/* SPDX-License-Identifier: GPL-2.0-or-later */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include struct map_entry { uint32_t reg; int is_64_bit; int is_limit; int mask_bits; const char *description; }; enum { TOHM_REG, MMIOL_REG, MMCFG_BASE_REG, MMCFG_LIMIT_REG, TOLM_REG, ME_BASE_REG, ME_LIMIT_REG, TSEG_BASE_REG, TSEG_LIMIT_REG, /* Must be last. */ NUM_MAP_ENTRIES }; static struct map_entry memory_map[NUM_MAP_ENTRIES] = { [TOHM_REG] = MAP_ENTRY_LIMIT_64(VTD_TOHM_CSR, 26, "TOHM"), [MMIOL_REG] = MAP_ENTRY_BASE_32(VTD_MMIOL_CSR, "MMIOL"), [MMCFG_BASE_REG] = MAP_ENTRY_BASE_64(VTD_MMCFG_BASE_CSR, "MMCFG_BASE"), [MMCFG_LIMIT_REG] = MAP_ENTRY_LIMIT_64(VTD_MMCFG_LIMIT_CSR, 26, "MMCFG_LIMIT"), [TOLM_REG] = MAP_ENTRY_LIMIT_32(VTD_TOLM_CSR, 26, "TOLM"), [ME_BASE_REG] = MAP_ENTRY_BASE_64(VTD_ME_BASE_CSR, "ME_BASE"), [ME_LIMIT_REG] = MAP_ENTRY_LIMIT_64(VTD_ME_LIMIT_CSR, 19, "ME_LIMIT"), [TSEG_BASE_REG] = MAP_ENTRY_BASE_32(VTD_TSEG_BASE_CSR, "TSEGMB_BASE"), [TSEG_LIMIT_REG] = MAP_ENTRY_LIMIT_32(VTD_TSEG_LIMIT_CSR, 20, "TSEGMB_LIMIT"), }; static void read_map_entry(struct device *dev, struct map_entry *entry, uint64_t *result) { uint64_t value; uint64_t mask; /* All registers are on a 1MiB granularity. */ mask = ((1ULL << entry->mask_bits) - 1); mask = ~mask; value = 0; if (entry->is_64_bit) { value = pci_read_config32(dev, entry->reg + sizeof(uint32_t)); value <<= 32; } value |= (uint64_t)pci_read_config32(dev, entry->reg); value &= mask; if (entry->is_limit) value |= ~mask; *result = value; } static void mc_read_map_entries(struct device *dev, uint64_t *values) { int i; for (i = 0; i < NUM_MAP_ENTRIES; i++) read_map_entry(dev, &memory_map[i], &values[i]); } static void mc_report_map_entries(struct device *dev, uint64_t *values) { int i; for (i = 0; i < NUM_MAP_ENTRIES; i++) { printk(BIOS_DEBUG, "MC MAP: %s: 0x%llx\n", memory_map[i].description, values[i]); } } static void configure_dpr(struct device *dev) { const uintptr_t cbmem_top_mb = ALIGN_UP((uintptr_t)cbmem_top(), MiB) / MiB; union dpr_register dpr = { .raw = pci_read_config32(dev, VTD_LTDPR) }; /* The DPR lock bit has to be set sufficiently early. It looks like * it cannot be set anymore after FSP-S. */ dpr.lock = 1; dpr.epm = 1; dpr.size = dpr.top - cbmem_top_mb; pci_write_config32(dev, VTD_LTDPR, dpr.raw); } /* * Host Memory Map: * * +--------------------------+ TOCM (2 pow 46 - 1) * | Reserved | * +--------------------------+ * | MMIOH (relocatable) | * +--------------------------+ * | PCISeg | * +--------------------------+ TOHM * | High DRAM Memory | * +--------------------------+ 4GiB (0x100000000) * +--------------------------+ 0xFFFF_FFFF * | Firmware | * +--------------------------+ 0xFF00_0000 * | Reserved | * +--------------------------+ 0xFEF0_0000 * | Local xAPIC | * +--------------------------+ 0xFEE0_0000 * | HPET/LT/TPM/Others | * +--------------------------+ 0xFED0_0000 * | I/O xAPIC | * +--------------------------+ 0xFEC0_0000 * | Reserved | * +--------------------------+ 0xFEB8_0000 * | Reserved | * +--------------------------+ 0xFEB0_0000 * | Reserved | * +--------------------------+ 0xFE00_0000 * | MMIOL (relocatable) | * | P2SB PCR cfg BAR | (0xfd000000 - 0xfdffffff * | BAR space | [mem 0x90000000-0xfcffffff] available for PCI devices * +--------------------------+ 0x9000_0000 * |PCIe MMCFG (relocatable) | CONFIG_ECAM_MMCONF_BASE_ADDRESS 64 or 256MB * | | (0x80000000 - 0x8fffffff, 0x40000) * +--------------------------+ TOLM * | MEseg (relocatable) | 32, 64, 128 or 256 MB (0x78000000 - 0x7fffffff, 0x20000) * +--------------------------+ * | Tseg (relocatable) | N x 8MB (0x70000000 - 0x77ffffff, 0x20000) * +--------------------------+ * | DPR | * +--------------------------+ cbmem_top * | Reserved - CBMEM | (0x6fffe000 - 0x6fffffff, 0x2000) * +--------------------------+ * | Reserved - FSP | (0x6fbfe000 - 0x6fffdfff, 0x400000) * +--------------------------+ top_of_ram (0x6fbfdfff) * | Low DRAM Memory | * +--------------------------+ FFFFF (1MB) * | E & F segments | * +--------------------------+ E0000 * | C & D segments | * +--------------------------+ C0000 * | VGA & SMM Memory | * +--------------------------+ A0000 * | Conventional Memory | * | (DOS Range) | * +--------------------------+ 0 */ static void mc_add_dram_resources(struct device *dev, int *res_count) { const struct resource *res; uint64_t mc_values[NUM_MAP_ENTRIES]; int index = *res_count; /* Only add dram resources once. */ if (dev->bus->secondary != 0) return; /* Read in the MAP registers and report their values. */ mc_read_map_entries(dev, &mc_values[0]); mc_report_map_entries(dev, &mc_values[0]); /* Conventional Memory (DOS region, 0x0 to 0x9FFFF) */ res = ram_from_to(dev, index++, 0, 0xa0000); LOG_RESOURCE("legacy_ram", dev, res); /* 1MB -> top_of_ram i.e., cbmem_top */ res = ram_from_to(dev, index++, 1 * MiB, (uintptr_t)cbmem_top()); LOG_RESOURCE("low_ram", dev, res); /* Mark TSEG/SMM region as reserved */ res = reserved_ram_from_to(dev, index++, mc_values[TSEG_BASE_REG], mc_values[TSEG_LIMIT_REG] + 1); LOG_RESOURCE("mmio_tseg", dev, res); /* Reserve and set up DPR */ configure_dpr(dev); union dpr_register dpr = { .raw = pci_read_config32(dev, VTD_LTDPR) }; if (dpr.size) { res = reserved_ram_from_to(dev, index++, (dpr.top - dpr.size) * MiB, dpr.top * MiB); LOG_RESOURCE("dpr", dev, res); } /* Mark region between TSEG - TOLM (eg. MESEG) as reserved */ res = reserved_ram_from_to(dev, index++, mc_values[TSEG_LIMIT_REG] + 1, mc_values[TOLM_REG]); LOG_RESOURCE("mmio_tolm", dev, res); /* 4GiB -> TOHM */ res = upper_ram_end(dev, index++, mc_values[TOHM_REG] + 1); LOG_RESOURCE("high_ram", dev, res); /* add MMIO CFG resource */ res = mmio_from_to(dev, index++, mc_values[MMCFG_BASE_REG], mc_values[MMCFG_LIMIT_REG] + 1); LOG_RESOURCE("mmiocfg_res", dev, res); /* add Local APIC resource */ res = mmio_range(dev, index++, LAPIC_DEFAULT_BASE, 0x00001000); LOG_RESOURCE("apic_res", dev, res); /* * Add legacy region as reserved - 0xa000 - 1MB * Reserve everything between A segment and 1MB: * * 0xa0000 - 0xbffff: legacy VGA * 0xc0000 - 0xfffff: RAM */ res = mmio_range(dev, index++, VGA_BASE_ADDRESS, VGA_BASE_SIZE); LOG_RESOURCE("legacy_mmio", dev, res); res = reserved_ram_from_to(dev, index++, 0xc0000, 1 * MiB); LOG_RESOURCE("legacy_write_protect", dev, res); *res_count = index; } static void mmapvtd_read_resources(struct device *dev) { int index = 0; /* Read standard PCI resources. */ pci_dev_read_resources(dev); /* Calculate and add DRAM resources. */ mc_add_dram_resources(dev, &index); } static void mmapvtd_init(struct device *dev) { } static struct device_operations mmapvtd_ops = { .read_resources = mmapvtd_read_resources, .set_resources = pci_dev_set_resources, .enable_resources = pci_dev_enable_resources, .init = mmapvtd_init, .ops_pci = &soc_pci_ops, #if CONFIG(HAVE_ACPI_TABLES) .acpi_inject_dsdt = uncore_inject_dsdt, #endif }; static const unsigned short mmapvtd_ids[] = { MMAP_VTD_CFG_REG_DEVID, /* Memory Map/Intel® VT-d Configuration Registers */ 0 }; static const struct pci_driver mmapvtd_driver __pci_driver = { .ops = &mmapvtd_ops, .vendor = PCI_VID_INTEL, .devices = mmapvtd_ids }; static void vtd_read_resources(struct device *dev) { pci_dev_read_resources(dev); configure_dpr(dev); } static struct device_operations vtd_ops = { .read_resources = vtd_read_resources, .set_resources = pci_dev_set_resources, .enable_resources = pci_dev_enable_resources, .ops_pci = &soc_pci_ops, }; /* VTD devices on other stacks */ static const struct pci_driver vtd_driver __pci_driver = { .ops = &vtd_ops, .vendor = PCI_VID_INTEL, .device = MMAP_VTD_STACK_CFG_REG_DEVID, }; static void dmi3_init(struct device *dev) { if (CONFIG(INTEL_TXT) && skip_intel_txt_lockdown()) return; /* Disable error injection */ pci_or_config16(dev, ERRINJCON, 1 << 0); /* * DMIRCBAR registers are not TXT lockable, but the BAR enable * bit is. TXT requires that DMIRCBAR be disabled for security. */ pci_and_config32(dev, DMIRCBAR, ~(1 << 0)); } static struct device_operations dmi3_ops = { .read_resources = pci_dev_read_resources, .set_resources = pci_dev_set_resources, .enable_resources = pci_dev_enable_resources, .init = dmi3_init, .ops_pci = &soc_pci_ops, }; static const struct pci_driver dmi3_driver __pci_driver = { .ops = &dmi3_ops, .vendor = PCI_VID_INTEL, .device = DMI3_DEVID, }; static void iio_dfx_global_init(struct device *dev) { if (CONFIG(INTEL_TXT) && skip_intel_txt_lockdown()) return; uint16_t reg16; pci_or_config16(dev, IIO_DFX_LCK_CTL, 0x3ff); reg16 = pci_read_config16(dev, IIO_DFX_TSWCTL0); reg16 &= ~(1 << 4); // allow ib mmio cfg reg16 &= ~(1 << 5); // ignore acs p2p ma lpbk reg16 |= (1 << 3); // me disable pci_write_config16(dev, IIO_DFX_TSWCTL0, reg16); } static const unsigned short iio_dfx_global_ids[] = { 0x202d, 0x203d, 0 }; static struct device_operations iio_dfx_global_ops = { .read_resources = pci_dev_read_resources, .set_resources = pci_dev_set_resources, .enable_resources = pci_dev_enable_resources, .init = iio_dfx_global_init, .ops_pci = &soc_pci_ops, }; static const struct pci_driver iio_dfx_global_driver __pci_driver = { .ops = &iio_dfx_global_ops, .vendor = PCI_VID_INTEL, .devices = iio_dfx_global_ids, };