From patchwork Tue Jul 28 13:46:20 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 501239 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id BFDCD140AF3 for ; Tue, 28 Jul 2015 23:50:58 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755331AbbG1Nuz (ORCPT ); Tue, 28 Jul 2015 09:50:55 -0400 Received: from foss.arm.com ([217.140.101.70]:59166 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932494AbbG1NrD (ORCPT ); Tue, 28 Jul 2015 09:47:03 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 6454B3F8; Tue, 28 Jul 2015 06:47:12 -0700 (PDT) Received: from approximate.cambridge.arm.com (approximate.cambridge.arm.com [10.1.209.148]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 1072F3F21A; Tue, 28 Jul 2015 06:47:00 -0700 (PDT) From: Marc Zyngier To: Bjorn Helgaas , Thomas Gleixner , Jiang Liu , Jason Cooper Cc: , , , Yijing Wang , Ma Jun , Lorenzo Pieralisi , Duc Dang , Hanjun Guo Subject: [PATCH v6 13/19] irqchip: gicv3-its: Get rid of struct msi_controller Date: Tue, 28 Jul 2015 14:46:20 +0100 Message-Id: <1438091186-10244-14-git-send-email-marc.zyngier@arm.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1438091186-10244-1-git-send-email-marc.zyngier@arm.com> References: <1438091186-10244-1-git-send-email-marc.zyngier@arm.com> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org The GICv3 ITS only uses the msi_controller structure as a way to match the host bridge with its MSI HW, and thus the msi_domain. But now that we can directly associate an msi_domain with a device, there is no use keeping this msi_controller around. Just remove all traces of msi_controller from the driver. Signed-off-by: Marc Zyngier --- drivers/irqchip/irq-gic-v3-its.c | 38 ++++++++++++++++---------------------- 1 file changed, 16 insertions(+), 22 deletions(-) diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index 760467d..ca8b1cc 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -54,13 +54,12 @@ struct its_collection { /* * The ITS structure - contains most of the infrastructure, with the - * msi_controller, the command queue, the collections, and the list of - * devices writing to it. + * top-level MSI domain, the command queue, the collections, and the + * list of devices writing to it. */ struct its_node { raw_spinlock_t lock; struct list_head entry; - struct msi_controller msi_chip; struct irq_domain *domain; void __iomem *base; unsigned long phys_base; @@ -776,7 +775,7 @@ static void its_free_tables(struct its_node *its) } } -static int its_alloc_tables(struct its_node *its) +static int its_alloc_tables(const char *node_name, struct its_node *its) { int err; int i; @@ -819,7 +818,7 @@ static int its_alloc_tables(struct its_node *its) if (order >= MAX_ORDER) { order = MAX_ORDER - 1; pr_warn("%s: Device Table too large, reduce its page order to %u\n", - its->msi_chip.of_node->full_name, order); + node_name, order); } } @@ -889,7 +888,7 @@ retry_baser: if (val != tmp) { pr_err("ITS: %s: GITS_BASER%d doesn't stick: %lx %lx\n", - its->msi_chip.of_node->full_name, i, + node_name, i, (unsigned long) val, (unsigned long) tmp); err = -ENXIO; goto out_free; @@ -1317,6 +1316,7 @@ static int its_probe(struct device_node *node, struct irq_domain *parent) struct resource res; struct its_node *its; void __iomem *its_base; + struct irq_domain *inner_domain = NULL; u32 val; u64 baser, tmp; int err; @@ -1360,7 +1360,6 @@ static int its_probe(struct device_node *node, struct irq_domain *parent) INIT_LIST_HEAD(&its->its_device_list); its->base = its_base; its->phys_base = res.start; - its->msi_chip.of_node = node; its->ite_size = ((readl_relaxed(its_base + GITS_TYPER) >> 4) & 0xf) + 1; its->cmd_base = kzalloc(ITS_CMD_QUEUE_SZ, GFP_KERNEL); @@ -1370,7 +1369,7 @@ static int its_probe(struct device_node *node, struct irq_domain *parent) } its->cmd_write = its->cmd_base; - err = its_alloc_tables(its); + err = its_alloc_tables(node->full_name, its); if (err) goto out_free_cmd; @@ -1406,26 +1405,21 @@ static int its_probe(struct device_node *node, struct irq_domain *parent) writeq_relaxed(0, its->base + GITS_CWRITER); writel_relaxed(GITS_CTLR_ENABLE, its->base + GITS_CTLR); - if (of_property_read_bool(its->msi_chip.of_node, "msi-controller")) { - its->domain = irq_domain_add_tree(node, &its_domain_ops, its); - if (!its->domain) { + if (of_property_read_bool(node, "msi-controller")) { + inner_domain = irq_domain_add_tree(node, &its_domain_ops, its); + if (!inner_domain) { err = -ENOMEM; goto out_free_tables; } - its->domain->parent = parent; - its->domain->bus_token = DOMAIN_BUS_NEXUS; + inner_domain->parent = parent; + inner_domain->bus_token = DOMAIN_BUS_NEXUS; - its->msi_chip.domain = its_pci_msi_alloc_domain(node, - its->domain); - if (!its->msi_chip.domain) { + its->domain = its_pci_msi_alloc_domain(node, inner_domain); + if (!its->domain) { err = -ENOMEM; goto out_free_domains; } - - err = of_pci_msi_chip_add(&its->msi_chip); - if (err) - goto out_free_domains; } spin_lock(&its_lock); @@ -1435,10 +1429,10 @@ static int its_probe(struct device_node *node, struct irq_domain *parent) return 0; out_free_domains: - if (its->msi_chip.domain) - irq_domain_remove(its->msi_chip.domain); if (its->domain) irq_domain_remove(its->domain); + if (inner_domain) + irq_domain_remove(inner_domain); out_free_tables: its_free_tables(its); out_free_cmd: