/*
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*
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* (C) COPYRIGHT 2014-2016 ARM Limited. All rights reserved.
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*
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* This program is free software and is provided to you under the terms of the
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* GNU General Public License version 2 as published by the Free Software
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* Foundation, and any use by you of this program is subject to the terms
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* of such GNU licence.
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*
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* A copy of the licence is included with the program, and can also be obtained
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* from Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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/*
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* HW access job manager common APIs
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*/
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#include <mali_kbase.h>
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#include "mali_kbase_hwaccess_jm.h"
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#include "mali_kbase_jm.h"
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/**
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* kbase_jm_next_job() - Attempt to run the next @nr_jobs_to_submit jobs on slot
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* @js on the active context.
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* @kbdev: Device pointer
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* @js: Job slot to run on
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* @nr_jobs_to_submit: Number of jobs to attempt to submit
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*
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* Return: true if slot can still be submitted on, false if slot is now full.
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*/
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static bool kbase_jm_next_job(struct kbase_device *kbdev, int js,
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int nr_jobs_to_submit)
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{
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struct kbase_context *kctx;
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int i;
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kctx = kbdev->hwaccess.active_kctx;
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if (!kctx)
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return true;
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for (i = 0; i < nr_jobs_to_submit; i++) {
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struct kbase_jd_atom *katom = kbase_js_pull(kctx, js);
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if (!katom)
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return true; /* Context has no jobs on this slot */
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kbase_backend_run_atom(kbdev, katom);
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}
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return false; /* Slot ringbuffer should now be full */
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}
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u32 kbase_jm_kick(struct kbase_device *kbdev, u32 js_mask)
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{
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u32 ret_mask = 0;
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lockdep_assert_held(&kbdev->hwaccess_lock);
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while (js_mask) {
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int js = ffs(js_mask) - 1;
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int nr_jobs_to_submit = kbase_backend_slot_free(kbdev, js);
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if (kbase_jm_next_job(kbdev, js, nr_jobs_to_submit))
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ret_mask |= (1 << js);
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js_mask &= ~(1 << js);
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}
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return ret_mask;
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}
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void kbase_jm_try_kick(struct kbase_device *kbdev, u32 js_mask)
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{
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struct kbasep_js_device_data *js_devdata = &kbdev->js_data;
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lockdep_assert_held(&kbdev->hwaccess_lock);
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if (!down_trylock(&js_devdata->schedule_sem)) {
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kbase_jm_kick(kbdev, js_mask);
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up(&js_devdata->schedule_sem);
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}
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}
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void kbase_jm_try_kick_all(struct kbase_device *kbdev)
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{
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struct kbasep_js_device_data *js_devdata = &kbdev->js_data;
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lockdep_assert_held(&kbdev->hwaccess_lock);
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if (!down_trylock(&js_devdata->schedule_sem)) {
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kbase_jm_kick_all(kbdev);
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up(&js_devdata->schedule_sem);
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}
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}
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void kbase_jm_idle_ctx(struct kbase_device *kbdev, struct kbase_context *kctx)
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{
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lockdep_assert_held(&kbdev->hwaccess_lock);
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if (kbdev->hwaccess.active_kctx == kctx)
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kbdev->hwaccess.active_kctx = NULL;
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}
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struct kbase_jd_atom *kbase_jm_return_atom_to_js(struct kbase_device *kbdev,
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struct kbase_jd_atom *katom)
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{
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lockdep_assert_held(&kbdev->hwaccess_lock);
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if (katom->event_code != BASE_JD_EVENT_STOPPED &&
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katom->event_code != BASE_JD_EVENT_REMOVED_FROM_NEXT) {
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return kbase_js_complete_atom(katom, NULL);
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} else {
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kbase_js_unpull(katom->kctx, katom);
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return NULL;
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}
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}
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struct kbase_jd_atom *kbase_jm_complete(struct kbase_device *kbdev,
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struct kbase_jd_atom *katom, ktime_t *end_timestamp)
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{
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lockdep_assert_held(&kbdev->hwaccess_lock);
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return kbase_js_complete_atom(katom, end_timestamp);
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}
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