linux/drivers/scsi/cxlflash/superpipe.h
Thomas Gleixner 2874c5fd28 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 3029 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:32 -07:00

154 lines
4.5 KiB
C

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* CXL Flash Device Driver
*
* Written by: Manoj N. Kumar <manoj@linux.vnet.ibm.com>, IBM Corporation
* Matthew R. Ochs <mrochs@linux.vnet.ibm.com>, IBM Corporation
*
* Copyright (C) 2015 IBM Corporation
*/
#ifndef _CXLFLASH_SUPERPIPE_H
#define _CXLFLASH_SUPERPIPE_H
extern struct cxlflash_global global;
/*
* Terminology: use afu (and not adapter) to refer to the HW.
* Adapter is the entire slot and includes PSL out of which
* only the AFU is visible to user space.
*/
/* Chunk size parms: note sislite minimum chunk size is
* 0x10000 LBAs corresponding to a NMASK or 16.
*/
#define MC_CHUNK_SIZE (1 << MC_RHT_NMASK) /* in LBAs */
#define CMD_TIMEOUT 30 /* 30 secs */
#define CMD_RETRIES 5 /* 5 retries for scsi_execute */
#define MAX_SECTOR_UNIT 512 /* max_sector is in 512 byte multiples */
enum lun_mode {
MODE_NONE = 0,
MODE_VIRTUAL,
MODE_PHYSICAL
};
/* Global (entire driver, spans adapters) lun_info structure */
struct glun_info {
u64 max_lba; /* from read cap(16) */
u32 blk_len; /* from read cap(16) */
enum lun_mode mode; /* NONE, VIRTUAL, PHYSICAL */
int users; /* Number of users w/ references to LUN */
u8 wwid[16];
struct mutex mutex;
struct blka blka;
struct list_head list;
};
/* Local (per-adapter) lun_info structure */
struct llun_info {
u64 lun_id[MAX_FC_PORTS]; /* from REPORT_LUNS */
u32 lun_index; /* Index in the LUN table */
u32 host_no; /* host_no from Scsi_host */
u32 port_sel; /* What port to use for this LUN */
bool in_table; /* Whether a LUN table entry was created */
u8 wwid[16]; /* Keep a duplicate copy here? */
struct glun_info *parent; /* Pointer to entry in global LUN structure */
struct scsi_device *sdev;
struct list_head list;
};
struct lun_access {
struct llun_info *lli;
struct scsi_device *sdev;
struct list_head list;
};
enum ctx_ctrl {
CTX_CTRL_CLONE = (1 << 1),
CTX_CTRL_ERR = (1 << 2),
CTX_CTRL_ERR_FALLBACK = (1 << 3),
CTX_CTRL_NOPID = (1 << 4),
CTX_CTRL_FILE = (1 << 5)
};
#define ENCODE_CTXID(_ctx, _id) (((((u64)_ctx) & 0xFFFFFFFF0ULL) << 28) | _id)
#define DECODE_CTXID(_val) (_val & 0xFFFFFFFF)
struct ctx_info {
struct sisl_ctrl_map __iomem *ctrl_map; /* initialized at startup */
struct sisl_rht_entry *rht_start; /* 1 page (req'd for alignment),
* alloc/free on attach/detach
*/
u32 rht_out; /* Number of checked out RHT entries */
u32 rht_perms; /* User-defined permissions for RHT entries */
struct llun_info **rht_lun; /* Mapping of RHT entries to LUNs */
u8 *rht_needs_ws; /* User-desired write-same function per RHTE */
u64 ctxid;
u64 irqs; /* Number of interrupts requested for context */
pid_t pid;
bool initialized;
bool unavail;
bool err_recovery_active;
struct mutex mutex; /* Context protection */
struct kref kref;
void *ctx;
struct cxlflash_cfg *cfg;
struct list_head luns; /* LUNs attached to this context */
const struct vm_operations_struct *cxl_mmap_vmops;
struct file *file;
struct list_head list; /* Link contexts in error recovery */
};
struct cxlflash_global {
struct mutex mutex;
struct list_head gluns;/* list of glun_info structs */
struct page *err_page; /* One page of all 0xF for error notification */
};
int cxlflash_vlun_resize(struct scsi_device *sdev,
struct dk_cxlflash_resize *resize);
int _cxlflash_vlun_resize(struct scsi_device *sdev, struct ctx_info *ctxi,
struct dk_cxlflash_resize *resize);
int cxlflash_disk_release(struct scsi_device *sdev,
struct dk_cxlflash_release *release);
int _cxlflash_disk_release(struct scsi_device *sdev, struct ctx_info *ctxi,
struct dk_cxlflash_release *release);
int cxlflash_disk_clone(struct scsi_device *sdev,
struct dk_cxlflash_clone *clone);
int cxlflash_disk_virtual_open(struct scsi_device *sdev, void *arg);
int cxlflash_lun_attach(struct glun_info *gli, enum lun_mode mode, bool locked);
void cxlflash_lun_detach(struct glun_info *gli);
struct ctx_info *get_context(struct cxlflash_cfg *cfg, u64 rctxit, void *arg,
enum ctx_ctrl ctrl);
void put_context(struct ctx_info *ctxi);
struct sisl_rht_entry *get_rhte(struct ctx_info *ctxi, res_hndl_t rhndl,
struct llun_info *lli);
struct sisl_rht_entry *rhte_checkout(struct ctx_info *ctxi,
struct llun_info *lli);
void rhte_checkin(struct ctx_info *ctxi, struct sisl_rht_entry *rhte);
void cxlflash_ba_terminate(struct ba_lun *ba_lun);
int cxlflash_manage_lun(struct scsi_device *sdev,
struct dk_cxlflash_manage_lun *manage);
int check_state(struct cxlflash_cfg *cfg);
#endif /* ifndef _CXLFLASH_SUPERPIPE_H */