2625 lines
72 KiB
C
2625 lines
72 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* QLogic FCoE Offload Driver
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* Copyright (c) 2016-2018 Cavium Inc.
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*/
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#include <linux/spinlock.h>
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#include <linux/vmalloc.h>
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#include "qedf.h"
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#include <scsi/scsi_tcq.h>
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void qedf_cmd_timer_set(struct qedf_ctx *qedf, struct qedf_ioreq *io_req,
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unsigned int timer_msec)
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{
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queue_delayed_work(qedf->timer_work_queue, &io_req->timeout_work,
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msecs_to_jiffies(timer_msec));
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}
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static void qedf_cmd_timeout(struct work_struct *work)
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{
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struct qedf_ioreq *io_req =
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container_of(work, struct qedf_ioreq, timeout_work.work);
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struct qedf_ctx *qedf;
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struct qedf_rport *fcport;
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fcport = io_req->fcport;
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if (io_req->fcport == NULL) {
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QEDF_INFO(NULL, QEDF_LOG_IO, "fcport is NULL.\n");
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return;
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}
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qedf = fcport->qedf;
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switch (io_req->cmd_type) {
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case QEDF_ABTS:
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if (qedf == NULL) {
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QEDF_INFO(NULL, QEDF_LOG_IO,
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"qedf is NULL for ABTS xid=0x%x.\n",
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io_req->xid);
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return;
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}
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QEDF_ERR((&qedf->dbg_ctx), "ABTS timeout, xid=0x%x.\n",
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io_req->xid);
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/* Cleanup timed out ABTS */
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qedf_initiate_cleanup(io_req, true);
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complete(&io_req->abts_done);
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/*
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* Need to call kref_put for reference taken when initiate_abts
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* was called since abts_compl won't be called now that we've
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* cleaned up the task.
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*/
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kref_put(&io_req->refcount, qedf_release_cmd);
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/* Clear in abort bit now that we're done with the command */
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clear_bit(QEDF_CMD_IN_ABORT, &io_req->flags);
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/*
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* Now that the original I/O and the ABTS are complete see
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* if we need to reconnect to the target.
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*/
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qedf_restart_rport(fcport);
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break;
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case QEDF_ELS:
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if (!qedf) {
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QEDF_INFO(NULL, QEDF_LOG_IO,
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"qedf is NULL for ELS xid=0x%x.\n",
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io_req->xid);
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return;
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}
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/* ELS request no longer outstanding since it timed out */
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clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags);
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kref_get(&io_req->refcount);
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/*
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* Don't attempt to clean an ELS timeout as any subseqeunt
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* ABTS or cleanup requests just hang. For now just free
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* the resources of the original I/O and the RRQ
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*/
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QEDF_ERR(&(qedf->dbg_ctx), "ELS timeout, xid=0x%x.\n",
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io_req->xid);
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qedf_initiate_cleanup(io_req, true);
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io_req->event = QEDF_IOREQ_EV_ELS_TMO;
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/* Call callback function to complete command */
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if (io_req->cb_func && io_req->cb_arg) {
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io_req->cb_func(io_req->cb_arg);
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io_req->cb_arg = NULL;
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}
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kref_put(&io_req->refcount, qedf_release_cmd);
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break;
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case QEDF_SEQ_CLEANUP:
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QEDF_ERR(&(qedf->dbg_ctx), "Sequence cleanup timeout, "
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"xid=0x%x.\n", io_req->xid);
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qedf_initiate_cleanup(io_req, true);
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io_req->event = QEDF_IOREQ_EV_ELS_TMO;
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qedf_process_seq_cleanup_compl(qedf, NULL, io_req);
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break;
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default:
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QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO,
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"Hit default case, xid=0x%x.\n", io_req->xid);
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break;
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}
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}
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void qedf_cmd_mgr_free(struct qedf_cmd_mgr *cmgr)
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{
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struct io_bdt *bdt_info;
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struct qedf_ctx *qedf = cmgr->qedf;
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size_t bd_tbl_sz;
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u16 min_xid = 0;
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u16 max_xid = (FCOE_PARAMS_NUM_TASKS - 1);
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int num_ios;
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int i;
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struct qedf_ioreq *io_req;
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num_ios = max_xid - min_xid + 1;
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/* Free fcoe_bdt_ctx structures */
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if (!cmgr->io_bdt_pool) {
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QEDF_ERR(&qedf->dbg_ctx, "io_bdt_pool is NULL.\n");
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goto free_cmd_pool;
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}
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bd_tbl_sz = QEDF_MAX_BDS_PER_CMD * sizeof(struct scsi_sge);
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for (i = 0; i < num_ios; i++) {
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bdt_info = cmgr->io_bdt_pool[i];
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if (bdt_info->bd_tbl) {
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dma_free_coherent(&qedf->pdev->dev, bd_tbl_sz,
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bdt_info->bd_tbl, bdt_info->bd_tbl_dma);
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bdt_info->bd_tbl = NULL;
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}
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}
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/* Destroy io_bdt pool */
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for (i = 0; i < num_ios; i++) {
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kfree(cmgr->io_bdt_pool[i]);
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cmgr->io_bdt_pool[i] = NULL;
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}
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kfree(cmgr->io_bdt_pool);
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cmgr->io_bdt_pool = NULL;
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free_cmd_pool:
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for (i = 0; i < num_ios; i++) {
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io_req = &cmgr->cmds[i];
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kfree(io_req->sgl_task_params);
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kfree(io_req->task_params);
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/* Make sure we free per command sense buffer */
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if (io_req->sense_buffer)
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dma_free_coherent(&qedf->pdev->dev,
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QEDF_SCSI_SENSE_BUFFERSIZE, io_req->sense_buffer,
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io_req->sense_buffer_dma);
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cancel_delayed_work_sync(&io_req->rrq_work);
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}
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/* Free command manager itself */
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vfree(cmgr);
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}
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static void qedf_handle_rrq(struct work_struct *work)
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{
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struct qedf_ioreq *io_req =
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container_of(work, struct qedf_ioreq, rrq_work.work);
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atomic_set(&io_req->state, QEDFC_CMD_ST_RRQ_ACTIVE);
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qedf_send_rrq(io_req);
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}
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struct qedf_cmd_mgr *qedf_cmd_mgr_alloc(struct qedf_ctx *qedf)
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{
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struct qedf_cmd_mgr *cmgr;
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struct io_bdt *bdt_info;
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struct qedf_ioreq *io_req;
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u16 xid;
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int i;
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int num_ios;
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u16 min_xid = 0;
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u16 max_xid = (FCOE_PARAMS_NUM_TASKS - 1);
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/* Make sure num_queues is already set before calling this function */
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if (!qedf->num_queues) {
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QEDF_ERR(&(qedf->dbg_ctx), "num_queues is not set.\n");
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return NULL;
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}
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if (max_xid <= min_xid || max_xid == FC_XID_UNKNOWN) {
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QEDF_WARN(&(qedf->dbg_ctx), "Invalid min_xid 0x%x and "
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"max_xid 0x%x.\n", min_xid, max_xid);
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return NULL;
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}
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QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "min xid 0x%x, max xid "
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"0x%x.\n", min_xid, max_xid);
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num_ios = max_xid - min_xid + 1;
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cmgr = vzalloc(sizeof(struct qedf_cmd_mgr));
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if (!cmgr) {
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QEDF_WARN(&(qedf->dbg_ctx), "Failed to alloc cmd mgr.\n");
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return NULL;
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}
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cmgr->qedf = qedf;
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spin_lock_init(&cmgr->lock);
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/*
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* Initialize I/O request fields.
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*/
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xid = 0;
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for (i = 0; i < num_ios; i++) {
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io_req = &cmgr->cmds[i];
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INIT_DELAYED_WORK(&io_req->timeout_work, qedf_cmd_timeout);
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io_req->xid = xid++;
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INIT_DELAYED_WORK(&io_req->rrq_work, qedf_handle_rrq);
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/* Allocate DMA memory to hold sense buffer */
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io_req->sense_buffer = dma_alloc_coherent(&qedf->pdev->dev,
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QEDF_SCSI_SENSE_BUFFERSIZE, &io_req->sense_buffer_dma,
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GFP_KERNEL);
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if (!io_req->sense_buffer) {
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QEDF_ERR(&qedf->dbg_ctx,
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"Failed to alloc sense buffer.\n");
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goto mem_err;
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}
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/* Allocate task parameters to pass to f/w init funcions */
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io_req->task_params = kzalloc(sizeof(*io_req->task_params),
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GFP_KERNEL);
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if (!io_req->task_params) {
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QEDF_ERR(&(qedf->dbg_ctx),
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"Failed to allocate task_params for xid=0x%x\n",
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i);
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goto mem_err;
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}
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/*
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* Allocate scatter/gather list info to pass to f/w init
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* functions.
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*/
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io_req->sgl_task_params = kzalloc(
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sizeof(struct scsi_sgl_task_params), GFP_KERNEL);
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if (!io_req->sgl_task_params) {
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QEDF_ERR(&(qedf->dbg_ctx),
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"Failed to allocate sgl_task_params for xid=0x%x\n",
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i);
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goto mem_err;
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}
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}
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/* Allocate pool of io_bdts - one for each qedf_ioreq */
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cmgr->io_bdt_pool = kmalloc_array(num_ios, sizeof(struct io_bdt *),
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GFP_KERNEL);
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if (!cmgr->io_bdt_pool) {
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QEDF_WARN(&(qedf->dbg_ctx), "Failed to alloc io_bdt_pool.\n");
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goto mem_err;
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}
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for (i = 0; i < num_ios; i++) {
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cmgr->io_bdt_pool[i] = kmalloc(sizeof(struct io_bdt),
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GFP_KERNEL);
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if (!cmgr->io_bdt_pool[i]) {
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QEDF_WARN(&(qedf->dbg_ctx),
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"Failed to alloc io_bdt_pool[%d].\n", i);
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goto mem_err;
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}
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}
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for (i = 0; i < num_ios; i++) {
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bdt_info = cmgr->io_bdt_pool[i];
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bdt_info->bd_tbl = dma_alloc_coherent(&qedf->pdev->dev,
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QEDF_MAX_BDS_PER_CMD * sizeof(struct scsi_sge),
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&bdt_info->bd_tbl_dma, GFP_KERNEL);
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if (!bdt_info->bd_tbl) {
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QEDF_WARN(&(qedf->dbg_ctx),
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"Failed to alloc bdt_tbl[%d].\n", i);
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goto mem_err;
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}
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}
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atomic_set(&cmgr->free_list_cnt, num_ios);
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QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
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"cmgr->free_list_cnt=%d.\n",
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atomic_read(&cmgr->free_list_cnt));
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return cmgr;
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mem_err:
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qedf_cmd_mgr_free(cmgr);
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return NULL;
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}
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struct qedf_ioreq *qedf_alloc_cmd(struct qedf_rport *fcport, u8 cmd_type)
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{
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struct qedf_ctx *qedf = fcport->qedf;
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struct qedf_cmd_mgr *cmd_mgr = qedf->cmd_mgr;
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struct qedf_ioreq *io_req = NULL;
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struct io_bdt *bd_tbl;
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u16 xid;
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uint32_t free_sqes;
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int i;
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unsigned long flags;
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free_sqes = atomic_read(&fcport->free_sqes);
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if (!free_sqes) {
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QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
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"Returning NULL, free_sqes=%d.\n ",
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free_sqes);
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goto out_failed;
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}
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/* Limit the number of outstanding R/W tasks */
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if ((atomic_read(&fcport->num_active_ios) >=
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NUM_RW_TASKS_PER_CONNECTION)) {
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QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
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"Returning NULL, num_active_ios=%d.\n",
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atomic_read(&fcport->num_active_ios));
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goto out_failed;
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}
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/* Limit global TIDs certain tasks */
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if (atomic_read(&cmd_mgr->free_list_cnt) <= GBL_RSVD_TASKS) {
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QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
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"Returning NULL, free_list_cnt=%d.\n",
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atomic_read(&cmd_mgr->free_list_cnt));
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goto out_failed;
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}
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spin_lock_irqsave(&cmd_mgr->lock, flags);
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for (i = 0; i < FCOE_PARAMS_NUM_TASKS; i++) {
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io_req = &cmd_mgr->cmds[cmd_mgr->idx];
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cmd_mgr->idx++;
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if (cmd_mgr->idx == FCOE_PARAMS_NUM_TASKS)
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cmd_mgr->idx = 0;
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/* Check to make sure command was previously freed */
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if (!io_req->alloc)
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break;
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}
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if (i == FCOE_PARAMS_NUM_TASKS) {
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spin_unlock_irqrestore(&cmd_mgr->lock, flags);
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goto out_failed;
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}
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if (test_bit(QEDF_CMD_DIRTY, &io_req->flags))
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QEDF_ERR(&qedf->dbg_ctx,
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"io_req found to be dirty ox_id = 0x%x.\n",
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io_req->xid);
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/* Clear any flags now that we've reallocated the xid */
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io_req->flags = 0;
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io_req->alloc = 1;
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spin_unlock_irqrestore(&cmd_mgr->lock, flags);
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atomic_inc(&fcport->num_active_ios);
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atomic_dec(&fcport->free_sqes);
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xid = io_req->xid;
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atomic_dec(&cmd_mgr->free_list_cnt);
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io_req->cmd_mgr = cmd_mgr;
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io_req->fcport = fcport;
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/* Clear any stale sc_cmd back pointer */
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io_req->sc_cmd = NULL;
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io_req->lun = -1;
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/* Hold the io_req against deletion */
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kref_init(&io_req->refcount); /* ID: 001 */
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atomic_set(&io_req->state, QEDFC_CMD_ST_IO_ACTIVE);
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/* Bind io_bdt for this io_req */
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/* Have a static link between io_req and io_bdt_pool */
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bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid];
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if (bd_tbl == NULL) {
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QEDF_ERR(&(qedf->dbg_ctx), "bd_tbl is NULL, xid=%x.\n", xid);
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kref_put(&io_req->refcount, qedf_release_cmd);
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goto out_failed;
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}
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bd_tbl->io_req = io_req;
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io_req->cmd_type = cmd_type;
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io_req->tm_flags = 0;
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|
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/* Reset sequence offset data */
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io_req->rx_buf_off = 0;
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io_req->tx_buf_off = 0;
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io_req->rx_id = 0xffff; /* No OX_ID */
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|
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return io_req;
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|
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out_failed:
|
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/* Record failure for stats and return NULL to caller */
|
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qedf->alloc_failures++;
|
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return NULL;
|
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}
|
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|
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static void qedf_free_mp_resc(struct qedf_ioreq *io_req)
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{
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struct qedf_mp_req *mp_req = &(io_req->mp_req);
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struct qedf_ctx *qedf = io_req->fcport->qedf;
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uint64_t sz = sizeof(struct scsi_sge);
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|
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/* clear tm flags */
|
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if (mp_req->mp_req_bd) {
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dma_free_coherent(&qedf->pdev->dev, sz,
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mp_req->mp_req_bd, mp_req->mp_req_bd_dma);
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mp_req->mp_req_bd = NULL;
|
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}
|
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if (mp_req->mp_resp_bd) {
|
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dma_free_coherent(&qedf->pdev->dev, sz,
|
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mp_req->mp_resp_bd, mp_req->mp_resp_bd_dma);
|
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mp_req->mp_resp_bd = NULL;
|
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}
|
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if (mp_req->req_buf) {
|
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dma_free_coherent(&qedf->pdev->dev, QEDF_PAGE_SIZE,
|
|
mp_req->req_buf, mp_req->req_buf_dma);
|
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mp_req->req_buf = NULL;
|
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}
|
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if (mp_req->resp_buf) {
|
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dma_free_coherent(&qedf->pdev->dev, QEDF_PAGE_SIZE,
|
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mp_req->resp_buf, mp_req->resp_buf_dma);
|
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mp_req->resp_buf = NULL;
|
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}
|
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}
|
|
|
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void qedf_release_cmd(struct kref *ref)
|
|
{
|
|
struct qedf_ioreq *io_req =
|
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container_of(ref, struct qedf_ioreq, refcount);
|
|
struct qedf_cmd_mgr *cmd_mgr = io_req->cmd_mgr;
|
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struct qedf_rport *fcport = io_req->fcport;
|
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unsigned long flags;
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|
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if (io_req->cmd_type == QEDF_SCSI_CMD) {
|
|
QEDF_WARN(&fcport->qedf->dbg_ctx,
|
|
"Cmd released called without scsi_done called, io_req %p xid=0x%x.\n",
|
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io_req, io_req->xid);
|
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WARN_ON(io_req->sc_cmd);
|
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}
|
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|
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if (io_req->cmd_type == QEDF_ELS ||
|
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io_req->cmd_type == QEDF_TASK_MGMT_CMD)
|
|
qedf_free_mp_resc(io_req);
|
|
|
|
atomic_inc(&cmd_mgr->free_list_cnt);
|
|
atomic_dec(&fcport->num_active_ios);
|
|
atomic_set(&io_req->state, QEDF_CMD_ST_INACTIVE);
|
|
if (atomic_read(&fcport->num_active_ios) < 0) {
|
|
QEDF_WARN(&(fcport->qedf->dbg_ctx), "active_ios < 0.\n");
|
|
WARN_ON(1);
|
|
}
|
|
|
|
/* Increment task retry identifier now that the request is released */
|
|
io_req->task_retry_identifier++;
|
|
io_req->fcport = NULL;
|
|
|
|
clear_bit(QEDF_CMD_DIRTY, &io_req->flags);
|
|
io_req->cpu = 0;
|
|
spin_lock_irqsave(&cmd_mgr->lock, flags);
|
|
io_req->fcport = NULL;
|
|
io_req->alloc = 0;
|
|
spin_unlock_irqrestore(&cmd_mgr->lock, flags);
|
|
}
|
|
|
|
static int qedf_map_sg(struct qedf_ioreq *io_req)
|
|
{
|
|
struct scsi_cmnd *sc = io_req->sc_cmd;
|
|
struct Scsi_Host *host = sc->device->host;
|
|
struct fc_lport *lport = shost_priv(host);
|
|
struct qedf_ctx *qedf = lport_priv(lport);
|
|
struct scsi_sge *bd = io_req->bd_tbl->bd_tbl;
|
|
struct scatterlist *sg;
|
|
int byte_count = 0;
|
|
int sg_count = 0;
|
|
int bd_count = 0;
|
|
u32 sg_len;
|
|
u64 addr;
|
|
int i = 0;
|
|
|
|
sg_count = dma_map_sg(&qedf->pdev->dev, scsi_sglist(sc),
|
|
scsi_sg_count(sc), sc->sc_data_direction);
|
|
sg = scsi_sglist(sc);
|
|
|
|
io_req->sge_type = QEDF_IOREQ_UNKNOWN_SGE;
|
|
|
|
if (sg_count <= 8 || io_req->io_req_flags == QEDF_READ)
|
|
io_req->sge_type = QEDF_IOREQ_FAST_SGE;
|
|
|
|
scsi_for_each_sg(sc, sg, sg_count, i) {
|
|
sg_len = (u32)sg_dma_len(sg);
|
|
addr = (u64)sg_dma_address(sg);
|
|
|
|
/*
|
|
* Intermediate s/g element so check if start address
|
|
* is page aligned. Only required for writes and only if the
|
|
* number of scatter/gather elements is 8 or more.
|
|
*/
|
|
if (io_req->sge_type == QEDF_IOREQ_UNKNOWN_SGE && (i) &&
|
|
(i != (sg_count - 1)) && sg_len < QEDF_PAGE_SIZE)
|
|
io_req->sge_type = QEDF_IOREQ_SLOW_SGE;
|
|
|
|
bd[bd_count].sge_addr.lo = cpu_to_le32(U64_LO(addr));
|
|
bd[bd_count].sge_addr.hi = cpu_to_le32(U64_HI(addr));
|
|
bd[bd_count].sge_len = cpu_to_le32(sg_len);
|
|
|
|
bd_count++;
|
|
byte_count += sg_len;
|
|
}
|
|
|
|
/* To catch a case where FAST and SLOW nothing is set, set FAST */
|
|
if (io_req->sge_type == QEDF_IOREQ_UNKNOWN_SGE)
|
|
io_req->sge_type = QEDF_IOREQ_FAST_SGE;
|
|
|
|
if (byte_count != scsi_bufflen(sc))
|
|
QEDF_ERR(&(qedf->dbg_ctx), "byte_count = %d != "
|
|
"scsi_bufflen = %d, task_id = 0x%x.\n", byte_count,
|
|
scsi_bufflen(sc), io_req->xid);
|
|
|
|
return bd_count;
|
|
}
|
|
|
|
static int qedf_build_bd_list_from_sg(struct qedf_ioreq *io_req)
|
|
{
|
|
struct scsi_cmnd *sc = io_req->sc_cmd;
|
|
struct scsi_sge *bd = io_req->bd_tbl->bd_tbl;
|
|
int bd_count;
|
|
|
|
if (scsi_sg_count(sc)) {
|
|
bd_count = qedf_map_sg(io_req);
|
|
if (bd_count == 0)
|
|
return -ENOMEM;
|
|
} else {
|
|
bd_count = 0;
|
|
bd[0].sge_addr.lo = bd[0].sge_addr.hi = 0;
|
|
bd[0].sge_len = 0;
|
|
}
|
|
io_req->bd_tbl->bd_valid = bd_count;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void qedf_build_fcp_cmnd(struct qedf_ioreq *io_req,
|
|
struct fcp_cmnd *fcp_cmnd)
|
|
{
|
|
struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
|
|
|
|
/* fcp_cmnd is 32 bytes */
|
|
memset(fcp_cmnd, 0, FCP_CMND_LEN);
|
|
|
|
/* 8 bytes: SCSI LUN info */
|
|
int_to_scsilun(sc_cmd->device->lun,
|
|
(struct scsi_lun *)&fcp_cmnd->fc_lun);
|
|
|
|
/* 4 bytes: flag info */
|
|
fcp_cmnd->fc_pri_ta = 0;
|
|
fcp_cmnd->fc_tm_flags = io_req->tm_flags;
|
|
fcp_cmnd->fc_flags = io_req->io_req_flags;
|
|
fcp_cmnd->fc_cmdref = 0;
|
|
|
|
/* Populate data direction */
|
|
if (io_req->cmd_type == QEDF_TASK_MGMT_CMD) {
|
|
fcp_cmnd->fc_flags |= FCP_CFL_RDDATA;
|
|
} else {
|
|
if (sc_cmd->sc_data_direction == DMA_TO_DEVICE)
|
|
fcp_cmnd->fc_flags |= FCP_CFL_WRDATA;
|
|
else if (sc_cmd->sc_data_direction == DMA_FROM_DEVICE)
|
|
fcp_cmnd->fc_flags |= FCP_CFL_RDDATA;
|
|
}
|
|
|
|
fcp_cmnd->fc_pri_ta = FCP_PTA_SIMPLE;
|
|
|
|
/* 16 bytes: CDB information */
|
|
if (io_req->cmd_type != QEDF_TASK_MGMT_CMD)
|
|
memcpy(fcp_cmnd->fc_cdb, sc_cmd->cmnd, sc_cmd->cmd_len);
|
|
|
|
/* 4 bytes: FCP data length */
|
|
fcp_cmnd->fc_dl = htonl(io_req->data_xfer_len);
|
|
}
|
|
|
|
static void qedf_init_task(struct qedf_rport *fcport, struct fc_lport *lport,
|
|
struct qedf_ioreq *io_req, struct fcoe_task_context *task_ctx,
|
|
struct fcoe_wqe *sqe)
|
|
{
|
|
enum fcoe_task_type task_type;
|
|
struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
|
|
struct io_bdt *bd_tbl = io_req->bd_tbl;
|
|
u8 fcp_cmnd[32];
|
|
u32 tmp_fcp_cmnd[8];
|
|
int bd_count = 0;
|
|
struct qedf_ctx *qedf = fcport->qedf;
|
|
uint16_t cq_idx = smp_processor_id() % qedf->num_queues;
|
|
struct regpair sense_data_buffer_phys_addr;
|
|
u32 tx_io_size = 0;
|
|
u32 rx_io_size = 0;
|
|
int i, cnt;
|
|
|
|
/* Note init_initiator_rw_fcoe_task memsets the task context */
|
|
io_req->task = task_ctx;
|
|
memset(task_ctx, 0, sizeof(struct fcoe_task_context));
|
|
memset(io_req->task_params, 0, sizeof(struct fcoe_task_params));
|
|
memset(io_req->sgl_task_params, 0, sizeof(struct scsi_sgl_task_params));
|
|
|
|
/* Set task type bassed on DMA directio of command */
|
|
if (io_req->cmd_type == QEDF_TASK_MGMT_CMD) {
|
|
task_type = FCOE_TASK_TYPE_READ_INITIATOR;
|
|
} else {
|
|
if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) {
|
|
task_type = FCOE_TASK_TYPE_WRITE_INITIATOR;
|
|
tx_io_size = io_req->data_xfer_len;
|
|
} else {
|
|
task_type = FCOE_TASK_TYPE_READ_INITIATOR;
|
|
rx_io_size = io_req->data_xfer_len;
|
|
}
|
|
}
|
|
|
|
/* Setup the fields for fcoe_task_params */
|
|
io_req->task_params->context = task_ctx;
|
|
io_req->task_params->sqe = sqe;
|
|
io_req->task_params->task_type = task_type;
|
|
io_req->task_params->tx_io_size = tx_io_size;
|
|
io_req->task_params->rx_io_size = rx_io_size;
|
|
io_req->task_params->conn_cid = fcport->fw_cid;
|
|
io_req->task_params->itid = io_req->xid;
|
|
io_req->task_params->cq_rss_number = cq_idx;
|
|
io_req->task_params->is_tape_device = fcport->dev_type;
|
|
|
|
/* Fill in information for scatter/gather list */
|
|
if (io_req->cmd_type != QEDF_TASK_MGMT_CMD) {
|
|
bd_count = bd_tbl->bd_valid;
|
|
io_req->sgl_task_params->sgl = bd_tbl->bd_tbl;
|
|
io_req->sgl_task_params->sgl_phys_addr.lo =
|
|
U64_LO(bd_tbl->bd_tbl_dma);
|
|
io_req->sgl_task_params->sgl_phys_addr.hi =
|
|
U64_HI(bd_tbl->bd_tbl_dma);
|
|
io_req->sgl_task_params->num_sges = bd_count;
|
|
io_req->sgl_task_params->total_buffer_size =
|
|
scsi_bufflen(io_req->sc_cmd);
|
|
if (io_req->sge_type == QEDF_IOREQ_SLOW_SGE)
|
|
io_req->sgl_task_params->small_mid_sge = 1;
|
|
else
|
|
io_req->sgl_task_params->small_mid_sge = 0;
|
|
}
|
|
|
|
/* Fill in physical address of sense buffer */
|
|
sense_data_buffer_phys_addr.lo = U64_LO(io_req->sense_buffer_dma);
|
|
sense_data_buffer_phys_addr.hi = U64_HI(io_req->sense_buffer_dma);
|
|
|
|
/* fill FCP_CMND IU */
|
|
qedf_build_fcp_cmnd(io_req, (struct fcp_cmnd *)tmp_fcp_cmnd);
|
|
|
|
/* Swap fcp_cmnd since FC is big endian */
|
|
cnt = sizeof(struct fcp_cmnd) / sizeof(u32);
|
|
for (i = 0; i < cnt; i++) {
|
|
tmp_fcp_cmnd[i] = cpu_to_be32(tmp_fcp_cmnd[i]);
|
|
}
|
|
memcpy(fcp_cmnd, tmp_fcp_cmnd, sizeof(struct fcp_cmnd));
|
|
|
|
init_initiator_rw_fcoe_task(io_req->task_params,
|
|
io_req->sgl_task_params,
|
|
sense_data_buffer_phys_addr,
|
|
io_req->task_retry_identifier, fcp_cmnd);
|
|
|
|
/* Increment SGL type counters */
|
|
if (io_req->sge_type == QEDF_IOREQ_SLOW_SGE)
|
|
qedf->slow_sge_ios++;
|
|
else
|
|
qedf->fast_sge_ios++;
|
|
}
|
|
|
|
void qedf_init_mp_task(struct qedf_ioreq *io_req,
|
|
struct fcoe_task_context *task_ctx, struct fcoe_wqe *sqe)
|
|
{
|
|
struct qedf_mp_req *mp_req = &(io_req->mp_req);
|
|
struct qedf_rport *fcport = io_req->fcport;
|
|
struct qedf_ctx *qedf = io_req->fcport->qedf;
|
|
struct fc_frame_header *fc_hdr;
|
|
struct fcoe_tx_mid_path_params task_fc_hdr;
|
|
struct scsi_sgl_task_params tx_sgl_task_params;
|
|
struct scsi_sgl_task_params rx_sgl_task_params;
|
|
|
|
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
|
|
"Initializing MP task for cmd_type=%d\n",
|
|
io_req->cmd_type);
|
|
|
|
qedf->control_requests++;
|
|
|
|
memset(&tx_sgl_task_params, 0, sizeof(struct scsi_sgl_task_params));
|
|
memset(&rx_sgl_task_params, 0, sizeof(struct scsi_sgl_task_params));
|
|
memset(task_ctx, 0, sizeof(struct fcoe_task_context));
|
|
memset(&task_fc_hdr, 0, sizeof(struct fcoe_tx_mid_path_params));
|
|
|
|
/* Setup the task from io_req for easy reference */
|
|
io_req->task = task_ctx;
|
|
|
|
/* Setup the fields for fcoe_task_params */
|
|
io_req->task_params->context = task_ctx;
|
|
io_req->task_params->sqe = sqe;
|
|
io_req->task_params->task_type = FCOE_TASK_TYPE_MIDPATH;
|
|
io_req->task_params->tx_io_size = io_req->data_xfer_len;
|
|
/* rx_io_size tells the f/w how large a response buffer we have */
|
|
io_req->task_params->rx_io_size = PAGE_SIZE;
|
|
io_req->task_params->conn_cid = fcport->fw_cid;
|
|
io_req->task_params->itid = io_req->xid;
|
|
/* Return middle path commands on CQ 0 */
|
|
io_req->task_params->cq_rss_number = 0;
|
|
io_req->task_params->is_tape_device = fcport->dev_type;
|
|
|
|
fc_hdr = &(mp_req->req_fc_hdr);
|
|
/* Set OX_ID and RX_ID based on driver task id */
|
|
fc_hdr->fh_ox_id = io_req->xid;
|
|
fc_hdr->fh_rx_id = htons(0xffff);
|
|
|
|
/* Set up FC header information */
|
|
task_fc_hdr.parameter = fc_hdr->fh_parm_offset;
|
|
task_fc_hdr.r_ctl = fc_hdr->fh_r_ctl;
|
|
task_fc_hdr.type = fc_hdr->fh_type;
|
|
task_fc_hdr.cs_ctl = fc_hdr->fh_cs_ctl;
|
|
task_fc_hdr.df_ctl = fc_hdr->fh_df_ctl;
|
|
task_fc_hdr.rx_id = fc_hdr->fh_rx_id;
|
|
task_fc_hdr.ox_id = fc_hdr->fh_ox_id;
|
|
|
|
/* Set up s/g list parameters for request buffer */
|
|
tx_sgl_task_params.sgl = mp_req->mp_req_bd;
|
|
tx_sgl_task_params.sgl_phys_addr.lo = U64_LO(mp_req->mp_req_bd_dma);
|
|
tx_sgl_task_params.sgl_phys_addr.hi = U64_HI(mp_req->mp_req_bd_dma);
|
|
tx_sgl_task_params.num_sges = 1;
|
|
/* Set PAGE_SIZE for now since sg element is that size ??? */
|
|
tx_sgl_task_params.total_buffer_size = io_req->data_xfer_len;
|
|
tx_sgl_task_params.small_mid_sge = 0;
|
|
|
|
/* Set up s/g list parameters for request buffer */
|
|
rx_sgl_task_params.sgl = mp_req->mp_resp_bd;
|
|
rx_sgl_task_params.sgl_phys_addr.lo = U64_LO(mp_req->mp_resp_bd_dma);
|
|
rx_sgl_task_params.sgl_phys_addr.hi = U64_HI(mp_req->mp_resp_bd_dma);
|
|
rx_sgl_task_params.num_sges = 1;
|
|
/* Set PAGE_SIZE for now since sg element is that size ??? */
|
|
rx_sgl_task_params.total_buffer_size = PAGE_SIZE;
|
|
rx_sgl_task_params.small_mid_sge = 0;
|
|
|
|
|
|
/*
|
|
* Last arg is 0 as previous code did not set that we wanted the
|
|
* fc header information.
|
|
*/
|
|
init_initiator_midpath_unsolicited_fcoe_task(io_req->task_params,
|
|
&task_fc_hdr,
|
|
&tx_sgl_task_params,
|
|
&rx_sgl_task_params, 0);
|
|
}
|
|
|
|
/* Presumed that fcport->rport_lock is held */
|
|
u16 qedf_get_sqe_idx(struct qedf_rport *fcport)
|
|
{
|
|
uint16_t total_sqe = (fcport->sq_mem_size)/(sizeof(struct fcoe_wqe));
|
|
u16 rval;
|
|
|
|
rval = fcport->sq_prod_idx;
|
|
|
|
/* Adjust ring index */
|
|
fcport->sq_prod_idx++;
|
|
fcport->fw_sq_prod_idx++;
|
|
if (fcport->sq_prod_idx == total_sqe)
|
|
fcport->sq_prod_idx = 0;
|
|
|
|
return rval;
|
|
}
|
|
|
|
void qedf_ring_doorbell(struct qedf_rport *fcport)
|
|
{
|
|
struct fcoe_db_data dbell = { 0 };
|
|
|
|
dbell.agg_flags = 0;
|
|
|
|
dbell.params |= DB_DEST_XCM << FCOE_DB_DATA_DEST_SHIFT;
|
|
dbell.params |= DB_AGG_CMD_SET << FCOE_DB_DATA_AGG_CMD_SHIFT;
|
|
dbell.params |= DQ_XCM_FCOE_SQ_PROD_CMD <<
|
|
FCOE_DB_DATA_AGG_VAL_SEL_SHIFT;
|
|
|
|
dbell.sq_prod = fcport->fw_sq_prod_idx;
|
|
/* wmb makes sure that the BDs data is updated before updating the
|
|
* producer, otherwise FW may read old data from the BDs.
|
|
*/
|
|
wmb();
|
|
barrier();
|
|
writel(*(u32 *)&dbell, fcport->p_doorbell);
|
|
/*
|
|
* Fence required to flush the write combined buffer, since another
|
|
* CPU may write to the same doorbell address and data may be lost
|
|
* due to relaxed order nature of write combined bar.
|
|
*/
|
|
wmb();
|
|
}
|
|
|
|
static void qedf_trace_io(struct qedf_rport *fcport, struct qedf_ioreq *io_req,
|
|
int8_t direction)
|
|
{
|
|
struct qedf_ctx *qedf = fcport->qedf;
|
|
struct qedf_io_log *io_log;
|
|
struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&qedf->io_trace_lock, flags);
|
|
|
|
io_log = &qedf->io_trace_buf[qedf->io_trace_idx];
|
|
io_log->direction = direction;
|
|
io_log->task_id = io_req->xid;
|
|
io_log->port_id = fcport->rdata->ids.port_id;
|
|
io_log->lun = sc_cmd->device->lun;
|
|
io_log->op = sc_cmd->cmnd[0];
|
|
io_log->lba[0] = sc_cmd->cmnd[2];
|
|
io_log->lba[1] = sc_cmd->cmnd[3];
|
|
io_log->lba[2] = sc_cmd->cmnd[4];
|
|
io_log->lba[3] = sc_cmd->cmnd[5];
|
|
io_log->bufflen = scsi_bufflen(sc_cmd);
|
|
io_log->sg_count = scsi_sg_count(sc_cmd);
|
|
io_log->result = sc_cmd->result;
|
|
io_log->jiffies = jiffies;
|
|
io_log->refcount = kref_read(&io_req->refcount);
|
|
|
|
if (direction == QEDF_IO_TRACE_REQ) {
|
|
/* For requests we only care abot the submission CPU */
|
|
io_log->req_cpu = io_req->cpu;
|
|
io_log->int_cpu = 0;
|
|
io_log->rsp_cpu = 0;
|
|
} else if (direction == QEDF_IO_TRACE_RSP) {
|
|
io_log->req_cpu = io_req->cpu;
|
|
io_log->int_cpu = io_req->int_cpu;
|
|
io_log->rsp_cpu = smp_processor_id();
|
|
}
|
|
|
|
io_log->sge_type = io_req->sge_type;
|
|
|
|
qedf->io_trace_idx++;
|
|
if (qedf->io_trace_idx == QEDF_IO_TRACE_SIZE)
|
|
qedf->io_trace_idx = 0;
|
|
|
|
spin_unlock_irqrestore(&qedf->io_trace_lock, flags);
|
|
}
|
|
|
|
int qedf_post_io_req(struct qedf_rport *fcport, struct qedf_ioreq *io_req)
|
|
{
|
|
struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
|
|
struct Scsi_Host *host = sc_cmd->device->host;
|
|
struct fc_lport *lport = shost_priv(host);
|
|
struct qedf_ctx *qedf = lport_priv(lport);
|
|
struct fcoe_task_context *task_ctx;
|
|
u16 xid;
|
|
struct fcoe_wqe *sqe;
|
|
u16 sqe_idx;
|
|
|
|
/* Initialize rest of io_req fileds */
|
|
io_req->data_xfer_len = scsi_bufflen(sc_cmd);
|
|
qedf_priv(sc_cmd)->io_req = io_req;
|
|
io_req->sge_type = QEDF_IOREQ_FAST_SGE; /* Assume fast SGL by default */
|
|
|
|
/* Record which cpu this request is associated with */
|
|
io_req->cpu = smp_processor_id();
|
|
|
|
if (sc_cmd->sc_data_direction == DMA_FROM_DEVICE) {
|
|
io_req->io_req_flags = QEDF_READ;
|
|
qedf->input_requests++;
|
|
} else if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) {
|
|
io_req->io_req_flags = QEDF_WRITE;
|
|
qedf->output_requests++;
|
|
} else {
|
|
io_req->io_req_flags = 0;
|
|
qedf->control_requests++;
|
|
}
|
|
|
|
xid = io_req->xid;
|
|
|
|
/* Build buffer descriptor list for firmware from sg list */
|
|
if (qedf_build_bd_list_from_sg(io_req)) {
|
|
QEDF_ERR(&(qedf->dbg_ctx), "BD list creation failed.\n");
|
|
/* Release cmd will release io_req, but sc_cmd is assigned */
|
|
io_req->sc_cmd = NULL;
|
|
kref_put(&io_req->refcount, qedf_release_cmd);
|
|
return -EAGAIN;
|
|
}
|
|
|
|
if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags) ||
|
|
test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) {
|
|
QEDF_ERR(&(qedf->dbg_ctx), "Session not offloaded yet.\n");
|
|
/* Release cmd will release io_req, but sc_cmd is assigned */
|
|
io_req->sc_cmd = NULL;
|
|
kref_put(&io_req->refcount, qedf_release_cmd);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Record LUN number for later use if we need them */
|
|
io_req->lun = (int)sc_cmd->device->lun;
|
|
|
|
/* Obtain free SQE */
|
|
sqe_idx = qedf_get_sqe_idx(fcport);
|
|
sqe = &fcport->sq[sqe_idx];
|
|
memset(sqe, 0, sizeof(struct fcoe_wqe));
|
|
|
|
/* Get the task context */
|
|
task_ctx = qedf_get_task_mem(&qedf->tasks, xid);
|
|
if (!task_ctx) {
|
|
QEDF_WARN(&(qedf->dbg_ctx), "task_ctx is NULL, xid=%d.\n",
|
|
xid);
|
|
/* Release cmd will release io_req, but sc_cmd is assigned */
|
|
io_req->sc_cmd = NULL;
|
|
kref_put(&io_req->refcount, qedf_release_cmd);
|
|
return -EINVAL;
|
|
}
|
|
|
|
qedf_init_task(fcport, lport, io_req, task_ctx, sqe);
|
|
|
|
/* Ring doorbell */
|
|
qedf_ring_doorbell(fcport);
|
|
|
|
/* Set that command is with the firmware now */
|
|
set_bit(QEDF_CMD_OUTSTANDING, &io_req->flags);
|
|
|
|
if (qedf_io_tracing && io_req->sc_cmd)
|
|
qedf_trace_io(fcport, io_req, QEDF_IO_TRACE_REQ);
|
|
|
|
return false;
|
|
}
|
|
|
|
int
|
|
qedf_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *sc_cmd)
|
|
{
|
|
struct fc_lport *lport = shost_priv(host);
|
|
struct qedf_ctx *qedf = lport_priv(lport);
|
|
struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));
|
|
struct fc_rport_libfc_priv *rp = rport->dd_data;
|
|
struct qedf_rport *fcport;
|
|
struct qedf_ioreq *io_req;
|
|
int rc = 0;
|
|
int rval;
|
|
unsigned long flags = 0;
|
|
int num_sgs = 0;
|
|
|
|
num_sgs = scsi_sg_count(sc_cmd);
|
|
if (scsi_sg_count(sc_cmd) > QEDF_MAX_BDS_PER_CMD) {
|
|
QEDF_ERR(&qedf->dbg_ctx,
|
|
"Number of SG elements %d exceeds what hardware limitation of %d.\n",
|
|
num_sgs, QEDF_MAX_BDS_PER_CMD);
|
|
sc_cmd->result = DID_ERROR;
|
|
scsi_done(sc_cmd);
|
|
return 0;
|
|
}
|
|
|
|
if (test_bit(QEDF_UNLOADING, &qedf->flags) ||
|
|
test_bit(QEDF_DBG_STOP_IO, &qedf->flags)) {
|
|
QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO,
|
|
"Returning DNC as unloading or stop io, flags 0x%lx.\n",
|
|
qedf->flags);
|
|
sc_cmd->result = DID_NO_CONNECT << 16;
|
|
scsi_done(sc_cmd);
|
|
return 0;
|
|
}
|
|
|
|
if (!qedf->pdev->msix_enabled) {
|
|
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
|
|
"Completing sc_cmd=%p DID_NO_CONNECT as MSI-X is not enabled.\n",
|
|
sc_cmd);
|
|
sc_cmd->result = DID_NO_CONNECT << 16;
|
|
scsi_done(sc_cmd);
|
|
return 0;
|
|
}
|
|
|
|
rval = fc_remote_port_chkready(rport);
|
|
if (rval) {
|
|
QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO,
|
|
"fc_remote_port_chkready failed=0x%x for port_id=0x%06x.\n",
|
|
rval, rport->port_id);
|
|
sc_cmd->result = rval;
|
|
scsi_done(sc_cmd);
|
|
return 0;
|
|
}
|
|
|
|
/* Retry command if we are doing a qed drain operation */
|
|
if (test_bit(QEDF_DRAIN_ACTIVE, &qedf->flags)) {
|
|
QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, "Drain active.\n");
|
|
rc = SCSI_MLQUEUE_HOST_BUSY;
|
|
goto exit_qcmd;
|
|
}
|
|
|
|
if (lport->state != LPORT_ST_READY ||
|
|
atomic_read(&qedf->link_state) != QEDF_LINK_UP) {
|
|
QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, "Link down.\n");
|
|
rc = SCSI_MLQUEUE_HOST_BUSY;
|
|
goto exit_qcmd;
|
|
}
|
|
|
|
/* rport and tgt are allocated together, so tgt should be non-NULL */
|
|
fcport = (struct qedf_rport *)&rp[1];
|
|
|
|
if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags) ||
|
|
test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) {
|
|
/*
|
|
* Session is not offloaded yet. Let SCSI-ml retry
|
|
* the command.
|
|
*/
|
|
rc = SCSI_MLQUEUE_TARGET_BUSY;
|
|
goto exit_qcmd;
|
|
}
|
|
|
|
atomic_inc(&fcport->ios_to_queue);
|
|
|
|
if (fcport->retry_delay_timestamp) {
|
|
/* Take fcport->rport_lock for resetting the delay_timestamp */
|
|
spin_lock_irqsave(&fcport->rport_lock, flags);
|
|
if (time_after(jiffies, fcport->retry_delay_timestamp)) {
|
|
fcport->retry_delay_timestamp = 0;
|
|
} else {
|
|
spin_unlock_irqrestore(&fcport->rport_lock, flags);
|
|
/* If retry_delay timer is active, flow off the ML */
|
|
rc = SCSI_MLQUEUE_TARGET_BUSY;
|
|
atomic_dec(&fcport->ios_to_queue);
|
|
goto exit_qcmd;
|
|
}
|
|
spin_unlock_irqrestore(&fcport->rport_lock, flags);
|
|
}
|
|
|
|
io_req = qedf_alloc_cmd(fcport, QEDF_SCSI_CMD);
|
|
if (!io_req) {
|
|
rc = SCSI_MLQUEUE_HOST_BUSY;
|
|
atomic_dec(&fcport->ios_to_queue);
|
|
goto exit_qcmd;
|
|
}
|
|
|
|
io_req->sc_cmd = sc_cmd;
|
|
|
|
/* Take fcport->rport_lock for posting to fcport send queue */
|
|
spin_lock_irqsave(&fcport->rport_lock, flags);
|
|
if (qedf_post_io_req(fcport, io_req)) {
|
|
QEDF_WARN(&(qedf->dbg_ctx), "Unable to post io_req\n");
|
|
/* Return SQE to pool */
|
|
atomic_inc(&fcport->free_sqes);
|
|
rc = SCSI_MLQUEUE_HOST_BUSY;
|
|
}
|
|
spin_unlock_irqrestore(&fcport->rport_lock, flags);
|
|
atomic_dec(&fcport->ios_to_queue);
|
|
|
|
exit_qcmd:
|
|
return rc;
|
|
}
|
|
|
|
static void qedf_parse_fcp_rsp(struct qedf_ioreq *io_req,
|
|
struct fcoe_cqe_rsp_info *fcp_rsp)
|
|
{
|
|
struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
|
|
struct qedf_ctx *qedf = io_req->fcport->qedf;
|
|
u8 rsp_flags = fcp_rsp->rsp_flags.flags;
|
|
int fcp_sns_len = 0;
|
|
int fcp_rsp_len = 0;
|
|
uint8_t *rsp_info, *sense_data;
|
|
|
|
io_req->fcp_status = FC_GOOD;
|
|
io_req->fcp_resid = 0;
|
|
if (rsp_flags & (FCOE_FCP_RSP_FLAGS_FCP_RESID_OVER |
|
|
FCOE_FCP_RSP_FLAGS_FCP_RESID_UNDER))
|
|
io_req->fcp_resid = fcp_rsp->fcp_resid;
|
|
|
|
io_req->scsi_comp_flags = rsp_flags;
|
|
io_req->cdb_status = fcp_rsp->scsi_status_code;
|
|
|
|
if (rsp_flags &
|
|
FCOE_FCP_RSP_FLAGS_FCP_RSP_LEN_VALID)
|
|
fcp_rsp_len = fcp_rsp->fcp_rsp_len;
|
|
|
|
if (rsp_flags &
|
|
FCOE_FCP_RSP_FLAGS_FCP_SNS_LEN_VALID)
|
|
fcp_sns_len = fcp_rsp->fcp_sns_len;
|
|
|
|
io_req->fcp_rsp_len = fcp_rsp_len;
|
|
io_req->fcp_sns_len = fcp_sns_len;
|
|
rsp_info = sense_data = io_req->sense_buffer;
|
|
|
|
/* fetch fcp_rsp_code */
|
|
if ((fcp_rsp_len == 4) || (fcp_rsp_len == 8)) {
|
|
/* Only for task management function */
|
|
io_req->fcp_rsp_code = rsp_info[3];
|
|
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
|
|
"fcp_rsp_code = %d\n", io_req->fcp_rsp_code);
|
|
/* Adjust sense-data location. */
|
|
sense_data += fcp_rsp_len;
|
|
}
|
|
|
|
if (fcp_sns_len > SCSI_SENSE_BUFFERSIZE) {
|
|
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
|
|
"Truncating sense buffer\n");
|
|
fcp_sns_len = SCSI_SENSE_BUFFERSIZE;
|
|
}
|
|
|
|
/* The sense buffer can be NULL for TMF commands */
|
|
if (sc_cmd->sense_buffer) {
|
|
memset(sc_cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
|
|
if (fcp_sns_len)
|
|
memcpy(sc_cmd->sense_buffer, sense_data,
|
|
fcp_sns_len);
|
|
}
|
|
}
|
|
|
|
static void qedf_unmap_sg_list(struct qedf_ctx *qedf, struct qedf_ioreq *io_req)
|
|
{
|
|
struct scsi_cmnd *sc = io_req->sc_cmd;
|
|
|
|
if (io_req->bd_tbl->bd_valid && sc && scsi_sg_count(sc)) {
|
|
dma_unmap_sg(&qedf->pdev->dev, scsi_sglist(sc),
|
|
scsi_sg_count(sc), sc->sc_data_direction);
|
|
io_req->bd_tbl->bd_valid = 0;
|
|
}
|
|
}
|
|
|
|
void qedf_scsi_completion(struct qedf_ctx *qedf, struct fcoe_cqe *cqe,
|
|
struct qedf_ioreq *io_req)
|
|
{
|
|
struct scsi_cmnd *sc_cmd;
|
|
struct fcoe_cqe_rsp_info *fcp_rsp;
|
|
struct qedf_rport *fcport;
|
|
int refcount;
|
|
u16 scope, qualifier = 0;
|
|
u8 fw_residual_flag = 0;
|
|
unsigned long flags = 0;
|
|
u16 chk_scope = 0;
|
|
|
|
if (!io_req)
|
|
return;
|
|
if (!cqe)
|
|
return;
|
|
|
|
if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags) ||
|
|
test_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags) ||
|
|
test_bit(QEDF_CMD_IN_ABORT, &io_req->flags)) {
|
|
QEDF_ERR(&qedf->dbg_ctx,
|
|
"io_req xid=0x%x already in cleanup or abort processing or already completed.\n",
|
|
io_req->xid);
|
|
return;
|
|
}
|
|
|
|
sc_cmd = io_req->sc_cmd;
|
|
fcp_rsp = &cqe->cqe_info.rsp_info;
|
|
|
|
if (!sc_cmd) {
|
|
QEDF_WARN(&(qedf->dbg_ctx), "sc_cmd is NULL!\n");
|
|
return;
|
|
}
|
|
|
|
if (!qedf_priv(sc_cmd)->io_req) {
|
|
QEDF_WARN(&(qedf->dbg_ctx),
|
|
"io_req is NULL, returned in another context.\n");
|
|
return;
|
|
}
|
|
|
|
if (!sc_cmd->device) {
|
|
QEDF_ERR(&qedf->dbg_ctx,
|
|
"Device for sc_cmd %p is NULL.\n", sc_cmd);
|
|
return;
|
|
}
|
|
|
|
if (!scsi_cmd_to_rq(sc_cmd)->q) {
|
|
QEDF_WARN(&(qedf->dbg_ctx), "request->q is NULL so request "
|
|
"is not valid, sc_cmd=%p.\n", sc_cmd);
|
|
return;
|
|
}
|
|
|
|
fcport = io_req->fcport;
|
|
|
|
/*
|
|
* When flush is active, let the cmds be completed from the cleanup
|
|
* context
|
|
*/
|
|
if (test_bit(QEDF_RPORT_IN_TARGET_RESET, &fcport->flags) ||
|
|
(test_bit(QEDF_RPORT_IN_LUN_RESET, &fcport->flags) &&
|
|
sc_cmd->device->lun == (u64)fcport->lun_reset_lun)) {
|
|
QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO,
|
|
"Dropping good completion xid=0x%x as fcport is flushing",
|
|
io_req->xid);
|
|
return;
|
|
}
|
|
|
|
qedf_parse_fcp_rsp(io_req, fcp_rsp);
|
|
|
|
qedf_unmap_sg_list(qedf, io_req);
|
|
|
|
/* Check for FCP transport error */
|
|
if (io_req->fcp_rsp_len > 3 && io_req->fcp_rsp_code) {
|
|
QEDF_ERR(&(qedf->dbg_ctx),
|
|
"FCP I/O protocol failure xid=0x%x fcp_rsp_len=%d "
|
|
"fcp_rsp_code=%d.\n", io_req->xid, io_req->fcp_rsp_len,
|
|
io_req->fcp_rsp_code);
|
|
sc_cmd->result = DID_BUS_BUSY << 16;
|
|
goto out;
|
|
}
|
|
|
|
fw_residual_flag = GET_FIELD(cqe->cqe_info.rsp_info.fw_error_flags,
|
|
FCOE_CQE_RSP_INFO_FW_UNDERRUN);
|
|
if (fw_residual_flag) {
|
|
QEDF_ERR(&qedf->dbg_ctx,
|
|
"Firmware detected underrun: xid=0x%x fcp_rsp.flags=0x%02x fcp_resid=%d fw_residual=0x%x lba=%02x%02x%02x%02x.\n",
|
|
io_req->xid, fcp_rsp->rsp_flags.flags,
|
|
io_req->fcp_resid,
|
|
cqe->cqe_info.rsp_info.fw_residual, sc_cmd->cmnd[2],
|
|
sc_cmd->cmnd[3], sc_cmd->cmnd[4], sc_cmd->cmnd[5]);
|
|
|
|
if (io_req->cdb_status == 0)
|
|
sc_cmd->result = (DID_ERROR << 16) | io_req->cdb_status;
|
|
else
|
|
sc_cmd->result = (DID_OK << 16) | io_req->cdb_status;
|
|
|
|
/*
|
|
* Set resid to the whole buffer length so we won't try to resue
|
|
* any previously data.
|
|
*/
|
|
scsi_set_resid(sc_cmd, scsi_bufflen(sc_cmd));
|
|
goto out;
|
|
}
|
|
|
|
switch (io_req->fcp_status) {
|
|
case FC_GOOD:
|
|
if (io_req->cdb_status == 0) {
|
|
/* Good I/O completion */
|
|
sc_cmd->result = DID_OK << 16;
|
|
} else {
|
|
refcount = kref_read(&io_req->refcount);
|
|
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
|
|
"%d:0:%d:%lld xid=0x%0x op=0x%02x "
|
|
"lba=%02x%02x%02x%02x cdb_status=%d "
|
|
"fcp_resid=0x%x refcount=%d.\n",
|
|
qedf->lport->host->host_no, sc_cmd->device->id,
|
|
sc_cmd->device->lun, io_req->xid,
|
|
sc_cmd->cmnd[0], sc_cmd->cmnd[2], sc_cmd->cmnd[3],
|
|
sc_cmd->cmnd[4], sc_cmd->cmnd[5],
|
|
io_req->cdb_status, io_req->fcp_resid,
|
|
refcount);
|
|
sc_cmd->result = (DID_OK << 16) | io_req->cdb_status;
|
|
|
|
if (io_req->cdb_status == SAM_STAT_TASK_SET_FULL ||
|
|
io_req->cdb_status == SAM_STAT_BUSY) {
|
|
/*
|
|
* Check whether we need to set retry_delay at
|
|
* all based on retry_delay module parameter
|
|
* and the status qualifier.
|
|
*/
|
|
|
|
/* Upper 2 bits */
|
|
scope = fcp_rsp->retry_delay_timer & 0xC000;
|
|
/* Lower 14 bits */
|
|
qualifier = fcp_rsp->retry_delay_timer & 0x3FFF;
|
|
|
|
if (qedf_retry_delay)
|
|
chk_scope = 1;
|
|
/* Record stats */
|
|
if (io_req->cdb_status ==
|
|
SAM_STAT_TASK_SET_FULL)
|
|
qedf->task_set_fulls++;
|
|
else
|
|
qedf->busy++;
|
|
}
|
|
}
|
|
if (io_req->fcp_resid)
|
|
scsi_set_resid(sc_cmd, io_req->fcp_resid);
|
|
|
|
if (chk_scope == 1) {
|
|
if ((scope == 1 || scope == 2) &&
|
|
(qualifier > 0 && qualifier <= 0x3FEF)) {
|
|
/* Check we don't go over the max */
|
|
if (qualifier > QEDF_RETRY_DELAY_MAX) {
|
|
qualifier = QEDF_RETRY_DELAY_MAX;
|
|
QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO,
|
|
"qualifier = %d\n",
|
|
(fcp_rsp->retry_delay_timer &
|
|
0x3FFF));
|
|
}
|
|
QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO,
|
|
"Scope = %d and qualifier = %d",
|
|
scope, qualifier);
|
|
/* Take fcport->rport_lock to
|
|
* update the retry_delay_timestamp
|
|
*/
|
|
spin_lock_irqsave(&fcport->rport_lock, flags);
|
|
fcport->retry_delay_timestamp =
|
|
jiffies + (qualifier * HZ / 10);
|
|
spin_unlock_irqrestore(&fcport->rport_lock,
|
|
flags);
|
|
|
|
} else {
|
|
QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO,
|
|
"combination of scope = %d and qualifier = %d is not handled in qedf.\n",
|
|
scope, qualifier);
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, "fcp_status=%d.\n",
|
|
io_req->fcp_status);
|
|
break;
|
|
}
|
|
|
|
out:
|
|
if (qedf_io_tracing)
|
|
qedf_trace_io(fcport, io_req, QEDF_IO_TRACE_RSP);
|
|
|
|
/*
|
|
* We wait till the end of the function to clear the
|
|
* outstanding bit in case we need to send an abort
|
|
*/
|
|
clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags);
|
|
|
|
io_req->sc_cmd = NULL;
|
|
qedf_priv(sc_cmd)->io_req = NULL;
|
|
scsi_done(sc_cmd);
|
|
kref_put(&io_req->refcount, qedf_release_cmd);
|
|
}
|
|
|
|
/* Return a SCSI command in some other context besides a normal completion */
|
|
void qedf_scsi_done(struct qedf_ctx *qedf, struct qedf_ioreq *io_req,
|
|
int result)
|
|
{
|
|
struct scsi_cmnd *sc_cmd;
|
|
int refcount;
|
|
|
|
if (!io_req) {
|
|
QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, "io_req is NULL\n");
|
|
return;
|
|
}
|
|
|
|
if (test_and_set_bit(QEDF_CMD_ERR_SCSI_DONE, &io_req->flags)) {
|
|
QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO,
|
|
"io_req:%p scsi_done handling already done\n",
|
|
io_req);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* We will be done with this command after this call so clear the
|
|
* outstanding bit.
|
|
*/
|
|
clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags);
|
|
|
|
sc_cmd = io_req->sc_cmd;
|
|
|
|
if (!sc_cmd) {
|
|
QEDF_WARN(&(qedf->dbg_ctx), "sc_cmd is NULL!\n");
|
|
return;
|
|
}
|
|
|
|
if (!virt_addr_valid(sc_cmd)) {
|
|
QEDF_ERR(&qedf->dbg_ctx, "sc_cmd=%p is not valid.", sc_cmd);
|
|
goto bad_scsi_ptr;
|
|
}
|
|
|
|
if (!qedf_priv(sc_cmd)->io_req) {
|
|
QEDF_WARN(&(qedf->dbg_ctx),
|
|
"io_req is NULL, returned in another context.\n");
|
|
return;
|
|
}
|
|
|
|
if (!sc_cmd->device) {
|
|
QEDF_ERR(&qedf->dbg_ctx, "Device for sc_cmd %p is NULL.\n",
|
|
sc_cmd);
|
|
goto bad_scsi_ptr;
|
|
}
|
|
|
|
if (!virt_addr_valid(sc_cmd->device)) {
|
|
QEDF_ERR(&qedf->dbg_ctx,
|
|
"Device pointer for sc_cmd %p is bad.\n", sc_cmd);
|
|
goto bad_scsi_ptr;
|
|
}
|
|
|
|
if (!sc_cmd->sense_buffer) {
|
|
QEDF_ERR(&qedf->dbg_ctx,
|
|
"sc_cmd->sense_buffer for sc_cmd %p is NULL.\n",
|
|
sc_cmd);
|
|
goto bad_scsi_ptr;
|
|
}
|
|
|
|
if (!virt_addr_valid(sc_cmd->sense_buffer)) {
|
|
QEDF_ERR(&qedf->dbg_ctx,
|
|
"sc_cmd->sense_buffer for sc_cmd %p is bad.\n",
|
|
sc_cmd);
|
|
goto bad_scsi_ptr;
|
|
}
|
|
|
|
qedf_unmap_sg_list(qedf, io_req);
|
|
|
|
sc_cmd->result = result << 16;
|
|
refcount = kref_read(&io_req->refcount);
|
|
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, "%d:0:%d:%lld: Completing "
|
|
"sc_cmd=%p result=0x%08x op=0x%02x lba=0x%02x%02x%02x%02x, "
|
|
"allowed=%d retries=%d refcount=%d.\n",
|
|
qedf->lport->host->host_no, sc_cmd->device->id,
|
|
sc_cmd->device->lun, sc_cmd, sc_cmd->result, sc_cmd->cmnd[0],
|
|
sc_cmd->cmnd[2], sc_cmd->cmnd[3], sc_cmd->cmnd[4],
|
|
sc_cmd->cmnd[5], sc_cmd->allowed, sc_cmd->retries,
|
|
refcount);
|
|
|
|
/*
|
|
* Set resid to the whole buffer length so we won't try to resue any
|
|
* previously read data
|
|
*/
|
|
scsi_set_resid(sc_cmd, scsi_bufflen(sc_cmd));
|
|
|
|
if (qedf_io_tracing)
|
|
qedf_trace_io(io_req->fcport, io_req, QEDF_IO_TRACE_RSP);
|
|
|
|
io_req->sc_cmd = NULL;
|
|
qedf_priv(sc_cmd)->io_req = NULL;
|
|
scsi_done(sc_cmd);
|
|
kref_put(&io_req->refcount, qedf_release_cmd);
|
|
return;
|
|
|
|
bad_scsi_ptr:
|
|
/*
|
|
* Clear the io_req->sc_cmd backpointer so we don't try to process
|
|
* this again
|
|
*/
|
|
io_req->sc_cmd = NULL;
|
|
kref_put(&io_req->refcount, qedf_release_cmd); /* ID: 001 */
|
|
}
|
|
|
|
/*
|
|
* Handle warning type CQE completions. This is mainly used for REC timer
|
|
* popping.
|
|
*/
|
|
void qedf_process_warning_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe,
|
|
struct qedf_ioreq *io_req)
|
|
{
|
|
int rval, i;
|
|
struct qedf_rport *fcport = io_req->fcport;
|
|
u64 err_warn_bit_map;
|
|
u8 err_warn = 0xff;
|
|
|
|
if (!cqe) {
|
|
QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO,
|
|
"cqe is NULL for io_req %p xid=0x%x\n",
|
|
io_req, io_req->xid);
|
|
return;
|
|
}
|
|
|
|
QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), "Warning CQE, "
|
|
"xid=0x%x\n", io_req->xid);
|
|
QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx),
|
|
"err_warn_bitmap=%08x:%08x\n",
|
|
le32_to_cpu(cqe->cqe_info.err_info.err_warn_bitmap_hi),
|
|
le32_to_cpu(cqe->cqe_info.err_info.err_warn_bitmap_lo));
|
|
QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), "tx_buff_off=%08x, "
|
|
"rx_buff_off=%08x, rx_id=%04x\n",
|
|
le32_to_cpu(cqe->cqe_info.err_info.tx_buf_off),
|
|
le32_to_cpu(cqe->cqe_info.err_info.rx_buf_off),
|
|
le32_to_cpu(cqe->cqe_info.err_info.rx_id));
|
|
|
|
/* Normalize the error bitmap value to an just an unsigned int */
|
|
err_warn_bit_map = (u64)
|
|
((u64)cqe->cqe_info.err_info.err_warn_bitmap_hi << 32) |
|
|
(u64)cqe->cqe_info.err_info.err_warn_bitmap_lo;
|
|
for (i = 0; i < 64; i++) {
|
|
if (err_warn_bit_map & (u64)((u64)1 << i)) {
|
|
err_warn = i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Check if REC TOV expired if this is a tape device */
|
|
if (fcport->dev_type == QEDF_RPORT_TYPE_TAPE) {
|
|
if (err_warn ==
|
|
FCOE_WARNING_CODE_REC_TOV_TIMER_EXPIRATION) {
|
|
QEDF_ERR(&(qedf->dbg_ctx), "REC timer expired.\n");
|
|
if (!test_bit(QEDF_CMD_SRR_SENT, &io_req->flags)) {
|
|
io_req->rx_buf_off =
|
|
cqe->cqe_info.err_info.rx_buf_off;
|
|
io_req->tx_buf_off =
|
|
cqe->cqe_info.err_info.tx_buf_off;
|
|
io_req->rx_id = cqe->cqe_info.err_info.rx_id;
|
|
rval = qedf_send_rec(io_req);
|
|
/*
|
|
* We only want to abort the io_req if we
|
|
* can't queue the REC command as we want to
|
|
* keep the exchange open for recovery.
|
|
*/
|
|
if (rval)
|
|
goto send_abort;
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
|
|
send_abort:
|
|
init_completion(&io_req->abts_done);
|
|
rval = qedf_initiate_abts(io_req, true);
|
|
if (rval)
|
|
QEDF_ERR(&(qedf->dbg_ctx), "Failed to queue ABTS.\n");
|
|
}
|
|
|
|
/* Cleanup a command when we receive an error detection completion */
|
|
void qedf_process_error_detect(struct qedf_ctx *qedf, struct fcoe_cqe *cqe,
|
|
struct qedf_ioreq *io_req)
|
|
{
|
|
int rval;
|
|
|
|
if (io_req == NULL) {
|
|
QEDF_INFO(NULL, QEDF_LOG_IO, "io_req is NULL.\n");
|
|
return;
|
|
}
|
|
|
|
if (io_req->fcport == NULL) {
|
|
QEDF_INFO(NULL, QEDF_LOG_IO, "fcport is NULL.\n");
|
|
return;
|
|
}
|
|
|
|
if (!cqe) {
|
|
QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO,
|
|
"cqe is NULL for io_req %p\n", io_req);
|
|
return;
|
|
}
|
|
|
|
QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), "Error detection CQE, "
|
|
"xid=0x%x\n", io_req->xid);
|
|
QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx),
|
|
"err_warn_bitmap=%08x:%08x\n",
|
|
le32_to_cpu(cqe->cqe_info.err_info.err_warn_bitmap_hi),
|
|
le32_to_cpu(cqe->cqe_info.err_info.err_warn_bitmap_lo));
|
|
QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), "tx_buff_off=%08x, "
|
|
"rx_buff_off=%08x, rx_id=%04x\n",
|
|
le32_to_cpu(cqe->cqe_info.err_info.tx_buf_off),
|
|
le32_to_cpu(cqe->cqe_info.err_info.rx_buf_off),
|
|
le32_to_cpu(cqe->cqe_info.err_info.rx_id));
|
|
|
|
/* When flush is active, let the cmds be flushed out from the cleanup context */
|
|
if (test_bit(QEDF_RPORT_IN_TARGET_RESET, &io_req->fcport->flags) ||
|
|
(test_bit(QEDF_RPORT_IN_LUN_RESET, &io_req->fcport->flags) &&
|
|
io_req->sc_cmd->device->lun == (u64)io_req->fcport->lun_reset_lun)) {
|
|
QEDF_ERR(&qedf->dbg_ctx,
|
|
"Dropping EQE for xid=0x%x as fcport is flushing",
|
|
io_req->xid);
|
|
return;
|
|
}
|
|
|
|
if (qedf->stop_io_on_error) {
|
|
qedf_stop_all_io(qedf);
|
|
return;
|
|
}
|
|
|
|
init_completion(&io_req->abts_done);
|
|
rval = qedf_initiate_abts(io_req, true);
|
|
if (rval)
|
|
QEDF_ERR(&(qedf->dbg_ctx), "Failed to queue ABTS.\n");
|
|
}
|
|
|
|
static void qedf_flush_els_req(struct qedf_ctx *qedf,
|
|
struct qedf_ioreq *els_req)
|
|
{
|
|
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
|
|
"Flushing ELS request xid=0x%x refcount=%d.\n", els_req->xid,
|
|
kref_read(&els_req->refcount));
|
|
|
|
/*
|
|
* Need to distinguish this from a timeout when calling the
|
|
* els_req->cb_func.
|
|
*/
|
|
els_req->event = QEDF_IOREQ_EV_ELS_FLUSH;
|
|
|
|
clear_bit(QEDF_CMD_OUTSTANDING, &els_req->flags);
|
|
|
|
/* Cancel the timer */
|
|
cancel_delayed_work_sync(&els_req->timeout_work);
|
|
|
|
/* Call callback function to complete command */
|
|
if (els_req->cb_func && els_req->cb_arg) {
|
|
els_req->cb_func(els_req->cb_arg);
|
|
els_req->cb_arg = NULL;
|
|
}
|
|
|
|
/* Release kref for original initiate_els */
|
|
kref_put(&els_req->refcount, qedf_release_cmd);
|
|
}
|
|
|
|
/* A value of -1 for lun is a wild card that means flush all
|
|
* active SCSI I/Os for the target.
|
|
*/
|
|
void qedf_flush_active_ios(struct qedf_rport *fcport, int lun)
|
|
{
|
|
struct qedf_ioreq *io_req;
|
|
struct qedf_ctx *qedf;
|
|
struct qedf_cmd_mgr *cmd_mgr;
|
|
int i, rc;
|
|
unsigned long flags;
|
|
int flush_cnt = 0;
|
|
int wait_cnt = 100;
|
|
int refcount = 0;
|
|
|
|
if (!fcport) {
|
|
QEDF_ERR(NULL, "fcport is NULL\n");
|
|
return;
|
|
}
|
|
|
|
/* Check that fcport is still offloaded */
|
|
if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) {
|
|
QEDF_ERR(NULL, "fcport is no longer offloaded.\n");
|
|
return;
|
|
}
|
|
|
|
qedf = fcport->qedf;
|
|
|
|
if (!qedf) {
|
|
QEDF_ERR(NULL, "qedf is NULL.\n");
|
|
return;
|
|
}
|
|
|
|
/* Only wait for all commands to be queued in the Upload context */
|
|
if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags) &&
|
|
(lun == -1)) {
|
|
while (atomic_read(&fcport->ios_to_queue)) {
|
|
QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO,
|
|
"Waiting for %d I/Os to be queued\n",
|
|
atomic_read(&fcport->ios_to_queue));
|
|
if (wait_cnt == 0) {
|
|
QEDF_ERR(NULL,
|
|
"%d IOs request could not be queued\n",
|
|
atomic_read(&fcport->ios_to_queue));
|
|
}
|
|
msleep(20);
|
|
wait_cnt--;
|
|
}
|
|
}
|
|
|
|
cmd_mgr = qedf->cmd_mgr;
|
|
|
|
QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO,
|
|
"Flush active i/o's num=0x%x fcport=0x%p port_id=0x%06x scsi_id=%d.\n",
|
|
atomic_read(&fcport->num_active_ios), fcport,
|
|
fcport->rdata->ids.port_id, fcport->rport->scsi_target_id);
|
|
QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, "Locking flush mutex.\n");
|
|
|
|
mutex_lock(&qedf->flush_mutex);
|
|
if (lun == -1) {
|
|
set_bit(QEDF_RPORT_IN_TARGET_RESET, &fcport->flags);
|
|
} else {
|
|
set_bit(QEDF_RPORT_IN_LUN_RESET, &fcport->flags);
|
|
fcport->lun_reset_lun = lun;
|
|
}
|
|
|
|
for (i = 0; i < FCOE_PARAMS_NUM_TASKS; i++) {
|
|
io_req = &cmd_mgr->cmds[i];
|
|
|
|
if (!io_req)
|
|
continue;
|
|
if (!io_req->fcport)
|
|
continue;
|
|
|
|
spin_lock_irqsave(&cmd_mgr->lock, flags);
|
|
|
|
if (io_req->alloc) {
|
|
if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags)) {
|
|
if (io_req->cmd_type == QEDF_SCSI_CMD)
|
|
QEDF_ERR(&qedf->dbg_ctx,
|
|
"Allocated but not queued, xid=0x%x\n",
|
|
io_req->xid);
|
|
}
|
|
spin_unlock_irqrestore(&cmd_mgr->lock, flags);
|
|
} else {
|
|
spin_unlock_irqrestore(&cmd_mgr->lock, flags);
|
|
continue;
|
|
}
|
|
|
|
if (io_req->fcport != fcport)
|
|
continue;
|
|
|
|
/* In case of ABTS, CMD_OUTSTANDING is cleared on ABTS response,
|
|
* but RRQ is still pending.
|
|
* Workaround: Within qedf_send_rrq, we check if the fcport is
|
|
* NULL, and we drop the ref on the io_req to clean it up.
|
|
*/
|
|
if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags)) {
|
|
refcount = kref_read(&io_req->refcount);
|
|
QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO,
|
|
"Not outstanding, xid=0x%x, cmd_type=%d refcount=%d.\n",
|
|
io_req->xid, io_req->cmd_type, refcount);
|
|
/* If RRQ work has been queue, try to cancel it and
|
|
* free the io_req
|
|
*/
|
|
if (atomic_read(&io_req->state) ==
|
|
QEDFC_CMD_ST_RRQ_WAIT) {
|
|
if (cancel_delayed_work_sync
|
|
(&io_req->rrq_work)) {
|
|
QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO,
|
|
"Putting reference for pending RRQ work xid=0x%x.\n",
|
|
io_req->xid);
|
|
/* ID: 003 */
|
|
kref_put(&io_req->refcount,
|
|
qedf_release_cmd);
|
|
}
|
|
}
|
|
continue;
|
|
}
|
|
|
|
/* Only consider flushing ELS during target reset */
|
|
if (io_req->cmd_type == QEDF_ELS &&
|
|
lun == -1) {
|
|
rc = kref_get_unless_zero(&io_req->refcount);
|
|
if (!rc) {
|
|
QEDF_ERR(&(qedf->dbg_ctx),
|
|
"Could not get kref for ELS io_req=0x%p xid=0x%x.\n",
|
|
io_req, io_req->xid);
|
|
continue;
|
|
}
|
|
qedf_initiate_cleanup(io_req, false);
|
|
flush_cnt++;
|
|
qedf_flush_els_req(qedf, io_req);
|
|
|
|
/*
|
|
* Release the kref and go back to the top of the
|
|
* loop.
|
|
*/
|
|
goto free_cmd;
|
|
}
|
|
|
|
if (io_req->cmd_type == QEDF_ABTS) {
|
|
/* ID: 004 */
|
|
rc = kref_get_unless_zero(&io_req->refcount);
|
|
if (!rc) {
|
|
QEDF_ERR(&(qedf->dbg_ctx),
|
|
"Could not get kref for abort io_req=0x%p xid=0x%x.\n",
|
|
io_req, io_req->xid);
|
|
continue;
|
|
}
|
|
if (lun != -1 && io_req->lun != lun)
|
|
goto free_cmd;
|
|
|
|
QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO,
|
|
"Flushing abort xid=0x%x.\n", io_req->xid);
|
|
|
|
if (cancel_delayed_work_sync(&io_req->rrq_work)) {
|
|
QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO,
|
|
"Putting ref for cancelled RRQ work xid=0x%x.\n",
|
|
io_req->xid);
|
|
kref_put(&io_req->refcount, qedf_release_cmd);
|
|
}
|
|
|
|
if (cancel_delayed_work_sync(&io_req->timeout_work)) {
|
|
QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO,
|
|
"Putting ref for cancelled tmo work xid=0x%x.\n",
|
|
io_req->xid);
|
|
qedf_initiate_cleanup(io_req, true);
|
|
/* Notify eh_abort handler that ABTS is
|
|
* complete
|
|
*/
|
|
complete(&io_req->abts_done);
|
|
clear_bit(QEDF_CMD_IN_ABORT, &io_req->flags);
|
|
/* ID: 002 */
|
|
kref_put(&io_req->refcount, qedf_release_cmd);
|
|
}
|
|
flush_cnt++;
|
|
goto free_cmd;
|
|
}
|
|
|
|
if (!io_req->sc_cmd)
|
|
continue;
|
|
if (!io_req->sc_cmd->device) {
|
|
QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO,
|
|
"Device backpointer NULL for sc_cmd=%p.\n",
|
|
io_req->sc_cmd);
|
|
/* Put reference for non-existent scsi_cmnd */
|
|
io_req->sc_cmd = NULL;
|
|
qedf_initiate_cleanup(io_req, false);
|
|
kref_put(&io_req->refcount, qedf_release_cmd);
|
|
continue;
|
|
}
|
|
if (lun > -1) {
|
|
if (io_req->lun != lun)
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* Use kref_get_unless_zero in the unlikely case the command
|
|
* we're about to flush was completed in the normal SCSI path
|
|
*/
|
|
rc = kref_get_unless_zero(&io_req->refcount);
|
|
if (!rc) {
|
|
QEDF_ERR(&(qedf->dbg_ctx), "Could not get kref for "
|
|
"io_req=0x%p xid=0x%x\n", io_req, io_req->xid);
|
|
continue;
|
|
}
|
|
|
|
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
|
|
"Cleanup xid=0x%x.\n", io_req->xid);
|
|
flush_cnt++;
|
|
|
|
/* Cleanup task and return I/O mid-layer */
|
|
qedf_initiate_cleanup(io_req, true);
|
|
|
|
free_cmd:
|
|
kref_put(&io_req->refcount, qedf_release_cmd); /* ID: 004 */
|
|
}
|
|
|
|
wait_cnt = 60;
|
|
QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO,
|
|
"Flushed 0x%x I/Os, active=0x%x.\n",
|
|
flush_cnt, atomic_read(&fcport->num_active_ios));
|
|
/* Only wait for all commands to complete in the Upload context */
|
|
if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags) &&
|
|
(lun == -1)) {
|
|
while (atomic_read(&fcport->num_active_ios)) {
|
|
QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO,
|
|
"Flushed 0x%x I/Os, active=0x%x cnt=%d.\n",
|
|
flush_cnt,
|
|
atomic_read(&fcport->num_active_ios),
|
|
wait_cnt);
|
|
if (wait_cnt == 0) {
|
|
QEDF_ERR(&qedf->dbg_ctx,
|
|
"Flushed %d I/Os, active=%d.\n",
|
|
flush_cnt,
|
|
atomic_read(&fcport->num_active_ios));
|
|
for (i = 0; i < FCOE_PARAMS_NUM_TASKS; i++) {
|
|
io_req = &cmd_mgr->cmds[i];
|
|
if (io_req->fcport &&
|
|
io_req->fcport == fcport) {
|
|
refcount =
|
|
kref_read(&io_req->refcount);
|
|
set_bit(QEDF_CMD_DIRTY,
|
|
&io_req->flags);
|
|
QEDF_ERR(&qedf->dbg_ctx,
|
|
"Outstanding io_req =%p xid=0x%x flags=0x%lx, sc_cmd=%p refcount=%d cmd_type=%d.\n",
|
|
io_req, io_req->xid,
|
|
io_req->flags,
|
|
io_req->sc_cmd,
|
|
refcount,
|
|
io_req->cmd_type);
|
|
}
|
|
}
|
|
WARN_ON(1);
|
|
break;
|
|
}
|
|
msleep(500);
|
|
wait_cnt--;
|
|
}
|
|
}
|
|
|
|
clear_bit(QEDF_RPORT_IN_LUN_RESET, &fcport->flags);
|
|
clear_bit(QEDF_RPORT_IN_TARGET_RESET, &fcport->flags);
|
|
QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, "Unlocking flush mutex.\n");
|
|
mutex_unlock(&qedf->flush_mutex);
|
|
}
|
|
|
|
/*
|
|
* Initiate a ABTS middle path command. Note that we don't have to initialize
|
|
* the task context for an ABTS task.
|
|
*/
|
|
int qedf_initiate_abts(struct qedf_ioreq *io_req, bool return_scsi_cmd_on_abts)
|
|
{
|
|
struct fc_lport *lport;
|
|
struct qedf_rport *fcport = io_req->fcport;
|
|
struct fc_rport_priv *rdata;
|
|
struct qedf_ctx *qedf;
|
|
u16 xid;
|
|
int rc = 0;
|
|
unsigned long flags;
|
|
struct fcoe_wqe *sqe;
|
|
u16 sqe_idx;
|
|
int refcount = 0;
|
|
|
|
/* Sanity check qedf_rport before dereferencing any pointers */
|
|
if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) {
|
|
QEDF_ERR(NULL, "tgt not offloaded\n");
|
|
rc = 1;
|
|
goto out;
|
|
}
|
|
|
|
qedf = fcport->qedf;
|
|
rdata = fcport->rdata;
|
|
|
|
if (!rdata || !kref_get_unless_zero(&rdata->kref)) {
|
|
QEDF_ERR(&qedf->dbg_ctx, "stale rport\n");
|
|
rc = 1;
|
|
goto out;
|
|
}
|
|
|
|
lport = qedf->lport;
|
|
|
|
if (lport->state != LPORT_ST_READY || !(lport->link_up)) {
|
|
QEDF_ERR(&(qedf->dbg_ctx), "link is not ready\n");
|
|
rc = 1;
|
|
goto drop_rdata_kref;
|
|
}
|
|
|
|
if (atomic_read(&qedf->link_down_tmo_valid) > 0) {
|
|
QEDF_ERR(&(qedf->dbg_ctx), "link_down_tmo active.\n");
|
|
rc = 1;
|
|
goto drop_rdata_kref;
|
|
}
|
|
|
|
/* Ensure room on SQ */
|
|
if (!atomic_read(&fcport->free_sqes)) {
|
|
QEDF_ERR(&(qedf->dbg_ctx), "No SQ entries available\n");
|
|
rc = 1;
|
|
goto drop_rdata_kref;
|
|
}
|
|
|
|
if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) {
|
|
QEDF_ERR(&qedf->dbg_ctx, "fcport is uploading.\n");
|
|
rc = 1;
|
|
goto drop_rdata_kref;
|
|
}
|
|
|
|
if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags) ||
|
|
test_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags) ||
|
|
test_bit(QEDF_CMD_IN_ABORT, &io_req->flags)) {
|
|
QEDF_ERR(&qedf->dbg_ctx,
|
|
"io_req xid=0x%x sc_cmd=%p already in cleanup or abort processing or already completed.\n",
|
|
io_req->xid, io_req->sc_cmd);
|
|
rc = 1;
|
|
goto drop_rdata_kref;
|
|
}
|
|
|
|
kref_get(&io_req->refcount);
|
|
|
|
xid = io_req->xid;
|
|
qedf->control_requests++;
|
|
qedf->packet_aborts++;
|
|
|
|
/* Set the command type to abort */
|
|
io_req->cmd_type = QEDF_ABTS;
|
|
io_req->return_scsi_cmd_on_abts = return_scsi_cmd_on_abts;
|
|
|
|
set_bit(QEDF_CMD_IN_ABORT, &io_req->flags);
|
|
refcount = kref_read(&io_req->refcount);
|
|
QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_SCSI_TM,
|
|
"ABTS io_req xid = 0x%x refcount=%d\n",
|
|
xid, refcount);
|
|
|
|
qedf_cmd_timer_set(qedf, io_req, QEDF_ABORT_TIMEOUT);
|
|
|
|
spin_lock_irqsave(&fcport->rport_lock, flags);
|
|
|
|
sqe_idx = qedf_get_sqe_idx(fcport);
|
|
sqe = &fcport->sq[sqe_idx];
|
|
memset(sqe, 0, sizeof(struct fcoe_wqe));
|
|
io_req->task_params->sqe = sqe;
|
|
|
|
init_initiator_abort_fcoe_task(io_req->task_params);
|
|
qedf_ring_doorbell(fcport);
|
|
|
|
spin_unlock_irqrestore(&fcport->rport_lock, flags);
|
|
|
|
drop_rdata_kref:
|
|
kref_put(&rdata->kref, fc_rport_destroy);
|
|
out:
|
|
return rc;
|
|
}
|
|
|
|
void qedf_process_abts_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe,
|
|
struct qedf_ioreq *io_req)
|
|
{
|
|
uint32_t r_ctl;
|
|
int rc;
|
|
struct qedf_rport *fcport = io_req->fcport;
|
|
|
|
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_SCSI_TM, "Entered with xid = "
|
|
"0x%x cmd_type = %d\n", io_req->xid, io_req->cmd_type);
|
|
|
|
r_ctl = cqe->cqe_info.abts_info.r_ctl;
|
|
|
|
/* This was added at a point when we were scheduling abts_compl &
|
|
* cleanup_compl on different CPUs and there was a possibility of
|
|
* the io_req to be freed from the other context before we got here.
|
|
*/
|
|
if (!fcport) {
|
|
QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO,
|
|
"Dropping ABTS completion xid=0x%x as fcport is NULL",
|
|
io_req->xid);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* When flush is active, let the cmds be completed from the cleanup
|
|
* context
|
|
*/
|
|
if (test_bit(QEDF_RPORT_IN_TARGET_RESET, &fcport->flags) ||
|
|
test_bit(QEDF_RPORT_IN_LUN_RESET, &fcport->flags)) {
|
|
QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO,
|
|
"Dropping ABTS completion xid=0x%x as fcport is flushing",
|
|
io_req->xid);
|
|
return;
|
|
}
|
|
|
|
if (!cancel_delayed_work(&io_req->timeout_work)) {
|
|
QEDF_ERR(&qedf->dbg_ctx,
|
|
"Wasn't able to cancel abts timeout work.\n");
|
|
}
|
|
|
|
switch (r_ctl) {
|
|
case FC_RCTL_BA_ACC:
|
|
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_SCSI_TM,
|
|
"ABTS response - ACC Send RRQ after R_A_TOV\n");
|
|
io_req->event = QEDF_IOREQ_EV_ABORT_SUCCESS;
|
|
rc = kref_get_unless_zero(&io_req->refcount); /* ID: 003 */
|
|
if (!rc) {
|
|
QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_SCSI_TM,
|
|
"kref is already zero so ABTS was already completed or flushed xid=0x%x.\n",
|
|
io_req->xid);
|
|
return;
|
|
}
|
|
/*
|
|
* Dont release this cmd yet. It will be relesed
|
|
* after we get RRQ response
|
|
*/
|
|
queue_delayed_work(qedf->dpc_wq, &io_req->rrq_work,
|
|
msecs_to_jiffies(qedf->lport->r_a_tov));
|
|
atomic_set(&io_req->state, QEDFC_CMD_ST_RRQ_WAIT);
|
|
break;
|
|
/* For error cases let the cleanup return the command */
|
|
case FC_RCTL_BA_RJT:
|
|
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_SCSI_TM,
|
|
"ABTS response - RJT\n");
|
|
io_req->event = QEDF_IOREQ_EV_ABORT_FAILED;
|
|
break;
|
|
default:
|
|
QEDF_ERR(&(qedf->dbg_ctx), "Unknown ABTS response\n");
|
|
break;
|
|
}
|
|
|
|
clear_bit(QEDF_CMD_IN_ABORT, &io_req->flags);
|
|
|
|
if (io_req->sc_cmd) {
|
|
if (!io_req->return_scsi_cmd_on_abts)
|
|
QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_SCSI_TM,
|
|
"Not call scsi_done for xid=0x%x.\n",
|
|
io_req->xid);
|
|
if (io_req->return_scsi_cmd_on_abts)
|
|
qedf_scsi_done(qedf, io_req, DID_ERROR);
|
|
}
|
|
|
|
/* Notify eh_abort handler that ABTS is complete */
|
|
complete(&io_req->abts_done);
|
|
|
|
kref_put(&io_req->refcount, qedf_release_cmd);
|
|
}
|
|
|
|
int qedf_init_mp_req(struct qedf_ioreq *io_req)
|
|
{
|
|
struct qedf_mp_req *mp_req;
|
|
struct scsi_sge *mp_req_bd;
|
|
struct scsi_sge *mp_resp_bd;
|
|
struct qedf_ctx *qedf = io_req->fcport->qedf;
|
|
dma_addr_t addr;
|
|
uint64_t sz;
|
|
|
|
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_MP_REQ, "Entered.\n");
|
|
|
|
mp_req = (struct qedf_mp_req *)&(io_req->mp_req);
|
|
memset(mp_req, 0, sizeof(struct qedf_mp_req));
|
|
|
|
if (io_req->cmd_type != QEDF_ELS) {
|
|
mp_req->req_len = sizeof(struct fcp_cmnd);
|
|
io_req->data_xfer_len = mp_req->req_len;
|
|
} else
|
|
mp_req->req_len = io_req->data_xfer_len;
|
|
|
|
mp_req->req_buf = dma_alloc_coherent(&qedf->pdev->dev, QEDF_PAGE_SIZE,
|
|
&mp_req->req_buf_dma, GFP_KERNEL);
|
|
if (!mp_req->req_buf) {
|
|
QEDF_ERR(&(qedf->dbg_ctx), "Unable to alloc MP req buffer\n");
|
|
qedf_free_mp_resc(io_req);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
mp_req->resp_buf = dma_alloc_coherent(&qedf->pdev->dev,
|
|
QEDF_PAGE_SIZE, &mp_req->resp_buf_dma, GFP_KERNEL);
|
|
if (!mp_req->resp_buf) {
|
|
QEDF_ERR(&(qedf->dbg_ctx), "Unable to alloc TM resp "
|
|
"buffer\n");
|
|
qedf_free_mp_resc(io_req);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* Allocate and map mp_req_bd and mp_resp_bd */
|
|
sz = sizeof(struct scsi_sge);
|
|
mp_req->mp_req_bd = dma_alloc_coherent(&qedf->pdev->dev, sz,
|
|
&mp_req->mp_req_bd_dma, GFP_KERNEL);
|
|
if (!mp_req->mp_req_bd) {
|
|
QEDF_ERR(&(qedf->dbg_ctx), "Unable to alloc MP req bd\n");
|
|
qedf_free_mp_resc(io_req);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
mp_req->mp_resp_bd = dma_alloc_coherent(&qedf->pdev->dev, sz,
|
|
&mp_req->mp_resp_bd_dma, GFP_KERNEL);
|
|
if (!mp_req->mp_resp_bd) {
|
|
QEDF_ERR(&(qedf->dbg_ctx), "Unable to alloc MP resp bd\n");
|
|
qedf_free_mp_resc(io_req);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* Fill bd table */
|
|
addr = mp_req->req_buf_dma;
|
|
mp_req_bd = mp_req->mp_req_bd;
|
|
mp_req_bd->sge_addr.lo = U64_LO(addr);
|
|
mp_req_bd->sge_addr.hi = U64_HI(addr);
|
|
mp_req_bd->sge_len = QEDF_PAGE_SIZE;
|
|
|
|
/*
|
|
* MP buffer is either a task mgmt command or an ELS.
|
|
* So the assumption is that it consumes a single bd
|
|
* entry in the bd table
|
|
*/
|
|
mp_resp_bd = mp_req->mp_resp_bd;
|
|
addr = mp_req->resp_buf_dma;
|
|
mp_resp_bd->sge_addr.lo = U64_LO(addr);
|
|
mp_resp_bd->sge_addr.hi = U64_HI(addr);
|
|
mp_resp_bd->sge_len = QEDF_PAGE_SIZE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Last ditch effort to clear the port if it's stuck. Used only after a
|
|
* cleanup task times out.
|
|
*/
|
|
static void qedf_drain_request(struct qedf_ctx *qedf)
|
|
{
|
|
if (test_bit(QEDF_DRAIN_ACTIVE, &qedf->flags)) {
|
|
QEDF_ERR(&(qedf->dbg_ctx), "MCP drain already active.\n");
|
|
return;
|
|
}
|
|
|
|
/* Set bit to return all queuecommand requests as busy */
|
|
set_bit(QEDF_DRAIN_ACTIVE, &qedf->flags);
|
|
|
|
/* Call qed drain request for function. Should be synchronous */
|
|
qed_ops->common->drain(qedf->cdev);
|
|
|
|
/* Settle time for CQEs to be returned */
|
|
msleep(100);
|
|
|
|
/* Unplug and continue */
|
|
clear_bit(QEDF_DRAIN_ACTIVE, &qedf->flags);
|
|
}
|
|
|
|
/*
|
|
* Returns SUCCESS if the cleanup task does not timeout, otherwise return
|
|
* FAILURE.
|
|
*/
|
|
int qedf_initiate_cleanup(struct qedf_ioreq *io_req,
|
|
bool return_scsi_cmd_on_abts)
|
|
{
|
|
struct qedf_rport *fcport;
|
|
struct qedf_ctx *qedf;
|
|
int tmo = 0;
|
|
int rc = SUCCESS;
|
|
unsigned long flags;
|
|
struct fcoe_wqe *sqe;
|
|
u16 sqe_idx;
|
|
int refcount = 0;
|
|
|
|
fcport = io_req->fcport;
|
|
if (!fcport) {
|
|
QEDF_ERR(NULL, "fcport is NULL.\n");
|
|
return SUCCESS;
|
|
}
|
|
|
|
/* Sanity check qedf_rport before dereferencing any pointers */
|
|
if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) {
|
|
QEDF_ERR(NULL, "tgt not offloaded\n");
|
|
return SUCCESS;
|
|
}
|
|
|
|
qedf = fcport->qedf;
|
|
if (!qedf) {
|
|
QEDF_ERR(NULL, "qedf is NULL.\n");
|
|
return SUCCESS;
|
|
}
|
|
|
|
if (io_req->cmd_type == QEDF_ELS) {
|
|
goto process_els;
|
|
}
|
|
|
|
if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags) ||
|
|
test_and_set_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags)) {
|
|
QEDF_ERR(&(qedf->dbg_ctx), "io_req xid=0x%x already in "
|
|
"cleanup processing or already completed.\n",
|
|
io_req->xid);
|
|
return SUCCESS;
|
|
}
|
|
set_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags);
|
|
|
|
process_els:
|
|
/* Ensure room on SQ */
|
|
if (!atomic_read(&fcport->free_sqes)) {
|
|
QEDF_ERR(&(qedf->dbg_ctx), "No SQ entries available\n");
|
|
/* Need to make sure we clear the flag since it was set */
|
|
clear_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags);
|
|
return FAILED;
|
|
}
|
|
|
|
if (io_req->cmd_type == QEDF_CLEANUP) {
|
|
QEDF_ERR(&qedf->dbg_ctx,
|
|
"io_req=0x%x is already a cleanup command cmd_type=%d.\n",
|
|
io_req->xid, io_req->cmd_type);
|
|
clear_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags);
|
|
return SUCCESS;
|
|
}
|
|
|
|
refcount = kref_read(&io_req->refcount);
|
|
|
|
QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO,
|
|
"Entered xid=0x%x sc_cmd=%p cmd_type=%d flags=0x%lx refcount=%d fcport=%p port_id=0x%06x\n",
|
|
io_req->xid, io_req->sc_cmd, io_req->cmd_type, io_req->flags,
|
|
refcount, fcport, fcport->rdata->ids.port_id);
|
|
|
|
/* Cleanup cmds re-use the same TID as the original I/O */
|
|
io_req->cmd_type = QEDF_CLEANUP;
|
|
io_req->return_scsi_cmd_on_abts = return_scsi_cmd_on_abts;
|
|
|
|
init_completion(&io_req->cleanup_done);
|
|
|
|
spin_lock_irqsave(&fcport->rport_lock, flags);
|
|
|
|
sqe_idx = qedf_get_sqe_idx(fcport);
|
|
sqe = &fcport->sq[sqe_idx];
|
|
memset(sqe, 0, sizeof(struct fcoe_wqe));
|
|
io_req->task_params->sqe = sqe;
|
|
|
|
init_initiator_cleanup_fcoe_task(io_req->task_params);
|
|
qedf_ring_doorbell(fcport);
|
|
|
|
spin_unlock_irqrestore(&fcport->rport_lock, flags);
|
|
|
|
tmo = wait_for_completion_timeout(&io_req->cleanup_done,
|
|
QEDF_CLEANUP_TIMEOUT * HZ);
|
|
|
|
if (!tmo) {
|
|
rc = FAILED;
|
|
/* Timeout case */
|
|
QEDF_ERR(&(qedf->dbg_ctx), "Cleanup command timeout, "
|
|
"xid=%x.\n", io_req->xid);
|
|
clear_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags);
|
|
/* Issue a drain request if cleanup task times out */
|
|
QEDF_ERR(&(qedf->dbg_ctx), "Issuing MCP drain request.\n");
|
|
qedf_drain_request(qedf);
|
|
}
|
|
|
|
/* If it TASK MGMT handle it, reference will be decreased
|
|
* in qedf_execute_tmf
|
|
*/
|
|
if (io_req->tm_flags == FCP_TMF_LUN_RESET ||
|
|
io_req->tm_flags == FCP_TMF_TGT_RESET) {
|
|
clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags);
|
|
io_req->sc_cmd = NULL;
|
|
kref_put(&io_req->refcount, qedf_release_cmd);
|
|
complete(&io_req->tm_done);
|
|
}
|
|
|
|
if (io_req->sc_cmd) {
|
|
if (!io_req->return_scsi_cmd_on_abts)
|
|
QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_SCSI_TM,
|
|
"Not call scsi_done for xid=0x%x.\n",
|
|
io_req->xid);
|
|
if (io_req->return_scsi_cmd_on_abts)
|
|
qedf_scsi_done(qedf, io_req, DID_ERROR);
|
|
}
|
|
|
|
if (rc == SUCCESS)
|
|
io_req->event = QEDF_IOREQ_EV_CLEANUP_SUCCESS;
|
|
else
|
|
io_req->event = QEDF_IOREQ_EV_CLEANUP_FAILED;
|
|
|
|
return rc;
|
|
}
|
|
|
|
void qedf_process_cleanup_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe,
|
|
struct qedf_ioreq *io_req)
|
|
{
|
|
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, "Entered xid = 0x%x\n",
|
|
io_req->xid);
|
|
|
|
clear_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags);
|
|
|
|
/* Complete so we can finish cleaning up the I/O */
|
|
complete(&io_req->cleanup_done);
|
|
}
|
|
|
|
static int qedf_execute_tmf(struct qedf_rport *fcport, struct scsi_cmnd *sc_cmd,
|
|
uint8_t tm_flags)
|
|
{
|
|
struct qedf_ioreq *io_req;
|
|
struct fcoe_task_context *task;
|
|
struct qedf_ctx *qedf = fcport->qedf;
|
|
struct fc_lport *lport = qedf->lport;
|
|
int rc = 0;
|
|
uint16_t xid;
|
|
int tmo = 0;
|
|
int lun = 0;
|
|
unsigned long flags;
|
|
struct fcoe_wqe *sqe;
|
|
u16 sqe_idx;
|
|
|
|
if (!sc_cmd) {
|
|
QEDF_ERR(&qedf->dbg_ctx, "sc_cmd is NULL\n");
|
|
return FAILED;
|
|
}
|
|
|
|
lun = (int)sc_cmd->device->lun;
|
|
if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) {
|
|
QEDF_ERR(&(qedf->dbg_ctx), "fcport not offloaded\n");
|
|
rc = FAILED;
|
|
goto no_flush;
|
|
}
|
|
|
|
io_req = qedf_alloc_cmd(fcport, QEDF_TASK_MGMT_CMD);
|
|
if (!io_req) {
|
|
QEDF_ERR(&(qedf->dbg_ctx), "Failed TMF");
|
|
rc = -EAGAIN;
|
|
goto no_flush;
|
|
}
|
|
|
|
if (tm_flags == FCP_TMF_LUN_RESET)
|
|
qedf->lun_resets++;
|
|
else if (tm_flags == FCP_TMF_TGT_RESET)
|
|
qedf->target_resets++;
|
|
|
|
/* Initialize rest of io_req fields */
|
|
io_req->sc_cmd = sc_cmd;
|
|
io_req->fcport = fcport;
|
|
io_req->cmd_type = QEDF_TASK_MGMT_CMD;
|
|
|
|
/* Record which cpu this request is associated with */
|
|
io_req->cpu = smp_processor_id();
|
|
|
|
/* Set TM flags */
|
|
io_req->io_req_flags = QEDF_READ;
|
|
io_req->data_xfer_len = 0;
|
|
io_req->tm_flags = tm_flags;
|
|
|
|
/* Default is to return a SCSI command when an error occurs */
|
|
io_req->return_scsi_cmd_on_abts = false;
|
|
|
|
/* Obtain exchange id */
|
|
xid = io_req->xid;
|
|
|
|
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_SCSI_TM, "TMF io_req xid = "
|
|
"0x%x\n", xid);
|
|
|
|
/* Initialize task context for this IO request */
|
|
task = qedf_get_task_mem(&qedf->tasks, xid);
|
|
|
|
init_completion(&io_req->tm_done);
|
|
|
|
spin_lock_irqsave(&fcport->rport_lock, flags);
|
|
|
|
sqe_idx = qedf_get_sqe_idx(fcport);
|
|
sqe = &fcport->sq[sqe_idx];
|
|
memset(sqe, 0, sizeof(struct fcoe_wqe));
|
|
|
|
qedf_init_task(fcport, lport, io_req, task, sqe);
|
|
qedf_ring_doorbell(fcport);
|
|
|
|
spin_unlock_irqrestore(&fcport->rport_lock, flags);
|
|
|
|
set_bit(QEDF_CMD_OUTSTANDING, &io_req->flags);
|
|
tmo = wait_for_completion_timeout(&io_req->tm_done,
|
|
QEDF_TM_TIMEOUT * HZ);
|
|
|
|
if (!tmo) {
|
|
rc = FAILED;
|
|
QEDF_ERR(&(qedf->dbg_ctx), "wait for tm_cmpl timeout!\n");
|
|
/* Clear outstanding bit since command timed out */
|
|
clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags);
|
|
io_req->sc_cmd = NULL;
|
|
} else {
|
|
/* Check TMF response code */
|
|
if (io_req->fcp_rsp_code == 0)
|
|
rc = SUCCESS;
|
|
else
|
|
rc = FAILED;
|
|
}
|
|
/*
|
|
* Double check that fcport has not gone into an uploading state before
|
|
* executing the command flush for the LUN/target.
|
|
*/
|
|
if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) {
|
|
QEDF_ERR(&qedf->dbg_ctx,
|
|
"fcport is uploading, not executing flush.\n");
|
|
goto no_flush;
|
|
}
|
|
/* We do not need this io_req any more */
|
|
kref_put(&io_req->refcount, qedf_release_cmd);
|
|
|
|
|
|
if (tm_flags == FCP_TMF_LUN_RESET)
|
|
qedf_flush_active_ios(fcport, lun);
|
|
else
|
|
qedf_flush_active_ios(fcport, -1);
|
|
|
|
no_flush:
|
|
if (rc != SUCCESS) {
|
|
QEDF_ERR(&(qedf->dbg_ctx), "task mgmt command failed...\n");
|
|
rc = FAILED;
|
|
} else {
|
|
QEDF_ERR(&(qedf->dbg_ctx), "task mgmt command success...\n");
|
|
rc = SUCCESS;
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
int qedf_initiate_tmf(struct scsi_cmnd *sc_cmd, u8 tm_flags)
|
|
{
|
|
struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));
|
|
struct fc_rport_libfc_priv *rp = rport->dd_data;
|
|
struct qedf_rport *fcport = (struct qedf_rport *)&rp[1];
|
|
struct qedf_ctx *qedf;
|
|
struct fc_lport *lport = shost_priv(sc_cmd->device->host);
|
|
int rc = SUCCESS;
|
|
int rval;
|
|
struct qedf_ioreq *io_req = NULL;
|
|
int ref_cnt = 0;
|
|
struct fc_rport_priv *rdata = fcport->rdata;
|
|
|
|
QEDF_ERR(NULL,
|
|
"tm_flags 0x%x sc_cmd %p op = 0x%02x target_id = 0x%x lun=%d\n",
|
|
tm_flags, sc_cmd, sc_cmd->cmd_len ? sc_cmd->cmnd[0] : 0xff,
|
|
rport->scsi_target_id, (int)sc_cmd->device->lun);
|
|
|
|
if (!rdata || !kref_get_unless_zero(&rdata->kref)) {
|
|
QEDF_ERR(NULL, "stale rport\n");
|
|
return FAILED;
|
|
}
|
|
|
|
QEDF_ERR(NULL, "portid=%06x tm_flags =%s\n", rdata->ids.port_id,
|
|
(tm_flags == FCP_TMF_TGT_RESET) ? "TARGET RESET" :
|
|
"LUN RESET");
|
|
|
|
if (qedf_priv(sc_cmd)->io_req) {
|
|
io_req = qedf_priv(sc_cmd)->io_req;
|
|
ref_cnt = kref_read(&io_req->refcount);
|
|
QEDF_ERR(NULL,
|
|
"orig io_req = %p xid = 0x%x ref_cnt = %d.\n",
|
|
io_req, io_req->xid, ref_cnt);
|
|
}
|
|
|
|
rval = fc_remote_port_chkready(rport);
|
|
if (rval) {
|
|
QEDF_ERR(NULL, "device_reset rport not ready\n");
|
|
rc = FAILED;
|
|
goto tmf_err;
|
|
}
|
|
|
|
rc = fc_block_scsi_eh(sc_cmd);
|
|
if (rc)
|
|
goto tmf_err;
|
|
|
|
if (!fcport) {
|
|
QEDF_ERR(NULL, "device_reset: rport is NULL\n");
|
|
rc = FAILED;
|
|
goto tmf_err;
|
|
}
|
|
|
|
qedf = fcport->qedf;
|
|
|
|
if (!qedf) {
|
|
QEDF_ERR(NULL, "qedf is NULL.\n");
|
|
rc = FAILED;
|
|
goto tmf_err;
|
|
}
|
|
|
|
if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) {
|
|
QEDF_ERR(&qedf->dbg_ctx, "Connection is getting uploaded.\n");
|
|
rc = SUCCESS;
|
|
goto tmf_err;
|
|
}
|
|
|
|
if (test_bit(QEDF_UNLOADING, &qedf->flags) ||
|
|
test_bit(QEDF_DBG_STOP_IO, &qedf->flags)) {
|
|
rc = SUCCESS;
|
|
goto tmf_err;
|
|
}
|
|
|
|
if (lport->state != LPORT_ST_READY || !(lport->link_up)) {
|
|
QEDF_ERR(&(qedf->dbg_ctx), "link is not ready\n");
|
|
rc = FAILED;
|
|
goto tmf_err;
|
|
}
|
|
|
|
if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) {
|
|
if (!fcport->rdata)
|
|
QEDF_ERR(&qedf->dbg_ctx, "fcport %p is uploading.\n",
|
|
fcport);
|
|
else
|
|
QEDF_ERR(&qedf->dbg_ctx,
|
|
"fcport %p port_id=%06x is uploading.\n",
|
|
fcport, fcport->rdata->ids.port_id);
|
|
rc = FAILED;
|
|
goto tmf_err;
|
|
}
|
|
|
|
rc = qedf_execute_tmf(fcport, sc_cmd, tm_flags);
|
|
|
|
tmf_err:
|
|
kref_put(&rdata->kref, fc_rport_destroy);
|
|
return rc;
|
|
}
|
|
|
|
void qedf_process_tmf_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe,
|
|
struct qedf_ioreq *io_req)
|
|
{
|
|
struct fcoe_cqe_rsp_info *fcp_rsp;
|
|
|
|
clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags);
|
|
|
|
fcp_rsp = &cqe->cqe_info.rsp_info;
|
|
qedf_parse_fcp_rsp(io_req, fcp_rsp);
|
|
|
|
io_req->sc_cmd = NULL;
|
|
complete(&io_req->tm_done);
|
|
}
|
|
|
|
void qedf_process_unsol_compl(struct qedf_ctx *qedf, uint16_t que_idx,
|
|
struct fcoe_cqe *cqe)
|
|
{
|
|
unsigned long flags;
|
|
uint16_t pktlen = cqe->cqe_info.unsolic_info.pkt_len;
|
|
u32 payload_len, crc;
|
|
struct fc_frame_header *fh;
|
|
struct fc_frame *fp;
|
|
struct qedf_io_work *io_work;
|
|
u32 bdq_idx;
|
|
void *bdq_addr;
|
|
struct scsi_bd *p_bd_info;
|
|
|
|
p_bd_info = &cqe->cqe_info.unsolic_info.bd_info;
|
|
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_UNSOL,
|
|
"address.hi=%x, address.lo=%x, opaque_data.hi=%x, opaque_data.lo=%x, bdq_prod_idx=%u, len=%u\n",
|
|
le32_to_cpu(p_bd_info->address.hi),
|
|
le32_to_cpu(p_bd_info->address.lo),
|
|
le32_to_cpu(p_bd_info->opaque.fcoe_opaque.hi),
|
|
le32_to_cpu(p_bd_info->opaque.fcoe_opaque.lo),
|
|
qedf->bdq_prod_idx, pktlen);
|
|
|
|
bdq_idx = le32_to_cpu(p_bd_info->opaque.fcoe_opaque.lo);
|
|
if (bdq_idx >= QEDF_BDQ_SIZE) {
|
|
QEDF_ERR(&(qedf->dbg_ctx), "bdq_idx is out of range %d.\n",
|
|
bdq_idx);
|
|
goto increment_prod;
|
|
}
|
|
|
|
bdq_addr = qedf->bdq[bdq_idx].buf_addr;
|
|
if (!bdq_addr) {
|
|
QEDF_ERR(&(qedf->dbg_ctx), "bdq_addr is NULL, dropping "
|
|
"unsolicited packet.\n");
|
|
goto increment_prod;
|
|
}
|
|
|
|
if (qedf_dump_frames) {
|
|
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_UNSOL,
|
|
"BDQ frame is at addr=%p.\n", bdq_addr);
|
|
print_hex_dump(KERN_WARNING, "bdq ", DUMP_PREFIX_OFFSET, 16, 1,
|
|
(void *)bdq_addr, pktlen, false);
|
|
}
|
|
|
|
/* Allocate frame */
|
|
payload_len = pktlen - sizeof(struct fc_frame_header);
|
|
fp = fc_frame_alloc(qedf->lport, payload_len);
|
|
if (!fp) {
|
|
QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate fp.\n");
|
|
goto increment_prod;
|
|
}
|
|
|
|
/* Copy data from BDQ buffer into fc_frame struct */
|
|
fh = (struct fc_frame_header *)fc_frame_header_get(fp);
|
|
memcpy(fh, (void *)bdq_addr, pktlen);
|
|
|
|
QEDF_WARN(&qedf->dbg_ctx,
|
|
"Processing Unsolicated frame, src=%06x dest=%06x r_ctl=0x%x type=0x%x cmd=%02x\n",
|
|
ntoh24(fh->fh_s_id), ntoh24(fh->fh_d_id), fh->fh_r_ctl,
|
|
fh->fh_type, fc_frame_payload_op(fp));
|
|
|
|
/* Initialize the frame so libfc sees it as a valid frame */
|
|
crc = fcoe_fc_crc(fp);
|
|
fc_frame_init(fp);
|
|
fr_dev(fp) = qedf->lport;
|
|
fr_sof(fp) = FC_SOF_I3;
|
|
fr_eof(fp) = FC_EOF_T;
|
|
fr_crc(fp) = cpu_to_le32(~crc);
|
|
|
|
/*
|
|
* We need to return the frame back up to libfc in a non-atomic
|
|
* context
|
|
*/
|
|
io_work = mempool_alloc(qedf->io_mempool, GFP_ATOMIC);
|
|
if (!io_work) {
|
|
QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate "
|
|
"work for I/O completion.\n");
|
|
fc_frame_free(fp);
|
|
goto increment_prod;
|
|
}
|
|
memset(io_work, 0, sizeof(struct qedf_io_work));
|
|
|
|
INIT_WORK(&io_work->work, qedf_fp_io_handler);
|
|
|
|
/* Copy contents of CQE for deferred processing */
|
|
memcpy(&io_work->cqe, cqe, sizeof(struct fcoe_cqe));
|
|
|
|
io_work->qedf = qedf;
|
|
io_work->fp = fp;
|
|
|
|
queue_work_on(smp_processor_id(), qedf_io_wq, &io_work->work);
|
|
increment_prod:
|
|
spin_lock_irqsave(&qedf->hba_lock, flags);
|
|
|
|
/* Increment producer to let f/w know we've handled the frame */
|
|
qedf->bdq_prod_idx++;
|
|
|
|
/* Producer index wraps at uint16_t boundary */
|
|
if (qedf->bdq_prod_idx == 0xffff)
|
|
qedf->bdq_prod_idx = 0;
|
|
|
|
writew(qedf->bdq_prod_idx, qedf->bdq_primary_prod);
|
|
readw(qedf->bdq_primary_prod);
|
|
writew(qedf->bdq_prod_idx, qedf->bdq_secondary_prod);
|
|
readw(qedf->bdq_secondary_prod);
|
|
|
|
spin_unlock_irqrestore(&qedf->hba_lock, flags);
|
|
}
|