diff options
Diffstat (limited to 'drivers/pci/host/pci-mvebu.c')
| -rw-r--r-- | drivers/pci/host/pci-mvebu.c | 122 |
1 files changed, 90 insertions, 32 deletions
diff --git a/drivers/pci/host/pci-mvebu.c b/drivers/pci/host/pci-mvebu.c index 7bf3926aecc0..729d5a101d62 100644 --- a/drivers/pci/host/pci-mvebu.c +++ b/drivers/pci/host/pci-mvebu.c @@ -119,6 +119,10 @@ struct mvebu_pcie_port { u32 port; u32 lane; int devfn; + unsigned int mem_target; + unsigned int mem_attr; + unsigned int io_target; + unsigned int io_attr; struct clk *clk; struct mvebu_sw_pci_bridge bridge; struct device_node *dn; @@ -303,10 +307,9 @@ static void mvebu_pcie_handle_iobase_change(struct mvebu_pcie_port *port) (port->bridge.iolimitupper << 16)) - iobase); - mvebu_mbus_add_window_remap_flags(port->name, port->iowin_base, - port->iowin_size, - iobase, - MVEBU_MBUS_PCI_IO); + mvebu_mbus_add_window_remap_by_id(port->io_target, port->io_attr, + port->iowin_base, port->iowin_size, + iobase); pci_ioremap_io(iobase, port->iowin_base); } @@ -338,10 +341,8 @@ static void mvebu_pcie_handle_membase_change(struct mvebu_pcie_port *port) (((port->bridge.memlimit & 0xFFF0) << 16) | 0xFFFFF) - port->memwin_base; - mvebu_mbus_add_window_remap_flags(port->name, port->memwin_base, - port->memwin_size, - MVEBU_MBUS_NO_REMAP, - MVEBU_MBUS_PCI_MEM); + mvebu_mbus_add_window_by_id(port->mem_target, port->mem_attr, + port->memwin_base, port->memwin_size); } /* @@ -636,6 +637,8 @@ static int __init mvebu_pcie_setup(int nr, struct pci_sys_data *sys) for (i = 0; i < pcie->nports; i++) { struct mvebu_pcie_port *port = &pcie->ports[i]; + if (!port->base) + continue; mvebu_pcie_setup_hw(port); } @@ -725,17 +728,59 @@ mvebu_pcie_map_registers(struct platform_device *pdev, ret = of_address_to_resource(np, 0, ®s); if (ret) - return NULL; + return ERR_PTR(ret); + + return devm_ioremap_resource(&pdev->dev, ®s); +} + +#define DT_FLAGS_TO_TYPE(flags) (((flags) >> 24) & 0x03) +#define DT_TYPE_IO 0x1 +#define DT_TYPE_MEM32 0x2 +#define DT_CPUADDR_TO_TARGET(cpuaddr) (((cpuaddr) >> 56) & 0xFF) +#define DT_CPUADDR_TO_ATTR(cpuaddr) (((cpuaddr) >> 48) & 0xFF) + +static int mvebu_get_tgt_attr(struct device_node *np, int devfn, + unsigned long type, int *tgt, int *attr) +{ + const int na = 3, ns = 2; + const __be32 *range; + int rlen, nranges, rangesz, pna, i; + + range = of_get_property(np, "ranges", &rlen); + if (!range) + return -EINVAL; + + pna = of_n_addr_cells(np); + rangesz = pna + na + ns; + nranges = rlen / sizeof(__be32) / rangesz; + + for (i = 0; i < nranges; i++) { + u32 flags = of_read_number(range, 1); + u32 slot = of_read_number(range, 2); + u64 cpuaddr = of_read_number(range + na, pna); + unsigned long rtype; + + if (DT_FLAGS_TO_TYPE(flags) == DT_TYPE_IO) + rtype = IORESOURCE_IO; + else if (DT_FLAGS_TO_TYPE(flags) == DT_TYPE_MEM32) + rtype = IORESOURCE_MEM; + + if (slot == PCI_SLOT(devfn) && type == rtype) { + *tgt = DT_CPUADDR_TO_TARGET(cpuaddr); + *attr = DT_CPUADDR_TO_ATTR(cpuaddr); + return 0; + } + + range += rangesz; + } - return devm_request_and_ioremap(&pdev->dev, ®s); + return -ENOENT; } static int __init mvebu_pcie_probe(struct platform_device *pdev) { struct mvebu_pcie *pcie; struct device_node *np = pdev->dev.of_node; - struct of_pci_range range; - struct of_pci_range_parser parser; struct device_node *child; int i, ret; @@ -746,29 +791,25 @@ static int __init mvebu_pcie_probe(struct platform_device *pdev) pcie->pdev = pdev; - if (of_pci_range_parser_init(&parser, np)) + /* Get the PCIe memory and I/O aperture */ + mvebu_mbus_get_pcie_mem_aperture(&pcie->mem); + if (resource_size(&pcie->mem) == 0) { + dev_err(&pdev->dev, "invalid memory aperture size\n"); return -EINVAL; + } - /* Get the I/O and memory ranges from DT */ - for_each_of_pci_range(&parser, &range) { - unsigned long restype = range.flags & IORESOURCE_TYPE_BITS; - if (restype == IORESOURCE_IO) { - of_pci_range_to_resource(&range, np, &pcie->io); - of_pci_range_to_resource(&range, np, &pcie->realio); - pcie->io.name = "I/O"; - pcie->realio.start = max_t(resource_size_t, - PCIBIOS_MIN_IO, - range.pci_addr); - pcie->realio.end = min_t(resource_size_t, - IO_SPACE_LIMIT, - range.pci_addr + range.size); - } - if (restype == IORESOURCE_MEM) { - of_pci_range_to_resource(&range, np, &pcie->mem); - pcie->mem.name = "MEM"; - } + mvebu_mbus_get_pcie_io_aperture(&pcie->io); + if (resource_size(&pcie->io) == 0) { + dev_err(&pdev->dev, "invalid I/O aperture size\n"); + return -EINVAL; } + pcie->realio.flags = pcie->io.flags; + pcie->realio.start = PCIBIOS_MIN_IO; + pcie->realio.end = min_t(resource_size_t, + IO_SPACE_LIMIT, + resource_size(&pcie->io)); + /* Get the bus range */ ret = of_pci_parse_bus_range(np, &pcie->busn); if (ret) { @@ -816,10 +857,27 @@ static int __init mvebu_pcie_probe(struct platform_device *pdev) if (port->devfn < 0) continue; + ret = mvebu_get_tgt_attr(np, port->devfn, IORESOURCE_MEM, + &port->mem_target, &port->mem_attr); + if (ret < 0) { + dev_err(&pdev->dev, "PCIe%d.%d: cannot get tgt/attr for mem window\n", + port->port, port->lane); + continue; + } + + ret = mvebu_get_tgt_attr(np, port->devfn, IORESOURCE_IO, + &port->io_target, &port->io_attr); + if (ret < 0) { + dev_err(&pdev->dev, "PCIe%d.%d: cannot get tgt/attr for io window\n", + port->port, port->lane); + continue; + } + port->base = mvebu_pcie_map_registers(pdev, child, port); - if (!port->base) { + if (IS_ERR(port->base)) { dev_err(&pdev->dev, "PCIe%d.%d: cannot map registers\n", port->port, port->lane); + port->base = NULL; continue; } |