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// SPDX-License-Identifier: GPL-2.0
/* Copyright 2018 Marty E. Plummer <hanetzer@startmail.com> */
/* Copyright 2019 Linaro, Ltd., Rob Herring <robh@kernel.org> */
/* Copyright 2019 Collabora ltd. */
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/pagemap.h>
#include <linux/pm_runtime.h>
#include <drm/panfrost_drm.h>
#include <drm/drm_drv.h>
#include <drm/drm_ioctl.h>
#include <drm/drm_syncobj.h>
#include <drm/drm_utils.h>
#include "panfrost_device.h"
#include "panfrost_devfreq.h"
#include "panfrost_gem.h"
#include "panfrost_mmu.h"
#include "panfrost_job.h"
#include "panfrost_gpu.h"
static int panfrost_ioctl_get_param(struct drm_device *ddev, void *data, struct drm_file *file)
{
struct drm_panfrost_get_param *param = data;
struct panfrost_device *pfdev = ddev->dev_private;
if (param->pad != 0)
return -EINVAL;
switch (param->param) {
case DRM_PANFROST_PARAM_GPU_PROD_ID:
param->value = pfdev->features.id;
break;
default:
return -EINVAL;
}
return 0;
}
static int panfrost_ioctl_create_bo(struct drm_device *dev, void *data,
struct drm_file *file)
{
int ret;
struct drm_gem_shmem_object *shmem;
struct drm_panfrost_create_bo *args = data;
if (!args->size || args->flags || args->pad)
return -EINVAL;
shmem = drm_gem_shmem_create_with_handle(file, dev, args->size,
&args->handle);
if (IS_ERR(shmem))
return PTR_ERR(shmem);
ret = panfrost_mmu_map(to_panfrost_bo(&shmem->base));
if (ret)
goto err_free;
args->offset = to_panfrost_bo(&shmem->base)->node.start << PAGE_SHIFT;
return 0;
err_free:
drm_gem_object_put_unlocked(&shmem->base);
return ret;
}
/**
* panfrost_lookup_bos() - Sets up job->bo[] with the GEM objects
* referenced by the job.
* @dev: DRM device
* @file_priv: DRM file for this fd
* @args: IOCTL args
* @job: job being set up
*
* Resolve handles from userspace to BOs and attach them to job.
*
* Note that this function doesn't need to unreference the BOs on
* failure, because that will happen at panfrost_job_cleanup() time.
*/
static int
panfrost_lookup_bos(struct drm_device *dev,
struct drm_file *file_priv,
struct drm_panfrost_submit *args,
struct panfrost_job *job)
{
job->bo_count = args->bo_handle_count;
if (!job->bo_count)
return 0;
job->implicit_fences = kvmalloc_array(job->bo_count,
sizeof(struct dma_fence *),
GFP_KERNEL | __GFP_ZERO);
if (!job->implicit_fences)
return -ENOMEM;
return drm_gem_objects_lookup(file_priv,
(void __user *)(uintptr_t)args->bo_handles,
job->bo_count, &job->bos);
}
/**
* panfrost_copy_in_sync() - Sets up job->in_fences[] with the sync objects
* referenced by the job.
* @dev: DRM device
* @file_priv: DRM file for this fd
* @args: IOCTL args
* @job: job being set up
*
* Resolve syncobjs from userspace to fences and attach them to job.
*
* Note that this function doesn't need to unreference the fences on
* failure, because that will happen at panfrost_job_cleanup() time.
*/
static int
panfrost_copy_in_sync(struct drm_device *dev,
struct drm_file *file_priv,
struct drm_panfrost_submit *args,
struct panfrost_job *job)
{
u32 *handles;
int ret = 0;
int i;
job->in_fence_count = args->in_sync_count;
if (!job->in_fence_count)
return 0;
job->in_fences = kvmalloc_array(job->in_fence_count,
sizeof(struct dma_fence *),
GFP_KERNEL | __GFP_ZERO);
if (!job->in_fences) {
DRM_DEBUG("Failed to allocate job in fences\n");
return -ENOMEM;
}
handles = kvmalloc_array(job->in_fence_count, sizeof(u32), GFP_KERNEL);
if (!handles) {
ret = -ENOMEM;
DRM_DEBUG("Failed to allocate incoming syncobj handles\n");
goto fail;
}
if (copy_from_user(handles,
(void __user *)(uintptr_t)args->in_syncs,
job->in_fence_count * sizeof(u32))) {
ret = -EFAULT;
DRM_DEBUG("Failed to copy in syncobj handles\n");
goto fail;
}
for (i = 0; i < job->in_fence_count; i++) {
ret = drm_syncobj_find_fence(file_priv, handles[i], 0, 0,
&job->in_fences[i]);
if (ret == -EINVAL)
goto fail;
}
fail:
kvfree(handles);
return ret;
}
static int panfrost_ioctl_submit(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct panfrost_device *pfdev = dev->dev_private;
struct drm_panfrost_submit *args = data;
struct drm_syncobj *sync_out = NULL;
struct panfrost_job *job;
int ret = 0;
if (!args->jc)
return -EINVAL;
if (args->requirements && args->requirements != PANFROST_JD_REQ_FS)
return -EINVAL;
if (args->out_sync > 0) {
sync_out = drm_syncobj_find(file, args->out_sync);
if (!sync_out)
return -ENODEV;
}
job = kzalloc(sizeof(*job), GFP_KERNEL);
if (!job) {
ret = -ENOMEM;
goto fail_out_sync;
}
kref_init(&job->refcount);
job->pfdev = pfdev;
job->jc = args->jc;
job->requirements = args->requirements;
job->flush_id = panfrost_gpu_get_latest_flush_id(pfdev);
job->file_priv = file->driver_priv;
ret = panfrost_copy_in_sync(dev, file, args, job);
if (ret)
goto fail_job;
ret = panfrost_lookup_bos(dev, file, args, job);
if (ret)
goto fail_job;
ret = panfrost_job_push(job);
if (ret)
goto fail_job;
/* Update the return sync object for the job */
if (sync_out)
drm_syncobj_replace_fence(sync_out, job->render_done_fence);
fail_job:
panfrost_job_put(job);
fail_out_sync:
if (sync_out)
drm_syncobj_put(sync_out);
return ret;
}
static int
panfrost_ioctl_wait_bo(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
long ret;
struct drm_panfrost_wait_bo *args = data;
struct drm_gem_object *gem_obj;
unsigned long timeout = drm_timeout_abs_to_jiffies(args->timeout_ns);
if (args->pad)
return -EINVAL;
gem_obj = drm_gem_object_lookup(file_priv, args->handle);
if (!gem_obj)
return -ENOENT;
ret = reservation_object_wait_timeout_rcu(gem_obj->resv, true,
true, timeout);
if (!ret)
ret = timeout ? -ETIMEDOUT : -EBUSY;
drm_gem_object_put_unlocked(gem_obj);
return ret;
}
static int panfrost_ioctl_mmap_bo(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_panfrost_mmap_bo *args = data;
struct drm_gem_object *gem_obj;
int ret;
if (args->flags != 0) {
DRM_INFO(
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