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Date: Thu, 23 Apr 2020 14:59:32 +0800 From: peng.fan@....com To: shawnguo@...nel.org, s.hauer@...gutronix.de Cc: kernel@...gutronix.de, festevam@...il.com, linux@...pel-privat.de, leonard.crestez@....com, daniel.baluta@....com, aisheng.dong@....com, qiangqing.zhang@....com, linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-imx@....com, Peng Fan <peng.fan@....com> Subject: [PATCH 2/4] firmware: imx: add resource management api From: Peng Fan <peng.fan@....com> 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@....com> Signed-off-by: Peng Fan <peng.fan@....com> --- drivers/firmware/imx/Makefile | 2 +- drivers/firmware/imx/rm.c | 40 +++++++++++++++++++++ include/linux/firmware/imx/sci.h | 1 + include/linux/firmware/imx/svc/rm.h | 69 +++++++++++++++++++++++++++++++++++++ 4 files changed, 111 insertions(+), 1 deletion(-) create mode 100644 drivers/firmware/imx/rm.c create mode 100644 include/linux/firmware/imx/svc/rm.h diff --git a/drivers/firmware/imx/Makefile b/drivers/firmware/imx/Makefile index 08bc9ddfbdfb..17ea3613e142 100644 --- 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 index 000000000000..7b0334de5486 --- /dev/null +++ b/drivers/firmware/imx/rm.c @@ -0,0 +1,40 @@ +// 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 success and < 0 for errors. + */ +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; + + 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 17ba4e405129..b5c5a56f29be 100644 --- a/include/linux/firmware/imx/sci.h +++ b/include/linux/firmware/imx/sci.h @@ -15,6 +15,7 @@ #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 index 000000000000..fc6ea62d9d0e --- /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 2017-2019 NXP + * + * Header file containing the public API for the System Controller (SC) + * Power Management (PM) function. This includes functions for power state + * control, clock control, reset control, and wake-up event control. + * + * 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 -- 2.16.4
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