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authorLinus Torvalds <torvalds@linux-foundation.org>2011-07-24 09:55:45 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-07-24 09:55:45 -0700
commit21c7075fa5a756f1c95f6b463ff42cd320cc0301 (patch)
tree69524dd01fbebe662abe3b7296664592d3ce562b /drivers
parentff0c4ad2c3a75ccfe6adca916e50804eb45bb2d9 (diff)
parent73b7d40ff1bcd44b4245c2714b88cf872fe44685 (diff)
Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6
* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6: (21 commits) [S390] use siginfo for sigtrap signals [S390] dasd: add enhanced DASD statistics interface [S390] kvm: make sigp emerg smp capable [S390] disable cpu measurement alerts on a dying cpu [S390] initial cr0 bits [S390] iucv cr0 enablement bit [S390] race safe external interrupt registration [S390] remove tape block docu [S390] ap: toleration support for ap device type 10 [S390] cleanup program check handler prototypes [S390] remove kvm mmu reload on s390 [S390] Use gmap translation for accessing guest memory [S390] use gmap address spaces for kvm guest images [S390] kvm guest address space mapping [S390] fix s390 assembler code alignments [S390] move sie code to entry.S [S390] kvm: handle tprot intercepts [S390] qdio: clear shared DSCI before scheduling the queue handler [S390] reference bit testing for unmapped pages [S390] irqs: Do not trace arch_local_{*,irq_*} functions ...
Diffstat (limited to 'drivers')
-rw-r--r--drivers/s390/block/dasd.c576
-rw-r--r--drivers/s390/block/dasd_int.h57
-rw-r--r--drivers/s390/block/dasd_ioctl.c38
-rw-r--r--drivers/s390/block/dasd_proc.c106
-rw-r--r--drivers/s390/char/Kconfig3
-rw-r--r--drivers/s390/cio/qdio_thinint.c15
-rw-r--r--drivers/s390/crypto/ap_bus.c96
-rw-r--r--drivers/s390/crypto/ap_bus.h22
8 files changed, 782 insertions, 131 deletions
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index 86b6f1cc1b1..432444af7ee 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -22,6 +22,8 @@
#include <linux/hdreg.h>
#include <linux/async.h>
#include <linux/mutex.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
#include <asm/ccwdev.h>
#include <asm/ebcdic.h>
@@ -45,6 +47,7 @@
* SECTION: exported variables of dasd.c
*/
debug_info_t *dasd_debug_area;
+static struct dentry *dasd_debugfs_root_entry;
struct dasd_discipline *dasd_diag_discipline_pointer;
void dasd_int_handler(struct ccw_device *, unsigned long, struct irb *);
@@ -71,6 +74,8 @@ static void dasd_return_cqr_cb(struct dasd_ccw_req *, void *);
static void dasd_device_timeout(unsigned long);
static void dasd_block_timeout(unsigned long);
static void __dasd_process_erp(struct dasd_device *, struct dasd_ccw_req *);
+static void dasd_profile_init(struct dasd_profile *, struct dentry *);
+static void dasd_profile_exit(struct dasd_profile *);
/*
* SECTION: Operations on the device structure.
@@ -121,7 +126,7 @@ struct dasd_device *dasd_alloc_device(void)
device->state = DASD_STATE_NEW;
device->target = DASD_STATE_NEW;
mutex_init(&device->state_mutex);
-
+ spin_lock_init(&device->profile.lock);
return device;
}
@@ -159,6 +164,7 @@ struct dasd_block *dasd_alloc_block(void)
init_timer(&block->timer);
block->timer.function = dasd_block_timeout;
block->timer.data = (unsigned long) block;
+ spin_lock_init(&block->profile.lock);
return block;
}
@@ -222,19 +228,44 @@ static int dasd_state_known_to_new(struct dasd_device *device)
return 0;
}
+static struct dentry *dasd_debugfs_setup(const char *name,
+ struct dentry *base_dentry)
+{
+ struct dentry *pde;
+
+ if (!base_dentry)
+ return NULL;
+ pde = debugfs_create_dir(name, base_dentry);
+ if (!pde || IS_ERR(pde))
+ return NULL;
+ return pde;
+}
+
/*
* Request the irq line for the device.
*/
static int dasd_state_known_to_basic(struct dasd_device *device)
{
+ struct dasd_block *block = device->block;
int rc;
/* Allocate and register gendisk structure. */
- if (device->block) {
- rc = dasd_gendisk_alloc(device->block);
+ if (block) {
+ rc = dasd_gendisk_alloc(block);
if (rc)
return rc;
- }
+ block->debugfs_dentry =
+ dasd_debugfs_setup(block->gdp->disk_name,
+ dasd_debugfs_root_entry);
+ dasd_profile_init(&block->profile, block->debugfs_dentry);
+ if (dasd_global_profile_level == DASD_PROFILE_ON)
+ dasd_profile_on(&device->block->profile);
+ }
+ device->debugfs_dentry =
+ dasd_debugfs_setup(dev_name(&device->cdev->dev),
+ dasd_debugfs_root_entry);
+ dasd_profile_init(&device->profile, device->debugfs_dentry);
+
/* register 'device' debug area, used for all DBF_DEV_XXX calls */
device->debug_area = debug_register(dev_name(&device->cdev->dev), 4, 1,
8 * sizeof(long));
@@ -253,6 +284,9 @@ static int dasd_state_basic_to_known(struct dasd_device *device)
{
int rc;
if (device->block) {
+ dasd_profile_exit(&device->block->profile);
+ if (device->block->debugfs_dentry)
+ debugfs_remove(device->block->debugfs_dentry);
dasd_gendisk_free(device->block);
dasd_block_clear_timer(device->block);
}
@@ -260,6 +294,9 @@ static int dasd_state_basic_to_known(struct dasd_device *device)
if (rc)
return rc;
dasd_device_clear_timer(device);
+ dasd_profile_exit(&device->profile);
+ if (device->debugfs_dentry)
+ debugfs_remove(device->debugfs_dentry);
DBF_DEV_EVENT(DBF_EMERG, device, "%p debug area deleted", device);
if (device->debug_area != NULL) {
@@ -609,21 +646,13 @@ void dasd_enable_device(struct dasd_device *device)
/*
* SECTION: device operation (interrupt handler, start i/o, term i/o ...)
*/
-#ifdef CONFIG_DASD_PROFILE
-struct dasd_profile_info_t dasd_global_profile;
-unsigned int dasd_profile_level = DASD_PROFILE_OFF;
+unsigned int dasd_global_profile_level = DASD_PROFILE_OFF;
-/*
- * Increments counter in global and local profiling structures.
- */
-#define dasd_profile_counter(value, counter, block) \
-{ \
- int index; \
- for (index = 0; index < 31 && value >> (2+index); index++); \
- dasd_global_profile.counter[index]++; \
- block->profile.counter[index]++; \
-}
+#ifdef CONFIG_DASD_PROFILE
+struct dasd_profile_info dasd_global_profile_data;
+static struct dentry *dasd_global_profile_dentry;
+static struct dentry *dasd_debugfs_global_entry;
/*
* Add profiling information for cqr before execution.
@@ -634,30 +663,121 @@ static void dasd_profile_start(struct dasd_block *block,
{
struct list_head *l;
unsigned int counter;
-
- if (dasd_profile_level != DASD_PROFILE_ON)
- return;
+ struct dasd_device *device;
/* count the length of the chanq for statistics */
counter = 0;
- list_for_each(l, &block->ccw_queue)
- if (++counter >= 31)
- break;
- dasd_global_profile.dasd_io_nr_req[counter]++;
- block->profile.dasd_io_nr_req[counter]++;
+ if (dasd_global_profile_level || block->profile.data)
+ list_for_each(l, &block->ccw_queue)
+ if (++counter >= 31)
+ break;
+
+ if (dasd_global_profile_level) {
+ dasd_global_profile_data.dasd_io_nr_req[counter]++;
+ if (rq_data_dir(req) == READ)
+ dasd_global_profile_data.dasd_read_nr_req[counter]++;
+ }
+
+ spin_lock(&block->profile.lock);
+ if (block->profile.data)
+ block->profile.data->dasd_io_nr_req[counter]++;
+ if (rq_data_dir(req) == READ)
+ block->profile.data->dasd_read_nr_req[counter]++;
+ spin_unlock(&block->profile.lock);
+
+ /*
+ * We count the request for the start device, even though it may run on
+ * some other device due to error recovery. This way we make sure that
+ * we count each request only once.
+ */
+ device = cqr->startdev;
+ if (device->profile.data) {
+ counter = 1; /* request is not yet queued on the start device */
+ list_for_each(l, &device->ccw_queue)
+ if (++counter >= 31)
+ break;
+ }
+ spin_lock(&device->profile.lock);
+ if (device->profile.data) {
+ device->profile.data->dasd_io_nr_req[counter]++;
+ if (rq_data_dir(req) == READ)
+ device->profile.data->dasd_read_nr_req[counter]++;
+ }
+ spin_unlock(&device->profile.lock);
}
/*
* Add profiling information for cqr after execution.
*/
+
+#define dasd_profile_counter(value, index) \
+{ \
+ for (index = 0; index < 31 && value >> (2+index); index++) \
+ ; \
+}
+
+static void dasd_profile_end_add_data(struct dasd_profile_info *data,
+ int is_alias,
+ int is_tpm,
+ int is_read,
+ long sectors,
+ int sectors_ind,
+ int tottime_ind,
+ int tottimeps_ind,
+ int strtime_ind,
+ int irqtime_ind,
+ int irqtimeps_ind,
+ int endtime_ind)
+{
+ /* in case of an overflow, reset the whole profile */
+ if (data->dasd_io_reqs == UINT_MAX) {
+ memset(data, 0, sizeof(*data));
+ getnstimeofday(&data->starttod);
+ }
+ data->dasd_io_reqs++;
+ data->dasd_io_sects += sectors;
+ if (is_alias)
+ data->dasd_io_alias++;
+ if (is_tpm)
+ data->dasd_io_tpm++;
+
+ data->dasd_io_secs[sectors_ind]++;
+ data->dasd_io_times[tottime_ind]++;
+ data->dasd_io_timps[tottimeps_ind]++;
+ data->dasd_io_time1[strtime_ind]++;
+ data->dasd_io_time2[irqtime_ind]++;
+ data->dasd_io_time2ps[irqtimeps_ind]++;
+ data->dasd_io_time3[endtime_ind]++;
+
+ if (is_read) {
+ data->dasd_read_reqs++;
+ data->dasd_read_sects += sectors;
+ if (is_alias)
+ data->dasd_read_alias++;
+ if (is_tpm)
+ data->dasd_read_tpm++;
+ data->dasd_read_secs[sectors_ind]++;
+ data->dasd_read_times[tottime_ind]++;
+ data->dasd_read_time1[strtime_ind]++;
+ data->dasd_read_time2[irqtime_ind]++;
+ data->dasd_read_time3[endtime_ind]++;
+ }
+}
+
static void dasd_profile_end(struct dasd_block *block,
struct dasd_ccw_req *cqr,
struct request *req)
{
long strtime, irqtime, endtime, tottime; /* in microseconds */
long tottimeps, sectors;
+ struct dasd_device *device;
+ int sectors_ind, tottime_ind, tottimeps_ind, strtime_ind;
+ int irqtime_ind, irqtimeps_ind, endtime_ind;
- if (dasd_profile_level != DASD_PROFILE_ON)
+ device = cqr->startdev;
+ if (!(dasd_global_profile_level ||
+ block->profile.data ||
+ device->profile.data))
return;
sectors = blk_rq_sectors(req);
@@ -672,29 +792,392 @@ static void dasd_profile_end(struct dasd_block *block,
tottime = ((cqr->endclk - cqr->buildclk) >> 12);
tottimeps = tottime / sectors;
- if (!dasd_global_profile.dasd_io_reqs)
- memset(&dasd_global_profile, 0,
- sizeof(struct dasd_profile_info_t));
- dasd_global_profile.dasd_io_reqs++;
- dasd_global_profile.dasd_io_sects += sectors;
-
- if (!block->profile.dasd_io_reqs)
- memset(&block->profile, 0,
- sizeof(struct dasd_profile_info_t));
- block->profile.dasd_io_reqs++;
- block->profile.dasd_io_sects += sectors;
-
- dasd_profile_counter(sectors, dasd_io_secs, block);
- dasd_profile_counter(tottime, dasd_io_times, block);
- dasd_profile_counter(tottimeps, dasd_io_timps, block);
- dasd_profile_counter(strtime, dasd_io_time1, block);
- dasd_profile_counter(irqtime, dasd_io_time2, block);
- dasd_profile_counter(irqtime / sectors, dasd_io_time2ps, block);
- dasd_profile_counter(endtime, dasd_io_time3, block);
+ dasd_profile_counter(sectors, sectors_ind);
+ dasd_profile_counter(tottime, tottime_ind);
+ dasd_profile_counter(tottimeps, tottimeps_ind);
+ dasd_profile_counter(strtime, strtime_ind);
+ dasd_profile_counter(irqtime, irqtime_ind);
+ dasd_profile_counter(irqtime / sectors, irqtimeps_ind);
+ dasd_profile_counter(endtime, endtime_ind);
+
+ if (dasd_global_profile_level) {
+ dasd_profile_end_add_data(&dasd_global_profile_data,
+ cqr->startdev != block->base,
+ cqr->cpmode == 1,
+ rq_data_dir(req) == READ,
+ sectors, sectors_ind, tottime_ind,
+ tottimeps_ind, strtime_ind,
+ irqtime_ind, irqtimeps_ind,
+ endtime_ind);
+ }
+
+ spin_lock(&block->profile.lock);
+ if (block->profile.data)
+ dasd_profile_end_add_data(block->profile.data,
+ cqr->startdev != block->base,
+ cqr->cpmode == 1,
+ rq_data_dir(req) == READ,
+ sectors, sectors_ind, tottime_ind,
+ tottimeps_ind, strtime_ind,
+ irqtime_ind, irqtimeps_ind,
+ endtime_ind);
+ spin_unlock(&block->profile.lock);
+
+ spin_lock(&device->profile.lock);
+ if (device->profile.data)
+ dasd_profile_end_add_data(device->profile.data,
+ cqr->startdev != block->base,
+ cqr->cpmode == 1,
+ rq_data_dir(req) == READ,
+ sectors, sectors_ind, tottime_ind,
+ tottimeps_ind, strtime_ind,
+ irqtime_ind, irqtimeps_ind,
+ endtime_ind);
+ spin_unlock(&device->profile.lock);
+}
+
+void dasd_profile_reset(struct dasd_profile *profile)
+{
+ struct dasd_profile_info *data;
+
+ spin_lock_bh(&profile->lock);
+ data = profile->data;
+ if (!data) {
+ spin_unlock_bh(&profile->lock);
+ return;
+ }
+ memset(data, 0, sizeof(*data));
+ getnstimeofday(&data->starttod);
+ spin_unlock_bh(&profile->lock);
+}
+
+void dasd_global_profile_reset(void)
+{
+ memset(&dasd_global_profile_data, 0, sizeof(dasd_global_profile_data));
+ getnstimeofday(&dasd_global_profile_data.starttod);
+}
+
+int dasd_profile_on(struct dasd_profile *profile)
+{
+ struct dasd_profile_info *data;
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+ spin_lock_bh(&profile->lock);
+ if (profile->data) {
+ spin_unlock_bh(&profile->lock);
+ kfree(data);
+ return 0;
+ }
+ getnstimeofday(&data->starttod);
+ profile->data = data;
+ spin_unlock_bh(&profile->lock);
+ return 0;
+}
+
+void dasd_profile_off(struct dasd_profile *profile)
+{
+ spin_lock_bh(&profile->lock);
+ kfree(profile->data);
+ profile->data = NULL;
+ spin_unlock_bh(&profile->lock);
+}
+
+char *dasd_get_user_string(const char __user *user_buf, size_t user_len)
+{
+ char *buffer;
+
+ buffer = kmalloc(user_len + 1, GFP_KERNEL);
+ if (buffer == NULL)
+ return ERR_PTR(-ENOMEM);
+ if (copy_from_user(buffer, user_buf, user_len) != 0) {
+ kfree(buffer);
+ return ERR_PTR(-EFAULT);
+ }
+ /* got the string, now strip linefeed. */
+ if (buffer[user_len - 1] == '\n')
+ buffer[user_len - 1] = 0;
+ else
+ buffer[user_len] = 0;
+ return buffer;
}
+
+static ssize_t dasd_stats_write(struct file *file,
+ const char __user *user_buf,
+ size_t user_len, loff_t *pos)
+{
+ char *buffer, *str;
+ int rc;
+ struct seq_file *m = (struct seq_file *)file->private_data;
+ struct dasd_profile *prof = m->private;
+
+ if (user_len > 65536)
+ user_len = 65536;
+ buffer = dasd_get_user_string(user_buf, user_len);
+ if (IS_ERR(buffer))
+ return PTR_ERR(buffer);
+
+ str = skip_spaces(buffer);
+ rc = user_len;
+ if (strncmp(str, "reset", 5) == 0) {
+ dasd_profile_reset(prof);
+ } else if (strncmp(str, "on", 2) == 0) {
+ rc = dasd_profile_on(prof);
+ if (!rc)
+ rc = user_len;
+ } else if (strncmp(str, "off", 3) == 0) {
+ dasd_profile_off(prof);
+ } else
+ rc = -EINVAL;
+ kfree(buffer);
+ return rc;
+}
+
+static void dasd_stats_array(struct seq_file *m, unsigned int *array)
+{
+ int i;
+
+ for (i = 0; i < 32; i++)
+ seq_printf(m, "%u ", array[i]);
+ seq_putc(m, '\n');
+}
+
+static void dasd_stats_seq_print(struct seq_file *m,
+ struct dasd_profile_info *data)
+{
+ seq_printf(m, "start_time %ld.%09ld\n",
+ data->starttod.tv_sec, data->starttod.tv_nsec);
+ seq_printf(m, "total_requests %u\n", data->dasd_io_reqs);
+ seq_printf(m, "total_sectors %u\n", data->dasd_io_sects);
+ seq_printf(m, "total_pav %u\n", data->dasd_io_alias);
+ seq_printf(m, "total_hpf %u\n", data->dasd_io_tpm);
+ seq_printf(m, "histogram_sectors ");
+ dasd_stats_array(m, data->dasd_io_secs);
+ seq_printf(m, "histogram_io_times ");
+ dasd_stats_array(m, data->dasd_io_times);
+ seq_printf(m, "histogram_io_times_weighted ");
+ dasd_stats_array(m, data->dasd_io_timps);
+ seq_printf(m, "histogram_time_build_to_ssch ");
+ dasd_stats_array(m, data->dasd_io_time1);
+ seq_printf(m, "histogram_time_ssch_to_irq ");
+ dasd_stats_array(m, data->dasd_io_time2);
+ seq_printf(m, "histogram_time_ssch_to_irq_weighted ");
+ dasd_stats_array(m, data->dasd_io_time2ps);
+ seq_printf(m, "histogram_time_irq_to_end ");
+ dasd_stats_array(m, data->dasd_io_time3);
+ seq_printf(m, "histogram_ccw_queue_length ");
+ dasd_stats_array(m, data->dasd_io_nr_req);
+ seq_printf(m, "total_read_requests %u\n", data->dasd_read_reqs);
+ seq_printf(m, "total_read_sectors %u\n", data->dasd_read_sects);
+ seq_printf(m, "total_read_pav %u\n", data->dasd_read_alias);
+ seq_printf(m, "total_read_hpf %u\n", data->dasd_read_tpm);
+ seq_printf(m, "histogram_read_sectors ");
+ dasd_stats_array(m, data->dasd_read_secs);
+ seq_printf(m, "histogram_read_times ");
+ dasd_stats_array(m, data->dasd_read_times);
+ seq_printf(m, "histogram_read_time_build_to_ssch ");
+ dasd_stats_array(m, data->dasd_read_time1);
+ seq_printf(m, "histogram_read_time_ssch_to_irq ");
+ dasd_stats_array(m, data->dasd_read_time2);
+ seq_printf(m, "histogram_read_time_irq_to_end ");
+ dasd_stats_array(m, data->dasd_read_time3);
+ seq_printf(m, "histogram_read_ccw_queue_length ");
+ dasd_stats_array(m, data->dasd_read_nr_req);
+}
+
+static int dasd_stats_show(struct seq_file *m, void *v)
+{
+ struct dasd_profile *profile;
+ struct dasd_profile_info *data;
+
+ profile = m->private;
+ spin_lock_bh(&profile->lock);
+ data = profile->data;
+ if (!data) {
+ spin_unlock_bh(&profile->lock);
+ seq_printf(m, "disabled\n");
+ return 0;
+ }
+ dasd_stats_seq_print(m, data);
+ spin_unlock_bh(&profile->lock);
+ return 0;
+}
+
+static int dasd_stats_open(struct inode *inode, struct file *file)
+{
+ struct dasd_profile *profile = inode->i_private;
+ return single_open(file, dasd_stats_show, profile);
+}
+
+static const struct file_operations dasd_stats_raw_fops = {
+ .owner = THIS_MODULE,
+ .open = dasd_stats_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = dasd_stats_write,
+};
+
+static ssize_t dasd_stats_global_write(struct file *file,
+ const char __user *user_buf,
+ size_t user_len, loff_t *pos)
+{
+ char *buffer, *str;
+ ssize_t rc;
+
+ if (user_len > 65536)
+ user_len = 65536;
+ buffer = dasd_get_user_string(user_buf, user_len);
+ if (IS_ERR(buffer))
+ return PTR_ERR(buffer);
+ str = skip_spaces(buffer);
+ rc = user_len;
+ if (strncmp(str, "reset", 5) == 0) {
+ dasd_global_profile_reset();
+ } else if (strncmp(str, "on", 2) == 0) {
+ dasd_global_profile_reset();
+ dasd_global_profile_level = DASD_PROFILE_GLOBAL_ONLY;
+ } else if (strncmp(str, "off", 3) == 0) {
+ dasd_global_profile_level = DASD_PROFILE_OFF;
+ } else
+ rc = -EINVAL;
+ kfree(buffer);
+ return rc;
+}
+
+static int dasd_stats_global_show(struct seq_file *m, void *v)
+{
+ if (!dasd_global_profile_level) {
+ seq_printf(m, "disabled\n");
+ return 0;
+ }
+ dasd_stats_seq_print(m, &dasd_global_profile_data);
+ return 0;
+}
+
+static int dasd_stats_global_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, dasd_stats_global_show, NULL);
+}
+
+static const struct file_operations dasd_stats_global_fops = {
+ .owner = THIS_MODULE,
+ .open = dasd_stats_global_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = dasd_stats_global_write,
+};
+
+static void dasd_profile_init(struct dasd_profile *profile,
+ struct dentry *base_dentry)
+{
+ mode_t mode;
+ struct dentry *pde;
+
+ if (!base_dentry)
+ return;
+ profile->dentry = NULL;
+ profile->data = NULL;
+ mode = (S_IRUSR | S_IWUSR | S_IFREG);
+ pde = debugfs_create_file("statistics", mode, base_dentry,
+ profile, &dasd_stats_raw_fops);
+ if (pde && !IS_ERR(pde))
+ profile->dentry = pde;
+ return;
+}
+
+static void dasd_profile_exit(struct dasd_profile *profile)
+{
+ dasd_profile_off(profile);
+ if (profile->dentry) {
+ debugfs_remove(profile->dentry);
+ profile->dentry = NULL;
+ }
+}
+
+static void dasd_statistics_removeroot(void)
+{
+ dasd_global_profile_level = DASD_PROFILE_OFF;
+ if (dasd_global_profile_dentry) {
+ debugfs_remove(dasd_global_profile_dentry);
+ dasd_global_profile_dentry = NULL;
+ }
+ if (dasd_debugfs_global_entry)
+ debugfs_remove(dasd_debugfs_global_entry);
+ if (dasd_debugfs_root_entry)
+ debugfs_remove(dasd_debugfs_root_entry);
+}
+
+static void dasd_statistics_createroot(void)
+{
+ mode_t mode;
+ struct dentry *pde;
+
+ dasd_debugfs_root_entry = NULL;
+ dasd_debugfs_global_entry = NULL;
+ dasd_global_profile_dentry = NULL;
+ pde = debugfs_create_dir("dasd", NULL);
+ if (!pde || IS_ERR(pde))
+ goto error;
+ dasd_debugfs_root_entry = pde;
+ pde = debugfs_create_dir("global", dasd_debugfs_root_entry);
+ if (!pde || IS_ERR(pde))
+ goto error;
+ dasd_debugfs_global_entry = pde;
+
+ mode = (S_IRUSR | S_IWUSR | S_IFREG);
+ pde = debugfs_create_file("statistics", mode, dasd_debugfs_global_entry,
+ NULL, &dasd_stats_global_fops);
+ if (!pde || IS_ERR(pde))
+ goto error;
+ dasd_global_profile_dentry = pde;
+ return;
+
+error:
+ DBF_EVENT(DBF_ERR, "%s",
+ "Creation of the dasd debugfs interface failed");
+ dasd_statistics_removeroot();
+ return;
+}
+
#else
#define dasd_profile_start(block, cqr, req) do {} while (0)
#define dasd_profile_end(block, cqr, req) do {} while (0)
+
+static void dasd_statistics_createroot(void)
+{
+ return;
+}
+
+static void dasd_statistics_removeroot(void)
+{
+ return;
+}
+
+int dasd_stats_generic_show(struct seq_file *m, void *v)
+{
+ seq_printf(m, "Statistics are not activated in this kernel\n");
+ return 0;
+}
+
+static void dasd_profile_init(struct dasd_profile *profile,
+ struct dentry *base_dentry)
+{
+ return;
+}
+
+static void dasd_profile_exit(struct dasd_profile *profile)
+{
+ return;
+}
+
+int dasd_profile_on(struct dasd_profile *profile)
+{
+ return 0;
+}
+
#endif /* CONFIG_DASD_PROFILE */
/*
@@ -2441,6 +2924,7 @@ dasd_exit(void)
debug_unregister(dasd_debug_area);
dasd_debug_area = NULL;
}
+ dasd_statistics_removeroot();
}
/*
@@ -2992,6 +3476,8 @@ static int __init dasd_init(void)
dasd_diag_discipline_pointer = NULL;
+ dasd_statistics_createroot();
+
rc = dasd_devmap_init();
if (rc)
goto failed;
diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h
index d1e4f2c1264..1dd12bd85a6 100644
--- a/drivers/s390/block/dasd_int.h
+++ b/drivers/s390/block/dasd_int.h
@@ -382,6 +382,41 @@ struct dasd_path {
__u8 npm;
};
+struct dasd_profile_info {
+ /* legacy part of profile data, as in dasd_profile_info_t */
+ unsigned int dasd_io_reqs; /* number of requests processed */
+ unsigned int dasd_io_sects; /* number of sectors processed */
+ unsigned int dasd_io_secs[32]; /* histogram of request's sizes */
+ unsigned int dasd_io_times[32]; /* histogram of requests's times */
+ unsigned int dasd_io_timps[32]; /* h. of requests's times per sector */
+ unsigned int dasd_io_time1[32]; /* hist. of time from build to start */
+ unsigned int dasd_io_time2[32]; /* hist. of time from start to irq */
+ unsigned int dasd_io_time2ps[32]; /* hist. of time from start to irq */
+ unsigned int dasd_io_time3[32]; /* hist. of time from irq to end */
+ unsigned int dasd_io_nr_req[32]; /* hist. of # of requests in chanq */
+
+ /* new data */
+ struct timespec starttod; /* time of start or last reset */
+ unsigned int dasd_io_alias; /* requests using an alias */
+ unsigned int dasd_io_tpm; /* requests using transport mode */
+ unsigned int dasd_read_reqs; /* total number of read requests */
+ unsigned int dasd_read_sects; /* total number read sectors */
+ unsigned int dasd_read_alias; /* read request using an alias */
+ unsigned int dasd_read_tpm; /* read requests in transport mode */
+ unsigned int dasd_read_secs[32]; /* histogram of request's sizes */
+ unsigned int dasd_read_times[32]; /* histogram of requests's times */
+ unsigned int dasd_read_time1[32]; /* hist. time from build to start */
+ unsigned int dasd_read_time2[32]; /* hist. of time from start to irq */
+ unsigned int dasd_read_time3[32]; /* hist. of time from irq to end */
+ unsigned int dasd_read_nr_req[32]; /* hist. of # of requests in chanq */
+};
+
+struct dasd_profile {
+ struct dentry *dentry;
+ struct dasd_profile_info *data;
+ spinlock_t lock;
+};
+
struct dasd_device {
/* Block device stuff. */
struct dasd_block *block;
@@ -431,6 +466,9 @@ struct dasd_device {
/* default expiration time in s */
unsigned long default_expires;
+
+ struct dentry *debugfs_dentry;
+ struct dasd_profile profile;
};
struct dasd_block {
@@ -453,9 +491,8 @@ struct dasd_block {
struct tasklet_struct tasklet;
struct timer_list timer;
-#ifdef CONFIG_DASD_PROFILE
- struct dasd_profile_info_t profile;
-#endif
+ struct dentry *debugfs_dentry;
+ struct dasd_profile profile;
};
@@ -589,12 +626,13 @@ dasd_check_blocksize(int bsize)
}
/* externals in dasd.c */
-#define DASD_PROFILE_ON 1
-#define DASD_PROFILE_OFF 0
+#define DASD_PROFILE_OFF 0
+#define DASD_PROFILE_ON 1
+#define DASD_PROFILE_GLOBAL_ONLY 2
extern debug_info_t *dasd_debug_area;
-extern struct dasd_profile_info_t dasd_global_profile;
-extern unsigned int dasd_profile_level;
+extern struct dasd_profile_info dasd_global_profile_data;
+extern unsigned int dasd_global_profile_level;
extern const struct block_device_operations dasd_device_operations;
extern struct kmem_cache *dasd_page_cache;
@@ -662,6 +700,11 @@ void dasd_device_remove_stop_bits(struct dasd_device *, int);
int dasd_device_is_ro(struct dasd_device *);
+void dasd_profile_reset(struct dasd_profile *);
+int dasd_profile_on(struct dasd_profile *);
+void dasd_profile_off(struct dasd_profile *);
+void dasd_global_profile_reset(void);
+char *dasd_get_user_string(const char __user *, size_t);
/* externals in dasd_devmap.c */
extern int dasd_max_devindex;
diff --git a/drivers/s390/block/dasd_ioctl.c b/drivers/s390/block/dasd_ioctl.c
index 72261e4c516..eb4e034378c 100644
--- a/drivers/s390/block/dasd_ioctl.c
+++ b/drivers/s390/block/dasd_ioctl.c
@@ -239,7 +239,7 @@ dasd_ioctl_format(struct block_device *bdev, void __user *argp)
*/
static int dasd_ioctl_reset_profile(struct dasd_block *block)
{
- memset(&block->profile, 0, sizeof(struct dasd_profile_info_t));
+ dasd_profile_reset(&block->profile);
return 0;
}
@@ -248,10 +248,40 @@ static int dasd_ioctl_reset_profile(struct dasd_block *block)
*/
static int dasd_ioctl_read_profile(struct dasd_block *block, void __user *argp)
{
- if (dasd_profile_level == DASD_PROFILE_OFF)
+ struct dasd_profile_info_t *data;
+
+ data = kmalloc(sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ spin_lock_bh(&block->profile.lock);
+ if (block->profile.data) {
+ data->dasd_io_reqs = block->profile.data->dasd_io_reqs;
+ data->dasd_io_sects = block->profile.data->dasd_io_sects;
+ memcpy(data->dasd_io_secs, block->profile.data->dasd_io_secs,
+ sizeof(data->dasd_io_secs));
+ memcpy(data->dasd_io_times, block->profile.data->dasd_io_times,
+ sizeof(data->dasd_io_times));
+ memcpy(data->dasd_io_timps, block->profile.data->dasd_io_timps,
+ sizeof(data->dasd_io_timps));
+ memcpy(data->dasd_io_time1, block->profile.data->dasd_io_time1,
+ sizeof(data->dasd_io_time1));
+ memcpy(data->dasd_io_time2, block->profile.data->dasd_io_time2,
+ sizeof(data->dasd_io_time2));
+ memcpy(data->dasd_io_time2ps,
+ block->profile.data->dasd_io_time2ps,
+ sizeof(data->dasd_io_time2ps));
+ memcpy(data->dasd_io_time3, block->profile.data->dasd_io_time3,
+ sizeof(data->dasd_io_time3));
+ memcpy(data->dasd_io_nr_req,
+ block->profile.data->dasd_io_nr_req,
+ sizeof(data->dasd_io_nr_req));
+ spin_unlock_bh(&block->profile.lock);
+ } else {
+ spin_unlock_bh(&block->profile.lock);
return -EIO;
- if (copy_to_user(argp, &block->profile,
- sizeof(struct dasd_profile_info_t)))
+ }
+ if (copy_to_user(argp, data, sizeof(*data)))
return -EFAULT;
return 0;
}
diff --git a/drivers/s390/block/dasd_proc.c b/drivers/s390/block/dasd_proc.c
index c4a6a31bd9c..6c3c5364d08 100644
--- a/drivers/s390/block/dasd_proc.c
+++ b/drivers/s390/block/dasd_proc.c
@@ -32,28 +32,6 @@ static struct proc_dir_entry *dasd_proc_root_entry = NULL;
static struct proc_dir_entry *dasd_devices_entry = NULL;
static struct proc_dir_entry *dasd_statistics_entry = NULL;
-#ifdef CONFIG_DASD_PROFILE
-static char *
-dasd_get_user_string(const char __user *user_buf, size_t user_len)
-{
- char *buffer;
-
- buffer = kmalloc(user_len + 1, GFP_KERNEL);
- if (buffer == NULL)
- return ERR_PTR(-ENOMEM);
- if (copy_from_user(buffer, user_buf, user_len) != 0) {
- kfree(buffer);
- return ERR_PTR(-EFAULT);
- }
- /* got the string, now strip linefeed. */
- if (buffer[user_len - 1] == '\n')
- buffer[user_len - 1] = 0;
- else
- buffer[user_len] = 0;
- return buffer;
-}
-#endif /* CONFIG_DASD_PROFILE */
-
static int
dasd_devices_show(struct seq_file *m, void *v)
{
@@ -167,6 +145,55 @@ static const struct file_operations dasd_devices_file_ops = {
};
#ifdef CONFIG_DASD_PROFILE
+static int dasd_stats_all_block_on(void)
+{
+ int i, rc;
+ struct dasd_device *device;
+
+ rc = 0;
+ for (i = 0; i < dasd_max_devindex; ++i) {
+ device = dasd_device_from_devindex(i);
+ if (IS_ERR(device))
+ continue;
+ if (device->block)
+ rc = dasd_profile_on(&device->block->profile);
+ dasd_put_device(device);
+ if (rc)
+ return rc;
+ }
+ return 0;
+}
+
+static void dasd_stats_all_block_off(void)
+{
+ int i;
+ struct dasd_device *device;
+
+ for (i = 0; i < dasd_max_devindex; ++i) {
+ device = dasd_device_from_devindex(i);
+ if (IS_ERR(device))
+ continue;
+ if (device->block)
+ dasd_profile_off(&device->block->profile);
+ dasd_put_device(device);
+ }
+}
+
+static void dasd_stats_all_block_reset(void)
+{
+ int i;
+ struct dasd_device *device;
+
+ for (i = 0; i < dasd_max_devindex; ++i) {
+ device = dasd_device_from_devindex(i);
+ if (IS_ERR(device))
+ continue;
+ if (device->block)
+ dasd_profile_reset(&device->block->profile);
+ dasd_put_device(device);
+ }
+}
+
static void dasd_statistics_array(struct seq_file *m, unsigned int *array, int factor)
{
int i;
@@ -183,18 +210,18 @@ static void dasd_statistics_array(struct seq_file *m, unsigned int *array, int f
static int dasd_stats_proc_show(struct seq_file *m, void *v)
{
#ifdef CONFIG_DASD_PROFILE
- struct dasd_profile_info_t *prof;
+ struct dasd_profile_info *prof;
int factor;
/* check for active profiling */
- if (dasd_profile_level == DASD_PROFILE_OFF) {
+ if (!dasd_global_profile_level) {
seq_printf(m, "Statistics are off - they might be "
"switched on using 'echo set on > "
"/proc/dasd/statistics'\n");
return 0;
}
+ prof = &dasd_global_profile_data;
- prof = &dasd_global_profile;
/* prevent counter 'overflow' on output */
for (factor = 1; (prof->dasd_io_reqs / factor) > 9999999;
factor *= 10);
@@ -245,6 +272,7 @@ static ssize_t dasd_stats_proc_write(struct file *file,
{
#ifdef CONFIG_DASD_PROFILE
char *buffer, *str;
+ int rc;
if (user_len > 65536)
user_len = 65536;
@@ -259,32 +287,40 @@ static ssize_t dasd_stats_proc_write(struct file *file,
str = skip_spaces(str + 4);
if (strcmp(str, "on") == 0) {
/* switch on statistics profiling */
- dasd_profile_level = DASD_PROFILE_ON;
+ rc = dasd_stats_all_block_on();
+ if (rc) {
+ dasd_stats_all_block_off();
+ goto out_error;
+ }
+ dasd_global_profile_reset();
+ dasd_global_profile_level = DASD_PROFILE_ON;
pr_info("The statistics feature has been switched "
"on\n");
} else if (strcmp(str, "off") == 0) {
/* switch off and reset statistics profiling */
- memset(&dasd_global_profile,
- 0, sizeof (struct dasd_profile_info_t));
- dasd_profile_level = DASD_PROFILE_OFF;
+ dasd_global_profile_level = DASD_PROFILE_OFF;
+ dasd_global_profile_reset();
+ dasd_stats_all_block_off();
pr_info("The statistics feature has been switched "
"off\n");
} else
- goto out_error;
+ goto out_parse_error;
} else if (strncmp(str, "reset", 5) == 0) {
/* reset the statistics */
- memset(&dasd_global_profile, 0,
- sizeof (struct dasd_profile_info_t));
+ dasd_global_profile_reset();
+ dasd_stats_all_block_reset();
pr_info("The statistics have been reset\n");
} else
- goto out_error;
+ goto out_parse_error;
kfree(buffer);
return user_len;
-out_error:
+out_parse_error:
+ rc = -EINVAL;
pr_warning("%s is not a supported value for /proc/dasd/statistics\n",
str);
+out_error:
kfree(buffer);
- return -EINVAL;
+ return rc;
#else
pr_warning("/proc/dasd/statistics: is not activated in this kernel\n");
return user_len;
diff --git a/drivers/s390/char/Kconfig b/drivers/s390/char/Kconfig
index a4f117d9fdc..2c9a776bd63 100644
--- a/drivers/s390/char/Kconfig
+++ b/drivers/s390/char/Kconfig
@@ -116,9 +116,6 @@ config S390_TAPE
called tape390 and include all selected interfaces and
hardware drivers.
-comment "S/390 tape interface support"
- depends on S390_TAPE
-
comment "S/390 tape hardware support"
depends on S390_TAPE
diff --git a/drivers/s390/cio/qdio_thinint.c b/drivers/s390/cio/qdio_thinint.c
index 5c4e741d822..68be6e15712 100644
--- a/drivers/s390/cio/qdio_thinint.c
+++ b/drivers/s390/cio/qdio_thinint.c
@@ -95,9 +95,11 @@ void tiqdio_remove_input_queues(struct qdio_irq *irq_ptr)
}
}
-static inline u32 shared_ind_set(void)
+static inline u32 clear_shared_ind(void)
{
- return q_indicators[TIQDIO_SHARED_IND].ind;
+ if (!atomic_read(&q_indicators[TIQDIO_SHARED_IND].count))
+ return 0;
+ return xchg(&q_indicators[TIQDIO_SHARED_IND].ind, 0);
}
/**
@@ -107,7 +109,7 @@ static inline u32 shared_ind_set(void)
*/
static void tiqdio_thinint_handler(void *alsi, void *data)
{
- u32 si_used = shared_ind_set();
+ u32 si_used = clear_shared_ind();
struct qdio_q *q;
last_ai_time = S390_lowcore.int_clock;
@@ -150,13 +152,6 @@ static void tiqdio_thinint_handler(void *alsi, void *data)
qperf_inc(q, adapter_int);
}
rcu_read_unlock();
-
- /*
- * If the shared indicator was used clear it now after all queues
- * were processed.
- */
- if (si_used && shared_ind_set())
- xchg(&q_indicators[TIQDIO_SHARED_IND].ind, 0);
}
static int set_subchannel_ind(struct qdio_irq *irq_ptr, int reset)
diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c
index 16e4a25596e..f8134a44cef 100644
--- a/drivers/s390/crypto/ap_bus.c
+++ b/drivers/s390/crypto/ap_bus.c
@@ -6,6 +6,7 @@
* Martin Schwidefsky <schwidefsky@de.ibm.com>
* Ralph Wuerthner <rwuerthn@de.ibm.com>
* Felix Beck <felix.beck@de.ibm.com>
+ * Holger Dengler <hd@linux.vnet.ibm.com>
*
* Adjunct processor bus.
*
@@ -222,47 +223,52 @@ ap_queue_interruption_control(ap_qid_t qid, void *ind)
}
#endif
-static inline struct ap_queue_status __ap_4096_commands_available(ap_qid_t qid,
- int *support)
+#ifdef CONFIG_64BIT
+static inline struct ap_queue_status
+__ap_query_functions(ap_qid_t qid, unsigned int *functions)
{
register unsigned long reg0 asm ("0") = 0UL | qid | (1UL << 23);
- register struct ap_queue_status reg1 asm ("1");
- register unsigned long reg2 asm ("2") = 0UL;
+ register struct ap_queue_status reg1 asm ("1") = AP_QUEUE_STATUS_INVALID;
+ register unsigned long reg2 asm ("2");
asm volatile(
".long 0xb2af0000\n"
- "0: la %1,0\n"
- "1:\n"
- EX_TABLE(0b, 1b)
- : "+d" (reg0), "=d" (reg1), "=d" (reg2)
+ "0:\n"
+ EX_TABLE(0b, 0b)
+ : "+d" (reg0), "+d" (reg1), "=d" (reg2)
:
: "cc");
- if (reg2 & 0x6000000000000000ULL)
- *support = 1;
- else
- *support = 0;
-
+ *functions = (unsigned int)(reg2 >> 32);
return reg1;
}
+#endif
/**
- * ap_4096_commands_availablen(): Check for availability of 4096 bit RSA
- * support.
+ * ap_query_functions(): Query supported functions.
* @qid: The AP queue number
+ * @functions: Pointer to functions field.
*
- * Returns 1 if 4096 bit RSA keys are support fo the AP, returns 0 if not.
+ * Returns
+ * 0 on success.
+ * -ENODEV if queue not valid.
+ * -EBUSY if device busy.
+ * -EINVAL if query function is not supported
*/
-int ap_4096_commands_available(ap_qid_t qid)
+static int ap_query_functions(ap_qid_t qid, unsigned int *functions)
{
+#ifdef CONFIG_64BIT
struct ap_queue_status status;
- int i, support = 0;
- status = __ap_4096_commands_available(qid, &support);
+ int i;
+ status = __ap_query_functions(qid, functions);
for (i = 0; i < AP_MAX_RESET; i++) {
+ if (ap_queue_status_invalid_test(&status))
+ return -ENODEV;
+
switch (status.response_code) {
case AP_RESPONSE_NORMAL:
- return support;
+ return 0;
case AP_RESPONSE_RESET_IN_PROGRESS:
case AP_RESPONSE_BUSY:
break;
@@ -270,7 +276,7 @@ int ap_4096_commands_available(ap_qid_t qid)
case AP_RESPONSE_DECONFIGURED:
case AP_RESPONSE_CHECKSTOPPED:
case AP_RESPONSE_INVALID_ADDRESS:
- return 0;
+ return -ENODEV;
case AP_RESPONSE_OTHERWISE_CHANGED:
break;
default:
@@ -278,10 +284,31 @@ int ap_4096_commands_available(ap_qid_t qid)
}
if (i < AP_MAX_RESET - 1) {
udelay(5);
- status = __ap_4096_commands_available(qid, &support);
+ status = __ap_query_functions(qid, functions);
}
}
- return support;
+ return -EBUSY;
+#else
+ return -EINVAL;
+#endif
+}
+
+/**
+ * ap_4096_commands_availablen(): Check for availability of 4096 bit RSA
+ * support.
+ * @qid: The AP queue number
+ *
+ * Returns 1 if 4096 bit RSA keys are support fo the AP, returns 0 if not.
+ */
+int ap_4096_commands_available(ap_qid_t qid)
+{
+ unsigned int functions;
+
+ if (ap_query_functions(qid, &functions))
+ return 0;
+
+ return test_ap_facility(functions, 1) &&
+ test_ap_facility(functions, 2);
}
EXPORT_SYMBOL(ap_4096_commands_available);
@@ -1135,6 +1162,7 @@ static void ap_scan_bus(struct work_struct *unused)
struct device *dev;
ap_qid_t qid;
int queue_depth, device_type;
+ unsigned int device_functions;
int rc, i;
if (ap_select_domain() != 0)
@@ -1183,14 +1211,30 @@ static void ap_scan_bus(struct work_struct *unused)
INIT_LIST_HEAD(&ap_dev->list);
setup_timer(&ap_dev->timeout, ap_request_timeout,
(unsigned long) ap_dev);
- if (device_type == 0) {
+ switch (device_type) {
+ case 0:
if (ap_probe_device_type(ap_dev)) {
kfree(ap_dev);
continue;
}
- }
- else
+ break;
+ case 10:
+ if (ap_query_functions(qid, &device_functions)) {
+ kfree(ap_dev);
+ continue;
+ }
+ if (test_ap_facility(device_functions, 3))
+ ap_dev->device_type = AP_DEVICE_TYPE_CEX3C;
+ else if (test_ap_facility(device_functions, 4))
+ ap_dev->device_type = AP_DEVICE_TYPE_CEX3A;
+ else {
+ kfree(ap_dev);
+ continue;
+ }
+ break;
+ default:
ap_dev->device_type = device_type;
+ }
ap_dev->device.bus = &ap_bus_type;
ap_dev->device.parent = ap_root_device;
diff --git a/drivers/s390/crypto/ap_bus.h b/drivers/s390/crypto/ap_bus.h
index 08b9738285b..d960a6309ee 100644
--- a/drivers/s390/crypto/ap_bus.h
+++ b/drivers/s390/crypto/ap_bus.h
@@ -6,6 +6,7 @@
* Martin Schwidefsky <schwidefsky@de.ibm.com>
* Ralph Wuerthner <rwuerthn@de.ibm.com>
* Felix Beck <felix.beck@de.ibm.com>
+ * Holger Dengler <hd@linux.vnet.ibm.com>
*
* Adjunct processor bus header file.
*
@@ -72,7 +73,26 @@ struct ap_queue_status {
unsigned int int_enabled : 1;
unsigned int response_code : 8;
unsigned int pad2 : 16;
-};
+} __packed;
+
+#define AP_QUEUE_STATUS_INVALID \
+ { 1, 1, 1, 0xF, 1, 0xFF, 0xFFFF }
+
+static inline
+int ap_queue_status_invalid_test(struct ap_queue_status *status)
+{
+ struct ap_queue_status invalid = AP_QUEUE_STATUS_INVALID;
+ return !(memcmp(status, &invalid, sizeof(struct ap_queue_status)));
+}
+
+#define MAX_AP_FACILITY 31
+
+static inline int test_ap_facility(unsigned int function, unsigned int nr)
+{
+ if (nr > MAX_AP_FACILITY)
+ return 0;
+ return function & (unsigned int)(0x80000000 >> nr);
+}
#define AP_RESPONSE_NORMAL 0x00
#define AP_RESPONSE_Q_NOT_AVAIL 0x01