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[SCSI] mpt2sas : Device removal algorithm in interrupt context only 

external host not connecting after controller reboot: The
problem is : devices are not coming back after having the cable
disconnected then reconnected. The problem is because the
driver/firmware device removal handshake is failing. Due to this failure,
the controller firmware is not sending out device add events when the target
is reconnected. This is root caused to a race in the driver/firmware device
removal algorithm. There is duplicate code in both interrupt and user
context; where target reset is being issue from user context path while
sas_iounit_control(OP_REMOVE) is being sent from interrupt context. An
active target_reset will fail the OP_REMOVE. To fix this problem, the
duplicate code has been removed from user context path.

Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Kashyap, Desai 2010-03-09 17:34:13 +05:30 committed by James Bottomley
parent 40956059fb
commit 1278b11f46
2 changed files with 123 additions and 195 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/scsi/mpt2sas/mpt2sas_base.h
View File

@ -259,16 +259,6 @@ struct _internal_cmd {
u16 smid;
};
/*
* SAS Topology Structures
*/
#define MPTSAS_STATE_TR_SEND 0x0001
#define MPTSAS_STATE_TR_COMPLETE 0x0002
#define MPTSAS_STATE_CNTRL_SEND 0x0004
#define MPTSAS_STATE_CNTRL_COMPLETE 0x0008
#define MPT2SAS_REQ_SAS_CNTRL 0x0010
/**
* struct _sas_device - attached device information
@ -306,7 +296,6 @@ struct _sas_device {
u16 slot;
u8 hidden_raid_component;
u8 responding;
u16 state;
};
/**

307
drivers/scsi/mpt2sas/mpt2sas_scsih.c
View File

@ -2546,25 +2546,24 @@ static void
_scsih_tm_tr_send(struct MPT2SAS_ADAPTER *ioc, u16 handle)
{
Mpi2SCSITaskManagementRequest_t *mpi_request;
struct MPT2SAS_TARGET *sas_target_priv_data;
u16 smid;
struct _sas_device *sas_device;
unsigned long flags;
struct _tr_list *delayed_tr;
if (ioc->shost_recovery) {
printk(MPT2SAS_INFO_FMT "%s: host reset in progress!\n",
__func__, ioc->name);
if (ioc->shost_recovery || ioc->remove_host) {
dewtprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: host reset in "
"progress!\n", __func__, ioc->name));
return;
}
spin_lock_irqsave(&ioc->sas_device_lock, flags);
sas_device = _scsih_sas_device_find_by_handle(ioc, handle);
spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
/* skip is hidden raid component */
if (sas_device && sas_device->hidden_raid_component)
if (sas_device && sas_device->hidden_raid_component) {
spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
return;
}
spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
smid = mpt2sas_base_get_smid_hpr(ioc, ioc->tm_tr_cb_idx);
if (!smid) {
@ -2573,36 +2572,16 @@ _scsih_tm_tr_send(struct MPT2SAS_ADAPTER *ioc, u16 handle)
return;
INIT_LIST_HEAD(&delayed_tr->list);
delayed_tr->handle = handle;
delayed_tr->state = MPT2SAS_REQ_SAS_CNTRL;
list_add_tail(&delayed_tr->list,
&ioc->delayed_tr_list);
if (sas_device && sas_device->starget) {
dewtprintk(ioc, starget_printk(KERN_INFO,
sas_device->starget, "DELAYED:tr:handle(0x%04x), "
"(open)\n", handle));
} else {
dewtprintk(ioc, printk(MPT2SAS_INFO_FMT
"DELAYED:tr:handle(0x%04x), (open)\n",
ioc->name, handle));
}
list_add_tail(&delayed_tr->list, &ioc->delayed_tr_list);
dewtprintk(ioc, printk(MPT2SAS_INFO_FMT
"DELAYED:tr:handle(0x%04x), (open)\n",
ioc->name, handle));
return;
}
if (sas_device) {
sas_device->state |= MPTSAS_STATE_TR_SEND;
sas_device->state |= MPT2SAS_REQ_SAS_CNTRL;
if (sas_device->starget && sas_device->starget->hostdata) {
sas_target_priv_data = sas_device->starget->hostdata;
sas_target_priv_data->tm_busy = 1;
dewtprintk(ioc, starget_printk(KERN_INFO,
sas_device->starget, "tr:handle(0x%04x), (open)\n",
handle));
}
} else {
dewtprintk(ioc, printk(MPT2SAS_INFO_FMT
"tr:handle(0x%04x), (open)\n", ioc->name, handle));
}
dewtprintk(ioc, printk(MPT2SAS_INFO_FMT "tr_send:handle(0x%04x), "
"(open), smid(%d), cb(%d)\n", ioc->name, handle, smid,
ioc->tm_tr_cb_idx));
mpi_request = mpt2sas_base_get_msg_frame(ioc, smid);
memset(mpi_request, 0, sizeof(Mpi2SCSITaskManagementRequest_t));
mpi_request->Function = MPI2_FUNCTION_SCSI_TASK_MGMT;
@ -2632,35 +2611,15 @@ static u8
_scsih_sas_control_complete(struct MPT2SAS_ADAPTER *ioc, u16 smid,
u8 msix_index, u32 reply)
{
unsigned long flags;
u16 handle;
struct _sas_device *sas_device;
Mpi2SasIoUnitControlReply_t *mpi_reply =
mpt2sas_base_get_reply_virt_addr(ioc, reply);
handle = le16_to_cpu(mpi_reply->DevHandle);
spin_lock_irqsave(&ioc->sas_device_lock, flags);
sas_device = _scsih_sas_device_find_by_handle(ioc, handle);
spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
if (sas_device) {
sas_device->state |= MPTSAS_STATE_CNTRL_COMPLETE;
if (sas_device->starget)
dewtprintk(ioc, starget_printk(KERN_INFO,
sas_device->starget,
"sc_complete:handle(0x%04x), "
"ioc_status(0x%04x), loginfo(0x%08x)\n",
handle, le16_to_cpu(mpi_reply->IOCStatus),
le32_to_cpu(mpi_reply->IOCLogInfo)));
} else {
dewtprintk(ioc, printk(MPT2SAS_INFO_FMT
"sc_complete:handle(0x%04x), "
"ioc_status(0x%04x), loginfo(0x%08x)\n",
ioc->name, handle, le16_to_cpu(mpi_reply->IOCStatus),
le32_to_cpu(mpi_reply->IOCLogInfo)));
}
dewtprintk(ioc, printk(MPT2SAS_INFO_FMT
"sc_complete:handle(0x%04x), (open) "
"smid(%d), ioc_status(0x%04x), loginfo(0x%08x)\n",
ioc->name, le16_to_cpu(mpi_reply->DevHandle), smid,
le16_to_cpu(mpi_reply->IOCStatus),
le32_to_cpu(mpi_reply->IOCLogInfo)));
return 1;
}
@ -2684,87 +2643,63 @@ static u8
_scsih_tm_tr_complete(struct MPT2SAS_ADAPTER *ioc, u16 smid, u8 msix_index,
u32 reply)
{
unsigned long flags;
u16 handle;
struct _sas_device *sas_device;
Mpi2SCSITaskManagementRequest_t *mpi_request_tm;
Mpi2SCSITaskManagementReply_t *mpi_reply =
mpt2sas_base_get_reply_virt_addr(ioc, reply);
Mpi2SasIoUnitControlRequest_t *mpi_request;
u16 smid_sas_ctrl;
struct MPT2SAS_TARGET *sas_target_priv_data;
struct _tr_list *delayed_tr;
u8 rc;
handle = le16_to_cpu(mpi_reply->DevHandle);
spin_lock_irqsave(&ioc->sas_device_lock, flags);
sas_device = _scsih_sas_device_find_by_handle(ioc, handle);
spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
if (sas_device) {
sas_device->state |= MPTSAS_STATE_TR_COMPLETE;
if (sas_device->starget) {
dewtprintk(ioc, starget_printk(KERN_INFO,
sas_device->starget, "tr_complete:handle(0x%04x), "
"(%s) ioc_status(0x%04x), loginfo(0x%08x), "
"completed(%d)\n", sas_device->handle,
(sas_device->state & MPT2SAS_REQ_SAS_CNTRL) ?
"open" : "active",
le16_to_cpu(mpi_reply->IOCStatus),
le32_to_cpu(mpi_reply->IOCLogInfo),
le32_to_cpu(mpi_reply->TerminationCount)));
if (sas_device->starget->hostdata) {
sas_target_priv_data =
sas_device->starget->hostdata;
sas_target_priv_data->tm_busy = 0;
}
}
} else {
dewtprintk(ioc, printk(MPT2SAS_INFO_FMT
"tr_complete:handle(0x%04x), (open) ioc_status(0x%04x), "
"loginfo(0x%08x), completed(%d)\n", ioc->name,
handle, le16_to_cpu(mpi_reply->IOCStatus),
le32_to_cpu(mpi_reply->IOCLogInfo),
le32_to_cpu(mpi_reply->TerminationCount)));
if (ioc->shost_recovery || ioc->remove_host) {
dewtprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: host reset in "
"progress!\n", __func__, ioc->name));
return 1;
}
if (!list_empty(&ioc->delayed_tr_list)) {
delayed_tr = list_entry(ioc->delayed_tr_list.next,
struct _tr_list, list);
mpt2sas_base_free_smid(ioc, smid);
if (delayed_tr->state & MPT2SAS_REQ_SAS_CNTRL)
_scsih_tm_tr_send(ioc, delayed_tr->handle);
list_del(&delayed_tr->list);
kfree(delayed_tr);
rc = 0; /* tells base_interrupt not to free mf */
} else
rc = 1;
if (sas_device && !(sas_device->state & MPT2SAS_REQ_SAS_CNTRL))
return rc;
if (ioc->shost_recovery) {
printk(MPT2SAS_INFO_FMT "%s: host reset in progress!\n",
__func__, ioc->name);
return rc;
mpi_request_tm = mpt2sas_base_get_msg_frame(ioc, smid);
handle = le16_to_cpu(mpi_request_tm->DevHandle);
if (handle != le16_to_cpu(mpi_reply->DevHandle)) {
dewtprintk(ioc, printk(MPT2SAS_INFO_FMT "spurious interrupt: "
"handle(0x%04x:0x%04x), smid(%d)!!!\n", ioc->name, handle,
le16_to_cpu(mpi_reply->DevHandle), smid));
return 0;
}
dewtprintk(ioc, printk(MPT2SAS_INFO_FMT
"tr_complete:handle(0x%04x), (open) smid(%d), ioc_status(0x%04x), "
"loginfo(0x%08x), completed(%d)\n", ioc->name,
handle, smid, le16_to_cpu(mpi_reply->IOCStatus),
le32_to_cpu(mpi_reply->IOCLogInfo),
le32_to_cpu(mpi_reply->TerminationCount)));
smid_sas_ctrl = mpt2sas_base_get_smid(ioc, ioc->tm_sas_control_cb_idx);
if (!smid_sas_ctrl) {
printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
ioc->name, __func__);
return rc;
return 1;
}
if (sas_device)
sas_device->state |= MPTSAS_STATE_CNTRL_SEND;
dewtprintk(ioc, printk(MPT2SAS_INFO_FMT "sc_send:handle(0x%04x), "
"(open), smid(%d), cb(%d)\n", ioc->name, handle, smid_sas_ctrl,
ioc->tm_sas_control_cb_idx));
mpi_request = mpt2sas_base_get_msg_frame(ioc, smid_sas_ctrl);
memset(mpi_request, 0, sizeof(Mpi2SasIoUnitControlRequest_t));
mpi_request->Function = MPI2_FUNCTION_SAS_IO_UNIT_CONTROL;
mpi_request->Operation = MPI2_SAS_OP_REMOVE_DEVICE;
mpi_request->DevHandle = mpi_reply->DevHandle;
mpi_request->DevHandle = mpi_request_tm->DevHandle;
mpt2sas_base_put_smid_default(ioc, smid_sas_ctrl);
return rc;
if (!list_empty(&ioc->delayed_tr_list)) {
delayed_tr = list_entry(ioc->delayed_tr_list.next,
struct _tr_list, list);
mpt2sas_base_free_smid(ioc, smid);
_scsih_tm_tr_send(ioc, delayed_tr->handle);
list_del(&delayed_tr->list);
kfree(delayed_tr);
return 0; /* tells base_interrupt not to free mf */
}
return 1;
}
/**
@ -4101,67 +4036,38 @@ _scsih_add_device(struct MPT2SAS_ADAPTER *ioc, u16 handle, u8 phy_num, u8 is_pd)
}
/**
* _scsih_remove_device - removing sas device object
* _scsih_remove_pd_device - removing sas device pd object
* @ioc: per adapter object
* @sas_device: the sas_device object
* @sas_device_delete: the sas_device object
*
* For hidden raid components, we do driver-fw handshake from
* hotplug work threads.
* Return nothing.
*/
static void
_scsih_remove_device(struct MPT2SAS_ADAPTER *ioc, struct _sas_device
*sas_device)
_scsih_remove_pd_device(struct MPT2SAS_ADAPTER *ioc, struct _sas_device
sas_device)
{
struct MPT2SAS_TARGET *sas_target_priv_data;
Mpi2SasIoUnitControlReply_t mpi_reply;
Mpi2SasIoUnitControlRequest_t mpi_request;
u16 device_handle, handle;
u16 vol_handle, handle;
if (!sas_device)
return;
handle = sas_device->handle;
handle = sas_device.handle;
dewtprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: enter: handle(0x%04x),"
" sas_addr(0x%016llx)\n", ioc->name, __func__, handle,
(unsigned long long) sas_device->sas_address));
(unsigned long long) sas_device.sas_address));
if (sas_device->starget && sas_device->starget->hostdata) {
sas_target_priv_data = sas_device->starget->hostdata;
sas_target_priv_data->deleted = 1;
}
if (ioc->remove_host || ioc->shost_recovery || !handle)
goto out;
if ((sas_device->state & MPTSAS_STATE_TR_COMPLETE)) {
dewtprintk(ioc, printk(MPT2SAS_INFO_FMT "\tskip "
"target_reset handle(0x%04x)\n", ioc->name,
handle));
goto skip_tr;
}
/* Target Reset to flush out all the outstanding IO */
device_handle = (sas_device->hidden_raid_component) ?
sas_device->volume_handle : handle;
if (device_handle) {
dewtprintk(ioc, printk(MPT2SAS_INFO_FMT "issue target reset: "
"handle(0x%04x)\n", ioc->name, device_handle));
mutex_lock(&ioc->tm_cmds.mutex);
mpt2sas_scsih_issue_tm(ioc, device_handle, 0,
MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET, 0, 10);
ioc->tm_cmds.status = MPT2_CMD_NOT_USED;
mutex_unlock(&ioc->tm_cmds.mutex);
dewtprintk(ioc, printk(MPT2SAS_INFO_FMT "issue target reset "
"done: handle(0x%04x)\n", ioc->name, device_handle));
if (ioc->shost_recovery)
goto out;
}
skip_tr:
if ((sas_device->state & MPTSAS_STATE_CNTRL_COMPLETE)) {
dewtprintk(ioc, printk(MPT2SAS_INFO_FMT "\tskip "
"sas_cntrl handle(0x%04x)\n", ioc->name, handle));
goto out;
}
vol_handle = sas_device.volume_handle;
if (!vol_handle)
return;
dewtprintk(ioc, printk(MPT2SAS_INFO_FMT "issue target reset: "
"handle(0x%04x)\n", ioc->name, vol_handle));
mpt2sas_scsih_issue_tm(ioc, vol_handle, 0,
MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET, 0, 30);
dewtprintk(ioc, printk(MPT2SAS_INFO_FMT "issue target reset "
"done: handle(0x%04x)\n", ioc->name, vol_handle));
if (ioc->shost_recovery)
return;
/* SAS_IO_UNIT_CNTR - send REMOVE_DEVICE */
dewtprintk(ioc, printk(MPT2SAS_INFO_FMT "sas_iounit: handle"
@ -4169,34 +4075,68 @@ _scsih_remove_device(struct MPT2SAS_ADAPTER *ioc, struct _sas_device
memset(&mpi_request, 0, sizeof(Mpi2SasIoUnitControlRequest_t));
mpi_request.Function = MPI2_FUNCTION_SAS_IO_UNIT_CONTROL;
mpi_request.Operation = MPI2_SAS_OP_REMOVE_DEVICE;
mpi_request.DevHandle = handle;
mpi_request.VF_ID = 0; /* TODO */
mpi_request.VP_ID = 0;
mpi_request.DevHandle = cpu_to_le16(handle);
if ((mpt2sas_base_sas_iounit_control(ioc, &mpi_reply,
&mpi_request)) != 0) {
&mpi_request)) != 0)
printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
ioc->name, __FILE__, __LINE__, __func__);
}
dewtprintk(ioc, printk(MPT2SAS_INFO_FMT "sas_iounit: ioc_status"
"(0x%04x), loginfo(0x%08x)\n", ioc->name,
le16_to_cpu(mpi_reply.IOCStatus),
le32_to_cpu(mpi_reply.IOCLogInfo)));
out:
dewtprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: exit: handle(0x%04x),"
" sas_addr(0x%016llx)\n", ioc->name, __func__, handle,
(unsigned long long) sas_device.sas_address));
}
_scsih_ublock_io_device(ioc, handle);
/**
* _scsih_remove_device - removing sas device object
* @ioc: per adapter object
* @sas_device_delete: the sas_device object
*
* Return nothing.
*/
static void
_scsih_remove_device(struct MPT2SAS_ADAPTER *ioc,
struct _sas_device *sas_device)
{
struct _sas_device sas_device_backup;
struct MPT2SAS_TARGET *sas_target_priv_data;
mpt2sas_transport_port_remove(ioc, sas_device->sas_address,
sas_device->sas_address_parent);
if (!sas_device)
return;
printk(MPT2SAS_INFO_FMT "removing handle(0x%04x), sas_addr"
"(0x%016llx)\n", ioc->name, handle,
(unsigned long long) sas_device->sas_address);
memcpy(&sas_device_backup, sas_device, sizeof(struct _sas_device));
_scsih_sas_device_remove(ioc, sas_device);
dewtprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: exit: handle"
"(0x%04x)\n", ioc->name, __func__, handle));
dewtprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: enter: "
"handle(0x%04x), sas_addr(0x%016llx)\n", ioc->name, __func__,
sas_device_backup.handle, (unsigned long long)
sas_device_backup.sas_address));
if (sas_device_backup.starget && sas_device_backup.starget->hostdata) {
sas_target_priv_data = sas_device_backup.starget->hostdata;
sas_target_priv_data->deleted = 1;
}
if (sas_device_backup.hidden_raid_component)
_scsih_remove_pd_device(ioc, sas_device_backup);
_scsih_ublock_io_device(ioc, sas_device_backup.handle);
mpt2sas_transport_port_remove(ioc, sas_device_backup.sas_address,
sas_device_backup.sas_address_parent);
printk(MPT2SAS_INFO_FMT "removing handle(0x%04x), sas_addr"
"(0x%016llx)\n", ioc->name, sas_device_backup.handle,
(unsigned long long) sas_device_backup.sas_address);
dewtprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: exit: "
"handle(0x%04x), sas_addr(0x%016llx)\n", ioc->name, __func__,
sas_device_backup.handle, (unsigned long long)
sas_device_backup.sas_address));
}
#ifdef CONFIG_SCSI_MPT2SAS_LOGGING
@ -5442,7 +5382,6 @@ _scsih_mark_responding_sas_device(struct MPT2SAS_ADAPTER *ioc, u64 sas_address,
if (sas_device->sas_address == sas_address &&
sas_device->slot == slot && sas_device->starget) {
sas_device->responding = 1;
sas_device->state = 0;
starget = sas_device->starget;
sas_target_priv_data = starget->hostdata;
sas_target_priv_data->tm_busy = 0;