diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-trans.h')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-trans.h | 191 |
1 files changed, 121 insertions, 70 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-trans.h b/drivers/net/wireless/iwlwifi/iwl-trans.h index 4e7e6c0eede9..7d1990c7f658 100644 --- a/drivers/net/wireless/iwlwifi/iwl-trans.h +++ b/drivers/net/wireless/iwlwifi/iwl-trans.h @@ -64,6 +64,7 @@ #define __iwl_trans_h__ #include <linux/ieee80211.h> +#include <linux/mm.h> /* for page_address */ #include "iwl-shared.h" #include "iwl-debug.h" @@ -121,6 +122,62 @@ struct dentry; #define SEQ_TO_SN(seq) (((seq) & IEEE80211_SCTL_SEQ) >> 4) #define SN_TO_SEQ(ssn) (((ssn) << 4) & IEEE80211_SCTL_SEQ) #define MAX_SN ((IEEE80211_SCTL_SEQ) >> 4) +#define SEQ_TO_QUEUE(s) (((s) >> 8) & 0x1f) +#define QUEUE_TO_SEQ(q) (((q) & 0x1f) << 8) +#define SEQ_TO_INDEX(s) ((s) & 0xff) +#define INDEX_TO_SEQ(i) ((i) & 0xff) +#define SEQ_RX_FRAME cpu_to_le16(0x8000) + +/** + * struct iwl_cmd_header + * + * This header format appears in the beginning of each command sent from the + * driver, and each response/notification received from uCode. + */ +struct iwl_cmd_header { + u8 cmd; /* Command ID: REPLY_RXON, etc. */ + u8 flags; /* 0:5 reserved, 6 abort, 7 internal */ + /* + * The driver sets up the sequence number to values of its choosing. + * uCode does not use this value, but passes it back to the driver + * when sending the response to each driver-originated command, so + * the driver can match the response to the command. Since the values + * don't get used by uCode, the driver may set up an arbitrary format. + * + * There is one exception: uCode sets bit 15 when it originates + * the response/notification, i.e. when the response/notification + * is not a direct response to a command sent by the driver. For + * example, uCode issues REPLY_RX when it sends a received frame + * to the driver; it is not a direct response to any driver command. + * + * The Linux driver uses the following format: + * + * 0:7 tfd index - position within TX queue + * 8:12 TX queue id + * 13:14 reserved + * 15 unsolicited RX or uCode-originated notification + */ + __le16 sequence; +} __packed; + + +#define FH_RSCSR_FRAME_SIZE_MSK 0x00003FFF /* bits 0-13 */ + +struct iwl_rx_packet { + /* + * The first 4 bytes of the RX frame header contain both the RX frame + * size and some flags. + * Bit fields: + * 31: flag flush RB request + * 30: flag ignore TC (terminal counter) request + * 29: flag fast IRQ request + * 28-14: Reserved + * 13-00: RX frame size + */ + __le32 len_n_flags; + struct iwl_cmd_header hdr; + u8 data[]; +} __packed; /** * enum CMD_MODE - how to send the host commands ? @@ -173,7 +230,9 @@ enum iwl_hcmd_dataflag { * struct iwl_host_cmd - Host command to the uCode * * @data: array of chunks that composes the data of the host command - * @reply_page: pointer to the page that holds the response to the host command + * @resp_pkt: response packet, if %CMD_WANT_SKB was set + * @_rx_page_order: (internally used to free response packet) + * @_rx_page_addr: (internally used to free response packet) * @handler_status: return value of the handler of the command * (put in setup_rx_handlers) - valid for SYNC mode only * @flags: can be CMD_* @@ -183,7 +242,9 @@ enum iwl_hcmd_dataflag { */ struct iwl_host_cmd { const void *data[IWL_MAX_CMD_TFDS]; - unsigned long reply_page; + struct iwl_rx_packet *resp_pkt; + unsigned long _rx_page_addr; + u32 _rx_page_order; int handler_status; u32 flags; @@ -192,6 +253,40 @@ struct iwl_host_cmd { u8 id; }; +static inline void iwl_free_resp(struct iwl_host_cmd *cmd) +{ + free_pages(cmd->_rx_page_addr, cmd->_rx_page_order); +} + +struct iwl_rx_cmd_buffer { + struct page *_page; +}; + +static inline void *rxb_addr(struct iwl_rx_cmd_buffer *r) +{ + return page_address(r->_page); +} + +static inline struct page *rxb_steal_page(struct iwl_rx_cmd_buffer *r) +{ + struct page *p = r->_page; + r->_page = NULL; + return p; +} + +/** + * struct iwl_trans_config - transport configuration + * + * @op_mode: pointer to the upper layer. + * Must be set before any other call. + * @cmd_queue: the index of the command queue. + * Must be set before start_fw. + */ +struct iwl_trans_config { + struct iwl_op_mode *op_mode; + u8 cmd_queue; +}; + /** * struct iwl_trans_ops - transport specific operations * @@ -207,9 +302,11 @@ struct iwl_host_cmd { * May sleep * @fw_alive: called when the fw sends alive notification * May sleep - * @wake_any_queue: wake all the queues of a specfic context IWL_RXON_CTX_* * @stop_device:stops the whole device (embedded CPU put to reset) * May sleep + * @wowlan_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. * @send_cmd:send a host command * May sleep only if CMD_SYNC is set * @tx: send an skb @@ -217,17 +314,16 @@ struct iwl_host_cmd { * @reclaim: free packet until ssn. Returns a list of freed packets. * Must be atomic * @tx_agg_alloc: allocate resources for a TX BA session - * May sleep + * Must be atomic * @tx_agg_setup: setup a tx queue for AMPDU - will be called once the HW is * ready and a successful ADDBA response has been received. * May sleep * @tx_agg_disable: de-configure a Tx queue to send AMPDUs - * May sleep + * Must be atomic * @free: release all the ressource for the transport layer itself such as * irq, tasklet etc... From this point on, the device may not issue * any interrupt (incl. RFKILL). * May sleep - * @stop_queue: stop a specific queue * @check_stuck_queue: check if a specific queue is stuck * @wait_tx_queue_empty: wait until all tx queues are empty * May sleep @@ -238,18 +334,19 @@ struct iwl_host_cmd { * @write8: write a u8 to a register at offset ofs from the BAR * @write32: write a u32 to a register at offset ofs from the BAR * @read32: read a u32 register at offset ofs from the BAR + * @configure: configure parameters required by the transport layer from + * the op_mode. May be called several times before start_fw, can't be + * called after that. */ struct iwl_trans_ops { int (*start_hw)(struct iwl_trans *iwl_trans); void (*stop_hw)(struct iwl_trans *iwl_trans); - int (*start_fw)(struct iwl_trans *trans, struct fw_img *fw); + int (*start_fw)(struct iwl_trans *trans, const struct fw_img *fw); void (*fw_alive)(struct iwl_trans *trans); void (*stop_device)(struct iwl_trans *trans); - void (*wake_any_queue)(struct iwl_trans *trans, - enum iwl_rxon_context_id ctx, - const char *msg); + void (*wowlan_suspend)(struct iwl_trans *trans); int (*send_cmd)(struct iwl_trans *trans, struct iwl_host_cmd *cmd); @@ -257,8 +354,7 @@ struct iwl_trans_ops { struct iwl_device_cmd *dev_cmd, enum iwl_rxon_context_id ctx, u8 sta_id, u8 tid); int (*reclaim)(struct iwl_trans *trans, int sta_id, int tid, - int txq_id, int ssn, u32 status, - struct sk_buff_head *skbs); + int txq_id, int ssn, struct sk_buff_head *skbs); int (*tx_agg_disable)(struct iwl_trans *trans, int sta_id, int tid); @@ -270,8 +366,6 @@ struct iwl_trans_ops { void (*free)(struct iwl_trans *trans); - void (*stop_queue)(struct iwl_trans *trans, int q, const char *msg); - int (*dbgfs_register)(struct iwl_trans *trans, struct dentry* dir); int (*check_stuck_queue)(struct iwl_trans *trans, int q); int (*wait_tx_queue_empty)(struct iwl_trans *trans); @@ -282,14 +376,8 @@ struct iwl_trans_ops { void (*write8)(struct iwl_trans *trans, u32 ofs, u8 val); void (*write32)(struct iwl_trans *trans, u32 ofs, u32 val); u32 (*read32)(struct iwl_trans *trans, u32 ofs); -}; - -/* Opaque calibration results */ -struct iwl_calib_result { - struct list_head list; - size_t cmd_len; - struct iwl_calib_hdr hdr; - /* data follows */ + void (*configure)(struct iwl_trans *trans, + const struct iwl_trans_config *trans_cfg); }; /** @@ -309,52 +397,44 @@ enum iwl_trans_state { * @ops - pointer to iwl_trans_ops * @op_mode - pointer to the op_mode * @shrd - pointer to iwl_shared which holds shared data from the upper layer - * @hcmd_lock: protects HCMD * @reg_lock - protect hw register access * @dev - pointer to struct device * that represents the device - * @irq - the irq number for the device * @hw_id: a u32 with the ID of the device / subdevice. * Set during transport allocation. * @hw_id_str: a string with info about HW ID. Set during transport allocation. - * @ucode_write_complete: indicates that the ucode has been copied. * @nvm_device_type: indicates OTP or eeprom * @pm_support: set to true in start_hw if link pm is supported - * @calib_results: list head for init calibration results */ struct iwl_trans { const struct iwl_trans_ops *ops; struct iwl_op_mode *op_mode; struct iwl_shared *shrd; enum iwl_trans_state state; - spinlock_t hcmd_lock; spinlock_t reg_lock; struct device *dev; - unsigned int irq; u32 hw_rev; u32 hw_id; char hw_id_str[52]; - u8 ucode_write_complete; - int nvm_device_type; bool pm_support; - struct list_head calib_results; - /* pointer to trans specific struct */ /*Ensure that this pointer will always be aligned to sizeof pointer */ char trans_specific[0] __aligned(sizeof(void *)); }; static inline void iwl_trans_configure(struct iwl_trans *trans, - struct iwl_op_mode *op_mode) + const struct iwl_trans_config *trans_cfg) { /* * only set the op_mode for the moment. Later on, this function will do * more */ - trans->op_mode = op_mode; + trans->op_mode = trans_cfg->op_mode; + + trans->ops->configure(trans, trans_cfg); } static inline int iwl_trans_start_hw(struct iwl_trans *trans) @@ -382,7 +462,8 @@ static inline void iwl_trans_fw_alive(struct iwl_trans *trans) trans->state = IWL_TRANS_FW_ALIVE; } -static inline int iwl_trans_start_fw(struct iwl_trans *trans, struct fw_img *fw) +static inline int iwl_trans_start_fw(struct iwl_trans *trans, + const struct fw_img *fw) { might_sleep(); @@ -398,17 +479,12 @@ static inline void iwl_trans_stop_device(struct iwl_trans *trans) trans->state = IWL_TRANS_NO_FW; } -static inline void iwl_trans_wake_any_queue(struct iwl_trans *trans, - enum iwl_rxon_context_id ctx, - const char *msg) +static inline void iwl_trans_wowlan_suspend(struct iwl_trans *trans) { - if (trans->state != IWL_TRANS_FW_ALIVE) - IWL_ERR(trans, "%s bad state = %d", __func__, trans->state); - - trans->ops->wake_any_queue(trans, ctx, msg); + might_sleep(); + trans->ops->wowlan_suspend(trans); } - static inline int iwl_trans_send_cmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd) { @@ -418,9 +494,6 @@ static inline int iwl_trans_send_cmd(struct iwl_trans *trans, return trans->ops->send_cmd(trans, cmd); } -int iwl_trans_send_cmd_pdu(struct iwl_trans *trans, u8 id, - u32 flags, u16 len, const void *data); - static inline int iwl_trans_tx(struct iwl_trans *trans, struct sk_buff *skb, struct iwl_device_cmd *dev_cmd, enum iwl_rxon_context_id ctx, u8 sta_id, u8 tid) @@ -432,21 +505,18 @@ static inline int iwl_trans_tx(struct iwl_trans *trans, struct sk_buff *skb, } static inline int iwl_trans_reclaim(struct iwl_trans *trans, int sta_id, - int tid, int txq_id, int ssn, u32 status, + int tid, int txq_id, int ssn, struct sk_buff_head *skbs) { if (trans->state != IWL_TRANS_FW_ALIVE) IWL_ERR(trans, "%s bad state = %d", __func__, trans->state); - return trans->ops->reclaim(trans, sta_id, tid, txq_id, ssn, - status, skbs); + return trans->ops->reclaim(trans, sta_id, tid, txq_id, ssn, skbs); } static inline int iwl_trans_tx_agg_disable(struct iwl_trans *trans, int sta_id, int tid) { - might_sleep(); - if (trans->state != IWL_TRANS_FW_ALIVE) IWL_ERR(trans, "%s bad state = %d", __func__, trans->state); @@ -456,8 +526,6 @@ static inline int iwl_trans_tx_agg_disable(struct iwl_trans *trans, static inline int iwl_trans_tx_agg_alloc(struct iwl_trans *trans, int sta_id, int tid) { - might_sleep(); - if (trans->state != IWL_TRANS_FW_ALIVE) IWL_ERR(trans, "%s bad state = %d", __func__, trans->state); @@ -483,15 +551,6 @@ static inline void iwl_trans_free(struct iwl_trans *trans) trans->ops->free(trans); } -static inline void iwl_trans_stop_queue(struct iwl_trans *trans, int q, - const char *msg) -{ - if (trans->state != IWL_TRANS_FW_ALIVE) - IWL_ERR(trans, "%s bad state = %d", __func__, trans->state); - - trans->ops->stop_queue(trans, q, msg); -} - static inline int iwl_trans_wait_tx_queue_empty(struct iwl_trans *trans) { if (trans->state != IWL_TRANS_FW_ALIVE) @@ -541,14 +600,6 @@ static inline u32 iwl_trans_read32(struct iwl_trans *trans, u32 ofs) } /***************************************************** -* Utils functions -******************************************************/ -int iwl_send_calib_results(struct iwl_trans *trans); -int iwl_calib_set(struct iwl_trans *trans, - const struct iwl_calib_hdr *cmd, int len); -void iwl_calib_free_results(struct iwl_trans *trans); - -/***************************************************** * Transport layers implementations + their allocation function ******************************************************/ struct pci_dev; |
