thunderbolt: Generalize tunnel creation functionality
To be able to tunnel non-PCIe traffic, separate tunnel functionality into generic and PCIe specific parts. Rename struct tb_pci_tunnel to tb_tunnel, and make it hold an array of paths instead of just two. Update all the tunneling functions to take this structure as parameter. We also move tb_pci_port_active() to switch.c (and rename it) where we will be keeping all port and switch related functions. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
This commit is contained in:
Mika Westerberg
Родитель
1752b9f787
Коммит
93f36ade5b
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@ -599,6 +599,19 @@ static int tb_init_port(struct tb_port *port)
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}
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/**
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* tb_pci_port_enable() - Enable PCIe adapter port
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* @port: PCIe port to enable
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* @enable: Enable/disable the PCIe adapter
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*/
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int tb_pci_port_enable(struct tb_port *port, bool enable)
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{
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u32 word = enable ? TB_PCI_EN : 0x0;
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if (!port->cap_adap)
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return -ENXIO;
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return tb_port_write(port, &word, TB_CFG_PORT, port->cap_adap, 1);
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}
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/* switch utility functions */
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static void tb_dump_switch(struct tb *tb, struct tb_regs_switch_header *sw)
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@ -91,14 +91,14 @@ static void tb_scan_port(struct tb_port *port)
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static void tb_free_invalid_tunnels(struct tb *tb)
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{
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struct tb_cm *tcm = tb_priv(tb);
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struct tb_pci_tunnel *tunnel;
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struct tb_pci_tunnel *n;
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struct tb_tunnel *tunnel;
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struct tb_tunnel *n;
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list_for_each_entry_safe(tunnel, n, &tcm->tunnel_list, list) {
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if (tb_pci_is_invalid(tunnel)) {
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tb_pci_deactivate(tunnel);
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if (tb_tunnel_is_invalid(tunnel)) {
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tb_tunnel_deactivate(tunnel);
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list_del(&tunnel->list);
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tb_pci_free(tunnel);
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tb_tunnel_free(tunnel);
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}
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}
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}
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@ -178,7 +178,7 @@ static void tb_activate_pcie_devices(struct tb *tb)
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struct tb_switch *sw;
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struct tb_port *up_port;
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struct tb_port *down_port;
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struct tb_pci_tunnel *tunnel;
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struct tb_tunnel *tunnel;
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struct tb_cm *tcm = tb_priv(tb);
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/* scan for pcie devices at depth 1*/
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@ -214,17 +214,17 @@ static void tb_activate_pcie_devices(struct tb *tb)
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"All PCIe down ports are occupied, aborting\n");
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continue;
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}
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tunnel = tb_pci_alloc(tb, up_port, down_port);
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tunnel = tb_tunnel_alloc_pci(tb, up_port, down_port);
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if (!tunnel) {
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tb_port_info(up_port,
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"PCIe tunnel allocation failed, aborting\n");
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continue;
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}
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if (tb_pci_activate(tunnel)) {
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if (tb_tunnel_activate(tunnel)) {
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tb_port_info(up_port,
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"PCIe tunnel activation failed, aborting\n");
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tb_pci_free(tunnel);
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tb_tunnel_free(tunnel);
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continue;
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}
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@ -353,13 +353,13 @@ static void tb_handle_event(struct tb *tb, enum tb_cfg_pkg_type type,
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static void tb_stop(struct tb *tb)
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{
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struct tb_cm *tcm = tb_priv(tb);
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struct tb_pci_tunnel *tunnel;
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struct tb_pci_tunnel *n;
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struct tb_tunnel *tunnel;
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struct tb_tunnel *n;
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/* tunnels are only present after everything has been initialized */
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list_for_each_entry_safe(tunnel, n, &tcm->tunnel_list, list) {
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tb_pci_deactivate(tunnel);
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tb_pci_free(tunnel);
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tb_tunnel_deactivate(tunnel);
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tb_tunnel_free(tunnel);
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}
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tb_switch_remove(tb->root_switch);
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tcm->hotplug_active = false; /* signal tb_handle_hotplug to quit */
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@ -418,7 +418,7 @@ static int tb_suspend_noirq(struct tb *tb)
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static int tb_resume_noirq(struct tb *tb)
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{
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struct tb_cm *tcm = tb_priv(tb);
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struct tb_pci_tunnel *tunnel, *n;
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struct tb_tunnel *tunnel, *n;
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tb_dbg(tb, "resuming...\n");
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@ -429,7 +429,7 @@ static int tb_resume_noirq(struct tb *tb)
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tb_free_invalid_tunnels(tb);
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tb_free_unplugged_children(tb->root_switch);
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list_for_each_entry_safe(tunnel, n, &tcm->tunnel_list, list)
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tb_pci_restart(tunnel);
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tb_tunnel_restart(tunnel);
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if (!list_empty(&tcm->tunnel_list)) {
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/*
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* the pcie links need some time to get going.
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@ -457,6 +457,8 @@ int tb_port_clear_counter(struct tb_port *port, int counter);
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int tb_switch_find_vse_cap(struct tb_switch *sw, enum tb_switch_vse_cap vsec);
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int tb_port_find_cap(struct tb_port *port, enum tb_port_cap cap);
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int tb_pci_port_enable(struct tb_port *port, bool enable);
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struct tb_path *tb_path_alloc(struct tb *tb, int num_hops);
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void tb_path_free(struct tb_path *path);
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int tb_path_activate(struct tb_path *path);
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@ -211,6 +211,10 @@ struct tb_regs_port_header {
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} __packed;
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/* PCIe adapter registers */
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#define TB_PCI_EN BIT(31)
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/* Hop register from TB_CFG_HOPS. 8 byte per entry. */
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struct tb_regs_hop {
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/* DWORD 0 */
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@ -1,8 +1,9 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Thunderbolt Cactus Ridge driver - Tunneling support
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* Thunderbolt driver - Tunneling support
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*
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* Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
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* Copyright (C) 2019, Intel Corporation
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*/
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#include <linux/slab.h>
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@ -11,14 +12,17 @@
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#include "tunnel.h"
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#include "tb.h"
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#define TB_PCI_PATH_DOWN 0
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#define TB_PCI_PATH_UP 1
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#define __TB_TUNNEL_PRINT(level, tunnel, fmt, arg...) \
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do { \
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struct tb_pci_tunnel *__tunnel = (tunnel); \
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struct tb_tunnel *__tunnel = (tunnel); \
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level(__tunnel->tb, "%llx:%x <-> %llx:%x (PCI): " fmt, \
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tb_route(__tunnel->down_port->sw), \
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__tunnel->down_port->port, \
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tb_route(__tunnel->up_port->sw), \
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__tunnel->up_port->port, \
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tb_route(__tunnel->src_port->sw), \
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__tunnel->src_port->port, \
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tb_route(__tunnel->dst_port->sw), \
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__tunnel->dst_port->port, \
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## arg); \
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} while (0)
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@ -29,6 +33,38 @@
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#define tb_tunnel_info(tunnel, fmt, arg...) \
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__TB_TUNNEL_PRINT(tb_info, tunnel, fmt, ##arg)
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static struct tb_tunnel *tb_tunnel_alloc(struct tb *tb, size_t npaths)
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{
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struct tb_tunnel *tunnel;
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tunnel = kzalloc(sizeof(*tunnel), GFP_KERNEL);
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if (!tunnel)
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return NULL;
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tunnel->paths = kcalloc(npaths, sizeof(tunnel->paths[0]), GFP_KERNEL);
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if (!tunnel->paths) {
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tb_tunnel_free(tunnel);
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return NULL;
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}
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INIT_LIST_HEAD(&tunnel->list);
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tunnel->tb = tb;
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tunnel->npaths = npaths;
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return tunnel;
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}
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static int tb_pci_activate(struct tb_tunnel *tunnel, bool activate)
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{
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int res;
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res = tb_pci_port_enable(tunnel->src_port, activate);
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if (res)
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return res;
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return tb_pci_port_enable(tunnel->dst_port, activate);
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}
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static void tb_pci_init_path(struct tb_path *path)
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{
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path->egress_fc_enable = TB_PATH_SOURCE | TB_PATH_INTERNAL;
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@ -42,7 +78,10 @@ static void tb_pci_init_path(struct tb_path *path)
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}
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/**
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* tb_pci_alloc() - allocate a pci tunnel
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* tb_tunnel_alloc_pci() - allocate a pci tunnel
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* @tb: Pointer to the domain structure
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* @up: PCIe upstream adapter port
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* @down: PCIe downstream adapter port
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*
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* Allocate a PCI tunnel. The ports must be of type TB_TYPE_PCIE_UP and
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* TB_TYPE_PCIE_DOWN.
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@ -54,170 +93,185 @@ static void tb_pci_init_path(struct tb_path *path)
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* my thunderbolt devices). Therefore at most ONE path per device may be
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* activated.
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*
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* Return: Returns a tb_pci_tunnel on success or NULL on failure.
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* Return: Returns a tb_tunnel on success or NULL on failure.
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*/
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struct tb_pci_tunnel *tb_pci_alloc(struct tb *tb, struct tb_port *up,
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struct tb_port *down)
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struct tb_tunnel *tb_tunnel_alloc_pci(struct tb *tb, struct tb_port *up,
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struct tb_port *down)
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{
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struct tb_pci_tunnel *tunnel = kzalloc(sizeof(*tunnel), GFP_KERNEL);
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struct tb_path *path_to_up;
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struct tb_path *path_to_down;
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struct tb_tunnel *tunnel;
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tunnel = tb_tunnel_alloc(tb, 2);
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if (!tunnel)
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goto err;
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tunnel->tb = tb;
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tunnel->down_port = down;
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tunnel->up_port = up;
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INIT_LIST_HEAD(&tunnel->list);
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tunnel->path_to_up = tb_path_alloc(up->sw->tb, 2);
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if (!tunnel->path_to_up)
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goto err;
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tunnel->path_to_down = tb_path_alloc(up->sw->tb, 2);
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if (!tunnel->path_to_down)
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goto err;
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tb_pci_init_path(tunnel->path_to_up);
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tb_pci_init_path(tunnel->path_to_down);
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return NULL;
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tunnel->path_to_up->hops[0].in_port = down;
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tunnel->path_to_up->hops[0].in_hop_index = 8;
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tunnel->path_to_up->hops[0].in_counter_index = -1;
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tunnel->path_to_up->hops[0].out_port = tb_upstream_port(up->sw)->remote;
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tunnel->path_to_up->hops[0].next_hop_index = 8;
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tunnel->activate = tb_pci_activate;
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tunnel->src_port = down;
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tunnel->dst_port = up;
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tunnel->path_to_up->hops[1].in_port = tb_upstream_port(up->sw);
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tunnel->path_to_up->hops[1].in_hop_index = 8;
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tunnel->path_to_up->hops[1].in_counter_index = -1;
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tunnel->path_to_up->hops[1].out_port = up;
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tunnel->path_to_up->hops[1].next_hop_index = 8;
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tunnel->path_to_down->hops[0].in_port = up;
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tunnel->path_to_down->hops[0].in_hop_index = 8;
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tunnel->path_to_down->hops[0].in_counter_index = -1;
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tunnel->path_to_down->hops[0].out_port = tb_upstream_port(up->sw);
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tunnel->path_to_down->hops[0].next_hop_index = 8;
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tunnel->path_to_down->hops[1].in_port =
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tb_upstream_port(up->sw)->remote;
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tunnel->path_to_down->hops[1].in_hop_index = 8;
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tunnel->path_to_down->hops[1].in_counter_index = -1;
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tunnel->path_to_down->hops[1].out_port = down;
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tunnel->path_to_down->hops[1].next_hop_index = 8;
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return tunnel;
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err:
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if (tunnel) {
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if (tunnel->path_to_down)
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tb_path_free(tunnel->path_to_down);
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if (tunnel->path_to_up)
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tb_path_free(tunnel->path_to_up);
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kfree(tunnel);
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path_to_up = tb_path_alloc(tb, 2);
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if (!path_to_up) {
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tb_tunnel_free(tunnel);
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return NULL;
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}
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return NULL;
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tunnel->paths[TB_PCI_PATH_UP] = path_to_up;
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path_to_down = tb_path_alloc(tb, 2);
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if (!path_to_down) {
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tb_tunnel_free(tunnel);
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return NULL;
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}
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tunnel->paths[TB_PCI_PATH_DOWN] = path_to_down;
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tb_pci_init_path(path_to_up);
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tb_pci_init_path(path_to_down);
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path_to_up->hops[0].in_port = down;
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path_to_up->hops[0].in_hop_index = 8;
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path_to_up->hops[0].in_counter_index = -1;
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path_to_up->hops[0].out_port = tb_upstream_port(up->sw)->remote;
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path_to_up->hops[0].next_hop_index = 8;
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path_to_up->hops[1].in_port = tb_upstream_port(up->sw);
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path_to_up->hops[1].in_hop_index = 8;
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path_to_up->hops[1].in_counter_index = -1;
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path_to_up->hops[1].out_port = up;
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path_to_up->hops[1].next_hop_index = 8;
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path_to_down->hops[0].in_port = up;
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path_to_down->hops[0].in_hop_index = 8;
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path_to_down->hops[0].in_counter_index = -1;
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path_to_down->hops[0].out_port = tb_upstream_port(up->sw);
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path_to_down->hops[0].next_hop_index = 8;
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path_to_down->hops[1].in_port = tb_upstream_port(up->sw)->remote;
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path_to_down->hops[1].in_hop_index = 8;
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path_to_down->hops[1].in_counter_index = -1;
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path_to_down->hops[1].out_port = down;
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path_to_down->hops[1].next_hop_index = 8;
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return tunnel;
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}
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/**
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* tb_pci_free() - free a tunnel
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* tb_tunnel_free() - free a tunnel
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* @tunnel: Tunnel to be freed
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*
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* The tunnel must have been deactivated.
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*/
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void tb_pci_free(struct tb_pci_tunnel *tunnel)
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void tb_tunnel_free(struct tb_tunnel *tunnel)
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{
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if (tunnel->path_to_up->activated || tunnel->path_to_down->activated) {
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tb_tunnel_WARN(tunnel, "trying to free an activated tunnel\n");
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int i;
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if (!tunnel)
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return;
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for (i = 0; i < tunnel->npaths; i++) {
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if (tunnel->paths[i] && tunnel->paths[i]->activated) {
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tb_tunnel_WARN(tunnel,
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"trying to free an activated tunnel\n");
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return;
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}
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}
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tb_path_free(tunnel->path_to_up);
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tb_path_free(tunnel->path_to_down);
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for (i = 0; i < tunnel->npaths; i++) {
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if (tunnel->paths[i])
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tb_path_free(tunnel->paths[i]);
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}
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kfree(tunnel->paths);
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kfree(tunnel);
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}
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/**
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* tb_pci_is_invalid - check whether an activated path is still valid
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* tb_tunnel_is_invalid - check whether an activated path is still valid
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* @tunnel: Tunnel to check
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*/
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bool tb_pci_is_invalid(struct tb_pci_tunnel *tunnel)
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bool tb_tunnel_is_invalid(struct tb_tunnel *tunnel)
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{
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WARN_ON(!tunnel->path_to_up->activated);
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WARN_ON(!tunnel->path_to_down->activated);
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int i;
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return tb_path_is_invalid(tunnel->path_to_up)
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|| tb_path_is_invalid(tunnel->path_to_down);
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for (i = 0; i < tunnel->npaths; i++) {
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WARN_ON(!tunnel->paths[i]->activated);
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if (tb_path_is_invalid(tunnel->paths[i]))
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return true;
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}
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return false;
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}
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/**
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* tb_pci_port_active() - activate/deactivate PCI capability
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* tb_tunnel_restart() - activate a tunnel after a hardware reset
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* @tunnel: Tunnel to restart
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*
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* Return: Returns 0 on success or an error code on failure.
|
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* Return: 0 on success and negative errno in case if failure
|
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*/
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static int tb_pci_port_active(struct tb_port *port, bool active)
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int tb_tunnel_restart(struct tb_tunnel *tunnel)
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{
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u32 word = active ? 0x80000000 : 0x0;
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if (!port->cap_adap)
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return -ENXIO;
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return tb_port_write(port, &word, TB_CFG_PORT, port->cap_adap, 1);
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}
|
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|
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/**
|
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* tb_pci_restart() - activate a tunnel after a hardware reset
|
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*/
|
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int tb_pci_restart(struct tb_pci_tunnel *tunnel)
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{
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int res;
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tunnel->path_to_up->activated = false;
|
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tunnel->path_to_down->activated = false;
|
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int res, i;
|
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|
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tb_tunnel_info(tunnel, "activating\n");
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||||
res = tb_path_activate(tunnel->path_to_up);
|
||||
if (res)
|
||||
goto err;
|
||||
res = tb_path_activate(tunnel->path_to_down);
|
||||
if (res)
|
||||
goto err;
|
||||
for (i = 0; i < tunnel->npaths; i++) {
|
||||
tunnel->paths[i]->activated = false;
|
||||
res = tb_path_activate(tunnel->paths[i]);
|
||||
if (res)
|
||||
goto err;
|
||||
}
|
||||
|
||||
res = tb_pci_port_active(tunnel->down_port, true);
|
||||
if (res)
|
||||
goto err;
|
||||
if (tunnel->activate) {
|
||||
res = tunnel->activate(tunnel, true);
|
||||
if (res)
|
||||
goto err;
|
||||
}
|
||||
|
||||
res = tb_pci_port_active(tunnel->up_port, true);
|
||||
if (res)
|
||||
goto err;
|
||||
return 0;
|
||||
|
||||
err:
|
||||
tb_tunnel_warn(tunnel, "activation failed\n");
|
||||
tb_pci_deactivate(tunnel);
|
||||
tb_tunnel_deactivate(tunnel);
|
||||
return res;
|
||||
}
|
||||
|
||||
/**
|
||||
* tb_pci_activate() - activate a tunnel
|
||||
* tb_tunnel_activate() - activate a tunnel
|
||||
* @tunnel: Tunnel to activate
|
||||
*
|
||||
* Return: Returns 0 on success or an error code on failure.
|
||||
*/
|
||||
int tb_pci_activate(struct tb_pci_tunnel *tunnel)
|
||||
int tb_tunnel_activate(struct tb_tunnel *tunnel)
|
||||
{
|
||||
if (tunnel->path_to_up->activated || tunnel->path_to_down->activated) {
|
||||
tb_tunnel_WARN(tunnel,
|
||||
"trying to activate an already activated tunnel\n");
|
||||
return -EINVAL;
|
||||
int i;
|
||||
|
||||
tb_tunnel_info(tunnel, "activating\n");
|
||||
|
||||
for (i = 0; i < tunnel->npaths; i++) {
|
||||
if (tunnel->paths[i]->activated) {
|
||||
tb_tunnel_WARN(tunnel,
|
||||
"trying to activate an already activated tunnel\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
}
|
||||
|
||||
return tb_pci_restart(tunnel);
|
||||
return tb_tunnel_restart(tunnel);
|
||||
}
|
||||
|
||||
|
||||
|
||||
/**
|
||||
* tb_pci_deactivate() - deactivate a tunnel
|
||||
* tb_tunnel_deactivate() - deactivate a tunnel
|
||||
* @tunnel: Tunnel to deactivate
|
||||
*/
|
||||
void tb_pci_deactivate(struct tb_pci_tunnel *tunnel)
|
||||
void tb_tunnel_deactivate(struct tb_tunnel *tunnel)
|
||||
{
|
||||
tb_tunnel_info(tunnel, "deactivating\n");
|
||||
/*
|
||||
* TODO: enable reset by writing 0x04000000 to TB_CAP_PCIE + 1 on up
|
||||
* port. Seems to have no effect?
|
||||
*/
|
||||
tb_pci_port_active(tunnel->up_port, false);
|
||||
tb_pci_port_active(tunnel->down_port, false);
|
||||
if (tunnel->path_to_down->activated)
|
||||
tb_path_deactivate(tunnel->path_to_down);
|
||||
if (tunnel->path_to_up->activated)
|
||||
tb_path_deactivate(tunnel->path_to_up);
|
||||
}
|
||||
int i;
|
||||
|
||||
tb_tunnel_info(tunnel, "deactivating\n");
|
||||
|
||||
if (tunnel->activate)
|
||||
tunnel->activate(tunnel, false);
|
||||
|
||||
for (i = 0; i < tunnel->npaths; i++) {
|
||||
if (tunnel->paths[i]->activated)
|
||||
tb_path_deactivate(tunnel->paths[i]);
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,8 +1,9 @@
|
|||
/* SPDX-License-Identifier: GPL-2.0 */
|
||||
/*
|
||||
* Thunderbolt Cactus Ridge driver - Tunneling support
|
||||
* Thunderbolt driver - Tunneling support
|
||||
*
|
||||
* Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
|
||||
* Copyright (C) 2019, Intel Corporation
|
||||
*/
|
||||
|
||||
#ifndef TB_TUNNEL_H_
|
||||
|
|
@ -10,22 +11,33 @@
|
|||
|
||||
#include "tb.h"
|
||||
|
||||
struct tb_pci_tunnel {
|
||||
/**
|
||||
* struct tb_tunnel - Tunnel between two ports
|
||||
* @tb: Pointer to the domain
|
||||
* @src_port: Source port of the tunnel
|
||||
* @dst_port: Destination port of the tunnel
|
||||
* @paths: All paths required by the tunnel
|
||||
* @npaths: Number of paths in @paths
|
||||
* @activate: Optional tunnel specific activation/deactivation
|
||||
* @list: Tunnels are linked using this field
|
||||
*/
|
||||
struct tb_tunnel {
|
||||
struct tb *tb;
|
||||
struct tb_port *up_port;
|
||||
struct tb_port *down_port;
|
||||
struct tb_path *path_to_up;
|
||||
struct tb_path *path_to_down;
|
||||
struct tb_port *src_port;
|
||||
struct tb_port *dst_port;
|
||||
struct tb_path **paths;
|
||||
size_t npaths;
|
||||
int (*activate)(struct tb_tunnel *tunnel, bool activate);
|
||||
struct list_head list;
|
||||
};
|
||||
|
||||
struct tb_pci_tunnel *tb_pci_alloc(struct tb *tb, struct tb_port *up,
|
||||
struct tb_port *down);
|
||||
void tb_pci_free(struct tb_pci_tunnel *tunnel);
|
||||
int tb_pci_activate(struct tb_pci_tunnel *tunnel);
|
||||
int tb_pci_restart(struct tb_pci_tunnel *tunnel);
|
||||
void tb_pci_deactivate(struct tb_pci_tunnel *tunnel);
|
||||
bool tb_pci_is_invalid(struct tb_pci_tunnel *tunnel);
|
||||
struct tb_tunnel *tb_tunnel_alloc_pci(struct tb *tb, struct tb_port *up,
|
||||
struct tb_port *down);
|
||||
void tb_tunnel_free(struct tb_tunnel *tunnel);
|
||||
int tb_tunnel_activate(struct tb_tunnel *tunnel);
|
||||
int tb_tunnel_restart(struct tb_tunnel *tunnel);
|
||||
void tb_tunnel_deactivate(struct tb_tunnel *tunnel);
|
||||
bool tb_tunnel_is_invalid(struct tb_tunnel *tunnel);
|
||||
|
||||
#endif
|
||||
|
||||
|
|
|
|||
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