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s390/pci: use register pair instead of register asm

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Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Niklas Schnelle 2021-06-15 17:08:23 +02:00 committed by Vasily Gorbik
parent f3827dc6b0
commit d66a4c7f76
2 changed files with 34 additions and 45 deletions
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55
arch/s390/pci/pci_insn.c
View File

@ -63,16 +63,15 @@ u8 zpci_mod_fc(u64 req, struct zpci_fib *fib, u8 *status)
/* Refresh PCI Translations */
static inline u8 __rpcit(u64 fn, u64 addr, u64 range, u8 *status)
{
register u64 __addr asm("2") = addr;
register u64 __range asm("3") = range;
union register_pair addr_range = {.even = addr, .odd = range};
u8 cc;
asm volatile (
" .insn rre,0xb9d30000,%[fn],%[addr]\n"
" .insn rre,0xb9d30000,%[fn],%[addr_range]\n"
" ipm %[cc]\n"
" srl %[cc],28\n"
: [cc] "=d" (cc), [fn] "+d" (fn)
: [addr] "d" (__addr), "d" (__range)
: [addr_range] "d" (addr_range.pair)
: "cc");
*status = fn >> 24 & 0xff;
return cc;
@ -113,21 +112,19 @@ int __zpci_set_irq_ctrl(u16 ctl, u8 isc, union zpci_sic_iib *iib)
/* PCI Load */
static inline int ____pcilg(u64 *data, u64 req, u64 offset, u8 *status)
{
register u64 __req asm("2") = req;
register u64 __offset asm("3") = offset;
union register_pair req_off = {.even = req, .odd = offset};
int cc = -ENXIO;
u64 __data;
asm volatile (
" .insn rre,0xb9d20000,%[data],%[req]\n"
" .insn rre,0xb9d20000,%[data],%[req_off]\n"
"0: ipm %[cc]\n"
" srl %[cc],28\n"
"1:\n"
EX_TABLE(0b, 1b)
: [cc] "+d" (cc), [data] "=d" (__data), [req] "+d" (__req)
: "d" (__offset)
: "cc");
*status = __req >> 24 & 0xff;
: [cc] "+d" (cc), [data] "=d" (__data),
[req_off] "+&d" (req_off.pair) :: "cc");
*status = req_off.even >> 24 & 0xff;
*data = __data;
return cc;
}
@ -173,21 +170,19 @@ static inline int zpci_load_fh(u64 *data, const volatile void __iomem *addr,
static inline int __pcilg_mio(u64 *data, u64 ioaddr, u64 len, u8 *status)
{
register u64 addr asm("2") = ioaddr;
register u64 r3 asm("3") = len;
union register_pair ioaddr_len = {.even = ioaddr, .odd = len};
int cc = -ENXIO;
u64 __data;
asm volatile (
" .insn rre,0xb9d60000,%[data],%[ioaddr]\n"
" .insn rre,0xb9d60000,%[data],%[ioaddr_len]\n"
"0: ipm %[cc]\n"
" srl %[cc],28\n"
"1:\n"
EX_TABLE(0b, 1b)
: [cc] "+d" (cc), [data] "=d" (__data), "+d" (r3)
: [ioaddr] "d" (addr)
: "cc");
*status = r3 >> 24 & 0xff;
: [cc] "+d" (cc), [data] "=d" (__data),
[ioaddr_len] "+&d" (ioaddr_len.pair) :: "cc");
*status = ioaddr_len.odd >> 24 & 0xff;
*data = __data;
return cc;
}
@ -211,20 +206,19 @@ EXPORT_SYMBOL_GPL(zpci_load);
/* PCI Store */
static inline int __pcistg(u64 data, u64 req, u64 offset, u8 *status)
{
register u64 __req asm("2") = req;
register u64 __offset asm("3") = offset;
union register_pair req_off = {.even = req, .odd = offset};
int cc = -ENXIO;
asm volatile (
" .insn rre,0xb9d00000,%[data],%[req]\n"
" .insn rre,0xb9d00000,%[data],%[req_off]\n"
"0: ipm %[cc]\n"
" srl %[cc],28\n"
"1:\n"
EX_TABLE(0b, 1b)
: [cc] "+d" (cc), [req] "+d" (__req)
: "d" (__offset), [data] "d" (data)
: [cc] "+d" (cc), [req_off] "+&d" (req_off.pair)
: [data] "d" (data)
: "cc");
*status = __req >> 24 & 0xff;
*status = req_off.even >> 24 & 0xff;
return cc;
}
@ -257,20 +251,19 @@ static inline int zpci_store_fh(const volatile void __iomem *addr, u64 data,
static inline int __pcistg_mio(u64 data, u64 ioaddr, u64 len, u8 *status)
{
register u64 addr asm("2") = ioaddr;
register u64 r3 asm("3") = len;
union register_pair ioaddr_len = {.even = ioaddr, .odd = len};
int cc = -ENXIO;
asm volatile (
" .insn rre,0xb9d40000,%[data],%[ioaddr]\n"
" .insn rre,0xb9d40000,%[data],%[ioaddr_len]\n"
"0: ipm %[cc]\n"
" srl %[cc],28\n"
"1:\n"
EX_TABLE(0b, 1b)
: [cc] "+d" (cc), "+d" (r3)
: [data] "d" (data), [ioaddr] "d" (addr)
: "cc");
*status = r3 >> 24 & 0xff;
: [cc] "+d" (cc), [ioaddr_len] "+&d" (ioaddr_len.pair)
: [data] "d" (data)
: "cc", "memory");
*status = ioaddr_len.odd >> 24 & 0xff;
return cc;
}

24
arch/s390/pci/pci_mmio.c
View File

@ -49,8 +49,7 @@ static inline int __pcistg_mio_inuser(
void __iomem *ioaddr, const void __user *src,
u64 ulen, u8 *status)
{
register u64 addr asm("2") = (u64 __force) ioaddr;
register u64 len asm("3") = ulen;
union register_pair ioaddr_len = {.even = (u64 __force)ioaddr, .odd = ulen};
int cc = -ENXIO;
u64 val = 0;
u64 cnt = ulen;
@ -68,7 +67,7 @@ static inline int __pcistg_mio_inuser(
" aghi %[src],1\n"
" ogr %[val],%[tmp]\n"
" brctg %[cnt],0b\n"
"1: .insn rre,0xb9d40000,%[val],%[ioaddr]\n"
"1: .insn rre,0xb9d40000,%[val],%[ioaddr_len]\n"
"2: ipm %[cc]\n"
" srl %[cc],28\n"
"3: sacf 768\n"
@ -76,10 +75,9 @@ static inline int __pcistg_mio_inuser(
:
[src] "+a" (src), [cnt] "+d" (cnt),
[val] "+d" (val), [tmp] "=d" (tmp),
[len] "+d" (len), [cc] "+d" (cc),
[ioaddr] "+a" (addr)
[cc] "+d" (cc), [ioaddr_len] "+&d" (ioaddr_len.pair)
:: "cc", "memory");
*status = len >> 24 & 0xff;
*status = ioaddr_len.odd >> 24 & 0xff;
/* did we read everything from user memory? */
if (!cc && cnt != 0)
@ -195,8 +193,7 @@ static inline int __pcilg_mio_inuser(
void __user *dst, const void __iomem *ioaddr,
u64 ulen, u8 *status)
{
register u64 addr asm("2") = (u64 __force) ioaddr;
register u64 len asm("3") = ulen;
union register_pair ioaddr_len = {.even = (u64 __force)ioaddr, .odd = ulen};
u64 cnt = ulen;
int shift = ulen * 8;
int cc = -ENXIO;
@ -209,7 +206,7 @@ static inline int __pcilg_mio_inuser(
*/
asm volatile (
" sacf 256\n"
"0: .insn rre,0xb9d60000,%[val],%[ioaddr]\n"
"0: .insn rre,0xb9d60000,%[val],%[ioaddr_len]\n"
"1: ipm %[cc]\n"
" srl %[cc],28\n"
" ltr %[cc],%[cc]\n"
@ -222,18 +219,17 @@ static inline int __pcilg_mio_inuser(
"4: sacf 768\n"
EX_TABLE(0b, 4b) EX_TABLE(1b, 4b) EX_TABLE(3b, 4b)
:
[cc] "+d" (cc), [val] "=d" (val), [len] "+d" (len),
[ioaddr_len] "+&d" (ioaddr_len.pair),
[cc] "+d" (cc), [val] "=d" (val),
[dst] "+a" (dst), [cnt] "+d" (cnt), [tmp] "=d" (tmp),
[shift] "+d" (shift)
:
[ioaddr] "a" (addr)
: "cc", "memory");
:: "cc", "memory");
/* did we write everything to the user space buffer? */
if (!cc && cnt != 0)
cc = -EFAULT;
*status = len >> 24 & 0xff;
*status = ioaddr_len.odd >> 24 & 0xff;
return cc;
}