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IB/ehca: Serialize hypervisor calls in ehca_register_mr()

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Some pSeries hypervisor versions show a race condition in the allocate
MR hCall.  Serialize this call per adapter to circumvent this problem.

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Stefan Roscher 2007-05-09 13:47:56 +02:00 committed by Roland Dreier
parent 8f140b407f
commit 5d88278e3b
3 changed files with 14 additions and 2 deletions
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1
drivers/infiniband/hw/ehca/ehca_classes.h
View File

@ -277,6 +277,7 @@ void ehca_cleanup_mrmw_cache(void);
extern spinlock_t ehca_qp_idr_lock;
extern spinlock_t ehca_cq_idr_lock;
extern spinlock_t hcall_lock;
extern struct idr ehca_qp_idr;
extern struct idr ehca_cq_idr;

2
drivers/infiniband/hw/ehca/ehca_main.c
View File

@ -98,6 +98,7 @@ MODULE_PARM_DESC(scaling_code,
spinlock_t ehca_qp_idr_lock;
spinlock_t ehca_cq_idr_lock;
spinlock_t hcall_lock;
DEFINE_IDR(ehca_qp_idr);
DEFINE_IDR(ehca_cq_idr);
@ -817,6 +818,7 @@ int __init ehca_module_init(void)
idr_init(&ehca_cq_idr);
spin_lock_init(&ehca_qp_idr_lock);
spin_lock_init(&ehca_cq_idr_lock);
spin_lock_init(&hcall_lock);
INIT_LIST_HEAD(&shca_list);
spin_lock_init(&shca_list_lock);

13
drivers/infiniband/hw/ehca/hcp_if.c
View File

@ -154,7 +154,8 @@ static long ehca_plpar_hcall9(unsigned long opcode,
unsigned long arg9)
{
long ret;
int i, sleep_msecs;
int i, sleep_msecs, lock_is_set = 0;
unsigned long flags;
ehca_gen_dbg("opcode=%lx arg1=%lx arg2=%lx arg3=%lx arg4=%lx "
"arg5=%lx arg6=%lx arg7=%lx arg8=%lx arg9=%lx",
@ -162,10 +163,18 @@ static long ehca_plpar_hcall9(unsigned long opcode,
arg8, arg9);
for (i = 0; i < 5; i++) {
if ((opcode == H_ALLOC_RESOURCE) && (arg2 == 5)) {
spin_lock_irqsave(&hcall_lock, flags);
lock_is_set = 1;
}
ret = plpar_hcall9(opcode, outs,
arg1, arg2, arg3, arg4, arg5,
arg6, arg7, arg8, arg9);
if (lock_is_set)
spin_unlock_irqrestore(&hcall_lock, flags);
if (H_IS_LONG_BUSY(ret)) {
sleep_msecs = get_longbusy_msecs(ret);
msleep_interruptible(sleep_msecs);
@ -193,11 +202,11 @@ static long ehca_plpar_hcall9(unsigned long opcode,
opcode, ret, outs[0], outs[1], outs[2], outs[3],
outs[4], outs[5], outs[6], outs[7], outs[8]);
return ret;
}
return H_BUSY;
}
u64 hipz_h_alloc_resource_eq(const struct ipz_adapter_handle adapter_handle,
struct ehca_pfeq *pfeq,
const u32 neq_control,