[PATCH][1/3] RapidIO support: core

[PATCH][1/3] RapidIO support: core

[Matt Porter]

Adds a RapidIO subsystem to the kernel. RIO is a switched
fabric interconnect used in higher-end embedded applications.
The curious can look at the specs over at http://www.rapidio.org

The core code implements enumeration/discovery, management of
devices/resources, and interfaces for RIO drivers.

There's a lot more to do to take advantages of all the hardware
features. However, this should provide a good base for folks
with RIO hardware to start contributing.

Signed-off-by: Matt Porter <mporter@kernel.crashing.org>

Patch is 108KB and can be found here:
ftp://source.mvista.com/pub/rio/l26_rio_core.patch

-Matt

[PATCH][2/3] RapidIO support: ppc32

[Matt Porter]

Adds PPC32 RIO support.  Init code for the MPC85xx RIO ports
and glue for the STx GP3 board to use it.

Signed-off-by: Matt Porter <mporter@kernel.crashing.org>

Index: arch/ppc/Kconfig
===================================================================
--- 750e10a6553cacbd2b92b52fe40afdc8062f4f78/arch/ppc/Kconfig  (mode:100644)
+++ f0bf7810dbe8c4073832d6c3785364084e9523a7/arch/ppc/Kconfig  (mode:100644)
@@ -1177,6 +1177,14 @@
 
 source "drivers/pcmcia/Kconfig"
 
+config RAPIDIO
+	bool "RapidIO support" if MPC8540 || MPC8560
+	help
+	  If you say Y here, the kernel will include drivers and
+	  infrastructure code to support RapidIO interconnect devices.
+
+source "drivers/rio/Kconfig"
+
 endmenu
 
 menu "Advanced setup"
Index: arch/ppc/configs/stx_gp3_defconfig
===================================================================
--- 750e10a6553cacbd2b92b52fe40afdc8062f4f78/arch/ppc/configs/stx_gp3_defconfig  (mode:100644)
+++ f0bf7810dbe8c4073832d6c3785364084e9523a7/arch/ppc/configs/stx_gp3_defconfig  (mode:100644)
@@ -1,7 +1,7 @@
 #
 # Automatically generated make config: don't edit
-# Linux kernel version: 2.6.11-rc2
-# Wed Jan 26 14:32:58 2005
+# Linux kernel version: 2.6.12-rc4
+# Tue May 24 18:11:04 2005
 #
 CONFIG_MMU=y
 CONFIG_GENERIC_HARDIRQS=y
@@ -11,6 +11,7 @@
 CONFIG_PPC=y
 CONFIG_PPC32=y
 CONFIG_GENERIC_NVRAM=y
+CONFIG_SCHED_NO_NO_OMIT_FRAME_POINTER=y
 
 #
 # Code maturity level options
@@ -18,6 +19,7 @@
 CONFIG_EXPERIMENTAL=y
 CONFIG_CLEAN_COMPILE=y
 CONFIG_BROKEN_ON_SMP=y
+CONFIG_INIT_ENV_ARG_LIMIT=32
 
 #
 # General setup
@@ -29,7 +31,6 @@
 # CONFIG_BSD_PROCESS_ACCT is not set
 CONFIG_SYSCTL=y
 # CONFIG_AUDIT is not set
-CONFIG_LOG_BUF_SHIFT=14
 CONFIG_HOTPLUG=y
 CONFIG_KOBJECT_UEVENT=y
 # CONFIG_IKCONFIG is not set
@@ -37,6 +38,9 @@
 CONFIG_KALLSYMS=y
 # CONFIG_KALLSYMS_ALL is not set
 # CONFIG_KALLSYMS_EXTRA_PASS is not set
+CONFIG_PRINTK=y
+CONFIG_BUG=y
+CONFIG_BASE_FULL=y
 CONFIG_FUTEX=y
 CONFIG_EPOLL=y
 # CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
@@ -46,6 +50,7 @@
 CONFIG_CC_ALIGN_LOOPS=0
 CONFIG_CC_ALIGN_JUMPS=0
 # CONFIG_TINY_SHMEM is not set
+CONFIG_BASE_SMALL=0
 
 #
 # Loadable module support
@@ -69,9 +74,11 @@
 CONFIG_E500=y
 CONFIG_BOOKE=y
 CONFIG_FSL_BOOKE=y
+# CONFIG_PHYS_64BIT is not set
 # CONFIG_SPE is not set
 CONFIG_MATH_EMULATION=y
 # CONFIG_CPU_FREQ is not set
+# CONFIG_PM is not set
 CONFIG_85xx=y
 CONFIG_PPC_INDIRECT_PCI_BE=y
 
@@ -96,6 +103,7 @@
 CONFIG_BINFMT_ELF=y
 CONFIG_BINFMT_MISC=m
 # CONFIG_CMDLINE_BOOL is not set
+CONFIG_ISA_DMA_API=y
 
 #
 # Bus options
@@ -104,15 +112,15 @@
 CONFIG_PCI_DOMAINS=y
 # CONFIG_PCI_LEGACY_PROC is not set
 # CONFIG_PCI_NAMES is not set
+# CONFIG_PCI_DEBUG is not set
 
 #
 # PCCARD (PCMCIA/CardBus) support
 #
 # CONFIG_PCCARD is not set
-
-#
-# PC-card bridges
-#
+CONFIG_RAPIDIO=y
+CONFIG_RAPIDIO_8_BIT_TRANSPORT=y
+CONFIG_RAPIDIO_DISC_TIMEOUT=30
 
 #
 # Advanced setup
@@ -152,7 +160,7 @@
 CONFIG_PARPORT_PC=m
 # CONFIG_PARPORT_PC_FIFO is not set
 # CONFIG_PARPORT_PC_SUPERIO is not set
-# CONFIG_PARPORT_OTHER is not set
+# CONFIG_PARPORT_GSC is not set
 # CONFIG_PARPORT_1284 is not set
 
 #
@@ -264,7 +272,6 @@
 # CONFIG_SCSI_BUSLOGIC is not set
 # CONFIG_SCSI_DMX3191D is not set
 # CONFIG_SCSI_EATA is not set
-# CONFIG_SCSI_EATA_PIO is not set
 # CONFIG_SCSI_FUTURE_DOMAIN is not set
 # CONFIG_SCSI_GDTH is not set
 # CONFIG_SCSI_IPS is not set
@@ -274,7 +281,6 @@
 # CONFIG_SCSI_IMM is not set
 # CONFIG_SCSI_SYM53C8XX_2 is not set
 # CONFIG_SCSI_IPR is not set
-# CONFIG_SCSI_QLOGIC_ISP is not set
 # CONFIG_SCSI_QLOGIC_FC is not set
 # CONFIG_SCSI_QLOGIC_1280 is not set
 CONFIG_SCSI_QLA2XXX=m
@@ -283,6 +289,7 @@
 # CONFIG_SCSI_QLA2300 is not set
 # CONFIG_SCSI_QLA2322 is not set
 # CONFIG_SCSI_QLA6312 is not set
+# CONFIG_SCSI_LPFC is not set
 # CONFIG_SCSI_DC395x is not set
 # CONFIG_SCSI_DC390T is not set
 # CONFIG_SCSI_NSP32 is not set
@@ -322,7 +329,6 @@
 #
 CONFIG_PACKET=y
 # CONFIG_PACKET_MMAP is not set
-# CONFIG_NETLINK_DEV is not set
 CONFIG_UNIX=y
 # CONFIG_NET_KEY is not set
 CONFIG_INET=y
@@ -431,7 +437,7 @@
 #
 # Network testing
 #
-# CONFIG_NET_PKTGEN is not set
+CONFIG_NET_PKTGEN=y
 # CONFIG_NETPOLL is not set
 # CONFIG_NET_POLL_CONTROLLER is not set
 # CONFIG_HAMRADIO is not set
@@ -499,6 +505,7 @@
 # Wan interfaces
 #
 # CONFIG_WAN is not set
+CONFIG_RIONET=y
 # CONFIG_FDDI is not set
 # CONFIG_HIPPI is not set
 # CONFIG_PLIP is not set
@@ -536,20 +543,6 @@
 # CONFIG_INPUT_EVBUG is not set
 
 #
-# Input I/O drivers
-#
-# CONFIG_GAMEPORT is not set
-CONFIG_SOUND_GAMEPORT=y
-CONFIG_SERIO=y
-CONFIG_SERIO_I8042=y
-CONFIG_SERIO_SERPORT=y
-# CONFIG_SERIO_CT82C710 is not set
-# CONFIG_SERIO_PARKBD is not set
-# CONFIG_SERIO_PCIPS2 is not set
-CONFIG_SERIO_LIBPS2=y
-# CONFIG_SERIO_RAW is not set
-
-#
 # Input Device Drivers
 #
 CONFIG_INPUT_KEYBOARD=y
@@ -567,6 +560,19 @@
 # CONFIG_INPUT_MISC is not set
 
 #
+# Hardware I/O ports
+#
+CONFIG_SERIO=y
+CONFIG_SERIO_I8042=y
+CONFIG_SERIO_SERPORT=y
+# CONFIG_SERIO_PARKBD is not set
+# CONFIG_SERIO_PCIPS2 is not set
+CONFIG_SERIO_LIBPS2=y
+# CONFIG_SERIO_RAW is not set
+# CONFIG_GAMEPORT is not set
+CONFIG_SOUND_GAMEPORT=y
+
+#
 # Character devices
 #
 # CONFIG_VT is not set
@@ -590,6 +596,7 @@
 # CONFIG_SERIAL_CPM_SCC4 is not set
 # CONFIG_SERIAL_CPM_SMC1 is not set
 # CONFIG_SERIAL_CPM_SMC2 is not set
+# CONFIG_SERIAL_JSM is not set
 CONFIG_UNIX98_PTYS=y
 CONFIG_LEGACY_PTYS=y
 CONFIG_LEGACY_PTY_COUNT=256
@@ -626,6 +633,11 @@
 # CONFIG_RAW_DRIVER is not set
 
 #
+# TPM devices
+#
+# CONFIG_TCG_TPM is not set
+
+#
 # I2C support
 #
 CONFIG_I2C=m
@@ -648,12 +660,12 @@
 # CONFIG_I2C_AMD8111 is not set
 # CONFIG_I2C_I801 is not set
 # CONFIG_I2C_I810 is not set
+# CONFIG_I2C_PIIX4 is not set
 # CONFIG_I2C_ISA is not set
 # CONFIG_I2C_MPC is not set
 # CONFIG_I2C_NFORCE2 is not set
 # CONFIG_I2C_PARPORT is not set
 # CONFIG_I2C_PARPORT_LIGHT is not set
-# CONFIG_I2C_PIIX4 is not set
 # CONFIG_I2C_PROSAVAGE is not set
 # CONFIG_I2C_SAVAGE4 is not set
 # CONFIG_SCx200_ACB is not set
@@ -677,7 +689,9 @@
 # CONFIG_SENSORS_ASB100 is not set
 # CONFIG_SENSORS_DS1621 is not set
 # CONFIG_SENSORS_FSCHER is not set
+# CONFIG_SENSORS_FSCPOS is not set
 # CONFIG_SENSORS_GL518SM is not set
+# CONFIG_SENSORS_GL520SM is not set
 # CONFIG_SENSORS_IT87 is not set
 # CONFIG_SENSORS_LM63 is not set
 # CONFIG_SENSORS_LM75 is not set
@@ -688,9 +702,11 @@
 # CONFIG_SENSORS_LM85 is not set
 # CONFIG_SENSORS_LM87 is not set
 # CONFIG_SENSORS_LM90 is not set
+# CONFIG_SENSORS_LM92 is not set
 # CONFIG_SENSORS_MAX1619 is not set
 # CONFIG_SENSORS_PC87360 is not set
 # CONFIG_SENSORS_SMSC47B397 is not set
+# CONFIG_SENSORS_SIS5595 is not set
 # CONFIG_SENSORS_SMSC47M1 is not set
 # CONFIG_SENSORS_VIA686A is not set
 # CONFIG_SENSORS_W83781D is not set
@@ -700,10 +716,12 @@
 #
 # Other I2C Chip support
 #
+# CONFIG_SENSORS_DS1337 is not set
 # CONFIG_SENSORS_EEPROM is not set
 # CONFIG_SENSORS_PCF8574 is not set
 # CONFIG_SENSORS_PCF8591 is not set
 # CONFIG_SENSORS_RTC8564 is not set
+# CONFIG_SENSORS_M41T00 is not set
 # CONFIG_I2C_DEBUG_CORE is not set
 # CONFIG_I2C_DEBUG_ALGO is not set
 # CONFIG_I2C_DEBUG_BUS is not set
@@ -732,7 +750,6 @@
 # Graphics support
 #
 # CONFIG_FB is not set
-# CONFIG_BACKLIGHT_LCD_SUPPORT is not set
 
 #
 # Sound
@@ -752,13 +769,9 @@
 #
 # USB support
 #
-# CONFIG_USB is not set
 CONFIG_USB_ARCH_HAS_HCD=y
 CONFIG_USB_ARCH_HAS_OHCI=y
-
-#
-# NOTE: USB_STORAGE enables SCSI, and 'SCSI disk support' may also be needed; see USB_STORAGE Help for more information
-#
+# CONFIG_USB is not set
 
 #
 # USB Gadget Support
@@ -789,6 +802,10 @@
 CONFIG_FS_MBCACHE=y
 # CONFIG_REISERFS_FS is not set
 # CONFIG_JFS_FS is not set
+
+#
+# XFS support
+#
 # CONFIG_XFS_FS is not set
 # CONFIG_MINIX_FS is not set
 # CONFIG_ROMFS_FS is not set
@@ -859,7 +876,6 @@
 CONFIG_ROOT_NFS=y
 CONFIG_LOCKD=y
 CONFIG_LOCKD_V4=y
-# CONFIG_EXPORTFS is not set
 CONFIG_SUNRPC=y
 # CONFIG_RPCSEC_GSS_KRB5 is not set
 # CONFIG_RPCSEC_GSS_SPKM3 is not set
@@ -942,8 +958,10 @@
 #
 # Kernel hacking
 #
+# CONFIG_PRINTK_TIME is not set
 CONFIG_DEBUG_KERNEL=y
 # CONFIG_MAGIC_SYSRQ is not set
+CONFIG_LOG_BUF_SHIFT=14
 # CONFIG_SCHEDSTATS is not set
 # CONFIG_DEBUG_SLAB is not set
 # CONFIG_DEBUG_SPINLOCK is not set
Index: arch/ppc/kernel/Makefile
===================================================================
--- 750e10a6553cacbd2b92b52fe40afdc8062f4f78/arch/ppc/kernel/Makefile  (mode:100644)
+++ f0bf7810dbe8c4073832d6c3785364084e9523a7/arch/ppc/kernel/Makefile  (mode:100644)
@@ -22,6 +22,7 @@
 obj-$(CONFIG_MODULES)		+= module.o ppc_ksyms.o
 obj-$(CONFIG_NOT_COHERENT_CACHE)	+= dma-mapping.o
 obj-$(CONFIG_PCI)		+= pci.o
+obj-$(CONFIG_RAPIDIO)		+= rio.o
 obj-$(CONFIG_KGDB)		+= ppc-stub.o
 obj-$(CONFIG_SMP)		+= smp.o smp-tbsync.o
 obj-$(CONFIG_TAU)		+= temp.o
Index: arch/ppc/kernel/rio.c
===================================================================
--- /dev/null  (tree:750e10a6553cacbd2b92b52fe40afdc8062f4f78)
+++ f0bf7810dbe8c4073832d6c3785364084e9523a7/arch/ppc/kernel/rio.c  (mode:100644)
@@ -0,0 +1,52 @@
+/*
+ * RapidIO PPC32 support
+ *
+ * Copyright 2005 MontaVista Software, Inc.
+ * Matt Porter <mporter@kernel.crashing.org>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/rio.h>
+
+#include <asm/rio.h>
+
+/**
+ * platform_rio_init - Do platform specific RIO init
+ *
+ * Any platform specific initialization of RapdIO
+ * hardware is done here as well as registration
+ * of any active master ports in the system.
+ */
+void __attribute__ ((weak))
+    platform_rio_init(void)
+{
+	printk(KERN_WARNING "RIO: No platform_rio_init() present\n");
+}
+
+/**
+ * ppc_rio_init - Do PPC32 RIO init
+ *
+ * Calls platform-specific RIO init code and then calls
+ * rio_init_mports() to initialize any master ports that
+ * have been registered with the RIO subsystem.
+ */
+static int __init ppc_rio_init(void)
+{
+	printk(KERN_INFO "RIO: RapidIO init\n");
+
+	/* Platform specific initialization */
+	platform_rio_init();
+
+	/* Enumerate all registered ports */
+	rio_init_mports();
+
+	return 0;
+}
+
+subsys_initcall(ppc_rio_init);
Index: arch/ppc/platforms/85xx/stx_gp3.c
===================================================================
--- 750e10a6553cacbd2b92b52fe40afdc8062f4f78/arch/ppc/platforms/85xx/stx_gp3.c  (mode:100644)
+++ f0bf7810dbe8c4073832d6c3785364084e9523a7/arch/ppc/platforms/85xx/stx_gp3.c  (mode:100644)
@@ -38,6 +38,7 @@
 #include <linux/module.h>
 #include <linux/fsl_devices.h>
 #include <linux/interrupt.h>
+#include <linux/rio.h>
 
 #include <asm/system.h>
 #include <asm/pgtable.h>
@@ -59,6 +60,7 @@
 
 #include <syslib/cpm2_pic.h>
 #include <syslib/ppc85xx_common.h>
+#include <syslib/ppc85xx_rio.h>
 
 extern void cpm2_reset(void);
 
@@ -200,7 +202,6 @@
 static void __init
 gp3_init_IRQ(void)
 {
-	int i;
 	bd_t *binfo = (bd_t *) __res;
 
 	/*
@@ -297,6 +298,18 @@
 }
 #endif /* CONFIG_PCI */
 
+#ifdef CONFIG_RAPIDIO
+void
+platform_rio_init(void)
+{
+	/*
+	 * The STx firmware configures the RapidIO Local Access Window
+	 * at 0xc0000000 with a size of 512MB.
+	 */
+	mpc85xx_rio_setup(0xc0000000, 0x20000000);
+}
+#endif /* CONFIG_RAPIDIO */
+
 void __init
 platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
 	      unsigned long r6, unsigned long r7)
Index: arch/ppc/syslib/Makefile
===================================================================
--- 750e10a6553cacbd2b92b52fe40afdc8062f4f78/arch/ppc/syslib/Makefile  (mode:100644)
+++ f0bf7810dbe8c4073832d6c3785364084e9523a7/arch/ppc/syslib/Makefile  (mode:100644)
@@ -101,6 +101,7 @@
 					mpc85xx_devices.o
 ifeq ($(CONFIG_85xx),y)
 obj-$(CONFIG_PCI)		+= indirect_pci.o pci_auto.o
+obj-$(CONFIG_RAPIDIO)		+= ppc85xx_rio.o
 endif
 obj-$(CONFIG_83xx)		+= ipic.o ppc83xx_setup.o ppc_sys.o \
 					mpc83xx_sys.o mpc83xx_devices.o
Index: arch/ppc/syslib/ppc85xx_rio.c
===================================================================
--- /dev/null  (tree:750e10a6553cacbd2b92b52fe40afdc8062f4f78)
+++ f0bf7810dbe8c4073832d6c3785364084e9523a7/arch/ppc/syslib/ppc85xx_rio.c  (mode:100644)
@@ -0,0 +1,867 @@
+/*
+ * MPC85xx RapidIO support
+ *
+ * Copyright 2005 MontaVista Software, Inc.
+ * Matt Porter <mporter@kernel.crashing.org>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/dma-mapping.h>
+#include <linux/interrupt.h>
+#include <linux/rio.h>
+#include <linux/rio_drv.h>
+
+#include <asm/io.h>
+
+#define RIO_REGS_BASE		(CCSRBAR + 0xc0000)
+#define RIO_ATMU_REGS_OFFSET	0x10c00
+#define RIO_MSG_REGS_OFFSET	0x11000
+#define RIO_MAINT_WIN_SIZE	0x400000
+#define RIO_DBELL_WIN_SIZE	0x1000
+
+#define RIO_MSG_OMR_MUI		0x00000002
+#define RIO_MSG_OSR_TE		0x00000080
+#define RIO_MSG_OSR_QOI		0x00000020
+#define RIO_MSG_OSR_QFI		0x00000010
+#define RIO_MSG_OSR_MUB		0x00000004
+#define RIO_MSG_OSR_EOMI	0x00000002
+#define RIO_MSG_OSR_QEI		0x00000001
+
+#define RIO_MSG_IMR_MI		0x00000002
+#define RIO_MSG_ISR_TE		0x00000080
+#define RIO_MSG_ISR_QFI		0x00000010
+#define RIO_MSG_ISR_DIQI	0x00000001
+
+#define RIO_MSG_DESC_SIZE	32
+#define RIO_MIN_TX_RING_SIZE	2
+#define RIO_MAX_TX_RING_SIZE	2048
+#define RIO_MIN_RX_RING_SIZE	2
+#define RIO_MAX_RX_RING_SIZE	2048
+
+#define DOORBELL_DMR_DI		0x00000002
+#define DOORBELL_DSR_TE		0x00000080
+#define DOORBELL_DSR_QFI	0x00000010
+#define DOORBELL_DSR_DIQI	0x00000001
+#define DOORBELL_TID_OFFSET	0x03
+#define DOORBELL_SID_OFFSET	0x05
+#define DOORBELL_INFO_OFFSET	0x06
+
+#define DOORBELL_MESSAGE_SIZE	0x08
+#define DBELL_SID(x)		(*(u8 *)(x + DOORBELL_SID_OFFSET))
+#define DBELL_TID(x)		(*(u8 *)(x + DOORBELL_TID_OFFSET))
+#define DBELL_INF(x)		(*(u16 *)(x + DOORBELL_INFO_OFFSET))
+
+#define is_power_of_2(x)	(((x) & ((x) - 1)) == 0)
+
+struct rio_atmu_regs {
+	u32 rowtar;
+	u32 pad1;
+	u32 rowbar;
+	u32 pad2;
+	u32 rowar;
+	u32 pad3[3];
+};
+
+struct rio_msg_regs {
+	u32 omr;
+	u32 osr;
+	u32 pad1;
+	u32 odqdpar;
+	u32 pad2;
+	u32 osar;
+	u32 odpr;
+	u32 odatr;
+	u32 odcr;
+	u32 pad3;
+	u32 odqepar;
+	u32 pad4[13];
+	u32 imr;
+	u32 isr;
+	u32 pad5;
+	u32 ifqdpar;
+	u32 pad6;
+	u32 ifqepar;
+	u32 pad7[250];
+	u32 dmr;
+	u32 dsr;
+	u32 pad8;
+	u32 dqdpar;
+	u32 pad9;
+	u32 dqepar;
+	u32 pad10[26];
+	u32 pwmr;
+	u32 pwsr;
+	u32 pad11;
+	u32 pwqbar;
+};
+
+struct rio_tx_desc {
+	u32 res1;
+	u32 saddr;
+	u32 dport;
+	u32 dattr;
+	u32 res2;
+	u32 res3;
+	u32 dwcnt;
+	u32 res4;
+};
+
+static u32 regs_win;
+static struct rio_atmu_regs *atmu_regs;
+static struct rio_atmu_regs *maint_atmu_regs;
+static struct rio_atmu_regs *dbell_atmu_regs;
+static u32 dbell_win;
+static u32 maint_win;
+static struct rio_msg_regs *msg_regs;
+
+static struct rio_dbell_ring {
+	void *virt;
+	dma_addr_t phys;
+} dbell_ring;
+
+static struct rio_msg_tx_ring {
+	void *virt;
+	dma_addr_t phys;
+	void *virt_buffer[RIO_MAX_TX_RING_SIZE];
+	dma_addr_t phys_buffer[RIO_MAX_TX_RING_SIZE];
+	int tx_slot;
+	int size;
+} msg_tx_ring;
+
+static struct rio_msg_rx_ring {
+	void *virt;
+	dma_addr_t phys;
+	void *virt_buffer[RIO_MAX_RX_RING_SIZE];
+	int rx_slot;
+	int size;
+} msg_rx_ring;
+
+/**
+ * mpc85xx_rio_doorbell_send - Send a MPC85xx doorbell message
+ * @index: ID of RapidIO interface
+ * @destid: Destination ID of target device
+ * @data: 16-bit info field of RapidIO doorbell message
+ *
+ * Sends a MPC85xx doorbell message. Returns %0 on success or
+ * %-EINVAL on failure.
+ */
+static int mpc85xx_rio_doorbell_send(int index, u16 destid, u16 data)
+{
+	pr_debug("mpc85xx_doorbell_send: index %d destid %4.4x data %4.4x\n",
+		 index, destid, data);
+	out_be32((void *)&dbell_atmu_regs->rowtar, destid << 22);
+	out_be16((void *)(dbell_win), data);
+
+	return 0;
+}
+
+/**
+ * mpc85xx_local_config_read - Generate a MPC85xx local config space read
+ * @index: ID of RapdiIO interface
+ * @offset: Offset into configuration space
+ * @len: Length (in bytes) of the maintenance transaction
+ * @data: Value to be read into
+ *
+ * Generates a MPC85xx local configuration space read. Returns %0 on
+ * success or %-EINVAL on failure.
+ */
+static int mpc85xx_local_config_read(int index, u32 offset, int len, u32 * data)
+{
+	pr_debug("mpc85xx_local_config_read: index %d offset %8.8x\n", index,
+		 offset);
+	*data = in_be32((void *)(regs_win + offset));
+
+	return 0;
+}
+
+/**
+ * mpc85xx_local_config_write - Generate a MPC85xx local config space write
+ * @index: ID of RapdiIO interface
+ * @offset: Offset into configuration space
+ * @len: Length (in bytes) of the maintenance transaction
+ * @data: Value to be written
+ *
+ * Generates a MPC85xx local configuration space write. Returns %0 on
+ * success or %-EINVAL on failure.
+ */
+static int mpc85xx_local_config_write(int index, u32 offset, int len, u32 data)
+{
+	pr_debug
+	    ("mpc85xx_local_config_write: index %d offset %8.8x data %8.8x\n",
+	     index, offset, data);
+	out_be32((void *)(regs_win + offset), data);
+
+	return 0;
+}
+
+/**
+ * mpc85xx_rio_config_read - Generate a MPC85xx read maintenance transaction
+ * @index: ID of RapdiIO interface
+ * @destid: Destination ID of transaction
+ * @hopcount: Number of hops to target device
+ * @offset: Offset into configuration space
+ * @len: Length (in bytes) of the maintenance transaction
+ * @val: Location to be read into
+ *
+ * Generates a MPC85xx read maintenance transaction. Returns %0 on
+ * success or %-EINVAL on failure.
+ */
+static int
+mpc85xx_rio_config_read(int index, u16 destid, u8 hopcount, u32 offset, int len,
+			u32 * val)
+{
+	u8 *data;
+
+	pr_debug
+	    ("mpc85xx_rio_config_read: index %d destid %d hopcount %d offset %8.8x len %d\n",
+	     index, destid, hopcount, offset, len);
+	out_be32((void *)&maint_atmu_regs->rowtar,
+		 (destid << 22) | (hopcount << 12) | ((offset & ~0x3) >> 9));
+
+	data = (u8 *) maint_win + offset;
+	switch (len) {
+	case 1:
+		*val = in_8((u8 *) data);
+		break;
+	case 2:
+		*val = in_be16((u16 *) data);
+		break;
+	default:
+		*val = in_be32((u32 *) data);
+		break;
+	}
+
+	return 0;
+}
+
+/**
+ * mpc85xx_rio_config_write - Generate a MPC85xx write maintenance transaction
+ * @index: ID of RapdiIO interface
+ * @destid: Destination ID of transaction
+ * @hopcount: Number of hops to target device
+ * @offset: Offset into configuration space
+ * @len: Length (in bytes) of the maintenance transaction
+ * @val: Value to be written
+ *
+ * Generates an MPC85xx write maintenance transaction. Returns %0 on
+ * success or %-EINVAL on failure.
+ */
+static int
+mpc85xx_rio_config_write(int index, u16 destid, u8 hopcount, u32 offset,
+			 int len, u32 val)
+{
+	u8 *data;
+	pr_debug
+	    ("mpc85xx_rio_config_write: index %d destid %d hopcount %d offset %8.8x len %d val %8.8x\n",
+	     index, destid, hopcount, offset, len, val);
+	out_be32((void *)&maint_atmu_regs->rowtar,
+		 (destid << 22) | (hopcount << 12) | ((offset & ~0x3) >> 9));
+
+	data = (u8 *) maint_win + offset;
+	switch (len) {
+	case 1:
+		out_8((u8 *) data, val);
+		break;
+	case 2:
+		out_be16((u16 *) data, val);
+		break;
+	default:
+		out_be32((u32 *) data, val);
+		break;
+	}
+
+	return 0;
+}
+
+/**
+ * rio_hw_add_outb_message - Add message to the MPC85xx outbound message queue
+ * @mport: Master port with outbound message queue
+ * @rdev: Target of outbound message
+ * @mbox: Outbound mailbox
+ * @buffer: Message to add to outbound queue
+ * @len: Length of message
+ *
+ * Adds the @buffer message to the MPC85xx outbound message queue. Returns
+ * %0 on success or %-EINVAL on failure.
+ */
+int
+rio_hw_add_outb_message(struct rio_mport *mport, struct rio_dev *rdev, int mbox,
+			void *buffer, size_t len)
+{
+	u32 omr;
+	struct rio_tx_desc *desc =
+	    (struct rio_tx_desc *)msg_tx_ring.virt + msg_tx_ring.tx_slot;
+	int ret = 0;
+
+	pr_debug(KERN_INFO
+		 "RIO: rio_hw_add_outb_message(): destid %4.4x mbox %d buffer %8.8x len %8.8x\n",
+		 rdev->destid, mbox, (int)buffer, len);
+
+	if ((len < 8) || (len > RIO_MAX_MSG_SIZE)) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	/* Copy and clear rest of buffer */
+	memcpy(msg_tx_ring.virt_buffer[msg_tx_ring.tx_slot], buffer, len);
+	if (len < (RIO_MAX_MSG_SIZE - 4))
+		memset((void *)((u32) msg_tx_ring.
+				virt_buffer[msg_tx_ring.tx_slot] + len), 0,
+		       RIO_MAX_MSG_SIZE - len);
+
+	/* Set mbox field for message */
+	desc->dport = mbox & 0x3;
+
+	/* Enable EOMI interrupt, set priority, and set destid */
+	desc->dattr = 0x28000000 | (rdev->destid << 2);
+
+	/* Set transfer size aligned to next power of 2 (in double words) */
+	desc->dwcnt = is_power_of_2(len) ? len : 1 << get_bitmask_order(len);
+
+	/* Set snooping and source buffer address */
+	desc->saddr = 0x00000004 | msg_tx_ring.phys_buffer[msg_tx_ring.tx_slot];
+
+	/* Increment enqueue pointer */
+	omr = in_be32((void *)&msg_regs->omr);
+	out_be32((void *)&msg_regs->omr, omr | RIO_MSG_OMR_MUI);
+
+	/* Go to next descriptor */
+	if (++msg_tx_ring.tx_slot == msg_tx_ring.size)
+		msg_tx_ring.tx_slot = 0;
+
+      out:
+	return ret;
+}
+
+EXPORT_SYMBOL(rio_hw_add_outb_message);
+
+/**
+ * mpc85xx_rio_tx_handler - MPC85xx outbound message interrupt handler
+ * @irq: Linux interrupt number
+ * @dev_instance: Pointer to interrupt-specific data
+ * @regs: Register context
+ *
+ * Handles outbound message interrupts. Executes a register outbound
+ * mailbox event handler and acks the interrupt occurence.
+ */
+static irqreturn_t
+mpc85xx_rio_tx_handler(int irq, void *dev_instance, struct pt_regs *regs)
+{
+	int osr;
+	struct rio_mport *port = (struct rio_mport *)dev_instance;
+
+	osr = in_be32((void *)&msg_regs->osr);
+
+	if (osr & RIO_MSG_OSR_TE) {
+		printk(KERN_INFO "RIO: outbound message transmission error\n");
+		out_be32((void *)&msg_regs->osr, RIO_MSG_OSR_TE);
+		goto out;
+	}
+
+	if (osr & RIO_MSG_OSR_QOI) {
+		printk(KERN_INFO "RIO: outbound message queue overflow\n");
+		out_be32((void *)&msg_regs->osr, RIO_MSG_OSR_QOI);
+		goto out;
+	}
+
+	if (osr & RIO_MSG_OSR_EOMI) {
+		u32 dqp = in_be32((void *)&msg_regs->odqdpar);
+		int slot = (dqp - msg_tx_ring.phys) >> 5;
+		port->outb_msg[0].mcback(port, -1, slot);
+
+		/* Ack the end-of-message interrupt */
+		out_be32((void *)&msg_regs->osr, RIO_MSG_OSR_EOMI);
+	}
+
+      out:
+	return IRQ_HANDLED;
+}
+
+/**
+ * rio_open_outb_mbox - Initialize MPC85xx outbound mailbox
+ * @mport: Master port implementing the outbound message unit
+ * @mbox: Mailbox to open
+ * @entries: Number of entries in the outbound mailbox ring
+ *
+ * Initializes buffer ring, request the outbound message interrupt,
+ * and enables the outbound message unit. Returns %0 on success or
+ * %-EINVAL on failure.
+ */
+int rio_open_outb_mbox(struct rio_mport *mport, int mbox, int entries)
+{
+	int i, rc = 0;
+
+	if ((entries < RIO_MIN_TX_RING_SIZE) ||
+	    (entries > RIO_MAX_TX_RING_SIZE) || (!is_power_of_2(entries))) {
+		rc = -EINVAL;
+		goto out;
+	}
+
+	/* Initialize shadow copy ring */
+	msg_tx_ring.size = entries;
+
+	for (i = 0; i < msg_tx_ring.size; i++) {
+		msg_tx_ring.virt_buffer[i] =
+		    (void *)__get_free_page(GFP_KERNEL);
+		msg_tx_ring.phys_buffer[i] =
+		    (dma_addr_t) __pa(msg_tx_ring.virt_buffer[i]);
+	}
+
+	/* Initialize outbound message descriptor ring */
+	msg_tx_ring.virt = dma_alloc_coherent(NULL,
+					      msg_tx_ring.size *
+					      RIO_MSG_DESC_SIZE,
+					      &msg_tx_ring.phys, GFP_KERNEL);
+	memset(msg_tx_ring.virt, 0, msg_tx_ring.size * RIO_MSG_DESC_SIZE);
+	msg_tx_ring.tx_slot = 0;
+
+	/* Point dequeue/enqueue pointers at first entry in ring */
+	out_be32((void *)&msg_regs->odqdpar, msg_tx_ring.phys);
+	out_be32((void *)&msg_regs->odqepar, msg_tx_ring.phys);
+
+	/* Configure for snooping */
+	out_be32((void *)&msg_regs->osar, 0x00000004);
+
+	/* Clear interrupt status */
+	out_be32((void *)&msg_regs->osr, 0x000000b3);
+
+	/* Hook up outbound message handler */
+	request_irq(MPC85xx_IRQ_RIO_TX, mpc85xx_rio_tx_handler, 0, "msg_tx",
+		    (void *)mport);
+
+	/*
+	 * Configure outbound message unit
+	 *      Snooping
+	 *      Interrupts (all enabled, except QEIE)
+	 *      Chaining mode
+	 *      Disable
+	 */
+	out_be32((void *)&msg_regs->omr, 0x00100220);
+
+	/* Set number of entries */
+	out_be32((void *)&msg_regs->omr,
+		 in_be32((void *)&msg_regs->omr) |
+		 ((get_bitmask_order(entries) - 2) << 12));
+
+	/* Now enable the unit */
+	out_be32((void *)&msg_regs->omr, in_be32((void *)&msg_regs->omr) | 0x1);
+
+      out:
+	return rc;
+}
+
+/**
+ * rio_close_outb_mbox - Shut down MPC85xx outbound mailbox
+ * @mport: Master port implementing the outbound message unit
+ * @mbox: Mailbox to close
+ *
+ * Disables the outbound message unit, free all buffers, and
+ * frees the outbound message interrupt.
+ */
+void rio_close_outb_mbox(struct rio_mport *mport, int mbox)
+{
+	/* Disable inbound message unit */
+	out_be32((void *)&msg_regs->omr, 0);
+
+	/* Free ring */
+	dma_free_coherent(NULL, msg_tx_ring.size * RIO_MSG_DESC_SIZE,
+			  msg_tx_ring.virt, msg_tx_ring.phys);
+
+	/* Free interrupt */
+	free_irq(MPC85xx_IRQ_RIO_TX, (void *)mport);
+}
+
+/**
+ * mpc85xx_rio_rx_handler - MPC85xx inbound message interrupt handler
+ * @irq: Linux interrupt number
+ * @dev_instance: Pointer to interrupt-specific data
+ * @regs: Register context
+ *
+ * Handles inbound message interrupts. Executes a registered inbound
+ * mailbox event handler and acks the interrupt occurence.
+ */
+static irqreturn_t
+mpc85xx_rio_rx_handler(int irq, void *dev_instance, struct pt_regs *regs)
+{
+	int isr;
+	struct rio_mport *port = (struct rio_mport *)dev_instance;
+
+	isr = in_be32((void *)&msg_regs->isr);
+
+	if (isr & RIO_MSG_ISR_TE) {
+		printk(KERN_INFO "RIO: inbound message reception error\n");
+		out_be32((void *)&msg_regs->isr, RIO_MSG_ISR_TE);
+		goto out;
+	}
+
+	/* XXX Need to check/dispatch until queue empty */
+	if (isr & RIO_MSG_ISR_DIQI) {
+		/*
+		 * We implement *only* mailbox 0, but can receive messages
+		 * for any mailbox/letter to that mailbox destination. So,
+		 * make the callback with an unknown/invalid mailbox number
+		 * argument.
+		 */
+		port->inb_msg[0].mcback(port, -1, -1);
+
+		/* Ack the queueing interrupt */
+		out_be32((void *)&msg_regs->isr, RIO_MSG_ISR_DIQI);
+	}
+
+      out:
+	return IRQ_HANDLED;
+}
+
+/**
+ * rio_open_inb_mbox - Initialize MPC85xx inbound mailbox
+ * @mport: Master port implementing the inbound message unit
+ * @mbox: Mailbox to open
+ * @entries: Number of entries in the inbound mailbox ring
+ *
+ * Initializes buffer ring, request the inbound message interrupt,
+ * and enables the inbound message unit. Returns %0 on success
+ * or %-EINVAL on failure.
+ */
+int rio_open_inb_mbox(struct rio_mport *mport, int mbox, int entries)
+{
+	int i, rc = 0;
+
+	if ((entries < RIO_MIN_RX_RING_SIZE) ||
+	    (entries > RIO_MAX_RX_RING_SIZE) || (!is_power_of_2(entries))) {
+		rc = -EINVAL;
+		goto out;
+	}
+
+	/* Initialize client buffer ring */
+	msg_rx_ring.size = entries;
+	msg_rx_ring.rx_slot = 0;
+	for (i = 0; i < msg_rx_ring.size; i++)
+		msg_rx_ring.virt_buffer[i] = NULL;
+
+	/* Initialize inbound message ring */
+	msg_rx_ring.virt = dma_alloc_coherent(NULL,
+					      msg_rx_ring.size *
+					      RIO_MAX_MSG_SIZE,
+					      &msg_rx_ring.phys, GFP_KERNEL);
+
+	/* Point dequeue/enqueue pointers at first entry in ring */
+	out_be32((void *)&msg_regs->ifqdpar, (u32) msg_rx_ring.phys);
+	out_be32((void *)&msg_regs->ifqepar, (u32) msg_rx_ring.phys);
+
+	/* Clear interrupt status */
+	out_be32((void *)&msg_regs->isr, 0x00000091);
+
+	/* Hook up inbound message handler */
+	request_irq(MPC85xx_IRQ_RIO_RX, mpc85xx_rio_rx_handler, 0, "msg_rx",
+		    (void *)mport);
+
+	/*
+	 * Configure inbound message unit:
+	 *      Snooping
+	 *      4KB max message size
+	 *      Unmask all interrupt sources
+	 *      Disable
+	 */
+	out_be32((void *)&msg_regs->imr, 0x001b0060);
+
+	/* Set number of queue entries */
+	out_be32((void *)&msg_regs->imr,
+		 in_be32((void *)&msg_regs->imr) |
+		 ((get_bitmask_order(entries) - 2) << 12));
+
+	/* Now enable the unit */
+	out_be32((void *)&msg_regs->imr, in_be32((void *)&msg_regs->imr) | 0x1);
+
+      out:
+	return rc;
+}
+
+/**
+ * rio_close_inb_mbox - Shut down MPC85xx inbound mailbox
+ * @mport: Master port implementing the inbound message unit
+ * @mbox: Mailbox to close
+ *
+ * Disables the inbound message unit, free all buffers, and
+ * frees the inbound message interrupt.
+ */
+void rio_close_inb_mbox(struct rio_mport *mport, int mbox)
+{
+	/* Disable inbound message unit */
+	out_be32((void *)&msg_regs->imr, 0);
+
+	/* Free ring */
+	dma_free_coherent(NULL, msg_rx_ring.size * RIO_MAX_MSG_SIZE,
+			  msg_rx_ring.virt, msg_rx_ring.phys);
+
+	/* Free interrupt */
+	free_irq(MPC85xx_IRQ_RIO_RX, (void *)mport);
+}
+
+/**
+ * rio_hw_add_inb_buffer - Add buffer to the MPC85xx inbound message queue
+ * @mport: Master port implementing the inbound message unit
+ * @mbox: Inbound mailbox number
+ * @buf: Buffer to add to inbound queue
+ *
+ * Adds the @buf buffer to the MPC85xx inbound message queue. Returns
+ * %0 on success or %-EINVAL on failure.
+ */
+int rio_hw_add_inb_buffer(struct rio_mport *mport, int mbox, void *buf)
+{
+	int rc = 0;
+
+	pr_debug("RIO: rio_hw_add_inb_buffer(), msg_rx_ring.rx_slot %d\n",
+		 msg_rx_ring.rx_slot);
+
+	if (msg_rx_ring.virt_buffer[msg_rx_ring.rx_slot]) {
+		printk(KERN_ERR
+		       "RIO: error adding inbound buffer %d, buffer exists\n",
+		       msg_rx_ring.rx_slot);
+		rc = -EINVAL;
+		goto out;
+	}
+
+	msg_rx_ring.virt_buffer[msg_rx_ring.rx_slot] = buf;
+	if (++msg_rx_ring.rx_slot == msg_rx_ring.size)
+		msg_rx_ring.rx_slot = 0;
+
+      out:
+	return rc;
+}
+
+EXPORT_SYMBOL(rio_hw_add_inb_buffer);
+
+/**
+ * rio_hw_get_inb_message - Fetch inbound message from the MPC85xx message unit
+ * @mport: Master port implementing the inbound message unit
+ * @mbox: Inbound mailbox number
+ *
+ * Gets the next available inbound message from the inbound message queue.
+ * A pointer to the message is returned on success or NULL on failure.
+ */
+void *rio_hw_get_inb_message(struct rio_mport *mport, int mbox)
+{
+	u32 imr;
+	u32 phys_buf, virt_buf;
+	void *buf = NULL;
+	int buf_idx;
+
+	phys_buf = in_be32((void *)&msg_regs->ifqdpar);
+
+	/* If no more messages, then bail out */
+	if (phys_buf == in_be32((void *)&msg_regs->ifqepar))
+		goto out2;
+
+	virt_buf = (u32) msg_rx_ring.virt + (phys_buf - msg_rx_ring.phys);
+	buf_idx = (phys_buf - msg_rx_ring.phys) / RIO_MAX_MSG_SIZE;
+	buf = msg_rx_ring.virt_buffer[buf_idx];
+
+	if (!buf) {
+		pr_debug(KERN_ERR
+			 "RIO: inbound message copy failed, no buffers\n");
+		goto out1;
+	}
+
+	/* Copy max message size, caller is expected to allocate that big */
+	memcpy(buf, (void *)virt_buf, RIO_MAX_MSG_SIZE);
+
+	/* Clear the available buffer */
+	msg_rx_ring.virt_buffer[buf_idx] = NULL;
+
+      out1:
+	imr = in_be32((void *)&msg_regs->imr);
+	out_be32((void *)&msg_regs->imr, imr | RIO_MSG_IMR_MI);
+
+      out2:
+	return buf;
+}
+
+EXPORT_SYMBOL(rio_hw_get_inb_message);
+
+/**
+ * mpc85xx_rio_dbell_handler - MPC85xx doorbell interrupt handler
+ * @irq: Linux interrupt number
+ * @dev_instance: Pointer to interrupt-specific data
+ * @regs: Register context
+ *
+ * Handles doorbell interrupts. Parses a list of registered
+ * doorbell event handlers and executes a matching event handler.
+ */
+static irqreturn_t
+mpc85xx_rio_dbell_handler(int irq, void *dev_instance, struct pt_regs *regs)
+{
+	int dsr;
+	struct rio_mport *port = (struct rio_mport *)dev_instance;
+
+	dsr = in_be32((void *)&msg_regs->dsr);
+
+	if (dsr & DOORBELL_DSR_TE) {
+		printk(KERN_INFO "RIO: doorbell reception error\n");
+		out_be32((void *)&msg_regs->dsr, DOORBELL_DSR_TE);
+		goto out;
+	}
+
+	if (dsr & DOORBELL_DSR_QFI) {
+		printk(KERN_INFO "RIO: doorbell queue full\n");
+		out_be32((void *)&msg_regs->dsr, DOORBELL_DSR_QFI);
+		goto out;
+	}
+
+	/* XXX Need to check/dispatch until queue empty */
+	if (dsr & DOORBELL_DSR_DIQI) {
+		u32 dmsg =
+		    (u32) dbell_ring.virt +
+		    (in_be32((void *)&msg_regs->dqdpar) & 0xfff);
+		u32 dmr;
+		struct rio_dbell *dbell;
+		int found = 0;
+
+		pr_debug(KERN_INFO
+			 "RIO: processing doorbell, sid %2.2x tid %2.2x info %4.4x\n",
+			 DBELL_SID(dmsg), DBELL_TID(dmsg), DBELL_INF(dmsg));
+
+		list_for_each_entry(dbell, &port->dbells, node) {
+			if ((dbell->res->start <= DBELL_INF(dmsg)) &&
+			    (dbell->res->end >= DBELL_INF(dmsg))) {
+				found = 1;
+				break;
+			}
+		}
+		if (found) {
+			dbell->dinb(port, DBELL_SID(dmsg), DBELL_TID(dmsg),
+				    DBELL_INF(dmsg));
+		} else {
+			pr_debug(KERN_INFO
+				 "RIO: spurious doorbell, sid %2.2x tid %2.2x info %4.4x\n",
+				 DBELL_SID(dmsg), DBELL_TID(dmsg),
+				 DBELL_INF(dmsg));
+		}
+		dmr = in_be32((void *)&msg_regs->dmr);
+		out_be32((void *)&msg_regs->dmr, dmr | DOORBELL_DMR_DI);
+		out_be32((void *)&msg_regs->dsr, DOORBELL_DSR_DIQI);
+	}
+
+      out:
+	return IRQ_HANDLED;
+}
+
+/**
+ * mpc85xx_rio_doorbell_init - MPC85xx doorbell interface init
+ * @mport: Master port implementing the inbound doorbell unit
+ *
+ * Initializes doorbell unit hardware and inbound DMA buffer
+ * ring. Called from mpc85xx_rio_setup().
+ */
+static void mpc85xx_rio_doorbell_init(struct rio_mport *mport)
+{
+	/* Map outbound doorbell window immediately after maintenance window */
+	dbell_win =
+	    (u32) ioremap(mport->iores.start + RIO_MAINT_WIN_SIZE,
+			  RIO_DBELL_WIN_SIZE);
+
+	/* Initialize inbound doorbells */
+	dbell_ring.virt = dma_alloc_coherent(NULL,
+					     512 * DOORBELL_MESSAGE_SIZE,
+					     &dbell_ring.phys, GFP_KERNEL);
+
+	/* Point dequeue/enqueue pointers at first entry in ring */
+	out_be32((void *)&msg_regs->dqdpar, (u32) dbell_ring.phys);
+	out_be32((void *)&msg_regs->dqepar, (u32) dbell_ring.phys);
+
+	/* Clear interrupt status */
+	out_be32((void *)&msg_regs->dsr, 0x00000091);
+
+	/* Hook up doorbell handler */
+	request_irq(MPC85xx_IRQ_RIO_BELL, mpc85xx_rio_dbell_handler, 0,
+		    "dbell_rx", (void *)mport);
+
+	/* Configure doorbells for snooping, 512 entries, and enable */
+	out_be32((void *)&msg_regs->dmr, 0x00108161);
+}
+
+static char *cmdline = NULL;
+
+static int mpc85xx_rio_get_hdid(int index)
+{
+	/* XXX Need to parse multiple entries in some format */
+	if (!cmdline)
+		return -1;
+
+	return simple_strtol(cmdline, NULL, 0);
+}
+
+static int mpc85xx_rio_get_cmdline(char *s)
+{
+	if (!s)
+		return 0;
+
+	cmdline = s;
+	return 1;
+}
+
+__setup("riohdid=", mpc85xx_rio_get_cmdline);
+
+/**
+ * mpc85xx_rio_setup - Setup MPC85xx RapidIO interface
+ * @law_start: Starting physical address of RapidIO LAW
+ * @law_size: Size of RapidIO LAW
+ *
+ * Initializes MPC85xx RapidIO hardware interface, configures
+ * master port with system-specific info, and registers the
+ * master port with the RapidIO subsystem.
+ */
+void mpc85xx_rio_setup(int law_start, int law_size)
+{
+	struct rio_ops *ops;
+	struct rio_mport *port;
+
+	ops = kmalloc(sizeof(struct rio_ops), GFP_KERNEL);
+	ops->lcread = mpc85xx_local_config_read;
+	ops->lcwrite = mpc85xx_local_config_write;
+	ops->cread = mpc85xx_rio_config_read;
+	ops->cwrite = mpc85xx_rio_config_write;
+	ops->dsend = mpc85xx_rio_doorbell_send;
+
+	port = kmalloc(sizeof(struct rio_mport), GFP_KERNEL);
+	port->id = 0;
+	port->index = 0;
+	INIT_LIST_HEAD(&port->dbells);
+	port->iores.start = law_start;
+	port->iores.end = law_start + law_size;
+	port->iores.flags = IORESOURCE_MEM;
+
+	rio_init_dbell_res(&port->riores[RIO_DOORBELL_RESOURCE], 0, 0xffff);
+	rio_init_mbox_res(&port->riores[RIO_INB_MBOX_RESOURCE], 0, 0);
+	rio_init_mbox_res(&port->riores[RIO_OUTB_MBOX_RESOURCE], 0, 0);
+	strcpy(port->name, "RIO0 mport");
+
+	port->ops = ops;
+	port->host_deviceid = mpc85xx_rio_get_hdid(port->id);
+
+	rio_register_mport(port);
+
+	regs_win = (u32) ioremap(RIO_REGS_BASE, 0x20000);
+	atmu_regs = (struct rio_atmu_regs *)(regs_win + RIO_ATMU_REGS_OFFSET);
+	maint_atmu_regs = atmu_regs + 1;
+	dbell_atmu_regs = atmu_regs + 2;
+	msg_regs = (struct rio_msg_regs *)(regs_win + RIO_MSG_REGS_OFFSET);
+
+	/* Configure maintenance transaction window */
+	out_be32((void *)&maint_atmu_regs->rowbar, 0x000c0000);
+	out_be32((void *)&maint_atmu_regs->rowar, 0x80077015);
+
+	maint_win = (u32) ioremap(law_start, RIO_MAINT_WIN_SIZE);
+
+	/* Configure outbound doorbell window */
+	out_be32((void *)&dbell_atmu_regs->rowbar, 0x000c0400);
+	out_be32((void *)&dbell_atmu_regs->rowar, 0x8004200b);
+	mpc85xx_rio_doorbell_init(port);
+}
Index: arch/ppc/syslib/ppc85xx_rio.h
===================================================================
--- /dev/null  (tree:750e10a6553cacbd2b92b52fe40afdc8062f4f78)
+++ f0bf7810dbe8c4073832d6c3785364084e9523a7/arch/ppc/syslib/ppc85xx_rio.h  (mode:100644)
@@ -0,0 +1,21 @@
+/*
+ * MPC85xx RapidIO definitions
+ *
+ * Copyright 2005 MontaVista Software, Inc.
+ * Matt Porter <mporter@kernel.crashing.org>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#ifndef __PPC_SYSLIB_PPC85XX_RIO_H
+#define __PPC_SYSLIB_PPC85XX_RIO_H
+
+#include <linux/config.h>
+#include <linux/init.h>
+
+extern void mpc85xx_rio_setup(int law_start, int law_size);
+
+#endif				/* __PPC_SYSLIB_PPC85XX_RIO_H */
Index: include/asm-ppc/rio.h
===================================================================
--- /dev/null  (tree:750e10a6553cacbd2b92b52fe40afdc8062f4f78)
+++ f0bf7810dbe8c4073832d6c3785364084e9523a7/include/asm-ppc/rio.h  (mode:100644)
@@ -0,0 +1,18 @@
+/*
+ * RapidIO architecture support
+ *
+ * Copyright 2005 MontaVista Software, Inc.
+ * Matt Porter <mporter@kernel.crashing.org>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#ifndef ASM_PPC_RIO_H
+#define ASM_PPC_RIO_H
+
+extern void platform_rio_init(void);
+
+#endif				/* ASM_PPC_RIO_H */

[PATCH][3/3] RapidIO support: net driver over messaging

[Matt Porter]

Adds an "Ethernet" driver which sends Ethernet packets over the
standard RapidIO messaging. This depends on the core RIO
patch for mailbox/doorbell access.

Signed-off-by: Matt Porter <mporter@kernel.crashing.org>

Index: drivers/net/Kconfig
===================================================================
--- f0bf7810dbe8c4073832d6c3785364084e9523a7/drivers/net/Kconfig  (mode:100644)
+++ 4ed27b6e30a69f314a2ca131e80ac45e2111f245/drivers/net/Kconfig  (mode:100644)
@@ -2185,6 +2185,20 @@
 	tristate "iSeries Virtual Ethernet driver support"
 	depends on NETDEVICES && PPC_ISERIES
 
+config RIONET
+	tristate "RapidIO Ethernet over messaging driver support"
+	depends on NETDEVICES && RAPIDIO
+
+config RIONET_TX_SIZE
+	int "Number of outbound queue entries"
+	depends on RIONET
+	default "128"
+
+config RIONET_RX_SIZE
+	int "Number of inbound queue entries"
+	depends on RIONET
+	default "128"
+
 config FDDI
 	bool "FDDI driver support"
 	depends on NETDEVICES && (PCI || EISA)
Index: drivers/net/Makefile
===================================================================
--- f0bf7810dbe8c4073832d6c3785364084e9523a7/drivers/net/Makefile  (mode:100644)
+++ 4ed27b6e30a69f314a2ca131e80ac45e2111f245/drivers/net/Makefile  (mode:100644)
@@ -58,6 +58,7 @@
 obj-$(CONFIG_VIA_RHINE) += via-rhine.o
 obj-$(CONFIG_VIA_VELOCITY) += via-velocity.o
 obj-$(CONFIG_ADAPTEC_STARFIRE) += starfire.o
+obj-$(CONFIG_RIONET) += rionet.o
 
 #
 # end link order section
Index: drivers/net/rionet.c
===================================================================
--- /dev/null  (tree:f0bf7810dbe8c4073832d6c3785364084e9523a7)
+++ 4ed27b6e30a69f314a2ca131e80ac45e2111f245/drivers/net/rionet.c  (mode:100644)
@@ -0,0 +1,622 @@
+/*
+ * rionet - Ethernet driver over RapidIO messaging services
+ *
+ * Copyright 2005 MontaVista Software, Inc.
+ * Matt Porter <mporter@kernel.crashing.org>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/dma-mapping.h>
+#include <linux/delay.h>
+#include <linux/rio.h>
+#include <linux/rio_drv.h>
+#include <linux/rio_ids.h>
+
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/crc32.h>
+#include <linux/ethtool.h>
+
+#define DRV_NAME        "rionet"
+#define DRV_VERSION     "0.1"
+#define DRV_AUTHOR      "Matt Porter <mporter@kernel.crashing.org>"
+#define DRV_DESC        "Ethernet over RapidIO"
+
+MODULE_AUTHOR(DRV_AUTHOR);
+MODULE_DESCRIPTION(DRV_DESC);
+MODULE_LICENSE("GPL");
+
+#define RIONET_DEFAULT_MSGLEVEL	0
+#define RIONET_DOORBELL_JOIN	0x1000
+#define RIONET_DOORBELL_LEAVE	0x1001
+
+#define RIONET_MAILBOX		0
+
+#define RIONET_TX_RING_SIZE	CONFIG_RIONET_TX_SIZE
+#define RIONET_RX_RING_SIZE	CONFIG_RIONET_RX_SIZE
+
+LIST_HEAD(rionet_peers);
+
+struct rionet_private {
+	struct rio_mport *mport;
+	struct sk_buff *rx_skb[RIONET_RX_RING_SIZE];
+	struct sk_buff *tx_skb[RIONET_TX_RING_SIZE];
+	struct net_device_stats stats;
+	int rx_slot;
+	int tx_slot;
+	int tx_cnt;
+	int ack_slot;
+	spinlock_t lock;
+	u32 msg_enable;
+};
+
+struct rionet_peer {
+	struct list_head node;
+	struct rio_dev *rdev;
+	struct resource *res;
+};
+
+static int rionet_check = 0;
+static int rionet_capable = 1;
+static struct net_device *sndev = NULL;
+
+/*
+ * This is a fast lookup table for for translating TX
+ * Ethernet packets into a destination RIO device. It
+ * could be made into a hash table to save memory depending
+ * on system trade-offs.
+ */
+static struct rio_dev *rionet_active[RIO_MAX_ROUTE_ENTRIES];
+
+#define is_rionet_capable(pef, src_ops, dst_ops)		\
+			((pef & RIO_PEF_INB_MBOX) &&		\
+			 (pef & RIO_PEF_INB_DOORBELL) &&	\
+			 (src_ops & RIO_SRC_OPS_DOORBELL) &&	\
+			 (dst_ops & RIO_DST_OPS_DOORBELL))
+#define dev_rionet_capable(dev) \
+	is_rionet_capable(dev->pef, dev->src_ops, dev->dst_ops)
+
+#define RIONET_MAC_MATCH(x)	(*(u32 *)x == 0x00010001)
+#define RIONET_GET_DESTID(x)	(*(u16 *)(x + 4))
+
+static struct net_device_stats *rionet_stats(struct net_device *ndev)
+{
+	struct rionet_private *rnet = ndev->priv;
+	return &rnet->stats;
+}
+
+static int rionet_rx_clean(struct net_device *ndev)
+{
+	int i;
+	int error = 0;
+	struct rionet_private *rnet = ndev->priv;
+	void *data;
+
+	i = rnet->rx_slot;
+
+	do {
+		if (!rnet->rx_skb[i]) {
+			rnet->stats.rx_dropped++;
+			continue;
+		}
+
+		if (!(data = rio_get_inb_message(rnet->mport, RIONET_MAILBOX)))
+			break;
+
+		rnet->rx_skb[i]->data = data;
+		skb_put(rnet->rx_skb[i], RIO_MAX_MSG_SIZE);
+		rnet->rx_skb[i]->dev = sndev;
+		rnet->rx_skb[i]->protocol =
+		    eth_type_trans(rnet->rx_skb[i], sndev);
+		error = netif_rx(rnet->rx_skb[i]);
+
+		if (error == NET_RX_DROP) {
+			rnet->stats.rx_dropped++;
+		} else if (error == NET_RX_BAD) {
+			if (netif_msg_rx_err(rnet))
+				printk(KERN_WARNING "%s: bad rx packet\n",
+				       DRV_NAME);
+			rnet->stats.rx_errors++;
+		} else {
+			rnet->stats.rx_packets++;
+			rnet->stats.rx_bytes += RIO_MAX_MSG_SIZE;
+		}
+
+	} while ((i = (i + 1) % RIONET_RX_RING_SIZE) != rnet->rx_slot);
+
+	return i;
+}
+
+static void rionet_rx_fill(struct net_device *ndev, int end)
+{
+	int i;
+	struct rionet_private *rnet = ndev->priv;
+
+	i = rnet->rx_slot;
+	do {
+		rnet->rx_skb[i] = dev_alloc_skb(RIO_MAX_MSG_SIZE);
+
+		if (!rnet->rx_skb[i])
+			break;
+
+		rio_add_inb_buffer(rnet->mport, RIONET_MAILBOX,
+				   rnet->rx_skb[i]->data);
+	} while ((i = (i + 1) % RIONET_RX_RING_SIZE) != end);
+
+	rnet->rx_slot = i;
+}
+
+static int rionet_queue_tx_msg(struct sk_buff *skb, struct net_device *ndev,
+			       struct rio_dev *rdev)
+{
+	struct rionet_private *rnet = ndev->priv;
+
+	rio_add_outb_message(rnet->mport, rdev, 0, skb->data, skb->len);
+	rnet->tx_skb[rnet->tx_slot] = skb;
+
+	rnet->stats.tx_packets++;
+	rnet->stats.tx_bytes += skb->len;
+
+	if (++rnet->tx_cnt == RIONET_TX_RING_SIZE)
+		netif_stop_queue(ndev);
+
+	if (++rnet->tx_slot == RIONET_TX_RING_SIZE)
+		rnet->tx_slot = 0;
+
+	if (netif_msg_tx_queued(rnet))
+		printk(KERN_INFO "%s: queued skb %8.8x len %8.8x\n", DRV_NAME,
+		       (u32) skb, skb->len);
+
+	return 0;
+}
+
+static int rionet_start_xmit(struct sk_buff *skb, struct net_device *ndev)
+{
+	int i;
+	struct rionet_private *rnet = ndev->priv;
+	struct ethhdr *eth = (struct ethhdr *)skb->data;
+	u16 destid;
+
+	spin_lock_irq(&rnet->lock);
+
+	if ((rnet->tx_cnt + 1) > RIONET_TX_RING_SIZE) {
+		netif_stop_queue(ndev);
+		spin_unlock_irq(&rnet->lock);
+		return -EBUSY;
+	}
+
+	if (eth->h_dest[0] & 0x01) {
+		/*
+		 * XXX Need to delay queuing if ring max is reached,
+		 * flush additional packets in tx_event() before
+		 * awakening the queue. We can easily exceed ring
+		 * size with a large number of nodes or even a
+		 * small number where the ring is relatively full
+		 * on entrance to hard_start_xmit.
+		 */
+		for (i = 0; i < RIO_MAX_ROUTE_ENTRIES; i++)
+			if (rionet_active[i])
+				rionet_queue_tx_msg(skb, ndev,
+						    rionet_active[i]);
+	} else if (RIONET_MAC_MATCH(eth->h_dest)) {
+		destid = RIONET_GET_DESTID(eth->h_dest);
+		if (rionet_active[destid])
+			rionet_queue_tx_msg(skb, ndev, rionet_active[destid]);
+	}
+
+	spin_unlock_irq(&rnet->lock);
+
+	return 0;
+}
+
+static int rionet_set_mac_address(struct net_device *ndev, void *p)
+{
+	struct sockaddr *addr = p;
+
+	if (!is_valid_ether_addr(addr->sa_data))
+		return -EADDRNOTAVAIL;
+
+	memcpy(ndev->dev_addr, addr->sa_data, ndev->addr_len);
+
+	return 0;
+}
+
+static int rionet_change_mtu(struct net_device *ndev, int new_mtu)
+{
+	struct rionet_private *rnet = ndev->priv;
+
+	if (netif_msg_drv(rnet))
+		printk(KERN_WARNING
+		       "%s: rionet_change_mtu(): not implemented\n", DRV_NAME);
+
+	return 0;
+}
+
+static void rionet_set_multicast_list(struct net_device *ndev)
+{
+	struct rionet_private *rnet = ndev->priv;
+
+	if (netif_msg_drv(rnet))
+		printk(KERN_WARNING
+		       "%s: rionet_set_multicast_list(): not implemented\n",
+		       DRV_NAME);
+}
+
+static void rionet_dbell_event(struct rio_mport *mport, u16 sid, u16 tid,
+			       u16 info)
+{
+	struct net_device *ndev = sndev;
+	struct rionet_private *rnet = ndev->priv;
+	struct rionet_peer *peer;
+
+	if (netif_msg_intr(rnet))
+		printk(KERN_INFO "%s: doorbell sid %4.4x tid %4.4x info %4.4x",
+		       DRV_NAME, sid, tid, info);
+	if (info == RIONET_DOORBELL_JOIN) {
+		if (!rionet_active[sid]) {
+			list_for_each_entry(peer, &rionet_peers, node) {
+				if (peer->rdev->destid == sid)
+					rionet_active[sid] = peer->rdev;
+			}
+			rio_mport_send_doorbell(mport, sid,
+						RIONET_DOORBELL_JOIN);
+		}
+	} else if (info == RIONET_DOORBELL_LEAVE) {
+		rionet_active[sid] = NULL;
+	} else {
+		if (netif_msg_intr(rnet))
+			printk(KERN_WARNING "%s: unhandled doorbell\n",
+			       DRV_NAME);
+	}
+}
+
+static void rionet_inb_msg_event(struct rio_mport *mport, int mbox, int slot)
+{
+	int n;
+	struct net_device *ndev = sndev;
+	struct rionet_private *rnet = (struct rionet_private *)ndev->priv;
+
+	if (netif_msg_intr(rnet))
+		printk(KERN_INFO "%s: inbound message event, mbox %d slot %d\n",
+		       DRV_NAME, mbox, slot);
+
+	spin_lock(&rnet->lock);
+	if ((n = rionet_rx_clean(ndev)) != rnet->rx_slot)
+		rionet_rx_fill(ndev, n);
+	spin_unlock(&rnet->lock);
+}
+
+static void rionet_outb_msg_event(struct rio_mport *mport, int mbox, int slot)
+{
+	struct net_device *ndev = sndev;
+	struct rionet_private *rnet = ndev->priv;
+
+	spin_lock(&rnet->lock);
+
+	if (netif_msg_intr(rnet))
+		printk(KERN_INFO
+		       "%s: outbound message event, mbox %d slot %d\n",
+		       DRV_NAME, mbox, slot);
+
+	while (rnet->tx_cnt && (rnet->ack_slot != slot)) {
+		/* dma unmap single */
+		dev_kfree_skb_irq(rnet->tx_skb[rnet->ack_slot]);
+		rnet->tx_skb[rnet->ack_slot] = NULL;
+		if (++rnet->ack_slot == RIONET_TX_RING_SIZE)
+			rnet->ack_slot = 0;
+		rnet->tx_cnt--;
+	}
+
+	if (rnet->tx_cnt < RIONET_TX_RING_SIZE)
+		netif_wake_queue(ndev);
+
+	spin_unlock(&rnet->lock);
+}
+
+static int rionet_open(struct net_device *ndev)
+{
+	int i, rc = 0;
+	struct rionet_peer *peer, *tmp;
+	u32 pwdcsr;
+	struct rionet_private *rnet = ndev->priv;
+
+	if (netif_msg_ifup(rnet))
+		printk(KERN_INFO "%s: open\n", DRV_NAME);
+
+	if ((rc = rio_request_inb_dbell(rnet->mport,
+					RIONET_DOORBELL_JOIN,
+					RIONET_DOORBELL_LEAVE,
+					rionet_dbell_event)) < 0)
+		goto out;
+
+	if ((rc = rio_request_inb_mbox(rnet->mport,
+				       RIONET_MAILBOX,
+				       RIONET_RX_RING_SIZE,
+				       rionet_inb_msg_event)) < 0)
+		goto out;
+
+	if ((rc = rio_request_outb_mbox(rnet->mport,
+					RIONET_MAILBOX,
+					RIONET_TX_RING_SIZE,
+					rionet_outb_msg_event)) < 0)
+		goto out;
+
+	/* Initialize inbound message ring */
+	for (i = 0; i < RIONET_RX_RING_SIZE; i++)
+		rnet->rx_skb[i] = NULL;
+	rnet->rx_slot = 0;
+	rionet_rx_fill(ndev, 0);
+
+	rnet->tx_slot = 0;
+	rnet->tx_cnt = 0;
+	rnet->ack_slot = 0;
+
+	spin_lock_init(&rnet->lock);
+
+	rnet->msg_enable = RIONET_DEFAULT_MSGLEVEL;
+
+	netif_carrier_on(ndev);
+	netif_start_queue(ndev);
+
+	list_for_each_entry_safe(peer, tmp, &rionet_peers, node) {
+		if (!(peer->res = rio_request_outb_dbell(peer->rdev,
+							 RIONET_DOORBELL_JOIN,
+							 RIONET_DOORBELL_LEAVE)))
+		{
+			printk(KERN_ERR "%s: error requesting doorbells\n",
+			       DRV_NAME);
+			continue;
+		}
+
+		/*
+		 * If device has initialized inbound doorbells,
+		 * send a join message
+		 */
+		rio_read_config_32(peer->rdev, RIO_WRITE_PORT_CSR, &pwdcsr);
+		if (pwdcsr & RIO_DOORBELL_AVAIL)
+			rio_send_doorbell(peer->rdev, RIONET_DOORBELL_JOIN);
+	}
+
+      out:
+	return rc;
+}
+
+static int rionet_close(struct net_device *ndev)
+{
+	struct rionet_private *rnet = (struct rionet_private *)ndev->priv;
+	struct rionet_peer *peer, *tmp;
+	int i;
+
+	if (netif_msg_ifup(rnet))
+		printk(KERN_INFO "%s: close\n", DRV_NAME);
+
+	netif_stop_queue(ndev);
+	netif_carrier_off(ndev);
+
+	for (i = 0; i < RIONET_RX_RING_SIZE; i++)
+		if (rnet->rx_skb[i])
+			kfree_skb(rnet->rx_skb[i]);
+
+	list_for_each_entry_safe(peer, tmp, &rionet_peers, node) {
+		if (rionet_active[peer->rdev->destid]) {
+			rio_send_doorbell(peer->rdev, RIONET_DOORBELL_LEAVE);
+			rionet_active[peer->rdev->destid] = NULL;
+		}
+		rio_release_outb_dbell(peer->rdev, peer->res);
+	}
+
+	rio_release_inb_dbell(rnet->mport, RIONET_DOORBELL_JOIN,
+			      RIONET_DOORBELL_LEAVE);
+	rio_release_inb_mbox(rnet->mport, RIONET_MAILBOX);
+	rio_release_outb_mbox(rnet->mport, RIONET_MAILBOX);
+
+	return 0;
+}
+
+static void rionet_remove(struct rio_dev *rdev)
+{
+	struct net_device *ndev = NULL;
+	struct rionet_peer *peer, *tmp;
+
+	unregister_netdev(ndev);
+	kfree(ndev);
+
+	list_for_each_entry_safe(peer, tmp, &rionet_peers, node) {
+		list_del(&peer->node);
+		kfree(peer);
+	}
+}
+
+static int rionet_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd)
+{
+	return -EOPNOTSUPP;
+}
+
+static void rionet_get_drvinfo(struct net_device *ndev,
+			       struct ethtool_drvinfo *info)
+{
+	struct rionet_private *rnet = ndev->priv;
+
+	strcpy(info->driver, DRV_NAME);
+	strcpy(info->version, DRV_VERSION);
+	strcpy(info->fw_version, "n/a");
+	sprintf(info->bus_info, "RIO master port %d", rnet->mport->id);
+}
+
+static u32 rionet_get_msglevel(struct net_device *ndev)
+{
+	struct rionet_private *rnet = ndev->priv;
+
+	return rnet->msg_enable;
+}
+
+static void rionet_set_msglevel(struct net_device *ndev, u32 value)
+{
+	struct rionet_private *rnet = ndev->priv;
+
+	rnet->msg_enable = value;
+}
+
+static u32 rionet_get_link(struct net_device *ndev)
+{
+	return netif_carrier_ok(ndev);
+}
+
+static struct ethtool_ops rionet_ethtool_ops = {
+	.get_drvinfo = rionet_get_drvinfo,
+	.get_msglevel = rionet_get_msglevel,
+	.set_msglevel = rionet_set_msglevel,
+	.get_link = rionet_get_link,
+};
+
+static int rionet_setup_netdev(struct rio_mport *mport)
+{
+	int rc = 0;
+	struct net_device *ndev = NULL;
+	struct rionet_private *rnet;
+	u16 device_id;
+
+	/* Allocate our net_device structure */
+	ndev = alloc_etherdev(sizeof(struct rionet_private));
+	if (ndev == NULL) {
+		printk(KERN_INFO "%s: could not allocate ethernet device.\n",
+		       DRV_NAME);
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	/*
+	 * XXX hack, store point a static at ndev so we can get it...
+	 * Perhaps need an array of these that the handler can
+	 * index via the mbox number.
+	 */
+	sndev = ndev;
+
+	/* Set up private area */
+	rnet = (struct rionet_private *)ndev->priv;
+	rnet->mport = mport;
+
+	/* Set the default MAC address */
+	device_id = rio_local_get_device_id(mport);
+	ndev->dev_addr[0] = 0x00;
+	ndev->dev_addr[1] = 0x01;
+	ndev->dev_addr[2] = 0x00;
+	ndev->dev_addr[3] = 0x01;
+	ndev->dev_addr[4] = device_id >> 8;
+	ndev->dev_addr[5] = device_id & 0xff;
+
+	/* Fill in the driver function table */
+	ndev->open = &rionet_open;
+	ndev->hard_start_xmit = &rionet_start_xmit;
+	ndev->stop = &rionet_close;
+	ndev->get_stats = &rionet_stats;
+	ndev->change_mtu = &rionet_change_mtu;
+	ndev->set_mac_address = &rionet_set_mac_address;
+	ndev->set_multicast_list = &rionet_set_multicast_list;
+	ndev->do_ioctl = &rionet_ioctl;
+	SET_ETHTOOL_OPS(ndev, &rionet_ethtool_ops);
+
+	ndev->mtu = RIO_MAX_MSG_SIZE - 14;
+
+	SET_MODULE_OWNER(ndev);
+
+	rc = register_netdev(ndev);
+	if (rc != 0)
+		goto out;
+
+	printk("%s: %s %s Version %s, MAC %02x:%02x:%02x:%02x:%02x:%02x\n",
+	       ndev->name,
+	       DRV_NAME,
+	       DRV_DESC,
+	       DRV_VERSION,
+	       ndev->dev_addr[0], ndev->dev_addr[1], ndev->dev_addr[2],
+	       ndev->dev_addr[3], ndev->dev_addr[4], ndev->dev_addr[5]);
+
+      out:
+	return rc;
+}
+
+/*
+ * XXX Make multi-net safe
+ */
+static int rionet_probe(struct rio_dev *rdev, const struct rio_device_id *id)
+{
+	int rc = -ENODEV;
+	u32 lpef, lsrc_ops, ldst_ops;
+	struct rionet_peer *peer;
+
+	/* If local device is not rionet capable, give up quickly */
+	if (!rionet_capable)
+		goto out;
+
+	/*
+	 * First time through, make sure local device is rionet
+	 * capable, setup netdev,  and set flags so this is skipped
+	 * on later probes
+	 */
+	if (!rionet_check) {
+		rio_local_read_config_32(rdev->net->hport, RIO_PEF_CAR, &lpef);
+		rio_local_read_config_32(rdev->net->hport, RIO_SRC_OPS_CAR,
+					 &lsrc_ops);
+		rio_local_read_config_32(rdev->net->hport, RIO_DST_OPS_CAR,
+					 &ldst_ops);
+		if (!is_rionet_capable(lpef, lsrc_ops, ldst_ops)) {
+			printk(KERN_ERR
+			       "%s: local device is not network capable\n",
+			       DRV_NAME);
+			rionet_check = 1;
+			rionet_capable = 0;
+			goto out;
+		}
+
+		rc = rionet_setup_netdev(rdev->net->hport);
+		rionet_check = 1;
+	}
+
+	/*
+	 * If the remote device has mailbox/doorbell capabilities,
+	 * add it to the peer list.
+	 */
+	if (dev_rionet_capable(rdev)) {
+		if (!(peer = kmalloc(sizeof(struct rionet_peer), GFP_KERNEL))) {
+			rc = -ENOMEM;
+			goto out;
+		}
+		peer->rdev = rdev;
+		list_add_tail(&peer->node, &rionet_peers);
+	}
+
+      out:
+	return rc;
+}
+
+static struct rio_device_id rionet_id_table[] = {
+	{RIO_DEVICE(RIO_ANY_ID, RIO_ANY_ID)}
+};
+
+static struct rio_driver rionet_driver = {
+	.name = "rionet",
+	.id_table = rionet_id_table,
+	.probe = rionet_probe,
+	.remove = rionet_remove,
+};
+
+static int __init rionet_init(void)
+{
+	return rio_register_driver(&rionet_driver);
+}
+
+static void __exit rionet_exit(void)
+{
+	rio_unregister_driver(&rionet_driver);
+}
+
+module_init(rionet_init);
+module_exit(rionet_exit);

Re: [PATCH][1/3] RapidIO support: core

[Matt Porter]

On Wed, Jun 01, 2005 at 11:08:36AM -0700, Matt Porter wrote:
> Adds a RapidIO subsystem to the kernel. RIO is a switched
> fabric interconnect used in higher-end embedded applications.
> The curious can look at the specs over at http://www.rapidio.org
> 
> The core code implements enumeration/discovery, management of
> devices/resources, and interfaces for RIO drivers.

I'm also hacking on a rioutils package (derived from pciutils)
that has a lsrio that works pretty much like the familiar
lspci tool.  The initial release can be grabbed from:
ftp://source.mvista.com/pub/rio/rioutils-0.10.tar.bz2

-Matt

Re: [PATCH][1/3] RapidIO support: core

[Greg KH]

On Wed, Jun 01, 2005 at 11:08:36AM -0700, Matt Porter wrote:
> Adds a RapidIO subsystem to the kernel. RIO is a switched
> fabric interconnect used in higher-end embedded applications.
> The curious can look at the specs over at http://www.rapidio.org
> 
> The core code implements enumeration/discovery, management of
> devices/resources, and interfaces for RIO drivers.
> 
> There's a lot more to do to take advantages of all the hardware
> features. However, this should provide a good base for folks
> with RIO hardware to start contributing.
> 
> Signed-off-by: Matt Porter <mporter@kernel.crashing.org>
> 
> Patch is 108KB and can be found here:
> ftp://source.mvista.com/pub/rio/l26_rio_core.patch

Care to split it up into logical sections and post it?  It should be
small enough to do so that way.

thanks,

greg k-h

Re: [PATCH][1/3] RapidIO support: core

[Greg KH]

On Wed, Jun 01, 2005 at 11:08:36AM -0700, Matt Porter wrote:
> Patch is 108KB and can be found here:
> ftp://source.mvista.com/pub/rio/l26_rio_core.patch

register_driver() does not return the number of devices bound to the
driver.  So your comment in rio_register_driver() is incorrect.  Just
return count.

Hm, if the patch was inline it would be easier to comment on stuff like
this, I'll wait till then for the rest :)

thanks,

greg k-h