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Date: Fri, 9 Jan 2015 20:34:49 -0600
From: Rob Herring <robh@...nel.org>
To: linux-kernel@...r.kernel.org
Cc: Arnd Bergmann <arnd@...db.de>, linux-pci@...r.kernel.org,
Bjorn Helgaas <bhelgaas@...gle.com>,
Rob Herring <robh@...nel.org>,
Tanmay Inamdar <tinamdar@....com>,
linux-arm-kernel@...ts.infradead.org
Subject: [PATCH 15/16] pci/host: xgene: convert to use generic config accesses
Convert the xgene host PCI driver to use the generic config access
functions.
Signed-off-by: Rob Herring <robh@...nel.org>
Cc: Tanmay Inamdar <tinamdar@....com>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>
Cc: linux-pci@...r.kernel.org
Cc: linux-arm-kernel@...ts.infradead.org
---
drivers/pci/host/pci-xgene.c | 150 +++----------------------------------------
1 file changed, 9 insertions(+), 141 deletions(-)
diff --git a/drivers/pci/host/pci-xgene.c b/drivers/pci/host/pci-xgene.c
index b1d0596..ee6a3d3 100644
--- a/drivers/pci/host/pci-xgene.c
+++ b/drivers/pci/host/pci-xgene.c
@@ -74,92 +74,6 @@ static inline u32 pcie_bar_low_val(u32 addr, u32 flags)
return (addr & PCI_BASE_ADDRESS_MEM_MASK) | flags;
}
-/* PCIe Configuration Out/In */
-static inline void xgene_pcie_cfg_out32(void __iomem *addr, int offset, u32 val)
-{
- writel(val, addr + offset);
-}
-
-static inline void xgene_pcie_cfg_out16(void __iomem *addr, int offset, u16 val)
-{
- u32 val32 = readl(addr + (offset & ~0x3));
-
- switch (offset & 0x3) {
- case 2:
- val32 &= ~0xFFFF0000;
- val32 |= (u32)val << 16;
- break;
- case 0:
- default:
- val32 &= ~0xFFFF;
- val32 |= val;
- break;
- }
- writel(val32, addr + (offset & ~0x3));
-}
-
-static inline void xgene_pcie_cfg_out8(void __iomem *addr, int offset, u8 val)
-{
- u32 val32 = readl(addr + (offset & ~0x3));
-
- switch (offset & 0x3) {
- case 0:
- val32 &= ~0xFF;
- val32 |= val;
- break;
- case 1:
- val32 &= ~0xFF00;
- val32 |= (u32)val << 8;
- break;
- case 2:
- val32 &= ~0xFF0000;
- val32 |= (u32)val << 16;
- break;
- case 3:
- default:
- val32 &= ~0xFF000000;
- val32 |= (u32)val << 24;
- break;
- }
- writel(val32, addr + (offset & ~0x3));
-}
-
-static inline void xgene_pcie_cfg_in32(void __iomem *addr, int offset, u32 *val)
-{
- *val = readl(addr + offset);
-}
-
-static inline void xgene_pcie_cfg_in16(void __iomem *addr, int offset, u32 *val)
-{
- *val = readl(addr + (offset & ~0x3));
-
- switch (offset & 0x3) {
- case 2:
- *val >>= 16;
- break;
- }
-
- *val &= 0xFFFF;
-}
-
-static inline void xgene_pcie_cfg_in8(void __iomem *addr, int offset, u32 *val)
-{
- *val = readl(addr + (offset & ~0x3));
-
- switch (offset & 0x3) {
- case 3:
- *val = *val >> 24;
- break;
- case 2:
- *val = *val >> 16;
- break;
- case 1:
- *val = *val >> 8;
- break;
- }
- *val &= 0xFF;
-}
-
/*
* When the address bit [17:16] is 2'b01, the Configuration access will be
* treated as Type 1 and it will be forwarded to external PCIe device.
@@ -213,69 +127,23 @@ static bool xgene_pcie_hide_rc_bars(struct pci_bus *bus, int offset)
return false;
}
-static int xgene_pcie_read_config(struct pci_bus *bus, unsigned int devfn,
- int offset, int len, u32 *val)
-{
- struct xgene_pcie_port *port = bus->sysdata;
- void __iomem *addr;
-
- if ((pci_is_root_bus(bus) && devfn != 0) || !port->link_up)
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- if (xgene_pcie_hide_rc_bars(bus, offset)) {
- *val = 0;
- return PCIBIOS_SUCCESSFUL;
- }
-
- xgene_pcie_set_rtdid_reg(bus, devfn);
- addr = xgene_pcie_get_cfg_base(bus);
- switch (len) {
- case 1:
- xgene_pcie_cfg_in8(addr, offset, val);
- break;
- case 2:
- xgene_pcie_cfg_in16(addr, offset, val);
- break;
- default:
- xgene_pcie_cfg_in32(addr, offset, val);
- break;
- }
-
- return PCIBIOS_SUCCESSFUL;
-}
-
-static int xgene_pcie_write_config(struct pci_bus *bus, unsigned int devfn,
- int offset, int len, u32 val)
+static int xgene_pcie_map_bus(struct pci_bus *bus, unsigned int devfn,
+ int offset)
{
struct xgene_pcie_port *port = bus->sysdata;
- void __iomem *addr;
- if ((pci_is_root_bus(bus) && devfn != 0) || !port->link_up)
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- if (xgene_pcie_hide_rc_bars(bus, offset))
- return PCIBIOS_SUCCESSFUL;
+ if ((pci_is_root_bus(bus) && devfn != 0) || !port->link_up ||
+ xgene_pcie_hide_rc_bars(bus, offset))
+ return NULL;
xgene_pcie_set_rtdid_reg(bus, devfn);
- addr = xgene_pcie_get_cfg_base(bus);
- switch (len) {
- case 1:
- xgene_pcie_cfg_out8(addr, offset, (u8)val);
- break;
- case 2:
- xgene_pcie_cfg_out16(addr, offset, (u16)val);
- break;
- default:
- xgene_pcie_cfg_out32(addr, offset, val);
- break;
- }
-
- return PCIBIOS_SUCCESSFUL;
+ return xgene_pcie_get_cfg_base(bus);
}
static struct pci_ops xgene_pcie_ops = {
- .read = xgene_pcie_read_config,
- .write = xgene_pcie_write_config
+ .map_bus = xgene_pcie_map_bus,
+ .read = pci_generic_config_read32,
+ .write = pci_generic_config_write32,
};
static u64 xgene_pcie_set_ib_mask(void __iomem *csr_base, u32 addr,
--
2.1.0
--
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