cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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bfad_im.h (6628B)


      1/* SPDX-License-Identifier: GPL-2.0-only */
      2/*
      3 * Copyright (c) 2005-2014 Brocade Communications Systems, Inc.
      4 * Copyright (c) 2014- QLogic Corporation.
      5 * All rights reserved
      6 * www.qlogic.com
      7 *
      8 * Linux driver for QLogic BR-series Fibre Channel Host Bus Adapter.
      9 */
     10
     11#ifndef __BFAD_IM_H__
     12#define __BFAD_IM_H__
     13
     14#include "bfa_fcs.h"
     15
     16#define FCPI_NAME " fcpim"
     17
     18#ifndef KOBJ_NAME_LEN
     19#define KOBJ_NAME_LEN           20
     20#endif
     21
     22bfa_status_t bfad_im_module_init(void);
     23void bfad_im_module_exit(void);
     24bfa_status_t bfad_im_probe(struct bfad_s *bfad);
     25void bfad_im_probe_undo(struct bfad_s *bfad);
     26bfa_status_t bfad_im_port_new(struct bfad_s *bfad, struct bfad_port_s *port);
     27void bfad_im_port_delete(struct bfad_s *bfad, struct bfad_port_s *port);
     28void bfad_im_port_clean(struct bfad_im_port_s *im_port);
     29int  bfad_im_scsi_host_alloc(struct bfad_s *bfad,
     30		struct bfad_im_port_s *im_port, struct device *dev);
     31void bfad_im_scsi_host_free(struct bfad_s *bfad,
     32				struct bfad_im_port_s *im_port);
     33u32 bfad_im_supported_speeds(struct bfa_s *bfa);
     34
     35#define MAX_FCP_TARGET 1024
     36#define MAX_FCP_LUN 16384
     37#define BFAD_TARGET_RESET_TMO 60
     38#define BFAD_LUN_RESET_TMO 60
     39#define BFA_QUEUE_FULL_RAMP_UP_TIME 120
     40
     41/*
     42 * itnim flags
     43 */
     44#define IO_DONE_BIT			0
     45
     46/**
     47 * struct bfad_cmd_priv - private data per SCSI command.
     48 * @status: Lowest bit represents IO_DONE. The next seven bits hold a value of
     49 * type enum bfi_tskim_status.
     50 * @wq: Wait queue used to wait for completion of an operation.
     51 */
     52struct bfad_cmd_priv {
     53	unsigned long status;
     54	wait_queue_head_t *wq;
     55};
     56
     57static inline struct bfad_cmd_priv *bfad_priv(struct scsi_cmnd *cmd)
     58{
     59	return scsi_cmd_priv(cmd);
     60}
     61
     62struct bfad_itnim_data_s {
     63	struct bfad_itnim_s *itnim;
     64};
     65
     66struct bfad_im_port_s {
     67	struct bfad_s         *bfad;
     68	struct bfad_port_s    *port;
     69	struct work_struct port_delete_work;
     70	int             idr_id;
     71	u16        cur_scsi_id;
     72	u16	flags;
     73	struct list_head binding_list;
     74	struct Scsi_Host *shost;
     75	struct list_head itnim_mapped_list;
     76	struct fc_vport *fc_vport;
     77};
     78
     79struct bfad_im_port_pointer {
     80	struct bfad_im_port_s *p;
     81};
     82
     83static inline struct bfad_im_port_s *bfad_get_im_port(struct Scsi_Host *host)
     84{
     85	struct bfad_im_port_pointer *im_portp = shost_priv(host);
     86	return im_portp->p;
     87}
     88
     89enum bfad_itnim_state {
     90	ITNIM_STATE_NONE,
     91	ITNIM_STATE_ONLINE,
     92	ITNIM_STATE_OFFLINE_PENDING,
     93	ITNIM_STATE_OFFLINE,
     94	ITNIM_STATE_TIMEOUT,
     95	ITNIM_STATE_FREE,
     96};
     97
     98/*
     99 * Per itnim data structure
    100 */
    101struct bfad_itnim_s {
    102	struct list_head list_entry;
    103	struct bfa_fcs_itnim_s fcs_itnim;
    104	struct work_struct itnim_work;
    105	u32        flags;
    106	enum bfad_itnim_state state;
    107	struct bfad_im_s *im;
    108	struct bfad_im_port_s *im_port;
    109	struct bfad_rport_s *drv_rport;
    110	struct fc_rport *fc_rport;
    111	struct bfa_itnim_s *bfa_itnim;
    112	u16        scsi_tgt_id;
    113	u16	   channel;
    114	u16        queue_work;
    115	unsigned long	last_ramp_up_time;
    116	unsigned long	last_queue_full_time;
    117};
    118
    119enum bfad_binding_type {
    120	FCP_PWWN_BINDING = 0x1,
    121	FCP_NWWN_BINDING = 0x2,
    122	FCP_FCID_BINDING = 0x3,
    123};
    124
    125struct bfad_fcp_binding {
    126	struct list_head list_entry;
    127	enum bfad_binding_type binding_type;
    128	u16        scsi_target_id;
    129	u32        fc_id;
    130	wwn_t           nwwn;
    131	wwn_t           pwwn;
    132};
    133
    134struct bfad_im_s {
    135	struct bfad_s         *bfad;
    136	struct workqueue_struct *drv_workq;
    137	char            drv_workq_name[KOBJ_NAME_LEN];
    138	struct work_struct	aen_im_notify_work;
    139};
    140
    141#define bfad_get_aen_entry(_drv, _entry) do {				\
    142	unsigned long	_flags;						\
    143	spin_lock_irqsave(&(_drv)->bfad_aen_spinlock, _flags);		\
    144	bfa_q_deq(&(_drv)->free_aen_q, &(_entry));			\
    145	if (_entry)							\
    146		list_add_tail(&(_entry)->qe, &(_drv)->active_aen_q);	\
    147	spin_unlock_irqrestore(&(_drv)->bfad_aen_spinlock, _flags);	\
    148} while (0)
    149
    150/* post fc_host vendor event */
    151static inline void bfad_im_post_vendor_event(struct bfa_aen_entry_s *entry,
    152					     struct bfad_s *drv, int cnt,
    153					     enum bfa_aen_category cat,
    154					     int evt)
    155{
    156	struct timespec64 ts;
    157
    158	ktime_get_real_ts64(&ts);
    159	/*
    160	 * 'unsigned long aen_tv_sec' overflows in y2106 on 32-bit
    161	 * architectures, or in 2038 if user space interprets it
    162	 * as 'signed'.
    163	 */
    164	entry->aen_tv_sec = ts.tv_sec;
    165	entry->aen_tv_usec = ts.tv_nsec / NSEC_PER_USEC;
    166	entry->bfad_num = drv->inst_no;
    167	entry->seq_num = cnt;
    168	entry->aen_category = cat;
    169	entry->aen_type = evt;
    170	if (drv->bfad_flags & BFAD_FC4_PROBE_DONE)
    171		queue_work(drv->im->drv_workq, &drv->im->aen_im_notify_work);
    172}
    173
    174struct Scsi_Host *bfad_scsi_host_alloc(struct bfad_im_port_s *im_port,
    175				struct bfad_s *);
    176bfa_status_t bfad_thread_workq(struct bfad_s *bfad);
    177void bfad_destroy_workq(struct bfad_im_s *im);
    178void bfad_fc_host_init(struct bfad_im_port_s *im_port);
    179void bfad_scsi_host_free(struct bfad_s *bfad,
    180				 struct bfad_im_port_s *im_port);
    181void bfad_ramp_up_qdepth(struct bfad_itnim_s *itnim,
    182				 struct scsi_device *sdev);
    183void bfad_handle_qfull(struct bfad_itnim_s *itnim, struct scsi_device *sdev);
    184struct bfad_itnim_s *bfad_get_itnim(struct bfad_im_port_s *im_port, int id);
    185
    186extern struct scsi_host_template bfad_im_scsi_host_template;
    187extern struct scsi_host_template bfad_im_vport_template;
    188extern struct fc_function_template bfad_im_fc_function_template;
    189extern struct fc_function_template bfad_im_vport_fc_function_template;
    190extern struct scsi_transport_template *bfad_im_scsi_transport_template;
    191extern struct scsi_transport_template *bfad_im_scsi_vport_transport_template;
    192
    193extern const struct attribute_group *bfad_im_host_groups[];
    194extern const struct attribute_group *bfad_im_vport_groups[];
    195
    196irqreturn_t bfad_intx(int irq, void *dev_id);
    197
    198int bfad_im_bsg_request(struct bsg_job *job);
    199int bfad_im_bsg_timeout(struct bsg_job *job);
    200
    201/*
    202 * Macro to set the SCSI device sdev_bflags - sdev_bflags are used by the
    203 * SCSI mid-layer to choose LUN Scanning mode REPORT_LUNS vs. Sequential Scan
    204 *
    205 * Internally iterate's over all the ITNIM's part of the im_port & set's the
    206 * sdev_bflags for the scsi_device associated with LUN #0.
    207 */
    208#define bfad_reset_sdev_bflags(__im_port, __lunmask_cfg) do {		\
    209	struct scsi_device *__sdev = NULL;				\
    210	struct bfad_itnim_s *__itnim = NULL;				\
    211	u32 scan_flags = BLIST_NOREPORTLUN | BLIST_SPARSELUN;		\
    212	list_for_each_entry(__itnim, &((__im_port)->itnim_mapped_list),	\
    213			    list_entry) {				\
    214		__sdev = scsi_device_lookup((__im_port)->shost,		\
    215					    __itnim->channel,		\
    216					    __itnim->scsi_tgt_id, 0);	\
    217		if (__sdev) {						\
    218			if ((__lunmask_cfg) == BFA_TRUE)		\
    219				__sdev->sdev_bflags |= scan_flags;	\
    220			else						\
    221				__sdev->sdev_bflags &= ~scan_flags;	\
    222			scsi_device_put(__sdev);			\
    223		}							\
    224	}								\
    225} while (0)
    226
    227#endif