mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-05 10:04:12 +08:00
e6b245ccd5
Starting from Intel Falcon Ridge the NVM firmware can be upgraded by using DMA configuration based mailbox commands. If we detect that the host or device (device support starts from Intel Alpine Ridge) has the DMA configuration based mailbox we expose NVM information to the userspace as two separate Linux NVMem devices: nvm_active and nvm_non_active. The former is read-only portion of the active NVM which firmware upgrade tools can be use to find out suitable NVM image if the device identification strings are not enough. The latter is write-only portion where the new NVM image is to be written by the userspace. It is up to the userspace to find out right NVM image (the kernel does very minimal validation). The ICM firmware itself authenticates the new NVM firmware and fails the operation if it is not what is expected. We also expose two new sysfs files per each switch: nvm_version and nvm_authenticate which can be used to read the active NVM version and start the upgrade process. We also introduce safe mode which is the mode a switch goes when it does not have properly authenticated firmware. In this mode the switch only accepts a couple of commands including flashing a new NVM firmware image and triggering power cycle. This code is based on the work done by Amir Levy and Michael Jamet. Signed-off-by: Michael Jamet <michael.jamet@intel.com> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Yehezkel Bernat <yehezkel.bernat@intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
475 lines
14 KiB
C
475 lines
14 KiB
C
/*
|
|
* Thunderbolt Cactus Ridge driver - bus logic (NHI independent)
|
|
*
|
|
* Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
|
|
*/
|
|
|
|
#ifndef TB_H_
|
|
#define TB_H_
|
|
|
|
#include <linux/nvmem-provider.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/uuid.h>
|
|
|
|
#include "tb_regs.h"
|
|
#include "ctl.h"
|
|
#include "dma_port.h"
|
|
|
|
/**
|
|
* struct tb_switch_nvm - Structure holding switch NVM information
|
|
* @major: Major version number of the active NVM portion
|
|
* @minor: Minor version number of the active NVM portion
|
|
* @id: Identifier used with both NVM portions
|
|
* @active: Active portion NVMem device
|
|
* @non_active: Non-active portion NVMem device
|
|
* @buf: Buffer where the NVM image is stored before it is written to
|
|
* the actual NVM flash device
|
|
* @buf_data_size: Number of bytes actually consumed by the new NVM
|
|
* image
|
|
* @authenticating: The switch is authenticating the new NVM
|
|
*/
|
|
struct tb_switch_nvm {
|
|
u8 major;
|
|
u8 minor;
|
|
int id;
|
|
struct nvmem_device *active;
|
|
struct nvmem_device *non_active;
|
|
void *buf;
|
|
size_t buf_data_size;
|
|
bool authenticating;
|
|
};
|
|
|
|
/**
|
|
* enum tb_security_level - Thunderbolt security level
|
|
* @TB_SECURITY_NONE: No security, legacy mode
|
|
* @TB_SECURITY_USER: User approval required at minimum
|
|
* @TB_SECURITY_SECURE: One time saved key required at minimum
|
|
* @TB_SECURITY_DPONLY: Only tunnel Display port (and USB)
|
|
*/
|
|
enum tb_security_level {
|
|
TB_SECURITY_NONE,
|
|
TB_SECURITY_USER,
|
|
TB_SECURITY_SECURE,
|
|
TB_SECURITY_DPONLY,
|
|
};
|
|
|
|
#define TB_SWITCH_KEY_SIZE 32
|
|
/* Each physical port contains 2 links on modern controllers */
|
|
#define TB_SWITCH_LINKS_PER_PHY_PORT 2
|
|
|
|
/**
|
|
* struct tb_switch - a thunderbolt switch
|
|
* @dev: Device for the switch
|
|
* @config: Switch configuration
|
|
* @ports: Ports in this switch
|
|
* @dma_port: If the switch has port supporting DMA configuration based
|
|
* mailbox this will hold the pointer to that (%NULL
|
|
* otherwise). If set it also means the switch has
|
|
* upgradeable NVM.
|
|
* @tb: Pointer to the domain the switch belongs to
|
|
* @uid: Unique ID of the switch
|
|
* @uuid: UUID of the switch (or %NULL if not supported)
|
|
* @vendor: Vendor ID of the switch
|
|
* @device: Device ID of the switch
|
|
* @vendor_name: Name of the vendor (or %NULL if not known)
|
|
* @device_name: Name of the device (or %NULL if not known)
|
|
* @generation: Switch Thunderbolt generation
|
|
* @cap_plug_events: Offset to the plug events capability (%0 if not found)
|
|
* @is_unplugged: The switch is going away
|
|
* @drom: DROM of the switch (%NULL if not found)
|
|
* @nvm: Pointer to the NVM if the switch has one (%NULL otherwise)
|
|
* @no_nvm_upgrade: Prevent NVM upgrade of this switch
|
|
* @safe_mode: The switch is in safe-mode
|
|
* @authorized: Whether the switch is authorized by user or policy
|
|
* @work: Work used to automatically authorize a switch
|
|
* @security_level: Switch supported security level
|
|
* @key: Contains the key used to challenge the device or %NULL if not
|
|
* supported. Size of the key is %TB_SWITCH_KEY_SIZE.
|
|
* @connection_id: Connection ID used with ICM messaging
|
|
* @connection_key: Connection key used with ICM messaging
|
|
* @link: Root switch link this switch is connected (ICM only)
|
|
* @depth: Depth in the chain this switch is connected (ICM only)
|
|
*
|
|
* When the switch is being added or removed to the domain (other
|
|
* switches) you need to have domain lock held. For switch authorization
|
|
* internal switch_lock is enough.
|
|
*/
|
|
struct tb_switch {
|
|
struct device dev;
|
|
struct tb_regs_switch_header config;
|
|
struct tb_port *ports;
|
|
struct tb_dma_port *dma_port;
|
|
struct tb *tb;
|
|
u64 uid;
|
|
uuid_be *uuid;
|
|
u16 vendor;
|
|
u16 device;
|
|
const char *vendor_name;
|
|
const char *device_name;
|
|
unsigned int generation;
|
|
int cap_plug_events;
|
|
bool is_unplugged;
|
|
u8 *drom;
|
|
struct tb_switch_nvm *nvm;
|
|
bool no_nvm_upgrade;
|
|
bool safe_mode;
|
|
unsigned int authorized;
|
|
struct work_struct work;
|
|
enum tb_security_level security_level;
|
|
u8 *key;
|
|
u8 connection_id;
|
|
u8 connection_key;
|
|
u8 link;
|
|
u8 depth;
|
|
};
|
|
|
|
/**
|
|
* struct tb_port - a thunderbolt port, part of a tb_switch
|
|
*/
|
|
struct tb_port {
|
|
struct tb_regs_port_header config;
|
|
struct tb_switch *sw;
|
|
struct tb_port *remote; /* remote port, NULL if not connected */
|
|
int cap_phy; /* offset, zero if not found */
|
|
u8 port; /* port number on switch */
|
|
bool disabled; /* disabled by eeprom */
|
|
struct tb_port *dual_link_port;
|
|
u8 link_nr:1;
|
|
};
|
|
|
|
/**
|
|
* struct tb_path_hop - routing information for a tb_path
|
|
*
|
|
* Hop configuration is always done on the IN port of a switch.
|
|
* in_port and out_port have to be on the same switch. Packets arriving on
|
|
* in_port with "hop" = in_hop_index will get routed to through out_port. The
|
|
* next hop to take (on out_port->remote) is determined by next_hop_index.
|
|
*
|
|
* in_counter_index is the index of a counter (in TB_CFG_COUNTERS) on the in
|
|
* port.
|
|
*/
|
|
struct tb_path_hop {
|
|
struct tb_port *in_port;
|
|
struct tb_port *out_port;
|
|
int in_hop_index;
|
|
int in_counter_index; /* write -1 to disable counters for this hop. */
|
|
int next_hop_index;
|
|
};
|
|
|
|
/**
|
|
* enum tb_path_port - path options mask
|
|
*/
|
|
enum tb_path_port {
|
|
TB_PATH_NONE = 0,
|
|
TB_PATH_SOURCE = 1, /* activate on the first hop (out of src) */
|
|
TB_PATH_INTERNAL = 2, /* activate on other hops (not the first/last) */
|
|
TB_PATH_DESTINATION = 4, /* activate on the last hop (into dst) */
|
|
TB_PATH_ALL = 7,
|
|
};
|
|
|
|
/**
|
|
* struct tb_path - a unidirectional path between two ports
|
|
*
|
|
* A path consists of a number of hops (see tb_path_hop). To establish a PCIe
|
|
* tunnel two paths have to be created between the two PCIe ports.
|
|
*
|
|
*/
|
|
struct tb_path {
|
|
struct tb *tb;
|
|
int nfc_credits; /* non flow controlled credits */
|
|
enum tb_path_port ingress_shared_buffer;
|
|
enum tb_path_port egress_shared_buffer;
|
|
enum tb_path_port ingress_fc_enable;
|
|
enum tb_path_port egress_fc_enable;
|
|
|
|
int priority:3;
|
|
int weight:4;
|
|
bool drop_packages;
|
|
bool activated;
|
|
struct tb_path_hop *hops;
|
|
int path_length; /* number of hops */
|
|
};
|
|
|
|
/**
|
|
* struct tb_cm_ops - Connection manager specific operations vector
|
|
* @driver_ready: Called right after control channel is started. Used by
|
|
* ICM to send driver ready message to the firmware.
|
|
* @start: Starts the domain
|
|
* @stop: Stops the domain
|
|
* @suspend_noirq: Connection manager specific suspend_noirq
|
|
* @resume_noirq: Connection manager specific resume_noirq
|
|
* @suspend: Connection manager specific suspend
|
|
* @complete: Connection manager specific complete
|
|
* @handle_event: Handle thunderbolt event
|
|
* @approve_switch: Approve switch
|
|
* @add_switch_key: Add key to switch
|
|
* @challenge_switch_key: Challenge switch using key
|
|
* @disconnect_pcie_paths: Disconnects PCIe paths before NVM update
|
|
*/
|
|
struct tb_cm_ops {
|
|
int (*driver_ready)(struct tb *tb);
|
|
int (*start)(struct tb *tb);
|
|
void (*stop)(struct tb *tb);
|
|
int (*suspend_noirq)(struct tb *tb);
|
|
int (*resume_noirq)(struct tb *tb);
|
|
int (*suspend)(struct tb *tb);
|
|
void (*complete)(struct tb *tb);
|
|
void (*handle_event)(struct tb *tb, enum tb_cfg_pkg_type,
|
|
const void *buf, size_t size);
|
|
int (*approve_switch)(struct tb *tb, struct tb_switch *sw);
|
|
int (*add_switch_key)(struct tb *tb, struct tb_switch *sw);
|
|
int (*challenge_switch_key)(struct tb *tb, struct tb_switch *sw,
|
|
const u8 *challenge, u8 *response);
|
|
int (*disconnect_pcie_paths)(struct tb *tb);
|
|
};
|
|
|
|
/**
|
|
* struct tb - main thunderbolt bus structure
|
|
* @dev: Domain device
|
|
* @lock: Big lock. Must be held when accessing any struct
|
|
* tb_switch / struct tb_port.
|
|
* @nhi: Pointer to the NHI structure
|
|
* @ctl: Control channel for this domain
|
|
* @wq: Ordered workqueue for all domain specific work
|
|
* @root_switch: Root switch of this domain
|
|
* @cm_ops: Connection manager specific operations vector
|
|
* @index: Linux assigned domain number
|
|
* @security_level: Current security level
|
|
* @privdata: Private connection manager specific data
|
|
*/
|
|
struct tb {
|
|
struct device dev;
|
|
struct mutex lock;
|
|
struct tb_nhi *nhi;
|
|
struct tb_ctl *ctl;
|
|
struct workqueue_struct *wq;
|
|
struct tb_switch *root_switch;
|
|
const struct tb_cm_ops *cm_ops;
|
|
int index;
|
|
enum tb_security_level security_level;
|
|
unsigned long privdata[0];
|
|
};
|
|
|
|
static inline void *tb_priv(struct tb *tb)
|
|
{
|
|
return (void *)tb->privdata;
|
|
}
|
|
|
|
/* helper functions & macros */
|
|
|
|
/**
|
|
* tb_upstream_port() - return the upstream port of a switch
|
|
*
|
|
* Every switch has an upstream port (for the root switch it is the NHI).
|
|
*
|
|
* During switch alloc/init tb_upstream_port()->remote may be NULL, even for
|
|
* non root switches (on the NHI port remote is always NULL).
|
|
*
|
|
* Return: Returns the upstream port of the switch.
|
|
*/
|
|
static inline struct tb_port *tb_upstream_port(struct tb_switch *sw)
|
|
{
|
|
return &sw->ports[sw->config.upstream_port_number];
|
|
}
|
|
|
|
static inline u64 tb_route(struct tb_switch *sw)
|
|
{
|
|
return ((u64) sw->config.route_hi) << 32 | sw->config.route_lo;
|
|
}
|
|
|
|
static inline struct tb_port *tb_port_at(u64 route, struct tb_switch *sw)
|
|
{
|
|
u8 port;
|
|
|
|
port = route >> (sw->config.depth * 8);
|
|
if (WARN_ON(port > sw->config.max_port_number))
|
|
return NULL;
|
|
return &sw->ports[port];
|
|
}
|
|
|
|
static inline int tb_sw_read(struct tb_switch *sw, void *buffer,
|
|
enum tb_cfg_space space, u32 offset, u32 length)
|
|
{
|
|
return tb_cfg_read(sw->tb->ctl,
|
|
buffer,
|
|
tb_route(sw),
|
|
0,
|
|
space,
|
|
offset,
|
|
length);
|
|
}
|
|
|
|
static inline int tb_sw_write(struct tb_switch *sw, void *buffer,
|
|
enum tb_cfg_space space, u32 offset, u32 length)
|
|
{
|
|
return tb_cfg_write(sw->tb->ctl,
|
|
buffer,
|
|
tb_route(sw),
|
|
0,
|
|
space,
|
|
offset,
|
|
length);
|
|
}
|
|
|
|
static inline int tb_port_read(struct tb_port *port, void *buffer,
|
|
enum tb_cfg_space space, u32 offset, u32 length)
|
|
{
|
|
return tb_cfg_read(port->sw->tb->ctl,
|
|
buffer,
|
|
tb_route(port->sw),
|
|
port->port,
|
|
space,
|
|
offset,
|
|
length);
|
|
}
|
|
|
|
static inline int tb_port_write(struct tb_port *port, const void *buffer,
|
|
enum tb_cfg_space space, u32 offset, u32 length)
|
|
{
|
|
return tb_cfg_write(port->sw->tb->ctl,
|
|
buffer,
|
|
tb_route(port->sw),
|
|
port->port,
|
|
space,
|
|
offset,
|
|
length);
|
|
}
|
|
|
|
#define tb_err(tb, fmt, arg...) dev_err(&(tb)->nhi->pdev->dev, fmt, ## arg)
|
|
#define tb_WARN(tb, fmt, arg...) dev_WARN(&(tb)->nhi->pdev->dev, fmt, ## arg)
|
|
#define tb_warn(tb, fmt, arg...) dev_warn(&(tb)->nhi->pdev->dev, fmt, ## arg)
|
|
#define tb_info(tb, fmt, arg...) dev_info(&(tb)->nhi->pdev->dev, fmt, ## arg)
|
|
|
|
|
|
#define __TB_SW_PRINT(level, sw, fmt, arg...) \
|
|
do { \
|
|
struct tb_switch *__sw = (sw); \
|
|
level(__sw->tb, "%llx: " fmt, \
|
|
tb_route(__sw), ## arg); \
|
|
} while (0)
|
|
#define tb_sw_WARN(sw, fmt, arg...) __TB_SW_PRINT(tb_WARN, sw, fmt, ##arg)
|
|
#define tb_sw_warn(sw, fmt, arg...) __TB_SW_PRINT(tb_warn, sw, fmt, ##arg)
|
|
#define tb_sw_info(sw, fmt, arg...) __TB_SW_PRINT(tb_info, sw, fmt, ##arg)
|
|
|
|
|
|
#define __TB_PORT_PRINT(level, _port, fmt, arg...) \
|
|
do { \
|
|
struct tb_port *__port = (_port); \
|
|
level(__port->sw->tb, "%llx:%x: " fmt, \
|
|
tb_route(__port->sw), __port->port, ## arg); \
|
|
} while (0)
|
|
#define tb_port_WARN(port, fmt, arg...) \
|
|
__TB_PORT_PRINT(tb_WARN, port, fmt, ##arg)
|
|
#define tb_port_warn(port, fmt, arg...) \
|
|
__TB_PORT_PRINT(tb_warn, port, fmt, ##arg)
|
|
#define tb_port_info(port, fmt, arg...) \
|
|
__TB_PORT_PRINT(tb_info, port, fmt, ##arg)
|
|
|
|
struct tb *icm_probe(struct tb_nhi *nhi);
|
|
struct tb *tb_probe(struct tb_nhi *nhi);
|
|
|
|
extern struct bus_type tb_bus_type;
|
|
extern struct device_type tb_domain_type;
|
|
extern struct device_type tb_switch_type;
|
|
|
|
int tb_domain_init(void);
|
|
void tb_domain_exit(void);
|
|
void tb_switch_exit(void);
|
|
|
|
struct tb *tb_domain_alloc(struct tb_nhi *nhi, size_t privsize);
|
|
int tb_domain_add(struct tb *tb);
|
|
void tb_domain_remove(struct tb *tb);
|
|
int tb_domain_suspend_noirq(struct tb *tb);
|
|
int tb_domain_resume_noirq(struct tb *tb);
|
|
int tb_domain_suspend(struct tb *tb);
|
|
void tb_domain_complete(struct tb *tb);
|
|
int tb_domain_approve_switch(struct tb *tb, struct tb_switch *sw);
|
|
int tb_domain_approve_switch_key(struct tb *tb, struct tb_switch *sw);
|
|
int tb_domain_challenge_switch_key(struct tb *tb, struct tb_switch *sw);
|
|
int tb_domain_disconnect_pcie_paths(struct tb *tb);
|
|
|
|
static inline void tb_domain_put(struct tb *tb)
|
|
{
|
|
put_device(&tb->dev);
|
|
}
|
|
|
|
struct tb_switch *tb_switch_alloc(struct tb *tb, struct device *parent,
|
|
u64 route);
|
|
struct tb_switch *tb_switch_alloc_safe_mode(struct tb *tb,
|
|
struct device *parent, u64 route);
|
|
int tb_switch_configure(struct tb_switch *sw);
|
|
int tb_switch_add(struct tb_switch *sw);
|
|
void tb_switch_remove(struct tb_switch *sw);
|
|
void tb_switch_suspend(struct tb_switch *sw);
|
|
int tb_switch_resume(struct tb_switch *sw);
|
|
int tb_switch_reset(struct tb *tb, u64 route);
|
|
void tb_sw_set_unplugged(struct tb_switch *sw);
|
|
struct tb_switch *get_switch_at_route(struct tb_switch *sw, u64 route);
|
|
struct tb_switch *tb_switch_find_by_link_depth(struct tb *tb, u8 link,
|
|
u8 depth);
|
|
struct tb_switch *tb_switch_find_by_uuid(struct tb *tb, const uuid_be *uuid);
|
|
|
|
static inline unsigned int tb_switch_phy_port_from_link(unsigned int link)
|
|
{
|
|
return (link - 1) / TB_SWITCH_LINKS_PER_PHY_PORT;
|
|
}
|
|
|
|
static inline void tb_switch_put(struct tb_switch *sw)
|
|
{
|
|
put_device(&sw->dev);
|
|
}
|
|
|
|
static inline bool tb_is_switch(const struct device *dev)
|
|
{
|
|
return dev->type == &tb_switch_type;
|
|
}
|
|
|
|
static inline struct tb_switch *tb_to_switch(struct device *dev)
|
|
{
|
|
if (tb_is_switch(dev))
|
|
return container_of(dev, struct tb_switch, dev);
|
|
return NULL;
|
|
}
|
|
|
|
int tb_wait_for_port(struct tb_port *port, bool wait_if_unplugged);
|
|
int tb_port_add_nfc_credits(struct tb_port *port, int credits);
|
|
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);
|
|
|
|
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);
|
|
void tb_path_deactivate(struct tb_path *path);
|
|
bool tb_path_is_invalid(struct tb_path *path);
|
|
|
|
int tb_drom_read(struct tb_switch *sw);
|
|
int tb_drom_read_uid_only(struct tb_switch *sw, u64 *uid);
|
|
|
|
|
|
static inline int tb_route_length(u64 route)
|
|
{
|
|
return (fls64(route) + TB_ROUTE_SHIFT - 1) / TB_ROUTE_SHIFT;
|
|
}
|
|
|
|
static inline bool tb_is_upstream_port(struct tb_port *port)
|
|
{
|
|
return port == tb_upstream_port(port->sw);
|
|
}
|
|
|
|
/**
|
|
* tb_downstream_route() - get route to downstream switch
|
|
*
|
|
* Port must not be the upstream port (otherwise a loop is created).
|
|
*
|
|
* Return: Returns a route to the switch behind @port.
|
|
*/
|
|
static inline u64 tb_downstream_route(struct tb_port *port)
|
|
{
|
|
return tb_route(port->sw)
|
|
| ((u64) port->port << (port->sw->config.depth * 8));
|
|
}
|
|
|
|
#endif
|