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1da177e4c3
linux/drivers/scsi/qla2xxx/qla_os.c
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2 
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

4457 lines
110 KiB
C
Raw Blame History

/*
* QLOGIC LINUX SOFTWARE
*
* QLogic ISP2x00 device driver for Linux 2.6.x
* Copyright (C) 2003-2004 QLogic Corporation
* (www.qlogic.com)
*
* 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, 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.
*
*/
#include "qla_def.h"
#include <linux/moduleparam.h>
#include <linux/vmalloc.h>
#include <linux/smp_lock.h>
#include <linux/delay.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsicam.h>
#include <scsi/scsi_transport.h>
#include <scsi/scsi_transport_fc.h>
/*
* Driver version
*/
char qla2x00_version_str[40];
/*
* SRB allocation cache
*/
char srb_cachep_name[16];
kmem_cache_t *srb_cachep;
/*
* Stats for all adpaters.
*/
struct _qla2x00stats qla2x00_stats;
/*
* Ioctl related information.
*/
int num_hosts;
int apiHBAInstance;
/*
* Module parameter information and variables
*/
int ql2xmaxqdepth;
module_param(ql2xmaxqdepth, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(ql2xmaxqdepth,
"Maximum queue depth to report for target devices.");
int ql2xlogintimeout = 20;
module_param(ql2xlogintimeout, int, S_IRUGO|S_IRUSR);
MODULE_PARM_DESC(ql2xlogintimeout,
"Login timeout value in seconds.");
int qlport_down_retry;
module_param(qlport_down_retry, int, S_IRUGO|S_IRUSR);
MODULE_PARM_DESC(qlport_down_retry,
"Maximum number of command retries to a port that returns"
"a PORT-DOWN status.");
int ql2xretrycount = 20;
module_param(ql2xretrycount, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(ql2xretrycount,
"Maximum number of mid-layer retries allowed for a command. "
"Default value is 20, ");
int displayConfig;
module_param(displayConfig, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(displayConfig,
"If 1 then display the configuration used in /etc/modprobe.conf.");
int ql2xplogiabsentdevice;
module_param(ql2xplogiabsentdevice, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(ql2xplogiabsentdevice,
"Option to enable PLOGI to devices that are not present after "
"a Fabric scan. This is needed for several broken switches."
"Default is 0 - no PLOGI. 1 - perfom PLOGI.");
int ql2xenablezio = 0;
module_param(ql2xenablezio, int, S_IRUGO|S_IRUSR);
MODULE_PARM_DESC(ql2xenablezio,
"Option to enable ZIO:If 1 then enable it otherwise"
" use the default set in the NVRAM."
" Default is 0 : disabled");
int ql2xintrdelaytimer = 10;
module_param(ql2xintrdelaytimer, int, S_IRUGO|S_IRUSR);
MODULE_PARM_DESC(ql2xintrdelaytimer,
"ZIO: Waiting time for Firmware before it generates an "
"interrupt to the host to notify completion of request.");
int ConfigRequired;
module_param(ConfigRequired, int, S_IRUGO|S_IRUSR);
MODULE_PARM_DESC(ConfigRequired,
"If 1, then only configured devices passed in through the"
"ql2xopts parameter will be presented to the OS");
int Bind = BIND_BY_PORT_NAME;
module_param(Bind, int, S_IRUGO|S_IRUSR);
MODULE_PARM_DESC(Bind,
"Target persistent binding method: "
"0 by Portname (default); 1 by PortID; 2 by Nodename. ");
int ql2xsuspendcount = SUSPEND_COUNT;
module_param(ql2xsuspendcount, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(ql2xsuspendcount,
"Number of 6-second suspend iterations to perform while a "
"target returns a <NOT READY> status. Default is 10 "
"iterations.");
int ql2xdoinitscan = 1;
module_param(ql2xdoinitscan, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(ql2xdoinitscan,
"Signal mid-layer to perform scan after driver load: 0 -- no "
"signal sent to mid-layer.");
int ql2xloginretrycount = 0;
module_param(ql2xloginretrycount, int, S_IRUGO|S_IRUSR);
MODULE_PARM_DESC(ql2xloginretrycount,
"Specify an alternate value for the NVRAM login retry count.");
/*
* Proc structures and functions
*/
struct info_str {
char *buffer;
int length;
off_t offset;
int pos;
};
static void copy_mem_info(struct info_str *, char *, int);
static int copy_info(struct info_str *, char *, ...);
static void qla2x00_free_device(scsi_qla_host_t *);
static void qla2x00_config_dma_addressing(scsi_qla_host_t *ha);
/*
* SCSI host template entry points
*/
static int qla2xxx_slave_configure(struct scsi_device * device);
static int qla2x00_queuecommand(struct scsi_cmnd *cmd,
void (*fn)(struct scsi_cmnd *));
static int qla2xxx_eh_abort(struct scsi_cmnd *);
static int qla2xxx_eh_device_reset(struct scsi_cmnd *);
static int qla2xxx_eh_bus_reset(struct scsi_cmnd *);
static int qla2xxx_eh_host_reset(struct scsi_cmnd *);
static int qla2x00_loop_reset(scsi_qla_host_t *ha);
static int qla2x00_device_reset(scsi_qla_host_t *, fc_port_t *);
static int qla2x00_proc_info(struct Scsi_Host *, char *, char **,
off_t, int, int);
static struct scsi_host_template qla2x00_driver_template = {
.module = THIS_MODULE,
.name = "qla2xxx",
.proc_name = "qla2xxx",
.proc_info = qla2x00_proc_info,
.queuecommand = qla2x00_queuecommand,
.eh_abort_handler = qla2xxx_eh_abort,
.eh_device_reset_handler = qla2xxx_eh_device_reset,
.eh_bus_reset_handler = qla2xxx_eh_bus_reset,
.eh_host_reset_handler = qla2xxx_eh_host_reset,
.slave_configure = qla2xxx_slave_configure,
.this_id = -1,
.cmd_per_lun = 3,
.use_clustering = ENABLE_CLUSTERING,
.sg_tablesize = SG_ALL,
/*
* The RISC allows for each command to transfer (2^32-1) bytes of data,
* which equates to 0x800000 sectors.
*/
.max_sectors = 0xFFFF,
};
static struct scsi_transport_template *qla2xxx_transport_template = NULL;
static void qla2x00_display_fc_names(scsi_qla_host_t *);
/* TODO Convert to inlines
*
* Timer routines
*/
#define WATCH_INTERVAL 1 /* number of seconds */
static void qla2x00_timer(scsi_qla_host_t *);
static __inline__ void qla2x00_start_timer(scsi_qla_host_t *,
void *, unsigned long);
static __inline__ void qla2x00_restart_timer(scsi_qla_host_t *, unsigned long);
static __inline__ void qla2x00_stop_timer(scsi_qla_host_t *);
static inline void
qla2x00_start_timer(scsi_qla_host_t *ha, void *func, unsigned long interval)
{
init_timer(&ha->timer);
ha->timer.expires = jiffies + interval * HZ;
ha->timer.data = (unsigned long)ha;
ha->timer.function = (void (*)(unsigned long))func;
add_timer(&ha->timer);
ha->timer_active = 1;
}
static inline void
qla2x00_restart_timer(scsi_qla_host_t *ha, unsigned long interval)
{
mod_timer(&ha->timer, jiffies + interval * HZ);
}
static __inline__ void
qla2x00_stop_timer(scsi_qla_host_t *ha)
{
del_timer_sync(&ha->timer);
ha->timer_active = 0;
}
void qla2x00_cmd_timeout(srb_t *);
static __inline__ void qla2x00_callback(scsi_qla_host_t *, struct scsi_cmnd *);
static __inline__ void sp_put(struct scsi_qla_host * ha, srb_t *sp);
static __inline__ void sp_get(struct scsi_qla_host * ha, srb_t *sp);
static __inline__ void
qla2x00_delete_from_done_queue(scsi_qla_host_t *, srb_t *);
/*
* qla2x00_callback
* Returns the completed SCSI command to LINUX.
*
* Input:
* ha -- Host adapter structure
* cmd -- SCSI mid-level command structure.
* Returns:
* None
* Note:From failover point of view we always get the sp
* from vis_ha pool in queuecommand.So when we put it
* back to the pool it has to be the vis_ha.
* So rely on struct scsi_cmnd to get the vis_ha and not on sp.
*/
static inline void
qla2x00_callback(scsi_qla_host_t *ha, struct scsi_cmnd *cmd)
{
srb_t *sp = (srb_t *) CMD_SP(cmd);
scsi_qla_host_t *vis_ha;
os_lun_t *lq;
int got_sense;
unsigned long cpu_flags = 0;
cmd->host_scribble = (unsigned char *) NULL;
vis_ha = (scsi_qla_host_t *) cmd->device->host->hostdata;
if (sp == NULL) {
qla_printk(KERN_INFO, ha,
"%s(): **** CMD derives a NULL SP\n",
__func__);
DEBUG2(BUG();)
return;
}
/*
* If command status is not DID_BUS_BUSY then go ahead and freed sp.
*/
/*
* Cancel command timeout
*/
qla2x00_delete_timer_from_cmd(sp);
/*
* Put SP back in the free queue
*/
sp->cmd = NULL;
CMD_SP(cmd) = NULL;
lq = sp->lun_queue;
got_sense = (sp->flags & SRB_GOT_SENSE)? 1: 0;
add_to_free_queue(vis_ha, sp);
if (host_byte(cmd->result) == DID_OK) {
/* device ok */
ha->total_bytes += cmd->bufflen;
if (!got_sense) {
/* If lun was suspended then clear retry count */
spin_lock_irqsave(&lq->q_lock, cpu_flags);
if (!test_bit(LUN_EXEC_DELAYED, &lq->q_flag))
lq->q_state = LUN_STATE_READY;
spin_unlock_irqrestore(&lq->q_lock, cpu_flags);
}
} else if (host_byte(cmd->result) == DID_ERROR) {
/* device error */
ha->total_dev_errs++;
}
/* Call the mid-level driver interrupt handler */
(*(cmd)->scsi_done)(cmd);
}
/**************************************************************************
* sp_put
*
* Description:
* Decrement reference count and call the callback if we're the last
* owner of the specified sp. Will get the host_lock before calling
* the callback.
*
* Input:
* ha - pointer to the scsi_qla_host_t where the callback is to occur.
* sp - pointer to srb_t structure to use.
*
* Returns:
*
**************************************************************************/
static inline void
sp_put(struct scsi_qla_host * ha, srb_t *sp)
{
if (atomic_read(&sp->ref_count) == 0) {
qla_printk(KERN_INFO, ha,
"%s(): **** SP->ref_count not zero\n",
__func__);
DEBUG2(BUG();)
return;
}
if (!atomic_dec_and_test(&sp->ref_count)) {
return;
}
qla2x00_callback(ha, sp->cmd);
}
/**************************************************************************
* sp_get
*
* Description:
* Increment reference count of the specified sp.
*
* Input:
* sp - pointer to srb_t structure to use.
*
* Returns:
*
**************************************************************************/
static inline void
sp_get(struct scsi_qla_host * ha, srb_t *sp)
{
atomic_inc(&sp->ref_count);
if (atomic_read(&sp->ref_count) > 2) {
qla_printk(KERN_INFO, ha,
"%s(): **** SP->ref_count greater than two\n",
__func__);
DEBUG2(BUG();)
return;
}
}
static inline void
qla2x00_delete_from_done_queue(scsi_qla_host_t *dest_ha, srb_t *sp)
{
/* remove command from done list */
list_del_init(&sp->list);
dest_ha->done_q_cnt--;
sp->state = SRB_NO_QUEUE_STATE;
if (sp->flags & SRB_DMA_VALID) {
sp->flags &= ~SRB_DMA_VALID;
/* Release memory used for this I/O */
if (sp->cmd->use_sg) {
pci_unmap_sg(dest_ha->pdev, sp->cmd->request_buffer,
sp->cmd->use_sg, sp->cmd->sc_data_direction);
} else if (sp->cmd->request_bufflen) {
pci_unmap_page(dest_ha->pdev, sp->dma_handle,
sp->cmd->request_bufflen,
sp->cmd->sc_data_direction);
}
}
}
static int qla2x00_do_dpc(void *data);
static void qla2x00_rst_aen(scsi_qla_host_t *);
static uint8_t qla2x00_mem_alloc(scsi_qla_host_t *);
static void qla2x00_mem_free(scsi_qla_host_t *ha);
static int qla2x00_allocate_sp_pool( scsi_qla_host_t *ha);
static void qla2x00_free_sp_pool(scsi_qla_host_t *ha);
static srb_t *qla2x00_get_new_sp(scsi_qla_host_t *ha);
static ssize_t qla2x00_sysfs_read_fw_dump(struct kobject *, char *, loff_t,
size_t);
static ssize_t qla2x00_sysfs_write_fw_dump(struct kobject *, char *, loff_t,
size_t);
static struct bin_attribute sysfs_fw_dump_attr = {
.attr = {
.name = "fw_dump",
.mode = S_IRUSR | S_IWUSR,
.owner = THIS_MODULE,
},
.size = 0,
.read = qla2x00_sysfs_read_fw_dump,
.write = qla2x00_sysfs_write_fw_dump,
};
static ssize_t qla2x00_sysfs_read_nvram(struct kobject *, char *, loff_t,
size_t);
static ssize_t qla2x00_sysfs_write_nvram(struct kobject *, char *, loff_t,
size_t);
static struct bin_attribute sysfs_nvram_attr = {
.attr = {
.name = "nvram",
.mode = S_IRUSR | S_IWUSR,
.owner = THIS_MODULE,
},
.size = sizeof(nvram_t),
.read = qla2x00_sysfs_read_nvram,
.write = qla2x00_sysfs_write_nvram,
};
/* -------------------------------------------------------------------------- */
/* SysFS attributes. */
static ssize_t qla2x00_sysfs_read_fw_dump(struct kobject *kobj, char *buf,
loff_t off, size_t count)
{
struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
struct device, kobj)));
if (ha->fw_dump_reading == 0)
return 0;
if (off > ha->fw_dump_buffer_len)
return 0;
if (off + count > ha->fw_dump_buffer_len)
count = ha->fw_dump_buffer_len - off;
memcpy(buf, &ha->fw_dump_buffer[off], count);
return (count);
}
static ssize_t qla2x00_sysfs_write_fw_dump(struct kobject *kobj, char *buf,
loff_t off, size_t count)
{
struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
struct device, kobj)));
int reading;
uint32_t dump_size;
if (off != 0)
return (0);
reading = simple_strtol(buf, NULL, 10);
switch (reading) {
case 0:
if (ha->fw_dump_reading == 1) {
qla_printk(KERN_INFO, ha,
"Firmware dump cleared on (%ld).\n",
ha->host_no);
vfree(ha->fw_dump_buffer);
free_pages((unsigned long)ha->fw_dump,
ha->fw_dump_order);
ha->fw_dump_reading = 0;
ha->fw_dump_buffer = NULL;
ha->fw_dump = NULL;
}
break;
case 1:
if (ha->fw_dump != NULL && !ha->fw_dump_reading) {
ha->fw_dump_reading = 1;
dump_size = FW_DUMP_SIZE_1M;
if (ha->fw_memory_size < 0x20000)
dump_size = FW_DUMP_SIZE_128K;
else if (ha->fw_memory_size < 0x80000)
dump_size = FW_DUMP_SIZE_512K;
ha->fw_dump_buffer = (char *)vmalloc(dump_size);
if (ha->fw_dump_buffer == NULL) {
qla_printk(KERN_WARNING, ha,
"Unable to allocate memory for firmware "
"dump buffer (%d).\n", dump_size);
ha->fw_dump_reading = 0;
return (count);
}
qla_printk(KERN_INFO, ha,
"Firmware dump ready for read on (%ld).\n",
ha->host_no);
memset(ha->fw_dump_buffer, 0, dump_size);
if (IS_QLA2100(ha) || IS_QLA2200(ha))
qla2100_ascii_fw_dump(ha);
else
qla2300_ascii_fw_dump(ha);
ha->fw_dump_buffer_len = strlen(ha->fw_dump_buffer);
}
break;
}
return (count);
}
static ssize_t qla2x00_sysfs_read_nvram(struct kobject *kobj, char *buf,
loff_t off, size_t count)
{
struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
struct device, kobj)));
uint16_t *witer;
unsigned long flags;
uint16_t cnt;
if (!capable(CAP_SYS_ADMIN) || off != 0 || count != sizeof(nvram_t))
return 0;
/* Read NVRAM. */
spin_lock_irqsave(&ha->hardware_lock, flags);
qla2x00_lock_nvram_access(ha);
witer = (uint16_t *)buf;
for (cnt = 0; cnt < count / 2; cnt++) {
*witer = cpu_to_le16(qla2x00_get_nvram_word(ha,
cnt+ha->nvram_base));
witer++;
}
qla2x00_unlock_nvram_access(ha);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
return (count);
}
static ssize_t qla2x00_sysfs_write_nvram(struct kobject *kobj, char *buf,
loff_t off, size_t count)
{
struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
struct device, kobj)));
uint8_t *iter;
uint16_t *witer;
unsigned long flags;
uint16_t cnt;
uint8_t chksum;
if (!capable(CAP_SYS_ADMIN) || off != 0 || count != sizeof(nvram_t))
return 0;
/* Checksum NVRAM. */
iter = (uint8_t *)buf;
chksum = 0;
for (cnt = 0; cnt < count - 1; cnt++)
chksum += *iter++;
chksum = ~chksum + 1;
*iter = chksum;
/* Write NVRAM. */
spin_lock_irqsave(&ha->hardware_lock, flags);
qla2x00_lock_nvram_access(ha);
qla2x00_release_nvram_protection(ha);
witer = (uint16_t *)buf;
for (cnt = 0; cnt < count / 2; cnt++) {
qla2x00_write_nvram_word(ha, cnt+ha->nvram_base,
cpu_to_le16(*witer));
witer++;
}
qla2x00_unlock_nvram_access(ha);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
return (count);
}
/* -------------------------------------------------------------------------- */
static char *
qla2x00_get_pci_info_str(struct scsi_qla_host *ha, char *str)
{
static char *pci_bus_modes[] = {
"33", "66", "100", "133",
};
uint16_t pci_bus;
strcpy(str, "PCI");
pci_bus = (ha->pci_attr & (BIT_9 | BIT_10)) >> 9;
if (pci_bus) {
strcat(str, "-X (");
strcat(str, pci_bus_modes[pci_bus]);
} else {
pci_bus = (ha->pci_attr & BIT_8) >> 8;
strcat(str, " (");
strcat(str, pci_bus_modes[pci_bus]);
}
strcat(str, " MHz)");
return (str);
}
char *
qla2x00_get_fw_version_str(struct scsi_qla_host *ha, char *str)
{
char un_str[10];
sprintf(str, "%d.%02d.%02d ", ha->fw_major_version,
ha->fw_minor_version,
ha->fw_subminor_version);
if (ha->fw_attributes & BIT_9) {
strcat(str, "FLX");
return (str);
}
switch (ha->fw_attributes & 0xFF) {
case 0x7:
strcat(str, "EF");
break;
case 0x17:
strcat(str, "TP");
break;
case 0x37:
strcat(str, "IP");
break;
case 0x77:
strcat(str, "VI");
break;
default:
sprintf(un_str, "(%x)", ha->fw_attributes);
strcat(str, un_str);
break;
}
if (ha->fw_attributes & 0x100)
strcat(str, "X");
return (str);
}
/**************************************************************************
* qla2x00_queuecommand
*
* Description:
* Queue a command to the controller.
*
* Input:
* cmd - pointer to Scsi cmd structure
* fn - pointer to Scsi done function
*
* Returns:
* 0 - Always
*
* Note:
* The mid-level driver tries to ensures that queuecommand never gets invoked
* concurrently with itself or the interrupt handler (although the
* interrupt handler may call this routine as part of request-completion
* handling).
**************************************************************************/
static int
qla2x00_queuecommand(struct scsi_cmnd *cmd, void (*fn)(struct scsi_cmnd *))
{
fc_port_t *fcport;
os_lun_t *lq;
os_tgt_t *tq;
scsi_qla_host_t *ha, *ha2;
srb_t *sp;
struct Scsi_Host *host;
unsigned int b, t, l;
unsigned long handle;
int was_empty;
host = cmd->device->host;
ha = (scsi_qla_host_t *) host->hostdata;
was_empty = 1;
cmd->scsi_done = fn;
spin_unlock_irq(ha->host->host_lock);
/*
* Allocate a command packet from the "sp" pool. If we cant get back
* one then let scsi layer come back later.
*/
if ((sp = qla2x00_get_new_sp(ha)) == NULL) {
qla_printk(KERN_WARNING, ha,
"Couldn't allocate memory for sp - retried.\n");
spin_lock_irq(ha->host->host_lock);
return (1);
}
sp->cmd = cmd;
CMD_SP(cmd) = (void *)sp;
sp->flags = 0;
if (CMD_RESID_LEN(cmd) & SRB_IOCTL) {
/* Need to set sp->flags */
sp->flags |= SRB_IOCTL;
CMD_RESID_LEN(cmd) = 0; /* Clear it since no more use. */
}
sp->fo_retry_cnt = 0;
sp->err_id = 0;
/* Generate LU queue on bus, target, LUN */
b = cmd->device->channel;
t = cmd->device->id;
l = cmd->device->lun;
/*
* Start Command Timer. Typically it will be 2 seconds less than what
* is requested by the Host such that we can return the IO before
* aborts are called.
*/
if ((cmd->timeout_per_command / HZ) > QLA_CMD_TIMER_DELTA)
qla2x00_add_timer_to_cmd(sp,
(cmd->timeout_per_command / HZ) - QLA_CMD_TIMER_DELTA);
else
qla2x00_add_timer_to_cmd(sp, cmd->timeout_per_command / HZ);
if (l >= ha->max_luns) {
cmd->result = DID_NO_CONNECT << 16;
sp->err_id = SRB_ERR_PORT;
spin_lock_irq(ha->host->host_lock);
sp_put(ha, sp);
return (0);
}
if ((tq = (os_tgt_t *) TGT_Q(ha, t)) != NULL &&
(lq = (os_lun_t *) LUN_Q(ha, t, l)) != NULL) {
fcport = lq->fclun->fcport;
ha2 = fcport->ha;
} else {
lq = NULL;
fcport = NULL;
ha2 = ha;
}
/* Set an invalid handle until we issue the command to ISP */
/* then we will set the real handle value. */
handle = INVALID_HANDLE;
cmd->host_scribble = (unsigned char *)handle;
/* Bookkeeping information */
sp->r_start = jiffies; /* Time the request was recieved. */
sp->u_start = 0;
/* Setup device queue pointers. */
sp->tgt_queue = tq;
sp->lun_queue = lq;
/*
* NOTE : q is NULL
*
* 1. When device is added from persistent binding but has not been
* discovered yet.The state of loopid == PORT_AVAIL.
* 2. When device is never found on the bus.(loopid == UNUSED)
*
* IF Device Queue is not created, or device is not in a valid state
* and link down error reporting is enabled, reject IO.
*/
if (fcport == NULL) {
DEBUG3(printk("scsi(%ld:%2d:%2d): port unavailable\n",
ha->host_no,t,l));
cmd->result = DID_NO_CONNECT << 16;
sp->err_id = SRB_ERR_PORT;
spin_lock_irq(ha->host->host_lock);
sp_put(ha, sp);
return (0);
}
/* Only modify the allowed count if the target is a *non* tape device */
if ((fcport->flags & FCF_TAPE_PRESENT) == 0) {
sp->flags &= ~SRB_TAPE;
if (cmd->allowed < ql2xretrycount) {
cmd->allowed = ql2xretrycount;
}
} else
sp->flags |= SRB_TAPE;
DEBUG5(printk("scsi(%ld:%2d:%2d): (queuecmd) queue sp = %p, "
"flags=0x%x fo retry=%d, pid=%ld\n",
ha->host_no, t, l, sp, sp->flags, sp->fo_retry_cnt,
cmd->serial_number));
DEBUG5(qla2x00_print_scsi_cmd(cmd));
sp->fclun = lq->fclun;
sp->ha = ha2;
if (cmd->sc_data_direction == DMA_BIDIRECTIONAL &&
cmd->request_bufflen != 0) {
DEBUG2(printk(KERN_WARNING
"scsi(%ld): Incorrect data direction - transfer "
"length=%d, direction=%d, pid=%ld, opcode=%x\n",
ha->host_no, cmd->request_bufflen, cmd->sc_data_direction,
cmd->serial_number, cmd->cmnd[0]));
}
/* Final pre-check :
*
* Either PORT_DOWN_TIMER OR LINK_DOWN_TIMER Expired.
*/
if (atomic_read(&fcport->state) == FCS_DEVICE_DEAD ||
atomic_read(&ha2->loop_state) == LOOP_DEAD) {
/*
* Add the command to the done-queue for later failover
* processing.
*/
cmd->result = DID_NO_CONNECT << 16;
if (atomic_read(&ha2->loop_state) == LOOP_DOWN)
sp->err_id = SRB_ERR_LOOP;
else
sp->err_id = SRB_ERR_PORT;
add_to_done_queue(ha, sp);
qla2x00_done(ha);
spin_lock_irq(ha->host->host_lock);
return (0);
}
if (tq && test_bit(TQF_SUSPENDED, &tq->flags) &&
(sp->flags & SRB_TAPE) == 0) {
/* If target suspended put incoming I/O in retry_q. */
qla2x00_extend_timeout(sp->cmd, 10);
add_to_scsi_retry_queue(ha, sp);
} else
was_empty = add_to_pending_queue(ha, sp);
if ((IS_QLA2100(ha) || IS_QLA2200(ha)) && ha->flags.online) {
if (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
unsigned long flags;
spin_lock_irqsave(&ha->hardware_lock, flags);
qla2x00_process_response_queue(ha);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
}
}
/* We submit to the hardware if:
*
* 1) we're on the cpu the irq's arrive on or
* 2) there are very few io's outstanding.
*
* In all other cases we'll let an irq pick up our IO and submit it
* to the controller to improve affinity.
*/
if (_smp_processor_id() == ha->last_irq_cpu || was_empty)
qla2x00_next(ha);
spin_lock_irq(ha->host->host_lock);
return (0);
}
/*
* qla2x00_eh_wait_on_command
* Waits for the command to be returned by the Firmware for some
* max time.
*
* Input:
* ha = actual ha whose done queue will contain the command
* returned by firmware.
* cmd = Scsi Command to wait on.
* flag = Abort/Reset(Bus or Device Reset)
*
* Return:
* Not Found : 0
* Found : 1
*/
static int
qla2x00_eh_wait_on_command(scsi_qla_host_t *ha, struct scsi_cmnd *cmd)
{
#define ABORT_POLLING_PERIOD HZ
#define ABORT_WAIT_TIME ((10 * HZ) / (ABORT_POLLING_PERIOD))
int found = 0;
int done = 0;
srb_t *rp = NULL;
struct list_head *list, *temp;
u_long max_wait_time = ABORT_WAIT_TIME;
do {
/* Check on done queue */
spin_lock(&ha->list_lock);
list_for_each_safe(list, temp, &ha->done_queue) {
rp = list_entry(list, srb_t, list);
/*
* Found command. Just exit and wait for the cmd sent
* to OS.
*/
if (cmd == rp->cmd) {
found++;
DEBUG3(printk("%s: found in done queue.\n",
__func__);)
break;
}
}
spin_unlock(&ha->list_lock);
/* Complete the cmd right away. */
if (found) {
qla2x00_delete_from_done_queue(ha, rp);
sp_put(ha, rp);
done++;
break;
}
spin_unlock_irq(ha->host->host_lock);
set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout(ABORT_POLLING_PERIOD);
spin_lock_irq(ha->host->host_lock);
} while ((max_wait_time--));
if (done)
DEBUG2(printk(KERN_INFO "%s: found cmd=%p.\n", __func__, cmd));
return (done);
}
/*
* qla2x00_wait_for_hba_online
* Wait till the HBA is online after going through
* <= MAX_RETRIES_OF_ISP_ABORT or
* finally HBA is disabled ie marked offline
*
* Input:
* ha - pointer to host adapter structure
*
* Note:
* Does context switching-Release SPIN_LOCK
* (if any) before calling this routine.
*
* Return:
* Success (Adapter is online) : 0
* Failed (Adapter is offline/disabled) : 1
*/
static int
qla2x00_wait_for_hba_online(scsi_qla_host_t *ha)
{
int return_status;
unsigned long wait_online;
wait_online = jiffies + (MAX_LOOP_TIMEOUT * HZ);
while (((test_bit(ISP_ABORT_NEEDED, &ha->dpc_flags)) ||
test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags) ||
test_bit(ISP_ABORT_RETRY, &ha->dpc_flags) ||
ha->dpc_active) && time_before(jiffies, wait_online)) {
msleep(1000);
}
if (ha->flags.online)
return_status = QLA_SUCCESS;
else
return_status = QLA_FUNCTION_FAILED;
DEBUG2(printk("%s return_status=%d\n",__func__,return_status));
return (return_status);
}
/*
* qla2x00_wait_for_loop_ready
* Wait for MAX_LOOP_TIMEOUT(5 min) value for loop
* to be in LOOP_READY state.
* Input:
* ha - pointer to host adapter structure
*
* Note:
* Does context switching-Release SPIN_LOCK
* (if any) before calling this routine.
*
*
* Return:
* Success (LOOP_READY) : 0
* Failed (LOOP_NOT_READY) : 1
*/
static inline int
qla2x00_wait_for_loop_ready(scsi_qla_host_t *ha)
{
int return_status = QLA_SUCCESS;
unsigned long loop_timeout ;
/* wait for 5 min at the max for loop to be ready */
loop_timeout = jiffies + (MAX_LOOP_TIMEOUT * HZ);
while ((!atomic_read(&ha->loop_down_timer) &&
atomic_read(&ha->loop_state) == LOOP_DOWN) ||
test_bit(CFG_ACTIVE, &ha->cfg_flags) ||
atomic_read(&ha->loop_state) != LOOP_READY) {
msleep(1000);
if (time_after_eq(jiffies, loop_timeout)) {
return_status = QLA_FUNCTION_FAILED;
break;
}
}
return (return_status);
}
/**************************************************************************
* qla2xxx_eh_abort
*
* Description:
* The abort function will abort the specified command.
*
* Input:
* cmd = Linux SCSI command packet to be aborted.
*
* Returns:
* Either SUCCESS or FAILED.
*
* Note:
**************************************************************************/
int
qla2xxx_eh_abort(struct scsi_cmnd *cmd)
{
int i;
int return_status = FAILED;
os_lun_t *q;
scsi_qla_host_t *ha;
scsi_qla_host_t *vis_ha;
srb_t *sp;
srb_t *rp;
struct list_head *list, *temp;
struct Scsi_Host *host;
uint8_t found = 0;
unsigned int b, t, l;
/* Get the SCSI request ptr */
sp = (srb_t *) CMD_SP(cmd);
/*
* If sp is NULL, command is already returned.
* sp is NULLED just before we call back scsi_done
*
*/
if ((sp == NULL)) {
/* no action - we don't have command */
qla_printk(KERN_INFO, to_qla_host(cmd->device->host),
"qla2xxx_eh_abort: cmd already done sp=%p\n", sp);
DEBUG(printk("qla2xxx_eh_abort: cmd already done sp=%p\n", sp);)
return SUCCESS;
}
if (sp) {
DEBUG(printk("qla2xxx_eh_abort: refcount %i \n",
atomic_read(&sp->ref_count));)
}
vis_ha = (scsi_qla_host_t *) cmd->device->host->hostdata;
ha = (scsi_qla_host_t *)cmd->device->host->hostdata;
host = ha->host;
/* Generate LU queue on bus, target, LUN */
b = cmd->device->channel;
t = cmd->device->id;
l = cmd->device->lun;
q = GET_LU_Q(vis_ha, t, l);
qla_printk(KERN_INFO, ha,
"%s scsi(%ld:%d:%d:%d): cmd_timeout_in_sec=0x%x.\n", __func__,
ha->host_no, (int)b, (int)t, (int)l,
cmd->timeout_per_command / HZ);
/*
* if no LUN queue then something is very wrong!!!
*/
if (q == NULL) {
qla_printk(KERN_WARNING, ha,
"qla2x00: (%x:%x:%x) No LUN queue.\n", b, t, l);
/* no action - we don't have command */
return FAILED;
}
DEBUG2(printk("scsi(%ld): ABORTing cmd=%p sp=%p jiffies = 0x%lx, "
"timeout=%x, dpc_flags=%lx, vis_ha->dpc_flags=%lx q->flag=%lx\n",
ha->host_no, cmd, sp, jiffies, cmd->timeout_per_command / HZ,
ha->dpc_flags, vis_ha->dpc_flags, q->q_flag));
DEBUG2(qla2x00_print_scsi_cmd(cmd));
spin_unlock_irq(ha->host->host_lock);
if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS) {
DEBUG2(printk("%s failed:board disabled\n", __func__);)
spin_lock_irq(ha->host->host_lock);
return FAILED;
}
spin_lock_irq(ha->host->host_lock);
/* Search done queue */
spin_lock(&ha->list_lock);
list_for_each_safe(list, temp, &ha->done_queue) {
rp = list_entry(list, srb_t, list);
if (cmd != rp->cmd)
continue;
/*
* Found command.Remove it from done list.
* And proceed to post completion to scsi mid layer.
*/
return_status = SUCCESS;
found++;
qla2x00_delete_from_done_queue(ha, sp);
break;
} /* list_for_each_safe() */
spin_unlock(&ha->list_lock);
/*
* Return immediately if the aborted command was already in the done
* queue
*/
if (found) {
qla_printk(KERN_INFO, ha,
"qla2xxx_eh_abort: Returning completed command=%p sp=%p\n",
cmd, sp);
sp_put(ha, sp);
return (return_status);
}
/*
* See if this command is in the retry queue
*/
DEBUG3(printk("qla2xxx_eh_abort: searching sp %p in retry "
"queue.\n", sp);)
spin_lock(&ha->list_lock);
list_for_each_safe(list, temp, &ha->retry_queue) {
rp = list_entry(list, srb_t, list);
if (cmd != rp->cmd)
continue;
DEBUG2(printk("qla2xxx_eh_abort: found "
"in retry queue. SP=%p\n", sp);)
__del_from_retry_queue(ha, rp);
cmd->result = DID_ABORT << 16;
__add_to_done_queue(ha, rp);
return_status = SUCCESS;
found++;
break;
}
spin_unlock(&ha->list_lock);
/*
* Our SP pointer points at the command we want to remove from the
* pending queue providing we haven't already sent it to the adapter.
*/
if (!found) {
DEBUG3(printk("qla2xxx_eh_abort: searching sp %p "
"in pending queue.\n", sp);)
spin_lock(&vis_ha->list_lock);
list_for_each_safe(list, temp, &vis_ha->pending_queue) {
rp = list_entry(list, srb_t, list);
if (rp->cmd != cmd)
continue;
/* Remove srb from LUN queue. */
rp->flags |= SRB_ABORTED;
DEBUG2(printk("qla2xxx_eh_abort: Cmd in pending queue."
" serial_number %ld.\n",
sp->cmd->serial_number);)
__del_from_pending_queue(vis_ha, rp);
cmd->result = DID_ABORT << 16;
__add_to_done_queue(vis_ha, rp);
return_status = SUCCESS;
found++;
break;
} /* list_for_each_safe() */
spin_unlock(&vis_ha->list_lock);
} /*End of if !found */
if (!found) { /* find the command in our active list */
DEBUG3(printk("qla2xxx_eh_abort: searching sp %p "
"in outstanding queue.\n", sp);)
spin_lock(&ha->hardware_lock);
for (i = 1; i < MAX_OUTSTANDING_COMMANDS; i++) {
sp = ha->outstanding_cmds[i];
if (sp == NULL)
continue;
if (sp->cmd != cmd)
continue;
DEBUG2(printk("qla2xxx_eh_abort(%ld): aborting sp %p "
"from RISC. pid=%ld sp->state=%x q->q_flag=%lx\n",
ha->host_no, sp, sp->cmd->serial_number,
sp->state, q->q_flag);)
DEBUG(qla2x00_print_scsi_cmd(cmd);)
/* Get a reference to the sp and drop the lock.*/
sp_get(ha, sp);
spin_unlock(&ha->hardware_lock);
spin_unlock_irq(ha->host->host_lock);
if (qla2x00_abort_command(ha, sp)) {
DEBUG2(printk("qla2xxx_eh_abort: abort_command "
"mbx failed.\n");)
return_status = FAILED;
} else {
DEBUG3(printk("qla2xxx_eh_abort: abort_command "
" mbx success.\n");)
return_status = SUCCESS;
}
sp_put(ha,sp);
spin_lock_irq(ha->host->host_lock);
spin_lock(&ha->hardware_lock);
/*
* Regardless of mailbox command status, go check on
* done queue just in case the sp is already done.
*/
break;
}/*End of for loop */
spin_unlock(&ha->hardware_lock);
} /*End of if !found */
/* Waiting for our command in done_queue to be returned to OS.*/
if (qla2x00_eh_wait_on_command(ha, cmd) != 0) {
DEBUG2(printk("qla2xxx_eh_abort: cmd returned back to OS.\n");)
return_status = SUCCESS;
}
if (return_status == FAILED) {
qla_printk(KERN_INFO, ha,
"qla2xxx_eh_abort Exiting: status=Failed\n");
return FAILED;
}
DEBUG2(printk("qla2xxx_eh_abort: Exiting. return_status=0x%x.\n",
return_status));
return return_status;
}
/**************************************************************************
* qla2x00_eh_wait_for_pending_target_commands
*
* Description:
* Waits for all the commands to come back from the specified target.
*
* Input:
* ha - pointer to scsi_qla_host structure.
* t - target
* Returns:
* Either SUCCESS or FAILED.
*
* Note:
**************************************************************************/
static int
qla2x00_eh_wait_for_pending_target_commands(scsi_qla_host_t *ha, unsigned int t)
{
int cnt;
int status;
srb_t *sp;
struct scsi_cmnd *cmd;
status = 0;
/*
* Waiting for all commands for the designated target in the active
* array
*/
for (cnt = 1; cnt < MAX_OUTSTANDING_COMMANDS; cnt++) {
spin_lock(&ha->hardware_lock);
sp = ha->outstanding_cmds[cnt];
if (sp) {
cmd = sp->cmd;
spin_unlock(&ha->hardware_lock);
if (cmd->device->id == t) {
if (!qla2x00_eh_wait_on_command(ha, cmd)) {
status = 1;
break;
}
}
}
else {
spin_unlock(&ha->hardware_lock);
}
}
return (status);
}
/**************************************************************************
* qla2xxx_eh_device_reset
*
* Description:
* The device reset function will reset the target and abort any
* executing commands.
*
* NOTE: The use of SP is undefined within this context. Do *NOT*
* attempt to use this value, even if you determine it is
* non-null.
*
* Input:
* cmd = Linux SCSI command packet of the command that cause the
* bus device reset.
*
* Returns:
* SUCCESS/FAILURE (defined as macro in scsi.h).
*
**************************************************************************/
int
qla2xxx_eh_device_reset(struct scsi_cmnd *cmd)
{
int return_status;
unsigned int b, t, l;
scsi_qla_host_t *ha;
os_tgt_t *tq;
os_lun_t *lq;
fc_port_t *fcport_to_reset;
srb_t *rp;
struct list_head *list, *temp;
return_status = FAILED;
if (cmd == NULL) {
printk(KERN_INFO
"%s(): **** SCSI mid-layer passing in NULL cmd\n",
__func__);
return (return_status);
}
b = cmd->device->channel;
t = cmd->device->id;
l = cmd->device->lun;
ha = (scsi_qla_host_t *)cmd->device->host->hostdata;
tq = TGT_Q(ha, t);
if (tq == NULL) {
qla_printk(KERN_INFO, ha,
"%s(): **** CMD derives a NULL TGT_Q\n", __func__);
return (return_status);
}
lq = (os_lun_t *)LUN_Q(ha, t, l);
if (lq == NULL) {
printk(KERN_INFO
"%s(): **** CMD derives a NULL LUN_Q\n", __func__);
return (return_status);
}
fcport_to_reset = lq->fclun->fcport;
/* If we are coming in from the back-door, stall I/O until complete. */
if (!cmd->device->host->eh_active)
set_bit(TQF_SUSPENDED, &tq->flags);
qla_printk(KERN_INFO, ha,
"scsi(%ld:%d:%d:%d): DEVICE RESET ISSUED.\n", ha->host_no, b, t, l);
DEBUG2(printk(KERN_INFO
"scsi(%ld): DEVICE_RESET cmd=%p jiffies = 0x%lx, timeout=%x, "
"dpc_flags=%lx, status=%x allowed=%d cmd.state=%x\n",
ha->host_no, cmd, jiffies, cmd->timeout_per_command / HZ,
ha->dpc_flags, cmd->result, cmd->allowed, cmd->state));
/* Clear commands from the retry queue. */
spin_lock(&ha->list_lock);
list_for_each_safe(list, temp, &ha->retry_queue) {
rp = list_entry(list, srb_t, list);
if (t != rp->cmd->device->id)
continue;
DEBUG2(printk(KERN_INFO
"qla2xxx_eh_reset: found in retry queue. SP=%p\n", rp));
__del_from_retry_queue(ha, rp);
rp->cmd->result = DID_RESET << 16;
__add_to_done_queue(ha, rp);
}
spin_unlock(&ha->list_lock);
spin_unlock_irq(ha->host->host_lock);
if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS) {
DEBUG2(printk(KERN_INFO
"%s failed:board disabled\n",__func__));
spin_lock_irq(ha->host->host_lock);
goto eh_dev_reset_done;
}
if (qla2x00_wait_for_loop_ready(ha) == QLA_SUCCESS) {
if (qla2x00_device_reset(ha, fcport_to_reset) == 0) {
return_status = SUCCESS;
}
#if defined(LOGOUT_AFTER_DEVICE_RESET)
if (return_status == SUCCESS) {
if (fcport_to_reset->flags & FC_FABRIC_DEVICE) {
qla2x00_fabric_logout(ha,
fcport_to_reset->loop_id);
qla2x00_mark_device_lost(ha, fcport_to_reset);
}
}
#endif
} else {
DEBUG2(printk(KERN_INFO
"%s failed: loop not ready\n",__func__);)
}
spin_lock_irq(ha->host->host_lock);
if (return_status == FAILED) {
DEBUG3(printk("%s(%ld): device reset failed\n",
__func__, ha->host_no));
qla_printk(KERN_INFO, ha, "%s: device reset failed\n",
__func__);
goto eh_dev_reset_done;
}
/*
* If we are coming down the EH path, wait for all commands to
* complete for the device.
*/
if (cmd->device->host->eh_active) {
if (qla2x00_eh_wait_for_pending_target_commands(ha, t))
return_status = FAILED;
if (return_status == FAILED) {
DEBUG3(printk("%s(%ld): failed while waiting for "
"commands\n", __func__, ha->host_no));
qla_printk(KERN_INFO, ha,
"%s: failed while waiting for commands\n",
__func__);
goto eh_dev_reset_done;
}
}
qla_printk(KERN_INFO, ha,
"scsi(%ld:%d:%d:%d): DEVICE RESET SUCCEEDED.\n",
ha->host_no, b, t, l);
eh_dev_reset_done:
if (!cmd->device->host->eh_active)
clear_bit(TQF_SUSPENDED, &tq->flags);
return (return_status);
}
/**************************************************************************
* qla2x00_eh_wait_for_pending_commands
*
* Description:
* Waits for all the commands to come back from the specified host.
*
* Input:
* ha - pointer to scsi_qla_host structure.
*
* Returns:
* 1 : SUCCESS
* 0 : FAILED
*
* Note:
**************************************************************************/
static int
qla2x00_eh_wait_for_pending_commands(scsi_qla_host_t *ha)
{
int cnt;
int status;
srb_t *sp;
struct scsi_cmnd *cmd;
status = 1;
/*
* Waiting for all commands for the designated target in the active
* array
*/
for (cnt = 1; cnt < MAX_OUTSTANDING_COMMANDS; cnt++) {
spin_lock(&ha->hardware_lock);
sp = ha->outstanding_cmds[cnt];
if (sp) {
cmd = sp->cmd;
spin_unlock(&ha->hardware_lock);
status = qla2x00_eh_wait_on_command(ha, cmd);
if (status == 0)
break;
}
else {
spin_unlock(&ha->hardware_lock);
}
}
return (status);
}
/**************************************************************************
* qla2xxx_eh_bus_reset
*
* Description:
* The bus reset function will reset the bus and abort any executing
* commands.
*
* Input:
* cmd = Linux SCSI command packet of the command that cause the
* bus reset.
*
* Returns:
* SUCCESS/FAILURE (defined as macro in scsi.h).
*
**************************************************************************/
int
qla2xxx_eh_bus_reset(struct scsi_cmnd *cmd)
{
scsi_qla_host_t *ha;
srb_t *sp;
int rval = FAILED;
ha = (scsi_qla_host_t *) cmd->device->host->hostdata;
sp = (srb_t *) CMD_SP(cmd);
qla_printk(KERN_INFO, ha,
"scsi(%ld:%d:%d:%d): LOOP RESET ISSUED.\n", ha->host_no,
cmd->device->channel, cmd->device->id, cmd->device->lun);
spin_unlock_irq(ha->host->host_lock);
if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS) {
DEBUG2(printk("%s failed:board disabled\n",__func__));
spin_lock_irq(ha->host->host_lock);
return FAILED;
}
if (qla2x00_wait_for_loop_ready(ha) == QLA_SUCCESS) {
if (qla2x00_loop_reset(ha) == QLA_SUCCESS)
rval = SUCCESS;
}
spin_lock_irq(ha->host->host_lock);
if (rval == FAILED)
goto out;
/* Waiting for our command in done_queue to be returned to OS.*/
if (cmd->device->host->eh_active)
if (!qla2x00_eh_wait_for_pending_commands(ha))
rval = FAILED;
out:
qla_printk(KERN_INFO, ha, "%s: reset %s\n", __func__,
(rval == FAILED) ? "failed" : "succeded");
return rval;
}
/**************************************************************************
* qla2xxx_eh_host_reset
*
* Description:
* The reset function will reset the Adapter.
*
* Input:
* cmd = Linux SCSI command packet of the command that cause the
* adapter reset.
*
* Returns:
* Either SUCCESS or FAILED.
*
* Note:
**************************************************************************/
int
qla2xxx_eh_host_reset(struct scsi_cmnd *cmd)
{
scsi_qla_host_t *ha = (scsi_qla_host_t *)cmd->device->host->hostdata;
int rval = SUCCESS;
/* Display which one we're actually resetting for debug. */
DEBUG(printk("qla2xxx_eh_host_reset:Resetting scsi(%ld).\n",
ha->host_no));
/*
* Now issue reset.
*/
qla_printk(KERN_INFO, ha,
"scsi(%ld:%d:%d:%d): ADAPTER RESET issued.\n", ha->host_no,
cmd->device->channel, cmd->device->id, cmd->device->lun);
spin_unlock_irq(ha->host->host_lock);
if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS)
goto board_disabled;
/*
* Fixme-may be dpc thread is active and processing
* loop_resync,so wait a while for it to
* be completed and then issue big hammer.Otherwise
* it may cause I/O failure as big hammer marks the
* devices as lost kicking of the port_down_timer
* while dpc is stuck for the mailbox to complete.
*/
/* Blocking call-Does context switching if loop is Not Ready */
qla2x00_wait_for_loop_ready(ha);
set_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
if (qla2x00_abort_isp(ha)) {
clear_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
/* failed. schedule dpc to try */
set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS)
goto board_disabled;
}
clear_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
spin_lock_irq(ha->host->host_lock);
if (rval == FAILED)
goto out;
/* Waiting for our command in done_queue to be returned to OS.*/
if (!qla2x00_eh_wait_for_pending_commands(ha))
rval = FAILED;
out:
qla_printk(KERN_INFO, ha, "%s: reset %s\n", __func__,
(rval == FAILED) ? "failed" : "succeded");
return rval;
board_disabled:
spin_lock_irq(ha->host->host_lock);
qla_printk(KERN_INFO, ha, "%s: failed:board disabled\n", __func__);
return FAILED;
}
/*
* qla2x00_loop_reset
* Issue loop reset.
*
* Input:
* ha = adapter block pointer.
*
* Returns:
* 0 = success
*/
static int
qla2x00_loop_reset(scsi_qla_host_t *ha)
{
int status = QLA_SUCCESS;
uint16_t t;
os_tgt_t *tq;
if (ha->flags.enable_lip_reset) {
status = qla2x00_lip_reset(ha);
}
if (status == QLA_SUCCESS && ha->flags.enable_target_reset) {
for (t = 0; t < MAX_FIBRE_DEVICES; t++) {
if ((tq = TGT_Q(ha, t)) == NULL)
continue;
if (tq->fcport == NULL)
continue;
status = qla2x00_target_reset(ha, 0, t);
if (status != QLA_SUCCESS) {
break;
}
}
}
if (status == QLA_SUCCESS &&
((!ha->flags.enable_target_reset &&
!ha->flags.enable_lip_reset) ||
ha->flags.enable_lip_full_login)) {
status = qla2x00_full_login_lip(ha);
}
/* Issue marker command only when we are going to start the I/O */
ha->marker_needed = 1;
if (status) {
/* Empty */
DEBUG2_3(printk("%s(%ld): **** FAILED ****\n",
__func__,
ha->host_no);)
} else {
/* Empty */
DEBUG3(printk("%s(%ld): exiting normally.\n",
__func__,
ha->host_no);)
}
return(status);
}
/*
* qla2x00_device_reset
* Issue bus device reset message to the target.
*
* Input:
* ha = adapter block pointer.
* t = SCSI ID.
* TARGET_QUEUE_LOCK must be released.
* ADAPTER_STATE_LOCK must be released.
*
* Context:
* Kernel context.
*/
static int
qla2x00_device_reset(scsi_qla_host_t *ha, fc_port_t *reset_fcport)
{
/* Abort Target command will clear Reservation */
return qla2x00_abort_target(reset_fcport);
}
/**************************************************************************
* qla2xxx_slave_configure
*
* Description:
**************************************************************************/
int
qla2xxx_slave_configure(struct scsi_device *sdev)
{
scsi_qla_host_t *ha = to_qla_host(sdev->host);
int queue_depth;
if (IS_QLA2100(ha) || IS_QLA2200(ha))
queue_depth = 16;
else
queue_depth = 32;
if (sdev->tagged_supported) {
if (ql2xmaxqdepth != 0 && ql2xmaxqdepth <= 0xffffU)
queue_depth = ql2xmaxqdepth;
ql2xmaxqdepth = queue_depth;
scsi_activate_tcq(sdev, queue_depth);
qla_printk(KERN_INFO, ha,
"scsi(%d:%d:%d:%d): Enabled tagged queuing, queue "
"depth %d.\n",
sdev->host->host_no, sdev->channel, sdev->id, sdev->lun,
sdev->queue_depth);
} else {
scsi_adjust_queue_depth(sdev, 0 /* TCQ off */,
sdev->host->hostt->cmd_per_lun /* 3 */);
}
return (0);
}
/**
* qla2x00_config_dma_addressing() - Configure OS DMA addressing method.
* @ha: HA context
*
* At exit, the @ha's flags.enable_64bit_addressing set to indicated
* supported addressing method.
*/
static void
qla2x00_config_dma_addressing(scsi_qla_host_t *ha)
{
/* Assume 32bit DMA address */
ha->flags.enable_64bit_addressing = 0;
ha->calc_request_entries = qla2x00_calc_iocbs_32;
ha->build_scsi_iocbs = qla2x00_build_scsi_iocbs_32;
/*
* Given the two variants pci_set_dma_mask(), allow the compiler to
* assist in setting the proper dma mask.
*/
if (sizeof(dma_addr_t) > 4) {
if (pci_set_dma_mask(ha->pdev, DMA_64BIT_MASK) == 0) {
ha->flags.enable_64bit_addressing = 1;
ha->calc_request_entries = qla2x00_calc_iocbs_64;
ha->build_scsi_iocbs = qla2x00_build_scsi_iocbs_64;
if (pci_set_consistent_dma_mask(ha->pdev,
DMA_64BIT_MASK)) {
qla_printk(KERN_DEBUG, ha,
"Failed to set 64 bit PCI consistent mask; "
"using 32 bit.\n");
pci_set_consistent_dma_mask(ha->pdev,
DMA_32BIT_MASK);
}
} else {
qla_printk(KERN_DEBUG, ha,
"Failed to set 64 bit PCI DMA mask, falling back "
"to 32 bit MASK.\n");
pci_set_dma_mask(ha->pdev, DMA_32BIT_MASK);
}
} else {
pci_set_dma_mask(ha->pdev, DMA_32BIT_MASK);
}
}
static int
qla2x00_iospace_config(scsi_qla_host_t *ha)
{
unsigned long pio, pio_len, pio_flags;
unsigned long mmio, mmio_len, mmio_flags;
/* We only need PIO for Flash operations on ISP2312 v2 chips. */
pio = pci_resource_start(ha->pdev, 0);
pio_len = pci_resource_len(ha->pdev, 0);
pio_flags = pci_resource_flags(ha->pdev, 0);
if (pio_flags & IORESOURCE_IO) {
if (pio_len < MIN_IOBASE_LEN) {
qla_printk(KERN_WARNING, ha,
"Invalid PCI I/O region size (%s)...\n",
pci_name(ha->pdev));
pio = 0;
}
} else {
qla_printk(KERN_WARNING, ha,
"region #0 not a PIO resource (%s)...\n",
pci_name(ha->pdev));
pio = 0;
}
/* Use MMIO operations for all accesses. */
mmio = pci_resource_start(ha->pdev, 1);
mmio_len = pci_resource_len(ha->pdev, 1);
mmio_flags = pci_resource_flags(ha->pdev, 1);
if (!(mmio_flags & IORESOURCE_MEM)) {
qla_printk(KERN_ERR, ha,
"region #0 not an MMIO resource (%s), aborting\n",
pci_name(ha->pdev));
goto iospace_error_exit;
}
if (mmio_len < MIN_IOBASE_LEN) {
qla_printk(KERN_ERR, ha,
"Invalid PCI mem region size (%s), aborting\n",
pci_name(ha->pdev));
goto iospace_error_exit;
}
if (pci_request_regions(ha->pdev, ha->brd_info->drv_name)) {
qla_printk(KERN_WARNING, ha,
"Failed to reserve PIO/MMIO regions (%s)\n",
pci_name(ha->pdev));
goto iospace_error_exit;
}
ha->pio_address = pio;
ha->pio_length = pio_len;
ha->iobase = ioremap(mmio, MIN_IOBASE_LEN);
if (!ha->iobase) {
qla_printk(KERN_ERR, ha,
"cannot remap MMIO (%s), aborting\n", pci_name(ha->pdev));
goto iospace_error_exit;
}
return (0);
iospace_error_exit:
return (-ENOMEM);
}
/*
* PCI driver interface
*/
int qla2x00_probe_one(struct pci_dev *pdev, struct qla_board_info *brd_info)
{
int ret;
device_reg_t __iomem *reg;
struct Scsi_Host *host;
scsi_qla_host_t *ha;
unsigned long flags = 0;
unsigned long wait_switch = 0;
char pci_info[20];
char fw_str[30];
if (pci_enable_device(pdev))
return -1;
host = scsi_host_alloc(&qla2x00_driver_template,
sizeof(scsi_qla_host_t));
if (host == NULL) {
printk(KERN_WARNING
"qla2xxx: Couldn't allocate host from scsi layer!\n");
goto probe_disable_device;
}
/* Clear our data area */
ha = (scsi_qla_host_t *)host->hostdata;
memset(ha, 0, sizeof(scsi_qla_host_t));
ha->pdev = pdev;
ha->host = host;
ha->host_no = host->host_no;
ha->brd_info = brd_info;
sprintf(ha->host_str, "%s_%ld", ha->brd_info->drv_name, ha->host_no);
/* Configure PCI I/O space */
ret = qla2x00_iospace_config(ha);
if (ret != 0) {
goto probe_failed;
}
/* Sanitize the information from PCI BIOS. */
host->irq = pdev->irq;
qla_printk(KERN_INFO, ha,
"Found an %s, irq %d, iobase 0x%p\n", ha->brd_info->isp_name,
host->irq, ha->iobase);
spin_lock_init(&ha->hardware_lock);
/* 4.23 Initialize /proc/scsi/qla2x00 counters */
ha->actthreads = 0;
ha->qthreads = 0;
ha->total_isr_cnt = 0;
ha->total_isp_aborts = 0;
ha->total_lip_cnt = 0;
ha->total_dev_errs = 0;
ha->total_ios = 0;
ha->total_bytes = 0;
ha->prev_topology = 0;
ha->ports = MAX_BUSES;
if (IS_QLA2100(ha)) {
ha->max_targets = MAX_TARGETS_2100;
ha->mbx_count = MAILBOX_REGISTER_COUNT_2100;
ha->request_q_length = REQUEST_ENTRY_CNT_2100;
ha->response_q_length = RESPONSE_ENTRY_CNT_2100;
ha->last_loop_id = SNS_LAST_LOOP_ID_2100;
host->sg_tablesize = 32;
} else if (IS_QLA2200(ha)) {
ha->max_targets = MAX_TARGETS_2200;
ha->mbx_count = MAILBOX_REGISTER_COUNT;
ha->request_q_length = REQUEST_ENTRY_CNT_2200;
ha->response_q_length = RESPONSE_ENTRY_CNT_2100;
ha->last_loop_id = SNS_LAST_LOOP_ID_2100;
} else /*if (IS_QLA2300(ha))*/ {
ha->max_targets = MAX_TARGETS_2200;
ha->mbx_count = MAILBOX_REGISTER_COUNT;
ha->request_q_length = REQUEST_ENTRY_CNT_2200;
ha->response_q_length = RESPONSE_ENTRY_CNT_2300;
ha->last_loop_id = SNS_LAST_LOOP_ID_2300;
}
host->can_queue = ha->request_q_length + 128;
/* load the F/W, read paramaters, and init the H/W */
ha->instance = num_hosts;
init_MUTEX(&ha->mbx_cmd_sem);
init_MUTEX_LOCKED(&ha->mbx_intr_sem);
INIT_LIST_HEAD(&ha->list);
INIT_LIST_HEAD(&ha->fcports);
INIT_LIST_HEAD(&ha->rscn_fcports);
INIT_LIST_HEAD(&ha->done_queue);
INIT_LIST_HEAD(&ha->retry_queue);
INIT_LIST_HEAD(&ha->scsi_retry_queue);
INIT_LIST_HEAD(&ha->pending_queue);
/*
* These locks are used to prevent more than one CPU
* from modifying the queue at the same time. The
* higher level "host_lock" will reduce most
* contention for these locks.
*/
spin_lock_init(&ha->mbx_reg_lock);
spin_lock_init(&ha->list_lock);
ha->dpc_pid = -1;
init_completion(&ha->dpc_inited);
init_completion(&ha->dpc_exited);
qla2x00_config_dma_addressing(ha);
if (qla2x00_mem_alloc(ha)) {
qla_printk(KERN_WARNING, ha,
"[ERROR] Failed to allocate memory for adapter\n");
goto probe_failed;
}
if (qla2x00_initialize_adapter(ha) &&
!(ha->device_flags & DFLG_NO_CABLE)) {
qla_printk(KERN_WARNING, ha,
"Failed to initialize adapter\n");
DEBUG2(printk("scsi(%ld): Failed to initialize adapter - "
"Adapter flags %x.\n",
ha->host_no, ha->device_flags));
goto probe_failed;
}
/*
* Startup the kernel thread for this host adapter
*/
ha->dpc_should_die = 0;
ha->dpc_pid = kernel_thread(qla2x00_do_dpc, ha, 0);
if (ha->dpc_pid < 0) {
qla_printk(KERN_WARNING, ha,
"Unable to start DPC thread!\n");
goto probe_failed;
}
wait_for_completion(&ha->dpc_inited);
host->this_id = 255;
host->cmd_per_lun = 3;
host->max_cmd_len = MAX_CMDSZ;
host->max_channel = ha->ports - 1;
host->max_lun = ha->max_luns;
BUG_ON(qla2xxx_transport_template == NULL);
host->transportt = qla2xxx_transport_template;
host->unique_id = ha->instance;
host->max_id = ha->max_targets;
if (IS_QLA2100(ha) || IS_QLA2200(ha))
ret = request_irq(host->irq, qla2100_intr_handler,
SA_INTERRUPT|SA_SHIRQ, ha->brd_info->drv_name, ha);
else
ret = request_irq(host->irq, qla2300_intr_handler,
SA_INTERRUPT|SA_SHIRQ, ha->brd_info->drv_name, ha);
if (ret != 0) {
qla_printk(KERN_WARNING, ha,
"Failed to reserve interrupt %d already in use.\n",
host->irq);
goto probe_failed;
}
/* Initialized the timer */
qla2x00_start_timer(ha, qla2x00_timer, WATCH_INTERVAL);
DEBUG2(printk("DEBUG: detect hba %ld at address = %p\n",
ha->host_no, ha));
reg = ha->iobase;
/* Disable ISP interrupts. */
qla2x00_disable_intrs(ha);
/* Ensure mailbox registers are free. */
spin_lock_irqsave(&ha->hardware_lock, flags);
WRT_REG_WORD(&reg->semaphore, 0);
WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
WRT_REG_WORD(&reg->hccr, HCCR_CLR_HOST_INT);
/* Enable proper parity */
if (!IS_QLA2100(ha) && !IS_QLA2200(ha)) {
if (IS_QLA2300(ha))
/* SRAM parity */
WRT_REG_WORD(&reg->hccr, (HCCR_ENABLE_PARITY + 0x1));
else
/* SRAM, Instruction RAM and GP RAM parity */
WRT_REG_WORD(&reg->hccr, (HCCR_ENABLE_PARITY + 0x7));
}
spin_unlock_irqrestore(&ha->hardware_lock, flags);
/* Enable chip interrupts. */
qla2x00_enable_intrs(ha);
/* v2.19.5b6 */
/*
* Wait around max loop_reset_delay secs for the devices to come
* on-line. We don't want Linux scanning before we are ready.
*
*/
for (wait_switch = jiffies + (ha->loop_reset_delay * HZ);
time_before(jiffies,wait_switch) &&
!(ha->device_flags & (DFLG_NO_CABLE | DFLG_FABRIC_DEVICES))
&& (ha->device_flags & SWITCH_FOUND) ;) {
qla2x00_check_fabric_devices(ha);
msleep(10);
}
pci_set_drvdata(pdev, ha);
ha->flags.init_done = 1;
num_hosts++;
/* List the target we have found */
if (displayConfig) {
qla2x00_display_fc_names(ha);
}
if (scsi_add_host(host, &pdev->dev))
goto probe_failed;
sysfs_create_bin_file(&host->shost_gendev.kobj, &sysfs_fw_dump_attr);
sysfs_create_bin_file(&host->shost_gendev.kobj, &sysfs_nvram_attr);
qla_printk(KERN_INFO, ha, "\n"
" QLogic Fibre Channel HBA Driver: %s\n"
" QLogic %s - %s\n"
" %s: %s @ %s hdma%c, host#=%ld, fw=%s\n", qla2x00_version_str,
ha->model_number, ha->model_desc ? ha->model_desc: "",
ha->brd_info->isp_name, qla2x00_get_pci_info_str(ha, pci_info),
pci_name(ha->pdev), ha->flags.enable_64bit_addressing ? '+': '-',
ha->host_no, qla2x00_get_fw_version_str(ha, fw_str));
if (ql2xdoinitscan)
scsi_scan_host(host);
return 0;
probe_failed:
qla2x00_free_device(ha);
scsi_host_put(host);
probe_disable_device:
pci_disable_device(pdev);
return -1;
}
EXPORT_SYMBOL_GPL(qla2x00_probe_one);
void qla2x00_remove_one(struct pci_dev *pdev)
{
scsi_qla_host_t *ha;
ha = pci_get_drvdata(pdev);
sysfs_remove_bin_file(&ha->host->shost_gendev.kobj,
&sysfs_fw_dump_attr);
sysfs_remove_bin_file(&ha->host->shost_gendev.kobj, &sysfs_nvram_attr);
scsi_remove_host(ha->host);
qla2x00_free_device(ha);
scsi_host_put(ha->host);
pci_set_drvdata(pdev, NULL);
}
EXPORT_SYMBOL_GPL(qla2x00_remove_one);
static void
qla2x00_free_device(scsi_qla_host_t *ha)
{
int ret;
/* Abort any outstanding IO descriptors. */
if (!IS_QLA2100(ha) && !IS_QLA2200(ha))
qla2x00_cancel_io_descriptors(ha);
/* turn-off interrupts on the card */
if (ha->interrupts_on)
qla2x00_disable_intrs(ha);
/* Disable timer */
if (ha->timer_active)
qla2x00_stop_timer(ha);
/* Kill the kernel thread for this host */
if (ha->dpc_pid >= 0) {
ha->dpc_should_die = 1;
wmb();
ret = kill_proc(ha->dpc_pid, SIGHUP, 1);
if (ret) {
qla_printk(KERN_ERR, ha,
"Unable to signal DPC thread -- (%d)\n", ret);
/* TODO: SOMETHING MORE??? */
} else {
wait_for_completion(&ha->dpc_exited);
}
}
qla2x00_mem_free(ha);
ha->flags.online = 0;
/* Detach interrupts */
if (ha->pdev->irq)
free_irq(ha->pdev->irq, ha);
/* release io space registers */
if (ha->iobase)
iounmap(ha->iobase);
pci_release_regions(ha->pdev);
pci_disable_device(ha->pdev);
}
/*
* The following support functions are adopted to handle
* the re-entrant qla2x00_proc_info correctly.
*/
static void
copy_mem_info(struct info_str *info, char *data, int len)
{
if (info->pos + len > info->offset + info->length)
len = info->offset + info->length - info->pos;
if (info->pos + len < info->offset) {
info->pos += len;
return;
}
if (info->pos < info->offset) {
off_t partial;
partial = info->offset - info->pos;
data += partial;
info->pos += partial;
len -= partial;
}
if (len > 0) {
memcpy(info->buffer, data, len);
info->pos += len;
info->buffer += len;
}
}
static int
copy_info(struct info_str *info, char *fmt, ...)
{
va_list args;
char buf[256];
int len;
va_start(args, fmt);
len = vsprintf(buf, fmt, args);
va_end(args);
copy_mem_info(info, buf, len);
return (len);
}
/*************************************************************************
* qla2x00_proc_info
*
* Description:
* Return information to handle /proc support for the driver.
*
* inout : decides the direction of the dataflow and the meaning of the
* variables
* buffer: If inout==0 data is being written to it else read from it
* (ptr to a page buffer)
* *start: If inout==0 start of the valid data in the buffer
* offset: If inout==0 starting offset from the beginning of all
* possible data to return.
* length: If inout==0 max number of bytes to be written into the buffer
* else number of bytes in "buffer"
* Returns:
* < 0: error. errno value.
* >= 0: sizeof data returned.
*************************************************************************/
int
qla2x00_proc_info(struct Scsi_Host *shost, char *buffer,
char **start, off_t offset, int length, int inout)
{
struct info_str info;
int retval = -EINVAL;
os_lun_t *up;
os_tgt_t *tq;
unsigned int t, l;
uint32_t tmp_sn;
uint32_t *flags;
uint8_t *loop_state;
scsi_qla_host_t *ha;
char fw_info[30];
DEBUG3(printk(KERN_INFO
"Entering proc_info buff_in=%p, offset=0x%lx, length=0x%x\n",
buffer, offset, length);)
ha = (scsi_qla_host_t *) shost->hostdata;
if (inout) {
/* Has data been written to the file? */
DEBUG3(printk(
"%s: has data been written to the file. \n",
__func__);)
return -ENOSYS;
}
if (start) {
*start = buffer;
}
info.buffer = buffer;
info.length = length;
info.offset = offset;
info.pos = 0;
/* start building the print buffer */
copy_info(&info,
"QLogic PCI to Fibre Channel Host Adapter for %s:\n"
" Firmware version %s, ",
ha->model_number, qla2x00_get_fw_version_str(ha, fw_info));
copy_info(&info, "Driver version %s\n", qla2x00_version_str);
tmp_sn = ((ha->serial0 & 0x1f) << 16) | (ha->serial2 << 8) |
ha->serial1;
copy_info(&info, "ISP: %s, Serial# %c%05d\n",
ha->brd_info->isp_name, ('A' + tmp_sn/100000), (tmp_sn%100000));
copy_info(&info,
"Request Queue = 0x%llx, Response Queue = 0x%llx\n",
(unsigned long long)ha->request_dma,
(unsigned long long)ha->response_dma);
copy_info(&info,
"Request Queue count = %d, Response Queue count = %d\n",
ha->request_q_length, ha->response_q_length);
copy_info(&info,
"Total number of active commands = %ld\n",
ha->actthreads);
copy_info(&info,
"Total number of interrupts = %ld\n",
(long)ha->total_isr_cnt);
copy_info(&info,
" Device queue depth = 0x%x\n",
(ql2xmaxqdepth == 0) ? 16 : ql2xmaxqdepth);
copy_info(&info,
"Number of free request entries = %d\n", ha->req_q_cnt);
copy_info(&info,
"Number of mailbox timeouts = %ld\n", ha->total_mbx_timeout);
copy_info(&info,
"Number of ISP aborts = %ld\n", ha->total_isp_aborts);
copy_info(&info,
"Number of loop resyncs = %ld\n", ha->total_loop_resync);
copy_info(&info,
"Number of retries for empty slots = %ld\n",
qla2x00_stats.outarray_full);
copy_info(&info,
"Number of reqs in pending_q= %ld, retry_q= %d, "
"done_q= %ld, scsi_retry_q= %d\n",
ha->qthreads, ha->retry_q_cnt,
ha->done_q_cnt, ha->scsi_retry_q_cnt);
flags = (uint32_t *) &ha->flags;
if (atomic_read(&ha->loop_state) == LOOP_DOWN) {
loop_state = "DOWN";
} else if (atomic_read(&ha->loop_state) == LOOP_UP) {
loop_state = "UP";
} else if (atomic_read(&ha->loop_state) == LOOP_READY) {
loop_state = "READY";
} else if (atomic_read(&ha->loop_state) == LOOP_TIMEOUT) {
loop_state = "TIMEOUT";
} else if (atomic_read(&ha->loop_state) == LOOP_UPDATE) {
loop_state = "UPDATE";
} else {
loop_state = "UNKNOWN";
}
copy_info(&info,
"Host adapter:loop state = <%s>, flags = 0x%lx\n",
loop_state , *flags);
copy_info(&info, "Dpc flags = 0x%lx\n", ha->dpc_flags);
copy_info(&info, "MBX flags = 0x%x\n", ha->mbx_flags);
copy_info(&info, "Link down Timeout = %3.3d\n",
ha->link_down_timeout);
copy_info(&info, "Port down retry = %3.3d\n",
ha->port_down_retry_count);
copy_info(&info, "Login retry count = %3.3d\n",
ha->login_retry_count);
copy_info(&info,
"Commands retried with dropped frame(s) = %d\n",
ha->dropped_frame_error_cnt);
copy_info(&info,
"Product ID = %04x %04x %04x %04x\n", ha->product_id[0],
ha->product_id[1], ha->product_id[2], ha->product_id[3]);
copy_info(&info, "\n");
/* 2.25 node/port display to proc */
/* Display the node name for adapter */
copy_info(&info, "\nSCSI Device Information:\n");
copy_info(&info,
"scsi-qla%d-adapter-node="
"%02x%02x%02x%02x%02x%02x%02x%02x;\n",
(int)ha->instance,
ha->init_cb->node_name[0],
ha->init_cb->node_name[1],
ha->init_cb->node_name[2],
ha->init_cb->node_name[3],
ha->init_cb->node_name[4],
ha->init_cb->node_name[5],
ha->init_cb->node_name[6],
ha->init_cb->node_name[7]);
/* display the port name for adapter */
copy_info(&info,
"scsi-qla%d-adapter-port="
"%02x%02x%02x%02x%02x%02x%02x%02x;\n",
(int)ha->instance,
ha->init_cb->port_name[0],
ha->init_cb->port_name[1],
ha->init_cb->port_name[2],
ha->init_cb->port_name[3],
ha->init_cb->port_name[4],
ha->init_cb->port_name[5],
ha->init_cb->port_name[6],
ha->init_cb->port_name[7]);
/* Print out device port names */
for (t = 0; t < MAX_FIBRE_DEVICES; t++) {
if ((tq = TGT_Q(ha, t)) == NULL)
continue;
copy_info(&info,
"scsi-qla%d-target-%d="
"%02x%02x%02x%02x%02x%02x%02x%02x;\n",
(int)ha->instance, t,
tq->port_name[0], tq->port_name[1],
tq->port_name[2], tq->port_name[3],
tq->port_name[4], tq->port_name[5],
tq->port_name[6], tq->port_name[7]);
}
copy_info(&info, "\nSCSI LUN Information:\n");
copy_info(&info,
"(Id:Lun) * - indicates lun is not registered with the OS.\n");
/* scan for all equipment stats */
for (t = 0; t < MAX_FIBRE_DEVICES; t++) {
/* scan all luns */
for (l = 0; l < ha->max_luns; l++) {
up = (os_lun_t *) GET_LU_Q(ha, t, l);
if (up == NULL) {
continue;
}
if (up->fclun == NULL) {
continue;
}
copy_info(&info,
"(%2d:%2d): Total reqs %ld,",
t,l,up->io_cnt);
copy_info(&info,
" Pending reqs %ld,",
up->out_cnt);
if (up->io_cnt < 4) {
copy_info(&info,
" flags 0x%x*,",
(int)up->q_flag);
} else {
copy_info(&info,
" flags 0x%x,",
(int)up->q_flag);
}
copy_info(&info,
" %ld:%d:%02x %02x",
up->fclun->fcport->ha->instance,
up->fclun->fcport->cur_path,
up->fclun->fcport->loop_id,
up->fclun->device_type);
copy_info(&info, "\n");
if (info.pos >= info.offset + info.length) {
/* No need to continue */
goto profile_stop;
}
}
if (info.pos >= info.offset + info.length) {
/* No need to continue */
break;
}
}
profile_stop:
retval = info.pos > info.offset ? info.pos - info.offset : 0;
DEBUG3(printk(KERN_INFO
"Exiting proc_info: info.pos=%d, offset=0x%lx, "
"length=0x%x\n", info.pos, offset, length);)
return (retval);
}
/*
* qla2x00_display_fc_names
* This routine will the node names of the different devices found
* after port inquiry.
*
* Input:
* cmd = SCSI command structure
*
* Returns:
* None.
*/
static void
qla2x00_display_fc_names(scsi_qla_host_t *ha)
{
uint16_t tgt;
os_tgt_t *tq;
/* Display the node name for adapter */
qla_printk(KERN_INFO, ha,
"scsi-qla%d-adapter-node=%02x%02x%02x%02x%02x%02x%02x%02x\\;\n",
(int)ha->instance,
ha->init_cb->node_name[0],
ha->init_cb->node_name[1],
ha->init_cb->node_name[2],
ha->init_cb->node_name[3],
ha->init_cb->node_name[4],
ha->init_cb->node_name[5],
ha->init_cb->node_name[6],
ha->init_cb->node_name[7]);
/* display the port name for adapter */
qla_printk(KERN_INFO, ha,
"scsi-qla%d-adapter-port=%02x%02x%02x%02x%02x%02x%02x%02x\\;\n",
(int)ha->instance,
ha->init_cb->port_name[0],
ha->init_cb->port_name[1],
ha->init_cb->port_name[2],
ha->init_cb->port_name[3],
ha->init_cb->port_name[4],
ha->init_cb->port_name[5],
ha->init_cb->port_name[6],
ha->init_cb->port_name[7]);
/* Print out device port names */
for (tgt = 0; tgt < MAX_TARGETS; tgt++) {
if ((tq = ha->otgt[tgt]) == NULL)
continue;
if (tq->fcport == NULL)
continue;
switch (ha->binding_type) {
case BIND_BY_PORT_NAME:
qla_printk(KERN_INFO, ha,
"scsi-qla%d-tgt-%d-di-0-port="
"%02x%02x%02x%02x%02x%02x%02x%02x\\;\n",
(int)ha->instance,
tgt,
tq->port_name[0],
tq->port_name[1],
tq->port_name[2],
tq->port_name[3],
tq->port_name[4],
tq->port_name[5],
tq->port_name[6],
tq->port_name[7]);
break;
case BIND_BY_PORT_ID:
qla_printk(KERN_INFO, ha,
"scsi-qla%d-tgt-%d-di-0-pid="
"%02x%02x%02x\\;\n",
(int)ha->instance,
tgt,
tq->d_id.b.domain,
tq->d_id.b.area,
tq->d_id.b.al_pa);
break;
}
#if VSA
qla_printk(KERN_INFO, ha,
"scsi-qla%d-target-%d-vsa=01;\n", (int)ha->instance, tgt);
#endif
}
}
/*
* qla2x00_suspend_lun
* Suspend lun and start port down timer
*
* Input:
* ha = visable adapter block pointer.
* lq = lun queue
* cp = Scsi command pointer
* time = time in seconds
* count = number of times to let time expire
* delay_lun = non-zero, if lun should be delayed rather than suspended
*
* Return:
* QLA_SUCCESS -- suspended lun
* QLA_FUNCTION_FAILED -- Didn't suspend lun
*
* Context:
* Interrupt context.
*/
int
__qla2x00_suspend_lun(scsi_qla_host_t *ha,
os_lun_t *lq, int time, int count, int delay_lun)
{
int rval;
srb_t *sp;
struct list_head *list, *temp;
unsigned long flags;
rval = QLA_SUCCESS;
/* if the lun_q is already suspended then don't do it again */
if (lq->q_state == LUN_STATE_READY ||lq->q_state == LUN_STATE_RUN) {
spin_lock_irqsave(&lq->q_lock, flags);
if (lq->q_state == LUN_STATE_READY) {
lq->q_max = count;
lq->q_count = 0;
}
/* Set the suspend time usually 6 secs */
atomic_set(&lq->q_timer, time);
/* now suspend the lun */
lq->q_state = LUN_STATE_WAIT;
if (delay_lun) {
set_bit(LUN_EXEC_DELAYED, &lq->q_flag);
DEBUG(printk(KERN_INFO
"scsi(%ld): Delay lun execution for %d secs, "
"count=%d, max count=%d, state=%d\n",
ha->host_no,
time,
lq->q_count, lq->q_max, lq->q_state));
} else {
DEBUG(printk(KERN_INFO
"scsi(%ld): Suspend lun for %d secs, count=%d, "
"max count=%d, state=%d\n",
ha->host_no,
time,
lq->q_count, lq->q_max, lq->q_state));
}
spin_unlock_irqrestore(&lq->q_lock, flags);
/*
* Remove all pending commands from request queue and put them
* in the scsi_retry queue.
*/
spin_lock_irqsave(&ha->list_lock, flags);
list_for_each_safe(list, temp, &ha->pending_queue) {
sp = list_entry(list, srb_t, list);
if (sp->lun_queue != lq)
continue;
__del_from_pending_queue(ha, sp);
if (sp->cmd->allowed < count)
sp->cmd->allowed = count;
__add_to_scsi_retry_queue(ha, sp);
} /* list_for_each_safe */
spin_unlock_irqrestore(&ha->list_lock, flags);
rval = QLA_SUCCESS;
} else {
rval = QLA_FUNCTION_FAILED;
}
return (rval);
}
/*
* qla2x00_mark_device_lost Updates fcport state when device goes offline.
*
* Input: ha = adapter block pointer. fcport = port structure pointer.
*
* Return: None.
*
* Context:
*/
void qla2x00_mark_device_lost(scsi_qla_host_t *ha, fc_port_t *fcport,
int do_login)
{
/*
* We may need to retry the login, so don't change the state of the
* port but do the retries.
*/
if (atomic_read(&fcport->state) != FCS_DEVICE_DEAD)
atomic_set(&fcport->state, FCS_DEVICE_LOST);
if (!do_login)
return;
if (fcport->login_retry == 0) {
fcport->login_retry = ha->login_retry_count;
set_bit(RELOGIN_NEEDED, &ha->dpc_flags);
DEBUG(printk("scsi(%ld): Port login retry: "
"%02x%02x%02x%02x%02x%02x%02x%02x, "
"id = 0x%04x retry cnt=%d\n",
ha->host_no,
fcport->port_name[0],
fcport->port_name[1],
fcport->port_name[2],
fcport->port_name[3],
fcport->port_name[4],
fcport->port_name[5],
fcport->port_name[6],
fcport->port_name[7],
fcport->loop_id,
fcport->login_retry));
}
}
/*
* qla2x00_mark_all_devices_lost
* Updates fcport state when device goes offline.
*
* Input:
* ha = adapter block pointer.
* fcport = port structure pointer.
*
* Return:
* None.
*
* Context:
*/
void
qla2x00_mark_all_devices_lost(scsi_qla_host_t *ha)
{
fc_port_t *fcport;
list_for_each_entry(fcport, &ha->fcports, list) {
if (fcport->port_type != FCT_TARGET)
continue;
/*
* No point in marking the device as lost, if the device is
* already DEAD.
*/
if (atomic_read(&fcport->state) == FCS_DEVICE_DEAD)
continue;
atomic_set(&fcport->state, FCS_DEVICE_LOST);
}
}
/*
* qla2x00_mem_alloc
* Allocates adapter memory.
*
* Returns:
* 0 = success.
* 1 = failure.
*/
static uint8_t
qla2x00_mem_alloc(scsi_qla_host_t *ha)
{
char name[16];
uint8_t status = 1;
int retry= 10;
do {
/*
* This will loop only once if everything goes well, else some
* number of retries will be performed to get around a kernel
* bug where available mem is not allocated until after a
* little delay and a retry.
*/
ha->request_ring = dma_alloc_coherent(&ha->pdev->dev,
(ha->request_q_length + 1) * sizeof(request_t),
&ha->request_dma, GFP_KERNEL);
if (ha->request_ring == NULL) {
qla_printk(KERN_WARNING, ha,
"Memory Allocation failed - request_ring\n");
qla2x00_mem_free(ha);
msleep(100);
continue;
}
ha->response_ring = dma_alloc_coherent(&ha->pdev->dev,
(ha->response_q_length + 1) * sizeof(response_t),
&ha->response_dma, GFP_KERNEL);
if (ha->response_ring == NULL) {
qla_printk(KERN_WARNING, ha,
"Memory Allocation failed - response_ring\n");
qla2x00_mem_free(ha);
msleep(100);
continue;
}
ha->gid_list = dma_alloc_coherent(&ha->pdev->dev, GID_LIST_SIZE,
&ha->gid_list_dma, GFP_KERNEL);
if (ha->gid_list == NULL) {
qla_printk(KERN_WARNING, ha,
"Memory Allocation failed - gid_list\n");
qla2x00_mem_free(ha);
msleep(100);
continue;
}
ha->rlc_rsp = dma_alloc_coherent(&ha->pdev->dev,
sizeof(rpt_lun_cmd_rsp_t), &ha->rlc_rsp_dma, GFP_KERNEL);
if (ha->rlc_rsp == NULL) {
qla_printk(KERN_WARNING, ha,
"Memory Allocation failed - rlc");
qla2x00_mem_free(ha);
msleep(100);
continue;
}
snprintf(name, sizeof(name), "qla2xxx_%ld", ha->host_no);
ha->s_dma_pool = dma_pool_create(name, &ha->pdev->dev,
DMA_POOL_SIZE, 8, 0);
if (ha->s_dma_pool == NULL) {
qla_printk(KERN_WARNING, ha,
"Memory Allocation failed - s_dma_pool\n");
qla2x00_mem_free(ha);
msleep(100);
continue;
}
/* get consistent memory allocated for init control block */
ha->init_cb = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL,
&ha->init_cb_dma);
if (ha->init_cb == NULL) {
qla_printk(KERN_WARNING, ha,
"Memory Allocation failed - init_cb\n");
qla2x00_mem_free(ha);
msleep(100);
continue;
}
memset(ha->init_cb, 0, sizeof(init_cb_t));
/* Get consistent memory allocated for Get Port Database cmd */
ha->iodesc_pd = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL,
&ha->iodesc_pd_dma);
if (ha->iodesc_pd == NULL) {
/* error */
qla_printk(KERN_WARNING, ha,
"Memory Allocation failed - iodesc_pd\n");
qla2x00_mem_free(ha);
msleep(100);
continue;
}
memset(ha->iodesc_pd, 0, PORT_DATABASE_SIZE);
/* Allocate ioctl related memory. */
if (qla2x00_alloc_ioctl_mem(ha)) {
qla_printk(KERN_WARNING, ha,
"Memory Allocation failed - ioctl_mem\n");
qla2x00_mem_free(ha);
msleep(100);
continue;
}
if (qla2x00_allocate_sp_pool(ha)) {
qla_printk(KERN_WARNING, ha,
"Memory Allocation failed - "
"qla2x00_allocate_sp_pool()\n");
qla2x00_mem_free(ha);
msleep(100);
continue;
}
/* Allocate memory for SNS commands */
if (IS_QLA2100(ha) || IS_QLA2200(ha)) {
/* Get consistent memory allocated for SNS commands */
ha->sns_cmd = dma_alloc_coherent(&ha->pdev->dev,
sizeof(struct sns_cmd_pkt), &ha->sns_cmd_dma,
GFP_KERNEL);
if (ha->sns_cmd == NULL) {
/* error */
qla_printk(KERN_WARNING, ha,
"Memory Allocation failed - sns_cmd\n");
qla2x00_mem_free(ha);
msleep(100);
continue;
}
memset(ha->sns_cmd, 0, sizeof(struct sns_cmd_pkt));
} else {
/* Get consistent memory allocated for MS IOCB */
ha->ms_iocb = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL,
&ha->ms_iocb_dma);
if (ha->ms_iocb == NULL) {
/* error */
qla_printk(KERN_WARNING, ha,
"Memory Allocation failed - ms_iocb\n");
qla2x00_mem_free(ha);
msleep(100);
continue;
}
memset(ha->ms_iocb, 0, sizeof(ms_iocb_entry_t));
/*
* Get consistent memory allocated for CT SNS
* commands
*/
ha->ct_sns = dma_alloc_coherent(&ha->pdev->dev,
sizeof(struct ct_sns_pkt), &ha->ct_sns_dma,
GFP_KERNEL);
if (ha->ct_sns == NULL) {
/* error */
qla_printk(KERN_WARNING, ha,
"Memory Allocation failed - ct_sns\n");
qla2x00_mem_free(ha);
msleep(100);
continue;
}
memset(ha->ct_sns, 0, sizeof(struct ct_sns_pkt));
}
/* Done all allocations without any error. */
status = 0;
} while (retry-- && status != 0);
if (status) {
printk(KERN_WARNING
"%s(): **** FAILED ****\n", __func__);
}
return(status);
}
/*
* qla2x00_mem_free
* Frees all adapter allocated memory.
*
* Input:
* ha = adapter block pointer.
*/
static void
qla2x00_mem_free(scsi_qla_host_t *ha)
{
uint32_t t;
struct list_head *fcpl, *fcptemp;
fc_port_t *fcport;
struct list_head *fcll, *fcltemp;
fc_lun_t *fclun;
unsigned long wtime;/* max wait time if mbx cmd is busy. */
if (ha == NULL) {
/* error */
DEBUG2(printk("%s(): ERROR invalid ha pointer.\n", __func__));
return;
}
/* Free the target queues */
for (t = 0; t < MAX_TARGETS; t++) {
qla2x00_tgt_free(ha, t);
}
/* Make sure all other threads are stopped. */
wtime = 60 * HZ;
while (ha->dpc_wait && wtime) {
set_current_state(TASK_INTERRUPTIBLE);
wtime = schedule_timeout(wtime);
}
/* free ioctl memory */
qla2x00_free_ioctl_mem(ha);
/* free sp pool */
qla2x00_free_sp_pool(ha);
if (ha->sns_cmd)
dma_free_coherent(&ha->pdev->dev, sizeof(struct sns_cmd_pkt),
ha->sns_cmd, ha->sns_cmd_dma);
if (ha->ct_sns)
dma_free_coherent(&ha->pdev->dev, sizeof(struct ct_sns_pkt),
ha->ct_sns, ha->ct_sns_dma);
if (ha->ms_iocb)
dma_pool_free(ha->s_dma_pool, ha->ms_iocb, ha->ms_iocb_dma);
if (ha->iodesc_pd)
dma_pool_free(ha->s_dma_pool, ha->iodesc_pd, ha->iodesc_pd_dma);
if (ha->init_cb)
dma_pool_free(ha->s_dma_pool, ha->init_cb, ha->init_cb_dma);
if (ha->s_dma_pool)
dma_pool_destroy(ha->s_dma_pool);
if (ha->rlc_rsp)
dma_free_coherent(&ha->pdev->dev,
sizeof(rpt_lun_cmd_rsp_t), ha->rlc_rsp,
ha->rlc_rsp_dma);
if (ha->gid_list)
dma_free_coherent(&ha->pdev->dev, GID_LIST_SIZE, ha->gid_list,
ha->gid_list_dma);
if (ha->response_ring)
dma_free_coherent(&ha->pdev->dev,
(ha->response_q_length + 1) * sizeof(response_t),
ha->response_ring, ha->response_dma);
if (ha->request_ring)
dma_free_coherent(&ha->pdev->dev,
(ha->request_q_length + 1) * sizeof(request_t),
ha->request_ring, ha->request_dma);
ha->sns_cmd = NULL;
ha->sns_cmd_dma = 0;
ha->ct_sns = NULL;
ha->ct_sns_dma = 0;
ha->ms_iocb = NULL;
ha->ms_iocb_dma = 0;
ha->iodesc_pd = NULL;
ha->iodesc_pd_dma = 0;
ha->init_cb = NULL;
ha->init_cb_dma = 0;
ha->s_dma_pool = NULL;
ha->rlc_rsp = NULL;
ha->rlc_rsp_dma = 0;
ha->gid_list = NULL;
ha->gid_list_dma = 0;
ha->response_ring = NULL;
ha->response_dma = 0;
ha->request_ring = NULL;
ha->request_dma = 0;
list_for_each_safe(fcpl, fcptemp, &ha->fcports) {
fcport = list_entry(fcpl, fc_port_t, list);
/* fc luns */
list_for_each_safe(fcll, fcltemp, &fcport->fcluns) {
fclun = list_entry(fcll, fc_lun_t, list);
list_del_init(&fclun->list);
kfree(fclun);
}
/* fc ports */
list_del_init(&fcport->list);
kfree(fcport);
}
INIT_LIST_HEAD(&ha->fcports);
if (ha->fw_dump)
free_pages((unsigned long)ha->fw_dump, ha->fw_dump_order);
if (ha->fw_dump_buffer)
vfree(ha->fw_dump_buffer);
ha->fw_dump = NULL;
ha->fw_dump_reading = 0;
ha->fw_dump_buffer = NULL;
}
/*
* qla2x00_allocate_sp_pool
* This routine is called during initialization to allocate
* memory for local srb_t.
*
* Input:
* ha = adapter block pointer.
*
* Context:
* Kernel context.
*
* Note: Sets the ref_count for non Null sp to one.
*/
static int
qla2x00_allocate_sp_pool(scsi_qla_host_t *ha)
{
int rval;
rval = QLA_SUCCESS;
ha->srb_mempool = mempool_create(SRB_MIN_REQ, mempool_alloc_slab,
mempool_free_slab, srb_cachep);
if (ha->srb_mempool == NULL) {
qla_printk(KERN_INFO, ha, "Unable to allocate SRB mempool.\n");
rval = QLA_FUNCTION_FAILED;
}
return (rval);
}
/*
* This routine frees all adapter allocated memory.
*
*/
static void
qla2x00_free_sp_pool( scsi_qla_host_t *ha)
{
if (ha->srb_mempool) {
mempool_destroy(ha->srb_mempool);
ha->srb_mempool = NULL;
}
}
/**************************************************************************
* qla2x00_do_dpc
* This kernel thread is a task that is schedule by the interrupt handler
* to perform the background processing for interrupts.
*
* Notes:
* This task always run in the context of a kernel thread. It
* is kick-off by the driver's detect code and starts up
* up one per adapter. It immediately goes to sleep and waits for
* some fibre event. When either the interrupt handler or
* the timer routine detects a event it will one of the task
* bits then wake us up.
**************************************************************************/
static int
qla2x00_do_dpc(void *data)
{
DECLARE_MUTEX_LOCKED(sem);
scsi_qla_host_t *ha;
fc_port_t *fcport;
os_lun_t *q;
srb_t *sp;
uint8_t status;
unsigned long flags = 0;
struct list_head *list, *templist;
int dead_cnt, online_cnt;
int retry_cmds = 0;
uint16_t next_loopid;
int t;
os_tgt_t *tq;
ha = (scsi_qla_host_t *)data;
lock_kernel();
daemonize("%s_dpc", ha->host_str);
allow_signal(SIGHUP);
ha->dpc_wait = &sem;
set_user_nice(current, -20);
unlock_kernel();
complete(&ha->dpc_inited);
while (1) {
DEBUG3(printk("qla2x00: DPC handler sleeping\n"));
if (down_interruptible(&sem))
break;
if (ha->dpc_should_die)
break;
DEBUG3(printk("qla2x00: DPC handler waking up\n"));
/* Initialization not yet finished. Don't do anything yet. */
if (!ha->flags.init_done || ha->dpc_active)
continue;
DEBUG3(printk("scsi(%ld): DPC handler\n", ha->host_no));
ha->dpc_active = 1;
if (!list_empty(&ha->done_queue))
qla2x00_done(ha);
/* Process commands in retry queue */
if (test_and_clear_bit(PORT_RESTART_NEEDED, &ha->dpc_flags)) {
DEBUG(printk("scsi(%ld): DPC checking retry_q. "
"total=%d\n",
ha->host_no, ha->retry_q_cnt));
spin_lock_irqsave(&ha->list_lock, flags);
dead_cnt = online_cnt = 0;
list_for_each_safe(list, templist, &ha->retry_queue) {
sp = list_entry(list, srb_t, list);
q = sp->lun_queue;
DEBUG3(printk("scsi(%ld): pid=%ld sp=%p, "
"spflags=0x%x, q_flag= 0x%lx\n",
ha->host_no, sp->cmd->serial_number, sp,
sp->flags, q->q_flag));
if (q == NULL)
continue;
fcport = q->fclun->fcport;
if (atomic_read(&fcport->state) ==
FCS_DEVICE_DEAD ||
atomic_read(&fcport->ha->loop_state) == LOOP_DEAD) {
__del_from_retry_queue(ha, sp);
sp->cmd->result = DID_NO_CONNECT << 16;
if (atomic_read(&fcport->ha->loop_state) ==
LOOP_DOWN)
sp->err_id = SRB_ERR_LOOP;
else
sp->err_id = SRB_ERR_PORT;
sp->cmd->host_scribble =
(unsigned char *) NULL;
__add_to_done_queue(ha, sp);
dead_cnt++;
} else if (atomic_read(&fcport->state) !=
FCS_DEVICE_LOST) {
__del_from_retry_queue(ha, sp);
sp->cmd->result = DID_BUS_BUSY << 16;
sp->cmd->host_scribble =
(unsigned char *) NULL;
__add_to_done_queue(ha, sp);
online_cnt++;
}
} /* list_for_each_safe() */
spin_unlock_irqrestore(&ha->list_lock, flags);
DEBUG(printk("scsi(%ld): done processing retry queue "
"- dead=%d, online=%d\n ",
ha->host_no, dead_cnt, online_cnt));
}
/* Process commands in scsi retry queue */
if (test_and_clear_bit(SCSI_RESTART_NEEDED, &ha->dpc_flags)) {
/*
* Any requests we want to delay for some period is put
* in the scsi retry queue with a delay added. The
* timer will schedule a "scsi_restart_needed" every
* second as long as there are requests in the scsi
* queue.
*/
DEBUG(printk("scsi(%ld): DPC checking scsi "
"retry_q.total=%d\n",
ha->host_no, ha->scsi_retry_q_cnt));
online_cnt = 0;
spin_lock_irqsave(&ha->list_lock, flags);
list_for_each_safe(list, templist,
&ha->scsi_retry_queue) {
sp = list_entry(list, srb_t, list);
q = sp->lun_queue;
tq = sp->tgt_queue;
DEBUG3(printk("scsi(%ld): scsi_retry_q: "
"pid=%ld sp=%p, spflags=0x%x, "
"q_flag= 0x%lx,q_state=%d\n",
ha->host_no, sp->cmd->serial_number,
sp, sp->flags, q->q_flag, q->q_state));
/* Was this lun suspended */
if (q->q_state != LUN_STATE_WAIT) {
online_cnt++;
__del_from_scsi_retry_queue(ha, sp);
if (test_bit(TQF_RETRY_CMDS,
&tq->flags)) {
qla2x00_extend_timeout(sp->cmd,
(sp->cmd->timeout_per_command / HZ) - QLA_CMD_TIMER_DELTA);
__add_to_pending_queue(ha, sp);
retry_cmds++;
} else
__add_to_retry_queue(ha, sp);
}
/* Was this command suspended for N secs */
if (sp->delay != 0) {
sp->delay--;
if (sp->delay == 0) {
online_cnt++;
__del_from_scsi_retry_queue(
ha, sp);
__add_to_retry_queue(ha,sp);
}
}
}
spin_unlock_irqrestore(&ha->list_lock, flags);
/* Clear all Target Unsuspended bits */
for (t = 0; t < ha->max_targets; t++) {
if ((tq = ha->otgt[t]) == NULL)
continue;
if (test_bit(TQF_RETRY_CMDS, &tq->flags))
clear_bit(TQF_RETRY_CMDS, &tq->flags);
}
if (retry_cmds)
qla2x00_next(ha);
DEBUG(if (online_cnt > 0))
DEBUG(printk("scsi(%ld): dpc() found scsi reqs to "
"restart= %d\n",
ha->host_no, online_cnt));
}
if (ha->flags.mbox_busy) {
if (!list_empty(&ha->done_queue))
qla2x00_done(ha);
ha->dpc_active = 0;
continue;
}
if (test_and_clear_bit(ISP_ABORT_NEEDED, &ha->dpc_flags)) {
DEBUG(printk("scsi(%ld): dpc: sched "
"qla2x00_abort_isp ha = %p\n",
ha->host_no, ha));
if (!(test_and_set_bit(ABORT_ISP_ACTIVE,
&ha->dpc_flags))) {
if (qla2x00_abort_isp(ha)) {
/* failed. retry later */
set_bit(ISP_ABORT_NEEDED,
&ha->dpc_flags);
}
clear_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
}
DEBUG(printk("scsi(%ld): dpc: qla2x00_abort_isp end\n",
ha->host_no));
}
if (test_and_clear_bit(RESET_MARKER_NEEDED, &ha->dpc_flags) &&
(!(test_and_set_bit(RESET_ACTIVE, &ha->dpc_flags)))) {
DEBUG(printk("scsi(%ld): qla2x00_reset_marker()\n",
ha->host_no));
qla2x00_rst_aen(ha);
clear_bit(RESET_ACTIVE, &ha->dpc_flags);
}
/* Retry each device up to login retry count */
if ((test_and_clear_bit(RELOGIN_NEEDED, &ha->dpc_flags)) &&
!test_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags) &&
atomic_read(&ha->loop_state) != LOOP_DOWN) {
DEBUG(printk("scsi(%ld): qla2x00_port_login()\n",
ha->host_no));
next_loopid = 0;
list_for_each_entry(fcport, &ha->fcports, list) {
if (fcport->port_type != FCT_TARGET)
continue;
/*
* If the port is not ONLINE then try to login
* to it if we haven't run out of retries.
*/
if (atomic_read(&fcport->state) != FCS_ONLINE &&
fcport->login_retry) {
fcport->login_retry--;
if (fcport->flags & FCF_FABRIC_DEVICE) {
if (fcport->flags &
FCF_TAPE_PRESENT)
qla2x00_fabric_logout(
ha,
fcport->loop_id);
status = qla2x00_fabric_login(
ha, fcport, &next_loopid);
} else
status =
qla2x00_local_device_login(
ha, fcport->loop_id);
if (status == QLA_SUCCESS) {
fcport->old_loop_id = fcport->loop_id;
DEBUG(printk("scsi(%ld): port login OK: logged in ID 0x%x\n",
ha->host_no, fcport->loop_id));
fcport->port_login_retry_count =
ha->port_down_retry_count * PORT_RETRY_TIME;
atomic_set(&fcport->state, FCS_ONLINE);
atomic_set(&fcport->port_down_timer,
ha->port_down_retry_count * PORT_RETRY_TIME);
fcport->login_retry = 0;
} else if (status == 1) {
set_bit(RELOGIN_NEEDED, &ha->dpc_flags);
/* retry the login again */
DEBUG(printk("scsi(%ld): Retrying %d login again loop_id 0x%x\n",
ha->host_no,
fcport->login_retry, fcport->loop_id));
} else {
fcport->login_retry = 0;
}
}
if (test_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags))
break;
}
DEBUG(printk("scsi(%ld): qla2x00_port_login - end\n",
ha->host_no));
}
if ((test_bit(LOGIN_RETRY_NEEDED, &ha->dpc_flags)) &&
atomic_read(&ha->loop_state) != LOOP_DOWN) {
clear_bit(LOGIN_RETRY_NEEDED, &ha->dpc_flags);
DEBUG(printk("scsi(%ld): qla2x00_login_retry()\n",
ha->host_no));
set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
DEBUG(printk("scsi(%ld): qla2x00_login_retry - end\n",
ha->host_no));
}
if (test_and_clear_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags)) {
DEBUG(printk("scsi(%ld): qla2x00_loop_resync()\n",
ha->host_no));
if (!(test_and_set_bit(LOOP_RESYNC_ACTIVE,
&ha->dpc_flags))) {
qla2x00_loop_resync(ha);
clear_bit(LOOP_RESYNC_ACTIVE, &ha->dpc_flags);
}
DEBUG(printk("scsi(%ld): qla2x00_loop_resync - end\n",
ha->host_no));
}
if (test_bit(RESTART_QUEUES_NEEDED, &ha->dpc_flags)) {
DEBUG(printk("scsi(%ld): qla2x00_restart_queues()\n",
ha->host_no));
qla2x00_restart_queues(ha, 0);
DEBUG(printk("scsi(%ld): qla2x00_restart_queues - end\n",
ha->host_no));
}
if (test_bit(ABORT_QUEUES_NEEDED, &ha->dpc_flags)) {
DEBUG(printk("scsi(%ld): qla2x00_abort_queues()\n",
ha->host_no));
qla2x00_abort_queues(ha, 0);
DEBUG(printk("scsi(%ld): qla2x00_abort_queues - end\n",
ha->host_no));
}
if (test_and_clear_bit(FCPORT_RESCAN_NEEDED, &ha->dpc_flags)) {
DEBUG(printk("scsi(%ld): Rescan flagged fcports...\n",
ha->host_no));
qla2x00_rescan_fcports(ha);
DEBUG(printk("scsi(%ld): Rescan flagged fcports..."
"end.\n",
ha->host_no));
}
if (!ha->interrupts_on)
qla2x00_enable_intrs(ha);
if (!list_empty(&ha->done_queue))
qla2x00_done(ha);
ha->dpc_active = 0;
} /* End of while(1) */
DEBUG(printk("scsi(%ld): DPC handler exiting\n", ha->host_no));
/*
* Make sure that nobody tries to wake us up again.
*/
ha->dpc_wait = NULL;
ha->dpc_active = 0;
complete_and_exit(&ha->dpc_exited, 0);
}
/*
* qla2x00_abort_queues
* Abort all commands on queues on device
*
* Input:
* ha = adapter block pointer.
*
* Context:
* Interrupt context.
*/
void
qla2x00_abort_queues(scsi_qla_host_t *ha, uint8_t doneqflg)
{
srb_t *sp;
struct list_head *list, *temp;
unsigned long flags;
clear_bit(ABORT_QUEUES_NEEDED, &ha->dpc_flags);
/* Return all commands device queues. */
spin_lock_irqsave(&ha->list_lock,flags);
list_for_each_safe(list, temp, &ha->pending_queue) {
sp = list_entry(list, srb_t, list);
if (sp->flags & SRB_ABORTED)
continue;
/* Remove srb from LUN queue. */
__del_from_pending_queue(ha, sp);
/* Set ending status. */
sp->cmd->result = DID_BUS_BUSY << 16;
__add_to_done_queue(ha, sp);
}
spin_unlock_irqrestore(&ha->list_lock, flags);
}
/*
* qla2x00_rst_aen
* Processes asynchronous reset.
*
* Input:
* ha = adapter block pointer.
*/
static void
qla2x00_rst_aen(scsi_qla_host_t *ha)
{
if (ha->flags.online && !ha->flags.reset_active &&
!atomic_read(&ha->loop_down_timer) &&
!(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags))) {
do {
clear_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
/*
* Issue marker command only when we are going to start
* the I/O.
*/
ha->marker_needed = 1;
} while (!atomic_read(&ha->loop_down_timer) &&
(test_bit(RESET_MARKER_NEEDED, &ha->dpc_flags)));
}
}
/*
* This routine will allocate SP from the free queue
* input:
* scsi_qla_host_t *
* output:
* srb_t * or NULL
*/
static srb_t *
qla2x00_get_new_sp(scsi_qla_host_t *ha)
{
srb_t *sp;
sp = mempool_alloc(ha->srb_mempool, GFP_ATOMIC);
if (sp)
atomic_set(&sp->ref_count, 1);
return (sp);
}
/**************************************************************************
* qla2x00_timer
*
* Description:
* One second timer
*
* Context: Interrupt
***************************************************************************/
static void
qla2x00_timer(scsi_qla_host_t *ha)
{
int t,l;
unsigned long cpu_flags = 0;
fc_port_t *fcport;
os_lun_t *lq;
os_tgt_t *tq;
int start_dpc = 0;
int index;
srb_t *sp;
/*
* We try and restart any request in the retry queue every second.
*/
if (!list_empty(&ha->retry_queue)) {
set_bit(PORT_RESTART_NEEDED, &ha->dpc_flags);
start_dpc++;
}
/*
* We try and restart any request in the scsi_retry queue every second.
*/
if (!list_empty(&ha->scsi_retry_queue)) {
set_bit(SCSI_RESTART_NEEDED, &ha->dpc_flags);
start_dpc++;
}
/*
* Ports - Port down timer.
*
* Whenever, a port is in the LOST state we start decrementing its port
* down timer every second until it reaches zero. Once it reaches zero
* the port it marked DEAD.
*/
t = 0;
list_for_each_entry(fcport, &ha->fcports, list) {
if (fcport->port_type != FCT_TARGET)
continue;
if (atomic_read(&fcport->state) == FCS_DEVICE_LOST) {
if (atomic_read(&fcport->port_down_timer) == 0)
continue;
if (atomic_dec_and_test(&fcport->port_down_timer) != 0)
atomic_set(&fcport->state, FCS_DEVICE_DEAD);
DEBUG(printk("scsi(%ld): fcport-%d - port retry count: "
"%d remainning\n",
ha->host_no,
t, atomic_read(&fcport->port_down_timer)));
}
t++;
} /* End of for fcport */
/*
* LUNS - lun suspend timer.
*
* Whenever, a lun is suspended the timer starts decrementing its
* suspend timer every second until it reaches zero. Once it reaches
* zero the lun retry count is decremented.
*/
/*
* FIXME(dg) - Need to convert this linear search of luns into a search
* of a list of suspended luns.
*/
for (t = 0; t < ha->max_targets; t++) {
if ((tq = ha->otgt[t]) == NULL)
continue;
for (l = 0; l < ha->max_luns; l++) {
if ((lq = (os_lun_t *) tq->olun[l]) == NULL)
continue;
spin_lock_irqsave(&lq->q_lock, cpu_flags);
if (lq->q_state == LUN_STATE_WAIT &&
atomic_read(&lq->q_timer) != 0) {
if (atomic_dec_and_test(&lq->q_timer) != 0) {
/*
* A delay should immediately
* transition to a READY state
*/
if (test_and_clear_bit(LUN_EXEC_DELAYED,
&lq->q_flag)) {
lq->q_state = LUN_STATE_READY;
}
else {
lq->q_count++;
if (lq->q_count == lq->q_max)
lq->q_state =
LUN_STATE_TIMEOUT;
else
lq->q_state =
LUN_STATE_RUN;
}
}
DEBUG3(printk("scsi(%ld): lun%d - timer %d, "
"count=%d, max=%d, state=%d\n",
ha->host_no,
l,
atomic_read(&lq->q_timer),
lq->q_count, lq->q_max, lq->q_state));
}
spin_unlock_irqrestore(&lq->q_lock, cpu_flags);
} /* End of for luns */
} /* End of for targets */
/* Loop down handler. */
if (atomic_read(&ha->loop_down_timer) > 0 &&
!(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags)) && ha->flags.online) {
if (atomic_read(&ha->loop_down_timer) ==
ha->loop_down_abort_time) {
DEBUG(printk("scsi(%ld): Loop Down - aborting the "
"queues before time expire\n",
ha->host_no));
if (!IS_QLA2100(ha) && ha->link_down_timeout)
atomic_set(&ha->loop_state, LOOP_DEAD);
/* Schedule an ISP abort to return any tape commands. */
spin_lock_irqsave(&ha->hardware_lock, cpu_flags);
for (index = 1; index < MAX_OUTSTANDING_COMMANDS;
index++) {
sp = ha->outstanding_cmds[index];
if (!sp)
continue;
if (!(sp->fclun->fcport->flags &
FCF_TAPE_PRESENT))
continue;
set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
break;
}
spin_unlock_irqrestore(&ha->hardware_lock, cpu_flags);
set_bit(ABORT_QUEUES_NEEDED, &ha->dpc_flags);
start_dpc++;
}
/* if the loop has been down for 4 minutes, reinit adapter */
if (atomic_dec_and_test(&ha->loop_down_timer) != 0) {
DEBUG(printk("scsi(%ld): Loop down exceed 4 mins - "
"restarting queues.\n",
ha->host_no));
set_bit(RESTART_QUEUES_NEEDED, &ha->dpc_flags);
start_dpc++;
if (!(ha->device_flags & DFLG_NO_CABLE)) {
DEBUG(printk("scsi(%ld): Loop down - "
"aborting ISP.\n",
ha->host_no));
qla_printk(KERN_WARNING, ha,
"Loop down - aborting ISP.\n");
set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
}
}
DEBUG3(printk("scsi(%ld): Loop Down - seconds remainning %d\n",
ha->host_no,
atomic_read(&ha->loop_down_timer)));
}
/*
* Done Q Handler -- dgFIXME This handler will kick off doneq if we
* haven't process it in 2 seconds.
*/
if (!list_empty(&ha->done_queue))
qla2x00_done(ha);
/* Schedule the DPC routine if needed */
if ((test_bit(ISP_ABORT_NEEDED, &ha->dpc_flags) ||
test_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags) ||
start_dpc ||
test_bit(LOGIN_RETRY_NEEDED, &ha->dpc_flags) ||
test_bit(RELOGIN_NEEDED, &ha->dpc_flags)) &&
ha->dpc_wait && !ha->dpc_active) {
up(ha->dpc_wait);
}
qla2x00_restart_timer(ha, WATCH_INTERVAL);
}
/*
* qla2x00_extend_timeout
* This routine will extend the timeout to the specified value.
*
* Input:
* cmd = SCSI command structure
*
* Returns:
* None.
*/
void
qla2x00_extend_timeout(struct scsi_cmnd *cmd, int timeout)
{
srb_t *sp = (srb_t *) CMD_SP(cmd);
u_long our_jiffies = (timeout * HZ) + jiffies;
sp->ext_history= 0;
sp->e_start = jiffies;
if (cmd->eh_timeout.function) {
mod_timer(&cmd->eh_timeout,our_jiffies);
sp->ext_history |= 1;
}
if (sp->timer.function != NULL) {
/*
* Our internal timer should timeout before the midlayer has a
* chance begin the abort process
*/
mod_timer(&sp->timer,our_jiffies - (QLA_CMD_TIMER_DELTA * HZ));
sp->ext_history |= 2;
}
}
/**************************************************************************
* qla2x00_cmd_timeout
*
* Description:
* Handles the command if it times out in any state.
*
* Input:
* sp - pointer to validate
*
* Returns:
* None.
* Note:Need to add the support for if( sp->state == SRB_FAILOVER_STATE).
**************************************************************************/
void
qla2x00_cmd_timeout(srb_t *sp)
{
int t, l;
int processed;
scsi_qla_host_t *vis_ha, *dest_ha;
struct scsi_cmnd *cmd;
unsigned long flags, cpu_flags;
fc_port_t *fcport;
cmd = sp->cmd;
vis_ha = (scsi_qla_host_t *)cmd->device->host->hostdata;
DEBUG3(printk("cmd_timeout: Entering sp->state = %x\n", sp->state));
t = cmd->device->id;
l = cmd->device->lun;
fcport = sp->fclun->fcport;
dest_ha = sp->ha;
/*
* If IO is found either in retry Queue
* OR in Lun Queue
* Return this IO back to host
*/
spin_lock_irqsave(&vis_ha->list_lock, flags);
processed = 0;
if (sp->state == SRB_PENDING_STATE) {
__del_from_pending_queue(vis_ha, sp);
DEBUG2(printk("scsi(%ld): Found in Pending queue pid %ld, "
"State = %x., fcport state=%d sjiffs=%lx njiffs=%lx\n",
vis_ha->host_no, cmd->serial_number, sp->state,
atomic_read(&fcport->state), sp->r_start, jiffies));
/*
* If FC_DEVICE is marked as dead return the cmd with
* DID_NO_CONNECT status. Otherwise set the host_byte to
* DID_BUS_BUSY to let the OS retry this cmd.
*/
if (atomic_read(&fcport->state) == FCS_DEVICE_DEAD ||
atomic_read(&fcport->ha->loop_state) == LOOP_DEAD) {
cmd->result = DID_NO_CONNECT << 16;
if (atomic_read(&fcport->ha->loop_state) == LOOP_DOWN)
sp->err_id = SRB_ERR_LOOP;
else
sp->err_id = SRB_ERR_PORT;
} else {
cmd->result = DID_BUS_BUSY << 16;
}
__add_to_done_queue(vis_ha, sp);
processed++;
}
spin_unlock_irqrestore(&vis_ha->list_lock, flags);
if (processed) {
qla2x00_done(vis_ha);
return;
}
spin_lock_irqsave(&dest_ha->list_lock, flags);
if ((sp->state == SRB_RETRY_STATE) ||
(sp->state == SRB_SCSI_RETRY_STATE)) {
DEBUG2(printk("scsi(%ld): Found in (Scsi) Retry queue or "
"failover Q pid %ld, State = %x., fcport state=%d "
"jiffies=%lx retried=%d\n",
dest_ha->host_no, cmd->serial_number, sp->state,
atomic_read(&fcport->state), jiffies, cmd->retries));
if ((sp->state == SRB_RETRY_STATE)) {
__del_from_retry_queue(dest_ha, sp);
} else if ((sp->state == SRB_SCSI_RETRY_STATE)) {
__del_from_scsi_retry_queue(dest_ha, sp);
}
/*
* If FC_DEVICE is marked as dead return the cmd with
* DID_NO_CONNECT status. Otherwise set the host_byte to
* DID_BUS_BUSY to let the OS retry this cmd.
*/
if ((atomic_read(&fcport->state) == FCS_DEVICE_DEAD) ||
atomic_read(&dest_ha->loop_state) == LOOP_DEAD) {
qla2x00_extend_timeout(cmd, EXTEND_CMD_TIMEOUT);
cmd->result = DID_NO_CONNECT << 16;
if (atomic_read(&dest_ha->loop_state) == LOOP_DOWN)
sp->err_id = SRB_ERR_LOOP;
else
sp->err_id = SRB_ERR_PORT;
} else {
cmd->result = DID_BUS_BUSY << 16;
}
__add_to_done_queue(dest_ha, sp);
processed++;
}
spin_unlock_irqrestore(&dest_ha->list_lock, flags);
if (processed) {
qla2x00_done(dest_ha);
return;
}
spin_lock_irqsave(&dest_ha->list_lock, cpu_flags);
if (sp->state == SRB_DONE_STATE) {
/* IO in done_q -- leave it */
DEBUG(printk("scsi(%ld): Found in Done queue pid %ld sp=%p.\n",
dest_ha->host_no, cmd->serial_number, sp));
} else if (sp->state == SRB_SUSPENDED_STATE) {
DEBUG(printk("scsi(%ld): Found SP %p in suspended state "
"- pid %ld:\n",
dest_ha->host_no, sp, cmd->serial_number));
DEBUG(qla2x00_dump_buffer((uint8_t *)sp, sizeof(srb_t));)
} else if (sp->state == SRB_ACTIVE_STATE) {
/*
* IO is with ISP find the command in our active list.
*/
spin_unlock_irqrestore(&dest_ha->list_lock, cpu_flags);
spin_lock_irqsave(&dest_ha->hardware_lock, flags);
if (sp == dest_ha->outstanding_cmds[
(unsigned long)sp->cmd->host_scribble]) {
DEBUG(printk("cmd_timeout: Found in ISP \n"));
if (sp->flags & SRB_TAPE) {
/*
* We cannot allow the midlayer error handler
* to wakeup and begin the abort process.
* Extend the timer so that the firmware can
* properly return the IOCB.
*/
DEBUG(printk("cmd_timeout: Extending timeout "
"of FCP2 tape command!\n"));
qla2x00_extend_timeout(sp->cmd,
EXTEND_CMD_TIMEOUT);
}
sp->state = SRB_ACTIVE_TIMEOUT_STATE;
spin_unlock_irqrestore(&dest_ha->hardware_lock, flags);
} else {
spin_unlock_irqrestore(&dest_ha->hardware_lock, flags);
printk(KERN_INFO
"qla_cmd_timeout: State indicates it is with "
"ISP, But not in active array\n");
}
spin_lock_irqsave(&dest_ha->list_lock, cpu_flags);
} else if (sp->state == SRB_ACTIVE_TIMEOUT_STATE) {
DEBUG(printk("qla2100%ld: Found in Active timeout state"
"pid %ld, State = %x., \n",
dest_ha->host_no,
sp->cmd->serial_number, sp->state);)
} else {
/* EMPTY */
DEBUG2(printk("cmd_timeout%ld: LOST command state = "
"0x%x, sp=%p\n",
vis_ha->host_no, sp->state,sp);)
qla_printk(KERN_INFO, vis_ha,
"cmd_timeout: LOST command state = 0x%x\n", sp->state);
}
spin_unlock_irqrestore(&dest_ha->list_lock, cpu_flags);
DEBUG3(printk("cmd_timeout: Leaving\n");)
}
/**************************************************************************
* qla2x00_done
* Process completed commands.
*
* Input:
* old_ha = adapter block pointer.
*
**************************************************************************/
void
qla2x00_done(scsi_qla_host_t *old_ha)
{
os_lun_t *lq;
struct scsi_cmnd *cmd;
unsigned long flags = 0;
scsi_qla_host_t *ha;
scsi_qla_host_t *vis_ha;
int send_marker_once = 0;
srb_t *sp, *sptemp;
LIST_HEAD(local_sp_list);
/*
* Get into local queue such that we do not wind up calling done queue
* tasklet for the same IOs from DPC or any other place.
*/
spin_lock_irqsave(&old_ha->list_lock, flags);
list_splice_init(&old_ha->done_queue, &local_sp_list);
spin_unlock_irqrestore(&old_ha->list_lock, flags);
/*
* All done commands are in the local queue, now do the call back.
*/
list_for_each_entry_safe(sp, sptemp, &local_sp_list, list) {
old_ha->done_q_cnt--;
sp->state = SRB_NO_QUEUE_STATE;
/* remove command from local list */
list_del_init(&sp->list);
cmd = sp->cmd;
if (cmd == NULL)
continue;
vis_ha = (scsi_qla_host_t *)cmd->device->host->hostdata;
lq = sp->lun_queue;
ha = sp->ha;
if (sp->flags & SRB_DMA_VALID) {
sp->flags &= ~SRB_DMA_VALID;
/* Release memory used for this I/O */
if (cmd->use_sg) {
pci_unmap_sg(ha->pdev, cmd->request_buffer,
cmd->use_sg, cmd->sc_data_direction);
} else if (cmd->request_bufflen) {
pci_unmap_page(ha->pdev, sp->dma_handle,
cmd->request_bufflen,
cmd->sc_data_direction);
}
}
switch (host_byte(cmd->result)) {
case DID_OK:
case DID_ERROR:
break;
case DID_RESET:
/*
* Set marker needed, so we don't have to
* send multiple markers
*/
if (!send_marker_once) {
ha->marker_needed = 1;
send_marker_once++;
}
/*
* WORKAROUND
*
* A backdoor device-reset requires different
* error handling. This code differentiates
* between normal error handling and the
* backdoor method.
*
*/
if (ha->host->eh_active != EH_ACTIVE)
cmd->result = DID_BUS_BUSY << 16;
break;
case DID_ABORT:
sp->flags &= ~SRB_ABORT_PENDING;
sp->flags |= SRB_ABORTED;
if (sp->flags & SRB_TIMEOUT)
cmd->result = DID_TIME_OUT << 16;
break;
default:
DEBUG2(printk("scsi(%ld:%d:%d) %s: did_error "
"= %d, comp-scsi= 0x%x-0x%x pid=%ld.\n",
vis_ha->host_no,
cmd->device->id, cmd->device->lun,
__func__,
host_byte(cmd->result),
CMD_COMPL_STATUS(cmd),
CMD_SCSI_STATUS(cmd), cmd->serial_number));
break;
}
/*
* Call the mid-level driver interrupt handler -- via sp_put()
*/
sp_put(ha, sp);
} /* end of while */
}
/*
* qla2x00_process_response_queue_in_zio_mode
* Process response queue completion as fast as possible
* to achieve Zero Interrupt Opertions-ZIO
*
* Input:
* ha = adapter block pointer.
*
* Context:
* Kernel context.
*/
static inline void
qla2x00_process_response_queue_in_zio_mode(scsi_qla_host_t *ha)
{
unsigned long flags;
/* Check for unprocessed commands in response queue. */
if (!ha->flags.process_response_queue)
return;
if (!ha->flags.online)
return;
if (ha->response_ring_ptr->signature == RESPONSE_PROCESSED)
return;
spin_lock_irqsave(&ha->hardware_lock,flags);
qla2x00_process_response_queue(ha);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
}
/*
* qla2x00_next
* Retrieve and process next job in the LUN queue.
*
* Input:
* tq = SCSI target queue pointer.
* lq = SCSI LUN queue pointer.
* TGT_LOCK must be already obtained.
*
* Output:
* Releases TGT_LOCK upon exit.
*
* Context:
* Kernel/Interrupt context.
*
* Note: This routine will always try to start I/O from visible HBA.
*/
void
qla2x00_next(scsi_qla_host_t *vis_ha)
{
int rval;
unsigned long flags;
scsi_qla_host_t *dest_ha;
fc_port_t *fcport;
srb_t *sp, *sptemp;
LIST_HEAD(local_sp_list);
dest_ha = NULL;
spin_lock_irqsave(&vis_ha->list_lock, flags);
list_splice_init(&vis_ha->pending_queue, &local_sp_list);
vis_ha->qthreads = 0;
spin_unlock_irqrestore(&vis_ha->list_lock, flags);
list_for_each_entry_safe(sp, sptemp, &local_sp_list, list) {
list_del_init(&sp->list);
sp->state = SRB_NO_QUEUE_STATE;
fcport = sp->fclun->fcport;
dest_ha = fcport->ha;
/* If device is dead then send request back to OS */
if (atomic_read(&fcport->state) == FCS_DEVICE_DEAD) {
sp->cmd->result = DID_NO_CONNECT << 16;
if (atomic_read(&dest_ha->loop_state) == LOOP_DOWN)
sp->err_id = SRB_ERR_LOOP;
else
sp->err_id = SRB_ERR_PORT;
DEBUG3(printk("scsi(%ld): loop/port is down - pid=%ld, "
"sp=%p err_id=%d loopid=0x%x queued to dest HBA "
"scsi%ld.\n", dest_ha->host_no,
sp->cmd->serial_number, sp, sp->err_id,
fcport->loop_id, dest_ha->host_no));
/*
* Initiate a failover - done routine will initiate.
*/
add_to_done_queue(vis_ha, sp);
continue;
}
/*
* SCSI Kluge: Whenever, we need to wait for an event such as
* loop down (i.e. loop_down_timer ) or port down (i.e. LUN
* request qeueue is suspended) then we will recycle new
* commands back to the SCSI layer. We do this because this is
* normally a temporary condition and we don't want the
* mid-level scsi.c driver to get upset and start aborting
* commands. The timeout value is extracted from the command
* minus 1-second and put on a retry queue (watchdog). Once the
* command timeout it is returned to the mid-level with a BUSY
* status, so the mid-level will retry it. This process
* continues until the LOOP DOWN time expires or the condition
* goes away.
*/
if (!(sp->flags & (SRB_IOCTL | SRB_TAPE)) &&
(atomic_read(&fcport->state) != FCS_ONLINE ||
test_bit(ABORT_ISP_ACTIVE, &dest_ha->dpc_flags) ||
atomic_read(&dest_ha->loop_state) != LOOP_READY)) {
DEBUG3(printk("scsi(%ld): pid=%ld port=0x%x state=%d "
"loop state=%d, loop counter=0x%x "
"dpc_flags=0x%lx\n", sp->cmd->serial_number,
dest_ha->host_no, fcport->loop_id,
atomic_read(&fcport->state),
atomic_read(&dest_ha->loop_state),
atomic_read(&dest_ha->loop_down_timer),
dest_ha->dpc_flags));
qla2x00_extend_timeout(sp->cmd, EXTEND_CMD_TIMEOUT);
add_to_retry_queue(vis_ha, sp);
continue;
}
/*
* If this request's lun is suspended then put the request on
* the scsi_retry queue.
*/
if (!(sp->flags & (SRB_IOCTL | SRB_TAPE)) &&
sp->lun_queue->q_state == LUN_STATE_WAIT) {
DEBUG3(printk("scsi(%ld): lun wait state - pid=%ld, "
"opcode=%d, allowed=%d, retries=%d\n",
dest_ha->host_no,
sp->cmd->serial_number,
sp->cmd->cmnd[0],
sp->cmd->allowed,
sp->cmd->retries));
add_to_scsi_retry_queue(vis_ha, sp);
continue;
}
sp->lun_queue->io_cnt++;
rval = qla2x00_start_scsi(sp);
if (rval != QLA_SUCCESS) {
/* Place request back on top of device queue */
/* add to the top of queue */
add_to_pending_queue_head(vis_ha, sp);
sp->lun_queue->io_cnt--;
}
}
if (!IS_QLA2100(vis_ha) && !IS_QLA2200(vis_ha)) {
/* Process response_queue if ZIO support is enabled*/
qla2x00_process_response_queue_in_zio_mode(vis_ha);
}
}
/* XXX(hch): crude hack to emulate a down_timeout() */
int
qla2x00_down_timeout(struct semaphore *sema, unsigned long timeout)
{
const unsigned int step = HZ/10;
do {
if (!down_trylock(sema))
return 0;
set_current_state(TASK_INTERRUPTIBLE);
if (schedule_timeout(step))
break;
} while ((timeout -= step) > 0);
return -ETIMEDOUT;
}
static void
qla2xxx_get_port_id(struct scsi_target *starget)
{
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
scsi_qla_host_t *ha = to_qla_host(shost);
struct fc_port *fc;
list_for_each_entry(fc, &ha->fcports, list) {
if (fc->os_target_id == starget->id) {
fc_starget_port_id(starget) = fc->d_id.b.domain << 16 |
fc->d_id.b.area << 8 |
fc->d_id.b.al_pa;
return;
}
}
fc_starget_port_id(starget) = -1;
}
static void
qla2xxx_get_port_name(struct scsi_target *starget)
{
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
scsi_qla_host_t *ha = to_qla_host(shost);
struct fc_port *fc;
list_for_each_entry(fc, &ha->fcports, list) {
if (fc->os_target_id == starget->id) {
fc_starget_port_name(starget) =
__be64_to_cpu(*(uint64_t *)fc->port_name);
return;
}
}
fc_starget_port_name(starget) = -1;
}
static void
qla2xxx_get_node_name(struct scsi_target *starget)
{
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
scsi_qla_host_t *ha = to_qla_host(shost);
struct fc_port *fc;
list_for_each_entry(fc, &ha->fcports, list) {
if (fc->os_target_id == starget->id) {
fc_starget_node_name(starget) =
__be64_to_cpu(*(uint64_t *)fc->node_name);
return;
}
}
fc_starget_node_name(starget) = -1;
}
static struct fc_function_template qla2xxx_transport_functions = {
.get_starget_port_id = qla2xxx_get_port_id,
.show_starget_port_id = 1,
.get_starget_port_name = qla2xxx_get_port_name,
.show_starget_port_name = 1,
.get_starget_node_name = qla2xxx_get_node_name,
.show_starget_node_name = 1,
};
/**
* qla2x00_module_init - Module initialization.
**/
static int __init
qla2x00_module_init(void)
{
/* Allocate cache for SRBs. */
sprintf(srb_cachep_name, "qla2xxx_srbs");
srb_cachep = kmem_cache_create(srb_cachep_name, sizeof(srb_t), 0,
SLAB_HWCACHE_ALIGN, NULL, NULL);
if (srb_cachep == NULL) {
printk(KERN_ERR
"qla2xxx: Unable to allocate SRB cache...Failing load!\n");
return -ENOMEM;
}
/* Derive version string. */
strcpy(qla2x00_version_str, QLA2XXX_VERSION);
#if DEBUG_QLA2100
strcat(qla2x00_version_str, "-debug");
#endif
qla2xxx_transport_template = fc_attach_transport(&qla2xxx_transport_functions);
if (!qla2xxx_transport_template)
return -ENODEV;
printk(KERN_INFO "QLogic Fibre Channel HBA Driver\n");
return 0;
}
/**
* qla2x00_module_exit - Module cleanup.
**/
static void __exit
qla2x00_module_exit(void)
{
/* Free SRBs cache. */
if (srb_cachep != NULL) {
if (kmem_cache_destroy(srb_cachep) != 0) {
printk(KERN_ERR
"qla2xxx: Unable to free SRB cache...Memory pools "
"still active?\n");
}
srb_cachep = NULL;
}
fc_release_transport(qla2xxx_transport_template);
}
module_init(qla2x00_module_init);
module_exit(qla2x00_module_exit);
MODULE_AUTHOR("QLogic Corporation");
MODULE_DESCRIPTION("QLogic Fibre Channel HBA Driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(QLA2XXX_VERSION);
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