[PATCH RFC v15 03/30] gunyah: Common types and error codes for Gunyah hypercalls

[Elliot Berman]

Add architecture-independent standard error codes, types, and macros for
Gunyah hypercalls.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
Reviewed-by: Alex Elder <elder@xxxxxxxxxx>
Signed-off-by: Elliot Berman <quic_eberman@xxxxxxxxxxx>
---
 include/linux/gunyah.h | 106 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 106 insertions(+)

diff --git a/include/linux/gunyah.h b/include/linux/gunyah.h
new file mode 100644
index 000000000000..e1a716d802ee
--- /dev/null
+++ b/include/linux/gunyah.h
@@ -0,0 +1,106 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2022-2023 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#ifndef _LINUX_GUNYAH_H
+#define _LINUX_GUNYAH_H
+
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/limits.h>
+
+/* Matches resource manager's resource types for VM_GET_HYP_RESOURCES RPC */
+enum gunyah_resource_type {
+	/* clang-format off */
+	GUNYAH_RESOURCE_TYPE_BELL_TX	= 0,
+	GUNYAH_RESOURCE_TYPE_BELL_RX	= 1,
+	GUNYAH_RESOURCE_TYPE_MSGQ_TX	= 2,
+	GUNYAH_RESOURCE_TYPE_MSGQ_RX	= 3,
+	GUNYAH_RESOURCE_TYPE_VCPU	= 4,
+	GUNYAH_RESOURCE_TYPE_MEM_EXTENT	= 9,
+	GUNYAH_RESOURCE_TYPE_ADDR_SPACE	= 10,
+	/* clang-format on */
+};
+
+struct gunyah_resource {
+	enum gunyah_resource_type type;
+	u64 capid;
+	unsigned int irq;
+};
+
+/******************************************************************************/
+/* Common arch-independent definitions for Gunyah hypercalls                  */
+#define GUNYAH_CAPID_INVAL U64_MAX
+#define GUNYAH_VMID_ROOT_VM 0xff
+
+enum gunyah_error {
+	/* clang-format off */
+	GUNYAH_ERROR_OK				= 0,
+	GUNYAH_ERROR_UNIMPLEMENTED		= -1,
+	GUNYAH_ERROR_RETRY			= -2,
+
+	GUNYAH_ERROR_ARG_INVAL			= 1,
+	GUNYAH_ERROR_ARG_SIZE			= 2,
+	GUNYAH_ERROR_ARG_ALIGN			= 3,
+
+	GUNYAH_ERROR_NOMEM			= 10,
+
+	GUNYAH_ERROR_ADDR_OVFL			= 20,
+	GUNYAH_ERROR_ADDR_UNFL			= 21,
+	GUNYAH_ERROR_ADDR_INVAL			= 22,
+
+	GUNYAH_ERROR_DENIED			= 30,
+	GUNYAH_ERROR_BUSY			= 31,
+	GUNYAH_ERROR_IDLE			= 32,
+
+	GUNYAH_ERROR_IRQ_BOUND			= 40,
+	GUNYAH_ERROR_IRQ_UNBOUND		= 41,
+
+	GUNYAH_ERROR_CSPACE_CAP_NULL		= 50,
+	GUNYAH_ERROR_CSPACE_CAP_REVOKED		= 51,
+	GUNYAH_ERROR_CSPACE_WRONG_OBJ_TYPE	= 52,
+	GUNYAH_ERROR_CSPACE_INSUF_RIGHTS	= 53,
+	GUNYAH_ERROR_CSPACE_FULL		= 54,
+
+	GUNYAH_ERROR_MSGQUEUE_EMPTY		= 60,
+	GUNYAH_ERROR_MSGQUEUE_FULL		= 61,
+	/* clang-format on */
+};
+
+/**
+ * gunyah_error_remap() - Remap Gunyah hypervisor errors into a Linux error code
+ * @gunyah_error: Gunyah hypercall return value
+ */
+static inline int gunyah_error_remap(enum gunyah_error gunyah_error)
+{
+	switch (gunyah_error) {
+	case GUNYAH_ERROR_OK:
+		return 0;
+	case GUNYAH_ERROR_NOMEM:
+		return -ENOMEM;
+	case GUNYAH_ERROR_DENIED:
+	case GUNYAH_ERROR_CSPACE_CAP_NULL:
+	case GUNYAH_ERROR_CSPACE_CAP_REVOKED:
+	case GUNYAH_ERROR_CSPACE_WRONG_OBJ_TYPE:
+	case GUNYAH_ERROR_CSPACE_INSUF_RIGHTS:
+		return -EACCES;
+	case GUNYAH_ERROR_CSPACE_FULL:
+	case GUNYAH_ERROR_BUSY:
+	case GUNYAH_ERROR_IDLE:
+		return -EBUSY;
+	case GUNYAH_ERROR_IRQ_BOUND:
+	case GUNYAH_ERROR_IRQ_UNBOUND:
+	case GUNYAH_ERROR_MSGQUEUE_FULL:
+	case GUNYAH_ERROR_MSGQUEUE_EMPTY:
+		return -EIO;
+	case GUNYAH_ERROR_UNIMPLEMENTED:
+		return -EOPNOTSUPP;
+	case GUNYAH_ERROR_RETRY:
+		return -EAGAIN;
+	default:
+		return -EINVAL;
+	}
+}
+
+#endif

-- 
2.43.0