From 7b5a65b9e649dad9cf9c6d282df4162843070351 Mon Sep 17 00:00:00 2001 From: "Kashyap, Desai" Date: Fri, 29 May 2009 16:38:14 +0530 Subject: [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 Signed-off-by: James Bottomley --- drivers/message/fusion/mptbase.c | 56 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) (limited to 'drivers/message/fusion/mptbase.c') diff --git a/drivers/message/fusion/mptbase.c b/drivers/message/fusion/mptbase.c index a66369218c97..54326e09629c 100644 --- a/drivers/message/fusion/mptbase.c +++ b/drivers/message/fusion/mptbase.c @@ -276,6 +276,56 @@ mpt_get_cb_idx(MPT_DRIVER_CLASS dclass) return 0; } +/** + * 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: -- cgit v1.2.3-70-g09d2