scsi/mpt3sas/mpt3sas_ctl.c

0001 /*
0002  * Management Module Support for MPT (Message Passing Technology) based
0003  * controllers
0004  *
0005  * This code is based on drivers/scsi/mpt3sas/mpt3sas_ctl.c
0006  * Copyright (C) 2012-2014  LSI Corporation
0007  * Copyright (C) 2013-2014 Avago Technologies
0008  *  (mailto: MPT-FusionLinux.pdl@avagotech.com)
0009  *
0010  * This program is free software; you can redistribute it and/or
0011  * modify it under the terms of the GNU General Public License
0012  * as published by the Free Software Foundation; either version 2
0013  * of the License, or (at your option) any later version.
0014  *
0015  * This program is distributed in the hope that it will be useful,
0016  * but WITHOUT ANY WARRANTY; without even the implied warranty of
0017  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
0018  * GNU General Public License for more details.
0019  *
0020  * NO WARRANTY
0021  * THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
0022  * CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
0023  * LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
0024  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
0025  * solely responsible for determining the appropriateness of using and
0026  * distributing the Program and assumes all risks associated with its
0027  * exercise of rights under this Agreement, including but not limited to
0028  * the risks and costs of program errors, damage to or loss of data,
0029  * programs or equipment, and unavailability or interruption of operations.
0030
0031  * DISCLAIMER OF LIABILITY
0032  * NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
0033  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
0034  * DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
0035  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
0036  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
0037  * USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
0038  * HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
0039
0040  * You should have received a copy of the GNU General Public License
0041  * along with this program; if not, write to the Free Software
0042  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
0043  * USA.
0044  */
0045
0046 #include <linux/kernel.h>
0047 #include <linux/module.h>
0048 #include <linux/errno.h>
0049 #include <linux/init.h>
0050 #include <linux/slab.h>
0051 #include <linux/types.h>
0052 #include <linux/pci.h>
0053 #include <linux/delay.h>
0054 #include <linux/compat.h>
0055 #include <linux/poll.h>
0056
0057 #include <linux/io.h>
0058 #include <linux/uaccess.h>
0059
0060 #include "mpt3sas_base.h"
0061 #include "mpt3sas_ctl.h"
0062
0063
0064 static struct fasync_struct *async_queue;
0065 static DECLARE_WAIT_QUEUE_HEAD(ctl_poll_wait);
0066
0067
0068 /**
0069  * enum block_state - blocking state
0070  * @NON_BLOCKING: non blocking
0071  * @BLOCKING: blocking
0072  *
0073  * These states are for ioctls that need to wait for a response
0074  * from firmware, so they probably require sleep.
0075  */
0076 enum block_state {
0077     NON_BLOCKING,
0078     BLOCKING,
0079 };
0080
0081 /**
0082  * _ctl_display_some_debug - debug routine
0083  * @ioc: per adapter object
0084  * @smid: system request message index
0085  * @calling_function_name: string pass from calling function
0086  * @mpi_reply: reply message frame
0087  * Context: none.
0088  *
0089  * Function for displaying debug info helpful when debugging issues
0090  * in this module.
0091  */
0092 static void
0093 _ctl_display_some_debug(struct MPT3SAS_ADAPTER *ioc, u16 smid,
0094     char *calling_function_name, MPI2DefaultReply_t *mpi_reply)
0095 {
0096     Mpi2ConfigRequest_t *mpi_request;
0097     char *desc = NULL;
0098
0099     if (!(ioc->logging_level & MPT_DEBUG_IOCTL))
0100         return;
0101
0102     mpi_request = mpt3sas_base_get_msg_frame(ioc, smid);
0103     switch (mpi_request->Function) {
0104     case MPI2_FUNCTION_SCSI_IO_REQUEST:
0105     {
0106         Mpi2SCSIIORequest_t *scsi_request =
0107             (Mpi2SCSIIORequest_t *)mpi_request;
0108
0109         snprintf(ioc->tmp_string, MPT_STRING_LENGTH,
0110             "scsi_io, cmd(0x%02x), cdb_len(%d)",
0111             scsi_request->CDB.CDB32[0],
0112             le16_to_cpu(scsi_request->IoFlags) & 0xF);
0113         desc = ioc->tmp_string;
0114         break;
0115     }
0116     case MPI2_FUNCTION_SCSI_TASK_MGMT:
0117         desc = "task_mgmt";
0118         break;
0119     case MPI2_FUNCTION_IOC_INIT:
0120         desc = "ioc_init";
0121         break;
0122     case MPI2_FUNCTION_IOC_FACTS:
0123         desc = "ioc_facts";
0124         break;
0125     case MPI2_FUNCTION_CONFIG:
0126     {
0127         Mpi2ConfigRequest_t *config_request =
0128             (Mpi2ConfigRequest_t *)mpi_request;
0129
0130         snprintf(ioc->tmp_string, MPT_STRING_LENGTH,
0131             "config, type(0x%02x), ext_type(0x%02x), number(%d)",
0132             (config_request->Header.PageType &
0133              MPI2_CONFIG_PAGETYPE_MASK), config_request->ExtPageType,
0134             config_request->Header.PageNumber);
0135         desc = ioc->tmp_string;
0136         break;
0137     }
0138     case MPI2_FUNCTION_PORT_FACTS:
0139         desc = "port_facts";
0140         break;
0141     case MPI2_FUNCTION_PORT_ENABLE:
0142         desc = "port_enable";
0143         break;
0144     case MPI2_FUNCTION_EVENT_NOTIFICATION:
0145         desc = "event_notification";
0146         break;
0147     case MPI2_FUNCTION_FW_DOWNLOAD:
0148         desc = "fw_download";
0149         break;
0150     case MPI2_FUNCTION_FW_UPLOAD:
0151         desc = "fw_upload";
0152         break;
0153     case MPI2_FUNCTION_RAID_ACTION:
0154         desc = "raid_action";
0155         break;
0156     case MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH:
0157     {
0158         Mpi2SCSIIORequest_t *scsi_request =
0159             (Mpi2SCSIIORequest_t *)mpi_request;
0160
0161         snprintf(ioc->tmp_string, MPT_STRING_LENGTH,
0162             "raid_pass, cmd(0x%02x), cdb_len(%d)",
0163             scsi_request->CDB.CDB32[0],
0164             le16_to_cpu(scsi_request->IoFlags) & 0xF);
0165         desc = ioc->tmp_string;
0166         break;
0167     }
0168     case MPI2_FUNCTION_SAS_IO_UNIT_CONTROL:
0169         desc = "sas_iounit_cntl";
0170         break;
0171     case MPI2_FUNCTION_SATA_PASSTHROUGH:
0172         desc = "sata_pass";
0173         break;
0174     case MPI2_FUNCTION_DIAG_BUFFER_POST:
0175         desc = "diag_buffer_post";
0176         break;
0177     case MPI2_FUNCTION_DIAG_RELEASE:
0178         desc = "diag_release";
0179         break;
0180     case MPI2_FUNCTION_SMP_PASSTHROUGH:
0181         desc = "smp_passthrough";
0182         break;
0183     case MPI2_FUNCTION_TOOLBOX:
0184         desc = "toolbox";
0185         break;
0186     case MPI2_FUNCTION_NVME_ENCAPSULATED:
0187         desc = "nvme_encapsulated";
0188         break;
0189     }
0190
0191     if (!desc)
0192         return;
0193
0194     ioc_info(ioc, "%s: %s, smid(%d)\n", calling_function_name, desc, smid);
0195
0196     if (!mpi_reply)
0197         return;
0198
0199     if (mpi_reply->IOCStatus || mpi_reply->IOCLogInfo)
0200         ioc_info(ioc, "\tiocstatus(0x%04x), loginfo(0x%08x)\n",
0201              le16_to_cpu(mpi_reply->IOCStatus),
0202              le32_to_cpu(mpi_reply->IOCLogInfo));
0203
0204     if (mpi_request->Function == MPI2_FUNCTION_SCSI_IO_REQUEST ||
0205         mpi_request->Function ==
0206         MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH) {
0207         Mpi2SCSIIOReply_t *scsi_reply =
0208             (Mpi2SCSIIOReply_t *)mpi_reply;
0209         struct _sas_device *sas_device = NULL;
0210         struct _pcie_device *pcie_device = NULL;
0211
0212         sas_device = mpt3sas_get_sdev_by_handle(ioc,
0213             le16_to_cpu(scsi_reply->DevHandle));
0214         if (sas_device) {
0215             ioc_warn(ioc, "\tsas_address(0x%016llx), phy(%d)\n",
0216                  (u64)sas_device->sas_address,
0217                  sas_device->phy);
0218             ioc_warn(ioc, "\tenclosure_logical_id(0x%016llx), slot(%d)\n",
0219                  (u64)sas_device->enclosure_logical_id,
0220                  sas_device->slot);
0221             sas_device_put(sas_device);
0222         }
0223         if (!sas_device) {
0224             pcie_device = mpt3sas_get_pdev_by_handle(ioc,
0225                 le16_to_cpu(scsi_reply->DevHandle));
0226             if (pcie_device) {
0227                 ioc_warn(ioc, "\tWWID(0x%016llx), port(%d)\n",
0228                      (unsigned long long)pcie_device->wwid,
0229                      pcie_device->port_num);
0230                 if (pcie_device->enclosure_handle != 0)
0231                     ioc_warn(ioc, "\tenclosure_logical_id(0x%016llx), slot(%d)\n",
0232                          (u64)pcie_device->enclosure_logical_id,
0233                          pcie_device->slot);
0234                 pcie_device_put(pcie_device);
0235             }
0236         }
0237         if (scsi_reply->SCSIState || scsi_reply->SCSIStatus)
0238             ioc_info(ioc, "\tscsi_state(0x%02x), scsi_status(0x%02x)\n",
0239                  scsi_reply->SCSIState,
0240                  scsi_reply->SCSIStatus);
0241     }
0242 }
0243
0244 /**
0245  * mpt3sas_ctl_done - ctl module completion routine
0246  * @ioc: per adapter object
0247  * @smid: system request message index
0248  * @msix_index: MSIX table index supplied by the OS
0249  * @reply: reply message frame(lower 32bit addr)
0250  * Context: none.
0251  *
0252  * The callback handler when using ioc->ctl_cb_idx.
0253  *
0254  * Return: 1 meaning mf should be freed from _base_interrupt
0255  *         0 means the mf is freed from this function.
0256  */
0257 u8
0258 mpt3sas_ctl_done(struct MPT3SAS_ADAPTER *ioc, u16 smid, u8 msix_index,
0259     u32 reply)
0260 {
0261     MPI2DefaultReply_t *mpi_reply;
0262     Mpi2SCSIIOReply_t *scsiio_reply;
0263     Mpi26NVMeEncapsulatedErrorReply_t *nvme_error_reply;
0264     const void *sense_data;
0265     u32 sz;
0266
0267     if (ioc->ctl_cmds.status == MPT3_CMD_NOT_USED)
0268         return 1;
0269     if (ioc->ctl_cmds.smid != smid)
0270         return 1;
0271     ioc->ctl_cmds.status |= MPT3_CMD_COMPLETE;
0272     mpi_reply = mpt3sas_base_get_reply_virt_addr(ioc, reply);
0273     if (mpi_reply) {
0274         memcpy(ioc->ctl_cmds.reply, mpi_reply, mpi_reply->MsgLength*4);
0275         ioc->ctl_cmds.status |= MPT3_CMD_REPLY_VALID;
0276         /* get sense data */
0277         if (mpi_reply->Function == MPI2_FUNCTION_SCSI_IO_REQUEST ||
0278             mpi_reply->Function ==
0279             MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH) {
0280             scsiio_reply = (Mpi2SCSIIOReply_t *)mpi_reply;
0281             if (scsiio_reply->SCSIState &
0282                 MPI2_SCSI_STATE_AUTOSENSE_VALID) {
0283                 sz = min_t(u32, SCSI_SENSE_BUFFERSIZE,
0284                     le32_to_cpu(scsiio_reply->SenseCount));
0285                 sense_data = mpt3sas_base_get_sense_buffer(ioc,
0286                     smid);
0287                 memcpy(ioc->ctl_cmds.sense, sense_data, sz);
0288             }
0289         }
0290         /*
0291          * Get Error Response data for NVMe device. The ctl_cmds.sense
0292          * buffer is used to store the Error Response data.
0293          */
0294         if (mpi_reply->Function == MPI2_FUNCTION_NVME_ENCAPSULATED) {
0295             nvme_error_reply =
0296                 (Mpi26NVMeEncapsulatedErrorReply_t *)mpi_reply;
0297             sz = min_t(u32, NVME_ERROR_RESPONSE_SIZE,
0298                 le16_to_cpu(nvme_error_reply->ErrorResponseCount));
0299             sense_data = mpt3sas_base_get_sense_buffer(ioc, smid);
0300             memcpy(ioc->ctl_cmds.sense, sense_data, sz);
0301         }
0302     }
0303
0304     _ctl_display_some_debug(ioc, smid, "ctl_done", mpi_reply);
0305     ioc->ctl_cmds.status &= ~MPT3_CMD_PENDING;
0306     complete(&ioc->ctl_cmds.done);
0307     return 1;
0308 }
0309
0310 /**
0311  * _ctl_check_event_type - determines when an event needs logging
0312  * @ioc: per adapter object
0313  * @event: firmware event
0314  *
0315  * The bitmask in ioc->event_type[] indicates which events should be
0316  * be saved in the driver event_log.  This bitmask is set by application.
0317  *
0318  * Return: 1 when event should be captured, or zero means no match.
0319  */
0320 static int
0321 _ctl_check_event_type(struct MPT3SAS_ADAPTER *ioc, u16 event)
0322 {
0323     u16 i;
0324     u32 desired_event;
0325
0326     if (event >= 128 || !event || !ioc->event_log)
0327         return 0;
0328
0329     desired_event = (1 << (event % 32));
0330     if (!desired_event)
0331         desired_event = 1;
0332     i = event / 32;
0333     return desired_event & ioc->event_type[i];
0334 }
0335
0336 /**
0337  * mpt3sas_ctl_add_to_event_log - add event
0338  * @ioc: per adapter object
0339  * @mpi_reply: reply message frame
0340  */
0341 void
0342 mpt3sas_ctl_add_to_event_log(struct MPT3SAS_ADAPTER *ioc,
0343     Mpi2EventNotificationReply_t *mpi_reply)
0344 {
0345     struct MPT3_IOCTL_EVENTS *event_log;
0346     u16 event;
0347     int i;
0348     u32 sz, event_data_sz;
0349     u8 send_aen = 0;
0350
0351     if (!ioc->event_log)
0352         return;
0353
0354     event = le16_to_cpu(mpi_reply->Event);
0355
0356     if (_ctl_check_event_type(ioc, event)) {
0357
0358         /* insert entry into circular event_log */
0359         i = ioc->event_context % MPT3SAS_CTL_EVENT_LOG_SIZE;
0360         event_log = ioc->event_log;
0361         event_log[i].event = event;
0362         event_log[i].context = ioc->event_context++;
0363
0364         event_data_sz = le16_to_cpu(mpi_reply->EventDataLength)*4;
0365         sz = min_t(u32, event_data_sz, MPT3_EVENT_DATA_SIZE);
0366         memset(event_log[i].data, 0, MPT3_EVENT_DATA_SIZE);
0367         memcpy(event_log[i].data, mpi_reply->EventData, sz);
0368         send_aen = 1;
0369     }
0370
0371     /* This aen_event_read_flag flag is set until the
0372      * application has read the event log.
0373      * For MPI2_EVENT_LOG_ENTRY_ADDED, we always notify.
0374      */
0375     if (event == MPI2_EVENT_LOG_ENTRY_ADDED ||
0376         (send_aen && !ioc->aen_event_read_flag)) {
0377         ioc->aen_event_read_flag = 1;
0378         wake_up_interruptible(&ctl_poll_wait);
0379         if (async_queue)
0380             kill_fasync(&async_queue, SIGIO, POLL_IN);
0381     }
0382 }
0383
0384 /**
0385  * mpt3sas_ctl_event_callback - firmware event handler (called at ISR time)
0386  * @ioc: per adapter object
0387  * @msix_index: MSIX table index supplied by the OS
0388  * @reply: reply message frame(lower 32bit addr)
0389  * Context: interrupt.
0390  *
0391  * This function merely adds a new work task into ioc->firmware_event_thread.
0392  * The tasks are worked from _firmware_event_work in user context.
0393  *
0394  * Return: 1 meaning mf should be freed from _base_interrupt
0395  *         0 means the mf is freed from this function.
0396  */
0397 u8
0398 mpt3sas_ctl_event_callback(struct MPT3SAS_ADAPTER *ioc, u8 msix_index,
0399     u32 reply)
0400 {
0401     Mpi2EventNotificationReply_t *mpi_reply;
0402
0403     mpi_reply = mpt3sas_base_get_reply_virt_addr(ioc, reply);
0404     if (mpi_reply)
0405         mpt3sas_ctl_add_to_event_log(ioc, mpi_reply);
0406     return 1;
0407 }
0408
0409 /**
0410  * _ctl_verify_adapter - validates ioc_number passed from application
0411  * @ioc_number: ?
0412  * @iocpp: The ioc pointer is returned in this.
0413  * @mpi_version: will be MPI2_VERSION for mpt2ctl ioctl device &
0414  * MPI25_VERSION | MPI26_VERSION for mpt3ctl ioctl device.
0415  *
0416  * Return: (-1) means error, else ioc_number.
0417  */
0418 static int
0419 _ctl_verify_adapter(int ioc_number, struct MPT3SAS_ADAPTER **iocpp,
0420                             int mpi_version)
0421 {
0422     struct MPT3SAS_ADAPTER *ioc;
0423     int version = 0;
0424     /* global ioc lock to protect controller on list operations */
0425     spin_lock(&gioc_lock);
0426     list_for_each_entry(ioc, &mpt3sas_ioc_list, list) {
0427         if (ioc->id != ioc_number)
0428             continue;
0429         /* Check whether this ioctl command is from right
0430          * ioctl device or not, if not continue the search.
0431          */
0432         version = ioc->hba_mpi_version_belonged;
0433         /* MPI25_VERSION and MPI26_VERSION uses same ioctl
0434          * device.
0435          */
0436         if (mpi_version == (MPI25_VERSION | MPI26_VERSION)) {
0437             if ((version == MPI25_VERSION) ||
0438                 (version == MPI26_VERSION))
0439                 goto out;
0440             else
0441                 continue;
0442         } else {
0443             if (version != mpi_version)
0444                 continue;
0445         }
0446 out:
0447         spin_unlock(&gioc_lock);
0448         *iocpp = ioc;
0449         return ioc_number;
0450     }
0451     spin_unlock(&gioc_lock);
0452     *iocpp = NULL;
0453     return -1;
0454 }
0455
0456 /**
0457  * mpt3sas_ctl_pre_reset_handler - reset callback handler (for ctl)
0458  * @ioc: per adapter object
0459  *
0460  * The handler for doing any required cleanup or initialization.
0461  */
0462 void mpt3sas_ctl_pre_reset_handler(struct MPT3SAS_ADAPTER *ioc)
0463 {
0464     int i;
0465     u8 issue_reset;
0466
0467     dtmprintk(ioc, ioc_info(ioc, "%s: MPT3_IOC_PRE_RESET\n", __func__));
0468     for (i = 0; i < MPI2_DIAG_BUF_TYPE_COUNT; i++) {
0469         if (!(ioc->diag_buffer_status[i] &
0470               MPT3_DIAG_BUFFER_IS_REGISTERED))
0471             continue;
0472         if ((ioc->diag_buffer_status[i] &
0473              MPT3_DIAG_BUFFER_IS_RELEASED))
0474             continue;
0475
0476         /*
0477          * add a log message to indicate the release
0478          */
0479         ioc_info(ioc,
0480             "%s: Releasing the trace buffer due to adapter reset.",
0481             __func__);
0482         ioc->htb_rel.buffer_rel_condition =
0483             MPT3_DIAG_BUFFER_REL_TRIGGER;
0484         mpt3sas_send_diag_release(ioc, i, &issue_reset);
0485     }
0486 }
0487
0488 /**
0489  * mpt3sas_ctl_clear_outstanding_ioctls - clears outstanding ioctl cmd.
0490  * @ioc: per adapter object
0491  *
0492  * The handler for doing any required cleanup or initialization.
0493  */
0494 void mpt3sas_ctl_clear_outstanding_ioctls(struct MPT3SAS_ADAPTER *ioc)
0495 {
0496     dtmprintk(ioc,
0497         ioc_info(ioc, "%s: clear outstanding ioctl cmd\n", __func__));
0498     if (ioc->ctl_cmds.status & MPT3_CMD_PENDING) {
0499         ioc->ctl_cmds.status |= MPT3_CMD_RESET;
0500         mpt3sas_base_free_smid(ioc, ioc->ctl_cmds.smid);
0501         complete(&ioc->ctl_cmds.done);
0502     }
0503 }
0504
0505 /**
0506  * mpt3sas_ctl_reset_done_handler - reset callback handler (for ctl)
0507  * @ioc: per adapter object
0508  *
0509  * The handler for doing any required cleanup or initialization.
0510  */
0511 void mpt3sas_ctl_reset_done_handler(struct MPT3SAS_ADAPTER *ioc)
0512 {
0513     int i;
0514
0515     dtmprintk(ioc, ioc_info(ioc, "%s: MPT3_IOC_DONE_RESET\n", __func__));
0516
0517     for (i = 0; i < MPI2_DIAG_BUF_TYPE_COUNT; i++) {
0518         if (!(ioc->diag_buffer_status[i] &
0519               MPT3_DIAG_BUFFER_IS_REGISTERED))
0520             continue;
0521         if ((ioc->diag_buffer_status[i] &
0522              MPT3_DIAG_BUFFER_IS_RELEASED))
0523             continue;
0524         ioc->diag_buffer_status[i] |=
0525             MPT3_DIAG_BUFFER_IS_DIAG_RESET;
0526     }
0527 }
0528
0529 /**
0530  * _ctl_fasync -
0531  * @fd: ?
0532  * @filep: ?
0533  * @mode: ?
0534  *
0535  * Called when application request fasyn callback handler.
0536  */
0537 static int
0538 _ctl_fasync(int fd, struct file *filep, int mode)
0539 {
0540     return fasync_helper(fd, filep, mode, &async_queue);
0541 }
0542
0543 /**
0544  * _ctl_poll -
0545  * @filep: ?
0546  * @wait: ?
0547  *
0548  */
0549 static __poll_t
0550 _ctl_poll(struct file *filep, poll_table *wait)
0551 {
0552     struct MPT3SAS_ADAPTER *ioc;
0553
0554     poll_wait(filep, &ctl_poll_wait, wait);
0555
0556     /* global ioc lock to protect controller on list operations */
0557     spin_lock(&gioc_lock);
0558     list_for_each_entry(ioc, &mpt3sas_ioc_list, list) {
0559         if (ioc->aen_event_read_flag) {
0560             spin_unlock(&gioc_lock);
0561             return EPOLLIN | EPOLLRDNORM;
0562         }
0563     }
0564     spin_unlock(&gioc_lock);
0565     return 0;
0566 }
0567
0568 /**
0569  * _ctl_set_task_mid - assign an active smid to tm request
0570  * @ioc: per adapter object
0571  * @karg: (struct mpt3_ioctl_command)
0572  * @tm_request: pointer to mf from user space
0573  *
0574  * Return: 0 when an smid if found, else fail.
0575  * during failure, the reply frame is filled.
0576  */
0577 static int
0578 _ctl_set_task_mid(struct MPT3SAS_ADAPTER *ioc, struct mpt3_ioctl_command *karg,
0579     Mpi2SCSITaskManagementRequest_t *tm_request)
0580 {
0581     bool found = false;
0582     u16 smid;
0583     u16 handle;
0584     struct scsi_cmnd *scmd;
0585     struct MPT3SAS_DEVICE *priv_data;
0586     Mpi2SCSITaskManagementReply_t *tm_reply;
0587     u32 sz;
0588     u32 lun;
0589     char *desc = NULL;
0590
0591     if (tm_request->TaskType == MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK)
0592         desc = "abort_task";
0593     else if (tm_request->TaskType == MPI2_SCSITASKMGMT_TASKTYPE_QUERY_TASK)
0594         desc = "query_task";
0595     else
0596         return 0;
0597
0598     lun = scsilun_to_int((struct scsi_lun *)tm_request->LUN);
0599
0600     handle = le16_to_cpu(tm_request->DevHandle);
0601     for (smid = ioc->scsiio_depth; smid && !found; smid--) {
0602         struct scsiio_tracker *st;
0603         __le16 task_mid;
0604
0605         scmd = mpt3sas_scsih_scsi_lookup_get(ioc, smid);
0606         if (!scmd)
0607             continue;
0608         if (lun != scmd->device->lun)
0609             continue;
0610         priv_data = scmd->device->hostdata;
0611         if (priv_data->sas_target == NULL)
0612             continue;
0613         if (priv_data->sas_target->handle != handle)
0614             continue;
0615         st = scsi_cmd_priv(scmd);
0616
0617         /*
0618          * If the given TaskMID from the user space is zero, then the
0619          * first outstanding smid will be picked up.  Otherwise,
0620          * targeted smid will be the one.
0621          */
0622         task_mid = cpu_to_le16(st->smid);
0623         if (!tm_request->TaskMID)
0624             tm_request->TaskMID = task_mid;
0625         found = tm_request->TaskMID == task_mid;
0626     }
0627
0628     if (!found) {
0629         dctlprintk(ioc,
0630                ioc_info(ioc, "%s: handle(0x%04x), lun(%d), no active mid!!\n",
0631                     desc, le16_to_cpu(tm_request->DevHandle),
0632                     lun));
0633         tm_reply = ioc->ctl_cmds.reply;
0634         tm_reply->DevHandle = tm_request->DevHandle;
0635         tm_reply->Function = MPI2_FUNCTION_SCSI_TASK_MGMT;
0636         tm_reply->TaskType = tm_request->TaskType;
0637         tm_reply->MsgLength = sizeof(Mpi2SCSITaskManagementReply_t)/4;
0638         tm_reply->VP_ID = tm_request->VP_ID;
0639         tm_reply->VF_ID = tm_request->VF_ID;
0640         sz = min_t(u32, karg->max_reply_bytes, ioc->reply_sz);
0641         if (copy_to_user(karg->reply_frame_buf_ptr, ioc->ctl_cmds.reply,
0642             sz))
0643             pr_err("failure at %s:%d/%s()!\n", __FILE__,
0644                 __LINE__, __func__);
0645         return 1;
0646     }
0647
0648     dctlprintk(ioc,
0649            ioc_info(ioc, "%s: handle(0x%04x), lun(%d), task_mid(%d)\n",
0650                 desc, le16_to_cpu(tm_request->DevHandle), lun,
0651                 le16_to_cpu(tm_request->TaskMID)));
0652     return 0;
0653 }
0654
0655 /**
0656  * _ctl_do_mpt_command - main handler for MPT3COMMAND opcode
0657  * @ioc: per adapter object
0658  * @karg: (struct mpt3_ioctl_command)
0659  * @mf: pointer to mf in user space
0660  */
0661 static long
0662 _ctl_do_mpt_command(struct MPT3SAS_ADAPTER *ioc, struct mpt3_ioctl_command karg,
0663     void __user *mf)
0664 {
0665     MPI2RequestHeader_t *mpi_request = NULL, *request;
0666     MPI2DefaultReply_t *mpi_reply;
0667     Mpi26NVMeEncapsulatedRequest_t *nvme_encap_request = NULL;
0668     struct _pcie_device *pcie_device = NULL;
0669     u16 smid;
0670     unsigned long timeout;
0671     u8 issue_reset;
0672     u32 sz, sz_arg;
0673     void *psge;
0674     void *data_out = NULL;
0675     dma_addr_t data_out_dma = 0;
0676     size_t data_out_sz = 0;
0677     void *data_in = NULL;
0678     dma_addr_t data_in_dma = 0;
0679     size_t data_in_sz = 0;
0680     long ret;
0681     u16 device_handle = MPT3SAS_INVALID_DEVICE_HANDLE;
0682
0683     issue_reset = 0;
0684
0685     if (ioc->ctl_cmds.status != MPT3_CMD_NOT_USED) {
0686         ioc_err(ioc, "%s: ctl_cmd in use\n", __func__);
0687         ret = -EAGAIN;
0688         goto out;
0689     }
0690
0691     ret = mpt3sas_wait_for_ioc(ioc, IOC_OPERATIONAL_WAIT_COUNT);
0692     if (ret)
0693         goto out;
0694
0695     mpi_request = kzalloc(ioc->request_sz, GFP_KERNEL);
0696     if (!mpi_request) {
0697         ioc_err(ioc, "%s: failed obtaining a memory for mpi_request\n",
0698             __func__);
0699         ret = -ENOMEM;
0700         goto out;
0701     }
0702
0703     /* Check for overflow and wraparound */
0704     if (karg.data_sge_offset * 4 > ioc->request_sz ||
0705         karg.data_sge_offset > (UINT_MAX / 4)) {
0706         ret = -EINVAL;
0707         goto out;
0708     }
0709
0710     /* copy in request message frame from user */
0711     if (copy_from_user(mpi_request, mf, karg.data_sge_offset*4)) {
0712         pr_err("failure at %s:%d/%s()!\n", __FILE__, __LINE__,
0713             __func__);
0714         ret = -EFAULT;
0715         goto out;
0716     }
0717
0718     if (mpi_request->Function == MPI2_FUNCTION_SCSI_TASK_MGMT) {
0719         smid = mpt3sas_base_get_smid_hpr(ioc, ioc->ctl_cb_idx);
0720         if (!smid) {
0721             ioc_err(ioc, "%s: failed obtaining a smid\n", __func__);
0722             ret = -EAGAIN;
0723             goto out;
0724         }
0725     } else {
0726         /* Use first reserved smid for passthrough ioctls */
0727         smid = ioc->scsiio_depth - INTERNAL_SCSIIO_CMDS_COUNT + 1;
0728     }
0729
0730     ret = 0;
0731     ioc->ctl_cmds.status = MPT3_CMD_PENDING;
0732     memset(ioc->ctl_cmds.reply, 0, ioc->reply_sz);
0733     request = mpt3sas_base_get_msg_frame(ioc, smid);
0734     memset(request, 0, ioc->request_sz);
0735     memcpy(request, mpi_request, karg.data_sge_offset*4);
0736     ioc->ctl_cmds.smid = smid;
0737     data_out_sz = karg.data_out_size;
0738     data_in_sz = karg.data_in_size;
0739
0740     if (mpi_request->Function == MPI2_FUNCTION_SCSI_IO_REQUEST ||
0741         mpi_request->Function == MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH ||
0742         mpi_request->Function == MPI2_FUNCTION_SCSI_TASK_MGMT ||
0743         mpi_request->Function == MPI2_FUNCTION_SATA_PASSTHROUGH ||
0744         mpi_request->Function == MPI2_FUNCTION_NVME_ENCAPSULATED) {
0745
0746         device_handle = le16_to_cpu(mpi_request->FunctionDependent1);
0747         if (!device_handle || (device_handle >
0748             ioc->facts.MaxDevHandle)) {
0749             ret = -EINVAL;
0750             mpt3sas_base_free_smid(ioc, smid);
0751             goto out;
0752         }
0753     }
0754
0755     /* obtain dma-able memory for data transfer */
0756     if (data_out_sz) /* WRITE */ {
0757         data_out = dma_alloc_coherent(&ioc->pdev->dev, data_out_sz,
0758                 &data_out_dma, GFP_KERNEL);
0759         if (!data_out) {
0760             pr_err("failure at %s:%d/%s()!\n", __FILE__,
0761                 __LINE__, __func__);
0762             ret = -ENOMEM;
0763             mpt3sas_base_free_smid(ioc, smid);
0764             goto out;
0765         }
0766         if (copy_from_user(data_out, karg.data_out_buf_ptr,
0767             data_out_sz)) {
0768             pr_err("failure at %s:%d/%s()!\n", __FILE__,
0769                 __LINE__, __func__);
0770             ret =  -EFAULT;
0771             mpt3sas_base_free_smid(ioc, smid);
0772             goto out;
0773         }
0774     }
0775
0776     if (data_in_sz) /* READ */ {
0777         data_in = dma_alloc_coherent(&ioc->pdev->dev, data_in_sz,
0778                 &data_in_dma, GFP_KERNEL);
0779         if (!data_in) {
0780             pr_err("failure at %s:%d/%s()!\n", __FILE__,
0781                 __LINE__, __func__);
0782             ret = -ENOMEM;
0783             mpt3sas_base_free_smid(ioc, smid);
0784             goto out;
0785         }
0786     }
0787
0788     psge = (void *)request + (karg.data_sge_offset*4);
0789
0790     /* send command to firmware */
0791     _ctl_display_some_debug(ioc, smid, "ctl_request", NULL);
0792
0793     init_completion(&ioc->ctl_cmds.done);
0794     switch (mpi_request->Function) {
0795     case MPI2_FUNCTION_NVME_ENCAPSULATED:
0796     {
0797         nvme_encap_request = (Mpi26NVMeEncapsulatedRequest_t *)request;
0798         if (!ioc->pcie_sg_lookup) {
0799             dtmprintk(ioc, ioc_info(ioc,
0800                 "HBA doesn't support NVMe. Rejecting NVMe Encapsulated request.\n"
0801                 ));
0802
0803             if (ioc->logging_level & MPT_DEBUG_TM)
0804                 _debug_dump_mf(nvme_encap_request,
0805                     ioc->request_sz/4);
0806             mpt3sas_base_free_smid(ioc, smid);
0807             ret = -EINVAL;
0808             goto out;
0809         }
0810         /*
0811          * Get the Physical Address of the sense buffer.
0812          * Use Error Response buffer address field to hold the sense
0813          * buffer address.
0814          * Clear the internal sense buffer, which will potentially hold
0815          * the Completion Queue Entry on return, or 0 if no Entry.
0816          * Build the PRPs and set direction bits.
0817          * Send the request.
0818          */
0819         nvme_encap_request->ErrorResponseBaseAddress =
0820             cpu_to_le64(ioc->sense_dma & 0xFFFFFFFF00000000UL);
0821         nvme_encap_request->ErrorResponseBaseAddress |=
0822            cpu_to_le64(le32_to_cpu(
0823            mpt3sas_base_get_sense_buffer_dma(ioc, smid)));
0824         nvme_encap_request->ErrorResponseAllocationLength =
0825                     cpu_to_le16(NVME_ERROR_RESPONSE_SIZE);
0826         memset(ioc->ctl_cmds.sense, 0, NVME_ERROR_RESPONSE_SIZE);
0827         ioc->build_nvme_prp(ioc, smid, nvme_encap_request,
0828             data_out_dma, data_out_sz, data_in_dma, data_in_sz);
0829         if (test_bit(device_handle, ioc->device_remove_in_progress)) {
0830             dtmprintk(ioc,
0831                   ioc_info(ioc, "handle(0x%04x): ioctl failed due to device removal in progress\n",
0832                        device_handle));
0833             mpt3sas_base_free_smid(ioc, smid);
0834             ret = -EINVAL;
0835             goto out;
0836         }
0837         mpt3sas_base_put_smid_nvme_encap(ioc, smid);
0838         break;
0839     }
0840     case MPI2_FUNCTION_SCSI_IO_REQUEST:
0841     case MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH:
0842     {
0843         Mpi2SCSIIORequest_t *scsiio_request =
0844             (Mpi2SCSIIORequest_t *)request;
0845         scsiio_request->SenseBufferLength = SCSI_SENSE_BUFFERSIZE;
0846         scsiio_request->SenseBufferLowAddress =
0847             mpt3sas_base_get_sense_buffer_dma(ioc, smid);
0848         memset(ioc->ctl_cmds.sense, 0, SCSI_SENSE_BUFFERSIZE);
0849         if (test_bit(device_handle, ioc->device_remove_in_progress)) {
0850             dtmprintk(ioc,
0851                   ioc_info(ioc, "handle(0x%04x) :ioctl failed due to device removal in progress\n",
0852                        device_handle));
0853             mpt3sas_base_free_smid(ioc, smid);
0854             ret = -EINVAL;
0855             goto out;
0856         }
0857         ioc->build_sg(ioc, psge, data_out_dma, data_out_sz,
0858             data_in_dma, data_in_sz);
0859         if (mpi_request->Function == MPI2_FUNCTION_SCSI_IO_REQUEST)
0860             ioc->put_smid_scsi_io(ioc, smid, device_handle);
0861         else
0862             ioc->put_smid_default(ioc, smid);
0863         break;
0864     }
0865     case MPI2_FUNCTION_SCSI_TASK_MGMT:
0866     {
0867         Mpi2SCSITaskManagementRequest_t *tm_request =
0868             (Mpi2SCSITaskManagementRequest_t *)request;
0869
0870         dtmprintk(ioc,
0871               ioc_info(ioc, "TASK_MGMT: handle(0x%04x), task_type(0x%02x)\n",
0872                    le16_to_cpu(tm_request->DevHandle),
0873                    tm_request->TaskType));
0874         ioc->got_task_abort_from_ioctl = 1;
0875         if (tm_request->TaskType ==
0876             MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK ||
0877             tm_request->TaskType ==
0878             MPI2_SCSITASKMGMT_TASKTYPE_QUERY_TASK) {
0879             if (_ctl_set_task_mid(ioc, &karg, tm_request)) {
0880                 mpt3sas_base_free_smid(ioc, smid);
0881                 ioc->got_task_abort_from_ioctl = 0;
0882                 goto out;
0883             }
0884         }
0885         ioc->got_task_abort_from_ioctl = 0;
0886
0887         if (test_bit(device_handle, ioc->device_remove_in_progress)) {
0888             dtmprintk(ioc,
0889                   ioc_info(ioc, "handle(0x%04x) :ioctl failed due to device removal in progress\n",
0890                        device_handle));
0891             mpt3sas_base_free_smid(ioc, smid);
0892             ret = -EINVAL;
0893             goto out;
0894         }
0895         mpt3sas_scsih_set_tm_flag(ioc, le16_to_cpu(
0896             tm_request->DevHandle));
0897         ioc->build_sg_mpi(ioc, psge, data_out_dma, data_out_sz,
0898             data_in_dma, data_in_sz);
0899         ioc->put_smid_hi_priority(ioc, smid, 0);
0900         break;
0901     }
0902     case MPI2_FUNCTION_SMP_PASSTHROUGH:
0903     {
0904         Mpi2SmpPassthroughRequest_t *smp_request =
0905             (Mpi2SmpPassthroughRequest_t *)mpi_request;
0906         u8 *data;
0907
0908         if (!ioc->multipath_on_hba) {
0909             /* ioc determines which port to use */
0910             smp_request->PhysicalPort = 0xFF;
0911         }
0912         if (smp_request->PassthroughFlags &
0913             MPI2_SMP_PT_REQ_PT_FLAGS_IMMEDIATE)
0914             data = (u8 *)&smp_request->SGL;
0915         else {
0916             if (unlikely(data_out == NULL)) {
0917                 pr_err("failure at %s:%d/%s()!\n",
0918                     __FILE__, __LINE__, __func__);
0919                 mpt3sas_base_free_smid(ioc, smid);
0920                 ret = -EINVAL;
0921                 goto out;
0922             }
0923             data = data_out;
0924         }
0925
0926         if (data[1] == 0x91 && (data[10] == 1 || data[10] == 2)) {
0927             ioc->ioc_link_reset_in_progress = 1;
0928             ioc->ignore_loginfos = 1;
0929         }
0930         ioc->build_sg(ioc, psge, data_out_dma, data_out_sz, data_in_dma,
0931             data_in_sz);
0932         ioc->put_smid_default(ioc, smid);
0933         break;
0934     }
0935     case MPI2_FUNCTION_SATA_PASSTHROUGH:
0936     {
0937         if (test_bit(device_handle, ioc->device_remove_in_progress)) {
0938             dtmprintk(ioc,
0939                   ioc_info(ioc, "handle(0x%04x) :ioctl failed due to device removal in progress\n",
0940                        device_handle));
0941             mpt3sas_base_free_smid(ioc, smid);
0942             ret = -EINVAL;
0943             goto out;
0944         }
0945         ioc->build_sg(ioc, psge, data_out_dma, data_out_sz, data_in_dma,
0946             data_in_sz);
0947         ioc->put_smid_default(ioc, smid);
0948         break;
0949     }
0950     case MPI2_FUNCTION_FW_DOWNLOAD:
0951     case MPI2_FUNCTION_FW_UPLOAD:
0952     {
0953         ioc->build_sg(ioc, psge, data_out_dma, data_out_sz, data_in_dma,
0954             data_in_sz);
0955         ioc->put_smid_default(ioc, smid);
0956         break;
0957     }
0958     case MPI2_FUNCTION_TOOLBOX:
0959     {
0960         Mpi2ToolboxCleanRequest_t *toolbox_request =
0961             (Mpi2ToolboxCleanRequest_t *)mpi_request;
0962
0963         if ((toolbox_request->Tool == MPI2_TOOLBOX_DIAGNOSTIC_CLI_TOOL)
0964             || (toolbox_request->Tool ==
0965             MPI26_TOOLBOX_BACKEND_PCIE_LANE_MARGIN))
0966             ioc->build_sg(ioc, psge, data_out_dma, data_out_sz,
0967                 data_in_dma, data_in_sz);
0968         else if (toolbox_request->Tool ==
0969                 MPI2_TOOLBOX_MEMORY_MOVE_TOOL) {
0970             Mpi2ToolboxMemMoveRequest_t *mem_move_request =
0971                     (Mpi2ToolboxMemMoveRequest_t *)request;
0972             Mpi2SGESimple64_t tmp, *src = NULL, *dst = NULL;
0973
0974             ioc->build_sg_mpi(ioc, psge, data_out_dma,
0975                     data_out_sz, data_in_dma, data_in_sz);
0976             if (data_out_sz && !data_in_sz) {
0977                 dst =
0978                     (Mpi2SGESimple64_t *)&mem_move_request->SGL;
0979                 src = (void *)dst + ioc->sge_size;
0980
0981                 memcpy(&tmp, src, ioc->sge_size);
0982                 memcpy(src, dst, ioc->sge_size);
0983                 memcpy(dst, &tmp, ioc->sge_size);
0984             }
0985             if (ioc->logging_level & MPT_DEBUG_TM) {
0986                 ioc_info(ioc,
0987                   "Mpi2ToolboxMemMoveRequest_t request msg\n");
0988                 _debug_dump_mf(mem_move_request,
0989                             ioc->request_sz/4);
0990             }
0991         } else
0992             ioc->build_sg_mpi(ioc, psge, data_out_dma, data_out_sz,
0993                 data_in_dma, data_in_sz);
0994         ioc->put_smid_default(ioc, smid);
0995         break;
0996     }
0997     case MPI2_FUNCTION_SAS_IO_UNIT_CONTROL:
0998     {
0999         Mpi2SasIoUnitControlRequest_t *sasiounit_request =
1000             (Mpi2SasIoUnitControlRequest_t *)mpi_request;
1001
1002         if (sasiounit_request->Operation == MPI2_SAS_OP_PHY_HARD_RESET
1003             || sasiounit_request->Operation ==
1004             MPI2_SAS_OP_PHY_LINK_RESET) {
1005             ioc->ioc_link_reset_in_progress = 1;
1006             ioc->ignore_loginfos = 1;
1007         }
1008         /* drop to default case for posting the request */
1009     }
1010         fallthrough;
1011     default:
1012         ioc->build_sg_mpi(ioc, psge, data_out_dma, data_out_sz,
1013             data_in_dma, data_in_sz);
1014         ioc->put_smid_default(ioc, smid);
1015         break;
1016     }
1017
1018     if (karg.timeout < MPT3_IOCTL_DEFAULT_TIMEOUT)
1019         timeout = MPT3_IOCTL_DEFAULT_TIMEOUT;
1020     else
1021         timeout = karg.timeout;
1022     wait_for_completion_timeout(&ioc->ctl_cmds.done, timeout*HZ);
1023     if (mpi_request->Function == MPI2_FUNCTION_SCSI_TASK_MGMT) {
1024         Mpi2SCSITaskManagementRequest_t *tm_request =
1025             (Mpi2SCSITaskManagementRequest_t *)mpi_request;
1026         mpt3sas_scsih_clear_tm_flag(ioc, le16_to_cpu(
1027             tm_request->DevHandle));
1028         mpt3sas_trigger_master(ioc, MASTER_TRIGGER_TASK_MANAGMENT);
1029     } else if ((mpi_request->Function == MPI2_FUNCTION_SMP_PASSTHROUGH ||
1030         mpi_request->Function == MPI2_FUNCTION_SAS_IO_UNIT_CONTROL) &&
1031         ioc->ioc_link_reset_in_progress) {
1032         ioc->ioc_link_reset_in_progress = 0;
1033         ioc->ignore_loginfos = 0;
1034     }
1035     if (!(ioc->ctl_cmds.status & MPT3_CMD_COMPLETE)) {
1036         mpt3sas_check_cmd_timeout(ioc,
1037             ioc->ctl_cmds.status, mpi_request,
1038             karg.data_sge_offset, issue_reset);
1039         goto issue_host_reset;
1040     }
1041
1042     mpi_reply = ioc->ctl_cmds.reply;
1043
1044     if (mpi_reply->Function == MPI2_FUNCTION_SCSI_TASK_MGMT &&
1045         (ioc->logging_level & MPT_DEBUG_TM)) {
1046         Mpi2SCSITaskManagementReply_t *tm_reply =
1047             (Mpi2SCSITaskManagementReply_t *)mpi_reply;
1048
1049         ioc_info(ioc, "TASK_MGMT: IOCStatus(0x%04x), IOCLogInfo(0x%08x), TerminationCount(0x%08x)\n",
1050              le16_to_cpu(tm_reply->IOCStatus),
1051              le32_to_cpu(tm_reply->IOCLogInfo),
1052              le32_to_cpu(tm_reply->TerminationCount));
1053     }
1054
1055     /* copy out xdata to user */
1056     if (data_in_sz) {
1057         if (copy_to_user(karg.data_in_buf_ptr, data_in,
1058             data_in_sz)) {
1059             pr_err("failure at %s:%d/%s()!\n", __FILE__,
1060                 __LINE__, __func__);
1061             ret = -ENODATA;
1062             goto out;
1063         }
1064     }
1065
1066     /* copy out reply message frame to user */
1067     if (karg.max_reply_bytes) {
1068         sz = min_t(u32, karg.max_reply_bytes, ioc->reply_sz);
1069         if (copy_to_user(karg.reply_frame_buf_ptr, ioc->ctl_cmds.reply,
1070             sz)) {
1071             pr_err("failure at %s:%d/%s()!\n", __FILE__,
1072                 __LINE__, __func__);
1073             ret = -ENODATA;
1074             goto out;
1075         }
1076     }
1077
1078     /* copy out sense/NVMe Error Response to user */
1079     if (karg.max_sense_bytes && (mpi_request->Function ==
1080         MPI2_FUNCTION_SCSI_IO_REQUEST || mpi_request->Function ==
1081         MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH || mpi_request->Function ==
1082         MPI2_FUNCTION_NVME_ENCAPSULATED)) {
1083         if (karg.sense_data_ptr == NULL) {
1084             ioc_info(ioc, "Response buffer provided by application is NULL; Response data will not be returned\n");
1085             goto out;
1086         }
1087         sz_arg = (mpi_request->Function ==
1088         MPI2_FUNCTION_NVME_ENCAPSULATED) ? NVME_ERROR_RESPONSE_SIZE :
1089                             SCSI_SENSE_BUFFERSIZE;
1090         sz = min_t(u32, karg.max_sense_bytes, sz_arg);
1091         if (copy_to_user(karg.sense_data_ptr, ioc->ctl_cmds.sense,
1092             sz)) {
1093             pr_err("failure at %s:%d/%s()!\n", __FILE__,
1094                 __LINE__, __func__);
1095             ret = -ENODATA;
1096             goto out;
1097         }
1098     }
1099
1100  issue_host_reset:
1101     if (issue_reset) {
1102         ret = -ENODATA;
1103         if ((mpi_request->Function == MPI2_FUNCTION_SCSI_IO_REQUEST ||
1104             mpi_request->Function ==
1105             MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH ||
1106             mpi_request->Function == MPI2_FUNCTION_SATA_PASSTHROUGH)) {
1107             ioc_info(ioc, "issue target reset: handle = (0x%04x)\n",
1108                  le16_to_cpu(mpi_request->FunctionDependent1));
1109             mpt3sas_halt_firmware(ioc);
1110             pcie_device = mpt3sas_get_pdev_by_handle(ioc,
1111                 le16_to_cpu(mpi_request->FunctionDependent1));
1112             if (pcie_device && (!ioc->tm_custom_handling) &&
1113                 (!(mpt3sas_scsih_is_pcie_scsi_device(
1114                 pcie_device->device_info))))
1115                 mpt3sas_scsih_issue_locked_tm(ioc,
1116                   le16_to_cpu(mpi_request->FunctionDependent1),
1117                   0, 0, 0,
1118                   MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET, 0,
1119                   0, pcie_device->reset_timeout,
1120             MPI26_SCSITASKMGMT_MSGFLAGS_PROTOCOL_LVL_RST_PCIE);
1121             else
1122                 mpt3sas_scsih_issue_locked_tm(ioc,
1123                   le16_to_cpu(mpi_request->FunctionDependent1),
1124                   0, 0, 0,
1125                   MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET, 0,
1126                   0, 30, MPI2_SCSITASKMGMT_MSGFLAGS_LINK_RESET);
1127         } else
1128             mpt3sas_base_hard_reset_handler(ioc, FORCE_BIG_HAMMER);
1129     }
1130
1131  out:
1132     if (pcie_device)
1133         pcie_device_put(pcie_device);
1134
1135     /* free memory associated with sg buffers */
1136     if (data_in)
1137         dma_free_coherent(&ioc->pdev->dev, data_in_sz, data_in,
1138             data_in_dma);
1139
1140     if (data_out)
1141         dma_free_coherent(&ioc->pdev->dev, data_out_sz, data_out,
1142             data_out_dma);
1143
1144     kfree(mpi_request);
1145     ioc->ctl_cmds.status = MPT3_CMD_NOT_USED;
1146     return ret;
1147 }
1148
1149 /**
1150  * _ctl_getiocinfo - main handler for MPT3IOCINFO opcode
1151  * @ioc: per adapter object
1152  * @arg: user space buffer containing ioctl content
1153  */
1154 static long
1155 _ctl_getiocinfo(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
1156 {
1157     struct mpt3_ioctl_iocinfo karg;
1158
1159     dctlprintk(ioc, ioc_info(ioc, "%s: enter\n",
1160                  __func__));
1161
1162     memset(&karg, 0 , sizeof(karg));
1163     if (ioc->pfacts)
1164         karg.port_number = ioc->pfacts[0].PortNumber;
1165     karg.hw_rev = ioc->pdev->revision;
1166     karg.pci_id = ioc->pdev->device;
1167     karg.subsystem_device = ioc->pdev->subsystem_device;
1168     karg.subsystem_vendor = ioc->pdev->subsystem_vendor;
1169     karg.pci_information.u.bits.bus = ioc->pdev->bus->number;
1170     karg.pci_information.u.bits.device = PCI_SLOT(ioc->pdev->devfn);
1171     karg.pci_information.u.bits.function = PCI_FUNC(ioc->pdev->devfn);
1172     karg.pci_information.segment_id = pci_domain_nr(ioc->pdev->bus);
1173     karg.firmware_version = ioc->facts.FWVersion.Word;
1174     strcpy(karg.driver_version, ioc->driver_name);
1175     strcat(karg.driver_version, "-");
1176     switch  (ioc->hba_mpi_version_belonged) {
1177     case MPI2_VERSION:
1178         if (ioc->is_warpdrive)
1179             karg.adapter_type = MPT2_IOCTL_INTERFACE_SAS2_SSS6200;
1180         else
1181             karg.adapter_type = MPT2_IOCTL_INTERFACE_SAS2;
1182         strcat(karg.driver_version, MPT2SAS_DRIVER_VERSION);
1183         break;
1184     case MPI25_VERSION:
1185     case MPI26_VERSION:
1186         if (ioc->is_gen35_ioc)
1187             karg.adapter_type = MPT3_IOCTL_INTERFACE_SAS35;
1188         else
1189             karg.adapter_type = MPT3_IOCTL_INTERFACE_SAS3;
1190         strcat(karg.driver_version, MPT3SAS_DRIVER_VERSION);
1191         break;
1192     }
1193     karg.bios_version = le32_to_cpu(ioc->bios_pg3.BiosVersion);
1194
1195     if (copy_to_user(arg, &karg, sizeof(karg))) {
1196         pr_err("failure at %s:%d/%s()!\n",
1197             __FILE__, __LINE__, __func__);
1198         return -EFAULT;
1199     }
1200     return 0;
1201 }
1202
1203 /**
1204  * _ctl_eventquery - main handler for MPT3EVENTQUERY opcode
1205  * @ioc: per adapter object
1206  * @arg: user space buffer containing ioctl content
1207  */
1208 static long
1209 _ctl_eventquery(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
1210 {
1211     struct mpt3_ioctl_eventquery karg;
1212
1213     if (copy_from_user(&karg, arg, sizeof(karg))) {
1214         pr_err("failure at %s:%d/%s()!\n",
1215             __FILE__, __LINE__, __func__);
1216         return -EFAULT;
1217     }
1218
1219     dctlprintk(ioc, ioc_info(ioc, "%s: enter\n",
1220                  __func__));
1221
1222     karg.event_entries = MPT3SAS_CTL_EVENT_LOG_SIZE;
1223     memcpy(karg.event_types, ioc->event_type,
1224         MPI2_EVENT_NOTIFY_EVENTMASK_WORDS * sizeof(u32));
1225
1226     if (copy_to_user(arg, &karg, sizeof(karg))) {
1227         pr_err("failure at %s:%d/%s()!\n",
1228             __FILE__, __LINE__, __func__);
1229         return -EFAULT;
1230     }
1231     return 0;
1232 }
1233
1234 /**
1235  * _ctl_eventenable - main handler for MPT3EVENTENABLE opcode
1236  * @ioc: per adapter object
1237  * @arg: user space buffer containing ioctl content
1238  */
1239 static long
1240 _ctl_eventenable(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
1241 {
1242     struct mpt3_ioctl_eventenable karg;
1243
1244     if (copy_from_user(&karg, arg, sizeof(karg))) {
1245         pr_err("failure at %s:%d/%s()!\n",
1246             __FILE__, __LINE__, __func__);
1247         return -EFAULT;
1248     }
1249
1250     dctlprintk(ioc, ioc_info(ioc, "%s: enter\n",
1251                  __func__));
1252
1253     memcpy(ioc->event_type, karg.event_types,
1254         MPI2_EVENT_NOTIFY_EVENTMASK_WORDS * sizeof(u32));
1255     mpt3sas_base_validate_event_type(ioc, ioc->event_type);
1256
1257     if (ioc->event_log)
1258         return 0;
1259     /* initialize event_log */
1260     ioc->event_context = 0;
1261     ioc->aen_event_read_flag = 0;
1262     ioc->event_log = kcalloc(MPT3SAS_CTL_EVENT_LOG_SIZE,
1263         sizeof(struct MPT3_IOCTL_EVENTS), GFP_KERNEL);
1264     if (!ioc->event_log) {
1265         pr_err("failure at %s:%d/%s()!\n",
1266             __FILE__, __LINE__, __func__);
1267         return -ENOMEM;
1268     }
1269     return 0;
1270 }
1271
1272 /**
1273  * _ctl_eventreport - main handler for MPT3EVENTREPORT opcode
1274  * @ioc: per adapter object
1275  * @arg: user space buffer containing ioctl content
1276  */
1277 static long
1278 _ctl_eventreport(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
1279 {
1280     struct mpt3_ioctl_eventreport karg;
1281     u32 number_bytes, max_events, max;
1282     struct mpt3_ioctl_eventreport __user *uarg = arg;
1283
1284     if (copy_from_user(&karg, arg, sizeof(karg))) {
1285         pr_err("failure at %s:%d/%s()!\n",
1286             __FILE__, __LINE__, __func__);
1287         return -EFAULT;
1288     }
1289
1290     dctlprintk(ioc, ioc_info(ioc, "%s: enter\n",
1291                  __func__));
1292
1293     number_bytes = karg.hdr.max_data_size -
1294         sizeof(struct mpt3_ioctl_header);
1295     max_events = number_bytes/sizeof(struct MPT3_IOCTL_EVENTS);
1296     max = min_t(u32, MPT3SAS_CTL_EVENT_LOG_SIZE, max_events);
1297
1298     /* If fewer than 1 event is requested, there must have
1299      * been some type of error.
1300      */
1301     if (!max || !ioc->event_log)
1302         return -ENODATA;
1303
1304     number_bytes = max * sizeof(struct MPT3_IOCTL_EVENTS);
1305     if (copy_to_user(uarg->event_data, ioc->event_log, number_bytes)) {
1306         pr_err("failure at %s:%d/%s()!\n",
1307             __FILE__, __LINE__, __func__);
1308         return -EFAULT;
1309     }
1310
1311     /* reset flag so SIGIO can restart */
1312     ioc->aen_event_read_flag = 0;
1313     return 0;
1314 }
1315
1316 /**
1317  * _ctl_do_reset - main handler for MPT3HARDRESET opcode
1318  * @ioc: per adapter object
1319  * @arg: user space buffer containing ioctl content
1320  */
1321 static long
1322 _ctl_do_reset(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
1323 {
1324     struct mpt3_ioctl_diag_reset karg;
1325     int retval;
1326
1327     if (copy_from_user(&karg, arg, sizeof(karg))) {
1328         pr_err("failure at %s:%d/%s()!\n",
1329             __FILE__, __LINE__, __func__);
1330         return -EFAULT;
1331     }
1332
1333     if (ioc->shost_recovery || ioc->pci_error_recovery ||
1334         ioc->is_driver_loading)
1335         return -EAGAIN;
1336
1337     dctlprintk(ioc, ioc_info(ioc, "%s: enter\n",
1338                  __func__));
1339
1340     ioc->reset_from_user = 1;
1341     retval = mpt3sas_base_hard_reset_handler(ioc, FORCE_BIG_HAMMER);
1342     ioc_info(ioc,
1343         "Ioctl: host reset: %s\n", ((!retval) ? "SUCCESS" : "FAILED"));
1344     return 0;
1345 }
1346
1347 /**
1348  * _ctl_btdh_search_sas_device - searching for sas device
1349  * @ioc: per adapter object
1350  * @btdh: btdh ioctl payload
1351  */
1352 static int
1353 _ctl_btdh_search_sas_device(struct MPT3SAS_ADAPTER *ioc,
1354     struct mpt3_ioctl_btdh_mapping *btdh)
1355 {
1356     struct _sas_device *sas_device;
1357     unsigned long flags;
1358     int rc = 0;
1359
1360     if (list_empty(&ioc->sas_device_list))
1361         return rc;
1362
1363     spin_lock_irqsave(&ioc->sas_device_lock, flags);
1364     list_for_each_entry(sas_device, &ioc->sas_device_list, list) {
1365         if (btdh->bus == 0xFFFFFFFF && btdh->id == 0xFFFFFFFF &&
1366             btdh->handle == sas_device->handle) {
1367             btdh->bus = sas_device->channel;
1368             btdh->id = sas_device->id;
1369             rc = 1;
1370             goto out;
1371         } else if (btdh->bus == sas_device->channel && btdh->id ==
1372             sas_device->id && btdh->handle == 0xFFFF) {
1373             btdh->handle = sas_device->handle;
1374             rc = 1;
1375             goto out;
1376         }
1377     }
1378  out:
1379     spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
1380     return rc;
1381 }
1382
1383 /**
1384  * _ctl_btdh_search_pcie_device - searching for pcie device
1385  * @ioc: per adapter object
1386  * @btdh: btdh ioctl payload
1387  */
1388 static int
1389 _ctl_btdh_search_pcie_device(struct MPT3SAS_ADAPTER *ioc,
1390     struct mpt3_ioctl_btdh_mapping *btdh)
1391 {
1392     struct _pcie_device *pcie_device;
1393     unsigned long flags;
1394     int rc = 0;
1395
1396     if (list_empty(&ioc->pcie_device_list))
1397         return rc;
1398
1399     spin_lock_irqsave(&ioc->pcie_device_lock, flags);
1400     list_for_each_entry(pcie_device, &ioc->pcie_device_list, list) {
1401         if (btdh->bus == 0xFFFFFFFF && btdh->id == 0xFFFFFFFF &&
1402                btdh->handle == pcie_device->handle) {
1403             btdh->bus = pcie_device->channel;
1404             btdh->id = pcie_device->id;
1405             rc = 1;
1406             goto out;
1407         } else if (btdh->bus == pcie_device->channel && btdh->id ==
1408                pcie_device->id && btdh->handle == 0xFFFF) {
1409             btdh->handle = pcie_device->handle;
1410             rc = 1;
1411             goto out;
1412         }
1413     }
1414  out:
1415     spin_unlock_irqrestore(&ioc->pcie_device_lock, flags);
1416     return rc;
1417 }
1418
1419 /**
1420  * _ctl_btdh_search_raid_device - searching for raid device
1421  * @ioc: per adapter object
1422  * @btdh: btdh ioctl payload
1423  */
1424 static int
1425 _ctl_btdh_search_raid_device(struct MPT3SAS_ADAPTER *ioc,
1426     struct mpt3_ioctl_btdh_mapping *btdh)
1427 {
1428     struct _raid_device *raid_device;
1429     unsigned long flags;
1430     int rc = 0;
1431
1432     if (list_empty(&ioc->raid_device_list))
1433         return rc;
1434
1435     spin_lock_irqsave(&ioc->raid_device_lock, flags);
1436     list_for_each_entry(raid_device, &ioc->raid_device_list, list) {
1437         if (btdh->bus == 0xFFFFFFFF && btdh->id == 0xFFFFFFFF &&
1438             btdh->handle == raid_device->handle) {
1439             btdh->bus = raid_device->channel;
1440             btdh->id = raid_device->id;
1441             rc = 1;
1442             goto out;
1443         } else if (btdh->bus == raid_device->channel && btdh->id ==
1444             raid_device->id && btdh->handle == 0xFFFF) {
1445             btdh->handle = raid_device->handle;
1446             rc = 1;
1447             goto out;
1448         }
1449     }
1450  out:
1451     spin_unlock_irqrestore(&ioc->raid_device_lock, flags);
1452     return rc;
1453 }
1454
1455 /**
1456  * _ctl_btdh_mapping - main handler for MPT3BTDHMAPPING opcode
1457  * @ioc: per adapter object
1458  * @arg: user space buffer containing ioctl content
1459  */
1460 static long
1461 _ctl_btdh_mapping(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
1462 {
1463     struct mpt3_ioctl_btdh_mapping karg;
1464     int rc;
1465
1466     if (copy_from_user(&karg, arg, sizeof(karg))) {
1467         pr_err("failure at %s:%d/%s()!\n",
1468             __FILE__, __LINE__, __func__);
1469         return -EFAULT;
1470     }
1471
1472     dctlprintk(ioc, ioc_info(ioc, "%s\n",
1473                  __func__));
1474
1475     rc = _ctl_btdh_search_sas_device(ioc, &karg);
1476     if (!rc)
1477         rc = _ctl_btdh_search_pcie_device(ioc, &karg);
1478     if (!rc)
1479         _ctl_btdh_search_raid_device(ioc, &karg);
1480
1481     if (copy_to_user(arg, &karg, sizeof(karg))) {
1482         pr_err("failure at %s:%d/%s()!\n",
1483             __FILE__, __LINE__, __func__);
1484         return -EFAULT;
1485     }
1486     return 0;
1487 }
1488
1489 /**
1490  * _ctl_diag_capability - return diag buffer capability
1491  * @ioc: per adapter object
1492  * @buffer_type: specifies either TRACE, SNAPSHOT, or EXTENDED
1493  *
1494  * returns 1 when diag buffer support is enabled in firmware
1495  */
1496 static u8
1497 _ctl_diag_capability(struct MPT3SAS_ADAPTER *ioc, u8 buffer_type)
1498 {
1499     u8 rc = 0;
1500
1501     switch (buffer_type) {
1502     case MPI2_DIAG_BUF_TYPE_TRACE:
1503         if (ioc->facts.IOCCapabilities &
1504             MPI2_IOCFACTS_CAPABILITY_DIAG_TRACE_BUFFER)
1505             rc = 1;
1506         break;
1507     case MPI2_DIAG_BUF_TYPE_SNAPSHOT:
1508         if (ioc->facts.IOCCapabilities &
1509             MPI2_IOCFACTS_CAPABILITY_SNAPSHOT_BUFFER)
1510             rc = 1;
1511         break;
1512     case MPI2_DIAG_BUF_TYPE_EXTENDED:
1513         if (ioc->facts.IOCCapabilities &
1514             MPI2_IOCFACTS_CAPABILITY_EXTENDED_BUFFER)
1515             rc = 1;
1516     }
1517
1518     return rc;
1519 }
1520
1521 /**
1522  * _ctl_diag_get_bufftype - return diag buffer type
1523  *              either TRACE, SNAPSHOT, or EXTENDED
1524  * @ioc: per adapter object
1525  * @unique_id: specifies the unique_id for the buffer
1526  *
1527  * returns MPT3_DIAG_UID_NOT_FOUND if the id not found
1528  */
1529 static u8
1530 _ctl_diag_get_bufftype(struct MPT3SAS_ADAPTER *ioc, u32 unique_id)
1531 {
1532     u8  index;
1533
1534     for (index = 0; index < MPI2_DIAG_BUF_TYPE_COUNT; index++) {
1535         if (ioc->unique_id[index] == unique_id)
1536             return index;
1537     }
1538
1539     return MPT3_DIAG_UID_NOT_FOUND;
1540 }
1541
1542 /**
1543  * _ctl_diag_register_2 - wrapper for registering diag buffer support
1544  * @ioc: per adapter object
1545  * @diag_register: the diag_register struct passed in from user space
1546  *
1547  */
1548 static long
1549 _ctl_diag_register_2(struct MPT3SAS_ADAPTER *ioc,
1550     struct mpt3_diag_register *diag_register)
1551 {
1552     int rc, i;
1553     void *request_data = NULL;
1554     dma_addr_t request_data_dma;
1555     u32 request_data_sz = 0;
1556     Mpi2DiagBufferPostRequest_t *mpi_request;
1557     Mpi2DiagBufferPostReply_t *mpi_reply;
1558     u8 buffer_type;
1559     u16 smid;
1560     u16 ioc_status;
1561     u32 ioc_state;
1562     u8 issue_reset = 0;
1563
1564     dctlprintk(ioc, ioc_info(ioc, "%s\n",
1565                  __func__));
1566
1567     ioc_state = mpt3sas_base_get_iocstate(ioc, 1);
1568     if (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {
1569         ioc_err(ioc, "%s: failed due to ioc not operational\n",
1570             __func__);
1571         rc = -EAGAIN;
1572         goto out;
1573     }
1574
1575     if (ioc->ctl_cmds.status != MPT3_CMD_NOT_USED) {
1576         ioc_err(ioc, "%s: ctl_cmd in use\n", __func__);
1577         rc = -EAGAIN;
1578         goto out;
1579     }
1580
1581     buffer_type = diag_register->buffer_type;
1582     if (!_ctl_diag_capability(ioc, buffer_type)) {
1583         ioc_err(ioc, "%s: doesn't have capability for buffer_type(0x%02x)\n",
1584             __func__, buffer_type);
1585         return -EPERM;
1586     }
1587
1588     if (diag_register->unique_id == 0) {
1589         ioc_err(ioc,
1590             "%s: Invalid UID(0x%08x), buffer_type(0x%02x)\n", __func__,
1591             diag_register->unique_id, buffer_type);
1592         return -EINVAL;
1593     }
1594
1595     if ((ioc->diag_buffer_status[buffer_type] &
1596         MPT3_DIAG_BUFFER_IS_APP_OWNED) &&
1597         !(ioc->diag_buffer_status[buffer_type] &
1598         MPT3_DIAG_BUFFER_IS_RELEASED)) {
1599         ioc_err(ioc,
1600             "%s: buffer_type(0x%02x) is already registered by application with UID(0x%08x)\n",
1601             __func__, buffer_type, ioc->unique_id[buffer_type]);
1602         return -EINVAL;
1603     }
1604
1605     if (ioc->diag_buffer_status[buffer_type] &
1606         MPT3_DIAG_BUFFER_IS_REGISTERED) {
1607         /*
1608          * If driver posts buffer initially, then an application wants
1609          * to Register that buffer (own it) without Releasing first,
1610          * the application Register command MUST have the same buffer
1611          * type and size in the Register command (obtained from the
1612          * Query command). Otherwise that Register command will be
1613          * failed. If the application has released the buffer but wants
1614          * to re-register it, it should be allowed as long as the
1615          * Unique-Id/Size match.
1616          */
1617
1618         if (ioc->unique_id[buffer_type] == MPT3DIAGBUFFUNIQUEID &&
1619             ioc->diag_buffer_sz[buffer_type] ==
1620             diag_register->requested_buffer_size) {
1621
1622             if (!(ioc->diag_buffer_status[buffer_type] &
1623                  MPT3_DIAG_BUFFER_IS_RELEASED)) {
1624                 dctlprintk(ioc, ioc_info(ioc,
1625                     "%s: diag_buffer (%d) ownership changed. old-ID(0x%08x), new-ID(0x%08x)\n",
1626                     __func__, buffer_type,
1627                     ioc->unique_id[buffer_type],
1628                     diag_register->unique_id));
1629
1630                 /*
1631                  * Application wants to own the buffer with
1632                  * the same size.
1633                  */
1634                 ioc->unique_id[buffer_type] =
1635                     diag_register->unique_id;
1636                 rc = 0; /* success */
1637                 goto out;
1638             }
1639         } else if (ioc->unique_id[buffer_type] !=
1640             MPT3DIAGBUFFUNIQUEID) {
1641             if (ioc->unique_id[buffer_type] !=
1642                 diag_register->unique_id ||
1643                 ioc->diag_buffer_sz[buffer_type] !=
1644                 diag_register->requested_buffer_size ||
1645                 !(ioc->diag_buffer_status[buffer_type] &
1646                 MPT3_DIAG_BUFFER_IS_RELEASED)) {
1647                 ioc_err(ioc,
1648                     "%s: already has a registered buffer for buffer_type(0x%02x)\n",
1649                     __func__, buffer_type);
1650                 return -EINVAL;
1651             }
1652         } else {
1653             ioc_err(ioc, "%s: already has a registered buffer for buffer_type(0x%02x)\n",
1654                 __func__, buffer_type);
1655             return -EINVAL;
1656         }
1657     } else if (ioc->diag_buffer_status[buffer_type] &
1658         MPT3_DIAG_BUFFER_IS_DRIVER_ALLOCATED) {
1659
1660         if (ioc->unique_id[buffer_type] != MPT3DIAGBUFFUNIQUEID ||
1661             ioc->diag_buffer_sz[buffer_type] !=
1662             diag_register->requested_buffer_size) {
1663
1664             ioc_err(ioc,
1665                 "%s: already a buffer is allocated for buffer_type(0x%02x) of size %d bytes, so please try registering again with same size\n",
1666                  __func__, buffer_type,
1667                 ioc->diag_buffer_sz[buffer_type]);
1668             return -EINVAL;
1669         }
1670     }
1671
1672     if (diag_register->requested_buffer_size % 4)  {
1673         ioc_err(ioc, "%s: the requested_buffer_size is not 4 byte aligned\n",
1674             __func__);
1675         return -EINVAL;
1676     }
1677
1678     smid = mpt3sas_base_get_smid(ioc, ioc->ctl_cb_idx);
1679     if (!smid) {
1680         ioc_err(ioc, "%s: failed obtaining a smid\n", __func__);
1681         rc = -EAGAIN;
1682         goto out;
1683     }
1684
1685     rc = 0;
1686     ioc->ctl_cmds.status = MPT3_CMD_PENDING;
1687     memset(ioc->ctl_cmds.reply, 0, ioc->reply_sz);
1688     mpi_request = mpt3sas_base_get_msg_frame(ioc, smid);
1689     ioc->ctl_cmds.smid = smid;
1690
1691     request_data = ioc->diag_buffer[buffer_type];
1692     request_data_sz = diag_register->requested_buffer_size;
1693     ioc->unique_id[buffer_type] = diag_register->unique_id;
1694     /* Reset ioc variables used for additional query commands */
1695     ioc->reset_from_user = 0;
1696     memset(&ioc->htb_rel, 0, sizeof(struct htb_rel_query));
1697     ioc->diag_buffer_status[buffer_type] &=
1698         MPT3_DIAG_BUFFER_IS_DRIVER_ALLOCATED;
1699     memcpy(ioc->product_specific[buffer_type],
1700         diag_register->product_specific, MPT3_PRODUCT_SPECIFIC_DWORDS);
1701     ioc->diagnostic_flags[buffer_type] = diag_register->diagnostic_flags;
1702
1703     if (request_data) {
1704         request_data_dma = ioc->diag_buffer_dma[buffer_type];
1705         if (request_data_sz != ioc->diag_buffer_sz[buffer_type]) {
1706             dma_free_coherent(&ioc->pdev->dev,
1707                     ioc->diag_buffer_sz[buffer_type],
1708                     request_data, request_data_dma);
1709             request_data = NULL;
1710         }
1711     }
1712
1713     if (request_data == NULL) {
1714         ioc->diag_buffer_sz[buffer_type] = 0;
1715         ioc->diag_buffer_dma[buffer_type] = 0;
1716         request_data = dma_alloc_coherent(&ioc->pdev->dev,
1717                 request_data_sz, &request_data_dma, GFP_KERNEL);
1718         if (request_data == NULL) {
1719             ioc_err(ioc, "%s: failed allocating memory for diag buffers, requested size(%d)\n",
1720                 __func__, request_data_sz);
1721             mpt3sas_base_free_smid(ioc, smid);
1722             rc = -ENOMEM;
1723             goto out;
1724         }
1725         ioc->diag_buffer[buffer_type] = request_data;
1726         ioc->diag_buffer_sz[buffer_type] = request_data_sz;
1727         ioc->diag_buffer_dma[buffer_type] = request_data_dma;
1728     }
1729
1730     mpi_request->Function = MPI2_FUNCTION_DIAG_BUFFER_POST;
1731     mpi_request->BufferType = diag_register->buffer_type;
1732     mpi_request->Flags = cpu_to_le32(diag_register->diagnostic_flags);
1733     mpi_request->BufferAddress = cpu_to_le64(request_data_dma);
1734     mpi_request->BufferLength = cpu_to_le32(request_data_sz);
1735     mpi_request->VF_ID = 0; /* TODO */
1736     mpi_request->VP_ID = 0;
1737
1738     dctlprintk(ioc,
1739            ioc_info(ioc, "%s: diag_buffer(0x%p), dma(0x%llx), sz(%d)\n",
1740                 __func__, request_data,
1741                 (unsigned long long)request_data_dma,
1742                 le32_to_cpu(mpi_request->BufferLength)));
1743
1744     for (i = 0; i < MPT3_PRODUCT_SPECIFIC_DWORDS; i++)
1745         mpi_request->ProductSpecific[i] =
1746             cpu_to_le32(ioc->product_specific[buffer_type][i]);
1747
1748     init_completion(&ioc->ctl_cmds.done);
1749     ioc->put_smid_default(ioc, smid);
1750     wait_for_completion_timeout(&ioc->ctl_cmds.done,
1751         MPT3_IOCTL_DEFAULT_TIMEOUT*HZ);
1752
1753     if (!(ioc->ctl_cmds.status & MPT3_CMD_COMPLETE)) {
1754         mpt3sas_check_cmd_timeout(ioc,
1755             ioc->ctl_cmds.status, mpi_request,
1756             sizeof(Mpi2DiagBufferPostRequest_t)/4, issue_reset);
1757         goto issue_host_reset;
1758     }
1759
1760     /* process the completed Reply Message Frame */
1761     if ((ioc->ctl_cmds.status & MPT3_CMD_REPLY_VALID) == 0) {
1762         ioc_err(ioc, "%s: no reply message\n", __func__);
1763         rc = -EFAULT;
1764         goto out;
1765     }
1766
1767     mpi_reply = ioc->ctl_cmds.reply;
1768     ioc_status = le16_to_cpu(mpi_reply->IOCStatus) & MPI2_IOCSTATUS_MASK;
1769
1770     if (ioc_status == MPI2_IOCSTATUS_SUCCESS) {
1771         ioc->diag_buffer_status[buffer_type] |=
1772             MPT3_DIAG_BUFFER_IS_REGISTERED;
1773         dctlprintk(ioc, ioc_info(ioc, "%s: success\n", __func__));
1774     } else {
1775         ioc_info(ioc, "%s: ioc_status(0x%04x) log_info(0x%08x)\n",
1776              __func__,
1777              ioc_status, le32_to_cpu(mpi_reply->IOCLogInfo));
1778         rc = -EFAULT;
1779     }
1780
1781  issue_host_reset:
1782     if (issue_reset)
1783         mpt3sas_base_hard_reset_handler(ioc, FORCE_BIG_HAMMER);
1784
1785  out:
1786
1787     if (rc && request_data) {
1788         dma_free_coherent(&ioc->pdev->dev, request_data_sz,
1789             request_data, request_data_dma);
1790         ioc->diag_buffer_status[buffer_type] &=
1791             ~MPT3_DIAG_BUFFER_IS_DRIVER_ALLOCATED;
1792     }
1793
1794     ioc->ctl_cmds.status = MPT3_CMD_NOT_USED;
1795     return rc;
1796 }
1797
1798 /**
1799  * mpt3sas_enable_diag_buffer - enabling diag_buffers support driver load time
1800  * @ioc: per adapter object
1801  * @bits_to_register: bitwise field where trace is bit 0, and snapshot is bit 1
1802  *
1803  * This is called when command line option diag_buffer_enable is enabled
1804  * at driver load time.
1805  */
1806 void
1807 mpt3sas_enable_diag_buffer(struct MPT3SAS_ADAPTER *ioc, u8 bits_to_register)
1808 {
1809     struct mpt3_diag_register diag_register;
1810     u32 ret_val;
1811     u32 trace_buff_size = ioc->manu_pg11.HostTraceBufferMaxSizeKB<<10;
1812     u32 min_trace_buff_size = 0;
1813     u32 decr_trace_buff_size = 0;
1814
1815     memset(&diag_register, 0, sizeof(struct mpt3_diag_register));
1816
1817     if (bits_to_register & 1) {
1818         ioc_info(ioc, "registering trace buffer support\n");
1819         ioc->diag_trigger_master.MasterData =
1820             (MASTER_TRIGGER_FW_FAULT + MASTER_TRIGGER_ADAPTER_RESET);
1821         diag_register.buffer_type = MPI2_DIAG_BUF_TYPE_TRACE;
1822         diag_register.unique_id =
1823             (ioc->hba_mpi_version_belonged == MPI2_VERSION) ?
1824             (MPT2DIAGBUFFUNIQUEID):(MPT3DIAGBUFFUNIQUEID);
1825
1826         if (trace_buff_size != 0) {
1827             diag_register.requested_buffer_size = trace_buff_size;
1828             min_trace_buff_size =
1829                 ioc->manu_pg11.HostTraceBufferMinSizeKB<<10;
1830             decr_trace_buff_size =
1831                 ioc->manu_pg11.HostTraceBufferDecrementSizeKB<<10;
1832
1833             if (min_trace_buff_size > trace_buff_size) {
1834                 /* The buff size is not set correctly */
1835                 ioc_err(ioc,
1836                     "Min Trace Buff size (%d KB) greater than Max Trace Buff size (%d KB)\n",
1837                      min_trace_buff_size>>10,
1838                      trace_buff_size>>10);
1839                 ioc_err(ioc,
1840                     "Using zero Min Trace Buff Size\n");
1841                 min_trace_buff_size = 0;
1842             }
1843
1844             if (decr_trace_buff_size == 0) {
1845                 /*
1846                  * retry the min size if decrement
1847                  * is not available.
1848                  */
1849                 decr_trace_buff_size =
1850                     trace_buff_size - min_trace_buff_size;
1851             }
1852         } else {
1853             /* register for 2MB buffers  */
1854             diag_register.requested_buffer_size = 2 * (1024 * 1024);
1855         }
1856
1857         do {
1858             ret_val = _ctl_diag_register_2(ioc,  &diag_register);
1859
1860             if (ret_val == -ENOMEM && min_trace_buff_size &&
1861                 (trace_buff_size - decr_trace_buff_size) >=
1862                 min_trace_buff_size) {
1863                 /* adjust the buffer size */
1864                 trace_buff_size -= decr_trace_buff_size;
1865                 diag_register.requested_buffer_size =
1866                     trace_buff_size;
1867             } else
1868                 break;
1869         } while (true);
1870
1871         if (ret_val == -ENOMEM)
1872             ioc_err(ioc,
1873                 "Cannot allocate trace buffer memory. Last memory tried = %d KB\n",
1874                 diag_register.requested_buffer_size>>10);
1875         else if (ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE]
1876             & MPT3_DIAG_BUFFER_IS_REGISTERED) {
1877             ioc_err(ioc, "Trace buffer memory %d KB allocated\n",
1878                 diag_register.requested_buffer_size>>10);
1879             if (ioc->hba_mpi_version_belonged != MPI2_VERSION)
1880                 ioc->diag_buffer_status[
1881                     MPI2_DIAG_BUF_TYPE_TRACE] |=
1882                     MPT3_DIAG_BUFFER_IS_DRIVER_ALLOCATED;
1883         }
1884     }
1885
1886     if (bits_to_register & 2) {
1887         ioc_info(ioc, "registering snapshot buffer support\n");
1888         diag_register.buffer_type = MPI2_DIAG_BUF_TYPE_SNAPSHOT;
1889         /* register for 2MB buffers  */
1890         diag_register.requested_buffer_size = 2 * (1024 * 1024);
1891         diag_register.unique_id = 0x7075901;
1892         _ctl_diag_register_2(ioc,  &diag_register);
1893     }
1894
1895     if (bits_to_register & 4) {
1896         ioc_info(ioc, "registering extended buffer support\n");
1897         diag_register.buffer_type = MPI2_DIAG_BUF_TYPE_EXTENDED;
1898         /* register for 2MB buffers  */
1899         diag_register.requested_buffer_size = 2 * (1024 * 1024);
1900         diag_register.unique_id = 0x7075901;
1901         _ctl_diag_register_2(ioc,  &diag_register);
1902     }
1903 }
1904
1905 /**
1906  * _ctl_diag_register - application register with driver
1907  * @ioc: per adapter object
1908  * @arg: user space buffer containing ioctl content
1909  *
1910  * This will allow the driver to setup any required buffers that will be
1911  * needed by firmware to communicate with the driver.
1912  */
1913 static long
1914 _ctl_diag_register(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
1915 {
1916     struct mpt3_diag_register karg;
1917     long rc;
1918
1919     if (copy_from_user(&karg, arg, sizeof(karg))) {
1920         pr_err("failure at %s:%d/%s()!\n",
1921             __FILE__, __LINE__, __func__);
1922         return -EFAULT;
1923     }
1924
1925     rc = _ctl_diag_register_2(ioc, &karg);
1926
1927     if (!rc && (ioc->diag_buffer_status[karg.buffer_type] &
1928         MPT3_DIAG_BUFFER_IS_REGISTERED))
1929         ioc->diag_buffer_status[karg.buffer_type] |=
1930             MPT3_DIAG_BUFFER_IS_APP_OWNED;
1931
1932     return rc;
1933 }
1934
1935 /**
1936  * _ctl_diag_unregister - application unregister with driver
1937  * @ioc: per adapter object
1938  * @arg: user space buffer containing ioctl content
1939  *
1940  * This will allow the driver to cleanup any memory allocated for diag
1941  * messages and to free up any resources.
1942  */
1943 static long
1944 _ctl_diag_unregister(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
1945 {
1946     struct mpt3_diag_unregister karg;
1947     void *request_data;
1948     dma_addr_t request_data_dma;
1949     u32 request_data_sz;
1950     u8 buffer_type;
1951
1952     if (copy_from_user(&karg, arg, sizeof(karg))) {
1953         pr_err("failure at %s:%d/%s()!\n",
1954             __FILE__, __LINE__, __func__);
1955         return -EFAULT;
1956     }
1957
1958     dctlprintk(ioc, ioc_info(ioc, "%s\n",
1959                  __func__));
1960
1961     buffer_type = _ctl_diag_get_bufftype(ioc, karg.unique_id);
1962     if (buffer_type == MPT3_DIAG_UID_NOT_FOUND) {
1963         ioc_err(ioc, "%s: buffer with unique_id(0x%08x) not found\n",
1964             __func__, karg.unique_id);
1965         return -EINVAL;
1966     }
1967
1968     if (!_ctl_diag_capability(ioc, buffer_type)) {
1969         ioc_err(ioc, "%s: doesn't have capability for buffer_type(0x%02x)\n",
1970             __func__, buffer_type);
1971         return -EPERM;
1972     }
1973
1974     if ((ioc->diag_buffer_status[buffer_type] &
1975         MPT3_DIAG_BUFFER_IS_REGISTERED) == 0) {
1976         ioc_err(ioc, "%s: buffer_type(0x%02x) is not registered\n",
1977             __func__, buffer_type);
1978         return -EINVAL;
1979     }
1980     if ((ioc->diag_buffer_status[buffer_type] &
1981         MPT3_DIAG_BUFFER_IS_RELEASED) == 0) {
1982         ioc_err(ioc, "%s: buffer_type(0x%02x) has not been released\n",
1983             __func__, buffer_type);
1984         return -EINVAL;
1985     }
1986
1987     if (karg.unique_id != ioc->unique_id[buffer_type]) {
1988         ioc_err(ioc, "%s: unique_id(0x%08x) is not registered\n",
1989             __func__, karg.unique_id);
1990         return -EINVAL;
1991     }
1992
1993     request_data = ioc->diag_buffer[buffer_type];
1994     if (!request_data) {
1995         ioc_err(ioc, "%s: doesn't have memory allocated for buffer_type(0x%02x)\n",
1996             __func__, buffer_type);
1997         return -ENOMEM;
1998     }
1999
2000     if (ioc->diag_buffer_status[buffer_type] &
2001         MPT3_DIAG_BUFFER_IS_DRIVER_ALLOCATED) {
2002         ioc->unique_id[buffer_type] = MPT3DIAGBUFFUNIQUEID;
2003         ioc->diag_buffer_status[buffer_type] &=
2004             ~MPT3_DIAG_BUFFER_IS_APP_OWNED;
2005         ioc->diag_buffer_status[buffer_type] &=
2006             ~MPT3_DIAG_BUFFER_IS_REGISTERED;
2007     } else {
2008         request_data_sz = ioc->diag_buffer_sz[buffer_type];
2009         request_data_dma = ioc->diag_buffer_dma[buffer_type];
2010         dma_free_coherent(&ioc->pdev->dev, request_data_sz,
2011                 request_data, request_data_dma);
2012         ioc->diag_buffer[buffer_type] = NULL;
2013         ioc->diag_buffer_status[buffer_type] = 0;
2014     }
2015     return 0;
2016 }
2017
2018 /**
2019  * _ctl_diag_query - query relevant info associated with diag buffers
2020  * @ioc: per adapter object
2021  * @arg: user space buffer containing ioctl content
2022  *
2023  * The application will send only buffer_type and unique_id.  Driver will
2024  * inspect unique_id first, if valid, fill in all the info.  If unique_id is
2025  * 0x00, the driver will return info specified by Buffer Type.
2026  */
2027 static long
2028 _ctl_diag_query(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
2029 {
2030     struct mpt3_diag_query karg;
2031     void *request_data;
2032     int i;
2033     u8 buffer_type;
2034
2035     if (copy_from_user(&karg, arg, sizeof(karg))) {
2036         pr_err("failure at %s:%d/%s()!\n",
2037             __FILE__, __LINE__, __func__);
2038         return -EFAULT;
2039     }
2040
2041     dctlprintk(ioc, ioc_info(ioc, "%s\n",
2042                  __func__));
2043
2044     karg.application_flags = 0;
2045     buffer_type = karg.buffer_type;
2046
2047     if (!_ctl_diag_capability(ioc, buffer_type)) {
2048         ioc_err(ioc, "%s: doesn't have capability for buffer_type(0x%02x)\n",
2049             __func__, buffer_type);
2050         return -EPERM;
2051     }
2052
2053     if (!(ioc->diag_buffer_status[buffer_type] &
2054         MPT3_DIAG_BUFFER_IS_DRIVER_ALLOCATED)) {
2055         if ((ioc->diag_buffer_status[buffer_type] &
2056             MPT3_DIAG_BUFFER_IS_REGISTERED) == 0) {
2057             ioc_err(ioc, "%s: buffer_type(0x%02x) is not registered\n",
2058                 __func__, buffer_type);
2059             return -EINVAL;
2060         }
2061     }
2062
2063     if (karg.unique_id) {
2064         if (karg.unique_id != ioc->unique_id[buffer_type]) {
2065             ioc_err(ioc, "%s: unique_id(0x%08x) is not registered\n",
2066                 __func__, karg.unique_id);
2067             return -EINVAL;
2068         }
2069     }
2070
2071     request_data = ioc->diag_buffer[buffer_type];
2072     if (!request_data) {
2073         ioc_err(ioc, "%s: doesn't have buffer for buffer_type(0x%02x)\n",
2074             __func__, buffer_type);
2075         return -ENOMEM;
2076     }
2077
2078     if ((ioc->diag_buffer_status[buffer_type] &
2079         MPT3_DIAG_BUFFER_IS_REGISTERED))
2080         karg.application_flags |= MPT3_APP_FLAGS_BUFFER_VALID;
2081
2082     if (!(ioc->diag_buffer_status[buffer_type] &
2083          MPT3_DIAG_BUFFER_IS_RELEASED))
2084         karg.application_flags |= MPT3_APP_FLAGS_FW_BUFFER_ACCESS;
2085
2086     if (!(ioc->diag_buffer_status[buffer_type] &
2087         MPT3_DIAG_BUFFER_IS_DRIVER_ALLOCATED))
2088         karg.application_flags |= MPT3_APP_FLAGS_DYNAMIC_BUFFER_ALLOC;
2089
2090     if ((ioc->diag_buffer_status[buffer_type] &
2091         MPT3_DIAG_BUFFER_IS_APP_OWNED))
2092         karg.application_flags |= MPT3_APP_FLAGS_APP_OWNED;
2093
2094     for (i = 0; i < MPT3_PRODUCT_SPECIFIC_DWORDS; i++)
2095         karg.product_specific[i] =
2096             ioc->product_specific[buffer_type][i];
2097
2098     karg.total_buffer_size = ioc->diag_buffer_sz[buffer_type];
2099     karg.driver_added_buffer_size = 0;
2100     karg.unique_id = ioc->unique_id[buffer_type];
2101     karg.diagnostic_flags = ioc->diagnostic_flags[buffer_type];
2102
2103     if (copy_to_user(arg, &karg, sizeof(struct mpt3_diag_query))) {
2104         ioc_err(ioc, "%s: unable to write mpt3_diag_query data @ %p\n",
2105             __func__, arg);
2106         return -EFAULT;
2107     }
2108     return 0;
2109 }
2110
2111 /**
2112  * mpt3sas_send_diag_release - Diag Release Message
2113  * @ioc: per adapter object
2114  * @buffer_type: specifies either TRACE, SNAPSHOT, or EXTENDED
2115  * @issue_reset: specifies whether host reset is required.
2116  *
2117  */
2118 int
2119 mpt3sas_send_diag_release(struct MPT3SAS_ADAPTER *ioc, u8 buffer_type,
2120     u8 *issue_reset)
2121 {
2122     Mpi2DiagReleaseRequest_t *mpi_request;
2123     Mpi2DiagReleaseReply_t *mpi_reply;
2124     u16 smid;
2125     u16 ioc_status;
2126     u32 ioc_state;
2127     int rc;
2128     u8 reset_needed = 0;
2129
2130     dctlprintk(ioc, ioc_info(ioc, "%s\n",
2131                  __func__));
2132
2133     rc = 0;
2134     *issue_reset = 0;
2135
2136
2137     ioc_state = mpt3sas_base_get_iocstate(ioc, 1);
2138     if (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {
2139         if (ioc->diag_buffer_status[buffer_type] &
2140             MPT3_DIAG_BUFFER_IS_REGISTERED)
2141             ioc->diag_buffer_status[buffer_type] |=
2142                 MPT3_DIAG_BUFFER_IS_RELEASED;
2143         dctlprintk(ioc,
2144                ioc_info(ioc, "%s: skipping due to FAULT state\n",
2145                     __func__));
2146         rc = -EAGAIN;
2147         goto out;
2148     }
2149
2150     if (ioc->ctl_cmds.status != MPT3_CMD_NOT_USED) {
2151         ioc_err(ioc, "%s: ctl_cmd in use\n", __func__);
2152         rc = -EAGAIN;
2153         goto out;
2154     }
2155
2156     smid = mpt3sas_base_get_smid(ioc, ioc->ctl_cb_idx);
2157     if (!smid) {
2158         ioc_err(ioc, "%s: failed obtaining a smid\n", __func__);
2159         rc = -EAGAIN;
2160         goto out;
2161     }
2162
2163     ioc->ctl_cmds.status = MPT3_CMD_PENDING;
2164     memset(ioc->ctl_cmds.reply, 0, ioc->reply_sz);
2165     mpi_request = mpt3sas_base_get_msg_frame(ioc, smid);
2166     ioc->ctl_cmds.smid = smid;
2167
2168     mpi_request->Function = MPI2_FUNCTION_DIAG_RELEASE;
2169     mpi_request->BufferType = buffer_type;
2170     mpi_request->VF_ID = 0; /* TODO */
2171     mpi_request->VP_ID = 0;
2172
2173     init_completion(&ioc->ctl_cmds.done);
2174     ioc->put_smid_default(ioc, smid);
2175     wait_for_completion_timeout(&ioc->ctl_cmds.done,
2176         MPT3_IOCTL_DEFAULT_TIMEOUT*HZ);
2177
2178     if (!(ioc->ctl_cmds.status & MPT3_CMD_COMPLETE)) {
2179         mpt3sas_check_cmd_timeout(ioc,
2180             ioc->ctl_cmds.status, mpi_request,
2181             sizeof(Mpi2DiagReleaseRequest_t)/4, reset_needed);
2182         *issue_reset = reset_needed;
2183         rc = -EFAULT;
2184         goto out;
2185     }
2186
2187     /* process the completed Reply Message Frame */
2188     if ((ioc->ctl_cmds.status & MPT3_CMD_REPLY_VALID) == 0) {
2189         ioc_err(ioc, "%s: no reply message\n", __func__);
2190         rc = -EFAULT;
2191         goto out;
2192     }
2193
2194     mpi_reply = ioc->ctl_cmds.reply;
2195     ioc_status = le16_to_cpu(mpi_reply->IOCStatus) & MPI2_IOCSTATUS_MASK;
2196
2197     if (ioc_status == MPI2_IOCSTATUS_SUCCESS) {
2198         ioc->diag_buffer_status[buffer_type] |=
2199             MPT3_DIAG_BUFFER_IS_RELEASED;
2200         dctlprintk(ioc, ioc_info(ioc, "%s: success\n", __func__));
2201     } else {
2202         ioc_info(ioc, "%s: ioc_status(0x%04x) log_info(0x%08x)\n",
2203              __func__,
2204              ioc_status, le32_to_cpu(mpi_reply->IOCLogInfo));
2205         rc = -EFAULT;
2206     }
2207
2208  out:
2209     ioc->ctl_cmds.status = MPT3_CMD_NOT_USED;
2210     return rc;
2211 }
2212
2213 /**
2214  * _ctl_diag_release - request to send Diag Release Message to firmware
2215  * @ioc: ?
2216  * @arg: user space buffer containing ioctl content
2217  *
2218  * This allows ownership of the specified buffer to returned to the driver,
2219  * allowing an application to read the buffer without fear that firmware is
2220  * overwriting information in the buffer.
2221  */
2222 static long
2223 _ctl_diag_release(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
2224 {
2225     struct mpt3_diag_release karg;
2226     void *request_data;
2227     int rc;
2228     u8 buffer_type;
2229     u8 issue_reset = 0;
2230
2231     if (copy_from_user(&karg, arg, sizeof(karg))) {
2232         pr_err("failure at %s:%d/%s()!\n",
2233             __FILE__, __LINE__, __func__);
2234         return -EFAULT;
2235     }
2236
2237     dctlprintk(ioc, ioc_info(ioc, "%s\n",
2238                  __func__));
2239
2240     buffer_type = _ctl_diag_get_bufftype(ioc, karg.unique_id);
2241     if (buffer_type == MPT3_DIAG_UID_NOT_FOUND) {
2242         ioc_err(ioc, "%s: buffer with unique_id(0x%08x) not found\n",
2243             __func__, karg.unique_id);
2244         return -EINVAL;
2245     }
2246
2247     if (!_ctl_diag_capability(ioc, buffer_type)) {
2248         ioc_err(ioc, "%s: doesn't have capability for buffer_type(0x%02x)\n",
2249             __func__, buffer_type);
2250         return -EPERM;
2251     }
2252
2253     if ((ioc->diag_buffer_status[buffer_type] &
2254         MPT3_DIAG_BUFFER_IS_REGISTERED) == 0) {
2255         ioc_err(ioc, "%s: buffer_type(0x%02x) is not registered\n",
2256             __func__, buffer_type);
2257         return -EINVAL;
2258     }
2259
2260     if (karg.unique_id != ioc->unique_id[buffer_type]) {
2261         ioc_err(ioc, "%s: unique_id(0x%08x) is not registered\n",
2262             __func__, karg.unique_id);
2263         return -EINVAL;
2264     }
2265
2266     if (ioc->diag_buffer_status[buffer_type] &
2267         MPT3_DIAG_BUFFER_IS_RELEASED) {
2268         ioc_err(ioc, "%s: buffer_type(0x%02x) is already released\n",
2269             __func__, buffer_type);
2270         return -EINVAL;
2271     }
2272
2273     request_data = ioc->diag_buffer[buffer_type];
2274
2275     if (!request_data) {
2276         ioc_err(ioc, "%s: doesn't have memory allocated for buffer_type(0x%02x)\n",
2277             __func__, buffer_type);
2278         return -ENOMEM;
2279     }
2280
2281     /* buffers were released by due to host reset */
2282     if ((ioc->diag_buffer_status[buffer_type] &
2283         MPT3_DIAG_BUFFER_IS_DIAG_RESET)) {
2284         ioc->diag_buffer_status[buffer_type] |=
2285             MPT3_DIAG_BUFFER_IS_RELEASED;
2286         ioc->diag_buffer_status[buffer_type] &=
2287             ~MPT3_DIAG_BUFFER_IS_DIAG_RESET;
2288         ioc_err(ioc, "%s: buffer_type(0x%02x) was released due to host reset\n",
2289             __func__, buffer_type);
2290         return 0;
2291     }
2292
2293     rc = mpt3sas_send_diag_release(ioc, buffer_type, &issue_reset);
2294
2295     if (issue_reset)
2296         mpt3sas_base_hard_reset_handler(ioc, FORCE_BIG_HAMMER);
2297
2298     return rc;
2299 }
2300
2301 /**
2302  * _ctl_diag_read_buffer - request for copy of the diag buffer
2303  * @ioc: per adapter object
2304  * @arg: user space buffer containing ioctl content
2305  */
2306 static long
2307 _ctl_diag_read_buffer(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
2308 {
2309     struct mpt3_diag_read_buffer karg;
2310     struct mpt3_diag_read_buffer __user *uarg = arg;
2311     void *request_data, *diag_data;
2312     Mpi2DiagBufferPostRequest_t *mpi_request;
2313     Mpi2DiagBufferPostReply_t *mpi_reply;
2314     int rc, i;
2315     u8 buffer_type;
2316     unsigned long request_size, copy_size;
2317     u16 smid;
2318     u16 ioc_status;
2319     u8 issue_reset = 0;
2320
2321     if (copy_from_user(&karg, arg, sizeof(karg))) {
2322         pr_err("failure at %s:%d/%s()!\n",
2323             __FILE__, __LINE__, __func__);
2324         return -EFAULT;
2325     }
2326
2327     dctlprintk(ioc, ioc_info(ioc, "%s\n",
2328                  __func__));
2329
2330     buffer_type = _ctl_diag_get_bufftype(ioc, karg.unique_id);
2331     if (buffer_type == MPT3_DIAG_UID_NOT_FOUND) {
2332         ioc_err(ioc, "%s: buffer with unique_id(0x%08x) not found\n",
2333             __func__, karg.unique_id);
2334         return -EINVAL;
2335     }
2336
2337     if (!_ctl_diag_capability(ioc, buffer_type)) {
2338         ioc_err(ioc, "%s: doesn't have capability for buffer_type(0x%02x)\n",
2339             __func__, buffer_type);
2340         return -EPERM;
2341     }
2342
2343     if (karg.unique_id != ioc->unique_id[buffer_type]) {
2344         ioc_err(ioc, "%s: unique_id(0x%08x) is not registered\n",
2345             __func__, karg.unique_id);
2346         return -EINVAL;
2347     }
2348
2349     request_data = ioc->diag_buffer[buffer_type];
2350     if (!request_data) {
2351         ioc_err(ioc, "%s: doesn't have buffer for buffer_type(0x%02x)\n",
2352             __func__, buffer_type);
2353         return -ENOMEM;
2354     }
2355
2356     request_size = ioc->diag_buffer_sz[buffer_type];
2357
2358     if ((karg.starting_offset % 4) || (karg.bytes_to_read % 4)) {
2359         ioc_err(ioc, "%s: either the starting_offset or bytes_to_read are not 4 byte aligned\n",
2360             __func__);
2361         return -EINVAL;
2362     }
2363
2364     if (karg.starting_offset > request_size)
2365         return -EINVAL;
2366
2367     diag_data = (void *)(request_data + karg.starting_offset);
2368     dctlprintk(ioc,
2369            ioc_info(ioc, "%s: diag_buffer(%p), offset(%d), sz(%d)\n",
2370                 __func__, diag_data, karg.starting_offset,
2371                 karg.bytes_to_read));
2372
2373     /* Truncate data on requests that are too large */
2374     if ((diag_data + karg.bytes_to_read < diag_data) ||
2375         (diag_data + karg.bytes_to_read > request_data + request_size))
2376         copy_size = request_size - karg.starting_offset;
2377     else
2378         copy_size = karg.bytes_to_read;
2379
2380     if (copy_to_user((void __user *)uarg->diagnostic_data,
2381         diag_data, copy_size)) {
2382         ioc_err(ioc, "%s: Unable to write mpt_diag_read_buffer_t data @ %p\n",
2383             __func__, diag_data);
2384         return -EFAULT;
2385     }
2386
2387     if ((karg.flags & MPT3_FLAGS_REREGISTER) == 0)
2388         return 0;
2389
2390     dctlprintk(ioc,
2391            ioc_info(ioc, "%s: Reregister buffer_type(0x%02x)\n",
2392                 __func__, buffer_type));
2393     if ((ioc->diag_buffer_status[buffer_type] &
2394         MPT3_DIAG_BUFFER_IS_RELEASED) == 0) {
2395         dctlprintk(ioc,
2396                ioc_info(ioc, "%s: buffer_type(0x%02x) is still registered\n",
2397                     __func__, buffer_type));
2398         return 0;
2399     }
2400     /* Get a free request frame and save the message context.
2401     */
2402
2403     if (ioc->ctl_cmds.status != MPT3_CMD_NOT_USED) {
2404         ioc_err(ioc, "%s: ctl_cmd in use\n", __func__);
2405         rc = -EAGAIN;
2406         goto out;
2407     }
2408
2409     smid = mpt3sas_base_get_smid(ioc, ioc->ctl_cb_idx);
2410     if (!smid) {
2411         ioc_err(ioc, "%s: failed obtaining a smid\n", __func__);
2412         rc = -EAGAIN;
2413         goto out;
2414     }
2415
2416     rc = 0;
2417     ioc->ctl_cmds.status = MPT3_CMD_PENDING;
2418     memset(ioc->ctl_cmds.reply, 0, ioc->reply_sz);
2419     mpi_request = mpt3sas_base_get_msg_frame(ioc, smid);
2420     ioc->ctl_cmds.smid = smid;
2421
2422     mpi_request->Function = MPI2_FUNCTION_DIAG_BUFFER_POST;
2423     mpi_request->BufferType = buffer_type;
2424     mpi_request->BufferLength =
2425         cpu_to_le32(ioc->diag_buffer_sz[buffer_type]);
2426     mpi_request->BufferAddress =
2427         cpu_to_le64(ioc->diag_buffer_dma[buffer_type]);
2428     for (i = 0; i < MPT3_PRODUCT_SPECIFIC_DWORDS; i++)
2429         mpi_request->ProductSpecific[i] =
2430             cpu_to_le32(ioc->product_specific[buffer_type][i]);
2431     mpi_request->VF_ID = 0; /* TODO */
2432     mpi_request->VP_ID = 0;
2433
2434     init_completion(&ioc->ctl_cmds.done);
2435     ioc->put_smid_default(ioc, smid);
2436     wait_for_completion_timeout(&ioc->ctl_cmds.done,
2437         MPT3_IOCTL_DEFAULT_TIMEOUT*HZ);
2438
2439     if (!(ioc->ctl_cmds.status & MPT3_CMD_COMPLETE)) {
2440         mpt3sas_check_cmd_timeout(ioc,
2441             ioc->ctl_cmds.status, mpi_request,
2442             sizeof(Mpi2DiagBufferPostRequest_t)/4, issue_reset);
2443         goto issue_host_reset;
2444     }
2445
2446     /* process the completed Reply Message Frame */
2447     if ((ioc->ctl_cmds.status & MPT3_CMD_REPLY_VALID) == 0) {
2448         ioc_err(ioc, "%s: no reply message\n", __func__);
2449         rc = -EFAULT;
2450         goto out;
2451     }
2452
2453     mpi_reply = ioc->ctl_cmds.reply;
2454     ioc_status = le16_to_cpu(mpi_reply->IOCStatus) & MPI2_IOCSTATUS_MASK;
2455
2456     if (ioc_status == MPI2_IOCSTATUS_SUCCESS) {
2457         ioc->diag_buffer_status[buffer_type] |=
2458             MPT3_DIAG_BUFFER_IS_REGISTERED;
2459         ioc->diag_buffer_status[buffer_type] &=
2460             ~MPT3_DIAG_BUFFER_IS_RELEASED;
2461         dctlprintk(ioc, ioc_info(ioc, "%s: success\n", __func__));
2462     } else {
2463         ioc_info(ioc, "%s: ioc_status(0x%04x) log_info(0x%08x)\n",
2464              __func__, ioc_status,
2465              le32_to_cpu(mpi_reply->IOCLogInfo));
2466         rc = -EFAULT;
2467     }
2468
2469  issue_host_reset:
2470     if (issue_reset)
2471         mpt3sas_base_hard_reset_handler(ioc, FORCE_BIG_HAMMER);
2472
2473  out:
2474
2475     ioc->ctl_cmds.status = MPT3_CMD_NOT_USED;
2476     return rc;
2477 }
2478
2479 /**
2480  * _ctl_addnl_diag_query - query relevant info associated with diag buffers
2481  * @ioc: per adapter object
2482  * @arg: user space buffer containing ioctl content
2483  *
2484  * The application will send only unique_id.  Driver will
2485  * inspect unique_id first, if valid, fill the details related to cause
2486  * for diag buffer release.
2487  */
2488 static long
2489 _ctl_addnl_diag_query(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
2490 {
2491     struct mpt3_addnl_diag_query karg;
2492     u32 buffer_type = 0;
2493
2494     if (copy_from_user(&karg, arg, sizeof(karg))) {
2495         pr_err("%s: failure at %s:%d/%s()!\n",
2496             ioc->name, __FILE__, __LINE__, __func__);
2497         return -EFAULT;
2498     }
2499     dctlprintk(ioc, ioc_info(ioc, "%s\n",  __func__));
2500     if (karg.unique_id == 0) {
2501         ioc_err(ioc, "%s: unique_id is(0x%08x)\n",
2502             __func__, karg.unique_id);
2503         return -EPERM;
2504     }
2505     buffer_type = _ctl_diag_get_bufftype(ioc, karg.unique_id);
2506     if (buffer_type == MPT3_DIAG_UID_NOT_FOUND) {
2507         ioc_err(ioc, "%s: buffer with unique_id(0x%08x) not found\n",
2508             __func__, karg.unique_id);
2509         return -EPERM;
2510     }
2511     memset(&karg.rel_query, 0, sizeof(karg.rel_query));
2512     if ((ioc->diag_buffer_status[buffer_type] &
2513         MPT3_DIAG_BUFFER_IS_REGISTERED) == 0) {
2514         ioc_info(ioc, "%s: buffer_type(0x%02x) is not registered\n",
2515             __func__, buffer_type);
2516         goto out;
2517     }
2518     if ((ioc->diag_buffer_status[buffer_type] &
2519         MPT3_DIAG_BUFFER_IS_RELEASED) == 0) {
2520         ioc_err(ioc, "%s: buffer_type(0x%02x) is not released\n",
2521             __func__, buffer_type);
2522         return -EPERM;
2523     }
2524     memcpy(&karg.rel_query, &ioc->htb_rel, sizeof(karg.rel_query));
2525 out:
2526     if (copy_to_user(arg, &karg, sizeof(struct mpt3_addnl_diag_query))) {
2527         ioc_err(ioc, "%s: unable to write mpt3_addnl_diag_query data @ %p\n",
2528             __func__, arg);
2529         return -EFAULT;
2530     }
2531     return 0;
2532 }
2533
2534 #ifdef CONFIG_COMPAT
2535 /**
2536  * _ctl_compat_mpt_command - convert 32bit pointers to 64bit.
2537  * @ioc: per adapter object
2538  * @cmd: ioctl opcode
2539  * @arg: (struct mpt3_ioctl_command32)
2540  *
2541  * MPT3COMMAND32 - Handle 32bit applications running on 64bit os.
2542  */
2543 static long
2544 _ctl_compat_mpt_command(struct MPT3SAS_ADAPTER *ioc, unsigned cmd,
2545     void __user *arg)
2546 {
2547     struct mpt3_ioctl_command32 karg32;
2548     struct mpt3_ioctl_command32 __user *uarg;
2549     struct mpt3_ioctl_command karg;
2550
2551     if (_IOC_SIZE(cmd) != sizeof(struct mpt3_ioctl_command32))
2552         return -EINVAL;
2553
2554     uarg = (struct mpt3_ioctl_command32 __user *) arg;
2555
2556     if (copy_from_user(&karg32, (char __user *)arg, sizeof(karg32))) {
2557         pr_err("failure at %s:%d/%s()!\n",
2558             __FILE__, __LINE__, __func__);
2559         return -EFAULT;
2560     }
2561
2562     memset(&karg, 0, sizeof(struct mpt3_ioctl_command));
2563     karg.hdr.ioc_number = karg32.hdr.ioc_number;
2564     karg.hdr.port_number = karg32.hdr.port_number;
2565     karg.hdr.max_data_size = karg32.hdr.max_data_size;
2566     karg.timeout = karg32.timeout;
2567     karg.max_reply_bytes = karg32.max_reply_bytes;
2568     karg.data_in_size = karg32.data_in_size;
2569     karg.data_out_size = karg32.data_out_size;
2570     karg.max_sense_bytes = karg32.max_sense_bytes;
2571     karg.data_sge_offset = karg32.data_sge_offset;
2572     karg.reply_frame_buf_ptr = compat_ptr(karg32.reply_frame_buf_ptr);
2573     karg.data_in_buf_ptr = compat_ptr(karg32.data_in_buf_ptr);
2574     karg.data_out_buf_ptr = compat_ptr(karg32.data_out_buf_ptr);
2575     karg.sense_data_ptr = compat_ptr(karg32.sense_data_ptr);
2576     return _ctl_do_mpt_command(ioc, karg, &uarg->mf);
2577 }
2578 #endif
2579
2580 /**
2581  * _ctl_ioctl_main - main ioctl entry point
2582  * @file:  (struct file)
2583  * @cmd:  ioctl opcode
2584  * @arg:  user space data buffer
2585  * @compat:  handles 32 bit applications in 64bit os
2586  * @mpi_version: will be MPI2_VERSION for mpt2ctl ioctl device &
2587  * MPI25_VERSION | MPI26_VERSION for mpt3ctl ioctl device.
2588  */
2589 static long
2590 _ctl_ioctl_main(struct file *file, unsigned int cmd, void __user *arg,
2591     u8 compat, u16 mpi_version)
2592 {
2593     struct MPT3SAS_ADAPTER *ioc;
2594     struct mpt3_ioctl_header ioctl_header;
2595     enum block_state state;
2596     long ret = -ENOIOCTLCMD;
2597
2598     /* get IOCTL header */
2599     if (copy_from_user(&ioctl_header, (char __user *)arg,
2600         sizeof(struct mpt3_ioctl_header))) {
2601         pr_err("failure at %s:%d/%s()!\n",
2602             __FILE__, __LINE__, __func__);
2603         return -EFAULT;
2604     }
2605
2606     if (_ctl_verify_adapter(ioctl_header.ioc_number,
2607                 &ioc, mpi_version) == -1 || !ioc)
2608         return -ENODEV;
2609
2610     /* pci_access_mutex lock acquired by ioctl path */
2611     mutex_lock(&ioc->pci_access_mutex);
2612
2613     if (ioc->shost_recovery || ioc->pci_error_recovery ||
2614         ioc->is_driver_loading || ioc->remove_host) {
2615         ret = -EAGAIN;
2616         goto out_unlock_pciaccess;
2617     }
2618
2619     state = (file->f_flags & O_NONBLOCK) ? NON_BLOCKING : BLOCKING;
2620     if (state == NON_BLOCKING) {
2621         if (!mutex_trylock(&ioc->ctl_cmds.mutex)) {
2622             ret = -EAGAIN;
2623             goto out_unlock_pciaccess;
2624         }
2625     } else if (mutex_lock_interruptible(&ioc->ctl_cmds.mutex)) {
2626         ret = -ERESTARTSYS;
2627         goto out_unlock_pciaccess;
2628     }
2629
2630
2631     switch (cmd) {
2632     case MPT3IOCINFO:
2633         if (_IOC_SIZE(cmd) == sizeof(struct mpt3_ioctl_iocinfo))
2634             ret = _ctl_getiocinfo(ioc, arg);
2635         break;
2636 #ifdef CONFIG_COMPAT
2637     case MPT3COMMAND32:
2638 #endif
2639     case MPT3COMMAND:
2640     {
2641         struct mpt3_ioctl_command __user *uarg;
2642         struct mpt3_ioctl_command karg;
2643
2644 #ifdef CONFIG_COMPAT
2645         if (compat) {
2646             ret = _ctl_compat_mpt_command(ioc, cmd, arg);
2647             break;
2648         }
2649 #endif
2650         if (copy_from_user(&karg, arg, sizeof(karg))) {
2651             pr_err("failure at %s:%d/%s()!\n",
2652                 __FILE__, __LINE__, __func__);
2653             ret = -EFAULT;
2654             break;
2655         }
2656
2657         if (karg.hdr.ioc_number != ioctl_header.ioc_number) {
2658             ret = -EINVAL;
2659             break;
2660         }
2661         if (_IOC_SIZE(cmd) == sizeof(struct mpt3_ioctl_command)) {
2662             uarg = arg;
2663             ret = _ctl_do_mpt_command(ioc, karg, &uarg->mf);
2664         }
2665         break;
2666     }
2667     case MPT3EVENTQUERY:
2668         if (_IOC_SIZE(cmd) == sizeof(struct mpt3_ioctl_eventquery))
2669             ret = _ctl_eventquery(ioc, arg);
2670         break;
2671     case MPT3EVENTENABLE:
2672         if (_IOC_SIZE(cmd) == sizeof(struct mpt3_ioctl_eventenable))
2673             ret = _ctl_eventenable(ioc, arg);
2674         break;
2675     case MPT3EVENTREPORT:
2676         ret = _ctl_eventreport(ioc, arg);
2677         break;
2678     case MPT3HARDRESET:
2679         if (_IOC_SIZE(cmd) == sizeof(struct mpt3_ioctl_diag_reset))
2680             ret = _ctl_do_reset(ioc, arg);
2681         break;
2682     case MPT3BTDHMAPPING:
2683         if (_IOC_SIZE(cmd) == sizeof(struct mpt3_ioctl_btdh_mapping))
2684             ret = _ctl_btdh_mapping(ioc, arg);
2685         break;
2686     case MPT3DIAGREGISTER:
2687         if (_IOC_SIZE(cmd) == sizeof(struct mpt3_diag_register))
2688             ret = _ctl_diag_register(ioc, arg);
2689         break;
2690     case MPT3DIAGUNREGISTER:
2691         if (_IOC_SIZE(cmd) == sizeof(struct mpt3_diag_unregister))
2692             ret = _ctl_diag_unregister(ioc, arg);
2693         break;
2694     case MPT3DIAGQUERY:
2695         if (_IOC_SIZE(cmd) == sizeof(struct mpt3_diag_query))
2696             ret = _ctl_diag_query(ioc, arg);
2697         break;
2698     case MPT3DIAGRELEASE:
2699         if (_IOC_SIZE(cmd) == sizeof(struct mpt3_diag_release))
2700             ret = _ctl_diag_release(ioc, arg);
2701         break;
2702     case MPT3DIAGREADBUFFER:
2703         if (_IOC_SIZE(cmd) == sizeof(struct mpt3_diag_read_buffer))
2704             ret = _ctl_diag_read_buffer(ioc, arg);
2705         break;
2706     case MPT3ADDNLDIAGQUERY:
2707         if (_IOC_SIZE(cmd) == sizeof(struct mpt3_addnl_diag_query))
2708             ret = _ctl_addnl_diag_query(ioc, arg);
2709         break;
2710     default:
2711         dctlprintk(ioc,
2712                ioc_info(ioc, "unsupported ioctl opcode(0x%08x)\n",
2713                     cmd));
2714         break;
2715     }
2716
2717     mutex_unlock(&ioc->ctl_cmds.mutex);
2718 out_unlock_pciaccess:
2719     mutex_unlock(&ioc->pci_access_mutex);
2720     return ret;
2721 }
2722
2723 /**
2724  * _ctl_ioctl - mpt3ctl main ioctl entry point (unlocked)
2725  * @file: (struct file)
2726  * @cmd: ioctl opcode
2727  * @arg: ?
2728  */
2729 static long
2730 _ctl_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2731 {
2732     long ret;
2733
2734     /* pass MPI25_VERSION | MPI26_VERSION value,
2735      * to indicate that this ioctl cmd
2736      * came from mpt3ctl ioctl device.
2737      */
2738     ret = _ctl_ioctl_main(file, cmd, (void __user *)arg, 0,
2739         MPI25_VERSION | MPI26_VERSION);
2740     return ret;
2741 }
2742
2743 /**
2744  * _ctl_mpt2_ioctl - mpt2ctl main ioctl entry point (unlocked)
2745  * @file: (struct file)
2746  * @cmd: ioctl opcode
2747  * @arg: ?
2748  */
2749 static long
2750 _ctl_mpt2_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2751 {
2752     long ret;
2753
2754     /* pass MPI2_VERSION value, to indicate that this ioctl cmd
2755      * came from mpt2ctl ioctl device.
2756      */
2757     ret = _ctl_ioctl_main(file, cmd, (void __user *)arg, 0, MPI2_VERSION);
2758     return ret;
2759 }
2760 #ifdef CONFIG_COMPAT
2761 /**
2762  * _ctl_ioctl_compat - main ioctl entry point (compat)
2763  * @file: ?
2764  * @cmd: ?
2765  * @arg: ?
2766  *
2767  * This routine handles 32 bit applications in 64bit os.
2768  */
2769 static long
2770 _ctl_ioctl_compat(struct file *file, unsigned cmd, unsigned long arg)
2771 {
2772     long ret;
2773
2774     ret = _ctl_ioctl_main(file, cmd, (void __user *)arg, 1,
2775         MPI25_VERSION | MPI26_VERSION);
2776     return ret;
2777 }
2778
2779 /**
2780  * _ctl_mpt2_ioctl_compat - main ioctl entry point (compat)
2781  * @file: ?
2782  * @cmd: ?
2783  * @arg: ?
2784  *
2785  * This routine handles 32 bit applications in 64bit os.
2786  */
2787 static long
2788 _ctl_mpt2_ioctl_compat(struct file *file, unsigned cmd, unsigned long arg)
2789 {
2790     long ret;
2791
2792     ret = _ctl_ioctl_main(file, cmd, (void __user *)arg, 1, MPI2_VERSION);
2793     return ret;
2794 }
2795 #endif
2796
2797 /* scsi host attributes */
2798 /**
2799  * version_fw_show - firmware version
2800  * @cdev: pointer to embedded class device
2801  * @attr: ?
2802  * @buf: the buffer returned
2803  *
2804  * A sysfs 'read-only' shost attribute.
2805  */
2806 static ssize_t
2807 version_fw_show(struct device *cdev, struct device_attribute *attr,
2808     char *buf)
2809 {
2810     struct Scsi_Host *shost = class_to_shost(cdev);
2811     struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2812
2813     return snprintf(buf, PAGE_SIZE, "%02d.%02d.%02d.%02d\n",
2814         (ioc->facts.FWVersion.Word & 0xFF000000) >> 24,
2815         (ioc->facts.FWVersion.Word & 0x00FF0000) >> 16,
2816         (ioc->facts.FWVersion.Word & 0x0000FF00) >> 8,
2817         ioc->facts.FWVersion.Word & 0x000000FF);
2818 }
2819 static DEVICE_ATTR_RO(version_fw);
2820
2821 /**
2822  * version_bios_show - bios version
2823  * @cdev: pointer to embedded class device
2824  * @attr: ?
2825  * @buf: the buffer returned
2826  *
2827  * A sysfs 'read-only' shost attribute.
2828  */
2829 static ssize_t
2830 version_bios_show(struct device *cdev, struct device_attribute *attr,
2831     char *buf)
2832 {
2833     struct Scsi_Host *shost = class_to_shost(cdev);
2834     struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2835
2836     u32 version = le32_to_cpu(ioc->bios_pg3.BiosVersion);
2837
2838     return snprintf(buf, PAGE_SIZE, "%02d.%02d.%02d.%02d\n",
2839         (version & 0xFF000000) >> 24,
2840         (version & 0x00FF0000) >> 16,
2841         (version & 0x0000FF00) >> 8,
2842         version & 0x000000FF);
2843 }
2844 static DEVICE_ATTR_RO(version_bios);
2845
2846 /**
2847  * version_mpi_show - MPI (message passing interface) version
2848  * @cdev: pointer to embedded class device
2849  * @attr: ?
2850  * @buf: the buffer returned
2851  *
2852  * A sysfs 'read-only' shost attribute.
2853  */
2854 static ssize_t
2855 version_mpi_show(struct device *cdev, struct device_attribute *attr,
2856     char *buf)
2857 {
2858     struct Scsi_Host *shost = class_to_shost(cdev);
2859     struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2860
2861     return snprintf(buf, PAGE_SIZE, "%03x.%02x\n",
2862         ioc->facts.MsgVersion, ioc->facts.HeaderVersion >> 8);
2863 }
2864 static DEVICE_ATTR_RO(version_mpi);
2865
2866 /**
2867  * version_product_show - product name
2868  * @cdev: pointer to embedded class device
2869  * @attr: ?
2870  * @buf: the buffer returned
2871  *
2872  * A sysfs 'read-only' shost attribute.
2873  */
2874 static ssize_t
2875 version_product_show(struct device *cdev, struct device_attribute *attr,
2876     char *buf)
2877 {
2878     struct Scsi_Host *shost = class_to_shost(cdev);
2879     struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2880
2881     return snprintf(buf, 16, "%s\n", ioc->manu_pg0.ChipName);
2882 }
2883 static DEVICE_ATTR_RO(version_product);
2884
2885 /**
2886  * version_nvdata_persistent_show - ndvata persistent version
2887  * @cdev: pointer to embedded class device
2888  * @attr: ?
2889  * @buf: the buffer returned
2890  *
2891  * A sysfs 'read-only' shost attribute.
2892  */
2893 static ssize_t
2894 version_nvdata_persistent_show(struct device *cdev,
2895     struct device_attribute *attr, char *buf)
2896 {
2897     struct Scsi_Host *shost = class_to_shost(cdev);
2898     struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2899
2900     return snprintf(buf, PAGE_SIZE, "%08xh\n",
2901         le32_to_cpu(ioc->iounit_pg0.NvdataVersionPersistent.Word));
2902 }
2903 static DEVICE_ATTR_RO(version_nvdata_persistent);
2904
2905 /**
2906  * version_nvdata_default_show - nvdata default version
2907  * @cdev: pointer to embedded class device
2908  * @attr: ?
2909  * @buf: the buffer returned
2910  *
2911  * A sysfs 'read-only' shost attribute.
2912  */
2913 static ssize_t
2914 version_nvdata_default_show(struct device *cdev, struct device_attribute
2915     *attr, char *buf)
2916 {
2917     struct Scsi_Host *shost = class_to_shost(cdev);
2918     struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2919
2920     return snprintf(buf, PAGE_SIZE, "%08xh\n",
2921         le32_to_cpu(ioc->iounit_pg0.NvdataVersionDefault.Word));
2922 }
2923 static DEVICE_ATTR_RO(version_nvdata_default);
2924
2925 /**
2926  * board_name_show - board name
2927  * @cdev: pointer to embedded class device
2928  * @attr: ?
2929  * @buf: the buffer returned
2930  *
2931  * A sysfs 'read-only' shost attribute.
2932  */
2933 static ssize_t
2934 board_name_show(struct device *cdev, struct device_attribute *attr,
2935     char *buf)
2936 {
2937     struct Scsi_Host *shost = class_to_shost(cdev);
2938     struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2939
2940     return snprintf(buf, 16, "%s\n", ioc->manu_pg0.BoardName);
2941 }
2942 static DEVICE_ATTR_RO(board_name);
2943
2944 /**
2945  * board_assembly_show - board assembly name
2946  * @cdev: pointer to embedded class device
2947  * @attr: ?
2948  * @buf: the buffer returned
2949  *
2950  * A sysfs 'read-only' shost attribute.
2951  */
2952 static ssize_t
2953 board_assembly_show(struct device *cdev, struct device_attribute *attr,
2954     char *buf)
2955 {
2956     struct Scsi_Host *shost = class_to_shost(cdev);
2957     struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2958
2959     return snprintf(buf, 16, "%s\n", ioc->manu_pg0.BoardAssembly);
2960 }
2961 static DEVICE_ATTR_RO(board_assembly);
2962
2963 /**
2964  * board_tracer_show - board tracer number
2965  * @cdev: pointer to embedded class device
2966  * @attr: ?
2967  * @buf: the buffer returned
2968  *
2969  * A sysfs 'read-only' shost attribute.
2970  */
2971 static ssize_t
2972 board_tracer_show(struct device *cdev, struct device_attribute *attr,
2973     char *buf)
2974 {
2975     struct Scsi_Host *shost = class_to_shost(cdev);
2976     struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2977
2978     return snprintf(buf, 16, "%s\n", ioc->manu_pg0.BoardTracerNumber);
2979 }
2980 static DEVICE_ATTR_RO(board_tracer);
2981
2982 /**
2983  * io_delay_show - io missing delay
2984  * @cdev: pointer to embedded class device
2985  * @attr: ?
2986  * @buf: the buffer returned
2987  *
2988  * This is for firmware implemention for deboucing device
2989  * removal events.
2990  *
2991  * A sysfs 'read-only' shost attribute.
2992  */
2993 static ssize_t
2994 io_delay_show(struct device *cdev, struct device_attribute *attr,
2995     char *buf)
2996 {
2997     struct Scsi_Host *shost = class_to_shost(cdev);
2998     struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2999
3000     return snprintf(buf, PAGE_SIZE, "%02d\n", ioc->io_missing_delay);
3001 }
3002 static DEVICE_ATTR_RO(io_delay);
3003
3004 /**
3005  * device_delay_show - device missing delay
3006  * @cdev: pointer to embedded class device
3007  * @attr: ?
3008  * @buf: the buffer returned
3009  *
3010  * This is for firmware implemention for deboucing device
3011  * removal events.
3012  *
3013  * A sysfs 'read-only' shost attribute.
3014  */
3015 static ssize_t
3016 device_delay_show(struct device *cdev, struct device_attribute *attr,
3017     char *buf)
3018 {
3019     struct Scsi_Host *shost = class_to_shost(cdev);
3020     struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3021
3022     return snprintf(buf, PAGE_SIZE, "%02d\n", ioc->device_missing_delay);
3023 }
3024 static DEVICE_ATTR_RO(device_delay);
3025
3026 /**
3027  * fw_queue_depth_show - global credits
3028  * @cdev: pointer to embedded class device
3029  * @attr: ?
3030  * @buf: the buffer returned
3031  *
3032  * This is firmware queue depth limit
3033  *
3034  * A sysfs 'read-only' shost attribute.
3035  */
3036 static ssize_t
3037 fw_queue_depth_show(struct device *cdev, struct device_attribute *attr,
3038     char *buf)
3039 {
3040     struct Scsi_Host *shost = class_to_shost(cdev);
3041     struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3042
3043     return snprintf(buf, PAGE_SIZE, "%02d\n", ioc->facts.RequestCredit);
3044 }
3045 static DEVICE_ATTR_RO(fw_queue_depth);
3046
3047 /**
3048  * host_sas_address_show - sas address
3049  * @cdev: pointer to embedded class device
3050  * @attr: ?
3051  * @buf: the buffer returned
3052  *
3053  * This is the controller sas address
3054  *
3055  * A sysfs 'read-only' shost attribute.
3056  */
3057 static ssize_t
3058 host_sas_address_show(struct device *cdev, struct device_attribute *attr,
3059     char *buf)
3060
3061 {
3062     struct Scsi_Host *shost = class_to_shost(cdev);
3063     struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3064
3065     return snprintf(buf, PAGE_SIZE, "0x%016llx\n",
3066         (unsigned long long)ioc->sas_hba.sas_address);
3067 }
3068 static DEVICE_ATTR_RO(host_sas_address);
3069
3070 /**
3071  * logging_level_show - logging level
3072  * @cdev: pointer to embedded class device
3073  * @attr: ?
3074  * @buf: the buffer returned
3075  *
3076  * A sysfs 'read/write' shost attribute.
3077  */
3078 static ssize_t
3079 logging_level_show(struct device *cdev, struct device_attribute *attr,
3080     char *buf)
3081 {
3082     struct Scsi_Host *shost = class_to_shost(cdev);
3083     struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3084
3085     return snprintf(buf, PAGE_SIZE, "%08xh\n", ioc->logging_level);
3086 }
3087 static ssize_t
3088 logging_level_store(struct device *cdev, struct device_attribute *attr,
3089     const char *buf, size_t count)
3090 {
3091     struct Scsi_Host *shost = class_to_shost(cdev);
3092     struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3093     int val = 0;
3094
3095     if (sscanf(buf, "%x", &val) != 1)
3096         return -EINVAL;
3097
3098     ioc->logging_level = val;
3099     ioc_info(ioc, "logging_level=%08xh\n",
3100          ioc->logging_level);
3101     return strlen(buf);
3102 }
3103 static DEVICE_ATTR_RW(logging_level);
3104
3105 /**
3106  * fwfault_debug_show - show/store fwfault_debug
3107  * @cdev: pointer to embedded class device
3108  * @attr: ?
3109  * @buf: the buffer returned
3110  *
3111  * mpt3sas_fwfault_debug is command line option
3112  * A sysfs 'read/write' shost attribute.
3113  */
3114 static ssize_t
3115 fwfault_debug_show(struct device *cdev, struct device_attribute *attr,
3116     char *buf)
3117 {
3118     struct Scsi_Host *shost = class_to_shost(cdev);
3119     struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3120
3121     return snprintf(buf, PAGE_SIZE, "%d\n", ioc->fwfault_debug);
3122 }
3123 static ssize_t
3124 fwfault_debug_store(struct device *cdev, struct device_attribute *attr,
3125     const char *buf, size_t count)
3126 {
3127     struct Scsi_Host *shost = class_to_shost(cdev);
3128     struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3129     int val = 0;
3130
3131     if (sscanf(buf, "%d", &val) != 1)
3132         return -EINVAL;
3133
3134     ioc->fwfault_debug = val;
3135     ioc_info(ioc, "fwfault_debug=%d\n",
3136          ioc->fwfault_debug);
3137     return strlen(buf);
3138 }
3139 static DEVICE_ATTR_RW(fwfault_debug);
3140
3141 /**
3142  * ioc_reset_count_show - ioc reset count
3143  * @cdev: pointer to embedded class device
3144  * @attr: ?
3145  * @buf: the buffer returned
3146  *
3147  * This is firmware queue depth limit
3148  *
3149  * A sysfs 'read-only' shost attribute.
3150  */
3151 static ssize_t
3152 ioc_reset_count_show(struct device *cdev, struct device_attribute *attr,
3153     char *buf)
3154 {
3155     struct Scsi_Host *shost = class_to_shost(cdev);
3156     struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3157
3158     return snprintf(buf, PAGE_SIZE, "%d\n", ioc->ioc_reset_count);
3159 }
3160 static DEVICE_ATTR_RO(ioc_reset_count);
3161
3162 /**
3163  * reply_queue_count_show - number of reply queues
3164  * @cdev: pointer to embedded class device
3165  * @attr: ?
3166  * @buf: the buffer returned
3167  *
3168  * This is number of reply queues
3169  *
3170  * A sysfs 'read-only' shost attribute.
3171  */
3172 static ssize_t
3173 reply_queue_count_show(struct device *cdev,
3174     struct device_attribute *attr, char *buf)
3175 {
3176     u8 reply_queue_count;
3177     struct Scsi_Host *shost = class_to_shost(cdev);
3178     struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3179
3180     if ((ioc->facts.IOCCapabilities &
3181         MPI2_IOCFACTS_CAPABILITY_MSI_X_INDEX) && ioc->msix_enable)
3182         reply_queue_count = ioc->reply_queue_count;
3183     else
3184         reply_queue_count = 1;
3185
3186     return snprintf(buf, PAGE_SIZE, "%d\n", reply_queue_count);
3187 }
3188 static DEVICE_ATTR_RO(reply_queue_count);
3189
3190 /**
3191  * BRM_status_show - Backup Rail Monitor Status
3192  * @cdev: pointer to embedded class device
3193  * @attr: ?
3194  * @buf: the buffer returned
3195  *
3196  * This is number of reply queues
3197  *
3198  * A sysfs 'read-only' shost attribute.
3199  */
3200 static ssize_t
3201 BRM_status_show(struct device *cdev, struct device_attribute *attr,
3202     char *buf)
3203 {
3204     struct Scsi_Host *shost = class_to_shost(cdev);
3205     struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3206     Mpi2IOUnitPage3_t io_unit_pg3;
3207     Mpi2ConfigReply_t mpi_reply;
3208     u16 backup_rail_monitor_status = 0;
3209     u16 ioc_status;
3210     int sz;
3211     ssize_t rc = 0;
3212
3213     if (!ioc->is_warpdrive) {
3214         ioc_err(ioc, "%s: BRM attribute is only for warpdrive\n",
3215             __func__);
3216         return 0;
3217     }
3218     /* pci_access_mutex lock acquired by sysfs show path */
3219     mutex_lock(&ioc->pci_access_mutex);
3220     if (ioc->pci_error_recovery || ioc->remove_host)
3221         goto out;
3222
3223     sz = sizeof(io_unit_pg3);
3224     memset(&io_unit_pg3, 0, sz);
3225
3226     if (mpt3sas_config_get_iounit_pg3(ioc, &mpi_reply, &io_unit_pg3, sz) !=
3227         0) {
3228         ioc_err(ioc, "%s: failed reading iounit_pg3\n",
3229             __func__);
3230         rc = -EINVAL;
3231         goto out;
3232     }
3233
3234     ioc_status = le16_to_cpu(mpi_reply.IOCStatus) & MPI2_IOCSTATUS_MASK;
3235     if (ioc_status != MPI2_IOCSTATUS_SUCCESS) {
3236         ioc_err(ioc, "%s: iounit_pg3 failed with ioc_status(0x%04x)\n",
3237             __func__, ioc_status);
3238         rc = -EINVAL;
3239         goto out;
3240     }
3241
3242     if (io_unit_pg3.GPIOCount < 25) {
3243         ioc_err(ioc, "%s: iounit_pg3.GPIOCount less than 25 entries, detected (%d) entries\n",
3244             __func__, io_unit_pg3.GPIOCount);
3245         rc = -EINVAL;
3246         goto out;
3247     }
3248
3249     /* BRM status is in bit zero of GPIOVal[24] */
3250     backup_rail_monitor_status = le16_to_cpu(io_unit_pg3.GPIOVal[24]);
3251     rc = snprintf(buf, PAGE_SIZE, "%d\n", (backup_rail_monitor_status & 1));
3252
3253  out:
3254     mutex_unlock(&ioc->pci_access_mutex);
3255     return rc;
3256 }
3257 static DEVICE_ATTR_RO(BRM_status);
3258
3259 struct DIAG_BUFFER_START {
3260     __le32  Size;
3261     __le32  DiagVersion;
3262     u8  BufferType;
3263     u8  Reserved[3];
3264     __le32  Reserved1;
3265     __le32  Reserved2;
3266     __le32  Reserved3;
3267 };
3268
3269 /**
3270  * host_trace_buffer_size_show - host buffer size (trace only)
3271  * @cdev: pointer to embedded class device
3272  * @attr: ?
3273  * @buf: the buffer returned
3274  *
3275  * A sysfs 'read-only' shost attribute.
3276  */
3277 static ssize_t
3278 host_trace_buffer_size_show(struct device *cdev,
3279     struct device_attribute *attr, char *buf)
3280 {
3281     struct Scsi_Host *shost = class_to_shost(cdev);
3282     struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3283     u32 size = 0;
3284     struct DIAG_BUFFER_START *request_data;
3285
3286     if (!ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE]) {
3287         ioc_err(ioc, "%s: host_trace_buffer is not registered\n",
3288             __func__);
3289         return 0;
3290     }
3291
3292     if ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3293         MPT3_DIAG_BUFFER_IS_REGISTERED) == 0) {
3294         ioc_err(ioc, "%s: host_trace_buffer is not registered\n",
3295             __func__);
3296         return 0;
3297     }
3298
3299     request_data = (struct DIAG_BUFFER_START *)
3300         ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE];
3301     if ((le32_to_cpu(request_data->DiagVersion) == 0x00000000 ||
3302         le32_to_cpu(request_data->DiagVersion) == 0x01000000 ||
3303         le32_to_cpu(request_data->DiagVersion) == 0x01010000) &&
3304         le32_to_cpu(request_data->Reserved3) == 0x4742444c)
3305         size = le32_to_cpu(request_data->Size);
3306
3307     ioc->ring_buffer_sz = size;
3308     return snprintf(buf, PAGE_SIZE, "%d\n", size);
3309 }
3310 static DEVICE_ATTR_RO(host_trace_buffer_size);
3311
3312 /**
3313  * host_trace_buffer_show - firmware ring buffer (trace only)
3314  * @cdev: pointer to embedded class device
3315  * @attr: ?
3316  * @buf: the buffer returned
3317  *
3318  * A sysfs 'read/write' shost attribute.
3319  *
3320  * You will only be able to read 4k bytes of ring buffer at a time.
3321  * In order to read beyond 4k bytes, you will have to write out the
3322  * offset to the same attribute, it will move the pointer.
3323  */
3324 static ssize_t
3325 host_trace_buffer_show(struct device *cdev, struct device_attribute *attr,
3326     char *buf)
3327 {
3328     struct Scsi_Host *shost = class_to_shost(cdev);
3329     struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3330     void *request_data;
3331     u32 size;
3332
3333     if (!ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE]) {
3334         ioc_err(ioc, "%s: host_trace_buffer is not registered\n",
3335             __func__);
3336         return 0;
3337     }
3338
3339     if ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3340         MPT3_DIAG_BUFFER_IS_REGISTERED) == 0) {
3341         ioc_err(ioc, "%s: host_trace_buffer is not registered\n",
3342             __func__);
3343         return 0;
3344     }
3345
3346     if (ioc->ring_buffer_offset > ioc->ring_buffer_sz)
3347         return 0;
3348
3349     size = ioc->ring_buffer_sz - ioc->ring_buffer_offset;
3350     size = (size >= PAGE_SIZE) ? (PAGE_SIZE - 1) : size;
3351     request_data = ioc->diag_buffer[0] + ioc->ring_buffer_offset;
3352     memcpy(buf, request_data, size);
3353     return size;
3354 }
3355
3356 static ssize_t
3357 host_trace_buffer_store(struct device *cdev, struct device_attribute *attr,
3358     const char *buf, size_t count)
3359 {
3360     struct Scsi_Host *shost = class_to_shost(cdev);
3361     struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3362     int val = 0;
3363
3364     if (sscanf(buf, "%d", &val) != 1)
3365         return -EINVAL;
3366
3367     ioc->ring_buffer_offset = val;
3368     return strlen(buf);
3369 }
3370 static DEVICE_ATTR_RW(host_trace_buffer);
3371
3372
3373 /*****************************************/
3374
3375 /**
3376  * host_trace_buffer_enable_show - firmware ring buffer (trace only)
3377  * @cdev: pointer to embedded class device
3378  * @attr: ?
3379  * @buf: the buffer returned
3380  *
3381  * A sysfs 'read/write' shost attribute.
3382  *
3383  * This is a mechnism to post/release host_trace_buffers
3384  */
3385 static ssize_t
3386 host_trace_buffer_enable_show(struct device *cdev,
3387     struct device_attribute *attr, char *buf)
3388 {
3389     struct Scsi_Host *shost = class_to_shost(cdev);
3390     struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3391
3392     if ((!ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE]) ||
3393        ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3394         MPT3_DIAG_BUFFER_IS_REGISTERED) == 0))
3395         return snprintf(buf, PAGE_SIZE, "off\n");
3396     else if ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3397         MPT3_DIAG_BUFFER_IS_RELEASED))
3398         return snprintf(buf, PAGE_SIZE, "release\n");
3399     else
3400         return snprintf(buf, PAGE_SIZE, "post\n");
3401 }
3402
3403 static ssize_t
3404 host_trace_buffer_enable_store(struct device *cdev,
3405     struct device_attribute *attr, const char *buf, size_t count)
3406 {
3407     struct Scsi_Host *shost = class_to_shost(cdev);
3408     struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3409     char str[10] = "";
3410     struct mpt3_diag_register diag_register;
3411     u8 issue_reset = 0;
3412
3413     /* don't allow post/release occurr while recovery is active */
3414     if (ioc->shost_recovery || ioc->remove_host ||
3415         ioc->pci_error_recovery || ioc->is_driver_loading)
3416         return -EBUSY;
3417
3418     if (sscanf(buf, "%9s", str) != 1)
3419         return -EINVAL;
3420
3421     if (!strcmp(str, "post")) {
3422         /* exit out if host buffers are already posted */
3423         if ((ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE]) &&
3424             (ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3425             MPT3_DIAG_BUFFER_IS_REGISTERED) &&
3426             ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3427             MPT3_DIAG_BUFFER_IS_RELEASED) == 0))
3428             goto out;
3429         memset(&diag_register, 0, sizeof(struct mpt3_diag_register));
3430         ioc_info(ioc, "posting host trace buffers\n");
3431         diag_register.buffer_type = MPI2_DIAG_BUF_TYPE_TRACE;
3432
3433         if (ioc->manu_pg11.HostTraceBufferMaxSizeKB != 0 &&
3434             ioc->diag_buffer_sz[MPI2_DIAG_BUF_TYPE_TRACE] != 0) {
3435             /* post the same buffer allocated previously */
3436             diag_register.requested_buffer_size =
3437                 ioc->diag_buffer_sz[MPI2_DIAG_BUF_TYPE_TRACE];
3438         } else {
3439             /*
3440              * Free the diag buffer memory which was previously
3441              * allocated by an application.
3442              */
3443             if ((ioc->diag_buffer_sz[MPI2_DIAG_BUF_TYPE_TRACE] != 0)
3444                 &&
3445                 (ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3446                 MPT3_DIAG_BUFFER_IS_APP_OWNED)) {
3447                 dma_free_coherent(&ioc->pdev->dev,
3448                           ioc->diag_buffer_sz[MPI2_DIAG_BUF_TYPE_TRACE],
3449                           ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE],
3450                           ioc->diag_buffer_dma[MPI2_DIAG_BUF_TYPE_TRACE]);
3451                 ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE] =
3452                     NULL;
3453             }
3454
3455             diag_register.requested_buffer_size = (1024 * 1024);
3456         }
3457
3458         diag_register.unique_id =
3459             (ioc->hba_mpi_version_belonged == MPI2_VERSION) ?
3460             (MPT2DIAGBUFFUNIQUEID):(MPT3DIAGBUFFUNIQUEID);
3461         ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] = 0;
3462         _ctl_diag_register_2(ioc,  &diag_register);
3463         if (ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3464             MPT3_DIAG_BUFFER_IS_REGISTERED) {
3465             ioc_info(ioc,
3466                 "Trace buffer %d KB allocated through sysfs\n",
3467                 diag_register.requested_buffer_size>>10);
3468             if (ioc->hba_mpi_version_belonged != MPI2_VERSION)
3469                 ioc->diag_buffer_status[
3470                     MPI2_DIAG_BUF_TYPE_TRACE] |=
3471                     MPT3_DIAG_BUFFER_IS_DRIVER_ALLOCATED;
3472         }
3473     } else if (!strcmp(str, "release")) {
3474         /* exit out if host buffers are already released */
3475         if (!ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE])
3476             goto out;
3477         if ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3478             MPT3_DIAG_BUFFER_IS_REGISTERED) == 0)
3479             goto out;
3480         if ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3481             MPT3_DIAG_BUFFER_IS_RELEASED))
3482             goto out;
3483         ioc_info(ioc, "releasing host trace buffer\n");
3484         ioc->htb_rel.buffer_rel_condition = MPT3_DIAG_BUFFER_REL_SYSFS;
3485         mpt3sas_send_diag_release(ioc, MPI2_DIAG_BUF_TYPE_TRACE,
3486             &issue_reset);
3487     }
3488
3489  out:
3490     return strlen(buf);
3491 }
3492 static DEVICE_ATTR_RW(host_trace_buffer_enable);
3493
3494 /*********** diagnostic trigger suppport *********************************/
3495
3496 /**
3497  * diag_trigger_master_show - show the diag_trigger_master attribute
3498  * @cdev: pointer to embedded class device
3499  * @attr: ?
3500  * @buf: the buffer returned
3501  *
3502  * A sysfs 'read/write' shost attribute.
3503  */
3504 static ssize_t
3505 diag_trigger_master_show(struct device *cdev,
3506     struct device_attribute *attr, char *buf)
3507
3508 {
3509     struct Scsi_Host *shost = class_to_shost(cdev);
3510     struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3511     unsigned long flags;
3512     ssize_t rc;
3513
3514     spin_lock_irqsave(&ioc->diag_trigger_lock, flags);
3515     rc = sizeof(struct SL_WH_MASTER_TRIGGER_T);
3516     memcpy(buf, &ioc->diag_trigger_master, rc);
3517     spin_unlock_irqrestore(&ioc->diag_trigger_lock, flags);
3518     return rc;
3519 }
3520
3521 /**
3522  * diag_trigger_master_store - store the diag_trigger_master attribute
3523  * @cdev: pointer to embedded class device
3524  * @attr: ?
3525  * @buf: the buffer returned
3526  * @count: ?
3527  *
3528  * A sysfs 'read/write' shost attribute.
3529  */
3530 static ssize_t
3531 diag_trigger_master_store(struct device *cdev,
3532     struct device_attribute *attr, const char *buf, size_t count)
3533
3534 {
3535     struct Scsi_Host *shost = class_to_shost(cdev);
3536     struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3537     struct SL_WH_MASTER_TRIGGER_T *master_tg;
3538     unsigned long flags;
3539     ssize_t rc;
3540     bool set = 1;
3541
3542     rc = min(sizeof(struct SL_WH_MASTER_TRIGGER_T), count);
3543
3544     if (ioc->supports_trigger_pages) {
3545         master_tg = kzalloc(sizeof(struct SL_WH_MASTER_TRIGGER_T),
3546             GFP_KERNEL);
3547         if (!master_tg)
3548             return -ENOMEM;
3549
3550         memcpy(master_tg, buf, rc);
3551         if (!master_tg->MasterData)
3552             set = 0;
3553         if (mpt3sas_config_update_driver_trigger_pg1(ioc, master_tg,
3554             set)) {
3555             kfree(master_tg);
3556             return -EFAULT;
3557         }
3558         kfree(master_tg);
3559     }
3560
3561     spin_lock_irqsave(&ioc->diag_trigger_lock, flags);
3562     memset(&ioc->diag_trigger_master, 0,
3563         sizeof(struct SL_WH_MASTER_TRIGGER_T));
3564     memcpy(&ioc->diag_trigger_master, buf, rc);
3565     ioc->diag_trigger_master.MasterData |=
3566         (MASTER_TRIGGER_FW_FAULT + MASTER_TRIGGER_ADAPTER_RESET);
3567     spin_unlock_irqrestore(&ioc->diag_trigger_lock, flags);
3568     return rc;
3569 }
3570 static DEVICE_ATTR_RW(diag_trigger_master);
3571
3572
3573 /**
3574  * diag_trigger_event_show - show the diag_trigger_event attribute
3575  * @cdev: pointer to embedded class device
3576  * @attr: ?
3577  * @buf: the buffer returned
3578  *
3579  * A sysfs 'read/write' shost attribute.
3580  */
3581 static ssize_t
3582 diag_trigger_event_show(struct device *cdev,
3583     struct device_attribute *attr, char *buf)
3584 {
3585     struct Scsi_Host *shost = class_to_shost(cdev);
3586     struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3587     unsigned long flags;
3588     ssize_t rc;
3589
3590     spin_lock_irqsave(&ioc->diag_trigger_lock, flags);
3591     rc = sizeof(struct SL_WH_EVENT_TRIGGERS_T);
3592     memcpy(buf, &ioc->diag_trigger_event, rc);
3593     spin_unlock_irqrestore(&ioc->diag_trigger_lock, flags);
3594     return rc;
3595 }
3596
3597 /**
3598  * diag_trigger_event_store - store the diag_trigger_event attribute
3599  * @cdev: pointer to embedded class device
3600  * @attr: ?
3601  * @buf: the buffer returned
3602  * @count: ?
3603  *
3604  * A sysfs 'read/write' shost attribute.
3605  */
3606 static ssize_t
3607 diag_trigger_event_store(struct device *cdev,
3608     struct device_attribute *attr, const char *buf, size_t count)
3609
3610 {
3611     struct Scsi_Host *shost = class_to_shost(cdev);
3612     struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3613     struct SL_WH_EVENT_TRIGGERS_T *event_tg;
3614     unsigned long flags;
3615     ssize_t sz;
3616     bool set = 1;
3617
3618     sz = min(sizeof(struct SL_WH_EVENT_TRIGGERS_T), count);
3619     if (ioc->supports_trigger_pages) {
3620         event_tg = kzalloc(sizeof(struct SL_WH_EVENT_TRIGGERS_T),
3621             GFP_KERNEL);
3622         if (!event_tg)
3623             return -ENOMEM;
3624
3625         memcpy(event_tg, buf, sz);
3626         if (!event_tg->ValidEntries)
3627             set = 0;
3628         if (mpt3sas_config_update_driver_trigger_pg2(ioc, event_tg,
3629             set)) {
3630             kfree(event_tg);
3631             return -EFAULT;
3632         }
3633         kfree(event_tg);
3634     }
3635
3636     spin_lock_irqsave(&ioc->diag_trigger_lock, flags);
3637
3638     memset(&ioc->diag_trigger_event, 0,
3639         sizeof(struct SL_WH_EVENT_TRIGGERS_T));
3640     memcpy(&ioc->diag_trigger_event, buf, sz);
3641     if (ioc->diag_trigger_event.ValidEntries > NUM_VALID_ENTRIES)
3642         ioc->diag_trigger_event.ValidEntries = NUM_VALID_ENTRIES;
3643     spin_unlock_irqrestore(&ioc->diag_trigger_lock, flags);
3644     return sz;
3645 }
3646 static DEVICE_ATTR_RW(diag_trigger_event);
3647
3648
3649 /**
3650  * diag_trigger_scsi_show - show the diag_trigger_scsi attribute
3651  * @cdev: pointer to embedded class device
3652  * @attr: ?
3653  * @buf: the buffer returned
3654  *
3655  * A sysfs 'read/write' shost attribute.
3656  */
3657 static ssize_t
3658 diag_trigger_scsi_show(struct device *cdev,
3659     struct device_attribute *attr, char *buf)
3660 {
3661     struct Scsi_Host *shost = class_to_shost(cdev);
3662     struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3663     unsigned long flags;
3664     ssize_t rc;
3665
3666     spin_lock_irqsave(&ioc->diag_trigger_lock, flags);
3667     rc = sizeof(struct SL_WH_SCSI_TRIGGERS_T);
3668     memcpy(buf, &ioc->diag_trigger_scsi, rc);
3669     spin_unlock_irqrestore(&ioc->diag_trigger_lock, flags);
3670     return rc;
3671 }
3672
3673 /**
3674  * diag_trigger_scsi_store - store the diag_trigger_scsi attribute
3675  * @cdev: pointer to embedded class device
3676  * @attr: ?
3677  * @buf: the buffer returned
3678  * @count: ?
3679  *
3680  * A sysfs 'read/write' shost attribute.
3681  */
3682 static ssize_t
3683 diag_trigger_scsi_store(struct device *cdev,
3684     struct device_attribute *attr, const char *buf, size_t count)
3685 {
3686     struct Scsi_Host *shost = class_to_shost(cdev);
3687     struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3688     struct SL_WH_SCSI_TRIGGERS_T *scsi_tg;
3689     unsigned long flags;
3690     ssize_t sz;
3691     bool set = 1;
3692
3693     sz = min(sizeof(struct SL_WH_SCSI_TRIGGERS_T), count);
3694     if (ioc->supports_trigger_pages) {
3695         scsi_tg = kzalloc(sizeof(struct SL_WH_SCSI_TRIGGERS_T),
3696             GFP_KERNEL);
3697         if (!scsi_tg)
3698             return -ENOMEM;
3699
3700         memcpy(scsi_tg, buf, sz);
3701         if (!scsi_tg->ValidEntries)
3702             set = 0;
3703         if (mpt3sas_config_update_driver_trigger_pg3(ioc, scsi_tg,
3704             set)) {
3705             kfree(scsi_tg);
3706             return -EFAULT;
3707         }
3708         kfree(scsi_tg);
3709     }
3710
3711     spin_lock_irqsave(&ioc->diag_trigger_lock, flags);
3712
3713     memset(&ioc->diag_trigger_scsi, 0, sizeof(ioc->diag_trigger_scsi));
3714     memcpy(&ioc->diag_trigger_scsi, buf, sz);
3715     if (ioc->diag_trigger_scsi.ValidEntries > NUM_VALID_ENTRIES)
3716         ioc->diag_trigger_scsi.ValidEntries = NUM_VALID_ENTRIES;
3717     spin_unlock_irqrestore(&ioc->diag_trigger_lock, flags);
3718     return sz;
3719 }
3720 static DEVICE_ATTR_RW(diag_trigger_scsi);
3721
3722
3723 /**
3724  * diag_trigger_mpi_show - show the diag_trigger_mpi attribute
3725  * @cdev: pointer to embedded class device
3726  * @attr: ?
3727  * @buf: the buffer returned
3728  *
3729  * A sysfs 'read/write' shost attribute.
3730  */
3731 static ssize_t
3732 diag_trigger_mpi_show(struct device *cdev,
3733     struct device_attribute *attr, char *buf)
3734 {
3735     struct Scsi_Host *shost = class_to_shost(cdev);
3736     struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3737     unsigned long flags;
3738     ssize_t rc;
3739
3740     spin_lock_irqsave(&ioc->diag_trigger_lock, flags);
3741     rc = sizeof(struct SL_WH_MPI_TRIGGERS_T);
3742     memcpy(buf, &ioc->diag_trigger_mpi, rc);
3743     spin_unlock_irqrestore(&ioc->diag_trigger_lock, flags);
3744     return rc;
3745 }
3746
3747 /**
3748  * diag_trigger_mpi_store - store the diag_trigger_mpi attribute
3749  * @cdev: pointer to embedded class device
3750  * @attr: ?
3751  * @buf: the buffer returned
3752  * @count: ?
3753  *
3754  * A sysfs 'read/write' shost attribute.
3755  */
3756 static ssize_t
3757 diag_trigger_mpi_store(struct device *cdev,
3758     struct device_attribute *attr, const char *buf, size_t count)
3759 {
3760     struct Scsi_Host *shost = class_to_shost(cdev);
3761     struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3762     struct SL_WH_MPI_TRIGGERS_T *mpi_tg;
3763     unsigned long flags;
3764     ssize_t sz;
3765     bool set = 1;
3766
3767     sz = min(sizeof(struct SL_WH_MPI_TRIGGERS_T), count);
3768     if (ioc->supports_trigger_pages) {
3769         mpi_tg = kzalloc(sizeof(struct SL_WH_MPI_TRIGGERS_T),
3770             GFP_KERNEL);
3771         if (!mpi_tg)
3772             return -ENOMEM;
3773
3774         memcpy(mpi_tg, buf, sz);
3775         if (!mpi_tg->ValidEntries)
3776             set = 0;
3777         if (mpt3sas_config_update_driver_trigger_pg4(ioc, mpi_tg,
3778             set)) {
3779             kfree(mpi_tg);
3780             return -EFAULT;
3781         }
3782         kfree(mpi_tg);
3783     }
3784
3785     spin_lock_irqsave(&ioc->diag_trigger_lock, flags);
3786     memset(&ioc->diag_trigger_mpi, 0,
3787         sizeof(ioc->diag_trigger_mpi));
3788     memcpy(&ioc->diag_trigger_mpi, buf, sz);
3789     if (ioc->diag_trigger_mpi.ValidEntries > NUM_VALID_ENTRIES)
3790         ioc->diag_trigger_mpi.ValidEntries = NUM_VALID_ENTRIES;
3791     spin_unlock_irqrestore(&ioc->diag_trigger_lock, flags);
3792     return sz;
3793 }
3794
3795 static DEVICE_ATTR_RW(diag_trigger_mpi);
3796
3797 /*********** diagnostic trigger suppport *** END ****************************/
3798
3799 /*****************************************/
3800
3801 /**
3802  * drv_support_bitmap_show - driver supported feature bitmap
3803  * @cdev: pointer to embedded class device
3804  * @attr: unused
3805  * @buf: the buffer returned
3806  *
3807  * A sysfs 'read-only' shost attribute.
3808  */
3809 static ssize_t
3810 drv_support_bitmap_show(struct device *cdev,
3811     struct device_attribute *attr, char *buf)
3812 {
3813     struct Scsi_Host *shost = class_to_shost(cdev);
3814     struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3815
3816     return snprintf(buf, PAGE_SIZE, "0x%08x\n", ioc->drv_support_bitmap);
3817 }
3818 static DEVICE_ATTR_RO(drv_support_bitmap);
3819
3820 /**
3821  * enable_sdev_max_qd_show - display whether sdev max qd is enabled/disabled
3822  * @cdev: pointer to embedded class device
3823  * @attr: unused
3824  * @buf: the buffer returned
3825  *
3826  * A sysfs read/write shost attribute. This attribute is used to set the
3827  * targets queue depth to HBA IO queue depth if this attribute is enabled.
3828  */
3829 static ssize_t
3830 enable_sdev_max_qd_show(struct device *cdev,
3831     struct device_attribute *attr, char *buf)
3832 {
3833     struct Scsi_Host *shost = class_to_shost(cdev);
3834     struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3835
3836     return snprintf(buf, PAGE_SIZE, "%d\n", ioc->enable_sdev_max_qd);
3837 }
3838
3839 /**
3840  * enable_sdev_max_qd_store - Enable/disable sdev max qd
3841  * @cdev: pointer to embedded class device
3842  * @attr: unused
3843  * @buf: the buffer returned
3844  * @count: unused
3845  *
3846  * A sysfs read/write shost attribute. This attribute is used to set the
3847  * targets queue depth to HBA IO queue depth if this attribute is enabled.
3848  * If this attribute is disabled then targets will have corresponding default
3849  * queue depth.
3850  */
3851 static ssize_t
3852 enable_sdev_max_qd_store(struct device *cdev,
3853     struct device_attribute *attr, const char *buf, size_t count)
3854 {
3855     struct Scsi_Host *shost = class_to_shost(cdev);
3856     struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3857     struct MPT3SAS_DEVICE *sas_device_priv_data;
3858     struct MPT3SAS_TARGET *sas_target_priv_data;
3859     int val = 0;
3860     struct scsi_device *sdev;
3861     struct _raid_device *raid_device;
3862     int qdepth;
3863
3864     if (kstrtoint(buf, 0, &val) != 0)
3865         return -EINVAL;
3866
3867     switch (val) {
3868     case 0:
3869         ioc->enable_sdev_max_qd = 0;
3870         shost_for_each_device(sdev, ioc->shost) {
3871             sas_device_priv_data = sdev->hostdata;
3872             if (!sas_device_priv_data)
3873                 continue;
3874             sas_target_priv_data = sas_device_priv_data->sas_target;
3875             if (!sas_target_priv_data)
3876                 continue;
3877
3878             if (sas_target_priv_data->flags &
3879                 MPT_TARGET_FLAGS_VOLUME) {
3880                 raid_device =
3881                     mpt3sas_raid_device_find_by_handle(ioc,
3882                     sas_target_priv_data->handle);
3883
3884                 switch (raid_device->volume_type) {
3885                 case MPI2_RAID_VOL_TYPE_RAID0:
3886                     if (raid_device->device_info &
3887                         MPI2_SAS_DEVICE_INFO_SSP_TARGET)
3888                         qdepth =
3889                             MPT3SAS_SAS_QUEUE_DEPTH;
3890                     else
3891                         qdepth =
3892                             MPT3SAS_SATA_QUEUE_DEPTH;
3893                     break;
3894                 case MPI2_RAID_VOL_TYPE_RAID1E:
3895                 case MPI2_RAID_VOL_TYPE_RAID1:
3896                 case MPI2_RAID_VOL_TYPE_RAID10:
3897                 case MPI2_RAID_VOL_TYPE_UNKNOWN:
3898                 default:
3899                     qdepth = MPT3SAS_RAID_QUEUE_DEPTH;
3900                 }
3901             } else if (sas_target_priv_data->flags &
3902                 MPT_TARGET_FLAGS_PCIE_DEVICE)
3903                 qdepth = ioc->max_nvme_qd;
3904             else
3905                 qdepth = (sas_target_priv_data->sas_dev->port_type > 1) ?
3906                     ioc->max_wideport_qd : ioc->max_narrowport_qd;
3907
3908             mpt3sas_scsih_change_queue_depth(sdev, qdepth);
3909         }
3910         break;
3911     case 1:
3912         ioc->enable_sdev_max_qd = 1;
3913         shost_for_each_device(sdev, ioc->shost)
3914             mpt3sas_scsih_change_queue_depth(sdev,
3915                 shost->can_queue);
3916         break;
3917     default:
3918         return -EINVAL;
3919     }
3920
3921     return strlen(buf);
3922 }
3923 static DEVICE_ATTR_RW(enable_sdev_max_qd);
3924
3925 static struct attribute *mpt3sas_host_attrs[] = {
3926     &dev_attr_version_fw.attr,
3927     &dev_attr_version_bios.attr,
3928     &dev_attr_version_mpi.attr,
3929     &dev_attr_version_product.attr,
3930     &dev_attr_version_nvdata_persistent.attr,
3931     &dev_attr_version_nvdata_default.attr,
3932     &dev_attr_board_name.attr,
3933     &dev_attr_board_assembly.attr,
3934     &dev_attr_board_tracer.attr,
3935     &dev_attr_io_delay.attr,
3936     &dev_attr_device_delay.attr,
3937     &dev_attr_logging_level.attr,
3938     &dev_attr_fwfault_debug.attr,
3939     &dev_attr_fw_queue_depth.attr,
3940     &dev_attr_host_sas_address.attr,
3941     &dev_attr_ioc_reset_count.attr,
3942     &dev_attr_host_trace_buffer_size.attr,
3943     &dev_attr_host_trace_buffer.attr,
3944     &dev_attr_host_trace_buffer_enable.attr,
3945     &dev_attr_reply_queue_count.attr,
3946     &dev_attr_diag_trigger_master.attr,
3947     &dev_attr_diag_trigger_event.attr,
3948     &dev_attr_diag_trigger_scsi.attr,
3949     &dev_attr_diag_trigger_mpi.attr,
3950     &dev_attr_drv_support_bitmap.attr,
3951     &dev_attr_BRM_status.attr,
3952     &dev_attr_enable_sdev_max_qd.attr,
3953     NULL,
3954 };
3955
3956 static const struct attribute_group mpt3sas_host_attr_group = {
3957     .attrs = mpt3sas_host_attrs
3958 };
3959
3960 const struct attribute_group *mpt3sas_host_groups[] = {
3961     &mpt3sas_host_attr_group,
3962     NULL
3963 };
3964
3965 /* device attributes */
3966
3967 /**
3968  * sas_address_show - sas address
3969  * @dev: pointer to embedded class device
3970  * @attr: ?
3971  * @buf: the buffer returned
3972  *
3973  * This is the sas address for the target
3974  *
3975  * A sysfs 'read-only' shost attribute.
3976  */
3977 static ssize_t
3978 sas_address_show(struct device *dev, struct device_attribute *attr,
3979     char *buf)
3980 {
3981     struct scsi_device *sdev = to_scsi_device(dev);
3982     struct MPT3SAS_DEVICE *sas_device_priv_data = sdev->hostdata;
3983
3984     return snprintf(buf, PAGE_SIZE, "0x%016llx\n",
3985         (unsigned long long)sas_device_priv_data->sas_target->sas_address);
3986 }
3987 static DEVICE_ATTR_RO(sas_address);
3988
3989 /**
3990  * sas_device_handle_show - device handle
3991  * @dev: pointer to embedded class device
3992  * @attr: ?
3993  * @buf: the buffer returned
3994  *
3995  * This is the firmware assigned device handle
3996  *
3997  * A sysfs 'read-only' shost attribute.
3998  */
3999 static ssize_t
4000 sas_device_handle_show(struct device *dev, struct device_attribute *attr,
4001     char *buf)
4002 {
4003     struct scsi_device *sdev = to_scsi_device(dev);
4004     struct MPT3SAS_DEVICE *sas_device_priv_data = sdev->hostdata;
4005
4006     return snprintf(buf, PAGE_SIZE, "0x%04x\n",
4007         sas_device_priv_data->sas_target->handle);
4008 }
4009 static DEVICE_ATTR_RO(sas_device_handle);
4010
4011 /**
4012  * sas_ncq_prio_supported_show - Indicate if device supports NCQ priority
4013  * @dev: pointer to embedded device
4014  * @attr: sas_ncq_prio_supported attribute descriptor
4015  * @buf: the buffer returned
4016  *
4017  * A sysfs 'read-only' sdev attribute, only works with SATA
4018  */
4019 static ssize_t
4020 sas_ncq_prio_supported_show(struct device *dev,
4021                 struct device_attribute *attr, char *buf)
4022 {
4023     struct scsi_device *sdev = to_scsi_device(dev);
4024
4025     return sysfs_emit(buf, "%d\n", scsih_ncq_prio_supp(sdev));
4026 }
4027 static DEVICE_ATTR_RO(sas_ncq_prio_supported);
4028
4029 /**
4030  * sas_ncq_prio_enable_show - send prioritized io commands to device
4031  * @dev: pointer to embedded device
4032  * @attr: ?
4033  * @buf: the buffer returned
4034  *
4035  * A sysfs 'read/write' sdev attribute, only works with SATA
4036  */
4037 static ssize_t
4038 sas_ncq_prio_enable_show(struct device *dev,
4039                  struct device_attribute *attr, char *buf)
4040 {
4041     struct scsi_device *sdev = to_scsi_device(dev);
4042     struct MPT3SAS_DEVICE *sas_device_priv_data = sdev->hostdata;
4043
4044     return snprintf(buf, PAGE_SIZE, "%d\n",
4045             sas_device_priv_data->ncq_prio_enable);
4046 }
4047
4048 static ssize_t
4049 sas_ncq_prio_enable_store(struct device *dev,
4050                   struct device_attribute *attr,
4051                   const char *buf, size_t count)
4052 {
4053     struct scsi_device *sdev = to_scsi_device(dev);
4054     struct MPT3SAS_DEVICE *sas_device_priv_data = sdev->hostdata;
4055     bool ncq_prio_enable = 0;
4056
4057     if (kstrtobool(buf, &ncq_prio_enable))
4058         return -EINVAL;
4059
4060     if (!scsih_ncq_prio_supp(sdev))
4061         return -EINVAL;
4062
4063     sas_device_priv_data->ncq_prio_enable = ncq_prio_enable;
4064     return strlen(buf);
4065 }
4066 static DEVICE_ATTR_RW(sas_ncq_prio_enable);
4067
4068 static struct attribute *mpt3sas_dev_attrs[] = {
4069     &dev_attr_sas_address.attr,
4070     &dev_attr_sas_device_handle.attr,
4071     &dev_attr_sas_ncq_prio_supported.attr,
4072     &dev_attr_sas_ncq_prio_enable.attr,
4073     NULL,
4074 };
4075
4076 static const struct attribute_group mpt3sas_dev_attr_group = {
4077     .attrs = mpt3sas_dev_attrs
4078 };
4079
4080 const struct attribute_group *mpt3sas_dev_groups[] = {
4081     &mpt3sas_dev_attr_group,
4082     NULL
4083 };
4084
4085 /* file operations table for mpt3ctl device */
4086 static const struct file_operations ctl_fops = {
4087     .owner = THIS_MODULE,
4088     .unlocked_ioctl = _ctl_ioctl,
4089     .poll = _ctl_poll,
4090     .fasync = _ctl_fasync,
4091 #ifdef CONFIG_COMPAT
4092     .compat_ioctl = _ctl_ioctl_compat,
4093 #endif
4094 };
4095
4096 /* file operations table for mpt2ctl device */
4097 static const struct file_operations ctl_gen2_fops = {
4098     .owner = THIS_MODULE,
4099     .unlocked_ioctl = _ctl_mpt2_ioctl,
4100     .poll = _ctl_poll,
4101     .fasync = _ctl_fasync,
4102 #ifdef CONFIG_COMPAT
4103     .compat_ioctl = _ctl_mpt2_ioctl_compat,
4104 #endif
4105 };
4106
4107 static struct miscdevice ctl_dev = {
4108     .minor  = MPT3SAS_MINOR,
4109     .name   = MPT3SAS_DEV_NAME,
4110     .fops   = &ctl_fops,
4111 };
4112
4113 static struct miscdevice gen2_ctl_dev = {
4114     .minor  = MPT2SAS_MINOR,
4115     .name   = MPT2SAS_DEV_NAME,
4116     .fops   = &ctl_gen2_fops,
4117 };
4118
4119 /**
4120  * mpt3sas_ctl_init - main entry point for ctl.
4121  * @hbas_to_enumerate: ?
4122  */
4123 void
4124 mpt3sas_ctl_init(ushort hbas_to_enumerate)
4125 {
4126     async_queue = NULL;
4127
4128     /* Don't register mpt3ctl ioctl device if
4129      * hbas_to_enumarate is one.
4130      */
4131     if (hbas_to_enumerate != 1)
4132         if (misc_register(&ctl_dev) < 0)
4133             pr_err("%s can't register misc device [minor=%d]\n",
4134                 MPT3SAS_DRIVER_NAME, MPT3SAS_MINOR);
4135
4136     /* Don't register mpt3ctl ioctl device if
4137      * hbas_to_enumarate is two.
4138      */
4139     if (hbas_to_enumerate != 2)
4140         if (misc_register(&gen2_ctl_dev) < 0)
4141             pr_err("%s can't register misc device [minor=%d]\n",
4142                 MPT2SAS_DRIVER_NAME, MPT2SAS_MINOR);
4143
4144     init_waitqueue_head(&ctl_poll_wait);
4145 }
4146
4147 /**
4148  * mpt3sas_ctl_exit - exit point for ctl
4149  * @hbas_to_enumerate: ?
4150  */
4151 void
4152 mpt3sas_ctl_exit(ushort hbas_to_enumerate)
4153 {
4154     struct MPT3SAS_ADAPTER *ioc;
4155     int i;
4156
4157     list_for_each_entry(ioc, &mpt3sas_ioc_list, list) {
4158
4159         /* free memory associated to diag buffers */
4160         for (i = 0; i < MPI2_DIAG_BUF_TYPE_COUNT; i++) {
4161             if (!ioc->diag_buffer[i])
4162                 continue;
4163             dma_free_coherent(&ioc->pdev->dev,
4164                       ioc->diag_buffer_sz[i],
4165                       ioc->diag_buffer[i],
4166                       ioc->diag_buffer_dma[i]);
4167             ioc->diag_buffer[i] = NULL;
4168             ioc->diag_buffer_status[i] = 0;
4169         }
4170
4171         kfree(ioc->event_log);
4172     }
4173     if (hbas_to_enumerate != 1)
4174         misc_deregister(&ctl_dev);
4175     if (hbas_to_enumerate != 2)
4176         misc_deregister(&gen2_ctl_dev);
4177 }