The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/dev/twa/tw_cl.h

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    1 /*
    2  * Copyright (c) 2004-05 Applied Micro Circuits Corporation.
    3  * Copyright (c) 2004-05 Vinod Kashyap
    4  * All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   25  * SUCH DAMAGE.
   26  *
   27  *      $FreeBSD: releng/6.0/sys/dev/twa/tw_cl.h 144966 2005-04-12 22:07:11Z vkashyap $
   28  */
   29 
   30 /*
   31  * AMCC'S 3ware driver for 9000 series storage controllers.
   32  *
   33  * Author: Vinod Kashyap
   34  */
   35 
   36 
   37 
   38 #ifndef TW_CL_H
   39 
   40 #define TW_CL_H
   41 
   42 
   43 /*
   44  * Common Layer internal macros, structures and functions.
   45  */
   46 
   47 
   48 #define TW_CLI_SECTOR_SIZE              0x200
   49 #define TW_CLI_REQUEST_TIMEOUT_PERIOD   60 /* seconds */
   50 #define TW_CLI_RESET_TIMEOUT_PERIOD     60 /* seconds */
   51 #define TW_CLI_MAX_RESET_ATTEMPTS       2
   52 
   53 #ifdef TW_OSL_FLASH_FIRMWARE
   54 /* Number of chunks the fw image is broken into, while flashing. */
   55 #define TW_CLI_NUM_FW_IMAGE_CHUNKS      500
   56 #endif /* TW_OSL_FLASH_FIRMWARE */
   57 
   58 /* Possible values of ctlr->state. */
   59 /* Initialization done, and controller is active. */
   60 #define TW_CLI_CTLR_STATE_ACTIVE                (1<<0)
   61 /* Interrupts on controller enabled. */
   62 #define TW_CLI_CTLR_STATE_INTR_ENABLED          (1<<1)
   63 /* Data buffer for internal requests in use. */
   64 #define TW_CLI_CTLR_STATE_INTERNAL_REQ_BUSY     (1<<2)
   65 /* More AEN's need to be retrieved. */
   66 #define TW_CLI_CTLR_STATE_GET_MORE_AENS         (1<<3)
   67 /* Controller is being reset. */
   68 #define TW_CLI_CTLR_STATE_RESET_IN_PROGRESS     (1<<4)
   69 
   70 /* Possible values of ctlr->ioctl_lock.lock. */
   71 #define TW_CLI_LOCK_FREE                0x0     /* lock is free */
   72 #define TW_CLI_LOCK_HELD                0x1     /* lock is held */
   73 
   74 /* Possible values of req->state. */
   75 #define TW_CLI_REQ_STATE_INIT           0x0     /* being initialized */
   76 #define TW_CLI_REQ_STATE_BUSY           0x1     /* submitted to controller */
   77 #define TW_CLI_REQ_STATE_PENDING        0x2     /* in pending queue */
   78 #define TW_CLI_REQ_STATE_COMPLETE       0x3     /* completed by controller */
   79 
   80 /* Possible values of req->flags. */
   81 #define TW_CLI_REQ_FLAGS_7K             (1<<0)  /* 7000 cmd pkt */
   82 #define TW_CLI_REQ_FLAGS_9K             (1<<1)  /* 9000 cmd pkt */
   83 #define TW_CLI_REQ_FLAGS_INTERNAL       (1<<2)  /* internal request */
   84 #define TW_CLI_REQ_FLAGS_PASSTHRU       (1<<3)  /* passthru request */
   85 #define TW_CLI_REQ_FLAGS_EXTERNAL       (1<<4)  /* external request */
   86 
   87 #ifdef TW_OSL_PCI_CONFIG_ACCESSIBLE
   88 /* Register offsets in PCI config space. */
   89 #define TW_CLI_PCI_CONFIG_COMMAND_OFFSET        0x4 /* cmd register offset */
   90 #define TW_CLI_PCI_CONFIG_STATUS_OFFSET         0x6 /* status register offset */
   91 #endif /* TW_OSL_PCI_CONFIG_ACCESSIBLE */
   92 
   93 #pragma pack(1)
   94 
   95 #ifdef TW_OSL_DEBUG
   96 struct tw_cli_q_stats {
   97         TW_UINT32       cur_len;/* current # of entries in q */
   98         TW_UINT32       max_len;         /* max # of entries in q, ever reached */
   99 };
  100 #endif /* TW_OSL_DEBUG */
  101 
  102 
  103 /* Queues of CL internal request context packets. */
  104 #define TW_CLI_FREE_Q           0       /* free q */
  105 #define TW_CLI_BUSY_Q           1       /* q of reqs submitted to fw */
  106 #define TW_CLI_PENDING_Q        2       /* q of reqs deferred due to 'q full' */
  107 #define TW_CLI_COMPLETE_Q       3       /* q of reqs completed by fw */
  108 #define TW_CLI_Q_COUNT          4       /* total number of queues */
  109 
  110 
  111 /* CL's internal request context. */
  112 struct tw_cli_req_context {
  113         struct tw_cl_req_handle *req_handle;/* handle to track requests between
  114                                                 OSL & CL */
  115         struct tw_cli_ctlr_context  *ctlr; /* ptr to CL's controller context */
  116         struct tw_cl_command_packet *cmd_pkt;/* ptr to ctlr cmd pkt */
  117         TW_UINT64       cmd_pkt_phys;   /* cmd pkt physical address */
  118         TW_VOID         *data;          /* ptr to data being passed to fw */
  119         TW_UINT32       length;         /* length of data being passed to fw */
  120         TW_UINT64       data_phys;      /* physical address of data */
  121 
  122         TW_UINT32       state;          /* request state */
  123         TW_UINT32       flags;          /* request flags */
  124 
  125         TW_UINT32       error_code;     /* error encountered before submission
  126                                         of request to fw, if any */
  127 
  128         TW_VOID         *orig_req;      /* ptr to original request for use
  129                                         during callback */
  130         TW_VOID         (*tw_cli_callback)(struct tw_cli_req_context *req);
  131                                         /* CL internal callback */
  132         TW_UINT32       request_id;     /* request id for tracking with fw */
  133         struct tw_cl_link link;         /* to link this request in a list */
  134 };
  135 
  136 
  137 /* CL's internal controller context. */
  138 struct tw_cli_ctlr_context {
  139         struct tw_cl_ctlr_handle *ctlr_handle;  /* handle to track ctlr between
  140                                                         OSL & CL. */
  141         struct tw_cli_req_context *req_ctxt_buf;/* pointer to the array of CL's
  142                                                 internal request context pkts */
  143 
  144 #ifdef TW_OSL_NON_DMA_MEM_ALLOC_PER_REQUEST
  145 
  146         TW_UINT32               free_req_ids[TW_CL_MAX_SIMULTANEOUS_REQUESTS];
  147                                                 /* Array of free req_id's */
  148         struct tw_cli_req_context *busy_reqs[TW_CL_MAX_SIMULTANEOUS_REQUESTS + 1];
  149                                 /* Array of busy reqs -- index is req_id */
  150         TW_UINT32               free_req_head;
  151         TW_UINT32               free_req_tail;
  152         TW_UINT32               num_free_req_ids;
  153 
  154 #endif /* TW_OSL_DMA_MEM_ALLOC_PER_REQUEST */
  155 
  156         struct tw_cl_command_packet *cmd_pkt_buf;/* ptr to array of cmd pkts */
  157 
  158         TW_UINT64               cmd_pkt_phys;   /* phys addr of cmd_pkt_buf */
  159 
  160         TW_UINT32               state;          /* controller state */
  161         TW_UINT32               flags;          /* controller settings */
  162 
  163         /* Request queues and arrays. */
  164         struct tw_cl_link       req_q_head[TW_CLI_Q_COUNT];
  165 
  166 #ifdef TW_OSL_FLASH_FIRMWARE
  167         TW_VOID                 *flash_dma_mem; /* mem for flashing fw image */
  168         TW_UINT64               flash_dma_mem_phys;/* flash_dma_mem phys addr */
  169 #endif /* TW_OSL_FLASH_FIRMWARE */
  170 
  171         TW_UINT8                *internal_req_data;/* internal req data buf */
  172         TW_UINT64               internal_req_data_phys;/* phys addr of internal
  173                                                         req data buf */
  174         TW_UINT32               max_simult_reqs; /* max simultaneous requests
  175                                                         supported */
  176         TW_UINT32               max_aens_supported;/* max AEN's supported */
  177         /* AEN handler fields. */
  178         struct tw_cl_event_packet *aen_queue;   /* circular queue of AENs from
  179                                                         firmware/CL/OSL */
  180         TW_UINT32               aen_head;       /* AEN queue head */
  181         TW_UINT32               aen_tail;       /* AEN queue tail */
  182         TW_UINT32               aen_cur_seq_id; /* index of the last event+1 */
  183         TW_UINT32               aen_q_overflow; /* indicates if unretrieved
  184                                                 events were overwritten */
  185         TW_UINT32               aen_q_wrapped;  /* indicates if AEN queue ever
  186                                                         wrapped */
  187 
  188         TW_UINT16               working_srl;    /* driver & firmware negotiated
  189                                                         srl */
  190         TW_UINT16               working_branch; /* branch # of the firmware
  191                                         that the driver is compatible with */
  192         TW_UINT16               working_build;  /* build # of the firmware
  193                                         that the driver is compatible with */
  194         TW_UINT32               operating_mode; /* base mode/current mode */
  195 
  196         TW_INT32                host_intr_pending;/* host intr processing
  197                                                         needed */
  198         TW_INT32                attn_intr_pending;/* attn intr processing
  199                                                         needed */
  200         TW_INT32                cmd_intr_pending;/* cmd intr processing
  201                                                         needed */
  202         TW_INT32                resp_intr_pending;/* resp intr processing
  203                                                         needed */
  204 
  205         TW_LOCK_HANDLE          gen_lock_handle;/* general purpose lock */
  206         TW_LOCK_HANDLE          *gen_lock;/* ptr to general purpose lock */
  207         TW_LOCK_HANDLE          io_lock_handle; /* lock held during cmd
  208                                                 submission */
  209         TW_LOCK_HANDLE          *io_lock;/* ptr to lock held during cmd
  210                                                 submission */
  211         TW_LOCK_HANDLE          intr_lock_handle;/* lock held during
  212                                                 ISR/response intr processing */
  213         TW_LOCK_HANDLE          *intr_lock;/* ptr to lock held during ISR/
  214                                                 response intr processing */
  215 
  216 #ifdef TW_OSL_CAN_SLEEP
  217         TW_SLEEP_HANDLE         sleep_handle;   /* handle to co-ordinate sleeps
  218                                                 & wakeups */
  219 #endif /* TW_OSL_CAN_SLEEP */
  220 
  221         struct {
  222                 TW_UINT32       lock;           /* lock state */
  223                 TW_TIME         timeout;        /* time at which the lock will
  224                                                 become available, even if not
  225                                                 explicitly released */
  226         } ioctl_lock;           /* lock for use by user applications, for
  227                                 synchronization between ioctl calls */
  228 #ifdef TW_OSL_DEBUG
  229         struct tw_cli_q_stats   q_stats[TW_CLI_Q_COUNT];/* queue statistics */
  230 #endif /* TW_OSL_DEBUG */
  231 };
  232 
  233 #pragma pack()
  234 
  235 
  236 /*
  237  * Queue primitives
  238  */
  239 
  240 #ifdef TW_OSL_DEBUG
  241 
  242 #define TW_CLI_Q_INIT(ctlr, q_type)     do {                            \
  243         (ctlr)->q_stats[q_type].cur_len = 0;                            \
  244         (ctlr)->q_stats[q_type].max_len = 0;                            \
  245 } while (0)
  246 
  247 
  248 #define TW_CLI_Q_INSERT(ctlr, q_type)   do {                            \
  249         struct tw_cli_q_stats *q_stats = &((ctlr)->q_stats[q_type]);    \
  250                                                                         \
  251         if (++(q_stats->cur_len) > q_stats->max_len)                    \
  252                 q_stats->max_len = q_stats->cur_len;                    \
  253 } while (0)
  254 
  255 
  256 #define TW_CLI_Q_REMOVE(ctlr, q_type)                                   \
  257         (ctlr)->q_stats[q_type].cur_len--
  258 
  259 #else /* TW_OSL_DEBUG */
  260 
  261 #define TW_CLI_Q_INIT(ctlr, q_index)
  262 #define TW_CLI_Q_INSERT(ctlr, q_index)
  263 #define TW_CLI_Q_REMOVE(ctlr, q_index)
  264 
  265 #endif /* TW_OSL_DEBUG */
  266 
  267 
  268 /* Initialize a queue of requests. */
  269 static __inline TW_VOID
  270 tw_cli_req_q_init(struct tw_cli_ctlr_context *ctlr, TW_UINT8 q_type)
  271 {
  272         TW_CL_Q_INIT(&(ctlr->req_q_head[q_type]));
  273         TW_CLI_Q_INIT(ctlr, q_type);
  274 }
  275 
  276 
  277 
  278 /* Insert the given request at the head of the given queue (q_type). */
  279 static __inline TW_VOID
  280 tw_cli_req_q_insert_head(struct tw_cli_req_context *req, TW_UINT8 q_type)
  281 {
  282         struct tw_cli_ctlr_context      *ctlr = req->ctlr;
  283 
  284 #ifdef TW_OSL_NON_DMA_MEM_ALLOC_PER_REQUEST
  285         if ((q_type == TW_CLI_BUSY_Q) || (q_type == TW_CLI_COMPLETE_Q) ||
  286                 ((q_type == TW_CLI_PENDING_Q) &&
  287                 (!(req->flags & TW_CLI_REQ_FLAGS_INTERNAL))))
  288                 return;
  289 #endif /* TW_OSL_NON_DMA_MEM_ALLOC_PER_REQUEST */
  290 
  291         tw_osl_get_lock(ctlr->ctlr_handle, ctlr->gen_lock);
  292         TW_CL_Q_INSERT_HEAD(&(ctlr->req_q_head[q_type]), &(req->link));
  293         TW_CLI_Q_INSERT(ctlr, q_type);
  294         tw_osl_free_lock(ctlr->ctlr_handle, ctlr->gen_lock);
  295 }
  296 
  297 
  298 
  299 /* Insert the given request at the tail of the given queue (q_type). */
  300 static __inline TW_VOID
  301 tw_cli_req_q_insert_tail(struct tw_cli_req_context *req, TW_UINT8 q_type)
  302 {
  303         struct tw_cli_ctlr_context      *ctlr = req->ctlr;
  304 
  305 #ifdef TW_OSL_NON_DMA_MEM_ALLOC_PER_REQUEST
  306         if ((q_type == TW_CLI_BUSY_Q) || (q_type == TW_CLI_COMPLETE_Q) ||
  307                 ((q_type == TW_CLI_PENDING_Q) &&
  308                 (!(req->flags & TW_CLI_REQ_FLAGS_INTERNAL))))
  309                 return;
  310         if ((q_type == TW_CLI_FREE_Q) &&
  311                 (!(req->flags & TW_CLI_REQ_FLAGS_INTERNAL))) {
  312                 ctlr->free_req_ids[ctlr->free_req_tail] = req->request_id;
  313                 ctlr->busy_reqs[req->request_id] = TW_CL_NULL;
  314                 ctlr->free_req_tail = (ctlr->free_req_tail + 1) %
  315                         (ctlr->max_simult_reqs - 1);
  316                 ctlr->num_free_req_ids++;
  317                 return;
  318         }
  319 #endif /* TW_OSL_NON_DMA_MEM_ALLOC_PER_REQUEST */
  320 
  321         tw_osl_get_lock(ctlr->ctlr_handle, ctlr->gen_lock);
  322         TW_CL_Q_INSERT_TAIL(&(ctlr->req_q_head[q_type]), &(req->link));
  323         TW_CLI_Q_INSERT(ctlr, q_type);
  324         tw_osl_free_lock(ctlr->ctlr_handle, ctlr->gen_lock);
  325 }
  326 
  327 
  328 
  329 /* Remove and return the request at the head of the given queue (q_type). */
  330 static __inline struct tw_cli_req_context *
  331 tw_cli_req_q_remove_head(struct tw_cli_ctlr_context *ctlr, TW_UINT8 q_type)
  332 {
  333         struct tw_cli_req_context       *req = TW_CL_NULL;
  334         struct tw_cl_link               *link;
  335 
  336 #ifdef TW_OSL_NON_DMA_MEM_ALLOC_PER_REQUEST
  337         if ((q_type == TW_CLI_BUSY_Q) || (q_type == TW_CLI_COMPLETE_Q))
  338                 return(req);
  339 #endif /* TW_OSL_NON_DMA_MEM_ALLOC_PER_REQUEST */
  340 
  341         tw_osl_get_lock(ctlr->ctlr_handle, ctlr->gen_lock);
  342         if ((link = TW_CL_Q_FIRST_ITEM(&(ctlr->req_q_head[q_type]))) !=
  343                 TW_CL_NULL) {
  344                 req = TW_CL_STRUCT_HEAD(link,
  345                         struct tw_cli_req_context, link);
  346                 TW_CL_Q_REMOVE_ITEM(&(ctlr->req_q_head[q_type]), &(req->link));
  347                 TW_CLI_Q_REMOVE(ctlr, q_type);
  348         }
  349         tw_osl_free_lock(ctlr->ctlr_handle, ctlr->gen_lock);
  350         return(req);
  351 }
  352 
  353 
  354 
  355 /* Remove the given request from the given queue (q_type). */
  356 static __inline TW_VOID
  357 tw_cli_req_q_remove_item(struct tw_cli_req_context *req, TW_UINT8 q_type)
  358 {
  359         struct tw_cli_ctlr_context      *ctlr = req->ctlr;
  360 
  361 #ifdef TW_OSL_NON_DMA_MEM_ALLOC_PER_REQUEST
  362         if ((q_type == TW_CLI_BUSY_Q) || (q_type == TW_CLI_COMPLETE_Q) ||
  363                 ((q_type == TW_CLI_PENDING_Q) &&
  364                 (!(req->flags & TW_CLI_REQ_FLAGS_INTERNAL))))
  365                 return;
  366 #endif /* TW_OSL_NON_DMA_MEM_ALLOC_PER_REQUEST */
  367 
  368         tw_osl_get_lock(ctlr->ctlr_handle, ctlr->gen_lock);
  369         TW_CL_Q_REMOVE_ITEM(&(ctlr->req_q_head[q_type]), &(req->link));
  370         TW_CLI_Q_REMOVE(ctlr, q_type);
  371         tw_osl_free_lock(ctlr->ctlr_handle, ctlr->gen_lock);
  372 }
  373 
  374 
  375 
  376 /* Create an event packet for an event/error posted by the controller. */
  377 #define tw_cli_create_ctlr_event(ctlr, event_src, cmd_hdr)      do {    \
  378         TW_UINT8 severity =                                             \
  379                 GET_SEVERITY((cmd_hdr)->status_block.res__severity);    \
  380                                                                         \
  381         tw_cl_create_event(ctlr->ctlr_handle, TW_CL_TRUE, event_src,    \
  382                 (cmd_hdr)->status_block.error,                          \
  383                 severity,                                               \
  384                 tw_cli_severity_string_table[severity],                 \
  385                 (cmd_hdr)->err_specific_desc +                          \
  386                 tw_osl_strlen((cmd_hdr)->err_specific_desc) + 1,        \
  387                 (cmd_hdr)->err_specific_desc);                          \
  388         /* Print 18 bytes of sense information. */                      \
  389         tw_cli_dbg_printf(2, ctlr->ctlr_handle,                         \
  390                 tw_osl_cur_func(),                                      \
  391                 "sense info: %x %x %x %x %x %x %x %x %x "               \
  392                 "%x %x %x %x %x %x %x %x %x",                           \
  393                 (cmd_hdr)->sense_data[0], (cmd_hdr)->sense_data[1],     \
  394                 (cmd_hdr)->sense_data[2], (cmd_hdr)->sense_data[3],     \
  395                 (cmd_hdr)->sense_data[4], (cmd_hdr)->sense_data[5],     \
  396                 (cmd_hdr)->sense_data[6], (cmd_hdr)->sense_data[7],     \
  397                 (cmd_hdr)->sense_data[8], (cmd_hdr)->sense_data[9],     \
  398                 (cmd_hdr)->sense_data[10], (cmd_hdr)->sense_data[11],   \
  399                 (cmd_hdr)->sense_data[12], (cmd_hdr)->sense_data[13],   \
  400                 (cmd_hdr)->sense_data[14], (cmd_hdr)->sense_data[15],   \
  401                 (cmd_hdr)->sense_data[16], (cmd_hdr)->sense_data[17]);  \
  402 } while (0)
  403 
  404 
  405 
  406 #endif /* TW_CL_H */

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