path: root/drivers/gpu/drm/msm/msm_drv.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (c) 2016-2018, 2020-2021 The Linux Foundation. All rights reserved.
 * Copyright (C) 2013 Red Hat
 * Author: Rob Clark <robdclark@gmail.com>
 */

#include <linux/dma-mapping.h>
#include <linux/kthread.h>
#include <linux/sched/mm.h>
#include <linux/uaccess.h>
#include <uapi/linux/sched/types.h>

#include <drm/drm_bridge.h>
#include <drm/drm_drv.h>
#include <drm/drm_file.h>
#include <drm/drm_ioctl.h>
#include <drm/drm_prime.h>
#include <drm/drm_of.h>
#include <drm/drm_vblank.h>

#include "disp/msm_disp_snapshot.h"
#include "msm_drv.h"
#include "msm_debugfs.h"
#include "msm_fence.h"
#include "msm_gem.h"
#include "msm_gpu.h"
#include "msm_kms.h"
#include "adreno/adreno_gpu.h"

/*
 * MSM driver version:
 * - 1.0.0 - initial interface
 * - 1.1.0 - adds madvise, and support for submits with > 4 cmd buffers
 * - 1.2.0 - adds explicit fence support for submit ioctl
 * - 1.3.0 - adds GMEM_BASE + NR_RINGS params, SUBMITQUEUE_NEW +
 *           SUBMITQUEUE_CLOSE ioctls, and MSM_INFO_IOVA flag for
 *           MSM_GEM_INFO ioctl.
 * - 1.4.0 - softpin, MSM_RELOC_BO_DUMP, and GEM_INFO support to set/get
 *           GEM object's debug name
 * - 1.5.0 - Add SUBMITQUERY_QUERY ioctl
 * - 1.6.0 - Syncobj support
 * - 1.7.0 - Add MSM_PARAM_SUSPENDS to access suspend count
 * - 1.8.0 - Add MSM_BO_CACHED_COHERENT for supported GPUs (a6xx)
 * - 1.9.0 - Add MSM_SUBMIT_FENCE_SN_IN
 */
#define MSM_VERSION_MAJOR	1
#define MSM_VERSION_MINOR	9
#define MSM_VERSION_PATCHLEVEL	0

static const struct drm_mode_config_funcs mode_config_funcs = {
	.fb_create = msm_framebuffer_create,
	.output_poll_changed = drm_fb_helper_output_poll_changed,
	.atomic_check = drm_atomic_helper_check,
	.atomic_commit = drm_atomic_helper_commit,
};

static const struct drm_mode_config_helper_funcs mode_config_helper_funcs = {
	.atomic_commit_tail = msm_atomic_commit_tail,
};

#ifdef CONFIG_DRM_FBDEV_EMULATION
static bool fbdev = true;
MODULE_PARM_DESC(fbdev, "Enable fbdev compat layer");
module_param(fbdev, bool, 0600);
#endif

static char *vram = "16m";
MODULE_PARM_DESC(vram, "Configure VRAM size (for devices without IOMMU/GPUMMU)");
module_param(vram, charp, 0);

bool dumpstate;
MODULE_PARM_DESC(dumpstate, "Dump KMS state on errors");
module_param(dumpstate, bool, 0600);

static bool modeset = true;
MODULE_PARM_DESC(modeset, "Use kernel modesetting [KMS] (1=on (default), 0=disable)");
module_param(modeset, bool, 0600);

static irqreturn_t msm_irq(int irq, void *arg)
{
	struct drm_device *dev = arg;
	struct msm_drm_private *priv = dev->dev_private;
	struct msm_kms *kms = priv->kms;

	BUG_ON(!kms);

	return kms->funcs->irq(kms);
}

static void msm_irq_preinstall(struct drm_device *dev)
{
	struct msm_drm_private *priv = dev->dev_private;
	struct msm_kms *kms = priv->kms;

	BUG_ON(!kms);

	kms->funcs->irq_preinstall(kms);
}

static int msm_irq_postinstall(struct drm_device *dev)
{
	struct msm_drm_private *priv = dev->dev_private;
	struct msm_kms *kms = priv->kms;

	BUG_ON(!kms);

	if (kms->funcs->irq_postinstall)
		return kms->funcs->irq_postinstall(kms);

	return 0;
}

static int msm_irq_install(struct drm_device *dev, unsigned int irq)
{
	struct msm_drm_private *priv = dev->dev_private;
	struct msm_kms *kms = priv->kms;
	int ret;

	if (irq == IRQ_NOTCONNECTED)
		return -ENOTCONN;

	msm_irq_preinstall(dev);

	ret = request_irq(irq, msm_irq, 0, dev->driver->name, dev);
	if (ret)
		return ret;

	kms->irq_requested = true;

	ret = msm_irq_postinstall(dev);
	if (ret) {
		free_irq(irq, dev