149 lines
4.9 KiB
C
149 lines
4.9 KiB
C
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/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (c) 2000-2004 Silicon Graphics, Inc. All Rights Reserved.
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*/
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#ifndef _ASM_IA64_SN_BTE_H
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#define _ASM_IA64_SN_BTE_H
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#include <linux/timer.h>
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#include <linux/spinlock.h>
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#include <linux/cache.h>
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#include <asm/sn/types.h>
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/* #define BTE_DEBUG */
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/* #define BTE_DEBUG_VERBOSE */
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#ifdef BTE_DEBUG
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# define BTE_PRINTK(x) printk x /* Terse */
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# ifdef BTE_DEBUG_VERBOSE
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# define BTE_PRINTKV(x) printk x /* Verbose */
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# else
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# define BTE_PRINTKV(x)
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# endif /* BTE_DEBUG_VERBOSE */
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#else
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# define BTE_PRINTK(x)
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# define BTE_PRINTKV(x)
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#endif /* BTE_DEBUG */
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/* BTE status register only supports 16 bits for length field */
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#define BTE_LEN_BITS (16)
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#define BTE_LEN_MASK ((1 << BTE_LEN_BITS) - 1)
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#define BTE_MAX_XFER ((1 << BTE_LEN_BITS) * L1_CACHE_BYTES)
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/* Define hardware */
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#define BTES_PER_NODE 2
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/* Define hardware modes */
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#define BTE_NOTIFY (IBCT_NOTIFY)
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#define BTE_NORMAL BTE_NOTIFY
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#define BTE_ZERO_FILL (BTE_NOTIFY | IBCT_ZFIL_MODE)
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/* Use a reserved bit to let the caller specify a wait for any BTE */
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#define BTE_WACQUIRE (0x4000)
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/* Use the BTE on the node with the destination memory */
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#define BTE_USE_DEST (BTE_WACQUIRE << 1)
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/* Use any available BTE interface on any node for the transfer */
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#define BTE_USE_ANY (BTE_USE_DEST << 1)
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/* macro to force the IBCT0 value valid */
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#define BTE_VALID_MODE(x) ((x) & (IBCT_NOTIFY | IBCT_ZFIL_MODE))
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#define BTE_ACTIVE (IBLS_BUSY | IBLS_ERROR)
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#define BTE_WORD_AVAILABLE (IBLS_BUSY << 1)
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#define BTE_WORD_BUSY (~BTE_WORD_AVAILABLE)
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/*
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* Some macros to simplify reading.
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* Start with macros to locate the BTE control registers.
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*/
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#define BTE_LNSTAT_LOAD(_bte) \
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HUB_L(_bte->bte_base_addr)
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#define BTE_LNSTAT_STORE(_bte, _x) \
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HUB_S(_bte->bte_base_addr, (_x))
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#define BTE_SRC_STORE(_bte, _x) \
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HUB_S(_bte->bte_base_addr + (BTEOFF_SRC/8), (_x))
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#define BTE_DEST_STORE(_bte, _x) \
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HUB_S(_bte->bte_base_addr + (BTEOFF_DEST/8), (_x))
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#define BTE_CTRL_STORE(_bte, _x) \
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HUB_S(_bte->bte_base_addr + (BTEOFF_CTRL/8), (_x))
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#define BTE_NOTIF_STORE(_bte, _x) \
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HUB_S(_bte->bte_base_addr + (BTEOFF_NOTIFY/8), (_x))
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/* Possible results from bte_copy and bte_unaligned_copy */
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/* The following error codes map into the BTE hardware codes
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* IIO_ICRB_ECODE_* (in shubio.h). The hardware uses
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* an error code of 0 (IIO_ICRB_ECODE_DERR), but we want zero
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* to mean BTE_SUCCESS, so add one (BTEFAIL_OFFSET) to the error
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* codes to give the following error codes.
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*/
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#define BTEFAIL_OFFSET 1
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typedef enum {
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BTE_SUCCESS, /* 0 is success */
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BTEFAIL_DIR, /* Directory error due to IIO access*/
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BTEFAIL_POISON, /* poison error on IO access (write to poison page) */
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BTEFAIL_WERR, /* Write error (ie WINV to a Read only line) */
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BTEFAIL_ACCESS, /* access error (protection violation) */
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BTEFAIL_PWERR, /* Partial Write Error */
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BTEFAIL_PRERR, /* Partial Read Error */
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BTEFAIL_TOUT, /* CRB Time out */
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BTEFAIL_XTERR, /* Incoming xtalk pkt had error bit */
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BTEFAIL_NOTAVAIL, /* BTE not available */
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} bte_result_t;
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/*
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* Structure defining a bte. An instance of this
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* structure is created in the nodepda for each
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* bte on that node (as defined by BTES_PER_NODE)
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* This structure contains everything necessary
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* to work with a BTE.
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*/
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struct bteinfo_s {
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volatile u64 notify ____cacheline_aligned;
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u64 *bte_base_addr ____cacheline_aligned;
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spinlock_t spinlock;
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cnodeid_t bte_cnode; /* cnode */
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int bte_error_count; /* Number of errors encountered */
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int bte_num; /* 0 --> BTE0, 1 --> BTE1 */
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int cleanup_active; /* Interface is locked for cleanup */
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volatile bte_result_t bh_error; /* error while processing */
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volatile u64 *most_rcnt_na;
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};
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/*
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* Function prototypes (functions defined in bte.c, used elsewhere)
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*/
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extern bte_result_t bte_copy(u64, u64, u64, u64, void *);
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extern bte_result_t bte_unaligned_copy(u64, u64, u64, u64);
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extern void bte_error_handler(unsigned long);
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#define bte_zero(dest, len, mode, notification) \
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bte_copy(0, dest, len, ((mode) | BTE_ZERO_FILL), notification)
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/*
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* The following is the prefered way of calling bte_unaligned_copy
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* If the copy is fully cache line aligned, then bte_copy is
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* used instead. Since bte_copy is inlined, this saves a call
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* stack. NOTE: bte_copy is called synchronously and does block
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* until the transfer is complete. In order to get the asynch
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* version of bte_copy, you must perform this check yourself.
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*/
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#define BTE_UNALIGNED_COPY(src, dest, len, mode) \
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(((len & L1_CACHE_MASK) || (src & L1_CACHE_MASK) || \
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(dest & L1_CACHE_MASK)) ? \
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bte_unaligned_copy(src, dest, len, mode) : \
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bte_copy(src, dest, len, mode, NULL))
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#endif /* _ASM_IA64_SN_BTE_H */
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