From patchwork Mon Aug 14 08:20:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Minda Chen X-Patchwork-Id: 13352553 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9C806C001DB for ; Mon, 14 Aug 2023 08:20:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=8zvYfmQV1kfy0AMjHtUyrB8f1ga2enNUJ7tLbD8jclE=; b=OENm+eH5N1jB0c MNaEMhSveF9fsX6oEGkRZ9f9vbiqIue6hPy9Jm9W6YJWRcvk3qp7H5imCGvPkHNEjHDn9taW0yDsk 0woimj86eqZAYBEQNCT84wwARUPJlynFww2D++Fueub+NUn5xUgW3aEv9DfV3vE8l6j+H9pC7IYXb fU1kizxKdr1lpT4B0zY/SZFM0Y7mkEG8UdpKI1yMRslCLmCgQkK5kRczjvMIlJSu6E/chpSa6urRA eTL5rIM+xBribwm6WHiGunQEsAThX7MWAw3UGtq3A+VT50xqzVNl4tzQwt0zHcds08P9TdiASfCF/ d4CwHmMAd6JTY7228+Eg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qVSoo-00GUw9-2M; Mon, 14 Aug 2023 08:20:54 +0000 Received: from fd01.gateway.ufhost.com ([61.152.239.71]) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qVSoc-00GUcj-33 for linux-riscv@lists.infradead.org; Mon, 14 Aug 2023 08:20:48 +0000 Received: from EXMBX165.cuchost.com (unknown [175.102.18.54]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "EXMBX165", Issuer "EXMBX165" (not verified)) by fd01.gateway.ufhost.com (Postfix) with ESMTP id BFB398246; Mon, 14 Aug 2023 16:20:26 +0800 (CST) Received: from EXMBX171.cuchost.com (172.16.6.91) by EXMBX165.cuchost.com (172.16.6.75) with Microsoft SMTP Server (TLS) id 15.0.1497.42; Mon, 14 Aug 2023 16:20:26 +0800 Received: from ubuntu.localdomain (183.27.98.20) by EXMBX171.cuchost.com (172.16.6.91) with Microsoft SMTP Server (TLS) id 15.0.1497.42; Mon, 14 Aug 2023 16:20:25 +0800 From: Minda Chen To: Daire McNamara , Conor Dooley , Rob Herring , Krzysztof Kozlowski , Bjorn Helgaas , Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy=C5=84?= =?utf-8?q?ski?= , Emil Renner Berthing CC: , , , , =?utf-8?q?P?= =?utf-8?q?ali_Roh=C3=A1r?= , Paul Walmsley , Palmer Dabbelt , Albert Ou , Philipp Zabel , Mason Huo , Leyfoon Tan , Kevin Xie , Minda Chen Subject: [PATCH v3 08/11] PCI: microchip: Move IRQ init functions to pcie-plda-host.c Date: Mon, 14 Aug 2023 16:20:13 +0800 Message-ID: <20230814082016.104181-9-minda.chen@starfivetech.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230814082016.104181-1-minda.chen@starfivetech.com> References: <20230814082016.104181-1-minda.chen@starfivetech.com> MIME-Version: 1.0 X-Originating-IP: [183.27.98.20] X-ClientProxiedBy: EXCAS062.cuchost.com (172.16.6.22) To EXMBX171.cuchost.com (172.16.6.91) X-YovoleRuleAgent: yovoleflag X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230814_012043_553623_6403C842 X-CRM114-Status: GOOD ( 25.30 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Move IRQ init functions to pcie-plda-host.c. mc_handle_event merge to plda_handle_event, Add get_events functions, PolarFire PCIe uses get_events function pointer to get their events num. Signed-off-by: Minda Chen --- .../pci/controller/plda/pcie-microchip-host.c | 125 +--------------- drivers/pci/controller/plda/pcie-plda-host.c | 140 ++++++++++++++++-- drivers/pci/controller/plda/pcie-plda.h | 15 +- 3 files changed, 139 insertions(+), 141 deletions(-) diff --git a/drivers/pci/controller/plda/pcie-microchip-host.c b/drivers/pci/controller/plda/pcie-microchip-host.c index 140e7ca1a5cb..e71e34afab2a 100644 --- a/drivers/pci/controller/plda/pcie-microchip-host.c +++ b/drivers/pci/controller/plda/pcie-microchip-host.c @@ -314,10 +314,6 @@ static void mc_pcie_enable_msi(struct mc_pcie *port, void __iomem *ecam) ecam + MC_MSI_CAP_CTRL_OFFSET + PCI_MSI_ADDRESS_HI); } -static const struct irq_domain_ops intx_domain_ops = { - .map = plda_pcie_intx_map, -}; - static inline u32 reg_to_event(u32 reg, struct event_map field) { return (reg & field.reg_mask) ? BIT(field.event_bit) : 0; @@ -404,23 +400,6 @@ static irqreturn_t mc_event_handler(int irq, void *dev_id) return IRQ_HANDLED; } -static void mc_handle_event(struct irq_desc *desc) -{ - struct plda_pcie_rp *port = irq_desc_get_handler_data(desc); - unsigned long events; - u32 bit; - struct irq_chip *chip = irq_desc_get_chip(desc); - - chained_irq_enter(chip, desc); - - events = get_events(port); - - for_each_set_bit(bit, &events, NUM_EVENTS) - generic_handle_domain_irq(port->event_domain, bit); - - chained_irq_exit(chip, desc); -} - static void mc_ack_event_irq(struct irq_data *data) { struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data); @@ -559,45 +538,6 @@ static int mc_pcie_init_clks(struct device *dev) return 0; } -static int plda_pcie_init_irq_domains(struct plda_pcie_rp *port, struct plda_evt *evt) -{ - struct device *dev = port->dev; - struct device_node *node = dev->of_node; - struct device_node *pcie_intc_node; - - /* Setup INTx */ - pcie_intc_node = of_get_next_child(node, NULL); - if (!pcie_intc_node) { - dev_err(dev, "failed to find PCIe Intc node\n"); - return -EINVAL; - } - - port->event_domain = irq_domain_add_linear(pcie_intc_node, port->num_events, - evt->domain_ops, port); - if (!port->event_domain) { - dev_err(dev, "failed to get event domain\n"); - of_node_put(pcie_intc_node); - return -ENOMEM; - } - - irq_domain_update_bus_token(port->event_domain, DOMAIN_BUS_NEXUS); - - port->intx_domain = irq_domain_add_linear(pcie_intc_node, PCI_NUM_INTX, - &intx_domain_ops, port); - if (!port->intx_domain) { - dev_err(dev, "failed to get an INTx IRQ domain\n"); - of_node_put(pcie_intc_node); - return -ENOMEM; - } - - irq_domain_update_bus_token(port->intx_domain, DOMAIN_BUS_WIRED); - - of_node_put(pcie_intc_node); - raw_spin_lock_init(&port->lock); - - return plda_allocate_msi_domains(port); -} - static inline void mc_clear_secs(struct mc_pcie *port) { void __iomem *ctrl_base_addr = port->axi_base_addr + MC_PCIE_CTRL_ADDR; @@ -658,66 +598,6 @@ static void mc_disable_interrupts(struct mc_pcie *port) writel_relaxed(GENMASK(31, 0), bridge_base_addr + ISTATUS_HOST); } -static int plda_init_interrupts(struct platform_device *pdev, - struct plda_pcie_rp *port, struct plda_evt *evt) -{ - struct device *dev = &pdev->dev; - int irq; - int i, intx_irq, msi_irq, event_irq; - int ret; - - ret = plda_pcie_init_irq_domains(port, evt); - if (ret) { - dev_err(dev, "failed creating IRQ domains\n"); - return ret; - } - - irq = platform_get_irq(pdev, 0); - if (irq < 0) - return -ENODEV; - - for (i = 0; i < port->num_events; i++) { - event_irq = irq_create_mapping(port->event_domain, i); - if (!event_irq) { - dev_err(dev, "failed to map hwirq %d\n", i); - return -ENXIO; - } - - if (evt->request_evt_irq) - ret = evt->request_evt_irq(port, event_irq, i); - else - ret = devm_request_irq(dev, event_irq, plda_event_handler, - 0, NULL, port); - if (ret) { - dev_err(dev, "failed to request IRQ %d\n", event_irq); - return ret; - } - } - - intx_irq = irq_create_mapping(port->event_domain, - evt->intx_evt); - if (!intx_irq) { - dev_err(dev, "failed to map INTx interrupt\n"); - return -ENXIO; - } - - /* Plug the INTx chained handler */ - irq_set_chained_handler_and_data(intx_irq, plda_handle_intx, port); - - msi_irq = irq_create_mapping(port->event_domain, - evt->msi_evt); - if (!msi_irq) - return -ENXIO; - - /* Plug the MSI chained handler */ - irq_set_chained_handler_and_data(msi_irq, plda_handle_msi, port); - - /* Plug the main event chained handler */ - irq_set_chained_handler_and_data(irq, mc_handle_event, port); - - return 0; -} - static int mc_request_evt_irq(struct plda_pcie_rp *plda, int event_irq, int evt) { @@ -725,6 +605,10 @@ static int mc_request_evt_irq(struct plda_pcie_rp *plda, int event_irq, 0, event_cause[evt].sym, plda); } +static const struct plda_pcie_ops plda_ops = { + .get_events = get_events, +}; + static int mc_platform_init(struct pci_config_window *cfg) { struct device *dev = cfg->parent; @@ -773,6 +657,7 @@ static int mc_host_probe(struct platform_device *pdev) plda = &port->plda; plda->dev = dev; plda->num_events = NUM_EVENTS; + plda->ops = &plda_ops; port->axi_base_addr = devm_platform_ioremap_resource(pdev, 1); if (IS_ERR(port->axi_base_addr)) diff --git a/drivers/pci/controller/plda/pcie-plda-host.c b/drivers/pci/controller/plda/pcie-plda-host.c index bf63f220a518..73a7c10d379d 100644 --- a/drivers/pci/controller/plda/pcie-plda-host.c +++ b/drivers/pci/controller/plda/pcie-plda-host.c @@ -20,7 +20,7 @@ #include "pcie-plda.h" -void plda_handle_msi(struct irq_desc *desc) +static void plda_handle_msi(struct irq_desc *desc) { struct plda_pcie_rp *port = irq_desc_get_handler_data(desc); struct irq_chip *chip = irq_desc_get_chip(desc); @@ -83,7 +83,7 @@ static struct irq_chip plda_msi_bottom_irq_chip = { .irq_set_affinity = plda_msi_set_affinity, }; -int plda_irq_msi_domain_alloc(struct irq_domain *domain, unsigned int virq, +static int plda_irq_msi_domain_alloc(struct irq_domain *domain, unsigned int virq, unsigned int nr_irqs, void *args) { struct plda_pcie_rp *port = domain->host_data; @@ -142,7 +142,7 @@ static struct msi_domain_info plda_msi_domain_info = { .chip = &plda_msi_irq_chip, }; -int plda_allocate_msi_domains(struct plda_pcie_rp *port) +static int plda_allocate_msi_domains(struct plda_pcie_rp *port) { struct device *dev = port->dev; struct fwnode_handle *fwnode = of_node_to_fwnode(dev->of_node); @@ -168,7 +168,7 @@ int plda_allocate_msi_domains(struct plda_pcie_rp *port) return 0; } -void plda_handle_intx(struct irq_desc *desc) +static void plda_handle_intx(struct irq_desc *desc) { struct plda_pcie_rp *port = irq_desc_get_handler_data(desc); struct irq_chip *chip = irq_desc_get_chip(desc); @@ -241,7 +241,7 @@ static struct irq_chip plda_intx_irq_chip = { .irq_unmask = plda_unmask_intx_irq, }; -int plda_pcie_intx_map(struct irq_domain *domain, unsigned int irq, +static int plda_pcie_intx_map(struct irq_domain *domain, unsigned int irq, irq_hw_number_t hwirq) { irq_set_chip_and_handler(irq, &plda_intx_irq_chip, handle_level_irq); @@ -250,12 +250,16 @@ int plda_pcie_intx_map(struct irq_domain *domain, unsigned int irq, return 0; } -irqreturn_t plda_event_handler(int irq, void *dev_id) +static const struct irq_domain_ops intx_domain_ops = { + .map = plda_pcie_intx_map, +}; + +static irqreturn_t plda_event_handler(int irq, void *dev_id) { return IRQ_HANDLED; } -void plda_handle_event(struct irq_desc *desc) +static void plda_handle_event(struct irq_desc *desc) { struct plda_pcie_rp *port = irq_desc_get_handler_data(desc); struct irq_chip *chip = irq_desc_get_chip(desc); @@ -264,14 +268,18 @@ void plda_handle_event(struct irq_desc *desc) chained_irq_enter(chip, desc); - val = readl_relaxed(port->bridge_addr + ISTATUS_LOCAL); - origin = val; - val = val >> A_ATR_EVT_POST_ERR_SHIFT; - events |= val & 0xff; - if (origin & PM_MSI_INT_INTX_MASK) - events |= BIT(EVENT_PM_MSI_INT_INTX); - val = (origin >> PM_MSI_INT_MSI_SHIFT) & 0xf; - events |= val << EVENT_PM_MSI_INT_MSI; + if (port->ops && port->ops->get_events) { + events = port->ops->get_events(port); + } else { + val = readl_relaxed(port->bridge_addr + ISTATUS_LOCAL); + origin = val; + val = val >> A_ATR_EVT_POST_ERR_SHIFT; + events |= val & 0xff; + if (origin & PM_MSI_INT_INTX_MASK) + events |= BIT(EVENT_PM_MSI_INT_INTX); + val = (origin >> PM_MSI_INT_MSI_SHIFT) & 0xf; + events |= val << EVENT_PM_MSI_INT_MSI; + } for_each_set_bit(bit, &events, port->num_events) generic_handle_domain_irq(port->event_domain, bit); @@ -349,6 +357,108 @@ static const struct irq_domain_ops plda_evt_dom_ops = { .map = plda_pcie_event_map, }; +static int plda_pcie_init_irq_domains(struct plda_pcie_rp *port, struct plda_evt *evt) +{ + struct device *dev = port->dev; + struct device_node *node = dev->of_node; + struct device_node *pcie_intc_node; + const struct irq_domain_ops *ops; + + /* Setup INTx */ + pcie_intc_node = of_get_next_child(node, NULL); + if (!pcie_intc_node) { + dev_err(dev, "failed to find PCIe Intc node\n"); + return -EINVAL; + } + + ops = evt->domain_ops ? evt->domain_ops : &plda_evt_dom_ops; + port->event_domain = irq_domain_add_linear(pcie_intc_node, port->num_events, + ops, port); + if (!port->event_domain) { + dev_err(dev, "failed to get event domain\n"); + of_node_put(pcie_intc_node); + return -ENOMEM; + } + + irq_domain_update_bus_token(port->event_domain, DOMAIN_BUS_NEXUS); + + port->intx_domain = irq_domain_add_linear(pcie_intc_node, PCI_NUM_INTX, + &intx_domain_ops, port); + if (!port->intx_domain) { + dev_err(dev, "failed to get an INTx IRQ domain\n"); + of_node_put(pcie_intc_node); + return -ENOMEM; + } + + irq_domain_update_bus_token(port->intx_domain, DOMAIN_BUS_WIRED); + + of_node_put(pcie_intc_node); + raw_spin_lock_init(&port->lock); + + return plda_allocate_msi_domains(port); +} + +int plda_init_interrupts(struct platform_device *pdev, + struct plda_pcie_rp *port, struct plda_evt *evt) +{ + struct device *dev = &pdev->dev; + int irq; + int i, intx_irq, msi_irq, event_irq; + int ret; + + ret = plda_pcie_init_irq_domains(port, evt); + if (ret) { + dev_err(dev, "failed creating IRQ domains\n"); + return ret; + } + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return -ENODEV; + + for (i = 0; i < port->num_events; i++) { + event_irq = irq_create_mapping(port->event_domain, i); + if (!event_irq) { + dev_err(dev, "failed to map hwirq %d\n", i); + return -ENXIO; + } + + if (evt->request_evt_irq) + ret = evt->request_evt_irq(port, event_irq, i); + else + ret = devm_request_irq(dev, event_irq, plda_event_handler, + 0, NULL, port); + if (ret) { + dev_err(dev, "failed to request IRQ %d\n", event_irq); + return ret; + } + } + + intx_irq = irq_create_mapping(port->event_domain, + evt->intx_evt); + if (!intx_irq) { + dev_err(dev, "failed to map INTx interrupt\n"); + return -ENXIO; + } + + /* Plug the INTx chained handler */ + irq_set_chained_handler_and_data(intx_irq, plda_handle_intx, port); + + msi_irq = irq_create_mapping(port->event_domain, + evt->msi_evt); + if (!msi_irq) + return -ENXIO; + + /* Plug the MSI chained handler */ + irq_set_chained_handler_and_data(msi_irq, plda_handle_msi, port); + + /* Plug the main event chained handler */ + irq_set_chained_handler_and_data(irq, plda_handle_event, port); + + return 0; +} +EXPORT_SYMBOL_GPL(plda_init_interrupts); + void plda_pcie_setup_window(void __iomem *bridge_base_addr, u32 index, phys_addr_t axi_addr, phys_addr_t pci_addr, size_t size) diff --git a/drivers/pci/controller/plda/pcie-plda.h b/drivers/pci/controller/plda/pcie-plda.h index 7571b0bbf37f..099a4fdd1148 100644 --- a/drivers/pci/controller/plda/pcie-plda.h +++ b/drivers/pci/controller/plda/pcie-plda.h @@ -107,6 +107,12 @@ #define PM_MSI_TO_MASK_OFFSET 19 +struct plda_pcie_rp; + +struct plda_pcie_ops { + u32 (*get_events)(struct plda_pcie_rp *pcie); +}; + struct plda_msi { struct mutex lock; /* Protect used bitmap */ struct irq_domain *msi_domain; @@ -122,6 +128,7 @@ struct plda_pcie_rp { struct irq_domain *event_domain; raw_spinlock_t lock; struct plda_msi msi; + const struct plda_pcie_ops *ops; void __iomem *bridge_addr; int num_events; }; @@ -133,12 +140,8 @@ struct plda_evt { int msi_evt; }; -void plda_handle_msi(struct irq_desc *desc); -int plda_allocate_msi_domains(struct plda_pcie_rp *port); -irqreturn_t plda_event_handler(int irq, void *dev_id); -void plda_handle_intx(struct irq_desc *desc); -int plda_pcie_intx_map(struct irq_domain *domain, unsigned int irq, - irq_hw_number_t hwirq); +int plda_init_interrupts(struct platform_device *pdev, + struct plda_pcie_rp *port, struct plda_evt *evt); void plda_pcie_setup_window(void __iomem *bridge_base_addr, u32 index, phys_addr_t axi_addr, phys_addr_t pci_addr, size_t size);