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5637d5b769
This driver's original authors did pretty bad job of documenting the Command Control Block (CCB) structure -- especially its 2nd byte, where the bit numbers were completely left out. Sync up the 'struct ccb' comments to the Adaptec AHA-154xA manual. Link: https://lore.kernel.org/r/17a7be14-a9d2-9822-bb3e-1d7385f486b0@omprussia.ru Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Sergey Shtylyov <s.shtylyov@omprussia.ru> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
108 lines
3.7 KiB
C
108 lines
3.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _AHA1542_H_
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#define _AHA1542_H_
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#include <linux/types.h>
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/* I/O Port interface 4.2 */
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/* READ */
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#define STATUS(base) base
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#define STST BIT(7) /* Self Test in Progress */
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#define DIAGF BIT(6) /* Internal Diagnostic Failure */
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#define INIT BIT(5) /* Mailbox Initialization Required */
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#define IDLE BIT(4) /* SCSI Host Adapter Idle */
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#define CDF BIT(3) /* Command/Data Out Port Full */
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#define DF BIT(2) /* Data In Port Full */
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/* BIT(1) is reserved */
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#define INVDCMD BIT(0) /* Invalid H A Command */
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#define STATMASK (STST | DIAGF | INIT | IDLE | CDF | DF | INVDCMD)
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#define INTRFLAGS(base) (STATUS(base)+2)
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#define ANYINTR BIT(7) /* Any Interrupt */
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#define SCRD BIT(3) /* SCSI Reset Detected */
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#define HACC BIT(2) /* HA Command Complete */
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#define MBOA BIT(1) /* MBO Empty */
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#define MBIF BIT(0) /* MBI Full */
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#define INTRMASK (ANYINTR | SCRD | HACC | MBOA | MBIF)
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/* WRITE */
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#define CONTROL(base) STATUS(base)
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#define HRST BIT(7) /* Hard Reset */
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#define SRST BIT(6) /* Soft Reset */
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#define IRST BIT(5) /* Interrupt Reset */
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#define SCRST BIT(4) /* SCSI Bus Reset */
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/* READ/WRITE */
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#define DATA(base) (STATUS(base)+1)
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#define CMD_NOP 0x00 /* No Operation */
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#define CMD_MBINIT 0x01 /* Mailbox Initialization */
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#define CMD_START_SCSI 0x02 /* Start SCSI Command */
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#define CMD_INQUIRY 0x04 /* Adapter Inquiry */
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#define CMD_EMBOI 0x05 /* Enable MailBox Out Interrupt */
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#define CMD_BUSON_TIME 0x07 /* Set Bus-On Time */
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#define CMD_BUSOFF_TIME 0x08 /* Set Bus-Off Time */
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#define CMD_DMASPEED 0x09 /* Set AT Bus Transfer Speed */
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#define CMD_RETDEVS 0x0a /* Return Installed Devices */
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#define CMD_RETCONF 0x0b /* Return Configuration Data */
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#define CMD_RETSETUP 0x0d /* Return Setup Data */
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#define CMD_ECHO 0x1f /* ECHO Command Data */
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#define CMD_EXTBIOS 0x28 /* Return extend bios information only 1542C */
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#define CMD_MBENABLE 0x29 /* Set Mailbox Interface enable only 1542C */
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/* Mailbox Definition 5.2.1 and 5.2.2 */
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struct mailbox {
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u8 status; /* Command/Status */
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u8 ccbptr[3]; /* msb, .., lsb */
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};
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/* This is used with scatter-gather */
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struct chain {
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u8 datalen[3]; /* Size of this part of chain */
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u8 dataptr[3]; /* Location of data */
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};
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/* These belong in scsi.h also */
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static inline void any2scsi(u8 *p, u32 v)
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{
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p[0] = v >> 16;
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p[1] = v >> 8;
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p[2] = v;
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}
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#define scsi2int(up) ( (((long)*(up)) << 16) + (((long)(up)[1]) << 8) + ((long)(up)[2]) )
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#define xscsi2int(up) ( (((long)(up)[0]) << 24) + (((long)(up)[1]) << 16) \
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+ (((long)(up)[2]) << 8) + ((long)(up)[3]) )
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#define MAX_CDB 12
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#define MAX_SENSE 14
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/* Command Control Block (CCB), 5.3 */
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struct ccb {
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u8 op; /* Command Control Block Operation Code: */
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/* 0x00: SCSI Initiator CCB, 0x01: SCSI Target CCB, */
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/* 0x02: SCSI Initiator CCB with Scatter/Gather, */
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/* 0x81: SCSI Bus Device Reset CCB */
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u8 idlun; /* Address and Direction Control: */
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/* Bits 7-5: op=0, 2: Target ID, op=1: Initiator ID */
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/* Bit 4: Outbound data transfer, length is checked */
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/* Bit 3: Inbound data transfer, length is checked */
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/* Bits 2-0: Logical Unit Number */
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u8 cdblen; /* SCSI Command Length */
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u8 rsalen; /* Request Sense Allocation Length/Disable Auto Sense */
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u8 datalen[3]; /* Data Length (MSB, ..., LSB) */
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u8 dataptr[3]; /* Data Pointer (MSB, ..., LSB) */
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u8 linkptr[3]; /* Link Pointer (MSB, ..., LSB) */
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u8 commlinkid; /* Command Linking Identifier */
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u8 hastat; /* Host Adapter Status (HASTAT) */
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u8 tarstat; /* Target Device Status (TARSTAT) */
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u8 reserved[2];
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u8 cdb[MAX_CDB + MAX_SENSE]; /* SCSI Command Descriptor Block */
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/* followed by the Auto Sense data */
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};
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#define AHA1542_REGION_SIZE 4
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#define AHA1542_MAILBOXES 8
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#endif /* _AHA1542_H_ */
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