4cb3cee03d
This patch reworks the way iSeries hooks on PCI IO operations (both MMIO and PIO) and provides a generic way for other platforms to do so (we have need to do that for various other platforms). While reworking the IO ops, I ended up doing some spring cleaning in io.h and eeh.h which I might want to split into 2 or 3 patches (among others, eeh.h had a lot of useless stuff in it). A side effect is that EEH for PIO should work now (it used to pass IO ports down to the eeh address check functions which is bogus). Also, new are MMIO "repeat" ops, which other archs like ARM already had, and that we have too now: readsb, readsw, readsl, writesb, writesw, writesl. In the long run, I might also make EEH use the hooks instead of wrapping at the toplevel, which would make things even cleaner and relegate EEH completely in platforms/iseries, but we have to measure the performance impact there (though it's really only on MMIO reads) Since I also need to hook on ioremap, I shuffled the functions a bit there. I introduced ioremap_flags() to use by drivers who want to pass explicit flags to ioremap (and it can be hooked). The old __ioremap() is still there as a low level and cannot be hooked, thus drivers who use it should migrate unless they know they want the low level version. The patch "arch provides generic iomap missing accessors" (should be number 4 in this series) is a pre-requisite to provide full iomap API support with this patch. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
89 lines
2.4 KiB
C
89 lines
2.4 KiB
C
/*
|
|
* Copyright (C) 1994-1996 Linus Torvalds & authors
|
|
*
|
|
* This file contains the powerpc architecture specific IDE code.
|
|
*/
|
|
#ifndef _ASM_POWERPC_IDE_H
|
|
#define _ASM_POWERPC_IDE_H
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#ifndef __powerpc64__
|
|
#include <linux/sched.h>
|
|
#include <asm/mpc8xx.h>
|
|
#endif
|
|
#include <asm/io.h>
|
|
|
|
#ifndef MAX_HWIFS
|
|
#ifdef __powerpc64__
|
|
#define MAX_HWIFS 10
|
|
#else
|
|
#define MAX_HWIFS 8
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef __powerpc64__
|
|
#define __ide_mm_insw(p, a, c) readsw((void __iomem *)(p), (a), (c))
|
|
#define __ide_mm_insl(p, a, c) readsl((void __iomem *)(p), (a), (c))
|
|
#define __ide_mm_outsw(p, a, c) writesw((void __iomem *)(p), (a), (c))
|
|
#define __ide_mm_outsl(p, a, c) writesl((void __iomem *)(p), (a), (c))
|
|
#else
|
|
#define __ide_mm_insw(p, a, c) _insw_ns((volatile u16 __iomem *)(p), (a), (c))
|
|
#define __ide_mm_insl(p, a, c) _insl_ns((volatile u32 __iomem *)(p), (a), (c))
|
|
#define __ide_mm_outsw(p, a, c) _outsw_ns((volatile u16 __iomem *)(p), (a), (c))
|
|
#define __ide_mm_outsl(p, a, c) _outsl_ns((volatile u32 __iomem *)(p), (a), (c))
|
|
#endif
|
|
|
|
#ifndef __powerpc64__
|
|
#include <linux/hdreg.h>
|
|
#include <linux/ioport.h>
|
|
|
|
struct ide_machdep_calls {
|
|
int (*default_irq)(unsigned long base);
|
|
unsigned long (*default_io_base)(int index);
|
|
void (*ide_init_hwif)(hw_regs_t *hw,
|
|
unsigned long data_port,
|
|
unsigned long ctrl_port,
|
|
int *irq);
|
|
};
|
|
|
|
extern struct ide_machdep_calls ppc_ide_md;
|
|
|
|
#undef SUPPORT_SLOW_DATA_PORTS
|
|
#define SUPPORT_SLOW_DATA_PORTS 0
|
|
|
|
#define IDE_ARCH_OBSOLETE_DEFAULTS
|
|
|
|
static __inline__ int ide_default_irq(unsigned long base)
|
|
{
|
|
if (ppc_ide_md.default_irq)
|
|
return ppc_ide_md.default_irq(base);
|
|
return 0;
|
|
}
|
|
|
|
static __inline__ unsigned long ide_default_io_base(int index)
|
|
{
|
|
if (ppc_ide_md.default_io_base)
|
|
return ppc_ide_md.default_io_base(index);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PCI
|
|
#define ide_init_default_irq(base) (0)
|
|
#else
|
|
#define ide_init_default_irq(base) ide_default_irq(base)
|
|
#endif
|
|
|
|
#if (defined CONFIG_APUS || defined CONFIG_BLK_DEV_MPC8xx_IDE )
|
|
#define IDE_ARCH_ACK_INTR 1
|
|
#define ide_ack_intr(hwif) (hwif->hw.ack_intr ? hwif->hw.ack_intr(hwif) : 1)
|
|
#endif
|
|
|
|
#endif /* __powerpc64__ */
|
|
|
|
#define IDE_ARCH_OBSOLETE_INIT
|
|
#define ide_default_io_ctl(base) ((base) + 0x206) /* obsolete */
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* _ASM_POWERPC_IDE_H */
|