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         if (tb_switch_is_icm(sw))
  35                 return;
  36
  37         tb_switch_for_each_port(sw, port) {
  38                 if (!tb_port_is_usb3_down(port))
  39                         continue;
  40                 port->max_bw = 16376;
  41                 tb_port_dbg(port, "USB3 maximum bandwidth limited to %u Mb/s\n",
  42                             port->max_bw);
  43         }
  44 }
  45
  46 struct tb_quirk {
  47         u16 hw_vendor_id;
  48         u16 hw_device_id;
  49         u16 vendor;
  50         u16 device;
  51         void (*hook)(struct tb_switch *sw);
  52 };
  53
  54 static const struct tb_quirk tb_quirks[] = {
  55         /* Dell WD19TB supports self-authentication on unplug */
  56         { 0x0000, 0x0000, 0x00d4, 0xb070, quirk_force_power_link },
  57         { 0x0000, 0x0000, 0x00d4, 0xb071, quirk_force_power_link },
  58         /*
  59          * Intel Goshen Ridge NVM 27 and before report wrong number of
  60          * DP buffers.
  61          */
  62         { 0x8087, 0x0b26, 0x0000, 0x0000, quirk_dp_credit_allocation },
  63         /*
  64          * Limit the maximum USB3 bandwidth for the following Intel USB4
  65          * host routers due to a hardware issue.
  66          */
  67         { 0x8087, PCI_DEVICE_ID_INTEL_ADL_NHI0, 0x0000, 0x0000,
  68                   quirk_usb3_maximum_bandwidth },
  69         { 0x8087, PCI_DEVICE_ID_INTEL_ADL_NHI1, 0x0000, 0x0000,
  70                   quirk_usb3_maximum_bandwidth },
  71         { 0x8087, PCI_DEVICE_ID_INTEL_RPL_NHI0, 0x0000, 0x0000,
  72                   quirk_usb3_maximum_bandwidth },
  73         { 0x8087, PCI_DEVICE_ID_INTEL_RPL_NHI1, 0x0000, 0x0000,
  74                   quirk_usb3_maximum_bandwidth },
  75         { 0x8087, PCI_DEVICE_ID_INTEL_MTL_M_NHI0, 0x0000, 0x0000,
  76                   quirk_usb3_maximum_bandwidth },
  77         { 0x8087, PCI_DEVICE_ID_INTEL_MTL_P_NHI0, 0x0000, 0x0000,
  78                   quirk_usb3_maximum_bandwidth },
  79         { 0x8087, PCI_DEVICE_ID_INTEL_MTL_P_NHI1, 0x0000, 0x0000,
  80                   quirk_usb3_maximum_bandwidth },
  81         { 0x8087, PCI_DEVICE_ID_INTEL_BARLOW_RIDGE_HOST_80G_NHI, 0x0000, 0x0000,
  82                   quirk_usb3_maximum_bandwidth },
  83         { 0x8087, PCI_DEVICE_ID_INTEL_BARLOW_RIDGE_HOST_40G_NHI, 0x0000, 0x0000,
  84                   quirk_usb3_maximum_bandwidth },
  85         { 0x8087, PCI_DEVICE_ID_INTEL_BARLOW_RIDGE_HUB_80G_BRIDGE, 0x0000, 0x0000,
  86                   quirk_usb3_maximum_bandwidth },
  87         { 0x8087, PCI_DEVICE_ID_INTEL_BARLOW_RIDGE_HUB_40G_BRIDGE, 0x0000, 0x0000,
  88                   quirk_usb3_maximum_bandwidth },
  89         /*
  90          * CLx is not supported on AMD USB4 Yellow Carp and Pink Sardine platforms.
  91          */
  92         { 0x0438, 0x0208, 0x0000, 0x0000, quirk_clx_disable },
  93         { 0x0438, 0x0209, 0x0000, 0x0000, quirk_clx_disable },
  94         { 0x0438, 0x020a, 0x0000, 0x0000, quirk_clx_disable },
  95         { 0x0438, 0x020b, 0x0000, 0x0000, quirk_clx_disable },
  96 };
  97
  98 /**
  99  * tb_check_quirks() - Check for quirks to apply
 100  * @sw: Thunderbolt switch
 101  *
 102  * Apply any quirks for the Thunderbolt controller.
 103  */
 104 void tb_check_quirks(struct tb_switch *sw)
 105 {
 106         int i;
 107
 108         for (i = 0; i < ARRAY_SIZE(tb_quirks); i++) {
 109                 const struct tb_quirk *q = &tb_quirks[i];
 110
 111                 if (q->hw_vendor_id && q->hw_vendor_id != sw->config.vendor_id)
 112                         continue;
 113                 if (q->hw_device_id && q->hw_device_id != sw->config.device_id)
 114                         continue;
 115                 if (q->vendor && q->vendor != sw->vendor)
 116                         continue;
 117                 if (q->device && q->device != sw->device)
 118                         continue;
 119
 120                 tb_sw_dbg(sw, "running %ps\n", q->hook);
 121                 q->hook(sw);
 122         }
 123 }