From patchwork Tue Mar 1 21:53:30 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ramalingam C X-Patchwork-Id: 12765185 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 AFBCCC433F5 for ; Tue, 1 Mar 2022 21:53:20 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id CBFA010E391; Tue, 1 Mar 2022 21:53:15 +0000 (UTC) Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by gabe.freedesktop.org (Postfix) with ESMTPS id 0D40C10E38B; Tue, 1 Mar 2022 21:53:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1646171594; x=1677707594; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=Mm176PIuzXWAZtxR6x0BC8QUH7PyO/xIkoCrEs+en9A=; b=IfyIFMxFwBgeYmKFuR4idbWt409E1MKT+jlLcxctde6LwxEMagpUfWRC hGlzvGWm6twqZJ7rSB7A4iT2tyGgjOUrjKo1We8mr3sYMOLvajPOw7pPX GQ954ixT3CJy+mb10Pe/p0UnsvPLvKTFGcxSBbyCBDmkucFzWjfME5NKA xSOcpLTpZpxH7CUBEbDpvuJ7bQFj9VkaXAPBLmRVnVWaARNmIOizmOMi4 MpOF8y6fVfHzSJq2KkyvhV7RTqlHkkZa5ZpmDm4nh/3jIBA341vxwNE8X AlvyvgSrwSZXRjlzgDH/PG5DYfvXoCFPA4rACVcjeZe882TQWuzTXVubr w==; X-IronPort-AV: E=McAfee;i="6200,9189,10273"; a="277922705" X-IronPort-AV: E=Sophos;i="5.90,146,1643702400"; d="scan'208";a="277922705" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Mar 2022 13:53:13 -0800 X-IronPort-AV: E=Sophos;i="5.90,146,1643702400"; d="scan'208";a="510704609" Received: from ramaling-i9x.iind.intel.com ([10.203.144.108]) by orsmga006-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Mar 2022 13:53:11 -0800 From: Ramalingam C To: intel-gfx , dri-devel Subject: [PATCH v2 0/4] drm/i915/ttm: Evict and store of compressed object Date: Wed, 2 Mar 2022 03:23:30 +0530 Message-Id: <20220301215334.20543-1-ramalingam.c@intel.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Hellstrom Thomas , Matthew Auld Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" On Xe-HP and later devices, we use dedicated compression control state (CCS) stored in local memory for each surface, to support the 3D and media compression formats. The memory required for the CCS of the entire local memory is 1/256 of the local memory size. So before the kernel boot, the required memory is reserved for the CCS data and a secure register will be programmed with the CCS base address So when we allocate a object in local memory we dont need to explicitly allocate the space for ccs data. But when we evict the obj into the smem to hold the compression related data along with the obj we need smem space of obj_size + (obj_size/256). Hence when we create smem for an obj with lmem placement possibility we create with the extra space. When we are swapping out the local memory obj on flat-ccs capable platform, we need to capture the ccs data too along with main meory and we need to restore it when we are swapping in the content. When lmem object is swapped into a smem obj, smem obj will have the extra pages required to hold the ccs data corresponding to the lmem main memory. So main memory of lmem will be copied into the initial pages of the smem and then ccs data corresponding to the main memory will be copied to the subsequent pages of smem. Swapin happens exactly in reverse order. First main memory of lmem is restored from the smem's initial pages and the ccs data will be restored from the subsequent pages of smem. Extracting and restoring the CCS data is done through a special cmd called XY_CTRL_SURF_COPY_BLT Test-with: 20220301212513.30772-1-ramalingam.c@intel.com Ayaz A Siddiqui (1): drm/i915/gt: Clear compress metadata for Xe_HP platforms Ramalingam C (3): drm/ttm: parameter to add extra pages into ttm_tt drm/i915/gem: Extra pages in ttm_tt for ccs data drm/i915/migrate: Evict and restore the flatccs capable lmem obj drivers/gpu/drm/drm_gem_vram_helper.c | 2 +- drivers/gpu/drm/i915/gem/i915_gem_ttm.c | 23 +- drivers/gpu/drm/i915/gt/intel_gpu_commands.h | 15 + drivers/gpu/drm/i915/gt/intel_migrate.c | 327 +++++++++++++++++-- drivers/gpu/drm/qxl/qxl_ttm.c | 2 +- drivers/gpu/drm/ttm/ttm_agp_backend.c | 2 +- drivers/gpu/drm/ttm/ttm_tt.c | 12 +- drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c | 2 +- include/drm/ttm/ttm_tt.h | 4 +- 9 files changed, 357 insertions(+), 32 deletions(-)