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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2014-2015 Broadcom
* Copyright (C) 2013 Red Hat
*/
/**
* DOC: Broadcom VC4 Graphics Driver
*
* The Broadcom VideoCore 4 (present in the Raspberry Pi) contains a
* OpenGL ES 2.0-compatible 3D engine called V3D, and a highly
* configurable display output pipeline that supports HDMI, DSI, DPI,
* and Composite TV output.
*
* The 3D engine also has an interface for submitting arbitrary
* compute shader-style jobs using the same shader processor as is
* used for vertex and fragment shaders in GLES 2.0. However, given
* that the hardware isn't able to expose any standard interfaces like
* OpenGL compute shaders or OpenCL, it isn't supported by this
* driver.
*/
#include <linux/clk.h>
#include <linux/component.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_drv.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_vblank.h>
#include "uapi/drm/vc4_drm.h"
#include "vc4_drv.h"
#include "vc4_regs.h"
#define DRIVER_NAME "vc4"
#define DRIVER_DESC "Broadcom VC4 graphics"
#define DRIVER_DATE "20140616"
#define DRIVER_MAJOR 0
#define DRIVER_MINOR 0
#define DRIVER_PATCHLEVEL 0
/* Helper function for mapping the regs on a platform device. */
void __iomem *vc4_ioremap_regs(struct platform_device *dev, int index)
{
struct resource *res;
void __iomem *map;
res = platform_get_resource(dev, IORESOURCE_MEM, index);
map = devm_ioremap_resource(&dev->dev, res);
if (IS_ERR(map)) {
DRM_ERROR("Failed to map registers: %ld\n", PTR_ERR(map));
return map;
}
return map;
}
static int vc4_get_param_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct vc4_dev *vc4 = to_vc4_dev(dev);
struct drm_vc4_get_param *args = data;
int ret;
if (args->pad != 0)
return -EINVAL;
if (!vc4->v3d)
return -ENODEV;
switch (args->param) {
case DRM_VC4_PARAM_V3D_IDENT0:
ret = vc4_v3d_pm_get(vc4);
if (ret)
return ret;
args->value = V3D_READ(V3D_IDENT0);
vc4_v3d_pm_put(vc4);
break;
case DRM_VC4_PARAM_V3D_IDENT1:
ret = vc4_v3d_pm_get(vc4);
if (ret)
return ret;
args->value = V3D_READ(V3D_IDENT1);
vc4_v3d_pm_put(vc4);
break;
case DRM_VC4_PARAM_V3D_IDENT2:
ret = vc4_v3d_pm_get(vc4);
if (ret)
return ret;
args->value = V3D_READ(V3D_IDENT2);
vc4_v3d_pm_put(vc4);
break;
case DRM_VC4_PARAM_SUPPORTS_BRANCHES:
case DRM_VC4_PARAM_SUPPORTS_ETC1:
case DRM_VC4_PARAM_SUPPORTS_THREADED_FS:
case DRM_VC4_PARAM_SUPPORTS_FIXED_RCL_ORDER:
case DRM_VC4_PARAM_SUPPORTS_MADVISE:
case DRM_VC4_PARAM_SUPPORTS_PERFMON:
args->value = true;
break;
default:
DRM_DEBUG("Unknown parameter %d\n", args->param);
return -EINVAL;
}
return 0;
}
static int vc4_open(struct drm_device *dev, struct drm_file *file)
{
struct vc4_file *vc4file;
vc4file = kzalloc(sizeof(*vc4file), GFP_KERNEL);
if (!vc4file)
return -ENOMEM;
vc4_perfmon_open_file(vc4file);
file->driver_priv = vc4file;
return 0;
}
static void vc4_close(struct drm_device *dev, struct drm_file *file)
{
struct vc4_dev *vc4 = to_vc4_dev(dev);
struct vc4_file *vc4file = file->driver_priv;
if (vc4file->bin_bo_used)
vc4_v3d_bin_bo_put(vc4);
vc4_perfmon_close_file(vc4file);
kfree(vc4file);
}
static const struct vm_operations_struct vc4_vm_ops = {
.fault = vc4_fault,
.open = drm_gem_vm_open,
.close = drm_gem_vm_close,
};
static const struct file_operations vc4_drm_fops = {
.owner = THIS_MODULE,
.open = drm_open,
.release = drm_release,
.unlocked_ioctl = drm_ioctl,
.mmap = vc4_mmap,
.poll = drm_poll,
.read = drm_read,
.compat_ioctl = drm_compat_ioctl,
.llseek = noop_llseek,
};
static const struct drm_ioctl_desc vc4_drm_ioctls[] = {
DRM_IOCTL_DEF_DRV(VC4_SUBMIT_CL, vc4_submit_cl_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(VC4_WAIT_SEQNO, vc4_wait_seqno_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(VC4_WAIT_BO, vc4_wait_bo_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(VC4_CREATE_BO, vc4_create_bo_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(VC4_MMAP_BO, vc4_mmap_bo_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(VC4_GET_HANG_STATE, vc4_get_hang_state_ioctl,
DRM_ROOT_ONLY),
DRM_IOCTL_DEF_DRV(VC4_GET_PARAM, vc4_get_param_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(VC4_SET_TILING, vc4_set_tiling_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(VC4_GET_TILING, vc4_get_tiling_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(VC4_LABEL_BO, vc4_label_bo_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(VC4_GEM_MADVISE, vc4_gem_madvise_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(VC4_PERFMON_CREATE, vc4_perfmon_create_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(VC4_PERFMON_DESTROY, vc4_perfmon_destroy_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(VC4_PERFMON_GET_VALUES, vc4_perfmon_get_values_ioctl, DRM_RENDER_ALLOW),
};
static struct drm_driver vc4_drm_driver = {
.driver_features = (DRIVER_MODESET |
DRIVER_ATOMIC |
DRIVER_GEM |
DRIVER_RENDER |
DRIVER_SYNCOBJ),
.open = vc4_open,
.postclose = vc4_close,
.irq_handler = vc4_irq,
.irq_preinstall = vc4_irq_preinstall,
.irq_postinstall = vc4_irq_postinstall,
.irq_uninstall = vc4_irq_uninstall,
#if defined(CONFIG_DEBUG_FS)
.debugfs_init = vc4_debugfs_init,
#endif
.gem_create_object = vc4_create_object,
.gem_free_object_unlocked = vc4_free_object,
.gem_vm_ops = &vc4_vm_ops,
.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
.gem_prime_export = vc4_prime_export,
.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
.gem_prime_import_sg_table = vc4_prime_import_sg_table,
.gem_prime_vmap = vc4_prime_vmap,
.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
.gem_prime_mmap = vc4_prime_mmap,
.dumb_create = vc4_dumb_create,
.ioctls = vc4_drm_ioctls,
.num_ioctls = ARRAY_SIZE(vc4_drm_ioctls),
.fops = &vc4_drm_fops,
.name = DRIVER_NAME,
.desc = DRIVER_DESC,
.date = DRIVER_DATE,
.major = DRIVER_MAJOR,
.minor = DRIVER_MINOR,
.patchlevel = DRIVER_PATCHLEVEL,
};
static int compare_dev(struct device *dev, void *data)
{
return dev == data;
}
static void vc4_match_add_drivers(struct device *dev,
struct component_match **match,
struct platform_driver *const *drivers,
int count)
{
int i;
for (i = 0; i < count; i++) {
struct device_driver *drv = &drivers[i]->driver;
struct device *p = NULL, *d;
while ((d = platform_find_device_by_driver(p, drv))) {
put_device(p);
component_match_add(dev, match, compare_dev, d);
p = d;
}
put_device(p);
}
}
const struct of_device_id vc4_dma_range_matches[] = {
{ .compatible = "brcm,bcm2711-hvs" },
{ .compatible = "brcm,bcm2835-hvs" },
{ .compatible = "brcm,bcm2835-v3d" },
{ .compatible = "brcm,cygnus-v3d" },
{ .compatible = "brcm,vc4-v3d" },
{}
};
static int vc4_drm_bind(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct drm_device *drm;
struct vc4_dev *vc4;
struct device_node *node;
struct drm_crtc *crtc;
int ret = 0;
dev->coherent_dma_mask = DMA_BIT_MASK(32);
/* If VC4 V3D is missing, don't advertise render nodes. */
node = of_find_matching_node_and_match(NULL, vc4_v3d_dt_match, NULL);
if (!node || !of_device_is_available(node))
vc4_drm_driver.driver_features &= ~DRIVER_RENDER;
of_node_put(node);
node = of_find_matching_node_and_match(NULL, vc4_dma_range_matches,
NULL);
if (node) {
ret = of_dma_configure(dev, node, true);
of_node_put(node);
if (ret)
return ret;
}
vc4 = devm_drm_dev_alloc(dev, &vc4_drm_driver, struct vc4_dev, base);
if (IS_ERR(vc4))
return PTR_ERR(vc4);
drm = &vc4->base;
platform_set_drvdata(pdev, drm);
INIT_LIST_HEAD(&vc4->debugfs_list);
mutex_init(&vc4->bin_bo_lock);
ret = vc4_bo_cache_init(drm);
if (ret)
return ret;
ret = drmm_mode_config_init(drm);
if (ret)
return ret;
ret = vc4_gem_init(drm);
if (ret)
return ret;
ret = component_bind_all(dev, drm);
if (ret)
return ret;
ret = vc4_plane_create_additional_planes(drm);
if (ret)
goto unbind_all;
drm_fb_helper_remove_conflicting_framebuffers(NULL, "vc4drmfb", false);
ret = vc4_kms_load(drm);
if (ret < 0)
goto unbind_all;
drm_for_each_crtc(crtc, drm)
vc4_crtc_disable_at_boot(crtc);
ret = drm_dev_register(drm, 0);
if (ret < 0)
goto unbind_all;
drm_fbdev_generic_setup(drm, 16);
return 0;
unbind_all:
component_unbind_all(dev, drm);
return ret;
}
static void vc4_drm_unbind(struct device *dev)
{
struct drm_device *drm = dev_get_drvdata(dev);
drm_dev_unregister(drm);
drm_atomic_helper_shutdown(drm);
}
static const struct component_master_ops vc4_drm_ops = {
.bind = vc4_drm_bind,
.unbind = vc4_drm_unbind,
};
static struct platform_driver *const component_drivers[] = {
&vc4_hdmi_driver,
&vc4_vec_driver,
&vc4_dpi_driver,
&vc4_dsi_driver,
&vc4_hvs_driver,
&vc4_txp_driver,
&vc4_crtc_driver,
&vc4_v3d_driver,
};
static int vc4_platform_drm_probe(struct platform_device *pdev)
{
struct component_match *match = NULL;
struct device *dev = &pdev->dev;
vc4_match_add_drivers(dev, &match,
component_drivers, ARRAY_SIZE(component_drivers));
return component_master_add_with_match(dev, &vc4_drm_ops, match);
}
static int vc4_platform_drm_remove(struct platform_device *pdev)
{
component_master_del(&pdev->dev, &vc4_drm_ops);
return 0;
}
static const struct of_device_id vc4_of_match[] = {
{ .compatible = "brcm,bcm2711-vc5", },
{ .compatible = "brcm,bcm2835-vc4", },
{ .compatible = "brcm,cygnus-vc4", },
{},
};
MODULE_DEVICE_TABLE(of, vc4_of_match);
static struct platform_driver vc4_platform_driver = {
.probe = vc4_platform_drm_probe,
.remove = vc4_platform_drm_remove,
.driver = {
.name = "vc4-drm",
.of_match_table = vc4_of_match,
},
};
static int __init vc4_drm_register(void)
{
int ret;
ret = platform_register_drivers(component_drivers,
ARRAY_SIZE(component_drivers));
if (ret)
return ret;
return platform_driver_register(&vc4_platform_driver);
}
static void __exit vc4_drm_unregister(void)
{
platform_unregister_drivers(component_drivers,
ARRAY_SIZE(component_drivers));
platform_driver_unregister(&vc4_platform_driver);
}
module_init(vc4_drm_register);
module_exit(vc4_drm_unregister);
MODULE_ALIAS("platform:vc4-drm");
MODULE_DESCRIPTION("Broadcom VC4 DRM Driver");
MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
MODULE_LICENSE("GPL v2");
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