From patchwork Tue Feb 19 07:24:00 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?Smlhbmp1biBXYW5nICjnjovlu7rlhpsp?= X-Patchwork-Id: 1044513 X-Patchwork-Delegate: lorenzo.pieralisi@arm.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=mediatek.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 443XKs71qcz9s5c for ; Tue, 19 Feb 2019 18:24:17 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725801AbfBSHYQ (ORCPT ); Tue, 19 Feb 2019 02:24:16 -0500 Received: from mailgw02.mediatek.com ([210.61.82.184]:37638 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1725763AbfBSHYQ (ORCPT ); Tue, 19 Feb 2019 02:24:16 -0500 X-UUID: f36f122fcbc24c36bfaf674bf5e173e4-20190219 X-UUID: f36f122fcbc24c36bfaf674bf5e173e4-20190219 Received: from mtkcas06.mediatek.inc [(172.21.101.30)] by mailgw02.mediatek.com (envelope-from ) (mhqrelay.mediatek.com ESMTP with TLS) with ESMTP id 1907254790; Tue, 19 Feb 2019 15:24:04 +0800 Received: from mtkcas09.mediatek.inc (172.21.101.178) by mtkmbs08n1.mediatek.inc (172.21.101.55) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Tue, 19 Feb 2019 15:24:02 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkcas09.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Tue, 19 Feb 2019 15:24:02 +0800 From: Jianjun Wang To: , , , , CC: , , , , , , Subject: [v2] PCI: mediatek: Remove MSI inner domain Date: Tue, 19 Feb 2019 15:24:00 +0800 Message-ID: <1550561040-30892-1-git-send-email-jianjun.wang@mediatek.com> X-Mailer: git-send-email 1.7.9.5 MIME-Version: 1.0 X-MTK: N Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org There is no need to create the inner domain as a parent for MSI domian, some feature has been implemented by MSI framework. Remove the inner domain and its irq chip, it will be more closer to the hardware implementation. Signed-off-by: Jianjun Wang --- drivers/pci/controller/pcie-mediatek.c | 83 +++++++++++--------------- 1 file changed, 36 insertions(+), 47 deletions(-) diff --git a/drivers/pci/controller/pcie-mediatek.c b/drivers/pci/controller/pcie-mediatek.c index 8d05df56158b..cd55c8ae392e 100644 --- a/drivers/pci/controller/pcie-mediatek.c +++ b/drivers/pci/controller/pcie-mediatek.c @@ -169,7 +169,6 @@ struct mtk_pcie_soc { * @slot: port slot * @irq: GIC irq * @irq_domain: legacy INTx IRQ domain - * @inner_domain: inner IRQ domain * @msi_domain: MSI IRQ domain * @lock: protect the msi_irq_in_use bitmap * @msi_irq_in_use: bit map for assigned MSI IRQ @@ -190,7 +189,6 @@ struct mtk_pcie_port { u32 slot; int irq; struct irq_domain *irq_domain; - struct irq_domain *inner_domain; struct irq_domain *msi_domain; struct mutex lock; DECLARE_BITMAP(msi_irq_in_use, MTK_MSI_IRQS_NUM); @@ -420,20 +418,12 @@ static void mtk_msi_ack_irq(struct irq_data *data) writel(1 << hwirq, port->base + PCIE_IMSI_STATUS); } -static struct irq_chip mtk_msi_bottom_irq_chip = { - .name = "MTK MSI", - .irq_compose_msi_msg = mtk_compose_msi_msg, - .irq_set_affinity = mtk_msi_set_affinity, - .irq_ack = mtk_msi_ack_irq, -}; - -static int mtk_pcie_irq_domain_alloc(struct irq_domain *domain, unsigned int virq, - unsigned int nr_irqs, void *args) +static irq_hw_number_t mtk_pcie_msi_get_hwirq(struct msi_domain_info *info, + msi_alloc_info_t *arg) { - struct mtk_pcie_port *port = domain->host_data; - unsigned long bit; + struct mtk_pcie_port *port = info->chip_data; + irq_hw_number_t bit; - WARN_ON(nr_irqs != 1); mutex_lock(&port->lock); bit = find_first_zero_bit(port->msi_irq_in_use, MTK_MSI_IRQS_NUM); @@ -446,18 +436,14 @@ static int mtk_pcie_irq_domain_alloc(struct irq_domain *domain, unsigned int vir mutex_unlock(&port->lock); - irq_domain_set_info(domain, virq, bit, &mtk_msi_bottom_irq_chip, - domain->host_data, handle_edge_irq, - NULL, NULL); - - return 0; + return bit; } -static void mtk_pcie_irq_domain_free(struct irq_domain *domain, - unsigned int virq, unsigned int nr_irqs) +static void mtk_pcie_msi_free(struct irq_domain *domain, + struct msi_domain_info *info, unsigned int virq) { struct irq_data *d = irq_domain_get_irq_data(domain, virq); - struct mtk_pcie_port *port = irq_data_get_irq_chip_data(d); + struct mtk_pcie_port *port = info->chip_data; mutex_lock(&port->lock); @@ -468,46 +454,50 @@ static void mtk_pcie_irq_domain_free(struct irq_domain *domain, __clear_bit(d->hwirq, port->msi_irq_in_use); mutex_unlock(&port->lock); - - irq_domain_free_irqs_parent(domain, virq, nr_irqs); } -static const struct irq_domain_ops msi_domain_ops = { - .alloc = mtk_pcie_irq_domain_alloc, - .free = mtk_pcie_irq_domain_free, +static struct msi_domain_ops mtk_msi_domain_ops = { + .get_hwirq = mtk_pcie_msi_get_hwirq, + .msi_free = mtk_pcie_msi_free, }; static struct irq_chip mtk_msi_irq_chip = { - .name = "MTK PCIe MSI", - .irq_ack = irq_chip_ack_parent, - .irq_mask = pci_msi_mask_irq, - .irq_unmask = pci_msi_unmask_irq, + .name = "MTK PCIe", + .irq_compose_msi_msg = mtk_compose_msi_msg, + .irq_write_msi_msg = pci_msi_domain_write_msg, + .irq_set_affinity = mtk_msi_set_affinity, + .irq_ack = mtk_msi_ack_irq, + .irq_mask = pci_msi_mask_irq, + .irq_unmask = pci_msi_unmask_irq, }; static struct msi_domain_info mtk_msi_domain_info = { - .flags = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS | - MSI_FLAG_PCI_MSIX), - .chip = &mtk_msi_irq_chip, + .flags = (MSI_FLAG_USE_DEF_DOM_OPS | + MSI_FLAG_USE_DEF_CHIP_OPS | MSI_FLAG_PCI_MSIX), + .ops = &mtk_msi_domain_ops, + .chip = &mtk_msi_irq_chip, + .handler = handle_edge_irq, + .handler_name = "MSI", }; static int mtk_pcie_allocate_msi_domains(struct mtk_pcie_port *port) { - struct fwnode_handle *fwnode = of_node_to_fwnode(port->pcie->dev->of_node); + struct device *dev = port->pcie->dev; + struct fwnode_handle *fwnode = of_node_to_fwnode(dev->of_node); + struct msi_domain_info *info; mutex_init(&port->lock); - port->inner_domain = irq_domain_create_linear(fwnode, MTK_MSI_IRQS_NUM, - &msi_domain_ops, port); - if (!port->inner_domain) { - dev_err(port->pcie->dev, "failed to create IRQ domain\n"); + info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL); + if (!info) return -ENOMEM; - } - port->msi_domain = pci_msi_create_irq_domain(fwnode, &mtk_msi_domain_info, - port->inner_domain); + memcpy(info, &mtk_msi_domain_info, sizeof(*info)); + info->chip_data = port; + + port->msi_domain = pci_msi_create_irq_domain(fwnode, info, NULL); if (!port->msi_domain) { - dev_err(port->pcie->dev, "failed to create MSI domain\n"); - irq_domain_remove(port->inner_domain); + dev_err(dev, "failed to create MSI domain\n"); return -ENOMEM; } @@ -541,8 +531,6 @@ static void mtk_pcie_irq_teardown(struct mtk_pcie *pcie) if (IS_ENABLED(CONFIG_PCI_MSI)) { if (port->msi_domain) irq_domain_remove(port->msi_domain); - if (port->inner_domain) - irq_domain_remove(port->inner_domain); } irq_dispose_mapping(port->irq); @@ -619,7 +607,8 @@ static void mtk_pcie_intr_handler(struct irq_desc *desc) while ((imsi_status = readl(port->base + PCIE_IMSI_STATUS))) { for_each_set_bit(bit, &imsi_status, MTK_MSI_IRQS_NUM) { - virq = irq_find_mapping(port->inner_domain, bit); + virq = irq_find_mapping( + port->msi_domain, bit); generic_handle_irq(virq); } }