fa460e453a
Sleep and wake requests are sent when the application processor subsystem of the SoC is entering deep sleep states like in suspend. These requests help lower the system power requirements when the resources are not in use. Sleep and wake requests are written to the TCS slots but are not triggered at the time of writing. The TCS are triggered by the firmware after the last of the CPUs has executed its WFI. Since these requests may come in different batches of requests, it is the job of this controller driver to find and arrange the requests into the available TCSes. Signed-off-by: Lina Iyer <ilina@codeaurora.org> Signed-off-by: Raju P.L.S.S.S.N <rplsssn@codeaurora.org> Reviewed-by: Evan Green <evgreen@chromium.org> Reviewed-by: Matthias Kaehlcke <mka@chromium.org> Signed-off-by: Andy Gross <andy.gross@linaro.org>
107 lines
2.8 KiB
C
107 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (c) 2016-2018, The Linux Foundation. All rights reserved.
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*/
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#ifndef __RPM_INTERNAL_H__
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#define __RPM_INTERNAL_H__
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#include <linux/bitmap.h>
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#include <soc/qcom/tcs.h>
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#define TCS_TYPE_NR 4
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#define MAX_CMDS_PER_TCS 16
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#define MAX_TCS_PER_TYPE 3
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#define MAX_TCS_NR (MAX_TCS_PER_TYPE * TCS_TYPE_NR)
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#define MAX_TCS_SLOTS (MAX_CMDS_PER_TCS * MAX_TCS_PER_TYPE)
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struct rsc_drv;
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/**
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* struct tcs_group: group of Trigger Command Sets (TCS) to send state requests
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* to the controller
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*
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* @drv: the controller
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* @type: type of the TCS in this group - active, sleep, wake
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* @mask: mask of the TCSes relative to all the TCSes in the RSC
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* @offset: start of the TCS group relative to the TCSes in the RSC
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* @num_tcs: number of TCSes in this type
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* @ncpt: number of commands in each TCS
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* @lock: lock for synchronizing this TCS writes
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* @req: requests that are sent from the TCS
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* @cmd_cache: flattened cache of cmds in sleep/wake TCS
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* @slots: indicates which of @cmd_addr are occupied
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*/
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struct tcs_group {
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struct rsc_drv *drv;
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int type;
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u32 mask;
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u32 offset;
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int num_tcs;
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int ncpt;
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spinlock_t lock;
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const struct tcs_request *req[MAX_TCS_PER_TYPE];
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u32 *cmd_cache;
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DECLARE_BITMAP(slots, MAX_TCS_SLOTS);
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};
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/**
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* struct rpmh_request: the message to be sent to rpmh-rsc
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*
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* @msg: the request
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* @cmd: the payload that will be part of the @msg
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* @completion: triggered when request is done
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* @dev: the device making the request
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* @err: err return from the controller
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*/
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struct rpmh_request {
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struct tcs_request msg;
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struct tcs_cmd cmd[MAX_RPMH_PAYLOAD];
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struct completion *completion;
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const struct device *dev;
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int err;
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};
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/**
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* struct rpmh_ctrlr: our representation of the controller
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*
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* @drv: the controller instance
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*/
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struct rpmh_ctrlr {
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struct rsc_drv *drv;
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};
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/**
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* struct rsc_drv: the Direct Resource Voter (DRV) of the
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* Resource State Coordinator controller (RSC)
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*
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* @name: controller identifier
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* @tcs_base: start address of the TCS registers in this controller
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* @id: instance id in the controller (Direct Resource Voter)
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* @num_tcs: number of TCSes in this DRV
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* @tcs: TCS groups
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* @tcs_in_use: s/w state of the TCS
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* @lock: synchronize state of the controller
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* @client: handle to the DRV's client.
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*/
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struct rsc_drv {
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const char *name;
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void __iomem *tcs_base;
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int id;
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int num_tcs;
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struct tcs_group tcs[TCS_TYPE_NR];
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DECLARE_BITMAP(tcs_in_use, MAX_TCS_NR);
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spinlock_t lock;
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struct rpmh_ctrlr client;
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};
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int rpmh_rsc_send_data(struct rsc_drv *drv, const struct tcs_request *msg);
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int rpmh_rsc_write_ctrl_data(struct rsc_drv *drv,
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const struct tcs_request *msg);
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int rpmh_rsc_invalidate(struct rsc_drv *drv);
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void rpmh_tx_done(const struct tcs_request *msg, int r);
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#endif /* __RPM_INTERNAL_H__ */
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