[PATCH 08/10] PCI: dwc: Split pcie-designware.c into host and core files
Kishon Vijay Abraham I
kishon at ti.com
Wed Feb 15 05:18:17 PST 2017
Split pcie-designware.c into pcie-designware-host.c that contains
the host specific parts of the driver and pcie-designware.c that
contains the parts used by both host driver and endpoint driver.
Signed-off-by: Kishon Vijay Abraham I <kishon at ti.com>
---
drivers/pci/dwc/Makefile | 2 +-
drivers/pci/dwc/pcie-designware-host.c | 635 ++++++++++++++++++++++++++++++++
drivers/pci/dwc/pcie-designware.c | 629 +------------------------------
drivers/pci/dwc/pcie-designware.h | 8 +
4 files changed, 650 insertions(+), 624 deletions(-)
create mode 100644 drivers/pci/dwc/pcie-designware-host.c
diff --git a/drivers/pci/dwc/Makefile b/drivers/pci/dwc/Makefile
index 7d27c14..3b57e55 100644
--- a/drivers/pci/dwc/Makefile
+++ b/drivers/pci/dwc/Makefile
@@ -1,4 +1,4 @@
-obj-$(CONFIG_PCIE_DW) += pcie-designware.o
+obj-$(CONFIG_PCIE_DW) += pcie-designware.o pcie-designware-host.o
obj-$(CONFIG_PCIE_DW_PLAT) += pcie-designware-plat.o
obj-$(CONFIG_PCI_DRA7XX) += pci-dra7xx.o
obj-$(CONFIG_PCI_EXYNOS) += pci-exynos.o
diff --git a/drivers/pci/dwc/pcie-designware-host.c b/drivers/pci/dwc/pcie-designware-host.c
new file mode 100644
index 0000000..5ba3349
--- /dev/null
+++ b/drivers/pci/dwc/pcie-designware-host.c
@@ -0,0 +1,635 @@
+/*
+ * Synopsys Designware PCIe host controller driver
+ *
+ * Copyright (C) 2013 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * Author: Jingoo Han <jg1.han at samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/irqdomain.h>
+#include <linux/of_address.h>
+#include <linux/of_pci.h>
+#include <linux/pci_regs.h>
+#include <linux/platform_device.h>
+
+#include "pcie-designware.h"
+
+static struct pci_ops dw_pcie_ops;
+
+static int dw_pcie_rd_own_conf(struct pcie_port *pp, int where, int size,
+ u32 *val)
+{
+ struct dw_pcie *pci;
+
+ if (pp->ops->rd_own_conf)
+ return pp->ops->rd_own_conf(pp, where, size, val);
+
+ pci = to_dw_pcie_from_pp(pp);
+ return dw_pcie_read(pci->dbi_base + where, size, val);
+}
+
+static int dw_pcie_wr_own_conf(struct pcie_port *pp, int where, int size,
+ u32 val)
+{
+ struct dw_pcie *pci;
+
+ if (pp->ops->wr_own_conf)
+ return pp->ops->wr_own_conf(pp, where, size, val);
+
+ pci = to_dw_pcie_from_pp(pp);
+ return dw_pcie_write(pci->dbi_base + where, size, val);
+}
+
+static struct irq_chip dw_msi_irq_chip = {
+ .name = "PCI-MSI",
+ .irq_enable = pci_msi_unmask_irq,
+ .irq_disable = pci_msi_mask_irq,
+ .irq_mask = pci_msi_mask_irq,
+ .irq_unmask = pci_msi_unmask_irq,
+};
+
+/* MSI int handler */
+irqreturn_t dw_handle_msi_irq(struct pcie_port *pp)
+{
+ unsigned long val;
+ int i, pos, irq;
+ irqreturn_t ret = IRQ_NONE;
+
+ for (i = 0; i < MAX_MSI_CTRLS; i++) {
+ dw_pcie_rd_own_conf(pp, PCIE_MSI_INTR0_STATUS + i * 12, 4,
+ (u32 *)&val);
+ if (val) {
+ ret = IRQ_HANDLED;
+ pos = 0;
+ while ((pos = find_next_bit(&val, 32, pos)) != 32) {
+ irq = irq_find_mapping(pp->irq_domain,
+ i * 32 + pos);
+ dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_STATUS +
+ i * 12, 4, 1 << pos);
+ generic_handle_irq(irq);
+ pos++;
+ }
+ }
+ }
+
+ return ret;
+}
+
+void dw_pcie_msi_init(struct pcie_port *pp)
+{
+ u64 msi_target;
+
+ pp->msi_data = __get_free_pages(GFP_KERNEL, 0);
+ msi_target = virt_to_phys((void *)pp->msi_data);
+
+ /* program the msi_data */
+ dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_LO, 4,
+ (u32)(msi_target & 0xffffffff));
+ dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_HI, 4,
+ (u32)(msi_target >> 32 & 0xffffffff));
+}
+
+static void dw_pcie_msi_clear_irq(struct pcie_port *pp, int irq)
+{
+ unsigned int res, bit, val;
+
+ res = (irq / 32) * 12;
+ bit = irq % 32;
+ dw_pcie_rd_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4, &val);
+ val &= ~(1 << bit);
+ dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4, val);
+}
+
+static void clear_irq_range(struct pcie_port *pp, unsigned int irq_base,
+ unsigned int nvec, unsigned int pos)
+{
+ unsigned int i;
+
+ for (i = 0; i < nvec; i++) {
+ irq_set_msi_desc_off(irq_base, i, NULL);
+ /* Disable corresponding interrupt on MSI controller */
+ if (pp->ops->msi_clear_irq)
+ pp->ops->msi_clear_irq(pp, pos + i);
+ else
+ dw_pcie_msi_clear_irq(pp, pos + i);
+ }
+
+ bitmap_release_region(pp->msi_irq_in_use, pos, order_base_2(nvec));
+}
+
+static void dw_pcie_msi_set_irq(struct pcie_port *pp, int irq)
+{
+ unsigned int res, bit, val;
+
+ res = (irq / 32) * 12;
+ bit = irq % 32;
+ dw_pcie_rd_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4, &val);
+ val |= 1 << bit;
+ dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4, val);
+}
+
+static int assign_irq(int no_irqs, struct msi_desc *desc, int *pos)
+{
+ int irq, pos0, i;
+ struct pcie_port *pp;
+
+ pp = (struct pcie_port *)msi_desc_to_pci_sysdata(desc);
+ pos0 = bitmap_find_free_region(pp->msi_irq_in_use, MAX_MSI_IRQS,
+ order_base_2(no_irqs));
+ if (pos0 < 0)
+ goto no_valid_irq;
+
+ irq = irq_find_mapping(pp->irq_domain, pos0);
+ if (!irq)
+ goto no_valid_irq;
+
+ /*
+ * irq_create_mapping (called from dw_pcie_host_init) pre-allocates
+ * descs so there is no need to allocate descs here. We can therefore
+ * assume that if irq_find_mapping above returns non-zero, then the
+ * descs are also successfully allocated.
+ */
+
+ for (i = 0; i < no_irqs; i++) {
+ if (irq_set_msi_desc_off(irq, i, desc) != 0) {
+ clear_irq_range(pp, irq, i, pos0);
+ goto no_valid_irq;
+ }
+ /*Enable corresponding interrupt in MSI interrupt controller */
+ if (pp->ops->msi_set_irq)
+ pp->ops->msi_set_irq(pp, pos0 + i);
+ else
+ dw_pcie_msi_set_irq(pp, pos0 + i);
+ }
+
+ *pos = pos0;
+ desc->nvec_used = no_irqs;
+ desc->msi_attrib.multiple = order_base_2(no_irqs);
+
+ return irq;
+
+no_valid_irq:
+ *pos = pos0;
+ return -ENOSPC;
+}
+
+static void dw_msi_setup_msg(struct pcie_port *pp, unsigned int irq, u32 pos)
+{
+ struct msi_msg msg;
+ u64 msi_target;
+
+ if (pp->ops->get_msi_addr)
+ msi_target = pp->ops->get_msi_addr(pp);
+ else
+ msi_target = virt_to_phys((void *)pp->msi_data);
+
+ msg.address_lo = (u32)(msi_target & 0xffffffff);
+ msg.address_hi = (u32)(msi_target >> 32 & 0xffffffff);
+
+ if (pp->ops->get_msi_data)
+ msg.data = pp->ops->get_msi_data(pp, pos);
+ else
+ msg.data = pos;
+
+ pci_write_msi_msg(irq, &msg);
+}
+
+static int dw_msi_setup_irq(struct msi_controller *chip, struct pci_dev *pdev,
+ struct msi_desc *desc)
+{
+ int irq, pos;
+ struct pcie_port *pp = pdev->bus->sysdata;
+
+ if (desc->msi_attrib.is_msix)
+ return -EINVAL;
+
+ irq = assign_irq(1, desc, &pos);
+ if (irq < 0)
+ return irq;
+
+ dw_msi_setup_msg(pp, irq, pos);
+
+ return 0;
+}
+
+static int dw_msi_setup_irqs(struct msi_controller *chip, struct pci_dev *pdev,
+ int nvec, int type)
+{
+#ifdef CONFIG_PCI_MSI
+ int irq, pos;
+ struct msi_desc *desc;
+ struct pcie_port *pp = pdev->bus->sysdata;
+
+ /* MSI-X interrupts are not supported */
+ if (type == PCI_CAP_ID_MSIX)
+ return -EINVAL;
+
+ WARN_ON(!list_is_singular(&pdev->dev.msi_list));
+ desc = list_entry(pdev->dev.msi_list.next, struct msi_desc, list);
+
+ irq = assign_irq(nvec, desc, &pos);
+ if (irq < 0)
+ return irq;
+
+ dw_msi_setup_msg(pp, irq, pos);
+
+ return 0;
+#else
+ return -EINVAL;
+#endif
+}
+
+static void dw_msi_teardown_irq(struct msi_controller *chip, unsigned int irq)
+{
+ struct irq_data *data = irq_get_irq_data(irq);
+ struct msi_desc *msi = irq_data_get_msi_desc(data);
+ struct pcie_port *pp = (struct pcie_port *)msi_desc_to_pci_sysdata(msi);
+
+ clear_irq_range(pp, irq, 1, data->hwirq);
+}
+
+static struct msi_controller dw_pcie_msi_chip = {
+ .setup_irq = dw_msi_setup_irq,
+ .setup_irqs = dw_msi_setup_irqs,
+ .teardown_irq = dw_msi_teardown_irq,
+};
+
+static int dw_pcie_msi_map(struct irq_domain *domain, unsigned int irq,
+ irq_hw_number_t hwirq)
+{
+ irq_set_chip_and_handler(irq, &dw_msi_irq_chip, handle_simple_irq);
+ irq_set_chip_data(irq, domain->host_data);
+
+ return 0;
+}
+
+static const struct irq_domain_ops msi_domain_ops = {
+ .map = dw_pcie_msi_map,
+};
+
+int dw_pcie_host_init(struct pcie_port *pp)
+{
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct device *dev = pci->dev;
+ struct device_node *np = dev->of_node;
+ struct platform_device *pdev = to_platform_device(dev);
+ struct pci_bus *bus, *child;
+ struct resource *cfg_res;
+ int i, ret;
+ LIST_HEAD(res);
+ struct resource_entry *win, *tmp;
+
+ cfg_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "config");
+ if (cfg_res) {
+ pp->cfg0_size = resource_size(cfg_res) / 2;
+ pp->cfg1_size = resource_size(cfg_res) / 2;
+ pp->cfg0_base = cfg_res->start;
+ pp->cfg1_base = cfg_res->start + pp->cfg0_size;
+ } else if (!pp->va_cfg0_base) {
+ dev_err(dev, "missing *config* reg space\n");
+ }
+
+ ret = of_pci_get_host_bridge_resources(np, 0, 0xff, &res, &pp->io_base);
+ if (ret)
+ return ret;
+
+ ret = devm_request_pci_bus_resources(dev, &res);
+ if (ret)
+ goto error;
+
+ /* Get the I/O and memory ranges from DT */
+ resource_list_for_each_entry_safe(win, tmp, &res) {
+ switch (resource_type(win->res)) {
+ case IORESOURCE_IO:
+ ret = pci_remap_iospace(win->res, pp->io_base);
+ if (ret) {
+ dev_warn(dev, "error %d: failed to map resource %pR\n",
+ ret, win->res);
+ resource_list_destroy_entry(win);
+ } else {
+ pp->io = win->res;
+ pp->io->name = "I/O";
+ pp->io_size = resource_size(pp->io);
+ pp->io_bus_addr = pp->io->start - win->offset;
+ }
+ break;
+ case IORESOURCE_MEM:
+ pp->mem = win->res;
+ pp->mem->name = "MEM";
+ pp->mem_size = resource_size(pp->mem);
+ pp->mem_bus_addr = pp->mem->start - win->offset;
+ break;
+ case 0:
+ pp->cfg = win->res;
+ pp->cfg0_size = resource_size(pp->cfg) / 2;
+ pp->cfg1_size = resource_size(pp->cfg) / 2;
+ pp->cfg0_base = pp->cfg->start;
+ pp->cfg1_base = pp->cfg->start + pp->cfg0_size;
+ break;
+ case IORESOURCE_BUS:
+ pp->busn = win->res;
+ break;
+ }
+ }
+
+ if (!pci->dbi_base) {
+ pci->dbi_base = devm_ioremap(dev, pp->cfg->start,
+ resource_size(pp->cfg));
+ if (!pci->dbi_base) {
+ dev_err(dev, "error with ioremap\n");
+ ret = -ENOMEM;
+ goto error;
+ }
+ }
+
+ pp->mem_base = pp->mem->start;
+
+ if (!pp->va_cfg0_base) {
+ pp->va_cfg0_base = devm_ioremap(dev, pp->cfg0_base,
+ pp->cfg0_size);
+ if (!pp->va_cfg0_base) {
+ dev_err(dev, "error with ioremap in function\n");
+ ret = -ENOMEM;
+ goto error;
+ }
+ }
+
+ if (!pp->va_cfg1_base) {
+ pp->va_cfg1_base = devm_ioremap(dev, pp->cfg1_base,
+ pp->cfg1_size);
+ if (!pp->va_cfg1_base) {
+ dev_err(dev, "error with ioremap\n");
+ ret = -ENOMEM;
+ goto error;
+ }
+ }
+
+ ret = of_property_read_u32(np, "num-viewport", &pci->num_viewport);
+ if (ret)
+ pci->num_viewport = 2;
+
+ if (IS_ENABLED(CONFIG_PCI_MSI)) {
+ if (!pp->ops->msi_host_init) {
+ pp->irq_domain = irq_domain_add_linear(dev->of_node,
+ MAX_MSI_IRQS, &msi_domain_ops,
+ &dw_pcie_msi_chip);
+ if (!pp->irq_domain) {
+ dev_err(dev, "irq domain init failed\n");
+ ret = -ENXIO;
+ goto error;
+ }
+
+ for (i = 0; i < MAX_MSI_IRQS; i++)
+ irq_create_mapping(pp->irq_domain, i);
+ } else {
+ ret = pp->ops->msi_host_init(pp, &dw_pcie_msi_chip);
+ if (ret < 0)
+ goto error;
+ }
+ }
+
+ if (pp->ops->host_init)
+ pp->ops->host_init(pp);
+
+ pp->root_bus_nr = pp->busn->start;
+ if (IS_ENABLED(CONFIG_PCI_MSI)) {
+ bus = pci_scan_root_bus_msi(dev, pp->root_bus_nr,
+ &dw_pcie_ops, pp, &res,
+ &dw_pcie_msi_chip);
+ dw_pcie_msi_chip.dev = dev;
+ } else
+ bus = pci_scan_root_bus(dev, pp->root_bus_nr, &dw_pcie_ops,
+ pp, &res);
+ if (!bus) {
+ ret = -ENOMEM;
+ goto error;
+ }
+
+ if (pp->ops->scan_bus)
+ pp->ops->scan_bus(pp);
+
+#ifdef CONFIG_ARM
+ /* support old dtbs that incorrectly describe IRQs */
+ pci_fixup_irqs(pci_common_swizzle, of_irq_parse_and_map_pci);
+#endif
+
+ pci_bus_size_bridges(bus);
+ pci_bus_assign_resources(bus);
+
+ list_for_each_entry(child, &bus->children, node)
+ pcie_bus_configure_settings(child);
+
+ pci_bus_add_devices(bus);
+ return 0;
+
+error:
+ pci_free_resource_list(&res);
+ return ret;
+}
+
+static int dw_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus,
+ u32 devfn, int where, int size, u32 *val)
+{
+ int ret, type;
+ u32 busdev, cfg_size;
+ u64 cpu_addr;
+ void __iomem *va_cfg_base;
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+
+ if (pp->ops->rd_other_conf)
+ return pp->ops->rd_other_conf(pp, bus, devfn, where, size, val);
+
+ busdev = PCIE_ATU_BUS(bus->number) | PCIE_ATU_DEV(PCI_SLOT(devfn)) |
+ PCIE_ATU_FUNC(PCI_FUNC(devfn));
+
+ if (bus->parent->number == pp->root_bus_nr) {
+ type = PCIE_ATU_TYPE_CFG0;
+ cpu_addr = pp->cfg0_base;
+ cfg_size = pp->cfg0_size;
+ va_cfg_base = pp->va_cfg0_base;
+ } else {
+ type = PCIE_ATU_TYPE_CFG1;
+ cpu_addr = pp->cfg1_base;
+ cfg_size = pp->cfg1_size;
+ va_cfg_base = pp->va_cfg1_base;
+ }
+
+ dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1,
+ type, cpu_addr,
+ busdev, cfg_size);
+ ret = dw_pcie_read(va_cfg_base + where, size, val);
+ if (pci->num_viewport <= 2)
+ dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1,
+ PCIE_ATU_TYPE_IO, pp->io_base,
+ pp->io_bus_addr, pp->io_size);
+
+ return ret;
+}
+
+static int dw_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus,
+ u32 devfn, int where, int size, u32 val)
+{
+ int ret, type;
+ u32 busdev, cfg_size;
+ u64 cpu_addr;
+ void __iomem *va_cfg_base;
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+
+ if (pp->ops->wr_other_conf)
+ return pp->ops->wr_other_conf(pp, bus, devfn, where, size, val);
+
+ busdev = PCIE_ATU_BUS(bus->number) | PCIE_ATU_DEV(PCI_SLOT(devfn)) |
+ PCIE_ATU_FUNC(PCI_FUNC(devfn));
+
+ if (bus->parent->number == pp->root_bus_nr) {
+ type = PCIE_ATU_TYPE_CFG0;
+ cpu_addr = pp->cfg0_base;
+ cfg_size = pp->cfg0_size;
+ va_cfg_base = pp->va_cfg0_base;
+ } else {
+ type = PCIE_ATU_TYPE_CFG1;
+ cpu_addr = pp->cfg1_base;
+ cfg_size = pp->cfg1_size;
+ va_cfg_base = pp->va_cfg1_base;
+ }
+
+ dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1,
+ type, cpu_addr,
+ busdev, cfg_size);
+ ret = dw_pcie_write(va_cfg_base + where, size, val);
+ if (pci->num_viewport <= 2)
+ dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1,
+ PCIE_ATU_TYPE_IO, pp->io_base,
+ pp->io_bus_addr, pp->io_size);
+
+ return ret;
+}
+
+static int dw_pcie_valid_device(struct pcie_port *pp, struct pci_bus *bus,
+ int dev)
+{
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+
+ /* If there is no link, then there is no device */
+ if (bus->number != pp->root_bus_nr) {
+ if (!dw_pcie_link_up(pci))
+ return 0;
+ }
+
+ /* access only one slot on each root port */
+ if (bus->number == pp->root_bus_nr && dev > 0)
+ return 0;
+
+ return 1;
+}
+
+static int dw_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
+ int size, u32 *val)
+{
+ struct pcie_port *pp = bus->sysdata;
+
+ if (!dw_pcie_valid_device(pp, bus, PCI_SLOT(devfn))) {
+ *val = 0xffffffff;
+ return PCIBIOS_DEVICE_NOT_FOUND;
+ }
+
+ if (bus->number == pp->root_bus_nr)
+ return dw_pcie_rd_own_conf(pp, where, size, val);
+
+ return dw_pcie_rd_other_conf(pp, bus, devfn, where, size, val);
+}
+
+static int dw_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
+ int where, int size, u32 val)
+{
+ struct pcie_port *pp = bus->sysdata;
+
+ if (!dw_pcie_valid_device(pp, bus, PCI_SLOT(devfn)))
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ if (bus->number == pp->root_bus_nr)
+ return dw_pcie_wr_own_conf(pp, where, size, val);
+
+ return dw_pcie_wr_other_conf(pp, bus, devfn, where, size, val);
+}
+
+static struct pci_ops dw_pcie_ops = {
+ .read = dw_pcie_rd_conf,
+ .write = dw_pcie_wr_conf,
+};
+
+static u8 dw_pcie_iatu_unroll_enabled(struct dw_pcie *pci)
+{
+ u32 val;
+
+ val = dw_pcie_readl_dbi(pci, PCIE_ATU_VIEWPORT);
+ if (val == 0xffffffff)
+ return 1;
+
+ return 0;
+}
+
+void dw_pcie_setup_rc(struct pcie_port *pp)
+{
+ u32 val;
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+
+ dw_pcie_setup(pci);
+
+ /* setup RC BARs */
+ dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_0, 0x00000004);
+ dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_1, 0x00000000);
+
+ /* setup interrupt pins */
+ val = dw_pcie_readl_dbi(pci, PCI_INTERRUPT_LINE);
+ val &= 0xffff00ff;
+ val |= 0x00000100;
+ dw_pcie_writel_dbi(pci, PCI_INTERRUPT_LINE, val);
+
+ /* setup bus numbers */
+ val = dw_pcie_readl_dbi(pci, PCI_PRIMARY_BUS);
+ val &= 0xff000000;
+ val |= 0x00010100;
+ dw_pcie_writel_dbi(pci, PCI_PRIMARY_BUS, val);
+
+ /* setup command register */
+ val = dw_pcie_readl_dbi(pci, PCI_COMMAND);
+ val &= 0xffff0000;
+ val |= PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
+ PCI_COMMAND_MASTER | PCI_COMMAND_SERR;
+ dw_pcie_writel_dbi(pci, PCI_COMMAND, val);
+
+ /*
+ * If the platform provides ->rd_other_conf, it means the platform
+ * uses its own address translation component rather than ATU, so
+ * we should not program the ATU here.
+ */
+ if (!pp->ops->rd_other_conf) {
+ /* get iATU unroll support */
+ pci->iatu_unroll_enabled = dw_pcie_iatu_unroll_enabled(pci);
+ dev_dbg(pci->dev, "iATU unroll: %s\n",
+ pci->iatu_unroll_enabled ? "enabled" : "disabled");
+
+ dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX0,
+ PCIE_ATU_TYPE_MEM, pp->mem_base,
+ pp->mem_bus_addr, pp->mem_size);
+ if (pci->num_viewport > 2)
+ dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX2,
+ PCIE_ATU_TYPE_IO, pp->io_base,
+ pp->io_bus_addr, pp->io_size);
+ }
+
+ dw_pcie_wr_own_conf(pp, PCI_BASE_ADDRESS_0, 4, 0);
+
+ /* program correct class for RC */
+ dw_pcie_wr_own_conf(pp, PCI_CLASS_DEVICE, 2, PCI_CLASS_BRIDGE_PCI);
+
+ dw_pcie_rd_own_conf(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, 4, &val);
+ val |= PORT_LOGIC_SPEED_CHANGE;
+ dw_pcie_wr_own_conf(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, 4, val);
+}
diff --git a/drivers/pci/dwc/pcie-designware.c b/drivers/pci/dwc/pcie-designware.c
index 622d416..7e1fb7d 100644
--- a/drivers/pci/dwc/pcie-designware.c
+++ b/drivers/pci/dwc/pcie-designware.c
@@ -11,17 +11,9 @@
* published by the Free Software Foundation.
*/
-#include <linux/irq.h>
-#include <linux/irqdomain.h>
-#include <linux/kernel.h>
-#include <linux/msi.h>
-#include <linux/of_address.h>
-#include <linux/of_pci.h>
-#include <linux/pci.h>
-#include <linux/pci_regs.h>
-#include <linux/platform_device.h>
-#include <linux/types.h>
#include <linux/delay.h>
+#include <linux/of.h>
+#include <linux/types.h>
#include "pcie-designware.h"
@@ -31,8 +23,6 @@
#define PCIE_PHY_DEBUG_R1_LINK_UP (0x1 << 4)
#define PCIE_PHY_DEBUG_R1_LINK_IN_TRAINING (0x1 << 29)
-static struct pci_ops dw_pcie_ops;
-
int dw_pcie_read(void __iomem *addr, int size, u32 *val)
{
if ((uintptr_t)addr & (size - 1)) {
@@ -102,33 +92,8 @@ static void dw_pcie_writel_unroll(struct dw_pcie *pci, u32 index, u32 reg,
dw_pcie_writel_dbi(pci, offset + reg, val);
}
-static int dw_pcie_rd_own_conf(struct pcie_port *pp, int where, int size,
- u32 *val)
-{
- struct dw_pcie *pci;
-
- if (pp->ops->rd_own_conf)
- return pp->ops->rd_own_conf(pp, where, size, val);
-
- pci = to_dw_pcie_from_pp(pp);
- return dw_pcie_read(pci->dbi_base + where, size, val);
-}
-
-static int dw_pcie_wr_own_conf(struct pcie_port *pp, int where, int size,
- u32 val)
-{
- struct dw_pcie *pci;
-
- if (pp->ops->wr_own_conf)
- return pp->ops->wr_own_conf(pp, where, size, val);
-
- pci = to_dw_pcie_from_pp(pp);
- return dw_pcie_write(pci->dbi_base + where, size, val);
-}
-
-static void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index,
- int type, u64 cpu_addr, u64 pci_addr,
- u32 size)
+void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index, int type,
+ u64 cpu_addr, u64 pci_addr, u32 size)
{
u32 retries, val;
@@ -183,220 +148,6 @@ static void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index,
dev_err(pci->dev, "iATU is not being enabled\n");
}
-static struct irq_chip dw_msi_irq_chip = {
- .name = "PCI-MSI",
- .irq_enable = pci_msi_unmask_irq,
- .irq_disable = pci_msi_mask_irq,
- .irq_mask = pci_msi_mask_irq,
- .irq_unmask = pci_msi_unmask_irq,
-};
-
-/* MSI int handler */
-irqreturn_t dw_handle_msi_irq(struct pcie_port *pp)
-{
- unsigned long val;
- int i, pos, irq;
- irqreturn_t ret = IRQ_NONE;
-
- for (i = 0; i < MAX_MSI_CTRLS; i++) {
- dw_pcie_rd_own_conf(pp, PCIE_MSI_INTR0_STATUS + i * 12, 4,
- (u32 *)&val);
- if (val) {
- ret = IRQ_HANDLED;
- pos = 0;
- while ((pos = find_next_bit(&val, 32, pos)) != 32) {
- irq = irq_find_mapping(pp->irq_domain,
- i * 32 + pos);
- dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_STATUS +
- i * 12, 4, 1 << pos);
- generic_handle_irq(irq);
- pos++;
- }
- }
- }
-
- return ret;
-}
-
-void dw_pcie_msi_init(struct pcie_port *pp)
-{
- u64 msi_target;
-
- pp->msi_data = __get_free_pages(GFP_KERNEL, 0);
- msi_target = virt_to_phys((void *)pp->msi_data);
-
- /* program the msi_data */
- dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_LO, 4,
- (u32)(msi_target & 0xffffffff));
- dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_HI, 4,
- (u32)(msi_target >> 32 & 0xffffffff));
-}
-
-static void dw_pcie_msi_clear_irq(struct pcie_port *pp, int irq)
-{
- unsigned int res, bit, val;
-
- res = (irq / 32) * 12;
- bit = irq % 32;
- dw_pcie_rd_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4, &val);
- val &= ~(1 << bit);
- dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4, val);
-}
-
-static void clear_irq_range(struct pcie_port *pp, unsigned int irq_base,
- unsigned int nvec, unsigned int pos)
-{
- unsigned int i;
-
- for (i = 0; i < nvec; i++) {
- irq_set_msi_desc_off(irq_base, i, NULL);
- /* Disable corresponding interrupt on MSI controller */
- if (pp->ops->msi_clear_irq)
- pp->ops->msi_clear_irq(pp, pos + i);
- else
- dw_pcie_msi_clear_irq(pp, pos + i);
- }
-
- bitmap_release_region(pp->msi_irq_in_use, pos, order_base_2(nvec));
-}
-
-static void dw_pcie_msi_set_irq(struct pcie_port *pp, int irq)
-{
- unsigned int res, bit, val;
-
- res = (irq / 32) * 12;
- bit = irq % 32;
- dw_pcie_rd_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4, &val);
- val |= 1 << bit;
- dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4, val);
-}
-
-static int assign_irq(int no_irqs, struct msi_desc *desc, int *pos)
-{
- int irq, pos0, i;
- struct pcie_port *pp;
-
- pp = (struct pcie_port *)msi_desc_to_pci_sysdata(desc);
- pos0 = bitmap_find_free_region(pp->msi_irq_in_use, MAX_MSI_IRQS,
- order_base_2(no_irqs));
- if (pos0 < 0)
- goto no_valid_irq;
-
- irq = irq_find_mapping(pp->irq_domain, pos0);
- if (!irq)
- goto no_valid_irq;
-
- /*
- * irq_create_mapping (called from dw_pcie_host_init) pre-allocates
- * descs so there is no need to allocate descs here. We can therefore
- * assume that if irq_find_mapping above returns non-zero, then the
- * descs are also successfully allocated.
- */
-
- for (i = 0; i < no_irqs; i++) {
- if (irq_set_msi_desc_off(irq, i, desc) != 0) {
- clear_irq_range(pp, irq, i, pos0);
- goto no_valid_irq;
- }
- /*Enable corresponding interrupt in MSI interrupt controller */
- if (pp->ops->msi_set_irq)
- pp->ops->msi_set_irq(pp, pos0 + i);
- else
- dw_pcie_msi_set_irq(pp, pos0 + i);
- }
-
- *pos = pos0;
- desc->nvec_used = no_irqs;
- desc->msi_attrib.multiple = order_base_2(no_irqs);
-
- return irq;
-
-no_valid_irq:
- *pos = pos0;
- return -ENOSPC;
-}
-
-static void dw_msi_setup_msg(struct pcie_port *pp, unsigned int irq, u32 pos)
-{
- struct msi_msg msg;
- u64 msi_target;
-
- if (pp->ops->get_msi_addr)
- msi_target = pp->ops->get_msi_addr(pp);
- else
- msi_target = virt_to_phys((void *)pp->msi_data);
-
- msg.address_lo = (u32)(msi_target & 0xffffffff);
- msg.address_hi = (u32)(msi_target >> 32 & 0xffffffff);
-
- if (pp->ops->get_msi_data)
- msg.data = pp->ops->get_msi_data(pp, pos);
- else
- msg.data = pos;
-
- pci_write_msi_msg(irq, &msg);
-}
-
-static int dw_msi_setup_irq(struct msi_controller *chip, struct pci_dev *pdev,
- struct msi_desc *desc)
-{
- int irq, pos;
- struct pcie_port *pp = pdev->bus->sysdata;
-
- if (desc->msi_attrib.is_msix)
- return -EINVAL;
-
- irq = assign_irq(1, desc, &pos);
- if (irq < 0)
- return irq;
-
- dw_msi_setup_msg(pp, irq, pos);
-
- return 0;
-}
-
-static int dw_msi_setup_irqs(struct msi_controller *chip, struct pci_dev *pdev,
- int nvec, int type)
-{
-#ifdef CONFIG_PCI_MSI
- int irq, pos;
- struct msi_desc *desc;
- struct pcie_port *pp = pdev->bus->sysdata;
-
- /* MSI-X interrupts are not supported */
- if (type == PCI_CAP_ID_MSIX)
- return -EINVAL;
-
- WARN_ON(!list_is_singular(&pdev->dev.msi_list));
- desc = list_entry(pdev->dev.msi_list.next, struct msi_desc, list);
-
- irq = assign_irq(nvec, desc, &pos);
- if (irq < 0)
- return irq;
-
- dw_msi_setup_msg(pp, irq, pos);
-
- return 0;
-#else
- return -EINVAL;
-#endif
-}
-
-static void dw_msi_teardown_irq(struct msi_controller *chip, unsigned int irq)
-{
- struct irq_data *data = irq_get_irq_data(irq);
- struct msi_desc *msi = irq_data_get_msi_desc(data);
- struct pcie_port *pp = (struct pcie_port *)msi_desc_to_pci_sysdata(msi);
-
- clear_irq_range(pp, irq, 1, data->hwirq);
-}
-
-static struct msi_controller dw_pcie_msi_chip = {
- .setup_irq = dw_msi_setup_irq,
- .setup_irqs = dw_msi_setup_irqs,
- .teardown_irq = dw_msi_teardown_irq,
-};
-
int dw_pcie_wait_for_link(struct dw_pcie *pci)
{
int retries;
@@ -427,327 +178,11 @@ int dw_pcie_link_up(struct dw_pcie *pci)
(!(val & PCIE_PHY_DEBUG_R1_LINK_IN_TRAINING)));
}
-static int dw_pcie_msi_map(struct irq_domain *domain, unsigned int irq,
- irq_hw_number_t hwirq)
-{
- irq_set_chip_and_handler(irq, &dw_msi_irq_chip, handle_simple_irq);
- irq_set_chip_data(irq, domain->host_data);
-
- return 0;
-}
-
-static const struct irq_domain_ops msi_domain_ops = {
- .map = dw_pcie_msi_map,
-};
-
-static u8 dw_pcie_iatu_unroll_enabled(struct dw_pcie *pci)
-{
- u32 val;
-
- val = dw_pcie_readl_dbi(pci, PCIE_ATU_VIEWPORT);
- if (val == 0xffffffff)
- return 1;
-
- return 0;
-}
-
-int dw_pcie_host_init(struct pcie_port *pp)
-{
- struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
- struct device *dev = pci->dev;
- struct device_node *np = dev->of_node;
- struct platform_device *pdev = to_platform_device(dev);
- struct pci_bus *bus, *child;
- struct resource *cfg_res;
- int i, ret;
- LIST_HEAD(res);
- struct resource_entry *win, *tmp;
-
- cfg_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "config");
- if (cfg_res) {
- pp->cfg0_size = resource_size(cfg_res) / 2;
- pp->cfg1_size = resource_size(cfg_res) / 2;
- pp->cfg0_base = cfg_res->start;
- pp->cfg1_base = cfg_res->start + pp->cfg0_size;
- } else if (!pp->va_cfg0_base) {
- dev_err(dev, "missing *config* reg space\n");
- }
-
- ret = of_pci_get_host_bridge_resources(np, 0, 0xff, &res, &pp->io_base);
- if (ret)
- return ret;
-
- ret = devm_request_pci_bus_resources(dev, &res);
- if (ret)
- goto error;
-
- /* Get the I/O and memory ranges from DT */
- resource_list_for_each_entry_safe(win, tmp, &res) {
- switch (resource_type(win->res)) {
- case IORESOURCE_IO:
- ret = pci_remap_iospace(win->res, pp->io_base);
- if (ret) {
- dev_warn(dev, "error %d: failed to map resource %pR\n",
- ret, win->res);
- resource_list_destroy_entry(win);
- } else {
- pp->io = win->res;
- pp->io->name = "I/O";
- pp->io_size = resource_size(pp->io);
- pp->io_bus_addr = pp->io->start - win->offset;
- }
- break;
- case IORESOURCE_MEM:
- pp->mem = win->res;
- pp->mem->name = "MEM";
- pp->mem_size = resource_size(pp->mem);
- pp->mem_bus_addr = pp->mem->start - win->offset;
- break;
- case 0:
- pp->cfg = win->res;
- pp->cfg0_size = resource_size(pp->cfg) / 2;
- pp->cfg1_size = resource_size(pp->cfg) / 2;
- pp->cfg0_base = pp->cfg->start;
- pp->cfg1_base = pp->cfg->start + pp->cfg0_size;
- break;
- case IORESOURCE_BUS:
- pp->busn = win->res;
- break;
- }
- }
-
- if (!pci->dbi_base) {
- pci->dbi_base = devm_ioremap(dev, pp->cfg->start,
- resource_size(pp->cfg));
- if (!pci->dbi_base) {
- dev_err(dev, "error with ioremap\n");
- ret = -ENOMEM;
- goto error;
- }
- }
-
- pp->mem_base = pp->mem->start;
-
- if (!pp->va_cfg0_base) {
- pp->va_cfg0_base = devm_ioremap(dev, pp->cfg0_base,
- pp->cfg0_size);
- if (!pp->va_cfg0_base) {
- dev_err(dev, "error with ioremap in function\n");
- ret = -ENOMEM;
- goto error;
- }
- }
-
- if (!pp->va_cfg1_base) {
- pp->va_cfg1_base = devm_ioremap(dev, pp->cfg1_base,
- pp->cfg1_size);
- if (!pp->va_cfg1_base) {
- dev_err(dev, "error with ioremap\n");
- ret = -ENOMEM;
- goto error;
- }
- }
-
- ret = of_property_read_u32(np, "num-viewport", &pci->num_viewport);
- if (ret)
- pci->num_viewport = 2;
-
- if (IS_ENABLED(CONFIG_PCI_MSI)) {
- if (!pp->ops->msi_host_init) {
- pp->irq_domain = irq_domain_add_linear(dev->of_node,
- MAX_MSI_IRQS, &msi_domain_ops,
- &dw_pcie_msi_chip);
- if (!pp->irq_domain) {
- dev_err(dev, "irq domain init failed\n");
- ret = -ENXIO;
- goto error;
- }
-
- for (i = 0; i < MAX_MSI_IRQS; i++)
- irq_create_mapping(pp->irq_domain, i);
- } else {
- ret = pp->ops->msi_host_init(pp, &dw_pcie_msi_chip);
- if (ret < 0)
- goto error;
- }
- }
-
- if (pp->ops->host_init)
- pp->ops->host_init(pp);
-
- pp->root_bus_nr = pp->busn->start;
- if (IS_ENABLED(CONFIG_PCI_MSI)) {
- bus = pci_scan_root_bus_msi(dev, pp->root_bus_nr,
- &dw_pcie_ops, pp, &res,
- &dw_pcie_msi_chip);
- dw_pcie_msi_chip.dev = dev;
- } else
- bus = pci_scan_root_bus(dev, pp->root_bus_nr, &dw_pcie_ops,
- pp, &res);
- if (!bus) {
- ret = -ENOMEM;
- goto error;
- }
-
- if (pp->ops->scan_bus)
- pp->ops->scan_bus(pp);
-
-#ifdef CONFIG_ARM
- /* support old dtbs that incorrectly describe IRQs */
- pci_fixup_irqs(pci_common_swizzle, of_irq_parse_and_map_pci);
-#endif
-
- pci_bus_size_bridges(bus);
- pci_bus_assign_resources(bus);
-
- list_for_each_entry(child, &bus->children, node)
- pcie_bus_configure_settings(child);
-
- pci_bus_add_devices(bus);
- return 0;
-
-error:
- pci_free_resource_list(&res);
- return ret;
-}
-
-static int dw_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus,
- u32 devfn, int where, int size, u32 *val)
-{
- int ret, type;
- u32 busdev, cfg_size;
- u64 cpu_addr;
- void __iomem *va_cfg_base;
- struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
-
- if (pp->ops->rd_other_conf)
- return pp->ops->rd_other_conf(pp, bus, devfn, where, size, val);
-
- busdev = PCIE_ATU_BUS(bus->number) | PCIE_ATU_DEV(PCI_SLOT(devfn)) |
- PCIE_ATU_FUNC(PCI_FUNC(devfn));
-
- if (bus->parent->number == pp->root_bus_nr) {
- type = PCIE_ATU_TYPE_CFG0;
- cpu_addr = pp->cfg0_base;
- cfg_size = pp->cfg0_size;
- va_cfg_base = pp->va_cfg0_base;
- } else {
- type = PCIE_ATU_TYPE_CFG1;
- cpu_addr = pp->cfg1_base;
- cfg_size = pp->cfg1_size;
- va_cfg_base = pp->va_cfg1_base;
- }
-
- dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1,
- type, cpu_addr,
- busdev, cfg_size);
- ret = dw_pcie_read(va_cfg_base + where, size, val);
- if (pci->num_viewport <= 2)
- dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1,
- PCIE_ATU_TYPE_IO, pp->io_base,
- pp->io_bus_addr, pp->io_size);
-
- return ret;
-}
-
-static int dw_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus,
- u32 devfn, int where, int size, u32 val)
-{
- int ret, type;
- u32 busdev, cfg_size;
- u64 cpu_addr;
- void __iomem *va_cfg_base;
- struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
-
- if (pp->ops->wr_other_conf)
- return pp->ops->wr_other_conf(pp, bus, devfn, where, size, val);
-
- busdev = PCIE_ATU_BUS(bus->number) | PCIE_ATU_DEV(PCI_SLOT(devfn)) |
- PCIE_ATU_FUNC(PCI_FUNC(devfn));
-
- if (bus->parent->number == pp->root_bus_nr) {
- type = PCIE_ATU_TYPE_CFG0;
- cpu_addr = pp->cfg0_base;
- cfg_size = pp->cfg0_size;
- va_cfg_base = pp->va_cfg0_base;
- } else {
- type = PCIE_ATU_TYPE_CFG1;
- cpu_addr = pp->cfg1_base;
- cfg_size = pp->cfg1_size;
- va_cfg_base = pp->va_cfg1_base;
- }
-
- dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1,
- type, cpu_addr,
- busdev, cfg_size);
- ret = dw_pcie_write(va_cfg_base + where, size, val);
- if (pci->num_viewport <= 2)
- dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1,
- PCIE_ATU_TYPE_IO, pp->io_base,
- pp->io_bus_addr, pp->io_size);
-
- return ret;
-}
-
-static int dw_pcie_valid_device(struct pcie_port *pp, struct pci_bus *bus,
- int dev)
-{
- struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
-
- /* If there is no link, then there is no device */
- if (bus->number != pp->root_bus_nr) {
- if (!dw_pcie_link_up(pci))
- return 0;
- }
-
- /* access only one slot on each root port */
- if (bus->number == pp->root_bus_nr && dev > 0)
- return 0;
-
- return 1;
-}
-
-static int dw_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
- int size, u32 *val)
-{
- struct pcie_port *pp = bus->sysdata;
-
- if (!dw_pcie_valid_device(pp, bus, PCI_SLOT(devfn))) {
- *val = 0xffffffff;
- return PCIBIOS_DEVICE_NOT_FOUND;
- }
-
- if (bus->number == pp->root_bus_nr)
- return dw_pcie_rd_own_conf(pp, where, size, val);
-
- return dw_pcie_rd_other_conf(pp, bus, devfn, where, size, val);
-}
-
-static int dw_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
- int where, int size, u32 val)
-{
- struct pcie_port *pp = bus->sysdata;
-
- if (!dw_pcie_valid_device(pp, bus, PCI_SLOT(devfn)))
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- if (bus->number == pp->root_bus_nr)
- return dw_pcie_wr_own_conf(pp, where, size, val);
-
- return dw_pcie_wr_other_conf(pp, bus, devfn, where, size, val);
-}
-
-static struct pci_ops dw_pcie_ops = {
- .read = dw_pcie_rd_conf,
- .write = dw_pcie_wr_conf,
-};
-
-void dw_pcie_setup_rc(struct pcie_port *pp)
+void dw_pcie_setup(struct dw_pcie *pci)
{
int ret;
- u32 lanes;
u32 val;
- struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ u32 lanes;
struct device *dev = pci->dev;
struct device_node *np = dev->of_node;
@@ -795,56 +230,4 @@ void dw_pcie_setup_rc(struct pcie_port *pp)
break;
}
dw_pcie_writel_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL, val);
-
- /* setup RC BARs */
- dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_0, 0x00000004);
- dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_1, 0x00000000);
-
- /* setup interrupt pins */
- val = dw_pcie_readl_dbi(pci, PCI_INTERRUPT_LINE);
- val &= 0xffff00ff;
- val |= 0x00000100;
- dw_pcie_writel_dbi(pci, PCI_INTERRUPT_LINE, val);
-
- /* setup bus numbers */
- val = dw_pcie_readl_dbi(pci, PCI_PRIMARY_BUS);
- val &= 0xff000000;
- val |= 0x00010100;
- dw_pcie_writel_dbi(pci, PCI_PRIMARY_BUS, val);
-
- /* setup command register */
- val = dw_pcie_readl_dbi(pci, PCI_COMMAND);
- val &= 0xffff0000;
- val |= PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
- PCI_COMMAND_MASTER | PCI_COMMAND_SERR;
- dw_pcie_writel_dbi(pci, PCI_COMMAND, val);
-
- /*
- * If the platform provides ->rd_other_conf, it means the platform
- * uses its own address translation component rather than ATU, so
- * we should not program the ATU here.
- */
- if (!pp->ops->rd_other_conf) {
- /* get iATU unroll support */
- pci->iatu_unroll_enabled = dw_pcie_iatu_unroll_enabled(pci);
- dev_dbg(pci->dev, "iATU unroll: %s\n",
- pci->iatu_unroll_enabled ? "enabled" : "disabled");
-
- dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX0,
- PCIE_ATU_TYPE_MEM, pp->mem_base,
- pp->mem_bus_addr, pp->mem_size);
- if (pci->num_viewport > 2)
- dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX2,
- PCIE_ATU_TYPE_IO, pp->io_base,
- pp->io_bus_addr, pp->io_size);
- }
-
- dw_pcie_wr_own_conf(pp, PCI_BASE_ADDRESS_0, 4, 0);
-
- /* program correct class for RC */
- dw_pcie_wr_own_conf(pp, PCI_CLASS_DEVICE, 2, PCI_CLASS_BRIDGE_PCI);
-
- dw_pcie_rd_own_conf(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, 4, &val);
- val |= PORT_LOGIC_SPEED_CHANGE;
- dw_pcie_wr_own_conf(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, 4, val);
}
diff --git a/drivers/pci/dwc/pcie-designware.h b/drivers/pci/dwc/pcie-designware.h
index 1fbe3b8..3054770 100644
--- a/drivers/pci/dwc/pcie-designware.h
+++ b/drivers/pci/dwc/pcie-designware.h
@@ -14,6 +14,10 @@
#ifndef _PCIE_DESIGNWARE_H
#define _PCIE_DESIGNWARE_H
+#include <linux/irq.h>
+#include <linux/msi.h>
+#include <linux/pci.h>
+
/* Parameters for the waiting for link up routine */
#define LINK_WAIT_MAX_RETRIES 10
#define LINK_WAIT_USLEEP_MIN 90000
@@ -166,4 +170,8 @@ struct dw_pcie {
void dw_pcie_writel_dbi(struct dw_pcie *pci, u32 reg, u32 val);
int dw_pcie_link_up(struct dw_pcie *pci);
int dw_pcie_wait_for_link(struct dw_pcie *pci);
+void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index,
+ int type, u64 cpu_addr, u64 pci_addr,
+ u32 size);
+void dw_pcie_setup(struct dw_pcie *pci);
#endif /* _PCIE_DESIGNWARE_H */
--
1.7.9.5
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