From bf19c94d5caa100f22c20d756c57e3550c01cdb8 Mon Sep 17 00:00:00 2001 From: Sebastian Ott Date: Fri, 22 Jan 2016 13:59:35 +0100 Subject: [PATCH] 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 Reviewed-by: Gerald Schaefer Signed-off-by: Martin Schwidefsky --- arch/s390/include/asm/pci_io.h | 15 +++++++++------ 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 27dbc11..69aa18b 100644 --- a/arch/s390/include/asm/pci_io.h +++ b/arch/s390/include/asm/pci_io.h @@ -8,10 +8,13 @@ #include /* 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 3942348..3627ae0 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); -- 2.7.4