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