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950-0234-staging-vc04_services-Split-vchiq-mmal-into-a-module.patch
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950-0234-staging-vc04_services-Split-vchiq-mmal-into-a-module.patch
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From e7723c6bcf31a440b8762e9e22497ff3fbbb7056 Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.org>
Date: Mon, 24 Sep 2018 16:30:37 +0100
Subject: [PATCH] staging: vc04_services: Split vchiq-mmal into a
module
In preparation for adding a video codec V4L2 module which also
wants to use vchiq-mmal functions, split it out into an
independent module.
The minimum number of changes have been made to achieve this
(eg straight moves where possible) so existing checkpatch
errors will still be present.
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
---
drivers/staging/vc04_services/Kconfig | 1 +
drivers/staging/vc04_services/Makefile | 1 +
.../vc04_services/bcm2835-camera/Kconfig | 2 +-
.../vc04_services/bcm2835-camera/Makefile | 4 ++--
.../staging/vc04_services/vchiq-mmal/Kconfig | 7 ++++++
.../staging/vc04_services/vchiq-mmal/Makefile | 8 +++++++
.../mmal-common.h | 0
.../mmal-encodings.h | 0
.../mmal-msg-common.h | 0
.../mmal-msg-format.h | 0
.../mmal-msg-port.h | 0
.../{bcm2835-camera => vchiq-mmal}/mmal-msg.h | 0
.../mmal-parameters.h | 0
.../mmal-vchiq.c | 22 +++++++++++++++++++
.../mmal-vchiq.h | 0
15 files changed, 42 insertions(+), 3 deletions(-)
create mode 100644 drivers/staging/vc04_services/vchiq-mmal/Kconfig
create mode 100644 drivers/staging/vc04_services/vchiq-mmal/Makefile
rename drivers/staging/vc04_services/{bcm2835-camera => vchiq-mmal}/mmal-common.h (100%)
rename drivers/staging/vc04_services/{bcm2835-camera => vchiq-mmal}/mmal-encodings.h (100%)
rename drivers/staging/vc04_services/{bcm2835-camera => vchiq-mmal}/mmal-msg-common.h (100%)
rename drivers/staging/vc04_services/{bcm2835-camera => vchiq-mmal}/mmal-msg-format.h (100%)
rename drivers/staging/vc04_services/{bcm2835-camera => vchiq-mmal}/mmal-msg-port.h (100%)
rename drivers/staging/vc04_services/{bcm2835-camera => vchiq-mmal}/mmal-msg.h (100%)
rename drivers/staging/vc04_services/{bcm2835-camera => vchiq-mmal}/mmal-parameters.h (100%)
rename drivers/staging/vc04_services/{bcm2835-camera => vchiq-mmal}/mmal-vchiq.c (98%)
rename drivers/staging/vc04_services/{bcm2835-camera => vchiq-mmal}/mmal-vchiq.h (100%)
--- a/drivers/staging/vc04_services/Kconfig
+++ b/drivers/staging/vc04_services/Kconfig
@@ -21,6 +21,7 @@ config BCM2835_VCHIQ
source "drivers/staging/vc04_services/bcm2835-audio/Kconfig"
source "drivers/staging/vc04_services/bcm2835-camera/Kconfig"
+source "drivers/staging/vc04_services/vchiq-mmal/Kconfig"
endif
--- a/drivers/staging/vc04_services/Makefile
+++ b/drivers/staging/vc04_services/Makefile
@@ -12,6 +12,7 @@ vchiq-objs := \
obj-$(CONFIG_SND_BCM2835) += bcm2835-audio/
obj-$(CONFIG_VIDEO_BCM2835) += bcm2835-camera/
+obj-$(CONFIG_BCM2835_VCHIQ_MMAL) += vchiq-mmal/
ccflags-y += -Idrivers/staging/vc04_services -D__VCCOREVER__=0x04000000
--- a/drivers/staging/vc04_services/bcm2835-camera/Kconfig
+++ b/drivers/staging/vc04_services/bcm2835-camera/Kconfig
@@ -2,7 +2,7 @@ config VIDEO_BCM2835
tristate "BCM2835 Camera"
depends on MEDIA_SUPPORT
depends on VIDEO_V4L2 && (ARCH_BCM2835 || COMPILE_TEST)
- select BCM2835_VCHIQ
+ select BCM2835_VCHIQ_MMAL
select VIDEOBUF2_VMALLOC
select BTREE
help
--- a/drivers/staging/vc04_services/bcm2835-camera/Makefile
+++ b/drivers/staging/vc04_services/bcm2835-camera/Makefile
@@ -1,11 +1,11 @@
# SPDX-License-Identifier: GPL-2.0
bcm2835-v4l2-$(CONFIG_VIDEO_BCM2835) := \
bcm2835-camera.o \
- controls.o \
- mmal-vchiq.o
+ controls.o
obj-$(CONFIG_VIDEO_BCM2835) += bcm2835-v4l2.o
ccflags-y += \
-Idrivers/staging/vc04_services \
+ -Idrivers/staging/vc04_services/vchiq-mmal \
-D__VCCOREVER__=0x04000000
--- /dev/null
+++ b/drivers/staging/vc04_services/vchiq-mmal/Kconfig
@@ -0,0 +1,7 @@
+config BCM2835_VCHIQ_MMAL
+ tristate "BCM2835 MMAL VCHIQ service"
+ depends on (ARCH_BCM2835 || COMPILE_TEST)
+ select BCM2835_VCHIQ
+ help
+ Enables the MMAL API over VCHIQ as used for the
+ majority of the multimedia services on VideoCore.
--- /dev/null
+++ b/drivers/staging/vc04_services/vchiq-mmal/Makefile
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0
+bcm2835-mmal-vchiq-objs := mmal-vchiq.o
+
+obj-$(CONFIG_BCM2835_VCHIQ_MMAL) += bcm2835-mmal-vchiq.o
+
+ccflags-y += \
+ -Idrivers/staging/vc04_services \
+ -D__VCCOREVER__=0x04000000
--- a/drivers/staging/vc04_services/bcm2835-camera/mmal-vchiq.c
+++ /dev/null
@@ -1,1899 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Broadcom BM2835 V4L2 driver
- *
- * Copyright © 2013 Raspberry Pi (Trading) Ltd.
- *
- * Authors: Vincent Sanders @ Collabora
- * Dave Stevenson @ Broadcom
- * (now dave.stevenson@raspberrypi.org)
- * Simon Mellor @ Broadcom
- * Luke Diamand @ Broadcom
- *
- * V4L2 driver MMAL vchiq interface code
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/errno.h>
-#include <linux/kernel.h>
-#include <linux/mutex.h>
-#include <linux/mm.h>
-#include <linux/slab.h>
-#include <linux/completion.h>
-#include <linux/vmalloc.h>
-#include <asm/cacheflush.h>
-#include <media/videobuf2-vmalloc.h>
-
-#include "mmal-common.h"
-#include "mmal-vchiq.h"
-#include "mmal-msg.h"
-
-#define USE_VCHIQ_ARM
-#include "interface/vchi/vchi.h"
-
-/* maximum number of components supported */
-#define VCHIQ_MMAL_MAX_COMPONENTS 4
-
-/*#define FULL_MSG_DUMP 1*/
-
-#ifdef DEBUG
-static const char *const msg_type_names[] = {
- "UNKNOWN",
- "QUIT",
- "SERVICE_CLOSED",
- "GET_VERSION",
- "COMPONENT_CREATE",
- "COMPONENT_DESTROY",
- "COMPONENT_ENABLE",
- "COMPONENT_DISABLE",
- "PORT_INFO_GET",
- "PORT_INFO_SET",
- "PORT_ACTION",
- "BUFFER_FROM_HOST",
- "BUFFER_TO_HOST",
- "GET_STATS",
- "PORT_PARAMETER_SET",
- "PORT_PARAMETER_GET",
- "EVENT_TO_HOST",
- "GET_CORE_STATS_FOR_PORT",
- "OPAQUE_ALLOCATOR",
- "CONSUME_MEM",
- "LMK",
- "OPAQUE_ALLOCATOR_DESC",
- "DRM_GET_LHS32",
- "DRM_GET_TIME",
- "BUFFER_FROM_HOST_ZEROLEN",
- "PORT_FLUSH",
- "HOST_LOG",
-};
-#endif
-
-static const char *const port_action_type_names[] = {
- "UNKNOWN",
- "ENABLE",
- "DISABLE",
- "FLUSH",
- "CONNECT",
- "DISCONNECT",
- "SET_REQUIREMENTS",
-};
-
-#if defined(DEBUG)
-#if defined(FULL_MSG_DUMP)
-#define DBG_DUMP_MSG(MSG, MSG_LEN, TITLE) \
- do { \
- pr_debug(TITLE" type:%s(%d) length:%d\n", \
- msg_type_names[(MSG)->h.type], \
- (MSG)->h.type, (MSG_LEN)); \
- print_hex_dump(KERN_DEBUG, "<<h: ", DUMP_PREFIX_OFFSET, \
- 16, 4, (MSG), \
- sizeof(struct mmal_msg_header), 1); \
- print_hex_dump(KERN_DEBUG, "<<p: ", DUMP_PREFIX_OFFSET, \
- 16, 4, \
- ((u8 *)(MSG)) + sizeof(struct mmal_msg_header),\
- (MSG_LEN) - sizeof(struct mmal_msg_header), 1); \
- } while (0)
-#else
-#define DBG_DUMP_MSG(MSG, MSG_LEN, TITLE) \
- { \
- pr_debug(TITLE" type:%s(%d) length:%d\n", \
- msg_type_names[(MSG)->h.type], \
- (MSG)->h.type, (MSG_LEN)); \
- }
-#endif
-#else
-#define DBG_DUMP_MSG(MSG, MSG_LEN, TITLE)
-#endif
-
-struct vchiq_mmal_instance;
-
-/* normal message context */
-struct mmal_msg_context {
- struct vchiq_mmal_instance *instance;
-
- /* Index in the context_map idr so that we can find the
- * mmal_msg_context again when servicing the VCHI reply.
- */
- int handle;
-
- union {
- struct {
- /* work struct for buffer_cb callback */
- struct work_struct work;
- /* work struct for deferred callback */
- struct work_struct buffer_to_host_work;
- /* mmal instance */
- struct vchiq_mmal_instance *instance;
- /* mmal port */
- struct vchiq_mmal_port *port;
- /* actual buffer used to store bulk reply */
- struct mmal_buffer *buffer;
- /* amount of buffer used */
- unsigned long buffer_used;
- /* MMAL buffer flags */
- u32 mmal_flags;
- /* Presentation and Decode timestamps */
- s64 pts;
- s64 dts;
-
- int status; /* context status */
-
- } bulk; /* bulk data */
-
- struct {
- /* message handle to release */
- VCHI_HELD_MSG_T msg_handle;
- /* pointer to received message */
- struct mmal_msg *msg;
- /* received message length */
- u32 msg_len;
- /* completion upon reply */
- struct completion cmplt;
- } sync; /* synchronous response */
- } u;
-
-};
-
-struct vchiq_mmal_instance {
- VCHI_SERVICE_HANDLE_T handle;
-
- /* ensure serialised access to service */
- struct mutex vchiq_mutex;
-
- /* vmalloc page to receive scratch bulk xfers into */
- void *bulk_scratch;
-
- struct idr context_map;
- /* protect accesses to context_map */
- struct mutex context_map_lock;
-
- /* component to use next */
- int component_idx;
- struct vchiq_mmal_component component[VCHIQ_MMAL_MAX_COMPONENTS];
-
- /* ordered workqueue to process all bulk operations */
- struct workqueue_struct *bulk_wq;
-};
-
-static struct mmal_msg_context *
-get_msg_context(struct vchiq_mmal_instance *instance)
-{
- struct mmal_msg_context *msg_context;
- int handle;
-
- /* todo: should this be allocated from a pool to avoid kzalloc */
- msg_context = kzalloc(sizeof(*msg_context), GFP_KERNEL);
-
- if (!msg_context)
- return ERR_PTR(-ENOMEM);
-
- /* Create an ID that will be passed along with our message so
- * that when we service the VCHI reply, we can look up what
- * message is being replied to.
- */
- mutex_lock(&instance->context_map_lock);
- handle = idr_alloc(&instance->context_map, msg_context,
- 0, 0, GFP_KERNEL);
- mutex_unlock(&instance->context_map_lock);
-
- if (handle < 0) {
- kfree(msg_context);
- return ERR_PTR(handle);
- }
-
- msg_context->instance = instance;
- msg_context->handle = handle;
-
- return msg_context;
-}
-
-static struct mmal_msg_context *
-lookup_msg_context(struct vchiq_mmal_instance *instance, int handle)
-{
- return idr_find(&instance->context_map, handle);
-}
-
-static void
-release_msg_context(struct mmal_msg_context *msg_context)
-{
- struct vchiq_mmal_instance *instance = msg_context->instance;
-
- mutex_lock(&instance->context_map_lock);
- idr_remove(&instance->context_map, msg_context->handle);
- mutex_unlock(&instance->context_map_lock);
- kfree(msg_context);
-}
-
-/* deals with receipt of event to host message */
-static void event_to_host_cb(struct vchiq_mmal_instance *instance,
- struct mmal_msg *msg, u32 msg_len)
-{
- pr_debug("unhandled event\n");
- pr_debug("component:%u port type:%d num:%d cmd:0x%x length:%d\n",
- msg->u.event_to_host.client_component,
- msg->u.event_to_host.port_type,
- msg->u.event_to_host.port_num,
- msg->u.event_to_host.cmd, msg->u.event_to_host.length);
-}
-
-/* workqueue scheduled callback
- *
- * we do this because it is important we do not call any other vchiq
- * sync calls from witin the message delivery thread
- */
-static void buffer_work_cb(struct work_struct *work)
-{
- struct mmal_msg_context *msg_context =
- container_of(work, struct mmal_msg_context, u.bulk.work);
-
- atomic_dec(&msg_context->u.bulk.port->buffers_with_vpu);
-
- msg_context->u.bulk.port->buffer_cb(msg_context->u.bulk.instance,
- msg_context->u.bulk.port,
- msg_context->u.bulk.status,
- msg_context->u.bulk.buffer,
- msg_context->u.bulk.buffer_used,
- msg_context->u.bulk.mmal_flags,
- msg_context->u.bulk.dts,
- msg_context->u.bulk.pts);
-}
-
-/* workqueue scheduled callback to handle receiving buffers
- *
- * VCHI will allow up to 4 bulk receives to be scheduled before blocking.
- * If we block in the service_callback context then we can't process the
- * VCHI_CALLBACK_BULK_RECEIVED message that would otherwise allow the blocked
- * vchi_bulk_queue_receive() call to complete.
- */
-static void buffer_to_host_work_cb(struct work_struct *work)
-{
- struct mmal_msg_context *msg_context =
- container_of(work, struct mmal_msg_context,
- u.bulk.buffer_to_host_work);
- struct vchiq_mmal_instance *instance = msg_context->instance;
- unsigned long len = msg_context->u.bulk.buffer_used;
- int ret;
-
- if (!len)
- /* Dummy receive to ensure the buffers remain in order */
- len = 8;
- /* queue the bulk submission */
- vchi_service_use(instance->handle);
- ret = vchi_bulk_queue_receive(instance->handle,
- msg_context->u.bulk.buffer->buffer,
- /* Actual receive needs to be a multiple
- * of 4 bytes
- */
- (len + 3) & ~3,
- VCHI_FLAGS_CALLBACK_WHEN_OP_COMPLETE |
- VCHI_FLAGS_BLOCK_UNTIL_QUEUED,
- msg_context);
-
- vchi_service_release(instance->handle);
-
- if (ret != 0)
- pr_err("%s: ctx: %p, vchi_bulk_queue_receive failed %d\n",
- __func__, msg_context, ret);
-}
-
-/* enqueue a bulk receive for a given message context */
-static int bulk_receive(struct vchiq_mmal_instance *instance,
- struct mmal_msg *msg,
- struct mmal_msg_context *msg_context)
-{
- unsigned long rd_len;
-
- rd_len = msg->u.buffer_from_host.buffer_header.length;
-
- if (!msg_context->u.bulk.buffer) {
- pr_err("bulk.buffer not configured - error in buffer_from_host\n");
-
- /* todo: this is a serious error, we should never have
- * committed a buffer_to_host operation to the mmal
- * port without the buffer to back it up (underflow
- * handling) and there is no obvious way to deal with
- * this - how is the mmal servie going to react when
- * we fail to do the xfer and reschedule a buffer when
- * it arrives? perhaps a starved flag to indicate a
- * waiting bulk receive?
- */
-
- return -EINVAL;
- }
-
- /* ensure we do not overrun the available buffer */
- if (rd_len > msg_context->u.bulk.buffer->buffer_size) {
- rd_len = msg_context->u.bulk.buffer->buffer_size;
- pr_warn("short read as not enough receive buffer space\n");
- /* todo: is this the correct response, what happens to
- * the rest of the message data?
- */
- }
-
- /* store length */
- msg_context->u.bulk.buffer_used = rd_len;
- msg_context->u.bulk.dts = msg->u.buffer_from_host.buffer_header.dts;
- msg_context->u.bulk.pts = msg->u.buffer_from_host.buffer_header.pts;
-
- queue_work(msg_context->instance->bulk_wq,
- &msg_context->u.bulk.buffer_to_host_work);
-
- return 0;
-}
-
-/* data in message, memcpy from packet into output buffer */
-static int inline_receive(struct vchiq_mmal_instance *instance,
- struct mmal_msg *msg,
- struct mmal_msg_context *msg_context)
-{
- memcpy(msg_context->u.bulk.buffer->buffer,
- msg->u.buffer_from_host.short_data,
- msg->u.buffer_from_host.payload_in_message);
-
- msg_context->u.bulk.buffer_used =
- msg->u.buffer_from_host.payload_in_message;
-
- return 0;
-}
-
-/* queue the buffer availability with MMAL_MSG_TYPE_BUFFER_FROM_HOST */
-static int
-buffer_from_host(struct vchiq_mmal_instance *instance,
- struct vchiq_mmal_port *port, struct mmal_buffer *buf)
-{
- struct mmal_msg_context *msg_context;
- struct mmal_msg m;
- int ret;
-
- if (!port->enabled)
- return -EINVAL;
-
- pr_debug("instance:%p buffer:%p\n", instance->handle, buf);
-
- /* get context */
- if (!buf->msg_context) {
- pr_err("%s: msg_context not allocated, buf %p\n", __func__,
- buf);
- return -EINVAL;
- }
- msg_context = buf->msg_context;
-
- /* store bulk message context for when data arrives */
- msg_context->u.bulk.instance = instance;
- msg_context->u.bulk.port = port;
- msg_context->u.bulk.buffer = buf;
- msg_context->u.bulk.buffer_used = 0;
-
- /* initialise work structure ready to schedule callback */
- INIT_WORK(&msg_context->u.bulk.work, buffer_work_cb);
- INIT_WORK(&msg_context->u.bulk.buffer_to_host_work,
- buffer_to_host_work_cb);
-
- atomic_inc(&port->buffers_with_vpu);
-
- /* prep the buffer from host message */
- memset(&m, 0xbc, sizeof(m)); /* just to make debug clearer */
-
- m.h.type = MMAL_MSG_TYPE_BUFFER_FROM_HOST;
- m.h.magic = MMAL_MAGIC;
- m.h.context = msg_context->handle;
- m.h.status = 0;
-
- /* drvbuf is our private data passed back */
- m.u.buffer_from_host.drvbuf.magic = MMAL_MAGIC;
- m.u.buffer_from_host.drvbuf.component_handle = port->component->handle;
- m.u.buffer_from_host.drvbuf.port_handle = port->handle;
- m.u.buffer_from_host.drvbuf.client_context = msg_context->handle;
-
- /* buffer header */
- m.u.buffer_from_host.buffer_header.cmd = 0;
- m.u.buffer_from_host.buffer_header.data =
- (u32)(unsigned long)buf->buffer;
- m.u.buffer_from_host.buffer_header.alloc_size = buf->buffer_size;
- m.u.buffer_from_host.buffer_header.length = 0; /* nothing used yet */
- m.u.buffer_from_host.buffer_header.offset = 0; /* no offset */
- m.u.buffer_from_host.buffer_header.flags = 0; /* no flags */
- m.u.buffer_from_host.buffer_header.pts = MMAL_TIME_UNKNOWN;
- m.u.buffer_from_host.buffer_header.dts = MMAL_TIME_UNKNOWN;
-
- /* clear buffer type sepecific data */
- memset(&m.u.buffer_from_host.buffer_header_type_specific, 0,
- sizeof(m.u.buffer_from_host.buffer_header_type_specific));
-
- /* no payload in message */
- m.u.buffer_from_host.payload_in_message = 0;
-
- vchi_service_use(instance->handle);
-
- ret = vchi_queue_kernel_message(instance->handle,
- &m,
- sizeof(struct mmal_msg_header) +
- sizeof(m.u.buffer_from_host));
-
- vchi_service_release(instance->handle);
-
- return ret;
-}
-
-/* deals with receipt of buffer to host message */
-static void buffer_to_host_cb(struct vchiq_mmal_instance *instance,
- struct mmal_msg *msg, u32 msg_len)
-{
- struct mmal_msg_context *msg_context;
- u32 handle;
-
- pr_debug("%s: instance:%p msg:%p msg_len:%d\n",
- __func__, instance, msg, msg_len);
-
- if (msg->u.buffer_from_host.drvbuf.magic == MMAL_MAGIC) {
- handle = msg->u.buffer_from_host.drvbuf.client_context;
- msg_context = lookup_msg_context(instance, handle);
-
- if (!msg_context) {
- pr_err("drvbuf.client_context(%u) is invalid\n",
- handle);
- return;
- }
- } else {
- pr_err("MMAL_MSG_TYPE_BUFFER_TO_HOST with bad magic\n");
- return;
- }
-
- msg_context->u.bulk.mmal_flags =
- msg->u.buffer_from_host.buffer_header.flags;
-
- if (msg->h.status != MMAL_MSG_STATUS_SUCCESS) {
- /* message reception had an error */
- pr_warn("error %d in reply\n", msg->h.status);
-
- msg_context->u.bulk.status = msg->h.status;
-
- } else if (msg->u.buffer_from_host.buffer_header.length == 0) {
- /* empty buffer */
- if (msg->u.buffer_from_host.buffer_header.flags &
- MMAL_BUFFER_HEADER_FLAG_EOS) {
- msg_context->u.bulk.status =
- bulk_receive(instance, msg, msg_context);
- if (msg_context->u.bulk.status == 0)
- return; /* successful bulk submission, bulk
- * completion will trigger callback
- */
- } else {
- /* do callback with empty buffer - not EOS though */
- msg_context->u.bulk.status = 0;
- msg_context->u.bulk.buffer_used = 0;
- }
- } else if (msg->u.buffer_from_host.payload_in_message == 0) {
- /* data is not in message, queue a bulk receive */
- msg_context->u.bulk.status =
- bulk_receive(instance, msg, msg_context);
- if (msg_context->u.bulk.status == 0)
- return; /* successful bulk submission, bulk
- * completion will trigger callback
- */
-
- /* failed to submit buffer, this will end badly */
- pr_err("error %d on bulk submission\n",
- msg_context->u.bulk.status);
-
- } else if (msg->u.buffer_from_host.payload_in_message <=
- MMAL_VC_SHORT_DATA) {
- /* data payload within message */
- msg_context->u.bulk.status = inline_receive(instance, msg,
- msg_context);
- } else {
- pr_err("message with invalid short payload\n");
-
- /* signal error */
- msg_context->u.bulk.status = -EINVAL;
- msg_context->u.bulk.buffer_used =
- msg->u.buffer_from_host.payload_in_message;
- }
-
- /* schedule the port callback */
- schedule_work(&msg_context->u.bulk.work);
-}
-
-static void bulk_receive_cb(struct vchiq_mmal_instance *instance,
- struct mmal_msg_context *msg_context)
-{
- msg_context->u.bulk.status = 0;
-
- /* schedule the port callback */
- schedule_work(&msg_context->u.bulk.work);
-}
-
-static void bulk_abort_cb(struct vchiq_mmal_instance *instance,
- struct mmal_msg_context *msg_context)
-{
- pr_err("%s: bulk ABORTED msg_context:%p\n", __func__, msg_context);
-
- msg_context->u.bulk.status = -EINTR;
-
- schedule_work(&msg_context->u.bulk.work);
-}
-
-/* incoming event service callback */
-static void service_callback(void *param,
- const VCHI_CALLBACK_REASON_T reason,
- void *bulk_ctx)
-{
- struct vchiq_mmal_instance *instance = param;
- int status;
- u32 msg_len;
- struct mmal_msg *msg;
- VCHI_HELD_MSG_T msg_handle;
- struct mmal_msg_context *msg_context;
-
- if (!instance) {
- pr_err("Message callback passed NULL instance\n");
- return;
- }
-
- switch (reason) {
- case VCHI_CALLBACK_MSG_AVAILABLE:
- status = vchi_msg_hold(instance->handle, (void **)&msg,
- &msg_len, VCHI_FLAGS_NONE, &msg_handle);
- if (status) {
- pr_err("Unable to dequeue a message (%d)\n", status);
- break;
- }
-
- DBG_DUMP_MSG(msg, msg_len, "<<< reply message");
-
- /* handling is different for buffer messages */
- switch (msg->h.type) {
- case MMAL_MSG_TYPE_BUFFER_FROM_HOST:
- vchi_held_msg_release(&msg_handle);
- break;
-
- case MMAL_MSG_TYPE_EVENT_TO_HOST:
- event_to_host_cb(instance, msg, msg_len);
- vchi_held_msg_release(&msg_handle);
-
- break;
-
- case MMAL_MSG_TYPE_BUFFER_TO_HOST:
- buffer_to_host_cb(instance, msg, msg_len);
- vchi_held_msg_release(&msg_handle);
- break;
-
- default:
- /* messages dependent on header context to complete */
- if (!msg->h.context) {
- pr_err("received message context was null!\n");
- vchi_held_msg_release(&msg_handle);
- break;
- }
-
- msg_context = lookup_msg_context(instance,
- msg->h.context);
- if (!msg_context) {
- pr_err("received invalid message context %u!\n",
- msg->h.context);
- vchi_held_msg_release(&msg_handle);
- break;
- }
-
- /* fill in context values */
- msg_context->u.sync.msg_handle = msg_handle;
- msg_context->u.sync.msg = msg;
- msg_context->u.sync.msg_len = msg_len;
-
- /* todo: should this check (completion_done()
- * == 1) for no one waiting? or do we need a
- * flag to tell us the completion has been
- * interrupted so we can free the message and
- * its context. This probably also solves the
- * message arriving after interruption todo
- * below
- */
-
- /* complete message so caller knows it happened */
- complete(&msg_context->u.sync.cmplt);
- break;
- }
-
- break;
-
- case VCHI_CALLBACK_BULK_RECEIVED:
- bulk_receive_cb(instance, bulk_ctx);
- break;
-
- case VCHI_CALLBACK_BULK_RECEIVE_ABORTED:
- bulk_abort_cb(instance, bulk_ctx);
- break;
-
- case VCHI_CALLBACK_SERVICE_CLOSED:
- /* TODO: consider if this requires action if received when
- * driver is not explicitly closing the service
- */
- break;
-
- default:
- pr_err("Received unhandled message reason %d\n", reason);
- break;
- }
-}
-
-static int send_synchronous_mmal_msg(struct vchiq_mmal_instance *instance,
- struct mmal_msg *msg,
- unsigned int payload_len,
- struct mmal_msg **msg_out,
- VCHI_HELD_MSG_T *msg_handle_out)
-{
- struct mmal_msg_context *msg_context;
- int ret;
- unsigned long timeout;
-
- /* payload size must not cause message to exceed max size */
- if (payload_len >
- (MMAL_MSG_MAX_SIZE - sizeof(struct mmal_msg_header))) {
- pr_err("payload length %d exceeds max:%d\n", payload_len,
- (int)(MMAL_MSG_MAX_SIZE -
- sizeof(struct mmal_msg_header)));
- return -EINVAL;
- }
-
- msg_context = get_msg_context(instance);
- if (IS_ERR(msg_context))
- return PTR_ERR(msg_context);
-
- init_completion(&msg_context->u.sync.cmplt);
-
- msg->h.magic = MMAL_MAGIC;
- msg->h.context = msg_context->handle;
- msg->h.status = 0;
-
- DBG_DUMP_MSG(msg, (sizeof(struct mmal_msg_header) + payload_len),
- ">>> sync message");
-
- vchi_service_use(instance->handle);
-
- ret = vchi_queue_kernel_message(instance->handle,
- msg,
- sizeof(struct mmal_msg_header) +
- payload_len);
-
- vchi_service_release(instance->handle);
-
- if (ret) {
- pr_err("error %d queuing message\n", ret);
- release_msg_context(msg_context);
- return ret;
- }
-
- timeout = wait_for_completion_timeout(&msg_context->u.sync.cmplt,
- 3 * HZ);
- if (timeout == 0) {
- pr_err("timed out waiting for sync completion\n");
- ret = -ETIME;
- /* todo: what happens if the message arrives after aborting */
- release_msg_context(msg_context);
- return ret;
- }
-
- *msg_out = msg_context->u.sync.msg;
- *msg_handle_out = msg_context->u.sync.msg_handle;
- release_msg_context(msg_context);
-
- return 0;
-}
-
-static void dump_port_info(struct vchiq_mmal_port *port)
-{
- pr_debug("port handle:0x%x enabled:%d\n", port->handle, port->enabled);
-
- pr_debug("buffer minimum num:%d size:%d align:%d\n",
- port->minimum_buffer.num,
- port->minimum_buffer.size, port->minimum_buffer.alignment);
-
- pr_debug("buffer recommended num:%d size:%d align:%d\n",
- port->recommended_buffer.num,
- port->recommended_buffer.size,
- port->recommended_buffer.alignment);
-
- pr_debug("buffer current values num:%d size:%d align:%d\n",
- port->current_buffer.num,
- port->current_buffer.size, port->current_buffer.alignment);
-
- pr_debug("elementary stream: type:%d encoding:0x%x variant:0x%x\n",
- port->format.type,
- port->format.encoding, port->format.encoding_variant);
-
- pr_debug(" bitrate:%d flags:0x%x\n",
- port->format.bitrate, port->format.flags);
-
- if (port->format.type == MMAL_ES_TYPE_VIDEO) {
- pr_debug
- ("es video format: width:%d height:%d colourspace:0x%x\n",
- port->es.video.width, port->es.video.height,
- port->es.video.color_space);
-
- pr_debug(" : crop xywh %d,%d,%d,%d\n",
- port->es.video.crop.x,
- port->es.video.crop.y,
- port->es.video.crop.width, port->es.video.crop.height);
- pr_debug(" : framerate %d/%d aspect %d/%d\n",
- port->es.video.frame_rate.num,
- port->es.video.frame_rate.den,
- port->es.video.par.num, port->es.video.par.den);
- }
-}
-
-static void port_to_mmal_msg(struct vchiq_mmal_port *port, struct mmal_port *p)
-{
- /* todo do readonly fields need setting at all? */
- p->type = port->type;
- p->index = port->index;
- p->index_all = 0;
- p->is_enabled = port->enabled;
- p->buffer_num_min = port->minimum_buffer.num;
- p->buffer_size_min = port->minimum_buffer.size;
- p->buffer_alignment_min = port->minimum_buffer.alignment;
- p->buffer_num_recommended = port->recommended_buffer.num;
- p->buffer_size_recommended = port->recommended_buffer.size;
-
- /* only three writable fields in a port */
- p->buffer_num = port->current_buffer.num;
- p->buffer_size = port->current_buffer.size;
- p->userdata = (u32)(unsigned long)port;
-}
-
-static int port_info_set(struct vchiq_mmal_instance *instance,
- struct vchiq_mmal_port *port)
-{
- int ret;
- struct mmal_msg m;
- struct mmal_msg *rmsg;
- VCHI_HELD_MSG_T rmsg_handle;
-
- pr_debug("setting port info port %p\n", port);
- if (!port)
- return -1;
- dump_port_info(port);
-
- m.h.type = MMAL_MSG_TYPE_PORT_INFO_SET;
-
- m.u.port_info_set.component_handle = port->component->handle;
- m.u.port_info_set.port_type = port->type;
- m.u.port_info_set.port_index = port->index;
-
- port_to_mmal_msg(port, &m.u.port_info_set.port);
-
- /* elementary stream format setup */
- m.u.port_info_set.format.type = port->format.type;
- m.u.port_info_set.format.encoding = port->format.encoding;
- m.u.port_info_set.format.encoding_variant =
- port->format.encoding_variant;
- m.u.port_info_set.format.bitrate = port->format.bitrate;
- m.u.port_info_set.format.flags = port->format.flags;
-
- memcpy(&m.u.port_info_set.es, &port->es,
- sizeof(union mmal_es_specific_format));
-
- m.u.port_info_set.format.extradata_size = port->format.extradata_size;
- memcpy(&m.u.port_info_set.extradata, port->format.extradata,
- port->format.extradata_size);
-
- ret = send_synchronous_mmal_msg(instance, &m,
- sizeof(m.u.port_info_set),
- &rmsg, &rmsg_handle);
- if (ret)
- return ret;
-
- if (rmsg->h.type != MMAL_MSG_TYPE_PORT_INFO_SET) {
- /* got an unexpected message type in reply */
- ret = -EINVAL;
- goto release_msg;
- }
-
- /* return operation status */
- ret = -rmsg->u.port_info_get_reply.status;
-
- pr_debug("%s:result:%d component:0x%x port:%d\n", __func__, ret,
- port->component->handle, port->handle);
-
-release_msg:
- vchi_held_msg_release(&rmsg_handle);
-
- return ret;
-}
-
-/* use port info get message to retrieve port information */
-static int port_info_get(struct vchiq_mmal_instance *instance,
- struct vchiq_mmal_port *port)
-{
- int ret;
- struct mmal_msg m;
- struct mmal_msg *rmsg;
- VCHI_HELD_MSG_T rmsg_handle;
-
- /* port info time */
- m.h.type = MMAL_MSG_TYPE_PORT_INFO_GET;
- m.u.port_info_get.component_handle = port->component->handle;
- m.u.port_info_get.port_type = port->type;
- m.u.port_info_get.index = port->index;
-
- ret = send_synchronous_mmal_msg(instance, &m,
- sizeof(m.u.port_info_get),
- &rmsg, &rmsg_handle);
- if (ret)
- return ret;
-
- if (rmsg->h.type != MMAL_MSG_TYPE_PORT_INFO_GET) {
- /* got an unexpected message type in reply */
- ret = -EINVAL;
- goto release_msg;
- }
-
- /* return operation status */
- ret = -rmsg->u.port_info_get_reply.status;
- if (ret != MMAL_MSG_STATUS_SUCCESS)
- goto release_msg;
-
- if (rmsg->u.port_info_get_reply.port.is_enabled == 0)
- port->enabled = false;
- else
- port->enabled = true;
-
- /* copy the values out of the message */
- port->handle = rmsg->u.port_info_get_reply.port_handle;
-
- /* port type and index cached to use on port info set because
- * it does not use a port handle
- */
- port->type = rmsg->u.port_info_get_reply.port_type;
- port->index = rmsg->u.port_info_get_reply.port_index;
-
- port->minimum_buffer.num =
- rmsg->u.port_info_get_reply.port.buffer_num_min;
- port->minimum_buffer.size =
- rmsg->u.port_info_get_reply.port.buffer_size_min;
- port->minimum_buffer.alignment =
- rmsg->u.port_info_get_reply.port.buffer_alignment_min;
-
- port->recommended_buffer.alignment =
- rmsg->u.port_info_get_reply.port.buffer_alignment_min;
- port->recommended_buffer.num =
- rmsg->u.port_info_get_reply.port.buffer_num_recommended;
-
- port->current_buffer.num = rmsg->u.port_info_get_reply.port.buffer_num;
- port->current_buffer.size =
- rmsg->u.port_info_get_reply.port.buffer_size;
-
- /* stream format */