lkml.org 
[lkml]   [2020]   [Apr]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH 2/4] firmware: imx: add resource management api
    Date
    From: Peng Fan <peng.fan@nxp.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@nxp.com>
    Signed-off-by: Peng Fan <peng.fan@nxp.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
    \
     
     \ /
      Last update: 2020-04-23 09:09    [W:4.276 / U:0.068 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site