From patchwork Fri May 20 06:41:37 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gavin Shan X-Patchwork-Id: 9128657 X-Patchwork-Delegate: bhelgaas@google.com 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 7D16C60762 for ; Fri, 20 May 2016 06:43:18 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6F4C826E82 for ; Fri, 20 May 2016 06:43:18 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6435C271B5; Fri, 20 May 2016 06:43:18 +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 vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 671C326E82 for ; Fri, 20 May 2016 06:43:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754974AbcETGnQ (ORCPT ); Fri, 20 May 2016 02:43:16 -0400 Received: from e23smtp08.au.ibm.com ([202.81.31.141]:42746 "EHLO e23smtp08.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754873AbcETGnN (ORCPT ); Fri, 20 May 2016 02:43:13 -0400 Received: from localhost by e23smtp08.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Fri, 20 May 2016 16:43:08 +1000 X-IBM-Helo: d23dlp03.au.ibm.com X-IBM-MailFrom: gwshan@linux.vnet.ibm.com X-IBM-RcptTo: linux-pci@vger.kernel.org Received: from d23relay07.au.ibm.com (d23relay07.au.ibm.com [9.190.26.37]) by d23dlp03.au.ibm.com (Postfix) with ESMTP id C4D833578067 for ; Fri, 20 May 2016 16:43:07 +1000 (EST) Received: from d23av04.au.ibm.com (d23av04.au.ibm.com [9.190.235.139]) by d23relay07.au.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u4K6gxp910879158 for ; Fri, 20 May 2016 16:43:07 +1000 Received: from d23av04.au.ibm.com (localhost [127.0.0.1]) by d23av04.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id u4K6gXVl031394 for ; Fri, 20 May 2016 16:42:34 +1000 Received: from ozlabs.au.ibm.com (ozlabs.au.ibm.com [9.192.253.14]) by d23av04.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id u4K6gWGQ030588; Fri, 20 May 2016 16:42:33 +1000 Received: from bran.ozlabs.ibm.com (haven.au.ibm.com [9.192.254.114]) by ozlabs.au.ibm.com (Postfix) with ESMTP id B2AFFA03B5; Fri, 20 May 2016 16:41:46 +1000 (AEST) Received: from gwshan (shangw.ozlabs.ibm.com [10.61.2.199]) by bran.ozlabs.ibm.com (Postfix) with ESMTP id B3EDFE3A8C; Fri, 20 May 2016 16:41:46 +1000 (AEST) Received: by gwshan (Postfix, from userid 1000) id 91ACE942543; Fri, 20 May 2016 16:41:46 +1000 (AEST) From: Gavin Shan To: linuxppc-dev@lists.ozlabs.org Cc: linux-pci@vger.kernel.org, benh@kernel.crashing.org, mpe@ellerman.id.au, alistair@popple.id.au, aik@ozlabs.ru, Gavin Shan Subject: [PATCH v10 13/18] powerpc/pci: Delay populating pdn Date: Fri, 20 May 2016 16:41:37 +1000 Message-Id: <1463726502-14679-14-git-send-email-gwshan@linux.vnet.ibm.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1463726502-14679-1-git-send-email-gwshan@linux.vnet.ibm.com> References: <1463726502-14679-1-git-send-email-gwshan@linux.vnet.ibm.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16052006-0029-0000-0000-000045C46AFA X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The pdn (struct pci_dn) instances are allocated from memblock or bootmem when creating PCI controller (hoses) in setup_arch(). PCI hotplug, which will be supported by proceeding patches, releases PCI device nodes and their corresponding pdn on unplugging event. The memory chunks for pdn instances allocated from memblock or bootmem are hard to reused after being released. This delays creating pdn by pci_devs_phb_init() from setup_arch() to core_initcall() so that they are allocated from slab. The memory consumed by pdn can be released to system without problem during PCI unplugging time. It indicates that pci_dn is unavailable in setup_arch() and the the fixup on pdn (like AGP's) can't be carried out that time. We have to do that in pcibios_root_bridge_prepare() on maple/pasemi/powermac platforms where/when the pdn is available. pcibios_root_bridge_prepare is called from subsys_initcall() which is executed after core_initcall() so the code flow does not change. At the mean while, the EEH device is created when pdn is populated, meaning pdn and EEH device have same life cycle. In turn, we needn't call eeh_dev_init() to create EEH device explicitly. Signed-off-by: Gavin Shan Reviewed-by: Alexey Kardashevskiy --- arch/powerpc/include/asm/eeh.h | 2 +- arch/powerpc/include/asm/ppc-pci.h | 2 -- arch/powerpc/kernel/eeh_dev.c | 17 +++------------ arch/powerpc/kernel/pci_dn.c | 23 ++++++++++++++++---- arch/powerpc/platforms/maple/pci.c | 34 ++++++++++++++++++------------ arch/powerpc/platforms/pasemi/pci.c | 3 --- arch/powerpc/platforms/powermac/pci.c | 38 +++++++++++++++++++++------------- arch/powerpc/platforms/powernv/pci.c | 3 --- arch/powerpc/platforms/pseries/setup.c | 6 +----- 9 files changed, 69 insertions(+), 59 deletions(-) diff --git a/arch/powerpc/include/asm/eeh.h b/arch/powerpc/include/asm/eeh.h index fb9f376..8721580 100644 --- a/arch/powerpc/include/asm/eeh.h +++ b/arch/powerpc/include/asm/eeh.h @@ -274,7 +274,7 @@ void eeh_pe_restore_bars(struct eeh_pe *pe); const char *eeh_pe_loc_get(struct eeh_pe *pe); struct pci_bus *eeh_pe_bus_get(struct eeh_pe *pe); -void *eeh_dev_init(struct pci_dn *pdn, void *data); +struct eeh_dev *eeh_dev_init(struct pci_dn *pdn); void eeh_dev_phb_init_dynamic(struct pci_controller *phb); int eeh_init(void); int __init eeh_ops_register(struct eeh_ops *ops); diff --git a/arch/powerpc/include/asm/ppc-pci.h b/arch/powerpc/include/asm/ppc-pci.h index 8753e4e..0f73de0 100644 --- a/arch/powerpc/include/asm/ppc-pci.h +++ b/arch/powerpc/include/asm/ppc-pci.h @@ -39,8 +39,6 @@ void *pci_traverse_device_nodes(struct device_node *start, void *traverse_pci_dn(struct pci_dn *root, void *(*fn)(struct pci_dn *, void *), void *data); - -extern void pci_devs_phb_init(void); extern void pci_devs_phb_init_dynamic(struct pci_controller *phb); /* From rtas_pci.h */ diff --git a/arch/powerpc/kernel/eeh_dev.c b/arch/powerpc/kernel/eeh_dev.c index 7815095..d6b2ca7 100644 --- a/arch/powerpc/kernel/eeh_dev.c +++ b/arch/powerpc/kernel/eeh_dev.c @@ -44,14 +44,13 @@ /** * eeh_dev_init - Create EEH device according to OF node * @pdn: PCI device node - * @data: PHB * * It will create EEH device according to the given OF node. The function * might be called by PCI emunation, DR, PHB hotplug. */ -void *eeh_dev_init(struct pci_dn *pdn, void *data) +struct eeh_dev *eeh_dev_init(struct pci_dn *pdn) { - struct pci_controller *phb = data; + struct pci_controller *phb = pdn->phb; struct eeh_dev *edev; /* Allocate EEH device */ @@ -69,7 +68,7 @@ void *eeh_dev_init(struct pci_dn *pdn, void *data) INIT_LIST_HEAD(&edev->list); INIT_LIST_HEAD(&edev->rmv_list); - return NULL; + return edev; } /** @@ -81,16 +80,8 @@ void *eeh_dev_init(struct pci_dn *pdn, void *data) */ void eeh_dev_phb_init_dynamic(struct pci_controller *phb) { - struct pci_dn *root = phb->pci_data; - /* EEH PE for PHB */ eeh_phb_pe_create(phb); - - /* EEH device for PHB */ - eeh_dev_init(root, phb); - - /* EEH devices for children OF nodes */ - traverse_pci_dn(root, eeh_dev_init, phb); } /** @@ -106,8 +97,6 @@ static int __init eeh_dev_phb_init(void) list_for_each_entry_safe(phb, tmp, &hose_list, list_node) eeh_dev_phb_init_dynamic(phb); - pr_info("EEH: devices created\n"); - return 0; } diff --git a/arch/powerpc/kernel/pci_dn.c b/arch/powerpc/kernel/pci_dn.c index ecdccce..9cbf95a 100644 --- a/arch/powerpc/kernel/pci_dn.c +++ b/arch/powerpc/kernel/pci_dn.c @@ -209,8 +209,7 @@ struct pci_dn *add_dev_pci_data(struct pci_dev *pdev) } /* Create the EEH device for the VF */ - eeh_dev_init(pdn, pci_bus_to_host(pdev->bus)); - edev = pdn_to_eeh_dev(pdn); + edev = eeh_dev_init(pdn); BUG_ON(!edev); edev->physfn = pdev; } @@ -289,8 +288,11 @@ struct pci_dn *pci_add_device_node_info(struct pci_controller *hose, const __be32 *regs; struct device_node *parent; struct pci_dn *pdn; +#ifdef CONFIG_EEH + struct eeh_dev *edev; +#endif - pdn = zalloc_maybe_bootmem(sizeof(*pdn), GFP_KERNEL); + pdn = kzalloc(sizeof(*pdn), GFP_KERNEL); if (pdn == NULL) return NULL; dn->data = pdn; @@ -319,6 +321,15 @@ struct pci_dn *pci_add_device_node_info(struct pci_controller *hose, /* Extended config space */ pdn->pci_ext_config_space = (type && of_read_number(type, 1) == 1); + /* Create EEH device */ +#ifdef CONFIG_EEH + edev = eeh_dev_init(pdn); + if (!edev) { + kfree(pdn); + return NULL; + } +#endif + /* Attach to parent node */ INIT_LIST_HEAD(&pdn->child_list); INIT_LIST_HEAD(&pdn->list); @@ -504,15 +515,19 @@ void pci_devs_phb_init_dynamic(struct pci_controller *phb) * pci device found underneath. This routine runs once, * early in the boot sequence. */ -void __init pci_devs_phb_init(void) +static int __init pci_devs_phb_init(void) { struct pci_controller *phb, *tmp; /* This must be done first so the device nodes have valid pci info! */ list_for_each_entry_safe(phb, tmp, &hose_list, list_node) pci_devs_phb_init_dynamic(phb); + + return 0; } +core_initcall(pci_devs_phb_init); + static void pci_dev_pdn_setup(struct pci_dev *pdev) { struct pci_dn *pdn; diff --git a/arch/powerpc/platforms/maple/pci.c b/arch/powerpc/platforms/maple/pci.c index a923230..a2f89e6 100644 --- a/arch/powerpc/platforms/maple/pci.c +++ b/arch/powerpc/platforms/maple/pci.c @@ -568,6 +568,26 @@ void maple_pci_irq_fixup(struct pci_dev *dev) DBG(" <- maple_pci_irq_fixup\n"); } +static int maple_pci_root_bridge_prepare(struct pci_host_bridge *bridge) +{ + struct pci_controller *hose = pci_bus_to_host(bridge->bus); + struct device_node *np, *child; + + if (hose != u3_agp) + return 0; + + /* Fixup the PCI<->OF mapping for U3 AGP due to bus renumbering. We + * assume there is no P2P bridge on the AGP bus, which should be a + * safe assumptions hopefully. + */ + np = hose->dn; + PCI_DN(np)->busno = 0xf0; + for_each_child_of_node(np, child) + PCI_DN(child)->busno = 0xf0; + + return 0; +} + void __init maple_pci_init(void) { struct device_node *np, *root; @@ -605,19 +625,7 @@ void __init maple_pci_init(void) if (ht && maple_add_bridge(ht) != 0) of_node_put(ht); - /* Setup the linkage between OF nodes and PHBs */ - pci_devs_phb_init(); - - /* Fixup the PCI<->OF mapping for U3 AGP due to bus renumbering. We - * assume there is no P2P bridge on the AGP bus, which should be a - * safe assumptions hopefully. - */ - if (u3_agp) { - struct device_node *np = u3_agp->dn; - PCI_DN(np)->busno = 0xf0; - for (np = np->child; np; np = np->sibling) - PCI_DN(np)->busno = 0xf0; - } + ppc_md.pcibios_root_bridge_prepare = maple_pci_root_bridge_prepare; /* Tell pci.c to not change any resource allocations. */ pci_add_flags(PCI_PROBE_ONLY); diff --git a/arch/powerpc/platforms/pasemi/pci.c b/arch/powerpc/platforms/pasemi/pci.c index f3a68a0..10c4e8f 100644 --- a/arch/powerpc/platforms/pasemi/pci.c +++ b/arch/powerpc/platforms/pasemi/pci.c @@ -229,9 +229,6 @@ void __init pas_pci_init(void) of_node_get(np); of_node_put(root); - - /* Setup the linkage between OF nodes and PHBs */ - pci_devs_phb_init(); } void __iomem *pasemi_pci_getcfgaddr(struct pci_dev *dev, int offset) diff --git a/arch/powerpc/platforms/powermac/pci.c b/arch/powerpc/platforms/powermac/pci.c index 59ab16f..6e06c3b 100644 --- a/arch/powerpc/platforms/powermac/pci.c +++ b/arch/powerpc/platforms/powermac/pci.c @@ -878,6 +878,29 @@ void pmac_pci_irq_fixup(struct pci_dev *dev) #endif /* CONFIG_PPC32 */ } +#ifdef CONFIG_PPC64 +static int pmac_pci_root_bridge_prepare(struct pci_host_bridge *bridge) +{ + struct pci_controller *hose = pci_bus_to_host(bridge->bus); + struct device_node *np, *child; + + if (hose != u3_agp) + return 0; + + /* Fixup the PCI<->OF mapping for U3 AGP due to bus renumbering. We + * assume there is no P2P bridge on the AGP bus, which should be a + * safe assumptions for now. We should do something better in the + * future though + */ + np = hose->dn; + PCI_DN(np)->busno = 0xf0; + for_each_child_of_node(np, child) + PCI_DN(child)->busno = 0xf0; + + return 0; +} +#endif /* CONFIG_PPC64 */ + void __init pmac_pci_init(void) { struct device_node *np, *root; @@ -914,20 +937,7 @@ void __init pmac_pci_init(void) if (ht && pmac_add_bridge(ht) != 0) of_node_put(ht); - /* Setup the linkage between OF nodes and PHBs */ - pci_devs_phb_init(); - - /* Fixup the PCI<->OF mapping for U3 AGP due to bus renumbering. We - * assume there is no P2P bridge on the AGP bus, which should be a - * safe assumptions for now. We should do something better in the - * future though - */ - if (u3_agp) { - struct device_node *np = u3_agp->dn; - PCI_DN(np)->busno = 0xf0; - for (np = np->child; np; np = np->sibling) - PCI_DN(np)->busno = 0xf0; - } + ppc_md.pcibios_root_bridge_prepare = pmac_pci_root_bridge_prepare; /* pmac_check_ht_link(); */ #else /* CONFIG_PPC64 */ diff --git a/arch/powerpc/platforms/powernv/pci.c b/arch/powerpc/platforms/powernv/pci.c index b1ee631..0f1b8bf 100644 --- a/arch/powerpc/platforms/powernv/pci.c +++ b/arch/powerpc/platforms/powernv/pci.c @@ -816,9 +816,6 @@ void __init pnv_pci_init(void) for_each_compatible_node(np, NULL, "ibm,ioda2-npu-phb") pnv_pci_init_npu_phb(np); - /* Setup the linkage between OF nodes and PHBs */ - pci_devs_phb_init(); - /* Configure IOMMU DMA hooks */ set_pci_dma_ops(&dma_iommu_ops); } diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c index 9883bc7..4eada28 100644 --- a/arch/powerpc/platforms/pseries/setup.c +++ b/arch/powerpc/platforms/pseries/setup.c @@ -265,11 +265,8 @@ static int pci_dn_reconfig_notifier(struct notifier_block *nb, unsigned long act case OF_RECONFIG_ATTACH_NODE: parent = of_get_parent(np); pdn = parent ? PCI_DN(parent) : NULL; - if (pdn) { - /* Create pdn and EEH device */ + if (pdn) pci_add_device_node_info(pdn->phb, np); - eeh_dev_init(PCI_DN(np), pdn->phb); - } of_node_put(parent); break; @@ -492,7 +489,6 @@ static void __init find_and_init_phbs(void) } of_node_put(root); - pci_devs_phb_init(); /* * PCI_PROBE_ONLY and PCI_REASSIGN_ALL_BUS can be set via properties