[SCSI] fusion - expander hotplug suport in mptsas module
This adds support for hot adding and removing expanders, and its associated attached devices. When there is a change in topology, the fusion firmware sends the MPI_EVENT_SAS_DISCOVERY event to the driver. The driver will read firmware config pages to determine what changes took place, and refresh drivers view of the world stored in ioc->sas_topology. Here is the details of the action the driver does: (1) Expander Added : The mptsas_discovery_work workqueue is called. Config pages read, and ioc->sas_topology is refreshed. The sas_phy_add() is called for each phy of the expander. The expanders attached devices are added via sas_rphy_add(). Added end devices are handled within the MPT_ADD_DEVICE logic in mptsas_hotplug_work workqueue. (2) Expander Delete : The sas_rphy_delete() will be called for the top most compenent of the parent that the expander is attached to. The sas_rphy_delete call will delete all the children phys, rphys, and end devices. This is handled from mptsas_discovery_work workqueue. Signed-off-by: Eric Moore <Eric.Moore@lsil.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Moore, Eric
James Bottomley
parent
f44e5461d9
commit
e6b2d76a49
2 changed files with 289 additions and 69 deletions
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@ -619,6 +619,10 @@ typedef struct _MPT_ADAPTER
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struct net_device *netdev;
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struct list_head sas_topology;
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struct mutex sas_topology_mutex;
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struct mutex sas_discovery_mutex;
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u8 sas_discovery_runtime;
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u8 sas_discovery_ignore_events;
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int sas_index; /* index refrencing */
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MPT_SAS_MGMT sas_mgmt;
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int num_ports;
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struct work_struct mptscsih_persistTask;
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@ -108,6 +108,11 @@ struct mptsas_hotplug_event {
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u8 phys_disk_num_valid;
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};
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struct mptsas_discovery_event {
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struct work_struct work;
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MPT_ADAPTER *ioc;
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};
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/*
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* SAS topology structures
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*
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@ -163,7 +168,6 @@ struct mptsas_enclosure {
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u8 sep_channel; /* SEP channel logical channel id */
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};
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#ifdef SASDEBUG
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static void mptsas_print_phy_data(MPI_SAS_IO_UNIT0_PHY_DATA *phy_data)
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{
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@ -273,6 +277,27 @@ static inline MPT_ADAPTER *rphy_to_ioc(struct sas_rphy *rphy)
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return ((MPT_SCSI_HOST *)shost->hostdata)->ioc;
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}
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/*
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* mptsas_find_portinfo_by_handle
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*
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* This function should be called with the sas_topology_mutex already held
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*/
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static struct mptsas_portinfo *
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mptsas_find_portinfo_by_handle(MPT_ADAPTER *ioc, u16 handle)
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{
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struct mptsas_portinfo *port_info, *rc=NULL;
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int i;
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list_for_each_entry(port_info, &ioc->sas_topology, list)
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for (i = 0; i < port_info->num_phys; i++)
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if (port_info->phy_info[i].identify.handle == handle) {
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rc = port_info;
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goto out;
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}
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out:
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return rc;
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}
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static int
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mptsas_sas_enclosure_pg0(MPT_ADAPTER *ioc, struct mptsas_enclosure *enclosure,
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u32 form, u32 form_specific)
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@ -423,32 +448,8 @@ mptsas_slave_destroy(struct scsi_device *sdev)
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{
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struct Scsi_Host *host = sdev->host;
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MPT_SCSI_HOST *hd = (MPT_SCSI_HOST *)host->hostdata;
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struct sas_rphy *rphy;
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struct mptsas_portinfo *p;
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int i;
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VirtDevice *vdev;
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/*
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* Handle hotplug removal case.
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* We need to clear out attached data structure.
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*/
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rphy = dev_to_rphy(sdev->sdev_target->dev.parent);
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mutex_lock(&hd->ioc->sas_topology_mutex);
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list_for_each_entry(p, &hd->ioc->sas_topology, list) {
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for (i = 0; i < p->num_phys; i++) {
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if (p->phy_info[i].attached.sas_address ==
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rphy->identify.sas_address) {
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memset(&p->phy_info[i].attached, 0,
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sizeof(struct mptsas_devinfo));
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p->phy_info[i].rphy = NULL;
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goto out;
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}
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}
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}
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out:
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mutex_unlock(&hd->ioc->sas_topology_mutex);
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/*
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* Issue target reset to flush firmware outstanding commands.
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*/
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@ -1044,7 +1045,6 @@ mptsas_sas_expander_pg1(MPT_ADAPTER *ioc, struct mptsas_phyinfo *phy_info,
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phy_info->identify.handle = le16_to_cpu(buffer->OwnerDevHandle);
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phy_info->attached.handle = le16_to_cpu(buffer->AttachedDevHandle);
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out_free_consistent:
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pci_free_consistent(ioc->pcidev, hdr.ExtPageLength * 4,
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buffer, dma_handle);
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@ -1134,12 +1134,19 @@ mptsas_parse_device_info(struct sas_identify *identify,
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static int mptsas_probe_one_phy(struct device *dev,
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struct mptsas_phyinfo *phy_info, int index, int local)
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{
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MPT_ADAPTER *ioc;
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struct sas_phy *phy;
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int error;
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if (!dev)
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return -ENODEV;
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if (!phy_info->phy) {
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phy = sas_phy_alloc(dev, index);
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if (!phy)
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return -ENOMEM;
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} else
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phy = phy_info->phy;
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phy->port_identifier = phy_info->port_id;
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mptsas_parse_device_info(&phy->identify, &phy_info->identify);
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@ -1225,6 +1232,8 @@ static int mptsas_probe_one_phy(struct device *dev,
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break;
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}
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if (!phy_info->phy) {
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if (local)
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phy->local_attached = 1;
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@ -1234,10 +1243,24 @@ static int mptsas_probe_one_phy(struct device *dev,
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return error;
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}
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phy_info->phy = phy;
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}
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if ((phy_info->attached.handle) &&
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(!phy_info->rphy)) {
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if (phy_info->attached.handle) {
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struct sas_rphy *rphy;
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ioc = phy_to_ioc(phy_info->phy);
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/*
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* Let the hotplug_work thread handle processing
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* the adding/removing of devices that occur
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* after start of day.
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*/
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if (ioc->sas_discovery_runtime &&
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mptsas_is_end_device(&phy_info->attached))
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return 0;
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rphy = sas_rphy_alloc(phy);
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if (!rphy)
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return 0; /* non-fatal: an rphy can be added later */
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@ -1256,24 +1279,37 @@ static int mptsas_probe_one_phy(struct device *dev,
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}
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static int
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mptsas_probe_hba_phys(MPT_ADAPTER *ioc, int *index)
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mptsas_probe_hba_phys(MPT_ADAPTER *ioc)
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{
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struct mptsas_portinfo *port_info;
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struct mptsas_portinfo *port_info, *hba;
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u32 handle = 0xFFFF;
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int error = -ENOMEM, i;
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port_info = kzalloc(sizeof(*port_info), GFP_KERNEL);
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if (!port_info)
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hba = kzalloc(sizeof(*port_info), GFP_KERNEL);
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if (! hba)
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goto out;
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error = mptsas_sas_io_unit_pg0(ioc, port_info);
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error = mptsas_sas_io_unit_pg0(ioc, hba);
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if (error)
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goto out_free_port_info;
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ioc->num_ports = port_info->num_phys;
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mutex_lock(&ioc->sas_topology_mutex);
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port_info = mptsas_find_portinfo_by_handle(ioc, hba->handle);
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if (!port_info) {
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port_info = hba;
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list_add_tail(&port_info->list, &ioc->sas_topology);
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} else {
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port_info->handle = hba->handle;
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for (i = 0; i < hba->num_phys; i++)
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port_info->phy_info[i].negotiated_link_rate =
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hba->phy_info[i].negotiated_link_rate;
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if (hba->phy_info)
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kfree(hba->phy_info);
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kfree(hba);
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hba = NULL;
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}
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mutex_unlock(&ioc->sas_topology_mutex);
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ioc->num_ports = port_info->num_phys;
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for (i = 0; i < port_info->num_phys; i++) {
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mptsas_sas_phy_pg0(ioc, &port_info->phy_info[i],
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@ -1296,38 +1332,49 @@ mptsas_probe_hba_phys(MPT_ADAPTER *ioc, int *index)
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}
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mptsas_probe_one_phy(&ioc->sh->shost_gendev,
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&port_info->phy_info[i], *index, 1);
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(*index)++;
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&port_info->phy_info[i], ioc->sas_index, 1);
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ioc->sas_index++;
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}
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return 0;
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out_free_port_info:
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kfree(port_info);
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if (hba)
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kfree(hba);
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out:
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return error;
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}
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static int
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mptsas_probe_expander_phys(MPT_ADAPTER *ioc, u32 *handle, int *index)
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mptsas_probe_expander_phys(MPT_ADAPTER *ioc, u32 *handle)
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{
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struct mptsas_portinfo *port_info, *p;
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struct mptsas_portinfo *port_info, *p, *ex;
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int error = -ENOMEM, i, j;
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port_info = kzalloc(sizeof(*port_info), GFP_KERNEL);
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if (!port_info)
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ex = kzalloc(sizeof(*port_info), GFP_KERNEL);
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if (!ex)
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goto out;
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error = mptsas_sas_expander_pg0(ioc, port_info,
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error = mptsas_sas_expander_pg0(ioc, ex,
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(MPI_SAS_EXPAND_PGAD_FORM_GET_NEXT_HANDLE <<
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MPI_SAS_EXPAND_PGAD_FORM_SHIFT), *handle);
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if (error)
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goto out_free_port_info;
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*handle = port_info->handle;
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*handle = ex->handle;
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mutex_lock(&ioc->sas_topology_mutex);
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port_info = mptsas_find_portinfo_by_handle(ioc, *handle);
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if (!port_info) {
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port_info = ex;
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list_add_tail(&port_info->list, &ioc->sas_topology);
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} else {
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port_info->handle = ex->handle;
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if (ex->phy_info)
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kfree(ex->phy_info);
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kfree(ex);
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ex = NULL;
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}
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mutex_unlock(&ioc->sas_topology_mutex);
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for (i = 0; i < port_info->num_phys; i++) {
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@ -1374,28 +1421,101 @@ mptsas_probe_expander_phys(MPT_ADAPTER *ioc, u32 *handle, int *index)
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mutex_unlock(&ioc->sas_topology_mutex);
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mptsas_probe_one_phy(parent, &port_info->phy_info[i],
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*index, 0);
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(*index)++;
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ioc->sas_index, 0);
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ioc->sas_index++;
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}
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return 0;
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out_free_port_info:
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kfree(port_info->phy_info);
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kfree(port_info);
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if (ex) {
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if (ex->phy_info)
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kfree(ex->phy_info);
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kfree(ex);
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}
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out:
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return error;
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}
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/*
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* mptsas_delete_expander_phys
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*
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*
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* This will traverse topology, and remove expanders
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* that are no longer present
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*/
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static void
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mptsas_delete_expander_phys(MPT_ADAPTER *ioc)
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{
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struct mptsas_portinfo buffer;
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struct mptsas_portinfo *port_info, *n, *parent;
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int i;
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mutex_lock(&ioc->sas_topology_mutex);
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list_for_each_entry_safe(port_info, n, &ioc->sas_topology, list) {
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if (port_info->phy_info &&
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(!(port_info->phy_info[0].identify.device_info &
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MPI_SAS_DEVICE_INFO_SMP_TARGET)))
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continue;
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if (mptsas_sas_expander_pg0(ioc, &buffer,
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(MPI_SAS_EXPAND_PGAD_FORM_HANDLE <<
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MPI_SAS_EXPAND_PGAD_FORM_SHIFT), port_info->handle)) {
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/*
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* Obtain the port_info instance to the parent port
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*/
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parent = mptsas_find_portinfo_by_handle(ioc,
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port_info->phy_info[0].identify.handle_parent);
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if (!parent)
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goto next_port;
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/*
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* Delete rphys in the parent that point
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* to this expander. The transport layer will
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* cleanup all the children.
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*/
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for (i = 0; i < parent->num_phys; i++) {
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if ((!parent->phy_info[i].rphy) ||
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(parent->phy_info[i].attached.sas_address !=
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port_info->phy_info[i].identify.sas_address))
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continue;
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sas_rphy_delete(parent->phy_info[i].rphy);
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memset(&parent->phy_info[i].attached, 0,
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sizeof(struct mptsas_devinfo));
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parent->phy_info[i].rphy = NULL;
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parent->phy_info[i].starget = NULL;
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}
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next_port:
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list_del(&port_info->list);
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if (port_info->phy_info)
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kfree(port_info->phy_info);
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kfree(port_info);
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}
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/*
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* Free this memory allocated from inside
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* mptsas_sas_expander_pg0
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*/
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if (buffer.phy_info)
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kfree(buffer.phy_info);
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}
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mutex_unlock(&ioc->sas_topology_mutex);
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}
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/*
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* Start of day discovery
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*/
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static void
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mptsas_scan_sas_topology(MPT_ADAPTER *ioc)
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{
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u32 handle = 0xFFFF;
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int index = 0;
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int i;
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mptsas_probe_hba_phys(ioc, &index);
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while (!mptsas_probe_expander_phys(ioc, &handle, &index))
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mutex_lock(&ioc->sas_discovery_mutex);
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mptsas_probe_hba_phys(ioc);
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while (!mptsas_probe_expander_phys(ioc, &handle))
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;
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/*
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Reporting RAID volumes.
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@ -1409,7 +1529,29 @@ mptsas_scan_sas_topology(MPT_ADAPTER *ioc)
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ioc->raid_data.pIocPg2->RaidVolume[i].VolumeID, 0);
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}
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out:
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return;
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mutex_unlock(&ioc->sas_discovery_mutex);
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}
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/*
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* Work queue thread to handle Runtime discovery
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* Mere purpose is the hot add/delete of expanders
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*/
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static void
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mptscsih_discovery_work(void * arg)
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{
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struct mptsas_discovery_event *ev = arg;
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MPT_ADAPTER *ioc = ev->ioc;
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u32 handle = 0xFFFF;
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mutex_lock(&ioc->sas_discovery_mutex);
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ioc->sas_discovery_runtime=1;
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mptsas_delete_expander_phys(ioc);
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mptsas_probe_hba_phys(ioc);
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while (!mptsas_probe_expander_phys(ioc, &handle))
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;
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kfree(ev);
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ioc->sas_discovery_runtime=0;
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mutex_unlock(&ioc->sas_discovery_mutex);
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}
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static struct mptsas_phyinfo *
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@ -1427,10 +1569,8 @@ mptsas_find_phyinfo_by_parent(MPT_ADAPTER *ioc, u16 parent_handle, u8 phy_id)
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(MPI_SAS_DEVICE_PGAD_FORM_HANDLE <<
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MPI_SAS_DEVICE_PGAD_FORM_SHIFT),
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parent_handle);
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if (error) {
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printk("mptsas: failed to retrieve device page\n");
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if (error)
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return NULL;
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}
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/*
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* The phy_info structures are never deallocated during lifetime of
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@ -1502,6 +1642,10 @@ mptsas_reprobe_target(struct scsi_target *starget, int uld_attach)
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mptsas_reprobe_lun);
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}
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/*
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* Work queue thread to handle SAS hotplug events
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*/
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static void
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mptsas_hotplug_work(void *arg)
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{
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@ -1514,10 +1658,13 @@ mptsas_hotplug_work(void *arg)
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struct mptsas_devinfo sas_device;
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VirtTarget *vtarget;
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mutex_lock(&ioc->sas_discovery_mutex);
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switch (ev->event_type) {
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case MPTSAS_DEL_DEVICE:
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phy_info = mptsas_find_phyinfo_by_target(ioc, ev->id);
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/*
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* Sanity checks, for non-existing phys and remote rphys.
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*/
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@ -1567,10 +1714,38 @@ mptsas_hotplug_work(void *arg)
|
|||
MPI_SAS_DEVICE_PGAD_FORM_SHIFT), ev->id))
|
||||
break;
|
||||
|
||||
phy_info = mptsas_find_phyinfo_by_parent(ioc,
|
||||
sas_device.handle_parent, sas_device.phy_id);
|
||||
|
||||
if (!phy_info) {
|
||||
u32 handle = 0xFFFF;
|
||||
|
||||
/*
|
||||
* Its possible when an expander has been hot added
|
||||
* containing attached devices, the sas firmware
|
||||
* may send a RC_ADDED event prior to the
|
||||
* DISCOVERY STOP event. If that occurs, our
|
||||
* view of the topology in the driver in respect to this
|
||||
* expander might of not been setup, and we hit this
|
||||
* condition.
|
||||
* Therefore, this code kicks off discovery to
|
||||
* refresh the data.
|
||||
* Then again, we check whether the parent phy has
|
||||
* been created.
|
||||
*/
|
||||
ioc->sas_discovery_runtime=1;
|
||||
mptsas_delete_expander_phys(ioc);
|
||||
mptsas_probe_hba_phys(ioc);
|
||||
while (!mptsas_probe_expander_phys(ioc, &handle))
|
||||
;
|
||||
ioc->sas_discovery_runtime=0;
|
||||
|
||||
phy_info = mptsas_find_phyinfo_by_parent(ioc,
|
||||
sas_device.handle_parent, sas_device.phy_id);
|
||||
if (!phy_info)
|
||||
break;
|
||||
}
|
||||
|
||||
if (phy_info->starget) {
|
||||
vtarget = phy_info->starget->hostdata;
|
||||
|
||||
|
|
@ -1604,7 +1779,6 @@ mptsas_hotplug_work(void *arg)
|
|||
"attaching %s device, channel %d, id %d, phy %d\n",
|
||||
ioc->name, ds, ev->channel, ev->id, ev->phy_id);
|
||||
|
||||
|
||||
rphy = sas_rphy_alloc(phy_info->phy);
|
||||
if (!rphy)
|
||||
break; /* non-fatal: an rphy can be added later */
|
||||
|
|
@ -1654,6 +1828,7 @@ mptsas_hotplug_work(void *arg)
|
|||
}
|
||||
|
||||
kfree(ev);
|
||||
mutex_unlock(&ioc->sas_discovery_mutex);
|
||||
}
|
||||
|
||||
static void
|
||||
|
|
@ -1767,6 +1942,32 @@ mptscsih_send_raid_event(MPT_ADAPTER *ioc,
|
|||
schedule_work(&ev->work);
|
||||
}
|
||||
|
||||
static void
|
||||
mptscsih_send_discovery(MPT_ADAPTER *ioc,
|
||||
EVENT_DATA_SAS_DISCOVERY *discovery_data)
|
||||
{
|
||||
struct mptsas_discovery_event *ev;
|
||||
|
||||
/*
|
||||
* DiscoveryStatus
|
||||
*
|
||||
* This flag will be non-zero when firmware
|
||||
* kicks off discovery, and return to zero
|
||||
* once its completed.
|
||||
*/
|
||||
if (discovery_data->DiscoveryStatus)
|
||||
return;
|
||||
|
||||
ev = kmalloc(sizeof(*ev), GFP_ATOMIC);
|
||||
if (!ev)
|
||||
return;
|
||||
memset(ev,0,sizeof(struct mptsas_discovery_event));
|
||||
INIT_WORK(&ev->work, mptscsih_discovery_work, ev);
|
||||
ev->ioc = ioc;
|
||||
schedule_work(&ev->work);
|
||||
};
|
||||
|
||||
|
||||
static int
|
||||
mptsas_event_process(MPT_ADAPTER *ioc, EventNotificationReply_t *reply)
|
||||
{
|
||||
|
|
@ -1776,6 +1977,17 @@ mptsas_event_process(MPT_ADAPTER *ioc, EventNotificationReply_t *reply)
|
|||
if (!ioc->sh)
|
||||
goto out;
|
||||
|
||||
/*
|
||||
* sas_discovery_ignore_events
|
||||
*
|
||||
* This flag is to prevent anymore processing of
|
||||
* sas events once mptsas_remove function is called.
|
||||
*/
|
||||
if (ioc->sas_discovery_ignore_events) {
|
||||
rc = mptscsih_event_process(ioc, reply);
|
||||
goto out;
|
||||
}
|
||||
|
||||
switch (event) {
|
||||
case MPI_EVENT_SAS_DEVICE_STATUS_CHANGE:
|
||||
mptscsih_send_sas_event(ioc,
|
||||
|
|
@ -1792,6 +2004,9 @@ mptsas_event_process(MPT_ADAPTER *ioc, EventNotificationReply_t *reply)
|
|||
schedule_work(&ioc->mptscsih_persistTask);
|
||||
break;
|
||||
case MPI_EVENT_SAS_DISCOVERY:
|
||||
mptscsih_send_discovery(ioc,
|
||||
(EVENT_DATA_SAS_DISCOVERY *)reply->Data);
|
||||
break;
|
||||
default:
|
||||
rc = mptscsih_event_process(ioc, reply);
|
||||
break;
|
||||
|
|
@ -1893,7 +2108,7 @@ mptsas_probe(struct pci_dev *pdev, const struct pci_device_id *id)
|
|||
|
||||
INIT_LIST_HEAD(&ioc->sas_topology);
|
||||
mutex_init(&ioc->sas_topology_mutex);
|
||||
|
||||
mutex_init(&ioc->sas_discovery_mutex);
|
||||
mutex_init(&ioc->sas_mgmt.mutex);
|
||||
init_completion(&ioc->sas_mgmt.done);
|
||||
|
||||
|
|
@ -2019,6 +2234,7 @@ static void __devexit mptsas_remove(struct pci_dev *pdev)
|
|||
MPT_ADAPTER *ioc = pci_get_drvdata(pdev);
|
||||
struct mptsas_portinfo *p, *n;
|
||||
|
||||
ioc->sas_discovery_ignore_events=1;
|
||||
sas_remove_host(ioc->sh);
|
||||
|
||||
mutex_lock(&ioc->sas_topology_mutex);
|
||||
|
|
|
|||
Loading…
Reference in a new issue