drivers/net/wireless/iwlwifi/iwl-trans.h

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   4  * redistributing this file, you may do so under either license.
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   8  * Copyright(c) 2007 - 2011 Intel Corporation. All rights reserved.
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  17  * General Public License for more details.
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  23  *
  24  * The full GNU General Public License is included in this distribution
  25  * in the file called LICENSE.GPL.
  26  *
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  28  *  Intel Linux Wireless <ilw@linux.intel.com>
  29  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  30  *
  31  * BSD LICENSE
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  33  * Copyright(c) 2005 - 2011 Intel Corporation. All rights reserved.
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  48  *    from this software without specific prior written permission.
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  50  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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  62  *****************************************************************************/
  63 #ifndef __iwl_trans_h__
  64 #define __iwl_trans_h__
  65
  66 #include <linux/debugfs.h>
  67 #include <linux/skbuff.h>
  68
  69 #include "iwl-shared.h"
  70 #include "iwl-commands.h"
  71
  72  /*This file includes the declaration that are exported from the transport
  73  * layer */
  74
  75 struct iwl_priv;
  76 struct iwl_shared;
  77
  78 #define SEQ_TO_SN(seq) (((seq) & IEEE80211_SCTL_SEQ) >> 4)
  79 #define SN_TO_SEQ(ssn) (((ssn) << 4) & IEEE80211_SCTL_SEQ)
  80 #define MAX_SN ((IEEE80211_SCTL_SEQ) >> 4)
  81
  82 enum {
  83         CMD_SYNC = 0,
  84         CMD_ASYNC = BIT(0),
  85         CMD_WANT_SKB = BIT(1),
  86         CMD_ON_DEMAND = BIT(2),
  87 };
  88
  89 #define DEF_CMD_PAYLOAD_SIZE 320
  90
  91 /**
  92  * struct iwl_device_cmd
  93  *
  94  * For allocation of the command and tx queues, this establishes the overall
  95  * size of the largest command we send to uCode, except for commands that
  96  * aren't fully copied and use other TFD space.
  97  */
  98 struct iwl_device_cmd {
  99         struct iwl_cmd_header hdr;      /* uCode API */
 100         u8 payload[DEF_CMD_PAYLOAD_SIZE];
 101 } __packed;
 102
 103 #define TFD_MAX_PAYLOAD_SIZE (sizeof(struct iwl_device_cmd))
 104
 105 #define IWL_MAX_CMD_TFDS        2
 106
 107 enum iwl_hcmd_dataflag {
 108         IWL_HCMD_DFL_NOCOPY     = BIT(0),
 109 };
 110
 111 /**
 112  * struct iwl_host_cmd - Host command to the uCode
 113  * @data: array of chunks that composes the data of the host command
 114  * @reply_page: pointer to the page that holds the response to the host command
 115  * @handler_status: return value of the handler of the command
 116  *      (put in setup_rx_handlers) - valid for SYNC mode only
 117  * @callback:
 118  * @flags: can be CMD_* note CMD_WANT_SKB is incompatible withe CMD_ASYNC
 119  * @len: array of the lenths of the chunks in data
 120  * @dataflags:
 121  * @id: id of the host command
 122  */
 123 struct iwl_host_cmd {
 124         const void *data[IWL_MAX_CMD_TFDS];
 125         unsigned long reply_page;
 126         int handler_status;
 127
 128         u32 flags;
 129         u16 len[IWL_MAX_CMD_TFDS];
 130         u8 dataflags[IWL_MAX_CMD_TFDS];
 131         u8 id;
 132 };
 133
 134 /**
 135  * struct iwl_trans_ops - transport specific operations
 136  * @alloc: allocates the meta data (not the queues themselves)
 137  * @request_irq: requests IRQ - will be called before the FW load in probe flow
 138  * @start_device: allocates and inits all the resources for the transport
 139  *                layer.
 140  * @prepare_card_hw: claim the ownership on the HW. Will be called during
 141  *                   probe.
 142  * @tx_start: starts and configures all the Tx fifo - usually done once the fw
 143  *           is alive.
 144  * @wake_any_queue: wake all the queues of a specfic context IWL_RXON_CTX_*
 145  * @stop_device:stops the whole device (embedded CPU put to reset)
 146  * @send_cmd:send a host command
 147  * @tx: send an skb
 148  * @reclaim: free packet until ssn. Returns a list of freed packets.
 149  * @tx_agg_alloc: allocate resources for a TX BA session
 150  * @tx_agg_setup: setup a tx queue for AMPDU - will be called once the HW is
 151  *                 ready and a successful ADDBA response has been received.
 152  * @tx_agg_disable: de-configure a Tx queue to send AMPDUs
 153  * @kick_nic: remove the RESET from the embedded CPU and let it run
 154  * @free: release all the ressource for the transport layer itself such as
 155  *        irq, tasklet etc...
 156  * @stop_queue: stop a specific queue
 157  * @check_stuck_queue: check if a specific queue is stuck
 158  * @wait_tx_queue_empty: wait until all tx queues are empty
 159  * @dbgfs_register: add the dbgfs files under this directory. Files will be
 160  *      automatically deleted.
 161  * @suspend: stop the device unless WoWLAN is configured
 162  * @resume: resume activity of the device
 163  */
 164 struct iwl_trans_ops {
 165
 166         struct iwl_trans *(*alloc)(struct iwl_shared *shrd);
 167         int (*request_irq)(struct iwl_trans *iwl_trans);
 168         int (*start_device)(struct iwl_trans *trans);
 169         int (*prepare_card_hw)(struct iwl_trans *trans);
 170         void (*stop_device)(struct iwl_trans *trans);
 171         void (*tx_start)(struct iwl_trans *trans);
 172
 173         void (*wake_any_queue)(struct iwl_trans *trans,
 174                                enum iwl_rxon_context_id ctx,
 175                                const char *msg);
 176
 177         int (*send_cmd)(struct iwl_trans *trans, struct iwl_host_cmd *cmd);
 178
 179         int (*tx)(struct iwl_trans *trans, struct sk_buff *skb,
 180                 struct iwl_device_cmd *dev_cmd, enum iwl_rxon_context_id ctx,
 181                 u8 sta_id);
 182         void (*reclaim)(struct iwl_trans *trans, int sta_id, int tid,
 183                         int txq_id, int ssn, u32 status,
 184                         struct sk_buff_head *skbs);
 185
 186         int (*tx_agg_disable)(struct iwl_trans *trans,
 187                               enum iwl_rxon_context_id ctx, int sta_id,
 188                               int tid);
 189         int (*tx_agg_alloc)(struct iwl_trans *trans,
 190                             enum iwl_rxon_context_id ctx, int sta_id, int tid,
 191                             u16 *ssn);
 192         void (*tx_agg_setup)(struct iwl_trans *trans,
 193                              enum iwl_rxon_context_id ctx, int sta_id, int tid,
 194                              int frame_limit);
 195
 196         void (*kick_nic)(struct iwl_trans *trans);
 197
 198         void (*free)(struct iwl_trans *trans);
 199
 200         void (*stop_queue)(struct iwl_trans *trans, int q, const char *msg);
 201
 202         int (*dbgfs_register)(struct iwl_trans *trans, struct dentry* dir);
 203         int (*check_stuck_queue)(struct iwl_trans *trans, int q);
 204         int (*wait_tx_queue_empty)(struct iwl_trans *trans);
 205 #ifdef CONFIG_PM_SLEEP
 206         int (*suspend)(struct iwl_trans *trans);
 207         int (*resume)(struct iwl_trans *trans);
 208 #endif
 209 };
 210
 211 /* one for each uCode image (inst/data, boot/init/runtime) */
 212 struct fw_desc {
 213         dma_addr_t p_addr;      /* hardware address */
 214         void *v_addr;           /* software address */
 215         u32 len;                /* size in bytes */
 216 };
 217
 218 struct fw_img {
 219         struct fw_desc code;    /* firmware code image */
 220         struct fw_desc data;    /* firmware data image */
 221 };
 222
 223 enum iwl_ucode_type {
 224         IWL_UCODE_NONE,
 225         IWL_UCODE_REGULAR,
 226         IWL_UCODE_INIT,
 227         IWL_UCODE_WOWLAN,
 228 };
 229
 230 /**
 231  * struct iwl_trans - transport common data
 232  * @ops - pointer to iwl_trans_ops
 233  * @shrd - pointer to iwl_shared which holds shared data from the upper layer
 234  * @hcmd_lock: protects HCMD
 235  * @ucode_write_complete: indicates that the ucode has been copied.
 236  * @ucode_rt: run time ucode image
 237  * @ucode_init: init ucode image
 238  * @ucode_wowlan: wake on wireless ucode image (optional)
 239  */
 240 struct iwl_trans {
 241         const struct iwl_trans_ops *ops;
 242         struct iwl_shared *shrd;
 243         spinlock_t hcmd_lock;
 244
 245         u8 ucode_write_complete;        /* the image write is complete */
 246         struct fw_img ucode_rt;
 247         struct fw_img ucode_init;
 248         struct fw_img ucode_wowlan;
 249
 250         /* eeprom related variables */
 251         int    nvm_device_type;
 252
 253         /* pointer to trans specific struct */
 254         /*Ensure that this pointer will always be aligned to sizeof pointer */
 255         char trans_specific[0] __attribute__((__aligned__(sizeof(void *))));
 256 };
 257
 258 static inline int iwl_trans_request_irq(struct iwl_trans *trans)
 259 {
 260         return trans->ops->request_irq(trans);
 261 }
 262
 263 static inline int iwl_trans_start_device(struct iwl_trans *trans)
 264 {
 265         return trans->ops->start_device(trans);
 266 }
 267
 268 static inline int iwl_trans_prepare_card_hw(struct iwl_trans *trans)
 269 {
 270         return trans->ops->prepare_card_hw(trans);
 271 }
 272
 273 static inline void iwl_trans_stop_device(struct iwl_trans *trans)
 274 {
 275         trans->ops->stop_device(trans);
 276 }
 277
 278 static inline void iwl_trans_tx_start(struct iwl_trans *trans)
 279 {
 280         trans->ops->tx_start(trans);
 281 }
 282
 283 static inline void iwl_trans_wake_any_queue(struct iwl_trans *trans,
 284                                             enum iwl_rxon_context_id ctx,
 285                                             const char *msg)
 286 {
 287         trans->ops->wake_any_queue(trans, ctx, msg);
 288 }
 289
 290
 291 static inline int iwl_trans_send_cmd(struct iwl_trans *trans,
 292                                 struct iwl_host_cmd *cmd)
 293 {
 294         return trans->ops->send_cmd(trans, cmd);
 295 }
 296
 297 int iwl_trans_send_cmd_pdu(struct iwl_trans *trans, u8 id,
 298                            u32 flags, u16 len, const void *data);
 299
 300 static inline int iwl_trans_tx(struct iwl_trans *trans, struct sk_buff *skb,
 301                 struct iwl_device_cmd *dev_cmd, enum iwl_rxon_context_id ctx,
 302                 u8 sta_id)
 303 {
 304         return trans->ops->tx(trans, skb, dev_cmd, ctx, sta_id);
 305 }
 306
 307 static inline void iwl_trans_reclaim(struct iwl_trans *trans, int sta_id,
 308                                  int tid, int txq_id, int ssn, u32 status,
 309                                  struct sk_buff_head *skbs)
 310 {
 311         trans->ops->reclaim(trans, sta_id, tid, txq_id, ssn, status, skbs);
 312 }
 313
 314 static inline int iwl_trans_tx_agg_disable(struct iwl_trans *trans,
 315                                             enum iwl_rxon_context_id ctx,
 316                                             int sta_id, int tid)
 317 {
 318         return trans->ops->tx_agg_disable(trans, ctx, sta_id, tid);
 319 }
 320
 321 static inline int iwl_trans_tx_agg_alloc(struct iwl_trans *trans,
 322                                          enum iwl_rxon_context_id ctx,
 323                                          int sta_id, int tid, u16 *ssn)
 324 {
 325         return trans->ops->tx_agg_alloc(trans, ctx, sta_id, tid, ssn);
 326 }
 327
 328
 329 static inline void iwl_trans_tx_agg_setup(struct iwl_trans *trans,
 330                                            enum iwl_rxon_context_id ctx,
 331                                            int sta_id, int tid,
 332                                            int frame_limit)
 333 {
 334         trans->ops->tx_agg_setup(trans, ctx, sta_id, tid, frame_limit);
 335 }
 336
 337 static inline void iwl_trans_kick_nic(struct iwl_trans *trans)
 338 {
 339         trans->ops->kick_nic(trans);
 340 }
 341
 342 static inline void iwl_trans_free(struct iwl_trans *trans)
 343 {
 344         trans->ops->free(trans);
 345 }
 346
 347 static inline void iwl_trans_stop_queue(struct iwl_trans *trans, int q,
 348                                         const char *msg)
 349 {
 350         trans->ops->stop_queue(trans, q, msg);
 351 }
 352
 353 static inline int iwl_trans_wait_tx_queue_empty(struct iwl_trans *trans)
 354 {
 355         return trans->ops->wait_tx_queue_empty(trans);
 356 }
 357
 358 static inline int iwl_trans_check_stuck_queue(struct iwl_trans *trans, int q)
 359 {
 360         return trans->ops->check_stuck_queue(trans, q);
 361 }
 362 static inline int iwl_trans_dbgfs_register(struct iwl_trans *trans,
 363                                             struct dentry *dir)
 364 {
 365         return trans->ops->dbgfs_register(trans, dir);
 366 }
 367
 368 #ifdef CONFIG_PM_SLEEP
 369 static inline int iwl_trans_suspend(struct iwl_trans *trans)
 370 {
 371         return trans->ops->suspend(trans);
 372 }
 373
 374 static inline int iwl_trans_resume(struct iwl_trans *trans)
 375 {
 376         return trans->ops->resume(trans);
 377 }
 378 #endif
 379
 380 /*****************************************************
 381 * Transport layers implementations
 382 ******************************************************/
 383 extern const struct iwl_trans_ops trans_ops_pcie;
 384
 385 int iwl_alloc_fw_desc(struct iwl_bus *bus, struct fw_desc *desc,
 386                       const void *data, size_t len);
 387 void iwl_dealloc_ucode(struct iwl_trans *trans);
 388
 389 #endif /* __iwl_trans_h__ */