elx/efct/efct_lio.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 /*
0003  * Copyright (C) 2021 Broadcom. All Rights Reserved. The term
0004  * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
0005  */
0006
0007 #ifndef __EFCT_LIO_H__
0008 #define __EFCT_LIO_H__
0009
0010 #include "efct_scsi.h"
0011 #include <target/target_core_base.h>
0012
0013 #define efct_lio_io_printf(io, fmt, ...)            \
0014     efc_log_debug(io->efct,                 \
0015         "[%s] [%04x][i:%04x t:%04x h:%04x]" fmt,\
0016         io->node->display_name, io->instance_index, \
0017         io->init_task_tag, io->tgt_task_tag, io->hw_tag,\
0018         ##__VA_ARGS__)
0019
0020 #define efct_lio_tmfio_printf(io, fmt, ...)         \
0021     efc_log_debug(io->efct,                 \
0022         "[%s] [%04x][i:%04x t:%04x h:%04x][f:%02x]" fmt,\
0023         io->node->display_name, io->instance_index, \
0024         io->init_task_tag, io->tgt_task_tag, io->hw_tag,\
0025         io->tgt_io.tmf,  ##__VA_ARGS__)
0026
0027 #define efct_set_lio_io_state(io, value) (io->tgt_io.state |= value)
0028
0029 struct efct_lio_wq_data {
0030     struct efct     *efct;
0031     void            *ptr;
0032     struct work_struct  work;
0033 };
0034
0035 /* Target private efct structure */
0036 struct efct_scsi_tgt {
0037     u32         max_sge;
0038     u32         max_sgl;
0039
0040     /*
0041      * Variables used to send task set full. We are using a high watermark
0042      * method to send task set full. We will reserve a fixed number of IOs
0043      * per initiator plus a fudge factor. Once we reach this number,
0044      * then the target will start sending task set full/busy responses.
0045      */
0046     atomic_t        initiator_count;
0047     atomic_t        ios_in_use;
0048     atomic_t        io_high_watermark;
0049
0050     atomic_t        watermark_hit;
0051     int         watermark_min;
0052     int         watermark_max;
0053
0054     struct efct_lio_nport   *lio_nport;
0055     struct efct_lio_tpg *tpg;
0056
0057     struct list_head    vport_list;
0058     /* Protects vport list*/
0059     spinlock_t      efct_lio_lock;
0060
0061     u64         wwnn;
0062 };
0063
0064 struct efct_scsi_tgt_nport {
0065     struct efct_lio_nport   *lio_nport;
0066 };
0067
0068 struct efct_node {
0069     struct list_head    list_entry;
0070     struct kref     ref;
0071     void            (*release)(struct kref *arg);
0072     struct efct     *efct;
0073     struct efc_node     *node;
0074     struct se_session   *session;
0075     spinlock_t      active_ios_lock;
0076     struct list_head    active_ios;
0077     char            display_name[EFC_NAME_LENGTH];
0078     u32         port_fc_id;
0079     u32         node_fc_id;
0080     u32         vpi;
0081     u32         rpi;
0082     u32         abort_cnt;
0083 };
0084
0085 #define EFCT_LIO_STATE_SCSI_RECV_CMD        (1 << 0)
0086 #define EFCT_LIO_STATE_TGT_SUBMIT_CMD       (1 << 1)
0087 #define EFCT_LIO_STATE_TFO_QUEUE_DATA_IN    (1 << 2)
0088 #define EFCT_LIO_STATE_TFO_WRITE_PENDING    (1 << 3)
0089 #define EFCT_LIO_STATE_TGT_EXECUTE_CMD      (1 << 4)
0090 #define EFCT_LIO_STATE_SCSI_SEND_RD_DATA    (1 << 5)
0091 #define EFCT_LIO_STATE_TFO_CHK_STOP_FREE    (1 << 6)
0092 #define EFCT_LIO_STATE_SCSI_DATA_DONE       (1 << 7)
0093 #define EFCT_LIO_STATE_TFO_QUEUE_STATUS     (1 << 8)
0094 #define EFCT_LIO_STATE_SCSI_SEND_RSP        (1 << 9)
0095 #define EFCT_LIO_STATE_SCSI_RSP_DONE        (1 << 10)
0096 #define EFCT_LIO_STATE_TGT_GENERIC_FREE     (1 << 11)
0097 #define EFCT_LIO_STATE_SCSI_RECV_TMF        (1 << 12)
0098 #define EFCT_LIO_STATE_TGT_SUBMIT_TMR       (1 << 13)
0099 #define EFCT_LIO_STATE_TFO_WRITE_PEND_STATUS    (1 << 14)
0100 #define EFCT_LIO_STATE_TGT_GENERIC_REQ_FAILURE  (1 << 15)
0101
0102 #define EFCT_LIO_STATE_TFO_ABORTED_TASK     (1 << 29)
0103 #define EFCT_LIO_STATE_TFO_RELEASE_CMD      (1 << 30)
0104 #define EFCT_LIO_STATE_SCSI_CMPL_CMD        (1u << 31)
0105
0106 struct efct_scsi_tgt_io {
0107     struct se_cmd       cmd;
0108     unsigned char       sense_buffer[TRANSPORT_SENSE_BUFFER];
0109     enum dma_data_direction ddir;
0110     int         task_attr;
0111     u64         lun;
0112
0113     u32         state;
0114     u8          tmf;
0115     struct efct_io      *io_to_abort;
0116     u32         seg_map_cnt;
0117     u32         seg_cnt;
0118     u32         cur_seg;
0119     enum efct_scsi_io_status err;
0120     bool            aborting;
0121     bool            rsp_sent;
0122     u32         transferred_len;
0123 };
0124
0125 /* Handler return codes */
0126 enum {
0127     SCSI_HANDLER_DATAPHASE_STARTED = 1,
0128     SCSI_HANDLER_RESP_STARTED,
0129     SCSI_HANDLER_VALIDATED_DATAPHASE_STARTED,
0130     SCSI_CMD_NOT_SUPPORTED,
0131 };
0132
0133 #define WWN_NAME_LEN        32
0134 struct efct_lio_vport {
0135     u64         wwpn;
0136     u64         npiv_wwpn;
0137     u64         npiv_wwnn;
0138     unsigned char       wwpn_str[WWN_NAME_LEN];
0139     struct se_wwn       vport_wwn;
0140     struct efct_lio_tpg *tpg;
0141     struct efct     *efct;
0142     struct Scsi_Host    *shost;
0143     struct fc_vport     *fc_vport;
0144     atomic_t        enable;
0145 };
0146
0147 struct efct_lio_nport {
0148     u64         wwpn;
0149     unsigned char       wwpn_str[WWN_NAME_LEN];
0150     struct se_wwn       nport_wwn;
0151     struct efct_lio_tpg *tpg;
0152     struct efct     *efct;
0153     atomic_t        enable;
0154 };
0155
0156 struct efct_lio_tpg_attrib {
0157     u32         generate_node_acls;
0158     u32         cache_dynamic_acls;
0159     u32         demo_mode_write_protect;
0160     u32         prod_mode_write_protect;
0161     u32         demo_mode_login_only;
0162     bool            session_deletion_wait;
0163 };
0164
0165 struct efct_lio_tpg {
0166     struct se_portal_group  tpg;
0167     struct efct_lio_nport   *nport;
0168     struct efct_lio_vport   *vport;
0169     struct efct_lio_tpg_attrib tpg_attrib;
0170     unsigned short      tpgt;
0171     bool            enabled;
0172 };
0173
0174 struct efct_lio_nacl {
0175     u64         nport_wwnn;
0176     char            nport_name[WWN_NAME_LEN];
0177     struct se_session   *session;
0178     struct se_node_acl  se_node_acl;
0179 };
0180
0181 struct efct_lio_vport_list_t {
0182     struct list_head    list_entry;
0183     struct efct_lio_vport   *lio_vport;
0184 };
0185
0186 int efct_scsi_tgt_driver_init(void);
0187 int efct_scsi_tgt_driver_exit(void);
0188
0189 #endif /*__EFCT_LIO_H__ */