From patchwork Mon Sep 4 16:47:03 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 13374216 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 04A16C83F2C for ; Mon, 4 Sep 2023 16:47:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240655AbjIDQrl (ORCPT ); Mon, 4 Sep 2023 12:47:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50048 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237790AbjIDQrl (ORCPT ); Mon, 4 Sep 2023 12:47:41 -0400 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1CB29199 for ; Mon, 4 Sep 2023 09:47:38 -0700 (PDT) Received: from lhrpeml500005.china.huawei.com (unknown [172.18.147.206]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4RfZK55Vgjz6D95m; Tue, 5 Sep 2023 00:46:17 +0800 (CST) Received: from SecurePC-101-06.china.huawei.com (10.122.247.231) by lhrpeml500005.china.huawei.com (7.191.163.240) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.31; Mon, 4 Sep 2023 17:47:35 +0100 From: Jonathan Cameron To: , Michael Tsirkin , Fan Ni , CC: Dave Jiang , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Subject: [PATCH 1/2] hw/cxl: Add utility functions decoder interleave ways and target count. Date: Mon, 4 Sep 2023 17:47:03 +0100 Message-ID: <20230904164704.18739-2-Jonathan.Cameron@huawei.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230904164704.18739-1-Jonathan.Cameron@huawei.com> References: <20230904164704.18739-1-Jonathan.Cameron@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.122.247.231] X-ClientProxiedBy: lhrpeml100005.china.huawei.com (7.191.160.25) To lhrpeml500005.china.huawei.com (7.191.163.240) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-cxl@vger.kernel.org As an encoded version of these key configuration parameters is a register, provide functions to extract it again so as to avoid the need for duplicating the storage. Signed-off-by: Jonathan Cameron Reviewed-by: Philippe Mathieu-Daudé --- include/hw/cxl/cxl_component.h | 14 ++++++++++++++ hw/cxl/cxl-component-utils.c | 17 +++++++++++++++++ 2 files changed, 31 insertions(+) diff --git a/include/hw/cxl/cxl_component.h b/include/hw/cxl/cxl_component.h index 42c7e581a7..f0ad9cf7de 100644 --- a/include/hw/cxl/cxl_component.h +++ b/include/hw/cxl/cxl_component.h @@ -238,7 +238,21 @@ static inline int cxl_decoder_count_enc(int count) return 0; } +static inline int cxl_decoder_count_dec(int enc_cnt) +{ + switch (enc_cnt) { + case 0: return 1; + case 1: return 2; + case 2: return 4; + case 3: return 6; + case 4: return 8; + case 5: return 10; + } + return 0; +} + uint8_t cxl_interleave_ways_enc(int iw, Error **errp); +int cxl_interleave_ways_dec(uint8_t iw_enc, Error **errp); uint8_t cxl_interleave_granularity_enc(uint64_t gran, Error **errp); static inline hwaddr cxl_decode_ig(int ig) diff --git a/hw/cxl/cxl-component-utils.c b/hw/cxl/cxl-component-utils.c index 378f1082ce..e96398e8af 100644 --- a/hw/cxl/cxl-component-utils.c +++ b/hw/cxl/cxl-component-utils.c @@ -392,6 +392,23 @@ uint8_t cxl_interleave_ways_enc(int iw, Error **errp) } } +int cxl_interleave_ways_dec(uint8_t iw_enc, Error **errp) +{ + switch (iw_enc) { + case 0x0: return 1; + case 0x1: return 2; + case 0x2: return 4; + case 0x3: return 8; + case 0x4: return 16; + case 0x8: return 3; + case 0x9: return 6; + case 0xa: return 12; + default: + error_setg(errp, "Encoded interleave ways: %d not supported", iw_enc); + return 0; + } +} + uint8_t cxl_interleave_granularity_enc(uint64_t gran, Error **errp) { switch (gran) {