[IA64-SGI] Bus driver for the CX port of SGI's TIO chip.

This patch is to provide CX port infrastructure for SGI TIO-based
h/w.   Also a 'core services' driver for SGI FPGA-based h/w.
                                                                                
Signed-off-by: Bruce Losure <blosure@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

arch/ia64/configs/sn2_defconfig

@@ -574,6 +574,8 @@ CONFIG_SERIAL_NONSTANDARD=y
 # CONFIG_N_HDLC is not set
 # CONFIG_STALDRV is not set
 CONFIG_SGI_SNSC=y
+CONFIG_SGI_TIOCX=y
+CONFIG_SGI_MBCS=m
 
 #
 # Serial drivers

arch/ia64/sn/kernel/Makefile

@@ -10,3 +10,4 @@
 obj-y				+= setup.o bte.o bte_error.o irq.o mca.o idle.o \
 				   huberror.o io_init.o iomv.o klconflib.o sn2/
 obj-$(CONFIG_IA64_GENERIC)      += machvec.o
+obj-$(CONFIG_SGI_TIOCX)		+= tiocx.o

drivers/char/Kconfig

@@ -399,6 +399,20 @@ config SGI_SNSC
 	  controller communication from user space (you want this!),
 	  say Y.  Otherwise, say N.
 
+config SGI_TIOCX
+       bool "SGI TIO CX driver support"
+       depends on (IA64_SGI_SN2 || IA64_GENERIC)
+       help
+         If you have an SGI Altix and you have fpga devices attached
+         to your TIO, say Y here, otherwise say N.
+
+config SGI_MBCS
+       tristate "SGI FPGA Core Services driver support"
+       depends on (IA64_SGI_SN2 || IA64_GENERIC)
+       help
+         If you have an SGI Altix with an attached SABrick
+         say Y or M here, otherwise say N.
+
 source "drivers/serial/Kconfig"
 
 config UNIX98_PTYS

drivers/char/Makefile

@@ -47,6 +47,7 @@ obj-$(CONFIG_MMTIMER)		+= mmtimer.o
 obj-$(CONFIG_VIOCONS) += viocons.o
 obj-$(CONFIG_VIOTAPE)		+= viotape.o
 obj-$(CONFIG_HVCS)		+= hvcs.o
+obj-$(CONFIG_SGI_MBCS)		+= mbcs.o
 
 obj-$(CONFIG_PRINTER) += lp.o
 obj-$(CONFIG_TIPAR) += tipar.o

include/asm-ia64/sn/addrs.h

@@ -169,7 +169,10 @@
 #define TIO_BWIN_SIZE_BITS		30	/* big window size: 1G */
 #define NODE_SWIN_BASE(n, w)		((w == 0) ? NODE_BWIN_BASE((n), SWIN0_BIGWIN) \
 		: RAW_NODE_SWIN_BASE(n, w))
+#define TIO_SWIN_BASE(n, w) 		(TIO_IO_BASE(n) + \
+					    ((u64) (w) << TIO_SWIN_SIZE_BITS))
 #define NODE_IO_BASE(n)			(GLOBAL_MMR_SPACE | NASID_SPACE(n))
+#define TIO_IO_BASE(n)                  (UNCACHED | NASID_SPACE(n))
 #define BWIN_SIZE			(1UL << BWIN_SIZE_BITS)
 #define NODE_BWIN_BASE0(n)		(NODE_IO_BASE(n) + BWIN_SIZE)
 #define NODE_BWIN_BASE(n, w)		(NODE_BWIN_BASE0(n) + ((u64) (w) << BWIN_SIZE_BITS))

include/asm-ia64/sn/tiocx.h

@@ -0,0 +1,71 @@
+/*
+ * 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) 2005 Silicon Graphics, Inc. All rights reserved.
+ */
+
+#ifndef _ASM_IA64_SN_TIO_TIOCX_H
+#define _ASM_IA64_SN_TIO_TIOCX_H
+
+#ifdef __KERNEL__
+
+struct cx_id_s {
+	unsigned int part_num;
+	unsigned int mfg_num;
+	int nasid;
+};
+
+struct cx_dev {
+	struct cx_id_s cx_id;
+	void *soft;			/* driver specific */
+	struct hubdev_info *hubdev;
+	struct device dev;
+	struct cx_drv *driver;
+};
+
+struct cx_device_id {
+	unsigned int part_num;
+	unsigned int mfg_num;
+};
+
+struct cx_drv {
+	char *name;
+	const struct cx_device_id *id_table;
+	struct device_driver driver;
+	int (*probe) (struct cx_dev * dev, const struct cx_device_id * id);
+	int (*remove) (struct cx_dev * dev);
+};
+
+/* create DMA address by stripping AS bits */
+#define TIOCX_DMA_ADDR(a) (uint64_t)((uint64_t)(a) & 0xffffcfffffffffUL)
+
+#define TIOCX_TO_TIOCX_DMA_ADDR(a) (uint64_t)(((uint64_t)(a) & 0xfffffffff) |  \
+                                  ((((uint64_t)(a)) & 0xffffc000000000UL) <<2))
+
+#define TIO_CE_ASIC_PARTNUM 0xce00
+#define TIOCX_CORELET 3
+
+/* These are taken from tio_mmr_as.h */
+#define TIO_ICE_FRZ_CFG               TIO_MMR_ADDR_MOD(0x00000000b0008100UL)
+#define TIO_ICE_PMI_TX_CFG            TIO_MMR_ADDR_MOD(0x00000000b000b100UL)
+#define TIO_ICE_PMI_TX_DYN_CREDIT_STAT_CB3 TIO_MMR_ADDR_MOD(0x00000000b000be18UL)
+#define TIO_ICE_PMI_TX_DYN_CREDIT_STAT_CB3_CREDIT_CNT_MASK 0x000000000000000fUL
+
+#define to_cx_dev(n) container_of(n, struct cx_dev, dev)
+#define to_cx_driver(drv) container_of(drv, struct cx_drv, driver)
+
+extern struct sn_irq_info *tiocx_irq_alloc(nasid_t, int, int, nasid_t, int);
+extern void tiocx_irq_free(struct sn_irq_info *);
+extern int cx_device_unregister(struct cx_dev *);
+extern int cx_device_register(nasid_t, int, int, struct hubdev_info *);
+extern int cx_driver_unregister(struct cx_drv *);
+extern int cx_driver_register(struct cx_drv *);
+extern uint64_t tiocx_dma_addr(uint64_t addr);
+extern uint64_t tiocx_swin_base(int nasid);
+extern void tiocx_mmr_store(int nasid, uint64_t offset, uint64_t value);
+extern uint64_t tiocx_mmr_load(int nasid, uint64_t offset);
+
+#endif				//  __KERNEL__
+#endif				// _ASM_IA64_SN_TIO_TIOCX__