linux/drivers/scsi/aic94xx/aic94xx_scb.c
<<
>>
Prefs
   1/*
   2 * Aic94xx SAS/SATA driver SCB management.
   3 *
   4 * Copyright (C) 2005 Adaptec, Inc.  All rights reserved.
   5 * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
   6 *
   7 * This file is licensed under GPLv2.
   8 *
   9 * This file is part of the aic94xx driver.
  10 *
  11 * The aic94xx driver is free software; you can redistribute it and/or
  12 * modify it under the terms of the GNU General Public License as
  13 * published by the Free Software Foundation; version 2 of the
  14 * License.
  15 *
  16 * The aic94xx driver is distributed in the hope that it will be useful,
  17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19 * General Public License for more details.
  20 *
  21 * You should have received a copy of the GNU General Public License
  22 * along with the aic94xx driver; if not, write to the Free Software
  23 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  24 *
  25 */
  26
  27#include <linux/gfp.h>
  28#include <scsi/scsi_host.h>
  29
  30#include "aic94xx.h"
  31#include "aic94xx_reg.h"
  32#include "aic94xx_hwi.h"
  33#include "aic94xx_seq.h"
  34
  35#include "aic94xx_dump.h"
  36
  37/* ---------- EMPTY SCB ---------- */
  38
  39#define DL_PHY_MASK      7
  40#define BYTES_DMAED      0
  41#define PRIMITIVE_RECVD  0x08
  42#define PHY_EVENT        0x10
  43#define LINK_RESET_ERROR 0x18
  44#define TIMER_EVENT      0x20
  45#define REQ_TASK_ABORT   0xF0
  46#define REQ_DEVICE_RESET 0xF1
  47#define SIGNAL_NCQ_ERROR 0xF2
  48#define CLEAR_NCQ_ERROR  0xF3
  49
  50#define PHY_EVENTS_STATUS (CURRENT_LOSS_OF_SIGNAL | CURRENT_OOB_DONE   \
  51                           | CURRENT_SPINUP_HOLD | CURRENT_GTO_TIMEOUT \
  52                           | CURRENT_OOB_ERROR)
  53
  54static void get_lrate_mode(struct asd_phy *phy, u8 oob_mode)
  55{
  56        struct sas_phy *sas_phy = phy->sas_phy.phy;
  57
  58        switch (oob_mode & 7) {
  59        case PHY_SPEED_60:
  60                /* FIXME: sas transport class doesn't have this */
  61                phy->sas_phy.linkrate = SAS_LINK_RATE_6_0_GBPS;
  62                phy->sas_phy.phy->negotiated_linkrate = SAS_LINK_RATE_6_0_GBPS;
  63                break;
  64        case PHY_SPEED_30:
  65                phy->sas_phy.linkrate = SAS_LINK_RATE_3_0_GBPS;
  66                phy->sas_phy.phy->negotiated_linkrate = SAS_LINK_RATE_3_0_GBPS;
  67                break;
  68        case PHY_SPEED_15:
  69                phy->sas_phy.linkrate = SAS_LINK_RATE_1_5_GBPS;
  70                phy->sas_phy.phy->negotiated_linkrate = SAS_LINK_RATE_1_5_GBPS;
  71                break;
  72        }
  73        sas_phy->negotiated_linkrate = phy->sas_phy.linkrate;
  74        sas_phy->maximum_linkrate_hw = SAS_LINK_RATE_3_0_GBPS;
  75        sas_phy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
  76        sas_phy->maximum_linkrate = phy->phy_desc->max_sas_lrate;
  77        sas_phy->minimum_linkrate = phy->phy_desc->min_sas_lrate;
  78
  79        if (oob_mode & SAS_MODE)
  80                phy->sas_phy.oob_mode = SAS_OOB_MODE;
  81        else if (oob_mode & SATA_MODE)
  82                phy->sas_phy.oob_mode = SATA_OOB_MODE;
  83}
  84
  85static void asd_phy_event_tasklet(struct asd_ascb *ascb,
  86                                         struct done_list_struct *dl)
  87{
  88        struct asd_ha_struct *asd_ha = ascb->ha;
  89        struct sas_ha_struct *sas_ha = &asd_ha->sas_ha;
  90        int phy_id = dl->status_block[0] & DL_PHY_MASK;
  91        struct asd_phy *phy = &asd_ha->phys[phy_id];
  92
  93        u8 oob_status = dl->status_block[1] & PHY_EVENTS_STATUS;
  94        u8 oob_mode   = dl->status_block[2];
  95
  96        switch (oob_status) {
  97        case CURRENT_LOSS_OF_SIGNAL:
  98                /* directly attached device was removed */
  99                ASD_DPRINTK("phy%d: device unplugged\n", phy_id);
 100                asd_turn_led(asd_ha, phy_id, 0);
 101                sas_phy_disconnected(&phy->sas_phy);
 102                sas_ha->notify_phy_event(&phy->sas_phy, PHYE_LOSS_OF_SIGNAL);
 103                break;
 104        case CURRENT_OOB_DONE:
 105                /* hot plugged device */
 106                asd_turn_led(asd_ha, phy_id, 1);
 107                get_lrate_mode(phy, oob_mode);
 108                ASD_DPRINTK("phy%d device plugged: lrate:0x%x, proto:0x%x\n",
 109                            phy_id, phy->sas_phy.linkrate, phy->sas_phy.iproto);
 110                sas_ha->notify_phy_event(&phy->sas_phy, PHYE_OOB_DONE);
 111                break;
 112        case CURRENT_SPINUP_HOLD:
 113                /* hot plug SATA, no COMWAKE sent */
 114                asd_turn_led(asd_ha, phy_id, 1);
 115                sas_ha->notify_phy_event(&phy->sas_phy, PHYE_SPINUP_HOLD);
 116                break;
 117        case CURRENT_GTO_TIMEOUT:
 118        case CURRENT_OOB_ERROR:
 119                ASD_DPRINTK("phy%d error while OOB: oob status:0x%x\n", phy_id,
 120                            dl->status_block[1]);
 121                asd_turn_led(asd_ha, phy_id, 0);
 122                sas_phy_disconnected(&phy->sas_phy);
 123                sas_ha->notify_phy_event(&phy->sas_phy, PHYE_OOB_ERROR);
 124                break;
 125        }
 126}
 127
 128/* If phys are enabled sparsely, this will do the right thing. */
 129static unsigned ord_phy(struct asd_ha_struct *asd_ha, struct asd_phy *phy)
 130{
 131        u8 enabled_mask = asd_ha->hw_prof.enabled_phys;
 132        int i, k = 0;
 133
 134        for_each_phy(enabled_mask, enabled_mask, i) {
 135                if (&asd_ha->phys[i] == phy)
 136                        return k;
 137                k++;
 138        }
 139        return 0;
 140}
 141
 142/**
 143 * asd_get_attached_sas_addr -- extract/generate attached SAS address
 144 * phy: pointer to asd_phy
 145 * sas_addr: pointer to buffer where the SAS address is to be written
 146 *
 147 * This function extracts the SAS address from an IDENTIFY frame
 148 * received.  If OOB is SATA, then a SAS address is generated from the
 149 * HA tables.
 150 *
 151 * LOCKING: the frame_rcvd_lock needs to be held since this parses the frame
 152 * buffer.
 153 */
 154static void asd_get_attached_sas_addr(struct asd_phy *phy, u8 *sas_addr)
 155{
 156        if (phy->sas_phy.frame_rcvd[0] == 0x34
 157            && phy->sas_phy.oob_mode == SATA_OOB_MODE) {
 158                struct asd_ha_struct *asd_ha = phy->sas_phy.ha->lldd_ha;
 159                /* FIS device-to-host */
 160                u64 addr = be64_to_cpu(*(__be64 *)phy->phy_desc->sas_addr);
 161
 162                addr += asd_ha->hw_prof.sata_name_base + ord_phy(asd_ha, phy);
 163                *(__be64 *)sas_addr = cpu_to_be64(addr);
 164        } else {
 165                struct sas_identify_frame *idframe =
 166                        (void *) phy->sas_phy.frame_rcvd;
 167                memcpy(sas_addr, idframe->sas_addr, SAS_ADDR_SIZE);
 168        }
 169}
 170
 171static void asd_form_port(struct asd_ha_struct *asd_ha, struct asd_phy *phy)
 172{
 173        int i;
 174        struct asd_port *free_port = NULL;
 175        struct asd_port *port;
 176        struct asd_sas_phy *sas_phy = &phy->sas_phy;
 177        unsigned long flags;
 178
 179        spin_lock_irqsave(&asd_ha->asd_ports_lock, flags);
 180        if (!phy->asd_port) {
 181                for (i = 0; i < ASD_MAX_PHYS; i++) {
 182                        port = &asd_ha->asd_ports[i];
 183
 184                        /* Check for wide port */
 185                        if (port->num_phys > 0 &&
 186                            memcmp(port->sas_addr, sas_phy->sas_addr,
 187                                   SAS_ADDR_SIZE) == 0 &&
 188                            memcmp(port->attached_sas_addr,
 189                                   sas_phy->attached_sas_addr,
 190                                   SAS_ADDR_SIZE) == 0) {
 191                                break;
 192                        }
 193
 194                        /* Find a free port */
 195                        if (port->num_phys == 0 && free_port == NULL) {
 196                                free_port = port;
 197                        }
 198                }
 199
 200                /* Use a free port if this doesn't form a wide port */
 201                if (i >= ASD_MAX_PHYS) {
 202                        port = free_port;
 203                        BUG_ON(!port);
 204                        memcpy(port->sas_addr, sas_phy->sas_addr,
 205                               SAS_ADDR_SIZE);
 206                        memcpy(port->attached_sas_addr,
 207                               sas_phy->attached_sas_addr,
 208                               SAS_ADDR_SIZE);
 209                }
 210                port->num_phys++;
 211                port->phy_mask |= (1U << sas_phy->id);
 212                phy->asd_port = port;
 213        }
 214        ASD_DPRINTK("%s: updating phy_mask 0x%x for phy%d\n",
 215                    __func__, phy->asd_port->phy_mask, sas_phy->id);
 216        asd_update_port_links(asd_ha, phy);
 217        spin_unlock_irqrestore(&asd_ha->asd_ports_lock, flags);
 218}
 219
 220static void asd_deform_port(struct asd_ha_struct *asd_ha, struct asd_phy *phy)
 221{
 222        struct asd_port *port = phy->asd_port;
 223        struct asd_sas_phy *sas_phy = &phy->sas_phy;
 224        unsigned long flags;
 225
 226        spin_lock_irqsave(&asd_ha->asd_ports_lock, flags);
 227        if (port) {
 228                port->num_phys--;
 229                port->phy_mask &= ~(1U << sas_phy->id);
 230                phy->asd_port = NULL;
 231        }
 232        spin_unlock_irqrestore(&asd_ha->asd_ports_lock, flags);
 233}
 234
 235static void asd_bytes_dmaed_tasklet(struct asd_ascb *ascb,
 236                                    struct done_list_struct *dl,
 237                                    int edb_id, int phy_id)
 238{
 239        unsigned long flags;
 240        int edb_el = edb_id + ascb->edb_index;
 241        struct asd_dma_tok *edb = ascb->ha->seq.edb_arr[edb_el];
 242        struct asd_phy *phy = &ascb->ha->phys[phy_id];
 243        struct sas_ha_struct *sas_ha = phy->sas_phy.ha;
 244        u16 size = ((dl->status_block[3] & 7) << 8) | dl->status_block[2];
 245
 246        size = min(size, (u16) sizeof(phy->frame_rcvd));
 247
 248        spin_lock_irqsave(&phy->sas_phy.frame_rcvd_lock, flags);
 249        memcpy(phy->sas_phy.frame_rcvd, edb->vaddr, size);
 250        phy->sas_phy.frame_rcvd_size = size;
 251        asd_get_attached_sas_addr(phy, phy->sas_phy.attached_sas_addr);
 252        spin_unlock_irqrestore(&phy->sas_phy.frame_rcvd_lock, flags);
 253        asd_dump_frame_rcvd(phy, dl);
 254        asd_form_port(ascb->ha, phy);
 255        sas_ha->notify_port_event(&phy->sas_phy, PORTE_BYTES_DMAED);
 256}
 257
 258static void asd_link_reset_err_tasklet(struct asd_ascb *ascb,
 259                                       struct done_list_struct *dl,
 260                                       int phy_id)
 261{
 262        struct asd_ha_struct *asd_ha = ascb->ha;
 263        struct sas_ha_struct *sas_ha = &asd_ha->sas_ha;
 264        struct asd_sas_phy *sas_phy = sas_ha->sas_phy[phy_id];
 265        struct asd_phy *phy = &asd_ha->phys[phy_id];
 266        u8 lr_error = dl->status_block[1];
 267        u8 retries_left = dl->status_block[2];
 268
 269        switch (lr_error) {
 270        case 0:
 271                ASD_DPRINTK("phy%d: Receive ID timer expired\n", phy_id);
 272                break;
 273        case 1:
 274                ASD_DPRINTK("phy%d: Loss of signal\n", phy_id);
 275                break;
 276        case 2:
 277                ASD_DPRINTK("phy%d: Loss of dword sync\n", phy_id);
 278                break;
 279        case 3:
 280                ASD_DPRINTK("phy%d: Receive FIS timeout\n", phy_id);
 281                break;
 282        default:
 283                ASD_DPRINTK("phy%d: unknown link reset error code: 0x%x\n",
 284                            phy_id, lr_error);
 285                break;
 286        }
 287
 288        asd_turn_led(asd_ha, phy_id, 0);
 289        sas_phy_disconnected(sas_phy);
 290        asd_deform_port(asd_ha, phy);
 291        sas_ha->notify_port_event(sas_phy, PORTE_LINK_RESET_ERR);
 292
 293        if (retries_left == 0) {
 294                int num = 1;
 295                struct asd_ascb *cp = asd_ascb_alloc_list(ascb->ha, &num,
 296                                                          GFP_ATOMIC);
 297                if (!cp) {
 298                        asd_printk("%s: out of memory\n", __func__);
 299                        goto out;
 300                }
 301                ASD_DPRINTK("phy%d: retries:0 performing link reset seq\n",
 302                            phy_id);
 303                asd_build_control_phy(cp, phy_id, ENABLE_PHY);
 304                if (asd_post_ascb_list(ascb->ha, cp, 1) != 0)
 305                        asd_ascb_free(cp);
 306        }
 307out:
 308        ;
 309}
 310
 311static void asd_primitive_rcvd_tasklet(struct asd_ascb *ascb,
 312                                       struct done_list_struct *dl,
 313                                       int phy_id)
 314{
 315        unsigned long flags;
 316        struct sas_ha_struct *sas_ha = &ascb->ha->sas_ha;
 317        struct asd_sas_phy *sas_phy = sas_ha->sas_phy[phy_id];
 318        struct asd_ha_struct *asd_ha = ascb->ha;
 319        struct asd_phy *phy = &asd_ha->phys[phy_id];
 320        u8  reg  = dl->status_block[1];
 321        u32 cont = dl->status_block[2] << ((reg & 3)*8);
 322
 323        reg &= ~3;
 324        switch (reg) {
 325        case LmPRMSTAT0BYTE0:
 326                switch (cont) {
 327                case LmBROADCH:
 328                case LmBROADRVCH0:
 329                case LmBROADRVCH1:
 330                case LmBROADSES:
 331                        ASD_DPRINTK("phy%d: BROADCAST change received:%d\n",
 332                                    phy_id, cont);
 333                        spin_lock_irqsave(&sas_phy->sas_prim_lock, flags);
 334                        sas_phy->sas_prim = ffs(cont);
 335                        spin_unlock_irqrestore(&sas_phy->sas_prim_lock, flags);
 336                        sas_ha->notify_port_event(sas_phy,PORTE_BROADCAST_RCVD);
 337                        break;
 338
 339                case LmUNKNOWNP:
 340                        ASD_DPRINTK("phy%d: unknown BREAK\n", phy_id);
 341                        break;
 342
 343                default:
 344                        ASD_DPRINTK("phy%d: primitive reg:0x%x, cont:0x%04x\n",
 345                                    phy_id, reg, cont);
 346                        break;
 347                }
 348                break;
 349        case LmPRMSTAT1BYTE0:
 350                switch (cont) {
 351                case LmHARDRST:
 352                        ASD_DPRINTK("phy%d: HARD_RESET primitive rcvd\n",
 353                                    phy_id);
 354                        /* The sequencer disables all phys on that port.
 355                         * We have to re-enable the phys ourselves. */
 356                        asd_deform_port(asd_ha, phy);
 357                        sas_ha->notify_port_event(sas_phy, PORTE_HARD_RESET);
 358                        break;
 359
 360                default:
 361                        ASD_DPRINTK("phy%d: primitive reg:0x%x, cont:0x%04x\n",
 362                                    phy_id, reg, cont);
 363                        break;
 364                }
 365                break;
 366        default:
 367                ASD_DPRINTK("unknown primitive register:0x%x\n",
 368                            dl->status_block[1]);
 369                break;
 370        }
 371}
 372
 373/**
 374 * asd_invalidate_edb -- invalidate an EDB and if necessary post the ESCB
 375 * @ascb: pointer to Empty SCB
 376 * @edb_id: index [0,6] to the empty data buffer which is to be invalidated
 377 *
 378 * After an EDB has been invalidated, if all EDBs in this ESCB have been
 379 * invalidated, the ESCB is posted back to the sequencer.
 380 * Context is tasklet/IRQ.
 381 */
 382void asd_invalidate_edb(struct asd_ascb *ascb, int edb_id)
 383{
 384        struct asd_seq_data *seq = &ascb->ha->seq;
 385        struct empty_scb *escb = &ascb->scb->escb;
 386        struct sg_el     *eb   = &escb->eb[edb_id];
 387        struct asd_dma_tok *edb = seq->edb_arr[ascb->edb_index + edb_id];
 388
 389        memset(edb->vaddr, 0, ASD_EDB_SIZE);
 390        eb->flags |= ELEMENT_NOT_VALID;
 391        escb->num_valid--;
 392
 393        if (escb->num_valid == 0) {
 394                int i;
 395                /* ASD_DPRINTK("reposting escb: vaddr: 0x%p, "
 396                            "dma_handle: 0x%08llx, next: 0x%08llx, "
 397                            "index:%d, opcode:0x%02x\n",
 398                            ascb->dma_scb.vaddr,
 399                            (u64)ascb->dma_scb.dma_handle,
 400                            le64_to_cpu(ascb->scb->header.next_scb),
 401                            le16_to_cpu(ascb->scb->header.index),
 402                            ascb->scb->header.opcode);
 403                */
 404                escb->num_valid = ASD_EDBS_PER_SCB;
 405                for (i = 0; i < ASD_EDBS_PER_SCB; i++)
 406                        escb->eb[i].flags = 0;
 407                if (!list_empty(&ascb->list))
 408                        list_del_init(&ascb->list);
 409                i = asd_post_escb_list(ascb->ha, ascb, 1);
 410                if (i)
 411                        asd_printk("couldn't post escb, err:%d\n", i);
 412        }
 413}
 414
 415static void escb_tasklet_complete(struct asd_ascb *ascb,
 416                                  struct done_list_struct *dl)
 417{
 418        struct asd_ha_struct *asd_ha = ascb->ha;
 419        struct sas_ha_struct *sas_ha = &asd_ha->sas_ha;
 420        int edb = (dl->opcode & DL_PHY_MASK) - 1; /* [0xc1,0xc7] -> [0,6] */
 421        u8  sb_opcode = dl->status_block[0];
 422        int phy_id = sb_opcode & DL_PHY_MASK;
 423        struct asd_sas_phy *sas_phy = sas_ha->sas_phy[phy_id];
 424        struct asd_phy *phy = &asd_ha->phys[phy_id];
 425
 426        if (edb > 6 || edb < 0) {
 427                ASD_DPRINTK("edb is 0x%x! dl->opcode is 0x%x\n",
 428                            edb, dl->opcode);
 429                ASD_DPRINTK("sb_opcode : 0x%x, phy_id: 0x%x\n",
 430                            sb_opcode, phy_id);
 431                ASD_DPRINTK("escb: vaddr: 0x%p, "
 432                            "dma_handle: 0x%llx, next: 0x%llx, "
 433                            "index:%d, opcode:0x%02x\n",
 434                            ascb->dma_scb.vaddr,
 435                            (unsigned long long)ascb->dma_scb.dma_handle,
 436                            (unsigned long long)
 437                            le64_to_cpu(ascb->scb->header.next_scb),
 438                            le16_to_cpu(ascb->scb->header.index),
 439                            ascb->scb->header.opcode);
 440        }
 441
 442        /* Catch these before we mask off the sb_opcode bits */
 443        switch (sb_opcode) {
 444        case REQ_TASK_ABORT: {
 445                struct asd_ascb *a, *b;
 446                u16 tc_abort;
 447                struct domain_device *failed_dev = NULL;
 448
 449                ASD_DPRINTK("%s: REQ_TASK_ABORT, reason=0x%X\n",
 450                            __func__, dl->status_block[3]);
 451
 452                /*
 453                 * Find the task that caused the abort and abort it first.
 454                 * The sequencer won't put anything on the done list until
 455                 * that happens.
 456                 */
 457                tc_abort = *((u16*)(&dl->status_block[1]));
 458                tc_abort = le16_to_cpu(tc_abort);
 459
 460                list_for_each_entry_safe(a, b, &asd_ha->seq.pend_q, list) {
 461                        struct sas_task *task = a->uldd_task;
 462
 463                        if (a->tc_index != tc_abort)
 464                                continue;
 465
 466                        if (task) {
 467                                failed_dev = task->dev;
 468                                sas_task_abort(task);
 469                        } else {
 470                                ASD_DPRINTK("R_T_A for non TASK scb 0x%x\n",
 471                                            a->scb->header.opcode);
 472                        }
 473                        break;
 474                }
 475
 476                if (!failed_dev) {
 477                        ASD_DPRINTK("%s: Can't find task (tc=%d) to abort!\n",
 478                                    __func__, tc_abort);
 479                        goto out;
 480                }
 481
 482                /*
 483                 * Now abort everything else for that device (hba?) so
 484                 * that the EH will wake up and do something.
 485                 */
 486                list_for_each_entry_safe(a, b, &asd_ha->seq.pend_q, list) {
 487                        struct sas_task *task = a->uldd_task;
 488
 489                        if (task &&
 490                            task->dev == failed_dev &&
 491                            a->tc_index != tc_abort)
 492                                sas_task_abort(task);
 493                }
 494
 495                goto out;
 496        }
 497        case REQ_DEVICE_RESET: {
 498                struct asd_ascb *a;
 499                u16 conn_handle;
 500                unsigned long flags;
 501                struct sas_task *last_dev_task = NULL;
 502
 503                conn_handle = *((u16*)(&dl->status_block[1]));
 504                conn_handle = le16_to_cpu(conn_handle);
 505
 506                ASD_DPRINTK("%s: REQ_DEVICE_RESET, reason=0x%X\n", __func__,
 507                            dl->status_block[3]);
 508
 509                /* Find the last pending task for the device... */
 510                list_for_each_entry(a, &asd_ha->seq.pend_q, list) {
 511                        u16 x;
 512                        struct domain_device *dev;
 513                        struct sas_task *task = a->uldd_task;
 514
 515                        if (!task)
 516                                continue;
 517                        dev = task->dev;
 518
 519                        x = (unsigned long)dev->lldd_dev;
 520                        if (x == conn_handle)
 521                                last_dev_task = task;
 522                }
 523
 524                if (!last_dev_task) {
 525                        ASD_DPRINTK("%s: Device reset for idle device %d?\n",
 526                                    __func__, conn_handle);
 527                        goto out;
 528                }
 529
 530                /* ...and set the reset flag */
 531                spin_lock_irqsave(&last_dev_task->task_state_lock, flags);
 532                last_dev_task->task_state_flags |= SAS_TASK_NEED_DEV_RESET;
 533                spin_unlock_irqrestore(&last_dev_task->task_state_lock, flags);
 534
 535                /* Kill all pending tasks for the device */
 536                list_for_each_entry(a, &asd_ha->seq.pend_q, list) {
 537                        u16 x;
 538                        struct domain_device *dev;
 539                        struct sas_task *task = a->uldd_task;
 540
 541                        if (!task)
 542                                continue;
 543                        dev = task->dev;
 544
 545                        x = (unsigned long)dev->lldd_dev;
 546                        if (x == conn_handle)
 547                                sas_task_abort(task);
 548                }
 549
 550                goto out;
 551        }
 552        case SIGNAL_NCQ_ERROR:
 553                ASD_DPRINTK("%s: SIGNAL_NCQ_ERROR\n", __func__);
 554                goto out;
 555        case CLEAR_NCQ_ERROR:
 556                ASD_DPRINTK("%s: CLEAR_NCQ_ERROR\n", __func__);
 557                goto out;
 558        }
 559
 560        sb_opcode &= ~DL_PHY_MASK;
 561
 562        switch (sb_opcode) {
 563        case BYTES_DMAED:
 564                ASD_DPRINTK("%s: phy%d: BYTES_DMAED\n", __func__, phy_id);
 565                asd_bytes_dmaed_tasklet(ascb, dl, edb, phy_id);
 566                break;
 567        case PRIMITIVE_RECVD:
 568                ASD_DPRINTK("%s: phy%d: PRIMITIVE_RECVD\n", __func__,
 569                            phy_id);
 570                asd_primitive_rcvd_tasklet(ascb, dl, phy_id);
 571                break;
 572        case PHY_EVENT:
 573                ASD_DPRINTK("%s: phy%d: PHY_EVENT\n", __func__, phy_id);
 574                asd_phy_event_tasklet(ascb, dl);
 575                break;
 576        case LINK_RESET_ERROR:
 577                ASD_DPRINTK("%s: phy%d: LINK_RESET_ERROR\n", __func__,
 578                            phy_id);
 579                asd_link_reset_err_tasklet(ascb, dl, phy_id);
 580                break;
 581        case TIMER_EVENT:
 582                ASD_DPRINTK("%s: phy%d: TIMER_EVENT, lost dw sync\n",
 583                            __func__, phy_id);
 584                asd_turn_led(asd_ha, phy_id, 0);
 585                /* the device is gone */
 586                sas_phy_disconnected(sas_phy);
 587                asd_deform_port(asd_ha, phy);
 588                sas_ha->notify_port_event(sas_phy, PORTE_TIMER_EVENT);
 589                break;
 590        default:
 591                ASD_DPRINTK("%s: phy%d: unknown event:0x%x\n", __func__,
 592                            phy_id, sb_opcode);
 593                ASD_DPRINTK("edb is 0x%x! dl->opcode is 0x%x\n",
 594                            edb, dl->opcode);
 595                ASD_DPRINTK("sb_opcode : 0x%x, phy_id: 0x%x\n",
 596                            sb_opcode, phy_id);
 597                ASD_DPRINTK("escb: vaddr: 0x%p, "
 598                            "dma_handle: 0x%llx, next: 0x%llx, "
 599                            "index:%d, opcode:0x%02x\n",
 600                            ascb->dma_scb.vaddr,
 601                            (unsigned long long)ascb->dma_scb.dma_handle,
 602                            (unsigned long long)
 603                            le64_to_cpu(ascb->scb->header.next_scb),
 604                            le16_to_cpu(ascb->scb->header.index),
 605                            ascb->scb->header.opcode);
 606
 607                break;
 608        }
 609out:
 610        asd_invalidate_edb(ascb, edb);
 611}
 612
 613int asd_init_post_escbs(struct asd_ha_struct *asd_ha)
 614{
 615        struct asd_seq_data *seq = &asd_ha->seq;
 616        int i;
 617
 618        for (i = 0; i < seq->num_escbs; i++)
 619                seq->escb_arr[i]->tasklet_complete = escb_tasklet_complete;
 620
 621        ASD_DPRINTK("posting %d escbs\n", i);
 622        return asd_post_escb_list(asd_ha, seq->escb_arr[0], seq->num_escbs);
 623}
 624
 625/* ---------- CONTROL PHY ---------- */
 626
 627#define CONTROL_PHY_STATUS (CURRENT_DEVICE_PRESENT | CURRENT_OOB_DONE   \
 628                            | CURRENT_SPINUP_HOLD | CURRENT_GTO_TIMEOUT \
 629                            | CURRENT_OOB_ERROR)
 630
 631/**
 632 * control_phy_tasklet_complete -- tasklet complete for CONTROL PHY ascb
 633 * @ascb: pointer to an ascb
 634 * @dl: pointer to the done list entry
 635 *
 636 * This function completes a CONTROL PHY scb and frees the ascb.
 637 * A note on LEDs:
 638 *  - an LED blinks if there is IO though it,
 639 *  - if a device is connected to the LED, it is lit,
 640 *  - if no device is connected to the LED, is is dimmed (off).
 641 */
 642static void control_phy_tasklet_complete(struct asd_ascb *ascb,
 643                                         struct done_list_struct *dl)
 644{
 645        struct asd_ha_struct *asd_ha = ascb->ha;
 646        struct scb *scb = ascb->scb;
 647        struct control_phy *control_phy = &scb->control_phy;
 648        u8 phy_id = control_phy->phy_id;
 649        struct asd_phy *phy = &ascb->ha->phys[phy_id];
 650
 651        u8 status     = dl->status_block[0];
 652        u8 oob_status = dl->status_block[1];
 653        u8 oob_mode   = dl->status_block[2];
 654        /* u8 oob_signals= dl->status_block[3]; */
 655
 656        if (status != 0) {
 657                ASD_DPRINTK("%s: phy%d status block opcode:0x%x\n",
 658                            __func__, phy_id, status);
 659                goto out;
 660        }
 661
 662        switch (control_phy->sub_func) {
 663        case DISABLE_PHY:
 664                asd_ha->hw_prof.enabled_phys &= ~(1 << phy_id);
 665                asd_turn_led(asd_ha, phy_id, 0);
 666                asd_control_led(asd_ha, phy_id, 0);
 667                ASD_DPRINTK("%s: disable phy%d\n", __func__, phy_id);
 668                break;
 669
 670        case ENABLE_PHY:
 671                asd_control_led(asd_ha, phy_id, 1);
 672                if (oob_status & CURRENT_OOB_DONE) {
 673                        asd_ha->hw_prof.enabled_phys |= (1 << phy_id);
 674                        get_lrate_mode(phy, oob_mode);
 675                        asd_turn_led(asd_ha, phy_id, 1);
 676                        ASD_DPRINTK("%s: phy%d, lrate:0x%x, proto:0x%x\n",
 677                                    __func__, phy_id,phy->sas_phy.linkrate,
 678                                    phy->sas_phy.iproto);
 679                } else if (oob_status & CURRENT_SPINUP_HOLD) {
 680                        asd_ha->hw_prof.enabled_phys |= (1 << phy_id);
 681                        asd_turn_led(asd_ha, phy_id, 1);
 682                        ASD_DPRINTK("%s: phy%d, spinup hold\n", __func__,
 683                                    phy_id);
 684                } else if (oob_status & CURRENT_ERR_MASK) {
 685                        asd_turn_led(asd_ha, phy_id, 0);
 686                        ASD_DPRINTK("%s: phy%d: error: oob status:0x%02x\n",
 687                                    __func__, phy_id, oob_status);
 688                } else if (oob_status & (CURRENT_HOT_PLUG_CNCT
 689                                         | CURRENT_DEVICE_PRESENT))  {
 690                        asd_ha->hw_prof.enabled_phys |= (1 << phy_id);
 691                        asd_turn_led(asd_ha, phy_id, 1);
 692                        ASD_DPRINTK("%s: phy%d: hot plug or device present\n",
 693                                    __func__, phy_id);
 694                } else {
 695                        asd_ha->hw_prof.enabled_phys |= (1 << phy_id);
 696                        asd_turn_led(asd_ha, phy_id, 0);
 697                        ASD_DPRINTK("%s: phy%d: no device present: "
 698                                    "oob_status:0x%x\n",
 699                                    __func__, phy_id, oob_status);
 700                }
 701                break;
 702        case RELEASE_SPINUP_HOLD:
 703        case PHY_NO_OP:
 704        case EXECUTE_HARD_RESET:
 705                ASD_DPRINTK("%s: phy%d: sub_func:0x%x\n", __func__,
 706                            phy_id, control_phy->sub_func);
 707                /* XXX finish */
 708                break;
 709        default:
 710                ASD_DPRINTK("%s: phy%d: sub_func:0x%x?\n", __func__,
 711                            phy_id, control_phy->sub_func);
 712                break;
 713        }
 714out:
 715        asd_ascb_free(ascb);
 716}
 717
 718static void set_speed_mask(u8 *speed_mask, struct asd_phy_desc *pd)
 719{
 720        /* disable all speeds, then enable defaults */
 721        *speed_mask = SAS_SPEED_60_DIS | SAS_SPEED_30_DIS | SAS_SPEED_15_DIS
 722                | SATA_SPEED_30_DIS | SATA_SPEED_15_DIS;
 723
 724        switch (pd->max_sas_lrate) {
 725        case SAS_LINK_RATE_6_0_GBPS:
 726                *speed_mask &= ~SAS_SPEED_60_DIS;
 727        default:
 728        case SAS_LINK_RATE_3_0_GBPS:
 729                *speed_mask &= ~SAS_SPEED_30_DIS;
 730        case SAS_LINK_RATE_1_5_GBPS:
 731                *speed_mask &= ~SAS_SPEED_15_DIS;
 732        }
 733
 734        switch (pd->min_sas_lrate) {
 735        case SAS_LINK_RATE_6_0_GBPS:
 736                *speed_mask |= SAS_SPEED_30_DIS;
 737        case SAS_LINK_RATE_3_0_GBPS:
 738                *speed_mask |= SAS_SPEED_15_DIS;
 739        default:
 740        case SAS_LINK_RATE_1_5_GBPS:
 741                /* nothing to do */
 742                ;
 743        }
 744
 745        switch (pd->max_sata_lrate) {
 746        case SAS_LINK_RATE_3_0_GBPS:
 747                *speed_mask &= ~SATA_SPEED_30_DIS;
 748        default:
 749        case SAS_LINK_RATE_1_5_GBPS:
 750                *speed_mask &= ~SATA_SPEED_15_DIS;
 751        }
 752
 753        switch (pd->min_sata_lrate) {
 754        case SAS_LINK_RATE_3_0_GBPS:
 755                *speed_mask |= SATA_SPEED_15_DIS;
 756        default:
 757        case SAS_LINK_RATE_1_5_GBPS:
 758                /* nothing to do */
 759                ;
 760        }
 761}
 762
 763/**
 764 * asd_build_control_phy -- build a CONTROL PHY SCB
 765 * @ascb: pointer to an ascb
 766 * @phy_id: phy id to control, integer
 767 * @subfunc: subfunction, what to actually to do the phy
 768 *
 769 * This function builds a CONTROL PHY scb.  No allocation of any kind
 770 * is performed. @ascb is allocated with the list function.
 771 * The caller can override the ascb->tasklet_complete to point
 772 * to its own callback function.  It must call asd_ascb_free()
 773 * at its tasklet complete function.
 774 * See the default implementation.
 775 */
 776void asd_build_control_phy(struct asd_ascb *ascb, int phy_id, u8 subfunc)
 777{
 778        struct asd_phy *phy = &ascb->ha->phys[phy_id];
 779        struct scb *scb = ascb->scb;
 780        struct control_phy *control_phy = &scb->control_phy;
 781
 782        scb->header.opcode = CONTROL_PHY;
 783        control_phy->phy_id = (u8) phy_id;
 784        control_phy->sub_func = subfunc;
 785
 786        switch (subfunc) {
 787        case EXECUTE_HARD_RESET:  /* 0x81 */
 788        case ENABLE_PHY:          /* 0x01 */
 789                /* decide hot plug delay */
 790                control_phy->hot_plug_delay = HOTPLUG_DELAY_TIMEOUT;
 791
 792                /* decide speed mask */
 793                set_speed_mask(&control_phy->speed_mask, phy->phy_desc);
 794
 795                /* initiator port settings are in the hi nibble */
 796                if (phy->sas_phy.role == PHY_ROLE_INITIATOR)
 797                        control_phy->port_type = SAS_PROTOCOL_ALL << 4;
 798                else if (phy->sas_phy.role == PHY_ROLE_TARGET)
 799                        control_phy->port_type = SAS_PROTOCOL_ALL;
 800                else
 801                        control_phy->port_type =
 802                                (SAS_PROTOCOL_ALL << 4) | SAS_PROTOCOL_ALL;
 803
 804                /* link reset retries, this should be nominal */
 805                control_phy->link_reset_retries = 10;
 806
 807        case RELEASE_SPINUP_HOLD: /* 0x02 */
 808                /* decide the func_mask */
 809                control_phy->func_mask = FUNCTION_MASK_DEFAULT;
 810                if (phy->phy_desc->flags & ASD_SATA_SPINUP_HOLD)
 811                        control_phy->func_mask &= ~SPINUP_HOLD_DIS;
 812                else
 813                        control_phy->func_mask |= SPINUP_HOLD_DIS;
 814        }
 815
 816        control_phy->conn_handle = cpu_to_le16(0xFFFF);
 817
 818        ascb->tasklet_complete = control_phy_tasklet_complete;
 819}
 820
 821/* ---------- INITIATE LINK ADM TASK ---------- */
 822
 823#if 0
 824
 825static void link_adm_tasklet_complete(struct asd_ascb *ascb,
 826                                      struct done_list_struct *dl)
 827{
 828        u8 opcode = dl->opcode;
 829        struct initiate_link_adm *link_adm = &ascb->scb->link_adm;
 830        u8 phy_id = link_adm->phy_id;
 831
 832        if (opcode != TC_NO_ERROR) {
 833                asd_printk("phy%d: link adm task 0x%x completed with error "
 834                           "0x%x\n", phy_id, link_adm->sub_func, opcode);
 835        }
 836        ASD_DPRINTK("phy%d: link adm task 0x%x: 0x%x\n",
 837                    phy_id, link_adm->sub_func, opcode);
 838
 839        asd_ascb_free(ascb);
 840}
 841
 842void asd_build_initiate_link_adm_task(struct asd_ascb *ascb, int phy_id,
 843                                      u8 subfunc)
 844{
 845        struct scb *scb = ascb->scb;
 846        struct initiate_link_adm *link_adm = &scb->link_adm;
 847
 848        scb->header.opcode = INITIATE_LINK_ADM_TASK;
 849
 850        link_adm->phy_id = phy_id;
 851        link_adm->sub_func = subfunc;
 852        link_adm->conn_handle = cpu_to_le16(0xFFFF);
 853
 854        ascb->tasklet_complete = link_adm_tasklet_complete;
 855}
 856
 857#endif  /*  0  */
 858
 859/* ---------- SCB timer ---------- */
 860
 861/**
 862 * asd_ascb_timedout -- called when a pending SCB's timer has expired
 863 * @data: unsigned long, a pointer to the ascb in question
 864 *
 865 * This is the default timeout function which does the most necessary.
 866 * Upper layers can implement their own timeout function, say to free
 867 * resources they have with this SCB, and then call this one at the
 868 * end of their timeout function.  To do this, one should initialize
 869 * the ascb->timer.{function, data, expires} prior to calling the post
 870 * function. The timer is started by the post function.
 871 */
 872void asd_ascb_timedout(unsigned long data)
 873{
 874        struct asd_ascb *ascb = (void *) data;
 875        struct asd_seq_data *seq = &ascb->ha->seq;
 876        unsigned long flags;
 877
 878        ASD_DPRINTK("scb:0x%x timed out\n", ascb->scb->header.opcode);
 879
 880        spin_lock_irqsave(&seq->pend_q_lock, flags);
 881        seq->pending--;
 882        list_del_init(&ascb->list);
 883        spin_unlock_irqrestore(&seq->pend_q_lock, flags);
 884
 885        asd_ascb_free(ascb);
 886}
 887
 888/* ---------- CONTROL PHY ---------- */
 889
 890/* Given the spec value, return a driver value. */
 891static const int phy_func_table[] = {
 892        [PHY_FUNC_NOP]        = PHY_NO_OP,
 893        [PHY_FUNC_LINK_RESET] = ENABLE_PHY,
 894        [PHY_FUNC_HARD_RESET] = EXECUTE_HARD_RESET,
 895        [PHY_FUNC_DISABLE]    = DISABLE_PHY,
 896        [PHY_FUNC_RELEASE_SPINUP_HOLD] = RELEASE_SPINUP_HOLD,
 897};
 898
 899int asd_control_phy(struct asd_sas_phy *phy, enum phy_func func, void *arg)
 900{
 901        struct asd_ha_struct *asd_ha = phy->ha->lldd_ha;
 902        struct asd_phy_desc *pd = asd_ha->phys[phy->id].phy_desc;
 903        struct asd_ascb *ascb;
 904        struct sas_phy_linkrates *rates;
 905        int res = 1;
 906
 907        switch (func) {
 908        case PHY_FUNC_CLEAR_ERROR_LOG:
 909                return -ENOSYS;
 910        case PHY_FUNC_SET_LINK_RATE:
 911                rates = arg;
 912                if (rates->minimum_linkrate) {
 913                        pd->min_sas_lrate = rates->minimum_linkrate;
 914                        pd->min_sata_lrate = rates->minimum_linkrate;
 915                }
 916                if (rates->maximum_linkrate) {
 917                        pd->max_sas_lrate = rates->maximum_linkrate;
 918                        pd->max_sata_lrate = rates->maximum_linkrate;
 919                }
 920                func = PHY_FUNC_LINK_RESET;
 921                break;
 922        default:
 923                break;
 924        }
 925
 926        ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL);
 927        if (!ascb)
 928                return -ENOMEM;
 929
 930        asd_build_control_phy(ascb, phy->id, phy_func_table[func]);
 931        res = asd_post_ascb_list(asd_ha, ascb , 1);
 932        if (res)
 933                asd_ascb_free(ascb);
 934
 935        return res;
 936}
 937