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x86: pci: Assign pci irqs to all functions

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We need walk through all functions within a PCI device and assign
their IRQs accordingly.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Bin Meng 2015-07-15 16:23:40 +08:00 committed by Simon Glass
parent 93f8a31186
commit 31a2dc6955
3 changed files with 19 additions and 14 deletions
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27
arch/x86/cpu/pci.c
View File

@ -152,23 +152,30 @@ int pci_x86_write_config(struct udevice *bus, pci_dev_t bdf, uint offset,
return 0;
}
void pci_assign_irqs(int bus, int device, int func, u8 irq[4])
void pci_assign_irqs(int bus, int device, u8 irq[4])
{
pci_dev_t bdf;
int func;
u16 vendor;
u8 pin, line;
bdf = PCI_BDF(bus, device, func);
for (func = 0; func < 8; func++) {
bdf = PCI_BDF(bus, device, func);
vendor = x86_pci_read_config16(bdf, PCI_VENDOR_ID);
if (vendor == 0xffff || vendor == 0x0000)
continue;
pin = x86_pci_read_config8(bdf, PCI_INTERRUPT_PIN);
pin = x86_pci_read_config8(bdf, PCI_INTERRUPT_PIN);
/* PCI spec says all values except 1..4 are reserved */
if ((pin < 1) || (pin > 4))
return;
/* PCI spec says all values except 1..4 are reserved */
if ((pin < 1) || (pin > 4))
continue;
line = irq[pin - 1];
line = irq[pin - 1];
debug("Assigning IRQ %d to PCI device %d.%x.%d (INT%c)\n",
line, bus, device, func, 'A' + pin - 1);
debug("Assigning IRQ %d to PCI device %d.%x.%d (INT%c)\n",
line, bus, device, func, 'A' + pin - 1);
x86_pci_write_config8(bdf, PCI_INTERRUPT_LINE, line);
x86_pci_write_config8(bdf, PCI_INTERRUPT_LINE, line);
}
}

3
arch/x86/include/asm/pci.h
View File

@ -72,11 +72,10 @@ int pci_x86_write_config(struct udevice *bus, pci_dev_t bdf, uint offset,
*
* @bus: PCI bus number
* @device: PCI device number
* @func: PCI function number
* @irq: An array of IRQ numbers that are assigned to INTA through
* INTD of this PCI device.
*/
void pci_assign_irqs(int bus, int device, int func, u8 irq[4]);
void pci_assign_irqs(int bus, int device, u8 irq[4]);
#endif /* __ASSEMBLY__ */

3
arch/x86/lib/pirq_routing.c
View File

@ -98,8 +98,7 @@ void pirq_route_irqs(struct irq_info *irq, int num)
}
/* Bus, device, slots IRQs for {A,B,C,D} */
pci_assign_irqs(irq->bus, irq->devfn >> 3, irq->devfn & 7,
irq_slot);
pci_assign_irqs(irq->bus, irq->devfn >> 3, irq_slot);
irq++;
}