src/soc/intel/xeon_sp/spr/soc_acpi.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <acpi/acpigen.h>
   4 #include <arch/smp/mpspec.h>
   5 #include <arch/vga.h>
   6 #include <assert.h>
   7 #include <cbmem.h>
   8 #include <cpu/intel/turbo.h>
   9 #include <device/mmio.h>
  10 #include <device/pci.h>
  11 #include <intelblocks/acpi.h>
  12 #include <intelblocks/cpulib.h>
  13 #include <intelblocks/pmclib.h>
  14 #include <soc/acpi.h>
  15 #include <soc/iomap.h>
  16 #include <soc/msr.h>
  17 #include <soc/pci_devs.h>
  18 #include <soc/pm.h>
  19 #include <soc/soc_util.h>
  20 #include <soc/util.h>
  21 #include <hob_iiouds.h>
  22
  23 int soc_madt_sci_irq_polarity(int sci)
  24 {
  25         if (sci >= 20)
  26                 return MP_IRQ_POLARITY_LOW;
  27         else
  28                 return MP_IRQ_POLARITY_HIGH;
  29 }
  30
  31 uint32_t soc_read_sci_irq_select(void)
  32 {
  33         /* PMC controller is hidden - hence PWRMBASE can't be accessbile using PCI cfg space */
  34         uintptr_t pmc_bar = PCH_PWRM_BASE_ADDRESS;
  35         return read32((void *)pmc_bar + PMC_ACPI_CNT);
  36 }
  37
  38 void soc_fill_fadt(acpi_fadt_t *fadt)
  39 {
  40         const uint16_t pmbase = ACPI_BASE_ADDRESS;
  41
  42         fadt->FADT_MinorVersion = 1;
  43         fadt->pm_tmr_blk = pmbase + PM1_TMR;
  44         fadt->pm_tmr_len = 4;
  45         /* Clear flags set by common/block/acpi/acpi.c acpi_fill_fadt() */
  46         fadt->flags &= ~ACPI_FADT_SEALED_CASE;
  47
  48         fadt->preferred_pm_profile = PM_ENTERPRISE_SERVER;
  49         fadt->pm2_cnt_blk = pmbase + PM2_CNT;
  50         fadt->pm2_cnt_len = 1;
  51
  52         /* PM Extended Registers */
  53         fill_fadt_extended_pm_io(fadt);
  54 }
  55
  56 /* TODO: See if we can use the common generate_p_state_entries */
  57 void soc_power_states_generation(int core, int cores_per_package)
  58 {
  59         int ratio_min, ratio_max, ratio_turbo, ratio_step;
  60         int coord_type, power_max, power_unit, num_entries;
  61         int ratio, power, clock, clock_max;
  62         msr_t msr;
  63
  64         /* Determine P-state coordination type from MISC_PWR_MGMT[0] */
  65         msr = rdmsr(MSR_MISC_PWR_MGMT);
  66         if (msr.lo & MISC_PWR_MGMT_EIST_HW_DIS)
  67                 coord_type = SW_ANY;
  68         else
  69                 coord_type = HW_ALL;
  70
  71         /* Get bus ratio limits and calculate clock speeds */
  72         msr = rdmsr(MSR_PLATFORM_INFO);
  73         ratio_min = (msr.hi >> (40 - 32)) & 0xff; /* Max Efficiency Ratio */
  74
  75         /* Determine if this CPU has configurable TDP */
  76         if (cpu_config_tdp_levels()) {
  77                 /* Set max ratio to nominal TDP ratio */
  78                 msr = rdmsr(MSR_CONFIG_TDP_NOMINAL);
  79                 ratio_max = msr.lo & 0xff;
  80         } else {
  81                 /* Max Non-Turbo Ratio */
  82                 ratio_max = (msr.lo >> 8) & 0xff;
  83         }
  84         clock_max = ratio_max * CONFIG_CPU_BCLK_MHZ;
  85
  86         /* Calculate CPU TDP in mW */
  87         msr = rdmsr(MSR_PKG_POWER_SKU_UNIT);
  88         power_unit = 2 << ((msr.lo & 0xf) - 1);
  89         msr = rdmsr(MSR_PKG_POWER_SKU);
  90         power_max = ((msr.lo & 0x7fff) / power_unit) * 1000;
  91
  92         /* Write _PCT indicating use of FFixedHW */
  93         acpigen_write_empty_PCT();
  94
  95         /* Write _PPC with no limit on supported P-state */
  96         acpigen_write_PPC_NVS();
  97
  98         /* Write PSD indicating configured coordination type */
  99         acpigen_write_PSD_package(core, 1, coord_type);
 100
 101         /* Add P-state entries in _PSS table */
 102         acpigen_write_name("_PSS");
 103
 104         /* Determine ratio points */
 105         ratio_step = PSS_RATIO_STEP;
 106         num_entries = ((ratio_max - ratio_min) / ratio_step) + 1;
 107         if (num_entries > PSS_MAX_ENTRIES) {
 108                 ratio_step += 1;
 109                 num_entries = ((ratio_max - ratio_min) / ratio_step) + 1;
 110         }
 111
 112         /* P[T] is Turbo state if enabled */
 113         if (get_turbo_state() == TURBO_ENABLED) {
 114                 /* _PSS package count including Turbo */
 115                 acpigen_write_package(num_entries + 2);
 116
 117                 msr = rdmsr(MSR_TURBO_RATIO_LIMIT);
 118                 ratio_turbo = msr.lo & 0xff;
 119
 120                 /* Add entry for Turbo ratio */
 121                 acpigen_write_PSS_package(clock_max + 1,          /* MHz */
 122                                           power_max,              /* mW */
 123                                           PSS_LATENCY_TRANSITION, /* lat1 */
 124                                           PSS_LATENCY_BUSMASTER,  /* lat2 */
 125                                           ratio_turbo << 8,       /* control */
 126                                           ratio_turbo << 8);      /* status */
 127         } else {
 128                 /* _PSS package count without Turbo */
 129                 acpigen_write_package(num_entries + 1);
 130         }
 131
 132         /* First regular entry is max non-turbo ratio */
 133         acpigen_write_PSS_package(clock_max,              /* MHz */
 134                                   power_max,              /* mW */
 135                                   PSS_LATENCY_TRANSITION, /* lat1 */
 136                                   PSS_LATENCY_BUSMASTER,  /* lat2 */
 137                                   ratio_max << 8,         /* control */
 138                                   ratio_max << 8);        /* status */
 139
 140         /* Generate the remaining entries */
 141         for (ratio = ratio_min + ((num_entries - 1) * ratio_step); ratio >= ratio_min;
 142              ratio -= ratio_step) {
 143                 /* Calculate power at this ratio */
 144                 power = common_calculate_power_ratio(power_max, ratio_max, ratio);
 145                 clock = ratio * CONFIG_CPU_BCLK_MHZ;
 146                 // clock = 1;
 147                 acpigen_write_PSS_package(clock,                  /* MHz */
 148                                           power,                  /* mW */
 149                                           PSS_LATENCY_TRANSITION, /* lat1 */
 150                                           PSS_LATENCY_BUSMASTER,  /* lat2 */
 151                                           ratio << 8,             /* control */
 152                                           ratio << 8);            /* status */
 153         }
 154
 155         /* Fix package length */
 156         acpigen_pop_len();
 157 }
 158
 159 unsigned long xeonsp_acpi_create_madt_lapics(unsigned long current)
 160 {
 161         struct device *cpu;
 162         uint8_t num_cpus = 0;
 163
 164         for (cpu = all_devices; cpu; cpu = cpu->next) {
 165                 if ((cpu->path.type != DEVICE_PATH_APIC)
 166                     || (cpu->upstream->dev->path.type != DEVICE_PATH_CPU_CLUSTER)) {
 167                         continue;
 168                 }
 169                 if (!cpu->enabled)
 170                         continue;
 171                 current = acpi_create_madt_one_lapic(current, num_cpus, cpu->path.apic.apic_id);
 172                 num_cpus++;
 173         }
 174
 175         return current;
 176 }
 177
 178 unsigned long acpi_fill_cedt(unsigned long current)
 179 {
 180         const IIO_UDS *hob = get_iio_uds();
 181         union uid {
 182                 uint32_t data;
 183                 struct {
 184                         uint8_t byte0;
 185                         uint8_t byte1;
 186                         uint8_t byte2;
 187                         uint8_t byte3;
 188                 };
 189         } cxl_uid;
 190         u32 cxl_ver;
 191         u64 base;
 192
 193         cxl_uid.byte0 = 'C';
 194         cxl_uid.byte1 = 'X';
 195         /* Loop through all sockets and stacks, add CHBS for each CXL IIO stack */
 196         for (uint8_t socket = 0, iio = 0; iio < hob->PlatformData.numofIIO; ++socket) {
 197                 if (!soc_cpu_is_enabled(socket))
 198                         continue;
 199                 iio++;
 200                 for (int x = 0; x < MAX_LOGIC_IIO_STACK; ++x) {
 201                         const STACK_RES *ri;
 202                         ri = &hob->PlatformData.IIO_resource[socket].StackRes[x];
 203                         if (!is_iio_cxl_stack_res(ri))
 204                                 continue;
 205                         /* uid needs to match with ACPI CXL device ID, eg. acpi/iiostack.asl */
 206                         cxl_uid.byte2 = socket + '0';
 207                         cxl_uid.byte3 = x + '0';
 208                         cxl_ver = ACPI_CEDT_CHBS_CXL_VER_1_1;
 209                         base = ri->Mmio32Base; /* DP RCRB base */
 210                         current += acpi_create_cedt_chbs((acpi_cedt_chbs_t *)current,
 211                                                          cxl_uid.data, cxl_ver, base);
 212                 }
 213         }
 214
 215         return current;
 216 }