drivers/thunderbolt/quirks.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Thunderbolt driver - quirks
   4  *
   5  * Copyright (c) 2020 Mario Limonciello <mario.limonciello@dell.com>
   6  */
   7
   8 #include "tb.h"
   9
  10 static void quirk_force_power_link(struct tb_switch *sw)
  11 {
  12         sw->quirks |= QUIRK_FORCE_POWER_LINK_CONTROLLER;
  13         tb_sw_dbg(sw, "forcing power to link controller\n");
  14 }
  15
  16 static void quirk_dp_credit_allocation(struct tb_switch *sw)
  17 {
  18         if (sw->credit_allocation && sw->min_dp_main_credits == 56) {
  19                 sw->min_dp_main_credits = 18;
  20                 tb_sw_dbg(sw, "quirked DP main: %u\n", sw->min_dp_main_credits);
  21         }
  22 }
  23
  24 static void quirk_clx_disable(struct tb_switch *sw)
  25 {
  26         sw->quirks |= QUIRK_NO_CLX;
  27         tb_sw_dbg(sw, "disabling CL states\n");
  28 }
  29
  30 static void quirk_usb3_maximum_bandwidth(struct tb_switch *sw)
  31 {
  32         struct tb_port *port;
  33
  34         tb_switch_for_each_port(sw, port) {
  35                 if (!tb_port_is_usb3_down(port))
  36                         continue;
  37                 port->max_bw = 16376;
  38                 tb_port_dbg(port, "USB3 maximum bandwidth limited to %u Mb/s\n",
  39                             port->max_bw);
  40         }
  41 }
  42
  43 struct tb_quirk {
  44         u16 hw_vendor_id;
  45         u16 hw_device_id;
  46         u16 vendor;
  47         u16 device;
  48         void (*hook)(struct tb_switch *sw);
  49 };
  50
  51 static const struct tb_quirk tb_quirks[] = {
  52         /* Dell WD19TB supports self-authentication on unplug */
  53         { 0x0000, 0x0000, 0x00d4, 0xb070, quirk_force_power_link },
  54         { 0x0000, 0x0000, 0x00d4, 0xb071, quirk_force_power_link },
  55         /*
  56          * Intel Goshen Ridge NVM 27 and before report wrong number of
  57          * DP buffers.
  58          */
  59         { 0x8087, 0x0b26, 0x0000, 0x0000, quirk_dp_credit_allocation },
  60         /*
  61          * Limit the maximum USB3 bandwidth for the following Intel USB4
  62          * host routers due to a hardware issue.
  63          */
  64         { 0x8087, PCI_DEVICE_ID_INTEL_ADL_NHI0, 0x0000, 0x0000,
  65                   quirk_usb3_maximum_bandwidth },
  66         { 0x8087, PCI_DEVICE_ID_INTEL_ADL_NHI1, 0x0000, 0x0000,
  67                   quirk_usb3_maximum_bandwidth },
  68         { 0x8087, PCI_DEVICE_ID_INTEL_RPL_NHI0, 0x0000, 0x0000,
  69                   quirk_usb3_maximum_bandwidth },
  70         { 0x8087, PCI_DEVICE_ID_INTEL_RPL_NHI1, 0x0000, 0x0000,
  71                   quirk_usb3_maximum_bandwidth },
  72         { 0x8087, PCI_DEVICE_ID_INTEL_MTL_M_NHI0, 0x0000, 0x0000,
  73                   quirk_usb3_maximum_bandwidth },
  74         { 0x8087, PCI_DEVICE_ID_INTEL_MTL_P_NHI0, 0x0000, 0x0000,
  75                   quirk_usb3_maximum_bandwidth },
  76         { 0x8087, PCI_DEVICE_ID_INTEL_MTL_P_NHI1, 0x0000, 0x0000,
  77                   quirk_usb3_maximum_bandwidth },
  78         { 0x8087, PCI_DEVICE_ID_INTEL_BARLOW_RIDGE_HOST_80G_NHI, 0x0000, 0x0000,
  79                   quirk_usb3_maximum_bandwidth },
  80         { 0x8087, PCI_DEVICE_ID_INTEL_BARLOW_RIDGE_HOST_40G_NHI, 0x0000, 0x0000,
  81                   quirk_usb3_maximum_bandwidth },
  82         { 0x8087, PCI_DEVICE_ID_INTEL_BARLOW_RIDGE_HUB_80G_BRIDGE, 0x0000, 0x0000,
  83                   quirk_usb3_maximum_bandwidth },
  84         { 0x8087, PCI_DEVICE_ID_INTEL_BARLOW_RIDGE_HUB_40G_BRIDGE, 0x0000, 0x0000,
  85                   quirk_usb3_maximum_bandwidth },
  86         /*
  87          * CLx is not supported on AMD USB4 Yellow Carp and Pink Sardine platforms.
  88          */
  89         { 0x0438, 0x0208, 0x0000, 0x0000, quirk_clx_disable },
  90         { 0x0438, 0x0209, 0x0000, 0x0000, quirk_clx_disable },
  91         { 0x0438, 0x020a, 0x0000, 0x0000, quirk_clx_disable },
  92         { 0x0438, 0x020b, 0x0000, 0x0000, quirk_clx_disable },
  93 };
  94
  95 /**
  96  * tb_check_quirks() - Check for quirks to apply
  97  * @sw: Thunderbolt switch
  98  *
  99  * Apply any quirks for the Thunderbolt controller.
 100  */
 101 void tb_check_quirks(struct tb_switch *sw)
 102 {
 103         int i;
 104
 105         for (i = 0; i < ARRAY_SIZE(tb_quirks); i++) {
 106                 const struct tb_quirk *q = &tb_quirks[i];
 107
 108                 if (q->hw_vendor_id && q->hw_vendor_id != sw->config.vendor_id)
 109                         continue;
 110                 if (q->hw_device_id && q->hw_device_id != sw->config.device_id)
 111                         continue;
 112                 if (q->vendor && q->vendor != sw->vendor)
 113                         continue;
 114                 if (q->device && q->device != sw->device)
 115                         continue;
 116
 117                 tb_sw_dbg(sw, "running %ps\n", q->hook);
 118                 q->hook(sw);
 119         }
 120 }