leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

PCI: altera: Rework config accessors for use without a struct pci_bus

Browse Source 
Rework configs accessors so a future patch can use them in _probe() with
struct altera_pcie instead of struct pci_bus.

Signed-off-by: Ley Foon Tan <lftan@altera.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Ley Foon Tan 2016-08-26 09:47:24 +08:00 committed by Bjorn Helgaas
parent 411dc32d88
commit 31fc0ad47e
1 changed files with 41 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

64
drivers/pci/host/pcie-altera.c
View File

@ -330,22 +330,14 @@ static int tlp_cfg_dword_write(struct altera_pcie *pcie, u8 bus, u32 devfn,
return PCIBIOS_SUCCESSFUL;
}
static int altera_pcie_cfg_read(struct pci_bus *bus, unsigned int devfn,
int where, int size, u32 *value)
static int _altera_pcie_cfg_read(struct altera_pcie *pcie, u8 busno,
unsigned int devfn, int where, int size,
u32 *value)
{
struct altera_pcie *pcie = bus->sysdata;
int ret;
u32 data;
u8 byte_en;
if (altera_pcie_hide_rc_bar(bus, devfn, where))
return PCIBIOS_BAD_REGISTER_NUMBER;
if (!altera_pcie_valid_config(pcie, bus, PCI_SLOT(devfn))) {
*value = 0xffffffff;
return PCIBIOS_DEVICE_NOT_FOUND;
}
switch (size) {
case 1:
byte_en = 1 << (where & 3);
@ -358,7 +350,7 @@ static int altera_pcie_cfg_read(struct pci_bus *bus, unsigned int devfn,
break;
}
ret = tlp_cfg_dword_read(pcie, bus->number, devfn,
ret = tlp_cfg_dword_read(pcie, busno, devfn,
(where & ~DWORD_MASK), byte_en, &data);
if (ret != PCIBIOS_SUCCESSFUL)
return ret;
@ -378,20 +370,14 @@ static int altera_pcie_cfg_read(struct pci_bus *bus, unsigned int devfn,
return PCIBIOS_SUCCESSFUL;
}
static int altera_pcie_cfg_write(struct pci_bus *bus, unsigned int devfn,
int where, int size, u32 value)
static int _altera_pcie_cfg_write(struct altera_pcie *pcie, u8 busno,
unsigned int devfn, int where, int size,
u32 value)
{
struct altera_pcie *pcie = bus->sysdata;
u32 data32;
u32 shift = 8 * (where & 3);
u8 byte_en;
if (altera_pcie_hide_rc_bar(bus, devfn, where))
return PCIBIOS_BAD_REGISTER_NUMBER;
if (!altera_pcie_valid_config(pcie, bus, PCI_SLOT(devfn)))
return PCIBIOS_DEVICE_NOT_FOUND;
switch (size) {
case 1:
data32 = (value & 0xff) << shift;
@ -407,8 +393,40 @@ static int altera_pcie_cfg_write(struct pci_bus *bus, unsigned int devfn,
break;
}
return tlp_cfg_dword_write(pcie, bus->number, devfn,
(where & ~DWORD_MASK), byte_en, data32);
return tlp_cfg_dword_write(pcie, busno, devfn, (where & ~DWORD_MASK),
byte_en, data32);
}
static int altera_pcie_cfg_read(struct pci_bus *bus, unsigned int devfn,
int where, int size, u32 *value)
{
struct altera_pcie *pcie = bus->sysdata;
if (altera_pcie_hide_rc_bar(bus, devfn, where))
return PCIBIOS_BAD_REGISTER_NUMBER;
if (!altera_pcie_valid_config(pcie, bus, PCI_SLOT(devfn))) {
*value = 0xffffffff;
return PCIBIOS_DEVICE_NOT_FOUND;
}
return _altera_pcie_cfg_read(pcie, bus->number, devfn, where, size,
value);
}
static int altera_pcie_cfg_write(struct pci_bus *bus, unsigned int devfn,
int where, int size, u32 value)
{
struct altera_pcie *pcie = bus->sysdata;
if (altera_pcie_hide_rc_bar(bus, devfn, where))
return PCIBIOS_BAD_REGISTER_NUMBER;
if (!altera_pcie_valid_config(pcie, bus, PCI_SLOT(devfn)))
return PCIBIOS_DEVICE_NOT_FOUND;
return _altera_pcie_cfg_write(pcie, bus->number, devfn, where, size,
value);
}
static struct pci_ops altera_pcie_ops = {