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Platform drivers need make a lot of resource state requests at the same time, say, at the start or end of an usecase. It can be quite inefficient to send each request separately. Instead they can give the RPMH library a batch of requests to be sent and wait on the whole transaction to be complete. rpmh_write_batch() is a blocking call that can be used to send multiple RPMH command sets. Each RPMH command set is set asynchronously and the API blocks until all the command sets are complete and receive their tx_done callbacks. Signed-off-by: Lina Iyer <ilina@codeaurora.org> Signed-off-by: Raju P.L.S.S.S.N <rplsssn@codeaurora.org> Reviewed-by: Matthias Kaehlcke <mka@chromium.org> Signed-off-by: Andy Gross <andy.gross@linaro.org>
115 lines
3.2 KiB
C
115 lines
3.2 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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* @needs_free: check to free dynamically allocated request object
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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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bool needs_free;
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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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* @cache: the list of cached requests
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* @cache_lock: synchronize access to the cache data
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* @dirty: was the cache updated since flush
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* @batch_cache: Cache sleep and wake requests sent as batch
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*/
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struct rpmh_ctrlr {
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struct list_head cache;
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spinlock_t cache_lock;
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bool dirty;
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struct list_head batch_cache;
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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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