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genirq: Add affinity hint to irq allocation

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Add an extra argument to the irq(domain) allocation functions, so we can hand
down affinity hints to the allocator. Thats necessary to implement proper
support for multiqueue devices.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: linux-block@vger.kernel.org
Cc: linux-pci@vger.kernel.org
Cc: linux-nvme@lists.infradead.org
Cc: axboe@fb.com
Cc: agordeev@redhat.com
Link: http://lkml.kernel.org/r/1467621574-8277-4-git-send-email-hch@lst.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner 2016-07-04 17:39:24 +09:00
parent 9c2555835b
commit 06ee6d571f
9 changed files with 41 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/sparc/kernel/irq_64.c
View File

@ -242,7 +242,7 @@ unsigned int irq_alloc(unsigned int dev_handle, unsigned int dev_ino)
{
int irq;
irq = __irq_alloc_descs(-1, 1, 1, numa_node_id(), NULL);
irq = __irq_alloc_descs(-1, 1, 1, numa_node_id(), NULL, NULL);
if (irq <= 0)
goto out;

5
arch/x86/kernel/apic/io_apic.c
View File

@ -981,7 +981,7 @@ static int alloc_irq_from_domain(struct irq_domain *domain, int ioapic, u32 gsi,
return __irq_domain_alloc_irqs(domain, irq, 1,
ioapic_alloc_attr_node(info),
info, legacy);
info, legacy, NULL);
}
/*
@ -1014,7 +1014,8 @@ static int alloc_isa_irq_from_domain(struct irq_domain *domain,
info->ioapic_pin))
return -ENOMEM;
} else {
irq = __irq_domain_alloc_irqs(domain, irq, 1, node, info, true);
irq = __irq_domain_alloc_irqs(domain, irq, 1, node, info, true,
NULL);
if (irq >= 0) {
irq_data = irq_domain_get_irq_data(domain, irq);
data = irq_data->chip_data;

4
include/linux/irq.h
View File

@ -708,11 +708,11 @@ static inline struct cpumask *irq_data_get_affinity_mask(struct irq_data *d)
unsigned int arch_dynirq_lower_bound(unsigned int from);
int __irq_alloc_descs(int irq, unsigned int from, unsigned int cnt, int node,
struct module *owner);
struct module *owner, const struct cpumask *affinity);
/* use macros to avoid needing export.h for THIS_MODULE */
#define irq_alloc_descs(irq, from, cnt, node) \
__irq_alloc_descs(irq, from, cnt, node, THIS_MODULE)
__irq_alloc_descs(irq, from, cnt, node, THIS_MODULE, NULL)
#define irq_alloc_desc(node) \
irq_alloc_descs(-1, 0, 1, node)

9
include/linux/irqdomain.h
View File

@ -39,6 +39,7 @@ struct irq_domain;
struct of_device_id;
struct irq_chip;
struct irq_data;
struct cpumask;
/* Number of irqs reserved for a legacy isa controller */
#define NUM_ISA_INTERRUPTS 16
@ -217,7 +218,8 @@ extern struct irq_domain *irq_find_matching_fwspec(struct irq_fwspec *fwspec,
enum irq_domain_bus_token bus_token);
extern void irq_set_default_host(struct irq_domain *host);
extern int irq_domain_alloc_descs(int virq, unsigned int nr_irqs,
irq_hw_number_t hwirq, int node);
irq_hw_number_t hwirq, int node,
const struct cpumask *affinity);
static inline struct fwnode_handle *of_node_to_fwnode(struct device_node *node)
{
@ -389,7 +391,7 @@ static inline struct irq_domain *irq_domain_add_hierarchy(struct irq_domain *par
extern int __irq_domain_alloc_irqs(struct irq_domain *domain, int irq_base,
unsigned int nr_irqs, int node, void *arg,
bool realloc);
bool realloc, const struct cpumask *affinity);
extern void irq_domain_free_irqs(unsigned int virq, unsigned int nr_irqs);
extern void irq_domain_activate_irq(struct irq_data *irq_data);
extern void irq_domain_deactivate_irq(struct irq_data *irq_data);
@ -397,7 +399,8 @@ extern void irq_domain_deactivate_irq(struct irq_data *irq_data);
static inline int irq_domain_alloc_irqs(struct irq_domain *domain,
unsigned int nr_irqs, int node, void *arg)
{
return __irq_domain_alloc_irqs(domain, -1, nr_irqs, node, arg, false);
return __irq_domain_alloc_irqs(domain, -1, nr_irqs, node, arg, false,
NULL);
}
extern int irq_domain_alloc_irqs_recursive(struct irq_domain *domain,

2
kernel/irq/ipi.c
View File

@ -76,7 +76,7 @@ int irq_reserve_ipi(struct irq_domain *domain,
}
}
virq = irq_domain_alloc_descs(-1, nr_irqs, 0, NUMA_NO_NODE);
virq = irq_domain_alloc_descs(-1, nr_irqs, 0, NUMA_NO_NODE, NULL);
if (virq <= 0) {
pr_warn("Can't reserve IPI, failed to alloc descs\n");
return -ENOMEM;

12
kernel/irq/irqdesc.c
View File

@ -223,7 +223,7 @@ static void free_desc(unsigned int irq)
}
static int alloc_descs(unsigned int start, unsigned int cnt, int node,
struct module *owner)
const struct cpumask *affinity, struct module *owner)
{
struct irq_desc *desc;
int i;
@ -333,6 +333,7 @@ static void free_desc(unsigned int irq)
}
static inline int alloc_descs(unsigned int start, unsigned int cnt, int node,
const struct cpumask *affinity,
struct module *owner)
{
u32 i;
@ -453,12 +454,15 @@ EXPORT_SYMBOL_GPL(irq_free_descs);
* @cnt: Number of consecutive irqs to allocate.
* @node: Preferred node on which the irq descriptor should be allocated
* @owner: Owning module (can be NULL)
* @affinity: Optional pointer to an affinity mask which hints where the
* irq descriptors should be allocated and which default
* affinities to use
*
* Returns the first irq number or error code
*/
int __ref
__irq_alloc_descs(int irq, unsigned int from, unsigned int cnt, int node,
struct module *owner)
struct module *owner, const struct cpumask *affinity)
{
int start, ret;
@ -494,7 +498,7 @@ __irq_alloc_descs(int irq, unsigned int from, unsigned int cnt, int node,
bitmap_set(allocated_irqs, start, cnt);
mutex_unlock(&sparse_irq_lock);
return alloc_descs(start, cnt, node, owner);
return alloc_descs(start, cnt, node, affinity, owner);
err:
mutex_unlock(&sparse_irq_lock);
@ -512,7 +516,7 @@ EXPORT_SYMBOL_GPL(__irq_alloc_descs);
*/
unsigned int irq_alloc_hwirqs(int cnt, int node)
{
int i, irq = __irq_alloc_descs(-1, 0, cnt, node, NULL);
int i, irq = __irq_alloc_descs(-1, 0, cnt, node, NULL, NULL);
if (irq < 0)
return 0;

22
kernel/irq/irqdomain.c
View File

@ -481,7 +481,7 @@ unsigned int irq_create_mapping(struct irq_domain *domain,
}
/* Allocate a virtual interrupt number */
virq = irq_domain_alloc_descs(-1, 1, hwirq, of_node_to_nid(of_node));
virq = irq_domain_alloc_descs(-1, 1, hwirq, of_node_to_nid(of_node), NULL);
if (virq <= 0) {
pr_debug("-> virq allocation failed\n");
return 0;
@ -835,19 +835,23 @@ const struct irq_domain_ops irq_domain_simple_ops = {
EXPORT_SYMBOL_GPL(irq_domain_simple_ops);
int irq_domain_alloc_descs(int virq, unsigned int cnt, irq_hw_number_t hwirq,
int node)
int node, const struct cpumask *affinity)
{
unsigned int hint;
if (virq >= 0) {
virq = irq_alloc_descs(virq, virq, cnt, node);
virq = __irq_alloc_descs(virq, virq, cnt, node, THIS_MODULE,
affinity);
} else {
hint = hwirq % nr_irqs;
if (hint == 0)
hint++;
virq = irq_alloc_descs_from(hint, cnt, node);
if (virq <= 0 && hint > 1)
virq = irq_alloc_descs_from(1, cnt, node);
virq = __irq_alloc_descs(-1, hint, cnt, node, THIS_MODULE,
affinity);
if (virq <= 0 && hint > 1) {
virq = __irq_alloc_descs(-1, 1, cnt, node, THIS_MODULE,
affinity);
}
}
return virq;
@ -1160,6 +1164,7 @@ int irq_domain_alloc_irqs_recursive(struct irq_domain *domain,
* @node: NUMA node id for memory allocation
* @arg: domain specific argument
* @realloc: IRQ descriptors have already been allocated if true
* @affinity: Optional irq affinity mask for multiqueue devices
*
* Allocate IRQ numbers and initialized all data structures to support
* hierarchy IRQ domains.
@ -1175,7 +1180,7 @@ int irq_domain_alloc_irqs_recursive(struct irq_domain *domain,
*/
int __irq_domain_alloc_irqs(struct irq_domain *domain, int irq_base,
unsigned int nr_irqs, int node, void *arg,
bool realloc)
bool realloc, const struct cpumask *affinity)
{
int i, ret, virq;
@ -1193,7 +1198,8 @@ int __irq_domain_alloc_irqs(struct irq_domain *domain, int irq_base,
if (realloc && irq_base >= 0) {
virq = irq_base;
} else {
virq = irq_domain_alloc_descs(irq_base, nr_irqs, 0, node);
virq = irq_domain_alloc_descs(irq_base, nr_irqs, 0, node,
affinity);
if (virq < 0) {
pr_debug("cannot allocate IRQ(base %d, count %d)\n",
irq_base, nr_irqs);

7
kernel/irq/manage.c
View File

@ -353,10 +353,11 @@ static int setup_affinity(struct irq_desc *desc, struct cpumask *mask)
return 0;
/*
* Preserve an userspace affinity setup, but make sure that
* one of the targets is online.
* Preserve the managed affinity setting and an userspace affinity
* setup, but make sure that one of the targets is online.
*/
if (irqd_has_set(&desc->irq_data, IRQD_AFFINITY_SET)) {
if (irqd_affinity_is_managed(&desc->irq_data) ||
irqd_has_set(&desc->irq_data, IRQD_AFFINITY_SET)) {
if (cpumask_intersects(desc->irq_common_data.affinity,
cpu_online_mask))
set = desc->irq_common_data.affinity;

3
kernel/irq/msi.c
View File

@ -334,7 +334,8 @@ int msi_domain_alloc_irqs(struct irq_domain *domain, struct device *dev,
ops->set_desc(&arg, desc);
virq = __irq_domain_alloc_irqs(domain, -1, desc->nvec_used,
dev_to_node(dev), &arg, false);
dev_to_node(dev), &arg, false,
NULL);
if (virq < 0) {
ret = -ENOSPC;
if (ops->handle_error)