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kernel/drivers/irqchip/irq-mvebu-gicp.c
Kees Cook a86854d0c5 treewide: devm_kzalloc() -> devm_kcalloc() 
The devm_kzalloc() function has a 2-factor argument form, devm_kcalloc().
This patch replaces cases of:

        devm_kzalloc(handle, a * b, gfp)

with:
        devm_kcalloc(handle, a * b, gfp)

as well as handling cases of:

        devm_kzalloc(handle, a * b * c, gfp)

with:

        devm_kzalloc(handle, array3_size(a, b, c), gfp)

as it's slightly less ugly than:

        devm_kcalloc(handle, array_size(a, b), c, gfp)

This does, however, attempt to ignore constant size factors like:

        devm_kzalloc(handle, 4 * 1024, gfp)

though any constants defined via macros get caught up in the conversion.

Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.

Some manual whitespace fixes were needed in this patch, as Coccinelle
really liked to write "=devm_kcalloc..." instead of "= devm_kcalloc...".

The Coccinelle script used for this was:

// Fix redundant parens around sizeof().
@@
expression HANDLE;
type TYPE;
expression THING, E;
@@

(
  devm_kzalloc(HANDLE,
-	(sizeof(TYPE)) * E
+	sizeof(TYPE) * E
  , ...)
|
  devm_kzalloc(HANDLE,
-	(sizeof(THING)) * E
+	sizeof(THING) * E
  , ...)
)

// Drop single-byte sizes and redundant parens.
@@
expression HANDLE;
expression COUNT;
typedef u8;
typedef __u8;
@@

(
  devm_kzalloc(HANDLE,
-	sizeof(u8) * (COUNT)
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(__u8) * (COUNT)
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(char) * (COUNT)
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(unsigned char) * (COUNT)
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(u8) * COUNT
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(__u8) * COUNT
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(char) * COUNT
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(unsigned char) * COUNT
+	COUNT
  , ...)
)

// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
expression HANDLE;
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@

(
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * (COUNT_ID)
+	COUNT_ID, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * COUNT_ID
+	COUNT_ID, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * (COUNT_CONST)
+	COUNT_CONST, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * COUNT_CONST
+	COUNT_CONST, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * (COUNT_ID)
+	COUNT_ID, sizeof(THING)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * COUNT_ID
+	COUNT_ID, sizeof(THING)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * (COUNT_CONST)
+	COUNT_CONST, sizeof(THING)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * COUNT_CONST
+	COUNT_CONST, sizeof(THING)
  , ...)
)

// 2-factor product, only identifiers.
@@
expression HANDLE;
identifier SIZE, COUNT;
@@

- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	SIZE * COUNT
+	COUNT, SIZE
  , ...)

// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression HANDLE;
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@

(
  devm_kzalloc(HANDLE,
-	sizeof(TYPE) * (COUNT) * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE) * (COUNT) * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE) * COUNT * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE) * COUNT * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING) * (COUNT) * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING) * (COUNT) * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING) * COUNT * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING) * COUNT * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
)

// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression HANDLE;
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@

(
  devm_kzalloc(HANDLE,
-	sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+	array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING1) * sizeof(THING2) * COUNT
+	array3_size(COUNT, sizeof(THING1), sizeof(THING2))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(THING1), sizeof(THING2))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE1) * sizeof(THING2) * COUNT
+	array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
  , ...)
)

// 3-factor product, only identifiers, with redundant parens removed.
@@
expression HANDLE;
identifier STRIDE, SIZE, COUNT;
@@

(
  devm_kzalloc(HANDLE,
-	(COUNT) * STRIDE * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	COUNT * (STRIDE) * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	COUNT * STRIDE * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	(COUNT) * (STRIDE) * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	COUNT * (STRIDE) * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	(COUNT) * STRIDE * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	(COUNT) * (STRIDE) * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	COUNT * STRIDE * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
)

// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression HANDLE;
expression E1, E2, E3;
constant C1, C2, C3;
@@

(
  devm_kzalloc(HANDLE, C1 * C2 * C3, ...)
|
  devm_kzalloc(HANDLE,
-	(E1) * E2 * E3
+	array3_size(E1, E2, E3)
  , ...)
|
  devm_kzalloc(HANDLE,
-	(E1) * (E2) * E3
+	array3_size(E1, E2, E3)
  , ...)
|
  devm_kzalloc(HANDLE,
-	(E1) * (E2) * (E3)
+	array3_size(E1, E2, E3)
  , ...)
|
  devm_kzalloc(HANDLE,
-	E1 * E2 * E3
+	array3_size(E1, E2, E3)
  , ...)
)

// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression HANDLE;
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@

(
  devm_kzalloc(HANDLE, sizeof(THING) * C2, ...)
|
  devm_kzalloc(HANDLE, sizeof(TYPE) * C2, ...)
|
  devm_kzalloc(HANDLE, C1 * C2 * C3, ...)
|
  devm_kzalloc(HANDLE, C1 * C2, ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * (E2)
+	E2, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * E2
+	E2, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * (E2)
+	E2, sizeof(THING)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * E2
+	E2, sizeof(THING)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	(E1) * E2
+	E1, E2
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	(E1) * (E2)
+	E1, E2
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	E1 * E2
+	E1, E2
  , ...)
)

Signed-off-by: Kees Cook <keescook@chromium.org>
2018-06-12 16:19:22 -07:00

264 lines
6.4 KiB
C
Raw Blame History

/*
* Copyright (C) 2017 Marvell
*
* Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/msi.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <dt-bindings/interrupt-controller/arm-gic.h>
#define GICP_SETSPI_NSR_OFFSET 0x0
#define GICP_CLRSPI_NSR_OFFSET 0x8
struct mvebu_gicp_spi_range {
unsigned int start;
unsigned int count;
};
struct mvebu_gicp {
struct mvebu_gicp_spi_range *spi_ranges;
unsigned int spi_ranges_cnt;
unsigned int spi_cnt;
unsigned long *spi_bitmap;
spinlock_t spi_lock;
struct resource *res;
struct device *dev;
};
static int gicp_idx_to_spi(struct mvebu_gicp *gicp, int idx)
{
int i;
for (i = 0; i < gicp->spi_ranges_cnt; i++) {
struct mvebu_gicp_spi_range *r = &gicp->spi_ranges[i];
if (idx < r->count)
return r->start + idx;
idx -= r->count;
}
return -EINVAL;
}
static void gicp_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
{
struct mvebu_gicp *gicp = data->chip_data;
phys_addr_t setspi = gicp->res->start + GICP_SETSPI_NSR_OFFSET;
phys_addr_t clrspi = gicp->res->start + GICP_CLRSPI_NSR_OFFSET;
msg[0].data = data->hwirq;
msg[0].address_lo = lower_32_bits(setspi);
msg[0].address_hi = upper_32_bits(setspi);
msg[1].data = data->hwirq;
msg[1].address_lo = lower_32_bits(clrspi);
msg[1].address_hi = upper_32_bits(clrspi);
}
static struct irq_chip gicp_irq_chip = {
.name = "GICP",
.irq_mask = irq_chip_mask_parent,
.irq_unmask = irq_chip_unmask_parent,
.irq_eoi = irq_chip_eoi_parent,
.irq_set_affinity = irq_chip_set_affinity_parent,
.irq_set_type = irq_chip_set_type_parent,
.irq_compose_msi_msg = gicp_compose_msi_msg,
};
static int gicp_irq_domain_alloc(struct irq_domain *domain, unsigned int virq,
unsigned int nr_irqs, void *args)
{
struct mvebu_gicp *gicp = domain->host_data;
struct irq_fwspec fwspec;
unsigned int hwirq;
int ret;
spin_lock(&gicp->spi_lock);
hwirq = find_first_zero_bit(gicp->spi_bitmap, gicp->spi_cnt);
if (hwirq == gicp->spi_cnt) {
spin_unlock(&gicp->spi_lock);
return -ENOSPC;
}
__set_bit(hwirq, gicp->spi_bitmap);
spin_unlock(&gicp->spi_lock);
fwspec.fwnode = domain->parent->fwnode;
fwspec.param_count = 3;
fwspec.param[0] = GIC_SPI;
fwspec.param[1] = gicp_idx_to_spi(gicp, hwirq) - 32;
/*
* Assume edge rising for now, it will be properly set when
* ->set_type() is called
*/
fwspec.param[2] = IRQ_TYPE_EDGE_RISING;
ret = irq_domain_alloc_irqs_parent(domain, virq, 1, &fwspec);
if (ret) {
dev_err(gicp->dev, "Cannot allocate parent IRQ\n");
goto free_hwirq;
}
ret = irq_domain_set_hwirq_and_chip(domain, virq, hwirq,
&gicp_irq_chip, gicp);
if (ret)
goto free_irqs_parent;
return 0;
free_irqs_parent:
irq_domain_free_irqs_parent(domain, virq, nr_irqs);
free_hwirq:
spin_lock(&gicp->spi_lock);
__clear_bit(hwirq, gicp->spi_bitmap);
spin_unlock(&gicp->spi_lock);
return ret;
}
static void gicp_irq_domain_free(struct irq_domain *domain,
unsigned int virq, unsigned int nr_irqs)
{
struct mvebu_gicp *gicp = domain->host_data;
struct irq_data *d = irq_domain_get_irq_data(domain, virq);
if (d->hwirq >= gicp->spi_cnt) {
dev_err(gicp->dev, "Invalid hwirq %lu\n", d->hwirq);
return;
}
irq_domain_free_irqs_parent(domain, virq, nr_irqs);
spin_lock(&gicp->spi_lock);
__clear_bit(d->hwirq, gicp->spi_bitmap);
spin_unlock(&gicp->spi_lock);
}
static const struct irq_domain_ops gicp_domain_ops = {
.alloc = gicp_irq_domain_alloc,
.free = gicp_irq_domain_free,
};
static struct irq_chip gicp_msi_irq_chip = {
.name = "GICP",
.irq_set_type = irq_chip_set_type_parent,
.flags = IRQCHIP_SUPPORTS_LEVEL_MSI,
};
static struct msi_domain_ops gicp_msi_ops = {
};
static struct msi_domain_info gicp_msi_domain_info = {
.flags = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
MSI_FLAG_LEVEL_CAPABLE),
.ops = &gicp_msi_ops,
.chip = &gicp_msi_irq_chip,
};
static int mvebu_gicp_probe(struct platform_device *pdev)
{
struct mvebu_gicp *gicp;
struct irq_domain *inner_domain, *plat_domain, *parent_domain;
struct device_node *node = pdev->dev.of_node;
struct device_node *irq_parent_dn;
int ret, i;
gicp = devm_kzalloc(&pdev->dev, sizeof(*gicp), GFP_KERNEL);
if (!gicp)
return -ENOMEM;
gicp->dev = &pdev->dev;
spin_lock_init(&gicp->spi_lock);
gicp->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!gicp->res)
return -ENODEV;
ret = of_property_count_u32_elems(node, "marvell,spi-ranges");
if (ret < 0)
return ret;
gicp->spi_ranges_cnt = ret / 2;
gicp->spi_ranges =
devm_kcalloc(&pdev->dev,
gicp->spi_ranges_cnt,
sizeof(struct mvebu_gicp_spi_range),
GFP_KERNEL);
if (!gicp->spi_ranges)
return -ENOMEM;
for (i = 0; i < gicp->spi_ranges_cnt; i++) {
of_property_read_u32_index(node, "marvell,spi-ranges",
i * 2,
&gicp->spi_ranges[i].start);
of_property_read_u32_index(node, "marvell,spi-ranges",
i * 2 + 1,
&gicp->spi_ranges[i].count);
gicp->spi_cnt += gicp->spi_ranges[i].count;
}
gicp->spi_bitmap = devm_kcalloc(&pdev->dev,
BITS_TO_LONGS(gicp->spi_cnt), sizeof(long),
GFP_KERNEL);
if (!gicp->spi_bitmap)
return -ENOMEM;
irq_parent_dn = of_irq_find_parent(node);
if (!irq_parent_dn) {
dev_err(&pdev->dev, "failed to find parent IRQ node\n");
return -ENODEV;
}
parent_domain = irq_find_host(irq_parent_dn);
if (!parent_domain) {
dev_err(&pdev->dev, "failed to find parent IRQ domain\n");
return -ENODEV;
}
inner_domain = irq_domain_create_hierarchy(parent_domain, 0,
gicp->spi_cnt,
of_node_to_fwnode(node),
&gicp_domain_ops, gicp);
if (!inner_domain)
return -ENOMEM;
plat_domain = platform_msi_create_irq_domain(of_node_to_fwnode(node),
&gicp_msi_domain_info,
inner_domain);
if (!plat_domain) {
irq_domain_remove(inner_domain);
return -ENOMEM;
}
platform_set_drvdata(pdev, gicp);
return 0;
}
static const struct of_device_id mvebu_gicp_of_match[] = {
{ .compatible = "marvell,ap806-gicp", },
{},
};
static struct platform_driver mvebu_gicp_driver = {
.probe = mvebu_gicp_probe,
.driver = {
.name = "mvebu-gicp",
.of_match_table = mvebu_gicp_of_match,
},
};
builtin_platform_driver(mvebu_gicp_driver);
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