Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
firmware: imx: add get resource owner api
Add resource owner management API, this API could be used to check
whether M4 is under control of Linux.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
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drivers/firmware/imx/rm.c
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drivers/firmware/imx/rm.c
···
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return hdr->func;
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}
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EXPORT_SYMBOL(imx_sc_rm_is_resource_owned);
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struct imx_sc_msg_rm_get_resource_owner {
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struct imx_sc_rpc_msg hdr;
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union {
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struct {
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u16 resource;
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} req;
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struct {
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u8 val;
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} resp;
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} data;
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} __packed __aligned(4);
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/*
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* This function get @resource partition number
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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[out] pt pointer to return the partition number
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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_rm_get_resource_owner(struct imx_sc_ipc *ipc, u16 resource, u8 *pt)
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{
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struct imx_sc_msg_rm_get_resource_owner msg;
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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 = IMX_SC_RPC_SVC_RM;
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hdr->func = IMX_SC_RM_FUNC_GET_RESOURCE_OWNER;
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hdr->size = 2;
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msg.data.req.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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if (pt)
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*pt = msg.data.resp.val;
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return 0;
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}
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EXPORT_SYMBOL(imx_sc_rm_get_resource_owner);
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include/linux/firmware/imx/svc/rm.h
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include/linux/firmware/imx/svc/rm.h
···
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#if IS_ENABLED(CONFIG_IMX_SCU)
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bool imx_sc_rm_is_resource_owned(struct imx_sc_ipc *ipc, u16 resource);
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int imx_sc_rm_get_resource_owner(struct imx_sc_ipc *ipc, u16 resource, u8 *pt);
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#else
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static inline bool
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imx_sc_rm_is_resource_owned(struct imx_sc_ipc *ipc, u16 resource)
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{
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return true;
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}
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static inline int imx_sc_rm_get_resource_owner(struct imx_sc_ipc *ipc, u16 resource, u8 *pt)
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{
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return -EOPNOTSUPP;
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}
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#endif
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#endif