cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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quirks.c (1591B)

      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}
     14
     15static void quirk_dp_credit_allocation(struct tb_switch *sw)
     16{
     17	if (sw->credit_allocation && sw->min_dp_main_credits == 56) {
     18		sw->min_dp_main_credits = 18;
     19		tb_sw_dbg(sw, "quirked DP main: %u\n", sw->min_dp_main_credits);
     20	}
     21}
     22
     23struct tb_quirk {
     24	u16 hw_vendor_id;
     25	u16 hw_device_id;
     26	u16 vendor;
     27	u16 device;
     28	void (*hook)(struct tb_switch *sw);
     29};
     30
     31static const struct tb_quirk tb_quirks[] = {
     32	/* Dell WD19TB supports self-authentication on unplug */
     33	{ 0x0000, 0x0000, 0x00d4, 0xb070, quirk_force_power_link },
     34	{ 0x0000, 0x0000, 0x00d4, 0xb071, quirk_force_power_link },
     35	/*
     36	 * Intel Goshen Ridge NVM 27 and before report wrong number of
     37	 * DP buffers.
     38	 */
     39	{ 0x8087, 0x0b26, 0x0000, 0x0000, quirk_dp_credit_allocation },
     40};
     41
     42/**
     43 * tb_check_quirks() - Check for quirks to apply
     44 * @sw: Thunderbolt switch
     45 *
     46 * Apply any quirks for the Thunderbolt controller.
     47 */
     48void tb_check_quirks(struct tb_switch *sw)
     49{
     50	int i;
     51
     52	for (i = 0; i < ARRAY_SIZE(tb_quirks); i++) {
     53		const struct tb_quirk *q = &tb_quirks[i];
     54
     55		if (q->hw_vendor_id && q->hw_vendor_id != sw->config.vendor_id)
     56			continue;
     57		if (q->hw_device_id && q->hw_device_id != sw->config.device_id)
     58			continue;
     59		if (q->vendor && q->vendor != sw->vendor)
     60			continue;
     61		if (q->device && q->device != sw->device)
     62			continue;
     63
     64		q->hook(sw);
     65	}
     66}