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authorHuacai Chen <chenhc@lemote.com>2018-09-20 09:11:03 +0800
committerPaul Burton <paul.burton@mips.com>2018-09-19 18:57:30 -0700
commit8250a9b43b257f05c2aba6e8367fa636b630b0a2 (patch)
tree018a56062fee9d627328d4ed4a7d2245b9432b17 /arch/mips/pci
parentc824ad164760484f709daa1339df40a184f4170a (diff)
downloadlinux-8250a9b43b257f05c2aba6e8367fa636b630b0a2.tar.bz2
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>
Diffstat (limited to 'arch/mips/pci')
-rw-r--r--arch/mips/pci/ops-loongson3.c34
1 files changed, 24 insertions, 10 deletions
diff --git a/arch/mips/pci/ops-loongson3.c b/arch/mips/pci/ops-loongson3.c
index 9e118431e226..2f6ad36bdea6 100644
--- a/arch/mips/pci/ops-loongson3.c
+++ b/arch/mips/pci/ops-loongson3.c
@@ -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);
+ } else {
+ 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 = (busnum << 16) | (device << 11) | (function << 8) | reg;
- if (busnum == 0) {
- if (device > 31)
+ addr = pci_resource_start(rootdev, 3);
+ if (!addr)
return PCIBIOS_DEVICE_NOT_FOUND;
- addrp = (void *)(TO_UNCAC(HT1LO_PCICFG_BASE) | (addr & 0xffff));
- type = 0;
+ addr |= busnum << 20 | device << 15 | function << 12 | reg;
+ addrp = (void *)TO_UNCAC(addr);
} else {
- addrp = (void *)(TO_UNCAC(HT1LO_PCICFG_BASE_TP1) | (addr));
- type = 0x10000;
+ return PCIBIOS_DEVICE_NOT_FOUND;
}
if (access_type == PCI_ACCESS_WRITE)