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PCI: iproc: Convert to use the new ECAM constants

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Change interface of the function iproc_pcie_map_ep_cfg_reg() so that use
of PCI_SLOT() and PCI_FUNC() macros and most of the local ECAM-specific
constants can be dropped, and the new PCIE_ECAM_OFFSET() macro can be
used instead.  Use the ALIGN_DOWN() macro to ensure that PCI Express
ECAM offset is always 32 bit aligned.

Suggested-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20201129230743.3006978-4-kw@linux.com
Signed-off-by: Krzysztof Wilczyński <kw@linux.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Krzysztof Wilczyński 2020-11-29 23:07:41 +00:00 committed by Bjorn Helgaas
parent 31a8cdb7ef
commit 63eab4944e
1 changed files with 8 additions and 23 deletions
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31
drivers/pci/controller/pcie-iproc.c
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@ -6,6 +6,7 @@
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/pci-ecam.h>
#include <linux/msi.h>
#include <linux/clk.h>
#include <linux/module.h>
@ -39,16 +40,8 @@
#define CFG_IND_ADDR_MASK 0x00001ffc
#define CFG_ADDR_BUS_NUM_SHIFT 20
#define CFG_ADDR_BUS_NUM_MASK 0x0ff00000
#define CFG_ADDR_DEV_NUM_SHIFT 15
#define CFG_ADDR_DEV_NUM_MASK 0x000f8000
#define CFG_ADDR_FUNC_NUM_SHIFT 12
#define CFG_ADDR_FUNC_NUM_MASK 0x00007000
#define CFG_ADDR_REG_NUM_SHIFT 2
#define CFG_ADDR_REG_NUM_MASK 0x00000ffc
#define CFG_ADDR_CFG_TYPE_SHIFT 0
#define CFG_ADDR_CFG_TYPE_MASK 0x00000003
#define CFG_ADDR_CFG_TYPE_1 1
#define SYS_RC_INTX_MASK 0xf
@ -459,19 +452,15 @@ static inline void iproc_pcie_apb_err_disable(struct pci_bus *bus,
static void __iomem *iproc_pcie_map_ep_cfg_reg(struct iproc_pcie *pcie,
unsigned int busno,
unsigned int slot,
unsigned int fn,
unsigned int devfn,
int where)
{
u16 offset;
u32 val;
/* EP device access */
val = (busno << CFG_ADDR_BUS_NUM_SHIFT) |
(slot << CFG_ADDR_DEV_NUM_SHIFT) |
(fn << CFG_ADDR_FUNC_NUM_SHIFT) |
(where & CFG_ADDR_REG_NUM_MASK) |
(1 & CFG_ADDR_CFG_TYPE_MASK);
val = ALIGN_DOWN(PCIE_ECAM_OFFSET(busno, devfn, where), 4) |
CFG_ADDR_CFG_TYPE_1;
iproc_pcie_write_reg(pcie, IPROC_PCIE_CFG_ADDR, val);
offset = iproc_pcie_reg_offset(pcie, IPROC_PCIE_CFG_DATA);
@ -574,8 +563,6 @@ static int iproc_pcie_config_read(struct pci_bus *bus, unsigned int devfn,
int where, int size, u32 *val)
{
struct iproc_pcie *pcie = iproc_data(bus);
unsigned int slot = PCI_SLOT(devfn);
unsigned int fn = PCI_FUNC(devfn);
unsigned int busno = bus->number;
void __iomem *cfg_data_p;
unsigned int data;
@ -590,7 +577,7 @@ static int iproc_pcie_config_read(struct pci_bus *bus, unsigned int devfn,
return ret;
}
cfg_data_p = iproc_pcie_map_ep_cfg_reg(pcie, busno, slot, fn, where);
cfg_data_p = iproc_pcie_map_ep_cfg_reg(pcie, busno, devfn, where);
if (!cfg_data_p)
return PCIBIOS_DEVICE_NOT_FOUND;
@ -631,13 +618,11 @@ static void __iomem *iproc_pcie_map_cfg_bus(struct iproc_pcie *pcie,
int busno, unsigned int devfn,
int where)
{
unsigned slot = PCI_SLOT(devfn);
unsigned fn = PCI_FUNC(devfn);
u16 offset;
/* root complex access */
if (busno == 0) {
if (slot > 0 || fn > 0)
if (PCIE_ECAM_DEVFN(devfn) > 0)
return NULL;
iproc_pcie_write_reg(pcie, IPROC_PCIE_CFG_IND_ADDR,
@ -649,7 +634,7 @@ static void __iomem *iproc_pcie_map_cfg_bus(struct iproc_pcie *pcie,
return (pcie->base + offset);
}
return iproc_pcie_map_ep_cfg_reg(pcie, busno, slot, fn, where);
return iproc_pcie_map_ep_cfg_reg(pcie, busno, devfn, where);
}
static void __iomem *iproc_pcie_bus_map_cfg_bus(struct pci_bus *bus,