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Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6

Browse Source 
* 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6:
  [S390] qdio: FCP/SCSI write I/O stagnates on LPAR
  [S390] Fix futex_atomic_cmpxchg_std inline assembly.
  [S390] dcss: Fix Unlikely(x) != y
  [S390] sclp: clean up send/receive naming scheme
  [S390] etr: fix compile error on !SMP
  [S390] qdio: fix qdio_activate timeout handling.
  [S390] Initialize per cpu lowcores on cpu hotplug.
  [S390] find bit corner case.
  [S390] dasd: fix locking in __dasd_device_process_final_queue
  [S390] Make sure enabled wait psw is loaded in default_idle.
  [S390] Let NR_CPUS default to 32/64 on s390/s390x.
  [S390] cio: Do timed recovery on workqueue.
  [S390] cio: Remember to initialize recovery_lock.
This commit is contained in:
Linus Torvalds 2008-02-19 08:04:23 -08:00
commit aa3f98037c
17 changed files with 103 additions and 70 deletions
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3
arch/s390/Kconfig
View File

@ -100,7 +100,8 @@ config NR_CPUS
int "Maximum number of CPUs (2-64)"
range 2 64
depends on SMP
default "32"
default "32" if !64BIT
default "64" if 64BIT
help
This allows you to specify the maximum number of CPUs which this
kernel will support. The maximum supported value is 64 and the

15
arch/s390/kernel/process.c
View File

@ -114,24 +114,27 @@ extern void s390_handle_mcck(void);
static void default_idle(void)
{
int cpu, rc;
int nr_calls = 0;
void *hcpu;
#ifdef CONFIG_SMP
struct s390_idle_data *idle;
#endif
/* CPU is going idle. */
cpu = smp_processor_id();
hcpu = (void *)(long)cpu;
local_irq_disable();
if (need_resched()) {
local_irq_enable();
return;
}
rc = atomic_notifier_call_chain(&idle_chain,
S390_CPU_IDLE, (void *)(long) cpu);
if (rc != NOTIFY_OK && rc != NOTIFY_DONE)
BUG();
if (rc != NOTIFY_OK) {
rc = __atomic_notifier_call_chain(&idle_chain, S390_CPU_IDLE, hcpu, -1,
&nr_calls);
if (rc == NOTIFY_BAD) {
nr_calls--;
__atomic_notifier_call_chain(&idle_chain, S390_CPU_NOT_IDLE,
hcpu, nr_calls, NULL);
local_irq_enable();
return;
}

53
arch/s390/kernel/smp.c
View File

@ -626,13 +626,17 @@ static int __cpuinit smp_alloc_lowcore(int cpu)
if (!lowcore)
return -ENOMEM;
async_stack = __get_free_pages(GFP_KERNEL, ASYNC_ORDER);
if (!async_stack)
goto out_async_stack;
panic_stack = __get_free_page(GFP_KERNEL);
if (!panic_stack)
goto out_panic_stack;
*lowcore = S390_lowcore;
if (!panic_stack || !async_stack)
goto out;
/*
* Only need to copy the first 512 bytes from address 0. But since
* the compiler emits a warning if src == NULL for memcpy use copy_page
* instead. Copies more than needed but this code is not performance
* critical.
*/
copy_page(lowcore, &S390_lowcore);
memset((void *)lowcore + 512, 0, sizeof(*lowcore) - 512);
lowcore->async_stack = async_stack + ASYNC_SIZE;
lowcore->panic_stack = panic_stack + PAGE_SIZE;
@ -653,9 +657,8 @@ static int __cpuinit smp_alloc_lowcore(int cpu)
out_save_area:
free_page(panic_stack);
#endif
out_panic_stack:
out:
free_pages(async_stack, ASYNC_ORDER);
out_async_stack:
free_pages((unsigned long) lowcore, lc_order);
return -ENOMEM;
}
@ -719,8 +722,8 @@ int __cpuinit __cpu_up(unsigned int cpu)
cpu_lowcore->percpu_offset = __per_cpu_offset[cpu];
cpu_lowcore->current_task = (unsigned long) idle;
cpu_lowcore->cpu_data.cpu_nr = cpu;
cpu_lowcore->softirq_pending = 0;
cpu_lowcore->ext_call_fast = 0;
cpu_lowcore->kernel_asce = S390_lowcore.kernel_asce;
cpu_lowcore->ipl_device = S390_lowcore.ipl_device;
eieio();
while (signal_processor(cpu, sigp_restart) == sigp_busy)
@ -797,23 +800,43 @@ void cpu_die(void)
void __init smp_prepare_cpus(unsigned int max_cpus)
{
#ifndef CONFIG_64BIT
unsigned long save_area = 0;
#endif
unsigned long async_stack, panic_stack;
struct _lowcore *lowcore;
unsigned int cpu;
int lc_order;
smp_detect_cpus();
/* request the 0x1201 emergency signal external interrupt */
if (register_external_interrupt(0x1201, do_ext_call_interrupt) != 0)
panic("Couldn't request external interrupt 0x1201");
memset(lowcore_ptr, 0, sizeof(lowcore_ptr));
print_cpu_info(&S390_lowcore.cpu_data);
smp_alloc_lowcore(smp_processor_id());
/* Reallocate current lowcore, but keep its contents. */
lc_order = sizeof(long) == 8 ? 1 : 0;
lowcore = (void *) __get_free_pages(GFP_KERNEL | GFP_DMA, lc_order);
panic_stack = __get_free_page(GFP_KERNEL);
async_stack = __get_free_pages(GFP_KERNEL, ASYNC_ORDER);
#ifndef CONFIG_64BIT
if (MACHINE_HAS_IEEE)
ctl_set_bit(14, 29); /* enable extended save area */
save_area = get_zeroed_page(GFP_KERNEL);
#endif
set_prefix((u32)(unsigned long) lowcore_ptr[smp_processor_id()]);
local_irq_disable();
local_mcck_disable();
lowcore_ptr[smp_processor_id()] = lowcore;
*lowcore = S390_lowcore;
lowcore->panic_stack = panic_stack + PAGE_SIZE;
lowcore->async_stack = async_stack + ASYNC_SIZE;
#ifndef CONFIG_64BIT
if (MACHINE_HAS_IEEE)
lowcore->extended_save_area_addr = (u32) save_area;
#endif
set_prefix((u32)(unsigned long) lowcore);
local_mcck_enable();
local_irq_enable();
for_each_possible_cpu(cpu)
if (cpu != smp_processor_id())
smp_create_idle(cpu);

2
arch/s390/kernel/time.c
View File

@ -744,7 +744,6 @@ static void etr_adjust_time(unsigned long long clock, unsigned long long delay)
}
}
#ifdef CONFIG_SMP
static void etr_sync_cpu_start(void *dummy)
{
int *in_sync = dummy;
@ -777,7 +776,6 @@ static void etr_sync_cpu_start(void *dummy)
static void etr_sync_cpu_end(void *dummy)
{
}
#endif /* CONFIG_SMP */
/*
* Sync the TOD clock using the port refered to by aibp. This port

8
arch/s390/lib/uaccess_std.c
View File

@ -293,10 +293,10 @@ int futex_atomic_cmpxchg_std(int __user *uaddr, int oldval, int newval)
asm volatile(
" sacf 256\n"
" cs %1,%4,0(%5)\n"
"0: lr %0,%1\n"
"1: sacf 0\n"
EX_TABLE(0b,1b)
"0: cs %1,%4,0(%5)\n"
"1: lr %0,%1\n"
"2: sacf 0\n"
EX_TABLE(0b,2b) EX_TABLE(1b,2b)
: "=d" (ret), "+d" (oldval), "=m" (*uaddr)
: "0" (-EFAULT), "d" (newval), "a" (uaddr), "m" (*uaddr)
: "cc", "memory" );

12
drivers/s390/block/dasd.c
View File

@ -1149,12 +1149,14 @@ static void __dasd_device_process_final_queue(struct dasd_device *device,
{
struct list_head *l, *n;
struct dasd_ccw_req *cqr;
struct dasd_block *block;
list_for_each_safe(l, n, final_queue) {
cqr = list_entry(l, struct dasd_ccw_req, devlist);
list_del_init(&cqr->devlist);
if (cqr->block)
spin_lock_bh(&cqr->block->queue_lock);
block = cqr->block;
if (block)
spin_lock_bh(&block->queue_lock);
switch (cqr->status) {
case DASD_CQR_SUCCESS:
cqr->status = DASD_CQR_DONE;
@ -1172,15 +1174,13 @@ static void __dasd_device_process_final_queue(struct dasd_device *device,
cqr, cqr->status);
BUG();
}
if (cqr->block)
spin_unlock_bh(&cqr->block->queue_lock);
if (cqr->callback != NULL)
(cqr->callback)(cqr, cqr->callback_data);
if (block)
spin_unlock_bh(&block->queue_lock);
}
}
/*
* Take a look at the first request on the ccw queue and check
* if it reached its expire time. If so, terminate the IO.

2
drivers/s390/block/dcssblk.c
View File

@ -666,7 +666,7 @@ dcssblk_make_request(struct request_queue *q, struct bio *bio)
page_addr = (unsigned long)
page_address(bvec->bv_page) + bvec->bv_offset;
source_addr = dev_info->start + (index<<12) + bytes_done;
if (unlikely(page_addr & 4095) != 0 || (bvec->bv_len & 4095) != 0)
if (unlikely((page_addr & 4095) != 0) || (bvec->bv_len & 4095) != 0)
// More paranoia.
goto fail;
if (bio_data_dir(bio) == READ) {

12
drivers/s390/char/sclp.c
View File

@ -29,10 +29,10 @@ static ext_int_info_t ext_int_info_hwc;
/* Lock to protect internal data consistency. */
static DEFINE_SPINLOCK(sclp_lock);
/* Mask of events that we can receive from the sclp interface. */
/* Mask of events that we can send to the sclp interface. */
static sccb_mask_t sclp_receive_mask;
/* Mask of events that we can send to the sclp interface. */
/* Mask of events that we can receive from the sclp interface. */
static sccb_mask_t sclp_send_mask;
/* List of registered event listeners and senders. */
@ -380,7 +380,7 @@ sclp_interrupt_handler(__u16 code)
}
sclp_running_state = sclp_running_state_idle;
}
if (evbuf_pending && sclp_receive_mask != 0 &&
if (evbuf_pending &&
sclp_activation_state == sclp_activation_state_active)
__sclp_queue_read_req();
spin_unlock(&sclp_lock);
@ -459,8 +459,8 @@ sclp_dispatch_state_change(void)
reg = NULL;
list_for_each(l, &sclp_reg_list) {
reg = list_entry(l, struct sclp_register, list);
receive_mask = reg->receive_mask & sclp_receive_mask;
send_mask = reg->send_mask & sclp_send_mask;
receive_mask = reg->send_mask & sclp_receive_mask;
send_mask = reg->receive_mask & sclp_send_mask;
if (reg->sclp_receive_mask != receive_mask ||
reg->sclp_send_mask != send_mask) {
reg->sclp_receive_mask = receive_mask;
@ -615,8 +615,8 @@ struct init_sccb {
u16 mask_length;
sccb_mask_t receive_mask;
sccb_mask_t send_mask;
sccb_mask_t sclp_send_mask;
sccb_mask_t sclp_receive_mask;
sccb_mask_t sclp_send_mask;
} __attribute__((packed));
/* Prepare init mask request. Called while sclp_lock is locked. */

6
drivers/s390/char/sclp.h
View File

@ -122,11 +122,13 @@ struct sclp_req {
/* of some routines it wants to be called from the low level driver */
struct sclp_register {
struct list_head list;
/* event masks this user is registered for */
/* User wants to receive: */
sccb_mask_t receive_mask;
/* User wants to send: */
sccb_mask_t send_mask;
/* actually present events */
/* H/W can receive: */
sccb_mask_t sclp_receive_mask;
/* H/W can send: */
sccb_mask_t sclp_send_mask;
/* called if event type availability changes */
void (*state_change_fn)(struct sclp_register *);

2
drivers/s390/char/sclp_config.c
View File

@ -64,7 +64,7 @@ static int __init sclp_conf_init(void)
return rc;
}
if (!(sclp_conf_register.sclp_receive_mask & EVTYP_CONFMGMDATA_MASK)) {
if (!(sclp_conf_register.sclp_send_mask & EVTYP_CONFMGMDATA_MASK)) {
printk(KERN_WARNING TAG "no configuration management.\n");
sclp_unregister(&sclp_conf_register);
rc = -ENOSYS;

2
drivers/s390/char/sclp_cpi_sys.c
View File

@ -129,7 +129,7 @@ static int cpi_req(void)
"to hardware console.\n");
goto out;
}
if (!(sclp_cpi_event.sclp_send_mask & EVTYP_CTLPROGIDENT_MASK)) {
if (!(sclp_cpi_event.sclp_receive_mask & EVTYP_CTLPROGIDENT_MASK)) {
printk(KERN_WARNING "cpi: no control program "
"identification support\n");
rc = -EOPNOTSUPP;

4
drivers/s390/char/sclp_rw.c
View File

@ -452,10 +452,10 @@ sclp_emit_buffer(struct sclp_buffer *buffer,
return -EIO;
sccb = buffer->sccb;
if (sclp_rw_event.sclp_send_mask & EVTYP_MSG_MASK)
if (sclp_rw_event.sclp_receive_mask & EVTYP_MSG_MASK)
/* Use normal write message */
sccb->msg_buf.header.type = EVTYP_MSG;
else if (sclp_rw_event.sclp_send_mask & EVTYP_PMSGCMD_MASK)
else if (sclp_rw_event.sclp_receive_mask & EVTYP_PMSGCMD_MASK)
/* Use write priority message */
sccb->msg_buf.header.type = EVTYP_PMSGCMD;
else

2
drivers/s390/char/sclp_vt220.c
View File

@ -202,7 +202,7 @@ sclp_vt220_callback(struct sclp_req *request, void *data)
static int
__sclp_vt220_emit(struct sclp_vt220_request *request)
{
if (!(sclp_vt220_register.sclp_send_mask & EVTYP_VT220MSG_MASK)) {
if (!(sclp_vt220_register.sclp_receive_mask & EVTYP_VT220MSG_MASK)) {
request->sclp_req.status = SCLP_REQ_FAILED;
return -EIO;
}

15
drivers/s390/cio/device.c
View File

@ -32,7 +32,7 @@
#include "io_sch.h"
static struct timer_list recovery_timer;
static spinlock_t recovery_lock;
static DEFINE_SPINLOCK(recovery_lock);
static int recovery_phase;
static const unsigned long recovery_delay[] = { 3, 30, 300 };
@ -1535,7 +1535,7 @@ static int recovery_check(struct device *dev, void *data)
return 0;
}
static void recovery_func(unsigned long data)
static void recovery_work_func(struct work_struct *unused)
{
int redo = 0;
@ -1553,6 +1553,17 @@ static void recovery_func(unsigned long data)
CIO_MSG_EVENT(2, "recovery: end\n");
}
static DECLARE_WORK(recovery_work, recovery_work_func);
static void recovery_func(unsigned long data)
{
/*
* We can't do our recovery in softirq context and it's not
* performance critical, so we schedule it.
*/
schedule_work(&recovery_work);
}
void ccw_device_schedule_recovery(void)
{
unsigned long flags;

13
drivers/s390/cio/qdio.c
View File

@ -32,7 +32,7 @@
#include <linux/module.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/proc_fs.h>
@ -1215,9 +1215,6 @@ tiqdio_is_inbound_q_done(struct qdio_q *q)
if (!no_used)
return 1;
if (!q->siga_sync && !irq->is_qebsm)
/* we'll check for more primed buffers in qeth_stop_polling */
return 0;
if (irq->is_qebsm) {
count = 1;
start_buf = q->first_to_check;
@ -3332,13 +3329,7 @@ qdio_activate(struct ccw_device *cdev, int flags)
}
}
wait_event_interruptible_timeout(cdev->private->wait_q,
((irq_ptr->state ==
QDIO_IRQ_STATE_STOPPED) ||
(irq_ptr->state ==
QDIO_IRQ_STATE_ERR)),
QDIO_ACTIVATE_TIMEOUT);
msleep(QDIO_ACTIVATE_TIMEOUT);
switch (irq_ptr->state) {
case QDIO_IRQ_STATE_STOPPED:
case QDIO_IRQ_STATE_ERR:

2
drivers/s390/cio/qdio.h
View File

@ -57,10 +57,10 @@
of the queue to 0 */
#define QDIO_ESTABLISH_TIMEOUT (1*HZ)
#define QDIO_ACTIVATE_TIMEOUT (5*HZ)
#define QDIO_CLEANUP_CLEAR_TIMEOUT (20*HZ)
#define QDIO_CLEANUP_HALT_TIMEOUT (10*HZ)
#define QDIO_FORCE_CHECK_TIMEOUT (10*HZ)
#define QDIO_ACTIVATE_TIMEOUT (5) /* 5 ms */
enum qdio_irq_states {
QDIO_IRQ_STATE_INACTIVE,

20
include/asm-s390/bitops.h
View File

@ -456,16 +456,18 @@ static inline unsigned long __ffz_word_loop(const unsigned long *addr,
asm volatile(
#ifndef __s390x__
" ahi %1,31\n"
" srl %1,5\n"
" ahi %1,-1\n"
" sra %1,5\n"
" jz 1f\n"
"0: c %2,0(%0,%3)\n"
" jne 1f\n"
" la %0,4(%0)\n"
" brct %1,0b\n"
"1:\n"
#else
" aghi %1,63\n"
" srlg %1,%1,6\n"
" aghi %1,-1\n"
" srag %1,%1,6\n"
" jz 1f\n"
"0: cg %2,0(%0,%3)\n"
" jne 1f\n"
" la %0,8(%0)\n"
@ -491,16 +493,18 @@ static inline unsigned long __ffs_word_loop(const unsigned long *addr,
asm volatile(
#ifndef __s390x__
" ahi %1,31\n"
" srl %1,5\n"
" ahi %1,-1\n"
" sra %1,5\n"
" jz 1f\n"
"0: c %2,0(%0,%3)\n"
" jne 1f\n"
" la %0,4(%0)\n"
" brct %1,0b\n"
"1:\n"
#else
" aghi %1,63\n"
" srlg %1,%1,6\n"
" aghi %1,-1\n"
" srag %1,%1,6\n"
" jz 1f\n"
"0: cg %2,0(%0,%3)\n"
" jne 1f\n"
" la %0,8(%0)\n"