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> |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 26 | |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 27 | #include <scsi/sas_ata.h> |
| 28 | #include "sas_internal.h" |
| 29 | #include <scsi/scsi_host.h> |
| 30 | #include <scsi/scsi_device.h> |
| 31 | #include <scsi/scsi_tcq.h> |
| 32 | #include <scsi/scsi.h> |
| 33 | #include <scsi/scsi_transport.h> |
| 34 | #include <scsi/scsi_transport_sas.h> |
| 35 | #include "../scsi_sas_internal.h" |
Darrick J. Wong | 3a2755a | 2007-01-30 01:18:58 -0800 | [diff] [blame] | 36 | #include "../scsi_transport_api.h" |
| 37 | #include <scsi/scsi_eh.h> |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 38 | |
| 39 | static enum ata_completion_errors sas_to_ata_err(struct task_status_struct *ts) |
| 40 | { |
| 41 | /* Cheesy attempt to translate SAS errors into ATA. Hah! */ |
| 42 | |
| 43 | /* transport error */ |
| 44 | if (ts->resp == SAS_TASK_UNDELIVERED) |
| 45 | return AC_ERR_ATA_BUS; |
| 46 | |
| 47 | /* ts->resp == SAS_TASK_COMPLETE */ |
| 48 | /* task delivered, what happened afterwards? */ |
| 49 | switch (ts->stat) { |
| 50 | case SAS_DEV_NO_RESPONSE: |
| 51 | return AC_ERR_TIMEOUT; |
| 52 | |
| 53 | case SAS_INTERRUPTED: |
| 54 | case SAS_PHY_DOWN: |
| 55 | case SAS_NAK_R_ERR: |
| 56 | return AC_ERR_ATA_BUS; |
| 57 | |
| 58 | |
| 59 | case SAS_DATA_UNDERRUN: |
| 60 | /* |
| 61 | * Some programs that use the taskfile interface |
| 62 | * (smartctl in particular) can cause underrun |
| 63 | * problems. Ignore these errors, perhaps at our |
| 64 | * peril. |
| 65 | */ |
| 66 | return 0; |
| 67 | |
| 68 | case SAS_DATA_OVERRUN: |
| 69 | case SAS_QUEUE_FULL: |
| 70 | case SAS_DEVICE_UNKNOWN: |
| 71 | case SAS_SG_ERR: |
| 72 | return AC_ERR_INVALID; |
| 73 | |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 74 | case SAS_OPEN_TO: |
| 75 | case SAS_OPEN_REJECT: |
| 76 | SAS_DPRINTK("%s: Saw error %d. What to do?\n", |
Harvey Harrison | cadbd4a | 2008-07-03 23:47:27 -0700 | [diff] [blame] | 77 | __func__, ts->stat); |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 78 | return AC_ERR_OTHER; |
| 79 | |
James Bottomley | 75c0b38 | 2011-01-23 08:16:24 -0600 | [diff] [blame] | 80 | case SAM_STAT_CHECK_CONDITION: |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 81 | case SAS_ABORTED_TASK: |
| 82 | return AC_ERR_DEV; |
| 83 | |
| 84 | case SAS_PROTO_RESPONSE: |
| 85 | /* This means the ending_fis has the error |
| 86 | * value; return 0 here to collect it */ |
| 87 | return 0; |
| 88 | default: |
| 89 | return 0; |
| 90 | } |
| 91 | } |
| 92 | |
| 93 | static void sas_ata_task_done(struct sas_task *task) |
| 94 | { |
| 95 | struct ata_queued_cmd *qc = task->uldd_task; |
Darrick J. Wong | 1c50dc8 | 2007-01-30 01:18:41 -0800 | [diff] [blame] | 96 | struct domain_device *dev; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 97 | struct task_status_struct *stat = &task->task_status; |
| 98 | struct ata_task_resp *resp = (struct ata_task_resp *)stat->buf; |
Darrick J. Wong | 3a2755a | 2007-01-30 01:18:58 -0800 | [diff] [blame] | 99 | struct sas_ha_struct *sas_ha; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 100 | enum ata_completion_errors ac; |
Darrick J. Wong | 3eb7a51 | 2007-01-30 01:18:35 -0800 | [diff] [blame] | 101 | unsigned long flags; |
Xiangliang Yu | bb650a1 | 2011-05-08 19:27:01 +0800 | [diff] [blame] | 102 | struct ata_link *link; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 103 | |
Darrick J. Wong | 1c50dc8 | 2007-01-30 01:18:41 -0800 | [diff] [blame] | 104 | if (!qc) |
| 105 | goto qc_already_gone; |
| 106 | |
| 107 | dev = qc->ap->private_data; |
Darrick J. Wong | 3a2755a | 2007-01-30 01:18:58 -0800 | [diff] [blame] | 108 | sas_ha = dev->port->ha; |
Xiangliang Yu | bb650a1 | 2011-05-08 19:27:01 +0800 | [diff] [blame] | 109 | link = &dev->sata_dev.ap->link; |
Darrick J. Wong | 1c50dc8 | 2007-01-30 01:18:41 -0800 | [diff] [blame] | 110 | |
Darrick J. Wong | 3eb7a51 | 2007-01-30 01:18:35 -0800 | [diff] [blame] | 111 | spin_lock_irqsave(dev->sata_dev.ap->lock, flags); |
James Bottomley | 75c0b38 | 2011-01-23 08:16:24 -0600 | [diff] [blame] | 112 | if (stat->stat == SAS_PROTO_RESPONSE || stat->stat == SAM_STAT_GOOD || |
| 113 | ((stat->stat == SAM_STAT_CHECK_CONDITION && |
| 114 | dev->sata_dev.command_set == ATAPI_COMMAND_SET))) { |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 115 | ata_tf_from_fis(resp->ending_fis, &dev->sata_dev.tf); |
Xiangliang Yu | bb650a1 | 2011-05-08 19:27:01 +0800 | [diff] [blame] | 116 | |
| 117 | if (!link->sactive) { |
| 118 | qc->err_mask |= ac_err_mask(dev->sata_dev.tf.command); |
| 119 | } else { |
| 120 | link->eh_info.err_mask |= ac_err_mask(dev->sata_dev.tf.command); |
| 121 | if (unlikely(link->eh_info.err_mask)) |
| 122 | qc->flags |= ATA_QCFLAG_FAILED; |
| 123 | } |
| 124 | |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 125 | dev->sata_dev.sstatus = resp->sstatus; |
| 126 | dev->sata_dev.serror = resp->serror; |
| 127 | dev->sata_dev.scontrol = resp->scontrol; |
James Bottomley | 75c0b38 | 2011-01-23 08:16:24 -0600 | [diff] [blame] | 128 | } else { |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 129 | ac = sas_to_ata_err(stat); |
| 130 | if (ac) { |
Harvey Harrison | cadbd4a | 2008-07-03 23:47:27 -0700 | [diff] [blame] | 131 | SAS_DPRINTK("%s: SAS error %x\n", __func__, |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 132 | stat->stat); |
| 133 | /* We saw a SAS error. Send a vague error. */ |
Xiangliang Yu | bb650a1 | 2011-05-08 19:27:01 +0800 | [diff] [blame] | 134 | if (!link->sactive) { |
| 135 | qc->err_mask = ac; |
| 136 | } else { |
| 137 | link->eh_info.err_mask |= AC_ERR_DEV; |
| 138 | qc->flags |= ATA_QCFLAG_FAILED; |
| 139 | } |
| 140 | |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 141 | dev->sata_dev.tf.feature = 0x04; /* status err */ |
| 142 | dev->sata_dev.tf.command = ATA_ERR; |
| 143 | } |
| 144 | } |
| 145 | |
Darrick J. Wong | 1c50dc8 | 2007-01-30 01:18:41 -0800 | [diff] [blame] | 146 | qc->lldd_task = NULL; |
Darrick J. Wong | fe059f1 | 2007-01-30 01:18:55 -0800 | [diff] [blame] | 147 | if (qc->scsicmd) |
| 148 | ASSIGN_SAS_TASK(qc->scsicmd, NULL); |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 149 | ata_qc_complete(qc); |
Darrick J. Wong | 3eb7a51 | 2007-01-30 01:18:35 -0800 | [diff] [blame] | 150 | spin_unlock_irqrestore(dev->sata_dev.ap->lock, flags); |
| 151 | |
Darrick J. Wong | 3a2755a | 2007-01-30 01:18:58 -0800 | [diff] [blame] | 152 | /* |
| 153 | * If the sas_task has an ata qc, a scsi_cmnd and the aborted |
| 154 | * flag is set, then we must have come in via the libsas EH |
| 155 | * functions. When we exit this function, we need to put the |
| 156 | * scsi_cmnd on the list of finished errors. The ata_qc_complete |
| 157 | * call cleans up the libata side of things but we're protected |
| 158 | * from the scsi_cmnd going away because the scsi_cmnd is owned |
| 159 | * by the EH, making libata's call to scsi_done a NOP. |
| 160 | */ |
| 161 | spin_lock_irqsave(&task->task_state_lock, flags); |
| 162 | if (qc->scsicmd && task->task_state_flags & SAS_TASK_STATE_ABORTED) |
| 163 | scsi_eh_finish_cmd(qc->scsicmd, &sas_ha->eh_done_q); |
| 164 | spin_unlock_irqrestore(&task->task_state_lock, flags); |
| 165 | |
Darrick J. Wong | 1c50dc8 | 2007-01-30 01:18:41 -0800 | [diff] [blame] | 166 | qc_already_gone: |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 167 | list_del_init(&task->list); |
| 168 | sas_free_task(task); |
| 169 | } |
| 170 | |
| 171 | static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc) |
| 172 | { |
Darrick J. Wong | 35a7f2f | 2007-01-30 01:18:38 -0800 | [diff] [blame] | 173 | int res; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 174 | struct sas_task *task; |
| 175 | struct domain_device *dev = qc->ap->private_data; |
| 176 | struct sas_ha_struct *sas_ha = dev->port->ha; |
| 177 | struct Scsi_Host *host = sas_ha->core.shost; |
| 178 | struct sas_internal *i = to_sas_internal(host->transportt); |
| 179 | struct scatterlist *sg; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 180 | unsigned int xfer = 0; |
Tejun Heo | ff2aeb1 | 2007-12-05 16:43:11 +0900 | [diff] [blame] | 181 | unsigned int si; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 182 | |
Darrick J. Wong | 56dd2c0 | 2010-10-01 13:55:47 -0700 | [diff] [blame] | 183 | /* If the device fell off, no sense in issuing commands */ |
| 184 | if (dev->gone) |
| 185 | return AC_ERR_SYSTEM; |
| 186 | |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 187 | task = sas_alloc_task(GFP_ATOMIC); |
| 188 | if (!task) |
Darrick J. Wong | 35a7f2f | 2007-01-30 01:18:38 -0800 | [diff] [blame] | 189 | return AC_ERR_SYSTEM; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 190 | task->dev = dev; |
| 191 | task->task_proto = SAS_PROTOCOL_STP; |
| 192 | task->task_done = sas_ata_task_done; |
| 193 | |
| 194 | if (qc->tf.command == ATA_CMD_FPDMA_WRITE || |
| 195 | qc->tf.command == ATA_CMD_FPDMA_READ) { |
| 196 | /* Need to zero out the tag libata assigned us */ |
| 197 | qc->tf.nsect = 0; |
| 198 | } |
| 199 | |
James Bottomley | 110dd8f | 2007-07-20 13:11:44 -0500 | [diff] [blame] | 200 | 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] | 201 | task->uldd_task = qc; |
Tejun Heo | 405e66b | 2007-11-27 19:28:53 +0900 | [diff] [blame] | 202 | if (ata_is_atapi(qc->tf.protocol)) { |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 203 | memcpy(task->ata_task.atapi_packet, qc->cdb, qc->dev->cdb_len); |
James Bottomley | dde2020 | 2008-02-19 11:36:56 +0100 | [diff] [blame] | 204 | task->total_xfer_len = qc->nbytes; |
| 205 | task->num_scatter = qc->n_elem; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 206 | } else { |
Tejun Heo | ff2aeb1 | 2007-12-05 16:43:11 +0900 | [diff] [blame] | 207 | for_each_sg(qc->sg, sg, qc->n_elem, si) |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 208 | xfer += sg->length; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 209 | |
| 210 | task->total_xfer_len = xfer; |
Tejun Heo | ff2aeb1 | 2007-12-05 16:43:11 +0900 | [diff] [blame] | 211 | task->num_scatter = si; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 212 | } |
| 213 | |
| 214 | task->data_dir = qc->dma_dir; |
Tejun Heo | ff2aeb1 | 2007-12-05 16:43:11 +0900 | [diff] [blame] | 215 | task->scatter = qc->sg; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 216 | task->ata_task.retry_count = 1; |
| 217 | task->task_state_flags = SAS_TASK_STATE_PENDING; |
Darrick J. Wong | 1c50dc8 | 2007-01-30 01:18:41 -0800 | [diff] [blame] | 218 | qc->lldd_task = task; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 219 | |
| 220 | switch (qc->tf.protocol) { |
| 221 | case ATA_PROT_NCQ: |
| 222 | task->ata_task.use_ncq = 1; |
| 223 | /* fall through */ |
Tejun Heo | 0dc3688 | 2007-12-18 16:34:43 -0500 | [diff] [blame] | 224 | case ATAPI_PROT_DMA: |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 225 | case ATA_PROT_DMA: |
| 226 | task->ata_task.dma_xfer = 1; |
| 227 | break; |
| 228 | } |
| 229 | |
Darrick J. Wong | fe059f1 | 2007-01-30 01:18:55 -0800 | [diff] [blame] | 230 | if (qc->scsicmd) |
| 231 | ASSIGN_SAS_TASK(qc->scsicmd, task); |
| 232 | |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 233 | if (sas_ha->lldd_max_execute_num < 2) |
| 234 | res = i->dft->lldd_execute_task(task, 1, GFP_ATOMIC); |
| 235 | else |
| 236 | res = sas_queue_up(task); |
| 237 | |
| 238 | /* Examine */ |
| 239 | if (res) { |
| 240 | SAS_DPRINTK("lldd_execute_task returned: %d\n", res); |
| 241 | |
Darrick J. Wong | fe059f1 | 2007-01-30 01:18:55 -0800 | [diff] [blame] | 242 | if (qc->scsicmd) |
| 243 | ASSIGN_SAS_TASK(qc->scsicmd, NULL); |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 244 | sas_free_task(task); |
Darrick J. Wong | 35a7f2f | 2007-01-30 01:18:38 -0800 | [diff] [blame] | 245 | return AC_ERR_SYSTEM; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 246 | } |
| 247 | |
Darrick J. Wong | 35a7f2f | 2007-01-30 01:18:38 -0800 | [diff] [blame] | 248 | return 0; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 249 | } |
| 250 | |
Tejun Heo | 4c9bf4e | 2008-04-07 22:47:20 +0900 | [diff] [blame] | 251 | static bool sas_ata_qc_fill_rtf(struct ata_queued_cmd *qc) |
| 252 | { |
| 253 | struct domain_device *dev = qc->ap->private_data; |
| 254 | |
| 255 | memcpy(&qc->result_tf, &dev->sata_dev.tf, sizeof(qc->result_tf)); |
| 256 | return true; |
| 257 | } |
| 258 | |
James Bottomley | 00dd499 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 259 | static int sas_ata_hard_reset(struct ata_link *link, unsigned int *class, |
| 260 | unsigned long deadline) |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 261 | { |
James Bottomley | 00dd499 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 262 | struct ata_port *ap = link->ap; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 263 | struct domain_device *dev = ap->private_data; |
| 264 | struct sas_internal *i = |
| 265 | to_sas_internal(dev->port->ha->core.shost->transportt); |
James Bottomley | a29c051 | 2008-02-23 23:38:44 -0600 | [diff] [blame] | 266 | int res = TMF_RESP_FUNC_FAILED; |
James Bottomley | 00dd499 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 267 | int ret = 0; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 268 | |
| 269 | if (i->dft->lldd_I_T_nexus_reset) |
| 270 | res = i->dft->lldd_I_T_nexus_reset(dev); |
| 271 | |
James Bottomley | 00dd499 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 272 | if (res != TMF_RESP_FUNC_COMPLETE) { |
Harvey Harrison | cadbd4a | 2008-07-03 23:47:27 -0700 | [diff] [blame] | 273 | SAS_DPRINTK("%s: Unable to reset I T nexus?\n", __func__); |
James Bottomley | 00dd499 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 274 | ret = -EAGAIN; |
| 275 | } |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 276 | |
| 277 | switch (dev->sata_dev.command_set) { |
| 278 | case ATA_COMMAND_SET: |
Harvey Harrison | cadbd4a | 2008-07-03 23:47:27 -0700 | [diff] [blame] | 279 | SAS_DPRINTK("%s: Found ATA device.\n", __func__); |
James Bottomley | 00dd499 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 280 | *class = ATA_DEV_ATA; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 281 | break; |
| 282 | case ATAPI_COMMAND_SET: |
Harvey Harrison | cadbd4a | 2008-07-03 23:47:27 -0700 | [diff] [blame] | 283 | SAS_DPRINTK("%s: Found ATAPI device.\n", __func__); |
James Bottomley | 00dd499 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 284 | *class = ATA_DEV_ATAPI; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 285 | break; |
| 286 | default: |
| 287 | SAS_DPRINTK("%s: Unknown SATA command set: %d.\n", |
Harvey Harrison | cadbd4a | 2008-07-03 23:47:27 -0700 | [diff] [blame] | 288 | __func__, |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 289 | dev->sata_dev.command_set); |
James Bottomley | 00dd499 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 290 | *class = ATA_DEV_UNKNOWN; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 291 | break; |
| 292 | } |
| 293 | |
| 294 | ap->cbl = ATA_CBL_SATA; |
James Bottomley | 00dd499 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 295 | return ret; |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 296 | } |
| 297 | |
Dave Jiang | 1ca1e43 | 2011-05-24 13:18:04 -0700 | [diff] [blame] | 298 | static int sas_ata_soft_reset(struct ata_link *link, unsigned int *class, |
| 299 | unsigned long deadline) |
| 300 | { |
| 301 | struct ata_port *ap = link->ap; |
| 302 | struct domain_device *dev = ap->private_data; |
| 303 | struct sas_internal *i = |
| 304 | to_sas_internal(dev->port->ha->core.shost->transportt); |
| 305 | int res = TMF_RESP_FUNC_FAILED; |
| 306 | int ret = 0; |
| 307 | |
| 308 | if (i->dft->lldd_ata_soft_reset) |
| 309 | res = i->dft->lldd_ata_soft_reset(dev); |
| 310 | |
| 311 | if (res != TMF_RESP_FUNC_COMPLETE) { |
| 312 | SAS_DPRINTK("%s: Unable to soft reset\n", __func__); |
| 313 | ret = -EAGAIN; |
| 314 | } |
| 315 | |
| 316 | switch (dev->sata_dev.command_set) { |
| 317 | case ATA_COMMAND_SET: |
| 318 | SAS_DPRINTK("%s: Found ATA device.\n", __func__); |
| 319 | *class = ATA_DEV_ATA; |
| 320 | break; |
| 321 | case ATAPI_COMMAND_SET: |
| 322 | SAS_DPRINTK("%s: Found ATAPI device.\n", __func__); |
| 323 | *class = ATA_DEV_ATAPI; |
| 324 | break; |
| 325 | default: |
| 326 | SAS_DPRINTK("%s: Unknown SATA command set: %d.\n", |
| 327 | __func__, dev->sata_dev.command_set); |
| 328 | *class = ATA_DEV_UNKNOWN; |
| 329 | break; |
| 330 | } |
| 331 | |
| 332 | ap->cbl = ATA_CBL_SATA; |
| 333 | return ret; |
| 334 | } |
| 335 | |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 336 | static void sas_ata_post_internal(struct ata_queued_cmd *qc) |
| 337 | { |
| 338 | if (qc->flags & ATA_QCFLAG_FAILED) |
| 339 | qc->err_mask |= AC_ERR_OTHER; |
| 340 | |
Darrick J. Wong | 1c50dc8 | 2007-01-30 01:18:41 -0800 | [diff] [blame] | 341 | if (qc->err_mask) { |
| 342 | /* |
| 343 | * Find the sas_task and kill it. By this point, |
| 344 | * libata has decided to kill the qc, so we needn't |
| 345 | * bother with sas_ata_task_done. But we still |
| 346 | * ought to abort the task. |
| 347 | */ |
| 348 | struct sas_task *task = qc->lldd_task; |
Darrick J. Wong | 3a2755a | 2007-01-30 01:18:58 -0800 | [diff] [blame] | 349 | unsigned long flags; |
Darrick J. Wong | 1c50dc8 | 2007-01-30 01:18:41 -0800 | [diff] [blame] | 350 | |
| 351 | qc->lldd_task = NULL; |
| 352 | if (task) { |
Darrick J. Wong | 3a2755a | 2007-01-30 01:18:58 -0800 | [diff] [blame] | 353 | /* Should this be a AT(API) device reset? */ |
| 354 | spin_lock_irqsave(&task->task_state_lock, flags); |
| 355 | task->task_state_flags |= SAS_TASK_NEED_DEV_RESET; |
| 356 | spin_unlock_irqrestore(&task->task_state_lock, flags); |
| 357 | |
Darrick J. Wong | 1c50dc8 | 2007-01-30 01:18:41 -0800 | [diff] [blame] | 358 | task->uldd_task = NULL; |
| 359 | __sas_task_abort(task); |
| 360 | } |
Darrick J. Wong | 1c50dc8 | 2007-01-30 01:18:41 -0800 | [diff] [blame] | 361 | } |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 362 | } |
| 363 | |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 364 | static struct ata_port_operations sas_sata_ops = { |
James Bottomley | 00dd499 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 365 | .prereset = ata_std_prereset, |
Dave Jiang | 1ca1e43 | 2011-05-24 13:18:04 -0700 | [diff] [blame] | 366 | .softreset = sas_ata_soft_reset, |
James Bottomley | 00dd499 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 367 | .hardreset = sas_ata_hard_reset, |
| 368 | .postreset = ata_std_postreset, |
| 369 | .error_handler = ata_std_error_handler, |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 370 | .post_internal_cmd = sas_ata_post_internal, |
David Milburn | f0ad30d | 2010-09-03 17:13:03 -0500 | [diff] [blame] | 371 | .qc_defer = ata_std_qc_defer, |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 372 | .qc_prep = ata_noop_qc_prep, |
| 373 | .qc_issue = sas_ata_qc_issue, |
Tejun Heo | 4c9bf4e | 2008-04-07 22:47:20 +0900 | [diff] [blame] | 374 | .qc_fill_rtf = sas_ata_qc_fill_rtf, |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 375 | .port_start = ata_sas_port_start, |
| 376 | .port_stop = ata_sas_port_stop, |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 377 | }; |
| 378 | |
| 379 | static struct ata_port_info sata_port_info = { |
Sergei Shtylyov | 9cbe056 | 2011-02-04 22:05:48 +0300 | [diff] [blame] | 380 | .flags = ATA_FLAG_SATA | ATA_FLAG_PIO_DMA | ATA_FLAG_NCQ, |
Sergei Shtylyov | 0f2e033 | 2011-01-21 20:32:01 +0300 | [diff] [blame] | 381 | .pio_mask = ATA_PIO4, |
| 382 | .mwdma_mask = ATA_MWDMA2, |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 383 | .udma_mask = ATA_UDMA6, |
| 384 | .port_ops = &sas_sata_ops |
| 385 | }; |
| 386 | |
| 387 | int sas_ata_init_host_and_port(struct domain_device *found_dev, |
| 388 | struct scsi_target *starget) |
| 389 | { |
| 390 | struct Scsi_Host *shost = dev_to_shost(&starget->dev); |
| 391 | struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost); |
| 392 | struct ata_port *ap; |
| 393 | |
| 394 | ata_host_init(&found_dev->sata_dev.ata_host, |
Jeff Garzik | 1d1bbee | 2007-07-26 09:28:37 -0400 | [diff] [blame] | 395 | ha->dev, |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 396 | sata_port_info.flags, |
| 397 | &sas_sata_ops); |
| 398 | ap = ata_sas_port_alloc(&found_dev->sata_dev.ata_host, |
| 399 | &sata_port_info, |
| 400 | shost); |
| 401 | if (!ap) { |
| 402 | SAS_DPRINTK("ata_sas_port_alloc failed.\n"); |
| 403 | return -ENODEV; |
| 404 | } |
| 405 | |
| 406 | ap->private_data = found_dev; |
| 407 | ap->cbl = ATA_CBL_SATA; |
| 408 | ap->scsi_host = shost; |
| 409 | found_dev->sata_dev.ap = ap; |
| 410 | |
| 411 | return 0; |
| 412 | } |
Darrick J. Wong | 3a2755a | 2007-01-30 01:18:58 -0800 | [diff] [blame] | 413 | |
| 414 | void sas_ata_task_abort(struct sas_task *task) |
| 415 | { |
| 416 | struct ata_queued_cmd *qc = task->uldd_task; |
| 417 | struct completion *waiting; |
| 418 | |
| 419 | /* Bounce SCSI-initiated commands to the SCSI EH */ |
| 420 | if (qc->scsicmd) { |
James Bottomley | 1b4d0d8 | 2010-05-13 09:31:54 -0500 | [diff] [blame] | 421 | struct request_queue *q = qc->scsicmd->device->request_queue; |
| 422 | unsigned long flags; |
| 423 | |
Tejun Heo | 70b25f8 | 2010-04-15 09:00:08 +0900 | [diff] [blame] | 424 | spin_lock_irqsave(q->queue_lock, flags); |
Jens Axboe | 242f9dc | 2008-09-14 05:55:09 -0700 | [diff] [blame] | 425 | blk_abort_request(qc->scsicmd->request); |
Tejun Heo | 70b25f8 | 2010-04-15 09:00:08 +0900 | [diff] [blame] | 426 | spin_unlock_irqrestore(q->queue_lock, flags); |
Darrick J. Wong | 3a2755a | 2007-01-30 01:18:58 -0800 | [diff] [blame] | 427 | scsi_schedule_eh(qc->scsicmd->device->host); |
| 428 | return; |
| 429 | } |
| 430 | |
| 431 | /* Internal command, fake a timeout and complete. */ |
| 432 | qc->flags &= ~ATA_QCFLAG_ACTIVE; |
| 433 | qc->flags |= ATA_QCFLAG_FAILED; |
| 434 | qc->err_mask |= AC_ERR_TIMEOUT; |
| 435 | waiting = qc->private_data; |
| 436 | complete(waiting); |
| 437 | } |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 438 | |
| 439 | static void sas_task_timedout(unsigned long _task) |
| 440 | { |
| 441 | struct sas_task *task = (void *) _task; |
| 442 | unsigned long flags; |
| 443 | |
| 444 | spin_lock_irqsave(&task->task_state_lock, flags); |
| 445 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) |
| 446 | task->task_state_flags |= SAS_TASK_STATE_ABORTED; |
| 447 | spin_unlock_irqrestore(&task->task_state_lock, flags); |
| 448 | |
| 449 | complete(&task->completion); |
| 450 | } |
| 451 | |
| 452 | static void sas_disc_task_done(struct sas_task *task) |
| 453 | { |
| 454 | if (!del_timer(&task->timer)) |
| 455 | return; |
| 456 | complete(&task->completion); |
| 457 | } |
| 458 | |
| 459 | #define SAS_DEV_TIMEOUT 10 |
| 460 | |
| 461 | /** |
| 462 | * sas_execute_task -- Basic task processing for discovery |
| 463 | * @task: the task to be executed |
| 464 | * @buffer: pointer to buffer to do I/O |
| 465 | * @size: size of @buffer |
Jeff Garzik | 1d1bbee | 2007-07-26 09:28:37 -0400 | [diff] [blame] | 466 | * @dma_dir: DMA direction. DMA_xxx |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 467 | */ |
| 468 | static int sas_execute_task(struct sas_task *task, void *buffer, int size, |
Jeff Garzik | 1d1bbee | 2007-07-26 09:28:37 -0400 | [diff] [blame] | 469 | enum dma_data_direction dma_dir) |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 470 | { |
| 471 | int res = 0; |
| 472 | struct scatterlist *scatter = NULL; |
| 473 | struct task_status_struct *ts = &task->task_status; |
| 474 | int num_scatter = 0; |
| 475 | int retries = 0; |
| 476 | struct sas_internal *i = |
| 477 | to_sas_internal(task->dev->port->ha->core.shost->transportt); |
| 478 | |
Jeff Garzik | 1d1bbee | 2007-07-26 09:28:37 -0400 | [diff] [blame] | 479 | if (dma_dir != DMA_NONE) { |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 480 | scatter = kzalloc(sizeof(*scatter), GFP_KERNEL); |
| 481 | if (!scatter) |
| 482 | goto out; |
| 483 | |
| 484 | sg_init_one(scatter, buffer, size); |
| 485 | num_scatter = 1; |
| 486 | } |
| 487 | |
| 488 | task->task_proto = task->dev->tproto; |
| 489 | task->scatter = scatter; |
| 490 | task->num_scatter = num_scatter; |
| 491 | task->total_xfer_len = size; |
Jeff Garzik | 1d1bbee | 2007-07-26 09:28:37 -0400 | [diff] [blame] | 492 | task->data_dir = dma_dir; |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 493 | task->task_done = sas_disc_task_done; |
Jeff Garzik | 1d1bbee | 2007-07-26 09:28:37 -0400 | [diff] [blame] | 494 | if (dma_dir != DMA_NONE && |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 495 | sas_protocol_ata(task->task_proto)) { |
Jeff Garzik | 1d1bbee | 2007-07-26 09:28:37 -0400 | [diff] [blame] | 496 | task->num_scatter = dma_map_sg(task->dev->port->ha->dev, |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 497 | task->scatter, |
| 498 | task->num_scatter, |
| 499 | task->data_dir); |
| 500 | } |
| 501 | |
| 502 | for (retries = 0; retries < 5; retries++) { |
| 503 | task->task_state_flags = SAS_TASK_STATE_PENDING; |
| 504 | init_completion(&task->completion); |
| 505 | |
| 506 | task->timer.data = (unsigned long) task; |
| 507 | task->timer.function = sas_task_timedout; |
| 508 | task->timer.expires = jiffies + SAS_DEV_TIMEOUT*HZ; |
| 509 | add_timer(&task->timer); |
| 510 | |
| 511 | res = i->dft->lldd_execute_task(task, 1, GFP_KERNEL); |
| 512 | if (res) { |
| 513 | del_timer(&task->timer); |
| 514 | SAS_DPRINTK("executing SAS discovery task failed:%d\n", |
| 515 | res); |
| 516 | goto ex_err; |
| 517 | } |
| 518 | wait_for_completion(&task->completion); |
James Bottomley | 32e8ae3 | 2007-12-30 12:37:31 -0600 | [diff] [blame] | 519 | res = -ECOMM; |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 520 | if (task->task_state_flags & SAS_TASK_STATE_ABORTED) { |
| 521 | int res2; |
| 522 | SAS_DPRINTK("task aborted, flags:0x%x\n", |
| 523 | task->task_state_flags); |
| 524 | res2 = i->dft->lldd_abort_task(task); |
| 525 | SAS_DPRINTK("came back from abort task\n"); |
| 526 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) { |
| 527 | if (res2 == TMF_RESP_FUNC_COMPLETE) |
| 528 | continue; /* Retry the task */ |
| 529 | else |
| 530 | goto ex_err; |
| 531 | } |
| 532 | } |
James Bottomley | df64d3c | 2010-07-27 15:51:13 -0500 | [diff] [blame] | 533 | if (task->task_status.stat == SAM_STAT_BUSY || |
| 534 | task->task_status.stat == SAM_STAT_TASK_SET_FULL || |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 535 | task->task_status.stat == SAS_QUEUE_FULL) { |
| 536 | SAS_DPRINTK("task: q busy, sleeping...\n"); |
| 537 | schedule_timeout_interruptible(HZ); |
James Bottomley | df64d3c | 2010-07-27 15:51:13 -0500 | [diff] [blame] | 538 | } else if (task->task_status.stat == SAM_STAT_CHECK_CONDITION) { |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 539 | struct scsi_sense_hdr shdr; |
| 540 | |
| 541 | if (!scsi_normalize_sense(ts->buf, ts->buf_valid_size, |
| 542 | &shdr)) { |
| 543 | SAS_DPRINTK("couldn't normalize sense\n"); |
| 544 | continue; |
| 545 | } |
| 546 | if ((shdr.sense_key == 6 && shdr.asc == 0x29) || |
| 547 | (shdr.sense_key == 2 && shdr.asc == 4 && |
| 548 | shdr.ascq == 1)) { |
| 549 | SAS_DPRINTK("device %016llx LUN: %016llx " |
| 550 | "powering up or not ready yet, " |
| 551 | "sleeping...\n", |
| 552 | SAS_ADDR(task->dev->sas_addr), |
| 553 | SAS_ADDR(task->ssp_task.LUN)); |
| 554 | |
| 555 | schedule_timeout_interruptible(5*HZ); |
| 556 | } else if (shdr.sense_key == 1) { |
| 557 | res = 0; |
| 558 | break; |
| 559 | } else if (shdr.sense_key == 5) { |
| 560 | break; |
| 561 | } else { |
| 562 | SAS_DPRINTK("dev %016llx LUN: %016llx " |
| 563 | "sense key:0x%x ASC:0x%x ASCQ:0x%x" |
| 564 | "\n", |
| 565 | SAS_ADDR(task->dev->sas_addr), |
| 566 | SAS_ADDR(task->ssp_task.LUN), |
| 567 | shdr.sense_key, |
| 568 | shdr.asc, shdr.ascq); |
| 569 | } |
| 570 | } else if (task->task_status.resp != SAS_TASK_COMPLETE || |
James Bottomley | df64d3c | 2010-07-27 15:51:13 -0500 | [diff] [blame] | 571 | task->task_status.stat != SAM_STAT_GOOD) { |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 572 | SAS_DPRINTK("task finished with resp:0x%x, " |
| 573 | "stat:0x%x\n", |
| 574 | task->task_status.resp, |
| 575 | task->task_status.stat); |
| 576 | goto ex_err; |
| 577 | } else { |
| 578 | res = 0; |
| 579 | break; |
| 580 | } |
| 581 | } |
| 582 | ex_err: |
Jeff Garzik | 1d1bbee | 2007-07-26 09:28:37 -0400 | [diff] [blame] | 583 | if (dma_dir != DMA_NONE) { |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 584 | if (sas_protocol_ata(task->task_proto)) |
Jeff Garzik | 1d1bbee | 2007-07-26 09:28:37 -0400 | [diff] [blame] | 585 | dma_unmap_sg(task->dev->port->ha->dev, |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 586 | task->scatter, task->num_scatter, |
| 587 | task->data_dir); |
| 588 | kfree(scatter); |
| 589 | } |
| 590 | out: |
| 591 | return res; |
| 592 | } |
| 593 | |
| 594 | /* ---------- SATA ---------- */ |
| 595 | |
| 596 | static void sas_get_ata_command_set(struct domain_device *dev) |
| 597 | { |
| 598 | struct dev_to_host_fis *fis = |
| 599 | (struct dev_to_host_fis *) dev->frame_rcvd; |
| 600 | |
| 601 | if ((fis->sector_count == 1 && /* ATA */ |
| 602 | fis->lbal == 1 && |
| 603 | fis->lbam == 0 && |
| 604 | fis->lbah == 0 && |
| 605 | fis->device == 0) |
| 606 | || |
| 607 | (fis->sector_count == 0 && /* CE-ATA (mATA) */ |
| 608 | fis->lbal == 0 && |
| 609 | fis->lbam == 0xCE && |
| 610 | fis->lbah == 0xAA && |
| 611 | (fis->device & ~0x10) == 0)) |
| 612 | |
| 613 | dev->sata_dev.command_set = ATA_COMMAND_SET; |
| 614 | |
| 615 | else if ((fis->interrupt_reason == 1 && /* ATAPI */ |
| 616 | fis->lbal == 1 && |
| 617 | fis->byte_count_low == 0x14 && |
| 618 | fis->byte_count_high == 0xEB && |
| 619 | (fis->device & ~0x10) == 0)) |
| 620 | |
| 621 | dev->sata_dev.command_set = ATAPI_COMMAND_SET; |
| 622 | |
| 623 | else if ((fis->sector_count == 1 && /* SEMB */ |
| 624 | fis->lbal == 1 && |
| 625 | fis->lbam == 0x3C && |
| 626 | fis->lbah == 0xC3 && |
| 627 | fis->device == 0) |
| 628 | || |
| 629 | (fis->interrupt_reason == 1 && /* SATA PM */ |
| 630 | fis->lbal == 1 && |
| 631 | fis->byte_count_low == 0x69 && |
| 632 | fis->byte_count_high == 0x96 && |
| 633 | (fis->device & ~0x10) == 0)) |
| 634 | |
| 635 | /* Treat it as a superset? */ |
| 636 | dev->sata_dev.command_set = ATAPI_COMMAND_SET; |
| 637 | } |
| 638 | |
| 639 | /** |
| 640 | * sas_issue_ata_cmd -- Basic SATA command processing for discovery |
| 641 | * @dev: the device to send the command to |
| 642 | * @command: the command register |
| 643 | * @features: the features register |
| 644 | * @buffer: pointer to buffer to do I/O |
| 645 | * @size: size of @buffer |
Jeff Garzik | 1d1bbee | 2007-07-26 09:28:37 -0400 | [diff] [blame] | 646 | * @dma_dir: DMA direction. DMA_xxx |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 647 | */ |
| 648 | static int sas_issue_ata_cmd(struct domain_device *dev, u8 command, |
| 649 | u8 features, void *buffer, int size, |
Jeff Garzik | 1d1bbee | 2007-07-26 09:28:37 -0400 | [diff] [blame] | 650 | enum dma_data_direction dma_dir) |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 651 | { |
| 652 | int res = 0; |
| 653 | struct sas_task *task; |
| 654 | struct dev_to_host_fis *d2h_fis = (struct dev_to_host_fis *) |
| 655 | &dev->frame_rcvd[0]; |
| 656 | |
| 657 | res = -ENOMEM; |
| 658 | task = sas_alloc_task(GFP_KERNEL); |
| 659 | if (!task) |
| 660 | goto out; |
| 661 | |
| 662 | task->dev = dev; |
| 663 | |
| 664 | task->ata_task.fis.fis_type = 0x27; |
| 665 | task->ata_task.fis.command = command; |
| 666 | task->ata_task.fis.features = features; |
| 667 | task->ata_task.fis.device = d2h_fis->device; |
| 668 | task->ata_task.retry_count = 1; |
| 669 | |
Jeff Garzik | 1d1bbee | 2007-07-26 09:28:37 -0400 | [diff] [blame] | 670 | res = sas_execute_task(task, buffer, size, dma_dir); |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 671 | |
| 672 | sas_free_task(task); |
| 673 | out: |
| 674 | return res; |
| 675 | } |
| 676 | |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 677 | #define ATA_IDENTIFY_DEV 0xEC |
| 678 | #define ATA_IDENTIFY_PACKET_DEV 0xA1 |
| 679 | #define ATA_SET_FEATURES 0xEF |
| 680 | #define ATA_FEATURE_PUP_STBY_SPIN_UP 0x07 |
| 681 | |
| 682 | /** |
| 683 | * sas_discover_sata_dev -- discover a STP/SATA device (SATA_DEV) |
| 684 | * @dev: STP/SATA device of interest (ATA/ATAPI) |
| 685 | * |
| 686 | * The LLDD has already been notified of this device, so that we can |
| 687 | * send FISes to it. Here we try to get IDENTIFY DEVICE or IDENTIFY |
| 688 | * PACKET DEVICE, if ATAPI device, so that the LLDD can fine-tune its |
| 689 | * performance for this device. |
| 690 | */ |
| 691 | static int sas_discover_sata_dev(struct domain_device *dev) |
| 692 | { |
| 693 | int res; |
| 694 | __le16 *identify_x; |
| 695 | u8 command; |
| 696 | |
| 697 | identify_x = kzalloc(512, GFP_KERNEL); |
| 698 | if (!identify_x) |
| 699 | return -ENOMEM; |
| 700 | |
| 701 | if (dev->sata_dev.command_set == ATA_COMMAND_SET) { |
| 702 | dev->sata_dev.identify_device = identify_x; |
| 703 | command = ATA_IDENTIFY_DEV; |
| 704 | } else { |
| 705 | dev->sata_dev.identify_packet_device = identify_x; |
| 706 | command = ATA_IDENTIFY_PACKET_DEV; |
| 707 | } |
| 708 | |
| 709 | res = sas_issue_ata_cmd(dev, command, 0, identify_x, 512, |
Jeff Garzik | 1d1bbee | 2007-07-26 09:28:37 -0400 | [diff] [blame] | 710 | DMA_FROM_DEVICE); |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 711 | if (res) |
| 712 | goto out_err; |
| 713 | |
| 714 | /* lives on the media? */ |
| 715 | if (le16_to_cpu(identify_x[0]) & 4) { |
| 716 | /* incomplete response */ |
| 717 | SAS_DPRINTK("sending SET FEATURE/PUP_STBY_SPIN_UP to " |
| 718 | "dev %llx\n", SAS_ADDR(dev->sas_addr)); |
Al Viro | 17b7a8d | 2008-04-16 23:27:45 +0100 | [diff] [blame] | 719 | if (!(identify_x[83] & cpu_to_le16(1<<6))) |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 720 | goto cont1; |
| 721 | res = sas_issue_ata_cmd(dev, ATA_SET_FEATURES, |
| 722 | ATA_FEATURE_PUP_STBY_SPIN_UP, |
Jeff Garzik | 1d1bbee | 2007-07-26 09:28:37 -0400 | [diff] [blame] | 723 | NULL, 0, DMA_NONE); |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 724 | if (res) |
| 725 | goto cont1; |
| 726 | |
| 727 | schedule_timeout_interruptible(5*HZ); /* More time? */ |
| 728 | res = sas_issue_ata_cmd(dev, command, 0, identify_x, 512, |
Jeff Garzik | 1d1bbee | 2007-07-26 09:28:37 -0400 | [diff] [blame] | 729 | DMA_FROM_DEVICE); |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 730 | if (res) |
| 731 | goto out_err; |
| 732 | } |
| 733 | cont1: |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 734 | /* XXX Hint: register this SATA device with SATL. |
| 735 | When this returns, dev->sata_dev->lu is alive and |
| 736 | present. |
| 737 | sas_satl_register_dev(dev); |
| 738 | */ |
| 739 | |
| 740 | sas_fill_in_rphy(dev, dev->rphy); |
| 741 | |
| 742 | return 0; |
| 743 | out_err: |
| 744 | dev->sata_dev.identify_packet_device = NULL; |
| 745 | dev->sata_dev.identify_device = NULL; |
| 746 | kfree(identify_x); |
| 747 | return res; |
| 748 | } |
| 749 | |
| 750 | static int sas_discover_sata_pm(struct domain_device *dev) |
| 751 | { |
| 752 | return -ENODEV; |
| 753 | } |
| 754 | |
| 755 | /** |
| 756 | * sas_discover_sata -- discover an STP/SATA domain device |
| 757 | * @dev: pointer to struct domain_device of interest |
| 758 | * |
| 759 | * First we notify the LLDD of this device, so we can send frames to |
| 760 | * it. Then depending on the type of device we call the appropriate |
| 761 | * discover functions. Once device discover is done, we notify the |
| 762 | * LLDD so that it can fine-tune its parameters for the device, by |
| 763 | * removing it and then adding it. That is, the second time around, |
| 764 | * the driver would have certain fields, that it is looking at, set. |
| 765 | * Finally we initialize the kobj so that the device can be added to |
| 766 | * the system at registration time. Devices directly attached to a HA |
| 767 | * port, have no parents. All other devices do, and should have their |
| 768 | * "parent" pointer set appropriately before calling this function. |
| 769 | */ |
| 770 | int sas_discover_sata(struct domain_device *dev) |
| 771 | { |
| 772 | int res; |
| 773 | |
| 774 | sas_get_ata_command_set(dev); |
| 775 | |
| 776 | res = sas_notify_lldd_dev_found(dev); |
| 777 | if (res) |
| 778 | return res; |
| 779 | |
| 780 | switch (dev->dev_type) { |
| 781 | case SATA_DEV: |
| 782 | res = sas_discover_sata_dev(dev); |
| 783 | break; |
| 784 | case SATA_PM: |
| 785 | res = sas_discover_sata_pm(dev); |
| 786 | break; |
| 787 | default: |
| 788 | break; |
| 789 | } |
| 790 | sas_notify_lldd_dev_gone(dev); |
| 791 | if (!res) { |
| 792 | sas_notify_lldd_dev_found(dev); |
| 793 | res = sas_rphy_add(dev->rphy); |
| 794 | } |
| 795 | |
| 796 | return res; |
| 797 | } |
James Bottomley | 00dd499 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 798 | |
| 799 | void sas_ata_strategy_handler(struct Scsi_Host *shost) |
| 800 | { |
| 801 | struct scsi_device *sdev; |
| 802 | |
| 803 | shost_for_each_device(sdev, shost) { |
| 804 | struct domain_device *ddev = sdev_to_domain_dev(sdev); |
| 805 | struct ata_port *ap = ddev->sata_dev.ap; |
| 806 | |
| 807 | if (!dev_is_sata(ddev)) |
| 808 | continue; |
James Bottomley | c299190 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 809 | |
James Bottomley | 00dd499 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 810 | ata_port_printk(ap, KERN_DEBUG, "sas eh calling libata port error handler"); |
| 811 | ata_scsi_port_error_handler(shost, ap); |
| 812 | } |
| 813 | } |
| 814 | |
| 815 | int sas_ata_timed_out(struct scsi_cmnd *cmd, struct sas_task *task, |
| 816 | enum blk_eh_timer_return *rtn) |
| 817 | { |
| 818 | struct domain_device *ddev = cmd_to_domain_dev(cmd); |
| 819 | |
| 820 | if (!dev_is_sata(ddev) || task) |
| 821 | return 0; |
| 822 | |
| 823 | /* we're a sata device with no task, so this must be a libata |
| 824 | * eh timeout. Ideally should hook into libata timeout |
| 825 | * handling, but there's no point, it just wants to activate |
| 826 | * the eh thread */ |
| 827 | *rtn = BLK_EH_NOT_HANDLED; |
| 828 | return 1; |
| 829 | } |
| 830 | |
| 831 | int sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q, |
| 832 | struct list_head *done_q) |
| 833 | { |
| 834 | int rtn = 0; |
| 835 | struct scsi_cmnd *cmd, *n; |
| 836 | struct ata_port *ap; |
| 837 | |
| 838 | do { |
| 839 | LIST_HEAD(sata_q); |
| 840 | |
| 841 | ap = NULL; |
James Bottomley | c299190 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 842 | |
James Bottomley | 00dd499 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 843 | list_for_each_entry_safe(cmd, n, work_q, eh_entry) { |
| 844 | struct domain_device *ddev = cmd_to_domain_dev(cmd); |
| 845 | |
| 846 | if (!dev_is_sata(ddev) || TO_SAS_TASK(cmd)) |
| 847 | continue; |
James Bottomley | c299190 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 848 | if (ap && ap != ddev->sata_dev.ap) |
James Bottomley | 00dd499 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 849 | continue; |
| 850 | ap = ddev->sata_dev.ap; |
| 851 | rtn = 1; |
| 852 | list_move(&cmd->eh_entry, &sata_q); |
| 853 | } |
| 854 | |
| 855 | if (!list_empty(&sata_q)) { |
James Bottomley | c299190 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 856 | ata_port_printk(ap, KERN_DEBUG, "sas eh calling libata cmd error handler\n"); |
James Bottomley | 00dd499 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 857 | ata_scsi_cmd_error_handler(shost, ap, &sata_q); |
James Bottomley | a82058a | 2011-03-10 17:13:18 -0600 | [diff] [blame] | 858 | /* |
| 859 | * ata's error handler may leave the cmd on the list |
| 860 | * so make sure they don't remain on a stack list |
| 861 | * about to go out of scope. |
| 862 | * |
| 863 | * This looks strange, since the commands are |
| 864 | * now part of no list, but the next error |
| 865 | * action will be ata_port_error_handler() |
| 866 | * which takes no list and sweeps them up |
| 867 | * anyway from the ata tag array. |
| 868 | */ |
| 869 | while (!list_empty(&sata_q)) |
| 870 | list_del_init(sata_q.next); |
James Bottomley | 00dd499 | 2011-01-23 09:44:12 -0600 | [diff] [blame] | 871 | } |
| 872 | } while (ap); |
| 873 | |
| 874 | return rtn; |
| 875 | } |