Adding support for raid transport layer. This will provide sysfs attributes
containing raid level, state, and resync rate.
MPT2SAS module will select RAID_ATTRS.
Signed-off-by: Kashyap Desai <kashyap.desai@xxxxxxx>
Reviewed-by: Eric Moore <eric.moore@xxxxxxx>
---
diff --git a/drivers/scsi/mpt2sas/Kconfig b/drivers/scsi/mpt2sas/Kconfig
index 70c4c24..ba8e128 100644
--- a/drivers/scsi/mpt2sas/Kconfig
+++ b/drivers/scsi/mpt2sas/Kconfig
@@ -44,6 +44,7 @@ config SCSI_MPT2SAS
tristate "LSI MPT Fusion SAS 2.0 Device Driver"
depends on PCI && SCSI
select SCSI_SAS_ATTRS
+ select RAID_ATTRS
---help---
This driver supports PCI-Express SAS 6Gb/s Host Adapters.
diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.h b/drivers/scsi/mpt2sas/mpt2sas_base.h
index 12fa18b..014318f 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_base.h
+++ b/drivers/scsi/mpt2sas/mpt2sas_base.h
@@ -323,6 +323,7 @@ struct _sas_device {
* @device_info: bitfield provides detailed info about the hidden components
* @num_pds: number of hidden raid components
* @responding: used in _scsih_raid_device_mark_responding
+ * @percent_complete: resync percent complete
*/
struct _raid_device {
struct list_head list;
@@ -336,6 +337,7 @@ struct _raid_device {
u32 device_info;
u8 num_pds;
u8 responding;
+ u8 percent_complete;
};
/**
diff --git a/drivers/scsi/mpt2sas/mpt2sas_scsih.c b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
index c2b455e..b748893 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_scsih.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
@@ -52,6 +52,7 @@
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
+#include <linux/raid_class.h>
#include "mpt2sas_base.h"
@@ -133,6 +134,9 @@ struct fw_event_work {
void *event_data;
};
+/* raid transport support */
+static struct raid_template *mpt2sas_raid_template;
+
/**
* struct _scsi_io_transfer - scsi io transfer
* @handle: sas device handle (assigned by firmware)
@@ -1419,6 +1423,140 @@ _scsih_display_sata_capabilities(struct MPT2SAS_ADAPTER *ioc,
}
/**
+ * _scsih_is_raid - return boolean indicating device is raid volume
+ * @dev the device struct object
+ */
+static int
+_scsih_is_raid(struct device *dev)
+{
+ struct scsi_device *sdev = to_scsi_device(dev);
+
+ return (sdev->channel == RAID_CHANNEL) ? 1 : 0;
+}
+
+/**
+ * _scsih_get_resync - get raid volume resync percent complete
+ * @dev the device struct object
+ */
+static void
+_scsih_get_resync(struct device *dev)
+{
+ struct scsi_device *sdev = to_scsi_device(dev);
+ struct MPT2SAS_ADAPTER *ioc = shost_priv(sdev->host);
+ static struct _raid_device *raid_device;
+ unsigned long flags;
+ Mpi2RaidVolPage0_t vol_pg0;
+ Mpi2ConfigReply_t mpi_reply;
+ u32 volume_status_flags;
+ u8 percent_complete = 0;
+
+ spin_lock_irqsave(&ioc->raid_device_lock, flags);
+ raid_device = _scsih_raid_device_find_by_id(ioc, sdev->id,
+ sdev->channel);
+ spin_unlock_irqrestore(&ioc->raid_device_lock, flags);
+
+ if (!raid_device)
+ goto out;
+
+ if (mpt2sas_config_get_raid_volume_pg0(ioc, &mpi_reply, &vol_pg0,
+ MPI2_RAID_VOLUME_PGAD_FORM_HANDLE, raid_device->handle,
+ sizeof(Mpi2RaidVolPage0_t))) {
+ printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
+ ioc->name, __FILE__, __LINE__, __func__);
+ goto out;
+ }
+
+ volume_status_flags = le32_to_cpu(vol_pg0.VolumeStatusFlags);
+ if (volume_status_flags & MPI2_RAIDVOL0_STATUS_FLAG_RESYNC_IN_PROGRESS)
+ percent_complete = raid_device->percent_complete;
+ out:
+ raid_set_resync(mpt2sas_raid_template, dev, percent_complete);
+}
+
+/**
+ * _scsih_get_state - get raid volume level
+ * @dev the device struct object
+ */
+static void
+_scsih_get_state(struct device *dev)
+{
+ struct scsi_device *sdev = to_scsi_device(dev);
+ struct MPT2SAS_ADAPTER *ioc = shost_priv(sdev->host);
+ static struct _raid_device *raid_device;
+ unsigned long flags;
+ Mpi2RaidVolPage0_t vol_pg0;
+ Mpi2ConfigReply_t mpi_reply;
+ u32 volstate;
+ enum raid_state state = RAID_STATE_UNKNOWN;
+
+ spin_lock_irqsave(&ioc->raid_device_lock, flags);
+ raid_device = _scsih_raid_device_find_by_id(ioc, sdev->id,
+ sdev->channel);
+ spin_unlock_irqrestore(&ioc->raid_device_lock, flags);
+
+ if (!raid_device)
+ goto out;
+
+ if (mpt2sas_config_get_raid_volume_pg0(ioc, &mpi_reply, &vol_pg0,
+ MPI2_RAID_VOLUME_PGAD_FORM_HANDLE, raid_device->handle,
+ sizeof(Mpi2RaidVolPage0_t))) {
+ printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
+ ioc->name, __FILE__, __LINE__, __func__);
+ goto out;
+ }
+
+ volstate = le32_to_cpu(vol_pg0.VolumeStatusFlags);
+ if (volstate & MPI2_RAIDVOL0_STATUS_FLAG_RESYNC_IN_PROGRESS) {
+ state = RAID_STATE_RESYNCING;
+ goto out;
+ }
+
+ switch (vol_pg0.VolumeState) {
+ case MPI2_RAID_VOL_STATE_OPTIMAL:
+ case MPI2_RAID_VOL_STATE_ONLINE:
+ state = RAID_STATE_ACTIVE;
+ break;
+ case MPI2_RAID_VOL_STATE_DEGRADED:
+ state = RAID_STATE_DEGRADED;
+ break;
+ case MPI2_RAID_VOL_STATE_FAILED:
+ case MPI2_RAID_VOL_STATE_MISSING:
+ state = RAID_STATE_OFFLINE;
+ break;
+ }
+ out:
+ raid_set_state(mpt2sas_raid_template, dev, state);
+}
+
+/**
+ * _scsih_set_level - set raid level
+ * @sdev: scsi device struct
+ * @raid_device: raid_device object
+ */
+static void
+_scsih_set_level(struct scsi_device *sdev, struct _raid_device *raid_device)
+{
+ enum raid_level level = RAID_LEVEL_UNKNOWN;
+
+ switch (raid_device->volume_type) {
+ case MPI2_RAID_VOL_TYPE_RAID0:
+ level = RAID_LEVEL_0;
+ break;
+ case MPI2_RAID_VOL_TYPE_RAID10:
+ level = RAID_LEVEL_10;
+ break;
+ case MPI2_RAID_VOL_TYPE_RAID1E:
+ level = RAID_LEVEL_1E;
+ break;
+ case MPI2_RAID_VOL_TYPE_RAID1:
+ level = RAID_LEVEL_1;
+ break;
+ }
+
+ raid_set_level(mpt2sas_raid_template, &sdev->sdev_gendev, level);
+}
+
+/**
* _scsih_get_volume_capabilities - volume capabilities
* @ioc: per adapter object
* @sas_device: the raid_device object
@@ -1574,6 +1712,8 @@ _scsih_slave_configure(struct scsi_device *sdev)
(unsigned long long)raid_device->wwid,
raid_device->num_pds, ds);
_scsih_change_queue_depth(sdev, qdepth, SCSI_QDEPTH_DEFAULT);
+ /* raid transport support */
+ _scsih_set_level(sdev, raid_device);
return 0;
}
@@ -5170,11 +5310,33 @@ static void
_scsih_sas_ir_operation_status_event(struct MPT2SAS_ADAPTER *ioc,
struct fw_event_work *fw_event)
{
+ Mpi2EventDataIrOperationStatus_t *event_data = fw_event->event_data;
+ static struct _raid_device *raid_device;
+ unsigned long flags;
+ u16 handle;
+
#ifdef CONFIG_SCSI_MPT2SAS_LOGGING
if (ioc->logging_level & MPT_DEBUG_EVENT_WORK_TASK)
_scsih_sas_ir_operation_status_event_debug(ioc,
- fw_event->event_data);
+ event_data);
#endif
+
+ /* code added for raid transport support */
+ if (event_data->RAIDOperation == MPI2_EVENT_IR_RAIDOP_RESYNC) {
+
+ handle = le16_to_cpu(event_data->VolDevHandle);
+
+ spin_lock_irqsave(&ioc->raid_device_lock, flags);
+ raid_device = _scsih_raid_device_find_by_handle(ioc, handle);
+ spin_unlock_irqrestore(&ioc->raid_device_lock, flags);
+
+ if (!raid_device)
+ return;
+
+ if (event_data->RAIDOperation == MPI2_EVENT_IR_RAIDOP_RESYNC)
+ raid_device->percent_complete =
+ event_data->PercentComplete;
+ }
}
/**
@@ -6390,6 +6552,13 @@ static struct pci_driver scsih_driver = {
#endif
};
+/* raid transport support */
+static struct raid_function_template mpt2sas_raid_functions = {
+ .cookie = &scsih_driver_template,
+ .is_raid = _scsih_is_raid,
+ .get_resync = _scsih_get_resync,
+ .get_state = _scsih_get_state,
+};
/**
* _scsih_init - main entry point for this driver.
@@ -6409,6 +6578,12 @@ _scsih_init(void)
sas_attach_transport(&mpt2sas_transport_functions);
if (!mpt2sas_transport_template)
return -ENODEV;
+ /* raid transport support */
+ mpt2sas_raid_template = raid_class_attach(&mpt2sas_raid_functions);
+ if (!mpt2sas_raid_template) {
+ sas_release_transport(mpt2sas_transport_template);
+ return -ENODEV;
+ }
mpt2sas_base_initialize_callback_handler();
@@ -6443,8 +6618,11 @@ _scsih_init(void)
mpt2sas_ctl_init();
error = pci_register_driver(&scsih_driver);
- if (error)
+ if (error) {
+ /* raid transport support */
+ raid_class_release(mpt2sas_raid_template);
sas_release_transport(mpt2sas_transport_template);
+ }
return error;
}
@@ -6462,7 +6640,8 @@ _scsih_exit(void)
pci_unregister_driver(&scsih_driver);
- sas_release_transport(mpt2sas_transport_template);
+ mpt2sas_ctl_exit();
+
mpt2sas_base_release_callback_handler(scsi_io_cb_idx);
mpt2sas_base_release_callback_handler(tm_cb_idx);
mpt2sas_base_release_callback_handler(base_cb_idx);
@@ -6474,7 +6653,10 @@ _scsih_exit(void)
mpt2sas_base_release_callback_handler(tm_tr_cb_idx);
mpt2sas_base_release_callback_handler(tm_sas_control_cb_idx);
- mpt2sas_ctl_exit();
+ /* raid transport support */
+ raid_class_release(mpt2sas_raid_template);
+ sas_release_transport(mpt2sas_transport_template);
+
}
module_init(_scsih_init);
diff --git a/include/linux/raid_class.h b/include/linux/raid_class.h
index 6b537f1..31e1ff6 100644
--- a/include/linux/raid_class.h
+++ b/include/linux/raid_class.h
@@ -32,6 +32,7 @@ enum raid_level {
RAID_LEVEL_0,
RAID_LEVEL_1,
RAID_LEVEL_10,
+ RAID_LEVEL_1E,
RAID_LEVEL_3,
RAID_LEVEL_4,
RAID_LEVEL_5,
--
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