1198 lines · c
1/*2 * PMC-Sierra PM8001/8081/8088/8089 SAS/SATA based host adapters driver3 *4 * Copyright (c) 2008-2009 USI Co., Ltd.5 * All rights reserved.6 *7 * Redistribution and use in source and binary forms, with or without8 * modification, are permitted provided that the following conditions9 * are met:10 * 1. Redistributions of source code must retain the above copyright11 * notice, this list of conditions, and the following disclaimer,12 * without modification.13 * 2. Redistributions in binary form must reproduce at minimum a disclaimer14 * substantially similar to the "NO WARRANTY" disclaimer below15 * ("Disclaimer") and any redistribution must be conditioned upon16 * including a substantially similar Disclaimer requirement for further17 * binary redistribution.18 * 3. Neither the names of the above-listed copyright holders nor the names19 * of any contributors may be used to endorse or promote products derived20 * from this software without specific prior written permission.21 *22 * Alternatively, this software may be distributed under the terms of the23 * GNU General Public License ("GPL") version 2 as published by the Free24 * Software Foundation.25 *26 * NO WARRANTY27 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS28 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT29 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR30 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT31 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,35 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING36 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE37 * POSSIBILITY OF SUCH DAMAGES.38 *39 */40 41#include <linux/slab.h>42#include "pm8001_sas.h"43#include "pm80xx_tracepoints.h"44 45/**46 * pm8001_find_tag - from sas task to find out tag that belongs to this task47 * @task: the task sent to the LLDD48 * @tag: the found tag associated with the task49 */50static int pm8001_find_tag(struct sas_task *task, u32 *tag)51{52 if (task->lldd_task) {53 struct pm8001_ccb_info *ccb;54 ccb = task->lldd_task;55 *tag = ccb->ccb_tag;56 return 1;57 }58 return 0;59}60 61/**62 * pm8001_tag_free - free the no more needed tag63 * @pm8001_ha: our hba struct64 * @tag: the found tag associated with the task65 */66void pm8001_tag_free(struct pm8001_hba_info *pm8001_ha, u32 tag)67{68 void *bitmap = pm8001_ha->rsvd_tags;69 unsigned long flags;70 71 if (tag >= PM8001_RESERVE_SLOT)72 return;73 74 spin_lock_irqsave(&pm8001_ha->bitmap_lock, flags);75 __clear_bit(tag, bitmap);76 spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags);77}78 79/**80 * pm8001_tag_alloc - allocate a empty tag for task used.81 * @pm8001_ha: our hba struct82 * @tag_out: the found empty tag .83 */84int pm8001_tag_alloc(struct pm8001_hba_info *pm8001_ha, u32 *tag_out)85{86 void *bitmap = pm8001_ha->rsvd_tags;87 unsigned long flags;88 unsigned int tag;89 90 spin_lock_irqsave(&pm8001_ha->bitmap_lock, flags);91 tag = find_first_zero_bit(bitmap, PM8001_RESERVE_SLOT);92 if (tag >= PM8001_RESERVE_SLOT) {93 spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags);94 return -SAS_QUEUE_FULL;95 }96 __set_bit(tag, bitmap);97 spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags);98 99 /* reserved tags are in the lower region of the tagset */100 *tag_out = tag;101 return 0;102}103 104/**105 * pm8001_mem_alloc - allocate memory for pm8001.106 * @pdev: pci device.107 * @virt_addr: the allocated virtual address108 * @pphys_addr: DMA address for this device109 * @pphys_addr_hi: the physical address high byte address.110 * @pphys_addr_lo: the physical address low byte address.111 * @mem_size: memory size.112 * @align: requested byte alignment113 */114int pm8001_mem_alloc(struct pci_dev *pdev, void **virt_addr,115 dma_addr_t *pphys_addr, u32 *pphys_addr_hi,116 u32 *pphys_addr_lo, u32 mem_size, u32 align)117{118 caddr_t mem_virt_alloc;119 dma_addr_t mem_dma_handle;120 u64 phys_align;121 u64 align_offset = 0;122 if (align)123 align_offset = (dma_addr_t)align - 1;124 mem_virt_alloc = dma_alloc_coherent(&pdev->dev, mem_size + align,125 &mem_dma_handle, GFP_KERNEL);126 if (!mem_virt_alloc)127 return -ENOMEM;128 *pphys_addr = mem_dma_handle;129 phys_align = (*pphys_addr + align_offset) & ~align_offset;130 *virt_addr = (void *)mem_virt_alloc + phys_align - *pphys_addr;131 *pphys_addr_hi = upper_32_bits(phys_align);132 *pphys_addr_lo = lower_32_bits(phys_align);133 return 0;134}135 136/**137 * pm8001_find_ha_by_dev - from domain device which come from sas layer to138 * find out our hba struct.139 * @dev: the domain device which from sas layer.140 */141static142struct pm8001_hba_info *pm8001_find_ha_by_dev(struct domain_device *dev)143{144 struct sas_ha_struct *sha = dev->port->ha;145 struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;146 return pm8001_ha;147}148 149/**150 * pm8001_phy_control - this function should be registered to151 * sas_domain_function_template to provide libsas used, note: this is just152 * control the HBA phy rather than other expander phy if you want control153 * other phy, you should use SMP command.154 * @sas_phy: which phy in HBA phys.155 * @func: the operation.156 * @funcdata: always NULL.157 */158int pm8001_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func,159 void *funcdata)160{161 int rc = 0, phy_id = sas_phy->id;162 struct pm8001_hba_info *pm8001_ha = NULL;163 struct sas_phy_linkrates *rates;164 struct pm8001_phy *phy;165 DECLARE_COMPLETION_ONSTACK(completion);166 unsigned long flags;167 pm8001_ha = sas_phy->ha->lldd_ha;168 phy = &pm8001_ha->phy[phy_id];169 170 if (PM8001_CHIP_DISP->fatal_errors(pm8001_ha)) {171 /*172 * If the controller is in fatal error state,173 * we will not get a response from the controller174 */175 pm8001_dbg(pm8001_ha, FAIL,176 "Phy control failed due to fatal errors\n");177 return -EFAULT;178 }179 180 switch (func) {181 case PHY_FUNC_SET_LINK_RATE:182 rates = funcdata;183 if (rates->minimum_linkrate) {184 pm8001_ha->phy[phy_id].minimum_linkrate =185 rates->minimum_linkrate;186 }187 if (rates->maximum_linkrate) {188 pm8001_ha->phy[phy_id].maximum_linkrate =189 rates->maximum_linkrate;190 }191 if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) {192 pm8001_ha->phy[phy_id].enable_completion = &completion;193 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);194 wait_for_completion(&completion);195 }196 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,197 PHY_LINK_RESET);198 break;199 case PHY_FUNC_HARD_RESET:200 if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) {201 pm8001_ha->phy[phy_id].enable_completion = &completion;202 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);203 wait_for_completion(&completion);204 }205 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,206 PHY_HARD_RESET);207 break;208 case PHY_FUNC_LINK_RESET:209 if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) {210 pm8001_ha->phy[phy_id].enable_completion = &completion;211 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);212 wait_for_completion(&completion);213 }214 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,215 PHY_LINK_RESET);216 break;217 case PHY_FUNC_RELEASE_SPINUP_HOLD:218 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,219 PHY_LINK_RESET);220 break;221 case PHY_FUNC_DISABLE:222 if (pm8001_ha->chip_id != chip_8001) {223 if (pm8001_ha->phy[phy_id].phy_state ==224 PHY_STATE_LINK_UP_SPCV) {225 sas_phy_disconnected(&phy->sas_phy);226 sas_notify_phy_event(&phy->sas_phy,227 PHYE_LOSS_OF_SIGNAL, GFP_KERNEL);228 phy->phy_attached = 0;229 }230 } else {231 if (pm8001_ha->phy[phy_id].phy_state ==232 PHY_STATE_LINK_UP_SPC) {233 sas_phy_disconnected(&phy->sas_phy);234 sas_notify_phy_event(&phy->sas_phy,235 PHYE_LOSS_OF_SIGNAL, GFP_KERNEL);236 phy->phy_attached = 0;237 }238 }239 PM8001_CHIP_DISP->phy_stop_req(pm8001_ha, phy_id);240 break;241 case PHY_FUNC_GET_EVENTS:242 spin_lock_irqsave(&pm8001_ha->lock, flags);243 if (pm8001_ha->chip_id == chip_8001) {244 if (-1 == pm8001_bar4_shift(pm8001_ha,245 (phy_id < 4) ? 0x30000 : 0x40000)) {246 spin_unlock_irqrestore(&pm8001_ha->lock, flags);247 return -EINVAL;248 }249 }250 {251 struct sas_phy *phy = sas_phy->phy;252 u32 __iomem *qp = pm8001_ha->io_mem[2].memvirtaddr253 + 0x1034 + (0x4000 * (phy_id & 3));254 255 phy->invalid_dword_count = readl(qp);256 phy->running_disparity_error_count = readl(&qp[1]);257 phy->loss_of_dword_sync_count = readl(&qp[3]);258 phy->phy_reset_problem_count = readl(&qp[4]);259 }260 if (pm8001_ha->chip_id == chip_8001)261 pm8001_bar4_shift(pm8001_ha, 0);262 spin_unlock_irqrestore(&pm8001_ha->lock, flags);263 return 0;264 default:265 pm8001_dbg(pm8001_ha, DEVIO, "func 0x%x\n", func);266 rc = -EOPNOTSUPP;267 }268 msleep(300);269 return rc;270}271 272/**273 * pm8001_scan_start - we should enable all HBA phys by sending the phy_start274 * command to HBA.275 * @shost: the scsi host data.276 */277void pm8001_scan_start(struct Scsi_Host *shost)278{279 int i;280 struct pm8001_hba_info *pm8001_ha;281 struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);282 DECLARE_COMPLETION_ONSTACK(completion);283 pm8001_ha = sha->lldd_ha;284 /* SAS_RE_INITIALIZATION not available in SPCv/ve */285 if (pm8001_ha->chip_id == chip_8001)286 PM8001_CHIP_DISP->sas_re_init_req(pm8001_ha);287 for (i = 0; i < pm8001_ha->chip->n_phy; ++i) {288 pm8001_ha->phy[i].enable_completion = &completion;289 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, i);290 wait_for_completion(&completion);291 msleep(300);292 }293}294 295int pm8001_scan_finished(struct Scsi_Host *shost, unsigned long time)296{297 struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);298 299 /* give the phy enabling interrupt event time to come in (1s300 * is empirically about all it takes) */301 if (time < HZ)302 return 0;303 /* Wait for discovery to finish */304 sas_drain_work(ha);305 return 1;306}307 308/**309 * pm8001_task_prep_smp - the dispatcher function, prepare data for smp task310 * @pm8001_ha: our hba card information311 * @ccb: the ccb which attached to smp task312 */313static int pm8001_task_prep_smp(struct pm8001_hba_info *pm8001_ha,314 struct pm8001_ccb_info *ccb)315{316 return PM8001_CHIP_DISP->smp_req(pm8001_ha, ccb);317}318 319u32 pm8001_get_ncq_tag(struct sas_task *task, u32 *tag)320{321 struct ata_queued_cmd *qc = task->uldd_task;322 323 if (qc && ata_is_ncq(qc->tf.protocol)) {324 *tag = qc->tag;325 return 1;326 }327 328 return 0;329}330 331/**332 * pm8001_task_prep_ata - the dispatcher function, prepare data for sata task333 * @pm8001_ha: our hba card information334 * @ccb: the ccb which attached to sata task335 */336static int pm8001_task_prep_ata(struct pm8001_hba_info *pm8001_ha,337 struct pm8001_ccb_info *ccb)338{339 return PM8001_CHIP_DISP->sata_req(pm8001_ha, ccb);340}341 342/**343 * pm8001_task_prep_internal_abort - the dispatcher function, prepare data344 * for internal abort task345 * @pm8001_ha: our hba card information346 * @ccb: the ccb which attached to sata task347 */348static int pm8001_task_prep_internal_abort(struct pm8001_hba_info *pm8001_ha,349 struct pm8001_ccb_info *ccb)350{351 return PM8001_CHIP_DISP->task_abort(pm8001_ha, ccb);352}353 354/**355 * pm8001_task_prep_ssp_tm - the dispatcher function, prepare task management data356 * @pm8001_ha: our hba card information357 * @ccb: the ccb which attached to TM358 * @tmf: the task management IU359 */360static int pm8001_task_prep_ssp_tm(struct pm8001_hba_info *pm8001_ha,361 struct pm8001_ccb_info *ccb, struct sas_tmf_task *tmf)362{363 return PM8001_CHIP_DISP->ssp_tm_req(pm8001_ha, ccb, tmf);364}365 366/**367 * pm8001_task_prep_ssp - the dispatcher function, prepare ssp data for ssp task368 * @pm8001_ha: our hba card information369 * @ccb: the ccb which attached to ssp task370 */371static int pm8001_task_prep_ssp(struct pm8001_hba_info *pm8001_ha,372 struct pm8001_ccb_info *ccb)373{374 return PM8001_CHIP_DISP->ssp_io_req(pm8001_ha, ccb);375}376 377 /* Find the local port id that's attached to this device */378static int sas_find_local_port_id(struct domain_device *dev)379{380 struct domain_device *pdev = dev->parent;381 382 /* Directly attached device */383 if (!pdev)384 return dev->port->id;385 while (pdev) {386 struct domain_device *pdev_p = pdev->parent;387 if (!pdev_p)388 return pdev->port->id;389 pdev = pdev->parent;390 }391 return 0;392}393 394#define DEV_IS_GONE(pm8001_dev) \395 ((!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED)))396 397 398static int pm8001_deliver_command(struct pm8001_hba_info *pm8001_ha,399 struct pm8001_ccb_info *ccb)400{401 struct sas_task *task = ccb->task;402 enum sas_protocol task_proto = task->task_proto;403 struct sas_tmf_task *tmf = task->tmf;404 int is_tmf = !!tmf;405 406 switch (task_proto) {407 case SAS_PROTOCOL_SMP:408 return pm8001_task_prep_smp(pm8001_ha, ccb);409 case SAS_PROTOCOL_SSP:410 if (is_tmf)411 return pm8001_task_prep_ssp_tm(pm8001_ha, ccb, tmf);412 return pm8001_task_prep_ssp(pm8001_ha, ccb);413 case SAS_PROTOCOL_SATA:414 case SAS_PROTOCOL_STP:415 return pm8001_task_prep_ata(pm8001_ha, ccb);416 case SAS_PROTOCOL_INTERNAL_ABORT:417 return pm8001_task_prep_internal_abort(pm8001_ha, ccb);418 default:419 dev_err(pm8001_ha->dev, "unknown sas_task proto: 0x%x\n",420 task_proto);421 }422 423 return -EINVAL;424}425 426/**427 * pm8001_queue_command - register for upper layer used, all IO commands sent428 * to HBA are from this interface.429 * @task: the task to be execute.430 * @gfp_flags: gfp_flags431 */432int pm8001_queue_command(struct sas_task *task, gfp_t gfp_flags)433{434 struct task_status_struct *ts = &task->task_status;435 enum sas_protocol task_proto = task->task_proto;436 struct domain_device *dev = task->dev;437 struct pm8001_device *pm8001_dev = dev->lldd_dev;438 bool internal_abort = sas_is_internal_abort(task);439 struct pm8001_hba_info *pm8001_ha;440 struct pm8001_port *port = NULL;441 struct pm8001_ccb_info *ccb;442 unsigned long flags;443 u32 n_elem = 0;444 int rc = 0;445 446 if (!internal_abort && !dev->port) {447 ts->resp = SAS_TASK_UNDELIVERED;448 ts->stat = SAS_PHY_DOWN;449 if (dev->dev_type != SAS_SATA_DEV)450 task->task_done(task);451 return 0;452 }453 454 pm8001_ha = pm8001_find_ha_by_dev(dev);455 if (pm8001_ha->controller_fatal_error) {456 ts->resp = SAS_TASK_UNDELIVERED;457 task->task_done(task);458 return 0;459 }460 461 pm8001_dbg(pm8001_ha, IO, "pm8001_task_exec device\n");462 463 spin_lock_irqsave(&pm8001_ha->lock, flags);464 465 pm8001_dev = dev->lldd_dev;466 port = &pm8001_ha->port[sas_find_local_port_id(dev)];467 468 if (!internal_abort &&469 (DEV_IS_GONE(pm8001_dev) || !port->port_attached)) {470 ts->resp = SAS_TASK_UNDELIVERED;471 ts->stat = SAS_PHY_DOWN;472 if (sas_protocol_ata(task_proto)) {473 spin_unlock_irqrestore(&pm8001_ha->lock, flags);474 task->task_done(task);475 spin_lock_irqsave(&pm8001_ha->lock, flags);476 } else {477 task->task_done(task);478 }479 rc = -ENODEV;480 goto err_out;481 }482 483 ccb = pm8001_ccb_alloc(pm8001_ha, pm8001_dev, task);484 if (!ccb) {485 rc = -SAS_QUEUE_FULL;486 goto err_out;487 }488 489 if (!sas_protocol_ata(task_proto)) {490 if (task->num_scatter) {491 n_elem = dma_map_sg(pm8001_ha->dev, task->scatter,492 task->num_scatter, task->data_dir);493 if (!n_elem) {494 rc = -ENOMEM;495 goto err_out_ccb;496 }497 }498 } else {499 n_elem = task->num_scatter;500 }501 502 task->lldd_task = ccb;503 ccb->n_elem = n_elem;504 505 atomic_inc(&pm8001_dev->running_req);506 507 rc = pm8001_deliver_command(pm8001_ha, ccb);508 if (rc) {509 atomic_dec(&pm8001_dev->running_req);510 if (!sas_protocol_ata(task_proto) && n_elem)511 dma_unmap_sg(pm8001_ha->dev, task->scatter,512 task->num_scatter, task->data_dir);513err_out_ccb:514 pm8001_ccb_free(pm8001_ha, ccb);515 516err_out:517 pm8001_dbg(pm8001_ha, IO, "pm8001_task_exec failed[%d]!\n", rc);518 }519 520 spin_unlock_irqrestore(&pm8001_ha->lock, flags);521 522 return rc;523}524 525/**526 * pm8001_ccb_task_free - free the sg for ssp and smp command, free the ccb.527 * @pm8001_ha: our hba card information528 * @ccb: the ccb which attached to ssp task to free529 */530void pm8001_ccb_task_free(struct pm8001_hba_info *pm8001_ha,531 struct pm8001_ccb_info *ccb)532{533 struct sas_task *task = ccb->task;534 struct ata_queued_cmd *qc;535 struct pm8001_device *pm8001_dev;536 537 if (!task)538 return;539 540 if (!sas_protocol_ata(task->task_proto) && ccb->n_elem)541 dma_unmap_sg(pm8001_ha->dev, task->scatter,542 task->num_scatter, task->data_dir);543 544 switch (task->task_proto) {545 case SAS_PROTOCOL_SMP:546 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_resp, 1,547 DMA_FROM_DEVICE);548 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_req, 1,549 DMA_TO_DEVICE);550 break;551 552 case SAS_PROTOCOL_SATA:553 case SAS_PROTOCOL_STP:554 case SAS_PROTOCOL_SSP:555 default:556 /* do nothing */557 break;558 }559 560 if (sas_protocol_ata(task->task_proto)) {561 /* For SCSI/ATA commands uldd_task points to ata_queued_cmd */562 qc = task->uldd_task;563 pm8001_dev = ccb->device;564 trace_pm80xx_request_complete(pm8001_ha->id,565 pm8001_dev ? pm8001_dev->attached_phy : PM8001_MAX_PHYS,566 ccb->ccb_tag, 0 /* ctlr_opcode not known */,567 qc ? qc->tf.command : 0, // ata opcode568 pm8001_dev ? atomic_read(&pm8001_dev->running_req) : -1);569 }570 571 task->lldd_task = NULL;572 pm8001_ccb_free(pm8001_ha, ccb);573}574 575/**576 * pm8001_alloc_dev - find a empty pm8001_device577 * @pm8001_ha: our hba card information578 */579static struct pm8001_device *pm8001_alloc_dev(struct pm8001_hba_info *pm8001_ha)580{581 u32 dev;582 for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {583 if (pm8001_ha->devices[dev].dev_type == SAS_PHY_UNUSED) {584 pm8001_ha->devices[dev].id = dev;585 return &pm8001_ha->devices[dev];586 }587 }588 if (dev == PM8001_MAX_DEVICES) {589 pm8001_dbg(pm8001_ha, FAIL,590 "max support %d devices, ignore ..\n",591 PM8001_MAX_DEVICES);592 }593 return NULL;594}595/**596 * pm8001_find_dev - find a matching pm8001_device597 * @pm8001_ha: our hba card information598 * @device_id: device ID to match against599 */600struct pm8001_device *pm8001_find_dev(struct pm8001_hba_info *pm8001_ha,601 u32 device_id)602{603 u32 dev;604 for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {605 if (pm8001_ha->devices[dev].device_id == device_id)606 return &pm8001_ha->devices[dev];607 }608 if (dev == PM8001_MAX_DEVICES) {609 pm8001_dbg(pm8001_ha, FAIL, "NO MATCHING DEVICE FOUND !!!\n");610 }611 return NULL;612}613 614void pm8001_free_dev(struct pm8001_device *pm8001_dev)615{616 u32 id = pm8001_dev->id;617 memset(pm8001_dev, 0, sizeof(*pm8001_dev));618 pm8001_dev->id = id;619 pm8001_dev->dev_type = SAS_PHY_UNUSED;620 pm8001_dev->device_id = PM8001_MAX_DEVICES;621 pm8001_dev->sas_device = NULL;622}623 624/**625 * pm8001_dev_found_notify - libsas notify a device is found.626 * @dev: the device structure which sas layer used.627 *628 * when libsas find a sas domain device, it should tell the LLDD that629 * device is found, and then LLDD register this device to HBA firmware630 * by the command "OPC_INB_REG_DEV", after that the HBA will assign a631 * device ID(according to device's sas address) and returned it to LLDD. From632 * now on, we communicate with HBA FW with the device ID which HBA assigned633 * rather than sas address. it is the necessary step for our HBA but it is634 * the optional for other HBA driver.635 */636static int pm8001_dev_found_notify(struct domain_device *dev)637{638 unsigned long flags = 0;639 int res = 0;640 struct pm8001_hba_info *pm8001_ha = NULL;641 struct domain_device *parent_dev = dev->parent;642 struct pm8001_device *pm8001_device;643 DECLARE_COMPLETION_ONSTACK(completion);644 u32 flag = 0;645 pm8001_ha = pm8001_find_ha_by_dev(dev);646 spin_lock_irqsave(&pm8001_ha->lock, flags);647 648 pm8001_device = pm8001_alloc_dev(pm8001_ha);649 if (!pm8001_device) {650 res = -1;651 goto found_out;652 }653 pm8001_device->sas_device = dev;654 dev->lldd_dev = pm8001_device;655 pm8001_device->dev_type = dev->dev_type;656 pm8001_device->dcompletion = &completion;657 if (parent_dev && dev_is_expander(parent_dev->dev_type)) {658 int phy_id;659 660 phy_id = sas_find_attached_phy_id(&parent_dev->ex_dev, dev);661 if (phy_id < 0) {662 pm8001_dbg(pm8001_ha, FAIL,663 "Error: no attached dev:%016llx at ex:%016llx.\n",664 SAS_ADDR(dev->sas_addr),665 SAS_ADDR(parent_dev->sas_addr));666 res = phy_id;667 } else {668 pm8001_device->attached_phy = phy_id;669 }670 } else {671 if (dev->dev_type == SAS_SATA_DEV) {672 pm8001_device->attached_phy =673 dev->rphy->identify.phy_identifier;674 flag = 1; /* directly sata */675 }676 } /*register this device to HBA*/677 pm8001_dbg(pm8001_ha, DISC, "Found device\n");678 PM8001_CHIP_DISP->reg_dev_req(pm8001_ha, pm8001_device, flag);679 spin_unlock_irqrestore(&pm8001_ha->lock, flags);680 wait_for_completion(&completion);681 if (dev->dev_type == SAS_END_DEVICE)682 msleep(50);683 pm8001_ha->flags = PM8001F_RUN_TIME;684 return 0;685found_out:686 spin_unlock_irqrestore(&pm8001_ha->lock, flags);687 return res;688}689 690int pm8001_dev_found(struct domain_device *dev)691{692 return pm8001_dev_found_notify(dev);693}694 695#define PM8001_TASK_TIMEOUT 20696 697/**698 * pm8001_dev_gone_notify - see the comments for "pm8001_dev_found_notify"699 * @dev: the device structure which sas layer used.700 */701static void pm8001_dev_gone_notify(struct domain_device *dev)702{703 unsigned long flags = 0;704 struct pm8001_hba_info *pm8001_ha;705 struct pm8001_device *pm8001_dev = dev->lldd_dev;706 707 pm8001_ha = pm8001_find_ha_by_dev(dev);708 spin_lock_irqsave(&pm8001_ha->lock, flags);709 if (pm8001_dev) {710 u32 device_id = pm8001_dev->device_id;711 712 pm8001_dbg(pm8001_ha, DISC, "found dev[%d:%x] is gone.\n",713 pm8001_dev->device_id, pm8001_dev->dev_type);714 if (atomic_read(&pm8001_dev->running_req)) {715 spin_unlock_irqrestore(&pm8001_ha->lock, flags);716 sas_execute_internal_abort_dev(dev, 0, NULL);717 while (atomic_read(&pm8001_dev->running_req))718 msleep(20);719 spin_lock_irqsave(&pm8001_ha->lock, flags);720 }721 PM8001_CHIP_DISP->dereg_dev_req(pm8001_ha, device_id);722 pm8001_free_dev(pm8001_dev);723 } else {724 pm8001_dbg(pm8001_ha, DISC, "Found dev has gone.\n");725 }726 dev->lldd_dev = NULL;727 spin_unlock_irqrestore(&pm8001_ha->lock, flags);728}729 730void pm8001_dev_gone(struct domain_device *dev)731{732 pm8001_dev_gone_notify(dev);733}734 735/* retry commands by ha, by task and/or by device */736void pm8001_open_reject_retry(737 struct pm8001_hba_info *pm8001_ha,738 struct sas_task *task_to_close,739 struct pm8001_device *device_to_close)740{741 int i;742 unsigned long flags;743 744 if (pm8001_ha == NULL)745 return;746 747 spin_lock_irqsave(&pm8001_ha->lock, flags);748 749 for (i = 0; i < PM8001_MAX_CCB; i++) {750 struct sas_task *task;751 struct task_status_struct *ts;752 struct pm8001_device *pm8001_dev;753 unsigned long flags1;754 struct pm8001_ccb_info *ccb = &pm8001_ha->ccb_info[i];755 756 if (ccb->ccb_tag == PM8001_INVALID_TAG)757 continue;758 759 pm8001_dev = ccb->device;760 if (!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED))761 continue;762 if (!device_to_close) {763 uintptr_t d = (uintptr_t)pm8001_dev764 - (uintptr_t)&pm8001_ha->devices;765 if (((d % sizeof(*pm8001_dev)) != 0)766 || ((d / sizeof(*pm8001_dev)) >= PM8001_MAX_DEVICES))767 continue;768 } else if (pm8001_dev != device_to_close)769 continue;770 task = ccb->task;771 if (!task || !task->task_done)772 continue;773 if (task_to_close && (task != task_to_close))774 continue;775 ts = &task->task_status;776 ts->resp = SAS_TASK_COMPLETE;777 /* Force the midlayer to retry */778 ts->stat = SAS_OPEN_REJECT;779 ts->open_rej_reason = SAS_OREJ_RSVD_RETRY;780 if (pm8001_dev)781 atomic_dec(&pm8001_dev->running_req);782 spin_lock_irqsave(&task->task_state_lock, flags1);783 task->task_state_flags &= ~SAS_TASK_STATE_PENDING;784 task->task_state_flags |= SAS_TASK_STATE_DONE;785 if (unlikely((task->task_state_flags786 & SAS_TASK_STATE_ABORTED))) {787 spin_unlock_irqrestore(&task->task_state_lock,788 flags1);789 pm8001_ccb_task_free(pm8001_ha, ccb);790 } else {791 spin_unlock_irqrestore(&task->task_state_lock,792 flags1);793 pm8001_ccb_task_free(pm8001_ha, ccb);794 mb();/* in order to force CPU ordering */795 spin_unlock_irqrestore(&pm8001_ha->lock, flags);796 task->task_done(task);797 spin_lock_irqsave(&pm8001_ha->lock, flags);798 }799 }800 801 spin_unlock_irqrestore(&pm8001_ha->lock, flags);802}803 804/**805 * pm8001_I_T_nexus_reset() - reset the initiator/target connection806 * @dev: the device structure for the device to reset.807 *808 * Standard mandates link reset for ATA (type 0) and hard reset for809 * SSP (type 1), only for RECOVERY810 */811int pm8001_I_T_nexus_reset(struct domain_device *dev)812{813 int rc = TMF_RESP_FUNC_FAILED;814 struct pm8001_device *pm8001_dev;815 struct pm8001_hba_info *pm8001_ha;816 struct sas_phy *phy;817 818 if (!dev || !dev->lldd_dev)819 return -ENODEV;820 821 pm8001_dev = dev->lldd_dev;822 pm8001_ha = pm8001_find_ha_by_dev(dev);823 phy = sas_get_local_phy(dev);824 825 if (dev_is_sata(dev)) {826 if (scsi_is_sas_phy_local(phy)) {827 rc = 0;828 goto out;829 }830 rc = sas_phy_reset(phy, 1);831 if (rc) {832 pm8001_dbg(pm8001_ha, EH,833 "phy reset failed for device %x\n"834 "with rc %d\n", pm8001_dev->device_id, rc);835 rc = TMF_RESP_FUNC_FAILED;836 goto out;837 }838 msleep(2000);839 rc = sas_execute_internal_abort_dev(dev, 0, NULL);840 if (rc) {841 pm8001_dbg(pm8001_ha, EH, "task abort failed %x\n"842 "with rc %d\n", pm8001_dev->device_id, rc);843 rc = TMF_RESP_FUNC_FAILED;844 }845 } else {846 rc = sas_phy_reset(phy, 1);847 msleep(2000);848 }849 pm8001_dbg(pm8001_ha, EH, " for device[%x]:rc=%d\n",850 pm8001_dev->device_id, rc);851 out:852 sas_put_local_phy(phy);853 return rc;854}855 856/*857* This function handle the IT_NEXUS_XXX event or completion858* status code for SSP/SATA/SMP I/O request.859*/860int pm8001_I_T_nexus_event_handler(struct domain_device *dev)861{862 int rc = TMF_RESP_FUNC_FAILED;863 struct pm8001_device *pm8001_dev;864 struct pm8001_hba_info *pm8001_ha;865 struct sas_phy *phy;866 867 if (!dev || !dev->lldd_dev)868 return -1;869 870 pm8001_dev = dev->lldd_dev;871 pm8001_ha = pm8001_find_ha_by_dev(dev);872 873 pm8001_dbg(pm8001_ha, EH, "I_T_Nexus handler invoked !!\n");874 875 phy = sas_get_local_phy(dev);876 877 if (dev_is_sata(dev)) {878 DECLARE_COMPLETION_ONSTACK(completion_setstate);879 if (scsi_is_sas_phy_local(phy)) {880 rc = 0;881 goto out;882 }883 /* send internal ssp/sata/smp abort command to FW */884 sas_execute_internal_abort_dev(dev, 0, NULL);885 msleep(100);886 887 /* deregister the target device */888 pm8001_dev_gone_notify(dev);889 msleep(200);890 891 /*send phy reset to hard reset target */892 rc = sas_phy_reset(phy, 1);893 msleep(2000);894 pm8001_dev->setds_completion = &completion_setstate;895 896 wait_for_completion(&completion_setstate);897 } else {898 /* send internal ssp/sata/smp abort command to FW */899 sas_execute_internal_abort_dev(dev, 0, NULL);900 msleep(100);901 902 /* deregister the target device */903 pm8001_dev_gone_notify(dev);904 msleep(200);905 906 /*send phy reset to hard reset target */907 rc = sas_phy_reset(phy, 1);908 msleep(2000);909 }910 pm8001_dbg(pm8001_ha, EH, " for device[%x]:rc=%d\n",911 pm8001_dev->device_id, rc);912out:913 sas_put_local_phy(phy);914 915 return rc;916}917/* mandatory SAM-3, the task reset the specified LUN*/918int pm8001_lu_reset(struct domain_device *dev, u8 *lun)919{920 int rc = TMF_RESP_FUNC_FAILED;921 struct pm8001_device *pm8001_dev = dev->lldd_dev;922 struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);923 DECLARE_COMPLETION_ONSTACK(completion_setstate);924 925 if (PM8001_CHIP_DISP->fatal_errors(pm8001_ha)) {926 /*927 * If the controller is in fatal error state,928 * we will not get a response from the controller929 */930 pm8001_dbg(pm8001_ha, FAIL,931 "LUN reset failed due to fatal errors\n");932 return rc;933 }934 935 if (dev_is_sata(dev)) {936 struct sas_phy *phy = sas_get_local_phy(dev);937 sas_execute_internal_abort_dev(dev, 0, NULL);938 rc = sas_phy_reset(phy, 1);939 sas_put_local_phy(phy);940 pm8001_dev->setds_completion = &completion_setstate;941 rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,942 pm8001_dev, DS_OPERATIONAL);943 wait_for_completion(&completion_setstate);944 } else {945 rc = sas_lu_reset(dev, lun);946 }947 /* If failed, fall-through I_T_Nexus reset */948 pm8001_dbg(pm8001_ha, EH, "for device[%x]:rc=%d\n",949 pm8001_dev->device_id, rc);950 return rc;951}952 953/* optional SAM-3 */954int pm8001_query_task(struct sas_task *task)955{956 u32 tag = 0xdeadbeef;957 int rc = TMF_RESP_FUNC_FAILED;958 if (unlikely(!task || !task->lldd_task || !task->dev))959 return rc;960 961 if (task->task_proto & SAS_PROTOCOL_SSP) {962 struct scsi_cmnd *cmnd = task->uldd_task;963 struct domain_device *dev = task->dev;964 struct pm8001_hba_info *pm8001_ha =965 pm8001_find_ha_by_dev(dev);966 967 rc = pm8001_find_tag(task, &tag);968 if (rc == 0) {969 rc = TMF_RESP_FUNC_FAILED;970 return rc;971 }972 pm8001_dbg(pm8001_ha, EH, "Query:[%16ph]\n", cmnd->cmnd);973 974 rc = sas_query_task(task, tag);975 switch (rc) {976 /* The task is still in Lun, release it then */977 case TMF_RESP_FUNC_SUCC:978 pm8001_dbg(pm8001_ha, EH,979 "The task is still in Lun\n");980 break;981 /* The task is not in Lun or failed, reset the phy */982 case TMF_RESP_FUNC_FAILED:983 case TMF_RESP_FUNC_COMPLETE:984 pm8001_dbg(pm8001_ha, EH,985 "The task is not in Lun or failed, reset the phy\n");986 break;987 }988 }989 pr_err("pm80xx: rc= %d\n", rc);990 return rc;991}992 993/* mandatory SAM-3, still need free task/ccb info, abort the specified task */994int pm8001_abort_task(struct sas_task *task)995{996 struct pm8001_ccb_info *ccb = task->lldd_task;997 unsigned long flags;998 u32 tag;999 struct domain_device *dev ;1000 struct pm8001_hba_info *pm8001_ha;1001 struct pm8001_device *pm8001_dev;1002 int rc = TMF_RESP_FUNC_FAILED, ret;1003 u32 phy_id, port_id;1004 struct sas_task_slow slow_task;1005 1006 if (!task->lldd_task || !task->dev)1007 return TMF_RESP_FUNC_FAILED;1008 1009 dev = task->dev;1010 pm8001_dev = dev->lldd_dev;1011 pm8001_ha = pm8001_find_ha_by_dev(dev);1012 phy_id = pm8001_dev->attached_phy;1013 1014 if (PM8001_CHIP_DISP->fatal_errors(pm8001_ha)) {1015 // If the controller is seeing fatal errors1016 // abort task will not get a response from the controller1017 return TMF_RESP_FUNC_FAILED;1018 }1019 1020 ret = pm8001_find_tag(task, &tag);1021 if (ret == 0) {1022 pm8001_info(pm8001_ha, "no tag for task:%p\n", task);1023 return TMF_RESP_FUNC_FAILED;1024 }1025 spin_lock_irqsave(&task->task_state_lock, flags);1026 if (task->task_state_flags & SAS_TASK_STATE_DONE) {1027 spin_unlock_irqrestore(&task->task_state_lock, flags);1028 return TMF_RESP_FUNC_COMPLETE;1029 }1030 task->task_state_flags |= SAS_TASK_STATE_ABORTED;1031 if (task->slow_task == NULL) {1032 init_completion(&slow_task.completion);1033 task->slow_task = &slow_task;1034 }1035 spin_unlock_irqrestore(&task->task_state_lock, flags);1036 if (task->task_proto & SAS_PROTOCOL_SSP) {1037 rc = sas_abort_task(task, tag);1038 sas_execute_internal_abort_single(dev, tag, 0, NULL);1039 } else if (task->task_proto & SAS_PROTOCOL_SATA ||1040 task->task_proto & SAS_PROTOCOL_STP) {1041 if (pm8001_ha->chip_id == chip_8006) {1042 DECLARE_COMPLETION_ONSTACK(completion_reset);1043 DECLARE_COMPLETION_ONSTACK(completion);1044 struct pm8001_phy *phy = pm8001_ha->phy + phy_id;1045 port_id = phy->port->port_id;1046 1047 /* 1. Set Device state as Recovery */1048 pm8001_dev->setds_completion = &completion;1049 PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,1050 pm8001_dev, DS_IN_RECOVERY);1051 wait_for_completion(&completion);1052 1053 /* 2. Send Phy Control Hard Reset */1054 reinit_completion(&completion);1055 phy->port_reset_status = PORT_RESET_TMO;1056 phy->reset_success = false;1057 phy->enable_completion = &completion;1058 phy->reset_completion = &completion_reset;1059 ret = PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,1060 PHY_HARD_RESET);1061 if (ret) {1062 phy->enable_completion = NULL;1063 phy->reset_completion = NULL;1064 goto out;1065 }1066 1067 /* In the case of the reset timeout/fail we still1068 * abort the command at the firmware. The assumption1069 * here is that the drive is off doing something so1070 * that it's not processing requests, and we want to1071 * avoid getting a completion for this and either1072 * leaking the task in libsas or losing the race and1073 * getting a double free.1074 */1075 pm8001_dbg(pm8001_ha, MSG,1076 "Waiting for local phy ctl\n");1077 ret = wait_for_completion_timeout(&completion,1078 PM8001_TASK_TIMEOUT * HZ);1079 if (!ret || !phy->reset_success) {1080 phy->enable_completion = NULL;1081 phy->reset_completion = NULL;1082 } else {1083 /* 3. Wait for Port Reset complete or1084 * Port reset TMO1085 */1086 pm8001_dbg(pm8001_ha, MSG,1087 "Waiting for Port reset\n");1088 ret = wait_for_completion_timeout(1089 &completion_reset,1090 PM8001_TASK_TIMEOUT * HZ);1091 if (!ret)1092 phy->reset_completion = NULL;1093 WARN_ON(phy->port_reset_status ==1094 PORT_RESET_TMO);1095 if (phy->port_reset_status == PORT_RESET_TMO) {1096 pm8001_dev_gone_notify(dev);1097 PM8001_CHIP_DISP->hw_event_ack_req(1098 pm8001_ha, 0,1099 0x07, /*HW_EVENT_PHY_DOWN ack*/1100 port_id, phy_id, 0, 0);1101 goto out;1102 }1103 }1104 1105 /*1106 * 4. SATA Abort ALL1107 * we wait for the task to be aborted so that the task1108 * is removed from the ccb. on success the caller is1109 * going to free the task.1110 */1111 ret = sas_execute_internal_abort_dev(dev, 0, NULL);1112 if (ret)1113 goto out;1114 ret = wait_for_completion_timeout(1115 &task->slow_task->completion,1116 PM8001_TASK_TIMEOUT * HZ);1117 if (!ret)1118 goto out;1119 1120 /* 5. Set Device State as Operational */1121 reinit_completion(&completion);1122 pm8001_dev->setds_completion = &completion;1123 PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,1124 pm8001_dev, DS_OPERATIONAL);1125 wait_for_completion(&completion);1126 } else {1127 /*1128 * Ensure that if we see a completion for the ccb1129 * associated with the task which we are trying to1130 * abort then we should not touch the sas_task as it1131 * may race with libsas freeing it when return here.1132 */1133 ccb->task = NULL;1134 ret = sas_execute_internal_abort_single(dev, tag, 0, NULL);1135 }1136 rc = TMF_RESP_FUNC_COMPLETE;1137 } else if (task->task_proto & SAS_PROTOCOL_SMP) {1138 /* SMP */1139 rc = sas_execute_internal_abort_single(dev, tag, 0, NULL);1140 1141 }1142out:1143 spin_lock_irqsave(&task->task_state_lock, flags);1144 if (task->slow_task == &slow_task)1145 task->slow_task = NULL;1146 spin_unlock_irqrestore(&task->task_state_lock, flags);1147 if (rc != TMF_RESP_FUNC_COMPLETE)1148 pm8001_info(pm8001_ha, "rc= %d\n", rc);1149 return rc;1150}1151 1152int pm8001_clear_task_set(struct domain_device *dev, u8 *lun)1153{1154 struct pm8001_device *pm8001_dev = dev->lldd_dev;1155 struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);1156 1157 pm8001_dbg(pm8001_ha, EH, "I_T_L_Q clear task set[%x]\n",1158 pm8001_dev->device_id);1159 return sas_clear_task_set(dev, lun);1160}1161 1162void pm8001_port_formed(struct asd_sas_phy *sas_phy)1163{1164 struct sas_ha_struct *sas_ha = sas_phy->ha;1165 struct pm8001_hba_info *pm8001_ha = sas_ha->lldd_ha;1166 struct pm8001_phy *phy = sas_phy->lldd_phy;1167 struct asd_sas_port *sas_port = sas_phy->port;1168 struct pm8001_port *port = phy->port;1169 1170 if (!sas_port) {1171 pm8001_dbg(pm8001_ha, FAIL, "Received null port\n");1172 return;1173 }1174 sas_port->lldd_port = port;1175}1176 1177void pm8001_setds_completion(struct domain_device *dev)1178{1179 struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);1180 struct pm8001_device *pm8001_dev = dev->lldd_dev;1181 DECLARE_COMPLETION_ONSTACK(completion_setstate);1182 1183 if (pm8001_ha->chip_id != chip_8001) {1184 pm8001_dev->setds_completion = &completion_setstate;1185 PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,1186 pm8001_dev, DS_OPERATIONAL);1187 wait_for_completion(&completion_setstate);1188 }1189}1190 1191void pm8001_tmf_aborted(struct sas_task *task)1192{1193 struct pm8001_ccb_info *ccb = task->lldd_task;1194 1195 if (ccb)1196 ccb->task = NULL;1197}1198