blob: 2a85fa68ffea51042b4c08dd8dc3497153590197 [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0+
/* Copyright (C) 2014-2018 Broadcom */
/**
* DOC: Broadcom V3D Graphics Driver
*
* This driver supports the Broadcom V3D 3.3 and 4.1 OpenGL ES GPUs.
* For V3D 2.x support, see the VC4 driver.
*
* Currently only single-core rendering using the binner and renderer
* is supported. The TFU (texture formatting unit) and V3D 4.x's CSD
* (compute shader dispatch) are not yet supported.
*/
#include <linux/clk.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 "uapi/drm/v3d_drm.h"
#include "v3d_drv.h"
#include "v3d_regs.h"
#define DRIVER_NAME "v3d"
#define DRIVER_DESC "Broadcom V3D graphics"
#define DRIVER_DATE "20180419"
#define DRIVER_MAJOR 1
#define DRIVER_MINOR 0
#define DRIVER_PATCHLEVEL 0
#ifdef CONFIG_PM
static int v3d_runtime_suspend(struct device *dev)
{
struct drm_device *drm = dev_get_drvdata(dev);
struct v3d_dev *v3d = to_v3d_dev(drm);
v3d_irq_disable(v3d);
clk_disable_unprepare(v3d->clk);
return 0;
}
static int v3d_runtime_resume(struct device *dev)
{
struct drm_device *drm = dev_get_drvdata(dev);
struct v3d_dev *v3d = to_v3d_dev(drm);
int ret;
ret = clk_prepare_enable(v3d->clk);
if (ret != 0)
return ret;
/* XXX: VPM base */
v3d_mmu_set_page_table(v3d);
v3d_irq_enable(v3d);
return 0;
}
#endif
static const struct dev_pm_ops v3d_v3d_pm_ops = {
SET_RUNTIME_PM_OPS(v3d_runtime_suspend, v3d_runtime_resume, NULL)
};
static int v3d_get_param_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct v3d_dev *v3d = to_v3d_dev(dev);
struct drm_v3d_get_param *args = data;
int ret;
static const u32 reg_map[] = {
[DRM_V3D_PARAM_V3D_UIFCFG] = V3D_HUB_UIFCFG,
[DRM_V3D_PARAM_V3D_HUB_IDENT1] = V3D_HUB_IDENT1,
[DRM_V3D_PARAM_V3D_HUB_IDENT2] = V3D_HUB_IDENT2,
[DRM_V3D_PARAM_V3D_HUB_IDENT3] = V3D_HUB_IDENT3,
[DRM_V3D_PARAM_V3D_CORE0_IDENT0] = V3D_CTL_IDENT0,
[DRM_V3D_PARAM_V3D_CORE0_IDENT1] = V3D_CTL_IDENT1,
[DRM_V3D_PARAM_V3D_CORE0_IDENT2] = V3D_CTL_IDENT2,
};
if (args->pad != 0)
return -EINVAL;
/* Note that DRM_V3D_PARAM_V3D_CORE0_IDENT0 is 0, so we need
* to explicitly allow it in the "the register in our
* parameter map" check.
*/
if (args->param < ARRAY_SIZE(reg_map) &&
(reg_map[args->param] ||
args->param == DRM_V3D_PARAM_V3D_CORE0_IDENT0)) {
u32 offset = reg_map[args->param];
if (args->value != 0)
return -EINVAL;
ret = pm_runtime_get_sync(v3d->dev);
if (args->param >= DRM_V3D_PARAM_V3D_CORE0_IDENT0 &&
args->param <= DRM_V3D_PARAM_V3D_CORE0_IDENT2) {
args->value = V3D_CORE_READ(0, offset);
} else {
args->value = V3D_READ(offset);
}
pm_runtime_mark_last_busy(v3d->dev);
pm_runtime_put_autosuspend(v3d->dev);
return 0;
}
/* Any params that aren't just register reads would go here. */
DRM_DEBUG("Unknown parameter %d\n", args->param);
return -EINVAL;
}
static int
v3d_open(struct drm_device *dev, struct drm_file *file)
{
struct v3d_dev *v3d = to_v3d_dev(dev);
struct v3d_file_priv *v3d_priv;
struct drm_sched_rq *rq;
int i;
v3d_priv = kzalloc(sizeof(*v3d_priv), GFP_KERNEL);
if (!v3d_priv)
return -ENOMEM;
v3d_priv->v3d = v3d;
for (i = 0; i < V3D_MAX_QUEUES; i++) {
rq = &v3d->queue[i].sched.sched_rq[DRM_SCHED_PRIORITY_NORMAL];
drm_sched_entity_init(&v3d_priv->sched_entity[i], &rq, 1, NULL);
}
file->driver_priv = v3d_priv;
return 0;
}
static void
v3d_postclose(struct drm_device *dev, struct drm_file *file)
{
struct v3d_file_priv *v3d_priv = file->driver_priv;
enum v3d_queue q;
for (q = 0; q < V3D_MAX_QUEUES; q++) {
drm_sched_entity_destroy(&v3d_priv->sched_entity[q]);
}
kfree(v3d_priv);
}
static const struct file_operations v3d_drm_fops = {
.owner = THIS_MODULE,
.open = drm_open,
.release = drm_release,
.unlocked_ioctl = drm_ioctl,
.mmap = v3d_mmap,
.poll = drm_poll,
.read = drm_read,
.compat_ioctl = drm_compat_ioctl,
.llseek = noop_llseek,
};
/* DRM_AUTH is required on SUBMIT_CL for now, while we don't have GMP
* protection between clients. Note that render nodes would be be
* able to submit CLs that could access BOs from clients authenticated
* with the master node.
*/
static const struct drm_ioctl_desc v3d_drm_ioctls[] = {
DRM_IOCTL_DEF_DRV(V3D_SUBMIT_CL, v3d_submit_cl_ioctl, DRM_RENDER_ALLOW | DRM_AUTH),
DRM_IOCTL_DEF_DRV(V3D_WAIT_BO, v3d_wait_bo_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(V3D_CREATE_BO, v3d_create_bo_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(V3D_MMAP_BO, v3d_mmap_bo_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(V3D_GET_PARAM, v3d_get_param_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(V3D_GET_BO_OFFSET, v3d_get_bo_offset_ioctl, DRM_RENDER_ALLOW),
};
static const struct vm_operations_struct v3d_vm_ops = {
.fault = v3d_gem_fault,
.open = drm_gem_vm_open,
.close = drm_gem_vm_close,
};
static struct drm_driver v3d_drm_driver = {
.driver_features = (DRIVER_GEM |
DRIVER_RENDER |
DRIVER_PRIME |
DRIVER_SYNCOBJ),
.open = v3d_open,
.postclose = v3d_postclose,
#if defined(CONFIG_DEBUG_FS)
.debugfs_init = v3d_debugfs_init,
#endif
.gem_free_object_unlocked = v3d_free_object,
.gem_vm_ops = &v3d_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 = drm_gem_prime_export,
.gem_prime_res_obj = v3d_prime_res_obj,
.gem_prime_get_sg_table = v3d_prime_get_sg_table,
.gem_prime_import_sg_table = v3d_prime_import_sg_table,
.gem_prime_mmap = v3d_prime_mmap,
.ioctls = v3d_drm_ioctls,
.num_ioctls = ARRAY_SIZE(v3d_drm_ioctls),
.fops = &v3d_drm_fops,
.name = DRIVER_NAME,
.desc = DRIVER_DESC,
.date = DRIVER_DATE,
.major = DRIVER_MAJOR,
.minor = DRIVER_MINOR,
.patchlevel = DRIVER_PATCHLEVEL,
};
static const struct of_device_id v3d_of_match[] = {
{ .compatible = "brcm,7268-v3d" },
{ .compatible = "brcm,7278-v3d" },
{},
};
MODULE_DEVICE_TABLE(of, v3d_of_match);
static int
map_regs(struct v3d_dev *v3d, void __iomem **regs, const char *name)
{
struct resource *res =
platform_get_resource_byname(v3d->pdev, IORESOURCE_MEM, name);
*regs = devm_ioremap_resource(v3d->dev, res);
return PTR_ERR_OR_ZERO(*regs);
}
static int v3d_platform_drm_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct drm_device *drm;
struct v3d_dev *v3d;
int ret;
u32 ident1;
dev->coherent_dma_mask = DMA_BIT_MASK(36);
v3d = kzalloc(sizeof(*v3d), GFP_KERNEL);
if (!v3d)
return -ENOMEM;
v3d->dev = dev;
v3d->pdev = pdev;
drm = &v3d->drm;
ret = map_regs(v3d, &v3d->bridge_regs, "bridge");
if (ret)
goto dev_free;
ret = map_regs(v3d, &v3d->hub_regs, "hub");
if (ret)
goto dev_free;
ret = map_regs(v3d, &v3d->core_regs[0], "core0");
if (ret)
goto dev_free;
ident1 = V3D_READ(V3D_HUB_IDENT1);
v3d->ver = (V3D_GET_FIELD(ident1, V3D_HUB_IDENT1_TVER) * 10 +
V3D_GET_FIELD(ident1, V3D_HUB_IDENT1_REV));
v3d->cores = V3D_GET_FIELD(ident1, V3D_HUB_IDENT1_NCORES);
WARN_ON(v3d->cores > 1); /* multicore not yet implemented */
if (v3d->ver < 41) {
ret = map_regs(v3d, &v3d->gca_regs, "gca");
if (ret)
goto dev_free;
}
v3d->mmu_scratch = dma_alloc_wc(dev, 4096, &v3d->mmu_scratch_paddr,
GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO);
if (!v3d->mmu_scratch) {
dev_err(dev, "Failed to allocate MMU scratch page\n");
ret = -ENOMEM;
goto dev_free;
}
pm_runtime_use_autosuspend(dev);
pm_runtime_set_autosuspend_delay(dev, 50);
pm_runtime_enable(dev);
ret = drm_dev_init(&v3d->drm, &v3d_drm_driver, dev);
if (ret)
goto dma_free;
platform_set_drvdata(pdev, drm);
drm->dev_private = v3d;
ret = v3d_gem_init(drm);
if (ret)
goto dev_destroy;
v3d_irq_init(v3d);
ret = drm_dev_register(drm, 0);
if (ret)
goto gem_destroy;
return 0;
gem_destroy:
v3d_gem_destroy(drm);
dev_destroy:
drm_dev_put(drm);
dma_free:
dma_free_wc(dev, 4096, v3d->mmu_scratch, v3d->mmu_scratch_paddr);
dev_free:
kfree(v3d);
return ret;
}
static int v3d_platform_drm_remove(struct platform_device *pdev)
{
struct drm_device *drm = platform_get_drvdata(pdev);
struct v3d_dev *v3d = to_v3d_dev(drm);
drm_dev_unregister(drm);
v3d_gem_destroy(drm);
drm_dev_put(drm);
dma_free_wc(v3d->dev, 4096, v3d->mmu_scratch, v3d->mmu_scratch_paddr);
return 0;
}
static struct platform_driver v3d_platform_driver = {
.probe = v3d_platform_drm_probe,
.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");