James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Serial Attached SCSI (SAS) Expander discovery and configuration |
| 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 program is free software; you can redistribute it and/or |
| 10 | * modify it under the terms of the GNU General Public License as |
| 11 | * published by the Free Software Foundation; either version 2 of the |
| 12 | * License, or (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, but |
| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 17 | * General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 22 | * |
| 23 | */ |
| 24 | |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 25 | #include <linux/scatterlist.h> |
FUJITA Tomonori | ba1fc17 | 2007-07-09 12:52:08 +0900 | [diff] [blame] | 26 | #include <linux/blkdev.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 27 | #include <linux/slab.h> |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 28 | |
| 29 | #include "sas_internal.h" |
| 30 | |
| 31 | #include <scsi/scsi_transport.h> |
| 32 | #include <scsi/scsi_transport_sas.h> |
| 33 | #include "../scsi_sas_internal.h" |
| 34 | |
| 35 | static int sas_discover_expander(struct domain_device *dev); |
| 36 | static int sas_configure_routing(struct domain_device *dev, u8 *sas_addr); |
| 37 | static int sas_configure_phy(struct domain_device *dev, int phy_id, |
| 38 | u8 *sas_addr, int include); |
| 39 | static int sas_disable_routing(struct domain_device *dev, u8 *sas_addr); |
| 40 | |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 41 | /* ---------- SMP task management ---------- */ |
| 42 | |
| 43 | static void smp_task_timedout(unsigned long _task) |
| 44 | { |
| 45 | struct sas_task *task = (void *) _task; |
| 46 | unsigned long flags; |
| 47 | |
| 48 | spin_lock_irqsave(&task->task_state_lock, flags); |
| 49 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) |
| 50 | task->task_state_flags |= SAS_TASK_STATE_ABORTED; |
| 51 | spin_unlock_irqrestore(&task->task_state_lock, flags); |
| 52 | |
| 53 | complete(&task->completion); |
| 54 | } |
| 55 | |
| 56 | static void smp_task_done(struct sas_task *task) |
| 57 | { |
| 58 | if (!del_timer(&task->timer)) |
| 59 | return; |
| 60 | complete(&task->completion); |
| 61 | } |
| 62 | |
| 63 | /* Give it some long enough timeout. In seconds. */ |
| 64 | #define SMP_TIMEOUT 10 |
| 65 | |
| 66 | static int smp_execute_task(struct domain_device *dev, void *req, int req_size, |
| 67 | void *resp, int resp_size) |
| 68 | { |
malahal@us.ibm.com | 42961ee | 2006-10-04 17:34:03 -0700 | [diff] [blame] | 69 | int res, retry; |
| 70 | struct sas_task *task = NULL; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 71 | struct sas_internal *i = |
| 72 | to_sas_internal(dev->port->ha->core.shost->transportt); |
| 73 | |
malahal@us.ibm.com | 42961ee | 2006-10-04 17:34:03 -0700 | [diff] [blame] | 74 | for (retry = 0; retry < 3; retry++) { |
| 75 | task = sas_alloc_task(GFP_KERNEL); |
| 76 | if (!task) |
| 77 | return -ENOMEM; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 78 | |
malahal@us.ibm.com | 42961ee | 2006-10-04 17:34:03 -0700 | [diff] [blame] | 79 | task->dev = dev; |
| 80 | task->task_proto = dev->tproto; |
| 81 | sg_init_one(&task->smp_task.smp_req, req, req_size); |
| 82 | sg_init_one(&task->smp_task.smp_resp, resp, resp_size); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 83 | |
malahal@us.ibm.com | 42961ee | 2006-10-04 17:34:03 -0700 | [diff] [blame] | 84 | task->task_done = smp_task_done; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 85 | |
malahal@us.ibm.com | 42961ee | 2006-10-04 17:34:03 -0700 | [diff] [blame] | 86 | task->timer.data = (unsigned long) task; |
| 87 | task->timer.function = smp_task_timedout; |
| 88 | task->timer.expires = jiffies + SMP_TIMEOUT*HZ; |
| 89 | add_timer(&task->timer); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 90 | |
malahal@us.ibm.com | 42961ee | 2006-10-04 17:34:03 -0700 | [diff] [blame] | 91 | res = i->dft->lldd_execute_task(task, 1, GFP_KERNEL); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 92 | |
malahal@us.ibm.com | 42961ee | 2006-10-04 17:34:03 -0700 | [diff] [blame] | 93 | if (res) { |
| 94 | del_timer(&task->timer); |
| 95 | SAS_DPRINTK("executing SMP task failed:%d\n", res); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 96 | goto ex_err; |
| 97 | } |
malahal@us.ibm.com | 42961ee | 2006-10-04 17:34:03 -0700 | [diff] [blame] | 98 | |
| 99 | wait_for_completion(&task->completion); |
James Bottomley | 32e8ae3 | 2007-12-30 12:37:31 -0600 | [diff] [blame] | 100 | res = -ECOMM; |
malahal@us.ibm.com | 42961ee | 2006-10-04 17:34:03 -0700 | [diff] [blame] | 101 | if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) { |
| 102 | SAS_DPRINTK("smp task timed out or aborted\n"); |
| 103 | i->dft->lldd_abort_task(task); |
| 104 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) { |
| 105 | SAS_DPRINTK("SMP task aborted and not done\n"); |
| 106 | goto ex_err; |
| 107 | } |
| 108 | } |
| 109 | if (task->task_status.resp == SAS_TASK_COMPLETE && |
James Bottomley | df64d3c | 2010-07-27 15:51:13 -0500 | [diff] [blame] | 110 | task->task_status.stat == SAM_STAT_GOOD) { |
malahal@us.ibm.com | 42961ee | 2006-10-04 17:34:03 -0700 | [diff] [blame] | 111 | res = 0; |
| 112 | break; |
James Bottomley | 2d4b63e | 2007-12-29 11:49:53 -0600 | [diff] [blame] | 113 | } if (task->task_status.resp == SAS_TASK_COMPLETE && |
| 114 | task->task_status.stat == SAS_DATA_UNDERRUN) { |
| 115 | /* no error, but return the number of bytes of |
| 116 | * underrun */ |
| 117 | res = task->task_status.residual; |
| 118 | break; |
| 119 | } if (task->task_status.resp == SAS_TASK_COMPLETE && |
| 120 | task->task_status.stat == SAS_DATA_OVERRUN) { |
| 121 | res = -EMSGSIZE; |
| 122 | break; |
malahal@us.ibm.com | 42961ee | 2006-10-04 17:34:03 -0700 | [diff] [blame] | 123 | } else { |
| 124 | SAS_DPRINTK("%s: task to dev %016llx response: 0x%x " |
Harvey Harrison | cadbd4a | 2008-07-03 23:47:27 -0700 | [diff] [blame] | 125 | "status 0x%x\n", __func__, |
malahal@us.ibm.com | 42961ee | 2006-10-04 17:34:03 -0700 | [diff] [blame] | 126 | SAS_ADDR(dev->sas_addr), |
| 127 | task->task_status.resp, |
| 128 | task->task_status.stat); |
| 129 | sas_free_task(task); |
| 130 | task = NULL; |
| 131 | } |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 132 | } |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 133 | ex_err: |
malahal@us.ibm.com | 42961ee | 2006-10-04 17:34:03 -0700 | [diff] [blame] | 134 | BUG_ON(retry == 3 && task != NULL); |
| 135 | if (task != NULL) { |
| 136 | sas_free_task(task); |
| 137 | } |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 138 | return res; |
| 139 | } |
| 140 | |
| 141 | /* ---------- Allocations ---------- */ |
| 142 | |
| 143 | static inline void *alloc_smp_req(int size) |
| 144 | { |
| 145 | u8 *p = kzalloc(size, GFP_KERNEL); |
| 146 | if (p) |
| 147 | p[0] = SMP_REQUEST; |
| 148 | return p; |
| 149 | } |
| 150 | |
| 151 | static inline void *alloc_smp_resp(int size) |
| 152 | { |
| 153 | return kzalloc(size, GFP_KERNEL); |
| 154 | } |
| 155 | |
| 156 | /* ---------- Expander configuration ---------- */ |
| 157 | |
| 158 | static void sas_set_ex_phy(struct domain_device *dev, int phy_id, |
| 159 | void *disc_resp) |
| 160 | { |
| 161 | struct expander_device *ex = &dev->ex_dev; |
| 162 | struct ex_phy *phy = &ex->ex_phy[phy_id]; |
| 163 | struct smp_resp *resp = disc_resp; |
| 164 | struct discover_resp *dr = &resp->disc; |
| 165 | struct sas_rphy *rphy = dev->rphy; |
| 166 | int rediscover = (phy->phy != NULL); |
| 167 | |
| 168 | if (!rediscover) { |
| 169 | phy->phy = sas_phy_alloc(&rphy->dev, phy_id); |
| 170 | |
| 171 | /* FIXME: error_handling */ |
| 172 | BUG_ON(!phy->phy); |
| 173 | } |
| 174 | |
| 175 | switch (resp->result) { |
| 176 | case SMP_RESP_PHY_VACANT: |
| 177 | phy->phy_state = PHY_VACANT; |
| 178 | return; |
| 179 | default: |
| 180 | phy->phy_state = PHY_NOT_PRESENT; |
| 181 | return; |
| 182 | case SMP_RESP_FUNC_ACC: |
| 183 | phy->phy_state = PHY_EMPTY; /* do not know yet */ |
| 184 | break; |
| 185 | } |
| 186 | |
| 187 | phy->phy_id = phy_id; |
| 188 | phy->attached_dev_type = dr->attached_dev_type; |
| 189 | phy->linkrate = dr->linkrate; |
| 190 | phy->attached_sata_host = dr->attached_sata_host; |
| 191 | phy->attached_sata_dev = dr->attached_sata_dev; |
| 192 | phy->attached_sata_ps = dr->attached_sata_ps; |
| 193 | phy->attached_iproto = dr->iproto << 1; |
| 194 | phy->attached_tproto = dr->tproto << 1; |
| 195 | memcpy(phy->attached_sas_addr, dr->attached_sas_addr, SAS_ADDR_SIZE); |
| 196 | phy->attached_phy_id = dr->attached_phy_id; |
| 197 | phy->phy_change_count = dr->change_count; |
| 198 | phy->routing_attr = dr->routing_attr; |
| 199 | phy->virtual = dr->virtual; |
| 200 | phy->last_da_index = -1; |
| 201 | |
| 202 | phy->phy->identify.initiator_port_protocols = phy->attached_iproto; |
| 203 | phy->phy->identify.target_port_protocols = phy->attached_tproto; |
| 204 | phy->phy->identify.phy_identifier = phy_id; |
James Bottomley | a01e70e | 2006-09-06 19:28:07 -0500 | [diff] [blame] | 205 | phy->phy->minimum_linkrate_hw = dr->hmin_linkrate; |
| 206 | phy->phy->maximum_linkrate_hw = dr->hmax_linkrate; |
| 207 | phy->phy->minimum_linkrate = dr->pmin_linkrate; |
| 208 | phy->phy->maximum_linkrate = dr->pmax_linkrate; |
James Bottomley | 88edf74 | 2006-09-06 17:36:13 -0500 | [diff] [blame] | 209 | phy->phy->negotiated_linkrate = phy->linkrate; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 210 | |
| 211 | if (!rediscover) |
| 212 | sas_phy_add(phy->phy); |
| 213 | |
| 214 | SAS_DPRINTK("ex %016llx phy%02d:%c attached: %016llx\n", |
| 215 | SAS_ADDR(dev->sas_addr), phy->phy_id, |
| 216 | phy->routing_attr == TABLE_ROUTING ? 'T' : |
| 217 | phy->routing_attr == DIRECT_ROUTING ? 'D' : |
| 218 | phy->routing_attr == SUBTRACTIVE_ROUTING ? 'S' : '?', |
| 219 | SAS_ADDR(phy->attached_sas_addr)); |
| 220 | |
| 221 | return; |
| 222 | } |
| 223 | |
| 224 | #define DISCOVER_REQ_SIZE 16 |
| 225 | #define DISCOVER_RESP_SIZE 56 |
| 226 | |
James Bottomley | 1acce19 | 2006-08-22 12:39:19 -0500 | [diff] [blame] | 227 | static int sas_ex_phy_discover_helper(struct domain_device *dev, u8 *disc_req, |
| 228 | u8 *disc_resp, int single) |
| 229 | { |
| 230 | int i, res; |
| 231 | |
| 232 | disc_req[9] = single; |
| 233 | for (i = 1 ; i < 3; i++) { |
| 234 | struct discover_resp *dr; |
| 235 | |
| 236 | res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE, |
| 237 | disc_resp, DISCOVER_RESP_SIZE); |
| 238 | if (res) |
| 239 | return res; |
| 240 | /* This is detecting a failure to transmit inital |
| 241 | * dev to host FIS as described in section G.5 of |
| 242 | * sas-2 r 04b */ |
| 243 | dr = &((struct smp_resp *)disc_resp)->disc; |
| 244 | if (!(dr->attached_dev_type == 0 && |
| 245 | dr->attached_sata_dev)) |
| 246 | break; |
| 247 | /* In order to generate the dev to host FIS, we |
| 248 | * send a link reset to the expander port */ |
James Bottomley | 38e2f03 | 2006-09-07 15:52:09 -0500 | [diff] [blame] | 249 | sas_smp_phy_control(dev, single, PHY_FUNC_LINK_RESET, NULL); |
James Bottomley | 1acce19 | 2006-08-22 12:39:19 -0500 | [diff] [blame] | 250 | /* Wait for the reset to trigger the negotiation */ |
| 251 | msleep(500); |
| 252 | } |
| 253 | sas_set_ex_phy(dev, single, disc_resp); |
| 254 | return 0; |
| 255 | } |
| 256 | |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 257 | static int sas_ex_phy_discover(struct domain_device *dev, int single) |
| 258 | { |
| 259 | struct expander_device *ex = &dev->ex_dev; |
| 260 | int res = 0; |
| 261 | u8 *disc_req; |
| 262 | u8 *disc_resp; |
| 263 | |
| 264 | disc_req = alloc_smp_req(DISCOVER_REQ_SIZE); |
| 265 | if (!disc_req) |
| 266 | return -ENOMEM; |
| 267 | |
| 268 | disc_resp = alloc_smp_req(DISCOVER_RESP_SIZE); |
| 269 | if (!disc_resp) { |
| 270 | kfree(disc_req); |
| 271 | return -ENOMEM; |
| 272 | } |
| 273 | |
| 274 | disc_req[1] = SMP_DISCOVER; |
| 275 | |
| 276 | if (0 <= single && single < ex->num_phys) { |
James Bottomley | 1acce19 | 2006-08-22 12:39:19 -0500 | [diff] [blame] | 277 | res = sas_ex_phy_discover_helper(dev, disc_req, disc_resp, single); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 278 | } else { |
| 279 | int i; |
| 280 | |
| 281 | for (i = 0; i < ex->num_phys; i++) { |
James Bottomley | 1acce19 | 2006-08-22 12:39:19 -0500 | [diff] [blame] | 282 | res = sas_ex_phy_discover_helper(dev, disc_req, |
| 283 | disc_resp, i); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 284 | if (res) |
| 285 | goto out_err; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 286 | } |
| 287 | } |
| 288 | out_err: |
| 289 | kfree(disc_resp); |
| 290 | kfree(disc_req); |
| 291 | return res; |
| 292 | } |
| 293 | |
| 294 | static int sas_expander_discover(struct domain_device *dev) |
| 295 | { |
| 296 | struct expander_device *ex = &dev->ex_dev; |
| 297 | int res = -ENOMEM; |
| 298 | |
| 299 | ex->ex_phy = kzalloc(sizeof(*ex->ex_phy)*ex->num_phys, GFP_KERNEL); |
| 300 | if (!ex->ex_phy) |
| 301 | return -ENOMEM; |
| 302 | |
| 303 | res = sas_ex_phy_discover(dev, -1); |
| 304 | if (res) |
| 305 | goto out_err; |
| 306 | |
| 307 | return 0; |
| 308 | out_err: |
| 309 | kfree(ex->ex_phy); |
| 310 | ex->ex_phy = NULL; |
| 311 | return res; |
| 312 | } |
| 313 | |
| 314 | #define MAX_EXPANDER_PHYS 128 |
| 315 | |
| 316 | static void ex_assign_report_general(struct domain_device *dev, |
| 317 | struct smp_resp *resp) |
| 318 | { |
| 319 | struct report_general_resp *rg = &resp->rg; |
| 320 | |
| 321 | dev->ex_dev.ex_change_count = be16_to_cpu(rg->change_count); |
| 322 | dev->ex_dev.max_route_indexes = be16_to_cpu(rg->route_indexes); |
| 323 | dev->ex_dev.num_phys = min(rg->num_phys, (u8)MAX_EXPANDER_PHYS); |
| 324 | dev->ex_dev.conf_route_table = rg->conf_route_table; |
| 325 | dev->ex_dev.configuring = rg->configuring; |
| 326 | memcpy(dev->ex_dev.enclosure_logical_id, rg->enclosure_logical_id, 8); |
| 327 | } |
| 328 | |
| 329 | #define RG_REQ_SIZE 8 |
| 330 | #define RG_RESP_SIZE 32 |
| 331 | |
| 332 | static int sas_ex_general(struct domain_device *dev) |
| 333 | { |
| 334 | u8 *rg_req; |
| 335 | struct smp_resp *rg_resp; |
| 336 | int res; |
| 337 | int i; |
| 338 | |
| 339 | rg_req = alloc_smp_req(RG_REQ_SIZE); |
| 340 | if (!rg_req) |
| 341 | return -ENOMEM; |
| 342 | |
| 343 | rg_resp = alloc_smp_resp(RG_RESP_SIZE); |
| 344 | if (!rg_resp) { |
| 345 | kfree(rg_req); |
| 346 | return -ENOMEM; |
| 347 | } |
| 348 | |
| 349 | rg_req[1] = SMP_REPORT_GENERAL; |
| 350 | |
| 351 | for (i = 0; i < 5; i++) { |
| 352 | res = smp_execute_task(dev, rg_req, RG_REQ_SIZE, rg_resp, |
| 353 | RG_RESP_SIZE); |
| 354 | |
| 355 | if (res) { |
| 356 | SAS_DPRINTK("RG to ex %016llx failed:0x%x\n", |
| 357 | SAS_ADDR(dev->sas_addr), res); |
| 358 | goto out; |
| 359 | } else if (rg_resp->result != SMP_RESP_FUNC_ACC) { |
| 360 | SAS_DPRINTK("RG:ex %016llx returned SMP result:0x%x\n", |
| 361 | SAS_ADDR(dev->sas_addr), rg_resp->result); |
| 362 | res = rg_resp->result; |
| 363 | goto out; |
| 364 | } |
| 365 | |
| 366 | ex_assign_report_general(dev, rg_resp); |
| 367 | |
| 368 | if (dev->ex_dev.configuring) { |
| 369 | SAS_DPRINTK("RG: ex %llx self-configuring...\n", |
| 370 | SAS_ADDR(dev->sas_addr)); |
| 371 | schedule_timeout_interruptible(5*HZ); |
| 372 | } else |
| 373 | break; |
| 374 | } |
| 375 | out: |
| 376 | kfree(rg_req); |
| 377 | kfree(rg_resp); |
| 378 | return res; |
| 379 | } |
| 380 | |
| 381 | static void ex_assign_manuf_info(struct domain_device *dev, void |
| 382 | *_mi_resp) |
| 383 | { |
| 384 | u8 *mi_resp = _mi_resp; |
| 385 | struct sas_rphy *rphy = dev->rphy; |
| 386 | struct sas_expander_device *edev = rphy_to_expander_device(rphy); |
| 387 | |
| 388 | memcpy(edev->vendor_id, mi_resp + 12, SAS_EXPANDER_VENDOR_ID_LEN); |
| 389 | memcpy(edev->product_id, mi_resp + 20, SAS_EXPANDER_PRODUCT_ID_LEN); |
| 390 | memcpy(edev->product_rev, mi_resp + 36, |
| 391 | SAS_EXPANDER_PRODUCT_REV_LEN); |
| 392 | |
| 393 | if (mi_resp[8] & 1) { |
| 394 | memcpy(edev->component_vendor_id, mi_resp + 40, |
| 395 | SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN); |
| 396 | edev->component_id = mi_resp[48] << 8 | mi_resp[49]; |
| 397 | edev->component_revision_id = mi_resp[50]; |
| 398 | } |
| 399 | } |
| 400 | |
| 401 | #define MI_REQ_SIZE 8 |
| 402 | #define MI_RESP_SIZE 64 |
| 403 | |
| 404 | static int sas_ex_manuf_info(struct domain_device *dev) |
| 405 | { |
| 406 | u8 *mi_req; |
| 407 | u8 *mi_resp; |
| 408 | int res; |
| 409 | |
| 410 | mi_req = alloc_smp_req(MI_REQ_SIZE); |
| 411 | if (!mi_req) |
| 412 | return -ENOMEM; |
| 413 | |
| 414 | mi_resp = alloc_smp_resp(MI_RESP_SIZE); |
| 415 | if (!mi_resp) { |
| 416 | kfree(mi_req); |
| 417 | return -ENOMEM; |
| 418 | } |
| 419 | |
| 420 | mi_req[1] = SMP_REPORT_MANUF_INFO; |
| 421 | |
| 422 | res = smp_execute_task(dev, mi_req, MI_REQ_SIZE, mi_resp,MI_RESP_SIZE); |
| 423 | if (res) { |
| 424 | SAS_DPRINTK("MI: ex %016llx failed:0x%x\n", |
| 425 | SAS_ADDR(dev->sas_addr), res); |
| 426 | goto out; |
| 427 | } else if (mi_resp[2] != SMP_RESP_FUNC_ACC) { |
| 428 | SAS_DPRINTK("MI ex %016llx returned SMP result:0x%x\n", |
| 429 | SAS_ADDR(dev->sas_addr), mi_resp[2]); |
| 430 | goto out; |
| 431 | } |
| 432 | |
| 433 | ex_assign_manuf_info(dev, mi_resp); |
| 434 | out: |
| 435 | kfree(mi_req); |
| 436 | kfree(mi_resp); |
| 437 | return res; |
| 438 | } |
| 439 | |
| 440 | #define PC_REQ_SIZE 44 |
| 441 | #define PC_RESP_SIZE 8 |
| 442 | |
| 443 | int sas_smp_phy_control(struct domain_device *dev, int phy_id, |
James Bottomley | a01e70e | 2006-09-06 19:28:07 -0500 | [diff] [blame] | 444 | enum phy_func phy_func, |
| 445 | struct sas_phy_linkrates *rates) |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 446 | { |
| 447 | u8 *pc_req; |
| 448 | u8 *pc_resp; |
| 449 | int res; |
| 450 | |
| 451 | pc_req = alloc_smp_req(PC_REQ_SIZE); |
| 452 | if (!pc_req) |
| 453 | return -ENOMEM; |
| 454 | |
| 455 | pc_resp = alloc_smp_resp(PC_RESP_SIZE); |
| 456 | if (!pc_resp) { |
| 457 | kfree(pc_req); |
| 458 | return -ENOMEM; |
| 459 | } |
| 460 | |
| 461 | pc_req[1] = SMP_PHY_CONTROL; |
| 462 | pc_req[9] = phy_id; |
| 463 | pc_req[10]= phy_func; |
James Bottomley | a01e70e | 2006-09-06 19:28:07 -0500 | [diff] [blame] | 464 | if (rates) { |
| 465 | pc_req[32] = rates->minimum_linkrate << 4; |
| 466 | pc_req[33] = rates->maximum_linkrate << 4; |
| 467 | } |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 468 | |
| 469 | res = smp_execute_task(dev, pc_req, PC_REQ_SIZE, pc_resp,PC_RESP_SIZE); |
| 470 | |
| 471 | kfree(pc_resp); |
| 472 | kfree(pc_req); |
| 473 | return res; |
| 474 | } |
| 475 | |
| 476 | static void sas_ex_disable_phy(struct domain_device *dev, int phy_id) |
| 477 | { |
| 478 | struct expander_device *ex = &dev->ex_dev; |
| 479 | struct ex_phy *phy = &ex->ex_phy[phy_id]; |
| 480 | |
James Bottomley | a01e70e | 2006-09-06 19:28:07 -0500 | [diff] [blame] | 481 | sas_smp_phy_control(dev, phy_id, PHY_FUNC_DISABLE, NULL); |
James Bottomley | 88edf74 | 2006-09-06 17:36:13 -0500 | [diff] [blame] | 482 | phy->linkrate = SAS_PHY_DISABLED; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 483 | } |
| 484 | |
| 485 | static void sas_ex_disable_port(struct domain_device *dev, u8 *sas_addr) |
| 486 | { |
| 487 | struct expander_device *ex = &dev->ex_dev; |
| 488 | int i; |
| 489 | |
| 490 | for (i = 0; i < ex->num_phys; i++) { |
| 491 | struct ex_phy *phy = &ex->ex_phy[i]; |
| 492 | |
| 493 | if (phy->phy_state == PHY_VACANT || |
| 494 | phy->phy_state == PHY_NOT_PRESENT) |
| 495 | continue; |
| 496 | |
| 497 | if (SAS_ADDR(phy->attached_sas_addr) == SAS_ADDR(sas_addr)) |
| 498 | sas_ex_disable_phy(dev, i); |
| 499 | } |
| 500 | } |
| 501 | |
| 502 | static int sas_dev_present_in_domain(struct asd_sas_port *port, |
| 503 | u8 *sas_addr) |
| 504 | { |
| 505 | struct domain_device *dev; |
| 506 | |
| 507 | if (SAS_ADDR(port->sas_addr) == SAS_ADDR(sas_addr)) |
| 508 | return 1; |
| 509 | list_for_each_entry(dev, &port->dev_list, dev_list_node) { |
| 510 | if (SAS_ADDR(dev->sas_addr) == SAS_ADDR(sas_addr)) |
| 511 | return 1; |
| 512 | } |
| 513 | return 0; |
| 514 | } |
| 515 | |
| 516 | #define RPEL_REQ_SIZE 16 |
| 517 | #define RPEL_RESP_SIZE 32 |
| 518 | int sas_smp_get_phy_events(struct sas_phy *phy) |
| 519 | { |
| 520 | int res; |
Jesper Juhl | 92631fa | 2007-07-28 01:13:33 +0200 | [diff] [blame] | 521 | u8 *req; |
| 522 | u8 *resp; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 523 | struct sas_rphy *rphy = dev_to_rphy(phy->dev.parent); |
| 524 | struct domain_device *dev = sas_find_dev_by_rphy(rphy); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 525 | |
Jesper Juhl | 92631fa | 2007-07-28 01:13:33 +0200 | [diff] [blame] | 526 | req = alloc_smp_req(RPEL_REQ_SIZE); |
| 527 | if (!req) |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 528 | return -ENOMEM; |
| 529 | |
Jesper Juhl | 92631fa | 2007-07-28 01:13:33 +0200 | [diff] [blame] | 530 | resp = alloc_smp_resp(RPEL_RESP_SIZE); |
| 531 | if (!resp) { |
| 532 | kfree(req); |
| 533 | return -ENOMEM; |
| 534 | } |
| 535 | |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 536 | req[1] = SMP_REPORT_PHY_ERR_LOG; |
| 537 | req[9] = phy->number; |
| 538 | |
| 539 | res = smp_execute_task(dev, req, RPEL_REQ_SIZE, |
| 540 | resp, RPEL_RESP_SIZE); |
| 541 | |
| 542 | if (!res) |
| 543 | goto out; |
| 544 | |
| 545 | phy->invalid_dword_count = scsi_to_u32(&resp[12]); |
| 546 | phy->running_disparity_error_count = scsi_to_u32(&resp[16]); |
| 547 | phy->loss_of_dword_sync_count = scsi_to_u32(&resp[20]); |
| 548 | phy->phy_reset_problem_count = scsi_to_u32(&resp[24]); |
| 549 | |
| 550 | out: |
| 551 | kfree(resp); |
| 552 | return res; |
| 553 | |
| 554 | } |
| 555 | |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 556 | #ifdef CONFIG_SCSI_SAS_ATA |
| 557 | |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 558 | #define RPS_REQ_SIZE 16 |
| 559 | #define RPS_RESP_SIZE 60 |
| 560 | |
| 561 | static int sas_get_report_phy_sata(struct domain_device *dev, |
| 562 | int phy_id, |
| 563 | struct smp_resp *rps_resp) |
| 564 | { |
| 565 | int res; |
| 566 | u8 *rps_req = alloc_smp_req(RPS_REQ_SIZE); |
James Bottomley | 1acce19 | 2006-08-22 12:39:19 -0500 | [diff] [blame] | 567 | u8 *resp = (u8 *)rps_resp; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 568 | |
| 569 | if (!rps_req) |
| 570 | return -ENOMEM; |
| 571 | |
| 572 | rps_req[1] = SMP_REPORT_PHY_SATA; |
| 573 | rps_req[9] = phy_id; |
| 574 | |
| 575 | res = smp_execute_task(dev, rps_req, RPS_REQ_SIZE, |
| 576 | rps_resp, RPS_RESP_SIZE); |
| 577 | |
James Bottomley | 1acce19 | 2006-08-22 12:39:19 -0500 | [diff] [blame] | 578 | /* 0x34 is the FIS type for the D2H fis. There's a potential |
| 579 | * standards cockup here. sas-2 explicitly specifies the FIS |
| 580 | * should be encoded so that FIS type is in resp[24]. |
| 581 | * However, some expanders endian reverse this. Undo the |
| 582 | * reversal here */ |
| 583 | if (!res && resp[27] == 0x34 && resp[24] != 0x34) { |
| 584 | int i; |
| 585 | |
| 586 | for (i = 0; i < 5; i++) { |
| 587 | int j = 24 + (i*4); |
| 588 | u8 a, b; |
| 589 | a = resp[j + 0]; |
| 590 | b = resp[j + 1]; |
| 591 | resp[j + 0] = resp[j + 3]; |
| 592 | resp[j + 1] = resp[j + 2]; |
| 593 | resp[j + 2] = b; |
| 594 | resp[j + 3] = a; |
| 595 | } |
| 596 | } |
| 597 | |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 598 | kfree(rps_req); |
James Bottomley | 1acce19 | 2006-08-22 12:39:19 -0500 | [diff] [blame] | 599 | return res; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 600 | } |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 601 | #endif |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 602 | |
| 603 | static void sas_ex_get_linkrate(struct domain_device *parent, |
| 604 | struct domain_device *child, |
| 605 | struct ex_phy *parent_phy) |
| 606 | { |
| 607 | struct expander_device *parent_ex = &parent->ex_dev; |
| 608 | struct sas_port *port; |
| 609 | int i; |
| 610 | |
| 611 | child->pathways = 0; |
| 612 | |
| 613 | port = parent_phy->port; |
| 614 | |
| 615 | for (i = 0; i < parent_ex->num_phys; i++) { |
| 616 | struct ex_phy *phy = &parent_ex->ex_phy[i]; |
| 617 | |
| 618 | if (phy->phy_state == PHY_VACANT || |
| 619 | phy->phy_state == PHY_NOT_PRESENT) |
| 620 | continue; |
| 621 | |
| 622 | if (SAS_ADDR(phy->attached_sas_addr) == |
| 623 | SAS_ADDR(child->sas_addr)) { |
| 624 | |
| 625 | child->min_linkrate = min(parent->min_linkrate, |
| 626 | phy->linkrate); |
| 627 | child->max_linkrate = max(parent->max_linkrate, |
| 628 | phy->linkrate); |
| 629 | child->pathways++; |
| 630 | sas_port_add_phy(port, phy->phy); |
| 631 | } |
| 632 | } |
| 633 | child->linkrate = min(parent_phy->linkrate, child->max_linkrate); |
| 634 | child->pathways = min(child->pathways, parent->pathways); |
| 635 | } |
| 636 | |
| 637 | static struct domain_device *sas_ex_discover_end_dev( |
| 638 | struct domain_device *parent, int phy_id) |
| 639 | { |
| 640 | struct expander_device *parent_ex = &parent->ex_dev; |
| 641 | struct ex_phy *phy = &parent_ex->ex_phy[phy_id]; |
| 642 | struct domain_device *child = NULL; |
| 643 | struct sas_rphy *rphy; |
| 644 | int res; |
| 645 | |
| 646 | if (phy->attached_sata_host || phy->attached_sata_ps) |
| 647 | return NULL; |
| 648 | |
| 649 | child = kzalloc(sizeof(*child), GFP_KERNEL); |
| 650 | if (!child) |
| 651 | return NULL; |
| 652 | |
| 653 | child->parent = parent; |
| 654 | child->port = parent->port; |
| 655 | child->iproto = phy->attached_iproto; |
| 656 | memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE); |
| 657 | sas_hash_addr(child->hashed_sas_addr, child->sas_addr); |
James Bottomley | 024879e | 2006-11-15 18:03:07 -0600 | [diff] [blame] | 658 | if (!phy->port) { |
| 659 | phy->port = sas_port_alloc(&parent->rphy->dev, phy_id); |
| 660 | if (unlikely(!phy->port)) |
| 661 | goto out_err; |
| 662 | if (unlikely(sas_port_add(phy->port) != 0)) { |
| 663 | sas_port_free(phy->port); |
| 664 | goto out_err; |
| 665 | } |
| 666 | } |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 667 | sas_ex_get_linkrate(parent, child, phy); |
| 668 | |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 669 | #ifdef CONFIG_SCSI_SAS_ATA |
Darrick J. Wong | 5929faf | 2007-11-05 11:51:17 -0800 | [diff] [blame] | 670 | if ((phy->attached_tproto & SAS_PROTOCOL_STP) || phy->attached_sata_dev) { |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 671 | child->dev_type = SATA_DEV; |
Darrick J. Wong | 5929faf | 2007-11-05 11:51:17 -0800 | [diff] [blame] | 672 | if (phy->attached_tproto & SAS_PROTOCOL_STP) |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 673 | child->tproto = phy->attached_tproto; |
| 674 | if (phy->attached_sata_dev) |
| 675 | child->tproto |= SATA_DEV; |
| 676 | res = sas_get_report_phy_sata(parent, phy_id, |
| 677 | &child->sata_dev.rps_resp); |
| 678 | if (res) { |
| 679 | SAS_DPRINTK("report phy sata to %016llx:0x%x returned " |
| 680 | "0x%x\n", SAS_ADDR(parent->sas_addr), |
| 681 | phy_id, res); |
James Bottomley | 024879e | 2006-11-15 18:03:07 -0600 | [diff] [blame] | 682 | goto out_free; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 683 | } |
| 684 | memcpy(child->frame_rcvd, &child->sata_dev.rps_resp.rps.fis, |
| 685 | sizeof(struct dev_to_host_fis)); |
James Bottomley | 1acce19 | 2006-08-22 12:39:19 -0500 | [diff] [blame] | 686 | |
| 687 | rphy = sas_end_device_alloc(phy->port); |
James Bottomley | 528fd55 | 2006-10-16 10:57:05 -0500 | [diff] [blame] | 688 | if (unlikely(!rphy)) |
| 689 | goto out_free; |
James Bottomley | 1acce19 | 2006-08-22 12:39:19 -0500 | [diff] [blame] | 690 | |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 691 | sas_init_dev(child); |
James Bottomley | 1acce19 | 2006-08-22 12:39:19 -0500 | [diff] [blame] | 692 | |
| 693 | child->rphy = rphy; |
| 694 | |
James Bottomley | 9d720d8 | 2007-07-16 13:15:51 -0500 | [diff] [blame] | 695 | spin_lock_irq(&parent->port->dev_list_lock); |
James Bottomley | 1acce19 | 2006-08-22 12:39:19 -0500 | [diff] [blame] | 696 | list_add_tail(&child->dev_list_node, &parent->port->dev_list); |
James Bottomley | 9d720d8 | 2007-07-16 13:15:51 -0500 | [diff] [blame] | 697 | spin_unlock_irq(&parent->port->dev_list_lock); |
James Bottomley | 1acce19 | 2006-08-22 12:39:19 -0500 | [diff] [blame] | 698 | |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 699 | res = sas_discover_sata(child); |
| 700 | if (res) { |
| 701 | SAS_DPRINTK("sas_discover_sata() for device %16llx at " |
| 702 | "%016llx:0x%x returned 0x%x\n", |
| 703 | SAS_ADDR(child->sas_addr), |
| 704 | SAS_ADDR(parent->sas_addr), phy_id, res); |
James Bottomley | 1acce19 | 2006-08-22 12:39:19 -0500 | [diff] [blame] | 705 | goto out_list_del; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 706 | } |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 707 | } else |
| 708 | #endif |
Darrick J. Wong | 5929faf | 2007-11-05 11:51:17 -0800 | [diff] [blame] | 709 | if (phy->attached_tproto & SAS_PROTOCOL_SSP) { |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 710 | child->dev_type = SAS_END_DEV; |
| 711 | rphy = sas_end_device_alloc(phy->port); |
| 712 | /* FIXME: error handling */ |
James Bottomley | 024879e | 2006-11-15 18:03:07 -0600 | [diff] [blame] | 713 | if (unlikely(!rphy)) |
| 714 | goto out_free; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 715 | child->tproto = phy->attached_tproto; |
| 716 | sas_init_dev(child); |
| 717 | |
| 718 | child->rphy = rphy; |
| 719 | sas_fill_in_rphy(child, rphy); |
| 720 | |
James Bottomley | 9d720d8 | 2007-07-16 13:15:51 -0500 | [diff] [blame] | 721 | spin_lock_irq(&parent->port->dev_list_lock); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 722 | list_add_tail(&child->dev_list_node, &parent->port->dev_list); |
James Bottomley | 9d720d8 | 2007-07-16 13:15:51 -0500 | [diff] [blame] | 723 | spin_unlock_irq(&parent->port->dev_list_lock); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 724 | |
| 725 | res = sas_discover_end_dev(child); |
| 726 | if (res) { |
| 727 | SAS_DPRINTK("sas_discover_end_dev() for device %16llx " |
| 728 | "at %016llx:0x%x returned 0x%x\n", |
| 729 | SAS_ADDR(child->sas_addr), |
| 730 | SAS_ADDR(parent->sas_addr), phy_id, res); |
James Bottomley | 024879e | 2006-11-15 18:03:07 -0600 | [diff] [blame] | 731 | goto out_list_del; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 732 | } |
| 733 | } else { |
| 734 | SAS_DPRINTK("target proto 0x%x at %016llx:0x%x not handled\n", |
| 735 | phy->attached_tproto, SAS_ADDR(parent->sas_addr), |
| 736 | phy_id); |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 737 | goto out_free; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 738 | } |
| 739 | |
| 740 | list_add_tail(&child->siblings, &parent_ex->children); |
| 741 | return child; |
James Bottomley | 024879e | 2006-11-15 18:03:07 -0600 | [diff] [blame] | 742 | |
| 743 | out_list_del: |
Darrick J. Wong | 6f63caa | 2007-01-26 14:08:43 -0800 | [diff] [blame] | 744 | sas_rphy_free(child->rphy); |
| 745 | child->rphy = NULL; |
James Bottomley | 024879e | 2006-11-15 18:03:07 -0600 | [diff] [blame] | 746 | list_del(&child->dev_list_node); |
James Bottomley | 024879e | 2006-11-15 18:03:07 -0600 | [diff] [blame] | 747 | out_free: |
| 748 | sas_port_delete(phy->port); |
| 749 | out_err: |
| 750 | phy->port = NULL; |
| 751 | kfree(child); |
| 752 | return NULL; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 753 | } |
| 754 | |
Darrick J. Wong | 423f7cf | 2007-01-30 12:07:27 -0800 | [diff] [blame] | 755 | /* See if this phy is part of a wide port */ |
| 756 | static int sas_ex_join_wide_port(struct domain_device *parent, int phy_id) |
| 757 | { |
| 758 | struct ex_phy *phy = &parent->ex_dev.ex_phy[phy_id]; |
| 759 | int i; |
| 760 | |
| 761 | for (i = 0; i < parent->ex_dev.num_phys; i++) { |
| 762 | struct ex_phy *ephy = &parent->ex_dev.ex_phy[i]; |
| 763 | |
| 764 | if (ephy == phy) |
| 765 | continue; |
| 766 | |
| 767 | if (!memcmp(phy->attached_sas_addr, ephy->attached_sas_addr, |
| 768 | SAS_ADDR_SIZE) && ephy->port) { |
| 769 | sas_port_add_phy(ephy->port, phy->phy); |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 770 | phy->port = ephy->port; |
Darrick J. Wong | 423f7cf | 2007-01-30 12:07:27 -0800 | [diff] [blame] | 771 | phy->phy_state = PHY_DEVICE_DISCOVERED; |
| 772 | return 0; |
| 773 | } |
| 774 | } |
| 775 | |
| 776 | return -ENODEV; |
| 777 | } |
| 778 | |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 779 | static struct domain_device *sas_ex_discover_expander( |
| 780 | struct domain_device *parent, int phy_id) |
| 781 | { |
| 782 | struct sas_expander_device *parent_ex = rphy_to_expander_device(parent->rphy); |
| 783 | struct ex_phy *phy = &parent->ex_dev.ex_phy[phy_id]; |
| 784 | struct domain_device *child = NULL; |
| 785 | struct sas_rphy *rphy; |
| 786 | struct sas_expander_device *edev; |
| 787 | struct asd_sas_port *port; |
| 788 | int res; |
| 789 | |
| 790 | if (phy->routing_attr == DIRECT_ROUTING) { |
| 791 | SAS_DPRINTK("ex %016llx:0x%x:D <--> ex %016llx:0x%x is not " |
| 792 | "allowed\n", |
| 793 | SAS_ADDR(parent->sas_addr), phy_id, |
| 794 | SAS_ADDR(phy->attached_sas_addr), |
| 795 | phy->attached_phy_id); |
| 796 | return NULL; |
| 797 | } |
| 798 | child = kzalloc(sizeof(*child), GFP_KERNEL); |
| 799 | if (!child) |
| 800 | return NULL; |
| 801 | |
| 802 | phy->port = sas_port_alloc(&parent->rphy->dev, phy_id); |
| 803 | /* FIXME: better error handling */ |
| 804 | BUG_ON(sas_port_add(phy->port) != 0); |
| 805 | |
| 806 | |
| 807 | switch (phy->attached_dev_type) { |
| 808 | case EDGE_DEV: |
| 809 | rphy = sas_expander_alloc(phy->port, |
| 810 | SAS_EDGE_EXPANDER_DEVICE); |
| 811 | break; |
| 812 | case FANOUT_DEV: |
| 813 | rphy = sas_expander_alloc(phy->port, |
| 814 | SAS_FANOUT_EXPANDER_DEVICE); |
| 815 | break; |
| 816 | default: |
| 817 | rphy = NULL; /* shut gcc up */ |
| 818 | BUG(); |
| 819 | } |
| 820 | port = parent->port; |
| 821 | child->rphy = rphy; |
| 822 | edev = rphy_to_expander_device(rphy); |
| 823 | child->dev_type = phy->attached_dev_type; |
| 824 | child->parent = parent; |
| 825 | child->port = port; |
| 826 | child->iproto = phy->attached_iproto; |
| 827 | child->tproto = phy->attached_tproto; |
| 828 | memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE); |
| 829 | sas_hash_addr(child->hashed_sas_addr, child->sas_addr); |
| 830 | sas_ex_get_linkrate(parent, child, phy); |
| 831 | edev->level = parent_ex->level + 1; |
| 832 | parent->port->disc.max_level = max(parent->port->disc.max_level, |
| 833 | edev->level); |
| 834 | sas_init_dev(child); |
| 835 | sas_fill_in_rphy(child, rphy); |
| 836 | sas_rphy_add(rphy); |
| 837 | |
James Bottomley | 9d720d8 | 2007-07-16 13:15:51 -0500 | [diff] [blame] | 838 | spin_lock_irq(&parent->port->dev_list_lock); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 839 | list_add_tail(&child->dev_list_node, &parent->port->dev_list); |
James Bottomley | 9d720d8 | 2007-07-16 13:15:51 -0500 | [diff] [blame] | 840 | spin_unlock_irq(&parent->port->dev_list_lock); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 841 | |
| 842 | res = sas_discover_expander(child); |
| 843 | if (res) { |
| 844 | kfree(child); |
| 845 | return NULL; |
| 846 | } |
| 847 | list_add_tail(&child->siblings, &parent->ex_dev.children); |
| 848 | return child; |
| 849 | } |
| 850 | |
| 851 | static int sas_ex_discover_dev(struct domain_device *dev, int phy_id) |
| 852 | { |
| 853 | struct expander_device *ex = &dev->ex_dev; |
| 854 | struct ex_phy *ex_phy = &ex->ex_phy[phy_id]; |
| 855 | struct domain_device *child = NULL; |
| 856 | int res = 0; |
| 857 | |
| 858 | /* Phy state */ |
James Bottomley | 88edf74 | 2006-09-06 17:36:13 -0500 | [diff] [blame] | 859 | if (ex_phy->linkrate == SAS_SATA_SPINUP_HOLD) { |
James Bottomley | a01e70e | 2006-09-06 19:28:07 -0500 | [diff] [blame] | 860 | if (!sas_smp_phy_control(dev, phy_id, PHY_FUNC_LINK_RESET, NULL)) |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 861 | res = sas_ex_phy_discover(dev, phy_id); |
| 862 | if (res) |
| 863 | return res; |
| 864 | } |
| 865 | |
| 866 | /* Parent and domain coherency */ |
| 867 | if (!dev->parent && (SAS_ADDR(ex_phy->attached_sas_addr) == |
| 868 | SAS_ADDR(dev->port->sas_addr))) { |
| 869 | sas_add_parent_port(dev, phy_id); |
| 870 | return 0; |
| 871 | } |
| 872 | if (dev->parent && (SAS_ADDR(ex_phy->attached_sas_addr) == |
| 873 | SAS_ADDR(dev->parent->sas_addr))) { |
| 874 | sas_add_parent_port(dev, phy_id); |
| 875 | if (ex_phy->routing_attr == TABLE_ROUTING) |
| 876 | sas_configure_phy(dev, phy_id, dev->port->sas_addr, 1); |
| 877 | return 0; |
| 878 | } |
| 879 | |
| 880 | if (sas_dev_present_in_domain(dev->port, ex_phy->attached_sas_addr)) |
| 881 | sas_ex_disable_port(dev, ex_phy->attached_sas_addr); |
| 882 | |
| 883 | if (ex_phy->attached_dev_type == NO_DEVICE) { |
| 884 | if (ex_phy->routing_attr == DIRECT_ROUTING) { |
| 885 | memset(ex_phy->attached_sas_addr, 0, SAS_ADDR_SIZE); |
| 886 | sas_configure_routing(dev, ex_phy->attached_sas_addr); |
| 887 | } |
| 888 | return 0; |
James Bottomley | 88edf74 | 2006-09-06 17:36:13 -0500 | [diff] [blame] | 889 | } else if (ex_phy->linkrate == SAS_LINK_RATE_UNKNOWN) |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 890 | return 0; |
| 891 | |
| 892 | if (ex_phy->attached_dev_type != SAS_END_DEV && |
| 893 | ex_phy->attached_dev_type != FANOUT_DEV && |
| 894 | ex_phy->attached_dev_type != EDGE_DEV) { |
| 895 | SAS_DPRINTK("unknown device type(0x%x) attached to ex %016llx " |
| 896 | "phy 0x%x\n", ex_phy->attached_dev_type, |
| 897 | SAS_ADDR(dev->sas_addr), |
| 898 | phy_id); |
| 899 | return 0; |
| 900 | } |
| 901 | |
| 902 | res = sas_configure_routing(dev, ex_phy->attached_sas_addr); |
| 903 | if (res) { |
| 904 | SAS_DPRINTK("configure routing for dev %016llx " |
| 905 | "reported 0x%x. Forgotten\n", |
| 906 | SAS_ADDR(ex_phy->attached_sas_addr), res); |
| 907 | sas_disable_routing(dev, ex_phy->attached_sas_addr); |
| 908 | return res; |
| 909 | } |
| 910 | |
Darrick J. Wong | 423f7cf | 2007-01-30 12:07:27 -0800 | [diff] [blame] | 911 | res = sas_ex_join_wide_port(dev, phy_id); |
| 912 | if (!res) { |
| 913 | SAS_DPRINTK("Attaching ex phy%d to wide port %016llx\n", |
| 914 | phy_id, SAS_ADDR(ex_phy->attached_sas_addr)); |
| 915 | return res; |
| 916 | } |
| 917 | |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 918 | switch (ex_phy->attached_dev_type) { |
| 919 | case SAS_END_DEV: |
| 920 | child = sas_ex_discover_end_dev(dev, phy_id); |
| 921 | break; |
| 922 | case FANOUT_DEV: |
| 923 | if (SAS_ADDR(dev->port->disc.fanout_sas_addr)) { |
| 924 | SAS_DPRINTK("second fanout expander %016llx phy 0x%x " |
| 925 | "attached to ex %016llx phy 0x%x\n", |
| 926 | SAS_ADDR(ex_phy->attached_sas_addr), |
| 927 | ex_phy->attached_phy_id, |
| 928 | SAS_ADDR(dev->sas_addr), |
| 929 | phy_id); |
| 930 | sas_ex_disable_phy(dev, phy_id); |
| 931 | break; |
| 932 | } else |
| 933 | memcpy(dev->port->disc.fanout_sas_addr, |
| 934 | ex_phy->attached_sas_addr, SAS_ADDR_SIZE); |
| 935 | /* fallthrough */ |
| 936 | case EDGE_DEV: |
| 937 | child = sas_ex_discover_expander(dev, phy_id); |
| 938 | break; |
| 939 | default: |
| 940 | break; |
| 941 | } |
| 942 | |
| 943 | if (child) { |
| 944 | int i; |
| 945 | |
| 946 | for (i = 0; i < ex->num_phys; i++) { |
| 947 | if (ex->ex_phy[i].phy_state == PHY_VACANT || |
| 948 | ex->ex_phy[i].phy_state == PHY_NOT_PRESENT) |
| 949 | continue; |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 950 | /* |
| 951 | * Due to races, the phy might not get added to the |
| 952 | * wide port, so we add the phy to the wide port here. |
| 953 | */ |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 954 | if (SAS_ADDR(ex->ex_phy[i].attached_sas_addr) == |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 955 | SAS_ADDR(child->sas_addr)) { |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 956 | ex->ex_phy[i].phy_state= PHY_DEVICE_DISCOVERED; |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 957 | res = sas_ex_join_wide_port(dev, i); |
| 958 | if (!res) |
| 959 | SAS_DPRINTK("Attaching ex phy%d to wide port %016llx\n", |
| 960 | i, SAS_ADDR(ex->ex_phy[i].attached_sas_addr)); |
| 961 | |
| 962 | } |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 963 | } |
| 964 | } |
| 965 | |
| 966 | return res; |
| 967 | } |
| 968 | |
| 969 | static int sas_find_sub_addr(struct domain_device *dev, u8 *sub_addr) |
| 970 | { |
| 971 | struct expander_device *ex = &dev->ex_dev; |
| 972 | int i; |
| 973 | |
| 974 | for (i = 0; i < ex->num_phys; i++) { |
| 975 | struct ex_phy *phy = &ex->ex_phy[i]; |
| 976 | |
| 977 | if (phy->phy_state == PHY_VACANT || |
| 978 | phy->phy_state == PHY_NOT_PRESENT) |
| 979 | continue; |
| 980 | |
| 981 | if ((phy->attached_dev_type == EDGE_DEV || |
| 982 | phy->attached_dev_type == FANOUT_DEV) && |
| 983 | phy->routing_attr == SUBTRACTIVE_ROUTING) { |
| 984 | |
| 985 | memcpy(sub_addr, phy->attached_sas_addr,SAS_ADDR_SIZE); |
| 986 | |
| 987 | return 1; |
| 988 | } |
| 989 | } |
| 990 | return 0; |
| 991 | } |
| 992 | |
| 993 | static int sas_check_level_subtractive_boundary(struct domain_device *dev) |
| 994 | { |
| 995 | struct expander_device *ex = &dev->ex_dev; |
| 996 | struct domain_device *child; |
| 997 | u8 sub_addr[8] = {0, }; |
| 998 | |
| 999 | list_for_each_entry(child, &ex->children, siblings) { |
| 1000 | if (child->dev_type != EDGE_DEV && |
| 1001 | child->dev_type != FANOUT_DEV) |
| 1002 | continue; |
| 1003 | if (sub_addr[0] == 0) { |
| 1004 | sas_find_sub_addr(child, sub_addr); |
| 1005 | continue; |
| 1006 | } else { |
| 1007 | u8 s2[8]; |
| 1008 | |
| 1009 | if (sas_find_sub_addr(child, s2) && |
| 1010 | (SAS_ADDR(sub_addr) != SAS_ADDR(s2))) { |
| 1011 | |
| 1012 | SAS_DPRINTK("ex %016llx->%016llx-?->%016llx " |
| 1013 | "diverges from subtractive " |
| 1014 | "boundary %016llx\n", |
| 1015 | SAS_ADDR(dev->sas_addr), |
| 1016 | SAS_ADDR(child->sas_addr), |
| 1017 | SAS_ADDR(s2), |
| 1018 | SAS_ADDR(sub_addr)); |
| 1019 | |
| 1020 | sas_ex_disable_port(child, s2); |
| 1021 | } |
| 1022 | } |
| 1023 | } |
| 1024 | return 0; |
| 1025 | } |
| 1026 | /** |
| 1027 | * sas_ex_discover_devices -- discover devices attached to this expander |
| 1028 | * dev: pointer to the expander domain device |
| 1029 | * single: if you want to do a single phy, else set to -1; |
| 1030 | * |
| 1031 | * Configure this expander for use with its devices and register the |
| 1032 | * devices of this expander. |
| 1033 | */ |
| 1034 | static int sas_ex_discover_devices(struct domain_device *dev, int single) |
| 1035 | { |
| 1036 | struct expander_device *ex = &dev->ex_dev; |
| 1037 | int i = 0, end = ex->num_phys; |
| 1038 | int res = 0; |
| 1039 | |
| 1040 | if (0 <= single && single < end) { |
| 1041 | i = single; |
| 1042 | end = i+1; |
| 1043 | } |
| 1044 | |
| 1045 | for ( ; i < end; i++) { |
| 1046 | struct ex_phy *ex_phy = &ex->ex_phy[i]; |
| 1047 | |
| 1048 | if (ex_phy->phy_state == PHY_VACANT || |
| 1049 | ex_phy->phy_state == PHY_NOT_PRESENT || |
| 1050 | ex_phy->phy_state == PHY_DEVICE_DISCOVERED) |
| 1051 | continue; |
| 1052 | |
| 1053 | switch (ex_phy->linkrate) { |
James Bottomley | 88edf74 | 2006-09-06 17:36:13 -0500 | [diff] [blame] | 1054 | case SAS_PHY_DISABLED: |
| 1055 | case SAS_PHY_RESET_PROBLEM: |
| 1056 | case SAS_SATA_PORT_SELECTOR: |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1057 | continue; |
| 1058 | default: |
| 1059 | res = sas_ex_discover_dev(dev, i); |
| 1060 | if (res) |
| 1061 | break; |
| 1062 | continue; |
| 1063 | } |
| 1064 | } |
| 1065 | |
| 1066 | if (!res) |
| 1067 | sas_check_level_subtractive_boundary(dev); |
| 1068 | |
| 1069 | return res; |
| 1070 | } |
| 1071 | |
| 1072 | static int sas_check_ex_subtractive_boundary(struct domain_device *dev) |
| 1073 | { |
| 1074 | struct expander_device *ex = &dev->ex_dev; |
| 1075 | int i; |
| 1076 | u8 *sub_sas_addr = NULL; |
| 1077 | |
| 1078 | if (dev->dev_type != EDGE_DEV) |
| 1079 | return 0; |
| 1080 | |
| 1081 | for (i = 0; i < ex->num_phys; i++) { |
| 1082 | struct ex_phy *phy = &ex->ex_phy[i]; |
| 1083 | |
| 1084 | if (phy->phy_state == PHY_VACANT || |
| 1085 | phy->phy_state == PHY_NOT_PRESENT) |
| 1086 | continue; |
| 1087 | |
| 1088 | if ((phy->attached_dev_type == FANOUT_DEV || |
| 1089 | phy->attached_dev_type == EDGE_DEV) && |
| 1090 | phy->routing_attr == SUBTRACTIVE_ROUTING) { |
| 1091 | |
| 1092 | if (!sub_sas_addr) |
| 1093 | sub_sas_addr = &phy->attached_sas_addr[0]; |
| 1094 | else if (SAS_ADDR(sub_sas_addr) != |
| 1095 | SAS_ADDR(phy->attached_sas_addr)) { |
| 1096 | |
| 1097 | SAS_DPRINTK("ex %016llx phy 0x%x " |
| 1098 | "diverges(%016llx) on subtractive " |
| 1099 | "boundary(%016llx). Disabled\n", |
| 1100 | SAS_ADDR(dev->sas_addr), i, |
| 1101 | SAS_ADDR(phy->attached_sas_addr), |
| 1102 | SAS_ADDR(sub_sas_addr)); |
| 1103 | sas_ex_disable_phy(dev, i); |
| 1104 | } |
| 1105 | } |
| 1106 | } |
| 1107 | return 0; |
| 1108 | } |
| 1109 | |
| 1110 | static void sas_print_parent_topology_bug(struct domain_device *child, |
| 1111 | struct ex_phy *parent_phy, |
| 1112 | struct ex_phy *child_phy) |
| 1113 | { |
| 1114 | static const char ra_char[] = { |
| 1115 | [DIRECT_ROUTING] = 'D', |
| 1116 | [SUBTRACTIVE_ROUTING] = 'S', |
| 1117 | [TABLE_ROUTING] = 'T', |
| 1118 | }; |
| 1119 | static const char *ex_type[] = { |
| 1120 | [EDGE_DEV] = "edge", |
| 1121 | [FANOUT_DEV] = "fanout", |
| 1122 | }; |
| 1123 | struct domain_device *parent = child->parent; |
| 1124 | |
| 1125 | sas_printk("%s ex %016llx phy 0x%x <--> %s ex %016llx phy 0x%x " |
| 1126 | "has %c:%c routing link!\n", |
| 1127 | |
| 1128 | ex_type[parent->dev_type], |
| 1129 | SAS_ADDR(parent->sas_addr), |
| 1130 | parent_phy->phy_id, |
| 1131 | |
| 1132 | ex_type[child->dev_type], |
| 1133 | SAS_ADDR(child->sas_addr), |
| 1134 | child_phy->phy_id, |
| 1135 | |
| 1136 | ra_char[parent_phy->routing_attr], |
| 1137 | ra_char[child_phy->routing_attr]); |
| 1138 | } |
| 1139 | |
| 1140 | static int sas_check_eeds(struct domain_device *child, |
| 1141 | struct ex_phy *parent_phy, |
| 1142 | struct ex_phy *child_phy) |
| 1143 | { |
| 1144 | int res = 0; |
| 1145 | struct domain_device *parent = child->parent; |
| 1146 | |
| 1147 | if (SAS_ADDR(parent->port->disc.fanout_sas_addr) != 0) { |
| 1148 | res = -ENODEV; |
| 1149 | SAS_DPRINTK("edge ex %016llx phy S:0x%x <--> edge ex %016llx " |
| 1150 | "phy S:0x%x, while there is a fanout ex %016llx\n", |
| 1151 | SAS_ADDR(parent->sas_addr), |
| 1152 | parent_phy->phy_id, |
| 1153 | SAS_ADDR(child->sas_addr), |
| 1154 | child_phy->phy_id, |
| 1155 | SAS_ADDR(parent->port->disc.fanout_sas_addr)); |
| 1156 | } else if (SAS_ADDR(parent->port->disc.eeds_a) == 0) { |
| 1157 | memcpy(parent->port->disc.eeds_a, parent->sas_addr, |
| 1158 | SAS_ADDR_SIZE); |
| 1159 | memcpy(parent->port->disc.eeds_b, child->sas_addr, |
| 1160 | SAS_ADDR_SIZE); |
| 1161 | } else if (((SAS_ADDR(parent->port->disc.eeds_a) == |
| 1162 | SAS_ADDR(parent->sas_addr)) || |
| 1163 | (SAS_ADDR(parent->port->disc.eeds_a) == |
| 1164 | SAS_ADDR(child->sas_addr))) |
| 1165 | && |
| 1166 | ((SAS_ADDR(parent->port->disc.eeds_b) == |
| 1167 | SAS_ADDR(parent->sas_addr)) || |
| 1168 | (SAS_ADDR(parent->port->disc.eeds_b) == |
| 1169 | SAS_ADDR(child->sas_addr)))) |
| 1170 | ; |
| 1171 | else { |
| 1172 | res = -ENODEV; |
| 1173 | SAS_DPRINTK("edge ex %016llx phy 0x%x <--> edge ex %016llx " |
| 1174 | "phy 0x%x link forms a third EEDS!\n", |
| 1175 | SAS_ADDR(parent->sas_addr), |
| 1176 | parent_phy->phy_id, |
| 1177 | SAS_ADDR(child->sas_addr), |
| 1178 | child_phy->phy_id); |
| 1179 | } |
| 1180 | |
| 1181 | return res; |
| 1182 | } |
| 1183 | |
| 1184 | /* Here we spill over 80 columns. It is intentional. |
| 1185 | */ |
| 1186 | static int sas_check_parent_topology(struct domain_device *child) |
| 1187 | { |
| 1188 | struct expander_device *child_ex = &child->ex_dev; |
| 1189 | struct expander_device *parent_ex; |
| 1190 | int i; |
| 1191 | int res = 0; |
| 1192 | |
| 1193 | if (!child->parent) |
| 1194 | return 0; |
| 1195 | |
| 1196 | if (child->parent->dev_type != EDGE_DEV && |
| 1197 | child->parent->dev_type != FANOUT_DEV) |
| 1198 | return 0; |
| 1199 | |
| 1200 | parent_ex = &child->parent->ex_dev; |
| 1201 | |
| 1202 | for (i = 0; i < parent_ex->num_phys; i++) { |
| 1203 | struct ex_phy *parent_phy = &parent_ex->ex_phy[i]; |
| 1204 | struct ex_phy *child_phy; |
| 1205 | |
| 1206 | if (parent_phy->phy_state == PHY_VACANT || |
| 1207 | parent_phy->phy_state == PHY_NOT_PRESENT) |
| 1208 | continue; |
| 1209 | |
| 1210 | if (SAS_ADDR(parent_phy->attached_sas_addr) != SAS_ADDR(child->sas_addr)) |
| 1211 | continue; |
| 1212 | |
| 1213 | child_phy = &child_ex->ex_phy[parent_phy->attached_phy_id]; |
| 1214 | |
| 1215 | switch (child->parent->dev_type) { |
| 1216 | case EDGE_DEV: |
| 1217 | if (child->dev_type == FANOUT_DEV) { |
| 1218 | if (parent_phy->routing_attr != SUBTRACTIVE_ROUTING || |
| 1219 | child_phy->routing_attr != TABLE_ROUTING) { |
| 1220 | sas_print_parent_topology_bug(child, parent_phy, child_phy); |
| 1221 | res = -ENODEV; |
| 1222 | } |
| 1223 | } else if (parent_phy->routing_attr == SUBTRACTIVE_ROUTING) { |
| 1224 | if (child_phy->routing_attr == SUBTRACTIVE_ROUTING) { |
| 1225 | res = sas_check_eeds(child, parent_phy, child_phy); |
| 1226 | } else if (child_phy->routing_attr != TABLE_ROUTING) { |
| 1227 | sas_print_parent_topology_bug(child, parent_phy, child_phy); |
| 1228 | res = -ENODEV; |
| 1229 | } |
| 1230 | } else if (parent_phy->routing_attr == TABLE_ROUTING && |
| 1231 | child_phy->routing_attr != SUBTRACTIVE_ROUTING) { |
| 1232 | sas_print_parent_topology_bug(child, parent_phy, child_phy); |
| 1233 | res = -ENODEV; |
| 1234 | } |
| 1235 | break; |
| 1236 | case FANOUT_DEV: |
| 1237 | if (parent_phy->routing_attr != TABLE_ROUTING || |
| 1238 | child_phy->routing_attr != SUBTRACTIVE_ROUTING) { |
| 1239 | sas_print_parent_topology_bug(child, parent_phy, child_phy); |
| 1240 | res = -ENODEV; |
| 1241 | } |
| 1242 | break; |
| 1243 | default: |
| 1244 | break; |
| 1245 | } |
| 1246 | } |
| 1247 | |
| 1248 | return res; |
| 1249 | } |
| 1250 | |
| 1251 | #define RRI_REQ_SIZE 16 |
| 1252 | #define RRI_RESP_SIZE 44 |
| 1253 | |
| 1254 | static int sas_configure_present(struct domain_device *dev, int phy_id, |
| 1255 | u8 *sas_addr, int *index, int *present) |
| 1256 | { |
| 1257 | int i, res = 0; |
| 1258 | struct expander_device *ex = &dev->ex_dev; |
| 1259 | struct ex_phy *phy = &ex->ex_phy[phy_id]; |
| 1260 | u8 *rri_req; |
| 1261 | u8 *rri_resp; |
| 1262 | |
| 1263 | *present = 0; |
| 1264 | *index = 0; |
| 1265 | |
| 1266 | rri_req = alloc_smp_req(RRI_REQ_SIZE); |
| 1267 | if (!rri_req) |
| 1268 | return -ENOMEM; |
| 1269 | |
| 1270 | rri_resp = alloc_smp_resp(RRI_RESP_SIZE); |
| 1271 | if (!rri_resp) { |
| 1272 | kfree(rri_req); |
| 1273 | return -ENOMEM; |
| 1274 | } |
| 1275 | |
| 1276 | rri_req[1] = SMP_REPORT_ROUTE_INFO; |
| 1277 | rri_req[9] = phy_id; |
| 1278 | |
| 1279 | for (i = 0; i < ex->max_route_indexes ; i++) { |
| 1280 | *(__be16 *)(rri_req+6) = cpu_to_be16(i); |
| 1281 | res = smp_execute_task(dev, rri_req, RRI_REQ_SIZE, rri_resp, |
| 1282 | RRI_RESP_SIZE); |
| 1283 | if (res) |
| 1284 | goto out; |
| 1285 | res = rri_resp[2]; |
| 1286 | if (res == SMP_RESP_NO_INDEX) { |
| 1287 | SAS_DPRINTK("overflow of indexes: dev %016llx " |
| 1288 | "phy 0x%x index 0x%x\n", |
| 1289 | SAS_ADDR(dev->sas_addr), phy_id, i); |
| 1290 | goto out; |
| 1291 | } else if (res != SMP_RESP_FUNC_ACC) { |
| 1292 | SAS_DPRINTK("%s: dev %016llx phy 0x%x index 0x%x " |
Harvey Harrison | cadbd4a | 2008-07-03 23:47:27 -0700 | [diff] [blame] | 1293 | "result 0x%x\n", __func__, |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1294 | SAS_ADDR(dev->sas_addr), phy_id, i, res); |
| 1295 | goto out; |
| 1296 | } |
| 1297 | if (SAS_ADDR(sas_addr) != 0) { |
| 1298 | if (SAS_ADDR(rri_resp+16) == SAS_ADDR(sas_addr)) { |
| 1299 | *index = i; |
| 1300 | if ((rri_resp[12] & 0x80) == 0x80) |
| 1301 | *present = 0; |
| 1302 | else |
| 1303 | *present = 1; |
| 1304 | goto out; |
| 1305 | } else if (SAS_ADDR(rri_resp+16) == 0) { |
| 1306 | *index = i; |
| 1307 | *present = 0; |
| 1308 | goto out; |
| 1309 | } |
| 1310 | } else if (SAS_ADDR(rri_resp+16) == 0 && |
| 1311 | phy->last_da_index < i) { |
| 1312 | phy->last_da_index = i; |
| 1313 | *index = i; |
| 1314 | *present = 0; |
| 1315 | goto out; |
| 1316 | } |
| 1317 | } |
| 1318 | res = -1; |
| 1319 | out: |
| 1320 | kfree(rri_req); |
| 1321 | kfree(rri_resp); |
| 1322 | return res; |
| 1323 | } |
| 1324 | |
| 1325 | #define CRI_REQ_SIZE 44 |
| 1326 | #define CRI_RESP_SIZE 8 |
| 1327 | |
| 1328 | static int sas_configure_set(struct domain_device *dev, int phy_id, |
| 1329 | u8 *sas_addr, int index, int include) |
| 1330 | { |
| 1331 | int res; |
| 1332 | u8 *cri_req; |
| 1333 | u8 *cri_resp; |
| 1334 | |
| 1335 | cri_req = alloc_smp_req(CRI_REQ_SIZE); |
| 1336 | if (!cri_req) |
| 1337 | return -ENOMEM; |
| 1338 | |
| 1339 | cri_resp = alloc_smp_resp(CRI_RESP_SIZE); |
| 1340 | if (!cri_resp) { |
| 1341 | kfree(cri_req); |
| 1342 | return -ENOMEM; |
| 1343 | } |
| 1344 | |
| 1345 | cri_req[1] = SMP_CONF_ROUTE_INFO; |
| 1346 | *(__be16 *)(cri_req+6) = cpu_to_be16(index); |
| 1347 | cri_req[9] = phy_id; |
| 1348 | if (SAS_ADDR(sas_addr) == 0 || !include) |
| 1349 | cri_req[12] |= 0x80; |
| 1350 | memcpy(cri_req+16, sas_addr, SAS_ADDR_SIZE); |
| 1351 | |
| 1352 | res = smp_execute_task(dev, cri_req, CRI_REQ_SIZE, cri_resp, |
| 1353 | CRI_RESP_SIZE); |
| 1354 | if (res) |
| 1355 | goto out; |
| 1356 | res = cri_resp[2]; |
| 1357 | if (res == SMP_RESP_NO_INDEX) { |
| 1358 | SAS_DPRINTK("overflow of indexes: dev %016llx phy 0x%x " |
| 1359 | "index 0x%x\n", |
| 1360 | SAS_ADDR(dev->sas_addr), phy_id, index); |
| 1361 | } |
| 1362 | out: |
| 1363 | kfree(cri_req); |
| 1364 | kfree(cri_resp); |
| 1365 | return res; |
| 1366 | } |
| 1367 | |
| 1368 | static int sas_configure_phy(struct domain_device *dev, int phy_id, |
| 1369 | u8 *sas_addr, int include) |
| 1370 | { |
| 1371 | int index; |
| 1372 | int present; |
| 1373 | int res; |
| 1374 | |
| 1375 | res = sas_configure_present(dev, phy_id, sas_addr, &index, &present); |
| 1376 | if (res) |
| 1377 | return res; |
| 1378 | if (include ^ present) |
| 1379 | return sas_configure_set(dev, phy_id, sas_addr, index,include); |
| 1380 | |
| 1381 | return res; |
| 1382 | } |
| 1383 | |
| 1384 | /** |
| 1385 | * sas_configure_parent -- configure routing table of parent |
| 1386 | * parent: parent expander |
| 1387 | * child: child expander |
| 1388 | * sas_addr: SAS port identifier of device directly attached to child |
| 1389 | */ |
| 1390 | static int sas_configure_parent(struct domain_device *parent, |
| 1391 | struct domain_device *child, |
| 1392 | u8 *sas_addr, int include) |
| 1393 | { |
| 1394 | struct expander_device *ex_parent = &parent->ex_dev; |
| 1395 | int res = 0; |
| 1396 | int i; |
| 1397 | |
| 1398 | if (parent->parent) { |
| 1399 | res = sas_configure_parent(parent->parent, parent, sas_addr, |
| 1400 | include); |
| 1401 | if (res) |
| 1402 | return res; |
| 1403 | } |
| 1404 | |
| 1405 | if (ex_parent->conf_route_table == 0) { |
| 1406 | SAS_DPRINTK("ex %016llx has self-configuring routing table\n", |
| 1407 | SAS_ADDR(parent->sas_addr)); |
| 1408 | return 0; |
| 1409 | } |
| 1410 | |
| 1411 | for (i = 0; i < ex_parent->num_phys; i++) { |
| 1412 | struct ex_phy *phy = &ex_parent->ex_phy[i]; |
| 1413 | |
| 1414 | if ((phy->routing_attr == TABLE_ROUTING) && |
| 1415 | (SAS_ADDR(phy->attached_sas_addr) == |
| 1416 | SAS_ADDR(child->sas_addr))) { |
| 1417 | res = sas_configure_phy(parent, i, sas_addr, include); |
| 1418 | if (res) |
| 1419 | return res; |
| 1420 | } |
| 1421 | } |
| 1422 | |
| 1423 | return res; |
| 1424 | } |
| 1425 | |
| 1426 | /** |
| 1427 | * sas_configure_routing -- configure routing |
| 1428 | * dev: expander device |
| 1429 | * sas_addr: port identifier of device directly attached to the expander device |
| 1430 | */ |
| 1431 | static int sas_configure_routing(struct domain_device *dev, u8 *sas_addr) |
| 1432 | { |
| 1433 | if (dev->parent) |
| 1434 | return sas_configure_parent(dev->parent, dev, sas_addr, 1); |
| 1435 | return 0; |
| 1436 | } |
| 1437 | |
| 1438 | static int sas_disable_routing(struct domain_device *dev, u8 *sas_addr) |
| 1439 | { |
| 1440 | if (dev->parent) |
| 1441 | return sas_configure_parent(dev->parent, dev, sas_addr, 0); |
| 1442 | return 0; |
| 1443 | } |
| 1444 | |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1445 | /** |
| 1446 | * sas_discover_expander -- expander discovery |
| 1447 | * @ex: pointer to expander domain device |
| 1448 | * |
| 1449 | * See comment in sas_discover_sata(). |
| 1450 | */ |
| 1451 | static int sas_discover_expander(struct domain_device *dev) |
| 1452 | { |
| 1453 | int res; |
| 1454 | |
| 1455 | res = sas_notify_lldd_dev_found(dev); |
| 1456 | if (res) |
| 1457 | return res; |
| 1458 | |
| 1459 | res = sas_ex_general(dev); |
| 1460 | if (res) |
| 1461 | goto out_err; |
| 1462 | res = sas_ex_manuf_info(dev); |
| 1463 | if (res) |
| 1464 | goto out_err; |
| 1465 | |
| 1466 | res = sas_expander_discover(dev); |
| 1467 | if (res) { |
| 1468 | SAS_DPRINTK("expander %016llx discovery failed(0x%x)\n", |
| 1469 | SAS_ADDR(dev->sas_addr), res); |
| 1470 | goto out_err; |
| 1471 | } |
| 1472 | |
| 1473 | sas_check_ex_subtractive_boundary(dev); |
| 1474 | res = sas_check_parent_topology(dev); |
| 1475 | if (res) |
| 1476 | goto out_err; |
| 1477 | return 0; |
| 1478 | out_err: |
| 1479 | sas_notify_lldd_dev_gone(dev); |
| 1480 | return res; |
| 1481 | } |
| 1482 | |
| 1483 | static int sas_ex_level_discovery(struct asd_sas_port *port, const int level) |
| 1484 | { |
| 1485 | int res = 0; |
| 1486 | struct domain_device *dev; |
| 1487 | |
| 1488 | list_for_each_entry(dev, &port->dev_list, dev_list_node) { |
| 1489 | if (dev->dev_type == EDGE_DEV || |
| 1490 | dev->dev_type == FANOUT_DEV) { |
| 1491 | struct sas_expander_device *ex = |
| 1492 | rphy_to_expander_device(dev->rphy); |
| 1493 | |
| 1494 | if (level == ex->level) |
| 1495 | res = sas_ex_discover_devices(dev, -1); |
| 1496 | else if (level > 0) |
| 1497 | res = sas_ex_discover_devices(port->port_dev, -1); |
| 1498 | |
| 1499 | } |
| 1500 | } |
| 1501 | |
| 1502 | return res; |
| 1503 | } |
| 1504 | |
| 1505 | static int sas_ex_bfs_disc(struct asd_sas_port *port) |
| 1506 | { |
| 1507 | int res; |
| 1508 | int level; |
| 1509 | |
| 1510 | do { |
| 1511 | level = port->disc.max_level; |
| 1512 | res = sas_ex_level_discovery(port, level); |
| 1513 | mb(); |
| 1514 | } while (level < port->disc.max_level); |
| 1515 | |
| 1516 | return res; |
| 1517 | } |
| 1518 | |
| 1519 | int sas_discover_root_expander(struct domain_device *dev) |
| 1520 | { |
| 1521 | int res; |
| 1522 | struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy); |
| 1523 | |
Darrick J. Wong | bf45120 | 2007-01-11 14:14:52 -0800 | [diff] [blame] | 1524 | res = sas_rphy_add(dev->rphy); |
| 1525 | if (res) |
| 1526 | goto out_err; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1527 | |
| 1528 | ex->level = dev->port->disc.max_level; /* 0 */ |
| 1529 | res = sas_discover_expander(dev); |
Darrick J. Wong | bf45120 | 2007-01-11 14:14:52 -0800 | [diff] [blame] | 1530 | if (res) |
| 1531 | goto out_err2; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1532 | |
Darrick J. Wong | bf45120 | 2007-01-11 14:14:52 -0800 | [diff] [blame] | 1533 | sas_ex_bfs_disc(dev->port); |
| 1534 | |
| 1535 | return res; |
| 1536 | |
| 1537 | out_err2: |
Darrick J. Wong | 6f63caa | 2007-01-26 14:08:43 -0800 | [diff] [blame] | 1538 | sas_rphy_remove(dev->rphy); |
Darrick J. Wong | bf45120 | 2007-01-11 14:14:52 -0800 | [diff] [blame] | 1539 | out_err: |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1540 | return res; |
| 1541 | } |
| 1542 | |
| 1543 | /* ---------- Domain revalidation ---------- */ |
| 1544 | |
| 1545 | static int sas_get_phy_discover(struct domain_device *dev, |
| 1546 | int phy_id, struct smp_resp *disc_resp) |
| 1547 | { |
| 1548 | int res; |
| 1549 | u8 *disc_req; |
| 1550 | |
| 1551 | disc_req = alloc_smp_req(DISCOVER_REQ_SIZE); |
| 1552 | if (!disc_req) |
| 1553 | return -ENOMEM; |
| 1554 | |
| 1555 | disc_req[1] = SMP_DISCOVER; |
| 1556 | disc_req[9] = phy_id; |
| 1557 | |
| 1558 | res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE, |
| 1559 | disc_resp, DISCOVER_RESP_SIZE); |
| 1560 | if (res) |
| 1561 | goto out; |
| 1562 | else if (disc_resp->result != SMP_RESP_FUNC_ACC) { |
| 1563 | res = disc_resp->result; |
| 1564 | goto out; |
| 1565 | } |
| 1566 | out: |
| 1567 | kfree(disc_req); |
| 1568 | return res; |
| 1569 | } |
| 1570 | |
| 1571 | static int sas_get_phy_change_count(struct domain_device *dev, |
| 1572 | int phy_id, int *pcc) |
| 1573 | { |
| 1574 | int res; |
| 1575 | struct smp_resp *disc_resp; |
| 1576 | |
| 1577 | disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE); |
| 1578 | if (!disc_resp) |
| 1579 | return -ENOMEM; |
| 1580 | |
| 1581 | res = sas_get_phy_discover(dev, phy_id, disc_resp); |
| 1582 | if (!res) |
| 1583 | *pcc = disc_resp->disc.change_count; |
| 1584 | |
| 1585 | kfree(disc_resp); |
| 1586 | return res; |
| 1587 | } |
| 1588 | |
| 1589 | static int sas_get_phy_attached_sas_addr(struct domain_device *dev, |
| 1590 | int phy_id, u8 *attached_sas_addr) |
| 1591 | { |
| 1592 | int res; |
| 1593 | struct smp_resp *disc_resp; |
| 1594 | struct discover_resp *dr; |
| 1595 | |
| 1596 | disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE); |
| 1597 | if (!disc_resp) |
| 1598 | return -ENOMEM; |
| 1599 | dr = &disc_resp->disc; |
| 1600 | |
| 1601 | res = sas_get_phy_discover(dev, phy_id, disc_resp); |
| 1602 | if (!res) { |
| 1603 | memcpy(attached_sas_addr,disc_resp->disc.attached_sas_addr,8); |
| 1604 | if (dr->attached_dev_type == 0) |
| 1605 | memset(attached_sas_addr, 0, 8); |
| 1606 | } |
| 1607 | kfree(disc_resp); |
| 1608 | return res; |
| 1609 | } |
| 1610 | |
| 1611 | static int sas_find_bcast_phy(struct domain_device *dev, int *phy_id, |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1612 | int from_phy, bool update) |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1613 | { |
| 1614 | struct expander_device *ex = &dev->ex_dev; |
| 1615 | int res = 0; |
| 1616 | int i; |
| 1617 | |
| 1618 | for (i = from_phy; i < ex->num_phys; i++) { |
| 1619 | int phy_change_count = 0; |
| 1620 | |
| 1621 | res = sas_get_phy_change_count(dev, i, &phy_change_count); |
| 1622 | if (res) |
| 1623 | goto out; |
| 1624 | else if (phy_change_count != ex->ex_phy[i].phy_change_count) { |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1625 | if (update) |
| 1626 | ex->ex_phy[i].phy_change_count = |
| 1627 | phy_change_count; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1628 | *phy_id = i; |
| 1629 | return 0; |
| 1630 | } |
| 1631 | } |
| 1632 | out: |
| 1633 | return res; |
| 1634 | } |
| 1635 | |
| 1636 | static int sas_get_ex_change_count(struct domain_device *dev, int *ecc) |
| 1637 | { |
| 1638 | int res; |
| 1639 | u8 *rg_req; |
| 1640 | struct smp_resp *rg_resp; |
| 1641 | |
| 1642 | rg_req = alloc_smp_req(RG_REQ_SIZE); |
| 1643 | if (!rg_req) |
| 1644 | return -ENOMEM; |
| 1645 | |
| 1646 | rg_resp = alloc_smp_resp(RG_RESP_SIZE); |
| 1647 | if (!rg_resp) { |
| 1648 | kfree(rg_req); |
| 1649 | return -ENOMEM; |
| 1650 | } |
| 1651 | |
| 1652 | rg_req[1] = SMP_REPORT_GENERAL; |
| 1653 | |
| 1654 | res = smp_execute_task(dev, rg_req, RG_REQ_SIZE, rg_resp, |
| 1655 | RG_RESP_SIZE); |
| 1656 | if (res) |
| 1657 | goto out; |
| 1658 | if (rg_resp->result != SMP_RESP_FUNC_ACC) { |
| 1659 | res = rg_resp->result; |
| 1660 | goto out; |
| 1661 | } |
| 1662 | |
| 1663 | *ecc = be16_to_cpu(rg_resp->rg.change_count); |
| 1664 | out: |
| 1665 | kfree(rg_resp); |
| 1666 | kfree(rg_req); |
| 1667 | return res; |
| 1668 | } |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1669 | /** |
| 1670 | * sas_find_bcast_dev - find the device issue BROADCAST(CHANGE). |
| 1671 | * @dev:domain device to be detect. |
| 1672 | * @src_dev: the device which originated BROADCAST(CHANGE). |
| 1673 | * |
| 1674 | * Add self-configuration expander suport. Suppose two expander cascading, |
| 1675 | * when the first level expander is self-configuring, hotplug the disks in |
| 1676 | * second level expander, BROADCAST(CHANGE) will not only be originated |
| 1677 | * in the second level expander, but also be originated in the first level |
| 1678 | * expander (see SAS protocol SAS 2r-14, 7.11 for detail), it is to say, |
| 1679 | * expander changed count in two level expanders will all increment at least |
| 1680 | * once, but the phy which chang count has changed is the source device which |
| 1681 | * we concerned. |
| 1682 | */ |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1683 | |
| 1684 | static int sas_find_bcast_dev(struct domain_device *dev, |
| 1685 | struct domain_device **src_dev) |
| 1686 | { |
| 1687 | struct expander_device *ex = &dev->ex_dev; |
| 1688 | int ex_change_count = -1; |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1689 | int phy_id = -1; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1690 | int res; |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1691 | struct domain_device *ch; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1692 | |
| 1693 | res = sas_get_ex_change_count(dev, &ex_change_count); |
| 1694 | if (res) |
| 1695 | goto out; |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1696 | if (ex_change_count != -1 && ex_change_count != ex->ex_change_count) { |
| 1697 | /* Just detect if this expander phys phy change count changed, |
| 1698 | * in order to determine if this expander originate BROADCAST, |
| 1699 | * and do not update phy change count field in our structure. |
| 1700 | */ |
| 1701 | res = sas_find_bcast_phy(dev, &phy_id, 0, false); |
| 1702 | if (phy_id != -1) { |
| 1703 | *src_dev = dev; |
| 1704 | ex->ex_change_count = ex_change_count; |
| 1705 | SAS_DPRINTK("Expander phy change count has changed\n"); |
| 1706 | return res; |
| 1707 | } else |
| 1708 | SAS_DPRINTK("Expander phys DID NOT change\n"); |
| 1709 | } |
| 1710 | list_for_each_entry(ch, &ex->children, siblings) { |
| 1711 | if (ch->dev_type == EDGE_DEV || ch->dev_type == FANOUT_DEV) { |
| 1712 | res = sas_find_bcast_dev(ch, src_dev); |
| 1713 | if (src_dev) |
| 1714 | return res; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1715 | } |
| 1716 | } |
| 1717 | out: |
| 1718 | return res; |
| 1719 | } |
| 1720 | |
| 1721 | static void sas_unregister_ex_tree(struct domain_device *dev) |
| 1722 | { |
| 1723 | struct expander_device *ex = &dev->ex_dev; |
| 1724 | struct domain_device *child, *n; |
| 1725 | |
| 1726 | list_for_each_entry_safe(child, n, &ex->children, siblings) { |
| 1727 | if (child->dev_type == EDGE_DEV || |
| 1728 | child->dev_type == FANOUT_DEV) |
| 1729 | sas_unregister_ex_tree(child); |
| 1730 | else |
| 1731 | sas_unregister_dev(child); |
| 1732 | } |
| 1733 | sas_unregister_dev(dev); |
| 1734 | } |
| 1735 | |
| 1736 | static void sas_unregister_devs_sas_addr(struct domain_device *parent, |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1737 | int phy_id, bool last) |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1738 | { |
| 1739 | struct expander_device *ex_dev = &parent->ex_dev; |
| 1740 | struct ex_phy *phy = &ex_dev->ex_phy[phy_id]; |
| 1741 | struct domain_device *child, *n; |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1742 | if (last) { |
| 1743 | list_for_each_entry_safe(child, n, |
| 1744 | &ex_dev->children, siblings) { |
| 1745 | if (SAS_ADDR(child->sas_addr) == |
| 1746 | SAS_ADDR(phy->attached_sas_addr)) { |
| 1747 | if (child->dev_type == EDGE_DEV || |
| 1748 | child->dev_type == FANOUT_DEV) |
| 1749 | sas_unregister_ex_tree(child); |
| 1750 | else |
| 1751 | sas_unregister_dev(child); |
| 1752 | break; |
| 1753 | } |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1754 | } |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1755 | sas_disable_routing(parent, phy->attached_sas_addr); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1756 | } |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1757 | memset(phy->attached_sas_addr, 0, SAS_ADDR_SIZE); |
| 1758 | sas_port_delete_phy(phy->port, phy->phy); |
| 1759 | if (phy->port->num_phys == 0) |
| 1760 | sas_port_delete(phy->port); |
| 1761 | phy->port = NULL; |
| 1762 | } |
| 1763 | |
| 1764 | static int sas_discover_bfs_by_root_level(struct domain_device *root, |
| 1765 | const int level) |
| 1766 | { |
| 1767 | struct expander_device *ex_root = &root->ex_dev; |
| 1768 | struct domain_device *child; |
| 1769 | int res = 0; |
| 1770 | |
| 1771 | list_for_each_entry(child, &ex_root->children, siblings) { |
| 1772 | if (child->dev_type == EDGE_DEV || |
| 1773 | child->dev_type == FANOUT_DEV) { |
| 1774 | struct sas_expander_device *ex = |
| 1775 | rphy_to_expander_device(child->rphy); |
| 1776 | |
| 1777 | if (level > ex->level) |
| 1778 | res = sas_discover_bfs_by_root_level(child, |
| 1779 | level); |
| 1780 | else if (level == ex->level) |
| 1781 | res = sas_ex_discover_devices(child, -1); |
| 1782 | } |
| 1783 | } |
| 1784 | return res; |
| 1785 | } |
| 1786 | |
| 1787 | static int sas_discover_bfs_by_root(struct domain_device *dev) |
| 1788 | { |
| 1789 | int res; |
| 1790 | struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy); |
| 1791 | int level = ex->level+1; |
| 1792 | |
| 1793 | res = sas_ex_discover_devices(dev, -1); |
| 1794 | if (res) |
| 1795 | goto out; |
| 1796 | do { |
| 1797 | res = sas_discover_bfs_by_root_level(dev, level); |
| 1798 | mb(); |
| 1799 | level += 1; |
| 1800 | } while (level <= dev->port->disc.max_level); |
| 1801 | out: |
| 1802 | return res; |
| 1803 | } |
| 1804 | |
| 1805 | static int sas_discover_new(struct domain_device *dev, int phy_id) |
| 1806 | { |
| 1807 | struct ex_phy *ex_phy = &dev->ex_dev.ex_phy[phy_id]; |
| 1808 | struct domain_device *child; |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1809 | bool found = false; |
| 1810 | int res, i; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1811 | |
| 1812 | SAS_DPRINTK("ex %016llx phy%d new device attached\n", |
| 1813 | SAS_ADDR(dev->sas_addr), phy_id); |
| 1814 | res = sas_ex_phy_discover(dev, phy_id); |
| 1815 | if (res) |
| 1816 | goto out; |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1817 | /* to support the wide port inserted */ |
| 1818 | for (i = 0; i < dev->ex_dev.num_phys; i++) { |
| 1819 | struct ex_phy *ex_phy_temp = &dev->ex_dev.ex_phy[i]; |
| 1820 | if (i == phy_id) |
| 1821 | continue; |
| 1822 | if (SAS_ADDR(ex_phy_temp->attached_sas_addr) == |
| 1823 | SAS_ADDR(ex_phy->attached_sas_addr)) { |
| 1824 | found = true; |
| 1825 | break; |
| 1826 | } |
| 1827 | } |
| 1828 | if (found) { |
| 1829 | sas_ex_join_wide_port(dev, phy_id); |
| 1830 | return 0; |
| 1831 | } |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1832 | res = sas_ex_discover_devices(dev, phy_id); |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1833 | if (!res) |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1834 | goto out; |
| 1835 | list_for_each_entry(child, &dev->ex_dev.children, siblings) { |
| 1836 | if (SAS_ADDR(child->sas_addr) == |
| 1837 | SAS_ADDR(ex_phy->attached_sas_addr)) { |
| 1838 | if (child->dev_type == EDGE_DEV || |
| 1839 | child->dev_type == FANOUT_DEV) |
| 1840 | res = sas_discover_bfs_by_root(child); |
| 1841 | break; |
| 1842 | } |
| 1843 | } |
| 1844 | out: |
| 1845 | return res; |
| 1846 | } |
| 1847 | |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1848 | static int sas_rediscover_dev(struct domain_device *dev, int phy_id, bool last) |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1849 | { |
| 1850 | struct expander_device *ex = &dev->ex_dev; |
| 1851 | struct ex_phy *phy = &ex->ex_phy[phy_id]; |
| 1852 | u8 attached_sas_addr[8]; |
| 1853 | int res; |
| 1854 | |
| 1855 | res = sas_get_phy_attached_sas_addr(dev, phy_id, attached_sas_addr); |
| 1856 | switch (res) { |
| 1857 | case SMP_RESP_NO_PHY: |
| 1858 | phy->phy_state = PHY_NOT_PRESENT; |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1859 | sas_unregister_devs_sas_addr(dev, phy_id, last); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1860 | goto out; break; |
| 1861 | case SMP_RESP_PHY_VACANT: |
| 1862 | phy->phy_state = PHY_VACANT; |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1863 | sas_unregister_devs_sas_addr(dev, phy_id, last); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1864 | goto out; break; |
| 1865 | case SMP_RESP_FUNC_ACC: |
| 1866 | break; |
| 1867 | } |
| 1868 | |
| 1869 | if (SAS_ADDR(attached_sas_addr) == 0) { |
| 1870 | phy->phy_state = PHY_EMPTY; |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1871 | sas_unregister_devs_sas_addr(dev, phy_id, last); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1872 | } else if (SAS_ADDR(attached_sas_addr) == |
| 1873 | SAS_ADDR(phy->attached_sas_addr)) { |
| 1874 | SAS_DPRINTK("ex %016llx phy 0x%x broadcast flutter\n", |
| 1875 | SAS_ADDR(dev->sas_addr), phy_id); |
James Bottomley | a01e70e | 2006-09-06 19:28:07 -0500 | [diff] [blame] | 1876 | sas_ex_phy_discover(dev, phy_id); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1877 | } else |
| 1878 | res = sas_discover_new(dev, phy_id); |
| 1879 | out: |
| 1880 | return res; |
| 1881 | } |
| 1882 | |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1883 | /** |
| 1884 | * sas_rediscover - revalidate the domain. |
| 1885 | * @dev:domain device to be detect. |
| 1886 | * @phy_id: the phy id will be detected. |
| 1887 | * |
| 1888 | * NOTE: this process _must_ quit (return) as soon as any connection |
| 1889 | * errors are encountered. Connection recovery is done elsewhere. |
| 1890 | * Discover process only interrogates devices in order to discover the |
| 1891 | * domain.For plugging out, we un-register the device only when it is |
| 1892 | * the last phy in the port, for other phys in this port, we just delete it |
| 1893 | * from the port.For inserting, we do discovery when it is the |
| 1894 | * first phy,for other phys in this port, we add it to the port to |
| 1895 | * forming the wide-port. |
| 1896 | */ |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1897 | static int sas_rediscover(struct domain_device *dev, const int phy_id) |
| 1898 | { |
| 1899 | struct expander_device *ex = &dev->ex_dev; |
| 1900 | struct ex_phy *changed_phy = &ex->ex_phy[phy_id]; |
| 1901 | int res = 0; |
| 1902 | int i; |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1903 | bool last = true; /* is this the last phy of the port */ |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1904 | |
| 1905 | SAS_DPRINTK("ex %016llx phy%d originated BROADCAST(CHANGE)\n", |
| 1906 | SAS_ADDR(dev->sas_addr), phy_id); |
| 1907 | |
| 1908 | if (SAS_ADDR(changed_phy->attached_sas_addr) != 0) { |
| 1909 | for (i = 0; i < ex->num_phys; i++) { |
| 1910 | struct ex_phy *phy = &ex->ex_phy[i]; |
| 1911 | |
| 1912 | if (i == phy_id) |
| 1913 | continue; |
| 1914 | if (SAS_ADDR(phy->attached_sas_addr) == |
| 1915 | SAS_ADDR(changed_phy->attached_sas_addr)) { |
| 1916 | SAS_DPRINTK("phy%d part of wide port with " |
| 1917 | "phy%d\n", phy_id, i); |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1918 | last = false; |
| 1919 | break; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1920 | } |
| 1921 | } |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1922 | res = sas_rediscover_dev(dev, phy_id, last); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1923 | } else |
| 1924 | res = sas_discover_new(dev, phy_id); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1925 | return res; |
| 1926 | } |
| 1927 | |
| 1928 | /** |
| 1929 | * sas_revalidate_domain -- revalidate the domain |
| 1930 | * @port: port to the domain of interest |
| 1931 | * |
| 1932 | * NOTE: this process _must_ quit (return) as soon as any connection |
| 1933 | * errors are encountered. Connection recovery is done elsewhere. |
| 1934 | * Discover process only interrogates devices in order to discover the |
| 1935 | * domain. |
| 1936 | */ |
| 1937 | int sas_ex_revalidate_domain(struct domain_device *port_dev) |
| 1938 | { |
| 1939 | int res; |
| 1940 | struct domain_device *dev = NULL; |
| 1941 | |
| 1942 | res = sas_find_bcast_dev(port_dev, &dev); |
| 1943 | if (res) |
| 1944 | goto out; |
| 1945 | if (dev) { |
| 1946 | struct expander_device *ex = &dev->ex_dev; |
| 1947 | int i = 0, phy_id; |
| 1948 | |
| 1949 | do { |
| 1950 | phy_id = -1; |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1951 | res = sas_find_bcast_phy(dev, &phy_id, i, true); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1952 | if (phy_id == -1) |
| 1953 | break; |
| 1954 | res = sas_rediscover(dev, phy_id); |
| 1955 | i = phy_id + 1; |
| 1956 | } while (i < ex->num_phys); |
| 1957 | } |
| 1958 | out: |
| 1959 | return res; |
| 1960 | } |
| 1961 | |
FUJITA Tomonori | ba1fc17 | 2007-07-09 12:52:08 +0900 | [diff] [blame] | 1962 | int sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy, |
| 1963 | struct request *req) |
| 1964 | { |
| 1965 | struct domain_device *dev; |
Darrick J. Wong | 2cd614c | 2007-07-24 09:33:49 -0700 | [diff] [blame] | 1966 | int ret, type; |
FUJITA Tomonori | ba1fc17 | 2007-07-09 12:52:08 +0900 | [diff] [blame] | 1967 | struct request *rsp = req->next_rq; |
| 1968 | |
| 1969 | if (!rsp) { |
| 1970 | printk("%s: space for a smp response is missing\n", |
Harvey Harrison | cadbd4a | 2008-07-03 23:47:27 -0700 | [diff] [blame] | 1971 | __func__); |
FUJITA Tomonori | ba1fc17 | 2007-07-09 12:52:08 +0900 | [diff] [blame] | 1972 | return -EINVAL; |
| 1973 | } |
| 1974 | |
Darrick J. Wong | 2cd614c | 2007-07-24 09:33:49 -0700 | [diff] [blame] | 1975 | /* no rphy means no smp target support (ie aic94xx host) */ |
James Bottomley | b98e66f | 2007-12-28 16:35:17 -0600 | [diff] [blame] | 1976 | if (!rphy) |
| 1977 | return sas_smp_host_handler(shost, req, rsp); |
| 1978 | |
Darrick J. Wong | 2cd614c | 2007-07-24 09:33:49 -0700 | [diff] [blame] | 1979 | type = rphy->identify.device_type; |
FUJITA Tomonori | ba1fc17 | 2007-07-09 12:52:08 +0900 | [diff] [blame] | 1980 | |
| 1981 | if (type != SAS_EDGE_EXPANDER_DEVICE && |
| 1982 | type != SAS_FANOUT_EXPANDER_DEVICE) { |
| 1983 | printk("%s: can we send a smp request to a device?\n", |
Harvey Harrison | cadbd4a | 2008-07-03 23:47:27 -0700 | [diff] [blame] | 1984 | __func__); |
FUJITA Tomonori | ba1fc17 | 2007-07-09 12:52:08 +0900 | [diff] [blame] | 1985 | return -EINVAL; |
| 1986 | } |
| 1987 | |
| 1988 | dev = sas_find_dev_by_rphy(rphy); |
| 1989 | if (!dev) { |
Harvey Harrison | cadbd4a | 2008-07-03 23:47:27 -0700 | [diff] [blame] | 1990 | printk("%s: fail to find a domain_device?\n", __func__); |
FUJITA Tomonori | ba1fc17 | 2007-07-09 12:52:08 +0900 | [diff] [blame] | 1991 | return -EINVAL; |
| 1992 | } |
| 1993 | |
| 1994 | /* do we need to support multiple segments? */ |
| 1995 | if (req->bio->bi_vcnt > 1 || rsp->bio->bi_vcnt > 1) { |
| 1996 | printk("%s: multiple segments req %u %u, rsp %u %u\n", |
Tejun Heo | b079041 | 2009-05-07 22:24:42 +0900 | [diff] [blame] | 1997 | __func__, req->bio->bi_vcnt, blk_rq_bytes(req), |
| 1998 | rsp->bio->bi_vcnt, blk_rq_bytes(rsp)); |
FUJITA Tomonori | ba1fc17 | 2007-07-09 12:52:08 +0900 | [diff] [blame] | 1999 | return -EINVAL; |
| 2000 | } |
| 2001 | |
Tejun Heo | b079041 | 2009-05-07 22:24:42 +0900 | [diff] [blame] | 2002 | ret = smp_execute_task(dev, bio_data(req->bio), blk_rq_bytes(req), |
| 2003 | bio_data(rsp->bio), blk_rq_bytes(rsp)); |
James Bottomley | 2d4b63e | 2007-12-29 11:49:53 -0600 | [diff] [blame] | 2004 | if (ret > 0) { |
| 2005 | /* positive number is the untransferred residual */ |
Tejun Heo | c3a4d78 | 2009-05-07 22:24:37 +0900 | [diff] [blame] | 2006 | rsp->resid_len = ret; |
Tejun Heo | 5f49f63 | 2009-05-19 18:33:05 +0900 | [diff] [blame] | 2007 | req->resid_len = 0; |
James Bottomley | 2d4b63e | 2007-12-29 11:49:53 -0600 | [diff] [blame] | 2008 | ret = 0; |
Tejun Heo | 5f49f63 | 2009-05-19 18:33:05 +0900 | [diff] [blame] | 2009 | } else if (ret == 0) { |
| 2010 | rsp->resid_len = 0; |
| 2011 | req->resid_len = 0; |
James Bottomley | 2d4b63e | 2007-12-29 11:49:53 -0600 | [diff] [blame] | 2012 | } |
FUJITA Tomonori | ba1fc17 | 2007-07-09 12:52:08 +0900 | [diff] [blame] | 2013 | |
| 2014 | return ret; |
| 2015 | } |