diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile index dadf879b228c..b2a8406b5398 100644 --- a/drivers/gpu/drm/i915/Makefile +++ b/drivers/gpu/drm/i915/Makefile @@ -282,6 +282,7 @@ i915-y += i915_perf.o i915-$(CONFIG_DRM_I915_PXP) += \ pxp/intel_pxp.o \ pxp/intel_pxp_cmd.o \ + pxp/intel_pxp_debugfs.o \ pxp/intel_pxp_irq.o \ pxp/intel_pxp_pm.o \ pxp/intel_pxp_session.o \ diff --git a/drivers/gpu/drm/i915/gt/intel_gt_debugfs.c b/drivers/gpu/drm/i915/gt/intel_gt_debugfs.c index 03fb4aefbf90..1fe19ccd2794 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt_debugfs.c +++ b/drivers/gpu/drm/i915/gt/intel_gt_debugfs.c @@ -10,6 +10,7 @@ #include "intel_gt_engines_debugfs.h" #include "intel_gt_pm_debugfs.h" #include "intel_sseu_debugfs.h" +#include "pxp/intel_pxp_debugfs.h" #include "uc/intel_uc_debugfs.h" void intel_gt_debugfs_register(struct intel_gt *gt) @@ -28,6 +29,7 @@ void intel_gt_debugfs_register(struct intel_gt *gt) intel_sseu_debugfs_register(gt, root); intel_uc_debugfs_register(>->uc, root); + intel_pxp_debugfs_register(>->pxp, root); } void intel_gt_debugfs_register_files(struct dentry *root, diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_debugfs.c b/drivers/gpu/drm/i915/pxp/intel_pxp_debugfs.c new file mode 100644 index 000000000000..10e1e45471f1 --- /dev/null +++ b/drivers/gpu/drm/i915/pxp/intel_pxp_debugfs.c @@ -0,0 +1,78 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2021 Intel Corporation + */ + +#include +#include + +#include "gt/intel_gt_debugfs.h" +#include "pxp/intel_pxp.h" +#include "pxp/intel_pxp_irq.h" +#include "i915_drv.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", yesno(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(>->irq_lock); + intel_pxp_irq_handler(pxp, GEN12_DISPLAY_PXP_STATE_TERMINATED_INTERRUPT); + spin_unlock_irq(>->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); +} diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_debugfs.h b/drivers/gpu/drm/i915/pxp/intel_pxp_debugfs.h new file mode 100644 index 000000000000..7e0c3d2f5d7e --- /dev/null +++ b/drivers/gpu/drm/i915/pxp/intel_pxp_debugfs.h @@ -0,0 +1,21 @@ +/* SPDX-License-Identifier: MIT */ +/* + * Copyright © 2021 Intel Corporation + */ + +#ifndef __INTEL_PXP_DEBUGFS_H__ +#define __INTEL_PXP_DEBUGFS_H__ + +struct intel_pxp; +struct dentry; + +#ifdef CONFIG_DRM_I915_PXP +void intel_pxp_debugfs_register(struct intel_pxp *pxp, struct dentry *root); +#else +static inline void +intel_pxp_debugfs_register(struct intel_pxp *pxp, struct dentry *root) +{ +} +#endif + +#endif /* __INTEL_PXP_DEBUGFS_H__ */