From patchwork Wed Mar 6 02:42:48 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Suraj Kandpal X-Patchwork-Id: 13583225 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 C6D1AC54798 for ; Wed, 6 Mar 2024 02:45:11 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 18F59112E2F; Wed, 6 Mar 2024 02:45:11 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="QrRIc4DG"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.12]) by gabe.freedesktop.org (Postfix) with ESMTPS id 7C361112E2F; Wed, 6 Mar 2024 02:45:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1709693109; x=1741229109; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=alN+uPJu/8NGBqgykZe6aRp2zZCU6dU0nrxhzjYhCXM=; b=QrRIc4DGaJ+fBNP4GbK6EcEDWYsFYHbUZJAG9b2WM5L9lETnnr1Ou+Oc dVPobFGPXfsutKEWYHfqZFv0oyWESCsDMMuMSA3BReaPTuY4YZX2Caf5J f5hrExD0bPTbS970fCYawNmRWQxvopb0wQ63Fz270t3A5AvEW6iMlGc/v Hw7JHnVkVOj/afZJeC8Dl488ndaGY8qlzNXgZhonFCTXaDzsSzcDPidTc LLVl7UoMvYxVx5iArC7cfE24SxGQyAJ8jpJ84gbPuKw6wvtz1SMB3aUNG NCECtDr6qglGWhbgvLYPIyFfjFB044f1EVkYG8P/O2cZhQfMHWeZlPENQ A==; X-IronPort-AV: E=McAfee;i="6600,9927,11004"; a="8050011" X-IronPort-AV: E=Sophos;i="6.06,207,1705392000"; d="scan'208";a="8050011" Received: from orviesa008.jf.intel.com ([10.64.159.148]) by fmvoesa106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Mar 2024 18:45:09 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.06,207,1705392000"; d="scan'208";a="10175845" Received: from kandpal-x299-ud4-pro.iind.intel.com ([10.190.239.32]) by orviesa008.jf.intel.com with ESMTP; 05 Mar 2024 18:45:07 -0800 From: Suraj Kandpal To: intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org Cc: Suraj Kandpal , Arun R Murthy Subject: [PATCH 4/4] drm/xe/hdcp: Enable HDCP for XE Date: Wed, 6 Mar 2024 08:12:48 +0530 Message-ID: <20240306024247.1857881-6-suraj.kandpal@intel.com> X-Mailer: git-send-email 2.43.2 In-Reply-To: <20240306024247.1857881-2-suraj.kandpal@intel.com> References: <20240306024247.1857881-2-suraj.kandpal@intel.com> MIME-Version: 1.0 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: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Enable HDCP for Xe by defining functions which take care of interaction of HDCP as a client with the GSC CS interface. Add intel_hdcp_gsc_message to Makefile and add corresponding changes to xe_hdcp_gsc.c to make it build. --v2 -add kfree at appropriate place [Daniele] -remove useless define [Daniele] -move host session logic to xe_gsc_submit.c [Daniele] -call xe_gsc_check_and_update_pending directly in an if condition [Daniele] -use xe_device instead of drm_i915_private [Daniele] --v3 -use xe prefix for newly exposed function [Daniele] -remove client specific defines from intel_gsc_mtl_header [Daniele] -add missing kfree() [Daniele] -have NULL check for hdcp_message in finish function [Daniele] -dont have too many variable declarations in the same line [Daniele] --v4 -don't point the hdcp_message structure in xe_device to anything until it properly gets initialized [Daniele] --v5 -Squash commits for buildability --v6 -Order includes alphabetically [Lucas] Signed-off-by: Suraj Kandpal Reviewed-by: Arun R Murthy --- drivers/gpu/drm/xe/Makefile | 1 + drivers/gpu/drm/xe/display/xe_hdcp_gsc.c | 202 ++++++++++++++++++++++- drivers/gpu/drm/xe/xe_gsc_submit.c | 15 ++ drivers/gpu/drm/xe/xe_gsc_submit.h | 1 + 4 files changed, 214 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/xe/Makefile b/drivers/gpu/drm/xe/Makefile index c531210695db..2b654c908ff3 100644 --- a/drivers/gpu/drm/xe/Makefile +++ b/drivers/gpu/drm/xe/Makefile @@ -254,6 +254,7 @@ xe-$(CONFIG_DRM_XE_DISPLAY) += \ i915-display/intel_global_state.o \ i915-display/intel_gmbus.o \ i915-display/intel_hdcp.o \ + i915-display/intel_hdcp_gsc_message.o \ i915-display/intel_hdmi.o \ i915-display/intel_hotplug.o \ i915-display/intel_hotplug_irq.o \ diff --git a/drivers/gpu/drm/xe/display/xe_hdcp_gsc.c b/drivers/gpu/drm/xe/display/xe_hdcp_gsc.c index 3af5a86db3aa..dcde1d0ac1f8 100644 --- a/drivers/gpu/drm/xe/display/xe_hdcp_gsc.c +++ b/drivers/gpu/drm/xe/display/xe_hdcp_gsc.c @@ -4,15 +4,32 @@ */ #include +#include +#include +#include "abi/gsc_command_header_abi.h" #include "intel_hdcp_gsc.h" -#include "xe_device_types.h" +#include "intel_hdcp_gsc_message.h" +#include "xe_bo.h" #include "xe_device.h" -#include "xe_gt.h" +#include "xe_device_types.h" #include "xe_gsc_proxy.h" +#include "xe_gsc_submit.h" +#include "xe_gt.h" +#include "xe_map.h" #include "xe_pm.h" #include "xe_uc_fw.h" +#define HECI_MEADDRESS_HDCP 18 + +struct intel_hdcp_gsc_message { + struct xe_bo *hdcp_bo; + u64 hdcp_cmd_in; + u64 hdcp_cmd_out; +}; + +#define HDCP_GSC_HEADER_SIZE sizeof(struct intel_gsc_mtl_header) + bool intel_hdcp_gsc_cs_required(struct xe_device *xe) { return true; @@ -44,19 +61,194 @@ bool intel_hdcp_gsc_check_status(struct xe_device *xe) return ret; } +/*This function helps allocate memory for the command that we will send to gsc cs */ +static int intel_hdcp_gsc_initialize_message(struct xe_device *xe, + struct intel_hdcp_gsc_message *hdcp_message) +{ + struct xe_bo *bo = NULL; + u64 cmd_in, cmd_out; + int ret = 0; + + /* allocate object of two page for HDCP command memory and store it */ + xe_device_mem_access_get(xe); + bo = xe_bo_create_pin_map(xe, xe_device_get_root_tile(xe), NULL, PAGE_SIZE * 2, + ttm_bo_type_kernel, + XE_BO_CREATE_SYSTEM_BIT | + XE_BO_CREATE_GGTT_BIT); + + if (IS_ERR(bo)) { + drm_err(&xe->drm, "Failed to allocate bo for HDCP streaming command!\n"); + ret = PTR_ERR(bo); + goto out; + } + + cmd_in = xe_bo_ggtt_addr(bo); + cmd_out = cmd_in + PAGE_SIZE; + xe_map_memset(xe, &bo->vmap, 0, 0, bo->size); + + hdcp_message->hdcp_bo = bo; + hdcp_message->hdcp_cmd_in = cmd_in; + hdcp_message->hdcp_cmd_out = cmd_out; +out: + xe_device_mem_access_put(xe); + return ret; +} + +static int intel_hdcp_gsc_hdcp2_init(struct xe_device *xe) +{ + struct intel_hdcp_gsc_message *hdcp_message; + int ret; + + hdcp_message = kzalloc(sizeof(*hdcp_message), GFP_KERNEL); + + if (!hdcp_message) + return -ENOMEM; + + /* + * NOTE: No need to lock the comp mutex here as it is already + * going to be taken before this function called + */ + ret = intel_hdcp_gsc_initialize_message(xe, hdcp_message); + if (ret) { + drm_err(&xe->drm, "Could not initialize hdcp_message\n"); + kfree(hdcp_message); + return ret; + } + + xe->display.hdcp.hdcp_message = hdcp_message; + return ret; +} + +static const struct i915_hdcp_ops gsc_hdcp_ops = { + .initiate_hdcp2_session = intel_hdcp_gsc_initiate_session, + .verify_receiver_cert_prepare_km = + intel_hdcp_gsc_verify_receiver_cert_prepare_km, + .verify_hprime = intel_hdcp_gsc_verify_hprime, + .store_pairing_info = intel_hdcp_gsc_store_pairing_info, + .initiate_locality_check = intel_hdcp_gsc_initiate_locality_check, + .verify_lprime = intel_hdcp_gsc_verify_lprime, + .get_session_key = intel_hdcp_gsc_get_session_key, + .repeater_check_flow_prepare_ack = + intel_hdcp_gsc_repeater_check_flow_prepare_ack, + .verify_mprime = intel_hdcp_gsc_verify_mprime, + .enable_hdcp_authentication = intel_hdcp_gsc_enable_authentication, + .close_hdcp_session = intel_hdcp_gsc_close_session, +}; + int intel_hdcp_gsc_init(struct xe_device *xe) { - drm_dbg_kms(&xe->drm, "HDCP support not yet implemented\n"); - return -ENODEV; + struct i915_hdcp_arbiter *data; + int ret; + + data = kzalloc(sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + mutex_lock(&xe->display.hdcp.hdcp_mutex); + xe->display.hdcp.arbiter = data; + xe->display.hdcp.arbiter->hdcp_dev = xe->drm.dev; + xe->display.hdcp.arbiter->ops = &gsc_hdcp_ops; + ret = intel_hdcp_gsc_hdcp2_init(xe); + if (ret) + kfree(data); + + mutex_unlock(&xe->display.hdcp.hdcp_mutex); + + return ret; } void intel_hdcp_gsc_fini(struct xe_device *xe) { + struct intel_hdcp_gsc_message *hdcp_message = + xe->display.hdcp.hdcp_message; + + if (!hdcp_message) + return; + + xe_bo_unpin_map_no_vm(hdcp_message->hdcp_bo); + kfree(hdcp_message); +} + +static int xe_gsc_send_sync(struct xe_device *xe, + struct intel_hdcp_gsc_message *hdcp_message, + u32 msg_size_in, u32 msg_size_out, + u32 addr_out_off) +{ + struct xe_gt *gt = hdcp_message->hdcp_bo->tile->media_gt; + struct iosys_map *map = &hdcp_message->hdcp_bo->vmap; + struct xe_gsc *gsc = >->uc.gsc; + int ret; + + ret = xe_gsc_pkt_submit_kernel(gsc, hdcp_message->hdcp_cmd_in, msg_size_in, + hdcp_message->hdcp_cmd_out, msg_size_out); + if (ret) { + drm_err(&xe->drm, "failed to send gsc HDCP msg (%d)\n", ret); + return ret; + } + + if (xe_gsc_check_and_update_pending(xe, map, 0, map, addr_out_off)) + return -EAGAIN; + + ret = xe_gsc_read_out_header(xe, map, addr_out_off, + sizeof(struct hdcp_cmd_header), NULL); + + return ret; } ssize_t intel_hdcp_gsc_msg_send(struct xe_device *xe, u8 *msg_in, size_t msg_in_len, u8 *msg_out, size_t msg_out_len) { - return -ENODEV; + const size_t max_msg_size = PAGE_SIZE - HDCP_GSC_HEADER_SIZE; + struct intel_hdcp_gsc_message *hdcp_message; + u64 host_session_id; + u32 msg_size_in, msg_size_out; + u32 addr_out_off, addr_in_wr_off = 0; + int ret, tries = 0; + + if (msg_in_len > max_msg_size || msg_out_len > max_msg_size) { + ret = -ENOSPC; + goto out; + } + + msg_size_in = msg_in_len + HDCP_GSC_HEADER_SIZE; + msg_size_out = msg_out_len + HDCP_GSC_HEADER_SIZE; + hdcp_message = xe->display.hdcp.hdcp_message; + addr_out_off = PAGE_SIZE; + + host_session_id = xe_gsc_create_host_session_id(); + xe_device_mem_access_get(xe); + addr_in_wr_off = xe_gsc_emit_header(xe, &hdcp_message->hdcp_bo->vmap, + addr_in_wr_off, HECI_MEADDRESS_HDCP, + host_session_id, msg_in_len); + xe_map_memcpy_to(xe, &hdcp_message->hdcp_bo->vmap, addr_in_wr_off, + msg_in, msg_in_len); + /* + * Keep sending request in case the pending bit is set no need to add + * message handle as we are using same address hence loc. of header is + * same and it will contain the message handle. we will send the message + * 20 times each message 50 ms apart + */ + do { + ret = xe_gsc_send_sync(xe, hdcp_message, msg_size_in, msg_size_out, + addr_out_off); + + /* Only try again if gsc says so */ + if (ret != -EAGAIN) + break; + + msleep(50); + + } while (++tries < 20); + + if (ret) + goto out; + + xe_map_memcpy_from(xe, msg_out, &hdcp_message->hdcp_bo->vmap, + addr_out_off + HDCP_GSC_HEADER_SIZE, + msg_out_len); + +out: + xe_device_mem_access_put(xe); + return ret; } diff --git a/drivers/gpu/drm/xe/xe_gsc_submit.c b/drivers/gpu/drm/xe/xe_gsc_submit.c index 348994b271be..9a18f5667db3 100644 --- a/drivers/gpu/drm/xe/xe_gsc_submit.c +++ b/drivers/gpu/drm/xe/xe_gsc_submit.c @@ -40,6 +40,21 @@ gsc_to_gt(struct xe_gsc *gsc) return container_of(gsc, struct xe_gt, uc.gsc); } +/** + * xe_gsc_get_host_session_id - Creates a random 64 bit host_session id with + * bits 56-63 masked. + * + * Returns: random host_session_id which can be used to send messages to gsc cs + */ +u64 xe_gsc_create_host_session_id(void) +{ + u64 host_session_id; + + get_random_bytes(&host_session_id, sizeof(u64)); + host_session_id &= ~HOST_SESSION_CLIENT_MASK; + return host_session_id; +} + /** * xe_gsc_emit_header - write the MTL GSC header in memory * @xe: the Xe device diff --git a/drivers/gpu/drm/xe/xe_gsc_submit.h b/drivers/gpu/drm/xe/xe_gsc_submit.h index 1939855031a6..1416b5745a4c 100644 --- a/drivers/gpu/drm/xe/xe_gsc_submit.h +++ b/drivers/gpu/drm/xe/xe_gsc_submit.h @@ -28,4 +28,5 @@ int xe_gsc_read_out_header(struct xe_device *xe, int xe_gsc_pkt_submit_kernel(struct xe_gsc *gsc, u64 addr_in, u32 size_in, u64 addr_out, u32 size_out); +u64 xe_gsc_create_host_session_id(void); #endif