From nobody Tue Nov 26 17:44:46 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=reject dis=none) header.from=linux.vnet.ibm.com ARC-Seal: i=1; a=rsa-sha256; t=1706223060; cv=none; d=zohomail.com; s=zohoarc; b=gfIF7kmgDZ81A4evlvgy++4obuXDg/fkbNBH1OmpTR5Rt/4X9WuaweSltc+6++d0Wyz7hrOu1oM4H6UirUNx6Z9KwwxpttYEc9JNX9EuDMTVZoDI+/X8SfC/FyBaO+f3jSWkXMTi6l0Fj+LhggJpYvuzUnSy3spO6GoPR8w/s18= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1706223060; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=SnoNtwuQIjYxJG+y4ioaKFzxKY7CBD6sIjqAzOti7z8=; b=Adgk5nsqJw9+GhNscQc06v4QE4W/5cLNacjfIdJUeQcIY18PJ5kQc49505USCUY/gaj9+wZilE8kqT98q+FKOSEkj55GQOdgfems4yxXdmmunXvysq77OMQZ1cXOG46NEQ49GvawO9lsmzlaUBScNlnbKoFQeUblpSXfXRTLPL0= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=reject dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1706223060212984.5923374977401; Thu, 25 Jan 2024 14:51:00 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rT8XA-0007Cv-2G; Thu, 25 Jan 2024 17:49:20 -0500 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 1rT8X5-000799-Ip; Thu, 25 Jan 2024 17:49:15 -0500 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 1rT8X3-0000UP-DX; Thu, 25 Jan 2024 17:49:15 -0500 Received: from pps.filterd (m0353727.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 40PLVFaI013439; Thu, 25 Jan 2024 22:49:03 GMT Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3vuy2str5m-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 25 Jan 2024 22:49:03 +0000 Received: from m0353727.ppops.net (m0353727.ppops.net [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 40PMKGcX021327; Thu, 25 Jan 2024 22:49:02 GMT Received: from ppma21.wdc07v.mail.ibm.com (5b.69.3da9.ip4.static.sl-reverse.com [169.61.105.91]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3vuy2str5a-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 25 Jan 2024 22:49:02 +0000 Received: from pps.filterd (ppma21.wdc07v.mail.ibm.com [127.0.0.1]) by ppma21.wdc07v.mail.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 40PLkIoW025638; Thu, 25 Jan 2024 22:49:01 GMT Received: from smtprelay01.wdc07v.mail.ibm.com ([172.16.1.68]) by ppma21.wdc07v.mail.ibm.com (PPS) with ESMTPS id 3vrsgpf4m1-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 25 Jan 2024 22:49:01 +0000 Received: from smtpav01.dal12v.mail.ibm.com (smtpav01.dal12v.mail.ibm.com [10.241.53.100]) by smtprelay01.wdc07v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 40PMn0mk31588874 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 25 Jan 2024 22:49:00 GMT Received: from smtpav01.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 45A2358059; Thu, 25 Jan 2024 22:49:00 +0000 (GMT) Received: from smtpav01.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1BE2B58057; Thu, 25 Jan 2024 22:49:00 +0000 (GMT) Received: from mamboa4.aus.stglabs.ibm.com (unknown [9.3.84.87]) by smtpav01.dal12v.mail.ibm.com (Postfix) with ESMTP; Thu, 25 Jan 2024 22:49:00 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type : content-transfer-encoding; s=pp1; bh=SnoNtwuQIjYxJG+y4ioaKFzxKY7CBD6sIjqAzOti7z8=; b=M1gvhFOHIHo7E0EHM6E7wMub9loT1YVxNWFK4XJhdsEq16axMjXOiuNJS49eRrGKsG/w b/66rpqwe0u7ntxreBkOOnj24LWnKIKp7mbtOaY5enMQ/D2VjkQbBeW19wa5bs0YuOcS renpMB7IlsnBseft48GoB7B61S+hxdq+nQ8G536JhEQE5zs7F4G23pIo5nkLc+EKKfrL F03BNdKSGEqh6/36wrs/69iuTMcKbGbSBVMcLA5XszW32jx+2sxUXLhCFHaf9+AlKoyv HEuU3ITBnwDQvrhHO+kK5BLKaB3UpdcCZAimHOeOI+cgDBMrdeTsR2vojAWd/6V89xKc uQ== From: Glenn Miles To: qemu-devel@nongnu.org, qemu-ppc@nongnu.org Cc: Glenn Miles , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , Nicholas Piggin , =?UTF-8?q?Fr=C3=A9d=C3=A9ric=20Barrat?= , Reza Arbab Subject: [PATCH v7 5/9] ppc/pnv: Wire up pca9552 GPIO pins for PCIe hotplug power control Date: Thu, 25 Jan 2024 16:48:14 -0600 Message-Id: <20240125224818.146499-6-milesg@linux.vnet.ibm.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20240125224818.146499-1-milesg@linux.vnet.ibm.com> References: <20240125224818.146499-1-milesg@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-GUID: ImsQ2cTvUYJvxOGAbecWfNpujimY_-_T X-Proofpoint-ORIG-GUID: tL8QlzUXOZp2mGzkXWv5omkEUVP6Qr5O X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-01-25_14,2024-01-25_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 clxscore=1015 lowpriorityscore=0 priorityscore=1501 spamscore=0 mlxscore=0 mlxlogscore=999 suspectscore=0 phishscore=0 impostorscore=0 malwarescore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2401250164 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: none client-ip=148.163.156.1; envelope-from=milesg@linux.vnet.ibm.com; helo=mx0a-001b2d01.pphosted.com X-Spam_score_int: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_NONE=0.001, T_SCC_BODY_TEXT_LINE=-0.01 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @ibm.com) X-ZM-MESSAGEID: 1706223060793100009 For power10-rainier, a pca9552 device is used for PCIe slot hotplug power control by the Power Hypervisor code. The code expects that some time after it enables power to a PCIe slot by asserting one of the pca9552 GPIO pins 0-4, it should see a "power good" signal asserted on one of pca9552 GPIO pins 5-9. To simulate this behavior, we simply connect the GPIO outputs for pins 0-4 to the GPIO inputs for pins 5-9. Each PCIe slot is assigned 3 GPIO pins on the pca9552 device, for control of up to 5 PCIe slots. The per-slot signal names are: SLOTx_EN.......PHYP uses this as an output to enable slot power. We connect this to the SLOTx_PG pin to simulate a PGOOD signal. SLOTx_PG.......PHYP uses this as in input to detect PGOOD for the slot. For our purposes we just connect this to the SLOTx_EN output. SLOTx_Control..PHYP uses this as an output to prevent a race condition in the real hotplug circuitry, but we can ignore this output for simulation. Reviewed-by: C=C3=A9dric Le Goater Signed-off-by: Glenn Miles --- No changes from previous version hw/ppc/pnv.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/hw/ppc/pnv.c b/hw/ppc/pnv.c index d8d19fb065..42105211f5 100644 --- a/hw/ppc/pnv.c +++ b/hw/ppc/pnv.c @@ -1900,7 +1900,19 @@ static void pnv_rainier_i2c_init(PnvMachineState *pn= v) * Add a PCA9552 I2C device for PCIe hotplug control * to engine 2, bus 1, address 0x63 */ - i2c_slave_create_simple(chip10->i2c[2].busses[1], "pca9552", 0x63); + I2CSlave *dev =3D i2c_slave_create_simple(chip10->i2c[2].busses[1], + "pca9552", 0x63); + + /* + * Connect PCA9552 GPIO pins 0-4 (SLOTx_EN) outputs to GPIO pins 5= -9 + * (SLOTx_PG) inputs in order to fake the pgood state of PCIe slots + * after hypervisor code sets a SLOTx_EN pin high. + */ + qdev_connect_gpio_out(DEVICE(dev), 0, qdev_get_gpio_in(DEVICE(dev)= , 5)); + qdev_connect_gpio_out(DEVICE(dev), 1, qdev_get_gpio_in(DEVICE(dev)= , 6)); + qdev_connect_gpio_out(DEVICE(dev), 2, qdev_get_gpio_in(DEVICE(dev)= , 7)); + qdev_connect_gpio_out(DEVICE(dev), 3, qdev_get_gpio_in(DEVICE(dev)= , 8)); + qdev_connect_gpio_out(DEVICE(dev), 4, qdev_get_gpio_in(DEVICE(dev)= , 9)); } } =20 --=20 2.31.1