175 lines
4.7 KiB
C
175 lines
4.7 KiB
C
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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_IO_H__)
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#define __EFCT_IO_H__
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#include "efct_lio.h"
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#define EFCT_LOG_ENABLE_IO_ERRORS(efct) \
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(((efct) != NULL) ? (((efct)->logmask & (1U << 6)) != 0) : 0)
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#define io_error_log(io, fmt, ...) \
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do { \
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if (EFCT_LOG_ENABLE_IO_ERRORS(io->efct)) \
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efc_log_warn(io->efct, fmt, ##__VA_ARGS__); \
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} while (0)
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#define SCSI_CMD_BUF_LENGTH 48
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#define SCSI_RSP_BUF_LENGTH (FCP_RESP_WITH_EXT + SCSI_SENSE_BUFFERSIZE)
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#define EFCT_NUM_SCSI_IOS 8192
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enum efct_io_type {
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EFCT_IO_TYPE_IO = 0,
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EFCT_IO_TYPE_ELS,
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EFCT_IO_TYPE_CT,
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EFCT_IO_TYPE_CT_RESP,
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EFCT_IO_TYPE_BLS_RESP,
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EFCT_IO_TYPE_ABORT,
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EFCT_IO_TYPE_MAX,
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};
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enum efct_els_state {
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EFCT_ELS_REQUEST = 0,
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EFCT_ELS_REQUEST_DELAYED,
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EFCT_ELS_REQUEST_DELAY_ABORT,
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EFCT_ELS_REQ_ABORT,
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EFCT_ELS_REQ_ABORTED,
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EFCT_ELS_ABORT_IO_COMPL,
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};
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/**
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* Scsi target IO object
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* @efct: pointer back to efct
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* @instance_index: unique instance index value
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* @io: IO display name
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* @node: pointer to node
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* @list_entry: io list entry
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* @io_pending_link: io pending list entry
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* @ref: reference counter
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* @release: release callback function
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* @init_task_tag: initiator task tag (OX_ID) for back-end and SCSI logging
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* @tgt_task_tag: target task tag (RX_ID) for back-end and SCSI logging
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* @hw_tag: HW layer unique IO id
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* @tag: unique IO identifier
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* @sgl: SGL
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* @sgl_allocated: Number of allocated SGEs
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* @sgl_count: Number of SGEs in this SGL
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* @tgt_io: backend target private IO data
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* @exp_xfer_len: expected data transfer length, based on FC header
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* @hw_priv: Declarations private to HW/SLI
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* @io_type: indicates what this struct efct_io structure is used for
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* @hio: hw io object
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* @transferred: Number of bytes transferred
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* @auto_resp: set if auto_trsp was set
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* @low_latency: set if low latency request
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* @wq_steering: selected WQ steering request
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* @wq_class: selected WQ class if steering is class
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* @xfer_req: transfer size for current request
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* @scsi_tgt_cb: target callback function
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* @scsi_tgt_cb_arg: target callback function argument
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* @abort_cb: abort callback function
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* @abort_cb_arg: abort callback function argument
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* @bls_cb: BLS callback function
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* @bls_cb_arg: BLS callback function argument
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* @tmf_cmd: TMF command being processed
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* @abort_rx_id: rx_id from the ABTS that initiated the command abort
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* @cmd_tgt: True if this is a Target command
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* @send_abts: when aborting, indicates ABTS is to be sent
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* @cmd_ini: True if this is an Initiator command
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* @seq_init: True if local node has sequence initiative
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* @iparam: iparams for hw io send call
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* @hio_type: HW IO type
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* @wire_len: wire length
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* @hw_cb: saved HW callback
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* @io_to_abort: for abort handling, pointer to IO to abort
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* @rspbuf: SCSI Response buffer
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* @timeout: Timeout value in seconds for this IO
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* @cs_ctl: CS_CTL priority for this IO
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* @io_free: Is io object in freelist
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* @app_id: application id
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*/
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struct efct_io {
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struct efct *efct;
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u32 instance_index;
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const char *display_name;
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struct efct_node *node;
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struct list_head list_entry;
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struct list_head io_pending_link;
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struct kref ref;
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void (*release)(struct kref *arg);
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u32 init_task_tag;
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u32 tgt_task_tag;
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u32 hw_tag;
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u32 tag;
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struct efct_scsi_sgl *sgl;
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u32 sgl_allocated;
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u32 sgl_count;
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struct efct_scsi_tgt_io tgt_io;
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u32 exp_xfer_len;
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void *hw_priv;
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enum efct_io_type io_type;
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struct efct_hw_io *hio;
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size_t transferred;
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bool auto_resp;
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bool low_latency;
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u8 wq_steering;
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u8 wq_class;
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u64 xfer_req;
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efct_scsi_io_cb_t scsi_tgt_cb;
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void *scsi_tgt_cb_arg;
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efct_scsi_io_cb_t abort_cb;
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void *abort_cb_arg;
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efct_scsi_io_cb_t bls_cb;
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void *bls_cb_arg;
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enum efct_scsi_tmf_cmd tmf_cmd;
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u16 abort_rx_id;
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bool cmd_tgt;
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bool send_abts;
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bool cmd_ini;
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bool seq_init;
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union efct_hw_io_param_u iparam;
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enum efct_hw_io_type hio_type;
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u64 wire_len;
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void *hw_cb;
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struct efct_io *io_to_abort;
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struct efc_dma rspbuf;
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u32 timeout;
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u8 cs_ctl;
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u8 io_free;
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u32 app_id;
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};
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struct efct_io_cb_arg {
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int status;
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int ext_status;
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void *app;
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};
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struct efct_io_pool *
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efct_io_pool_create(struct efct *efct, u32 num_sgl);
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int
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efct_io_pool_free(struct efct_io_pool *io_pool);
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u32
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efct_io_pool_allocated(struct efct_io_pool *io_pool);
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struct efct_io *
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efct_io_pool_io_alloc(struct efct_io_pool *io_pool);
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void
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efct_io_pool_io_free(struct efct_io_pool *io_pool, struct efct_io *io);
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struct efct_io *
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efct_io_find_tgt_io(struct efct *efct, struct efct_node *node,
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u16 ox_id, u16 rx_id);
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#endif /* __EFCT_IO_H__ */
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