88 lines
1.9 KiB
C
88 lines
1.9 KiB
C
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// SPDX-License-Identifier: MIT
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/*
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* Copyright © 2021 Intel Corporation
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*/
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#include <linux/debugfs.h>
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#include <linux/string_helpers.h>
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#include <drm/drm_print.h>
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#include "gt/intel_gt_debugfs.h"
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#include "i915_drv.h"
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#include "intel_pxp.h"
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#include "intel_pxp_debugfs.h"
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#include "intel_pxp_irq.h"
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#include "intel_pxp_types.h"
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static int pxp_info_show(struct seq_file *m, void *data)
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{
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struct intel_pxp *pxp = m->private;
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struct drm_printer p = drm_seq_file_printer(m);
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if (!intel_pxp_is_enabled(pxp)) {
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drm_printf(&p, "pxp disabled\n");
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return 0;
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}
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drm_printf(&p, "active: %s\n", str_yes_no(intel_pxp_is_active(pxp)));
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drm_printf(&p, "instance counter: %u\n", pxp->key_instance);
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return 0;
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}
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DEFINE_SHOW_ATTRIBUTE(pxp_info);
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static int pxp_terminate_get(void *data, u64 *val)
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{
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/* nothing to read */
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return -EPERM;
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}
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static int pxp_terminate_set(void *data, u64 val)
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{
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struct intel_pxp *pxp = data;
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struct intel_gt *gt = pxp->ctrl_gt;
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if (!intel_pxp_is_active(pxp))
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return -ENODEV;
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/* simulate a termination interrupt */
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spin_lock_irq(gt->irq_lock);
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intel_pxp_irq_handler(pxp, GEN12_DISPLAY_PXP_STATE_TERMINATED_INTERRUPT);
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spin_unlock_irq(gt->irq_lock);
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if (!wait_for_completion_timeout(&pxp->termination,
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msecs_to_jiffies(100)))
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return -ETIMEDOUT;
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return 0;
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}
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DEFINE_SIMPLE_ATTRIBUTE(pxp_terminate_fops, pxp_terminate_get, pxp_terminate_set, "%llx\n");
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void intel_pxp_debugfs_register(struct intel_pxp *pxp)
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{
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struct drm_minor *minor;
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struct dentry *pxproot;
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if (!intel_pxp_is_supported(pxp))
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return;
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minor = pxp->ctrl_gt->i915->drm.primary;
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if (!minor->debugfs_root)
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return;
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pxproot = debugfs_create_dir("pxp", minor->debugfs_root);
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if (IS_ERR(pxproot))
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return;
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debugfs_create_file("info", 0444, pxproot,
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pxp, &pxp_info_fops);
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debugfs_create_file("terminate_state", 0644, pxproot,
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pxp, &pxp_terminate_fops);
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}
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