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[SCSI] mpt2sas: Added loadtime para for IOMissingDelay and DMD

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Ability to override/set the ReportDeviceMissingDelay and
IODeviceMissingDelay from driver: Add new command line option missing_delay,
this is an array, where the first element is the device missing delay,
and the second element is io missing delay.  The driver will program
sas iounit page 1 with the new setting when the driver loads. This is
programmed to the current and persistent configuration page so this takes
immediately, as will be sticky across host reboots.

Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Kashyap, Desai 2010-11-13 04:32:18 +05:30 committed by James Bottomley
parent dd3741d303
commit 6cb8ef573f
1 changed files with 100 additions and 0 deletions
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100
drivers/scsi/mpt2sas/mpt2sas_base.c
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@ -79,6 +79,10 @@ static int msix_disable = -1;
module_param(msix_disable, int, 0);
MODULE_PARM_DESC(msix_disable, " disable msix routed interrupts (default=0)");
static int missing_delay[2] = {-1, -1};
module_param_array(missing_delay, int, NULL, 0);
MODULE_PARM_DESC(missing_delay, " device missing delay , io missing delay");
/* diag_buffer_enable is bitwise
* bit 0 set = TRACE
* bit 1 set = SNAPSHOT
@ -1822,6 +1826,97 @@ _base_display_ioc_capabilities(struct MPT2SAS_ADAPTER *ioc)
printk(")\n");
}
/**
* _base_update_missing_delay - change the missing delay timers
* @ioc: per adapter object
* @device_missing_delay: amount of time till device is reported missing
* @io_missing_delay: interval IO is returned when there is a missing device
*
* Return nothing.
*
* Passed on the command line, this function will modify the device missing
* delay, as well as the io missing delay. This should be called at driver
* load time.
*/
static void
_base_update_missing_delay(struct MPT2SAS_ADAPTER *ioc,
u16 device_missing_delay, u8 io_missing_delay)
{
u16 dmd, dmd_new, dmd_orignal;
u8 io_missing_delay_original;
u16 sz;
Mpi2SasIOUnitPage1_t *sas_iounit_pg1 = NULL;
Mpi2ConfigReply_t mpi_reply;
u8 num_phys = 0;
u16 ioc_status;
mpt2sas_config_get_number_hba_phys(ioc, &num_phys);
if (!num_phys)
return;
sz = offsetof(Mpi2SasIOUnitPage1_t, PhyData) + (num_phys *
sizeof(Mpi2SasIOUnit1PhyData_t));
sas_iounit_pg1 = kzalloc(sz, GFP_KERNEL);
if (!sas_iounit_pg1) {
printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
ioc->name, __FILE__, __LINE__, __func__);
goto out;
}
if ((mpt2sas_config_get_sas_iounit_pg1(ioc, &mpi_reply,
sas_iounit_pg1, sz))) {
printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
ioc->name, __FILE__, __LINE__, __func__);
goto out;
}
ioc_status = le16_to_cpu(mpi_reply.IOCStatus) &
MPI2_IOCSTATUS_MASK;
if (ioc_status != MPI2_IOCSTATUS_SUCCESS) {
printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
ioc->name, __FILE__, __LINE__, __func__);
goto out;
}
/* device missing delay */
dmd = sas_iounit_pg1->ReportDeviceMissingDelay;
if (dmd & MPI2_SASIOUNIT1_REPORT_MISSING_UNIT_16)
dmd = (dmd & MPI2_SASIOUNIT1_REPORT_MISSING_TIMEOUT_MASK) * 16;
else
dmd = dmd & MPI2_SASIOUNIT1_REPORT_MISSING_TIMEOUT_MASK;
dmd_orignal = dmd;
if (device_missing_delay > 0x7F) {
dmd = (device_missing_delay > 0x7F0) ? 0x7F0 :
device_missing_delay;
dmd = dmd / 16;
dmd |= MPI2_SASIOUNIT1_REPORT_MISSING_UNIT_16;
} else
dmd = device_missing_delay;
sas_iounit_pg1->ReportDeviceMissingDelay = dmd;
/* io missing delay */
io_missing_delay_original = sas_iounit_pg1->IODeviceMissingDelay;
sas_iounit_pg1->IODeviceMissingDelay = io_missing_delay;
if (!mpt2sas_config_set_sas_iounit_pg1(ioc, &mpi_reply, sas_iounit_pg1,
sz)) {
if (dmd & MPI2_SASIOUNIT1_REPORT_MISSING_UNIT_16)
dmd_new = (dmd &
MPI2_SASIOUNIT1_REPORT_MISSING_TIMEOUT_MASK) * 16;
else
dmd_new =
dmd & MPI2_SASIOUNIT1_REPORT_MISSING_TIMEOUT_MASK;
printk(MPT2SAS_INFO_FMT "device_missing_delay: old(%d), "
"new(%d)\n", ioc->name, dmd_orignal, dmd_new);
printk(MPT2SAS_INFO_FMT "ioc_missing_delay: old(%d), "
"new(%d)\n", ioc->name, io_missing_delay_original,
io_missing_delay);
ioc->device_missing_delay = dmd_new;
ioc->io_missing_delay = io_missing_delay;
}
out:
kfree(sas_iounit_pg1);
}
/**
* _base_static_config_pages - static start of day config pages
* @ioc: per adapter object
@ -1859,6 +1954,7 @@ _base_static_config_pages(struct MPT2SAS_ADAPTER *ioc)
MPI2_IOUNITPAGE1_DISABLE_TASK_SET_FULL_HANDLING;
ioc->iounit_pg1.Flags = cpu_to_le32(iounit_pg1_flags);
mpt2sas_config_set_iounit_pg1(ioc, &mpi_reply, &ioc->iounit_pg1);
}
/**
@ -3720,6 +3816,10 @@ mpt2sas_base_attach(struct MPT2SAS_ADAPTER *ioc)
if (r)
goto out_free_resources;
if (missing_delay[0] != -1 && missing_delay[1] != -1)
_base_update_missing_delay(ioc, missing_delay[0],
missing_delay[1]);
mpt2sas_base_start_watchdog(ioc);
return 0;