linux_dsm_epyc7002/drivers/gpu/drm/vc4/vc4_drv.c
Eric Anholt ffc2674071 drm/vc4: Disable V3D interactions if the v3d component didn't probe.
One might want to use the VC4 display stack without using Mesa.
Similar to the debugfs fixes for not having all of the possible
display bits enabled, make sure you can't oops in vc4 if v3d isn't
enabled.

v2: Fix matching against other v3d variants (review by Paul), don't
    forget to set irq_enabled so that the vblank uapi works
v3: Use -ENODEV instead of -EINVAL on Paul's suggestion.

Signed-off-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20190401183559.3823-2-eric@anholt.net
Reviewed-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
2019-04-03 12:49:18 -07:00

406 lines
10 KiB
C

/*
* Copyright (C) 2014-2015 Broadcom
* Copyright (C) 2013 Red Hat
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/**
* 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/io.h>
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_atomic_helper.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_file *vc4file = file->driver_priv;
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_PRIME |
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,
.get_scanout_position = vc4_crtc_get_scanoutpos,
.get_vblank_timestamp = drm_calc_vbltimestamp_from_scanoutpos,
#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_import = drm_gem_prime_import,
.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 = bus_find_device(&platform_bus_type, p, drv,
(void *)platform_bus_type.match))) {
put_device(p);
component_match_add(dev, match, compare_dev, d);
p = d;
}
put_device(p);
}
}
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;
int ret = 0;
dev->coherent_dma_mask = DMA_BIT_MASK(32);
vc4 = devm_kzalloc(dev, sizeof(*vc4), GFP_KERNEL);
if (!vc4)
return -ENOMEM;
/* 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);
drm = drm_dev_alloc(&vc4_drm_driver, dev);
if (IS_ERR(drm))
return PTR_ERR(drm);
platform_set_drvdata(pdev, drm);
vc4->dev = drm;
drm->dev_private = vc4;
INIT_LIST_HEAD(&vc4->debugfs_list);
ret = vc4_bo_cache_init(drm);
if (ret)
goto dev_put;
drm_mode_config_init(drm);
vc4_gem_init(drm);
ret = component_bind_all(dev, drm);
if (ret)
goto gem_destroy;
drm_fb_helper_remove_conflicting_framebuffers(NULL, "vc4drmfb", false);
ret = vc4_kms_load(drm);
if (ret < 0)
goto unbind_all;
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);
gem_destroy:
vc4_gem_destroy(drm);
vc4_bo_cache_destroy(drm);
dev_put:
drm_dev_put(drm);
return ret;
}
static void vc4_drm_unbind(struct device *dev)
{
struct drm_device *drm = dev_get_drvdata(dev);
struct vc4_dev *vc4 = to_vc4_dev(drm);
drm_dev_unregister(drm);
drm_atomic_helper_shutdown(drm);
drm_mode_config_cleanup(drm);
drm_atomic_private_obj_fini(&vc4->load_tracker);
drm_atomic_private_obj_fini(&vc4->ctm_manager);
drm_dev_put(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_txp_driver,
&vc4_hvs_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,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");