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_expander.c | 1862 ++++++++++++++++++++++++++++++++++++ 1 file changed, 1862 insertions(+) create mode 100644 drivers/scsi/libsas/sas_expander.c (limited to 'drivers/scsi/libsas/sas_expander.c') diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c new file mode 100644 index 000000000000..b653a263f76a --- /dev/null +++ b/drivers/scsi/libsas/sas_expander.c @@ -0,0 +1,1862 @@ +/* + * Serial Attached SCSI (SAS) Expander discovery and configuration + * + * 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 +#include + +#include "sas_internal.h" + +#include +#include +#include "../scsi_sas_internal.h" + +static int sas_discover_expander(struct domain_device *dev); +static int sas_configure_routing(struct domain_device *dev, u8 *sas_addr); +static int sas_configure_phy(struct domain_device *dev, int phy_id, + u8 *sas_addr, int include); +static int sas_disable_routing(struct domain_device *dev, u8 *sas_addr); + +#if 0 +/* FIXME: smp needs to migrate into the sas class */ +static ssize_t smp_portal_read(struct kobject *, char *, loff_t, size_t); +static ssize_t smp_portal_write(struct kobject *, char *, loff_t, size_t); +#endif + +/* ---------- SMP task management ---------- */ + +static void smp_task_timedout(unsigned long _task) +{ + struct sas_task *task = (void *) _task; + unsigned long flags; + + spin_lock_irqsave(&task->task_state_lock, flags); + if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) + task->task_state_flags |= SAS_TASK_STATE_ABORTED; + spin_unlock_irqrestore(&task->task_state_lock, flags); + + complete(&task->completion); +} + +static void smp_task_done(struct sas_task *task) +{ + if (!del_timer(&task->timer)) + return; + complete(&task->completion); +} + +/* Give it some long enough timeout. In seconds. */ +#define SMP_TIMEOUT 10 + +static int smp_execute_task(struct domain_device *dev, void *req, int req_size, + void *resp, int resp_size) +{ + int res; + struct sas_task *task = sas_alloc_task(GFP_KERNEL); + struct sas_internal *i = + to_sas_internal(dev->port->ha->core.shost->transportt); + + if (!task) + return -ENOMEM; + + task->dev = dev; + task->task_proto = dev->tproto; + sg_init_one(&task->smp_task.smp_req, req, req_size); + sg_init_one(&task->smp_task.smp_resp, resp, resp_size); + + task->task_done = smp_task_done; + + task->timer.data = (unsigned long) task; + task->timer.function = smp_task_timedout; + task->timer.expires = jiffies + SMP_TIMEOUT*HZ; + add_timer(&task->timer); + + res = i->dft->lldd_execute_task(task, 1, GFP_KERNEL); + + if (res) { + del_timer(&task->timer); + SAS_DPRINTK("executing SMP task failed:%d\n", res); + goto ex_err; + } + + wait_for_completion(&task->completion); + res = -ETASK; + if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) { + SAS_DPRINTK("smp task timed out or aborted\n"); + i->dft->lldd_abort_task(task); + if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) { + SAS_DPRINTK("SMP task aborted and not done\n"); + goto ex_err; + } + } + if (task->task_status.resp == SAS_TASK_COMPLETE && + task->task_status.stat == SAM_GOOD) + res = 0; + else + SAS_DPRINTK("%s: task to dev %016llx response: 0x%x " + "status 0x%x\n", __FUNCTION__, + SAS_ADDR(dev->sas_addr), + task->task_status.resp, + task->task_status.stat); +ex_err: + sas_free_task(task); + return res; +} + +/* ---------- Allocations ---------- */ + +static inline void *alloc_smp_req(int size) +{ + u8 *p = kzalloc(size, GFP_KERNEL); + if (p) + p[0] = SMP_REQUEST; + return p; +} + +static inline void *alloc_smp_resp(int size) +{ + return kzalloc(size, GFP_KERNEL); +} + +/* ---------- Expander configuration ---------- */ + +static void sas_set_ex_phy(struct domain_device *dev, int phy_id, + void *disc_resp) +{ + struct expander_device *ex = &dev->ex_dev; + struct ex_phy *phy = &ex->ex_phy[phy_id]; + struct smp_resp *resp = disc_resp; + struct discover_resp *dr = &resp->disc; + struct sas_rphy *rphy = dev->rphy; + int rediscover = (phy->phy != NULL); + + if (!rediscover) { + phy->phy = sas_phy_alloc(&rphy->dev, phy_id); + + /* FIXME: error_handling */ + BUG_ON(!phy->phy); + } + + switch (resp->result) { + case SMP_RESP_PHY_VACANT: + phy->phy_state = PHY_VACANT; + return; + default: + phy->phy_state = PHY_NOT_PRESENT; + return; + case SMP_RESP_FUNC_ACC: + phy->phy_state = PHY_EMPTY; /* do not know yet */ + break; + } + + phy->phy_id = phy_id; + phy->attached_dev_type = dr->attached_dev_type; + phy->linkrate = dr->linkrate; + phy->attached_sata_host = dr->attached_sata_host; + phy->attached_sata_dev = dr->attached_sata_dev; + phy->attached_sata_ps = dr->attached_sata_ps; + phy->attached_iproto = dr->iproto << 1; + phy->attached_tproto = dr->tproto << 1; + memcpy(phy->attached_sas_addr, dr->attached_sas_addr, SAS_ADDR_SIZE); + phy->attached_phy_id = dr->attached_phy_id; + phy->phy_change_count = dr->change_count; + phy->routing_attr = dr->routing_attr; + phy->virtual = dr->virtual; + phy->last_da_index = -1; + + phy->phy->identify.initiator_port_protocols = phy->attached_iproto; + phy->phy->identify.target_port_protocols = phy->attached_tproto; + phy->phy->identify.phy_identifier = phy_id; + phy->phy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS; + phy->phy->maximum_linkrate_hw = SAS_LINK_RATE_3_0_GBPS; + phy->phy->minimum_linkrate = SAS_LINK_RATE_1_5_GBPS; + phy->phy->maximum_linkrate = SAS_LINK_RATE_3_0_GBPS; + switch (phy->linkrate) { + case PHY_LINKRATE_1_5: + phy->phy->negotiated_linkrate = SAS_LINK_RATE_1_5_GBPS; + break; + case PHY_LINKRATE_3: + phy->phy->negotiated_linkrate = SAS_LINK_RATE_3_0_GBPS; + break; + case PHY_LINKRATE_6: + phy->phy->negotiated_linkrate = SAS_LINK_RATE_6_0_GBPS; + break; + default: + phy->phy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN; + break; + } + + if (!rediscover) + sas_phy_add(phy->phy); + + SAS_DPRINTK("ex %016llx phy%02d:%c attached: %016llx\n", + SAS_ADDR(dev->sas_addr), phy->phy_id, + phy->routing_attr == TABLE_ROUTING ? 'T' : + phy->routing_attr == DIRECT_ROUTING ? 'D' : + phy->routing_attr == SUBTRACTIVE_ROUTING ? 'S' : '?', + SAS_ADDR(phy->attached_sas_addr)); + + return; +} + +#define DISCOVER_REQ_SIZE 16 +#define DISCOVER_RESP_SIZE 56 + +static int sas_ex_phy_discover(struct domain_device *dev, int single) +{ + struct expander_device *ex = &dev->ex_dev; + int res = 0; + u8 *disc_req; + u8 *disc_resp; + + disc_req = alloc_smp_req(DISCOVER_REQ_SIZE); + if (!disc_req) + return -ENOMEM; + + disc_resp = alloc_smp_req(DISCOVER_RESP_SIZE); + if (!disc_resp) { + kfree(disc_req); + return -ENOMEM; + } + + disc_req[1] = SMP_DISCOVER; + + if (0 <= single && single < ex->num_phys) { + disc_req[9] = single; + res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE, + disc_resp, DISCOVER_RESP_SIZE); + if (res) + goto out_err; + sas_set_ex_phy(dev, single, disc_resp); + } else { + int i; + + for (i = 0; i < ex->num_phys; i++) { + disc_req[9] = i; + res = smp_execute_task(dev, disc_req, + DISCOVER_REQ_SIZE, disc_resp, + DISCOVER_RESP_SIZE); + if (res) + goto out_err; + sas_set_ex_phy(dev, i, disc_resp); + } + } +out_err: + kfree(disc_resp); + kfree(disc_req); + return res; +} + +static int sas_expander_discover(struct domain_device *dev) +{ + struct expander_device *ex = &dev->ex_dev; + int res = -ENOMEM; + + ex->ex_phy = kzalloc(sizeof(*ex->ex_phy)*ex->num_phys, GFP_KERNEL); + if (!ex->ex_phy) + return -ENOMEM; + + res = sas_ex_phy_discover(dev, -1); + if (res) + goto out_err; + + return 0; + out_err: + kfree(ex->ex_phy); + ex->ex_phy = NULL; + return res; +} + +#define MAX_EXPANDER_PHYS 128 + +static void ex_assign_report_general(struct domain_device *dev, + struct smp_resp *resp) +{ + struct report_general_resp *rg = &resp->rg; + + dev->ex_dev.ex_change_count = be16_to_cpu(rg->change_count); + dev->ex_dev.max_route_indexes = be16_to_cpu(rg->route_indexes); + dev->ex_dev.num_phys = min(rg->num_phys, (u8)MAX_EXPANDER_PHYS); + dev->ex_dev.conf_route_table = rg->conf_route_table; + dev->ex_dev.configuring = rg->configuring; + memcpy(dev->ex_dev.enclosure_logical_id, rg->enclosure_logical_id, 8); +} + +#define RG_REQ_SIZE 8 +#define RG_RESP_SIZE 32 + +static int sas_ex_general(struct domain_device *dev) +{ + u8 *rg_req; + struct smp_resp *rg_resp; + int res; + int i; + + rg_req = alloc_smp_req(RG_REQ_SIZE); + if (!rg_req) + return -ENOMEM; + + rg_resp = alloc_smp_resp(RG_RESP_SIZE); + if (!rg_resp) { + kfree(rg_req); + return -ENOMEM; + } + + rg_req[1] = SMP_REPORT_GENERAL; + + for (i = 0; i < 5; i++) { + res = smp_execute_task(dev, rg_req, RG_REQ_SIZE, rg_resp, + RG_RESP_SIZE); + + if (res) { + SAS_DPRINTK("RG to ex %016llx failed:0x%x\n", + SAS_ADDR(dev->sas_addr), res); + goto out; + } else if (rg_resp->result != SMP_RESP_FUNC_ACC) { + SAS_DPRINTK("RG:ex %016llx returned SMP result:0x%x\n", + SAS_ADDR(dev->sas_addr), rg_resp->result); + res = rg_resp->result; + goto out; + } + + ex_assign_report_general(dev, rg_resp); + + if (dev->ex_dev.configuring) { + SAS_DPRINTK("RG: ex %llx self-configuring...\n", + SAS_ADDR(dev->sas_addr)); + schedule_timeout_interruptible(5*HZ); + } else + break; + } +out: + kfree(rg_req); + kfree(rg_resp); + return res; +} + +static void ex_assign_manuf_info(struct domain_device *dev, void + *_mi_resp) +{ + u8 *mi_resp = _mi_resp; + struct sas_rphy *rphy = dev->rphy; + struct sas_expander_device *edev = rphy_to_expander_device(rphy); + + memcpy(edev->vendor_id, mi_resp + 12, SAS_EXPANDER_VENDOR_ID_LEN); + memcpy(edev->product_id, mi_resp + 20, SAS_EXPANDER_PRODUCT_ID_LEN); + memcpy(edev->product_rev, mi_resp + 36, + SAS_EXPANDER_PRODUCT_REV_LEN); + + if (mi_resp[8] & 1) { + memcpy(edev->component_vendor_id, mi_resp + 40, + SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN); + edev->component_id = mi_resp[48] << 8 | mi_resp[49]; + edev->component_revision_id = mi_resp[50]; + } +} + +#define MI_REQ_SIZE 8 +#define MI_RESP_SIZE 64 + +static int sas_ex_manuf_info(struct domain_device *dev) +{ + u8 *mi_req; + u8 *mi_resp; + int res; + + mi_req = alloc_smp_req(MI_REQ_SIZE); + if (!mi_req) + return -ENOMEM; + + mi_resp = alloc_smp_resp(MI_RESP_SIZE); + if (!mi_resp) { + kfree(mi_req); + return -ENOMEM; + } + + mi_req[1] = SMP_REPORT_MANUF_INFO; + + res = smp_execute_task(dev, mi_req, MI_REQ_SIZE, mi_resp,MI_RESP_SIZE); + if (res) { + SAS_DPRINTK("MI: ex %016llx failed:0x%x\n", + SAS_ADDR(dev->sas_addr), res); + goto out; + } else if (mi_resp[2] != SMP_RESP_FUNC_ACC) { + SAS_DPRINTK("MI ex %016llx returned SMP result:0x%x\n", + SAS_ADDR(dev->sas_addr), mi_resp[2]); + goto out; + } + + ex_assign_manuf_info(dev, mi_resp); +out: + kfree(mi_req); + kfree(mi_resp); + return res; +} + +#define PC_REQ_SIZE 44 +#define PC_RESP_SIZE 8 + +int sas_smp_phy_control(struct domain_device *dev, int phy_id, + enum phy_func phy_func) +{ + u8 *pc_req; + u8 *pc_resp; + int res; + + pc_req = alloc_smp_req(PC_REQ_SIZE); + if (!pc_req) + return -ENOMEM; + + pc_resp = alloc_smp_resp(PC_RESP_SIZE); + if (!pc_resp) { + kfree(pc_req); + return -ENOMEM; + } + + pc_req[1] = SMP_PHY_CONTROL; + pc_req[9] = phy_id; + pc_req[10]= phy_func; + + res = smp_execute_task(dev, pc_req, PC_REQ_SIZE, pc_resp,PC_RESP_SIZE); + + kfree(pc_resp); + kfree(pc_req); + return res; +} + +static void sas_ex_disable_phy(struct domain_device *dev, int phy_id) +{ + struct expander_device *ex = &dev->ex_dev; + struct ex_phy *phy = &ex->ex_phy[phy_id]; + + sas_smp_phy_control(dev, phy_id, PHY_FUNC_DISABLE); + phy->linkrate = PHY_DISABLED; +} + +static void sas_ex_disable_port(struct domain_device *dev, u8 *sas_addr) +{ + struct expander_device *ex = &dev->ex_dev; + int i; + + for (i = 0; i < ex->num_phys; i++) { + struct ex_phy *phy = &ex->ex_phy[i]; + + if (phy->phy_state == PHY_VACANT || + phy->phy_state == PHY_NOT_PRESENT) + continue; + + if (SAS_ADDR(phy->attached_sas_addr) == SAS_ADDR(sas_addr)) + sas_ex_disable_phy(dev, i); + } +} + +static int sas_dev_present_in_domain(struct asd_sas_port *port, + u8 *sas_addr) +{ + struct domain_device *dev; + + if (SAS_ADDR(port->sas_addr) == SAS_ADDR(sas_addr)) + return 1; + list_for_each_entry(dev, &port->dev_list, dev_list_node) { + if (SAS_ADDR(dev->sas_addr) == SAS_ADDR(sas_addr)) + return 1; + } + return 0; +} + +#define RPEL_REQ_SIZE 16 +#define RPEL_RESP_SIZE 32 +int sas_smp_get_phy_events(struct sas_phy *phy) +{ + int res; + struct sas_rphy *rphy = dev_to_rphy(phy->dev.parent); + struct domain_device *dev = sas_find_dev_by_rphy(rphy); + u8 *req = alloc_smp_req(RPEL_REQ_SIZE); + u8 *resp = kzalloc(RPEL_RESP_SIZE, GFP_KERNEL); + + if (!resp) + return -ENOMEM; + + req[1] = SMP_REPORT_PHY_ERR_LOG; + req[9] = phy->number; + + res = smp_execute_task(dev, req, RPEL_REQ_SIZE, + resp, RPEL_RESP_SIZE); + + if (!res) + goto out; + + phy->invalid_dword_count = scsi_to_u32(&resp[12]); + phy->running_disparity_error_count = scsi_to_u32(&resp[16]); + phy->loss_of_dword_sync_count = scsi_to_u32(&resp[20]); + phy->phy_reset_problem_count = scsi_to_u32(&resp[24]); + + out: + kfree(resp); + return res; + +} + +#define RPS_REQ_SIZE 16 +#define RPS_RESP_SIZE 60 + +static int sas_get_report_phy_sata(struct domain_device *dev, + int phy_id, + struct smp_resp *rps_resp) +{ + int res; + u8 *rps_req = alloc_smp_req(RPS_REQ_SIZE); + + if (!rps_req) + return -ENOMEM; + + rps_req[1] = SMP_REPORT_PHY_SATA; + rps_req[9] = phy_id; + + res = smp_execute_task(dev, rps_req, RPS_REQ_SIZE, + rps_resp, RPS_RESP_SIZE); + + kfree(rps_req); + return 0; +} + +static void sas_ex_get_linkrate(struct domain_device *parent, + struct domain_device *child, + struct ex_phy *parent_phy) +{ + struct expander_device *parent_ex = &parent->ex_dev; + struct sas_port *port; + int i; + + child->pathways = 0; + + port = parent_phy->port; + + for (i = 0; i < parent_ex->num_phys; i++) { + struct ex_phy *phy = &parent_ex->ex_phy[i]; + + if (phy->phy_state == PHY_VACANT || + phy->phy_state == PHY_NOT_PRESENT) + continue; + + if (SAS_ADDR(phy->attached_sas_addr) == + SAS_ADDR(child->sas_addr)) { + + child->min_linkrate = min(parent->min_linkrate, + phy->linkrate); + child->max_linkrate = max(parent->max_linkrate, + phy->linkrate); + child->pathways++; + sas_port_add_phy(port, phy->phy); + } + } + child->linkrate = min(parent_phy->linkrate, child->max_linkrate); + child->pathways = min(child->pathways, parent->pathways); +} + +static struct domain_device *sas_ex_discover_end_dev( + struct domain_device *parent, int phy_id) +{ + struct expander_device *parent_ex = &parent->ex_dev; + struct ex_phy *phy = &parent_ex->ex_phy[phy_id]; + struct domain_device *child = NULL; + struct sas_rphy *rphy; + int res; + + if (phy->attached_sata_host || phy->attached_sata_ps) + return NULL; + + child = kzalloc(sizeof(*child), GFP_KERNEL); + if (!child) + return NULL; + + child->parent = parent; + child->port = parent->port; + child->iproto = phy->attached_iproto; + memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE); + sas_hash_addr(child->hashed_sas_addr, child->sas_addr); + phy->port = sas_port_alloc(&parent->rphy->dev, phy_id); + BUG_ON(!phy->port); + /* FIXME: better error handling*/ + BUG_ON(sas_port_add(phy->port) != 0); + sas_ex_get_linkrate(parent, child, phy); + + if ((phy->attached_tproto & SAS_PROTO_STP) || phy->attached_sata_dev) { + child->dev_type = SATA_DEV; + if (phy->attached_tproto & SAS_PROTO_STP) + child->tproto = phy->attached_tproto; + if (phy->attached_sata_dev) + child->tproto |= SATA_DEV; + res = sas_get_report_phy_sata(parent, phy_id, + &child->sata_dev.rps_resp); + if (res) { + SAS_DPRINTK("report phy sata to %016llx:0x%x returned " + "0x%x\n", SAS_ADDR(parent->sas_addr), + phy_id, res); + kfree(child); + return NULL; + } + memcpy(child->frame_rcvd, &child->sata_dev.rps_resp.rps.fis, + sizeof(struct dev_to_host_fis)); + sas_init_dev(child); + res = sas_discover_sata(child); + if (res) { + SAS_DPRINTK("sas_discover_sata() for device %16llx at " + "%016llx:0x%x returned 0x%x\n", + SAS_ADDR(child->sas_addr), + SAS_ADDR(parent->sas_addr), phy_id, res); + kfree(child); + return NULL; + } + } else if (phy->attached_tproto & SAS_PROTO_SSP) { + child->dev_type = SAS_END_DEV; + rphy = sas_end_device_alloc(phy->port); + /* FIXME: error handling */ + BUG_ON(!rphy); + child->tproto = phy->attached_tproto; + sas_init_dev(child); + + child->rphy = rphy; + sas_fill_in_rphy(child, rphy); + + spin_lock(&parent->port->dev_list_lock); + list_add_tail(&child->dev_list_node, &parent->port->dev_list); + spin_unlock(&parent->port->dev_list_lock); + + res = sas_discover_end_dev(child); + if (res) { + SAS_DPRINTK("sas_discover_end_dev() for device %16llx " + "at %016llx:0x%x returned 0x%x\n", + SAS_ADDR(child->sas_addr), + SAS_ADDR(parent->sas_addr), phy_id, res); + /* FIXME: this kfrees list elements without removing them */ + //kfree(child); + return NULL; + } + } else { + SAS_DPRINTK("target proto 0x%x at %016llx:0x%x not handled\n", + phy->attached_tproto, SAS_ADDR(parent->sas_addr), + phy_id); + } + + list_add_tail(&child->siblings, &parent_ex->children); + return child; +} + +static struct domain_device *sas_ex_discover_expander( + struct domain_device *parent, int phy_id) +{ + struct sas_expander_device *parent_ex = rphy_to_expander_device(parent->rphy); + struct ex_phy *phy = &parent->ex_dev.ex_phy[phy_id]; + struct domain_device *child = NULL; + struct sas_rphy *rphy; + struct sas_expander_device *edev; + struct asd_sas_port *port; + int res; + + if (phy->routing_attr == DIRECT_ROUTING) { + SAS_DPRINTK("ex %016llx:0x%x:D <--> ex %016llx:0x%x is not " + "allowed\n", + SAS_ADDR(parent->sas_addr), phy_id, + SAS_ADDR(phy->attached_sas_addr), + phy->attached_phy_id); + return NULL; + } + child = kzalloc(sizeof(*child), GFP_KERNEL); + if (!child) + return NULL; + + phy->port = sas_port_alloc(&parent->rphy->dev, phy_id); + /* FIXME: better error handling */ + BUG_ON(sas_port_add(phy->port) != 0); + + + switch (phy->attached_dev_type) { + case EDGE_DEV: + rphy = sas_expander_alloc(phy->port, + SAS_EDGE_EXPANDER_DEVICE); + break; + case FANOUT_DEV: + rphy = sas_expander_alloc(phy->port, + SAS_FANOUT_EXPANDER_DEVICE); + break; + default: + rphy = NULL; /* shut gcc up */ + BUG(); + } + port = parent->port; + child->rphy = rphy; + edev = rphy_to_expander_device(rphy); + child->dev_type = phy->attached_dev_type; + child->parent = parent; + child->port = port; + child->iproto = phy->attached_iproto; + child->tproto = phy->attached_tproto; + memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE); + sas_hash_addr(child->hashed_sas_addr, child->sas_addr); + sas_ex_get_linkrate(parent, child, phy); + edev->level = parent_ex->level + 1; + parent->port->disc.max_level = max(parent->port->disc.max_level, + edev->level); + sas_init_dev(child); + sas_fill_in_rphy(child, rphy); + sas_rphy_add(rphy); + + spin_lock(&parent->port->dev_list_lock); + list_add_tail(&child->dev_list_node, &parent->port->dev_list); + spin_unlock(&parent->port->dev_list_lock); + + res = sas_discover_expander(child); + if (res) { + kfree(child); + return NULL; + } + list_add_tail(&child->siblings, &parent->ex_dev.children); + return child; +} + +static int sas_ex_discover_dev(struct domain_device *dev, int phy_id) +{ + struct expander_device *ex = &dev->ex_dev; + struct ex_phy *ex_phy = &ex->ex_phy[phy_id]; + struct domain_device *child = NULL; + int res = 0; + + /* Phy state */ + if (ex_phy->linkrate == PHY_SPINUP_HOLD) { + if (!sas_smp_phy_control(dev, phy_id, PHY_FUNC_LINK_RESET)) + res = sas_ex_phy_discover(dev, phy_id); + if (res) + return res; + } + + /* Parent and domain coherency */ + if (!dev->parent && (SAS_ADDR(ex_phy->attached_sas_addr) == + SAS_ADDR(dev->port->sas_addr))) { + sas_add_parent_port(dev, phy_id); + return 0; + } + if (dev->parent && (SAS_ADDR(ex_phy->attached_sas_addr) == + SAS_ADDR(dev->parent->sas_addr))) { + sas_add_parent_port(dev, phy_id); + if (ex_phy->routing_attr == TABLE_ROUTING) + sas_configure_phy(dev, phy_id, dev->port->sas_addr, 1); + return 0; + } + + if (sas_dev_present_in_domain(dev->port, ex_phy->attached_sas_addr)) + sas_ex_disable_port(dev, ex_phy->attached_sas_addr); + + if (ex_phy->attached_dev_type == NO_DEVICE) { + if (ex_phy->routing_attr == DIRECT_ROUTING) { + memset(ex_phy->attached_sas_addr, 0, SAS_ADDR_SIZE); + sas_configure_routing(dev, ex_phy->attached_sas_addr); + } + return 0; + } else if (ex_phy->linkrate == PHY_LINKRATE_UNKNOWN) + return 0; + + if (ex_phy->attached_dev_type != SAS_END_DEV && + ex_phy->attached_dev_type != FANOUT_DEV && + ex_phy->attached_dev_type != EDGE_DEV) { + SAS_DPRINTK("unknown device type(0x%x) attached to ex %016llx " + "phy 0x%x\n", ex_phy->attached_dev_type, + SAS_ADDR(dev->sas_addr), + phy_id); + return 0; + } + + res = sas_configure_routing(dev, ex_phy->attached_sas_addr); + if (res) { + SAS_DPRINTK("configure routing for dev %016llx " + "reported 0x%x. Forgotten\n", + SAS_ADDR(ex_phy->attached_sas_addr), res); + sas_disable_routing(dev, ex_phy->attached_sas_addr); + return res; + } + + switch (ex_phy->attached_dev_type) { + case SAS_END_DEV: + child = sas_ex_discover_end_dev(dev, phy_id); + break; + case FANOUT_DEV: + if (SAS_ADDR(dev->port->disc.fanout_sas_addr)) { + SAS_DPRINTK("second fanout expander %016llx phy 0x%x " + "attached to ex %016llx phy 0x%x\n", + SAS_ADDR(ex_phy->attached_sas_addr), + ex_phy->attached_phy_id, + SAS_ADDR(dev->sas_addr), + phy_id); + sas_ex_disable_phy(dev, phy_id); + break; + } else + memcpy(dev->port->disc.fanout_sas_addr, + ex_phy->attached_sas_addr, SAS_ADDR_SIZE); + /* fallthrough */ + case EDGE_DEV: + child = sas_ex_discover_expander(dev, phy_id); + break; + default: + break; + } + + if (child) { + int i; + + for (i = 0; i < ex->num_phys; i++) { + if (ex->ex_phy[i].phy_state == PHY_VACANT || + ex->ex_phy[i].phy_state == PHY_NOT_PRESENT) + continue; + + if (SAS_ADDR(ex->ex_phy[i].attached_sas_addr) == + SAS_ADDR(child->sas_addr)) + ex->ex_phy[i].phy_state= PHY_DEVICE_DISCOVERED; + } + } + + return res; +} + +static int sas_find_sub_addr(struct domain_device *dev, u8 *sub_addr) +{ + struct expander_device *ex = &dev->ex_dev; + int i; + + for (i = 0; i < ex->num_phys; i++) { + struct ex_phy *phy = &ex->ex_phy[i]; + + if (phy->phy_state == PHY_VACANT || + phy->phy_state == PHY_NOT_PRESENT) + continue; + + if ((phy->attached_dev_type == EDGE_DEV || + phy->attached_dev_type == FANOUT_DEV) && + phy->routing_attr == SUBTRACTIVE_ROUTING) { + + memcpy(sub_addr, phy->attached_sas_addr,SAS_ADDR_SIZE); + + return 1; + } + } + return 0; +} + +static int sas_check_level_subtractive_boundary(struct domain_device *dev) +{ + struct expander_device *ex = &dev->ex_dev; + struct domain_device *child; + u8 sub_addr[8] = {0, }; + + list_for_each_entry(child, &ex->children, siblings) { + if (child->dev_type != EDGE_DEV && + child->dev_type != FANOUT_DEV) + continue; + if (sub_addr[0] == 0) { + sas_find_sub_addr(child, sub_addr); + continue; + } else { + u8 s2[8]; + + if (sas_find_sub_addr(child, s2) && + (SAS_ADDR(sub_addr) != SAS_ADDR(s2))) { + + SAS_DPRINTK("ex %016llx->%016llx-?->%016llx " + "diverges from subtractive " + "boundary %016llx\n", + SAS_ADDR(dev->sas_addr), + SAS_ADDR(child->sas_addr), + SAS_ADDR(s2), + SAS_ADDR(sub_addr)); + + sas_ex_disable_port(child, s2); + } + } + } + return 0; +} +/** + * sas_ex_discover_devices -- discover devices attached to this expander + * dev: pointer to the expander domain device + * single: if you want to do a single phy, else set to -1; + * + * Configure this expander for use with its devices and register the + * devices of this expander. + */ +static int sas_ex_discover_devices(struct domain_device *dev, int single) +{ + struct expander_device *ex = &dev->ex_dev; + int i = 0, end = ex->num_phys; + int res = 0; + + if (0 <= single && single < end) { + i = single; + end = i+1; + } + + for ( ; i < end; i++) { + struct ex_phy *ex_phy = &ex->ex_phy[i]; + + if (ex_phy->phy_state == PHY_VACANT || + ex_phy->phy_state == PHY_NOT_PRESENT || + ex_phy->phy_state == PHY_DEVICE_DISCOVERED) + continue; + + switch (ex_phy->linkrate) { + case PHY_DISABLED: + case PHY_RESET_PROBLEM: + case PHY_PORT_SELECTOR: + continue; + default: + res = sas_ex_discover_dev(dev, i); + if (res) + break; + continue; + } + } + + if (!res) + sas_check_level_subtractive_boundary(dev); + + return res; +} + +static int sas_check_ex_subtractive_boundary(struct domain_device *dev) +{ + struct expander_device *ex = &dev->ex_dev; + int i; + u8 *sub_sas_addr = NULL; + + if (dev->dev_type != EDGE_DEV) + return 0; + + for (i = 0; i < ex->num_phys; i++) { + struct ex_phy *phy = &ex->ex_phy[i]; + + if (phy->phy_state == PHY_VACANT || + phy->phy_state == PHY_NOT_PRESENT) + continue; + + if ((phy->attached_dev_type == FANOUT_DEV || + phy->attached_dev_type == EDGE_DEV) && + phy->routing_attr == SUBTRACTIVE_ROUTING) { + + if (!sub_sas_addr) + sub_sas_addr = &phy->attached_sas_addr[0]; + else if (SAS_ADDR(sub_sas_addr) != + SAS_ADDR(phy->attached_sas_addr)) { + + SAS_DPRINTK("ex %016llx phy 0x%x " + "diverges(%016llx) on subtractive " + "boundary(%016llx). Disabled\n", + SAS_ADDR(dev->sas_addr), i, + SAS_ADDR(phy->attached_sas_addr), + SAS_ADDR(sub_sas_addr)); + sas_ex_disable_phy(dev, i); + } + } + } + return 0; +} + +static void sas_print_parent_topology_bug(struct domain_device *child, + struct ex_phy *parent_phy, + struct ex_phy *child_phy) +{ + static const char ra_char[] = { + [DIRECT_ROUTING] = 'D', + [SUBTRACTIVE_ROUTING] = 'S', + [TABLE_ROUTING] = 'T', + }; + static const char *ex_type[] = { + [EDGE_DEV] = "edge", + [FANOUT_DEV] = "fanout", + }; + struct domain_device *parent = child->parent; + + sas_printk("%s ex %016llx phy 0x%x <--> %s ex %016llx phy 0x%x " + "has %c:%c routing link!\n", + + ex_type[parent->dev_type], + SAS_ADDR(parent->sas_addr), + parent_phy->phy_id, + + ex_type[child->dev_type], + SAS_ADDR(child->sas_addr), + child_phy->phy_id, + + ra_char[parent_phy->routing_attr], + ra_char[child_phy->routing_attr]); +} + +static int sas_check_eeds(struct domain_device *child, + struct ex_phy *parent_phy, + struct ex_phy *child_phy) +{ + int res = 0; + struct domain_device *parent = child->parent; + + if (SAS_ADDR(parent->port->disc.fanout_sas_addr) != 0) { + res = -ENODEV; + SAS_DPRINTK("edge ex %016llx phy S:0x%x <--> edge ex %016llx " + "phy S:0x%x, while there is a fanout ex %016llx\n", + SAS_ADDR(parent->sas_addr), + parent_phy->phy_id, + SAS_ADDR(child->sas_addr), + child_phy->phy_id, + SAS_ADDR(parent->port->disc.fanout_sas_addr)); + } else if (SAS_ADDR(parent->port->disc.eeds_a) == 0) { + memcpy(parent->port->disc.eeds_a, parent->sas_addr, + SAS_ADDR_SIZE); + memcpy(parent->port->disc.eeds_b, child->sas_addr, + SAS_ADDR_SIZE); + } else if (((SAS_ADDR(parent->port->disc.eeds_a) == + SAS_ADDR(parent->sas_addr)) || + (SAS_ADDR(parent->port->disc.eeds_a) == + SAS_ADDR(child->sas_addr))) + && + ((SAS_ADDR(parent->port->disc.eeds_b) == + SAS_ADDR(parent->sas_addr)) || + (SAS_ADDR(parent->port->disc.eeds_b) == + SAS_ADDR(child->sas_addr)))) + ; + else { + res = -ENODEV; + SAS_DPRINTK("edge ex %016llx phy 0x%x <--> edge ex %016llx " + "phy 0x%x link forms a third EEDS!\n", + SAS_ADDR(parent->sas_addr), + parent_phy->phy_id, + SAS_ADDR(child->sas_addr), + child_phy->phy_id); + } + + return res; +} + +/* Here we spill over 80 columns. It is intentional. + */ +static int sas_check_parent_topology(struct domain_device *child) +{ + struct expander_device *child_ex = &child->ex_dev; + struct expander_device *parent_ex; + int i; + int res = 0; + + if (!child->parent) + return 0; + + if (child->parent->dev_type != EDGE_DEV && + child->parent->dev_type != FANOUT_DEV) + return 0; + + parent_ex = &child->parent->ex_dev; + + for (i = 0; i < parent_ex->num_phys; i++) { + struct ex_phy *parent_phy = &parent_ex->ex_phy[i]; + struct ex_phy *child_phy; + + if (parent_phy->phy_state == PHY_VACANT || + parent_phy->phy_state == PHY_NOT_PRESENT) + continue; + + if (SAS_ADDR(parent_phy->attached_sas_addr) != SAS_ADDR(child->sas_addr)) + continue; + + child_phy = &child_ex->ex_phy[parent_phy->attached_phy_id]; + + switch (child->parent->dev_type) { + case EDGE_DEV: + if (child->dev_type == FANOUT_DEV) { + if (parent_phy->routing_attr != SUBTRACTIVE_ROUTING || + child_phy->routing_attr != TABLE_ROUTING) { + sas_print_parent_topology_bug(child, parent_phy, child_phy); + res = -ENODEV; + } + } else if (parent_phy->routing_attr == SUBTRACTIVE_ROUTING) { + if (child_phy->routing_attr == SUBTRACTIVE_ROUTING) { + res = sas_check_eeds(child, parent_phy, child_phy); + } else if (child_phy->routing_attr != TABLE_ROUTING) { + sas_print_parent_topology_bug(child, parent_phy, child_phy); + res = -ENODEV; + } + } else if (parent_phy->routing_attr == TABLE_ROUTING && + child_phy->routing_attr != SUBTRACTIVE_ROUTING) { + sas_print_parent_topology_bug(child, parent_phy, child_phy); + res = -ENODEV; + } + break; + case FANOUT_DEV: + if (parent_phy->routing_attr != TABLE_ROUTING || + child_phy->routing_attr != SUBTRACTIVE_ROUTING) { + sas_print_parent_topology_bug(child, parent_phy, child_phy); + res = -ENODEV; + } + break; + default: + break; + } + } + + return res; +} + +#define RRI_REQ_SIZE 16 +#define RRI_RESP_SIZE 44 + +static int sas_configure_present(struct domain_device *dev, int phy_id, + u8 *sas_addr, int *index, int *present) +{ + int i, res = 0; + struct expander_device *ex = &dev->ex_dev; + struct ex_phy *phy = &ex->ex_phy[phy_id]; + u8 *rri_req; + u8 *rri_resp; + + *present = 0; + *index = 0; + + rri_req = alloc_smp_req(RRI_REQ_SIZE); + if (!rri_req) + return -ENOMEM; + + rri_resp = alloc_smp_resp(RRI_RESP_SIZE); + if (!rri_resp) { + kfree(rri_req); + return -ENOMEM; + } + + rri_req[1] = SMP_REPORT_ROUTE_INFO; + rri_req[9] = phy_id; + + for (i = 0; i < ex->max_route_indexes ; i++) { + *(__be16 *)(rri_req+6) = cpu_to_be16(i); + res = smp_execute_task(dev, rri_req, RRI_REQ_SIZE, rri_resp, + RRI_RESP_SIZE); + if (res) + goto out; + res = rri_resp[2]; + if (res == SMP_RESP_NO_INDEX) { + SAS_DPRINTK("overflow of indexes: dev %016llx " + "phy 0x%x index 0x%x\n", + SAS_ADDR(dev->sas_addr), phy_id, i); + goto out; + } else if (res != SMP_RESP_FUNC_ACC) { + SAS_DPRINTK("%s: dev %016llx phy 0x%x index 0x%x " + "result 0x%x\n", __FUNCTION__, + SAS_ADDR(dev->sas_addr), phy_id, i, res); + goto out; + } + if (SAS_ADDR(sas_addr) != 0) { + if (SAS_ADDR(rri_resp+16) == SAS_ADDR(sas_addr)) { + *index = i; + if ((rri_resp[12] & 0x80) == 0x80) + *present = 0; + else + *present = 1; + goto out; + } else if (SAS_ADDR(rri_resp+16) == 0) { + *index = i; + *present = 0; + goto out; + } + } else if (SAS_ADDR(rri_resp+16) == 0 && + phy->last_da_index < i) { + phy->last_da_index = i; + *index = i; + *present = 0; + goto out; + } + } + res = -1; +out: + kfree(rri_req); + kfree(rri_resp); + return res; +} + +#define CRI_REQ_SIZE 44 +#define CRI_RESP_SIZE 8 + +static int sas_configure_set(struct domain_device *dev, int phy_id, + u8 *sas_addr, int index, int include) +{ + int res; + u8 *cri_req; + u8 *cri_resp; + + cri_req = alloc_smp_req(CRI_REQ_SIZE); + if (!cri_req) + return -ENOMEM; + + cri_resp = alloc_smp_resp(CRI_RESP_SIZE); + if (!cri_resp) { + kfree(cri_req); + return -ENOMEM; + } + + cri_req[1] = SMP_CONF_ROUTE_INFO; + *(__be16 *)(cri_req+6) = cpu_to_be16(index); + cri_req[9] = phy_id; + if (SAS_ADDR(sas_addr) == 0 || !include) + cri_req[12] |= 0x80; + memcpy(cri_req+16, sas_addr, SAS_ADDR_SIZE); + + res = smp_execute_task(dev, cri_req, CRI_REQ_SIZE, cri_resp, + CRI_RESP_SIZE); + if (res) + goto out; + res = cri_resp[2]; + if (res == SMP_RESP_NO_INDEX) { + SAS_DPRINTK("overflow of indexes: dev %016llx phy 0x%x " + "index 0x%x\n", + SAS_ADDR(dev->sas_addr), phy_id, index); + } +out: + kfree(cri_req); + kfree(cri_resp); + return res; +} + +static int sas_configure_phy(struct domain_device *dev, int phy_id, + u8 *sas_addr, int include) +{ + int index; + int present; + int res; + + res = sas_configure_present(dev, phy_id, sas_addr, &index, &present); + if (res) + return res; + if (include ^ present) + return sas_configure_set(dev, phy_id, sas_addr, index,include); + + return res; +} + +/** + * sas_configure_parent -- configure routing table of parent + * parent: parent expander + * child: child expander + * sas_addr: SAS port identifier of device directly attached to child + */ +static int sas_configure_parent(struct domain_device *parent, + struct domain_device *child, + u8 *sas_addr, int include) +{ + struct expander_device *ex_parent = &parent->ex_dev; + int res = 0; + int i; + + if (parent->parent) { + res = sas_configure_parent(parent->parent, parent, sas_addr, + include); + if (res) + return res; + } + + if (ex_parent->conf_route_table == 0) { + SAS_DPRINTK("ex %016llx has self-configuring routing table\n", + SAS_ADDR(parent->sas_addr)); + return 0; + } + + for (i = 0; i < ex_parent->num_phys; i++) { + struct ex_phy *phy = &ex_parent->ex_phy[i]; + + if ((phy->routing_attr == TABLE_ROUTING) && + (SAS_ADDR(phy->attached_sas_addr) == + SAS_ADDR(child->sas_addr))) { + res = sas_configure_phy(parent, i, sas_addr, include); + if (res) + return res; + } + } + + return res; +} + +/** + * sas_configure_routing -- configure routing + * dev: expander device + * sas_addr: port identifier of device directly attached to the expander device + */ +static int sas_configure_routing(struct domain_device *dev, u8 *sas_addr) +{ + if (dev->parent) + return sas_configure_parent(dev->parent, dev, sas_addr, 1); + return 0; +} + +static int sas_disable_routing(struct domain_device *dev, u8 *sas_addr) +{ + if (dev->parent) + return sas_configure_parent(dev->parent, dev, sas_addr, 0); + return 0; +} + +#if 0 +#define SMP_BIN_ATTR_NAME "smp_portal" + +static void sas_ex_smp_hook(struct domain_device *dev) +{ + struct expander_device *ex_dev = &dev->ex_dev; + struct bin_attribute *bin_attr = &ex_dev->smp_bin_attr; + + memset(bin_attr, 0, sizeof(*bin_attr)); + + bin_attr->attr.name = SMP_BIN_ATTR_NAME; + bin_attr->attr.owner = THIS_MODULE; + bin_attr->attr.mode = 0600; + + bin_attr->size = 0; + bin_attr->private = NULL; + bin_attr->read = smp_portal_read; + bin_attr->write= smp_portal_write; + bin_attr->mmap = NULL; + + ex_dev->smp_portal_pid = -1; + init_MUTEX(&ex_dev->smp_sema); +} +#endif + +/** + * sas_discover_expander -- expander discovery + * @ex: pointer to expander domain device + * + * See comment in sas_discover_sata(). + */ +static int sas_discover_expander(struct domain_device *dev) +{ + int res; + + res = sas_notify_lldd_dev_found(dev); + if (res) + return res; + + res = sas_ex_general(dev); + if (res) + goto out_err; + res = sas_ex_manuf_info(dev); + if (res) + goto out_err; + + res = sas_expander_discover(dev); + if (res) { + SAS_DPRINTK("expander %016llx discovery failed(0x%x)\n", + SAS_ADDR(dev->sas_addr), res); + goto out_err; + } + + sas_check_ex_subtractive_boundary(dev); + res = sas_check_parent_topology(dev); + if (res) + goto out_err; + return 0; +out_err: + sas_notify_lldd_dev_gone(dev); + return res; +} + +static int sas_ex_level_discovery(struct asd_sas_port *port, const int level) +{ + int res = 0; + struct domain_device *dev; + + list_for_each_entry(dev, &port->dev_list, dev_list_node) { + if (dev->dev_type == EDGE_DEV || + dev->dev_type == FANOUT_DEV) { + struct sas_expander_device *ex = + rphy_to_expander_device(dev->rphy); + + if (level == ex->level) + res = sas_ex_discover_devices(dev, -1); + else if (level > 0) + res = sas_ex_discover_devices(port->port_dev, -1); + + } + } + + return res; +} + +static int sas_ex_bfs_disc(struct asd_sas_port *port) +{ + int res; + int level; + + do { + level = port->disc.max_level; + res = sas_ex_level_discovery(port, level); + mb(); + } while (level < port->disc.max_level); + + return res; +} + +int sas_discover_root_expander(struct domain_device *dev) +{ + int res; + struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy); + + sas_rphy_add(dev->rphy); + + ex->level = dev->port->disc.max_level; /* 0 */ + res = sas_discover_expander(dev); + if (!res) + sas_ex_bfs_disc(dev->port); + + return res; +} + +/* ---------- Domain revalidation ---------- */ + +static int sas_get_phy_discover(struct domain_device *dev, + int phy_id, struct smp_resp *disc_resp) +{ + int res; + u8 *disc_req; + + disc_req = alloc_smp_req(DISCOVER_REQ_SIZE); + if (!disc_req) + return -ENOMEM; + + disc_req[1] = SMP_DISCOVER; + disc_req[9] = phy_id; + + res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE, + disc_resp, DISCOVER_RESP_SIZE); + if (res) + goto out; + else if (disc_resp->result != SMP_RESP_FUNC_ACC) { + res = disc_resp->result; + goto out; + } +out: + kfree(disc_req); + return res; +} + +static int sas_get_phy_change_count(struct domain_device *dev, + int phy_id, int *pcc) +{ + int res; + struct smp_resp *disc_resp; + + disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE); + if (!disc_resp) + return -ENOMEM; + + res = sas_get_phy_discover(dev, phy_id, disc_resp); + if (!res) + *pcc = disc_resp->disc.change_count; + + kfree(disc_resp); + return res; +} + +static int sas_get_phy_attached_sas_addr(struct domain_device *dev, + int phy_id, u8 *attached_sas_addr) +{ + int res; + struct smp_resp *disc_resp; + struct discover_resp *dr; + + disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE); + if (!disc_resp) + return -ENOMEM; + dr = &disc_resp->disc; + + res = sas_get_phy_discover(dev, phy_id, disc_resp); + if (!res) { + memcpy(attached_sas_addr,disc_resp->disc.attached_sas_addr,8); + if (dr->attached_dev_type == 0) + memset(attached_sas_addr, 0, 8); + } + kfree(disc_resp); + return res; +} + +static int sas_find_bcast_phy(struct domain_device *dev, int *phy_id, + int from_phy) +{ + struct expander_device *ex = &dev->ex_dev; + int res = 0; + int i; + + for (i = from_phy; i < ex->num_phys; i++) { + int phy_change_count = 0; + + res = sas_get_phy_change_count(dev, i, &phy_change_count); + if (res) + goto out; + else if (phy_change_count != ex->ex_phy[i].phy_change_count) { + ex->ex_phy[i].phy_change_count = phy_change_count; + *phy_id = i; + return 0; + } + } +out: + return res; +} + +static int sas_get_ex_change_count(struct domain_device *dev, int *ecc) +{ + int res; + u8 *rg_req; + struct smp_resp *rg_resp; + + rg_req = alloc_smp_req(RG_REQ_SIZE); + if (!rg_req) + return -ENOMEM; + + rg_resp = alloc_smp_resp(RG_RESP_SIZE); + if (!rg_resp) { + kfree(rg_req); + return -ENOMEM; + } + + rg_req[1] = SMP_REPORT_GENERAL; + + res = smp_execute_task(dev, rg_req, RG_REQ_SIZE, rg_resp, + RG_RESP_SIZE); + if (res) + goto out; + if (rg_resp->result != SMP_RESP_FUNC_ACC) { + res = rg_resp->result; + goto out; + } + + *ecc = be16_to_cpu(rg_resp->rg.change_count); +out: + kfree(rg_resp); + kfree(rg_req); + return res; +} + +static int sas_find_bcast_dev(struct domain_device *dev, + struct domain_device **src_dev) +{ + struct expander_device *ex = &dev->ex_dev; + int ex_change_count = -1; + int res; + + res = sas_get_ex_change_count(dev, &ex_change_count); + if (res) + goto out; + if (ex_change_count != -1 && + ex_change_count != ex->ex_change_count) { + *src_dev = dev; + ex->ex_change_count = ex_change_count; + } else { + struct domain_device *ch; + + list_for_each_entry(ch, &ex->children, siblings) { + if (ch->dev_type == EDGE_DEV || + ch->dev_type == FANOUT_DEV) { + res = sas_find_bcast_dev(ch, src_dev); + if (src_dev) + return res; + } + } + } +out: + return res; +} + +static void sas_unregister_ex_tree(struct domain_device *dev) +{ + struct expander_device *ex = &dev->ex_dev; + struct domain_device *child, *n; + + list_for_each_entry_safe(child, n, &ex->children, siblings) { + if (child->dev_type == EDGE_DEV || + child->dev_type == FANOUT_DEV) + sas_unregister_ex_tree(child); + else + sas_unregister_dev(child); + } + sas_unregister_dev(dev); +} + +static void sas_unregister_devs_sas_addr(struct domain_device *parent, + int phy_id) +{ + struct expander_device *ex_dev = &parent->ex_dev; + struct ex_phy *phy = &ex_dev->ex_phy[phy_id]; + struct domain_device *child, *n; + + list_for_each_entry_safe(child, n, &ex_dev->children, siblings) { + if (SAS_ADDR(child->sas_addr) == + SAS_ADDR(phy->attached_sas_addr)) { + if (child->dev_type == EDGE_DEV || + child->dev_type == FANOUT_DEV) + sas_unregister_ex_tree(child); + else + sas_unregister_dev(child); + break; + } + } + sas_disable_routing(parent, phy->attached_sas_addr); + memset(phy->attached_sas_addr, 0, SAS_ADDR_SIZE); + sas_port_delete_phy(phy->port, phy->phy); + if (phy->port->num_phys == 0) + sas_port_delete(phy->port); + phy->port = NULL; +} + +static int sas_discover_bfs_by_root_level(struct domain_device *root, + const int level) +{ + struct expander_device *ex_root = &root->ex_dev; + struct domain_device *child; + int res = 0; + + list_for_each_entry(child, &ex_root->children, siblings) { + if (child->dev_type == EDGE_DEV || + child->dev_type == FANOUT_DEV) { + struct sas_expander_device *ex = + rphy_to_expander_device(child->rphy); + + if (level > ex->level) + res = sas_discover_bfs_by_root_level(child, + level); + else if (level == ex->level) + res = sas_ex_discover_devices(child, -1); + } + } + return res; +} + +static int sas_discover_bfs_by_root(struct domain_device *dev) +{ + int res; + struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy); + int level = ex->level+1; + + res = sas_ex_discover_devices(dev, -1); + if (res) + goto out; + do { + res = sas_discover_bfs_by_root_level(dev, level); + mb(); + level += 1; + } while (level <= dev->port->disc.max_level); +out: + return res; +} + +static int sas_discover_new(struct domain_device *dev, int phy_id) +{ + struct ex_phy *ex_phy = &dev->ex_dev.ex_phy[phy_id]; + struct domain_device *child; + int res; + + SAS_DPRINTK("ex %016llx phy%d new device attached\n", + SAS_ADDR(dev->sas_addr), phy_id); + res = sas_ex_phy_discover(dev, phy_id); + if (res) + goto out; + res = sas_ex_discover_devices(dev, phy_id); + if (res) + goto out; + list_for_each_entry(child, &dev->ex_dev.children, siblings) { + if (SAS_ADDR(child->sas_addr) == + SAS_ADDR(ex_phy->attached_sas_addr)) { + if (child->dev_type == EDGE_DEV || + child->dev_type == FANOUT_DEV) + res = sas_discover_bfs_by_root(child); + break; + } + } +out: + return res; +} + +static int sas_rediscover_dev(struct domain_device *dev, int phy_id) +{ + struct expander_device *ex = &dev->ex_dev; + struct ex_phy *phy = &ex->ex_phy[phy_id]; + u8 attached_sas_addr[8]; + int res; + + res = sas_get_phy_attached_sas_addr(dev, phy_id, attached_sas_addr); + switch (res) { + case SMP_RESP_NO_PHY: + phy->phy_state = PHY_NOT_PRESENT; + sas_unregister_devs_sas_addr(dev, phy_id); + goto out; break; + case SMP_RESP_PHY_VACANT: + phy->phy_state = PHY_VACANT; + sas_unregister_devs_sas_addr(dev, phy_id); + goto out; break; + case SMP_RESP_FUNC_ACC: + break; + } + + if (SAS_ADDR(attached_sas_addr) == 0) { + phy->phy_state = PHY_EMPTY; + sas_unregister_devs_sas_addr(dev, phy_id); + } else if (SAS_ADDR(attached_sas_addr) == + SAS_ADDR(phy->attached_sas_addr)) { + SAS_DPRINTK("ex %016llx phy 0x%x broadcast flutter\n", + SAS_ADDR(dev->sas_addr), phy_id); + } else + res = sas_discover_new(dev, phy_id); +out: + return res; +} + +static int sas_rediscover(struct domain_device *dev, const int phy_id) +{ + struct expander_device *ex = &dev->ex_dev; + struct ex_phy *changed_phy = &ex->ex_phy[phy_id]; + int res = 0; + int i; + + SAS_DPRINTK("ex %016llx phy%d originated BROADCAST(CHANGE)\n", + SAS_ADDR(dev->sas_addr), phy_id); + + if (SAS_ADDR(changed_phy->attached_sas_addr) != 0) { + for (i = 0; i < ex->num_phys; i++) { + struct ex_phy *phy = &ex->ex_phy[i]; + + if (i == phy_id) + continue; + if (SAS_ADDR(phy->attached_sas_addr) == + SAS_ADDR(changed_phy->attached_sas_addr)) { + SAS_DPRINTK("phy%d part of wide port with " + "phy%d\n", phy_id, i); + goto out; + } + } + res = sas_rediscover_dev(dev, phy_id); + } else + res = sas_discover_new(dev, phy_id); +out: + return res; +} + +/** + * sas_revalidate_domain -- revalidate the domain + * @port: port to the domain of interest + * + * NOTE: this process _must_ quit (return) as soon as any connection + * errors are encountered. Connection recovery is done elsewhere. + * Discover process only interrogates devices in order to discover the + * domain. + */ +int sas_ex_revalidate_domain(struct domain_device *port_dev) +{ + int res; + struct domain_device *dev = NULL; + + res = sas_find_bcast_dev(port_dev, &dev); + if (res) + goto out; + if (dev) { + struct expander_device *ex = &dev->ex_dev; + int i = 0, phy_id; + + do { + phy_id = -1; + res = sas_find_bcast_phy(dev, &phy_id, i); + if (phy_id == -1) + break; + res = sas_rediscover(dev, phy_id); + i = phy_id + 1; + } while (i < ex->num_phys); + } +out: + return res; +} + +#if 0 +/* ---------- SMP portal ---------- */ + +static ssize_t smp_portal_write(struct kobject *kobj, char *buf, loff_t offs, + size_t size) +{ + struct domain_device *dev = to_dom_device(kobj); + struct expander_device *ex = &dev->ex_dev; + + if (offs != 0) + return -EFBIG; + else if (size == 0) + return 0; + + down_interruptible(&ex->smp_sema); + if (ex->smp_req) + kfree(ex->smp_req); + ex->smp_req = kzalloc(size, GFP_USER); + if (!ex->smp_req) { + up(&ex->smp_sema); + return -ENOMEM; + } + memcpy(ex->smp_req, buf, size); + ex->smp_req_size = size; + ex->smp_portal_pid = current->pid; + up(&ex->smp_sema); + + return size; +} + +static ssize_t smp_portal_read(struct kobject *kobj, char *buf, loff_t offs, + size_t size) +{ + struct domain_device *dev = to_dom_device(kobj); + struct expander_device *ex = &dev->ex_dev; + u8 *smp_resp; + int res = -EINVAL; + + /* XXX: sysfs gives us an offset of 0x10 or 0x8 while in fact + * it should be 0. + */ + + down_interruptible(&ex->smp_sema); + if (!ex->smp_req || ex->smp_portal_pid != current->pid) + goto out; + + res = 0; + if (size == 0) + goto out; + + res = -ENOMEM; + smp_resp = alloc_smp_resp(size); + if (!smp_resp) + goto out; + res = smp_execute_task(dev, ex->smp_req, ex->smp_req_size, + smp_resp, size); + if (!res) { + memcpy(buf, smp_resp, size); + res = size; + } + + kfree(smp_resp); +out: + kfree(ex->smp_req); + ex->smp_req = NULL; + ex->smp_req_size = 0; + ex->smp_portal_pid = -1; + up(&ex->smp_sema); + return res; +} +#endif -- cgit v1.2.3 From 88edf74610bd894b93438f389688bc8b4a2d3414 Mon Sep 17 00:00:00 2001 From: James Bottomley Date: Wed, 6 Sep 2006 17:36:13 -0500 Subject: [SCSI] SAS: consolidate linkspeed definitions At the moment we have two separate linkspeed enumerations covering roughly the same values. This patch consolidates on a single one enum sas_linkspeed in scsi_transport_sas.h and uses it everywhere in the aic94xx driver. Eventually I'll get around to removing the duplicated fields in asd_sas_phy and sas_phy ... Signed-off-by: James Bottomley --- drivers/scsi/aic94xx/aic94xx_hwi.c | 2 +- drivers/scsi/aic94xx/aic94xx_init.c | 12 ++++++++---- drivers/scsi/aic94xx/aic94xx_scb.c | 26 +++++++++++++------------- drivers/scsi/libsas/sas_expander.c | 27 +++++++-------------------- drivers/scsi/libsas/sas_internal.h | 2 +- include/scsi/libsas.h | 14 +++++++------- include/scsi/sas.h | 14 -------------- include/scsi/scsi_transport_sas.h | 26 +++++++++++++++++--------- 8 files changed, 54 insertions(+), 69 deletions(-) (limited to 'drivers/scsi/libsas/sas_expander.c') diff --git a/drivers/scsi/aic94xx/aic94xx_hwi.c b/drivers/scsi/aic94xx/aic94xx_hwi.c index 075cea85b56b..a24201351108 100644 --- a/drivers/scsi/aic94xx/aic94xx_hwi.c +++ b/drivers/scsi/aic94xx/aic94xx_hwi.c @@ -96,7 +96,7 @@ static int asd_init_phy(struct asd_phy *phy) sas_phy->type = PHY_TYPE_PHYSICAL; sas_phy->role = PHY_ROLE_INITIATOR; sas_phy->oob_mode = OOB_NOT_CONNECTED; - sas_phy->linkrate = PHY_LINKRATE_NONE; + sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN; phy->id_frm_tok = asd_alloc_coherent(asd_ha, sizeof(*phy->identify_frame), diff --git a/drivers/scsi/aic94xx/aic94xx_init.c b/drivers/scsi/aic94xx/aic94xx_init.c index 69aa70887530..302b54fddf3c 100644 --- a/drivers/scsi/aic94xx/aic94xx_init.c +++ b/drivers/scsi/aic94xx/aic94xx_init.c @@ -240,10 +240,14 @@ static int __devinit asd_common_setup(struct asd_ha_struct *asd_ha) /* All phys are enabled, by default. */ asd_ha->hw_prof.enabled_phys = 0xFF; for (i = 0; i < ASD_MAX_PHYS; i++) { - asd_ha->hw_prof.phy_desc[i].max_sas_lrate = PHY_LINKRATE_3; - asd_ha->hw_prof.phy_desc[i].min_sas_lrate = PHY_LINKRATE_1_5; - asd_ha->hw_prof.phy_desc[i].max_sata_lrate= PHY_LINKRATE_1_5; - asd_ha->hw_prof.phy_desc[i].min_sata_lrate= PHY_LINKRATE_1_5; + asd_ha->hw_prof.phy_desc[i].max_sas_lrate = + SAS_LINK_RATE_3_0_GBPS; + asd_ha->hw_prof.phy_desc[i].min_sas_lrate = + SAS_LINK_RATE_1_5_GBPS; + asd_ha->hw_prof.phy_desc[i].max_sata_lrate = + SAS_LINK_RATE_1_5_GBPS; + asd_ha->hw_prof.phy_desc[i].min_sata_lrate = + SAS_LINK_RATE_1_5_GBPS; } return 0; diff --git a/drivers/scsi/aic94xx/aic94xx_scb.c b/drivers/scsi/aic94xx/aic94xx_scb.c index fc1b7438a913..ef8ca08b545f 100644 --- a/drivers/scsi/aic94xx/aic94xx_scb.c +++ b/drivers/scsi/aic94xx/aic94xx_scb.c @@ -55,15 +55,15 @@ static inline void get_lrate_mode(struct asd_phy *phy, u8 oob_mode) switch (oob_mode & 7) { case PHY_SPEED_60: /* FIXME: sas transport class doesn't have this */ - phy->sas_phy.linkrate = PHY_LINKRATE_6; + phy->sas_phy.linkrate = SAS_LINK_RATE_6_0_GBPS; phy->sas_phy.phy->negotiated_linkrate = SAS_LINK_RATE_6_0_GBPS; break; case PHY_SPEED_30: - phy->sas_phy.linkrate = PHY_LINKRATE_3; + phy->sas_phy.linkrate = SAS_LINK_RATE_3_0_GBPS; phy->sas_phy.phy->negotiated_linkrate = SAS_LINK_RATE_3_0_GBPS; break; case PHY_SPEED_15: - phy->sas_phy.linkrate = PHY_LINKRATE_1_5; + phy->sas_phy.linkrate = SAS_LINK_RATE_1_5_GBPS; phy->sas_phy.phy->negotiated_linkrate = SAS_LINK_RATE_1_5_GBPS; break; } @@ -540,39 +540,39 @@ static inline void set_speed_mask(u8 *speed_mask, struct asd_phy_desc *pd) | SATA_SPEED_30_DIS | SATA_SPEED_15_DIS; switch (pd->max_sas_lrate) { - case PHY_LINKRATE_6: + case SAS_LINK_RATE_6_0_GBPS: *speed_mask &= ~SAS_SPEED_60_DIS; default: - case PHY_LINKRATE_3: + case SAS_LINK_RATE_3_0_GBPS: *speed_mask &= ~SAS_SPEED_30_DIS; - case PHY_LINKRATE_1_5: + case SAS_LINK_RATE_1_5_GBPS: *speed_mask &= ~SAS_SPEED_15_DIS; } switch (pd->min_sas_lrate) { - case PHY_LINKRATE_6: + case SAS_LINK_RATE_6_0_GBPS: *speed_mask |= SAS_SPEED_30_DIS; - case PHY_LINKRATE_3: + case SAS_LINK_RATE_3_0_GBPS: *speed_mask |= SAS_SPEED_15_DIS; default: - case PHY_LINKRATE_1_5: + case SAS_LINK_RATE_1_5_GBPS: /* nothing to do */ ; } switch (pd->max_sata_lrate) { - case PHY_LINKRATE_3: + case SAS_LINK_RATE_3_0_GBPS: *speed_mask &= ~SATA_SPEED_30_DIS; default: - case PHY_LINKRATE_1_5: + case SAS_LINK_RATE_1_5_GBPS: *speed_mask &= ~SATA_SPEED_15_DIS; } switch (pd->min_sata_lrate) { - case PHY_LINKRATE_3: + case SAS_LINK_RATE_3_0_GBPS: *speed_mask |= SATA_SPEED_15_DIS; default: - case PHY_LINKRATE_1_5: + case SAS_LINK_RATE_1_5_GBPS: /* nothing to do */ ; } diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c index b653a263f76a..02e796ee027e 100644 --- a/drivers/scsi/libsas/sas_expander.c +++ b/drivers/scsi/libsas/sas_expander.c @@ -191,20 +191,7 @@ static void sas_set_ex_phy(struct domain_device *dev, int phy_id, phy->phy->maximum_linkrate_hw = SAS_LINK_RATE_3_0_GBPS; phy->phy->minimum_linkrate = SAS_LINK_RATE_1_5_GBPS; phy->phy->maximum_linkrate = SAS_LINK_RATE_3_0_GBPS; - switch (phy->linkrate) { - case PHY_LINKRATE_1_5: - phy->phy->negotiated_linkrate = SAS_LINK_RATE_1_5_GBPS; - break; - case PHY_LINKRATE_3: - phy->phy->negotiated_linkrate = SAS_LINK_RATE_3_0_GBPS; - break; - case PHY_LINKRATE_6: - phy->phy->negotiated_linkrate = SAS_LINK_RATE_6_0_GBPS; - break; - default: - phy->phy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN; - break; - } + phy->phy->negotiated_linkrate = phy->linkrate; if (!rediscover) sas_phy_add(phy->phy); @@ -450,7 +437,7 @@ static void sas_ex_disable_phy(struct domain_device *dev, int phy_id) struct ex_phy *phy = &ex->ex_phy[phy_id]; sas_smp_phy_control(dev, phy_id, PHY_FUNC_DISABLE); - phy->linkrate = PHY_DISABLED; + phy->linkrate = SAS_PHY_DISABLED; } static void sas_ex_disable_port(struct domain_device *dev, u8 *sas_addr) @@ -743,7 +730,7 @@ static int sas_ex_discover_dev(struct domain_device *dev, int phy_id) int res = 0; /* Phy state */ - if (ex_phy->linkrate == PHY_SPINUP_HOLD) { + if (ex_phy->linkrate == SAS_SATA_SPINUP_HOLD) { if (!sas_smp_phy_control(dev, phy_id, PHY_FUNC_LINK_RESET)) res = sas_ex_phy_discover(dev, phy_id); if (res) @@ -773,7 +760,7 @@ static int sas_ex_discover_dev(struct domain_device *dev, int phy_id) sas_configure_routing(dev, ex_phy->attached_sas_addr); } return 0; - } else if (ex_phy->linkrate == PHY_LINKRATE_UNKNOWN) + } else if (ex_phy->linkrate == SAS_LINK_RATE_UNKNOWN) return 0; if (ex_phy->attached_dev_type != SAS_END_DEV && @@ -922,9 +909,9 @@ static int sas_ex_discover_devices(struct domain_device *dev, int single) continue; switch (ex_phy->linkrate) { - case PHY_DISABLED: - case PHY_RESET_PROBLEM: - case PHY_PORT_SELECTOR: + case SAS_PHY_DISABLED: + case SAS_PHY_RESET_PROBLEM: + case SAS_SATA_PORT_SELECTOR: continue; default: res = sas_ex_discover_dev(dev, i); diff --git a/drivers/scsi/libsas/sas_internal.h b/drivers/scsi/libsas/sas_internal.h index 89c397680846..0d69ede4b944 100644 --- a/drivers/scsi/libsas/sas_internal.h +++ b/drivers/scsi/libsas/sas_internal.h @@ -43,7 +43,7 @@ void sas_scsi_recover_host(struct Scsi_Host *shost); int sas_show_class(enum sas_class class, char *buf); int sas_show_proto(enum sas_proto proto, char *buf); -int sas_show_linkrate(enum sas_phy_linkrate linkrate, char *buf); +int sas_show_linkrate(enum sas_linkrate linkrate, char *buf); int sas_show_oob_mode(enum sas_oob_mode oob_mode, char *buf); int sas_register_phys(struct sas_ha_struct *sas_ha); diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h index 72acdabe7f80..8d91313dd888 100644 --- a/include/scsi/libsas.h +++ b/include/scsi/libsas.h @@ -114,7 +114,7 @@ struct ex_phy { enum ex_phy_state phy_state; enum sas_dev_type attached_dev_type; - enum sas_phy_linkrate linkrate; + enum sas_linkrate linkrate; u8 attached_sata_host:1; u8 attached_sata_dev:1; @@ -170,9 +170,9 @@ struct sata_device { struct domain_device { enum sas_dev_type dev_type; - enum sas_phy_linkrate linkrate; - enum sas_phy_linkrate min_linkrate; - enum sas_phy_linkrate max_linkrate; + enum sas_linkrate linkrate; + enum sas_linkrate min_linkrate; + enum sas_linkrate max_linkrate; int pathways; @@ -220,7 +220,7 @@ struct asd_sas_port { struct domain_device *port_dev; spinlock_t dev_list_lock; struct list_head dev_list; - enum sas_phy_linkrate linkrate; + enum sas_linkrate linkrate; struct sas_phy *phy; struct work_struct work; @@ -276,7 +276,7 @@ struct asd_sas_phy { enum sas_phy_type type; enum sas_phy_role role; enum sas_oob_mode oob_mode; - enum sas_phy_linkrate linkrate; + enum sas_linkrate linkrate; u8 *sas_addr; /* must be set */ u8 attached_sas_addr[SAS_ADDR_SIZE]; /* class:RO, driver: R/W */ @@ -368,7 +368,7 @@ void sas_hash_addr(u8 *hashed, const u8 *sas_addr); static inline void sas_phy_disconnected(struct asd_sas_phy *phy) { phy->oob_mode = OOB_NOT_CONNECTED; - phy->linkrate = PHY_LINKRATE_NONE; + phy->linkrate = SAS_LINK_RATE_UNKNOWN; } /* ---------- Tasks ---------- */ diff --git a/include/scsi/sas.h b/include/scsi/sas.h index 752853a113dc..9c8a5b91ae64 100644 --- a/include/scsi/sas.h +++ b/include/scsi/sas.h @@ -102,20 +102,6 @@ enum sas_dev_type { SATA_PM_PORT= 8, }; -enum sas_phy_linkrate { - PHY_LINKRATE_NONE = 0, - PHY_LINKRATE_UNKNOWN = 0, - PHY_DISABLED, - PHY_RESET_PROBLEM, - PHY_SPINUP_HOLD, - PHY_PORT_SELECTOR, - PHY_LINKRATE_1_5 = 0x08, - PHY_LINKRATE_G1 = PHY_LINKRATE_1_5, - PHY_LINKRATE_3 = 0x09, - PHY_LINKRATE_G2 = PHY_LINKRATE_3, - PHY_LINKRATE_6 = 0x0A, -}; - /* Partly from IDENTIFY address frame. */ enum sas_proto { SATA_PROTO = 1, diff --git a/include/scsi/scsi_transport_sas.h b/include/scsi/scsi_transport_sas.h index eeb2200de855..87de518960c1 100644 --- a/include/scsi/scsi_transport_sas.h +++ b/include/scsi/scsi_transport_sas.h @@ -24,15 +24,23 @@ enum sas_protocol { }; enum sas_linkrate { - SAS_LINK_RATE_UNKNOWN, - SAS_PHY_DISABLED, - SAS_LINK_RATE_FAILED, - SAS_SATA_SPINUP_HOLD, - SAS_SATA_PORT_SELECTOR, - SAS_LINK_RATE_1_5_GBPS, - SAS_LINK_RATE_3_0_GBPS, - SAS_LINK_RATE_6_0_GBPS, - SAS_LINK_VIRTUAL, + /* These Values are defined in the SAS standard */ + SAS_LINK_RATE_UNKNOWN = 0, + SAS_PHY_DISABLED = 1, + SAS_PHY_RESET_PROBLEM = 2, + SAS_SATA_SPINUP_HOLD = 3, + SAS_SATA_PORT_SELECTOR = 4, + SAS_PHY_RESET_IN_PROGRESS = 5, + SAS_LINK_RATE_1_5_GBPS = 8, + SAS_LINK_RATE_G1 = SAS_LINK_RATE_1_5_GBPS, + SAS_LINK_RATE_3_0_GBPS = 9, + SAS_LINK_RATE_G2 = SAS_LINK_RATE_3_0_GBPS, + SAS_LINK_RATE_6_0_GBPS = 10, + /* These are virtual to the transport class and may never + * be signalled normally since the standard defined field + * is only 4 bits */ + SAS_LINK_RATE_FAILED = 0x10, + SAS_PHY_VIRTUAL = 0x11, }; struct sas_identify { -- cgit v1.2.3 From a01e70e570a72b8a8c9a58062e4f5bdcd3986222 Mon Sep 17 00:00:00 2001 From: James Bottomley Date: Wed, 6 Sep 2006 19:28:07 -0500 Subject: [SCSI] aci94xx: implement link rate setting This patch implements the ability to set the minimum and maximum linkrates for both libsas (for expanders) and aic94xx (for the host phys). It also tidies up the setting of the hardware min and max to make sure they're updated when the expander emits a change broadcast. Signed-off-by: James Bottomley --- drivers/scsi/aic94xx/aic94xx.h | 2 +- drivers/scsi/aic94xx/aic94xx_scb.c | 30 ++++++++++++++++++++++++-- drivers/scsi/libsas/sas_expander.c | 20 +++++++++++------ drivers/scsi/libsas/sas_init.c | 44 ++++++++++++++++++++++++++++++++++++-- drivers/scsi/libsas/sas_internal.h | 2 +- drivers/scsi/libsas/sas_phy.c | 15 +++++++------ include/scsi/libsas.h | 2 +- include/scsi/sas.h | 1 + 8 files changed, 95 insertions(+), 21 deletions(-) (limited to 'drivers/scsi/libsas/sas_expander.c') diff --git a/drivers/scsi/aic94xx/aic94xx.h b/drivers/scsi/aic94xx/aic94xx.h index cb7caf1c9ce1..1bd5b4ecf3d5 100644 --- a/drivers/scsi/aic94xx/aic94xx.h +++ b/drivers/scsi/aic94xx/aic94xx.h @@ -109,6 +109,6 @@ int asd_clear_nexus_port(struct asd_sas_port *port); int asd_clear_nexus_ha(struct sas_ha_struct *sas_ha); /* ---------- Phy Management ---------- */ -int asd_control_phy(struct asd_sas_phy *phy, enum phy_func func); +int asd_control_phy(struct asd_sas_phy *phy, enum phy_func func, void *arg); #endif diff --git a/drivers/scsi/aic94xx/aic94xx_scb.c b/drivers/scsi/aic94xx/aic94xx_scb.c index ef8ca08b545f..7ee49b51b724 100644 --- a/drivers/scsi/aic94xx/aic94xx_scb.c +++ b/drivers/scsi/aic94xx/aic94xx_scb.c @@ -52,6 +52,8 @@ static inline void get_lrate_mode(struct asd_phy *phy, u8 oob_mode) { + struct sas_phy *sas_phy = phy->sas_phy.phy; + switch (oob_mode & 7) { case PHY_SPEED_60: /* FIXME: sas transport class doesn't have this */ @@ -67,6 +69,12 @@ static inline void get_lrate_mode(struct asd_phy *phy, u8 oob_mode) phy->sas_phy.phy->negotiated_linkrate = SAS_LINK_RATE_1_5_GBPS; break; } + sas_phy->negotiated_linkrate = phy->sas_phy.linkrate; + sas_phy->maximum_linkrate_hw = SAS_LINK_RATE_3_0_GBPS; + sas_phy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS; + sas_phy->maximum_linkrate = phy->phy_desc->max_sas_lrate; + sas_phy->minimum_linkrate = phy->phy_desc->min_sas_lrate; + if (oob_mode & SAS_MODE) phy->sas_phy.oob_mode = SAS_OOB_MODE; else if (oob_mode & SATA_MODE) @@ -710,14 +718,32 @@ static const int phy_func_table[] = { [PHY_FUNC_RELEASE_SPINUP_HOLD] = RELEASE_SPINUP_HOLD, }; -int asd_control_phy(struct asd_sas_phy *phy, enum phy_func func) +int asd_control_phy(struct asd_sas_phy *phy, enum phy_func func, void *arg) { struct asd_ha_struct *asd_ha = phy->ha->lldd_ha; + struct asd_phy_desc *pd = asd_ha->phys[phy->id].phy_desc; struct asd_ascb *ascb; + struct sas_phy_linkrates *rates; int res = 1; - if (func == PHY_FUNC_CLEAR_ERROR_LOG) + switch (func) { + case PHY_FUNC_CLEAR_ERROR_LOG: return -ENOSYS; + case PHY_FUNC_SET_LINK_RATE: + rates = arg; + if (rates->minimum_linkrate) { + pd->min_sas_lrate = rates->minimum_linkrate; + pd->min_sata_lrate = rates->minimum_linkrate; + } + if (rates->maximum_linkrate) { + pd->max_sas_lrate = rates->maximum_linkrate; + pd->max_sata_lrate = rates->maximum_linkrate; + } + func = PHY_FUNC_LINK_RESET; + break; + default: + break; + } ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL); if (!ascb) diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c index 02e796ee027e..30b8014bcc7a 100644 --- a/drivers/scsi/libsas/sas_expander.c +++ b/drivers/scsi/libsas/sas_expander.c @@ -187,10 +187,10 @@ static void sas_set_ex_phy(struct domain_device *dev, int phy_id, phy->phy->identify.initiator_port_protocols = phy->attached_iproto; phy->phy->identify.target_port_protocols = phy->attached_tproto; phy->phy->identify.phy_identifier = phy_id; - phy->phy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS; - phy->phy->maximum_linkrate_hw = SAS_LINK_RATE_3_0_GBPS; - phy->phy->minimum_linkrate = SAS_LINK_RATE_1_5_GBPS; - phy->phy->maximum_linkrate = SAS_LINK_RATE_3_0_GBPS; + phy->phy->minimum_linkrate_hw = dr->hmin_linkrate; + phy->phy->maximum_linkrate_hw = dr->hmax_linkrate; + phy->phy->minimum_linkrate = dr->pmin_linkrate; + phy->phy->maximum_linkrate = dr->pmax_linkrate; phy->phy->negotiated_linkrate = phy->linkrate; if (!rediscover) @@ -404,7 +404,8 @@ out: #define PC_RESP_SIZE 8 int sas_smp_phy_control(struct domain_device *dev, int phy_id, - enum phy_func phy_func) + enum phy_func phy_func, + struct sas_phy_linkrates *rates) { u8 *pc_req; u8 *pc_resp; @@ -423,6 +424,10 @@ int sas_smp_phy_control(struct domain_device *dev, int phy_id, pc_req[1] = SMP_PHY_CONTROL; pc_req[9] = phy_id; pc_req[10]= phy_func; + if (rates) { + pc_req[32] = rates->minimum_linkrate << 4; + pc_req[33] = rates->maximum_linkrate << 4; + } res = smp_execute_task(dev, pc_req, PC_REQ_SIZE, pc_resp,PC_RESP_SIZE); @@ -436,7 +441,7 @@ static void sas_ex_disable_phy(struct domain_device *dev, int phy_id) struct expander_device *ex = &dev->ex_dev; struct ex_phy *phy = &ex->ex_phy[phy_id]; - sas_smp_phy_control(dev, phy_id, PHY_FUNC_DISABLE); + sas_smp_phy_control(dev, phy_id, PHY_FUNC_DISABLE, NULL); phy->linkrate = SAS_PHY_DISABLED; } @@ -731,7 +736,7 @@ static int sas_ex_discover_dev(struct domain_device *dev, int phy_id) /* Phy state */ if (ex_phy->linkrate == SAS_SATA_SPINUP_HOLD) { - if (!sas_smp_phy_control(dev, phy_id, PHY_FUNC_LINK_RESET)) + if (!sas_smp_phy_control(dev, phy_id, PHY_FUNC_LINK_RESET, NULL)) res = sas_ex_phy_discover(dev, phy_id); if (res) return res; @@ -1706,6 +1711,7 @@ static int sas_rediscover_dev(struct domain_device *dev, int phy_id) SAS_ADDR(phy->attached_sas_addr)) { SAS_DPRINTK("ex %016llx phy 0x%x broadcast flutter\n", SAS_ADDR(dev->sas_addr), phy_id); + sas_ex_phy_discover(dev, phy_id); } else res = sas_discover_new(dev, phy_id); out: diff --git a/drivers/scsi/libsas/sas_init.c b/drivers/scsi/libsas/sas_init.c index b961664b8106..c836a237fb79 100644 --- a/drivers/scsi/libsas/sas_init.c +++ b/drivers/scsi/libsas/sas_init.c @@ -159,17 +159,57 @@ static int sas_phy_reset(struct sas_phy *phy, int hard_reset) struct sas_internal *i = to_sas_internal(sas_ha->core.shost->transportt); - ret = i->dft->lldd_control_phy(asd_phy, reset_type); + ret = i->dft->lldd_control_phy(asd_phy, reset_type, NULL); } else { struct sas_rphy *rphy = dev_to_rphy(phy->dev.parent); struct domain_device *ddev = sas_find_dev_by_rphy(rphy); - ret = sas_smp_phy_control(ddev, phy->number, reset_type); + ret = sas_smp_phy_control(ddev, phy->number, reset_type, NULL); } return ret; } +static int sas_set_phy_speed(struct sas_phy *phy, + struct sas_phy_linkrates *rates) +{ + int ret; + + if ((rates->minimum_linkrate && + rates->minimum_linkrate > phy->maximum_linkrate) || + (rates->maximum_linkrate && + rates->maximum_linkrate < phy->minimum_linkrate)) + return -EINVAL; + + if (rates->minimum_linkrate && + rates->minimum_linkrate < phy->minimum_linkrate_hw) + rates->minimum_linkrate = phy->minimum_linkrate_hw; + + if (rates->maximum_linkrate && + rates->maximum_linkrate > phy->maximum_linkrate_hw) + rates->maximum_linkrate = phy->maximum_linkrate_hw; + + if (scsi_is_sas_phy_local(phy)) { + struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); + struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost); + struct asd_sas_phy *asd_phy = sas_ha->sas_phy[phy->number]; + struct sas_internal *i = + to_sas_internal(sas_ha->core.shost->transportt); + + ret = i->dft->lldd_control_phy(asd_phy, PHY_FUNC_SET_LINK_RATE, + rates); + } else { + struct sas_rphy *rphy = dev_to_rphy(phy->dev.parent); + struct domain_device *ddev = sas_find_dev_by_rphy(rphy); + ret = sas_smp_phy_control(ddev, phy->number, + PHY_FUNC_LINK_RESET, rates); + + } + + return ret; +} + static struct sas_function_template sft = { .phy_reset = sas_phy_reset, + .set_phy_speed = sas_set_phy_speed, .get_linkerrors = sas_get_linkerrors, }; diff --git a/drivers/scsi/libsas/sas_internal.h b/drivers/scsi/libsas/sas_internal.h index 0d69ede4b944..bffcee474921 100644 --- a/drivers/scsi/libsas/sas_internal.h +++ b/drivers/scsi/libsas/sas_internal.h @@ -70,7 +70,7 @@ int sas_notify_lldd_dev_found(struct domain_device *); void sas_notify_lldd_dev_gone(struct domain_device *); int sas_smp_phy_control(struct domain_device *dev, int phy_id, - enum phy_func phy_func); + enum phy_func phy_func, struct sas_phy_linkrates *); int sas_smp_get_phy_events(struct sas_phy *phy); struct domain_device *sas_find_dev_by_rphy(struct sas_rphy *rphy); diff --git a/drivers/scsi/libsas/sas_phy.c b/drivers/scsi/libsas/sas_phy.c index 024ab00e70d2..9340cdbae4a3 100644 --- a/drivers/scsi/libsas/sas_phy.c +++ b/drivers/scsi/libsas/sas_phy.c @@ -67,13 +67,14 @@ static void sas_phye_oob_error(void *data) switch (phy->error) { case 1: case 2: - i->dft->lldd_control_phy(phy, PHY_FUNC_HARD_RESET); + i->dft->lldd_control_phy(phy, PHY_FUNC_HARD_RESET, + NULL); break; case 3: default: phy->error = 0; phy->enabled = 0; - i->dft->lldd_control_phy(phy, PHY_FUNC_DISABLE); + i->dft->lldd_control_phy(phy, PHY_FUNC_DISABLE, NULL); break; } } @@ -90,7 +91,7 @@ static void sas_phye_spinup_hold(void *data) &phy->phy_events_pending); phy->error = 0; - i->dft->lldd_control_phy(phy, PHY_FUNC_RELEASE_SPINUP_HOLD); + i->dft->lldd_control_phy(phy, PHY_FUNC_RELEASE_SPINUP_HOLD, NULL); } /* ---------- Phy class registration ---------- */ @@ -144,10 +145,10 @@ int sas_register_phys(struct sas_ha_struct *sas_ha) phy->phy->identify.target_port_protocols = phy->tproto; phy->phy->identify.sas_address = SAS_ADDR(sas_ha->sas_addr); phy->phy->identify.phy_identifier = i; - phy->phy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS; - phy->phy->maximum_linkrate_hw = SAS_LINK_RATE_3_0_GBPS; - phy->phy->minimum_linkrate = SAS_LINK_RATE_1_5_GBPS; - phy->phy->maximum_linkrate = SAS_LINK_RATE_3_0_GBPS; + phy->phy->minimum_linkrate_hw = SAS_LINK_RATE_UNKNOWN; + phy->phy->maximum_linkrate_hw = SAS_LINK_RATE_UNKNOWN; + phy->phy->minimum_linkrate = SAS_LINK_RATE_UNKNOWN; + phy->phy->maximum_linkrate = SAS_LINK_RATE_UNKNOWN; phy->phy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN; sas_phy_add(phy->phy); diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h index 8d91313dd888..8e39982fc3db 100644 --- a/include/scsi/libsas.h +++ b/include/scsi/libsas.h @@ -586,7 +586,7 @@ struct sas_domain_function_template { int (*lldd_clear_nexus_ha)(struct sas_ha_struct *); /* Phy management */ - int (*lldd_control_phy)(struct asd_sas_phy *, enum phy_func); + int (*lldd_control_phy)(struct asd_sas_phy *, enum phy_func, void *); }; extern int sas_register_ha(struct sas_ha_struct *); diff --git a/include/scsi/sas.h b/include/scsi/sas.h index 9c8a5b91ae64..2f4b6afa34fc 100644 --- a/include/scsi/sas.h +++ b/include/scsi/sas.h @@ -121,6 +121,7 @@ enum phy_func { PHY_FUNC_CLEAR_AFFIL, PHY_FUNC_TX_SATA_PS_SIGNAL, PHY_FUNC_RELEASE_SPINUP_HOLD = 0x10, /* LOCAL PORT ONLY! */ + PHY_FUNC_SET_LINK_RATE, }; /* SAS LLDD would need to report only _very_few_ of those, like BROADCAST. -- cgit v1.2.3