James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Aic94xx Task Management Functions |
| 3 | * |
| 4 | * Copyright (C) 2005 Adaptec, Inc. All rights reserved. |
| 5 | * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com> |
| 6 | * |
| 7 | * This file is licensed under GPLv2. |
| 8 | * |
| 9 | * This file is part of the aic94xx driver. |
| 10 | * |
| 11 | * The aic94xx driver is free software; you can redistribute it and/or |
| 12 | * modify it under the terms of the GNU General Public License as |
| 13 | * published by the Free Software Foundation; version 2 of the |
| 14 | * License. |
| 15 | * |
| 16 | * The aic94xx driver is distributed in the hope that it will be useful, |
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 19 | * General Public License for more details. |
| 20 | * |
| 21 | * You should have received a copy of the GNU General Public License |
| 22 | * along with the aic94xx driver; if not, write to the Free Software |
| 23 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 24 | * |
| 25 | */ |
| 26 | |
| 27 | #include <linux/spinlock.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 28 | #include <linux/gfp.h> |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 29 | #include "aic94xx.h" |
| 30 | #include "aic94xx_sas.h" |
| 31 | #include "aic94xx_hwi.h" |
| 32 | |
| 33 | /* ---------- Internal enqueue ---------- */ |
| 34 | |
| 35 | static int asd_enqueue_internal(struct asd_ascb *ascb, |
| 36 | void (*tasklet_complete)(struct asd_ascb *, |
| 37 | struct done_list_struct *), |
| 38 | void (*timed_out)(unsigned long)) |
| 39 | { |
| 40 | int res; |
| 41 | |
| 42 | ascb->tasklet_complete = tasklet_complete; |
| 43 | ascb->uldd_timer = 1; |
| 44 | |
| 45 | ascb->timer.data = (unsigned long) ascb; |
| 46 | ascb->timer.function = timed_out; |
| 47 | ascb->timer.expires = jiffies + AIC94XX_SCB_TIMEOUT; |
| 48 | |
| 49 | add_timer(&ascb->timer); |
| 50 | |
| 51 | res = asd_post_ascb_list(ascb->ha, ascb, 1); |
| 52 | if (unlikely(res)) |
| 53 | del_timer(&ascb->timer); |
| 54 | return res; |
| 55 | } |
| 56 | |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 57 | /* ---------- CLEAR NEXUS ---------- */ |
| 58 | |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 59 | struct tasklet_completion_status { |
| 60 | int dl_opcode; |
| 61 | int tmf_state; |
| 62 | u8 tag_valid:1; |
| 63 | __be16 tag; |
| 64 | }; |
| 65 | |
| 66 | #define DECLARE_TCS(tcs) \ |
| 67 | struct tasklet_completion_status tcs = { \ |
| 68 | .dl_opcode = 0, \ |
| 69 | .tmf_state = 0, \ |
| 70 | .tag_valid = 0, \ |
| 71 | .tag = 0, \ |
| 72 | } |
| 73 | |
| 74 | |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 75 | static void asd_clear_nexus_tasklet_complete(struct asd_ascb *ascb, |
| 76 | struct done_list_struct *dl) |
| 77 | { |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 78 | struct tasklet_completion_status *tcs = ascb->uldd_task; |
Harvey Harrison | cadbd4a | 2008-07-03 23:47:27 -0700 | [diff] [blame] | 79 | ASD_DPRINTK("%s: here\n", __func__); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 80 | if (!del_timer(&ascb->timer)) { |
Harvey Harrison | cadbd4a | 2008-07-03 23:47:27 -0700 | [diff] [blame] | 81 | ASD_DPRINTK("%s: couldn't delete timer\n", __func__); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 82 | return; |
| 83 | } |
Harvey Harrison | cadbd4a | 2008-07-03 23:47:27 -0700 | [diff] [blame] | 84 | ASD_DPRINTK("%s: opcode: 0x%x\n", __func__, dl->opcode); |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 85 | tcs->dl_opcode = dl->opcode; |
| 86 | complete(ascb->completion); |
| 87 | asd_ascb_free(ascb); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 88 | } |
| 89 | |
| 90 | static void asd_clear_nexus_timedout(unsigned long data) |
| 91 | { |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 92 | struct asd_ascb *ascb = (void *)data; |
| 93 | struct tasklet_completion_status *tcs = ascb->uldd_task; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 94 | |
Harvey Harrison | cadbd4a | 2008-07-03 23:47:27 -0700 | [diff] [blame] | 95 | ASD_DPRINTK("%s: here\n", __func__); |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 96 | tcs->dl_opcode = TMF_RESP_FUNC_FAILED; |
| 97 | complete(ascb->completion); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 98 | } |
| 99 | |
| 100 | #define CLEAR_NEXUS_PRE \ |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 101 | struct asd_ascb *ascb; \ |
| 102 | struct scb *scb; \ |
| 103 | int res; \ |
| 104 | DECLARE_COMPLETION_ONSTACK(completion); \ |
| 105 | DECLARE_TCS(tcs); \ |
| 106 | \ |
Harvey Harrison | cadbd4a | 2008-07-03 23:47:27 -0700 | [diff] [blame] | 107 | ASD_DPRINTK("%s: PRE\n", __func__); \ |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 108 | res = 1; \ |
| 109 | ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL); \ |
| 110 | if (!ascb) \ |
| 111 | return -ENOMEM; \ |
| 112 | \ |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 113 | ascb->completion = &completion; \ |
| 114 | ascb->uldd_task = &tcs; \ |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 115 | scb = ascb->scb; \ |
| 116 | scb->header.opcode = CLEAR_NEXUS |
| 117 | |
| 118 | #define CLEAR_NEXUS_POST \ |
Harvey Harrison | cadbd4a | 2008-07-03 23:47:27 -0700 | [diff] [blame] | 119 | ASD_DPRINTK("%s: POST\n", __func__); \ |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 120 | res = asd_enqueue_internal(ascb, asd_clear_nexus_tasklet_complete, \ |
| 121 | asd_clear_nexus_timedout); \ |
| 122 | if (res) \ |
| 123 | goto out_err; \ |
Harvey Harrison | cadbd4a | 2008-07-03 23:47:27 -0700 | [diff] [blame] | 124 | ASD_DPRINTK("%s: clear nexus posted, waiting...\n", __func__); \ |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 125 | wait_for_completion(&completion); \ |
| 126 | res = tcs.dl_opcode; \ |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 127 | if (res == TC_NO_ERROR) \ |
| 128 | res = TMF_RESP_FUNC_COMPLETE; \ |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 129 | return res; \ |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 130 | out_err: \ |
| 131 | asd_ascb_free(ascb); \ |
| 132 | return res |
| 133 | |
| 134 | int asd_clear_nexus_ha(struct sas_ha_struct *sas_ha) |
| 135 | { |
| 136 | struct asd_ha_struct *asd_ha = sas_ha->lldd_ha; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 137 | |
| 138 | CLEAR_NEXUS_PRE; |
| 139 | scb->clear_nexus.nexus = NEXUS_ADAPTER; |
| 140 | CLEAR_NEXUS_POST; |
| 141 | } |
| 142 | |
| 143 | int asd_clear_nexus_port(struct asd_sas_port *port) |
| 144 | { |
| 145 | struct asd_ha_struct *asd_ha = port->ha->lldd_ha; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 146 | |
| 147 | CLEAR_NEXUS_PRE; |
| 148 | scb->clear_nexus.nexus = NEXUS_PORT; |
| 149 | scb->clear_nexus.conn_mask = port->phy_mask; |
| 150 | CLEAR_NEXUS_POST; |
| 151 | } |
| 152 | |
James Bottomley | 63edf49 | 2008-02-23 23:37:26 -0600 | [diff] [blame] | 153 | enum clear_nexus_phase { |
| 154 | NEXUS_PHASE_PRE, |
| 155 | NEXUS_PHASE_POST, |
| 156 | NEXUS_PHASE_RESUME, |
| 157 | }; |
| 158 | |
| 159 | static int asd_clear_nexus_I_T(struct domain_device *dev, |
| 160 | enum clear_nexus_phase phase) |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 161 | { |
| 162 | struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 163 | |
| 164 | CLEAR_NEXUS_PRE; |
| 165 | scb->clear_nexus.nexus = NEXUS_I_T; |
James Bottomley | 63edf49 | 2008-02-23 23:37:26 -0600 | [diff] [blame] | 166 | switch (phase) { |
| 167 | case NEXUS_PHASE_PRE: |
| 168 | scb->clear_nexus.flags = EXEC_Q | SUSPEND_TX; |
| 169 | break; |
| 170 | case NEXUS_PHASE_POST: |
| 171 | scb->clear_nexus.flags = SEND_Q | NOTINQ; |
| 172 | break; |
| 173 | case NEXUS_PHASE_RESUME: |
| 174 | scb->clear_nexus.flags = RESUME_TX; |
| 175 | } |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 176 | scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long) |
| 177 | dev->lldd_dev); |
| 178 | CLEAR_NEXUS_POST; |
| 179 | } |
James Bottomley | 63edf49 | 2008-02-23 23:37:26 -0600 | [diff] [blame] | 180 | |
| 181 | int asd_I_T_nexus_reset(struct domain_device *dev) |
| 182 | { |
| 183 | int res, tmp_res, i; |
Dan Williams | f41a0c4 | 2011-12-21 21:33:17 -0800 | [diff] [blame] | 184 | struct sas_phy *phy = sas_get_local_phy(dev); |
James Bottomley | 63edf49 | 2008-02-23 23:37:26 -0600 | [diff] [blame] | 185 | /* Standard mandates link reset for ATA (type 0) and |
| 186 | * hard reset for SSP (type 1) */ |
James Bottomley | aa9f832 | 2013-05-07 14:44:06 -0700 | [diff] [blame] | 187 | int reset_type = (dev->dev_type == SAS_SATA_DEV || |
James Bottomley | 63edf49 | 2008-02-23 23:37:26 -0600 | [diff] [blame] | 188 | (dev->tproto & SAS_PROTOCOL_STP)) ? 0 : 1; |
| 189 | |
| 190 | asd_clear_nexus_I_T(dev, NEXUS_PHASE_PRE); |
| 191 | /* send a hard reset */ |
| 192 | ASD_DPRINTK("sending %s reset to %s\n", |
Kay Sievers | 71610f5 | 2008-12-03 22:41:36 +0100 | [diff] [blame] | 193 | reset_type ? "hard" : "soft", dev_name(&phy->dev)); |
James Bottomley | 63edf49 | 2008-02-23 23:37:26 -0600 | [diff] [blame] | 194 | res = sas_phy_reset(phy, reset_type); |
Dan Williams | 26a2e68 | 2012-01-30 21:40:45 -0800 | [diff] [blame] | 195 | if (res == TMF_RESP_FUNC_COMPLETE || res == -ENODEV) { |
James Bottomley | 63edf49 | 2008-02-23 23:37:26 -0600 | [diff] [blame] | 196 | /* wait for the maximum settle time */ |
| 197 | msleep(500); |
| 198 | /* clear all outstanding commands (keep nexus suspended) */ |
| 199 | asd_clear_nexus_I_T(dev, NEXUS_PHASE_POST); |
| 200 | } |
| 201 | for (i = 0 ; i < 3; i++) { |
| 202 | tmp_res = asd_clear_nexus_I_T(dev, NEXUS_PHASE_RESUME); |
| 203 | if (tmp_res == TC_RESUME) |
Dan Williams | f41a0c4 | 2011-12-21 21:33:17 -0800 | [diff] [blame] | 204 | goto out; |
James Bottomley | 63edf49 | 2008-02-23 23:37:26 -0600 | [diff] [blame] | 205 | msleep(500); |
| 206 | } |
| 207 | |
| 208 | /* This is a bit of a problem: the sequencer is still suspended |
| 209 | * and is refusing to resume. Hope it will resume on a bigger hammer |
| 210 | * or the disk is lost */ |
| 211 | dev_printk(KERN_ERR, &phy->dev, |
| 212 | "Failed to resume nexus after reset 0x%x\n", tmp_res); |
| 213 | |
Dan Williams | f41a0c4 | 2011-12-21 21:33:17 -0800 | [diff] [blame] | 214 | res = TMF_RESP_FUNC_FAILED; |
| 215 | out: |
| 216 | sas_put_local_phy(phy); |
| 217 | return res; |
James Bottomley | 63edf49 | 2008-02-23 23:37:26 -0600 | [diff] [blame] | 218 | } |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 219 | |
| 220 | static int asd_clear_nexus_I_T_L(struct domain_device *dev, u8 *lun) |
| 221 | { |
| 222 | struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 223 | |
| 224 | CLEAR_NEXUS_PRE; |
| 225 | scb->clear_nexus.nexus = NEXUS_I_T_L; |
| 226 | scb->clear_nexus.flags = SEND_Q | EXEC_Q | NOTINQ; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 227 | memcpy(scb->clear_nexus.ssp_task.lun, lun, 8); |
| 228 | scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long) |
| 229 | dev->lldd_dev); |
| 230 | CLEAR_NEXUS_POST; |
| 231 | } |
| 232 | |
| 233 | static int asd_clear_nexus_tag(struct sas_task *task) |
| 234 | { |
| 235 | struct asd_ha_struct *asd_ha = task->dev->port->ha->lldd_ha; |
| 236 | struct asd_ascb *tascb = task->lldd_task; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 237 | |
| 238 | CLEAR_NEXUS_PRE; |
| 239 | scb->clear_nexus.nexus = NEXUS_TAG; |
| 240 | memcpy(scb->clear_nexus.ssp_task.lun, task->ssp_task.LUN, 8); |
| 241 | scb->clear_nexus.ssp_task.tag = tascb->tag; |
| 242 | if (task->dev->tproto) |
| 243 | scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long) |
| 244 | task->dev->lldd_dev); |
| 245 | CLEAR_NEXUS_POST; |
| 246 | } |
| 247 | |
| 248 | static int asd_clear_nexus_index(struct sas_task *task) |
| 249 | { |
| 250 | struct asd_ha_struct *asd_ha = task->dev->port->ha->lldd_ha; |
| 251 | struct asd_ascb *tascb = task->lldd_task; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 252 | |
| 253 | CLEAR_NEXUS_PRE; |
| 254 | scb->clear_nexus.nexus = NEXUS_TRANS_CX; |
| 255 | if (task->dev->tproto) |
| 256 | scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long) |
| 257 | task->dev->lldd_dev); |
| 258 | scb->clear_nexus.index = cpu_to_le16(tascb->tc_index); |
| 259 | CLEAR_NEXUS_POST; |
| 260 | } |
| 261 | |
| 262 | /* ---------- TMFs ---------- */ |
| 263 | |
| 264 | static void asd_tmf_timedout(unsigned long data) |
| 265 | { |
| 266 | struct asd_ascb *ascb = (void *) data; |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 267 | struct tasklet_completion_status *tcs = ascb->uldd_task; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 268 | |
| 269 | ASD_DPRINTK("tmf timed out\n"); |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 270 | tcs->tmf_state = TMF_RESP_FUNC_FAILED; |
| 271 | complete(ascb->completion); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 272 | } |
| 273 | |
| 274 | static int asd_get_tmf_resp_tasklet(struct asd_ascb *ascb, |
| 275 | struct done_list_struct *dl) |
| 276 | { |
| 277 | struct asd_ha_struct *asd_ha = ascb->ha; |
| 278 | unsigned long flags; |
| 279 | struct tc_resp_sb_struct { |
| 280 | __le16 index_escb; |
| 281 | u8 len_lsb; |
| 282 | u8 flags; |
| 283 | } __attribute__ ((packed)) *resp_sb = (void *) dl->status_block; |
| 284 | |
| 285 | int edb_id = ((resp_sb->flags & 0x70) >> 4)-1; |
| 286 | struct asd_ascb *escb; |
| 287 | struct asd_dma_tok *edb; |
| 288 | struct ssp_frame_hdr *fh; |
| 289 | struct ssp_response_iu *ru; |
| 290 | int res = TMF_RESP_FUNC_FAILED; |
| 291 | |
| 292 | ASD_DPRINTK("tmf resp tasklet\n"); |
| 293 | |
| 294 | spin_lock_irqsave(&asd_ha->seq.tc_index_lock, flags); |
| 295 | escb = asd_tc_index_find(&asd_ha->seq, |
| 296 | (int)le16_to_cpu(resp_sb->index_escb)); |
| 297 | spin_unlock_irqrestore(&asd_ha->seq.tc_index_lock, flags); |
| 298 | |
| 299 | if (!escb) { |
| 300 | ASD_DPRINTK("Uh-oh! No escb for this dl?!\n"); |
| 301 | return res; |
| 302 | } |
| 303 | |
| 304 | edb = asd_ha->seq.edb_arr[edb_id + escb->edb_index]; |
| 305 | ascb->tag = *(__be16 *)(edb->vaddr+4); |
| 306 | fh = edb->vaddr + 16; |
| 307 | ru = edb->vaddr + 16 + sizeof(*fh); |
| 308 | res = ru->status; |
| 309 | if (ru->datapres == 1) /* Response data present */ |
| 310 | res = ru->resp_data[3]; |
| 311 | #if 0 |
| 312 | ascb->tag = fh->tag; |
| 313 | #endif |
| 314 | ascb->tag_valid = 1; |
| 315 | |
| 316 | asd_invalidate_edb(escb, edb_id); |
| 317 | return res; |
| 318 | } |
| 319 | |
| 320 | static void asd_tmf_tasklet_complete(struct asd_ascb *ascb, |
| 321 | struct done_list_struct *dl) |
| 322 | { |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 323 | struct tasklet_completion_status *tcs; |
| 324 | |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 325 | if (!del_timer(&ascb->timer)) |
| 326 | return; |
| 327 | |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 328 | tcs = ascb->uldd_task; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 329 | ASD_DPRINTK("tmf tasklet complete\n"); |
| 330 | |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 331 | tcs->dl_opcode = dl->opcode; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 332 | |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 333 | if (dl->opcode == TC_SSP_RESP) { |
| 334 | tcs->tmf_state = asd_get_tmf_resp_tasklet(ascb, dl); |
| 335 | tcs->tag_valid = ascb->tag_valid; |
| 336 | tcs->tag = ascb->tag; |
| 337 | } |
| 338 | |
| 339 | complete(ascb->completion); |
| 340 | asd_ascb_free(ascb); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 341 | } |
| 342 | |
Adrian Bunk | 81e56de | 2008-03-28 14:48:34 -0700 | [diff] [blame] | 343 | static int asd_clear_nexus(struct sas_task *task) |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 344 | { |
| 345 | int res = TMF_RESP_FUNC_FAILED; |
Darrick J. Wong | 8fdcf86 | 2007-05-16 14:01:48 -0700 | [diff] [blame] | 346 | int leftover; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 347 | struct asd_ascb *tascb = task->lldd_task; |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 348 | DECLARE_COMPLETION_ONSTACK(completion); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 349 | unsigned long flags; |
| 350 | |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 351 | tascb->completion = &completion; |
| 352 | |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 353 | ASD_DPRINTK("task not done, clearing nexus\n"); |
| 354 | if (tascb->tag_valid) |
| 355 | res = asd_clear_nexus_tag(task); |
| 356 | else |
| 357 | res = asd_clear_nexus_index(task); |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 358 | leftover = wait_for_completion_timeout(&completion, |
Darrick J. Wong | 8fdcf86 | 2007-05-16 14:01:48 -0700 | [diff] [blame] | 359 | AIC94XX_SCB_TIMEOUT); |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 360 | tascb->completion = NULL; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 361 | ASD_DPRINTK("came back from clear nexus\n"); |
| 362 | spin_lock_irqsave(&task->task_state_lock, flags); |
Darrick J. Wong | 8fdcf86 | 2007-05-16 14:01:48 -0700 | [diff] [blame] | 363 | if (leftover < 1) |
| 364 | res = TMF_RESP_FUNC_FAILED; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 365 | if (task->task_state_flags & SAS_TASK_STATE_DONE) |
| 366 | res = TMF_RESP_FUNC_COMPLETE; |
| 367 | spin_unlock_irqrestore(&task->task_state_lock, flags); |
| 368 | |
| 369 | return res; |
| 370 | } |
| 371 | |
| 372 | /** |
| 373 | * asd_abort_task -- ABORT TASK TMF |
| 374 | * @task: the task to be aborted |
| 375 | * |
| 376 | * Before calling ABORT TASK the task state flags should be ORed with |
| 377 | * SAS_TASK_STATE_ABORTED (unless SAS_TASK_STATE_DONE is set) under |
| 378 | * the task_state_lock IRQ spinlock, then ABORT TASK *must* be called. |
| 379 | * |
| 380 | * Implements the ABORT TASK TMF, I_T_L_Q nexus. |
| 381 | * Returns: SAS TMF responses (see sas_task.h), |
| 382 | * -ENOMEM, |
| 383 | * -SAS_QUEUE_FULL. |
| 384 | * |
| 385 | * When ABORT TASK returns, the caller of ABORT TASK checks first the |
| 386 | * task->task_state_flags, and then the return value of ABORT TASK. |
| 387 | * |
| 388 | * If the task has task state bit SAS_TASK_STATE_DONE set, then the |
| 389 | * task was completed successfully prior to it being aborted. The |
| 390 | * caller of ABORT TASK has responsibility to call task->task_done() |
| 391 | * xor free the task, depending on their framework. The return code |
| 392 | * is TMF_RESP_FUNC_FAILED in this case. |
| 393 | * |
| 394 | * Else the SAS_TASK_STATE_DONE bit is not set, |
| 395 | * If the return code is TMF_RESP_FUNC_COMPLETE, then |
| 396 | * the task was aborted successfully. The caller of |
| 397 | * ABORT TASK has responsibility to call task->task_done() |
| 398 | * to finish the task, xor free the task depending on their |
| 399 | * framework. |
| 400 | * else |
| 401 | * the ABORT TASK returned some kind of error. The task |
| 402 | * was _not_ cancelled. Nothing can be assumed. |
| 403 | * The caller of ABORT TASK may wish to retry. |
| 404 | */ |
| 405 | int asd_abort_task(struct sas_task *task) |
| 406 | { |
| 407 | struct asd_ascb *tascb = task->lldd_task; |
| 408 | struct asd_ha_struct *asd_ha = tascb->ha; |
| 409 | int res = 1; |
| 410 | unsigned long flags; |
| 411 | struct asd_ascb *ascb = NULL; |
| 412 | struct scb *scb; |
Darrick J. Wong | 8fdcf86 | 2007-05-16 14:01:48 -0700 | [diff] [blame] | 413 | int leftover; |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 414 | DECLARE_TCS(tcs); |
| 415 | DECLARE_COMPLETION_ONSTACK(completion); |
| 416 | DECLARE_COMPLETION_ONSTACK(tascb_completion); |
| 417 | |
| 418 | tascb->completion = &tascb_completion; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 419 | |
| 420 | spin_lock_irqsave(&task->task_state_lock, flags); |
| 421 | if (task->task_state_flags & SAS_TASK_STATE_DONE) { |
| 422 | spin_unlock_irqrestore(&task->task_state_lock, flags); |
| 423 | res = TMF_RESP_FUNC_COMPLETE; |
Harvey Harrison | cadbd4a | 2008-07-03 23:47:27 -0700 | [diff] [blame] | 424 | ASD_DPRINTK("%s: task 0x%p done\n", __func__, task); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 425 | goto out_done; |
| 426 | } |
| 427 | spin_unlock_irqrestore(&task->task_state_lock, flags); |
| 428 | |
| 429 | ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL); |
| 430 | if (!ascb) |
| 431 | return -ENOMEM; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 432 | |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 433 | ascb->uldd_task = &tcs; |
| 434 | ascb->completion = &completion; |
| 435 | scb = ascb->scb; |
Boaz Harrosh | 90b0c41 | 2008-02-06 15:38:33 +0200 | [diff] [blame] | 436 | scb->header.opcode = SCB_ABORT_TASK; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 437 | |
| 438 | switch (task->task_proto) { |
Darrick J. Wong | 5929faf | 2007-11-05 11:51:17 -0800 | [diff] [blame] | 439 | case SAS_PROTOCOL_SATA: |
| 440 | case SAS_PROTOCOL_STP: |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 441 | scb->abort_task.proto_conn_rate = (1 << 5); /* STP */ |
| 442 | break; |
Darrick J. Wong | 5929faf | 2007-11-05 11:51:17 -0800 | [diff] [blame] | 443 | case SAS_PROTOCOL_SSP: |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 444 | scb->abort_task.proto_conn_rate = (1 << 4); /* SSP */ |
| 445 | scb->abort_task.proto_conn_rate |= task->dev->linkrate; |
| 446 | break; |
Darrick J. Wong | 5929faf | 2007-11-05 11:51:17 -0800 | [diff] [blame] | 447 | case SAS_PROTOCOL_SMP: |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 448 | break; |
| 449 | default: |
| 450 | break; |
| 451 | } |
| 452 | |
Darrick J. Wong | 5929faf | 2007-11-05 11:51:17 -0800 | [diff] [blame] | 453 | if (task->task_proto == SAS_PROTOCOL_SSP) { |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 454 | scb->abort_task.ssp_frame.frame_type = SSP_TASK; |
| 455 | memcpy(scb->abort_task.ssp_frame.hashed_dest_addr, |
| 456 | task->dev->hashed_sas_addr, HASHED_SAS_ADDR_SIZE); |
| 457 | memcpy(scb->abort_task.ssp_frame.hashed_src_addr, |
| 458 | task->dev->port->ha->hashed_sas_addr, |
| 459 | HASHED_SAS_ADDR_SIZE); |
| 460 | scb->abort_task.ssp_frame.tptt = cpu_to_be16(0xFFFF); |
| 461 | |
| 462 | memcpy(scb->abort_task.ssp_task.lun, task->ssp_task.LUN, 8); |
| 463 | scb->abort_task.ssp_task.tmf = TMF_ABORT_TASK; |
| 464 | scb->abort_task.ssp_task.tag = cpu_to_be16(0xFFFF); |
| 465 | } |
| 466 | |
| 467 | scb->abort_task.sister_scb = cpu_to_le16(0xFFFF); |
| 468 | scb->abort_task.conn_handle = cpu_to_le16( |
| 469 | (u16)(unsigned long)task->dev->lldd_dev); |
| 470 | scb->abort_task.retry_count = 1; |
| 471 | scb->abort_task.index = cpu_to_le16((u16)tascb->tc_index); |
| 472 | scb->abort_task.itnl_to = cpu_to_le16(ITNL_TIMEOUT_CONST); |
| 473 | |
| 474 | res = asd_enqueue_internal(ascb, asd_tmf_tasklet_complete, |
| 475 | asd_tmf_timedout); |
| 476 | if (res) |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 477 | goto out_free; |
| 478 | wait_for_completion(&completion); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 479 | ASD_DPRINTK("tmf came back\n"); |
| 480 | |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 481 | tascb->tag = tcs.tag; |
| 482 | tascb->tag_valid = tcs.tag_valid; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 483 | |
| 484 | spin_lock_irqsave(&task->task_state_lock, flags); |
| 485 | if (task->task_state_flags & SAS_TASK_STATE_DONE) { |
| 486 | spin_unlock_irqrestore(&task->task_state_lock, flags); |
| 487 | res = TMF_RESP_FUNC_COMPLETE; |
Harvey Harrison | cadbd4a | 2008-07-03 23:47:27 -0700 | [diff] [blame] | 488 | ASD_DPRINTK("%s: task 0x%p done\n", __func__, task); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 489 | goto out_done; |
| 490 | } |
| 491 | spin_unlock_irqrestore(&task->task_state_lock, flags); |
| 492 | |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 493 | if (tcs.dl_opcode == TC_SSP_RESP) { |
| 494 | /* The task to be aborted has been sent to the device. |
| 495 | * We got a Response IU for the ABORT TASK TMF. */ |
| 496 | if (tcs.tmf_state == TMF_RESP_FUNC_COMPLETE) |
| 497 | res = asd_clear_nexus(task); |
| 498 | else |
| 499 | res = tcs.tmf_state; |
| 500 | } else if (tcs.dl_opcode == TC_NO_ERROR && |
| 501 | tcs.tmf_state == TMF_RESP_FUNC_FAILED) { |
| 502 | /* timeout */ |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 503 | res = TMF_RESP_FUNC_FAILED; |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 504 | } else { |
| 505 | /* In the following we assume that the managing layer |
| 506 | * will _never_ make a mistake, when issuing ABORT |
| 507 | * TASK. |
| 508 | */ |
| 509 | switch (tcs.dl_opcode) { |
| 510 | default: |
| 511 | res = asd_clear_nexus(task); |
| 512 | /* fallthrough */ |
| 513 | case TC_NO_ERROR: |
| 514 | break; |
| 515 | /* The task hasn't been sent to the device xor |
| 516 | * we never got a (sane) Response IU for the |
| 517 | * ABORT TASK TMF. |
| 518 | */ |
| 519 | case TF_NAK_RECV: |
| 520 | res = TMF_RESP_INVALID_FRAME; |
| 521 | break; |
| 522 | case TF_TMF_TASK_DONE: /* done but not reported yet */ |
Darrick J. Wong | 8fdcf86 | 2007-05-16 14:01:48 -0700 | [diff] [blame] | 523 | res = TMF_RESP_FUNC_FAILED; |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 524 | leftover = |
| 525 | wait_for_completion_timeout(&tascb_completion, |
| 526 | AIC94XX_SCB_TIMEOUT); |
| 527 | spin_lock_irqsave(&task->task_state_lock, flags); |
| 528 | if (leftover < 1) |
| 529 | res = TMF_RESP_FUNC_FAILED; |
| 530 | if (task->task_state_flags & SAS_TASK_STATE_DONE) |
| 531 | res = TMF_RESP_FUNC_COMPLETE; |
| 532 | spin_unlock_irqrestore(&task->task_state_lock, flags); |
| 533 | break; |
| 534 | case TF_TMF_NO_TAG: |
| 535 | case TF_TMF_TAG_FREE: /* the tag is in the free list */ |
| 536 | case TF_TMF_NO_CONN_HANDLE: /* no such device */ |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 537 | res = TMF_RESP_FUNC_COMPLETE; |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 538 | break; |
| 539 | case TF_TMF_NO_CTX: /* not in seq, or proto != SSP */ |
| 540 | res = TMF_RESP_FUNC_ESUPP; |
| 541 | break; |
| 542 | } |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 543 | } |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 544 | out_done: |
| 545 | tascb->completion = NULL; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 546 | if (res == TMF_RESP_FUNC_COMPLETE) { |
| 547 | task->lldd_task = NULL; |
| 548 | mb(); |
| 549 | asd_ascb_free(tascb); |
| 550 | } |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 551 | ASD_DPRINTK("task 0x%p aborted, res: 0x%x\n", task, res); |
| 552 | return res; |
| 553 | |
| 554 | out_free: |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 555 | asd_ascb_free(ascb); |
| 556 | ASD_DPRINTK("task 0x%p aborted, res: 0x%x\n", task, res); |
| 557 | return res; |
| 558 | } |
| 559 | |
| 560 | /** |
| 561 | * asd_initiate_ssp_tmf -- send a TMF to an I_T_L or I_T_L_Q nexus |
| 562 | * @dev: pointer to struct domain_device of interest |
| 563 | * @lun: pointer to u8[8] which is the LUN |
| 564 | * @tmf: the TMF to be performed (see sas_task.h or the SAS spec) |
| 565 | * @index: the transaction context of the task to be queried if QT TMF |
| 566 | * |
| 567 | * This function is used to send ABORT TASK SET, CLEAR ACA, |
| 568 | * CLEAR TASK SET, LU RESET and QUERY TASK TMFs. |
| 569 | * |
| 570 | * No SCBs should be queued to the I_T_L nexus when this SCB is |
| 571 | * pending. |
| 572 | * |
| 573 | * Returns: TMF response code (see sas_task.h or the SAS spec) |
| 574 | */ |
| 575 | static int asd_initiate_ssp_tmf(struct domain_device *dev, u8 *lun, |
| 576 | int tmf, int index) |
| 577 | { |
| 578 | struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha; |
| 579 | struct asd_ascb *ascb; |
| 580 | int res = 1; |
| 581 | struct scb *scb; |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 582 | DECLARE_COMPLETION_ONSTACK(completion); |
| 583 | DECLARE_TCS(tcs); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 584 | |
Darrick J. Wong | 5929faf | 2007-11-05 11:51:17 -0800 | [diff] [blame] | 585 | if (!(dev->tproto & SAS_PROTOCOL_SSP)) |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 586 | return TMF_RESP_FUNC_ESUPP; |
| 587 | |
| 588 | ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL); |
| 589 | if (!ascb) |
| 590 | return -ENOMEM; |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 591 | |
| 592 | ascb->completion = &completion; |
| 593 | ascb->uldd_task = &tcs; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 594 | scb = ascb->scb; |
| 595 | |
| 596 | if (tmf == TMF_QUERY_TASK) |
| 597 | scb->header.opcode = QUERY_SSP_TASK; |
| 598 | else |
| 599 | scb->header.opcode = INITIATE_SSP_TMF; |
| 600 | |
| 601 | scb->ssp_tmf.proto_conn_rate = (1 << 4); /* SSP */ |
| 602 | scb->ssp_tmf.proto_conn_rate |= dev->linkrate; |
| 603 | /* SSP frame header */ |
| 604 | scb->ssp_tmf.ssp_frame.frame_type = SSP_TASK; |
| 605 | memcpy(scb->ssp_tmf.ssp_frame.hashed_dest_addr, |
| 606 | dev->hashed_sas_addr, HASHED_SAS_ADDR_SIZE); |
| 607 | memcpy(scb->ssp_tmf.ssp_frame.hashed_src_addr, |
| 608 | dev->port->ha->hashed_sas_addr, HASHED_SAS_ADDR_SIZE); |
| 609 | scb->ssp_tmf.ssp_frame.tptt = cpu_to_be16(0xFFFF); |
| 610 | /* SSP Task IU */ |
| 611 | memcpy(scb->ssp_tmf.ssp_task.lun, lun, 8); |
| 612 | scb->ssp_tmf.ssp_task.tmf = tmf; |
| 613 | |
| 614 | scb->ssp_tmf.sister_scb = cpu_to_le16(0xFFFF); |
| 615 | scb->ssp_tmf.conn_handle= cpu_to_le16((u16)(unsigned long) |
| 616 | dev->lldd_dev); |
| 617 | scb->ssp_tmf.retry_count = 1; |
| 618 | scb->ssp_tmf.itnl_to = cpu_to_le16(ITNL_TIMEOUT_CONST); |
| 619 | if (tmf == TMF_QUERY_TASK) |
| 620 | scb->ssp_tmf.index = cpu_to_le16(index); |
| 621 | |
| 622 | res = asd_enqueue_internal(ascb, asd_tmf_tasklet_complete, |
| 623 | asd_tmf_timedout); |
| 624 | if (res) |
| 625 | goto out_err; |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 626 | wait_for_completion(&completion); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 627 | |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 628 | switch (tcs.dl_opcode) { |
| 629 | case TC_NO_ERROR: |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 630 | res = TMF_RESP_FUNC_COMPLETE; |
| 631 | break; |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 632 | case TF_NAK_RECV: |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 633 | res = TMF_RESP_INVALID_FRAME; |
| 634 | break; |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 635 | case TF_TMF_TASK_DONE: |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 636 | res = TMF_RESP_FUNC_FAILED; |
| 637 | break; |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 638 | case TF_TMF_NO_TAG: |
| 639 | case TF_TMF_TAG_FREE: /* the tag is in the free list */ |
| 640 | case TF_TMF_NO_CONN_HANDLE: /* no such device */ |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 641 | res = TMF_RESP_FUNC_COMPLETE; |
| 642 | break; |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 643 | case TF_TMF_NO_CTX: /* not in seq, or proto != SSP */ |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 644 | res = TMF_RESP_FUNC_ESUPP; |
| 645 | break; |
| 646 | default: |
Darrick J. Wong | 058e2c4 | 2007-01-29 23:48:22 -0800 | [diff] [blame] | 647 | /* Allow TMF response codes to propagate upwards */ |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 648 | res = tcs.dl_opcode; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 649 | break; |
| 650 | } |
James Bottomley | e2396f1 | 2008-02-23 23:44:19 -0600 | [diff] [blame] | 651 | return res; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 652 | out_err: |
| 653 | asd_ascb_free(ascb); |
| 654 | return res; |
| 655 | } |
| 656 | |
| 657 | int asd_abort_task_set(struct domain_device *dev, u8 *lun) |
| 658 | { |
| 659 | int res = asd_initiate_ssp_tmf(dev, lun, TMF_ABORT_TASK_SET, 0); |
| 660 | |
| 661 | if (res == TMF_RESP_FUNC_COMPLETE) |
| 662 | asd_clear_nexus_I_T_L(dev, lun); |
| 663 | return res; |
| 664 | } |
| 665 | |
| 666 | int asd_clear_aca(struct domain_device *dev, u8 *lun) |
| 667 | { |
| 668 | int res = asd_initiate_ssp_tmf(dev, lun, TMF_CLEAR_ACA, 0); |
| 669 | |
| 670 | if (res == TMF_RESP_FUNC_COMPLETE) |
| 671 | asd_clear_nexus_I_T_L(dev, lun); |
| 672 | return res; |
| 673 | } |
| 674 | |
| 675 | int asd_clear_task_set(struct domain_device *dev, u8 *lun) |
| 676 | { |
| 677 | int res = asd_initiate_ssp_tmf(dev, lun, TMF_CLEAR_TASK_SET, 0); |
| 678 | |
| 679 | if (res == TMF_RESP_FUNC_COMPLETE) |
| 680 | asd_clear_nexus_I_T_L(dev, lun); |
| 681 | return res; |
| 682 | } |
| 683 | |
| 684 | int asd_lu_reset(struct domain_device *dev, u8 *lun) |
| 685 | { |
| 686 | int res = asd_initiate_ssp_tmf(dev, lun, TMF_LU_RESET, 0); |
| 687 | |
| 688 | if (res == TMF_RESP_FUNC_COMPLETE) |
| 689 | asd_clear_nexus_I_T_L(dev, lun); |
| 690 | return res; |
| 691 | } |
| 692 | |
| 693 | /** |
| 694 | * asd_query_task -- send a QUERY TASK TMF to an I_T_L_Q nexus |
| 695 | * task: pointer to sas_task struct of interest |
| 696 | * |
| 697 | * Returns: TMF_RESP_FUNC_COMPLETE if the task is not in the task set, |
| 698 | * or TMF_RESP_FUNC_SUCC if the task is in the task set. |
| 699 | * |
| 700 | * Normally the management layer sets the task to aborted state, |
| 701 | * and then calls query task and then abort task. |
| 702 | */ |
| 703 | int asd_query_task(struct sas_task *task) |
| 704 | { |
| 705 | struct asd_ascb *ascb = task->lldd_task; |
| 706 | int index; |
| 707 | |
| 708 | if (ascb) { |
| 709 | index = ascb->tc_index; |
| 710 | return asd_initiate_ssp_tmf(task->dev, task->ssp_task.LUN, |
| 711 | TMF_QUERY_TASK, index); |
| 712 | } |
| 713 | return TMF_RESP_FUNC_COMPLETE; |
| 714 | } |