path: root/drivers/scsi/mpt2sas/mpt2sas_config.c

/*
 * This module provides common API for accessing firmware configuration pages
 *
 * This code is based on drivers/scsi/mpt2sas/mpt2_base.c
 * Copyright (C) 2007-2008  LSI Corporation
 *  (mailto:DL-MPTFusionLinux@lsi.com)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * NO WARRANTY
 * THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
 * CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
 * LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
 * solely responsible for determining the appropriateness of using and
 * distributing the Program and assumes all risks associated with its
 * exercise of rights under this Agreement, including but not limited to
 * the risks and costs of program errors, damage to or loss of data,
 * programs or equipment, and unavailability or interruption of operations.

 * DISCLAIMER OF LIABILITY
 * NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
 * USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
 * HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES

 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 */

#include <linux/version.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/blkdev.h>
#include <linux/sched.h>
#include <linux/workqueue.h>
#include <linux/delay.h>
#include <linux/pci.h>

#include "mpt2sas_base.h"

/* local definitions */

/* Timeout for config page request (in seconds) */
#define MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT 15

/* Common sgl flags for READING a config page. */
#define MPT2_CONFIG_COMMON_SGLFLAGS ((MPI2_SGE_FLAGS_SIMPLE_ELEMENT | \
    MPI2_SGE_FLAGS_LAST_ELEMENT | MPI2_SGE_FLAGS_END_OF_BUFFER \
    | MPI2_SGE_FLAGS_END_OF_LIST) << MPI2_SGE_FLAGS_SHIFT)

/* Common sgl flags for WRITING a config page. */
#define MPT2_CONFIG_COMMON_WRITE_SGLFLAGS ((MPI2_SGE_FLAGS_SIMPLE_ELEMENT | \
    MPI2_SGE_FLAGS_LAST_ELEMENT | MPI2_SGE_FLAGS_END_OF_BUFFER \
    | MPI2_SGE_FLAGS_END_OF_LIST | MPI2_SGE_FLAGS_HOST_TO_IOC) \
    << MPI2_SGE_FLAGS_SHIFT)

/**
 * struct config_request - obtain dma memory via routine
 * @sz: size
 * @page: virt pointer
 * @page_dma: phys pointer
 *
 */
struct config_request{
	u16			sz;
	void			*page;
	dma_addr_t		page_dma;
};

#ifdef CONFIG_SCSI_MPT2SAS_LOGGING
/**
 * _config_display_some_debug - debug routine
 * @ioc: per adapter object
 * @smid: system request message index
 * @calling_function_name: string pass from calling function
 * @mpi_reply: reply message frame
 * Context: none.
 *
 * Function for displaying debug info helpfull when debugging issues
 * in this module.
 */
static void
_config_display_some_debug(struct MPT2SAS_ADAPTER *ioc, u16 smid,
    char *calling_function_name, MPI2DefaultReply_t *mpi_reply)
{
	Mpi2ConfigRequest_t *mpi_request;
	char *desc = NULL;

	if (!(ioc->logging_level & MPT_DEBUG_CONFIG))
		return;

	mpi_request = mpt2sas_base_get_msg_frame(ioc, smid);
	sw