scsi: elx: efct: Hardware queues processing (e2cf422b) · Commits · EulixOS / Software / Kernel

drivers/scsi/elx/efct/efct_hw.c

+360 −0

Original line number	Diff line number	Diff line
		@@ -2131,3 +2131,363 @@ efct_hw_reqtag_get_instance(struct efct_hw *hw, u32 instance_index)

		return wqcb;
		}

		int
		efct_hw_queue_hash_find(struct efct_queue_hash *hash, u16 id)
		{
		int index = -1;
		int i = id & (EFCT_HW_Q_HASH_SIZE - 1);

		/*
		* Since the hash is always bigger than the maximum number of Qs, then
		* we never have to worry about an infinite loop. We will always find
		* an unused entry.
		*/
		do {
		if (hash[i].in_use && hash[i].id == id)
		index = hash[i].index;
		else
		i = (i + 1) & (EFCT_HW_Q_HASH_SIZE - 1);
		} while (index == -1 && hash[i].in_use);

		return index;
		}

		int
		efct_hw_process(struct efct_hw *hw, u32 vector,
		u32 max_isr_time_msec)
		{
		struct hw_eq *eq;

		/*
		* The caller should disable interrupts if they wish to prevent us
		* from processing during a shutdown. The following states are defined:
		* EFCT_HW_STATE_UNINITIALIZED - No queues allocated
		* EFCT_HW_STATE_QUEUES_ALLOCATED - The state after a chip reset,
		* queues are cleared.
		* EFCT_HW_STATE_ACTIVE - Chip and queues are operational
		* EFCT_HW_STATE_RESET_IN_PROGRESS - reset, we still want completions
		* EFCT_HW_STATE_TEARDOWN_IN_PROGRESS - We still want mailbox
		* completions.
		*/
		if (hw->state == EFCT_HW_STATE_UNINITIALIZED)
		return 0;

		/* Get pointer to struct hw_eq */
		eq = hw->hw_eq[vector];
		if (!eq)
		return 0;

		eq->use_count++;

		return efct_hw_eq_process(hw, eq, max_isr_time_msec);
		}

		int
		efct_hw_eq_process(struct efct_hw hw, struct hw_eq eq,
		u32 max_isr_time_msec)
		{
		u8 eqe[sizeof(struct sli4_eqe)] = { 0 };
		u32 tcheck_count;
		u64 tstart;
		u64 telapsed;
		bool done = false;

		tcheck_count = EFCT_HW_TIMECHECK_ITERATIONS;
		tstart = jiffies_to_msecs(jiffies);

		while (!done && !sli_eq_read(&hw->sli, eq->queue, eqe)) {
		u16 cq_id = 0;
		int rc;

		rc = sli_eq_parse(&hw->sli, eqe, &cq_id);
		if (unlikely(rc)) {
		if (rc == SLI4_EQE_STATUS_EQ_FULL) {
		u32 i;

		/*
		* Received a sentinel EQE indicating the
		* EQ is full. Process all CQs
		*/
		for (i = 0; i < hw->cq_count; i++)
		efct_hw_cq_process(hw, hw->hw_cq[i]);
		continue;
		} else {
		return rc;
		}
		} else {
		int index;

		index = efct_hw_queue_hash_find(hw->cq_hash, cq_id);

		if (likely(index >= 0))
		efct_hw_cq_process(hw, hw->hw_cq[index]);
		else
		efc_log_err(hw->os, "bad CQ_ID %#06x\n", cq_id);
		}

		if (eq->queue->n_posted > eq->queue->posted_limit)
		sli_queue_arm(&hw->sli, eq->queue, false);

		if (tcheck_count && (--tcheck_count == 0)) {
		tcheck_count = EFCT_HW_TIMECHECK_ITERATIONS;
		telapsed = jiffies_to_msecs(jiffies) - tstart;
		if (telapsed >= max_isr_time_msec)
		done = true;
		}
		}
		sli_queue_eq_arm(&hw->sli, eq->queue, true);

		return 0;
		}

		static int
		_efct_hw_wq_write(struct hw_wq wq, struct efct_hw_wqe wqe)
		{
		int queue_rc;

		/* Every so often, set the wqec bit to generate comsummed completions */
		if (wq->wqec_count)
		wq->wqec_count--;

		if (wq->wqec_count == 0) {
		struct sli4_generic_wqe genwqe = (void )wqe->wqebuf;

		genwqe->cmdtype_wqec_byte \|= SLI4_GEN_WQE_WQEC;
		wq->wqec_count = wq->wqec_set_count;
		}

		/* Decrement WQ free count */
		wq->free_count--;

		queue_rc = sli_wq_write(&wq->hw->sli, wq->queue, wqe->wqebuf);

		return (queue_rc < 0) ? -EIO : 0;
		}

		static void
		hw_wq_submit_pending(struct hw_wq *wq, u32 update_free_count)
		{
		struct efct_hw_wqe *wqe;
		unsigned long flags = 0;

		spin_lock_irqsave(&wq->queue->lock, flags);

		/* Update free count with value passed in */
		wq->free_count += update_free_count;

		while ((wq->free_count > 0) && (!list_empty(&wq->pending_list))) {
		wqe = list_first_entry(&wq->pending_list,
		struct efct_hw_wqe, list_entry);
		list_del_init(&wqe->list_entry);
		_efct_hw_wq_write(wq, wqe);

		if (wqe->abort_wqe_submit_needed) {
		wqe->abort_wqe_submit_needed = false;
		efct_hw_fill_abort_wqe(wq->hw, wqe);
		INIT_LIST_HEAD(&wqe->list_entry);
		list_add_tail(&wqe->list_entry, &wq->pending_list);
		wq->wq_pending_count++;
		}
		}

		spin_unlock_irqrestore(&wq->queue->lock, flags);
		}

		void
		efct_hw_cq_process(struct efct_hw hw, struct hw_cq cq)
		{
		u8 cqe[sizeof(struct sli4_mcqe)];
		u16 rid = U16_MAX;
		/* completion type */
		enum sli4_qentry ctype;
		u32 n_processed = 0;
		u32 tstart, telapsed;

		tstart = jiffies_to_msecs(jiffies);

		while (!sli_cq_read(&hw->sli, cq->queue, cqe)) {
		int status;

		status = sli_cq_parse(&hw->sli, cq->queue, cqe, &ctype, &rid);
		/*
		* The sign of status is significant. If status is:
		* == 0 : call completed correctly and
		* the CQE indicated success
		* > 0 : call completed correctly and
		* the CQE indicated an error
		* < 0 : call failed and no information is available about the
		* CQE
		*/
		if (status < 0) {
		if (status == SLI4_MCQE_STATUS_NOT_COMPLETED)
		/*
		* Notification that an entry was consumed,
		* but not completed
		*/
		continue;

		break;
		}

		switch (ctype) {
		case SLI4_QENTRY_ASYNC:
		sli_cqe_async(&hw->sli, cqe);
		break;
		case SLI4_QENTRY_MQ:
		/*
		* Process MQ entry. Note there is no way to determine
		* the MQ_ID from the completion entry.
		*/
		efct_hw_mq_process(hw, status, hw->mq);
		break;
		case SLI4_QENTRY_WQ:
		efct_hw_wq_process(hw, cq, cqe, status, rid);
		break;
		case SLI4_QENTRY_WQ_RELEASE: {
		u32 wq_id = rid;
		int index;
		struct hw_wq *wq = NULL;

		index = efct_hw_queue_hash_find(hw->wq_hash, wq_id);

		if (likely(index >= 0)) {
		wq = hw->hw_wq[index];
		} else {
		efc_log_err(hw->os, "bad WQ_ID %#06x\n", wq_id);
		break;
		}
		/* Submit any HW IOs that are on the WQ pending list */
		hw_wq_submit_pending(wq, wq->wqec_set_count);

		break;
		}

		case SLI4_QENTRY_RQ:
		efct_hw_rqpair_process_rq(hw, cq, cqe);
		break;
		case SLI4_QENTRY_XABT: {
		efct_hw_xabt_process(hw, cq, cqe, rid);
		break;
		}
		default:
		efc_log_debug(hw->os, "unhandled ctype=%#x rid=%#x\n",
		ctype, rid);
		break;
		}

		n_processed++;
		if (n_processed == cq->queue->proc_limit)
		break;

		if (cq->queue->n_posted >= cq->queue->posted_limit)
		sli_queue_arm(&hw->sli, cq->queue, false);
		}

		sli_queue_arm(&hw->sli, cq->queue, true);

		if (n_processed > cq->queue->max_num_processed)
		cq->queue->max_num_processed = n_processed;
		telapsed = jiffies_to_msecs(jiffies) - tstart;
		if (telapsed > cq->queue->max_process_time)
		cq->queue->max_process_time = telapsed;
		}

		void
		efct_hw_wq_process(struct efct_hw hw, struct hw_cq cq,
		u8 *cqe, int status, u16 rid)
		{
		struct hw_wq_callback *wqcb;

		if (rid == EFCT_HW_REQUE_XRI_REGTAG) {
		if (status)
		efc_log_err(hw->os, "reque xri failed, status = %d\n",
		status);
		return;
		}

		wqcb = efct_hw_reqtag_get_instance(hw, rid);
		if (!wqcb) {
		efc_log_err(hw->os, "invalid request tag: x%x\n", rid);
		return;
		}

		if (!wqcb->callback) {
		efc_log_err(hw->os, "wqcb callback is NULL\n");
		return;
		}

		(*wqcb->callback)(wqcb->arg, cqe, status);
		}

		void
		efct_hw_xabt_process(struct efct_hw hw, struct hw_cq cq,
		u8 *cqe, u16 rid)
		{
		/* search IOs wait free list */
		struct efct_hw_io *io = NULL;
		unsigned long flags = 0;

		io = efct_hw_io_lookup(hw, rid);
		if (!io) {
		/* IO lookup failure should never happen */
		efc_log_err(hw->os, "xabt io lookup failed rid=%#x\n", rid);
		return;
		}

		if (!io->xbusy)
		efc_log_debug(hw->os, "xabt io not busy rid=%#x\n", rid);
		else
		/* mark IO as no longer busy */
		io->xbusy = false;

		/*
		* For IOs that were aborted internally, we need to issue any pending
		* callback here.
		*/
		if (io->done) {
		efct_hw_done_t done = io->done;
		void *arg = io->arg;

		/*
		* Use latched status as this is always saved for an internal
		* abort
		*/
		int status = io->saved_status;
		u32 len = io->saved_len;
		u32 ext = io->saved_ext;

		io->done = NULL;
		io->status_saved = false;

		done(io, len, status, ext, arg);
		}

		spin_lock_irqsave(&hw->io_lock, flags);
		if (io->state == EFCT_HW_IO_STATE_INUSE \|\|
		io->state == EFCT_HW_IO_STATE_WAIT_FREE) {
		/* if on wait_free list, caller has already freed IO;
		* remove from wait_free list and add to free list.
		* if on in-use list, already marked as no longer busy;
		* just leave there and wait for caller to free.
		*/
		if (io->state == EFCT_HW_IO_STATE_WAIT_FREE) {
		io->state = EFCT_HW_IO_STATE_FREE;
		list_del_init(&io->list_entry);
		efct_hw_io_free_move_correct_list(hw, io);
		}
		}
		spin_unlock_irqrestore(&hw->io_lock, flags);
		}

		static int
		efct_hw_flush(struct efct_hw *hw)
		{
		u32 i = 0;

		/* Process any remaining completions */
		for (i = 0; i < hw->eq_count; i++)
		efct_hw_process(hw, i, ~0);

		return 0;
		}

drivers/scsi/elx/efct/efct_hw.h

+39 −0

Original line number	Diff line number	Diff line
		@@ -652,4 +652,43 @@ efct_hw_reqtag_free(struct efct_hw hw, struct hw_wq_callback wqcb);
		struct hw_wq_callback
		efct_hw_reqtag_get_instance(struct efct_hw hw, u32 instance_index);

		/* RQ completion handlers for RQ pair mode */
		int
		efct_hw_rqpair_process_rq(struct efct_hw *hw,
		struct hw_cq cq, u8 cqe);
		int
		efct_hw_rqpair_sequence_free(struct efct_hw hw, struct efc_hw_sequence seq);
		static inline void
		efct_hw_sequence_copy(struct efc_hw_sequence *dst,
		struct efc_hw_sequence *src)
		{
		/* Copy src to dst, then zero out the linked list link */
		dst = src;
		}

		int
		efct_efc_hw_sequence_free(struct efc efc, struct efc_hw_sequence seq);

		static inline int
		efct_hw_sequence_free(struct efct_hw hw, struct efc_hw_sequence seq)
		{
		/* Only RQ pair mode is supported */
		return efct_hw_rqpair_sequence_free(hw, seq);
		}

		int
		efct_hw_eq_process(struct efct_hw hw, struct hw_eq eq,
		u32 max_isr_time_msec);
		void efct_hw_cq_process(struct efct_hw hw, struct hw_cq cq);
		void
		efct_hw_wq_process(struct efct_hw hw, struct hw_cq cq,
		u8 *cqe, int status, u16 rid);
		void
		efct_hw_xabt_process(struct efct_hw hw, struct hw_cq cq,
		u8 *cqe, u16 rid);
		int
		efct_hw_process(struct efct_hw *hw, u32 vector, u32 max_isr_time_msec);
		int
		efct_hw_queue_hash_find(struct efct_queue_hash *hash, u16 id);

		#endif /* __EFCT_H__ */

drivers/scsi/elx/efct/efct_io.c

0 → 100644

+191 −0

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0
		/*
		* Copyright (C) 2021 Broadcom. All Rights Reserved. The term
		* “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
		*/

		#include "efct_driver.h"
		#include "efct_hw.h"
		#include "efct_io.h"

		struct efct_io_pool {
		struct efct *efct;
		spinlock_t lock; /* IO pool lock */
		u32 io_num_ios; /* Total IOs allocated */
		struct efct_io *ios[EFCT_NUM_SCSI_IOS];
		struct list_head freelist;

		};

		struct efct_io_pool *
		efct_io_pool_create(struct efct *efct, u32 num_sgl)
		{
		u32 i = 0;
		struct efct_io_pool *io_pool;
		struct efct_io *io;

		/* Allocate the IO pool */
		io_pool = kzalloc(sizeof(*io_pool), GFP_KERNEL);
		if (!io_pool)
		return NULL;

		io_pool->efct = efct;
		INIT_LIST_HEAD(&io_pool->freelist);
		/* initialize IO pool lock */
		spin_lock_init(&io_pool->lock);

		for (i = 0; i < EFCT_NUM_SCSI_IOS; i++) {
		io = kzalloc(sizeof(*io), GFP_KERNEL);
		if (!io)
		break;

		io_pool->io_num_ios++;
		io_pool->ios[i] = io;
		io->tag = i;
		io->instance_index = i;

		/* Allocate a response buffer */
		io->rspbuf.size = SCSI_RSP_BUF_LENGTH;
		io->rspbuf.virt = dma_alloc_coherent(&efct->pci->dev,
		io->rspbuf.size,
		&io->rspbuf.phys, GFP_DMA);
		if (!io->rspbuf.virt) {
		efc_log_err(efct, "dma_alloc rspbuf failed\n");
		efct_io_pool_free(io_pool);
		return NULL;
		}

		/* Allocate SGL */
		io->sgl = kzalloc(sizeof(io->sgl) num_sgl, GFP_KERNEL);
		if (!io->sgl) {
		efct_io_pool_free(io_pool);
		return NULL;
		}

		memset(io->sgl, 0, sizeof(io->sgl) num_sgl);
		io->sgl_allocated = num_sgl;
		io->sgl_count = 0;

		INIT_LIST_HEAD(&io->list_entry);
		list_add_tail(&io->list_entry, &io_pool->freelist);
		}

		return io_pool;
		}

		int
		efct_io_pool_free(struct efct_io_pool *io_pool)
		{
		struct efct *efct;
		u32 i;
		struct efct_io *io;

		if (io_pool) {
		efct = io_pool->efct;

		for (i = 0; i < io_pool->io_num_ios; i++) {
		io = io_pool->ios[i];
		if (!io)
		continue;

		kfree(io->sgl);
		dma_free_coherent(&efct->pci->dev,
		io->rspbuf.size, io->rspbuf.virt,
		io->rspbuf.phys);
		memset(&io->rspbuf, 0, sizeof(struct efc_dma));
		}

		kfree(io_pool);
		efct->xport->io_pool = NULL;
		}

		return 0;
		}

		struct efct_io *
		efct_io_pool_io_alloc(struct efct_io_pool *io_pool)
		{
		struct efct_io *io = NULL;
		struct efct *efct;
		unsigned long flags = 0;

		efct = io_pool->efct;

		spin_lock_irqsave(&io_pool->lock, flags);

		if (!list_empty(&io_pool->freelist)) {
		io = list_first_entry(&io_pool->freelist, struct efct_io,
		list_entry);
		list_del_init(&io->list_entry);
		}

		spin_unlock_irqrestore(&io_pool->lock, flags);

		if (!io)
		return NULL;

		io->io_type = EFCT_IO_TYPE_MAX;
		io->hio_type = EFCT_HW_IO_MAX;
		io->hio = NULL;
		io->transferred = 0;
		io->efct = efct;
		io->timeout = 0;
		io->sgl_count = 0;
		io->tgt_task_tag = 0;
		io->init_task_tag = 0;
		io->hw_tag = 0;
		io->display_name = "pending";
		io->seq_init = 0;
		io->io_free = 0;
		io->release = NULL;
		atomic_add_return(1, &efct->xport->io_active_count);
		atomic_add_return(1, &efct->xport->io_total_alloc);
		return io;
		}

		/* Free an object used to track an IO */
		void
		efct_io_pool_io_free(struct efct_io_pool io_pool, struct efct_io io)
		{
		struct efct *efct;
		struct efct_hw_io *hio = NULL;
		unsigned long flags = 0;

		efct = io_pool->efct;

		spin_lock_irqsave(&io_pool->lock, flags);
		hio = io->hio;
		io->hio = NULL;
		io->io_free = 1;
		INIT_LIST_HEAD(&io->list_entry);
		list_add(&io->list_entry, &io_pool->freelist);
		spin_unlock_irqrestore(&io_pool->lock, flags);

		if (hio)
		efct_hw_io_free(&efct->hw, hio);

		atomic_sub_return(1, &efct->xport->io_active_count);
		atomic_add_return(1, &efct->xport->io_total_free);
		}

		/* Find an I/O given it's node and ox_id */
		struct efct_io *
		efct_io_find_tgt_io(struct efct efct, struct efct_node node,
		u16 ox_id, u16 rx_id)
		{
		struct efct_io *io = NULL;
		unsigned long flags = 0;
		u8 found = false;

		spin_lock_irqsave(&node->active_ios_lock, flags);
		list_for_each_entry(io, &node->active_ios, list_entry) {
		if ((io->cmd_tgt && io->init_task_tag == ox_id) &&
		(rx_id == 0xffff \|\| io->tgt_task_tag == rx_id)) {
		if (kref_get_unless_zero(&io->ref))
		found = true;
		break;
		}
		}
		spin_unlock_irqrestore(&node->active_ios_lock, flags);
		return found ? io : NULL;
		}

drivers/scsi/elx/efct/efct_io.h

0 → 100644

+174 −0

Original line number	Diff line number	Diff line
		/* 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__ */