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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2015-2018 Etnaviv Project
*/
#include <linux/component.h>
#include <linux/dma-mapping.h>
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/uaccess.h>
#include <drm/drm_debugfs.h>
#include <drm/drm_drv.h>
#include <drm/drm_file.h>
#include <drm/drm_ioctl.h>
#include <drm/drm_of.h>
#include <drm/drm_prime.h>
#include "etnaviv_cmdbuf.h"
#include "etnaviv_drv.h"
#include "etnaviv_gpu.h"
#include "etnaviv_gem.h"
#include "etnaviv_mmu.h"
#include "etnaviv_perfmon.h"
/*
* DRM operations:
*/
static void load_gpu(struct drm_device *dev)
{
struct etnaviv_drm_private *priv = dev->dev_private;
unsigned int i;
for (i = 0; i < ETNA_MAX_PIPES; i++) {
struct etnaviv_gpu *g = priv->gpu[i];
if (g) {
int ret;
ret = etnaviv_gpu_init(g);
if (ret)
priv->gpu[i] = NULL;
}
}
}
static int etnaviv_open(struct drm_device *dev, struct drm_file *file)
{
struct etnaviv_drm_private *priv = dev->dev_private;
struct etnaviv_file_private *ctx;
int ret, i;
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
ctx->mmu = etnaviv_iommu_context_init(priv->mmu_global,
priv->cmdbuf_suballoc);
if (!ctx->mmu) {
ret = -ENOMEM;
goto out_free;
}
for (i = 0; i < ETNA_MAX_PIPES; i++) {
struct etnaviv_gpu *gpu = priv->gpu[i];
struct drm_sched_rq *rq;
if (gpu) {
rq = &gpu->sched.sched_rq[DRM_SCHED_PRIORITY_NORMAL];
drm_sched_entity_init(&ctx->sched_entity[i],
&rq, 1, NULL);
}
}
file->driver_priv = ctx;
return 0;
out_free:
kfree(ctx);
return ret;
}
static void etnaviv_postclose(struct drm_device *dev, struct drm_file *file)
{
struct etnaviv_drm_private *priv = dev->dev_private;
struct etnaviv_file_private *ctx = file->driver_priv;
unsigned int i;
for (i = 0; i < ETNA_MAX_PIPES; i++) {
struct etnaviv_gpu *gpu = priv->gpu[i];
if (gpu)
drm_sched_entity_destroy(&ctx->sched_entity[i]);
}
etnaviv_iommu_context_put(ctx->mmu);
kfree(ctx);
}
/*
* DRM debugfs:
*/
#ifdef CONFIG_DEBUG_FS
static int etnaviv_gem_show(struct drm_device *dev, struct seq_file *m)
{
struct etnaviv_drm_private *priv = dev->dev_private;
etnaviv_gem_describe_objects(priv, m);
return 0;
}
static int etnaviv_mm_show(struct drm_device *dev, struct seq_file *m)
{
struct drm_printer p = drm_seq_file_printer(m);
read_lock(&dev->vma_offset_manager->vm_lock);
drm_mm_print(&dev->vma_offset_manager->vm_addr_space_mm, &p);
read_unlock(&dev->vma_offset_manager->vm_lock);
return 0;
}
static int etnaviv_mmu_show(struct etnaviv_gpu *gpu, struct seq_file *m)
{
struct drm_printer p = drm_seq_file_printer(m);
struct etnaviv_iommu_context *mmu_context;
seq_printf(m, "Active Objects (%s):\n", dev_name(gpu->dev));
/*
* Lock the GPU to avoid a MMU context switch just now and elevate
* the refcount of the current context to avoid it disappearing from
* under our feet.
*/
mutex_lock(&gpu->lock);
mmu_context = gpu->mmu_context;
if (mmu_context)
etnaviv_iommu_context_get(mmu_context);
mutex_unlock(&gpu->lock);
if (!mmu_context)
return 0;
mutex_lock(&mmu_context->lock);
drm_mm_print(&mmu_context->mm, &p);
mutex_unlock(&mmu_context->lock);
etnaviv_iommu_context_put(mmu_context);
return 0;
}
static void etnaviv_buffer_dump(struct etnaviv_gpu *gpu, struct seq_file *m)
{
struct etnaviv_cmdbuf *buf = &gpu->buffer;
u32 size = buf->size;
u32 *ptr = buf->vaddr;
u32 i;
seq_printf(m, "virt %p - phys 0x%llx - free 0x%08x\n",
buf->vaddr, (u64)etnaviv_cmdbuf_get_pa(buf),
size - buf->user_size);
for (i = 0; i < size / 4; i++) {
if (i && !(i % 4))
seq_puts(m, "\n");
if (i % 4 == 0)
seq_printf(m, "\t0x%p: ", ptr + i);
seq_printf(m, "%08x ", *(ptr + i));
}
seq_puts(m, "\n");
}
static int etnaviv_ring_show(struct etnaviv_gpu *gpu, struct seq_file *m)
{
seq_printf(m, "Ring Buffer (%s): ", dev_name(gpu->dev));
mutex_lock(&gpu->lock);
etnaviv_buffer_dump(gpu, m);
mutex_unlock(&gpu->lock);
return 0;
}
static int show_unlocked(struct seq_file *m, void *arg)
{
struct drm_info_node *node = (struct drm_info_node *) m->private;
struct drm_device *dev = node->minor->dev;
int (*show)(struct drm_device *dev, struct seq_file *m) =
node->info_ent->data;
return show(dev, m);
}
static int show_each_gpu(struct seq_file *m, void *arg)
{
struct drm_info_node *node = (struct drm_info_node *) m->private;
struct drm_device *dev = node->minor->dev;
struct etnaviv_drm_private *priv = dev->dev_private;
struct etnaviv_gpu *gpu;
int (*show)(struct etnaviv_gpu *gpu, struct seq_file *m) =
node->info_ent->data;
unsigned int i;
int ret = 0;
for (i = 0; i < ETNA_MAX_PIPES; i++) {
gpu = priv->gpu[i];
if (!gpu)
continue;
ret = show(gpu, m);
if (ret < 0)
break;
}
return ret;
}
static struct drm_info_list etnaviv_debugfs_list[] = {
{"gpu", show_each_gpu, 0, etnaviv_gpu_debugfs},
{"gem", show_unlocked, 0, etnaviv_gem_show},
{ "mm", show_unlocked, 0, etnaviv_mm_show },
{"mmu", show_each_gpu, 0, etnaviv_mmu_show},
{"ring", show_each_gpu, 0, etnaviv_ring_show},
};
static int etnaviv_debugfs_init(struct drm_minor *minor)
{
struct drm_device *dev = minor->dev;
int ret;
ret = drm_debugfs_create_files(etnaviv_debugfs_list,
ARRAY_SIZE(etnaviv_debugfs_list),
minor->debugfs_root, minor);
if (ret) {
dev_err(dev->dev, "could not install etnaviv_debugfs_list\n");
return ret;
}
return ret;
}
#endif
/*
* DRM ioctls:
*/
static int etnaviv_ioctl_get_param(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct etnaviv_drm_private *priv = dev->dev_private;
struct drm_etnaviv_param *args = data;
struct etnaviv_gpu *gpu;
if (args->pipe >= ETNA_MAX_PIPES)
return -EINVAL;
gpu = priv->gpu[args->pipe];
if (!gpu)
return -ENXIO;
return etnaviv_gpu_get_param(gpu, args->param, &args->value);
}
static int etnaviv_ioctl_gem_new(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct drm_etnaviv_gem_new *args = data;
if (args->flags & ~(ETNA_BO_CACHED | ETNA_BO_WC | ETNA_BO_UNCACHED |
ETNA_BO_FORCE_MMU))
return -EINVAL;
return etnaviv_gem_new_handle(dev, file, args->size,
args->flags, &args->handle);
}
#define TS(t) ((struct timespec){ \
.tv_sec = (t).tv_sec, \
.tv_nsec = (t).tv_nsec \
})
static int etnaviv_ioctl_gem_cpu_prep(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct drm_etnaviv_gem_cpu_prep *args = data;
struct drm_gem_object *obj;
int ret;
if (args->op & ~(ETNA_PREP_READ | ETNA_PREP_WRITE | ETNA_PREP_NOSYNC))
return -EINVAL;
obj = drm_gem_object_lookup(file, args->handle);
if (!obj)
return -ENOENT;
ret = etnaviv_gem_cpu_prep(obj, args->op, &TS(args->timeout));
drm_gem_object_put_unlocked(obj);
return ret;
}
static int etnaviv_ioctl_gem_cpu_fini(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct drm_etnaviv_gem_cpu_fini *args = data;
struct drm_gem_object *obj;
int ret;
if (args->flags)
return -EINVAL;
obj = drm_gem_object_lookup(file, args->handle);
if (!obj)
return -ENOENT;
ret = etnaviv_gem_cpu_fini(obj);
drm_gem_object_put_unlocked(obj);
return ret;
}
static int etnaviv_ioctl_gem_info(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct drm_etnaviv_gem_info *args = data;
struct drm_gem_object *obj;
int ret;
if (args->pad)
return -EINVAL;
obj = drm_gem_object_lookup(file, args->handle);
if (!obj)
return -ENOENT;
ret = etnaviv_gem_mmap_offset(obj, &args->offset);
drm_gem_object_put_unlocked(obj);
return ret;
}
static int etnaviv_ioctl_wait_fence(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct drm_etnaviv_wait_fence *args = data;
struct etnaviv_drm_private *priv = dev->dev_private;
struct timespec *timeout = &TS(args->timeout);
struct etnaviv_gpu *gpu;
if (args->flags & ~(ETNA_WAIT_NONBLOCK))
return -EINVAL;
if (args->pipe >= ETNA_MAX_PIPES)
return -EINVAL;
gpu = priv->gpu[args->pipe];
if (!gpu)
return -ENXIO;
if (args->flags & ETNA_WAIT_NONBLOCK)
timeout = NULL;
return etnaviv_gpu_wait_fence_interruptible(gpu, args->fence,
timeout);
}
static int etnaviv_ioctl_gem_userptr(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct drm_etnaviv_gem_userptr *args = data;
if (args->flags & ~(ETNA_USERPTR_READ|ETNA_USERPTR_WRITE) ||
args->flags == 0)
return -EINVAL;
if (offset_in_page(args->user_ptr | args->user_size) ||
(uintptr_t)args->user_ptr != args->user_ptr ||
(u32)args->user_size != args->user_size ||
args->user_ptr & ~PAGE_MASK)
return -EINVAL;
if (!access_ok((void __user *)(unsigned long)args->user_ptr,
args->user_size))
return -EFAULT;
return etnaviv_gem_new_userptr(dev, file, args->user_ptr,
args->user_size, args->flags,
&args->handle);
}
static int etnaviv_ioctl_gem_wait(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct etnaviv_drm_private *priv = dev->dev_private;
struct drm_etnaviv_gem_wait *args = data;
struct timespec *timeout = &TS(args->timeout);
struct drm_gem_object *obj;
struct etnaviv_gpu *gpu;
int ret;
if (args->flags & ~(ETNA_WAIT_NONBLOCK))
return -EINVAL;
if (args->pipe >= ETNA_MAX_PIPES)
return -EINVAL;
gpu = priv->gpu[args->pipe];
if (!gpu)
return -ENXIO;
obj = drm_gem_object_lookup(file, args->handle);
if (!obj)
return -ENOENT;
if (args->flags & ETNA_WAIT_NONBLOCK)
timeout = NULL;
ret = etnaviv_gem_wait_bo(gpu, obj, timeout);
drm_gem_object_put_unlocked(obj);
return ret;
}
static int etnaviv_ioctl_pm_query_dom(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct etnaviv_drm_private *priv = dev->dev_private;
struct drm_etnaviv_pm_domain *args = data;
struct etnaviv_gpu *gpu;
if (args->pipe >= ETNA_MAX_PIPES)
return -EINVAL;
gpu = priv->gpu[args->pipe];
if (!gpu)
return -ENXIO;
return etnaviv_pm_query_dom(gpu, args);
}
static int etnaviv_ioctl_pm_query_sig(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct etnaviv_drm_private *priv = dev->dev_private;
struct drm_etnaviv_pm_signal *args = data;
struct etnaviv_gpu *gpu;
if (args->pipe >= ETNA_MAX_PIPES)
return -EINVAL;
gpu = priv->gpu[args->pipe];
if (!gpu)
return -ENXIO;
return etnaviv_pm_query_sig(gpu, args);
}
static const struct drm_ioctl_desc etnaviv_ioctls[] = {
#define ETNA_IOCTL(n, func, flags) \
DRM_IOCTL_DEF_DRV(ETNAVIV_##n, etnaviv_ioctl_##func, flags)
ETNA_IOCTL(GET_PARAM, get_param, DRM_RENDER_ALLOW),
ETNA_IOCTL(GEM_NEW, gem_new, DRM_RENDER_ALLOW),
ETNA_IOCTL(GEM_INFO, gem_info, DRM_RENDER_ALLOW),
ETNA_IOCTL(GEM_CPU_PREP, gem_cpu_prep, DRM_RENDER_ALLOW),
ETNA_IOCTL(GEM_CPU_FINI, gem_cpu_fini, DRM_RENDER_ALLOW),
ETNA_IOCTL(GEM_SUBMIT, gem_submit, DRM_RENDER_ALLOW),
ETNA_IOCTL(WAIT_FENCE, wait_fence, DRM_RENDER_ALLOW),
ETNA_IOCTL(GEM_USERPTR, gem_userptr, DRM_RENDER_ALLOW),
ETNA_IOCTL(GEM_WAIT, gem_wait, DRM_RENDER_ALLOW),
ETNA_IOCTL(PM_QUERY_DOM, pm_query_dom, DRM_RENDER_ALLOW),
ETNA_IOCTL(PM_QUERY_SIG, pm_query_sig, DRM_RENDER_ALLOW),
};
static const struct vm_operations_struct vm_ops = {
.fault = etnaviv_gem_fault,
.open = drm_gem_vm_open,
.close = drm_gem_vm_close,
};
static const struct file_operations fops = {
.owner = THIS_MODULE,
.open = drm_open,
.release = drm_release,
.unlocked_ioctl = drm_ioctl,
.compat_ioctl = drm_compat_ioctl,
.poll = drm_poll,
.read = drm_read,
.llseek = no_llseek,
.mmap = etnaviv_gem_mmap,
};
static struct drm_driver etnaviv_drm_driver = {
.driver_features = DRIVER_GEM | DRIVER_RENDER,
.open = etnaviv_open,
.postclose = etnaviv_postclose,
.gem_free_object_unlocked = etnaviv_gem_free_object,
.gem_vm_ops = &vm_ops,
.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
.gem_prime_pin = etnaviv_gem_prime_pin,
.gem_prime_unpin = etnaviv_gem_prime_unpin,
.gem_prime_get_sg_table = etnaviv_gem_prime_get_sg_table,
.gem_prime_import_sg_table = etnaviv_gem_prime_import_sg_table,
.gem_prime_vmap = etnaviv_gem_prime_vmap,
.gem_prime_vunmap = etnaviv_gem_prime_vunmap,
.gem_prime_mmap = etnaviv_gem_prime_mmap,
#ifdef CONFIG_DEBUG_FS
.debugfs_init = etnaviv_debugfs_init,
#endif
.ioctls = etnaviv_ioctls,
.num_ioctls = DRM_ETNAVIV_NUM_IOCTLS,
.fops = &fops,
.name = "etnaviv",
.desc = "etnaviv DRM",
.date = "20151214",
.major = 1,
.minor = 3,
};
/*
* Platform driver:
*/
static int etnaviv_bind(struct device *dev)
{
struct etnaviv_drm_private *priv;
struct drm_device *drm;
int ret;
drm = drm_dev_alloc(&etnaviv_drm_driver, dev);
if (IS_ERR(drm))
return PTR_ERR(drm);
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
if (!priv) {
dev_err(dev, "failed to allocate private data\n");
ret = -ENOMEM;
goto out_put;
}
drm->dev_private = priv;
dev->dma_parms = &priv->dma_parms;
dma_set_max_seg_size(dev, SZ_2G);
mutex_init(&priv->gem_lock);
INIT_LIST_HEAD(&priv->gem_list);
priv->num_gpus = 0;
priv->cmdbuf_suballoc = etnaviv_cmdbuf_suballoc_new(drm->dev);
if (IS_ERR(priv->cmdbuf_suballoc)) {
dev_err(drm->dev, "Failed to create cmdbuf suballocator\n");
ret = PTR_ERR(priv->cmdbuf_suballoc);
goto out_free_priv;
}
dev_set_drvdata(dev, drm);
ret = component_bind_all(dev, drm);
if (ret < 0)
goto out_destroy_suballoc;
load_gpu(drm);
ret = drm_dev_register(drm, 0);
if (ret)
goto out_unbind;
return 0;
out_unbind:
component_unbind_all(dev, drm);
out_destroy_suballoc:
etnaviv_cmdbuf_suballoc_destroy(priv->cmdbuf_suballoc);
out_free_priv:
kfree(priv);
out_put:
drm_dev_put(drm);
return ret;
}
static void etnaviv_unbind(struct device *dev)
{
struct drm_device *drm = dev_get_drvdata(dev);
struct etnaviv_drm_private *priv = drm->dev_private;
drm_dev_unregister(drm);
component_unbind_all(dev, drm);
dev->dma_parms = NULL;
etnaviv_cmdbuf_suballoc_destroy(priv->cmdbuf_suballoc);
drm->dev_private = NULL;
kfree(priv);
drm_dev_put(drm);
}
static const struct component_master_ops etnaviv_master_ops = {
.bind = etnaviv_bind,
.unbind = etnaviv_unbind,
};
static int compare_of(struct device *dev, void *data)
{
struct device_node *np = data;
return dev->of_node == np;
}
static int compare_str(struct device *dev, void *data)
{
return !strcmp(dev_name(dev), data);
}
static int etnaviv_pdev_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct component_match *match = NULL;
if (!dev->platform_data) {
struct device_node *core_node;
for_each_compatible_node(core_node, NULL, "vivante,gc") {
if (!of_device_is_available(core_node))
continue;
drm_of_component_match_add(&pdev->dev, &match,
compare_of, core_node);
}
} else {
char **names = dev->platform_data;
unsigned i;
for (i = 0; names[i]; i++)
component_match_add(dev, &match, compare_str, names[i]);
}
return component_master_add_with_match(dev, &etnaviv_master_ops, match);
}
static int etnaviv_pdev_remove(struct platform_device *pdev)
{
component_master_del(&pdev->dev, &etnaviv_master_ops);
return 0;
}
static struct platform_driver etnaviv_platform_driver = {
.probe = etnaviv_pdev_probe,
.remove = etnaviv_pdev_remove,
.driver = {
.name = "etnaviv",
},
};
static struct platform_device *etnaviv_drm;
static int __init etnaviv_init(void)
{
struct platform_device *pdev;
int ret;
struct device_node *np;
etnaviv_validate_init();
ret = platform_driver_register(&etnaviv_gpu_driver);
if (ret != 0)
return ret;
ret = platform_driver_register(&etnaviv_platform_driver);
if (ret != 0)
goto unregister_gpu_driver;
/*
* If the DT contains at least one available GPU device, instantiate
* the DRM platform device.
*/
for_each_compatible_node(np, NULL, "vivante,gc") {
if (!of_device_is_available(np))
continue;
pdev = platform_device_alloc("etnaviv", -1);
if (!pdev) {
ret = -ENOMEM;
of_node_put(np);
goto unregister_platform_driver;
}
pdev->dev.coherent_dma_mask = DMA_BIT_MASK(40);
pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
/*
* Apply the same DMA configuration to the virtual etnaviv
* device as the GPU we found. This assumes that all Vivante
* GPUs in the system share the same DMA constraints.
*/
of_dma_configure(&pdev->dev, np, true);
ret = platform_device_add(pdev);
if (ret) {
platform_device_put(pdev);
of_node_put(np);
goto unregister_platform_driver;
}
etnaviv_drm = pdev;
of_node_put(np);
break;
}
return 0;
unregister_platform_driver:
platform_driver_unregister(&etnaviv_platform_driver);
unregister_gpu_driver:
platform_driver_unregister(&etnaviv_gpu_driver);
return ret;
}
module_init(etnaviv_init);
static void __exit etnaviv_exit(void)
{
platform_device_unregister(etnaviv_drm);
platform_driver_unregister(&etnaviv_platform_driver);
platform_driver_unregister(&etnaviv_gpu_driver);
}
module_exit(etnaviv_exit);
MODULE_AUTHOR("Christian Gmeiner <christian.gmeiner@gmail.com>");
MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>");
MODULE_AUTHOR("Lucas Stach <l.stach@pengutronix.de>");
MODULE_DESCRIPTION("etnaviv DRM Driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:etnaviv");
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