/*
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*
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* (C) COPYRIGHT 2010-2017 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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* Base kernel context APIs
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*/
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#include <mali_kbase.h>
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#include <mali_midg_regmap.h>
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#include <mali_kbase_mem_linux.h>
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#include <mali_kbase_dma_fence.h>
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#include <mali_kbase_ctx_sched.h>
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/**
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* kbase_create_context() - Create a kernel base context.
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* @kbdev: Kbase device
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* @is_compat: Force creation of a 32-bit context
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*
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* Allocate and init a kernel base context.
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*
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* Return: new kbase context
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*/
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struct kbase_context *
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kbase_create_context(struct kbase_device *kbdev, bool is_compat)
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{
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struct kbase_context *kctx;
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int err;
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KBASE_DEBUG_ASSERT(kbdev != NULL);
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/* zero-inited as lot of code assume it's zero'ed out on create */
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kctx = vzalloc(sizeof(*kctx));
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if (!kctx)
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goto out;
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/* creating a context is considered a disjoint event */
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kbase_disjoint_event(kbdev);
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kctx->kbdev = kbdev;
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kctx->as_nr = KBASEP_AS_NR_INVALID;
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atomic_set(&kctx->refcount, 0);
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if (is_compat)
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kbase_ctx_flag_set(kctx, KCTX_COMPAT);
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#ifdef CONFIG_MALI_TRACE_TIMELINE
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kctx->timeline.owner_tgid = task_tgid_nr(current);
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#endif
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atomic_set(&kctx->setup_complete, 0);
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atomic_set(&kctx->setup_in_progress, 0);
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spin_lock_init(&kctx->mm_update_lock);
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kctx->process_mm = NULL;
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atomic_set(&kctx->nonmapped_pages, 0);
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kctx->slots_pullable = 0;
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kctx->tgid = current->tgid;
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kctx->pid = current->pid;
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err = kbase_mem_pool_init(&kctx->mem_pool,
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kbdev->mem_pool_max_size_default,
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kctx->kbdev, &kbdev->mem_pool);
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if (err)
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goto free_kctx;
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err = kbase_mem_evictable_init(kctx);
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if (err)
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goto free_pool;
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atomic_set(&kctx->used_pages, 0);
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err = kbase_jd_init(kctx);
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if (err)
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goto deinit_evictable;
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err = kbasep_js_kctx_init(kctx);
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if (err)
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goto free_jd; /* safe to call kbasep_js_kctx_term in this case */
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err = kbase_event_init(kctx);
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if (err)
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goto free_jd;
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atomic_set(&kctx->drain_pending, 0);
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mutex_init(&kctx->reg_lock);
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INIT_LIST_HEAD(&kctx->waiting_soft_jobs);
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spin_lock_init(&kctx->waiting_soft_jobs_lock);
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#ifdef CONFIG_KDS
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INIT_LIST_HEAD(&kctx->waiting_kds_resource);
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#endif
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err = kbase_dma_fence_init(kctx);
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if (err)
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goto free_event;
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err = kbase_mmu_init(kctx);
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if (err)
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goto term_dma_fence;
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do {
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err = kbase_mem_pool_grow(&kctx->mem_pool,
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MIDGARD_MMU_BOTTOMLEVEL);
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if (err)
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goto pgd_no_mem;
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mutex_lock(&kctx->mmu_lock);
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kctx->pgd = kbase_mmu_alloc_pgd(kctx);
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mutex_unlock(&kctx->mmu_lock);
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} while (!kctx->pgd);
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kctx->aliasing_sink_page = kbase_mem_alloc_page(kctx->kbdev);
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if (!kctx->aliasing_sink_page)
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goto no_sink_page;
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init_waitqueue_head(&kctx->event_queue);
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kctx->cookies = KBASE_COOKIE_MASK;
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/* Make sure page 0 is not used... */
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err = kbase_region_tracker_init(kctx);
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if (err)
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goto no_region_tracker;
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err = kbase_sticky_resource_init(kctx);
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if (err)
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goto no_sticky;
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err = kbase_jit_init(kctx);
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if (err)
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goto no_jit;
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#ifdef CONFIG_GPU_TRACEPOINTS
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atomic_set(&kctx->jctx.work_id, 0);
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#endif
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#ifdef CONFIG_MALI_TRACE_TIMELINE
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atomic_set(&kctx->timeline.jd_atoms_in_flight, 0);
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#endif
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kctx->id = atomic_add_return(1, &(kbdev->ctx_num)) - 1;
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mutex_init(&kctx->vinstr_cli_lock);
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timer_setup(&kctx->soft_job_timeout,
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kbasep_soft_job_timeout_worker,
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0);
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return kctx;
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no_jit:
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kbase_gpu_vm_lock(kctx);
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kbase_sticky_resource_term(kctx);
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kbase_gpu_vm_unlock(kctx);
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no_sticky:
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kbase_region_tracker_term(kctx);
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no_region_tracker:
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kbase_mem_pool_free(&kctx->mem_pool, kctx->aliasing_sink_page, false);
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no_sink_page:
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/* VM lock needed for the call to kbase_mmu_free_pgd */
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kbase_gpu_vm_lock(kctx);
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kbase_mmu_free_pgd(kctx);
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kbase_gpu_vm_unlock(kctx);
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pgd_no_mem:
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kbase_mmu_term(kctx);
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term_dma_fence:
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kbase_dma_fence_term(kctx);
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free_event:
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kbase_event_cleanup(kctx);
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free_jd:
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/* Safe to call this one even when didn't initialize (assuming kctx was sufficiently zeroed) */
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kbasep_js_kctx_term(kctx);
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kbase_jd_exit(kctx);
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deinit_evictable:
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kbase_mem_evictable_deinit(kctx);
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free_pool:
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kbase_mem_pool_term(&kctx->mem_pool);
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free_kctx:
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vfree(kctx);
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out:
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return NULL;
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}
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KBASE_EXPORT_SYMBOL(kbase_create_context);
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static void kbase_reg_pending_dtor(struct kbase_va_region *reg)
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{
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dev_dbg(reg->kctx->kbdev->dev, "Freeing pending unmapped region\n");
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kbase_mem_phy_alloc_put(reg->cpu_alloc);
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kbase_mem_phy_alloc_put(reg->gpu_alloc);
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kfree(reg);
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}
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/**
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* kbase_destroy_context - Destroy a kernel base context.
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* @kctx: Context to destroy
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*
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* Calls kbase_destroy_os_context() to free OS specific structures.
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* Will release all outstanding regions.
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*/
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void kbase_destroy_context(struct kbase_context *kctx)
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{
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struct kbase_device *kbdev;
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int pages;
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unsigned long pending_regions_to_clean;
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unsigned long flags;
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KBASE_DEBUG_ASSERT(NULL != kctx);
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kbdev = kctx->kbdev;
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KBASE_DEBUG_ASSERT(NULL != kbdev);
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KBASE_TRACE_ADD(kbdev, CORE_CTX_DESTROY, kctx, NULL, 0u, 0u);
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/* Ensure the core is powered up for the destroy process */
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/* A suspend won't happen here, because we're in a syscall from a userspace
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* thread. */
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kbase_pm_context_active(kbdev);
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kbase_jd_zap_context(kctx);
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#ifdef CONFIG_DEBUG_FS
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/* Removing the rest of the debugfs entries here as we want to keep the
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* atom debugfs interface alive until all atoms have completed. This
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* is useful for debugging hung contexts. */
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debugfs_remove_recursive(kctx->kctx_dentry);
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#endif
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kbase_event_cleanup(kctx);
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/*
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* JIT must be terminated before the code below as it must be called
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* without the region lock being held.
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* The code above ensures no new JIT allocations can be made by
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* by the time we get to this point of context tear down.
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*/
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kbase_jit_term(kctx);
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kbase_gpu_vm_lock(kctx);
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kbase_sticky_resource_term(kctx);
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/* MMU is disabled as part of scheduling out the context */
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kbase_mmu_free_pgd(kctx);
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/* drop the aliasing sink page now that it can't be mapped anymore */
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kbase_mem_pool_free(&kctx->mem_pool, kctx->aliasing_sink_page, false);
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/* free pending region setups */
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pending_regions_to_clean = (~kctx->cookies) & KBASE_COOKIE_MASK;
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while (pending_regions_to_clean) {
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unsigned int cookie = __ffs(pending_regions_to_clean);
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BUG_ON(!kctx->pending_regions[cookie]);
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kbase_reg_pending_dtor(kctx->pending_regions[cookie]);
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kctx->pending_regions[cookie] = NULL;
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pending_regions_to_clean &= ~(1UL << cookie);
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}
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kbase_region_tracker_term(kctx);
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kbase_gpu_vm_unlock(kctx);
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/* Safe to call this one even when didn't initialize (assuming kctx was sufficiently zeroed) */
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kbasep_js_kctx_term(kctx);
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kbase_jd_exit(kctx);
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kbase_pm_context_idle(kbdev);
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kbase_dma_fence_term(kctx);
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mutex_lock(&kbdev->mmu_hw_mutex);
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spin_lock_irqsave(&kctx->kbdev->hwaccess_lock, flags);
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kbase_ctx_sched_remove_ctx(kctx);
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spin_unlock_irqrestore(&kctx->kbdev->hwaccess_lock, flags);
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mutex_unlock(&kbdev->mmu_hw_mutex);
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kbase_mmu_term(kctx);
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pages = atomic_read(&kctx->used_pages);
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if (pages != 0)
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dev_warn(kbdev->dev, "%s: %d pages in use!\n", __func__, pages);
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kbase_mem_evictable_deinit(kctx);
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kbase_mem_pool_term(&kctx->mem_pool);
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WARN_ON(atomic_read(&kctx->nonmapped_pages) != 0);
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vfree(kctx);
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}
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KBASE_EXPORT_SYMBOL(kbase_destroy_context);
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/**
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* kbase_context_set_create_flags - Set creation flags on a context
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* @kctx: Kbase context
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* @flags: Flags to set
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*
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* Return: 0 on success
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*/
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int kbase_context_set_create_flags(struct kbase_context *kctx, u32 flags)
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{
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int err = 0;
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struct kbasep_js_kctx_info *js_kctx_info;
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unsigned long irq_flags;
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KBASE_DEBUG_ASSERT(NULL != kctx);
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js_kctx_info = &kctx->jctx.sched_info;
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/* Validate flags */
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if (flags != (flags & BASE_CONTEXT_CREATE_KERNEL_FLAGS)) {
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err = -EINVAL;
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goto out;
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}
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mutex_lock(&js_kctx_info->ctx.jsctx_mutex);
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spin_lock_irqsave(&kctx->kbdev->hwaccess_lock, irq_flags);
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/* Translate the flags */
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if ((flags & BASE_CONTEXT_SYSTEM_MONITOR_SUBMIT_DISABLED) == 0)
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kbase_ctx_flag_clear(kctx, KCTX_SUBMIT_DISABLED);
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/* Latch the initial attributes into the Job Scheduler */
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kbasep_js_ctx_attr_set_initial_attrs(kctx->kbdev, kctx);
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spin_unlock_irqrestore(&kctx->kbdev->hwaccess_lock, irq_flags);
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mutex_unlock(&js_kctx_info->ctx.jsctx_mutex);
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out:
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return err;
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}
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KBASE_EXPORT_SYMBOL(kbase_context_set_create_flags);
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