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: 13374218 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 94008C71153 for ; Mon, 4 Sep 2023 16:48:14 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qdCjq-0006hN-6f; Mon, 04 Sep 2023 12:47:46 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qdCjl-0006h4-Gt for qemu-devel@nongnu.org; Mon, 04 Sep 2023 12:47:41 -0400 Received: from frasgout.his.huawei.com ([185.176.79.56]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qdCjj-0007vP-C2 for qemu-devel@nongnu.org; Mon, 04 Sep 2023 12:47:41 -0400 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 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 Received-SPF: pass client-ip=185.176.79.56; envelope-from=jonathan.cameron@huawei.com; helo=frasgout.his.huawei.com X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-to: Jonathan Cameron X-Patchwork-Original-From: Jonathan Cameron via From: Jonathan Cameron Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.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) {