From mboxrd@z Thu Jan 1 00:00:00 1970 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 CFFA4C369D9 for ; Wed, 30 Apr 2025 18:50:59 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1uACVz-0003K2-0M; Wed, 30 Apr 2025 14:50:39 -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 1uACVv-0003JI-B9 for qemu-devel@nongnu.org; Wed, 30 Apr 2025 14:50:36 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1uACVt-0008GU-6m for qemu-devel@nongnu.org; Wed, 30 Apr 2025 14:50:34 -0400 Received: from pps.filterd (m0356517.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 53UGiboD005334; Wed, 30 Apr 2025 18:50:26 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc :content-transfer-encoding:date:from:in-reply-to:message-id :mime-version:references:subject:to; s=pp1; bh=+9L2H1IZRkGz1xbW/ DFz/pzJlm7+RkVaU/bQ98/CZaQ=; b=Subxq2/DhO7Y4281smAgehTXsl4Oc3/Td tUkxu9QbOFt2GNRAIYf1OvZmTxDq82bNERMKJbysB+eAvKWEsf6qvYANZ+69OHN7 f9lEXeJa9PBveoEOhB3x+zZa9kFb/LvK1vM3toqL9K92cDV60OkVDBxFcATsH+Mc eK2JMpN1Q1JPdhrClsHVLIl8thyVSJUgijVH71A2t2HngM6tijuw+kMtSmf41fnx P5Mbzx8E4SHm3AgRFXpddQUxxHUzp3D5DJ+Zx0acRP7yZnFyuJpsuJqJXv+rG4NI 8vdZMxkPhEXHFGjgwFa6SYXPjnKDeIoeOAtZ10C1QjZ170DxPRWHw== Received: from ppma23.wdc07v.mail.ibm.com (5d.69.3da9.ip4.static.sl-reverse.com [169.61.105.93]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 46b6vb4yw7-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 30 Apr 2025 18:50:26 +0000 (GMT) Received: from pps.filterd (ppma23.wdc07v.mail.ibm.com [127.0.0.1]) by ppma23.wdc07v.mail.ibm.com (8.18.1.2/8.18.1.2) with ESMTP id 53UHGIii001803; Wed, 30 Apr 2025 18:50:25 GMT Received: from smtprelay05.wdc07v.mail.ibm.com ([172.16.1.72]) by ppma23.wdc07v.mail.ibm.com (PPS) with ESMTPS id 469bams752-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 30 Apr 2025 18:50:25 +0000 Received: from smtpav01.wdc07v.mail.ibm.com (smtpav01.wdc07v.mail.ibm.com [10.39.53.228]) by smtprelay05.wdc07v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 53UIoNuW21103166 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 30 Apr 2025 18:50:23 GMT Received: from smtpav01.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B394B5804B; Wed, 30 Apr 2025 18:50:23 +0000 (GMT) Received: from smtpav01.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 265C458055; Wed, 30 Apr 2025 18:50:21 +0000 (GMT) Received: from IBM-D32RQW3.ibm.com (unknown [9.61.242.230]) by smtpav01.wdc07v.mail.ibm.com (Postfix) with ESMTP; Wed, 30 Apr 2025 18:50:20 +0000 (GMT) From: Farhan Ali To: qemu-devel@nongnu.org Cc: alex.williamson@redhat.com, stefanha@redhat.com, alifm@linux.ibm.com, mjrosato@linux.ibm.com, schnelle@linux.ibm.com, philmd@linaro.org, kwolf@redhat.com, hreitz@redhat.com, thuth@redhat.com, fam@euphon.net Subject: [PATCH v6 2/3] include: Add a header to define host PCI MMIO functions Date: Wed, 30 Apr 2025 11:50:11 -0700 Message-ID: <20250430185012.2303-3-alifm@linux.ibm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250430185012.2303-1-alifm@linux.ibm.com> References: <20250430185012.2303-1-alifm@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=BISzrEQG c=1 sm=1 tr=0 ts=681270f2 cx=c_pps a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17 a=XR8D0OoHHMoA:10 a=20KFwNOVAAAA:8 a=VnNF1IyMAAAA:8 a=0NFZlXjHx2QF6stEu-oA:9 X-Proofpoint-GUID: O4A4GdtlTqnKCNEoKtA1O-pF-hfcTBVH X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNDMwMDEzNiBTYWx0ZWRfX0kEhe11Cr1QI a5MnWwg4Lrnh9ABZZc3if5W7fZBY3xaZfAt/O3QTngwJNlEf8ISRkf+xX/DF56DDSzAXryYzQgF q0bBtky9kBWz6LXCAzrV98IfqtAV8XVx9SbUfzN2fHyVm89sIxaNj+29Vq6giKoVZfF/zCr65Nd QixA+ZBGmGV7aC4p3JAeqwswJcXYPRc1cgZRXV+j0DNqP9H9u18ADyeWFK9kMzx9/ldxn0JkWRx OsjI+VzF7gbcmr46RFXmJwVor0Uedii+Ng+EP0MQcbgklmhTwKO5uU1Vi+5pG9a0X4uLZP2rZZa +MoA2EjzbsAa/5LRSGdn1Wi+U8EoCCOaeTQyV1A7+9/HQUv4V0tQUkmAGV+uHBnRt+lV8M9ivOe NiPVG1/wxVBIF9Ji8QSpTGlv5x4nBSHsmkw3SloYWJmjRM92OpFpRMSjlLPCs0BU9ISb7ZfF X-Proofpoint-ORIG-GUID: O4A4GdtlTqnKCNEoKtA1O-pF-hfcTBVH X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.0.736,FMLib:17.12.80.40 definitions=2025-04-30_05,2025-04-24_02,2025-02-21_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 adultscore=0 priorityscore=1501 spamscore=0 lowpriorityscore=0 mlxlogscore=962 mlxscore=0 phishscore=0 bulkscore=0 impostorscore=0 clxscore=1015 malwarescore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2504070000 definitions=main-2504300136 Received-SPF: pass client-ip=148.163.156.1; envelope-from=alifm@linux.ibm.com; helo=mx0a-001b2d01.pphosted.com X-Spam_score_int: -26 X-Spam_score: -2.7 X-Spam_bar: -- X-Spam_report: (-2.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=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: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Add a generic API for host PCI MMIO reads/writes (e.g. Linux VFIO BAR accesses). The functions access little endian memory and returns the result in host cpu endianness. Reviewed-by: Stefan Hajnoczi Signed-off-by: Farhan Ali --- include/qemu/host-pci-mmio.h | 136 +++++++++++++++++++++++++++++++++++ 1 file changed, 136 insertions(+) create mode 100644 include/qemu/host-pci-mmio.h diff --git a/include/qemu/host-pci-mmio.h b/include/qemu/host-pci-mmio.h new file mode 100644 index 0000000000..8ae3f3af5d --- /dev/null +++ b/include/qemu/host-pci-mmio.h @@ -0,0 +1,136 @@ +/* + * API for host PCI MMIO accesses (e.g. Linux VFIO BARs) + * + * Copyright 2025 IBM Corp. + * Author(s): Farhan Ali + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#ifndef HOST_PCI_MMIO_H +#define HOST_PCI_MMIO_H + +#include "qemu/bswap.h" +#include "qemu/s390x_pci_mmio.h" + +static inline uint8_t host_pci_ldub_p(const void *ioaddr) +{ + uint8_t ret = 0; +#ifdef __s390x__ + ret = s390x_pci_mmio_read_8(ioaddr); +#else + ret = ldub_p(ioaddr); +#endif + + return ret; +} + +static inline uint16_t host_pci_lduw_le_p(const void *ioaddr) +{ + uint16_t ret = 0; +#ifdef __s390x__ + ret = le16_to_cpu(s390x_pci_mmio_read_16(ioaddr)); +#else + ret = lduw_le_p(ioaddr); +#endif + + return ret; +} + +static inline uint32_t host_pci_ldl_le_p(const void *ioaddr) +{ + uint32_t ret = 0; +#ifdef __s390x__ + ret = le32_to_cpu(s390x_pci_mmio_read_32(ioaddr)); +#else + ret = ldl_le_p(ioaddr); +#endif + + return ret; +} + +static inline uint64_t host_pci_ldq_le_p(const void *ioaddr) +{ + uint64_t ret = 0; +#ifdef __s390x__ + ret = le64_to_cpu(s390x_pci_mmio_read_64(ioaddr)); +#else + ret = ldq_le_p(ioaddr); +#endif + + return ret; +} + +static inline void host_pci_stb_le_p(void *ioaddr, uint8_t val) +{ +#ifdef __s390x__ + s390x_pci_mmio_write_8(ioaddr, val); +#else + stb_p(ioaddr, val); +#endif +} + +static inline void host_pci_stw_le_p(void *ioaddr, uint16_t val) +{ +#ifdef __s390x__ + s390x_pci_mmio_write_16(ioaddr, cpu_to_le16(val)); +#else + stw_le_p(ioaddr, val); +#endif +} + +static inline void host_pci_stl_le_p(void *ioaddr, uint32_t val) +{ +#ifdef __s390x__ + s390x_pci_mmio_write_32(ioaddr, cpu_to_le32(val)); +#else + stl_le_p(ioaddr, val); +#endif +} + +static inline void host_pci_stq_le_p(void *ioaddr, uint64_t val) +{ +#ifdef __s390x__ + s390x_pci_mmio_write_64(ioaddr, cpu_to_le64(val)); +#else + stq_le_p(ioaddr, val); +#endif +} + +static inline uint64_t host_pci_ldn_le_p(const void *ioaddr, int sz) +{ + switch (sz) { + case 1: + return host_pci_ldub_p(ioaddr); + case 2: + return host_pci_lduw_le_p(ioaddr); + case 4: + return host_pci_ldl_le_p(ioaddr); + case 8: + return host_pci_ldq_le_p(ioaddr); + default: + g_assert_not_reached(); + } +} + +static inline void host_pci_stn_le_p(void *ioaddr, int sz, uint64_t v) +{ + switch (sz) { + case 1: + host_pci_stb_le_p(ioaddr, v); + break; + case 2: + host_pci_stw_le_p(ioaddr, v); + break; + case 4: + host_pci_stl_le_p(ioaddr, v); + break; + case 8: + host_pci_stq_le_p(ioaddr, v); + break; + default: + g_assert_not_reached(); + } +} + +#endif -- 2.43.0