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GNU Mach 1.0
/*
* eata.c - Low-level driver for EATA/DMA SCSI host adapters.
*
* 6 Jul 1995 rev. 2.01 for linux 1.3.7
* Update required by the new /proc/scsi support.
*
* 11 Mar 1995 rev. 2.00 for linux 1.2.0
* Fixed a bug which prevented media change detection for removable
* disk drives.
*
* 23 Feb 1995 rev. 1.18 for linux 1.1.94
* Added a check for scsi_register returning NULL.
*
* 11 Feb 1995 rev. 1.17 for linux 1.1.91
* Now DEBUG_RESET is disabled by default.
* Register a board even if it does not assert DMA protocol support
* (DPT SK2011B does not report correctly the dmasup bit).
*
* 9 Feb 1995 rev. 1.16 for linux 1.1.90
* Use host->wish_block instead of host->block.
* New list of Data Out SCSI commands.
*
* 8 Feb 1995 rev. 1.15 for linux 1.1.89
* Cleared target_time_out counter while performing a reset.
* All external symbols renamed to avoid possible name conflicts.
*
* 28 Jan 1995 rev. 1.14 for linux 1.1.86
* Added module support.
* Log and do a retry when a disk drive returns a target status
* different from zero on a recovered error.
*
* 24 Jan 1995 rev. 1.13 for linux 1.1.85
* Use optimized board configuration, with a measured performance
* increase in the range 10%-20% on i/o throughput.
*
* 16 Jan 1995 rev. 1.12 for linux 1.1.81
* Fix mscp structure comments (no functional change).
* Display a message if check_region detects a port address
* already in use.
*
* 17 Dec 1994 rev. 1.11 for linux 1.1.74
* Use the scsicam_bios_param routine. This allows an easy
* migration path from disk partition tables created using
* different SCSI drivers and non optimal disk geometry.
*
* 15 Dec 1994 rev. 1.10 for linux 1.1.74
* Added support for ISA EATA boards (DPT PM2011, DPT PM2021).
* The host->block flag is set for all the detected ISA boards.
* The detect routine no longer enforces LEVEL triggering
* for EISA boards, it just prints a warning message.
*
* 30 Nov 1994 rev. 1.09 for linux 1.1.68
* Redo i/o on target status CHECK_CONDITION for TYPE_DISK only.
* Added optional support for using a single board at a time.
*
* 18 Nov 1994 rev. 1.08 for linux 1.1.64
* Forces sg_tablesize = 64 and can_queue = 64 if these
* values are not correctly detected (DPT PM2012).
*
* 14 Nov 1994 rev. 1.07 for linux 1.1.63 Final BETA release.
* 04 Aug 1994 rev. 1.00 for linux 1.1.39 First BETA release.
*
*
* This driver is based on the CAM (Common Access Method Committee)
* EATA (Enhanced AT Bus Attachment) rev. 2.0A, using DMA protocol.
*
* Copyright (C) 1994, 1995 Dario Ballabio ([email protected])
*
*/
/*
*
* Here is a brief description of the DPT SCSI host adapters.
* All these boards provide an EATA/DMA compatible programming interface
* and are fully supported by this driver:
*
* PM2011B/9X - Entry Level ISA
* PM2021A/9X - High Performance ISA
* PM2012A Old EISA
* PM2012B Old EISA
* PM2022A/9X - Entry Level EISA
* PM2122A/9X - High Performance EISA
* PM2322A/9X - Extra High Performance EISA
*
* The DPT PM2001 provides only the EATA/PIO interface and hence is not
* supported by this driver.
*
* This code has been tested with up to 3 Distributed Processing Technology
* PM2122A/9X (DPT SCSI BIOS v002.D1, firmware v05E.0) eisa controllers,
* no on board cache and no RAID option.
* BIOS must be enabled on the first board and must be disabled for all other
* boards.
* Support is provided for any number of DPT PM2122 eisa boards.
* All boards should be configured at the same IRQ level.
* Multiple IRQ configurations are supported too.
* Boards can be located in any eisa slot (1-15) and are named EATA0,
* EATA1,... in increasing eisa slot number. ISA boards are detected
* after the eisa slot probes.
*
* The IRQ for EISA boards should be _level_ triggered (not _edge_ triggered).
* This is a requirement in order to support multiple boards on the same IRQ.
*
* Other eisa configuration parameters are:
*
* COMMAND QUEUING : ENABLED
* COMMAND TIMEOUT : ENABLED
* CACHE : DISABLED
*
* In order to support multiple ISA boards in a reliable way,
* the driver sets host->wish_block = TRUE for all ISA boards.
*/
#if defined(MODULE)
#include <linux/module.h>
#include <linux/version.h>
#endif
#include <linux/string.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/ioport.h>
#include <asm/io.h>
#include <asm/system.h>
#include <linux/proc_fs.h>
#include <linux/blk.h>
#include "scsi.h"
#include "hosts.h"
#include "sd.h"
#include <asm/dma.h>
#include <asm/irq.h>
#include "linux/in.h"
#include "eata.h"
#include<linux/stat.h>
struct proc_dir_entry proc_scsi_eata2x = {
PROC_SCSI_EATA2X, 6, "eata2x",
S_IFDIR | S_IRUGO | S_IXUGO, 2
};
/* Subversion values */
#define ISA 0
#define ESA 1
#undef FORCE_CONFIG
#undef DEBUG_DETECT
#undef DEBUG_INTERRUPT
#undef DEBUG_STATISTICS
#undef DEBUG_RESET
#define MAX_TARGET 8
#define MAX_IRQ 16
#define MAX_BOARDS 18
#define MAX_MAILBOXES 64
#define MAX_SGLIST 64
#define MAX_CMD_PER_LUN 2
#define FALSE 0
#define TRUE 1
#define FREE 0
#define IN_USE 1
#define LOCKED 2
#define IN_RESET 3
#define IGNORE 4
#define NO_IRQ 0xff
#define NO_DMA 0xff
#define MAXLOOP 200000
#define REG_CMD 7
#define REG_STATUS 7
#define REG_AUX_STATUS 8
#define REG_DATA 0
#define REG_DATA2 1
#define REG_SEE 6
#define REG_LOW 2
#define REG_LM 3
#define REG_MID 4
#define REG_MSB 5
#define REGION_SIZE 9
#define EISA_RANGE 0xf000
#define BSY_ASSERTED 0x80
#define DRQ_ASSERTED 0x08
#define ABSY_ASSERTED 0x01
#define IRQ_ASSERTED 0x02
#define READ_CONFIG_PIO 0xf0
#define SET_CONFIG_PIO 0xf1
#define SEND_CP_PIO 0xf2
#define RECEIVE_SP_PIO 0xf3
#define TRUNCATE_XFR_PIO 0xf4
#define RESET_PIO 0xf9
#define READ_CONFIG_DMA 0xfd
#define SET_CONFIG_DMA 0xfe
#define SEND_CP_DMA 0xff
#define ASOK 0x00
#define ASST 0x01
#define ARRAY_SIZE(arr) (sizeof (arr) / sizeof (arr)[0])
/* "EATA", in Big Endian format */
#define EATA_SIGNATURE 0x41544145
/* Number of valid bytes in the board config structure for EATA 2.0x */
#define EATA_2_0A_SIZE 28
#define EATA_2_0B_SIZE 30
/* Board info structure */
struct eata_info {
ulong data_len; /* Number of valid bytes after this field */
ulong sign; /* ASCII "EATA" signature */
unchar :4, /* unused low nibble */
version:4; /* EATA version, should be 0x1 */
unchar ocsena:1, /* Overlap Command Support Enabled */
tarsup:1, /* Target Mode Supported */
:2,
dmasup:1, /* DMA Supported */
drqvld:1, /* DRQ Index (DRQX) is valid */
ata:1, /* This is an ATA device */
haaval:1; /* Host Adapter Address Valid */
ushort cp_pad_len; /* Number of pad bytes after cp_len */
unchar host_addr[3]; /* Host Adapter SCSI ID for channels 2, 1, 0 */
unchar reserved;
ulong cp_len; /* Number of valid bytes in cp */
ulong sp_len; /* Number of valid bytes in sp */
ushort queue_size; /* Max number of cp that can be queued */
ushort unused;
ushort scatt_size; /* Max number of entries in scatter/gather table */
unchar irq:4, /* Interrupt Request assigned to this controller */
irq_tr:1, /* 0 for edge triggered, 1 for level triggered */
second:1, /* 1 if this is a secondary (not primary) controller */
drqx:2; /* DRQ Index (0=DMA0, 1=DMA7, 2=DMA6, 3=DMA5) */
unchar sync; /* 1 if scsi target id 7...0 is running sync scsi */
/* Structure extension defined in EATA 2.0B */
unchar isaena:1, /* ISA i/o addressing is disabled/enabled */
forcaddr:1, /* Port address has been forced */
:6;
unchar max_id:5, /* Max number of SCSI target IDs */
max_chan:3; /* Max SCSI channel number on this board */
ushort ipad[249];
};
/* Board config structure */
struct eata_config {
ushort len; /* Number of bytes following this field */
unchar edis:1, /* Disable EATA interface after config command */
ocena:1, /* Overlapped Commands Enabled */
mdpena:1, /* Transfer all Modified Data Pointer Messages */
tarena:1, /* Target Mode Enabled for this controller */
:4;
unchar cpad[511];
};
/* Returned status packet structure */
struct mssp {
unchar adapter_status:7, /* State related to current command */
eoc:1; /* End Of Command (1 = command completed) */
unchar target_status; /* SCSI status received after data transfer */
unchar unused[2];
ulong inv_res_len; /* Number of bytes not transferred */
Scsi_Cmnd *SCpnt; /* Address set in cp */
char mess[12];
};
/* MailBox SCSI Command Packet */
struct mscp {
unchar sreset:1, /* SCSI Bus Reset Signal should be asserted */
init:1, /* Re-initialize controller and self test */
reqsen:1, /* Transfer Request Sense Data to addr using DMA */
sg:1, /* Use Scatter/Gather */
:1,
interp:1, /* The controller interprets cp, not the target */
dout:1, /* Direction of Transfer is Out (Host to Target) */
din:1; /* Direction of Transfer is In (Target to Host) */
unchar sense_len; /* Request Sense Length */
unchar unused[4];
unchar phsunit:1, /* Send to Target Physical Unit (bypass RAID) */
notused:7;
unchar target; /* SCSI Target ID */
unchar lun:3, /* LUN */
:2,
luntar:1, /* This cp is for Target (not LUN) */
dispri:1, /* Disconnect Privilege granted */
one:1; /* 1 */
unchar mess[3]; /* Massage to/from Target */
unchar cdb[12]; /* Command Descriptor Block */
ulong data_len; /* If sg=0 Data Length, if sg=1 sglist length */
Scsi_Cmnd *SCpnt; /* Address to be returned is sp */
ulong data_address; /* If sg=0 Data Address, if sg=1 sglist address */
ulong sp_addr; /* Address where sp is DMA'ed when cp completes */
ulong sense_addr; /* Address where Sense Data is DMA'ed on error */
struct sg_list {
unsigned int address; /* Segment Address */
unsigned int num_bytes; /* Segment Length */
} sglist[MAX_SGLIST];
unsigned int index; /* cp index */
};
struct hostdata {
struct mscp cp[MAX_MAILBOXES]; /* Mailboxes for this board */
unsigned int cp_stat[MAX_MAILBOXES]; /* FREE, IN_USE, LOCKED, IN_RESET */
unsigned int last_cp_used; /* Index of last mailbox used */
unsigned int iocount; /* Total i/o done for this board */
unsigned int multicount; /* Total ... in second ihdlr loop */
int board_number; /* Number of this board */
char board_name[16]; /* Name of this board */
char board_id[256]; /* data from INQUIRY on this board */
int in_reset; /* True if board is doing a reset */
int target_time_out[MAX_TARGET]; /* N. of timeout errors on target */
int target_reset[MAX_TARGET]; /* If TRUE redo operation on target */
unsigned char subversion; /* Bus type, either ISA or ESA */
unsigned char protocol_rev; /* EATA 2.0 rev., 'A' or 'B' or 'C' */
struct mssp sp[MAX_MAILBOXES]; /* Returned status for this board */
};
static struct Scsi_Host * sh[MAX_BOARDS + 1];
static const char* driver_name = "EATA";
static unsigned int irqlist[MAX_IRQ], calls[MAX_IRQ];
#define HD(board) ((struct hostdata *) &sh[board]->hostdata)
#define BN(board) (HD(board)->board_name)
static void eata2x_interrupt_handler(int, struct pt_regs *);
static int do_trace = FALSE;
static inline unchar wait_on_busy(ushort iobase) {
unsigned int loop = MAXLOOP;
while (inb(iobase + REG_AUX_STATUS) & ABSY_ASSERTED)
if (--loop == 0) return TRUE;
return FALSE;
}
static inline unchar do_dma (ushort iobase, unsigned int addr, unchar cmd) {
if (wait_on_busy(iobase)) return TRUE;
if (addr) {
outb((char) addr, iobase + REG_LOW);
outb((char) (addr >> 8), iobase + REG_LM);
outb((char) (addr >> 16), iobase + REG_MID);
outb((char) (addr >> 24), iobase + REG_MSB);
}
outb(cmd, iobase + REG_CMD);
return FALSE;
}
static inline unchar read_pio (ushort iobase, ushort *start, ushort *end) {
unsigned int loop = MAXLOOP;
ushort *p;
for (p = start; p <= end; p++) {
while (!(inb(iobase + REG_STATUS) & DRQ_ASSERTED))
if (--loop == 0) return TRUE;
loop = MAXLOOP;
*p = inw(iobase);
}
return FALSE;
}
static inline int port_detect(ushort *port_base, unsigned int j,
Scsi_Host_Template * tpnt) {
unsigned char irq, dma_channel, subversion;
unsigned char protocol_rev;
struct eata_info info;
const char *board_status;
/* Allowed DMA channels for ISA (0 indicates reserved) */
unsigned char dma_channel_table[4] = { 5, 6, 7, 0 };
char name[16];
sprintf(name, "%s%d", driver_name, j);
if(check_region(*port_base, REGION_SIZE)) {
printk("%s: address 0x%03x in use, skipping probe.\n",
name, *port_base);
return FALSE;
}
if (do_dma(*port_base, 0, READ_CONFIG_PIO)) return FALSE;
/* Read the info structure */
if (read_pio(*port_base, (ushort *)&info, (ushort *)&info.ipad[0]))
return FALSE;
/* Check the controller "EATA" signature */
if (info.sign != EATA_SIGNATURE) return FALSE;
if (ntohl(info.data_len) < EATA_2_0A_SIZE) {
printk("%s: config structure size (%ld bytes) too short, detaching.\n",
name, ntohl(info.data_len));
return FALSE;
}
else if (ntohl(info.data_len) == EATA_2_0A_SIZE)
protocol_rev = 'A';
else if (ntohl(info.data_len) == EATA_2_0B_SIZE)
protocol_rev = 'B';
else
protocol_rev = 'C';
if (protocol_rev != 'A' && info.max_chan > 0)
printk("%s: warning, only scsi channel 0 is supported.\n", name);
irq = info.irq;
if (*port_base & EISA_RANGE) {
if (!info.haaval || info.ata || info.drqvld) {
printk("%s: unusable EISA board found (%d%d%d), detaching.\n",
name, info.haaval, info.ata, info.drqvld);
return FALSE;
}
subversion = ESA;
dma_channel = NO_DMA;
}
else {
if (!info.haaval || info.ata || !info.drqvld) {
printk("%s: unusable ISA board found (%d%d%d), detaching.\n",
name, info.haaval, info.ata, info.drqvld);
return FALSE;
}
subversion = ISA;
dma_channel = dma_channel_table[3 - info.drqx];
}
if (!info.dmasup)
printk("%s: warning, DMA protocol support not asserted.\n", name);
if (subversion == ESA && !info.irq_tr)
printk("%s: warning, LEVEL triggering is suggested for IRQ %u.\n",
name, irq);
if (info.second)
board_status = "Sec.";
else
board_status = "Prim.";
/* Board detected, allocate its IRQ if not already done */
if ((irq >= MAX_IRQ) || ((irqlist[irq] == NO_IRQ) && request_irq
(irq, eata2x_interrupt_handler, SA_INTERRUPT, driver_name))) {
printk("%s: unable to allocate IRQ %u, detaching.\n", name, irq);
return FALSE;
}
if (subversion == ISA && request_dma(dma_channel, driver_name)) {
printk("%s: unable to allocate DMA channel %u, detaching.\n",
name, dma_channel);
free_irq(irq);
return FALSE;
}
#if defined (FORCE_CONFIG)
{
struct eata_config config;
/* Set board configuration */
memset((char *)&config, 0, sizeof(struct eata_config));
config.len = (ushort) htons((ushort)510);
config.ocena = TRUE;
if (do_dma(*port_base, (unsigned int)&config, SET_CONFIG_DMA)) {
printk("%s: busy timeout sending configuration, detaching.\n", name);
return FALSE;
}
}
#endif
sh[j] = scsi_register(tpnt, sizeof(struct hostdata));
if (sh[j] == NULL) {
printk("%s: unable to register host, detaching.\n", name);
if (irqlist[irq] == NO_IRQ) free_irq(irq);
if (subversion == ISA) free_dma(dma_channel);
return FALSE;
}
sh[j]->io_port = *port_base;
sh[j]->n_io_port = REGION_SIZE;
sh[j]->dma_channel = dma_channel;
sh[j]->irq = irq;
sh[j]->sg_tablesize = (ushort) ntohs(info.scatt_size);
sh[j]->this_id = (ushort) info.host_addr[3];
sh[j]->can_queue = (ushort) ntohs(info.queue_size);
sh[j]->cmd_per_lun = MAX_CMD_PER_LUN;
/* Register the I/O space that we use */
request_region(sh[j]->io_port, REGION_SIZE, driver_name);
memset(HD(j), 0, sizeof(struct hostdata));
HD(j)->subversion = subversion;
HD(j)->protocol_rev = protocol_rev;
HD(j)->board_number = j;
irqlist[irq] = j;
if (HD(j)->subversion == ESA)
sh[j]->unchecked_isa_dma = FALSE;
else {
sh[j]->wish_block = TRUE;
sh[j]->unchecked_isa_dma = TRUE;
disable_dma(dma_channel);
clear_dma_ff(dma_channel);
set_dma_mode(dma_channel, DMA_MODE_CASCADE);
enable_dma(dma_channel);
}
strcpy(BN(j), name);
printk("%s: 2.0%c, %s, ID %d, PORT 0x%03x, IRQ %u, DMA %u, SG %d, "\
"Mbox %d, CmdLun %d.\n", BN(j), HD(j)->protocol_rev, board_status,
sh[j]->this_id, sh[j]->io_port, sh[j]->irq, sh[j]->dma_channel,
sh[j]->sg_tablesize, sh[j]->can_queue, sh[j]->cmd_per_lun);
/* DPT PM2012 does not allow to detect sg_tablesize correctly */
if (sh[j]->sg_tablesize > MAX_SGLIST || sh[j]->sg_tablesize < 2) {
printk("%s: detect, forcing to use %d SG lists.\n", BN(j), MAX_SGLIST);
sh[j]->sg_tablesize = MAX_SGLIST;
}
/* DPT PM2012 does not allow to detect can_queue correctly */
if (sh[j]->can_queue > MAX_MAILBOXES || sh[j]->can_queue < 2) {
printk("%s: detect, forcing to use %d Mbox.\n", BN(j), MAX_MAILBOXES);
sh[j]->can_queue = MAX_MAILBOXES;
}
#if defined (DEBUG_DETECT)
if (protocol_rev != 'A')
printk("%s: EATA 2.0%c, isaena %u, forcaddr %u, max_id %u,"\
" max_chan %u.\n", name, protocol_rev, info.isaena,
info.forcaddr, info.max_id, info.max_chan);
printk("%s: Version 0x%x, SYNC 0x%x, infol %ld, cpl %ld spl %ld.\n",
name, info.version, info.sync, ntohl(info.data_len),
ntohl(info.cp_len), ntohl(info.sp_len));
#endif
return TRUE;
}
int eata2x_detect (Scsi_Host_Template * tpnt) {
unsigned int j = 0, k, flags;
ushort io_port[] = {
0x1c88, 0x2c88, 0x3c88, 0x4c88, 0x5c88, 0x6c88, 0x7c88, 0x8c88,
0x9c88, 0xac88, 0xbc88, 0xcc88, 0xdc88, 0xec88, 0xfc88,
0x1f0, 0x170, 0x330, 0x230, 0x0
};
ushort *port_base = io_port;
tpnt->proc_dir = &proc_scsi_eata2x;
save_flags(flags);
cli();
for (k = 0; k < MAX_IRQ; k++) {
irqlist[k] = NO_IRQ;
calls[k] = 0;
}
for (k = 0; k < MAX_BOARDS + 1; k++) sh[k] = NULL;
while (*port_base) {
if (j < MAX_BOARDS && port_detect(port_base, j, tpnt)) j++;
port_base++;
}
if (j > 0)
printk("EATA/DMA 2.0x: Copyright (C) 1994, 1995 Dario Ballabio.\n");
restore_flags(flags);
return j;
}
static inline void build_sg_list(struct mscp *cpp, Scsi_Cmnd *SCpnt) {
unsigned int k;
struct scatterlist * sgpnt;
sgpnt = (struct scatterlist *) SCpnt->request_buffer;
for (k = 0; k < SCpnt->use_sg; k++) {
cpp->sglist[k].address = htonl((unsigned int) sgpnt[k].address);
cpp->sglist[k].num_bytes = htonl((unsigned int) sgpnt[k].length);
}
cpp->data_address = htonl((unsigned int) cpp->sglist);
cpp->data_len = htonl((SCpnt->use_sg * sizeof(struct sg_list)));
}
int eata2x_queuecommand (Scsi_Cmnd *SCpnt, void (*done)(Scsi_Cmnd *)) {
unsigned int i, j, k, flags;
struct mscp *cpp;
struct mssp *spp;
static const unsigned char data_out_cmds[] = {
0x0a, 0x2a, 0x15, 0x55, 0x04, 0x07, 0x0b, 0x10, 0x16, 0x18, 0x1d,
0x24, 0x2b, 0x2e, 0x30, 0x31, 0x32, 0x38, 0x39, 0x3a, 0x3b, 0x3d,
0x3f, 0x40, 0x41, 0x4c, 0xaa, 0xae, 0xb0, 0xb1, 0xb2, 0xb6, 0xea
};
save_flags(flags);
cli();
/* j is the board number */
j = ((struct hostdata *) SCpnt->host->hostdata)->board_number;
if (!done) panic("%s: qcomm, pid %ld, null done.\n", BN(j), SCpnt->pid);
/* i is the mailbox number, look for the first free mailbox
starting from last_cp_used */
i = HD(j)->last_cp_used + 1;
for (k = 0; k < sh[j]->can_queue; k++, i++) {
if (i >= sh[j]->can_queue) i = 0;
if (HD(j)->cp_stat[i] == FREE) {
HD(j)->last_cp_used = i;
break;
}
}
if (k == sh[j]->can_queue) {
printk("%s: qcomm, no free mailbox, resetting.\n", BN(j));
if (HD(j)->in_reset)
printk("%s: qcomm, already in reset.\n", BN(j));
else if (eata2x_reset(SCpnt) == SCSI_RESET_SUCCESS)
panic("%s: qcomm, SCSI_RESET_SUCCESS.\n", BN(j));
SCpnt->result = DID_BUS_BUSY << 16;
SCpnt->host_scribble = NULL;
printk("%s: qcomm, pid %ld, DID_BUS_BUSY, done.\n", BN(j), SCpnt->pid);
restore_flags(flags);
done(SCpnt);
return 0;
}
/* Set pointer to control packet structure */
cpp = &HD(j)->cp[i];
memset(cpp, 0, sizeof(struct mscp));
/* Set pointer to status packet structure */
spp = &HD(j)->sp[i];
memset(spp, 0, sizeof(struct mssp));
/* The EATA protocol uses Big Endian format, while Intel is Little Endian */
cpp->sp_addr = htonl((unsigned int) spp);
SCpnt->scsi_done = done;
cpp->index = i;
SCpnt->host_scribble = (unsigned char *) &cpp->index;
if (do_trace) printk("%s: qcomm, mbox %d, target %d, pid %ld.\n",
BN(j), i, SCpnt->target, SCpnt->pid);
for (k = 0; k < ARRAY_SIZE(data_out_cmds); k++)
if (SCpnt->cmnd[0] == data_out_cmds[k]) {
cpp->dout = TRUE;
break;
}
cpp->din = !cpp->dout;
cpp->reqsen = TRUE;
cpp->dispri = TRUE;
cpp->one = TRUE;
cpp->target = SCpnt->target;
cpp->lun = SCpnt->lun;
cpp->SCpnt = SCpnt;
cpp->sense_addr = htonl((unsigned int) SCpnt->sense_buffer);
cpp->sense_len = sizeof SCpnt->sense_buffer;
if (SCpnt->use_sg) {
cpp->sg = TRUE;
build_sg_list(cpp, SCpnt);
}
else {
cpp->data_address = htonl((unsigned int) SCpnt->request_buffer);
cpp->data_len = htonl(SCpnt->request_bufflen);
}
memcpy(cpp->cdb, SCpnt->cmnd, SCpnt->cmd_len);
/* Send control packet to the board */
if (do_dma(sh[j]->io_port, (unsigned int) cpp, SEND_CP_DMA)) {
SCpnt->result = DID_ERROR << 16;
SCpnt->host_scribble = NULL;
printk("%s: qcomm, target %d, pid %ld, adapter busy, DID_ERROR, done.\n",
BN(j), SCpnt->target, SCpnt->pid);
restore_flags(flags);
done(SCpnt);
return 0;
}
HD(j)->cp_stat[i] = IN_USE;
restore_flags(flags);
return 0;
}
int eata2x_abort (Scsi_Cmnd *SCarg) {
unsigned int i, j, flags;
save_flags(flags);
cli();
j = ((struct hostdata *) SCarg->host->hostdata)->board_number;
if (SCarg->host_scribble == NULL) {
printk("%s: abort, target %d, pid %ld inactive.\n",
BN(j), SCarg->target, SCarg->pid);
restore_flags(flags);
return SCSI_ABORT_NOT_RUNNING;
}
i = *(unsigned int *)SCarg->host_scribble;
printk("%s: abort, mbox %d, target %d, pid %ld.\n",
BN(j), i, SCarg->target, SCarg->pid);
if (i >= sh[j]->can_queue)
panic("%s: abort, invalid SCarg->host_scribble.\n", BN(j));
if (wait_on_busy(sh[j]->io_port)) {
printk("%s: abort, timeout error.\n", BN(j));
restore_flags(flags);
return SCSI_ABORT_ERROR;
}
if (HD(j)->cp_stat[i] == FREE) {
printk("%s: abort, mbox %d is free.\n", BN(j), i);
restore_flags(flags);
return SCSI_ABORT_NOT_RUNNING;
}
if (HD(j)->cp_stat[i] == IN_USE) {
printk("%s: abort, mbox %d is in use.\n", BN(j), i);
if (SCarg != HD(j)->cp[i].SCpnt)
panic("%s: abort, mbox %d, SCarg %p, cp SCpnt %p.\n",
BN(j), i, SCarg, HD(j)->cp[i].SCpnt);
restore_flags(flags);
return SCSI_ABORT_SNOOZE;
}
if (HD(j)->cp_stat[i] == IN_RESET) {
printk("%s: abort, mbox %d is in reset.\n", BN(j), i);
restore_flags(flags);
return SCSI_ABORT_ERROR;
}
if (HD(j)->cp_stat[i] == LOCKED) {
printk("%s: abort, mbox %d is locked.\n", BN(j), i);
restore_flags(flags);
return SCSI_ABORT_NOT_RUNNING;
}
restore_flags(flags);
panic("%s: abort, mbox %d, invalid cp_stat.\n", BN(j), i);
}
int eata2x_reset (Scsi_Cmnd *SCarg) {
unsigned int i, j, flags, time, k, limit = 0;
int arg_done = FALSE;
Scsi_Cmnd *SCpnt;
save_flags(flags);
cli();
j = ((struct hostdata *) SCarg->host->hostdata)->board_number;
printk("%s: reset, enter, target %d, pid %ld.\n",
BN(j), SCarg->target, SCarg->pid);
if (SCarg->host_scribble == NULL)
printk("%s: reset, pid %ld inactive.\n", BN(j), SCarg->pid);
if (HD(j)->in_reset) {
printk("%s: reset, exit, already in reset.\n", BN(j));
restore_flags(flags);
return SCSI_RESET_ERROR;
}
if (wait_on_busy(sh[j]->io_port)) {
printk("%s: reset, exit, timeout error.\n", BN(j));
restore_flags(flags);
return SCSI_RESET_ERROR;
}
for (k = 0; k < MAX_TARGET; k++) HD(j)->target_reset[k] = TRUE;
for (k = 0; k < MAX_TARGET; k++) HD(j)->target_time_out[k] = 0;
for (i = 0; i < sh[j]->can_queue; i++) {
if (HD(j)->cp_stat[i] == FREE) continue;
if (HD(j)->cp_stat[i] == LOCKED) {
HD(j)->cp_stat[i] = FREE;
printk("%s: reset, locked mbox %d forced free.\n", BN(j), i);
continue;
}
SCpnt = HD(j)->cp[i].SCpnt;
HD(j)->cp_stat[i] = IN_RESET;
printk("%s: reset, mbox %d in reset, pid %ld.\n",
BN(j), i, SCpnt->pid);
if (SCpnt == NULL)
panic("%s: reset, mbox %d, SCpnt == NULL.\n", BN(j), i);
if (SCpnt->host_scribble == NULL)
panic("%s: reset, mbox %d, garbled SCpnt.\n", BN(j), i);
if (*(unsigned int *)SCpnt->host_scribble != i)
panic("%s: reset, mbox %d, index mismatch.\n", BN(j), i);
if (SCpnt->scsi_done == NULL)
panic("%s: reset, mbox %d, SCpnt->scsi_done == NULL.\n", BN(j), i);
if (SCpnt == SCarg) arg_done = TRUE;
}
if (do_dma(sh[j]->io_port, 0, RESET_PIO)) {
printk("%s: reset, cannot reset, timeout error.\n", BN(j));
restore_flags(flags);
return SCSI_RESET_ERROR;
}
printk("%s: reset, board reset done, enabling interrupts.\n", BN(j));
#if defined (DEBUG_RESET)
do_trace = TRUE;
#endif
HD(j)->in_reset = TRUE;
sti();
time = jiffies;
while (jiffies < (time + 100) && limit++ < 100000000);
cli();
printk("%s: reset, interrupts disabled, loops %d.\n", BN(j), limit);
for (i = 0; i < sh[j]->can_queue; i++) {
/* Skip mailboxes already set free by interrupt */
if (HD(j)->cp_stat[i] != IN_RESET) continue;
SCpnt = HD(j)->cp[i].SCpnt;
SCpnt->result = DID_RESET << 16;
SCpnt->host_scribble = NULL;
/* This mailbox is still waiting for its interrupt */
HD(j)->cp_stat[i] = LOCKED;
printk("%s, reset, mbox %d locked, DID_RESET, pid %ld done.\n",
BN(j), i, SCpnt->pid);
restore_flags(flags);
SCpnt->scsi_done(SCpnt);
cli();
}
HD(j)->in_reset = FALSE;
do_trace = FALSE;
restore_flags(flags);
if (arg_done) {
printk("%s: reset, exit, success.\n", BN(j));
return SCSI_RESET_SUCCESS;
}
else {
printk("%s: reset, exit, wakeup.\n", BN(j));
return SCSI_RESET_PUNT;
}
}
static void eata2x_interrupt_handler(int irq, struct pt_regs * regs) {
Scsi_Cmnd *SCpnt;
unsigned int i, j, k, flags, status, tstatus, loops, total_loops = 0;
struct mssp *spp;
struct mscp *cpp;
save_flags(flags);
cli();
if (irqlist[irq] == NO_IRQ) {
printk("%s, ihdlr, irq %d, unexpected interrupt.\n", driver_name, irq);
restore_flags(flags);
return;
}
if (do_trace) printk("%s: ihdlr, enter, irq %d, calls %d.\n",
driver_name, irq, calls[irq]);
/* Service all the boards configured on this irq */
for (j = 0; sh[j] != NULL; j++) {
if (sh[j]->irq != irq) continue;
loops = 0;
/* Loop until all interrupts for a board are serviced */
while (inb(sh[j]->io_port + REG_AUX_STATUS) & IRQ_ASSERTED) {
total_loops++;
loops++;
if (do_trace) printk("%s: ihdlr, start service, count %d.\n",
BN(j), HD(j)->iocount);
/* Read the status register to clear the interrupt indication */
inb(sh[j]->io_port + REG_STATUS);
/* Service all mailboxes of this board */
for (i = 0; i < sh[j]->can_queue; i++) {
spp = &HD(j)->sp[i];
/* Check if this mailbox has completed the operation */
if (spp->eoc == FALSE) continue;
spp->eoc = FALSE;
if (HD(j)->cp_stat[i] == IGNORE) {
HD(j)->cp_stat[i] = FREE;
continue;
}
else if (HD(j)->cp_stat[i] == LOCKED) {
HD(j)->cp_stat[i] = FREE;
printk("%s: ihdlr, mbox %d unlocked, count %d.\n",
BN(j), i, HD(j)->iocount);
continue;
}
else if (HD(j)->cp_stat[i] == FREE) {
printk("%s: ihdlr, mbox %d is free, count %d.\n",
BN(j), i, HD(j)->iocount);
continue;
}
else if (HD(j)->cp_stat[i] == IN_RESET)
printk("%s: ihdlr, mbox %d is in reset.\n", BN(j), i);
else if (HD(j)->cp_stat[i] != IN_USE)
panic("%s: ihdlr, mbox %d, invalid cp_stat.\n", BN(j), i);
HD(j)->cp_stat[i] = FREE;
cpp = &HD(j)->cp[i];
SCpnt = spp->SCpnt;
if (SCpnt == NULL)
panic("%s: ihdlr, mbox %d, SCpnt == NULL.\n", BN(j), i);
if (SCpnt != cpp->SCpnt)
panic("%s: ihdlr, mbox %d, sp SCpnt %p, cp SCpnt %p.\n",
BN(j), i, SCpnt, cpp->SCpnt);
if (SCpnt->host_scribble == NULL)
panic("%s: ihdlr, mbox %d, pid %ld, SCpnt %p garbled.\n",
BN(j), i, SCpnt->pid, SCpnt);
if (*(unsigned int *)SCpnt->host_scribble != i)
panic("%s: ihdlr, mbox %d, pid %ld, index mismatch %d,"\
" irq %d.\n", BN(j), i, SCpnt->pid,
*(unsigned int *)SCpnt->host_scribble, irq);
tstatus = status_byte(spp->target_status);
switch (spp->adapter_status) {
case ASOK: /* status OK */
/* Forces a reset if a disk drive keeps returning BUSY */
if (tstatus == BUSY && SCpnt->device->type != TYPE_TAPE)
status = DID_ERROR << 16;
/* If there was a bus reset, redo operation on each target */
else if (tstatus != GOOD
&& SCpnt->device->type == TYPE_DISK
&& HD(j)->target_reset[SCpnt->target])
status = DID_BUS_BUSY << 16;
/* Works around a flaw in scsi.c */
else if (tstatus == CHECK_CONDITION
&& SCpnt->device->type == TYPE_DISK
&& (SCpnt->sense_buffer[2] & 0xf) == RECOVERED_ERROR)
status = DID_BUS_BUSY << 16;
else
status = DID_OK << 16;
if (tstatus == GOOD)
HD(j)->target_reset[SCpnt->target] = FALSE;
if (spp->target_status && SCpnt->device->type == TYPE_DISK)
printk("%s: ihdlr, target %d:%d, pid %ld, target_status "\
"0x%x, sense key 0x%x.\n", BN(j),
SCpnt->target, SCpnt->lun, SCpnt->pid,
spp->target_status, SCpnt->sense_buffer[2]);
HD(j)->target_time_out[SCpnt->target] = 0;
break;
case ASST: /* Selection Time Out */
case 0x02: /* Command Time Out */
if (HD(j)->target_time_out[SCpnt->target] > 1)
status = DID_ERROR << 16;
else {
status = DID_TIME_OUT << 16;
HD(j)->target_time_out[SCpnt->target]++;
}
break;
case 0x03: /* SCSI Bus Reset Received */
case 0x04: /* Initial Controller Power-up */
if (SCpnt->device->type != TYPE_TAPE)
status = DID_BUS_BUSY << 16;
else
status = DID_ERROR << 16;
for (k = 0; k < MAX_TARGET; k++)
HD(j)->target_reset[k] = TRUE;
break;
case 0x07: /* Bus Parity Error */
case 0x0c: /* Controller Ram Parity */
case 0x05: /* Unexpected Bus Phase */
case 0x06: /* Unexpected Bus Free */
case 0x08: /* SCSI Hung */
case 0x09: /* Unexpected Message Reject */
case 0x0a: /* SCSI Bus Reset Stuck */
case 0x0b: /* Auto Request-Sense Failed */
default:
status = DID_ERROR << 16;
break;
}
SCpnt->result = status | spp->target_status;
HD(j)->iocount++;
if (loops > 1) HD(j)->multicount++;
#if defined (DEBUG_INTERRUPT)
if (SCpnt->result || do_trace)
#else
if ((spp->adapter_status != ASOK && HD(j)->iocount > 1000) ||
(spp->adapter_status != ASOK &&
spp->adapter_status != ASST && HD(j)->iocount <= 1000) ||
do_trace)
#endif
printk("%s: ihdlr, mbox %d, err 0x%x:%x,"\
" target %d:%d, pid %ld, count %d.\n",
BN(j), i, spp->adapter_status, spp->target_status,
SCpnt->target, SCpnt->lun, SCpnt->pid, HD(j)->iocount);
/* Set the command state to inactive */
SCpnt->host_scribble = NULL;
restore_flags(flags);
SCpnt->scsi_done(SCpnt);
cli();
} /* Mailbox loop */
} /* Multiple command loop */
} /* Boards loop */
calls[irq]++;
if (total_loops == 0)
printk("%s: ihdlr, irq %d, no command completed, calls %d.\n",
driver_name, irq, calls[irq]);
if (do_trace) printk("%s: ihdlr, exit, irq %d, calls %d.\n",
driver_name, irq, calls[irq]);
#if defined (DEBUG_STATISTICS)
if ((calls[irq] % 100000) == 10000)
for (j = 0; sh[j] != NULL; j++)
printk("%s: ihdlr, calls %d, count %d, multi %d.\n", BN(j),
calls[(sh[j]->irq)], HD(j)->iocount, HD(j)->multicount);
#endif
restore_flags(flags);
return;
}
#if defined(MODULE)
Scsi_Host_Template driver_template = EATA;
#include "scsi_module.c"
#endif
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