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/*
*
* (C) COPYRIGHT 2010-2013 ARM Limited. All rights reserved.
*
* This program is free software and is provided to you under the terms of the
* GNU General Public License version 2 as published by the Free Software
* Foundation, and any use by you of this program is subject to the terms
* of such GNU licence.
*
* A copy of the licence is included with the program, and can also be obtained
* from Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
/**
* @file mali_kbase_context.c
* Base kernel context APIs
*/
#include <kbase/src/common/mali_kbase.h>
#include <kbase/src/common/mali_midg_regmap.h>
#define MEMPOOL_PAGES 16384
/**
* @brief Create a kernel base context.
*
* Allocate and init a kernel base context. Calls
* kbase_create_os_context() to setup OS specific structures.
*/
kbase_context *kbase_create_context(kbase_device *kbdev)
{
kbase_context *kctx;
mali_error mali_err;
KBASE_DEBUG_ASSERT(kbdev != NULL);
/* zero-inited as lot of code assume it's zero'ed out on create */
kctx = vzalloc(sizeof(*kctx));
if (!kctx)
goto out;
kctx->kbdev = kbdev;
kctx->as_nr = KBASEP_AS_NR_INVALID;
#ifdef CONFIG_MALI_TRACE_TIMELINE
kctx->timeline.owner_tgid = task_tgid_nr(current);
#endif
atomic_set(&kctx->setup_complete, 0);
atomic_set(&kctx->setup_in_progress, 0);
kctx->keep_gpu_powered = MALI_FALSE;
spin_lock_init(&kctx->mm_update_lock);
kctx->process_mm = NULL;
atomic_set(&kctx->nonmapped_pages, 0);
if (MALI_ERROR_NONE != kbase_mem_allocator_init(&kctx->osalloc, MEMPOOL_PAGES))
goto free_kctx;
kctx->pgd_allocator = &kctx->osalloc;
if (kbase_mem_usage_init(&kctx->usage, kctx->kbdev->memdev.per_process_memory_limit >> PAGE_SHIFT))
goto free_allocator;
if (kbase_jd_init(kctx))
goto free_memctx;
mali_err = kbasep_js_kctx_init(kctx);
if (MALI_ERROR_NONE != mali_err)
goto free_jd; /* safe to call kbasep_js_kctx_term in this case */
mali_err = kbase_event_init(kctx);
if (MALI_ERROR_NONE != mali_err)
goto free_jd;
mutex_init(&kctx->reg_lock);
INIT_LIST_HEAD(&kctx->waiting_soft_jobs);
#ifdef CONFIG_KDS
INIT_LIST_HEAD(&kctx->waiting_kds_resource);
#endif
mali_err = kbase_mmu_init(kctx);
if (MALI_ERROR_NONE != mali_err)
goto free_event;
kctx->pgd = kbase_mmu_alloc_pgd(kctx);
if (!kctx->pgd)
goto free_mmu;
if (kbase_create_os_context(&kctx->osctx))
goto free_pgd;
/* Make sure page 0 is not used... */
if (kbase_region_tracker_init(kctx))
goto free_osctx;
#ifdef CONFIG_GPU_TRACEPOINTS
atomic_set(&kctx->jctx.work_id, 0);
#endif
#ifdef CONFIG_MALI_TRACE_TIMELINE
atomic_set(&kctx->timeline.jd_atoms_in_flight, 0);
#endif
return kctx;
free_osctx:
kbase_destroy_os_context(&kctx->osctx);
free_pgd:
kbase_mmu_free_pgd(kctx);
free_mmu:
kbase_mmu_term(kctx);
free_event:
kbase_event_cleanup(kctx);
free_jd:
/* Safe to call this one even when didn't initialize (assuming kctx was sufficiently zeroed) */
kbasep_js_kctx_term(kctx);
kbase_jd_exit(kctx);
free_memctx:
kbase_mem_usage_term(&kctx->usage);
free_allocator:
kbase_mem_allocator_term(&kctx->osalloc);
free_kctx:
vfree(kctx);
out:
return NULL;
}
KBASE_EXPORT_SYMBOL(kbase_create_context)
/**
* @brief Destroy a kernel base context.
*
* Destroy a kernel base context. Calls kbase_destroy_os_context() to
* free OS specific structures. Will release all outstanding regions.
*/
void kbase_destroy_context(kbase_context *kctx)
{
kbase_device *kbdev;
KBASE_DEBUG_ASSERT(NULL != kctx);
kbdev = kctx->kbdev;
KBASE_DEBUG_ASSERT(NULL != kbdev);
KBASE_TRACE_ADD(kbdev, CORE_CTX_DESTROY, kctx, NULL, 0u, 0u);
/* Ensure the core is powered up for the destroy process */
/* A suspend won't happen here, because we're in a syscall from a userspace
* thread. */
kbase_pm_context_active(kbdev);
if (kbdev->hwcnt.kctx == kctx) {
/* disable the use of the hw counters if the app didn't use the API correctly or crashed */
KBASE_TRACE_ADD(kbdev, CORE_CTX_HWINSTR_TERM, kctx, NULL, 0u, 0u);
KBASE_DEBUG_PRINT_WARN(KBASE_CTX, "The privileged process asking for instrumentation forgot to disable it " "before exiting. Will end instrumentation for them");
kbase_instr_hwcnt_disable(kctx);
}
kbase_jd_zap_context(kctx);
kbase_event_cleanup(kctx);
kbase_gpu_vm_lock(kctx);
/* MMU is disabled as part of scheduling out the context */
kbase_mmu_free_pgd(kctx);
kbase_region_tracker_term(kctx);
kbase_destroy_os_context(&kctx->osctx);
kbase_gpu_vm_unlock(kctx);
/* Safe to call this one even when didn't initialize (assuming kctx was sufficiently zeroed) */
kbasep_js_kctx_term(kctx);
kbase_jd_exit(kctx);
kbase_pm_context_idle(kbdev);
kbase_mmu_term(kctx);
kbase_mem_usage_term(&kctx->usage);
if (kctx->keep_gpu_powered) {
atomic_dec(&kbdev->keep_gpu_powered_count);
kbase_pm_context_idle(kbdev);
}
kbase_mem_allocator_term(&kctx->osalloc);
WARN_ON(atomic_read(&kctx->nonmapped_pages) != 0);
vfree(kctx);
}
KBASE_EXPORT_SYMBOL(kbase_destroy_context)
/**
* Set creation flags on a context
*/
mali_error kbase_context_set_create_flags(kbase_context *kctx, u32 flags)
{
mali_error err = MALI_ERROR_NONE;
kbasep_js_kctx_info *js_kctx_info;
KBASE_DEBUG_ASSERT(NULL != kctx);
js_kctx_info = &kctx->jctx.sched_info;
/* Validate flags */
if (flags != (flags & BASE_CONTEXT_CREATE_KERNEL_FLAGS)) {
err = MALI_ERROR_FUNCTION_FAILED;
goto out;
}
mutex_lock(&js_kctx_info->ctx.jsctx_mutex);
/* Translate the flags */
if ((flags & BASE_CONTEXT_SYSTEM_MONITOR_SUBMIT_DISABLED) == 0)
js_kctx_info->ctx.flags &= ~((u32) KBASE_CTX_FLAG_SUBMIT_DISABLED);
if ((flags & BASE_CONTEXT_HINT_ONLY_COMPUTE) != 0)
js_kctx_info->ctx.flags |= (u32) KBASE_CTX_FLAG_HINT_ONLY_COMPUTE;
/* Latch the initial attributes into the Job Scheduler */
kbasep_js_ctx_attr_set_initial_attrs(kctx->kbdev, kctx);
mutex_unlock(&js_kctx_info->ctx.jsctx_mutex);
out:
return err;
}
KBASE_EXPORT_SYMBOL(kbase_context_set_create_flags)
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