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MIPS/PCI: Let Loongson-3 pci_ops access extended config space 

Original Loongson-3 pci_ops can only access standard pci config space,
this patch let it be able to access extended pci config space.

Signed-off-by: Huacai Chen <chenhc@lemote.com>
[paul.burton@mips.com: Tweaks to fix checkpatch warnings, reverse xmas tree]
Signed-off-by: Paul Burton <paul.burton@mips.com>
Patchwork: https://patchwork.linux-mips.org/patch/20707/
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: James Hogan <jhogan@kernel.org>
Cc: linux-mips@linux-mips.org
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Cc: Huacai Chen <chenhuacai@gmail.com>
This commit is contained in:
Huacai Chen 2018-09-20 09:11:03 +08:00 committed by Paul Burton
parent c824ad1647
commit 8250a9b43b
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GPG Key ID: 3EA79FACB57500DD
1 changed files with 24 additions and 10 deletions
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30
arch/mips/pci/ops-loongson3.c
View File

@ -18,22 +18,36 @@ static int loongson3_pci_config_access(unsigned char access_type,
int where, u32 *data)
{
unsigned char busnum = bus->number;
u_int64_t addr, type;
void *addrp;
int device = PCI_SLOT(devfn);
int function = PCI_FUNC(devfn);
int device = PCI_SLOT(devfn);
int reg = where & ~3;
void *addrp;
u64 addr;
if (where < PCI_CFG_SPACE_SIZE) { /* standard config */
addr = (busnum << 16) | (device << 11) | (function << 8) | reg;
if (busnum == 0) {
if (device > 31)
return PCIBIOS_DEVICE_NOT_FOUND;
addrp = (void *)(TO_UNCAC(HT1LO_PCICFG_BASE) | (addr & 0xffff));
type = 0;
addrp = (void *)TO_UNCAC(HT1LO_PCICFG_BASE | addr);
} else {
addrp = (void *)(TO_UNCAC(HT1LO_PCICFG_BASE_TP1) | (addr));
type = 0x10000;
addrp = (void *)TO_UNCAC(HT1LO_PCICFG_BASE_TP1 | addr);
}
} else if (where < PCI_CFG_SPACE_EXP_SIZE) { /* extended config */
struct pci_dev *rootdev;
rootdev = pci_get_domain_bus_and_slot(0, 0, 0);
if (!rootdev)
return PCIBIOS_DEVICE_NOT_FOUND;
addr = pci_resource_start(rootdev, 3);
if (!addr)
return PCIBIOS_DEVICE_NOT_FOUND;
addr |= busnum << 20 | device << 15 | function << 12 | reg;
addrp = (void *)TO_UNCAC(addr);
} else {
return PCIBIOS_DEVICE_NOT_FOUND;
}
if (access_type == PCI_ACCESS_WRITE)