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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 16:29:59 +00:00
[SCSI] mptsas: support basic hotplug
Adds hotplug support for SAS end devices. Unfortunately the fusion firmware doesn't generate similar events for expanders addition/removal so we can't support them yet. Eric has an idea about a clever scheme to find out about expander changes so that'll be added later on. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
parent
9638d89a75
commit
9a28f49adb
2 changed files with 308 additions and 31 deletions
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@ -612,6 +612,7 @@ typedef struct _MPT_ADAPTER
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struct list_head list;
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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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MPT_SAS_MGMT sas_mgmt;
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} MPT_ADAPTER;
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@ -5,7 +5,7 @@
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*
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* Copyright (c) 1999-2005 LSI Logic Corporation
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* (mailto:mpt_linux_developer@lsil.com)
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* Copyright (c) 2005 Dell
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* Copyright (c) 2005-2006 Dell
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*/
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/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
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/*
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@ -86,6 +86,24 @@ static int mptsasInternalCtx = -1; /* Used only for internal commands */
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static int mptsasMgmtCtx = -1;
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enum mptsas_hotplug_action {
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MPTSAS_ADD_DEVICE,
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MPTSAS_DEL_DEVICE,
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};
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struct mptsas_hotplug_event {
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struct work_struct work;
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MPT_ADAPTER *ioc;
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enum mptsas_hotplug_action event_type;
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u64 sas_address;
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u32 channel;
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u32 id;
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u32 device_info;
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u16 handle;
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u16 parent_handle;
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u8 phy_id;
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};
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/*
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* SAS topology structures
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*
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@ -99,8 +117,8 @@ struct mptsas_devinfo {
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u8 phy_id; /* phy number of parent device */
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u8 port_id; /* sas physical port this device
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is assoc'd with */
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u8 target; /* logical target id of this device */
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u8 bus; /* logical bus number of this device */
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u8 id; /* logical target id of this device */
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u8 channel; /* logical bus number of this device */
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u64 sas_address; /* WWN of this device,
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SATA is assigned by HBA,expander */
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u32 device_info; /* bitfield detailed info about this device */
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@ -114,6 +132,7 @@ struct mptsas_phyinfo {
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u8 programmed_link_rate; /* programmed max/min phy link rate */
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struct mptsas_devinfo identify; /* point to phy device info */
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struct mptsas_devinfo attached; /* point to attached device info */
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struct sas_phy *phy;
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struct sas_rphy *rphy;
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};
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@ -257,24 +276,27 @@ mptsas_slave_alloc(struct scsi_device *sdev)
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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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vdev->target_id =
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p->phy_info[i].attached.target;
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vdev->bus_id = p->phy_info[i].attached.bus;
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p->phy_info[i].attached.id;
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vdev->bus_id = p->phy_info[i].attached.channel;
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vdev->lun = sdev->lun;
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goto out;
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}
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}
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}
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mutex_unlock(&hd->ioc->sas_topology_mutex);
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printk("No matching SAS device found!!\n");
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kfree(vdev);
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return -ENODEV;
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out:
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mutex_unlock(&hd->ioc->sas_topology_mutex);
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vtarget->ioc_id = vdev->ioc_id;
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vtarget->target_id = vdev->target_id;
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vtarget->bus_id = vdev->bus_id;
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@ -282,6 +304,42 @@ mptsas_slave_alloc(struct scsi_device *sdev)
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return 0;
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}
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static void
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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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/*
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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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* TODO: Issue target reset to flush firmware outstanding commands.
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*/
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mptscsih_slave_destroy(sdev);
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}
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static struct scsi_host_template mptsas_driver_template = {
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.module = THIS_MODULE,
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.proc_name = "mptsas",
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@ -293,7 +351,7 @@ static struct scsi_host_template mptsas_driver_template = {
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.slave_alloc = mptsas_slave_alloc,
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.slave_configure = mptscsih_slave_configure,
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.target_destroy = mptscsih_target_destroy,
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.slave_destroy = mptscsih_slave_destroy,
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.slave_destroy = mptsas_slave_destroy,
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.change_queue_depth = mptscsih_change_queue_depth,
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.eh_abort_handler = mptscsih_abort,
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.eh_device_reset_handler = mptscsih_dev_reset,
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@ -649,8 +707,8 @@ mptsas_sas_device_pg0(MPT_ADAPTER *ioc, struct mptsas_devinfo *device_info,
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device_info->handle = le16_to_cpu(buffer->DevHandle);
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device_info->phy_id = buffer->PhyNum;
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device_info->port_id = buffer->PhysicalPort;
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device_info->target = buffer->TargetID;
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device_info->bus = buffer->Bus;
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device_info->id = buffer->TargetID;
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device_info->channel = buffer->Bus;
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memcpy(&sas_address, &buffer->SASAddress, sizeof(__le64));
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device_info->sas_address = le64_to_cpu(sas_address);
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device_info->device_info =
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@ -858,36 +916,36 @@ 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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struct sas_phy *port;
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struct sas_phy *phy;
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int error;
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port = sas_phy_alloc(dev, index);
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if (!port)
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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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port->port_identifier = phy_info->port_id;
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mptsas_parse_device_info(&port->identify, &phy_info->identify);
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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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/*
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* Set Negotiated link rate.
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*/
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switch (phy_info->negotiated_link_rate) {
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case MPI_SAS_IOUNIT0_RATE_PHY_DISABLED:
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port->negotiated_linkrate = SAS_PHY_DISABLED;
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phy->negotiated_linkrate = SAS_PHY_DISABLED;
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break;
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case MPI_SAS_IOUNIT0_RATE_FAILED_SPEED_NEGOTIATION:
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port->negotiated_linkrate = SAS_LINK_RATE_FAILED;
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phy->negotiated_linkrate = SAS_LINK_RATE_FAILED;
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break;
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case MPI_SAS_IOUNIT0_RATE_1_5:
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port->negotiated_linkrate = SAS_LINK_RATE_1_5_GBPS;
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phy->negotiated_linkrate = SAS_LINK_RATE_1_5_GBPS;
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break;
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case MPI_SAS_IOUNIT0_RATE_3_0:
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port->negotiated_linkrate = SAS_LINK_RATE_3_0_GBPS;
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phy->negotiated_linkrate = SAS_LINK_RATE_3_0_GBPS;
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break;
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case MPI_SAS_IOUNIT0_RATE_SATA_OOB_COMPLETE:
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case MPI_SAS_IOUNIT0_RATE_UNKNOWN:
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default:
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port->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
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phy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
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break;
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}
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@ -896,10 +954,10 @@ static int mptsas_probe_one_phy(struct device *dev,
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*/
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switch (phy_info->hw_link_rate & MPI_SAS_PHY0_PRATE_MAX_RATE_MASK) {
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case MPI_SAS_PHY0_HWRATE_MAX_RATE_1_5:
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port->maximum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
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phy->maximum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
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break;
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case MPI_SAS_PHY0_PRATE_MAX_RATE_3_0:
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port->maximum_linkrate_hw = SAS_LINK_RATE_3_0_GBPS;
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phy->maximum_linkrate_hw = SAS_LINK_RATE_3_0_GBPS;
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break;
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default:
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break;
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@ -911,10 +969,10 @@ static int mptsas_probe_one_phy(struct device *dev,
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switch (phy_info->programmed_link_rate &
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MPI_SAS_PHY0_PRATE_MAX_RATE_MASK) {
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case MPI_SAS_PHY0_PRATE_MAX_RATE_1_5:
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port->maximum_linkrate = SAS_LINK_RATE_1_5_GBPS;
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phy->maximum_linkrate = SAS_LINK_RATE_1_5_GBPS;
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break;
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case MPI_SAS_PHY0_PRATE_MAX_RATE_3_0:
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port->maximum_linkrate = SAS_LINK_RATE_3_0_GBPS;
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phy->maximum_linkrate = SAS_LINK_RATE_3_0_GBPS;
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break;
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default:
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break;
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@ -925,10 +983,10 @@ static int mptsas_probe_one_phy(struct device *dev,
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*/
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switch (phy_info->hw_link_rate & MPI_SAS_PHY0_HWRATE_MIN_RATE_MASK) {
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case MPI_SAS_PHY0_HWRATE_MIN_RATE_1_5:
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port->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
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phy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
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break;
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case MPI_SAS_PHY0_PRATE_MIN_RATE_3_0:
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port->minimum_linkrate_hw = SAS_LINK_RATE_3_0_GBPS;
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phy->minimum_linkrate_hw = SAS_LINK_RATE_3_0_GBPS;
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break;
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default:
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break;
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@ -940,28 +998,29 @@ static int mptsas_probe_one_phy(struct device *dev,
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switch (phy_info->programmed_link_rate &
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MPI_SAS_PHY0_PRATE_MIN_RATE_MASK) {
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case MPI_SAS_PHY0_PRATE_MIN_RATE_1_5:
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port->minimum_linkrate = SAS_LINK_RATE_1_5_GBPS;
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phy->minimum_linkrate = SAS_LINK_RATE_1_5_GBPS;
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break;
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case MPI_SAS_PHY0_PRATE_MIN_RATE_3_0:
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port->minimum_linkrate = SAS_LINK_RATE_3_0_GBPS;
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phy->minimum_linkrate = SAS_LINK_RATE_3_0_GBPS;
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break;
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default:
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break;
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}
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if (local)
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port->local_attached = 1;
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phy->local_attached = 1;
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error = sas_phy_add(port);
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error = sas_phy_add(phy);
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if (error) {
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sas_phy_free(port);
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sas_phy_free(phy);
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return error;
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}
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phy_info->phy = phy;
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if (phy_info->attached.handle) {
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struct sas_rphy *rphy;
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rphy = sas_rphy_alloc(port);
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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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@ -994,7 +1053,10 @@ mptsas_probe_hba_phys(MPT_ADAPTER *ioc, int *index)
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if (error)
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goto out_free_port_info;
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mutex_lock(&ioc->sas_topology_mutex);
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list_add_tail(&port_info->list, &ioc->sas_topology);
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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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mptsas_sas_phy_pg0(ioc, &port_info->phy_info[i],
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(MPI_SAS_PHY_PGAD_FORM_PHY_NUMBER <<
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@ -1047,7 +1109,10 @@ mptsas_probe_expander_phys(MPT_ADAPTER *ioc, u32 *handle, int *index)
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*handle = port_info->handle;
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mutex_lock(&ioc->sas_topology_mutex);
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list_add_tail(&port_info->list, &ioc->sas_topology);
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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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struct device *parent;
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@ -1079,6 +1144,7 @@ mptsas_probe_expander_phys(MPT_ADAPTER *ioc, u32 *handle, int *index)
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* HBA phys.
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*/
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parent = &ioc->sh->shost_gendev;
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mutex_lock(&ioc->sas_topology_mutex);
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list_for_each_entry(p, &ioc->sas_topology, list) {
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for (j = 0; j < p->num_phys; j++) {
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if (port_info->phy_info[i].identify.handle ==
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@ -1086,6 +1152,7 @@ mptsas_probe_expander_phys(MPT_ADAPTER *ioc, u32 *handle, int *index)
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parent = &p->phy_info[j].rphy->dev;
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}
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}
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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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@ -1111,6 +1178,211 @@ mptsas_scan_sas_topology(MPT_ADAPTER *ioc)
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;
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}
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static struct mptsas_phyinfo *
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mptsas_find_phyinfo_by_parent(MPT_ADAPTER *ioc, u16 parent_handle, u8 phy_id)
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{
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struct mptsas_portinfo *port_info;
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struct mptsas_devinfo device_info;
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struct mptsas_phyinfo *phy_info = NULL;
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int i, error;
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/*
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* Retrieve the parent sas_address
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*/
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error = mptsas_sas_device_pg0(ioc, &device_info,
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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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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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* a host, so the code below is safe without additional refcounting.
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*/
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mutex_lock(&ioc->sas_topology_mutex);
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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.sas_address ==
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device_info.sas_address &&
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port_info->phy_info[i].phy_id == phy_id) {
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phy_info = &port_info->phy_info[i];
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break;
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}
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}
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}
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mutex_unlock(&ioc->sas_topology_mutex);
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return phy_info;
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}
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static struct mptsas_phyinfo *
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mptsas_find_phyinfo_by_handle(MPT_ADAPTER *ioc, u16 handle)
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{
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struct mptsas_portinfo *port_info;
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struct mptsas_phyinfo *phy_info = NULL;
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int i;
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/*
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* The phy_info structures are never deallocated during lifetime of
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* a host, so the code below is safe without additional refcounting.
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*/
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mutex_lock(&ioc->sas_topology_mutex);
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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].attached.handle == handle) {
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phy_info = &port_info->phy_info[i];
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break;
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}
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}
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}
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mutex_unlock(&ioc->sas_topology_mutex);
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return phy_info;
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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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struct mptsas_hotplug_event *ev = arg;
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MPT_ADAPTER *ioc = ev->ioc;
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struct mptsas_phyinfo *phy_info;
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struct sas_rphy *rphy;
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char *ds = NULL;
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if (ev->device_info & MPI_SAS_DEVICE_INFO_SSP_TARGET)
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ds = "ssp";
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if (ev->device_info & MPI_SAS_DEVICE_INFO_STP_TARGET)
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ds = "stp";
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if (ev->device_info & MPI_SAS_DEVICE_INFO_SATA_DEVICE)
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ds = "sata";
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switch (ev->event_type) {
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case MPTSAS_DEL_DEVICE:
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printk(MYIOC_s_INFO_FMT
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"removing %s device, channel %d, id %d, phy %d\n",
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||||
ioc->name, ds, ev->channel, ev->id, ev->phy_id);
|
||||
|
||||
phy_info = mptsas_find_phyinfo_by_handle(ioc, ev->handle);
|
||||
if (!phy_info) {
|
||||
printk("mptsas: remove event for non-existant PHY.\n");
|
||||
break;
|
||||
}
|
||||
|
||||
if (phy_info->rphy) {
|
||||
sas_rphy_delete(phy_info->rphy);
|
||||
phy_info->rphy = NULL;
|
||||
}
|
||||
break;
|
||||
case MPTSAS_ADD_DEVICE:
|
||||
printk(MYIOC_s_INFO_FMT
|
||||
"attaching %s device, channel %d, id %d, phy %d\n",
|
||||
ioc->name, ds, ev->channel, ev->id, ev->phy_id);
|
||||
|
||||
phy_info = mptsas_find_phyinfo_by_parent(ioc,
|
||||
ev->parent_handle, ev->phy_id);
|
||||
if (!phy_info) {
|
||||
printk("mptsas: add event for non-existant PHY.\n");
|
||||
break;
|
||||
}
|
||||
|
||||
if (phy_info->rphy) {
|
||||
printk("mptsas: trying to add existing device.\n");
|
||||
break;
|
||||
}
|
||||
|
||||
/* fill attached info */
|
||||
phy_info->attached.handle = ev->handle;
|
||||
phy_info->attached.phy_id = ev->phy_id;
|
||||
phy_info->attached.port_id = phy_info->identify.port_id;
|
||||
phy_info->attached.id = ev->id;
|
||||
phy_info->attached.channel = ev->channel;
|
||||
phy_info->attached.sas_address = ev->sas_address;
|
||||
phy_info->attached.device_info = ev->device_info;
|
||||
|
||||
rphy = sas_rphy_alloc(phy_info->phy);
|
||||
if (!rphy)
|
||||
break; /* non-fatal: an rphy can be added later */
|
||||
|
||||
mptsas_parse_device_info(&rphy->identify, &phy_info->attached);
|
||||
if (sas_rphy_add(rphy)) {
|
||||
sas_rphy_free(rphy);
|
||||
break;
|
||||
}
|
||||
|
||||
phy_info->rphy = rphy;
|
||||
break;
|
||||
}
|
||||
|
||||
kfree(ev);
|
||||
}
|
||||
|
||||
static void
|
||||
mptscsih_send_sas_event(MPT_ADAPTER *ioc,
|
||||
EVENT_DATA_SAS_DEVICE_STATUS_CHANGE *sas_event_data)
|
||||
{
|
||||
struct mptsas_hotplug_event *ev;
|
||||
u32 device_info = le32_to_cpu(sas_event_data->DeviceInfo);
|
||||
__le64 sas_address;
|
||||
|
||||
if ((device_info &
|
||||
(MPI_SAS_DEVICE_INFO_SSP_TARGET |
|
||||
MPI_SAS_DEVICE_INFO_STP_TARGET |
|
||||
MPI_SAS_DEVICE_INFO_SATA_DEVICE )) == 0)
|
||||
return;
|
||||
|
||||
if ((sas_event_data->ReasonCode &
|
||||
(MPI_EVENT_SAS_DEV_STAT_RC_ADDED |
|
||||
MPI_EVENT_SAS_DEV_STAT_RC_NOT_RESPONDING)) == 0)
|
||||
return;
|
||||
|
||||
ev = kmalloc(sizeof(*ev), GFP_ATOMIC);
|
||||
if (!ev) {
|
||||
printk(KERN_WARNING "mptsas: lost hotplug event\n");
|
||||
return;
|
||||
}
|
||||
|
||||
|
||||
INIT_WORK(&ev->work, mptsas_hotplug_work, ev);
|
||||
ev->ioc = ioc;
|
||||
ev->handle = le16_to_cpu(sas_event_data->DevHandle);
|
||||
ev->parent_handle = le16_to_cpu(sas_event_data->ParentDevHandle);
|
||||
ev->channel = sas_event_data->Bus;
|
||||
ev->id = sas_event_data->TargetID;
|
||||
ev->phy_id = sas_event_data->PhyNum;
|
||||
memcpy(&sas_address, &sas_event_data->SASAddress, sizeof(__le64));
|
||||
ev->sas_address = le64_to_cpu(sas_address);
|
||||
ev->device_info = device_info;
|
||||
|
||||
if (sas_event_data->ReasonCode & MPI_EVENT_SAS_DEV_STAT_RC_ADDED)
|
||||
ev->event_type = MPTSAS_ADD_DEVICE;
|
||||
else
|
||||
ev->event_type = MPTSAS_DEL_DEVICE;
|
||||
|
||||
schedule_work(&ev->work);
|
||||
}
|
||||
|
||||
static int
|
||||
mptsas_event_process(MPT_ADAPTER *ioc, EventNotificationReply_t *reply)
|
||||
{
|
||||
u8 event = le32_to_cpu(reply->Event) & 0xFF;
|
||||
|
||||
if (!ioc->sh)
|
||||
return 1;
|
||||
|
||||
switch (event) {
|
||||
case MPI_EVENT_SAS_DEVICE_STATUS_CHANGE:
|
||||
mptscsih_send_sas_event(ioc,
|
||||
(EVENT_DATA_SAS_DEVICE_STATUS_CHANGE *)reply->Data);
|
||||
return 1; /* currently means nothing really */
|
||||
|
||||
default:
|
||||
return mptscsih_event_process(ioc, reply);
|
||||
}
|
||||
}
|
||||
|
||||
static int
|
||||
mptsas_probe(struct pci_dev *pdev, const struct pci_device_id *id)
|
||||
{
|
||||
|
@ -1203,6 +1475,8 @@ mptsas_probe(struct pci_dev *pdev, const struct pci_device_id *id)
|
|||
sh->unique_id = ioc->id;
|
||||
|
||||
INIT_LIST_HEAD(&ioc->sas_topology);
|
||||
mutex_init(&ioc->sas_topology_mutex);
|
||||
|
||||
init_MUTEX(&ioc->sas_mgmt.mutex);
|
||||
init_completion(&ioc->sas_mgmt.done);
|
||||
|
||||
|
@ -1339,10 +1613,12 @@ static void __devexit mptsas_remove(struct pci_dev *pdev)
|
|||
|
||||
sas_remove_host(ioc->sh);
|
||||
|
||||
mutex_lock(&ioc->sas_topology_mutex);
|
||||
list_for_each_entry_safe(p, n, &ioc->sas_topology, list) {
|
||||
list_del(&p->list);
|
||||
kfree(p);
|
||||
}
|
||||
mutex_unlock(&ioc->sas_topology_mutex);
|
||||
|
||||
mptscsih_remove(pdev);
|
||||
}
|
||||
|
@ -1393,7 +1669,7 @@ mptsas_init(void)
|
|||
mpt_register(mptscsih_scandv_complete, MPTSAS_DRIVER);
|
||||
mptsasMgmtCtx = mpt_register(mptsas_mgmt_done, MPTSAS_DRIVER);
|
||||
|
||||
if (mpt_event_register(mptsasDoneCtx, mptscsih_event_process) == 0) {
|
||||
if (mpt_event_register(mptsasDoneCtx, mptsas_event_process) == 0) {
|
||||
devtprintk((KERN_INFO MYNAM
|
||||
": Registered for IOC event notifications\n"));
|
||||
}
|
||||
|
|
Loading…
Reference in a new issue