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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"
#include "panfrost_perfcnt.h"
static bool unstable_ioctls;
module_param_unsafe(unstable_ioctls, bool, 0600);
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;
#define PANFROST_FEATURE(name, member) \
case DRM_PANFROST_PARAM_ ## name: \
param->value = pfdev->features.member; \
break
#define PANFROST_FEATURE_ARRAY(name, member, max) \
case DRM_PANFROST_PARAM_ ## name ## 0 ... \
DRM_PANFROST_PARAM_ ## name ## max: \
param->value = pfdev->features.member[param->param - \
DRM_PANFROST_PARAM_ ## name ## 0]; \
break
switch (param->param) {
PANFROST_FEATURE(GPU_PROD_ID, id);
PANFROST_FEATURE(GPU_REVISION, revision);
PANFROST_FEATURE(SHADER_PRESENT, shader_present);
PANFROST_FEATURE(TILER_PRESENT, tiler_present);
PANFROST_FEATURE(L2_PRESENT, l2_present);
PANFROST_FEATURE(STACK_PRESENT, stack_present);
PANFROST_FEATURE(AS_PRESENT, as_present);
PANFROST_FEATURE(JS_PRESENT, js_present);
PANFROST_FEATURE(L2_FEATURES, l2_features);
PANFROST_FEATURE(CORE_FEATURES, core_features);
PANFROST_FEATURE(TILER_FEATURES, tiler_features);
PANFROST_FEATURE(MEM_FEATURES, mem_features);
PANFROST_FEATURE(MMU_FEATURES, mmu_features);
PANFROST_FEATURE(THREAD_FEATURES, thread_features);
PANFROST_FEATURE(MAX_THREADS, max_threads);
PANFROST_FEATURE(THREAD_MAX_WORKGROUP_SZ,
thread_max_workgroup_sz);
PANFROST_FEATURE(THREAD_MAX_BARRIER_SZ,
thread_max_barrier_sz);
PANFROST_FEATURE(COHERENCY_FEATURES, coherency_features);
PANFROST_FEATURE_ARRAY(TEXTURE_FEATURES, texture_features, 3);
PANFROST_FEATURE_ARRAY(JS_FEATURES, js_features, 15);
PANFROST_FEATURE(NR_CORE_GROUPS, nr_core_groups);
PANFROST_FEATURE(THREAD_TLS_ALLOC, thread_tls_alloc);
default:
return -EINVAL;
}
return 0;
}
static int panfrost_ioctl_create_bo(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct panfrost_gem_object *bo;
struct drm_panfrost_create_bo *args = data;
if (!args->size || args->pad ||
(args->flags & ~(PANFROST_BO_NOEXEC | PANFROST_BO_HEAP)))
return -EINVAL;
/* Heaps should never be executable */
if ((args->flags & PANFROST_BO_HEAP) &&
!(args->flags & PANFROST_BO_NOEXEC))
return -EINVAL;
bo = panfrost_gem_create_with_handle(file, dev, args->size, args->flags,
&args->handle);
if (IS_ERR(bo))
return PTR_ERR(bo);
args->offset = bo->node.start << PAGE_SHIFT;
return 0;
}
/**
* 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 = dma_resv_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("unknown mmap_bo flags: %d\n", args->flags);
return -EINVAL;
}
gem_obj = drm_gem_object_lookup(file_priv, args->handle);
if (!gem_obj) {
DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
return -ENOENT;
}
/* Don't allow mmapping of heap objects as pages are not pinned. */
if (to_panfrost_bo(gem_obj)->is_heap)
return -EINVAL;
ret = drm_gem_create_mmap_offset(gem_obj);
if (ret == 0)
args->offset = drm_vma_node_offset_addr(&gem_obj->vma_node);
drm_gem_object_put_unlocked(gem_obj);
return ret;
}
static int panfrost_ioctl_get_bo_offset(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_panfrost_get_bo_offset *args = data;
struct drm_gem_object *gem_obj;
struct panfrost_gem_object *bo;
gem_obj = drm_gem_object_lookup(file_priv, args->handle);
if (!gem_obj) {
DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
return -ENOENT;
}
bo = to_panfrost_bo(gem_obj);
args->offset = bo->node.start << PAGE_SHIFT;
drm_gem_object_put_unlocked(gem_obj);
return 0;
}
static int panfrost_ioctl_madvise(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_panfrost_madvise *args = data;
struct panfrost_device *pfdev = dev->dev_private;
struct drm_gem_object *gem_obj;
gem_obj = drm_gem_object_lookup(file_priv, args->handle);
if (!gem_obj) {
DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
return -ENOENT;
}
args->retained = drm_gem_shmem_madvise(gem_obj, args->madv);
if (args->retained) {
struct panfrost_gem_object *bo = to_panfrost_bo(gem_obj);
mutex_lock(&pfdev->shrinker_lock);
if (args->madv == PANFROST_MADV_DONTNEED)
list_add_tail(&bo->base.madv_list, &pfdev->shrinker_list);
else if (args->madv == PANFROST_MADV_WILLNEED)
list_del_init(&bo->base.madv_list);
mutex_unlock(&pfdev->shrinker_lock);
}
drm_gem_object_put_unlocked(gem_obj);
return 0;
}
int panfrost_unstable_ioctl_check(void)
{
if (!unstable_ioctls)
return -ENOSYS;
return 0;
}
#define PFN_4G (SZ_4G >> PAGE_SHIFT)
#define PFN_4G_MASK (PFN_4G - 1)
#define PFN_16M (SZ_16M >> PAGE_SHIFT)
static void panfrost_drm_mm_color_adjust(const struct drm_mm_node *node,
unsigned long color,
u64 *start, u64 *end)
{
/* Executable buffers can't start or end on a 4GB boundary */
if (!(color & PANFROST_BO_NOEXEC)) {
u64 next_seg;
if ((*start & PFN_4G_MASK) == 0)
(*start)++;
if ((*end & PFN_4G_MASK) == 0)
(*end)--;
next_seg = ALIGN(*start, PFN_4G);
if (next_seg - *start <= PFN_16M)
*start = next_seg + 1;
*end = min(*end, ALIGN(*start, PFN_4G) - 1);
}
}
static int
panfrost_open(struct drm_device *dev, struct drm_file *file)
{
int ret;
struct panfrost_device *pfdev = dev->dev_private;
struct panfrost_file_priv *panfrost_priv;
panfrost_priv = kzalloc(sizeof(*panfrost_priv), GFP_KERNEL);
if (!panfrost_priv)
return -ENOMEM;
panfrost_priv->pfdev = pfdev;
file->driver_priv = panfrost_priv;
spin_lock_init(&panfrost_priv->mm_lock);
/* 4G enough for now. can be 48-bit */
drm_mm_init(&panfrost_priv->mm, SZ_32M >> PAGE_SHIFT, (SZ_4G - SZ_32M) >> PAGE_SHIFT);
panfrost_priv->mm.color_adjust = panfrost_drm_mm_color_adjust;
ret = panfrost_mmu_pgtable_alloc(panfrost_priv);
if (ret)
goto err_pgtable;
ret = panfrost_job_open(panfrost_priv);
if (ret)
goto err_job;
return 0;
err_job:
panfrost_mmu_pgtable_free(panfrost_priv);
err_pgtable:
drm_mm_takedown(&panfrost_priv->mm);
kfree(panfrost_priv);
return ret;
}
static void
panfrost_postclose(struct drm_device *dev, struct drm_file *file)
{
struct panfrost_file_priv *panfrost_priv = file->driver_priv;
panfrost_perfcnt_close(panfrost_priv);
panfrost_job_close(panfrost_priv);
panfrost_mmu_pgtable_free(panfrost_priv);
drm_mm_takedown(&panfrost_priv->mm);
kfree(panfrost_priv);
}
/* DRM_AUTH is required on SUBMIT for now, while all clients share a single
* address space. Note that render nodes would be able to submit jobs that
* could access BOs from clients authenticated with the master node.
*/
static const struct drm_ioctl_desc panfrost_drm_driver_ioctls[] = {
#define PANFROST_IOCTL(n, func, flags) \
DRM_IOCTL_DEF_DRV(PANFROST_##n, panfrost_ioctl_##func, flags)
PANFROST_IOCTL(SUBMIT, submit, DRM_RENDER_ALLOW | DRM_AUTH),
PANFROST_IOCTL(WAIT_BO, wait_bo, DRM_RENDER_ALLOW),
PANFROST_IOCTL(CREATE_BO, create_bo, DRM_RENDER_ALLOW),
PANFROST_IOCTL(MMAP_BO, mmap_bo, DRM_RENDER_ALLOW),
PANFROST_IOCTL(GET_PARAM, get_param, DRM_RENDER_ALLOW),
PANFROST_IOCTL(GET_BO_OFFSET, get_bo_offset, DRM_RENDER_ALLOW),
PANFROST_IOCTL(PERFCNT_ENABLE, perfcnt_enable, DRM_RENDER_ALLOW),
PANFROST_IOCTL(PERFCNT_DUMP, perfcnt_dump, DRM_RENDER_ALLOW),
PANFROST_IOCTL(MADVISE, madvise, DRM_RENDER_ALLOW),
};
DEFINE_DRM_GEM_FOPS(panfrost_drm_driver_fops);
/*
* Panfrost driver version:
* - 1.0 - initial interface
* - 1.1 - adds HEAP and NOEXEC flags for CREATE_BO
*/
static struct drm_driver panfrost_drm_driver = {
.driver_features = DRIVER_RENDER | DRIVER_GEM | DRIVER_SYNCOBJ,
.open = panfrost_open,
.postclose = panfrost_postclose,
.ioctls = panfrost_drm_driver_ioctls,
.num_ioctls = ARRAY_SIZE(panfrost_drm_driver_ioctls),
.fops = &panfrost_drm_driver_fops,
.name = "panfrost",
.desc = "panfrost DRM",
.date = "20180908",
.major = 1,
.minor = 1,
.gem_create_object = panfrost_gem_create_object,
.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
.gem_prime_import_sg_table = panfrost_gem_prime_import_sg_table,
.gem_prime_mmap = drm_gem_prime_mmap,
};
static int panfrost_probe(struct platform_device *pdev)
{
struct panfrost_device *pfdev;
struct drm_device *ddev;
int err;
pfdev = devm_kzalloc(&pdev->dev, sizeof(*pfdev), GFP_KERNEL);
if (!pfdev)
return -ENOMEM;
pfdev->pdev = pdev;
pfdev->dev = &pdev->dev;
platform_set_drvdata(pdev, pfdev);
/* Allocate and initialze the DRM device. */
ddev = drm_dev_alloc(&panfrost_drm_driver, &pdev->dev);
if (IS_ERR(ddev))
return PTR_ERR(ddev);
ddev->dev_private = pfdev;
pfdev->ddev = ddev;
mutex_init(&pfdev->shrinker_lock);
INIT_LIST_HEAD(&pfdev->shrinker_list);
err = panfrost_device_init(pfdev);
if (err) {
if (err != -EPROBE_DEFER)
dev_err(&pdev->dev, "Fatal error during GPU init\n");
goto err_out0;
}
err = panfrost_devfreq_init(pfdev);
if (err) {
if (err != -EPROBE_DEFER)
dev_err(&pdev->dev, "Fatal error during devfreq init\n");
goto err_out1;
}
pm_runtime_set_active(pfdev->dev);
pm_runtime_mark_last_busy(pfdev->dev);
pm_runtime_enable(pfdev->dev);
pm_runtime_set_autosuspend_delay(pfdev->dev, 50); /* ~3 frames */
pm_runtime_use_autosuspend(pfdev->dev);
/*
* Register the DRM device with the core and the connectors with
* sysfs
*/
err = drm_dev_register(ddev, 0);
if (err < 0)
goto err_out2;
panfrost_gem_shrinker_init(ddev);
return 0;
err_out2:
panfrost_devfreq_fini(pfdev);
err_out1:
panfrost_device_fini(pfdev);
err_out0:
pm_runtime_disable(pfdev->dev);
drm_dev_put(ddev);
return err;
}
static int panfrost_remove(struct platform_device *pdev)
{
struct panfrost_device *pfdev = platform_get_drvdata(pdev);
struct drm_device *ddev = pfdev->ddev;
drm_dev_unregister(ddev);
panfrost_gem_shrinker_cleanup(ddev);
pm_runtime_get_sync(pfdev->dev);
panfrost_devfreq_fini(pfdev);
panfrost_device_fini(pfdev);
pm_runtime_put_sync_suspend(pfdev->dev);
pm_runtime_disable(pfdev->dev);
drm_dev_put(ddev);
return 0;
}
static const struct of_device_id dt_match[] = {
{ .compatible = "arm,mali-t604" },
{ .compatible = "arm,mali-t624" },
{ .compatible = "arm,mali-t628" },
{ .compatible = "arm,mali-t720" },
{ .compatible = "arm,mali-t760" },
{ .compatible = "arm,mali-t820" },
{ .compatible = "arm,mali-t830" },
{ .compatible = "arm,mali-t860" },
{ .compatible = "arm,mali-t880" },
{}
};
MODULE_DEVICE_TABLE(of, dt_match);
static const struct dev_pm_ops panfrost_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
SET_RUNTIME_PM_OPS(panfrost_device_suspend, panfrost_device_resume, NULL)
};
static struct platform_driver panfrost_driver = {
.probe = panfrost_probe,
.remove = panfrost_remove,
.driver = {
.name = "panfrost",
.pm = &panfrost_pm_ops,
.of_match_table = dt_match,
},
};
module_platform_driver(panfrost_driver);
MODULE_AUTHOR("Panfrost Project Developers");
MODULE_DESCRIPTION("Panfrost DRM Driver");
MODULE_LICENSE("GPL v2");
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