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| author | kashyap.desai@lsi.com <kashyap.desai@lsi.com> | 2011-08-04 13:11:55 +0200 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2011-08-27 16:35:14 +0200 |
| commit | 3850b14e51d32fc0d4297ceb30f3f7bb2c2b4779 (patch) | |
| tree | 4d727543870344af6ea75f99bfb5c7769c4f2328 /drivers/message | |
| parent | [SCSI] libsas: export sas_alloc_task() (diff) | |
| download | linux-3850b14e51d32fc0d4297ceb30f3f7bb2c2b4779.tar.xz linux-3850b14e51d32fc0d4297ceb30f3f7bb2c2b4779.zip | |
[SCSI] mptfusion: Set max sector count module parameter
The max_sector setting is currently hard-coded in the driver to 8192
sectors (4MB transfers). Using new module parameter, if max_sectors is
specified at load time, the default of 8192 will be overridden.
Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/message')
| -rw-r--r-- | drivers/message/fusion/mptsas.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/message/fusion/mptsas.c b/drivers/message/fusion/mptsas.c index 7596aecd5072..73229ff9cafa 100644 --- a/drivers/message/fusion/mptsas.c +++ b/drivers/message/fusion/mptsas.c @@ -92,6 +92,11 @@ static int max_lun = MPTSAS_MAX_LUN; module_param(max_lun, int, 0); MODULE_PARM_DESC(max_lun, " max lun, default=16895 "); +static int mpt_loadtime_max_sectors = 8192; +module_param(mpt_loadtime_max_sectors, int, 0); +MODULE_PARM_DESC(mpt_loadtime_max_sectors, + " Maximum sector define for Host Bus Adaptor.Range 64 to 8192 default=8192"); + static u8 mptsasDoneCtx = MPT_MAX_PROTOCOL_DRIVERS; static u8 mptsasTaskCtx = MPT_MAX_PROTOCOL_DRIVERS; static u8 mptsasInternalCtx = MPT_MAX_PROTOCOL_DRIVERS; /* Used only for internal commands */ @@ -5239,6 +5244,21 @@ mptsas_probe(struct pci_dev *pdev, const struct pci_device_id *id) sh->sg_tablesize = numSGE; } + if (mpt_loadtime_max_sectors) { + if (mpt_loadtime_max_sectors < 64 || + mpt_loadtime_max_sectors > 8192) { + printk(MYIOC_s_INFO_FMT "Invalid value passed for" + "mpt_loadtime_max_sectors %d." + "Range from 64 to 8192\n", ioc->name, + mpt_loadtime_max_sectors); + } + mpt_loadtime_max_sectors &= 0xFFFFFFFE; + dprintk(ioc, printk(MYIOC_s_DEBUG_FMT + "Resetting max sector to %d from %d\n", + ioc->name, mpt_loadtime_max_sectors, sh->max_sectors)); + sh->max_sectors = mpt_loadtime_max_sectors; + } + hd = shost_priv(sh); hd->ioc = ioc; |