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| author | Sebastian Ott <sebott@linux.vnet.ibm.com> | 2016-01-22 13:59:35 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-01-26 12:45:49 +0100 |
| commit | bf19c94d5caa100f22c20d756c57e3550c01cdb8 (patch) | |
| tree | 0fe9e0a29fddd2e083dea7ebbd141e8623abe677 /arch/s390 | |
| parent | s390/pci: provide ZPCI_ADDR macro (diff) | |
| download | linux-bf19c94d5caa100f22c20d756c57e3550c01cdb8.tar.xz linux-bf19c94d5caa100f22c20d756c57e3550c01cdb8.zip | |
s390/pci: improve ZPCI_* macros
Most of the constants defined in pci_io.h depend on each other
and thus can be calculated.
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.h | 15 | ||||
| -rw-r--r-- | arch/s390/pci/pci.c | 2 |
2 files changed, 10 insertions, 7 deletions
diff --git a/arch/s390/include/asm/pci_io.h b/arch/s390/include/asm/pci_io.h index 27dbc1129dfc..69aa18be61af 100644 --- a/arch/s390/include/asm/pci_io.h +++ b/arch/s390/include/asm/pci_io.h @@ -8,10 +8,13 @@ #include <asm/pci_insn.h> /* I/O Map */ -#define ZPCI_IOMAP_MAX_ENTRIES 0x8000 -#define ZPCI_IOMAP_ADDR_BASE 0x8000000000000000ULL -#define ZPCI_IOMAP_ADDR_IDX_MASK 0x7fff000000000000ULL -#define ZPCI_IOMAP_ADDR_OFF_MASK 0x0000ffffffffffffULL +#define ZPCI_IOMAP_SHIFT 48 +#define ZPCI_IOMAP_ADDR_BASE 0x8000000000000000UL +#define ZPCI_IOMAP_ADDR_OFF_MASK ((1UL << ZPCI_IOMAP_SHIFT) - 1) +#define ZPCI_IOMAP_MAX_ENTRIES \ + ((ULONG_MAX - ZPCI_IOMAP_ADDR_BASE + 1) / (1UL << ZPCI_IOMAP_SHIFT)) +#define ZPCI_IOMAP_ADDR_IDX_MASK \ + (~ZPCI_IOMAP_ADDR_OFF_MASK - ZPCI_IOMAP_ADDR_BASE) struct zpci_iomap_entry { u32 fh; @@ -21,9 +24,9 @@ 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_ADDR(idx) (ZPCI_IOMAP_ADDR_BASE | ((u64) idx << ZPCI_IOMAP_SHIFT)) #define ZPCI_IDX(addr) \ - (((__force u64) addr & ZPCI_IOMAP_ADDR_IDX_MASK) >> 48) + (((__force u64) addr & ZPCI_IOMAP_ADDR_IDX_MASK) >> ZPCI_IOMAP_SHIFT) #define ZPCI_OFFSET(addr) \ ((__force u64) addr & ZPCI_IOMAP_ADDR_OFF_MASK) diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c index 3942348317da..3627ae075f40 100644 --- a/arch/s390/pci/pci.c +++ b/arch/s390/pci/pci.c @@ -541,7 +541,7 @@ static void zpci_irq_exit(void) static int zpci_alloc_iomap(struct zpci_dev *zdev) { - int entry; + unsigned long entry; spin_lock(&zpci_iomap_lock); entry = find_first_zero_bit(zpci_iomap, ZPCI_IOMAP_MAX_ENTRIES); |