194 lines
7.0 KiB
C
194 lines
7.0 KiB
C
/*
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* CXL Flash Device Driver
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*
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* Written by: Manoj N. Kumar <manoj@linux.vnet.ibm.com>, IBM Corporation
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* Matthew R. Ochs <mrochs@linux.vnet.ibm.com>, IBM Corporation
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*
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* Copyright (C) 2015 IBM Corporation
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _CXLFLASH_IOCTL_H
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#define _CXLFLASH_IOCTL_H
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#include <linux/types.h>
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/*
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* Structure and flag definitions CXL Flash superpipe ioctls
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*/
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#define DK_CXLFLASH_VERSION_0 0
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struct dk_cxlflash_hdr {
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__u16 version; /* Version data */
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__u16 rsvd[3]; /* Reserved for future use */
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__u64 flags; /* Input flags */
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__u64 return_flags; /* Returned flags */
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};
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/*
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* Return flag definitions available to all ioctls
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*
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* Similar to the input flags, these are grown from the bottom-up with the
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* intention that ioctl-specific return flag definitions would grow from the
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* top-down, allowing the two sets to co-exist. While not required/enforced
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* at this time, this provides future flexibility.
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*/
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#define DK_CXLFLASH_ALL_PORTS_ACTIVE 0x0000000000000001ULL
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#define DK_CXLFLASH_APP_CLOSE_ADAP_FD 0x0000000000000002ULL
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/*
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* General Notes:
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* -------------
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* The 'context_id' field of all ioctl structures contains the context
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* identifier for a context in the lower 32-bits (upper 32-bits are not
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* to be used when identifying a context to the AFU). That said, the value
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* in its entirety (all 64-bits) is to be treated as an opaque cookie and
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* should be presented as such when issuing ioctls.
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*/
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/*
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* DK_CXLFLASH_ATTACH Notes:
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* ------------------------
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* Read/write access permissions are specified via the O_RDONLY, O_WRONLY,
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* and O_RDWR flags defined in the fcntl.h header file.
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*
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* A valid adapter file descriptor (fd >= 0) is only returned on the initial
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* attach (successful) of a context. When a context is shared(reused), the user
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* is expected to already 'know' the adapter file descriptor associated with the
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* context.
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*/
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#define DK_CXLFLASH_ATTACH_REUSE_CONTEXT 0x8000000000000000ULL
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struct dk_cxlflash_attach {
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struct dk_cxlflash_hdr hdr; /* Common fields */
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__u64 num_interrupts; /* Requested number of interrupts */
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__u64 context_id; /* Returned context */
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__u64 mmio_size; /* Returned size of MMIO area */
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__u64 block_size; /* Returned block size, in bytes */
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__u64 adap_fd; /* Returned adapter file descriptor */
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__u64 last_lba; /* Returned last LBA on the device */
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__u64 max_xfer; /* Returned max transfer size, blocks */
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__u64 reserved[8]; /* Reserved for future use */
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};
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struct dk_cxlflash_detach {
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struct dk_cxlflash_hdr hdr; /* Common fields */
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__u64 context_id; /* Context to detach */
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__u64 reserved[8]; /* Reserved for future use */
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};
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struct dk_cxlflash_udirect {
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struct dk_cxlflash_hdr hdr; /* Common fields */
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__u64 context_id; /* Context to own physical resources */
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__u64 rsrc_handle; /* Returned resource handle */
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__u64 last_lba; /* Returned last LBA on the device */
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__u64 reserved[8]; /* Reserved for future use */
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};
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#define DK_CXLFLASH_UVIRTUAL_NEED_WRITE_SAME 0x8000000000000000ULL
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struct dk_cxlflash_uvirtual {
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struct dk_cxlflash_hdr hdr; /* Common fields */
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__u64 context_id; /* Context to own virtual resources */
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__u64 lun_size; /* Requested size, in 4K blocks */
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__u64 rsrc_handle; /* Returned resource handle */
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__u64 last_lba; /* Returned last LBA of LUN */
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__u64 reserved[8]; /* Reserved for future use */
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};
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struct dk_cxlflash_release {
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struct dk_cxlflash_hdr hdr; /* Common fields */
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__u64 context_id; /* Context owning resources */
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__u64 rsrc_handle; /* Resource handle to release */
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__u64 reserved[8]; /* Reserved for future use */
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};
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struct dk_cxlflash_resize {
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struct dk_cxlflash_hdr hdr; /* Common fields */
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__u64 context_id; /* Context owning resources */
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__u64 rsrc_handle; /* Resource handle of LUN to resize */
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__u64 req_size; /* New requested size, in 4K blocks */
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__u64 last_lba; /* Returned last LBA of LUN */
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__u64 reserved[8]; /* Reserved for future use */
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};
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struct dk_cxlflash_clone {
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struct dk_cxlflash_hdr hdr; /* Common fields */
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__u64 context_id_src; /* Context to clone from */
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__u64 context_id_dst; /* Context to clone to */
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__u64 adap_fd_src; /* Source context adapter fd */
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__u64 reserved[8]; /* Reserved for future use */
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};
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#define DK_CXLFLASH_VERIFY_SENSE_LEN 18
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#define DK_CXLFLASH_VERIFY_HINT_SENSE 0x8000000000000000ULL
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struct dk_cxlflash_verify {
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struct dk_cxlflash_hdr hdr; /* Common fields */
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__u64 context_id; /* Context owning resources to verify */
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__u64 rsrc_handle; /* Resource handle of LUN */
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__u64 hint; /* Reasons for verify */
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__u64 last_lba; /* Returned last LBA of device */
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__u8 sense_data[DK_CXLFLASH_VERIFY_SENSE_LEN]; /* SCSI sense data */
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__u8 pad[6]; /* Pad to next 8-byte boundary */
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__u64 reserved[8]; /* Reserved for future use */
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};
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#define DK_CXLFLASH_RECOVER_AFU_CONTEXT_RESET 0x8000000000000000ULL
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struct dk_cxlflash_recover_afu {
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struct dk_cxlflash_hdr hdr; /* Common fields */
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__u64 reason; /* Reason for recovery request */
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__u64 context_id; /* Context to recover / updated ID */
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__u64 mmio_size; /* Returned size of MMIO area */
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__u64 adap_fd; /* Returned adapter file descriptor */
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__u64 reserved[8]; /* Reserved for future use */
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};
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#define DK_CXLFLASH_MANAGE_LUN_WWID_LEN 16
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#define DK_CXLFLASH_MANAGE_LUN_ENABLE_SUPERPIPE 0x8000000000000000ULL
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#define DK_CXLFLASH_MANAGE_LUN_DISABLE_SUPERPIPE 0x4000000000000000ULL
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#define DK_CXLFLASH_MANAGE_LUN_ALL_PORTS_ACCESSIBLE 0x2000000000000000ULL
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struct dk_cxlflash_manage_lun {
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struct dk_cxlflash_hdr hdr; /* Common fields */
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__u8 wwid[DK_CXLFLASH_MANAGE_LUN_WWID_LEN]; /* Page83 WWID, NAA-6 */
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__u64 reserved[8]; /* Rsvd, future use */
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};
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union cxlflash_ioctls {
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struct dk_cxlflash_attach attach;
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struct dk_cxlflash_detach detach;
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struct dk_cxlflash_udirect udirect;
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struct dk_cxlflash_uvirtual uvirtual;
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struct dk_cxlflash_release release;
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struct dk_cxlflash_resize resize;
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struct dk_cxlflash_clone clone;
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struct dk_cxlflash_verify verify;
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struct dk_cxlflash_recover_afu recover_afu;
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struct dk_cxlflash_manage_lun manage_lun;
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};
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#define MAX_CXLFLASH_IOCTL_SZ (sizeof(union cxlflash_ioctls))
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#define CXL_MAGIC 0xCA
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#define CXL_IOWR(_n, _s) _IOWR(CXL_MAGIC, _n, struct _s)
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#define DK_CXLFLASH_ATTACH CXL_IOWR(0x80, dk_cxlflash_attach)
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#define DK_CXLFLASH_USER_DIRECT CXL_IOWR(0x81, dk_cxlflash_udirect)
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#define DK_CXLFLASH_RELEASE CXL_IOWR(0x82, dk_cxlflash_release)
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#define DK_CXLFLASH_DETACH CXL_IOWR(0x83, dk_cxlflash_detach)
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#define DK_CXLFLASH_VERIFY CXL_IOWR(0x84, dk_cxlflash_verify)
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#define DK_CXLFLASH_RECOVER_AFU CXL_IOWR(0x85, dk_cxlflash_recover_afu)
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#define DK_CXLFLASH_MANAGE_LUN CXL_IOWR(0x86, dk_cxlflash_manage_lun)
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#define DK_CXLFLASH_USER_VIRTUAL CXL_IOWR(0x87, dk_cxlflash_uvirtual)
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#define DK_CXLFLASH_VLUN_RESIZE CXL_IOWR(0x88, dk_cxlflash_resize)
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#define DK_CXLFLASH_VLUN_CLONE CXL_IOWR(0x89, dk_cxlflash_clone)
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#endif /* ifndef _CXLFLASH_IOCTL_H */
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