From patchwork Tue Feb 1 10:41:22 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ramalingam C X-Patchwork-Id: 12731524 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 5E783C4332F for ; Tue, 1 Feb 2022 10:42:18 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id DD6B710EBEF; Tue, 1 Feb 2022 10:42:00 +0000 (UTC) Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by gabe.freedesktop.org (Postfix) with ESMTPS id 372B910E8FB; Tue, 1 Feb 2022 10:41:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1643712119; x=1675248119; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=mDruTrmIzqrQfMmaFrIpn+cDbkb7x3Xf0FqTm9LNJnU=; b=WZviQmKht90nFIPrmKs2CzARxUGOnL+wu7/VyREDBLUOF+dVbHGdszq8 rfbOKVg3ieCYr8yWgURSNX6F3UgbR7ZlvKdcF80OczN2fxN2NRa3YAwkO p+1fuStFXli8FXFhXMhSw1GAooyVfzcISyDQZNA0D0kRAXVyZpa4RvwHl CrSwTO6pCanEkNyQ9+ZLX4fBnmcr7RFodoPbZ3epQ5fD0P8T4LE0UG+YV YGpzXBHzhdgMeoa9+bRqw/HktjmAlE5/HglX4VUc2BDJXjWHghI2EEY2p SpwXz9MoqA+QYo2bEZ/kDWr89N5XgfJ9xGyV69bryaISQILYYpEmOSyRv w==; X-IronPort-AV: E=McAfee;i="6200,9189,10244"; a="334020608" X-IronPort-AV: E=Sophos;i="5.88,333,1635231600"; d="scan'208";a="334020608" Received: from orsmga007.jf.intel.com ([10.7.209.58]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Feb 2022 02:41:58 -0800 X-IronPort-AV: E=Sophos;i="5.88,333,1635231600"; d="scan'208";a="523011217" Received: from ramaling-i9x.iind.intel.com ([10.203.144.108]) by orsmga007-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Feb 2022 02:41:54 -0800 From: Ramalingam C To: dri-devel , intel-gfx Date: Tue, 1 Feb 2022 16:11:22 +0530 Message-Id: <20220201104132.3050-10-ramalingam.c@intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20220201104132.3050-1-ramalingam.c@intel.com> References: <20220201104132.3050-1-ramalingam.c@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v5 09/19] Doc/gpu/rfc/i915: i915 DG2 64k pagesize uAPI 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: Daniel Vetter , Kenneth Graunke , Slawomir Milczarek , Pekka Paalanen , Matthew Auld , Simon Ser , mesa-dev@lists.freedesktop.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Details of the 64k pagesize support added as part of DG2 enabling and its implicit impact on the uAPI. v2: improvised the Flat-CCS documentation [Danvet & CQ] v3: made only for 64k pagesize support Signed-off-by: Ramalingam C cc: Daniel Vetter cc: Matthew Auld cc: Simon Ser cc: Pekka Paalanen Cc: Jordan Justen Cc: Kenneth Graunke Cc: mesa-dev@lists.freedesktop.org Cc: Tony Ye Cc: Slawomir Milczarek --- Documentation/gpu/rfc/i915_dg2.rst | 25 +++++++++++++++++++++++++ Documentation/gpu/rfc/index.rst | 3 +++ 2 files changed, 28 insertions(+) create mode 100644 Documentation/gpu/rfc/i915_dg2.rst diff --git a/Documentation/gpu/rfc/i915_dg2.rst b/Documentation/gpu/rfc/i915_dg2.rst new file mode 100644 index 000000000000..f4eb5a219897 --- /dev/null +++ b/Documentation/gpu/rfc/i915_dg2.rst @@ -0,0 +1,25 @@ +==================== +I915 DG2 RFC Section +==================== + +Upstream plan +============= +Plan to upstream the DG2 enabling is: + +* Merge basic HW enabling for DG2 (Still without pciid) +* Merge the 64k support for lmem +* Merge the flat CCS enabling patches +* Add the pciid for DG2 and enable the DG2 in CI + + +64K page support for lmem +========================= +On DG2 hw, local-memory supports minimum GTT page size of 64k only. 4k is not +supported anymore. + +DG2 hw doesn't support the 64k (lmem) and 4k (smem) pages in the same ppgtt +Page table. Refer the struct drm_i915_gem_create_ext for the implication of +handling the 64k page size. + +.. kernel-doc:: include/uapi/drm/i915_drm.h + :functions: drm_i915_gem_create_ext diff --git a/Documentation/gpu/rfc/index.rst b/Documentation/gpu/rfc/index.rst index 91e93a705230..afb320ed4028 100644 --- a/Documentation/gpu/rfc/index.rst +++ b/Documentation/gpu/rfc/index.rst @@ -20,6 +20,9 @@ host such documentation: i915_gem_lmem.rst +.. toctree:: + i915_dg2.rst + .. toctree:: i915_scheduler.rst