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 X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id F23E2C3A59E for ; Fri, 16 Aug 2019 17:31:54 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 735482086C for ; Fri, 16 Aug 2019 17:31:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=yadro.com header.i=@yadro.com header.b="sUgG7Hdn" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 735482086C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=yadro.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 4699Nl5bJyzDrRv for ; Sat, 17 Aug 2019 03:31:51 +1000 (AEST) 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="sUgG7Hdn"; 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 4698V24vWdzDqnf for ; Sat, 17 Aug 2019 02:51:22 +1000 (AEST) Received: from localhost (unknown [127.0.0.1]) by mta-01.yadro.com (Postfix) with ESMTP id 44ED142EE0; Fri, 16 Aug 2019 16:51:19 +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= 1565974278; x=1567788679; bh=mzzHmMxypSmyMD7JSc2YFxKV7OgmlBqwPAt HK9+W88E=; b=sUgG7HdnFlRNZMyAKd5GqmHabzzDIZW/fJxy9iDvjVyFSPNGOvI ke/5A4RSabLs60SZzDRp+NUGOr1w6y8jV24jx+p6CHteKLOGp4kylDexaTZHJ+nR wiuAyd+jKWMVgB9/PYQGySfvkt1i5z9f15W5ysnVrBDRMK/jL8tbRNJo= 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 70wtIAOWB8CI; Fri, 16 Aug 2019 19:51:18 +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 18B7042EDF; Fri, 16 Aug 2019 19:51:12 +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 19:51:11 +0300 From: Sergey Miroshnichenko To: , Subject: [PATCH v5 15/23] PCI: hotplug: movable BARs: Assign fixed and immovable BARs before others Date: Fri, 16 Aug 2019 19:50:53 +0300 Message-ID: <20190816165101.911-16-s.miroshnichenko@yadro.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190816165101.911-1-s.miroshnichenko@yadro.com> References: <20190816165101.911-1-s.miroshnichenko@yadro.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain 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) X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sergey Miroshnichenko , Bjorn Helgaas , linux@yadro.com Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Reassign resources during rescan in two steps: first the fixed/immovable BARs and bridge windows that have fixed areas, so the movable ones will not steal these reserved areas; then the rest - so the movable BARs will divide the rest of the space. With this change, pci_assign_resource() is now able to assign all types of BARs, so the pdev_assign_fixed_resources() became unused and thus removed. Signed-off-by: Sergey Miroshnichenko --- drivers/pci/pci.h | 2 ++ drivers/pci/setup-bus.c | 79 ++++++++++++++++++++++++----------------- drivers/pci/setup-res.c | 8 +++-- 3 files changed, 55 insertions(+), 34 deletions(-) diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index 12add575faf1..e1fcc46f9c40 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -260,6 +260,8 @@ void pci_disable_bridge_window(struct pci_dev *dev); bool pci_dev_movable_bars_supported(struct pci_dev *dev); +int assign_fixed_resource_on_bus(struct pci_bus *b, struct resource *r); + /* PCIe link information */ #define PCIE_SPEED2STR(speed) \ ((speed) == PCIE_SPEED_16_0GT ? "16 GT/s" : \ diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c index 6f12411357f3..c7b7e30c6284 100644 --- a/drivers/pci/setup-bus.c +++ b/drivers/pci/setup-bus.c @@ -38,6 +38,15 @@ struct pci_dev_resource { unsigned long flags; }; +enum assign_step { + assign_fixed_resources, + assign_float_resources, +}; + +static void _assign_requested_resources_sorted(struct list_head *head, + struct list_head *fail_head, + enum assign_step step); + static void free_list(struct list_head *head) { struct pci_dev_resource *dev_res, *tmp; @@ -278,19 +287,48 @@ static void reassign_resources_sorted(struct list_head *realloc_head, */ static void assign_requested_resources_sorted(struct list_head *head, struct list_head *fail_head) +{ + _assign_requested_resources_sorted(head, fail_head, assign_fixed_resources); + _assign_requested_resources_sorted(head, fail_head, assign_float_resources); +} + +static void _assign_requested_resources_sorted(struct list_head *head, + struct list_head *fail_head, + enum assign_step step) { struct resource *res; struct pci_dev_resource *dev_res; int idx; list_for_each_entry(dev_res, head, list) { + bool is_fixed = false; + if (!pci_dev_bars_enabled(dev_res->dev)) continue; res = dev_res->res; + if (!resource_size(res)) + continue; + idx = res - &dev_res->dev->resource[0]; - if (resource_size(res) && - pci_assign_resource(dev_res->dev, idx)) { + + if (idx < PCI_BRIDGE_RESOURCES) { + is_fixed = (res->flags & IORESOURCE_PCI_FIXED) || + !pci_dev_movable_bars_supported(dev_res->dev); + } else { + int b_res_idx = pci_get_bridge_resource_idx(res); + struct resource *fixed_res = + &dev_res->dev->subordinate->immovable_range[b_res_idx]; + + is_fixed = (fixed_res->start < fixed_res->end); + } + + if (assign_fixed_resources == step && !is_fixed) + continue; + else if (assign_float_resources == step && is_fixed) + continue; + + if (pci_assign_resource(dev_res->dev, idx)) { if (fail_head) { /* * If the failed resource is a ROM BAR and @@ -1336,7 +1374,7 @@ void pci_bus_size_bridges(struct pci_bus *bus) } EXPORT_SYMBOL(pci_bus_size_bridges); -static void assign_fixed_resource_on_bus(struct pci_bus *b, struct resource *r) +int assign_fixed_resource_on_bus(struct pci_bus *b, struct resource *r) { int i; struct resource *parent_r; @@ -1353,35 +1391,14 @@ static void assign_fixed_resource_on_bus(struct pci_bus *b, struct resource *r) !(r->flags & IORESOURCE_PREFETCH)) continue; - if (resource_contains(parent_r, r)) - request_resource(parent_r, r); - } -} - -/* - * Try to assign any resources marked as IORESOURCE_PCI_FIXED, as they are - * skipped by pbus_assign_resources_sorted(). - */ -static void pdev_assign_fixed_resources(struct pci_dev *dev) -{ - int i; - - for (i = 0; i < PCI_NUM_RESOURCES; i++) { - struct pci_bus *b; - struct resource *r = &dev->resource[i]; - - if (r->parent || !(r->flags & IORESOURCE_PCI_FIXED) || - !(r->flags & (IORESOURCE_IO | IORESOURCE_MEM))) - continue; - - b = dev->bus; - while (b && !r->parent) { - assign_fixed_resource_on_bus(b, r); - b = b->parent; - if (!r->parent && pci_movable_bars_enabled()) - break; + if (resource_contains(parent_r, r)) { + if (!request_resource(parent_r, r)) + return 0; } } + + dev_err(&b->dev, "failed to assign immovable %pR\n", r); + return -EBUSY; } void __pci_bus_assign_resources(const struct pci_bus *bus, @@ -1397,8 +1414,6 @@ void __pci_bus_assign_resources(const struct pci_bus *bus, if (!pci_dev_bars_enabled(dev)) continue; - pdev_assign_fixed_resources(dev); - b = dev->subordinate; if (!b) continue; diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c index 7357bcc12a53..02620cfac0c7 100644 --- a/drivers/pci/setup-res.c +++ b/drivers/pci/setup-res.c @@ -348,8 +348,12 @@ int pci_assign_resource(struct pci_dev *dev, int resno) resource_size_t align, size; int ret; - if (res->flags & IORESOURCE_PCI_FIXED) - return 0; + if ((res->flags & IORESOURCE_PCI_FIXED) || + (resno < PCI_BRIDGE_RESOURCES && + !pci_dev_movable_bars_supported(dev) && + res->start)) { + return assign_fixed_resource_on_bus(dev->bus, res); + } res->flags |= IORESOURCE_UNSET; align = pci_resource_alignment(dev, res); -- 2.21.0