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Location: vmkdrivers/vmkdrivers/src_9/drivers/scsi/qla4xxx/ql4im_os.c
bd21c8aa7237
9.2 KiB
text/x-csrc
ESXi-6.0.0b
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* QLogic iSCSI HBA Driver
* Copyright (c) 2003-2006 QLogic Corporation
*
* See LICENSE.qla4xxx for copyright and licensing details.
*/
/******************************************************************************
* Please see release.txt for revision history. *
* *
******************************************************************************
* Function Table of Contents:
****************************************************************************/
#include <linux/version.h>
#include <linux/vmalloc.h>
#include <linux/spinlock.h>
#include <linux/module.h>
#include <linux/timer.h>
#include <linux/klist.h>
#include <asm/semaphore.h>
#include "ql4_def.h"
#include "ql4im_def.h"
/* Restrict compilation to 2.6.18 or greater */
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18)
#error "This module does not support kernel versions earlier than 2.6.18"
#endif
#define QL4_MODULE_NAME "qla4xxx"
extern struct klist *qla4xxx_hostlist_ptr;
static struct klist *ha_list;
static int hba_count = 0;
/*unsigned dbg_level = (QL_DBG_1 | QL_DBG_2 | QL_DBG_4 | QL_DBG_11 | QL_DBG_12);*/
unsigned dbg_level = 0;
static struct hba_ioctl *hba[EXT_DEF_MAX_HBAS];
static struct class *apidev_class = NULL;
static int apidev_major;
extern char *qla4xxx_version_str;
uint8_t drvr_major = 5;
uint8_t drvr_minor = 0;
uint8_t drvr_patch = 5;
uint8_t drvr_beta = 9;
char drvr_ver[40];
#define DEFAULT_VER "5.00.05b9-k"
static int
apidev_ioctl(struct inode *inode, struct file *fp, unsigned int cmd,
unsigned long arg)
{
return (qla4xxx_ioctl((int)cmd, (void*)arg));
}
#ifdef CONFIG_COMPAT
static long
qla4xxx_ioctl32(struct file *file, unsigned int cmd, unsigned long arg)
{
int rval = -ENOIOCTLCMD;
lock_kernel();
rval = qla4xxx_ioctl((int)cmd, (void*)arg);
unlock_kernel();
return rval;
}
#endif
static struct file_operations apidev_fops = {
.owner = THIS_MODULE,
.ioctl = apidev_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = qla4xxx_ioctl32,
#endif
};
static char *getval(char *ver, uint8_t *val)
{
*val = 0;
while (ver &&(*ver != '\0')&&(*ver != '.')&&(*ver != '-')&&
(*ver >= '0')&&(*ver <= '9')) {
*val = *val * 10 + *ver - '0';
ver++;
}
return ver;
}
struct hba_ioctl *ql4im_get_adapter_handle(uint16_t instance)
{
if (instance >= EXT_DEF_MAX_HBAS)
return NULL;
return hba[instance];
}
static int ql4_ioctl_alloc(int hba_idx, struct klist_node *node)
{
struct hba_ioctl *haioctl;
haioctl = kzalloc(sizeof(struct hba_ioctl), GFP_ATOMIC);
if (haioctl == NULL)
return -ENOMEM;
memset(haioctl, 0, sizeof(struct hba_ioctl));
hba[hba_idx] = haioctl;
haioctl->ha = (struct scsi_qla_host *)node;
haioctl->dma_v = pci_alloc_consistent(haioctl->ha->pdev,
QL_DMA_BUF_SIZE,
&haioctl->dma_p);
if (haioctl->dma_v == NULL) {
printk(KERN_WARNING "qisitoctl: %s: %d: pcialloc failed\n",
__func__, hba_idx);
kfree(haioctl);
hba[hba_idx] = NULL;
return -ENOMEM;
}
#ifdef __VMKLNX__
init_MUTEX(&haioctl->ioctl_sem);
#else
mutex_init(&haioctl->ioctl_sem);
#endif
haioctl->dma_len = QL_DMA_BUF_SIZE;
return 0;
}
static void ql4_ioctl_free(void)
{
int i;
struct hba_ioctl *haioctl;
for (i = 0; i < EXT_DEF_MAX_HBAS; i++) {
if ((haioctl = hba[i]) != NULL) {
pci_free_consistent(haioctl->ha->pdev,
PAGE_SIZE,
haioctl->dma_v,
haioctl->dma_p);
kfree(haioctl);
}
hba[i] = NULL;
}
}
#ifndef __VMKLNX__
uint32_t
ql4im_get_hba_count(void)
{
return(hba_count);
}
static void get_drvr_version(void)
{
char *ver;
ver = ((char *)symbol_get(qla4xxx_version_str));
if (ver == NULL) {
strcpy(drvr_ver, DEFAULT_VER);
printk(KERN_INFO "symbol_get(qla4xxx_version_str) failed\n");
return;
}
strcpy(drvr_ver, ver);
symbol_put(qla4xxx_version_str);
ver = drvr_ver;
ver = getval(ver, &drvr_major);
if (ver && *ver == '.') ver++;
ver = getval(ver, &drvr_minor);
if (ver && *ver == '.') ver++;
ver = getval(ver, &drvr_patch);
drvr_beta = 0;
if (ver && *ver == 'b') {
ver++;
ver = getval(ver, &drvr_beta);
}
printk(KERN_INFO "drvr_ver %s major %d minor %d patch %d beta %d\n",
drvr_ver, drvr_major, drvr_minor, drvr_patch, drvr_beta);
}
static int ql4_ioctl_init(void)
{
ENTER(__func__);
apidev_class = class_create(THIS_MODULE, QL4_MODULE_NAME);
if (IS_ERR(apidev_class)) {
DEBUG2(printk("qisioctl: %s: Unable to sysfs class\n", __func__));
apidev_class = NULL;
return 1;
}
DEBUG4(printk("qisioctl: %s: apidev_class=%p.\n", __func__, apidev_class));
apidev_major = register_chrdev(0, QL4_MODULE_NAME, &apidev_fops);
if (apidev_major < 0) {
DEBUG2(printk("qisioctl: %s: Unable to register CHAR device (%d)\n",
__func__, apidev_major));
class_destroy(apidev_class);
apidev_class = NULL;
return apidev_major;
}
DEBUG4(printk("qisioctl: %s: apidev_major=%d.\n", __func__, apidev_major));
class_device_create(apidev_class, NULL, MKDEV(apidev_major, 0), NULL,
QL4_MODULE_NAME);
LEAVE(__func__);
return 0;
}
static void ql4_ioctl_exit(void)
{
ENTER(__func__);
if (!apidev_class)
return;
class_device_destroy(apidev_class, MKDEV(apidev_major, 0));
unregister_chrdev(apidev_major, QL4_MODULE_NAME);
class_destroy(apidev_class);
apidev_class = NULL;
LEAVE(__func__);
}
static int ql4im_init(void)
{
struct klist_node *node;
struct klist **ql4_hl;
struct klist_iter iter;
ENTER( __func__ );
memset(&hba, 0, sizeof (*hba));
ql4_hl = (struct klist **)symbol_get(qla4xxx_hostlist_ptr);
if (ql4_hl == NULL) {
printk("qistioctl: symbol_get failed qla4xxx_hostlist_ptr\n");
return -ENODEV;
}
ha_list = *ql4_hl;
if (ha_list == NULL) {
printk("qistioctl: ha_list == NULL\n");
return -ENODEV;
}
DEBUG1(printk("qisioctl: %s: ha_list %p.\n", __func__, ha_list));
get_drvr_version();
if (ql4_ioctl_init())
return -ENODEV;
klist_iter_init(ha_list, &iter);
DEBUG1(printk("qisioctl: %s: klist_iter_init successful \n", __func__));
while ((node = klist_next(&iter)) != NULL) {
ql4_ioctl_alloc(hba_count, node);
hba_count++;
DEBUG1(printk("qisioctl: %s: node = %p\n", __func__, node));
}
klist_iter_exit(&iter);
LEAVE( __func__ );
printk(KERN_INFO "QLogic iSCSI IOCTL Module ver: %s\n", QL4IM_VERSION);
return 0;
}
static void __exit ql4im_exit(void)
{
ENTER( __func__ );
symbol_put(qla4xxx_hostlist_ptr);
ql4_ioctl_free();
ql4_ioctl_exit();
LEAVE( __func__ );
}
module_init(ql4im_init);
module_exit(ql4im_exit);
MODULE_AUTHOR("QLogic Corporation");
MODULE_DESCRIPTION("QLogic iSCSI Driver IOCTL Module");
MODULE_VERSION(QL4IM_VERSION);
MODULE_LICENSE("GPL");
#else
#include "ql4_version.h"
uint32_t
ql4im_get_hba_count(void)
{
int i;
hba_count = 0;
for (i = 0; i < EXT_DEF_MAX_HBAS; i++)
if (hba[i] != NULL)
hba_count++;
return(hba_count);
}
static void get_drvr_version(void)
{
char *ver = (char *)QLA4XXX_DRIVER_VERSION;
strcpy(drvr_ver, ver);
ver = drvr_ver;
ver = getval(ver, &drvr_major);
if (ver && *ver == '.') ver++;
ver = getval(ver, &drvr_minor);
if (ver && *ver == '.') ver++;
ver = getval(ver, &drvr_patch);
drvr_beta = 0;
if (ver && *ver == 'b') {
ver++;
ver = getval(ver, &drvr_beta);
}
printk(KERN_INFO "qisioctl: %s: ver %s maj %d min %d pat %d beta %d\n",
__func__, drvr_ver, drvr_major, drvr_minor, drvr_patch,
drvr_beta);
}
static int ql4_ioctl_init(void)
{
ENTER(__func__);
apidev_major = register_chrdev(0, QL4_MODULE_NAME, &apidev_fops);
if (apidev_major < 0) {
DEBUG2(printk("qisioctl: %s: Unable to register CHAR device (%d)\n",
__func__, apidev_major));
printk("qisioctl: %s: Unable to register CHAR device (%d)\n",
__func__, apidev_major);
return apidev_major;
}
DEBUG4(printk("qisioctl: %s: apidev_major=%d.\n", __func__, apidev_major));
printk("qisioctl: %s: apidev_major=%d.\n", __func__, apidev_major);
LEAVE(__func__);
return 0;
}
static void ql4_ioctl_exit(void)
{
ENTER(__func__);
unregister_chrdev(apidev_major, QL4_MODULE_NAME);
LEAVE(__func__);
}
int ql4im_mem_alloc(int hba_idx, struct scsi_qla_host *ha)
{
return ql4_ioctl_alloc(hba_idx, (struct klist_node *)ha);
}
void ql4im_mem_free(int hba_idx)
{
struct hba_ioctl *haioctl;
if ((haioctl = hba[hba_idx]) != NULL) {
pci_free_consistent(haioctl->ha->pdev,
PAGE_SIZE,
haioctl->dma_v,
haioctl->dma_p);
kfree(haioctl);
}
hba[hba_idx] = NULL;
}
int ql4im_init(void)
{
int i ;
ENTER( __func__ );
get_drvr_version();
for (i = 0; i < EXT_DEF_MAX_HBAS; i++)
hba[i] = NULL;
if (ql4_ioctl_init())
return -ENODEV;
LEAVE(__func__);
return 0;
}
void ql4im_exit(void)
{
ENTER( __func__ );
ql4_ioctl_exit();
LEAVE( __func__ );
}
/* emulation of down_timeout() */
int
ql4im_down_timeout(struct semaphore *sema, unsigned long timeout)
{
const unsigned int step = 100; /* msecs */
unsigned int iterations = jiffies_to_msecs(timeout)/100;
do {
if (!down_trylock(sema))
return 0;
if (msleep_interruptible(step))
break;
} while (--iterations > 0);
return -ETIMEDOUT;
}
#endif
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