2006-08-29 22:22:51 +08:00
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/*
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* Serial Attached SCSI (SAS) Discover process
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*
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* Copyright (C) 2005 Adaptec, Inc. All rights reserved.
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* Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
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*
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* This file is licensed under GPLv2.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#include <linux/scatterlist.h>
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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 16:04:11 +08:00
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#include <linux/slab.h>
|
2012-06-22 14:41:51 +08:00
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#include <linux/async.h>
|
2006-08-29 22:22:51 +08:00
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#include <scsi/scsi_host.h>
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#include <scsi/scsi_eh.h>
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#include "sas_internal.h"
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#include <scsi/scsi_transport.h>
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#include <scsi/scsi_transport_sas.h>
|
2011-11-18 09:59:48 +08:00
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#include <scsi/sas_ata.h>
|
2006-08-29 22:22:51 +08:00
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#include "../scsi_sas_internal.h"
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/* ---------- Basic task processing for discovery purposes ---------- */
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void sas_init_dev(struct domain_device *dev)
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{
|
2011-11-16 17:44:13 +08:00
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switch (dev->dev_type) {
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case SAS_END_DEV:
|
2012-06-22 14:30:48 +08:00
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INIT_LIST_HEAD(&dev->ssp_dev.eh_list_node);
|
2011-11-16 17:44:13 +08:00
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break;
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case EDGE_DEV:
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case FANOUT_DEV:
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INIT_LIST_HEAD(&dev->ex_dev.children);
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mutex_init(&dev->ex_dev.cmd_mutex);
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break;
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default:
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break;
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}
|
2006-08-29 22:22:51 +08:00
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}
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/* ---------- Domain device discovery ---------- */
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/**
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* sas_get_port_device -- Discover devices which caused port creation
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* @port: pointer to struct sas_port of interest
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*
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* Devices directly attached to a HA port, have no parent. This is
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* how we know they are (domain) "root" devices. All other devices
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* do, and should have their "parent" pointer set appropriately as
|
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* soon as a child device is discovered.
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|
*/
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static int sas_get_port_device(struct asd_sas_port *port)
|
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|
{
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struct asd_sas_phy *phy;
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struct sas_rphy *rphy;
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struct domain_device *dev;
|
2012-03-22 12:09:07 +08:00
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int rc = -ENODEV;
|
2006-08-29 22:22:51 +08:00
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|
2011-11-18 09:59:47 +08:00
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dev = sas_alloc_device();
|
2006-08-29 22:22:51 +08:00
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if (!dev)
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return -ENOMEM;
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|
2012-01-29 09:24:40 +08:00
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spin_lock_irq(&port->phy_list_lock);
|
2006-08-29 22:22:51 +08:00
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if (list_empty(&port->phy_list)) {
|
2012-01-29 09:24:40 +08:00
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spin_unlock_irq(&port->phy_list_lock);
|
2011-11-18 09:59:47 +08:00
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sas_put_device(dev);
|
2006-08-29 22:22:51 +08:00
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return -ENODEV;
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}
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phy = container_of(port->phy_list.next, struct asd_sas_phy, port_phy_el);
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spin_lock(&phy->frame_rcvd_lock);
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memcpy(dev->frame_rcvd, phy->frame_rcvd, min(sizeof(dev->frame_rcvd),
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(size_t)phy->frame_rcvd_size));
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spin_unlock(&phy->frame_rcvd_lock);
|
2012-01-29 09:24:40 +08:00
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spin_unlock_irq(&port->phy_list_lock);
|
2006-08-29 22:22:51 +08:00
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if (dev->frame_rcvd[0] == 0x34 && port->oob_mode == SATA_OOB_MODE) {
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struct dev_to_host_fis *fis =
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(struct dev_to_host_fis *) dev->frame_rcvd;
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if (fis->interrupt_reason == 1 && fis->lbal == 1 &&
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fis->byte_count_low==0x69 && fis->byte_count_high == 0x96
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&& (fis->device & ~0x10) == 0)
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dev->dev_type = SATA_PM;
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else
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dev->dev_type = SATA_DEV;
|
2007-11-06 03:51:17 +08:00
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dev->tproto = SAS_PROTOCOL_SATA;
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2006-08-29 22:22:51 +08:00
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} else {
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struct sas_identify_frame *id =
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(struct sas_identify_frame *) dev->frame_rcvd;
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dev->dev_type = id->dev_type;
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dev->iproto = id->initiator_bits;
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dev->tproto = id->target_bits;
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}
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sas_init_dev(dev);
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|
2012-03-22 12:09:07 +08:00
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dev->port = port;
|
2006-08-29 22:22:51 +08:00
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switch (dev->dev_type) {
|
2006-08-11 10:19:47 +08:00
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case SATA_DEV:
|
2012-03-22 12:09:07 +08:00
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rc = sas_ata_init(dev);
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if (rc) {
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rphy = NULL;
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break;
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}
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/* fall through */
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case SAS_END_DEV:
|
2006-08-29 22:22:51 +08:00
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rphy = sas_end_device_alloc(port->port);
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|
break;
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case EDGE_DEV:
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rphy = sas_expander_alloc(port->port,
|
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|
|
SAS_EDGE_EXPANDER_DEVICE);
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|
break;
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|
case FANOUT_DEV:
|
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|
rphy = sas_expander_alloc(port->port,
|
|
|
|
SAS_FANOUT_EXPANDER_DEVICE);
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|
break;
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|
default:
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|
|
printk("ERROR: Unidentified device type %d\n", dev->dev_type);
|
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|
|
rphy = NULL;
|
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|
|
break;
|
|
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|
}
|
|
|
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|
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|
|
if (!rphy) {
|
2011-11-18 09:59:47 +08:00
|
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|
sas_put_device(dev);
|
2012-03-22 12:09:07 +08:00
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|
return rc;
|
2006-08-29 22:22:51 +08:00
|
|
|
}
|
2012-01-29 09:24:40 +08:00
|
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|
2006-08-29 22:22:51 +08:00
|
|
|
rphy->identify.phy_identifier = phy->phy->identify.phy_identifier;
|
|
|
|
memcpy(dev->sas_addr, port->attached_sas_addr, SAS_ADDR_SIZE);
|
|
|
|
sas_fill_in_rphy(dev, rphy);
|
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|
|
sas_hash_addr(dev->hashed_sas_addr, dev->sas_addr);
|
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|
|
port->port_dev = dev;
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|
|
dev->linkrate = port->linkrate;
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|
|
dev->min_linkrate = port->linkrate;
|
|
|
|
dev->max_linkrate = port->linkrate;
|
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|
|
dev->pathways = port->num_phys;
|
|
|
|
memset(port->disc.fanout_sas_addr, 0, SAS_ADDR_SIZE);
|
|
|
|
memset(port->disc.eeds_a, 0, SAS_ADDR_SIZE);
|
|
|
|
memset(port->disc.eeds_b, 0, SAS_ADDR_SIZE);
|
|
|
|
port->disc.max_level = 0;
|
2011-12-22 13:33:17 +08:00
|
|
|
sas_device_set_phy(dev, port->port);
|
2006-08-29 22:22:51 +08:00
|
|
|
|
|
|
|
dev->rphy = rphy;
|
2012-03-21 01:53:24 +08:00
|
|
|
get_device(&dev->rphy->dev);
|
2011-11-18 09:59:51 +08:00
|
|
|
|
2012-01-19 12:14:01 +08:00
|
|
|
if (dev_is_sata(dev) || dev->dev_type == SAS_END_DEV)
|
2011-11-18 09:59:51 +08:00
|
|
|
list_add_tail(&dev->disco_list_node, &port->disco_list);
|
|
|
|
else {
|
|
|
|
spin_lock_irq(&port->dev_list_lock);
|
|
|
|
list_add_tail(&dev->dev_list_node, &port->dev_list);
|
|
|
|
spin_unlock_irq(&port->dev_list_lock);
|
|
|
|
}
|
2006-08-29 22:22:51 +08:00
|
|
|
|
2012-03-13 02:38:26 +08:00
|
|
|
spin_lock_irq(&port->phy_list_lock);
|
|
|
|
list_for_each_entry(phy, &port->phy_list, port_phy_el)
|
|
|
|
sas_phy_set_target(phy, dev);
|
|
|
|
spin_unlock_irq(&port->phy_list_lock);
|
|
|
|
|
2006-08-29 22:22:51 +08:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* ---------- Discover and Revalidate ---------- */
|
|
|
|
|
|
|
|
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 sas_internal *i = to_sas_internal(shost->transportt);
|
|
|
|
|
2012-06-22 14:41:51 +08:00
|
|
|
if (!i->dft->lldd_dev_found)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
res = i->dft->lldd_dev_found(dev);
|
|
|
|
if (res) {
|
|
|
|
printk("sas: driver on pcidev %s cannot handle "
|
|
|
|
"device %llx, error:%d\n",
|
|
|
|
dev_name(sas_ha->dev),
|
|
|
|
SAS_ADDR(dev->sas_addr), res);
|
2006-08-29 22:22:51 +08:00
|
|
|
}
|
2012-06-22 14:41:51 +08:00
|
|
|
set_bit(SAS_DEV_FOUND, &dev->state);
|
|
|
|
kref_get(&dev->kref);
|
2006-08-29 22:22:51 +08:00
|
|
|
return res;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
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 sas_internal *i = to_sas_internal(shost->transportt);
|
|
|
|
|
2012-06-22 14:41:51 +08:00
|
|
|
if (!i->dft->lldd_dev_gone)
|
|
|
|
return;
|
|
|
|
|
|
|
|
if (test_and_clear_bit(SAS_DEV_FOUND, &dev->state)) {
|
2006-08-29 22:22:51 +08:00
|
|
|
i->dft->lldd_dev_gone(dev);
|
2011-11-18 09:59:47 +08:00
|
|
|
sas_put_device(dev);
|
|
|
|
}
|
2006-08-29 22:22:51 +08:00
|
|
|
}
|
|
|
|
|
2012-01-19 12:14:01 +08:00
|
|
|
static void sas_probe_devices(struct work_struct *work)
|
|
|
|
{
|
|
|
|
struct domain_device *dev, *n;
|
2012-03-10 03:00:06 +08:00
|
|
|
struct sas_discovery_event *ev = to_sas_discovery_event(work);
|
2012-01-19 12:14:01 +08:00
|
|
|
struct asd_sas_port *port = ev->port;
|
2006-08-29 22:22:51 +08:00
|
|
|
|
2012-01-19 12:14:01 +08:00
|
|
|
clear_bit(DISCE_PROBE, &port->disc.pending);
|
|
|
|
|
2012-01-19 12:47:01 +08:00
|
|
|
/* devices must be domain members before link recovery and probe */
|
|
|
|
list_for_each_entry(dev, &port->disco_list, disco_list_node) {
|
2012-01-19 12:14:01 +08:00
|
|
|
spin_lock_irq(&port->dev_list_lock);
|
|
|
|
list_add_tail(&dev->dev_list_node, &port->dev_list);
|
|
|
|
spin_unlock_irq(&port->dev_list_lock);
|
2012-01-19 12:47:01 +08:00
|
|
|
}
|
2012-01-19 12:14:01 +08:00
|
|
|
|
2012-01-19 12:47:01 +08:00
|
|
|
sas_probe_sata(port);
|
2012-01-19 12:14:01 +08:00
|
|
|
|
2012-01-19 12:47:01 +08:00
|
|
|
list_for_each_entry_safe(dev, n, &port->disco_list, disco_list_node) {
|
|
|
|
int err;
|
|
|
|
|
|
|
|
err = sas_rphy_add(dev->rphy);
|
|
|
|
if (err)
|
|
|
|
sas_fail_probe(dev, __func__, err);
|
|
|
|
else
|
2012-01-19 12:14:01 +08:00
|
|
|
list_del_init(&dev->disco_list_node);
|
|
|
|
}
|
|
|
|
}
|
2006-08-29 22:22:51 +08:00
|
|
|
|
2012-06-22 14:41:51 +08:00
|
|
|
static void sas_suspend_devices(struct work_struct *work)
|
|
|
|
{
|
|
|
|
struct asd_sas_phy *phy;
|
|
|
|
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 sas_internal *si = to_sas_internal(shost->transportt);
|
|
|
|
|
|
|
|
clear_bit(DISCE_SUSPEND, &port->disc.pending);
|
|
|
|
|
|
|
|
sas_suspend_sata(port);
|
|
|
|
|
|
|
|
/* lldd is free to forget the domain_device across the
|
|
|
|
* suspension, we force the issue here to keep the reference
|
|
|
|
* counts aligned
|
|
|
|
*/
|
|
|
|
list_for_each_entry(dev, &port->dev_list, dev_list_node)
|
|
|
|
sas_notify_lldd_dev_gone(dev);
|
|
|
|
|
|
|
|
/* we are suspending, so we know events are disabled and
|
|
|
|
* phy_list is not being mutated
|
|
|
|
*/
|
|
|
|
list_for_each_entry(phy, &port->phy_list, port_phy_el) {
|
|
|
|
if (si->dft->lldd_port_formed)
|
|
|
|
si->dft->lldd_port_deformed(phy);
|
|
|
|
phy->suspended = 1;
|
|
|
|
port->suspended = 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void sas_resume_devices(struct work_struct *work)
|
|
|
|
{
|
|
|
|
struct sas_discovery_event *ev = to_sas_discovery_event(work);
|
|
|
|
struct asd_sas_port *port = ev->port;
|
|
|
|
|
|
|
|
clear_bit(DISCE_RESUME, &port->disc.pending);
|
|
|
|
|
|
|
|
sas_resume_sata(port);
|
|
|
|
}
|
|
|
|
|
2006-08-29 22:22:51 +08:00
|
|
|
/**
|
|
|
|
* sas_discover_end_dev -- discover an end device (SSP, etc)
|
|
|
|
* @end: pointer to domain device of interest
|
|
|
|
*
|
|
|
|
* See comment in sas_discover_sata().
|
|
|
|
*/
|
|
|
|
int sas_discover_end_dev(struct domain_device *dev)
|
|
|
|
{
|
|
|
|
int res;
|
|
|
|
|
|
|
|
res = sas_notify_lldd_dev_found(dev);
|
|
|
|
if (res)
|
2012-01-19 12:14:01 +08:00
|
|
|
return res;
|
|
|
|
sas_discover_event(dev->port, DISCE_PROBE);
|
2006-08-29 22:22:51 +08:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* ---------- Device registration and unregistration ---------- */
|
|
|
|
|
2011-11-18 09:59:47 +08:00
|
|
|
void sas_free_device(struct kref *kref)
|
|
|
|
{
|
|
|
|
struct domain_device *dev = container_of(kref, typeof(*dev), kref);
|
|
|
|
|
2012-03-21 01:53:24 +08:00
|
|
|
put_device(&dev->rphy->dev);
|
|
|
|
dev->rphy = NULL;
|
|
|
|
|
2011-11-18 09:59:47 +08:00
|
|
|
if (dev->parent)
|
|
|
|
sas_put_device(dev->parent);
|
|
|
|
|
2011-12-22 13:33:17 +08:00
|
|
|
sas_port_put_phy(dev->phy);
|
|
|
|
dev->phy = NULL;
|
|
|
|
|
2011-11-18 09:59:47 +08:00
|
|
|
/* remove the phys and ports, everything else should be gone */
|
|
|
|
if (dev->dev_type == EDGE_DEV || dev->dev_type == FANOUT_DEV)
|
|
|
|
kfree(dev->ex_dev.ex_phy);
|
|
|
|
|
2012-01-11 07:14:09 +08:00
|
|
|
if (dev_is_sata(dev) && dev->sata_dev.ap) {
|
|
|
|
ata_sas_port_destroy(dev->sata_dev.ap);
|
|
|
|
dev->sata_dev.ap = NULL;
|
|
|
|
}
|
|
|
|
|
2011-11-18 09:59:47 +08:00
|
|
|
kfree(dev);
|
|
|
|
}
|
|
|
|
|
2011-09-22 13:05:34 +08:00
|
|
|
static void sas_unregister_common_dev(struct asd_sas_port *port, struct domain_device *dev)
|
2006-08-29 22:22:51 +08:00
|
|
|
{
|
2012-06-22 14:30:48 +08:00
|
|
|
struct sas_ha_struct *ha = port->ha;
|
|
|
|
|
2006-08-29 22:22:51 +08:00
|
|
|
sas_notify_lldd_dev_gone(dev);
|
|
|
|
if (!dev->parent)
|
|
|
|
dev->port->port_dev = NULL;
|
|
|
|
else
|
|
|
|
list_del_init(&dev->siblings);
|
2011-09-22 13:05:34 +08:00
|
|
|
|
|
|
|
spin_lock_irq(&port->dev_list_lock);
|
2006-08-29 22:22:51 +08:00
|
|
|
list_del_init(&dev->dev_list_node);
|
2012-06-22 14:25:27 +08:00
|
|
|
if (dev_is_sata(dev))
|
|
|
|
sas_ata_end_eh(dev->sata_dev.ap);
|
2011-09-22 13:05:34 +08:00
|
|
|
spin_unlock_irq(&port->dev_list_lock);
|
2011-11-18 09:59:47 +08:00
|
|
|
|
2012-06-22 14:30:48 +08:00
|
|
|
spin_lock_irq(&ha->lock);
|
|
|
|
if (dev->dev_type == SAS_END_DEV &&
|
|
|
|
!list_empty(&dev->ssp_dev.eh_list_node)) {
|
|
|
|
list_del_init(&dev->ssp_dev.eh_list_node);
|
|
|
|
ha->eh_active--;
|
|
|
|
}
|
|
|
|
spin_unlock_irq(&ha->lock);
|
|
|
|
|
2011-11-18 09:59:47 +08:00
|
|
|
sas_put_device(dev);
|
2006-08-29 22:22:51 +08:00
|
|
|
}
|
|
|
|
|
2011-11-18 09:59:51 +08:00
|
|
|
static void sas_destruct_devices(struct work_struct *work)
|
2006-08-29 22:22:51 +08:00
|
|
|
{
|
2011-11-18 09:59:51 +08:00
|
|
|
struct domain_device *dev, *n;
|
2012-03-10 03:00:06 +08:00
|
|
|
struct sas_discovery_event *ev = to_sas_discovery_event(work);
|
2011-11-18 09:59:51 +08:00
|
|
|
struct asd_sas_port *port = ev->port;
|
|
|
|
|
|
|
|
clear_bit(DISCE_DESTRUCT, &port->disc.pending);
|
|
|
|
|
|
|
|
list_for_each_entry_safe(dev, n, &port->destroy_list, disco_list_node) {
|
|
|
|
list_del_init(&dev->disco_list_node);
|
|
|
|
|
2006-08-29 22:22:51 +08:00
|
|
|
sas_remove_children(&dev->rphy->dev);
|
|
|
|
sas_rphy_delete(dev->rphy);
|
2011-11-18 09:59:51 +08:00
|
|
|
sas_unregister_common_dev(port, dev);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void sas_unregister_dev(struct asd_sas_port *port, struct domain_device *dev)
|
|
|
|
{
|
|
|
|
if (!test_bit(SAS_DEV_DESTROY, &dev->state) &&
|
|
|
|
!list_empty(&dev->disco_list_node)) {
|
|
|
|
/* this rphy never saw sas_rphy_add */
|
|
|
|
list_del_init(&dev->disco_list_node);
|
|
|
|
sas_rphy_free(dev->rphy);
|
|
|
|
sas_unregister_common_dev(port, dev);
|
2012-03-21 01:53:24 +08:00
|
|
|
return;
|
2011-11-18 09:59:51 +08:00
|
|
|
}
|
|
|
|
|
2012-03-21 01:53:24 +08:00
|
|
|
if (!test_and_set_bit(SAS_DEV_DESTROY, &dev->state)) {
|
2011-11-18 09:59:51 +08:00
|
|
|
sas_rphy_unlink(dev->rphy);
|
|
|
|
list_move_tail(&dev->disco_list_node, &port->destroy_list);
|
|
|
|
sas_discover_event(dev->port, DISCE_DESTRUCT);
|
2006-08-29 22:22:51 +08:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2012-01-11 06:39:13 +08:00
|
|
|
void sas_unregister_domain_devices(struct asd_sas_port *port, int gone)
|
2006-08-29 22:22:51 +08:00
|
|
|
{
|
|
|
|
struct domain_device *dev, *n;
|
|
|
|
|
2012-01-11 06:39:13 +08:00
|
|
|
list_for_each_entry_safe_reverse(dev, n, &port->dev_list, dev_list_node) {
|
|
|
|
if (gone)
|
|
|
|
set_bit(SAS_DEV_GONE, &dev->state);
|
2011-09-22 13:05:34 +08:00
|
|
|
sas_unregister_dev(port, dev);
|
2012-01-11 06:39:13 +08:00
|
|
|
}
|
|
|
|
|
2011-11-18 09:59:51 +08:00
|
|
|
list_for_each_entry_safe(dev, n, &port->disco_list, disco_list_node)
|
|
|
|
sas_unregister_dev(port, dev);
|
2006-08-29 22:22:51 +08:00
|
|
|
|
|
|
|
port->port->rphy = NULL;
|
|
|
|
|
|
|
|
}
|
|
|
|
|
2011-12-22 13:33:17 +08:00
|
|
|
void sas_device_set_phy(struct domain_device *dev, struct sas_port *port)
|
|
|
|
{
|
|
|
|
struct sas_ha_struct *ha;
|
|
|
|
struct sas_phy *new_phy;
|
|
|
|
|
|
|
|
if (!dev)
|
|
|
|
return;
|
|
|
|
|
|
|
|
ha = dev->port->ha;
|
|
|
|
new_phy = sas_port_get_phy(port);
|
|
|
|
|
|
|
|
/* pin and record last seen phy */
|
|
|
|
spin_lock_irq(&ha->phy_port_lock);
|
|
|
|
if (new_phy) {
|
|
|
|
sas_port_put_phy(dev->phy);
|
|
|
|
dev->phy = new_phy;
|
|
|
|
}
|
|
|
|
spin_unlock_irq(&ha->phy_port_lock);
|
|
|
|
}
|
|
|
|
|
2006-08-29 22:22:51 +08:00
|
|
|
/* ---------- Discovery and Revalidation ---------- */
|
|
|
|
|
|
|
|
/**
|
|
|
|
* sas_discover_domain -- discover the domain
|
|
|
|
* @port: port to the domain of interest
|
|
|
|
*
|
|
|
|
* NOTE: this process _must_ quit (return) as soon as any connection
|
|
|
|
* errors are encountered. Connection recovery is done elsewhere.
|
|
|
|
* Discover process only interrogates devices in order to discover the
|
|
|
|
* domain.
|
|
|
|
*/
|
2006-11-22 22:57:56 +08:00
|
|
|
static void sas_discover_domain(struct work_struct *work)
|
2006-08-29 22:22:51 +08:00
|
|
|
{
|
2007-01-27 06:08:43 +08:00
|
|
|
struct domain_device *dev;
|
2006-08-29 22:22:51 +08:00
|
|
|
int error = 0;
|
2012-03-10 03:00:06 +08:00
|
|
|
struct sas_discovery_event *ev = to_sas_discovery_event(work);
|
2006-11-22 22:57:56 +08:00
|
|
|
struct asd_sas_port *port = ev->port;
|
2006-08-29 22:22:51 +08:00
|
|
|
|
2011-11-18 09:59:49 +08:00
|
|
|
clear_bit(DISCE_DISCOVER_DOMAIN, &port->disc.pending);
|
2006-08-29 22:22:51 +08:00
|
|
|
|
|
|
|
if (port->port_dev)
|
2007-01-27 06:08:43 +08:00
|
|
|
return;
|
|
|
|
|
|
|
|
error = sas_get_port_device(port);
|
|
|
|
if (error)
|
|
|
|
return;
|
|
|
|
dev = port->port_dev;
|
2006-08-29 22:22:51 +08:00
|
|
|
|
|
|
|
SAS_DPRINTK("DOING DISCOVERY on port %d, pid:%d\n", port->id,
|
2007-10-19 14:40:40 +08:00
|
|
|
task_pid_nr(current));
|
2006-08-29 22:22:51 +08:00
|
|
|
|
2007-01-27 06:08:43 +08:00
|
|
|
switch (dev->dev_type) {
|
2006-08-29 22:22:51 +08:00
|
|
|
case SAS_END_DEV:
|
2007-01-27 06:08:43 +08:00
|
|
|
error = sas_discover_end_dev(dev);
|
2006-08-29 22:22:51 +08:00
|
|
|
break;
|
|
|
|
case EDGE_DEV:
|
|
|
|
case FANOUT_DEV:
|
2007-01-27 06:08:43 +08:00
|
|
|
error = sas_discover_root_expander(dev);
|
2006-08-29 22:22:51 +08:00
|
|
|
break;
|
|
|
|
case SATA_DEV:
|
|
|
|
case SATA_PM:
|
2008-03-27 00:26:13 +08:00
|
|
|
#ifdef CONFIG_SCSI_SAS_ATA
|
2007-01-27 06:08:43 +08:00
|
|
|
error = sas_discover_sata(dev);
|
2006-08-29 22:22:51 +08:00
|
|
|
break;
|
2008-03-27 00:26:13 +08:00
|
|
|
#else
|
|
|
|
SAS_DPRINTK("ATA device seen but CONFIG_SCSI_SAS_ATA=N so cannot attach\n");
|
|
|
|
/* Fall through */
|
2007-07-23 02:15:55 +08:00
|
|
|
#endif
|
2006-08-29 22:22:51 +08:00
|
|
|
default:
|
2007-07-23 02:15:55 +08:00
|
|
|
error = -ENXIO;
|
2007-01-27 06:08:43 +08:00
|
|
|
SAS_DPRINTK("unhandled device %d\n", dev->dev_type);
|
2006-08-29 22:22:51 +08:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (error) {
|
2007-01-27 06:08:43 +08:00
|
|
|
sas_rphy_free(dev->rphy);
|
2011-11-18 09:59:51 +08:00
|
|
|
list_del_init(&dev->disco_list_node);
|
2007-07-17 02:15:51 +08:00
|
|
|
spin_lock_irq(&port->dev_list_lock);
|
2007-01-27 06:08:43 +08:00
|
|
|
list_del_init(&dev->dev_list_node);
|
2007-07-17 02:15:51 +08:00
|
|
|
spin_unlock_irq(&port->dev_list_lock);
|
2007-01-12 06:14:49 +08:00
|
|
|
|
2011-11-18 09:59:47 +08:00
|
|
|
sas_put_device(dev);
|
2006-08-29 22:22:51 +08:00
|
|
|
port->port_dev = NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
SAS_DPRINTK("DONE DISCOVERY on port %d, pid:%d, result:%d\n", port->id,
|
2007-10-19 14:40:40 +08:00
|
|
|
task_pid_nr(current), error);
|
2006-08-29 22:22:51 +08:00
|
|
|
}
|
|
|
|
|
2006-11-22 22:57:56 +08:00
|
|
|
static void sas_revalidate_domain(struct work_struct *work)
|
2006-08-29 22:22:51 +08:00
|
|
|
{
|
|
|
|
int res = 0;
|
2012-03-10 03:00:06 +08:00
|
|
|
struct sas_discovery_event *ev = to_sas_discovery_event(work);
|
2006-11-22 22:57:56 +08:00
|
|
|
struct asd_sas_port *port = ev->port;
|
2011-11-18 09:59:51 +08:00
|
|
|
struct sas_ha_struct *ha = port->ha;
|
|
|
|
|
|
|
|
/* prevent revalidation from finding sata links in recovery */
|
|
|
|
mutex_lock(&ha->disco_mutex);
|
|
|
|
if (test_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state)) {
|
|
|
|
SAS_DPRINTK("REVALIDATION DEFERRED on port %d, pid:%d\n",
|
|
|
|
port->id, task_pid_nr(current));
|
|
|
|
goto out;
|
|
|
|
}
|
2006-08-29 22:22:51 +08:00
|
|
|
|
2011-11-18 09:59:49 +08:00
|
|
|
clear_bit(DISCE_REVALIDATE_DOMAIN, &port->disc.pending);
|
2006-08-29 22:22:51 +08:00
|
|
|
|
|
|
|
SAS_DPRINTK("REVALIDATING DOMAIN on port %d, pid:%d\n", port->id,
|
2007-10-19 14:40:40 +08:00
|
|
|
task_pid_nr(current));
|
2011-11-18 09:59:51 +08:00
|
|
|
|
2006-08-29 22:22:51 +08:00
|
|
|
if (port->port_dev)
|
|
|
|
res = sas_ex_revalidate_domain(port->port_dev);
|
|
|
|
|
|
|
|
SAS_DPRINTK("done REVALIDATING DOMAIN on port %d, pid:%d, res 0x%x\n",
|
2007-10-19 14:40:40 +08:00
|
|
|
port->id, task_pid_nr(current), res);
|
2011-11-18 09:59:51 +08:00
|
|
|
out:
|
|
|
|
mutex_unlock(&ha->disco_mutex);
|
2006-08-29 22:22:51 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* ---------- Events ---------- */
|
|
|
|
|
2012-03-10 03:00:06 +08:00
|
|
|
static void sas_chain_work(struct sas_ha_struct *ha, struct sas_work *sw)
|
2011-12-20 08:42:34 +08:00
|
|
|
{
|
2012-03-10 03:00:06 +08:00
|
|
|
/* chained work is not subject to SA_HA_DRAINING or
|
|
|
|
* SAS_HA_REGISTERED, because it is either submitted in the
|
|
|
|
* workqueue, or known to be submitted from a context that is
|
|
|
|
* not racing against draining
|
|
|
|
*/
|
|
|
|
scsi_queue_work(ha->core.shost, &sw->work);
|
2011-12-20 08:42:34 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static void sas_chain_event(int event, unsigned long *pending,
|
2012-03-10 03:00:06 +08:00
|
|
|
struct sas_work *sw,
|
2011-12-20 08:42:34 +08:00
|
|
|
struct sas_ha_struct *ha)
|
|
|
|
{
|
|
|
|
if (!test_and_set_bit(event, pending)) {
|
|
|
|
unsigned long flags;
|
|
|
|
|
2012-06-22 14:25:27 +08:00
|
|
|
spin_lock_irqsave(&ha->lock, flags);
|
2012-03-10 03:00:06 +08:00
|
|
|
sas_chain_work(ha, sw);
|
2012-06-22 14:25:27 +08:00
|
|
|
spin_unlock_irqrestore(&ha->lock, flags);
|
2011-12-20 08:42:34 +08:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2006-08-29 22:22:51 +08:00
|
|
|
int sas_discover_event(struct asd_sas_port *port, enum discover_event ev)
|
|
|
|
{
|
|
|
|
struct sas_discovery *disc;
|
|
|
|
|
|
|
|
if (!port)
|
|
|
|
return 0;
|
|
|
|
disc = &port->disc;
|
|
|
|
|
|
|
|
BUG_ON(ev >= DISC_NUM_EVENTS);
|
|
|
|
|
2011-12-20 08:42:34 +08:00
|
|
|
sas_chain_event(ev, &disc->pending, &disc->disc_work[ev].work, port->ha);
|
2006-08-29 22:22:51 +08:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* sas_init_disc -- initialize the discovery struct in the port
|
|
|
|
* @port: pointer to struct port
|
|
|
|
*
|
|
|
|
* Called when the ports are being initialized.
|
|
|
|
*/
|
|
|
|
void sas_init_disc(struct sas_discovery *disc, struct asd_sas_port *port)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
2006-11-22 22:57:56 +08:00
|
|
|
static const work_func_t sas_event_fns[DISC_NUM_EVENTS] = {
|
2006-08-29 22:22:51 +08:00
|
|
|
[DISCE_DISCOVER_DOMAIN] = sas_discover_domain,
|
|
|
|
[DISCE_REVALIDATE_DOMAIN] = sas_revalidate_domain,
|
2012-01-19 12:14:01 +08:00
|
|
|
[DISCE_PROBE] = sas_probe_devices,
|
2012-06-22 14:41:51 +08:00
|
|
|
[DISCE_SUSPEND] = sas_suspend_devices,
|
|
|
|
[DISCE_RESUME] = sas_resume_devices,
|
2011-11-18 09:59:51 +08:00
|
|
|
[DISCE_DESTRUCT] = sas_destruct_devices,
|
2006-08-29 22:22:51 +08:00
|
|
|
};
|
|
|
|
|
|
|
|
disc->pending = 0;
|
2006-11-22 22:57:56 +08:00
|
|
|
for (i = 0; i < DISC_NUM_EVENTS; i++) {
|
2012-03-10 03:00:06 +08:00
|
|
|
INIT_SAS_WORK(&disc->disc_work[i].work, sas_event_fns[i]);
|
2006-11-22 22:57:56 +08:00
|
|
|
disc->disc_work[i].port = port;
|
|
|
|
}
|
2006-08-29 22:22:51 +08:00
|
|
|
}
|