[PATCH v14 03/25] 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 at linaro.org>
Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla at linaro.org>
Reviewed-by: Alex Elder <elder at linaro.org>
Signed-off-by: Elliot Berman <quic_eberman at quicinc.com>
---
 include/linux/gunyah.h | 83 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 include/linux/gunyah.h

diff --git a/include/linux/gunyah.h b/include/linux/gunyah.h
new file mode 100644
index 0000000000000..a4e8ec91961d1
--- /dev/null
+++ b/include/linux/gunyah.h
@@ -0,0 +1,83 @@
+/* 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/limits.h>
+
+/******************************************************************************/
+/* Common arch-independent definitions for Gunyah hypercalls                  */
+#define GH_CAPID_INVAL	U64_MAX
+#define GH_VMID_ROOT_VM	0xff
+
+enum gh_error {
+	GH_ERROR_OK			= 0,
+	GH_ERROR_UNIMPLEMENTED		= -1,
+	GH_ERROR_RETRY			= -2,
+
+	GH_ERROR_ARG_INVAL		= 1,
+	GH_ERROR_ARG_SIZE		= 2,
+	GH_ERROR_ARG_ALIGN		= 3,
+
+	GH_ERROR_NOMEM			= 10,
+
+	GH_ERROR_ADDR_OVFL		= 20,
+	GH_ERROR_ADDR_UNFL		= 21,
+	GH_ERROR_ADDR_INVAL		= 22,
+
+	GH_ERROR_DENIED			= 30,
+	GH_ERROR_BUSY			= 31,
+	GH_ERROR_IDLE			= 32,
+
+	GH_ERROR_IRQ_BOUND		= 40,
+	GH_ERROR_IRQ_UNBOUND		= 41,
+
+	GH_ERROR_CSPACE_CAP_NULL	= 50,
+	GH_ERROR_CSPACE_CAP_REVOKED	= 51,
+	GH_ERROR_CSPACE_WRONG_OBJ_TYPE	= 52,
+	GH_ERROR_CSPACE_INSUF_RIGHTS	= 53,
+	GH_ERROR_CSPACE_FULL		= 54,
+
+	GH_ERROR_MSGQUEUE_EMPTY		= 60,
+	GH_ERROR_MSGQUEUE_FULL		= 61,
+};
+
+/**
+ * gh_error_remap() - Remap Gunyah hypervisor errors into a Linux error code
+ * @gh_error: Gunyah hypercall return value
+ */
+static inline int gh_error_remap(enum gh_error gh_error)
+{
+	switch (gh_error) {
+	case GH_ERROR_OK:
+		return 0;
+	case GH_ERROR_NOMEM:
+		return -ENOMEM;
+	case GH_ERROR_DENIED:
+	case GH_ERROR_CSPACE_CAP_NULL:
+	case GH_ERROR_CSPACE_CAP_REVOKED:
+	case GH_ERROR_CSPACE_WRONG_OBJ_TYPE:
+	case GH_ERROR_CSPACE_INSUF_RIGHTS:
+	case GH_ERROR_CSPACE_FULL:
+		return -EACCES;
+	case GH_ERROR_BUSY:
+	case GH_ERROR_IDLE:
+		return -EBUSY;
+	case GH_ERROR_IRQ_BOUND:
+	case GH_ERROR_IRQ_UNBOUND:
+	case GH_ERROR_MSGQUEUE_FULL:
+	case GH_ERROR_MSGQUEUE_EMPTY:
+		return -EIO;
+	case GH_ERROR_UNIMPLEMENTED:
+	case GH_ERROR_RETRY:
+		return -EOPNOTSUPP;
+	default:
+		return -EINVAL;
+	}
+}
+
+#endif
-- 
2.40.0