	/* Local vector table */
+	struct imsic_vector			*vectors;
+};
+
+struct imsic_priv {
+	/* Device details */
+	struct fwnode_handle			*fwnode;
+
+	/* Global configuration common for all HARTs */
+	struct imsic_global_config		global;
+
+	/* Per-CPU state */
+	struct imsic_local_priv __percpu	*lpriv;
+
+	/* State of IRQ matrix allocator */
+	raw_spinlock_t				matrix_lock;
+	struct irq_matrix			*matrix;
+
+	/* IRQ domains (created by platform driver) */
+	struct irq_domain			*base_domain;
+};
+
+extern struct imsic_priv *imsic;
+
+void __imsic_eix_update(unsigned long base_id, unsigned long num_id, bool pend, bool val);
+
+static inline void __imsic_id_set_enable(unsigned long id)
+{
+	__imsic_eix_update(id, 1, false, true);
+}
+
+static inline void __imsic_id_clear_enable(unsigned long id)
+{
+	__imsic_eix_update(id, 1, false, false);
+}
+
+void imsic_local_sync_all(void);
+void imsic_local_delivery(bool enable);
+
+void imsic_vector_mask(struct imsic_vector *vec);
+void imsic_vector_unmask(struct imsic_vector *vec);
+
+static inline bool imsic_vector_isenabled(struct imsic_vector *vec)
+{
+	return READ_ONCE(vec->enable);
+}
+
+static inline struct imsic_vector *imsic_vector_get_move(struct imsic_vector *vec)
+{
+	return READ_ONCE(vec->move);
+}
+
+void imsic_vector_move(struct imsic_vector *old_vec, struct imsic_vector *new_vec);
+
+struct imsic_vector *imsic_vector_from_local_id(unsigned int cpu, unsigned int local_id);
+
+struct imsic_vector *imsic_vector_alloc(unsigned int hwirq, const struct cpumask *mask);
+void imsic_vector_free(struct imsic_vector *vector);
+
+void imsic_vector_debug_show(struct seq_file *m, struct imsic_vector *vec, int ind);
+void imsic_vector_debug_show_summary(struct seq_file *m, int ind);
+
+void imsic_state_online(void);
+void imsic_state_offline(void);
+int imsic_setup_state(struct fwnode_handle *fwnode);
+int imsic_irqdomain_init(void);
+
+#endif