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f5bfeff446
The imx SC api strongly assumes that messages are composed out of
4-bytes words but some of our message structs have odd sizeofs.
This produces many oopses with CONFIG_KASAN=y.
Fix by marking with __aligned(4).
Fixes: d90bf296ae ("firmware: imx: Add support to start/stop a CPU")
Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
138 lines
3.4 KiB
C
138 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2016 Freescale Semiconductor, Inc.
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* Copyright 2017~2018 NXP
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* Author: Dong Aisheng <aisheng.dong@nxp.com>
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*
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* File containing client-side RPC functions for the MISC service. These
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* function are ported to clients that communicate to the SC.
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*
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*/
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#include <linux/firmware/imx/svc/misc.h>
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struct imx_sc_msg_req_misc_set_ctrl {
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struct imx_sc_rpc_msg hdr;
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u32 ctrl;
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u32 val;
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u16 resource;
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} __packed __aligned(4);
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struct imx_sc_msg_req_cpu_start {
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struct imx_sc_rpc_msg hdr;
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u32 address_hi;
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u32 address_lo;
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u16 resource;
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u8 enable;
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} __packed __aligned(4);
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struct imx_sc_msg_req_misc_get_ctrl {
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struct imx_sc_rpc_msg hdr;
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u32 ctrl;
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u16 resource;
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} __packed __aligned(4);
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struct imx_sc_msg_resp_misc_get_ctrl {
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struct imx_sc_rpc_msg hdr;
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u32 val;
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} __packed __aligned(4);
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/*
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* This function sets a miscellaneous control value.
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*
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* @param[in] ipc IPC handle
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* @param[in] resource resource the control is associated with
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* @param[in] ctrl control to change
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* @param[in] val value to apply to the control
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*
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* @return Returns 0 for success and < 0 for errors.
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*/
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int imx_sc_misc_set_control(struct imx_sc_ipc *ipc, u32 resource,
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u8 ctrl, u32 val)
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{
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struct imx_sc_msg_req_misc_set_ctrl msg;
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struct imx_sc_rpc_msg *hdr = &msg.hdr;
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hdr->ver = IMX_SC_RPC_VERSION;
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hdr->svc = (uint8_t)IMX_SC_RPC_SVC_MISC;
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hdr->func = (uint8_t)IMX_SC_MISC_FUNC_SET_CONTROL;
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hdr->size = 4;
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msg.ctrl = ctrl;
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msg.val = val;
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msg.resource = resource;
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return imx_scu_call_rpc(ipc, &msg, true);
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}
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EXPORT_SYMBOL(imx_sc_misc_set_control);
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/*
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* This function gets a miscellaneous control value.
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*
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* @param[in] ipc IPC handle
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* @param[in] resource resource the control is associated with
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* @param[in] ctrl control to get
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* @param[out] val pointer to return the control value
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*
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* @return Returns 0 for success and < 0 for errors.
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*/
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int imx_sc_misc_get_control(struct imx_sc_ipc *ipc, u32 resource,
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u8 ctrl, u32 *val)
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{
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struct imx_sc_msg_req_misc_get_ctrl msg;
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struct imx_sc_msg_resp_misc_get_ctrl *resp;
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struct imx_sc_rpc_msg *hdr = &msg.hdr;
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int ret;
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hdr->ver = IMX_SC_RPC_VERSION;
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hdr->svc = (uint8_t)IMX_SC_RPC_SVC_MISC;
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hdr->func = (uint8_t)IMX_SC_MISC_FUNC_GET_CONTROL;
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hdr->size = 3;
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msg.ctrl = ctrl;
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msg.resource = resource;
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ret = imx_scu_call_rpc(ipc, &msg, true);
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if (ret)
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return ret;
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resp = (struct imx_sc_msg_resp_misc_get_ctrl *)&msg;
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if (val != NULL)
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*val = resp->val;
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return 0;
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}
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EXPORT_SYMBOL(imx_sc_misc_get_control);
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/*
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* This function starts/stops a CPU identified by @resource
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*
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* @param[in] ipc IPC handle
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* @param[in] resource resource the control is associated with
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* @param[in] enable true for start, false for stop
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* @param[in] phys_addr initial instruction address to be executed
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*
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* @return Returns 0 for success and < 0 for errors.
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*/
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int imx_sc_pm_cpu_start(struct imx_sc_ipc *ipc, u32 resource,
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bool enable, u64 phys_addr)
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{
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struct imx_sc_msg_req_cpu_start msg;
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struct imx_sc_rpc_msg *hdr = &msg.hdr;
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hdr->ver = IMX_SC_RPC_VERSION;
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hdr->svc = IMX_SC_RPC_SVC_PM;
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hdr->func = IMX_SC_PM_FUNC_CPU_START;
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hdr->size = 4;
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msg.address_hi = phys_addr >> 32;
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msg.address_lo = phys_addr;
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msg.resource = resource;
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msg.enable = enable;
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return imx_scu_call_rpc(ipc, &msg, true);
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}
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EXPORT_SYMBOL(imx_sc_pm_cpu_start);
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