[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>

drivers/scsi/Kconfig

@@ -209,7 +209,7 @@ config SCSI_LOGGING
 	  there should be no noticeable performance impact as long as you have
 	  logging turned off.
 
-menu "SCSI Transport Attributes"
+menu "SCSI Transports"
 	depends on SCSI
 
 config SCSI_SPI_ATTRS
@@ -242,6 +242,8 @@ config SCSI_SAS_ATTRS
 	  If you wish to export transport-specific information about
 	  each attached SAS device to sysfs, say Y.
 
+source "drivers/scsi/libsas/Kconfig"
+
 endmenu
 
 menu "SCSI low-level drivers"
@@ -431,6 +433,7 @@ config SCSI_AIC7XXX_OLD
 	  module will be called aic7xxx_old.
 
 source "drivers/scsi/aic7xxx/Kconfig.aic79xx"
+source "drivers/scsi/aic94xx/Kconfig"
 
 # All the I2O code and drivers do not seem to be 64bit safe.
 config SCSI_DPT_I2O

drivers/scsi/Makefile

@@ -32,6 +32,7 @@ obj-$(CONFIG_SCSI_SPI_ATTRS)	+= scsi_transport_spi.o
 obj-$(CONFIG_SCSI_FC_ATTRS) 	+= scsi_transport_fc.o
 obj-$(CONFIG_SCSI_ISCSI_ATTRS)	+= scsi_transport_iscsi.o
 obj-$(CONFIG_SCSI_SAS_ATTRS)	+= scsi_transport_sas.o
+obj-$(CONFIG_SCSI_SAS_LIBSAS)	+= libsas/
 
 obj-$(CONFIG_ISCSI_TCP) 	+= libiscsi.o	iscsi_tcp.o
 obj-$(CONFIG_INFINIBAND_ISER) 	+= libiscsi.o
@@ -68,6 +69,7 @@ obj-$(CONFIG_SCSI_AIC7XXX)	+= aic7xxx/
 obj-$(CONFIG_SCSI_AIC79XX)	+= aic7xxx/
 obj-$(CONFIG_SCSI_AACRAID)	+= aacraid/
 obj-$(CONFIG_SCSI_AIC7XXX_OLD)	+= aic7xxx_old.o
+obj-$(CONFIG_SCSI_AIC94XX)	+= aic94xx/
 obj-$(CONFIG_SCSI_IPS)		+= ips.o
 obj-$(CONFIG_SCSI_FD_MCS)	+= fd_mcs.o
 obj-$(CONFIG_SCSI_FUTURE_DOMAIN)+= fdomain.o

drivers/scsi/aic94xx/Kconfig

@@ -0,0 +1,41 @@
+#
+# Kernel configuration file for aic94xx SAS/SATA driver.
+#
+# Copyright (c) 2005 Adaptec, Inc.  All rights reserved.
+# Copyright (c) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
+#
+# This file is licensed under GPLv2.
+#
+# This file is part of the aic94xx driver.
+#
+# The aic94xx driver 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; version 2 of the
+# License.
+#
+# The aic94xx driver 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 Aic94xx Driver; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+#
+#
+
+config SCSI_AIC94XX
+	tristate "Adaptec AIC94xx SAS/SATA support"
+	depends on PCI
+	select SCSI_SAS_LIBSAS
+	help
+		This driver supports Adaptec's SAS/SATA 3Gb/s 64 bit PCI-X
+		AIC94xx chip based host adapters.
+
+config AIC94XX_DEBUG
+	bool "Compile in debug mode"
+	default y
+	depends on SCSI_AIC94XX
+	help
+		Compiles the aic94xx driver in debug mode.  In debug mode,
+		the driver prints some messages to the console.

drivers/scsi/aic94xx/Makefile

@@ -0,0 +1,39 @@
+#
+# Makefile for Adaptec aic94xx SAS/SATA driver.
+#
+# Copyright (C) 2005 Adaptec, Inc.  All rights reserved.
+# Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
+#
+# This file is licensed under GPLv2.
+#
+# This file is part of the the aic94xx driver.
+#
+# The aic94xx driver 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; version 2 of the
+# License.
+#
+# The aic94xx driver 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 the aic94xx driver; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+ifeq ($(CONFIG_AIC94XX_DEBUG),y)
+	EXTRA_CFLAGS += -DASD_DEBUG -DASD_ENTER_EXIT
+endif
+
+obj-$(CONFIG_SCSI_AIC94XX) += aic94xx.o
+aic94xx-y += aic94xx_init.o \
+	     aic94xx_hwi.o  \
+	     aic94xx_reg.o  \
+	     aic94xx_sds.o  \
+	     aic94xx_seq.o  \
+	     aic94xx_dump.o \
+	     aic94xx_scb.o  \
+	     aic94xx_dev.o  \
+	     aic94xx_tmf.o  \
+	     aic94xx_task.o

drivers/scsi/aic94xx/aic94xx.h

@@ -0,0 +1,114 @@
+/*
+ * Aic94xx SAS/SATA driver header file.
+ *
+ * Copyright (C) 2005 Adaptec, Inc.  All rights reserved.
+ * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
+ *
+ * This file is licensed under GPLv2.
+ *
+ * This file is part of the aic94xx driver.
+ *
+ * The aic94xx driver 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; version 2 of the
+ * License.
+ *
+ * The aic94xx driver 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 the aic94xx driver; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * $Id: //depot/aic94xx/aic94xx.h#31 $
+ */
+
+#ifndef _AIC94XX_H_
+#define _AIC94XX_H_
+
+#include <linux/slab.h>
+#include <linux/ctype.h>
+#include <scsi/libsas.h>
+
+#define ASD_DRIVER_NAME		"aic94xx"
+#define ASD_DRIVER_DESCRIPTION	"Adaptec aic94xx SAS/SATA driver"
+
+#define asd_printk(fmt, ...)	printk(KERN_NOTICE ASD_DRIVER_NAME ": " fmt, ## __VA_ARGS__)
+
+#ifdef ASD_ENTER_EXIT
+#define ENTER  printk(KERN_NOTICE "%s: ENTER %s\n", ASD_DRIVER_NAME, \
+		__FUNCTION__)
+#define EXIT   printk(KERN_NOTICE "%s: --EXIT %s\n", ASD_DRIVER_NAME, \
+		__FUNCTION__)
+#else
+#define ENTER
+#define EXIT
+#endif
+
+#ifdef ASD_DEBUG
+#define ASD_DPRINTK asd_printk
+#else
+#define ASD_DPRINTK(fmt, ...)
+#endif
+
+/* 2*ITNL timeout + 1 second */
+#define AIC94XX_SCB_TIMEOUT  (5*HZ)
+
+extern kmem_cache_t *asd_dma_token_cache;
+extern kmem_cache_t *asd_ascb_cache;
+extern char sas_addr_str[2*SAS_ADDR_SIZE + 1];
+
+static inline void asd_stringify_sas_addr(char *p, const u8 *sas_addr)
+{
+	int i;
+	for (i = 0; i < SAS_ADDR_SIZE; i++, p += 2)
+		snprintf(p, 3, "%02X", sas_addr[i]);
+	*p = '\0';
+}
+
+static inline void asd_destringify_sas_addr(u8 *sas_addr, const char *p)
+{
+	int i;
+	for (i = 0; i < SAS_ADDR_SIZE; i++) {
+		u8 h, l;
+		if (!*p)
+			break;
+		h = isdigit(*p) ? *p-'0' : *p-'A'+10;
+		p++;
+		l = isdigit(*p) ? *p-'0' : *p-'A'+10;
+		p++;
+		sas_addr[i] = (h<<4) | l;
+	}
+}
+
+struct asd_ha_struct;
+struct asd_ascb;
+
+int  asd_read_ocm(struct asd_ha_struct *asd_ha);
+int  asd_read_flash(struct asd_ha_struct *asd_ha);
+
+int  asd_dev_found(struct domain_device *dev);
+void asd_dev_gone(struct domain_device *dev);
+
+void asd_invalidate_edb(struct asd_ascb *ascb, int edb_id);
+
+int  asd_execute_task(struct sas_task *, int num, unsigned long gfp_flags);
+
+/* ---------- TMFs ---------- */
+int  asd_abort_task(struct sas_task *);
+int  asd_abort_task_set(struct domain_device *, u8 *lun);
+int  asd_clear_aca(struct domain_device *, u8 *lun);
+int  asd_clear_task_set(struct domain_device *, u8 *lun);
+int  asd_lu_reset(struct domain_device *, u8 *lun);
+int  asd_query_task(struct sas_task *);
+
+/* ---------- Adapter and Port management ---------- */
+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);
+
+#endif