linux/drivers/thunderbolt/icm.c
Mika Westerberg dd010bd7af thunderbolt: Handle NULL boot ACL entries properly
If the boot ACL entry is already NULL we should not fill in the upper
two DWs with 0xfffffffff. Otherwise they are not shown as empty entries
when the sysfs attribute is read.

Fixes: 9aaa3b8b4c ("thunderbolt: Add support for preboot ACL")
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Yehezkel Bernat <yehezkelshb@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-15 18:02:00 +02:00

1912 lines
48 KiB
C

/*
* Internal Thunderbolt Connection Manager. This is a firmware running on
* the Thunderbolt host controller performing most of the low-level
* handling.
*
* Copyright (C) 2017, Intel Corporation
* Authors: Michael Jamet <michael.jamet@intel.com>
* Mika Westerberg <mika.westerberg@linux.intel.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/delay.h>
#include <linux/mutex.h>
#include <linux/pci.h>
#include <linux/platform_data/x86/apple.h>
#include <linux/sizes.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
#include "ctl.h"
#include "nhi_regs.h"
#include "tb.h"
#define PCIE2CIO_CMD 0x30
#define PCIE2CIO_CMD_TIMEOUT BIT(31)
#define PCIE2CIO_CMD_START BIT(30)
#define PCIE2CIO_CMD_WRITE BIT(21)
#define PCIE2CIO_CMD_CS_MASK GENMASK(20, 19)
#define PCIE2CIO_CMD_CS_SHIFT 19
#define PCIE2CIO_CMD_PORT_MASK GENMASK(18, 13)
#define PCIE2CIO_CMD_PORT_SHIFT 13
#define PCIE2CIO_WRDATA 0x34
#define PCIE2CIO_RDDATA 0x38
#define PHY_PORT_CS1 0x37
#define PHY_PORT_CS1_LINK_DISABLE BIT(14)
#define PHY_PORT_CS1_LINK_STATE_MASK GENMASK(29, 26)
#define PHY_PORT_CS1_LINK_STATE_SHIFT 26
#define ICM_TIMEOUT 5000 /* ms */
#define ICM_APPROVE_TIMEOUT 10000 /* ms */
#define ICM_MAX_LINK 4
#define ICM_MAX_DEPTH 6
/**
* struct icm - Internal connection manager private data
* @request_lock: Makes sure only one message is send to ICM at time
* @rescan_work: Work used to rescan the surviving switches after resume
* @upstream_port: Pointer to the PCIe upstream port this host
* controller is connected. This is only set for systems
* where ICM needs to be started manually
* @vnd_cap: Vendor defined capability where PCIe2CIO mailbox resides
* (only set when @upstream_port is not %NULL)
* @safe_mode: ICM is in safe mode
* @max_boot_acl: Maximum number of preboot ACL entries (%0 if not supported)
* @is_supported: Checks if we can support ICM on this controller
* @get_mode: Read and return the ICM firmware mode (optional)
* @get_route: Find a route string for given switch
* @driver_ready: Send driver ready message to ICM
* @device_connected: Handle device connected ICM message
* @device_disconnected: Handle device disconnected ICM message
* @xdomain_connected - Handle XDomain connected ICM message
* @xdomain_disconnected - Handle XDomain disconnected ICM message
*/
struct icm {
struct mutex request_lock;
struct delayed_work rescan_work;
struct pci_dev *upstream_port;
size_t max_boot_acl;
int vnd_cap;
bool safe_mode;
bool (*is_supported)(struct tb *tb);
int (*get_mode)(struct tb *tb);
int (*get_route)(struct tb *tb, u8 link, u8 depth, u64 *route);
int (*driver_ready)(struct tb *tb,
enum tb_security_level *security_level,
size_t *nboot_acl);
void (*device_connected)(struct tb *tb,
const struct icm_pkg_header *hdr);
void (*device_disconnected)(struct tb *tb,
const struct icm_pkg_header *hdr);
void (*xdomain_connected)(struct tb *tb,
const struct icm_pkg_header *hdr);
void (*xdomain_disconnected)(struct tb *tb,
const struct icm_pkg_header *hdr);
};
struct icm_notification {
struct work_struct work;
struct icm_pkg_header *pkg;
struct tb *tb;
};
static inline struct tb *icm_to_tb(struct icm *icm)
{
return ((void *)icm - sizeof(struct tb));
}
static inline u8 phy_port_from_route(u64 route, u8 depth)
{
u8 link;
link = depth ? route >> ((depth - 1) * 8) : route;
return tb_phy_port_from_link(link);
}
static inline u8 dual_link_from_link(u8 link)
{
return link ? ((link - 1) ^ 0x01) + 1 : 0;
}
static inline u64 get_route(u32 route_hi, u32 route_lo)
{
return (u64)route_hi << 32 | route_lo;
}
static inline u64 get_parent_route(u64 route)
{
int depth = tb_route_length(route);
return depth ? route & ~(0xffULL << (depth - 1) * TB_ROUTE_SHIFT) : 0;
}
static bool icm_match(const struct tb_cfg_request *req,
const struct ctl_pkg *pkg)
{
const struct icm_pkg_header *res_hdr = pkg->buffer;
const struct icm_pkg_header *req_hdr = req->request;
if (pkg->frame.eof != req->response_type)
return false;
if (res_hdr->code != req_hdr->code)
return false;
return true;
}
static bool icm_copy(struct tb_cfg_request *req, const struct ctl_pkg *pkg)
{
const struct icm_pkg_header *hdr = pkg->buffer;
if (hdr->packet_id < req->npackets) {
size_t offset = hdr->packet_id * req->response_size;
memcpy(req->response + offset, pkg->buffer, req->response_size);
}
return hdr->packet_id == hdr->total_packets - 1;
}
static int icm_request(struct tb *tb, const void *request, size_t request_size,
void *response, size_t response_size, size_t npackets,
unsigned int timeout_msec)
{
struct icm *icm = tb_priv(tb);
int retries = 3;
do {
struct tb_cfg_request *req;
struct tb_cfg_result res;
req = tb_cfg_request_alloc();
if (!req)
return -ENOMEM;
req->match = icm_match;
req->copy = icm_copy;
req->request = request;
req->request_size = request_size;
req->request_type = TB_CFG_PKG_ICM_CMD;
req->response = response;
req->npackets = npackets;
req->response_size = response_size;
req->response_type = TB_CFG_PKG_ICM_RESP;
mutex_lock(&icm->request_lock);
res = tb_cfg_request_sync(tb->ctl, req, timeout_msec);
mutex_unlock(&icm->request_lock);
tb_cfg_request_put(req);
if (res.err != -ETIMEDOUT)
return res.err == 1 ? -EIO : res.err;
usleep_range(20, 50);
} while (retries--);
return -ETIMEDOUT;
}
static bool icm_fr_is_supported(struct tb *tb)
{
return !x86_apple_machine;
}
static inline int icm_fr_get_switch_index(u32 port)
{
int index;
if ((port & ICM_PORT_TYPE_MASK) != TB_TYPE_PORT)
return 0;
index = port >> ICM_PORT_INDEX_SHIFT;
return index != 0xff ? index : 0;
}
static int icm_fr_get_route(struct tb *tb, u8 link, u8 depth, u64 *route)
{
struct icm_fr_pkg_get_topology_response *switches, *sw;
struct icm_fr_pkg_get_topology request = {
.hdr = { .code = ICM_GET_TOPOLOGY },
};
size_t npackets = ICM_GET_TOPOLOGY_PACKETS;
int ret, index;
u8 i;
switches = kcalloc(npackets, sizeof(*switches), GFP_KERNEL);
if (!switches)
return -ENOMEM;
ret = icm_request(tb, &request, sizeof(request), switches,
sizeof(*switches), npackets, ICM_TIMEOUT);
if (ret)
goto err_free;
sw = &switches[0];
index = icm_fr_get_switch_index(sw->ports[link]);
if (!index) {
ret = -ENODEV;
goto err_free;
}
sw = &switches[index];
for (i = 1; i < depth; i++) {
unsigned int j;
if (!(sw->first_data & ICM_SWITCH_USED)) {
ret = -ENODEV;
goto err_free;
}
for (j = 0; j < ARRAY_SIZE(sw->ports); j++) {
index = icm_fr_get_switch_index(sw->ports[j]);
if (index > sw->switch_index) {
sw = &switches[index];
break;
}
}
}
*route = get_route(sw->route_hi, sw->route_lo);
err_free:
kfree(switches);
return ret;
}
static int
icm_fr_driver_ready(struct tb *tb, enum tb_security_level *security_level,
size_t *nboot_acl)
{
struct icm_fr_pkg_driver_ready_response reply;
struct icm_pkg_driver_ready request = {
.hdr.code = ICM_DRIVER_READY,
};
int ret;
memset(&reply, 0, sizeof(reply));
ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
1, ICM_TIMEOUT);
if (ret)
return ret;
if (security_level)
*security_level = reply.security_level & ICM_FR_SLEVEL_MASK;
return 0;
}
static int icm_fr_approve_switch(struct tb *tb, struct tb_switch *sw)
{
struct icm_fr_pkg_approve_device request;
struct icm_fr_pkg_approve_device reply;
int ret;
memset(&request, 0, sizeof(request));
memcpy(&request.ep_uuid, sw->uuid, sizeof(request.ep_uuid));
request.hdr.code = ICM_APPROVE_DEVICE;
request.connection_id = sw->connection_id;
request.connection_key = sw->connection_key;
memset(&reply, 0, sizeof(reply));
/* Use larger timeout as establishing tunnels can take some time */
ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
1, ICM_APPROVE_TIMEOUT);
if (ret)
return ret;
if (reply.hdr.flags & ICM_FLAGS_ERROR) {
tb_warn(tb, "PCIe tunnel creation failed\n");
return -EIO;
}
return 0;
}
static int icm_fr_add_switch_key(struct tb *tb, struct tb_switch *sw)
{
struct icm_fr_pkg_add_device_key request;
struct icm_fr_pkg_add_device_key_response reply;
int ret;
memset(&request, 0, sizeof(request));
memcpy(&request.ep_uuid, sw->uuid, sizeof(request.ep_uuid));
request.hdr.code = ICM_ADD_DEVICE_KEY;
request.connection_id = sw->connection_id;
request.connection_key = sw->connection_key;
memcpy(request.key, sw->key, TB_SWITCH_KEY_SIZE);
memset(&reply, 0, sizeof(reply));
ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
1, ICM_TIMEOUT);
if (ret)
return ret;
if (reply.hdr.flags & ICM_FLAGS_ERROR) {
tb_warn(tb, "Adding key to switch failed\n");
return -EIO;
}
return 0;
}
static int icm_fr_challenge_switch_key(struct tb *tb, struct tb_switch *sw,
const u8 *challenge, u8 *response)
{
struct icm_fr_pkg_challenge_device request;
struct icm_fr_pkg_challenge_device_response reply;
int ret;
memset(&request, 0, sizeof(request));
memcpy(&request.ep_uuid, sw->uuid, sizeof(request.ep_uuid));
request.hdr.code = ICM_CHALLENGE_DEVICE;
request.connection_id = sw->connection_id;
request.connection_key = sw->connection_key;
memcpy(request.challenge, challenge, TB_SWITCH_KEY_SIZE);
memset(&reply, 0, sizeof(reply));
ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
1, ICM_TIMEOUT);
if (ret)
return ret;
if (reply.hdr.flags & ICM_FLAGS_ERROR)
return -EKEYREJECTED;
if (reply.hdr.flags & ICM_FLAGS_NO_KEY)
return -ENOKEY;
memcpy(response, reply.response, TB_SWITCH_KEY_SIZE);
return 0;
}
static int icm_fr_approve_xdomain_paths(struct tb *tb, struct tb_xdomain *xd)
{
struct icm_fr_pkg_approve_xdomain_response reply;
struct icm_fr_pkg_approve_xdomain request;
int ret;
memset(&request, 0, sizeof(request));
request.hdr.code = ICM_APPROVE_XDOMAIN;
request.link_info = xd->depth << ICM_LINK_INFO_DEPTH_SHIFT | xd->link;
memcpy(&request.remote_uuid, xd->remote_uuid, sizeof(*xd->remote_uuid));
request.transmit_path = xd->transmit_path;
request.transmit_ring = xd->transmit_ring;
request.receive_path = xd->receive_path;
request.receive_ring = xd->receive_ring;
memset(&reply, 0, sizeof(reply));
ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
1, ICM_TIMEOUT);
if (ret)
return ret;
if (reply.hdr.flags & ICM_FLAGS_ERROR)
return -EIO;
return 0;
}
static int icm_fr_disconnect_xdomain_paths(struct tb *tb, struct tb_xdomain *xd)
{
u8 phy_port;
u8 cmd;
phy_port = tb_phy_port_from_link(xd->link);
if (phy_port == 0)
cmd = NHI_MAILBOX_DISCONNECT_PA;
else
cmd = NHI_MAILBOX_DISCONNECT_PB;
nhi_mailbox_cmd(tb->nhi, cmd, 1);
usleep_range(10, 50);
nhi_mailbox_cmd(tb->nhi, cmd, 2);
return 0;
}
static void add_switch(struct tb_switch *parent_sw, u64 route,
const uuid_t *uuid, u8 connection_id, u8 connection_key,
u8 link, u8 depth, enum tb_security_level security_level,
bool authorized, bool boot)
{
struct tb_switch *sw;
sw = tb_switch_alloc(parent_sw->tb, &parent_sw->dev, route);
if (!sw)
return;
sw->uuid = kmemdup(uuid, sizeof(*uuid), GFP_KERNEL);
sw->connection_id = connection_id;
sw->connection_key = connection_key;
sw->link = link;
sw->depth = depth;
sw->authorized = authorized;
sw->security_level = security_level;
sw->boot = boot;
/* Link the two switches now */
tb_port_at(route, parent_sw)->remote = tb_upstream_port(sw);
tb_upstream_port(sw)->remote = tb_port_at(route, parent_sw);
if (tb_switch_add(sw)) {
tb_port_at(tb_route(sw), parent_sw)->remote = NULL;
tb_switch_put(sw);
return;
}
}
static void update_switch(struct tb_switch *parent_sw, struct tb_switch *sw,
u64 route, u8 connection_id, u8 connection_key,
u8 link, u8 depth, bool boot)
{
/* Disconnect from parent */
tb_port_at(tb_route(sw), parent_sw)->remote = NULL;
/* Re-connect via updated port*/
tb_port_at(route, parent_sw)->remote = tb_upstream_port(sw);
/* Update with the new addressing information */
sw->config.route_hi = upper_32_bits(route);
sw->config.route_lo = lower_32_bits(route);
sw->connection_id = connection_id;
sw->connection_key = connection_key;
sw->link = link;
sw->depth = depth;
sw->boot = boot;
/* This switch still exists */
sw->is_unplugged = false;
}
static void remove_switch(struct tb_switch *sw)
{
struct tb_switch *parent_sw;
parent_sw = tb_to_switch(sw->dev.parent);
tb_port_at(tb_route(sw), parent_sw)->remote = NULL;
tb_switch_remove(sw);
}
static void add_xdomain(struct tb_switch *sw, u64 route,
const uuid_t *local_uuid, const uuid_t *remote_uuid,
u8 link, u8 depth)
{
struct tb_xdomain *xd;
xd = tb_xdomain_alloc(sw->tb, &sw->dev, route, local_uuid, remote_uuid);
if (!xd)
return;
xd->link = link;
xd->depth = depth;
tb_port_at(route, sw)->xdomain = xd;
tb_xdomain_add(xd);
}
static void update_xdomain(struct tb_xdomain *xd, u64 route, u8 link)
{
xd->link = link;
xd->route = route;
xd->is_unplugged = false;
}
static void remove_xdomain(struct tb_xdomain *xd)
{
struct tb_switch *sw;
sw = tb_to_switch(xd->dev.parent);
tb_port_at(xd->route, sw)->xdomain = NULL;
tb_xdomain_remove(xd);
}
static void
icm_fr_device_connected(struct tb *tb, const struct icm_pkg_header *hdr)
{
const struct icm_fr_event_device_connected *pkg =
(const struct icm_fr_event_device_connected *)hdr;
enum tb_security_level security_level;
struct tb_switch *sw, *parent_sw;
struct icm *icm = tb_priv(tb);
bool authorized = false;
struct tb_xdomain *xd;
u8 link, depth;
bool boot;
u64 route;
int ret;
link = pkg->link_info & ICM_LINK_INFO_LINK_MASK;
depth = (pkg->link_info & ICM_LINK_INFO_DEPTH_MASK) >>
ICM_LINK_INFO_DEPTH_SHIFT;
authorized = pkg->link_info & ICM_LINK_INFO_APPROVED;
security_level = (pkg->hdr.flags & ICM_FLAGS_SLEVEL_MASK) >>
ICM_FLAGS_SLEVEL_SHIFT;
boot = pkg->link_info & ICM_LINK_INFO_BOOT;
if (pkg->link_info & ICM_LINK_INFO_REJECTED) {
tb_info(tb, "switch at %u.%u was rejected by ICM firmware because topology limit exceeded\n",
link, depth);
return;
}
ret = icm->get_route(tb, link, depth, &route);
if (ret) {
tb_err(tb, "failed to find route string for switch at %u.%u\n",
link, depth);
return;
}
sw = tb_switch_find_by_uuid(tb, &pkg->ep_uuid);
if (sw) {
u8 phy_port, sw_phy_port;
parent_sw = tb_to_switch(sw->dev.parent);
sw_phy_port = phy_port_from_route(tb_route(sw), sw->depth);
phy_port = phy_port_from_route(route, depth);
/*
* On resume ICM will send us connected events for the
* devices that still are present. However, that
* information might have changed for example by the
* fact that a switch on a dual-link connection might
* have been enumerated using the other link now. Make
* sure our book keeping matches that.
*/
if (sw->depth == depth && sw_phy_port == phy_port &&
!!sw->authorized == authorized) {
update_switch(parent_sw, sw, route, pkg->connection_id,
pkg->connection_key, link, depth, boot);
tb_switch_put(sw);
return;
}
/*
* User connected the same switch to another physical
* port or to another part of the topology. Remove the
* existing switch now before adding the new one.
*/
remove_switch(sw);
tb_switch_put(sw);
}
/*
* If the switch was not found by UUID, look for a switch on
* same physical port (taking possible link aggregation into
* account) and depth. If we found one it is definitely a stale
* one so remove it first.
*/
sw = tb_switch_find_by_link_depth(tb, link, depth);
if (!sw) {
u8 dual_link;
dual_link = dual_link_from_link(link);
if (dual_link)
sw = tb_switch_find_by_link_depth(tb, dual_link, depth);
}
if (sw) {
remove_switch(sw);
tb_switch_put(sw);
}
/* Remove existing XDomain connection if found */
xd = tb_xdomain_find_by_link_depth(tb, link, depth);
if (xd) {
remove_xdomain(xd);
tb_xdomain_put(xd);
}
parent_sw = tb_switch_find_by_link_depth(tb, link, depth - 1);
if (!parent_sw) {
tb_err(tb, "failed to find parent switch for %u.%u\n",
link, depth);
return;
}
add_switch(parent_sw, route, &pkg->ep_uuid, pkg->connection_id,
pkg->connection_key, link, depth, security_level,
authorized, boot);
tb_switch_put(parent_sw);
}
static void
icm_fr_device_disconnected(struct tb *tb, const struct icm_pkg_header *hdr)
{
const struct icm_fr_event_device_disconnected *pkg =
(const struct icm_fr_event_device_disconnected *)hdr;
struct tb_switch *sw;
u8 link, depth;
link = pkg->link_info & ICM_LINK_INFO_LINK_MASK;
depth = (pkg->link_info & ICM_LINK_INFO_DEPTH_MASK) >>
ICM_LINK_INFO_DEPTH_SHIFT;
if (link > ICM_MAX_LINK || depth > ICM_MAX_DEPTH) {
tb_warn(tb, "invalid topology %u.%u, ignoring\n", link, depth);
return;
}
sw = tb_switch_find_by_link_depth(tb, link, depth);
if (!sw) {
tb_warn(tb, "no switch exists at %u.%u, ignoring\n", link,
depth);
return;
}
remove_switch(sw);
tb_switch_put(sw);
}
static void
icm_fr_xdomain_connected(struct tb *tb, const struct icm_pkg_header *hdr)
{
const struct icm_fr_event_xdomain_connected *pkg =
(const struct icm_fr_event_xdomain_connected *)hdr;
struct tb_xdomain *xd;
struct tb_switch *sw;
u8 link, depth;
bool approved;
u64 route;
/*
* After NVM upgrade adding root switch device fails because we
* initiated reset. During that time ICM might still send
* XDomain connected message which we ignore here.
*/
if (!tb->root_switch)
return;
link = pkg->link_info & ICM_LINK_INFO_LINK_MASK;
depth = (pkg->link_info & ICM_LINK_INFO_DEPTH_MASK) >>
ICM_LINK_INFO_DEPTH_SHIFT;
approved = pkg->link_info & ICM_LINK_INFO_APPROVED;
if (link > ICM_MAX_LINK || depth > ICM_MAX_DEPTH) {
tb_warn(tb, "invalid topology %u.%u, ignoring\n", link, depth);
return;
}
route = get_route(pkg->local_route_hi, pkg->local_route_lo);
xd = tb_xdomain_find_by_uuid(tb, &pkg->remote_uuid);
if (xd) {
u8 xd_phy_port, phy_port;
xd_phy_port = phy_port_from_route(xd->route, xd->depth);
phy_port = phy_port_from_route(route, depth);
if (xd->depth == depth && xd_phy_port == phy_port) {
update_xdomain(xd, route, link);
tb_xdomain_put(xd);
return;
}
/*
* If we find an existing XDomain connection remove it
* now. We need to go through login handshake and
* everything anyway to be able to re-establish the
* connection.
*/
remove_xdomain(xd);
tb_xdomain_put(xd);
}
/*
* Look if there already exists an XDomain in the same place
* than the new one and in that case remove it because it is
* most likely another host that got disconnected.
*/
xd = tb_xdomain_find_by_link_depth(tb, link, depth);
if (!xd) {
u8 dual_link;
dual_link = dual_link_from_link(link);
if (dual_link)
xd = tb_xdomain_find_by_link_depth(tb, dual_link,
depth);
}
if (xd) {
remove_xdomain(xd);
tb_xdomain_put(xd);
}
/*
* If the user disconnected a switch during suspend and
* connected another host to the same port, remove the switch
* first.
*/
sw = get_switch_at_route(tb->root_switch, route);
if (sw)
remove_switch(sw);
sw = tb_switch_find_by_link_depth(tb, link, depth);
if (!sw) {
tb_warn(tb, "no switch exists at %u.%u, ignoring\n", link,
depth);
return;
}
add_xdomain(sw, route, &pkg->local_uuid, &pkg->remote_uuid, link,
depth);
tb_switch_put(sw);
}
static void
icm_fr_xdomain_disconnected(struct tb *tb, const struct icm_pkg_header *hdr)
{
const struct icm_fr_event_xdomain_disconnected *pkg =
(const struct icm_fr_event_xdomain_disconnected *)hdr;
struct tb_xdomain *xd;
/*
* If the connection is through one or multiple devices, the
* XDomain device is removed along with them so it is fine if we
* cannot find it here.
*/
xd = tb_xdomain_find_by_uuid(tb, &pkg->remote_uuid);
if (xd) {
remove_xdomain(xd);
tb_xdomain_put(xd);
}
}
static int
icm_tr_driver_ready(struct tb *tb, enum tb_security_level *security_level,
size_t *nboot_acl)
{
struct icm_tr_pkg_driver_ready_response reply;
struct icm_pkg_driver_ready request = {
.hdr.code = ICM_DRIVER_READY,
};
int ret;
memset(&reply, 0, sizeof(reply));
ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
1, 20000);
if (ret)
return ret;
if (security_level)
*security_level = reply.info & ICM_TR_INFO_SLEVEL_MASK;
if (nboot_acl)
*nboot_acl = (reply.info & ICM_TR_INFO_BOOT_ACL_MASK) >>
ICM_TR_INFO_BOOT_ACL_SHIFT;
return 0;
}
static int icm_tr_approve_switch(struct tb *tb, struct tb_switch *sw)
{
struct icm_tr_pkg_approve_device request;
struct icm_tr_pkg_approve_device reply;
int ret;
memset(&request, 0, sizeof(request));
memcpy(&request.ep_uuid, sw->uuid, sizeof(request.ep_uuid));
request.hdr.code = ICM_APPROVE_DEVICE;
request.route_lo = sw->config.route_lo;
request.route_hi = sw->config.route_hi;
request.connection_id = sw->connection_id;
memset(&reply, 0, sizeof(reply));
ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
1, ICM_APPROVE_TIMEOUT);
if (ret)
return ret;
if (reply.hdr.flags & ICM_FLAGS_ERROR) {
tb_warn(tb, "PCIe tunnel creation failed\n");
return -EIO;
}
return 0;
}
static int icm_tr_add_switch_key(struct tb *tb, struct tb_switch *sw)
{
struct icm_tr_pkg_add_device_key_response reply;
struct icm_tr_pkg_add_device_key request;
int ret;
memset(&request, 0, sizeof(request));
memcpy(&request.ep_uuid, sw->uuid, sizeof(request.ep_uuid));
request.hdr.code = ICM_ADD_DEVICE_KEY;
request.route_lo = sw->config.route_lo;
request.route_hi = sw->config.route_hi;
request.connection_id = sw->connection_id;
memcpy(request.key, sw->key, TB_SWITCH_KEY_SIZE);
memset(&reply, 0, sizeof(reply));
ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
1, ICM_TIMEOUT);
if (ret)
return ret;
if (reply.hdr.flags & ICM_FLAGS_ERROR) {
tb_warn(tb, "Adding key to switch failed\n");
return -EIO;
}
return 0;
}
static int icm_tr_challenge_switch_key(struct tb *tb, struct tb_switch *sw,
const u8 *challenge, u8 *response)
{
struct icm_tr_pkg_challenge_device_response reply;
struct icm_tr_pkg_challenge_device request;
int ret;
memset(&request, 0, sizeof(request));
memcpy(&request.ep_uuid, sw->uuid, sizeof(request.ep_uuid));
request.hdr.code = ICM_CHALLENGE_DEVICE;
request.route_lo = sw->config.route_lo;
request.route_hi = sw->config.route_hi;
request.connection_id = sw->connection_id;
memcpy(request.challenge, challenge, TB_SWITCH_KEY_SIZE);
memset(&reply, 0, sizeof(reply));
ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
1, ICM_TIMEOUT);
if (ret)
return ret;
if (reply.hdr.flags & ICM_FLAGS_ERROR)
return -EKEYREJECTED;
if (reply.hdr.flags & ICM_FLAGS_NO_KEY)
return -ENOKEY;
memcpy(response, reply.response, TB_SWITCH_KEY_SIZE);
return 0;
}
static int icm_tr_approve_xdomain_paths(struct tb *tb, struct tb_xdomain *xd)
{
struct icm_tr_pkg_approve_xdomain_response reply;
struct icm_tr_pkg_approve_xdomain request;
int ret;
memset(&request, 0, sizeof(request));
request.hdr.code = ICM_APPROVE_XDOMAIN;
request.route_hi = upper_32_bits(xd->route);
request.route_lo = lower_32_bits(xd->route);
request.transmit_path = xd->transmit_path;
request.transmit_ring = xd->transmit_ring;
request.receive_path = xd->receive_path;
request.receive_ring = xd->receive_ring;
memcpy(&request.remote_uuid, xd->remote_uuid, sizeof(*xd->remote_uuid));
memset(&reply, 0, sizeof(reply));
ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
1, ICM_TIMEOUT);
if (ret)
return ret;
if (reply.hdr.flags & ICM_FLAGS_ERROR)
return -EIO;
return 0;
}
static int icm_tr_xdomain_tear_down(struct tb *tb, struct tb_xdomain *xd,
int stage)
{
struct icm_tr_pkg_disconnect_xdomain_response reply;
struct icm_tr_pkg_disconnect_xdomain request;
int ret;
memset(&request, 0, sizeof(request));
request.hdr.code = ICM_DISCONNECT_XDOMAIN;
request.stage = stage;
request.route_hi = upper_32_bits(xd->route);
request.route_lo = lower_32_bits(xd->route);
memcpy(&request.remote_uuid, xd->remote_uuid, sizeof(*xd->remote_uuid));
memset(&reply, 0, sizeof(reply));
ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
1, ICM_TIMEOUT);
if (ret)
return ret;
if (reply.hdr.flags & ICM_FLAGS_ERROR)
return -EIO;
return 0;
}
static int icm_tr_disconnect_xdomain_paths(struct tb *tb, struct tb_xdomain *xd)
{
int ret;
ret = icm_tr_xdomain_tear_down(tb, xd, 1);
if (ret)
return ret;
usleep_range(10, 50);
return icm_tr_xdomain_tear_down(tb, xd, 2);
}
static void
icm_tr_device_connected(struct tb *tb, const struct icm_pkg_header *hdr)
{
const struct icm_tr_event_device_connected *pkg =
(const struct icm_tr_event_device_connected *)hdr;
enum tb_security_level security_level;
struct tb_switch *sw, *parent_sw;
struct tb_xdomain *xd;
bool authorized, boot;
u64 route;
/*
* Currently we don't use the QoS information coming with the
* device connected message so simply just ignore that extra
* packet for now.
*/
if (pkg->hdr.packet_id)
return;
/*
* After NVM upgrade adding root switch device fails because we
* initiated reset. During that time ICM might still send device
* connected message which we ignore here.
*/
if (!tb->root_switch)
return;
route = get_route(pkg->route_hi, pkg->route_lo);
authorized = pkg->link_info & ICM_LINK_INFO_APPROVED;
security_level = (pkg->hdr.flags & ICM_FLAGS_SLEVEL_MASK) >>
ICM_FLAGS_SLEVEL_SHIFT;
boot = pkg->link_info & ICM_LINK_INFO_BOOT;
if (pkg->link_info & ICM_LINK_INFO_REJECTED) {
tb_info(tb, "switch at %llx was rejected by ICM firmware because topology limit exceeded\n",
route);
return;
}
sw = tb_switch_find_by_uuid(tb, &pkg->ep_uuid);
if (sw) {
/* Update the switch if it is still in the same place */
if (tb_route(sw) == route && !!sw->authorized == authorized) {
parent_sw = tb_to_switch(sw->dev.parent);
update_switch(parent_sw, sw, route, pkg->connection_id,
0, 0, 0, boot);
tb_switch_put(sw);
return;
}
remove_switch(sw);
tb_switch_put(sw);
}
/* Another switch with the same address */
sw = tb_switch_find_by_route(tb, route);
if (sw) {
remove_switch(sw);
tb_switch_put(sw);
}
/* XDomain connection with the same address */
xd = tb_xdomain_find_by_route(tb, route);
if (xd) {
remove_xdomain(xd);
tb_xdomain_put(xd);
}
parent_sw = tb_switch_find_by_route(tb, get_parent_route(route));
if (!parent_sw) {
tb_err(tb, "failed to find parent switch for %llx\n", route);
return;
}
add_switch(parent_sw, route, &pkg->ep_uuid, pkg->connection_id,
0, 0, 0, security_level, authorized, boot);
tb_switch_put(parent_sw);
}
static void
icm_tr_device_disconnected(struct tb *tb, const struct icm_pkg_header *hdr)
{
const struct icm_tr_event_device_disconnected *pkg =
(const struct icm_tr_event_device_disconnected *)hdr;
struct tb_switch *sw;
u64 route;
route = get_route(pkg->route_hi, pkg->route_lo);
sw = tb_switch_find_by_route(tb, route);
if (!sw) {
tb_warn(tb, "no switch exists at %llx, ignoring\n", route);
return;
}
remove_switch(sw);
tb_switch_put(sw);
}
static void
icm_tr_xdomain_connected(struct tb *tb, const struct icm_pkg_header *hdr)
{
const struct icm_tr_event_xdomain_connected *pkg =
(const struct icm_tr_event_xdomain_connected *)hdr;
struct tb_xdomain *xd;
struct tb_switch *sw;
u64 route;
if (!tb->root_switch)
return;
route = get_route(pkg->local_route_hi, pkg->local_route_lo);
xd = tb_xdomain_find_by_uuid(tb, &pkg->remote_uuid);
if (xd) {
if (xd->route == route) {
update_xdomain(xd, route, 0);
tb_xdomain_put(xd);
return;
}
remove_xdomain(xd);
tb_xdomain_put(xd);
}
/* An existing xdomain with the same address */
xd = tb_xdomain_find_by_route(tb, route);
if (xd) {
remove_xdomain(xd);
tb_xdomain_put(xd);
}
/*
* If the user disconnected a switch during suspend and
* connected another host to the same port, remove the switch
* first.
*/
sw = get_switch_at_route(tb->root_switch, route);
if (sw)
remove_switch(sw);
sw = tb_switch_find_by_route(tb, get_parent_route(route));
if (!sw) {
tb_warn(tb, "no switch exists at %llx, ignoring\n", route);
return;
}
add_xdomain(sw, route, &pkg->local_uuid, &pkg->remote_uuid, 0, 0);
tb_switch_put(sw);
}
static void
icm_tr_xdomain_disconnected(struct tb *tb, const struct icm_pkg_header *hdr)
{
const struct icm_tr_event_xdomain_disconnected *pkg =
(const struct icm_tr_event_xdomain_disconnected *)hdr;
struct tb_xdomain *xd;
u64 route;
route = get_route(pkg->route_hi, pkg->route_lo);
xd = tb_xdomain_find_by_route(tb, route);
if (xd) {
remove_xdomain(xd);
tb_xdomain_put(xd);
}
}
static struct pci_dev *get_upstream_port(struct pci_dev *pdev)
{
struct pci_dev *parent;
parent = pci_upstream_bridge(pdev);
while (parent) {
if (!pci_is_pcie(parent))
return NULL;
if (pci_pcie_type(parent) == PCI_EXP_TYPE_UPSTREAM)
break;
parent = pci_upstream_bridge(parent);
}
if (!parent)
return NULL;
switch (parent->device) {
case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_2C_BRIDGE:
case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_4C_BRIDGE:
case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_LP_BRIDGE:
case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_4C_BRIDGE:
case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_2C_BRIDGE:
return parent;
}
return NULL;
}
static bool icm_ar_is_supported(struct tb *tb)
{
struct pci_dev *upstream_port;
struct icm *icm = tb_priv(tb);
/*
* Starting from Alpine Ridge we can use ICM on Apple machines
* as well. We just need to reset and re-enable it first.
*/
if (!x86_apple_machine)
return true;
/*
* Find the upstream PCIe port in case we need to do reset
* through its vendor specific registers.
*/
upstream_port = get_upstream_port(tb->nhi->pdev);
if (upstream_port) {
int cap;
cap = pci_find_ext_capability(upstream_port,
PCI_EXT_CAP_ID_VNDR);
if (cap > 0) {
icm->upstream_port = upstream_port;
icm->vnd_cap = cap;
return true;
}
}
return false;
}
static int icm_ar_get_mode(struct tb *tb)
{
struct tb_nhi *nhi = tb->nhi;
int retries = 60;
u32 val;
do {
val = ioread32(nhi->iobase + REG_FW_STS);
if (val & REG_FW_STS_NVM_AUTH_DONE)
break;
msleep(50);
} while (--retries);
if (!retries) {
dev_err(&nhi->pdev->dev, "ICM firmware not authenticated\n");
return -ENODEV;
}
return nhi_mailbox_mode(nhi);
}
static int
icm_ar_driver_ready(struct tb *tb, enum tb_security_level *security_level,
size_t *nboot_acl)
{
struct icm_ar_pkg_driver_ready_response reply;
struct icm_pkg_driver_ready request = {
.hdr.code = ICM_DRIVER_READY,
};
int ret;
memset(&reply, 0, sizeof(reply));
ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
1, ICM_TIMEOUT);
if (ret)
return ret;
if (security_level)
*security_level = reply.info & ICM_AR_INFO_SLEVEL_MASK;
if (nboot_acl && (reply.info & ICM_AR_INFO_BOOT_ACL_SUPPORTED))
*nboot_acl = (reply.info & ICM_AR_INFO_BOOT_ACL_MASK) >>
ICM_AR_INFO_BOOT_ACL_SHIFT;
return 0;
}
static int icm_ar_get_route(struct tb *tb, u8 link, u8 depth, u64 *route)
{
struct icm_ar_pkg_get_route_response reply;
struct icm_ar_pkg_get_route request = {
.hdr = { .code = ICM_GET_ROUTE },
.link_info = depth << ICM_LINK_INFO_DEPTH_SHIFT | link,
};
int ret;
memset(&reply, 0, sizeof(reply));
ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
1, ICM_TIMEOUT);
if (ret)
return ret;
if (reply.hdr.flags & ICM_FLAGS_ERROR)
return -EIO;
*route = get_route(reply.route_hi, reply.route_lo);
return 0;
}
static int icm_ar_get_boot_acl(struct tb *tb, uuid_t *uuids, size_t nuuids)
{
struct icm_ar_pkg_preboot_acl_response reply;
struct icm_ar_pkg_preboot_acl request = {
.hdr = { .code = ICM_PREBOOT_ACL },
};
int ret, i;
memset(&reply, 0, sizeof(reply));
ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
1, ICM_TIMEOUT);
if (ret)
return ret;
if (reply.hdr.flags & ICM_FLAGS_ERROR)
return -EIO;
for (i = 0; i < nuuids; i++) {
u32 *uuid = (u32 *)&uuids[i];
uuid[0] = reply.acl[i].uuid_lo;
uuid[1] = reply.acl[i].uuid_hi;
if (uuid[0] == 0xffffffff && uuid[1] == 0xffffffff) {
/* Map empty entries to null UUID */
uuid[0] = 0;
uuid[1] = 0;
} else if (uuid[0] != 0 || uuid[1] != 0) {
/* Upper two DWs are always one's */
uuid[2] = 0xffffffff;
uuid[3] = 0xffffffff;
}
}
return ret;
}
static int icm_ar_set_boot_acl(struct tb *tb, const uuid_t *uuids,
size_t nuuids)
{
struct icm_ar_pkg_preboot_acl_response reply;
struct icm_ar_pkg_preboot_acl request = {
.hdr = {
.code = ICM_PREBOOT_ACL,
.flags = ICM_FLAGS_WRITE,
},
};
int ret, i;
for (i = 0; i < nuuids; i++) {
const u32 *uuid = (const u32 *)&uuids[i];
if (uuid_is_null(&uuids[i])) {
/*
* Map null UUID to the empty (all one) entries
* for ICM.
*/
request.acl[i].uuid_lo = 0xffffffff;
request.acl[i].uuid_hi = 0xffffffff;
} else {
/* Two high DWs need to be set to all one */
if (uuid[2] != 0xffffffff || uuid[3] != 0xffffffff)
return -EINVAL;
request.acl[i].uuid_lo = uuid[0];
request.acl[i].uuid_hi = uuid[1];
}
}
memset(&reply, 0, sizeof(reply));
ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
1, ICM_TIMEOUT);
if (ret)
return ret;
if (reply.hdr.flags & ICM_FLAGS_ERROR)
return -EIO;
return 0;
}
static void icm_handle_notification(struct work_struct *work)
{
struct icm_notification *n = container_of(work, typeof(*n), work);
struct tb *tb = n->tb;
struct icm *icm = tb_priv(tb);
mutex_lock(&tb->lock);
switch (n->pkg->code) {
case ICM_EVENT_DEVICE_CONNECTED:
icm->device_connected(tb, n->pkg);
break;
case ICM_EVENT_DEVICE_DISCONNECTED:
icm->device_disconnected(tb, n->pkg);
break;
case ICM_EVENT_XDOMAIN_CONNECTED:
icm->xdomain_connected(tb, n->pkg);
break;
case ICM_EVENT_XDOMAIN_DISCONNECTED:
icm->xdomain_disconnected(tb, n->pkg);
break;
}
mutex_unlock(&tb->lock);
kfree(n->pkg);
kfree(n);
}
static void icm_handle_event(struct tb *tb, enum tb_cfg_pkg_type type,
const void *buf, size_t size)
{
struct icm_notification *n;
n = kmalloc(sizeof(*n), GFP_KERNEL);
if (!n)
return;
INIT_WORK(&n->work, icm_handle_notification);
n->pkg = kmemdup(buf, size, GFP_KERNEL);
n->tb = tb;
queue_work(tb->wq, &n->work);
}
static int
__icm_driver_ready(struct tb *tb, enum tb_security_level *security_level,
size_t *nboot_acl)
{
struct icm *icm = tb_priv(tb);
unsigned int retries = 50;
int ret;
ret = icm->driver_ready(tb, security_level, nboot_acl);
if (ret) {
tb_err(tb, "failed to send driver ready to ICM\n");
return ret;
}
/*
* Hold on here until the switch config space is accessible so
* that we can read root switch config successfully.
*/
do {
struct tb_cfg_result res;
u32 tmp;
res = tb_cfg_read_raw(tb->ctl, &tmp, 0, 0, TB_CFG_SWITCH,
0, 1, 100);
if (!res.err)
return 0;
msleep(50);
} while (--retries);
tb_err(tb, "failed to read root switch config space, giving up\n");
return -ETIMEDOUT;
}
static int pci2cio_wait_completion(struct icm *icm, unsigned long timeout_msec)
{
unsigned long end = jiffies + msecs_to_jiffies(timeout_msec);
u32 cmd;
do {
pci_read_config_dword(icm->upstream_port,
icm->vnd_cap + PCIE2CIO_CMD, &cmd);
if (!(cmd & PCIE2CIO_CMD_START)) {
if (cmd & PCIE2CIO_CMD_TIMEOUT)
break;
return 0;
}
msleep(50);
} while (time_before(jiffies, end));
return -ETIMEDOUT;
}
static int pcie2cio_read(struct icm *icm, enum tb_cfg_space cs,
unsigned int port, unsigned int index, u32 *data)
{
struct pci_dev *pdev = icm->upstream_port;
int ret, vnd_cap = icm->vnd_cap;
u32 cmd;
cmd = index;
cmd |= (port << PCIE2CIO_CMD_PORT_SHIFT) & PCIE2CIO_CMD_PORT_MASK;
cmd |= (cs << PCIE2CIO_CMD_CS_SHIFT) & PCIE2CIO_CMD_CS_MASK;
cmd |= PCIE2CIO_CMD_START;
pci_write_config_dword(pdev, vnd_cap + PCIE2CIO_CMD, cmd);
ret = pci2cio_wait_completion(icm, 5000);
if (ret)
return ret;
pci_read_config_dword(pdev, vnd_cap + PCIE2CIO_RDDATA, data);
return 0;
}
static int pcie2cio_write(struct icm *icm, enum tb_cfg_space cs,
unsigned int port, unsigned int index, u32 data)
{
struct pci_dev *pdev = icm->upstream_port;
int vnd_cap = icm->vnd_cap;
u32 cmd;
pci_write_config_dword(pdev, vnd_cap + PCIE2CIO_WRDATA, data);
cmd = index;
cmd |= (port << PCIE2CIO_CMD_PORT_SHIFT) & PCIE2CIO_CMD_PORT_MASK;
cmd |= (cs << PCIE2CIO_CMD_CS_SHIFT) & PCIE2CIO_CMD_CS_MASK;
cmd |= PCIE2CIO_CMD_WRITE | PCIE2CIO_CMD_START;
pci_write_config_dword(pdev, vnd_cap + PCIE2CIO_CMD, cmd);
return pci2cio_wait_completion(icm, 5000);
}
static int icm_firmware_reset(struct tb *tb, struct tb_nhi *nhi)
{
struct icm *icm = tb_priv(tb);
u32 val;
if (!icm->upstream_port)
return -ENODEV;
/* Put ARC to wait for CIO reset event to happen */
val = ioread32(nhi->iobase + REG_FW_STS);
val |= REG_FW_STS_CIO_RESET_REQ;
iowrite32(val, nhi->iobase + REG_FW_STS);
/* Re-start ARC */
val = ioread32(nhi->iobase + REG_FW_STS);
val |= REG_FW_STS_ICM_EN_INVERT;
val |= REG_FW_STS_ICM_EN_CPU;
iowrite32(val, nhi->iobase + REG_FW_STS);
/* Trigger CIO reset now */
return pcie2cio_write(icm, TB_CFG_SWITCH, 0, 0x50, BIT(9));
}
static int icm_firmware_start(struct tb *tb, struct tb_nhi *nhi)
{
unsigned int retries = 10;
int ret;
u32 val;
/* Check if the ICM firmware is already running */
val = ioread32(nhi->iobase + REG_FW_STS);
if (val & REG_FW_STS_ICM_EN)
return 0;
dev_info(&nhi->pdev->dev, "starting ICM firmware\n");
ret = icm_firmware_reset(tb, nhi);
if (ret)
return ret;
/* Wait until the ICM firmware tells us it is up and running */
do {
/* Check that the ICM firmware is running */
val = ioread32(nhi->iobase + REG_FW_STS);
if (val & REG_FW_STS_NVM_AUTH_DONE)
return 0;
msleep(300);
} while (--retries);
return -ETIMEDOUT;
}
static int icm_reset_phy_port(struct tb *tb, int phy_port)
{
struct icm *icm = tb_priv(tb);
u32 state0, state1;
int port0, port1;
u32 val0, val1;
int ret;
if (!icm->upstream_port)
return 0;
if (phy_port) {
port0 = 3;
port1 = 4;
} else {
port0 = 1;
port1 = 2;
}
/*
* Read link status of both null ports belonging to a single
* physical port.
*/
ret = pcie2cio_read(icm, TB_CFG_PORT, port0, PHY_PORT_CS1, &val0);
if (ret)
return ret;
ret = pcie2cio_read(icm, TB_CFG_PORT, port1, PHY_PORT_CS1, &val1);
if (ret)
return ret;
state0 = val0 & PHY_PORT_CS1_LINK_STATE_MASK;
state0 >>= PHY_PORT_CS1_LINK_STATE_SHIFT;
state1 = val1 & PHY_PORT_CS1_LINK_STATE_MASK;
state1 >>= PHY_PORT_CS1_LINK_STATE_SHIFT;
/* If they are both up we need to reset them now */
if (state0 != TB_PORT_UP || state1 != TB_PORT_UP)
return 0;
val0 |= PHY_PORT_CS1_LINK_DISABLE;
ret = pcie2cio_write(icm, TB_CFG_PORT, port0, PHY_PORT_CS1, val0);
if (ret)
return ret;
val1 |= PHY_PORT_CS1_LINK_DISABLE;
ret = pcie2cio_write(icm, TB_CFG_PORT, port1, PHY_PORT_CS1, val1);
if (ret)
return ret;
/* Wait a bit and then re-enable both ports */
usleep_range(10, 100);
ret = pcie2cio_read(icm, TB_CFG_PORT, port0, PHY_PORT_CS1, &val0);
if (ret)
return ret;
ret = pcie2cio_read(icm, TB_CFG_PORT, port1, PHY_PORT_CS1, &val1);
if (ret)
return ret;
val0 &= ~PHY_PORT_CS1_LINK_DISABLE;
ret = pcie2cio_write(icm, TB_CFG_PORT, port0, PHY_PORT_CS1, val0);
if (ret)
return ret;
val1 &= ~PHY_PORT_CS1_LINK_DISABLE;
return pcie2cio_write(icm, TB_CFG_PORT, port1, PHY_PORT_CS1, val1);
}
static int icm_firmware_init(struct tb *tb)
{
struct icm *icm = tb_priv(tb);
struct tb_nhi *nhi = tb->nhi;
int ret;
ret = icm_firmware_start(tb, nhi);
if (ret) {
dev_err(&nhi->pdev->dev, "could not start ICM firmware\n");
return ret;
}
if (icm->get_mode) {
ret = icm->get_mode(tb);
switch (ret) {
case NHI_FW_SAFE_MODE:
icm->safe_mode = true;
break;
case NHI_FW_CM_MODE:
/* Ask ICM to accept all Thunderbolt devices */
nhi_mailbox_cmd(nhi, NHI_MAILBOX_ALLOW_ALL_DEVS, 0);
break;
default:
if (ret < 0)
return ret;
tb_err(tb, "ICM firmware is in wrong mode: %u\n", ret);
return -ENODEV;
}
}
/*
* Reset both physical ports if there is anything connected to
* them already.
*/
ret = icm_reset_phy_port(tb, 0);
if (ret)
dev_warn(&nhi->pdev->dev, "failed to reset links on port0\n");
ret = icm_reset_phy_port(tb, 1);
if (ret)
dev_warn(&nhi->pdev->dev, "failed to reset links on port1\n");
return 0;
}
static int icm_driver_ready(struct tb *tb)
{
struct icm *icm = tb_priv(tb);
int ret;
ret = icm_firmware_init(tb);
if (ret)
return ret;
if (icm->safe_mode) {
tb_info(tb, "Thunderbolt host controller is in safe mode.\n");
tb_info(tb, "You need to update NVM firmware of the controller before it can be used.\n");
tb_info(tb, "For latest updates check https://thunderbolttechnology.net/updates.\n");
return 0;
}
ret = __icm_driver_ready(tb, &tb->security_level, &tb->nboot_acl);
if (ret)
return ret;
/*
* Make sure the number of supported preboot ACL matches what we
* expect or disable the whole feature.
*/
if (tb->nboot_acl > icm->max_boot_acl)
tb->nboot_acl = 0;
return 0;
}
static int icm_suspend(struct tb *tb)
{
int ret;
ret = nhi_mailbox_cmd(tb->nhi, NHI_MAILBOX_SAVE_DEVS, 0);
if (ret)
tb_info(tb, "Ignoring mailbox command error (%d) in %s\n",
ret, __func__);
return 0;
}
/*
* Mark all switches (except root switch) below this one unplugged. ICM
* firmware will send us an updated list of switches after we have send
* it driver ready command. If a switch is not in that list it will be
* removed when we perform rescan.
*/
static void icm_unplug_children(struct tb_switch *sw)
{
unsigned int i;
if (tb_route(sw))
sw->is_unplugged = true;
for (i = 1; i <= sw->config.max_port_number; i++) {
struct tb_port *port = &sw->ports[i];
if (tb_is_upstream_port(port))
continue;
if (port->xdomain) {
port->xdomain->is_unplugged = true;
continue;
}
if (!port->remote)
continue;
icm_unplug_children(port->remote->sw);
}
}
static void icm_free_unplugged_children(struct tb_switch *sw)
{
unsigned int i;
for (i = 1; i <= sw->config.max_port_number; i++) {
struct tb_port *port = &sw->ports[i];
if (tb_is_upstream_port(port))
continue;
if (port->xdomain && port->xdomain->is_unplugged) {
tb_xdomain_remove(port->xdomain);
port->xdomain = NULL;
continue;
}
if (!port->remote)
continue;
if (port->remote->sw->is_unplugged) {
tb_switch_remove(port->remote->sw);
port->remote = NULL;
} else {
icm_free_unplugged_children(port->remote->sw);
}
}
}
static void icm_rescan_work(struct work_struct *work)
{
struct icm *icm = container_of(work, struct icm, rescan_work.work);
struct tb *tb = icm_to_tb(icm);
mutex_lock(&tb->lock);
if (tb->root_switch)
icm_free_unplugged_children(tb->root_switch);
mutex_unlock(&tb->lock);
}
static void icm_complete(struct tb *tb)
{
struct icm *icm = tb_priv(tb);
if (tb->nhi->going_away)
return;
icm_unplug_children(tb->root_switch);
/*
* Now all existing children should be resumed, start events
* from ICM to get updated status.
*/
__icm_driver_ready(tb, NULL, NULL);
/*
* We do not get notifications of devices that have been
* unplugged during suspend so schedule rescan to clean them up
* if any.
*/
queue_delayed_work(tb->wq, &icm->rescan_work, msecs_to_jiffies(500));
}
static int icm_start(struct tb *tb)
{
struct icm *icm = tb_priv(tb);
int ret;
if (icm->safe_mode)
tb->root_switch = tb_switch_alloc_safe_mode(tb, &tb->dev, 0);
else
tb->root_switch = tb_switch_alloc(tb, &tb->dev, 0);
if (!tb->root_switch)
return -ENODEV;
/*
* NVM upgrade has not been tested on Apple systems and they
* don't provide images publicly either. To be on the safe side
* prevent root switch NVM upgrade on Macs for now.
*/
tb->root_switch->no_nvm_upgrade = x86_apple_machine;
ret = tb_switch_add(tb->root_switch);
if (ret) {
tb_switch_put(tb->root_switch);
tb->root_switch = NULL;
}
return ret;
}
static void icm_stop(struct tb *tb)
{
struct icm *icm = tb_priv(tb);
cancel_delayed_work(&icm->rescan_work);
tb_switch_remove(tb->root_switch);
tb->root_switch = NULL;
nhi_mailbox_cmd(tb->nhi, NHI_MAILBOX_DRV_UNLOADS, 0);
}
static int icm_disconnect_pcie_paths(struct tb *tb)
{
return nhi_mailbox_cmd(tb->nhi, NHI_MAILBOX_DISCONNECT_PCIE_PATHS, 0);
}
/* Falcon Ridge */
static const struct tb_cm_ops icm_fr_ops = {
.driver_ready = icm_driver_ready,
.start = icm_start,
.stop = icm_stop,
.suspend = icm_suspend,
.complete = icm_complete,
.handle_event = icm_handle_event,
.approve_switch = icm_fr_approve_switch,
.add_switch_key = icm_fr_add_switch_key,
.challenge_switch_key = icm_fr_challenge_switch_key,
.disconnect_pcie_paths = icm_disconnect_pcie_paths,
.approve_xdomain_paths = icm_fr_approve_xdomain_paths,
.disconnect_xdomain_paths = icm_fr_disconnect_xdomain_paths,
};
/* Alpine Ridge */
static const struct tb_cm_ops icm_ar_ops = {
.driver_ready = icm_driver_ready,
.start = icm_start,
.stop = icm_stop,
.suspend = icm_suspend,
.complete = icm_complete,
.handle_event = icm_handle_event,
.get_boot_acl = icm_ar_get_boot_acl,
.set_boot_acl = icm_ar_set_boot_acl,
.approve_switch = icm_fr_approve_switch,
.add_switch_key = icm_fr_add_switch_key,
.challenge_switch_key = icm_fr_challenge_switch_key,
.disconnect_pcie_paths = icm_disconnect_pcie_paths,
.approve_xdomain_paths = icm_fr_approve_xdomain_paths,
.disconnect_xdomain_paths = icm_fr_disconnect_xdomain_paths,
};
/* Titan Ridge */
static const struct tb_cm_ops icm_tr_ops = {
.driver_ready = icm_driver_ready,
.start = icm_start,
.stop = icm_stop,
.suspend = icm_suspend,
.complete = icm_complete,
.handle_event = icm_handle_event,
.get_boot_acl = icm_ar_get_boot_acl,
.set_boot_acl = icm_ar_set_boot_acl,
.approve_switch = icm_tr_approve_switch,
.add_switch_key = icm_tr_add_switch_key,
.challenge_switch_key = icm_tr_challenge_switch_key,
.disconnect_pcie_paths = icm_disconnect_pcie_paths,
.approve_xdomain_paths = icm_tr_approve_xdomain_paths,
.disconnect_xdomain_paths = icm_tr_disconnect_xdomain_paths,
};
struct tb *icm_probe(struct tb_nhi *nhi)
{
struct icm *icm;
struct tb *tb;
tb = tb_domain_alloc(nhi, sizeof(struct icm));
if (!tb)
return NULL;
icm = tb_priv(tb);
INIT_DELAYED_WORK(&icm->rescan_work, icm_rescan_work);
mutex_init(&icm->request_lock);
switch (nhi->pdev->device) {
case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_2C_NHI:
case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_4C_NHI:
icm->is_supported = icm_fr_is_supported;
icm->get_route = icm_fr_get_route;
icm->driver_ready = icm_fr_driver_ready;
icm->device_connected = icm_fr_device_connected;
icm->device_disconnected = icm_fr_device_disconnected;
icm->xdomain_connected = icm_fr_xdomain_connected;
icm->xdomain_disconnected = icm_fr_xdomain_disconnected;
tb->cm_ops = &icm_fr_ops;
break;
case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_2C_NHI:
case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_4C_NHI:
case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_LP_NHI:
case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_4C_NHI:
case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_2C_NHI:
icm->max_boot_acl = ICM_AR_PREBOOT_ACL_ENTRIES;
icm->is_supported = icm_ar_is_supported;
icm->get_mode = icm_ar_get_mode;
icm->get_route = icm_ar_get_route;
icm->driver_ready = icm_ar_driver_ready;
icm->device_connected = icm_fr_device_connected;
icm->device_disconnected = icm_fr_device_disconnected;
icm->xdomain_connected = icm_fr_xdomain_connected;
icm->xdomain_disconnected = icm_fr_xdomain_disconnected;
tb->cm_ops = &icm_ar_ops;
break;
case PCI_DEVICE_ID_INTEL_TITAN_RIDGE_2C_NHI:
case PCI_DEVICE_ID_INTEL_TITAN_RIDGE_4C_NHI:
icm->max_boot_acl = ICM_AR_PREBOOT_ACL_ENTRIES;
icm->is_supported = icm_ar_is_supported;
icm->get_mode = icm_ar_get_mode;
icm->driver_ready = icm_tr_driver_ready;
icm->device_connected = icm_tr_device_connected;
icm->device_disconnected = icm_tr_device_disconnected;
icm->xdomain_connected = icm_tr_xdomain_connected;
icm->xdomain_disconnected = icm_tr_xdomain_disconnected;
tb->cm_ops = &icm_tr_ops;
break;
}
if (!icm->is_supported || !icm->is_supported(tb)) {
dev_dbg(&nhi->pdev->dev, "ICM not supported on this controller\n");
tb_domain_put(tb);
return NULL;
}
return tb;
}