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-rw-r--r--drivers/irqchip/Kconfig9
-rw-r--r--drivers/irqchip/Makefile1
-rw-r--r--drivers/irqchip/irq-brcmstb-l2.c10
-rw-r--r--drivers/irqchip/irq-gic-v3-its.c28
-rw-r--r--drivers/irqchip/irq-i8259.c9
-rw-r--r--drivers/irqchip/irq-imx-irqsteer.c115
-rw-r--r--drivers/irqchip/irq-ls1x.c192
-rw-r--r--drivers/irqchip/irq-sifive-plic.c116
8 files changed, 387 insertions, 93 deletions
diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index 3d1e60779078..5dcb5456cd14 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -406,6 +406,15 @@ config IMX_IRQSTEER
help
Support for the i.MX IRQSTEER interrupt multiplexer/remapper.
+config LS1X_IRQ
+ bool "Loongson-1 Interrupt Controller"
+ depends on MACH_LOONGSON32
+ default y
+ select IRQ_DOMAIN
+ select GENERIC_IRQ_CHIP
+ help
+ Support for the Loongson-1 platform Interrupt Controller.
+
endmenu
config SIFIVE_PLIC
diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile
index c93713d24b86..7acd0e36d0b4 100644
--- a/drivers/irqchip/Makefile
+++ b/drivers/irqchip/Makefile
@@ -94,3 +94,4 @@ obj-$(CONFIG_CSKY_APB_INTC) += irq-csky-apb-intc.o
obj-$(CONFIG_SIFIVE_PLIC) += irq-sifive-plic.o
obj-$(CONFIG_IMX_IRQSTEER) += irq-imx-irqsteer.o
obj-$(CONFIG_MADERA_IRQ) += irq-madera.o
+obj-$(CONFIG_LS1X_IRQ) += irq-ls1x.o
diff --git a/drivers/irqchip/irq-brcmstb-l2.c b/drivers/irqchip/irq-brcmstb-l2.c
index 0e65f609352e..83364fedbf0a 100644
--- a/drivers/irqchip/irq-brcmstb-l2.c
+++ b/drivers/irqchip/irq-brcmstb-l2.c
@@ -129,8 +129,9 @@ static void brcmstb_l2_intc_suspend(struct irq_data *d)
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
struct irq_chip_type *ct = irq_data_get_chip_type(d);
struct brcmstb_l2_intc_data *b = gc->private;
+ unsigned long flags;
- irq_gc_lock(gc);
+ irq_gc_lock_irqsave(gc, flags);
/* Save the current mask */
b->saved_mask = irq_reg_readl(gc, ct->regs.mask);
@@ -139,7 +140,7 @@ static void brcmstb_l2_intc_suspend(struct irq_data *d)
irq_reg_writel(gc, ~gc->wake_active, ct->regs.disable);
irq_reg_writel(gc, gc->wake_active, ct->regs.enable);
}
- irq_gc_unlock(gc);
+ irq_gc_unlock_irqrestore(gc, flags);
}
static void brcmstb_l2_intc_resume(struct irq_data *d)
@@ -147,8 +148,9 @@ static void brcmstb_l2_intc_resume(struct irq_data *d)
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
struct irq_chip_type *ct = irq_data_get_chip_type(d);
struct brcmstb_l2_intc_data *b = gc->private;
+ unsigned long flags;
- irq_gc_lock(gc);
+ irq_gc_lock_irqsave(gc, flags);
if (ct->chip.irq_ack) {
/* Clear unmasked non-wakeup interrupts */
irq_reg_writel(gc, ~b->saved_mask & ~gc->wake_active,
@@ -158,7 +160,7 @@ static void brcmstb_l2_intc_resume(struct irq_data *d)
/* Restore the saved mask */
irq_reg_writel(gc, b->saved_mask, ct->regs.disable);
irq_reg_writel(gc, ~b->saved_mask, ct->regs.enable);
- irq_gc_unlock(gc);
+ irq_gc_unlock_irqrestore(gc, flags);
}
static int __init brcmstb_l2_intc_of_init(struct device_node *np,
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index 7f2a45445b00..666f5986b0ce 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -1737,6 +1737,7 @@ static int its_setup_baser(struct its_node *its, struct its_baser *baser,
u64 type = GITS_BASER_TYPE(val);
u64 baser_phys, tmp;
u32 alloc_pages;
+ struct page *page;
void *base;
retry_alloc_baser:
@@ -1749,10 +1750,11 @@ retry_alloc_baser:
order = get_order(GITS_BASER_PAGES_MAX * psz);
}
- base = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, order);
- if (!base)
+ page = alloc_pages_node(its->numa_node, GFP_KERNEL | __GFP_ZERO, order);
+ if (!page)
return -ENOMEM;
+ base = (void *)page_address(page);
baser_phys = virt_to_phys(base);
/* Check if the physical address of the memory is above 48bits */
@@ -1946,6 +1948,8 @@ static int its_alloc_tables(struct its_node *its)
indirect = its_parse_indirect_baser(its, baser,
psz, &order,
its->device_ids);
+ break;
+
case GITS_BASER_TYPE_VCPU:
indirect = its_parse_indirect_baser(its, baser,
psz, &order,
@@ -2236,7 +2240,8 @@ static struct its_baser *its_get_baser(struct its_node *its, u32 type)
return NULL;
}
-static bool its_alloc_table_entry(struct its_baser *baser, u32 id)
+static bool its_alloc_table_entry(struct its_node *its,
+ struct its_baser *baser, u32 id)
{
struct page *page;
u32 esz, idx;
@@ -2256,7 +2261,8 @@ static bool its_alloc_table_entry(struct its_baser *baser, u32 id)
/* Allocate memory for 2nd level table */
if (!table[idx]) {
- page = alloc_pages(GFP_KERNEL | __GFP_ZERO, get_order(baser->psz));
+ page = alloc_pages_node(its->numa_node, GFP_KERNEL | __GFP_ZERO,
+ get_order(baser->psz));
if (!page)
return false;
@@ -2287,7 +2293,7 @@ static bool its_alloc_device_table(struct its_node *its, u32 dev_id)
if (!baser)
return (ilog2(dev_id) < its->device_ids);
- return its_alloc_table_entry(baser, dev_id);
+ return its_alloc_table_entry(its, baser, dev_id);
}
static bool its_alloc_vpe_table(u32 vpe_id)
@@ -2311,7 +2317,7 @@ static bool its_alloc_vpe_table(u32 vpe_id)
if (!baser)
return false;
- if (!its_alloc_table_entry(baser, vpe_id))
+ if (!its_alloc_table_entry(its, baser, vpe_id))
return false;
}
@@ -2345,7 +2351,7 @@ static struct its_device *its_create_device(struct its_node *its, u32 dev_id,
nr_ites = max(2, nvecs);
sz = nr_ites * its->ite_size;
sz = max(sz, ITS_ITT_ALIGN) + ITS_ITT_ALIGN - 1;
- itt = kzalloc(sz, GFP_KERNEL);
+ itt = kzalloc_node(sz, GFP_KERNEL, its->numa_node);
if (alloc_lpis) {
lpi_map = its_lpi_alloc(nvecs, &lpi_base, &nr_lpis);
if (lpi_map)
@@ -3487,6 +3493,7 @@ static int __init its_probe_one(struct resource *res,
void __iomem *its_base;
u32 val, ctlr;
u64 baser, tmp, typer;
+ struct page *page;
int err;
its_base = ioremap(res->start, resource_size(res));
@@ -3542,12 +3549,13 @@ static int __init its_probe_one(struct resource *res,
its->numa_node = numa_node;
- its->cmd_base = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
- get_order(ITS_CMD_QUEUE_SZ));
- if (!its->cmd_base) {
+ page = alloc_pages_node(its->numa_node, GFP_KERNEL | __GFP_ZERO,
+ get_order(ITS_CMD_QUEUE_SZ));
+ if (!page) {
err = -ENOMEM;
goto out_free_its;
}
+ its->cmd_base = (void *)page_address(page);
its->cmd_write = its->cmd_base;
its->fwnode_handle = handle;
its->get_msi_base = its_irq_get_msi_base;
diff --git a/drivers/irqchip/irq-i8259.c b/drivers/irqchip/irq-i8259.c
index b0d4aab1a58c..d000870d9b6b 100644
--- a/drivers/irqchip/irq-i8259.c
+++ b/drivers/irqchip/irq-i8259.c
@@ -225,14 +225,6 @@ static struct syscore_ops i8259_syscore_ops = {
.shutdown = i8259A_shutdown,
};
-static int __init i8259A_init_sysfs(void)
-{
- register_syscore_ops(&i8259_syscore_ops);
- return 0;
-}
-
-device_initcall(i8259A_init_sysfs);
-
static void init_8259A(int auto_eoi)
{
unsigned long flags;
@@ -332,6 +324,7 @@ struct irq_domain * __init __init_i8259_irqs(struct device_node *node)
panic("Failed to add i8259 IRQ domain");
setup_irq(I8259A_IRQ_BASE + PIC_CASCADE_IR, &irq2);
+ register_syscore_ops(&i8259_syscore_ops);
return domain;
}
diff --git a/drivers/irqchip/irq-imx-irqsteer.c b/drivers/irqchip/irq-imx-irqsteer.c
index 5b3f1d735685..d1098f4da6a4 100644
--- a/drivers/irqchip/irq-imx-irqsteer.c
+++ b/drivers/irqchip/irq-imx-irqsteer.c
@@ -10,10 +10,11 @@
#include <linux/irqchip/chained_irq.h>
#include <linux/irqdomain.h>
#include <linux/kernel.h>
+#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/spinlock.h>
-#define CTRL_STRIDE_OFF(_t, _r) (_t * 8 * _r)
+#define CTRL_STRIDE_OFF(_t, _r) (_t * 4 * _r)
#define CHANCTRL 0x0
#define CHANMASK(n, t) (CTRL_STRIDE_OFF(t, 0) + 0x4 * (n) + 0x4)
#define CHANSET(n, t) (CTRL_STRIDE_OFF(t, 1) + 0x4 * (n) + 0x4)
@@ -21,12 +22,15 @@
#define CHAN_MINTDIS(t) (CTRL_STRIDE_OFF(t, 3) + 0x4)
#define CHAN_MASTRSTAT(t) (CTRL_STRIDE_OFF(t, 3) + 0x8)
+#define CHAN_MAX_OUTPUT_INT 0x8
+
struct irqsteer_data {
void __iomem *regs;
struct clk *ipg_clk;
- int irq;
+ int irq[CHAN_MAX_OUTPUT_INT];
+ int irq_count;
raw_spinlock_t lock;
- int irq_groups;
+ int reg_num;
int channel;
struct irq_domain *domain;
u32 *saved_reg;
@@ -35,7 +39,7 @@ struct irqsteer_data {
static int imx_irqsteer_get_reg_index(struct irqsteer_data *data,
unsigned long irqnum)
{
- return (data->irq_groups * 2 - irqnum / 32 - 1);
+ return (data->reg_num - irqnum / 32 - 1);
}
static void imx_irqsteer_irq_unmask(struct irq_data *d)
@@ -46,9 +50,9 @@ static void imx_irqsteer_irq_unmask(struct irq_data *d)
u32 val;
raw_spin_lock_irqsave(&data->lock, flags);
- val = readl_relaxed(data->regs + CHANMASK(idx, data->irq_groups));
+ val = readl_relaxed(data->regs + CHANMASK(idx, data->reg_num));
val |= BIT(d->hwirq % 32);
- writel_relaxed(val, data->regs + CHANMASK(idx, data->irq_groups));
+ writel_relaxed(val, data->regs + CHANMASK(idx, data->reg_num));
raw_spin_unlock_irqrestore(&data->lock, flags);
}
@@ -60,9 +64,9 @@ static void imx_irqsteer_irq_mask(struct irq_data *d)
u32 val;
raw_spin_lock_irqsave(&data->lock, flags);
- val = readl_relaxed(data->regs + CHANMASK(idx, data->irq_groups));
+ val = readl_relaxed(data->regs + CHANMASK(idx, data->reg_num));
val &= ~BIT(d->hwirq % 32);
- writel_relaxed(val, data->regs + CHANMASK(idx, data->irq_groups));
+ writel_relaxed(val, data->regs + CHANMASK(idx, data->reg_num));
raw_spin_unlock_irqrestore(&data->lock, flags);
}
@@ -87,23 +91,47 @@ static const struct irq_domain_ops imx_irqsteer_domain_ops = {
.xlate = irq_domain_xlate_onecell,
};
+static int imx_irqsteer_get_hwirq_base(struct irqsteer_data *data, u32 irq)
+{
+ int i;
+
+ for (i = 0; i < data->irq_count; i++) {
+ if (data->irq[i] == irq)
+ return i * 64;
+ }
+
+ return -EINVAL;
+}
+
static void imx_irqsteer_irq_handler(struct irq_desc *desc)
{
struct irqsteer_data *data = irq_desc_get_handler_data(desc);
- int i;
+ int hwirq;
+ int irq, i;
chained_irq_enter(irq_desc_get_chip(desc), desc);
- for (i = 0; i < data->irq_groups * 64; i += 32) {
- int idx = imx_irqsteer_get_reg_index(data, i);
+ irq = irq_desc_get_irq(desc);
+ hwirq = imx_irqsteer_get_hwirq_base(data, irq);
+ if (hwirq < 0) {
+ pr_warn("%s: unable to get hwirq base for irq %d\n",
+ __func__, irq);
+ return;
+ }
+
+ for (i = 0; i < 2; i++, hwirq += 32) {
+ int idx = imx_irqsteer_get_reg_index(data, hwirq);
unsigned long irqmap;
int pos, virq;
+ if (hwirq >= data->reg_num * 32)
+ break;
+
irqmap = readl_relaxed(data->regs +
- CHANSTATUS(idx, data->irq_groups));
+ CHANSTATUS(idx, data->reg_num));
for_each_set_bit(pos, &irqmap, 32) {
- virq = irq_find_mapping(data->domain, pos + i);
+ virq = irq_find_mapping(data->domain, pos + hwirq);
if (virq)
generic_handle_irq(virq);
}
@@ -117,7 +145,8 @@ static int imx_irqsteer_probe(struct platform_device *pdev)
struct device_node *np = pdev->dev.of_node;
struct irqsteer_data *data;
struct resource *res;
- int ret;
+ u32 irqs_num;
+ int i, ret;
data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
if (!data)
@@ -130,12 +159,6 @@ static int imx_irqsteer_probe(struct platform_device *pdev)
return PTR_ERR(data->regs);
}
- data->irq = platform_get_irq(pdev, 0);
- if (data->irq <= 0) {
- dev_err(&pdev->dev, "failed to get irq\n");
- return -ENODEV;
- }
-
data->ipg_clk = devm_clk_get(&pdev->dev, "ipg");
if (IS_ERR(data->ipg_clk)) {
ret = PTR_ERR(data->ipg_clk);
@@ -146,12 +169,19 @@ static int imx_irqsteer_probe(struct platform_device *pdev)
raw_spin_lock_init(&data->lock);
- of_property_read_u32(np, "fsl,irq-groups", &data->irq_groups);
+ of_property_read_u32(np, "fsl,num-irqs", &irqs_num);
of_property_read_u32(np, "fsl,channel", &data->channel);
+ /*
+ * There is one output irq for each group of 64 inputs.
+ * One register bit map can represent 32 input interrupts.
+ */
+ data->irq_count = DIV_ROUND_UP(irqs_num, 64);
+ data->reg_num = irqs_num / 32;
+
if (IS_ENABLED(CONFIG_PM_SLEEP)) {
data->saved_reg = devm_kzalloc(&pdev->dev,
- sizeof(u32) * data->irq_groups * 2,
+ sizeof(u32) * data->reg_num,
GFP_KERNEL);
if (!data->saved_reg)
return -ENOMEM;
@@ -166,27 +196,48 @@ static int imx_irqsteer_probe(struct platform_device *pdev)
/* steer all IRQs into configured channel */
writel_relaxed(BIT(data->channel), data->regs + CHANCTRL);
- data->domain = irq_domain_add_linear(np, data->irq_groups * 64,
+ data->domain = irq_domain_add_linear(np, data->reg_num * 32,
&imx_irqsteer_domain_ops, data);
if (!data->domain) {
dev_err(&pdev->dev, "failed to create IRQ domain\n");
- clk_disable_unprepare(data->ipg_clk);
- return -ENOMEM;
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ if (!data->irq_count || data->irq_count > CHAN_MAX_OUTPUT_INT) {
+ ret = -EINVAL;
+ goto out;
}
- irq_set_chained_handler_and_data(data->irq, imx_irqsteer_irq_handler,
- data);
+ for (i = 0; i < data->irq_count; i++) {
+ data->irq[i] = irq_of_parse_and_map(np, i);
+ if (!data->irq[i]) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ irq_set_chained_handler_and_data(data->irq[i],
+ imx_irqsteer_irq_handler,
+ data);
+ }
platform_set_drvdata(pdev, data);
return 0;
+out:
+ clk_disable_unprepare(data->ipg_clk);
+ return ret;
}
static int imx_irqsteer_remove(struct platform_device *pdev)
{
struct irqsteer_data *irqsteer_data = platform_get_drvdata(pdev);
+ int i;
+
+ for (i = 0; i < irqsteer_data->irq_count; i++)
+ irq_set_chained_handler_and_data(irqsteer_data->irq[i],
+ NULL, NULL);
- irq_set_chained_handler_and_data(irqsteer_data->irq, NULL, NULL);
irq_domain_remove(irqsteer_data->domain);
clk_disable_unprepare(irqsteer_data->ipg_clk);
@@ -199,9 +250,9 @@ static void imx_irqsteer_save_regs(struct irqsteer_data *data)
{
int i;
- for (i = 0; i < data->irq_groups * 2; i++)
+ for (i = 0; i < data->reg_num; i++)
data->saved_reg[i] = readl_relaxed(data->regs +
- CHANMASK(i, data->irq_groups));
+ CHANMASK(i, data->reg_num));
}
static void imx_irqsteer_restore_regs(struct irqsteer_data *data)
@@ -209,9 +260,9 @@ static void imx_irqsteer_restore_regs(struct irqsteer_data *data)
int i;
writel_relaxed(BIT(data->channel), data->regs + CHANCTRL);
- for (i = 0; i < data->irq_groups * 2; i++)
+ for (i = 0; i < data->reg_num; i++)
writel_relaxed(data->saved_reg[i],
- data->regs + CHANMASK(i, data->irq_groups));
+ data->regs + CHANMASK(i, data->reg_num));
}
static int imx_irqsteer_suspend(struct device *dev)
diff --git a/drivers/irqchip/irq-ls1x.c b/drivers/irqchip/irq-ls1x.c
new file mode 100644
index 000000000000..86b72fbd3b45
--- /dev/null
+++ b/drivers/irqchip/irq-ls1x.c
@@ -0,0 +1,192 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2019, Jiaxun Yang <jiaxun.yang@flygoat.com>
+ * Loongson-1 platform IRQ support
+ */
+
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/irqchip.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/io.h>
+#include <linux/irqchip/chained_irq.h>
+
+#define LS_REG_INTC_STATUS 0x00
+#define LS_REG_INTC_EN 0x04
+#define LS_REG_INTC_SET 0x08
+#define LS_REG_INTC_CLR 0x0c
+#define LS_REG_INTC_POL 0x10
+#define LS_REG_INTC_EDGE 0x14
+
+/**
+ * struct ls1x_intc_priv - private ls1x-intc data.
+ * @domain: IRQ domain.
+ * @intc_base: IO Base of intc registers.
+ */
+
+struct ls1x_intc_priv {
+ struct irq_domain *domain;
+ void __iomem *intc_base;
+};
+
+
+static void ls1x_chained_handle_irq(struct irq_desc *desc)
+{
+ struct ls1x_intc_priv *priv = irq_desc_get_handler_data(desc);
+ struct irq_chip *chip = irq_desc_get_chip(desc);
+ u32 pending;
+
+ chained_irq_enter(chip, desc);
+ pending = readl(priv->intc_base + LS_REG_INTC_STATUS) &
+ readl(priv->intc_base + LS_REG_INTC_EN);
+
+ if (!pending)
+ spurious_interrupt();
+
+ while (pending) {
+ int bit = __ffs(pending);
+
+ generic_handle_irq(irq_find_mapping(priv->domain, bit));
+ pending &= ~BIT(bit);
+ }
+
+ chained_irq_exit(chip, desc);
+}
+
+static void ls_intc_set_bit(struct irq_chip_generic *gc,
+ unsigned int offset,
+ u32 mask, bool set)
+{
+ if (set)
+ writel(readl(gc->reg_base + offset) | mask,
+ gc->reg_base + offset);
+ else
+ writel(readl(gc->reg_base + offset) & ~mask,
+ gc->reg_base + offset);
+}
+
+static int ls_intc_set_type(struct irq_data *data, unsigned int type)
+{
+ struct irq_chip_generic *gc = irq_data_get_irq_chip_data(data);
+ u32 mask = data->mask;
+
+ switch (type) {
+ case IRQ_TYPE_LEVEL_HIGH:
+ ls_intc_set_bit(gc, LS_REG_INTC_EDGE, mask, false);
+ ls_intc_set_bit(gc, LS_REG_INTC_POL, mask, true);
+ break;
+ case IRQ_TYPE_LEVEL_LOW:
+ ls_intc_set_bit(gc, LS_REG_INTC_EDGE, mask, false);
+ ls_intc_set_bit(gc, LS_REG_INTC_POL, mask, false);
+ break;
+ case IRQ_TYPE_EDGE_RISING:
+ ls_intc_set_bit(gc, LS_REG_INTC_EDGE, mask, true);
+ ls_intc_set_bit(gc, LS_REG_INTC_POL, mask, true);
+ break;
+ case IRQ_TYPE_EDGE_FALLING:
+ ls_intc_set_bit(gc, LS_REG_INTC_EDGE, mask, true);
+ ls_intc_set_bit(gc, LS_REG_INTC_POL, mask, false);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ irqd_set_trigger_type(data, type);
+ return irq_setup_alt_chip(data, type);
+}
+
+
+static int __init ls1x_intc_of_init(struct device_node *node,
+ struct device_node *parent)
+{
+ struct irq_chip_generic *gc;
+ struct irq_chip_type *ct;
+ struct ls1x_intc_priv *priv;
+ int parent_irq, err = 0;
+
+ priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->intc_base = of_iomap(node, 0);
+ if (!priv->intc_base) {
+ err = -ENODEV;
+ goto out_free_priv;
+ }
+
+ parent_irq = irq_of_parse_and_map(node, 0);
+ if (!parent_irq) {
+ pr_err("ls1x-irq: unable to get parent irq\n");
+ err = -ENODEV;
+ goto out_iounmap;
+ }
+
+ /* Set up an IRQ domain */
+ priv->domain = irq_domain_add_linear(node, 32, &irq_generic_chip_ops,
+ NULL);
+ if (!priv->domain) {
+ pr_err("ls1x-irq: cannot add IRQ domain\n");
+ goto out_iounmap;
+ }
+
+ err = irq_alloc_domain_generic_chips(priv->domain, 32, 2,
+ node->full_name, handle_level_irq,
+ IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN, 0,
+ IRQ_GC_INIT_MASK_CACHE);
+ if (err) {
+ pr_err("ls1x-irq: unable to register IRQ domain\n");
+ goto out_free_domain;
+ }
+
+ /* Mask all irqs */
+ writel(0x0, priv->intc_base + LS_REG_INTC_EN);
+
+ /* Ack all irqs */
+ writel(0xffffffff, priv->intc_base + LS_REG_INTC_CLR);
+
+ /* Set all irqs to high level triggered */
+ writel(0xffffffff, priv->intc_base + LS_REG_INTC_POL);
+
+ gc = irq_get_domain_generic_chip(priv->domain, 0);
+
+ gc->reg_base = priv->intc_base;
+
+ ct = gc->chip_types;
+ ct[0].type = IRQ_TYPE_LEVEL_MASK;
+ ct[0].regs.mask = LS_REG_INTC_EN;
+ ct[0].regs.ack = LS_REG_INTC_CLR;
+ ct[0].chip.irq_unmask = irq_gc_mask_set_bit;
+ ct[0].chip.irq_mask = irq_gc_mask_clr_bit;
+ ct[0].chip.irq_ack = irq_gc_ack_set_bit;
+ ct[0].chip.irq_set_type = ls_intc_set_type;
+ ct[0].handler = handle_level_irq;
+
+ ct[1].type = IRQ_TYPE_EDGE_BOTH;
+ ct[1].regs.mask = LS_REG_INTC_EN;
+ ct[1].regs.ack = LS_REG_INTC_CLR;
+ ct[1].chip.irq_unmask = irq_gc_mask_set_bit;
+ ct[1].chip.irq_mask = irq_gc_mask_clr_bit;
+ ct[1].chip.irq_ack = irq_gc_ack_set_bit;
+ ct[1].chip.irq_set_type = ls_intc_set_type;
+ ct[1].handler = handle_edge_irq;
+
+ irq_set_chained_handler_and_data(parent_irq,
+ ls1x_chained_handle_irq, priv);
+
+ return 0;
+
+out_free_domain:
+ irq_domain_remove(priv->domain);
+out_iounmap:
+ iounmap(priv->intc_base);
+out_free_priv:
+ kfree(priv);
+
+ return err;
+}
+
+IRQCHIP_DECLARE(ls1x_intc, "loongson,ls1x-intc", ls1x_intc_of_init);
diff --git a/drivers/irqchip/irq-sifive-plic.c b/drivers/irqchip/irq-sifive-plic.c
index 357e9daf94ae..cf755964f2f8 100644
--- a/drivers/irqchip/irq-sifive-plic.c
+++ b/drivers/irqchip/irq-sifive-plic.c
@@ -59,62 +59,83 @@ static void __iomem *plic_regs;
struct plic_handler {
bool present;
- int ctxid;
+ void __iomem *hart_base;
+ /*
+ * Protect mask operations on the registers given that we can't
+ * assume atomic memory operations work on them.
+ */
+ raw_spinlock_t enable_lock;
+ void __iomem *enable_base;
};
static DEFINE_PER_CPU(struct plic_handler, plic_handlers);
-static inline void __iomem *plic_hart_offset(int ctxid)
-{
- return plic_regs + CONTEXT_BASE + ctxid * CONTEXT_PER_HART;
-}
-
-static inline u32 __iomem *plic_enable_base(int ctxid)
-{
- return plic_regs + ENABLE_BASE + ctxid * ENABLE_PER_HART;
-}
-
-/*
- * Protect mask operations on the registers given that we can't assume that
- * atomic memory operations work on them.
- */
-static DEFINE_RAW_SPINLOCK(plic_toggle_lock);
-
-static inline void plic_toggle(int ctxid, int hwirq, int enable)
+static inline void plic_toggle(struct plic_handler *handler,
+ int hwirq, int enable)
{
- u32 __iomem *reg = plic_enable_base(ctxid) + (hwirq / 32);
+ u32 __iomem *reg = handler->enable_base + (hwirq / 32) * sizeof(u32);
u32 hwirq_mask = 1 << (hwirq % 32);
- raw_spin_lock(&plic_toggle_lock);
+ raw_spin_lock(&handler->enable_lock);
if (enable)
writel(readl(reg) | hwirq_mask, reg);
else
writel(readl(reg) & ~hwirq_mask, reg);
- raw_spin_unlock(&plic_toggle_lock);
+ raw_spin_unlock(&handler->enable_lock);
}
-static inline void plic_irq_toggle(struct irq_data *d, int enable)
+static inline void plic_irq_toggle(const struct cpumask *mask,
+ int hwirq, int enable)
{
int cpu;
- writel(enable, plic_regs + PRIORITY_BASE + d->hwirq * PRIORITY_PER_ID);
- for_each_cpu(cpu, irq_data_get_affinity_mask(d)) {
+ writel(enable, plic_regs + PRIORITY_BASE + hwirq * PRIORITY_PER_ID);
+ for_each_cpu(cpu, mask) {
struct plic_handler *handler = per_cpu_ptr(&plic_handlers, cpu);
if (handler->present)
- plic_toggle(handler->ctxid, d->hwirq, enable);
+ plic_toggle(handler, hwirq, enable);
}
}
static void plic_irq_enable(struct irq_data *d)
{
- plic_irq_toggle(d, 1);
+ unsigned int cpu = cpumask_any_and(irq_data_get_affinity_mask(d),
+ cpu_online_mask);
+ if (WARN_ON_ONCE(cpu >= nr_cpu_ids))
+ return;
+ plic_irq_toggle(cpumask_of(cpu), d->hwirq, 1);
}
static void plic_irq_disable(struct irq_data *d)
{
- plic_irq_toggle(d, 0);
+ plic_irq_toggle(cpu_possible_mask, d->hwirq, 0);
}
+#ifdef CONFIG_SMP
+static int plic_set_affinity(struct irq_data *d,
+ const struct cpumask *mask_val, bool force)
+{
+ unsigned int cpu;
+
+ if (force)
+ cpu = cpumask_first(mask_val);
+ else
+ cpu = cpumask_any_and(mask_val, cpu_online_mask);
+
+ if (cpu >= nr_cpu_ids)
+ return -EINVAL;
+
+ if (!irqd_irq_disabled(d)) {
+ plic_irq_toggle(cpu_possible_mask, d->hwirq, 0);
+ plic_irq_toggle(cpumask_of(cpu), d->hwirq, 1);
+ }
+
+ irq_data_update_effective_affinity(d, cpumask_of(cpu));
+
+ return IRQ_SET_MASK_OK_DONE;
+}
+#endif
+
static struct irq_chip plic_chip = {
.name = "SiFive PLIC",
/*
@@ -123,6 +144,9 @@ static struct irq_chip plic_chip = {
*/
.irq_enable = plic_irq_enable,
.irq_disable = plic_irq_disable,
+#ifdef CONFIG_SMP
+ .irq_set_affinity = plic_set_affinity,
+#endif
};
static int plic_irqdomain_map(struct irq_domain *d, unsigned int irq,
@@ -150,7 +174,7 @@ static struct irq_domain *plic_irqdomain;
static void plic_handle_irq(struct pt_regs *regs)
{
struct plic_handler *handler = this_cpu_ptr(&plic_handlers);
- void __iomem *claim = plic_hart_offset(handler->ctxid) + CONTEXT_CLAIM;
+ void __iomem *claim = handler->hart_base + CONTEXT_CLAIM;
irq_hw_number_t hwirq;
WARN_ON_ONCE(!handler->present);
@@ -186,7 +210,7 @@ static int plic_find_hart_id(struct device_node *node)
static int __init plic_init(struct device_node *node,
struct device_node *parent)
{
- int error = 0, nr_handlers, nr_mapped = 0, i;
+ int error = 0, nr_contexts, nr_handlers = 0, i;
u32 nr_irqs;
if (plic_regs) {
@@ -203,10 +227,10 @@ static int __init plic_init(struct device_node *node,
if (WARN_ON(!nr_irqs))
goto out_iounmap;
- nr_handlers = of_irq_count(node);
- if (WARN_ON(!nr_handlers))
+ nr_contexts = of_irq_count(node);
+ if (WARN_ON(!nr_contexts))
goto out_iounmap;
- if (WARN_ON(nr_handlers < num_possible_cpus()))
+ if (WARN_ON(nr_contexts < num_possible_cpus()))
goto out_iounmap;
error = -ENOMEM;
@@ -215,7 +239,7 @@ static int __init plic_init(struct device_node *node,
if (WARN_ON(!plic_irqdomain))
goto out_iounmap;
- for (i = 0; i < nr_handlers; i++) {
+ for (i = 0; i < nr_contexts; i++) {
struct of_phandle_args parent;
struct plic_handler *handler;
irq_hw_number_t hwirq;
@@ -237,19 +261,33 @@ static int __init plic_init(struct device_node *node,
}
cpu = riscv_hartid_to_cpuid(hartid);
+ if (cpu < 0) {
+ pr_warn("Invalid cpuid for context %d\n", i);
+ continue;
+ }
+
handler = per_cpu_ptr(&plic_handlers, cpu);
+ if (handler->present) {
+ pr_warn("handler already present for context %d.\n", i);
+ continue;
+ }
+
handler->present = true;
- handler->ctxid = i;
+ handler->hart_base =
+ plic_regs + CONTEXT_BASE + i * CONTEXT_PER_HART;
+ raw_spin_lock_init(&handler->enable_lock);
+ handler->enable_base =
+ plic_regs + ENABLE_BASE + i * ENABLE_PER_HART;
/* priority must be > threshold to trigger an interrupt */
- writel(0, plic_hart_offset(i) + CONTEXT_THRESHOLD);
+ writel(0, handler->hart_base + CONTEXT_THRESHOLD);
for (hwirq = 1; hwirq <= nr_irqs; hwirq++)
- plic_toggle(i, hwirq, 0);
- nr_mapped++;
+ plic_toggle(handler, hwirq, 0);
+ nr_handlers++;
}
- pr_info("mapped %d interrupts to %d (out of %d) handlers.\n",
- nr_irqs, nr_mapped, nr_handlers);
+ pr_info("mapped %d interrupts with %d handlers for %d contexts.\n",
+ nr_irqs, nr_handlers, nr_contexts);
set_handle_irq(plic_handle_irq);
return 0;
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-12-11 08:43:03 +0000