/* SPDX-License-Identifier: GPL-2.0-only */ /* * Derived from Cavium's BSD-3 Clause OCTEONTX-SDK-6.2.0. */ #define __SIMPLE_DEVICE__ #include <device/pci_ops.h> #include <device/pci.h> #include <soc/addressmap.h> #include <soc/ecam.h> /** * Get PCI BAR address from cavium specific extended capability. * Use regular BAR if not found in extended capability space. * * @return The physical address of the BAR, zero on error */ uint64_t ecam0_get_bar_val(pci_devfn_t dev, u8 bar) { size_t cap_offset = pci_s_find_capability(dev, 0x14); uint64_t h, l, ret = 0; if (cap_offset) { /* Found EA */ u8 es, bei; u8 ne = pci_read_config8(dev, cap_offset + 2) & 0x3f; cap_offset += 4; while (ne) { uint32_t dw0 = pci_read_config32(dev, cap_offset); es = dw0 & 7; bei = (dw0 >> 4) & 0xf; if (bei == bar) { h = 0; l = pci_read_config32(dev, cap_offset + 4); if (l & 2) h = pci_read_config32(dev, cap_offset + 12); ret = (h << 32) | (l & ~0xfull); break; } cap_offset += (es + 1) * 4; ne--; } } else { h = 0; l = pci_read_config32(dev, bar * 4 + PCI_BASE_ADDRESS_0); if (l & 4) h = pci_read_config32(dev, bar * 4 + PCI_BASE_ADDRESS_0 + 4); ret = (h << 32) | (l & ~0xfull); } return ret; }