| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <acpi/acpi_device.h> |
| #include <amdblocks/data_fabric.h> |
| #include <amdblocks/pci_devs.h> |
| #include <console/console.h> |
| #include <device/pci_ops.h> |
| #include <soc/data_fabric.h> |
| #include <soc/pci_devs.h> |
| #include <types.h> |
| |
| static void data_fabric_set_indirect_address(uint16_t fn_reg, uint8_t instance_id) |
| { |
| union df_ficaa ficaa = { .cfg_inst_acc_en = 1 }; /* target only specific instance */ |
| /* convert register address to 32-bit register number */ |
| ficaa.reg_num = DF_REG_OFFSET(fn_reg) >> 2; |
| ficaa.func_num = DF_REG_FN(fn_reg); |
| ficaa.inst_id = instance_id; |
| data_fabric_broadcast_write32(DF_FICAA_BIOS, ficaa.raw); |
| } |
| |
| uint32_t data_fabric_read32(uint16_t fn_reg, uint8_t instance_id) |
| { |
| /* Broadcast reads might return unexpected results when a register has different |
| contents in the different instances. */ |
| if (instance_id == BROADCAST_FABRIC_ID) |
| return data_fabric_broadcast_read32(fn_reg); |
| |
| /* non-broadcast data fabric accesses need to be done via indirect access */ |
| data_fabric_set_indirect_address(fn_reg, instance_id); |
| return data_fabric_broadcast_read32(DF_FICAD_LO); |
| } |
| |
| void data_fabric_write32(uint16_t fn_reg, uint8_t instance_id, uint32_t data) |
| { |
| if (instance_id == BROADCAST_FABRIC_ID) { |
| data_fabric_broadcast_write32(fn_reg, data); |
| return; |
| } |
| |
| /* non-broadcast data fabric accesses need to be done via indirect access */ |
| data_fabric_set_indirect_address(fn_reg, instance_id); |
| data_fabric_broadcast_write32(DF_FICAD_LO, data); |
| } |
| |
| void data_fabric_print_mmio_conf(void) |
| { |
| union df_mmio_control control; |
| uint64_t base, limit; |
| printk(BIOS_SPEW, |
| "=== Data Fabric MMIO configuration registers ===\n" |
| "idx base limit control R W NP F-ID\n"); |
| for (unsigned int i = 0; i < DF_MMIO_REG_SET_COUNT; i++) { |
| control.raw = data_fabric_broadcast_read32(DF_MMIO_CONTROL(i)); |
| data_fabric_get_mmio_base_size(i, &base, &limit); |
| printk(BIOS_SPEW, " %2u %16llx %16llx %8x %s %s %s %4x\n", |
| i, base, limit, control.raw, |
| control.re ? "x" : " ", |
| control.we ? "x" : " ", |
| control.np ? "x" : " ", |
| control.dst_fabric_id); |
| } |
| } |
| |
| #if CONFIG(HAVE_ACPI_TABLES) |
| static const char *data_fabric_acpi_name(const struct device *dev) |
| { |
| const char *df_acpi_names[8] = { |
| "DFD0", |
| "DFD1", |
| "DFD2", |
| "DFD3", |
| "DFD4", |
| "DFD5", |
| "DFD6", |
| "DFD7" |
| }; |
| |
| if (dev->path.type == DEVICE_PATH_PCI && |
| PCI_SLOT(dev->path.pci.devfn) == DF_DEV) |
| return df_acpi_names[PCI_FUNC(dev->path.pci.devfn)]; |
| |
| printk(BIOS_ERR, "%s: Unhandled device id 0x%x\n", __func__, dev->device); |
| return NULL; |
| } |
| #endif |
| |
| struct device_operations amd_data_fabric_ops = { |
| .read_resources = noop_read_resources, |
| .set_resources = noop_set_resources, |
| #if CONFIG(HAVE_ACPI_TABLES) |
| .acpi_name = data_fabric_acpi_name, |
| .acpi_fill_ssdt = acpi_device_write_pci_dev, |
| #endif |
| }; |