LXR linux/drivers/scsi/aic94xx/aic94xx

   1/*
   2 * Aic94xx SAS/SATA DDB 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 * $Id: //depot/aic94xx/aic94xx_dev.c#21 $
  26 */
  27
  28#include "aic94xx.h"
  29#include "aic94xx_hwi.h"
  30#include "aic94xx_reg.h"
  31#include "aic94xx_sas.h"
  32
  33#define FIND_FREE_DDB(_ha) find_first_zero_bit((_ha)->hw_prof.ddb_bitmap, \
  34                                               (_ha)->hw_prof.max_ddbs)
  35#define SET_DDB(_ddb, _ha) set_bit(_ddb, (_ha)->hw_prof.ddb_bitmap)
  36#define CLEAR_DDB(_ddb, _ha) clear_bit(_ddb, (_ha)->hw_prof.ddb_bitmap)
  37
  38static int asd_get_ddb(struct asd_ha_struct *asd_ha)
  39{
  40        int ddb, i;
  41
  42        ddb = FIND_FREE_DDB(asd_ha);
  43        if (ddb >= asd_ha->hw_prof.max_ddbs) {
  44                ddb = -ENOMEM;
  45                goto out;
  46        }
  47        SET_DDB(ddb, asd_ha);
  48
  49        for (i = 0; i < sizeof(struct asd_ddb_ssp_smp_target_port); i+= 4)
  50                asd_ddbsite_write_dword(asd_ha, ddb, i, 0);
  51out:
  52        return ddb;
  53}
  54
  55#define INIT_CONN_TAG   offsetof(struct asd_ddb_ssp_smp_target_port, init_conn_tag)
  56#define DEST_SAS_ADDR   offsetof(struct asd_ddb_ssp_smp_target_port, dest_sas_addr)
  57#define SEND_QUEUE_HEAD offsetof(struct asd_ddb_ssp_smp_target_port, send_queue_head)
  58#define DDB_TYPE        offsetof(struct asd_ddb_ssp_smp_target_port, ddb_type)
  59#define CONN_MASK       offsetof(struct asd_ddb_ssp_smp_target_port, conn_mask)
  60#define DDB_TARG_FLAGS  offsetof(struct asd_ddb_ssp_smp_target_port, flags)
  61#define DDB_TARG_FLAGS2 offsetof(struct asd_ddb_stp_sata_target_port, flags2)
  62#define EXEC_QUEUE_TAIL offsetof(struct asd_ddb_ssp_smp_target_port, exec_queue_tail)
  63#define SEND_QUEUE_TAIL offsetof(struct asd_ddb_ssp_smp_target_port, send_queue_tail)
  64#define SISTER_DDB      offsetof(struct asd_ddb_ssp_smp_target_port, sister_ddb)
  65#define MAX_CCONN       offsetof(struct asd_ddb_ssp_smp_target_port, max_concurrent_conn)
  66#define NUM_CTX         offsetof(struct asd_ddb_ssp_smp_target_port, num_contexts)
  67#define ATA_CMD_SCBPTR  offsetof(struct asd_ddb_stp_sata_target_port, ata_cmd_scbptr)
  68#define SATA_TAG_ALLOC_MASK offsetof(struct asd_ddb_stp_sata_target_port, sata_tag_alloc_mask)
  69#define NUM_SATA_TAGS   offsetof(struct asd_ddb_stp_sata_target_port, num_sata_tags)
  70#define SATA_STATUS     offsetof(struct asd_ddb_stp_sata_target_port, sata_status)
  71#define NCQ_DATA_SCB_PTR offsetof(struct asd_ddb_stp_sata_target_port, ncq_data_scb_ptr)
  72#define ITNL_TIMEOUT    offsetof(struct asd_ddb_ssp_smp_target_port, itnl_timeout)
  73
  74static void asd_free_ddb(struct asd_ha_struct *asd_ha, int ddb)
  75{
  76        if (!ddb || ddb >= 0xFFFF)
  77                return;
  78        asd_ddbsite_write_byte(asd_ha, ddb, DDB_TYPE, DDB_TYPE_UNUSED);
  79        CLEAR_DDB(ddb, asd_ha);
  80}
  81
  82static void asd_set_ddb_type(struct domain_device *dev)
  83{
  84        struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
  85        int ddb = (int) (unsigned long) dev->lldd_dev;
  86
  87        if (dev->dev_type == SAS_SATA_PM_PORT)
  88                asd_ddbsite_write_byte(asd_ha,ddb, DDB_TYPE, DDB_TYPE_PM_PORT);
  89        else if (dev->tproto)
  90                asd_ddbsite_write_byte(asd_ha,ddb, DDB_TYPE, DDB_TYPE_TARGET);
  91        else
  92                asd_ddbsite_write_byte(asd_ha,ddb,DDB_TYPE,DDB_TYPE_INITIATOR);
  93}
  94
  95static int asd_init_sata_tag_ddb(struct domain_device *dev)
  96{
  97        struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
  98        int ddb, i;
  99
 100        ddb = asd_get_ddb(asd_ha);
 101        if (ddb < 0)
 102                return ddb;
 103
 104        for (i = 0; i < sizeof(struct asd_ddb_sata_tag); i += 2)
 105                asd_ddbsite_write_word(asd_ha, ddb, i, 0xFFFF);
 106
 107        asd_ddbsite_write_word(asd_ha, (int) (unsigned long) dev->lldd_dev,
 108                               SISTER_DDB, ddb);
 109        return 0;
 110}
 111
 112void asd_set_dmamode(struct domain_device *dev)
 113{
 114        struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
 115        struct ata_device *ata_dev = sas_to_ata_dev(dev);
 116        int ddb = (int) (unsigned long) dev->lldd_dev;
 117        u32 qdepth = 0;
 118
 119        if (dev->dev_type == SAS_SATA_DEV || dev->dev_type == SAS_SATA_PM_PORT) {
 120                if (ata_id_has_ncq(ata_dev->id))
 121                        qdepth = ata_id_queue_depth(ata_dev->id);
 122                asd_ddbsite_write_dword(asd_ha, ddb, SATA_TAG_ALLOC_MASK,
 123                                        (1ULL<<qdepth)-1);
 124                asd_ddbsite_write_byte(asd_ha, ddb, NUM_SATA_TAGS, qdepth);
 125        }
 126
 127        if (qdepth > 0)
 128                if (asd_init_sata_tag_ddb(dev) != 0) {
 129                        unsigned long flags;
 130
 131                        spin_lock_irqsave(dev->sata_dev.ap->lock, flags);
 132                        ata_dev->flags |= ATA_DFLAG_NCQ_OFF;
 133                        spin_unlock_irqrestore(dev->sata_dev.ap->lock, flags);
 134                }
 135}
 136
 137static int asd_init_sata(struct domain_device *dev)
 138{
 139        struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
 140        int ddb = (int) (unsigned long) dev->lldd_dev;
 141
 142        asd_ddbsite_write_word(asd_ha, ddb, ATA_CMD_SCBPTR, 0xFFFF);
 143        if (dev->dev_type == SAS_SATA_DEV || dev->dev_type == SAS_SATA_PM ||
 144            dev->dev_type == SAS_SATA_PM_PORT) {
 145                struct dev_to_host_fis *fis = (struct dev_to_host_fis *)
 146                        dev->frame_rcvd;
 147                asd_ddbsite_write_byte(asd_ha, ddb, SATA_STATUS, fis->status);
 148        }
 149        asd_ddbsite_write_word(asd_ha, ddb, NCQ_DATA_SCB_PTR, 0xFFFF);
 150
 151        return 0;
 152}
 153
 154static int asd_init_target_ddb(struct domain_device *dev)
 155{
 156        int ddb, i;
 157        struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
 158        u8 flags = 0;
 159
 160        ddb = asd_get_ddb(asd_ha);
 161        if (ddb < 0)
 162                return ddb;
 163
 164        dev->lldd_dev = (void *) (unsigned long) ddb;
 165
 166        asd_ddbsite_write_byte(asd_ha, ddb, 0, DDB_TP_CONN_TYPE);
 167        asd_ddbsite_write_byte(asd_ha, ddb, 1, 0);
 168        asd_ddbsite_write_word(asd_ha, ddb, INIT_CONN_TAG, 0xFFFF);
 169        for (i = 0; i < SAS_ADDR_SIZE; i++)
 170                asd_ddbsite_write_byte(asd_ha, ddb, DEST_SAS_ADDR+i,
 171                                       dev->sas_addr[i]);
 172        asd_ddbsite_write_word(asd_ha, ddb, SEND_QUEUE_HEAD, 0xFFFF);
 173        asd_set_ddb_type(dev);
 174        asd_ddbsite_write_byte(asd_ha, ddb, CONN_MASK, dev->port->phy_mask);
 175        if (dev->port->oob_mode != SATA_OOB_MODE) {
 176                flags |= OPEN_REQUIRED;
 177                if ((dev->dev_type == SAS_SATA_DEV) ||
 178                    (dev->tproto & SAS_PROTOCOL_STP)) {
 179                        struct smp_resp *rps_resp = &dev->sata_dev.rps_resp;
 180                        if (rps_resp->frame_type == SMP_RESPONSE &&
 181                            rps_resp->function == SMP_REPORT_PHY_SATA &&
 182                            rps_resp->result == SMP_RESP_FUNC_ACC) {
 183                                if (rps_resp->rps.affil_valid)
 184                                        flags |= STP_AFFIL_POL;
 185                                if (rps_resp->rps.affil_supp)
 186                                        flags |= SUPPORTS_AFFIL;
 187                        }
 188                } else {
 189                        flags |= CONCURRENT_CONN_SUPP;
 190                        if (!dev->parent &&
 191                            (dev->dev_type == SAS_EDGE_EXPANDER_DEVICE ||
 192                             dev->dev_type == SAS_FANOUT_EXPANDER_DEVICE))
 193                                asd_ddbsite_write_byte(asd_ha, ddb, MAX_CCONN,
 194                                                       4);
 195                        else
 196                                asd_ddbsite_write_byte(asd_ha, ddb, MAX_CCONN,
 197                                                       dev->pathways);
 198                        asd_ddbsite_write_byte(asd_ha, ddb, NUM_CTX, 1);
 199                }
 200        }
 201        if (dev->dev_type == SAS_SATA_PM)
 202                flags |= SATA_MULTIPORT;
 203        asd_ddbsite_write_byte(asd_ha, ddb, DDB_TARG_FLAGS, flags);
 204
 205        flags = 0;
 206        if (dev->tproto & SAS_PROTOCOL_STP)
 207                flags |= STP_CL_POL_NO_TX;
 208        asd_ddbsite_write_byte(asd_ha, ddb, DDB_TARG_FLAGS2, flags);
 209
 210        asd_ddbsite_write_word(asd_ha, ddb, EXEC_QUEUE_TAIL, 0xFFFF);
 211        asd_ddbsite_write_word(asd_ha, ddb, SEND_QUEUE_TAIL, 0xFFFF);
 212        asd_ddbsite_write_word(asd_ha, ddb, SISTER_DDB, 0xFFFF);
 213
 214        if (dev->dev_type == SAS_SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) {
 215                i = asd_init_sata(dev);
 216                if (i < 0) {
 217                        asd_free_ddb(asd_ha, ddb);
 218                        return i;
 219                }
 220        }
 221
 222        if (dev->dev_type == SAS_END_DEVICE) {
 223                struct sas_end_device *rdev = rphy_to_end_device(dev->rphy);
 224                if (rdev->I_T_nexus_loss_timeout > 0)
 225                        asd_ddbsite_write_word(asd_ha, ddb, ITNL_TIMEOUT,
 226                                               min(rdev->I_T_nexus_loss_timeout,
 227                                                   (u16)ITNL_TIMEOUT_CONST));
 228                else
 229                        asd_ddbsite_write_word(asd_ha, ddb, ITNL_TIMEOUT,
 230                                               (u16)ITNL_TIMEOUT_CONST);
 231        }
 232        return 0;
 233}
 234
 235static int asd_init_sata_pm_table_ddb(struct domain_device *dev)
 236{
 237        struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
 238        int ddb, i;
 239
 240        ddb = asd_get_ddb(asd_ha);
 241        if (ddb < 0)
 242                return ddb;
 243
 244        for (i = 0; i < 32; i += 2)
 245                asd_ddbsite_write_word(asd_ha, ddb, i, 0xFFFF);
 246
 247        asd_ddbsite_write_word(asd_ha, (int) (unsigned long) dev->lldd_dev,
 248                               SISTER_DDB, ddb);
 249
 250        return 0;
 251}
 252
 253#define PM_PORT_FLAGS offsetof(struct asd_ddb_sata_pm_port, pm_port_flags)
 254#define PARENT_DDB    offsetof(struct asd_ddb_sata_pm_port, parent_ddb)
 255
 256/**
 257 * asd_init_sata_pm_port_ddb -- SATA Port Multiplier Port
 258 * dev: pointer to domain device
 259 *
 260 * For SATA Port Multiplier Ports we need to allocate one SATA Port
 261 * Multiplier Port DDB and depending on whether the target on it
 262 * supports SATA II NCQ, one SATA Tag DDB.
 263 */
 264static int asd_init_sata_pm_port_ddb(struct domain_device *dev)
 265{
 266        int ddb, i, parent_ddb, pmtable_ddb;
 267        struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
 268        u8  flags;
 269
 270        ddb = asd_get_ddb(asd_ha);
 271        if (ddb < 0)
 272                return ddb;
 273
 274        asd_set_ddb_type(dev);
 275        flags = (dev->sata_dev.port_no << 4) | PM_PORT_SET;
 276        asd_ddbsite_write_byte(asd_ha, ddb, PM_PORT_FLAGS, flags);
 277        asd_ddbsite_write_word(asd_ha, ddb, SISTER_DDB, 0xFFFF);
 278        asd_ddbsite_write_word(asd_ha, ddb, ATA_CMD_SCBPTR, 0xFFFF);
 279        asd_init_sata(dev);
 280
 281        parent_ddb = (int) (unsigned long) dev->parent->lldd_dev;
 282        asd_ddbsite_write_word(asd_ha, ddb, PARENT_DDB, parent_ddb);
 283        pmtable_ddb = asd_ddbsite_read_word(asd_ha, parent_ddb, SISTER_DDB);
 284        asd_ddbsite_write_word(asd_ha, pmtable_ddb, dev->sata_dev.port_no,ddb);
 285
 286        if (asd_ddbsite_read_byte(asd_ha, ddb, NUM_SATA_TAGS) > 0) {
 287                i = asd_init_sata_tag_ddb(dev);
 288                if (i < 0) {
 289                        asd_free_ddb(asd_ha, ddb);
 290                        return i;
 291                }
 292        }
 293        return 0;
 294}
 295
 296static int asd_init_initiator_ddb(struct domain_device *dev)
 297{
 298        return -ENODEV;
 299}
 300
 301/**
 302 * asd_init_sata_pm_ddb -- SATA Port Multiplier
 303 * dev: pointer to domain device
 304 *
 305 * For STP and direct-attached SATA Port Multipliers we need
 306 * one target port DDB entry and one SATA PM table DDB entry.
 307 */
 308static int asd_init_sata_pm_ddb(struct domain_device *dev)
 309{
 310        int res = 0;
 311
 312        res = asd_init_target_ddb(dev);
 313        if (res)
 314                goto out;
 315        res = asd_init_sata_pm_table_ddb(dev);
 316        if (res)
 317                asd_free_ddb(dev->port->ha->lldd_ha,
 318                             (int) (unsigned long) dev->lldd_dev);
 319out:
 320        return res;
 321}
 322
 323int asd_dev_found(struct domain_device *dev)
 324{
 325        unsigned long flags;
 326        int res = 0;
 327        struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
 328
 329        spin_lock_irqsave(&asd_ha->hw_prof.ddb_lock, flags);
 330        switch (dev->dev_type) {
 331        case SAS_SATA_PM:
 332                res = asd_init_sata_pm_ddb(dev);
 333                break;
 334        case SAS_SATA_PM_PORT:
 335                res = asd_init_sata_pm_port_ddb(dev);
 336                break;
 337        default:
 338                if (dev->tproto)
 339                        res = asd_init_target_ddb(dev);
 340                else
 341                        res = asd_init_initiator_ddb(dev);
 342        }
 343        spin_unlock_irqrestore(&asd_ha->hw_prof.ddb_lock, flags);
 344
 345        return res;
 346}
 347
 348void asd_dev_gone(struct domain_device *dev)
 349{
 350        int ddb, sister_ddb;
 351        unsigned long flags;
 352        struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
 353
 354        spin_lock_irqsave(&asd_ha->hw_prof.ddb_lock, flags);
 355        ddb = (int) (unsigned long) dev->lldd_dev;
 356        sister_ddb = asd_ddbsite_read_word(asd_ha, ddb, SISTER_DDB);
 357
 358        if (sister_ddb != 0xFFFF)
 359                asd_free_ddb(asd_ha, sister_ddb);
 360        asd_free_ddb(asd_ha, ddb);
 361        dev->lldd_dev = NULL;
 362        spin_unlock_irqrestore(&asd_ha->hw_prof.ddb_lock, flags);
 363}
 364