/* SPDX-License-Identifier: GPL-2.0-only */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "systemagent_def.h" /* SoC override function */ __weak void soc_systemagent_init(struct device *dev) { /* no-op */ } __weak void soc_add_fixed_mmio_resources(struct device *dev, int *resource_cnt) { /* no-op */ } __weak void soc_add_configurable_mmio_resources(struct device *dev, int *resource_cnt) { /* no-op */ } __weak int soc_get_uncore_prmmr_base_and_mask(uint64_t *base, uint64_t *mask) { /* return failure for this dummy API */ return -1; } __weak unsigned long sa_write_acpi_tables(const struct device *dev, unsigned long current, struct acpi_rsdp *rsdp) { return current; } __weak uint32_t soc_systemagent_max_chan_capacity_mib(u8 capid0_a_ddrsz) { return 32768; /* 32 GiB per channel */ } static uint8_t sa_get_ecc_type(const uint32_t capid0_a) { return capid0_a & CAPID_ECCDIS ? MEMORY_ARRAY_ECC_NONE : MEMORY_ARRAY_ECC_SINGLE_BIT; } static size_t sa_slots_per_channel(const uint32_t capid0_a) { return !(capid0_a & CAPID_DDPCD) + 1; } static size_t sa_number_of_channels(const uint32_t capid0_a) { return !(capid0_a & CAPID_PDCD) + 1; } static void sa_soc_systemagent_init(struct device *dev) { soc_systemagent_init(dev); struct memory_info *m = cbmem_find(CBMEM_ID_MEMINFO); if (m == NULL) return; const uint32_t capid0_a = pci_read_config32(dev, CAPID0_A); m->ecc_type = sa_get_ecc_type(capid0_a); m->max_capacity_mib = soc_systemagent_max_chan_capacity_mib(CAPID_DDRSZ(capid0_a)) * sa_number_of_channels(capid0_a); m->number_of_devices = sa_slots_per_channel(capid0_a) * sa_number_of_channels(capid0_a); } /* * Add all known fixed MMIO ranges that hang off the host bridge/memory * controller device. */ void sa_add_fixed_mmio_resources(struct device *dev, int *resource_cnt, const struct sa_mmio_descriptor *sa_fixed_resources, size_t count) { int i; int index = *resource_cnt; for (i = 0; i < count; i++) { uintptr_t base; size_t size; size = sa_fixed_resources[i].size; base = sa_fixed_resources[i].base; printk(BIOS_DEBUG, "SA MMIO resource: %-8s -> base = 0x%08llx, size = 0x%08llx\n", sa_fixed_resources[i].description, sa_fixed_resources[i].base, sa_fixed_resources[i].size); mmio_resource_kb(dev, index++, base / KiB, size / KiB); } *resource_cnt = index; } /* * DRAM memory mapped register * * TOUUD: This 64 bit register defines the Top of Upper Usable DRAM * TOLUD: This 32 bit register defines the Top of Low Usable DRAM * BGSM: This register contains the base address of stolen DRAM memory for GTT * TSEG: This register contains the base address of TSEG DRAM memory */ static const struct sa_mem_map_descriptor sa_memory_map[MAX_MAP_ENTRIES] = { { TOUUD, true, "TOUUD" }, { TOLUD, false, "TOLUD" }, { BGSM, false, "BGSM" }, { TSEG, false, "TSEG" }, }; /* Read DRAM memory map register value through PCI configuration space */ static void sa_read_map_entry(const struct device *dev, const struct sa_mem_map_descriptor *entry, uint64_t *result) { uint64_t value = 0; if (entry->is_64_bit) { value = pci_read_config32(dev, entry->reg + 4); value <<= 32; } value |= pci_read_config32(dev, entry->reg); /* All registers are on a 1MiB granularity. */ value = ALIGN_DOWN(value, 1 * MiB); *result = value; } static void sa_get_mem_map(struct device *dev, uint64_t *values) { int i; for (i = 0; i < MAX_MAP_ENTRIES; i++) sa_read_map_entry(dev, &sa_memory_map[i], &values[i]); } /* * These are the host memory ranges that should be added: * - 0 -> 0xa0000: cacheable * - 0xc0000 -> top_of_ram : cacheable * - top_of_ram -> TOLUD: not cacheable with standard MTRRs and reserved * - 4GiB -> TOUUD: cacheable * * The default SMRAM space is reserved so that the range doesn't * have to be saved during S3 Resume. Once marked reserved the OS * cannot use the memory. This is a bit of an odd place to reserve * the region, but the CPU devices don't have dev_ops->read_resources() * called on them. * * The range 0xa0000 -> 0xc0000 does not have any resources * associated with it to handle legacy VGA memory. If this range * is not omitted the mtrr code will setup the area as cacheable * causing VGA access to not work. * * Don't need to mark the entire top_of_ram till TOLUD range (used * for stolen memory like GFX and ME, PTT, DPR, PRMRR, TSEG etc) as * cacheable for OS usage as coreboot already done with mpinit w/ smm * relocation early. * * It should be noted that cacheable entry types need to be added in * order. The reason is that the current MTRR code assumes this and * falls over itself if it isn't. * * The resource index starts low and should not meet or exceed * PCI_BASE_ADDRESS_0. */ static void sa_add_dram_resources(struct device *dev, int *resource_count) { uintptr_t base_k; size_t size_k; uint64_t sa_map_values[MAX_MAP_ENTRIES]; uintptr_t top_of_ram; int index = *resource_count; top_of_ram = (uintptr_t)cbmem_top(); /* 0 - > 0xa0000 */ base_k = 0; size_k = (0xa0000 / KiB) - base_k; ram_resource_kb(dev, index++, base_k, size_k); /* 0xc0000 -> top_of_ram */ base_k = 0xc0000 / KiB; size_k = (top_of_ram / KiB) - base_k; ram_resource_kb(dev, index++, base_k, size_k); sa_get_mem_map(dev, &sa_map_values[0]); /* top_of_ram -> TOLUD */ base_k = top_of_ram; size_k = sa_map_values[SA_TOLUD_REG] - base_k; mmio_resource_kb(dev, index++, base_k / KiB, size_k / KiB); /* 4GiB -> TOUUD */ upper_ram_end(dev, index++, sa_map_values[SA_TOUUD_REG]); /* * Reserve everything between A segment and 1MB: * * 0xa0000 - 0xbffff: legacy VGA * 0xc0000 - 0xfffff: RAM */ mmio_resource_kb(dev, index++, 0xa0000 / KiB, (0xc0000 - 0xa0000) / KiB); reserved_ram_resource_kb(dev, index++, 0xc0000 / KiB, (1*MiB - 0xc0000) / KiB); *resource_count = index; } static bool is_imr_enabled(uint32_t imr_base_reg) { return !!(imr_base_reg & (1 << 31)); } static void imr_resource(struct device *dev, int idx, uint32_t base, uint32_t mask) { uint32_t base_k, size_k; /* Bits 28:0 encode the base address bits 38:10, hence the KiB unit. */ base_k = (base & 0x0fffffff); /* Bits 28:0 encode the AND mask used for comparison, in KiB. */ size_k = ((~mask & 0x0fffffff) + 1); /* * IMRs sit in lower DRAM. Mark them cacheable, otherwise we run * out of MTRRs. Memory reserved by IMRs is not usable for host * so mark it reserved. */ reserved_ram_resource_kb(dev, idx, base_k, size_k); } /* * Add IMR ranges that hang off the host bridge/memory * controller device in case CONFIG(SA_ENABLE_IMR) is selected by SoC. */ static void sa_add_imr_resources(struct device *dev, int *resource_cnt) { size_t i, imr_offset; uint32_t base, mask; int index = *resource_cnt; for (i = 0; i < MCH_NUM_IMRS; i++) { imr_offset = i * MCH_IMR_PITCH; base = MCHBAR32(imr_offset + MCH_IMR0_BASE); mask = MCHBAR32(imr_offset + MCH_IMR0_MASK); if (is_imr_enabled(base)) imr_resource(dev, index++, base, mask); } *resource_cnt = index; } static void systemagent_read_resources(struct device *dev) { int index = 0; /* Read standard PCI resources. */ pci_dev_read_resources(dev); /* Add all fixed MMIO resources. */ soc_add_fixed_mmio_resources(dev, &index); /* Add all configurable MMIO resources. */ soc_add_configurable_mmio_resources(dev, &index); /* Calculate and add DRAM resources. */ sa_add_dram_resources(dev, &index); if (CONFIG(SA_ENABLE_IMR)) /* Add the isolated memory ranges (IMRs). */ sa_add_imr_resources(dev, &index); /* Reserve the window used for extended BIOS decoding. */ if (CONFIG(FAST_SPI_SUPPORTS_EXT_BIOS_WINDOW)) mmio_resource_kb(dev, index++, CONFIG_EXT_BIOS_WIN_BASE / KiB, CONFIG_EXT_BIOS_WIN_SIZE / KiB); } void enable_power_aware_intr(void) { uint8_t pair; /* Enable Power Aware Interrupt Routing */ pair = MCHBAR8(MCH_PAIR); pair &= ~0x7; /* Clear 2:0 */ pair |= 0x4; /* Fixed Priority */ MCHBAR8(MCH_PAIR) = pair; } void sa_lock_pam(void) { const struct device *dev = pcidev_path_on_root(SA_DEVFN_ROOT); if (!dev) return; pci_or_config8(dev, PAM0, PAM_LOCK); } void ssdt_set_above_4g_pci(const struct device *dev) { if (dev->path.type != DEVICE_PATH_DOMAIN) return; uint64_t touud; sa_read_map_entry(pcidev_path_on_root(SA_DEVFN_ROOT), &sa_memory_map[SA_TOUUD_REG], &touud); const uint64_t len = POWER_OF_2(cpu_phys_address_size()) - touud; const char *scope = acpi_device_path(dev); acpigen_write_scope(scope); acpigen_write_name_qword("A4GB", touud); acpigen_write_name_qword("A4GS", len); acpigen_pop_len(); printk(BIOS_DEBUG, "PCI space above 4GB MMIO is at 0x%llx, len = 0x%llx\n", touud, len); } static struct device_operations systemagent_ops = { .read_resources = systemagent_read_resources, .set_resources = pci_dev_set_resources, .enable_resources = pci_dev_enable_resources, .init = sa_soc_systemagent_init, .ops_pci = &pci_dev_ops_pci, #if CONFIG(HAVE_ACPI_TABLES) .write_acpi_tables = sa_write_acpi_tables, #endif }; static const unsigned short systemagent_ids[] = { PCI_DID_INTEL_MTL_M_ID, PCI_DID_INTEL_MTL_P_ID_1, PCI_DID_INTEL_MTL_P_ID_2, PCI_DID_INTEL_MTL_P_ID_3, PCI_DID_INTEL_GLK_NB, PCI_DID_INTEL_APL_NB, PCI_DID_INTEL_CNL_ID_U, PCI_DID_INTEL_CNL_ID_Y, PCI_DID_INTEL_SKL_ID_U, PCI_DID_INTEL_SKL_ID_Y, PCI_DID_INTEL_SKL_ID_ULX, PCI_DID_INTEL_SKL_ID_H_4, PCI_DID_INTEL_SKL_ID_H_2, PCI_DID_INTEL_SKL_ID_S_2, PCI_DID_INTEL_SKL_ID_S_4, PCI_DID_INTEL_WHL_ID_W_2, PCI_DID_INTEL_WHL_ID_W_4, PCI_DID_INTEL_KBL_ID_S, PCI_DID_INTEL_SKL_ID_H_EM, PCI_DID_INTEL_KBL_ID_U, PCI_DID_INTEL_KBL_ID_Y, PCI_DID_INTEL_KBL_ID_H, PCI_DID_INTEL_KBL_U_R, PCI_DID_INTEL_KBL_ID_DT, PCI_DID_INTEL_KBL_ID_DT_2, PCI_DID_INTEL_CFL_ID_U, PCI_DID_INTEL_CFL_ID_U_2, PCI_DID_INTEL_CFL_ID_H, PCI_DID_INTEL_CFL_ID_H_4, PCI_DID_INTEL_CFL_ID_H_8, PCI_DID_INTEL_CFL_ID_S, PCI_DID_INTEL_CFL_ID_S_DT_2, PCI_DID_INTEL_CFL_ID_S_DT_4, PCI_DID_INTEL_CFL_ID_S_DT_8, PCI_DID_INTEL_CFL_ID_S_WS_4, PCI_DID_INTEL_CFL_ID_S_WS_6, PCI_DID_INTEL_CFL_ID_S_WS_8, PCI_DID_INTEL_CFL_ID_S_S_4, PCI_DID_INTEL_CFL_ID_S_S_6, PCI_DID_INTEL_CFL_ID_S_S_8, PCI_DID_INTEL_ICL_ID_U, PCI_DID_INTEL_ICL_ID_U_2_2, PCI_DID_INTEL_ICL_ID_Y, PCI_DID_INTEL_ICL_ID_Y_2, PCI_DID_INTEL_CML_ULT, PCI_DID_INTEL_CML_ULT_2_2, PCI_DID_INTEL_CML_ULT_6_2, PCI_DID_INTEL_CML_ULX, PCI_DID_INTEL_CML_S, PCI_DID_INTEL_CML_S_G0G1_P0P1_6_2, PCI_DID_INTEL_CML_S_P0P1_8_2, PCI_DID_INTEL_CML_S_P0P1_10_2, PCI_DID_INTEL_CML_S_G0G1_4, PCI_DID_INTEL_CML_S_G0G1_2, PCI_DID_INTEL_CML_H, PCI_DID_INTEL_CML_H_4_2, PCI_DID_INTEL_CML_H_8_2, PCI_DID_INTEL_TGL_ID_U_2_2, PCI_DID_INTEL_TGL_ID_U_4_2, PCI_DID_INTEL_TGL_ID_Y_2_2, PCI_DID_INTEL_TGL_ID_Y_4_2, PCI_DID_INTEL_TGL_ID_H_6_1, PCI_DID_INTEL_TGL_ID_H_8_1, PCI_DID_INTEL_EHL_ID_0, PCI_DID_INTEL_EHL_ID_1, PCI_DID_INTEL_EHL_ID_1A, PCI_DID_INTEL_EHL_ID_2, PCI_DID_INTEL_EHL_ID_2_1, PCI_DID_INTEL_EHL_ID_3, PCI_DID_INTEL_EHL_ID_3A, PCI_DID_INTEL_EHL_ID_4, PCI_DID_INTEL_EHL_ID_5, PCI_DID_INTEL_EHL_ID_6, PCI_DID_INTEL_EHL_ID_7, PCI_DID_INTEL_EHL_ID_8, PCI_DID_INTEL_EHL_ID_9, PCI_DID_INTEL_EHL_ID_10, PCI_DID_INTEL_EHL_ID_11, PCI_DID_INTEL_EHL_ID_12, PCI_DID_INTEL_EHL_ID_13, PCI_DID_INTEL_EHL_ID_14, PCI_DID_INTEL_EHL_ID_15, PCI_DID_INTEL_JSL_ID_1, PCI_DID_INTEL_JSL_ID_2, PCI_DID_INTEL_JSL_ID_3, PCI_DID_INTEL_JSL_ID_4, PCI_DID_INTEL_JSL_ID_5, PCI_DID_INTEL_ADL_S_ID_1, PCI_DID_INTEL_ADL_S_ID_2, PCI_DID_INTEL_ADL_S_ID_3, PCI_DID_INTEL_ADL_S_ID_4, PCI_DID_INTEL_ADL_S_ID_5, PCI_DID_INTEL_ADL_S_ID_6, PCI_DID_INTEL_ADL_S_ID_7, PCI_DID_INTEL_ADL_S_ID_8, PCI_DID_INTEL_ADL_S_ID_9, PCI_DID_INTEL_ADL_S_ID_10, PCI_DID_INTEL_ADL_S_ID_11, PCI_DID_INTEL_ADL_S_ID_12, PCI_DID_INTEL_ADL_S_ID_13, PCI_DID_INTEL_ADL_S_ID_14, PCI_DID_INTEL_ADL_S_ID_15, PCI_DID_INTEL_ADL_P_ID_1, PCI_DID_INTEL_ADL_P_ID_3, PCI_DID_INTEL_ADL_P_ID_4, PCI_DID_INTEL_ADL_P_ID_5, PCI_DID_INTEL_ADL_P_ID_6, PCI_DID_INTEL_ADL_P_ID_7, PCI_DID_INTEL_ADL_P_ID_8, PCI_DID_INTEL_ADL_P_ID_9, PCI_DID_INTEL_ADL_P_ID_10, PCI_DID_INTEL_ADL_M_ID_1, PCI_DID_INTEL_ADL_M_ID_2, PCI_DID_INTEL_ADL_N_ID_1, PCI_DID_INTEL_ADL_N_ID_2, PCI_DID_INTEL_ADL_N_ID_3, PCI_DID_INTEL_ADL_N_ID_4, PCI_DID_INTEL_RPL_P_ID_1, PCI_DID_INTEL_RPL_P_ID_2, PCI_DID_INTEL_RPL_P_ID_3, 0 }; static const struct pci_driver systemagent_driver __pci_driver = { .ops = &systemagent_ops, .vendor = PCI_VID_INTEL, .devices = systemagent_ids };