300 lines
9.8 KiB
C
300 lines
9.8 KiB
C
/*
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* Scsi Host Layer for MPT (Message Passing Technology) based controllers
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*
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* Copyright (C) 2012-2014 LSI Corporation
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* Copyright (C) 2013-2015 Avago Technologies
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* (mailto: MPT-FusionLinux.pdl@avagotech.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* NO WARRANTY
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* THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
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* CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
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* LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
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* solely responsible for determining the appropriateness of using and
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* distributing the Program and assumes all risks associated with its
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* exercise of rights under this Agreement, including but not limited to
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* the risks and costs of program errors, damage to or loss of data,
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* programs or equipment, and unavailability or interruption of operations.
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* DISCLAIMER OF LIABILITY
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* NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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* USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
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* HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
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* You should have received a copy of the GNU General Public License
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* along with this program.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/types.h>
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#include <asm/unaligned.h>
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#include "mpt3sas_base.h"
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/**
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* _warpdrive_disable_ddio - Disable direct I/O for all the volumes
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* @ioc: per adapter object
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*/
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static void
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_warpdrive_disable_ddio(struct MPT3SAS_ADAPTER *ioc)
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{
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Mpi2RaidVolPage1_t vol_pg1;
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Mpi2ConfigReply_t mpi_reply;
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struct _raid_device *raid_device;
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u16 handle;
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u16 ioc_status;
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unsigned long flags;
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handle = 0xFFFF;
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while (!(mpt3sas_config_get_raid_volume_pg1(ioc, &mpi_reply,
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&vol_pg1, MPI2_RAID_VOLUME_PGAD_FORM_GET_NEXT_HANDLE, handle))) {
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ioc_status = le16_to_cpu(mpi_reply.IOCStatus) &
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MPI2_IOCSTATUS_MASK;
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if (ioc_status == MPI2_IOCSTATUS_CONFIG_INVALID_PAGE)
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break;
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handle = le16_to_cpu(vol_pg1.DevHandle);
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spin_lock_irqsave(&ioc->raid_device_lock, flags);
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raid_device = mpt3sas_raid_device_find_by_handle(ioc, handle);
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if (raid_device)
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raid_device->direct_io_enabled = 0;
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spin_unlock_irqrestore(&ioc->raid_device_lock, flags);
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}
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return;
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}
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/**
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* mpt3sas_get_num_volumes - Get number of volumes in the ioc
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* @ioc: per adapter object
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*/
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u8
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mpt3sas_get_num_volumes(struct MPT3SAS_ADAPTER *ioc)
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{
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Mpi2RaidVolPage1_t vol_pg1;
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Mpi2ConfigReply_t mpi_reply;
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u16 handle;
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u8 vol_cnt = 0;
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u16 ioc_status;
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handle = 0xFFFF;
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while (!(mpt3sas_config_get_raid_volume_pg1(ioc, &mpi_reply,
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&vol_pg1, MPI2_RAID_VOLUME_PGAD_FORM_GET_NEXT_HANDLE, handle))) {
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ioc_status = le16_to_cpu(mpi_reply.IOCStatus) &
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MPI2_IOCSTATUS_MASK;
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if (ioc_status == MPI2_IOCSTATUS_CONFIG_INVALID_PAGE)
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break;
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vol_cnt++;
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handle = le16_to_cpu(vol_pg1.DevHandle);
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}
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return vol_cnt;
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}
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/**
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* mpt3sas_init_warpdrive_properties - Set properties for warpdrive direct I/O.
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* @ioc: per adapter object
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* @raid_device: the raid_device object
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*/
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void
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mpt3sas_init_warpdrive_properties(struct MPT3SAS_ADAPTER *ioc,
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struct _raid_device *raid_device)
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{
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Mpi2RaidVolPage0_t *vol_pg0;
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Mpi2RaidPhysDiskPage0_t pd_pg0;
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Mpi2ConfigReply_t mpi_reply;
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u16 sz;
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u8 num_pds, count;
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unsigned long stripe_sz, block_sz;
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u8 stripe_exp, block_exp;
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u64 dev_max_lba;
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if (!ioc->is_warpdrive)
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return;
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if (ioc->mfg_pg10_hide_flag == MFG_PAGE10_EXPOSE_ALL_DISKS) {
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ioc_info(ioc, "WarpDrive : Direct IO is disabled globally as drives are exposed\n");
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return;
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}
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if (mpt3sas_get_num_volumes(ioc) > 1) {
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_warpdrive_disable_ddio(ioc);
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ioc_info(ioc, "WarpDrive : Direct IO is disabled globally as number of drives > 1\n");
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return;
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}
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if ((mpt3sas_config_get_number_pds(ioc, raid_device->handle,
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&num_pds)) || !num_pds) {
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ioc_info(ioc, "WarpDrive : Direct IO is disabled Failure in computing number of drives\n");
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return;
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}
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sz = offsetof(Mpi2RaidVolPage0_t, PhysDisk) + (num_pds *
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sizeof(Mpi2RaidVol0PhysDisk_t));
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vol_pg0 = kzalloc(sz, GFP_KERNEL);
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if (!vol_pg0) {
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ioc_info(ioc, "WarpDrive : Direct IO is disabled Memory allocation failure for RVPG0\n");
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return;
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}
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if ((mpt3sas_config_get_raid_volume_pg0(ioc, &mpi_reply, vol_pg0,
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MPI2_RAID_VOLUME_PGAD_FORM_HANDLE, raid_device->handle, sz))) {
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ioc_info(ioc, "WarpDrive : Direct IO is disabled Failure in retrieving RVPG0\n");
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kfree(vol_pg0);
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return;
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}
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/*
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* WARPDRIVE:If number of physical disks in a volume exceeds the max pds
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* assumed for WARPDRIVE, disable direct I/O
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*/
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if (num_pds > MPT_MAX_WARPDRIVE_PDS) {
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ioc_warn(ioc, "WarpDrive : Direct IO is disabled for the drive with handle(0x%04x): num_mem=%d, max_mem_allowed=%d\n",
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raid_device->handle, num_pds, MPT_MAX_WARPDRIVE_PDS);
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kfree(vol_pg0);
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return;
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}
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for (count = 0; count < num_pds; count++) {
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if (mpt3sas_config_get_phys_disk_pg0(ioc, &mpi_reply,
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&pd_pg0, MPI2_PHYSDISK_PGAD_FORM_PHYSDISKNUM,
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vol_pg0->PhysDisk[count].PhysDiskNum) ||
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le16_to_cpu(pd_pg0.DevHandle) ==
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MPT3SAS_INVALID_DEVICE_HANDLE) {
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ioc_info(ioc, "WarpDrive : Direct IO is disabled for the drive with handle(0x%04x) member handle retrieval failed for member number=%d\n",
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raid_device->handle,
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vol_pg0->PhysDisk[count].PhysDiskNum);
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goto out_error;
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}
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/* Disable direct I/O if member drive lba exceeds 4 bytes */
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dev_max_lba = le64_to_cpu(pd_pg0.DeviceMaxLBA);
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if (dev_max_lba >> 32) {
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ioc_info(ioc, "WarpDrive : Direct IO is disabled for the drive with handle(0x%04x) member handle (0x%04x) unsupported max lba 0x%016llx\n",
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raid_device->handle,
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le16_to_cpu(pd_pg0.DevHandle),
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(u64)dev_max_lba);
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goto out_error;
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}
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raid_device->pd_handle[count] = le16_to_cpu(pd_pg0.DevHandle);
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}
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/*
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* Assumption for WD: Direct I/O is not supported if the volume is
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* not RAID0
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*/
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if (raid_device->volume_type != MPI2_RAID_VOL_TYPE_RAID0) {
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ioc_info(ioc, "WarpDrive : Direct IO is disabled for the drive with handle(0x%04x): type=%d, s_sz=%uK, blk_size=%u\n",
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raid_device->handle, raid_device->volume_type,
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(le32_to_cpu(vol_pg0->StripeSize) *
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le16_to_cpu(vol_pg0->BlockSize)) / 1024,
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le16_to_cpu(vol_pg0->BlockSize));
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goto out_error;
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}
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stripe_sz = le32_to_cpu(vol_pg0->StripeSize);
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stripe_exp = find_first_bit(&stripe_sz, 32);
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if (stripe_exp == 32) {
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ioc_info(ioc, "WarpDrive : Direct IO is disabled for the drive with handle(0x%04x) invalid stripe sz %uK\n",
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raid_device->handle,
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(le32_to_cpu(vol_pg0->StripeSize) *
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le16_to_cpu(vol_pg0->BlockSize)) / 1024);
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goto out_error;
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}
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raid_device->stripe_exponent = stripe_exp;
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block_sz = le16_to_cpu(vol_pg0->BlockSize);
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block_exp = find_first_bit(&block_sz, 16);
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if (block_exp == 16) {
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ioc_info(ioc, "WarpDrive : Direct IO is disabled for the drive with handle(0x%04x) invalid block sz %u\n",
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raid_device->handle, le16_to_cpu(vol_pg0->BlockSize));
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goto out_error;
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}
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raid_device->block_exponent = block_exp;
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raid_device->direct_io_enabled = 1;
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ioc_info(ioc, "WarpDrive : Direct IO is Enabled for the drive with handle(0x%04x)\n",
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raid_device->handle);
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/*
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* WARPDRIVE: Though the following fields are not used for direct IO,
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* stored for future purpose:
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*/
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raid_device->max_lba = le64_to_cpu(vol_pg0->MaxLBA);
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raid_device->stripe_sz = le32_to_cpu(vol_pg0->StripeSize);
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raid_device->block_sz = le16_to_cpu(vol_pg0->BlockSize);
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kfree(vol_pg0);
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return;
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out_error:
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raid_device->direct_io_enabled = 0;
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for (count = 0; count < num_pds; count++)
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raid_device->pd_handle[count] = 0;
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kfree(vol_pg0);
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return;
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}
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/**
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* mpt3sas_setup_direct_io - setup MPI request for WARPDRIVE Direct I/O
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* @ioc: per adapter object
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* @scmd: pointer to scsi command object
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* @raid_device: pointer to raid device data structure
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* @mpi_request: pointer to the SCSI_IO reqest message frame
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*/
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void
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mpt3sas_setup_direct_io(struct MPT3SAS_ADAPTER *ioc, struct scsi_cmnd *scmd,
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struct _raid_device *raid_device, Mpi25SCSIIORequest_t *mpi_request)
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{
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sector_t v_lba, p_lba, stripe_off, column, io_size;
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u32 stripe_sz, stripe_exp;
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u8 num_pds, cmd = scmd->cmnd[0];
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struct scsiio_tracker *st = scsi_cmd_priv(scmd);
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if (cmd != READ_10 && cmd != WRITE_10 &&
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cmd != READ_16 && cmd != WRITE_16)
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return;
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if (cmd == READ_10 || cmd == WRITE_10)
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v_lba = get_unaligned_be32(&mpi_request->CDB.CDB32[2]);
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else
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v_lba = get_unaligned_be64(&mpi_request->CDB.CDB32[2]);
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io_size = scsi_bufflen(scmd) >> raid_device->block_exponent;
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if (v_lba + io_size - 1 > raid_device->max_lba)
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return;
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stripe_sz = raid_device->stripe_sz;
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stripe_exp = raid_device->stripe_exponent;
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stripe_off = v_lba & (stripe_sz - 1);
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/* Return unless IO falls within a stripe */
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if (stripe_off + io_size > stripe_sz)
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return;
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num_pds = raid_device->num_pds;
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p_lba = v_lba >> stripe_exp;
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column = sector_div(p_lba, num_pds);
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p_lba = (p_lba << stripe_exp) + stripe_off;
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mpi_request->DevHandle = cpu_to_le16(raid_device->pd_handle[column]);
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if (cmd == READ_10 || cmd == WRITE_10)
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put_unaligned_be32(lower_32_bits(p_lba),
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&mpi_request->CDB.CDB32[2]);
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else
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put_unaligned_be64(p_lba, &mpi_request->CDB.CDB32[2]);
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st->direct_io = 1;
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}
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