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x86, ioapic: Use proper defines for the entry fields 

While looking at the printout issue, I stumbled more than once over
the various 0/1 assignments which are either commented in strange ways
or force to lookup the meaning.

Use proper constants and fix the misleading comments. While at it
remove pointless 0 assignments in native_disable_io_apic() which have
no value for understanding the code.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Jiang 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>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: x86@kernel.org
Link: http://lkml.kernel.org/r/1428978610-28986-30-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner 2015-04-14 10:30:06 +08:00
parent 46176f39b1
commit 335efdf57d
2 changed files with 63 additions and 53 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
arch/x86/include/asm/io_apic.h
View File

@ -101,6 +101,16 @@ struct irq_data;
#define IOAPIC_AUTO -1 #define IOAPIC_AUTO -1
#define IOAPIC_EDGE 0 #define IOAPIC_EDGE 0
#define IOAPIC_LEVEL 1 #define IOAPIC_LEVEL 1
#define IOAPIC_MASKED 1
#define IOAPIC_UNMASKED 0
#define IOAPIC_POL_HIGH 0
#define IOAPIC_POL_LOW 1
#define IOAPIC_DEST_MODE_PHYSICAL 0
#define IOAPIC_DEST_MODE_LOGICAL 1
#define IOAPIC_MAP_ALLOC 0x1 #define IOAPIC_MAP_ALLOC 0x1
#define IOAPIC_MAP_CHECK 0x2 #define IOAPIC_MAP_CHECK 0x2

98
arch/x86/kernel/apic/io_apic.c
View File

@ -356,7 +356,7 @@ static void ioapic_write_entry(int apic, int pin, struct IO_APIC_route_entry e)
static void ioapic_mask_entry(int apic, int pin) static void ioapic_mask_entry(int apic, int pin)
{ {
unsigned long flags; unsigned long flags;
union entry_union eu = { .entry.mask = 1 }; union entry_union eu = { .entry.mask = IOAPIC_MASKED };
raw_spin_lock_irqsave(&ioapic_lock, flags); raw_spin_lock_irqsave(&ioapic_lock, flags);
io_apic_write(apic, 0x10 + 2*pin, eu.w1); io_apic_write(apic, 0x10 + 2*pin, eu.w1);
@ -517,7 +517,7 @@ static void __eoi_ioapic_pin(int apic, int pin, int vector)
/* /*
* Mask the entry and change the trigger mode to edge. * Mask the entry and change the trigger mode to edge.
*/ */
entry1.mask = 1; entry1.mask = IOAPIC_MASKED;
entry1.trigger = IOAPIC_EDGE; entry1.trigger = IOAPIC_EDGE;
__ioapic_write_entry(apic, pin, entry1); __ioapic_write_entry(apic, pin, entry1);
@ -553,8 +553,8 @@ static void clear_IO_APIC_pin(unsigned int apic, unsigned int pin)
* Make sure the entry is masked and re-read the contents to check * Make sure the entry is masked and re-read the contents to check
* if it is a level triggered pin and if the remote-IRR is set. * if it is a level triggered pin and if the remote-IRR is set.
*/ */
if (!entry.mask) { if (entry.mask == IOAPIC_UNMASKED) {
entry.mask = 1; entry.mask = IOAPIC_MASKED;
ioapic_write_entry(apic, pin, entry); ioapic_write_entry(apic, pin, entry);
entry = ioapic_read_entry(apic, pin); entry = ioapic_read_entry(apic, pin);
} }
@ -567,7 +567,7 @@ static void clear_IO_APIC_pin(unsigned int apic, unsigned int pin)
* doesn't clear the remote-IRR if the trigger mode is not * doesn't clear the remote-IRR if the trigger mode is not
* set to level. * set to level.
*/ */
if (!entry.trigger) { if (entry.trigger == IOAPIC_EDGE) {
entry.trigger = IOAPIC_LEVEL; entry.trigger = IOAPIC_LEVEL;
ioapic_write_entry(apic, pin, entry); ioapic_write_entry(apic, pin, entry);
} }
@ -670,8 +670,8 @@ void mask_ioapic_entries(void)
struct IO_APIC_route_entry entry; struct IO_APIC_route_entry entry;
entry = ioapics[apic].saved_registers[pin]; entry = ioapics[apic].saved_registers[pin];
if (!entry.mask) { if (entry.mask == IOAPIC_UNMASKED) {
entry.mask = 1; entry.mask = IOAPIC_MASKED;
ioapic_write_entry(apic, pin, entry); ioapic_write_entry(apic, pin, entry);
} }
} }
@ -773,11 +773,11 @@ static int EISA_ELCR(unsigned int irq)
#endif #endif
/* ISA interrupts are always polarity zero edge triggered, /* ISA interrupts are always active high edge triggered,
* when listed as conforming in the MP table. */ * when listed as conforming in the MP table. */
#define default_ISA_trigger(idx) (0) #define default_ISA_trigger(idx) (IOAPIC_EDGE)
#define default_ISA_polarity(idx) (0) #define default_ISA_polarity(idx) (IOAPIC_POL_HIGH)
/* EISA interrupts are always polarity zero and can be edge or level /* EISA interrupts are always polarity zero and can be edge or level
* trigger depending on the ELCR value. If an interrupt is listed as * trigger depending on the ELCR value. If an interrupt is listed as
@ -787,11 +787,11 @@ static int EISA_ELCR(unsigned int irq)
#define default_EISA_trigger(idx) (EISA_ELCR(mp_irqs[idx].srcbusirq)) #define default_EISA_trigger(idx) (EISA_ELCR(mp_irqs[idx].srcbusirq))
#define default_EISA_polarity(idx) default_ISA_polarity(idx) #define default_EISA_polarity(idx) default_ISA_polarity(idx)
/* PCI interrupts are always polarity one level triggered, /* PCI interrupts are always active low level triggered,
* when listed as conforming in the MP table. */ * when listed as conforming in the MP table. */
#define default_PCI_trigger(idx) (1) #define default_PCI_trigger(idx) (IOAPIC_LEVEL)
#define default_PCI_polarity(idx) (1) #define default_PCI_polarity(idx) (IOAPIC_POL_LOW)
static int irq_polarity(int idx) static int irq_polarity(int idx)
{ {
@ -811,24 +811,24 @@ static int irq_polarity(int idx)
break; break;
case 1: /* high active */ case 1: /* high active */
{ {
polarity = 0; polarity = IOAPIC_POL_HIGH;
break; break;
} }
case 2: /* reserved */ case 2: /* reserved */
{ {
pr_warn("broken BIOS!!\n"); pr_warn("broken BIOS!!\n");
polarity = 1; polarity = IOAPIC_POL_LOW;
break; break;
} }
case 3: /* low active */ case 3: /* low active */
{ {
polarity = 1; polarity = IOAPIC_POL_LOW;
break; break;
} }
default: /* invalid */ default: /* invalid */
{ {
pr_warn("broken BIOS!!\n"); pr_warn("broken BIOS!!\n");
polarity = 1; polarity = IOAPIC_POL_LOW;
break; break;
} }
} }
@ -870,7 +870,7 @@ static int irq_trigger(int idx)
default: default:
{ {
pr_warn("broken BIOS!!\n"); pr_warn("broken BIOS!!\n");
trigger = 1; trigger = IOAPIC_LEVEL;
break; break;
} }
} }
@ -878,24 +878,24 @@ static int irq_trigger(int idx)
break; break;
case 1: /* edge */ case 1: /* edge */
{ {
trigger = 0; trigger = IOAPIC_EDGE;
break; break;
} }
case 2: /* reserved */ case 2: /* reserved */
{ {
pr_warn("broken BIOS!!\n"); pr_warn("broken BIOS!!\n");
trigger = 1; trigger = IOAPIC_LEVEL;
break; break;
} }
case 3: /* level */ case 3: /* level */
{ {
trigger = 1; trigger = IOAPIC_LEVEL;
break; break;
} }
default: /* invalid */ default: /* invalid */
{ {
pr_warn("broken BIOS!!\n"); pr_warn("broken BIOS!!\n");
trigger = 0; trigger = IOAPIC_EDGE;
break; break;
} }
} }
@ -939,11 +939,11 @@ static void ioapic_copy_alloc_attr(struct irq_alloc_info *dst,
dst->ioapic_polarity = polarity; dst->ioapic_polarity = polarity;
} else { } else {
/* /*
* PCI interrupts are always polarity one level * PCI interrupts are always active low level
* triggered. * triggered.
*/ */
dst->ioapic_trigger = 1; dst->ioapic_trigger = IOAPIC_LEVEL;
dst->ioapic_polarity = 1; dst->ioapic_polarity = IOAPIC_POL_LOW;
} }
} }
} }
@ -1296,9 +1296,10 @@ static void io_apic_print_entries(unsigned int apic, unsigned int nr_entries)
entry = ioapic_read_entry(apic, i); entry = ioapic_read_entry(apic, i);
snprintf(buf, sizeof(buf), snprintf(buf, sizeof(buf),
" pin%02x, %s, %s, %s, V(%02X), IRR(%1d), S(%1d)", " pin%02x, %s, %s, %s, V(%02X), IRR(%1d), S(%1d)",
i, entry.mask ? "disabled" : "enabled ", i,
entry.trigger ? "level" : "edge ", entry.mask == IOAPIC_MASKED ? "disabled" : "enabled ",
entry.polarity ? "low " : "high", entry.trigger == IOAPIC_LEVEL ? "level" : "edge ",
entry.polarity == IOAPIC_POL_LOW ? "low " : "high",
entry.vector, entry.irr, entry.delivery_status); entry.vector, entry.irr, entry.delivery_status);
if (ir_entry->format) if (ir_entry->format)
printk(KERN_DEBUG "%s, remapped, I(%04X), Z(%X)\n", printk(KERN_DEBUG "%s, remapped, I(%04X), Z(%X)\n",
@ -1306,7 +1307,9 @@ static void io_apic_print_entries(unsigned int apic, unsigned int nr_entries)
ir_entry->zero); ir_entry->zero);
else else
printk(KERN_DEBUG "%s, %s, D(%02X), M(%1d)\n", printk(KERN_DEBUG "%s, %s, D(%02X), M(%1d)\n",
buf, entry.dest_mode ? "logical " : "physical", buf,
entry.dest_mode == IOAPIC_DEST_MODE_LOGICAL ?
"logical " : "physical",
entry.dest, entry.delivery_mode); entry.dest, entry.delivery_mode);
} }
} }
@ -1476,14 +1479,11 @@ void native_disable_io_apic(void)
struct IO_APIC_route_entry entry; struct IO_APIC_route_entry entry;
memset(&entry, 0, sizeof(entry)); memset(&entry, 0, sizeof(entry));
entry.mask = 0; /* Enabled */ entry.mask = IOAPIC_UNMASKED;
entry.trigger = 0; /* Edge */ entry.trigger = IOAPIC_EDGE;
entry.irr = 0; entry.polarity = IOAPIC_POL_HIGH;
entry.polarity = 0; /* High */ entry.dest_mode = IOAPIC_DEST_MODE_PHYSICAL;
entry.delivery_status = 0; entry.delivery_mode = dest_ExtINT;
entry.dest_mode = 0; /* Physical */
entry.delivery_mode = dest_ExtINT; /* ExtInt */
entry.vector = 0;
entry.dest = read_apic_id(); entry.dest = read_apic_id();
/* /*
@ -1494,7 +1494,6 @@ void native_disable_io_apic(void)
if (cpu_has_apic || apic_from_smp_config()) if (cpu_has_apic || apic_from_smp_config())
disconnect_bsp_APIC(ioapic_i8259.pin != -1); disconnect_bsp_APIC(ioapic_i8259.pin != -1);
} }
/* /*
@ -2018,12 +2017,12 @@ static inline void __init unlock_ExtINT_logic(void)
memset(&entry1, 0, sizeof(entry1)); memset(&entry1, 0, sizeof(entry1));
entry1.dest_mode = 0; /* physical delivery */ entry1.dest_mode = IOAPIC_DEST_MODE_PHYSICAL;
entry1.mask = 0; /* unmask IRQ now */ entry1.mask = IOAPIC_UNMASKED;
entry1.dest = hard_smp_processor_id(); entry1.dest = hard_smp_processor_id();
entry1.delivery_mode = dest_ExtINT; entry1.delivery_mode = dest_ExtINT;
entry1.polarity = entry0.polarity; entry1.polarity = entry0.polarity;
entry1.trigger = 0; entry1.trigger = IOAPIC_EDGE;
entry1.vector = 0; entry1.vector = 0;
ioapic_write_entry(apic, pin, entry1); ioapic_write_entry(apic, pin, entry1);
@ -2911,9 +2910,9 @@ static void mp_irqdomain_get_attr(u32 gsi, struct mp_chip_data *data,
data->polarity = info->ioapic_polarity; data->polarity = info->ioapic_polarity;
} else if (acpi_get_override_irq(gsi, &data->trigger, } else if (acpi_get_override_irq(gsi, &data->trigger,
&data->polarity) < 0) { &data->polarity) < 0) {
/* PCI interrupts are always polarity one level triggered. */ /* PCI interrupts are always active low level triggered. */
data->trigger = 1; data->trigger = IOAPIC_LEVEL;
data->polarity = 1; data->polarity = IOAPIC_POL_LOW;
} }
} }
@ -2925,15 +2924,16 @@ static void mp_setup_entry(struct irq_cfg *cfg, struct mp_chip_data *data,
entry->dest_mode = apic->irq_dest_mode; entry->dest_mode = apic->irq_dest_mode;
entry->dest = cfg->dest_apicid; entry->dest = cfg->dest_apicid;
entry->vector = cfg->vector; entry->vector = cfg->vector;
entry->mask = 0; /* enable IRQ */
entry->trigger = data->trigger; entry->trigger = data->trigger;
entry->polarity = data->polarity; entry->polarity = data->polarity;
/* /*
* Mask level triggered irqs. * Mask level triggered irqs. Edge triggered irqs are masked
* Use IRQ_DELAYED_DISABLE for edge triggered irqs. * by the irq core code in case they fire.
*/ */
if (data->trigger) if (data->trigger == IOAPIC_LEVEL)
entry->mask = 1; entry->mask = IOAPIC_MASKED;
else
entry->mask = IOAPIC_UNMASKED;
} }
int mp_irqdomain_alloc(struct irq_domain *domain, unsigned int virq, int mp_irqdomain_alloc(struct irq_domain *domain, unsigned int virq,