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/*===================================================================
*
* Linux MegaRAID device driver
*
* Copyright 2001 American Megatrends Inc.
*
* 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.
*
* Version : v1.17a (July 13, 2001)
*
* Description: Linux device driver for AMI MegaRAID controller
*
* Supported controllers: MegaRAID 418, 428, 438, 466, 762, 467, 471, 490
* 493.
* History:
*
* Version 0.90:
* Original source contributed by Dell; integrated it into the kernel and
* cleaned up some things. Added support for 438/466 controllers.
* Version 0.91:
* Aligned mailbox area on 16-byte boundary.
* Added schedule() at the end to properly clean up.
* Made improvements for conformity to linux driver standards.
*
* Version 0.92:
* Added support for 2.1 kernels.
* Reads from pci_dev struct, so it's not dependent on pcibios.
* Added some missing virt_to_bus() translations.
* Added support for SMP.
* Changed global cli()'s to spinlocks for 2.1, and simulated
* spinlocks for 2.0.
* Removed setting of SA_INTERRUPT flag when requesting Irq.
*
* Version 0.92ac:
* Small changes to the comments/formatting. Plus a couple of
* added notes. Returned to the authors. No actual code changes
* save printk levels.
* 8 Oct 98 Alan Cox <alan.cox@linux.org>
*
* Merged with 2.1.131 source tree.
* 12 Dec 98 K. Baranowski <kgb@knm.org.pl>
*
* Version 0.93:
* Added support for vendor specific ioctl commands (M_RD_IOCTL_CMD+xxh)
* Changed some fields in MEGARAID struct to better values.
* Added signature check for Rp controllers under 2.0 kernels
* Changed busy-wait loop to be time-based
* Fixed SMP race condition in isr
* Added kfree (sgList) on release
* Added #include linux/version.h to megaraid.h for hosts.h
* Changed max_id to represent max logical drives instead of targets.
*
* Version 0.94:
* Got rid of some excess locking/unlocking
* Fixed slight memory corruption problem while memcpy'ing into mailbox
* Changed logical drives to be reported as luns rather than targets
* Changed max_id to 16 since it is now max targets/chan again.
* Improved ioctl interface for upcoming megamgr
*
* Version 0.95:
* Fixed problem of queueing multiple commands to adapter;
* still has some strange problems on some setups, so still
* defaults to single. To enable parallel commands change
* #define MULTI_IO in megaraid.h
* Changed kmalloc allocation to be done in beginning.
* Got rid of C++ style comments
*
* Version 0.96:
* 762 fully supported.
*
* Version 0.97:
* Changed megaraid_command to use wait_queue.
*
* Version 1.00:
* Checks to see if an irq occurred while in isr, and runs through
* routine again.
* Copies mailbox to temp area before processing in isr
* Added barrier() in busy wait to fix volatility bug
* Uses separate list for freed Scbs, keeps track of cmd state
* Put spinlocks around entire queue function for now...
* Full multi-io commands working stablely without previous problems
* Added skipXX LILO option for Madrona motherboard support
*
* Version 1.01:
* Fixed bug in mega_cmd_done() for megamgr control commands,
* the host_byte in the result code from the scsi request to
* scsi midlayer is set to DID_BAD_TARGET when adapter's
* returned codes are 0xF0 and 0xF4.
*
* Version 1.02:
* Fixed the tape drive bug by extending the adapter timeout value
* for passthrough command to 60 seconds in mega_build_cmd().
*
* Version 1.03:
* Fixed Madrona support.
* Changed the adapter timeout value from 60 sec in 1.02 to 10 min
* for bigger and slower tape drive.
* Added driver version printout at driver loadup time
*
* Version 1.04
* Added code for 40 ld FW support.
* Added new ioctl command 0x81 to support NEW_READ/WRITE_CONFIG with
* data area greater than 4 KB, which is the upper bound for data
* tranfer through scsi_ioctl interface.
* The additional 32 bit field for 64bit address in the newly defined
* mailbox64 structure is set to 0 at this point.
*
* Version 1.05
* Changed the queing implementation for handling SCBs and completed
* commands.
* Added spinlocks in the interrupt service routine to enable the driver
* function in the SMP environment.
* Fixed the problem of unnecessary aborts in the abort entry point, which
* also enables the driver to handle large amount of I/O requests for
* long duration of time.
* Version 1.06
* Intel Release
* Version 1.07
* Removed the usage of uaccess.h file for kernel versions less than
* 2.0.36, as this file is not present in those versions.
*
* Version 108
* Modified mega_ioctl so that 40LD megamanager would run
* Made some changes for 2.3.XX compilation , esp wait structures
* Code merge between 1.05 and 1.06 .
* Bug fixed problem with ioctl interface for concurrency between
* 8ld and 40ld firwmare
* Removed the flawed semaphore logic for handling new config command
* Added support for building own scatter / gather list for big user
* mode buffers
* Added /proc file system support ,so that information is available in
* human readable format
*
* Version 1a08
* Changes for IA64 kernels. Checked for CONFIG_PROC_FS flag
*
* Version 1b08
* Include file changes.
* Version 1b08b
* Change PCI ID value for the 471 card, use #defines when searching
* for megaraid cards.
*
* Version 1.10
*
* I) Changes made to make following ioctl commands work in 0x81 interface
* a)DCMD_DELETE_LOGDRV
* b)DCMD_GET_DISK_CONFIG
* c)DCMD_DELETE_DRIVEGROUP
* d)NC_SUBOP_ENQUIRY3
* e)DCMD_CHANGE_LDNO
* f)DCMD_CHANGE_LOOPID
* g)DCMD_FC_READ_NVRAM_CONFIG
* h)DCMD_WRITE_CONFIG
* II) Added mega_build_kernel_sg function
* III)Firmware flashing option added
*
* Version 1.10a
*
* I)Dell updates included in the source code.
* Note: This change is not tested due to the unavailability of IA64 kernel
* and it is in the #ifdef DELL_MODIFICATION macro which is not defined
*
* Version 1.10b
*
* I)In M_RD_IOCTL_CMD_NEW command the wrong way of copying the data
* to the user address corrected
*
* Version 1.10c
*
* I) DCMD_GET_DISK_CONFIG opcode updated for the firmware changes.
*
* Version 1.11
* I) Version number changed from 1.10c to 1.11
* II) DCMD_WRITE_CONFIG(0x0D) command in the driver changed from
* scatter/gather list mode to direct pointer mode..
* Fixed bug of undesirably detecting HP onboard controllers which
* are disabled.
*
* Version 1.12 (Sep 21, 2000)
*
* I. Changes have been made for Dynamic DMA mapping in IA64 platform.
* To enable all these changes define M_RD_DYNAMIC_DMA_SUPPORT in megaraid.h
* II. Got rid of windows mode comments
* III. Removed unwanted code segments
* IV. Fixed bug of HP onboard controller information (commented with
* MEGA_HP_FIX)
*
* Version 1a12
* I. reboot notifier and new ioctl changes ported from 1c09
*
* Version 1b12
* I. Changes in new ioctl interface routines ( Nov 06, 2000 )
*
* Version 1c12
* I. Changes in new ioctl interface routines ( Nov 07, 2000 )
*
* Version 1d12
* I. Compilation error under kernel 2.4.0 for 32-bit machine in mega_ioctl
*
* Version 1e12, 1f12
* 1. Fixes for pci_map_single, pci_alloc_consistent along with mailbox
* alignment
*
* Version 1.13beta
* Added Support for Full 64bit address space support. If firmware
* supports 64bit, it goes to 64 bit mode even on x86 32bit
* systems. Data Corruption Issues while running on test9 kernel
* on IA64 systems. This issue not seen on test11 on x86 system
*
* Version 1.13c
* 1. Resolved Memory Leak when using M_RD_IOCTL_CMD interface
* 2. Resolved Queuing problem when MailBox Blocks
* 3. Added unregister_reboot_notifier support
*
* Version 1.13d
* Experimental changes in interfacing with the controller in ISR
*
* Version 1.13e
* Fixed Broken 2.2.XX compilation changes + misc changes
*
* Version 1.13f to 1.13i
* misc changes + code clean up
* Cleaned up the ioctl code and added set_mbox_xfer_addr()
* Support for START_DEV (6)
*
* Version 1.13j
* Moved some code to megaraid.h file, replaced some hard coded values
* with respective macros. Changed some functions to static
*
* Version 1.13k
* Only some idendation correction to 1.13j
*
* Version 1.13l , 1.13m, 1.13n, 1.13o
* Minor Identation changes + misc changes
*
* Version 1.13q
* Paded the new uioctl_t MIMD structure for maintaining alignment
* and size across 32 / 64 bit platforms
* Changed the way MIMD IOCTL interface used virt_to_bus() to use pci
* memory location
*
* Version 1.13r
* 2.4.xx SCSI Changes.
*
* Version 1.13s
* Stats counter fixes
* Temporary fix for some 64 bit firmwares in 2.4.XX kernels
*
* Version 1.13t
* Support for 64bit version of READ/WRITE/VIEW DISK CONFIG
*
* Version 1.14
* Did away with MEGADEV_IOCTL flag. It is now standard part of driver
* without need for a special #define flag
* Disabled old scsi ioctl path for kernel versions > 2.3.xx. This is due
* to the nature in which the new scsi code queues a new scsi command to
* controller during SCSI IO Completion
* Driver now checks for sub-system vendor id before taking ownership of
* the controller
*
* Version 1.14a
* Added Host re-ordering
*
* Version 1.14b
* Corrected some issue which caused the older cards not to work
*
* Version 1.14c
* IOCTL changes for not handling the non-64bit firmwares under 2.4.XX
* kernel
*
* Version 1.14d
* Fixed Various MIMD Synchronization Issues
*
* Version 1.14e
* Fixed the error handling during card initialization
*
* Version 1.14f
* Multiple invocations of mimd phase I ioctl stalls the cpu. Replaced
* spinlock with semaphore(mutex)
*
* Version 1.14g
* Fixed running out of scbs issues while running MIMD apps under heavy IO
*
* Version 1.14g-ac - 02/03/01
* Reformatted to Linux format so I could compare to old one and cross
* check bug fixes
* Re fixed the assorted missing 'static' cases
* Removed some unneeded version checks
* Cleaned up some of the VERSION checks in the code
* Left 2.0 support but removed 2.1.x support.
* Collected much of the compat glue into one spot
*
* Version 1.14g-ac2 - 22/03/01
* Fixed a non obvious dereference after free in the driver unload path
*
* Version 1.14i
* changes for making 32bit application run on IA64
*
* Version 1.14j
* Tue Mar 13 14:27:54 EST 2001 - AM
* Changes made in the driver to be able to run applications if the
* system has memory >4GB.
*
*
* Version 1.14k
* Thu Mar 15 18:38:11 EST 2001 - AM
*
* Firmware version check removed if subsysid==0x1111 and
* subsysvid==0x1111, since its not yet initialized.
*
* changes made to correctly calculate the base in mega_findCard.
*
* Driver informational messages now appear on the console as well as
* with dmesg
*
* Older ioctl interface is returned failure on newer(2.4.xx) kernels.
*
* Inclusion of "modversions.h" is still a debatable question. It is
* included anyway with this release.
*
* Version 1.14l
* Mon Mar 19 17:39:46 EST 2001 - AM
*
* Assorted changes to remove compilation error in 1.14k when compiled
* with kernel < 2.4.0
*
* Version 1.14m
* Tue Mar 27 12:09:22 EST 2001 - AM
*
* Added support for extended CDBs ( > 10 bytes ) and OBDR ( One Button
* Disaster Recovery ) feature.
*
*
* Version 1.14n
* Tue Apr 10 14:28:13 EDT 2001 - AM
*
* "modeversions.h" is no longer included in the code.
* 2.4.xx style mutex initialization used for older kernels also
*
* Version 1.14o
* Wed Apr 18 17:47:26 EDT 2001 - PJ
*
* Before returning status for 'inquiry', we first check if request buffer
* is SG list, and then return appropriate status
*
* Version 1.14p
* Wed Apr 25 13:44:48 EDT 2001 - PJ
*
* SCSI result made appropriate in case of check conditions for extended
* passthru commands
*
* Do not support lun >7 for physically accessed devices
*
*
* Version 1.15
* Thu Apr 19 09:38:38 EDT 2001 - AM
*
* 1.14l rollover to 1.15 - merged with main trunk after 1.15d
*
* Version 1.15b
* Wed May 16 20:10:01 EDT 2001 - AM
*
* "modeversions.h" is no longer included in the code.
* 2.4.xx style mutex initialization used for older kernels also
* Brought in-sync with Alan's changes in 2.4.4
* Note: 1.15a is on OBDR branch(main trunk), and is not merged with yet.
*
* Version 1.15c
* Mon May 21 23:10:42 EDT 2001 - AM
*
* ioctl interface uses 2.4.x conforming pci dma calls
* similar calls used for older kernels
*
* Version 1.15d
* Wed May 30 17:30:41 EDT 2001 - AM
*
* NULL is not a valid first argument for pci_alloc_consistent() on
* IA64(2.4.3-2.10.1). Code shuffling done in ioctl interface to get
* "pci_dev" before making calls to pci interface routines.
*
* Version 1.16pre
* Fri Jun 1 19:40:48 EDT 2001 - AM
*
* 1.14p and 1.15d merged
* ROMB support added
*
* Version 1.16-pre1
* Mon Jun 4 15:01:01 EDT 2001 - AM
*
* Non-ROMB firmware do no DMA support 0xA9 command. Value 0xFF
* (all channels are raid ) is chosen for those firmware.
*
* Version 1.16-pre2
* Mon Jun 11 18:15:31 EDT 2001 - AM
*
* Changes for boot from any logical drive
*
* Version 1.16
* Tue Jun 26 18:07:02 EDT 2001 - AM
*
* branched at 1.14p
*
* Check added for HP 1M/2M controllers if having firmware H.01.07 or
* H.01.08. If found, disable 64 bit support since these firmware have
* limitations for 64 bit addressing
*
*
* Version 1.17
* Thu Jul 12 11:14:09 EDT 2001 - AM
*
* 1.16pre2 and 1.16 merged.
*
* init_MUTEX and init_MUTEX_LOCKED are defined in 2.2.19. Pre-processor
* statements are added for them
*
* Linus's 2.4.7pre3 kernel introduces a new field 'max_sectors' in Scsi_Host
* structure, to improve IO performance.
*
*
* Version 1.17a
* Fri Jul 13 18:44:01 EDT 2001 - AM
*
* Starting from kernel 2.4.x, LUN is not < 8 - following SCSI-III. So to have
* our current formula working to calculate logical drive number, return
* failure for LUN > 7
*
* Version 1.17a-ac
* Mon Aug 6 14:59:29 BST 2001 - "Michael Johnson" <johnsom@home.com>
*
* Make the HP print formatting and check for buggy firmware runtime not
* ifdef dependant.
*
* BUGS:
* Some older 2.1 kernels (eg. 2.1.90) have a bug in pci.c that
* fails to detect the controller as a pci device on the system.
*
* Timeout period for upper scsi layer, i.e. SD_TIMEOUT in
* /drivers/scsi/sd.c, is too short for this controller. SD_TIMEOUT
* value must be increased to (30 * HZ) otherwise false timeouts
* will occur in the upper layer.
*
* Never set skip_id. The existing PCI code the megaraid uses fails
* to properly check the vendor subid in some cases. Setting this then
* makes it steal other i960's and crashes some boxes
*
* Far too many ifdefs for versions.
*
*===================================================================*/
#include <linux/config.h>
#include <linux/version.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/ioport.h>
#include <linux/fcntl.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/proc_fs.h>
#include <linux/blk.h>
#include <linux/wait.h>
#include <linux/tqueue.h>
#include <linux/interrupt.h>
#include <linux/mm.h>
#include <asm/pgtable.h>
#include <linux/sched.h>
#include <linux/stat.h>
#include <linux/slab.h> /* for kmalloc() */
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,0) /* 0x20100 */
#include <linux/bios32.h>
#else
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0) /* 0x20300 */
#include <asm/spinlock.h>
#else
#include <linux/spinlock.h>
#endif
#endif
#include <asm/io.h>
#include <asm/irq.h>
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,0,24) /* 0x020024 */
#include <asm/uaccess.h>
#endif
/*
* These header files are required for Shutdown Notification routines
*/
#include <linux/notifier.h>
#include <linux/reboot.h>
#include <linux/init.h>
#include "sd.h"
#include "scsi.h"
#include "hosts.h"
#include "megaraid.h"
/*
*================================================================
* #Defines
*================================================================
*/
#define MAX_SERBUF 160
#define COM_BASE 0x2f8
static ulong RDINDOOR (mega_host_config * megaCfg)
{
return readl (megaCfg->base + 0x20);
}
static void WRINDOOR (mega_host_config * megaCfg, ulong value)
{
writel (value, megaCfg->base + 0x20);
}
static ulong RDOUTDOOR (mega_host_config * megaCfg)
{
return readl (megaCfg->base + 0x2C);
}
static void WROUTDOOR (mega_host_config * megaCfg, ulong value)
{
writel (value, megaCfg->base + 0x2C);
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0) /* 0x020200 */
#include <linux/smp.h>
#define cpuid smp_processor_id()
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,4,4)
#define scsi_set_pci_device(x,y)
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0) /* 0x020400 */
/*
* Linux 2.4 and higher
*
* No driver private lock
* Use the io_request_lock not cli/sti
* queue task is a simple api without irq forms
*/
MODULE_AUTHOR ("American Megatrends Inc.");
MODULE_DESCRIPTION ("AMI MegaRAID driver");
#define DRIVER_LOCK_T
#define DRIVER_LOCK_INIT(p)
#define DRIVER_LOCK(p)
#define DRIVER_UNLOCK(p)
#define IO_LOCK_T unsigned long io_flags = 0;
#define IO_LOCK spin_lock_irqsave(&io_request_lock,io_flags);
#define IO_UNLOCK spin_unlock_irqrestore(&io_request_lock,io_flags);
#define queue_task_irq(a,b) queue_task(a,b)
#define queue_task_irq_off(a,b) queue_task(a,b)
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0) /* 0x020200 */
/*
* Linux 2.2 and higher
*
* No driver private lock
* Use the io_request_lock not cli/sti
* No pci region api
* queue_task is now a single simple API
*/
static char kernel_version[] = UTS_RELEASE;
MODULE_AUTHOR ("American Megatrends Inc.");
MODULE_DESCRIPTION ("AMI MegaRAID driver");
#define DRIVER_LOCK_T
#define DRIVER_LOCK_INIT(p)
#define DRIVER_LOCK(p)
#define DRIVER_UNLOCK(p)
#define IO_LOCK_T unsigned long io_flags = 0;
#define IO_LOCK spin_lock_irqsave(&io_request_lock,io_flags);
#define IO_UNLOCK spin_unlock_irqrestore(&io_request_lock,io_flags);
#define pci_free_consistent(a,b,c,d)
#define pci_unmap_single(a,b,c,d)
#define pci_enable_device(x) (0)
#define queue_task_irq(a,b) queue_task(a,b)
#define queue_task_irq_off(a,b) queue_task(a,b)
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,2,19) /* 0x020219 */
#define init_MUTEX_LOCKED(x) (*(x)=MUTEX_LOCKED)
#define init_MUTEX(x) (*(x)=MUTEX)
#define DECLARE_WAIT_QUEUE_HEAD(x) struct wait_queue *x = NULL
#endif
#else
/*
* Linux 2.0 macros. Here we have to provide some of our own
* functionality. We also only work little endian 32bit.
* Again no pci_alloc/free api
* IO_LOCK/IO_LOCK_T were never used in 2.0 so now are empty
*/
#define cpuid 0
#define DRIVER_LOCK_T long cpu_flags;
#define DRIVER_LOCK_INIT(p)
#define DRIVER_LOCK(p) \
save_flags(cpu_flags); \
cli();
#define DRIVER_UNLOCK(p) \
restore_flags(cpu_flags);
#define IO_LOCK_T
#define IO_LOCK(p)
#define IO_UNLOCK(p)
#define le32_to_cpu(x) (x)
#define cpu_to_le32(x) (x)
#define pci_free_consistent(a,b,c,d)
#define pci_unmap_single(a,b,c,d)
#define init_MUTEX_LOCKED(x) (*(x)=MUTEX_LOCKED)
#define init_MUTEX(x) (*(x)=MUTEX)
#define pci_enable_device(x) (0)
/*
* 2.0 lacks spinlocks, iounmap/ioremap
*/
#define ioremap vremap
#define iounmap vfree
/* simulate spin locks */
typedef struct {
volatile char lock;
} spinlock_t;
#define spin_lock_init(x) { (x)->lock = 0;}
#define spin_lock_irqsave(x,flags) { while ((x)->lock) barrier();\
(x)->lock=1; save_flags(flags);\
cli();}
#define spin_unlock_irqrestore(x,flags) { (x)->lock=0; restore_flags(flags);}
#define DECLARE_WAIT_QUEUE_HEAD(x) struct wait_queue *x = NULL
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0) /* 0x020400 */
#define dma_alloc_consistent pci_alloc_consistent
#define dma_free_consistent pci_free_consistent
#else
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,2,19) /* 0x020219 */
typedef unsigned long dma_addr_t;
#endif
void *dma_alloc_consistent(void *, size_t, dma_addr_t *);
void dma_free_consistent(void *, size_t, void *, dma_addr_t);
int mega_get_order(int);
int pow_2(int);
#endif
/* set SERDEBUG to 1 to enable serial debugging */
#define SERDEBUG 0
#if SERDEBUG
static void ser_init (void);
static void ser_puts (char *str);
static void ser_putc (char c);
static int ser_printk (const char *fmt, ...);
#endif
#ifdef CONFIG_PROC_FS
#define COPY_BACK if (offset > megaCfg->procidx) { \
*eof = TRUE; \
megaCfg->procidx = 0; \
megaCfg->procbuf[0] = 0; \
return 0;} \
if ((count + offset) > megaCfg->procidx) { \
count = megaCfg->procidx - offset; \
*eof = TRUE; } \
memcpy(page, &megaCfg->procbuf[offset], count); \
megaCfg->procidx = 0; \
megaCfg->procbuf[0] = 0;
#endif
/*
* ================================================================
* Global variables
*================================================================
*/
/* Use "megaraid=skipXX" as LILO option to prohibit driver from scanning
XX scsi id on each channel. Used for Madrona motherboard, where SAF_TE
processor id cannot be scanned */
static char *megaraid;
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,0) /* 0x20100 */
#ifdef MODULE
MODULE_PARM (megaraid, "s");
#endif
#endif
static int skip_id = -1;
static int numCtlrs = 0;
static mega_host_config *megaCtlrs[FC_MAX_CHANNELS] = { 0 };
static struct proc_dir_entry *mega_proc_dir_entry;
#if DEBUG
static u32 maxCmdTime = 0;
#endif
static mega_scb *pLastScb = NULL;
static struct notifier_block mega_notifier = {
megaraid_reboot_notify,
NULL,
0
};
/* For controller re-ordering */
struct mega_hbas mega_hbas[MAX_CONTROLLERS];
/*
* The File Operations structure for the serial/ioctl interface of the driver
*/
/* For controller re-ordering */
static struct file_operations megadev_fops = {
ioctl:megadev_ioctl_entry,
open:megadev_open,
release:megadev_close,
};
/*
* Array to structures for storing the information about the controllers. This
* information is sent to the user level applications, when they do an ioctl
* for this information.
*/
static struct mcontroller mcontroller[MAX_CONTROLLERS];
/* The current driver version */
static u32 driver_ver = 117;
/* major number used by the device for character interface */
static int major;
static struct semaphore mimd_ioctl_sem;
static struct semaphore mimd_entry_mtx;
#if SERDEBUG
volatile static spinlock_t serial_lock;
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,4,0) /* 0x20300 */
static struct proc_dir_entry proc_scsi_megaraid = {
PROC_SCSI_MEGARAID, 8, "megaraid",
S_IFDIR | S_IRUGO | S_IXUGO, 2
};
#endif
#ifdef CONFIG_PROC_FS
extern struct proc_dir_entry proc_root;
#endif
static char mega_ch_class; /* channels are raid or scsi */
#define IS_RAID_CH(ch) ( (mega_ch_class >> (ch)) & 0x01 )
#if SERDEBUG
static char strbuf[MAX_SERBUF + 1];
static void ser_init (void)
{
unsigned port = COM_BASE;
outb (0x80, port + 3);
outb (0, port + 1);
/* 9600 Baud, if 19200: outb(6,port) */
outb (12, port);
outb (3, port + 3);
outb (0, port + 1);
}
static void ser_puts (char *str)
{
char *ptr;
ser_init ();
for (ptr = str; *ptr; ++ptr)
ser_putc (*ptr);
}
static void ser_putc (char c)
{
unsigned port = COM_BASE;
while ((inb (port + 5) & 0x20) == 0) ;
outb (c, port);
if (c == 0x0a) {
while ((inb (port + 5) & 0x20) == 0) ;
outb (0x0d, port);
}
}
static int ser_printk (const char *fmt, ...)
{
va_list args;
int i;
long flags;
spin_lock_irqsave (&serial_lock, flags);
va_start (args, fmt);
i = vsprintf (strbuf, fmt, args);
ser_puts (strbuf);
va_end (args);
spin_unlock_irqrestore (&serial_lock, flags);
return i;
}
#define TRACE(a) { ser_printk a;}
#else
#define TRACE(A)
#endif
#define TRACE1(a)
static void callDone (Scsi_Cmnd * SCpnt)
{
if (SCpnt->result) {
TRACE (("*** %.08lx %.02x <%d.%d.%d> = %x\n",
SCpnt->serial_number, SCpnt->cmnd[0], SCpnt->channel,
SCpnt->target, SCpnt->lun, SCpnt->result));
}
SCpnt->scsi_done (SCpnt);
}
/*-------------------------------------------------------------------------
*
* Local functions
*
*-------------------------------------------------------------------------*/
/*=======================
* Free a SCB structure
*=======================
*/
static void mega_freeSCB (mega_host_config * megaCfg, mega_scb * pScb)
{
mega_scb *pScbtmp;
if ((pScb == NULL) || (pScb->idx >= 0xFE)) {
return;
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
switch (pScb->dma_type) {
case M_RD_DMA_TYPE_NONE:
break;
case M_RD_PTHRU_WITH_BULK_DATA:
pci_unmap_single (megaCfg->dev, pScb->dma_h_bulkdata,
pScb->pthru->dataxferlen,
pScb->dma_direction);
break;
case M_RD_EPTHRU_WITH_BULK_DATA:
pci_unmap_single (megaCfg->dev, pScb->dma_h_bulkdata,
pScb->epthru->dataxferlen,
pScb->dma_direction);
break;
case M_RD_PTHRU_WITH_SGLIST:
{
int count;
for (count = 0; count < pScb->sglist_count; count++) {
pci_unmap_single (megaCfg->dev,
pScb->dma_h_sglist[count],
pScb->sgList[count].length,
pScb->dma_direction);
}
break;
}
case M_RD_BULK_DATA_ONLY:
pci_unmap_single (megaCfg->dev,
pScb->dma_h_bulkdata,
pScb->iDataSize, pScb->dma_direction);
break;
case M_RD_SGLIST_ONLY:
pci_unmap_sg (megaCfg->dev,
pScb->SCpnt->request_buffer,
pScb->SCpnt->use_sg, pScb->dma_direction);
break;
default:
break;
}
#endif
/* Unlink from pending queue */
if (pScb == megaCfg->qPendingH) {
if (megaCfg->qPendingH == megaCfg->qPendingT)
megaCfg->qPendingH = megaCfg->qPendingT = NULL;
else
megaCfg->qPendingH = megaCfg->qPendingH->next;
megaCfg->qPcnt--;
} else {
for (pScbtmp = megaCfg->qPendingH; pScbtmp;
pScbtmp = pScbtmp->next) {
if (pScbtmp->next == pScb) {
pScbtmp->next = pScb->next;
if (pScb == megaCfg->qPendingT) {
megaCfg->qPendingT = pScbtmp;
}
megaCfg->qPcnt--;
break;
}
}
}
/* Link back into free list */
pScb->state = SCB_FREE;
pScb->SCpnt = NULL;
if (megaCfg->qFreeH == (mega_scb *) NULL) {
megaCfg->qFreeH = megaCfg->qFreeT = pScb;
} else {
megaCfg->qFreeT->next = pScb;
megaCfg->qFreeT = pScb;
}
megaCfg->qFreeT->next = NULL;
megaCfg->qFcnt++;
}
/*===========================
* Allocate a SCB structure
*===========================
*/
static mega_scb *mega_allocateSCB (mega_host_config * megaCfg, Scsi_Cmnd * SCpnt)
{
mega_scb *pScb;
/* Unlink command from Free List */
if ((pScb = megaCfg->qFreeH) != NULL) {
megaCfg->qFreeH = pScb->next;
megaCfg->qFcnt--;
pScb->isrcount = jiffies;
pScb->next = NULL;
pScb->state = SCB_ACTIVE;
pScb->SCpnt = SCpnt;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
pScb->dma_type = M_RD_DMA_TYPE_NONE;
#endif
return pScb;
}
printk (KERN_WARNING "Megaraid: Could not allocate free SCB!!!\n");
return NULL;
}
/* Run through the list of completed requests and finish it */
static void mega_rundoneq (mega_host_config * megaCfg)
{
Scsi_Cmnd *SCpnt;
while ((SCpnt = megaCfg->qCompletedH) != NULL) {
megaCfg->qCompletedH = (Scsi_Cmnd *) SCpnt->host_scribble;
megaCfg->qCcnt--;
SCpnt->host_scribble = (unsigned char *) NULL; /* XC : sep 14 */
/* Callback */
callDone (SCpnt);
}
megaCfg->qCompletedH = megaCfg->qCompletedT = NULL;
}
/*
* Runs through the list of pending requests
* Assumes that mega_lock spin_lock has been acquired.
*/
static int mega_runpendq (mega_host_config * megaCfg)
{
mega_scb *pScb;
int rc;
/* Issue any pending commands to the card */
for (pScb = megaCfg->qPendingH; pScb; pScb = pScb->next) {
if (pScb->state == SCB_ACTIVE) {
if ((rc =
megaIssueCmd (megaCfg, pScb->mboxData, pScb, 1)) == -1)
return rc;
}
}
return 0;
}
/* Add command to the list of completed requests */
static void mega_cmd_done (mega_host_config * megaCfg, mega_scb * pScb, int status)
{
int islogical;
Scsi_Cmnd *SCpnt;
mega_passthru *pthru;
mega_ext_passthru *epthru;
mega_mailbox *mbox;
struct scatterlist *sgList;
u8 c;
if (pScb == NULL) {
TRACE (("NULL pScb in mega_cmd_done!"));
printk(KERN_CRIT "NULL pScb in mega_cmd_done!");
}
SCpnt = pScb->SCpnt;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
pthru = pScb->pthru;
epthru = pScb->epthru;
#else
pthru = &pScb->pthru;
epthru = &pScb->epthru;
#endif
mbox = (mega_mailbox *) & pScb->mboxData;
if (SCpnt == NULL) {
TRACE (("NULL SCpnt in mega_cmd_done!"));
TRACE (("pScb->idx = ", pScb->idx));
TRACE (("pScb->state = ", pScb->state));
TRACE (("pScb->state = ", pScb->state));
panic(KERN_ERR "megaraid:Problem...!\n");
}
islogical = (SCpnt->channel == megaCfg->host->max_channel);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
/* Special Case to handle PassThrough->XferAddrress > 4GB */
switch (SCpnt->cmnd[0]) {
case INQUIRY:
case READ_CAPACITY:
memcpy (SCpnt->request_buffer,
pScb->bounce_buffer, SCpnt->request_bufflen);
break;
}
#endif
mega_freeSCB (megaCfg, pScb);
/*
* Do not return the presence of hard disk on the channel so, inquiry
* sent, and returned data==hard disk or removable hard disk and not
* logical, request should return failure! - PJ
*/
#if 0
if (SCpnt->cmnd[0] == INQUIRY && ((((u_char *) SCpnt->request_buffer)[0] & 0x1F) == TYPE_DISK) && !islogical) {
status = 0xF0;
}
#endif
if (SCpnt->cmnd[0] == INQUIRY && !islogical) {
if ( SCpnt->use_sg ) {
sgList = (struct scatterlist *)SCpnt->request_buffer;
memcpy(&c, sgList[0].address, 0x1);
} else {
memcpy(&c, SCpnt->request_buffer, 0x1);
}
#if 0
if( (c & 0x1F ) == TYPE_DISK ) {
status = 0xF0;
}
#endif
if( IS_RAID_CH(SCpnt->channel) && ((c & 0x1F ) == TYPE_DISK) ) {
status = 0xF0;
}
}
/* clear result; otherwise, success returns corrupt value */
SCpnt->result = 0;
if ((SCpnt->cmnd[0] & M_RD_IOCTL_CMD)) { /* i.e. ioctl cmd such as M_RD_IOCTL_CMD, M_RD_IOCTL_CMD_NEW of megamgr */
switch (status) {
case 2:
case 0xF0:
case 0xF4:
SCpnt->result = (DID_BAD_TARGET << 16) | status;
break;
default:
SCpnt->result |= status;
} /*end of switch */
} else {
/* Convert MegaRAID status to Linux error code */
switch (status) {
case 0x00: /* SUCCESS , i.e. SCSI_STATUS_GOOD */
SCpnt->result |= (DID_OK << 16);
break;
case 0x02: /* ERROR_ABORTED, i.e. SCSI_STATUS_CHECK_CONDITION */
/*set sense_buffer and result fields */
if (mbox->cmd == MEGA_MBOXCMD_PASSTHRU) {
memcpy (SCpnt->sense_buffer, pthru->reqsensearea, 14);
} else if (mbox->cmd == MEGA_MBOXCMD_EXTPASSTHRU) {
SCpnt->result = (DRIVER_SENSE << 24) | (DID_OK << 16) | (CHECK_CONDITION < 1);
memcpy(
SCpnt->sense_buffer,
epthru->reqsensearea, 14
);
SCpnt->result = (DRIVER_SENSE << 24) | (DID_OK << 16) | (CHECK_CONDITION < 1);
/*SCpnt->result =
(DRIVER_SENSE << 24) |
(DID_ERROR << 16) | status;*/
} else {
SCpnt->sense_buffer[0] = 0x70;
SCpnt->sense_buffer[2] = ABORTED_COMMAND;
SCpnt->result |= (CHECK_CONDITION << 1);
}
break;
case 0x08: /* ERR_DEST_DRIVE_FAILED, i.e. SCSI_STATUS_BUSY */
SCpnt->result |= (DID_BUS_BUSY << 16) | status;
break;
default:
SCpnt->result |= (DID_BAD_TARGET << 16) | status;
break;
}
}
/* Add Scsi_Command to end of completed queue */
if (megaCfg->qCompletedH == NULL) {
megaCfg->qCompletedH = megaCfg->qCompletedT = SCpnt;
} else {
megaCfg->qCompletedT->host_scribble = (unsigned char *) SCpnt;
megaCfg->qCompletedT = SCpnt;
}
megaCfg->qCompletedT->host_scribble = (unsigned char *) NULL;
megaCfg->qCcnt++;
}
/*-------------------------------------------------------------------
*
* Build a SCB from a Scsi_Cmnd
*
* Returns a SCB pointer, or NULL
* If NULL is returned, the scsi_done function MUST have been called
*
*-------------------------------------------------------------------*/
static mega_scb *mega_build_cmd (mega_host_config * megaCfg, Scsi_Cmnd * SCpnt)
{
mega_scb *pScb;
mega_mailbox *mbox;
mega_passthru *pthru;
mega_ext_passthru *epthru;
long seg;
char islogical;
char lun = SCpnt->lun;
if ((SCpnt->cmnd[0] == MEGADEVIOC))
return megadev_doioctl (megaCfg, SCpnt);
if ((SCpnt->cmnd[0] == M_RD_IOCTL_CMD)
|| (SCpnt->cmnd[0] == M_RD_IOCTL_CMD_NEW))
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0)
return mega_ioctl (megaCfg, SCpnt); /* Handle IOCTL command */
#else
{
printk(KERN_WARNING "megaraid ioctl: older interface - "
"not supported.\n");
return NULL;
}
#endif
islogical = (IS_RAID_CH(SCpnt->channel) && /* virtual ch is raid - AM */
(SCpnt->channel == megaCfg->host->max_channel));
if ( ! megaCfg->support_ext_cdb ) {
if (!islogical && lun != 0) {
SCpnt->result = (DID_BAD_TARGET << 16);
callDone (SCpnt);
return NULL;
}
}
if (!islogical && SCpnt->target == skip_id) {
SCpnt->result = (DID_BAD_TARGET << 16);
callDone (SCpnt);
return NULL;
}
/*
* Return error for LUN > 7. The way we calculate logical drive number
* requires it to be so.
*/
if( lun > 7 ) {
SCpnt->result = (DID_BAD_TARGET << 16);
callDone (SCpnt);
return NULL;
}
if (islogical) {
lun = (SCpnt->target * 8) + lun;
if(lun >= megaCfg->numldrv ) {
SCpnt->result = (DID_BAD_TARGET << 16);
callDone (SCpnt);
return NULL;
}
/*
* If we have a logical drive with boot enabled, project it first
*/
if( megaCfg->boot_ldrv_enabled ) {
if( lun == 0 ) {
lun = megaCfg->boot_ldrv;
}
else {
if( lun <= megaCfg->boot_ldrv ) {
lun--;
}
}
}
}
/*-----------------------------------------------------
*
* Logical drive commands
*
*-----------------------------------------------------*/
if (islogical) {
switch (SCpnt->cmnd[0]) {
case TEST_UNIT_READY:
memset (SCpnt->request_buffer, 0, SCpnt->request_bufflen);
SCpnt->result = (DID_OK << 16);
callDone (SCpnt);
return NULL;
case MODE_SENSE:
memset (SCpnt->request_buffer, 0, SCpnt->cmnd[4]);
SCpnt->result = (DID_OK << 16);
callDone (SCpnt);
return NULL;
case READ_CAPACITY:
case INQUIRY:
/* Allocate a SCB and initialize passthru */
if ((pScb = mega_allocateSCB (megaCfg, SCpnt)) == NULL) {
SCpnt->result = (DID_ERROR << 16);
callDone (SCpnt);
return NULL;
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
pthru = pScb->pthru;
#else
pthru = &pScb->pthru;
#endif
mbox = (mega_mailbox *) & pScb->mboxData;
memset (mbox, 0, sizeof (pScb->mboxData));
memset (pthru, 0, sizeof (mega_passthru));
pthru->timeout = 0;
pthru->ars = 1;
pthru->reqsenselen = 14;
pthru->islogical = 1;
pthru->logdrv = lun;
pthru->cdblen = SCpnt->cmd_len;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
/*Not sure about the direction */
pScb->dma_direction = PCI_DMA_BIDIRECTIONAL;
pScb->dma_type = M_RD_PTHRU_WITH_BULK_DATA;
#if 0
/* Normal Code w/o the need for bounce buffer */
pScb->dma_h_bulkdata
= pci_map_single (megaCfg->dev,
SCpnt->request_buffer,
SCpnt->request_bufflen,
pScb->dma_direction);
pthru->dataxferaddr = pScb->dma_h_bulkdata;
#else
/* Special Code to use bounce buffer for READ_CAPA/INQ */
pthru->dataxferaddr = pScb->dma_bounce_buffer;
pScb->dma_type = M_RD_DMA_TYPE_NONE;
#endif
#else
pthru->dataxferaddr =
virt_to_bus (SCpnt->request_buffer);
#endif
pthru->dataxferlen = SCpnt->request_bufflen;
memcpy (pthru->cdb, SCpnt->cmnd, SCpnt->cmd_len);
/* Initialize mailbox area */
mbox->cmd = MEGA_MBOXCMD_PASSTHRU;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
mbox->xferaddr = pScb->dma_passthruhandle64;
TRACE1 (("M_RD_PTHRU_WITH_BULK_DATA Enabled \n"));
#else
mbox->xferaddr = virt_to_bus (pthru);
#endif
return pScb;
case READ_6:
case WRITE_6:
case READ_10:
case WRITE_10:
/* Allocate a SCB and initialize mailbox */
if ((pScb = mega_allocateSCB (megaCfg, SCpnt)) == NULL) {
SCpnt->result = (DID_ERROR << 16);
callDone (SCpnt);
return NULL;
}
mbox = (mega_mailbox *) & pScb->mboxData;
memset (mbox, 0, sizeof (pScb->mboxData));
mbox->logdrv = lun;
if (megaCfg->flag & BOARD_64BIT) {
mbox->cmd = (*SCpnt->cmnd == READ_6
|| *SCpnt->cmnd ==
READ_10) ? MEGA_MBOXCMD_LREAD64 :
MEGA_MBOXCMD_LWRITE64;
} else {
mbox->cmd = (*SCpnt->cmnd == READ_6
|| *SCpnt->cmnd ==
READ_10) ? MEGA_MBOXCMD_LREAD :
MEGA_MBOXCMD_LWRITE;
}
/* 6-byte */
if (*SCpnt->cmnd == READ_6 || *SCpnt->cmnd == WRITE_6) {
mbox->numsectors = (u32) SCpnt->cmnd[4];
mbox->lba =
((u32) SCpnt->cmnd[1] << 16) |
((u32) SCpnt->cmnd[2] << 8) |
(u32) SCpnt->cmnd[3];
mbox->lba &= 0x1FFFFF;
if (*SCpnt->cmnd == READ_6) {
megaCfg->nReads[(int) lun]++;
megaCfg->nReadBlocks[(int) lun] +=
mbox->numsectors;
} else {
megaCfg->nWrites[(int) lun]++;
megaCfg->nWriteBlocks[(int) lun] +=
mbox->numsectors;
}
}
/* 10-byte */
if (*SCpnt->cmnd == READ_10 || *SCpnt->cmnd == WRITE_10) {
mbox->numsectors =
(u32) SCpnt->cmnd[8] |
((u32) SCpnt->cmnd[7] << 8);
mbox->lba =
((u32) SCpnt->cmnd[2] << 24) |
((u32) SCpnt->cmnd[3] << 16) |
((u32) SCpnt->cmnd[4] << 8) |
(u32) SCpnt->cmnd[5];
if (*SCpnt->cmnd == READ_10) {
megaCfg->nReads[(int) lun]++;
megaCfg->nReadBlocks[(int) lun] +=
mbox->numsectors;
} else {
megaCfg->nWrites[(int) lun]++;
megaCfg->nWriteBlocks[(int) lun] +=
mbox->numsectors;
}
}
/* 12-byte */
if (*SCpnt->cmnd == READ_12 || *SCpnt->cmnd == WRITE_12) {
mbox->lba =
((u32) SCpnt->cmnd[2] << 24) |
((u32) SCpnt->cmnd[3] << 16) |
((u32) SCpnt->cmnd[4] << 8) |
(u32) SCpnt->cmnd[5];
mbox->numsectors =
((u32) SCpnt->cmnd[6] << 24) |
((u32) SCpnt->cmnd[7] << 16) |
((u32) SCpnt->cmnd[8] << 8) |
(u32) SCpnt->cmnd[9];
if (*SCpnt->cmnd == READ_12) {
megaCfg->nReads[(int) lun]++;
megaCfg->nReadBlocks[(int) lun] +=
mbox->numsectors;
} else {
megaCfg->nWrites[(int) lun]++;
megaCfg->nWriteBlocks[(int) lun] +=
mbox->numsectors;
}
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
if (*SCpnt->cmnd == READ_6 || *SCpnt->cmnd == READ_10
|| *SCpnt->cmnd == READ_12) {
pScb->dma_direction = PCI_DMA_FROMDEVICE;
} else { /*WRITE_6 or WRITE_10 */
pScb->dma_direction = PCI_DMA_TODEVICE;
}
#endif
/* Calculate Scatter-Gather info */
mbox->numsgelements = mega_build_sglist (megaCfg, pScb,
(u32 *)&mbox->xferaddr, (u32 *)&seg);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
pScb->iDataSize = seg;
if (mbox->numsgelements) {
pScb->dma_type = M_RD_SGLIST_ONLY;
TRACE1 (("M_RD_SGLIST_ONLY Enabled \n"));
} else {
pScb->dma_type = M_RD_BULK_DATA_ONLY;
TRACE1 (("M_RD_BULK_DATA_ONLY Enabled \n"));
}
#endif
return pScb;
default:
SCpnt->result = (DID_BAD_TARGET << 16);
callDone (SCpnt);
return NULL;
}
}
/*-----------------------------------------------------
*
* Passthru drive commands
*
*-----------------------------------------------------*/
else {
/* Allocate a SCB and initialize passthru */
if ((pScb = mega_allocateSCB (megaCfg, SCpnt)) == NULL) {
SCpnt->result = (DID_ERROR << 16);
callDone (SCpnt);
return NULL;
}
mbox = (mega_mailbox *) pScb->mboxData;
memset (mbox, 0, sizeof (pScb->mboxData));
if ( megaCfg->support_ext_cdb && SCpnt->cmd_len > 10 ) {
epthru = mega_prepare_extpassthru(megaCfg, pScb, SCpnt);
mbox->cmd = MEGA_MBOXCMD_EXTPASSTHRU;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
mbox->xferaddr = pScb->dma_ext_passthruhandle64;
if(epthru->numsgelements) {
pScb->dma_type = M_RD_PTHRU_WITH_SGLIST;
} else {
pScb->dma_type = M_RD_EPTHRU_WITH_BULK_DATA;
}
#else
mbox->xferaddr = virt_to_bus(epthru);
#endif
}
else {
pthru = mega_prepare_passthru(megaCfg, pScb, SCpnt);
/* Initialize mailbox */
mbox->cmd = MEGA_MBOXCMD_PASSTHRU;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
mbox->xferaddr = pScb->dma_passthruhandle64;
if (pthru->numsgelements) {
pScb->dma_type = M_RD_PTHRU_WITH_SGLIST;
} else {
pScb->dma_type = M_RD_PTHRU_WITH_BULK_DATA;
}
#else
mbox->xferaddr = virt_to_bus(pthru);
#endif
}
return pScb;
}
return NULL;
}
static mega_passthru *
mega_prepare_passthru(mega_host_config *megacfg, mega_scb *scb, Scsi_Cmnd *sc)
{
mega_passthru *pthru;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
pthru = scb->pthru;
#else
pthru = &scb->pthru;
#endif
memset (pthru, 0, sizeof (mega_passthru));
/* set adapter timeout value to 10 min. for tape drive */
/* 0=6sec/1=60sec/2=10min/3=3hrs */
pthru->timeout = 2;
pthru->ars = 1;
pthru->reqsenselen = 14;
pthru->islogical = 0;
pthru->channel = (megacfg->flag & BOARD_40LD) ? 0 : sc->channel;
pthru->target = (megacfg->flag & BOARD_40LD) ?
(sc->channel << 4) | sc->target : sc->target;
pthru->cdblen = sc->cmd_len;
pthru->logdrv = sc->lun;
memcpy (pthru->cdb, sc->cmnd, sc->cmd_len);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
/* Not sure about the direction */
scb->dma_direction = PCI_DMA_BIDIRECTIONAL;
/* Special Code for Handling READ_CAPA/ INQ using bounce buffers */
switch (sc->cmnd[0]) {
case INQUIRY:
case READ_CAPACITY:
pthru->numsgelements = 0;
pthru->dataxferaddr = scb->dma_bounce_buffer;
pthru->dataxferlen = sc->request_bufflen;
break;
default:
pthru->numsgelements =
mega_build_sglist(
megacfg, scb, (u32 *)&pthru->dataxferaddr,
(u32 *)&pthru->dataxferlen
);
break;
}
#else
pthru->numsgelements =
mega_build_sglist(
megacfg, scb, (u32 *)&pthru->dataxferaddr,
(u32 *)&pthru->dataxferlen
);
#endif
return pthru;
}
static mega_ext_passthru *
mega_prepare_extpassthru(mega_host_config *megacfg, mega_scb *scb, Scsi_Cmnd *sc)
{
mega_ext_passthru *epthru;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
epthru = scb->epthru;
#else
epthru = &scb->epthru;
#endif
memset(epthru, 0, sizeof(mega_ext_passthru));
/* set adapter timeout value to 10 min. for tape drive */
/* 0=6sec/1=60sec/2=10min/3=3hrs */
epthru->timeout = 2;
epthru->ars = 1;
epthru->reqsenselen = 14;
epthru->islogical = 0;
epthru->channel = (megacfg->flag & BOARD_40LD) ? 0 : sc->channel;
epthru->target = (megacfg->flag & BOARD_40LD) ?
(sc->channel << 4) | sc->target : sc->target;
epthru->cdblen = sc->cmd_len;
epthru->logdrv = sc->lun;
memcpy(epthru->cdb, sc->cmnd, sc->cmd_len);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
/* Not sure about the direction */
scb->dma_direction = PCI_DMA_BIDIRECTIONAL;
/* Special Code for Handling READ_CAPA/ INQ using bounce buffers */
switch (sc->cmnd[0]) {
case INQUIRY:
case READ_CAPACITY:
epthru->numsgelements = 0;
epthru->dataxferaddr = scb->dma_bounce_buffer;
epthru->dataxferlen = sc->request_bufflen;
break;
default:
epthru->numsgelements =
mega_build_sglist(
megacfg, scb, (u32 *)&epthru->dataxferaddr,
(u32 *)&epthru->dataxferlen
);
break;
}
#else
epthru->numsgelements =
mega_build_sglist(
megacfg, scb, (u32 *)&epthru->dataxferaddr,
(u32 *)&epthru->dataxferlen
);
#endif
return epthru;
}
/* Handle Driver Level IOCTLs
* Return value of 0 indicates this function could not handle , so continue
* processing
*/
static int mega_driver_ioctl (mega_host_config * megaCfg, Scsi_Cmnd * SCpnt)
{
unsigned char *data = (unsigned char *) SCpnt->request_buffer;
mega_driver_info driver_info;
/* If this is not our command dont do anything */
if (SCpnt->cmnd[0] != M_RD_DRIVER_IOCTL_INTERFACE)
return 0;
switch (SCpnt->cmnd[1]) {
case GET_DRIVER_INFO:
if (SCpnt->request_bufflen < sizeof (driver_info)) {
SCpnt->result = DID_BAD_TARGET << 16;
callDone (SCpnt);
return 1;
}
driver_info.size = sizeof (driver_info) - sizeof (int);
driver_info.version = MEGARAID_IOCTL_VERSION;
memcpy (data, &driver_info, sizeof (driver_info));
break;
default:
SCpnt->result = DID_BAD_TARGET << 16;
}
callDone (SCpnt);
return 1;
}
static void inline set_mbox_xfer_addr (mega_host_config * megaCfg, mega_scb * pScb,
mega_ioctl_mbox * mbox, u32 direction)
{
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
switch (direction) {
case TO_DEVICE:
pScb->dma_direction = PCI_DMA_TODEVICE;
break;
case FROM_DEVICE:
pScb->dma_direction = PCI_DMA_FROMDEVICE;
break;
case FROMTO_DEVICE:
pScb->dma_direction = PCI_DMA_BIDIRECTIONAL;
break;
}
pScb->dma_h_bulkdata
= pci_map_single (megaCfg->dev,
pScb->buff_ptr,
pScb->iDataSize, pScb->dma_direction);
mbox->xferaddr = pScb->dma_h_bulkdata;
pScb->dma_type = M_RD_BULK_DATA_ONLY;
TRACE1 (("M_RD_BULK_DATA_ONLY Enabled \n"));
#else
mbox->xferaddr = virt_to_bus (pScb->buff_ptr);
#endif
}
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0)
/*--------------------------------------------------------------------
* build RAID commands for controller, passed down through ioctl()
*--------------------------------------------------------------------*/
static mega_scb *mega_ioctl (mega_host_config * megaCfg, Scsi_Cmnd * SCpnt)
{
mega_scb *pScb;
mega_ioctl_mbox *mbox;
mega_mailbox *mailbox;
mega_passthru *pthru;
u8 *mboxdata;
long seg, i = 0;
unsigned char *data = (unsigned char *) SCpnt->request_buffer;
if ((pScb = mega_allocateSCB (megaCfg, SCpnt)) == NULL) {
SCpnt->result = (DID_ERROR << 16);
callDone (SCpnt);
return NULL;
}
pthru = &pScb->pthru;
mboxdata = (u8 *) & pScb->mboxData;
mbox = (mega_ioctl_mbox *) & pScb->mboxData;
mailbox = (mega_mailbox *) & pScb->mboxData;
memset (mailbox, 0, sizeof (pScb->mboxData));
if (data[0] == 0x03) { /* passthrough command */
unsigned char cdblen = data[2];
memset (pthru, 0, sizeof (mega_passthru));
pthru->islogical = (data[cdblen + 3] & 0x80) ? 1 : 0;
pthru->timeout = data[cdblen + 3] & 0x07;
pthru->reqsenselen = 14;
pthru->ars = (data[cdblen + 3] & 0x08) ? 1 : 0;
pthru->logdrv = data[cdblen + 4];
pthru->channel = data[cdblen + 5];
pthru->target = data[cdblen + 6];
pthru->cdblen = cdblen;
memcpy (pthru->cdb, &data[3], cdblen);
mailbox->cmd = MEGA_MBOXCMD_PASSTHRU;
pthru->numsgelements = mega_build_sglist (megaCfg, pScb,
(u32 *) & pthru->
dataxferaddr,
(u32 *) & pthru->
dataxferlen);
mailbox->xferaddr = virt_to_bus (pthru);
for (i = 0; i < (SCpnt->request_bufflen - cdblen - 7); i++) {
data[i] = data[i + cdblen + 7];
}
return pScb;
}
/* else normal (nonpassthru) command */
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,0,24) /*0x020024 */
/*
*usage of the function copy from user is used in case of data more than
*4KB.This is used only with adapters which supports more than 8 logical
* drives.This feature is disabled on kernels earlier or same as 2.0.36
* as the uaccess.h file is not available with those kernels.
*/
if (SCpnt->cmnd[0] == M_RD_IOCTL_CMD_NEW) {
/* use external data area for large xfers */
/* If cmnd[0] is set to M_RD_IOCTL_CMD_NEW then *
* cmnd[4..7] = external user buffer *
* cmnd[8..11] = length of buffer *
* */
char *user_area = (char *)*((u32*)&SCpnt->cmnd[4]);
u32 xfer_size = *((u32 *) & SCpnt->cmnd[8]);
switch (data[0]) {
case FW_FIRE_WRITE:
case FW_FIRE_FLASH:
if ((ulong) user_area & (PAGE_SIZE - 1)) {
printk
("megaraid:user address not aligned on 4K boundary.Error.\n");
SCpnt->result = (DID_ERROR << 16);
callDone (SCpnt);
return NULL;
}
break;
default:
break;
}
if (!(pScb->buff_ptr = kmalloc (xfer_size, GFP_KERNEL))) {
printk
("megaraid: Insufficient mem for M_RD_IOCTL_CMD_NEW.\n");
SCpnt->result = (DID_ERROR << 16);
callDone (SCpnt);
return NULL;
}
copy_from_user (pScb->buff_ptr, user_area, xfer_size);
pScb->iDataSize = xfer_size;
switch (data[0]) {
case DCMD_FC_CMD:
switch (data[1]) {
case DCMD_FC_READ_NVRAM_CONFIG:
case DCMD_GET_DISK_CONFIG:
{
if ((ulong) pScb->
buff_ptr & (PAGE_SIZE - 1)) {
printk
("megaraid:user address not sufficient Error.\n");
SCpnt->result =
(DID_ERROR << 16);
callDone (SCpnt);
return NULL;
}
/*building SG list */
mega_build_kernel_sg (pScb->buff_ptr,
xfer_size,
pScb, mbox);
break;
}
default:
break;
} /*switch (data[1]) */
break;
}
}
#endif
mbox->cmd = data[0];
mbox->channel = data[1];
mbox->param = data[2];
mbox->pad[0] = data[3];
mbox->logdrv = data[4];
if (SCpnt->cmnd[0] == M_RD_IOCTL_CMD_NEW) {
switch (data[0]) {
case FW_FIRE_WRITE:
mbox->cmd = FW_FIRE_WRITE;
mbox->channel = data[1]; /* Current Block Number */
set_mbox_xfer_addr (megaCfg, pScb, mbox, TO_DEVICE);
mbox->numsgelements = 0;
break;
case FW_FIRE_FLASH:
mbox->cmd = FW_FIRE_FLASH;
mbox->channel = data[1] | 0x80; /* Origin */
set_mbox_xfer_addr (megaCfg, pScb, mbox, TO_DEVICE);
mbox->numsgelements = 0;
break;
case DCMD_FC_CMD:
*(mboxdata + 0) = data[0]; /*mailbox byte 0: DCMD_FC_CMD */
*(mboxdata + 2) = data[1]; /*sub command */
switch (data[1]) {
case DCMD_FC_READ_NVRAM_CONFIG:
case DCMD_FC_READ_NVRAM_CONFIG_64:
/* number of elements in SG list */
*(mboxdata + 3) = mbox->numsgelements;
if (megaCfg->flag & BOARD_64BIT)
*(mboxdata + 2) =
DCMD_FC_READ_NVRAM_CONFIG_64;
break;
case DCMD_WRITE_CONFIG:
case DCMD_WRITE_CONFIG_64:
if (megaCfg->flag & BOARD_64BIT)
*(mboxdata + 2) = DCMD_WRITE_CONFIG_64;
set_mbox_xfer_addr (megaCfg, pScb, mbox,
TO_DEVICE);
mbox->numsgelements = 0;
break;
case DCMD_GET_DISK_CONFIG:
case DCMD_GET_DISK_CONFIG_64:
if (megaCfg->flag & BOARD_64BIT)
*(mboxdata + 2) =
DCMD_GET_DISK_CONFIG_64;
*(mboxdata + 3) = data[2]; /*number of elements in SG list */
/*nr of elements in SG list */
*(mboxdata + 4) = mbox->numsgelements;
break;
case DCMD_DELETE_LOGDRV:
case DCMD_DELETE_DRIVEGROUP:
case NC_SUBOP_ENQUIRY3:
*(mboxdata + 3) = data[2];
set_mbox_xfer_addr (megaCfg, pScb, mbox,
FROMTO_DEVICE);
mbox->numsgelements = 0;
break;
case DCMD_CHANGE_LDNO:
case DCMD_CHANGE_LOOPID:
*(mboxdata + 3) = data[2];
*(mboxdata + 4) = data[3];
set_mbox_xfer_addr (megaCfg, pScb, mbox,
TO_DEVICE);
mbox->numsgelements = 0;
break;
default:
set_mbox_xfer_addr (megaCfg, pScb, mbox,
FROMTO_DEVICE);
mbox->numsgelements = 0;
break;
} /*switch */
break;
default:
set_mbox_xfer_addr (megaCfg, pScb, mbox, FROMTO_DEVICE);
mbox->numsgelements = 0;
break;
}
} else {
mbox->numsgelements = mega_build_sglist (megaCfg, pScb,
(u32 *) & mbox->
xferaddr,
(u32 *) & seg);
/* Handling some of the fw special commands */
switch (data[0]) {
case 6: /* START_DEV */
mbox->xferaddr = *((u32 *) & data[i + 6]);
break;
default:
break;
}
for (i = 0; i < (SCpnt->request_bufflen - 6); i++) {
data[i] = data[i + 6];
}
}
return (pScb);
}
static void mega_build_kernel_sg (char *barea, ulong xfersize, mega_scb * pScb, mega_ioctl_mbox * mbox)
{
ulong i, buffer_area, len, end, end_page, x, idx = 0;
buffer_area = (ulong) barea;
i = buffer_area;
end = buffer_area + xfersize;
end_page = (end) & ~(PAGE_SIZE - 1);
do {
len = PAGE_SIZE - (i % PAGE_SIZE);
x = pScb->sgList[idx].address =
virt_to_bus ((volatile void *) i);
pScb->sgList[idx].length = len;
i += len;
idx++;
} while (i < end_page);
if ((end - i) < 0) {
printk ("megaraid:Error in user address\n");
}
if (end - i) {
pScb->sgList[idx].address = virt_to_bus ((volatile void *) i);
pScb->sgList[idx].length = end - i;
idx++;
}
mbox->xferaddr = virt_to_bus (pScb->sgList);
mbox->numsgelements = idx;
}
#endif
#if DEBUG
static unsigned int cum_time = 0;
static unsigned int cum_time_cnt = 0;
static void showMbox (mega_scb * pScb)
{
mega_mailbox *mbox;
if (pScb == NULL)
return;
mbox = (mega_mailbox *) pScb->mboxData;
printk ("%u cmd:%x id:%x #scts:%x lba:%x addr:%x logdrv:%x #sg:%x\n",
pScb->SCpnt->pid,
mbox->cmd, mbox->cmdid, mbox->numsectors,
mbox->lba, mbox->xferaddr, mbox->logdrv, mbox->numsgelements);
}
#endif
/*--------------------------------------------------------------------
* Interrupt service routine
*--------------------------------------------------------------------*/
static void megaraid_isr (int irq, void *devp, struct pt_regs *regs)
{
IO_LOCK_T
mega_host_config * megaCfg;
u_char byte, idx, sIdx, tmpBox[MAILBOX_SIZE];
u32 dword = 0;
mega_mailbox *mbox;
mega_scb *pScb;
u_char qCnt, qStatus;
u_char completed[MAX_FIRMWARE_STATUS];
Scsi_Cmnd *SCpnt;
megaCfg = (mega_host_config *) devp;
mbox = (mega_mailbox *) tmpBox;
if (megaCfg->host->irq == irq) {
if (megaCfg->flag & IN_ISR) {
TRACE (("ISR called reentrantly!!\n"));
printk ("ISR called reentrantly!!\n");
}
megaCfg->flag |= IN_ISR;
if (mega_busyWaitMbox (megaCfg)) {
printk (KERN_WARNING "Error: mailbox busy in isr!\n");
}
/* Check if a valid interrupt is pending */
if (megaCfg->flag & BOARD_QUARTZ) {
dword = RDOUTDOOR (megaCfg);
if (dword != 0x10001234) {
/* Spurious interrupt */
megaCfg->flag &= ~IN_ISR;
return;
}
} else {
byte = READ_PORT (megaCfg->host->io_port, INTR_PORT);
if ((byte & VALID_INTR_BYTE) == 0) {
/* Spurious interrupt */
megaCfg->flag &= ~IN_ISR;
return;
}
WRITE_PORT (megaCfg->host->io_port, INTR_PORT, byte);
}
for (idx = 0; idx < MAX_FIRMWARE_STATUS; idx++)
completed[idx] = 0;
IO_LOCK;
megaCfg->nInterrupts++;
qCnt = 0xff;
while ((qCnt = megaCfg->mbox->numstatus) == 0xFF) ;
qStatus = 0xff;
while ((qStatus = megaCfg->mbox->status) == 0xFF) ;
/* Get list of completed requests */
for (idx = 0; idx < qCnt; idx++) {
while ((sIdx = megaCfg->mbox->completed[idx]) == 0xFF) {
printk ("p");
}
completed[idx] = sIdx;
sIdx = 0xFF;
}
if (megaCfg->flag & BOARD_QUARTZ) {
WROUTDOOR (megaCfg, dword);
/* Acknowledge interrupt */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
/* In this case mbox contains physical address */
#if 0
WRINDOOR (megaCfg, megaCfg->adjdmahandle64 | 0x2);
#else
WRINDOOR (megaCfg, 0x2);
#endif
#else
#if 0
WRINDOOR (megaCfg, virt_to_bus (megaCfg->mbox) | 0x2);
#else
WRINDOOR (megaCfg, 0x2);
#endif
#endif
#if 0
while (RDINDOOR (megaCfg) & 0x02) ;
#endif
} else {
CLEAR_INTR (megaCfg->host->io_port);
}
#if DEBUG
if (qCnt >= MAX_FIRMWARE_STATUS) {
printk ("megaraid_isr: cmplt=%d ", qCnt);
}
#endif
for (idx = 0; idx < qCnt; idx++) {
sIdx = completed[idx];
if ((sIdx > 0) && (sIdx <= MAX_COMMANDS)) {
pScb = &megaCfg->scbList[sIdx - 1];
/* ASSERT(pScb->state == SCB_ISSUED); */
#if DEBUG
if (((jiffies) - pScb->isrcount) > maxCmdTime) {
maxCmdTime = (jiffies) - pScb->isrcount;
printk
("megaraid_isr : cmd time = %u\n",
maxCmdTime);
}
#endif
/*
* Assuming that the scsi command, for which
* an abort request was received earlier, has
* completed.
*/
if (pScb->state == SCB_ABORTED) {
SCpnt = pScb->SCpnt;
}
if (pScb->state == SCB_RESET) {
SCpnt = pScb->SCpnt;
mega_freeSCB (megaCfg, pScb);
SCpnt->result = (DID_RESET << 16);
if (megaCfg->qCompletedH == NULL) {
megaCfg->qCompletedH =
megaCfg->qCompletedT =
SCpnt;
} else {
megaCfg->qCompletedT->
host_scribble =
(unsigned char *) SCpnt;
megaCfg->qCompletedT = SCpnt;
}
megaCfg->qCompletedT->host_scribble =
(unsigned char *) NULL;
megaCfg->qCcnt++;
continue;
}
/* We don't want the ISR routine to touch M_RD_IOCTL_CMD_NEW commands, so
* don't mark them as complete, instead we pop their semaphore so
* that the queue routine can finish them off
*/
if (pScb->SCpnt->cmnd[0] == M_RD_IOCTL_CMD_NEW) {
/* save the status byte for the queue routine to use */
pScb->SCpnt->result = qStatus;
up (&pScb->ioctl_sem);
} else {
/* Mark command as completed */
mega_cmd_done (megaCfg, pScb, qStatus);
}
} else {
printk
("megaraid: wrong cmd id completed from firmware:id=%x\n",
sIdx);
}
}
mega_rundoneq (megaCfg);
megaCfg->flag &= ~IN_ISR;
/* Loop through any pending requests */
mega_runpendq (megaCfg);
IO_UNLOCK;
}
}
/*==================================================*/
/* Wait until the controller's mailbox is available */
/*==================================================*/
static int mega_busyWaitMbox (mega_host_config * megaCfg)
{
mega_mailbox *mbox = (mega_mailbox *) megaCfg->mbox;
long counter;
for (counter = 0; counter < 10000; counter++) {
if (!mbox->busy) {
return 0;
}
udelay (100);
barrier ();
}
return -1; /* give up after 1 second */
}
/*=====================================================
* Post a command to the card
*
* Arguments:
* mega_host_config *megaCfg - Controller structure
* u_char *mboxData - Mailbox area, 16 bytes
* mega_scb *pScb - SCB posting (or NULL if N/A)
* int intr - if 1, interrupt, 0 is blocking
* Return Value: (added on 7/26 for 40ld/64bit)
* -1: the command was not actually issued out
* other cases:
* intr==0, return ScsiStatus, i.e. mbox->status
* intr==1, return 0
*=====================================================
*/
static int megaIssueCmd (mega_host_config * megaCfg, u_char * mboxData,
mega_scb * pScb, int intr)
{
volatile mega_mailbox *mbox = (mega_mailbox *) megaCfg->mbox;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
volatile mega_mailbox64 *mbox64 = (mega_mailbox64 *) megaCfg->mbox64;
#endif
u_char byte;
#ifdef __LP64__
u64 phys_mbox;
#else
u32 phys_mbox;
#endif
u8 retval = -1;
mboxData[0x1] = (pScb ? pScb->idx + 1 : 0xFE); /* Set cmdid */
mboxData[0xF] = 1; /* Set busy */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
/* In this case mbox contains physical address */
phys_mbox = megaCfg->adjdmahandle64;
#else
phys_mbox = virt_to_bus (megaCfg->mbox);
#endif
#if DEBUG
ShowMbox (pScb);
#endif
/* Wait until mailbox is free */
if (mega_busyWaitMbox (megaCfg)) {
printk ("Blocked mailbox......!!\n");
udelay (1000);
#if DEBUG
showMbox (pLastScb);
#endif
/* Abort command */
if (pScb == NULL) {
TRACE (("NULL pScb in megaIssue\n"));
printk ("NULL pScb in megaIssue\n");
}
mega_cmd_done (megaCfg, pScb, 0x08);
return -1;
}
pLastScb = pScb;
/* Copy mailbox data into host structure */
megaCfg->mbox64->xferSegment_lo = 0;
megaCfg->mbox64->xferSegment_hi = 0;
memcpy ((char *) mbox, mboxData, 16);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
switch (mboxData[0]) {
case MEGA_MBOXCMD_LREAD64:
case MEGA_MBOXCMD_LWRITE64:
mbox64->xferSegment_lo = mbox->xferaddr;
mbox64->xferSegment_hi = 0;
mbox->xferaddr = 0xFFFFFFFF;
break;
}
#endif
/* Kick IO */
if (intr) {
/* Issue interrupt (non-blocking) command */
if (megaCfg->flag & BOARD_QUARTZ) {
mbox->mraid_poll = 0;
mbox->mraid_ack = 0;
WRINDOOR (megaCfg, phys_mbox | 0x1);
} else {
ENABLE_INTR (megaCfg->host->io_port);
ISSUE_COMMAND (megaCfg->host->io_port);
}
pScb->state = SCB_ISSUED;
retval = 0;
} else { /* Issue non-ISR (blocking) command */
disable_irq (megaCfg->host->irq);
if (megaCfg->flag & BOARD_QUARTZ) {
mbox->mraid_poll = 0;
mbox->mraid_ack = 0;
mbox->numstatus = 0xFF;
mbox->status = 0xFF;
WRINDOOR (megaCfg, phys_mbox | 0x1);
while (mbox->numstatus == 0xFF) ;
while (mbox->status == 0xFF) ;
while (mbox->mraid_poll != 0x77) ;
mbox->mraid_poll = 0;
mbox->mraid_ack = 0x77;
/* while ((cmdDone = RDOUTDOOR (megaCfg)) != 0x10001234);
WROUTDOOR (megaCfg, cmdDone); */
if (pScb) {
mega_cmd_done (megaCfg, pScb, mbox->status);
}
WRINDOOR (megaCfg, phys_mbox | 0x2);
while (RDINDOOR (megaCfg) & 0x2) ;
} else {
DISABLE_INTR (megaCfg->host->io_port);
ISSUE_COMMAND (megaCfg->host->io_port);
while (!
((byte =
READ_PORT (megaCfg->host->io_port,
INTR_PORT)) & INTR_VALID)) ;
WRITE_PORT (megaCfg->host->io_port, INTR_PORT, byte);
ENABLE_INTR (megaCfg->host->io_port);
CLEAR_INTR (megaCfg->host->io_port);
if (pScb) {
mega_cmd_done (megaCfg, pScb, mbox->status);
} else {
TRACE (("Error: NULL pScb!\n"));
}
}
enable_irq (megaCfg->host->irq);
retval = mbox->status;
}
#if DEBUG
while (mega_busyWaitMbox (megaCfg)) {
printk(KERN_ERR "Blocked mailbox on exit......!\n");
udelay (1000);
}
#endif
return retval;
}
/*-------------------------------------------------------------------
* Copies data to SGLIST
*-------------------------------------------------------------------*/
/* Note:
For 64 bit cards, we need a minimum of one SG element for read/write
*/
static int
mega_build_sglist (mega_host_config * megaCfg, mega_scb * scb,
u32 * buffer, u32 * length)
{
struct scatterlist *sgList;
int idx;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
int sgcnt;
#endif
mega_mailbox *mbox = NULL;
mbox = (mega_mailbox *) scb->mboxData;
/* Scatter-gather not used */
if (scb->SCpnt->use_sg == 0) {
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
scb->dma_h_bulkdata = pci_map_single (megaCfg->dev,
scb->SCpnt->request_buffer,
scb->SCpnt->request_bufflen,
scb->dma_direction);
/* We need to handle special commands like READ64, WRITE64
as they need a minimum of 1 SG irrespective of actually SG
*/
if ((megaCfg->flag & BOARD_64BIT) &&
((mbox->cmd == MEGA_MBOXCMD_LREAD64) ||
(mbox->cmd == MEGA_MBOXCMD_LWRITE64))) {
scb->sg64List[0].address = scb->dma_h_bulkdata;
scb->sg64List[0].length = scb->SCpnt->request_bufflen;
*buffer = scb->dma_sghandle64;
*length = 0;
scb->sglist_count = 1;
return 1;
} else {
*buffer = scb->dma_h_bulkdata;
*length = (u32) scb->SCpnt->request_bufflen;
}
#else
*buffer = virt_to_bus (scb->SCpnt->request_buffer);
*length = (u32) scb->SCpnt->request_bufflen;
#endif
return 0;
}
sgList = (struct scatterlist *) scb->SCpnt->request_buffer;
if (scb->SCpnt->use_sg == 1) {
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
scb->dma_h_bulkdata = pci_map_single (megaCfg->dev,
sgList[0].address,
sgList[0].length, scb->dma_direction);
if ((megaCfg->flag & BOARD_64BIT) &&
((mbox->cmd == MEGA_MBOXCMD_LREAD64) ||
(mbox->cmd == MEGA_MBOXCMD_LWRITE64))) {
scb->sg64List[0].address = scb->dma_h_bulkdata;
scb->sg64List[0].length = scb->SCpnt->request_bufflen;
*buffer = scb->dma_sghandle64;
*length = 0;
scb->sglist_count = 1;
return 1;
} else {
*buffer = scb->dma_h_bulkdata;
*length = (u32) sgList[0].length;
}
#else
*buffer = virt_to_bus (sgList[0].address);
*length = (u32) sgList[0].length;
#endif
return 0;
}
/* Copy Scatter-Gather list info into controller structure */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
sgcnt = pci_map_sg (megaCfg->dev,
sgList, scb->SCpnt->use_sg, scb->dma_direction);
/* Determine the validity of the new count */
if (sgcnt == 0)
printk ("pci_map_sg returned zero!!! ");
for (idx = 0; idx < sgcnt; idx++, sgList++) {
if ((megaCfg->flag & BOARD_64BIT) &&
((mbox->cmd == MEGA_MBOXCMD_LREAD64) ||
(mbox->cmd == MEGA_MBOXCMD_LWRITE64))) {
scb->sg64List[idx].address = sg_dma_address (sgList);
scb->sg64List[idx].length = sg_dma_len (sgList);
} else {
scb->sgList[idx].address = sg_dma_address (sgList);
scb->sgList[idx].length = sg_dma_len (sgList);
}
}
#else
for (idx = 0; idx < scb->SCpnt->use_sg; idx++) {
scb->sgList[idx].address = virt_to_bus (sgList[idx].address);
scb->sgList[idx].length = (u32) sgList[idx].length;
}
#endif
/* Reset pointer and length fields */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
*buffer = scb->dma_sghandle64;
scb->sglist_count = scb->SCpnt->use_sg;
#else
*buffer = virt_to_bus (scb->sgList);
#endif
*length = 0;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
/* Return count of SG requests */
return sgcnt;
#else
/* Return count of SG requests */
return scb->SCpnt->use_sg;
#endif
}
/*--------------------------------------------------------------------
* Initializes the address of the controller's mailbox register
* The mailbox register is used to issue commands to the card.
* Format of the mailbox area:
* 00 01 command
* 01 01 command id
* 02 02 # of sectors
* 04 04 logical bus address
* 08 04 physical buffer address
* 0C 01 logical drive #
* 0D 01 length of scatter/gather list
* 0E 01 reserved
* 0F 01 mailbox busy
* 10 01 numstatus byte
* 11 01 status byte
*--------------------------------------------------------------------*/
static int
mega_register_mailbox (mega_host_config * megaCfg, u32 paddr)
{
/* align on 16-byte boundary */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
megaCfg->mbox = &megaCfg->mailbox64ptr->mailbox;
#else
megaCfg->mbox = &megaCfg->mailbox64.mailbox;
#endif
#ifdef __LP64__
megaCfg->mbox = (mega_mailbox *) ((((u64) megaCfg->mbox) + 16) & ((u64) (-1) ^ 0x0F));
megaCfg->adjdmahandle64 = (megaCfg->dma_handle64 + 16) & ((u64) (-1) ^ 0x0F);
megaCfg->mbox64 = (mega_mailbox64 *) ((u_char *) megaCfg->mbox - sizeof (u64));
paddr = (paddr + 4 + 16) & ((u64) (-1) ^ 0x0F);
#else
megaCfg->mbox
= (mega_mailbox *) ((((u32) megaCfg->mbox) + 16) & 0xFFFFFFF0);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
megaCfg->adjdmahandle64 = ((megaCfg->dma_handle64 + 16) & 0xFFFFFFF0);
#endif
megaCfg->mbox64 = (mega_mailbox64 *) ((u_char *) megaCfg->mbox - 8);
paddr = (paddr + 4 + 16) & 0xFFFFFFF0;
#endif
/* Register mailbox area with the firmware */
if (!(megaCfg->flag & BOARD_QUARTZ)) {
WRITE_PORT (megaCfg->host->io_port, MBOX_PORT0, paddr & 0xFF);
WRITE_PORT (megaCfg->host->io_port, MBOX_PORT1,
(paddr >> 8) & 0xFF);
WRITE_PORT (megaCfg->host->io_port, MBOX_PORT2,
(paddr >> 16) & 0xFF);
WRITE_PORT (megaCfg->host->io_port, MBOX_PORT3,
(paddr >> 24) & 0xFF);
WRITE_PORT (megaCfg->host->io_port, ENABLE_MBOX_REGION,
ENABLE_MBOX_BYTE);
CLEAR_INTR (megaCfg->host->io_port);
ENABLE_INTR (megaCfg->host->io_port);
}
return 0;
}
/*---------------------------------------------------------------------------
* mega_Convert8ldTo40ld() -- takes all info in AdapterInquiry structure and
* puts it into ProductInfo and Enquiry3 structures for later use
*---------------------------------------------------------------------------*/
static void mega_Convert8ldTo40ld (mega_RAIDINQ * inquiry,
mega_Enquiry3 * enquiry3,
megaRaidProductInfo * productInfo)
{
int i;
productInfo->MaxConcCmds = inquiry->AdpInfo.MaxConcCmds;
enquiry3->rbldRate = inquiry->AdpInfo.RbldRate;
productInfo->SCSIChanPresent = inquiry->AdpInfo.ChanPresent;
for (i = 0; i < 4; i++) {
productInfo->FwVer[i] = inquiry->AdpInfo.FwVer[i];
productInfo->BiosVer[i] = inquiry->AdpInfo.BiosVer[i];
}
enquiry3->cacheFlushInterval = inquiry->AdpInfo.CacheFlushInterval;
productInfo->DramSize = inquiry->AdpInfo.DramSize;
enquiry3->numLDrv = inquiry->LogdrvInfo.NumLDrv;
for (i = 0; i < MAX_LOGICAL_DRIVES; i++) {
enquiry3->lDrvSize[i] = inquiry->LogdrvInfo.LDrvSize[i];
enquiry3->lDrvProp[i] = inquiry->LogdrvInfo.LDrvProp[i];
enquiry3->lDrvState[i]
= inquiry->LogdrvInfo.LDrvState[i];
}
for (i = 0; i < (MAX_PHYSICAL_DRIVES); i++) {
enquiry3->pDrvState[i]
= inquiry->PhysdrvInfo.PDrvState[i];
}
}
/*-------------------------------------------------------------------
* Issue an adapter info query to the controller
*-------------------------------------------------------------------*/
static int mega_i_query_adapter (mega_host_config * megaCfg)
{
mega_Enquiry3 *enquiry3Pnt;
mega_mailbox *mbox;
u_char mboxData[16];
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
dma_addr_t raid_inq_dma_handle = 0, prod_info_dma_handle = 0, enquiry3_dma_handle = 0;
#endif
u8 retval;
/* Initialize adapter inquiry mailbox */
mbox = (mega_mailbox *) mboxData;
memset ((void *) megaCfg->mega_buffer, 0,
sizeof (megaCfg->mega_buffer));
memset (mbox, 0, 16);
/*
* Try to issue Enquiry3 command
* if not succeeded, then issue MEGA_MBOXCMD_ADAPTERINQ command and
* update enquiry3 structure
*/
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
enquiry3_dma_handle = pci_map_single (megaCfg->dev,
(void *) megaCfg->mega_buffer,
(2 * 1024L), PCI_DMA_FROMDEVICE);
mbox->xferaddr = enquiry3_dma_handle;
#else
/*Taken care */
mbox->xferaddr = virt_to_bus ((void *) megaCfg->mega_buffer);
#endif
/* Initialize mailbox databuffer addr */
enquiry3Pnt = (mega_Enquiry3 *) megaCfg->mega_buffer;
/* point mega_Enguiry3 to the data buf */
mboxData[0] = FC_NEW_CONFIG; /* i.e. mbox->cmd=0xA1 */
mboxData[2] = NC_SUBOP_ENQUIRY3; /* i.e. 0x0F */
mboxData[3] = ENQ3_GET_SOLICITED_FULL; /* i.e. 0x02 */
/* Issue a blocking command to the card */
if ((retval = megaIssueCmd (megaCfg, mboxData, NULL, 0)) != 0) { /* the adapter does not support 40ld */
mega_RAIDINQ adapterInquiryData;
mega_RAIDINQ *adapterInquiryPnt = &adapterInquiryData;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
raid_inq_dma_handle = pci_map_single (megaCfg->dev,
(void *) adapterInquiryPnt,
sizeof (mega_RAIDINQ),
PCI_DMA_FROMDEVICE);
mbox->xferaddr = raid_inq_dma_handle;
#else
/*taken care */
mbox->xferaddr = virt_to_bus ((void *) adapterInquiryPnt);
#endif
mbox->cmd = MEGA_MBOXCMD_ADAPTERINQ; /*issue old 0x05 command to adapter */
/* Issue a blocking command to the card */ ;
retval = megaIssueCmd (megaCfg, mboxData, NULL, 0);
pci_unmap_single (megaCfg->dev,
raid_inq_dma_handle,
sizeof (mega_RAIDINQ), PCI_DMA_FROMDEVICE);
/*update Enquiry3 and ProductInfo structures with mega_RAIDINQ structure*/
mega_Convert8ldTo40ld (adapterInquiryPnt,
enquiry3Pnt,
(megaRaidProductInfo *) & megaCfg->
productInfo);
} else { /* adapter supports 40ld */
megaCfg->flag |= BOARD_40LD;
pci_unmap_single (megaCfg->dev,
enquiry3_dma_handle,
(2 * 1024L), PCI_DMA_FROMDEVICE);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
/*get productInfo, which is static information and will be unchanged*/
prod_info_dma_handle
= pci_map_single (megaCfg->dev,
(void *) &megaCfg->productInfo,
sizeof (megaRaidProductInfo),
PCI_DMA_FROMDEVICE);
mbox->xferaddr = prod_info_dma_handle;
#else
/*taken care */
mbox->xferaddr = virt_to_bus ((void *) &megaCfg->productInfo);
#endif
mboxData[0] = FC_NEW_CONFIG; /* i.e. mbox->cmd=0xA1 */
mboxData[2] = NC_SUBOP_PRODUCT_INFO; /* i.e. 0x0E */
if ((retval = megaIssueCmd (megaCfg, mboxData, NULL, 0)) != 0)
printk ("ami:Product_info cmd failed with error: %d\n",
retval);
pci_unmap_single (megaCfg->dev,
prod_info_dma_handle,
sizeof (megaRaidProductInfo),
PCI_DMA_FROMDEVICE);
}
megaCfg->host->max_channel = megaCfg->productInfo.SCSIChanPresent;
megaCfg->host->max_id = 16; /* max targets per channel */
/*(megaCfg->flag & BOARD_40LD)?FC_MAX_TARGETS_PER_CHANNEL:MAX_TARGET+1; */
megaCfg->host->max_lun = /* max lun */
(megaCfg->
flag & BOARD_40LD) ? FC_MAX_LOGICAL_DRIVES : MAX_LOGICAL_DRIVES;
megaCfg->host->cmd_per_lun = MAX_CMD_PER_LUN;
megaCfg->numldrv = enquiry3Pnt->numLDrv;
megaCfg->max_cmds = megaCfg->productInfo.MaxConcCmds;
if (megaCfg->max_cmds > MAX_COMMANDS)
megaCfg->max_cmds = MAX_COMMANDS - 1;
megaCfg->host->can_queue = megaCfg->max_cmds - 1;
#if 0
if (megaCfg->host->can_queue >= MAX_COMMANDS) {
megaCfg->host->can_queue = MAX_COMMANDS - 16;
}
#endif
/* use HP firmware and bios version encoding */
if (megaCfg->productInfo.subSystemVendorID == HP_SUBSYS_ID) {
sprintf (megaCfg->fwVer, "%c%d%d.%d%d",
megaCfg->productInfo.FwVer[2],
megaCfg->productInfo.FwVer[1] >> 8,
megaCfg->productInfo.FwVer[1] & 0x0f,
megaCfg->productInfo.FwVer[2] >> 8,
megaCfg->productInfo.FwVer[2] & 0x0f);
sprintf (megaCfg->biosVer, "%c%d%d.%d%d",
megaCfg->productInfo.BiosVer[2],
megaCfg->productInfo.BiosVer[1] >> 8,
megaCfg->productInfo.BiosVer[1] & 0x0f,
megaCfg->productInfo.BiosVer[2] >> 8,
megaCfg->productInfo.BiosVer[2] & 0x0f);
} else {
memcpy (megaCfg->fwVer, (char *) megaCfg->productInfo.FwVer, 4);
megaCfg->fwVer[4] = 0;
memcpy (megaCfg->biosVer, (char *) megaCfg->productInfo.BiosVer, 4);
megaCfg->biosVer[4] = 0;
}
megaCfg->support_ext_cdb = mega_support_ext_cdb(megaCfg);
printk (KERN_NOTICE "megaraid: [%s:%s] detected %d logical drives" M_RD_CRLFSTR,
megaCfg->fwVer, megaCfg->biosVer, megaCfg->numldrv);
if ( megaCfg->support_ext_cdb ) {
printk(KERN_NOTICE "megaraid: supports extended CDBs.\n");
}
/*
* I hope that I can unmap here, reason DMA transaction is not required any more
* after this
*/
return 0;
}
/*-------------------------------------------------------------------------
*
* Driver interface functions
*
*-------------------------------------------------------------------------*/
/*----------------------------------------------------------
* Returns data to be displayed in /proc/scsi/megaraid/X
*----------------------------------------------------------*/
int megaraid_proc_info (char *buffer, char **start, off_t offset,
int length, int host_no, int inout)
{
*start = buffer;
return 0;
}
static int mega_findCard (Scsi_Host_Template * pHostTmpl,
u16 pciVendor, u16 pciDev, long flag)
{
mega_host_config *megaCfg = NULL;
struct Scsi_Host *host = NULL;
u_char pciBus, pciDevFun, megaIrq;
u16 magic;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
u32 magic64;
#endif
int i;
#ifdef __LP64__
u64 megaBase;
#else
u32 megaBase;
#endif
u16 pciIdx = 0;
u16 numFound = 0;
u16 subsysid, subsysvid;
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,0) /* 0x20100 */
while (!pcibios_find_device
(pciVendor, pciDev, pciIdx, &pciBus, &pciDevFun)) {
#else
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,3,0) /*0x20300 */
struct pci_dev *pdev = NULL;
#else
struct pci_dev *pdev = pci_devices;
#endif
while ((pdev = pci_find_device (pciVendor, pciDev, pdev))) {
if(pci_enable_device (pdev))
continue;
pciBus = pdev->bus->number;
pciDevFun = pdev->devfn;
#endif
if ((flag & BOARD_QUARTZ) && (skip_id == -1)) {
pcibios_read_config_word (pciBus, pciDevFun,
PCI_CONF_AMISIG, &magic);
if ((magic != AMI_SIGNATURE)
&& (magic != AMI_SIGNATURE_471)) {
pciIdx++;
continue; /* not an AMI board */
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
pcibios_read_config_dword (pciBus, pciDevFun,
PCI_CONF_AMISIG64, &magic64);
if (magic64 == AMI_64BIT_SIGNATURE)
flag |= BOARD_64BIT;
#endif
}
/* Hmmm...Should we not make this more modularized so that in future we dont add
for each firmware */
if (flag & BOARD_QUARTZ) {
/* Check to see if this is a Dell PERC RAID controller model 466 */
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,0) /* 0x20100 */
pcibios_read_config_word (pciBus, pciDevFun,
PCI_SUBSYSTEM_VENDOR_ID,
&subsysvid);
pcibios_read_config_word (pciBus, pciDevFun,
PCI_SUBSYSTEM_ID, &subsysid);
#else
pci_read_config_word (pdev,
PCI_SUBSYSTEM_VENDOR_ID,
&subsysvid);
pci_read_config_word (pdev,
PCI_SUBSYSTEM_ID, &subsysid);
#endif
#if 0
/*
* This routine is called with well know values and we
* should not be getting what we have not asked.
* Also, the check is not right. It should have been for
* pci_vendor_id not subsysvid - AM
*/
/* If we dont detect this valid subsystem vendor id's
we refuse to load the driver
PART of PC200X compliance
*/
if ((subsysvid != AMI_SUBSYS_ID)
&& (subsysvid != DELL_SUBSYS_ID)
&& (subsysvid != HP_SUBSYS_ID))
continue;
#endif
}
printk (KERN_NOTICE
"megaraid: found 0x%4.04x:0x%4.04x:idx %d:bus %d:slot %d:func %d\n",
pciVendor, pciDev, pciIdx, pciBus, PCI_SLOT (pciDevFun),
PCI_FUNC (pciDevFun));
/* Read the base port and IRQ from PCI */
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,0) /* 0x20100 */
pcibios_read_config_dword (pciBus, pciDevFun,
PCI_BASE_ADDRESS_0,
(u_int *) & megaBase);
pcibios_read_config_byte (pciBus, pciDevFun,
PCI_INTERRUPT_LINE, &megaIrq);
#elif LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0) /*0x20300 */
megaBase = pdev->base_address[0];
megaIrq = pdev->irq;
#else
megaBase = pci_resource_start (pdev, 0);
megaIrq = pdev->irq;
#endif
pciIdx++;
if (flag & BOARD_QUARTZ) {
megaBase &= PCI_BASE_ADDRESS_MEM_MASK;
megaBase = (long) ioremap (megaBase, 128);
if (!megaBase)
continue;
} else {
megaBase &= PCI_BASE_ADDRESS_IO_MASK;
megaBase += 0x10;
}
/* Initialize SCSI Host structure */
host = scsi_register (pHostTmpl, sizeof (mega_host_config));
if (!host)
goto err_unmap;
/*
* Comment the following initialization if you know 'max_sectors' is
* not defined for this kernel.
* This field was introduced in Linus's kernel 2.4.7pre3 and it
* greatly increases the IO performance - AM
*/
host->max_sectors = 1024;
scsi_set_pci_device(host, pdev);
megaCfg = (mega_host_config *) host->hostdata;
memset (megaCfg, 0, sizeof (mega_host_config));
printk (KERN_NOTICE "scsi%d : Found a MegaRAID controller at 0x%x, IRQ: %d"
M_RD_CRLFSTR, host->host_no, (u_int) megaBase, megaIrq);
if (flag & BOARD_64BIT)
printk (KERN_NOTICE "scsi%d : Enabling 64 bit support\n",
host->host_no);
/* Copy resource info into structure */
megaCfg->qCompletedH = NULL;
megaCfg->qCompletedT = NULL;
megaCfg->qPendingH = NULL;
megaCfg->qPendingT = NULL;
megaCfg->qFreeH = NULL;
megaCfg->qFreeT = NULL;
megaCfg->qFcnt = 0;
megaCfg->qPcnt = 0;
megaCfg->qCcnt = 0;
megaCfg->lock_free = SPIN_LOCK_UNLOCKED;
megaCfg->lock_pend = SPIN_LOCK_UNLOCKED;
megaCfg->lock_scsicmd = SPIN_LOCK_UNLOCKED;
megaCfg->flag = flag;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
megaCfg->dev = pdev;
#endif
megaCfg->host = host;
megaCfg->base = megaBase;
megaCfg->host->irq = megaIrq;
megaCfg->host->io_port = megaBase;
megaCfg->host->n_io_port = 16;
megaCfg->host->unique_id = (pciBus << 8) | pciDevFun;
megaCtlrs[numCtlrs] = megaCfg;
if (!(flag & BOARD_QUARTZ)) {
/* Request our IO Range */
if (check_region (megaBase, 16)) {
printk(KERN_WARNING "megaraid: Couldn't register I/O range!\n");
goto err_unregister;
}
request_region(megaBase, 16, "megaraid");
}
/* Request our IRQ */
if (request_irq (megaIrq, megaraid_isr, SA_SHIRQ,
"megaraid", megaCfg)) {
printk (KERN_WARNING
"megaraid: Couldn't register IRQ %d!\n",
megaIrq);
goto err_release;
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
/*
* unmap while releasing the driver, Is it required to be
* PCI_DMA_BIDIRECTIONAL
*/
megaCfg->mailbox64ptr
= pci_alloc_consistent (megaCfg->dev,
sizeof (mega_mailbox64),
&(megaCfg->dma_handle64));
mega_register_mailbox (megaCfg,
virt_to_bus ((void *) megaCfg->
mailbox64ptr));
#else
mega_register_mailbox (megaCfg,
virt_to_bus ((void *) &megaCfg->
mailbox64));
#endif
mega_i_query_adapter (megaCfg);
if ((subsysid == 0x1111) && (subsysvid == 0x1111)) {
/*
* Which firmware
*/
if( strcmp(megaCfg->fwVer, "3.00") == 0 ||
strcmp(megaCfg->fwVer, "3.01") == 0 ) {
printk( KERN_WARNING
"megaraid: Your card is a Dell PERC 2/SC RAID controller "
"with firmware\nmegaraid: 3.00 or 3.01. This driver is "
"known to have corruption issues\nmegaraid: with those "
"firmware versions on this specific card. In order\n"
"megaraid: to protect your data, please upgrade your "
"firmware to version\nmegaraid: 3.10 or later, available "
"from the Dell Technical Support web\nmegaraid: site at\n"
"http://support.dell.com/us/en/filelib/download/"
"index.asp?fileid=2940\n"
);
}
}
/*
* If we have a HP 1M(0x60E7)/2M(0x60E8) controller with
* firmware H.01.07 or H.01.08, disable 64 bit support,
* since this firmware cannot handle 64 bit addressing
*/
if( (subsysvid == HP_SUBSYS_ID) &&
((subsysid == 0x60E7)||(subsysid == 0x60E8)) ) {
/*
* which firmware
*/
if( strcmp(megaCfg->fwVer, "H01.07") == 0 ||
strcmp(megaCfg->fwVer, "H01.08") == 0 ) {
printk(KERN_WARNING
"megaraid: Firmware H.01.07 or H.01.08 on 1M/2M "
"controllers\nmegaraid: do not support 64 bit "
"addressing.\n"
"megaraid: DISABLING 64 bit support.\n");
megaCfg->flag &= ~BOARD_64BIT;
}
}
if (mega_is_bios_enabled (megaCfg)) {
mega_hbas[numCtlrs].is_bios_enabled = 1;
}
/*
* Find out which channel is raid and which is scsi
*/
mega_enum_raid_scsi(megaCfg);
for( i = 0; i < megaCfg->host->max_channel; i++ ) {
if(IS_RAID_CH(i))
printk(KERN_NOTICE"megaraid: channel[%d] is raid.\n", i+1);
else
printk(KERN_NOTICE"megaraid: channel[%d] is scsi.\n", i+1);
}
/*
* Find out if a logical drive is set as the boot drive. If there is
* one, will make that as the first logical drive.
*/
mega_get_boot_ldrv(megaCfg);
mega_hbas[numCtlrs].hostdata_addr = megaCfg;
/* Initialize SCBs */
if (mega_init_scb (megaCfg)) {
pci_free_consistent (megaCfg->dev,
sizeof (mega_mailbox64),
(void *) megaCfg->mailbox64ptr,
megaCfg->dma_handle64);
scsi_unregister (host);
continue;
}
/*
* Fill in the structure which needs to be passed back to the
* application when it does an ioctl() for controller related
* information.
*/
i = numCtlrs;
numCtlrs++;
mcontroller[i].base = megaBase;
mcontroller[i].irq = megaIrq;
mcontroller[i].numldrv = megaCfg->numldrv;
mcontroller[i].pcibus = pciBus;
mcontroller[i].pcidev = pciDev;
mcontroller[i].pcifun = PCI_FUNC (pciDevFun);
mcontroller[i].pciid = pciIdx;
mcontroller[i].pcivendor = pciVendor;
mcontroller[i].pcislot = PCI_SLOT (pciDevFun);
mcontroller[i].uid = (pciBus << 8) | pciDevFun;
numFound++;
/* Set the Mode of addressing to 64 bit */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
if ((megaCfg->flag & BOARD_64BIT) && BITS_PER_LONG == 64)
#ifdef __LP64__
pdev->dma_mask = 0xffffffffffffffff;
#else
pdev->dma_mask = 0xffffffff;
#endif
#endif
continue;
err_release:
if (flag & BOARD_QUARTZ)
release_region (megaBase, 16);
err_unregister:
scsi_unregister (host);
err_unmap:
if (flag & BOARD_QUARTZ)
iounmap ((void *) megaBase);
}
return numFound;
}
/*---------------------------------------------------------
* Detects if a megaraid controller exists in this system
*---------------------------------------------------------*/
int megaraid_detect (Scsi_Host_Template * pHostTmpl)
{
int ctlridx = 0, count = 0;
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0) /*0x20300 */
pHostTmpl->proc_dir = &proc_scsi_megaraid;
#else
pHostTmpl->proc_name = "megaraid";
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,0) /* 0x20100 */
if (!pcibios_present ()) {
printk (KERN_WARNING "megaraid: PCI bios not present."
M_RD_CRLFSTR);
return 0;
}
#endif
skip_id = -1;
if (megaraid && !strncmp (megaraid, "skip", strlen ("skip"))) {
if (megaraid[4] != '\0') {
skip_id = megaraid[4] - '0';
if (megaraid[5] != '\0') {
skip_id = (skip_id * 10) + (megaraid[5] - '0');
}
}
skip_id = (skip_id > 15) ? -1 : skip_id;
}
printk (KERN_NOTICE "megaraid: " MEGARAID_VERSION M_RD_CRLFSTR);
memset (mega_hbas, 0, sizeof (mega_hbas));
count += mega_findCard (pHostTmpl, PCI_VENDOR_ID_AMI,
PCI_DEVICE_ID_AMI_MEGARAID, 0);
count += mega_findCard (pHostTmpl, PCI_VENDOR_ID_AMI,
PCI_DEVICE_ID_AMI_MEGARAID2, 0);
count += mega_findCard (pHostTmpl, 0x8086,
PCI_DEVICE_ID_AMI_MEGARAID3, BOARD_QUARTZ);
count += mega_findCard (pHostTmpl, PCI_VENDOR_ID_AMI,
PCI_DEVICE_ID_AMI_MEGARAID3, BOARD_QUARTZ);
mega_reorder_hosts ();
#ifdef CONFIG_PROC_FS
if (count) {
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,3,0) /*0x20300 */
mega_proc_dir_entry = proc_mkdir ("megaraid", &proc_root);
#else
mega_proc_dir_entry = create_proc_entry ("megaraid",
S_IFDIR | S_IRUGO |
S_IXUGO, &proc_root);
#endif
if (!mega_proc_dir_entry)
printk ("megaraid: failed to create megaraid root\n");
else
for (ctlridx = 0; ctlridx < count; ctlridx++)
mega_create_proc_entry (ctlridx,
mega_proc_dir_entry);
}
#endif
/*
* Register the driver as a character device, for applications to access
* it for ioctls.
* Ideally, this should go in the init_module() routine, but since it is
* hidden in the file "scsi_module.c" ( included in the end ), we define
* it here
* First argument (major) to register_chrdev implies a dynamic major
* number allocation.
*/
major = register_chrdev (0, "megadev", &megadev_fops);
/*
* Register the Shutdown Notification hook in kernel
*/
if (register_reboot_notifier (&mega_notifier)) {
printk ("MegaRAID Shutdown routine not registered!!\n");
}
init_MUTEX (&mimd_entry_mtx);
return count;
}
/*---------------------------------------------------------------------
* Release the controller's resources
*---------------------------------------------------------------------*/
int megaraid_release (struct Scsi_Host *pSHost)
{
mega_host_config *megaCfg;
mega_mailbox *mbox;
u_char mboxData[16];
int i;
megaCfg = (mega_host_config *) pSHost->hostdata;
mbox = (mega_mailbox *) mboxData;
/* Flush cache to disk */
memset (mbox, 0, 16);
mboxData[0] = 0xA;
free_irq (megaCfg->host->irq, megaCfg); /* Must be freed first, otherwise
extra interrupt is generated */
/* Issue a blocking (interrupts disabled) command to the card */
megaIssueCmd (megaCfg, mboxData, NULL, 0);
/* Free our resources */
if (megaCfg->flag & BOARD_QUARTZ) {
iounmap ((void *) megaCfg->base);
} else {
release_region (megaCfg->host->io_port, 16);
}
mega_freeSgList (megaCfg);
pci_free_consistent (megaCfg->dev,
sizeof (mega_mailbox64),
(void *) megaCfg->mailbox64ptr,
megaCfg->dma_handle64);
#ifdef CONFIG_PROC_FS
if (megaCfg->controller_proc_dir_entry) {
remove_proc_entry ("stat", megaCfg->controller_proc_dir_entry);
remove_proc_entry ("status",
megaCfg->controller_proc_dir_entry);
remove_proc_entry ("config",
megaCfg->controller_proc_dir_entry);
remove_proc_entry ("mailbox",
megaCfg->controller_proc_dir_entry);
for (i = 0; i < numCtlrs; i++) {
char buf[12] = { 0 };
sprintf (buf, "%d", i);
remove_proc_entry (buf, mega_proc_dir_entry);
}
remove_proc_entry ("megaraid", &proc_root);
}
#endif
/*
* Release the controller memory. A word of warning this frees
* hostdata and that includes megaCfg-> so be careful what you
* dereference beyond this point
*/
scsi_unregister (pSHost);
/*
* Unregister the character device interface to the driver. Ideally this
* should have been done in cleanup_module routine. Since this is hidden
* in file "scsi_module.c", we do it here.
* major is the major number of the character device returned by call to
* register_chrdev() routine.
*/
unregister_chrdev (major, "megadev");
unregister_reboot_notifier (&mega_notifier);
return 0;
}
static int mega_is_bios_enabled (mega_host_config * megacfg)
{
mega_mailbox *mboxpnt;
unsigned char mbox[16];
int ret;
mboxpnt = (mega_mailbox *) mbox;
memset (mbox, 0, sizeof (mbox));
memset ((void *) megacfg->mega_buffer,
0, sizeof (megacfg->mega_buffer));
/*
* issue command to find out if the BIOS is enabled for this controller
*/
mbox[0] = IS_BIOS_ENABLED;
mbox[2] = GET_BIOS;
mboxpnt->xferaddr = virt_to_bus ((void *) megacfg->mega_buffer);
ret = megaIssueCmd (megacfg, mbox, NULL, 0);
return (*(char *) megacfg->mega_buffer);
}
/*
* Find out what channels are RAID/SCSI
*/
void
mega_enum_raid_scsi(mega_host_config *megacfg)
{
mega_mailbox *mboxp;
unsigned char mbox[16];
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
dma_addr_t dma_handle;
#endif
mboxp = (mega_mailbox *)mbox;
memset(mbox, 0, sizeof(mbox));
/*
* issue command to find out what channels are raid/scsi
*/
mbox[0] = CHNL_CLASS;
mbox[2] = GET_CHNL_CLASS;
memset((void *)megacfg->mega_buffer, 0, sizeof(megacfg->mega_buffer));
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
dma_handle = pci_map_single(megacfg->dev, (void *)megacfg->mega_buffer,
(2 * 1024L), PCI_DMA_FROMDEVICE);
mboxp->xferaddr = dma_handle;
#else
mboxp->xferaddr = virt_to_bus((void *)megacfg->mega_buffer);
#endif
/*
* Non-ROMB firware fail this command, so all channels
* must be shown RAID
*/
if( megaIssueCmd(megacfg, mbox, NULL, 0) == 0 ) {
mega_ch_class = *((char *)megacfg->mega_buffer);
/* logical drives channel is RAID */
mega_ch_class |= (0x01 << megacfg->host->max_channel);
}
else {
mega_ch_class = 0xFF;
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
pci_unmap_single(megacfg->dev, dma_handle,
(2 * 1024L), PCI_DMA_FROMDEVICE);
#endif
}
/*
* get the boot logical drive number if enabled
*/
void
mega_get_boot_ldrv(mega_host_config *megacfg)
{
mega_mailbox *mboxp;
unsigned char mbox[16];
struct private_bios_data *prv_bios_data;
u16 cksum = 0;
char *cksum_p;
int i;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
dma_addr_t dma_handle;
#endif
mboxp = (mega_mailbox *)mbox;
memset(mbox, 0, sizeof(mbox));
mbox[0] = BIOS_PVT_DATA;
mbox[2] = GET_BIOS_PVT_DATA;
memset((void *)megacfg->mega_buffer, 0, sizeof(megacfg->mega_buffer));
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
dma_handle = pci_map_single(megacfg->dev, (void *)megacfg->mega_buffer,
(2 * 1024L), PCI_DMA_FROMDEVICE);
mboxp->xferaddr = dma_handle;
#else
mboxp->xferaddr = virt_to_bus((void *)megacfg->mega_buffer);
#endif
megacfg->boot_ldrv_enabled = 0;
megacfg->boot_ldrv = 0;
if( megaIssueCmd(megacfg, mbox, NULL, 0) == 0 ) {
prv_bios_data = (struct private_bios_data *)megacfg->mega_buffer;
cksum = 0;
cksum_p = (char *)prv_bios_data;
for( i = 0; i < 14; i++ ) {
cksum += (u16)(*cksum_p++);
}
if( prv_bios_data->cksum == (u16)(0-cksum) ) {
megacfg->boot_ldrv_enabled = 1;
megacfg->boot_ldrv = prv_bios_data->boot_ldrv;
}
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
pci_unmap_single(megacfg->dev, dma_handle,
(2 * 1024L), PCI_DMA_FROMDEVICE);
#endif
}
static void mega_reorder_hosts (void)
{
struct Scsi_Host *shpnt;
struct Scsi_Host *shone;
struct Scsi_Host *shtwo;
mega_host_config *boot_host;
int i;
/*
* Find the (first) host which has it's BIOS enabled
*/
boot_host = NULL;
for (i = 0; i < MAX_CONTROLLERS; i++) {
if (mega_hbas[i].is_bios_enabled) {
boot_host = mega_hbas[i].hostdata_addr;
break;
}
}
if (boot_host == NULL) {
printk (KERN_WARNING "megaraid: no BIOS enabled.\n");
return;
}
/*
* Traverse through the list of SCSI hosts for our HBA locations
*/
shone = shtwo = NULL;
for (shpnt = scsi_hostlist; shpnt; shpnt = shpnt->next) {
/* Is it one of ours? */
for (i = 0; i < MAX_CONTROLLERS; i++) {
if ((mega_host_config *) shpnt->hostdata ==
mega_hbas[i].hostdata_addr) {
/* Does this one has BIOS enabled */
if (mega_hbas[i].hostdata_addr == boot_host) {
/* Are we first */
if (shtwo == NULL) /* Yes! */
return;
else { /* :-( */
shone = shpnt;
}
} else {
if (!shtwo) {
/* were we here before? xchng first */
shtwo = shpnt;
}
}
break;
}
}
/*
* Have we got the boot host and one which does not have the bios
* enabled.
*/
if (shone && shtwo)
break;
}
if (shone && shtwo) {
mega_swap_hosts (shone, shtwo);
}
return;
}
static void mega_swap_hosts (struct Scsi_Host *shone, struct Scsi_Host *shtwo)
{
struct Scsi_Host *prevtoshtwo;
struct Scsi_Host *prevtoshone;
struct Scsi_Host *save = NULL;;
/* Are these two nodes adjacent */
if (shtwo->next == shone) {
if (shtwo == scsi_hostlist && shone->next == NULL) {
/* just two nodes */
scsi_hostlist = shone;
shone->next = shtwo;
shtwo->next = NULL;
} else if (shtwo == scsi_hostlist) {
/* first two nodes of the list */
scsi_hostlist = shone;
shtwo->next = shone->next;
scsi_hostlist->next = shtwo;
} else if (shone->next == NULL) {
/* last two nodes of the list */
prevtoshtwo = scsi_hostlist;
while (prevtoshtwo->next != shtwo)
prevtoshtwo = prevtoshtwo->next;
prevtoshtwo->next = shone;
shone->next = shtwo;
shtwo->next = NULL;
} else {
prevtoshtwo = scsi_hostlist;
while (prevtoshtwo->next != shtwo)
prevtoshtwo = prevtoshtwo->next;
prevtoshtwo->next = shone;
shtwo->next = shone->next;
shone->next = shtwo;
}
} else if (shtwo == scsi_hostlist && shone->next == NULL) {
/* shtwo at head, shone at tail, not adjacent */
prevtoshone = scsi_hostlist;
while (prevtoshone->next != shone)
prevtoshone = prevtoshone->next;
scsi_hostlist = shone;
shone->next = shtwo->next;
prevtoshone->next = shtwo;
shtwo->next = NULL;
} else if (shtwo == scsi_hostlist && shone->next != NULL) {
/* shtwo at head, shone is not at tail */
prevtoshone = scsi_hostlist;
while (prevtoshone->next != shone)
prevtoshone = prevtoshone->next;
scsi_hostlist = shone;
prevtoshone->next = shtwo;
save = shtwo->next;
shtwo->next = shone->next;
shone->next = save;
} else if (shone->next == NULL) {
/* shtwo not at head, shone at tail */
prevtoshtwo = scsi_hostlist;
prevtoshone = scsi_hostlist;
while (prevtoshtwo->next != shtwo)
prevtoshtwo = prevtoshtwo->next;
while (prevtoshone->next != shone)
prevtoshone = prevtoshone->next;
prevtoshtwo->next = shone;
shone->next = shtwo->next;
prevtoshone->next = shtwo;
shtwo->next = NULL;
} else {
prevtoshtwo = scsi_hostlist;
prevtoshone = scsi_hostlist;
save = NULL;;
while (prevtoshtwo->next != shtwo)
prevtoshtwo = prevtoshtwo->next;
while (prevtoshone->next != shone)
prevtoshone = prevtoshone->next;
prevtoshtwo->next = shone;
save = shone->next;
shone->next = shtwo->next;
prevtoshone->next = shtwo;
shtwo->next = save;
}
return;
}
static inline void mega_freeSgList (mega_host_config * megaCfg)
{
int i;
for (i = 0; i < megaCfg->max_cmds; i++) {
if (megaCfg->scbList[i].sgList)
pci_free_consistent (megaCfg->dev,
sizeof (mega_64sglist) *
MAX_SGLIST,
megaCfg->scbList[i].sgList,
megaCfg->scbList[i].
dma_sghandle64);
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,4,0) /* 0x020400 */
kfree (megaCfg->scbList[i].sgList); /* free sgList */
#endif
}
}
/*----------------------------------------------
* Get information about the card/driver
*----------------------------------------------*/
const char *megaraid_info (struct Scsi_Host *pSHost)
{
static char buffer[512];
mega_host_config *megaCfg;
megaCfg = (mega_host_config *) pSHost->hostdata;
sprintf (buffer,
"AMI MegaRAID %s %d commands %d targs %d chans %d luns",
megaCfg->fwVer, megaCfg->productInfo.MaxConcCmds,
megaCfg->host->max_id, megaCfg->host->max_channel,
megaCfg->host->max_lun);
return buffer;
}
/*-----------------------------------------------------------------
* Perform a SCSI command
* Mailbox area:
* 00 01 command
* 01 01 command id
* 02 02 # of sectors
* 04 04 logical bus address
* 08 04 physical buffer address
* 0C 01 logical drive #
* 0D 01 length of scatter/gather list
* 0E 01 reserved
* 0F 01 mailbox busy
* 10 01 numstatus byte
* 11 01 status byte
*-----------------------------------------------------------------*/
int megaraid_queue (Scsi_Cmnd * SCpnt, void (*pktComp) (Scsi_Cmnd *))
{
DRIVER_LOCK_T mega_host_config * megaCfg;
mega_scb *pScb;
char *user_area = NULL;
megaCfg = (mega_host_config *) SCpnt->host->hostdata;
DRIVER_LOCK (megaCfg);
if (!(megaCfg->flag & (1L << SCpnt->channel))) {
if (SCpnt->channel < SCpnt->host->max_channel)
printk ( KERN_NOTICE
"scsi%d: scanning channel %c for devices.\n",
megaCfg->host->host_no, SCpnt->channel + '1');
else
printk ( KERN_NOTICE
"scsi%d: scanning virtual channel for logical drives.\n",
megaCfg->host->host_no);
megaCfg->flag |= (1L << SCpnt->channel);
}
SCpnt->scsi_done = pktComp;
if (mega_driver_ioctl (megaCfg, SCpnt))
return 0;
/* If driver in abort or reset.. cancel this command */
if (megaCfg->flag & IN_ABORT) {
SCpnt->result = (DID_ABORT << 16);
/* Add Scsi_Command to end of completed queue */
if (megaCfg->qCompletedH == NULL) {
megaCfg->qCompletedH = megaCfg->qCompletedT = SCpnt;
} else {
megaCfg->qCompletedT->host_scribble =
(unsigned char *) SCpnt;
megaCfg->qCompletedT = SCpnt;
}
megaCfg->qCompletedT->host_scribble = (unsigned char *) NULL;
megaCfg->qCcnt++;
DRIVER_UNLOCK (megaCfg);
return 0;
} else if (megaCfg->flag & IN_RESET) {
SCpnt->result = (DID_RESET << 16);
/* Add Scsi_Command to end of completed queue */
if (megaCfg->qCompletedH == NULL) {
megaCfg->qCompletedH = megaCfg->qCompletedT = SCpnt;
} else {
megaCfg->qCompletedT->host_scribble =
(unsigned char *) SCpnt;
megaCfg->qCompletedT = SCpnt;
}
megaCfg->qCompletedT->host_scribble = (unsigned char *) NULL;
megaCfg->qCcnt++;
DRIVER_UNLOCK (megaCfg);
return 0;
}
megaCfg->flag |= IN_QUEUE;
/* Allocate and build a SCB request */
if ((pScb = mega_build_cmd (megaCfg, SCpnt)) != NULL) {
/*build SCpnt for M_RD_IOCTL_CMD_NEW cmd in mega_ioctl() */
/* Add SCB to the head of the pending queue */
/* Add SCB to the head of the pending queue */
if (megaCfg->qPendingH == NULL) {
megaCfg->qPendingH = megaCfg->qPendingT = pScb;
} else {
megaCfg->qPendingT->next = pScb;
megaCfg->qPendingT = pScb;
}
megaCfg->qPendingT->next = NULL;
megaCfg->qPcnt++;
if (mega_runpendq (megaCfg) == -1) {
DRIVER_UNLOCK (megaCfg);
return 0;
}
if (pScb->SCpnt->cmnd[0] == M_RD_IOCTL_CMD_NEW) {
init_MUTEX_LOCKED (&pScb->ioctl_sem);
spin_unlock_irq (&io_request_lock);
down (&pScb->ioctl_sem);
user_area = (char *)*((u32*)&pScb->SCpnt->cmnd[4]);
if (copy_to_user
(user_area, pScb->buff_ptr, pScb->iDataSize)) {
printk
("megaraid: Error copying ioctl return value to user buffer.\n");
pScb->SCpnt->result = (DID_ERROR << 16);
}
spin_lock_irq (&io_request_lock);
DRIVER_LOCK (megaCfg);
kfree (pScb->buff_ptr);
pScb->buff_ptr = NULL;
mega_cmd_done (megaCfg, pScb, pScb->SCpnt->result);
mega_rundoneq (megaCfg);
mega_runpendq (megaCfg);
DRIVER_UNLOCK (megaCfg);
}
megaCfg->flag &= ~IN_QUEUE;
}
DRIVER_UNLOCK (megaCfg);
return 0;
}
/*----------------------------------------------------------------------
* Issue a blocking command to the controller
*----------------------------------------------------------------------*/
volatile static int internal_done_flag = 0;
volatile static int internal_done_errcode = 0;
static DECLARE_WAIT_QUEUE_HEAD (internal_wait);
static void internal_done (Scsi_Cmnd * SCpnt)
{
internal_done_errcode = SCpnt->result;
internal_done_flag++;
wake_up (&internal_wait);
}
/* shouldn't be used, but included for completeness */
int megaraid_command (Scsi_Cmnd * SCpnt)
{
internal_done_flag = 0;
/* Queue command, and wait until it has completed */
megaraid_queue (SCpnt, internal_done);
while (!internal_done_flag) {
interruptible_sleep_on (&internal_wait);
}
return internal_done_errcode;
}
/*---------------------------------------------------------------------
* Abort a previous SCSI request
*---------------------------------------------------------------------*/
int megaraid_abort (Scsi_Cmnd * SCpnt)
{
mega_host_config *megaCfg;
int rc; /*, idx; */
mega_scb *pScb;
rc = SCSI_ABORT_NOT_RUNNING;
megaCfg = (mega_host_config *) SCpnt->host->hostdata;
megaCfg->flag |= IN_ABORT;
for (pScb = megaCfg->qPendingH; pScb; pScb = pScb->next) {
if (pScb->SCpnt == SCpnt) {
/* Found an aborting command */
#if DEBUG
showMbox (pScb);
#endif
/*
* If the command is queued to be issued to the firmware, abort the scsi cmd,
* If the command is already aborted in a previous call to the _abort entry
* point, return SCSI_ABORT_SNOOZE, suggesting a reset.
* If the command is issued to the firmware, which might complete after
* some time, we will mark the scb as aborted, and return to the mid layer,
* that abort could not be done.
* In the ISR, when this command actually completes, we will perform a normal
* completion.
*
* Oct 27, 1999
*/
switch (pScb->state) {
case SCB_ABORTED: /* Already aborted */
rc = SCSI_ABORT_SNOOZE;
break;
case SCB_ISSUED: /* Waiting on ISR result */
rc = SCSI_ABORT_NOT_RUNNING;
pScb->state = SCB_ABORTED;
break;
case SCB_ACTIVE: /* still on the pending queue */
mega_freeSCB (megaCfg, pScb);
SCpnt->result = (DID_ABORT << 16);
if (megaCfg->qCompletedH == NULL) {
megaCfg->qCompletedH =
megaCfg->qCompletedT = SCpnt;
} else {
megaCfg->qCompletedT->host_scribble =
(unsigned char *) SCpnt;
megaCfg->qCompletedT = SCpnt;
}
megaCfg->qCompletedT->host_scribble =
(unsigned char *) NULL;
megaCfg->qCcnt++;
rc = SCSI_ABORT_SUCCESS;
break;
default:
printk
("megaraid_abort: unknown command state!!\n");
rc = SCSI_ABORT_NOT_RUNNING;
break;
}
break;
}
}
megaCfg->flag &= ~IN_ABORT;
#if DEBUG
if (megaCfg->flag & IN_QUEUE)
printk ("ma:flag is in queue\n");
if (megaCfg->qCompletedH == NULL)
printk ("ma:qchead == null\n");
#endif
/*
* This is required here to complete any completed requests to be communicated
* over to the mid layer.
* Calling just mega_rundoneq() did not work.
*/
if (megaCfg->qCompletedH) {
SCpnt = megaCfg->qCompletedH;
megaCfg->qCompletedH = (Scsi_Cmnd *) SCpnt->host_scribble;
megaCfg->qCcnt--;
SCpnt->host_scribble = (unsigned char *) NULL;
/* Callback */
callDone (SCpnt);
}
mega_rundoneq (megaCfg);
return rc;
}
/*---------------------------------------------------------------------
* Reset a previous SCSI request
*---------------------------------------------------------------------*/
int megaraid_reset (Scsi_Cmnd * SCpnt, unsigned int rstflags)
{
mega_host_config *megaCfg;
int idx;
int rc;
mega_scb *pScb;
rc = SCSI_RESET_NOT_RUNNING;
megaCfg = (mega_host_config *) SCpnt->host->hostdata;
megaCfg->flag |= IN_RESET;
printk
("megaraid_RESET: %.08lx cmd=%.02x <c=%d.t=%d.l=%d>, flag = %x\n",
SCpnt->serial_number, SCpnt->cmnd[0], SCpnt->channel,
SCpnt->target, SCpnt->lun, rstflags);
TRACE (("RESET: %.08lx %.02x <%d.%d.%d>\n",
SCpnt->serial_number, SCpnt->cmnd[0], SCpnt->channel,
SCpnt->target, SCpnt->lun));
/*
* Walk list of SCBs for any that are still outstanding
*/
for (idx = 0; idx < megaCfg->max_cmds; idx++) {
if (megaCfg->scbList[idx].state != SCB_FREE) {
SCpnt = megaCfg->scbList[idx].SCpnt;
pScb = &megaCfg->scbList[idx];
if (SCpnt != NULL) {
pScb->state = SCB_RESET;
break;
}
}
}
megaCfg->flag &= ~IN_RESET;
mega_rundoneq (megaCfg);
return rc;
}
#ifdef CONFIG_PROC_FS
/* Following code handles /proc fs */
static int proc_printf (mega_host_config * megaCfg, const char *fmt, ...)
{
va_list args;
int i;
if (megaCfg->procidx > PROCBUFSIZE)
return 0;
va_start (args, fmt);
i = vsprintf ((megaCfg->procbuf + megaCfg->procidx), fmt, args);
va_end (args);
megaCfg->procidx += i;
return i;
}
static int proc_read_config (char *page, char **start, off_t offset,
int count, int *eof, void *data)
{
mega_host_config *megaCfg = (mega_host_config *) data;
*start = page;
if (megaCfg->productInfo.ProductName[0] != 0)
proc_printf (megaCfg, "%s\n", megaCfg->productInfo.ProductName);
proc_printf (megaCfg, "Controller Type: ");
if (megaCfg->flag & BOARD_QUARTZ)
proc_printf (megaCfg, "438/466/467/471/493\n");
else
proc_printf (megaCfg, "418/428/434\n");
if (megaCfg->flag & BOARD_40LD)
proc_printf (megaCfg,
"Controller Supports 40 Logical Drives\n");
if (megaCfg->flag & BOARD_64BIT)
proc_printf (megaCfg,
"Controller / Driver uses 64 bit memory addressing\n");
proc_printf (megaCfg, "Base = %08x, Irq = %d, ", megaCfg->base,
megaCfg->host->irq);
proc_printf (megaCfg, "Logical Drives = %d, Channels = %d\n",
megaCfg->numldrv, megaCfg->productInfo.SCSIChanPresent);
proc_printf (megaCfg, "Version =%s:%s, DRAM = %dMb\n",
megaCfg->fwVer, megaCfg->biosVer,
megaCfg->productInfo.DramSize);
proc_printf (megaCfg,
"Controller Queue Depth = %d, Driver Queue Depth = %d\n",
megaCfg->productInfo.MaxConcCmds, megaCfg->max_cmds);
COPY_BACK;
return count;
}
static int proc_read_stat (char *page, char **start, off_t offset,
int count, int *eof, void *data)
{
int i;
mega_host_config *megaCfg = (mega_host_config *) data;
*start = page;
proc_printf (megaCfg, "Statistical Information for this controller\n");
proc_printf (megaCfg, "Interrupts Collected = %lu\n",
megaCfg->nInterrupts);
for (i = 0; i < megaCfg->numldrv; i++) {
proc_printf (megaCfg, "Logical Drive %d:\n", i);
proc_printf (megaCfg,
"\tReads Issued = %lu, Writes Issued = %lu\n",
megaCfg->nReads[i], megaCfg->nWrites[i]);
proc_printf (megaCfg,
"\tSectors Read = %lu, Sectors Written = %lu\n\n",
megaCfg->nReadBlocks[i], megaCfg->nWriteBlocks[i]);
}
COPY_BACK;
return count;
}
static int proc_read_status (char *page, char **start, off_t offset,
int count, int *eof, void *data)
{
mega_host_config *megaCfg = (mega_host_config *) data;
*start = page;
proc_printf (megaCfg, "TBD\n");
COPY_BACK;
return count;
}
static int proc_read_mbox (char *page, char **start, off_t offset,
int count, int *eof, void *data)
{
mega_host_config *megaCfg = (mega_host_config *) data;
volatile mega_mailbox *mbox = megaCfg->mbox;
*start = page;
proc_printf (megaCfg, "Contents of Mail Box Structure\n");
proc_printf (megaCfg, " Fw Command = 0x%02x\n", mbox->cmd);
proc_printf (megaCfg, " Cmd Sequence = 0x%02x\n", mbox->cmdid);
proc_printf (megaCfg, " No of Sectors= %04d\n", mbox->numsectors);
proc_printf (megaCfg, " LBA = 0x%02x\n", mbox->lba);
proc_printf (megaCfg, " DTA = 0x%08x\n", mbox->xferaddr);
proc_printf (megaCfg, " Logical Drive= 0x%02x\n", mbox->logdrv);
proc_printf (megaCfg, " No of SG Elmt= 0x%02x\n", mbox->numsgelements);
proc_printf (megaCfg, " Busy = %01x\n", mbox->busy);
proc_printf (megaCfg, " Status = 0x%02x\n", mbox->status);
/* proc_printf(megaCfg, "Dump of MailBox\n");
for (i = 0; i < 16; i++)
proc_printf(megaCfg, "%02x ",*(mbox + i));
proc_printf(megaCfg, "\n\nNumber of Status = %02d\n",mbox->numstatus);
for (i = 0; i < 46; i++) {
proc_printf(megaCfg,"%02d ",*(mbox + 16 + i));
if (i%16)
proc_printf(megaCfg,"\n");
}
if (!mbox->numsgelements) {
dta = phys_to_virt(mbox->xferaddr);
for (i = 0; i < mbox->numsgelements; i++)
if (dta) {
proc_printf(megaCfg,"Addr = %08x\n", (ulong)*(dta + i)); proc_printf(megaCfg,"Length = %08x\n",
(ulong)*(dta + i + 4));
}
}*/
COPY_BACK;
return count;
}
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,3,0) /*0x20300 */
#define CREATE_READ_PROC(string, fxn) create_proc_read_entry(string, \
S_IRUSR | S_IFREG,\
controller_proc_dir_entry,\
fxn, megaCfg)
#else
#define CREATE_READ_PROC(string, fxn) create_proc_read_entry(string,S_IRUSR | S_IFREG, controller_proc_dir_entry, fxn, megaCfg)
static struct proc_dir_entry *
create_proc_read_entry (const char *string,
int mode,
struct proc_dir_entry *parent,
read_proc_t * fxn, mega_host_config * megaCfg)
{
struct proc_dir_entry *temp = NULL;
temp = kmalloc (sizeof (struct proc_dir_entry), GFP_KERNEL);
if (!temp)
return NULL;
memset (temp, 0, sizeof (struct proc_dir_entry));
if ((temp->name = kmalloc (strlen (string) + 1, GFP_KERNEL)) == NULL) {
kfree (temp);
return NULL;
}
strcpy ((char *) temp->name, string);
temp->namelen = strlen (string);
temp->mode = mode; /*S_IFREG | S_IRUSR */ ;
temp->data = (void *) megaCfg;
temp->read_proc = fxn;
proc_register (parent, temp);
return temp;
}
#endif
static void mega_create_proc_entry (int index, struct proc_dir_entry *parent)
{
u_char string[64] = { 0 };
mega_host_config *megaCfg = megaCtlrs[index];
struct proc_dir_entry *controller_proc_dir_entry = NULL;
sprintf (string, "%d", index);
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,3,0) /*0x20300 */
controller_proc_dir_entry =
megaCfg->controller_proc_dir_entry = proc_mkdir (string, parent);
#else
controller_proc_dir_entry =
megaCfg->controller_proc_dir_entry =
create_proc_entry (string, S_IFDIR | S_IRUGO | S_IXUGO, parent);
#endif
if (!controller_proc_dir_entry)
printk ("\nmegaraid: proc_mkdir failed\n");
else {
megaCfg->proc_read =
CREATE_READ_PROC ("config", proc_read_config);
megaCfg->proc_status =
CREATE_READ_PROC ("status", proc_read_status);
megaCfg->proc_stat = CREATE_READ_PROC ("stat", proc_read_stat);
megaCfg->proc_mbox =
CREATE_READ_PROC ("mailbox", proc_read_mbox);
}
}
#endif /* CONFIG_PROC_FS */
/*-------------------------------------------------------------
* Return the disk geometry for a particular disk
* Input:
* Disk *disk - Disk geometry
* kdev_t dev - Device node
* int *geom - Returns geometry fields
* geom[0] = heads
* geom[1] = sectors
* geom[2] = cylinders
*-------------------------------------------------------------*/
int megaraid_biosparam (Disk * disk, kdev_t dev, int *geom)
{
int heads, sectors, cylinders;
mega_host_config *megaCfg;
/* Get pointer to host config structure */
megaCfg = (mega_host_config *) disk->device->host->hostdata;
if( IS_RAID_CH(disk->device->channel)) {
/* Default heads (64) & sectors (32) */
heads = 64;
sectors = 32;
cylinders = disk->capacity / (heads * sectors);
/* Handle extended translation size for logical drives > 1Gb */
if (disk->capacity >= 0x200000) {
heads = 255;
sectors = 63;
cylinders = disk->capacity / (heads * sectors);
}
/* return result */
geom[0] = heads;
geom[1] = sectors;
geom[2] = cylinders;
}
else {
if( mega_partsize(disk, dev, geom) == 0 ) return 0;
printk(KERN_WARNING
"megaraid: invalid partition on this disk on channel %d\n",
disk->device->channel);
/* Default heads (64) & sectors (32) */
heads = 64;
sectors = 32;
cylinders = disk->capacity / (heads * sectors);
/* Handle extended translation size for logical drives > 1Gb */
if (disk->capacity >= 0x200000) {
heads = 255;
sectors = 63;
cylinders = disk->capacity / (heads * sectors);
}
/* return result */
geom[0] = heads;
geom[1] = sectors;
geom[2] = cylinders;
}
return 0;
}
/*
* Function : static int mega_partsize(Disk * disk, kdev_t dev, int *geom)
*
* Purpose : to determine the BIOS mapping used to create the partition
* table, storing the results (cyls, hds, and secs) in geom
*
* Note: Code is picked from scsicam.h
*
* Returns : -1 on failure, 0 on success.
*/
static int
mega_partsize(Disk * disk, kdev_t dev, int *geom)
{
struct buffer_head *bh;
struct partition *p, *largest = NULL;
int i, largest_cyl;
int heads, cyls, sectors;
int capacity = disk->capacity;
int ma = MAJOR(dev);
int mi = (MINOR(dev) & ~0xf);
int block = 1024;
if(blksize_size[ma])
block = blksize_size[ma][mi];
if(!(bh = bread(MKDEV(ma,mi), 0, block)))
return -1;
if( *(unsigned short *)(bh->b_data + 510) == 0xAA55 ) {
for( largest_cyl = -1, p = (struct partition *)(0x1BE + bh->b_data),
i = 0; i < 4; ++i, ++p) {
if (!p->sys_ind) continue;
cyls = p->end_cyl + ((p->end_sector & 0xc0) << 2);
if(cyls >= largest_cyl) {
largest_cyl = cyls;
largest = p;
}
}
}
if (largest) {
heads = largest->end_head + 1;
sectors = largest->end_sector & 0x3f;
if (heads == 0 || sectors == 0) {
brelse(bh);
return -1;
}
cyls = capacity/(heads * sectors);
geom[0] = heads;
geom[1] = sectors;
geom[2] = cyls;
brelse(bh);
return 0;
}
brelse(bh);
return -1;
}
/*
* This routine will be called when the use has done a forced shutdown on the
* system. Flush the Adapter cache, that's the most we can do.
*/
static int megaraid_reboot_notify (struct notifier_block *this, unsigned long code,
void *unused)
{
struct Scsi_Host *pSHost;
mega_host_config *megaCfg;
mega_mailbox *mbox;
u_char mboxData[16];
int i;
if (code == SYS_DOWN || code == SYS_HALT) {
for (i = 0; i < numCtlrs; i++) {
pSHost = megaCtlrs[i]->host;
megaCfg = (mega_host_config *) pSHost->hostdata;
mbox = (mega_mailbox *) mboxData;
/* Flush cache to disk */
memset (mbox, 0, 16);
mboxData[0] = 0xA;
/*
* Free irq, otherwise extra interrupt is generated
*/
free_irq (megaCfg->host->irq, megaCfg);
/*
* Issue a blocking (interrupts disabled) command to
* the card
*/
megaIssueCmd (megaCfg, mboxData, NULL, 0);
}
}
return NOTIFY_DONE;
}
static int mega_init_scb (mega_host_config * megacfg)
{
int idx;
#if DEBUG
if (megacfg->max_cmds >= MAX_COMMANDS) {
printk ("megaraid:ctlr max cmds = %x : MAX_CMDS = %x",
megacfg->max_cmds, MAX_COMMANDS);
}
#endif
for (idx = megacfg->max_cmds - 1; idx >= 0; idx--) {
megacfg->scbList[idx].idx = idx;
/*
* ISR will make this flag zero to indicate the command has been
* completed. This is only for user ioctl calls. Rest of the driver
* and the mid-layer operations are not connected with this flag.
*/
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
megacfg->scbList[idx].sgList =
pci_alloc_consistent (megacfg->dev,
sizeof (mega_64sglist) * MAX_SGLIST,
&(megacfg->scbList[idx].
dma_sghandle64));
megacfg->scbList[idx].sg64List =
(mega_64sglist *) megacfg->scbList[idx].sgList;
#else
megacfg->scbList[idx].sgList = kmalloc (sizeof (mega_sglist) * MAX_SGLIST, GFP_ATOMIC | GFP_DMA);
#endif
if (megacfg->scbList[idx].sgList == NULL) {
printk (KERN_WARNING
"Can't allocate sglist for id %d\n", idx);
mega_freeSgList (megacfg);
return -1;
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
megacfg->scbList[idx].pthru = pci_alloc_consistent (megacfg->dev,
sizeof (mega_passthru),
&(megacfg->scbList[idx].
dma_passthruhandle64));
if (megacfg->scbList[idx].pthru == NULL) {
printk (KERN_WARNING
"Can't allocate passthru for id %d\n", idx);
}
megacfg->scbList[idx].epthru =
pci_alloc_consistent(
megacfg->dev, sizeof(mega_ext_passthru),
&(megacfg->scbList[idx].dma_ext_passthruhandle64)
);
if (megacfg->scbList[idx].epthru == NULL) {
printk (KERN_WARNING
"Can't allocate extended passthru for id %d\n", idx);
}
/*
* Allocate a 256 Byte Bounce Buffer for handling INQ/RD_CAPA
*/
megacfg->scbList[idx].bounce_buffer = pci_alloc_consistent (megacfg->dev,
256,
&(megacfg->scbList[idx].
dma_bounce_buffer));
if (!megacfg->scbList[idx].bounce_buffer)
printk
("megaraid: allocation for bounce buffer failed\n");
megacfg->scbList[idx].dma_type = M_RD_DMA_TYPE_NONE;
#endif
if (idx < MAX_COMMANDS) {
/*
* Link to free list
* lock not required since we are loading the driver, so no
* commands possible right now.
*/
enq_scb_freelist (megacfg, &megacfg->scbList[idx],
NO_LOCK, INTR_ENB);
}
}
return 0;
}
/*
* Enqueues a SCB
*/
static void enq_scb_freelist (mega_host_config * megacfg, mega_scb * scb, int lock,
int intr)
{
if (lock == INTERNAL_LOCK || intr == INTR_DIS) {
if (intr == INTR_DIS)
spin_lock_irq (&megacfg->lock_free);
else
spin_lock (&megacfg->lock_free);
}
scb->state = SCB_FREE;
scb->SCpnt = NULL;
if (megacfg->qFreeH == (mega_scb *) NULL) {
megacfg->qFreeH = megacfg->qFreeT = scb;
} else {
megacfg->qFreeT->next = scb;
megacfg->qFreeT = scb;
}
megacfg->qFreeT->next = NULL;
megacfg->qFcnt++;
if (lock == INTERNAL_LOCK || intr == INTR_DIS) {
if (intr == INTR_DIS)
spin_unlock_irq (&megacfg->lock_free);
else
spin_unlock (&megacfg->lock_free);
}
}
/*
* Routines for the character/ioctl interface to the driver
*/
static int megadev_open (struct inode *inode, struct file *filep)
{
MOD_INC_USE_COUNT;
return 0; /* success */
}
static int megadev_ioctl_entry (struct inode *inode, struct file *filep,
unsigned int cmd, unsigned long arg)
{
int ret = -1;
/*
* We do not allow parallel ioctls to the driver as of now.
*/
down (&mimd_entry_mtx);
ret = megadev_ioctl (inode, filep, cmd, arg);
up (&mimd_entry_mtx);
return ret;
}
static int megadev_ioctl (struct inode *inode, struct file *filep,
unsigned int cmd, unsigned long arg)
{
int adapno;
kdev_t dev;
u32 inlen;
struct uioctl_t ioc;
char *kvaddr = NULL;
int nadap = numCtlrs;
u8 opcode;
u32 outlen;
int ret;
u8 subopcode;
Scsi_Cmnd *scsicmd;
struct Scsi_Host *shpnt;
char *uaddr;
struct uioctl_t *uioc;
dma_addr_t dma_addr;
u32 length;
mega_host_config *megacfg = NULL;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0) /* 0x020400 */
struct pci_dev pdev;
struct pci_dev *pdevp = &pdev;
#else
char *pdevp = NULL;
#endif
IO_LOCK_T;
if (!inode || !(dev = inode->i_rdev))
return -EINVAL;
if (_IOC_TYPE (cmd) != MEGAIOC_MAGIC)
return (-EINVAL);
/*
* Get the user ioctl structure
*/
ret = verify_area (VERIFY_WRITE, (char *) arg, sizeof (struct uioctl_t));
if (ret)
return ret;
if(copy_from_user (&ioc, (char *) arg, sizeof (struct uioctl_t)))
return -EFAULT;
/*
* The first call the applications should make is to find out the
* number of controllers in the system. The next logical call should
* be for getting the list of controllers in the system as detected
* by the driver.
*/
/*
* Get the opcode and subopcode for the commands
*/
opcode = ioc.ui.fcs.opcode;
subopcode = ioc.ui.fcs.subopcode;
switch (opcode) {
case M_RD_DRIVER_IOCTL_INTERFACE:
switch (subopcode) {
case MEGAIOC_QDRVRVER: /* Query driver version */
put_user (driver_ver, (u32 *) ioc.data);
return 0;
case MEGAIOC_QNADAP: /* Get # of adapters */
put_user (nadap, (int *) ioc.data);
return nadap;
case MEGAIOC_QADAPINFO: /* Get adapter information */
/*
* which adapter?
*/
adapno = ioc.ui.fcs.adapno;
/*
* The adapter numbers do not start with 0, at least in
* the user space. This is just to make sure, 0 is not the
* default value which will refer to adapter 1. So the
* user needs to make use of macros MKADAP() and GETADAP()
* (See megaraid.h) while making ioctl() call.
*/
adapno = GETADAP (adapno);
if (adapno >= numCtlrs)
return (-ENODEV);
ret = verify_area (VERIFY_WRITE,
ioc.data,
sizeof (struct mcontroller));
if (ret)
return ret;
/*
* Copy struct mcontroller to user area
*/
copy_to_user (ioc.data,
mcontroller + adapno,
sizeof (struct mcontroller));
return 0;
default:
return (-EINVAL);
} /* inner switch */
break;
case M_RD_IOCTL_CMD_NEW:
/* which adapter? */
adapno = ioc.ui.fcs.adapno;
/* See comment above: MEGAIOC_QADAPINFO */
adapno = GETADAP(adapno);
if (adapno >= numCtlrs)
return(-ENODEV);
length = ioc.ui.fcs.length;
/* Check for zero length buffer or very large buffers */
if( !length || length > 32*1024 )
return -EINVAL;
/* save the user address */
uaddr = ioc.ui.fcs.buffer;
/*
* For M_RD_IOCTL_CMD_NEW commands, the fields outlen and inlen of
* uioctl_t structure are treated as flags. If outlen is 1, the
* data is transferred from the device and if inlen is 1, the data
* is transferred to the device.
*/
outlen = ioc.outlen;
inlen = ioc.inlen;
if(outlen) {
ret = verify_area(VERIFY_WRITE, (char *)ioc.ui.fcs.buffer, length);
if (ret) return ret;
}
if(inlen) {
ret = verify_area(VERIFY_READ, (char *) ioc.ui.fcs.buffer, length);
if (ret) return ret;
}
/*
* Find this host
*/
for( shpnt = scsi_hostlist; shpnt; shpnt = shpnt->next ) {
if( shpnt->hostdata == (unsigned long *)megaCtlrs[adapno] ) {
megacfg = (mega_host_config *)shpnt->hostdata;
break;
}
}
if(shpnt == NULL) return -ENODEV;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
scsicmd = (Scsi_Cmnd *)kmalloc(sizeof(Scsi_Cmnd), GFP_KERNEL|GFP_DMA);
#else
scsicmd = (Scsi_Cmnd *)scsi_init_malloc(sizeof(Scsi_Cmnd),
GFP_ATOMIC | GFP_DMA);
#endif
if(scsicmd == NULL) return -ENOMEM;
memset(scsicmd, 0, sizeof(Scsi_Cmnd));
scsicmd->host = shpnt;
if( outlen || inlen ) {
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
pdevp = &pdev;
memcpy(pdevp, megacfg->dev, sizeof(struct pci_dev));
pdevp->dma_mask = 0xffffffff;
#else
pdevp = NULL;
#endif
kvaddr = dma_alloc_consistent(pdevp, length, &dma_addr);
if( kvaddr == NULL ) {
printk(KERN_WARNING "megaraid:allocation failed\n");
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0) /*0x20400 */
kfree(scsicmd);
#else
scsi_init_free((char *)scsicmd, sizeof(Scsi_Cmnd));
#endif
return -ENOMEM;
}
ioc.ui.fcs.buffer = kvaddr;
if (inlen) {
/* copyin the user data */
copy_from_user(kvaddr, (char *)uaddr, length );
}
}
scsicmd->cmnd[0] = MEGADEVIOC;
scsicmd->request_buffer = (void *)&ioc;
init_MUTEX_LOCKED(&mimd_ioctl_sem);
IO_LOCK;
megaraid_queue(scsicmd, megadev_ioctl_done);
IO_UNLOCK;
down(&mimd_ioctl_sem);
if( !scsicmd->result && outlen ) {
copy_to_user(uaddr, kvaddr, length);
}
/*
* copyout the result
*/
uioc = (struct uioctl_t *)arg;
if( ioc.mbox[0] == MEGA_MBOXCMD_PASSTHRU ) {
put_user( scsicmd->result, &uioc->pthru.scsistatus );
} else {
put_user(1, &uioc->mbox[16]); /* numstatus */
/* status */
put_user (scsicmd->result, &uioc->mbox[17]);
}
if (kvaddr) {
dma_free_consistent(pdevp, length, kvaddr, dma_addr);
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0) /*0x20400 */
kfree (scsicmd);
#else
scsi_init_free((char *)scsicmd, sizeof(Scsi_Cmnd));
#endif
/* restore the user address */
ioc.ui.fcs.buffer = uaddr;
return ret;
case M_RD_IOCTL_CMD:
/* which adapter? */
adapno = ioc.ui.fcs.adapno;
/* See comment above: MEGAIOC_QADAPINFO */
adapno = GETADAP (adapno);
if (adapno >= numCtlrs)
return (-ENODEV);
/* save the user address */
uaddr = ioc.data;
outlen = ioc.outlen;
inlen = ioc.inlen;
if ((outlen >= IOCTL_MAX_DATALEN) || (inlen >= IOCTL_MAX_DATALEN))
return (-EINVAL);
if (outlen) {
ret = verify_area (VERIFY_WRITE, ioc.data, outlen);
if (ret) return ret;
}
if (inlen) {
ret = verify_area (VERIFY_READ, ioc.data, inlen);
if (ret) return ret;
}
/*
* Find this host
*/
for( shpnt = scsi_hostlist; shpnt; shpnt = shpnt->next ) {
if( shpnt->hostdata == (unsigned long *)megaCtlrs[adapno] ) {
megacfg = (mega_host_config *)shpnt->hostdata;
break;
}
}
if(shpnt == NULL) return -ENODEV;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
scsicmd = (Scsi_Cmnd *)kmalloc(sizeof(Scsi_Cmnd), GFP_KERNEL|GFP_DMA);
#else
scsicmd = (Scsi_Cmnd *)scsi_init_malloc(sizeof(Scsi_Cmnd),
GFP_ATOMIC | GFP_DMA);
#endif
if(scsicmd == NULL) return -ENOMEM;
memset(scsicmd, 0, sizeof(Scsi_Cmnd));
scsicmd->host = shpnt;
if (outlen || inlen) {
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
pdevp = &pdev;
memcpy(pdevp, megacfg->dev, sizeof(struct pci_dev));
pdevp->dma_mask = 0xffffffff;
#else
pdevp = NULL;
#endif
/*
* Allocate a page of kernel space.
*/
kvaddr = dma_alloc_consistent(pdevp, PAGE_SIZE, &dma_addr);
if( kvaddr == NULL ) {
printk (KERN_WARNING "megaraid:allocation failed\n");
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0) /*0x20400 */
kfree(scsicmd);
#else
scsi_init_free((char *)scsicmd, sizeof(Scsi_Cmnd));
#endif
return -ENOMEM;
}
ioc.data = kvaddr;
if (inlen) {
if (ioc.mbox[0] == MEGA_MBOXCMD_PASSTHRU) {
/* copyin the user data */
copy_from_user (kvaddr, uaddr, ioc.pthru.dataxferlen);
} else {
copy_from_user (kvaddr, uaddr, inlen);
}
}
}
scsicmd->cmnd[0] = MEGADEVIOC;
scsicmd->request_buffer = (void *) &ioc;
init_MUTEX_LOCKED (&mimd_ioctl_sem);
IO_LOCK;
megaraid_queue (scsicmd, megadev_ioctl_done);
IO_UNLOCK;
down (&mimd_ioctl_sem);
if (!scsicmd->result && outlen) {
if (ioc.mbox[0] == MEGA_MBOXCMD_PASSTHRU) {
copy_to_user (uaddr, kvaddr, ioc.pthru.dataxferlen);
} else {
copy_to_user (uaddr, kvaddr, outlen);
}
}
/*
* copyout the result
*/
uioc = (struct uioctl_t *) arg;
if (ioc.mbox[0] == MEGA_MBOXCMD_PASSTHRU) {
put_user (scsicmd->result, &uioc->pthru.scsistatus);
} else {
put_user (1, &uioc->mbox[16]); /* numstatus */
/* status */
put_user (scsicmd->result, &uioc->mbox[17]);
}
if (kvaddr) {
dma_free_consistent(pdevp, PAGE_SIZE, kvaddr, dma_addr );
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
kfree (scsicmd);
#else
scsi_init_free((char *)scsicmd, sizeof(Scsi_Cmnd));
#endif
/* restore user pointer */
ioc.data = uaddr;
return ret;
default:
return (-EINVAL);
}/* Outer switch */
return 0;
}
static void
megadev_ioctl_done(Scsi_Cmnd *sc)
{
up (&mimd_ioctl_sem);
}
static mega_scb *
megadev_doioctl (mega_host_config * megacfg, Scsi_Cmnd * sc)
{
u8 cmd;
struct uioctl_t *ioc = NULL;
mega_mailbox *mbox = NULL;
mega_ioctl_mbox *mboxioc = NULL;
struct mbox_passthru *mboxpthru = NULL;
mega_scb *scb = NULL;
mega_passthru *pthru = NULL;
if ((scb = mega_allocateSCB (megacfg, sc)) == NULL) {
sc->result = (DID_ERROR << 16);
callDone (sc);
return NULL;
}
ioc = (struct uioctl_t *) sc->request_buffer;
memcpy (scb->mboxData, ioc->mbox, sizeof (scb->mboxData));
/* The generic mailbox */
mbox = (mega_mailbox *) ioc->mbox;
/*
* Get the user command
*/
cmd = ioc->mbox[0];
switch (cmd) {
case MEGA_MBOXCMD_PASSTHRU:
/*
* prepare the SCB with information from the user ioctl structure
*/
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
pthru = scb->pthru;
#else
pthru = &scb->pthru;
#endif
memcpy (pthru, &ioc->pthru, sizeof (mega_passthru));
mboxpthru = (struct mbox_passthru *) scb->mboxData;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
if (megacfg->flag & BOARD_64BIT) {
/* This is just a sample with one element
* This if executes onlu on 2.4 kernels
*/
mboxpthru->dataxferaddr = scb->dma_passthruhandle64;
scb->sg64List[0].address =
pci_map_single (megacfg->dev,
ioc->data,
4096, PCI_DMA_BIDIRECTIONAL);
scb->sg64List[0].length = 4096; // TODO: Check this
pthru->dataxferaddr = scb->dma_sghandle64;
pthru->numsgelements = 1;
mboxpthru->cmd = 0xC3;
} else {
mboxpthru->dataxferaddr = scb->dma_passthruhandle64;
pthru->dataxferaddr =
pci_map_single (megacfg->dev,
ioc->data,
4096, PCI_DMA_BIDIRECTIONAL);
pthru->numsgelements = 0;
}
#else
{
mboxpthru->dataxferaddr = virt_to_bus (&scb->pthru);
pthru->dataxferaddr = virt_to_bus (ioc->data);
pthru->numsgelements = 0;
}
#endif
pthru->reqsenselen = 14;
break;
default: /* Normal command */
mboxioc = (mega_ioctl_mbox *) scb->mboxData;
if (ioc->ui.fcs.opcode == M_RD_IOCTL_CMD_NEW) {
scb->buff_ptr = ioc->ui.fcs.buffer;
scb->iDataSize = ioc->ui.fcs.length;
} else {
scb->buff_ptr = ioc->data;
scb->iDataSize = 4096; // TODO:check it
}
set_mbox_xfer_addr (megacfg, scb, mboxioc, FROMTO_DEVICE);
mboxioc->numsgelements = 0;
break;
}
return scb;
}
static int
megadev_close (struct inode *inode, struct file *filep)
{
#ifdef MODULE
MOD_DEC_USE_COUNT;
#endif
return 0;
}
static int
mega_support_ext_cdb(mega_host_config *this_hba)
{
mega_mailbox *mboxpnt;
unsigned char mbox[16];
int ret;
mboxpnt = (mega_mailbox *) mbox;
memset(mbox, 0, sizeof (mbox));
/*
* issue command to find out if controller supports extended CDBs.
*/
mbox[0] = 0xA4;
mbox[2] = 0x16;
ret = megaIssueCmd(this_hba, mbox, NULL, 0);
return !ret;
}
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,4,0)
void *
dma_alloc_consistent(void *dev, size_t size, dma_addr_t *dma_addr)
{
void *_tv;
int npages;
int order = 0;
/*
* How many pages application needs
*/
npages = size / PAGE_SIZE;
/* Do we need one more page */
if(size % PAGE_SIZE)
npages++;
order = mega_get_order(npages);
_tv = (void *)__get_free_pages(GFP_DMA, order);
if( _tv != NULL ) {
memset(_tv, 0, size);
*(dma_addr) = virt_to_bus(_tv);
}
return _tv;
}
/*
* int mega_get_order(int)
*
* returns the order to be used as 2nd argument to __get_free_pages() - which
* return pages equal to pow(2, order) - AM
*/
int
mega_get_order(int n)
{
int i = 0;
while( pow_2(i++) < n )
; /* null statement */
return i-1;
}
/*
* int pow_2(int)
*
* calculates pow(2, i)
*/
int
pow_2(int i)
{
unsigned int v = 1;
while(i--)
v <<= 1;
return v;
}
void
dma_free_consistent(void *dev, size_t size, void *vaddr, dma_addr_t dma_addr)
{
int npages;
int order = 0;
npages = size / PAGE_SIZE;
if(size % PAGE_SIZE)
npages++;
if (npages == 1)
order = 0;
else if (npages == 2)
order = 1;
else if (npages <= 4)
order = 2;
else
order = 3;
free_pages((unsigned long)vaddr, order);
}
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
static
#endif /* LINUX VERSION 2.4.XX */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0) || defined(MODULE)
Scsi_Host_Template driver_template = MEGARAID;
#include "scsi_module.c"
#endif /* LINUX VERSION 2.4.XX || MODULE */
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