Merge http://ftp.arm.linux.org.uk/pub/linux/arm/kernel/git-cur/linux-2.6-arm into for-rmk

1 files changed, 233 insertions, 0 deletions

diff --git a/arch/ia64/include/asm/sn/bte.h b/arch/ia64/include/asm/sn/bte.h
new file mode 100644
index 00000000000..a0d214f4311
--- /dev/null
+++ b/arch/ia64/include/asm/sn/bte.h
@@ -0,0 +1,233 @@
+/*
+ * 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) 2000-2007 Silicon Graphics, Inc.  All Rights Reserved.
+ */
+
+
+#ifndef _ASM_IA64_SN_BTE_H
+#define _ASM_IA64_SN_BTE_H
+
+#include <linux/timer.h>
+#include <linux/spinlock.h>
+#include <linux/cache.h>
+#include <asm/sn/pda.h>
+#include <asm/sn/types.h>
+#include <asm/sn/shub_mmr.h>
+
+#define IBCT_NOTIFY             (0x1UL << 4)
+#define IBCT_ZFIL_MODE          (0x1UL << 0)
+
+/* #define BTE_DEBUG */
+/* #define BTE_DEBUG_VERBOSE */
+
+#ifdef BTE_DEBUG
+#  define BTE_PRINTK(x) printk x	/* Terse */
+#  ifdef BTE_DEBUG_VERBOSE
+#    define BTE_PRINTKV(x) printk x	/* Verbose */
+#  else
+#    define BTE_PRINTKV(x)
+#  endif /* BTE_DEBUG_VERBOSE */
+#else
+#  define BTE_PRINTK(x)
+#  define BTE_PRINTKV(x)
+#endif	/* BTE_DEBUG */
+
+
+/* BTE status register only supports 16 bits for length field */
+#define BTE_LEN_BITS (16)
+#define BTE_LEN_MASK ((1 << BTE_LEN_BITS) - 1)
+#define BTE_MAX_XFER ((1 << BTE_LEN_BITS) * L1_CACHE_BYTES)
+
+
+/* Define hardware */
+#define BTES_PER_NODE (is_shub2() ? 4 : 2)
+#define MAX_BTES_PER_NODE 4
+
+#define BTE2OFF_CTRL	0
+#define BTE2OFF_SRC	(SH2_BT_ENG_SRC_ADDR_0 - SH2_BT_ENG_CSR_0)
+#define BTE2OFF_DEST	(SH2_BT_ENG_DEST_ADDR_0 - SH2_BT_ENG_CSR_0)
+#define BTE2OFF_NOTIFY	(SH2_BT_ENG_NOTIF_ADDR_0 - SH2_BT_ENG_CSR_0)
+
+#define BTE_BASE_ADDR(interface) 				\
+    (is_shub2() ? (interface == 0) ? SH2_BT_ENG_CSR_0 :		\
+		  (interface == 1) ? SH2_BT_ENG_CSR_1 :		\
+		  (interface == 2) ? SH2_BT_ENG_CSR_2 :		\
+		  		     SH2_BT_ENG_CSR_3 		\
+		: (interface == 0) ? IIO_IBLS0 : IIO_IBLS1)
+
+#define BTE_SOURCE_ADDR(base)					\
+    (is_shub2() ? base + (BTE2OFF_SRC/8) 			\
+		: base + (BTEOFF_SRC/8))
+
+#define BTE_DEST_ADDR(base)					\
+    (is_shub2() ? base + (BTE2OFF_DEST/8) 			\
+		: base + (BTEOFF_DEST/8))
+
+#define BTE_CTRL_ADDR(base)					\
+    (is_shub2() ? base + (BTE2OFF_CTRL/8) 			\
+		: base + (BTEOFF_CTRL/8))
+
+#define BTE_NOTIF_ADDR(base)					\
+    (is_shub2() ? base + (BTE2OFF_NOTIFY/8) 			\
+		: base + (BTEOFF_NOTIFY/8))
+
+/* Define hardware modes */
+#define BTE_NOTIFY IBCT_NOTIFY
+#define BTE_NORMAL BTE_NOTIFY
+#define BTE_ZERO_FILL (BTE_NOTIFY | IBCT_ZFIL_MODE)
+/* Use a reserved bit to let the caller specify a wait for any BTE */
+#define BTE_WACQUIRE 0x4000
+/* Use the BTE on the node with the destination memory */
+#define BTE_USE_DEST (BTE_WACQUIRE << 1)
+/* Use any available BTE interface on any node for the transfer */
+#define BTE_USE_ANY (BTE_USE_DEST << 1)
+/* macro to force the IBCT0 value valid */
+#define BTE_VALID_MODE(x) ((x) & (IBCT_NOTIFY | IBCT_ZFIL_MODE))
+
+#define BTE_ACTIVE		(IBLS_BUSY | IBLS_ERROR)
+#define BTE_WORD_AVAILABLE	(IBLS_BUSY << 1)
+#define BTE_WORD_BUSY		(~BTE_WORD_AVAILABLE)
+
+/*
+ * Some macros to simplify reading.
+ * Start with macros to locate the BTE control registers.
+ */
+#define BTE_LNSTAT_LOAD(_bte)						\
+			HUB_L(_bte->bte_base_addr)
+#define BTE_LNSTAT_STORE(_bte, _x)					\
+			HUB_S(_bte->bte_base_addr, (_x))
+#define BTE_SRC_STORE(_bte, _x)						\
+({									\
+		u64 __addr = ((_x) & ~AS_MASK);				\
+		if (is_shub2()) 					\
+			__addr = SH2_TIO_PHYS_TO_DMA(__addr);		\
+		HUB_S(_bte->bte_source_addr, __addr);			\
+})
+#define BTE_DEST_STORE(_bte, _x)					\
+({									\
+		u64 __addr = ((_x) & ~AS_MASK);				\
+		if (is_shub2()) 					\
+			__addr = SH2_TIO_PHYS_TO_DMA(__addr);		\
+		HUB_S(_bte->bte_destination_addr, __addr);		\
+})
+#define BTE_CTRL_STORE(_bte, _x)					\
+			HUB_S(_bte->bte_control_addr, (_x))
+#define BTE_NOTIF_STORE(_bte, _x)					\
+({									\
+		u64 __addr = ia64_tpa((_x) & ~AS_MASK);			\
+		if (is_shub2()) 					\
+			__addr = SH2_TIO_PHYS_TO_DMA(__addr);		\
+		HUB_S(_bte->bte_notify_addr, __addr);			\
+})
+
+#define BTE_START_TRANSFER(_bte, _len, _mode)				\
+	is_shub2() ? BTE_CTRL_STORE(_bte, IBLS_BUSY | (_mode << 24) | _len) \
+		: BTE_LNSTAT_STORE(_bte, _len);				\
+		  BTE_CTRL_STORE(_bte, _mode)
+
+/* Possible results from bte_copy and bte_unaligned_copy */
+/* The following error codes map into the BTE hardware codes
+ * IIO_ICRB_ECODE_* (in shubio.h). The hardware uses
+ * an error code of 0 (IIO_ICRB_ECODE_DERR), but we want zero
+ * to mean BTE_SUCCESS, so add one (BTEFAIL_OFFSET) to the error
+ * codes to give the following error codes.
+ */
+#define BTEFAIL_OFFSET	1
+
+typedef enum {
+	BTE_SUCCESS,		/* 0 is success */
+	BTEFAIL_DIR,		/* Directory error due to IIO access*/
+	BTEFAIL_POISON,		/* poison error on IO access (write to poison page) */
+	BTEFAIL_WERR,		/* Write error (ie WINV to a Read only line) */
+	BTEFAIL_ACCESS,		/* access error (protection violation) */
+	BTEFAIL_PWERR,		/* Partial Write Error */
+	BTEFAIL_PRERR,		/* Partial Read Error */
+	BTEFAIL_TOUT,		/* CRB Time out */
+	BTEFAIL_XTERR,		/* Incoming xtalk pkt had error bit */
+	BTEFAIL_NOTAVAIL,	/* BTE not available */
+} bte_result_t;
+
+#define BTEFAIL_SH2_RESP_SHORT	0x1	/* bit 000001 */
+#define BTEFAIL_SH2_RESP_LONG	0x2	/* bit 000010 */
+#define BTEFAIL_SH2_RESP_DSP	0x4	/* bit 000100 */
+#define BTEFAIL_SH2_RESP_ACCESS	0x8	/* bit 001000 */
+#define BTEFAIL_SH2_CRB_TO	0x10	/* bit 010000 */
+#define BTEFAIL_SH2_NACK_LIMIT	0x20	/* bit 100000 */
+#define BTEFAIL_SH2_ALL		0x3F	/* bit 111111 */
+
+#define	BTE_ERR_BITS	0x3FUL
+#define	BTE_ERR_SHIFT	36
+#define BTE_ERR_MASK	(BTE_ERR_BITS << BTE_ERR_SHIFT)
+
+#define BTE_ERROR_RETRY(value)						\
+	(is_shub2() ? (value != BTEFAIL_SH2_CRB_TO)			\
+		: (value != BTEFAIL_TOUT))
+
+/*
+ * On shub1 BTE_ERR_MASK will always be false, so no need for is_shub2()
+ */
+#define BTE_SHUB2_ERROR(_status)					\
+	((_status & BTE_ERR_MASK) 					\
+	   ? (((_status >> BTE_ERR_SHIFT) & BTE_ERR_BITS) | IBLS_ERROR) \
+	   : _status)
+
+#define BTE_GET_ERROR_STATUS(_status)					\
+	(BTE_SHUB2_ERROR(_status) & ~IBLS_ERROR)
+
+#define BTE_VALID_SH2_ERROR(value)					\
+	((value >= BTEFAIL_SH2_RESP_SHORT) && (value <= BTEFAIL_SH2_ALL))
+
+/*
+ * Structure defining a bte.  An instance of this
+ * structure is created in the nodepda for each
+ * bte on that node (as defined by BTES_PER_NODE)
+ * This structure contains everything necessary
+ * to work with a BTE.
+ */
+struct bteinfo_s {
+	volatile u64 notify ____cacheline_aligned;
+	u64 *bte_base_addr ____cacheline_aligned;
+	u64 *bte_source_addr;
+	u64 *bte_destination_addr;
+	u64 *bte_control_addr;
+	u64 *bte_notify_addr;
+	spinlock_t spinlock;
+	cnodeid_t bte_cnode;	/* cnode                            */
+	int bte_error_count;	/* Number of errors encountered     */
+	int bte_num;		/* 0 --> BTE0, 1 --> BTE1           */
+	int cleanup_active;	/* Interface is locked for cleanup  */
+	volatile bte_result_t bh_error;	/* error while processing   */
+	volatile u64 *most_rcnt_na;
+	struct bteinfo_s *btes_to_try[MAX_BTES_PER_NODE];
+};
+
+
+/*
+ * Function prototypes (functions defined in bte.c, used elsewhere)
+ */
+extern bte_result_t bte_copy(u64, u64, u64, u64, void *);
+extern bte_result_t bte_unaligned_copy(u64, u64, u64, u64);
+extern void bte_error_handler(unsigned long);
+
+#define bte_zero(dest, len, mode, notification) \
+	bte_copy(0, dest, len, ((mode) | BTE_ZERO_FILL), notification)
+
+/*
+ * The following is the prefered way of calling bte_unaligned_copy
+ * If the copy is fully cache line aligned, then bte_copy is
+ * used instead.  Since bte_copy is inlined, this saves a call
+ * stack.  NOTE: bte_copy is called synchronously and does block
+ * until the transfer is complete.  In order to get the asynch
+ * version of bte_copy, you must perform this check yourself.
+ */
+#define BTE_UNALIGNED_COPY(src, dest, len, mode)                        \
+	(((len & L1_CACHE_MASK) || (src & L1_CACHE_MASK) ||             \
+	  (dest & L1_CACHE_MASK)) ?                                     \
+	 bte_unaligned_copy(src, dest, len, mode) :              	\
+	 bte_copy(src, dest, len, mode, NULL))
+
+
+#endif	/* _ASM_IA64_SN_BTE_H */