| Message ID | 20200213040644.45858-2-Zhiqiang.Hou@nxp.com (mailing list archive) |
|---|---|
| State | Accepted, archived |
| Delegated to: | Lorenzo Pieralisi |
| Headers | show |
| Series | PCI: Recode Mobiveil driver and add PCIe Gen4 driver for NXP Layerscape SoCs | expand |
On Thu, Feb 13, 2020 at 12:06:32PM +0800, Zhiqiang Hou wrote: > From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com> > > The Mobiveil PCIe controller can work in either Root Complex > mode or Endpoint mode. So introduce a new structure > mobiveil_root_port, and abstract the RC related members into > it such that the code can be used by both mode. > > Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com> Reviewed-by: Andrew Murray <amurray@thegoodpenguin.co.uk> > --- > V10: > - Refined the subject and change log. > - Added prefix mobiveil to the root port structure. > > 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..d4de560cd711 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 2019-2020 NXP > + * > * Author: Subrahmanya Lingappa <l.subrahmanya@mobiveil.co.in> > + * Hou Zhiqiang <Zhiqiang.Hou@nxp.com> > */ > > #include <linux/delay.h> > @@ -138,22 +141,27 @@ struct mobiveil_msi { /* MSI information */ > DECLARE_BITMAP(msi_irq_in_use, PCI_NUM_MSI); > }; > > +struct mobiveil_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; > +}; > + > 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 mobiveil_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 mobiveil_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 mobiveil_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 mobiveil_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 mobiveil_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 mobiveil_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 mobiveil_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 mobiveil_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 mobiveil_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 mobiveil_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 >
Hi Andrew, Thanks a lot for your review! Thanks, Zhiqiang > -----Original Message----- > From: Andrew Murray <amurray@thegoodpenguin.co.uk> > Sent: 2020年2月21日 1:13 > To: Z.q. Hou <zhiqiang.hou@nxp.com> > 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; andrew.murray@arm.com; > arnd@arndb.de; mark.rutland@arm.com; l.subrahmanya@mobiveil.co.in; > shawnguo@kernel.org; m.karthikeyan@mobiveil.co.in; Leo Li > <leoyang.li@nxp.com>; lorenzo.pieralisi@arm.com; > catalin.marinas@arm.com; will.deacon@arm.com; Mingkai Hu > <mingkai.hu@nxp.com>; M.h. Lian <minghuan.lian@nxp.com>; Xiaowei Bao > <xiaowei.bao@nxp.com> > Subject: Re: [PATCHv10 01/13] PCI: mobiveil: Introduce a new structure > mobiveil_root_port > > On Thu, Feb 13, 2020 at 12:06:32PM +0800, Zhiqiang Hou wrote: > > From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com> > > > > The Mobiveil PCIe controller can work in either Root Complex mode or > > Endpoint mode. So introduce a new structure mobiveil_root_port, and > > abstract the RC related members into it such that the code can be used > > by both mode. > > > > Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com> > > Reviewed-by: Andrew Murray <amurray@thegoodpenguin.co.uk> > > > --- > > V10: > > - Refined the subject and change log. > > - Added prefix mobiveil to the root port structure. > > > > 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..d4de560cd711 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 2019-2020 NXP > > + * > > * Author: Subrahmanya Lingappa <l.subrahmanya@mobiveil.co.in> > > + * Hou Zhiqiang <Zhiqiang.Hou@nxp.com> > > */ > > > > #include <linux/delay.h> > > @@ -138,22 +141,27 @@ struct mobiveil_msi { /* MSI > information */ > > DECLARE_BITMAP(msi_irq_in_use, PCI_NUM_MSI); }; > > > > +struct mobiveil_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; > > +}; > > + > > 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 mobiveil_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 mobiveil_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 mobiveil_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 mobiveil_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 mobiveil_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 mobiveil_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 mobiveil_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 mobiveil_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 mobiveil_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 mobiveil_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 > >
diff --git a/drivers/pci/controller/pcie-mobiveil.c b/drivers/pci/controller/pcie-mobiveil.c index 3a696ca45bfa..d4de560cd711 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 2019-2020 NXP + * * Author: Subrahmanya Lingappa <l.subrahmanya@mobiveil.co.in> + * Hou Zhiqiang <Zhiqiang.Hou@nxp.com> */ #include <linux/delay.h> @@ -138,22 +141,27 @@ struct mobiveil_msi { /* MSI information */ DECLARE_BITMAP(msi_irq_in_use, PCI_NUM_MSI); }; +struct mobiveil_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; +}; + 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 mobiveil_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 mobiveil_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 mobiveil_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 mobiveil_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 mobiveil_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 mobiveil_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 mobiveil_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 mobiveil_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 mobiveil_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 mobiveil_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;