From 2908d778ab3e244900c310974e1fc1c69066e450 Mon Sep 17 00:00:00 2001 From: James Bottomley Date: Tue, 29 Aug 2006 09:22:51 -0500 Subject: [SCSI] aic94xx: new driver This is the end point of the separate aic94xx driver based on the original driver and transport class from Luben Tuikov The log of the separate development is: Alexis Bruemmer: o aic94xx: fix hotplug/unplug for expanderless systems o aic94xx: disable split completion timer/setting by default o aic94xx: wide port off expander support o aic94xx: remove various inline functions o aic94xx: use bitops o aic94xx: remove queue comment o aic94xx: remove sas_common.c o aic94xx: sas remove depot's o aic94xx: use available list_for_each_entry_safe_reverse() o aic94xx: sas header file merge James Bottomley: o aic94xx: fix TF_TMF_NO_CTX processing o aic94xx: convert to request_firmware interface o aic94xx: fix hotplug/unplug o aic94xx: add link error counts to the expander phys o aic94xx: add transport class phy reset capability o aic94xx: remove local_attached flag o Remove README o Fixup Makefile variable for libsas rename o Rename sas->libsas o aic94xx: correct return code for sas_discover_event o aic94xx: use parent backlink port o aic94xx: remove channel abstraction o aic94xx: fix routing algorithms o aic94xx: add backlink port o aic94xx: fix cascaded expander properties o aic94xx: fix sleep under lock o aic94xx: fix panic on module removal in complex topology o aic94xx: make use of the new sas_port o rename sas_port to asd_sas_port o Fix for eh_strategy_handler move o aic94xx: move entirely over to correct transport class formulation o remove last vestages of sas_rphy_alloc() o update for eh_timed_out move o Preliminary expander support for aic94xx o sas: remove event thread o minor warning cleanups o remove last vestiges of id mapping arrays o Further updates o Convert aic94xx over entirely to the transport class end device and o update aic94xx/sas to use the new sas transport class end device o [PATCH] aic94xx: attaching to the sas transport class o Add missing completion removal from prior patch o [PATCH] aic94xx: attaching to the sas transport class o Build fixes from akpm Jeff Garzik: o [scsi aic94xx] Remove ->owner from PCI info table Luben Tuikov: o initial aic94xx driver Mike Anderson: o aic94xx: fix panic on module insertion o aic94xx: stub out SATA_DEV case o aic94xx: compile warning cleanups o aic94xx: sas_alloc_task o aic94xx: ref count update o aic94xx nexus loss time value o [PATCH] aic94xx: driver assertion in non-x86 BIOS env Randy Dunlap: o libsas: externs not needed Robert Tarte: o aic94xx: sequence patch - fixes SATA support Signed-off-by: James Bottomley --- drivers/scsi/libsas/sas_port.c | 279 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 279 insertions(+) create mode 100644 drivers/scsi/libsas/sas_port.c (limited to 'drivers/scsi/libsas/sas_port.c') diff --git a/drivers/scsi/libsas/sas_port.c b/drivers/scsi/libsas/sas_port.c new file mode 100644 index 000000000000..253cdcf306a2 --- /dev/null +++ b/drivers/scsi/libsas/sas_port.c @@ -0,0 +1,279 @@ +/* + * Serial Attached SCSI (SAS) Port class + * + * Copyright (C) 2005 Adaptec, Inc. All rights reserved. + * Copyright (C) 2005 Luben Tuikov + * + * 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 +#include +#include "../scsi_sas_internal.h" + +/** + * 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); + + if (port) { + if (memcmp(port->attached_sas_addr, phy->attached_sas_addr, + SAS_ADDR_SIZE) == 0) + sas_deform_port(phy); + else { + SAS_DPRINTK("%s: phy%d belongs to port%d already(%d)!\n", + __FUNCTION__, phy->id, phy->port->id, + phy->port->num_phys); + return; + } + } + + /* find a port */ + spin_lock(&sas_ha->phy_port_lock); + 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 && + memcmp(port->attached_sas_addr, + phy->attached_sas_addr, SAS_ADDR_SIZE) == 0 && + port->num_phys > 0) { + /* wide port */ + SAS_DPRINTK("phy%d matched wide port%d\n", phy->id, + port->id); + break; + } else 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", + __FUNCTION__); + spin_unlock(&sas_ha->phy_port_lock); + return; + } + + /* add the phy to the port */ + list_add_tail(&phy->port_phy_el, &port->phy_list); + phy->port = port; + port->num_phys++; + port->phy_mask |= (1U << phy->id); + + if (!port->phy) + port->phy = phy->phy; + + SAS_DPRINTK("phy%d added to port%d, phy_mask:0x%x\n", phy->id, + port->id, port->phy_mask); + + 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(&sas_ha->phy_port_lock); + + 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); + + 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) +{ + 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); + + if (!port) + return; /* done by a phy event */ + + if (port->port_dev) + port->port_dev->pathways--; + + if (port->num_phys == 1) { + sas_unregister_domain_devices(port); + sas_port_delete(port->port); + port->port = NULL; + } else + sas_port_delete_phy(port->port, phy->phy); + + + if (si->dft->lldd_port_deformed) + si->dft->lldd_port_deformed(phy); + + spin_lock(&sas_ha->phy_port_lock); + spin_lock(&port->phy_list_lock); + + list_del_init(&phy->port_phy_el); + 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(&sas_ha->phy_port_lock); + + return; +} + +/* ---------- SAS port events ---------- */ + +void sas_porte_bytes_dmaed(void *data) +{ + struct asd_sas_phy *phy = data; + + sas_begin_event(PORTE_BYTES_DMAED, &phy->ha->event_lock, + &phy->port_events_pending); + + sas_form_port(phy); +} + +void sas_porte_broadcast_rcvd(void *data) +{ + unsigned long flags; + u32 prim; + struct asd_sas_phy *phy = data; + + sas_begin_event(PORTE_BROADCAST_RCVD, &phy->ha->event_lock, + &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(void *data) +{ + struct asd_sas_phy *phy = data; + + sas_begin_event(PORTE_LINK_RESET_ERR, &phy->ha->event_lock, + &phy->port_events_pending); + + sas_deform_port(phy); +} + +void sas_porte_timer_event(void *data) +{ + struct asd_sas_phy *phy = data; + + sas_begin_event(PORTE_TIMER_EVENT, &phy->ha->event_lock, + &phy->port_events_pending); + + sas_deform_port(phy); +} + +void sas_porte_hard_reset(void *data) +{ + struct asd_sas_phy *phy = data; + + sas_begin_event(PORTE_HARD_RESET, &phy->ha->event_lock, + &phy->port_events_pending); + + sas_deform_port(phy); +} + +/* ---------- SAS port registration ---------- */ + +static void sas_init_port(struct asd_sas_port *port, + struct sas_ha_struct *sas_ha, int i) +{ + port->id = i; + INIT_LIST_HEAD(&port->dev_list); + spin_lock_init(&port->phy_list_lock); + INIT_LIST_HEAD(&port->phy_list); + port->num_phys = 0; + port->phy_mask = 0; + 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]); + +} -- cgit v1.2.3-59-g8ed1b