ips.c

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/*****************************************************************************/
/* ips.c -- driver for the IBM ServeRAID controller                          */
/*                                                                           */
/* Written By: Keith Mitchell, IBM Corporation                               */
/*                                                                           */
/* Copyright (C) 1999 IBM Corporation                                        */
/*                                                                           */
/* 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.                              */
/*                                                                           */
/* NO WARRANTY                                                               */
/* THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR        */
/* CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT      */
/* LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,      */
/* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is    */
/* solely responsible for determining the appropriateness of using and       */
/* distributing the Program and assumes all risks associated with its        */
/* exercise of rights under this Agreement, including but not limited to     */
/* the risks and costs of program errors, damage to or loss of data,         */
/* programs or equipment, and unavailability or interruption of operations.  */
/*                                                                           */
/* DISCLAIMER OF LIABILITY                                                   */
/* NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY   */
/* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL        */
/* DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND   */
/* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR     */
/* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE    */
/* USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED  */
/* HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES             */
/*                                                                           */
/* 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
/*                                                                           */
/* Bugs/Comments/Suggestions should be mailed to:                            */
/*      [e-mail]                                                  */
/*                                                                           */
/*****************************************************************************/

/*****************************************************************************/
/* Change Log                                                                */
/*                                                                           */
/* 0.99.02  - Breakup commands that are bigger than 8 * the stripe size      */
/* 0.99.03  - Make interrupt routine handle all completed request on the     */
/*            adapter not just the first one                                 */
/*          - Make sure passthru commands get woken up if we run out of      */
/*            SCBs                                                           */
/*          - Send all of the commands on the queue at once rather than      */
/*            one at a time since the card will support it.                  */
/* 0.99.04  - Fix race condition in the passthru mechanism -- this required  */
/*            the interface to the utilities to change                       */
/*          - Fix error recovery code                                        */
/* 0.99.05  - Fix an oops when we get certain passthru commands              */
/* 1.00.00  - Initial Public Release                                         */
/*            Functionally equivalent to 0.99.05                             */
/* 3.60.00  - Bump max commands to 128 for use with ServeRAID firmware 3.60  */
/*          - Change version to 3.60 to coincide with ServeRAID release      */
/*            numbering.                                                     */
/* 3.60.01  - Remove bogus error check in passthru routine                   */
/* 3.60.02  - Make DCDB direction based on lookup table                      */
/*          - Only allow one DCDB command to a SCSI ID at a time             */
/* 4.00.00  - Add support for ServeRAID 4                                    */
/* 4.00.01  - Add support for First Failure Data Capture                     */
/* 4.00.02  - Fix problem with PT DCDB with no buffer                        */
/* 4.00.03  - Add alternative passthru interface                             */
/*          - Add ability to flash ServeRAID BIOS                            */
/* 4.00.04  - Rename structures/constants to be prefixed with IPS_           */
/* 4.00.05  - Remove wish_block from init routine                            */
/*          - Use linux/spinlock.h instead of asm/spinlock.h for kernels     */
/*            2.3.18 and later                                               */
/*          - Sync with other changes from the 2.3 kernels                   */
/* 4.00.06  - Fix timeout with initial FFDC command                          */
/* 4.00.06a - Port to 2.4 (trivial) -- Christoph Hellwig <[e-mail]>    */
/* 4.10.00  - Add support for ServeRAID 4M/4L                                */
/* 4.10.13  - Fix for dynamic unload and proc file system                    */
/* 4.20.03  - Rename version to coincide with new release schedules          */
/*            Performance fixes                                              */
/*            Fix truncation of /proc files with cat                         */
/*            Merge in changes through kernel 2.4.0test1ac21                 */
/* 4.20.13  - Fix some failure cases / reset code                            */
/*          - Hook into the reboot_notifier to flush the controller cache    */
/*                                                                           */
/*****************************************************************************/

/*
 * Conditional Compilation directives for this driver:
 *
 * IPS_DEBUG            - Turn on debugging info
 *
 *
 * Parameters:
 *
 * debug:<number>       - Set debug level to <number>
 *                        NOTE: only works when IPS_DEBUG compile directive
 *                              is used.
 *
 *       1              - Normal debug messages
 *       2              - Verbose debug messages
 *       11             - Method trace (non interrupt)
 *       12             - Method trace (includes interrupt)
 *
 * noreset              - Don't reset the controller
 * nocmdline            - Turn off passthru support
 * noi2o                - Don't use I2O Queues (ServeRAID 4 only)
 * nommap               - Don't use memory mapped I/O
 */
  

#include <linux/module.h>

#include <asm/io.h>
#include <asm/byteorder.h>
#include <linux/stddef.h>
#include <linux/version.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/ioport.h>
#include <linux/malloc.h>
#include <linux/vmalloc.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/pci.h>
#include <linux/proc_fs.h>
#include <linux/reboot.h>

#include <linux/blk.h>
#include <linux/types.h>

#ifndef NO_IPS_CMDLINE
#include <scsi/sg.h>
#endif

#include "sd.h"
#include "scsi.h"
#include "hosts.h"
#include "ips.h"

#include <linux/stat.h>
#include <linux/config.h>

#if LINUX_VERSION_CODE >= LinuxVersionCode(2,3,18)
#include <linux/spinlock.h>
#else
#include <asm/spinlock.h>
#endif

#if LINUX_VERSION_CODE >= LinuxVersionCode(2,3,13)
#include <linux/init.h>
#endif

#include <linux/smp.h>

#ifdef MODULE
   static char *ips = NULL;
   MODULE_PARM(ips, "s");
#endif

/*
 * DRIVER_VER
 */
#define IPS_VERSION_HIGH        "4.20"
#define IPS_VERSION_LOW         ".20 "

#if LINUX_VERSION_CODE < LinuxVersionCode(2,3,27)
struct proc_dir_entry proc_scsi_ips = {
   0,
   3, "ips",
   S_IFDIR | S_IRUGO | S_IXUGO, 2
};
#endif

#if !defined(__i386__)
   #error "This driver has only been tested on the x86 platform"
#endif

#if LINUX_VERSION_CODE < LinuxVersionCode(2,2,0)
   #error "This driver only works with kernel 2.2.0 and later"
#endif

#if !defined(NO_IPS_CMDLINE) && ((SG_BIG_BUFF < 8192) || !defined(SG_BIG_BUFF))
   #error "To use the command-line interface you need to define SG_BIG_BUFF"
#endif

#ifdef IPS_DEBUG
   #define METHOD_TRACE(s, i)    if (ips_debug >= (i+10)) printk(KERN_NOTICE s "\n");
   #define DEBUG(i, s)           if (ips_debug >= i) printk(KERN_NOTICE s "\n");
   #define DEBUG_VAR(i, s, v...) if (ips_debug >= i) printk(KERN_NOTICE s "\n", v);
#else
   #define METHOD_TRACE(s, i)
   #define DEBUG(i, s)
   #define DEBUG_VAR(i, s, v...)
#endif

/*
 * global variables
 */
static const char * ips_name = "ips";
static struct Scsi_Host * ips_sh[IPS_MAX_ADAPTERS];  /* Array of host controller structures */
static ips_ha_t * ips_ha[IPS_MAX_ADAPTERS];          /* Array of HA structures */
static unsigned int ips_next_controller = 0;
static unsigned int ips_num_controllers = 0;
static unsigned int ips_released_controllers = 0;
static int          ips_cmd_timeout = 60;
static int          ips_reset_timeout = 60 * 5;
static int          ips_force_memio = 1;             /* Always use Memory Mapped I/O    */
static int          ips_force_i2o = 1;               /* Always use I2O command delivery */
static int          ips_resetcontroller = 1;         /* Reset the controller            */
static int          ips_cmdline = 1;                 /* Support for passthru            */

#ifdef IPS_DEBUG
static int          ips_debug = 0;                   /* Debug mode                      */
#endif

/*
 * Necessary forward function protoypes
 */
static int ips_halt(struct notifier_block *nb, ulong event, void *buf);

#define MAX_ADAPTER_NAME 9

static char ips_adapter_name[][30] = {
   "ServeRAID",
   "ServeRAID II",
   "ServeRAID on motherboard",
   "ServeRAID on motherboard",
   "ServeRAID 3H",
   "ServeRAID 3L",
   "ServeRAID 4H",
   "ServeRAID 4M",
   "ServeRAID 4L"
};

static struct notifier_block ips_notifier = {
   ips_halt, NULL, 0
};

/*
 * Direction table
 */
static char ips_command_direction[] = {
IPS_DATA_NONE, IPS_DATA_NONE, IPS_DATA_IN,   IPS_DATA_IN,   IPS_DATA_OUT,
IPS_DATA_IN,   IPS_DATA_IN,   IPS_DATA_OUT,  IPS_DATA_IN,   IPS_DATA_UNK,
IPS_DATA_OUT,  IPS_DATA_OUT,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,
IPS_DATA_IN,   IPS_DATA_NONE, IPS_DATA_IN,   IPS_DATA_IN,   IPS_DATA_OUT,
IPS_DATA_IN,   IPS_DATA_OUT,  IPS_DATA_NONE, IPS_DATA_NONE, IPS_DATA_OUT,
IPS_DATA_NONE, IPS_DATA_IN,   IPS_DATA_NONE, IPS_DATA_IN,   IPS_DATA_OUT,
IPS_DATA_NONE, IPS_DATA_UNK,  IPS_DATA_IN,   IPS_DATA_UNK,  IPS_DATA_IN,
IPS_DATA_UNK,  IPS_DATA_OUT,  IPS_DATA_IN,   IPS_DATA_UNK,  IPS_DATA_UNK,
IPS_DATA_IN,   IPS_DATA_IN,   IPS_DATA_OUT,  IPS_DATA_NONE, IPS_DATA_UNK,
IPS_DATA_IN,   IPS_DATA_OUT,  IPS_DATA_OUT,  IPS_DATA_OUT,  IPS_DATA_OUT,
IPS_DATA_OUT,  IPS_DATA_NONE, IPS_DATA_IN,   IPS_DATA_NONE, IPS_DATA_NONE,
IPS_DATA_IN,   IPS_DATA_OUT,  IPS_DATA_OUT,  IPS_DATA_OUT,  IPS_DATA_OUT,
IPS_DATA_IN,   IPS_DATA_OUT,  IPS_DATA_IN,   IPS_DATA_OUT,  IPS_DATA_OUT,
IPS_DATA_OUT,  IPS_DATA_IN,   IPS_DATA_IN,   IPS_DATA_IN,   IPS_DATA_NONE,
IPS_DATA_UNK,  IPS_DATA_NONE, IPS_DATA_NONE, IPS_DATA_NONE, IPS_DATA_UNK,
IPS_DATA_NONE, IPS_DATA_OUT,  IPS_DATA_IN,   IPS_DATA_UNK,  IPS_DATA_UNK,
IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,
IPS_DATA_OUT,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,
IPS_DATA_IN,   IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,
IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,
IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,
IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,
IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,
IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,
IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,
IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,
IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,
IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,
IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,
IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,
IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,
IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,
IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,
IPS_DATA_NONE, IPS_DATA_NONE, IPS_DATA_UNK,  IPS_DATA_IN,   IPS_DATA_NONE,
IPS_DATA_OUT,  IPS_DATA_UNK,  IPS_DATA_NONE, IPS_DATA_UNK,  IPS_DATA_OUT,
IPS_DATA_OUT,  IPS_DATA_OUT,  IPS_DATA_OUT,  IPS_DATA_OUT,  IPS_DATA_NONE,
IPS_DATA_UNK,  IPS_DATA_IN,   IPS_DATA_OUT,  IPS_DATA_IN,   IPS_DATA_IN,
IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,
IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,
IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,
IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,
IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,
IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,
IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,
IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,
IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,
IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_OUT,
IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,
IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,
IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,
IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK,  IPS_DATA_UNK
};

/*
 * Function prototypes
 */
int ips_detect(Scsi_Host_Template *);
int ips_release(struct Scsi_Host *);
int ips_eh_abort(Scsi_Cmnd *);
int ips_eh_reset(Scsi_Cmnd *);
int ips_queue(Scsi_Cmnd *, void (*) (Scsi_Cmnd *));
int ips_biosparam(Disk *, kdev_t, int *);
const char * ips_info(struct Scsi_Host *);
void do_ipsintr(int, void *, struct pt_regs *);
static int ips_hainit(ips_ha_t *);
static int ips_map_status(ips_ha_t *, ips_scb_t *, ips_stat_t *);
static int ips_send(ips_ha_t *, ips_scb_t *, ips_scb_callback);
static int ips_send_wait(ips_ha_t *, ips_scb_t *, int, int);
static int ips_send_cmd(ips_ha_t *, ips_scb_t *);
static int ips_online(ips_ha_t *, ips_scb_t *);
static int ips_inquiry(ips_ha_t *, ips_scb_t *);
static int ips_rdcap(ips_ha_t *, ips_scb_t *);
static int ips_msense(ips_ha_t *, ips_scb_t *);
static int ips_reqsen(ips_ha_t *, ips_scb_t *);
static int ips_allocatescbs(ips_ha_t *);
static int ips_reset_copperhead(ips_ha_t *);
static int ips_reset_copperhead_memio(ips_ha_t *);
static int ips_reset_morpheus(ips_ha_t *);
static int ips_issue_copperhead(ips_ha_t *, ips_scb_t *);
static int ips_issue_copperhead_memio(ips_ha_t *, ips_scb_t *);
static int ips_issue_i2o(ips_ha_t *, ips_scb_t *);
static int ips_issue_i2o_memio(ips_ha_t *, ips_scb_t *);
static int ips_isintr_copperhead(ips_ha_t *);
static int ips_isintr_copperhead_memio(ips_ha_t *);
static int ips_isintr_morpheus(ips_ha_t *);
static int ips_wait(ips_ha_t *, int, int);
static int ips_write_driver_status(ips_ha_t *, int);
static int ips_read_adapter_status(ips_ha_t *, int);
static int ips_read_subsystem_parameters(ips_ha_t *, int);
static int ips_read_config(ips_ha_t *, int);
static int ips_clear_adapter(ips_ha_t *, int);
static int ips_readwrite_page5(ips_ha_t *, int, int);
static int ips_init_copperhead(ips_ha_t *);
static int ips_init_copperhead_memio(ips_ha_t *);
static int ips_init_morpheus(ips_ha_t *);
static int ips_isinit_copperhead(ips_ha_t *);
static int ips_isinit_copperhead_memio(ips_ha_t *);
static int ips_isinit_morpheus(ips_ha_t *);
static u32 ips_statupd_copperhead(ips_ha_t *);
static u32 ips_statupd_copperhead_memio(ips_ha_t *);
static u32 ips_statupd_morpheus(ips_ha_t *);
static void ips_select_queue_depth(struct Scsi_Host *, Scsi_Device *);
static void ips_chkstatus(ips_ha_t *, IPS_STATUS *);
static void ips_enable_int_copperhead(ips_ha_t *);
static void ips_enable_int_copperhead_memio(ips_ha_t *);
static void ips_enable_int_morpheus(ips_ha_t *);
static void ips_intr_copperhead(ips_ha_t *);
static void ips_intr_morpheus(ips_ha_t *);
static void ips_next(ips_ha_t *, int);
static void ipsintr_blocking(ips_ha_t *, struct ips_scb *);
static void ipsintr_done(ips_ha_t *, struct ips_scb *);
static void ips_done(ips_ha_t *, ips_scb_t *);
static void ips_free(ips_ha_t *);
static void ips_init_scb(ips_ha_t *, ips_scb_t *);
static void ips_freescb(ips_ha_t *, ips_scb_t *);
static void ips_statinit(ips_ha_t *);
static void ips_statinit_memio(ips_ha_t *);
static void ips_fix_ffdc_time(ips_ha_t *, ips_scb_t *, time_t);
static void ips_ffdc_reset(ips_ha_t *, int);
static void ips_ffdc_time(ips_ha_t *, int);
static ips_scb_t * ips_getscb(ips_ha_t *);
static inline void ips_putq_scb_head(ips_scb_queue_t *, ips_scb_t *);