406 lines
10 KiB
C
406 lines
10 KiB
C
/*
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* Copyright (C) 2014-2015 Broadcom
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* Copyright (C) 2013 Red Hat
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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/**
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* DOC: Broadcom VC4 Graphics Driver
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*
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* The Broadcom VideoCore 4 (present in the Raspberry Pi) contains a
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* OpenGL ES 2.0-compatible 3D engine called V3D, and a highly
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* configurable display output pipeline that supports HDMI, DSI, DPI,
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* and Composite TV output.
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*
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* The 3D engine also has an interface for submitting arbitrary
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* compute shader-style jobs using the same shader processor as is
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* used for vertex and fragment shaders in GLES 2.0. However, given
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* that the hardware isn't able to expose any standard interfaces like
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* OpenGL compute shaders or OpenCL, it isn't supported by this
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* driver.
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*/
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#include <linux/clk.h>
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#include <linux/component.h>
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#include <linux/device.h>
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#include <linux/io.h>
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#include <linux/module.h>
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#include <linux/of_platform.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include <drm/drm_fb_cma_helper.h>
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#include <drm/drm_fb_helper.h>
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#include <drm/drm_atomic_helper.h>
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#include "uapi/drm/vc4_drm.h"
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#include "vc4_drv.h"
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#include "vc4_regs.h"
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#define DRIVER_NAME "vc4"
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#define DRIVER_DESC "Broadcom VC4 graphics"
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#define DRIVER_DATE "20140616"
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#define DRIVER_MAJOR 0
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#define DRIVER_MINOR 0
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#define DRIVER_PATCHLEVEL 0
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/* Helper function for mapping the regs on a platform device. */
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void __iomem *vc4_ioremap_regs(struct platform_device *dev, int index)
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{
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struct resource *res;
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void __iomem *map;
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res = platform_get_resource(dev, IORESOURCE_MEM, index);
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map = devm_ioremap_resource(&dev->dev, res);
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if (IS_ERR(map)) {
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DRM_ERROR("Failed to map registers: %ld\n", PTR_ERR(map));
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return map;
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}
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return map;
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}
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static int vc4_get_param_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_priv)
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{
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struct vc4_dev *vc4 = to_vc4_dev(dev);
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struct drm_vc4_get_param *args = data;
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int ret;
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if (args->pad != 0)
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return -EINVAL;
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if (!vc4->v3d)
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return -ENODEV;
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switch (args->param) {
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case DRM_VC4_PARAM_V3D_IDENT0:
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ret = vc4_v3d_pm_get(vc4);
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if (ret)
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return ret;
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args->value = V3D_READ(V3D_IDENT0);
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vc4_v3d_pm_put(vc4);
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break;
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case DRM_VC4_PARAM_V3D_IDENT1:
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ret = vc4_v3d_pm_get(vc4);
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if (ret)
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return ret;
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args->value = V3D_READ(V3D_IDENT1);
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vc4_v3d_pm_put(vc4);
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break;
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case DRM_VC4_PARAM_V3D_IDENT2:
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ret = vc4_v3d_pm_get(vc4);
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if (ret)
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return ret;
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args->value = V3D_READ(V3D_IDENT2);
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vc4_v3d_pm_put(vc4);
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break;
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case DRM_VC4_PARAM_SUPPORTS_BRANCHES:
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case DRM_VC4_PARAM_SUPPORTS_ETC1:
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case DRM_VC4_PARAM_SUPPORTS_THREADED_FS:
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case DRM_VC4_PARAM_SUPPORTS_FIXED_RCL_ORDER:
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case DRM_VC4_PARAM_SUPPORTS_MADVISE:
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case DRM_VC4_PARAM_SUPPORTS_PERFMON:
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args->value = true;
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break;
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default:
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DRM_DEBUG("Unknown parameter %d\n", args->param);
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return -EINVAL;
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}
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return 0;
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}
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static int vc4_open(struct drm_device *dev, struct drm_file *file)
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{
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struct vc4_file *vc4file;
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vc4file = kzalloc(sizeof(*vc4file), GFP_KERNEL);
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if (!vc4file)
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return -ENOMEM;
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vc4_perfmon_open_file(vc4file);
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file->driver_priv = vc4file;
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return 0;
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}
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static void vc4_close(struct drm_device *dev, struct drm_file *file)
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{
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struct vc4_file *vc4file = file->driver_priv;
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vc4_perfmon_close_file(vc4file);
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kfree(vc4file);
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}
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static const struct vm_operations_struct vc4_vm_ops = {
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.fault = vc4_fault,
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.open = drm_gem_vm_open,
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.close = drm_gem_vm_close,
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};
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static const struct file_operations vc4_drm_fops = {
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.owner = THIS_MODULE,
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.open = drm_open,
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.release = drm_release,
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.unlocked_ioctl = drm_ioctl,
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.mmap = vc4_mmap,
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.poll = drm_poll,
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.read = drm_read,
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.compat_ioctl = drm_compat_ioctl,
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.llseek = noop_llseek,
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};
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static const struct drm_ioctl_desc vc4_drm_ioctls[] = {
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DRM_IOCTL_DEF_DRV(VC4_SUBMIT_CL, vc4_submit_cl_ioctl, DRM_RENDER_ALLOW),
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DRM_IOCTL_DEF_DRV(VC4_WAIT_SEQNO, vc4_wait_seqno_ioctl, DRM_RENDER_ALLOW),
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DRM_IOCTL_DEF_DRV(VC4_WAIT_BO, vc4_wait_bo_ioctl, DRM_RENDER_ALLOW),
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DRM_IOCTL_DEF_DRV(VC4_CREATE_BO, vc4_create_bo_ioctl, DRM_RENDER_ALLOW),
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DRM_IOCTL_DEF_DRV(VC4_MMAP_BO, vc4_mmap_bo_ioctl, DRM_RENDER_ALLOW),
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DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, DRM_RENDER_ALLOW),
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DRM_IOCTL_DEF_DRV(VC4_GET_HANG_STATE, vc4_get_hang_state_ioctl,
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DRM_ROOT_ONLY),
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DRM_IOCTL_DEF_DRV(VC4_GET_PARAM, vc4_get_param_ioctl, DRM_RENDER_ALLOW),
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DRM_IOCTL_DEF_DRV(VC4_SET_TILING, vc4_set_tiling_ioctl, DRM_RENDER_ALLOW),
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DRM_IOCTL_DEF_DRV(VC4_GET_TILING, vc4_get_tiling_ioctl, DRM_RENDER_ALLOW),
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DRM_IOCTL_DEF_DRV(VC4_LABEL_BO, vc4_label_bo_ioctl, DRM_RENDER_ALLOW),
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DRM_IOCTL_DEF_DRV(VC4_GEM_MADVISE, vc4_gem_madvise_ioctl, DRM_RENDER_ALLOW),
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DRM_IOCTL_DEF_DRV(VC4_PERFMON_CREATE, vc4_perfmon_create_ioctl, DRM_RENDER_ALLOW),
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DRM_IOCTL_DEF_DRV(VC4_PERFMON_DESTROY, vc4_perfmon_destroy_ioctl, DRM_RENDER_ALLOW),
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DRM_IOCTL_DEF_DRV(VC4_PERFMON_GET_VALUES, vc4_perfmon_get_values_ioctl, DRM_RENDER_ALLOW),
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};
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static struct drm_driver vc4_drm_driver = {
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.driver_features = (DRIVER_MODESET |
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DRIVER_ATOMIC |
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DRIVER_GEM |
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DRIVER_RENDER |
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DRIVER_PRIME |
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DRIVER_SYNCOBJ),
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.open = vc4_open,
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.postclose = vc4_close,
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.irq_handler = vc4_irq,
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.irq_preinstall = vc4_irq_preinstall,
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.irq_postinstall = vc4_irq_postinstall,
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.irq_uninstall = vc4_irq_uninstall,
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.get_scanout_position = vc4_crtc_get_scanoutpos,
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.get_vblank_timestamp = drm_calc_vbltimestamp_from_scanoutpos,
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#if defined(CONFIG_DEBUG_FS)
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.debugfs_init = vc4_debugfs_init,
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#endif
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.gem_create_object = vc4_create_object,
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.gem_free_object_unlocked = vc4_free_object,
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.gem_vm_ops = &vc4_vm_ops,
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.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
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.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
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.gem_prime_import = drm_gem_prime_import,
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.gem_prime_export = vc4_prime_export,
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.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
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.gem_prime_import_sg_table = vc4_prime_import_sg_table,
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.gem_prime_vmap = vc4_prime_vmap,
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.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
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.gem_prime_mmap = vc4_prime_mmap,
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.dumb_create = vc4_dumb_create,
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.ioctls = vc4_drm_ioctls,
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.num_ioctls = ARRAY_SIZE(vc4_drm_ioctls),
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.fops = &vc4_drm_fops,
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.name = DRIVER_NAME,
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.desc = DRIVER_DESC,
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.date = DRIVER_DATE,
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.major = DRIVER_MAJOR,
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.minor = DRIVER_MINOR,
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.patchlevel = DRIVER_PATCHLEVEL,
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};
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static int compare_dev(struct device *dev, void *data)
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{
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return dev == data;
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}
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static void vc4_match_add_drivers(struct device *dev,
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struct component_match **match,
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struct platform_driver *const *drivers,
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int count)
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{
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int i;
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for (i = 0; i < count; i++) {
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struct device_driver *drv = &drivers[i]->driver;
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struct device *p = NULL, *d;
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while ((d = bus_find_device(&platform_bus_type, p, drv,
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(void *)platform_bus_type.match))) {
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put_device(p);
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component_match_add(dev, match, compare_dev, d);
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p = d;
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}
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put_device(p);
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}
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}
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static int vc4_drm_bind(struct device *dev)
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct drm_device *drm;
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struct vc4_dev *vc4;
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struct device_node *node;
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int ret = 0;
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dev->coherent_dma_mask = DMA_BIT_MASK(32);
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vc4 = devm_kzalloc(dev, sizeof(*vc4), GFP_KERNEL);
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if (!vc4)
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return -ENOMEM;
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/* If VC4 V3D is missing, don't advertise render nodes. */
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node = of_find_matching_node_and_match(NULL, vc4_v3d_dt_match, NULL);
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if (!node || !of_device_is_available(node))
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vc4_drm_driver.driver_features &= ~DRIVER_RENDER;
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of_node_put(node);
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drm = drm_dev_alloc(&vc4_drm_driver, dev);
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if (IS_ERR(drm))
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return PTR_ERR(drm);
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platform_set_drvdata(pdev, drm);
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vc4->dev = drm;
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drm->dev_private = vc4;
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INIT_LIST_HEAD(&vc4->debugfs_list);
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ret = vc4_bo_cache_init(drm);
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if (ret)
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goto dev_put;
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drm_mode_config_init(drm);
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vc4_gem_init(drm);
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ret = component_bind_all(dev, drm);
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if (ret)
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goto gem_destroy;
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drm_fb_helper_remove_conflicting_framebuffers(NULL, "vc4drmfb", false);
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ret = vc4_kms_load(drm);
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if (ret < 0)
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goto unbind_all;
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ret = drm_dev_register(drm, 0);
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if (ret < 0)
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goto unbind_all;
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drm_fbdev_generic_setup(drm, 16);
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return 0;
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unbind_all:
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component_unbind_all(dev, drm);
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gem_destroy:
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vc4_gem_destroy(drm);
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vc4_bo_cache_destroy(drm);
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dev_put:
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drm_dev_put(drm);
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return ret;
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}
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static void vc4_drm_unbind(struct device *dev)
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{
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struct drm_device *drm = dev_get_drvdata(dev);
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struct vc4_dev *vc4 = to_vc4_dev(drm);
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drm_dev_unregister(drm);
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drm_atomic_helper_shutdown(drm);
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drm_mode_config_cleanup(drm);
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drm_atomic_private_obj_fini(&vc4->load_tracker);
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drm_atomic_private_obj_fini(&vc4->ctm_manager);
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drm_dev_put(drm);
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}
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static const struct component_master_ops vc4_drm_ops = {
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.bind = vc4_drm_bind,
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.unbind = vc4_drm_unbind,
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};
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static struct platform_driver *const component_drivers[] = {
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&vc4_hdmi_driver,
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&vc4_vec_driver,
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&vc4_dpi_driver,
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&vc4_dsi_driver,
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&vc4_txp_driver,
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&vc4_hvs_driver,
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&vc4_crtc_driver,
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&vc4_v3d_driver,
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};
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static int vc4_platform_drm_probe(struct platform_device *pdev)
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{
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struct component_match *match = NULL;
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struct device *dev = &pdev->dev;
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vc4_match_add_drivers(dev, &match,
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component_drivers, ARRAY_SIZE(component_drivers));
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return component_master_add_with_match(dev, &vc4_drm_ops, match);
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}
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static int vc4_platform_drm_remove(struct platform_device *pdev)
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{
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component_master_del(&pdev->dev, &vc4_drm_ops);
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return 0;
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}
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static const struct of_device_id vc4_of_match[] = {
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{ .compatible = "brcm,bcm2835-vc4", },
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{ .compatible = "brcm,cygnus-vc4", },
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{},
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};
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MODULE_DEVICE_TABLE(of, vc4_of_match);
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static struct platform_driver vc4_platform_driver = {
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.probe = vc4_platform_drm_probe,
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.remove = vc4_platform_drm_remove,
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.driver = {
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.name = "vc4-drm",
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.of_match_table = vc4_of_match,
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},
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};
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static int __init vc4_drm_register(void)
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{
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int ret;
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ret = platform_register_drivers(component_drivers,
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ARRAY_SIZE(component_drivers));
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if (ret)
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return ret;
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return platform_driver_register(&vc4_platform_driver);
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}
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static void __exit vc4_drm_unregister(void)
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{
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platform_unregister_drivers(component_drivers,
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ARRAY_SIZE(component_drivers));
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platform_driver_unregister(&vc4_platform_driver);
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}
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module_init(vc4_drm_register);
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module_exit(vc4_drm_unregister);
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MODULE_ALIAS("platform:vc4-drm");
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MODULE_DESCRIPTION("Broadcom VC4 DRM Driver");
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MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
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MODULE_LICENSE("GPL v2");
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