diff options
Diffstat (limited to 'drivers/pci/pcie_ecam_generic.c')
| -rw-r--r-- | drivers/pci/pcie_ecam_generic.c | 37 |
1 files changed, 33 insertions, 4 deletions
diff --git a/drivers/pci/pcie_ecam_generic.c b/drivers/pci/pcie_ecam_generic.c index c875f3a5b7..890b6a8fb6 100644 --- a/drivers/pci/pcie_ecam_generic.c +++ b/drivers/pci/pcie_ecam_generic.c @@ -19,6 +19,8 @@ */ struct generic_ecam_pcie { void *cfg_base; + pci_size_t size; + int first_busno; }; /** @@ -43,7 +45,7 @@ static int pci_generic_ecam_conf_address(const struct udevice *bus, void *addr; addr = pcie->cfg_base; - addr += PCI_BUS(bdf) << 20; + addr += (PCI_BUS(bdf) - pcie->first_busno) << 20; addr += PCI_DEV(bdf) << 15; addr += PCI_FUNC(bdf) << 12; addr += offset; @@ -52,6 +54,16 @@ static int pci_generic_ecam_conf_address(const struct udevice *bus, return 0; } +static bool pci_generic_ecam_addr_valid(const struct udevice *bus, + pci_dev_t bdf) +{ + struct generic_ecam_pcie *pcie = dev_get_priv(bus); + int num_buses = DIV_ROUND_UP(pcie->size, 1 << 16); + + return (PCI_BUS(bdf) >= pcie->first_busno && + PCI_BUS(bdf) < pcie->first_busno + num_buses); +} + /** * pci_generic_ecam_read_config() - Read from configuration space * @bus: Pointer to the PCI bus @@ -68,6 +80,11 @@ static int pci_generic_ecam_read_config(const struct udevice *bus, pci_dev_t bdf, uint offset, ulong *valuep, enum pci_size_t size) { + if (!pci_generic_ecam_addr_valid(bus, bdf)) { + *valuep = pci_get_ff(size); + return 0; + } + return pci_generic_mmap_read_config(bus, pci_generic_ecam_conf_address, bdf, offset, valuep, size); } @@ -88,6 +105,9 @@ static int pci_generic_ecam_write_config(struct udevice *bus, pci_dev_t bdf, uint offset, ulong value, enum pci_size_t size) { + if (!pci_generic_ecam_addr_valid(bus, bdf)) + return 0; + return pci_generic_mmap_write_config(bus, pci_generic_ecam_conf_address, bdf, offset, value, size); } @@ -116,9 +136,17 @@ static int pci_generic_ecam_ofdata_to_platdata(struct udevice *dev) return err; } - pcie->cfg_base = map_physmem(reg_res.start, - fdt_resource_size(®_res), - MAP_NOCACHE); + pcie->size = fdt_resource_size(®_res); + pcie->cfg_base = map_physmem(reg_res.start, pcie->size, MAP_NOCACHE); + + return 0; +} + +static int pci_generic_ecam_probe(struct udevice *dev) +{ + struct generic_ecam_pcie *pcie = dev_get_priv(dev); + + pcie->first_busno = dev->seq; return 0; } @@ -138,6 +166,7 @@ U_BOOT_DRIVER(pci_generic_ecam) = { .id = UCLASS_PCI, .of_match = pci_generic_ecam_ids, .ops = &pci_generic_ecam_ops, + .probe = pci_generic_ecam_probe, .ofdata_to_platdata = pci_generic_ecam_ofdata_to_platdata, .priv_auto_alloc_size = sizeof(struct generic_ecam_pcie), }; |