diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-trans.h')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-trans.h | 201 |
1 files changed, 160 insertions, 41 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-trans.h b/drivers/net/wireless/iwlwifi/iwl-trans.h index dd57a36ecb1..34d49e171fb 100644 --- a/drivers/net/wireless/iwlwifi/iwl-trans.h +++ b/drivers/net/wireless/iwlwifi/iwl-trans.h @@ -5,7 +5,7 @@ * * GPL LICENSE SUMMARY * - * Copyright(c) 2007 - 2013 Intel Corporation. All rights reserved. + * Copyright(c) 2007 - 2014 Intel Corporation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of version 2 of the GNU General Public License as @@ -30,7 +30,7 @@ * * BSD LICENSE * - * Copyright(c) 2005 - 2013 Intel Corporation. All rights reserved. + * Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved. * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -70,6 +70,7 @@ #include "iwl-debug.h" #include "iwl-config.h" #include "iwl-fw.h" +#include "iwl-op-mode.h" /** * DOC: Transport layer - what is it ? @@ -100,8 +101,7 @@ * start_fw * * 5) Then when finished (or reset): - * stop_fw (a.k.a. stop device for the moment) - * stop_hw + * stop_device * * 6) Eventually, the free function will be called. */ @@ -176,19 +176,38 @@ struct iwl_rx_packet { u8 data[]; } __packed; +static inline u32 iwl_rx_packet_len(const struct iwl_rx_packet *pkt) +{ + return le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK; +} + +static inline u32 iwl_rx_packet_payload_len(const struct iwl_rx_packet *pkt) +{ + return iwl_rx_packet_len(pkt) - sizeof(pkt->hdr); +} + /** * enum CMD_MODE - how to send the host commands ? * - * @CMD_SYNC: The caller will be stalled until the fw responds to the command * @CMD_ASYNC: Return right away and don't wait for the response - * @CMD_WANT_SKB: valid only with CMD_SYNC. The caller needs the buffer of the - * response. The caller needs to call iwl_free_resp when done. + * @CMD_WANT_SKB: Not valid with CMD_ASYNC. The caller needs the buffer of + * the response. The caller needs to call iwl_free_resp when done. + * @CMD_HIGH_PRIO: The command is high priority - it goes to the front of the + * command queue, but after other high priority commands. valid only + * with CMD_ASYNC. + * @CMD_SEND_IN_IDLE: The command should be sent even when the trans is idle. + * @CMD_MAKE_TRANS_IDLE: The command response should mark the trans as idle. + * @CMD_WAKE_UP_TRANS: The command response should wake up the trans + * (i.e. mark it as non-idle). */ enum CMD_MODE { - CMD_SYNC = 0, CMD_ASYNC = BIT(0), CMD_WANT_SKB = BIT(1), CMD_SEND_IN_RFKILL = BIT(2), + CMD_HIGH_PRIO = BIT(3), + CMD_SEND_IN_IDLE = BIT(4), + CMD_MAKE_TRANS_IDLE = BIT(5), + CMD_WAKE_UP_TRANS = BIT(6), }; #define DEF_CMD_PAYLOAD_SIZE 320 @@ -318,6 +337,29 @@ enum iwl_d3_status { }; /** + * enum iwl_trans_status: transport status flags + * @STATUS_SYNC_HCMD_ACTIVE: a SYNC command is being processed + * @STATUS_DEVICE_ENABLED: APM is enabled + * @STATUS_TPOWER_PMI: the device might be asleep (need to wake it up) + * @STATUS_INT_ENABLED: interrupts are enabled + * @STATUS_RFKILL: the HW RFkill switch is in KILL position + * @STATUS_FW_ERROR: the fw is in error state + * @STATUS_TRANS_GOING_IDLE: shutting down the trans, only special commands + * are sent + * @STATUS_TRANS_IDLE: the trans is idle - general commands are not to be sent + */ +enum iwl_trans_status { + STATUS_SYNC_HCMD_ACTIVE, + STATUS_DEVICE_ENABLED, + STATUS_TPOWER_PMI, + STATUS_INT_ENABLED, + STATUS_RFKILL, + STATUS_FW_ERROR, + STATUS_TRANS_GOING_IDLE, + STATUS_TRANS_IDLE, +}; + +/** * struct iwl_trans_config - transport configuration * * @op_mode: pointer to the upper layer. @@ -344,12 +386,12 @@ struct iwl_trans_config { u8 cmd_queue; u8 cmd_fifo; const u8 *no_reclaim_cmds; - int n_no_reclaim_cmds; + unsigned int n_no_reclaim_cmds; bool rx_buf_size_8k; bool bc_table_dword; unsigned int queue_watchdog_timeout; - const char **command_names; + const char *const *command_names; }; struct iwl_trans; @@ -361,9 +403,7 @@ struct iwl_trans; * * @start_hw: starts the HW- from that point on, the HW can send interrupts * May sleep - * @stop_hw: stops the HW- from that point on, the HW will be in low power but - * will still issue interrupt if the HW RF kill is triggered unless - * op_mode_leaving is true. + * @op_mode_leave: Turn off the HW RF kill indication if on * May sleep * @start_fw: allocates and inits all the resources for the transport * layer. Also kick a fw image. @@ -371,8 +411,11 @@ struct iwl_trans; * @fw_alive: called when the fw sends alive notification. If the fw provides * the SCD base address in SRAM, then provide it here, or 0 otherwise. * May sleep - * @stop_device:stops the whole device (embedded CPU put to reset) - * May sleep + * @stop_device: stops the whole device (embedded CPU put to reset) and stops + * the HW. From that point on, the HW will be in low power but will still + * issue interrupt if the HW RF kill is triggered. This callback must do + * the right thing and not crash even if start_hw() was called but not + * start_fw(). May sleep * @d3_suspend: put the device into the correct mode for WoWLAN during * suspend. This is optional, if not implemented WoWLAN will not be * supported. This callback may sleep. @@ -382,7 +425,7 @@ struct iwl_trans; * @send_cmd:send a host command. Must return -ERFKILL if RFkill is asserted. * If RFkill is asserted in the middle of a SYNC host command, it must * return -ERFKILL straight away. - * May sleep only if CMD_SYNC is set + * May sleep only if CMD_ASYNC is not set * @tx: send an skb * Must be atomic * @reclaim: free packet until ssn. Returns a list of freed packets. @@ -392,8 +435,7 @@ struct iwl_trans; * this one. The op_mode must not configure the HCMD queue. May sleep. * @txq_disable: de-configure a Tx queue to send AMPDUs * Must be atomic - * @wait_tx_queue_empty: wait until all tx queues are empty - * May sleep + * @wait_tx_queue_empty: wait until tx queues are empty. May sleep. * @dbgfs_register: add the dbgfs files under this directory. Files will be * automatically deleted. * @write8: write a u8 to a register at offset ofs from the BAR @@ -414,13 +456,25 @@ struct iwl_trans; * @release_nic_access: let the NIC go to sleep. The "flags" parameter * must be the same one that was sent before to the grab_nic_access. * @set_bits_mask - set SRAM register according to value and mask. + * @ref: grab a reference to the transport/FW layers, disallowing + * certain low power states + * @unref: release a reference previously taken with @ref. Note that + * initially the reference count is 1, making an initial @unref + * necessary to allow low power states. + * @dump_data: fill a data dump with debug data, maybe containing last + * TX'ed commands and similar. When called with a NULL buffer and + * zero buffer length, provide only the (estimated) required buffer + * length. Return the used buffer length. + * Note that the transport must fill in the proper file headers. */ struct iwl_trans_ops { int (*start_hw)(struct iwl_trans *iwl_trans); - void (*stop_hw)(struct iwl_trans *iwl_trans, bool op_mode_leaving); + void (*op_mode_leave)(struct iwl_trans *iwl_trans); int (*start_fw)(struct iwl_trans *trans, const struct fw_img *fw, bool run_in_rfkill); + int (*update_sf)(struct iwl_trans *trans, + struct iwl_sf_region *st_fwrd_space); void (*fw_alive)(struct iwl_trans *trans, u32 scd_addr); void (*stop_device)(struct iwl_trans *trans); @@ -440,7 +494,7 @@ struct iwl_trans_ops { void (*txq_disable)(struct iwl_trans *trans, int queue); int (*dbgfs_register)(struct iwl_trans *trans, struct dentry* dir); - int (*wait_tx_queue_empty)(struct iwl_trans *trans); + int (*wait_tx_queue_empty)(struct iwl_trans *trans, u32 txq_bm); void (*write8)(struct iwl_trans *trans, u32 ofs, u8 val); void (*write32)(struct iwl_trans *trans, u32 ofs, u32 val); @@ -460,6 +514,12 @@ struct iwl_trans_ops { unsigned long *flags); void (*set_bits_mask)(struct iwl_trans *trans, u32 reg, u32 mask, u32 value); + void (*ref)(struct iwl_trans *trans); + void (*unref)(struct iwl_trans *trans); + +#ifdef CONFIG_IWLWIFI_DEBUGFS + u32 (*dump_data)(struct iwl_trans *trans, void *buf, u32 buflen); +#endif }; /** @@ -479,6 +539,7 @@ enum iwl_trans_state { * @ops - pointer to iwl_trans_ops * @op_mode - pointer to the op_mode * @cfg - pointer to the configuration + * @status: a bit-mask of transport status flags * @dev - pointer to struct device * that represents the device * @hw_id: a u32 with the ID of the device / subdevice. * Set during transport allocation. @@ -493,12 +554,14 @@ enum iwl_trans_state { * starting the firmware, used for tracing * @rx_mpdu_cmd_hdr_size: used for tracing, amount of data before the * start of the 802.11 header in the @rx_mpdu_cmd + * @dflt_pwr_limit: default power limit fetched from the platform (ACPI) */ struct iwl_trans { const struct iwl_trans_ops *ops; struct iwl_op_mode *op_mode; const struct iwl_cfg *cfg; enum iwl_trans_state state; + unsigned long status; struct device *dev; u32 hw_rev; @@ -520,6 +583,8 @@ struct iwl_trans { struct lockdep_map sync_cmd_lockdep_map; #endif + u64 dflt_pwr_limit; + /* pointer to trans specific struct */ /*Ensure that this pointer will always be aligned to sizeof pointer */ char trans_specific[0] __aligned(sizeof(void *)); @@ -540,15 +605,14 @@ static inline int iwl_trans_start_hw(struct iwl_trans *trans) return trans->ops->start_hw(trans); } -static inline void iwl_trans_stop_hw(struct iwl_trans *trans, - bool op_mode_leaving) +static inline void iwl_trans_op_mode_leave(struct iwl_trans *trans) { might_sleep(); - trans->ops->stop_hw(trans, op_mode_leaving); + if (trans->ops->op_mode_leave) + trans->ops->op_mode_leave(trans); - if (op_mode_leaving) - trans->op_mode = NULL; + trans->op_mode = NULL; trans->state = IWL_TRANS_NO_FW; } @@ -570,9 +634,21 @@ static inline int iwl_trans_start_fw(struct iwl_trans *trans, WARN_ON_ONCE(!trans->rx_mpdu_cmd); + clear_bit(STATUS_FW_ERROR, &trans->status); return trans->ops->start_fw(trans, fw, run_in_rfkill); } +static inline int iwl_trans_update_sf(struct iwl_trans *trans, + struct iwl_sf_region *st_fwrd_space) +{ + might_sleep(); + + if (trans->ops->update_sf) + return trans->ops->update_sf(trans, st_fwrd_space); + + return 0; +} + static inline void iwl_trans_stop_device(struct iwl_trans *trans) { might_sleep(); @@ -596,13 +672,44 @@ static inline int iwl_trans_d3_resume(struct iwl_trans *trans, return trans->ops->d3_resume(trans, status, test); } +static inline void iwl_trans_ref(struct iwl_trans *trans) +{ + if (trans->ops->ref) + trans->ops->ref(trans); +} + +static inline void iwl_trans_unref(struct iwl_trans *trans) +{ + if (trans->ops->unref) + trans->ops->unref(trans); +} + +#ifdef CONFIG_IWLWIFI_DEBUGFS +static inline u32 iwl_trans_dump_data(struct iwl_trans *trans, + void *buf, u32 buflen) +{ + if (!trans->ops->dump_data) + return 0; + return trans->ops->dump_data(trans, buf, buflen); +} +#endif + static inline int iwl_trans_send_cmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd) { int ret; - WARN_ONCE(trans->state != IWL_TRANS_FW_ALIVE, - "%s bad state = %d", __func__, trans->state); + if (unlikely(!(cmd->flags & CMD_SEND_IN_RFKILL) && + test_bit(STATUS_RFKILL, &trans->status))) + return -ERFKILL; + + if (unlikely(test_bit(STATUS_FW_ERROR, &trans->status))) + return -EIO; + + if (unlikely(trans->state != IWL_TRANS_FW_ALIVE)) { + IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state); + return -EIO; + } if (!(cmd->flags & CMD_ASYNC)) lock_map_acquire_read(&trans->sync_cmd_lockdep_map); @@ -638,8 +745,11 @@ static inline void iwl_trans_free_tx_cmd(struct iwl_trans *trans, static inline int iwl_trans_tx(struct iwl_trans *trans, struct sk_buff *skb, struct iwl_device_cmd *dev_cmd, int queue) { - WARN_ONCE(trans->state != IWL_TRANS_FW_ALIVE, - "%s bad state = %d", __func__, trans->state); + if (unlikely(test_bit(STATUS_FW_ERROR, &trans->status))) + return -EIO; + + if (unlikely(trans->state != IWL_TRANS_FW_ALIVE)) + IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state); return trans->ops->tx(trans, skb, dev_cmd, queue); } @@ -647,17 +757,14 @@ static inline int iwl_trans_tx(struct iwl_trans *trans, struct sk_buff *skb, static inline void iwl_trans_reclaim(struct iwl_trans *trans, int queue, int ssn, struct sk_buff_head *skbs) { - WARN_ONCE(trans->state != IWL_TRANS_FW_ALIVE, - "%s bad state = %d", __func__, trans->state); + if (unlikely(trans->state != IWL_TRANS_FW_ALIVE)) + IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state); trans->ops->reclaim(trans, queue, ssn, skbs); } static inline void iwl_trans_txq_disable(struct iwl_trans *trans, int queue) { - WARN_ONCE(trans->state != IWL_TRANS_FW_ALIVE, - "%s bad state = %d", __func__, trans->state); - trans->ops->txq_disable(trans, queue); } @@ -667,8 +774,8 @@ static inline void iwl_trans_txq_enable(struct iwl_trans *trans, int queue, { might_sleep(); - WARN_ONCE(trans->state != IWL_TRANS_FW_ALIVE, - "%s bad state = %d", __func__, trans->state); + if (unlikely((trans->state != IWL_TRANS_FW_ALIVE))) + IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state); trans->ops->txq_enable(trans, queue, fifo, sta_id, tid, frame_limit, ssn); @@ -681,12 +788,13 @@ static inline void iwl_trans_ac_txq_enable(struct iwl_trans *trans, int queue, IWL_MAX_TID_COUNT, IWL_FRAME_LIMIT, 0); } -static inline int iwl_trans_wait_tx_queue_empty(struct iwl_trans *trans) +static inline int iwl_trans_wait_tx_queue_empty(struct iwl_trans *trans, + u32 txq_bm) { - WARN_ONCE(trans->state != IWL_TRANS_FW_ALIVE, - "%s bad state = %d", __func__, trans->state); + if (unlikely(trans->state != IWL_TRANS_FW_ALIVE)) + IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state); - return trans->ops->wait_tx_queue_empty(trans); + return trans->ops->wait_tx_queue_empty(trans, txq_bm); } static inline int iwl_trans_dbgfs_register(struct iwl_trans *trans, @@ -758,7 +866,8 @@ static inline u32 iwl_trans_write_mem32(struct iwl_trans *trans, u32 addr, static inline void iwl_trans_set_pmi(struct iwl_trans *trans, bool state) { - trans->ops->set_pmi(trans, state); + if (trans->ops->set_pmi) + trans->ops->set_pmi(trans, state); } static inline void @@ -778,6 +887,16 @@ iwl_trans_release_nic_access(struct iwl_trans *trans, unsigned long *flags) __release(nic_access); } +static inline void iwl_trans_fw_error(struct iwl_trans *trans) +{ + if (WARN_ON_ONCE(!trans->op_mode)) + return; + + /* prevent double restarts due to the same erroneous FW */ + if (!test_and_set_bit(STATUS_FW_ERROR, &trans->status)) + iwl_op_mode_nic_error(trans->op_mode); +} + /***************************************************** * driver (transport) register/unregister functions ******************************************************/ |