diff options
Diffstat (limited to 'drivers/gpu/drm/i915/pxp/intel_pxp_types.h')
-rw-r--r-- | drivers/gpu/drm/i915/pxp/intel_pxp_types.h | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_types.h b/drivers/gpu/drm/i915/pxp/intel_pxp_types.h new file mode 100644 index 000000000..1a8765866 --- /dev/null +++ b/drivers/gpu/drm/i915/pxp/intel_pxp_types.h @@ -0,0 +1,120 @@ +/* SPDX-License-Identifier: MIT */ +/* + * Copyright(c) 2020, Intel Corporation. All rights reserved. + */ + +#ifndef __INTEL_PXP_TYPES_H__ +#define __INTEL_PXP_TYPES_H__ + +#include <linux/completion.h> +#include <linux/mutex.h> +#include <linux/types.h> +#include <linux/workqueue.h> + +struct intel_context; +struct intel_gt; +struct i915_pxp_component; +struct drm_i915_private; + +/** + * struct intel_pxp - pxp state + */ +struct intel_pxp { + /** + * @ctrl_gt: poiner to the tile that owns the controls for PXP subsystem assets that + * the VDBOX, the KCR engine (and GSC CS depending on the platform) + */ + struct intel_gt *ctrl_gt; + + /** + * @kcr_base: base mmio offset for the KCR engine which is different on legacy platforms + * vs newer platforms where the KCR is inside the media-tile. + */ + u32 kcr_base; + + /** + * @gsccs_res: resources for request submission for platforms that have a GSC engine. + */ + struct gsccs_session_resources { + u64 host_session_handle; /* used by firmware to link commands to sessions */ + struct intel_context *ce; /* context for gsc command submission */ + + struct i915_vma *pkt_vma; /* GSC FW cmd packet vma */ + void *pkt_vaddr; /* GSC FW cmd packet virt pointer */ + + struct i915_vma *bb_vma; /* HECI_PKT batch buffer vma */ + void *bb_vaddr; /* HECI_PKT batch buffer virt pointer */ + } gsccs_res; + + /** + * @pxp_component: i915_pxp_component struct of the bound mei_pxp + * module. Only set and cleared inside component bind/unbind functions, + * which are protected by &tee_mutex. + */ + struct i915_pxp_component *pxp_component; + + /** + * @dev_link: Enforce module relationship for power management ordering. + */ + struct device_link *dev_link; + /** + * @pxp_component_added: track if the pxp component has been added. + * Set and cleared in tee init and fini functions respectively. + */ + bool pxp_component_added; + + /** @ce: kernel-owned context used for PXP operations */ + struct intel_context *ce; + + /** @arb_mutex: protects arb session start */ + struct mutex arb_mutex; + /** + * @arb_is_valid: tracks arb session status. + * After a teardown, the arb session can still be in play on the HW + * even if the keys are gone, so we can't rely on the HW state of the + * session to know if it's valid and need to track the status in SW. + */ + bool arb_is_valid; + + /** + * @key_instance: tracks which key instance we're on, so we can use it + * to determine if an object was created using the current key or a + * previous one. + */ + u32 key_instance; + + /** @tee_mutex: protects the tee channel binding and messaging. */ + struct mutex tee_mutex; + + /** @stream_cmd: LMEM obj used to send stream PXP commands to the GSC */ + struct { + struct drm_i915_gem_object *obj; /* contains PXP command memory */ + void *vaddr; /* virtual memory for PXP command */ + } stream_cmd; + + /** + * @hw_state_invalidated: if the HW perceives an attack on the integrity + * of the encryption it will invalidate the keys and expect SW to + * re-initialize the session. We keep track of this state to make sure + * we only re-start the arb session when required. + */ + bool hw_state_invalidated; + + /** @irq_enabled: tracks the status of the kcr irqs */ + bool irq_enabled; + /** + * @termination: tracks the status of a pending termination. Only + * re-initialized under gt->irq_lock and completed in &session_work. + */ + struct completion termination; + + /** @session_work: worker that manages session events. */ + struct work_struct session_work; + /** @session_events: pending session events, protected with gt->irq_lock. */ + u32 session_events; +#define PXP_TERMINATION_REQUEST BIT(0) +#define PXP_TERMINATION_COMPLETE BIT(1) +#define PXP_INVAL_REQUIRED BIT(2) +}; + +#endif /* __INTEL_PXP_TYPES_H__ */ |