include/uapi/scsi/cxlflash_ioctl.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_IOCTL_H
  16 #define _CXLFLASH_IOCTL_H
  17
  18 #include <linux/types.h>
  19
  20 /*
  21  * Structure and flag definitions CXL Flash superpipe ioctls
  22  */
  23
  24 #define DK_CXLFLASH_VERSION_0   0
  25
  26 struct dk_cxlflash_hdr {
  27         __u16 version;                  /* Version data */
  28         __u16 rsvd[3];                  /* Reserved for future use */
  29         __u64 flags;                    /* Input flags */
  30         __u64 return_flags;             /* Returned flags */
  31 };
  32
  33 /*
  34  * Return flag definitions available to all ioctls
  35  *
  36  * Similar to the input flags, these are grown from the bottom-up with the
  37  * intention that ioctl-specific return flag definitions would grow from the
  38  * top-down, allowing the two sets to co-exist. While not required/enforced
  39  * at this time, this provides future flexibility.
  40  */
  41 #define DK_CXLFLASH_ALL_PORTS_ACTIVE    0x0000000000000001ULL
  42 #define DK_CXLFLASH_APP_CLOSE_ADAP_FD   0x0000000000000002ULL
  43 #define DK_CXLFLASH_CONTEXT_SQ_CMD_MODE 0x0000000000000004ULL
  44
  45 /*
  46  * General Notes:
  47  * -------------
  48  * The 'context_id' field of all ioctl structures contains the context
  49  * identifier for a context in the lower 32-bits (upper 32-bits are not
  50  * to be used when identifying a context to the AFU). That said, the value
  51  * in its entirety (all 64-bits) is to be treated as an opaque cookie and
  52  * should be presented as such when issuing ioctls.
  53  */
  54
  55 /*
  56  * DK_CXLFLASH_ATTACH Notes:
  57  * ------------------------
  58  * Read/write access permissions are specified via the O_RDONLY, O_WRONLY,
  59  * and O_RDWR flags defined in the fcntl.h header file.
  60  *
  61  * A valid adapter file descriptor (fd >= 0) is only returned on the initial
  62  * attach (successful) of a context. When a context is shared(reused), the user
  63  * is expected to already 'know' the adapter file descriptor associated with the
  64  * context.
  65  */
  66 #define DK_CXLFLASH_ATTACH_REUSE_CONTEXT        0x8000000000000000ULL
  67
  68 struct dk_cxlflash_attach {
  69         struct dk_cxlflash_hdr hdr;     /* Common fields */
  70         __u64 num_interrupts;           /* Requested number of interrupts */
  71         __u64 context_id;               /* Returned context */
  72         __u64 mmio_size;                /* Returned size of MMIO area */
  73         __u64 block_size;               /* Returned block size, in bytes */
  74         __u64 adap_fd;                  /* Returned adapter file descriptor */
  75         __u64 last_lba;                 /* Returned last LBA on the device */
  76         __u64 max_xfer;                 /* Returned max transfer size, blocks */
  77         __u64 reserved[8];              /* Reserved for future use */
  78 };
  79
  80 struct dk_cxlflash_detach {
  81         struct dk_cxlflash_hdr hdr;     /* Common fields */
  82         __u64 context_id;               /* Context to detach */
  83         __u64 reserved[8];              /* Reserved for future use */
  84 };
  85
  86 struct dk_cxlflash_udirect {
  87         struct dk_cxlflash_hdr hdr;     /* Common fields */
  88         __u64 context_id;               /* Context to own physical resources */
  89         __u64 rsrc_handle;              /* Returned resource handle */
  90         __u64 last_lba;                 /* Returned last LBA on the device */
  91         __u64 reserved[8];              /* Reserved for future use */
  92 };
  93
  94 #define DK_CXLFLASH_UVIRTUAL_NEED_WRITE_SAME    0x8000000000000000ULL
  95
  96 struct dk_cxlflash_uvirtual {
  97         struct dk_cxlflash_hdr hdr;     /* Common fields */
  98         __u64 context_id;               /* Context to own virtual resources */
  99         __u64 lun_size;                 /* Requested size, in 4K blocks */
 100         __u64 rsrc_handle;              /* Returned resource handle */
 101         __u64 last_lba;                 /* Returned last LBA of LUN */
 102         __u64 reserved[8];              /* Reserved for future use */
 103 };
 104
 105 struct dk_cxlflash_release {
 106         struct dk_cxlflash_hdr hdr;     /* Common fields */
 107         __u64 context_id;               /* Context owning resources */
 108         __u64 rsrc_handle;              /* Resource handle to release */
 109         __u64 reserved[8];              /* Reserved for future use */
 110 };
 111
 112 struct dk_cxlflash_resize {
 113         struct dk_cxlflash_hdr hdr;     /* Common fields */
 114         __u64 context_id;               /* Context owning resources */
 115         __u64 rsrc_handle;              /* Resource handle of LUN to resize */
 116         __u64 req_size;                 /* New requested size, in 4K blocks */
 117         __u64 last_lba;                 /* Returned last LBA of LUN */
 118         __u64 reserved[8];              /* Reserved for future use */
 119 };
 120
 121 struct dk_cxlflash_clone {
 122         struct dk_cxlflash_hdr hdr;     /* Common fields */
 123         __u64 context_id_src;           /* Context to clone from */
 124         __u64 context_id_dst;           /* Context to clone to */
 125         __u64 adap_fd_src;              /* Source context adapter fd */
 126         __u64 reserved[8];              /* Reserved for future use */
 127 };
 128
 129 #define DK_CXLFLASH_VERIFY_SENSE_LEN    18
 130 #define DK_CXLFLASH_VERIFY_HINT_SENSE   0x8000000000000000ULL
 131
 132 struct dk_cxlflash_verify {
 133         struct dk_cxlflash_hdr hdr;     /* Common fields */
 134         __u64 context_id;               /* Context owning resources to verify */
 135         __u64 rsrc_handle;              /* Resource handle of LUN */
 136         __u64 hint;                     /* Reasons for verify */
 137         __u64 last_lba;                 /* Returned last LBA of device */
 138         __u8 sense_data[DK_CXLFLASH_VERIFY_SENSE_LEN]; /* SCSI sense data */
 139         __u8 pad[6];                    /* Pad to next 8-byte boundary */
 140         __u64 reserved[8];              /* Reserved for future use */
 141 };
 142
 143 #define DK_CXLFLASH_RECOVER_AFU_CONTEXT_RESET   0x8000000000000000ULL
 144
 145 struct dk_cxlflash_recover_afu {
 146         struct dk_cxlflash_hdr hdr;     /* Common fields */
 147         __u64 reason;                   /* Reason for recovery request */
 148         __u64 context_id;               /* Context to recover / updated ID */
 149         __u64 mmio_size;                /* Returned size of MMIO area */
 150         __u64 adap_fd;                  /* Returned adapter file descriptor */
 151         __u64 reserved[8];              /* Reserved for future use */
 152 };
 153
 154 #define DK_CXLFLASH_MANAGE_LUN_WWID_LEN                 16
 155 #define DK_CXLFLASH_MANAGE_LUN_ENABLE_SUPERPIPE         0x8000000000000000ULL
 156 #define DK_CXLFLASH_MANAGE_LUN_DISABLE_SUPERPIPE        0x4000000000000000ULL
 157 #define DK_CXLFLASH_MANAGE_LUN_ALL_PORTS_ACCESSIBLE     0x2000000000000000ULL
 158
 159 struct dk_cxlflash_manage_lun {
 160         struct dk_cxlflash_hdr hdr;                     /* Common fields */
 161         __u8 wwid[DK_CXLFLASH_MANAGE_LUN_WWID_LEN];     /* Page83 WWID, NAA-6 */
 162         __u64 reserved[8];                              /* Rsvd, future use */
 163 };
 164
 165 union cxlflash_ioctls {
 166         struct dk_cxlflash_attach attach;
 167         struct dk_cxlflash_detach detach;
 168         struct dk_cxlflash_udirect udirect;
 169         struct dk_cxlflash_uvirtual uvirtual;
 170         struct dk_cxlflash_release release;
 171         struct dk_cxlflash_resize resize;
 172         struct dk_cxlflash_clone clone;
 173         struct dk_cxlflash_verify verify;
 174         struct dk_cxlflash_recover_afu recover_afu;
 175         struct dk_cxlflash_manage_lun manage_lun;
 176 };
 177
 178 #define MAX_CXLFLASH_IOCTL_SZ   (sizeof(union cxlflash_ioctls))
 179
 180 #define CXL_MAGIC 0xCA
 181 #define CXL_IOWR(_n, _s)        _IOWR(CXL_MAGIC, _n, struct _s)
 182
 183 #define DK_CXLFLASH_ATTACH              CXL_IOWR(0x80, dk_cxlflash_attach)
 184 #define DK_CXLFLASH_USER_DIRECT         CXL_IOWR(0x81, dk_cxlflash_udirect)
 185 #define DK_CXLFLASH_RELEASE             CXL_IOWR(0x82, dk_cxlflash_release)
 186 #define DK_CXLFLASH_DETACH              CXL_IOWR(0x83, dk_cxlflash_detach)
 187 #define DK_CXLFLASH_VERIFY              CXL_IOWR(0x84, dk_cxlflash_verify)
 188 #define DK_CXLFLASH_RECOVER_AFU         CXL_IOWR(0x85, dk_cxlflash_recover_afu)
 189 #define DK_CXLFLASH_MANAGE_LUN          CXL_IOWR(0x86, dk_cxlflash_manage_lun)
 190 #define DK_CXLFLASH_USER_VIRTUAL        CXL_IOWR(0x87, dk_cxlflash_uvirtual)
 191 #define DK_CXLFLASH_VLUN_RESIZE         CXL_IOWR(0x88, dk_cxlflash_resize)
 192 #define DK_CXLFLASH_VLUN_CLONE          CXL_IOWR(0x89, dk_cxlflash_clone)
 193
 194 #endif /* ifndef _CXLFLASH_IOCTL_H */