* (C) IBM Corporation 2002-2004
*/
+#define KMSG_COMPONENT "extmem"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/spinlock.h>
#include <asm/cpcmd.h>
#include <asm/setup.h>
-#define DCSS_DEBUG /* Debug messages on/off */
-
-#define DCSS_NAME "extmem"
-#ifdef DCSS_DEBUG
-#define PRINT_DEBUG(x...) printk(KERN_DEBUG DCSS_NAME " debug:" x)
-#else
-#define PRINT_DEBUG(x...) do {} while (0)
-#endif
-#define PRINT_INFO(x...) printk(KERN_INFO DCSS_NAME " info:" x)
-#define PRINT_WARN(x...) printk(KERN_WARNING DCSS_NAME " warning:" x)
-#define PRINT_ERR(x...) printk(KERN_ERR DCSS_NAME " error:" x)
-
-
#define DCSS_LOADSHR 0x00
#define DCSS_LOADNSR 0x04
#define DCSS_PURGESEG 0x08
goto out_free;
}
if (diag_cc > 1) {
- PRINT_WARN ("segment_type: diag returned error %ld\n", vmrc);
+ pr_warning("Querying a DCSS type failed with rc=%ld\n", vmrc);
rc = dcss_diag_translate_rc (vmrc);
goto out_free;
}
* -EIO : could not perform query diagnose
* -ENOENT : no such segment
* -ENOTSUPP: multi-part segment cannot be used with linux
- * -ENOSPC : segment cannot be used (overlaps with storage)
* -ENOMEM : out of memory
* 0 .. 6 : type of segment as defined in include/asm-s390/extmem.h
*/
goto out_resource;
}
if (diag_cc > 1) {
- PRINT_WARN ("segment_load: could not load segment %s - "
- "diag returned error (%ld)\n",
- name, end_addr);
+ pr_warning("Loading DCSS %s failed with rc=%ld\n", name,
+ end_addr);
rc = dcss_diag_translate_rc(end_addr);
dcss_diag(&purgeseg_scode, seg->dcss_name,
&dummy, &dummy);
*addr = seg->start_addr;
*end = seg->end;
if (do_nonshared)
- PRINT_INFO ("segment_load: loaded segment %s range %p .. %p "
- "type %s in non-shared mode\n", name,
- (void*)seg->start_addr, (void*)seg->end,
- segtype_string[seg->vm_segtype]);
+ pr_info("DCSS %s of range %p to %p and type %s loaded as "
+ "exclusive-writable\n", name, (void*) seg->start_addr,
+ (void*) seg->end, segtype_string[seg->vm_segtype]);
else {
- PRINT_INFO ("segment_load: loaded segment %s range %p .. %p "
- "type %s in shared mode\n", name,
- (void*)seg->start_addr, (void*)seg->end,
- segtype_string[seg->vm_segtype]);
+ pr_info("DCSS %s of range %p to %p and type %s loaded in "
+ "shared access mode\n", name, (void*) seg->start_addr,
+ (void*) seg->end, segtype_string[seg->vm_segtype]);
}
goto out;
out_resource:
goto out_unlock;
}
if (do_nonshared == seg->do_nonshared) {
- PRINT_INFO ("segment_modify_shared: not reloading segment %s"
- " - already in requested mode\n",name);
+ pr_info("DCSS %s is already in the requested access "
+ "mode\n", name);
rc = 0;
goto out_unlock;
}
if (atomic_read (&seg->ref_count) != 1) {
- PRINT_WARN ("segment_modify_shared: not reloading segment %s - "
- "segment is in use by other driver(s)\n",name);
+ pr_warning("DCSS %s is in use and cannot be reloaded\n",
+ name);
rc = -EAGAIN;
goto out_unlock;
}
seg->res->flags |= IORESOURCE_READONLY;
if (request_resource(&iomem_resource, seg->res)) {
- PRINT_WARN("segment_modify_shared: could not reload segment %s"
- " - overlapping resources\n", name);
+ pr_warning("DCSS %s overlaps with used memory resources "
+ "and cannot be reloaded\n", name);
rc = -EBUSY;
kfree(seg->res);
goto out_del_mem;
goto out_del_res;
}
if (diag_cc > 1) {
- PRINT_WARN ("segment_modify_shared: could not reload segment %s"
- " - diag returned error (%ld)\n",
- name, end_addr);
+ pr_warning("Reloading DCSS %s failed with rc=%ld\n", name,
+ end_addr);
rc = dcss_diag_translate_rc(end_addr);
goto out_del_res;
}
mutex_lock(&dcss_lock);
seg = segment_by_name (name);
if (seg == NULL) {
- PRINT_ERR ("could not find segment %s in segment_unload, "
- "please report to linux390@de.ibm.com\n",name);
+ pr_err("Unloading unknown DCSS %s failed\n", name);
goto out_unlock;
}
if (atomic_dec_return(&seg->ref_count) != 0)
seg = segment_by_name (name);
if (seg == NULL) {
- PRINT_ERR("could not find segment %s in segment_save, please "
- "report to linux390@de.ibm.com\n", name);
+ pr_err("Saving unknown DCSS %s failed\n", name);
goto out;
}
response = 0;
cpcmd(cmd1, NULL, 0, &response);
if (response) {
- PRINT_ERR("segment_save: DEFSEG failed with response code %i\n",
- response);
+ pr_err("Saving a DCSS failed with DEFSEG response code "
+ "%i\n", response);
goto out;
}
cpcmd(cmd2, NULL, 0, &response);
if (response) {
- PRINT_ERR("segment_save: SAVESEG failed with response code %i\n",
- response);
+ pr_err("Saving a DCSS failed with SAVESEG response code "
+ "%i\n", response);
goto out;
}
out:
{
switch (rc) {
case -ENOENT:
- PRINT_WARN("cannot load/query segment %s, "
- "does not exist\n", seg_name);
+ pr_err("DCSS %s cannot be loaded or queried\n", seg_name);
break;
case -ENOSYS:
- PRINT_WARN("cannot load/query segment %s, "
- "not running on VM\n", seg_name);
+ pr_err("DCSS %s cannot be loaded or queried without "
+ "z/VM\n", seg_name);
break;
case -EIO:
- PRINT_WARN("cannot load/query segment %s, "
- "hardware error\n", seg_name);
+ pr_err("Loading or querying DCSS %s resulted in a "
+ "hardware error\n", seg_name);
break;
case -ENOTSUPP:
- PRINT_WARN("cannot load/query segment %s, "
- "is a multi-part segment\n", seg_name);
+ pr_err("DCSS %s has multiple page ranges and cannot be "
+ "loaded or queried\n", seg_name);
break;
case -ENOSPC:
- PRINT_WARN("cannot load/query segment %s, "
- "overlaps with storage\n", seg_name);
+ pr_err("DCSS %s overlaps with used storage and cannot "
+ "be loaded\n", seg_name);
break;
case -EBUSY:
- PRINT_WARN("cannot load/query segment %s, "
- "overlaps with already loaded dcss\n", seg_name);
+ pr_err("%s needs used memory resources and cannot be "
+ "loaded or queried\n", seg_name);
break;
case -EPERM:
- PRINT_WARN("cannot load/query segment %s, "
- "already loaded in incompatible mode\n", seg_name);
+ pr_err("DCSS %s is already loaded in a different access "
+ "mode\n", seg_name);
break;
case -ENOMEM:
- PRINT_WARN("cannot load/query segment %s, "
- "out of memory\n", seg_name);
+ pr_err("There is not enough memory to load or query "
+ "DCSS %s\n", seg_name);
break;
case -ERANGE:
- PRINT_WARN("cannot load/query segment %s, "
- "exceeds kernel mapping range\n", seg_name);
+ pr_err("DCSS %s exceeds the kernel mapping range (%lu) "
+ "and cannot be loaded\n", seg_name, VMEM_MAX_PHYS);
break;
default:
- PRINT_WARN("cannot load/query segment %s, "
- "return value %i\n", seg_name, rc);
break;
}
}
* Authors: Carsten Otte, Stefan Weinhuber, Gerald Schaefer
*/
+#define KMSG_COMPONENT "dcssblk"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/ctype.h>
#include <linux/interrupt.h>
#include <asm/s390_rdev.h>
-//#define DCSSBLK_DEBUG /* Debug messages on/off */
#define DCSSBLK_NAME "dcssblk"
#define DCSSBLK_MINORS_PER_DISK 1
#define DCSSBLK_PARM_LEN 400
#define DCSS_BUS_ID_SIZE 20
-#ifdef DCSSBLK_DEBUG
-#define PRINT_DEBUG(x...) printk(KERN_DEBUG DCSSBLK_NAME " debug: " x)
-#else
-#define PRINT_DEBUG(x...) do {} while (0)
-#endif
-#define PRINT_INFO(x...) printk(KERN_INFO DCSSBLK_NAME " info: " x)
-#define PRINT_WARN(x...) printk(KERN_WARNING DCSSBLK_NAME " warning: " x)
-#define PRINT_ERR(x...) printk(KERN_ERR DCSSBLK_NAME " error: " x)
-
static int dcssblk_open(struct block_device *bdev, fmode_t mode);
static int dcssblk_release(struct gendisk *disk, fmode_t mode);
static int dcssblk_make_request(struct request_queue *q, struct bio *bio);
/* check continuity */
for (i = 0; i < dev_info->num_of_segments - 1; i++) {
if ((sort_list[i].end + 1) != sort_list[i+1].start) {
- PRINT_ERR("Segment %s is not contiguous with "
- "segment %s\n",
- sort_list[i].segment_name,
- sort_list[i+1].segment_name);
+ pr_err("Adjacent DCSSs %s and %s are not "
+ "contiguous\n", sort_list[i].segment_name,
+ sort_list[i+1].segment_name);
rc = -EINVAL;
goto out;
}
!(sort_list[i+1].segment_type &
SEGMENT_EXCLUSIVE) ||
(sort_list[i+1].segment_type == SEG_TYPE_ER)) {
- PRINT_ERR("Segment %s has different type from "
- "segment %s\n",
- sort_list[i].segment_name,
- sort_list[i+1].segment_name);
+ pr_err("DCSS %s and DCSS %s have "
+ "incompatible types\n",
+ sort_list[i].segment_name,
+ sort_list[i+1].segment_name);
rc = -EINVAL;
goto out;
}
} else if (inbuf[0] == '0') {
/* reload segments in exclusive mode */
if (dev_info->segment_type == SEG_TYPE_SC) {
- PRINT_ERR("Segment type SC (%s) cannot be loaded in "
- "non-shared mode\n", dev_info->segment_name);
+ pr_err("DCSS %s is of type SC and cannot be "
+ "loaded as exclusive-writable\n",
+ dev_info->segment_name);
rc = -EINVAL;
goto out;
}
goto out;
removeseg:
- PRINT_ERR("Could not reload segment(s) of the device %s, removing "
- "segment(s) now!\n",
- dev_info->segment_name);
+ pr_err("DCSS device %s is removed after a failed access mode "
+ "change\n", dev_info->segment_name);
temp = entry;
list_for_each_entry(entry, &dev_info->seg_list, lh) {
if (entry != temp)
if (inbuf[0] == '1') {
if (atomic_read(&dev_info->use_count) == 0) {
// device is idle => we save immediately
- PRINT_INFO("Saving segment(s) of the device %s\n",
- dev_info->segment_name);
+ pr_info("All DCSSs that map to device %s are "
+ "saved\n", dev_info->segment_name);
list_for_each_entry(entry, &dev_info->seg_list, lh) {
segment_save(entry->segment_name);
}
} else {
// device is busy => we save it when it becomes
// idle in dcssblk_release
- PRINT_INFO("Device %s is currently busy, segment(s) "
- "will be saved when it becomes idle...\n",
- dev_info->segment_name);
+ pr_info("Device %s is in use, its DCSSs will be "
+ "saved when it becomes idle\n",
+ dev_info->segment_name);
dev_info->save_pending = 1;
}
} else if (inbuf[0] == '0') {
// device is busy & the user wants to undo his save
// request
dev_info->save_pending = 0;
- PRINT_INFO("Pending save for segment(s) of the device "
- "%s deactivated\n",
- dev_info->segment_name);
+ pr_info("A pending save request for device %s "
+ "has been canceled\n",
+ dev_info->segment_name);
}
} else {
up_write(&dcssblk_devices_sem);
seg_byte_size = (dev_info->end - dev_info->start + 1);
set_capacity(dev_info->gd, seg_byte_size >> 9); // size in sectors
- PRINT_INFO("Loaded segment(s) %s, size = %lu Byte, "
- "capacity = %lu (512 Byte) sectors\n", local_buf,
- seg_byte_size, seg_byte_size >> 9);
+ pr_info("Loaded %s with total size %lu bytes and capacity %lu "
+ "sectors\n", local_buf, seg_byte_size, seg_byte_size >> 9);
dev_info->save_pending = 0;
dev_info->is_shared = 1;
dev_info = dcssblk_get_device_by_name(local_buf);
if (dev_info == NULL) {
up_write(&dcssblk_devices_sem);
- PRINT_WARN("Device %s is not loaded!\n", local_buf);
+ pr_warning("Device %s cannot be removed because it is not a "
+ "known device\n", local_buf);
rc = -ENODEV;
goto out_buf;
}
if (atomic_read(&dev_info->use_count) != 0) {
up_write(&dcssblk_devices_sem);
- PRINT_WARN("Device %s is in use!\n", local_buf);
+ pr_warning("Device %s cannot be removed while it is in "
+ "use\n", local_buf);
rc = -EBUSY;
goto out_buf;
}
down_write(&dcssblk_devices_sem);
if (atomic_dec_and_test(&dev_info->use_count)
&& (dev_info->save_pending)) {
- PRINT_INFO("Device %s became idle and is being saved now\n",
- dev_info->segment_name);
+ pr_info("Device %s has become idle and is being saved "
+ "now\n", dev_info->segment_name);
list_for_each_entry(entry, &dev_info->seg_list, lh) {
segment_save(entry->segment_name);
}
case SEG_TYPE_SC:
/* cannot write to these segments */
if (bio_data_dir(bio) == WRITE) {
- PRINT_WARN("rejecting write to ro device %s\n",
+ pr_warning("Writing to %s failed because it "
+ "is a read-only device\n",
dev_name(&dev_info->dev));
goto fail;
}
projects / cascardo / linux.git / commitdiff