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21677c5ea9
System controller reports different types of events to GFX endpoint for different usecases, add initial support for them. This will be further extended to service those usecases. Signed-off-by: Raag Jadav <raag.jadav@intel.com> Reviewed-by: Mallesh Koujalagi <mallesh.koujalagi@intel.com> Link: https://patch.msgid.link/20260428054826.1202076-3-raag.jadav@intel.com Signed-off-by: Riana Tauro <riana.tauro@intel.com>
133 lines
3.3 KiB
C
133 lines
3.3 KiB
C
// SPDX-License-Identifier: MIT
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/*
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* Copyright © 2026 Intel Corporation
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*/
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#include <linux/device.h>
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#include <linux/mutex.h>
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#include <drm/drm_managed.h>
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#include "regs/xe_irq_regs.h"
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#include "regs/xe_sysctrl_regs.h"
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#include "xe_device.h"
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#include "xe_mmio.h"
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#include "xe_pm.h"
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#include "xe_soc_remapper.h"
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#include "xe_sysctrl.h"
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#include "xe_sysctrl_mailbox.h"
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#include "xe_sysctrl_types.h"
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/**
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* DOC: System Controller (sysctrl)
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*
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* System Controller (sysctrl) is a firmware-managed entity on Intel dGPUs
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* responsible for selected low-level platform management functions.
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* Communication between driver and System Controller is performed
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* via a mailbox interface, enabling command and response exchange.
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*
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* This module provides initialization and support code for interacting
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* with System Controller through the mailbox interface.
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*/
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static void sysctrl_fini(void *arg)
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{
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struct xe_device *xe = arg;
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struct xe_sysctrl *sc = &xe->sc;
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disable_work_sync(&sc->work);
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xe->soc_remapper.set_sysctrl_region(xe, 0);
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}
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static void xe_sysctrl_work(struct work_struct *work)
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{
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struct xe_sysctrl *sc = container_of(work, struct xe_sysctrl, work);
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struct xe_device *xe = sc_to_xe(sc);
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guard(xe_pm_runtime)(xe);
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xe_sysctrl_event(sc);
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}
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/**
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* xe_sysctrl_init() - Initialize System Controller subsystem
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* @xe: xe device instance
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*
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* Entry point for System Controller initialization, called from xe_device_probe.
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* This function checks platform support and initializes the system controller.
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*
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* Return: 0 on success, error code on failure
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*/
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int xe_sysctrl_init(struct xe_device *xe)
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{
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struct xe_tile *tile = xe_device_get_root_tile(xe);
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struct xe_sysctrl *sc = &xe->sc;
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int ret;
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if (!xe->info.has_soc_remapper_sysctrl)
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return 0;
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if (!xe->info.has_sysctrl)
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return 0;
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sc->mmio = devm_kzalloc(xe->drm.dev, sizeof(*sc->mmio), GFP_KERNEL);
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if (!sc->mmio)
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return -ENOMEM;
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xe_mmio_init(sc->mmio, tile, tile->mmio.regs, tile->mmio.regs_size);
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sc->mmio->adj_offset = SYSCTRL_BASE;
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sc->mmio->adj_limit = U32_MAX;
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ret = devm_mutex_init(xe->drm.dev, &sc->cmd_lock);
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if (ret)
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return ret;
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ret = devm_mutex_init(xe->drm.dev, &sc->event_lock);
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if (ret)
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return ret;
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xe->soc_remapper.set_sysctrl_region(xe, SYSCTRL_MAILBOX_INDEX);
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xe_sysctrl_mailbox_init(sc);
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INIT_WORK(&sc->work, xe_sysctrl_work);
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return devm_add_action_or_reset(xe->drm.dev, sysctrl_fini, xe);
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}
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/**
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* xe_sysctrl_irq_handler() - Handler for System Controller interrupts
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* @xe: xe device instance
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* @master_ctl: interrupt register
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*
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* Handle interrupts generated by System Controller.
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*/
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void xe_sysctrl_irq_handler(struct xe_device *xe, u32 master_ctl)
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{
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struct xe_sysctrl *sc = &xe->sc;
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if (!xe->info.has_sysctrl || !sc->work.func)
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return;
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if (master_ctl & SYSCTRL_IRQ)
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schedule_work(&sc->work);
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}
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/**
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* xe_sysctrl_pm_resume() - System Controller resume handler
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* @xe: xe device instance
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*
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* Invoked during system resume (S3/S4 to S0) and runtime resume from D3cold.
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* Restores SoC remapper configuration and reinitializes mailbox interface.
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*/
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void xe_sysctrl_pm_resume(struct xe_device *xe)
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{
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struct xe_sysctrl *sc = &xe->sc;
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if (!xe->info.has_soc_remapper_sysctrl)
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return;
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if (!xe->info.has_sysctrl)
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return;
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xe->soc_remapper.set_sysctrl_region(xe, SYSCTRL_MAILBOX_INDEX);
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xe_sysctrl_mailbox_init(sc);
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}
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