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author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-04-27 15:36:16 +0200 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-04-27 15:36:16 +0200 |
commit | c0286f568069198484552c39fd2714153b2b16ec (patch) | |
tree | 848c3af672adf61006fbc40f99361bf0296f1a38 /drivers/thunderbolt/tunnel_pci.c | |
parent | 62909da8aca048ecf9fbd7e484e5100608f40a63 (diff) | |
parent | 37209783c73a47692dbf1e6b2dba0d07f6ce24b3 (diff) |
Merge tag 'thunderbolt-for-v5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/westeri/thunderbolt into char-misc-next
Mika writes:
thunderbolt: Changes for v5.2 merge window
This improves software connection manager on older Apple systems with
Thunderbolt 1 and 2 controller to support full PCIe daisy chains,
Display Port tunneling and P2P networking. There are also fixes for
potential NULL pointer dereferences at various places in the driver.
* tag 'thunderbolt-for-v5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/westeri/thunderbolt: (44 commits)
thunderbolt: Make priority unsigned in struct tb_path
thunderbolt: Start firmware on Titan Ridge Apple systems
thunderbolt: Reword output of tb_dump_hop()
thunderbolt: Make rest of the logging to happen at debug level
thunderbolt: Make __TB_[SW|PORT]_PRINT take const parameters
thunderbolt: Add support for XDomain connections
thunderbolt: Make tb_switch_alloc() return ERR_PTR()
thunderbolt: Add support for DMA tunnels
thunderbolt: Add XDomain UUID exchange support
thunderbolt: Run tb_xdp_handle_request() in system workqueue
thunderbolt: Do not tear down tunnels when driver is unloaded
thunderbolt: Add support for Display Port tunnels
thunderbolt: Rework NFC credits handling
thunderbolt: Generalize port finding routines to support all port types
thunderbolt: Scan only valid NULL adapter ports in hotplug
thunderbolt: Add support for full PCIe daisy chains
thunderbolt: Discover preboot PCIe paths the boot firmware established
thunderbolt: Deactivate all paths before restarting them
thunderbolt: Extend tunnel creation to more than 2 adjacent switches
thunderbolt: Add helper function to iterate from one port to another
...
Diffstat (limited to 'drivers/thunderbolt/tunnel_pci.c')
-rw-r--r-- | drivers/thunderbolt/tunnel_pci.c | 226 |
1 files changed, 0 insertions, 226 deletions
diff --git a/drivers/thunderbolt/tunnel_pci.c b/drivers/thunderbolt/tunnel_pci.c deleted file mode 100644 index 0637537ea53f..000000000000 --- a/drivers/thunderbolt/tunnel_pci.c +++ /dev/null @@ -1,226 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Thunderbolt Cactus Ridge driver - PCIe tunnel - * - * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com> - */ - -#include <linux/slab.h> -#include <linux/list.h> - -#include "tunnel_pci.h" -#include "tb.h" - -#define __TB_TUNNEL_PRINT(level, tunnel, fmt, arg...) \ - do { \ - struct tb_pci_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, \ - ## arg); \ - } while (0) - -#define tb_tunnel_WARN(tunnel, fmt, arg...) \ - __TB_TUNNEL_PRINT(tb_WARN, tunnel, fmt, ##arg) -#define tb_tunnel_warn(tunnel, fmt, arg...) \ - __TB_TUNNEL_PRINT(tb_warn, tunnel, fmt, ##arg) -#define tb_tunnel_info(tunnel, fmt, arg...) \ - __TB_TUNNEL_PRINT(tb_info, tunnel, fmt, ##arg) - -static void tb_pci_init_path(struct tb_path *path) -{ - path->egress_fc_enable = TB_PATH_SOURCE | TB_PATH_INTERNAL; - path->egress_shared_buffer = TB_PATH_NONE; - path->ingress_fc_enable = TB_PATH_ALL; - path->ingress_shared_buffer = TB_PATH_NONE; - path->priority = 3; - path->weight = 1; - path->drop_packages = 0; - path->nfc_credits = 0; -} - -/** - * tb_pci_alloc() - allocate a pci tunnel - * - * Allocate a PCI tunnel. The ports must be of type TB_TYPE_PCIE_UP and - * TB_TYPE_PCIE_DOWN. - * - * Currently only paths consisting of two hops are supported (that is the - * ports must be on "adjacent" switches). - * - * The paths are hard-coded to use hop 8 (the only working hop id available on - * 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. - */ -struct tb_pci_tunnel *tb_pci_alloc(struct tb *tb, struct tb_port *up, - struct tb_port *down) -{ - struct tb_pci_tunnel *tunnel = kzalloc(sizeof(*tunnel), GFP_KERNEL); - 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; - -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); - } - return NULL; -} - -/** - * tb_pci_free() - free a tunnel - * - * The tunnel must have been deactivated. - */ -void tb_pci_free(struct tb_pci_tunnel *tunnel) -{ - if (tunnel->path_to_up->activated || tunnel->path_to_down->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); - kfree(tunnel); -} - -/** - * tb_pci_is_invalid - check whether an activated path is still valid - */ -bool tb_pci_is_invalid(struct tb_pci_tunnel *tunnel) -{ - WARN_ON(!tunnel->path_to_up->activated); - WARN_ON(!tunnel->path_to_down->activated); - - return tb_path_is_invalid(tunnel->path_to_up) - || tb_path_is_invalid(tunnel->path_to_down); -} - -/** - * 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; - int cap = tb_port_find_cap(port, TB_PORT_CAP_ADAP); - if (cap < 0) { - tb_port_warn(port, "TB_PORT_CAP_ADAP not found: %d\n", cap); - return cap; - } - return tb_port_write(port, &word, TB_CFG_PORT, cap, 1); -} - -/** - * tb_pci_restart() - activate a tunnel after a hardware reset - */ -int tb_pci_restart(struct tb_pci_tunnel *tunnel) -{ - int res; - tunnel->path_to_up->activated = false; - tunnel->path_to_down->activated = false; - - 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; - - res = tb_pci_port_active(tunnel->down_port, 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); - return res; -} - -/** - * tb_pci_activate() - activate a tunnel - * - * Return: Returns 0 on success or an error code on failure. - */ -int tb_pci_activate(struct tb_pci_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; - } - - return tb_pci_restart(tunnel); -} - - - -/** - * tb_pci_deactivate() - deactivate a tunnel - */ -void tb_pci_deactivate(struct tb_pci_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); -} - |