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[PATCH] PCI: Change MSI to use physical delivery mode always

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MSI hardcoded delivery mode to use logical delivery mode. Recently
x86_64 moved to use physical mode addressing to support physflat mode.
With this mode enabled noticed that my eth with MSI werent working.

msi_address_init()  was hardcoded to use logical mode for i386 and x86_64.
So when we switch to use physical mode, things stopped working.

Since anyway we dont use lowest priority delivery with MSI, its always
directed to just a single CPU. Its safe  and simpler to use
physical mode always, even when we use logical delivery mode for IPI's
or other ioapic RTE's.

Signed-off-by: Ashok Raj <ashok.raj@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Ashok Raj
2005-11-08 21:42:33 -08:00
committed by Greg Kroah-Hartman
parent 48b1914873
commit b4033c1715
6 changed files with 26 additions and 22 deletions
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20
drivers/pci/msi.c
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@@ -23,6 +23,8 @@
#include "pci.h"
#include "msi.h"
#define MSI_TARGET_CPU first_cpu(cpu_online_map)
static DEFINE_SPINLOCK(msi_lock);
static struct msi_desc* msi_desc[NR_IRQS] = { [0 ... NR_IRQS-1] = NULL };
static kmem_cache_t* msi_cachep;
@@ -92,6 +94,7 @@ static void set_msi_affinity(unsigned int vector, cpumask_t cpu_mask)
struct msi_desc *entry;
struct msg_address address;
unsigned int irq = vector;
unsigned int dest_cpu = first_cpu(cpu_mask);
entry = (struct msi_desc *)msi_desc[vector];
if (!entry || !entry->dev)
@@ -108,9 +111,9 @@ static void set_msi_affinity(unsigned int vector, cpumask_t cpu_mask)
pci_read_config_dword(entry->dev, msi_lower_address_reg(pos),
&address.lo_address.value);
address.lo_address.value &= MSI_ADDRESS_DEST_ID_MASK;
address.lo_address.value |= (cpu_mask_to_apicid(cpu_mask) <<
MSI_TARGET_CPU_SHIFT);
entry->msi_attrib.current_cpu = cpu_mask_to_apicid(cpu_mask);
address.lo_address.value |= (cpu_physical_id(dest_cpu) <<
MSI_TARGET_CPU_SHIFT);
entry->msi_attrib.current_cpu = cpu_physical_id(dest_cpu);
pci_write_config_dword(entry->dev, msi_lower_address_reg(pos),
address.lo_address.value);
set_native_irq_info(irq, cpu_mask);
@@ -123,9 +126,9 @@ static void set_msi_affinity(unsigned int vector, cpumask_t cpu_mask)
address.lo_address.value = readl(entry->mask_base + offset);
address.lo_address.value &= MSI_ADDRESS_DEST_ID_MASK;
address.lo_address.value |= (cpu_mask_to_apicid(cpu_mask) <<
MSI_TARGET_CPU_SHIFT);
entry->msi_attrib.current_cpu = cpu_mask_to_apicid(cpu_mask);
address.lo_address.value |= (cpu_physical_id(dest_cpu) <<
MSI_TARGET_CPU_SHIFT);
entry->msi_attrib.current_cpu = cpu_physical_id(dest_cpu);
writel(address.lo_address.value, entry->mask_base + offset);
set_native_irq_info(irq, cpu_mask);
break;
@@ -259,14 +262,15 @@ static void msi_data_init(struct msg_data *msi_data,
static void msi_address_init(struct msg_address *msi_address)
{
unsigned int dest_id;
unsigned long dest_phys_id = cpu_physical_id(MSI_TARGET_CPU);
memset(msi_address, 0, sizeof(struct msg_address));
msi_address->hi_address = (u32)0;
dest_id = (MSI_ADDRESS_HEADER << MSI_ADDRESS_HEADER_SHIFT);
msi_address->lo_address.u.dest_mode = MSI_DEST_MODE;
msi_address->lo_address.u.dest_mode = MSI_PHYSICAL_MODE;
msi_address->lo_address.u.redirection_hint = MSI_REDIRECTION_HINT_MODE;
msi_address->lo_address.u.dest_id = dest_id;
msi_address->lo_address.value |= (MSI_TARGET_CPU << MSI_TARGET_CPU_SHIFT);
msi_address->lo_address.value |= (dest_phys_id << MSI_TARGET_CPU_SHIFT);
}
static int msi_free_vector(struct pci_dev* dev, int vector, int reassign);