mptsas.c

linux 内核源代码

/*
 *  linux/drivers/message/fusion/mptsas.c
 *      For use with LSI PCI chip/adapter(s)
 *      running LSI Fusion MPT (Message Passing Technology) firmware.
 *
 *  Copyright (c) 1999-2007 LSI Corporation
 *  (mailto:[e-mail])
 */
/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/*
    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; version 2 of the License.

    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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/
/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/jiffies.h>
#include <linux/workqueue.h>
#include <linux/delay.h>	/* for mdelay */

#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_transport_sas.h>
#include <scsi/scsi_dbg.h>

#include "mptbase.h"
#include "mptscsih.h"
#include "mptsas.h"


#define my_NAME		"Fusion MPT SAS Host driver"
#define my_VERSION	MPT_LINUX_VERSION_COMMON
#define MYNAM		"mptsas"

/*
 * Reserved channel for integrated raid
 */
#define MPTSAS_RAID_CHANNEL	1

MODULE_AUTHOR(MODULEAUTHOR);
MODULE_DESCRIPTION(my_NAME);
MODULE_LICENSE("GPL");
MODULE_VERSION(my_VERSION);

static int mpt_pt_clear;
module_param(mpt_pt_clear, int, 0);
MODULE_PARM_DESC(mpt_pt_clear,
		" Clear persistency table: enable=1  "
		"(default=MPTSCSIH_PT_CLEAR=0)");

/* scsi-mid layer global parmeter is max_report_luns, which is 511 */
#define MPTSAS_MAX_LUN (16895)
static int max_lun = MPTSAS_MAX_LUN;
module_param(max_lun, int, 0);
MODULE_PARM_DESC(max_lun, " max lun, default=16895 ");

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 */
static u8	mptsasMgmtCtx = MPT_MAX_PROTOCOL_DRIVERS;

static void mptsas_hotplug_work(struct work_struct *work);

static void mptsas_print_phy_data(MPT_ADAPTER *ioc,
					MPI_SAS_IO_UNIT0_PHY_DATA *phy_data)
{
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT
	    "---- IO UNIT PAGE 0 ------------\n", ioc->name));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT "Handle=0x%X\n",
	    ioc->name, le16_to_cpu(phy_data->AttachedDeviceHandle)));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT "Controller Handle=0x%X\n",
	    ioc->name, le16_to_cpu(phy_data->ControllerDevHandle)));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT "Port=0x%X\n",
	    ioc->name, phy_data->Port));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT "Port Flags=0x%X\n",
	    ioc->name, phy_data->PortFlags));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT "PHY Flags=0x%X\n",
	    ioc->name, phy_data->PhyFlags));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT "Negotiated Link Rate=0x%X\n",
	    ioc->name, phy_data->NegotiatedLinkRate));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT
	    "Controller PHY Device Info=0x%X\n", ioc->name,
	    le32_to_cpu(phy_data->ControllerPhyDeviceInfo)));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT "DiscoveryStatus=0x%X\n\n",
	    ioc->name, le32_to_cpu(phy_data->DiscoveryStatus)));
}

static void mptsas_print_phy_pg0(MPT_ADAPTER *ioc, SasPhyPage0_t *pg0)
{
	__le64 sas_address;

	memcpy(&sas_address, &pg0->SASAddress, sizeof(__le64));

	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT
	    "---- SAS PHY PAGE 0 ------------\n", ioc->name));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT
	    "Attached Device Handle=0x%X\n", ioc->name,
	    le16_to_cpu(pg0->AttachedDevHandle)));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT "SAS Address=0x%llX\n",
	    ioc->name, (unsigned long long)le64_to_cpu(sas_address)));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT
	    "Attached PHY Identifier=0x%X\n", ioc->name,
	    pg0->AttachedPhyIdentifier));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT "Attached Device Info=0x%X\n",
	    ioc->name, le32_to_cpu(pg0->AttachedDeviceInfo)));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT "Programmed Link Rate=0x%X\n",
	    ioc->name,  pg0->ProgrammedLinkRate));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT "Change Count=0x%X\n",
	    ioc->name, pg0->ChangeCount));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT "PHY Info=0x%X\n\n",
	    ioc->name, le32_to_cpu(pg0->PhyInfo)));
}

static void mptsas_print_phy_pg1(MPT_ADAPTER *ioc, SasPhyPage1_t *pg1)
{
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT
	    "---- SAS PHY PAGE 1 ------------\n", ioc->name));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT "Invalid Dword Count=0x%x\n",
	    ioc->name,  pg1->InvalidDwordCount));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT
	    "Running Disparity Error Count=0x%x\n", ioc->name,
	    pg1->RunningDisparityErrorCount));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT
	    "Loss Dword Synch Count=0x%x\n", ioc->name,
	    pg1->LossDwordSynchCount));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT
	    "PHY Reset Problem Count=0x%x\n\n", ioc->name,
	    pg1->PhyResetProblemCount));
}

static void mptsas_print_device_pg0(MPT_ADAPTER *ioc, SasDevicePage0_t *pg0)
{
	__le64 sas_address;

	memcpy(&sas_address, &pg0->SASAddress, sizeof(__le64));

	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT
	    "---- SAS DEVICE PAGE 0 ---------\n", ioc->name));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT "Handle=0x%X\n",
	    ioc->name, le16_to_cpu(pg0->DevHandle)));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT "Parent Handle=0x%X\n",
	    ioc->name, le16_to_cpu(pg0->ParentDevHandle)));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT "Enclosure Handle=0x%X\n",
	    ioc->name, le16_to_cpu(pg0->EnclosureHandle)));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT "Slot=0x%X\n",
	    ioc->name, le16_to_cpu(pg0->Slot)));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT "SAS Address=0x%llX\n",
	    ioc->name, (unsigned long long)le64_to_cpu(sas_address)));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT "Target ID=0x%X\n",
	    ioc->name, pg0->TargetID));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT "Bus=0x%X\n",
	    ioc->name, pg0->Bus));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT "Parent Phy Num=0x%X\n",
	    ioc->name, pg0->PhyNum));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT "Access Status=0x%X\n",
	    ioc->name, le16_to_cpu(pg0->AccessStatus)));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT "Device Info=0x%X\n",
	    ioc->name, le32_to_cpu(pg0->DeviceInfo)));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT "Flags=0x%X\n",
	    ioc->name, le16_to_cpu(pg0->Flags)));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT "Physical Port=0x%X\n\n",
	    ioc->name, pg0->PhysicalPort));
}

static void mptsas_print_expander_pg1(MPT_ADAPTER *ioc, SasExpanderPage1_t *pg1)
{
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT
	    "---- SAS EXPANDER PAGE 1 ------------\n", ioc->name));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT "Physical Port=0x%X\n",
	    ioc->name, pg1->PhysicalPort));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT "PHY Identifier=0x%X\n",
	    ioc->name, pg1->PhyIdentifier));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT "Negotiated Link Rate=0x%X\n",
	    ioc->name, pg1->NegotiatedLinkRate));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT "Programmed Link Rate=0x%X\n",
	    ioc->name, pg1->ProgrammedLinkRate));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT "Hardware Link Rate=0x%X\n",
	    ioc->name, pg1->HwLinkRate));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT "Owner Device Handle=0x%X\n",
	    ioc->name, le16_to_cpu(pg1->OwnerDevHandle)));
	dsasprintk(ioc, printk(MYIOC_s_DEBUG_FMT
	    "Attached Device Handle=0x%X\n\n", ioc->name,
	    le16_to_cpu(pg1->AttachedDevHandle)));
}

static inline MPT_ADAPTER *phy_to_ioc(struct sas_phy *phy)
{
	struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
	return ((MPT_SCSI_HOST *)shost->hostdata)->ioc;
}

static inline MPT_ADAPTER *rphy_to_ioc(struct sas_rphy *rphy)
{
	struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
	return ((MPT_SCSI_HOST *)shost->hostdata)->ioc;
}

/*
 * mptsas_find_portinfo_by_handle
 *
 * This function should be called with the sas_topology_mutex already held
 */
static struct mptsas_portinfo *
mptsas_find_portinfo_by_handle(MPT_ADAPTER *ioc, u16 handle)
{
	struct mptsas_portinfo *port_info, *rc=NULL;
	int i;

	list_for_each_entry(port_info, &ioc->sas_topology, list)
		for (i = 0; i < port_info->num_phys; i++)
			if (port_info->phy_info[i].identify.handle == handle) {
				rc = port_info;
				goto out;
			}
 out:
	return rc;
}

/*
 * Returns true if there is a scsi end device
 */
static inline int
mptsas_is_end_device(struct mptsas_devinfo * attached)
{
	if ((attached->sas_address) &&
	    (attached->device_info &
	    MPI_SAS_DEVICE_INFO_END_DEVICE) &&
	    ((attached->device_info &
	    MPI_SAS_DEVICE_INFO_SSP_TARGET) |
	    (attached->device_info &
	    MPI_SAS_DEVICE_INFO_STP_TARGET) |
	    (attached->device_info &
	    MPI_SAS_DEVICE_INFO_SATA_DEVICE)))
		return 1;
	else
		return 0;
}

/* no mutex */
static void
mptsas_port_delete(MPT_ADAPTER *ioc, struct mptsas_portinfo_details * port_details)
{
	struct mptsas_portinfo *port_info;
	struct mptsas_phyinfo *phy_info;
	u8	i;

	if (!port_details)
		return;

	port_info = port_details->port_info;
	phy_info = port_info->phy_info;

	dsaswideprintk(ioc, printk(MYIOC_s_DEBUG_FMT "%s: [%p]: num_phys=%02d "
	    "bitmask=0x%016llX\n", ioc->name, __FUNCTION__, port_details,
	    port_details->num_phys, (unsigned long long)
	    port_details->phy_bitmask));

	for (i = 0; i < port_info->num_phys; i++, phy_info++) {
		if(phy_info->port_details != port_details)
			continue;
		memset(&phy_info->attached, 0, sizeof(struct mptsas_devinfo));
		phy_info->port_details = NULL;
	}
	kfree(port_details);
}

static inline struct sas_rphy *
mptsas_get_rphy(struct mptsas_phyinfo *phy_info)
{
	if (phy_info->port_details)
		return phy_info->port_details->rphy;
	else
		return NULL;
}

static inline void
mptsas_set_rphy(MPT_ADAPTER *ioc, struct mptsas_phyinfo *phy_info, struct sas_rphy *rphy)
{
	if (phy_info->port_details) {
		phy_info->port_details->rphy = rphy;
		dsaswideprintk(ioc, printk(MYIOC_s_DEBUG_FMT "sas_rphy_add: rphy=%p\n",
		    ioc->name, rphy));
	}

	if (rphy) {
		dsaswideprintk(ioc, dev_printk(KERN_DEBUG,
		    &rphy->dev, MYIOC_s_FMT "add:", ioc->name));
		dsaswideprintk(ioc, printk(MYIOC_s_DEBUG_FMT "rphy=%p release=%p\n",
		    ioc->name, rphy, rphy->dev.release));
	}
}

static inline struct sas_port *
mptsas_get_port(struct mptsas_phyinfo *phy_info)
{
	if (phy_info->port_details)
		return phy_info->port_details->port;
	else
		return NULL;
}

static inline void
mptsas_set_port(MPT_ADAPTER *ioc, struct mptsas_phyinfo *phy_info, struct sas_port *port)
{
	if (phy_info->port_details)
		phy_info->port_details->port = port;

	if (port) {
		dsaswideprintk(ioc, dev_printk(KERN_DEBUG,
		    &port->dev, MYIOC_s_FMT "add:", ioc->name));
		dsaswideprintk(ioc, printk(MYIOC_s_DEBUG_FMT "port=%p release=%p\n",
		    ioc->name, port, port->dev.release));
	}
}

static inline struct scsi_target *
mptsas_get_starget(struct mptsas_phyinfo *phy_info)
{
	if (phy_info->port_details)
		return phy_info->port_details->starget;
	else
		return NULL;
}

static inline void
mptsas_set_starget(struct mptsas_phyinfo *phy_info, struct scsi_target *
starget)
{
	if (phy_info->port_details)
		phy_info->port_details->starget = starget;
}


/*
 * mptsas_setup_wide_ports
 *
 * Updates for new and existing narrow/wide port configuration
 * in the sas_topology
 */
static void
mptsas_setup_wide_ports(MPT_ADAPTER *ioc, struct mptsas_portinfo *port_info)
{
	struct mptsas_portinfo_details * port_details;
	struct mptsas_phyinfo *phy_info, *phy_info_cmp;
	u64	sas_address;
	int	i, j;

	mutex_lock(&ioc->sas_topology_mutex);

	phy_info = port_info->phy_info;
	for (i = 0 ; i < port_info->num_phys ; i++, phy_info++) {
		if (phy_info->attached.handle)
			continue;
		port_details = phy_info->port_details;
		if (!port_details)
			continue;
		if (port_details->num_phys < 2)
			continue;
		/*
		 * Removing a phy from a port, letting the last
		 * phy be removed by firmware events.
		 */
		dsaswideprintk(ioc, printk(MYIOC_s_DEBUG_FMT
		    "%s: [%p]: deleting phy = %d\n",
		    ioc->name, __FUNCTION__, port_details, i));
		port_details->num_phys--;
		port_details->phy_bitmask &= ~ (1 << phy_info->phy_id);
		memset(&phy_info->attached, 0, sizeof(struct mptsas_devinfo));
		sas_port_delete_phy(port_details->port, phy_info->phy);
		phy_info->port_details = NULL;
	}

	/*
	 * Populate and refresh the tree
	 */
	phy_info = port_info->phy_info;
	for (i = 0 ; i < port_info->num_phys ; i++, phy_info++) {
		sas_address = phy_info->attached.sas_address;
		dsaswideprintk(ioc, printk(MYIOC_s_DEBUG_FMT "phy_id=%d sas_address=0x%018llX\n",
		    ioc->name, i, (unsigned long long)sas_address));
		if (!sas_address)
			continue;
		port_details = phy_info->port_details;
		/*
		 * Forming a port
		 */
		if (!port_details) {
			port_details = kzalloc(sizeof(*port_details),
				GFP_KERNEL);
			if (!port_details)
				goto out;
			port_details->num_phys = 1;
			port_details->port_info = port_info;
			if (phy_info->phy_id < 64 )
				port_details->phy_bitmask |=
				    (1 << phy_info->phy_id);
			phy_info->sas_port_add_phy=1;
			dsaswideprintk(ioc, printk(MYIOC_s_DEBUG_FMT "\t\tForming port\n\t\t"
			    "phy_id=%d sas_address=0x%018llX\n",
			    ioc->name, i, (unsigned long long)sas_address));
			phy_info->port_details = port_details;
		}

		if (i == port_info->num_phys - 1)
			continue;
		phy_info_cmp = &port_info->phy_info[i + 1];
		for (j = i + 1 ; j < port_info->num_phys ; j++,
		    phy_info_cmp++) {
			if (!phy_info_cmp->attached.sas_address)
				continue;
			if (sas_address != phy_info_cmp->attached.sas_address)
				continue;
			if (phy_info_cmp->port_details == port_details )
				continue;
			dsaswideprintk(ioc, printk(MYIOC_s_DEBUG_FMT
			    "\t\tphy_id=%d sas_address=0x%018llX\n",
			    ioc->name, j, (unsigned long long)
			    phy_info_cmp->attached.sas_address));
			if (phy_info_cmp->port_details) {
				port_details->rphy =
				    mptsas_get_rphy(phy_info_cmp);
				port_details->port =
				    mptsas_get_port(phy_info_cmp);
				port_details->starget =
				    mptsas_get_starget(phy_info_cmp);
				port_details->num_phys =
					phy_info_cmp->port_details->num_phys;
				if (!phy_info_cmp->port_details->num_phys)
					kfree(phy_info_cmp->port_details);
			} else
				phy_info_cmp->sas_port_add_phy=1;
			/*
			 * Adding a phy to a port
			 */
			phy_info_cmp->port_details = port_details;
			if (phy_info_cmp->phy_id < 64 )
				port_details->phy_bitmask |=
				(1 << phy_info_cmp->phy_id);
			port_details->num_phys++;
		}
	}

 out:

	for (i = 0; i < port_info->num_phys; i++) {
		port_details = port_info->phy_info[i].port_details;
		if (!port_details)
			continue;
		dsaswideprintk(ioc, printk(MYIOC_s_DEBUG_FMT
		    "%s: [%p]: phy_id=%02d num_phys=%02d "