2018-05-01 01:10:58 +07:00
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// SPDX-License-Identifier: GPL-2.0+
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/* Copyright (C) 2014-2018 Broadcom */
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/**
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* DOC: Broadcom V3D Graphics Driver
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*
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* This driver supports the Broadcom V3D 3.3 and 4.1 OpenGL ES GPUs.
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* For V3D 2.x support, see the VC4 driver.
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*
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* Currently only single-core rendering using the binner and renderer
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* is supported. The TFU (texture formatting unit) and V3D 4.x's CSD
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* (compute shader dispatch) are not yet supported.
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*/
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#include <linux/clk.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 "uapi/drm/v3d_drm.h"
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#include "v3d_drv.h"
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#include "v3d_regs.h"
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#define DRIVER_NAME "v3d"
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#define DRIVER_DESC "Broadcom V3D graphics"
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#define DRIVER_DATE "20180419"
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#define DRIVER_MAJOR 1
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#define DRIVER_MINOR 0
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#define DRIVER_PATCHLEVEL 0
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#ifdef CONFIG_PM
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static int v3d_runtime_suspend(struct device *dev)
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{
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struct drm_device *drm = dev_get_drvdata(dev);
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struct v3d_dev *v3d = to_v3d_dev(drm);
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v3d_irq_disable(v3d);
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clk_disable_unprepare(v3d->clk);
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return 0;
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}
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static int v3d_runtime_resume(struct device *dev)
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{
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struct drm_device *drm = dev_get_drvdata(dev);
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struct v3d_dev *v3d = to_v3d_dev(drm);
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int ret;
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ret = clk_prepare_enable(v3d->clk);
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if (ret != 0)
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return ret;
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/* XXX: VPM base */
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v3d_mmu_set_page_table(v3d);
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v3d_irq_enable(v3d);
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return 0;
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}
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#endif
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static const struct dev_pm_ops v3d_v3d_pm_ops = {
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SET_RUNTIME_PM_OPS(v3d_runtime_suspend, v3d_runtime_resume, NULL)
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};
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static int v3d_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 v3d_dev *v3d = to_v3d_dev(dev);
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struct drm_v3d_get_param *args = data;
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int ret;
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static const u32 reg_map[] = {
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[DRM_V3D_PARAM_V3D_UIFCFG] = V3D_HUB_UIFCFG,
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[DRM_V3D_PARAM_V3D_HUB_IDENT1] = V3D_HUB_IDENT1,
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[DRM_V3D_PARAM_V3D_HUB_IDENT2] = V3D_HUB_IDENT2,
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[DRM_V3D_PARAM_V3D_HUB_IDENT3] = V3D_HUB_IDENT3,
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[DRM_V3D_PARAM_V3D_CORE0_IDENT0] = V3D_CTL_IDENT0,
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[DRM_V3D_PARAM_V3D_CORE0_IDENT1] = V3D_CTL_IDENT1,
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[DRM_V3D_PARAM_V3D_CORE0_IDENT2] = V3D_CTL_IDENT2,
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};
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if (args->pad != 0)
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return -EINVAL;
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/* Note that DRM_V3D_PARAM_V3D_CORE0_IDENT0 is 0, so we need
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* to explicitly allow it in the "the register in our
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* parameter map" check.
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*/
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if (args->param < ARRAY_SIZE(reg_map) &&
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(reg_map[args->param] ||
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args->param == DRM_V3D_PARAM_V3D_CORE0_IDENT0)) {
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u32 offset = reg_map[args->param];
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if (args->value != 0)
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return -EINVAL;
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ret = pm_runtime_get_sync(v3d->dev);
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if (args->param >= DRM_V3D_PARAM_V3D_CORE0_IDENT0 &&
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args->param <= DRM_V3D_PARAM_V3D_CORE0_IDENT2) {
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args->value = V3D_CORE_READ(0, offset);
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} else {
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args->value = V3D_READ(offset);
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}
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pm_runtime_mark_last_busy(v3d->dev);
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pm_runtime_put_autosuspend(v3d->dev);
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return 0;
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}
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/* Any params that aren't just register reads would go here. */
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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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static int
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v3d_open(struct drm_device *dev, struct drm_file *file)
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{
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struct v3d_dev *v3d = to_v3d_dev(dev);
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struct v3d_file_priv *v3d_priv;
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int i;
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v3d_priv = kzalloc(sizeof(*v3d_priv), GFP_KERNEL);
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if (!v3d_priv)
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return -ENOMEM;
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v3d_priv->v3d = v3d;
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for (i = 0; i < V3D_MAX_QUEUES; i++) {
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drm_sched_entity_init(&v3d->queue[i].sched,
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&v3d_priv->sched_entity[i],
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&v3d->queue[i].sched.sched_rq[DRM_SCHED_PRIORITY_NORMAL],
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2018-05-16 05:21:51 +07:00
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NULL);
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2018-05-01 01:10:58 +07:00
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}
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file->driver_priv = v3d_priv;
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return 0;
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}
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static void
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v3d_postclose(struct drm_device *dev, struct drm_file *file)
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{
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struct v3d_dev *v3d = to_v3d_dev(dev);
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struct v3d_file_priv *v3d_priv = file->driver_priv;
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enum v3d_queue q;
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for (q = 0; q < V3D_MAX_QUEUES; q++) {
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drm_sched_entity_fini(&v3d->queue[q].sched,
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&v3d_priv->sched_entity[q]);
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}
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kfree(v3d_priv);
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}
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static const struct file_operations v3d_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 = v3d_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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/* DRM_AUTH is required on SUBMIT_CL for now, while we don't have GMP
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* protection between clients. Note that render nodes would be be
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* able to submit CLs that could access BOs from clients authenticated
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* with the master node.
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*/
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static const struct drm_ioctl_desc v3d_drm_ioctls[] = {
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DRM_IOCTL_DEF_DRV(V3D_SUBMIT_CL, v3d_submit_cl_ioctl, DRM_RENDER_ALLOW | DRM_AUTH),
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DRM_IOCTL_DEF_DRV(V3D_WAIT_BO, v3d_wait_bo_ioctl, DRM_RENDER_ALLOW),
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DRM_IOCTL_DEF_DRV(V3D_CREATE_BO, v3d_create_bo_ioctl, DRM_RENDER_ALLOW),
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DRM_IOCTL_DEF_DRV(V3D_MMAP_BO, v3d_mmap_bo_ioctl, DRM_RENDER_ALLOW),
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DRM_IOCTL_DEF_DRV(V3D_GET_PARAM, v3d_get_param_ioctl, DRM_RENDER_ALLOW),
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DRM_IOCTL_DEF_DRV(V3D_GET_BO_OFFSET, v3d_get_bo_offset_ioctl, DRM_RENDER_ALLOW),
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};
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static const struct vm_operations_struct v3d_vm_ops = {
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.fault = v3d_gem_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 struct drm_driver v3d_drm_driver = {
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.driver_features = (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 = v3d_open,
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.postclose = v3d_postclose,
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#if defined(CONFIG_DEBUG_FS)
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.debugfs_init = v3d_debugfs_init,
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#endif
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.gem_free_object_unlocked = v3d_free_object,
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.gem_vm_ops = &v3d_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 = drm_gem_prime_export,
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.gem_prime_res_obj = v3d_prime_res_obj,
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.gem_prime_get_sg_table = v3d_prime_get_sg_table,
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.gem_prime_import_sg_table = v3d_prime_import_sg_table,
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.gem_prime_mmap = v3d_prime_mmap,
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.ioctls = v3d_drm_ioctls,
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.num_ioctls = ARRAY_SIZE(v3d_drm_ioctls),
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.fops = &v3d_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 const struct of_device_id v3d_of_match[] = {
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{ .compatible = "brcm,7268-v3d" },
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{ .compatible = "brcm,7278-v3d" },
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{},
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};
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MODULE_DEVICE_TABLE(of, v3d_of_match);
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static int
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map_regs(struct v3d_dev *v3d, void __iomem **regs, const char *name)
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{
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struct resource *res =
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platform_get_resource_byname(v3d->pdev, IORESOURCE_MEM, name);
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*regs = devm_ioremap_resource(v3d->dev, res);
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return PTR_ERR_OR_ZERO(*regs);
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}
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static int v3d_platform_drm_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct drm_device *drm;
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struct v3d_dev *v3d;
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int ret;
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u32 ident1;
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dev->coherent_dma_mask = DMA_BIT_MASK(36);
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v3d = kzalloc(sizeof(*v3d), GFP_KERNEL);
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if (!v3d)
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return -ENOMEM;
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v3d->dev = dev;
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v3d->pdev = pdev;
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drm = &v3d->drm;
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ret = map_regs(v3d, &v3d->bridge_regs, "bridge");
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if (ret)
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goto dev_free;
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ret = map_regs(v3d, &v3d->hub_regs, "hub");
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if (ret)
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goto dev_free;
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ret = map_regs(v3d, &v3d->core_regs[0], "core0");
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if (ret)
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goto dev_free;
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ident1 = V3D_READ(V3D_HUB_IDENT1);
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v3d->ver = (V3D_GET_FIELD(ident1, V3D_HUB_IDENT1_TVER) * 10 +
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V3D_GET_FIELD(ident1, V3D_HUB_IDENT1_REV));
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v3d->cores = V3D_GET_FIELD(ident1, V3D_HUB_IDENT1_NCORES);
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WARN_ON(v3d->cores > 1); /* multicore not yet implemented */
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if (v3d->ver < 41) {
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ret = map_regs(v3d, &v3d->gca_regs, "gca");
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if (ret)
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goto dev_free;
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}
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v3d->mmu_scratch = dma_alloc_wc(dev, 4096, &v3d->mmu_scratch_paddr,
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GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO);
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if (!v3d->mmu_scratch) {
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dev_err(dev, "Failed to allocate MMU scratch page\n");
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ret = -ENOMEM;
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goto dev_free;
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}
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pm_runtime_use_autosuspend(dev);
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pm_runtime_set_autosuspend_delay(dev, 50);
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pm_runtime_enable(dev);
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ret = drm_dev_init(&v3d->drm, &v3d_drm_driver, dev);
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if (ret)
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goto dma_free;
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platform_set_drvdata(pdev, drm);
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drm->dev_private = v3d;
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ret = v3d_gem_init(drm);
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if (ret)
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goto dev_destroy;
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v3d_irq_init(v3d);
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ret = drm_dev_register(drm, 0);
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if (ret)
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goto gem_destroy;
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return 0;
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gem_destroy:
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v3d_gem_destroy(drm);
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dev_destroy:
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drm_dev_put(drm);
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dma_free:
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dma_free_wc(dev, 4096, v3d->mmu_scratch, v3d->mmu_scratch_paddr);
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dev_free:
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kfree(v3d);
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return ret;
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}
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static int v3d_platform_drm_remove(struct platform_device *pdev)
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{
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struct drm_device *drm = platform_get_drvdata(pdev);
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struct v3d_dev *v3d = to_v3d_dev(drm);
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drm_dev_unregister(drm);
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v3d_gem_destroy(drm);
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drm_dev_put(drm);
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dma_free_wc(v3d->dev, 4096, v3d->mmu_scratch, v3d->mmu_scratch_paddr);
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return 0;
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}
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static struct platform_driver v3d_platform_driver = {
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.probe = v3d_platform_drm_probe,
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|
|
|
.remove = v3d_platform_drm_remove,
|
|
|
|
.driver = {
|
|
|
|
.name = "v3d",
|
|
|
|
.of_match_table = v3d_of_match,
|
|
|
|
},
|
|
|
|
};
|
|
|
|
|
|
|
|
static int __init v3d_drm_register(void)
|
|
|
|
{
|
|
|
|
return platform_driver_register(&v3d_platform_driver);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __exit v3d_drm_unregister(void)
|
|
|
|
{
|
|
|
|
platform_driver_unregister(&v3d_platform_driver);
|
|
|
|
}
|
|
|
|
|
|
|
|
module_init(v3d_drm_register);
|
|
|
|
module_exit(v3d_drm_unregister);
|
|
|
|
|
|
|
|
MODULE_ALIAS("platform:v3d-drm");
|
|
|
|
MODULE_DESCRIPTION("Broadcom V3D DRM Driver");
|
|
|
|
MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
|
|
|
|
MODULE_LICENSE("GPL v2");
|