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0001 /*
0002  * PMC-Sierra PM8001/8081/8088/8089 SAS/SATA based host adapters driver
0003  *
0004  * Copyright (c) 2008-2009 USI Co., Ltd.
0005  * All rights reserved.
0006  *
0007  * Redistribution and use in source and binary forms, with or without
0008  * modification, are permitted provided that the following conditions
0009  * are met:
0010  * 1. Redistributions of source code must retain the above copyright
0011  *    notice, this list of conditions, and the following disclaimer,
0012  *    without modification.
0013  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
0014  *    substantially similar to the "NO WARRANTY" disclaimer below
0015  *    ("Disclaimer") and any redistribution must be conditioned upon
0016  *    including a substantially similar Disclaimer requirement for further
0017  *    binary redistribution.
0018  * 3. Neither the names of the above-listed copyright holders nor the names
0019  *    of any contributors may be used to endorse or promote products derived
0020  *    from this software without specific prior written permission.
0021  *
0022  * Alternatively, this software may be distributed under the terms of the
0023  * GNU General Public License ("GPL") version 2 as published by the Free
0024  * Software Foundation.
0025  *
0026  * NO WARRANTY
0027  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
0028  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
0029  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
0030  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
0031  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
0032  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
0033  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
0034  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
0035  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
0036  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0037  * POSSIBILITY OF SUCH DAMAGES.
0038  *
0039  */
0040 
0041 #include <linux/slab.h>
0042 #include "pm8001_sas.h"
0043 #include "pm80xx_tracepoints.h"
0044 
0045 /**
0046  * pm8001_find_tag - from sas task to find out  tag that belongs to this task
0047  * @task: the task sent to the LLDD
0048  * @tag: the found tag associated with the task
0049  */
0050 static int pm8001_find_tag(struct sas_task *task, u32 *tag)
0051 {
0052     if (task->lldd_task) {
0053         struct pm8001_ccb_info *ccb;
0054         ccb = task->lldd_task;
0055         *tag = ccb->ccb_tag;
0056         return 1;
0057     }
0058     return 0;
0059 }
0060 
0061 /**
0062   * pm8001_tag_free - free the no more needed tag
0063   * @pm8001_ha: our hba struct
0064   * @tag: the found tag associated with the task
0065   */
0066 void pm8001_tag_free(struct pm8001_hba_info *pm8001_ha, u32 tag)
0067 {
0068     void *bitmap = pm8001_ha->tags;
0069     unsigned long flags;
0070 
0071     spin_lock_irqsave(&pm8001_ha->bitmap_lock, flags);
0072     __clear_bit(tag, bitmap);
0073     spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags);
0074 }
0075 
0076 /**
0077   * pm8001_tag_alloc - allocate a empty tag for task used.
0078   * @pm8001_ha: our hba struct
0079   * @tag_out: the found empty tag .
0080   */
0081 int pm8001_tag_alloc(struct pm8001_hba_info *pm8001_ha, u32 *tag_out)
0082 {
0083     void *bitmap = pm8001_ha->tags;
0084     unsigned long flags;
0085     unsigned int tag;
0086 
0087     spin_lock_irqsave(&pm8001_ha->bitmap_lock, flags);
0088     tag = find_first_zero_bit(bitmap, pm8001_ha->tags_num);
0089     if (tag >= pm8001_ha->tags_num) {
0090         spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags);
0091         return -SAS_QUEUE_FULL;
0092     }
0093     __set_bit(tag, bitmap);
0094     spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags);
0095     *tag_out = tag;
0096     return 0;
0097 }
0098 
0099 void pm8001_tag_init(struct pm8001_hba_info *pm8001_ha)
0100 {
0101     int i;
0102     for (i = 0; i < pm8001_ha->tags_num; ++i)
0103         pm8001_tag_free(pm8001_ha, i);
0104 }
0105 
0106 /**
0107  * pm8001_mem_alloc - allocate memory for pm8001.
0108  * @pdev: pci device.
0109  * @virt_addr: the allocated virtual address
0110  * @pphys_addr: DMA address for this device
0111  * @pphys_addr_hi: the physical address high byte address.
0112  * @pphys_addr_lo: the physical address low byte address.
0113  * @mem_size: memory size.
0114  * @align: requested byte alignment
0115  */
0116 int pm8001_mem_alloc(struct pci_dev *pdev, void **virt_addr,
0117     dma_addr_t *pphys_addr, u32 *pphys_addr_hi,
0118     u32 *pphys_addr_lo, u32 mem_size, u32 align)
0119 {
0120     caddr_t mem_virt_alloc;
0121     dma_addr_t mem_dma_handle;
0122     u64 phys_align;
0123     u64 align_offset = 0;
0124     if (align)
0125         align_offset = (dma_addr_t)align - 1;
0126     mem_virt_alloc = dma_alloc_coherent(&pdev->dev, mem_size + align,
0127                         &mem_dma_handle, GFP_KERNEL);
0128     if (!mem_virt_alloc)
0129         return -ENOMEM;
0130     *pphys_addr = mem_dma_handle;
0131     phys_align = (*pphys_addr + align_offset) & ~align_offset;
0132     *virt_addr = (void *)mem_virt_alloc + phys_align - *pphys_addr;
0133     *pphys_addr_hi = upper_32_bits(phys_align);
0134     *pphys_addr_lo = lower_32_bits(phys_align);
0135     return 0;
0136 }
0137 
0138 /**
0139   * pm8001_find_ha_by_dev - from domain device which come from sas layer to
0140   * find out our hba struct.
0141   * @dev: the domain device which from sas layer.
0142   */
0143 static
0144 struct pm8001_hba_info *pm8001_find_ha_by_dev(struct domain_device *dev)
0145 {
0146     struct sas_ha_struct *sha = dev->port->ha;
0147     struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
0148     return pm8001_ha;
0149 }
0150 
0151 /**
0152   * pm8001_phy_control - this function should be registered to
0153   * sas_domain_function_template to provide libsas used, note: this is just
0154   * control the HBA phy rather than other expander phy if you want control
0155   * other phy, you should use SMP command.
0156   * @sas_phy: which phy in HBA phys.
0157   * @func: the operation.
0158   * @funcdata: always NULL.
0159   */
0160 int pm8001_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func,
0161     void *funcdata)
0162 {
0163     int rc = 0, phy_id = sas_phy->id;
0164     struct pm8001_hba_info *pm8001_ha = NULL;
0165     struct sas_phy_linkrates *rates;
0166     struct pm8001_phy *phy;
0167     DECLARE_COMPLETION_ONSTACK(completion);
0168     unsigned long flags;
0169     pm8001_ha = sas_phy->ha->lldd_ha;
0170     phy = &pm8001_ha->phy[phy_id];
0171     pm8001_ha->phy[phy_id].enable_completion = &completion;
0172     switch (func) {
0173     case PHY_FUNC_SET_LINK_RATE:
0174         rates = funcdata;
0175         if (rates->minimum_linkrate) {
0176             pm8001_ha->phy[phy_id].minimum_linkrate =
0177                 rates->minimum_linkrate;
0178         }
0179         if (rates->maximum_linkrate) {
0180             pm8001_ha->phy[phy_id].maximum_linkrate =
0181                 rates->maximum_linkrate;
0182         }
0183         if (pm8001_ha->phy[phy_id].phy_state ==  PHY_LINK_DISABLE) {
0184             PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
0185             wait_for_completion(&completion);
0186         }
0187         PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
0188                           PHY_LINK_RESET);
0189         break;
0190     case PHY_FUNC_HARD_RESET:
0191         if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) {
0192             PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
0193             wait_for_completion(&completion);
0194         }
0195         PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
0196                           PHY_HARD_RESET);
0197         break;
0198     case PHY_FUNC_LINK_RESET:
0199         if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) {
0200             PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
0201             wait_for_completion(&completion);
0202         }
0203         PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
0204                           PHY_LINK_RESET);
0205         break;
0206     case PHY_FUNC_RELEASE_SPINUP_HOLD:
0207         PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
0208                           PHY_LINK_RESET);
0209         break;
0210     case PHY_FUNC_DISABLE:
0211         if (pm8001_ha->chip_id != chip_8001) {
0212             if (pm8001_ha->phy[phy_id].phy_state ==
0213                 PHY_STATE_LINK_UP_SPCV) {
0214                 sas_phy_disconnected(&phy->sas_phy);
0215                 sas_notify_phy_event(&phy->sas_phy,
0216                     PHYE_LOSS_OF_SIGNAL, GFP_KERNEL);
0217                 phy->phy_attached = 0;
0218             }
0219         } else {
0220             if (pm8001_ha->phy[phy_id].phy_state ==
0221                 PHY_STATE_LINK_UP_SPC) {
0222                 sas_phy_disconnected(&phy->sas_phy);
0223                 sas_notify_phy_event(&phy->sas_phy,
0224                     PHYE_LOSS_OF_SIGNAL, GFP_KERNEL);
0225                 phy->phy_attached = 0;
0226             }
0227         }
0228         PM8001_CHIP_DISP->phy_stop_req(pm8001_ha, phy_id);
0229         break;
0230     case PHY_FUNC_GET_EVENTS:
0231         spin_lock_irqsave(&pm8001_ha->lock, flags);
0232         if (pm8001_ha->chip_id == chip_8001) {
0233             if (-1 == pm8001_bar4_shift(pm8001_ha,
0234                     (phy_id < 4) ? 0x30000 : 0x40000)) {
0235                 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
0236                 return -EINVAL;
0237             }
0238         }
0239         {
0240             struct sas_phy *phy = sas_phy->phy;
0241             u32 __iomem *qp = pm8001_ha->io_mem[2].memvirtaddr
0242                 + 0x1034 + (0x4000 * (phy_id & 3));
0243 
0244             phy->invalid_dword_count = readl(qp);
0245             phy->running_disparity_error_count = readl(&qp[1]);
0246             phy->loss_of_dword_sync_count = readl(&qp[3]);
0247             phy->phy_reset_problem_count = readl(&qp[4]);
0248         }
0249         if (pm8001_ha->chip_id == chip_8001)
0250             pm8001_bar4_shift(pm8001_ha, 0);
0251         spin_unlock_irqrestore(&pm8001_ha->lock, flags);
0252         return 0;
0253     default:
0254         pm8001_dbg(pm8001_ha, DEVIO, "func 0x%x\n", func);
0255         rc = -EOPNOTSUPP;
0256     }
0257     msleep(300);
0258     return rc;
0259 }
0260 
0261 /**
0262   * pm8001_scan_start - we should enable all HBA phys by sending the phy_start
0263   * command to HBA.
0264   * @shost: the scsi host data.
0265   */
0266 void pm8001_scan_start(struct Scsi_Host *shost)
0267 {
0268     int i;
0269     struct pm8001_hba_info *pm8001_ha;
0270     struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
0271     DECLARE_COMPLETION_ONSTACK(completion);
0272     pm8001_ha = sha->lldd_ha;
0273     /* SAS_RE_INITIALIZATION not available in SPCv/ve */
0274     if (pm8001_ha->chip_id == chip_8001)
0275         PM8001_CHIP_DISP->sas_re_init_req(pm8001_ha);
0276     for (i = 0; i < pm8001_ha->chip->n_phy; ++i) {
0277         pm8001_ha->phy[i].enable_completion = &completion;
0278         PM8001_CHIP_DISP->phy_start_req(pm8001_ha, i);
0279         wait_for_completion(&completion);
0280         msleep(300);
0281     }
0282 }
0283 
0284 int pm8001_scan_finished(struct Scsi_Host *shost, unsigned long time)
0285 {
0286     struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
0287 
0288     /* give the phy enabling interrupt event time to come in (1s
0289     * is empirically about all it takes) */
0290     if (time < HZ)
0291         return 0;
0292     /* Wait for discovery to finish */
0293     sas_drain_work(ha);
0294     return 1;
0295 }
0296 
0297 /**
0298   * pm8001_task_prep_smp - the dispatcher function, prepare data for smp task
0299   * @pm8001_ha: our hba card information
0300   * @ccb: the ccb which attached to smp task
0301   */
0302 static int pm8001_task_prep_smp(struct pm8001_hba_info *pm8001_ha,
0303     struct pm8001_ccb_info *ccb)
0304 {
0305     return PM8001_CHIP_DISP->smp_req(pm8001_ha, ccb);
0306 }
0307 
0308 u32 pm8001_get_ncq_tag(struct sas_task *task, u32 *tag)
0309 {
0310     struct ata_queued_cmd *qc = task->uldd_task;
0311 
0312     if (qc && ata_is_ncq(qc->tf.protocol)) {
0313         *tag = qc->tag;
0314         return 1;
0315     }
0316 
0317     return 0;
0318 }
0319 
0320 /**
0321   * pm8001_task_prep_ata - the dispatcher function, prepare data for sata task
0322   * @pm8001_ha: our hba card information
0323   * @ccb: the ccb which attached to sata task
0324   */
0325 static int pm8001_task_prep_ata(struct pm8001_hba_info *pm8001_ha,
0326     struct pm8001_ccb_info *ccb)
0327 {
0328     return PM8001_CHIP_DISP->sata_req(pm8001_ha, ccb);
0329 }
0330 
0331 /**
0332   * pm8001_task_prep_internal_abort - the dispatcher function, prepare data
0333   *                   for internal abort task
0334   * @pm8001_ha: our hba card information
0335   * @ccb: the ccb which attached to sata task
0336   */
0337 static int pm8001_task_prep_internal_abort(struct pm8001_hba_info *pm8001_ha,
0338                        struct pm8001_ccb_info *ccb)
0339 {
0340     return PM8001_CHIP_DISP->task_abort(pm8001_ha, ccb);
0341 }
0342 
0343 /**
0344   * pm8001_task_prep_ssp_tm - the dispatcher function, prepare task management data
0345   * @pm8001_ha: our hba card information
0346   * @ccb: the ccb which attached to TM
0347   * @tmf: the task management IU
0348   */
0349 static int pm8001_task_prep_ssp_tm(struct pm8001_hba_info *pm8001_ha,
0350     struct pm8001_ccb_info *ccb, struct sas_tmf_task *tmf)
0351 {
0352     return PM8001_CHIP_DISP->ssp_tm_req(pm8001_ha, ccb, tmf);
0353 }
0354 
0355 /**
0356   * pm8001_task_prep_ssp - the dispatcher function, prepare ssp data for ssp task
0357   * @pm8001_ha: our hba card information
0358   * @ccb: the ccb which attached to ssp task
0359   */
0360 static int pm8001_task_prep_ssp(struct pm8001_hba_info *pm8001_ha,
0361     struct pm8001_ccb_info *ccb)
0362 {
0363     return PM8001_CHIP_DISP->ssp_io_req(pm8001_ha, ccb);
0364 }
0365 
0366  /* Find the local port id that's attached to this device */
0367 static int sas_find_local_port_id(struct domain_device *dev)
0368 {
0369     struct domain_device *pdev = dev->parent;
0370 
0371     /* Directly attached device */
0372     if (!pdev)
0373         return dev->port->id;
0374     while (pdev) {
0375         struct domain_device *pdev_p = pdev->parent;
0376         if (!pdev_p)
0377             return pdev->port->id;
0378         pdev = pdev->parent;
0379     }
0380     return 0;
0381 }
0382 
0383 #define DEV_IS_GONE(pm8001_dev) \
0384     ((!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED)))
0385 
0386 
0387 static int pm8001_deliver_command(struct pm8001_hba_info *pm8001_ha,
0388                   struct pm8001_ccb_info *ccb)
0389 {
0390     struct sas_task *task = ccb->task;
0391     enum sas_protocol task_proto = task->task_proto;
0392     struct sas_tmf_task *tmf = task->tmf;
0393     int is_tmf = !!tmf;
0394 
0395     switch (task_proto) {
0396     case SAS_PROTOCOL_SMP:
0397         return pm8001_task_prep_smp(pm8001_ha, ccb);
0398     case SAS_PROTOCOL_SSP:
0399         if (is_tmf)
0400             return pm8001_task_prep_ssp_tm(pm8001_ha, ccb, tmf);
0401         return pm8001_task_prep_ssp(pm8001_ha, ccb);
0402     case SAS_PROTOCOL_SATA:
0403     case SAS_PROTOCOL_STP:
0404         return pm8001_task_prep_ata(pm8001_ha, ccb);
0405     case SAS_PROTOCOL_INTERNAL_ABORT:
0406         return pm8001_task_prep_internal_abort(pm8001_ha, ccb);
0407     default:
0408         dev_err(pm8001_ha->dev, "unknown sas_task proto: 0x%x\n",
0409             task_proto);
0410     }
0411 
0412     return -EINVAL;
0413 }
0414 
0415 /**
0416   * pm8001_queue_command - register for upper layer used, all IO commands sent
0417   * to HBA are from this interface.
0418   * @task: the task to be execute.
0419   * @gfp_flags: gfp_flags
0420   */
0421 int pm8001_queue_command(struct sas_task *task, gfp_t gfp_flags)
0422 {
0423     struct task_status_struct *ts = &task->task_status;
0424     enum sas_protocol task_proto = task->task_proto;
0425     struct domain_device *dev = task->dev;
0426     struct pm8001_device *pm8001_dev = dev->lldd_dev;
0427     bool internal_abort = sas_is_internal_abort(task);
0428     struct pm8001_hba_info *pm8001_ha;
0429     struct pm8001_port *port = NULL;
0430     struct pm8001_ccb_info *ccb;
0431     unsigned long flags;
0432     u32 n_elem = 0;
0433     int rc = 0;
0434 
0435     if (!internal_abort && !dev->port) {
0436         ts->resp = SAS_TASK_UNDELIVERED;
0437         ts->stat = SAS_PHY_DOWN;
0438         if (dev->dev_type != SAS_SATA_DEV)
0439             task->task_done(task);
0440         return 0;
0441     }
0442 
0443     pm8001_ha = pm8001_find_ha_by_dev(dev);
0444     if (pm8001_ha->controller_fatal_error) {
0445         ts->resp = SAS_TASK_UNDELIVERED;
0446         task->task_done(task);
0447         return 0;
0448     }
0449 
0450     pm8001_dbg(pm8001_ha, IO, "pm8001_task_exec device\n");
0451 
0452     spin_lock_irqsave(&pm8001_ha->lock, flags);
0453 
0454     pm8001_dev = dev->lldd_dev;
0455     port = &pm8001_ha->port[sas_find_local_port_id(dev)];
0456 
0457     if (!internal_abort &&
0458         (DEV_IS_GONE(pm8001_dev) || !port->port_attached)) {
0459         ts->resp = SAS_TASK_UNDELIVERED;
0460         ts->stat = SAS_PHY_DOWN;
0461         if (sas_protocol_ata(task_proto)) {
0462             spin_unlock_irqrestore(&pm8001_ha->lock, flags);
0463             task->task_done(task);
0464             spin_lock_irqsave(&pm8001_ha->lock, flags);
0465         } else {
0466             task->task_done(task);
0467         }
0468         rc = -ENODEV;
0469         goto err_out;
0470     }
0471 
0472     ccb = pm8001_ccb_alloc(pm8001_ha, pm8001_dev, task);
0473     if (!ccb) {
0474         rc = -SAS_QUEUE_FULL;
0475         goto err_out;
0476     }
0477 
0478     if (!sas_protocol_ata(task_proto)) {
0479         if (task->num_scatter) {
0480             n_elem = dma_map_sg(pm8001_ha->dev, task->scatter,
0481                         task->num_scatter, task->data_dir);
0482             if (!n_elem) {
0483                 rc = -ENOMEM;
0484                 goto err_out_ccb;
0485             }
0486         }
0487     } else {
0488         n_elem = task->num_scatter;
0489     }
0490 
0491     task->lldd_task = ccb;
0492     ccb->n_elem = n_elem;
0493 
0494     atomic_inc(&pm8001_dev->running_req);
0495 
0496     rc = pm8001_deliver_command(pm8001_ha, ccb);
0497     if (rc) {
0498         atomic_dec(&pm8001_dev->running_req);
0499         if (!sas_protocol_ata(task_proto) && n_elem)
0500             dma_unmap_sg(pm8001_ha->dev, task->scatter,
0501                      task->num_scatter, task->data_dir);
0502 err_out_ccb:
0503         pm8001_ccb_free(pm8001_ha, ccb);
0504 
0505 err_out:
0506         pm8001_dbg(pm8001_ha, IO, "pm8001_task_exec failed[%d]!\n", rc);
0507     }
0508 
0509     spin_unlock_irqrestore(&pm8001_ha->lock, flags);
0510 
0511     return rc;
0512 }
0513 
0514 /**
0515   * pm8001_ccb_task_free - free the sg for ssp and smp command, free the ccb.
0516   * @pm8001_ha: our hba card information
0517   * @ccb: the ccb which attached to ssp task to free
0518   */
0519 void pm8001_ccb_task_free(struct pm8001_hba_info *pm8001_ha,
0520               struct pm8001_ccb_info *ccb)
0521 {
0522     struct sas_task *task = ccb->task;
0523     struct ata_queued_cmd *qc;
0524     struct pm8001_device *pm8001_dev;
0525 
0526     if (!task)
0527         return;
0528 
0529     if (!sas_protocol_ata(task->task_proto) && ccb->n_elem)
0530         dma_unmap_sg(pm8001_ha->dev, task->scatter,
0531                  task->num_scatter, task->data_dir);
0532 
0533     switch (task->task_proto) {
0534     case SAS_PROTOCOL_SMP:
0535         dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_resp, 1,
0536             DMA_FROM_DEVICE);
0537         dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_req, 1,
0538             DMA_TO_DEVICE);
0539         break;
0540 
0541     case SAS_PROTOCOL_SATA:
0542     case SAS_PROTOCOL_STP:
0543     case SAS_PROTOCOL_SSP:
0544     default:
0545         /* do nothing */
0546         break;
0547     }
0548 
0549     if (sas_protocol_ata(task->task_proto)) {
0550         /* For SCSI/ATA commands uldd_task points to ata_queued_cmd */
0551         qc = task->uldd_task;
0552         pm8001_dev = ccb->device;
0553         trace_pm80xx_request_complete(pm8001_ha->id,
0554             pm8001_dev ? pm8001_dev->attached_phy : PM8001_MAX_PHYS,
0555             ccb->ccb_tag, 0 /* ctlr_opcode not known */,
0556             qc ? qc->tf.command : 0, // ata opcode
0557             pm8001_dev ? atomic_read(&pm8001_dev->running_req) : -1);
0558     }
0559 
0560     task->lldd_task = NULL;
0561     pm8001_ccb_free(pm8001_ha, ccb);
0562 }
0563 
0564 /**
0565  * pm8001_alloc_dev - find a empty pm8001_device
0566  * @pm8001_ha: our hba card information
0567  */
0568 static struct pm8001_device *pm8001_alloc_dev(struct pm8001_hba_info *pm8001_ha)
0569 {
0570     u32 dev;
0571     for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
0572         if (pm8001_ha->devices[dev].dev_type == SAS_PHY_UNUSED) {
0573             pm8001_ha->devices[dev].id = dev;
0574             return &pm8001_ha->devices[dev];
0575         }
0576     }
0577     if (dev == PM8001_MAX_DEVICES) {
0578         pm8001_dbg(pm8001_ha, FAIL,
0579                "max support %d devices, ignore ..\n",
0580                PM8001_MAX_DEVICES);
0581     }
0582     return NULL;
0583 }
0584 /**
0585   * pm8001_find_dev - find a matching pm8001_device
0586   * @pm8001_ha: our hba card information
0587   * @device_id: device ID to match against
0588   */
0589 struct pm8001_device *pm8001_find_dev(struct pm8001_hba_info *pm8001_ha,
0590                     u32 device_id)
0591 {
0592     u32 dev;
0593     for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
0594         if (pm8001_ha->devices[dev].device_id == device_id)
0595             return &pm8001_ha->devices[dev];
0596     }
0597     if (dev == PM8001_MAX_DEVICES) {
0598         pm8001_dbg(pm8001_ha, FAIL, "NO MATCHING DEVICE FOUND !!!\n");
0599     }
0600     return NULL;
0601 }
0602 
0603 void pm8001_free_dev(struct pm8001_device *pm8001_dev)
0604 {
0605     u32 id = pm8001_dev->id;
0606     memset(pm8001_dev, 0, sizeof(*pm8001_dev));
0607     pm8001_dev->id = id;
0608     pm8001_dev->dev_type = SAS_PHY_UNUSED;
0609     pm8001_dev->device_id = PM8001_MAX_DEVICES;
0610     pm8001_dev->sas_device = NULL;
0611 }
0612 
0613 /**
0614   * pm8001_dev_found_notify - libsas notify a device is found.
0615   * @dev: the device structure which sas layer used.
0616   *
0617   * when libsas find a sas domain device, it should tell the LLDD that
0618   * device is found, and then LLDD register this device to HBA firmware
0619   * by the command "OPC_INB_REG_DEV", after that the HBA will assign a
0620   * device ID(according to device's sas address) and returned it to LLDD. From
0621   * now on, we communicate with HBA FW with the device ID which HBA assigned
0622   * rather than sas address. it is the necessary step for our HBA but it is
0623   * the optional for other HBA driver.
0624   */
0625 static int pm8001_dev_found_notify(struct domain_device *dev)
0626 {
0627     unsigned long flags = 0;
0628     int res = 0;
0629     struct pm8001_hba_info *pm8001_ha = NULL;
0630     struct domain_device *parent_dev = dev->parent;
0631     struct pm8001_device *pm8001_device;
0632     DECLARE_COMPLETION_ONSTACK(completion);
0633     u32 flag = 0;
0634     pm8001_ha = pm8001_find_ha_by_dev(dev);
0635     spin_lock_irqsave(&pm8001_ha->lock, flags);
0636 
0637     pm8001_device = pm8001_alloc_dev(pm8001_ha);
0638     if (!pm8001_device) {
0639         res = -1;
0640         goto found_out;
0641     }
0642     pm8001_device->sas_device = dev;
0643     dev->lldd_dev = pm8001_device;
0644     pm8001_device->dev_type = dev->dev_type;
0645     pm8001_device->dcompletion = &completion;
0646     if (parent_dev && dev_is_expander(parent_dev->dev_type)) {
0647         int phy_id;
0648         struct ex_phy *phy;
0649         for (phy_id = 0; phy_id < parent_dev->ex_dev.num_phys;
0650         phy_id++) {
0651             phy = &parent_dev->ex_dev.ex_phy[phy_id];
0652             if (SAS_ADDR(phy->attached_sas_addr)
0653                 == SAS_ADDR(dev->sas_addr)) {
0654                 pm8001_device->attached_phy = phy_id;
0655                 break;
0656             }
0657         }
0658         if (phy_id == parent_dev->ex_dev.num_phys) {
0659             pm8001_dbg(pm8001_ha, FAIL,
0660                    "Error: no attached dev:%016llx at ex:%016llx.\n",
0661                    SAS_ADDR(dev->sas_addr),
0662                    SAS_ADDR(parent_dev->sas_addr));
0663             res = -1;
0664         }
0665     } else {
0666         if (dev->dev_type == SAS_SATA_DEV) {
0667             pm8001_device->attached_phy =
0668                 dev->rphy->identify.phy_identifier;
0669             flag = 1; /* directly sata */
0670         }
0671     } /*register this device to HBA*/
0672     pm8001_dbg(pm8001_ha, DISC, "Found device\n");
0673     PM8001_CHIP_DISP->reg_dev_req(pm8001_ha, pm8001_device, flag);
0674     spin_unlock_irqrestore(&pm8001_ha->lock, flags);
0675     wait_for_completion(&completion);
0676     if (dev->dev_type == SAS_END_DEVICE)
0677         msleep(50);
0678     pm8001_ha->flags = PM8001F_RUN_TIME;
0679     return 0;
0680 found_out:
0681     spin_unlock_irqrestore(&pm8001_ha->lock, flags);
0682     return res;
0683 }
0684 
0685 int pm8001_dev_found(struct domain_device *dev)
0686 {
0687     return pm8001_dev_found_notify(dev);
0688 }
0689 
0690 void pm8001_task_done(struct sas_task *task)
0691 {
0692     del_timer(&task->slow_task->timer);
0693     complete(&task->slow_task->completion);
0694 }
0695 
0696 #define PM8001_TASK_TIMEOUT 20
0697 
0698 /**
0699   * pm8001_dev_gone_notify - see the comments for "pm8001_dev_found_notify"
0700   * @dev: the device structure which sas layer used.
0701   */
0702 static void pm8001_dev_gone_notify(struct domain_device *dev)
0703 {
0704     unsigned long flags = 0;
0705     struct pm8001_hba_info *pm8001_ha;
0706     struct pm8001_device *pm8001_dev = dev->lldd_dev;
0707 
0708     pm8001_ha = pm8001_find_ha_by_dev(dev);
0709     spin_lock_irqsave(&pm8001_ha->lock, flags);
0710     if (pm8001_dev) {
0711         u32 device_id = pm8001_dev->device_id;
0712 
0713         pm8001_dbg(pm8001_ha, DISC, "found dev[%d:%x] is gone.\n",
0714                pm8001_dev->device_id, pm8001_dev->dev_type);
0715         if (atomic_read(&pm8001_dev->running_req)) {
0716             spin_unlock_irqrestore(&pm8001_ha->lock, flags);
0717             sas_execute_internal_abort_dev(dev, 0, NULL);
0718             while (atomic_read(&pm8001_dev->running_req))
0719                 msleep(20);
0720             spin_lock_irqsave(&pm8001_ha->lock, flags);
0721         }
0722         PM8001_CHIP_DISP->dereg_dev_req(pm8001_ha, device_id);
0723         pm8001_free_dev(pm8001_dev);
0724     } else {
0725         pm8001_dbg(pm8001_ha, DISC, "Found dev has gone.\n");
0726     }
0727     dev->lldd_dev = NULL;
0728     spin_unlock_irqrestore(&pm8001_ha->lock, flags);
0729 }
0730 
0731 void pm8001_dev_gone(struct domain_device *dev)
0732 {
0733     pm8001_dev_gone_notify(dev);
0734 }
0735 
0736 /* retry commands by ha, by task and/or by device */
0737 void pm8001_open_reject_retry(
0738     struct pm8001_hba_info *pm8001_ha,
0739     struct sas_task *task_to_close,
0740     struct pm8001_device *device_to_close)
0741 {
0742     int i;
0743     unsigned long flags;
0744 
0745     if (pm8001_ha == NULL)
0746         return;
0747 
0748     spin_lock_irqsave(&pm8001_ha->lock, flags);
0749 
0750     for (i = 0; i < PM8001_MAX_CCB; i++) {
0751         struct sas_task *task;
0752         struct task_status_struct *ts;
0753         struct pm8001_device *pm8001_dev;
0754         unsigned long flags1;
0755         struct pm8001_ccb_info *ccb = &pm8001_ha->ccb_info[i];
0756 
0757         if (ccb->ccb_tag == PM8001_INVALID_TAG)
0758             continue;
0759 
0760         pm8001_dev = ccb->device;
0761         if (!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED))
0762             continue;
0763         if (!device_to_close) {
0764             uintptr_t d = (uintptr_t)pm8001_dev
0765                     - (uintptr_t)&pm8001_ha->devices;
0766             if (((d % sizeof(*pm8001_dev)) != 0)
0767              || ((d / sizeof(*pm8001_dev)) >= PM8001_MAX_DEVICES))
0768                 continue;
0769         } else if (pm8001_dev != device_to_close)
0770             continue;
0771         task = ccb->task;
0772         if (!task || !task->task_done)
0773             continue;
0774         if (task_to_close && (task != task_to_close))
0775             continue;
0776         ts = &task->task_status;
0777         ts->resp = SAS_TASK_COMPLETE;
0778         /* Force the midlayer to retry */
0779         ts->stat = SAS_OPEN_REJECT;
0780         ts->open_rej_reason = SAS_OREJ_RSVD_RETRY;
0781         if (pm8001_dev)
0782             atomic_dec(&pm8001_dev->running_req);
0783         spin_lock_irqsave(&task->task_state_lock, flags1);
0784         task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
0785         task->task_state_flags |= SAS_TASK_STATE_DONE;
0786         if (unlikely((task->task_state_flags
0787                 & SAS_TASK_STATE_ABORTED))) {
0788             spin_unlock_irqrestore(&task->task_state_lock,
0789                 flags1);
0790             pm8001_ccb_task_free(pm8001_ha, ccb);
0791         } else {
0792             spin_unlock_irqrestore(&task->task_state_lock,
0793                 flags1);
0794             pm8001_ccb_task_free(pm8001_ha, ccb);
0795             mb();/* in order to force CPU ordering */
0796             spin_unlock_irqrestore(&pm8001_ha->lock, flags);
0797             task->task_done(task);
0798             spin_lock_irqsave(&pm8001_ha->lock, flags);
0799         }
0800     }
0801 
0802     spin_unlock_irqrestore(&pm8001_ha->lock, flags);
0803 }
0804 
0805 /**
0806  * pm8001_I_T_nexus_reset() - reset the initiator/target connection
0807  * @dev: the device structure for the device to reset.
0808  *
0809  * Standard mandates link reset for ATA (type 0) and hard reset for
0810  * SSP (type 1), only for RECOVERY
0811  */
0812 int pm8001_I_T_nexus_reset(struct domain_device *dev)
0813 {
0814     int rc = TMF_RESP_FUNC_FAILED;
0815     struct pm8001_device *pm8001_dev;
0816     struct pm8001_hba_info *pm8001_ha;
0817     struct sas_phy *phy;
0818 
0819     if (!dev || !dev->lldd_dev)
0820         return -ENODEV;
0821 
0822     pm8001_dev = dev->lldd_dev;
0823     pm8001_ha = pm8001_find_ha_by_dev(dev);
0824     phy = sas_get_local_phy(dev);
0825 
0826     if (dev_is_sata(dev)) {
0827         if (scsi_is_sas_phy_local(phy)) {
0828             rc = 0;
0829             goto out;
0830         }
0831         rc = sas_phy_reset(phy, 1);
0832         if (rc) {
0833             pm8001_dbg(pm8001_ha, EH,
0834                    "phy reset failed for device %x\n"
0835                    "with rc %d\n", pm8001_dev->device_id, rc);
0836             rc = TMF_RESP_FUNC_FAILED;
0837             goto out;
0838         }
0839         msleep(2000);
0840         rc = sas_execute_internal_abort_dev(dev, 0, NULL);
0841         if (rc) {
0842             pm8001_dbg(pm8001_ha, EH, "task abort failed %x\n"
0843                    "with rc %d\n", pm8001_dev->device_id, rc);
0844             rc = TMF_RESP_FUNC_FAILED;
0845         }
0846     } else {
0847         rc = sas_phy_reset(phy, 1);
0848         msleep(2000);
0849     }
0850     pm8001_dbg(pm8001_ha, EH, " for device[%x]:rc=%d\n",
0851            pm8001_dev->device_id, rc);
0852  out:
0853     sas_put_local_phy(phy);
0854     return rc;
0855 }
0856 
0857 /*
0858 * This function handle the IT_NEXUS_XXX event or completion
0859 * status code for SSP/SATA/SMP I/O request.
0860 */
0861 int pm8001_I_T_nexus_event_handler(struct domain_device *dev)
0862 {
0863     int rc = TMF_RESP_FUNC_FAILED;
0864     struct pm8001_device *pm8001_dev;
0865     struct pm8001_hba_info *pm8001_ha;
0866     struct sas_phy *phy;
0867 
0868     if (!dev || !dev->lldd_dev)
0869         return -1;
0870 
0871     pm8001_dev = dev->lldd_dev;
0872     pm8001_ha = pm8001_find_ha_by_dev(dev);
0873 
0874     pm8001_dbg(pm8001_ha, EH, "I_T_Nexus handler invoked !!\n");
0875 
0876     phy = sas_get_local_phy(dev);
0877 
0878     if (dev_is_sata(dev)) {
0879         DECLARE_COMPLETION_ONSTACK(completion_setstate);
0880         if (scsi_is_sas_phy_local(phy)) {
0881             rc = 0;
0882             goto out;
0883         }
0884         /* send internal ssp/sata/smp abort command to FW */
0885         sas_execute_internal_abort_dev(dev, 0, NULL);
0886         msleep(100);
0887 
0888         /* deregister the target device */
0889         pm8001_dev_gone_notify(dev);
0890         msleep(200);
0891 
0892         /*send phy reset to hard reset target */
0893         rc = sas_phy_reset(phy, 1);
0894         msleep(2000);
0895         pm8001_dev->setds_completion = &completion_setstate;
0896 
0897         wait_for_completion(&completion_setstate);
0898     } else {
0899         /* send internal ssp/sata/smp abort command to FW */
0900         sas_execute_internal_abort_dev(dev, 0, NULL);
0901         msleep(100);
0902 
0903         /* deregister the target device */
0904         pm8001_dev_gone_notify(dev);
0905         msleep(200);
0906 
0907         /*send phy reset to hard reset target */
0908         rc = sas_phy_reset(phy, 1);
0909         msleep(2000);
0910     }
0911     pm8001_dbg(pm8001_ha, EH, " for device[%x]:rc=%d\n",
0912            pm8001_dev->device_id, rc);
0913 out:
0914     sas_put_local_phy(phy);
0915 
0916     return rc;
0917 }
0918 /* mandatory SAM-3, the task reset the specified LUN*/
0919 int pm8001_lu_reset(struct domain_device *dev, u8 *lun)
0920 {
0921     int rc = TMF_RESP_FUNC_FAILED;
0922     struct pm8001_device *pm8001_dev = dev->lldd_dev;
0923     struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
0924     DECLARE_COMPLETION_ONSTACK(completion_setstate);
0925     if (dev_is_sata(dev)) {
0926         struct sas_phy *phy = sas_get_local_phy(dev);
0927         sas_execute_internal_abort_dev(dev, 0, NULL);
0928         rc = sas_phy_reset(phy, 1);
0929         sas_put_local_phy(phy);
0930         pm8001_dev->setds_completion = &completion_setstate;
0931         rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
0932             pm8001_dev, DS_OPERATIONAL);
0933         wait_for_completion(&completion_setstate);
0934     } else {
0935         rc = sas_lu_reset(dev, lun);
0936     }
0937     /* If failed, fall-through I_T_Nexus reset */
0938     pm8001_dbg(pm8001_ha, EH, "for device[%x]:rc=%d\n",
0939            pm8001_dev->device_id, rc);
0940     return rc;
0941 }
0942 
0943 /* optional SAM-3 */
0944 int pm8001_query_task(struct sas_task *task)
0945 {
0946     u32 tag = 0xdeadbeef;
0947     int rc = TMF_RESP_FUNC_FAILED;
0948     if (unlikely(!task || !task->lldd_task || !task->dev))
0949         return rc;
0950 
0951     if (task->task_proto & SAS_PROTOCOL_SSP) {
0952         struct scsi_cmnd *cmnd = task->uldd_task;
0953         struct domain_device *dev = task->dev;
0954         struct pm8001_hba_info *pm8001_ha =
0955             pm8001_find_ha_by_dev(dev);
0956 
0957         rc = pm8001_find_tag(task, &tag);
0958         if (rc == 0) {
0959             rc = TMF_RESP_FUNC_FAILED;
0960             return rc;
0961         }
0962         pm8001_dbg(pm8001_ha, EH, "Query:[%16ph]\n", cmnd->cmnd);
0963 
0964         rc = sas_query_task(task, tag);
0965         switch (rc) {
0966         /* The task is still in Lun, release it then */
0967         case TMF_RESP_FUNC_SUCC:
0968             pm8001_dbg(pm8001_ha, EH,
0969                    "The task is still in Lun\n");
0970             break;
0971         /* The task is not in Lun or failed, reset the phy */
0972         case TMF_RESP_FUNC_FAILED:
0973         case TMF_RESP_FUNC_COMPLETE:
0974             pm8001_dbg(pm8001_ha, EH,
0975                    "The task is not in Lun or failed, reset the phy\n");
0976             break;
0977         }
0978     }
0979     pr_err("pm80xx: rc= %d\n", rc);
0980     return rc;
0981 }
0982 
0983 /*  mandatory SAM-3, still need free task/ccb info, abort the specified task */
0984 int pm8001_abort_task(struct sas_task *task)
0985 {
0986     unsigned long flags;
0987     u32 tag;
0988     struct domain_device *dev ;
0989     struct pm8001_hba_info *pm8001_ha;
0990     struct pm8001_device *pm8001_dev;
0991     int rc = TMF_RESP_FUNC_FAILED, ret;
0992     u32 phy_id, port_id;
0993     struct sas_task_slow slow_task;
0994 
0995     if (unlikely(!task || !task->lldd_task || !task->dev))
0996         return TMF_RESP_FUNC_FAILED;
0997 
0998     dev = task->dev;
0999     pm8001_dev = dev->lldd_dev;
1000     pm8001_ha = pm8001_find_ha_by_dev(dev);
1001     phy_id = pm8001_dev->attached_phy;
1002 
1003     if (PM8001_CHIP_DISP->fatal_errors(pm8001_ha)) {
1004         // If the controller is seeing fatal errors
1005         // abort task will not get a response from the controller
1006         return TMF_RESP_FUNC_FAILED;
1007     }
1008 
1009     ret = pm8001_find_tag(task, &tag);
1010     if (ret == 0) {
1011         pm8001_info(pm8001_ha, "no tag for task:%p\n", task);
1012         return TMF_RESP_FUNC_FAILED;
1013     }
1014     spin_lock_irqsave(&task->task_state_lock, flags);
1015     if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1016         spin_unlock_irqrestore(&task->task_state_lock, flags);
1017         return TMF_RESP_FUNC_COMPLETE;
1018     }
1019     task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1020     if (task->slow_task == NULL) {
1021         init_completion(&slow_task.completion);
1022         task->slow_task = &slow_task;
1023     }
1024     spin_unlock_irqrestore(&task->task_state_lock, flags);
1025     if (task->task_proto & SAS_PROTOCOL_SSP) {
1026         rc = sas_abort_task(task, tag);
1027         sas_execute_internal_abort_single(dev, tag, 0, NULL);
1028     } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1029         task->task_proto & SAS_PROTOCOL_STP) {
1030         if (pm8001_ha->chip_id == chip_8006) {
1031             DECLARE_COMPLETION_ONSTACK(completion_reset);
1032             DECLARE_COMPLETION_ONSTACK(completion);
1033             struct pm8001_phy *phy = pm8001_ha->phy + phy_id;
1034             port_id = phy->port->port_id;
1035 
1036             /* 1. Set Device state as Recovery */
1037             pm8001_dev->setds_completion = &completion;
1038             PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1039                 pm8001_dev, DS_IN_RECOVERY);
1040             wait_for_completion(&completion);
1041 
1042             /* 2. Send Phy Control Hard Reset */
1043             reinit_completion(&completion);
1044             phy->port_reset_status = PORT_RESET_TMO;
1045             phy->reset_success = false;
1046             phy->enable_completion = &completion;
1047             phy->reset_completion = &completion_reset;
1048             ret = PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
1049                 PHY_HARD_RESET);
1050             if (ret) {
1051                 phy->enable_completion = NULL;
1052                 phy->reset_completion = NULL;
1053                 goto out;
1054             }
1055 
1056             /* In the case of the reset timeout/fail we still
1057              * abort the command at the firmware. The assumption
1058              * here is that the drive is off doing something so
1059              * that it's not processing requests, and we want to
1060              * avoid getting a completion for this and either
1061              * leaking the task in libsas or losing the race and
1062              * getting a double free.
1063              */
1064             pm8001_dbg(pm8001_ha, MSG,
1065                    "Waiting for local phy ctl\n");
1066             ret = wait_for_completion_timeout(&completion,
1067                     PM8001_TASK_TIMEOUT * HZ);
1068             if (!ret || !phy->reset_success) {
1069                 phy->enable_completion = NULL;
1070                 phy->reset_completion = NULL;
1071             } else {
1072                 /* 3. Wait for Port Reset complete or
1073                  * Port reset TMO
1074                  */
1075                 pm8001_dbg(pm8001_ha, MSG,
1076                        "Waiting for Port reset\n");
1077                 ret = wait_for_completion_timeout(
1078                     &completion_reset,
1079                     PM8001_TASK_TIMEOUT * HZ);
1080                 if (!ret)
1081                     phy->reset_completion = NULL;
1082                 WARN_ON(phy->port_reset_status ==
1083                         PORT_RESET_TMO);
1084                 if (phy->port_reset_status == PORT_RESET_TMO) {
1085                     pm8001_dev_gone_notify(dev);
1086                     PM8001_CHIP_DISP->hw_event_ack_req(
1087                         pm8001_ha, 0,
1088                         0x07, /*HW_EVENT_PHY_DOWN ack*/
1089                         port_id, phy_id, 0, 0);
1090                     goto out;
1091                 }
1092             }
1093 
1094             /*
1095              * 4. SATA Abort ALL
1096              * we wait for the task to be aborted so that the task
1097              * is removed from the ccb. on success the caller is
1098              * going to free the task.
1099              */
1100             ret = sas_execute_internal_abort_dev(dev, 0, NULL);
1101             if (ret)
1102                 goto out;
1103             ret = wait_for_completion_timeout(
1104                 &task->slow_task->completion,
1105                 PM8001_TASK_TIMEOUT * HZ);
1106             if (!ret)
1107                 goto out;
1108 
1109             /* 5. Set Device State as Operational */
1110             reinit_completion(&completion);
1111             pm8001_dev->setds_completion = &completion;
1112             PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1113                 pm8001_dev, DS_OPERATIONAL);
1114             wait_for_completion(&completion);
1115         } else {
1116             ret = sas_execute_internal_abort_single(dev, tag, 0, NULL);
1117         }
1118         rc = TMF_RESP_FUNC_COMPLETE;
1119     } else if (task->task_proto & SAS_PROTOCOL_SMP) {
1120         /* SMP */
1121         rc = sas_execute_internal_abort_single(dev, tag, 0, NULL);
1122 
1123     }
1124 out:
1125     spin_lock_irqsave(&task->task_state_lock, flags);
1126     if (task->slow_task == &slow_task)
1127         task->slow_task = NULL;
1128     spin_unlock_irqrestore(&task->task_state_lock, flags);
1129     if (rc != TMF_RESP_FUNC_COMPLETE)
1130         pm8001_info(pm8001_ha, "rc= %d\n", rc);
1131     return rc;
1132 }
1133 
1134 int pm8001_clear_task_set(struct domain_device *dev, u8 *lun)
1135 {
1136     struct pm8001_device *pm8001_dev = dev->lldd_dev;
1137     struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1138 
1139     pm8001_dbg(pm8001_ha, EH, "I_T_L_Q clear task set[%x]\n",
1140            pm8001_dev->device_id);
1141     return sas_clear_task_set(dev, lun);
1142 }
1143 
1144 void pm8001_port_formed(struct asd_sas_phy *sas_phy)
1145 {
1146     struct sas_ha_struct *sas_ha = sas_phy->ha;
1147     struct pm8001_hba_info *pm8001_ha = sas_ha->lldd_ha;
1148     struct pm8001_phy *phy = sas_phy->lldd_phy;
1149     struct asd_sas_port *sas_port = sas_phy->port;
1150     struct pm8001_port *port = phy->port;
1151 
1152     if (!sas_port) {
1153         pm8001_dbg(pm8001_ha, FAIL, "Received null port\n");
1154         return;
1155     }
1156     sas_port->lldd_port = port;
1157 }
1158 
1159 void pm8001_setds_completion(struct domain_device *dev)
1160 {
1161     struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1162     struct pm8001_device *pm8001_dev = dev->lldd_dev;
1163     DECLARE_COMPLETION_ONSTACK(completion_setstate);
1164 
1165     if (pm8001_ha->chip_id != chip_8001) {
1166         pm8001_dev->setds_completion = &completion_setstate;
1167         PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1168             pm8001_dev, DS_OPERATIONAL);
1169         wait_for_completion(&completion_setstate);
1170     }
1171 }
1172 
1173 void pm8001_tmf_aborted(struct sas_task *task)
1174 {
1175     struct pm8001_ccb_info *ccb = task->lldd_task;
1176 
1177     if (ccb)
1178         ccb->task = NULL;
1179 }
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