Mailbox WIP to discuss how we will implement RTKit

drivers/irqchip/irq-apple-aic.c

@@ -226,7 +226,7 @@ static void aic_irq_eoi(struct irq_data *d)
 	 * Reading the interrupt reason automatically acknowledges and masks
 	 * the IRQ, so we just unmask it here if needed.
 	 */
-	if (!irqd_irq_disabled(d) && !irqd_irq_masked(d))
+	if (!irqd_irq_masked(d))
 		aic_irq_unmask(d);
 }
 

drivers/mailbox/Kconfig

@@ -8,6 +8,11 @@ menuconfig MAILBOX
 
 if MAILBOX
 
+config APPLE_MBOX
+	tristate "Apple RTKit Mailbox"
+	depends on ARM64
+	default ARCH_APPLE
+
 config ARM_MHU
 	tristate "ARM MHU Mailbox"
 	depends on ARM_AMBA

drivers/mailbox/Makefile

@@ -58,3 +58,7 @@ obj-$(CONFIG_SUN6I_MSGBOX)	+= sun6i-msgbox.o
 obj-$(CONFIG_SPRD_MBOX)		+= sprd-mailbox.o
 
 obj-$(CONFIG_QCOM_IPCC)		+= qcom-ipcc.o
+
+obj-$(CONFIG_APPLE_MBOX)	+= apple-asc-mailbox.o
+
+CFLAGS_apple-asc-mailbox.o				:= -I$(src)

drivers/mailbox/apple-asc-mailbox-trace.h

@@ -0,0 +1,81 @@
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM apple_asc
+
+#if !defined(__APPLE_ASC_MAILBOX_TRACE_H) || defined(TRACE_HEADER_MULTI_READ)
+#define __APPLE_ASC_MAILBOX_TRACE_H
+
+#include <linux/types.h>
+#include <linux/tracepoint.h>
+
+#include "apple-asc-mailbox.h"
+
+DECLARE_EVENT_CLASS(apple_rtkit_log_msg,
+	TP_PROTO(struct apple_mbox *mbox, u64 msg0, u64 msg1),
+	TP_ARGS(mbox, msg0, msg1),
+	TP_STRUCT__entry(
+                __string(name, dev_name(mbox->dev))
+		__field(u64, msg0)
+		__field(u64, msg1)
+	),
+	TP_fast_assign(
+                __assign_str(name, dev_name(mbox->dev));
+		__entry->msg0 = msg0;
+		__entry->msg1 = msg1;
+	),
+	TP_printk("%s: %016llx %016llx (ep: 0x%02x)",
+                __get_str(name),
+		__entry->msg0,
+		__entry->msg1,
+		((u8)__entry->msg1&0xff))
+);
+
+DEFINE_EVENT(apple_rtkit_log_msg, apple_mbox_hw_send,
+	TP_PROTO(struct apple_mbox *mbox, u64 msg0, u64 msg1),
+	TP_ARGS(mbox, msg0, msg1)
+);
+
+DEFINE_EVENT(apple_rtkit_log_msg, apple_mbox_hw_recv,
+	TP_PROTO(struct apple_mbox *mbox, u64 msg0, u64 msg1),
+	TP_ARGS(mbox, msg0, msg1)
+);
+
+DEFINE_EVENT(apple_rtkit_log_msg, apple_mbox_send_fifo_put,
+	TP_PROTO(struct apple_mbox *mbox, u64 msg0, u64 msg1),
+	TP_ARGS(mbox, msg0, msg1)
+);
+
+DECLARE_EVENT_CLASS(apple_rtkit_irq_endis,
+	TP_PROTO(struct apple_mbox *mbox, bool enable),
+	TP_ARGS(mbox, enable),
+	TP_STRUCT__entry(
+                __string(name, dev_name(mbox->dev))
+		__field(bool, enable)
+	),
+	TP_fast_assign(
+                __assign_str(name, dev_name(mbox->dev));
+		__entry->enable = enable;
+	),
+	TP_printk("%s: %d",
+                __get_str(name),
+		__entry->enable)
+);
+
+DEFINE_EVENT(apple_rtkit_irq_endis, apple_mbox_can_recv_irq_enable,
+	TP_PROTO(struct apple_mbox *mbox, bool enable),
+	TP_ARGS(mbox, enable)
+);
+
+DEFINE_EVENT(apple_rtkit_irq_endis, apple_mbox_can_send_irq_enable,
+	TP_PROTO(struct apple_mbox *mbox, bool enable),
+	TP_ARGS(mbox, enable)
+);
+
+#endif
+
+#undef TRACE_INCLUDE_PATH
+#define TRACE_INCLUDE_PATH .
+
+#undef TRACE_INCLUDE_FILE
+#define TRACE_INCLUDE_FILE apple-asc-mailbox-trace
+
+#include <trace/define_trace.h>