drivers/scsi/aic94xx/aic94xx_scb.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Aic94xx SAS/SATA driver SCB management.
   4  *
   5  * Copyright (C) 2005 Adaptec, Inc.  All rights reserved.
   6  * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
   7  */
   8
   9 #include <linux/gfp.h>
  10 #include <scsi/scsi_host.h>
  11
  12 #include "aic94xx.h"
  13 #include "aic94xx_reg.h"
  14 #include "aic94xx_hwi.h"
  15 #include "aic94xx_seq.h"
  16
  17 #include "aic94xx_dump.h"
  18
  19 /* ---------- EMPTY SCB ---------- */
  20
  21 #define DL_PHY_MASK      7
  22 #define BYTES_DMAED      0
  23 #define PRIMITIVE_RECVD  0x08
  24 #define PHY_EVENT        0x10
  25 #define LINK_RESET_ERROR 0x18
  26 #define TIMER_EVENT      0x20
  27 #define REQ_TASK_ABORT   0xF0
  28 #define REQ_DEVICE_RESET 0xF1
  29 #define SIGNAL_NCQ_ERROR 0xF2
  30 #define CLEAR_NCQ_ERROR  0xF3
  31
  32 #define PHY_EVENTS_STATUS (CURRENT_LOSS_OF_SIGNAL | CURRENT_OOB_DONE   \
  33                            | CURRENT_SPINUP_HOLD | CURRENT_GTO_TIMEOUT \
  34                            | CURRENT_OOB_ERROR)
  35
  36 static void get_lrate_mode(struct asd_phy *phy, u8 oob_mode)
  37 {
  38         struct sas_phy *sas_phy = phy->sas_phy.phy;
  39
  40         switch (oob_mode & 7) {
  41         case PHY_SPEED_60:
  42                 /* FIXME: sas transport class doesn't have this */
  43                 phy->sas_phy.linkrate = SAS_LINK_RATE_6_0_GBPS;
  44                 phy->sas_phy.phy->negotiated_linkrate = SAS_LINK_RATE_6_0_GBPS;
  45                 break;
  46         case PHY_SPEED_30:
  47                 phy->sas_phy.linkrate = SAS_LINK_RATE_3_0_GBPS;
  48                 phy->sas_phy.phy->negotiated_linkrate = SAS_LINK_RATE_3_0_GBPS;
  49                 break;
  50         case PHY_SPEED_15:
  51                 phy->sas_phy.linkrate = SAS_LINK_RATE_1_5_GBPS;
  52                 phy->sas_phy.phy->negotiated_linkrate = SAS_LINK_RATE_1_5_GBPS;
  53                 break;
  54         }
  55         sas_phy->negotiated_linkrate = phy->sas_phy.linkrate;
  56         sas_phy->maximum_linkrate_hw = SAS_LINK_RATE_3_0_GBPS;
  57         sas_phy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
  58         sas_phy->maximum_linkrate = phy->phy_desc->max_sas_lrate;
  59         sas_phy->minimum_linkrate = phy->phy_desc->min_sas_lrate;
  60
  61         if (oob_mode & SAS_MODE)
  62                 phy->sas_phy.oob_mode = SAS_OOB_MODE;
  63         else if (oob_mode & SATA_MODE)
  64                 phy->sas_phy.oob_mode = SATA_OOB_MODE;
  65 }
  66
  67 static void asd_phy_event_tasklet(struct asd_ascb *ascb,
  68                                          struct done_list_struct *dl)
  69 {
  70         struct asd_ha_struct *asd_ha = ascb->ha;
  71         int phy_id = dl->status_block[0] & DL_PHY_MASK;
  72         struct asd_phy *phy = &asd_ha->phys[phy_id];
  73
  74         u8 oob_status = dl->status_block[1] & PHY_EVENTS_STATUS;
  75         u8 oob_mode   = dl->status_block[2];
  76
  77         switch (oob_status) {
  78         case CURRENT_LOSS_OF_SIGNAL:
  79                 /* directly attached device was removed */
  80                 ASD_DPRINTK("phy%d: device unplugged\n", phy_id);
  81                 asd_turn_led(asd_ha, phy_id, 0);
  82                 sas_phy_disconnected(&phy->sas_phy);
  83                 sas_notify_phy_event(&phy->sas_phy, PHYE_LOSS_OF_SIGNAL,
  84                                      GFP_ATOMIC);
  85                 break;
  86         case CURRENT_OOB_DONE:
  87                 /* hot plugged device */
  88                 asd_turn_led(asd_ha, phy_id, 1);
  89                 get_lrate_mode(phy, oob_mode);
  90                 ASD_DPRINTK("phy%d device plugged: lrate:0x%x, proto:0x%x\n",
  91                             phy_id, phy->sas_phy.linkrate, phy->sas_phy.iproto);
  92                 sas_notify_phy_event(&phy->sas_phy, PHYE_OOB_DONE, GFP_ATOMIC);
  93                 break;
  94         case CURRENT_SPINUP_HOLD:
  95                 /* hot plug SATA, no COMWAKE sent */
  96                 asd_turn_led(asd_ha, phy_id, 1);
  97                 sas_notify_phy_event(&phy->sas_phy, PHYE_SPINUP_HOLD,
  98                                      GFP_ATOMIC);
  99                 break;
 100         case CURRENT_GTO_TIMEOUT:
 101         case CURRENT_OOB_ERROR:
 102                 ASD_DPRINTK("phy%d error while OOB: oob status:0x%x\n", phy_id,
 103                             dl->status_block[1]);
 104                 asd_turn_led(asd_ha, phy_id, 0);
 105                 sas_phy_disconnected(&phy->sas_phy);
 106                 sas_notify_phy_event(&phy->sas_phy, PHYE_OOB_ERROR, GFP_ATOMIC);
 107                 break;
 108         }
 109 }
 110
 111 /* If phys are enabled sparsely, this will do the right thing. */
 112 static unsigned ord_phy(struct asd_ha_struct *asd_ha, struct asd_phy *phy)
 113 {
 114         u8 enabled_mask = asd_ha->hw_prof.enabled_phys;
 115         int i, k = 0;
 116
 117         for_each_phy(enabled_mask, enabled_mask, i) {
 118                 if (&asd_ha->phys[i] == phy)
 119                         return k;
 120                 k++;
 121         }
 122         return 0;
 123 }
 124
 125 /**
 126  * asd_get_attached_sas_addr -- extract/generate attached SAS address
 127  * @phy: pointer to asd_phy
 128  * @sas_addr: pointer to buffer where the SAS address is to be written
 129  *
 130  * This function extracts the SAS address from an IDENTIFY frame
 131  * received.  If OOB is SATA, then a SAS address is generated from the
 132  * HA tables.
 133  *
 134  * LOCKING: the frame_rcvd_lock needs to be held since this parses the frame
 135  * buffer.
 136  */
 137 static void asd_get_attached_sas_addr(struct asd_phy *phy, u8 *sas_addr)
 138 {
 139         if (phy->sas_phy.frame_rcvd[0] == 0x34
 140             && phy->sas_phy.oob_mode == SATA_OOB_MODE) {
 141                 struct asd_ha_struct *asd_ha = phy->sas_phy.ha->lldd_ha;
 142                 /* FIS device-to-host */
 143                 u64 addr = be64_to_cpu(*(__be64 *)phy->phy_desc->sas_addr);
 144
 145                 addr += asd_ha->hw_prof.sata_name_base + ord_phy(asd_ha, phy);
 146                 *(__be64 *)sas_addr = cpu_to_be64(addr);
 147         } else {
 148                 struct sas_identify_frame *idframe =
 149                         (void *) phy->sas_phy.frame_rcvd;
 150                 memcpy(sas_addr, idframe->sas_addr, SAS_ADDR_SIZE);
 151         }
 152 }
 153
 154 static void asd_form_port(struct asd_ha_struct *asd_ha, struct asd_phy *phy)
 155 {
 156         int i;
 157         struct asd_port *free_port = NULL;
 158         struct asd_port *port;
 159         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 160         unsigned long flags;
 161
 162         spin_lock_irqsave(&asd_ha->asd_ports_lock, flags);
 163         if (!phy->asd_port) {
 164                 for (i = 0; i < ASD_MAX_PHYS; i++) {
 165                         port = &asd_ha->asd_ports[i];
 166
 167                         /* Check for wide port */
 168                         if (port->num_phys > 0 &&
 169                             memcmp(port->sas_addr, sas_phy->sas_addr,
 170                                    SAS_ADDR_SIZE) == 0 &&
 171                             memcmp(port->attached_sas_addr,
 172                                    sas_phy->attached_sas_addr,
 173                                    SAS_ADDR_SIZE) == 0) {
 174                                 break;
 175                         }
 176
 177                         /* Find a free port */
 178                         if (port->num_phys == 0 && free_port == NULL) {
 179                                 free_port = port;
 180                         }
 181                 }
 182
 183                 /* Use a free port if this doesn't form a wide port */
 184                 if (i >= ASD_MAX_PHYS) {
 185                         port = free_port;
 186                         BUG_ON(!port);
 187                         memcpy(port->sas_addr, sas_phy->sas_addr,
 188                                SAS_ADDR_SIZE);
 189                         memcpy(port->attached_sas_addr,
 190                                sas_phy->attached_sas_addr,
 191                                SAS_ADDR_SIZE);
 192                 }
 193                 port->num_phys++;
 194                 port->phy_mask |= (1U << sas_phy->id);
 195                 phy->asd_port = port;
 196         }
 197         ASD_DPRINTK("%s: updating phy_mask 0x%x for phy%d\n",
 198                     __func__, phy->asd_port->phy_mask, sas_phy->id);
 199         asd_update_port_links(asd_ha, phy);
 200         spin_unlock_irqrestore(&asd_ha->asd_ports_lock, flags);
 201 }
 202
 203 static void asd_deform_port(struct asd_ha_struct *asd_ha, struct asd_phy *phy)
 204 {
 205         struct asd_port *port = phy->asd_port;
 206         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 207         unsigned long flags;
 208
 209         spin_lock_irqsave(&asd_ha->asd_ports_lock, flags);
 210         if (port) {
 211                 port->num_phys--;
 212                 port->phy_mask &= ~(1U << sas_phy->id);
 213                 phy->asd_port = NULL;
 214         }
 215         spin_unlock_irqrestore(&asd_ha->asd_ports_lock, flags);
 216 }
 217
 218 static void asd_bytes_dmaed_tasklet(struct asd_ascb *ascb,
 219                                     struct done_list_struct *dl,
 220                                     int edb_id, int phy_id)
 221 {
 222         unsigned long flags;
 223         int edb_el = edb_id + ascb->edb_index;
 224         struct asd_dma_tok *edb = ascb->ha->seq.edb_arr[edb_el];
 225         struct asd_phy *phy = &ascb->ha->phys[phy_id];
 226         u16 size = ((dl->status_block[3] & 7) << 8) | dl->status_block[2];
 227
 228         size = min(size, (u16) sizeof(phy->frame_rcvd));
 229
 230         spin_lock_irqsave(&phy->sas_phy.frame_rcvd_lock, flags);
 231         memcpy(phy->sas_phy.frame_rcvd, edb->vaddr, size);
 232         phy->sas_phy.frame_rcvd_size = size;
 233         asd_get_attached_sas_addr(phy, phy->sas_phy.attached_sas_addr);
 234         spin_unlock_irqrestore(&phy->sas_phy.frame_rcvd_lock, flags);
 235         asd_dump_frame_rcvd(phy, dl);
 236         asd_form_port(ascb->ha, phy);
 237         sas_notify_port_event(&phy->sas_phy, PORTE_BYTES_DMAED, GFP_ATOMIC);
 238 }
 239
 240 static void asd_link_reset_err_tasklet(struct asd_ascb *ascb,
 241                                        struct done_list_struct *dl,
 242                                        int phy_id)
 243 {
 244         struct asd_ha_struct *asd_ha = ascb->ha;
 245         struct sas_ha_struct *sas_ha = &asd_ha->sas_ha;
 246         struct asd_sas_phy *sas_phy = sas_ha->sas_phy[phy_id];
 247         struct asd_phy *phy = &asd_ha->phys[phy_id];
 248         u8 lr_error = dl->status_block[1];
 249         u8 retries_left = dl->status_block[2];
 250
 251         switch (lr_error) {
 252         case 0:
 253                 ASD_DPRINTK("phy%d: Receive ID timer expired\n", phy_id);
 254                 break;
 255         case 1:
 256                 ASD_DPRINTK("phy%d: Loss of signal\n", phy_id);
 257                 break;
 258         case 2:
 259                 ASD_DPRINTK("phy%d: Loss of dword sync\n", phy_id);
 260                 break;
 261         case 3:
 262                 ASD_DPRINTK("phy%d: Receive FIS timeout\n", phy_id);
 263                 break;
 264         default:
 265                 ASD_DPRINTK("phy%d: unknown link reset error code: 0x%x\n",
 266                             phy_id, lr_error);
 267                 break;
 268         }
 269
 270         asd_turn_led(asd_ha, phy_id, 0);
 271         sas_phy_disconnected(sas_phy);
 272         asd_deform_port(asd_ha, phy);
 273         sas_notify_port_event(sas_phy, PORTE_LINK_RESET_ERR, GFP_ATOMIC);
 274
 275         if (retries_left == 0) {
 276                 int num = 1;
 277                 struct asd_ascb *cp = asd_ascb_alloc_list(ascb->ha, &num,
 278                                                           GFP_ATOMIC);
 279                 if (!cp) {
 280                         asd_printk("%s: out of memory\n", __func__);
 281                         goto out;
 282                 }
 283                 ASD_DPRINTK("phy%d: retries:0 performing link reset seq\n",
 284                             phy_id);
 285                 asd_build_control_phy(cp, phy_id, ENABLE_PHY);
 286                 if (asd_post_ascb_list(ascb->ha, cp, 1) != 0)
 287                         asd_ascb_free(cp);
 288         }
 289 out:
 290         ;
 291 }
 292
 293 static void asd_primitive_rcvd_tasklet(struct asd_ascb *ascb,
 294                                        struct done_list_struct *dl,
 295                                        int phy_id)
 296 {
 297         unsigned long flags;
 298         struct sas_ha_struct *sas_ha = &ascb->ha->sas_ha;
 299         struct asd_sas_phy *sas_phy = sas_ha->sas_phy[phy_id];
 300         struct asd_ha_struct *asd_ha = ascb->ha;
 301         struct asd_phy *phy = &asd_ha->phys[phy_id];
 302         u8  reg  = dl->status_block[1];
 303         u32 cont = dl->status_block[2] << ((reg & 3)*8);
 304
 305         reg &= ~3;
 306         switch (reg) {
 307         case LmPRMSTAT0BYTE0:
 308                 switch (cont) {
 309                 case LmBROADCH:
 310                 case LmBROADRVCH0:
 311                 case LmBROADRVCH1:
 312                 case LmBROADSES:
 313                         ASD_DPRINTK("phy%d: BROADCAST change received:%d\n",
 314                                     phy_id, cont);
 315                         spin_lock_irqsave(&sas_phy->sas_prim_lock, flags);
 316                         sas_phy->sas_prim = ffs(cont);
 317                         spin_unlock_irqrestore(&sas_phy->sas_prim_lock, flags);
 318                         sas_notify_port_event(sas_phy, PORTE_BROADCAST_RCVD,
 319                                               GFP_ATOMIC);
 320                         break;
 321
 322                 case LmUNKNOWNP:
 323                         ASD_DPRINTK("phy%d: unknown BREAK\n", phy_id);
 324                         break;
 325
 326                 default:
 327                         ASD_DPRINTK("phy%d: primitive reg:0x%x, cont:0x%04x\n",
 328                                     phy_id, reg, cont);
 329                         break;
 330                 }
 331                 break;
 332         case LmPRMSTAT1BYTE0:
 333                 switch (cont) {
 334                 case LmHARDRST:
 335                         ASD_DPRINTK("phy%d: HARD_RESET primitive rcvd\n",
 336                                     phy_id);
 337                         /* The sequencer disables all phys on that port.
 338                          * We have to re-enable the phys ourselves. */
 339                         asd_deform_port(asd_ha, phy);
 340                         sas_notify_port_event(sas_phy, PORTE_HARD_RESET,
 341                                               GFP_ATOMIC);
 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         default:
 351                 ASD_DPRINTK("unknown primitive register:0x%x\n",
 352                             dl->status_block[1]);
 353                 break;
 354         }
 355 }
 356
 357 /**
 358  * asd_invalidate_edb -- invalidate an EDB and if necessary post the ESCB
 359  * @ascb: pointer to Empty SCB
 360  * @edb_id: index [0,6] to the empty data buffer which is to be invalidated
 361  *
 362  * After an EDB has been invalidated, if all EDBs in this ESCB have been
 363  * invalidated, the ESCB is posted back to the sequencer.
 364  * Context is tasklet/IRQ.
 365  */
 366 void asd_invalidate_edb(struct asd_ascb *ascb, int edb_id)
 367 {
 368         struct asd_seq_data *seq = &ascb->ha->seq;
 369         struct empty_scb *escb = &ascb->scb->escb;
 370         struct sg_el     *eb   = &escb->eb[edb_id];
 371         struct asd_dma_tok *edb = seq->edb_arr[ascb->edb_index + edb_id];
 372
 373         memset(edb->vaddr, 0, ASD_EDB_SIZE);
 374         eb->flags |= ELEMENT_NOT_VALID;
 375         escb->num_valid--;
 376
 377         if (escb->num_valid == 0) {
 378                 int i;
 379                 /* ASD_DPRINTK("reposting escb: vaddr: 0x%p, "
 380                             "dma_handle: 0x%08llx, next: 0x%08llx, "
 381                             "index:%d, opcode:0x%02x\n",
 382                             ascb->dma_scb.vaddr,
 383                             (u64)ascb->dma_scb.dma_handle,
 384                             le64_to_cpu(ascb->scb->header.next_scb),
 385                             le16_to_cpu(ascb->scb->header.index),
 386                             ascb->scb->header.opcode);
 387                 */
 388                 escb->num_valid = ASD_EDBS_PER_SCB;
 389                 for (i = 0; i < ASD_EDBS_PER_SCB; i++)
 390                         escb->eb[i].flags = 0;
 391                 if (!list_empty(&ascb->list))
 392                         list_del_init(&ascb->list);
 393                 i = asd_post_escb_list(ascb->ha, ascb, 1);
 394                 if (i)
 395                         asd_printk("couldn't post escb, err:%d\n", i);
 396         }
 397 }
 398
 399 static void escb_tasklet_complete(struct asd_ascb *ascb,
 400                                   struct done_list_struct *dl)
 401 {
 402         struct asd_ha_struct *asd_ha = ascb->ha;
 403         struct sas_ha_struct *sas_ha = &asd_ha->sas_ha;
 404         int edb = (dl->opcode & DL_PHY_MASK) - 1; /* [0xc1,0xc7] -> [0,6] */
 405         u8  sb_opcode = dl->status_block[0];
 406         int phy_id = sb_opcode & DL_PHY_MASK;
 407         struct asd_sas_phy *sas_phy = sas_ha->sas_phy[phy_id];
 408         struct asd_phy *phy = &asd_ha->phys[phy_id];
 409
 410         if (edb > 6 || edb < 0) {
 411                 ASD_DPRINTK("edb is 0x%x! dl->opcode is 0x%x\n",
 412                             edb, dl->opcode);
 413                 ASD_DPRINTK("sb_opcode : 0x%x, phy_id: 0x%x\n",
 414                             sb_opcode, phy_id);
 415                 ASD_DPRINTK("escb: vaddr: 0x%p, "
 416                             "dma_handle: 0x%llx, next: 0x%llx, "
 417                             "index:%d, opcode:0x%02x\n",
 418                             ascb->dma_scb.vaddr,
 419                             (unsigned long long)ascb->dma_scb.dma_handle,
 420                             (unsigned long long)
 421                             le64_to_cpu(ascb->scb->header.next_scb),
 422                             le16_to_cpu(ascb->scb->header.index),
 423                             ascb->scb->header.opcode);
 424         }
 425
 426         /* Catch these before we mask off the sb_opcode bits */
 427         switch (sb_opcode) {
 428         case REQ_TASK_ABORT: {
 429                 struct asd_ascb *a, *b;
 430                 u16 tc_abort;
 431                 struct domain_device *failed_dev = NULL;
 432
 433                 ASD_DPRINTK("%s: REQ_TASK_ABORT, reason=0x%X\n",
 434                             __func__, dl->status_block[3]);
 435
 436                 /*
 437                  * Find the task that caused the abort and abort it first.
 438                  * The sequencer won't put anything on the done list until
 439                  * that happens.
 440                  */
 441                 tc_abort = *((u16*)(&dl->status_block[1]));
 442                 tc_abort = le16_to_cpu(tc_abort);
 443
 444                 list_for_each_entry_safe(a, b, &asd_ha->seq.pend_q, list) {
 445                         struct sas_task *task = a->uldd_task;
 446
 447                         if (a->tc_index != tc_abort)
 448                                 continue;
 449
 450                         if (task) {
 451                                 failed_dev = task->dev;
 452                                 sas_task_abort(task);
 453                         } else {
 454                                 ASD_DPRINTK("R_T_A for non TASK scb 0x%x\n",
 455                                             a->scb->header.opcode);
 456                         }
 457                         break;
 458                 }
 459
 460                 if (!failed_dev) {
 461                         ASD_DPRINTK("%s: Can't find task (tc=%d) to abort!\n",
 462                                     __func__, tc_abort);
 463                         goto out;
 464                 }
 465
 466                 /*
 467                  * Now abort everything else for that device (hba?) so
 468                  * that the EH will wake up and do something.
 469                  */
 470                 list_for_each_entry_safe(a, b, &asd_ha->seq.pend_q, list) {
 471                         struct sas_task *task = a->uldd_task;
 472
 473                         if (task &&
 474                             task->dev == failed_dev &&
 475                             a->tc_index != tc_abort)
 476                                 sas_task_abort(task);
 477                 }
 478
 479                 goto out;
 480         }
 481         case REQ_DEVICE_RESET: {
 482                 struct asd_ascb *a;
 483                 u16 conn_handle;
 484                 unsigned long flags;
 485                 struct sas_task *last_dev_task = NULL;
 486
 487                 conn_handle = *((u16*)(&dl->status_block[1]));
 488                 conn_handle = le16_to_cpu(conn_handle);
 489
 490                 ASD_DPRINTK("%s: REQ_DEVICE_RESET, reason=0x%X\n", __func__,
 491                             dl->status_block[3]);
 492
 493                 /* Find the last pending task for the device... */
 494                 list_for_each_entry(a, &asd_ha->seq.pend_q, list) {
 495                         u16 x;
 496                         struct domain_device *dev;
 497                         struct sas_task *task = a->uldd_task;
 498
 499                         if (!task)
 500                                 continue;
 501                         dev = task->dev;
 502
 503                         x = (unsigned long)dev->lldd_dev;
 504                         if (x == conn_handle)
 505                                 last_dev_task = task;
 506                 }
 507
 508                 if (!last_dev_task) {
 509                         ASD_DPRINTK("%s: Device reset for idle device %d?\n",
 510                                     __func__, conn_handle);
 511                         goto out;
 512                 }
 513
 514                 /* ...and set the reset flag */
 515                 spin_lock_irqsave(&last_dev_task->task_state_lock, flags);
 516                 last_dev_task->task_state_flags |= SAS_TASK_NEED_DEV_RESET;
 517                 spin_unlock_irqrestore(&last_dev_task->task_state_lock, flags);
 518
 519                 /* Kill all pending tasks for the device */
 520                 list_for_each_entry(a, &asd_ha->seq.pend_q, list) {
 521                         u16 x;
 522                         struct domain_device *dev;
 523                         struct sas_task *task = a->uldd_task;
 524
 525                         if (!task)
 526                                 continue;
 527                         dev = task->dev;
 528
 529                         x = (unsigned long)dev->lldd_dev;
 530                         if (x == conn_handle)
 531                                 sas_task_abort(task);
 532                 }
 533
 534                 goto out;
 535         }
 536         case SIGNAL_NCQ_ERROR:
 537                 ASD_DPRINTK("%s: SIGNAL_NCQ_ERROR\n", __func__);
 538                 goto out;
 539         case CLEAR_NCQ_ERROR:
 540                 ASD_DPRINTK("%s: CLEAR_NCQ_ERROR\n", __func__);
 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", __func__, 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", __func__,
 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", __func__, 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", __func__,
 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                             __func__, 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_notify_port_event(sas_phy, PORTE_TIMER_EVENT, GFP_ATOMIC);
 573                 break;
 574         default:
 575                 ASD_DPRINTK("%s: phy%d: unknown event:0x%x\n", __func__,
 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                             __func__, 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", __func__, 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                                     __func__, 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", __func__,
 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                                     __func__, 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                                     __func__, 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                                     __func__, 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", __func__,
 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", __func__,
 695                             phy_id, control_phy->sub_func);
 696                 break;
 697         }
 698 out:
 699         asd_ascb_free(ascb);
 700 }
 701
 702 static 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                 fallthrough;
 712         default:
 713         case SAS_LINK_RATE_3_0_GBPS:
 714                 *speed_mask &= ~SAS_SPEED_30_DIS;
 715                 fallthrough;
 716         case SAS_LINK_RATE_1_5_GBPS:
 717                 *speed_mask &= ~SAS_SPEED_15_DIS;
 718         }
 719
 720         switch (pd->min_sas_lrate) {
 721         case SAS_LINK_RATE_6_0_GBPS:
 722                 *speed_mask |= SAS_SPEED_30_DIS;
 723                 fallthrough;
 724         case SAS_LINK_RATE_3_0_GBPS:
 725                 *speed_mask |= SAS_SPEED_15_DIS;
 726                 fallthrough;
 727         default:
 728         case SAS_LINK_RATE_1_5_GBPS:
 729                 /* nothing to do */
 730                 ;
 731         }
 732
 733         switch (pd->max_sata_lrate) {
 734         case SAS_LINK_RATE_3_0_GBPS:
 735                 *speed_mask &= ~SATA_SPEED_30_DIS;
 736                 fallthrough;
 737         default:
 738         case SAS_LINK_RATE_1_5_GBPS:
 739                 *speed_mask &= ~SATA_SPEED_15_DIS;
 740         }
 741
 742         switch (pd->min_sata_lrate) {
 743         case SAS_LINK_RATE_3_0_GBPS:
 744                 *speed_mask |= SATA_SPEED_15_DIS;
 745                 fallthrough;
 746         default:
 747         case SAS_LINK_RATE_1_5_GBPS:
 748                 /* nothing to do */
 749                 ;
 750         }
 751 }
 752
 753 /**
 754  * asd_build_control_phy -- build a CONTROL PHY SCB
 755  * @ascb: pointer to an ascb
 756  * @phy_id: phy id to control, integer
 757  * @subfunc: subfunction, what to actually to do the phy
 758  *
 759  * This function builds a CONTROL PHY scb.  No allocation of any kind
 760  * is performed. @ascb is allocated with the list function.
 761  * The caller can override the ascb->tasklet_complete to point
 762  * to its own callback function.  It must call asd_ascb_free()
 763  * at its tasklet complete function.
 764  * See the default implementation.
 765  */
 766 void asd_build_control_phy(struct asd_ascb *ascb, int phy_id, u8 subfunc)
 767 {
 768         struct asd_phy *phy = &ascb->ha->phys[phy_id];
 769         struct scb *scb = ascb->scb;
 770         struct control_phy *control_phy = &scb->control_phy;
 771
 772         scb->header.opcode = CONTROL_PHY;
 773         control_phy->phy_id = (u8) phy_id;
 774         control_phy->sub_func = subfunc;
 775
 776         switch (subfunc) {
 777         case EXECUTE_HARD_RESET:  /* 0x81 */
 778         case ENABLE_PHY:          /* 0x01 */
 779                 /* decide hot plug delay */
 780                 control_phy->hot_plug_delay = HOTPLUG_DELAY_TIMEOUT;
 781
 782                 /* decide speed mask */
 783                 set_speed_mask(&control_phy->speed_mask, phy->phy_desc);
 784
 785                 /* initiator port settings are in the hi nibble */
 786                 if (phy->sas_phy.role == PHY_ROLE_INITIATOR)
 787                         control_phy->port_type = SAS_PROTOCOL_ALL << 4;
 788                 else if (phy->sas_phy.role == PHY_ROLE_TARGET)
 789                         control_phy->port_type = SAS_PROTOCOL_ALL;
 790                 else
 791                         control_phy->port_type =
 792                                 (SAS_PROTOCOL_ALL << 4) | SAS_PROTOCOL_ALL;
 793
 794                 /* link reset retries, this should be nominal */
 795                 control_phy->link_reset_retries = 10;
 796                 fallthrough;
 797
 798         case RELEASE_SPINUP_HOLD: /* 0x02 */
 799                 /* decide the func_mask */
 800                 control_phy->func_mask = FUNCTION_MASK_DEFAULT;
 801                 if (phy->phy_desc->flags & ASD_SATA_SPINUP_HOLD)
 802                         control_phy->func_mask &= ~SPINUP_HOLD_DIS;
 803                 else
 804                         control_phy->func_mask |= SPINUP_HOLD_DIS;
 805         }
 806
 807         control_phy->conn_handle = cpu_to_le16(0xFFFF);
 808
 809         ascb->tasklet_complete = control_phy_tasklet_complete;
 810 }
 811
 812 /* ---------- INITIATE LINK ADM TASK ---------- */
 813
 814 #if 0
 815
 816 static void link_adm_tasklet_complete(struct asd_ascb *ascb,
 817                                       struct done_list_struct *dl)
 818 {
 819         u8 opcode = dl->opcode;
 820         struct initiate_link_adm *link_adm = &ascb->scb->link_adm;
 821         u8 phy_id = link_adm->phy_id;
 822
 823         if (opcode != TC_NO_ERROR) {
 824                 asd_printk("phy%d: link adm task 0x%x completed with error "
 825                            "0x%x\n", phy_id, link_adm->sub_func, opcode);
 826         }
 827         ASD_DPRINTK("phy%d: link adm task 0x%x: 0x%x\n",
 828                     phy_id, link_adm->sub_func, opcode);
 829
 830         asd_ascb_free(ascb);
 831 }
 832
 833 void asd_build_initiate_link_adm_task(struct asd_ascb *ascb, int phy_id,
 834                                       u8 subfunc)
 835 {
 836         struct scb *scb = ascb->scb;
 837         struct initiate_link_adm *link_adm = &scb->link_adm;
 838
 839         scb->header.opcode = INITIATE_LINK_ADM_TASK;
 840
 841         link_adm->phy_id = phy_id;
 842         link_adm->sub_func = subfunc;
 843         link_adm->conn_handle = cpu_to_le16(0xFFFF);
 844
 845         ascb->tasklet_complete = link_adm_tasklet_complete;
 846 }
 847
 848 #endif  /*  0  */
 849
 850 /* ---------- SCB timer ---------- */
 851
 852 /**
 853  * asd_ascb_timedout -- called when a pending SCB's timer has expired
 854  * @t: Timer context used to fetch the SCB
 855  *
 856  * This is the default timeout function which does the most necessary.
 857  * Upper layers can implement their own timeout function, say to free
 858  * resources they have with this SCB, and then call this one at the
 859  * end of their timeout function.  To do this, one should initialize
 860  * the ascb->timer.{function, expires} prior to calling the post
 861  * function. The timer is started by the post function.
 862  */
 863 void asd_ascb_timedout(struct timer_list *t)
 864 {
 865         struct asd_ascb *ascb = from_timer(ascb, t, timer);
 866         struct asd_seq_data *seq = &ascb->ha->seq;
 867         unsigned long flags;
 868
 869         ASD_DPRINTK("scb:0x%x timed out\n", ascb->scb->header.opcode);
 870
 871         spin_lock_irqsave(&seq->pend_q_lock, flags);
 872         seq->pending--;
 873         list_del_init(&ascb->list);
 874         spin_unlock_irqrestore(&seq->pend_q_lock, flags);
 875
 876         asd_ascb_free(ascb);
 877 }
 878
 879 /* ---------- CONTROL PHY ---------- */
 880
 881 /* Given the spec value, return a driver value. */
 882 static const int phy_func_table[] = {
 883         [PHY_FUNC_NOP]        = PHY_NO_OP,
 884         [PHY_FUNC_LINK_RESET] = ENABLE_PHY,
 885         [PHY_FUNC_HARD_RESET] = EXECUTE_HARD_RESET,
 886         [PHY_FUNC_DISABLE]    = DISABLE_PHY,
 887         [PHY_FUNC_RELEASE_SPINUP_HOLD] = RELEASE_SPINUP_HOLD,
 888 };
 889
 890 int asd_control_phy(struct asd_sas_phy *phy, enum phy_func func, void *arg)
 891 {
 892         struct asd_ha_struct *asd_ha = phy->ha->lldd_ha;
 893         struct asd_phy_desc *pd = asd_ha->phys[phy->id].phy_desc;
 894         struct asd_ascb *ascb;
 895         struct sas_phy_linkrates *rates;
 896         int res = 1;
 897
 898         switch (func) {
 899         case PHY_FUNC_CLEAR_ERROR_LOG:
 900         case PHY_FUNC_GET_EVENTS:
 901                 return -ENOSYS;
 902         case PHY_FUNC_SET_LINK_RATE:
 903                 rates = arg;
 904                 if (rates->minimum_linkrate) {
 905                         pd->min_sas_lrate = rates->minimum_linkrate;
 906                         pd->min_sata_lrate = rates->minimum_linkrate;
 907                 }
 908                 if (rates->maximum_linkrate) {
 909                         pd->max_sas_lrate = rates->maximum_linkrate;
 910                         pd->max_sata_lrate = rates->maximum_linkrate;
 911                 }
 912                 func = PHY_FUNC_LINK_RESET;
 913                 break;
 914         default:
 915                 break;
 916         }
 917
 918         ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL);
 919         if (!ascb)
 920                 return -ENOMEM;
 921
 922         asd_build_control_phy(ascb, phy->id, phy_func_table[func]);
 923         res = asd_post_ascb_list(asd_ha, ascb , 1);
 924         if (res)
 925                 asd_ascb_free(ascb);
 926
 927         return res;
 928 }