2022-01-10 20:57:29 +01:00
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/* SPDX-License-Identifier: GPL-2.0-only */
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/* TODO: Check if this is still correct */
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#include <acpi/acpi_device.h>
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#include <amdblocks/data_fabric.h>
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2022-02-23 17:54:20 +01:00
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#include <arch/hpet.h>
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2022-01-10 20:57:29 +01:00
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#include <console/console.h>
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#include <cpu/x86/lapic_def.h>
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#include <device/device.h>
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#include <device/pci.h>
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#include <device/pci_ids.h>
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#include <soc/data_fabric.h>
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#include <soc/iomap.h>
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#include <types.h>
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void data_fabric_set_mmio_np(void)
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{
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/*
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* Mark region from HPET-LAPIC or 0xfed00000-0xfee00000-1 as NP.
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*
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* AGESA has already programmed the NB MMIO routing, however nothing
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* is yet marked as non-posted.
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*
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* If there exists an overlapping routing base/limit pair, trim its
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* base or limit to avoid the new NP region. If any pair exists
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* completely within HPET-LAPIC range, remove it. If any pair surrounds
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* HPET-LAPIC, it must be split into two regions.
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*
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* TODO(b/156296146): Remove the settings from AGESA and allow coreboot
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* to own everything. If not practical, consider erasing all settings
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* and have coreboot reprogram them. At that time, make the source
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* below more flexible.
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* * Note that the code relies on the granularity of the HPET and
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* LAPIC addresses being sufficiently large that the shifted limits
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* +/-1 are always equivalent to the non-shifted values +/-1.
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*/
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unsigned int i;
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int reg;
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uint32_t base, limit, ctrl;
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const uint32_t np_bot = HPET_BASE_ADDRESS >> D18F0_MMIO_SHIFT;
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const uint32_t np_top = (LAPIC_DEFAULT_BASE - 1) >> D18F0_MMIO_SHIFT;
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data_fabric_print_mmio_conf();
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for (i = 0; i < NUM_NB_MMIO_REGS; i++) {
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/* Adjust all registers that overlap */
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ctrl = data_fabric_broadcast_read32(0, NB_MMIO_CONTROL(i));
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if (!(ctrl & (DF_MMIO_WE | DF_MMIO_RE)))
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continue; /* not enabled */
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base = data_fabric_broadcast_read32(0, NB_MMIO_BASE(i));
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limit = data_fabric_broadcast_read32(0, NB_MMIO_LIMIT(i));
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if (base > np_top || limit < np_bot)
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continue; /* no overlap at all */
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if (base >= np_bot && limit <= np_top) {
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data_fabric_disable_mmio_reg(i); /* 100% within, so remove */
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continue;
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}
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if (base < np_bot && limit > np_top) {
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/* Split the configured region */
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data_fabric_broadcast_write32(0, NB_MMIO_LIMIT(i), np_bot - 1);
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reg = data_fabric_find_unused_mmio_reg();
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if (reg < 0) {
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/* Although a pair could be freed later, this condition is
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* very unusual and deserves analysis. Flag an error and
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* leave the topmost part unconfigured. */
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printk(BIOS_ERR,
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"Error: Not enough NB MMIO routing registers\n");
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continue;
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}
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data_fabric_broadcast_write32(0, NB_MMIO_BASE(reg), np_top + 1);
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data_fabric_broadcast_write32(0, NB_MMIO_LIMIT(reg), limit);
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data_fabric_broadcast_write32(0, NB_MMIO_CONTROL(reg), ctrl);
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continue;
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}
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/* If still here, adjust only the base or limit */
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if (base <= np_bot)
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data_fabric_broadcast_write32(0, NB_MMIO_LIMIT(i), np_bot - 1);
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else
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data_fabric_broadcast_write32(0, NB_MMIO_BASE(i), np_top + 1);
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}
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reg = data_fabric_find_unused_mmio_reg();
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if (reg < 0) {
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printk(BIOS_ERR, "Error: cannot configure region as NP\n");
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return;
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}
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data_fabric_broadcast_write32(0, NB_MMIO_BASE(reg), np_bot);
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data_fabric_broadcast_write32(0, NB_MMIO_LIMIT(reg), np_top);
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data_fabric_broadcast_write32(0, NB_MMIO_CONTROL(reg),
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(IOMS0_FABRIC_ID << DF_MMIO_DST_FABRIC_ID_SHIFT) | DF_MMIO_NP
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| DF_MMIO_WE | DF_MMIO_RE);
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data_fabric_print_mmio_conf();
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}
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static const char *data_fabric_acpi_name(const struct device *dev)
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{
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switch (dev->device) {
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2022-03-07 04:34:52 +01:00
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case PCI_DID_AMD_FAM17H_MODELA0H_DF0:
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2022-01-10 20:57:29 +01:00
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return "DFD0";
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2022-03-07 04:34:52 +01:00
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case PCI_DID_AMD_FAM17H_MODELA0H_DF1:
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2022-01-10 20:57:29 +01:00
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return "DFD1";
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2022-03-07 04:34:52 +01:00
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case PCI_DID_AMD_FAM17H_MODELA0H_DF2:
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2022-01-10 20:57:29 +01:00
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return "DFD2";
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case PCI_DID_AMD_FAM17H_MODELA0H_DF3:
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2022-01-10 20:57:29 +01:00
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return "DFD3";
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2022-03-07 04:34:52 +01:00
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case PCI_DID_AMD_FAM17H_MODELA0H_DF4:
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2022-01-10 20:57:29 +01:00
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return "DFD4";
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2022-03-07 04:34:52 +01:00
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case PCI_DID_AMD_FAM17H_MODELA0H_DF5:
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2022-01-10 20:57:29 +01:00
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return "DFD5";
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2022-03-07 04:34:52 +01:00
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case PCI_DID_AMD_FAM17H_MODELA0H_DF6:
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2022-01-10 20:57:29 +01:00
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return "DFD6";
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2022-03-07 04:34:52 +01:00
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case PCI_DID_AMD_FAM17H_MODELA0H_DF7:
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2022-01-10 20:57:29 +01:00
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return "DFD7";
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default:
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printk(BIOS_ERR, "%s: Unhandled device id 0x%x\n", __func__, dev->device);
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}
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return NULL;
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}
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static struct device_operations data_fabric_ops = {
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.read_resources = noop_read_resources,
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.set_resources = noop_set_resources,
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.acpi_name = data_fabric_acpi_name,
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.acpi_fill_ssdt = acpi_device_write_pci_dev,
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};
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static const unsigned short pci_device_ids[] = {
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2022-03-07 04:34:52 +01:00
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PCI_DID_AMD_FAM17H_MODELA0H_DF0,
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PCI_DID_AMD_FAM17H_MODELA0H_DF1,
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PCI_DID_AMD_FAM17H_MODELA0H_DF2,
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PCI_DID_AMD_FAM17H_MODELA0H_DF3,
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PCI_DID_AMD_FAM17H_MODELA0H_DF4,
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PCI_DID_AMD_FAM17H_MODELA0H_DF5,
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PCI_DID_AMD_FAM17H_MODELA0H_DF6,
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PCI_DID_AMD_FAM17H_MODELA0H_DF7,
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2022-01-10 20:57:29 +01:00
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0
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};
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static const struct pci_driver data_fabric_driver __pci_driver = {
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.ops = &data_fabric_ops,
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2022-03-07 04:34:52 +01:00
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.vendor = PCI_VID_AMD,
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2022-01-10 20:57:29 +01:00
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.devices = pci_device_ids,
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};
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