Commit 6cb8ef57 authored by Kashyap, Desai's avatar Kashyap, Desai Committed by James Bottomley
Browse files

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



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: default avatarKashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@suse.de>
parent dd3741d3

drivers/scsi/mpt2sas/mpt2sas_base.c

+100 −0
Original line number Diff line number Diff line
@@ -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;