tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
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
10static 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
16static 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
24static void quirk_clx_disable(struct tb_switch *sw)
25{
26 if (tb_switch_is_titan_ridge(sw) && sw->nvm && sw->nvm->major >= 0x65)
27 return;
28
29 sw->quirks |= QUIRK_NO_CLX;
30 tb_sw_dbg(sw, "disabling CL states\n");
31}
32
33static void quirk_usb3_maximum_bandwidth(struct tb_switch *sw)
34{
35 struct tb_port *port;
36
37 if (tb_switch_is_icm(sw))
38 return;
39
40 tb_switch_for_each_port(sw, port) {
41 if (!tb_port_is_usb3_down(port))
42 continue;
43 port->max_bw = 16376;
44 tb_port_dbg(port, "USB3 maximum bandwidth limited to %u Mb/s\n",
45 port->max_bw);
46 }
47}
48
49static void quirk_block_rpm_in_redrive(struct tb_switch *sw)
50{
51 sw->quirks |= QUIRK_KEEP_POWER_IN_DP_REDRIVE;
52 tb_sw_dbg(sw, "preventing runtime PM in DP redrive mode\n");
53}
54
55struct tb_quirk {
56 u16 hw_vendor_id;
57 u16 hw_device_id;
58 u16 vendor;
59 u16 device;
60 void (*hook)(struct tb_switch *sw);
61};
62
63static const struct tb_quirk tb_quirks[] = {
64 /* Dell WD19TB supports self-authentication on unplug */
65 { 0x0000, 0x0000, 0x00d4, 0xb070, quirk_force_power_link },
66 { 0x0000, 0x0000, 0x00d4, 0xb071, quirk_force_power_link },
67
68 /* Intel Titan Ridge CLx is unstable on early firmware versions */
69 { 0x8086, PCI_DEVICE_ID_INTEL_TITAN_RIDGE_DD_BRIDGE, 0x0000, 0x0000,
70 quirk_clx_disable },
71 /*
72 * Intel Goshen Ridge NVM 27 and before report wrong number of
73 * DP buffers.
74 */
75 { 0x8087, 0x0b26, 0x0000, 0x0000, quirk_dp_credit_allocation },
76 /*
77 * Limit the maximum USB3 bandwidth for the following Intel USB4
78 * host routers due to a hardware issue.
79 */
80 { 0x8087, PCI_DEVICE_ID_INTEL_ADL_NHI0, 0x0000, 0x0000,
81 quirk_usb3_maximum_bandwidth },
82 { 0x8087, PCI_DEVICE_ID_INTEL_ADL_NHI1, 0x0000, 0x0000,
83 quirk_usb3_maximum_bandwidth },
84 { 0x8087, PCI_DEVICE_ID_INTEL_RPL_NHI0, 0x0000, 0x0000,
85 quirk_usb3_maximum_bandwidth },
86 { 0x8087, PCI_DEVICE_ID_INTEL_RPL_NHI1, 0x0000, 0x0000,
87 quirk_usb3_maximum_bandwidth },
88 { 0x8087, PCI_DEVICE_ID_INTEL_MTL_M_NHI0, 0x0000, 0x0000,
89 quirk_usb3_maximum_bandwidth },
90 { 0x8087, PCI_DEVICE_ID_INTEL_MTL_P_NHI0, 0x0000, 0x0000,
91 quirk_usb3_maximum_bandwidth },
92 { 0x8087, PCI_DEVICE_ID_INTEL_MTL_P_NHI1, 0x0000, 0x0000,
93 quirk_usb3_maximum_bandwidth },
94 { 0x8087, PCI_DEVICE_ID_INTEL_BARLOW_RIDGE_HOST_80G_NHI, 0x0000, 0x0000,
95 quirk_usb3_maximum_bandwidth },
96 { 0x8087, PCI_DEVICE_ID_INTEL_BARLOW_RIDGE_HOST_40G_NHI, 0x0000, 0x0000,
97 quirk_usb3_maximum_bandwidth },
98 { 0x8087, PCI_DEVICE_ID_INTEL_BARLOW_RIDGE_HUB_80G_BRIDGE, 0x0000, 0x0000,
99 quirk_usb3_maximum_bandwidth },
100 { 0x8087, PCI_DEVICE_ID_INTEL_BARLOW_RIDGE_HUB_40G_BRIDGE, 0x0000, 0x0000,
101 quirk_usb3_maximum_bandwidth },
102 /*
103 * Block Runtime PM in DP redrive mode for Intel Barlow Ridge host
104 * controllers.
105 */
106 { 0x8087, PCI_DEVICE_ID_INTEL_BARLOW_RIDGE_HOST_80G_NHI, 0x0000, 0x0000,
107 quirk_block_rpm_in_redrive },
108 { 0x8087, PCI_DEVICE_ID_INTEL_BARLOW_RIDGE_HOST_40G_NHI, 0x0000, 0x0000,
109 quirk_block_rpm_in_redrive },
110 /*
111 * CLx is not supported on AMD USB4 Yellow Carp and Pink Sardine platforms.
112 */
113 { 0x0438, 0x0208, 0x0000, 0x0000, quirk_clx_disable },
114 { 0x0438, 0x0209, 0x0000, 0x0000, quirk_clx_disable },
115 { 0x0438, 0x020a, 0x0000, 0x0000, quirk_clx_disable },
116 { 0x0438, 0x020b, 0x0000, 0x0000, quirk_clx_disable },
117};
118
119/**
120 * tb_check_quirks() - Check for quirks to apply
121 * @sw: Thunderbolt switch
122 *
123 * Apply any quirks for the Thunderbolt controller.
124 */
125void tb_check_quirks(struct tb_switch *sw)
126{
127 int i;
128
129 for (i = 0; i < ARRAY_SIZE(tb_quirks); i++) {
130 const struct tb_quirk *q = &tb_quirks[i];
131
132 if (q->hw_vendor_id && q->hw_vendor_id != sw->config.vendor_id)
133 continue;
134 if (q->hw_device_id && q->hw_device_id != sw->config.device_id)
135 continue;
136 if (q->vendor && q->vendor != sw->vendor)
137 continue;
138 if (q->device && q->device != sw->device)
139 continue;
140
141 tb_sw_dbg(sw, "running %ps\n", q->hook);
142 q->hook(sw);
143 }
144}