This patch tries to unify ARM32 and ARM64 PCIe in designware driver. Delete
function dw_pcie_setup, dw_pcie_scan_bus, dw_pcie_map_irq and struct hw_pci,
move related operations to dw_pcie_host_init.
Signed-off-by: Zhou Wang <wangzhou1@xxxxxxxxxxxxx>
Signed-off-by: Gabriele Paoloni <gabriele.paoloni@xxxxxxxxxx>
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Tested-by: James Morse <james.morse@xxxxxxx>
Tested-by: Gabriel Fernandez <gabriel.fernandez@xxxxxx>
Tested-by: Minghuan Lian <Minghuan.Lian@xxxxxxxxxxxxx>
Acked-by: Pratyush Anand <pratyush.anand@xxxxxxxxx>
---
drivers/pci/host/pcie-designware.c | 127 +++++++++++--------------------------
1 file changed, 38 insertions(+), 89 deletions(-)
diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c
index b914424..0af1432 100644
--- a/drivers/pci/host/pcie-designware.c
+++ b/drivers/pci/host/pcie-designware.c
@@ -69,16 +69,7 @@
#define PCIE_ATU_FUNC(x) (((x) & 0x7) << 16)
#define PCIE_ATU_UPPER_TARGET 0x91C
-static struct hw_pci dw_pci;
-
-static unsigned long global_io_offset;
-
-static inline struct pcie_port *sys_to_pcie(struct pci_sys_data *sys)
-{
- BUG_ON(!sys->private_data);
-
- return sys->private_data;
-}
+static struct pci_ops dw_pcie_ops;
int dw_pcie_cfg_read(void __iomem *addr, int where, int size, u32 *val)
{
@@ -255,7 +246,7 @@ static void dw_pcie_msi_set_irq(struct pcie_port *pp, int irq)
static int assign_irq(int no_irqs, struct msi_desc *desc, int *pos)
{
int irq, pos0, i;
- struct pcie_port *pp = sys_to_pcie(msi_desc_to_pci_sysdata(desc));
+ struct pcie_port *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));
@@ -298,7 +289,7 @@ static int dw_msi_setup_irq(struct msi_controller *chip, struct pci_dev *pdev,
{
int irq, pos;
struct msi_msg msg;
- struct pcie_port *pp = sys_to_pcie(pdev->bus->sysdata);
+ struct pcie_port *pp = pdev->bus->sysdata;
if (desc->msi_attrib.is_msix)
return -EINVAL;
@@ -327,7 +318,7 @@ 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 = sys_to_pcie(msi_desc_to_pci_sysdata(msi));
+ struct pcie_port *pp = (struct pcie_port *) msi_desc_to_pci_sysdata(msi);
clear_irq_range(pp, irq, 1, data->hwirq);
}
@@ -362,6 +353,7 @@ int dw_pcie_host_init(struct pcie_port *pp)
{
struct device_node *np = pp->dev->of_node;
struct platform_device *pdev = to_platform_device(pp->dev);
+ struct pci_bus *bus, *child;
struct resource *cfg_res;
u32 val, ns;
const __be32 *addrp;
@@ -399,12 +391,12 @@ int dw_pcie_host_init(struct pcie_port *pp)
pp->io->name = "I/O";
pp->io_size = resource_size(pp->io);
pp->io_bus_addr = pp->io->start - win->offset;
- pp->io->start = max_t(resource_size_t, PCIBIOS_MIN_IO,
- pp->io_bus_addr +
- global_io_offset);
- pp->io->end = min_t(resource_size_t, IO_SPACE_LIMIT,
- pp->io_bus_addr + pp->io_size +
- global_io_offset - 1);
+ ret = pci_remap_iospace(pp->io, pp->io_base);
+ if (ret) {
+ dev_warn(pp->dev, "error %d: failed to map resource %pR\n",
+ ret, pp->io);
+ continue;
+ }
pp->io_base = pp->io->start;
/* Find the untranslated IO space address */
@@ -508,15 +500,35 @@ int dw_pcie_host_init(struct pcie_port *pp)
val |= PORT_LOGIC_SPEED_CHANGE;
dw_pcie_wr_own_conf(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, 4, val);
-#ifdef CONFIG_PCI_MSI
- dw_pcie_msi_chip.dev = pp->dev;
+ pp->root_bus_nr = pp->busn->start;
+ if (IS_ENABLED(CONFIG_PCI_MSI)) {
+ bus = pci_scan_root_bus_msi(pp->dev, pp->root_bus_nr,
+ &dw_pcie_ops, pp, &res,
+ &dw_pcie_msi_chip);
+ dw_pcie_msi_chip.dev = pp->dev;
+ } else
+ bus = pci_scan_root_bus(pp->dev, pp->root_bus_nr, &dw_pcie_ops,
+ pp, &res);
+ if (!bus)
+ return -ENOMEM;
+
+ 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
- dw_pci.nr_controllers = 1;
- dw_pci.private_data = (void **)&pp;
+ if (!pci_has_flag(PCI_PROBE_ONLY)) {
+ pci_bus_size_bridges(bus);
+ pci_bus_assign_resources(bus);
- pci_common_init_dev(pp->dev, &dw_pci);
+ list_for_each_entry(child, &bus->children, node)
+ pcie_bus_configure_settings(child);
+ }
+ pci_bus_add_devices(bus);
return 0;
}
@@ -616,7 +628,7 @@ static int dw_pcie_valid_config(struct pcie_port *pp,
static int dw_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
int size, u32 *val)
{
- struct pcie_port *pp = sys_to_pcie(bus->sysdata);
+ struct pcie_port *pp = bus->sysdata;
int ret;
if (dw_pcie_valid_config(pp, bus, PCI_SLOT(devfn)) == 0) {
@@ -640,7 +652,7 @@ static int dw_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
static int dw_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
int where, int size, u32 val)
{
- struct pcie_port *pp = sys_to_pcie(bus->sysdata);
+ struct pcie_port *pp = bus->sysdata;
int ret;
if (dw_pcie_valid_config(pp, bus, PCI_SLOT(devfn)) == 0)
@@ -664,69 +676,6 @@ static struct pci_ops dw_pcie_ops = {
.write = dw_pcie_wr_conf,
};
-static int dw_pcie_setup(int nr, struct pci_sys_data *sys)
-{
- struct pcie_port *pp;
-
- pp = sys_to_pcie(sys);
-
- if (global_io_offset < SZ_1M && pp->io_size > 0) {
- sys->io_offset = global_io_offset - pp->io_bus_addr;
- pci_ioremap_io(global_io_offset, pp->io_base);
- global_io_offset += SZ_64K;
- pci_add_resource_offset(&sys->resources, pp->io,
- sys->io_offset);
- }
-
- sys->mem_offset = pp->mem->start - pp->mem_bus_addr;
- pci_add_resource_offset(&sys->resources, pp->mem, sys->mem_offset);
- pci_add_resource(&sys->resources, pp->busn);
-
- return 1;
-}
-
-static struct pci_bus *dw_pcie_scan_bus(int nr, struct pci_sys_data *sys)
-{
- struct pci_bus *bus;
- struct pcie_port *pp = sys_to_pcie(sys);
-
- pp->root_bus_nr = sys->busnr;
-
- if (IS_ENABLED(CONFIG_PCI_MSI))
- bus = pci_scan_root_bus_msi(pp->dev, sys->busnr, &dw_pcie_ops,
- sys, &sys->resources,
- &dw_pcie_msi_chip);
- else
- bus = pci_scan_root_bus(pp->dev, sys->busnr, &dw_pcie_ops,
- sys, &sys->resources);
-
- if (!bus)
- return NULL;
-
- if (bus && pp->ops->scan_bus)
- pp->ops->scan_bus(pp);
-
- return bus;
-}
-
-static int dw_pcie_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
-{
- struct pcie_port *pp = sys_to_pcie(dev->bus->sysdata);
- int irq;
-
- irq = of_irq_parse_and_map_pci(dev, slot, pin);
- if (!irq)
- irq = pp->irq;
-
- return irq;
-}
-
-static struct hw_pci dw_pci = {
- .setup = dw_pcie_setup,
- .scan = dw_pcie_scan_bus,
- .map_irq = dw_pcie_map_irq,
-};
-
void dw_pcie_setup_rc(struct pcie_port *pp)
{
u32 val;
--
1.9.1
--
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