LCOV - code coverage report
Current view: top level - drivers/scsi/snic - snic_fwint.h (source / functions) Hit Total Coverage
Test: combined.info Lines: 0 20 0.0 %
Date: 2022-04-01 14:17:54 Functions: 0 0 -
Branches: 0 6 0.0 %

           Branch data     Line data    Source code
       1                 :            : /*
       2                 :            :  * Copyright 2014 Cisco Systems, Inc.  All rights reserved.
       3                 :            :  *
       4                 :            :  * This program is free software; you may redistribute it and/or modify
       5                 :            :  * it under the terms of the GNU General Public License as published by
       6                 :            :  * the Free Software Foundation; version 2 of the License.
       7                 :            :  *
       8                 :            :  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
       9                 :            :  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
      10                 :            :  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
      11                 :            :  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
      12                 :            :  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
      13                 :            :  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
      14                 :            :  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
      15                 :            :  * SOFTWARE.
      16                 :            :  */
      17                 :            : 
      18                 :            : #ifndef __SNIC_FWINT_H
      19                 :            : #define __SNIC_FWINT_H
      20                 :            : 
      21                 :            : #define SNIC_CDB_LEN    32      /* SCSI CDB size 32, can be used for 16 bytes */
      22                 :            : #define LUN_ADDR_LEN    8
      23                 :            : 
      24                 :            : /*
      25                 :            :  * Command entry type
      26                 :            :  */
      27                 :            : enum snic_io_type {
      28                 :            :         /*
      29                 :            :          * Initiator request types
      30                 :            :          */
      31                 :            :         SNIC_REQ_REPORT_TGTS = 0x2,     /* Report Targets */
      32                 :            :         SNIC_REQ_ICMND,                 /* Initiator command for SCSI IO */
      33                 :            :         SNIC_REQ_ITMF,                  /* Initiator command for Task Mgmt */
      34                 :            :         SNIC_REQ_HBA_RESET,             /* SNIC Reset */
      35                 :            :         SNIC_REQ_EXCH_VER,              /* Exchange Version Information */
      36                 :            :         SNIC_REQ_TGT_INFO,              /* Backend/Target Information */
      37                 :            :         SNIC_REQ_BOOT_LUNS,
      38                 :            : 
      39                 :            :         /*
      40                 :            :          * Response type
      41                 :            :          */
      42                 :            :         SNIC_RSP_REPORT_TGTS_CMPL = 0x12,/* Report Targets Completion */
      43                 :            :         SNIC_RSP_ICMND_CMPL,            /* SCSI IO Completion */
      44                 :            :         SNIC_RSP_ITMF_CMPL,             /* Task Management Completion */
      45                 :            :         SNIC_RSP_HBA_RESET_CMPL,        /* SNIC Reset Completion */
      46                 :            :         SNIC_RSP_EXCH_VER_CMPL,         /* Exchange Version Completion*/
      47                 :            :         SNIC_RSP_BOOT_LUNS_CMPL,
      48                 :            : 
      49                 :            :         /*
      50                 :            :          * Misc Request types
      51                 :            :          */
      52                 :            :         SNIC_MSG_ACK = 0x80,            /* Ack: snic_notify_msg */
      53                 :            :         SNIC_MSG_ASYNC_EVNOTIFY,        /* Asynchronous Event Notification */
      54                 :            : }; /* end of enum snic_io_type */
      55                 :            : 
      56                 :            : 
      57                 :            : /*
      58                 :            :  * Header status codes from firmware
      59                 :            :  */
      60                 :            : enum snic_io_status {
      61                 :            :         SNIC_STAT_IO_SUCCESS = 0,       /* request was successful */
      62                 :            : 
      63                 :            :         /*
      64                 :            :          * If a request to the fw is rejected, the original request header
      65                 :            :          * will be returned with the status set to one of the following:
      66                 :            :          */
      67                 :            :         SNIC_STAT_INVALID_HDR,  /* header contains invalid data */
      68                 :            :         SNIC_STAT_OUT_OF_RES,   /* out of resources to complete request */
      69                 :            :         SNIC_STAT_INVALID_PARM, /* some parameter in request is not valid */
      70                 :            :         SNIC_STAT_REQ_NOT_SUP,  /* req type is not supported */
      71                 :            :         SNIC_STAT_IO_NOT_FOUND, /* requested IO was not found */
      72                 :            : 
      73                 :            :         /*
      74                 :            :          * Once a request is processed, the fw will usually return
      75                 :            :          * a cmpl message type. In cases where errors occurred,
      76                 :            :          * the header status would be filled in with one of the following:
      77                 :            :          */
      78                 :            :         SNIC_STAT_ABORTED,              /* req was aborted */
      79                 :            :         SNIC_STAT_TIMEOUT,              /* req was timed out */
      80                 :            :         SNIC_STAT_SGL_INVALID,          /* req was aborted due to sgl error */
      81                 :            :         SNIC_STAT_DATA_CNT_MISMATCH,    /*recv/sent more/less data than expec */
      82                 :            :         SNIC_STAT_FW_ERR,               /* req was terminated due to fw error */
      83                 :            :         SNIC_STAT_ITMF_REJECT,          /* itmf req was rejected by target */
      84                 :            :         SNIC_STAT_ITMF_FAIL,            /* itmf req was failed */
      85                 :            :         SNIC_STAT_ITMF_INCORRECT_LUN,   /* itmf req has incorrect LUN id*/
      86                 :            :         SNIC_STAT_CMND_REJECT,          /* req was invalid and rejected */
      87                 :            :         SNIC_STAT_DEV_OFFLINE,          /* req sent to offline device */
      88                 :            :         SNIC_STAT_NO_BOOTLUN,
      89                 :            :         SNIC_STAT_SCSI_ERR,             /* SCSI error returned by Target. */
      90                 :            :         SNIC_STAT_NOT_READY,            /* sNIC Subsystem is not ready */
      91                 :            :         SNIC_STAT_FATAL_ERROR,          /* sNIC is in unrecoverable state */
      92                 :            : }; /* end of enum snic_io_status */
      93                 :            : 
      94                 :            : /*
      95                 :            :  * snic_io_hdr : host <--> firmware
      96                 :            :  *
      97                 :            :  * for any other message that will be queued to firmware should
      98                 :            :  *  have the following request header
      99                 :            :  */
     100                 :            : struct snic_io_hdr {
     101                 :            :         __le32  hid;
     102                 :            :         __le32  cmnd_id;        /* tag here */
     103                 :            :         ulong   init_ctx;       /* initiator context */
     104                 :            :         u8      type;           /* request/response type */
     105                 :            :         u8      status;         /* header status entry */
     106                 :            :         u8      protocol;       /* Protocol specific, may needed for RoCE*/
     107                 :            :         u8      flags;
     108                 :            :         __le16  sg_cnt;
     109                 :            :         u16     resvd;
     110                 :            : };
     111                 :            : 
     112                 :            : /* auxillary funciton for encoding the snic_io_hdr */
     113                 :            : static inline void
     114                 :          0 : snic_io_hdr_enc(struct snic_io_hdr *hdr, u8 typ, u8 status, u32 id, u32 hid,
     115                 :            :                 u16 sg_cnt, ulong ctx)
     116                 :            : {
     117                 :          0 :         hdr->type = typ;
     118                 :          0 :         hdr->status = status;
     119                 :          0 :         hdr->protocol = 0;
     120                 :          0 :         hdr->hid = cpu_to_le32(hid);
     121                 :          0 :         hdr->cmnd_id = cpu_to_le32(id);
     122                 :          0 :         hdr->sg_cnt = cpu_to_le16(sg_cnt);
     123                 :          0 :         hdr->init_ctx = ctx;
     124                 :          0 :         hdr->flags = 0;
     125                 :            : }
     126                 :            : 
     127                 :            : /* auxillary funciton for decoding the snic_io_hdr */
     128                 :            : static inline void
     129                 :          0 : snic_io_hdr_dec(struct snic_io_hdr *hdr, u8 *typ, u8 *stat, u32 *cmnd_id,
     130                 :            :                 u32 *hid, ulong *ctx)
     131                 :            : {
     132                 :          0 :         *typ = hdr->type;
     133                 :          0 :         *stat = hdr->status;
     134                 :          0 :         *hid = le32_to_cpu(hdr->hid);
     135                 :          0 :         *cmnd_id = le32_to_cpu(hdr->cmnd_id);
     136   [ #  #  #  #  :          0 :         *ctx = hdr->init_ctx;
                   #  # ]
     137                 :            : }
     138                 :            : 
     139                 :            : /*
     140                 :            :  * snic_host_info: host -> firmware
     141                 :            :  *
     142                 :            :  * Used for sending host information to firmware, and request fw version
     143                 :            :  */
     144                 :            : struct snic_exch_ver_req {
     145                 :            :         __le32  drvr_ver;       /* for debugging, when fw dump captured */
     146                 :            :         __le32  os_type;        /* for OS specific features */
     147                 :            : };
     148                 :            : 
     149                 :            : /*
     150                 :            :  * os_type flags
     151                 :            :  * Bit 0-7 : OS information
     152                 :            :  * Bit 8-31: Feature/Capability Information
     153                 :            :  */
     154                 :            : #define SNIC_OS_LINUX   0x1
     155                 :            : #define SNIC_OS_WIN     0x2
     156                 :            : #define SNIC_OS_ESX     0x3
     157                 :            : 
     158                 :            : /*
     159                 :            :  * HBA Capabilities
     160                 :            :  * Bit 1: Reserved.
     161                 :            :  * Bit 2: Dynamic Discovery of LUNs.
     162                 :            :  * Bit 3: Async event notifications on on tgt online/offline events.
     163                 :            :  * Bit 4: IO timeout support in FW.
     164                 :            :  * Bit 5-31: Reserved.
     165                 :            :  */
     166                 :            : #define SNIC_HBA_CAP_DDL        0x02    /* Supports Dynamic Discovery of LUNs */
     167                 :            : #define SNIC_HBA_CAP_AEN        0x04    /* Supports Async Event Noitifcation */
     168                 :            : #define SNIC_HBA_CAP_TMO        0x08    /* Supports IO timeout in FW */
     169                 :            : 
     170                 :            : /*
     171                 :            :  * snic_exch_ver_rsp : firmware -> host
     172                 :            :  *
     173                 :            :  * Used by firmware to send response to version request
     174                 :            :  */
     175                 :            : struct snic_exch_ver_rsp {
     176                 :            :         __le32  version;
     177                 :            :         __le32  hid;
     178                 :            :         __le32  max_concur_ios;         /* max concurrent ios */
     179                 :            :         __le32  max_sgs_per_cmd;        /* max sgls per IO */
     180                 :            :         __le32  max_io_sz;              /* max io size supported */
     181                 :            :         __le32  hba_cap;                /* hba capabilities */
     182                 :            :         __le32  max_tgts;               /* max tgts supported */
     183                 :            :         __le16  io_timeout;             /* FW extended timeout */
     184                 :            :         u16     rsvd;
     185                 :            : };
     186                 :            : 
     187                 :            : 
     188                 :            : /*
     189                 :            :  * snic_report_tgts : host -> firmware request
     190                 :            :  *
     191                 :            :  * Used by the host to request list of targets
     192                 :            :  */
     193                 :            : struct snic_report_tgts {
     194                 :            :         __le16  sg_cnt;
     195                 :            :         __le16  flags;          /* specific flags from fw */
     196                 :            :         u8      _resvd[4];
     197                 :            :         __le64  sg_addr;        /* Points to SGL */
     198                 :            :         __le64  sense_addr;
     199                 :            : };
     200                 :            : 
     201                 :            : enum snic_type {
     202                 :            :         SNIC_NONE = 0x0,
     203                 :            :         SNIC_DAS,
     204                 :            :         SNIC_SAN,
     205                 :            : };
     206                 :            : 
     207                 :            : 
     208                 :            : /* Report Target Response */
     209                 :            : enum snic_tgt_type {
     210                 :            :         SNIC_TGT_NONE = 0x0,
     211                 :            :         SNIC_TGT_DAS,   /* DAS Target */
     212                 :            :         SNIC_TGT_SAN,   /* SAN Target */
     213                 :            : };
     214                 :            : 
     215                 :            : /* target id format */
     216                 :            : struct snic_tgt_id {
     217                 :            :         __le32  tgt_id;         /* target id */
     218                 :            :         __le16  tgt_type;       /* tgt type */
     219                 :            :         __le16  vnic_id;        /* corresponding vnic id */
     220                 :            : };
     221                 :            : 
     222                 :            : /*
     223                 :            :  * snic_report_tgts_cmpl : firmware -> host response
     224                 :            :  *
     225                 :            :  * Used by firmware to send response to Report Targets request
     226                 :            :  */
     227                 :            : struct snic_report_tgts_cmpl {
     228                 :            :         __le32  tgt_cnt;        /* Number of Targets accessible */
     229                 :            :         u32     _resvd;
     230                 :            : };
     231                 :            : 
     232                 :            : /*
     233                 :            :  * Command flags
     234                 :            :  *
     235                 :            :  * Bit 0: Read flags
     236                 :            :  * Bit 1: Write flag
     237                 :            :  * Bit 2: ESGL - sg/esg array contains extended sg
     238                 :            :  *        ESGE - is a host buffer contains sg elements
     239                 :            :  * Bit 3-4: Task Attributes
     240                 :            :  *              00b - simple
     241                 :            :  *              01b - head of queue
     242                 :            :  *              10b - ordered
     243                 :            :  * Bit 5-7: Priority - future use
     244                 :            :  * Bit 8-15: Reserved
     245                 :            :  */
     246                 :            : 
     247                 :            : #define SNIC_ICMND_WR           0x01    /* write command */
     248                 :            : #define SNIC_ICMND_RD           0x02    /* read command */
     249                 :            : #define SNIC_ICMND_ESGL         0x04    /* SGE/ESGE array contains valid data*/
     250                 :            : 
     251                 :            : /*
     252                 :            :  * Priority/Task Attribute settings
     253                 :            :  */
     254                 :            : #define SNIC_ICMND_TSK_SHIFT            2       /* task attr starts at bit 2 */
     255                 :            : #define SNIC_ICMND_TSK_MASK(x)          ((x>>SNIC_ICMND_TSK_SHIFT) & ~(0xffff))
     256                 :            : #define SNIC_ICMND_TSK_SIMPLE           0       /* simple task attr */
     257                 :            : #define SNIC_ICMND_TSK_HEAD_OF_QUEUE    1       /* head of qeuue task attr */
     258                 :            : #define SNIC_ICMND_TSK_ORDERED          2       /* ordered task attr */
     259                 :            : 
     260                 :            : #define SNIC_ICMND_PRI_SHIFT            5       /* prio val starts at bit 5 */
     261                 :            : 
     262                 :            : /*
     263                 :            :  * snic_icmnd : host-> firmware request
     264                 :            :  *
     265                 :            :  * used for sending out an initiator SCSI 16/32-byte command
     266                 :            :  */
     267                 :            : struct snic_icmnd {
     268                 :            :         __le16  sg_cnt;         /* Number of SG Elements */
     269                 :            :         __le16  flags;          /* flags */
     270                 :            :         __le32  sense_len;      /* Sense buffer length */
     271                 :            :         __le64  tgt_id;         /* Destination Target ID */
     272                 :            :         __le64  lun_id;         /* Destination LUN ID */
     273                 :            :         u8      cdb_len;
     274                 :            :         u8      _resvd;
     275                 :            :         __le16  time_out;       /* ms time for Res allocations fw to handle io*/
     276                 :            :         __le32  data_len;       /* Total number of bytes to be transferred */
     277                 :            :         u8      cdb[SNIC_CDB_LEN];
     278                 :            :         __le64  sg_addr;        /* Points to SG List */
     279                 :            :         __le64  sense_addr;     /* Sense buffer address */
     280                 :            : };
     281                 :            : 
     282                 :            : 
     283                 :            : /* Response flags */
     284                 :            : /* Bit 0: Under run
     285                 :            :  * Bit 1: Over Run
     286                 :            :  * Bit 2-7: Reserved
     287                 :            :  */
     288                 :            : #define SNIC_ICMND_CMPL_UNDR_RUN        0x01    /* resid under and valid */
     289                 :            : #define SNIC_ICMND_CMPL_OVER_RUN        0x02    /* resid over and valid */
     290                 :            : 
     291                 :            : /*
     292                 :            :  * snic_icmnd_cmpl: firmware -> host response
     293                 :            :  *
     294                 :            :  * Used for sending the host a response to an icmnd (initiator command)
     295                 :            :  */
     296                 :            : struct snic_icmnd_cmpl {
     297                 :            :         u8      scsi_status;    /* value as per SAM */
     298                 :            :         u8      flags;
     299                 :            :         __le16  sense_len;      /* Sense Length */
     300                 :            :         __le32  resid;          /* Residue : # bytes under or over run */
     301                 :            : };
     302                 :            : 
     303                 :            : /*
     304                 :            :  * snic_itmf: host->firmware request
     305                 :            :  *
     306                 :            :  * used for requesting the firmware to abort a request and/or send out
     307                 :            :  * a task management function
     308                 :            :  *
     309                 :            :  * the req_id field is valid in case of abort task and clear task
     310                 :            :  */
     311                 :            : struct snic_itmf {
     312                 :            :         u8      tm_type;        /* SCSI Task Management request */
     313                 :            :         u8      resvd;
     314                 :            :         __le16  flags;          /* flags */
     315                 :            :         __le32  req_id;         /* Command id of snic req to be aborted */
     316                 :            :         __le64  tgt_id;         /* Target ID */
     317                 :            :         __le64  lun_id;         /* Destination LUN ID */
     318                 :            :         __le16  timeout;        /* in sec */
     319                 :            : };
     320                 :            : 
     321                 :            : /*
     322                 :            :  * Task Management Request
     323                 :            :  */
     324                 :            : enum snic_itmf_tm_type {
     325                 :            :         SNIC_ITMF_ABTS_TASK = 0x01,     /* Abort Task */
     326                 :            :         SNIC_ITMF_ABTS_TASK_SET,        /* Abort Task Set */
     327                 :            :         SNIC_ITMF_CLR_TASK,             /* Clear Task */
     328                 :            :         SNIC_ITMF_CLR_TASKSET,          /* Clear Task Set */
     329                 :            :         SNIC_ITMF_LUN_RESET,            /* Lun Reset */
     330                 :            :         SNIC_ITMF_ABTS_TASK_TERM,       /* Supported for SAN Targets */
     331                 :            : };
     332                 :            : 
     333                 :            : /*
     334                 :            :  * snic_itmf_cmpl: firmware -> host resposne
     335                 :            :  *
     336                 :            :  * used for sending the host a response for a itmf request
     337                 :            :  */
     338                 :            : struct snic_itmf_cmpl {
     339                 :            :         __le32  nterminated;    /* # IOs terminated as a result of tmf */
     340                 :            :         u8      flags;          /* flags */
     341                 :            :         u8      _resvd[3];
     342                 :            : };
     343                 :            : 
     344                 :            : /*
     345                 :            :  * itmfl_cmpl flags
     346                 :            :  * Bit 0 : 1 - Num terminated field valid
     347                 :            :  * Bit 1 - 7 : Reserved
     348                 :            :  */
     349                 :            : #define SNIC_NUM_TERM_VALID     0x01    /* Number of IOs terminated */
     350                 :            : 
     351                 :            : /*
     352                 :            :  * snic_hba_reset: host -> firmware request
     353                 :            :  *
     354                 :            :  * used for requesting firmware to reset snic
     355                 :            :  */
     356                 :            : struct snic_hba_reset {
     357                 :            :         __le16  flags;          /* flags */
     358                 :            :         u8      _resvd[6];
     359                 :            : };
     360                 :            : 
     361                 :            : /*
     362                 :            :  * snic_hba_reset_cmpl: firmware -> host response
     363                 :            :  *
     364                 :            :  * Used by firmware to respond to the host's hba reset request
     365                 :            :  */
     366                 :            : struct snic_hba_reset_cmpl {
     367                 :            :         u8      flags;          /* flags : more info needs to be added*/
     368                 :            :         u8      _resvd[7];
     369                 :            : };
     370                 :            : 
     371                 :            : /*
     372                 :            :  * snic_notify_msg: firmware -> host response
     373                 :            :  *
     374                 :            :  * Used by firmware to notify host of the last work queue entry received
     375                 :            :  */
     376                 :            : struct snic_notify_msg {
     377                 :            :         __le32  wqe_num;        /* wq entry number */
     378                 :            :         u8      flags;          /* flags, macros */
     379                 :            :         u8      _resvd[4];
     380                 :            : };
     381                 :            : 
     382                 :            : 
     383                 :            : #define SNIC_EVDATA_LEN         24      /* in bytes */
     384                 :            : /* snic_async_evnotify: firmware -> host notification
     385                 :            :  *
     386                 :            :  * Used by firmware to notify the host about configuration/state changes
     387                 :            :  */
     388                 :            : struct snic_async_evnotify {
     389                 :            :         u8      FLS_EVENT_DESC;
     390                 :            :         u8      vnic;                   /* vnic id */
     391                 :            :         u8      _resvd[2];
     392                 :            :         __le32  ev_id;                  /* Event ID */
     393                 :            :         u8      ev_data[SNIC_EVDATA_LEN]; /* Event Data */
     394                 :            :         u8      _resvd2[4];
     395                 :            : };
     396                 :            : 
     397                 :            : /* async event flags */
     398                 :            : enum snic_ev_type {
     399                 :            :         SNIC_EV_TGT_OFFLINE = 0x01, /* Target Offline, PL contains TGT ID */
     400                 :            :         SNIC_EV_TGT_ONLINE,     /* Target Online, PL contains TGT ID */
     401                 :            :         SNIC_EV_LUN_OFFLINE,    /* LUN Offline, PL contains LUN ID */
     402                 :            :         SNIC_EV_LUN_ONLINE,     /* LUN Online, PL contains LUN ID */
     403                 :            :         SNIC_EV_CONF_CHG,       /* Dev Config/Attr Change Event */
     404                 :            :         SNIC_EV_TGT_ADDED,      /* Target Added */
     405                 :            :         SNIC_EV_TGT_DELTD,      /* Target Del'd, PL contains TGT ID */
     406                 :            :         SNIC_EV_LUN_ADDED,      /* LUN Added */
     407                 :            :         SNIC_EV_LUN_DELTD,      /* LUN Del'd, PL cont. TGT & LUN ID */
     408                 :            : 
     409                 :            :         SNIC_EV_DISC_CMPL = 0x10, /* Discovery Completed Event */
     410                 :            : };
     411                 :            : 
     412                 :            : 
     413                 :            : #define SNIC_HOST_REQ_LEN       128     /*Exp length of host req, wq desc sz*/
     414                 :            : /* Payload 88 bytes = 128 - 24 - 16 */
     415                 :            : #define SNIC_HOST_REQ_PAYLOAD   ((int)(SNIC_HOST_REQ_LEN -              \
     416                 :            :                                         sizeof(struct snic_io_hdr) -    \
     417                 :            :                                         (2 * sizeof(u64)) - sizeof(ulong)))
     418                 :            : 
     419                 :            : /*
     420                 :            :  * snic_host_req: host -> firmware request
     421                 :            :  *
     422                 :            :  * Basic structure for all snic requests that are sent from the host to
     423                 :            :  * firmware. They are 128 bytes in size.
     424                 :            :  */
     425                 :            : struct snic_host_req {
     426                 :            :         u64     ctrl_data[2];   /*16 bytes - Control Data */
     427                 :            :         struct snic_io_hdr hdr;
     428                 :            :         union {
     429                 :            :                 /*
     430                 :            :                  * Entry specific space, last byte contains color
     431                 :            :                  */
     432                 :            :                 u8      buf[SNIC_HOST_REQ_PAYLOAD];
     433                 :            : 
     434                 :            :                 /*
     435                 :            :                  * Exchange firmware version
     436                 :            :                  */
     437                 :            :                 struct snic_exch_ver_req        exch_ver;
     438                 :            : 
     439                 :            :                 /* report targets */
     440                 :            :                 struct snic_report_tgts         rpt_tgts;
     441                 :            : 
     442                 :            :                 /* io request */
     443                 :            :                 struct snic_icmnd               icmnd;
     444                 :            : 
     445                 :            :                 /* task management request */
     446                 :            :                 struct snic_itmf                itmf;
     447                 :            : 
     448                 :            :                 /* hba reset */
     449                 :            :                 struct snic_hba_reset           reset;
     450                 :            :         } u;
     451                 :            : 
     452                 :            :         ulong req_pa;
     453                 :            : }; /* end of snic_host_req structure */
     454                 :            : 
     455                 :            : 
     456                 :            : #define SNIC_FW_REQ_LEN         64 /* Expected length of fw req */
     457                 :            : struct snic_fw_req {
     458                 :            :         struct snic_io_hdr hdr;
     459                 :            :         union {
     460                 :            :                 /*
     461                 :            :                  * Entry specific space, last byte contains color
     462                 :            :                  */
     463                 :            :                 u8      buf[SNIC_FW_REQ_LEN - sizeof(struct snic_io_hdr)];
     464                 :            : 
     465                 :            :                 /* Exchange Version Response */
     466                 :            :                 struct snic_exch_ver_rsp        exch_ver_cmpl;
     467                 :            : 
     468                 :            :                 /* Report Targets Response */
     469                 :            :                 struct snic_report_tgts_cmpl    rpt_tgts_cmpl;
     470                 :            : 
     471                 :            :                 /* scsi response */
     472                 :            :                 struct snic_icmnd_cmpl          icmnd_cmpl;
     473                 :            : 
     474                 :            :                 /* task management response */
     475                 :            :                 struct snic_itmf_cmpl           itmf_cmpl;
     476                 :            : 
     477                 :            :                 /* hba reset response */
     478                 :            :                 struct snic_hba_reset_cmpl      reset_cmpl;
     479                 :            : 
     480                 :            :                 /* notify message */
     481                 :            :                 struct snic_notify_msg          ack;
     482                 :            : 
     483                 :            :                 /* async notification event */
     484                 :            :                 struct snic_async_evnotify      async_ev;
     485                 :            : 
     486                 :            :         } u;
     487                 :            : }; /* end of snic_fw_req structure */
     488                 :            : 
     489                 :            : /*
     490                 :            :  * Auxillary macro to verify specific snic req/cmpl structures
     491                 :            :  * to ensure that it will be aligned to 64 bit, and not using
     492                 :            :  * color bit field
     493                 :            :  */
     494                 :            : #define VERIFY_REQ_SZ(x)
     495                 :            : #define VERIFY_CMPL_SZ(x)
     496                 :            : 
     497                 :            : /*
     498                 :            :  * Access routines to encode and decode the color bit, which is the most
     499                 :            :  * significant bit of the structure.
     500                 :            :  */
     501                 :            : static inline void
     502                 :            : snic_color_enc(struct snic_fw_req *req, u8 color)
     503                 :            : {
     504                 :            :         u8 *c = ((u8 *) req) + sizeof(struct snic_fw_req) - 1;
     505                 :            : 
     506                 :            :         if (color)
     507                 :            :                 *c |= 0x80;
     508                 :            :         else
     509                 :            :                 *c &= ~0x80;
     510                 :            : }
     511                 :            : 
     512                 :            : static inline void
     513                 :          0 : snic_color_dec(struct snic_fw_req *req, u8 *color)
     514                 :            : {
     515                 :          0 :         u8 *c = ((u8 *) req) + sizeof(struct snic_fw_req) - 1;
     516                 :            : 
     517                 :          0 :         *color = *c >> 7;
     518                 :            : 
     519                 :            :         /* Make sure color bit is read from desc *before* other fields
     520                 :            :          * are read from desc. Hardware guarantees color bit is last
     521                 :            :          * bit (byte) written. Adding the rmb() prevents the compiler
     522                 :            :          * and/or CPU from reordering the reads which would potentially
     523                 :            :          * result in reading stale values.
     524                 :            :          */
     525                 :          0 :         rmb();
     526                 :          0 : }
     527                 :            : #endif /* end of __SNIC_FWINT_H */

Generated by: LCOV version 1.14