Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Support for SATA devices on Serial Attached SCSI (SAS) controllers |
| 3 | * |
| 4 | * Copyright (C) 2006 IBM Corporation |
| 5 | * |
| 6 | * Written by: Darrick J. Wong <djwong@us.ibm.com>, IBM Corporation |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public License as |
| 10 | * published by the Free Software Foundation; either version 2 of the |
| 11 | * License, or (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, but |
| 14 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | * General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
| 21 | * USA |
| 22 | */ |
| 23 | |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 24 | #include <linux/scatterlist.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 25 | #include <linux/slab.h> |
Dan Williams | 50824d6 | 2011-12-04 01:06:24 -0800 | [diff] [blame] | 26 | #include <linux/async.h> |
Dan Williams | 43a5ab1 | 2011-12-08 23:20:44 -0800 | [diff] [blame] | 27 | #include <linux/export.h> |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 28 | |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 29 | #include <scsi/sas_ata.h> |
| 30 | #include "sas_internal.h" |
| 31 | #include <scsi/scsi_host.h> |
| 32 | #include <scsi/scsi_device.h> |
| 33 | #include <scsi/scsi_tcq.h> |
| 34 | #include <scsi/scsi.h> |
| 35 | #include <scsi/scsi_transport.h> |
| 36 | #include <scsi/scsi_transport_sas.h> |
| 37 | #include "../scsi_sas_internal.h" |
Darrick J. Wong | 3a2755a | 2007-01-30 01:18:58 -0800 | [diff] [blame] | 38 | #include "../scsi_transport_api.h" |
| 39 | #include <scsi/scsi_eh.h> |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 40 | |
| 41 | static enum ata_completion_errors sas_to_ata_err(struct task_status_struct *ts) |
| 42 | { |
| 43 | /* Cheesy attempt to translate SAS errors into ATA. Hah! */ |
| 44 | |
| 45 | /* transport error */ |
| 46 | if (ts->resp == SAS_TASK_UNDELIVERED) |
| 47 | return AC_ERR_ATA_BUS; |
| 48 | |
| 49 | /* ts->resp == SAS_TASK_COMPLETE */ |
| 50 | /* task delivered, what happened afterwards? */ |
| 51 | switch (ts->stat) { |
| 52 | case SAS_DEV_NO_RESPONSE: |
| 53 | return AC_ERR_TIMEOUT; |
| 54 | |
| 55 | case SAS_INTERRUPTED: |
| 56 | case SAS_PHY_DOWN: |
| 57 | case SAS_NAK_R_ERR: |
| 58 | return AC_ERR_ATA_BUS; |
| 59 | |
| 60 | |
| 61 | case SAS_DATA_UNDERRUN: |
| 62 | /* |
| 63 | * Some programs that use the taskfile interface |
| 64 | * (smartctl in particular) can cause underrun |
| 65 | * problems. Ignore these errors, perhaps at our |
| 66 | * peril. |
| 67 | */ |
| 68 | return 0; |
| 69 | |
| 70 | case SAS_DATA_OVERRUN: |
| 71 | case SAS_QUEUE_FULL: |
| 72 | case SAS_DEVICE_UNKNOWN: |
| 73 | case SAS_SG_ERR: |
| 74 | return AC_ERR_INVALID; |
| 75 | |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 76 | case SAS_OPEN_TO: |
| 77 | case SAS_OPEN_REJECT: |
| 78 | SAS_DPRINTK("%s: Saw error %d. What to do?\n", |
Harvey Harrison | cadbd4a | 2008-07-03 23:47:27 -0700 | [diff] [blame] | 79 | __func__, ts->stat); |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 80 | return AC_ERR_OTHER; |
| 81 | |
James Bottomley | 75c0b38 | 2011-01-23 08:16:24 -0600 | [diff] [blame] | 82 | case SAM_STAT_CHECK_CONDITION: |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 83 | case SAS_ABORTED_TASK: |
| 84 | return AC_ERR_DEV; |
| 85 | |
| 86 | case SAS_PROTO_RESPONSE: |
| 87 | /* This means the ending_fis has the error |
| 88 | * value; return 0 here to collect it */ |
| 89 | return 0; |
| 90 | default: |
| 91 | return 0; |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | static void sas_ata_task_done(struct sas_task *task) |
| 96 | { |
| 97 | struct ata_queued_cmd *qc = task->uldd_task; |
Dan Williams | 9095a64 | 2011-11-28 11:29:20 -0800 | [diff] [blame] | 98 | struct domain_device *dev = task->dev; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 99 | struct task_status_struct *stat = &task->task_status; |
| 100 | struct ata_task_resp *resp = (struct ata_task_resp *)stat->buf; |
Dan Williams | 9095a64 | 2011-11-28 11:29:20 -0800 | [diff] [blame] | 101 | struct sas_ha_struct *sas_ha = dev->port->ha; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 102 | enum ata_completion_errors ac; |
Darrick J. Wong | 3eb7a51 | 2007-01-30 01:18:35 -0800 | [diff] [blame] | 103 | unsigned long flags; |
Xiangliang Yu | bb650a1 | 2011-05-08 19:27:01 +0800 | [diff] [blame] | 104 | struct ata_link *link; |
Dan Williams | 3dff572 | 2011-11-28 12:08:22 -0800 | [diff] [blame] | 105 | struct ata_port *ap; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 106 | |
Dan Williams | 9095a64 | 2011-11-28 11:29:20 -0800 | [diff] [blame] | 107 | spin_lock_irqsave(&dev->done_lock, flags); |
| 108 | if (test_bit(SAS_HA_FROZEN, &sas_ha->state)) |
| 109 | task = NULL; |
| 110 | else if (qc && qc->scsicmd) |
| 111 | ASSIGN_SAS_TASK(qc->scsicmd, NULL); |
| 112 | spin_unlock_irqrestore(&dev->done_lock, flags); |
| 113 | |
| 114 | /* check if libsas-eh got to the task before us */ |
| 115 | if (unlikely(!task)) |
| 116 | return; |
| 117 | |
Darrick J. Wong | 1c50dc8 | 2007-01-30 01:18:41 -0800 | [diff] [blame] | 118 | if (!qc) |
| 119 | goto qc_already_gone; |
| 120 | |
Dan Williams | 3dff572 | 2011-11-28 12:08:22 -0800 | [diff] [blame] | 121 | ap = qc->ap; |
Dan Williams | 3dff572 | 2011-11-28 12:08:22 -0800 | [diff] [blame] | 122 | link = &ap->link; |
Darrick J. Wong | 1c50dc8 | 2007-01-30 01:18:41 -0800 | [diff] [blame] | 123 | |
Dan Williams | 3dff572 | 2011-11-28 12:08:22 -0800 | [diff] [blame] | 124 | spin_lock_irqsave(ap->lock, flags); |
| 125 | /* check if we lost the race with libata/sas_ata_post_internal() */ |
| 126 | if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) { |
| 127 | spin_unlock_irqrestore(ap->lock, flags); |
| 128 | if (qc->scsicmd) |
| 129 | goto qc_already_gone; |
| 130 | else { |
| 131 | /* if eh is not involved and the port is frozen then the |
| 132 | * ata internal abort process has taken responsibility |
| 133 | * for this sas_task |
| 134 | */ |
| 135 | return; |
| 136 | } |
| 137 | } |
| 138 | |
James Bottomley | 75c0b38 | 2011-01-23 08:16:24 -0600 | [diff] [blame] | 139 | if (stat->stat == SAS_PROTO_RESPONSE || stat->stat == SAM_STAT_GOOD || |
| 140 | ((stat->stat == SAM_STAT_CHECK_CONDITION && |
| 141 | dev->sata_dev.command_set == ATAPI_COMMAND_SET))) { |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 142 | ata_tf_from_fis(resp->ending_fis, &dev->sata_dev.tf); |
Xiangliang Yu | bb650a1 | 2011-05-08 19:27:01 +0800 | [diff] [blame] | 143 | |
| 144 | if (!link->sactive) { |
| 145 | qc->err_mask |= ac_err_mask(dev->sata_dev.tf.command); |
| 146 | } else { |
| 147 | link->eh_info.err_mask |= ac_err_mask(dev->sata_dev.tf.command); |
| 148 | if (unlikely(link->eh_info.err_mask)) |
| 149 | qc->flags |= ATA_QCFLAG_FAILED; |
| 150 | } |
James Bottomley | 75c0b38 | 2011-01-23 08:16:24 -0600 | [diff] [blame] | 151 | } else { |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 152 | ac = sas_to_ata_err(stat); |
| 153 | if (ac) { |
Harvey Harrison | cadbd4a | 2008-07-03 23:47:27 -0700 | [diff] [blame] | 154 | SAS_DPRINTK("%s: SAS error %x\n", __func__, |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 155 | stat->stat); |
| 156 | /* We saw a SAS error. Send a vague error. */ |
Xiangliang Yu | bb650a1 | 2011-05-08 19:27:01 +0800 | [diff] [blame] | 157 | if (!link->sactive) { |
| 158 | qc->err_mask = ac; |
| 159 | } else { |
| 160 | link->eh_info.err_mask |= AC_ERR_DEV; |
| 161 | qc->flags |= ATA_QCFLAG_FAILED; |
| 162 | } |
| 163 | |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 164 | dev->sata_dev.tf.feature = 0x04; /* status err */ |
| 165 | dev->sata_dev.tf.command = ATA_ERR; |
| 166 | } |
| 167 | } |
| 168 | |
Darrick J. Wong | 1c50dc8 | 2007-01-30 01:18:41 -0800 | [diff] [blame] | 169 | qc->lldd_task = NULL; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 170 | ata_qc_complete(qc); |
Dan Williams | 3dff572 | 2011-11-28 12:08:22 -0800 | [diff] [blame] | 171 | spin_unlock_irqrestore(ap->lock, flags); |
Darrick J. Wong | 3eb7a51 | 2007-01-30 01:18:35 -0800 | [diff] [blame] | 172 | |
Darrick J. Wong | 1c50dc8 | 2007-01-30 01:18:41 -0800 | [diff] [blame] | 173 | qc_already_gone: |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 174 | list_del_init(&task->list); |
| 175 | sas_free_task(task); |
| 176 | } |
| 177 | |
| 178 | static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc) |
| 179 | { |
Dan Williams | 312d3e5 | 2011-11-17 17:59:50 -0800 | [diff] [blame] | 180 | unsigned long flags; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 181 | struct sas_task *task; |
Dan Williams | 312d3e5 | 2011-11-17 17:59:50 -0800 | [diff] [blame] | 182 | struct scatterlist *sg; |
| 183 | int ret = AC_ERR_SYSTEM; |
| 184 | unsigned int si, xfer = 0; |
| 185 | struct ata_port *ap = qc->ap; |
| 186 | struct domain_device *dev = ap->private_data; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 187 | struct sas_ha_struct *sas_ha = dev->port->ha; |
| 188 | struct Scsi_Host *host = sas_ha->core.shost; |
| 189 | struct sas_internal *i = to_sas_internal(host->transportt); |
Dan Williams | 312d3e5 | 2011-11-17 17:59:50 -0800 | [diff] [blame] | 190 | |
| 191 | /* TODO: audit callers to ensure they are ready for qc_issue to |
| 192 | * unconditionally re-enable interrupts |
| 193 | */ |
| 194 | local_irq_save(flags); |
| 195 | spin_unlock(ap->lock); |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 196 | |
Darrick J. Wong | 56dd2c0 | 2010-10-01 13:55:47 -0700 | [diff] [blame] | 197 | /* If the device fell off, no sense in issuing commands */ |
Dan Williams | e139942 | 2012-01-07 08:52:39 +0000 | [diff] [blame] | 198 | if (test_bit(SAS_DEV_GONE, &dev->state)) |
Dan Williams | 312d3e5 | 2011-11-17 17:59:50 -0800 | [diff] [blame] | 199 | goto out; |
Darrick J. Wong | 56dd2c0 | 2010-10-01 13:55:47 -0700 | [diff] [blame] | 200 | |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 201 | task = sas_alloc_task(GFP_ATOMIC); |
| 202 | if (!task) |
Dan Williams | 312d3e5 | 2011-11-17 17:59:50 -0800 | [diff] [blame] | 203 | goto out; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 204 | task->dev = dev; |
| 205 | task->task_proto = SAS_PROTOCOL_STP; |
| 206 | task->task_done = sas_ata_task_done; |
| 207 | |
| 208 | if (qc->tf.command == ATA_CMD_FPDMA_WRITE || |
| 209 | qc->tf.command == ATA_CMD_FPDMA_READ) { |
| 210 | /* Need to zero out the tag libata assigned us */ |
| 211 | qc->tf.nsect = 0; |
| 212 | } |
| 213 | |
James Bottomley | 110dd8f | 2007-07-20 13:11:44 -0500 | [diff] [blame] | 214 | ata_tf_to_fis(&qc->tf, 1, 0, (u8*)&task->ata_task.fis); |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 215 | task->uldd_task = qc; |
Tejun Heo | 405e66b | 2007-11-27 19:28:53 +0900 | [diff] [blame] | 216 | if (ata_is_atapi(qc->tf.protocol)) { |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 217 | memcpy(task->ata_task.atapi_packet, qc->cdb, qc->dev->cdb_len); |
James Bottomley | dde2020 | 2008-02-19 11:36:56 +0100 | [diff] [blame] | 218 | task->total_xfer_len = qc->nbytes; |
| 219 | task->num_scatter = qc->n_elem; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 220 | } else { |
Tejun Heo | ff2aeb1 | 2007-12-05 16:43:11 +0900 | [diff] [blame] | 221 | for_each_sg(qc->sg, sg, qc->n_elem, si) |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 222 | xfer += sg->length; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 223 | |
| 224 | task->total_xfer_len = xfer; |
Tejun Heo | ff2aeb1 | 2007-12-05 16:43:11 +0900 | [diff] [blame] | 225 | task->num_scatter = si; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 226 | } |
| 227 | |
| 228 | task->data_dir = qc->dma_dir; |
Tejun Heo | ff2aeb1 | 2007-12-05 16:43:11 +0900 | [diff] [blame] | 229 | task->scatter = qc->sg; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 230 | task->ata_task.retry_count = 1; |
| 231 | task->task_state_flags = SAS_TASK_STATE_PENDING; |
Darrick J. Wong | 1c50dc8 | 2007-01-30 01:18:41 -0800 | [diff] [blame] | 232 | qc->lldd_task = task; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 233 | |
| 234 | switch (qc->tf.protocol) { |
| 235 | case ATA_PROT_NCQ: |
| 236 | task->ata_task.use_ncq = 1; |
| 237 | /* fall through */ |
Tejun Heo | 0dc3688 | 2007-12-18 16:34:43 -0500 | [diff] [blame] | 238 | case ATAPI_PROT_DMA: |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 239 | case ATA_PROT_DMA: |
| 240 | task->ata_task.dma_xfer = 1; |
| 241 | break; |
| 242 | } |
| 243 | |
Darrick J. Wong | fe059f1 | 2007-01-30 01:18:55 -0800 | [diff] [blame] | 244 | if (qc->scsicmd) |
| 245 | ASSIGN_SAS_TASK(qc->scsicmd, task); |
| 246 | |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 247 | if (sas_ha->lldd_max_execute_num < 2) |
Dan Williams | 312d3e5 | 2011-11-17 17:59:50 -0800 | [diff] [blame] | 248 | ret = i->dft->lldd_execute_task(task, 1, GFP_ATOMIC); |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 249 | else |
Dan Williams | 312d3e5 | 2011-11-17 17:59:50 -0800 | [diff] [blame] | 250 | ret = sas_queue_up(task); |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 251 | |
| 252 | /* Examine */ |
Dan Williams | 312d3e5 | 2011-11-17 17:59:50 -0800 | [diff] [blame] | 253 | if (ret) { |
| 254 | SAS_DPRINTK("lldd_execute_task returned: %d\n", ret); |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 255 | |
Darrick J. Wong | fe059f1 | 2007-01-30 01:18:55 -0800 | [diff] [blame] | 256 | if (qc->scsicmd) |
| 257 | ASSIGN_SAS_TASK(qc->scsicmd, NULL); |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 258 | sas_free_task(task); |
Dan Williams | 312d3e5 | 2011-11-17 17:59:50 -0800 | [diff] [blame] | 259 | ret = AC_ERR_SYSTEM; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 260 | } |
| 261 | |
Dan Williams | 312d3e5 | 2011-11-17 17:59:50 -0800 | [diff] [blame] | 262 | out: |
| 263 | spin_lock(ap->lock); |
| 264 | local_irq_restore(flags); |
| 265 | return ret; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 266 | } |
| 267 | |
Tejun Heo | 4c9bf4e | 2008-04-07 22:47:20 +0900 | [diff] [blame] | 268 | static bool sas_ata_qc_fill_rtf(struct ata_queued_cmd *qc) |
| 269 | { |
| 270 | struct domain_device *dev = qc->ap->private_data; |
| 271 | |
| 272 | memcpy(&qc->result_tf, &dev->sata_dev.tf, sizeof(qc->result_tf)); |
| 273 | return true; |
| 274 | } |
| 275 | |
Dan Williams | 36a3994 | 2011-11-17 17:59:54 -0800 | [diff] [blame] | 276 | static struct sas_internal *dev_to_sas_internal(struct domain_device *dev) |
| 277 | { |
| 278 | return to_sas_internal(dev->port->ha->core.shost->transportt); |
| 279 | } |
| 280 | |
Dan Williams | 354cf82 | 2012-01-12 17:57:35 -0800 | [diff] [blame] | 281 | static void sas_get_ata_command_set(struct domain_device *dev); |
| 282 | |
| 283 | int sas_get_ata_info(struct domain_device *dev, struct ex_phy *phy) |
| 284 | { |
| 285 | if (phy->attached_tproto & SAS_PROTOCOL_STP) |
| 286 | dev->tproto = phy->attached_tproto; |
| 287 | if (phy->attached_sata_dev) |
| 288 | dev->tproto |= SATA_DEV; |
| 289 | |
| 290 | if (phy->attached_dev_type == SATA_PENDING) |
| 291 | dev->dev_type = SATA_PENDING; |
| 292 | else { |
| 293 | int res; |
| 294 | |
| 295 | dev->dev_type = SATA_DEV; |
| 296 | res = sas_get_report_phy_sata(dev->parent, phy->phy_id, |
| 297 | &dev->sata_dev.rps_resp); |
| 298 | if (res) { |
| 299 | SAS_DPRINTK("report phy sata to %016llx:0x%x returned " |
| 300 | "0x%x\n", SAS_ADDR(dev->parent->sas_addr), |
| 301 | phy->phy_id, res); |
| 302 | return res; |
| 303 | } |
| 304 | memcpy(dev->frame_rcvd, &dev->sata_dev.rps_resp.rps.fis, |
| 305 | sizeof(struct dev_to_host_fis)); |
| 306 | /* TODO switch to ata_dev_classify() */ |
| 307 | sas_get_ata_command_set(dev); |
| 308 | } |
| 309 | return 0; |
| 310 | } |
| 311 | |
| 312 | static int sas_ata_clear_pending(struct domain_device *dev, struct ex_phy *phy) |
| 313 | { |
| 314 | int res; |
| 315 | |
| 316 | /* we weren't pending, so successfully end the reset sequence now */ |
| 317 | if (dev->dev_type != SATA_PENDING) |
| 318 | return 1; |
| 319 | |
| 320 | /* hmmm, if this succeeds do we need to repost the domain_device to the |
| 321 | * lldd so it can pick up new parameters? |
| 322 | */ |
| 323 | res = sas_get_ata_info(dev, phy); |
| 324 | if (res) |
| 325 | return 0; /* retry */ |
| 326 | else |
| 327 | return 1; |
| 328 | } |
| 329 | |
Dan Williams | 36a3994 | 2011-11-17 17:59:54 -0800 | [diff] [blame] | 330 | static int smp_ata_check_ready(struct ata_link *link) |
| 331 | { |
| 332 | int res; |
Dan Williams | 36a3994 | 2011-11-17 17:59:54 -0800 | [diff] [blame] | 333 | struct ata_port *ap = link->ap; |
| 334 | struct domain_device *dev = ap->private_data; |
| 335 | struct domain_device *ex_dev = dev->parent; |
Dan Williams | f41a0c4 | 2011-12-21 21:33:17 -0800 | [diff] [blame] | 336 | struct sas_phy *phy = sas_get_local_phy(dev); |
Dan Williams | 354cf82 | 2012-01-12 17:57:35 -0800 | [diff] [blame] | 337 | struct ex_phy *ex_phy = &ex_dev->ex_dev.ex_phy[phy->number]; |
Dan Williams | 36a3994 | 2011-11-17 17:59:54 -0800 | [diff] [blame] | 338 | |
Dan Williams | 354cf82 | 2012-01-12 17:57:35 -0800 | [diff] [blame] | 339 | res = sas_ex_phy_discover(ex_dev, phy->number); |
Dan Williams | f41a0c4 | 2011-12-21 21:33:17 -0800 | [diff] [blame] | 340 | sas_put_local_phy(phy); |
Dan Williams | 354cf82 | 2012-01-12 17:57:35 -0800 | [diff] [blame] | 341 | |
Dan Williams | 36a3994 | 2011-11-17 17:59:54 -0800 | [diff] [blame] | 342 | /* break the wait early if the expander is unreachable, |
| 343 | * otherwise keep polling |
| 344 | */ |
| 345 | if (res == -ECOMM) |
| 346 | return res; |
Dan Williams | 354cf82 | 2012-01-12 17:57:35 -0800 | [diff] [blame] | 347 | if (res != SMP_RESP_FUNC_ACC) |
Dan Williams | 36a3994 | 2011-11-17 17:59:54 -0800 | [diff] [blame] | 348 | return 0; |
Dan Williams | 354cf82 | 2012-01-12 17:57:35 -0800 | [diff] [blame] | 349 | |
| 350 | switch (ex_phy->attached_dev_type) { |
| 351 | case SATA_PENDING: |
| 352 | return 0; |
| 353 | case SAS_END_DEV: |
| 354 | if (ex_phy->attached_sata_dev) |
| 355 | return sas_ata_clear_pending(dev, ex_phy); |
| 356 | default: |
| 357 | return -ENODEV; |
| 358 | } |
Dan Williams | 36a3994 | 2011-11-17 17:59:54 -0800 | [diff] [blame] | 359 | } |
| 360 | |
| 361 | static int local_ata_check_ready(struct ata_link *link) |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 362 | { |
James Bottomley | 00dd499 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 363 | struct ata_port *ap = link->ap; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 364 | struct domain_device *dev = ap->private_data; |
Dan Williams | 36a3994 | 2011-11-17 17:59:54 -0800 | [diff] [blame] | 365 | struct sas_internal *i = dev_to_sas_internal(dev); |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 366 | |
Dan Williams | 36a3994 | 2011-11-17 17:59:54 -0800 | [diff] [blame] | 367 | if (i->dft->lldd_ata_check_ready) |
| 368 | return i->dft->lldd_ata_check_ready(dev); |
| 369 | else { |
| 370 | /* lldd's that don't implement 'ready' checking get the |
| 371 | * old default behavior of not coordinating reset |
| 372 | * recovery with libata |
| 373 | */ |
| 374 | return 1; |
James Bottomley | 00dd499 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 375 | } |
Dan Williams | 36a3994 | 2011-11-17 17:59:54 -0800 | [diff] [blame] | 376 | } |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 377 | |
Dan Williams | d214d81 | 2012-01-16 11:56:50 -0800 | [diff] [blame] | 378 | static int sas_ata_printk(const char *level, const struct domain_device *ddev, |
| 379 | const char *fmt, ...) |
| 380 | { |
| 381 | struct ata_port *ap = ddev->sata_dev.ap; |
| 382 | struct device *dev = &ddev->rphy->dev; |
| 383 | struct va_format vaf; |
| 384 | va_list args; |
| 385 | int r; |
| 386 | |
| 387 | va_start(args, fmt); |
| 388 | |
| 389 | vaf.fmt = fmt; |
| 390 | vaf.va = &args; |
| 391 | |
| 392 | r = printk("%ssas: ata%u: %s: %pV", |
| 393 | level, ap->print_id, dev_name(dev), &vaf); |
| 394 | |
| 395 | va_end(args); |
| 396 | |
| 397 | return r; |
| 398 | } |
| 399 | |
Dan Williams | 36a3994 | 2011-11-17 17:59:54 -0800 | [diff] [blame] | 400 | static int sas_ata_hard_reset(struct ata_link *link, unsigned int *class, |
| 401 | unsigned long deadline) |
| 402 | { |
| 403 | int ret = 0, res; |
Dan Williams | f41a0c4 | 2011-12-21 21:33:17 -0800 | [diff] [blame] | 404 | struct sas_phy *phy; |
Dan Williams | 36a3994 | 2011-11-17 17:59:54 -0800 | [diff] [blame] | 405 | struct ata_port *ap = link->ap; |
| 406 | int (*check_ready)(struct ata_link *link); |
| 407 | struct domain_device *dev = ap->private_data; |
Dan Williams | 36a3994 | 2011-11-17 17:59:54 -0800 | [diff] [blame] | 408 | struct sas_internal *i = dev_to_sas_internal(dev); |
| 409 | |
Dan Williams | cb48d67 | 2011-12-22 14:58:24 -0800 | [diff] [blame] | 410 | if (test_bit(SAS_DEV_GONE, &dev->state)) |
| 411 | return -ENODEV; |
| 412 | |
Dan Williams | 36a3994 | 2011-11-17 17:59:54 -0800 | [diff] [blame] | 413 | res = i->dft->lldd_I_T_nexus_reset(dev); |
| 414 | |
| 415 | if (res != TMF_RESP_FUNC_COMPLETE) |
Dan Williams | d214d81 | 2012-01-16 11:56:50 -0800 | [diff] [blame] | 416 | sas_ata_printk(KERN_DEBUG, dev, "Unable to reset ata device?\n"); |
Dan Williams | 36a3994 | 2011-11-17 17:59:54 -0800 | [diff] [blame] | 417 | |
Dan Williams | f41a0c4 | 2011-12-21 21:33:17 -0800 | [diff] [blame] | 418 | phy = sas_get_local_phy(dev); |
Dan Williams | 36a3994 | 2011-11-17 17:59:54 -0800 | [diff] [blame] | 419 | if (scsi_is_sas_phy_local(phy)) |
| 420 | check_ready = local_ata_check_ready; |
| 421 | else |
| 422 | check_ready = smp_ata_check_ready; |
Dan Williams | f41a0c4 | 2011-12-21 21:33:17 -0800 | [diff] [blame] | 423 | sas_put_local_phy(phy); |
Dan Williams | 36a3994 | 2011-11-17 17:59:54 -0800 | [diff] [blame] | 424 | |
| 425 | ret = ata_wait_after_reset(link, deadline, check_ready); |
| 426 | if (ret && ret != -EAGAIN) |
Dan Williams | d214d81 | 2012-01-16 11:56:50 -0800 | [diff] [blame] | 427 | sas_ata_printk(KERN_ERR, dev, "reset failed (errno=%d)\n", ret); |
Dan Williams | 36a3994 | 2011-11-17 17:59:54 -0800 | [diff] [blame] | 428 | |
| 429 | /* XXX: if the class changes during the reset the upper layer |
| 430 | * should be informed, if the device has gone away we assume |
| 431 | * libsas will eventually delete it |
| 432 | */ |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 433 | switch (dev->sata_dev.command_set) { |
Dan Williams | 36a3994 | 2011-11-17 17:59:54 -0800 | [diff] [blame] | 434 | case ATA_COMMAND_SET: |
| 435 | *class = ATA_DEV_ATA; |
| 436 | break; |
| 437 | case ATAPI_COMMAND_SET: |
| 438 | *class = ATA_DEV_ATAPI; |
| 439 | break; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 440 | } |
| 441 | |
| 442 | ap->cbl = ATA_CBL_SATA; |
James Bottomley | 00dd499 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 443 | return ret; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 444 | } |
| 445 | |
Dave Jiang | 1ca1e43 | 2011-05-24 13:18:04 -0700 | [diff] [blame] | 446 | static int sas_ata_soft_reset(struct ata_link *link, unsigned int *class, |
| 447 | unsigned long deadline) |
| 448 | { |
| 449 | struct ata_port *ap = link->ap; |
| 450 | struct domain_device *dev = ap->private_data; |
Dan Williams | 36a3994 | 2011-11-17 17:59:54 -0800 | [diff] [blame] | 451 | struct sas_internal *i = dev_to_sas_internal(dev); |
Dave Jiang | 1ca1e43 | 2011-05-24 13:18:04 -0700 | [diff] [blame] | 452 | int res = TMF_RESP_FUNC_FAILED; |
| 453 | int ret = 0; |
| 454 | |
| 455 | if (i->dft->lldd_ata_soft_reset) |
| 456 | res = i->dft->lldd_ata_soft_reset(dev); |
| 457 | |
| 458 | if (res != TMF_RESP_FUNC_COMPLETE) { |
| 459 | SAS_DPRINTK("%s: Unable to soft reset\n", __func__); |
| 460 | ret = -EAGAIN; |
| 461 | } |
| 462 | |
| 463 | switch (dev->sata_dev.command_set) { |
| 464 | case ATA_COMMAND_SET: |
| 465 | SAS_DPRINTK("%s: Found ATA device.\n", __func__); |
| 466 | *class = ATA_DEV_ATA; |
| 467 | break; |
| 468 | case ATAPI_COMMAND_SET: |
| 469 | SAS_DPRINTK("%s: Found ATAPI device.\n", __func__); |
| 470 | *class = ATA_DEV_ATAPI; |
| 471 | break; |
| 472 | default: |
| 473 | SAS_DPRINTK("%s: Unknown SATA command set: %d.\n", |
| 474 | __func__, dev->sata_dev.command_set); |
| 475 | *class = ATA_DEV_UNKNOWN; |
| 476 | break; |
| 477 | } |
| 478 | |
| 479 | ap->cbl = ATA_CBL_SATA; |
| 480 | return ret; |
| 481 | } |
| 482 | |
Dan Williams | 3dff572 | 2011-11-28 12:08:22 -0800 | [diff] [blame] | 483 | /* |
| 484 | * notify the lldd to forget the sas_task for this internal ata command |
| 485 | * that bypasses scsi-eh |
| 486 | */ |
| 487 | static void sas_ata_internal_abort(struct sas_task *task) |
| 488 | { |
Dan Williams | 36a3994 | 2011-11-17 17:59:54 -0800 | [diff] [blame] | 489 | struct sas_internal *si = dev_to_sas_internal(task->dev); |
Dan Williams | 3dff572 | 2011-11-28 12:08:22 -0800 | [diff] [blame] | 490 | unsigned long flags; |
| 491 | int res; |
| 492 | |
| 493 | spin_lock_irqsave(&task->task_state_lock, flags); |
| 494 | if (task->task_state_flags & SAS_TASK_STATE_ABORTED || |
| 495 | task->task_state_flags & SAS_TASK_STATE_DONE) { |
| 496 | spin_unlock_irqrestore(&task->task_state_lock, flags); |
| 497 | SAS_DPRINTK("%s: Task %p already finished.\n", __func__, |
| 498 | task); |
| 499 | goto out; |
| 500 | } |
| 501 | task->task_state_flags |= SAS_TASK_STATE_ABORTED; |
| 502 | spin_unlock_irqrestore(&task->task_state_lock, flags); |
| 503 | |
| 504 | res = si->dft->lldd_abort_task(task); |
| 505 | |
| 506 | spin_lock_irqsave(&task->task_state_lock, flags); |
| 507 | if (task->task_state_flags & SAS_TASK_STATE_DONE || |
| 508 | res == TMF_RESP_FUNC_COMPLETE) { |
| 509 | spin_unlock_irqrestore(&task->task_state_lock, flags); |
| 510 | goto out; |
| 511 | } |
| 512 | |
| 513 | /* XXX we are not prepared to deal with ->lldd_abort_task() |
| 514 | * failures. TODO: lldds need to unconditionally forget about |
| 515 | * aborted ata tasks, otherwise we (likely) leak the sas task |
| 516 | * here |
| 517 | */ |
| 518 | SAS_DPRINTK("%s: Task %p leaked.\n", __func__, task); |
| 519 | |
| 520 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) |
| 521 | task->task_state_flags &= ~SAS_TASK_STATE_ABORTED; |
| 522 | spin_unlock_irqrestore(&task->task_state_lock, flags); |
| 523 | |
| 524 | return; |
| 525 | out: |
| 526 | list_del_init(&task->list); |
| 527 | sas_free_task(task); |
| 528 | } |
| 529 | |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 530 | static void sas_ata_post_internal(struct ata_queued_cmd *qc) |
| 531 | { |
| 532 | if (qc->flags & ATA_QCFLAG_FAILED) |
| 533 | qc->err_mask |= AC_ERR_OTHER; |
| 534 | |
Darrick J. Wong | 1c50dc8 | 2007-01-30 01:18:41 -0800 | [diff] [blame] | 535 | if (qc->err_mask) { |
| 536 | /* |
Dan Williams | 3dff572 | 2011-11-28 12:08:22 -0800 | [diff] [blame] | 537 | * Find the sas_task and kill it. By this point, libata |
| 538 | * has decided to kill the qc and has frozen the port. |
| 539 | * In this state sas_ata_task_done() will no longer free |
| 540 | * the sas_task, so we need to notify the lldd (via |
| 541 | * ->lldd_abort_task) that the task is dead and free it |
| 542 | * ourselves. |
Darrick J. Wong | 1c50dc8 | 2007-01-30 01:18:41 -0800 | [diff] [blame] | 543 | */ |
| 544 | struct sas_task *task = qc->lldd_task; |
Darrick J. Wong | 1c50dc8 | 2007-01-30 01:18:41 -0800 | [diff] [blame] | 545 | |
| 546 | qc->lldd_task = NULL; |
Dan Williams | 3a2cdf3 | 2011-11-29 14:54:28 -0800 | [diff] [blame] | 547 | if (!task) |
| 548 | return; |
| 549 | task->uldd_task = NULL; |
| 550 | sas_ata_internal_abort(task); |
Darrick J. Wong | 1c50dc8 | 2007-01-30 01:18:41 -0800 | [diff] [blame] | 551 | } |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 552 | } |
| 553 | |
Dan Williams | b91bb29 | 2011-11-17 17:59:52 -0800 | [diff] [blame] | 554 | |
| 555 | static void sas_ata_set_dmamode(struct ata_port *ap, struct ata_device *ata_dev) |
| 556 | { |
| 557 | struct domain_device *dev = ap->private_data; |
Dan Williams | 36a3994 | 2011-11-17 17:59:54 -0800 | [diff] [blame] | 558 | struct sas_internal *i = dev_to_sas_internal(dev); |
Dan Williams | b91bb29 | 2011-11-17 17:59:52 -0800 | [diff] [blame] | 559 | |
| 560 | if (i->dft->lldd_ata_set_dmamode) |
| 561 | i->dft->lldd_ata_set_dmamode(dev); |
| 562 | } |
| 563 | |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 564 | static struct ata_port_operations sas_sata_ops = { |
James Bottomley | 00dd499 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 565 | .prereset = ata_std_prereset, |
Dave Jiang | 1ca1e43 | 2011-05-24 13:18:04 -0700 | [diff] [blame] | 566 | .softreset = sas_ata_soft_reset, |
James Bottomley | 00dd499 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 567 | .hardreset = sas_ata_hard_reset, |
| 568 | .postreset = ata_std_postreset, |
| 569 | .error_handler = ata_std_error_handler, |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 570 | .post_internal_cmd = sas_ata_post_internal, |
David Milburn | f0ad30d | 2010-09-03 17:13:03 -0500 | [diff] [blame] | 571 | .qc_defer = ata_std_qc_defer, |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 572 | .qc_prep = ata_noop_qc_prep, |
| 573 | .qc_issue = sas_ata_qc_issue, |
Tejun Heo | 4c9bf4e | 2008-04-07 22:47:20 +0900 | [diff] [blame] | 574 | .qc_fill_rtf = sas_ata_qc_fill_rtf, |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 575 | .port_start = ata_sas_port_start, |
| 576 | .port_stop = ata_sas_port_stop, |
Dan Williams | b91bb29 | 2011-11-17 17:59:52 -0800 | [diff] [blame] | 577 | .set_dmamode = sas_ata_set_dmamode, |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 578 | }; |
| 579 | |
| 580 | static struct ata_port_info sata_port_info = { |
Sergei Shtylyov | 9cbe056 | 2011-02-04 22:05:48 +0300 | [diff] [blame] | 581 | .flags = ATA_FLAG_SATA | ATA_FLAG_PIO_DMA | ATA_FLAG_NCQ, |
Sergei Shtylyov | 0f2e033 | 2011-01-21 20:32:01 +0300 | [diff] [blame] | 582 | .pio_mask = ATA_PIO4, |
| 583 | .mwdma_mask = ATA_MWDMA2, |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 584 | .udma_mask = ATA_UDMA6, |
| 585 | .port_ops = &sas_sata_ops |
| 586 | }; |
| 587 | |
Dan Williams | 9508a66 | 2012-01-18 20:47:01 -0800 | [diff] [blame^] | 588 | int sas_ata_init_host_and_port(struct domain_device *found_dev) |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 589 | { |
Dan Williams | 9508a66 | 2012-01-18 20:47:01 -0800 | [diff] [blame^] | 590 | struct sas_ha_struct *ha = found_dev->port->ha; |
| 591 | struct Scsi_Host *shost = ha->core.shost; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 592 | struct ata_port *ap; |
| 593 | |
| 594 | ata_host_init(&found_dev->sata_dev.ata_host, |
Jeff Garzik | 1d1bbee | 2007-07-26 09:28:37 -0400 | [diff] [blame] | 595 | ha->dev, |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 596 | sata_port_info.flags, |
| 597 | &sas_sata_ops); |
| 598 | ap = ata_sas_port_alloc(&found_dev->sata_dev.ata_host, |
| 599 | &sata_port_info, |
| 600 | shost); |
| 601 | if (!ap) { |
| 602 | SAS_DPRINTK("ata_sas_port_alloc failed.\n"); |
| 603 | return -ENODEV; |
| 604 | } |
| 605 | |
| 606 | ap->private_data = found_dev; |
| 607 | ap->cbl = ATA_CBL_SATA; |
| 608 | ap->scsi_host = shost; |
Dan Williams | 9508a66 | 2012-01-18 20:47:01 -0800 | [diff] [blame^] | 609 | /* publish initialized ata port */ |
| 610 | smp_wmb(); |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 611 | found_dev->sata_dev.ap = ap; |
| 612 | |
| 613 | return 0; |
| 614 | } |
Darrick J. Wong | 3a2755a | 2007-01-30 01:18:58 -0800 | [diff] [blame] | 615 | |
| 616 | void sas_ata_task_abort(struct sas_task *task) |
| 617 | { |
| 618 | struct ata_queued_cmd *qc = task->uldd_task; |
| 619 | struct completion *waiting; |
| 620 | |
| 621 | /* Bounce SCSI-initiated commands to the SCSI EH */ |
| 622 | if (qc->scsicmd) { |
James Bottomley | 1b4d0d8 | 2010-05-13 09:31:54 -0500 | [diff] [blame] | 623 | struct request_queue *q = qc->scsicmd->device->request_queue; |
| 624 | unsigned long flags; |
| 625 | |
Tejun Heo | 70b25f8 | 2010-04-15 09:00:08 +0900 | [diff] [blame] | 626 | spin_lock_irqsave(q->queue_lock, flags); |
Jens Axboe | 242f9dc | 2008-09-14 05:55:09 -0700 | [diff] [blame] | 627 | blk_abort_request(qc->scsicmd->request); |
Tejun Heo | 70b25f8 | 2010-04-15 09:00:08 +0900 | [diff] [blame] | 628 | spin_unlock_irqrestore(q->queue_lock, flags); |
Darrick J. Wong | 3a2755a | 2007-01-30 01:18:58 -0800 | [diff] [blame] | 629 | scsi_schedule_eh(qc->scsicmd->device->host); |
| 630 | return; |
| 631 | } |
| 632 | |
| 633 | /* Internal command, fake a timeout and complete. */ |
| 634 | qc->flags &= ~ATA_QCFLAG_ACTIVE; |
| 635 | qc->flags |= ATA_QCFLAG_FAILED; |
| 636 | qc->err_mask |= AC_ERR_TIMEOUT; |
| 637 | waiting = qc->private_data; |
| 638 | complete(waiting); |
| 639 | } |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 640 | |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 641 | static void sas_get_ata_command_set(struct domain_device *dev) |
| 642 | { |
| 643 | struct dev_to_host_fis *fis = |
| 644 | (struct dev_to_host_fis *) dev->frame_rcvd; |
| 645 | |
Dan Williams | 354cf82 | 2012-01-12 17:57:35 -0800 | [diff] [blame] | 646 | if (dev->dev_type == SATA_PENDING) |
| 647 | return; |
| 648 | |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 649 | if ((fis->sector_count == 1 && /* ATA */ |
| 650 | fis->lbal == 1 && |
| 651 | fis->lbam == 0 && |
| 652 | fis->lbah == 0 && |
| 653 | fis->device == 0) |
| 654 | || |
| 655 | (fis->sector_count == 0 && /* CE-ATA (mATA) */ |
| 656 | fis->lbal == 0 && |
| 657 | fis->lbam == 0xCE && |
| 658 | fis->lbah == 0xAA && |
| 659 | (fis->device & ~0x10) == 0)) |
| 660 | |
| 661 | dev->sata_dev.command_set = ATA_COMMAND_SET; |
| 662 | |
| 663 | else if ((fis->interrupt_reason == 1 && /* ATAPI */ |
| 664 | fis->lbal == 1 && |
| 665 | fis->byte_count_low == 0x14 && |
| 666 | fis->byte_count_high == 0xEB && |
| 667 | (fis->device & ~0x10) == 0)) |
| 668 | |
| 669 | dev->sata_dev.command_set = ATAPI_COMMAND_SET; |
| 670 | |
| 671 | else if ((fis->sector_count == 1 && /* SEMB */ |
| 672 | fis->lbal == 1 && |
| 673 | fis->lbam == 0x3C && |
| 674 | fis->lbah == 0xC3 && |
| 675 | fis->device == 0) |
| 676 | || |
| 677 | (fis->interrupt_reason == 1 && /* SATA PM */ |
| 678 | fis->lbal == 1 && |
| 679 | fis->byte_count_low == 0x69 && |
| 680 | fis->byte_count_high == 0x96 && |
| 681 | (fis->device & ~0x10) == 0)) |
| 682 | |
| 683 | /* Treat it as a superset? */ |
| 684 | dev->sata_dev.command_set = ATAPI_COMMAND_SET; |
| 685 | } |
| 686 | |
Dan Williams | 9508a66 | 2012-01-18 20:47:01 -0800 | [diff] [blame^] | 687 | void sas_probe_sata(struct asd_sas_port *port) |
| 688 | { |
| 689 | struct domain_device *dev, *n; |
| 690 | int err; |
| 691 | |
| 692 | mutex_lock(&port->ha->disco_mutex); |
| 693 | list_for_each_entry_safe(dev, n, &port->disco_list, disco_list_node) { |
| 694 | if (!dev_is_sata(dev)) |
| 695 | continue; |
| 696 | |
| 697 | err = sas_ata_init_host_and_port(dev); |
| 698 | if (err) |
| 699 | sas_fail_probe(dev, __func__, err); |
| 700 | else |
| 701 | ata_sas_async_port_init(dev->sata_dev.ap); |
| 702 | } |
| 703 | mutex_unlock(&port->ha->disco_mutex); |
| 704 | |
| 705 | list_for_each_entry_safe(dev, n, &port->disco_list, disco_list_node) { |
| 706 | if (!dev_is_sata(dev)) |
| 707 | continue; |
| 708 | |
| 709 | sas_ata_wait_eh(dev); |
| 710 | |
| 711 | /* if libata could not bring the link up, don't surface |
| 712 | * the device |
| 713 | */ |
| 714 | if (ata_dev_disabled(sas_to_ata_dev(dev))) |
| 715 | sas_fail_probe(dev, __func__, -ENODEV); |
| 716 | } |
| 717 | } |
| 718 | |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 719 | /** |
| 720 | * sas_discover_sata -- discover an STP/SATA domain device |
| 721 | * @dev: pointer to struct domain_device of interest |
| 722 | * |
Dan Williams | b91bb29 | 2011-11-17 17:59:52 -0800 | [diff] [blame] | 723 | * Devices directly attached to a HA port, have no parents. All other |
| 724 | * devices do, and should have their "parent" pointer set appropriately |
| 725 | * before calling this function. |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 726 | */ |
| 727 | int sas_discover_sata(struct domain_device *dev) |
| 728 | { |
| 729 | int res; |
| 730 | |
Dan Williams | b91bb29 | 2011-11-17 17:59:52 -0800 | [diff] [blame] | 731 | if (dev->dev_type == SATA_PM) |
| 732 | return -ENODEV; |
| 733 | |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 734 | sas_get_ata_command_set(dev); |
Dan Williams | b91bb29 | 2011-11-17 17:59:52 -0800 | [diff] [blame] | 735 | sas_fill_in_rphy(dev, dev->rphy); |
Dan Williams | 87c8331 | 2011-11-17 17:59:51 -0800 | [diff] [blame] | 736 | |
| 737 | res = sas_notify_lldd_dev_found(dev); |
| 738 | if (res) |
| 739 | return res; |
| 740 | |
| 741 | sas_discover_event(dev->port, DISCE_PROBE); |
Dan Williams | b91bb29 | 2011-11-17 17:59:52 -0800 | [diff] [blame] | 742 | return 0; |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 743 | } |
James Bottomley | 00dd499 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 744 | |
Dan Williams | 50824d6 | 2011-12-04 01:06:24 -0800 | [diff] [blame] | 745 | static void async_sas_ata_eh(void *data, async_cookie_t cookie) |
| 746 | { |
| 747 | struct domain_device *dev = data; |
| 748 | struct ata_port *ap = dev->sata_dev.ap; |
| 749 | struct sas_ha_struct *ha = dev->port->ha; |
| 750 | |
Dan Williams | 8abda4d | 2012-01-10 15:14:09 -0800 | [diff] [blame] | 751 | /* hold a reference over eh since we may be racing with final |
| 752 | * remove once all commands are completed |
| 753 | */ |
| 754 | kref_get(&dev->kref); |
Dan Williams | d214d81 | 2012-01-16 11:56:50 -0800 | [diff] [blame] | 755 | sas_ata_printk(KERN_DEBUG, dev, "dev error handler\n"); |
Dan Williams | 50824d6 | 2011-12-04 01:06:24 -0800 | [diff] [blame] | 756 | ata_scsi_port_error_handler(ha->core.shost, ap); |
Dan Williams | 8abda4d | 2012-01-10 15:14:09 -0800 | [diff] [blame] | 757 | sas_put_device(dev); |
Dan Williams | 50824d6 | 2011-12-04 01:06:24 -0800 | [diff] [blame] | 758 | } |
| 759 | |
Dan Williams | 9508a66 | 2012-01-18 20:47:01 -0800 | [diff] [blame^] | 760 | static bool sas_ata_dev_eh_valid(struct domain_device *dev) |
| 761 | { |
| 762 | struct ata_port *ap; |
| 763 | |
| 764 | if (!dev_is_sata(dev)) |
| 765 | return false; |
| 766 | ap = dev->sata_dev.ap; |
| 767 | /* consume fully initialized ata ports */ |
| 768 | smp_rmb(); |
| 769 | return !!ap; |
| 770 | } |
| 771 | |
James Bottomley | 00dd499 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 772 | void sas_ata_strategy_handler(struct Scsi_Host *shost) |
| 773 | { |
Dan Williams | 87c8331 | 2011-11-17 17:59:51 -0800 | [diff] [blame] | 774 | struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost); |
Dan Williams | 50824d6 | 2011-12-04 01:06:24 -0800 | [diff] [blame] | 775 | LIST_HEAD(async); |
Dan Williams | 9508a66 | 2012-01-18 20:47:01 -0800 | [diff] [blame^] | 776 | int i; |
Dan Williams | 87c8331 | 2011-11-17 17:59:51 -0800 | [diff] [blame] | 777 | |
| 778 | /* it's ok to defer revalidation events during ata eh, these |
| 779 | * disks are in one of three states: |
| 780 | * 1/ present for initial domain discovery, and these |
| 781 | * resets will cause bcn flutters |
| 782 | * 2/ hot removed, we'll discover that after eh fails |
| 783 | * 3/ hot added after initial discovery, lost the race, and need |
| 784 | * to catch the next train. |
| 785 | */ |
| 786 | sas_disable_revalidation(sas_ha); |
James Bottomley | 00dd499 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 787 | |
Dan Williams | 9508a66 | 2012-01-18 20:47:01 -0800 | [diff] [blame^] | 788 | spin_lock_irq(&sas_ha->phy_port_lock); |
| 789 | for (i = 0; i < sas_ha->num_phys; i++) { |
| 790 | struct asd_sas_port *port = sas_ha->sas_port[i]; |
| 791 | struct domain_device *dev; |
James Bottomley | 00dd499 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 792 | |
Dan Williams | 9508a66 | 2012-01-18 20:47:01 -0800 | [diff] [blame^] | 793 | spin_lock(&port->dev_list_lock); |
| 794 | list_for_each_entry(dev, &port->dev_list, dev_list_node) { |
| 795 | if (!sas_ata_dev_eh_valid(dev)) |
| 796 | continue; |
| 797 | async_schedule_domain(async_sas_ata_eh, dev, &async); |
| 798 | } |
| 799 | spin_unlock(&port->dev_list_lock); |
James Bottomley | 00dd499 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 800 | } |
Dan Williams | 9508a66 | 2012-01-18 20:47:01 -0800 | [diff] [blame^] | 801 | spin_unlock_irq(&sas_ha->phy_port_lock); |
| 802 | |
Dan Williams | 50824d6 | 2011-12-04 01:06:24 -0800 | [diff] [blame] | 803 | async_synchronize_full_domain(&async); |
Dan Williams | 87c8331 | 2011-11-17 17:59:51 -0800 | [diff] [blame] | 804 | |
| 805 | sas_enable_revalidation(sas_ha); |
James Bottomley | 00dd499 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 806 | } |
| 807 | |
Dan Williams | d230ce6 | 2012-01-11 12:08:36 -0800 | [diff] [blame] | 808 | void sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q, |
| 809 | struct list_head *done_q) |
James Bottomley | 00dd499 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 810 | { |
James Bottomley | 00dd499 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 811 | struct scsi_cmnd *cmd, *n; |
Dan Williams | d214d81 | 2012-01-16 11:56:50 -0800 | [diff] [blame] | 812 | struct domain_device *eh_dev; |
James Bottomley | 00dd499 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 813 | |
| 814 | do { |
| 815 | LIST_HEAD(sata_q); |
Dan Williams | d214d81 | 2012-01-16 11:56:50 -0800 | [diff] [blame] | 816 | eh_dev = NULL; |
James Bottomley | c299190 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 817 | |
James Bottomley | 00dd499 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 818 | list_for_each_entry_safe(cmd, n, work_q, eh_entry) { |
| 819 | struct domain_device *ddev = cmd_to_domain_dev(cmd); |
| 820 | |
| 821 | if (!dev_is_sata(ddev) || TO_SAS_TASK(cmd)) |
| 822 | continue; |
Dan Williams | d214d81 | 2012-01-16 11:56:50 -0800 | [diff] [blame] | 823 | if (eh_dev && eh_dev != ddev) |
James Bottomley | 00dd499 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 824 | continue; |
Dan Williams | d214d81 | 2012-01-16 11:56:50 -0800 | [diff] [blame] | 825 | eh_dev = ddev; |
James Bottomley | 00dd499 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 826 | list_move(&cmd->eh_entry, &sata_q); |
| 827 | } |
| 828 | |
| 829 | if (!list_empty(&sata_q)) { |
Dan Williams | d214d81 | 2012-01-16 11:56:50 -0800 | [diff] [blame] | 830 | struct ata_port *ap = eh_dev->sata_dev.ap; |
| 831 | |
| 832 | sas_ata_printk(KERN_DEBUG, eh_dev, "cmd error handler\n"); |
James Bottomley | 00dd499 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 833 | ata_scsi_cmd_error_handler(shost, ap, &sata_q); |
James Bottomley | a82058a | 2011-03-10 17:13:18 -0600 | [diff] [blame] | 834 | /* |
| 835 | * ata's error handler may leave the cmd on the list |
| 836 | * so make sure they don't remain on a stack list |
| 837 | * about to go out of scope. |
| 838 | * |
| 839 | * This looks strange, since the commands are |
| 840 | * now part of no list, but the next error |
| 841 | * action will be ata_port_error_handler() |
| 842 | * which takes no list and sweeps them up |
| 843 | * anyway from the ata tag array. |
| 844 | */ |
| 845 | while (!list_empty(&sata_q)) |
| 846 | list_del_init(sata_q.next); |
James Bottomley | 00dd499 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 847 | } |
Dan Williams | d214d81 | 2012-01-16 11:56:50 -0800 | [diff] [blame] | 848 | } while (eh_dev); |
James Bottomley | 00dd499 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 849 | } |
Dan Williams | b52df41 | 2011-11-30 23:23:33 -0800 | [diff] [blame] | 850 | |
| 851 | void sas_ata_schedule_reset(struct domain_device *dev) |
| 852 | { |
| 853 | struct ata_eh_info *ehi; |
| 854 | struct ata_port *ap; |
| 855 | unsigned long flags; |
| 856 | |
| 857 | if (!dev_is_sata(dev)) |
| 858 | return; |
| 859 | |
| 860 | ap = dev->sata_dev.ap; |
| 861 | ehi = &ap->link.eh_info; |
| 862 | |
| 863 | spin_lock_irqsave(ap->lock, flags); |
| 864 | ehi->err_mask |= AC_ERR_TIMEOUT; |
| 865 | ehi->action |= ATA_EH_RESET; |
| 866 | ata_port_schedule_eh(ap); |
| 867 | spin_unlock_irqrestore(ap->lock, flags); |
| 868 | } |
Dan Williams | 43a5ab1 | 2011-12-08 23:20:44 -0800 | [diff] [blame] | 869 | EXPORT_SYMBOL_GPL(sas_ata_schedule_reset); |
Dan Williams | 81c757b | 2011-12-02 16:07:01 -0800 | [diff] [blame] | 870 | |
| 871 | void sas_ata_wait_eh(struct domain_device *dev) |
| 872 | { |
| 873 | struct ata_port *ap; |
| 874 | |
| 875 | if (!dev_is_sata(dev)) |
| 876 | return; |
| 877 | |
| 878 | ap = dev->sata_dev.ap; |
| 879 | ata_port_wait_eh(ap); |
| 880 | } |