forked from luck/tmp_suning_uos_patched
8a3a0ee736
The following 'if' statement in ia64_setup_msi_irq() always fails even
if create_irq() returns <0 value, because variable 'irq' is defined as
unsigned int. It would cause invalid memory access.
irq = create_irq();
if (irq < 0)
return irq;
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
149 lines
3.3 KiB
C
149 lines
3.3 KiB
C
/*
|
|
* MSI hooks for standard x86 apic
|
|
*/
|
|
|
|
#include <linux/pci.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/msi.h>
|
|
#include <asm/smp.h>
|
|
|
|
/*
|
|
* Shifts for APIC-based data
|
|
*/
|
|
|
|
#define MSI_DATA_VECTOR_SHIFT 0
|
|
#define MSI_DATA_VECTOR(v) (((u8)v) << MSI_DATA_VECTOR_SHIFT)
|
|
|
|
#define MSI_DATA_DELIVERY_SHIFT 8
|
|
#define MSI_DATA_DELIVERY_FIXED (0 << MSI_DATA_DELIVERY_SHIFT)
|
|
#define MSI_DATA_DELIVERY_LOWPRI (1 << MSI_DATA_DELIVERY_SHIFT)
|
|
|
|
#define MSI_DATA_LEVEL_SHIFT 14
|
|
#define MSI_DATA_LEVEL_DEASSERT (0 << MSI_DATA_LEVEL_SHIFT)
|
|
#define MSI_DATA_LEVEL_ASSERT (1 << MSI_DATA_LEVEL_SHIFT)
|
|
|
|
#define MSI_DATA_TRIGGER_SHIFT 15
|
|
#define MSI_DATA_TRIGGER_EDGE (0 << MSI_DATA_TRIGGER_SHIFT)
|
|
#define MSI_DATA_TRIGGER_LEVEL (1 << MSI_DATA_TRIGGER_SHIFT)
|
|
|
|
/*
|
|
* Shift/mask fields for APIC-based bus address
|
|
*/
|
|
|
|
#define MSI_TARGET_CPU_SHIFT 4
|
|
#define MSI_ADDR_HEADER 0xfee00000
|
|
|
|
#define MSI_ADDR_DESTID_MASK 0xfff0000f
|
|
#define MSI_ADDR_DESTID_CPU(cpu) ((cpu) << MSI_TARGET_CPU_SHIFT)
|
|
|
|
#define MSI_ADDR_DESTMODE_SHIFT 2
|
|
#define MSI_ADDR_DESTMODE_PHYS (0 << MSI_ADDR_DESTMODE_SHIFT)
|
|
#define MSI_ADDR_DESTMODE_LOGIC (1 << MSI_ADDR_DESTMODE_SHIFT)
|
|
|
|
#define MSI_ADDR_REDIRECTION_SHIFT 3
|
|
#define MSI_ADDR_REDIRECTION_CPU (0 << MSI_ADDR_REDIRECTION_SHIFT)
|
|
#define MSI_ADDR_REDIRECTION_LOWPRI (1 << MSI_ADDR_REDIRECTION_SHIFT)
|
|
|
|
static struct irq_chip ia64_msi_chip;
|
|
|
|
#ifdef CONFIG_SMP
|
|
static void ia64_set_msi_irq_affinity(unsigned int irq, cpumask_t cpu_mask)
|
|
{
|
|
struct msi_msg msg;
|
|
u32 addr;
|
|
|
|
read_msi_msg(irq, &msg);
|
|
|
|
addr = msg.address_lo;
|
|
addr &= MSI_ADDR_DESTID_MASK;
|
|
addr |= MSI_ADDR_DESTID_CPU(cpu_physical_id(first_cpu(cpu_mask)));
|
|
msg.address_lo = addr;
|
|
|
|
write_msi_msg(irq, &msg);
|
|
irq_desc[irq].affinity = cpu_mask;
|
|
}
|
|
#endif /* CONFIG_SMP */
|
|
|
|
int ia64_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *desc)
|
|
{
|
|
struct msi_msg msg;
|
|
unsigned long dest_phys_id;
|
|
int irq, vector;
|
|
|
|
irq = create_irq();
|
|
if (irq < 0)
|
|
return irq;
|
|
|
|
set_irq_msi(irq, desc);
|
|
dest_phys_id = cpu_physical_id(first_cpu(cpu_online_map));
|
|
vector = irq;
|
|
|
|
msg.address_hi = 0;
|
|
msg.address_lo =
|
|
MSI_ADDR_HEADER |
|
|
MSI_ADDR_DESTMODE_PHYS |
|
|
MSI_ADDR_REDIRECTION_CPU |
|
|
MSI_ADDR_DESTID_CPU(dest_phys_id);
|
|
|
|
msg.data =
|
|
MSI_DATA_TRIGGER_EDGE |
|
|
MSI_DATA_LEVEL_ASSERT |
|
|
MSI_DATA_DELIVERY_FIXED |
|
|
MSI_DATA_VECTOR(vector);
|
|
|
|
write_msi_msg(irq, &msg);
|
|
set_irq_chip_and_handler(irq, &ia64_msi_chip, handle_edge_irq);
|
|
|
|
return irq;
|
|
}
|
|
|
|
void ia64_teardown_msi_irq(unsigned int irq)
|
|
{
|
|
destroy_irq(irq);
|
|
}
|
|
|
|
static void ia64_ack_msi_irq(unsigned int irq)
|
|
{
|
|
move_native_irq(irq);
|
|
ia64_eoi();
|
|
}
|
|
|
|
static int ia64_msi_retrigger_irq(unsigned int irq)
|
|
{
|
|
unsigned int vector = irq;
|
|
ia64_resend_irq(vector);
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Generic ops used on most IA64 platforms.
|
|
*/
|
|
static struct irq_chip ia64_msi_chip = {
|
|
.name = "PCI-MSI",
|
|
.mask = mask_msi_irq,
|
|
.unmask = unmask_msi_irq,
|
|
.ack = ia64_ack_msi_irq,
|
|
#ifdef CONFIG_SMP
|
|
.set_affinity = ia64_set_msi_irq_affinity,
|
|
#endif
|
|
.retrigger = ia64_msi_retrigger_irq,
|
|
};
|
|
|
|
|
|
int arch_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *desc)
|
|
{
|
|
if (platform_setup_msi_irq)
|
|
return platform_setup_msi_irq(pdev, desc);
|
|
|
|
return ia64_setup_msi_irq(pdev, desc);
|
|
}
|
|
|
|
void arch_teardown_msi_irq(unsigned int irq)
|
|
{
|
|
if (platform_teardown_msi_irq)
|
|
return platform_teardown_msi_irq(irq);
|
|
|
|
return ia64_teardown_msi_irq(irq);
|
|
}
|