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MIPS: PCI: Support mapping of INTB/C/D for pci-xtalk-bridge 

Implented mapping of PCI INTB/C/D, which is needed for PCI multifunction
devices, PCI-PCI bridges and IOC3.

Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
Signed-off-by: Paul Burton <paulburton@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: James Hogan <jhogan@kernel.org>
Cc: linux-mips@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
This commit is contained in:
Thomas Bogendoerfer 2020-01-09 11:34:27 +01:00 committed by Paul Burton
parent d96ee783e3
commit 2634e5a651
No known key found for this signature in database
GPG Key ID: 3EA79FACB57500DD
2 changed files with 26 additions and 5 deletions
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3
arch/mips/include/asm/pci/bridge.h
View File

@ -806,7 +806,8 @@ struct bridge_controller {
unsigned long baddr;
unsigned long intr_addr;
struct irq_domain *domain;
unsigned int pci_int[8];
unsigned int pci_int[8][2];
unsigned int int_mapping[8][2];
u32 ioc3_sid[8];
nasid_t nasid;
};

28
arch/mips/pci/pci-xtalk-bridge.c
View File

@ -437,17 +437,28 @@ static int bridge_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
struct irq_alloc_info info;
int irq;
irq = bc->pci_int[slot];
switch (pin) {
case PCI_INTERRUPT_UNKNOWN:
case PCI_INTERRUPT_INTA:
case PCI_INTERRUPT_INTC:
pin = 0;
break;
case PCI_INTERRUPT_INTB:
case PCI_INTERRUPT_INTD:
pin = 1;
}
irq = bc->pci_int[slot][pin];
if (irq == -1) {
info.ctrl = bc;
info.nasid = bc->nasid;
info.pin = slot;
info.pin = bc->int_mapping[slot][pin];
irq = irq_domain_alloc_irqs(bc->domain, 1, bc->nasid, &info);
if (irq < 0)
return irq;
bc->pci_int[slot] = irq;
bc->pci_int[slot][pin] = irq;
}
return irq;
}
@ -458,21 +469,26 @@ static void bridge_setup_ip27_baseio6g(struct bridge_controller *bc)
{
bc->ioc3_sid[2] = IOC3_SID(IOC3_SUBSYS_IP27_BASEIO6G);
bc->ioc3_sid[6] = IOC3_SID(IOC3_SUBSYS_IP27_MIO);
bc->int_mapping[2][1] = 4;
bc->int_mapping[6][1] = 6;
}
static void bridge_setup_ip27_baseio(struct bridge_controller *bc)
{
bc->ioc3_sid[2] = IOC3_SID(IOC3_SUBSYS_IP27_BASEIO);
bc->int_mapping[2][1] = 4;
}
static void bridge_setup_ip29_baseio(struct bridge_controller *bc)
{
bc->ioc3_sid[2] = IOC3_SID(IOC3_SUBSYS_IP29_SYSBOARD);
bc->int_mapping[2][1] = 3;
}
static void bridge_setup_ip30_sysboard(struct bridge_controller *bc)
{
bc->ioc3_sid[2] = IOC3_SID(IOC3_SUBSYS_IP30_SYSBOARD);
bc->int_mapping[2][1] = 4;
}
static void bridge_setup_menet(struct bridge_controller *bc)
@ -655,7 +671,11 @@ static int bridge_probe(struct platform_device *pdev)
for (slot = 0; slot < 8; slot++) {
bridge_set(bc, b_device[slot].reg, BRIDGE_DEV_SWAP_DIR);
bc->pci_int[slot] = -1;
bc->pci_int[slot][0] = -1;
bc->pci_int[slot][1] = -1;
/* default interrupt pin mapping */
bc->int_mapping[slot][0] = slot;
bc->int_mapping[slot][1] = slot ^ 4;
}
bridge_read(bc, b_wid_tflush); /* wait until Bridge PIO complete */