[GIT PULL] s390 patches for 2.6.29 #2
From: Martin Schwidefsky
Date: Fri Jan 09 2009 - 06:49:38 EST
Hi Linus,
please pull from 'for-linus' branch of
git://git390.osdl.marist.edu/pub/scm/linux-2.6.git for-linus
to receive the following updates:
Heiko Carstens (5):
[S390] ptrace: no extern declarations for userspace
[S390] types: add/fix types.h include in header files
[S390] remove code for oldselect system call
[S390] vdso: compile fix
[S390] Use unsigned long long for u64 on 64bit.
Hendrik Brueckner (6):
[S390] hvc_iucv: Change IUCV term id and use one device as default
[S390] hvc_iucv: Limit rate of outgoing IUCV messages
[S390] hvc_iucv: Update function documentation
[S390] hvc_iucv: Refactor console and device initialization
[S390] hvc_iucv: Special handling of IUCV HVC devices
[S390] update documentation for hvc_iucv kernel parameter.
Holger Smolinski (1):
[S390] dasd: add device attribute to disable blocking on lost paths
Huang Weiyi (1):
[S390] gettimeofday.S: removed duplicated #includes
Jan Glauber (1):
[S390] qdio: fix broken pointer in case of CONFIG_DEBUG_FS is disabled
Kamalesh Babulal (1):
[S390] tape block: fix dependencies
Mike Frysinger (1):
[S390] asm-s390/posix_types.h: drop __USE_ALL usage
Stefan Weinhuber (1):
[S390] dasd: send change uevents for dasd block devices
Documentation/kernel-parameters.txt | 4 +-
arch/s390/include/asm/chpid.h | 2 +-
arch/s390/include/asm/chsc.h | 1 +
arch/s390/include/asm/cmb.h | 3 +
arch/s390/include/asm/dasd.h | 2 +
arch/s390/include/asm/kvm.h | 2 +-
arch/s390/include/asm/posix_types.h | 4 -
arch/s390/include/asm/ptrace.h | 7 +-
arch/s390/include/asm/qeth.h | 1 +
arch/s390/include/asm/schid.h | 2 +
arch/s390/include/asm/swab.h | 2 +-
arch/s390/include/asm/types.h | 6 +-
arch/s390/kernel/entry.h | 2 -
arch/s390/kernel/smp.c | 3 +-
arch/s390/kernel/sys_s390.c | 19 --
arch/s390/kernel/vdso.c | 3 +-
arch/s390/kernel/vdso32/gettimeofday.S | 4 -
arch/s390/kvm/diag.c | 2 +-
arch/s390/kvm/interrupt.c | 6 +-
arch/s390/kvm/priv.c | 2 +-
drivers/char/hvc_iucv.c | 420 ++++++++++++++++++++------------
drivers/s390/block/dasd.c | 21 ++-
drivers/s390/block/dasd_devmap.c | 48 ++++
drivers/s390/block/dasd_diag.c | 3 +-
drivers/s390/block/dasd_eckd.c | 3 +-
drivers/s390/block/dasd_fba.c | 3 +-
drivers/s390/char/Kconfig | 2 +-
drivers/s390/cio/qdio_debug.c | 2 +
28 files changed, 376 insertions(+), 203 deletions(-)
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index fb84902..ed0a724 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -829,8 +829,8 @@ and is between 256 and 4096 characters. It is defined in the file
hlt [BUGS=ARM,SH]
- hvc_iucv= [S390] Number of z/VM IUCV Hypervisor console (HVC)
- back-ends. Valid parameters: 0..8
+ hvc_iucv= [S390] Number of z/VM IUCV hypervisor console (HVC)
+ terminal devices. Valid values: 0..8
i8042.debug [HW] Toggle i8042 debug mode
i8042.direct [HW] Put keyboard port into non-translated mode
diff --git a/arch/s390/include/asm/chpid.h b/arch/s390/include/asm/chpid.h
index dfe3c7f..fc71d8a 100644
--- a/arch/s390/include/asm/chpid.h
+++ b/arch/s390/include/asm/chpid.h
@@ -9,7 +9,7 @@
#define _ASM_S390_CHPID_H _ASM_S390_CHPID_H
#include <linux/string.h>
-#include <asm/types.h>
+#include <linux/types.h>
#define __MAX_CHPID 255
diff --git a/arch/s390/include/asm/chsc.h b/arch/s390/include/asm/chsc.h
index d38d0cf..807997f 100644
--- a/arch/s390/include/asm/chsc.h
+++ b/arch/s390/include/asm/chsc.h
@@ -8,6 +8,7 @@
#ifndef _ASM_CHSC_H
#define _ASM_CHSC_H
+#include <linux/types.h>
#include <asm/chpid.h>
#include <asm/schid.h>
diff --git a/arch/s390/include/asm/cmb.h b/arch/s390/include/asm/cmb.h
index 5019685..39ae032 100644
--- a/arch/s390/include/asm/cmb.h
+++ b/arch/s390/include/asm/cmb.h
@@ -1,5 +1,8 @@
#ifndef S390_CMB_H
#define S390_CMB_H
+
+#include <linux/types.h>
+
/**
* struct cmbdata - channel measurement block data for user space
* @size: size of the stored data
diff --git a/arch/s390/include/asm/dasd.h b/arch/s390/include/asm/dasd.h
index 55b2b80..e2db6f1 100644
--- a/arch/s390/include/asm/dasd.h
+++ b/arch/s390/include/asm/dasd.h
@@ -14,6 +14,7 @@
#ifndef DASD_H
#define DASD_H
+#include <linux/types.h>
#include <linux/ioctl.h>
#define DASD_IOCTL_LETTER 'D'
@@ -78,6 +79,7 @@ typedef struct dasd_information2_t {
#define DASD_FEATURE_USEDIAG 0x02
#define DASD_FEATURE_INITIAL_ONLINE 0x04
#define DASD_FEATURE_ERPLOG 0x08
+#define DASD_FEATURE_FAILFAST 0x10
#define DASD_PARTN_BITS 2
diff --git a/arch/s390/include/asm/kvm.h b/arch/s390/include/asm/kvm.h
index d74002f..e1f5465 100644
--- a/arch/s390/include/asm/kvm.h
+++ b/arch/s390/include/asm/kvm.h
@@ -13,7 +13,7 @@
* Author(s): Carsten Otte <cotte@xxxxxxxxxx>
* Christian Borntraeger <borntraeger@xxxxxxxxxx>
*/
-#include <asm/types.h>
+#include <linux/types.h>
/* for KVM_GET_IRQCHIP and KVM_SET_IRQCHIP */
struct kvm_pic_state {
diff --git a/arch/s390/include/asm/posix_types.h b/arch/s390/include/asm/posix_types.h
index 397d93f..8cc113f 100644
--- a/arch/s390/include/asm/posix_types.h
+++ b/arch/s390/include/asm/posix_types.h
@@ -68,11 +68,7 @@ typedef unsigned short __kernel_old_dev_t;
#endif /* __s390x__ */
typedef struct {
-#if defined(__KERNEL__) || defined(__USE_ALL)
int val[2];
-#else /* !defined(__KERNEL__) && !defined(__USE_ALL)*/
- int __val[2];
-#endif /* !defined(__KERNEL__) && !defined(__USE_ALL)*/
} __kernel_fsid_t;
diff --git a/arch/s390/include/asm/ptrace.h b/arch/s390/include/asm/ptrace.h
index 5396f9f..8920025 100644
--- a/arch/s390/include/asm/ptrace.h
+++ b/arch/s390/include/asm/ptrace.h
@@ -272,12 +272,15 @@ typedef struct
#define PSW_ASC_SECONDARY 0x0000800000000000UL
#define PSW_ASC_HOME 0x0000C00000000000UL
-extern long psw_user32_bits;
-
#endif /* __s390x__ */
+#ifdef __KERNEL__
extern long psw_kernel_bits;
extern long psw_user_bits;
+#ifdef CONFIG_64BIT
+extern long psw_user32_bits;
+#endif
+#endif
/* This macro merges a NEW PSW mask specified by the user into
the currently active PSW mask CURRENT, modifying only those
diff --git a/arch/s390/include/asm/qeth.h b/arch/s390/include/asm/qeth.h
index 930d378..06cbd1e 100644
--- a/arch/s390/include/asm/qeth.h
+++ b/arch/s390/include/asm/qeth.h
@@ -10,6 +10,7 @@
*/
#ifndef __ASM_S390_QETH_IOCTL_H__
#define __ASM_S390_QETH_IOCTL_H__
+#include <linux/types.h>
#include <linux/ioctl.h>
#define SIOC_QETH_ARP_SET_NO_ENTRIES (SIOCDEVPRIVATE)
diff --git a/arch/s390/include/asm/schid.h b/arch/s390/include/asm/schid.h
index 825503c..3e4d401 100644
--- a/arch/s390/include/asm/schid.h
+++ b/arch/s390/include/asm/schid.h
@@ -1,6 +1,8 @@
#ifndef ASM_SCHID_H
#define ASM_SCHID_H
+#include <linux/types.h>
+
struct subchannel_id {
__u32 cssid : 8;
__u32 : 4;
diff --git a/arch/s390/include/asm/swab.h b/arch/s390/include/asm/swab.h
index bd9321a..eb18dc1 100644
--- a/arch/s390/include/asm/swab.h
+++ b/arch/s390/include/asm/swab.h
@@ -9,7 +9,7 @@
* Author(s): Martin Schwidefsky (schwidefsky@xxxxxxxxxx)
*/
-#include <asm/types.h>
+#include <linux/types.h>
#ifndef __s390x__
# define __SWAB_64_THRU_32__
diff --git a/arch/s390/include/asm/types.h b/arch/s390/include/asm/types.h
index 41c5476..3dc3fc2 100644
--- a/arch/s390/include/asm/types.h
+++ b/arch/s390/include/asm/types.h
@@ -9,11 +9,7 @@
#ifndef _S390_TYPES_H
#define _S390_TYPES_H
-#ifndef __s390x__
-# include <asm-generic/int-ll64.h>
-#else
-# include <asm-generic/int-l64.h>
-#endif
+#include <asm-generic/int-ll64.h>
#ifndef __ASSEMBLY__
diff --git a/arch/s390/kernel/entry.h b/arch/s390/kernel/entry.h
index 6b18963..a65afc9 100644
--- a/arch/s390/kernel/entry.h
+++ b/arch/s390/kernel/entry.h
@@ -54,7 +54,5 @@ long sys_sigreturn(void);
long sys_rt_sigreturn(void);
long sys32_sigreturn(void);
long sys32_rt_sigreturn(void);
-long old_select(struct sel_arg_struct __user *arg);
-long sys_ptrace(long request, long pid, long addr, long data);
#endif /* _ENTRY_H */
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 9c0ccb5..2d337cb 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -685,7 +685,8 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
if (MACHINE_HAS_IEEE)
lowcore->extended_save_area_addr = (u32) save_area;
#else
- BUG_ON(vdso_alloc_per_cpu(smp_processor_id(), lowcore));
+ if (vdso_alloc_per_cpu(smp_processor_id(), lowcore))
+ BUG();
#endif
set_prefix((u32)(unsigned long) lowcore);
local_mcck_enable();
diff --git a/arch/s390/kernel/sys_s390.c b/arch/s390/kernel/sys_s390.c
index 4fe952e..c34be45 100644
--- a/arch/s390/kernel/sys_s390.c
+++ b/arch/s390/kernel/sys_s390.c
@@ -103,25 +103,6 @@ out:
return error;
}
-#ifndef CONFIG_64BIT
-struct sel_arg_struct {
- unsigned long n;
- fd_set __user *inp, *outp, *exp;
- struct timeval __user *tvp;
-};
-
-asmlinkage long old_select(struct sel_arg_struct __user *arg)
-{
- struct sel_arg_struct a;
-
- if (copy_from_user(&a, arg, sizeof(a)))
- return -EFAULT;
- /* sys_select() does the appropriate kernel locking */
- return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp);
-
-}
-#endif /* CONFIG_64BIT */
-
/*
* sys_ipc() is the de-multiplexer for the SysV IPC calls..
*
diff --git a/arch/s390/kernel/vdso.c b/arch/s390/kernel/vdso.c
index 25a6a82..690e178 100644
--- a/arch/s390/kernel/vdso.c
+++ b/arch/s390/kernel/vdso.c
@@ -322,7 +322,8 @@ static int __init vdso_init(void)
vdso64_pagelist[vdso64_pages - 1] = virt_to_page(vdso_data);
vdso64_pagelist[vdso64_pages] = NULL;
#ifndef CONFIG_SMP
- BUG_ON(vdso_alloc_per_cpu(0, S390_lowcore));
+ if (vdso_alloc_per_cpu(0, &S390_lowcore))
+ BUG();
#endif
vdso_init_cr5();
#endif /* CONFIG_64BIT */
diff --git a/arch/s390/kernel/vdso32/gettimeofday.S b/arch/s390/kernel/vdso32/gettimeofday.S
index c32f29c..ad8acfc 100644
--- a/arch/s390/kernel/vdso32/gettimeofday.S
+++ b/arch/s390/kernel/vdso32/gettimeofday.S
@@ -13,10 +13,6 @@
#include <asm/asm-offsets.h>
#include <asm/unistd.h>
-#include <asm/vdso.h>
-#include <asm/asm-offsets.h>
-#include <asm/unistd.h>
-
.text
.align 4
.globl __kernel_gettimeofday
diff --git a/arch/s390/kvm/diag.c b/arch/s390/kvm/diag.c
index a0775e1..8300309 100644
--- a/arch/s390/kvm/diag.c
+++ b/arch/s390/kvm/diag.c
@@ -47,7 +47,7 @@ static int __diag_ipl_functions(struct kvm_vcpu *vcpu)
vcpu->run->s390_reset_flags |= KVM_S390_RESET_IPL;
vcpu->run->s390_reset_flags |= KVM_S390_RESET_CPU_INIT;
vcpu->run->exit_reason = KVM_EXIT_S390_RESET;
- VCPU_EVENT(vcpu, 3, "requesting userspace resets %lx",
+ VCPU_EVENT(vcpu, 3, "requesting userspace resets %llx",
vcpu->run->s390_reset_flags);
return -EREMOTE;
}
diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c
index 2960702..f4fe28a 100644
--- a/arch/s390/kvm/interrupt.c
+++ b/arch/s390/kvm/interrupt.c
@@ -160,7 +160,7 @@ static void __do_deliver_interrupt(struct kvm_vcpu *vcpu,
break;
case KVM_S390_INT_VIRTIO:
- VCPU_EVENT(vcpu, 4, "interrupt: virtio parm:%x,parm64:%lx",
+ VCPU_EVENT(vcpu, 4, "interrupt: virtio parm:%x,parm64:%llx",
inti->ext.ext_params, inti->ext.ext_params2);
vcpu->stat.deliver_virtio_interrupt++;
rc = put_guest_u16(vcpu, __LC_EXT_INT_CODE, 0x2603);
@@ -360,7 +360,7 @@ int kvm_s390_handle_wait(struct kvm_vcpu *vcpu)
vcpu->arch.ckc_timer.expires = jiffies + sltime;
add_timer(&vcpu->arch.ckc_timer);
- VCPU_EVENT(vcpu, 5, "enabled wait timer:%lx jiffies", sltime);
+ VCPU_EVENT(vcpu, 5, "enabled wait timer:%llx jiffies", sltime);
no_timer:
spin_lock_bh(&vcpu->arch.local_int.float_int->lock);
spin_lock_bh(&vcpu->arch.local_int.lock);
@@ -491,7 +491,7 @@ int kvm_s390_inject_vm(struct kvm *kvm,
switch (s390int->type) {
case KVM_S390_INT_VIRTIO:
- VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%lx",
+ VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx",
s390int->parm, s390int->parm64);
inti->type = s390int->type;
inti->ext.ext_params = s390int->parm;
diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c
index cce40ff..3605df4 100644
--- a/arch/s390/kvm/priv.c
+++ b/arch/s390/kvm/priv.c
@@ -118,7 +118,7 @@ static int handle_store_cpu_address(struct kvm_vcpu *vcpu)
goto out;
}
- VCPU_EVENT(vcpu, 5, "storing cpu address to %lx", useraddr);
+ VCPU_EVENT(vcpu, 5, "storing cpu address to %llx", useraddr);
out:
return 0;
}
diff --git a/drivers/char/hvc_iucv.c b/drivers/char/hvc_iucv.c
index 5ea7d77..a534968 100644
--- a/drivers/char/hvc_iucv.c
+++ b/drivers/char/hvc_iucv.c
@@ -1,26 +1,30 @@
/*
- * hvc_iucv.c - z/VM IUCV back-end for the Hypervisor Console (HVC)
+ * hvc_iucv.c - z/VM IUCV hypervisor console (HVC) device driver
*
- * This back-end for HVC provides terminal access via
+ * This HVC device driver provides terminal access using
* z/VM IUCV communication paths.
*
- * Copyright IBM Corp. 2008.
+ * Copyright IBM Corp. 2008
*
* Author(s): Hendrik Brueckner <brueckner@xxxxxxxxxxxxxxxxxx>
*/
#define KMSG_COMPONENT "hvc_iucv"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/types.h>
#include <asm/ebcdic.h>
+#include <linux/delay.h>
+#include <linux/init.h>
#include <linux/mempool.h>
#include <linux/module.h>
#include <linux/tty.h>
+#include <linux/wait.h>
#include <net/iucv/iucv.h>
#include "hvc_console.h"
-/* HVC backend for z/VM IUCV */
+/* General device driver settings */
#define HVC_IUCV_MAGIC 0xc9e4c3e5
#define MAX_HVC_IUCV_LINES HVC_ALLOC_TTY_ADAPTERS
#define MEMPOOL_MIN_NR (PAGE_SIZE / sizeof(struct iucv_tty_buffer)/4)
@@ -33,14 +37,14 @@
#define MSG_TYPE_WINSIZE 0x08 /* Terminal window size update */
#define MSG_TYPE_DATA 0x10 /* Terminal data */
-#define MSG_SIZE(s) ((s) + offsetof(struct iucv_tty_msg, data))
struct iucv_tty_msg {
u8 version; /* Message version */
u8 type; /* Message type */
-#define MSG_MAX_DATALEN (~(u16)0)
+#define MSG_MAX_DATALEN ((u16)(~0))
u16 datalen; /* Payload length */
u8 data[]; /* Payload buffer */
} __attribute__((packed));
+#define MSG_SIZE(s) ((s) + offsetof(struct iucv_tty_msg, data))
enum iucv_state_t {
IUCV_DISCONN = 0,
@@ -54,19 +58,26 @@ enum tty_state_t {
};
struct hvc_iucv_private {
- struct hvc_struct *hvc; /* HVC console struct reference */
+ struct hvc_struct *hvc; /* HVC struct reference */
u8 srv_name[8]; /* IUCV service name (ebcdic) */
+ unsigned char is_console; /* Linux console usage flag */
enum iucv_state_t iucv_state; /* IUCV connection status */
enum tty_state_t tty_state; /* TTY status */
struct iucv_path *path; /* IUCV path pointer */
spinlock_t lock; /* hvc_iucv_private lock */
+#define SNDBUF_SIZE (PAGE_SIZE) /* must be < MSG_MAX_DATALEN */
+ void *sndbuf; /* send buffer */
+ size_t sndbuf_len; /* length of send buffer */
+#define QUEUE_SNDBUF_DELAY (HZ / 25)
+ struct delayed_work sndbuf_work; /* work: send iucv msg(s) */
+ wait_queue_head_t sndbuf_waitq; /* wait for send completion */
struct list_head tty_outqueue; /* outgoing IUCV messages */
struct list_head tty_inqueue; /* incoming IUCV messages */
};
struct iucv_tty_buffer {
struct list_head list; /* list pointer */
- struct iucv_message msg; /* store an incoming IUCV message */
+ struct iucv_message msg; /* store an IUCV message */
size_t offset; /* data buffer offset */
struct iucv_tty_msg *mbuf; /* buffer to store input/output data */
};
@@ -78,11 +89,12 @@ static void hvc_iucv_msg_pending(struct iucv_path *, struct iucv_message *);
static void hvc_iucv_msg_complete(struct iucv_path *, struct iucv_message *);
-/* Kernel module parameters */
-static unsigned long hvc_iucv_devices;
+/* Kernel module parameter: use one terminal device as default */
+static unsigned long hvc_iucv_devices = 1;
/* Array of allocated hvc iucv tty lines... */
static struct hvc_iucv_private *hvc_iucv_table[MAX_HVC_IUCV_LINES];
+#define IUCV_HVC_CON_IDX (0)
/* Kmem cache and mempool for iucv_tty_buffer elements */
static struct kmem_cache *hvc_iucv_buffer_cache;
@@ -112,7 +124,7 @@ struct hvc_iucv_private *hvc_iucv_get_private(uint32_t num)
}
/**
- * alloc_tty_buffer() - Returns a new struct iucv_tty_buffer element.
+ * alloc_tty_buffer() - Return a new struct iucv_tty_buffer element.
* @size: Size of the internal buffer used to store data.
* @flags: Memory allocation flags passed to mempool.
*
@@ -120,7 +132,6 @@ struct hvc_iucv_private *hvc_iucv_get_private(uint32_t num)
* allocates an internal data buffer with the specified size @size.
* Note: The total message size arises from the internal buffer size and the
* members of the iucv_tty_msg structure.
- *
* The function returns NULL if memory allocation has failed.
*/
static struct iucv_tty_buffer *alloc_tty_buffer(size_t size, gfp_t flags)
@@ -130,7 +141,7 @@ static struct iucv_tty_buffer *alloc_tty_buffer(size_t size, gfp_t flags)
bufp = mempool_alloc(hvc_iucv_mempool, flags);
if (!bufp)
return NULL;
- memset(bufp, 0, sizeof(struct iucv_tty_buffer));
+ memset(bufp, 0, sizeof(*bufp));
if (size > 0) {
bufp->msg.length = MSG_SIZE(size);
@@ -149,9 +160,6 @@ static struct iucv_tty_buffer *alloc_tty_buffer(size_t size, gfp_t flags)
/**
* destroy_tty_buffer() - destroy struct iucv_tty_buffer element.
* @bufp: Pointer to a struct iucv_tty_buffer element, SHALL NOT be NULL.
- *
- * The destroy_tty_buffer() function frees the internal data buffer and returns
- * the struct iucv_tty_buffer element back to the mempool for freeing.
*/
static void destroy_tty_buffer(struct iucv_tty_buffer *bufp)
{
@@ -161,11 +169,7 @@ static void destroy_tty_buffer(struct iucv_tty_buffer *bufp)
/**
* destroy_tty_buffer_list() - call destroy_tty_buffer() for each list element.
- * @list: List head pointer to a list containing struct iucv_tty_buffer
- * elements.
- *
- * Calls destroy_tty_buffer() for each struct iucv_tty_buffer element in the
- * list @list.
+ * @list: List containing struct iucv_tty_buffer elements.
*/
static void destroy_tty_buffer_list(struct list_head *list)
{
@@ -178,24 +182,24 @@ static void destroy_tty_buffer_list(struct list_head *list)
}
/**
- * hvc_iucv_write() - Receive IUCV message write data to HVC console buffer.
- * @priv: Pointer to hvc_iucv_private structure.
- * @buf: HVC console buffer for writing received terminal data.
- * @count: HVC console buffer size.
+ * hvc_iucv_write() - Receive IUCV message & write data to HVC buffer.
+ * @priv: Pointer to struct hvc_iucv_private
+ * @buf: HVC buffer for writing received terminal data.
+ * @count: HVC buffer size.
* @has_more_data: Pointer to an int variable.
*
* The function picks up pending messages from the input queue and receives
* the message data that is then written to the specified buffer @buf.
- * If the buffer size @count is less than the data message size, then the
+ * If the buffer size @count is less than the data message size, the
* message is kept on the input queue and @has_more_data is set to 1.
- * If the message data has been entirely written, the message is removed from
+ * If all message data has been written, the message is removed from
* the input queue.
*
* The function returns the number of bytes written to the terminal, zero if
* there are no pending data messages available or if there is no established
* IUCV path.
* If the IUCV path has been severed, then -EPIPE is returned to cause a
- * hang up (that is issued by the HVC console layer).
+ * hang up (that is issued by the HVC layer).
*/
static int hvc_iucv_write(struct hvc_iucv_private *priv,
char *buf, int count, int *has_more_data)
@@ -204,12 +208,12 @@ static int hvc_iucv_write(struct hvc_iucv_private *priv,
int written;
int rc;
- /* Immediately return if there is no IUCV connection */
+ /* immediately return if there is no IUCV connection */
if (priv->iucv_state == IUCV_DISCONN)
return 0;
- /* If the IUCV path has been severed, return -EPIPE to inform the
- * hvc console layer to hang up the tty device. */
+ /* if the IUCV path has been severed, return -EPIPE to inform the
+ * HVC layer to hang up the tty device. */
if (priv->iucv_state == IUCV_SEVERED)
return -EPIPE;
@@ -217,7 +221,7 @@ static int hvc_iucv_write(struct hvc_iucv_private *priv,
if (list_empty(&priv->tty_inqueue))
return 0;
- /* receive a iucv message and flip data to the tty (ldisc) */
+ /* receive an iucv message and flip data to the tty (ldisc) */
rb = list_first_entry(&priv->tty_inqueue, struct iucv_tty_buffer, list);
written = 0;
@@ -260,7 +264,7 @@ static int hvc_iucv_write(struct hvc_iucv_private *priv,
case MSG_TYPE_WINSIZE:
if (rb->mbuf->datalen != sizeof(struct winsize))
break;
- hvc_resize(priv->hvc, *((struct winsize *)rb->mbuf->data));
+ hvc_resize(priv->hvc, *((struct winsize *) rb->mbuf->data));
break;
case MSG_TYPE_ERROR: /* ignored ... */
@@ -284,10 +288,9 @@ out_written:
* @buf: Pointer to a buffer to store data
* @count: Size of buffer available for writing
*
- * The hvc_console thread calls this method to read characters from
- * the terminal backend. If an IUCV communication path has been established,
- * pending IUCV messages are received and data is copied into buffer @buf
- * up to @count bytes.
+ * The HVC thread calls this method to read characters from the back-end.
+ * If an IUCV communication path has been established, pending IUCV messages
+ * are received and data is copied into buffer @buf up to @count bytes.
*
* Locking: The routine gets called under an irqsave() spinlock; and
* the routine locks the struct hvc_iucv_private->lock to call
@@ -318,66 +321,122 @@ static int hvc_iucv_get_chars(uint32_t vtermno, char *buf, int count)
}
/**
- * hvc_iucv_send() - Send an IUCV message containing terminal data.
+ * hvc_iucv_queue() - Buffer terminal data for sending.
* @priv: Pointer to struct hvc_iucv_private instance.
* @buf: Buffer containing data to send.
- * @size: Size of buffer and amount of data to send.
+ * @count: Size of buffer and amount of data to send.
+ *
+ * The function queues data for sending. To actually send the buffered data,
+ * a work queue function is scheduled (with QUEUE_SNDBUF_DELAY).
+ * The function returns the number of data bytes that has been buffered.
*
- * If an IUCV communication path is established, the function copies the buffer
- * data to a newly allocated struct iucv_tty_buffer element, sends the data and
- * puts the element to the outqueue.
+ * If the device is not connected, data is ignored and the function returns
+ * @count.
+ * If the buffer is full, the function returns 0.
+ * If an existing IUCV communicaton path has been severed, -EPIPE is returned
+ * (that can be passed to HVC layer to cause a tty hangup).
+ */
+static int hvc_iucv_queue(struct hvc_iucv_private *priv, const char *buf,
+ int count)
+{
+ size_t len;
+
+ if (priv->iucv_state == IUCV_DISCONN)
+ return count; /* ignore data */
+
+ if (priv->iucv_state == IUCV_SEVERED)
+ return -EPIPE;
+
+ len = min_t(size_t, count, SNDBUF_SIZE - priv->sndbuf_len);
+ if (!len)
+ return 0;
+
+ memcpy(priv->sndbuf + priv->sndbuf_len, buf, len);
+ priv->sndbuf_len += len;
+
+ if (priv->iucv_state == IUCV_CONNECTED)
+ schedule_delayed_work(&priv->sndbuf_work, QUEUE_SNDBUF_DELAY);
+
+ return len;
+}
+
+/**
+ * hvc_iucv_send() - Send an IUCV message containing terminal data.
+ * @priv: Pointer to struct hvc_iucv_private instance.
*
- * If there is no IUCV communication path established, the function returns 0.
- * If an existing IUCV communicaton path has been severed, the function returns
- * -EPIPE (can be passed to HVC layer to cause a tty hangup).
+ * If an IUCV communication path has been established, the buffered output data
+ * is sent via an IUCV message and the number of bytes sent is returned.
+ * Returns 0 if there is no established IUCV communication path or
+ * -EPIPE if an existing IUCV communicaton path has been severed.
*/
-static int hvc_iucv_send(struct hvc_iucv_private *priv, const char *buf,
- int count)
+static int hvc_iucv_send(struct hvc_iucv_private *priv)
{
struct iucv_tty_buffer *sb;
- int rc;
- u16 len;
+ int rc, len;
if (priv->iucv_state == IUCV_SEVERED)
return -EPIPE;
if (priv->iucv_state == IUCV_DISCONN)
- return 0;
+ return -EIO;
- len = min_t(u16, MSG_MAX_DATALEN, count);
+ if (!priv->sndbuf_len)
+ return 0;
/* allocate internal buffer to store msg data and also compute total
* message length */
- sb = alloc_tty_buffer(len, GFP_ATOMIC);
+ sb = alloc_tty_buffer(priv->sndbuf_len, GFP_ATOMIC);
if (!sb)
return -ENOMEM;
- sb->mbuf->datalen = len;
- memcpy(sb->mbuf->data, buf, len);
+ memcpy(sb->mbuf->data, priv->sndbuf, priv->sndbuf_len);
+ sb->mbuf->datalen = (u16) priv->sndbuf_len;
+ sb->msg.length = MSG_SIZE(sb->mbuf->datalen);
list_add_tail(&sb->list, &priv->tty_outqueue);
rc = __iucv_message_send(priv->path, &sb->msg, 0, 0,
(void *) sb->mbuf, sb->msg.length);
if (rc) {
+ /* drop the message here; however we might want to handle
+ * 0x03 (msg limit reached) by trying again... */
list_del(&sb->list);
destroy_tty_buffer(sb);
- len = 0;
}
+ len = priv->sndbuf_len;
+ priv->sndbuf_len = 0;
return len;
}
/**
+ * hvc_iucv_sndbuf_work() - Send buffered data over IUCV
+ * @work: Work structure.
+ *
+ * This work queue function sends buffered output data over IUCV and,
+ * if not all buffered data could be sent, reschedules itself.
+ */
+static void hvc_iucv_sndbuf_work(struct work_struct *work)
+{
+ struct hvc_iucv_private *priv;
+
+ priv = container_of(work, struct hvc_iucv_private, sndbuf_work.work);
+ if (!priv)
+ return;
+
+ spin_lock_bh(&priv->lock);
+ hvc_iucv_send(priv);
+ spin_unlock_bh(&priv->lock);
+}
+
+/**
* hvc_iucv_put_chars() - HVC put_chars operation.
* @vtermno: HVC virtual terminal number.
* @buf: Pointer to an buffer to read data from
* @count: Size of buffer available for reading
*
- * The hvc_console thread calls this method to write characters from
- * to the terminal backend.
- * The function calls hvc_iucv_send() under the lock of the
- * struct hvc_iucv_private instance that corresponds to the tty @vtermno.
+ * The HVC thread calls this method to write characters to the back-end.
+ * The function calls hvc_iucv_queue() to queue terminal data for sending.
*
* Locking: The method gets called under an irqsave() spinlock; and
* locks struct hvc_iucv_private->lock.
@@ -385,7 +444,7 @@ static int hvc_iucv_send(struct hvc_iucv_private *priv, const char *buf,
static int hvc_iucv_put_chars(uint32_t vtermno, const char *buf, int count)
{
struct hvc_iucv_private *priv = hvc_iucv_get_private(vtermno);
- int sent;
+ int queued;
if (count <= 0)
return 0;
@@ -394,10 +453,10 @@ static int hvc_iucv_put_chars(uint32_t vtermno, const char *buf, int count)
return -ENODEV;
spin_lock(&priv->lock);
- sent = hvc_iucv_send(priv, buf, count);
+ queued = hvc_iucv_queue(priv, buf, count);
spin_unlock(&priv->lock);
- return sent;
+ return queued;
}
/**
@@ -406,7 +465,7 @@ static int hvc_iucv_put_chars(uint32_t vtermno, const char *buf, int count)
* @id: Additional data (originally passed to hvc_alloc): the index of an struct
* hvc_iucv_private instance.
*
- * The function sets the tty state to TTY_OPEN for the struct hvc_iucv_private
+ * The function sets the tty state to TTY_OPENED for the struct hvc_iucv_private
* instance that is derived from @id. Always returns 0.
*
* Locking: struct hvc_iucv_private->lock, spin_lock_bh
@@ -427,12 +486,8 @@ static int hvc_iucv_notifier_add(struct hvc_struct *hp, int id)
}
/**
- * hvc_iucv_cleanup() - Clean up function if the tty portion is finally closed.
+ * hvc_iucv_cleanup() - Clean up and reset a z/VM IUCV HVC instance.
* @priv: Pointer to the struct hvc_iucv_private instance.
- *
- * The functions severs the established IUCV communication path (if any), and
- * destroy struct iucv_tty_buffer elements from the in- and outqueue. Finally,
- * the functions resets the states to TTY_CLOSED and IUCV_DISCONN.
*/
static void hvc_iucv_cleanup(struct hvc_iucv_private *priv)
{
@@ -441,25 +496,62 @@ static void hvc_iucv_cleanup(struct hvc_iucv_private *priv)
priv->tty_state = TTY_CLOSED;
priv->iucv_state = IUCV_DISCONN;
+
+ priv->sndbuf_len = 0;
}
/**
- * hvc_iucv_notifier_hangup() - HVC notifier for tty hangups.
- * @hp: Pointer to the HVC device (struct hvc_struct)
- * @id: Additional data (originally passed to hvc_alloc): the index of an struct
- * hvc_iucv_private instance.
+ * tty_outqueue_empty() - Test if the tty outq is empty
+ * @priv: Pointer to struct hvc_iucv_private instance.
+ */
+static inline int tty_outqueue_empty(struct hvc_iucv_private *priv)
+{
+ int rc;
+
+ spin_lock_bh(&priv->lock);
+ rc = list_empty(&priv->tty_outqueue);
+ spin_unlock_bh(&priv->lock);
+
+ return rc;
+}
+
+/**
+ * flush_sndbuf_sync() - Flush send buffer and wait for completion
+ * @priv: Pointer to struct hvc_iucv_private instance.
*
- * This routine notifies the HVC backend that a tty hangup (carrier loss,
- * virtual or otherwise) has occured.
+ * The routine cancels a pending sndbuf work, calls hvc_iucv_send()
+ * to flush any buffered terminal output data and waits for completion.
+ */
+static void flush_sndbuf_sync(struct hvc_iucv_private *priv)
+{
+ int sync_wait;
+
+ cancel_delayed_work_sync(&priv->sndbuf_work);
+
+ spin_lock_bh(&priv->lock);
+ hvc_iucv_send(priv); /* force sending buffered data */
+ sync_wait = !list_empty(&priv->tty_outqueue); /* anything queued ? */
+ spin_unlock_bh(&priv->lock);
+
+ if (sync_wait)
+ wait_event_timeout(priv->sndbuf_waitq,
+ tty_outqueue_empty(priv), HZ);
+}
+
+/**
+ * hvc_iucv_notifier_hangup() - HVC notifier for TTY hangups.
+ * @hp: Pointer to the HVC device (struct hvc_struct)
+ * @id: Additional data (originally passed to hvc_alloc):
+ * the index of an struct hvc_iucv_private instance.
*
- * The HVC backend for z/VM IUCV ignores virtual hangups (vhangup()), to keep
- * an existing IUCV communication path established.
+ * This routine notifies the HVC back-end that a tty hangup (carrier loss,
+ * virtual or otherwise) has occured.
+ * The z/VM IUCV HVC device driver ignores virtual hangups (vhangup())
+ * to keep an existing IUCV communication path established.
* (Background: vhangup() is called from user space (by getty or login) to
* disable writing to the tty by other applications).
- *
- * If the tty has been opened (e.g. getty) and an established IUCV path has been
- * severed (we caused the tty hangup in that case), then the functions invokes
- * hvc_iucv_cleanup() to clean up.
+ * If the tty has been opened and an established IUCV path has been severed
+ * (we caused the tty hangup), the function calls hvc_iucv_cleanup().
*
* Locking: struct hvc_iucv_private->lock
*/
@@ -471,12 +563,12 @@ static void hvc_iucv_notifier_hangup(struct hvc_struct *hp, int id)
if (!priv)
return;
+ flush_sndbuf_sync(priv);
+
spin_lock_bh(&priv->lock);
/* NOTE: If the hangup was scheduled by ourself (from the iucv
- * path_servered callback [IUCV_SEVERED]), then we have to
- * finally clean up the tty backend structure and set state to
- * TTY_CLOSED.
- *
+ * path_servered callback [IUCV_SEVERED]), we have to clean up
+ * our structure and to set state to TTY_CLOSED.
* If the tty was hung up otherwise (e.g. vhangup()), then we
* ignore this hangup and keep an established IUCV path open...
* (...the reason is that we are not able to connect back to the
@@ -494,10 +586,9 @@ static void hvc_iucv_notifier_hangup(struct hvc_struct *hp, int id)
* @id: Additional data (originally passed to hvc_alloc):
* the index of an struct hvc_iucv_private instance.
*
- * This routine notifies the HVC backend that the last tty device file
- * descriptor has been closed.
- * The function calls hvc_iucv_cleanup() to clean up the struct hvc_iucv_private
- * instance.
+ * This routine notifies the HVC back-end that the last tty device fd has been
+ * closed. The function calls hvc_iucv_cleanup() to clean up the struct
+ * hvc_iucv_private instance.
*
* Locking: struct hvc_iucv_private->lock
*/
@@ -510,6 +601,8 @@ static void hvc_iucv_notifier_del(struct hvc_struct *hp, int id)
if (!priv)
return;
+ flush_sndbuf_sync(priv);
+
spin_lock_bh(&priv->lock);
path = priv->path; /* save reference to IUCV path */
priv->path = NULL;
@@ -527,20 +620,18 @@ static void hvc_iucv_notifier_del(struct hvc_struct *hp, int id)
/**
* hvc_iucv_path_pending() - IUCV handler to process a connection request.
* @path: Pending path (struct iucv_path)
- * @ipvmid: Originator z/VM system identifier
+ * @ipvmid: z/VM system identifier of originator
* @ipuser: User specified data for this path
* (AF_IUCV: port/service name and originator port)
*
- * The function uses the @ipuser data to check to determine if the pending
- * path belongs to a terminal managed by this HVC backend.
- * If the check is successful, then an additional check is done to ensure
- * that a terminal cannot be accessed multiple times (only one connection
- * to a terminal is allowed). In that particular case, the pending path is
- * severed. If it is the first connection, the pending path is accepted and
- * associated to the struct hvc_iucv_private. The iucv state is updated to
- * reflect that a communication path has been established.
+ * The function uses the @ipuser data to determine if the pending path belongs
+ * to a terminal managed by this device driver.
+ * If the path belongs to this driver, ensure that the terminal is not accessed
+ * multiple times (only one connection to a terminal is allowed).
+ * If the terminal is not yet connected, the pending path is accepted and is
+ * associated to the appropriate struct hvc_iucv_private instance.
*
- * Returns 0 if the path belongs to a terminal managed by the this HVC backend;
+ * Returns 0 if @path belongs to a terminal managed by the this device driver;
* otherwise returns -ENODEV in order to dispatch this path to other handlers.
*
* Locking: struct hvc_iucv_private->lock
@@ -559,7 +650,6 @@ static int hvc_iucv_path_pending(struct iucv_path *path,
priv = hvc_iucv_table[i];
break;
}
-
if (!priv)
return -ENODEV;
@@ -588,6 +678,9 @@ static int hvc_iucv_path_pending(struct iucv_path *path,
priv->path = path;
priv->iucv_state = IUCV_CONNECTED;
+ /* flush buffered output data... */
+ schedule_delayed_work(&priv->sndbuf_work, 5);
+
out_path_handled:
spin_unlock(&priv->lock);
return 0;
@@ -603,8 +696,7 @@ out_path_handled:
* sets the iucv state to IUCV_SEVERED for the associated struct
* hvc_iucv_private instance. Later, the IUCV_SEVERED state triggers a tty
* hangup (hvc_iucv_get_chars() / hvc_iucv_write()).
- *
- * If tty portion of the HVC is closed then clean up the outqueue in addition.
+ * If tty portion of the HVC is closed, clean up the outqueue.
*
* Locking: struct hvc_iucv_private->lock
*/
@@ -615,15 +707,25 @@ static void hvc_iucv_path_severed(struct iucv_path *path, u8 ipuser[16])
spin_lock(&priv->lock);
priv->iucv_state = IUCV_SEVERED;
- /* NOTE: If the tty has not yet been opened by a getty program
- * (e.g. to see console messages), then cleanup the
- * hvc_iucv_private structure to allow re-connects.
+ /* If the tty has not yet been opened, clean up the hvc_iucv_private
+ * structure to allow re-connects.
+ * This is also done for our console device because console hangups
+ * are handled specially and no notifier is called by HVC.
+ * The tty session is active (TTY_OPEN) and ready for re-connects...
*
- * If the tty has been opened, the get_chars() callback returns
- * -EPIPE to signal the hvc console layer to hang up the tty. */
+ * If it has been opened, let get_chars() return -EPIPE to signal the
+ * HVC layer to hang up the tty.
+ * If so, we need to wake up the HVC thread to call get_chars()...
+ */
priv->path = NULL;
if (priv->tty_state == TTY_CLOSED)
hvc_iucv_cleanup(priv);
+ else
+ if (priv->is_console) {
+ hvc_iucv_cleanup(priv);
+ priv->tty_state = TTY_OPENED;
+ } else
+ hvc_kick();
spin_unlock(&priv->lock);
/* finally sever path (outside of priv->lock due to lock ordering) */
@@ -636,9 +738,9 @@ static void hvc_iucv_path_severed(struct iucv_path *path, u8 ipuser[16])
* @path: Pending path (struct iucv_path)
* @msg: Pointer to the IUCV message
*
- * The function stores an incoming message on the input queue for later
+ * The function puts an incoming message on the input queue for later
* processing (by hvc_iucv_get_chars() / hvc_iucv_write()).
- * However, if the tty has not yet been opened, the message is rejected.
+ * If the tty has not yet been opened, the message is rejected.
*
* Locking: struct hvc_iucv_private->lock
*/
@@ -648,6 +750,12 @@ static void hvc_iucv_msg_pending(struct iucv_path *path,
struct hvc_iucv_private *priv = path->private;
struct iucv_tty_buffer *rb;
+ /* reject messages that exceed max size of iucv_tty_msg->datalen */
+ if (msg->length > MSG_SIZE(MSG_MAX_DATALEN)) {
+ iucv_message_reject(path, msg);
+ return;
+ }
+
spin_lock(&priv->lock);
/* reject messages if tty has not yet been opened */
@@ -656,7 +764,7 @@ static void hvc_iucv_msg_pending(struct iucv_path *path,
goto unlock_return;
}
- /* allocate buffer an empty buffer element */
+ /* allocate tty buffer to save iucv msg only */
rb = alloc_tty_buffer(0, GFP_ATOMIC);
if (!rb) {
iucv_message_reject(path, msg);
@@ -666,7 +774,7 @@ static void hvc_iucv_msg_pending(struct iucv_path *path,
list_add_tail(&rb->list, &priv->tty_inqueue);
- hvc_kick(); /* wakup hvc console thread */
+ hvc_kick(); /* wake up hvc thread */
unlock_return:
spin_unlock(&priv->lock);
@@ -677,10 +785,10 @@ unlock_return:
* @path: Pending path (struct iucv_path)
* @msg: Pointer to the IUCV message
*
- * The function is called upon completion of message delivery and the
- * message is removed from the outqueue. Additional delivery information
- * can be found in msg->audit: rejected messages (0x040000 (IPADRJCT)) and
- * purged messages (0x010000 (IPADPGNR)).
+ * The function is called upon completion of message delivery to remove the
+ * message from the outqueue. Additional delivery information can be found
+ * msg->audit: rejected messages (0x040000 (IPADRJCT)), and
+ * purged messages (0x010000 (IPADPGNR)).
*
* Locking: struct hvc_iucv_private->lock
*/
@@ -697,6 +805,7 @@ static void hvc_iucv_msg_complete(struct iucv_path *path,
list_move(&ent->list, &list_remove);
break;
}
+ wake_up(&priv->sndbuf_waitq);
spin_unlock(&priv->lock);
destroy_tty_buffer_list(&list_remove);
}
@@ -713,13 +822,14 @@ static struct hv_ops hvc_iucv_ops = {
/**
* hvc_iucv_alloc() - Allocates a new struct hvc_iucv_private instance
- * @id: hvc_iucv_table index
+ * @id: hvc_iucv_table index
+ * @is_console: Flag if the instance is used as Linux console
*
- * This function allocates a new hvc_iucv_private struct and put the
- * instance into hvc_iucv_table at index @id.
+ * This function allocates a new hvc_iucv_private structure and stores
+ * the instance in hvc_iucv_table at index @id.
* Returns 0 on success; otherwise non-zero.
*/
-static int __init hvc_iucv_alloc(int id)
+static int __init hvc_iucv_alloc(int id, unsigned int is_console)
{
struct hvc_iucv_private *priv;
char name[9];
@@ -732,18 +842,33 @@ static int __init hvc_iucv_alloc(int id)
spin_lock_init(&priv->lock);
INIT_LIST_HEAD(&priv->tty_outqueue);
INIT_LIST_HEAD(&priv->tty_inqueue);
+ INIT_DELAYED_WORK(&priv->sndbuf_work, hvc_iucv_sndbuf_work);
+ init_waitqueue_head(&priv->sndbuf_waitq);
+
+ priv->sndbuf = (void *) get_zeroed_page(GFP_KERNEL);
+ if (!priv->sndbuf) {
+ kfree(priv);
+ return -ENOMEM;
+ }
+
+ /* set console flag */
+ priv->is_console = is_console;
- /* Finally allocate hvc */
- priv->hvc = hvc_alloc(HVC_IUCV_MAGIC + id,
- HVC_IUCV_MAGIC + id, &hvc_iucv_ops, PAGE_SIZE);
+ /* finally allocate hvc */
+ priv->hvc = hvc_alloc(HVC_IUCV_MAGIC + id, /* PAGE_SIZE */
+ HVC_IUCV_MAGIC + id, &hvc_iucv_ops, 256);
if (IS_ERR(priv->hvc)) {
rc = PTR_ERR(priv->hvc);
+ free_page((unsigned long) priv->sndbuf);
kfree(priv);
return rc;
}
+ /* notify HVC thread instead of using polling */
+ priv->hvc->irq_requested = 1;
+
/* setup iucv related information */
- snprintf(name, 9, "ihvc%-4d", id);
+ snprintf(name, 9, "lnxhvc%-2d", id);
memcpy(priv->srv_name, name, 8);
ASCEBC(priv->srv_name, 8);
@@ -752,15 +877,16 @@ static int __init hvc_iucv_alloc(int id)
}
/**
- * hvc_iucv_init() - Initialization of HVC backend for z/VM IUCV
+ * hvc_iucv_init() - z/VM IUCV HVC device driver initialization
*/
static int __init hvc_iucv_init(void)
{
- int rc, i;
+ int rc;
+ unsigned int i;
if (!MACHINE_IS_VM) {
- pr_warning("The z/VM IUCV Hypervisor console cannot be "
- "used without z/VM.\n");
+ pr_info("The z/VM IUCV HVC device driver cannot "
+ "be used without z/VM\n");
return -ENODEV;
}
@@ -774,26 +900,33 @@ static int __init hvc_iucv_init(void)
sizeof(struct iucv_tty_buffer),
0, 0, NULL);
if (!hvc_iucv_buffer_cache) {
- pr_err("Not enough memory for driver initialization "
- "(rs=%d).\n", 1);
+ pr_err("Allocating memory failed with reason code=%d\n", 1);
return -ENOMEM;
}
hvc_iucv_mempool = mempool_create_slab_pool(MEMPOOL_MIN_NR,
hvc_iucv_buffer_cache);
if (!hvc_iucv_mempool) {
- pr_err("Not enough memory for driver initialization "
- "(rs=%d).\n", 2);
+ pr_err("Allocating memory failed with reason code=%d\n", 2);
kmem_cache_destroy(hvc_iucv_buffer_cache);
return -ENOMEM;
}
+ /* register the first terminal device as console
+ * (must be done before allocating hvc terminal devices) */
+ rc = hvc_instantiate(HVC_IUCV_MAGIC, IUCV_HVC_CON_IDX, &hvc_iucv_ops);
+ if (rc) {
+ pr_err("Registering HVC terminal device as "
+ "Linux console failed\n");
+ goto out_error_memory;
+ }
+
/* allocate hvc_iucv_private structs */
for (i = 0; i < hvc_iucv_devices; i++) {
- rc = hvc_iucv_alloc(i);
+ rc = hvc_iucv_alloc(i, (i == IUCV_HVC_CON_IDX) ? 1 : 0);
if (rc) {
- pr_err("Could not create new z/VM IUCV HVC backend "
- "rc=%d.\n", rc);
+ pr_err("Creating a new HVC terminal device "
+ "failed with error code=%d\n", rc);
goto out_error_hvc;
}
}
@@ -801,7 +934,8 @@ static int __init hvc_iucv_init(void)
/* register IUCV callback handler */
rc = iucv_register(&hvc_iucv_handler, 0);
if (rc) {
- pr_err("Could not register iucv handler (rc=%d).\n", rc);
+ pr_err("Registering IUCV handlers failed with error code=%d\n",
+ rc);
goto out_error_iucv;
}
@@ -816,22 +950,13 @@ out_error_hvc:
hvc_remove(hvc_iucv_table[i]->hvc);
kfree(hvc_iucv_table[i]);
}
+out_error_memory:
mempool_destroy(hvc_iucv_mempool);
kmem_cache_destroy(hvc_iucv_buffer_cache);
return rc;
}
/**
- * hvc_iucv_console_init() - Early console initialization
- */
-static int __init hvc_iucv_console_init(void)
-{
- if (!MACHINE_IS_VM || !hvc_iucv_devices)
- return -ENODEV;
- return hvc_instantiate(HVC_IUCV_MAGIC, 0, &hvc_iucv_ops);
-}
-
-/**
* hvc_iucv_config() - Parsing of hvc_iucv= kernel command line parameter
* @val: Parameter value (numeric)
*/
@@ -841,10 +966,5 @@ static int __init hvc_iucv_config(char *val)
}
-module_init(hvc_iucv_init);
-console_initcall(hvc_iucv_console_init);
+device_initcall(hvc_iucv_init);
__setup("hvc_iucv=", hvc_iucv_config);
-
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("HVC back-end for z/VM IUCV.");
-MODULE_AUTHOR("Hendrik Brueckner <brueckner@xxxxxxxxxxxxxxxxxx>");
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index 570ae59..bd59149 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -336,6 +336,9 @@ static int
dasd_state_ready_to_online(struct dasd_device * device)
{
int rc;
+ struct gendisk *disk;
+ struct disk_part_iter piter;
+ struct hd_struct *part;
if (device->discipline->ready_to_online) {
rc = device->discipline->ready_to_online(device);
@@ -343,8 +346,14 @@ dasd_state_ready_to_online(struct dasd_device * device)
return rc;
}
device->state = DASD_STATE_ONLINE;
- if (device->block)
+ if (device->block) {
dasd_schedule_block_bh(device->block);
+ disk = device->block->bdev->bd_disk;
+ disk_part_iter_init(&piter, disk, DISK_PITER_INCL_PART0);
+ while ((part = disk_part_iter_next(&piter)))
+ kobject_uevent(&part_to_dev(part)->kobj, KOBJ_CHANGE);
+ disk_part_iter_exit(&piter);
+ }
return 0;
}
@@ -354,6 +363,9 @@ dasd_state_ready_to_online(struct dasd_device * device)
static int dasd_state_online_to_ready(struct dasd_device *device)
{
int rc;
+ struct gendisk *disk;
+ struct disk_part_iter piter;
+ struct hd_struct *part;
if (device->discipline->online_to_ready) {
rc = device->discipline->online_to_ready(device);
@@ -361,6 +373,13 @@ static int dasd_state_online_to_ready(struct dasd_device *device)
return rc;
}
device->state = DASD_STATE_READY;
+ if (device->block) {
+ disk = device->block->bdev->bd_disk;
+ disk_part_iter_init(&piter, disk, DISK_PITER_INCL_PART0);
+ while ((part = disk_part_iter_next(&piter)))
+ kobject_uevent(&part_to_dev(part)->kobj, KOBJ_CHANGE);
+ disk_part_iter_exit(&piter);
+ }
return 0;
}
diff --git a/drivers/s390/block/dasd_devmap.c b/drivers/s390/block/dasd_devmap.c
index 2ef2573..300e28a 100644
--- a/drivers/s390/block/dasd_devmap.c
+++ b/drivers/s390/block/dasd_devmap.c
@@ -206,6 +206,8 @@ dasd_feature_list(char *str, char **endp)
features |= DASD_FEATURE_USEDIAG;
else if (len == 6 && !strncmp(str, "erplog", 6))
features |= DASD_FEATURE_ERPLOG;
+ else if (len == 8 && !strncmp(str, "failfast", 8))
+ features |= DASD_FEATURE_FAILFAST;
else {
MESSAGE(KERN_WARNING,
"unsupported feature: %*s, "
@@ -667,6 +669,51 @@ dasd_device_from_cdev(struct ccw_device *cdev)
*/
/*
+ * failfast controls the behaviour, if no path is available
+ */
+static ssize_t dasd_ff_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct dasd_devmap *devmap;
+ int ff_flag;
+
+ devmap = dasd_find_busid(dev->bus_id);
+ if (!IS_ERR(devmap))
+ ff_flag = (devmap->features & DASD_FEATURE_FAILFAST) != 0;
+ else
+ ff_flag = (DASD_FEATURE_DEFAULT & DASD_FEATURE_FAILFAST) != 0;
+ return snprintf(buf, PAGE_SIZE, ff_flag ? "1\n" : "0\n");
+}
+
+static ssize_t dasd_ff_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct dasd_devmap *devmap;
+ int val;
+ char *endp;
+
+ devmap = dasd_devmap_from_cdev(to_ccwdev(dev));
+ if (IS_ERR(devmap))
+ return PTR_ERR(devmap);
+
+ val = simple_strtoul(buf, &endp, 0);
+ if (((endp + 1) < (buf + count)) || (val > 1))
+ return -EINVAL;
+
+ spin_lock(&dasd_devmap_lock);
+ if (val)
+ devmap->features |= DASD_FEATURE_FAILFAST;
+ else
+ devmap->features &= ~DASD_FEATURE_FAILFAST;
+ if (devmap->device)
+ devmap->device->features = devmap->features;
+ spin_unlock(&dasd_devmap_lock);
+ return count;
+}
+
+static DEVICE_ATTR(failfast, 0644, dasd_ff_show, dasd_ff_store);
+
+/*
* readonly controls the readonly status of a dasd
*/
static ssize_t
@@ -1020,6 +1067,7 @@ static struct attribute * dasd_attrs[] = {
&dev_attr_use_diag.attr,
&dev_attr_eer_enabled.attr,
&dev_attr_erplog.attr,
+ &dev_attr_failfast.attr,
NULL,
};
diff --git a/drivers/s390/block/dasd_diag.c b/drivers/s390/block/dasd_diag.c
index 7844461..ef2a569 100644
--- a/drivers/s390/block/dasd_diag.c
+++ b/drivers/s390/block/dasd_diag.c
@@ -544,7 +544,8 @@ static struct dasd_ccw_req *dasd_diag_build_cp(struct dasd_device *memdev,
}
cqr->retries = DIAG_MAX_RETRIES;
cqr->buildclk = get_clock();
- if (blk_noretry_request(req))
+ if (blk_noretry_request(req) ||
+ block->base->features & DASD_FEATURE_FAILFAST)
set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
cqr->startdev = memdev;
cqr->memdev = memdev;
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index bd2c52e..bdb8799 100644
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -1700,7 +1700,8 @@ static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
recid++;
}
}
- if (blk_noretry_request(req))
+ if (blk_noretry_request(req) ||
+ block->base->features & DASD_FEATURE_FAILFAST)
set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
cqr->startdev = startdev;
cqr->memdev = startdev;
diff --git a/drivers/s390/block/dasd_fba.c b/drivers/s390/block/dasd_fba.c
index 7d442ae..f1d1760 100644
--- a/drivers/s390/block/dasd_fba.c
+++ b/drivers/s390/block/dasd_fba.c
@@ -355,7 +355,8 @@ static struct dasd_ccw_req *dasd_fba_build_cp(struct dasd_device * memdev,
recid++;
}
}
- if (blk_noretry_request(req))
+ if (blk_noretry_request(req) ||
+ block->base->features & DASD_FEATURE_FAILFAST)
set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
cqr->startdev = memdev;
cqr->memdev = memdev;
diff --git a/drivers/s390/char/Kconfig b/drivers/s390/char/Kconfig
index 6430338..0769ced 100644
--- a/drivers/s390/char/Kconfig
+++ b/drivers/s390/char/Kconfig
@@ -100,7 +100,7 @@ comment "S/390 tape interface support"
config S390_TAPE_BLOCK
bool "Support for tape block devices"
- depends on S390_TAPE
+ depends on S390_TAPE && BLOCK
help
Select this option if you want to access your channel-attached tape
devices using the block device interface. This interface is similar
diff --git a/drivers/s390/cio/qdio_debug.c b/drivers/s390/cio/qdio_debug.c
index f8a3b69..da7afb0 100644
--- a/drivers/s390/cio/qdio_debug.c
+++ b/drivers/s390/cio/qdio_debug.c
@@ -169,6 +169,8 @@ static void setup_debugfs_entry(struct qdio_q *q, struct ccw_device *cdev)
q->nr);
debugfs_queues[i] = debugfs_create_file(name, S_IFREG | S_IRUGO | S_IWUSR,
debugfs_root, q, &debugfs_fops);
+ if (IS_ERR(debugfs_queues[i]))
+ debugfs_queues[i] = NULL;
}
void qdio_setup_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev)
--
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