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git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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390cf1b28b
2 debugfs files, one to query the current status of the pxp session and one
to trigger an invalidation for testing.
v2: rename debugfs, fix date (Alan)
v12: rebased to latest drm-tip (rename of files/structs from
debugfs_gt to intel_debugfs_gt caused compiler errors).
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Reviewed-by : Alan Previn <alan.previn.teres.alexis@intel.com>
Reviewed-by: Alan Previn <alan.previn.teres.alexis@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210924191452.1539378-16-alan.previn.teres.alexis@intel.com
79 lines
1.8 KiB
C
79 lines
1.8 KiB
C
// 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 <drm/drm_print.h>
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#include "gt/intel_gt_debugfs.h"
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#include "pxp/intel_pxp.h"
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#include "pxp/intel_pxp_irq.h"
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#include "i915_drv.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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bool enabled = intel_pxp_is_enabled(pxp);
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if (!enabled) {
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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", yesno(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_INTEL_GT_DEBUGFS_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_to_gt(pxp);
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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(>->irq_lock);
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intel_pxp_irq_handler(pxp, GEN12_DISPLAY_PXP_STATE_TERMINATED_INTERRUPT);
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spin_unlock_irq(>->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, struct dentry *gt_root)
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{
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static const struct intel_gt_debugfs_file files[] = {
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{ "info", &pxp_info_fops, NULL },
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{ "terminate_state", &pxp_terminate_fops, NULL },
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};
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struct dentry *root;
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if (!gt_root)
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return;
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if (!HAS_PXP((pxp_to_gt(pxp)->i915)))
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return;
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root = debugfs_create_dir("pxp", gt_root);
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if (IS_ERR(root))
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return;
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intel_gt_debugfs_register_files(root, files, ARRAY_SIZE(files), pxp);
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}
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