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authorKashyap, Desai <kashyap.desai@lsi.com>2009-05-29 16:38:14 +0530
committerJames Bottomley <James.Bottomley@HansenPartnership.com>2009-06-09 17:21:49 -0500
commit7b5a65b9e649dad9cf9c6d282df4162843070351 (patch)
tree440645a0fd7d465e10214a4372a0d7a5a15901c3 /drivers/message/fusion/mptbase.c
parent14d0f0b063f5363984dd305a792854f9c23e9e97 (diff)
[SCSI] mpt fusion: Added support for MPT discovery completion check
sas_discovery_quiesce_io flag is used to control IO start/resume functionality. IO will be stoped while doing discovery of topology. Once discovery is completed It will resume IO. Resending patch including James review. Signed-off-by: Kashyap Desai <kadesai@lsi.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers/message/fusion/mptbase.c')
-rw-r--r--drivers/message/fusion/mptbase.c56
1 files changed, 56 insertions, 0 deletions
diff --git a/drivers/message/fusion/mptbase.c b/drivers/message/fusion/mptbase.c
index a66369218c9..54326e09629 100644
--- a/drivers/message/fusion/mptbase.c
+++ b/drivers/message/fusion/mptbase.c
@@ -277,6 +277,56 @@ mpt_get_cb_idx(MPT_DRIVER_CLASS dclass)
}
/**
+ * mpt_is_discovery_complete - determine if discovery has completed
+ * @ioc: per adatper instance
+ *
+ * Returns 1 when discovery completed, else zero.
+ */
+static int
+mpt_is_discovery_complete(MPT_ADAPTER *ioc)
+{
+ ConfigExtendedPageHeader_t hdr;
+ CONFIGPARMS cfg;
+ SasIOUnitPage0_t *buffer;
+ dma_addr_t dma_handle;
+ int rc = 0;
+
+ memset(&hdr, 0, sizeof(ConfigExtendedPageHeader_t));
+ memset(&cfg, 0, sizeof(CONFIGPARMS));
+ hdr.PageVersion = MPI_SASIOUNITPAGE0_PAGEVERSION;
+ hdr.PageType = MPI_CONFIG_PAGETYPE_EXTENDED;
+ hdr.ExtPageType = MPI_CONFIG_EXTPAGETYPE_SAS_IO_UNIT;
+ cfg.cfghdr.ehdr = &hdr;
+ cfg.action = MPI_CONFIG_ACTION_PAGE_HEADER;
+
+ if ((mpt_config(ioc, &cfg)))
+ goto out;
+ if (!hdr.ExtPageLength)
+ goto out;
+
+ buffer = pci_alloc_consistent(ioc->pcidev, hdr.ExtPageLength * 4,
+ &dma_handle);
+ if (!buffer)
+ goto out;
+
+ cfg.physAddr = dma_handle;
+ cfg.action = MPI_CONFIG_ACTION_PAGE_READ_CURRENT;
+
+ if ((mpt_config(ioc, &cfg)))
+ goto out_free_consistent;
+
+ if (!(buffer->PhyData[0].PortFlags &
+ MPI_SAS_IOUNIT0_PORT_FLAGS_DISCOVERY_IN_PROGRESS))
+ rc = 1;
+
+ out_free_consistent:
+ pci_free_consistent(ioc->pcidev, hdr.ExtPageLength * 4,
+ buffer, dma_handle);
+ out:
+ return rc;
+}
+
+/**
* mpt_fault_reset_work - work performed on workq after ioc fault
* @work: input argument, used to derive ioc
*
@@ -307,6 +357,12 @@ mpt_fault_reset_work(struct work_struct *work)
printk(MYIOC_s_WARN_FMT "IOC is in FAULT state after "
"reset (%04xh)\n", ioc->name, ioc_raw_state &
MPI_DOORBELL_DATA_MASK);
+ } else if (ioc->bus_type == SAS && ioc->sas_discovery_quiesce_io) {
+ if ((mpt_is_discovery_complete(ioc))) {
+ devtprintk(ioc, printk(MYIOC_s_DEBUG_FMT "clearing "
+ "discovery_quiesce_io flag\n", ioc->name));
+ ioc->sas_discovery_quiesce_io = 0;
+ }
}
out: