diff options
Diffstat (limited to 'drivers/thunderbolt/ctl.c')
| -rw-r--r-- | drivers/thunderbolt/ctl.c | 51 |
1 files changed, 44 insertions, 7 deletions
diff --git a/drivers/thunderbolt/ctl.c b/drivers/thunderbolt/ctl.c index bac08b820015..f1aeaff9f368 100644 --- a/drivers/thunderbolt/ctl.c +++ b/drivers/thunderbolt/ctl.c @@ -20,7 +20,17 @@ #define TB_CTL_RETRIES 4 /** - * struct tb_cfg - thunderbolt control channel + * struct tb_ctl - Thunderbolt control channel + * @nhi: Pointer to the NHI structure + * @tx: Transmit ring + * @rx: Receive ring + * @frame_pool: DMA pool for control messages + * @rx_packets: Received control messages + * @request_queue_lock: Lock protecting @request_queue + * @request_queue: List of outstanding requests + * @running: Is the control channel running at the moment + * @callback: Callback called when hotplug message is received + * @callback_data: Data passed to @callback */ struct tb_ctl { struct tb_nhi *nhi; @@ -338,7 +348,7 @@ static void tb_ctl_tx_callback(struct tb_ring *ring, struct ring_frame *frame, tb_ctl_pkg_free(pkg); } -/** +/* * tb_cfg_tx() - transmit a packet on the control channel * * len must be a multiple of four. @@ -375,7 +385,7 @@ static int tb_ctl_tx(struct tb_ctl *ctl, const void *data, size_t len, return res; } -/** +/* * tb_ctl_handle_event() - acknowledge a plug event, invoke ctl->callback */ static bool tb_ctl_handle_event(struct tb_ctl *ctl, enum tb_cfg_pkg_type type, @@ -602,6 +612,9 @@ struct tb_cfg_result tb_cfg_request_sync(struct tb_ctl *ctl, /** * tb_ctl_alloc() - allocate a control channel + * @nhi: Pointer to NHI + * @cb: Callback called for plug events + * @cb_data: Data passed to @cb * * cb will be invoked once for every hot plug event. * @@ -649,6 +662,7 @@ err: /** * tb_ctl_free() - free a control channel + * @ctl: Control channel to free * * Must be called after tb_ctl_stop. * @@ -677,6 +691,7 @@ void tb_ctl_free(struct tb_ctl *ctl) /** * tb_cfg_start() - start/resume the control channel + * @ctl: Control channel to start */ void tb_ctl_start(struct tb_ctl *ctl) { @@ -691,7 +706,8 @@ void tb_ctl_start(struct tb_ctl *ctl) } /** - * control() - pause the control channel + * tb_ctrl_stop() - pause the control channel + * @ctl: Control channel to stop * * All invocations of ctl->callback will have finished after this method * returns. @@ -784,6 +800,9 @@ static bool tb_cfg_copy(struct tb_cfg_request *req, const struct ctl_pkg *pkg) /** * tb_cfg_reset() - send a reset packet and wait for a response + * @ctl: Control channel pointer + * @route: Router string for the router to send reset + * @timeout_msec: Timeout in ms how long to wait for the response * * If the switch at route is incorrectly configured then we will not receive a * reply (even though the switch will reset). The caller should check for @@ -820,9 +839,17 @@ struct tb_cfg_result tb_cfg_reset(struct tb_ctl *ctl, u64 route, } /** - * tb_cfg_read() - read from config space into buffer + * tb_cfg_read_raw() - read from config space into buffer + * @ctl: Pointer to the control channel + * @buffer: Buffer where the data is read + * @route: Route string of the router + * @port: Port number when reading from %TB_CFG_PORT, %0 otherwise + * @space: Config space selector + * @offset: Dword word offset of the register to start reading + * @length: Number of dwords to read + * @timeout_msec: Timeout in ms how long to wait for the response * - * Offset and length are in dwords. + * Reads from router config space without translating the possible error. */ struct tb_cfg_result tb_cfg_read_raw(struct tb_ctl *ctl, void *buffer, u64 route, u32 port, enum tb_cfg_space space, @@ -884,8 +911,16 @@ struct tb_cfg_result tb_cfg_read_raw(struct tb_ctl *ctl, void *buffer, /** * tb_cfg_write() - write from buffer into config space + * @ctl: Pointer to the control channel + * @buffer: Data to write + * @route: Route string of the router + * @port: Port number when writing to %TB_CFG_PORT, %0 otherwise + * @space: Config space selector + * @offset: Dword word offset of the register to start writing + * @length: Number of dwords to write + * @timeout_msec: Timeout in ms how long to wait for the response * - * Offset and length are in dwords. + * Writes to router config space without translating the possible error. */ struct tb_cfg_result tb_cfg_write_raw(struct tb_ctl *ctl, const void *buffer, u64 route, u32 port, enum tb_cfg_space space, @@ -1022,6 +1057,8 @@ int tb_cfg_write(struct tb_ctl *ctl, const void *buffer, u64 route, u32 port, /** * tb_cfg_get_upstream_port() - get upstream port number of switch at route + * @ctl: Pointer to the control channel + * @route: Route string of the router * * Reads the first dword from the switches TB_CFG_SWITCH config area and * returns the port number from which the reply originated. |