diff options
Diffstat (limited to 'drivers/scsi/elx/efct/efct_io.h')
| -rw-r--r-- | drivers/scsi/elx/efct/efct_io.h | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/drivers/scsi/elx/efct/efct_io.h b/drivers/scsi/elx/efct/efct_io.h new file mode 100644 index 000000000000..bb0f51811a7c --- /dev/null +++ b/drivers/scsi/elx/efct/efct_io.h @@ -0,0 +1,174 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2021 Broadcom. All Rights Reserved. The term + * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries. + */ + +#if !defined(__EFCT_IO_H__) +#define __EFCT_IO_H__ + +#include "efct_lio.h" + +#define EFCT_LOG_ENABLE_IO_ERRORS(efct) \ + (((efct) != NULL) ? (((efct)->logmask & (1U << 6)) != 0) : 0) + +#define io_error_log(io, fmt, ...) \ + do { \ + if (EFCT_LOG_ENABLE_IO_ERRORS(io->efct)) \ + efc_log_warn(io->efct, fmt, ##__VA_ARGS__); \ + } while (0) + +#define SCSI_CMD_BUF_LENGTH 48 +#define SCSI_RSP_BUF_LENGTH (FCP_RESP_WITH_EXT + SCSI_SENSE_BUFFERSIZE) +#define EFCT_NUM_SCSI_IOS 8192 + +enum efct_io_type { + EFCT_IO_TYPE_IO = 0, + EFCT_IO_TYPE_ELS, + EFCT_IO_TYPE_CT, + EFCT_IO_TYPE_CT_RESP, + EFCT_IO_TYPE_BLS_RESP, + EFCT_IO_TYPE_ABORT, + + EFCT_IO_TYPE_MAX, +}; + +enum efct_els_state { + EFCT_ELS_REQUEST = 0, + EFCT_ELS_REQUEST_DELAYED, + EFCT_ELS_REQUEST_DELAY_ABORT, + EFCT_ELS_REQ_ABORT, + EFCT_ELS_REQ_ABORTED, + EFCT_ELS_ABORT_IO_COMPL, +}; + +/** + * Scsi target IO object + * @efct: pointer back to efct + * @instance_index: unique instance index value + * @io: IO display name + * @node: pointer to node + * @list_entry: io list entry + * @io_pending_link: io pending list entry + * @ref: reference counter + * @release: release callback function + * @init_task_tag: initiator task tag (OX_ID) for back-end and SCSI logging + * @tgt_task_tag: target task tag (RX_ID) for back-end and SCSI logging + * @hw_tag: HW layer unique IO id + * @tag: unique IO identifier + * @sgl: SGL + * @sgl_allocated: Number of allocated SGEs + * @sgl_count: Number of SGEs in this SGL + * @tgt_io: backend target private IO data + * @exp_xfer_len: expected data transfer length, based on FC header + * @hw_priv: Declarations private to HW/SLI + * @io_type: indicates what this struct efct_io structure is used for + * @hio: hw io object + * @transferred: Number of bytes transferred + * @auto_resp: set if auto_trsp was set + * @low_latency: set if low latency request + * @wq_steering: selected WQ steering request + * @wq_class: selected WQ class if steering is class + * @xfer_req: transfer size for current request + * @scsi_tgt_cb: target callback function + * @scsi_tgt_cb_arg: target callback function argument + * @abort_cb: abort callback function + * @abort_cb_arg: abort callback function argument + * @bls_cb: BLS callback function + * @bls_cb_arg: BLS callback function argument + * @tmf_cmd: TMF command being processed + * @abort_rx_id: rx_id from the ABTS that initiated the command abort + * @cmd_tgt: True if this is a Target command + * @send_abts: when aborting, indicates ABTS is to be sent + * @cmd_ini: True if this is an Initiator command + * @seq_init: True if local node has sequence initiative + * @iparam: iparams for hw io send call + * @hio_type: HW IO type + * @wire_len: wire length + * @hw_cb: saved HW callback + * @io_to_abort: for abort handling, pointer to IO to abort + * @rspbuf: SCSI Response buffer + * @timeout: Timeout value in seconds for this IO + * @cs_ctl: CS_CTL priority for this IO + * @io_free: Is io object in freelist + * @app_id: application id + */ +struct efct_io { + struct efct *efct; + u32 instance_index; + const char *display_name; + struct efct_node *node; + + struct list_head list_entry; + struct list_head io_pending_link; + struct kref ref; + void (*release)(struct kref *arg); + u32 init_task_tag; + u32 tgt_task_tag; + u32 hw_tag; + u32 tag; + struct efct_scsi_sgl *sgl; + u32 sgl_allocated; + u32 sgl_count; + struct efct_scsi_tgt_io tgt_io; + u32 exp_xfer_len; + + void *hw_priv; + + enum efct_io_type io_type; + struct efct_hw_io *hio; + size_t transferred; + + bool auto_resp; + bool low_latency; + u8 wq_steering; + u8 wq_class; + u64 xfer_req; + efct_scsi_io_cb_t scsi_tgt_cb; + void *scsi_tgt_cb_arg; + efct_scsi_io_cb_t abort_cb; + void *abort_cb_arg; + efct_scsi_io_cb_t bls_cb; + void *bls_cb_arg; + enum efct_scsi_tmf_cmd tmf_cmd; + u16 abort_rx_id; + + bool cmd_tgt; + bool send_abts; + bool cmd_ini; + bool seq_init; + union efct_hw_io_param_u iparam; + enum efct_hw_io_type hio_type; + u64 wire_len; + void *hw_cb; + + struct efct_io *io_to_abort; + + struct efc_dma rspbuf; + u32 timeout; + u8 cs_ctl; + u8 io_free; + u32 app_id; +}; + +struct efct_io_cb_arg { + int status; + int ext_status; + void *app; +}; + +struct efct_io_pool * +efct_io_pool_create(struct efct *efct, u32 num_sgl); +int +efct_io_pool_free(struct efct_io_pool *io_pool); +u32 +efct_io_pool_allocated(struct efct_io_pool *io_pool); + +struct efct_io * +efct_io_pool_io_alloc(struct efct_io_pool *io_pool); +void +efct_io_pool_io_free(struct efct_io_pool *io_pool, struct efct_io *io); +struct efct_io * +efct_io_find_tgt_io(struct efct *efct, struct efct_node *node, + u16 ox_id, u16 rx_id); +#endif /* __EFCT_IO_H__ */ |