path: root/drivers/gpu/drm/xe/xe_device.c

// SPDX-License-Identifier: MIT
/*
 * Copyright © 2021 Intel Corporation
 */

#include "xe_device.h"

#include <linux/aperture.h>
#include <linux/delay.h>
#include <linux/fault-inject.h>
#include <linux/units.h>

#include <drm/drm_atomic_helper.h>
#include <drm/drm_client.h>
#include <drm/drm_gem_ttm_helper.h>
#include <drm/drm_ioctl.h>
#include <drm/drm_managed.h>
#include <drm/drm_print.h>
#include <uapi/drm/xe_drm.h>

#include "display/xe_display.h"
#include "instructions/xe_gpu_commands.h"
#include "regs/xe_gt_regs.h"
#include "regs/xe_regs.h"
#include "xe_bo.h"
#include "xe_debugfs.h"
#include "xe_devcoredump.h"
#include "xe_dma_buf.h"
#include "xe_drm_client.h"
#include "xe_drv.h"
#include "xe_exec.h"
#include "xe_exec_queue.h"
#include "xe_force_wake.h"
#include "xe_ggtt.h"
#include "xe_gsc_proxy.h"
#include "xe_gt.h"
#include "xe_gt_mcr.h"
#include "xe_gt_printk.h"
#include "xe_gt_sriov_vf.h"
#include "xe_guc.h"
#include "xe_guc_pc.h"
#include "xe_hw_engine_group.h"
#include "xe_hwmon.h"
#include "xe_irq.h"
#include "xe_memirq.h"
#include "xe_mmio.h"
#include "xe_module.h"
#include "xe_oa.h"
#include "xe_observation.h"
#include "xe_pat.h"
#include "xe_pcode.h"
#include "xe_pm.h"
#include "xe_pmu.h"
#include "xe_pxp.h"
#include "xe_query.h"
#include "xe_shrinker.h"
#include "xe_survivability_mode.h"
#include "xe_sriov.h"
#include "xe_tile.h"
#include "xe_ttm_stolen_mgr.h"
#include "xe_ttm_sys_mgr.h"
#include "xe_vm.h"
#include "xe_vram.h"
#include "xe_vsec.h"
#include "xe_wait_user_fence.h"
#include "xe_wa.h"

#include <generated/xe_wa_oob.h>

static int xe_file_open(struct drm_device *dev, struct drm_file *file)
{
	struct xe_device *xe = to_xe_device(dev);
	struct xe_drm_client *client;
	struct xe_file *xef;
	int ret = -ENOMEM;
	struct task_struct *task = NULL;

	xef = kzalloc(sizeof(*xef), GFP_KERNEL);
	if (!xef)
		return ret;

	client = xe_drm_client_alloc();
	if (!client) {
		kfree(xef);
		return ret;
	}

	xef->drm = file;
	xef->client = client;
	xef->xe = xe;

	mutex_init(&xef->vm.lock);
	xa_init_flags(&xef->vm.xa, XA_FLAGS_ALLOC1);

	mutex_init(&xef->exec_queue.lock);
	xa_init_flags(&xef->exec_queue.xa, XA_FLAGS_ALLOC1);

	file->driver_priv = xef;
	kref_init(&xef->refcount);

	task = get_pid_task(rcu_access_pointer(file->pid), PIDTYPE_PID);
	if (task) {
		xef->process_name = kstrdup(task->comm, GFP_KERNEL);
		xef->pid = task->pid;
		put_task_struct(task);
	}

	return 0;
}

static void xe_file_destroy(struct kref *ref)
{
	struct xe_file *xef = container_of(ref, struct xe_file, refcount);

	xa_destroy(&xef->exec_queue.xa);
	mutex_destroy(&xef->exec_queue.lock);
	xa_destroy(&xef->vm.xa);
	mutex_destroy(&xef->vm.lock);

	xe_drm_client_put(xef->client);
	kfree(xef->process_name);
	kfree(xef);
}

/**
 * xe_file_get() - Take a reference to the xe file object
 * @xef: Pointer to the xe file
 *
 * Anyone with a pointer to xef must take a reference to the xe file
 * object using this call.
 *
 * Return: xe file pointer
 */
struct xe_file *xe_file_get(struct xe_file *xef)
{
	kref_get(&xef->refcount);
	return xef;
}

/**
 * xe_file_put() - Drop a reference to the xe file object
 * @xef: Pointer to the xe file
 *
 * Used to drop reference to the xef object
 */
void xe_file_put(struct xe_file *xef)
{
	kref_put(&xef->refcount, xe_file_destroy);
}

static void xe_file_close(struct