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authorLinus Torvalds <torvalds@linux-foundation.org>2017-07-04 01:39:36 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2017-07-04 01:39:36 +0300
commite0f3e8f14da868047c524a0cf11e08b95fd1b008 (patch)
tree34dbd1fcd3b1b0631b235831ab672562bdc6de8f /drivers/s390
parente5859eb84576ce7a0d95be6224d2e269c8daa741 (diff)
parent9e293b5a7062981016ace93160c56a980fcb73b8 (diff)
downloadlinux-e0f3e8f14da868047c524a0cf11e08b95fd1b008.tar.xz
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 updates from Martin Schwidefsky: "The bulk of the s390 patches for 4.13. Some new things but mostly bug fixes and cleanups. Noteworthy changes: - The SCM block driver is converted to blk-mq - Switch s390 to 5 level page tables. The virtual address space for a user space process can now have up to 16EB-4KB. - Introduce a ELF phdr flag for qemu to avoid the global vm.alloc_pgste which forces all processes to large page tables - A couple of PCI improvements to improve error recovery - Included is the merge of the base support for proper machine checks for KVM" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (52 commits) s390/dasd: Fix faulty ENODEV for RO sysfs attribute s390/pci: recognize name clashes with uids s390/pci: provide more debug information s390/pci: fix handling of PEC 306 s390/pci: improve pci hotplug s390/pci: introduce clp_get_state s390/pci: improve error handling during fmb (de)registration s390/pci: improve unreg_ioat error handling s390/pci: improve error handling during interrupt deregistration s390/pci: don't cleanup in arch_setup_msi_irqs KVM: s390: Backup the guest's machine check info s390/nmi: s390: New low level handling for machine check happening in guest s390/fpu: export save_fpu_regs for all configs s390/kvm: avoid global config of vm.alloc_pgste=1 s390: rename struct psw_bits members s390: rename psw_bits enums s390/mm: use correct address space when enabling DAT s390/cio: introduce io_subchannel_type s390/ipl: revert Load Normal semantics for LPAR CCW-type re-IPL s390/dumpstack: remove raw stack dump ...
Diffstat (limited to 'drivers/s390')
-rw-r--r--drivers/s390/block/Kconfig7
-rw-r--r--drivers/s390/block/Makefile3
-rw-r--r--drivers/s390/block/dasd.c76
-rw-r--r--drivers/s390/block/dasd_devmap.c75
-rw-r--r--drivers/s390/block/scm_blk.c262
-rw-r--r--drivers/s390/block/scm_blk.h60
-rw-r--r--drivers/s390/block/scm_blk_cluster.c255
-rw-r--r--drivers/s390/cio/css.c49
-rw-r--r--drivers/s390/cio/device.c42
-rw-r--r--drivers/s390/cio/vfio_ccw_drv.c58
-rw-r--r--drivers/s390/crypto/ap_bus.c21
-rw-r--r--drivers/s390/crypto/pkey_api.c6
-rw-r--r--drivers/s390/crypto/zcrypt_api.c12
-rw-r--r--drivers/s390/crypto/zcrypt_cca_key.h115
-rw-r--r--drivers/s390/crypto/zcrypt_msgtype6.c4
15 files changed, 302 insertions, 743 deletions
diff --git a/drivers/s390/block/Kconfig b/drivers/s390/block/Kconfig
index 0acb8c2f9475..31f014b57bfc 100644
--- a/drivers/s390/block/Kconfig
+++ b/drivers/s390/block/Kconfig
@@ -82,10 +82,3 @@ config SCM_BLOCK
To compile this driver as a module, choose M here: the
module will be called scm_block.
-
-config SCM_BLOCK_CLUSTER_WRITE
- def_bool y
- prompt "SCM force cluster writes"
- depends on SCM_BLOCK
- help
- Force writes to Storage Class Memory (SCM) to be in done in clusters.
diff --git a/drivers/s390/block/Makefile b/drivers/s390/block/Makefile
index c2f4e673e031..b64e2b32c753 100644
--- a/drivers/s390/block/Makefile
+++ b/drivers/s390/block/Makefile
@@ -19,7 +19,4 @@ obj-$(CONFIG_BLK_DEV_XPRAM) += xpram.o
obj-$(CONFIG_DCSSBLK) += dcssblk.o
scm_block-objs := scm_drv.o scm_blk.o
-ifdef CONFIG_SCM_BLOCK_CLUSTER_WRITE
-scm_block-objs += scm_blk_cluster.o
-endif
obj-$(CONFIG_SCM_BLOCK) += scm_block.o
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index b7cbd5d2cdea..0f1fe4ff7f51 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -1965,8 +1965,12 @@ static int __dasd_device_is_unusable(struct dasd_device *device,
{
int mask = ~(DASD_STOPPED_DC_WAIT | DASD_UNRESUMED_PM);
- if (test_bit(DASD_FLAG_OFFLINE, &device->flags)) {
- /* dasd is being set offline. */
+ if (test_bit(DASD_FLAG_OFFLINE, &device->flags) &&
+ !test_bit(DASD_FLAG_SAFE_OFFLINE_RUNNING, &device->flags)) {
+ /*
+ * dasd is being set offline
+ * but it is no safe offline where we have to allow I/O
+ */
return 1;
}
if (device->stopped) {
@@ -3570,57 +3574,69 @@ int dasd_generic_set_offline(struct ccw_device *cdev)
else
pr_warn("%s: The DASD cannot be set offline while it is in use\n",
dev_name(&cdev->dev));
- clear_bit(DASD_FLAG_OFFLINE, &device->flags);
- goto out_busy;
+ rc = -EBUSY;
+ goto out_err;
}
}
- if (test_bit(DASD_FLAG_SAFE_OFFLINE_RUNNING, &device->flags)) {
- /*
- * safe offline already running
- * could only be called by normal offline so safe_offline flag
- * needs to be removed to run normal offline and kill all I/O
- */
- if (test_and_set_bit(DASD_FLAG_OFFLINE, &device->flags))
- /* Already doing normal offline processing */
- goto out_busy;
- else
- clear_bit(DASD_FLAG_SAFE_OFFLINE, &device->flags);
- } else {
- if (test_bit(DASD_FLAG_OFFLINE, &device->flags))
- /* Already doing offline processing */
- goto out_busy;
+ /*
+ * Test if the offline processing is already running and exit if so.
+ * If a safe offline is being processed this could only be a normal
+ * offline that should be able to overtake the safe offline and
+ * cancel any I/O we do not want to wait for any longer
+ */
+ if (test_bit(DASD_FLAG_OFFLINE, &device->flags)) {
+ if (test_bit(DASD_FLAG_SAFE_OFFLINE_RUNNING, &device->flags)) {
+ clear_bit(DASD_FLAG_SAFE_OFFLINE_RUNNING,
+ &device->flags);
+ } else {
+ rc = -EBUSY;
+ goto out_err;
+ }
}
-
set_bit(DASD_FLAG_OFFLINE, &device->flags);
- spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
/*
- * if safe_offline called set safe_offline_running flag and
+ * if safe_offline is called set safe_offline_running flag and
* clear safe_offline so that a call to normal offline
* can overrun safe_offline processing
*/
if (test_and_clear_bit(DASD_FLAG_SAFE_OFFLINE, &device->flags) &&
!test_and_set_bit(DASD_FLAG_SAFE_OFFLINE_RUNNING, &device->flags)) {
+ /* need to unlock here to wait for outstanding I/O */
+ spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
/*
* If we want to set the device safe offline all IO operations
* should be finished before continuing the offline process
* so sync bdev first and then wait for our queues to become
* empty
*/
- /* sync blockdev and partitions */
if (device->block) {
rc = fsync_bdev(device->block->bdev);
if (rc != 0)
goto interrupted;
}
- /* schedule device tasklet and wait for completion */
dasd_schedule_device_bh(device);
rc = wait_event_interruptible(shutdown_waitq,
_wait_for_empty_queues(device));
if (rc != 0)
goto interrupted;
+
+ /*
+ * check if a normal offline process overtook the offline
+ * processing in this case simply do nothing beside returning
+ * that we got interrupted
+ * otherwise mark safe offline as not running any longer and
+ * continue with normal offline
+ */
+ spin_lock_irqsave(get_ccwdev_lock(cdev), flags);
+ if (!test_bit(DASD_FLAG_SAFE_OFFLINE_RUNNING, &device->flags)) {
+ rc = -ERESTARTSYS;
+ goto out_err;
+ }
+ clear_bit(DASD_FLAG_SAFE_OFFLINE_RUNNING, &device->flags);
}
+ spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
dasd_set_target_state(device, DASD_STATE_NEW);
/* dasd_delete_device destroys the device reference. */
@@ -3632,22 +3648,18 @@ int dasd_generic_set_offline(struct ccw_device *cdev)
*/
if (block)
dasd_free_block(block);
+
return 0;
interrupted:
/* interrupted by signal */
- clear_bit(DASD_FLAG_SAFE_OFFLINE, &device->flags);
+ spin_lock_irqsave(get_ccwdev_lock(cdev), flags);
clear_bit(DASD_FLAG_SAFE_OFFLINE_RUNNING, &device->flags);
clear_bit(DASD_FLAG_OFFLINE, &device->flags);
- dasd_put_device(device);
-
- return rc;
-
-out_busy:
+out_err:
dasd_put_device(device);
spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
-
- return -EBUSY;
+ return rc;
}
EXPORT_SYMBOL_GPL(dasd_generic_set_offline);
diff --git a/drivers/s390/block/dasd_devmap.c b/drivers/s390/block/dasd_devmap.c
index 1164b51d09f3..7c7351276d2e 100644
--- a/drivers/s390/block/dasd_devmap.c
+++ b/drivers/s390/block/dasd_devmap.c
@@ -315,45 +315,58 @@ static int __init dasd_parse_range(const char *range)
char *features_str = NULL;
char *from_str = NULL;
char *to_str = NULL;
- size_t len = strlen(range) + 1;
- char tmp[len];
+ int rc = 0;
+ char *tmp;
- strlcpy(tmp, range, len);
+ tmp = kstrdup(range, GFP_KERNEL);
+ if (!tmp)
+ return -ENOMEM;
- if (dasd_evaluate_range_param(tmp, &from_str, &to_str, &features_str))
- goto out_err;
+ if (dasd_evaluate_range_param(tmp, &from_str, &to_str, &features_str)) {
+ rc = -EINVAL;
+ goto out;
+ }
- if (dasd_busid(from_str, &from_id0, &from_id1, &from))
- goto out_err;
+ if (dasd_busid(from_str, &from_id0, &from_id1, &from)) {
+ rc = -EINVAL;
+ goto out;
+ }
to = from;
to_id0 = from_id0;
to_id1 = from_id1;
if (to_str) {
- if (dasd_busid(to_str, &to_id0, &to_id1, &to))
- goto out_err;
+ if (dasd_busid(to_str, &to_id0, &to_id1, &to)) {
+ rc = -EINVAL;
+ goto out;
+ }
if (from_id0 != to_id0 || from_id1 != to_id1 || from > to) {
pr_err("%s is not a valid device range\n", range);
- goto out_err;
+ rc = -EINVAL;
+ goto out;
}
}
features = dasd_feature_list(features_str);
- if (features < 0)
- goto out_err;
+ if (features < 0) {
+ rc = -EINVAL;
+ goto out;
+ }
/* each device in dasd= parameter should be set initially online */
features |= DASD_FEATURE_INITIAL_ONLINE;
while (from <= to) {
sprintf(bus_id, "%01x.%01x.%04x", from_id0, from_id1, from++);
devmap = dasd_add_busid(bus_id, features);
- if (IS_ERR(devmap))
- return PTR_ERR(devmap);
+ if (IS_ERR(devmap)) {
+ rc = PTR_ERR(devmap);
+ goto out;
+ }
}
- return 0;
+out:
+ kfree(tmp);
-out_err:
- return -EINVAL;
+ return rc;
}
/*
@@ -735,13 +748,22 @@ static ssize_t
dasd_ro_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct dasd_devmap *devmap;
- int ro_flag;
+ struct dasd_device *device;
+ int ro_flag = 0;
devmap = dasd_find_busid(dev_name(dev));
- if (!IS_ERR(devmap))
- ro_flag = (devmap->features & DASD_FEATURE_READONLY) != 0;
- else
- ro_flag = (DASD_FEATURE_DEFAULT & DASD_FEATURE_READONLY) != 0;
+ if (IS_ERR(devmap))
+ goto out;
+
+ ro_flag = !!(devmap->features & DASD_FEATURE_READONLY);
+
+ spin_lock(&dasd_devmap_lock);
+ device = devmap->device;
+ if (device)
+ ro_flag |= test_bit(DASD_FLAG_DEVICE_RO, &device->flags);
+ spin_unlock(&dasd_devmap_lock);
+
+out:
return snprintf(buf, PAGE_SIZE, ro_flag ? "1\n" : "0\n");
}
@@ -764,7 +786,7 @@ dasd_ro_store(struct device *dev, struct device_attribute *attr,
device = dasd_device_from_cdev(cdev);
if (IS_ERR(device))
- return PTR_ERR(device);
+ return count;
spin_lock_irqsave(get_ccwdev_lock(cdev), flags);
val = val || test_bit(DASD_FLAG_DEVICE_RO, &device->flags);
@@ -928,11 +950,14 @@ dasd_safe_offline_store(struct device *dev, struct device_attribute *attr,
{
struct ccw_device *cdev = to_ccwdev(dev);
struct dasd_device *device;
+ unsigned long flags;
int rc;
- device = dasd_device_from_cdev(cdev);
+ spin_lock_irqsave(get_ccwdev_lock(cdev), flags);
+ device = dasd_device_from_cdev_locked(cdev);
if (IS_ERR(device)) {
rc = PTR_ERR(device);
+ spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
goto out;
}
@@ -940,12 +965,14 @@ dasd_safe_offline_store(struct device *dev, struct device_attribute *attr,
test_bit(DASD_FLAG_SAFE_OFFLINE_RUNNING, &device->flags)) {
/* Already doing offline processing */
dasd_put_device(device);
+ spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
rc = -EBUSY;
goto out;
}
set_bit(DASD_FLAG_SAFE_OFFLINE, &device->flags);
dasd_put_device(device);
+ spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
rc = ccw_device_set_offline(cdev);
diff --git a/drivers/s390/block/scm_blk.c b/drivers/s390/block/scm_blk.c
index 3c2c84b72877..42018a20f2b7 100644
--- a/drivers/s390/block/scm_blk.c
+++ b/drivers/s390/block/scm_blk.c
@@ -13,6 +13,7 @@
#include <linux/mempool.h>
#include <linux/module.h>
#include <linux/blkdev.h>
+#include <linux/blk-mq.h>
#include <linux/genhd.h>
#include <linux/slab.h>
#include <linux/list.h>
@@ -42,7 +43,6 @@ static void __scm_free_rq(struct scm_request *scmrq)
struct aob_rq_header *aobrq = to_aobrq(scmrq);
free_page((unsigned long) scmrq->aob);
- __scm_free_rq_cluster(scmrq);
kfree(scmrq->request);
kfree(aobrq);
}
@@ -82,9 +82,6 @@ static int __scm_alloc_rq(void)
if (!scmrq->request)
goto free;
- if (__scm_alloc_rq_cluster(scmrq))
- goto free;
-
INIT_LIST_HEAD(&scmrq->list);
spin_lock_irq(&list_lock);
list_add(&scmrq->list, &inactive_requests);
@@ -114,13 +111,13 @@ static struct scm_request *scm_request_fetch(void)
{
struct scm_request *scmrq = NULL;
- spin_lock(&list_lock);
+ spin_lock_irq(&list_lock);
if (list_empty(&inactive_requests))
goto out;
scmrq = list_first_entry(&inactive_requests, struct scm_request, list);
list_del(&scmrq->list);
out:
- spin_unlock(&list_lock);
+ spin_unlock_irq(&list_lock);
return scmrq;
}
@@ -234,130 +231,123 @@ static inline void scm_request_init(struct scm_blk_dev *bdev,
scmrq->error = BLK_STS_OK;
/* We don't use all msbs - place aidaws at the end of the aob page. */
scmrq->next_aidaw = (void *) &aob->msb[nr_requests_per_io];
- scm_request_cluster_init(scmrq);
}
-static void scm_ensure_queue_restart(struct scm_blk_dev *bdev)
-{
- if (atomic_read(&bdev->queued_reqs)) {
- /* Queue restart is triggered by the next interrupt. */
- return;
- }
- blk_delay_queue(bdev->rq, SCM_QUEUE_DELAY);
-}
-
-void scm_request_requeue(struct scm_request *scmrq)
+static void scm_request_requeue(struct scm_request *scmrq)
{
struct scm_blk_dev *bdev = scmrq->bdev;
int i;
- scm_release_cluster(scmrq);
for (i = 0; i < nr_requests_per_io && scmrq->request[i]; i++)
- blk_requeue_request(bdev->rq, scmrq->request[i]);
+ blk_mq_requeue_request(scmrq->request[i], false);
atomic_dec(&bdev->queued_reqs);
scm_request_done(scmrq);
- scm_ensure_queue_restart(bdev);
+ blk_mq_kick_requeue_list(bdev->rq);
}
-void scm_request_finish(struct scm_request *scmrq)
+static void scm_request_finish(struct scm_request *scmrq)
{
struct scm_blk_dev *bdev = scmrq->bdev;
int i;
- scm_release_cluster(scmrq);
- for (i = 0; i < nr_requests_per_io && scmrq->request[i]; i++)
- blk_end_request_all(scmrq->request[i], scmrq->error);
+ for (i = 0; i < nr_requests_per_io && scmrq->request[i]; i++) {
+ if (scmrq->error)
+ blk_mq_end_request(scmrq->request[i], scmrq->error);
+ else
+ blk_mq_complete_request(scmrq->request[i]);
+ }
atomic_dec(&bdev->queued_reqs);
scm_request_done(scmrq);
}
-static int scm_request_start(struct scm_request *scmrq)
+static void scm_request_start(struct scm_request *scmrq)
{
struct scm_blk_dev *bdev = scmrq->bdev;
- int ret;
atomic_inc(&bdev->queued_reqs);
- if (!scmrq->aob->request.msb_count) {
- scm_request_requeue(scmrq);
- return -EINVAL;
- }
-
- ret = eadm_start_aob(scmrq->aob);
- if (ret) {
+ if (eadm_start_aob(scmrq->aob)) {
SCM_LOG(5, "no subchannel");
scm_request_requeue(scmrq);
}
- return ret;
}
-static void scm_blk_request(struct request_queue *rq)
+struct scm_queue {
+ struct scm_request *scmrq;
+ spinlock_t lock;
+};
+
+static int scm_blk_request(struct blk_mq_hw_ctx *hctx,
+ const struct blk_mq_queue_data *qd)
{
- struct scm_device *scmdev = rq->queuedata;
+ struct scm_device *scmdev = hctx->queue->queuedata;
struct scm_blk_dev *bdev = dev_get_drvdata(&scmdev->dev);
- struct scm_request *scmrq = NULL;
- struct request *req;
+ struct scm_queue *sq = hctx->driver_data;
+ struct request *req = qd->rq;
+ struct scm_request *scmrq;
- while ((req = blk_peek_request(rq))) {
- if (!scm_permit_request(bdev, req))
- goto out;
+ spin_lock(&sq->lock);
+ if (!scm_permit_request(bdev, req)) {
+ spin_unlock(&sq->lock);
+ return BLK_MQ_RQ_QUEUE_BUSY;
+ }
+ scmrq = sq->scmrq;
+ if (!scmrq) {
+ scmrq = scm_request_fetch();
if (!scmrq) {
- scmrq = scm_request_fetch();
- if (!scmrq) {
- SCM_LOG(5, "no request");
- goto out;
- }
- scm_request_init(bdev, scmrq);
+ SCM_LOG(5, "no request");
+ spin_unlock(&sq->lock);
+ return BLK_MQ_RQ_QUEUE_BUSY;
}
- scm_request_set(scmrq, req);
+ scm_request_init(bdev, scmrq);
+ sq->scmrq = scmrq;
+ }
+ scm_request_set(scmrq, req);
- if (!scm_reserve_cluster(scmrq)) {
- SCM_LOG(5, "cluster busy");
- scm_request_set(scmrq, NULL);
- if (scmrq->aob->request.msb_count)
- goto out;
+ if (scm_request_prepare(scmrq)) {
+ SCM_LOG(5, "aidaw alloc failed");
+ scm_request_set(scmrq, NULL);
- scm_request_done(scmrq);
- return;
- }
+ if (scmrq->aob->request.msb_count)
+ scm_request_start(scmrq);
- if (scm_need_cluster_request(scmrq)) {
- if (scmrq->aob->request.msb_count) {
- /* Start cluster requests separately. */
- scm_request_set(scmrq, NULL);
- if (scm_request_start(scmrq))
- return;
- } else {
- atomic_inc(&bdev->queued_reqs);
- blk_start_request(req);
- scm_initiate_cluster_request(scmrq);
- }
- scmrq = NULL;
- continue;
- }
+ sq->scmrq = NULL;
+ spin_unlock(&sq->lock);
+ return BLK_MQ_RQ_QUEUE_BUSY;
+ }
+ blk_mq_start_request(req);
- if (scm_request_prepare(scmrq)) {
- SCM_LOG(5, "aidaw alloc failed");
- scm_request_set(scmrq, NULL);
- goto out;
- }
- blk_start_request(req);
+ if (qd->last || scmrq->aob->request.msb_count == nr_requests_per_io) {
+ scm_request_start(scmrq);
+ sq->scmrq = NULL;
+ }
+ spin_unlock(&sq->lock);
+ return BLK_MQ_RQ_QUEUE_OK;
+}
- if (scmrq->aob->request.msb_count < nr_requests_per_io)
- continue;
+static int scm_blk_init_hctx(struct blk_mq_hw_ctx *hctx, void *data,
+ unsigned int idx)
+{
+ struct scm_queue *qd = kzalloc(sizeof(*qd), GFP_KERNEL);
- if (scm_request_start(scmrq))
- return;
+ if (!qd)
+ return -ENOMEM;
- scmrq = NULL;
- }
-out:
- if (scmrq)
- scm_request_start(scmrq);
- else
- scm_ensure_queue_restart(bdev);
+ spin_lock_init(&qd->lock);
+ hctx->driver_data = qd;
+
+ return 0;
+}
+
+static void scm_blk_exit_hctx(struct blk_mq_hw_ctx *hctx, unsigned int idx)
+{
+ struct scm_queue *qd = hctx->driver_data;
+
+ WARN_ON(qd->scmrq);
+ kfree(hctx->driver_data);
+ hctx->driver_data = NULL;
}
static void __scmrq_log_error(struct scm_request *scmrq)
@@ -377,21 +367,6 @@ static void __scmrq_log_error(struct scm_request *scmrq)
scmrq->error);
}
-void scm_blk_irq(struct scm_device *scmdev, void *data, blk_status_t error)
-{
- struct scm_request *scmrq = data;
- struct scm_blk_dev *bdev = scmrq->bdev;
-
- scmrq->error = error;
- if (error)
- __scmrq_log_error(scmrq);
-
- spin_lock(&bdev->lock);
- list_add_tail(&scmrq->list, &bdev->finished_requests);
- spin_unlock(&bdev->lock);
- tasklet_hi_schedule(&bdev->tasklet);
-}
-
static void scm_blk_handle_error(struct scm_request *scmrq)
{
struct scm_blk_dev *bdev = scmrq->bdev;
@@ -419,54 +394,46 @@ restart:
return;
requeue:
- spin_lock_irqsave(&bdev->rq_lock, flags);
scm_request_requeue(scmrq);
- spin_unlock_irqrestore(&bdev->rq_lock, flags);
}
-static void scm_blk_tasklet(struct scm_blk_dev *bdev)
+void scm_blk_irq(struct scm_device *scmdev, void *data, blk_status_t error)
{
- struct scm_request *scmrq;
- unsigned long flags;
-
- spin_lock_irqsave(&bdev->lock, flags);
- while (!list_empty(&bdev->finished_requests)) {
- scmrq = list_first_entry(&bdev->finished_requests,
- struct scm_request, list);
- list_del(&scmrq->list);
- spin_unlock_irqrestore(&bdev->lock, flags);
+ struct scm_request *scmrq = data;
- if (scmrq->error && scmrq->retries-- > 0) {
+ scmrq->error = error;
+ if (error) {
+ __scmrq_log_error(scmrq);
+ if (scmrq->retries-- > 0) {
scm_blk_handle_error(scmrq);
-
- /* Request restarted or requeued, handle next. */
- spin_lock_irqsave(&bdev->lock, flags);
- continue;
+ return;
}
+ }
- if (scm_test_cluster_request(scmrq)) {
- scm_cluster_request_irq(scmrq);
- spin_lock_irqsave(&bdev->lock, flags);
- continue;
- }
+ scm_request_finish(scmrq);
+}
- scm_request_finish(scmrq);
- spin_lock_irqsave(&bdev->lock, flags);
- }
- spin_unlock_irqrestore(&bdev->lock, flags);
- /* Look out for more requests. */
- blk_run_queue(bdev->rq);
+static void scm_blk_request_done(struct request *req)
+{
+ blk_mq_end_request(req, 0);
}
static const struct block_device_operations scm_blk_devops = {
.owner = THIS_MODULE,
};
+static const struct blk_mq_ops scm_mq_ops = {
+ .queue_rq = scm_blk_request,
+ .complete = scm_blk_request_done,
+ .init_hctx = scm_blk_init_hctx,
+ .exit_hctx = scm_blk_exit_hctx,
+};
+
int scm_blk_dev_setup(struct scm_blk_dev *bdev, struct scm_device *scmdev)
{
- struct request_queue *rq;
- int len, ret = -ENOMEM;
unsigned int devindex, nr_max_blk;
+ struct request_queue *rq;
+ int len, ret;
devindex = atomic_inc_return(&nr_devices) - 1;
/* scma..scmz + scmaa..scmzz */
@@ -477,18 +444,23 @@ int scm_blk_dev_setup(struct scm_blk_dev *bdev, struct scm_device *scmdev)
bdev->scmdev = scmdev;
bdev->state = SCM_OPER;
- spin_lock_init(&bdev->rq_lock);
spin_lock_init(&bdev->lock);
- INIT_LIST_HEAD(&bdev->finished_requests);
atomic_set(&bdev->queued_reqs, 0);
- tasklet_init(&bdev->tasklet,
- (void (*)(unsigned long)) scm_blk_tasklet,
- (unsigned long) bdev);
- rq = blk_init_queue(scm_blk_request, &bdev->rq_lock);
- if (!rq)
+ bdev->tag_set.ops = &scm_mq_ops;
+ bdev->tag_set.nr_hw_queues = nr_requests;
+ bdev->tag_set.queue_depth = nr_requests_per_io * nr_requests;
+ bdev->tag_set.flags = BLK_MQ_F_SHOULD_MERGE;
+
+ ret = blk_mq_alloc_tag_set(&bdev->tag_set);
+ if (ret)
goto out;
+ rq = blk_mq_init_queue(&bdev->tag_set);
+ if (IS_ERR(rq)) {
+ ret = PTR_ERR(rq);
+ goto out_tag;
+ }
bdev->rq = rq;
nr_max_blk = min(scmdev->nr_max_block,
(unsigned int) (PAGE_SIZE / sizeof(struct aidaw)));
@@ -498,12 +470,12 @@ int scm_blk_dev_setup(struct scm_blk_dev *bdev, struct scm_device *scmdev)
blk_queue_max_segments(rq, nr_max_blk);
queue_flag_set_unlocked(QUEUE_FLAG_NONROT, rq);
queue_flag_clear_unlocked(QUEUE_FLAG_ADD_RANDOM, rq);
- scm_blk_dev_cluster_setup(bdev);
bdev->gendisk = alloc_disk(SCM_NR_PARTS);
- if (!bdev->gendisk)
+ if (!bdev->gendisk) {
+ ret = -ENOMEM;
goto out_queue;
-
+ }
rq->queuedata = scmdev;
bdev->gendisk->private_data = scmdev;
bdev->gendisk->fops = &scm_blk_devops;
@@ -528,6 +500,8 @@ int scm_blk_dev_setup(struct scm_blk_dev *bdev, struct scm_device *scmdev)
out_queue:
blk_cleanup_queue(rq);
+out_tag:
+ blk_mq_free_tag_set(&bdev->tag_set);
out:
atomic_dec(&nr_devices);
return ret;
@@ -535,9 +509,9 @@ out:
void scm_blk_dev_cleanup(struct scm_blk_dev *bdev)
{
- tasklet_kill(&bdev->tasklet);
del_gendisk(bdev->gendisk);
blk_cleanup_queue(bdev->gendisk->queue);
+ blk_mq_free_tag_set(&bdev->tag_set);
put_disk(bdev->gendisk);
}
@@ -558,7 +532,7 @@ static bool __init scm_blk_params_valid(void)
if (!nr_requests_per_io || nr_requests_per_io > 64)
return false;
- return scm_cluster_size_valid();
+ return true;
}
static int __init scm_blk_init(void)
diff --git a/drivers/s390/block/scm_blk.h b/drivers/s390/block/scm_blk.h
index cd598d1a4eae..71288dd9dd7f 100644
--- a/drivers/s390/block/scm_blk.h
+++ b/drivers/s390/block/scm_blk.h
@@ -4,6 +4,7 @@
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/blkdev.h>
+#include <linux/blk-mq.h>
#include <linux/genhd.h>
#include <linux/list.h>
@@ -14,18 +15,14 @@
#define SCM_QUEUE_DELAY 5
struct scm_blk_dev {
- struct tasklet_struct tasklet;
struct request_queue *rq;
struct gendisk *gendisk;
+ struct blk_mq_tag_set tag_set;
struct scm_device *scmdev;
- spinlock_t rq_lock; /* guard the request queue */
- spinlock_t lock; /* guard the rest of the blockdev */
+ spinlock_t lock;
atomic_t queued_reqs;
enum {SCM_OPER, SCM_WR_PROHIBIT} state;
struct list_head finished_requests;
-#ifdef CONFIG_SCM_BLOCK_CLUSTER_WRITE
- struct list_head cluster_list;
-#endif
};
struct scm_request {
@@ -36,13 +33,6 @@ struct scm_request {
struct list_head list;
u8 retries;
blk_status_t error;
-#ifdef CONFIG_SCM_BLOCK_CLUSTER_WRITE
- struct {
- enum {CLUSTER_NONE, CLUSTER_READ, CLUSTER_WRITE} state;
- struct list_head list;
- void **buf;
- } cluster;
-#endif
};
#define to_aobrq(rq) container_of((void *) rq, struct aob_rq_header, data)
@@ -52,55 +42,11 @@ void scm_blk_dev_cleanup(struct scm_blk_dev *);
void scm_blk_set_available(struct scm_blk_dev *);
void scm_blk_irq(struct scm_device *, void *, blk_status_t);
-void scm_request_finish(struct scm_request *);
-void scm_request_requeue(struct scm_request *);
-
struct aidaw *scm_aidaw_fetch(struct scm_request *scmrq, unsigned int bytes);
int scm_drv_init(void);
void scm_drv_cleanup(void);
-#ifdef CONFIG_SCM_BLOCK_CLUSTER_WRITE
-void __scm_free_rq_cluster(struct scm_request *);
-int __scm_alloc_rq_cluster(struct scm_request *);
-void scm_request_cluster_init(struct scm_request *);
-bool scm_reserve_cluster(struct scm_request *);
-void scm_release_cluster(struct scm_request *);
-void scm_blk_dev_cluster_setup(struct scm_blk_dev *);
-bool scm_need_cluster_request(struct scm_request *);
-void scm_initiate_cluster_request(struct scm_request *);
-void scm_cluster_request_irq(struct scm_request *);
-bool scm_test_cluster_request(struct scm_request *);
-bool scm_cluster_size_valid(void);
-#else /* CONFIG_SCM_BLOCK_CLUSTER_WRITE */
-static inline void __scm_free_rq_cluster(struct scm_request *scmrq) {}
-static inline int __scm_alloc_rq_cluster(struct scm_request *scmrq)
-{
- return 0;
-}
-static inline void scm_request_cluster_init(struct scm_request *scmrq) {}
-static inline bool scm_reserve_cluster(struct scm_request *scmrq)
-{
- return true;
-}
-static inline void scm_release_cluster(struct scm_request *scmrq) {}
-static inline void scm_blk_dev_cluster_setup(struct scm_blk_dev *bdev) {}
-static inline bool scm_need_cluster_request(struct scm_request *scmrq)
-{
- return false;
-}
-static inline void scm_initiate_cluster_request(struct scm_request *scmrq) {}
-static inline void scm_cluster_request_irq(struct scm_request *scmrq) {}
-static inline bool scm_test_cluster_request(struct scm_request *scmrq)
-{
- return false;
-}
-static inline bool scm_cluster_size_valid(void)
-{
- return true;
-}
-#endif /* CONFIG_SCM_BLOCK_CLUSTER_WRITE */
-
extern debug_info_t *scm_debug;
#define SCM_LOG(imp, txt) do { \
diff --git a/drivers/s390/block/scm_blk_cluster.c b/drivers/s390/block/scm_blk_cluster.c
deleted file mode 100644
index 7497ddde2dd6..000000000000
--- a/drivers/s390/block/scm_blk_cluster.c
+++ /dev/null
@@ -1,255 +0,0 @@
-/*
- * Block driver for s390 storage class memory.
- *
- * Copyright IBM Corp. 2012
- * Author(s): Sebastian Ott <sebott@linux.vnet.ibm.com>
- */
-
-#include <linux/spinlock.h>
-#include <linux/module.h>
-#include <linux/blkdev.h>
-#include <linux/genhd.h>
-#include <linux/slab.h>
-#include <linux/list.h>
-#include <asm/eadm.h>
-#include "scm_blk.h"
-
-static unsigned int write_cluster_size = 64;
-module_param(write_cluster_size, uint, S_IRUGO);
-MODULE_PARM_DESC(write_cluster_size,
- "Number of pages used for contiguous writes.");
-
-#define CLUSTER_SIZE (write_cluster_size * PAGE_SIZE)
-
-void __scm_free_rq_cluster(struct scm_request *scmrq)
-{
- int i;
-
- if (!scmrq->cluster.buf)
- return;
-
- for (i = 0; i < 2 * write_cluster_size; i++)
- free_page((unsigned long) scmrq->cluster.buf[i]);
-
- kfree(scmrq->cluster.buf);
-}
-
-int __scm_alloc_rq_cluster(struct scm_request *scmrq)
-{
- int i;
-
- scmrq->cluster.buf = kzalloc(sizeof(void *) * 2 * write_cluster_size,
- GFP_KERNEL);
- if (!scmrq->cluster.buf)
- return -ENOMEM;
-
- for (i = 0; i < 2 * write_cluster_size; i++) {
- scmrq->cluster.buf[i] = (void *) get_zeroed_page(GFP_DMA);
- if (!scmrq->cluster.buf[i])
- return -ENOMEM;
- }
- INIT_LIST_HEAD(&scmrq->cluster.list);
- return 0;
-}
-
-void scm_request_cluster_init(struct scm_request *scmrq)
-{
- scmrq->cluster.state = CLUSTER_NONE;
-}
-
-static bool clusters_intersect(struct request *A, struct request *B)
-{
- unsigned long firstA, lastA, firstB, lastB;
-
- firstA = ((u64) blk_rq_pos(A) << 9) / CLUSTER_SIZE;
- lastA = (((u64) blk_rq_pos(A) << 9) +
- blk_rq_bytes(A) - 1) / CLUSTER_SIZE;
-
- firstB = ((u64) blk_rq_pos(B) << 9) / CLUSTER_SIZE;
- lastB = (((u64) blk_rq_pos(B) << 9) +
- blk_rq_bytes(B) - 1) / CLUSTER_SIZE;
-
- return (firstB <= lastA && firstA <= lastB);
-}
-
-bool scm_reserve_cluster(struct scm_request *scmrq)
-{
- struct request *req = scmrq->request[scmrq->aob->request.msb_count];
- struct scm_blk_dev *bdev = scmrq->bdev;
- struct scm_request *iter;
- int pos, add = 1;
-
- if (write_cluster_size == 0)
- return true;
-
- spin_lock(&bdev->lock);
- list_for_each_entry(iter, &bdev->cluster_list, cluster.list) {
- if (iter == scmrq) {
- /*
- * We don't have to use clusters_intersect here, since
- * cluster requests are always started separately.
- */
- add = 0;
- continue;
- }
- for (pos = 0; pos < iter->aob->request.msb_count; pos++) {
- if (clusters_intersect(req, iter->request[pos]) &&
- (rq_data_dir(req) == WRITE ||
- rq_data_dir(iter->request[pos]) == WRITE)) {
- spin_unlock(&bdev->lock);
- return false;
- }
- }
- }
- if (add)
- list_add(&scmrq->cluster.list, &bdev->cluster_list);
- spin_unlock(&bdev->lock);
-
- return true;
-}
-
-void scm_release_cluster(struct scm_request *scmrq)
-{
- struct scm_blk_dev *bdev = scmrq->bdev;
- unsigned long flags;
-
- if (write_cluster_size == 0)
- return;
-
- spin_lock_irqsave(&bdev->lock, flags);
- list_del(&scmrq->cluster.list);
- spin_unlock_irqrestore(&bdev->lock, flags);
-}
-
-void scm_blk_dev_cluster_setup(struct scm_blk_dev *bdev)
-{
- INIT_LIST_HEAD(&bdev->cluster_list);
- blk_queue_io_opt(bdev->rq, CLUSTER_SIZE);
-}
-
-static int scm_prepare_cluster_request(struct scm_request *scmrq)
-{
- struct scm_blk_dev *bdev = scmrq->bdev;
- struct scm_device *scmdev = bdev->gendisk->private_data;
- struct request *req = scmrq->request[0];
- struct msb *msb = &scmrq->aob->msb[0];
- struct req_iterator iter;
- struct aidaw *aidaw;
- struct bio_vec bv;
- int i = 0;
- u64 addr;
-
- switch (scmrq->cluster.state) {
- case CLUSTER_NONE:
- scmrq->cluster.state = CLUSTER_READ;
- /* fall through */
- case CLUSTER_READ:
- msb->bs = MSB_BS_4K;
- msb->oc = MSB_OC_READ;
- msb->flags = MSB_FLAG_IDA;
- msb->blk_count = write_cluster_size;
-
- addr = scmdev->address + ((u64) blk_rq_pos(req) << 9);
- msb->scm_addr = round_down(addr, CLUSTER_SIZE);
-
- if (msb->scm_addr !=
- round_down(addr + (u64) blk_rq_bytes(req) - 1,
- CLUSTER_SIZE))
- msb->blk_count = 2 * write_cluster_size;
-
- aidaw = scm_aidaw_fetch(scmrq, msb->blk_count * PAGE_SIZE);
- if (!aidaw)
- return -ENOMEM;
-
- scmrq->aob->request.msb_count = 1;
- msb->data_addr = (u64) aidaw;
- for (i = 0; i < msb->blk_count; i++) {
- aidaw->data_addr = (u64) scmrq->cluster.buf[i];
- aidaw++;
- }
-
- break;
- case CLUSTER_WRITE:
- aidaw = (void *) msb->data_addr;
- msb->oc = MSB_OC_WRITE;
-
- for (addr = msb->scm_addr;
- addr < scmdev->address + ((u64) blk_rq_pos(req) << 9);
- addr += PAGE_SIZE) {
- aidaw->data_addr = (u64) scmrq->cluster.buf[i];
- aidaw++;
- i++;
- }
- rq_for_each_segment(bv, req, iter) {
- aidaw->data_addr = (u64) page_address(bv.bv_page);
- aidaw++;
- i++;
- }
- for (; i < msb->blk_count; i++) {
- aidaw->data_addr = (u64) scmrq->cluster.buf[i];
- aidaw++;
- }
- break;
- }
- return 0;
-}
-
-bool scm_need_cluster_request(struct scm_request *scmrq)
-{
- int pos = scmrq->aob->request.msb_count;
-
- if (rq_data_dir(scmrq->request[pos]) == READ)
- return false;
-
- return blk_rq_bytes(scmrq->request[pos]) < CLUSTER_SIZE;
-}
-
-/* Called with queue lock held. */
-void scm_initiate_cluster_request(struct scm_request *scmrq)
-{
- if (scm_prepare_cluster_request(scmrq))
- goto requeue;
- if (eadm_start_aob(scmrq->aob))
- goto requeue;
- return;
-requeue:
- scm_request_requeue(scmrq);
-}
-
-bool scm_test_cluster_request(struct scm_request *scmrq)
-{
- return scmrq->cluster.state != CLUSTER_NONE;
-}
-
-void scm_cluster_request_irq(struct scm_request *scmrq)
-{
- struct scm_blk_dev *bdev = scmrq->bdev;
- unsigned long flags;
-
- switch (scmrq->cluster.state) {
- case CLUSTER_NONE:
- BUG();
- break;
- case CLUSTER_READ:
- if (scmrq->error) {
- scm_request_finish(scmrq);
- break;
- }
- scmrq->cluster.state = CLUSTER_WRITE;
- spin_lock_irqsave(&bdev->rq_lock, flags);
- scm_initiate_cluster_request(scmrq);
- spin_unlock_irqrestore(&bdev->rq_lock, flags);
- break;
- case CLUSTER_WRITE:
- scm_request_finish(scmrq);
- break;
- }
-}
-
-bool scm_cluster_size_valid(void)
-{
- if (write_cluster_size == 1 || write_cluster_size > 128)
- return false;
-
- return !(write_cluster_size & (write_cluster_size - 1));
-}
diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c
index e2aa944eb566..d3e504c3c362 100644
--- a/drivers/s390/cio/css.c
+++ b/drivers/s390/cio/css.c
@@ -296,6 +296,51 @@ static const struct attribute_group *default_subch_attr_groups[] = {
NULL,
};
+static ssize_t chpids_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct subchannel *sch = to_subchannel(dev);
+ struct chsc_ssd_info *ssd = &sch->ssd_info;
+ ssize_t ret = 0;
+ int mask;
+ int chp;
+
+ for (chp = 0; chp < 8; chp++) {
+ mask = 0x80 >> chp;
+ if (ssd->path_mask & mask)
+ ret += sprintf(buf + ret, "%02x ", ssd->chpid[chp].id);
+ else
+ ret += sprintf(buf + ret, "00 ");
+ }
+ ret += sprintf(buf + ret, "\n");
+ return ret;
+}
+static DEVICE_ATTR(chpids, 0444, chpids_show, NULL);
+
+static ssize_t pimpampom_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct subchannel *sch = to_subchannel(dev);
+ struct pmcw *pmcw = &sch->schib.pmcw;
+
+ return sprintf(buf, "%02x %02x %02x\n",
+ pmcw->pim, pmcw->pam, pmcw->pom);
+}
+static DEVICE_ATTR(pimpampom, 0444, pimpampom_show, NULL);
+
+static struct attribute *io_subchannel_type_attrs[] = {
+ &dev_attr_chpids.attr,
+ &dev_attr_pimpampom.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(io_subchannel_type);
+
+static const struct device_type io_subchannel_type = {
+ .groups = io_subchannel_type_groups,
+};
+
int css_register_subchannel(struct subchannel *sch)
{
int ret;
@@ -304,6 +349,10 @@ int css_register_subchannel(struct subchannel *sch)
sch->dev.parent = &channel_subsystems[0]->device;
sch->dev.bus = &css_bus_type;
sch->dev.groups = default_subch_attr_groups;
+
+ if (sch->st == SUBCHANNEL_TYPE_IO)
+ sch->dev.type = &io_subchannel_type;
+
/*
* We don't want to generate uevents for I/O subchannels that don't
* have a working ccw device behind them since they will be
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index b8006ea9099c..7be01a58b44f 100644
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -208,44 +208,6 @@ int __init io_subchannel_init(void)
/************************ device handling **************************/
-/*
- * A ccw_device has some interfaces in sysfs in addition to the
- * standard ones.
- * The following entries are designed to export the information which
- * resided in 2.4 in /proc/subchannels. Subchannel and device number
- * are obvious, so they don't have an entry :)
- * TODO: Split chpids and pimpampom up? Where is "in use" in the tree?
- */
-static ssize_t
-chpids_show (struct device * dev, struct device_attribute *attr, char * buf)
-{
- struct subchannel *sch = to_subchannel(dev);
- struct chsc_ssd_info *ssd = &sch->ssd_info;
- ssize_t ret = 0;
- int chp;
- int mask;
-
- for (chp = 0; chp < 8; chp++) {
- mask = 0x80 >> chp;
- if (ssd->path_mask & mask)
- ret += sprintf(buf + ret, "%02x ", ssd->chpid[chp].id);
- else
- ret += sprintf(buf + ret, "00 ");
- }
- ret += sprintf (buf+ret, "\n");
- return min((ssize_t)PAGE_SIZE, ret);
-}
-
-static ssize_t
-pimpampom_show (struct device * dev, struct device_attribute *attr, char * buf)
-{
- struct subchannel *sch = to_subchannel(dev);
- struct pmcw *pmcw = &sch->schib.pmcw;
-
- return sprintf (buf, "%02x %02x %02x\n",
- pmcw->pim, pmcw->pam, pmcw->pom);
-}
-
static ssize_t
devtype_show (struct device *dev, struct device_attribute *attr, char *buf)
{
@@ -636,8 +598,6 @@ static ssize_t vpm_show(struct device *dev, struct device_attribute *attr,
return sprintf(buf, "%02x\n", sch->vpm);
}
-static DEVICE_ATTR(chpids, 0444, chpids_show, NULL);
-static DEVICE_ATTR(pimpampom, 0444, pimpampom_show, NULL);
static DEVICE_ATTR(devtype, 0444, devtype_show, NULL);
static DEVICE_ATTR(cutype, 0444, cutype_show, NULL);
static DEVICE_ATTR(modalias, 0444, modalias_show, NULL);
@@ -647,8 +607,6 @@ static DEVICE_ATTR(logging, 0200, NULL, initiate_logging);
static DEVICE_ATTR(vpm, 0444, vpm_show, NULL);
static struct attribute *io_subchannel_attrs[] = {
- &dev_attr_chpids.attr,
- &dev_attr_pimpampom.attr,
&dev_attr_logging.attr,
&dev_attr_vpm.attr,
NULL,
diff --git a/drivers/s390/cio/vfio_ccw_drv.c b/drivers/s390/cio/vfio_ccw_drv.c
index e90dd43d2a55..a25367ebaa89 100644
--- a/drivers/s390/cio/vfio_ccw_drv.c
+++ b/drivers/s390/cio/vfio_ccw_drv.c
@@ -90,54 +90,6 @@ static void vfio_ccw_sch_io_todo(struct work_struct *work)
}
/*
- * Sysfs interfaces
- */
-static ssize_t chpids_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct subchannel *sch = to_subchannel(dev);
- struct chsc_ssd_info *ssd = &sch->ssd_info;
- ssize_t ret = 0;
- int chp;
- int mask;
-
- for (chp = 0; chp < 8; chp++) {
- mask = 0x80 >> chp;
- if (ssd->path_mask & mask)
- ret += sprintf(buf + ret, "%02x ", ssd->chpid[chp].id);
- else
- ret += sprintf(buf + ret, "00 ");
- }
- ret += sprintf(buf+ret, "\n");
- return ret;
-}
-
-static ssize_t pimpampom_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct subchannel *sch = to_subchannel(dev);
- struct pmcw *pmcw = &sch->schib.pmcw;
-
- return sprintf(buf, "%02x %02x %02x\n",
- pmcw->pim, pmcw->pam, pmcw->pom);
-}
-
-static DEVICE_ATTR(chpids, 0444, chpids_show, NULL);
-static DEVICE_ATTR(pimpampom, 0444, pimpampom_show, NULL);
-
-static struct attribute *vfio_subchannel_attrs[] = {
- &dev_attr_chpids.attr,
- &dev_attr_pimpampom.attr,
- NULL,
-};
-
-static struct attribute_group vfio_subchannel_attr_group = {
- .attrs = vfio_subchannel_attrs,
-};
-
-/*
* Css driver callbacks
*/
static void vfio_ccw_sch_irq(struct subchannel *sch)
@@ -174,13 +126,9 @@ static int vfio_ccw_sch_probe(struct subchannel *sch)
if (ret)
goto out_free;
- ret = sysfs_create_group(&sch->dev.kobj, &vfio_subchannel_attr_group);
- if (ret)
- goto out_disable;
-
ret = vfio_ccw_mdev_reg(sch);
if (ret)
- goto out_rm_group;
+ goto out_disable;
INIT_WORK(&private->io_work, vfio_ccw_sch_io_todo);
atomic_set(&private->avail, 1);
@@ -188,8 +136,6 @@ static int vfio_ccw_sch_probe(struct subchannel *sch)
return 0;
-out_rm_group:
- sysfs_remove_group(&sch->dev.kobj, &vfio_subchannel_attr_group);
out_disable:
cio_disable_subchannel(sch);
out_free:
@@ -206,8 +152,6 @@ static int vfio_ccw_sch_remove(struct subchannel *sch)
vfio_ccw_mdev_unreg(sch);
- sysfs_remove_group(&sch->dev.kobj, &vfio_subchannel_attr_group);
-
dev_set_drvdata(&sch->dev, NULL);
kfree(private);
diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c
index ea099910b4e9..6dee598979e7 100644
--- a/drivers/s390/crypto/ap_bus.c
+++ b/drivers/s390/crypto/ap_bus.c
@@ -766,7 +766,7 @@ static ssize_t ap_domain_store(struct bus_type *bus,
ap_domain_index = domain;
spin_unlock_bh(&ap_domain_lock);
- AP_DBF(DBF_DEBUG, "store new default domain=%d\n", domain);
+ AP_DBF(DBF_DEBUG, "stored new default domain=%d\n", domain);
return count;
}
@@ -952,6 +952,7 @@ static int ap_select_domain(void)
}
if (best_domain >= 0){
ap_domain_index = best_domain;
+ AP_DBF(DBF_DEBUG, "new ap_domain_index=%d\n", ap_domain_index);
spin_unlock_bh(&ap_domain_lock);
return 0;
}
@@ -988,7 +989,7 @@ static void ap_scan_bus(struct work_struct *unused)
ap_qid_t qid;
int depth = 0, type = 0;
unsigned int functions = 0;
- int rc, id, dom, borked, domains;
+ int rc, id, dom, borked, domains, defdomdevs = 0;
AP_DBF(DBF_DEBUG, "ap_scan_bus running\n");
@@ -1052,6 +1053,8 @@ static void ap_scan_bus(struct work_struct *unused)
put_device(dev);
if (!borked) {
domains++;
+ if (dom == ap_domain_index)
+ defdomdevs++;
continue;
}
}
@@ -1098,6 +1101,8 @@ static void ap_scan_bus(struct work_struct *unused)
continue;
}
domains++;
+ if (dom == ap_domain_index)
+ defdomdevs++;
} /* end domain loop */
if (ac) {
/* remove card dev if there are no queue devices */
@@ -1106,6 +1111,11 @@ static void ap_scan_bus(struct work_struct *unused)
put_device(&ac->ap_dev.device);
}
} /* end device loop */
+
+ if (defdomdevs < 1)
+ AP_DBF(DBF_INFO, "no queue device with default domain %d available\n",
+ ap_domain_index);
+
out:
mod_timer(&ap_config_timer, jiffies + ap_config_time * HZ);
}
@@ -1174,14 +1184,14 @@ int __init ap_module_init(void)
ap_init_configuration();
if (ap_configuration)
- max_domain_id = ap_max_domain_id ? : (AP_DOMAINS - 1);
+ max_domain_id =
+ ap_max_domain_id ? ap_max_domain_id : AP_DOMAINS - 1;
else
max_domain_id = 15;
if (ap_domain_index < -1 || ap_domain_index > max_domain_id) {
pr_warn("%d is not a valid cryptographic domain\n",
ap_domain_index);
- rc = -EINVAL;
- goto out_free;
+ ap_domain_index = -1;
}
/* In resume callback we need to know if the user had set the domain.
* If so, we can not just reset it.
@@ -1254,7 +1264,6 @@ out:
unregister_reset_call(&ap_reset_call);
if (ap_using_interrupts())
unregister_adapter_interrupt(&ap_airq);
-out_free:
kfree(ap_configuration);
return rc;
}
diff --git a/drivers/s390/crypto/pkey_api.c b/drivers/s390/crypto/pkey_api.c
index ea86da8c75f9..f61fa47135a6 100644
--- a/drivers/s390/crypto/pkey_api.c
+++ b/drivers/s390/crypto/pkey_api.c
@@ -178,9 +178,9 @@ static inline void prep_xcrb(struct ica_xcRB *pxcrb,
pxcrb->user_defined = (cardnr == 0xFFFF ? AUTOSELECT : cardnr);
pxcrb->request_control_blk_length =
preqcblk->cprb_len + preqcblk->req_parml;
- pxcrb->request_control_blk_addr = (void *) preqcblk;
+ pxcrb->request_control_blk_addr = (void __user *) preqcblk;
pxcrb->reply_control_blk_length = preqcblk->rpl_msgbl;
- pxcrb->reply_control_blk_addr = (void *) prepcblk;
+ pxcrb->reply_control_blk_addr = (void __user *) prepcblk;
}
/*
@@ -1194,7 +1194,7 @@ static struct miscdevice pkey_dev = {
/*
* Module init
*/
-int __init pkey_init(void)
+static int __init pkey_init(void)
{
cpacf_mask_t pckmo_functions;
diff --git a/drivers/s390/crypto/zcrypt_api.c b/drivers/s390/crypto/zcrypt_api.c
index 93015f85d4a6..b1c27e28859b 100644
--- a/drivers/s390/crypto/zcrypt_api.c
+++ b/drivers/s390/crypto/zcrypt_api.c
@@ -821,8 +821,10 @@ static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
do {
rc = zcrypt_rsa_modexpo(&mex);
} while (rc == -EAGAIN);
- if (rc)
+ if (rc) {
+ ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSAMODEXPO rc=%d", rc);
return rc;
+ }
return put_user(mex.outputdatalength, &umex->outputdatalength);
}
case ICARSACRT: {
@@ -838,8 +840,10 @@ static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
do {
rc = zcrypt_rsa_crt(&crt);
} while (rc == -EAGAIN);
- if (rc)
+ if (rc) {
+ ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSACRT rc=%d", rc);
return rc;
+ }
return put_user(crt.outputdatalength, &ucrt->outputdatalength);
}
case ZSECSENDCPRB: {
@@ -855,6 +859,8 @@ static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
do {
rc = zcrypt_send_cprb(&xcRB);
} while (rc == -EAGAIN);
+ if (rc)
+ ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDCPRB rc=%d", rc);
if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB)))
return -EFAULT;
return rc;
@@ -872,6 +878,8 @@ static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
do {
rc = zcrypt_send_ep11_cprb(&xcrb);
} while (rc == -EAGAIN);
+ if (rc)
+ ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDEP11CPRB rc=%d", rc);
if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
return -EFAULT;
return rc;
diff --git a/drivers/s390/crypto/zcrypt_cca_key.h b/drivers/s390/crypto/zcrypt_cca_key.h
index ca0cdbe46368..12cff6262566 100644
--- a/drivers/s390/crypto/zcrypt_cca_key.h
+++ b/drivers/s390/crypto/zcrypt_cca_key.h
@@ -48,26 +48,6 @@ struct cca_token_hdr {
#define CCA_TKN_HDR_ID_EXT 0x1E
-/**
- * mapping for the cca private ME section
- */
-struct cca_private_ext_ME_sec {
- unsigned char section_identifier;
- unsigned char version;
- unsigned short section_length;
- unsigned char private_key_hash[20];
- unsigned char reserved1[4];
- unsigned char key_format;
- unsigned char reserved2;
- unsigned char key_name_hash[20];
- unsigned char key_use_flags[4];
- unsigned char reserved3[6];
- unsigned char reserved4[24];
- unsigned char confounder[24];
- unsigned char exponent[128];
- unsigned char modulus[128];
-} __attribute__((packed));
-
#define CCA_PVT_USAGE_ALL 0x80
/**
@@ -124,77 +104,6 @@ struct cca_pvt_ext_CRT_sec {
#define CCA_PVT_EXT_CRT_SEC_FMT_CL 0x40
/**
- * Set up private key fields of a type6 MEX message.
- * Note that all numerics in the key token are big-endian,
- * while the entries in the key block header are little-endian.
- *
- * @mex: pointer to user input data
- * @p: pointer to memory area for the key
- *
- * Returns the size of the key area or -EFAULT
- */
-static inline int zcrypt_type6_mex_key_de(struct ica_rsa_modexpo *mex,
- void *p, int big_endian)
-{
- static struct cca_token_hdr static_pvt_me_hdr = {
- .token_identifier = 0x1E,
- .token_length = 0x0183,
- };
- static struct cca_private_ext_ME_sec static_pvt_me_sec = {
- .section_identifier = 0x02,
- .section_length = 0x016C,
- .key_use_flags = {0x80,0x00,0x00,0x00},
- };
- static struct cca_public_sec static_pub_me_sec = {
- .section_identifier = 0x04,
- .section_length = 0x000F,
- .exponent_len = 0x0003,
- };
- static char pk_exponent[3] = { 0x01, 0x00, 0x01 };
- struct {
- struct T6_keyBlock_hdr t6_hdr;
- struct cca_token_hdr pvtMeHdr;
- struct cca_private_ext_ME_sec pvtMeSec;
- struct cca_public_sec pubMeSec;
- char exponent[3];
- } __attribute__((packed)) *key = p;
- unsigned char *temp;
-
- memset(key, 0, sizeof(*key));
-
- if (big_endian) {
- key->t6_hdr.blen = cpu_to_be16(0x189);
- key->t6_hdr.ulen = cpu_to_be16(0x189 - 2);
- } else {
- key->t6_hdr.blen = cpu_to_le16(0x189);
- key->t6_hdr.ulen = cpu_to_le16(0x189 - 2);
- }
- key->pvtMeHdr = static_pvt_me_hdr;
- key->pvtMeSec = static_pvt_me_sec;
- key->pubMeSec = static_pub_me_sec;
- /*
- * In a private key, the modulus doesn't appear in the public
- * section. So, an arbitrary public exponent of 0x010001 will be
- * used.
- */
- memcpy(key->exponent, pk_exponent, 3);
-
- /* key parameter block */
- temp = key->pvtMeSec.exponent +
- sizeof(key->pvtMeSec.exponent) - mex->inputdatalength;
- if (copy_from_user(temp, mex->b_key, mex->inputdatalength))
- return -EFAULT;
-
- /* modulus */
- temp = key->pvtMeSec.modulus +
- sizeof(key->pvtMeSec.modulus) - mex->inputdatalength;
- if (copy_from_user(temp, mex->n_modulus, mex->inputdatalength))
- return -EFAULT;
- key->pubMeSec.modulus_bit_len = 8 * mex->inputdatalength;
- return sizeof(*key);
-}
-
-/**
* Set up private key fields of a type6 MEX message. The _pad variant
* strips leading zeroes from the b_key.
* Note that all numerics in the key token are big-endian,
@@ -205,8 +114,7 @@ static inline int zcrypt_type6_mex_key_de(struct ica_rsa_modexpo *mex,
*
* Returns the size of the key area or -EFAULT
*/
-static inline int zcrypt_type6_mex_key_en(struct ica_rsa_modexpo *mex,
- void *p, int big_endian)
+static inline int zcrypt_type6_mex_key_en(struct ica_rsa_modexpo *mex, void *p)
{
static struct cca_token_hdr static_pub_hdr = {
.token_identifier = 0x1E,
@@ -251,13 +159,8 @@ static inline int zcrypt_type6_mex_key_en(struct ica_rsa_modexpo *mex,
2*mex->inputdatalength - i;
key->pubHdr.token_length =
key->pubSec.section_length + sizeof(key->pubHdr);
- if (big_endian) {
- key->t6_hdr.ulen = cpu_to_be16(key->pubHdr.token_length + 4);
- key->t6_hdr.blen = cpu_to_be16(key->pubHdr.token_length + 6);
- } else {
- key->t6_hdr.ulen = cpu_to_le16(key->pubHdr.token_length + 4);
- key->t6_hdr.blen = cpu_to_le16(key->pubHdr.token_length + 6);
- }
+ key->t6_hdr.ulen = key->pubHdr.token_length + 4;
+ key->t6_hdr.blen = key->pubHdr.token_length + 6;
return sizeof(*key) + 2*mex->inputdatalength - i;
}
@@ -271,8 +174,7 @@ static inline int zcrypt_type6_mex_key_en(struct ica_rsa_modexpo *mex,
*
* Returns the size of the key area or -EFAULT
*/
-static inline int zcrypt_type6_crt_key(struct ica_rsa_modexpo_crt *crt,
- void *p, int big_endian)
+static inline int zcrypt_type6_crt_key(struct ica_rsa_modexpo_crt *crt, void *p)
{
static struct cca_public_sec static_cca_pub_sec = {
.section_identifier = 4,
@@ -298,13 +200,8 @@ static inline int zcrypt_type6_crt_key(struct ica_rsa_modexpo_crt *crt,
size = sizeof(*key) + key_len + sizeof(*pub) + 3;
/* parameter block.key block */
- if (big_endian) {
- key->t6_hdr.blen = cpu_to_be16(size);
- key->t6_hdr.ulen = cpu_to_be16(size - 2);
- } else {
- key->t6_hdr.blen = cpu_to_le16(size);
- key->t6_hdr.ulen = cpu_to_le16(size - 2);
- }
+ key->t6_hdr.blen = size;
+ key->t6_hdr.ulen = size - 2;
/* key token header */
key->token.token_identifier = CCA_TKN_HDR_ID_EXT;
diff --git a/drivers/s390/crypto/zcrypt_msgtype6.c b/drivers/s390/crypto/zcrypt_msgtype6.c
index e5563ffeb839..4fddb4319481 100644
--- a/drivers/s390/crypto/zcrypt_msgtype6.c
+++ b/drivers/s390/crypto/zcrypt_msgtype6.c
@@ -291,7 +291,7 @@ static int ICAMEX_msg_to_type6MEX_msgX(struct zcrypt_queue *zq,
return -EFAULT;
/* Set up key which is located after the variable length text. */
- size = zcrypt_type6_mex_key_en(mex, msg->text+mex->inputdatalength, 1);
+ size = zcrypt_type6_mex_key_en(mex, msg->text+mex->inputdatalength);
if (size < 0)
return size;
size += sizeof(*msg) + mex->inputdatalength;
@@ -353,7 +353,7 @@ static int ICACRT_msg_to_type6CRT_msgX(struct zcrypt_queue *zq,
return -EFAULT;
/* Set up key which is located after the variable length text. */
- size = zcrypt_type6_crt_key(crt, msg->text + crt->inputdatalength, 1);
+ size = zcrypt_type6_crt_key(crt, msg->text + crt->inputdatalength);
if (size < 0)
return size;
size += sizeof(*msg) + crt->inputdatalength; /* total size of msg */