[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
<ltuikov@yahoo.com>

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 <James.Bottomley@SteelEye.com>

1 files changed, 157 insertions, 0 deletions

diff --git a/drivers/scsi/libsas/sas_phy.c b/drivers/scsi/libsas/sas_phy.c
new file mode 100644
index 000000000000..024ab00e70d2
--- /dev/null
+++ b/drivers/scsi/libsas/sas_phy.c
@@ -0,0 +1,157 @@
+/*
+ * Serial Attached SCSI (SAS) Phy 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_host.h>
+#include <scsi/scsi_transport.h>
+#include <scsi/scsi_transport_sas.h>
+#include "../scsi_sas_internal.h"
+
+/* ---------- Phy events ---------- */
+
+static void sas_phye_loss_of_signal(void *data)
+{
+        struct asd_sas_phy *phy = data;
+
+        sas_begin_event(PHYE_LOSS_OF_SIGNAL, &phy->ha->event_lock,
+                        &phy->phy_events_pending);
+        phy->error = 0;
+        sas_deform_port(phy);
+}
+
+static void sas_phye_oob_done(void *data)
+{
+        struct asd_sas_phy *phy = data;
+
+        sas_begin_event(PHYE_OOB_DONE, &phy->ha->event_lock,
+                        &phy->phy_events_pending);
+        phy->error = 0;
+}
+
+static void sas_phye_oob_error(void *data)
+{
+        struct asd_sas_phy *phy = data;
+        struct sas_ha_struct *sas_ha = phy->ha;
+        struct asd_sas_port *port = phy->port;
+        struct sas_internal *i =
+                to_sas_internal(sas_ha->core.shost->transportt);
+
+        sas_begin_event(PHYE_OOB_ERROR, &phy->ha->event_lock,
+                        &phy->phy_events_pending);
+
+        sas_deform_port(phy);
+
+        if (!port && phy->enabled && i->dft->lldd_control_phy) {
+                phy->error++;
+                switch (phy->error) {
+                case 1:
+                case 2:
+                        i->dft->lldd_control_phy(phy, PHY_FUNC_HARD_RESET);
+                        break;
+                case 3:
+                default:
+                        phy->error = 0;
+                        phy->enabled = 0;
+                        i->dft->lldd_control_phy(phy, PHY_FUNC_DISABLE);
+                        break;
+                }
+        }
+}
+
+static void sas_phye_spinup_hold(void *data)
+{
+        struct asd_sas_phy *phy = data;
+        struct sas_ha_struct *sas_ha = phy->ha;
+        struct sas_internal *i =
+                to_sas_internal(sas_ha->core.shost->transportt);
+
+        sas_begin_event(PHYE_SPINUP_HOLD, &phy->ha->event_lock,
+                        &phy->phy_events_pending);
+
+        phy->error = 0;
+        i->dft->lldd_control_phy(phy, PHY_FUNC_RELEASE_SPINUP_HOLD);
+}
+
+/* ---------- Phy class registration ---------- */
+
+int sas_register_phys(struct sas_ha_struct *sas_ha)
+{
+        int i;
+
+        static void (*sas_phy_event_fns[PHY_NUM_EVENTS])(void *) = {
+                [PHYE_LOSS_OF_SIGNAL] = sas_phye_loss_of_signal,
+                [PHYE_OOB_DONE] = sas_phye_oob_done,
+                [PHYE_OOB_ERROR] = sas_phye_oob_error,
+                [PHYE_SPINUP_HOLD] = sas_phye_spinup_hold,
+        };
+
+        static void (*sas_port_event_fns[PORT_NUM_EVENTS])(void *) = {
+                [PORTE_BYTES_DMAED] = sas_porte_bytes_dmaed,
+                [PORTE_BROADCAST_RCVD] = sas_porte_broadcast_rcvd,
+                [PORTE_LINK_RESET_ERR] = sas_porte_link_reset_err,
+                [PORTE_TIMER_EVENT] = sas_porte_timer_event,
+                [PORTE_HARD_RESET] = sas_porte_hard_reset,
+        };
+
+        /* Now register the phys. */
+        for (i = 0; i < sas_ha->num_phys; i++) {
+                int k;
+                struct asd_sas_phy *phy = sas_ha->sas_phy[i];
+
+                phy->error = 0;
+                INIT_LIST_HEAD(&phy->port_phy_el);
+                for (k = 0; k < PORT_NUM_EVENTS; k++)
+                        INIT_WORK(&phy->port_events[k], sas_port_event_fns[k],
+                                  phy);
+
+                for (k = 0; k < PHY_NUM_EVENTS; k++)
+                        INIT_WORK(&phy->phy_events[k], sas_phy_event_fns[k],
+                                  phy);
+                phy->port = NULL;
+                phy->ha = sas_ha;
+                spin_lock_init(&phy->frame_rcvd_lock);
+                spin_lock_init(&phy->sas_prim_lock);
+                phy->frame_rcvd_size = 0;
+
+                phy->phy = sas_phy_alloc(&sas_ha->core.shost->shost_gendev,
+                                         i);
+                if (!phy->phy)
+                        return -ENOMEM;
+
+                phy->phy->identify.initiator_port_protocols =
+                        phy->iproto;
+                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->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
+
+                sas_phy_add(phy->phy);
+        }
+
+        return 0;
+}