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Hou" Cc: Andrew Murray , "linux-pci@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "devicetree@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "bhelgaas@google.com" , "robh+dt@kernel.org" , "arnd@arndb.de" , "mark.rutland@arm.com" , "l.subrahmanya@mobiveil.co.in" , "shawnguo@kernel.org" , "m.karthikeyan@mobiveil.co.in" , Leo Li , "lorenzo.pieralisi@arm.com" , "catalin.marinas@arm.com" , "will.deacon@arm.com" , Mingkai Hu , "M.h. Lian" , Xiaowei Bao Subject: Re: [PATCHv9 01/12] PCI: mobiveil: Re-abstract the private structure Message-ID: <20200206112723.GA19388@big-machine> References: <20191120034451.30102-1-Zhiqiang.Hou@nxp.com> <20191120034451.30102-2-Zhiqiang.Hou@nxp.com> <20200113100931.GG42593@e119886-lin.cambridge.arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Feb 06, 2020 at 11:04:29AM +0000, Z.q. Hou wrote: > Hi Andrew, > > Thanks a lot for your comments! > Sorry for my delay respond! > > > -----Original Message----- > > From: Andrew Murray > > Sent: 2020年1月13日 18:10 > > To: Z.q. Hou > > Cc: linux-pci@vger.kernel.org; linux-arm-kernel@lists.infradead.org; > > devicetree@vger.kernel.org; linux-kernel@vger.kernel.org; > > bhelgaas@google.com; robh+dt@kernel.org; arnd@arndb.de; > > mark.rutland@arm.com; l.subrahmanya@mobiveil.co.in; > > shawnguo@kernel.org; m.karthikeyan@mobiveil.co.in; Leo Li > > ; lorenzo.pieralisi@arm.com; > > catalin.marinas@arm.com; will.deacon@arm.com; Mingkai Hu > > ; M.h. Lian ; Xiaowei Bao > > > > Subject: Re: [PATCHv9 01/12] PCI: mobiveil: Re-abstract the private structure > > > > On Wed, Nov 20, 2019 at 03:45:23AM +0000, Z.q. Hou wrote: > > > From: Hou Zhiqiang > > > > > > The Mobiveil PCIe controller can work in either Root Complex mode or > > > Endpoint mode. So introduce a new structure root_port, and abstract > > > the RC related members into it. > > > > The first sentence explains the trigger for this work, the second explains what > > you are changing, it would be helpful to also describe why you need to make > > this change. You could do this by extending the last sentence, e.g. > > > > "So introduce a new structure root_port, and abstract the RC related > > members into it such that it can be used by both ..." > > > > As this series doesn't actually add a EP driver, this abstraction isn't needed > > now - but it is nice to have - it may be helpful to explain this. > > > > The email subject could also more precisely explain what this patch does. > > Thanks for the good suggestions! Will change in v10. > > > > > > > > > > > Signed-off-by: Hou Zhiqiang > > > --- > > > V9: > > > - New patch splited from the #1 of V8 patches to make it easy to review. > > > > Indeed, it's much nicer to review - thanks. > > > > > > > > > > drivers/pci/controller/pcie-mobiveil.c | 99 > > > ++++++++++++++++---------- > > > 1 file changed, 60 insertions(+), 39 deletions(-) > > > > > > diff --git a/drivers/pci/controller/pcie-mobiveil.c > > > b/drivers/pci/controller/pcie-mobiveil.c > > > index 3a696ca45bfa..5fd26e376af2 100644 > > > --- a/drivers/pci/controller/pcie-mobiveil.c > > > +++ b/drivers/pci/controller/pcie-mobiveil.c > > > @@ -3,7 +3,10 @@ > > > * PCIe host controller driver for Mobiveil PCIe Host controller > > > * > > > * Copyright (c) 2018 Mobiveil Inc. > > > + * Copyright 2019 NXP > > > + * > > > * Author: Subrahmanya Lingappa > > > + * Recode: Hou Zhiqiang > > > > As per my previous feedback, I'm not sure the value of using the term refactor > > or a synonym of it. And I certaintly don't want to encourage anyone that > > modifies this file to add a similar tag when the information is easily visible via > > GIT and the get_maintainers script. > > Will remove the recode tag in v10. > > > > > > */ > > > > > > #include > > > @@ -138,22 +141,27 @@ struct mobiveil_msi { /* MSI > > information */ > > > DECLARE_BITMAP(msi_irq_in_use, PCI_NUM_MSI); }; > > > > > > +struct root_port { > > > + char root_bus_nr; > > > + void __iomem *config_axi_slave_base; /* endpoint config base */ > > > + struct resource *ob_io_res; > > > + int irq; > > > + raw_spinlock_t intx_mask_lock; > > > + struct irq_domain *intx_domain; > > > + struct mobiveil_msi msi; > > > + struct pci_host_bridge *bridge; > > > +}; > > > > Please prefix with mobiveil given we have mobiveil related structures inside it. > > Do you mean s/root_port/mobiveil_root_port/ ? Yes! Thanks, Andrew Murray > > Thanks, > Zhiqiang > > > > > (Also on your respin, please rebase as per Olof's feedback). > > > > Thanks, > > > > Andrew Murray > > > > > + > > > struct mobiveil_pcie { > > > struct platform_device *pdev; > > > - void __iomem *config_axi_slave_base; /* endpoint config base */ > > > void __iomem *csr_axi_slave_base; /* root port config base */ > > > void __iomem *apb_csr_base; /* MSI register base */ > > > phys_addr_t pcie_reg_base; /* Physical PCIe Controller Base */ > > > - struct irq_domain *intx_domain; > > > - raw_spinlock_t intx_mask_lock; > > > - int irq; > > > int apio_wins; > > > int ppio_wins; > > > int ob_wins_configured; /* configured outbound windows */ > > > int ib_wins_configured; /* configured inbound windows */ > > > - struct resource *ob_io_res; > > > - char root_bus_nr; > > > - struct mobiveil_msi msi; > > > + struct root_port rp; > > > }; > > > > > > /* > > > @@ -281,16 +289,17 @@ static bool mobiveil_pcie_link_up(struct > > > mobiveil_pcie *pcie) static bool mobiveil_pcie_valid_device(struct > > > pci_bus *bus, unsigned int devfn) { > > > struct mobiveil_pcie *pcie = bus->sysdata; > > > + struct root_port *rp = &pcie->rp; > > > > > > /* Only one device down on each root port */ > > > - if ((bus->number == pcie->root_bus_nr) && (devfn > 0)) > > > + if ((bus->number == rp->root_bus_nr) && (devfn > 0)) > > > return false; > > > > > > /* > > > * Do not read more than one device on the bus directly > > > * attached to RC > > > */ > > > - if ((bus->primary == pcie->root_bus_nr) && (PCI_SLOT(devfn) > 0)) > > > + if ((bus->primary == rp->root_bus_nr) && (PCI_SLOT(devfn) > 0)) > > > return false; > > > > > > return true; > > > @@ -304,13 +313,14 @@ static void __iomem > > *mobiveil_pcie_map_bus(struct pci_bus *bus, > > > unsigned int devfn, int where) { > > > struct mobiveil_pcie *pcie = bus->sysdata; > > > + struct root_port *rp = &pcie->rp; > > > u32 value; > > > > > > if (!mobiveil_pcie_valid_device(bus, devfn)) > > > return NULL; > > > > > > /* RC config access */ > > > - if (bus->number == pcie->root_bus_nr) > > > + if (bus->number == rp->root_bus_nr) > > > return pcie->csr_axi_slave_base + where; > > > > > > /* > > > @@ -325,7 +335,7 @@ static void __iomem > > *mobiveil_pcie_map_bus(struct > > > pci_bus *bus, > > > > > > mobiveil_csr_writel(pcie, value, > > PAB_AXI_AMAP_PEX_WIN_L(WIN_NUM_0)); > > > > > > - return pcie->config_axi_slave_base + where; > > > + return rp->config_axi_slave_base + where; > > > } > > > > > > static struct pci_ops mobiveil_pcie_ops = { @@ -339,7 +349,8 @@ > > > static void mobiveil_pcie_isr(struct irq_desc *desc) > > > struct irq_chip *chip = irq_desc_get_chip(desc); > > > struct mobiveil_pcie *pcie = irq_desc_get_handler_data(desc); > > > struct device *dev = &pcie->pdev->dev; > > > - struct mobiveil_msi *msi = &pcie->msi; > > > + struct root_port *rp = &pcie->rp; > > > + struct mobiveil_msi *msi = &rp->msi; > > > u32 msi_data, msi_addr_lo, msi_addr_hi; > > > u32 intr_status, msi_status; > > > unsigned long shifted_status; > > > @@ -365,7 +376,7 @@ static void mobiveil_pcie_isr(struct irq_desc *desc) > > > shifted_status >>= PAB_INTX_START; > > > do { > > > for_each_set_bit(bit, &shifted_status, PCI_NUM_INTX) { > > > - virq = irq_find_mapping(pcie->intx_domain, > > > + virq = irq_find_mapping(rp->intx_domain, > > > bit + 1); > > > if (virq) > > > generic_handle_irq(virq); > > > @@ -424,15 +435,16 @@ static int mobiveil_pcie_parse_dt(struct > > mobiveil_pcie *pcie) > > > struct device *dev = &pcie->pdev->dev; > > > struct platform_device *pdev = pcie->pdev; > > > struct device_node *node = dev->of_node; > > > + struct root_port *rp = &pcie->rp; > > > struct resource *res; > > > > > > /* map config resource */ > > > res = platform_get_resource_byname(pdev, IORESOURCE_MEM, > > > "config_axi_slave"); > > > - pcie->config_axi_slave_base = devm_pci_remap_cfg_resource(dev, res); > > > - if (IS_ERR(pcie->config_axi_slave_base)) > > > - return PTR_ERR(pcie->config_axi_slave_base); > > > - pcie->ob_io_res = res; > > > + rp->config_axi_slave_base = devm_pci_remap_cfg_resource(dev, res); > > > + if (IS_ERR(rp->config_axi_slave_base)) > > > + return PTR_ERR(rp->config_axi_slave_base); > > > + rp->ob_io_res = res; > > > > > > /* map csr resource */ > > > res = platform_get_resource_byname(pdev, IORESOURCE_MEM, @@ > > -455,9 > > > +467,9 @@ static int mobiveil_pcie_parse_dt(struct mobiveil_pcie *pcie) > > > if (of_property_read_u32(node, "ppio-wins", &pcie->ppio_wins)) > > > pcie->ppio_wins = MAX_PIO_WINDOWS; > > > > > > - pcie->irq = platform_get_irq(pdev, 0); > > > - if (pcie->irq <= 0) { > > > - dev_err(dev, "failed to map IRQ: %d\n", pcie->irq); > > > + rp->irq = platform_get_irq(pdev, 0); > > > + if (rp->irq <= 0) { > > > + dev_err(dev, "failed to map IRQ: %d\n", rp->irq); > > > return -ENODEV; > > > } > > > > > > @@ -564,9 +576,9 @@ static int mobiveil_bringup_link(struct > > > mobiveil_pcie *pcie) static void mobiveil_pcie_enable_msi(struct > > > mobiveil_pcie *pcie) { > > > phys_addr_t msg_addr = pcie->pcie_reg_base; > > > - struct mobiveil_msi *msi = &pcie->msi; > > > + struct mobiveil_msi *msi = &pcie->rp.msi; > > > > > > - pcie->msi.num_of_vectors = PCI_NUM_MSI; > > > + msi->num_of_vectors = PCI_NUM_MSI; > > > msi->msi_pages_phys = (phys_addr_t)msg_addr; > > > > > > writel_relaxed(lower_32_bits(msg_addr), > > > @@ -579,7 +591,8 @@ static void mobiveil_pcie_enable_msi(struct > > > mobiveil_pcie *pcie) > > > > > > static int mobiveil_host_init(struct mobiveil_pcie *pcie) { > > > - struct pci_host_bridge *bridge = pci_host_bridge_from_priv(pcie); > > > + struct root_port *rp = &pcie->rp; > > > + struct pci_host_bridge *bridge = rp->bridge; > > > u32 value, pab_ctrl, type; > > > struct resource_entry *win; > > > > > > @@ -629,8 +642,8 @@ static int mobiveil_host_init(struct mobiveil_pcie > > *pcie) > > > */ > > > > > > /* config outbound translation window */ > > > - program_ob_windows(pcie, WIN_NUM_0, pcie->ob_io_res->start, 0, > > > - CFG_WINDOW_TYPE, resource_size(pcie->ob_io_res)); > > > + program_ob_windows(pcie, WIN_NUM_0, rp->ob_io_res->start, 0, > > > + CFG_WINDOW_TYPE, resource_size(rp->ob_io_res)); > > > > > > /* memory inbound translation window */ > > > program_ib_windows(pcie, WIN_NUM_0, 0, 0, MEM_WINDOW_TYPE, > > > IB_WIN_SIZE); @@ -667,32 +680,36 @@ static void > > > mobiveil_mask_intx_irq(struct irq_data *data) { > > > struct irq_desc *desc = irq_to_desc(data->irq); > > > struct mobiveil_pcie *pcie; > > > + struct root_port *rp; > > > unsigned long flags; > > > u32 mask, shifted_val; > > > > > > pcie = irq_desc_get_chip_data(desc); > > > + rp = &pcie->rp; > > > mask = 1 << ((data->hwirq + PAB_INTX_START) - 1); > > > - raw_spin_lock_irqsave(&pcie->intx_mask_lock, flags); > > > + raw_spin_lock_irqsave(&rp->intx_mask_lock, flags); > > > shifted_val = mobiveil_csr_readl(pcie, PAB_INTP_AMBA_MISC_ENB); > > > shifted_val &= ~mask; > > > mobiveil_csr_writel(pcie, shifted_val, PAB_INTP_AMBA_MISC_ENB); > > > - raw_spin_unlock_irqrestore(&pcie->intx_mask_lock, flags); > > > + raw_spin_unlock_irqrestore(&rp->intx_mask_lock, flags); > > > } > > > > > > static void mobiveil_unmask_intx_irq(struct irq_data *data) { > > > struct irq_desc *desc = irq_to_desc(data->irq); > > > struct mobiveil_pcie *pcie; > > > + struct root_port *rp; > > > unsigned long flags; > > > u32 shifted_val, mask; > > > > > > pcie = irq_desc_get_chip_data(desc); > > > + rp = &pcie->rp; > > > mask = 1 << ((data->hwirq + PAB_INTX_START) - 1); > > > - raw_spin_lock_irqsave(&pcie->intx_mask_lock, flags); > > > + raw_spin_lock_irqsave(&rp->intx_mask_lock, flags); > > > shifted_val = mobiveil_csr_readl(pcie, PAB_INTP_AMBA_MISC_ENB); > > > shifted_val |= mask; > > > mobiveil_csr_writel(pcie, shifted_val, PAB_INTP_AMBA_MISC_ENB); > > > - raw_spin_unlock_irqrestore(&pcie->intx_mask_lock, flags); > > > + raw_spin_unlock_irqrestore(&rp->intx_mask_lock, flags); > > > } > > > > > > static struct irq_chip intx_irq_chip = { @@ -760,7 +777,7 @@ static > > > int mobiveil_irq_msi_domain_alloc(struct irq_domain *domain, > > > unsigned int nr_irqs, void *args) { > > > struct mobiveil_pcie *pcie = domain->host_data; > > > - struct mobiveil_msi *msi = &pcie->msi; > > > + struct mobiveil_msi *msi = &pcie->rp.msi; > > > unsigned long bit; > > > > > > WARN_ON(nr_irqs != 1); > > > @@ -787,7 +804,7 @@ static void mobiveil_irq_msi_domain_free(struct > > > irq_domain *domain, { > > > struct irq_data *d = irq_domain_get_irq_data(domain, virq); > > > struct mobiveil_pcie *pcie = irq_data_get_irq_chip_data(d); > > > - struct mobiveil_msi *msi = &pcie->msi; > > > + struct mobiveil_msi *msi = &pcie->rp.msi; > > > > > > mutex_lock(&msi->lock); > > > > > > @@ -808,9 +825,9 @@ static int mobiveil_allocate_msi_domains(struct > > > mobiveil_pcie *pcie) { > > > struct device *dev = &pcie->pdev->dev; > > > struct fwnode_handle *fwnode = of_node_to_fwnode(dev->of_node); > > > - struct mobiveil_msi *msi = &pcie->msi; > > > + struct mobiveil_msi *msi = &pcie->rp.msi; > > > > > > - mutex_init(&pcie->msi.lock); > > > + mutex_init(&msi->lock); > > > msi->dev_domain = irq_domain_add_linear(NULL, > > msi->num_of_vectors, > > > &msi_domain_ops, pcie); > > > if (!msi->dev_domain) { > > > @@ -834,18 +851,19 @@ static int mobiveil_pcie_init_irq_domain(struct > > > mobiveil_pcie *pcie) { > > > struct device *dev = &pcie->pdev->dev; > > > struct device_node *node = dev->of_node; > > > + struct root_port *rp = &pcie->rp; > > > int ret; > > > > > > /* setup INTx */ > > > - pcie->intx_domain = irq_domain_add_linear(node, PCI_NUM_INTX, > > > - &intx_domain_ops, pcie); > > > + rp->intx_domain = irq_domain_add_linear(node, PCI_NUM_INTX, > > > + &intx_domain_ops, pcie); > > > > > > - if (!pcie->intx_domain) { > > > + if (!rp->intx_domain) { > > > dev_err(dev, "Failed to get a INTx IRQ domain\n"); > > > return -ENOMEM; > > > } > > > > > > - raw_spin_lock_init(&pcie->intx_mask_lock); > > > + raw_spin_lock_init(&rp->intx_mask_lock); > > > > > > /* setup MSI */ > > > ret = mobiveil_allocate_msi_domains(pcie); > > > @@ -862,6 +880,7 @@ static int mobiveil_pcie_probe(struct > > platform_device *pdev) > > > struct pci_bus *child; > > > struct pci_host_bridge *bridge; > > > struct device *dev = &pdev->dev; > > > + struct root_port *rp; > > > int ret; > > > > > > /* allocate the PCIe port */ > > > @@ -870,6 +889,8 @@ static int mobiveil_pcie_probe(struct > > platform_device *pdev) > > > return -ENOMEM; > > > > > > pcie = pci_host_bridge_priv(bridge); > > > + rp = &pcie->rp; > > > + rp->bridge = bridge; > > > > > > pcie->pdev = pdev; > > > > > > @@ -904,12 +925,12 @@ static int mobiveil_pcie_probe(struct > > platform_device *pdev) > > > return ret; > > > } > > > > > > - irq_set_chained_handler_and_data(pcie->irq, mobiveil_pcie_isr, pcie); > > > + irq_set_chained_handler_and_data(rp->irq, mobiveil_pcie_isr, pcie); > > > > > > /* Initialize bridge */ > > > bridge->dev.parent = dev; > > > bridge->sysdata = pcie; > > > - bridge->busnr = pcie->root_bus_nr; > > > + bridge->busnr = rp->root_bus_nr; > > > bridge->ops = &mobiveil_pcie_ops; > > > bridge->map_irq = of_irq_parse_and_map_pci; > > > bridge->swizzle_irq = pci_common_swizzle; > > > -- > > > 2.17.1 > > > 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=-4.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,URIBL_DBL_ABUSE_MALW autolearn=no 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 707DEC2D0B1 for ; Thu, 6 Feb 2020 11:27:44 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 3FA4D20730 for ; 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Hou" Subject: Re: [PATCHv9 01/12] PCI: mobiveil: Re-abstract the private structure Message-ID: <20200206112723.GA19388@big-machine> References: <20191120034451.30102-1-Zhiqiang.Hou@nxp.com> <20191120034451.30102-2-Zhiqiang.Hou@nxp.com> <20200113100931.GG42593@e119886-lin.cambridge.arm.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200206_032732_123492_CE143C08 X-CRM114-Status: GOOD ( 34.77 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "mark.rutland@arm.com" , "devicetree@vger.kernel.org" , "lorenzo.pieralisi@arm.com" , "m.karthikeyan@mobiveil.co.in" , "arnd@arndb.de" , "linux-pci@vger.kernel.org" , "l.subrahmanya@mobiveil.co.in" , "will.deacon@arm.com" , "linux-kernel@vger.kernel.org" , Leo Li , "M.h. Lian" , "robh+dt@kernel.org" , Mingkai Hu , Xiaowei Bao , "catalin.marinas@arm.com" , "bhelgaas@google.com" , Andrew Murray , "shawnguo@kernel.org" , "linux-arm-kernel@lists.infradead.org" Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gVGh1LCBGZWIgMDYsIDIwMjAgYXQgMTE6MDQ6MjlBTSArMDAwMCwgWi5xLiBIb3Ugd3JvdGU6 Cj4gSGkgQW5kcmV3LAo+IAo+IFRoYW5rcyBhIGxvdCBmb3IgeW91ciBjb21tZW50cyEKPiBTb3Jy eSBmb3IgbXkgZGVsYXkgcmVzcG9uZCEKPiAKPiA+IC0tLS0tT3JpZ2luYWwgTWVzc2FnZS0tLS0t Cj4gPiBGcm9tOiBBbmRyZXcgTXVycmF5IDxhbmRyZXcubXVycmF5QGFybS5jb20+Cj4gPiBTZW50 OiAyMDIw5bm0MeaciDEz5pelIDE4OjEwCj4gPiBUbzogWi5xLiBIb3UgPHpoaXFpYW5nLmhvdUBu eHAuY29tPgo+ID4gQ2M6IGxpbnV4LXBjaUB2Z2VyLmtlcm5lbC5vcmc7IGxpbnV4LWFybS1rZXJu ZWxAbGlzdHMuaW5mcmFkZWFkLm9yZzsKPiA+IGRldmljZXRyZWVAdmdlci5rZXJuZWwub3JnOyBs 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