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authorSebastian Ott <sebott@linux.vnet.ibm.com>2016-01-22 13:58:42 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2016-01-26 12:45:41 +0100
commit9e00caaea14b90a788c17a2e0c32108a3d7008ec (patch)
treef08ead621f1cd62039246a38380d3d55d9d1ffbf /arch/s390
parentc2e1fcf3ec39de092e3e84b489b5c0cc39f6dd05 (diff)
downloadlinux-9e00caaea14b90a788c17a2e0c32108a3d7008ec.tar.bz2
s390/pci: provide ZPCI_ADDR macro
Provide and use a ZPCI_ADDR macro as the complement of ZPCI_IDX to get rid of some constants in the code. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/include/asm/pci_io.h1
-rw-r--r--arch/s390/pci/pci.c10
2 files changed, 4 insertions, 7 deletions
diff --git a/arch/s390/include/asm/pci_io.h b/arch/s390/include/asm/pci_io.h
index 67f7ddd4617d..27dbc1129dfc 100644
--- a/arch/s390/include/asm/pci_io.h
+++ b/arch/s390/include/asm/pci_io.h
@@ -21,6 +21,7 @@ struct zpci_iomap_entry {
extern struct zpci_iomap_entry *zpci_iomap_start;
+#define ZPCI_ADDR(idx) (ZPCI_IOMAP_ADDR_BASE | ((u64) idx << 48))
#define ZPCI_IDX(addr) \
(((__force u64) addr & ZPCI_IOMAP_ADDR_IDX_MASK) >> 48)
#define ZPCI_OFFSET(addr) \
diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c
index 11d4f277e9f6..3942348317da 100644
--- a/arch/s390/pci/pci.c
+++ b/arch/s390/pci/pci.c
@@ -265,7 +265,6 @@ void __iomem *pci_iomap_range(struct pci_dev *pdev,
unsigned long max)
{
struct zpci_dev *zdev = to_zpci(pdev);
- u64 addr;
int idx;
if ((bar & 7) != bar)
@@ -284,8 +283,7 @@ void __iomem *pci_iomap_range(struct pci_dev *pdev,
BUG_ON(!zpci_iomap_start[idx].count);
spin_unlock(&zpci_iomap_lock);
- addr = ZPCI_IOMAP_ADDR_BASE | ((u64) idx << 48);
- return (void __iomem *) addr + offset;
+ return (void __iomem *) ZPCI_ADDR(idx) + offset;
}
EXPORT_SYMBOL(pci_iomap_range);
@@ -297,9 +295,8 @@ EXPORT_SYMBOL(pci_iomap);
void pci_iounmap(struct pci_dev *pdev, void __iomem *addr)
{
- unsigned int idx;
+ unsigned int idx = ZPCI_IDX(addr);
- idx = (((__force u64) addr) & ~ZPCI_IOMAP_ADDR_BASE) >> 48;
spin_lock(&zpci_iomap_lock);
/* Detect underrun */
BUG_ON(!zpci_iomap_start[idx].count);
@@ -611,8 +608,7 @@ static int zpci_setup_bus_resources(struct zpci_dev *zdev,
if (zdev->bars[i].val & 4)
flags |= IORESOURCE_MEM_64;
- addr = ZPCI_IOMAP_ADDR_BASE + ((u64) entry << 48);
-
+ addr = ZPCI_ADDR(entry);
size = 1UL << zdev->bars[i].size;
res = __alloc_res(zdev, addr, size, flags);