[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>
diff --git a/drivers/scsi/mpt2sas/mpt2sas_scsih.c b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
index 72a9453..6d9f997 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_scsih.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
@@ -2546,25 +2546,24 @@
_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 @@
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 @@
_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 @@
_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_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 @@
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 @@
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;
