[SCSI] mptfc: set fibre channel fw target missing timers to one second

The fibre channel firmware provides a timer which is similar in purpose
to the fibre channel transport's device loss timer.  The effect of this
timer is to extend the total time that a target will be missing beyond
the value associated with the transport's timer.  This patch changes
the firmware timer to a default of one second which significantly reduces
the lag between when a target goes missing and the notification of the
fibre channel transport.

Signed-off-by: Michael Reed <mdr@sgi.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 162 insertions, 9 deletions

diff --git a/drivers/message/fusion/mptfc.c b/drivers/message/fusion/mptfc.c
index e518bc97f8ce..918aca0146ff 100644
--- a/drivers/message/fusion/mptfc.c
+++ b/drivers/message/fusion/mptfc.c
@@ -169,13 +169,6 @@ static struct fc_function_template mptfc_transport_functions = {
 
 };
 
-/* FIXME! values controlling firmware RESCAN event
- * need to be set low to allow dev_loss_tmo to
- * work as expected.  Currently, firmware doesn't
- * notify driver of RESCAN event until some number
- * of seconds elapse.  This value can be set via
- * lsiutil.
- */
 static void
 mptfc_set_rport_loss_tmo(struct fc_rport *rport, uint32_t timeout)
 {
@@ -700,6 +693,153 @@ mptfc_GetFcPortPage0(MPT_ADAPTER *ioc, int portnum)
         return rc;
 }
 
+static int
+mptfc_WriteFcPortPage1(MPT_ADAPTER *ioc, int portnum)
+{
+        ConfigPageHeader_t       hdr;
+        CONFIGPARMS              cfg;
+        int                      rc;
+
+        if (portnum > 1)
+                return -EINVAL;
+
+        if (!(ioc->fc_data.fc_port_page1[portnum].data))
+                return -EINVAL;
+
+        /* get fcport page 1 header */
+        hdr.PageVersion = 0;
+        hdr.PageLength = 0;
+        hdr.PageNumber = 1;
+        hdr.PageType = MPI_CONFIG_PAGETYPE_FC_PORT;
+        cfg.cfghdr.hdr = &hdr;
+        cfg.physAddr = -1;
+        cfg.action = MPI_CONFIG_ACTION_PAGE_HEADER;
+        cfg.dir = 0;
+        cfg.pageAddr = portnum;
+        cfg.timeout = 0;
+
+        if ((rc = mpt_config(ioc, &cfg)) != 0)
+                return rc;
+
+        if (hdr.PageLength == 0)
+                return -ENODEV;
+
+        if (hdr.PageLength*4 != ioc->fc_data.fc_port_page1[portnum].pg_sz)
+                return -EINVAL;
+
+        cfg.physAddr = ioc->fc_data.fc_port_page1[portnum].dma;
+        cfg.action = MPI_CONFIG_ACTION_PAGE_WRITE_CURRENT;
+        cfg.dir = 1;
+
+        rc = mpt_config(ioc, &cfg);
+
+        return rc;
+}
+
+static int
+mptfc_GetFcPortPage1(MPT_ADAPTER *ioc, int portnum)
+{
+        ConfigPageHeader_t       hdr;
+        CONFIGPARMS              cfg;
+        FCPortPage1_t           *page1_alloc;
+        dma_addr_t               page1_dma;
+        int                      data_sz;
+        int                      rc;
+
+        if (portnum > 1)
+                return -EINVAL;
+
+        /* get fcport page 1 header */
+        hdr.PageVersion = 0;
+        hdr.PageLength = 0;
+        hdr.PageNumber = 1;
+        hdr.PageType = MPI_CONFIG_PAGETYPE_FC_PORT;
+        cfg.cfghdr.hdr = &hdr;
+        cfg.physAddr = -1;
+        cfg.action = MPI_CONFIG_ACTION_PAGE_HEADER;
+        cfg.dir = 0;
+        cfg.pageAddr = portnum;
+        cfg.timeout = 0;
+
+        if ((rc = mpt_config(ioc, &cfg)) != 0)
+                return rc;
+
+        if (hdr.PageLength == 0)
+                return -ENODEV;
+
+start_over:
+
+        if (ioc->fc_data.fc_port_page1[portnum].data == NULL) {
+                data_sz = hdr.PageLength * 4;
+                if (data_sz < sizeof(FCPortPage1_t))
+                        data_sz = sizeof(FCPortPage1_t);
+
+                page1_alloc = (FCPortPage1_t *) pci_alloc_consistent(ioc->pcidev,
+                                                data_sz,
+                                                &page1_dma);
+                if (!page1_alloc)
+                        return -ENOMEM;
+        }
+        else {
+                page1_alloc = ioc->fc_data.fc_port_page1[portnum].data;
+                page1_dma = ioc->fc_data.fc_port_page1[portnum].dma;
+                data_sz = ioc->fc_data.fc_port_page1[portnum].pg_sz;
+                if (hdr.PageLength * 4 > data_sz) {
+                        ioc->fc_data.fc_port_page1[portnum].data = NULL;
+                        pci_free_consistent(ioc->pcidev, data_sz, (u8 *)
+                                page1_alloc, page1_dma);
+                        goto start_over;
+                }
+        }
+
+        memset(page1_alloc,0,data_sz);
+
+        cfg.physAddr = page1_dma;
+        cfg.action = MPI_CONFIG_ACTION_PAGE_READ_CURRENT;
+
+        if ((rc = mpt_config(ioc, &cfg)) == 0) {
+                ioc->fc_data.fc_port_page1[portnum].data = page1_alloc;
+                ioc->fc_data.fc_port_page1[portnum].pg_sz = data_sz;
+                ioc->fc_data.fc_port_page1[portnum].dma = page1_dma;
+        }
+        else {
+                ioc->fc_data.fc_port_page1[portnum].data = NULL;
+                pci_free_consistent(ioc->pcidev, data_sz, (u8 *)
+                        page1_alloc, page1_dma);
+        }
+
+        return rc;
+}
+
+static void
+mptfc_SetFcPortPage1_defaults(MPT_ADAPTER *ioc)
+{
+        int             ii;
+        FCPortPage1_t   *pp1;
+
+        #define MPTFC_FW_DEVICE_TIMEOUT (1)
+        #define MPTFC_FW_IO_PEND_TIMEOUT (1)
+        #define ON_FLAGS  (MPI_FCPORTPAGE1_FLAGS_IMMEDIATE_ERROR_REPLY)
+        #define OFF_FLAGS (MPI_FCPORTPAGE1_FLAGS_VERBOSE_RESCAN_EVENTS)
+
+        for (ii=0; ii<ioc->facts.NumberOfPorts; ii++) {
+                if (mptfc_GetFcPortPage1(ioc, ii) != 0)
+                        continue;
+                pp1 = ioc->fc_data.fc_port_page1[ii].data;
+                if ((pp1->InitiatorDeviceTimeout == MPTFC_FW_DEVICE_TIMEOUT)
+                 && (pp1->InitiatorIoPendTimeout == MPTFC_FW_IO_PEND_TIMEOUT)
+                 && ((pp1->Flags & ON_FLAGS) == ON_FLAGS)
+                 && ((pp1->Flags & OFF_FLAGS) == 0))
+                        continue;
+                pp1->InitiatorDeviceTimeout = MPTFC_FW_DEVICE_TIMEOUT;
+                pp1->InitiatorIoPendTimeout = MPTFC_FW_IO_PEND_TIMEOUT;
+                pp1->Flags &= ~OFF_FLAGS;
+                pp1->Flags |= ON_FLAGS;
+                mptfc_WriteFcPortPage1(ioc, ii);
+        }
+}
+
+
 static void
 mptfc_init_host_attr(MPT_ADAPTER *ioc,int portnum)
 {
@@ -1000,6 +1140,7 @@ mptfc_probe(struct pci_dev *pdev, const struct pci_device_id *id)
         for (ii=0; ii < ioc->facts.NumberOfPorts; ii++) {
                 (void) mptfc_GetFcPortPage0(ioc, ii);
         }
+        mptfc_SetFcPortPage1_defaults(ioc);
 
         /*
          * scan for rports -
@@ -1086,6 +1227,7 @@ mptfc_ioc_reset(MPT_ADAPTER *ioc, int reset_phase)
         }
 
         else {  /* MPT_IOC_POST_RESET */
+                mptfc_SetFcPortPage1_defaults(ioc);
                 spin_lock_irqsave(&ioc->fc_rescan_work_lock, flags);
                 if (ioc->fc_rescan_work_q) {
                         if (ioc->fc_rescan_work_count++ == 0) {
@@ -1112,8 +1254,8 @@ mptfc_init(void)
 
         show_mptmod_ver(my_NAME, my_VERSION);
 
-        /* sanity check module parameter */
-        if (mptfc_dev_loss_tmo == 0)
+        /* sanity check module parameters */
+        if (mptfc_dev_loss_tmo <= 0)
                 mptfc_dev_loss_tmo = MPTFC_DEV_LOSS_TMO;
 
         mptfc_transport_template =
@@ -1156,6 +1298,7 @@ mptfc_remove(struct pci_dev *pdev)
         struct mptfc_rport_info *p, *n;
         struct workqueue_struct *work_q;
         unsigned long           flags;
+        int                     ii;
 
         /* destroy workqueue */
         if ((work_q=ioc->fc_rescan_work_q)) {
@@ -1172,6 +1315,16 @@ mptfc_remove(struct pci_dev *pdev)
                 kfree(p);
         }
 
+        for (ii=0; ii<ioc->facts.NumberOfPorts; ii++) {
+                if (ioc->fc_data.fc_port_page1[ii].data) {
+                        pci_free_consistent(ioc->pcidev,
+                                ioc->fc_data.fc_port_page1[ii].pg_sz,
+                                (u8 *) ioc->fc_data.fc_port_page1[ii].data,
+                                ioc->fc_data.fc_port_page1[ii].dma);
+                        ioc->fc_data.fc_port_page1[ii].data = NULL;
+                }
+        }
+
         mptscsih_remove(pdev);
 }