release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/scsi/aic94xx/aic94xx_dev.c

   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
  38 static 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);
  51 out:
  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
  74 static 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
  82 static 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 == 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
  95 static 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
 112 static int asd_init_sata(struct domain_device *dev)
 113 {
 114         struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
 115         int ddb = (int) (unsigned long) dev->lldd_dev;
 116         u32 qdepth = 0;
 117         int res = 0;
 118
 119         asd_ddbsite_write_word(asd_ha, ddb, ATA_CMD_SCBPTR, 0xFFFF);
 120         if ((dev->dev_type == SATA_DEV || dev->dev_type == SATA_PM_PORT) &&
 121             dev->sata_dev.identify_device &&
 122             dev->sata_dev.identify_device[10] != 0) {
 123                 u16 w75 = le16_to_cpu(dev->sata_dev.identify_device[75]);
 124                 u16 w76 = le16_to_cpu(dev->sata_dev.identify_device[76]);
 125
 126                 if (w76 & 0x100) /* NCQ? */
 127                         qdepth = (w75 & 0x1F) + 1;
 128                 asd_ddbsite_write_dword(asd_ha, ddb, SATA_TAG_ALLOC_MASK,
 129                                         (1ULL<<qdepth)-1);
 130                 asd_ddbsite_write_byte(asd_ha, ddb, NUM_SATA_TAGS, qdepth);
 131         }
 132         if (dev->dev_type == SATA_DEV || dev->dev_type == SATA_PM ||
 133             dev->dev_type == SATA_PM_PORT) {
 134                 struct dev_to_host_fis *fis = (struct dev_to_host_fis *)
 135                         dev->frame_rcvd;
 136                 asd_ddbsite_write_byte(asd_ha, ddb, SATA_STATUS, fis->status);
 137         }
 138         asd_ddbsite_write_word(asd_ha, ddb, NCQ_DATA_SCB_PTR, 0xFFFF);
 139         if (qdepth > 0)
 140                 res = asd_init_sata_tag_ddb(dev);
 141         return res;
 142 }
 143
 144 static int asd_init_target_ddb(struct domain_device *dev)
 145 {
 146         int ddb, i;
 147         struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
 148         u8 flags = 0;
 149
 150         ddb = asd_get_ddb(asd_ha);
 151         if (ddb < 0)
 152                 return ddb;
 153
 154         dev->lldd_dev = (void *) (unsigned long) ddb;
 155
 156         asd_ddbsite_write_byte(asd_ha, ddb, 0, DDB_TP_CONN_TYPE);
 157         asd_ddbsite_write_byte(asd_ha, ddb, 1, 0);
 158         asd_ddbsite_write_word(asd_ha, ddb, INIT_CONN_TAG, 0xFFFF);
 159         for (i = 0; i < SAS_ADDR_SIZE; i++)
 160                 asd_ddbsite_write_byte(asd_ha, ddb, DEST_SAS_ADDR+i,
 161                                        dev->sas_addr[i]);
 162         asd_ddbsite_write_word(asd_ha, ddb, SEND_QUEUE_HEAD, 0xFFFF);
 163         asd_set_ddb_type(dev);
 164         asd_ddbsite_write_byte(asd_ha, ddb, CONN_MASK, dev->port->phy_mask);
 165         if (dev->port->oob_mode != SATA_OOB_MODE) {
 166                 flags |= OPEN_REQUIRED;
 167                 if ((dev->dev_type == SATA_DEV) ||
 168                     (dev->tproto & SAS_PROTOCOL_STP)) {
 169                         struct smp_resp *rps_resp = &dev->sata_dev.rps_resp;
 170                         if (rps_resp->frame_type == SMP_RESPONSE &&
 171                             rps_resp->function == SMP_REPORT_PHY_SATA &&
 172                             rps_resp->result == SMP_RESP_FUNC_ACC) {
 173                                 if (rps_resp->rps.affil_valid)
 174                                         flags |= STP_AFFIL_POL;
 175                                 if (rps_resp->rps.affil_supp)
 176                                         flags |= SUPPORTS_AFFIL;
 177                         }
 178                 } else {
 179                         flags |= CONCURRENT_CONN_SUPP;
 180                         if (!dev->parent &&
 181                             (dev->dev_type == EDGE_DEV ||
 182                              dev->dev_type == FANOUT_DEV))
 183                                 asd_ddbsite_write_byte(asd_ha, ddb, MAX_CCONN,
 184                                                        4);
 185                         else
 186                                 asd_ddbsite_write_byte(asd_ha, ddb, MAX_CCONN,
 187                                                        dev->pathways);
 188                         asd_ddbsite_write_byte(asd_ha, ddb, NUM_CTX, 1);
 189                 }
 190         }
 191         if (dev->dev_type == SATA_PM)
 192                 flags |= SATA_MULTIPORT;
 193         asd_ddbsite_write_byte(asd_ha, ddb, DDB_TARG_FLAGS, flags);
 194
 195         flags = 0;
 196         if (dev->tproto & SAS_PROTOCOL_STP)
 197                 flags |= STP_CL_POL_NO_TX;
 198         asd_ddbsite_write_byte(asd_ha, ddb, DDB_TARG_FLAGS2, flags);
 199
 200         asd_ddbsite_write_word(asd_ha, ddb, EXEC_QUEUE_TAIL, 0xFFFF);
 201         asd_ddbsite_write_word(asd_ha, ddb, SEND_QUEUE_TAIL, 0xFFFF);
 202         asd_ddbsite_write_word(asd_ha, ddb, SISTER_DDB, 0xFFFF);
 203
 204         if (dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) {
 205                 i = asd_init_sata(dev);
 206                 if (i < 0) {
 207                         asd_free_ddb(asd_ha, ddb);
 208                         return i;
 209                 }
 210         }
 211
 212         if (dev->dev_type == SAS_END_DEV) {
 213                 struct sas_end_device *rdev = rphy_to_end_device(dev->rphy);
 214                 if (rdev->I_T_nexus_loss_timeout > 0)
 215                         asd_ddbsite_write_word(asd_ha, ddb, ITNL_TIMEOUT,
 216                                                min(rdev->I_T_nexus_loss_timeout,
 217                                                    (u16)ITNL_TIMEOUT_CONST));
 218                 else
 219                         asd_ddbsite_write_word(asd_ha, ddb, ITNL_TIMEOUT,
 220                                                (u16)ITNL_TIMEOUT_CONST);
 221         }
 222         return 0;
 223 }
 224
 225 static int asd_init_sata_pm_table_ddb(struct domain_device *dev)
 226 {
 227         struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
 228         int ddb, i;
 229
 230         ddb = asd_get_ddb(asd_ha);
 231         if (ddb < 0)
 232                 return ddb;
 233
 234         for (i = 0; i < 32; i += 2)
 235                 asd_ddbsite_write_word(asd_ha, ddb, i, 0xFFFF);
 236
 237         asd_ddbsite_write_word(asd_ha, (int) (unsigned long) dev->lldd_dev,
 238                                SISTER_DDB, ddb);
 239
 240         return 0;
 241 }
 242
 243 #define PM_PORT_FLAGS offsetof(struct asd_ddb_sata_pm_port, pm_port_flags)
 244 #define PARENT_DDB    offsetof(struct asd_ddb_sata_pm_port, parent_ddb)
 245
 246 /**
 247  * asd_init_sata_pm_port_ddb -- SATA Port Multiplier Port
 248  * dev: pointer to domain device
 249  *
 250  * For SATA Port Multiplier Ports we need to allocate one SATA Port
 251  * Multiplier Port DDB and depending on whether the target on it
 252  * supports SATA II NCQ, one SATA Tag DDB.
 253  */
 254 static int asd_init_sata_pm_port_ddb(struct domain_device *dev)
 255 {
 256         int ddb, i, parent_ddb, pmtable_ddb;
 257         struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
 258         u8  flags;
 259
 260         ddb = asd_get_ddb(asd_ha);
 261         if (ddb < 0)
 262                 return ddb;
 263
 264         asd_set_ddb_type(dev);
 265         flags = (dev->sata_dev.port_no << 4) | PM_PORT_SET;
 266         asd_ddbsite_write_byte(asd_ha, ddb, PM_PORT_FLAGS, flags);
 267         asd_ddbsite_write_word(asd_ha, ddb, SISTER_DDB, 0xFFFF);
 268         asd_ddbsite_write_word(asd_ha, ddb, ATA_CMD_SCBPTR, 0xFFFF);
 269         asd_init_sata(dev);
 270
 271         parent_ddb = (int) (unsigned long) dev->parent->lldd_dev;
 272         asd_ddbsite_write_word(asd_ha, ddb, PARENT_DDB, parent_ddb);
 273         pmtable_ddb = asd_ddbsite_read_word(asd_ha, parent_ddb, SISTER_DDB);
 274         asd_ddbsite_write_word(asd_ha, pmtable_ddb, dev->sata_dev.port_no,ddb);
 275
 276         if (asd_ddbsite_read_byte(asd_ha, ddb, NUM_SATA_TAGS) > 0) {
 277                 i = asd_init_sata_tag_ddb(dev);
 278                 if (i < 0) {
 279                         asd_free_ddb(asd_ha, ddb);
 280                         return i;
 281                 }
 282         }
 283         return 0;
 284 }
 285
 286 static int asd_init_initiator_ddb(struct domain_device *dev)
 287 {
 288         return -ENODEV;
 289 }
 290
 291 /**
 292  * asd_init_sata_pm_ddb -- SATA Port Multiplier
 293  * dev: pointer to domain device
 294  *
 295  * For STP and direct-attached SATA Port Multipliers we need
 296  * one target port DDB entry and one SATA PM table DDB entry.
 297  */
 298 static int asd_init_sata_pm_ddb(struct domain_device *dev)
 299 {
 300         int res = 0;
 301
 302         res = asd_init_target_ddb(dev);
 303         if (res)
 304                 goto out;
 305         res = asd_init_sata_pm_table_ddb(dev);
 306         if (res)
 307                 asd_free_ddb(dev->port->ha->lldd_ha,
 308                              (int) (unsigned long) dev->lldd_dev);
 309 out:
 310         return res;
 311 }
 312
 313 int asd_dev_found(struct domain_device *dev)
 314 {
 315         unsigned long flags;
 316         int res = 0;
 317         struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
 318
 319         spin_lock_irqsave(&asd_ha->hw_prof.ddb_lock, flags);
 320         switch (dev->dev_type) {
 321         case SATA_PM:
 322                 res = asd_init_sata_pm_ddb(dev);
 323                 break;
 324         case SATA_PM_PORT:
 325                 res = asd_init_sata_pm_port_ddb(dev);
 326                 break;
 327         default:
 328                 if (dev->tproto)
 329                         res = asd_init_target_ddb(dev);
 330                 else
 331                         res = asd_init_initiator_ddb(dev);
 332         }
 333         spin_unlock_irqrestore(&asd_ha->hw_prof.ddb_lock, flags);
 334
 335         return res;
 336 }
 337
 338 void asd_dev_gone(struct domain_device *dev)
 339 {
 340         int ddb, sister_ddb;
 341         unsigned long flags;
 342         struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
 343
 344         spin_lock_irqsave(&asd_ha->hw_prof.ddb_lock, flags);
 345         ddb = (int) (unsigned long) dev->lldd_dev;
 346         sister_ddb = asd_ddbsite_read_word(asd_ha, ddb, SISTER_DDB);
 347
 348         if (sister_ddb != 0xFFFF)
 349                 asd_free_ddb(asd_ha, sister_ddb);
 350         asd_free_ddb(asd_ha, ddb);
 351         dev->lldd_dev = NULL;
 352         spin_unlock_irqrestore(&asd_ha->hw_prof.ddb_lock, flags);
 353 }