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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Browse source 
Pull s390 updates from Martin Schwidefsky:

 - Improvements for the spectre defense:
    * The spectre related code is consolidated to a single file
      nospec-branch.c
    * Automatic enable/disable for the spectre v2 defenses (expoline vs.
      nobp)
    * Syslog messages for specve v2 are added
    * Enable CONFIG_GENERIC_CPU_VULNERABILITIES and define the attribute
      functions for spectre v1 and v2

 - Add helper macros for assembler alternatives and use them to shorten
   the code in entry.S.

 - Add support for persistent configuration data via the SCLP Store Data
   interface. The H/W interface requires a page table that uses 4K pages
   only, the code to setup such an address space is added as well.

 - Enable virtio GPU emulation in QEMU. To do this the depends
   statements for a few common Kconfig options are modified.

 - Add support for format-3 channel path descriptors and add a binary
   sysfs interface to export the associated utility strings.

 - Add a sysfs attribute to control the IFCC handling in case of
   constant channel errors.

 - The vfio-ccw changes from Cornelia.

 - Bug fixes and cleanups.

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (40 commits)
  s390/kvm: improve stack frame constants in entry.S
  s390/lpp: use assembler alternatives for the LPP instruction
  s390/entry.S: use assembler alternatives
  s390: add assembler macros for CPU alternatives
  s390: add sysfs attributes for spectre
  s390: report spectre mitigation via syslog
  s390: add automatic detection of the spectre defense
  s390: move nobp parameter functions to nospec-branch.c
  s390/cio: add util_string sysfs attribute
  s390/chsc: query utility strings via fmt3 channel path descriptor
  s390/cio: rename struct channel_path_desc
  s390/cio: fix unbind of io_subchannel_driver
  s390/qdio: split up CCQ handling for EQBS / SQBS
  s390/qdio: don't retry EQBS after CCQ 96
  s390/qdio: restrict buffer merging to eligible devices
  s390/qdio: don't merge ERROR output buffers
  s390/qdio: simplify math in get_*_buffer_frontier()
  s390/decompressor: trim uncompressed image head during the build
  s390/crypto: Fix kernel crash on aes_s390 module remove.
  s390/defkeymap: fix global init to zero
  ...
This commit is contained in:
Linus Torvalds 2018-04-09 09:04:10 -07:00
commit becdce1c66
56 changed files with 1633 additions and 475 deletions
Download patch file Download diff file Expand all files Collapse all files

9
drivers/s390/block/dasd.c
View file

@ -3918,8 +3918,13 @@ static int dasd_generic_requeue_all_requests(struct dasd_device *device)
cqr = refers;
}
if (cqr->block)
list_del_init(&cqr->blocklist);
/*
* _dasd_requeue_request already checked for a valid
* blockdevice, no need to check again
* all erp requests (cqr->refers) have a cqr->block
* pointer copy from the original cqr
*/
list_del_init(&cqr->blocklist);
cqr->block->base->discipline->free_cp(
cqr, (struct request *) cqr->callback_data);
}

17
drivers/s390/block/dasd_3990_erp.c
View file

@ -2214,15 +2214,28 @@ static void dasd_3990_erp_disable_path(struct dasd_device *device, __u8 lpum)
{
int pos = pathmask_to_pos(lpum);
if (!(device->features & DASD_FEATURE_PATH_AUTODISABLE)) {
dev_err(&device->cdev->dev,
"Path %x.%02x (pathmask %02x) is operational despite excessive IFCCs\n",
device->path[pos].cssid, device->path[pos].chpid, lpum);
goto out;
}
/* no remaining path, cannot disable */
if (!(dasd_path_get_opm(device) & ~lpum))
return;
if (!(dasd_path_get_opm(device) & ~lpum)) {
dev_err(&device->cdev->dev,
"Last path %x.%02x (pathmask %02x) is operational despite excessive IFCCs\n",
device->path[pos].cssid, device->path[pos].chpid, lpum);
goto out;
}
dev_err(&device->cdev->dev,
"Path %x.%02x (pathmask %02x) is disabled - IFCC threshold exceeded\n",
device->path[pos].cssid, device->path[pos].chpid, lpum);
dasd_path_remove_opm(device, lpum);
dasd_path_add_ifccpm(device, lpum);
out:
device->path[pos].errorclk = 0;
atomic_set(&device->path[pos].error_count, 0);
}

43
drivers/s390/block/dasd_devmap.c
View file

@ -1550,9 +1550,49 @@ dasd_path_threshold_store(struct device *dev, struct device_attribute *attr,
dasd_put_device(device);
return count;
}
static DEVICE_ATTR(path_threshold, 0644, dasd_path_threshold_show,
dasd_path_threshold_store);
/*
* configure if path is disabled after IFCC/CCC error threshold is
* exceeded
*/
static ssize_t
dasd_path_autodisable_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct dasd_devmap *devmap;
int flag;
devmap = dasd_find_busid(dev_name(dev));
if (!IS_ERR(devmap))
flag = (devmap->features & DASD_FEATURE_PATH_AUTODISABLE) != 0;
else
flag = (DASD_FEATURE_DEFAULT &
DASD_FEATURE_PATH_AUTODISABLE) != 0;
return snprintf(buf, PAGE_SIZE, flag ? "1\n" : "0\n");
}
static ssize_t
dasd_path_autodisable_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
unsigned int val;
int rc;
if (kstrtouint(buf, 0, &val) || val > 1)
return -EINVAL;
rc = dasd_set_feature(to_ccwdev(dev),
DASD_FEATURE_PATH_AUTODISABLE, val);
return rc ? : count;
}
static DEVICE_ATTR(path_autodisable, 0644,
dasd_path_autodisable_show,
dasd_path_autodisable_store);
/*
* interval for IFCC/CCC checks
* meaning time with no IFCC/CCC error before the error counter
@ -1623,6 +1663,7 @@ static struct attribute * dasd_attrs[] = {
&dev_attr_host_access_count.attr,
&dev_attr_path_masks.attr,
&dev_attr_path_threshold.attr,
&dev_attr_path_autodisable.attr,
&dev_attr_path_interval.attr,
&dev_attr_path_reset.attr,
&dev_attr_hpf.attr,

27
drivers/s390/block/dasd_eckd.c
View file

@ -214,24 +214,25 @@ static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head)
geo->head |= head;
}
static int check_XRC(struct ccw1 *ccw, struct DE_eckd_data *data,
static int set_timestamp(struct ccw1 *ccw, struct DE_eckd_data *data,
struct dasd_device *device)
{
struct dasd_eckd_private *private = device->private;
int rc;
if (!private->rdc_data.facilities.XRC_supported)
rc = get_phys_clock(&data->ep_sys_time);
/*
* Ignore return code if XRC is not supported or
* sync clock is switched off
*/
if ((rc && !private->rdc_data.facilities.XRC_supported) ||
rc == -EOPNOTSUPP || rc == -EACCES)
return 0;
/* switch on System Time Stamp - needed for XRC Support */
data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */
data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */
rc = get_phys_clock(&data->ep_sys_time);
/* Ignore return code if sync clock is switched off. */
if (rc == -EOPNOTSUPP || rc == -EACCES)
rc = 0;
if (ccw) {
ccw->count = sizeof(struct DE_eckd_data);
ccw->flags |= CCW_FLAG_SLI;
@ -286,12 +287,12 @@ define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk,
case DASD_ECKD_CCW_WRITE_KD_MT:
data->mask.perm = 0x02;
data->attributes.operation = private->attrib.operation;
rc = check_XRC(ccw, data, device);
rc = set_timestamp(ccw, data, device);
break;
case DASD_ECKD_CCW_WRITE_CKD:
case DASD_ECKD_CCW_WRITE_CKD_MT:
data->attributes.operation = DASD_BYPASS_CACHE;
rc = check_XRC(ccw, data, device);
rc = set_timestamp(ccw, data, device);
break;
case DASD_ECKD_CCW_ERASE:
case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
@ -299,7 +300,7 @@ define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk,
data->mask.perm = 0x3;
data->mask.auth = 0x1;
data->attributes.operation = DASD_BYPASS_CACHE;
rc = check_XRC(ccw, data, device);
rc = set_timestamp(ccw, data, device);
break;
case DASD_ECKD_CCW_WRITE_FULL_TRACK:
data->mask.perm = 0x03;
@ -310,7 +311,7 @@ define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk,
data->mask.perm = 0x02;
data->attributes.operation = private->attrib.operation;
data->blk_size = blksize;
rc = check_XRC(ccw, data, device);
rc = set_timestamp(ccw, data, device);
break;
default:
dev_err(&device->cdev->dev,
@ -993,7 +994,7 @@ static int dasd_eckd_read_conf(struct dasd_device *device)
struct dasd_eckd_private *private, path_private;
struct dasd_uid *uid;
char print_path_uid[60], print_device_uid[60];
struct channel_path_desc *chp_desc;
struct channel_path_desc_fmt0 *chp_desc;
struct subchannel_id sch_id;
private = device->private;
@ -3440,7 +3441,7 @@ static int prepare_itcw(struct itcw *itcw,
dedata->mask.perm = 0x02;
dedata->attributes.operation = basepriv->attrib.operation;
dedata->blk_size = blksize;
rc = check_XRC(NULL, dedata, basedev);
rc = set_timestamp(NULL, dedata, basedev);
dedata->ga_extended |= 0x42;
lredata->operation.orientation = 0x0;
lredata->operation.operation = 0x3F;

2
drivers/s390/char/Makefile
View file

@ -23,7 +23,7 @@ CFLAGS_REMOVE_sclp_early_core.o += $(CC_FLAGS_EXPOLINE)
obj-y += ctrlchar.o keyboard.o defkeymap.o sclp.o sclp_rw.o sclp_quiesce.o \
sclp_cmd.o sclp_config.o sclp_cpi_sys.o sclp_ocf.o sclp_ctl.o \
sclp_early.o sclp_early_core.o
sclp_early.o sclp_early_core.o sclp_sd.o
obj-$(CONFIG_TN3270) += raw3270.o
obj-$(CONFIG_TN3270_CONSOLE) += con3270.o

64
drivers/s390/char/defkeymap.c
View file

@ -9,7 +9,9 @@
#include <linux/kbd_kern.h>
#include <linux/kbd_diacr.h>
u_short plain_map[NR_KEYS] = {
#include "keyboard.h"
u_short ebc_plain_map[NR_KEYS] = {
0xf000, 0xf000, 0xf000, 0xf000, 0xf000, 0xf000, 0xf000, 0xf000,
0xf000, 0xf000, 0xf000, 0xf000, 0xf000, 0xf000, 0xf000, 0xf000,
0xf000, 0xf000, 0xf000, 0xf000, 0xf000, 0xf000, 0xf000, 0xf000,
@ -85,12 +87,12 @@ static u_short shift_ctrl_map[NR_KEYS] = {
0xf20a, 0xf108, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200,
};
ushort *key_maps[MAX_NR_KEYMAPS] = {
plain_map, shift_map, NULL, NULL,
ushort *ebc_key_maps[MAX_NR_KEYMAPS] = {
ebc_plain_map, shift_map, NULL, NULL,
ctrl_map, shift_ctrl_map, NULL,
};
unsigned int keymap_count = 4;
unsigned int ebc_keymap_count = 4;
/*
@ -99,7 +101,7 @@ unsigned int keymap_count = 4;
* the default and allocate dynamically in chunks of 512 bytes.
*/
char func_buf[] = {
char ebc_func_buf[] = {
'\033', '[', '[', 'A', 0,
'\033', '[', '[', 'B', 0,
'\033', '[', '[', 'C', 0,
@ -123,37 +125,37 @@ char func_buf[] = {
};
char *funcbufptr = func_buf;
int funcbufsize = sizeof(func_buf);
int funcbufleft = 0; /* space left */
char *ebc_funcbufptr = ebc_func_buf;
int ebc_funcbufsize = sizeof(ebc_func_buf);
int ebc_funcbufleft; /* space left */
char *func_table[MAX_NR_FUNC] = {
func_buf + 0,
func_buf + 5,
func_buf + 10,
func_buf + 15,
func_buf + 20,
func_buf + 25,
func_buf + 31,
func_buf + 37,
func_buf + 43,
func_buf + 49,
func_buf + 55,
func_buf + 61,
func_buf + 67,
func_buf + 73,
func_buf + 79,
func_buf + 85,
func_buf + 91,
func_buf + 97,
func_buf + 103,
func_buf + 109,
char *ebc_func_table[MAX_NR_FUNC] = {
ebc_func_buf + 0,
ebc_func_buf + 5,
ebc_func_buf + 10,
ebc_func_buf + 15,
ebc_func_buf + 20,
ebc_func_buf + 25,
ebc_func_buf + 31,
ebc_func_buf + 37,
ebc_func_buf + 43,
ebc_func_buf + 49,
ebc_func_buf + 55,
ebc_func_buf + 61,
ebc_func_buf + 67,
ebc_func_buf + 73,
ebc_func_buf + 79,
ebc_func_buf + 85,
ebc_func_buf + 91,
ebc_func_buf + 97,
ebc_func_buf + 103,
ebc_func_buf + 109,
NULL,
};
struct kbdiacruc accent_table[MAX_DIACR] = {
struct kbdiacruc ebc_accent_table[MAX_DIACR] = {
{'^', 'c', 0003}, {'^', 'd', 0004},
{'^', 'z', 0032}, {'^', 0012, 0000},
};
unsigned int accent_table_size = 4;
unsigned int ebc_accent_table_size = 4;

32
drivers/s390/char/keyboard.c
View file

@ -54,24 +54,24 @@ kbd_alloc(void) {
kbd = kzalloc(sizeof(struct kbd_data), GFP_KERNEL);
if (!kbd)
goto out;
kbd->key_maps = kzalloc(sizeof(key_maps), GFP_KERNEL);
kbd->key_maps = kzalloc(sizeof(ebc_key_maps), GFP_KERNEL);
if (!kbd->key_maps)
goto out_kbd;
for (i = 0; i < ARRAY_SIZE(key_maps); i++) {
if (key_maps[i]) {
kbd->key_maps[i] = kmemdup(key_maps[i],
for (i = 0; i < ARRAY_SIZE(ebc_key_maps); i++) {
if (ebc_key_maps[i]) {
kbd->key_maps[i] = kmemdup(ebc_key_maps[i],
sizeof(u_short) * NR_KEYS,
GFP_KERNEL);
if (!kbd->key_maps[i])
goto out_maps;
}
}
kbd->func_table = kzalloc(sizeof(func_table), GFP_KERNEL);
kbd->func_table = kzalloc(sizeof(ebc_func_table), GFP_KERNEL);
if (!kbd->func_table)
goto out_maps;
for (i = 0; i < ARRAY_SIZE(func_table); i++) {
if (func_table[i]) {
kbd->func_table[i] = kstrdup(func_table[i],
for (i = 0; i < ARRAY_SIZE(ebc_func_table); i++) {
if (ebc_func_table[i]) {
kbd->func_table[i] = kstrdup(ebc_func_table[i],
GFP_KERNEL);
if (!kbd->func_table[i])
goto out_func;
@ -81,22 +81,22 @@ kbd_alloc(void) {
kzalloc(sizeof(fn_handler_fn *) * NR_FN_HANDLER, GFP_KERNEL);
if (!kbd->fn_handler)
goto out_func;
kbd->accent_table = kmemdup(accent_table,
kbd->accent_table = kmemdup(ebc_accent_table,
sizeof(struct kbdiacruc) * MAX_DIACR,
GFP_KERNEL);
if (!kbd->accent_table)
goto out_fn_handler;
kbd->accent_table_size = accent_table_size;
kbd->accent_table_size = ebc_accent_table_size;
return kbd;
out_fn_handler:
kfree(kbd->fn_handler);
out_func:
for (i = 0; i < ARRAY_SIZE(func_table); i++)
for (i = 0; i < ARRAY_SIZE(ebc_func_table); i++)
kfree(kbd->func_table[i]);
kfree(kbd->func_table);
out_maps:
for (i = 0; i < ARRAY_SIZE(key_maps); i++)
for (i = 0; i < ARRAY_SIZE(ebc_key_maps); i++)
kfree(kbd->key_maps[i]);
kfree(kbd->key_maps);
out_kbd:
@ -112,10 +112,10 @@ kbd_free(struct kbd_data *kbd)
kfree(kbd->accent_table);
kfree(kbd->fn_handler);
for (i = 0; i < ARRAY_SIZE(func_table); i++)
for (i = 0; i < ARRAY_SIZE(ebc_func_table); i++)
kfree(kbd->func_table[i]);
kfree(kbd->func_table);
for (i = 0; i < ARRAY_SIZE(key_maps); i++)
for (i = 0; i < ARRAY_SIZE(ebc_key_maps); i++)
kfree(kbd->key_maps[i]);
kfree(kbd->key_maps);
kfree(kbd);
@ -131,7 +131,7 @@ kbd_ascebc(struct kbd_data *kbd, unsigned char *ascebc)
int i, j, k;
memset(ascebc, 0x40, 256);
for (i = 0; i < ARRAY_SIZE(key_maps); i++) {
for (i = 0; i < ARRAY_SIZE(ebc_key_maps); i++) {
keymap = kbd->key_maps[i];
if (!keymap)
continue;
@ -158,7 +158,7 @@ kbd_ebcasc(struct kbd_data *kbd, unsigned char *ebcasc)
int i, j, k;
memset(ebcasc, ' ', 256);
for (i = 0; i < ARRAY_SIZE(key_maps); i++) {
for (i = 0; i < ARRAY_SIZE(ebc_key_maps); i++) {
keymap = kbd->key_maps[i];
if (!keymap)
continue;

11
drivers/s390/char/keyboard.h
View file

@ -14,6 +14,17 @@
struct kbd_data;
extern int ebc_funcbufsize, ebc_funcbufleft;
extern char *ebc_func_table[MAX_NR_FUNC];
extern char ebc_func_buf[];
extern char *ebc_funcbufptr;
extern unsigned int ebc_keymap_count;
extern struct kbdiacruc ebc_accent_table[];
extern unsigned int ebc_accent_table_size;
extern unsigned short *ebc_key_maps[MAX_NR_KEYMAPS];
extern unsigned short ebc_plain_map[NR_KEYS];
typedef void (fn_handler_fn)(struct kbd_data *);
/*

58
drivers/s390/char/sclp.c
View file

@ -417,7 +417,7 @@ sclp_dispatch_evbufs(struct sccb_header *sccb)
reg = NULL;
list_for_each(l, &sclp_reg_list) {
reg = list_entry(l, struct sclp_register, list);
if (reg->receive_mask & (1 << (32 - evbuf->type)))
if (reg->receive_mask & SCLP_EVTYP_MASK(evbuf->type))
break;
else
reg = NULL;
@ -618,9 +618,12 @@ struct sclp_statechangebuf {
u16 _zeros : 12;
u16 mask_length;
u64 sclp_active_facility_mask;
sccb_mask_t sclp_receive_mask;
sccb_mask_t sclp_send_mask;
u32 read_data_function_mask;
u8 masks[2 * 1021 + 4]; /* variable length */
/*
* u8 sclp_receive_mask[mask_length];
* u8 sclp_send_mask[mask_length];
* u32 read_data_function_mask;
*/
} __attribute__((packed));
@ -631,14 +634,14 @@ sclp_state_change_cb(struct evbuf_header *evbuf)
unsigned long flags;
struct sclp_statechangebuf *scbuf;
BUILD_BUG_ON(sizeof(struct sclp_statechangebuf) > PAGE_SIZE);
scbuf = (struct sclp_statechangebuf *) evbuf;
if (scbuf->mask_length != sizeof(sccb_mask_t))
return;
spin_lock_irqsave(&sclp_lock, flags);
if (scbuf->validity_sclp_receive_mask)
sclp_receive_mask = scbuf->sclp_receive_mask;
sclp_receive_mask = sccb_get_recv_mask(scbuf);
if (scbuf->validity_sclp_send_mask)
sclp_send_mask = scbuf->sclp_send_mask;
sclp_send_mask = sccb_get_send_mask(scbuf);
spin_unlock_irqrestore(&sclp_lock, flags);
if (scbuf->validity_sclp_active_facility_mask)
sclp.facilities = scbuf->sclp_active_facility_mask;
@ -748,7 +751,7 @@ EXPORT_SYMBOL(sclp_remove_processed);
/* Prepare init mask request. Called while sclp_lock is locked. */
static inline void
__sclp_make_init_req(u32 receive_mask, u32 send_mask)
__sclp_make_init_req(sccb_mask_t receive_mask, sccb_mask_t send_mask)
{
struct init_sccb *sccb;
@ -761,12 +764,15 @@ __sclp_make_init_req(u32 receive_mask, u32 send_mask)
sclp_init_req.callback = NULL;
sclp_init_req.callback_data = NULL;
sclp_init_req.sccb = sccb;
sccb->header.length = sizeof(struct init_sccb);
sccb->mask_length = sizeof(sccb_mask_t);
sccb->receive_mask = receive_mask;
sccb->send_mask = send_mask;
sccb->sclp_receive_mask = 0;
sccb->sclp_send_mask = 0;
sccb->header.length = sizeof(*sccb);
if (sclp_mask_compat_mode)
sccb->mask_length = SCLP_MASK_SIZE_COMPAT;
else
sccb->mask_length = sizeof(sccb_mask_t);
sccb_set_recv_mask(sccb, receive_mask);
sccb_set_send_mask(sccb, send_mask);
sccb_set_sclp_recv_mask(sccb, 0);
sccb_set_sclp_send_mask(sccb, 0);
}
/* Start init mask request. If calculate is non-zero, calculate the mask as
@ -822,8 +828,8 @@ sclp_init_mask(int calculate)
sccb->header.response_code == 0x20) {
/* Successful request */
if (calculate) {
sclp_receive_mask = sccb->sclp_receive_mask;
sclp_send_mask = sccb->sclp_send_mask;
sclp_receive_mask = sccb_get_sclp_recv_mask(sccb);
sclp_send_mask = sccb_get_sclp_send_mask(sccb);
} else {
sclp_receive_mask = 0;
sclp_send_mask = 0;
@ -974,12 +980,18 @@ sclp_check_interface(void)
irq_subclass_unregister(IRQ_SUBCLASS_SERVICE_SIGNAL);
spin_lock_irqsave(&sclp_lock, flags);
del_timer(&sclp_request_timer);
if (sclp_init_req.status == SCLP_REQ_DONE &&
sccb->header.response_code == 0x20) {
rc = 0;
break;
} else
rc = -EBUSY;
rc = -EBUSY;
if (sclp_init_req.status == SCLP_REQ_DONE) {
if (sccb->header.response_code == 0x20) {
rc = 0;
break;
} else if (sccb->header.response_code == 0x74f0) {
if (!sclp_mask_compat_mode) {
sclp_mask_compat_mode = true;
retry = 0;
}
}
}
}
unregister_external_irq(EXT_IRQ_SERVICE_SIG, sclp_check_handler);
spin_unlock_irqrestore(&sclp_lock, flags);

61
drivers/s390/char/sclp.h
View file

@ -18,7 +18,7 @@
#define MAX_KMEM_PAGES (sizeof(unsigned long) << 3)
#define SCLP_CONSOLE_PAGES 6
#define SCLP_EVTYP_MASK(T) (1U << (32 - (T)))
#define SCLP_EVTYP_MASK(T) (1UL << (sizeof(sccb_mask_t) * BITS_PER_BYTE - (T)))
#define EVTYP_OPCMD 0x01
#define EVTYP_MSG 0x02
@ -28,6 +28,7 @@
#define EVTYP_PMSGCMD 0x09
#define EVTYP_ASYNC 0x0A
#define EVTYP_CTLPROGIDENT 0x0B
#define EVTYP_STORE_DATA 0x0C
#define EVTYP_ERRNOTIFY 0x18
#define EVTYP_VT220MSG 0x1A
#define EVTYP_SDIAS 0x1C
@ -42,6 +43,7 @@
#define EVTYP_PMSGCMD_MASK SCLP_EVTYP_MASK(EVTYP_PMSGCMD)
#define EVTYP_ASYNC_MASK SCLP_EVTYP_MASK(EVTYP_ASYNC)
#define EVTYP_CTLPROGIDENT_MASK SCLP_EVTYP_MASK(EVTYP_CTLPROGIDENT)
#define EVTYP_STORE_DATA_MASK SCLP_EVTYP_MASK(EVTYP_STORE_DATA)
#define EVTYP_ERRNOTIFY_MASK SCLP_EVTYP_MASK(EVTYP_ERRNOTIFY)
#define EVTYP_VT220MSG_MASK SCLP_EVTYP_MASK(EVTYP_VT220MSG)
#define EVTYP_SDIAS_MASK SCLP_EVTYP_MASK(EVTYP_SDIAS)
@ -85,7 +87,7 @@ enum sclp_pm_event {
#define SCLP_PANIC_PRIO 1
#define SCLP_PANIC_PRIO_CLIENT 0
typedef u32 sccb_mask_t; /* ATTENTION: assumes 32bit mask !!! */
typedef u64 sccb_mask_t;
struct sccb_header {
u16 length;
@ -98,12 +100,53 @@ struct init_sccb {
struct sccb_header header;
u16 _reserved;
u16 mask_length;
sccb_mask_t receive_mask;
sccb_mask_t send_mask;
sccb_mask_t sclp_receive_mask;
sccb_mask_t sclp_send_mask;
u8 masks[4 * 1021]; /* variable length */
/*
* u8 receive_mask[mask_length];
* u8 send_mask[mask_length];
* u8 sclp_receive_mask[mask_length];
* u8 sclp_send_mask[mask_length];
*/
} __attribute__((packed));
#define SCLP_MASK_SIZE_COMPAT 4
static inline sccb_mask_t sccb_get_mask(u8 *masks, size_t len, int i)
{
sccb_mask_t res = 0;
memcpy(&res, masks + i * len, min(sizeof(res), len));
return res;
}
static inline void sccb_set_mask(u8 *masks, size_t len, int i, sccb_mask_t val)
{
memset(masks + i * len, 0, len);
memcpy(masks + i * len, &val, min(sizeof(val), len));
}
#define sccb_get_generic_mask(sccb, i) \
({ \
__typeof__(sccb) __sccb = sccb; \
\
sccb_get_mask(__sccb->masks, __sccb->mask_length, i); \
})
#define sccb_get_recv_mask(sccb) sccb_get_generic_mask(sccb, 0)
#define sccb_get_send_mask(sccb) sccb_get_generic_mask(sccb, 1)
#define sccb_get_sclp_recv_mask(sccb) sccb_get_generic_mask(sccb, 2)
#define sccb_get_sclp_send_mask(sccb) sccb_get_generic_mask(sccb, 3)
#define sccb_set_generic_mask(sccb, i, val) \
({ \
__typeof__(sccb) __sccb = sccb; \
\
sccb_set_mask(__sccb->masks, __sccb->mask_length, i, val); \
})
#define sccb_set_recv_mask(sccb, val) sccb_set_generic_mask(sccb, 0, val)
#define sccb_set_send_mask(sccb, val) sccb_set_generic_mask(sccb, 1, val)
#define sccb_set_sclp_recv_mask(sccb, val) sccb_set_generic_mask(sccb, 2, val)
#define sccb_set_sclp_send_mask(sccb, val) sccb_set_generic_mask(sccb, 3, val)
struct read_cpu_info_sccb {
struct sccb_header header;
u16 nr_configured;
@ -221,15 +264,17 @@ extern int sclp_init_state;
extern int sclp_console_pages;
extern int sclp_console_drop;
extern unsigned long sclp_console_full;
extern bool sclp_mask_compat_mode;
extern char sclp_early_sccb[PAGE_SIZE];
void sclp_early_wait_irq(void);
int sclp_early_cmd(sclp_cmdw_t cmd, void *sccb);
unsigned int sclp_early_con_check_linemode(struct init_sccb *sccb);
unsigned int sclp_early_con_check_vt220(struct init_sccb *sccb);
int sclp_early_set_event_mask(struct init_sccb *sccb,
unsigned long receive_mask,
unsigned long send_mask);
sccb_mask_t receive_mask,
sccb_mask_t send_mask);
/* useful inlines */

2
drivers/s390/char/sclp_early.c
View file

@ -249,7 +249,7 @@ static void __init sclp_early_console_detect(struct init_sccb *sccb)
if (sccb->header.response_code != 0x20)
return;
if (sccb->sclp_send_mask & EVTYP_VT220MSG_MASK)
if (sclp_early_con_check_vt220(sccb))
sclp.has_vt220 = 1;
if (sclp_early_con_check_linemode(sccb))

38
drivers/s390/char/sclp_early_core.c
View file

@ -14,6 +14,11 @@
char sclp_early_sccb[PAGE_SIZE] __aligned(PAGE_SIZE) __section(.data);
int sclp_init_state __section(.data) = sclp_init_state_uninitialized;
/*
* Used to keep track of the size of the event masks. Qemu until version 2.11
* only supports 4 and needs a workaround.
*/
bool sclp_mask_compat_mode;
void sclp_early_wait_irq(void)
{
@ -142,16 +147,24 @@ static void sclp_early_print_vt220(const char *str, unsigned int len)
}
int sclp_early_set_event_mask(struct init_sccb *sccb,
unsigned long receive_mask,
unsigned long send_mask)
sccb_mask_t receive_mask,
sccb_mask_t send_mask)
{
retry:
memset(sccb, 0, sizeof(*sccb));
sccb->header.length = sizeof(*sccb);
sccb->mask_length = sizeof(sccb_mask_t);
sccb->receive_mask = receive_mask;
sccb->send_mask = send_mask;
if (sclp_mask_compat_mode)
sccb->mask_length = SCLP_MASK_SIZE_COMPAT;
else
sccb->mask_length = sizeof(sccb_mask_t);
sccb_set_recv_mask(sccb, receive_mask);
sccb_set_send_mask(sccb, send_mask);
if (sclp_early_cmd(SCLP_CMDW_WRITE_EVENT_MASK, sccb))
return -EIO;
if ((sccb->header.response_code == 0x74f0) && !sclp_mask_compat_mode) {
sclp_mask_compat_mode = true;
goto retry;
}
if (sccb->header.response_code != 0x20)
return -EIO;
return 0;
@ -159,19 +172,28 @@ int sclp_early_set_event_mask(struct init_sccb *sccb,
unsigned int sclp_early_con_check_linemode(struct init_sccb *sccb)
{
if (!(sccb->sclp_send_mask & EVTYP_OPCMD_MASK))
if (!(sccb_get_sclp_send_mask(sccb) & EVTYP_OPCMD_MASK))
return 0;
if (!(sccb->sclp_receive_mask & (EVTYP_MSG_MASK | EVTYP_PMSGCMD_MASK)))
if (!(sccb_get_sclp_recv_mask(sccb) & (EVTYP_MSG_MASK | EVTYP_PMSGCMD_MASK)))
return 0;
return 1;
}
unsigned int sclp_early_con_check_vt220(struct init_sccb *sccb)
{
if (sccb_get_sclp_send_mask(sccb) & EVTYP_VT220MSG_MASK)
return 1;
return 0;
}
static int sclp_early_setup(int disable, int *have_linemode, int *have_vt220)
{
unsigned long receive_mask, send_mask;
struct init_sccb *sccb;
int rc;
BUILD_BUG_ON(sizeof(struct init_sccb) > PAGE_SIZE);
*have_linemode = *have_vt220 = 0;
sccb = (struct init_sccb *) &sclp_early_sccb;
receive_mask = disable ? 0 : EVTYP_OPCMD_MASK;
@ -180,7 +202,7 @@ static int sclp_early_setup(int disable, int *have_linemode, int *have_vt220)
if (rc)
return rc;
*have_linemode = sclp_early_con_check_linemode(sccb);
*have_vt220 = sccb->send_mask & EVTYP_VT220MSG_MASK;
*have_vt220 = !!(sccb_get_send_mask(sccb) & EVTYP_VT220MSG_MASK);
return rc;
}

569
drivers/s390/char/sclp_sd.c Normal file
View file

@ -0,0 +1,569 @@
// SPDX-License-Identifier: GPL-2.0
/*
* SCLP Store Data support and sysfs interface
*
* Copyright IBM Corp. 2017
*/
#define KMSG_COMPONENT "sclp_sd"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/completion.h>
#include <linux/kobject.h>
#include <linux/list.h>
#include <linux/printk.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/async.h>
#include <linux/export.h>
#include <linux/mutex.h>
#include <asm/pgalloc.h>
#include "sclp.h"
#define SD_EQ_STORE_DATA 0
#define SD_EQ_HALT 1
#define SD_EQ_SIZE 2
#define SD_DI_CONFIG 3
struct sclp_sd_evbuf {
struct evbuf_header hdr;
u8 eq;
u8 di;
u8 rflags;
u64 :56;
u32 id;
u16 :16;
u8 fmt;
u8 status;
u64 sat;
u64 sa;
u32 esize;
u32 dsize;
} __packed;
struct sclp_sd_sccb {
struct sccb_header hdr;
struct sclp_sd_evbuf evbuf;
} __packed __aligned(PAGE_SIZE);
/**
* struct sclp_sd_data - Result of a Store Data request
* @esize_bytes: Resulting esize in bytes
* @dsize_bytes: Resulting dsize in bytes
* @data: Pointer to data - must be released using vfree()
*/
struct sclp_sd_data {
size_t esize_bytes;
size_t dsize_bytes;
void *data;
};
/**
* struct sclp_sd_listener - Listener for asynchronous Store Data response
* @list: For enqueueing this struct
* @id: Event ID of response to listen for
* @completion: Can be used to wait for response
* @evbuf: Contains the resulting Store Data response after completion
*/
struct sclp_sd_listener {
struct list_head list;
u32 id;
struct completion completion;
struct sclp_sd_evbuf evbuf;
};
/**
* struct sclp_sd_file - Sysfs representation of a Store Data entity
* @kobj: Kobject
* @data_attr: Attribute for accessing data contents
* @data_mutex: Mutex to serialize access and updates to @data
* @data: Data associated with this entity
* @di: DI value associated with this entity
*/
struct sclp_sd_file {
struct kobject kobj;
struct bin_attribute data_attr;
struct mutex data_mutex;
struct sclp_sd_data data;
u8 di;
};
#define to_sd_file(x) container_of(x, struct sclp_sd_file, kobj)
static struct kset *sclp_sd_kset;
static struct sclp_sd_file *config_file;
static LIST_HEAD(sclp_sd_queue);
static DEFINE_SPINLOCK(sclp_sd_queue_lock);
/**
* sclp_sd_listener_add() - Add listener for Store Data responses
* @listener: Listener to add
*/
static void sclp_sd_listener_add(struct sclp_sd_listener *listener)
{
spin_lock_irq(&sclp_sd_queue_lock);
list_add_tail(&listener->list, &sclp_sd_queue);
spin_unlock_irq(&sclp_sd_queue_lock);
}
/**
* sclp_sd_listener_remove() - Remove listener for Store Data responses
* @listener: Listener to remove
*/
static void sclp_sd_listener_remove(struct sclp_sd_listener *listener)
{
spin_lock_irq(&sclp_sd_queue_lock);
list_del(&listener->list);
spin_unlock_irq(&sclp_sd_queue_lock);
}
/**
* sclp_sd_listener_init() - Initialize a Store Data response listener
* @id: Event ID to listen for
*
* Initialize a listener for asynchronous Store Data responses. This listener
* can afterwards be used to wait for a specific response and to retrieve
* the associated response data.
*/
static void sclp_sd_listener_init(struct sclp_sd_listener *listener, u32 id)
{
memset(listener, 0, sizeof(*listener));
listener->id = id;
init_completion(&listener->completion);
}
/**
* sclp_sd_receiver() - Receiver for Store Data events
* @evbuf_hdr: Header of received events
*
* Process Store Data events and complete listeners with matching event IDs.
*/
static void sclp_sd_receiver(struct evbuf_header *evbuf_hdr)
{
struct sclp_sd_evbuf *evbuf = (struct sclp_sd_evbuf *) evbuf_hdr;
struct sclp_sd_listener *listener;
int found = 0;
pr_debug("received event (id=0x%08x)\n", evbuf->id);
spin_lock(&sclp_sd_queue_lock);
list_for_each_entry(listener, &sclp_sd_queue, list) {
if (listener->id != evbuf->id)
continue;
listener->evbuf = *evbuf;
complete(&listener->completion);
found = 1;
break;
}
spin_unlock(&sclp_sd_queue_lock);
if (!found)
pr_debug("unsolicited event (id=0x%08x)\n", evbuf->id);
}
static struct sclp_register sclp_sd_register = {
.send_mask = EVTYP_STORE_DATA_MASK,
.receive_mask = EVTYP_STORE_DATA_MASK,
.receiver_fn = sclp_sd_receiver,
};
/**
* sclp_sd_sync() - Perform Store Data request synchronously
* @page: Address of work page - must be below 2GB
* @eq: Input EQ value
* @di: Input DI value
* @sat: Input SAT value
* @sa: Input SA value used to specify the address of the target buffer
* @dsize_ptr: Optional pointer to input and output DSIZE value
* @esize_ptr: Optional pointer to output ESIZE value
*
* Perform Store Data request with specified parameters and wait for completion.
*
* Return %0 on success and store resulting DSIZE and ESIZE values in
* @dsize_ptr and @esize_ptr (if provided). Return non-zero on error.
*/
static int sclp_sd_sync(unsigned long page, u8 eq, u8 di, u64 sat, u64 sa,
u32 *dsize_ptr, u32 *esize_ptr)
{
struct sclp_sd_sccb *sccb = (void *) page;
struct sclp_sd_listener listener;
struct sclp_sd_evbuf *evbuf;
int rc;
sclp_sd_listener_init(&listener, (u32) (addr_t) sccb);
sclp_sd_listener_add(&listener);
/* Prepare SCCB */
memset(sccb, 0, PAGE_SIZE);
sccb->hdr.length = sizeof(sccb->hdr) + sizeof(sccb->evbuf);
evbuf = &sccb->evbuf;
evbuf->hdr.length = sizeof(*evbuf);
evbuf->hdr.type = EVTYP_STORE_DATA;
evbuf->eq = eq;
evbuf->di = di;
evbuf->id = listener.id;
evbuf->fmt = 1;
evbuf->sat = sat;
evbuf->sa = sa;
if (dsize_ptr)
evbuf->dsize = *dsize_ptr;
/* Perform command */
pr_debug("request (eq=%d, di=%d, id=0x%08x)\n", eq, di, listener.id);
rc = sclp_sync_request(SCLP_CMDW_WRITE_EVENT_DATA, sccb);
pr_debug("request done (rc=%d)\n", rc);
if (rc)
goto out;
/* Evaluate response */
if (sccb->hdr.response_code == 0x73f0) {
pr_debug("event not supported\n");
rc = -EIO;
goto out_remove;
}
if (sccb->hdr.response_code != 0x0020 || !(evbuf->hdr.flags & 0x80)) {
rc = -EIO;
goto out;
}
if (!(evbuf->rflags & 0x80)) {
rc = wait_for_completion_interruptible(&listener.completion);
if (rc)
goto out;
evbuf = &listener.evbuf;
}
switch (evbuf->status) {
case 0:
if (dsize_ptr)
*dsize_ptr = evbuf->dsize;
if (esize_ptr)
*esize_ptr = evbuf->esize;
pr_debug("success (dsize=%u, esize=%u)\n", evbuf->dsize,
evbuf->esize);
break;
case 3:
rc = -ENOENT;
break;
default:
rc = -EIO;
break;
}
out:
if (rc && rc != -ENOENT) {
/* Provide some information about what went wrong */
pr_warn("Store Data request failed (eq=%d, di=%d, "
"response=0x%04x, flags=0x%02x, status=%d, rc=%d)\n",
eq, di, sccb->hdr.response_code, evbuf->hdr.flags,
evbuf->status, rc);
}
out_remove:
sclp_sd_listener_remove(&listener);
return rc;
}
/**
* sclp_sd_store_data() - Obtain data for specified Store Data entity
* @result: Resulting data
* @di: DI value associated with this entity
*
* Perform a series of Store Data requests to obtain the size and contents of
* the specified Store Data entity.
*
* Return:
* %0: Success - result is stored in @result. @result->data must be
* released using vfree() after use.
* %-ENOENT: No data available for this entity
* %<0: Other error
*/
static int sclp_sd_store_data(struct sclp_sd_data *result, u8 di)
{
u32 dsize = 0, esize = 0;
unsigned long page, asce = 0;
void *data = NULL;
int rc;
page = __get_free_page(GFP_KERNEL | GFP_DMA);
if (!page)
return -ENOMEM;
/* Get size */
rc = sclp_sd_sync(page, SD_EQ_SIZE, di, 0, 0, &dsize, &esize);
if (rc)
goto out;
if (dsize == 0)
goto out_result;
/* Allocate memory */
data = vzalloc((size_t) dsize * PAGE_SIZE);
if (!data) {
rc = -ENOMEM;
goto out;
}
/* Get translation table for buffer */
asce = base_asce_alloc((unsigned long) data, dsize);
if (!asce) {
vfree(data);
rc = -ENOMEM;
goto out;
}
/* Get data */
rc = sclp_sd_sync(page, SD_EQ_STORE_DATA, di, asce, (u64) data, &dsize,
&esize);
if (rc) {
/* Cancel running request if interrupted */
if (rc == -ERESTARTSYS)
sclp_sd_sync(page, SD_EQ_HALT, di, 0, 0, NULL, NULL);
vfree(data);
goto out;
}
out_result:
result->esize_bytes = (size_t) esize * PAGE_SIZE;
result->dsize_bytes = (size_t) dsize * PAGE_SIZE;
result->data = data;
out:
base_asce_free(asce);
free_page(page);
return rc;
}
/**
* sclp_sd_data_reset() - Reset Store Data result buffer
* @data: Data buffer to reset
*
* Reset @data to initial state and release associated memory.
*/
static void sclp_sd_data_reset(struct sclp_sd_data *data)
{
vfree(data->data);
data->data = NULL;
data->dsize_bytes = 0;
data->esize_bytes = 0;
}
/**
* sclp_sd_file_release() - Release function for sclp_sd_file object
* @kobj: Kobject embedded in sclp_sd_file object
*/
static void sclp_sd_file_release(struct kobject *kobj)
{
struct sclp_sd_file *sd_file = to_sd_file(kobj);
sclp_sd_data_reset(&sd_file->data);
kfree(sd_file);
}
/**
* sclp_sd_file_update() - Update contents of sclp_sd_file object
* @sd_file: Object to update
*
* Obtain the current version of data associated with the Store Data entity
* @sd_file.
*
* On success, return %0 and generate a KOBJ_CHANGE event to indicate that the
* data may have changed. Return non-zero otherwise.
*/
static int sclp_sd_file_update(struct sclp_sd_file *sd_file)
{
const char *name = kobject_name(&sd_file->kobj);
struct sclp_sd_data data;
int rc;
rc = sclp_sd_store_data(&data, sd_file->di);
if (rc) {
if (rc == -ENOENT) {
pr_info("No data is available for the %s data entity\n",
name);
}
return rc;
}
mutex_lock(&sd_file->data_mutex);
sclp_sd_data_reset(&sd_file->data);
sd_file->data = data;
mutex_unlock(&sd_file->data_mutex);
pr_info("A %zu-byte %s data entity was retrieved\n", data.dsize_bytes,
name);
kobject_uevent(&sd_file->kobj, KOBJ_CHANGE);
return 0;
}
/**
* sclp_sd_file_update_async() - Wrapper for asynchronous update call
* @data: Object to update
*/
static void sclp_sd_file_update_async(void *data, async_cookie_t cookie)
{
struct sclp_sd_file *sd_file = data;
sclp_sd_file_update(sd_file);
}
/**
* reload_store() - Store function for "reload" sysfs attribute
* @kobj: Kobject of sclp_sd_file object
*
* Initiate a reload of the data associated with an sclp_sd_file object.
*/
static ssize_t reload_store(struct kobject *kobj, struct kobj_attribute *attr,
const char *buf, size_t count)
{
struct sclp_sd_file *sd_file = to_sd_file(kobj);
sclp_sd_file_update(sd_file);
return count;
}
static struct kobj_attribute reload_attr = __ATTR_WO(reload);
static struct attribute *sclp_sd_file_default_attrs[] = {
&reload_attr.attr,
NULL,
};
static struct kobj_type sclp_sd_file_ktype = {
.sysfs_ops = &kobj_sysfs_ops,
.release = sclp_sd_file_release,
.default_attrs = sclp_sd_file_default_attrs,
};
/**
* data_read() - Read function for "read" sysfs attribute
* @kobj: Kobject of sclp_sd_file object
* @buffer: Target buffer
* @off: Requested file offset
* @size: Requested number of bytes
*
* Store the requested portion of the Store Data entity contents into the
* specified buffer. Return the number of bytes stored on success, or %0
* on EOF.
*/
static ssize_t data_read(struct file *file, struct kobject *kobj,
struct bin_attribute *attr, char *buffer,
loff_t off, size_t size)
{
struct sclp_sd_file *sd_file = to_sd_file(kobj);
size_t data_size;
char *data;
mutex_lock(&sd_file->data_mutex);
data = sd_file->data.data;
data_size = sd_file->data.dsize_bytes;
if (!data || off >= data_size) {
size = 0;
} else {
if (off + size > data_size)
size = data_size - off;
memcpy(buffer, data + off, size);
}
mutex_unlock(&sd_file->data_mutex);
return size;
}
/**
* sclp_sd_file_create() - Add a sysfs file representing a Store Data entity
* @name: Name of file
* @di: DI value associated with this entity
*
* Create a sysfs directory with the given @name located under
*
* /sys/firmware/sclp_sd/
*
* The files in this directory can be used to access the contents of the Store
* Data entity associated with @DI.
*
* Return pointer to resulting sclp_sd_file object on success, %NULL otherwise.
* The object must be freed by calling kobject_put() on the embedded kobject
* pointer after use.
*/
static __init struct sclp_sd_file *sclp_sd_file_create(const char *name, u8 di)
{
struct sclp_sd_file *sd_file;
int rc;
sd_file = kzalloc(sizeof(*sd_file), GFP_KERNEL);
if (!sd_file)
return NULL;
sd_file->di = di;
mutex_init(&sd_file->data_mutex);
/* Create kobject located under /sys/firmware/sclp_sd/ */
sd_file->kobj.kset = sclp_sd_kset;
rc = kobject_init_and_add(&sd_file->kobj, &sclp_sd_file_ktype, NULL,
"%s", name);
if (rc) {
kobject_put(&sd_file->kobj);
return NULL;
}
sysfs_bin_attr_init(&sd_file->data_attr);
sd_file->data_attr.attr.name = "data";
sd_file->data_attr.attr.mode = 0444;
sd_file->data_attr.read = data_read;
rc = sysfs_create_bin_file(&sd_file->kobj, &sd_file->data_attr);
if (rc) {
kobject_put(&sd_file->kobj);
return NULL;
}
/*
* For completeness only - users interested in entity data should listen
* for KOBJ_CHANGE instead.
*/
kobject_uevent(&sd_file->kobj, KOBJ_ADD);
/* Don't let a slow Store Data request delay further initialization */
async_schedule(sclp_sd_file_update_async, sd_file);
return sd_file;
}
/**
* sclp_sd_init() - Initialize sclp_sd support and register sysfs files
*/
static __init int sclp_sd_init(void)
{
int rc;
rc = sclp_register(&sclp_sd_register);
if (rc)
return rc;
/* Create kset named "sclp_sd" located under /sys/firmware/ */
rc = -ENOMEM;
sclp_sd_kset = kset_create_and_add("sclp_sd", NULL, firmware_kobj);
if (!sclp_sd_kset)
goto err_kset;
rc = -EINVAL;
config_file = sclp_sd_file_create("config", SD_DI_CONFIG);
if (!config_file)
goto err_config;
return 0;
err_config:
kset_unregister(sclp_sd_kset);
err_kset:
sclp_unregister(&sclp_sd_register);
return rc;
}
device_initcall(sclp_sd_init);

5
drivers/s390/char/sclp_tty.c
View file

@ -502,7 +502,10 @@ sclp_tty_init(void)
int i;
int rc;
if (!CONSOLE_IS_SCLP)
/* z/VM multiplexes the line mode output on the 32xx screen */
if (MACHINE_IS_VM && !CONSOLE_IS_SCLP)
return 0;
if (!sclp.has_linemode)
return 0;
driver = alloc_tty_driver(1);
if (!driver)

34
drivers/s390/cio/chp.c
View file

@ -384,6 +384,28 @@ static ssize_t chp_chid_external_show(struct device *dev,
}
static DEVICE_ATTR(chid_external, 0444, chp_chid_external_show, NULL);
static ssize_t util_string_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *attr, char *buf,
loff_t off, size_t count)
{
struct channel_path *chp = to_channelpath(kobj_to_dev(kobj));
ssize_t rc;
mutex_lock(&chp->lock);
rc = memory_read_from_buffer(buf, count, &off, chp->desc_fmt3.util_str,
sizeof(chp->desc_fmt3.util_str));
mutex_unlock(&chp->lock);
return rc;
}
static BIN_ATTR_RO(util_string,
sizeof(((struct channel_path_desc_fmt3 *)0)->util_str));
static struct bin_attribute *chp_bin_attrs[] = {
&bin_attr_util_string,
NULL,
};
static struct attribute *chp_attrs[] = {
&dev_attr_status.attr,
&dev_attr_configure.attr,
@ -396,6 +418,7 @@ static struct attribute *chp_attrs[] = {
};
static struct attribute_group chp_attr_group = {
.attrs = chp_attrs,
.bin_attrs = chp_bin_attrs,
};
static const struct attribute_group *chp_attr_groups[] = {
&chp_attr_group,
@ -422,7 +445,7 @@ int chp_update_desc(struct channel_path *chp)
{
int rc;
rc = chsc_determine_base_channel_path_desc(chp->chpid, &chp->desc);
rc = chsc_determine_fmt0_channel_path_desc(chp->chpid, &chp->desc);
if (rc)
return rc;
@ -431,6 +454,7 @@ int chp_update_desc(struct channel_path *chp)
* hypervisors implement the required chsc commands.
*/
chsc_determine_fmt1_channel_path_desc(chp->chpid, &chp->desc_fmt1);
chsc_determine_fmt3_channel_path_desc(chp->chpid, &chp->desc_fmt3);
chsc_get_channel_measurement_chars(chp);
return 0;
@ -506,20 +530,20 @@ out:
* On success return a newly allocated copy of the channel-path description
* data associated with the given channel-path ID. Return %NULL on error.
*/
struct channel_path_desc *chp_get_chp_desc(struct chp_id chpid)
struct channel_path_desc_fmt0 *chp_get_chp_desc(struct chp_id chpid)
{
struct channel_path *chp;
struct channel_path_desc *desc;
struct channel_path_desc_fmt0 *desc;
chp = chpid_to_chp(chpid);
if (!chp)
return NULL;
desc = kmalloc(sizeof(struct channel_path_desc), GFP_KERNEL);
desc = kmalloc(sizeof(*desc), GFP_KERNEL);
if (!desc)
return NULL;
mutex_lock(&chp->lock);
memcpy(desc, &chp->desc, sizeof(struct channel_path_desc));
memcpy(desc, &chp->desc, sizeof(*desc));
mutex_unlock(&chp->lock);
return desc;
}

5
drivers/s390/cio/chp.h
View file

@ -44,8 +44,9 @@ struct channel_path {
struct chp_id chpid;
struct mutex lock; /* Serialize access to below members. */
int state;
struct channel_path_desc desc;
struct channel_path_desc_fmt0 desc;
struct channel_path_desc_fmt1 desc_fmt1;
struct channel_path_desc_fmt3 desc_fmt3;
/* Channel-measurement related stuff: */
int cmg;
int shared;
@ -61,7 +62,7 @@ static inline struct channel_path *chpid_to_chp(struct chp_id chpid)
int chp_get_status(struct chp_id chpid);
u8 chp_get_sch_opm(struct subchannel *sch);
int chp_is_registered(struct chp_id chpid);
struct channel_path_desc *chp_get_chp_desc(struct chp_id chpid);
struct channel_path_desc_fmt0 *chp_get_chp_desc(struct chp_id chpid);
void chp_remove_cmg_attr(struct channel_path *chp);
int chp_add_cmg_attr(struct channel_path *chp);
int chp_update_desc(struct channel_path *chp);

59
drivers/s390/cio/chsc.c
View file

@ -915,6 +915,8 @@ int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt,
return -EINVAL;
if ((rfmt == 2) && !css_general_characteristics.cib)
return -EINVAL;
if ((rfmt == 3) && !css_general_characteristics.util_str)
return -EINVAL;
memset(page, 0, PAGE_SIZE);
scpd_area = page;
@ -940,43 +942,30 @@ int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt,
}
EXPORT_SYMBOL_GPL(chsc_determine_channel_path_desc);
int chsc_determine_base_channel_path_desc(struct chp_id chpid,
struct channel_path_desc *desc)
{
struct chsc_scpd *scpd_area;
unsigned long flags;
int ret;
spin_lock_irqsave(&chsc_page_lock, flags);
scpd_area = chsc_page;
ret = chsc_determine_channel_path_desc(chpid, 0, 0, 0, 0, scpd_area);
if (ret)
goto out;
memcpy(desc, scpd_area->data, sizeof(*desc));
out:
spin_unlock_irqrestore(&chsc_page_lock, flags);
return ret;
#define chsc_det_chp_desc(FMT, c) \
int chsc_determine_fmt##FMT##_channel_path_desc( \
struct chp_id chpid, struct channel_path_desc_fmt##FMT *desc) \
{ \
struct chsc_scpd *scpd_area; \
unsigned long flags; \
int ret; \
\
spin_lock_irqsave(&chsc_page_lock, flags); \
scpd_area = chsc_page; \
ret = chsc_determine_channel_path_desc(chpid, 0, FMT, c, 0, \
scpd_area); \
if (ret) \
goto out; \
\
memcpy(desc, scpd_area->data, sizeof(*desc)); \
out: \
spin_unlock_irqrestore(&chsc_page_lock, flags); \
return ret; \
}
int chsc_determine_fmt1_channel_path_desc(struct chp_id chpid,
struct channel_path_desc_fmt1 *desc)
{
struct chsc_scpd *scpd_area;
unsigned long flags;
int ret;
spin_lock_irqsave(&chsc_page_lock, flags);
scpd_area = chsc_page;
ret = chsc_determine_channel_path_desc(chpid, 0, 1, 1, 0, scpd_area);
if (ret)
goto out;
memcpy(desc, scpd_area->data, sizeof(*desc));
out:
spin_unlock_irqrestore(&chsc_page_lock, flags);
return ret;
}
chsc_det_chp_desc(0, 0)
chsc_det_chp_desc(1, 1)
chsc_det_chp_desc(3, 0)
static void
chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv,

11
drivers/s390/cio/chsc.h
View file

@ -40,6 +40,11 @@ struct channel_path_desc_fmt1 {
u32 zeros[2];
} __attribute__ ((packed));
struct channel_path_desc_fmt3 {
struct channel_path_desc_fmt1 fmt1_desc;
u8 util_str[64];
};
struct channel_path;
struct css_chsc_char {
@ -147,10 +152,12 @@ int __chsc_do_secm(struct channel_subsystem *css, int enable);
int chsc_chp_vary(struct chp_id chpid, int on);
int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt,
int c, int m, void *page);
int chsc_determine_base_channel_path_desc(struct chp_id chpid,
struct channel_path_desc *desc);
int chsc_determine_fmt0_channel_path_desc(struct chp_id chpid,
struct channel_path_desc_fmt0 *desc);
int chsc_determine_fmt1_channel_path_desc(struct chp_id chpid,
struct channel_path_desc_fmt1 *desc);
int chsc_determine_fmt3_channel_path_desc(struct chp_id chpid,
struct channel_path_desc_fmt3 *desc);
void chsc_chp_online(struct chp_id chpid);
void chsc_chp_offline(struct chp_id chpid);
int chsc_get_channel_measurement_chars(struct channel_path *chp);

16
drivers/s390/cio/device.c
View file

@ -1073,8 +1073,7 @@ out_schedule:
return 0;
}
static int
io_subchannel_remove (struct subchannel *sch)
static int io_subchannel_remove(struct subchannel *sch)
{
struct io_subchannel_private *io_priv = to_io_private(sch);
struct ccw_device *cdev;
@ -1082,14 +1081,12 @@ io_subchannel_remove (struct subchannel *sch)
cdev = sch_get_cdev(sch);
if (!cdev)
goto out_free;
io_subchannel_quiesce(sch);
/* Set ccw device to not operational and drop reference. */
spin_lock_irq(cdev->ccwlock);
ccw_device_unregister(cdev);
spin_lock_irq(sch->lock);
sch_set_cdev(sch, NULL);
set_io_private(sch, NULL);
cdev->private->state = DEV_STATE_NOT_OPER;
spin_unlock_irq(cdev->ccwlock);
ccw_device_unregister(cdev);
spin_unlock_irq(sch->lock);
out_free:
kfree(io_priv);
sysfs_remove_group(&sch->dev.kobj, &io_subchannel_attr_group);
@ -1721,6 +1718,7 @@ static int ccw_device_remove(struct device *dev)
{
struct ccw_device *cdev = to_ccwdev(dev);
struct ccw_driver *cdrv = cdev->drv;
struct subchannel *sch;
int ret;
if (cdrv->remove)
@ -1746,7 +1744,9 @@ static int ccw_device_remove(struct device *dev)
ccw_device_set_timeout(cdev, 0);
cdev->drv = NULL;
cdev->private->int_class = IRQIO_CIO;
sch = to_subchannel(cdev->dev.parent);
spin_unlock_irq(cdev->ccwlock);
io_subchannel_quiesce(sch);
__disable_cmf(cdev);
return 0;

4
drivers/s390/cio/device_ops.c
View file

@ -460,8 +460,8 @@ __u8 ccw_device_get_path_mask(struct ccw_device *cdev)
* On success return a newly allocated copy of the channel-path description
* data associated with the given channel path. Return %NULL on error.
*/
struct channel_path_desc *ccw_device_get_chp_desc(struct ccw_device *cdev,
int chp_idx)
struct channel_path_desc_fmt0 *ccw_device_get_chp_desc(struct ccw_device *cdev,
int chp_idx)
{
struct subchannel *sch;
struct chp_id chpid;

131
drivers/s390/cio/qdio_main.c
View file

@ -98,22 +98,6 @@ static inline int do_siga_output(unsigned long schid, unsigned long mask,
return cc;
}
static inline int qdio_check_ccq(struct qdio_q *q, unsigned int ccq)
{
/* all done or next buffer state different */
if (ccq == 0 || ccq == 32)
return 0;
/* no buffer processed */
if (ccq == 97)
return 1;
/* not all buffers processed */
if (ccq == 96)
return 2;
/* notify devices immediately */
DBF_ERROR("%4x ccq:%3d", SCH_NO(q), ccq);
return -EIO;
}
/**
* qdio_do_eqbs - extract buffer states for QEBSM
* @q: queue to manipulate
@ -128,7 +112,7 @@ static inline int qdio_check_ccq(struct qdio_q *q, unsigned int ccq)
static int qdio_do_eqbs(struct qdio_q *q, unsigned char *state,
int start, int count, int auto_ack)
{
int rc, tmp_count = count, tmp_start = start, nr = q->nr, retried = 0;
int tmp_count = count, tmp_start = start, nr = q->nr;
unsigned int ccq = 0;
qperf_inc(q, eqbs);
@ -138,34 +122,30 @@ static int qdio_do_eqbs(struct qdio_q *q, unsigned char *state,
again:
ccq = do_eqbs(q->irq_ptr->sch_token, state, nr, &tmp_start, &tmp_count,
auto_ack);
rc = qdio_check_ccq(q, ccq);
if (!rc)
switch (ccq) {
case 0:
case 32:
/* all done, or next buffer state different */
return count - tmp_count;
if (rc == 1) {
DBF_DEV_EVENT(DBF_WARN, q->irq_ptr, "EQBS again:%2d", ccq);
goto again;
}
if (rc == 2) {
case 96:
/* not all buffers processed */
qperf_inc(q, eqbs_partial);
DBF_DEV_EVENT(DBF_WARN, q->irq_ptr, "EQBS part:%02x",
tmp_count);
/*
* Retry once, if that fails bail out and process the
* extracted buffers before trying again.
*/
if (!retried++)
goto again;
else
return count - tmp_count;
return count - tmp_count;
case 97:
/* no buffer processed */
DBF_DEV_EVENT(DBF_WARN, q->irq_ptr, "EQBS again:%2d", ccq);
goto again;
default:
DBF_ERROR("%4x ccq:%3d", SCH_NO(q), ccq);
DBF_ERROR("%4x EQBS ERROR", SCH_NO(q));
DBF_ERROR("%3d%3d%2d", count, tmp_count, nr);
q->handler(q->irq_ptr->cdev, QDIO_ERROR_GET_BUF_STATE, q->nr,
q->first_to_kick, count, q->irq_ptr->int_parm);
return 0;
}
DBF_ERROR("%4x EQBS ERROR", SCH_NO(q));
DBF_ERROR("%3d%3d%2d", count, tmp_count, nr);
q->handler(q->irq_ptr->cdev, QDIO_ERROR_GET_BUF_STATE,
q->nr, q->first_to_kick, count, q->irq_ptr->int_parm);
return 0;
}
/**
@ -185,7 +165,6 @@ static int qdio_do_sqbs(struct qdio_q *q, unsigned char state, int start,
unsigned int ccq = 0;
int tmp_count = count, tmp_start = start;
int nr = q->nr;
int rc;
if (!count)
return 0;
@ -195,26 +174,32 @@ static int qdio_do_sqbs(struct qdio_q *q, unsigned char state, int start,
nr += q->irq_ptr->nr_input_qs;
again:
ccq = do_sqbs(q->irq_ptr->sch_token, state, nr, &tmp_start, &tmp_count);
rc = qdio_check_ccq(q, ccq);
if (!rc) {
switch (ccq) {
case 0:
case 32:
/* all done, or active buffer adapter-owned */
WARN_ON_ONCE(tmp_count);
return count - tmp_count;
}
if (rc == 1 || rc == 2) {
case 96:
/* not all buffers processed */
DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "SQBS again:%2d", ccq);
qperf_inc(q, sqbs_partial);
goto again;
default:
DBF_ERROR("%4x ccq:%3d", SCH_NO(q), ccq);
DBF_ERROR("%4x SQBS ERROR", SCH_NO(q));
DBF_ERROR("%3d%3d%2d", count, tmp_count, nr);
q->handler(q->irq_ptr->cdev, QDIO_ERROR_SET_BUF_STATE, q->nr,
q->first_to_kick, count, q->irq_ptr->int_parm);
return 0;
}
DBF_ERROR("%4x SQBS ERROR", SCH_NO(q));
DBF_ERROR("%3d%3d%2d", count, tmp_count, nr);
q->handler(q->irq_ptr->cdev, QDIO_ERROR_SET_BUF_STATE,
q->nr, q->first_to_kick, count, q->irq_ptr->int_parm);
return 0;
}
/* returns number of examined buffers and their common state in *state */
/*
* Returns number of examined buffers and their common state in *state.
* Requested number of buffers-to-examine must be > 0.
*/
static inline int get_buf_states(struct qdio_q *q, unsigned int bufnr,
unsigned char *state, unsigned int count,
int auto_ack, int merge_pending)
@ -225,17 +210,23 @@ static inline int get_buf_states(struct qdio_q *q, unsigned int bufnr,
if (is_qebsm(q))
return qdio_do_eqbs(q, state, bufnr, count, auto_ack);
for (i = 0; i < count; i++) {
if (!__state) {
__state = q->slsb.val[bufnr];
if (merge_pending && __state == SLSB_P_OUTPUT_PENDING)
__state = SLSB_P_OUTPUT_EMPTY;
} else if (merge_pending) {
if ((q->slsb.val[bufnr] & __state) != __state)
break;
} else if (q->slsb.val[bufnr] != __state)
break;
/* get initial state: */
__state = q->slsb.val[bufnr];
if (merge_pending && __state == SLSB_P_OUTPUT_PENDING)
__state = SLSB_P_OUTPUT_EMPTY;
for (i = 1; i < count; i++) {
bufnr = next_buf(bufnr);
/* merge PENDING into EMPTY: */
if (merge_pending &&
q->slsb.val[bufnr] == SLSB_P_OUTPUT_PENDING &&
__state == SLSB_P_OUTPUT_EMPTY)
continue;
/* stop if next state differs from initial state: */
if (q->slsb.val[bufnr] != __state)
break;
}
*state = __state;
return i;
@ -502,8 +493,8 @@ static inline void inbound_primed(struct qdio_q *q, int count)
static int get_inbound_buffer_frontier(struct qdio_q *q)
{
int count, stop;
unsigned char state = 0;
int count;
q->timestamp = get_tod_clock_fast();
@ -512,9 +503,7 @@ static int get_inbound_buffer_frontier(struct qdio_q *q)
* would return 0.
*/
count = min(atomic_read(&q->nr_buf_used), QDIO_MAX_BUFFERS_MASK);
stop = add_buf(q->first_to_check, count);
if (q->first_to_check == stop)
if (!count)
goto out;
/*
@ -734,8 +723,8 @@ void qdio_inbound_processing(unsigned long data)
static int get_outbound_buffer_frontier(struct qdio_q *q)
{
int count, stop;
unsigned char state = 0;
int count;
q->timestamp = get_tod_clock_fast();
@ -751,11 +740,11 @@ static int get_outbound_buffer_frontier(struct qdio_q *q)
* would return 0.
*/
count = min(atomic_read(&q->nr_buf_used), QDIO_MAX_BUFFERS_MASK);
stop = add_buf(q->first_to_check, count);
if (q->first_to_check == stop)
if (!count)
goto out;
count = get_buf_states(q, q->first_to_check, &state, count, 0, 1);
count = get_buf_states(q, q->first_to_check, &state, count, 0,
q->u.out.use_cq);
if (!count)
goto out;

5
drivers/s390/cio/vfio_ccw_fsm.c
View file

@ -124,6 +124,11 @@ static void fsm_io_request(struct vfio_ccw_private *private,
if (scsw->cmd.fctl & SCSW_FCTL_START_FUNC) {
orb = (union orb *)io_region->orb_area;
/* Don't try to build a cp if transport mode is specified. */
if (orb->tm.b) {
io_region->ret_code = -EOPNOTSUPP;
goto err_out;
}
io_region->ret_code = cp_init(&private->cp, mdev_dev(mdev),
orb);
if (io_region->ret_code)

2
drivers/s390/net/qeth_core_main.c
View file

@ -1369,7 +1369,7 @@ static void qeth_set_multiple_write_queues(struct qeth_card *card)
static void qeth_update_from_chp_desc(struct qeth_card *card)
{
struct ccw_device *ccwdev;
struct channel_path_desc *chp_dsc;
struct channel_path_desc_fmt0 *chp_dsc;
QETH_DBF_TEXT(SETUP, 2, "chp_desc");