drivers/scsi/cxlflash/main.h

   1 /*
   2  * CXL Flash Device Driver
   3  *
   4  * Written by: Manoj N. Kumar <manoj@linux.vnet.ibm.com>, IBM Corporation
   5  *             Matthew R. Ochs <mrochs@linux.vnet.ibm.com>, IBM Corporation
   6  *
   7  * Copyright (C) 2015 IBM Corporation
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License
  11  * as published by the Free Software Foundation; either version
  12  * 2 of the License, or (at your option) any later version.
  13  */
  14
  15 #ifndef _CXLFLASH_MAIN_H
  16 #define _CXLFLASH_MAIN_H
  17
  18 #include <linux/list.h>
  19 #include <linux/types.h>
  20 #include <scsi/scsi.h>
  21 #include <scsi/scsi_device.h>
  22
  23 #include "backend.h"
  24
  25 #define CXLFLASH_NAME           "cxlflash"
  26 #define CXLFLASH_ADAPTER_NAME   "IBM POWER CXL Flash Adapter"
  27 #define CXLFLASH_MAX_ADAPTERS   32
  28
  29 #define PCI_DEVICE_ID_IBM_CORSA         0x04F0
  30 #define PCI_DEVICE_ID_IBM_FLASH_GT      0x0600
  31 #define PCI_DEVICE_ID_IBM_BRIARD        0x0624
  32
  33 /* Since there is only one target, make it 0 */
  34 #define CXLFLASH_TARGET         0
  35 #define CXLFLASH_MAX_CDB_LEN    16
  36
  37 /* Really only one target per bus since the Texan is directly attached */
  38 #define CXLFLASH_MAX_NUM_TARGETS_PER_BUS        1
  39 #define CXLFLASH_MAX_NUM_LUNS_PER_TARGET        65536
  40
  41 #define CXLFLASH_PCI_ERROR_RECOVERY_TIMEOUT     (120 * HZ)
  42
  43 /* FC defines */
  44 #define FC_MTIP_CMDCONFIG 0x010
  45 #define FC_MTIP_STATUS 0x018
  46 #define FC_MAX_NUM_LUNS 0x080 /* Max LUNs host can provision for port */
  47 #define FC_CUR_NUM_LUNS 0x088 /* Cur number LUNs provisioned for port */
  48 #define FC_MAX_CAP_PORT 0x090 /* Max capacity all LUNs for port (4K blocks) */
  49 #define FC_CUR_CAP_PORT 0x098 /* Cur capacity all LUNs for port (4K blocks) */
  50
  51 #define FC_PNAME 0x300
  52 #define FC_CONFIG 0x320
  53 #define FC_CONFIG2 0x328
  54 #define FC_STATUS 0x330
  55 #define FC_ERROR 0x380
  56 #define FC_ERRCAP 0x388
  57 #define FC_ERRMSK 0x390
  58 #define FC_CNT_CRCERR 0x538
  59 #define FC_CRC_THRESH 0x580
  60
  61 #define FC_MTIP_CMDCONFIG_ONLINE        0x20ULL
  62 #define FC_MTIP_CMDCONFIG_OFFLINE       0x40ULL
  63
  64 #define FC_MTIP_STATUS_MASK             0x30ULL
  65 #define FC_MTIP_STATUS_ONLINE           0x20ULL
  66 #define FC_MTIP_STATUS_OFFLINE          0x10ULL
  67
  68 /* TIMEOUT and RETRY definitions */
  69
  70 /* AFU command timeout values */
  71 #define MC_AFU_SYNC_TIMEOUT     5       /* 5 secs */
  72 #define MC_LUN_PROV_TIMEOUT     5       /* 5 secs */
  73 #define MC_AFU_DEBUG_TIMEOUT    5       /* 5 secs */
  74
  75 /* AFU command room retry limit */
  76 #define MC_ROOM_RETRY_CNT       10
  77
  78 /* FC CRC clear periodic timer */
  79 #define MC_CRC_THRESH 100       /* threshold in 5 mins */
  80
  81 #define FC_PORT_STATUS_RETRY_CNT 100    /* 100 100ms retries = 10 seconds */
  82 #define FC_PORT_STATUS_RETRY_INTERVAL_US 100000 /* microseconds */
  83
  84 /* VPD defines */
  85 #define CXLFLASH_VPD_LEN        256
  86 #define WWPN_LEN        16
  87 #define WWPN_BUF_LEN    (WWPN_LEN + 1)
  88
  89 enum undo_level {
  90         UNDO_NOOP = 0,
  91         FREE_IRQ,
  92         UNMAP_ONE,
  93         UNMAP_TWO,
  94         UNMAP_THREE
  95 };
  96
  97 struct dev_dependent_vals {
  98         u64 max_sectors;
  99         u64 flags;
 100 #define CXLFLASH_NOTIFY_SHUTDOWN        0x0000000000000001ULL
 101 #define CXLFLASH_WWPN_VPD_REQUIRED      0x0000000000000002ULL
 102 #define CXLFLASH_OCXL_DEV               0x0000000000000004ULL
 103 };
 104
 105 static inline const struct cxlflash_backend_ops *
 106 cxlflash_assign_ops(struct dev_dependent_vals *ddv)
 107 {
 108         const struct cxlflash_backend_ops *ops = NULL;
 109
 110 #ifdef CONFIG_OCXL_BASE
 111         if (ddv->flags & CXLFLASH_OCXL_DEV)
 112                 ops = &cxlflash_ocxl_ops;
 113 #endif
 114
 115 #ifdef CONFIG_CXL_BASE
 116         if (!(ddv->flags & CXLFLASH_OCXL_DEV))
 117                 ops = &cxlflash_cxl_ops;
 118 #endif
 119
 120         return ops;
 121 }
 122
 123 struct asyc_intr_info {
 124         u64 status;
 125         char *desc;
 126         u8 port;
 127         u8 action;
 128 #define CLR_FC_ERROR    0x01
 129 #define LINK_RESET      0x02
 130 #define SCAN_HOST       0x04
 131 };
 132
 133 #endif /* _CXLFLASH_MAIN_H */