From patchwork Tue Feb 28 02:21:42 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alan Previn X-Patchwork-Id: 13154369 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 655C7C7EE23 for ; Tue, 28 Feb 2023 02:22:05 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 2C1C010E495; Tue, 28 Feb 2023 02:21:55 +0000 (UTC) Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by gabe.freedesktop.org (Postfix) with ESMTPS id 8C97D10E47F; Tue, 28 Feb 2023 02:21:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1677550912; x=1709086912; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=coidPbNyh4kKl/gNL/XBc8Yx1IDRtEureySGm88LhVM=; b=cefKtVPaTWB8TdOsFX0R+HLdAOA3BlkDlQpZr6wHNNbcFvrBC29Or91t fr43eWsNYZZ79hRpdZ4EOL8I9wcmkHErrpjIZenfzHyUf5owxU5io5cmC X26QGAf+qX6kqD4FSQpQHFRd0u4ExFnG4aVkzcJoDKpuWWxujxc9pfikI wuPtPiRhqD56ElQugAfs9NRHqp5w3jo/UsnPmEprXimD0Iu0sBNd6G+zL 9nypcja5/soztkDSZ9GgSdKC/roUrW4LQqHFVx4QegIa1uYZ5r3QmcmRo m9ykZxr/Miyb1+qtqyVDeAMcxYwoW1QPByCt3kz8OIEMDd4MNqT+l3txZ w==; X-IronPort-AV: E=McAfee;i="6500,9779,10634"; a="334070722" X-IronPort-AV: E=Sophos;i="5.98,220,1673942400"; d="scan'208";a="334070722" Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Feb 2023 18:21:51 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6500,9779,10634"; a="919601716" X-IronPort-AV: E=Sophos;i="5.98,220,1673942400"; d="scan'208";a="919601716" Received: from aalteres-desk.fm.intel.com ([10.80.57.53]) by fmsmga006.fm.intel.com with ESMTP; 27 Feb 2023 18:21:51 -0800 From: Alan Previn To: intel-gfx@lists.freedesktop.org Date: Mon, 27 Feb 2023 18:21:42 -0800 Message-Id: <20230228022150.1657843-1-alan.previn.teres.alexis@intel.com> X-Mailer: git-send-email 2.39.0 MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v6 0/8] drm/i915/pxp: Add MTL PXP Support X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: dri-devel@lists.freedesktop.org, Alan Previn Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" This series enables PXP on MTL. On ADL/TGL platforms, we rely on the mei driver via the i915-mei PXP component interface to establish a connection to the security firmware via the HECI device interface. That interface is used to create and teardown the PXP ARB session. PXP ARB session is created when protected contexts are created. In this series, the front end behaviors and interfaces (uapi) remain the same. We add backend support for MTL but with MTL we directly use the GSC-CS engine on the MTL GPU device to send messages to the PXP (a.k.a. GSC a.k.a graphics-security) firmware. With MTL, the format of the message is slightly different with a 2-layer packetization that is explained in detail in Patch #3. Also, the second layer which is the actual PXP firmware packet is now rev'd to version 4.3 for MTL that is defined in Patch #5. Take note that Patch #4 adds the buffer allocation and gsccs-send- message without actually being called by the arb-creation code which gets added in Patch #5. Additionally, a seperate series being reviewed is introducing a change for session teardown (in pxp front- end layer that will need backend support by both legacy and gsccs). If we squash all of these together (buffer-alloc, send-message, arb-creation and, in future, session-termination), the single patch will be rather large. That said, we are keeping Patch #4 and #5 separate for now, but at merge time, we can squash them together if maintainer requires it. Changes from prior revs: v1 : - fixed when building with CONFIG_PXP disabled. - more alignment with gsc_mtl_header structure from the HDCP v2 : - (all following changes as per reviews from Daniele) - squashed Patch #1 from v1 into the next one. - replaced unnecessary "uses_gsccs" boolean in the pxp with "HAS_ENGINE(pxp->ctrl_gt, GSC0)". - moved the stashing of gsccs resources from a dynamically allocated opaque handle to an explicit sub-struct in 'struct intel_pxp'. - moved the buffer object allocations from Patch #1 of this series to Patch #5 (but keep the context allocation in Patch #1). - used the kernel default ppgtt for the gsccs context. - optimized the buffer allocation and deallocation code and drop the need to stash the drm_i915_gem_object. - use a macro with the right mmio reg base (depending on root-tile vs media-tile) along with common relative offset to access all KCR registers thus minimizing changes to the KCR register access codes. - fixed bugs in the heci packet request submission code in Patch #3 (of this series) - add comments in the mtl-gsc-heci-header regarding the host-session-handle. - re-use tee-mutex instead of introducing a gsccs specific cmd mutex. - minor cosmetic improvements in Patch #5. - before creating arb session, ensure intel_pxp_start first ensures the GSC FW is up and running. - use 2 second timeout for the pending-bit scenario when sending command to GSC-FW as per specs. - simplify intel_pxp_get_irq_gt with addition comments - redo Patch #7 to minimize the changes without introducing a common abstraction helper for suspend/resume/init/fini codes that have to change the kcr power state. v3 : - rebase onto latest drm-tip with the updated firmware session invalidation flow - on Patch#1: move 'mutex_init(&pxp->tee_mutex)' to a common init place in intel_pxp_init since its needed everywhere (Daniele) - on Patch#1: remove unneccasary "ce->vm = i915_vm_get(vm);" (Daniele) - on Patch#2: move the introduction of host_session_handle to Patch#4 where it starts getting used. - on Patch#4: move host-session-handle initialization to the allocate-resources during gsccs-init (away from Patch#5) and add the required call to PXP-firmware to cleanup the host-session-handle in destroy-resources during gsccs-fini - on Patch#5: add dispatching of arb session termination firmware cmd during session teardown (as per latest upstream flows) v4 : - Added proper initialization and cleanup of host-session-handle that the gsc firmware expects. - Fix the stream-session-key invalidation instruction for MTL. v5 : - In Patch #4, move the tee_mutex locking to after we check for valid vma allocations. - In Patch #5, wait for intel_huc_is_authenticated instead of intel_uc_fw_is_running(gsc-fw) before starting ARB session. - In Patch #5, increase the necessary timeouts at the top-level (PXP arb session creation / termination) to accomodate SLA of GSC firmware when busy with pending-bit responses. - In Patch #5, remove redundant host_session_handle init as we need a single handle that is already initialized during execution_resource init in Patch #4. - In Patch #8, increase the wait timeout for termination to align with the same SLA. Alan Previn (8): drm/i915/pxp: Add GSC-CS back-end resource init and cleanup drm/i915/pxp: Add MTL hw-plumbing enabling for KCR operation drm/i915/pxp: Add MTL helpers to submit Heci-Cmd-Packet to GSC drm/i915/pxp: Add GSC-CS backend to send GSC fw messages drm/i915/pxp: Add ARB session creation and cleanup drm/i915/pxp: MTL-KCR interrupt ctrl's are in GT-0 drm/i915/pxp: On MTL, KCR enabling doesn't wait on tee component drm/i915/pxp: Enable PXP with MTL-GSC-CS drivers/gpu/drm/i915/Makefile | 2 + drivers/gpu/drm/i915/gt/intel_gpu_commands.h | 2 + drivers/gpu/drm/i915/gt/intel_gt_irq.c | 3 +- .../i915/gt/uc/intel_gsc_uc_heci_cmd_submit.c | 108 ++++++ .../i915/gt/uc/intel_gsc_uc_heci_cmd_submit.h | 76 ++++ drivers/gpu/drm/i915/i915_pci.c | 1 + drivers/gpu/drm/i915/pxp/intel_pxp.c | 96 ++++- .../drm/i915/pxp/intel_pxp_cmd_interface_43.h | 25 ++ drivers/gpu/drm/i915/pxp/intel_pxp_debugfs.c | 11 +- drivers/gpu/drm/i915/pxp/intel_pxp_gsccs.c | 358 ++++++++++++++++++ drivers/gpu/drm/i915/pxp/intel_pxp_gsccs.h | 37 ++ drivers/gpu/drm/i915/pxp/intel_pxp_irq.c | 24 +- drivers/gpu/drm/i915/pxp/intel_pxp_irq.h | 8 + drivers/gpu/drm/i915/pxp/intel_pxp_pm.c | 3 +- drivers/gpu/drm/i915/pxp/intel_pxp_regs.h | 27 ++ drivers/gpu/drm/i915/pxp/intel_pxp_session.c | 25 +- drivers/gpu/drm/i915/pxp/intel_pxp_tee.c | 2 - drivers/gpu/drm/i915/pxp/intel_pxp_types.h | 20 + 18 files changed, 787 insertions(+), 41 deletions(-) create mode 100644 drivers/gpu/drm/i915/gt/uc/intel_gsc_uc_heci_cmd_submit.c create mode 100644 drivers/gpu/drm/i915/gt/uc/intel_gsc_uc_heci_cmd_submit.h create mode 100644 drivers/gpu/drm/i915/pxp/intel_pxp_gsccs.c create mode 100644 drivers/gpu/drm/i915/pxp/intel_pxp_gsccs.h create mode 100644 drivers/gpu/drm/i915/pxp/intel_pxp_regs.h