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Diffstat (limited to 'drivers/soc/qcom/rpmh-internal.h')
| -rw-r--r-- | drivers/soc/qcom/rpmh-internal.h | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/drivers/soc/qcom/rpmh-internal.h b/drivers/soc/qcom/rpmh-internal.h new file mode 100644 index 000000000..344ba687c --- /dev/null +++ b/drivers/soc/qcom/rpmh-internal.h @@ -0,0 +1,136 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (c) 2016-2018, The Linux Foundation. All rights reserved. + */ + + +#ifndef __RPM_INTERNAL_H__ +#define __RPM_INTERNAL_H__ + +#include <linux/bitmap.h> +#include <linux/wait.h> +#include <soc/qcom/tcs.h> + +#define TCS_TYPE_NR 4 +#define MAX_CMDS_PER_TCS 16 +#define MAX_TCS_PER_TYPE 3 +#define MAX_TCS_NR (MAX_TCS_PER_TYPE * TCS_TYPE_NR) +#define MAX_TCS_SLOTS (MAX_CMDS_PER_TCS * MAX_TCS_PER_TYPE) + +struct rsc_drv; + +/** + * struct tcs_group: group of Trigger Command Sets (TCS) to send state requests + * to the controller + * + * @drv: The controller. + * @type: Type of the TCS in this group - active, sleep, wake. + * @mask: Mask of the TCSes relative to all the TCSes in the RSC. + * @offset: Start of the TCS group relative to the TCSes in the RSC. + * @num_tcs: Number of TCSes in this type. + * @ncpt: Number of commands in each TCS. + * @req: Requests that are sent from the TCS; only used for ACTIVE_ONLY + * transfers (could be on a wake/sleep TCS if we are borrowing for + * an ACTIVE_ONLY transfer). + * Start: grab drv->lock, set req, set tcs_in_use, drop drv->lock, + * trigger + * End: get irq, access req, + * grab drv->lock, clear tcs_in_use, drop drv->lock + * @slots: Indicates which of @cmd_addr are occupied; only used for + * SLEEP / WAKE TCSs. Things are tightly packed in the + * case that (ncpt < MAX_CMDS_PER_TCS). That is if ncpt = 2 and + * MAX_CMDS_PER_TCS = 16 then bit[2] = the first bit in 2nd TCS. + */ +struct tcs_group { + struct rsc_drv *drv; + int type; + u32 mask; + u32 offset; + int num_tcs; + int ncpt; + const struct tcs_request *req[MAX_TCS_PER_TYPE]; + DECLARE_BITMAP(slots, MAX_TCS_SLOTS); +}; + +/** + * struct rpmh_request: the message to be sent to rpmh-rsc + * + * @msg: the request + * @cmd: the payload that will be part of the @msg + * @completion: triggered when request is done + * @dev: the device making the request + * @err: err return from the controller + * @needs_free: check to free dynamically allocated request object + */ +struct rpmh_request { + struct tcs_request msg; + struct tcs_cmd cmd[MAX_RPMH_PAYLOAD]; + struct completion *completion; + const struct device *dev; + int err; + bool needs_free; +}; + +/** + * struct rpmh_ctrlr: our representation of the controller + * + * @cache: the list of cached requests + * @cache_lock: synchronize access to the cache data + * @dirty: was the cache updated since flush + * @batch_cache: Cache sleep and wake requests sent as batch + */ +struct rpmh_ctrlr { + struct list_head cache; + spinlock_t cache_lock; + bool dirty; + struct list_head batch_cache; +}; + +/** + * struct rsc_drv: the Direct Resource Voter (DRV) of the + * Resource State Coordinator controller (RSC) + * + * @name: Controller identifier. + * @tcs_base: Start address of the TCS registers in this controller. + * @id: Instance id in the controller (Direct Resource Voter). + * @num_tcs: Number of TCSes in this DRV. + * @rsc_pm: CPU PM notifier for controller. + * Used when solver mode is not present. + * @cpus_in_pm: Number of CPUs not in idle power collapse. + * Used when solver mode is not present. + * @tcs: TCS groups. + * @tcs_in_use: S/W state of the TCS; only set for ACTIVE_ONLY + * transfers, but might show a sleep/wake TCS in use if + * it was borrowed for an active_only transfer. You + * must hold the lock in this struct (AKA drv->lock) in + * order to update this. + * @lock: Synchronize state of the controller. If RPMH's cache + * lock will also be held, the order is: drv->lock then + * cache_lock. + * @tcs_wait: Wait queue used to wait for @tcs_in_use to free up a + * slot + * @client: Handle to the DRV's client. + */ +struct rsc_drv { + const char *name; + void __iomem *tcs_base; + int id; + int num_tcs; + struct notifier_block rsc_pm; + atomic_t cpus_in_pm; + struct tcs_group tcs[TCS_TYPE_NR]; + DECLARE_BITMAP(tcs_in_use, MAX_TCS_NR); + spinlock_t lock; + wait_queue_head_t tcs_wait; + struct rpmh_ctrlr client; +}; + +int rpmh_rsc_send_data(struct rsc_drv *drv, const struct tcs_request *msg); +int rpmh_rsc_write_ctrl_data(struct rsc_drv *drv, + const struct tcs_request *msg); +void rpmh_rsc_invalidate(struct rsc_drv *drv); + +void rpmh_tx_done(const struct tcs_request *msg, int r); +int rpmh_flush(struct rpmh_ctrlr *ctrlr); + +#endif /* __RPM_INTERNAL_H__ */ |