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authorJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-11 10:41:07 +0300
committerJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-13 08:17:18 +0300
commite09b41010ba33a20a87472ee821fa407a5b8da36 (patch)
treed10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/drivers/s390/cio
parentf93b97fd65072de626c074dbe099a1fff05ce060 (diff)
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page. During the rebasing, the following patch collided: Force tick interrupt and get rid of softirq magic(I70131fb85). Collisions have been removed because its logic was found on the source already. Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769 Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/drivers/s390/cio')
-rw-r--r--kernel/drivers/s390/cio/chsc.c202
-rw-r--r--kernel/drivers/s390/cio/chsc.h15
-rw-r--r--kernel/drivers/s390/cio/cio.c47
-rw-r--r--kernel/drivers/s390/cio/cmf.c220
-rw-r--r--kernel/drivers/s390/cio/css.c7
-rw-r--r--kernel/drivers/s390/cio/device.c4
-rw-r--r--kernel/drivers/s390/cio/device.h6
-rw-r--r--kernel/drivers/s390/cio/device_fsm.c38
-rw-r--r--kernel/drivers/s390/cio/device_ops.c107
-rw-r--r--kernel/drivers/s390/cio/device_pgid.c70
-rw-r--r--kernel/drivers/s390/cio/eadm_sch.c3
-rw-r--r--kernel/drivers/s390/cio/qdio_main.c4
12 files changed, 415 insertions, 308 deletions
diff --git a/kernel/drivers/s390/cio/chsc.c b/kernel/drivers/s390/cio/chsc.c
index e3bf885f4..a831d1859 100644
--- a/kernel/drivers/s390/cio/chsc.c
+++ b/kernel/drivers/s390/cio/chsc.c
@@ -21,6 +21,7 @@
#include <asm/chsc.h>
#include <asm/crw.h>
#include <asm/isc.h>
+#include <asm/ebcdic.h>
#include "css.h"
#include "cio.h"
@@ -272,36 +273,6 @@ static void s390_process_res_acc(struct chp_link *link)
css_schedule_reprobe();
}
-static int
-__get_chpid_from_lir(void *data)
-{
- struct lir {
- u8 iq;
- u8 ic;
- u16 sci;
- /* incident-node descriptor */
- u32 indesc[28];
- /* attached-node descriptor */
- u32 andesc[28];
- /* incident-specific information */
- u32 isinfo[28];
- } __attribute__ ((packed)) *lir;
-
- lir = data;
- if (!(lir->iq&0x80))
- /* NULL link incident record */
- return -EINVAL;
- if (!(lir->indesc[0]&0xc0000000))
- /* node descriptor not valid */
- return -EINVAL;
- if (!(lir->indesc[0]&0x10000000))
- /* don't handle device-type nodes - FIXME */
- return -EINVAL;
- /* Byte 3 contains the chpid. Could also be CTCA, but we don't care */
-
- return (u16) (lir->indesc[0]&0x000000ff);
-}
-
struct chsc_sei_nt0_area {
u8 flags;
u8 vf; /* validity flags */
@@ -341,22 +312,132 @@ struct chsc_sei {
} u;
} __packed;
+/*
+ * Node Descriptor as defined in SA22-7204, "Common I/O-Device Commands"
+ */
+
+#define ND_VALIDITY_VALID 0
+#define ND_VALIDITY_OUTDATED 1
+#define ND_VALIDITY_INVALID 2
+
+struct node_descriptor {
+ /* Flags. */
+ union {
+ struct {
+ u32 validity:3;
+ u32 reserved:5;
+ } __packed;
+ u8 byte0;
+ } __packed;
+
+ /* Node parameters. */
+ u32 params:24;
+
+ /* Node ID. */
+ char type[6];
+ char model[3];
+ char manufacturer[3];
+ char plant[2];
+ char seq[12];
+ u16 tag;
+} __packed;
+
+/*
+ * Link Incident Record as defined in SA22-7202, "ESCON I/O Interface"
+ */
+
+#define LIR_IQ_CLASS_INFO 0
+#define LIR_IQ_CLASS_DEGRADED 1
+#define LIR_IQ_CLASS_NOT_OPERATIONAL 2
+
+struct lir {
+ struct {
+ u32 null:1;
+ u32 reserved:3;
+ u32 class:2;
+ u32 reserved2:2;
+ } __packed iq;
+ u32 ic:8;
+ u32 reserved:16;
+ struct node_descriptor incident_node;
+ struct node_descriptor attached_node;
+ u8 reserved2[32];
+} __packed;
+
+#define PARAMS_LEN 10 /* PARAMS=xx,xxxxxx */
+#define NODEID_LEN 35 /* NODEID=tttttt/mdl,mmm.ppssssssssssss,xxxx */
+
+/* Copy EBCIDC text, convert to ASCII and optionally add delimiter. */
+static char *store_ebcdic(char *dest, const char *src, unsigned long len,
+ char delim)
+{
+ memcpy(dest, src, len);
+ EBCASC(dest, len);
+
+ if (delim)
+ dest[len++] = delim;
+
+ return dest + len;
+}
+
+/* Format node ID and parameters for output in LIR log message. */
+static void format_node_data(char *params, char *id, struct node_descriptor *nd)
+{
+ memset(params, 0, PARAMS_LEN);
+ memset(id, 0, NODEID_LEN);
+
+ if (nd->validity != ND_VALIDITY_VALID) {
+ strncpy(params, "n/a", PARAMS_LEN - 1);
+ strncpy(id, "n/a", NODEID_LEN - 1);
+ return;
+ }
+
+ /* PARAMS=xx,xxxxxx */
+ snprintf(params, PARAMS_LEN, "%02x,%06x", nd->byte0, nd->params);
+ /* NODEID=tttttt/mdl,mmm.ppssssssssssss,xxxx */
+ id = store_ebcdic(id, nd->type, sizeof(nd->type), '/');
+ id = store_ebcdic(id, nd->model, sizeof(nd->model), ',');
+ id = store_ebcdic(id, nd->manufacturer, sizeof(nd->manufacturer), '.');
+ id = store_ebcdic(id, nd->plant, sizeof(nd->plant), 0);
+ id = store_ebcdic(id, nd->seq, sizeof(nd->seq), ',');
+ sprintf(id, "%04X", nd->tag);
+}
+
static void chsc_process_sei_link_incident(struct chsc_sei_nt0_area *sei_area)
{
- struct chp_id chpid;
- int id;
+ struct lir *lir = (struct lir *) &sei_area->ccdf;
+ char iuparams[PARAMS_LEN], iunodeid[NODEID_LEN], auparams[PARAMS_LEN],
+ aunodeid[NODEID_LEN];
- CIO_CRW_EVENT(4, "chsc: link incident (rs=%02x, rs_id=%04x)\n",
- sei_area->rs, sei_area->rsid);
- if (sei_area->rs != 4)
+ CIO_CRW_EVENT(4, "chsc: link incident (rs=%02x, rs_id=%04x, iq=%02x)\n",
+ sei_area->rs, sei_area->rsid, sei_area->ccdf[0]);
+
+ /* Ignore NULL Link Incident Records. */
+ if (lir->iq.null)
return;
- id = __get_chpid_from_lir(sei_area->ccdf);
- if (id < 0)
- CIO_CRW_EVENT(4, "chsc: link incident - invalid LIR\n");
- else {
- chp_id_init(&chpid);
- chpid.id = id;
- chsc_chp_offline(chpid);
+
+ /* Inform user that a link requires maintenance actions because it has
+ * become degraded or not operational. Note that this log message is
+ * the primary intention behind a Link Incident Record. */
+
+ format_node_data(iuparams, iunodeid, &lir->incident_node);
+ format_node_data(auparams, aunodeid, &lir->attached_node);
+
+ switch (lir->iq.class) {
+ case LIR_IQ_CLASS_DEGRADED:
+ pr_warn("Link degraded: RS=%02x RSID=%04x IC=%02x "
+ "IUPARAMS=%s IUNODEID=%s AUPARAMS=%s AUNODEID=%s\n",
+ sei_area->rs, sei_area->rsid, lir->ic, iuparams,
+ iunodeid, auparams, aunodeid);
+ break;
+ case LIR_IQ_CLASS_NOT_OPERATIONAL:
+ pr_err("Link stopped: RS=%02x RSID=%04x IC=%02x "
+ "IUPARAMS=%s IUNODEID=%s AUPARAMS=%s AUNODEID=%s\n",
+ sei_area->rs, sei_area->rsid, lir->ic, iuparams,
+ iunodeid, auparams, aunodeid);
+ break;
+ default:
+ break;
}
}
@@ -999,28 +1080,10 @@ void __init chsc_init_cleanup(void)
free_page((unsigned long)sei_page);
}
-int chsc_enable_facility(int operation_code)
+int __chsc_enable_facility(struct chsc_sda_area *sda_area, int operation_code)
{
- unsigned long flags;
int ret;
- struct {
- struct chsc_header request;
- u8 reserved1:4;
- u8 format:4;
- u8 reserved2;
- u16 operation_code;
- u32 reserved3;
- u32 reserved4;
- u32 operation_data_area[252];
- struct chsc_header response;
- u32 reserved5:4;
- u32 format2:4;
- u32 reserved6:24;
- } __attribute__ ((packed)) *sda_area;
- spin_lock_irqsave(&chsc_page_lock, flags);
- memset(chsc_page, 0, PAGE_SIZE);
- sda_area = chsc_page;
sda_area->request.length = 0x0400;
sda_area->request.code = 0x0031;
sda_area->operation_code = operation_code;
@@ -1038,10 +1101,25 @@ int chsc_enable_facility(int operation_code)
default:
ret = chsc_error_from_response(sda_area->response.code);
}
+out:
+ return ret;
+}
+
+int chsc_enable_facility(int operation_code)
+{
+ struct chsc_sda_area *sda_area;
+ unsigned long flags;
+ int ret;
+
+ spin_lock_irqsave(&chsc_page_lock, flags);
+ memset(chsc_page, 0, PAGE_SIZE);
+ sda_area = chsc_page;
+
+ ret = __chsc_enable_facility(sda_area, operation_code);
if (ret != 0)
CIO_CRW_EVENT(2, "chsc: sda (oc=%x) failed (rc=%04x)\n",
operation_code, sda_area->response.code);
-out:
+
spin_unlock_irqrestore(&chsc_page_lock, flags);
return ret;
}
diff --git a/kernel/drivers/s390/cio/chsc.h b/kernel/drivers/s390/cio/chsc.h
index 76c9b5070..0de134c3a 100644
--- a/kernel/drivers/s390/cio/chsc.h
+++ b/kernel/drivers/s390/cio/chsc.h
@@ -115,6 +115,20 @@ struct chsc_scpd {
u8 data[PAGE_SIZE - 20];
} __attribute__ ((packed));
+struct chsc_sda_area {
+ struct chsc_header request;
+ u8 :4;
+ u8 format:4;
+ u8 :8;
+ u16 operation_code;
+ u32 :32;
+ u32 :32;
+ u32 operation_data_area[252];
+ struct chsc_header response;
+ u32 :4;
+ u32 format2:4;
+ u32 :24;
+} __packed __aligned(PAGE_SIZE);
extern int chsc_get_ssd_info(struct subchannel_id schid,
struct chsc_ssd_info *ssd);
@@ -122,6 +136,7 @@ extern int chsc_determine_css_characteristics(void);
extern int chsc_init(void);
extern void chsc_init_cleanup(void);
+int __chsc_enable_facility(struct chsc_sda_area *sda_area, int operation_code);
extern int chsc_enable_facility(int);
struct channel_subsystem;
extern int chsc_secm(struct channel_subsystem *, int);
diff --git a/kernel/drivers/s390/cio/cio.c b/kernel/drivers/s390/cio/cio.c
index 07fc5d9e7..690b8547e 100644
--- a/kernel/drivers/s390/cio/cio.c
+++ b/kernel/drivers/s390/cio/cio.c
@@ -476,26 +476,6 @@ static int cio_check_devno_blacklisted(struct subchannel *sch)
return 0;
}
-static int cio_validate_io_subchannel(struct subchannel *sch)
-{
- /* Initialization for io subchannels. */
- if (!css_sch_is_valid(&sch->schib))
- return -ENODEV;
-
- /* Devno is valid. */
- return cio_check_devno_blacklisted(sch);
-}
-
-static int cio_validate_msg_subchannel(struct subchannel *sch)
-{
- /* Initialization for message subchannels. */
- if (!css_sch_is_valid(&sch->schib))
- return -ENODEV;
-
- /* Devno is valid. */
- return cio_check_devno_blacklisted(sch);
-}
-
/**
* cio_validate_subchannel - basic validation of subchannel
* @sch: subchannel structure to be filled out
@@ -533,10 +513,11 @@ int cio_validate_subchannel(struct subchannel *sch, struct subchannel_id schid)
switch (sch->st) {
case SUBCHANNEL_TYPE_IO:
- err = cio_validate_io_subchannel(sch);
- break;
case SUBCHANNEL_TYPE_MSG:
- err = cio_validate_msg_subchannel(sch);
+ if (!css_sch_is_valid(&sch->schib))
+ err = -ENODEV;
+ else
+ err = cio_check_devno_blacklisted(sch);
break;
default:
err = 0;
@@ -826,11 +807,11 @@ static atomic_t chpid_reset_count;
static void s390_reset_chpids_mcck_handler(void)
{
struct crw crw;
- struct mci *mci;
+ union mci mci;
/* Check for pending channel report word. */
- mci = (struct mci *)&S390_lowcore.mcck_interruption_code;
- if (!mci->cp)
+ mci.val = S390_lowcore.mcck_interruption_code;
+ if (!mci.cp)
return;
/* Process channel report words. */
while (stcrw(&crw) == 0) {
@@ -944,18 +925,32 @@ void reipl_ccw_dev(struct ccw_dev_id *devid)
int __init cio_get_iplinfo(struct cio_iplinfo *iplinfo)
{
+ static struct chsc_sda_area sda_area __initdata;
struct subchannel_id schid;
struct schib schib;
schid = *(struct subchannel_id *)&S390_lowcore.subchannel_id;
if (!schid.one)
return -ENODEV;
+
+ if (schid.ssid) {
+ /*
+ * Firmware should have already enabled MSS but whoever started
+ * the kernel might have initiated a channel subsystem reset.
+ * Ensure that MSS is enabled.
+ */
+ memset(&sda_area, 0, sizeof(sda_area));
+ if (__chsc_enable_facility(&sda_area, CHSC_SDA_OC_MSS))
+ return -ENODEV;
+ }
if (stsch_err(schid, &schib))
return -ENODEV;
if (schib.pmcw.st != SUBCHANNEL_TYPE_IO)
return -ENODEV;
if (!schib.pmcw.dnv)
return -ENODEV;
+
+ iplinfo->ssid = schid.ssid;
iplinfo->devno = schib.pmcw.dev;
iplinfo->is_qdio = schib.pmcw.qf;
return 0;
diff --git a/kernel/drivers/s390/cio/cmf.c b/kernel/drivers/s390/cio/cmf.c
index 23054f8fa..b2afad5a5 100644
--- a/kernel/drivers/s390/cio/cmf.c
+++ b/kernel/drivers/s390/cio/cmf.c
@@ -113,7 +113,6 @@ module_param(format, bint, 0444);
* @readall: read a measurement block in a common format
* @reset: clear the data in the associated measurement block and
* reset its time stamp
- * @align: align an allocated block so that the hardware can use it
*/
struct cmb_operations {
int (*alloc) (struct ccw_device *);
@@ -122,7 +121,6 @@ struct cmb_operations {
u64 (*read) (struct ccw_device *, int);
int (*readall)(struct ccw_device *, struct cmbdata *);
void (*reset) (struct ccw_device *);
- void *(*align) (void *);
/* private: */
struct attribute_group *attr_group;
};
@@ -186,9 +184,8 @@ static inline void cmf_activate(void *area, unsigned int onoff)
static int set_schib(struct ccw_device *cdev, u32 mme, int mbfc,
unsigned long address)
{
- struct subchannel *sch;
-
- sch = to_subchannel(cdev->dev.parent);
+ struct subchannel *sch = to_subchannel(cdev->dev.parent);
+ int ret;
sch->config.mme = mme;
sch->config.mbfc = mbfc;
@@ -198,7 +195,15 @@ static int set_schib(struct ccw_device *cdev, u32 mme, int mbfc,
else
sch->config.mbi = address;
- return cio_commit_config(sch);
+ ret = cio_commit_config(sch);
+ if (!mme && ret == -ENODEV) {
+ /*
+ * The task was to disable measurement block updates but
+ * the subchannel is already gone. Report success.
+ */
+ ret = 0;
+ }
+ return ret;
}
struct set_schib_struct {
@@ -314,7 +319,7 @@ static int cmf_copy_block(struct ccw_device *cdev)
return -EBUSY;
}
cmb_data = cdev->private->cmb;
- hw_block = cmbops->align(cmb_data->hw_block);
+ hw_block = cmb_data->hw_block;
if (!memcmp(cmb_data->last_block, hw_block, cmb_data->size))
/* No need to copy. */
return 0;
@@ -425,7 +430,7 @@ static void cmf_generic_reset(struct ccw_device *cdev)
* Need to reset hw block as well to make the hardware start
* from 0 again.
*/
- memset(cmbops->align(cmb_data->hw_block), 0, cmb_data->size);
+ memset(cmb_data->hw_block, 0, cmb_data->size);
cmb_data->last_update = 0;
}
cdev->private->cmb_start_time = get_tod_clock();
@@ -606,12 +611,6 @@ static void free_cmb(struct ccw_device *cdev)
spin_lock_irq(cdev->ccwlock);
priv = cdev->private;
-
- if (list_empty(&priv->cmb_list)) {
- /* already freed */
- goto out;
- }
-
cmb_data = priv->cmb;
priv->cmb = NULL;
if (cmb_data)
@@ -626,7 +625,6 @@ static void free_cmb(struct ccw_device *cdev)
free_pages((unsigned long)cmb_area.mem, get_order(size));
cmb_area.mem = NULL;
}
-out:
spin_unlock_irq(cdev->ccwlock);
spin_unlock(&cmb_area.lock);
}
@@ -755,11 +753,6 @@ static void reset_cmb(struct ccw_device *cdev)
cmf_generic_reset(cdev);
}
-static void * align_cmb(void *area)
-{
- return area;
-}
-
static struct attribute_group cmf_attr_group;
static struct cmb_operations cmbops_basic = {
@@ -769,7 +762,6 @@ static struct cmb_operations cmbops_basic = {
.read = read_cmb,
.readall = readall_cmb,
.reset = reset_cmb,
- .align = align_cmb,
.attr_group = &cmf_attr_group,
};
@@ -804,64 +796,57 @@ struct cmbe {
u32 device_busy_time;
u32 initial_command_response_time;
u32 reserved[7];
-};
+} __packed __aligned(64);
-/*
- * kmalloc only guarantees 8 byte alignment, but we need cmbe
- * pointers to be naturally aligned. Make sure to allocate
- * enough space for two cmbes.
- */
-static inline struct cmbe *cmbe_align(struct cmbe *c)
-{
- unsigned long addr;
- addr = ((unsigned long)c + sizeof (struct cmbe) - sizeof(long)) &
- ~(sizeof (struct cmbe) - sizeof(long));
- return (struct cmbe*)addr;
-}
+static struct kmem_cache *cmbe_cache;
static int alloc_cmbe(struct ccw_device *cdev)
{
- struct cmbe *cmbe;
struct cmb_data *cmb_data;
- int ret;
+ struct cmbe *cmbe;
+ int ret = -ENOMEM;
- cmbe = kzalloc (sizeof (*cmbe) * 2, GFP_KERNEL);
+ cmbe = kmem_cache_zalloc(cmbe_cache, GFP_KERNEL);
if (!cmbe)
- return -ENOMEM;
- cmb_data = kzalloc(sizeof(struct cmb_data), GFP_KERNEL);
- if (!cmb_data) {
- ret = -ENOMEM;
+ return ret;
+
+ cmb_data = kzalloc(sizeof(*cmb_data), GFP_KERNEL);
+ if (!cmb_data)
goto out_free;
- }
+
cmb_data->last_block = kzalloc(sizeof(struct cmbe), GFP_KERNEL);
- if (!cmb_data->last_block) {
- ret = -ENOMEM;
+ if (!cmb_data->last_block)
goto out_free;
- }
- cmb_data->size = sizeof(struct cmbe);
- spin_lock_irq(cdev->ccwlock);
- if (cdev->private->cmb) {
- spin_unlock_irq(cdev->ccwlock);
- ret = -EBUSY;
- goto out_free;
- }
+
+ cmb_data->size = sizeof(*cmbe);
cmb_data->hw_block = cmbe;
+
+ spin_lock(&cmb_area.lock);
+ spin_lock_irq(cdev->ccwlock);
+ if (cdev->private->cmb)
+ goto out_unlock;
+
cdev->private->cmb = cmb_data;
- spin_unlock_irq(cdev->ccwlock);
/* activate global measurement if this is the first channel */
- spin_lock(&cmb_area.lock);
if (list_empty(&cmb_area.list))
cmf_activate(NULL, 1);
list_add_tail(&cdev->private->cmb_list, &cmb_area.list);
- spin_unlock(&cmb_area.lock);
+ spin_unlock_irq(cdev->ccwlock);
+ spin_unlock(&cmb_area.lock);
return 0;
+
+out_unlock:
+ spin_unlock_irq(cdev->ccwlock);
+ spin_unlock(&cmb_area.lock);
+ ret = -EBUSY;
out_free:
if (cmb_data)
kfree(cmb_data->last_block);
kfree(cmb_data);
- kfree(cmbe);
+ kmem_cache_free(cmbe_cache, cmbe);
+
return ret;
}
@@ -869,19 +854,21 @@ static void free_cmbe(struct ccw_device *cdev)
{
struct cmb_data *cmb_data;
+ spin_lock(&cmb_area.lock);
spin_lock_irq(cdev->ccwlock);
cmb_data = cdev->private->cmb;
cdev->private->cmb = NULL;
- if (cmb_data)
+ if (cmb_data) {
kfree(cmb_data->last_block);
+ kmem_cache_free(cmbe_cache, cmb_data->hw_block);
+ }
kfree(cmb_data);
- spin_unlock_irq(cdev->ccwlock);
/* deactivate global measurement if this is the last channel */
- spin_lock(&cmb_area.lock);
list_del_init(&cdev->private->cmb_list);
if (list_empty(&cmb_area.list))
cmf_activate(NULL, 0);
+ spin_unlock_irq(cdev->ccwlock);
spin_unlock(&cmb_area.lock);
}
@@ -897,7 +884,7 @@ static int set_cmbe(struct ccw_device *cdev, u32 mme)
return -EINVAL;
}
cmb_data = cdev->private->cmb;
- mba = mme ? (unsigned long) cmbe_align(cmb_data->hw_block) : 0;
+ mba = mme ? (unsigned long) cmb_data->hw_block : 0;
spin_unlock_irqrestore(cdev->ccwlock, flags);
return set_schib_wait(cdev, mme, 1, mba);
@@ -1022,11 +1009,6 @@ static void reset_cmbe(struct ccw_device *cdev)
cmf_generic_reset(cdev);
}
-static void * align_cmbe(void *area)
-{
- return cmbe_align(area);
-}
-
static struct attribute_group cmf_attr_group_ext;
static struct cmb_operations cmbops_extended = {
@@ -1036,7 +1018,6 @@ static struct cmb_operations cmbops_extended = {
.read = read_cmbe,
.readall = readall_cmbe,
.reset = reset_cmbe,
- .align = align_cmbe,
.attr_group = &cmf_attr_group_ext,
};
@@ -1171,23 +1152,28 @@ static ssize_t cmb_enable_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- return sprintf(buf, "%d\n", to_ccwdev(dev)->private->cmb ? 1 : 0);
+ struct ccw_device *cdev = to_ccwdev(dev);
+ int enabled;
+
+ spin_lock_irq(cdev->ccwlock);
+ enabled = !!cdev->private->cmb;
+ spin_unlock_irq(cdev->ccwlock);
+
+ return sprintf(buf, "%d\n", enabled);
}
static ssize_t cmb_enable_store(struct device *dev,
struct device_attribute *attr, const char *buf,
size_t c)
{
- struct ccw_device *cdev;
- int ret;
+ struct ccw_device *cdev = to_ccwdev(dev);
unsigned long val;
+ int ret;
ret = kstrtoul(buf, 16, &val);
if (ret)
return ret;
- cdev = to_ccwdev(dev);
-
switch (val) {
case 0:
ret = disable_cmf(cdev);
@@ -1195,12 +1181,13 @@ static ssize_t cmb_enable_store(struct device *dev,
case 1:
ret = enable_cmf(cdev);
break;
+ default:
+ ret = -EINVAL;
}
- return c;
+ return ret ? ret : c;
}
-
-DEVICE_ATTR(cmb_enable, 0644, cmb_enable_show, cmb_enable_store);
+DEVICE_ATTR_RW(cmb_enable);
int ccw_set_cmf(struct ccw_device *cdev, int enable)
{
@@ -1220,41 +1207,71 @@ int enable_cmf(struct ccw_device *cdev)
{
int ret;
+ device_lock(&cdev->dev);
+ get_device(&cdev->dev);
ret = cmbops->alloc(cdev);
- cmbops->reset(cdev);
if (ret)
- return ret;
+ goto out;
+ cmbops->reset(cdev);
+ ret = sysfs_create_group(&cdev->dev.kobj, cmbops->attr_group);
+ if (ret) {
+ cmbops->free(cdev);
+ goto out;
+ }
ret = cmbops->set(cdev, 2);
if (ret) {
+ sysfs_remove_group(&cdev->dev.kobj, cmbops->attr_group);
cmbops->free(cdev);
- return ret;
}
- ret = sysfs_create_group(&cdev->dev.kobj, cmbops->attr_group);
- if (!ret)
- return 0;
- cmbops->set(cdev, 0); //FIXME: this can fail
- cmbops->free(cdev);
+out:
+ if (ret)
+ put_device(&cdev->dev);
+
+ device_unlock(&cdev->dev);
return ret;
}
/**
- * disable_cmf() - switch off the channel measurement for a specific device
+ * __disable_cmf() - switch off the channel measurement for a specific device
* @cdev: The ccw device to be disabled
*
* Returns %0 for success or a negative error value.
*
* Context:
- * non-atomic
+ * non-atomic, device_lock() held.
*/
-int disable_cmf(struct ccw_device *cdev)
+int __disable_cmf(struct ccw_device *cdev)
{
int ret;
ret = cmbops->set(cdev, 0);
if (ret)
return ret;
- cmbops->free(cdev);
+
sysfs_remove_group(&cdev->dev.kobj, cmbops->attr_group);
+ cmbops->free(cdev);
+ put_device(&cdev->dev);
+
+ return ret;
+}
+
+/**
+ * disable_cmf() - switch off the channel measurement for a specific device
+ * @cdev: The ccw device to be disabled
+ *
+ * Returns %0 for success or a negative error value.
+ *
+ * Context:
+ * non-atomic
+ */
+int disable_cmf(struct ccw_device *cdev)
+{
+ int ret;
+
+ device_lock(&cdev->dev);
+ ret = __disable_cmf(cdev);
+ device_unlock(&cdev->dev);
+
return ret;
}
@@ -1295,10 +1312,32 @@ int cmf_reenable(struct ccw_device *cdev)
return cmbops->set(cdev, 2);
}
+/**
+ * cmf_reactivate() - reactivate measurement block updates
+ *
+ * Use this during resume from hibernate.
+ */
+void cmf_reactivate(void)
+{
+ spin_lock(&cmb_area.lock);
+ if (!list_empty(&cmb_area.list))
+ cmf_activate(cmb_area.mem, 1);
+ spin_unlock(&cmb_area.lock);
+}
+
+static int __init init_cmbe(void)
+{
+ cmbe_cache = kmem_cache_create("cmbe_cache", sizeof(struct cmbe),
+ __alignof__(struct cmbe), 0, NULL);
+
+ return cmbe_cache ? 0 : -ENOMEM;
+}
+
static int __init init_cmf(void)
{
char *format_string;
- char *detect_string = "parameter";
+ char *detect_string;
+ int ret;
/*
* If the user did not give a parameter, see if we are running on a
@@ -1324,15 +1363,18 @@ static int __init init_cmf(void)
case CMF_EXTENDED:
format_string = "extended";
cmbops = &cmbops_extended;
+
+ ret = init_cmbe();
+ if (ret)
+ return ret;
break;
default:
- return 1;
+ return -EINVAL;
}
pr_info("Channel measurement facility initialized using format "
"%s (mode %s)\n", format_string, detect_string);
return 0;
}
-
module_init(init_cmf);
diff --git a/kernel/drivers/s390/cio/css.c b/kernel/drivers/s390/cio/css.c
index 0268e5fd5..489e703dc 100644
--- a/kernel/drivers/s390/cio/css.c
+++ b/kernel/drivers/s390/cio/css.c
@@ -44,7 +44,6 @@ for_each_subchannel(int(*fn)(struct subchannel_id, void *), void *data)
int ret;
init_subchannel_id(&schid);
- ret = -ENODEV;
do {
do {
ret = fn(schid, data);
@@ -703,17 +702,12 @@ css_generate_pgid(struct channel_subsystem *css, u32 tod_high)
css->global_pgid.pgid_high.ext_cssid.version = 0x80;
css->global_pgid.pgid_high.ext_cssid.cssid = css->cssid;
} else {
-#ifdef CONFIG_SMP
css->global_pgid.pgid_high.cpu_addr = stap();
-#else
- css->global_pgid.pgid_high.cpu_addr = 0;
-#endif
}
get_cpu_id(&cpu_id);
css->global_pgid.cpu_id = cpu_id.ident;
css->global_pgid.cpu_model = cpu_id.machine;
css->global_pgid.tod_high = tod_high;
-
}
static void
@@ -1089,6 +1083,7 @@ void channel_subsystem_reinit(void)
if (chp)
chp_update_desc(chp);
}
+ cmf_reactivate();
}
#ifdef CONFIG_PROC_FS
diff --git a/kernel/drivers/s390/cio/device.c b/kernel/drivers/s390/cio/device.c
index dfef5e63c..6aae68412 100644
--- a/kernel/drivers/s390/cio/device.c
+++ b/kernel/drivers/s390/cio/device.c
@@ -1787,6 +1787,8 @@ static int ccw_device_remove(struct device *dev)
cdev->drv = NULL;
cdev->private->int_class = IRQIO_CIO;
spin_unlock_irq(cdev->ccwlock);
+ __disable_cmf(cdev);
+
return 0;
}
@@ -1797,7 +1799,7 @@ static void ccw_device_shutdown(struct device *dev)
cdev = to_ccwdev(dev);
if (cdev->drv && cdev->drv->shutdown)
cdev->drv->shutdown(cdev);
- disable_cmf(cdev);
+ __disable_cmf(cdev);
}
static int ccw_device_pm_prepare(struct device *dev)
diff --git a/kernel/drivers/s390/cio/device.h b/kernel/drivers/s390/cio/device.h
index 8d1d29873..065b1be98 100644
--- a/kernel/drivers/s390/cio/device.h
+++ b/kernel/drivers/s390/cio/device.h
@@ -125,11 +125,6 @@ void ccw_device_verify_done(struct ccw_device *, int);
void ccw_device_disband_start(struct ccw_device *);
void ccw_device_disband_done(struct ccw_device *, int);
-void ccw_device_stlck_start(struct ccw_device *, void *, void *, void *);
-void ccw_device_stlck_done(struct ccw_device *, void *, int);
-
-int ccw_device_call_handler(struct ccw_device *);
-
int ccw_device_stlck(struct ccw_device *);
/* Helper function for machine check handling. */
@@ -145,6 +140,7 @@ void ccw_device_set_timeout(struct ccw_device *, int);
void retry_set_schib(struct ccw_device *cdev);
void cmf_retry_copy_block(struct ccw_device *);
int cmf_reenable(struct ccw_device *);
+void cmf_reactivate(void);
int ccw_set_cmf(struct ccw_device *cdev, int enable);
extern struct device_attribute dev_attr_cmb_enable;
#endif
diff --git a/kernel/drivers/s390/cio/device_fsm.c b/kernel/drivers/s390/cio/device_fsm.c
index 83da53c8e..92e03b42e 100644
--- a/kernel/drivers/s390/cio/device_fsm.c
+++ b/kernel/drivers/s390/cio/device_fsm.c
@@ -731,6 +731,44 @@ static void ccw_device_boxed_verify(struct ccw_device *cdev,
}
/*
+ * Pass interrupt to device driver.
+ */
+static int ccw_device_call_handler(struct ccw_device *cdev)
+{
+ unsigned int stctl;
+ int ending_status;
+
+ /*
+ * we allow for the device action handler if .
+ * - we received ending status
+ * - the action handler requested to see all interrupts
+ * - we received an intermediate status
+ * - fast notification was requested (primary status)
+ * - unsolicited interrupts
+ */
+ stctl = scsw_stctl(&cdev->private->irb.scsw);
+ ending_status = (stctl & SCSW_STCTL_SEC_STATUS) ||
+ (stctl == (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)) ||
+ (stctl == SCSW_STCTL_STATUS_PEND);
+ if (!ending_status &&
+ !cdev->private->options.repall &&
+ !(stctl & SCSW_STCTL_INTER_STATUS) &&
+ !(cdev->private->options.fast &&
+ (stctl & SCSW_STCTL_PRIM_STATUS)))
+ return 0;
+
+ if (ending_status)
+ ccw_device_set_timeout(cdev, 0);
+
+ if (cdev->handler)
+ cdev->handler(cdev, cdev->private->intparm,
+ &cdev->private->irb);
+
+ memset(&cdev->private->irb, 0, sizeof(struct irb));
+ return 1;
+}
+
+/*
* Got an interrupt for a normal io (state online).
*/
static void
diff --git a/kernel/drivers/s390/cio/device_ops.c b/kernel/drivers/s390/cio/device_ops.c
index f3c417943..a69f702a2 100644
--- a/kernel/drivers/s390/cio/device_ops.c
+++ b/kernel/drivers/s390/cio/device_ops.c
@@ -412,52 +412,6 @@ int ccw_device_resume(struct ccw_device *cdev)
return cio_resume(sch);
}
-/*
- * Pass interrupt to device driver.
- */
-int
-ccw_device_call_handler(struct ccw_device *cdev)
-{
- unsigned int stctl;
- int ending_status;
-
- /*
- * we allow for the device action handler if .
- * - we received ending status
- * - the action handler requested to see all interrupts
- * - we received an intermediate status
- * - fast notification was requested (primary status)
- * - unsolicited interrupts
- */
- stctl = scsw_stctl(&cdev->private->irb.scsw);
- ending_status = (stctl & SCSW_STCTL_SEC_STATUS) ||
- (stctl == (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)) ||
- (stctl == SCSW_STCTL_STATUS_PEND);
- if (!ending_status &&
- !cdev->private->options.repall &&
- !(stctl & SCSW_STCTL_INTER_STATUS) &&
- !(cdev->private->options.fast &&
- (stctl & SCSW_STCTL_PRIM_STATUS)))
- return 0;
-
- /* Clear pending timers for device driver initiated I/O. */
- if (ending_status)
- ccw_device_set_timeout(cdev, 0);
- /*
- * Now we are ready to call the device driver interrupt handler.
- */
- if (cdev->handler)
- cdev->handler(cdev, cdev->private->intparm,
- &cdev->private->irb);
-
- /*
- * Clear the old and now useless interrupt response block.
- */
- memset(&cdev->private->irb, 0, sizeof(struct irb));
-
- return 1;
-}
-
/**
* ccw_device_get_ciw() - Search for CIW command in extended sense data.
* @cdev: ccw device to inspect
@@ -502,67 +456,6 @@ __u8 ccw_device_get_path_mask(struct ccw_device *cdev)
return sch->lpm;
}
-struct stlck_data {
- struct completion done;
- int rc;
-};
-
-void ccw_device_stlck_done(struct ccw_device *cdev, void *data, int rc)
-{
- struct stlck_data *sdata = data;
-
- sdata->rc = rc;
- complete(&sdata->done);
-}
-
-/*
- * Perform unconditional reserve + release.
- */
-int ccw_device_stlck(struct ccw_device *cdev)
-{
- struct subchannel *sch = to_subchannel(cdev->dev.parent);
- struct stlck_data data;
- u8 *buffer;
- int rc;
-
- /* Check if steal lock operation is valid for this device. */
- if (cdev->drv) {
- if (!cdev->private->options.force)
- return -EINVAL;
- }
- buffer = kzalloc(64, GFP_DMA | GFP_KERNEL);
- if (!buffer)
- return -ENOMEM;
- init_completion(&data.done);
- data.rc = -EIO;
- spin_lock_irq(sch->lock);
- rc = cio_enable_subchannel(sch, (u32) (addr_t) sch);
- if (rc)
- goto out_unlock;
- /* Perform operation. */
- cdev->private->state = DEV_STATE_STEAL_LOCK,
- ccw_device_stlck_start(cdev, &data, &buffer[0], &buffer[32]);
- spin_unlock_irq(sch->lock);
- /* Wait for operation to finish. */
- if (wait_for_completion_interruptible(&data.done)) {
- /* Got a signal. */
- spin_lock_irq(sch->lock);
- ccw_request_cancel(cdev);
- spin_unlock_irq(sch->lock);
- wait_for_completion(&data.done);
- }
- rc = data.rc;
- /* Check results. */
- spin_lock_irq(sch->lock);
- cio_disable_subchannel(sch);
- cdev->private->state = DEV_STATE_BOXED;
-out_unlock:
- spin_unlock_irq(sch->lock);
- kfree(buffer);
-
- return rc;
-}
-
/**
* chp_get_chp_desc - return newly allocated channel-path descriptor
* @cdev: device to obtain the descriptor for
diff --git a/kernel/drivers/s390/cio/device_pgid.c b/kernel/drivers/s390/cio/device_pgid.c
index 37ada05e8..da246b67e 100644
--- a/kernel/drivers/s390/cio/device_pgid.c
+++ b/kernel/drivers/s390/cio/device_pgid.c
@@ -9,9 +9,10 @@
#include <linux/kernel.h>
#include <linux/string.h>
+#include <linux/bitops.h>
#include <linux/types.h>
#include <linux/errno.h>
-#include <linux/bitops.h>
+#include <linux/slab.h>
#include <asm/ccwdev.h>
#include <asm/cio.h>
@@ -133,7 +134,7 @@ static void spid_build_cp(struct ccw_device *cdev, u8 fn)
{
struct ccw_request *req = &cdev->private->req;
struct ccw1 *cp = cdev->private->iccws;
- int i = 8 - ffs(req->lpm);
+ int i = pathmask_to_pos(req->lpm);
struct pgid *pgid = &cdev->private->pgid[i];
pgid->inf.fc = fn;
@@ -434,7 +435,7 @@ static void snid_build_cp(struct ccw_device *cdev)
{
struct ccw_request *req = &cdev->private->req;
struct ccw1 *cp = cdev->private->iccws;
- int i = 8 - ffs(req->lpm);
+ int i = pathmask_to_pos(req->lpm);
/* Channel program setup. */
cp->cmd_code = CCW_CMD_SENSE_PGID;
@@ -616,6 +617,11 @@ void ccw_device_disband_start(struct ccw_device *cdev)
ccw_request_start(cdev);
}
+struct stlck_data {
+ struct completion done;
+ int rc;
+};
+
static void stlck_build_cp(struct ccw_device *cdev, void *buf1, void *buf2)
{
struct ccw_request *req = &cdev->private->req;
@@ -634,7 +640,10 @@ static void stlck_build_cp(struct ccw_device *cdev, void *buf1, void *buf2)
static void stlck_callback(struct ccw_device *cdev, void *data, int rc)
{
- ccw_device_stlck_done(cdev, data, rc);
+ struct stlck_data *sdata = data;
+
+ sdata->rc = rc;
+ complete(&sdata->done);
}
/**
@@ -645,11 +654,9 @@ static void stlck_callback(struct ccw_device *cdev, void *data, int rc)
* @buf2: data pointer used in channel program
*
* Execute a channel program on @cdev to release an existing PGID reservation.
- * When finished, call ccw_device_stlck_done with a return code specifying the
- * result.
*/
-void ccw_device_stlck_start(struct ccw_device *cdev, void *data, void *buf1,
- void *buf2)
+static void ccw_device_stlck_start(struct ccw_device *cdev, void *data,
+ void *buf1, void *buf2)
{
struct subchannel *sch = to_subchannel(cdev->dev.parent);
struct ccw_request *req = &cdev->private->req;
@@ -667,3 +674,50 @@ void ccw_device_stlck_start(struct ccw_device *cdev, void *data, void *buf1,
ccw_request_start(cdev);
}
+/*
+ * Perform unconditional reserve + release.
+ */
+int ccw_device_stlck(struct ccw_device *cdev)
+{
+ struct subchannel *sch = to_subchannel(cdev->dev.parent);
+ struct stlck_data data;
+ u8 *buffer;
+ int rc;
+
+ /* Check if steal lock operation is valid for this device. */
+ if (cdev->drv) {
+ if (!cdev->private->options.force)
+ return -EINVAL;
+ }
+ buffer = kzalloc(64, GFP_DMA | GFP_KERNEL);
+ if (!buffer)
+ return -ENOMEM;
+ init_completion(&data.done);
+ data.rc = -EIO;
+ spin_lock_irq(sch->lock);
+ rc = cio_enable_subchannel(sch, (u32) (addr_t) sch);
+ if (rc)
+ goto out_unlock;
+ /* Perform operation. */
+ cdev->private->state = DEV_STATE_STEAL_LOCK;
+ ccw_device_stlck_start(cdev, &data, &buffer[0], &buffer[32]);
+ spin_unlock_irq(sch->lock);
+ /* Wait for operation to finish. */
+ if (wait_for_completion_interruptible(&data.done)) {
+ /* Got a signal. */
+ spin_lock_irq(sch->lock);
+ ccw_request_cancel(cdev);
+ spin_unlock_irq(sch->lock);
+ wait_for_completion(&data.done);
+ }
+ rc = data.rc;
+ /* Check results. */
+ spin_lock_irq(sch->lock);
+ cio_disable_subchannel(sch);
+ cdev->private->state = DEV_STATE_BOXED;
+out_unlock:
+ spin_unlock_irq(sch->lock);
+ kfree(buffer);
+
+ return rc;
+}
diff --git a/kernel/drivers/s390/cio/eadm_sch.c b/kernel/drivers/s390/cio/eadm_sch.c
index bee8c11cd..b3f44bc7f 100644
--- a/kernel/drivers/s390/cio/eadm_sch.c
+++ b/kernel/drivers/s390/cio/eadm_sch.c
@@ -336,7 +336,6 @@ static int eadm_subchannel_sch_event(struct subchannel *sch, int process)
{
struct eadm_private *private;
unsigned long flags;
- int ret = 0;
spin_lock_irqsave(sch->lock, flags);
if (!device_is_registered(&sch->dev))
@@ -356,7 +355,7 @@ static int eadm_subchannel_sch_event(struct subchannel *sch, int process)
out_unlock:
spin_unlock_irqrestore(sch->lock, flags);
- return ret;
+ return 0;
}
static struct css_device_id eadm_subchannel_ids[] = {
diff --git a/kernel/drivers/s390/cio/qdio_main.c b/kernel/drivers/s390/cio/qdio_main.c
index 848e3b64e..4bb5262f7 100644
--- a/kernel/drivers/s390/cio/qdio_main.c
+++ b/kernel/drivers/s390/cio/qdio_main.c
@@ -319,6 +319,8 @@ static int qdio_siga_output(struct qdio_q *q, unsigned int *busy_bit,
int retries = 0, cc;
unsigned long laob = 0;
+ WARN_ON_ONCE(aob && ((queue_type(q) != QDIO_IQDIO_QFMT) ||
+ !q->u.out.use_cq));
if (q->u.out.use_cq && aob != 0) {
fc = QDIO_SIGA_WRITEQ;
laob = aob;
@@ -329,8 +331,6 @@ static int qdio_siga_output(struct qdio_q *q, unsigned int *busy_bit,
fc |= QDIO_SIGA_QEBSM_FLAG;
}
again:
- WARN_ON_ONCE((aob && queue_type(q) != QDIO_IQDIO_QFMT) ||
- (aob && fc != QDIO_SIGA_WRITEQ));
cc = do_siga_output(schid, q->mask, busy_bit, fc, laob);
/* hipersocket busy condition */