drivers/scsi/aic94xx/aic94xx_scb.c

   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
  54 static 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
  85 static 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. */
 129 static 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  */
 154 static 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
 171 static 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
 220 static 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
 235 static 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
 258 static 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         }
 307 out:
 308         ;
 309 }
 310
 311 static 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  */
 382 void 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
 415 static 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         }
 609 out:
 610         asd_invalidate_edb(ascb, edb);
 611 }
 612
 613 int 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  */
 642 static 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         }
 714 out:
 715         asd_ascb_free(ascb);
 716 }
 717
 718 static 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  */
 776 void 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
 825 static 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
 842 void 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  */
 872 void 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. */
 891 static 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
 899 int 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         case PHY_FUNC_GET_EVENTS:
 910                 return -ENOSYS;
 911         case PHY_FUNC_SET_LINK_RATE:
 912                 rates = arg;
 913                 if (rates->minimum_linkrate) {
 914                         pd->min_sas_lrate = rates->minimum_linkrate;
 915                         pd->min_sata_lrate = rates->minimum_linkrate;
 916                 }
 917                 if (rates->maximum_linkrate) {
 918                         pd->max_sas_lrate = rates->maximum_linkrate;
 919                         pd->max_sata_lrate = rates->maximum_linkrate;
 920                 }
 921                 func = PHY_FUNC_LINK_RESET;
 922                 break;
 923         default:
 924                 break;
 925         }
 926
 927         ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL);
 928         if (!ascb)
 929                 return -ENOMEM;
 930
 931         asd_build_control_phy(ascb, phy->id, phy_func_table[func]);
 932         res = asd_post_ascb_list(asd_ha, ascb , 1);
 933         if (res)
 934                 asd_ascb_free(ascb);
 935
 936         return res;
 937 }