152 lines
4.6 KiB
C
152 lines
4.6 KiB
C
/*
|
|
* 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
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#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 */
|
|
|
|
#define CHAN2PORT(_x) ((_x) + 1)
|
|
#define PORT2CHAN(_x) ((_x) - 1)
|
|
|
|
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[CXLFLASH_NUM_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 */
|
|
|
|
struct cxl_ioctl_start_work work;
|
|
u64 ctxid;
|
|
int lfd;
|
|
pid_t pid;
|
|
bool unavail;
|
|
bool err_recovery_active;
|
|
struct mutex mutex; /* Context protection */
|
|
struct cxl_context *ctx;
|
|
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 *, struct dk_cxlflash_resize *);
|
|
int _cxlflash_vlun_resize(struct scsi_device *, struct ctx_info *,
|
|
struct dk_cxlflash_resize *);
|
|
|
|
int cxlflash_disk_release(struct scsi_device *, struct dk_cxlflash_release *);
|
|
int _cxlflash_disk_release(struct scsi_device *, struct ctx_info *,
|
|
struct dk_cxlflash_release *);
|
|
|
|
int cxlflash_disk_clone(struct scsi_device *, struct dk_cxlflash_clone *);
|
|
|
|
int cxlflash_disk_virtual_open(struct scsi_device *, void *);
|
|
|
|
int cxlflash_lun_attach(struct glun_info *, enum lun_mode, bool);
|
|
void cxlflash_lun_detach(struct glun_info *);
|
|
|
|
struct ctx_info *get_context(struct cxlflash_cfg *, u64, void *, enum ctx_ctrl);
|
|
void put_context(struct ctx_info *);
|
|
|
|
struct sisl_rht_entry *get_rhte(struct ctx_info *, res_hndl_t,
|
|
struct llun_info *);
|
|
|
|
struct sisl_rht_entry *rhte_checkout(struct ctx_info *, struct llun_info *);
|
|
void rhte_checkin(struct ctx_info *, struct sisl_rht_entry *);
|
|
|
|
void cxlflash_ba_terminate(struct ba_lun *);
|
|
|
|
int cxlflash_manage_lun(struct scsi_device *, struct dk_cxlflash_manage_lun *);
|
|
|
|
int check_state(struct cxlflash_cfg *);
|
|
|
|
#endif /* ifndef _CXLFLASH_SUPERPIPE_H */
|