From patchwork Wed Jan 11 09:37:41 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cornelia Huck X-Patchwork-Id: 9509611 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id E11CB60231 for ; Wed, 11 Jan 2017 09:43:10 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DF666284ED for ; Wed, 11 Jan 2017 09:43:10 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D427628529; Wed, 11 Jan 2017 09:43:10 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 46FC327031 for ; Wed, 11 Jan 2017 09:43:10 +0000 (UTC) Received: from localhost ([::1]:52594 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cRFQz-0005TQ-4E for patchwork-qemu-devel@patchwork.kernel.org; Wed, 11 Jan 2017 04:43:09 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:45271) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cRFM9-0000my-L9 for qemu-devel@nongnu.org; Wed, 11 Jan 2017 04:38:10 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cRFM4-0000ru-OI for qemu-devel@nongnu.org; Wed, 11 Jan 2017 04:38:09 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:56982) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1cRFM4-0000rO-Eb for qemu-devel@nongnu.org; Wed, 11 Jan 2017 04:38:04 -0500 Received: from pps.filterd (m0098394.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.17/8.16.0.17) with SMTP id v0B9XgrL050080 for ; Wed, 11 Jan 2017 04:38:03 -0500 Received: from e06smtp06.uk.ibm.com (e06smtp06.uk.ibm.com [195.75.94.102]) by mx0a-001b2d01.pphosted.com with ESMTP id 27wfccfbe5-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Wed, 11 Jan 2017 04:38:03 -0500 Received: from localhost by e06smtp06.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Wed, 11 Jan 2017 09:37:58 -0000 Received: from b06cxnps4076.portsmouth.uk.ibm.com (d06relay13.portsmouth.uk.ibm.com [9.149.109.198]) by d06dlp02.portsmouth.uk.ibm.com (Postfix) with ESMTP id C56072190056; Wed, 11 Jan 2017 09:37:05 +0000 (GMT) Received: from d06av24.portsmouth.uk.ibm.com (d06av24.portsmouth.uk.ibm.com [9.149.105.60]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v0B9bwJT4063726; Wed, 11 Jan 2017 09:37:58 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0381E42041; Wed, 11 Jan 2017 08:35:54 +0000 (GMT) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id CA4CB4204C; Wed, 11 Jan 2017 08:35:53 +0000 (GMT) Received: from gondolin.boeblingen.de.ibm.com (unknown [9.152.224.55]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Wed, 11 Jan 2017 08:35:53 +0000 (GMT) From: Cornelia Huck To: qemu-devel@nongnu.org Date: Wed, 11 Jan 2017 10:37:41 +0100 X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170111093742.21946-1-cornelia.huck@de.ibm.com> References: <20170111093742.21946-1-cornelia.huck@de.ibm.com> X-TM-AS-GCONF: 00 X-Content-Scanned: Fidelis XPS MAILER x-cbid: 17011109-0024-0000-0000-000002832C7D X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17011109-0025-0000-0000-000021E73B6D Message-Id: <20170111093742.21946-11-cornelia.huck@de.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-01-11_08:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=3 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1612050000 definitions=main-1701110135 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] [fuzzy] X-Received-From: 148.163.156.1 Subject: [Qemu-devel] [PATCH 10/11] s390x/pci: handle PCIBridge bus number X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Cornelia Huck , borntraeger@de.ibm.com, jfrei@linux.vnet.ibm.com, Pierre Morel , agraf@suse.de Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Pierre Morel The PCI bus number is usually set by the host during the enumeration. In the s390 architecture we neither get a Device Tree nor have an enumeration understanding bridge devices. Let's fake the enumeration on reset and set the PCI_PRIMARY_BUS, PCI_SECONDARY_BUS and PCI_SUBORDINATE_BUS config entries for the bridges. Let's add the configuration of these three config entries on bridge hot plug. The bus number is calculated based on a new entry, bus_num of the S390pciState device. This commit is inspired by what spapr pci does. Signed-off-by: Pierre Morel Signed-off-by: Cornelia Huck --- hw/s390x/s390-pci-bus.c | 52 +++++++++++++++++++++++++++++++++++++++++++++++++ hw/s390x/s390-pci-bus.h | 1 + 2 files changed, 53 insertions(+) diff --git a/hw/s390x/s390-pci-bus.c b/hw/s390x/s390-pci-bus.c index 458ea2bdd7..736c0fcce5 100644 --- a/hw/s390x/s390-pci-bus.c +++ b/hw/s390x/s390-pci-bus.c @@ -576,6 +576,7 @@ static int s390_pcihost_init(SysBusDevice *dev) s->iommu_table = g_hash_table_new_full(g_int64_hash, g_int64_equal, NULL, g_free); s->zpci_table = g_hash_table_new_full(g_int_hash, g_int_equal, NULL, NULL); + s->bus_no = 0; QTAILQ_INIT(&s->pending_sei); QTAILQ_INIT(&s->zpci_devs); return 0; @@ -673,12 +674,24 @@ static void s390_pcihost_hot_plug(HotplugHandler *hotplug_dev, if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_BRIDGE)) { BusState *bus; PCIBridge *pb = PCI_BRIDGE(dev); + PCIDevice *pdev = PCI_DEVICE(dev); pci_bridge_map_irq(pb, dev->id, s390_pci_map_irq); pci_setup_iommu(&pb->sec_bus, s390_pci_dma_iommu, s); bus = BUS(&pb->sec_bus); qbus_set_hotplug_handler(bus, DEVICE(s), errp); + + if (dev->hotplugged) { + pci_default_write_config(pdev, PCI_PRIMARY_BUS, s->bus_no, 1); + s->bus_no += 1; + pci_default_write_config(pdev, PCI_SECONDARY_BUS, s->bus_no, 1); + do { + pdev = pdev->bus->parent_dev; + pci_default_write_config(pdev, PCI_SUBORDINATE_BUS, + s->bus_no, 1); + } while (pdev->bus && pci_bus_num(pdev->bus)); + } } else if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) { pdev = PCI_DEVICE(dev); @@ -812,6 +825,44 @@ out: object_unparent(OBJECT(pbdev)); } +static void s390_pci_enumerate_bridge(PCIBus *bus, PCIDevice *pdev, + void *opaque) +{ + S390pciState *s = opaque; + unsigned int primary = s->bus_no; + unsigned int subordinate = 0xff; + PCIBus *sec_bus = NULL; + + if ((pci_default_read_config(pdev, PCI_HEADER_TYPE, 1) != + PCI_HEADER_TYPE_BRIDGE)) { + return; + } + + (s->bus_no)++; + pci_default_write_config(pdev, PCI_PRIMARY_BUS, primary, 1); + pci_default_write_config(pdev, PCI_SECONDARY_BUS, s->bus_no, 1); + pci_default_write_config(pdev, PCI_SUBORDINATE_BUS, s->bus_no, 1); + + sec_bus = pci_bridge_get_sec_bus(PCI_BRIDGE(pdev)); + if (!sec_bus) { + return; + } + + pci_default_write_config(pdev, PCI_SUBORDINATE_BUS, subordinate, 1); + pci_for_each_device(sec_bus, pci_bus_num(sec_bus), + s390_pci_enumerate_bridge, s); + pci_default_write_config(pdev, PCI_SUBORDINATE_BUS, s->bus_no, 1); +} + +static void s390_pcihost_reset(DeviceState *dev) +{ + S390pciState *s = S390_PCI_HOST_BRIDGE(dev); + PCIBus *bus = s->parent_obj.bus; + + s->bus_no = 0; + pci_for_each_device(bus, pci_bus_num(bus), s390_pci_enumerate_bridge, s); +} + static void s390_pcihost_class_init(ObjectClass *klass, void *data) { SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); @@ -819,6 +870,7 @@ static void s390_pcihost_class_init(ObjectClass *klass, void *data) HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass); dc->cannot_instantiate_with_device_add_yet = true; + dc->reset = s390_pcihost_reset; k->init = s390_pcihost_init; hc->plug = s390_pcihost_hot_plug; hc->unplug = s390_pcihost_hot_unplug; diff --git a/hw/s390x/s390-pci-bus.h b/hw/s390x/s390-pci-bus.h index b82b18eb07..b0adefa788 100644 --- a/hw/s390x/s390-pci-bus.h +++ b/hw/s390x/s390-pci-bus.h @@ -310,6 +310,7 @@ typedef struct S390PCIBus { typedef struct S390pciState { PCIHostState parent_obj; uint32_t next_idx; + int bus_no; S390PCIBus *bus; GHashTable *iommu_table; GHashTable *zpci_table;