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staging: unisys: added virtpci info entry

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This patch adds the virtpci debugfs directory and the info entry
inside of it.

Signed-off-by: Erik Arfvidson <erik.arfvidson@unisys.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Erik Arfvidson 2014-07-16 16:03:20 -04:00 committed by Greg Kroah-Hartman
parent 39798450a4
commit 0f9e530120
1 changed files with 108 additions and 2 deletions
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110
drivers/staging/unisys/virtpci/virtpci.c
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@ -36,6 +36,7 @@
#include <linux/mod_devicetable.h>
#include <linux/if_ether.h>
#include <linux/version.h>
#include <linux/debugfs.h>
#include "version.h"
#include "guestlinuxdebug.h"
#include "timskmodutils.h"
@ -58,6 +59,11 @@ struct driver_private {
#define BUS_ID(x) dev_name(x)
/* MAX_BUF = 4 busses x ( 32 devices/bus + 1 busline) x 80 characters
* = 10,560 bytes ~ 2^14 = 16,384 bytes
*/
#define MAX_BUF 16384
#include "virtpci.h"
/* this is shorter than using __FILE__ (full path name) in
@ -100,6 +106,12 @@ static int virtpci_device_resume(struct device *dev);
static int virtpci_device_probe(struct device *dev);
static int virtpci_device_remove(struct device *dev);
static ssize_t info_debugfs_read(struct file *file, char __user *buf,
size_t len, loff_t *offset);
static const struct file_operations debugfs_info_fops = {
.read = info_debugfs_read,
};
/*****************************************************/
/* Globals */
@ -140,6 +152,13 @@ static DEFINE_RWLOCK(VpcidevListLock);
/* filled in with info about this driver, wrt it servicing client busses */
static ULTRA_VBUS_DEVICEINFO Bus_DriverInfo;
/*****************************************************/
/* debugfs entries */
/*****************************************************/
/* dentry is used to create the debugfs entry directory
* for virtpci
*/
static struct dentry *virtpci_debugfs_dir;
struct virtpci_busdev {
struct device virtpci_bus_device;
@ -1376,6 +1395,90 @@ void virtpci_unregister_driver(struct virtpci_driver *drv)
}
EXPORT_SYMBOL_GPL(virtpci_unregister_driver);
/*****************************************************/
/* debugfs filesystem functions */
/*****************************************************/
struct print_vbus_info {
int *str_pos;
char *buf;
size_t *len;
};
static int print_vbus(struct device *vbus, void *data)
{
struct print_vbus_info *p = (struct print_vbus_info *)data;
*p->str_pos += scnprintf(p->buf + *p->str_pos, *p->len - *p->str_pos,
"bus_id:%s\n", dev_name(vbus));
return 0;
}
static ssize_t info_debugfs_read(struct file *file, char __user *buf,
size_t len, loff_t *offset)
{
ssize_t bytes_read = 0;
int str_pos = 0;
struct virtpci_dev *tmpvpcidev;
unsigned long flags;
struct print_vbus_info printparam;
char *vbuf;
if (len > MAX_BUF)
len = MAX_BUF;
vbuf = kzalloc(len, GFP_KERNEL);
if (!vbuf)
return -ENOMEM;
str_pos += scnprintf(vbuf + str_pos, len - str_pos,
" Virtual PCI Bus devices\n");
printparam.str_pos = &str_pos;
printparam.buf = vbuf;
printparam.len = &len;
if (bus_for_each_dev(&virtpci_bus_type, NULL,
(void *) &printparam, print_vbus))
LOGERR("Failed to find bus\n");
str_pos += scnprintf(vbuf + str_pos, len - str_pos,
"\n Virtual PCI devices\n");
read_lock_irqsave(&VpcidevListLock, flags);
tmpvpcidev = VpcidevListHead;
while (tmpvpcidev) {
if (tmpvpcidev->devtype == VIRTHBA_TYPE) {
str_pos += scnprintf(vbuf + str_pos, len - str_pos,
"[%d:%d] VHba:%08x:%08x max-config:%d-%d-%d-%d",
tmpvpcidev->busNo, tmpvpcidev->deviceNo,
tmpvpcidev->scsi.wwnn.wwnn1,
tmpvpcidev->scsi.wwnn.wwnn2,
tmpvpcidev->scsi.max.max_channel,
tmpvpcidev->scsi.max.max_id,
tmpvpcidev->scsi.max.max_lun,
tmpvpcidev->scsi.max.cmd_per_lun);
} else {
str_pos += scnprintf(vbuf + str_pos, len - str_pos,
"[%d:%d] VNic:%02x:%02x:%02x:%02x:%02x:%02x num_rcv_bufs:%d mtu:%d",
tmpvpcidev->busNo, tmpvpcidev->deviceNo,
tmpvpcidev->net.mac_addr[0],
tmpvpcidev->net.mac_addr[1],
tmpvpcidev->net.mac_addr[2],
tmpvpcidev->net.mac_addr[3],
tmpvpcidev->net.mac_addr[4],
tmpvpcidev->net.mac_addr[5],
tmpvpcidev->net.num_rcv_bufs,
tmpvpcidev->net.mtu);
}
str_pos += scnprintf(vbuf + str_pos,
len - str_pos, " chanptr:%p\n",
tmpvpcidev->queueinfo.chan);
tmpvpcidev = tmpvpcidev->next;
}
read_unlock_irqrestore(&VpcidevListLock, flags);
str_pos += scnprintf(vbuf + str_pos, len - str_pos, "\n");
bytes_read = simple_read_from_buffer(buf, len, offset, vbuf, str_pos);
kfree(vbuf);
return bytes_read;
}
/*****************************************************/
/* Module Init & Exit functions */
/*****************************************************/
@ -1426,7 +1529,10 @@ static int __init virtpci_mod_init(void)
LOGINF("successfully registered virtpci_ctrlchan_func (0x%p) as callback.\n",
(void *) &virtpci_ctrlchan_func);
/* create debugfs directory and info file inside. */
virtpci_debugfs_dir = debugfs_create_dir("virtpci", NULL);
debugfs_create_file("info", S_IRUSR, virtpci_debugfs_dir,
NULL, &debugfs_info_fops);
LOGINF("Leaving\n");
POSTCODE_LINUX_2(VPCI_CREATE_EXIT_PC, POSTCODE_SEVERITY_INFO);
return 0;
@ -1442,7 +1548,7 @@ static void __exit virtpci_mod_exit(void)
device_unregister(&virtpci_rootbus_device);
bus_unregister(&virtpci_bus_type);
debugfs_remove_recursive(virtpci_debugfs_dir);
LOGINF("Leaving\n");
}