Messages in this thread | | | From | Aisheng Dong <> | Subject | RE: [PATCH 2/4] firmware: imx: add resource management api | Date | Thu, 23 Apr 2020 14:04:36 +0000 |
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> From: Peng Fan <peng.fan@nxp.com> > Sent: Thursday, April 23, 2020 6:57 PM > > > From: Peng Fan <peng.fan@nxp.com> > > > Sent: Thursday, April 23, 2020 3:00 PM > > > > > > 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> > > > > Right now I'm still not quite understand if we really need this. > > As current resource is bound to power domains, if it's not owned by > > one specific SW execution environment, power on will also fail. > > Can you clarify if any exceptions? > > There will be lots of failures when boot Linux domu if no check. >
What kind of features did you mean? Could you clarify a bit more? I'd like to understand this issue better.
Regards Aisheng
> Thanks, > Peng. > > > > > Regards > > Aisheng > > > > > --- > > > 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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