[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, 302 insertions, 0 deletions

diff --git a/drivers/scsi/aic94xx/aic94xx_reg.h b/drivers/scsi/aic94xx/aic94xx_reg.h
new file mode 100644
index 000000000000..2279307fd27e
--- /dev/null
+++ b/drivers/scsi/aic94xx/aic94xx_reg.h
@@ -0,0 +1,302 @@
+/*
+ * Aic94xx SAS/SATA driver hardware registers definitions.
+ *
+ * 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
+ *
+ */
+
+#ifndef _AIC94XX_REG_H_
+#define _AIC94XX_REG_H_
+
+#include <asm/io.h>
+#include "aic94xx_hwi.h"
+
+/* Values */
+#define AIC9410_DEV_REV_B0            0x8
+
+/* MBAR0, SWA, SWB, SWC, internal memory space addresses */
+#define REG_BASE_ADDR                 0xB8000000
+#define REG_BASE_ADDR_CSEQCIO         0xB8002000
+#define REG_BASE_ADDR_EXSI            0xB8042800
+
+#define MBAR0_SWA_SIZE                0x58
+extern  u32    MBAR0_SWB_SIZE;
+#define MBAR0_SWC_SIZE                0x8
+
+/* MBAR1, points to On Chip Memory */
+#define OCM_BASE_ADDR                 0xA0000000
+#define OCM_MAX_SIZE                  0x20000
+
+/* Smallest address possible to reference */
+#define ALL_BASE_ADDR                 OCM_BASE_ADDR
+
+/* PCI configuration space registers */
+#define PCI_IOBAR_OFFSET              4
+
+#define PCI_CONF_MBAR1                0x6C
+#define PCI_CONF_MBAR0_SWA            0x70
+#define PCI_CONF_MBAR0_SWB            0x74
+#define PCI_CONF_MBAR0_SWC            0x78
+#define PCI_CONF_MBAR_KEY             0x7C
+#define PCI_CONF_FLSH_BAR             0xB8
+
+#include "aic94xx_reg_def.h"
+
+u8  asd_read_reg_byte(struct asd_ha_struct *asd_ha, u32 reg);
+u16 asd_read_reg_word(struct asd_ha_struct *asd_ha, u32 reg);
+u32 asd_read_reg_dword(struct asd_ha_struct *asd_ha, u32 reg);
+
+void asd_write_reg_byte(struct asd_ha_struct *asd_ha, u32 reg, u8 val);
+void asd_write_reg_word(struct asd_ha_struct *asd_ha, u32 reg, u16 val);
+void asd_write_reg_dword(struct asd_ha_struct *asd_ha, u32 reg, u32 val);
+
+void asd_read_reg_string(struct asd_ha_struct *asd_ha, void *dst,
+                         u32 offs, int count);
+void asd_write_reg_string(struct asd_ha_struct *asd_ha, void *src,
+                          u32 offs, int count);
+
+#define ASD_READ_OCM(type, ord, S)                                    \
+static inline type asd_read_ocm_##ord (struct asd_ha_struct *asd_ha,  \
+                                         u32 offs)                    \
+{                                                                     \
+        struct asd_ha_addrspace *io_handle = &asd_ha->io_handle[1];   \
+        type val = read##S (io_handle->addr + (unsigned long) offs);  \
+        rmb();                                                        \
+        return val;                                                   \
+}
+
+ASD_READ_OCM(u8, byte, b);
+ASD_READ_OCM(u16,word, w);
+ASD_READ_OCM(u32,dword,l);
+
+#define ASD_WRITE_OCM(type, ord, S)                                    \
+static inline void asd_write_ocm_##ord (struct asd_ha_struct *asd_ha,  \
+                                         u32 offs, type val)          \
+{                                                                     \
+        struct asd_ha_addrspace *io_handle = &asd_ha->io_handle[1];   \
+        write##S (val, io_handle->addr + (unsigned long) offs);       \
+        return;                                                       \
+}
+
+ASD_WRITE_OCM(u8, byte, b);
+ASD_WRITE_OCM(u16,word, w);
+ASD_WRITE_OCM(u32,dword,l);
+
+#define ASD_DDBSITE_READ(type, ord)                                        \
+static inline type asd_ddbsite_read_##ord (struct asd_ha_struct *asd_ha,   \
+                                           u16 ddb_site_no,                \
+                                           u16 offs)                       \
+{                                                                          \
+        asd_write_reg_word(asd_ha, ALTCIOADR, MnDDB_SITE + offs);          \
+        asd_write_reg_word(asd_ha, ADDBPTR, ddb_site_no);                  \
+        return asd_read_reg_##ord (asd_ha, CTXACCESS);                     \
+}
+
+ASD_DDBSITE_READ(u32, dword);
+ASD_DDBSITE_READ(u16, word);
+
+static inline u8 asd_ddbsite_read_byte(struct asd_ha_struct *asd_ha,
+                                       u16 ddb_site_no,
+                                       u16 offs)
+{
+        if (offs & 1)
+                return asd_ddbsite_read_word(asd_ha, ddb_site_no,
+                                             offs & ~1) >> 8;
+        else
+                return asd_ddbsite_read_word(asd_ha, ddb_site_no,
+                                             offs) & 0xFF;
+}
+
+
+#define ASD_DDBSITE_WRITE(type, ord)                                       \
+static inline void asd_ddbsite_write_##ord (struct asd_ha_struct *asd_ha,  \
+                                        u16 ddb_site_no,                   \
+                                        u16 offs, type val)                \
+{                                                                          \
+        asd_write_reg_word(asd_ha, ALTCIOADR, MnDDB_SITE + offs);          \
+        asd_write_reg_word(asd_ha, ADDBPTR, ddb_site_no);                  \
+        asd_write_reg_##ord (asd_ha, CTXACCESS, val);                      \
+}
+
+ASD_DDBSITE_WRITE(u32, dword);
+ASD_DDBSITE_WRITE(u16, word);
+
+static inline void asd_ddbsite_write_byte(struct asd_ha_struct *asd_ha,
+                                          u16 ddb_site_no,
+                                          u16 offs, u8 val)
+{
+        u16 base = offs & ~1;
+        u16 rval = asd_ddbsite_read_word(asd_ha, ddb_site_no, base);
+        if (offs & 1)
+                rval = (val << 8) | (rval & 0xFF);
+        else
+                rval = (rval & 0xFF00) | val;
+        asd_ddbsite_write_word(asd_ha, ddb_site_no, base, rval);
+}
+
+
+#define ASD_SCBSITE_READ(type, ord)                                        \
+static inline type asd_scbsite_read_##ord (struct asd_ha_struct *asd_ha,   \
+                                           u16 scb_site_no,                \
+                                           u16 offs)                       \
+{                                                                          \
+        asd_write_reg_word(asd_ha, ALTCIOADR, MnSCB_SITE + offs);          \
+        asd_write_reg_word(asd_ha, ASCBPTR, scb_site_no);                  \
+        return asd_read_reg_##ord (asd_ha, CTXACCESS);                     \
+}
+
+ASD_SCBSITE_READ(u32, dword);
+ASD_SCBSITE_READ(u16, word);
+
+static inline u8 asd_scbsite_read_byte(struct asd_ha_struct *asd_ha,
+                                       u16 scb_site_no,
+                                       u16 offs)
+{
+        if (offs & 1)
+                return asd_scbsite_read_word(asd_ha, scb_site_no,
+                                             offs & ~1) >> 8;
+        else
+                return asd_scbsite_read_word(asd_ha, scb_site_no,
+                                             offs) & 0xFF;
+}
+
+
+#define ASD_SCBSITE_WRITE(type, ord)                                       \
+static inline void asd_scbsite_write_##ord (struct asd_ha_struct *asd_ha,  \
+                                        u16 scb_site_no,                   \
+                                        u16 offs, type val)                \
+{                                                                          \
+        asd_write_reg_word(asd_ha, ALTCIOADR, MnSCB_SITE + offs);          \
+        asd_write_reg_word(asd_ha, ASCBPTR, scb_site_no);                  \
+        asd_write_reg_##ord (asd_ha, CTXACCESS, val);                      \
+}
+
+ASD_SCBSITE_WRITE(u32, dword);
+ASD_SCBSITE_WRITE(u16, word);
+
+static inline void asd_scbsite_write_byte(struct asd_ha_struct *asd_ha,
+                                          u16 scb_site_no,
+                                          u16 offs, u8 val)
+{
+        u16 base = offs & ~1;
+        u16 rval = asd_scbsite_read_word(asd_ha, scb_site_no, base);
+        if (offs & 1)
+                rval = (val << 8) | (rval & 0xFF);
+        else
+                rval = (rval & 0xFF00) | val;
+        asd_scbsite_write_word(asd_ha, scb_site_no, base, rval);
+}
+
+/**
+ * asd_ddbsite_update_word -- atomically update a word in a ddb site
+ * @asd_ha: pointer to host adapter structure
+ * @ddb_site_no: the DDB site number
+ * @offs: the offset into the DDB
+ * @oldval: old value found in that offset
+ * @newval: the new value to replace it
+ *
+ * This function is used when the sequencers are running and we need to
+ * update a DDB site atomically without expensive pausing and upausing
+ * of the sequencers and accessing the DDB site through the CIO bus.
+ *
+ * Return 0 on success; -EFAULT on parity error; -EAGAIN if the old value
+ * is different than the current value at that offset.
+ */
+static inline int asd_ddbsite_update_word(struct asd_ha_struct *asd_ha,
+                                          u16 ddb_site_no, u16 offs,
+                                          u16 oldval, u16 newval)
+{
+        u8  done;
+        u16 oval = asd_ddbsite_read_word(asd_ha, ddb_site_no, offs);
+        if (oval != oldval)
+                return -EAGAIN;
+        asd_write_reg_word(asd_ha, AOLDDATA, oldval);
+        asd_write_reg_word(asd_ha, ANEWDATA, newval);
+        do {
+                done = asd_read_reg_byte(asd_ha, ATOMICSTATCTL);
+        } while (!(done & ATOMICDONE));
+        if (done & ATOMICERR)
+                return -EFAULT;   /* parity error */
+        else if (done & ATOMICWIN)
+                return 0;         /* success */
+        else
+                return -EAGAIN;   /* oldval different than current value */
+}
+
+static inline int asd_ddbsite_update_byte(struct asd_ha_struct *asd_ha,
+                                          u16 ddb_site_no, u16 offs,
+                                          u8 _oldval, u8 _newval)
+{
+        u16 base = offs & ~1;
+        u16 oval;
+        u16 nval = asd_ddbsite_read_word(asd_ha, ddb_site_no, base);
+        if (offs & 1) {
+                if ((nval >> 8) != _oldval)
+                        return -EAGAIN;
+                nval = (_newval << 8) | (nval & 0xFF);
+                oval = (_oldval << 8) | (nval & 0xFF);
+        } else {
+                if ((nval & 0xFF) != _oldval)
+                        return -EAGAIN;
+                nval = (nval & 0xFF00) | _newval;
+                oval = (nval & 0xFF00) | _oldval;
+        }
+        return asd_ddbsite_update_word(asd_ha, ddb_site_no, base, oval, nval);
+}
+
+static inline void asd_write_reg_addr(struct asd_ha_struct *asd_ha, u32 reg,
+                                      dma_addr_t dma_handle)
+{
+        asd_write_reg_dword(asd_ha, reg,   ASD_BUSADDR_LO(dma_handle));
+        asd_write_reg_dword(asd_ha, reg+4, ASD_BUSADDR_HI(dma_handle));
+}
+
+static inline u32 asd_get_cmdctx_size(struct asd_ha_struct *asd_ha)
+{
+        /* DCHREVISION returns 0, possibly broken */
+        u32 ctxmemsize = asd_read_reg_dword(asd_ha, LmMnINT(0,0)) & CTXMEMSIZE;
+        return ctxmemsize ? 65536 : 32768;
+}
+
+static inline u32 asd_get_devctx_size(struct asd_ha_struct *asd_ha)
+{
+        u32 ctxmemsize = asd_read_reg_dword(asd_ha, LmMnINT(0,0)) & CTXMEMSIZE;
+        return ctxmemsize ? 8192 : 4096;
+}
+
+static inline void asd_disable_ints(struct asd_ha_struct *asd_ha)
+{
+        asd_write_reg_dword(asd_ha, CHIMINTEN, RST_CHIMINTEN);
+}
+
+static inline void asd_enable_ints(struct asd_ha_struct *asd_ha)
+{
+        /* Enable COM SAS interrupt on errors, COMSTAT */
+        asd_write_reg_dword(asd_ha, COMSTATEN,
+                            EN_CSBUFPERR | EN_CSERR | EN_OVLYERR);
+        /* Enable DCH SAS CFIFTOERR */
+        asd_write_reg_dword(asd_ha, DCHSTATUS, EN_CFIFTOERR);
+        /* Enable Host Device interrupts */
+        asd_write_reg_dword(asd_ha, CHIMINTEN, SET_CHIMINTEN);
+}
+
+#endif