/* * Serial Attached SCSI (SAS) Port class * * Copyright (C) 2005 Adaptec, Inc. All rights reserved. * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com> * * This file is licensed under GPLv2. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of the * License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA * */ #include "sas_internal.h" #include <scsi/scsi_transport.h> #include <scsi/scsi_transport_sas.h> #include "../scsi_sas_internal.h" static bool phy_is_wideport_member(struct asd_sas_port *port, struct asd_sas_phy *phy) { struct sas_ha_struct *sas_ha = phy->ha; if (memcmp(port->attached_sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE) != 0 || (sas_ha->strict_wide_ports && memcmp(port->sas_addr, phy->sas_addr, SAS_ADDR_SIZE) != 0)) return false; return true; } static void sas_resume_port(struct asd_sas_phy *phy) { struct domain_device *dev; struct asd_sas_port *port = phy->port; struct sas_ha_struct *sas_ha = phy->ha; struct sas_internal *si = to_sas_internal(sas_ha->core.shost->transportt); if (si->dft->lldd_port_formed) si->dft->lldd_port_formed(phy); if (port->suspended) port->suspended = 0; else { /* we only need to handle "link returned" actions once */ return; } /* if the port came back: * 1/ presume every device came back * 2/ force the next revalidation to check all expander phys */ list_for_each_entry(dev, &port->dev_list, dev_list_node) { int i, rc; rc = sas_notify_lldd_dev_found(dev); if (rc) { sas_unregister_dev(port, dev); continue; } if (dev->dev_type == EDGE_DEV || dev->dev_type == FANOUT_DEV) { dev->ex_dev.ex_change_count = -1; for (i = 0; i < dev->ex_dev.num_phys; i++) { struct ex_phy *phy = &dev->ex_dev.ex_phy[i]; phy->phy_change_count = -1; } } } sas_discover_event(port, DISCE_RESUME); } /** * sas_form_port -- add this phy to a port * @phy: the phy of interest * * This function adds this phy to an existing port, thus creating a wide * port, or it creates a port and adds the phy to the port. */ static void sas_form_port(struct asd_sas_phy *phy) { int i; struct sas_ha_struct *sas_ha = phy->ha; struct asd_sas_port *port = phy->port; struct sas_internal *si = to_sas_internal(sas_ha->core.shost->transportt); unsigned long flags; if (port) { if (!phy_is_wideport_member(port, phy)) sas_deform_port(phy, 0); else if (phy->suspended) { phy->suspended = 0; sas_resume_port(phy); /* phy came back, try to cancel the timeout */ wake_up(&sas_ha->eh_wait_q); return; } else { SAS_DPRINTK("%s: phy%d belongs to port%d already(%d)!\n", __func__, phy->id, phy->port->id, phy->port->num_phys); return; } } /* see if the phy should be part of a wide port */ spin_lock_irqsave(&sas_ha->phy_port_lock, flags); for (i = 0; i < sas_ha->num_phys; i++) { port = sas_ha->sas_port[i]; spin_lock(&port->phy_list_lock); if (*(u64 *) port->sas_addr && phy_is_wideport_member(port, phy) && port->num_phys > 0) { /* wide port */ SAS_DPRINTK("phy%d matched wide port%d\n", phy->id, port->id); break; } spin_unlock(&port->phy_list_lock); } /* The phy does not match any existing port, create a new one */ if (i == sas_ha->num_phys) { for (i = 0; i < sas_ha->num_phys; i++) { port = sas_ha->sas_port[i]; spin_lock(&port->phy_list_lock); if (*(u64 *)port->sas_addr == 0 && port->num_phys == 0) { memcpy(port->sas_addr, phy->sas_addr, SAS_ADDR_SIZE); break; } spin_unlock(&port->phy_list_lock); } } if (i >= sas_ha->num_phys) { printk(KERN_NOTICE "%s: couldn't find a free port, bug?\n", __func__); spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags); return; } /* add the phy to the port */ list_add_tail(&phy->port_phy_el, &port->phy_list); sas_phy_set_target(phy, port->port_dev); phy->port = port; port->num_phys++; port->phy_mask |= (1U << phy->id); if (*(u64 *)port->attached_sas_addr == 0) { port->class = phy->class; memcpy(port->attached_sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE); port->iproto = phy->iproto; port->tproto = phy->tproto; port->oob_mode = phy->oob_mode; port->linkrate = phy->linkrate; } else port->linkrate = max(port->linkrate, phy->linkrate); spin_unlock(&port->phy_list_lock); spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags); if (!port->port) { port->port = sas_port_alloc(phy->phy->dev.parent, port->id); BUG_ON(!port->port); sas_port_add(port->port); } sas_port_add_phy(port->port, phy->phy); SAS_DPRINTK("%s added to %s, phy_mask:0x%x (%16llx)\n", dev_name(&phy->phy->dev), dev_name(&port->port->dev), port->phy_mask, SAS_ADDR(port->attached_sas_addr)); if (port->port_dev) port->port_dev->pathways = port->num_phys; /* Tell the LLDD about this port formation. */ if (si->dft->lldd_port_formed) si->dft->lldd_port_formed(phy); sas_discover_event(phy->port, DISCE_DISCOVER_DOMAIN); } /** * sas_deform_port -- remove this phy from the port it belongs to * @phy: the phy of interest * * This is called when the physical link to the other phy has been * lost (on this phy), in Event thread context. We cannot delay here. */ void sas_deform_port(struct asd_sas_phy *phy, int gone) { struct sas_ha_struct *sas_ha = phy->ha; struct asd_sas_port *port = phy->port; struct sas_internal *si = to_sas_internal(sas_ha->core.shost->transportt); struct domain_device *dev; unsigned long flags; if (!port) return; /* done by a phy event */ dev = port->port_dev; if (dev) dev->pathways--; if (port->num_phys == 1) { sas_unregister_domain_devices(port, gone); sas_port_delete(port->port); port->port = NULL; } else { sas_port_delete_phy(port->port, phy->phy); sas_device_set_phy(dev, port->port); } if (si->dft->lldd_port_deformed) si->dft->lldd_port_deformed(phy); spin_lock_irqsave(&sas_ha->phy_port_lock, flags); spin_lock(&port->phy_list_lock); list_del_init(&phy->port_phy_el); sas_phy_set_target(phy, NULL); phy->port = NULL; port->num_phys--; port->phy_mask &= ~(1U << phy->id); if (port->num_phys == 0) { INIT_LIST_HEAD(&port->phy_list); memset(port->sas_addr, 0, SAS_ADDR_SIZE); memset(port->attached_sas_addr, 0, SAS_ADDR_SIZE); port->class = 0; port->iproto = 0; port->tproto = 0; port->oob_mode = 0; port->phy_mask = 0; } spin_unlock(&port->phy_list_lock); spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags); return; } /* ---------- SAS port events ---------- */ void sas_porte_bytes_dmaed(struct work_struct *work) { struct asd_sas_event *ev = to_asd_sas_event(work); struct asd_sas_phy *phy = ev->phy; clear_bit(PORTE_BYTES_DMAED, &phy->port_events_pending); sas_form_port(phy); } void sas_porte_broadcast_rcvd(struct work_struct *work) { struct asd_sas_event *ev = to_asd_sas_event(work); struct asd_sas_phy *phy = ev->phy; unsigned long flags; u32 prim; clear_bit(PORTE_BROADCAST_RCVD, &phy->port_events_pending); spin_lock_irqsave(&phy->sas_prim_lock, flags); prim = phy->sas_prim; spin_unlock_irqrestore(&phy->sas_prim_lock, flags); SAS_DPRINTK("broadcast received: %d\n", prim); sas_discover_event(phy->port, DISCE_REVALIDATE_DOMAIN); } void sas_porte_link_reset_err(struct work_struct *work) { struct asd_sas_event *ev = to_asd_sas_event(work); struct asd_sas_phy *phy = ev->phy; clear_bit(PORTE_LINK_RESET_ERR, &phy->port_events_pending); sas_deform_port(phy, 1); } void sas_porte_timer_event(struct work_struct *work) { struct asd_sas_event *ev = to_asd_sas_event(work); struct asd_sas_phy *phy = ev->phy; clear_bit(PORTE_TIMER_EVENT, &phy->port_events_pending); sas_deform_port(phy, 1); } void sas_porte_hard_reset(struct work_struct *work) { struct asd_sas_event *ev = to_asd_sas_event(work); struct asd_sas_phy *phy = ev->phy; clear_bit(PORTE_HARD_RESET, &phy->port_events_pending); sas_deform_port(phy, 1); } /* ---------- SAS port registration ---------- */ static void sas_init_port(struct asd_sas_port *port, struct sas_ha_struct *sas_ha, int i) { memset(port, 0, sizeof(*port)); port->id = i; INIT_LIST_HEAD(&port->dev_list); INIT_LIST_HEAD(&port->disco_list); INIT_LIST_HEAD(&port->destroy_list); spin_lock_init(&port->phy_list_lock); INIT_LIST_HEAD(&port->phy_list); port->ha = sas_ha; spin_lock_init(&port->dev_list_lock); } int sas_register_ports(struct sas_ha_struct *sas_ha) { int i; /* initialize the ports and discovery */ for (i = 0; i < sas_ha->num_phys; i++) { struct asd_sas_port *port = sas_ha->sas_port[i]; sas_init_port(port, sas_ha, i); sas_init_disc(&port->disc, port); } return 0; } void sas_unregister_ports(struct sas_ha_struct *sas_ha) { int i; for (i = 0; i < sas_ha->num_phys; i++) if (sas_ha->sas_phy[i]->port) sas_deform_port(sas_ha->sas_phy[i], 0); }