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powerpc/cpumask: Convert mpic driver to new cpumask API

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Convert to the new cpumask API.

irq_choose_cpu can be simplified by using cpumask_next and cpumask_first.

smp_mpic_message_pass was doing open coded cpumask manipulation and passing an
int for a cpumask into mpic_send_ipi. Since mpic_send_ipi is only used
locally, make it static and convert it to take a cpumask. This allows us
to clean up the mess in smp_mpic_message_pass.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Benjamin Herrenschmidt 2010-05-06 18:01:46 +10:00
parent 828a69869b
commit 2ef613cb94
2 changed files with 39 additions and 36 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
arch/powerpc/include/asm/mpic.h
View File

@ -463,9 +463,6 @@ extern void mpic_cpu_set_priority(int prio);
/* Request IPIs on primary mpic */
extern void mpic_request_ipis(void);
/* Send an IPI (non offseted number 0..3) */
extern void mpic_send_ipi(unsigned int ipi_no, unsigned int cpu_mask);
/* Send a message (IPI) to a given target (cpu number or MSG_*) */
void smp_mpic_message_pass(int target, int msg);

72
arch/powerpc/sysdev/mpic.c
View File

@ -568,12 +568,12 @@ static void __init mpic_scan_ht_pics(struct mpic *mpic)
#endif /* CONFIG_MPIC_U3_HT_IRQS */
#ifdef CONFIG_SMP
static int irq_choose_cpu(const cpumask_t *mask)
static int irq_choose_cpu(const struct cpumask *mask)
{
int cpuid;
if (cpumask_equal(mask, cpu_all_mask)) {
static int irq_rover;
static int irq_rover = 0;
static DEFINE_RAW_SPINLOCK(irq_rover_lock);
unsigned long flags;
@ -581,15 +581,11 @@ static int irq_choose_cpu(const cpumask_t *mask)
do_round_robin:
raw_spin_lock_irqsave(&irq_rover_lock, flags);
while (!cpu_online(irq_rover)) {
if (++irq_rover >= NR_CPUS)
irq_rover = 0;
}
irq_rover = cpumask_next(irq_rover, cpu_online_mask);
if (irq_rover >= nr_cpu_ids)
irq_rover = cpumask_first(cpu_online_mask);
cpuid = irq_rover;
do {
if (++irq_rover >= NR_CPUS)
irq_rover = 0;
} while (!cpu_online(irq_rover));
raw_spin_unlock_irqrestore(&irq_rover_lock, flags);
} else {
@ -601,7 +597,7 @@ static int irq_choose_cpu(const cpumask_t *mask)
return get_hard_smp_processor_id(cpuid);
}
#else
static int irq_choose_cpu(const cpumask_t *mask)
static int irq_choose_cpu(const struct cpumask *mask)
{
return hard_smp_processor_id();
}
@ -814,12 +810,16 @@ int mpic_set_affinity(unsigned int irq, const struct cpumask *cpumask)
mpic_irq_write(src, MPIC_INFO(IRQ_DESTINATION), 1 << cpuid);
} else {
cpumask_t tmp;
cpumask_var_t tmp;
cpumask_and(&tmp, cpumask, cpu_online_mask);
alloc_cpumask_var(&tmp, GFP_KERNEL);
cpumask_and(tmp, cpumask, cpu_online_mask);
mpic_irq_write(src, MPIC_INFO(IRQ_DESTINATION),
mpic_physmask(cpus_addr(tmp)[0]));
mpic_physmask(cpumask_bits(tmp)[0]));
free_cpumask_var(tmp);
}
return 0;
@ -1479,21 +1479,6 @@ void mpic_teardown_this_cpu(int secondary)
}
void mpic_send_ipi(unsigned int ipi_no, unsigned int cpu_mask)
{
struct mpic *mpic = mpic_primary;
BUG_ON(mpic == NULL);
#ifdef DEBUG_IPI
DBG("%s: send_ipi(ipi_no: %d)\n", mpic->name, ipi_no);
#endif
mpic_cpu_write(MPIC_INFO(CPU_IPI_DISPATCH_0) +
ipi_no * MPIC_INFO(CPU_IPI_DISPATCH_STRIDE),
mpic_physmask(cpu_mask & cpus_addr(cpu_online_map)[0]));
}
static unsigned int _mpic_get_one_irq(struct mpic *mpic, int reg)
{
u32 src;
@ -1589,8 +1574,25 @@ void mpic_request_ipis(void)
}
}
static void mpic_send_ipi(unsigned int ipi_no, const struct cpumask *cpu_mask)
{
struct mpic *mpic = mpic_primary;
BUG_ON(mpic == NULL);
#ifdef DEBUG_IPI
DBG("%s: send_ipi(ipi_no: %d)\n", mpic->name, ipi_no);
#endif
mpic_cpu_write(MPIC_INFO(CPU_IPI_DISPATCH_0) +
ipi_no * MPIC_INFO(CPU_IPI_DISPATCH_STRIDE),
mpic_physmask(cpumask_bits(cpu_mask)[0]));
}
void smp_mpic_message_pass(int target, int msg)
{
cpumask_var_t tmp;
/* make sure we're sending something that translates to an IPI */
if ((unsigned int)msg > 3) {
printk("SMP %d: smp_message_pass: unknown msg %d\n",
@ -1599,13 +1601,17 @@ void smp_mpic_message_pass(int target, int msg)
}
switch (target) {
case MSG_ALL:
mpic_send_ipi(msg, 0xffffffff);
mpic_send_ipi(msg, cpu_online_mask);
break;
case MSG_ALL_BUT_SELF:
mpic_send_ipi(msg, 0xffffffff & ~(1 << smp_processor_id()));
alloc_cpumask_var(&tmp, GFP_NOWAIT);
cpumask_andnot(tmp, cpu_online_mask,
cpumask_of(smp_processor_id()));
mpic_send_ipi(msg, tmp);
free_cpumask_var(tmp);
break;
default:
mpic_send_ipi(msg, 1 << target);
mpic_send_ipi(msg, cpumask_of(target));
break;
}
}
@ -1616,7 +1622,7 @@ int __init smp_mpic_probe(void)
DBG("smp_mpic_probe()...\n");
nr_cpus = cpus_weight(cpu_possible_map);
nr_cpus = cpumask_weight(cpu_possible_mask);
DBG("nr_cpus: %d\n", nr_cpus);