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1// SPDX-License-Identifier: MIT2/*3 * Copyright © 2021 Intel Corporation4 */5 6#include <linux/debugfs.h>7#include <linux/string_helpers.h>8 9#include <drm/drm_print.h>10 11#include "gt/intel_gt_debugfs.h"12 13#include "i915_drv.h"14 15#include "intel_pxp.h"16#include "intel_pxp_debugfs.h"17#include "intel_pxp_gsccs.h"18#include "intel_pxp_irq.h"19#include "intel_pxp_types.h"20 21static int pxp_info_show(struct seq_file *m, void *data)22{23 struct intel_pxp *pxp = m->private;24 struct drm_printer p = drm_seq_file_printer(m);25 26 if (!intel_pxp_is_enabled(pxp)) {27 drm_printf(&p, "pxp disabled\n");28 return 0;29 }30 31 drm_printf(&p, "active: %s\n", str_yes_no(intel_pxp_is_active(pxp)));32 drm_printf(&p, "instance counter: %u\n", pxp->key_instance);33 34 return 0;35}36 37DEFINE_SHOW_ATTRIBUTE(pxp_info);38 39static int pxp_terminate_get(void *data, u64 *val)40{41 /* nothing to read */42 return -EPERM;43}44 45static int pxp_terminate_set(void *data, u64 val)46{47 struct intel_pxp *pxp = data;48 struct intel_gt *gt = pxp->ctrl_gt;49 int timeout_ms;50 51 if (!intel_pxp_is_active(pxp))52 return -ENODEV;53 54 /* simulate a termination interrupt */55 spin_lock_irq(gt->irq_lock);56 intel_pxp_irq_handler(pxp, GEN12_DISPLAY_PXP_STATE_TERMINATED_INTERRUPT);57 spin_unlock_irq(gt->irq_lock);58 59 timeout_ms = intel_pxp_get_backend_timeout_ms(pxp);60 61 if (!wait_for_completion_timeout(&pxp->termination,62 msecs_to_jiffies(timeout_ms)))63 return -ETIMEDOUT;64 65 return 0;66}67 68DEFINE_SIMPLE_ATTRIBUTE(pxp_terminate_fops, pxp_terminate_get, pxp_terminate_set, "%llx\n");69 70void intel_pxp_debugfs_register(struct intel_pxp *pxp)71{72 struct drm_minor *minor;73 struct dentry *pxproot;74 75 if (!intel_pxp_is_supported(pxp))76 return;77 78 minor = pxp->ctrl_gt->i915->drm.primary;79 if (!minor->debugfs_root)80 return;81 82 pxproot = debugfs_create_dir("pxp", minor->debugfs_root);83 if (IS_ERR(pxproot))84 return;85 86 debugfs_create_file("info", 0444, pxproot,87 pxp, &pxp_info_fops);88 89 debugfs_create_file("terminate_state", 0644, pxproot,90 pxp, &pxp_terminate_fops);91}92