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sym_glue.c
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/*
* Device driver for the SYMBIOS/LSILOGIC 53C8XX and 53C1010 family
* of PCI-SCSI IO processors.
*
* Copyright (C) 1999-2001 Gerard Roudier <groudier@free.fr>
* Copyright (c) 2003-2005 Matthew Wilcox <matthew@wil.cx>
*
* This driver is derived from the Linux sym53c8xx driver.
* Copyright (C) 1998-2000 Gerard Roudier
*
* The sym53c8xx driver is derived from the ncr53c8xx driver that had been
* a port of the FreeBSD ncr driver to Linux-1.2.13.
*
* The original ncr driver has been written for 386bsd and FreeBSD by
* Wolfgang Stanglmeier <wolf@cologne.de>
* Stefan Esser <se@mi.Uni-Koeln.de>
* Copyright (C) 1994 Wolfgang Stanglmeier
*
* Other major contributions:
*
* NVRAM detection and reading.
* Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk>
*
*-----------------------------------------------------------------------------
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/ctype.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/spinlock.h>
#include <scsi/scsi.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_transport.h>
#include "sym_glue.h"
#include "sym_nvram.h"
#define NAME53C "sym53c"
#define NAME53C8XX "sym53c8xx"
struct sym_driver_setup sym_driver_setup = SYM_LINUX_DRIVER_SETUP;
unsigned int sym_debug_flags = 0;
static char *excl_string;
static char *safe_string;
module_param_named(cmd_per_lun, sym_driver_setup.max_tag, ushort, 0);
module_param_named(burst, sym_driver_setup.burst_order, byte, 0);
module_param_named(led, sym_driver_setup.scsi_led, byte, 0);
module_param_named(diff, sym_driver_setup.scsi_diff, byte, 0);
module_param_named(irqm, sym_driver_setup.irq_mode, byte, 0);
module_param_named(buschk, sym_driver_setup.scsi_bus_check, byte, 0);
module_param_named(hostid, sym_driver_setup.host_id, byte, 0);
module_param_named(verb, sym_driver_setup.verbose, byte, 0);
module_param_named(debug, sym_debug_flags, uint, 0);
module_param_named(settle, sym_driver_setup.settle_delay, byte, 0);
module_param_named(nvram, sym_driver_setup.use_nvram, byte, 0);
module_param_named(excl, excl_string, charp, 0);
module_param_named(safe, safe_string, charp, 0);
MODULE_PARM_DESC(cmd_per_lun, "The maximum number of tags to use by default");
MODULE_PARM_DESC(burst, "Maximum burst. 0 to disable, 255 to read from registers");
MODULE_PARM_DESC(led, "Set to 1 to enable LED support");
MODULE_PARM_DESC(diff, "0 for no differential mode, 1 for BIOS, 2 for always, 3 for not GPIO3");
MODULE_PARM_DESC(irqm, "0 for open drain, 1 to leave alone, 2 for totem pole");
MODULE_PARM_DESC(buschk, "0 to not check, 1 for detach on error, 2 for warn on error");
MODULE_PARM_DESC(hostid, "The SCSI ID to use for the host adapters");
MODULE_PARM_DESC(verb, "0 for minimal verbosity, 1 for normal, 2 for excessive");
MODULE_PARM_DESC(debug, "Set bits to enable debugging");
MODULE_PARM_DESC(settle, "Settle delay in seconds. Default 3");
MODULE_PARM_DESC(nvram, "Option currently not used");
MODULE_PARM_DESC(excl, "List ioport addresses here to prevent controllers from being attached");
MODULE_PARM_DESC(safe, "Set other settings to a \"safe mode\"");
MODULE_LICENSE("GPL");
MODULE_VERSION(SYM_VERSION);
MODULE_AUTHOR("Matthew Wilcox <matthew@wil.cx>");
MODULE_DESCRIPTION("NCR, Symbios and LSI 8xx and 1010 PCI SCSI adapters");
static void sym2_setup_params(void)
{
char *p = excl_string;
int xi = 0;
while (p && (xi < 8)) {
char *next_p;
int val = (int) simple_strtoul(p, &next_p, 0);
sym_driver_setup.excludes[xi++] = val;
p = next_p;
}
if (safe_string) {
if (*safe_string == 'y') {
sym_driver_setup.max_tag = 0;
sym_driver_setup.burst_order = 0;
sym_driver_setup.scsi_led = 0;
sym_driver_setup.scsi_diff = 1;
sym_driver_setup.irq_mode = 0;
sym_driver_setup.scsi_bus_check = 2;
sym_driver_setup.host_id = 7;
sym_driver_setup.verbose = 2;
sym_driver_setup.settle_delay = 10;
sym_driver_setup.use_nvram = 1;
} else if (*safe_string != 'n') {
printk(KERN_WARNING NAME53C8XX "Ignoring parameter %s"
" passed to safe option", safe_string);
}
}
}
static struct scsi_transport_template *sym2_transport_template = NULL;
/*
* Driver private area in the SCSI command structure.
*/
struct sym_ucmd { /* Override the SCSI pointer structure */
struct completion *eh_done; /* SCSI error handling */
};
#define SYM_UCMD_PTR(cmd) ((struct sym_ucmd *)(&(cmd)->SCp))
#define SYM_SOFTC_PTR(cmd) sym_get_hcb(cmd->device->host)
/*
* Complete a pending CAM CCB.
*/
void sym_xpt_done(struct sym_hcb *np, struct scsi_cmnd *cmd)
{
struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd);
BUILD_BUG_ON(sizeof(struct scsi_pointer) < sizeof(struct sym_ucmd));
if (ucmd->eh_done)
complete(ucmd->eh_done);
scsi_dma_unmap(cmd);
cmd->scsi_done(cmd);
}
/*
* Tell the SCSI layer about a BUS RESET.
*/
void sym_xpt_async_bus_reset(struct sym_hcb *np)
{
printf_notice("%s: SCSI BUS has been reset.\n", sym_name(np));
np->s.settle_time = jiffies + sym_driver_setup.settle_delay * HZ;
np->s.settle_time_valid = 1;
if (sym_verbose >= 2)
printf_info("%s: command processing suspended for %d seconds\n",
sym_name(np), sym_driver_setup.settle_delay);
}
/*
* Choose the more appropriate CAM status if
* the IO encountered an extended error.
*/
static int sym_xerr_cam_status(int cam_status, int x_status)
{
if (x_status) {
if (x_status & XE_PARITY_ERR)
cam_status = DID_PARITY;
else if (x_status &(XE_EXTRA_DATA|XE_SODL_UNRUN|XE_SWIDE_OVRUN))
cam_status = DID_ERROR;
else if (x_status & XE_BAD_PHASE)
cam_status = DID_ERROR;
else
cam_status = DID_ERROR;
}
return cam_status;
}
/*
* Build CAM result for a failed or auto-sensed IO.
*/
void sym_set_cam_result_error(struct sym_hcb *np, struct sym_ccb *cp, int resid)
{
struct scsi_cmnd *cmd = cp->cmd;
u_int cam_status, scsi_status, drv_status;
drv_status = 0;
cam_status = DID_OK;
scsi_status = cp->ssss_status;
if (cp->host_flags & HF_SENSE) {
scsi_status = cp->sv_scsi_status;
resid = cp->sv_resid;
if (sym_verbose && cp->sv_xerr_status)
sym_print_xerr(cmd, cp->sv_xerr_status);
if (cp->host_status == HS_COMPLETE &&
cp->ssss_status == S_GOOD &&
cp->xerr_status == 0) {
cam_status = sym_xerr_cam_status(DID_OK,
cp->sv_xerr_status);
drv_status = DRIVER_SENSE;
/*
* Bounce back the sense data to user.
*/
memset(&cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
memcpy(cmd->sense_buffer, cp->sns_bbuf,
min(sizeof(cmd->sense_buffer),
(size_t)SYM_SNS_BBUF_LEN));
#if 0
/*
* If the device reports a UNIT ATTENTION condition
* due to a RESET condition, we should consider all
* disconnect CCBs for this unit as aborted.
*/
if (1) {
u_char *p;
p = (u_char *) cmd->sense_data;
if (p[0]==0x70 && p[2]==0x6 && p[12]==0x29)
sym_clear_tasks(np, DID_ABORT,
cp->target,cp->lun, -1);
}
#endif
} else {
/*
* Error return from our internal request sense. This
* is bad: we must clear the contingent allegiance
* condition otherwise the device will always return
* BUSY. Use a big stick.
*/
sym_reset_scsi_target(np, cmd->device->id);
cam_status = DID_ERROR;
}
} else if (cp->host_status == HS_COMPLETE) /* Bad SCSI status */
cam_status = DID_OK;
else if (cp->host_status == HS_SEL_TIMEOUT) /* Selection timeout */
cam_status = DID_NO_CONNECT;
else if (cp->host_status == HS_UNEXPECTED) /* Unexpected BUS FREE*/
cam_status = DID_ERROR;
else { /* Extended error */
if (sym_verbose) {
sym_print_addr(cmd, "COMMAND FAILED (%x %x %x).\n",
cp->host_status, cp->ssss_status,
cp->xerr_status);
}
/*
* Set the most appropriate value for CAM status.
*/
cam_status = sym_xerr_cam_status(DID_ERROR, cp->xerr_status);
}
scsi_set_resid(cmd, resid);
cmd->result = (drv_status << 24) + (cam_status << 16) + scsi_status;
}
static int sym_scatter(struct sym_hcb *np, struct sym_ccb *cp, struct scsi_cmnd *cmd)
{
int segment;
int use_sg;
cp->data_len = 0;
use_sg = scsi_dma_map(cmd);
if (use_sg > 0) {
struct scatterlist *sg;
struct sym_tcb *tp = &np->target[cp->target];
struct sym_tblmove *data;
if (use_sg > SYM_CONF_MAX_SG) {
scsi_dma_unmap(cmd);
return -1;
}
data = &cp->phys.data[SYM_CONF_MAX_SG - use_sg];
scsi_for_each_sg(cmd, sg, use_sg, segment) {
dma_addr_t baddr = sg_dma_address(sg);
unsigned int len = sg_dma_len(sg);
if ((len & 1) && (tp->head.wval & EWS)) {
len++;
cp->odd_byte_adjustment++;
}
sym_build_sge(np, &data[segment], baddr, len);
cp->data_len += len;
}
} else {
segment = -2;
}
return segment;
}
/*
* Queue a SCSI command.
*/
static int sym_queue_command(struct sym_hcb *np, struct scsi_cmnd *cmd)
{
struct scsi_device *sdev = cmd->device;
struct sym_tcb *tp;
struct sym_lcb *lp;
struct sym_ccb *cp;
int order;
/*
* Retrieve the target descriptor.
*/
tp = &np->target[sdev->id];
/*
* Select tagged/untagged.
*/
lp = sym_lp(tp, sdev->lun);
order = (lp && lp->s.reqtags) ? M_SIMPLE_TAG : 0;
/*
* Queue the SCSI IO.
*/
cp = sym_get_ccb(np, cmd, order);
if (!cp)
return 1; /* Means resource shortage */
sym_queue_scsiio(np, cmd, cp);
return 0;
}
/*
* Setup buffers and pointers that address the CDB.
*/
static inline int sym_setup_cdb(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
{
memcpy(cp->cdb_buf, cmd->cmnd, cmd->cmd_len);
cp->phys.cmd.addr = CCB_BA(cp, cdb_buf[0]);
cp->phys.cmd.size = cpu_to_scr(cmd->cmd_len);
return 0;
}
/*
* Setup pointers that address the data and start the I/O.
*/
int sym_setup_data_and_start(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
{
u32 lastp, goalp;
int dir;
/*
* Build the CDB.
*/
if (sym_setup_cdb(np, cmd, cp))
goto out_abort;
/*
* No direction means no data.
*/
dir = cmd->sc_data_direction;
if (dir != DMA_NONE) {
cp->segments = sym_scatter(np, cp, cmd);
if (cp->segments < 0) {
sym_set_cam_status(cmd, DID_ERROR);
goto out_abort;
}
/*
* No segments means no data.
*/
if (!cp->segments)
dir = DMA_NONE;
} else {
cp->data_len = 0;
cp->segments = 0;
}
/*
* Set the data pointer.
*/
switch (dir) {
case DMA_BIDIRECTIONAL:
scmd_printk(KERN_INFO, cmd, "got DMA_BIDIRECTIONAL command");
sym_set_cam_status(cmd, DID_ERROR);
goto out_abort;
case DMA_TO_DEVICE:
goalp = SCRIPTA_BA(np, data_out2) + 8;
lastp = goalp - 8 - (cp->segments * (2*4));
break;
case DMA_FROM_DEVICE:
cp->host_flags |= HF_DATA_IN;
goalp = SCRIPTA_BA(np, data_in2) + 8;
lastp = goalp - 8 - (cp->segments * (2*4));
break;
case DMA_NONE:
default:
lastp = goalp = SCRIPTB_BA(np, no_data);
break;
}
/*
* Set all pointers values needed by SCRIPTS.
*/
cp->phys.head.lastp = cpu_to_scr(lastp);
cp->phys.head.savep = cpu_to_scr(lastp);
cp->startp = cp->phys.head.savep;
cp->goalp = cpu_to_scr(goalp);
/*
* When `#ifed 1', the code below makes the driver
* panic on the first attempt to write to a SCSI device.
* It is the first test we want to do after a driver
* change that does not seem obviously safe. :)
*/
#if 0
switch (cp->cdb_buf[0]) {
case 0x0A: case 0x2A: case 0xAA:
panic("XXXXXXXXXXXXX WRITE NOT YET ALLOWED XXXXXXXXXXXXXX\n");
break;
default:
break;
}
#endif
/*
* activate this job.
*/
sym_put_start_queue(np, cp);
return 0;
out_abort:
sym_free_ccb(np, cp);
sym_xpt_done(np, cmd);
return 0;
}
/*
* timer daemon.
*
* Misused to keep the driver running when
* interrupts are not configured correctly.
*/
static void sym_timer(struct sym_hcb *np)
{
unsigned long thistime = jiffies;
/*
* Restart the timer.
*/
np->s.timer.expires = thistime + SYM_CONF_TIMER_INTERVAL;
add_timer(&np->s.timer);
/*
* If we are resetting the ncr, wait for settle_time before
* clearing it. Then command processing will be resumed.
*/
if (np->s.settle_time_valid) {
if (time_before_eq(np->s.settle_time, thistime)) {
if (sym_verbose >= 2 )
printk("%s: command processing resumed\n",
sym_name(np));
np->s.settle_time_valid = 0;
}
return;
}
/*
* Nothing to do for now, but that may come.
*/
if (np->s.lasttime + 4*HZ < thistime) {
np->s.lasttime = thistime;
}
#ifdef SYM_CONF_PCIQ_MAY_MISS_COMPLETIONS
/*
* Some way-broken PCI bridges may lead to
* completions being lost when the clearing
* of the INTFLY flag by the CPU occurs
* concurrently with the chip raising this flag.
* If this ever happen, lost completions will
* be reaped here.
*/
sym_wakeup_done(np);
#endif
}
/*
* PCI BUS error handler.
*/
void sym_log_bus_error(struct Scsi_Host *shost)
{
struct sym_data *sym_data = shost_priv(shost);
struct pci_dev *pdev = sym_data->pdev;
unsigned short pci_sts;
pci_read_config_word(pdev, PCI_STATUS, &pci_sts);
if (pci_sts & 0xf900) {
pci_write_config_word(pdev, PCI_STATUS, pci_sts);
shost_printk(KERN_WARNING, shost,
"PCI bus error: status = 0x%04x\n", pci_sts & 0xf900);
}
}
/*
* queuecommand method. Entered with the host adapter lock held and
* interrupts disabled.
*/
static int sym53c8xx_queue_command(struct scsi_cmnd *cmd,
void (*done)(struct scsi_cmnd *))
{
struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
struct sym_ucmd *ucp = SYM_UCMD_PTR(cmd);
int sts = 0;
cmd->scsi_done = done;
memset(ucp, 0, sizeof(*ucp));
/*
* Shorten our settle_time if needed for
* this command not to time out.
*/
if (np->s.settle_time_valid && cmd->timeout_per_command) {
unsigned long tlimit = jiffies + cmd->timeout_per_command;
tlimit -= SYM_CONF_TIMER_INTERVAL*2;
if (time_after(np->s.settle_time, tlimit)) {
np->s.settle_time = tlimit;
}
}
if (np->s.settle_time_valid)
return SCSI_MLQUEUE_HOST_BUSY;
sts = sym_queue_command(np, cmd);
if (sts)
return SCSI_MLQUEUE_HOST_BUSY;
return 0;
}
/*
* Linux entry point of the interrupt handler.
*/
static irqreturn_t sym53c8xx_intr(int irq, void *dev_id)
{
struct Scsi_Host *shost = dev_id;
struct sym_data *sym_data = shost_priv(shost);
irqreturn_t result;
/* Avoid spinloop trying to handle interrupts on frozen device */
if (pci_channel_offline(sym_data->pdev))
return IRQ_NONE;
if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("[");
spin_lock(shost->host_lock);
result = sym_interrupt(shost);
spin_unlock(shost->host_lock);
if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("]\n");
return result;
}
/*
* Linux entry point of the timer handler
*/
static void sym53c8xx_timer(unsigned long npref)
{
struct sym_hcb *np = (struct sym_hcb *)npref;
unsigned long flags;
spin_lock_irqsave(np->s.host->host_lock, flags);
sym_timer(np);
spin_unlock_irqrestore(np->s.host->host_lock, flags);
}
/*
* What the eh thread wants us to perform.
*/
#define SYM_EH_ABORT 0
#define SYM_EH_DEVICE_RESET 1
#define SYM_EH_BUS_RESET 2
#define SYM_EH_HOST_RESET 3
/*
* Generic method for our eh processing.
* The 'op' argument tells what we have to do.
*/
static int sym_eh_handler(int op, char *opname, struct scsi_cmnd *cmd)
{
struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd);
struct Scsi_Host *shost = cmd->device->host;
struct sym_data *sym_data = shost_priv(shost);
struct pci_dev *pdev = sym_data->pdev;
struct sym_hcb *np = sym_data->ncb;
SYM_QUEHEAD *qp;
int cmd_queued = 0;
int sts = -1;
struct completion eh_done;
scmd_printk(KERN_WARNING, cmd, "%s operation started\n", opname);
/* We may be in an error condition because the PCI bus
* went down. In this case, we need to wait until the
* PCI bus is reset, the card is reset, and only then
* proceed with the scsi error recovery. There's no
* point in hurrying; take a leisurely wait.
*/
#define WAIT_FOR_PCI_RECOVERY 35
if (pci_channel_offline(pdev)) {
int finished_reset = 0;
init_completion(&eh_done);
spin_lock_irq(shost->host_lock);
/* Make sure we didn't race */
if (pci_channel_offline(pdev)) {
BUG_ON(sym_data->io_reset);
sym_data->io_reset = &eh_done;
} else {
finished_reset = 1;
}
spin_unlock_irq(shost->host_lock);
if (!finished_reset)
finished_reset = wait_for_completion_timeout
(sym_data->io_reset,
WAIT_FOR_PCI_RECOVERY*HZ);
spin_lock_irq(shost->host_lock);
sym_data->io_reset = NULL;
spin_unlock_irq(shost->host_lock);
if (!finished_reset)
return SCSI_FAILED;
}
spin_lock_irq(shost->host_lock);
/* This one is queued in some place -> to wait for completion */
FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
struct sym_ccb *cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
if (cp->cmd == cmd) {
cmd_queued = 1;
break;
}
}
/* Try to proceed the operation we have been asked for */
sts = -1;
switch(op) {
case SYM_EH_ABORT:
sts = sym_abort_scsiio(np, cmd, 1);
break;
case SYM_EH_DEVICE_RESET:
sts = sym_reset_scsi_target(np, cmd->device->id);
break;
case SYM_EH_BUS_RESET:
sym_reset_scsi_bus(np, 1);
sts = 0;
break;
case SYM_EH_HOST_RESET:
sym_reset_scsi_bus(np, 0);
sym_start_up(shost, 1);
sts = 0;
break;
default:
break;
}
/* On error, restore everything and cross fingers :) */
if (sts)
cmd_queued = 0;
if (cmd_queued) {
init_completion(&eh_done);
ucmd->eh_done = &eh_done;
spin_unlock_irq(shost->host_lock);
if (!wait_for_completion_timeout(&eh_done, 5*HZ)) {
ucmd->eh_done = NULL;
sts = -2;
}
} else {
spin_unlock_irq(shost->host_lock);
}
dev_warn(&cmd->device->sdev_gendev, "%s operation %s.\n", opname,
sts==0 ? "complete" :sts==-2 ? "timed-out" : "failed");
return sts ? SCSI_FAILED : SCSI_SUCCESS;
}
/*
* Error handlers called from the eh thread (one thread per HBA).
*/
static int sym53c8xx_eh_abort_handler(struct scsi_cmnd *cmd)
{
return sym_eh_handler(SYM_EH_ABORT, "ABORT", cmd);
}
static int sym53c8xx_eh_device_reset_handler(struct scsi_cmnd *cmd)
{
return sym_eh_handler(SYM_EH_DEVICE_RESET, "DEVICE RESET", cmd);
}
static int sym53c8xx_eh_bus_reset_handler(struct scsi_cmnd *cmd)
{
return sym_eh_handler(SYM_EH_BUS_RESET, "BUS RESET", cmd);
}
static int sym53c8xx_eh_host_reset_handler(struct scsi_cmnd *cmd)
{
return sym_eh_handler(SYM_EH_HOST_RESET, "HOST RESET", cmd);
}
/*
* Tune device queuing depth, according to various limits.
*/
static void sym_tune_dev_queuing(struct sym_tcb *tp, int lun, u_short reqtags)
{
struct sym_lcb *lp = sym_lp(tp, lun);
u_short oldtags;
if (!lp)
return;
oldtags = lp->s.reqtags;
if (reqtags > lp->s.scdev_depth)
reqtags = lp->s.scdev_depth;
lp->s.reqtags = reqtags;
if (reqtags != oldtags) {
dev_info(&tp->starget->dev,
"tagged command queuing %s, command queue depth %d.\n",
lp->s.reqtags ? "enabled" : "disabled", reqtags);
}
}
static int sym53c8xx_slave_alloc(struct scsi_device *sdev)
{
struct sym_hcb *np = sym_get_hcb(sdev->host);
struct sym_tcb *tp = &np->target[sdev->id];
struct sym_lcb *lp;
if (sdev->id >= SYM_CONF_MAX_TARGET || sdev->lun >= SYM_CONF_MAX_LUN)
return -ENXIO;
tp->starget = sdev->sdev_target;
/*
* Fail the device init if the device is flagged NOSCAN at BOOT in
* the NVRAM. This may speed up boot and maintain coherency with
* BIOS device numbering. Clearing the flag allows the user to
* rescan skipped devices later. We also return an error for
* devices not flagged for SCAN LUNS in the NVRAM since some single
* lun devices behave badly when asked for a non zero LUN.
*/
if (tp->usrflags & SYM_SCAN_BOOT_DISABLED) {
tp->usrflags &= ~SYM_SCAN_BOOT_DISABLED;
starget_printk(KERN_INFO, tp->starget,
"Scan at boot disabled in NVRAM\n");
return -ENXIO;
}
if (tp->usrflags & SYM_SCAN_LUNS_DISABLED) {
if (sdev->lun != 0)
return -ENXIO;
starget_printk(KERN_INFO, tp->starget,
"Multiple LUNs disabled in NVRAM\n");
}
lp = sym_alloc_lcb(np, sdev->id, sdev->lun);
if (!lp)
return -ENOMEM;
spi_min_period(tp->starget) = tp->usr_period;
spi_max_width(tp->starget) = tp->usr_width;
return 0;
}
/*
* Linux entry point for device queue sizing.
*/
static int sym53c8xx_slave_configure(struct scsi_device *sdev)
{
struct sym_hcb *np = sym_get_hcb(sdev->host);
struct sym_tcb *tp = &np->target[sdev->id];
struct sym_lcb *lp = sym_lp(tp, sdev->lun);
int reqtags, depth_to_use;
/*
* Get user flags.
*/
lp->curr_flags = lp->user_flags;
/*
* Select queue depth from driver setup.
* Donnot use more than configured by user.
* Use at least 2.
* Donnot use more than our maximum.
*/
reqtags = sym_driver_setup.max_tag;
if (reqtags > tp->usrtags)
reqtags = tp->usrtags;
if (!sdev->tagged_supported)
reqtags = 0;
if (reqtags > SYM_CONF_MAX_TAG)
reqtags = SYM_CONF_MAX_TAG;
depth_to_use = reqtags ? reqtags : 2;
scsi_adjust_queue_depth(sdev,
sdev->tagged_supported ? MSG_SIMPLE_TAG : 0,
depth_to_use);
lp->s.scdev_depth = depth_to_use;
sym_tune_dev_queuing(tp, sdev->lun, reqtags);
if (!spi_initial_dv(sdev->sdev_target))
spi_dv_device(sdev);
return 0;
}
static void sym53c8xx_slave_destroy(struct scsi_device *sdev)
{
struct sym_hcb *np = sym_get_hcb(sdev->host);
struct sym_lcb *lp = sym_lp(&np->target[sdev->id], sdev->lun);
if (lp->itlq_tbl)
sym_mfree_dma(lp->itlq_tbl, SYM_CONF_MAX_TASK * 4, "ITLQ_TBL");
kfree(lp->cb_tags);
sym_mfree_dma(lp, sizeof(*lp), "LCB");
}
/*
* Linux entry point for info() function
*/
static const char *sym53c8xx_info (struct Scsi_Host *host)
{
return SYM_DRIVER_NAME;
}
#ifdef SYM_LINUX_PROC_INFO_SUPPORT
/*
* Proc file system stuff
*
* A read operation returns adapter information.
* A write operation is a control command.
* The string is parsed in the driver code and the command is passed
* to the sym_usercmd() function.
*/
#ifdef SYM_LINUX_USER_COMMAND_SUPPORT
struct sym_usrcmd {
u_long target;
u_long lun;
u_long data;
u_long cmd;
};
#define UC_SETSYNC 10
#define UC_SETTAGS 11
#define UC_SETDEBUG 12
#define UC_SETWIDE 14
#define UC_SETFLAG 15
#define UC_SETVERBOSE 17
#define UC_RESETDEV 18
#define UC_CLEARDEV 19
static void sym_exec_user_command (struct sym_hcb *np, struct sym_usrcmd *uc)
{
struct sym_tcb *tp;
int t, l;
switch (uc->cmd) {
case 0: return;
#ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
case UC_SETDEBUG:
sym_debug_flags = uc->data;
break;
#endif
case UC_SETVERBOSE:
np->verbose = uc->data;
break;
default:
/*
* We assume that other commands apply to targets.
* This should always be the case and avoid the below
* 4 lines to be repeated 6 times.
*/
for (t = 0; t < SYM_CONF_MAX_TARGET; t++) {
if (!((uc->target >> t) & 1))
continue;
tp = &np->target[t];
switch (uc->cmd) {
case UC_SETSYNC:
if (!uc->data || uc->data >= 255) {
tp->tgoal.iu = tp->tgoal.dt =
tp->tgoal.qas = 0;
tp->tgoal.offset = 0;
} else if (uc->data <= 9 && np->minsync_dt) {
if (uc->data < np->minsync_dt)
uc->data = np->minsync_dt;
tp->tgoal.iu = tp->tgoal.dt =
tp->tgoal.qas = 1;
tp->tgoal.width = 1;
tp->tgoal.period = uc->data;
tp->tgoal.offset = np->maxoffs_dt;
} else {
if (uc->data < np->minsync)
uc->data = np->minsync;
tp->tgoal.iu = tp->tgoal.dt =
tp->tgoal.qas = 0;
tp->tgoal.period = uc->data;
tp->tgoal.offset = np->maxoffs;
}
tp->tgoal.check_nego = 1;
break;
case UC_SETWIDE:
tp->tgoal.width = uc->data ? 1 : 0;
tp->tgoal.check_nego = 1;
break;
case UC_SETTAGS:
for (l = 0; l < SYM_CONF_MAX_LUN; l++)
sym_tune_dev_queuing(tp, l, uc->data);
break;
case UC_RESETDEV:
tp->to_reset = 1;
np->istat_sem = SEM;
OUTB(np, nc_istat, SIGP|SEM);
break;
case UC_CLEARDEV:
for (l = 0; l < SYM_CONF_MAX_LUN; l++) {
struct sym_lcb *lp = sym_lp(tp, l);
if (lp) lp->to_clear = 1;
}
np->istat_sem = SEM;
OUTB(np, nc_istat, SIGP|SEM);
break;
case UC_SETFLAG:
tp->usrflags = uc->data;
break;
}
}
break;
}
}
static int skip_spaces(char *ptr, int len)
{
int cnt, c;
for (cnt = len; cnt > 0 && (c = *ptr++) && isspace(c); cnt--);
return (len - cnt);
}
static int get_int_arg(char *ptr, int len, u_long *pv)
{
char *end;
*pv = simple_strtoul(ptr, &end, 10);
return (end - ptr);
}
static int is_keyword(char *ptr, int len, char *verb)
{
int verb_len = strlen(verb);
if (len >= verb_len && !memcmp(verb, ptr, verb_len))
return verb_len;
else
return 0;
}
#define SKIP_SPACES(ptr, len) \
if ((arg_len = skip_spaces(ptr, len)) < 1) \
return -EINVAL; \
ptr += arg_len; len -= arg_len;
#define GET_INT_ARG(ptr, len, v) \
if (!(arg_len = get_int_arg(ptr, len, &(v)))) \
return -EINVAL; \
ptr += arg_len; len -= arg_len;
/*
* Parse a control command
*/
static int sym_user_command(struct Scsi_Host *shost, char *buffer, int length)
{
struct sym_hcb *np = sym_get_hcb(shost);
char *ptr = buffer;
int len = length;
struct sym_usrcmd cmd, *uc = &cmd;
int arg_len;
u_long target;