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-rw-r--r--drivers/irqchip/irq-riscv-imsic-state.h108
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