12908d778SJames Bottomley /* 22908d778SJames Bottomley * Serial Attached SCSI (SAS) Port class 32908d778SJames Bottomley * 42908d778SJames Bottomley * Copyright (C) 2005 Adaptec, Inc. All rights reserved. 52908d778SJames Bottomley * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com> 62908d778SJames Bottomley * 72908d778SJames Bottomley * This file is licensed under GPLv2. 82908d778SJames Bottomley * 92908d778SJames Bottomley * This program is free software; you can redistribute it and/or 102908d778SJames Bottomley * modify it under the terms of the GNU General Public License as 112908d778SJames Bottomley * published by the Free Software Foundation; either version 2 of the 122908d778SJames Bottomley * License, or (at your option) any later version. 132908d778SJames Bottomley * 142908d778SJames Bottomley * This program is distributed in the hope that it will be useful, but 152908d778SJames Bottomley * WITHOUT ANY WARRANTY; without even the implied warranty of 162908d778SJames Bottomley * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 172908d778SJames Bottomley * General Public License for more details. 182908d778SJames Bottomley * 192908d778SJames Bottomley * You should have received a copy of the GNU General Public License 202908d778SJames Bottomley * along with this program; if not, write to the Free Software 212908d778SJames Bottomley * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 222908d778SJames Bottomley * 232908d778SJames Bottomley */ 242908d778SJames Bottomley 252908d778SJames Bottomley #include "sas_internal.h" 262908d778SJames Bottomley 272908d778SJames Bottomley #include <scsi/scsi_transport.h> 282908d778SJames Bottomley #include <scsi/scsi_transport_sas.h> 292908d778SJames Bottomley #include "../scsi_sas_internal.h" 302908d778SJames Bottomley 312908d778SJames Bottomley /** 322908d778SJames Bottomley * sas_form_port -- add this phy to a port 332908d778SJames Bottomley * @phy: the phy of interest 342908d778SJames Bottomley * 352908d778SJames Bottomley * This function adds this phy to an existing port, thus creating a wide 362908d778SJames Bottomley * port, or it creates a port and adds the phy to the port. 372908d778SJames Bottomley */ 382908d778SJames Bottomley static void sas_form_port(struct asd_sas_phy *phy) 392908d778SJames Bottomley { 402908d778SJames Bottomley int i; 412908d778SJames Bottomley struct sas_ha_struct *sas_ha = phy->ha; 422908d778SJames Bottomley struct asd_sas_port *port = phy->port; 432908d778SJames Bottomley struct sas_internal *si = 442908d778SJames Bottomley to_sas_internal(sas_ha->core.shost->transportt); 45980fa2f9SDarrick J. Wong unsigned long flags; 462908d778SJames Bottomley 472908d778SJames Bottomley if (port) { 482908d778SJames Bottomley if (memcmp(port->attached_sas_addr, phy->attached_sas_addr, 493b6e9fafSDarrick J. Wong SAS_ADDR_SIZE) != 0) 502908d778SJames Bottomley sas_deform_port(phy); 512908d778SJames Bottomley else { 522908d778SJames Bottomley SAS_DPRINTK("%s: phy%d belongs to port%d already(%d)!\n", 53cadbd4a5SHarvey Harrison __func__, phy->id, phy->port->id, 542908d778SJames Bottomley phy->port->num_phys); 552908d778SJames Bottomley return; 562908d778SJames Bottomley } 572908d778SJames Bottomley } 582908d778SJames Bottomley 592908d778SJames Bottomley /* find a port */ 60980fa2f9SDarrick J. Wong spin_lock_irqsave(&sas_ha->phy_port_lock, flags); 612908d778SJames Bottomley for (i = 0; i < sas_ha->num_phys; i++) { 622908d778SJames Bottomley port = sas_ha->sas_port[i]; 632908d778SJames Bottomley spin_lock(&port->phy_list_lock); 642908d778SJames Bottomley if (*(u64 *) port->sas_addr && 652908d778SJames Bottomley memcmp(port->attached_sas_addr, 662908d778SJames Bottomley phy->attached_sas_addr, SAS_ADDR_SIZE) == 0 && 672908d778SJames Bottomley port->num_phys > 0) { 682908d778SJames Bottomley /* wide port */ 692908d778SJames Bottomley SAS_DPRINTK("phy%d matched wide port%d\n", phy->id, 702908d778SJames Bottomley port->id); 712908d778SJames Bottomley break; 722908d778SJames Bottomley } else if (*(u64 *) port->sas_addr == 0 && port->num_phys==0) { 732908d778SJames Bottomley memcpy(port->sas_addr, phy->sas_addr, SAS_ADDR_SIZE); 742908d778SJames Bottomley break; 752908d778SJames Bottomley } 762908d778SJames Bottomley spin_unlock(&port->phy_list_lock); 772908d778SJames Bottomley } 782908d778SJames Bottomley 792908d778SJames Bottomley if (i >= sas_ha->num_phys) { 802908d778SJames Bottomley printk(KERN_NOTICE "%s: couldn't find a free port, bug?\n", 81cadbd4a5SHarvey Harrison __func__); 82980fa2f9SDarrick J. Wong spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags); 832908d778SJames Bottomley return; 842908d778SJames Bottomley } 852908d778SJames Bottomley 862908d778SJames Bottomley /* add the phy to the port */ 872908d778SJames Bottomley list_add_tail(&phy->port_phy_el, &port->phy_list); 882908d778SJames Bottomley phy->port = port; 892908d778SJames Bottomley port->num_phys++; 902908d778SJames Bottomley port->phy_mask |= (1U << phy->id); 912908d778SJames Bottomley 922908d778SJames Bottomley if (!port->phy) 932908d778SJames Bottomley port->phy = phy->phy; 942908d778SJames Bottomley 952908d778SJames Bottomley if (*(u64 *)port->attached_sas_addr == 0) { 962908d778SJames Bottomley port->class = phy->class; 972908d778SJames Bottomley memcpy(port->attached_sas_addr, phy->attached_sas_addr, 982908d778SJames Bottomley SAS_ADDR_SIZE); 992908d778SJames Bottomley port->iproto = phy->iproto; 1002908d778SJames Bottomley port->tproto = phy->tproto; 1012908d778SJames Bottomley port->oob_mode = phy->oob_mode; 1022908d778SJames Bottomley port->linkrate = phy->linkrate; 1032908d778SJames Bottomley } else 1042908d778SJames Bottomley port->linkrate = max(port->linkrate, phy->linkrate); 1052908d778SJames Bottomley spin_unlock(&port->phy_list_lock); 106980fa2f9SDarrick J. Wong spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags); 1072908d778SJames Bottomley 1082908d778SJames Bottomley if (!port->port) { 1092908d778SJames Bottomley port->port = sas_port_alloc(phy->phy->dev.parent, port->id); 1102908d778SJames Bottomley BUG_ON(!port->port); 1112908d778SJames Bottomley sas_port_add(port->port); 1122908d778SJames Bottomley } 1132908d778SJames Bottomley sas_port_add_phy(port->port, phy->phy); 1142908d778SJames Bottomley 115a29c0515SJames Bottomley SAS_DPRINTK("%s added to %s, phy_mask:0x%x (%16llx)\n", 11671610f55SKay Sievers dev_name(&phy->phy->dev), dev_name(&port->port->dev), 117a29c0515SJames Bottomley port->phy_mask, 118a29c0515SJames Bottomley SAS_ADDR(port->attached_sas_addr)); 119a29c0515SJames Bottomley 1202908d778SJames Bottomley if (port->port_dev) 1212908d778SJames Bottomley port->port_dev->pathways = port->num_phys; 1222908d778SJames Bottomley 1232908d778SJames Bottomley /* Tell the LLDD about this port formation. */ 1242908d778SJames Bottomley if (si->dft->lldd_port_formed) 1252908d778SJames Bottomley si->dft->lldd_port_formed(phy); 1262908d778SJames Bottomley 1272908d778SJames Bottomley sas_discover_event(phy->port, DISCE_DISCOVER_DOMAIN); 1282908d778SJames Bottomley } 1292908d778SJames Bottomley 1302908d778SJames Bottomley /** 1312908d778SJames Bottomley * sas_deform_port -- remove this phy from the port it belongs to 1322908d778SJames Bottomley * @phy: the phy of interest 1332908d778SJames Bottomley * 1342908d778SJames Bottomley * This is called when the physical link to the other phy has been 1352908d778SJames Bottomley * lost (on this phy), in Event thread context. We cannot delay here. 1362908d778SJames Bottomley */ 1372908d778SJames Bottomley void sas_deform_port(struct asd_sas_phy *phy) 1382908d778SJames Bottomley { 1392908d778SJames Bottomley struct sas_ha_struct *sas_ha = phy->ha; 1402908d778SJames Bottomley struct asd_sas_port *port = phy->port; 1412908d778SJames Bottomley struct sas_internal *si = 1422908d778SJames Bottomley to_sas_internal(sas_ha->core.shost->transportt); 143980fa2f9SDarrick J. Wong unsigned long flags; 1442908d778SJames Bottomley 1452908d778SJames Bottomley if (!port) 1462908d778SJames Bottomley return; /* done by a phy event */ 1472908d778SJames Bottomley 1482908d778SJames Bottomley if (port->port_dev) 1492908d778SJames Bottomley port->port_dev->pathways--; 1502908d778SJames Bottomley 1512908d778SJames Bottomley if (port->num_phys == 1) { 1522908d778SJames Bottomley sas_unregister_domain_devices(port); 1532908d778SJames Bottomley sas_port_delete(port->port); 1542908d778SJames Bottomley port->port = NULL; 1552908d778SJames Bottomley } else 1562908d778SJames Bottomley sas_port_delete_phy(port->port, phy->phy); 1572908d778SJames Bottomley 1582908d778SJames Bottomley 1592908d778SJames Bottomley if (si->dft->lldd_port_deformed) 1602908d778SJames Bottomley si->dft->lldd_port_deformed(phy); 1612908d778SJames Bottomley 162980fa2f9SDarrick J. Wong spin_lock_irqsave(&sas_ha->phy_port_lock, flags); 1632908d778SJames Bottomley spin_lock(&port->phy_list_lock); 1642908d778SJames Bottomley 1652908d778SJames Bottomley list_del_init(&phy->port_phy_el); 1662908d778SJames Bottomley phy->port = NULL; 1672908d778SJames Bottomley port->num_phys--; 1682908d778SJames Bottomley port->phy_mask &= ~(1U << phy->id); 1692908d778SJames Bottomley 1702908d778SJames Bottomley if (port->num_phys == 0) { 1712908d778SJames Bottomley INIT_LIST_HEAD(&port->phy_list); 1722908d778SJames Bottomley memset(port->sas_addr, 0, SAS_ADDR_SIZE); 1732908d778SJames Bottomley memset(port->attached_sas_addr, 0, SAS_ADDR_SIZE); 1742908d778SJames Bottomley port->class = 0; 1752908d778SJames Bottomley port->iproto = 0; 1762908d778SJames Bottomley port->tproto = 0; 1772908d778SJames Bottomley port->oob_mode = 0; 1782908d778SJames Bottomley port->phy_mask = 0; 1792908d778SJames Bottomley } 1802908d778SJames Bottomley spin_unlock(&port->phy_list_lock); 181980fa2f9SDarrick J. Wong spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags); 1822908d778SJames Bottomley 1832908d778SJames Bottomley return; 1842908d778SJames Bottomley } 1852908d778SJames Bottomley 1862908d778SJames Bottomley /* ---------- SAS port events ---------- */ 1872908d778SJames Bottomley 188c4028958SDavid Howells void sas_porte_bytes_dmaed(struct work_struct *work) 1892908d778SJames Bottomley { 190c4028958SDavid Howells struct asd_sas_event *ev = 191c4028958SDavid Howells container_of(work, struct asd_sas_event, work); 192c4028958SDavid Howells struct asd_sas_phy *phy = ev->phy; 1932908d778SJames Bottomley 1942908d778SJames Bottomley sas_begin_event(PORTE_BYTES_DMAED, &phy->ha->event_lock, 1952908d778SJames Bottomley &phy->port_events_pending); 1962908d778SJames Bottomley 1972908d778SJames Bottomley sas_form_port(phy); 1982908d778SJames Bottomley } 1992908d778SJames Bottomley 200c4028958SDavid Howells void sas_porte_broadcast_rcvd(struct work_struct *work) 2012908d778SJames Bottomley { 202c4028958SDavid Howells struct asd_sas_event *ev = 203c4028958SDavid Howells container_of(work, struct asd_sas_event, work); 204c4028958SDavid Howells struct asd_sas_phy *phy = ev->phy; 2052908d778SJames Bottomley unsigned long flags; 2062908d778SJames Bottomley u32 prim; 2072908d778SJames Bottomley 2082908d778SJames Bottomley sas_begin_event(PORTE_BROADCAST_RCVD, &phy->ha->event_lock, 2092908d778SJames Bottomley &phy->port_events_pending); 2102908d778SJames Bottomley 2112908d778SJames Bottomley spin_lock_irqsave(&phy->sas_prim_lock, flags); 2122908d778SJames Bottomley prim = phy->sas_prim; 2132908d778SJames Bottomley spin_unlock_irqrestore(&phy->sas_prim_lock, flags); 2142908d778SJames Bottomley 2152908d778SJames Bottomley SAS_DPRINTK("broadcast received: %d\n", prim); 2162908d778SJames Bottomley sas_discover_event(phy->port, DISCE_REVALIDATE_DOMAIN); 2172908d778SJames Bottomley } 2182908d778SJames Bottomley 219c4028958SDavid Howells void sas_porte_link_reset_err(struct work_struct *work) 2202908d778SJames Bottomley { 221c4028958SDavid Howells struct asd_sas_event *ev = 222c4028958SDavid Howells container_of(work, struct asd_sas_event, work); 223c4028958SDavid Howells struct asd_sas_phy *phy = ev->phy; 2242908d778SJames Bottomley 2252908d778SJames Bottomley sas_begin_event(PORTE_LINK_RESET_ERR, &phy->ha->event_lock, 2262908d778SJames Bottomley &phy->port_events_pending); 2272908d778SJames Bottomley 2282908d778SJames Bottomley sas_deform_port(phy); 2292908d778SJames Bottomley } 2302908d778SJames Bottomley 231c4028958SDavid Howells void sas_porte_timer_event(struct work_struct *work) 2322908d778SJames Bottomley { 233c4028958SDavid Howells struct asd_sas_event *ev = 234c4028958SDavid Howells container_of(work, struct asd_sas_event, work); 235c4028958SDavid Howells struct asd_sas_phy *phy = ev->phy; 2362908d778SJames Bottomley 2372908d778SJames Bottomley sas_begin_event(PORTE_TIMER_EVENT, &phy->ha->event_lock, 2382908d778SJames Bottomley &phy->port_events_pending); 2392908d778SJames Bottomley 2402908d778SJames Bottomley sas_deform_port(phy); 2412908d778SJames Bottomley } 2422908d778SJames Bottomley 243c4028958SDavid Howells void sas_porte_hard_reset(struct work_struct *work) 2442908d778SJames Bottomley { 245c4028958SDavid Howells struct asd_sas_event *ev = 246c4028958SDavid Howells container_of(work, struct asd_sas_event, work); 247c4028958SDavid Howells struct asd_sas_phy *phy = ev->phy; 2482908d778SJames Bottomley 2492908d778SJames Bottomley sas_begin_event(PORTE_HARD_RESET, &phy->ha->event_lock, 2502908d778SJames Bottomley &phy->port_events_pending); 2512908d778SJames Bottomley 2522908d778SJames Bottomley sas_deform_port(phy); 2532908d778SJames Bottomley } 2542908d778SJames Bottomley 2552908d778SJames Bottomley /* ---------- SAS port registration ---------- */ 2562908d778SJames Bottomley 2572908d778SJames Bottomley static void sas_init_port(struct asd_sas_port *port, 2582908d778SJames Bottomley struct sas_ha_struct *sas_ha, int i) 2592908d778SJames Bottomley { 260a29c0515SJames Bottomley memset(port, 0, sizeof(*port)); 2612908d778SJames Bottomley port->id = i; 2622908d778SJames Bottomley INIT_LIST_HEAD(&port->dev_list); 2632908d778SJames Bottomley spin_lock_init(&port->phy_list_lock); 2642908d778SJames Bottomley INIT_LIST_HEAD(&port->phy_list); 2652908d778SJames Bottomley port->ha = sas_ha; 2662908d778SJames Bottomley 2672908d778SJames Bottomley spin_lock_init(&port->dev_list_lock); 2682908d778SJames Bottomley } 2692908d778SJames Bottomley 2702908d778SJames Bottomley int sas_register_ports(struct sas_ha_struct *sas_ha) 2712908d778SJames Bottomley { 2722908d778SJames Bottomley int i; 2732908d778SJames Bottomley 2742908d778SJames Bottomley /* initialize the ports and discovery */ 2752908d778SJames Bottomley for (i = 0; i < sas_ha->num_phys; i++) { 2762908d778SJames Bottomley struct asd_sas_port *port = sas_ha->sas_port[i]; 2772908d778SJames Bottomley 2782908d778SJames Bottomley sas_init_port(port, sas_ha, i); 2792908d778SJames Bottomley sas_init_disc(&port->disc, port); 2802908d778SJames Bottomley } 2812908d778SJames Bottomley return 0; 2822908d778SJames Bottomley } 2832908d778SJames Bottomley 2842908d778SJames Bottomley void sas_unregister_ports(struct sas_ha_struct *sas_ha) 2852908d778SJames Bottomley { 2862908d778SJames Bottomley int i; 2872908d778SJames Bottomley 2882908d778SJames Bottomley for (i = 0; i < sas_ha->num_phys; i++) 2892908d778SJames Bottomley if (sas_ha->sas_phy[i]->port) 2902908d778SJames Bottomley sas_deform_port(sas_ha->sas_phy[i]); 2912908d778SJames Bottomley 2922908d778SJames Bottomley } 293