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