diff options
| -rw-r--r-- | drivers/thunderbolt/switch.c | 13 | ||||
| -rw-r--r-- | drivers/thunderbolt/tb.c | 30 | ||||
| -rw-r--r-- | drivers/thunderbolt/tb.h | 2 | ||||
| -rw-r--r-- | drivers/thunderbolt/tb_regs.h | 4 | ||||
| -rw-r--r-- | drivers/thunderbolt/tunnel.c | 298 | ||||
| -rw-r--r-- | drivers/thunderbolt/tunnel.h | 38 |
6 files changed, 235 insertions, 150 deletions
diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c index 9756e6279dc9..b132439618da 100644 --- a/drivers/thunderbolt/switch.c +++ b/drivers/thunderbolt/switch.c @@ -599,6 +599,19 @@ static int tb_init_port(struct tb_port *port) } +/** + * tb_pci_port_enable() - Enable PCIe adapter port + * @port: PCIe port to enable + * @enable: Enable/disable the PCIe adapter + */ +int tb_pci_port_enable(struct tb_port *port, bool enable) +{ + u32 word = enable ? TB_PCI_EN : 0x0; + if (!port->cap_adap) + return -ENXIO; + return tb_port_write(port, &word, TB_CFG_PORT, port->cap_adap, 1); +} + /* switch utility functions */ static void tb_dump_switch(struct tb *tb, struct tb_regs_switch_header *sw) diff --git a/drivers/thunderbolt/tb.c b/drivers/thunderbolt/tb.c index 8de43a2ab205..36dad0a00ac2 100644 --- a/drivers/thunderbolt/tb.c +++ b/drivers/thunderbolt/tb.c @@ -91,14 +91,14 @@ static void tb_scan_port(struct tb_port *port) static void tb_free_invalid_tunnels(struct tb *tb) { struct tb_cm *tcm = tb_priv(tb); - struct tb_pci_tunnel *tunnel; - struct tb_pci_tunnel *n; + struct tb_tunnel *tunnel; + struct tb_tunnel *n; list_for_each_entry_safe(tunnel, n, &tcm->tunnel_list, list) { - if (tb_pci_is_invalid(tunnel)) { - tb_pci_deactivate(tunnel); + if (tb_tunnel_is_invalid(tunnel)) { + tb_tunnel_deactivate(tunnel); list_del(&tunnel->list); - tb_pci_free(tunnel); + tb_tunnel_free(tunnel); } } } @@ -178,7 +178,7 @@ static void tb_activate_pcie_devices(struct tb *tb) struct tb_switch *sw; struct tb_port *up_port; struct tb_port *down_port; - struct tb_pci_tunnel *tunnel; + struct tb_tunnel *tunnel; struct tb_cm *tcm = tb_priv(tb); /* scan for pcie devices at depth 1*/ @@ -214,17 +214,17 @@ static void tb_activate_pcie_devices(struct tb *tb) "All PCIe down ports are occupied, aborting\n"); continue; } - tunnel = tb_pci_alloc(tb, up_port, down_port); + tunnel = tb_tunnel_alloc_pci(tb, up_port, down_port); if (!tunnel) { tb_port_info(up_port, "PCIe tunnel allocation failed, aborting\n"); continue; } - if (tb_pci_activate(tunnel)) { + if (tb_tunnel_activate(tunnel)) { tb_port_info(up_port, "PCIe tunnel activation failed, aborting\n"); - tb_pci_free(tunnel); + tb_tunnel_free(tunnel); continue; } @@ -353,13 +353,13 @@ static void tb_handle_event(struct tb *tb, enum tb_cfg_pkg_type type, static void tb_stop(struct tb *tb) { struct tb_cm *tcm = tb_priv(tb); - struct tb_pci_tunnel *tunnel; - struct tb_pci_tunnel *n; + struct tb_tunnel *tunnel; + struct tb_tunnel *n; /* tunnels are only present after everything has been initialized */ list_for_each_entry_safe(tunnel, n, &tcm->tunnel_list, list) { - tb_pci_deactivate(tunnel); - tb_pci_free(tunnel); + tb_tunnel_deactivate(tunnel); + tb_tunnel_free(tunnel); } tb_switch_remove(tb->root_switch); tcm->hotplug_active = false; /* signal tb_handle_hotplug to quit */ @@ -418,7 +418,7 @@ static int tb_suspend_noirq(struct tb *tb) static int tb_resume_noirq(struct tb *tb) { struct tb_cm *tcm = tb_priv(tb); - struct tb_pci_tunnel *tunnel, *n; + struct tb_tunnel *tunnel, *n; tb_dbg(tb, "resuming...\n"); @@ -429,7 +429,7 @@ static int tb_resume_noirq(struct tb *tb) tb_free_invalid_tunnels(tb); tb_free_unplugged_children(tb->root_switch); list_for_each_entry_safe(tunnel, n, &tcm->tunnel_list, list) - tb_pci_restart(tunnel); + tb_tunnel_restart(tunnel); if (!list_empty(&tcm->tunnel_list)) { /* * the pcie links need some time to get going. diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h index b4d7c4d408bd..d1f8e9722f33 100644 --- a/drivers/thunderbolt/tb.h +++ b/drivers/thunderbolt/tb.h @@ -457,6 +457,8 @@ int tb_port_clear_counter(struct tb_port *port, int counter); int tb_switch_find_vse_cap(struct tb_switch *sw, enum tb_switch_vse_cap vsec); int tb_port_find_cap(struct tb_port *port, enum tb_port_cap cap); +int tb_pci_port_enable(struct tb_port *port, bool enable); + struct tb_path *tb_path_alloc(struct tb *tb, int num_hops); void tb_path_free(struct tb_path *path); int tb_path_activate(struct tb_path *path); diff --git a/drivers/thunderbolt/tb_regs.h b/drivers/thunderbolt/tb_regs.h index 82ac4ec8757f..75e935acade5 100644 --- a/drivers/thunderbolt/tb_regs.h +++ b/drivers/thunderbolt/tb_regs.h @@ -211,6 +211,10 @@ struct tb_regs_port_header { } __packed; +/* PCIe adapter registers */ + +#define TB_PCI_EN BIT(31) + /* Hop register from TB_CFG_HOPS. 8 byte per entry. */ struct tb_regs_hop { /* DWORD 0 */ diff --git a/drivers/thunderbolt/tunnel.c b/drivers/thunderbolt/tunnel.c index 1e470564e99d..20ce28276f7a 100644 --- a/drivers/thunderbolt/tunnel.c +++ b/drivers/thunderbolt/tunnel.c @@ -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 */ #include <linux/slab.h> @@ -11,14 +12,17 @@ #include "tunnel.h" #include "tb.h" +#define TB_PCI_PATH_DOWN 0 +#define TB_PCI_PATH_UP 1 + #define __TB_TUNNEL_PRINT(level, tunnel, fmt, arg...) \ do { \ - struct tb_pci_tunnel *__tunnel = (tunnel); \ + struct tb_tunnel *__tunnel = (tunnel); \ level(__tunnel->tb, "%llx:%x <-> %llx:%x (PCI): " fmt, \ - tb_route(__tunnel->down_port->sw), \ - __tunnel->down_port->port, \ - tb_route(__tunnel->up_port->sw), \ - __tunnel->up_port->port, \ + tb_route(__tunnel->src_port->sw), \ + __tunnel->src_port->port, \ + tb_route(__tunnel->dst_port->sw), \ + __tunnel->dst_port->port, \ ## arg); \ } while (0) @@ -29,6 +33,38 @@ #define tb_tunnel_info(tunnel, fmt, arg...) \ __TB_TUNNEL_PRINT(tb_info, tunnel, fmt, ##arg) +static struct tb_tunnel *tb_tunnel_alloc(struct tb *tb, size_t npaths) +{ + struct tb_tunnel *tunnel; + + tunnel = kzalloc(sizeof(*tunnel), GFP_KERNEL); + if (!tunnel) + return NULL; + + tunnel->paths = kcalloc(npaths, sizeof(tunnel->paths[0]), GFP_KERNEL); + if (!tunnel->paths) { + tb_tunnel_free(tunnel); + return NULL; + } + + INIT_LIST_HEAD(&tunnel->list); + tunnel->tb = tb; + tunnel->npaths = npaths; + + return tunnel; +} + +static int tb_pci_activate(struct tb_tunnel *tunnel, bool activate) +{ + int res; + + res = tb_pci_port_enable(tunnel->src_port, activate); + if (res) + return res; + + return tb_pci_port_enable(tunnel->dst_port, activate); +} + static void tb_pci_init_path(struct tb_path *path) { path->egress_fc_enable = TB_PATH_SOURCE | TB_PATH_INTERNAL; @@ -42,7 +78,10 @@ static void tb_pci_init_path(struct tb_path *path) } /** - * tb_pci_alloc() - allocate a pci tunnel + * tb_tunnel_alloc_pci() - allocate a pci tunnel + * @tb: Pointer to the domain structure + * @up: PCIe upstream adapter port + * @down: PCIe downstream adapter port * * Allocate a PCI tunnel. The ports must be of type TB_TYPE_PCIE_UP and * TB_TYPE_PCIE_DOWN. @@ -54,170 +93,185 @@ static void tb_pci_init_path(struct tb_path *path) * my thunderbolt devices). Therefore at most ONE path per device may be * activated. * - * Return: Returns a tb_pci_tunnel on success or NULL on failure. + * Return: Returns a tb_tunnel on success or NULL on failure. */ -struct tb_pci_tunnel *tb_pci_alloc(struct tb *tb, struct tb_port *up, - struct tb_port *down) +struct tb_tunnel *tb_tunnel_alloc_pci(struct tb *tb, struct tb_port *up, + struct tb_port *down) { - struct tb_pci_tunnel *tunnel = kzalloc(sizeof(*tunnel), GFP_KERNEL); + struct tb_path *path_to_up; + struct tb_path *path_to_down; + struct tb_tunnel *tunnel; + + tunnel = tb_tunnel_alloc(tb, 2); if (!tunnel) - goto err; - tunnel->tb = tb; - tunnel->down_port = down; - tunnel->up_port = up; - INIT_LIST_HEAD(&tunnel->list); - tunnel->path_to_up = tb_path_alloc(up->sw->tb, 2); - if (!tunnel->path_to_up) - goto err; - tunnel->path_to_down = tb_path_alloc(up->sw->tb, 2); - if (!tunnel->path_to_down) - goto err; - tb_pci_init_path(tunnel->path_to_up); - tb_pci_init_path(tunnel->path_to_down); - - tunnel->path_to_up->hops[0].in_port = down; - tunnel->path_to_up->hops[0].in_hop_index = 8; - tunnel->path_to_up->hops[0].in_counter_index = -1; - tunnel->path_to_up->hops[0].out_port = tb_upstream_port(up->sw)->remote; - tunnel->path_to_up->hops[0].next_hop_index = 8; - - tunnel->path_to_up->hops[1].in_port = tb_upstream_port(up->sw); - tunnel->path_to_up->hops[1].in_hop_index = 8; - tunnel->path_to_up->hops[1].in_counter_index = -1; - tunnel->path_to_up->hops[1].out_port = up; - tunnel->path_to_up->hops[1].next_hop_index = 8; - - tunnel->path_to_down->hops[0].in_port = up; - tunnel->path_to_down->hops[0].in_hop_index = 8; - tunnel->path_to_down->hops[0].in_counter_index = -1; - tunnel->path_to_down->hops[0].out_port = tb_upstream_port(up->sw); - tunnel->path_to_down->hops[0].next_hop_index = 8; - - tunnel->path_to_down->hops[1].in_port = - tb_upstream_port(up->sw)->remote; - tunnel->path_to_down->hops[1].in_hop_index = 8; - tunnel->path_to_down->hops[1].in_counter_index = -1; - tunnel->path_to_down->hops[1].out_port = down; - tunnel->path_to_down->hops[1].next_hop_index = 8; - return tunnel; + return NULL; -err: - if (tunnel) { - if (tunnel->path_to_down) - tb_path_free(tunnel->path_to_down); - if (tunnel->path_to_up) - tb_path_free(tunnel->path_to_up); - kfree(tunnel); + tunnel->activate = tb_pci_activate; + tunnel->src_port = down; + tunnel->dst_port = up; + + path_to_up = tb_path_alloc(tb, 2); + if (!path_to_up) { + tb_tunnel_free(tunnel); + return NULL; } - return NULL; + tunnel->paths[TB_PCI_PATH_UP] = path_to_up; + + path_to_down = tb_path_alloc(tb, 2); + if (!path_to_down) { + tb_tunnel_free(tunnel); + return NULL; + } + tunnel->paths[TB_PCI_PATH_DOWN] = path_to_down; + + tb_pci_init_path(path_to_up); + tb_pci_init_path(path_to_down); + + path_to_up->hops[0].in_port = down; + path_to_up->hops[0].in_hop_index = 8; + path_to_up->hops[0].in_counter_index = -1; + path_to_up->hops[0].out_port = tb_upstream_port(up->sw)->remote; + path_to_up->hops[0].next_hop_index = 8; + + path_to_up->hops[1].in_port = tb_upstream_port(up->sw); + path_to_up->hops[1].in_hop_index = 8; + path_to_up->hops[1].in_counter_index = -1; + path_to_up->hops[1].out_port = up; + path_to_up->hops[1].next_hop_index = 8; + + path_to_down->hops[0].in_port = up; + path_to_down->hops[0].in_hop_index = 8; + path_to_down->hops[0].in_counter_index = -1; + path_to_down->hops[0].out_port = tb_upstream_port(up->sw); + path_to_down->hops[0].next_hop_index = 8; + + path_to_down->hops[1].in_port = tb_upstream_port(up->sw)->remote; + path_to_down->hops[1].in_hop_index = 8; + path_to_down->hops[1].in_counter_index = -1; + path_to_down->hops[1].out_port = down; + path_to_down->hops[1].next_hop_index = 8; + + return tunnel; } /** - * tb_pci_free() - free a tunnel + * tb_tunnel_free() - free a tunnel + * @tunnel: Tunnel to be freed * * The tunnel must have been deactivated. */ -void tb_pci_free(struct tb_pci_tunnel *tunnel) +void tb_tunnel_free(struct tb_tunnel *tunnel) { - if (tunnel->path_to_up->activated || tunnel->path_to_down->activated) { - tb_tunnel_WARN(tunnel, "trying to free an activated tunnel\n"); + int i; + + if (!tunnel) return; + + for (i = 0; i < tunnel->npaths; i++) { + if (tunnel->paths[i] && tunnel->paths[i]->activated) { + tb_tunnel_WARN(tunnel, + "trying to free an activated tunnel\n"); + return; + } } - tb_path_free(tunnel->path_to_up); - tb_path_free(tunnel->path_to_down); + + for (i = 0; i < tunnel->npaths; i++) { + if (tunnel->paths[i]) + tb_path_free(tunnel->paths[i]); + } + + kfree(tunnel->paths); kfree(tunnel); } /** - * tb_pci_is_invalid - check whether an activated path is still valid + * tb_tunnel_is_invalid - check whether an activated path is still valid + * @tunnel: Tunnel to check */ -bool tb_pci_is_invalid(struct tb_pci_tunnel *tunnel) +bool tb_tunnel_is_invalid(struct tb_tunnel *tunnel) { - WARN_ON(!tunnel->path_to_up->activated); - WARN_ON(!tunnel->path_to_down->activated); + int i; - return tb_path_is_invalid(tunnel->path_to_up) - || tb_path_is_invalid(tunnel->path_to_down); -} + for (i = 0; i < tunnel->npaths; i++) { + WARN_ON(!tunnel->paths[i]->activated); + if (tb_path_is_invalid(tunnel->paths[i])) + return true; + } -/** - * tb_pci_port_active() - activate/deactivate PCI capability - * - * Return: Returns 0 on success or an error code on failure. - */ -static int tb_pci_port_active(struct tb_port *port, bool active) -{ - u32 word = active ? 0x80000000 : 0x0; - if (!port->cap_adap) - return -ENXIO; - return tb_port_write(port, &word, TB_CFG_PORT, port->cap_adap, 1); + return false; } /** - * tb_pci_restart() - activate a tunnel after a hardware reset + * tb_tunnel_restart() - activate a tunnel after a hardware reset + * @tunnel: Tunnel to restart + * + * Return: 0 on success and negative errno in case if failure */ -int tb_pci_restart(struct tb_pci_tunnel *tunnel) +int tb_tunnel_restart(struct tb_tunnel *tunnel) { - int res; - tunnel->path_to_up->activated = false; - tunnel->path_to_down->activated = false; + int res, i; tb_tunnel_info(tunnel, "activating\n"); - 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; - return tb_pci_restart(tunnel); -} + 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_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) { + int i; + 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); -} + 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]); + } +} diff --git a/drivers/thunderbolt/tunnel.h b/drivers/thunderbolt/tunnel.h index dff0f27d6ab5..b4e992165e56 100644 --- a/drivers/thunderbolt/tunnel.h +++ b/drivers/thunderbolt/tunnel.h @@ -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 |