firmware: imx: add resource management api

Add resource management API, when we have multiple
partition running together, resources not owned to current
partition should not be used.

Reviewed-by: Leonard Crestez <leonard.crestez@nxp.com>
Reviewed-by: Dong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

diff --git a/drivers/firmware/imx/Makefile b/drivers/firmware/imx/Makefile
index 08bc9dd..17ea361 100644 (file)
--- a/drivers/firmware/imx/Makefile
+++ b/drivers/firmware/imx/Makefile
@@ -1,4 +1,4 @@
 # SPDX-License-Identifier: GPL-2.0
 obj-$(CONFIG_IMX_DSP)          += imx-dsp.o
-obj-$(CONFIG_IMX_SCU)          += imx-scu.o misc.o imx-scu-irq.o
+obj-$(CONFIG_IMX_SCU)          += imx-scu.o misc.o imx-scu-irq.o rm.o
 obj-$(CONFIG_IMX_SCU_PD)       += scu-pd.o

diff --git a/drivers/firmware/imx/rm.c b/drivers/firmware/imx/rm.c
new file mode 100644 (file)
index 0000000..a12db6f
--- /dev/null
+++ b/drivers/firmware/imx/rm.c
@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2020 NXP
+ *
+ * File containing client-side RPC functions for the RM service. These
+ * function are ported to clients that communicate to the SC.
+ */
+
+#include <linux/firmware/imx/svc/rm.h>
+
+struct imx_sc_msg_rm_rsrc_owned {
+       struct imx_sc_rpc_msg hdr;
+       u16 resource;
+} __packed __aligned(4);
+
+/*
+ * This function check @resource is owned by current partition or not
+ *
+ * @param[in]     ipc         IPC handle
+ * @param[in]     resource    resource the control is associated with
+ *
+ * @return Returns 0 for not owned and 1 for owned.
+ */
+bool imx_sc_rm_is_resource_owned(struct imx_sc_ipc *ipc, u16 resource)
+{
+       struct imx_sc_msg_rm_rsrc_owned msg;
+       struct imx_sc_rpc_msg *hdr = &msg.hdr;
+
+       hdr->ver = IMX_SC_RPC_VERSION;
+       hdr->svc = IMX_SC_RPC_SVC_RM;
+       hdr->func = IMX_SC_RM_FUNC_IS_RESOURCE_OWNED;
+       hdr->size = 2;
+
+       msg.resource = resource;
+
+       /*
+        * SCU firmware only returns value 0 or 1
+        * for resource owned check which means not owned or owned.
+        * So it is always successful.
+        */
+       imx_scu_call_rpc(ipc, &msg, true);
+
+       return hdr->func;
+}
+EXPORT_SYMBOL(imx_sc_rm_is_resource_owned);

diff --git a/include/linux/firmware/imx/sci.h b/include/linux/firmware/imx/sci.h
index 3fa418a..3c459f5 100644 (file)
--- a/include/linux/firmware/imx/sci.h
+++ b/include/linux/firmware/imx/sci.h
@@ -14,6 +14,7 @@
 
 #include <linux/firmware/imx/svc/misc.h>
 #include <linux/firmware/imx/svc/pm.h>
+#include <linux/firmware/imx/svc/rm.h>
 
 int imx_scu_enable_general_irq_channel(struct device *dev);
 int imx_scu_irq_register_notifier(struct notifier_block *nb);

diff --git a/include/linux/firmware/imx/svc/rm.h b/include/linux/firmware/imx/svc/rm.h
new file mode 100644 (file)
index 0000000..456b6a5
--- /dev/null
+++ b/include/linux/firmware/imx/svc/rm.h
@@ -0,0 +1,69 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2016 Freescale Semiconductor, Inc.
+ * Copyright 2017-2020 NXP
+ *
+ * Header file containing the public API for the System Controller (SC)
+ * Resource Management (RM) function. This includes functions for
+ * partitioning resources, pads, and memory regions.
+ *
+ * RM_SVC (SVC) Resource Management Service
+ *
+ * Module for the Resource Management (RM) service.
+ */
+
+#ifndef _SC_RM_API_H
+#define _SC_RM_API_H
+
+#include <linux/firmware/imx/sci.h>
+
+/*
+ * This type is used to indicate RPC RM function calls.
+ */
+enum imx_sc_rm_func {
+       IMX_SC_RM_FUNC_UNKNOWN = 0,
+       IMX_SC_RM_FUNC_PARTITION_ALLOC = 1,
+       IMX_SC_RM_FUNC_SET_CONFIDENTIAL = 31,
+       IMX_SC_RM_FUNC_PARTITION_FREE = 2,
+       IMX_SC_RM_FUNC_GET_DID = 26,
+       IMX_SC_RM_FUNC_PARTITION_STATIC = 3,
+       IMX_SC_RM_FUNC_PARTITION_LOCK = 4,
+       IMX_SC_RM_FUNC_GET_PARTITION = 5,
+       IMX_SC_RM_FUNC_SET_PARENT = 6,
+       IMX_SC_RM_FUNC_MOVE_ALL = 7,
+       IMX_SC_RM_FUNC_ASSIGN_RESOURCE = 8,
+       IMX_SC_RM_FUNC_SET_RESOURCE_MOVABLE = 9,
+       IMX_SC_RM_FUNC_SET_SUBSYS_RSRC_MOVABLE = 28,
+       IMX_SC_RM_FUNC_SET_MASTER_ATTRIBUTES = 10,
+       IMX_SC_RM_FUNC_SET_MASTER_SID = 11,
+       IMX_SC_RM_FUNC_SET_PERIPHERAL_PERMISSIONS = 12,
+       IMX_SC_RM_FUNC_IS_RESOURCE_OWNED = 13,
+       IMX_SC_RM_FUNC_GET_RESOURCE_OWNER = 33,
+       IMX_SC_RM_FUNC_IS_RESOURCE_MASTER = 14,
+       IMX_SC_RM_FUNC_IS_RESOURCE_PERIPHERAL = 15,
+       IMX_SC_RM_FUNC_GET_RESOURCE_INFO = 16,
+       IMX_SC_RM_FUNC_MEMREG_ALLOC = 17,
+       IMX_SC_RM_FUNC_MEMREG_SPLIT = 29,
+       IMX_SC_RM_FUNC_MEMREG_FRAG = 32,
+       IMX_SC_RM_FUNC_MEMREG_FREE = 18,
+       IMX_SC_RM_FUNC_FIND_MEMREG = 30,
+       IMX_SC_RM_FUNC_ASSIGN_MEMREG = 19,
+       IMX_SC_RM_FUNC_SET_MEMREG_PERMISSIONS = 20,
+       IMX_SC_RM_FUNC_IS_MEMREG_OWNED = 21,
+       IMX_SC_RM_FUNC_GET_MEMREG_INFO = 22,
+       IMX_SC_RM_FUNC_ASSIGN_PAD = 23,
+       IMX_SC_RM_FUNC_SET_PAD_MOVABLE = 24,
+       IMX_SC_RM_FUNC_IS_PAD_OWNED = 25,
+       IMX_SC_RM_FUNC_DUMP = 27,
+};
+
+#if IS_ENABLED(CONFIG_IMX_SCU)
+bool imx_sc_rm_is_resource_owned(struct imx_sc_ipc *ipc, u16 resource);
+#else
+static inline bool
+imx_sc_rm_is_resource_owned(struct imx_sc_ipc *ipc, u16 resource)
+{
+       return true;
+}
+#endif
+#endif