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// SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
/*
*
* (C) COPYRIGHT 2019-2023 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 license.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, you can access it online at
* http://www.gnu.org/licenses/gpl-2.0.html.
*
*/
/*
* Base kernel context APIs for CSF GPUs
*/
#include <context/mali_kbase_context_internal.h>
#include <gpu/mali_kbase_gpu_regmap.h>
#include <mali_kbase.h>
#include <mali_kbase_mem_linux.h>
#include <mali_kbase_mem_pool_group.h>
#include <mmu/mali_kbase_mmu.h>
#include <tl/mali_kbase_timeline.h>
#include <backend/gpu/mali_kbase_pm_internal.h>
#if IS_ENABLED(CONFIG_DEBUG_FS)
#include <csf/mali_kbase_csf_csg_debugfs.h>
#include <csf/mali_kbase_csf_kcpu_debugfs.h>
#include <csf/mali_kbase_csf_sync_debugfs.h>
#include <csf/mali_kbase_csf_tiler_heap_debugfs.h>
#include <csf/mali_kbase_csf_cpu_queue_debugfs.h>
#include <mali_kbase_debug_mem_view.h>
#include <mali_kbase_debug_mem_zones.h>
#include <mali_kbase_debug_mem_allocs.h>
#include <mali_kbase_mem_pool_debugfs.h>
void kbase_context_debugfs_init(struct kbase_context *const kctx)
{
kbase_debug_mem_view_init(kctx);
kbase_debug_mem_zones_init(kctx);
kbase_debug_mem_allocs_init(kctx);
kbase_mem_pool_debugfs_init(kctx->kctx_dentry, kctx);
kbase_jit_debugfs_init(kctx);
kbase_csf_queue_group_debugfs_init(kctx);
kbase_csf_kcpu_debugfs_init(kctx);
kbase_csf_sync_debugfs_init(kctx);
kbase_csf_tiler_heap_debugfs_init(kctx);
kbase_csf_tiler_heap_total_debugfs_init(kctx);
kbase_csf_cpu_queue_debugfs_init(kctx);
}
KBASE_EXPORT_SYMBOL(kbase_context_debugfs_init);
void kbase_context_debugfs_term(struct kbase_context *const kctx)
{
debugfs_remove_recursive(kctx->kctx_dentry);
}
KBASE_EXPORT_SYMBOL(kbase_context_debugfs_term);
#else
void kbase_context_debugfs_init(struct kbase_context *const kctx)
{
CSTD_UNUSED(kctx);
}
KBASE_EXPORT_SYMBOL(kbase_context_debugfs_init);
void kbase_context_debugfs_term(struct kbase_context *const kctx)
{
CSTD_UNUSED(kctx);
}
KBASE_EXPORT_SYMBOL(kbase_context_debugfs_term);
#endif /* CONFIG_DEBUG_FS */
static void kbase_context_free(struct kbase_context *kctx)
{
kbase_timeline_post_kbase_context_destroy(kctx);
vfree(kctx);
}
static const struct kbase_context_init context_init[] = {
{ NULL, kbase_context_free, NULL },
{ kbase_context_common_init, kbase_context_common_term,
"Common context initialization failed" },
{ kbase_context_mem_pool_group_init, kbase_context_mem_pool_group_term,
"Memory pool group initialization failed" },
{ kbase_mem_evictable_init, kbase_mem_evictable_deinit,
"Memory evictable initialization failed" },
{ kbase_context_mmu_init, kbase_context_mmu_term,
"MMU initialization failed" },
{ kbase_context_mem_alloc_page, kbase_context_mem_pool_free,
"Memory alloc page failed" },
{ kbase_region_tracker_init, kbase_region_tracker_term,
"Region tracker initialization failed" },
{ kbase_sticky_resource_init, kbase_context_sticky_resource_term,
"Sticky resource initialization failed" },
{ kbase_jit_init, kbase_jit_term, "JIT initialization failed" },
{ kbasep_platform_context_init, kbasep_platform_context_term,
"Platform callback for kctx initialization failed" },
{ kbase_csf_ctx_init, kbase_csf_ctx_term,
"CSF context initialization failed" },
{ kbase_context_add_to_dev_list, kbase_context_remove_from_dev_list,
"Adding kctx to device failed" },
};
static void kbase_context_term_partial(
struct kbase_context *kctx,
unsigned int i)
{
while (i-- > 0) {
if (context_init[i].term)
context_init[i].term(kctx);
}
}
struct kbase_context *kbase_create_context(struct kbase_device *kbdev,
bool is_compat,
base_context_create_flags const flags,
unsigned long const api_version,
struct kbase_file *const kfile)
{
struct kbase_context *kctx;
unsigned int i = 0;
if (WARN_ON(!kbdev))
return NULL;
/* Validate flags */
if (WARN_ON(flags != (flags & BASEP_CONTEXT_CREATE_KERNEL_FLAGS)))
return NULL;
/* zero-inited as lot of code assume it's zero'ed out on create */
kctx = vzalloc(sizeof(*kctx));
if (WARN_ON(!kctx))
return NULL;
kctx->kbdev = kbdev;
kctx->api_version = api_version;
kctx->kfile = kfile;
kctx->create_flags = flags;
memcpy(kctx->comm, current->comm, sizeof(current->comm));
if (is_compat)
kbase_ctx_flag_set(kctx, KCTX_COMPAT);
#if defined(CONFIG_64BIT)
else
kbase_ctx_flag_set(kctx, KCTX_FORCE_SAME_VA);
#endif /* defined(CONFIG_64BIT) */
for (i = 0; i < ARRAY_SIZE(context_init); i++) {
int err = 0;
if (context_init[i].init)
err = context_init[i].init(kctx);
if (err) {
dev_err(kbdev->dev, "%s error = %d\n",
context_init[i].err_mes, err);
/* kctx should be freed by kbase_context_free().
* Otherwise it will result in memory leak.
*/
WARN_ON(i == 0);
kbase_context_term_partial(kctx, i);
return NULL;
}
}
return kctx;
}
KBASE_EXPORT_SYMBOL(kbase_create_context);
void kbase_destroy_context(struct kbase_context *kctx)
{
struct kbase_device *kbdev;
int err;
if (WARN_ON(!kctx))
return;
kbdev = kctx->kbdev;
if (WARN_ON(!kbdev))
return;
/* Context termination could happen whilst the system suspend of
* the GPU device is ongoing or has completed. It has been seen on
* Customer side that a hang could occur if context termination is
* not blocked until the resume of GPU device.
*/
while (kbase_pm_context_active_handle_suspend(
kbdev, KBASE_PM_SUSPEND_HANDLER_DONT_INCREASE)) {
dev_info(kbdev->dev,
"Suspend in progress when destroying context");
wait_event(kbdev->pm.resume_wait,
!kbase_pm_is_suspending(kbdev));
}
/*
* Taking a pm reference does not guarantee that the GPU has finished powering up.
* It's possible that the power up has been deferred until after a scheduled power down.
* We must wait here for the L2 to be powered up, and holding a pm reference guarantees that
* it will not be powered down afterwards.
*/
err = kbase_pm_wait_for_l2_powered(kbdev);
if (err) {
dev_err(kbdev->dev, "Wait for L2 power up failed on term of ctx %d_%d",
kctx->tgid, kctx->id);
}
/* Have synchronized against the System suspend and incremented the
* pm.active_count. So any subsequent invocation of System suspend
* callback would get blocked.
* If System suspend callback was already in progress then the above loop
* would have waited till the System resume callback has begun.
* So wait for the System resume callback to also complete as we want to
* avoid context termination during System resume also.
*/
wait_event(kbdev->pm.resume_wait, !kbase_pm_is_resuming(kbdev));
kbase_mem_pool_group_mark_dying(&kctx->mem_pools);
kbase_context_term_partial(kctx, ARRAY_SIZE(context_init));
kbase_pm_context_idle(kbdev);
}
KBASE_EXPORT_SYMBOL(kbase_destroy_context);
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