From patchwork Fri Aug 16 14:17:12 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sergei Miroshnichenko X-Patchwork-Id: 1148253 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 46958S3mf2z9sN1 for ; Sat, 17 Aug 2019 00:20:56 +1000 (AEST) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=yadro.com Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=yadro.com header.i=@yadro.com header.b="Sjj+D4Y1"; dkim-atps=neutral Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 46958S2BsdzDrfb for ; Sat, 17 Aug 2019 00:20:56 +1000 (AEST) X-Original-To: skiboot@lists.ozlabs.org Delivered-To: skiboot@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=yadro.com (client-ip=89.207.88.252; helo=mta-01.yadro.com; envelope-from=s.miroshnichenko@yadro.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=yadro.com Authentication-Results: lists.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=yadro.com header.i=@yadro.com header.b="Sjj+D4Y1"; dkim-atps=neutral Received: from mta-01.yadro.com (mta-02.yadro.com [89.207.88.252]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 46954h2HVjzDrdY for ; Sat, 17 Aug 2019 00:17:40 +1000 (AEST) Received: from localhost (unknown [127.0.0.1]) by mta-01.yadro.com (Postfix) with ESMTP id 372DD404CB for ; Fri, 16 Aug 2019 14:17:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=yadro.com; h= content-type:content-type:content-transfer-encoding:mime-version :references:in-reply-to:x-mailer:message-id:date:date:subject :subject:from:from:received:received:received; s=mta-01; t= 1565965048; x=1567779449; bh=LaqZIwXKp1WpZ8/s77Kd/egJNZ/Vwr2LEo3 Lae67qro=; b=Sjj+D4Y11WD8LvBTt3S4hhMDHVeCYqYfcSxrtsIYoVFhsS3PL6t InswoUsY0q/Qp39FhYAJgDORAGDleRCpbrA8CAeWhh96CFeh0mjTybncqnA0TrUD ccGNNZJUKDEvG6d22Fy2e6C/8sf6CcgZ0ev/Bmer84yr6bsbzHtZdv/4= X-Virus-Scanned: amavisd-new at yadro.com Received: from mta-01.yadro.com ([127.0.0.1]) by localhost (mta-01.yadro.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id T1WxPJWNlSeO for ; Fri, 16 Aug 2019 17:17:28 +0300 (MSK) Received: from T-EXCH-02.corp.yadro.com (t-exch-02.corp.yadro.com [172.17.10.102]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by mta-01.yadro.com (Postfix) with ESMTPS id 234C342001 for ; Fri, 16 Aug 2019 17:17:27 +0300 (MSK) Received: from NB-148.yadro.com (172.17.15.60) by T-EXCH-02.corp.yadro.com (172.17.10.102) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.669.32; Fri, 16 Aug 2019 17:17:26 +0300 From: Sergey Miroshnichenko To: Date: Fri, 16 Aug 2019 17:17:12 +0300 Message-ID: <20190816141714.26380-4-s.miroshnichenko@yadro.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190816141714.26380-1-s.miroshnichenko@yadro.com> References: <20190816141714.26380-1-s.miroshnichenko@yadro.com> MIME-Version: 1.0 X-Originating-IP: [172.17.15.60] X-ClientProxiedBy: T-EXCH-01.corp.yadro.com (172.17.10.101) To T-EXCH-02.corp.yadro.com (172.17.10.102) Subject: [Skiboot] [PATCH v3 3/5] core/pci: Create the struct pci_device nodes automatically X-BeenThere: skiboot@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Mailing list for skiboot development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux@yadro.com Errors-To: skiboot-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Skiboot" Currently the struct pci_device nodes are created only during the bus rescan in skiboot (pci_scan_bus) initiated by an OS via OPAL. But these structures also could be created if reading the configuration space via OPAL reveals a new hotplugged device. This will allow using the standard platform-independent PCIe hotplug driver in Linux kernel ("pciehp") instead of requesting a Device Tree update. Signed-off-by: Sergey Miroshnichenko --- core/pci-opal.c | 23 +++++++++++++++++++---- 1 file changed, 19 insertions(+), 4 deletions(-) diff --git a/core/pci-opal.c b/core/pci-opal.c index 213a7256..72b9cee2 100644 --- a/core/pci-opal.c +++ b/core/pci-opal.c @@ -14,13 +14,21 @@ #include #include +static struct pci_device *pci_create_dn(struct phb *phb, uint16_t bdfn) +{ + struct pci_device *parent = pci_find_parent_dev(phb, bdfn); + + return pci_scan_one(phb, parent, bdfn); +} + #define OPAL_PCICFG_ACCESS_READ(op, cb, type) \ static int64_t opal_pci_config_##op(uint64_t phb_id, \ uint64_t bus_dev_func, \ - uint64_t offset, type data) \ + uint64_t offset, type *data) \ { \ struct phb *phb = pci_get_phb(phb_id); \ int64_t rc; \ + bool dev_found; \ \ if (!opal_addr_valid((void *)data)) \ return OPAL_PARAMETER; \ @@ -28,7 +36,14 @@ static int64_t opal_pci_config_##op(uint64_t phb_id, \ if (!phb) \ return OPAL_PARAMETER; \ phb_lock(phb); \ + \ + dev_found = pci_find_dev_safe(phb, bus_dev_func); \ + \ rc = phb->ops->cfg_##cb(phb, bus_dev_func, offset, data); \ + \ + if (!rc && !dev_found && *data != (type)0xffffffff) \ + pci_create_dn(phb, bus_dev_func); \ + \ phb_unlock(phb); \ \ return rc; \ @@ -51,9 +66,9 @@ static int64_t opal_pci_config_##op(uint64_t phb_id, \ return rc; \ } -OPAL_PCICFG_ACCESS_READ(read_byte, read8, uint8_t *) -OPAL_PCICFG_ACCESS_READ(read_half_word, read16, uint16_t *) -OPAL_PCICFG_ACCESS_READ(read_word, read32, uint32_t *) +OPAL_PCICFG_ACCESS_READ(read_byte, read8, uint8_t) +OPAL_PCICFG_ACCESS_READ(read_half_word, read16, uint16_t) +OPAL_PCICFG_ACCESS_READ(read_word, read32, uint32_t) OPAL_PCICFG_ACCESS_WRITE(write_byte, write8, uint8_t) OPAL_PCICFG_ACCESS_WRITE(write_half_word, write16, uint16_t) OPAL_PCICFG_ACCESS_WRITE(write_word, write32, uint32_t)