scsi: elx: efct: SCSI I/O handling routines
Routines for SCSI transport IO alloc, build and send I/O. Link: https://lore.kernel.org/r/20210601235512.20104-25-jsmart2021@gmail.com Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Daniel Wagner <dwagner@suse.de> Co-developed-by: Ram Vegesna <ram.vegesna@broadcom.com> Signed-off-by: Ram Vegesna <ram.vegesna@broadcom.com> Signed-off-by: James Smart <jsmart2021@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
James Smart
Martin K. Petersen
parent
f45ae6aac0
commit
3e6414003b
1159
drivers/scsi/elx/efct/efct_scsi.c
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1159
drivers/scsi/elx/efct/efct_scsi.c
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drivers/scsi/elx/efct/efct_scsi.h
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drivers/scsi/elx/efct/efct_scsi.h
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2021 Broadcom. All Rights Reserved. The term
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* “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
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*/
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#if !defined(__EFCT_SCSI_H__)
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#define __EFCT_SCSI_H__
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#include <scsi/scsi_host.h>
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#include <scsi/scsi_transport_fc.h>
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/* efct_scsi_rcv_cmd() efct_scsi_rcv_tmf() flags */
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#define EFCT_SCSI_CMD_DIR_IN (1 << 0)
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#define EFCT_SCSI_CMD_DIR_OUT (1 << 1)
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#define EFCT_SCSI_CMD_SIMPLE (1 << 2)
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#define EFCT_SCSI_CMD_HEAD_OF_QUEUE (1 << 3)
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#define EFCT_SCSI_CMD_ORDERED (1 << 4)
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#define EFCT_SCSI_CMD_UNTAGGED (1 << 5)
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#define EFCT_SCSI_CMD_ACA (1 << 6)
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#define EFCT_SCSI_FIRST_BURST_ERR (1 << 7)
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#define EFCT_SCSI_FIRST_BURST_ABORTED (1 << 8)
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/* efct_scsi_send_rd_data/recv_wr_data/send_resp flags */
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#define EFCT_SCSI_LAST_DATAPHASE (1 << 0)
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#define EFCT_SCSI_NO_AUTO_RESPONSE (1 << 1)
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#define EFCT_SCSI_LOW_LATENCY (1 << 2)
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#define EFCT_SCSI_SNS_BUF_VALID(sense) ((sense) && \
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(0x70 == (((const u8 *)(sense))[0] & 0x70)))
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#define EFCT_SCSI_WQ_STEERING_SHIFT 16
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#define EFCT_SCSI_WQ_STEERING_MASK (0xf << EFCT_SCSI_WQ_STEERING_SHIFT)
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#define EFCT_SCSI_WQ_STEERING_CLASS (0 << EFCT_SCSI_WQ_STEERING_SHIFT)
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#define EFCT_SCSI_WQ_STEERING_REQUEST (1 << EFCT_SCSI_WQ_STEERING_SHIFT)
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#define EFCT_SCSI_WQ_STEERING_CPU (2 << EFCT_SCSI_WQ_STEERING_SHIFT)
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#define EFCT_SCSI_WQ_CLASS_SHIFT (20)
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#define EFCT_SCSI_WQ_CLASS_MASK (0xf << EFCT_SCSI_WQ_CLASS_SHIFT)
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#define EFCT_SCSI_WQ_CLASS(x) ((x & EFCT_SCSI_WQ_CLASS_MASK) << \
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EFCT_SCSI_WQ_CLASS_SHIFT)
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#define EFCT_SCSI_WQ_CLASS_LOW_LATENCY 1
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struct efct_scsi_cmd_resp {
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u8 scsi_status;
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u16 scsi_status_qualifier;
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u8 *response_data;
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u32 response_data_length;
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u8 *sense_data;
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u32 sense_data_length;
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int residual;
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u32 response_wire_length;
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};
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struct efct_vport {
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struct efct *efct;
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bool is_vport;
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struct fc_host_statistics fc_host_stats;
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struct Scsi_Host *shost;
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struct fc_vport *fc_vport;
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u64 npiv_wwpn;
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u64 npiv_wwnn;
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};
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/* Status values returned by IO callbacks */
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enum efct_scsi_io_status {
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EFCT_SCSI_STATUS_GOOD = 0,
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EFCT_SCSI_STATUS_ABORTED,
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EFCT_SCSI_STATUS_ERROR,
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EFCT_SCSI_STATUS_DIF_GUARD_ERR,
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EFCT_SCSI_STATUS_DIF_REF_TAG_ERROR,
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EFCT_SCSI_STATUS_DIF_APP_TAG_ERROR,
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EFCT_SCSI_STATUS_DIF_UNKNOWN_ERROR,
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EFCT_SCSI_STATUS_PROTOCOL_CRC_ERROR,
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EFCT_SCSI_STATUS_NO_IO,
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EFCT_SCSI_STATUS_ABORT_IN_PROGRESS,
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EFCT_SCSI_STATUS_CHECK_RESPONSE,
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EFCT_SCSI_STATUS_COMMAND_TIMEOUT,
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EFCT_SCSI_STATUS_TIMEDOUT_AND_ABORTED,
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EFCT_SCSI_STATUS_SHUTDOWN,
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EFCT_SCSI_STATUS_NEXUS_LOST,
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};
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struct efct_node;
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struct efct_io;
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struct efc_node;
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struct efc_nport;
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/* Callback used by send_rd_data(), recv_wr_data(), send_resp() */
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typedef int (*efct_scsi_io_cb_t)(struct efct_io *io,
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enum efct_scsi_io_status status,
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u32 flags, void *arg);
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/* Callback used by send_rd_io(), send_wr_io() */
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typedef int (*efct_scsi_rsp_io_cb_t)(struct efct_io *io,
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enum efct_scsi_io_status status,
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struct efct_scsi_cmd_resp *rsp,
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u32 flags, void *arg);
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/* efct_scsi_cb_t flags */
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#define EFCT_SCSI_IO_CMPL (1 << 0)
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/* IO completed, response sent */
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#define EFCT_SCSI_IO_CMPL_RSP_SENT (1 << 1)
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#define EFCT_SCSI_IO_ABORTED (1 << 2)
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/* efct_scsi_recv_tmf() request values */
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enum efct_scsi_tmf_cmd {
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EFCT_SCSI_TMF_ABORT_TASK = 1,
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EFCT_SCSI_TMF_QUERY_TASK_SET,
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EFCT_SCSI_TMF_ABORT_TASK_SET,
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EFCT_SCSI_TMF_CLEAR_TASK_SET,
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EFCT_SCSI_TMF_QUERY_ASYNCHRONOUS_EVENT,
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EFCT_SCSI_TMF_LOGICAL_UNIT_RESET,
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EFCT_SCSI_TMF_CLEAR_ACA,
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EFCT_SCSI_TMF_TARGET_RESET,
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};
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/* efct_scsi_send_tmf_resp() response values */
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enum efct_scsi_tmf_resp {
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EFCT_SCSI_TMF_FUNCTION_COMPLETE = 1,
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EFCT_SCSI_TMF_FUNCTION_SUCCEEDED,
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EFCT_SCSI_TMF_FUNCTION_IO_NOT_FOUND,
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EFCT_SCSI_TMF_FUNCTION_REJECTED,
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EFCT_SCSI_TMF_INCORRECT_LOGICAL_UNIT_NUMBER,
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EFCT_SCSI_TMF_SERVICE_DELIVERY,
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};
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struct efct_scsi_sgl {
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uintptr_t addr;
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uintptr_t dif_addr;
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size_t len;
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};
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enum efct_scsi_io_role {
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EFCT_SCSI_IO_ROLE_ORIGINATOR,
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EFCT_SCSI_IO_ROLE_RESPONDER,
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};
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struct efct_io *
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efct_scsi_io_alloc(struct efct_node *node);
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void efct_scsi_io_free(struct efct_io *io);
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struct efct_io *efct_io_get_instance(struct efct *efct, u32 index);
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int efct_scsi_tgt_driver_init(void);
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int efct_scsi_tgt_driver_exit(void);
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int efct_scsi_tgt_new_device(struct efct *efct);
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int efct_scsi_tgt_del_device(struct efct *efct);
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int
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efct_scsi_tgt_new_nport(struct efc *efc, struct efc_nport *nport);
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void
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efct_scsi_tgt_del_nport(struct efc *efc, struct efc_nport *nport);
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int
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efct_scsi_new_initiator(struct efc *efc, struct efc_node *node);
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enum efct_scsi_del_initiator_reason {
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EFCT_SCSI_INITIATOR_DELETED,
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EFCT_SCSI_INITIATOR_MISSING,
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};
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int
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efct_scsi_del_initiator(struct efc *efc, struct efc_node *node, int reason);
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void
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efct_scsi_recv_cmd(struct efct_io *io, uint64_t lun, u8 *cdb, u32 cdb_len,
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u32 flags);
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int
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efct_scsi_recv_tmf(struct efct_io *tmfio, u32 lun, enum efct_scsi_tmf_cmd cmd,
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struct efct_io *abortio, u32 flags);
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int
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efct_scsi_send_rd_data(struct efct_io *io, u32 flags, struct efct_scsi_sgl *sgl,
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u32 sgl_count, u64 wire_len, efct_scsi_io_cb_t cb, void *arg);
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int
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efct_scsi_recv_wr_data(struct efct_io *io, u32 flags, struct efct_scsi_sgl *sgl,
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u32 sgl_count, u64 wire_len, efct_scsi_io_cb_t cb, void *arg);
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int
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efct_scsi_send_resp(struct efct_io *io, u32 flags,
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struct efct_scsi_cmd_resp *rsp, efct_scsi_io_cb_t cb, void *arg);
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int
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efct_scsi_send_tmf_resp(struct efct_io *io, enum efct_scsi_tmf_resp rspcode,
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u8 addl_rsp_info[3], efct_scsi_io_cb_t cb, void *arg);
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int
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efct_scsi_tgt_abort_io(struct efct_io *io, efct_scsi_io_cb_t cb, void *arg);
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void efct_scsi_io_complete(struct efct_io *io);
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int efct_scsi_reg_fc_transport(void);
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void efct_scsi_release_fc_transport(void);
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int efct_scsi_new_device(struct efct *efct);
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void efct_scsi_del_device(struct efct *efct);
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void _efct_scsi_io_free(struct kref *arg);
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int
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efct_scsi_del_vport(struct efct *efct, struct Scsi_Host *shost);
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struct efct_vport *
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efct_scsi_new_vport(struct efct *efct, struct device *dev);
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int efct_scsi_io_dispatch(struct efct_io *io, void *cb);
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int efct_scsi_io_dispatch_abort(struct efct_io *io, void *cb);
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void efct_scsi_check_pending(struct efct *efct);
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struct efct_io *
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efct_bls_send_rjt(struct efct_io *io, struct fc_frame_header *hdr);
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#endif /* __EFCT_SCSI_H__ */
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