diff options
Diffstat (limited to 'drivers/scsi/libsas/sas_discover.c')
| -rw-r--r-- | drivers/scsi/libsas/sas_discover.c | 108 |
1 files changed, 58 insertions, 50 deletions
diff --git a/drivers/scsi/libsas/sas_discover.c b/drivers/scsi/libsas/sas_discover.c index 726ada9b8c79..b07062db50b2 100644 --- a/drivers/scsi/libsas/sas_discover.c +++ b/drivers/scsi/libsas/sas_discover.c @@ -1,30 +1,13 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Serial Attached SCSI (SAS) Discover process * * Copyright (C) 2005 Adaptec, Inc. All rights reserved. * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com> - * - * This file is licensed under GPLv2. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of the - * License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - * */ #include <linux/scatterlist.h> #include <linux/slab.h> -#include <linux/async.h> #include <scsi/scsi_host.h> #include <scsi/scsi_eh.h> #include "sas_internal.h" @@ -32,7 +15,7 @@ #include <scsi/scsi_transport.h> #include <scsi/scsi_transport_sas.h> #include <scsi/sas_ata.h> -#include "../scsi_sas_internal.h" +#include "scsi_sas_internal.h" /* ---------- Basic task processing for discovery purposes ---------- */ @@ -91,18 +74,27 @@ static int sas_get_port_device(struct asd_sas_port *port) struct dev_to_host_fis *fis = (struct dev_to_host_fis *) dev->frame_rcvd; if (fis->interrupt_reason == 1 && fis->lbal == 1 && - fis->byte_count_low==0x69 && fis->byte_count_high == 0x96 + fis->byte_count_low == 0x69 && fis->byte_count_high == 0x96 && (fis->device & ~0x10) == 0) dev->dev_type = SAS_SATA_PM; else dev->dev_type = SAS_SATA_DEV; dev->tproto = SAS_PROTOCOL_SATA; - } else { + } else if (port->oob_mode == SAS_OOB_MODE) { struct sas_identify_frame *id = (struct sas_identify_frame *) dev->frame_rcvd; dev->dev_type = id->dev_type; dev->iproto = id->initiator_bits; dev->tproto = id->target_bits; + } else { + /* If the oob mode is OOB_NOT_CONNECTED, the port is + * disconnected due to race with PHY down. We cannot + * continue to discover this port + */ + sas_put_device(dev); + pr_warn("Port %016llx is disconnected when discovering\n", + SAS_ADDR(port->attached_sas_addr)); + return -ENODEV; } sas_init_dev(dev); @@ -115,7 +107,7 @@ static int sas_get_port_device(struct asd_sas_port *port) rphy = NULL; break; } - /* fall through */ + fallthrough; case SAS_END_DEVICE: rphy = sas_end_device_alloc(port->port); break; @@ -178,7 +170,7 @@ int sas_notify_lldd_dev_found(struct domain_device *dev) { int res = 0; struct sas_ha_struct *sas_ha = dev->port->ha; - struct Scsi_Host *shost = sas_ha->core.shost; + struct Scsi_Host *shost = sas_ha->shost; struct sas_internal *i = to_sas_internal(shost->transportt); if (!i->dft->lldd_dev_found) @@ -186,20 +178,21 @@ int sas_notify_lldd_dev_found(struct domain_device *dev) res = i->dft->lldd_dev_found(dev); if (res) { - pr_warn("driver on host %s cannot handle device %llx, error:%d\n", + pr_warn("driver on host %s cannot handle device %016llx, error:%d\n", dev_name(sas_ha->dev), SAS_ADDR(dev->sas_addr), res); + return res; } set_bit(SAS_DEV_FOUND, &dev->state); kref_get(&dev->kref); - return res; + return 0; } void sas_notify_lldd_dev_gone(struct domain_device *dev) { struct sas_ha_struct *sas_ha = dev->port->ha; - struct Scsi_Host *shost = sas_ha->core.shost; + struct Scsi_Host *shost = sas_ha->shost; struct sas_internal *i = to_sas_internal(shost->transportt); if (!i->dft->lldd_dev_gone) @@ -241,7 +234,7 @@ static void sas_suspend_devices(struct work_struct *work) struct domain_device *dev; struct sas_discovery_event *ev = to_sas_discovery_event(work); struct asd_sas_port *port = ev->port; - struct Scsi_Host *shost = port->ha->core.shost; + struct Scsi_Host *shost = port->ha->shost; struct sas_internal *si = to_sas_internal(shost->transportt); clear_bit(DISCE_SUSPEND, &port->disc.pending); @@ -282,15 +275,9 @@ static void sas_resume_devices(struct work_struct *work) * * See comment in sas_discover_sata(). */ -int sas_discover_end_dev(struct domain_device *dev) +static int sas_discover_end_dev(struct domain_device *dev) { - int res; - - res = sas_notify_lldd_dev_found(dev); - if (res) - return res; - - return 0; + return sas_notify_lldd_dev_found(dev); } /* ---------- Device registration and unregistration ---------- */ @@ -309,12 +296,12 @@ void sas_free_device(struct kref *kref) dev->phy = NULL; /* remove the phys and ports, everything else should be gone */ - if (dev->dev_type == SAS_EDGE_EXPANDER_DEVICE || dev->dev_type == SAS_FANOUT_EXPANDER_DEVICE) + if (dev_is_expander(dev->dev_type)) kfree(dev->ex_dev.ex_phy); if (dev_is_sata(dev) && dev->sata_dev.ap) { - ata_sas_tport_delete(dev->sata_dev.ap); - ata_sas_port_destroy(dev->sata_dev.ap); + ata_tport_delete(dev->sata_dev.ap); + ata_port_free(dev->sata_dev.ap); ata_host_put(dev->sata_dev.ata_host); dev->sata_dev.ata_host = NULL; dev->sata_dev.ap = NULL; @@ -373,6 +360,33 @@ static void sas_destruct_ports(struct asd_sas_port *port) } } +static bool sas_abort_cmd(struct request *req, void *data) +{ + struct scsi_cmnd *cmd = blk_mq_rq_to_pdu(req); + struct domain_device *dev = data; + + if (dev == cmd_to_domain_dev(cmd)) + blk_abort_request(req); + return true; +} + +static void sas_abort_device_scsi_cmds(struct domain_device *dev) +{ + struct sas_ha_struct *sas_ha = dev->port->ha; + struct Scsi_Host *shost = sas_ha->shost; + + if (dev_is_expander(dev->dev_type)) + return; + + /* + * For removed device with active IOs, the user space applications have + * to spend very long time waiting for the timeout. This is not + * necessary because a removed device will not return the IOs. + * Abort the inflight IOs here so that EH can be quickly kicked in. + */ + blk_mq_tagset_busy_iter(&shost->tag_set, sas_abort_cmd, dev); +} + void sas_unregister_dev(struct asd_sas_port *port, struct domain_device *dev) { if (!test_bit(SAS_DEV_DESTROY, &dev->state) && @@ -385,12 +399,14 @@ void sas_unregister_dev(struct asd_sas_port *port, struct domain_device *dev) } if (!test_and_set_bit(SAS_DEV_DESTROY, &dev->state)) { + if (test_bit(SAS_DEV_GONE, &dev->state)) + sas_abort_device_scsi_cmds(dev); sas_rphy_unlink(dev->rphy); list_move_tail(&dev->disco_list_node, &port->destroy_list); } } -void sas_unregister_domain_devices(struct asd_sas_port *port, int gone) +void sas_unregister_domain_devices(struct asd_sas_port *port, bool gone) { struct domain_device *dev, *n; @@ -468,13 +484,8 @@ static void sas_discover_domain(struct work_struct *work) break; case SAS_SATA_DEV: case SAS_SATA_PM: -#ifdef CONFIG_SCSI_SAS_ATA error = sas_discover_sata(dev); break; -#else - pr_notice("ATA device seen but CONFIG_SCSI_SAS_ATA=N so cannot attach\n"); - /* Fall through */ -#endif default: error = -ENXIO; pr_err("unhandled device %d\n", dev->dev_type); @@ -519,8 +530,7 @@ static void sas_revalidate_domain(struct work_struct *work) pr_debug("REVALIDATING DOMAIN on port %d, pid:%d\n", port->id, task_pid_nr(current)); - if (ddev && (ddev->dev_type == SAS_FANOUT_EXPANDER_DEVICE || - ddev->dev_type == SAS_EDGE_EXPANDER_DEVICE)) + if (ddev && dev_is_expander(ddev->dev_type)) res = sas_ex_revalidate_domain(ddev); pr_debug("done REVALIDATING DOMAIN on port %d, pid:%d, res 0x%x\n", @@ -558,19 +568,17 @@ static void sas_chain_event(int event, unsigned long *pending, } } -int sas_discover_event(struct asd_sas_port *port, enum discover_event ev) +void sas_discover_event(struct asd_sas_port *port, enum discover_event ev) { struct sas_discovery *disc; if (!port) - return 0; + return; disc = &port->disc; BUG_ON(ev >= DISC_NUM_EVENTS); sas_chain_event(ev, &disc->pending, &disc->disc_work[ev].work, port->ha); - - return 0; } /** |