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Thu, 24 Oct 2024 07:04:34 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id 4ucRLILxGWcXHAAAD6G6ig (envelope-from ); Thu, 24 Oct 2024 07:04:34 +0000 Message-ID: <6a66c3ec-1b43-44ce-a3ab-65ec794a2dc6@suse.de> Date: Thu, 24 Oct 2024 09:04:34 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v5 09/14] scsi: fnic: Modify IO path to use FDLS To: Karan Tilak Kumar , sebaddel@cisco.com Cc: arulponn@cisco.com, djhawar@cisco.com, gcboffa@cisco.com, mkai2@cisco.com, satishkh@cisco.com, aeasi@cisco.com, jejb@linux.ibm.com, martin.petersen@oracle.com, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org References: <20241018161409.4442-1-kartilak@cisco.com> <20241018161409.4442-10-kartilak@cisco.com> Content-Language: en-US From: Hannes Reinecke In-Reply-To: <20241018161409.4442-10-kartilak@cisco.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Score: -4.30 X-Spamd-Result: default: False [-4.30 / 50.00]; BAYES_HAM(-3.00)[100.00%]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; FROM_HAS_DN(0.00)[]; FUZZY_BLOCKED(0.00)[rspamd.com]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; ARC_NA(0.00)[]; RCPT_COUNT_TWELVE(0.00)[12]; MIME_TRACE(0.00)[0:+]; TO_MATCH_ENVRCPT_ALL(0.00)[]; RCVD_TLS_ALL(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; TO_DN_SOME(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; MID_RHS_MATCH_FROM(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo,suse.de:mid,suse.de:email] X-Spam-Flag: NO X-Spam-Level: On 10/18/24 18:14, Karan Tilak Kumar wrote: > Modify IO path to use FDLS. > Add helper functions to process IOs. > Remove unused template functions. > Cleanup obsolete code. > Refactor old function definitions. > > Reviewed-by: Sesidhar Baddela > Reviewed-by: Arulprabhu Ponnusamy > Reviewed-by: Gian Carlo Boffa > Reviewed-by: Arun Easi > Signed-off-by: Karan Tilak Kumar > --- > Changes between v2 and v3: > Replace fnic->host with fnic->lport->host to prevent compilation > errors. > > Changes between v1 and v2: > Replace pr_err with printk. > Incorporate review comments by Hannes: > Restore usage of tagset iterators. > --- > drivers/scsi/fnic/fnic.h | 20 +- > drivers/scsi/fnic/fnic_io.h | 3 + > drivers/scsi/fnic/fnic_main.c | 5 +- > drivers/scsi/fnic/fnic_scsi.c | 846 +++++++++++++++++++-------------- > drivers/scsi/fnic/fnic_stats.h | 2 - > 5 files changed, 513 insertions(+), 363 deletions(-) > > diff --git a/drivers/scsi/fnic/fnic.h b/drivers/scsi/fnic/fnic.h > index 4f38cbae1994..c6fe9eec9a0c 100644 > --- a/drivers/scsi/fnic/fnic.h > +++ b/drivers/scsi/fnic/fnic.h > @@ -40,6 +40,7 @@ > #define FNIC_DFLT_IO_REQ 256 /* Default scsi_cmnd tag map entries */ > #define FNIC_DFLT_QUEUE_DEPTH 256 > #define FNIC_STATS_RATE_LIMIT 4 /* limit rate at which stats are pulled up */ > +#define LUN0_DELAY_TIME 9 > > /* > * Tag bits used for special requests. > @@ -472,7 +473,6 @@ int fnic_set_intr_mode_msix(struct fnic *fnic); > void fnic_free_intr(struct fnic *fnic); > int fnic_request_intr(struct fnic *fnic); > > -int fnic_send(struct fc_lport *, struct fc_frame *); > void fnic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf); > void fnic_handle_frame(struct work_struct *work); > void fnic_tport_event_handler(struct work_struct *work); > @@ -489,11 +489,9 @@ int fnic_abort_cmd(struct scsi_cmnd *); > int fnic_device_reset(struct scsi_cmnd *); > int fnic_eh_host_reset_handler(struct scsi_cmnd *sc); > int fnic_host_reset(struct Scsi_Host *shost); > -int fnic_reset(struct Scsi_Host *); > -void fnic_scsi_cleanup(struct fc_lport *); > -void fnic_scsi_abort_io(struct fc_lport *); > -void fnic_empty_scsi_cleanup(struct fc_lport *); > -void fnic_exch_mgr_reset(struct fc_lport *, u32, u32); > +void fnic_reset(struct Scsi_Host *shost); > +int fnic_issue_fc_host_lip(struct Scsi_Host *shost); > +void fnic_scsi_fcpio_reset(struct fnic *fnic); > int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do, unsigned int cq_index); > int fnic_wq_cmpl_handler(struct fnic *fnic, int); > int fnic_flogi_reg_handler(struct fnic *fnic, u32); > @@ -505,7 +503,8 @@ const char *fnic_state_to_str(unsigned int state); > void fnic_mq_map_queues_cpus(struct Scsi_Host *host); > void fnic_log_q_error(struct fnic *fnic); > void fnic_handle_link_event(struct fnic *fnic); > - > +void fnic_stats_debugfs_init(struct fnic *fnic); > +void fnic_stats_debugfs_remove(struct fnic *fnic); > int fnic_is_abts_pending(struct fnic *, struct scsi_cmnd *); > > void fnic_handle_fip_frame(struct work_struct *work); > @@ -526,5 +525,12 @@ int fnic_get_desc_by_devid(struct pci_dev *pdev, char **desc, > void fnic_fdls_link_status_change(struct fnic *fnic, int linkup); > void fnic_delete_fcp_tports(struct fnic *fnic); > void fnic_flush_tport_event_list(struct fnic *fnic); > +int fnic_count_ioreqs_wq(struct fnic *fnic, u32 hwq, u32 portid); > +unsigned int fnic_count_ioreqs(struct fnic *fnic, u32 portid); > +unsigned int fnic_count_all_ioreqs(struct fnic *fnic); > +unsigned int fnic_count_lun_ioreqs_wq(struct fnic *fnic, u32 hwq, > + struct scsi_device *device); > +unsigned int fnic_count_lun_ioreqs(struct fnic *fnic, > + struct scsi_device *device); > > #endif /* _FNIC_H_ */ > diff --git a/drivers/scsi/fnic/fnic_io.h b/drivers/scsi/fnic/fnic_io.h > index 6fe642cb387b..0d974e040ab7 100644 > --- a/drivers/scsi/fnic/fnic_io.h > +++ b/drivers/scsi/fnic/fnic_io.h > @@ -7,6 +7,7 @@ > #define _FNIC_IO_H_ > > #include > +#include "fnic_fdls.h" > > #define FNIC_DFLT_SG_DESC_CNT 32 > #define FNIC_MAX_SG_DESC_CNT 256 /* Maximum descriptors per sgl */ > @@ -41,6 +42,8 @@ enum fnic_ioreq_state { > }; > > struct fnic_io_req { > + struct fnic_iport_s *iport; > + struct fnic_tport_s *tport; > struct host_sg_desc *sgl_list; /* sgl list */ > void *sgl_list_alloc; /* sgl list address used for free */ > dma_addr_t sense_buf_pa; /* dma address for sense buffer*/ > diff --git a/drivers/scsi/fnic/fnic_main.c b/drivers/scsi/fnic/fnic_main.c > index 33c63d7a9787..dadbe47c0bbb 100644 > --- a/drivers/scsi/fnic/fnic_main.c > +++ b/drivers/scsi/fnic/fnic_main.c > @@ -85,9 +85,6 @@ module_param(fnic_max_qdepth, uint, S_IRUGO|S_IWUSR); > MODULE_PARM_DESC(fnic_max_qdepth, "Queue depth to report for each LUN"); > > static struct libfc_function_template fnic_transport_template = { > - .fcp_abort_io = fnic_empty_scsi_cleanup, > - .fcp_cleanup = fnic_empty_scsi_cleanup, > - .exch_mgr_reset = fnic_exch_mgr_reset > }; > The template is now empty; can't you delete it completely? > struct workqueue_struct *fnic_fip_queue; > @@ -162,7 +159,7 @@ static struct fc_function_template fnic_fc_functions = { > .show_starget_port_id = 1, > .show_rport_dev_loss_tmo = 1, > .set_rport_dev_loss_tmo = fnic_set_rport_dev_loss_tmo, > - .issue_fc_host_lip = fnic_reset, > + .issue_fc_host_lip = fnic_issue_fc_host_lip, > .get_fc_host_stats = fnic_get_stats, > .reset_fc_host_stats = fnic_reset_host_stats, > .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), > diff --git a/drivers/scsi/fnic/fnic_scsi.c b/drivers/scsi/fnic/fnic_scsi.c > index 74298f9a34e5..af729637ef2d 100644 > --- a/drivers/scsi/fnic/fnic_scsi.c > +++ b/drivers/scsi/fnic/fnic_scsi.c > @@ -25,9 +25,12 @@ > #include > #include > #include > +#include > #include "fnic_io.h" > #include "fnic.h" > > +static void fnic_cleanup_io(struct fnic *fnic, int exclude_id); > + > const char *fnic_state_str[] = { > [FNIC_IN_FC_MODE] = "FNIC_IN_FC_MODE", > [FNIC_IN_FC_TRANS_ETH_MODE] = "FNIC_IN_FC_TRANS_ETH_MODE", > @@ -65,6 +68,18 @@ static const char *fcpio_status_str[] = { > [FCPIO_LUNMAP_CHNG_PEND] = "FCPIO_LUNHMAP_CHNG_PEND", > }; > > +enum terminate_io_return { > + TERM_SUCCESS = 0, > + TERM_NO_SC = 1, > + TERM_IO_REQ_NOT_FOUND, > + TERM_ANOTHER_PORT, > + TERM_GSTATE, > + TERM_IO_BLOCKED, > + TERM_OUT_OF_WQ_DESC, > + TERM_TIMED_OUT, > + TERM_MISC, > +}; > + > const char *fnic_state_to_str(unsigned int state) > { > if (state >= ARRAY_SIZE(fnic_state_str) || !fnic_state_str[state]) > @@ -90,8 +105,6 @@ static const char *fnic_fcpio_status_to_str(unsigned int status) > return fcpio_status_str[status]; > } > > -static void fnic_cleanup_io(struct fnic *fnic); > - > /* > * Unmap the data buffer and sense buffer for an io_req, > * also unmap and free the device-private scatter/gather list. > @@ -114,6 +127,80 @@ static void fnic_release_ioreq_buf(struct fnic *fnic, > SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE); > } > > +int fnic_count_ioreqs_wq(struct fnic *fnic, u32 hwq, u32 portid) > +{ > + unsigned long flags = 0; > + int i = 0, count = 0; > + > + spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); > + for (i = 0; i != fnic->sw_copy_wq[hwq].ioreq_table_size; ++i) { > + if (fnic->sw_copy_wq[hwq].io_req_table[i] != NULL && > + (!portid > + || fnic->sw_copy_wq[hwq].io_req_table[i]->port_id == portid)) > + count++; > + } > + spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); > + > + return count; > +} > + > +unsigned int fnic_count_ioreqs(struct fnic *fnic, u32 portid) > +{ > + int i; > + unsigned int count = 0; > + > + for (i = 0; i < fnic->wq_copy_count; i++) > + count += fnic_count_ioreqs_wq(fnic, i, portid); > + > + return count; > +} > + > +unsigned int fnic_count_all_ioreqs(struct fnic *fnic) > +{ > + return fnic_count_ioreqs(fnic, 0); > +} > + > +unsigned int fnic_count_lun_ioreqs_wq(struct fnic *fnic, u32 hwq, > + struct scsi_device *device) > +{ > + struct fnic_io_req *io_req; > + int i; > + unsigned int count = 0; > + unsigned long flags = 0; > + > + spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); > + for (i = 0; i != fnic->sw_copy_wq[hwq].ioreq_table_size; ++i) { > + io_req = fnic->sw_copy_wq[hwq].io_req_table[i]; > + > + if (io_req != NULL) { > + struct scsi_cmnd *sc = > + scsi_host_find_tag(fnic->lport->host, io_req->tag); > + Be careful. 'scsi_host_find_tag()' finds requests on _all_ hwqs. But here you are interested in tags for a specific hwq only. > + if (!sc) > + continue; > + > + if (sc->device == device) > + count++; > + } > + } > + spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); > + > + return count; > +} > + And now this is pretty pointless. Please use the block layer blk_mq_tagset_busy_iter() to iterate over busy/active tags. > +unsigned int fnic_count_lun_ioreqs(struct fnic *fnic, > + struct scsi_device *device) > +{ > + int hwq; > + unsigned int count = 0; > + > + /*count if any pending IOs on this lun */ > + for (hwq = 0; hwq < fnic->wq_copy_count; hwq++) > + count += fnic_count_lun_ioreqs_wq(fnic, hwq, device); > + > + return count; > +} > + Same here. > /* Free up Copy Wq descriptors. Called with copy_wq lock held */ > static int free_wq_copy_descs(struct fnic *fnic, struct vnic_wq_copy *wq, unsigned int hwq) > { > @@ -179,12 +266,11 @@ int fnic_fw_reset_handler(struct fnic *fnic) > struct vnic_wq_copy *wq = &fnic->hw_copy_wq[0]; > int ret = 0; > unsigned long flags; > + unsigned int ioreq_count; > > /* indicate fwreset to io path */ > fnic_set_state_flags(fnic, FNIC_FLAGS_FWRESET); > - > - fnic_free_txq(&fnic->frame_queue); > - fnic_free_txq(&fnic->tx_queue); > + ioreq_count = fnic_count_all_ioreqs(fnic); > > /* wait for io cmpl */ > while (atomic_read(&fnic->in_flight)) > @@ -231,10 +317,10 @@ int fnic_flogi_reg_handler(struct fnic *fnic, u32 fc_id) > { > struct vnic_wq_copy *wq = &fnic->hw_copy_wq[0]; > enum fcpio_flogi_reg_format_type format; > - struct fc_lport *lp = fnic->lport; > u8 gw_mac[ETH_ALEN]; > int ret = 0; > unsigned long flags; > + struct fnic_iport_s *iport = &fnic->iport; > > spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); > > @@ -246,28 +332,23 @@ int fnic_flogi_reg_handler(struct fnic *fnic, u32 fc_id) > goto flogi_reg_ioreq_end; > } > > - if (fnic->ctlr.map_dest) { > - eth_broadcast_addr(gw_mac); > - format = FCPIO_FLOGI_REG_DEF_DEST; > - } else { > - memcpy(gw_mac, fnic->ctlr.dest_addr, ETH_ALEN); > - format = FCPIO_FLOGI_REG_GW_DEST; > - } > + memcpy(gw_mac, fnic->iport.fcfmac, ETH_ALEN); > + format = FCPIO_FLOGI_REG_GW_DEST; > > - if ((fnic->config.flags & VFCF_FIP_CAPABLE) && !fnic->ctlr.map_dest) { > + if (fnic->config.flags & VFCF_FIP_CAPABLE) { > fnic_queue_wq_copy_desc_fip_reg(wq, SCSI_NO_TAG, > fc_id, gw_mac, > - fnic->data_src_addr, > - lp->r_a_tov, lp->e_d_tov); > - FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, > - "FLOGI FIP reg issued fcid %x src %pM dest %pM\n", > - fc_id, fnic->data_src_addr, gw_mac); > + fnic->iport.fpma, > + iport->r_a_tov, iport->e_d_tov); > + FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, > + "FLOGI FIP reg issued fcid: 0x%x src %p dest %p\n", > + fc_id, fnic->iport.fpma, gw_mac); > } else { > fnic_queue_wq_copy_desc_flogi_reg(wq, SCSI_NO_TAG, > format, fc_id, gw_mac); > FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, > - "FLOGI reg issued fcid 0x%x map %d dest 0x%p\n", > - fc_id, fnic->ctlr.map_dest, gw_mac); > + "FLOGI reg issued fcid 0x%x dest %p\n", > + fc_id, gw_mac); > } > > atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); > @@ -295,13 +376,17 @@ static inline int fnic_queue_wq_copy_desc(struct fnic *fnic, > { > struct scatterlist *sg; > struct fc_rport *rport = starget_to_rport(scsi_target(sc->device)); > - struct fc_rport_libfc_priv *rp = rport->dd_data; > struct host_sg_desc *desc; > struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; > unsigned int i; > int flags; > u8 exch_flags; > struct scsi_lun fc_lun; > + struct fnic_tport_s *tport; > + struct rport_dd_data_s *rdd_data; > + > + rdd_data = rport->dd_data; > + tport = rdd_data->tport; > > if (sg_count) { > /* For each SGE, create a device desc entry */ > @@ -356,7 +441,7 @@ static inline int fnic_queue_wq_copy_desc(struct fnic *fnic, > > exch_flags = 0; > if ((fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) && > - (rp->flags & FC_RP_FLAGS_RETRY)) > + (tport->tgt_flags & FDLS_FC_RP_FLAGS_RETRY)) > exch_flags |= FCPIO_ICMND_SRFLAG_RETRY; > > fnic_queue_wq_copy_desc_icmnd_16(wq, mqtag, > @@ -371,8 +456,8 @@ static inline int fnic_queue_wq_copy_desc(struct fnic *fnic, > sc->cmnd, sc->cmd_len, > scsi_bufflen(sc), > fc_lun.scsi_lun, io_req->port_id, > - rport->maxframe_size, rp->r_a_tov, > - rp->e_d_tov); > + tport->max_payload_size, > + tport->r_a_tov, tport->e_d_tov); > > atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); > if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > > @@ -388,10 +473,10 @@ int fnic_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *sc) > struct request *const rq = scsi_cmd_to_rq(sc); > uint32_t mqtag = 0; > void (*done)(struct scsi_cmnd *) = scsi_done; > - struct fc_lport *lp = shost_priv(sc->device->host); > struct fc_rport *rport; > struct fnic_io_req *io_req = NULL; > - struct fnic *fnic = lport_priv(lp); > + struct fnic *fnic = *((struct fnic **) shost_priv(sc->device->host)); > + struct fnic_iport_s *iport = NULL; > struct fnic_stats *fnic_stats = &fnic->fnic_stats; > struct vnic_wq_copy *wq; > int ret = 1; > @@ -400,32 +485,14 @@ int fnic_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *sc) > unsigned long flags = 0; > unsigned long ptr; > int io_lock_acquired = 0; > - struct fc_rport_libfc_priv *rp; > uint16_t hwq = 0; > - > - mqtag = blk_mq_unique_tag(rq); > - spin_lock_irqsave(&fnic->fnic_lock, flags); > - > - if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED))) { > - spin_unlock_irqrestore(&fnic->fnic_lock, flags); > - FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, > - "fnic IO blocked flags: 0x%lx. Returning SCSI_MLQUEUE_HOST_BUSY\n", > - fnic->state_flags); > - return SCSI_MLQUEUE_HOST_BUSY; > - } > - > - if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_FWRESET))) { > - spin_unlock_irqrestore(&fnic->fnic_lock, flags); > - FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, > - "fnic flags: 0x%lx. Returning SCSI_MLQUEUE_HOST_BUSY\n", > - fnic->state_flags); > - return SCSI_MLQUEUE_HOST_BUSY; > - } > + struct fnic_tport_s *tport = NULL; > + struct rport_dd_data_s *rdd_data; > + uint16_t lun0_delay = 0; > > rport = starget_to_rport(scsi_target(sc->device)); > if (!rport) { > - spin_unlock_irqrestore(&fnic->fnic_lock, flags); > - FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, > + FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, > "returning DID_NO_CONNECT for IO as rport is NULL\n"); > sc->result = DID_NO_CONNECT << 16; > done(sc); > @@ -434,50 +501,95 @@ int fnic_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *sc) > > ret = fc_remote_port_chkready(rport); > if (ret) { > - spin_unlock_irqrestore(&fnic->fnic_lock, flags); > - FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, > + FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, > "rport is not ready\n"); > - atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); > sc->result = ret; > done(sc); > return 0; > } > > - rp = rport->dd_data; > - if (!rp || rp->rp_state == RPORT_ST_DELETE) { > - spin_unlock_irqrestore(&fnic->fnic_lock, flags); > - FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, > - "rport 0x%x removed, returning DID_NO_CONNECT\n", > - rport->port_id); > + mqtag = blk_mq_unique_tag(rq); > + spin_lock_irqsave(&fnic->fnic_lock, flags); > + iport = &fnic->iport; > > - atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); > - sc->result = DID_NO_CONNECT<<16; > + if (iport->state != FNIC_IPORT_STATE_READY) { > + spin_unlock_irqrestore(&fnic->fnic_lock, flags); > + FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, > + "returning DID_NO_CONNECT for IO as iport state: %d\n", > + iport->state); > + sc->result = DID_NO_CONNECT << 16; > done(sc); > return 0; > } > > - if (rp->rp_state != RPORT_ST_READY) { > - spin_unlock_irqrestore(&fnic->fnic_lock, flags); > - FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, > - "rport 0x%x in state 0x%x, returning DID_IMM_RETRY\n", > - rport->port_id, rp->rp_state); > + /* fc_remote_port_add() may have added the tport to > + * fc_transport but dd_data not yet set > + */ > + rdd_data = rport->dd_data; > + tport = rdd_data->tport; > + if (!tport || (rdd_data->iport != iport)) { > + FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, > + "dd_data not yet set in SCSI for rport portid: 0x%x\n", > + rport->port_id); > + tport = fnic_find_tport_by_fcid(iport, rport->port_id); > + if (!tport) { > + spin_unlock_irqrestore(&fnic->fnic_lock, flags); > + FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, > + "returning DID_BUS_BUSY for IO as tport not found for: 0x%x\n", > + rport->port_id); > + sc->result = DID_BUS_BUSY << 16; > + done(sc); > + return 0; > + } > + > + /* Re-assign same params as in fnic_fdls_add_tport */ > + rport->maxframe_size = FNIC_FC_MAX_PAYLOAD_LEN; > + rport->supported_classes = > + FC_COS_CLASS3 | FC_RPORT_ROLE_FCP_TARGET; > + /* the dd_data is allocated by fctransport of size dd_fcrport_size */ > + rdd_data = rport->dd_data; > + rdd_data->tport = tport; > + rdd_data->iport = iport; > + tport->rport = rport; > + tport->flags |= FNIC_FDLS_SCSI_REGISTERED; > + } > > - sc->result = DID_IMM_RETRY << 16; > + if ((tport->state != FDLS_TGT_STATE_READY) > + && (tport->state != FDLS_TGT_STATE_ADISC)) { > + spin_unlock_irqrestore(&fnic->fnic_lock, flags); > + FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, > + "returning DID_NO_CONNECT for IO as tport state: %d\n", > + tport->state); > + sc->result = DID_NO_CONNECT << 16; > done(sc); > return 0; > } > > - if (lp->state != LPORT_ST_READY || !(lp->link_up)) { > + atomic_inc(&fnic->in_flight); > + atomic_inc(&tport->in_flight); > + > + if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED))) { > + atomic_dec(&fnic->in_flight); > + atomic_dec(&tport->in_flight); > + spin_unlock_irqrestore(&fnic->fnic_lock, flags); > + return SCSI_MLQUEUE_HOST_BUSY; > + } > + > + if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_FWRESET))) { > spin_unlock_irqrestore(&fnic->fnic_lock, flags); > FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, > - "state not ready: %d/link not up: %d Returning HOST_BUSY\n", > - lp->state, lp->link_up); > + "fnic flags FW reset: 0x%lx. Returning SCSI_MLQUEUE_HOST_BUSY\n", > + fnic->state_flags); > return SCSI_MLQUEUE_HOST_BUSY; > } > > - atomic_inc(&fnic->in_flight); > + if (!tport->lun0_delay) { > + lun0_delay = 1; > + tport->lun0_delay++; > + } > > spin_unlock_irqrestore(&fnic->fnic_lock, flags); > + > fnic_priv(sc)->state = FNIC_IOREQ_NOT_INITED; > fnic_priv(sc)->flags = FNIC_NO_FLAGS; > > @@ -499,6 +611,7 @@ int fnic_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *sc) > goto out; > } > > + io_req->tport = tport; > /* Determine the type of scatter/gather list we need */ > io_req->sgl_cnt = sg_count; > io_req->sgl_type = FNIC_SGL_CACHE_DFLT; > @@ -575,6 +688,7 @@ int fnic_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *sc) > mempool_free(io_req, fnic->io_req_pool); > } > atomic_dec(&fnic->in_flight); > + atomic_dec(&tport->in_flight); > return ret; > } else { > atomic64_inc(&fnic_stats->io_stats.active_ios); > @@ -602,6 +716,14 @@ int fnic_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *sc) > spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); > > atomic_dec(&fnic->in_flight); > + atomic_dec(&tport->in_flight); > + > + if (lun0_delay) { > + FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, > + "LUN0 delay\n"); > + mdelay(LUN0_DELAY_TIME); > + } > + > return ret; > } > > @@ -625,7 +747,7 @@ static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic, > atomic64_inc(&reset_stats->fw_reset_completions); > > /* Clean up all outstanding io requests */ > - fnic_cleanup_io(fnic); > + fnic_cleanup_io(fnic, SCSI_NO_TAG); > > atomic64_set(&fnic->fnic_stats.fw_stats.active_fw_reqs, 0); > atomic64_set(&fnic->fnic_stats.io_stats.active_ios, 0); > @@ -646,12 +768,6 @@ static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic, > "reset failed with header status: %s\n", > fnic_fcpio_status_to_str(hdr_status)); > > - /* > - * Unable to change to eth mode, cannot send out flogi > - * Change state to fc mode, so that subsequent Flogi > - * requests from libFC will cause more attempts to > - * reset the firmware. Free the cached flogi > - */ > fnic->state = FNIC_IN_FC_MODE; > atomic64_inc(&reset_stats->fw_reset_failures); > ret = -1; > @@ -664,15 +780,14 @@ static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic, > ret = -1; > } > > - /* Thread removing device blocks till firmware reset is complete */ > - if (fnic->remove_wait) > - complete(fnic->remove_wait); > + if (fnic->fw_reset_done) > + complete(fnic->fw_reset_done); > > /* > * If fnic is being removed, or fw reset failed > * free the flogi frame. Else, send it out > */ > - if (fnic->remove_wait || ret) { > + if (ret) { > spin_unlock_irqrestore(&fnic->fnic_lock, flags); > fnic_free_txq(&fnic->tx_queue); > goto reset_cmpl_handler_end; > @@ -711,12 +826,12 @@ static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic, > /* Check flogi registration completion status */ > if (!hdr_status) { > FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, > - "flog reg succeeded\n"); > + "FLOGI reg succeeded\n"); > fnic->state = FNIC_IN_FC_MODE; > } else { > FNIC_SCSI_DBG(KERN_DEBUG, > fnic->lport->host, fnic->fnic_num, > - "fnic flogi reg :failed %s\n", > + "fnic flogi reg failed: %s\n", > fnic_fcpio_status_to_str(hdr_status)); > fnic->state = FNIC_IN_ETH_MODE; > ret = -1; > @@ -1023,15 +1138,6 @@ static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic, unsigned int cq_ind > jiffies_to_msecs(jiffies - start_time)), > desc, cmd_trace, fnic_flags_and_state(sc)); > > - if (sc->sc_data_direction == DMA_FROM_DEVICE) { > - fnic->lport->host_stats.fcp_input_requests++; > - fnic->fcp_input_bytes += xfer_len; > - } else if (sc->sc_data_direction == DMA_TO_DEVICE) { > - fnic->lport->host_stats.fcp_output_requests++; > - fnic->fcp_output_bytes += xfer_len; > - } else > - fnic->lport->host_stats.fcp_control_requests++; > - > /* Call SCSI completion function to complete the IO */ > scsi_done(sc); > > @@ -1414,8 +1520,8 @@ static bool fnic_cleanup_io_iter(struct scsi_cmnd *sc, void *data) > struct request *const rq = scsi_cmd_to_rq(sc); > struct fnic *fnic = data; > struct fnic_io_req *io_req; > - unsigned long flags = 0; > unsigned long start_time = 0; > + unsigned long flags; > struct fnic_stats *fnic_stats = &fnic->fnic_stats; > uint16_t hwq = 0; > int tag; > @@ -1439,7 +1545,7 @@ static bool fnic_cleanup_io_iter(struct scsi_cmnd *sc, void *data) > } > > if ((fnic_priv(sc)->flags & FNIC_DEVICE_RESET) && > - !(fnic_priv(sc)->flags & FNIC_DEV_RST_DONE)) { > + !(fnic_priv(sc)->flags & FNIC_DEV_RST_DONE)) { > /* > * We will be here only when FW completes reset > * without sending completions for outstanding ios. > @@ -1449,6 +1555,7 @@ static bool fnic_cleanup_io_iter(struct scsi_cmnd *sc, void *data) > complete(io_req->dr_done); > else if (io_req && io_req->abts_done) > complete(io_req->abts_done); > + > spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); > return true; > } else if (fnic_priv(sc)->flags & FNIC_DEVICE_RESET) { > @@ -1458,19 +1565,19 @@ static bool fnic_cleanup_io_iter(struct scsi_cmnd *sc, void *data) > > fnic_priv(sc)->io_req = NULL; > io_req->sc = NULL; > + start_time = io_req->start_time; > spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); > > /* > * If there is a scsi_cmnd associated with this io_req, then > * free the corresponding state > */ > - start_time = io_req->start_time; > fnic_release_ioreq_buf(fnic, io_req, sc); > mempool_free(io_req, fnic->io_req_pool); > > sc->result = DID_TRANSPORT_DISRUPTED << 16; > FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, > - "mqtag:0x%x tag: 0x%x sc:0x%p duration = %lu DID_TRANSPORT_DISRUPTED\n", > + "mqtag: 0x%x tag: 0x%x sc: 0x%p duration = %lu DID_TRANSPORT_DISRUPTED\n", > mqtag, tag, sc, (jiffies - start_time)); > > if (atomic64_read(&fnic->io_cmpl_skip)) > @@ -1479,23 +1586,60 @@ static bool fnic_cleanup_io_iter(struct scsi_cmnd *sc, void *data) > atomic64_inc(&fnic_stats->io_stats.io_completions); > > FNIC_TRACE(fnic_cleanup_io, > - sc->device->host->host_no, tag, sc, > - jiffies_to_msecs(jiffies - start_time), > - 0, ((u64)sc->cmnd[0] << 32 | > - (u64)sc->cmnd[2] << 24 | > - (u64)sc->cmnd[3] << 16 | > - (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), > - fnic_flags_and_state(sc)); > - > + sc->device->host->host_no, tag, sc, > + jiffies_to_msecs(jiffies - start_time), > + 0, ((u64) sc->cmnd[0] << 32 | > + (u64) sc->cmnd[2] << 24 | > + (u64) sc->cmnd[3] << 16 | > + (u64) sc->cmnd[4] << 8 | sc->cmnd[5]), > + (((u64) fnic_priv(sc)->flags << 32) | fnic_priv(sc)-> > + state)); > + > + /* Complete the command to SCSI */ > scsi_done(sc); > - > return true; > } > > -static void fnic_cleanup_io(struct fnic *fnic) > +static void fnic_cleanup_io(struct fnic *fnic, int exclude_id) > { > + unsigned int io_count = 0; > + unsigned long flags; > + struct fnic_io_req *io_req = NULL; > + struct scsi_cmnd *sc = NULL; > + > + io_count = fnic_count_all_ioreqs(fnic); > + FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, > + "Outstanding ioreq count: %d active io count: %lld Waiting\n", > + io_count, > + atomic64_read(&fnic->fnic_stats.io_stats.active_ios)); > + > scsi_host_busy_iter(fnic->lport->host, > - fnic_cleanup_io_iter, fnic); > + fnic_cleanup_io_iter, fnic); > + > + /* with sg3utils device reset, SC needs to be retrieved from ioreq */ > + spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); > + io_req = fnic->sw_copy_wq[0].io_req_table[fnic->fnic_max_tag_id]; > + if (io_req) { > + sc = io_req->sc; > + if (sc) { > + if ((fnic_priv(sc)->flags & FNIC_DEVICE_RESET) > + && !(fnic_priv(sc)->flags & FNIC_DEV_RST_DONE)) { > + fnic_priv(sc)->flags |= FNIC_DEV_RST_DONE; > + if (io_req && io_req->dr_done) > + complete(io_req->dr_done); > + } > + } > + } > + spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); > + > + while ((io_count = fnic_count_all_ioreqs(fnic))) { > + FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, > + "Outstanding ioreq count: %d active io count: %lld Waiting\n", > + io_count, > + atomic64_read(&fnic->fnic_stats.io_stats.active_ios)); > + > + schedule_timeout(msecs_to_jiffies(100)); > + } > } > > void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq, > @@ -1567,10 +1711,13 @@ static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag, > struct vnic_wq_copy *wq = &fnic->hw_copy_wq[hwq]; > struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; > unsigned long flags; > + struct fnic_tport_s *tport = io_req->tport; > > spin_lock_irqsave(&fnic->fnic_lock, flags); > if (unlikely(fnic_chk_state_flags_locked(fnic, > FNIC_FLAGS_IO_BLOCKED))) { > + atomic_dec(&fnic->in_flight); > + atomic_dec(&tport->in_flight); > spin_unlock_irqrestore(&fnic->fnic_lock, flags); > return 1; > } else > @@ -1585,6 +1732,7 @@ static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag, > if (!vnic_wq_copy_desc_avail(wq)) { > spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); > atomic_dec(&fnic->in_flight); > + atomic_dec(&tport->in_flight); > FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, > "fnic_queue_abort_io_req: failure: no descriptors\n"); > atomic64_inc(&misc_stats->abts_cpwq_alloc_failures); > @@ -1619,20 +1767,24 @@ static bool fnic_rport_abort_io_iter(struct scsi_cmnd *sc, void *data) > struct fnic *fnic = iter_data->fnic; > int abt_tag = 0; > struct fnic_io_req *io_req; > - unsigned long flags; > struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats; > struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats; > struct scsi_lun fc_lun; > enum fnic_ioreq_state old_ioreq_state; > uint16_t hwq = 0; > + unsigned long flags; > > abt_tag = blk_mq_unique_tag(rq); > hwq = blk_mq_unique_tag_to_hwq(abt_tag); > > - spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); > + if (!sc) { > + FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, > + "sc is NULL abt_tag: 0x%x hwq: %d\n", abt_tag, hwq); > + return true; > + } > > + spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); > io_req = fnic_priv(sc)->io_req; > - > if (!io_req || io_req->port_id != iter_data->port_id) { > spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); > return true; > @@ -1655,37 +1807,38 @@ static bool fnic_rport_abort_io_iter(struct scsi_cmnd *sc, void *data) > spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); > return true; > } > + > if (io_req->abts_done) { > shost_printk(KERN_ERR, fnic->lport->host, > - "fnic_rport_exch_reset: io_req->abts_done is set " > - "state is %s\n", > + "fnic_rport_exch_reset: io_req->abts_done is set state is %s\n", > fnic_ioreq_state_to_str(fnic_priv(sc)->state)); > } > > if (!(fnic_priv(sc)->flags & FNIC_IO_ISSUED)) { > shost_printk(KERN_ERR, fnic->lport->host, > - "rport_exch_reset " > - "IO not yet issued %p tag 0x%x flags " > - "%x state %d\n", > - sc, abt_tag, fnic_priv(sc)->flags, fnic_priv(sc)->state); > + "rport_exch_reset IO not yet issued %p abt_tag 0x%x", > + sc, abt_tag); > + shost_printk(KERN_ERR, fnic->lport->host, > + "flags %x state %d\n", fnic_priv(sc)->flags, > + fnic_priv(sc)->state); > } > old_ioreq_state = fnic_priv(sc)->state; > fnic_priv(sc)->state = FNIC_IOREQ_ABTS_PENDING; > fnic_priv(sc)->abts_status = FCPIO_INVALID_CODE; > + > if (fnic_priv(sc)->flags & FNIC_DEVICE_RESET) { > atomic64_inc(&reset_stats->device_reset_terminates); > abt_tag |= FNIC_TAG_DEV_RST; > } > FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, > - "fnic_rport_exch_reset dev rst sc 0x%p\n", sc); > - BUG_ON(io_req->abts_done); > - > + "fnic_rport_exch_reset: dev rst sc 0x%p\n", sc); > + WARN_ON_ONCE(io_req->abts_done); > FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, > "fnic_rport_reset_exch: Issuing abts\n"); > > spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); > > - /* Now queue the abort command to firmware */ > + /* Queue the abort command to firmware */ > int_to_scsilun(sc->device->lun, &fc_lun); > > if (fnic_queue_abort_io_req(fnic, abt_tag, > @@ -1714,11 +1867,14 @@ static bool fnic_rport_abort_io_iter(struct scsi_cmnd *sc, void *data) > atomic64_inc(&term_stats->terminates); > iter_data->term_cnt++; > } > + > return true; > } > > void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id) > { > + unsigned int io_count = 0; > + unsigned long flags; > struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats; > struct fnic_rport_abort_io_iter_data iter_data = { > .fnic = fnic, > @@ -1726,53 +1882,75 @@ void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id) > .term_cnt = 0, > }; > > - FNIC_SCSI_DBG(KERN_DEBUG, > - fnic->lport->host, fnic->fnic_num, > - "fnic_rport_exch_reset called portid 0x%06x\n", > - port_id); > + FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, > + "fnic rport exchange reset for tport: 0x%06x\n", > + port_id); > > if (fnic->in_remove) > return; > > + io_count = fnic_count_ioreqs(fnic, port_id); > + FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, > + "Starting terminates: rport:0x%x portid-io-count: %d active-io-count: %lld\n", > + port_id, io_count, > + atomic64_read(&fnic->fnic_stats.io_stats.active_ios)); > + > + spin_lock_irqsave(&fnic->fnic_lock, flags); > + atomic_inc(&fnic->in_flight); > + if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED))) { > + atomic_dec(&fnic->in_flight); > + spin_unlock_irqrestore(&fnic->fnic_lock, flags); > + return; > + } > + spin_unlock_irqrestore(&fnic->fnic_lock, flags); > + > scsi_host_busy_iter(fnic->lport->host, fnic_rport_abort_io_iter, > &iter_data); > + > if (iter_data.term_cnt > atomic64_read(&term_stats->max_terminates)) > atomic64_set(&term_stats->max_terminates, iter_data.term_cnt); > > + atomic_dec(&fnic->in_flight); > + > + while ((io_count = fnic_count_ioreqs(fnic, port_id))) > + schedule_timeout(msecs_to_jiffies(1000)); > + That really feels overly complex. You send the aborts with the previous 'scsi_host_busy_iter()' call, and now you wait for the I/Os to complete. But you already have an atomic counter for I/Os in flight to the tport; can't you just wait for that counter to drop to zero? > + FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, > + "rport: 0x%x remaining portid-io-count: %d ", > + port_id, io_count); > } > > void fnic_terminate_rport_io(struct fc_rport *rport) > { > - struct fc_rport_libfc_priv *rdata; > - struct fc_lport *lport; > - struct fnic *fnic; > + struct fnic_tport_s *tport; > + struct rport_dd_data_s *rdd_data; > + struct fnic_iport_s *iport = NULL; > + struct fnic *fnic = NULL; > > if (!rport) { > - printk(KERN_ERR "fnic_terminate_rport_io: rport is NULL\n"); > + pr_err("rport is NULL\n"); > return; > } > - rdata = rport->dd_data; > > - if (!rdata) { > - printk(KERN_ERR "fnic_terminate_rport_io: rdata is NULL\n"); > - return; > - } > - lport = rdata->local_port; > - > - if (!lport) { > - printk(KERN_ERR "fnic_terminate_rport_io: lport is NULL\n"); > - return; > + rdd_data = rport->dd_data; > + if (rdd_data) { > + tport = rdd_data->tport; > + if (!tport) { > + pr_err( > + "term rport io called after tport is deleted. Returning 0x%8x\n", > + rport->port_id); > + } else { > + pr_err( > + "term rport io called after tport is set 0x%8x\n", > + rport->port_id); > + pr_err( > + "tport maybe rediscovered\n"); > + > + iport = (struct fnic_iport_s *) tport->iport; > + fnic = iport->fnic; > + fnic_rport_exch_reset(fnic, rport->port_id); > + } > } > - fnic = lport_priv(lport); > - FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, > - "wwpn 0x%llx, wwnn0x%llx, rport 0x%p, portid 0x%06x\n", > - rport->port_name, rport->node_name, rport, > - rport->port_id); > - > - if (fnic->in_remove) > - return; > - > - fnic_rport_exch_reset(fnic, rport->port_id); > } > > /* > @@ -1783,10 +1961,12 @@ void fnic_terminate_rport_io(struct fc_rport *rport) > int fnic_abort_cmd(struct scsi_cmnd *sc) > { > struct request *const rq = scsi_cmd_to_rq(sc); > - struct fc_lport *lp; > + struct fnic_iport_s *iport; > + struct fnic_tport_s *tport; > struct fnic *fnic; > struct fnic_io_req *io_req = NULL; > struct fc_rport *rport; > + struct rport_dd_data_s *rdd_data; > unsigned long flags; > unsigned long start_time = 0; > int ret = SUCCESS; > @@ -1806,11 +1986,11 @@ int fnic_abort_cmd(struct scsi_cmnd *sc) > fc_block_scsi_eh(sc); > > /* Get local-port, check ready and link up */ > - lp = shost_priv(sc->device->host); > - > - fnic = lport_priv(lp); > + fnic = *((struct fnic **) shost_priv(sc->device->host)); > > spin_lock_irqsave(&fnic->fnic_lock, flags); > + iport = &fnic->iport; > + > fnic_stats = &fnic->fnic_stats; > abts_stats = &fnic->fnic_stats.abts_stats; > term_stats = &fnic->fnic_stats.term_stats; > @@ -1821,7 +2001,43 @@ int fnic_abort_cmd(struct scsi_cmnd *sc) > > fnic_priv(sc)->flags = FNIC_NO_FLAGS; > > - if (lp->state != LPORT_ST_READY || !(lp->link_up)) { > + rdd_data = rport->dd_data; > + tport = rdd_data->tport; > + > + if (!tport) { > + FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, > + "Abort cmd called after tport delete! rport fcid: 0x%x", > + rport->port_id); > + FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, > + "lun: %llu hwq: 0x%x mqtag: 0x%x Op: 0x%x flags: 0x%x\n", > + sc->device->lun, hwq, mqtag, > + sc->cmnd[0], fnic_priv(sc)->flags); > + ret = FAILED; > + spin_unlock_irqrestore(&fnic->fnic_lock, flags); > + goto fnic_abort_cmd_end; > + } > + > + FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, > + "Abort cmd called rport fcid: 0x%x lun: %llu hwq: 0x%x mqtag: 0x%x", > + rport->port_id, sc->device->lun, hwq, mqtag); > + > + FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, > + "Op: 0x%x flags: 0x%x\n", > + sc->cmnd[0], > + fnic_priv(sc)->flags); > + > + if (iport->state != FNIC_IPORT_STATE_READY) { > + FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, > + "iport NOT in READY state"); > + ret = FAILED; > + spin_unlock_irqrestore(&fnic->fnic_lock, flags); > + goto fnic_abort_cmd_end; > + } > + > + if ((tport->state != FDLS_TGT_STATE_READY) && > + (tport->state != FDLS_TGT_STATE_ADISC)) { > + FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, > + "tport state: %d\n", tport->state); > ret = FAILED; > spin_unlock_irqrestore(&fnic->fnic_lock, flags); > goto fnic_abort_cmd_end; > @@ -1843,6 +2059,7 @@ int fnic_abort_cmd(struct scsi_cmnd *sc) > spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); > io_req = fnic_priv(sc)->io_req; > if (!io_req) { > + ret = FAILED; > spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); > goto fnic_abort_cmd_end; > } > @@ -1893,7 +2110,6 @@ int fnic_abort_cmd(struct scsi_cmnd *sc) > if (fc_remote_port_chkready(rport) == 0) > task_req = FCPIO_ITMF_ABT_TASK; > else { > - atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); > task_req = FCPIO_ITMF_ABT_TASK_TERM; > } > > @@ -2027,6 +2243,7 @@ static inline int fnic_queue_dr_io_req(struct fnic *fnic, > unsigned long flags; > uint16_t hwq = 0; > uint32_t tag = 0; > + struct fnic_tport_s *tport = io_req->tport; > > tag = io_req->tag; > hwq = blk_mq_unique_tag_to_hwq(tag); > @@ -2037,8 +2254,10 @@ static inline int fnic_queue_dr_io_req(struct fnic *fnic, > FNIC_FLAGS_IO_BLOCKED))) { > spin_unlock_irqrestore(&fnic->fnic_lock, flags); > return FAILED; > - } else > + } else { > atomic_inc(&fnic->in_flight); > + atomic_inc(&tport->in_flight); > + } > spin_unlock_irqrestore(&fnic->fnic_lock, flags); > > spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); > @@ -2072,6 +2291,7 @@ static inline int fnic_queue_dr_io_req(struct fnic *fnic, > lr_io_req_end: > spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); > atomic_dec(&fnic->in_flight); > + atomic_inc(&tport->in_flight); > > return ret; > } > @@ -2274,11 +2494,11 @@ static int fnic_clean_pending_aborts(struct fnic *fnic, > int fnic_device_reset(struct scsi_cmnd *sc) > { > struct request *rq = scsi_cmd_to_rq(sc); > - struct fc_lport *lp; > struct fnic *fnic; > struct fnic_io_req *io_req = NULL; > struct fc_rport *rport; > int status; > + int count = 0; > int ret = FAILED; > unsigned long flags; > unsigned long start_time = 0; > @@ -2289,31 +2509,61 @@ int fnic_device_reset(struct scsi_cmnd *sc) > DECLARE_COMPLETION_ONSTACK(tm_done); > bool new_sc = 0; > uint16_t hwq = 0; > + struct fnic_iport_s *iport = NULL; > + struct rport_dd_data_s *rdd_data; > + struct fnic_tport_s *tport; > + u32 old_soft_reset_count; > + u32 old_link_down_cnt; > + int exit_dr = 0; > > /* Wait for rport to unblock */ > fc_block_scsi_eh(sc); > > /* Get local-port, check ready and link up */ > - lp = shost_priv(sc->device->host); > + fnic = *((struct fnic **) shost_priv(sc->device->host)); > + iport = &fnic->iport; > > - fnic = lport_priv(lp); > fnic_stats = &fnic->fnic_stats; > reset_stats = &fnic->fnic_stats.reset_stats; > > atomic64_inc(&reset_stats->device_resets); > > rport = starget_to_rport(scsi_target(sc->device)); > + > + spin_lock_irqsave(&fnic->fnic_lock, flags); > FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, > - "fcid: 0x%x lun: 0x%llx hwq: %d mqtag: 0x%x flags: 0x%x Device reset\n", > + "fcid: 0x%x lun: %llu hwq: %d mqtag: 0x%x flags: 0x%x Device reset\n", > rport->port_id, sc->device->lun, hwq, mqtag, > fnic_priv(sc)->flags); > > - if (lp->state != LPORT_ST_READY || !(lp->link_up)) > + rdd_data = rport->dd_data; > + tport = rdd_data->tport; > + if (!tport) { > + FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, > + "Dev rst called after tport delete! rport fcid: 0x%x lun: %llu\n", > + rport->port_id, sc->device->lun); > + spin_unlock_irqrestore(&fnic->fnic_lock, flags); > + goto fnic_device_reset_end; > + } > + > + if (iport->state != FNIC_IPORT_STATE_READY) { > + FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, > + "iport NOT in READY state"); > + spin_unlock_irqrestore(&fnic->fnic_lock, flags); > goto fnic_device_reset_end; > + } > + > + if ((tport->state != FDLS_TGT_STATE_READY) && > + (tport->state != FDLS_TGT_STATE_ADISC)) { > + FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, > + "tport state: %d\n", tport->state); > + spin_unlock_irqrestore(&fnic->fnic_lock, flags); > + goto fnic_device_reset_end; > + } > + spin_unlock_irqrestore(&fnic->fnic_lock, flags); > Please check if returning FAST_IO_FAIL here wouldn't be a better option. Most of the time a device reset is triggered by a command timeout, which typically happens due to a transport issue (eg link is down or something). So returning 'FAILED' will just escalate to host reset, and that can take for a really long time trying to abort all commands. > /* Check if remote port up */ > if (fc_remote_port_chkready(rport)) { > - atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); > goto fnic_device_reset_end; > } > > @@ -2352,6 +2602,7 @@ int fnic_device_reset(struct scsi_cmnd *sc) > io_req->port_id = rport->port_id; > io_req->tag = mqtag; > fnic_priv(sc)->io_req = io_req; > + io_req->tport = tport; > io_req->sc = sc; > > if (fnic->sw_copy_wq[hwq].io_req_table[blk_mq_unique_tag_to_tag(mqtag)] != NULL) > @@ -2383,6 +2634,11 @@ int fnic_device_reset(struct scsi_cmnd *sc) > fnic_priv(sc)->flags |= FNIC_DEV_RST_ISSUED; > spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); > > + spin_lock_irqsave(&fnic->fnic_lock, flags); > + old_link_down_cnt = iport->fnic->link_down_cnt; > + old_soft_reset_count = fnic->soft_reset_count; > + spin_unlock_irqrestore(&fnic->fnic_lock, flags); > + > /* > * Wait on the local completion for LUN reset. The io_req may be > * freed while we wait since we hold no lock. > @@ -2390,6 +2646,24 @@ int fnic_device_reset(struct scsi_cmnd *sc) > wait_for_completion_timeout(&tm_done, > msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT)); > > + /* > + * Wake up can be due to the following reasons: > + * 1) The device reset completed from target. > + * 2) Device reset timed out. > + * 3) A link-down/host_reset may have happened in between. > + * 4) The device reset was aborted and io_req->dr_done was called. > + */ > + > + exit_dr = 0; > + spin_lock_irqsave(&fnic->fnic_lock, flags); > + if ((old_link_down_cnt != fnic->link_down_cnt) || > + (fnic->reset_in_progress) || > + (fnic->soft_reset_count != old_soft_reset_count) || > + (iport->state != FNIC_IPORT_STATE_READY)) > + exit_dr = 1; > + > + spin_unlock_irqrestore(&fnic->fnic_lock, flags); > + > spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); > io_req = fnic_priv(sc)->io_req; > if (!io_req) { > @@ -2398,6 +2672,13 @@ int fnic_device_reset(struct scsi_cmnd *sc) > "io_req is null mqtag 0x%x sc 0x%p\n", mqtag, sc); > goto fnic_device_reset_end; > } > + > + if (exit_dr) { > + FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, > + "Host reset called for fnic. Exit device reset\n"); > + io_req->dr_done = NULL; > + goto fnic_device_reset_clean; > + } > io_req->dr_done = NULL; > > status = fnic_priv(sc)->lr_status; > @@ -2411,50 +2692,8 @@ int fnic_device_reset(struct scsi_cmnd *sc) > FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, > "Device reset timed out\n"); > fnic_priv(sc)->flags |= FNIC_DEV_RST_TIMED_OUT; > - spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); > int_to_scsilun(sc->device->lun, &fc_lun); > - /* > - * Issue abort and terminate on device reset request. > - * If q'ing of terminate fails, retry it after a delay. > - */ > - while (1) { > - spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); > - if (fnic_priv(sc)->flags & FNIC_DEV_RST_TERM_ISSUED) { > - spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); > - break; > - } > - spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); > - if (fnic_queue_abort_io_req(fnic, > - mqtag | FNIC_TAG_DEV_RST, > - FCPIO_ITMF_ABT_TASK_TERM, > - fc_lun.scsi_lun, io_req, hwq)) { > - wait_for_completion_timeout(&tm_done, > - msecs_to_jiffies(FNIC_ABT_TERM_DELAY_TIMEOUT)); > - } else { > - spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); > - fnic_priv(sc)->flags |= FNIC_DEV_RST_TERM_ISSUED; > - fnic_priv(sc)->state = FNIC_IOREQ_ABTS_PENDING; > - io_req->abts_done = &tm_done; > - spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); > - FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, > - "Abort and terminate issued on Device reset mqtag 0x%x sc 0x%p\n", > - mqtag, sc); > - break; > - } > - } > - while (1) { > - spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); > - if (!(fnic_priv(sc)->flags & FNIC_DEV_RST_DONE)) { > - spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); > - wait_for_completion_timeout(&tm_done, > - msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT)); > - break; > - } else { > - io_req = fnic_priv(sc)->io_req; > - io_req->abts_done = NULL; > - goto fnic_device_reset_clean; > - } > - } > + goto fnic_device_reset_clean; > } else { > spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); > } > @@ -2480,8 +2719,7 @@ int fnic_device_reset(struct scsi_cmnd *sc) > spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); > io_req = fnic_priv(sc)->io_req; > FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, > - "Device reset failed" > - " since could not abort all IOs\n"); > + "Device reset failed: Cannot abort all IOs\n"); > goto fnic_device_reset_clean; > } > > @@ -2507,6 +2745,15 @@ int fnic_device_reset(struct scsi_cmnd *sc) > mempool_free(io_req, fnic->io_req_pool); > } > > + /* > + * If link-event is seen while LUN reset is issued we need > + * to complete the LUN reset here > + */ > + if (!new_sc) { > + sc->result = DID_RESET << 16; > + scsi_done(sc); > + } > + > fnic_device_reset_end: > FNIC_TRACE(fnic_device_reset, sc->device->host->host_no, rq->tag, sc, > jiffies_to_msecs(jiffies - start_time), > @@ -2520,6 +2767,17 @@ int fnic_device_reset(struct scsi_cmnd *sc) > mutex_unlock(&fnic->sgreset_mutex); > } > > + while ((ret == SUCCESS) && fnic_count_lun_ioreqs(fnic, sc->device)) { > + if (count >= 2) { > + ret = FAILED; > + break; > + } > + FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, > + "Cannot clean up all IOs for the LUN\n"); > + schedule_timeout(msecs_to_jiffies(1000)); > + count++; > + } > + > FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, > "Returning from device reset %s\n", > (ret == SUCCESS) ? > @@ -2531,50 +2789,54 @@ int fnic_device_reset(struct scsi_cmnd *sc) > return ret; > } > > -/* Clean up all IOs, clean up libFC local port */ > -int fnic_reset(struct Scsi_Host *shost) > +static void fnic_post_flogo_linkflap(struct fnic *fnic) > +{ > + unsigned long flags; > + > + fnic_fdls_link_status_change(fnic, 0); > + spin_lock_irqsave(&fnic->fnic_lock, flags); > + > + if (fnic->link_status) { > + spin_unlock_irqrestore(&fnic->fnic_lock, flags); > + fnic_fdls_link_status_change(fnic, 1); > + return; > + } > + spin_unlock_irqrestore(&fnic->fnic_lock, flags); > +} > + > +/* Logout from all the targets and simulate link flap */ > +void fnic_reset(struct Scsi_Host *shost) > { > - struct fc_lport *lp; > struct fnic *fnic; > - int ret = 0; > struct reset_stats *reset_stats; > > - lp = shost_priv(shost); > - fnic = lport_priv(lp); > + fnic = *((struct fnic **) shost_priv(shost)); > reset_stats = &fnic->fnic_stats.reset_stats; > > FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, > - "Issuing fnic reset\n"); > + "Issuing fnic reset\n"); > > atomic64_inc(&reset_stats->fnic_resets); > - > - /* > - * Reset local port, this will clean up libFC exchanges, > - * reset remote port sessions, and if link is up, begin flogi > - */ > - ret = fc_lport_reset(lp); > + fnic_post_flogo_linkflap(fnic); > > FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, > - "Returning from fnic reset with: %s\n", > - (ret == 0) ? "SUCCESS" : "FAILED"); > + "Returning from fnic reset"); > > - if (ret == 0) > - atomic64_inc(&reset_stats->fnic_reset_completions); > - else > - atomic64_inc(&reset_stats->fnic_reset_failures); > + atomic64_inc(&reset_stats->fnic_reset_completions); > +} > + > +int fnic_issue_fc_host_lip(struct Scsi_Host *shost) > +{ > + int ret = 0; > + struct fnic *fnic = *((struct fnic **) shost_priv(shost)); > + > + FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, > + "FC host lip issued"); > > + ret = fnic_host_reset(shost); > return ret; > } > > -/* > - * SCSI Error handling calls driver's eh_host_reset if all prior > - * error handling levels return FAILED. If host reset completes > - * successfully, and if link is up, then Fabric login begins. > - * > - * Host Reset is the highest level of error recovery. If this fails, then > - * host is offlined by SCSI. > - * > - */ > int fnic_host_reset(struct Scsi_Host *shost) > { > int ret = SUCCESS; > @@ -2637,122 +2899,6 @@ int fnic_host_reset(struct Scsi_Host *shost) > return ret; > } > > -/* > - * This fxn is called from libFC when host is removed > - */ > -void fnic_scsi_abort_io(struct fc_lport *lp) > -{ > - int err = 0; > - unsigned long flags; > - enum fnic_state old_state; > - struct fnic *fnic = lport_priv(lp); > - DECLARE_COMPLETION_ONSTACK(remove_wait); > - > - /* Issue firmware reset for fnic, wait for reset to complete */ > -retry_fw_reset: > - spin_lock_irqsave(&fnic->fnic_lock, flags); > - if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) && > - fnic->link_events) { > - /* fw reset is in progress, poll for its completion */ > - spin_unlock_irqrestore(&fnic->fnic_lock, flags); > - schedule_timeout(msecs_to_jiffies(100)); > - goto retry_fw_reset; > - } > - > - fnic->remove_wait = &remove_wait; > - old_state = fnic->state; > - fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; > - fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr); > - spin_unlock_irqrestore(&fnic->fnic_lock, flags); > - > - err = fnic_fw_reset_handler(fnic); > - if (err) { > - spin_lock_irqsave(&fnic->fnic_lock, flags); > - if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) > - fnic->state = old_state; > - fnic->remove_wait = NULL; > - spin_unlock_irqrestore(&fnic->fnic_lock, flags); > - return; > - } > - > - /* Wait for firmware reset to complete */ > - wait_for_completion_timeout(&remove_wait, > - msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT)); > - > - spin_lock_irqsave(&fnic->fnic_lock, flags); > - fnic->remove_wait = NULL; > - FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, > - "fnic_scsi_abort_io %s\n", > - (fnic->state == FNIC_IN_ETH_MODE) ? > - "SUCCESS" : "FAILED"); > - spin_unlock_irqrestore(&fnic->fnic_lock, flags); > - > -} > - > -/* > - * This fxn called from libFC to clean up driver IO state on link down > - */ > -void fnic_scsi_cleanup(struct fc_lport *lp) > -{ > - unsigned long flags; > - enum fnic_state old_state; > - struct fnic *fnic = lport_priv(lp); > - > - /* issue fw reset */ > -retry_fw_reset: > - spin_lock_irqsave(&fnic->fnic_lock, flags); > - if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) { > - /* fw reset is in progress, poll for its completion */ > - spin_unlock_irqrestore(&fnic->fnic_lock, flags); > - schedule_timeout(msecs_to_jiffies(100)); > - goto retry_fw_reset; > - } > - old_state = fnic->state; > - fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; > - fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr); > - spin_unlock_irqrestore(&fnic->fnic_lock, flags); > - > - if (fnic_fw_reset_handler(fnic)) { > - spin_lock_irqsave(&fnic->fnic_lock, flags); > - if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) > - fnic->state = old_state; > - spin_unlock_irqrestore(&fnic->fnic_lock, flags); > - } > - > -} > - > -void fnic_empty_scsi_cleanup(struct fc_lport *lp) > -{ > -} > - > -void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did) > -{ > - struct fnic *fnic = lport_priv(lp); > - > - /* Non-zero sid, nothing to do */ > - if (sid) > - goto call_fc_exch_mgr_reset; > - > - if (did) { > - fnic_rport_exch_reset(fnic, did); > - goto call_fc_exch_mgr_reset; > - } > - > - /* > - * sid = 0, did = 0 > - * link down or device being removed > - */ > - if (!fnic->in_remove) > - fnic_scsi_cleanup(lp); > - else > - fnic_scsi_abort_io(lp); > - > - /* call libFC exch mgr reset to reset its exchanges */ > -call_fc_exch_mgr_reset: > - fc_exch_mgr_reset(lp, sid, did); > - > -} > - > static bool fnic_abts_pending_iter(struct scsi_cmnd *sc, void *data) > { > struct request *const rq = scsi_cmd_to_rq(sc); > diff --git a/drivers/scsi/fnic/fnic_stats.h b/drivers/scsi/fnic/fnic_stats.h > index 9d7f98c452dd..1f1a1ec90a23 100644 > --- a/drivers/scsi/fnic/fnic_stats.h > +++ b/drivers/scsi/fnic/fnic_stats.h > @@ -127,6 +127,4 @@ struct stats_debug_info { > }; > > int fnic_get_stats_data(struct stats_debug_info *, struct fnic_stats *); > -void fnic_stats_debugfs_init(struct fnic *); > -void fnic_stats_debugfs_remove(struct fnic *); > #endif /* _FNIC_STATS_H_ */ Cheers, Hannes -- Dr. Hannes Reinecke Kernel Storage Architect hare@suse.de +49 911 74053 688 SUSE Software Solutions GmbH, Frankenstr. 146, 90461 Nürnberg HRB 36809 (AG Nürnberg), GF: I. Totev, A. McDonald, W. Knoblich