patch-2.4.23 linux-2.4.23/drivers/scsi/megaraid2.h

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diff -urN linux-2.4.22/drivers/scsi/megaraid2.h linux-2.4.23/drivers/scsi/megaraid2.h
@@ -0,0 +1,1187 @@
+#ifndef __MEGARAID_H__
+#define __MEGARAID_H__
+
+#include <linux/version.h>
+#include <linux/spinlock.h>
+
+
+#define MEGARAID_VERSION	\
+	"v2.00.9 (Release Date: Thu Sep  4 17:49:42 EDT 2003)\n"
+
+/*
+ * Driver features - change the values to enable or disable features in the
+ * driver.
+ */
+
+/*
+ * Comand coalescing - This feature allows the driver to be able to combine
+ * two or more commands and issue as one command in order to boost I/O
+ * performance. Useful if the nature of the I/O is sequential. It is not very
+ * useful for random natured I/Os.
+ */
+#define MEGA_HAVE_COALESCING	0
+
+/*
+ * Clustering support - Set this flag if you are planning to use the
+ * clustering services provided by the megaraid controllers and planning to
+ * setup a cluster
+ */
+#define MEGA_HAVE_CLUSTERING	1
+
+/*
+ * Driver statistics - Set this flag if you are interested in statics about
+ * number of I/O completed on each logical drive and how many interrupts
+ * generated. If enabled, this information is available through /proc
+ * interface and through the private ioctl. Setting this flag has a
+ * performance penalty.
+ */
+#define MEGA_HAVE_STATS		0
+
+/*
+ * Enhanced /proc interface - This feature will allow you to have a more
+ * detailed /proc interface for megaraid driver. E.g., a real time update of
+ * the status of the logical drives, battery status, physical drives etc.
+ */
+#define MEGA_HAVE_ENH_PROC	1
+
+#define MAX_DEV_TYPE	32
+
+#ifndef PCI_VENDOR_ID_LSI_LOGIC
+#define PCI_VENDOR_ID_LSI_LOGIC		0x1000
+#endif
+
+#ifndef PCI_VENDOR_ID_AMI
+#define PCI_VENDOR_ID_AMI		0x101E
+#endif
+
+#ifndef PCI_VENDOR_ID_DELL
+#define PCI_VENDOR_ID_DELL		0x1028
+#endif
+
+#ifndef PCI_VENDOR_ID_INTEL
+#define PCI_VENDOR_ID_INTEL		0x8086
+#endif
+
+#ifndef PCI_DEVICE_ID_AMI_MEGARAID
+#define PCI_DEVICE_ID_AMI_MEGARAID	0x9010
+#endif
+
+#ifndef PCI_DEVICE_ID_AMI_MEGARAID2
+#define PCI_DEVICE_ID_AMI_MEGARAID2	0x9060
+#endif
+
+#ifndef PCI_DEVICE_ID_AMI_MEGARAID3
+#define PCI_DEVICE_ID_AMI_MEGARAID3	0x1960
+#endif
+
+#define PCI_DEVICE_ID_DISCOVERY		0x000E
+#define PCI_DEVICE_ID_PERC4_DI		0x000F
+#define PCI_DEVICE_ID_PERC4_QC_VERDE	0x0407
+
+/* Sub-System Vendor IDs */
+#define	AMI_SUBSYS_VID			0x101E
+#define DELL_SUBSYS_VID			0x1028
+#define	HP_SUBSYS_VID			0x103C
+#define LSI_SUBSYS_VID			0x1000
+#define INTEL_SUBSYS_VID		0x8086
+
+#define HBA_SIGNATURE	      		0x3344
+#define HBA_SIGNATURE_471	  	0xCCCC
+#define HBA_SIGNATURE_64BIT		0x0299
+
+#define MBOX_BUSY_WAIT			10	/* wait for up to 10 usec for
+						   mailbox to be free */
+#define DEFAULT_INITIATOR_ID	7
+
+#define MAX_SGLIST		64	/* max supported in f/w */
+#define MIN_SGLIST		26	/* guaranteed to support these many */
+#define MAX_COMMANDS		126
+#define CMDID_INT_CMDS		MAX_COMMANDS+1	/* make sure CMDID_INT_CMDS
+					 	is less than max commands
+						supported by any f/w */
+
+#define MAX_CDB_LEN	     	10
+#define MAX_EXT_CDB_LEN		16	/* we support cdb length up to 16 */
+
+#define DEF_CMD_PER_LUN		63
+#define MAX_CMD_PER_LUN		MAX_COMMANDS
+#define MAX_FIRMWARE_STATUS	46
+#define MAX_XFER_PER_CMD	(64*1024)
+#define MAX_SECTORS_PER_IO	128
+
+#define MAX_LOGICAL_DRIVES_40LD		40
+#define FC_MAX_PHYSICAL_DEVICES		256
+#define MAX_LOGICAL_DRIVES_8LD		8
+#define MAX_CHANNELS			5
+#define MAX_TARGET			15
+#define MAX_PHYSICAL_DRIVES		MAX_CHANNELS*MAX_TARGET
+#define MAX_ROW_SIZE_40LD		32
+#define MAX_ROW_SIZE_8LD		8
+#define MAX_SPAN_DEPTH			8
+
+#define NVIRT_CHAN		4	/* # of virtual channels to represent
+					   up to 60 logical drives */
+
+#define MEGARAID						\
+{								\
+	.name =				"MegaRAID",		\
+	.proc_name =		 	"megaraid",		\
+	.detect =			megaraid_detect,	\
+	.release =			megaraid_release,	\
+	.info =				megaraid_info,		\
+	.command =			megaraid_command,	\
+	.queuecommand =			megaraid_queue,		\
+	.bios_param =			megaraid_biosparam,	\
+	.max_sectors =			MAX_SECTORS_PER_IO,	\
+	.can_queue =			MAX_COMMANDS,		\
+	.this_id =			DEFAULT_INITIATOR_ID,	\
+	.sg_tablesize =			MAX_SGLIST,		\
+	.cmd_per_lun =			DEF_CMD_PER_LUN,	\
+	.present =  			0,			\
+	.unchecked_isa_dma =		0,			\
+	.use_clustering =		ENABLE_CLUSTERING,	\
+	.use_new_eh_code =		1,			\
+	.eh_abort_handler =		megaraid_abort,		\
+	.eh_device_reset_handler =	megaraid_reset,		\
+	.eh_bus_reset_handler =		megaraid_reset,		\
+	.eh_host_reset_handler =	megaraid_reset,		\
+	.highmem_io =			1			\
+}
+
+
+
+typedef struct {
+	/* 0x0 */ u8 cmd;
+	/* 0x1 */ u8 cmdid;
+	/* 0x2 */ u16 numsectors;
+	/* 0x4 */ u32 lba;
+	/* 0x8 */ u32 xferaddr;
+	/* 0xC */ u8 logdrv;
+	/* 0xD */ u8 numsgelements;
+	/* 0xE */ u8 resvd;
+	/* 0xF */ volatile u8 busy;
+	/* 0x10 */ volatile u8 numstatus;
+	/* 0x11 */ volatile u8 status;
+	/* 0x12 */ volatile u8 completed[MAX_FIRMWARE_STATUS];
+	volatile u8 poll;
+	volatile u8 ack;
+} __attribute__ ((packed)) mbox_t;
+
+typedef struct {
+	u32 xfer_segment_lo;
+	u32 xfer_segment_hi;
+	mbox_t mbox;
+} __attribute__ ((packed)) mbox64_t;
+
+
+/*
+ * Passthru definitions
+ */
+#define MAX_REQ_SENSE_LEN       0x20
+
+typedef struct {
+	u8 timeout:3;		/* 0=6sec/1=60sec/2=10min/3=3hrs */
+	u8 ars:1;
+	u8 reserved:3;
+	u8 islogical:1;
+	u8 logdrv;		/* if islogical == 1 */
+	u8 channel;		/* if islogical == 0 */
+	u8 target;		/* if islogical == 0 */
+	u8 queuetag;		/* unused */
+	u8 queueaction;		/* unused */
+	u8 cdb[MAX_CDB_LEN];
+	u8 cdblen;
+	u8 reqsenselen;
+	u8 reqsensearea[MAX_REQ_SENSE_LEN];
+	u8 numsgelements;
+	u8 scsistatus;
+	u32 dataxferaddr;
+	u32 dataxferlen;
+} __attribute__ ((packed)) mega_passthru;
+
+
+/*
+ * Extended passthru: support CDB > 10 bytes
+ */
+typedef struct {
+	u8 timeout:3;		/* 0=6sec/1=60sec/2=10min/3=3hrs */
+	u8 ars:1;
+	u8 rsvd1:1;
+	u8 cd_rom:1;
+	u8 rsvd2:1;
+	u8 islogical:1;
+	u8 logdrv;		/* if islogical == 1 */
+	u8 channel;		/* if islogical == 0 */
+	u8 target;		/* if islogical == 0 */
+	u8 queuetag;		/* unused */
+	u8 queueaction;		/* unused */
+	u8 cdblen;
+	u8 rsvd3;
+	u8 cdb[MAX_EXT_CDB_LEN];
+	u8 numsgelements;
+	u8 status;
+	u8 reqsenselen;
+	u8 reqsensearea[MAX_REQ_SENSE_LEN];
+	u8 rsvd4;
+	u32 dataxferaddr;
+	u32 dataxferlen;
+} __attribute__ ((packed)) mega_ext_passthru;
+
+typedef struct {
+	u64 address;
+	u32 length;
+} __attribute__ ((packed)) mega_sgl64;
+
+typedef struct {
+	u32 address;
+	u32 length;
+} __attribute__ ((packed)) mega_sglist;
+
+
+/* Queued command data */
+typedef struct {
+	int	idx;
+	u32	state;
+	struct list_head	list;
+	u8	raw_mbox[66];
+	u32	dma_type;
+	u32	dma_direction;
+
+	Scsi_Cmnd	*cmd;
+	dma_addr_t	dma_h_bulkdata;
+	dma_addr_t	dma_h_sgdata;
+
+	mega_sglist	*sgl;
+	mega_sgl64	*sgl64;
+	dma_addr_t	sgl_dma_addr;
+
+	mega_passthru		*pthru;
+	dma_addr_t		pthru_dma_addr;
+	mega_ext_passthru	*epthru;
+	dma_addr_t		epthru_dma_addr;
+} scb_t;
+
+/*
+ * Flags to follow the scb as it transitions between various stages
+ */
+#define SCB_FREE	0x0000	/* on the free list */
+#define SCB_ACTIVE	0x0001	/* off the free list */
+#define SCB_PENDQ	0x0002	/* on the pending queue */
+#define SCB_ISSUED	0x0004	/* issued - owner f/w */
+#define SCB_ABORT	0x0008	/* Got an abort for this one */
+#define SCB_RESET	0x0010	/* Got a reset for this one */
+
+/*
+ * Utilities declare this strcture size as 1024 bytes. So more fields can
+ * be added in future.
+ */
+typedef struct {
+	u32	data_size; /* current size in bytes (not including resvd) */
+
+	u32	config_signature;
+		/* Current value is 0x00282008
+		 * 0x28=MAX_LOGICAL_DRIVES,
+		 * 0x20=Number of stripes and
+		 * 0x08=Number of spans */
+
+	u8	fw_version[16];		/* printable ASCI string */
+	u8	bios_version[16];	/* printable ASCI string */
+	u8	product_name[80];	/* printable ASCI string */
+
+	u8	max_commands;		/* Max. concurrent commands supported */
+	u8	nchannels;		/* Number of SCSI Channels detected */
+	u8	fc_loop_present;	/* Number of Fibre Loops detected */
+	u8	mem_type;		/* EDO, FPM, SDRAM etc */
+
+	u32	signature;
+	u16	dram_size;		/* In terms of MB */
+	u16	subsysid;
+
+	u16	subsysvid;
+	u8	notify_counters;
+	u8	pad1k[889];		/* 135 + 889 resvd = 1024 total size */
+} __attribute__ ((packed)) mega_product_info;
+
+struct notify {
+	u32 global_counter;	/* Any change increments this counter */
+
+	u8 param_counter;	/* Indicates any params changed  */
+	u8 param_id;		/* Param modified - defined below */
+	u16 param_val;		/* New val of last param modified */
+
+	u8 write_config_counter;	/* write config occurred */
+	u8 write_config_rsvd[3];
+
+	u8 ldrv_op_counter;	/* Indicates ldrv op started/completed */
+	u8 ldrv_opid;		/* ldrv num */
+	u8 ldrv_opcmd;		/* ldrv operation - defined below */
+	u8 ldrv_opstatus;	/* status of the operation */
+
+	u8 ldrv_state_counter;	/* Indicates change of ldrv state */
+	u8 ldrv_state_id;		/* ldrv num */
+	u8 ldrv_state_new;	/* New state */
+	u8 ldrv_state_old;	/* old state */
+
+	u8 pdrv_state_counter;	/* Indicates change of ldrv state */
+	u8 pdrv_state_id;		/* pdrv id */
+	u8 pdrv_state_new;	/* New state */
+	u8 pdrv_state_old;	/* old state */
+
+	u8 pdrv_fmt_counter;	/* Indicates pdrv format started/over */
+	u8 pdrv_fmt_id;		/* pdrv id */
+	u8 pdrv_fmt_val;		/* format started/over */
+	u8 pdrv_fmt_rsvd;
+
+	u8 targ_xfer_counter;	/* Indicates SCSI-2 Xfer rate change */
+	u8 targ_xfer_id;	/* pdrv Id  */
+	u8 targ_xfer_val;		/* new Xfer params of last pdrv */
+	u8 targ_xfer_rsvd;
+
+	u8 fcloop_id_chg_counter;	/* Indicates loopid changed */
+	u8 fcloopid_pdrvid;		/* pdrv id */
+	u8 fcloop_id0;			/* loopid on fc loop 0 */
+	u8 fcloop_id1;			/* loopid on fc loop 1 */
+
+	u8 fcloop_state_counter;	/* Indicates loop state changed */
+	u8 fcloop_state0;		/* state of fc loop 0 */
+	u8 fcloop_state1;		/* state of fc loop 1 */
+	u8 fcloop_state_rsvd;
+} __attribute__ ((packed));
+
+#define MAX_NOTIFY_SIZE     0x80
+#define CUR_NOTIFY_SIZE     sizeof(struct notify)
+
+typedef struct {
+	u32	data_size; /* current size in bytes (not including resvd) */
+
+	struct notify notify;
+
+	u8	notify_rsvd[MAX_NOTIFY_SIZE - CUR_NOTIFY_SIZE];
+
+	u8	rebuild_rate;		/* Rebuild rate (0% - 100%) */
+	u8	cache_flush_interval;	/* In terms of Seconds */
+	u8	sense_alert;
+	u8	drive_insert_count;	/* drive insertion count */
+
+	u8	battery_status;
+	u8	num_ldrv;		/* No. of Log Drives configured */
+	u8	recon_state[MAX_LOGICAL_DRIVES_40LD / 8];	/* State of
+							   reconstruct */
+	u16	ldrv_op_status[MAX_LOGICAL_DRIVES_40LD / 8]; /* logdrv
+								 Status */
+
+	u32	ldrv_size[MAX_LOGICAL_DRIVES_40LD];/* Size of each log drv */
+	u8	ldrv_prop[MAX_LOGICAL_DRIVES_40LD];
+	u8	ldrv_state[MAX_LOGICAL_DRIVES_40LD];/* State of log drives */
+	u8	pdrv_state[FC_MAX_PHYSICAL_DEVICES];/* State of phys drvs. */
+	u16	pdrv_format[FC_MAX_PHYSICAL_DEVICES / 16];
+
+	u8	targ_xfer[80];	/* phys device transfer rate */
+	u8	pad1k[263];	/* 761 + 263reserved = 1024 bytes total size */
+} __attribute__ ((packed)) mega_inquiry3;
+
+
+/* Structures */
+typedef struct {
+	u8	max_commands;	/* Max concurrent commands supported */
+	u8	rebuild_rate;	/* Rebuild rate - 0% thru 100% */
+	u8	max_targ_per_chan;	/* Max targ per channel */
+	u8	nchannels;	/* Number of channels on HBA */
+	u8	fw_version[4];	/* Firmware version */
+	u16	age_of_flash;	/* Number of times FW has been flashed */
+	u8	chip_set_value;	/* Contents of 0xC0000832 */
+	u8	dram_size;	/* In MB */
+	u8	cache_flush_interval;	/* in seconds */
+	u8	bios_version[4];
+	u8	board_type;
+	u8	sense_alert;
+	u8	write_config_count;	/* Increase with every configuration
+					   change */
+	u8	drive_inserted_count;	/* Increase with every drive inserted
+					 */
+	u8	inserted_drive;	/* Channel:Id of inserted drive */
+	u8	battery_status;	/*
+				 * BIT 0: battery module missing
+				 * BIT 1: VBAD
+				 * BIT 2: temprature high
+				 * BIT 3: battery pack missing
+				 * BIT 4,5:
+				 *   00 - charge complete
+				 *   01 - fast charge in progress
+				 *   10 - fast charge fail
+				 *   11 - undefined
+				 * Bit 6: counter > 1000
+				 * Bit 7: Undefined
+				 */
+	u8	dec_fault_bus_info;
+} __attribute__ ((packed)) mega_adp_info;
+
+
+typedef struct {
+	u8	num_ldrv;	/* Number of logical drives configured */
+	u8	rsvd[3];
+	u32	ldrv_size[MAX_LOGICAL_DRIVES_8LD];
+	u8	ldrv_prop[MAX_LOGICAL_DRIVES_8LD];
+	u8	ldrv_state[MAX_LOGICAL_DRIVES_8LD];
+} __attribute__ ((packed)) mega_ldrv_info;
+
+typedef struct {
+	u8	pdrv_state[MAX_PHYSICAL_DRIVES];
+	u8	rsvd;
+} __attribute__ ((packed)) mega_pdrv_info;
+
+/* RAID inquiry: Mailbox command 0x05*/
+typedef struct {
+	mega_adp_info	adapter_info;
+	mega_ldrv_info	logdrv_info;
+	mega_pdrv_info	pdrv_info;
+} __attribute__ ((packed)) mraid_inquiry;
+
+
+/* RAID extended inquiry: Mailbox command 0x04*/
+typedef struct {
+	mraid_inquiry	raid_inq;
+	u16	phys_drv_format[MAX_CHANNELS];
+	u8	stack_attn;
+	u8	modem_status;
+	u8	rsvd[2];
+} __attribute__ ((packed)) mraid_ext_inquiry;
+
+
+typedef struct {
+	u8	channel;
+	u8	target;
+}__attribute__ ((packed)) adp_device;
+
+typedef struct {
+	u32		start_blk;	/* starting block */
+	u32		num_blks;	/* # of blocks */
+	adp_device	device[MAX_ROW_SIZE_40LD];
+}__attribute__ ((packed)) adp_span_40ld;
+
+typedef struct {
+	u32		start_blk;	/* starting block */
+	u32		num_blks;	/* # of blocks */
+	adp_device	device[MAX_ROW_SIZE_8LD];
+}__attribute__ ((packed)) adp_span_8ld;
+
+typedef struct {
+	u8	span_depth;	/* Total # of spans */
+	u8	level;		/* RAID level */
+	u8	read_ahead;	/* read ahead, no read ahead, adaptive read
+				   ahead */
+	u8	stripe_sz;	/* Encoded stripe size */
+	u8	status;		/* Status of the logical drive */
+	u8	write_mode;	/* write mode, write_through/write_back */
+	u8	direct_io;	/* direct io or through cache */
+	u8	row_size;	/* Number of stripes in a row */
+} __attribute__ ((packed)) logdrv_param;
+
+typedef struct {
+	logdrv_param	lparam;
+	adp_span_40ld	span[MAX_SPAN_DEPTH];
+}__attribute__ ((packed)) logdrv_40ld;
+
+typedef struct {
+	logdrv_param	lparam;
+	adp_span_8ld	span[MAX_SPAN_DEPTH];
+}__attribute__ ((packed)) logdrv_8ld;
+
+typedef struct {
+	u8	type;		/* Type of the device */
+	u8	cur_status;	/* current status of the device */
+	u8	tag_depth;	/* Level of tagging */
+	u8	sync_neg;	/* sync negotiation - ENABLE or DISBALE */
+	u32	size;		/* configurable size in terms of 512 byte
+				   blocks */
+}__attribute__ ((packed)) phys_drv;
+
+typedef struct {
+	u8		nlog_drives;		/* number of logical drives */
+	u8		resvd[3];
+	logdrv_40ld	ldrv[MAX_LOGICAL_DRIVES_40LD];
+	phys_drv	pdrv[MAX_PHYSICAL_DRIVES];
+}__attribute__ ((packed)) disk_array_40ld;
+
+typedef struct {
+	u8		nlog_drives;	/* number of logical drives */
+	u8		resvd[3];
+	logdrv_8ld	ldrv[MAX_LOGICAL_DRIVES_8LD];
+	phys_drv	pdrv[MAX_PHYSICAL_DRIVES];
+}__attribute__ ((packed)) disk_array_8ld;
+
+/*
+ *    FW Definitions & Data Structures for 8LD 4-Span and 8-Span Controllers
+ */
+#define	MAX_STRIPES	8
+#define SPAN4_DEPTH	4
+#define SPAN8_DEPTH	8
+#define MAX_PHYDRVS	5 * 16	/* 5 Channels * 16 Targets */
+
+typedef struct  {
+	unsigned char	channel;
+	unsigned char	target; 
+}__attribute__ ((packed)) device_t;
+
+typedef struct { 
+	unsigned long	start_blk;
+	unsigned long	total_blks;
+	device_t	device[ MAX_STRIPES ];
+}__attribute__ ((packed)) span_t;
+
+typedef struct {
+	unsigned char	type;
+	unsigned char	curr_status;
+	unsigned char	tag_depth;
+	unsigned char	resvd1;
+	unsigned long	size;
+}__attribute__ ((packed)) phydrv_t;
+
+typedef struct { 
+	unsigned char	span_depth;
+	unsigned char	raid;
+	unsigned char	read_ahead;	/* 0=No rdahead,1=RDAHEAD,2=adaptive */ 
+	unsigned char	stripe_sz;
+	unsigned char	status;
+	unsigned char	write_policy;	/* 0=wrthru,1=wrbak */ 
+	unsigned char	direct_io;   	/* 1=directio,0=cached */ 
+	unsigned char	no_stripes;
+	span_t		span[ SPAN4_DEPTH ];
+}__attribute__ ((packed)) ld_span4_t;
+
+typedef struct { 
+	unsigned char	span_depth;
+	unsigned char	raid;
+	unsigned char	read_ahead;	/* 0=No rdahead,1=RDAHEAD,2=adaptive */ 
+	unsigned char	stripe_sz;
+	unsigned char	status;
+	unsigned char	write_policy;	/* 0=wrthru,1=wrbak */ 
+	unsigned char	direct_io;   	/* 1=directio,0=cached */ 
+	unsigned char	no_stripes;
+	span_t		span[ SPAN8_DEPTH ];
+}__attribute__ ((packed)) ld_span8_t;
+
+typedef struct { 
+	unsigned char	no_log_drives;
+	unsigned char	pad[3];
+	ld_span4_t	log_drv[ MAX_LOGICAL_DRIVES_8LD ];
+	phydrv_t	phys_drv[ MAX_PHYDRVS ];
+}__attribute__ ((packed)) diskarray_span4_t;
+
+typedef struct { 
+	unsigned char	no_log_drives;
+	unsigned char	pad[3];
+	ld_span8_t	log_drv[ MAX_LOGICAL_DRIVES_8LD ];
+	phydrv_t	phys_drv[ MAX_PHYDRVS ];
+}__attribute__ ((packed)) diskarray_span8_t;
+
+/*
+ * User ioctl structure.
+ * This structure will be used for Traditional Method ioctl interface
+ * commands (0x80),Alternate Buffer Method (0x81) ioctl commands and the
+ * Driver ioctls.
+ * The Driver ioctl interface handles the commands at the driver level,
+ * without being sent to the card.
+ */
+/* system call imposed limit. Change accordingly */
+#define IOCTL_MAX_DATALEN       4096
+
+struct uioctl_t {
+	u32 inlen;
+	u32 outlen;
+	union {
+		u8 fca[16];
+		struct {
+			u8 opcode;
+			u8 subopcode;
+			u16 adapno;
+#if BITS_PER_LONG == 32
+			u8 *buffer;
+			u8 pad[4];
+#endif
+#if BITS_PER_LONG == 64
+			u8 *buffer;
+#endif
+			u32 length;
+		} __attribute__ ((packed)) fcs;
+	} __attribute__ ((packed)) ui;
+	u8 mbox[18];		/* 16 bytes + 2 status bytes */
+	mega_passthru pthru;
+#if BITS_PER_LONG == 32
+	char *data;		/* buffer <= 4096 for 0x80 commands */
+	char pad[4];
+#endif
+#if BITS_PER_LONG == 64
+	char *data;
+#endif
+} __attribute__ ((packed));
+
+/*
+ * struct mcontroller is used to pass information about the controllers in the
+ * system. Its upto the application how to use the information. We are passing
+ * as much info about the cards as possible and useful. Before issuing the
+ * call to find information about the cards, the applicaiton needs to issue a
+ * ioctl first to find out the number of controllers in the system.
+ */
+#define MAX_CONTROLLERS 32
+
+struct mcontroller {
+	u64 base;
+	u8 irq;
+	u8 numldrv;
+	u8 pcibus;
+	u16 pcidev;
+	u8 pcifun;
+	u16 pciid;
+	u16 pcivendor;
+	u8 pcislot;
+	u32 uid;
+};
+
+/*
+ * mailbox structure used for internal commands
+ */
+typedef struct {
+	u8	cmd;
+	u8	cmdid;
+	u8	opcode;
+	u8	subopcode;
+	u32	lba;
+	u32	xferaddr;
+	u8	logdrv;
+	u8	rsvd[3];
+	u8	numstatus;
+	u8	status;
+} __attribute__ ((packed)) megacmd_t;
+
+/*
+ * Defines for Driver IOCTL interface
+ */
+#define MEGAIOC_MAGIC  	'm'
+
+#define MEGAIOC_QNADAP		'm'	/* Query # of adapters */
+#define MEGAIOC_QDRVRVER	'e'	/* Query driver version */
+#define MEGAIOC_QADAPINFO   	'g'	/* Query adapter information */
+#define MKADAP(adapno)	  	(MEGAIOC_MAGIC << 8 | (adapno) )
+#define GETADAP(mkadap)	 	( (mkadap) ^ MEGAIOC_MAGIC << 8 )
+
+/*
+ * Definition for the new ioctl interface (NIT)
+ */
+
+/*
+ * Vendor specific Group-7 commands
+ */
+#define VENDOR_SPECIFIC_COMMANDS	0xE0
+#define MEGA_INTERNAL_CMD		VENDOR_SPECIFIC_COMMANDS + 0x01
+
+/*
+ * The ioctl command. No other command shall be used for this interface
+ */
+#define USCSICMD	VENDOR_SPECIFIC_COMMANDS
+
+/*
+ * Data direction flags
+ */
+#define UIOC_RD		0x00001
+#define UIOC_WR		0x00002
+
+/*
+ * ioctl opcodes
+ */
+#define MBOX_CMD	0x00000	/* DCMD or passthru command */
+#define GET_DRIVER_VER	0x10000	/* Get driver version */
+#define GET_N_ADAP	0x20000	/* Get number of adapters */
+#define GET_ADAP_INFO	0x30000	/* Get information about a adapter */
+#define GET_CAP		0x40000	/* Get ioctl capabilities */
+#define GET_STATS	0x50000	/* Get statistics, including error info */
+
+
+/*
+ * The ioctl structure.
+ * MBOX macro converts a nitioctl_t structure to megacmd_t pointer and
+ * MBOX_P macro converts a nitioctl_t pointer to megacmd_t pointer.
+ */
+typedef struct {
+	char		signature[8];	/* Must contain "MEGANIT" */
+	u32		opcode;		/* opcode for the command */
+	u32		adapno;		/* adapter number */
+	union {
+		u8	__raw_mbox[18];
+		caddr_t	__uaddr; /* xferaddr for non-mbox cmds */
+	}__ua;
+
+#define uioc_rmbox	__ua.__raw_mbox
+#define MBOX(uioc)	((megacmd_t *)&((uioc).__ua.__raw_mbox[0]))
+#define MBOX_P(uioc)	((megacmd_t *)&((uioc)->__ua.__raw_mbox[0]))
+#define uioc_uaddr	__ua.__uaddr
+
+	u32		xferlen;	/* xferlen for DCMD and non-mbox
+					   commands */
+	u32		flags;		/* data direction flags */
+}nitioctl_t;
+
+
+/*
+ * I/O statistics for some applications like SNMP agent. The caller must
+ * provide the number of logical drives for which status should be reported.
+ */
+typedef struct {
+	int	num_ldrv;	/* Number for logical drives for which the
+				   status should be reported. */
+	u32	nreads[MAX_LOGICAL_DRIVES_40LD];	/* number of reads for
+							each logical drive */
+	u32	nreadblocks[MAX_LOGICAL_DRIVES_40LD];	/* number of blocks
+							read for each logical
+							drive */
+	u32	nwrites[MAX_LOGICAL_DRIVES_40LD];	/* number of writes
+							for each logical
+							drive */
+	u32	nwriteblocks[MAX_LOGICAL_DRIVES_40LD];	/* number of blocks
+							writes for each
+							logical drive */
+	u32	rd_errors[MAX_LOGICAL_DRIVES_40LD];	/* number of read
+							   errors for each
+							   logical drive */
+	u32	wr_errors[MAX_LOGICAL_DRIVES_40LD];	/* number of write
+							   errors for each
+							   logical drive */
+}megastat_t;
+
+
+struct private_bios_data {
+	u8	geometry:4;	/*
+				 * bits 0-3 - BIOS geometry
+				 * 0x0001 - 1GB
+				 * 0x0010 - 2GB
+				 * 0x1000 - 8GB
+				 * Others values are invalid
+							 */
+	u8	unused:4;	/* bits 4-7 are unused */
+	u8	boot_drv;	/*
+				 * logical drive set as boot drive
+				 * 0..7 - for 8LD cards
+				 * 0..39 - for 40LD cards
+				 */
+	u8	rsvd[12];
+	u16	cksum;	/* 0-(sum of first 13 bytes of this structure) */
+} __attribute__ ((packed));
+
+
+
+
+/*
+ * Mailbox and firmware commands and subopcodes used in this driver.
+ */
+
+#define MEGA_MBOXCMD_LREAD	0x01
+#define MEGA_MBOXCMD_LWRITE	0x02
+#define MEGA_MBOXCMD_PASSTHRU	0x03
+#define MEGA_MBOXCMD_ADPEXTINQ	0x04
+#define MEGA_MBOXCMD_ADAPTERINQ	0x05
+#define MEGA_MBOXCMD_LREAD64	0xA7
+#define MEGA_MBOXCMD_LWRITE64	0xA8
+#define MEGA_MBOXCMD_PASSTHRU64	0xC3
+#define MEGA_MBOXCMD_EXTPTHRU	0xE3
+
+#define MAIN_MISC_OPCODE	0xA4	/* f/w misc opcode */
+#define GET_MAX_SG_SUPPORT	0x01	/* get max sg len supported by f/w */
+
+#define FC_NEW_CONFIG		0xA1
+#define NC_SUBOP_PRODUCT_INFO	0x0E
+#define NC_SUBOP_ENQUIRY3	0x0F
+#define ENQ3_GET_SOLICITED_FULL	0x02
+#define OP_DCMD_READ_CONFIG	0x04
+#define NEW_READ_CONFIG_8LD	0x67
+#define READ_CONFIG_8LD		0x07
+#define FLUSH_ADAPTER		0x0A
+#define FLUSH_SYSTEM		0xFE
+
+/*
+ * Command for random deletion of logical drives
+ */
+#define	FC_DEL_LOGDRV		0xA4	/* f/w command */
+#define	OP_SUP_DEL_LOGDRV	0x2A	/* is feature supported */
+#define OP_GET_LDID_MAP		0x18	/* get ldid and logdrv number map */
+#define OP_DEL_LOGDRV		0x1C	/* delete logical drive */
+
+/*
+ * BIOS commands
+ */
+#define IS_BIOS_ENABLED		0x62
+#define GET_BIOS		0x01
+#define CHNL_CLASS		0xA9
+#define GET_CHNL_CLASS		0x00
+#define SET_CHNL_CLASS		0x01
+#define CH_RAID			0x01
+#define CH_SCSI			0x00
+#define BIOS_PVT_DATA		0x40
+#define GET_BIOS_PVT_DATA	0x00
+
+
+/*
+ * Commands to support clustering
+ */
+#define MEGA_GET_TARGET_ID	0x7D
+#define MEGA_CLUSTER_OP		0x70
+#define MEGA_GET_CLUSTER_MODE	0x02
+#define MEGA_CLUSTER_CMD	0x6E
+#define MEGA_RESERVE_LD		0x01
+#define MEGA_RELEASE_LD		0x02
+#define MEGA_RESET_RESERVATIONS	0x03
+#define MEGA_RESERVATION_STATUS	0x04
+#define MEGA_RESERVE_PD		0x05
+#define MEGA_RELEASE_PD		0x06
+
+
+/*
+ * Module battery status
+ */
+#define MEGA_BATT_MODULE_MISSING	0x01
+#define MEGA_BATT_LOW_VOLTAGE		0x02
+#define MEGA_BATT_TEMP_HIGH		0x04
+#define MEGA_BATT_PACK_MISSING		0x08
+#define MEGA_BATT_CHARGE_MASK		0x30
+#define MEGA_BATT_CHARGE_DONE		0x00
+#define MEGA_BATT_CHARGE_INPROG		0x10
+#define MEGA_BATT_CHARGE_FAIL		0x20
+#define MEGA_BATT_CYCLES_EXCEEDED	0x40
+
+/*
+ * Physical drive states.
+ */
+#define PDRV_UNCNF	0
+#define PDRV_ONLINE	3
+#define PDRV_FAILED	4
+#define PDRV_RBLD	5
+#define PDRV_HOTSPARE	6
+
+
+/*
+ * Raid logical drive states.
+ */
+#define RDRV_OFFLINE	0
+#define RDRV_DEGRADED	1
+#define RDRV_OPTIMAL	2
+#define RDRV_DELETED	3
+
+/*
+ * Read, write and cache policies
+ */
+#define NO_READ_AHEAD		0
+#define READ_AHEAD		1
+#define ADAP_READ_AHEAD		2
+#define WRMODE_WRITE_THRU	0
+#define WRMODE_WRITE_BACK	1
+#define CACHED_IO		0
+#define DIRECT_IO		1
+
+
+/*
+ * Each controller's soft state
+ */
+typedef struct {
+	int	this_id;	/* our id, may set to different than 7 if
+				   clustering is available */
+	u32	flag;
+
+	unsigned long	base;
+
+	/* mbox64 with mbox not aligned on 16-byte boundry */
+	mbox64_t	*una_mbox64;
+	dma_addr_t	una_mbox64_dma;
+
+	volatile mbox64_t	*mbox64;/* ptr to 64-bit mailbox */
+	volatile mbox_t		*mbox;	/* ptr to standard mailbox */
+	dma_addr_t		mbox_dma;
+
+	struct pci_dev	*dev;
+	struct pci_dev	*ipdev;		/* for internal allocation */
+
+	struct list_head	free_list;
+	struct list_head	pending_list;
+
+	struct Scsi_Host	*host;
+
+#define MEGA_BUFFER_SIZE (2*1024)
+	u8		*mega_buffer;
+	dma_addr_t	buf_dma_handle;
+
+	mega_product_info	product_info;
+
+	u8		max_cmds;
+	scb_t		*scb_list;
+
+	atomic_t	pend_cmds;	/* maintain a counter for
+					pending commands in firmware */
+
+#if MEGA_HAVE_STATS
+	u32	nreads[MAX_LOGICAL_DRIVES_40LD];
+	u32	nreadblocks[MAX_LOGICAL_DRIVES_40LD];
+	u32	nwrites[MAX_LOGICAL_DRIVES_40LD];
+	u32	nwriteblocks[MAX_LOGICAL_DRIVES_40LD];
+	u32	rd_errors[MAX_LOGICAL_DRIVES_40LD];
+	u32	wr_errors[MAX_LOGICAL_DRIVES_40LD];
+#endif
+
+	/* Host adapter parameters */
+	u8	numldrv;
+	u8	fw_version[7];
+	u8	bios_version[7];
+
+#ifdef CONFIG_PROC_FS
+	struct proc_dir_entry	*controller_proc_dir_entry;
+	struct proc_dir_entry	*proc_read;
+	struct proc_dir_entry	*proc_stat;
+	struct proc_dir_entry	*proc_mbox;
+
+#if MEGA_HAVE_ENH_PROC
+	struct proc_dir_entry	*proc_rr;
+	struct proc_dir_entry	*proc_battery;
+#define MAX_PROC_CHANNELS	4
+	struct proc_dir_entry	*proc_pdrvstat[MAX_PROC_CHANNELS];
+	struct proc_dir_entry	*proc_rdrvstat[MAX_PROC_CHANNELS];
+#endif
+
+#endif
+
+	int	has_64bit_addr;		/* are we using 64-bit addressing */
+	int	support_ext_cdb;
+	int	boot_ldrv_enabled;
+	int	boot_ldrv;
+	int	boot_pdrv_enabled;	/* boot from physical drive */
+	int	boot_pdrv_ch;		/* boot physical drive channel */
+	int	boot_pdrv_tgt;		/* boot physical drive target */
+
+
+	int	support_random_del;	/* Do we support random deletion of
+					   logdrvs */
+	int	read_ldidmap;	/* set after logical drive deltion. The
+				   logical drive number must be read from the
+				   map */
+	atomic_t	quiescent;	/* a stage reached when delete logical
+					   drive needs to be done. Stop
+					   sending requests to the hba till
+					   delete operation is completed */
+	spinlock_t	lock;
+	spinlock_t	*host_lock;	// pointer to appropriate lock
+
+	u8	logdrv_chan[MAX_CHANNELS+NVIRT_CHAN]; /* logical drive are on
+							what channels. */
+	int	mega_ch_class;
+
+	u8	sglen;	/* f/w supported scatter-gather list length */
+
+	scb_t			int_scb;
+	Scsi_Cmnd		int_scmd;
+	struct semaphore	int_mtx;	/* To synchronize the internal
+						commands */
+	wait_queue_head_t	int_waitq;	/* wait queue for internal
+						 cmds */
+
+	int	has_cluster;	/* cluster support on this HBA */
+}adapter_t;
+
+
+struct mega_hbas {
+	int is_bios_enabled;
+	adapter_t *hostdata_addr;
+};
+
+
+/*
+ * For state flag. Do not use LSB(8 bits) which are
+ * reserved for storing info about channels.
+ */
+#define IN_ABORT	0x80000000L
+#define IN_RESET	0x40000000L
+#define BOARD_MEMMAP	0x20000000L
+#define BOARD_IOMAP	0x10000000L
+#define BOARD_40LD   	0x08000000L
+#define BOARD_64BIT	0x04000000L
+
+#define INTR_VALID			0x40
+
+#define PCI_CONF_AMISIG			0xa0
+#define PCI_CONF_AMISIG64		0xa4
+
+
+#define MEGA_DMA_TYPE_NONE		0xFFFF
+#define MEGA_BULK_DATA			0x0001
+#define MEGA_SGLIST			0x0002
+
+/*
+ * lockscope definitions, callers can specify the lock scope with this data
+ * type. LOCK_INT would mean the caller has not acquired the lock before
+ * making the call and LOCK_EXT would mean otherwise.
+ */
+typedef enum { LOCK_INT, LOCK_EXT } lockscope_t;
+
+/*
+ * Parameters for the io-mapped controllers
+ */
+
+/* I/O Port offsets */
+#define CMD_PORT	 	0x00
+#define ACK_PORT	 	0x00
+#define TOGGLE_PORT		0x01
+#define INTR_PORT	  	0x0a
+
+#define MBOX_BUSY_PORT     	0x00
+#define MBOX_PORT0	 	0x04
+#define MBOX_PORT1	 	0x05
+#define MBOX_PORT2	 	0x06
+#define MBOX_PORT3	 	0x07
+#define ENABLE_MBOX_REGION 	0x0B
+
+/* I/O Port Values */
+#define ISSUE_BYTE	 	0x10
+#define ACK_BYTE	   	0x08
+#define ENABLE_INTR_BYTE   	0xc0
+#define DISABLE_INTR_BYTE  	0x00
+#define VALID_INTR_BYTE    	0x40
+#define MBOX_BUSY_BYTE     	0x10
+#define ENABLE_MBOX_BYTE   	0x00
+
+
+/* Setup some port macros here */
+#define issue_command(adapter)	\
+		outb_p(ISSUE_BYTE, (adapter)->base + CMD_PORT)
+
+#define irq_state(adapter)	inb_p((adapter)->base + INTR_PORT)
+
+#define set_irq_state(adapter, value)	\
+		outb_p((value), (adapter)->base + INTR_PORT)
+
+#define irq_ack(adapter)	\
+		outb_p(ACK_BYTE, (adapter)->base + ACK_PORT)
+
+#define irq_enable(adapter)	\
+	outb_p(ENABLE_INTR_BYTE, (adapter)->base + TOGGLE_PORT)
+
+#define irq_disable(adapter)	\
+	outb_p(DISABLE_INTR_BYTE, (adapter)->base + TOGGLE_PORT)
+
+
+/*
+ * This is our SYSDEP area. All kernel specific detail should be placed here -
+ * as much as possible
+ */
+
+/*
+ * End of SYSDEP area
+ */
+
+/*
+ * ASSERT macro for megaraid. This should panic but printk should do for now
+ */
+#ifdef DEBUG
+#define ASSERT( expression )						\
+	if( !(expression) ) {						\
+		panic("assertion failed: %s, file: %s, line: %d\n",	\
+				#expression, __FILE__, __LINE__);	\
+	}
+#else
+#define ASSERT(expression)
+#endif
+
+#define MBOX_ABORT_SLEEP	60
+#define MBOX_RESET_SLEEP	30
+
+const char *megaraid_info (struct Scsi_Host *);
+
+static int megaraid_detect(Scsi_Host_Template *);
+static void mega_find_card(Scsi_Host_Template *, u16, u16);
+static int mega_query_adapter(adapter_t *);
+static inline int issue_scb(adapter_t *, scb_t *);
+static int mega_setup_mailbox(adapter_t *);
+
+static int megaraid_queue (Scsi_Cmnd *, void (*)(Scsi_Cmnd *));
+static scb_t * mega_build_cmd(adapter_t *, Scsi_Cmnd *, int *);
+static inline scb_t *mega_allocate_scb(adapter_t *, Scsi_Cmnd *);
+static void __mega_runpendq(adapter_t *);
+static inline void mega_runpendq(adapter_t *);
+static int issue_scb_block(adapter_t *, u_char *);
+
+static void megaraid_isr_memmapped(int, void *, struct pt_regs *);
+static inline void megaraid_memmbox_ack_sequence(adapter_t *);
+static void megaraid_isr_iomapped(int, void *, struct pt_regs *);
+static inline void megaraid_iombox_ack_sequence(adapter_t *);
+
+static void mega_free_scb(adapter_t *, scb_t *);
+
+static int megaraid_release (struct Scsi_Host *);
+static int megaraid_command (Scsi_Cmnd *);
+static int megaraid_abort(Scsi_Cmnd *);
+static int megaraid_reset(Scsi_Cmnd *);
+static int megaraid_biosparam (Disk *, kdev_t, int *);
+
+static int mega_build_sglist (adapter_t *adapter, scb_t *scb,
+			      u32 *buffer, u32 *length);
+static inline int mega_busywait_mbox (adapter_t *);
+static int __mega_busywait_mbox (adapter_t *);
+static inline void mega_cmd_done(adapter_t *, u8 [], int, int);
+static inline void mega_free_sgl (adapter_t *adapter);
+static void mega_8_to_40ld (mraid_inquiry *inquiry,
+		mega_inquiry3 *enquiry3, mega_product_info *);
+
+static int megaraid_reboot_notify (struct notifier_block *,
+				   unsigned long, void *);
+static int megadev_open (struct inode *, struct file *);
+static int megadev_ioctl (struct inode *, struct file *, unsigned int,
+		unsigned long);
+static int mega_m_to_n(void *, nitioctl_t *);
+static int mega_n_to_m(void *, megacmd_t *);
+static int megadev_close (struct inode *, struct file *);
+
+static int mega_init_scb (adapter_t *);
+
+static int mega_is_bios_enabled (adapter_t *);
+static void mega_reorder_hosts (void);
+static void mega_swap_hosts (struct Scsi_Host *, struct Scsi_Host *);
+
+#ifdef CONFIG_PROC_FS
+static void mega_create_proc_entry(int, struct proc_dir_entry *);
+static int proc_read_config(char *, char **, off_t, int, int *, void *);
+static int proc_read_stat(char *, char **, off_t, int, int *, void *);
+static int proc_read_mbox(char *, char **, off_t, int, int *, void *);
+static int proc_rebuild_rate(char *, char **, off_t, int, int *, void *);
+static int proc_battery(char *, char **, off_t, int, int *, void *);
+static int proc_pdrv_ch0(char *, char **, off_t, int, int *, void *);
+static int proc_pdrv_ch1(char *, char **, off_t, int, int *, void *);
+static int proc_pdrv_ch2(char *, char **, off_t, int, int *, void *);
+static int proc_pdrv_ch3(char *, char **, off_t, int, int *, void *);
+static int proc_pdrv(adapter_t *, char *, int);
+static int proc_rdrv_10(char *, char **, off_t, int, int *, void *);
+static int proc_rdrv_20(char *, char **, off_t, int, int *, void *);
+static int proc_rdrv_30(char *, char **, off_t, int, int *, void *);
+static int proc_rdrv_40(char *, char **, off_t, int, int *, void *);
+static int proc_rdrv(adapter_t *, char *, int, int);
+
+static int mega_adapinq(adapter_t *, dma_addr_t);
+static int mega_internal_dev_inquiry(adapter_t *, u8, u8, dma_addr_t);
+static inline caddr_t mega_allocate_inquiry(dma_addr_t *, struct pci_dev *);
+static inline void mega_free_inquiry(caddr_t, dma_addr_t, struct pci_dev *);
+static int mega_print_inquiry(char *, char *);
+#endif
+
+static int mega_support_ext_cdb(adapter_t *);
+static mega_passthru* mega_prepare_passthru(adapter_t *, scb_t *,
+		Scsi_Cmnd *, int, int);
+static mega_ext_passthru* mega_prepare_extpassthru(adapter_t *,
+		scb_t *, Scsi_Cmnd *, int, int);
+static void mega_enum_raid_scsi(adapter_t *);
+static int mega_partsize(Disk *, kdev_t, int *);
+static void mega_get_boot_drv(adapter_t *);
+static inline int mega_get_ldrv_num(adapter_t *, Scsi_Cmnd *, int);
+static int mega_support_random_del(adapter_t *);
+static int mega_del_logdrv(adapter_t *, int);
+static int mega_do_del_logdrv(adapter_t *, int);
+static void mega_get_max_sgl(adapter_t *);
+static int mega_internal_command(adapter_t *, lockscope_t, megacmd_t *,
+		mega_passthru *);
+static void mega_internal_done(Scsi_Cmnd *);
+static int mega_support_cluster(adapter_t *);
+#endif
+
+/* vi: set ts=8 sw=8 tw=78: */
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)