forked from Minki/linux
2f37c5a81c
DesignWare v3.65 hardware implements MSI controller registers in application space. This requires updates to the DesignWare core to support controllers based on this older hardware. Add msi_irq_set()/clear() interfaces to allow Set/Clear MSI IRQ enable bit in the application register. Also, v3.65 hardware uses the MSI_IRQ register in application register space to raise MSI IRQ to the RC from EP. Current code uses the standard mechanism as per PCI spec. So add get_msi_data() to get the address of this register so common code can work on both v3.65 and newer hardware. [bhelgaas: changelog] Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Pratyush Anand <pratyush.anand@st.com> Acked-by: Mohit Kumar <mohit.kumar@st.com> Acked-by: Jingoo Han <jg1.han@samsung.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> CC: Russell King <linux@arm.linux.org.uk> CC: Grant Likely <grant.likely@linaro.org> CC: Rob Herring <robh+dt@kernel.org> CC: Richard Zhu <r65037@freescale.com> CC: Kishon Vijay Abraham I <kishon@ti.com> CC: Marek Vasut <marex@denx.de> CC: Arnd Bergmann <arnd@arndb.de> CC: Pawel Moll <pawel.moll@arm.com> CC: Mark Rutland <mark.rutland@arm.com> CC: Ian Campbell <ijc+devicetree@hellion.org.uk> CC: Kumar Gala <galak@codeaurora.org> CC: Randy Dunlap <rdunlap@infradead.org> CC: Grant Likely <grant.likely@linaro.org>
88 lines
2.6 KiB
C
88 lines
2.6 KiB
C
/*
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* Synopsys Designware PCIe host controller driver
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*
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* Copyright (C) 2013 Samsung Electronics Co., Ltd.
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* http://www.samsung.com
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*
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* Author: Jingoo Han <jg1.han@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef _PCIE_DESIGNWARE_H
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#define _PCIE_DESIGNWARE_H
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struct pcie_port_info {
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u32 cfg0_size;
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u32 cfg1_size;
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u32 io_size;
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u32 mem_size;
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phys_addr_t io_bus_addr;
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phys_addr_t mem_bus_addr;
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};
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/*
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* Maximum number of MSI IRQs can be 256 per controller. But keep
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* it 32 as of now. Probably we will never need more than 32. If needed,
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* then increment it in multiple of 32.
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*/
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#define MAX_MSI_IRQS 32
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#define MAX_MSI_CTRLS (MAX_MSI_IRQS / 32)
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struct pcie_port {
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struct device *dev;
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u8 root_bus_nr;
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void __iomem *dbi_base;
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u64 cfg0_base;
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u64 cfg0_mod_base;
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void __iomem *va_cfg0_base;
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u64 cfg1_base;
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u64 cfg1_mod_base;
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void __iomem *va_cfg1_base;
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u64 io_base;
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u64 io_mod_base;
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u64 mem_base;
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u64 mem_mod_base;
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struct resource cfg;
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struct resource io;
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struct resource mem;
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struct pcie_port_info config;
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int irq;
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u32 lanes;
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struct pcie_host_ops *ops;
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int msi_irq;
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struct irq_domain *irq_domain;
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unsigned long msi_data;
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DECLARE_BITMAP(msi_irq_in_use, MAX_MSI_IRQS);
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};
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struct pcie_host_ops {
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void (*readl_rc)(struct pcie_port *pp,
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void __iomem *dbi_base, u32 *val);
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void (*writel_rc)(struct pcie_port *pp,
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u32 val, void __iomem *dbi_base);
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int (*rd_own_conf)(struct pcie_port *pp, int where, int size, u32 *val);
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int (*wr_own_conf)(struct pcie_port *pp, int where, int size, u32 val);
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int (*rd_other_conf)(struct pcie_port *pp, struct pci_bus *bus,
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unsigned int devfn, int where, int size, u32 *val);
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int (*wr_other_conf)(struct pcie_port *pp, struct pci_bus *bus,
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unsigned int devfn, int where, int size, u32 val);
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int (*link_up)(struct pcie_port *pp);
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void (*host_init)(struct pcie_port *pp);
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void (*msi_set_irq)(struct pcie_port *pp, int irq);
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void (*msi_clear_irq)(struct pcie_port *pp, int irq);
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u32 (*get_msi_data)(struct pcie_port *pp);
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};
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int dw_pcie_cfg_read(void __iomem *addr, int where, int size, u32 *val);
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int dw_pcie_cfg_write(void __iomem *addr, int where, int size, u32 val);
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irqreturn_t dw_handle_msi_irq(struct pcie_port *pp);
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void dw_pcie_msi_init(struct pcie_port *pp);
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int dw_pcie_link_up(struct pcie_port *pp);
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void dw_pcie_setup_rc(struct pcie_port *pp);
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int dw_pcie_host_init(struct pcie_port *pp);
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#endif /* _PCIE_DESIGNWARE_H */
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