linux-kernel - [PATCH v9 03/27] gunyah: Common types and error codes for Gunyah hypercalls

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Message-ID: <20230120224627.4053418-4-quic_eberman@quicinc.com>
Date:   Fri, 20 Jan 2023 14:46:02 -0800
From:   Elliot Berman <quic_eberman@...cinc.com>
To:     Bjorn Andersson <quic_bjorande@...cinc.com>,
        Alex Elder <elder@...aro.org>,
        Elliot Berman <quic_eberman@...cinc.com>,
        Murali Nalajala <quic_mnalajal@...cinc.com>
CC:     Trilok Soni <quic_tsoni@...cinc.com>,
        Srivatsa Vaddagiri <quic_svaddagi@...cinc.com>,
        Carl van Schaik <quic_cvanscha@...cinc.com>,
        Prakruthi Deepak Heragu <quic_pheragu@...cinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Arnd Bergmann <arnd@...db.de>,
        "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Jonathan Corbet <corbet@....net>,
        Bagas Sanjaya <bagasdotme@...il.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Marc Zyngier <maz@...nel.org>,
        Jassi Brar <jassisinghbrar@...il.com>,
        Sudeep Holla <sudeep.holla@....com>,
        <linux-arm-msm@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-doc@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: [PATCH v9 03/27] gunyah: Common types and error codes for Gunyah hypercalls

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

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Signed-off-by: Elliot Berman <quic_eberman@...cinc.com>
---
 MAINTAINERS            |  1 +
 include/linux/gunyah.h | 74 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 75 insertions(+)
 create mode 100644 include/linux/gunyah.h

diff --git a/MAINTAINERS b/MAINTAINERS
index d9205cb9e988..f1e07e39b2f5 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9048,6 +9048,7 @@ L:	linux-arm-msm@...r.kernel.org
 S:	Supported
 F:	Documentation/devicetree/bindings/firmware/gunyah-hypervisor.yaml
 F:	Documentation/virt/gunyah/
+F:	include/linux/gunyah.h
 
 HABANALABS PCI DRIVER
 M:	Oded Gabbay <ogabbay@...nel.org>
diff --git a/include/linux/gunyah.h b/include/linux/gunyah.h
new file mode 100644
index 000000000000..985c6086348e
--- /dev/null
+++ b/include/linux/gunyah.h
@@ -0,0 +1,74 @@
+/* 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 Gunyah macros */
+#define GH_CAPID_INVAL	U64_MAX
+#define GH_VMID_ROOT_VM	0xff
+
+#define GH_ERROR_OK			0
+
+#define GH_ERROR_UNIMPLEMENTED		-1
+#define GH_ERROR_RETRY			-2
+
+#define GH_ERROR_ARG_INVAL		1
+#define GH_ERROR_ARG_SIZE		2
+#define GH_ERROR_ARG_ALIGN		3
+
+#define GH_ERROR_NOMEM			10
+
+#define GH_ERROR_ADDR_OVFL		20
+#define GH_ERROR_ADDR_UNFL		21
+#define GH_ERROR_ADDR_INVAL		22
+
+#define GH_ERROR_DENIED			30
+#define GH_ERROR_BUSY			31
+#define GH_ERROR_IDLE			32
+
+#define GH_ERROR_IRQ_BOUND		40
+#define GH_ERROR_IRQ_UNBOUND		41
+
+#define GH_ERROR_CSPACE_CAP_NULL	50
+#define GH_ERROR_CSPACE_CAP_REVOKED	51
+#define GH_ERROR_CSPACE_WRONG_OBJ_TYPE	52
+#define GH_ERROR_CSPACE_INSUF_RIGHTS	53
+#define GH_ERROR_CSPACE_FULL		54
+
+#define GH_ERROR_MSGQUEUE_EMPTY		60
+#define GH_ERROR_MSGQUEUE_FULL		61
+
+static inline int gh_remap_error(int 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 -EPERM;
+	default:
+		return -EINVAL;
+	}
+}
+
+#endif
-- 
2.39.0