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Date: Mon, 18 May 2009 15:50:50 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: Ingo Molnar <mingo@...e.hu>
Cc: Yinghai Lu <yinghai@...nel.org>, Jack Steiner <steiner@....com>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Thomas Gleixner <tglx@...utronix.de>,
"H. Peter Anvin" <hpa@...or.com>
Subject: Re: tip: patches in git for irq and numa
On Mon, 2009-05-18 at 09:29 +0200, Ingo Molnar wrote:
> * Yinghai Lu <yinghai@...nel.org> wrote:
>
> > irq related:
> > git://git.kernel.org/pub/scm/linux/kernel/git/yinghai/linux-2.6-yinghai.git irq
> > need to on top of tip/irq/numa
>
> ok, these were nicely structured. the pci_routeirq patch had a build
> bug for !CONFIG_PCI.
>
> ( I added an #ifdef for now, it might make sense to send a clean-up
> patch in the next merge window (not now) to factor out a
> pci_routeirq_enable() method that does all this cleanly. )
>
> Also, please add appropriate Cc: lines to the commit logs in the
> future, beyond the LKML-Reference tgs.
>
> > for memoryless node support:
> > git://git.kernel.org/pub/scm/linux/kernel/git/yinghai/linux-2.6-yinghai.git numa
> > and it is on top of tip/master
>
> small note: you could have based these on x86/mm btw. - that's where
> these patches go, typically.
>
> regarding subject lines:
>
> d03a6a4: mm: clear N_HIGH_MEMORY map before se set it again -v2
> 02ce039: x86: fix system without memory on node0 -v2
> 8c1aec8: x86: fix node_possible_map logic -v2
> 44a633c: x86: remove MEMORY_HOTPLUG_RESERVE related code -v2
>
> please never put '-v2' type of tags into the title of commits. In
> the title of patches they can be put here:
>
> [PATCH, v2] x86: fix system without memory on node0
>
> that saves maintainers a bit of typing work.
>
> Also, you included:
>
> d03a6a4: mm: clear N_HIGH_MEMORY map before se set it again -v2
>
> with no Acks from MM folks yet. So i skipped that one and will
> follow up about it.
The below seems to wreck my opteron, ata1 interrupts fail to get
through.
[ 6.951257] ata1.00: qc timeout (cmd 0x27)
[ 6.955354] ata1.00: failed to read native max address (err_mask=0x4)
[ 6.961781] ata1.00: HPA support seems broken, skipping HPA handling
[ 7.273044] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[ 7.285159] ata1.00: configured for UDMA/133
[ 7.290052] scsi 0:0:0:0: Direct-Access ATA WDC WD1200JS-00N 10.0 PQ: 0 ANSI: 5
[ 7.299294] sd 0:0:0:0: [sda] 234441648 512-byte hardware sectors: (120 GB/111 GiB)
[ 7.306968] sd 0:0:0:0: [sda] Write Protect is off
[ 7.311754] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
[ 7.316839] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 7.326312] sda:<6>ata2: SATA link down (SStatus 4 SControl 300)
[ 7.938372] ata3: SATA link down (SStatus 4 SControl 300)
[ 8.258372] ata4: SATA link down (SStatus 4 SControl 300)
[ 8.264357] scsi 4:0:0:0: CD-ROM TEAC DV-516G F4S7 PQ: 0 ANSI: 5
[ 37.704234] ata1: lost interrupt (Status 0x50)
[ 37.708695] sd 0:0:0:0: [sda] Unhandled error code
[ 37.713479] sd 0:0:0:0: [sda] Result: hostbyte=DID_OK driverbyte=DRIVER_TIMEOUT
[ 37.720791] end_request: I/O error, dev sda, sector 0
[ 37.725848] Buffer I/O error on device sda, logical block 0
---
commit b9c61b70075c87a8612624736faf4a2de5b1ed30
Author: Yinghai Lu <yinghai@...nel.org>
Date: Wed May 6 10:10:06 2009 -0700
x86/pci: update pirq_enable_irq() to setup io apic routing
So we can set io apic routing only when enabling the device irq.
This is advantageous for IRQ descriptor allocation affinity: if we set up
the IO-APIC entry later, we have a chance to allocate the IRQ descriptor
later and know which device it is on and can set affinity accordingly.
[ Impact: standardize/enhance irq-enabling sequence for mptable irqs ]
Signed-off-by: Yinghai Lu <yinghai@...nel.org>
Acked-by: Jesse Barnes <jbarnes@...tuousgeek.org>
Cc: Len Brown <lenb@...nel.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>
LKML-Reference: <4A01C46E.8000501@...nel.org>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 3a68dae..5d5f412 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -1480,9 +1480,13 @@ static void setup_IO_APIC_irq(int apic_id, int pin, unsigned int irq, struct irq
ioapic_write_entry(apic_id, pin, entry);
}
+static struct {
+ DECLARE_BITMAP(pin_programmed, MP_MAX_IOAPIC_PIN + 1);
+} mp_ioapic_routing[MAX_IO_APICS];
+
static void __init setup_IO_APIC_irqs(void)
{
- int apic_id, pin, idx, irq;
+ int apic_id = 0, pin, idx, irq;
int notcon = 0;
struct irq_desc *desc;
struct irq_cfg *cfg;
@@ -1490,48 +1494,53 @@ static void __init setup_IO_APIC_irqs(void)
apic_printk(APIC_VERBOSE, KERN_DEBUG "init IO_APIC IRQs\n");
- for (apic_id = 0; apic_id < nr_ioapics; apic_id++) {
- for (pin = 0; pin < nr_ioapic_registers[apic_id]; pin++) {
-
- idx = find_irq_entry(apic_id, pin, mp_INT);
- if (idx == -1) {
- if (!notcon) {
- notcon = 1;
- apic_printk(APIC_VERBOSE,
- KERN_DEBUG " %d-%d",
- mp_ioapics[apic_id].apicid, pin);
- } else
- apic_printk(APIC_VERBOSE, " %d-%d",
- mp_ioapics[apic_id].apicid, pin);
- continue;
- }
- if (notcon) {
- apic_printk(APIC_VERBOSE,
- " (apicid-pin) not connected\n");
- notcon = 0;
- }
+#ifdef CONFIG_ACPI
+ if (!acpi_disabled && acpi_ioapic) {
+ apic_id = mp_find_ioapic(0);
+ if (apic_id < 0)
+ apic_id = 0;
+ }
+#endif
- irq = pin_2_irq(idx, apic_id, pin);
+ for (pin = 0; pin < nr_ioapic_registers[apic_id]; pin++) {
+ idx = find_irq_entry(apic_id, pin, mp_INT);
+ if (idx == -1) {
+ if (!notcon) {
+ notcon = 1;
+ apic_printk(APIC_VERBOSE,
+ KERN_DEBUG " %d-%d",
+ mp_ioapics[apic_id].apicid, pin);
+ } else
+ apic_printk(APIC_VERBOSE, " %d-%d",
+ mp_ioapics[apic_id].apicid, pin);
+ continue;
+ }
+ if (notcon) {
+ apic_printk(APIC_VERBOSE,
+ " (apicid-pin) not connected\n");
+ notcon = 0;
+ }
- /*
- * Skip the timer IRQ if there's a quirk handler
- * installed and if it returns 1:
- */
- if (apic->multi_timer_check &&
- apic->multi_timer_check(apic_id, irq))
- continue;
+ irq = pin_2_irq(idx, apic_id, pin);
- desc = irq_to_desc_alloc_node(irq, node);
- if (!desc) {
- printk(KERN_INFO "can not get irq_desc for %d\n", irq);
- continue;
- }
- cfg = desc->chip_data;
- add_pin_to_irq_node(cfg, node, apic_id, pin);
+ /*
+ * Skip the timer IRQ if there's a quirk handler
+ * installed and if it returns 1:
+ */
+ if (apic->multi_timer_check &&
+ apic->multi_timer_check(apic_id, irq))
+ continue;
- setup_IO_APIC_irq(apic_id, pin, irq, desc,
- irq_trigger(idx), irq_polarity(idx));
+ desc = irq_to_desc_alloc_node(irq, node);
+ if (!desc) {
+ printk(KERN_INFO "can not get irq_desc for %d\n", irq);
+ continue;
}
+ cfg = desc->chip_data;
+ add_pin_to_irq_node(cfg, node, apic_id, pin);
+ set_bit(pin, mp_ioapic_routing[apic_id].pin_programmed);
+ setup_IO_APIC_irq(apic_id, pin, irq, desc,
+ irq_trigger(idx), irq_polarity(idx));
}
if (notcon)
@@ -3876,10 +3885,6 @@ static int __io_apic_set_pci_routing(struct device *dev, int ioapic, int pin, in
return 0;
}
-static struct {
- DECLARE_BITMAP(pin_programmed, MP_MAX_IOAPIC_PIN + 1);
-} mp_ioapic_routing[MAX_IO_APICS];
-
int io_apic_set_pci_routing(struct device *dev, int ioapic, int pin, int irq,
int triggering, int polarity)
{
@@ -4023,51 +4028,44 @@ int acpi_get_override_irq(int bus_irq, int *trigger, int *polarity)
#ifdef CONFIG_SMP
void __init setup_ioapic_dest(void)
{
- int pin, ioapic, irq, irq_entry;
+ int pin, ioapic = 0, irq, irq_entry;
struct irq_desc *desc;
- struct irq_cfg *cfg;
const struct cpumask *mask;
if (skip_ioapic_setup == 1)
return;
- for (ioapic = 0; ioapic < nr_ioapics; ioapic++) {
- for (pin = 0; pin < nr_ioapic_registers[ioapic]; pin++) {
- irq_entry = find_irq_entry(ioapic, pin, mp_INT);
- if (irq_entry == -1)
- continue;
- irq = pin_2_irq(irq_entry, ioapic, pin);
-
- /* setup_IO_APIC_irqs could fail to get vector for some device
- * when you have too many devices, because at that time only boot
- * cpu is online.
- */
- desc = irq_to_desc(irq);
- cfg = desc->chip_data;
- if (!cfg->vector) {
- setup_IO_APIC_irq(ioapic, pin, irq, desc,
- irq_trigger(irq_entry),
- irq_polarity(irq_entry));
- continue;
+#ifdef CONFIG_ACPI
+ if (!acpi_disabled && acpi_ioapic) {
+ ioapic = mp_find_ioapic(0);
+ if (ioapic < 0)
+ ioapic = 0;
+ }
+#endif
- }
+ for (pin = 0; pin < nr_ioapic_registers[ioapic]; pin++) {
+ irq_entry = find_irq_entry(ioapic, pin, mp_INT);
+ if (irq_entry == -1)
+ continue;
+ irq = pin_2_irq(irq_entry, ioapic, pin);
- /*
- * Honour affinities which have been set in early boot
- */
- if (desc->status &
- (IRQ_NO_BALANCING | IRQ_AFFINITY_SET))
- mask = desc->affinity;
- else
- mask = apic->target_cpus();
+ desc = irq_to_desc(irq);
- if (intr_remapping_enabled)
- set_ir_ioapic_affinity_irq_desc(desc, mask);
- else
- set_ioapic_affinity_irq_desc(desc, mask);
- }
+ /*
+ * Honour affinities which have been set in early boot
+ */
+ if (desc->status &
+ (IRQ_NO_BALANCING | IRQ_AFFINITY_SET))
+ mask = desc->affinity;
+ else
+ mask = apic->target_cpus();
+ if (intr_remapping_enabled)
+ set_ir_ioapic_affinity_irq_desc(desc, mask);
+ else
+ set_ioapic_affinity_irq_desc(desc, mask);
}
+
}
#endif
diff --git a/arch/x86/pci/irq.c b/arch/x86/pci/irq.c
index a2f6bde..2f3e192 100644
--- a/arch/x86/pci/irq.c
+++ b/arch/x86/pci/irq.c
@@ -889,6 +889,9 @@ static int pcibios_lookup_irq(struct pci_dev *dev, int assign)
return 0;
}
+ if (io_apic_assign_pci_irqs)
+ return 0;
+
/* Find IRQ routing entry */
if (!pirq_table)
@@ -1039,63 +1042,15 @@ static void __init pcibios_fixup_irqs(void)
pirq_penalty[dev->irq]++;
}
+ if (io_apic_assign_pci_irqs)
+ return;
+
dev = NULL;
while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
if (!pin)
continue;
-#ifdef CONFIG_X86_IO_APIC
- /*
- * Recalculate IRQ numbers if we use the I/O APIC.
- */
- if (io_apic_assign_pci_irqs) {
- int irq;
- int ioapic = -1, ioapic_pin = -1;
- int triggering, polarity;
-
- /*
- * interrupt pins are numbered starting from 1
- */
- irq = IO_APIC_get_PCI_irq_vector(dev->bus->number,
- PCI_SLOT(dev->devfn), pin - 1,
- &ioapic, &ioapic_pin,
- &triggering, &polarity);
- /*
- * Busses behind bridges are typically not listed in the
- * MP-table. In this case we have to look up the IRQ
- * based on the parent bus, parent slot, and pin number.
- * The SMP code detects such bridged busses itself so we
- * should get into this branch reliably.
- */
- if (irq < 0 && dev->bus->parent) {
- /* go back to the bridge */
- struct pci_dev *bridge = dev->bus->self;
- int bus;
-
- pin = pci_swizzle_interrupt_pin(dev, pin);
- bus = bridge->bus->number;
- irq = IO_APIC_get_PCI_irq_vector(bus,
- PCI_SLOT(bridge->devfn),
- pin - 1,
- &ioapic, &ioapic_pin,
- &triggering, &polarity);
- if (irq >= 0)
- dev_warn(&dev->dev,
- "using bridge %s INT %c to "
- "get IRQ %d\n",
- pci_name(bridge),
- 'A' + pin - 1, irq);
- }
- if (irq >= 0) {
- dev_info(&dev->dev,
- "PCI->APIC IRQ transform: INT %c "
- "-> IRQ %d\n",
- 'A' + pin - 1, irq);
- dev->irq = irq;
- }
- }
-#endif
/*
* Still no IRQ? Try to lookup one...
*/
@@ -1190,6 +1145,19 @@ int __init pcibios_irq_init(void)
pcibios_enable_irq = pirq_enable_irq;
pcibios_fixup_irqs();
+
+ if (io_apic_assign_pci_irqs && pci_routeirq) {
+ struct pci_dev *dev = NULL;
+ /*
+ * PCI IRQ routing is set up by pci_enable_device(), but we
+ * also do it here in case there are still broken drivers that
+ * don't use pci_enable_device().
+ */
+ printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n");
+ for_each_pci_dev(dev)
+ pirq_enable_irq(dev);
+ }
+
return 0;
}
@@ -1220,13 +1188,17 @@ void pcibios_penalize_isa_irq(int irq, int active)
static int pirq_enable_irq(struct pci_dev *dev)
{
u8 pin;
- struct pci_dev *temp_dev;
pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
- if (pin && !pcibios_lookup_irq(dev, 1) && !dev->irq) {
+ if (pin && !pcibios_lookup_irq(dev, 1)) {
char *msg = "";
+ if (!io_apic_assign_pci_irqs && dev->irq)
+ return 0;
+
if (io_apic_assign_pci_irqs) {
+#ifdef CONFIG_X86_IO_APIC
+ struct pci_dev *temp_dev;
int irq;
int ioapic = -1, ioapic_pin = -1;
int triggering, polarity;
@@ -1261,12 +1233,16 @@ static int pirq_enable_irq(struct pci_dev *dev)
}
dev = temp_dev;
if (irq >= 0) {
+ io_apic_set_pci_routing(&dev->dev, ioapic,
+ ioapic_pin, irq,
+ triggering, polarity);
+ dev->irq = irq;
dev_info(&dev->dev, "PCI->APIC IRQ transform: "
"INT %c -> IRQ %d\n", 'A' + pin - 1, irq);
- dev->irq = irq;
return 0;
} else
msg = "; probably buggy MP table";
+#endif
} else if (pci_probe & PCI_BIOS_IRQ_SCAN)
msg = "";
else
--
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