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 | |
Dan Williams | b52df41 | 2011-11-30 23:23:33 -0800 | [diff] [blame] | 31 | #include <scsi/sas_ata.h> |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 32 | #include <scsi/scsi_transport.h> |
| 33 | #include <scsi/scsi_transport_sas.h> |
| 34 | #include "../scsi_sas_internal.h" |
| 35 | |
| 36 | static int sas_discover_expander(struct domain_device *dev); |
| 37 | static int sas_configure_routing(struct domain_device *dev, u8 *sas_addr); |
| 38 | static int sas_configure_phy(struct domain_device *dev, int phy_id, |
| 39 | u8 *sas_addr, int include); |
| 40 | static int sas_disable_routing(struct domain_device *dev, u8 *sas_addr); |
| 41 | |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 42 | /* ---------- SMP task management ---------- */ |
| 43 | |
| 44 | static void smp_task_timedout(unsigned long _task) |
| 45 | { |
| 46 | struct sas_task *task = (void *) _task; |
| 47 | unsigned long flags; |
| 48 | |
| 49 | spin_lock_irqsave(&task->task_state_lock, flags); |
| 50 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) |
| 51 | task->task_state_flags |= SAS_TASK_STATE_ABORTED; |
| 52 | spin_unlock_irqrestore(&task->task_state_lock, flags); |
| 53 | |
| 54 | complete(&task->completion); |
| 55 | } |
| 56 | |
| 57 | static void smp_task_done(struct sas_task *task) |
| 58 | { |
| 59 | if (!del_timer(&task->timer)) |
| 60 | return; |
| 61 | complete(&task->completion); |
| 62 | } |
| 63 | |
| 64 | /* Give it some long enough timeout. In seconds. */ |
| 65 | #define SMP_TIMEOUT 10 |
| 66 | |
| 67 | static int smp_execute_task(struct domain_device *dev, void *req, int req_size, |
| 68 | void *resp, int resp_size) |
| 69 | { |
malahal@us.ibm.com | 42961ee | 2006-10-04 17:34:03 -0700 | [diff] [blame] | 70 | int res, retry; |
| 71 | struct sas_task *task = NULL; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 72 | struct sas_internal *i = |
| 73 | to_sas_internal(dev->port->ha->core.shost->transportt); |
| 74 | |
Jeff Skirvin | 89d3cf6 | 2011-11-16 09:44:13 +0000 | [diff] [blame] | 75 | mutex_lock(&dev->ex_dev.cmd_mutex); |
malahal@us.ibm.com | 42961ee | 2006-10-04 17:34:03 -0700 | [diff] [blame] | 76 | for (retry = 0; retry < 3; retry++) { |
Dan Williams | 3a9c556 | 2011-12-21 15:19:56 -0800 | [diff] [blame] | 77 | if (test_bit(SAS_DEV_GONE, &dev->state)) { |
| 78 | res = -ECOMM; |
| 79 | break; |
| 80 | } |
| 81 | |
malahal@us.ibm.com | 42961ee | 2006-10-04 17:34:03 -0700 | [diff] [blame] | 82 | task = sas_alloc_task(GFP_KERNEL); |
Jeff Skirvin | 89d3cf6 | 2011-11-16 09:44:13 +0000 | [diff] [blame] | 83 | if (!task) { |
| 84 | res = -ENOMEM; |
| 85 | break; |
| 86 | } |
malahal@us.ibm.com | 42961ee | 2006-10-04 17:34:03 -0700 | [diff] [blame] | 87 | task->dev = dev; |
| 88 | task->task_proto = dev->tproto; |
| 89 | sg_init_one(&task->smp_task.smp_req, req, req_size); |
| 90 | sg_init_one(&task->smp_task.smp_resp, resp, resp_size); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 91 | |
malahal@us.ibm.com | 42961ee | 2006-10-04 17:34:03 -0700 | [diff] [blame] | 92 | task->task_done = smp_task_done; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 93 | |
malahal@us.ibm.com | 42961ee | 2006-10-04 17:34:03 -0700 | [diff] [blame] | 94 | task->timer.data = (unsigned long) task; |
| 95 | task->timer.function = smp_task_timedout; |
| 96 | task->timer.expires = jiffies + SMP_TIMEOUT*HZ; |
| 97 | add_timer(&task->timer); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 98 | |
malahal@us.ibm.com | 42961ee | 2006-10-04 17:34:03 -0700 | [diff] [blame] | 99 | res = i->dft->lldd_execute_task(task, 1, GFP_KERNEL); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 100 | |
malahal@us.ibm.com | 42961ee | 2006-10-04 17:34:03 -0700 | [diff] [blame] | 101 | if (res) { |
| 102 | del_timer(&task->timer); |
| 103 | SAS_DPRINTK("executing SMP task failed:%d\n", res); |
Jeff Skirvin | 89d3cf6 | 2011-11-16 09:44:13 +0000 | [diff] [blame] | 104 | break; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 105 | } |
malahal@us.ibm.com | 42961ee | 2006-10-04 17:34:03 -0700 | [diff] [blame] | 106 | |
| 107 | wait_for_completion(&task->completion); |
James Bottomley | 32e8ae3 | 2007-12-30 12:37:31 -0600 | [diff] [blame] | 108 | res = -ECOMM; |
malahal@us.ibm.com | 42961ee | 2006-10-04 17:34:03 -0700 | [diff] [blame] | 109 | if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) { |
| 110 | SAS_DPRINTK("smp task timed out or aborted\n"); |
| 111 | i->dft->lldd_abort_task(task); |
| 112 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) { |
| 113 | SAS_DPRINTK("SMP task aborted and not done\n"); |
Jeff Skirvin | 89d3cf6 | 2011-11-16 09:44:13 +0000 | [diff] [blame] | 114 | break; |
malahal@us.ibm.com | 42961ee | 2006-10-04 17:34:03 -0700 | [diff] [blame] | 115 | } |
| 116 | } |
| 117 | if (task->task_status.resp == SAS_TASK_COMPLETE && |
James Bottomley | df64d3c | 2010-07-27 15:51:13 -0500 | [diff] [blame] | 118 | task->task_status.stat == SAM_STAT_GOOD) { |
malahal@us.ibm.com | 42961ee | 2006-10-04 17:34:03 -0700 | [diff] [blame] | 119 | res = 0; |
| 120 | break; |
Jeff Skirvin | 89d3cf6 | 2011-11-16 09:44:13 +0000 | [diff] [blame] | 121 | } |
| 122 | if (task->task_status.resp == SAS_TASK_COMPLETE && |
| 123 | task->task_status.stat == SAS_DATA_UNDERRUN) { |
James Bottomley | 2d4b63e | 2007-12-29 11:49:53 -0600 | [diff] [blame] | 124 | /* no error, but return the number of bytes of |
| 125 | * underrun */ |
| 126 | res = task->task_status.residual; |
| 127 | break; |
Jeff Skirvin | 89d3cf6 | 2011-11-16 09:44:13 +0000 | [diff] [blame] | 128 | } |
| 129 | if (task->task_status.resp == SAS_TASK_COMPLETE && |
| 130 | task->task_status.stat == SAS_DATA_OVERRUN) { |
James Bottomley | 2d4b63e | 2007-12-29 11:49:53 -0600 | [diff] [blame] | 131 | res = -EMSGSIZE; |
| 132 | break; |
Dan Williams | 36a3994 | 2011-11-17 17:59:54 -0800 | [diff] [blame] | 133 | } |
| 134 | if (task->task_status.resp == SAS_TASK_UNDELIVERED && |
| 135 | task->task_status.stat == SAS_DEVICE_UNKNOWN) |
| 136 | break; |
| 137 | else { |
malahal@us.ibm.com | 42961ee | 2006-10-04 17:34:03 -0700 | [diff] [blame] | 138 | SAS_DPRINTK("%s: task to dev %016llx response: 0x%x " |
Harvey Harrison | cadbd4a | 2008-07-03 23:47:27 -0700 | [diff] [blame] | 139 | "status 0x%x\n", __func__, |
malahal@us.ibm.com | 42961ee | 2006-10-04 17:34:03 -0700 | [diff] [blame] | 140 | SAS_ADDR(dev->sas_addr), |
| 141 | task->task_status.resp, |
| 142 | task->task_status.stat); |
| 143 | sas_free_task(task); |
| 144 | task = NULL; |
| 145 | } |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 146 | } |
Jeff Skirvin | 89d3cf6 | 2011-11-16 09:44:13 +0000 | [diff] [blame] | 147 | mutex_unlock(&dev->ex_dev.cmd_mutex); |
| 148 | |
malahal@us.ibm.com | 42961ee | 2006-10-04 17:34:03 -0700 | [diff] [blame] | 149 | BUG_ON(retry == 3 && task != NULL); |
Jeff Skirvin | 89d3cf6 | 2011-11-16 09:44:13 +0000 | [diff] [blame] | 150 | sas_free_task(task); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 151 | return res; |
| 152 | } |
| 153 | |
| 154 | /* ---------- Allocations ---------- */ |
| 155 | |
| 156 | static inline void *alloc_smp_req(int size) |
| 157 | { |
| 158 | u8 *p = kzalloc(size, GFP_KERNEL); |
| 159 | if (p) |
| 160 | p[0] = SMP_REQUEST; |
| 161 | return p; |
| 162 | } |
| 163 | |
| 164 | static inline void *alloc_smp_resp(int size) |
| 165 | { |
| 166 | return kzalloc(size, GFP_KERNEL); |
| 167 | } |
| 168 | |
Dan Williams | d214d81 | 2012-01-16 11:56:50 -0800 | [diff] [blame] | 169 | static char sas_route_char(struct domain_device *dev, struct ex_phy *phy) |
| 170 | { |
| 171 | switch (phy->routing_attr) { |
| 172 | case TABLE_ROUTING: |
| 173 | if (dev->ex_dev.t2t_supp) |
| 174 | return 'U'; |
| 175 | else |
| 176 | return 'T'; |
| 177 | case DIRECT_ROUTING: |
| 178 | return 'D'; |
| 179 | case SUBTRACTIVE_ROUTING: |
| 180 | return 'S'; |
| 181 | default: |
| 182 | return '?'; |
| 183 | } |
| 184 | } |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 185 | |
Dan Williams | 354cf82 | 2012-01-12 17:57:35 -0800 | [diff] [blame] | 186 | static enum sas_dev_type to_dev_type(struct discover_resp *dr) |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 187 | { |
Dan Williams | 354cf82 | 2012-01-12 17:57:35 -0800 | [diff] [blame] | 188 | /* This is detecting a failure to transmit initial dev to host |
| 189 | * FIS as described in section J.5 of sas-2 r16 |
| 190 | */ |
| 191 | if (dr->attached_dev_type == NO_DEVICE && dr->attached_sata_dev && |
| 192 | dr->linkrate >= SAS_LINK_RATE_1_5_GBPS) |
| 193 | return SATA_PENDING; |
| 194 | else |
| 195 | return dr->attached_dev_type; |
| 196 | } |
| 197 | |
| 198 | static void sas_set_ex_phy(struct domain_device *dev, int phy_id, void *rsp) |
| 199 | { |
| 200 | enum sas_dev_type dev_type; |
| 201 | enum sas_linkrate linkrate; |
| 202 | u8 sas_addr[SAS_ADDR_SIZE]; |
| 203 | struct smp_resp *resp = rsp; |
| 204 | struct discover_resp *dr = &resp->disc; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 205 | struct expander_device *ex = &dev->ex_dev; |
| 206 | struct ex_phy *phy = &ex->ex_phy[phy_id]; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 207 | struct sas_rphy *rphy = dev->rphy; |
Dan Williams | d214d81 | 2012-01-16 11:56:50 -0800 | [diff] [blame] | 208 | bool new_phy = !phy->phy; |
| 209 | char *type; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 210 | |
Dan Williams | d214d81 | 2012-01-16 11:56:50 -0800 | [diff] [blame] | 211 | if (new_phy) { |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 212 | phy->phy = sas_phy_alloc(&rphy->dev, phy_id); |
| 213 | |
| 214 | /* FIXME: error_handling */ |
| 215 | BUG_ON(!phy->phy); |
| 216 | } |
| 217 | |
| 218 | switch (resp->result) { |
| 219 | case SMP_RESP_PHY_VACANT: |
| 220 | phy->phy_state = PHY_VACANT; |
Jack Wang | 2bc72c9 | 2010-10-06 16:05:35 +0800 | [diff] [blame] | 221 | break; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 222 | default: |
| 223 | phy->phy_state = PHY_NOT_PRESENT; |
Jack Wang | 2bc72c9 | 2010-10-06 16:05:35 +0800 | [diff] [blame] | 224 | break; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 225 | case SMP_RESP_FUNC_ACC: |
| 226 | phy->phy_state = PHY_EMPTY; /* do not know yet */ |
| 227 | break; |
| 228 | } |
| 229 | |
Dan Williams | 354cf82 | 2012-01-12 17:57:35 -0800 | [diff] [blame] | 230 | /* check if anything important changed to squelch debug */ |
| 231 | dev_type = phy->attached_dev_type; |
| 232 | linkrate = phy->linkrate; |
| 233 | memcpy(sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE); |
| 234 | |
| 235 | phy->attached_dev_type = to_dev_type(dr); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 236 | phy->phy_id = phy_id; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 237 | phy->linkrate = dr->linkrate; |
| 238 | phy->attached_sata_host = dr->attached_sata_host; |
| 239 | phy->attached_sata_dev = dr->attached_sata_dev; |
| 240 | phy->attached_sata_ps = dr->attached_sata_ps; |
| 241 | phy->attached_iproto = dr->iproto << 1; |
| 242 | phy->attached_tproto = dr->tproto << 1; |
| 243 | memcpy(phy->attached_sas_addr, dr->attached_sas_addr, SAS_ADDR_SIZE); |
| 244 | phy->attached_phy_id = dr->attached_phy_id; |
| 245 | phy->phy_change_count = dr->change_count; |
| 246 | phy->routing_attr = dr->routing_attr; |
| 247 | phy->virtual = dr->virtual; |
| 248 | phy->last_da_index = -1; |
| 249 | |
Jack Wang | bb041a0 | 2011-09-23 14:32:32 +0800 | [diff] [blame] | 250 | phy->phy->identify.sas_address = SAS_ADDR(phy->attached_sas_addr); |
Dan Williams | 354cf82 | 2012-01-12 17:57:35 -0800 | [diff] [blame] | 251 | phy->phy->identify.device_type = dr->attached_dev_type; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 252 | phy->phy->identify.initiator_port_protocols = phy->attached_iproto; |
| 253 | phy->phy->identify.target_port_protocols = phy->attached_tproto; |
Dan Williams | 77c309f | 2012-02-08 23:20:41 -0800 | [diff] [blame] | 254 | if (!phy->attached_tproto && dr->attached_sata_dev) |
| 255 | phy->phy->identify.target_port_protocols = SAS_PROTOCOL_SATA; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 256 | phy->phy->identify.phy_identifier = phy_id; |
James Bottomley | a01e70e | 2006-09-06 19:28:07 -0500 | [diff] [blame] | 257 | phy->phy->minimum_linkrate_hw = dr->hmin_linkrate; |
| 258 | phy->phy->maximum_linkrate_hw = dr->hmax_linkrate; |
| 259 | phy->phy->minimum_linkrate = dr->pmin_linkrate; |
| 260 | phy->phy->maximum_linkrate = dr->pmax_linkrate; |
James Bottomley | 88edf74 | 2006-09-06 17:36:13 -0500 | [diff] [blame] | 261 | phy->phy->negotiated_linkrate = phy->linkrate; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 262 | |
Dan Williams | d214d81 | 2012-01-16 11:56:50 -0800 | [diff] [blame] | 263 | if (new_phy) |
Jack Wang | 2bc72c9 | 2010-10-06 16:05:35 +0800 | [diff] [blame] | 264 | if (sas_phy_add(phy->phy)) { |
| 265 | sas_phy_free(phy->phy); |
| 266 | return; |
| 267 | } |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 268 | |
Dan Williams | d214d81 | 2012-01-16 11:56:50 -0800 | [diff] [blame] | 269 | switch (phy->attached_dev_type) { |
Dan Williams | 354cf82 | 2012-01-12 17:57:35 -0800 | [diff] [blame] | 270 | case SATA_PENDING: |
| 271 | type = "stp pending"; |
| 272 | break; |
Dan Williams | d214d81 | 2012-01-16 11:56:50 -0800 | [diff] [blame] | 273 | case NO_DEVICE: |
| 274 | type = "no device"; |
| 275 | break; |
| 276 | case SAS_END_DEV: |
| 277 | if (phy->attached_iproto) { |
| 278 | if (phy->attached_tproto) |
| 279 | type = "host+target"; |
| 280 | else |
| 281 | type = "host"; |
| 282 | } else { |
| 283 | if (dr->attached_sata_dev) |
| 284 | type = "stp"; |
| 285 | else |
| 286 | type = "ssp"; |
| 287 | } |
| 288 | break; |
| 289 | case EDGE_DEV: |
| 290 | case FANOUT_DEV: |
| 291 | type = "smp"; |
| 292 | break; |
| 293 | default: |
| 294 | type = "unknown"; |
| 295 | } |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 296 | |
Dan Williams | 354cf82 | 2012-01-12 17:57:35 -0800 | [diff] [blame] | 297 | /* this routine is polled by libata error recovery so filter |
| 298 | * unimportant messages |
| 299 | */ |
| 300 | if (new_phy || phy->attached_dev_type != dev_type || |
| 301 | phy->linkrate != linkrate || |
| 302 | SAS_ADDR(phy->attached_sas_addr) != SAS_ADDR(sas_addr)) |
| 303 | /* pass */; |
| 304 | else |
| 305 | return; |
| 306 | |
Dan Williams | d214d81 | 2012-01-16 11:56:50 -0800 | [diff] [blame] | 307 | SAS_DPRINTK("ex %016llx phy%02d:%c:%X attached: %016llx (%s)\n", |
| 308 | SAS_ADDR(dev->sas_addr), phy->phy_id, |
| 309 | sas_route_char(dev, phy), phy->linkrate, |
| 310 | SAS_ADDR(phy->attached_sas_addr), type); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 311 | } |
| 312 | |
Dan Williams | b52df41 | 2011-11-30 23:23:33 -0800 | [diff] [blame] | 313 | /* check if we have an existing attached ata device on this expander phy */ |
Dan Williams | 81c757b | 2011-12-02 16:07:01 -0800 | [diff] [blame] | 314 | struct domain_device *sas_ex_to_ata(struct domain_device *ex_dev, int phy_id) |
Dan Williams | b52df41 | 2011-11-30 23:23:33 -0800 | [diff] [blame] | 315 | { |
| 316 | struct ex_phy *ex_phy = &ex_dev->ex_dev.ex_phy[phy_id]; |
| 317 | struct domain_device *dev; |
| 318 | struct sas_rphy *rphy; |
| 319 | |
| 320 | if (!ex_phy->port) |
| 321 | return NULL; |
| 322 | |
| 323 | rphy = ex_phy->port->rphy; |
| 324 | if (!rphy) |
| 325 | return NULL; |
| 326 | |
| 327 | dev = sas_find_dev_by_rphy(rphy); |
| 328 | |
| 329 | if (dev && dev_is_sata(dev)) |
| 330 | return dev; |
| 331 | |
| 332 | return NULL; |
| 333 | } |
| 334 | |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 335 | #define DISCOVER_REQ_SIZE 16 |
| 336 | #define DISCOVER_RESP_SIZE 56 |
| 337 | |
James Bottomley | 1acce19 | 2006-08-22 12:39:19 -0500 | [diff] [blame] | 338 | static int sas_ex_phy_discover_helper(struct domain_device *dev, u8 *disc_req, |
| 339 | u8 *disc_resp, int single) |
| 340 | { |
Dan Williams | 354cf82 | 2012-01-12 17:57:35 -0800 | [diff] [blame] | 341 | struct discover_resp *dr; |
| 342 | int res; |
James Bottomley | 1acce19 | 2006-08-22 12:39:19 -0500 | [diff] [blame] | 343 | |
| 344 | disc_req[9] = single; |
James Bottomley | 1acce19 | 2006-08-22 12:39:19 -0500 | [diff] [blame] | 345 | |
Dan Williams | 354cf82 | 2012-01-12 17:57:35 -0800 | [diff] [blame] | 346 | res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE, |
| 347 | disc_resp, DISCOVER_RESP_SIZE); |
| 348 | if (res) |
| 349 | return res; |
| 350 | dr = &((struct smp_resp *)disc_resp)->disc; |
| 351 | if (memcmp(dev->sas_addr, dr->attached_sas_addr, SAS_ADDR_SIZE) == 0) { |
| 352 | sas_printk("Found loopback topology, just ignore it!\n"); |
| 353 | return 0; |
James Bottomley | 1acce19 | 2006-08-22 12:39:19 -0500 | [diff] [blame] | 354 | } |
| 355 | sas_set_ex_phy(dev, single, disc_resp); |
| 356 | return 0; |
| 357 | } |
| 358 | |
Dan Williams | 354cf82 | 2012-01-12 17:57:35 -0800 | [diff] [blame] | 359 | int sas_ex_phy_discover(struct domain_device *dev, int single) |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 360 | { |
| 361 | struct expander_device *ex = &dev->ex_dev; |
| 362 | int res = 0; |
| 363 | u8 *disc_req; |
| 364 | u8 *disc_resp; |
| 365 | |
| 366 | disc_req = alloc_smp_req(DISCOVER_REQ_SIZE); |
| 367 | if (!disc_req) |
| 368 | return -ENOMEM; |
| 369 | |
| 370 | disc_resp = alloc_smp_req(DISCOVER_RESP_SIZE); |
| 371 | if (!disc_resp) { |
| 372 | kfree(disc_req); |
| 373 | return -ENOMEM; |
| 374 | } |
| 375 | |
| 376 | disc_req[1] = SMP_DISCOVER; |
| 377 | |
| 378 | if (0 <= single && single < ex->num_phys) { |
James Bottomley | 1acce19 | 2006-08-22 12:39:19 -0500 | [diff] [blame] | 379 | res = sas_ex_phy_discover_helper(dev, disc_req, disc_resp, single); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 380 | } else { |
| 381 | int i; |
| 382 | |
| 383 | for (i = 0; i < ex->num_phys; i++) { |
James Bottomley | 1acce19 | 2006-08-22 12:39:19 -0500 | [diff] [blame] | 384 | res = sas_ex_phy_discover_helper(dev, disc_req, |
| 385 | disc_resp, i); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 386 | if (res) |
| 387 | goto out_err; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 388 | } |
| 389 | } |
| 390 | out_err: |
| 391 | kfree(disc_resp); |
| 392 | kfree(disc_req); |
| 393 | return res; |
| 394 | } |
| 395 | |
| 396 | static int sas_expander_discover(struct domain_device *dev) |
| 397 | { |
| 398 | struct expander_device *ex = &dev->ex_dev; |
| 399 | int res = -ENOMEM; |
| 400 | |
| 401 | ex->ex_phy = kzalloc(sizeof(*ex->ex_phy)*ex->num_phys, GFP_KERNEL); |
| 402 | if (!ex->ex_phy) |
| 403 | return -ENOMEM; |
| 404 | |
| 405 | res = sas_ex_phy_discover(dev, -1); |
| 406 | if (res) |
| 407 | goto out_err; |
| 408 | |
| 409 | return 0; |
| 410 | out_err: |
| 411 | kfree(ex->ex_phy); |
| 412 | ex->ex_phy = NULL; |
| 413 | return res; |
| 414 | } |
| 415 | |
| 416 | #define MAX_EXPANDER_PHYS 128 |
| 417 | |
| 418 | static void ex_assign_report_general(struct domain_device *dev, |
| 419 | struct smp_resp *resp) |
| 420 | { |
| 421 | struct report_general_resp *rg = &resp->rg; |
| 422 | |
| 423 | dev->ex_dev.ex_change_count = be16_to_cpu(rg->change_count); |
| 424 | dev->ex_dev.max_route_indexes = be16_to_cpu(rg->route_indexes); |
| 425 | dev->ex_dev.num_phys = min(rg->num_phys, (u8)MAX_EXPANDER_PHYS); |
Luben Tuikov | ffaac8f | 2011-09-22 09:41:36 -0700 | [diff] [blame] | 426 | dev->ex_dev.t2t_supp = rg->t2t_supp; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 427 | dev->ex_dev.conf_route_table = rg->conf_route_table; |
| 428 | dev->ex_dev.configuring = rg->configuring; |
| 429 | memcpy(dev->ex_dev.enclosure_logical_id, rg->enclosure_logical_id, 8); |
| 430 | } |
| 431 | |
| 432 | #define RG_REQ_SIZE 8 |
| 433 | #define RG_RESP_SIZE 32 |
| 434 | |
| 435 | static int sas_ex_general(struct domain_device *dev) |
| 436 | { |
| 437 | u8 *rg_req; |
| 438 | struct smp_resp *rg_resp; |
| 439 | int res; |
| 440 | int i; |
| 441 | |
| 442 | rg_req = alloc_smp_req(RG_REQ_SIZE); |
| 443 | if (!rg_req) |
| 444 | return -ENOMEM; |
| 445 | |
| 446 | rg_resp = alloc_smp_resp(RG_RESP_SIZE); |
| 447 | if (!rg_resp) { |
| 448 | kfree(rg_req); |
| 449 | return -ENOMEM; |
| 450 | } |
| 451 | |
| 452 | rg_req[1] = SMP_REPORT_GENERAL; |
| 453 | |
| 454 | for (i = 0; i < 5; i++) { |
| 455 | res = smp_execute_task(dev, rg_req, RG_REQ_SIZE, rg_resp, |
| 456 | RG_RESP_SIZE); |
| 457 | |
| 458 | if (res) { |
| 459 | SAS_DPRINTK("RG to ex %016llx failed:0x%x\n", |
| 460 | SAS_ADDR(dev->sas_addr), res); |
| 461 | goto out; |
| 462 | } else if (rg_resp->result != SMP_RESP_FUNC_ACC) { |
| 463 | SAS_DPRINTK("RG:ex %016llx returned SMP result:0x%x\n", |
| 464 | SAS_ADDR(dev->sas_addr), rg_resp->result); |
| 465 | res = rg_resp->result; |
| 466 | goto out; |
| 467 | } |
| 468 | |
| 469 | ex_assign_report_general(dev, rg_resp); |
| 470 | |
| 471 | if (dev->ex_dev.configuring) { |
| 472 | SAS_DPRINTK("RG: ex %llx self-configuring...\n", |
| 473 | SAS_ADDR(dev->sas_addr)); |
| 474 | schedule_timeout_interruptible(5*HZ); |
| 475 | } else |
| 476 | break; |
| 477 | } |
| 478 | out: |
| 479 | kfree(rg_req); |
| 480 | kfree(rg_resp); |
| 481 | return res; |
| 482 | } |
| 483 | |
| 484 | static void ex_assign_manuf_info(struct domain_device *dev, void |
| 485 | *_mi_resp) |
| 486 | { |
| 487 | u8 *mi_resp = _mi_resp; |
| 488 | struct sas_rphy *rphy = dev->rphy; |
| 489 | struct sas_expander_device *edev = rphy_to_expander_device(rphy); |
| 490 | |
| 491 | memcpy(edev->vendor_id, mi_resp + 12, SAS_EXPANDER_VENDOR_ID_LEN); |
| 492 | memcpy(edev->product_id, mi_resp + 20, SAS_EXPANDER_PRODUCT_ID_LEN); |
| 493 | memcpy(edev->product_rev, mi_resp + 36, |
| 494 | SAS_EXPANDER_PRODUCT_REV_LEN); |
| 495 | |
| 496 | if (mi_resp[8] & 1) { |
| 497 | memcpy(edev->component_vendor_id, mi_resp + 40, |
| 498 | SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN); |
| 499 | edev->component_id = mi_resp[48] << 8 | mi_resp[49]; |
| 500 | edev->component_revision_id = mi_resp[50]; |
| 501 | } |
| 502 | } |
| 503 | |
| 504 | #define MI_REQ_SIZE 8 |
| 505 | #define MI_RESP_SIZE 64 |
| 506 | |
| 507 | static int sas_ex_manuf_info(struct domain_device *dev) |
| 508 | { |
| 509 | u8 *mi_req; |
| 510 | u8 *mi_resp; |
| 511 | int res; |
| 512 | |
| 513 | mi_req = alloc_smp_req(MI_REQ_SIZE); |
| 514 | if (!mi_req) |
| 515 | return -ENOMEM; |
| 516 | |
| 517 | mi_resp = alloc_smp_resp(MI_RESP_SIZE); |
| 518 | if (!mi_resp) { |
| 519 | kfree(mi_req); |
| 520 | return -ENOMEM; |
| 521 | } |
| 522 | |
| 523 | mi_req[1] = SMP_REPORT_MANUF_INFO; |
| 524 | |
| 525 | res = smp_execute_task(dev, mi_req, MI_REQ_SIZE, mi_resp,MI_RESP_SIZE); |
| 526 | if (res) { |
| 527 | SAS_DPRINTK("MI: ex %016llx failed:0x%x\n", |
| 528 | SAS_ADDR(dev->sas_addr), res); |
| 529 | goto out; |
| 530 | } else if (mi_resp[2] != SMP_RESP_FUNC_ACC) { |
| 531 | SAS_DPRINTK("MI ex %016llx returned SMP result:0x%x\n", |
| 532 | SAS_ADDR(dev->sas_addr), mi_resp[2]); |
| 533 | goto out; |
| 534 | } |
| 535 | |
| 536 | ex_assign_manuf_info(dev, mi_resp); |
| 537 | out: |
| 538 | kfree(mi_req); |
| 539 | kfree(mi_resp); |
| 540 | return res; |
| 541 | } |
| 542 | |
| 543 | #define PC_REQ_SIZE 44 |
| 544 | #define PC_RESP_SIZE 8 |
| 545 | |
| 546 | int sas_smp_phy_control(struct domain_device *dev, int phy_id, |
James Bottomley | a01e70e | 2006-09-06 19:28:07 -0500 | [diff] [blame] | 547 | enum phy_func phy_func, |
| 548 | struct sas_phy_linkrates *rates) |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 549 | { |
| 550 | u8 *pc_req; |
| 551 | u8 *pc_resp; |
| 552 | int res; |
| 553 | |
| 554 | pc_req = alloc_smp_req(PC_REQ_SIZE); |
| 555 | if (!pc_req) |
| 556 | return -ENOMEM; |
| 557 | |
| 558 | pc_resp = alloc_smp_resp(PC_RESP_SIZE); |
| 559 | if (!pc_resp) { |
| 560 | kfree(pc_req); |
| 561 | return -ENOMEM; |
| 562 | } |
| 563 | |
| 564 | pc_req[1] = SMP_PHY_CONTROL; |
| 565 | pc_req[9] = phy_id; |
| 566 | pc_req[10]= phy_func; |
James Bottomley | a01e70e | 2006-09-06 19:28:07 -0500 | [diff] [blame] | 567 | if (rates) { |
| 568 | pc_req[32] = rates->minimum_linkrate << 4; |
| 569 | pc_req[33] = rates->maximum_linkrate << 4; |
| 570 | } |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 571 | |
| 572 | res = smp_execute_task(dev, pc_req, PC_REQ_SIZE, pc_resp,PC_RESP_SIZE); |
| 573 | |
| 574 | kfree(pc_resp); |
| 575 | kfree(pc_req); |
| 576 | return res; |
| 577 | } |
| 578 | |
| 579 | static void sas_ex_disable_phy(struct domain_device *dev, int phy_id) |
| 580 | { |
| 581 | struct expander_device *ex = &dev->ex_dev; |
| 582 | struct ex_phy *phy = &ex->ex_phy[phy_id]; |
| 583 | |
James Bottomley | a01e70e | 2006-09-06 19:28:07 -0500 | [diff] [blame] | 584 | sas_smp_phy_control(dev, phy_id, PHY_FUNC_DISABLE, NULL); |
James Bottomley | 88edf74 | 2006-09-06 17:36:13 -0500 | [diff] [blame] | 585 | phy->linkrate = SAS_PHY_DISABLED; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 586 | } |
| 587 | |
| 588 | static void sas_ex_disable_port(struct domain_device *dev, u8 *sas_addr) |
| 589 | { |
| 590 | struct expander_device *ex = &dev->ex_dev; |
| 591 | int i; |
| 592 | |
| 593 | for (i = 0; i < ex->num_phys; i++) { |
| 594 | struct ex_phy *phy = &ex->ex_phy[i]; |
| 595 | |
| 596 | if (phy->phy_state == PHY_VACANT || |
| 597 | phy->phy_state == PHY_NOT_PRESENT) |
| 598 | continue; |
| 599 | |
| 600 | if (SAS_ADDR(phy->attached_sas_addr) == SAS_ADDR(sas_addr)) |
| 601 | sas_ex_disable_phy(dev, i); |
| 602 | } |
| 603 | } |
| 604 | |
| 605 | static int sas_dev_present_in_domain(struct asd_sas_port *port, |
| 606 | u8 *sas_addr) |
| 607 | { |
| 608 | struct domain_device *dev; |
| 609 | |
| 610 | if (SAS_ADDR(port->sas_addr) == SAS_ADDR(sas_addr)) |
| 611 | return 1; |
| 612 | list_for_each_entry(dev, &port->dev_list, dev_list_node) { |
| 613 | if (SAS_ADDR(dev->sas_addr) == SAS_ADDR(sas_addr)) |
| 614 | return 1; |
| 615 | } |
| 616 | return 0; |
| 617 | } |
| 618 | |
| 619 | #define RPEL_REQ_SIZE 16 |
| 620 | #define RPEL_RESP_SIZE 32 |
| 621 | int sas_smp_get_phy_events(struct sas_phy *phy) |
| 622 | { |
| 623 | int res; |
Jesper Juhl | 92631fa | 2007-07-28 01:13:33 +0200 | [diff] [blame] | 624 | u8 *req; |
| 625 | u8 *resp; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 626 | struct sas_rphy *rphy = dev_to_rphy(phy->dev.parent); |
| 627 | struct domain_device *dev = sas_find_dev_by_rphy(rphy); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 628 | |
Jesper Juhl | 92631fa | 2007-07-28 01:13:33 +0200 | [diff] [blame] | 629 | req = alloc_smp_req(RPEL_REQ_SIZE); |
| 630 | if (!req) |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 631 | return -ENOMEM; |
| 632 | |
Jesper Juhl | 92631fa | 2007-07-28 01:13:33 +0200 | [diff] [blame] | 633 | resp = alloc_smp_resp(RPEL_RESP_SIZE); |
| 634 | if (!resp) { |
| 635 | kfree(req); |
| 636 | return -ENOMEM; |
| 637 | } |
| 638 | |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 639 | req[1] = SMP_REPORT_PHY_ERR_LOG; |
| 640 | req[9] = phy->number; |
| 641 | |
| 642 | res = smp_execute_task(dev, req, RPEL_REQ_SIZE, |
| 643 | resp, RPEL_RESP_SIZE); |
| 644 | |
| 645 | if (!res) |
| 646 | goto out; |
| 647 | |
| 648 | phy->invalid_dword_count = scsi_to_u32(&resp[12]); |
| 649 | phy->running_disparity_error_count = scsi_to_u32(&resp[16]); |
| 650 | phy->loss_of_dword_sync_count = scsi_to_u32(&resp[20]); |
| 651 | phy->phy_reset_problem_count = scsi_to_u32(&resp[24]); |
| 652 | |
| 653 | out: |
| 654 | kfree(resp); |
| 655 | return res; |
| 656 | |
| 657 | } |
| 658 | |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 659 | #ifdef CONFIG_SCSI_SAS_ATA |
| 660 | |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 661 | #define RPS_REQ_SIZE 16 |
| 662 | #define RPS_RESP_SIZE 60 |
| 663 | |
Dan Williams | 354cf82 | 2012-01-12 17:57:35 -0800 | [diff] [blame] | 664 | int sas_get_report_phy_sata(struct domain_device *dev, int phy_id, |
| 665 | struct smp_resp *rps_resp) |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 666 | { |
| 667 | int res; |
| 668 | u8 *rps_req = alloc_smp_req(RPS_REQ_SIZE); |
James Bottomley | 1acce19 | 2006-08-22 12:39:19 -0500 | [diff] [blame] | 669 | u8 *resp = (u8 *)rps_resp; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 670 | |
| 671 | if (!rps_req) |
| 672 | return -ENOMEM; |
| 673 | |
| 674 | rps_req[1] = SMP_REPORT_PHY_SATA; |
| 675 | rps_req[9] = phy_id; |
| 676 | |
| 677 | res = smp_execute_task(dev, rps_req, RPS_REQ_SIZE, |
| 678 | rps_resp, RPS_RESP_SIZE); |
| 679 | |
James Bottomley | 1acce19 | 2006-08-22 12:39:19 -0500 | [diff] [blame] | 680 | /* 0x34 is the FIS type for the D2H fis. There's a potential |
| 681 | * standards cockup here. sas-2 explicitly specifies the FIS |
| 682 | * should be encoded so that FIS type is in resp[24]. |
| 683 | * However, some expanders endian reverse this. Undo the |
| 684 | * reversal here */ |
| 685 | if (!res && resp[27] == 0x34 && resp[24] != 0x34) { |
| 686 | int i; |
| 687 | |
| 688 | for (i = 0; i < 5; i++) { |
| 689 | int j = 24 + (i*4); |
| 690 | u8 a, b; |
| 691 | a = resp[j + 0]; |
| 692 | b = resp[j + 1]; |
| 693 | resp[j + 0] = resp[j + 3]; |
| 694 | resp[j + 1] = resp[j + 2]; |
| 695 | resp[j + 2] = b; |
| 696 | resp[j + 3] = a; |
| 697 | } |
| 698 | } |
| 699 | |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 700 | kfree(rps_req); |
James Bottomley | 1acce19 | 2006-08-22 12:39:19 -0500 | [diff] [blame] | 701 | return res; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 702 | } |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 703 | #endif |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 704 | |
| 705 | static void sas_ex_get_linkrate(struct domain_device *parent, |
| 706 | struct domain_device *child, |
| 707 | struct ex_phy *parent_phy) |
| 708 | { |
| 709 | struct expander_device *parent_ex = &parent->ex_dev; |
| 710 | struct sas_port *port; |
| 711 | int i; |
| 712 | |
| 713 | child->pathways = 0; |
| 714 | |
| 715 | port = parent_phy->port; |
| 716 | |
| 717 | for (i = 0; i < parent_ex->num_phys; i++) { |
| 718 | struct ex_phy *phy = &parent_ex->ex_phy[i]; |
| 719 | |
| 720 | if (phy->phy_state == PHY_VACANT || |
| 721 | phy->phy_state == PHY_NOT_PRESENT) |
| 722 | continue; |
| 723 | |
| 724 | if (SAS_ADDR(phy->attached_sas_addr) == |
| 725 | SAS_ADDR(child->sas_addr)) { |
| 726 | |
| 727 | child->min_linkrate = min(parent->min_linkrate, |
| 728 | phy->linkrate); |
| 729 | child->max_linkrate = max(parent->max_linkrate, |
| 730 | phy->linkrate); |
| 731 | child->pathways++; |
| 732 | sas_port_add_phy(port, phy->phy); |
| 733 | } |
| 734 | } |
| 735 | child->linkrate = min(parent_phy->linkrate, child->max_linkrate); |
| 736 | child->pathways = min(child->pathways, parent->pathways); |
| 737 | } |
| 738 | |
| 739 | static struct domain_device *sas_ex_discover_end_dev( |
| 740 | struct domain_device *parent, int phy_id) |
| 741 | { |
| 742 | struct expander_device *parent_ex = &parent->ex_dev; |
| 743 | struct ex_phy *phy = &parent_ex->ex_phy[phy_id]; |
| 744 | struct domain_device *child = NULL; |
| 745 | struct sas_rphy *rphy; |
| 746 | int res; |
| 747 | |
| 748 | if (phy->attached_sata_host || phy->attached_sata_ps) |
| 749 | return NULL; |
| 750 | |
Dan Williams | 735f7d2 | 2011-11-17 17:59:47 -0800 | [diff] [blame] | 751 | child = sas_alloc_device(); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 752 | if (!child) |
| 753 | return NULL; |
| 754 | |
Dan Williams | 735f7d2 | 2011-11-17 17:59:47 -0800 | [diff] [blame] | 755 | kref_get(&parent->kref); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 756 | child->parent = parent; |
| 757 | child->port = parent->port; |
| 758 | child->iproto = phy->attached_iproto; |
| 759 | memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE); |
| 760 | sas_hash_addr(child->hashed_sas_addr, child->sas_addr); |
James Bottomley | 024879e | 2006-11-15 18:03:07 -0600 | [diff] [blame] | 761 | if (!phy->port) { |
| 762 | phy->port = sas_port_alloc(&parent->rphy->dev, phy_id); |
| 763 | if (unlikely(!phy->port)) |
| 764 | goto out_err; |
| 765 | if (unlikely(sas_port_add(phy->port) != 0)) { |
| 766 | sas_port_free(phy->port); |
| 767 | goto out_err; |
| 768 | } |
| 769 | } |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 770 | sas_ex_get_linkrate(parent, child, phy); |
Dan Williams | f41a0c4 | 2011-12-21 21:33:17 -0800 | [diff] [blame] | 771 | sas_device_set_phy(child, phy->port); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 772 | |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 773 | #ifdef CONFIG_SCSI_SAS_ATA |
Darrick J. Wong | 5929faf | 2007-11-05 11:51:17 -0800 | [diff] [blame] | 774 | if ((phy->attached_tproto & SAS_PROTOCOL_STP) || phy->attached_sata_dev) { |
Dan Williams | 354cf82 | 2012-01-12 17:57:35 -0800 | [diff] [blame] | 775 | res = sas_get_ata_info(child, phy); |
| 776 | if (res) |
James Bottomley | 024879e | 2006-11-15 18:03:07 -0600 | [diff] [blame] | 777 | goto out_free; |
James Bottomley | 1acce19 | 2006-08-22 12:39:19 -0500 | [diff] [blame] | 778 | |
| 779 | rphy = sas_end_device_alloc(phy->port); |
James Bottomley | 528fd55 | 2006-10-16 10:57:05 -0500 | [diff] [blame] | 780 | if (unlikely(!rphy)) |
| 781 | goto out_free; |
James Bottomley | 1acce19 | 2006-08-22 12:39:19 -0500 | [diff] [blame] | 782 | |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 783 | sas_init_dev(child); |
James Bottomley | 1acce19 | 2006-08-22 12:39:19 -0500 | [diff] [blame] | 784 | |
| 785 | child->rphy = rphy; |
| 786 | |
Dan Williams | 87c8331 | 2011-11-17 17:59:51 -0800 | [diff] [blame] | 787 | list_add_tail(&child->disco_list_node, &parent->port->disco_list); |
James Bottomley | 1acce19 | 2006-08-22 12:39:19 -0500 | [diff] [blame] | 788 | |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 789 | res = sas_discover_sata(child); |
| 790 | if (res) { |
| 791 | SAS_DPRINTK("sas_discover_sata() for device %16llx at " |
| 792 | "%016llx:0x%x returned 0x%x\n", |
| 793 | SAS_ADDR(child->sas_addr), |
| 794 | SAS_ADDR(parent->sas_addr), phy_id, res); |
James Bottomley | 1acce19 | 2006-08-22 12:39:19 -0500 | [diff] [blame] | 795 | goto out_list_del; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 796 | } |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 797 | } else |
| 798 | #endif |
Darrick J. Wong | 5929faf | 2007-11-05 11:51:17 -0800 | [diff] [blame] | 799 | if (phy->attached_tproto & SAS_PROTOCOL_SSP) { |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 800 | child->dev_type = SAS_END_DEV; |
| 801 | rphy = sas_end_device_alloc(phy->port); |
| 802 | /* FIXME: error handling */ |
James Bottomley | 024879e | 2006-11-15 18:03:07 -0600 | [diff] [blame] | 803 | if (unlikely(!rphy)) |
| 804 | goto out_free; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 805 | child->tproto = phy->attached_tproto; |
| 806 | sas_init_dev(child); |
| 807 | |
| 808 | child->rphy = rphy; |
| 809 | sas_fill_in_rphy(child, rphy); |
| 810 | |
Dan Williams | 92625f9 | 2012-01-18 20:14:01 -0800 | [diff] [blame] | 811 | list_add_tail(&child->disco_list_node, &parent->port->disco_list); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 812 | |
| 813 | res = sas_discover_end_dev(child); |
| 814 | if (res) { |
| 815 | SAS_DPRINTK("sas_discover_end_dev() for device %16llx " |
| 816 | "at %016llx:0x%x returned 0x%x\n", |
| 817 | SAS_ADDR(child->sas_addr), |
| 818 | SAS_ADDR(parent->sas_addr), phy_id, res); |
James Bottomley | 024879e | 2006-11-15 18:03:07 -0600 | [diff] [blame] | 819 | goto out_list_del; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 820 | } |
| 821 | } else { |
| 822 | SAS_DPRINTK("target proto 0x%x at %016llx:0x%x not handled\n", |
| 823 | phy->attached_tproto, SAS_ADDR(parent->sas_addr), |
| 824 | phy_id); |
James Bottomley | b914217 | 2007-07-22 13:15:55 -0500 | [diff] [blame] | 825 | goto out_free; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 826 | } |
| 827 | |
| 828 | list_add_tail(&child->siblings, &parent_ex->children); |
| 829 | return child; |
James Bottomley | 024879e | 2006-11-15 18:03:07 -0600 | [diff] [blame] | 830 | |
| 831 | out_list_del: |
Darrick J. Wong | 6f63caa | 2007-01-26 14:08:43 -0800 | [diff] [blame] | 832 | sas_rphy_free(child->rphy); |
| 833 | child->rphy = NULL; |
Dan Williams | 1a34c06 | 2011-09-21 22:05:34 -0700 | [diff] [blame] | 834 | |
Dan Williams | 87c8331 | 2011-11-17 17:59:51 -0800 | [diff] [blame] | 835 | list_del(&child->disco_list_node); |
Dan Williams | 1a34c06 | 2011-09-21 22:05:34 -0700 | [diff] [blame] | 836 | spin_lock_irq(&parent->port->dev_list_lock); |
James Bottomley | 024879e | 2006-11-15 18:03:07 -0600 | [diff] [blame] | 837 | list_del(&child->dev_list_node); |
Dan Williams | 1a34c06 | 2011-09-21 22:05:34 -0700 | [diff] [blame] | 838 | spin_unlock_irq(&parent->port->dev_list_lock); |
James Bottomley | 024879e | 2006-11-15 18:03:07 -0600 | [diff] [blame] | 839 | out_free: |
| 840 | sas_port_delete(phy->port); |
| 841 | out_err: |
| 842 | phy->port = NULL; |
Dan Williams | 735f7d2 | 2011-11-17 17:59:47 -0800 | [diff] [blame] | 843 | sas_put_device(child); |
James Bottomley | 024879e | 2006-11-15 18:03:07 -0600 | [diff] [blame] | 844 | return NULL; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 845 | } |
| 846 | |
Darrick J. Wong | 423f7cf | 2007-01-30 12:07:27 -0800 | [diff] [blame] | 847 | /* See if this phy is part of a wide port */ |
| 848 | static int sas_ex_join_wide_port(struct domain_device *parent, int phy_id) |
| 849 | { |
| 850 | struct ex_phy *phy = &parent->ex_dev.ex_phy[phy_id]; |
| 851 | int i; |
| 852 | |
| 853 | for (i = 0; i < parent->ex_dev.num_phys; i++) { |
| 854 | struct ex_phy *ephy = &parent->ex_dev.ex_phy[i]; |
| 855 | |
| 856 | if (ephy == phy) |
| 857 | continue; |
| 858 | |
| 859 | if (!memcmp(phy->attached_sas_addr, ephy->attached_sas_addr, |
| 860 | SAS_ADDR_SIZE) && ephy->port) { |
| 861 | sas_port_add_phy(ephy->port, phy->phy); |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 862 | phy->port = ephy->port; |
Darrick J. Wong | 423f7cf | 2007-01-30 12:07:27 -0800 | [diff] [blame] | 863 | phy->phy_state = PHY_DEVICE_DISCOVERED; |
| 864 | return 0; |
| 865 | } |
| 866 | } |
| 867 | |
| 868 | return -ENODEV; |
| 869 | } |
| 870 | |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 871 | static struct domain_device *sas_ex_discover_expander( |
| 872 | struct domain_device *parent, int phy_id) |
| 873 | { |
| 874 | struct sas_expander_device *parent_ex = rphy_to_expander_device(parent->rphy); |
| 875 | struct ex_phy *phy = &parent->ex_dev.ex_phy[phy_id]; |
| 876 | struct domain_device *child = NULL; |
| 877 | struct sas_rphy *rphy; |
| 878 | struct sas_expander_device *edev; |
| 879 | struct asd_sas_port *port; |
| 880 | int res; |
| 881 | |
| 882 | if (phy->routing_attr == DIRECT_ROUTING) { |
| 883 | SAS_DPRINTK("ex %016llx:0x%x:D <--> ex %016llx:0x%x is not " |
| 884 | "allowed\n", |
| 885 | SAS_ADDR(parent->sas_addr), phy_id, |
| 886 | SAS_ADDR(phy->attached_sas_addr), |
| 887 | phy->attached_phy_id); |
| 888 | return NULL; |
| 889 | } |
Dan Williams | 735f7d2 | 2011-11-17 17:59:47 -0800 | [diff] [blame] | 890 | child = sas_alloc_device(); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 891 | if (!child) |
| 892 | return NULL; |
| 893 | |
| 894 | phy->port = sas_port_alloc(&parent->rphy->dev, phy_id); |
| 895 | /* FIXME: better error handling */ |
| 896 | BUG_ON(sas_port_add(phy->port) != 0); |
| 897 | |
| 898 | |
| 899 | switch (phy->attached_dev_type) { |
| 900 | case EDGE_DEV: |
| 901 | rphy = sas_expander_alloc(phy->port, |
| 902 | SAS_EDGE_EXPANDER_DEVICE); |
| 903 | break; |
| 904 | case FANOUT_DEV: |
| 905 | rphy = sas_expander_alloc(phy->port, |
| 906 | SAS_FANOUT_EXPANDER_DEVICE); |
| 907 | break; |
| 908 | default: |
| 909 | rphy = NULL; /* shut gcc up */ |
| 910 | BUG(); |
| 911 | } |
| 912 | port = parent->port; |
| 913 | child->rphy = rphy; |
| 914 | edev = rphy_to_expander_device(rphy); |
| 915 | child->dev_type = phy->attached_dev_type; |
Dan Williams | 735f7d2 | 2011-11-17 17:59:47 -0800 | [diff] [blame] | 916 | kref_get(&parent->kref); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 917 | child->parent = parent; |
| 918 | child->port = port; |
| 919 | child->iproto = phy->attached_iproto; |
| 920 | child->tproto = phy->attached_tproto; |
| 921 | memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE); |
| 922 | sas_hash_addr(child->hashed_sas_addr, child->sas_addr); |
| 923 | sas_ex_get_linkrate(parent, child, phy); |
| 924 | edev->level = parent_ex->level + 1; |
| 925 | parent->port->disc.max_level = max(parent->port->disc.max_level, |
| 926 | edev->level); |
| 927 | sas_init_dev(child); |
| 928 | sas_fill_in_rphy(child, rphy); |
| 929 | sas_rphy_add(rphy); |
| 930 | |
James Bottomley | 9d720d8 | 2007-07-16 13:15:51 -0500 | [diff] [blame] | 931 | spin_lock_irq(&parent->port->dev_list_lock); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 932 | list_add_tail(&child->dev_list_node, &parent->port->dev_list); |
James Bottomley | 9d720d8 | 2007-07-16 13:15:51 -0500 | [diff] [blame] | 933 | spin_unlock_irq(&parent->port->dev_list_lock); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 934 | |
| 935 | res = sas_discover_expander(child); |
| 936 | if (res) { |
Luben Tuikov | 5911e96 | 2011-07-26 23:10:48 -0700 | [diff] [blame] | 937 | spin_lock_irq(&parent->port->dev_list_lock); |
| 938 | list_del(&child->dev_list_node); |
| 939 | spin_unlock_irq(&parent->port->dev_list_lock); |
Dan Williams | 735f7d2 | 2011-11-17 17:59:47 -0800 | [diff] [blame] | 940 | sas_put_device(child); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 941 | return NULL; |
| 942 | } |
| 943 | list_add_tail(&child->siblings, &parent->ex_dev.children); |
| 944 | return child; |
| 945 | } |
| 946 | |
| 947 | static int sas_ex_discover_dev(struct domain_device *dev, int phy_id) |
| 948 | { |
| 949 | struct expander_device *ex = &dev->ex_dev; |
| 950 | struct ex_phy *ex_phy = &ex->ex_phy[phy_id]; |
| 951 | struct domain_device *child = NULL; |
| 952 | int res = 0; |
| 953 | |
| 954 | /* Phy state */ |
James Bottomley | 88edf74 | 2006-09-06 17:36:13 -0500 | [diff] [blame] | 955 | if (ex_phy->linkrate == SAS_SATA_SPINUP_HOLD) { |
James Bottomley | a01e70e | 2006-09-06 19:28:07 -0500 | [diff] [blame] | 956 | 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] | 957 | res = sas_ex_phy_discover(dev, phy_id); |
| 958 | if (res) |
| 959 | return res; |
| 960 | } |
| 961 | |
| 962 | /* Parent and domain coherency */ |
| 963 | if (!dev->parent && (SAS_ADDR(ex_phy->attached_sas_addr) == |
| 964 | SAS_ADDR(dev->port->sas_addr))) { |
| 965 | sas_add_parent_port(dev, phy_id); |
| 966 | return 0; |
| 967 | } |
| 968 | if (dev->parent && (SAS_ADDR(ex_phy->attached_sas_addr) == |
| 969 | SAS_ADDR(dev->parent->sas_addr))) { |
| 970 | sas_add_parent_port(dev, phy_id); |
| 971 | if (ex_phy->routing_attr == TABLE_ROUTING) |
| 972 | sas_configure_phy(dev, phy_id, dev->port->sas_addr, 1); |
| 973 | return 0; |
| 974 | } |
| 975 | |
| 976 | if (sas_dev_present_in_domain(dev->port, ex_phy->attached_sas_addr)) |
| 977 | sas_ex_disable_port(dev, ex_phy->attached_sas_addr); |
| 978 | |
| 979 | if (ex_phy->attached_dev_type == NO_DEVICE) { |
| 980 | if (ex_phy->routing_attr == DIRECT_ROUTING) { |
| 981 | memset(ex_phy->attached_sas_addr, 0, SAS_ADDR_SIZE); |
| 982 | sas_configure_routing(dev, ex_phy->attached_sas_addr); |
| 983 | } |
| 984 | return 0; |
James Bottomley | 88edf74 | 2006-09-06 17:36:13 -0500 | [diff] [blame] | 985 | } else if (ex_phy->linkrate == SAS_LINK_RATE_UNKNOWN) |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 986 | return 0; |
| 987 | |
| 988 | if (ex_phy->attached_dev_type != SAS_END_DEV && |
| 989 | ex_phy->attached_dev_type != FANOUT_DEV && |
Dan Williams | 354cf82 | 2012-01-12 17:57:35 -0800 | [diff] [blame] | 990 | ex_phy->attached_dev_type != EDGE_DEV && |
| 991 | ex_phy->attached_dev_type != SATA_PENDING) { |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 992 | SAS_DPRINTK("unknown device type(0x%x) attached to ex %016llx " |
| 993 | "phy 0x%x\n", ex_phy->attached_dev_type, |
| 994 | SAS_ADDR(dev->sas_addr), |
| 995 | phy_id); |
| 996 | return 0; |
| 997 | } |
| 998 | |
| 999 | res = sas_configure_routing(dev, ex_phy->attached_sas_addr); |
| 1000 | if (res) { |
| 1001 | SAS_DPRINTK("configure routing for dev %016llx " |
| 1002 | "reported 0x%x. Forgotten\n", |
| 1003 | SAS_ADDR(ex_phy->attached_sas_addr), res); |
| 1004 | sas_disable_routing(dev, ex_phy->attached_sas_addr); |
| 1005 | return res; |
| 1006 | } |
| 1007 | |
Darrick J. Wong | 423f7cf | 2007-01-30 12:07:27 -0800 | [diff] [blame] | 1008 | res = sas_ex_join_wide_port(dev, phy_id); |
| 1009 | if (!res) { |
| 1010 | SAS_DPRINTK("Attaching ex phy%d to wide port %016llx\n", |
| 1011 | phy_id, SAS_ADDR(ex_phy->attached_sas_addr)); |
| 1012 | return res; |
| 1013 | } |
| 1014 | |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1015 | switch (ex_phy->attached_dev_type) { |
| 1016 | case SAS_END_DEV: |
Dan Williams | 354cf82 | 2012-01-12 17:57:35 -0800 | [diff] [blame] | 1017 | case SATA_PENDING: |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1018 | child = sas_ex_discover_end_dev(dev, phy_id); |
| 1019 | break; |
| 1020 | case FANOUT_DEV: |
| 1021 | if (SAS_ADDR(dev->port->disc.fanout_sas_addr)) { |
| 1022 | SAS_DPRINTK("second fanout expander %016llx phy 0x%x " |
| 1023 | "attached to ex %016llx phy 0x%x\n", |
| 1024 | SAS_ADDR(ex_phy->attached_sas_addr), |
| 1025 | ex_phy->attached_phy_id, |
| 1026 | SAS_ADDR(dev->sas_addr), |
| 1027 | phy_id); |
| 1028 | sas_ex_disable_phy(dev, phy_id); |
| 1029 | break; |
| 1030 | } else |
| 1031 | memcpy(dev->port->disc.fanout_sas_addr, |
| 1032 | ex_phy->attached_sas_addr, SAS_ADDR_SIZE); |
| 1033 | /* fallthrough */ |
| 1034 | case EDGE_DEV: |
| 1035 | child = sas_ex_discover_expander(dev, phy_id); |
| 1036 | break; |
| 1037 | default: |
| 1038 | break; |
| 1039 | } |
| 1040 | |
| 1041 | if (child) { |
| 1042 | int i; |
| 1043 | |
| 1044 | for (i = 0; i < ex->num_phys; i++) { |
| 1045 | if (ex->ex_phy[i].phy_state == PHY_VACANT || |
| 1046 | ex->ex_phy[i].phy_state == PHY_NOT_PRESENT) |
| 1047 | continue; |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1048 | /* |
| 1049 | * Due to races, the phy might not get added to the |
| 1050 | * wide port, so we add the phy to the wide port here. |
| 1051 | */ |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1052 | if (SAS_ADDR(ex->ex_phy[i].attached_sas_addr) == |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1053 | SAS_ADDR(child->sas_addr)) { |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1054 | ex->ex_phy[i].phy_state= PHY_DEVICE_DISCOVERED; |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1055 | res = sas_ex_join_wide_port(dev, i); |
| 1056 | if (!res) |
| 1057 | SAS_DPRINTK("Attaching ex phy%d to wide port %016llx\n", |
| 1058 | i, SAS_ADDR(ex->ex_phy[i].attached_sas_addr)); |
| 1059 | |
| 1060 | } |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1061 | } |
| 1062 | } |
| 1063 | |
| 1064 | return res; |
| 1065 | } |
| 1066 | |
| 1067 | static int sas_find_sub_addr(struct domain_device *dev, u8 *sub_addr) |
| 1068 | { |
| 1069 | struct expander_device *ex = &dev->ex_dev; |
| 1070 | int i; |
| 1071 | |
| 1072 | for (i = 0; i < ex->num_phys; i++) { |
| 1073 | struct ex_phy *phy = &ex->ex_phy[i]; |
| 1074 | |
| 1075 | if (phy->phy_state == PHY_VACANT || |
| 1076 | phy->phy_state == PHY_NOT_PRESENT) |
| 1077 | continue; |
| 1078 | |
| 1079 | if ((phy->attached_dev_type == EDGE_DEV || |
| 1080 | phy->attached_dev_type == FANOUT_DEV) && |
| 1081 | phy->routing_attr == SUBTRACTIVE_ROUTING) { |
| 1082 | |
| 1083 | memcpy(sub_addr, phy->attached_sas_addr,SAS_ADDR_SIZE); |
| 1084 | |
| 1085 | return 1; |
| 1086 | } |
| 1087 | } |
| 1088 | return 0; |
| 1089 | } |
| 1090 | |
| 1091 | static int sas_check_level_subtractive_boundary(struct domain_device *dev) |
| 1092 | { |
| 1093 | struct expander_device *ex = &dev->ex_dev; |
| 1094 | struct domain_device *child; |
| 1095 | u8 sub_addr[8] = {0, }; |
| 1096 | |
| 1097 | list_for_each_entry(child, &ex->children, siblings) { |
| 1098 | if (child->dev_type != EDGE_DEV && |
| 1099 | child->dev_type != FANOUT_DEV) |
| 1100 | continue; |
| 1101 | if (sub_addr[0] == 0) { |
| 1102 | sas_find_sub_addr(child, sub_addr); |
| 1103 | continue; |
| 1104 | } else { |
| 1105 | u8 s2[8]; |
| 1106 | |
| 1107 | if (sas_find_sub_addr(child, s2) && |
| 1108 | (SAS_ADDR(sub_addr) != SAS_ADDR(s2))) { |
| 1109 | |
| 1110 | SAS_DPRINTK("ex %016llx->%016llx-?->%016llx " |
| 1111 | "diverges from subtractive " |
| 1112 | "boundary %016llx\n", |
| 1113 | SAS_ADDR(dev->sas_addr), |
| 1114 | SAS_ADDR(child->sas_addr), |
| 1115 | SAS_ADDR(s2), |
| 1116 | SAS_ADDR(sub_addr)); |
| 1117 | |
| 1118 | sas_ex_disable_port(child, s2); |
| 1119 | } |
| 1120 | } |
| 1121 | } |
| 1122 | return 0; |
| 1123 | } |
| 1124 | /** |
| 1125 | * sas_ex_discover_devices -- discover devices attached to this expander |
| 1126 | * dev: pointer to the expander domain device |
| 1127 | * single: if you want to do a single phy, else set to -1; |
| 1128 | * |
| 1129 | * Configure this expander for use with its devices and register the |
| 1130 | * devices of this expander. |
| 1131 | */ |
| 1132 | static int sas_ex_discover_devices(struct domain_device *dev, int single) |
| 1133 | { |
| 1134 | struct expander_device *ex = &dev->ex_dev; |
| 1135 | int i = 0, end = ex->num_phys; |
| 1136 | int res = 0; |
| 1137 | |
| 1138 | if (0 <= single && single < end) { |
| 1139 | i = single; |
| 1140 | end = i+1; |
| 1141 | } |
| 1142 | |
| 1143 | for ( ; i < end; i++) { |
| 1144 | struct ex_phy *ex_phy = &ex->ex_phy[i]; |
| 1145 | |
| 1146 | if (ex_phy->phy_state == PHY_VACANT || |
| 1147 | ex_phy->phy_state == PHY_NOT_PRESENT || |
| 1148 | ex_phy->phy_state == PHY_DEVICE_DISCOVERED) |
| 1149 | continue; |
| 1150 | |
| 1151 | switch (ex_phy->linkrate) { |
James Bottomley | 88edf74 | 2006-09-06 17:36:13 -0500 | [diff] [blame] | 1152 | case SAS_PHY_DISABLED: |
| 1153 | case SAS_PHY_RESET_PROBLEM: |
| 1154 | case SAS_SATA_PORT_SELECTOR: |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1155 | continue; |
| 1156 | default: |
| 1157 | res = sas_ex_discover_dev(dev, i); |
| 1158 | if (res) |
| 1159 | break; |
| 1160 | continue; |
| 1161 | } |
| 1162 | } |
| 1163 | |
| 1164 | if (!res) |
| 1165 | sas_check_level_subtractive_boundary(dev); |
| 1166 | |
| 1167 | return res; |
| 1168 | } |
| 1169 | |
| 1170 | static int sas_check_ex_subtractive_boundary(struct domain_device *dev) |
| 1171 | { |
| 1172 | struct expander_device *ex = &dev->ex_dev; |
| 1173 | int i; |
| 1174 | u8 *sub_sas_addr = NULL; |
| 1175 | |
| 1176 | if (dev->dev_type != EDGE_DEV) |
| 1177 | return 0; |
| 1178 | |
| 1179 | for (i = 0; i < ex->num_phys; i++) { |
| 1180 | struct ex_phy *phy = &ex->ex_phy[i]; |
| 1181 | |
| 1182 | if (phy->phy_state == PHY_VACANT || |
| 1183 | phy->phy_state == PHY_NOT_PRESENT) |
| 1184 | continue; |
| 1185 | |
| 1186 | if ((phy->attached_dev_type == FANOUT_DEV || |
| 1187 | phy->attached_dev_type == EDGE_DEV) && |
| 1188 | phy->routing_attr == SUBTRACTIVE_ROUTING) { |
| 1189 | |
| 1190 | if (!sub_sas_addr) |
| 1191 | sub_sas_addr = &phy->attached_sas_addr[0]; |
| 1192 | else if (SAS_ADDR(sub_sas_addr) != |
| 1193 | SAS_ADDR(phy->attached_sas_addr)) { |
| 1194 | |
| 1195 | SAS_DPRINTK("ex %016llx phy 0x%x " |
| 1196 | "diverges(%016llx) on subtractive " |
| 1197 | "boundary(%016llx). Disabled\n", |
| 1198 | SAS_ADDR(dev->sas_addr), i, |
| 1199 | SAS_ADDR(phy->attached_sas_addr), |
| 1200 | SAS_ADDR(sub_sas_addr)); |
| 1201 | sas_ex_disable_phy(dev, i); |
| 1202 | } |
| 1203 | } |
| 1204 | } |
| 1205 | return 0; |
| 1206 | } |
| 1207 | |
| 1208 | static void sas_print_parent_topology_bug(struct domain_device *child, |
| 1209 | struct ex_phy *parent_phy, |
| 1210 | struct ex_phy *child_phy) |
| 1211 | { |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1212 | static const char *ex_type[] = { |
| 1213 | [EDGE_DEV] = "edge", |
| 1214 | [FANOUT_DEV] = "fanout", |
| 1215 | }; |
| 1216 | struct domain_device *parent = child->parent; |
| 1217 | |
Dan Williams | d214d81 | 2012-01-16 11:56:50 -0800 | [diff] [blame] | 1218 | sas_printk("%s ex %016llx phy 0x%x <--> %s ex %016llx " |
| 1219 | "phy 0x%x has %c:%c routing link!\n", |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1220 | |
| 1221 | ex_type[parent->dev_type], |
| 1222 | SAS_ADDR(parent->sas_addr), |
| 1223 | parent_phy->phy_id, |
| 1224 | |
| 1225 | ex_type[child->dev_type], |
| 1226 | SAS_ADDR(child->sas_addr), |
| 1227 | child_phy->phy_id, |
| 1228 | |
Dan Williams | d214d81 | 2012-01-16 11:56:50 -0800 | [diff] [blame] | 1229 | sas_route_char(parent, parent_phy), |
| 1230 | sas_route_char(child, child_phy)); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1231 | } |
| 1232 | |
| 1233 | static int sas_check_eeds(struct domain_device *child, |
| 1234 | struct ex_phy *parent_phy, |
| 1235 | struct ex_phy *child_phy) |
| 1236 | { |
| 1237 | int res = 0; |
| 1238 | struct domain_device *parent = child->parent; |
| 1239 | |
| 1240 | if (SAS_ADDR(parent->port->disc.fanout_sas_addr) != 0) { |
| 1241 | res = -ENODEV; |
| 1242 | SAS_DPRINTK("edge ex %016llx phy S:0x%x <--> edge ex %016llx " |
| 1243 | "phy S:0x%x, while there is a fanout ex %016llx\n", |
| 1244 | SAS_ADDR(parent->sas_addr), |
| 1245 | parent_phy->phy_id, |
| 1246 | SAS_ADDR(child->sas_addr), |
| 1247 | child_phy->phy_id, |
| 1248 | SAS_ADDR(parent->port->disc.fanout_sas_addr)); |
| 1249 | } else if (SAS_ADDR(parent->port->disc.eeds_a) == 0) { |
| 1250 | memcpy(parent->port->disc.eeds_a, parent->sas_addr, |
| 1251 | SAS_ADDR_SIZE); |
| 1252 | memcpy(parent->port->disc.eeds_b, child->sas_addr, |
| 1253 | SAS_ADDR_SIZE); |
| 1254 | } else if (((SAS_ADDR(parent->port->disc.eeds_a) == |
| 1255 | SAS_ADDR(parent->sas_addr)) || |
| 1256 | (SAS_ADDR(parent->port->disc.eeds_a) == |
| 1257 | SAS_ADDR(child->sas_addr))) |
| 1258 | && |
| 1259 | ((SAS_ADDR(parent->port->disc.eeds_b) == |
| 1260 | SAS_ADDR(parent->sas_addr)) || |
| 1261 | (SAS_ADDR(parent->port->disc.eeds_b) == |
| 1262 | SAS_ADDR(child->sas_addr)))) |
| 1263 | ; |
| 1264 | else { |
| 1265 | res = -ENODEV; |
| 1266 | SAS_DPRINTK("edge ex %016llx phy 0x%x <--> edge ex %016llx " |
| 1267 | "phy 0x%x link forms a third EEDS!\n", |
| 1268 | SAS_ADDR(parent->sas_addr), |
| 1269 | parent_phy->phy_id, |
| 1270 | SAS_ADDR(child->sas_addr), |
| 1271 | child_phy->phy_id); |
| 1272 | } |
| 1273 | |
| 1274 | return res; |
| 1275 | } |
| 1276 | |
| 1277 | /* Here we spill over 80 columns. It is intentional. |
| 1278 | */ |
| 1279 | static int sas_check_parent_topology(struct domain_device *child) |
| 1280 | { |
| 1281 | struct expander_device *child_ex = &child->ex_dev; |
| 1282 | struct expander_device *parent_ex; |
| 1283 | int i; |
| 1284 | int res = 0; |
| 1285 | |
| 1286 | if (!child->parent) |
| 1287 | return 0; |
| 1288 | |
| 1289 | if (child->parent->dev_type != EDGE_DEV && |
| 1290 | child->parent->dev_type != FANOUT_DEV) |
| 1291 | return 0; |
| 1292 | |
| 1293 | parent_ex = &child->parent->ex_dev; |
| 1294 | |
| 1295 | for (i = 0; i < parent_ex->num_phys; i++) { |
| 1296 | struct ex_phy *parent_phy = &parent_ex->ex_phy[i]; |
| 1297 | struct ex_phy *child_phy; |
| 1298 | |
| 1299 | if (parent_phy->phy_state == PHY_VACANT || |
| 1300 | parent_phy->phy_state == PHY_NOT_PRESENT) |
| 1301 | continue; |
| 1302 | |
| 1303 | if (SAS_ADDR(parent_phy->attached_sas_addr) != SAS_ADDR(child->sas_addr)) |
| 1304 | continue; |
| 1305 | |
| 1306 | child_phy = &child_ex->ex_phy[parent_phy->attached_phy_id]; |
| 1307 | |
| 1308 | switch (child->parent->dev_type) { |
| 1309 | case EDGE_DEV: |
| 1310 | if (child->dev_type == FANOUT_DEV) { |
| 1311 | if (parent_phy->routing_attr != SUBTRACTIVE_ROUTING || |
| 1312 | child_phy->routing_attr != TABLE_ROUTING) { |
| 1313 | sas_print_parent_topology_bug(child, parent_phy, child_phy); |
| 1314 | res = -ENODEV; |
| 1315 | } |
| 1316 | } else if (parent_phy->routing_attr == SUBTRACTIVE_ROUTING) { |
| 1317 | if (child_phy->routing_attr == SUBTRACTIVE_ROUTING) { |
| 1318 | res = sas_check_eeds(child, parent_phy, child_phy); |
| 1319 | } else if (child_phy->routing_attr != TABLE_ROUTING) { |
| 1320 | sas_print_parent_topology_bug(child, parent_phy, child_phy); |
| 1321 | res = -ENODEV; |
| 1322 | } |
Luben Tuikov | ffaac8f | 2011-09-22 09:41:36 -0700 | [diff] [blame] | 1323 | } else if (parent_phy->routing_attr == TABLE_ROUTING) { |
| 1324 | if (child_phy->routing_attr == SUBTRACTIVE_ROUTING || |
| 1325 | (child_phy->routing_attr == TABLE_ROUTING && |
| 1326 | child_ex->t2t_supp && parent_ex->t2t_supp)) { |
| 1327 | /* All good */; |
| 1328 | } else { |
| 1329 | sas_print_parent_topology_bug(child, parent_phy, child_phy); |
| 1330 | res = -ENODEV; |
| 1331 | } |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1332 | } |
| 1333 | break; |
| 1334 | case FANOUT_DEV: |
| 1335 | if (parent_phy->routing_attr != TABLE_ROUTING || |
| 1336 | child_phy->routing_attr != SUBTRACTIVE_ROUTING) { |
| 1337 | sas_print_parent_topology_bug(child, parent_phy, child_phy); |
| 1338 | res = -ENODEV; |
| 1339 | } |
| 1340 | break; |
| 1341 | default: |
| 1342 | break; |
| 1343 | } |
| 1344 | } |
| 1345 | |
| 1346 | return res; |
| 1347 | } |
| 1348 | |
| 1349 | #define RRI_REQ_SIZE 16 |
| 1350 | #define RRI_RESP_SIZE 44 |
| 1351 | |
| 1352 | static int sas_configure_present(struct domain_device *dev, int phy_id, |
| 1353 | u8 *sas_addr, int *index, int *present) |
| 1354 | { |
| 1355 | int i, res = 0; |
| 1356 | struct expander_device *ex = &dev->ex_dev; |
| 1357 | struct ex_phy *phy = &ex->ex_phy[phy_id]; |
| 1358 | u8 *rri_req; |
| 1359 | u8 *rri_resp; |
| 1360 | |
| 1361 | *present = 0; |
| 1362 | *index = 0; |
| 1363 | |
| 1364 | rri_req = alloc_smp_req(RRI_REQ_SIZE); |
| 1365 | if (!rri_req) |
| 1366 | return -ENOMEM; |
| 1367 | |
| 1368 | rri_resp = alloc_smp_resp(RRI_RESP_SIZE); |
| 1369 | if (!rri_resp) { |
| 1370 | kfree(rri_req); |
| 1371 | return -ENOMEM; |
| 1372 | } |
| 1373 | |
| 1374 | rri_req[1] = SMP_REPORT_ROUTE_INFO; |
| 1375 | rri_req[9] = phy_id; |
| 1376 | |
| 1377 | for (i = 0; i < ex->max_route_indexes ; i++) { |
| 1378 | *(__be16 *)(rri_req+6) = cpu_to_be16(i); |
| 1379 | res = smp_execute_task(dev, rri_req, RRI_REQ_SIZE, rri_resp, |
| 1380 | RRI_RESP_SIZE); |
| 1381 | if (res) |
| 1382 | goto out; |
| 1383 | res = rri_resp[2]; |
| 1384 | if (res == SMP_RESP_NO_INDEX) { |
| 1385 | SAS_DPRINTK("overflow of indexes: dev %016llx " |
| 1386 | "phy 0x%x index 0x%x\n", |
| 1387 | SAS_ADDR(dev->sas_addr), phy_id, i); |
| 1388 | goto out; |
| 1389 | } else if (res != SMP_RESP_FUNC_ACC) { |
| 1390 | SAS_DPRINTK("%s: dev %016llx phy 0x%x index 0x%x " |
Harvey Harrison | cadbd4a | 2008-07-03 23:47:27 -0700 | [diff] [blame] | 1391 | "result 0x%x\n", __func__, |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1392 | SAS_ADDR(dev->sas_addr), phy_id, i, res); |
| 1393 | goto out; |
| 1394 | } |
| 1395 | if (SAS_ADDR(sas_addr) != 0) { |
| 1396 | if (SAS_ADDR(rri_resp+16) == SAS_ADDR(sas_addr)) { |
| 1397 | *index = i; |
| 1398 | if ((rri_resp[12] & 0x80) == 0x80) |
| 1399 | *present = 0; |
| 1400 | else |
| 1401 | *present = 1; |
| 1402 | goto out; |
| 1403 | } else if (SAS_ADDR(rri_resp+16) == 0) { |
| 1404 | *index = i; |
| 1405 | *present = 0; |
| 1406 | goto out; |
| 1407 | } |
| 1408 | } else if (SAS_ADDR(rri_resp+16) == 0 && |
| 1409 | phy->last_da_index < i) { |
| 1410 | phy->last_da_index = i; |
| 1411 | *index = i; |
| 1412 | *present = 0; |
| 1413 | goto out; |
| 1414 | } |
| 1415 | } |
| 1416 | res = -1; |
| 1417 | out: |
| 1418 | kfree(rri_req); |
| 1419 | kfree(rri_resp); |
| 1420 | return res; |
| 1421 | } |
| 1422 | |
| 1423 | #define CRI_REQ_SIZE 44 |
| 1424 | #define CRI_RESP_SIZE 8 |
| 1425 | |
| 1426 | static int sas_configure_set(struct domain_device *dev, int phy_id, |
| 1427 | u8 *sas_addr, int index, int include) |
| 1428 | { |
| 1429 | int res; |
| 1430 | u8 *cri_req; |
| 1431 | u8 *cri_resp; |
| 1432 | |
| 1433 | cri_req = alloc_smp_req(CRI_REQ_SIZE); |
| 1434 | if (!cri_req) |
| 1435 | return -ENOMEM; |
| 1436 | |
| 1437 | cri_resp = alloc_smp_resp(CRI_RESP_SIZE); |
| 1438 | if (!cri_resp) { |
| 1439 | kfree(cri_req); |
| 1440 | return -ENOMEM; |
| 1441 | } |
| 1442 | |
| 1443 | cri_req[1] = SMP_CONF_ROUTE_INFO; |
| 1444 | *(__be16 *)(cri_req+6) = cpu_to_be16(index); |
| 1445 | cri_req[9] = phy_id; |
| 1446 | if (SAS_ADDR(sas_addr) == 0 || !include) |
| 1447 | cri_req[12] |= 0x80; |
| 1448 | memcpy(cri_req+16, sas_addr, SAS_ADDR_SIZE); |
| 1449 | |
| 1450 | res = smp_execute_task(dev, cri_req, CRI_REQ_SIZE, cri_resp, |
| 1451 | CRI_RESP_SIZE); |
| 1452 | if (res) |
| 1453 | goto out; |
| 1454 | res = cri_resp[2]; |
| 1455 | if (res == SMP_RESP_NO_INDEX) { |
| 1456 | SAS_DPRINTK("overflow of indexes: dev %016llx phy 0x%x " |
| 1457 | "index 0x%x\n", |
| 1458 | SAS_ADDR(dev->sas_addr), phy_id, index); |
| 1459 | } |
| 1460 | out: |
| 1461 | kfree(cri_req); |
| 1462 | kfree(cri_resp); |
| 1463 | return res; |
| 1464 | } |
| 1465 | |
| 1466 | static int sas_configure_phy(struct domain_device *dev, int phy_id, |
| 1467 | u8 *sas_addr, int include) |
| 1468 | { |
| 1469 | int index; |
| 1470 | int present; |
| 1471 | int res; |
| 1472 | |
| 1473 | res = sas_configure_present(dev, phy_id, sas_addr, &index, &present); |
| 1474 | if (res) |
| 1475 | return res; |
| 1476 | if (include ^ present) |
| 1477 | return sas_configure_set(dev, phy_id, sas_addr, index,include); |
| 1478 | |
| 1479 | return res; |
| 1480 | } |
| 1481 | |
| 1482 | /** |
| 1483 | * sas_configure_parent -- configure routing table of parent |
| 1484 | * parent: parent expander |
| 1485 | * child: child expander |
| 1486 | * sas_addr: SAS port identifier of device directly attached to child |
| 1487 | */ |
| 1488 | static int sas_configure_parent(struct domain_device *parent, |
| 1489 | struct domain_device *child, |
| 1490 | u8 *sas_addr, int include) |
| 1491 | { |
| 1492 | struct expander_device *ex_parent = &parent->ex_dev; |
| 1493 | int res = 0; |
| 1494 | int i; |
| 1495 | |
| 1496 | if (parent->parent) { |
| 1497 | res = sas_configure_parent(parent->parent, parent, sas_addr, |
| 1498 | include); |
| 1499 | if (res) |
| 1500 | return res; |
| 1501 | } |
| 1502 | |
| 1503 | if (ex_parent->conf_route_table == 0) { |
| 1504 | SAS_DPRINTK("ex %016llx has self-configuring routing table\n", |
| 1505 | SAS_ADDR(parent->sas_addr)); |
| 1506 | return 0; |
| 1507 | } |
| 1508 | |
| 1509 | for (i = 0; i < ex_parent->num_phys; i++) { |
| 1510 | struct ex_phy *phy = &ex_parent->ex_phy[i]; |
| 1511 | |
| 1512 | if ((phy->routing_attr == TABLE_ROUTING) && |
| 1513 | (SAS_ADDR(phy->attached_sas_addr) == |
| 1514 | SAS_ADDR(child->sas_addr))) { |
| 1515 | res = sas_configure_phy(parent, i, sas_addr, include); |
| 1516 | if (res) |
| 1517 | return res; |
| 1518 | } |
| 1519 | } |
| 1520 | |
| 1521 | return res; |
| 1522 | } |
| 1523 | |
| 1524 | /** |
| 1525 | * sas_configure_routing -- configure routing |
| 1526 | * dev: expander device |
| 1527 | * sas_addr: port identifier of device directly attached to the expander device |
| 1528 | */ |
| 1529 | static int sas_configure_routing(struct domain_device *dev, u8 *sas_addr) |
| 1530 | { |
| 1531 | if (dev->parent) |
| 1532 | return sas_configure_parent(dev->parent, dev, sas_addr, 1); |
| 1533 | return 0; |
| 1534 | } |
| 1535 | |
| 1536 | static int sas_disable_routing(struct domain_device *dev, u8 *sas_addr) |
| 1537 | { |
| 1538 | if (dev->parent) |
| 1539 | return sas_configure_parent(dev->parent, dev, sas_addr, 0); |
| 1540 | return 0; |
| 1541 | } |
| 1542 | |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1543 | /** |
| 1544 | * sas_discover_expander -- expander discovery |
| 1545 | * @ex: pointer to expander domain device |
| 1546 | * |
| 1547 | * See comment in sas_discover_sata(). |
| 1548 | */ |
| 1549 | static int sas_discover_expander(struct domain_device *dev) |
| 1550 | { |
| 1551 | int res; |
| 1552 | |
| 1553 | res = sas_notify_lldd_dev_found(dev); |
| 1554 | if (res) |
| 1555 | return res; |
| 1556 | |
| 1557 | res = sas_ex_general(dev); |
| 1558 | if (res) |
| 1559 | goto out_err; |
| 1560 | res = sas_ex_manuf_info(dev); |
| 1561 | if (res) |
| 1562 | goto out_err; |
| 1563 | |
| 1564 | res = sas_expander_discover(dev); |
| 1565 | if (res) { |
| 1566 | SAS_DPRINTK("expander %016llx discovery failed(0x%x)\n", |
| 1567 | SAS_ADDR(dev->sas_addr), res); |
| 1568 | goto out_err; |
| 1569 | } |
| 1570 | |
| 1571 | sas_check_ex_subtractive_boundary(dev); |
| 1572 | res = sas_check_parent_topology(dev); |
| 1573 | if (res) |
| 1574 | goto out_err; |
| 1575 | return 0; |
| 1576 | out_err: |
| 1577 | sas_notify_lldd_dev_gone(dev); |
| 1578 | return res; |
| 1579 | } |
| 1580 | |
| 1581 | static int sas_ex_level_discovery(struct asd_sas_port *port, const int level) |
| 1582 | { |
| 1583 | int res = 0; |
| 1584 | struct domain_device *dev; |
| 1585 | |
| 1586 | list_for_each_entry(dev, &port->dev_list, dev_list_node) { |
| 1587 | if (dev->dev_type == EDGE_DEV || |
| 1588 | dev->dev_type == FANOUT_DEV) { |
| 1589 | struct sas_expander_device *ex = |
| 1590 | rphy_to_expander_device(dev->rphy); |
| 1591 | |
| 1592 | if (level == ex->level) |
| 1593 | res = sas_ex_discover_devices(dev, -1); |
| 1594 | else if (level > 0) |
| 1595 | res = sas_ex_discover_devices(port->port_dev, -1); |
| 1596 | |
| 1597 | } |
| 1598 | } |
| 1599 | |
| 1600 | return res; |
| 1601 | } |
| 1602 | |
| 1603 | static int sas_ex_bfs_disc(struct asd_sas_port *port) |
| 1604 | { |
| 1605 | int res; |
| 1606 | int level; |
| 1607 | |
| 1608 | do { |
| 1609 | level = port->disc.max_level; |
| 1610 | res = sas_ex_level_discovery(port, level); |
| 1611 | mb(); |
| 1612 | } while (level < port->disc.max_level); |
| 1613 | |
| 1614 | return res; |
| 1615 | } |
| 1616 | |
| 1617 | int sas_discover_root_expander(struct domain_device *dev) |
| 1618 | { |
| 1619 | int res; |
| 1620 | struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy); |
| 1621 | |
Darrick J. Wong | bf45120 | 2007-01-11 14:14:52 -0800 | [diff] [blame] | 1622 | res = sas_rphy_add(dev->rphy); |
| 1623 | if (res) |
| 1624 | goto out_err; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1625 | |
| 1626 | ex->level = dev->port->disc.max_level; /* 0 */ |
| 1627 | res = sas_discover_expander(dev); |
Darrick J. Wong | bf45120 | 2007-01-11 14:14:52 -0800 | [diff] [blame] | 1628 | if (res) |
| 1629 | goto out_err2; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1630 | |
Darrick J. Wong | bf45120 | 2007-01-11 14:14:52 -0800 | [diff] [blame] | 1631 | sas_ex_bfs_disc(dev->port); |
| 1632 | |
| 1633 | return res; |
| 1634 | |
| 1635 | out_err2: |
Darrick J. Wong | 6f63caa | 2007-01-26 14:08:43 -0800 | [diff] [blame] | 1636 | sas_rphy_remove(dev->rphy); |
Darrick J. Wong | bf45120 | 2007-01-11 14:14:52 -0800 | [diff] [blame] | 1637 | out_err: |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1638 | return res; |
| 1639 | } |
| 1640 | |
| 1641 | /* ---------- Domain revalidation ---------- */ |
| 1642 | |
| 1643 | static int sas_get_phy_discover(struct domain_device *dev, |
| 1644 | int phy_id, struct smp_resp *disc_resp) |
| 1645 | { |
| 1646 | int res; |
| 1647 | u8 *disc_req; |
| 1648 | |
| 1649 | disc_req = alloc_smp_req(DISCOVER_REQ_SIZE); |
| 1650 | if (!disc_req) |
| 1651 | return -ENOMEM; |
| 1652 | |
| 1653 | disc_req[1] = SMP_DISCOVER; |
| 1654 | disc_req[9] = phy_id; |
| 1655 | |
| 1656 | res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE, |
| 1657 | disc_resp, DISCOVER_RESP_SIZE); |
| 1658 | if (res) |
| 1659 | goto out; |
| 1660 | else if (disc_resp->result != SMP_RESP_FUNC_ACC) { |
| 1661 | res = disc_resp->result; |
| 1662 | goto out; |
| 1663 | } |
| 1664 | out: |
| 1665 | kfree(disc_req); |
| 1666 | return res; |
| 1667 | } |
| 1668 | |
| 1669 | static int sas_get_phy_change_count(struct domain_device *dev, |
| 1670 | int phy_id, int *pcc) |
| 1671 | { |
| 1672 | int res; |
| 1673 | struct smp_resp *disc_resp; |
| 1674 | |
| 1675 | disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE); |
| 1676 | if (!disc_resp) |
| 1677 | return -ENOMEM; |
| 1678 | |
| 1679 | res = sas_get_phy_discover(dev, phy_id, disc_resp); |
| 1680 | if (!res) |
| 1681 | *pcc = disc_resp->disc.change_count; |
| 1682 | |
| 1683 | kfree(disc_resp); |
| 1684 | return res; |
| 1685 | } |
| 1686 | |
Dan Williams | 354cf82 | 2012-01-12 17:57:35 -0800 | [diff] [blame] | 1687 | static int sas_get_phy_attached_dev(struct domain_device *dev, int phy_id, |
| 1688 | u8 *sas_addr, enum sas_dev_type *type) |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1689 | { |
| 1690 | int res; |
| 1691 | struct smp_resp *disc_resp; |
| 1692 | struct discover_resp *dr; |
| 1693 | |
| 1694 | disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE); |
| 1695 | if (!disc_resp) |
| 1696 | return -ENOMEM; |
| 1697 | dr = &disc_resp->disc; |
| 1698 | |
| 1699 | res = sas_get_phy_discover(dev, phy_id, disc_resp); |
Dan Williams | 354cf82 | 2012-01-12 17:57:35 -0800 | [diff] [blame] | 1700 | if (res == 0) { |
| 1701 | memcpy(sas_addr, disc_resp->disc.attached_sas_addr, 8); |
| 1702 | *type = to_dev_type(dr); |
| 1703 | if (*type == 0) |
| 1704 | memset(sas_addr, 0, 8); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1705 | } |
| 1706 | kfree(disc_resp); |
| 1707 | return res; |
| 1708 | } |
| 1709 | |
| 1710 | 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] | 1711 | int from_phy, bool update) |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1712 | { |
| 1713 | struct expander_device *ex = &dev->ex_dev; |
| 1714 | int res = 0; |
| 1715 | int i; |
| 1716 | |
| 1717 | for (i = from_phy; i < ex->num_phys; i++) { |
| 1718 | int phy_change_count = 0; |
| 1719 | |
| 1720 | res = sas_get_phy_change_count(dev, i, &phy_change_count); |
| 1721 | if (res) |
| 1722 | goto out; |
| 1723 | else if (phy_change_count != ex->ex_phy[i].phy_change_count) { |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1724 | if (update) |
| 1725 | ex->ex_phy[i].phy_change_count = |
| 1726 | phy_change_count; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1727 | *phy_id = i; |
| 1728 | return 0; |
| 1729 | } |
| 1730 | } |
| 1731 | out: |
| 1732 | return res; |
| 1733 | } |
| 1734 | |
| 1735 | static int sas_get_ex_change_count(struct domain_device *dev, int *ecc) |
| 1736 | { |
| 1737 | int res; |
| 1738 | u8 *rg_req; |
| 1739 | struct smp_resp *rg_resp; |
| 1740 | |
| 1741 | rg_req = alloc_smp_req(RG_REQ_SIZE); |
| 1742 | if (!rg_req) |
| 1743 | return -ENOMEM; |
| 1744 | |
| 1745 | rg_resp = alloc_smp_resp(RG_RESP_SIZE); |
| 1746 | if (!rg_resp) { |
| 1747 | kfree(rg_req); |
| 1748 | return -ENOMEM; |
| 1749 | } |
| 1750 | |
| 1751 | rg_req[1] = SMP_REPORT_GENERAL; |
| 1752 | |
| 1753 | res = smp_execute_task(dev, rg_req, RG_REQ_SIZE, rg_resp, |
| 1754 | RG_RESP_SIZE); |
| 1755 | if (res) |
| 1756 | goto out; |
| 1757 | if (rg_resp->result != SMP_RESP_FUNC_ACC) { |
| 1758 | res = rg_resp->result; |
| 1759 | goto out; |
| 1760 | } |
| 1761 | |
| 1762 | *ecc = be16_to_cpu(rg_resp->rg.change_count); |
| 1763 | out: |
| 1764 | kfree(rg_resp); |
| 1765 | kfree(rg_req); |
| 1766 | return res; |
| 1767 | } |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1768 | /** |
| 1769 | * sas_find_bcast_dev - find the device issue BROADCAST(CHANGE). |
| 1770 | * @dev:domain device to be detect. |
| 1771 | * @src_dev: the device which originated BROADCAST(CHANGE). |
| 1772 | * |
| 1773 | * Add self-configuration expander suport. Suppose two expander cascading, |
| 1774 | * when the first level expander is self-configuring, hotplug the disks in |
| 1775 | * second level expander, BROADCAST(CHANGE) will not only be originated |
| 1776 | * in the second level expander, but also be originated in the first level |
| 1777 | * expander (see SAS protocol SAS 2r-14, 7.11 for detail), it is to say, |
| 1778 | * expander changed count in two level expanders will all increment at least |
| 1779 | * once, but the phy which chang count has changed is the source device which |
| 1780 | * we concerned. |
| 1781 | */ |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1782 | |
| 1783 | static int sas_find_bcast_dev(struct domain_device *dev, |
| 1784 | struct domain_device **src_dev) |
| 1785 | { |
| 1786 | struct expander_device *ex = &dev->ex_dev; |
| 1787 | int ex_change_count = -1; |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1788 | int phy_id = -1; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1789 | int res; |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1790 | struct domain_device *ch; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1791 | |
| 1792 | res = sas_get_ex_change_count(dev, &ex_change_count); |
| 1793 | if (res) |
| 1794 | goto out; |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1795 | if (ex_change_count != -1 && ex_change_count != ex->ex_change_count) { |
| 1796 | /* Just detect if this expander phys phy change count changed, |
| 1797 | * in order to determine if this expander originate BROADCAST, |
| 1798 | * and do not update phy change count field in our structure. |
| 1799 | */ |
| 1800 | res = sas_find_bcast_phy(dev, &phy_id, 0, false); |
| 1801 | if (phy_id != -1) { |
| 1802 | *src_dev = dev; |
| 1803 | ex->ex_change_count = ex_change_count; |
| 1804 | SAS_DPRINTK("Expander phy change count has changed\n"); |
| 1805 | return res; |
| 1806 | } else |
| 1807 | SAS_DPRINTK("Expander phys DID NOT change\n"); |
| 1808 | } |
| 1809 | list_for_each_entry(ch, &ex->children, siblings) { |
| 1810 | if (ch->dev_type == EDGE_DEV || ch->dev_type == FANOUT_DEV) { |
| 1811 | res = sas_find_bcast_dev(ch, src_dev); |
Mark Salyzyn | 24926da | 2011-09-01 06:11:17 -0700 | [diff] [blame] | 1812 | if (*src_dev) |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1813 | return res; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1814 | } |
| 1815 | } |
| 1816 | out: |
| 1817 | return res; |
| 1818 | } |
| 1819 | |
Dan Williams | 1a34c06 | 2011-09-21 22:05:34 -0700 | [diff] [blame] | 1820 | static void sas_unregister_ex_tree(struct asd_sas_port *port, struct domain_device *dev) |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1821 | { |
| 1822 | struct expander_device *ex = &dev->ex_dev; |
| 1823 | struct domain_device *child, *n; |
| 1824 | |
| 1825 | list_for_each_entry_safe(child, n, &ex->children, siblings) { |
Dan Williams | e139942 | 2012-01-07 08:52:39 +0000 | [diff] [blame] | 1826 | set_bit(SAS_DEV_GONE, &child->state); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1827 | if (child->dev_type == EDGE_DEV || |
| 1828 | child->dev_type == FANOUT_DEV) |
Dan Williams | 1a34c06 | 2011-09-21 22:05:34 -0700 | [diff] [blame] | 1829 | sas_unregister_ex_tree(port, child); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1830 | else |
Dan Williams | 1a34c06 | 2011-09-21 22:05:34 -0700 | [diff] [blame] | 1831 | sas_unregister_dev(port, child); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1832 | } |
Dan Williams | 1a34c06 | 2011-09-21 22:05:34 -0700 | [diff] [blame] | 1833 | sas_unregister_dev(port, dev); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1834 | } |
| 1835 | |
| 1836 | static void sas_unregister_devs_sas_addr(struct domain_device *parent, |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1837 | int phy_id, bool last) |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1838 | { |
| 1839 | struct expander_device *ex_dev = &parent->ex_dev; |
| 1840 | struct ex_phy *phy = &ex_dev->ex_phy[phy_id]; |
Dan Williams | f41a0c4 | 2011-12-21 21:33:17 -0800 | [diff] [blame] | 1841 | struct domain_device *child, *n, *found = NULL; |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1842 | if (last) { |
| 1843 | list_for_each_entry_safe(child, n, |
| 1844 | &ex_dev->children, siblings) { |
| 1845 | if (SAS_ADDR(child->sas_addr) == |
| 1846 | SAS_ADDR(phy->attached_sas_addr)) { |
Dan Williams | e139942 | 2012-01-07 08:52:39 +0000 | [diff] [blame] | 1847 | set_bit(SAS_DEV_GONE, &child->state); |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1848 | if (child->dev_type == EDGE_DEV || |
| 1849 | child->dev_type == FANOUT_DEV) |
Dan Williams | 1a34c06 | 2011-09-21 22:05:34 -0700 | [diff] [blame] | 1850 | sas_unregister_ex_tree(parent->port, child); |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1851 | else |
Dan Williams | 1a34c06 | 2011-09-21 22:05:34 -0700 | [diff] [blame] | 1852 | sas_unregister_dev(parent->port, child); |
Dan Williams | f41a0c4 | 2011-12-21 21:33:17 -0800 | [diff] [blame] | 1853 | found = child; |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1854 | break; |
| 1855 | } |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1856 | } |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1857 | sas_disable_routing(parent, phy->attached_sas_addr); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1858 | } |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1859 | memset(phy->attached_sas_addr, 0, SAS_ADDR_SIZE); |
Mark Salyzyn | a73914c | 2011-09-22 08:32:23 -0700 | [diff] [blame] | 1860 | if (phy->port) { |
| 1861 | sas_port_delete_phy(phy->port, phy->phy); |
Dan Williams | f41a0c4 | 2011-12-21 21:33:17 -0800 | [diff] [blame] | 1862 | sas_device_set_phy(found, phy->port); |
Mark Salyzyn | a73914c | 2011-09-22 08:32:23 -0700 | [diff] [blame] | 1863 | if (phy->port->num_phys == 0) |
| 1864 | sas_port_delete(phy->port); |
| 1865 | phy->port = NULL; |
| 1866 | } |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1867 | } |
| 1868 | |
| 1869 | static int sas_discover_bfs_by_root_level(struct domain_device *root, |
| 1870 | const int level) |
| 1871 | { |
| 1872 | struct expander_device *ex_root = &root->ex_dev; |
| 1873 | struct domain_device *child; |
| 1874 | int res = 0; |
| 1875 | |
| 1876 | list_for_each_entry(child, &ex_root->children, siblings) { |
| 1877 | if (child->dev_type == EDGE_DEV || |
| 1878 | child->dev_type == FANOUT_DEV) { |
| 1879 | struct sas_expander_device *ex = |
| 1880 | rphy_to_expander_device(child->rphy); |
| 1881 | |
| 1882 | if (level > ex->level) |
| 1883 | res = sas_discover_bfs_by_root_level(child, |
| 1884 | level); |
| 1885 | else if (level == ex->level) |
| 1886 | res = sas_ex_discover_devices(child, -1); |
| 1887 | } |
| 1888 | } |
| 1889 | return res; |
| 1890 | } |
| 1891 | |
| 1892 | static int sas_discover_bfs_by_root(struct domain_device *dev) |
| 1893 | { |
| 1894 | int res; |
| 1895 | struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy); |
| 1896 | int level = ex->level+1; |
| 1897 | |
| 1898 | res = sas_ex_discover_devices(dev, -1); |
| 1899 | if (res) |
| 1900 | goto out; |
| 1901 | do { |
| 1902 | res = sas_discover_bfs_by_root_level(dev, level); |
| 1903 | mb(); |
| 1904 | level += 1; |
| 1905 | } while (level <= dev->port->disc.max_level); |
| 1906 | out: |
| 1907 | return res; |
| 1908 | } |
| 1909 | |
| 1910 | static int sas_discover_new(struct domain_device *dev, int phy_id) |
| 1911 | { |
| 1912 | struct ex_phy *ex_phy = &dev->ex_dev.ex_phy[phy_id]; |
| 1913 | struct domain_device *child; |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1914 | bool found = false; |
| 1915 | int res, i; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1916 | |
| 1917 | SAS_DPRINTK("ex %016llx phy%d new device attached\n", |
| 1918 | SAS_ADDR(dev->sas_addr), phy_id); |
| 1919 | res = sas_ex_phy_discover(dev, phy_id); |
| 1920 | if (res) |
| 1921 | goto out; |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1922 | /* to support the wide port inserted */ |
| 1923 | for (i = 0; i < dev->ex_dev.num_phys; i++) { |
| 1924 | struct ex_phy *ex_phy_temp = &dev->ex_dev.ex_phy[i]; |
| 1925 | if (i == phy_id) |
| 1926 | continue; |
| 1927 | if (SAS_ADDR(ex_phy_temp->attached_sas_addr) == |
| 1928 | SAS_ADDR(ex_phy->attached_sas_addr)) { |
| 1929 | found = true; |
| 1930 | break; |
| 1931 | } |
| 1932 | } |
| 1933 | if (found) { |
| 1934 | sas_ex_join_wide_port(dev, phy_id); |
| 1935 | return 0; |
| 1936 | } |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1937 | res = sas_ex_discover_devices(dev, phy_id); |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1938 | if (!res) |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1939 | goto out; |
| 1940 | list_for_each_entry(child, &dev->ex_dev.children, siblings) { |
| 1941 | if (SAS_ADDR(child->sas_addr) == |
| 1942 | SAS_ADDR(ex_phy->attached_sas_addr)) { |
| 1943 | if (child->dev_type == EDGE_DEV || |
| 1944 | child->dev_type == FANOUT_DEV) |
| 1945 | res = sas_discover_bfs_by_root(child); |
| 1946 | break; |
| 1947 | } |
| 1948 | } |
| 1949 | out: |
| 1950 | return res; |
| 1951 | } |
| 1952 | |
Dan Williams | 354cf82 | 2012-01-12 17:57:35 -0800 | [diff] [blame] | 1953 | static bool dev_type_flutter(enum sas_dev_type new, enum sas_dev_type old) |
| 1954 | { |
| 1955 | if (old == new) |
| 1956 | return true; |
| 1957 | |
| 1958 | /* treat device directed resets as flutter, if we went |
| 1959 | * SAS_END_DEV to SATA_PENDING the link needs recovery |
| 1960 | */ |
| 1961 | if ((old == SATA_PENDING && new == SAS_END_DEV) || |
| 1962 | (old == SAS_END_DEV && new == SATA_PENDING)) |
| 1963 | return true; |
| 1964 | |
| 1965 | return false; |
| 1966 | } |
| 1967 | |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1968 | 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] | 1969 | { |
| 1970 | struct expander_device *ex = &dev->ex_dev; |
| 1971 | struct ex_phy *phy = &ex->ex_phy[phy_id]; |
Dan Williams | 354cf82 | 2012-01-12 17:57:35 -0800 | [diff] [blame] | 1972 | enum sas_dev_type type = NO_DEVICE; |
| 1973 | u8 sas_addr[8]; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1974 | int res; |
| 1975 | |
Dan Williams | 354cf82 | 2012-01-12 17:57:35 -0800 | [diff] [blame] | 1976 | res = sas_get_phy_attached_dev(dev, phy_id, sas_addr, &type); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1977 | switch (res) { |
| 1978 | case SMP_RESP_NO_PHY: |
| 1979 | phy->phy_state = PHY_NOT_PRESENT; |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1980 | sas_unregister_devs_sas_addr(dev, phy_id, last); |
Dan Williams | 354cf82 | 2012-01-12 17:57:35 -0800 | [diff] [blame] | 1981 | return res; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1982 | case SMP_RESP_PHY_VACANT: |
| 1983 | phy->phy_state = PHY_VACANT; |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1984 | sas_unregister_devs_sas_addr(dev, phy_id, last); |
Dan Williams | 354cf82 | 2012-01-12 17:57:35 -0800 | [diff] [blame] | 1985 | return res; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1986 | case SMP_RESP_FUNC_ACC: |
| 1987 | break; |
| 1988 | } |
| 1989 | |
Dan Williams | 354cf82 | 2012-01-12 17:57:35 -0800 | [diff] [blame] | 1990 | if (SAS_ADDR(sas_addr) == 0) { |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1991 | phy->phy_state = PHY_EMPTY; |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 1992 | sas_unregister_devs_sas_addr(dev, phy_id, last); |
Dan Williams | 354cf82 | 2012-01-12 17:57:35 -0800 | [diff] [blame] | 1993 | return res; |
| 1994 | } else if (SAS_ADDR(sas_addr) == SAS_ADDR(phy->attached_sas_addr) && |
| 1995 | dev_type_flutter(type, phy->attached_dev_type)) { |
| 1996 | struct domain_device *ata_dev = sas_ex_to_ata(dev, phy_id); |
| 1997 | char *action = ""; |
| 1998 | |
James Bottomley | a01e70e | 2006-09-06 19:28:07 -0500 | [diff] [blame] | 1999 | sas_ex_phy_discover(dev, phy_id); |
Dan Williams | 354cf82 | 2012-01-12 17:57:35 -0800 | [diff] [blame] | 2000 | |
| 2001 | if (ata_dev && phy->attached_dev_type == SATA_PENDING) |
| 2002 | action = ", needs recovery"; |
| 2003 | SAS_DPRINTK("ex %016llx phy 0x%x broadcast flutter%s\n", |
| 2004 | SAS_ADDR(dev->sas_addr), phy_id, action); |
| 2005 | return res; |
| 2006 | } |
| 2007 | |
Dan Williams | c666aae | 2012-01-19 18:43:08 -0800 | [diff] [blame] | 2008 | /* delete the old link */ |
| 2009 | if (SAS_ADDR(phy->attached_sas_addr) && |
| 2010 | SAS_ADDR(sas_addr) != SAS_ADDR(phy->attached_sas_addr)) { |
| 2011 | SAS_DPRINTK("ex %016llx phy 0x%x replace %016llx\n", |
| 2012 | SAS_ADDR(dev->sas_addr), phy_id, |
| 2013 | SAS_ADDR(phy->attached_sas_addr)); |
| 2014 | sas_unregister_devs_sas_addr(dev, phy_id, last); |
| 2015 | } |
| 2016 | |
Dan Williams | 354cf82 | 2012-01-12 17:57:35 -0800 | [diff] [blame] | 2017 | return sas_discover_new(dev, phy_id); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 2018 | } |
| 2019 | |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 2020 | /** |
| 2021 | * sas_rediscover - revalidate the domain. |
| 2022 | * @dev:domain device to be detect. |
| 2023 | * @phy_id: the phy id will be detected. |
| 2024 | * |
| 2025 | * NOTE: this process _must_ quit (return) as soon as any connection |
| 2026 | * errors are encountered. Connection recovery is done elsewhere. |
| 2027 | * Discover process only interrogates devices in order to discover the |
| 2028 | * domain.For plugging out, we un-register the device only when it is |
| 2029 | * the last phy in the port, for other phys in this port, we just delete it |
| 2030 | * from the port.For inserting, we do discovery when it is the |
| 2031 | * first phy,for other phys in this port, we add it to the port to |
| 2032 | * forming the wide-port. |
| 2033 | */ |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 2034 | static int sas_rediscover(struct domain_device *dev, const int phy_id) |
| 2035 | { |
| 2036 | struct expander_device *ex = &dev->ex_dev; |
| 2037 | struct ex_phy *changed_phy = &ex->ex_phy[phy_id]; |
| 2038 | int res = 0; |
| 2039 | int i; |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 2040 | bool last = true; /* is this the last phy of the port */ |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 2041 | |
| 2042 | SAS_DPRINTK("ex %016llx phy%d originated BROADCAST(CHANGE)\n", |
| 2043 | SAS_ADDR(dev->sas_addr), phy_id); |
| 2044 | |
| 2045 | if (SAS_ADDR(changed_phy->attached_sas_addr) != 0) { |
| 2046 | for (i = 0; i < ex->num_phys; i++) { |
| 2047 | struct ex_phy *phy = &ex->ex_phy[i]; |
| 2048 | |
| 2049 | if (i == phy_id) |
| 2050 | continue; |
| 2051 | if (SAS_ADDR(phy->attached_sas_addr) == |
| 2052 | SAS_ADDR(changed_phy->attached_sas_addr)) { |
| 2053 | SAS_DPRINTK("phy%d part of wide port with " |
| 2054 | "phy%d\n", phy_id, i); |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 2055 | last = false; |
| 2056 | break; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 2057 | } |
| 2058 | } |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 2059 | res = sas_rediscover_dev(dev, phy_id, last); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 2060 | } else |
| 2061 | res = sas_discover_new(dev, phy_id); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 2062 | return res; |
| 2063 | } |
| 2064 | |
| 2065 | /** |
| 2066 | * sas_revalidate_domain -- revalidate the domain |
| 2067 | * @port: port to the domain of interest |
| 2068 | * |
| 2069 | * NOTE: this process _must_ quit (return) as soon as any connection |
| 2070 | * errors are encountered. Connection recovery is done elsewhere. |
| 2071 | * Discover process only interrogates devices in order to discover the |
| 2072 | * domain. |
| 2073 | */ |
| 2074 | int sas_ex_revalidate_domain(struct domain_device *port_dev) |
| 2075 | { |
| 2076 | int res; |
| 2077 | struct domain_device *dev = NULL; |
| 2078 | |
| 2079 | res = sas_find_bcast_dev(port_dev, &dev); |
| 2080 | if (res) |
| 2081 | goto out; |
| 2082 | if (dev) { |
| 2083 | struct expander_device *ex = &dev->ex_dev; |
| 2084 | int i = 0, phy_id; |
| 2085 | |
| 2086 | do { |
| 2087 | phy_id = -1; |
Tom Peng | 19252de | 2009-07-17 16:02:04 +0800 | [diff] [blame] | 2088 | res = sas_find_bcast_phy(dev, &phy_id, i, true); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 2089 | if (phy_id == -1) |
| 2090 | break; |
| 2091 | res = sas_rediscover(dev, phy_id); |
| 2092 | i = phy_id + 1; |
| 2093 | } while (i < ex->num_phys); |
| 2094 | } |
| 2095 | out: |
| 2096 | return res; |
| 2097 | } |
| 2098 | |
FUJITA Tomonori | ba1fc17 | 2007-07-09 12:52:08 +0900 | [diff] [blame] | 2099 | int sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy, |
| 2100 | struct request *req) |
| 2101 | { |
| 2102 | struct domain_device *dev; |
Darrick J. Wong | 2cd614c | 2007-07-24 09:33:49 -0700 | [diff] [blame] | 2103 | int ret, type; |
FUJITA Tomonori | ba1fc17 | 2007-07-09 12:52:08 +0900 | [diff] [blame] | 2104 | struct request *rsp = req->next_rq; |
| 2105 | |
| 2106 | if (!rsp) { |
| 2107 | printk("%s: space for a smp response is missing\n", |
Harvey Harrison | cadbd4a | 2008-07-03 23:47:27 -0700 | [diff] [blame] | 2108 | __func__); |
FUJITA Tomonori | ba1fc17 | 2007-07-09 12:52:08 +0900 | [diff] [blame] | 2109 | return -EINVAL; |
| 2110 | } |
| 2111 | |
Darrick J. Wong | 2cd614c | 2007-07-24 09:33:49 -0700 | [diff] [blame] | 2112 | /* no rphy means no smp target support (ie aic94xx host) */ |
James Bottomley | b98e66f | 2007-12-28 16:35:17 -0600 | [diff] [blame] | 2113 | if (!rphy) |
| 2114 | return sas_smp_host_handler(shost, req, rsp); |
| 2115 | |
Darrick J. Wong | 2cd614c | 2007-07-24 09:33:49 -0700 | [diff] [blame] | 2116 | type = rphy->identify.device_type; |
FUJITA Tomonori | ba1fc17 | 2007-07-09 12:52:08 +0900 | [diff] [blame] | 2117 | |
| 2118 | if (type != SAS_EDGE_EXPANDER_DEVICE && |
| 2119 | type != SAS_FANOUT_EXPANDER_DEVICE) { |
| 2120 | printk("%s: can we send a smp request to a device?\n", |
Harvey Harrison | cadbd4a | 2008-07-03 23:47:27 -0700 | [diff] [blame] | 2121 | __func__); |
FUJITA Tomonori | ba1fc17 | 2007-07-09 12:52:08 +0900 | [diff] [blame] | 2122 | return -EINVAL; |
| 2123 | } |
| 2124 | |
| 2125 | dev = sas_find_dev_by_rphy(rphy); |
| 2126 | if (!dev) { |
Harvey Harrison | cadbd4a | 2008-07-03 23:47:27 -0700 | [diff] [blame] | 2127 | printk("%s: fail to find a domain_device?\n", __func__); |
FUJITA Tomonori | ba1fc17 | 2007-07-09 12:52:08 +0900 | [diff] [blame] | 2128 | return -EINVAL; |
| 2129 | } |
| 2130 | |
| 2131 | /* do we need to support multiple segments? */ |
| 2132 | if (req->bio->bi_vcnt > 1 || rsp->bio->bi_vcnt > 1) { |
| 2133 | printk("%s: multiple segments req %u %u, rsp %u %u\n", |
Tejun Heo | b079041 | 2009-05-07 22:24:42 +0900 | [diff] [blame] | 2134 | __func__, req->bio->bi_vcnt, blk_rq_bytes(req), |
| 2135 | rsp->bio->bi_vcnt, blk_rq_bytes(rsp)); |
FUJITA Tomonori | ba1fc17 | 2007-07-09 12:52:08 +0900 | [diff] [blame] | 2136 | return -EINVAL; |
| 2137 | } |
| 2138 | |
Tejun Heo | b079041 | 2009-05-07 22:24:42 +0900 | [diff] [blame] | 2139 | ret = smp_execute_task(dev, bio_data(req->bio), blk_rq_bytes(req), |
| 2140 | bio_data(rsp->bio), blk_rq_bytes(rsp)); |
James Bottomley | 2d4b63e | 2007-12-29 11:49:53 -0600 | [diff] [blame] | 2141 | if (ret > 0) { |
| 2142 | /* positive number is the untransferred residual */ |
Tejun Heo | c3a4d78 | 2009-05-07 22:24:37 +0900 | [diff] [blame] | 2143 | rsp->resid_len = ret; |
Tejun Heo | 5f49f63 | 2009-05-19 18:33:05 +0900 | [diff] [blame] | 2144 | req->resid_len = 0; |
James Bottomley | 2d4b63e | 2007-12-29 11:49:53 -0600 | [diff] [blame] | 2145 | ret = 0; |
Tejun Heo | 5f49f63 | 2009-05-19 18:33:05 +0900 | [diff] [blame] | 2146 | } else if (ret == 0) { |
| 2147 | rsp->resid_len = 0; |
| 2148 | req->resid_len = 0; |
James Bottomley | 2d4b63e | 2007-12-29 11:49:53 -0600 | [diff] [blame] | 2149 | } |
FUJITA Tomonori | ba1fc17 | 2007-07-09 12:52:08 +0900 | [diff] [blame] | 2150 | |
| 2151 | return ret; |
| 2152 | } |