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Commit 7f3262ed authored by Jiang Liu's avatar Jiang Liu Committed by Thomas Gleixner
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x86/irq: Move private data in struct irq_cfg into dedicated data structure 

Several fields in struct irq_cfg are private to vector.c, so move it
into dedicated data structure. This helps to hide implementation
details.
Signed-off-by: default avatarJiang Liu <jiang.liu@linux.intel.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: David Cohen <david.a.cohen@linux.intel.com>
Cc: Sander Eikelenboom <linux@eikelenboom.it>
Cc: David Vrabel <david.vrabel@citrix.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dimitri Sivanich <sivanich@sgi.com>
Link: http://lkml.kernel.org/r/1428978610-28986-27-git-send-email-jiang.liu@linux.intel.comSigned-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Link: http://lkml.kernel.org/r/1416901802-24211-35-git-send-email-jiang.liu@linux.intel.comSigned-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Tested-by: default avatarJoerg Roedel <jroedel@suse.de>
parent c6c2002b
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Showing with 119 additions and 105 deletions
arch/x86/include/asm/hw_irq.h
View file @ 7f3262ed
......@@ -171,11 +171,8 @@ enum {
};
struct irq_cfg {
cpumask_var_t domain;
cpumask_var_t old_domain;
unsigned int dest_apicid;
u8 vector;
u8 move_in_progress : 1;
};
extern struct irq_domain *x86_vector_domain;
......
arch/x86/kernel/apic/vector.c
View file @ 7f3262ed
......@@ -21,11 +21,18 @@
#include <asm/desc.h>
#include <asm/irq_remapping.h>
struct apic_chip_data {
struct irq_cfg cfg;
cpumask_var_t domain;
cpumask_var_t old_domain;
u8 move_in_progress : 1;
};
struct irq_domain *x86_vector_domain;
static DEFINE_RAW_SPINLOCK(vector_lock);
static struct irq_chip lapic_controller;
#ifdef CONFIG_X86_IO_APIC
static struct irq_cfg *legacy_irq_cfgs[NR_IRQS_LEGACY];
static struct apic_chip_data *legacy_irq_data[NR_IRQS_LEGACY];
#endif
void lock_vector_lock(void)
......@@ -41,12 +48,7 @@ void unlock_vector_lock(void)
raw_spin_unlock(&vector_lock);
}
struct irq_cfg *irq_cfg(unsigned int irq)
{
return irqd_cfg(irq_get_irq_data(irq));
}
struct irq_cfg *irqd_cfg(struct irq_data *irq_data)
static struct apic_chip_data *apic_chip_data(struct irq_data *irq_data)
{
if (!irq_data)
return NULL;
......@@ -57,36 +59,48 @@ struct irq_cfg *irqd_cfg(struct irq_data *irq_data)
return irq_data->chip_data;
}
static struct irq_cfg *alloc_irq_cfg(int node)
struct irq_cfg *irqd_cfg(struct irq_data *irq_data)
{
struct irq_cfg *cfg;
struct apic_chip_data *data = apic_chip_data(irq_data);
cfg = kzalloc_node(sizeof(*cfg), GFP_KERNEL, node);
if (!cfg)
return data ? &data->cfg : NULL;
}
struct irq_cfg *irq_cfg(unsigned int irq)
{
return irqd_cfg(irq_get_irq_data(irq));
}
static struct apic_chip_data *alloc_apic_chip_data(int node)
{
struct apic_chip_data *data;
data = kzalloc_node(sizeof(*data), GFP_KERNEL, node);
if (!data)
return NULL;
if (!zalloc_cpumask_var_node(&cfg->domain, GFP_KERNEL, node))
goto out_cfg;
if (!zalloc_cpumask_var_node(&cfg->old_domain, GFP_KERNEL, node))
if (!zalloc_cpumask_var_node(&data->domain, GFP_KERNEL, node))
goto out_data;
if (!zalloc_cpumask_var_node(&data->old_domain, GFP_KERNEL, node))
goto out_domain;
return cfg;
return data;
out_domain:
free_cpumask_var(cfg->domain);
out_cfg:
kfree(cfg);
free_cpumask_var(data->domain);
out_data:
kfree(data);
return NULL;
}
static void free_irq_cfg(struct irq_cfg *cfg)
static void free_apic_chip_data(struct apic_chip_data *data)
{
if (cfg) {
free_cpumask_var(cfg->domain);
free_cpumask_var(cfg->old_domain);
kfree(cfg);
if (data) {
free_cpumask_var(data->domain);
free_cpumask_var(data->old_domain);
kfree(data);
}
}
static int
__assign_irq_vector(int irq, struct irq_cfg *cfg, const struct cpumask *mask)
static int __assign_irq_vector(int irq, struct apic_chip_data *d,
const struct cpumask *mask)
{
/*
* NOTE! The local APIC isn't very good at handling
......@@ -104,7 +118,7 @@ __assign_irq_vector(int irq, struct irq_cfg *cfg, const struct cpumask *mask)
int cpu, err;
cpumask_var_t tmp_mask;
if (cfg->move_in_progress)
if (d->move_in_progress)
return -EBUSY;
if (!alloc_cpumask_var(&tmp_mask, GFP_ATOMIC))
......@@ -112,26 +126,26 @@ __assign_irq_vector(int irq, struct irq_cfg *cfg, const struct cpumask *mask)
/* Only try and allocate irqs on cpus that are present */
err = -ENOSPC;
cpumask_clear(cfg->old_domain);
cpumask_clear(d->old_domain);
cpu = cpumask_first_and(mask, cpu_online_mask);
while (cpu < nr_cpu_ids) {
int new_cpu, vector, offset;
apic->vector_allocation_domain(cpu, tmp_mask, mask);
if (cpumask_subset(tmp_mask, cfg->domain)) {
if (cpumask_subset(tmp_mask, d->domain)) {
err = 0;
if (cpumask_equal(tmp_mask, cfg->domain))
if (cpumask_equal(tmp_mask, d->domain))
break;
/*
* New cpumask using the vector is a proper subset of
* the current in use mask. So cleanup the vector
* allocation for the members that are not used anymore.
*/
cpumask_andnot(cfg->old_domain, cfg->domain, tmp_mask);
cfg->move_in_progress =
cpumask_intersects(cfg->old_domain, cpu_online_mask);
cpumask_and(cfg->domain, cfg->domain, tmp_mask);
cpumask_andnot(d->old_domain, d->domain, tmp_mask);
d->move_in_progress =
cpumask_intersects(d->old_domain, cpu_online_mask);
cpumask_and(d->domain, d->domain, tmp_mask);
break;
}
......@@ -145,8 +159,8 @@ __assign_irq_vector(int irq, struct irq_cfg *cfg, const struct cpumask *mask)
}
if (unlikely(current_vector == vector)) {
cpumask_or(cfg->old_domain, cfg->old_domain, tmp_mask);
cpumask_andnot(tmp_mask, mask, cfg->old_domain);
cpumask_or(d->old_domain, d->old_domain, tmp_mask);
cpumask_andnot(tmp_mask, mask, d->old_domain);
cpu = cpumask_first_and(tmp_mask, cpu_online_mask);
continue;
}
......@@ -162,15 +176,15 @@ __assign_irq_vector(int irq, struct irq_cfg *cfg, const struct cpumask *mask)
/* Found one! */
current_vector = vector;
current_offset = offset;
if (cfg->vector) {
cpumask_copy(cfg->old_domain, cfg->domain);
cfg->move_in_progress =
cpumask_intersects(cfg->old_domain, cpu_online_mask);
if (d->cfg.vector) {
cpumask_copy(d->old_domain, d->domain);
d->move_in_progress =
cpumask_intersects(d->old_domain, cpu_online_mask);
}
for_each_cpu_and(new_cpu, tmp_mask, cpu_online_mask)
per_cpu(vector_irq, new_cpu)[vector] = irq;
cfg->vector = vector;
cpumask_copy(cfg->domain, tmp_mask);
d->cfg.vector = vector;
cpumask_copy(d->domain, tmp_mask);
err = 0;
break;
}
......@@ -178,46 +192,46 @@ __assign_irq_vector(int irq, struct irq_cfg *cfg, const struct cpumask *mask)
if (!err) {
/* cache destination APIC IDs into cfg->dest_apicid */
err = apic->cpu_mask_to_apicid_and(mask, cfg->domain,
&cfg->dest_apicid);
err = apic->cpu_mask_to_apicid_and(mask, d->domain,
&d->cfg.dest_apicid);
}
return err;
}
static int assign_irq_vector(int irq, struct irq_cfg *cfg,
static int assign_irq_vector(int irq, struct apic_chip_data *data,
const struct cpumask *mask)
{
int err;
unsigned long flags;
raw_spin_lock_irqsave(&vector_lock, flags);
err = __assign_irq_vector(irq, cfg, mask);
err = __assign_irq_vector(irq, data, mask);
raw_spin_unlock_irqrestore(&vector_lock, flags);
return err;
}
static void clear_irq_vector(int irq, struct irq_cfg *cfg)
static void clear_irq_vector(int irq, struct apic_chip_data *data)
{
int cpu, vector;
unsigned long flags;
raw_spin_lock_irqsave(&vector_lock, flags);
BUG_ON(!cfg->vector);
BUG_ON(!data->cfg.vector);
vector = cfg->vector;
for_each_cpu_and(cpu, cfg->domain, cpu_online_mask)
vector = data->cfg.vector;
for_each_cpu_and(cpu, data->domain, cpu_online_mask)
per_cpu(vector_irq, cpu)[vector] = VECTOR_UNDEFINED;
cfg->vector = 0;
cpumask_clear(cfg->domain);
data->cfg.vector = 0;
cpumask_clear(data->domain);
if (likely(!cfg->move_in_progress)) {
if (likely(!data->move_in_progress)) {
raw_spin_unlock_irqrestore(&vector_lock, flags);
return;
}
for_each_cpu_and(cpu, cfg->old_domain, cpu_online_mask) {
for_each_cpu_and(cpu, data->old_domain, cpu_online_mask) {
for (vector = FIRST_EXTERNAL_VECTOR; vector < NR_VECTORS;
vector++) {
if (per_cpu(vector_irq, cpu)[vector] != irq)
......@@ -226,7 +240,7 @@ static void clear_irq_vector(int irq, struct irq_cfg *cfg)
break;
}
}
cfg->move_in_progress = 0;
data->move_in_progress = 0;
raw_spin_unlock_irqrestore(&vector_lock, flags);
}
......@@ -261,10 +275,10 @@ static void x86_vector_free_irqs(struct irq_domain *domain,
irq_data = irq_domain_get_irq_data(x86_vector_domain, virq + i);
if (irq_data && irq_data->chip_data) {
clear_irq_vector(virq + i, irq_data->chip_data);
free_irq_cfg(irq_data->chip_data);
free_apic_chip_data(irq_data->chip_data);
#ifdef CONFIG_X86_IO_APIC
if (virq + i < nr_legacy_irqs())
legacy_irq_cfgs[virq + i] = NULL;
legacy_irq_data[virq + i] = NULL;
#endif
irq_domain_reset_irq_data(irq_data);
}
......@@ -275,9 +289,9 @@ static int x86_vector_alloc_irqs(struct irq_domain *domain, unsigned int virq,
unsigned int nr_irqs, void *arg)
{
struct irq_alloc_info *info = arg;
struct apic_chip_data *data;
const struct cpumask *mask;
struct irq_data *irq_data;
struct irq_cfg *cfg;
int i, err;
if (disable_apic)
......@@ -292,20 +306,20 @@ static int x86_vector_alloc_irqs(struct irq_domain *domain, unsigned int virq,
irq_data = irq_domain_get_irq_data(domain, virq + i);
BUG_ON(!irq_data);
#ifdef CONFIG_X86_IO_APIC
if (virq + i < nr_legacy_irqs() && legacy_irq_cfgs[virq + i])
cfg = legacy_irq_cfgs[virq + i];
if (virq + i < nr_legacy_irqs() && legacy_irq_data[virq + i])
data = legacy_irq_data[virq + i];
else
#endif
cfg = alloc_irq_cfg(irq_data->node);
if (!cfg) {
data = alloc_apic_chip_data(irq_data->node);
if (!data) {
err = -ENOMEM;
goto error;
}
irq_data->chip = &lapic_controller;
irq_data->chip_data = cfg;
irq_data->chip_data = data;
irq_data->hwirq = virq + i;
err = assign_irq_vector(virq, cfg, mask);
err = assign_irq_vector(virq, data, mask);
if (err)
goto error;
}
......@@ -349,22 +363,22 @@ int __init arch_probe_nr_irqs(void)
static void init_legacy_irqs(void)
{
int i, node = cpu_to_node(0);
struct irq_cfg *cfg;
struct apic_chip_data *data;
/*
* For legacy IRQ's, start with assigning irq0 to irq15 to
* IRQ0_VECTOR to IRQ15_VECTOR for all cpu's.
*/
for (i = 0; i < nr_legacy_irqs(); i++) {
cfg = legacy_irq_cfgs[i] = alloc_irq_cfg(node);
BUG_ON(!cfg);
data = legacy_irq_data[i] = alloc_apic_chip_data(node);
BUG_ON(!data);
/*
* For legacy IRQ's, start with assigning irq0 to irq15 to
* IRQ0_VECTOR to IRQ15_VECTOR for all cpu's.
*/
cfg->vector = IRQ0_VECTOR + i;
cpumask_setall(cfg->domain);
irq_set_chip_data(i, cfg);
data->cfg.vector = IRQ0_VECTOR + i;
cpumask_setall(data->domain);
irq_set_chip_data(i, data);
}
}
#else
......@@ -390,7 +404,7 @@ static void __setup_vector_irq(int cpu)
{
/* Initialize vector_irq on a new cpu */
int irq, vector;
struct irq_cfg *cfg;
struct apic_chip_data *data;
/*
* vector_lock will make sure that we don't run into irq vector
......@@ -400,13 +414,13 @@ static void __setup_vector_irq(int cpu)
raw_spin_lock(&vector_lock);
/* Mark the inuse vectors */
for_each_active_irq(irq) {
cfg = irq_cfg(irq);
if (!cfg)
data = apic_chip_data(irq_get_irq_data(irq));
if (!data)
continue;
if (!cpumask_test_cpu(cpu, cfg->domain))
if (!cpumask_test_cpu(cpu, data->domain))
continue;
vector = cfg->vector;
vector = data->cfg.vector;
per_cpu(vector_irq, cpu)[vector] = irq;
}
/* Mark the free vectors */
......@@ -415,8 +429,8 @@ static void __setup_vector_irq(int cpu)
if (irq <= VECTOR_UNDEFINED)
continue;
cfg = irq_cfg(irq);
if (!cpumask_test_cpu(cpu, cfg->domain))
data = apic_chip_data(irq_get_irq_data(irq));
if (!cpumask_test_cpu(cpu, data->domain))
per_cpu(vector_irq, cpu)[vector] = VECTOR_UNDEFINED;
}
raw_spin_unlock(&vector_lock);
......@@ -442,15 +456,15 @@ void setup_vector_irq(int cpu)
__setup_vector_irq(cpu);
}
static int apic_retrigger_irq(struct irq_data *data)
static int apic_retrigger_irq(struct irq_data *irq_data)
{
struct irq_cfg *cfg = irqd_cfg(data);
struct apic_chip_data *data = apic_chip_data(irq_data);
unsigned long flags;
int cpu;
raw_spin_lock_irqsave(&vector_lock, flags);
cpu = cpumask_first_and(cfg->domain, cpu_online_mask);
apic->send_IPI_mask(cpumask_of(cpu), cfg->vector);
cpu = cpumask_first_and(data->domain, cpu_online_mask);
apic->send_IPI_mask(cpumask_of(cpu), data->cfg.vector);
raw_spin_unlock_irqrestore(&vector_lock, flags);
return 1;
......@@ -466,7 +480,7 @@ void apic_ack_edge(struct irq_data *data)
static int apic_set_affinity(struct irq_data *irq_data,
const struct cpumask *dest, bool force)
{
struct irq_cfg *cfg = irq_data->chip_data;
struct apic_chip_data *data = irq_data->chip_data;
int err, irq = irq_data->irq;
if (!config_enabled(CONFIG_SMP))
......@@ -475,11 +489,11 @@ static int apic_set_affinity(struct irq_data *irq_data,
if (!cpumask_intersects(dest, cpu_online_mask))
return -EINVAL;
err = assign_irq_vector(irq, cfg, dest);
err = assign_irq_vector(irq, data, dest);
if (err) {
struct irq_data *top = irq_get_irq_data(irq);
if (assign_irq_vector(irq, cfg, top->affinity))
if (assign_irq_vector(irq, data, top->affinity))
pr_err("Failed to recover vector for irq %d\n", irq);
return err;
}
......@@ -494,28 +508,31 @@ static struct irq_chip lapic_controller = {
};
#ifdef CONFIG_SMP
static void __send_cleanup_vector(struct irq_cfg *cfg)
static void __send_cleanup_vector(struct apic_chip_data *data)
{
cpumask_var_t cleanup_mask;
if (unlikely(!alloc_cpumask_var(&cleanup_mask, GFP_ATOMIC))) {
unsigned int i;
for_each_cpu_and(i, cfg->old_domain, cpu_online_mask)
for_each_cpu_and(i, data->old_domain, cpu_online_mask)
apic->send_IPI_mask(cpumask_of(i),
IRQ_MOVE_CLEANUP_VECTOR);
} else {
cpumask_and(cleanup_mask, cfg->old_domain, cpu_online_mask);
cpumask_and(cleanup_mask, data->old_domain, cpu_online_mask);
apic->send_IPI_mask(cleanup_mask, IRQ_MOVE_CLEANUP_VECTOR);
free_cpumask_var(cleanup_mask);
}
cfg->move_in_progress = 0;
data->move_in_progress = 0;
}
void send_cleanup_vector(struct irq_cfg *cfg)
{
if (cfg->move_in_progress)
__send_cleanup_vector(cfg);
struct apic_chip_data *data;
data = container_of(cfg, struct apic_chip_data, cfg);
if (data->move_in_progress)
__send_cleanup_vector(data);
}
asmlinkage __visible void smp_irq_move_cleanup_interrupt(void)
......@@ -531,7 +548,7 @@ asmlinkage __visible void smp_irq_move_cleanup_interrupt(void)
int irq;
unsigned int irr;
struct irq_desc *desc;
struct irq_cfg *cfg;
struct apic_chip_data *data;
irq = __this_cpu_read(vector_irq[vector]);
......@@ -542,8 +559,8 @@ asmlinkage __visible void smp_irq_move_cleanup_interrupt(void)
if (!desc)
continue;
cfg = irq_cfg(irq);
if (!cfg)
data = apic_chip_data(&desc->irq_data);
if (!data)
continue;
raw_spin_lock(&desc->lock);
......@@ -552,10 +569,11 @@ asmlinkage __visible void smp_irq_move_cleanup_interrupt(void)
* Check if the irq migration is in progress. If so, we
* haven't received the cleanup request yet for this irq.
*/
if (cfg->move_in_progress)
if (data->move_in_progress)
goto unlock;
if (vector == cfg->vector && cpumask_test_cpu(me, cfg->domain))
if (vector == data->cfg.vector &&
cpumask_test_cpu(me, data->domain))
goto unlock;
irr = apic_read(APIC_IRR + (vector / 32 * 0x10));
......@@ -581,14 +599,15 @@ asmlinkage __visible void smp_irq_move_cleanup_interrupt(void)
static void __irq_complete_move(struct irq_cfg *cfg, unsigned vector)
{
unsigned me;
struct apic_chip_data *data;
if (likely(!cfg->move_in_progress))
data = container_of(cfg, struct apic_chip_data, cfg);
if (likely(!data->move_in_progress))
return;
me = smp_processor_id();
if (vector == cfg->vector && cpumask_test_cpu(me, cfg->domain))
__send_cleanup_vector(cfg);
if (vector == data->cfg.vector && cpumask_test_cpu(me, data->domain))
__send_cleanup_vector(data);
}
void irq_complete_move(struct irq_cfg *cfg)
......@@ -600,9 +619,7 @@ void irq_force_complete_move(int irq)
{
struct irq_cfg *cfg = irq_cfg(irq);
if (!cfg)
return;
if (cfg)
__irq_complete_move(cfg, cfg->vector);
}
#endif
......
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