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// SPDX-License-Identifier: MIT
/*
* Copyright © 2021 Intel Corporation
*/
#include <linux/debugfs.h>
#include <linux/string_helpers.h>
#include <drm/drm_print.h>
#include "gt/intel_gt_debugfs.h"
#include "i915_drv.h"
#include "intel_pxp.h"
#include "intel_pxp_debugfs.h"
#include "intel_pxp_irq.h"
static int pxp_info_show(struct seq_file *m, void *data)
{
struct intel_pxp *pxp = m->private;
struct drm_printer p = drm_seq_file_printer(m);
bool enabled = intel_pxp_is_enabled(pxp);
if (!enabled) {
drm_printf(&p, "pxp disabled\n");
return 0;
}
drm_printf(&p, "active: %s\n", str_yes_no(intel_pxp_is_active(pxp)));
drm_printf(&p, "instance counter: %u\n", pxp->key_instance);
return 0;
}
DEFINE_INTEL_GT_DEBUGFS_ATTRIBUTE(pxp_info);
static int pxp_terminate_get(void *data, u64 *val)
{
/* nothing to read */
return -EPERM;
}
static int pxp_terminate_set(void *data, u64 val)
{
struct intel_pxp *pxp = data;
struct intel_gt *gt = pxp_to_gt(pxp);
if (!intel_pxp_is_active(pxp))
return -ENODEV;
/* simulate a termination interrupt */
spin_lock_irq(gt->irq_lock);
intel_pxp_irq_handler(pxp, GEN12_DISPLAY_PXP_STATE_TERMINATED_INTERRUPT);
spin_unlock_irq(gt->irq_lock);
if (!wait_for_completion_timeout(&pxp->termination,
msecs_to_jiffies(100)))
return -ETIMEDOUT;
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(pxp_terminate_fops, pxp_terminate_get, pxp_terminate_set, "%llx\n");
void intel_pxp_debugfs_register(struct intel_pxp *pxp, struct dentry *gt_root)
{
static const struct intel_gt_debugfs_file files[] = {
{ "info", &pxp_info_fops, NULL },
{ "terminate_state", &pxp_terminate_fops, NULL },
};
struct dentry *root;
if (!gt_root)
return;
if (!HAS_PXP((pxp_to_gt(pxp)->i915)))
return;
root = debugfs_create_dir("pxp", gt_root);
if (IS_ERR(root))
return;
intel_gt_debugfs_register_files(root, files, ARRAY_SIZE(files), pxp);
}
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