drivers/platform/x86/amd/pmc-quirks.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * AMD SoC Power Management Controller Driver Quirks
   4  *
   5  * Copyright (c) 2023, Advanced Micro Devices, Inc.
   6  * All Rights Reserved.
   7  *
   8  * Author: Mario Limonciello <mario.limonciello@amd.com>
   9  */
  10
  11 #include <linux/dmi.h>
  12 #include <linux/io.h>
  13 #include <linux/ioport.h>
  14
  15 #include "pmc.h"
  16
  17 struct quirk_entry {
  18         u32 s2idle_bug_mmio;
  19 };
  20
  21 static struct quirk_entry quirk_s2idle_bug = {
  22         .s2idle_bug_mmio = 0xfed80380,
  23 };
  24
  25 static const struct dmi_system_id fwbug_list[] = {
  26         {
  27                 .ident = "L14 Gen2 AMD",
  28                 .driver_data = &quirk_s2idle_bug,
  29                 .matches = {
  30                         DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
  31                         DMI_MATCH(DMI_PRODUCT_NAME, "20X5"),
  32                 }
  33         },
  34         {
  35                 .ident = "T14s Gen2 AMD",
  36                 .driver_data = &quirk_s2idle_bug,
  37                 .matches = {
  38                         DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
  39                         DMI_MATCH(DMI_PRODUCT_NAME, "20XF"),
  40                 }
  41         },
  42         {
  43                 .ident = "X13 Gen2 AMD",
  44                 .driver_data = &quirk_s2idle_bug,
  45                 .matches = {
  46                         DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
  47                         DMI_MATCH(DMI_PRODUCT_NAME, "20XH"),
  48                 }
  49         },
  50         {
  51                 .ident = "T14 Gen2 AMD",
  52                 .driver_data = &quirk_s2idle_bug,
  53                 .matches = {
  54                         DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
  55                         DMI_MATCH(DMI_PRODUCT_NAME, "20XK"),
  56                 }
  57         },
  58         {
  59                 .ident = "T14 Gen1 AMD",
  60                 .driver_data = &quirk_s2idle_bug,
  61                 .matches = {
  62                         DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
  63                         DMI_MATCH(DMI_PRODUCT_NAME, "20UD"),
  64                 }
  65         },
  66         {
  67                 .ident = "T14 Gen1 AMD",
  68                 .driver_data = &quirk_s2idle_bug,
  69                 .matches = {
  70                         DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
  71                         DMI_MATCH(DMI_PRODUCT_NAME, "20UE"),
  72                 }
  73         },
  74         {
  75                 .ident = "T14s Gen1 AMD",
  76                 .driver_data = &quirk_s2idle_bug,
  77                 .matches = {
  78                         DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
  79                         DMI_MATCH(DMI_PRODUCT_NAME, "20UH"),
  80                 }
  81         },
  82         {
  83                 .ident = "T14s Gen1 AMD",
  84                 .driver_data = &quirk_s2idle_bug,
  85                 .matches = {
  86                         DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
  87                         DMI_MATCH(DMI_PRODUCT_NAME, "20UJ"),
  88                 }
  89         },
  90         {
  91                 .ident = "P14s Gen1 AMD",
  92                 .driver_data = &quirk_s2idle_bug,
  93                 .matches = {
  94                         DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
  95                         DMI_MATCH(DMI_PRODUCT_NAME, "20Y1"),
  96                 }
  97         },
  98         {
  99                 .ident = "P14s Gen2 AMD",
 100                 .driver_data = &quirk_s2idle_bug,
 101                 .matches = {
 102                         DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
 103                         DMI_MATCH(DMI_PRODUCT_NAME, "21A0"),
 104                 }
 105         },
 106         {
 107                 .ident = "P14s Gen2 AMD",
 108                 .driver_data = &quirk_s2idle_bug,
 109                 .matches = {
 110                         DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
 111                         DMI_MATCH(DMI_PRODUCT_NAME, "21A1"),
 112                 }
 113         },
 114         /* https://gitlab.freedesktop.org/drm/amd/-/issues/2684 */
 115         {
 116                 .ident = "HP Laptop 15s-eq2xxx",
 117                 .driver_data = &quirk_s2idle_bug,
 118                 .matches = {
 119                         DMI_MATCH(DMI_SYS_VENDOR, "HP"),
 120                         DMI_MATCH(DMI_PRODUCT_NAME, "HP Laptop 15s-eq2xxx"),
 121                 }
 122         },
 123         {}
 124 };
 125
 126 /*
 127  * Laptops that run a SMI handler during the D3->D0 transition that occurs
 128  * specifically when exiting suspend to idle which can cause
 129  * large delays during resume when the IOMMU translation layer is enabled (the default
 130  * behavior) for NVME devices:
 131  *
 132  * To avoid this firmware problem, skip the SMI handler on these machines before the
 133  * D0 transition occurs.
 134  */
 135 static void amd_pmc_skip_nvme_smi_handler(u32 s2idle_bug_mmio)
 136 {
 137         void __iomem *addr;
 138         u8 val;
 139
 140         if (!request_mem_region_muxed(s2idle_bug_mmio, 1, "amd_pmc_pm80"))
 141                 return;
 142
 143         addr = ioremap(s2idle_bug_mmio, 1);
 144         if (!addr)
 145                 goto cleanup_resource;
 146
 147         val = ioread8(addr);
 148         iowrite8(val & ~BIT(0), addr);
 149
 150         iounmap(addr);
 151 cleanup_resource:
 152         release_mem_region(s2idle_bug_mmio, 1);
 153 }
 154
 155 void amd_pmc_process_restore_quirks(struct amd_pmc_dev *dev)
 156 {
 157         if (dev->quirks && dev->quirks->s2idle_bug_mmio)
 158                 amd_pmc_skip_nvme_smi_handler(dev->quirks->s2idle_bug_mmio);
 159 }
 160
 161 void amd_pmc_quirks_init(struct amd_pmc_dev *dev)
 162 {
 163         const struct dmi_system_id *dmi_id;
 164
 165         dmi_id = dmi_first_match(fwbug_list);
 166         if (!dmi_id)
 167                 return;
 168         dev->quirks = dmi_id->driver_data;
 169         if (dev->quirks->s2idle_bug_mmio)
 170                 pr_info("Using s2idle quirk to avoid %s platform firmware bug\n",
 171                         dmi_id->ident);
 172 }