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authorpopcornmix <popcornmix@gmail.com>2013-07-02 23:42:01 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-10-02 15:40:04 +0200
commit71bad7f086419dc674244b91ca35a12bfa4cb597 (patch)
tree1979e0b8fe9c008c5ac2c9463af794ed50136b70 /drivers/staging/vc04_services
parent88638cf1a8c352bb47c23adbc36d35cfd6ace5a1 (diff)
staging: add bcm2708 vchiq driver
Signed-off-by: popcornmix <popcornmix@gmail.com> vchiq: create_pagelist copes with vmalloc memory Signed-off-by: Daniel Stone <daniels@collabora.com> vchiq: fix the shim message release Signed-off-by: Daniel Stone <daniels@collabora.com> vchiq: export additional symbols Signed-off-by: Daniel Stone <daniels@collabora.com> VCHIQ: Make service closure fully synchronous (drv) This is one half of a two-part patch, the other half of which is to the vchiq_lib user library. With these patches, calls to vchiq_close_service and vchiq_remove_service won't return until any associated callbacks have been delivered to the callback thread. VCHIQ: Add per-service tracing The new service option VCHIQ_SERVICE_OPTION_TRACE is a boolean that toggles tracing for the specified service. This commit also introduces vchi_service_set_option and the associated option VCHI_SERVICE_OPTION_TRACE. vchiq: Make the synchronous-CLOSE logic more tolerant vchiq: Move logging control into debugfs vchiq: Take care of a corner case tickled by VCSM Closing a connection that isn't fully open requires care, since one side does not know the other side's port number. Code was present to handle the case where a CLOSE is sent immediately after an OPEN, i.e. before the OPENACK has been received, but this was incorrectly being used when an OPEN from a client using port 0 was rejected. (In the observed failure, the host was attempting to use the VCSM service, which isn't present in the 'cutdown' firmware. The failure was intermittent because sometimes the keepalive service would grab port 0.) This case can be distinguished because the client's remoteport will still be VCHIQ_PORT_FREE, and the srvstate will be OPENING. Either condition is sufficient to differentiate it from the special case described above. vchiq: Avoid high load when blocked and unkillable vchiq: Include SIGSTOP and SIGCONT in list of signals not-masked by vchiq to allow gdb to work vchiq_arm: Complete support for SYNCHRONOUS mode vchiq: Remove inline from suspend/resume vchiq: Allocation does not need to be atomic vchiq: Fix wrong condition check The log level is checked from within the log call. Remove the check in the call. Signed-off-by: Pranith Kumar <bobby.prani@gmail.com> BCM270x: Add vchiq device to platform file and Device Tree Prepare to turn the vchiq module into a driver. Signed-off-by: Noralf Trønnes <noralf@tronnes.org> bcm2708: vchiq: Add Device Tree support Turn vchiq into a driver and stop hardcoding resources. Use devm_* functions in probe path to simplify cleanup. A global variable is used to hold the register address. This is done to keep this patch as small as possible. Also make available on ARCH_BCM2835. Based on work by Lubomir Rintel. Signed-off-by: Noralf Trønnes <noralf@tronnes.org> vchiq: Change logging level for inbound data vchiq_arm: Two cacheing fixes 1) Make fragment size vary with cache line size Without this patch, non-cache-line-aligned transfers may corrupt (or be corrupted by) adjacent data structures. Both ARM and VC need to be updated to enable this feature. This is ensured by having the loader apply a new DT parameter - cache-line-size. The existence of this parameter guarantees that the kernel is capable, and the parameter will only be modified from the safe default if the loader is capable. 2) Flush/invalidate vmalloc'd memory, and invalidate after reads vchiq: fix NULL pointer dereference when closing driver The following code run as root will cause a null pointer dereference oops: int fd = open("/dev/vc-cma", O_RDONLY); if (fd < 0) err(1, "open failed"); (void)close(fd); [ 1704.877721] Unable to handle kernel NULL pointer dereference at virtual address 00000000 [ 1704.877725] pgd = b899c000 [ 1704.877736] [00000000] *pgd=37fab831, *pte=00000000, *ppte=00000000 [ 1704.877748] Internal error: Oops: 817 [#1] PREEMPT SMP ARM [ 1704.877765] Modules linked in: evdev i2c_bcm2708 uio_pdrv_genirq uio [ 1704.877774] CPU: 2 PID: 3656 Comm: stress-ng-fstat Not tainted 3.19.1-12-generic-bcm2709 #12-Ubuntu [ 1704.877777] Hardware name: BCM2709 [ 1704.877783] task: b8ab9b00 ti: b7e68000 task.ti: b7e68000 [ 1704.877798] PC is at __down_interruptible+0x50/0xec [ 1704.877806] LR is at down_interruptible+0x5c/0x68 [ 1704.877813] pc : [<80630ee8>] lr : [<800704b0>] psr: 60080093 sp : b7e69e50 ip : b7e69e88 fp : b7e69e84 [ 1704.877817] r10: b88123c8 r9 : 00000010 r8 : 00000001 [ 1704.877822] r7 : b8ab9b00 r6 : 7fffffff r5 : 80a1cc34 r4 : 80a1cc34 [ 1704.877826] r3 : b7e69e50 r2 : 00000000 r1 : 00000000 r0 : 80a1cc34 [ 1704.877833] Flags: nZCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment user [ 1704.877838] Control: 10c5387d Table: 3899c06a DAC: 00000015 [ 1704.877843] Process do-oops (pid: 3656, stack limit = 0xb7e68238) [ 1704.877848] Stack: (0xb7e69e50 to 0xb7e6a000) [ 1704.877856] 9e40: 80a1cc3c 00000000 00000010 b88123c8 [ 1704.877865] 9e60: b7e69e84 80a1cc34 fff9fee9 ffffffff b7e68000 00000009 b7e69ea4 b7e69e88 [ 1704.877874] 9e80: 800704b0 80630ea4 fff9fee9 60080013 80a1cc28 fff9fee9 b7e69edc b7e69ea8 [ 1704.877884] 9ea0: 8040f558 80070460 fff9fee9 ffffffff 00000000 00000000 00000009 80a1cb7c [ 1704.877893] 9ec0: 00000000 80a1cb7c 00000000 00000010 b7e69ef4 b7e69ee0 803e1ba4 8040f514 [ 1704.877902] 9ee0: 00000e48 80a1cb7c b7e69f14 b7e69ef8 803e1c9c 803e1b74 b88123c0 b92acb18 [ 1704.877911] 9f00: b8812790 b8d815d8 b7e69f24 b7e69f18 803e2250 803e1bc8 b7e69f5c b7e69f28 [ 1704.877921] 9f20: 80167bac 803e222c 00000000 00000000 b7e69f54 b8ab9ffc 00000000 8098c794 [ 1704.877930] 9f40: b8ab9b00 8000efc4 b7e68000 00000000 b7e69f6c b7e69f60 80167d6c 80167b28 [ 1704.877939] 9f60: b7e69f8c b7e69f70 80047d38 80167d60 b7e68000 b7e68010 8000efc4 b7e69fb0 [ 1704.877949] 9f80: b7e69fac b7e69f90 80012820 80047c84 01155490 011549a8 00000001 00000006 [ 1704.877957] 9fa0: 00000000 b7e69fb0 8000ee5c 80012790 00000000 353d8c0f 7efc4308 00000000 [ 1704.877966] 9fc0: 01155490 011549a8 00000001 00000006 00000000 00000000 76cf3ba0 00000003 [ 1704.877975] 9fe0: 00000000 7efc42e4 0002272f 76e2ed66 60080030 00000003 00000000 00000000 [ 1704.877998] [<80630ee8>] (__down_interruptible) from [<800704b0>] (down_interruptible+0x5c/0x68) [ 1704.878015] [<800704b0>] (down_interruptible) from [<8040f558>] (vchiu_queue_push+0x50/0xd8) [ 1704.878032] [<8040f558>] (vchiu_queue_push) from [<803e1ba4>] (send_worker_msg+0x3c/0x54) [ 1704.878045] [<803e1ba4>] (send_worker_msg) from [<803e1c9c>] (vc_cma_set_reserve+0xe0/0x1c4) [ 1704.878057] [<803e1c9c>] (vc_cma_set_reserve) from [<803e2250>] (vc_cma_release+0x30/0x38) [ 1704.878069] [<803e2250>] (vc_cma_release) from [<80167bac>] (__fput+0x90/0x1e0) [ 1704.878082] [<80167bac>] (__fput) from [<80167d6c>] (____fput+0x18/0x1c) [ 1704.878094] [<80167d6c>] (____fput) from [<80047d38>] (task_work_run+0xc0/0xf8) [ 1704.878109] [<80047d38>] (task_work_run) from [<80012820>] (do_work_pending+0x9c/0xc4) [ 1704.878123] [<80012820>] (do_work_pending) from [<8000ee5c>] (work_pending+0xc/0x20) [ 1704.878133] Code: e50b1034 e3a01000 e50b2030 e580300c (e5823000) ..the fix is to ensure that we have actually initialized the queue before we attempt to push any items onto it. This occurs if we do an open() followed by a close() without any activity in between. Signed-off-by: Colin Ian King <colin.king@canonical.com> vchiq_arm: Sort out the vmalloc case See: https://github.com/raspberrypi/linux/issues/1055 vchiq: hack: Add include depecated dma include file [gregkh] added dependancy on CONFIG_BROKEN to make things sane for now. Cc: Eric Anholt <eric@anholt.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/vc04_services')
-rw-r--r--drivers/staging/vc04_services/Kconfig9
-rw-r--r--drivers/staging/vc04_services/Makefile14
-rw-r--r--drivers/staging/vc04_services/interface/vchi/connections/connection.h328
-rw-r--r--drivers/staging/vc04_services/interface/vchi/message_drivers/message.h204
-rw-r--r--drivers/staging/vc04_services/interface/vchi/vchi.h378
-rw-r--r--drivers/staging/vc04_services/interface/vchi/vchi_cfg.h224
-rw-r--r--drivers/staging/vc04_services/interface/vchi/vchi_cfg_internal.h71
-rw-r--r--drivers/staging/vc04_services/interface/vchi/vchi_common.h175
-rw-r--r--drivers/staging/vc04_services/interface/vchi/vchi_mh.h42
-rw-r--r--drivers/staging/vc04_services/interface/vchiq_arm/vchiq.h40
-rw-r--r--drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835.h42
-rw-r--r--drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c586
-rw-r--r--drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c2903
-rw-r--r--drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.h220
-rw-r--r--drivers/staging/vc04_services/interface/vchiq_arm/vchiq_build_info.h37
-rw-r--r--drivers/staging/vc04_services/interface/vchiq_arm/vchiq_cfg.h69
-rw-r--r--drivers/staging/vc04_services/interface/vchiq_arm/vchiq_connected.c120
-rw-r--r--drivers/staging/vc04_services/interface/vchiq_arm/vchiq_connected.h50
-rw-r--r--drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c3934
-rw-r--r--drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.h712
-rw-r--r--drivers/staging/vc04_services/interface/vchiq_arm/vchiq_debugfs.c383
-rw-r--r--drivers/staging/vc04_services/interface/vchiq_arm/vchiq_debugfs.h52
-rw-r--r--drivers/staging/vc04_services/interface/vchiq_arm/vchiq_genversion87
-rw-r--r--drivers/staging/vc04_services/interface/vchiq_arm/vchiq_if.h189
-rw-r--r--drivers/staging/vc04_services/interface/vchiq_arm/vchiq_ioctl.h131
-rw-r--r--drivers/staging/vc04_services/interface/vchiq_arm/vchiq_kern_lib.c458
-rw-r--r--drivers/staging/vc04_services/interface/vchiq_arm/vchiq_killable.h69
-rw-r--r--drivers/staging/vc04_services/interface/vchiq_arm/vchiq_memdrv.h71
-rw-r--r--drivers/staging/vc04_services/interface/vchiq_arm/vchiq_pagelist.h58
-rw-r--r--drivers/staging/vc04_services/interface/vchiq_arm/vchiq_shim.c860
-rw-r--r--drivers/staging/vc04_services/interface/vchiq_arm/vchiq_util.c156
-rw-r--r--drivers/staging/vc04_services/interface/vchiq_arm/vchiq_util.h82
-rw-r--r--drivers/staging/vc04_services/interface/vchiq_arm/vchiq_version.c59
33 files changed, 12813 insertions, 0 deletions
diff --git a/drivers/staging/vc04_services/Kconfig b/drivers/staging/vc04_services/Kconfig
new file mode 100644
index 000000000000..9676fb29075a
--- /dev/null
+++ b/drivers/staging/vc04_services/Kconfig
@@ -0,0 +1,9 @@
+config BCM2708_VCHIQ
+ tristate "Videocore VCHIQ"
+ depends on RASPBERRYPI_FIRMWARE && BROKEN
+ default y
+ help
+ Kernel to VideoCore communication interface for the
+ BCM2708 family of products.
+ Defaults to Y when the Broadcom Videocore services
+ are included in the build, N otherwise.
diff --git a/drivers/staging/vc04_services/Makefile b/drivers/staging/vc04_services/Makefile
new file mode 100644
index 000000000000..90ab4781df2c
--- /dev/null
+++ b/drivers/staging/vc04_services/Makefile
@@ -0,0 +1,14 @@
+obj-$(CONFIG_BCM2708_VCHIQ) += vchiq.o
+
+vchiq-objs := \
+ interface/vchiq_arm/vchiq_core.o \
+ interface/vchiq_arm/vchiq_arm.o \
+ interface/vchiq_arm/vchiq_kern_lib.o \
+ interface/vchiq_arm/vchiq_2835_arm.o \
+ interface/vchiq_arm/vchiq_debugfs.o \
+ interface/vchiq_arm/vchiq_shim.o \
+ interface/vchiq_arm/vchiq_util.o \
+ interface/vchiq_arm/vchiq_connected.o \
+
+ccflags-y += -DVCOS_VERIFY_BKPTS=1 -Idrivers/staging/vc04_services -DUSE_VCHIQ_ARM -D__VCCOREVER__=0x04000000
+
diff --git a/drivers/staging/vc04_services/interface/vchi/connections/connection.h b/drivers/staging/vc04_services/interface/vchi/connections/connection.h
new file mode 100644
index 000000000000..fef6ac34c6d2
--- /dev/null
+++ b/drivers/staging/vc04_services/interface/vchi/connections/connection.h
@@ -0,0 +1,328 @@
+/**
+ * Copyright (c) 2010-2012 Broadcom. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The names of the above-listed copyright holders may not be used
+ * to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2, as published by the Free
+ * Software Foundation.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef CONNECTION_H_
+#define CONNECTION_H_
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/semaphore.h>
+
+#include "interface/vchi/vchi_cfg_internal.h"
+#include "interface/vchi/vchi_common.h"
+#include "interface/vchi/message_drivers/message.h"
+
+/******************************************************************************
+ Global defs
+ *****************************************************************************/
+
+// Opaque handle for a connection / service pair
+typedef struct opaque_vchi_connection_connected_service_handle_t *VCHI_CONNECTION_SERVICE_HANDLE_T;
+
+// opaque handle to the connection state information
+typedef struct opaque_vchi_connection_info_t VCHI_CONNECTION_STATE_T;
+
+typedef struct vchi_connection_t VCHI_CONNECTION_T;
+
+
+/******************************************************************************
+ API
+ *****************************************************************************/
+
+// Routine to init a connection with a particular low level driver
+typedef VCHI_CONNECTION_STATE_T * (*VCHI_CONNECTION_INIT_T)( struct vchi_connection_t * connection,
+ const VCHI_MESSAGE_DRIVER_T * driver );
+
+// Routine to control CRC enabling at a connection level
+typedef int32_t (*VCHI_CONNECTION_CRC_CONTROL_T)( VCHI_CONNECTION_STATE_T *state_handle,
+ VCHI_CRC_CONTROL_T control );
+
+// Routine to create a service
+typedef int32_t (*VCHI_CONNECTION_SERVICE_CONNECT_T)( VCHI_CONNECTION_STATE_T *state_handle,
+ int32_t service_id,
+ uint32_t rx_fifo_size,
+ uint32_t tx_fifo_size,
+ int server,
+ VCHI_CALLBACK_T callback,
+ void *callback_param,
+ int32_t want_crc,
+ int32_t want_unaligned_bulk_rx,
+ int32_t want_unaligned_bulk_tx,
+ VCHI_CONNECTION_SERVICE_HANDLE_T *service_handle );
+
+// Routine to close a service
+typedef int32_t (*VCHI_CONNECTION_SERVICE_DISCONNECT_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle );
+
+// Routine to queue a message
+typedef int32_t (*VCHI_CONNECTION_SERVICE_QUEUE_MESSAGE_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle,
+ const void *data,
+ uint32_t data_size,
+ VCHI_FLAGS_T flags,
+ void *msg_handle );
+
+// scatter-gather (vector) message queueing
+typedef int32_t (*VCHI_CONNECTION_SERVICE_QUEUE_MESSAGEV_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle,
+ VCHI_MSG_VECTOR_T *vector,
+ uint32_t count,
+ VCHI_FLAGS_T flags,
+ void *msg_handle );
+
+// Routine to dequeue a message
+typedef int32_t (*VCHI_CONNECTION_SERVICE_DEQUEUE_MESSAGE_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle,
+ void *data,
+ uint32_t max_data_size_to_read,
+ uint32_t *actual_msg_size,
+ VCHI_FLAGS_T flags );
+
+// Routine to peek at a message
+typedef int32_t (*VCHI_CONNECTION_SERVICE_PEEK_MESSAGE_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle,
+ void **data,
+ uint32_t *msg_size,
+ VCHI_FLAGS_T flags );
+
+// Routine to hold a message
+typedef int32_t (*VCHI_CONNECTION_SERVICE_HOLD_MESSAGE_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle,
+ void **data,
+ uint32_t *msg_size,
+ VCHI_FLAGS_T flags,
+ void **message_handle );
+
+// Routine to initialise a received message iterator
+typedef int32_t (*VCHI_CONNECTION_SERVICE_LOOKAHEAD_MESSAGE_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle,
+ VCHI_MSG_ITER_T *iter,
+ VCHI_FLAGS_T flags );
+
+// Routine to release a held message
+typedef int32_t (*VCHI_CONNECTION_HELD_MSG_RELEASE_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle,
+ void *message_handle );
+
+// Routine to get info on a held message
+typedef int32_t (*VCHI_CONNECTION_HELD_MSG_INFO_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle,
+ void *message_handle,
+ void **data,
+ int32_t *msg_size,
+ uint32_t *tx_timestamp,
+ uint32_t *rx_timestamp );
+
+// Routine to check whether the iterator has a next message
+typedef int32_t (*VCHI_CONNECTION_MSG_ITER_HAS_NEXT_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service,
+ const VCHI_MSG_ITER_T *iter );
+
+// Routine to advance the iterator
+typedef int32_t (*VCHI_CONNECTION_MSG_ITER_NEXT_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service,
+ VCHI_MSG_ITER_T *iter,
+ void **data,
+ uint32_t *msg_size );
+
+// Routine to remove the last message returned by the iterator
+typedef int32_t (*VCHI_CONNECTION_MSG_ITER_REMOVE_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service,
+ VCHI_MSG_ITER_T *iter );
+
+// Routine to hold the last message returned by the iterator
+typedef int32_t (*VCHI_CONNECTION_MSG_ITER_HOLD_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service,
+ VCHI_MSG_ITER_T *iter,
+ void **msg_handle );
+
+// Routine to transmit bulk data
+typedef int32_t (*VCHI_CONNECTION_BULK_QUEUE_TRANSMIT_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle,
+ const void *data_src,
+ uint32_t data_size,
+ VCHI_FLAGS_T flags,
+ void *bulk_handle );
+
+// Routine to receive data
+typedef int32_t (*VCHI_CONNECTION_BULK_QUEUE_RECEIVE_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle,
+ void *data_dst,
+ uint32_t data_size,
+ VCHI_FLAGS_T flags,
+ void *bulk_handle );
+
+// Routine to report if a server is available
+typedef int32_t (*VCHI_CONNECTION_SERVER_PRESENT)( VCHI_CONNECTION_STATE_T *state, int32_t service_id, int32_t peer_flags );
+
+// Routine to report the number of RX slots available
+typedef int (*VCHI_CONNECTION_RX_SLOTS_AVAILABLE)( const VCHI_CONNECTION_STATE_T *state );
+
+// Routine to report the RX slot size
+typedef uint32_t (*VCHI_CONNECTION_RX_SLOT_SIZE)( const VCHI_CONNECTION_STATE_T *state );
+
+// Callback to indicate that the other side has added a buffer to the rx bulk DMA FIFO
+typedef void (*VCHI_CONNECTION_RX_BULK_BUFFER_ADDED)(VCHI_CONNECTION_STATE_T *state,
+ int32_t service,
+ uint32_t length,
+ MESSAGE_TX_CHANNEL_T channel,
+ uint32_t channel_params,
+ uint32_t data_length,
+ uint32_t data_offset);
+
+// Callback to inform a service that a Xon or Xoff message has been received
+typedef void (*VCHI_CONNECTION_FLOW_CONTROL)(VCHI_CONNECTION_STATE_T *state, int32_t service_id, int32_t xoff);
+
+// Callback to inform a service that a server available reply message has been received
+typedef void (*VCHI_CONNECTION_SERVER_AVAILABLE_REPLY)(VCHI_CONNECTION_STATE_T *state, int32_t service_id, uint32_t flags);
+
+// Callback to indicate that bulk auxiliary messages have arrived
+typedef void (*VCHI_CONNECTION_BULK_AUX_RECEIVED)(VCHI_CONNECTION_STATE_T *state);
+
+// Callback to indicate that bulk auxiliary messages have arrived
+typedef void (*VCHI_CONNECTION_BULK_AUX_TRANSMITTED)(VCHI_CONNECTION_STATE_T *state, void *handle);
+
+// Callback with all the connection info you require
+typedef void (*VCHI_CONNECTION_INFO)(VCHI_CONNECTION_STATE_T *state, uint32_t protocol_version, uint32_t slot_size, uint32_t num_slots, uint32_t min_bulk_size);
+
+// Callback to inform of a disconnect
+typedef void (*VCHI_CONNECTION_DISCONNECT)(VCHI_CONNECTION_STATE_T *state, uint32_t flags);
+
+// Callback to inform of a power control request
+typedef void (*VCHI_CONNECTION_POWER_CONTROL)(VCHI_CONNECTION_STATE_T *state, MESSAGE_TX_CHANNEL_T channel, int32_t enable);
+
+// allocate memory suitably aligned for this connection
+typedef void * (*VCHI_BUFFER_ALLOCATE)(VCHI_CONNECTION_SERVICE_HANDLE_T service_handle, uint32_t * length);
+
+// free memory allocated by buffer_allocate
+typedef void (*VCHI_BUFFER_FREE)(VCHI_CONNECTION_SERVICE_HANDLE_T service_handle, void * address);
+
+
+/******************************************************************************
+ System driver struct
+ *****************************************************************************/
+
+struct opaque_vchi_connection_api_t
+{
+ // Routine to init the connection
+ VCHI_CONNECTION_INIT_T init;
+
+ // Connection-level CRC control
+ VCHI_CONNECTION_CRC_CONTROL_T crc_control;
+
+ // Routine to connect to or create service
+ VCHI_CONNECTION_SERVICE_CONNECT_T service_connect;
+
+ // Routine to disconnect from a service
+ VCHI_CONNECTION_SERVICE_DISCONNECT_T service_disconnect;
+
+ // Routine to queue a message
+ VCHI_CONNECTION_SERVICE_QUEUE_MESSAGE_T service_queue_msg;
+
+ // scatter-gather (vector) message queue
+ VCHI_CONNECTION_SERVICE_QUEUE_MESSAGEV_T service_queue_msgv;
+
+ // Routine to dequeue a message
+ VCHI_CONNECTION_SERVICE_DEQUEUE_MESSAGE_T service_dequeue_msg;
+
+ // Routine to peek at a message
+ VCHI_CONNECTION_SERVICE_PEEK_MESSAGE_T service_peek_msg;
+
+ // Routine to hold a message
+ VCHI_CONNECTION_SERVICE_HOLD_MESSAGE_T service_hold_msg;
+
+ // Routine to initialise a received message iterator
+ VCHI_CONNECTION_SERVICE_LOOKAHEAD_MESSAGE_T service_look_ahead_msg;
+
+ // Routine to release a message
+ VCHI_CONNECTION_HELD_MSG_RELEASE_T held_msg_release;
+
+ // Routine to get information on a held message
+ VCHI_CONNECTION_HELD_MSG_INFO_T held_msg_info;
+
+ // Routine to check for next message on iterator
+ VCHI_CONNECTION_MSG_ITER_HAS_NEXT_T msg_iter_has_next;
+
+ // Routine to get next message on iterator
+ VCHI_CONNECTION_MSG_ITER_NEXT_T msg_iter_next;
+
+ // Routine to remove the last message returned by iterator
+ VCHI_CONNECTION_MSG_ITER_REMOVE_T msg_iter_remove;
+
+ // Routine to hold the last message returned by iterator
+ VCHI_CONNECTION_MSG_ITER_HOLD_T msg_iter_hold;
+
+ // Routine to transmit bulk data
+ VCHI_CONNECTION_BULK_QUEUE_TRANSMIT_T bulk_queue_transmit;
+
+ // Routine to receive data
+ VCHI_CONNECTION_BULK_QUEUE_RECEIVE_T bulk_queue_receive;
+
+ // Routine to report the available servers
+ VCHI_CONNECTION_SERVER_PRESENT server_present;
+
+ // Routine to report the number of RX slots available
+ VCHI_CONNECTION_RX_SLOTS_AVAILABLE connection_rx_slots_available;
+
+ // Routine to report the RX slot size
+ VCHI_CONNECTION_RX_SLOT_SIZE connection_rx_slot_size;
+
+ // Callback to indicate that the other side has added a buffer to the rx bulk DMA FIFO
+ VCHI_CONNECTION_RX_BULK_BUFFER_ADDED rx_bulk_buffer_added;
+
+ // Callback to inform a service that a Xon or Xoff message has been received
+ VCHI_CONNECTION_FLOW_CONTROL flow_control;
+
+ // Callback to inform a service that a server available reply message has been received
+ VCHI_CONNECTION_SERVER_AVAILABLE_REPLY server_available_reply;
+
+ // Callback to indicate that bulk auxiliary messages have arrived
+ VCHI_CONNECTION_BULK_AUX_RECEIVED bulk_aux_received;
+
+ // Callback to indicate that a bulk auxiliary message has been transmitted
+ VCHI_CONNECTION_BULK_AUX_TRANSMITTED bulk_aux_transmitted;
+
+ // Callback to provide information about the connection
+ VCHI_CONNECTION_INFO connection_info;
+
+ // Callback to notify that peer has requested disconnect
+ VCHI_CONNECTION_DISCONNECT disconnect;
+
+ // Callback to notify that peer has requested power change
+ VCHI_CONNECTION_POWER_CONTROL power_control;
+
+ // allocate memory suitably aligned for this connection
+ VCHI_BUFFER_ALLOCATE buffer_allocate;
+
+ // free memory allocated by buffer_allocate
+ VCHI_BUFFER_FREE buffer_free;
+
+};
+
+struct vchi_connection_t {
+ const VCHI_CONNECTION_API_T *api;
+ VCHI_CONNECTION_STATE_T *state;
+#ifdef VCHI_COARSE_LOCKING
+ struct semaphore sem;
+#endif
+};
+
+
+#endif /* CONNECTION_H_ */
+
+/****************************** End of file **********************************/
diff --git a/drivers/staging/vc04_services/interface/vchi/message_drivers/message.h b/drivers/staging/vc04_services/interface/vchi/message_drivers/message.h
new file mode 100644
index 000000000000..8b3f76735bd4
--- /dev/null
+++ b/drivers/staging/vc04_services/interface/vchi/message_drivers/message.h
@@ -0,0 +1,204 @@
+/**
+ * Copyright (c) 2010-2012 Broadcom. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The names of the above-listed copyright holders may not be used
+ * to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2, as published by the Free
+ * Software Foundation.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _VCHI_MESSAGE_H_
+#define _VCHI_MESSAGE_H_
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/semaphore.h>
+
+#include "interface/vchi/vchi_cfg_internal.h"
+#include "interface/vchi/vchi_common.h"
+
+
+typedef enum message_event_type {
+ MESSAGE_EVENT_NONE,
+ MESSAGE_EVENT_NOP,
+ MESSAGE_EVENT_MESSAGE,
+ MESSAGE_EVENT_SLOT_COMPLETE,
+ MESSAGE_EVENT_RX_BULK_PAUSED,
+ MESSAGE_EVENT_RX_BULK_COMPLETE,
+ MESSAGE_EVENT_TX_COMPLETE,
+ MESSAGE_EVENT_MSG_DISCARDED
+} MESSAGE_EVENT_TYPE_T;
+
+typedef enum vchi_msg_flags
+{