ioerror.h
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上传日期:2013-04-10
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- /* $Id$
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 1992 - 1997, 2000-2002 Silicon Graphics, Inc. All rights reserved.
- */
- #ifndef _ASM_IA64_SN_IOERROR_H
- #define _ASM_IA64_SN_IOERROR_H
- #ifndef __ASSEMBLY__
- #include <linux/types.h>
- #include <asm/sn/types.h>
- /*
- * Macros defining the various Errors to be handled as part of
- * IO Error handling.
- */
- /*
- * List of errors to be handled by each subsystem.
- * "error_code" field will take one of these values.
- * The error code is built up of single bits expressing
- * our confidence that the error was that type; note
- * that it is possible to have a PIO or DMA error where
- * we don't know whether it was a READ or a WRITE, or
- * even a READ or WRITE error that we're not sure whether
- * to call a PIO or DMA.
- *
- * It is also possible to set both PIO and DMA, and possible
- * to set both READ and WRITE; the first may be nonsensical
- * but the second *could* be used to designate an access
- * that is known to be a read-modify-write cycle. It is
- * quite possible that nobody will ever use PIO|DMA or
- * READ|WRITE ... but being flexible is good.
- */
- #define IOECODE_UNSPEC 0
- #define IOECODE_READ 1
- #define IOECODE_WRITE 2
- #define IOECODE_PIO 4
- #define IOECODE_DMA 8
- #define IOECODE_PIO_READ (IOECODE_PIO|IOECODE_READ)
- #define IOECODE_PIO_WRITE (IOECODE_PIO|IOECODE_WRITE)
- #define IOECODE_DMA_READ (IOECODE_DMA|IOECODE_READ)
- #define IOECODE_DMA_WRITE (IOECODE_DMA|IOECODE_WRITE)
- /* support older names, but try to move everything
- * to using new names that identify which package
- * controls their values ...
- */
- #define PIO_READ_ERROR IOECODE_PIO_READ
- #define PIO_WRITE_ERROR IOECODE_PIO_WRITE
- #define DMA_READ_ERROR IOECODE_DMA_READ
- #define DMA_WRITE_ERROR IOECODE_DMA_WRITE
- /*
- * List of error numbers returned by error handling sub-system.
- */
- #define IOERROR_HANDLED 0 /* Error Properly handled. */
- #define IOERROR_NODEV 0x1 /* No such device attached */
- #define IOERROR_BADHANDLE 0x2 /* Received bad handle */
- #define IOERROR_BADWIDGETNUM 0x3 /* Bad widget number */
- #define IOERROR_BADERRORCODE 0x4 /* Bad error code passed in */
- #define IOERROR_INVALIDADDR 0x5 /* Invalid address specified */
- #define IOERROR_WIDGETLEVEL 0x6 /* Some failure at widget level */
- #define IOERROR_XTALKLEVEL 0x7
- #define IOERROR_HWGRAPH_LOOKUP 0x8 /* hwgraph lookup failed for path */
- #define IOERROR_UNHANDLED 0x9 /* handler rejected error */
- #define IOERROR_PANIC 0xA /* subsidiary handler has already
- * started decode: continue error
- * data dump, and panic from top
- * caller in error chain.
- */
- /*
- * IO errors at the bus/device driver level
- */
- #define IOERROR_DEV_NOTFOUND 0x10 /* Device matching bus addr not found */
- #define IOERROR_DEV_SHUTDOWN 0x11 /* Device has been shutdown */
- /*
- * Type of address.
- * Indicates the direction of transfer that caused the error.
- */
- #define IOERROR_ADDR_PIO 1 /* Error Address generated due to PIO */
- #define IOERROR_ADDR_DMA 2 /* Error address generated due to DMA */
- /*
- * IO error structure.
- *
- * This structure would expand to hold the information retrieved from
- * all IO related error registers.
- *
- * This structure is defined to hold all system specific
- * information related to a single error.
- *
- * This serves a couple of purpose.
- * - Error handling often involves translating one form of address to other
- * form. So, instead of having different data structures at each level,
- * we have a single structure, and the appropriate fields get filled in
- * at each layer.
- * - This provides a way to dump all error related information in any layer
- * of erorr handling (debugging aid).
- *
- * A second possibility is to allow each layer to define its own error
- * data structure, and fill in the proper fields. This has the advantage
- * of isolating the layers.
- * A big concern is the potential stack usage (and overflow), if each layer
- * defines these structures on stack (assuming we don't want to do kmalloc.
- *
- * Any layer wishing to pass extra information to a layer next to it in
- * error handling hierarchy, can do so as a separate parameter.
- */
- typedef struct io_error_s {
- /* Bit fields indicating which sturcture fields are valid */
- union {
- struct {
- unsigned ievb_errortype:1;
- unsigned ievb_widgetnum:1;
- unsigned ievb_widgetdev:1;
- unsigned ievb_srccpu:1;
- unsigned ievb_srcnode:1;
- unsigned ievb_errnode:1;
- unsigned ievb_sysioaddr:1;
- unsigned ievb_xtalkaddr:1;
- unsigned ievb_busspace:1;
- unsigned ievb_busaddr:1;
- unsigned ievb_vaddr:1;
- unsigned ievb_memaddr:1;
- unsigned ievb_epc:1;
- unsigned ievb_ef:1;
- } iev_b;
- unsigned iev_a;
- } ie_v;
- short ie_errortype; /* error type: extra info about error */
- short ie_widgetnum; /* Widget number that's in error */
- short ie_widgetdev; /* Device within widget in error */
- cpuid_t ie_srccpu; /* CPU on srcnode generating error */
- cnodeid_t ie_srcnode; /* Node which caused the error */
- cnodeid_t ie_errnode; /* Node where error was noticed */
- iopaddr_t ie_sysioaddr; /* Sys specific IO address */
- iopaddr_t ie_xtalkaddr; /* Xtalk (48bit) addr of Error */
- iopaddr_t ie_busspace; /* Bus specific address space */
- iopaddr_t ie_busaddr; /* Bus specific address */
- caddr_t ie_vaddr; /* Virtual address of error */
- paddr_t ie_memaddr; /* Physical memory address */
- caddr_t ie_epc; /* pc when error reported */
- caddr_t ie_ef; /* eframe when error reported */
- } ioerror_t;
- #define IOERROR_INIT(e) do { (e)->ie_v.iev_a = 0; } while (0)
- #define IOERROR_SETVALUE(e,f,v) do { (e)->ie_ ## f = (v); (e)->ie_v.iev_b.ievb_ ## f = 1; } while (0)
- #define IOERROR_FIELDVALID(e,f) (((e)->ie_v.iev_b.ievb_ ## f) != 0)
- #define IOERROR_GETVALUE(e,f) (ASSERT(IOERROR_FIELDVALID(e,f)),((e)->ie_ ## f))
- /* hub code likes to call the SysAD address "hubaddr" ... */
- #define ie_hubaddr ie_sysioaddr
- #define ievb_hubaddr ievb_sysioaddr
- #endif
- /*
- * Error handling Modes.
- */
- typedef enum {
- MODE_DEVPROBE, /* Probing mode. Errors not fatal */
- MODE_DEVERROR, /* Error while system is running */
- MODE_DEVUSERERROR, /* Device Error created due to user mode access */
- MODE_DEVREENABLE /* Reenable pass */
- } ioerror_mode_t;
- typedef int error_handler_f(void *, int, ioerror_mode_t, ioerror_t *);
- typedef void *error_handler_arg_t;
- extern void ioerror_dump(char *, int, int, ioerror_t *);
- #ifdef ERROR_DEBUG
- #define IOERROR_DUMP(x, y, z, t) ioerror_dump((x), (y), (z), (t))
- #define IOERR_PRINTF(x) (x)
- #else
- #define IOERROR_DUMP(x, y, z, t)
- #define IOERR_PRINTF(x)
- #endif /* ERROR_DEBUG */
- #endif /* _ASM_IA64_SN_IOERROR_H */