/****************************************************************************** * * This file is provided under a dual BSD/GPLv2 license. When using or * redistributing this file, you may do so under either license. * * GPL LICENSE SUMMARY * * Copyright(c) 2007 - 2011 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 * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, * USA * * The full GNU General Public License is included in this distribution * in the file called LICENSE.GPL. * * Contact Information: * Intel Linux Wireless * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 * * BSD LICENSE * * Copyright(c) 2005 - 2011 Intel Corporation. All rights reserved. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * Neither the name Intel Corporation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * *****************************************************************************/ #ifndef __iwl_trans_h__ #define __iwl_trans_h__ #include #include #include "iwl-shared.h" #include "iwl-commands.h" /*This file includes the declaration that are exported from the transport * layer */ struct iwl_priv; struct iwl_shared; #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) enum { CMD_SYNC = 0, CMD_ASYNC = BIT(0), CMD_WANT_SKB = BIT(1), CMD_ON_DEMAND = BIT(2), }; #define DEF_CMD_PAYLOAD_SIZE 320 /** * struct iwl_device_cmd * * For allocation of the command and tx queues, this establishes the overall * size of the largest command we send to uCode, except for commands that * aren't fully copied and use other TFD space. */ struct iwl_device_cmd { struct iwl_cmd_header hdr; /* uCode API */ union { u32 flags; u8 val8; u16 val16; u32 val32; struct iwl_tx_cmd tx; struct iwl6000_channel_switch_cmd chswitch; u8 payload[DEF_CMD_PAYLOAD_SIZE]; } __packed cmd; } __packed; #define TFD_MAX_PAYLOAD_SIZE (sizeof(struct iwl_device_cmd)) #define IWL_MAX_CMD_TFDS 2 enum iwl_hcmd_dataflag { IWL_HCMD_DFL_NOCOPY = BIT(0), }; /** * 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 * @callback: * @flags: can be CMD_* note CMD_WANT_SKB is incompatible withe CMD_ASYNC * @len: array of the lenths of the chunks in data * @dataflags: * @id: id of the host command */ struct iwl_host_cmd { const void *data[IWL_MAX_CMD_TFDS]; unsigned long reply_page; void (*callback)(struct iwl_shared *shrd, struct iwl_device_cmd *cmd, struct iwl_rx_packet *pkt); u32 flags; u16 len[IWL_MAX_CMD_TFDS]; u8 dataflags[IWL_MAX_CMD_TFDS]; u8 id; }; /** * struct iwl_trans_ops - transport specific operations * @alloc: allocates the meta data (not the queues themselves) * @request_irq: requests IRQ - will be called before the FW load in probe flow * @start_device: allocates and inits all the resources for the transport * layer. * @prepare_card_hw: claim the ownership on the HW. Will be called during * probe. * @tx_start: starts and configures all the Tx fifo - usually done once the fw * is alive. * @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) * @send_cmd:send a host command * @tx: send an skb * @reclaim: free packet until ssn. Returns a list of freed packets. * @tx_agg_alloc: allocate resources for a TX BA session * @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. * @tx_agg_disable: de-configure a Tx queue to send AMPDUs * @kick_nic: remove the RESET from the embedded CPU and let it run * @free: release all the ressource for the transport layer itself such as * irq, tasklet etc... * @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 * @dbgfs_register: add the dbgfs files under this directory. Files will be * automatically deleted. * @suspend: stop the device unless WoWLAN is configured * @resume: resume activity of the device */ struct iwl_trans_ops { struct iwl_trans *(*alloc)(struct iwl_shared *shrd); int (*request_irq)(struct iwl_trans *iwl_trans); int (*start_device)(struct iwl_trans *trans); int (*prepare_card_hw)(struct iwl_trans *trans); void (*stop_device)(struct iwl_trans *trans); void (*tx_start)(struct iwl_trans *trans); void (*wake_any_queue)(struct iwl_trans *trans, enum iwl_rxon_context_id ctx); int (*send_cmd)(struct iwl_trans *trans, struct iwl_host_cmd *cmd); int (*tx)(struct iwl_trans *trans, struct sk_buff *skb, struct iwl_device_cmd *dev_cmd, enum iwl_rxon_context_id ctx, u8 sta_id); void (*reclaim)(struct iwl_trans *trans, int sta_id, int tid, int txq_id, int ssn, u32 status, struct sk_buff_head *skbs); int (*tx_agg_disable)(struct iwl_trans *trans, enum iwl_rxon_context_id ctx, int sta_id, int tid); int (*tx_agg_alloc)(struct iwl_trans *trans, enum iwl_rxon_context_id ctx, int sta_id, int tid, u16 *ssn); void (*tx_agg_setup)(struct iwl_trans *trans, enum iwl_rxon_context_id ctx, int sta_id, int tid, int frame_limit); void (*kick_nic)(struct iwl_trans *trans); void (*free)(struct iwl_trans *trans); void (*stop_queue)(struct iwl_trans *trans, int q); 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); int (*suspend)(struct iwl_trans *trans); int (*resume)(struct iwl_trans *trans); }; /** * struct iwl_trans - transport common data * @ops - pointer to iwl_trans_ops * @shrd - pointer to iwl_shared which holds shared data from the upper layer * @hcmd_lock: protects HCMD */ struct iwl_trans { const struct iwl_trans_ops *ops; struct iwl_shared *shrd; spinlock_t hcmd_lock; /* pointer to trans specific struct */ /*Ensure that this pointer will always be aligned to sizeof pointer */ char trans_specific[0] __attribute__((__aligned__(sizeof(void *)))); }; static inline int iwl_trans_request_irq(struct iwl_trans *trans) { return trans->ops->request_irq(trans); } static inline int iwl_trans_start_device(struct iwl_trans *trans) { return trans->ops->start_device(trans); } static inline int iwl_trans_prepare_card_hw(struct iwl_trans *trans) { return trans->ops->prepare_card_hw(trans); } static inline void iwl_trans_stop_device(struct iwl_trans *trans) { trans->ops->stop_device(trans); } static inline void iwl_trans_tx_start(struct iwl_trans *trans) { trans->ops->tx_start(trans); } static inline void iwl_trans_wake_any_queue(struct iwl_trans *trans, enum iwl_rxon_context_id ctx) { trans->ops->wake_any_queue(trans, ctx); } static inline int iwl_trans_send_cmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd) { 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) { return trans->ops->tx(trans, skb, dev_cmd, ctx, sta_id); } static inline void iwl_trans_reclaim(struct iwl_trans *trans, int sta_id, int tid, int txq_id, int ssn, u32 status, struct sk_buff_head *skbs) { trans->ops->reclaim(trans, sta_id, tid, txq_id, ssn, status, skbs); } static inline int iwl_trans_tx_agg_disable(struct iwl_trans *trans, enum iwl_rxon_context_id ctx, int sta_id, int tid) { return trans->ops->tx_agg_disable(trans, ctx, sta_id, tid); } static inline int iwl_trans_tx_agg_alloc(struct iwl_trans *trans, enum iwl_rxon_context_id ctx, int sta_id, int tid, u16 *ssn) { return trans->ops->tx_agg_alloc(trans, ctx, sta_id, tid, ssn); } static inline void iwl_trans_tx_agg_setup(struct iwl_trans *trans, enum iwl_rxon_context_id ctx, int sta_id, int tid, int frame_limit) { trans->ops->tx_agg_setup(trans, ctx, sta_id, tid, frame_limit); } static inline void iwl_trans_kick_nic(struct iwl_trans *trans) { trans->ops->kick_nic(trans); } 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) { trans->ops->stop_queue(trans, q); } static inline int iwl_trans_wait_tx_queue_empty(struct iwl_trans *trans) { return trans->ops->wait_tx_queue_empty(trans); } static inline int iwl_trans_check_stuck_queue(struct iwl_trans *trans, int q) { return trans->ops->check_stuck_queue(trans, q); } static inline int iwl_trans_dbgfs_register(struct iwl_trans *trans, struct dentry *dir) { return trans->ops->dbgfs_register(trans, dir); } static inline int iwl_trans_suspend(struct iwl_trans *trans) { return trans->ops->suspend(trans); } static inline int iwl_trans_resume(struct iwl_trans *trans) { return trans->ops->resume(trans); } /***************************************************** * Transport layers implementations ******************************************************/ extern const struct iwl_trans_ops trans_ops_pcie; #endif /* __iwl_trans_h__ */