477f6d2e17
Remove M_VCHIQ malloc type, now not used anywhere. Reviewed by: gonzo Approved by: kib (mentor)
2912 lines
78 KiB
C
2912 lines
78 KiB
C
/**
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* Copyright (c) 2014 Raspberry Pi (Trading) Ltd. All rights reserved.
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* Copyright (c) 2010-2012 Broadcom. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The names of the above-listed copyright holders may not be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* ALTERNATIVELY, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2, as published by the Free
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* Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "vchiq_core.h"
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#include "vchiq_ioctl.h"
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#include "vchiq_arm.h"
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#define DEVICE_NAME "vchiq"
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/* Override the default prefix, which would be vchiq_arm (from the filename) */
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#undef MODULE_PARAM_PREFIX
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#define MODULE_PARAM_PREFIX DEVICE_NAME "."
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#define VCHIQ_MINOR 0
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/* Some per-instance constants */
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#define MAX_COMPLETIONS 16
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#define MAX_SERVICES 64
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#define MAX_ELEMENTS 8
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#define MSG_QUEUE_SIZE 64
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#define KEEPALIVE_VER 1
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#define KEEPALIVE_VER_MIN KEEPALIVE_VER
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/* Run time control of log level, based on KERN_XXX level. */
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int vchiq_arm_log_level = VCHIQ_LOG_DEFAULT;
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int vchiq_susp_log_level = VCHIQ_LOG_ERROR;
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#define SUSPEND_TIMER_TIMEOUT_MS 100
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#define SUSPEND_RETRY_TIMER_TIMEOUT_MS 1000
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#define VC_SUSPEND_NUM_OFFSET 3 /* number of values before idle which are -ve */
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static const char *const suspend_state_names[] = {
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"VC_SUSPEND_FORCE_CANCELED",
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"VC_SUSPEND_REJECTED",
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"VC_SUSPEND_FAILED",
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"VC_SUSPEND_IDLE",
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"VC_SUSPEND_REQUESTED",
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"VC_SUSPEND_IN_PROGRESS",
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"VC_SUSPEND_SUSPENDED"
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};
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#define VC_RESUME_NUM_OFFSET 1 /* number of values before idle which are -ve */
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static const char *const resume_state_names[] = {
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"VC_RESUME_FAILED",
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"VC_RESUME_IDLE",
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"VC_RESUME_REQUESTED",
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"VC_RESUME_IN_PROGRESS",
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"VC_RESUME_RESUMED"
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};
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/* The number of times we allow force suspend to timeout before actually
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** _forcing_ suspend. This is to cater for SW which fails to release vchiq
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** correctly - we don't want to prevent ARM suspend indefinitely in this case.
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*/
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#define FORCE_SUSPEND_FAIL_MAX 8
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/* The time in ms allowed for videocore to go idle when force suspend has been
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* requested */
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#define FORCE_SUSPEND_TIMEOUT_MS 200
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static void suspend_timer_callback(unsigned long context);
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#ifdef notyet
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static int vchiq_proc_add_instance(VCHIQ_INSTANCE_T instance);
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static void vchiq_proc_remove_instance(VCHIQ_INSTANCE_T instance);
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#endif
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typedef struct user_service_struct {
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VCHIQ_SERVICE_T *service;
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void *userdata;
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VCHIQ_INSTANCE_T instance;
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char is_vchi;
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char dequeue_pending;
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char close_pending;
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int message_available_pos;
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int msg_insert;
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int msg_remove;
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struct semaphore insert_event;
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struct semaphore remove_event;
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struct semaphore close_event;
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VCHIQ_HEADER_T * msg_queue[MSG_QUEUE_SIZE];
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} USER_SERVICE_T;
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struct bulk_waiter_node {
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struct bulk_waiter bulk_waiter;
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int pid;
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struct list_head list;
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};
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struct vchiq_instance_struct {
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VCHIQ_STATE_T *state;
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VCHIQ_COMPLETION_DATA_T completions[MAX_COMPLETIONS];
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int completion_insert;
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int completion_remove;
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struct semaphore insert_event;
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struct semaphore remove_event;
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struct mutex completion_mutex;
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int connected;
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int closing;
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int pid;
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int mark;
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int use_close_delivered;
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int trace;
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struct list_head bulk_waiter_list;
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struct mutex bulk_waiter_list_mutex;
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#ifdef notyet
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VCHIQ_DEBUGFS_NODE_T proc_entry;
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#endif
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};
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typedef struct dump_context_struct {
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char __user *buf;
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size_t actual;
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size_t space;
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loff_t offset;
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} DUMP_CONTEXT_T;
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static struct cdev * vchiq_cdev;
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VCHIQ_STATE_T g_state;
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static DEFINE_SPINLOCK(msg_queue_spinlock);
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static const char *const ioctl_names[] = {
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"CONNECT",
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"SHUTDOWN",
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"CREATE_SERVICE",
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"REMOVE_SERVICE",
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"QUEUE_MESSAGE",
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"QUEUE_BULK_TRANSMIT",
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"QUEUE_BULK_RECEIVE",
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"AWAIT_COMPLETION",
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"DEQUEUE_MESSAGE",
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"GET_CLIENT_ID",
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"GET_CONFIG",
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"CLOSE_SERVICE",
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"USE_SERVICE",
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"RELEASE_SERVICE",
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"SET_SERVICE_OPTION",
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"DUMP_PHYS_MEM",
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"LIB_VERSION",
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"CLOSE_DELIVERED"
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};
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vchiq_static_assert((sizeof(ioctl_names)/sizeof(ioctl_names[0])) ==
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(VCHIQ_IOC_MAX + 1));
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static eventhandler_tag vchiq_ehtag = NULL;
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static d_open_t vchiq_open;
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static d_close_t vchiq_close;
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static d_ioctl_t vchiq_ioctl;
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static struct cdevsw vchiq_cdevsw = {
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.d_version = D_VERSION,
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.d_ioctl = vchiq_ioctl,
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.d_open = vchiq_open,
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.d_close = vchiq_close,
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.d_name = DEVICE_NAME,
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};
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#if 0
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static void
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dump_phys_mem(void *virt_addr, uint32_t num_bytes);
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#endif
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/****************************************************************************
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*
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* add_completion
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*
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***************************************************************************/
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static VCHIQ_STATUS_T
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add_completion(VCHIQ_INSTANCE_T instance, VCHIQ_REASON_T reason,
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VCHIQ_HEADER_T *header, USER_SERVICE_T *user_service,
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void *bulk_userdata)
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{
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VCHIQ_COMPLETION_DATA_T *completion;
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DEBUG_INITIALISE(g_state.local)
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while (instance->completion_insert ==
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(instance->completion_remove + MAX_COMPLETIONS)) {
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/* Out of space - wait for the client */
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DEBUG_TRACE(SERVICE_CALLBACK_LINE);
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vchiq_log_trace(vchiq_arm_log_level,
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"add_completion - completion queue full");
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DEBUG_COUNT(COMPLETION_QUEUE_FULL_COUNT);
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if (down_interruptible(&instance->remove_event) != 0) {
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vchiq_log_info(vchiq_arm_log_level,
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"service_callback interrupted");
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return VCHIQ_RETRY;
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} else if (instance->closing) {
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vchiq_log_info(vchiq_arm_log_level,
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"service_callback closing");
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return VCHIQ_ERROR;
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}
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DEBUG_TRACE(SERVICE_CALLBACK_LINE);
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}
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completion =
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&instance->completions[instance->completion_insert &
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(MAX_COMPLETIONS - 1)];
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completion->header = header;
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completion->reason = reason;
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/* N.B. service_userdata is updated while processing AWAIT_COMPLETION */
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completion->service_userdata = user_service->service;
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completion->bulk_userdata = bulk_userdata;
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if (reason == VCHIQ_SERVICE_CLOSED) {
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/* Take an extra reference, to be held until
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this CLOSED notification is delivered. */
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lock_service(user_service->service);
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if (instance->use_close_delivered)
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user_service->close_pending = 1;
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}
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/* A write barrier is needed here to ensure that the entire completion
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record is written out before the insert point. */
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wmb();
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if (reason == VCHIQ_MESSAGE_AVAILABLE)
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user_service->message_available_pos =
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instance->completion_insert;
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instance->completion_insert++;
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up(&instance->insert_event);
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return VCHIQ_SUCCESS;
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}
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/****************************************************************************
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*
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* service_callback
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*
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***************************************************************************/
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static VCHIQ_STATUS_T
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service_callback(VCHIQ_REASON_T reason, VCHIQ_HEADER_T *header,
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VCHIQ_SERVICE_HANDLE_T handle, void *bulk_userdata)
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{
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/* How do we ensure the callback goes to the right client?
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** The service_user data points to a USER_SERVICE_T record containing
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** the original callback and the user state structure, which contains a
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** circular buffer for completion records.
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*/
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USER_SERVICE_T *user_service;
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VCHIQ_SERVICE_T *service;
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VCHIQ_INSTANCE_T instance;
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DEBUG_INITIALISE(g_state.local)
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DEBUG_TRACE(SERVICE_CALLBACK_LINE);
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service = handle_to_service(handle);
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BUG_ON(!service);
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user_service = (USER_SERVICE_T *)service->base.userdata;
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instance = user_service->instance;
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if (!instance || instance->closing)
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return VCHIQ_SUCCESS;
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vchiq_log_trace(vchiq_arm_log_level,
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"service_callback - service %lx(%d,%p), reason %d, header %lx, "
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"instance %lx, bulk_userdata %lx",
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(unsigned long)user_service,
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service->localport, user_service->userdata,
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reason, (unsigned long)header,
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(unsigned long)instance, (unsigned long)bulk_userdata);
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if (header && user_service->is_vchi) {
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spin_lock(&msg_queue_spinlock);
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while (user_service->msg_insert ==
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(user_service->msg_remove + MSG_QUEUE_SIZE)) {
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spin_unlock(&msg_queue_spinlock);
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DEBUG_TRACE(SERVICE_CALLBACK_LINE);
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DEBUG_COUNT(MSG_QUEUE_FULL_COUNT);
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vchiq_log_trace(vchiq_arm_log_level,
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"service_callback - msg queue full");
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/* If there is no MESSAGE_AVAILABLE in the completion
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** queue, add one
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*/
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if ((user_service->message_available_pos -
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instance->completion_remove) < 0) {
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VCHIQ_STATUS_T status;
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vchiq_log_info(vchiq_arm_log_level,
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"Inserting extra MESSAGE_AVAILABLE");
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DEBUG_TRACE(SERVICE_CALLBACK_LINE);
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status = add_completion(instance, reason,
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NULL, user_service, bulk_userdata);
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if (status != VCHIQ_SUCCESS) {
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DEBUG_TRACE(SERVICE_CALLBACK_LINE);
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return status;
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}
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}
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DEBUG_TRACE(SERVICE_CALLBACK_LINE);
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if (down_interruptible(&user_service->remove_event)
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!= 0) {
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vchiq_log_info(vchiq_arm_log_level,
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"service_callback interrupted");
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DEBUG_TRACE(SERVICE_CALLBACK_LINE);
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return VCHIQ_RETRY;
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} else if (instance->closing) {
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vchiq_log_info(vchiq_arm_log_level,
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"service_callback closing");
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DEBUG_TRACE(SERVICE_CALLBACK_LINE);
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return VCHIQ_ERROR;
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}
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DEBUG_TRACE(SERVICE_CALLBACK_LINE);
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spin_lock(&msg_queue_spinlock);
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}
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user_service->msg_queue[user_service->msg_insert &
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(MSG_QUEUE_SIZE - 1)] = header;
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user_service->msg_insert++;
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spin_unlock(&msg_queue_spinlock);
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up(&user_service->insert_event);
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/* If there is a thread waiting in DEQUEUE_MESSAGE, or if
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** there is a MESSAGE_AVAILABLE in the completion queue then
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** bypass the completion queue.
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*/
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if (((user_service->message_available_pos -
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instance->completion_remove) >= 0) ||
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user_service->dequeue_pending) {
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DEBUG_TRACE(SERVICE_CALLBACK_LINE);
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user_service->dequeue_pending = 0;
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return VCHIQ_SUCCESS;
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}
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header = NULL;
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}
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DEBUG_TRACE(SERVICE_CALLBACK_LINE);
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return add_completion(instance, reason, header, user_service,
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bulk_userdata);
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}
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/****************************************************************************
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*
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* user_service_free
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*
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***************************************************************************/
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static void
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user_service_free(void *userdata)
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{
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USER_SERVICE_T *user_service = userdata;
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_sema_destroy(&user_service->insert_event);
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_sema_destroy(&user_service->remove_event);
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kfree(user_service);
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}
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/****************************************************************************
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*
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* close_delivered
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*
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***************************************************************************/
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static void close_delivered(USER_SERVICE_T *user_service)
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{
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vchiq_log_info(vchiq_arm_log_level,
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"close_delivered(handle=%x)",
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user_service->service->handle);
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if (user_service->close_pending) {
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/* Allow the underlying service to be culled */
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unlock_service(user_service->service);
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/* Wake the user-thread blocked in close_ or remove_service */
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up(&user_service->close_event);
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user_service->close_pending = 0;
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}
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}
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/****************************************************************************
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*
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* vchiq_ioctl
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*
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***************************************************************************/
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static int
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vchiq_ioctl(struct cdev *cdev, u_long cmd, caddr_t arg, int fflag,
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struct thread *td)
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{
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VCHIQ_INSTANCE_T instance;
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VCHIQ_STATUS_T status = VCHIQ_SUCCESS;
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VCHIQ_SERVICE_T *service = NULL;
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int ret = 0;
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int i, rc;
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DEBUG_INITIALISE(g_state.local)
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if ((ret = devfs_get_cdevpriv((void**)&instance))) {
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printf("vchiq_ioctl: devfs_get_cdevpriv failed: error %d\n", ret);
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return (ret);
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}
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/* XXXBSD: HACK! */
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#define _IOC_NR(x) ((x) & 0xff)
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#define _IOC_TYPE(x) IOCGROUP(x)
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vchiq_log_trace(vchiq_arm_log_level,
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"vchiq_ioctl - instance %x, cmd %s, arg %p",
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(unsigned int)instance,
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((_IOC_TYPE(cmd) == VCHIQ_IOC_MAGIC) &&
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(_IOC_NR(cmd) <= VCHIQ_IOC_MAX)) ?
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ioctl_names[_IOC_NR(cmd)] : "<invalid>", arg);
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switch (cmd) {
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case VCHIQ_IOC_SHUTDOWN:
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if (!instance->connected)
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break;
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/* Remove all services */
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i = 0;
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while ((service = next_service_by_instance(instance->state,
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instance, &i)) != NULL) {
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status = vchiq_remove_service(service->handle);
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unlock_service(service);
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if (status != VCHIQ_SUCCESS)
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break;
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}
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service = NULL;
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if (status == VCHIQ_SUCCESS) {
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/* Wake the completion thread and ask it to exit */
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instance->closing = 1;
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up(&instance->insert_event);
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}
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break;
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case VCHIQ_IOC_CONNECT:
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if (instance->connected) {
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ret = -EINVAL;
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break;
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}
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rc = lmutex_lock_interruptible(&instance->state->mutex);
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if (rc != 0) {
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vchiq_log_error(vchiq_arm_log_level,
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"vchiq: connect: could not lock mutex for "
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"state %d: %d",
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instance->state->id, rc);
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ret = -EINTR;
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break;
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}
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status = vchiq_connect_internal(instance->state, instance);
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lmutex_unlock(&instance->state->mutex);
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if (status == VCHIQ_SUCCESS)
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instance->connected = 1;
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else
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vchiq_log_error(vchiq_arm_log_level,
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"vchiq: could not connect: %d", status);
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break;
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case VCHIQ_IOC_CREATE_SERVICE: {
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VCHIQ_CREATE_SERVICE_T args;
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USER_SERVICE_T *user_service = NULL;
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void *userdata;
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int srvstate;
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memcpy(&args, (const void*)arg, sizeof(args));
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user_service = kmalloc(sizeof(USER_SERVICE_T), GFP_KERNEL);
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if (!user_service) {
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ret = -ENOMEM;
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break;
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}
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if (args.is_open) {
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if (!instance->connected) {
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ret = -ENOTCONN;
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kfree(user_service);
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break;
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}
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srvstate = VCHIQ_SRVSTATE_OPENING;
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} else {
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srvstate =
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instance->connected ?
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VCHIQ_SRVSTATE_LISTENING :
|
|
VCHIQ_SRVSTATE_HIDDEN;
|
|
}
|
|
|
|
userdata = args.params.userdata;
|
|
args.params.callback = service_callback;
|
|
args.params.userdata = user_service;
|
|
service = vchiq_add_service_internal(
|
|
instance->state,
|
|
&args.params, srvstate,
|
|
instance, user_service_free);
|
|
|
|
if (service != NULL) {
|
|
user_service->service = service;
|
|
user_service->userdata = userdata;
|
|
user_service->instance = instance;
|
|
user_service->is_vchi = (args.is_vchi != 0);
|
|
user_service->dequeue_pending = 0;
|
|
user_service->close_pending = 0;
|
|
user_service->message_available_pos =
|
|
instance->completion_remove - 1;
|
|
user_service->msg_insert = 0;
|
|
user_service->msg_remove = 0;
|
|
_sema_init(&user_service->insert_event, 0);
|
|
_sema_init(&user_service->remove_event, 0);
|
|
_sema_init(&user_service->close_event, 0);
|
|
|
|
if (args.is_open) {
|
|
status = vchiq_open_service_internal
|
|
(service, instance->pid);
|
|
if (status != VCHIQ_SUCCESS) {
|
|
vchiq_remove_service(service->handle);
|
|
service = NULL;
|
|
ret = (status == VCHIQ_RETRY) ?
|
|
-EINTR : -EIO;
|
|
break;
|
|
}
|
|
}
|
|
|
|
#ifdef VCHIQ_IOCTL_DEBUG
|
|
printf("%s: [CREATE SERVICE] handle = %08x\n", __func__, service->handle);
|
|
#endif
|
|
memcpy((void *)
|
|
&(((VCHIQ_CREATE_SERVICE_T*)
|
|
arg)->handle),
|
|
(const void *)&service->handle,
|
|
sizeof(service->handle));
|
|
|
|
service = NULL;
|
|
} else {
|
|
ret = -EEXIST;
|
|
kfree(user_service);
|
|
}
|
|
} break;
|
|
|
|
case VCHIQ_IOC_CLOSE_SERVICE: {
|
|
VCHIQ_SERVICE_HANDLE_T handle;
|
|
|
|
memcpy(&handle, (const void*)arg, sizeof(handle));
|
|
|
|
#ifdef VCHIQ_IOCTL_DEBUG
|
|
printf("%s: [CLOSE SERVICE] handle = %08x\n", __func__, handle);
|
|
#endif
|
|
|
|
service = find_service_for_instance(instance, handle);
|
|
if (service != NULL) {
|
|
USER_SERVICE_T *user_service =
|
|
(USER_SERVICE_T *)service->base.userdata;
|
|
/* close_pending is false on first entry, and when the
|
|
wait in vchiq_close_service has been interrupted. */
|
|
if (!user_service->close_pending) {
|
|
status = vchiq_close_service(service->handle);
|
|
if (status != VCHIQ_SUCCESS)
|
|
break;
|
|
}
|
|
|
|
/* close_pending is true once the underlying service
|
|
has been closed until the client library calls the
|
|
CLOSE_DELIVERED ioctl, signalling close_event. */
|
|
if (user_service->close_pending &&
|
|
down_interruptible(&user_service->close_event))
|
|
status = VCHIQ_RETRY;
|
|
}
|
|
else
|
|
ret = -EINVAL;
|
|
} break;
|
|
|
|
case VCHIQ_IOC_REMOVE_SERVICE: {
|
|
VCHIQ_SERVICE_HANDLE_T handle;
|
|
|
|
memcpy(&handle, (const void*)arg, sizeof(handle));
|
|
|
|
#ifdef VCHIQ_IOCTL_DEBUG
|
|
printf("%s: [REMOVE SERVICE] handle = %08x\n", __func__, handle);
|
|
#endif
|
|
|
|
service = find_service_for_instance(instance, handle);
|
|
if (service != NULL) {
|
|
USER_SERVICE_T *user_service =
|
|
(USER_SERVICE_T *)service->base.userdata;
|
|
/* close_pending is false on first entry, and when the
|
|
wait in vchiq_close_service has been interrupted. */
|
|
if (!user_service->close_pending) {
|
|
status = vchiq_remove_service(service->handle);
|
|
if (status != VCHIQ_SUCCESS)
|
|
break;
|
|
}
|
|
|
|
/* close_pending is true once the underlying service
|
|
has been closed until the client library calls the
|
|
CLOSE_DELIVERED ioctl, signalling close_event. */
|
|
if (user_service->close_pending &&
|
|
down_interruptible(&user_service->close_event))
|
|
status = VCHIQ_RETRY;
|
|
}
|
|
else
|
|
ret = -EINVAL;
|
|
} break;
|
|
|
|
case VCHIQ_IOC_USE_SERVICE:
|
|
case VCHIQ_IOC_RELEASE_SERVICE: {
|
|
VCHIQ_SERVICE_HANDLE_T handle;
|
|
|
|
memcpy(&handle, (const void*)arg, sizeof(handle));
|
|
|
|
#ifdef VCHIQ_IOCTL_DEBUG
|
|
printf("%s: [%s SERVICE] handle = %08x\n", __func__,
|
|
cmd == VCHIQ_IOC_USE_SERVICE ? "USE" : "RELEASE", handle);
|
|
#endif
|
|
|
|
service = find_service_for_instance(instance, handle);
|
|
if (service != NULL) {
|
|
status = (cmd == VCHIQ_IOC_USE_SERVICE) ?
|
|
vchiq_use_service_internal(service) :
|
|
vchiq_release_service_internal(service);
|
|
if (status != VCHIQ_SUCCESS) {
|
|
vchiq_log_error(vchiq_susp_log_level,
|
|
"%s: cmd %s returned error %d for "
|
|
"service %c%c%c%c:%8x",
|
|
__func__,
|
|
(cmd == VCHIQ_IOC_USE_SERVICE) ?
|
|
"VCHIQ_IOC_USE_SERVICE" :
|
|
"VCHIQ_IOC_RELEASE_SERVICE",
|
|
status,
|
|
VCHIQ_FOURCC_AS_4CHARS(
|
|
service->base.fourcc),
|
|
service->client_id);
|
|
ret = -EINVAL;
|
|
}
|
|
} else
|
|
ret = -EINVAL;
|
|
} break;
|
|
|
|
case VCHIQ_IOC_QUEUE_MESSAGE: {
|
|
VCHIQ_QUEUE_MESSAGE_T args;
|
|
memcpy(&args, (const void*)arg, sizeof(args));
|
|
|
|
#ifdef VCHIQ_IOCTL_DEBUG
|
|
printf("%s: [QUEUE MESSAGE] handle = %08x\n", __func__, args.handle);
|
|
#endif
|
|
|
|
service = find_service_for_instance(instance, args.handle);
|
|
|
|
if ((service != NULL) && (args.count <= MAX_ELEMENTS)) {
|
|
/* Copy elements into kernel space */
|
|
VCHIQ_ELEMENT_T elements[MAX_ELEMENTS];
|
|
if (copy_from_user(elements, args.elements,
|
|
args.count * sizeof(VCHIQ_ELEMENT_T)) == 0)
|
|
status = vchiq_queue_message
|
|
(args.handle,
|
|
elements, args.count);
|
|
else
|
|
ret = -EFAULT;
|
|
} else {
|
|
ret = -EINVAL;
|
|
}
|
|
} break;
|
|
|
|
case VCHIQ_IOC_QUEUE_BULK_TRANSMIT:
|
|
case VCHIQ_IOC_QUEUE_BULK_RECEIVE: {
|
|
VCHIQ_QUEUE_BULK_TRANSFER_T args;
|
|
struct bulk_waiter_node *waiter = NULL;
|
|
VCHIQ_BULK_DIR_T dir =
|
|
(cmd == VCHIQ_IOC_QUEUE_BULK_TRANSMIT) ?
|
|
VCHIQ_BULK_TRANSMIT : VCHIQ_BULK_RECEIVE;
|
|
|
|
memcpy(&args, (const void*)arg, sizeof(args));
|
|
|
|
service = find_service_for_instance(instance, args.handle);
|
|
if (!service) {
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
if (args.mode == VCHIQ_BULK_MODE_BLOCKING) {
|
|
waiter = kzalloc(sizeof(struct bulk_waiter_node),
|
|
GFP_KERNEL);
|
|
if (!waiter) {
|
|
ret = -ENOMEM;
|
|
break;
|
|
}
|
|
args.userdata = &waiter->bulk_waiter;
|
|
} else if (args.mode == VCHIQ_BULK_MODE_WAITING) {
|
|
struct list_head *pos;
|
|
lmutex_lock(&instance->bulk_waiter_list_mutex);
|
|
list_for_each(pos, &instance->bulk_waiter_list) {
|
|
if (list_entry(pos, struct bulk_waiter_node,
|
|
list)->pid == current->p_pid) {
|
|
waiter = list_entry(pos,
|
|
struct bulk_waiter_node,
|
|
list);
|
|
list_del(pos);
|
|
break;
|
|
}
|
|
|
|
}
|
|
lmutex_unlock(&instance->bulk_waiter_list_mutex);
|
|
if (!waiter) {
|
|
vchiq_log_error(vchiq_arm_log_level,
|
|
"no bulk_waiter found for pid %d",
|
|
current->p_pid);
|
|
ret = -ESRCH;
|
|
break;
|
|
}
|
|
vchiq_log_info(vchiq_arm_log_level,
|
|
"found bulk_waiter %x for pid %d",
|
|
(unsigned int)waiter, current->p_pid);
|
|
args.userdata = &waiter->bulk_waiter;
|
|
}
|
|
status = vchiq_bulk_transfer
|
|
(args.handle,
|
|
VCHI_MEM_HANDLE_INVALID,
|
|
args.data, args.size,
|
|
args.userdata, args.mode,
|
|
dir);
|
|
if (!waiter)
|
|
break;
|
|
if ((status != VCHIQ_RETRY) || fatal_signal_pending(current) ||
|
|
!waiter->bulk_waiter.bulk) {
|
|
if (waiter->bulk_waiter.bulk) {
|
|
/* Cancel the signal when the transfer
|
|
** completes. */
|
|
spin_lock(&bulk_waiter_spinlock);
|
|
waiter->bulk_waiter.bulk->userdata = NULL;
|
|
spin_unlock(&bulk_waiter_spinlock);
|
|
}
|
|
_sema_destroy(&waiter->bulk_waiter.event);
|
|
kfree(waiter);
|
|
} else {
|
|
const VCHIQ_BULK_MODE_T mode_waiting =
|
|
VCHIQ_BULK_MODE_WAITING;
|
|
waiter->pid = current->p_pid;
|
|
lmutex_lock(&instance->bulk_waiter_list_mutex);
|
|
list_add(&waiter->list, &instance->bulk_waiter_list);
|
|
lmutex_unlock(&instance->bulk_waiter_list_mutex);
|
|
vchiq_log_info(vchiq_arm_log_level,
|
|
"saved bulk_waiter %x for pid %d",
|
|
(unsigned int)waiter, current->p_pid);
|
|
|
|
memcpy((void *)
|
|
&(((VCHIQ_QUEUE_BULK_TRANSFER_T *)
|
|
arg)->mode),
|
|
(const void *)&mode_waiting,
|
|
sizeof(mode_waiting));
|
|
}
|
|
} break;
|
|
|
|
case VCHIQ_IOC_AWAIT_COMPLETION: {
|
|
VCHIQ_AWAIT_COMPLETION_T args;
|
|
int count = 0;
|
|
|
|
DEBUG_TRACE(AWAIT_COMPLETION_LINE);
|
|
if (!instance->connected) {
|
|
ret = -ENOTCONN;
|
|
break;
|
|
}
|
|
|
|
memcpy(&args, (const void*)arg, sizeof(args));
|
|
|
|
lmutex_lock(&instance->completion_mutex);
|
|
|
|
DEBUG_TRACE(AWAIT_COMPLETION_LINE);
|
|
while ((instance->completion_remove ==
|
|
instance->completion_insert)
|
|
&& !instance->closing) {
|
|
DEBUG_TRACE(AWAIT_COMPLETION_LINE);
|
|
lmutex_unlock(&instance->completion_mutex);
|
|
rc = down_interruptible(&instance->insert_event);
|
|
lmutex_lock(&instance->completion_mutex);
|
|
if (rc != 0) {
|
|
DEBUG_TRACE(AWAIT_COMPLETION_LINE);
|
|
vchiq_log_info(vchiq_arm_log_level,
|
|
"AWAIT_COMPLETION interrupted");
|
|
ret = -EINTR;
|
|
break;
|
|
}
|
|
}
|
|
DEBUG_TRACE(AWAIT_COMPLETION_LINE);
|
|
|
|
/* A read memory barrier is needed to stop prefetch of a stale
|
|
** completion record
|
|
*/
|
|
rmb();
|
|
|
|
if (ret == 0) {
|
|
int msgbufcount = args.msgbufcount;
|
|
for (count = 0; count < args.count; count++) {
|
|
VCHIQ_COMPLETION_DATA_T *completion;
|
|
VCHIQ_SERVICE_T *service1;
|
|
USER_SERVICE_T *user_service;
|
|
VCHIQ_HEADER_T *header;
|
|
if (instance->completion_remove ==
|
|
instance->completion_insert)
|
|
break;
|
|
completion = &instance->completions[
|
|
instance->completion_remove &
|
|
(MAX_COMPLETIONS - 1)];
|
|
|
|
service1 = completion->service_userdata;
|
|
user_service = service1->base.userdata;
|
|
completion->service_userdata =
|
|
user_service->userdata;
|
|
|
|
header = completion->header;
|
|
if (header) {
|
|
void __user *msgbuf;
|
|
int msglen;
|
|
|
|
msglen = header->size +
|
|
sizeof(VCHIQ_HEADER_T);
|
|
/* This must be a VCHIQ-style service */
|
|
if (args.msgbufsize < msglen) {
|
|
vchiq_log_error(
|
|
vchiq_arm_log_level,
|
|
"header %x: msgbufsize"
|
|
" %x < msglen %x",
|
|
(unsigned int)header,
|
|
args.msgbufsize,
|
|
msglen);
|
|
WARN(1, "invalid message "
|
|
"size\n");
|
|
if (count == 0)
|
|
ret = -EMSGSIZE;
|
|
break;
|
|
}
|
|
if (msgbufcount <= 0)
|
|
/* Stall here for lack of a
|
|
** buffer for the message. */
|
|
break;
|
|
/* Get the pointer from user space */
|
|
msgbufcount--;
|
|
if (copy_from_user(&msgbuf,
|
|
(const void __user *)
|
|
&args.msgbufs[msgbufcount],
|
|
sizeof(msgbuf)) != 0) {
|
|
if (count == 0)
|
|
ret = -EFAULT;
|
|
break;
|
|
}
|
|
|
|
/* Copy the message to user space */
|
|
if (copy_to_user(msgbuf, header,
|
|
msglen) != 0) {
|
|
if (count == 0)
|
|
ret = -EFAULT;
|
|
break;
|
|
}
|
|
|
|
/* Now it has been copied, the message
|
|
** can be released. */
|
|
vchiq_release_message(service1->handle,
|
|
header);
|
|
|
|
/* The completion must point to the
|
|
** msgbuf. */
|
|
completion->header = msgbuf;
|
|
}
|
|
|
|
if ((completion->reason ==
|
|
VCHIQ_SERVICE_CLOSED) &&
|
|
!instance->use_close_delivered)
|
|
unlock_service(service1);
|
|
|
|
if (copy_to_user((void __user *)(
|
|
(size_t)args.buf +
|
|
count * sizeof(VCHIQ_COMPLETION_DATA_T)),
|
|
completion,
|
|
sizeof(VCHIQ_COMPLETION_DATA_T)) != 0) {
|
|
if (ret == 0)
|
|
ret = -EFAULT;
|
|
break;
|
|
}
|
|
|
|
instance->completion_remove++;
|
|
}
|
|
|
|
if (msgbufcount != args.msgbufcount) {
|
|
memcpy((void __user *)
|
|
&((VCHIQ_AWAIT_COMPLETION_T *)arg)->
|
|
msgbufcount,
|
|
&msgbufcount,
|
|
sizeof(msgbufcount));
|
|
}
|
|
|
|
if (count != args.count)
|
|
{
|
|
memcpy((void __user *)
|
|
&((VCHIQ_AWAIT_COMPLETION_T *)arg)->count,
|
|
&count, sizeof(count));
|
|
}
|
|
}
|
|
|
|
if (count != 0)
|
|
up(&instance->remove_event);
|
|
|
|
if ((ret == 0) && instance->closing)
|
|
ret = -ENOTCONN;
|
|
/*
|
|
* XXXBSD: ioctl return codes are not negative as in linux, so
|
|
* we can not indicate success with positive number of passed
|
|
* messages
|
|
*/
|
|
if (ret > 0)
|
|
ret = 0;
|
|
|
|
lmutex_unlock(&instance->completion_mutex);
|
|
DEBUG_TRACE(AWAIT_COMPLETION_LINE);
|
|
} break;
|
|
|
|
case VCHIQ_IOC_DEQUEUE_MESSAGE: {
|
|
VCHIQ_DEQUEUE_MESSAGE_T args;
|
|
USER_SERVICE_T *user_service;
|
|
VCHIQ_HEADER_T *header;
|
|
|
|
DEBUG_TRACE(DEQUEUE_MESSAGE_LINE);
|
|
memcpy(&args, (const void*)arg, sizeof(args));
|
|
service = find_service_for_instance(instance, args.handle);
|
|
if (!service) {
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
user_service = (USER_SERVICE_T *)service->base.userdata;
|
|
if (user_service->is_vchi == 0) {
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
spin_lock(&msg_queue_spinlock);
|
|
if (user_service->msg_remove == user_service->msg_insert) {
|
|
if (!args.blocking) {
|
|
spin_unlock(&msg_queue_spinlock);
|
|
DEBUG_TRACE(DEQUEUE_MESSAGE_LINE);
|
|
ret = -EWOULDBLOCK;
|
|
break;
|
|
}
|
|
user_service->dequeue_pending = 1;
|
|
do {
|
|
spin_unlock(&msg_queue_spinlock);
|
|
DEBUG_TRACE(DEQUEUE_MESSAGE_LINE);
|
|
if (down_interruptible(
|
|
&user_service->insert_event) != 0) {
|
|
vchiq_log_info(vchiq_arm_log_level,
|
|
"DEQUEUE_MESSAGE interrupted");
|
|
ret = -EINTR;
|
|
break;
|
|
}
|
|
spin_lock(&msg_queue_spinlock);
|
|
} while (user_service->msg_remove ==
|
|
user_service->msg_insert);
|
|
|
|
if (ret)
|
|
break;
|
|
}
|
|
|
|
BUG_ON((int)(user_service->msg_insert -
|
|
user_service->msg_remove) < 0);
|
|
|
|
header = user_service->msg_queue[user_service->msg_remove &
|
|
(MSG_QUEUE_SIZE - 1)];
|
|
user_service->msg_remove++;
|
|
spin_unlock(&msg_queue_spinlock);
|
|
|
|
up(&user_service->remove_event);
|
|
if (header == NULL)
|
|
ret = -ENOTCONN;
|
|
else if (header->size <= args.bufsize) {
|
|
/* Copy to user space if msgbuf is not NULL */
|
|
if ((args.buf == NULL) ||
|
|
(copy_to_user((void __user *)args.buf,
|
|
header->data,
|
|
header->size) == 0)) {
|
|
args.bufsize = header->size;
|
|
memcpy((void *)arg, &args,
|
|
sizeof(args));
|
|
vchiq_release_message(
|
|
service->handle,
|
|
header);
|
|
} else
|
|
ret = -EFAULT;
|
|
} else {
|
|
vchiq_log_error(vchiq_arm_log_level,
|
|
"header %x: bufsize %x < size %x",
|
|
(unsigned int)header, args.bufsize,
|
|
header->size);
|
|
WARN(1, "invalid size\n");
|
|
ret = -EMSGSIZE;
|
|
}
|
|
DEBUG_TRACE(DEQUEUE_MESSAGE_LINE);
|
|
} break;
|
|
|
|
case VCHIQ_IOC_GET_CLIENT_ID: {
|
|
VCHIQ_SERVICE_HANDLE_T handle;
|
|
|
|
memcpy(&handle, (const void*)arg, sizeof(handle));
|
|
|
|
ret = vchiq_get_client_id(handle);
|
|
} break;
|
|
|
|
case VCHIQ_IOC_GET_CONFIG: {
|
|
VCHIQ_GET_CONFIG_T args;
|
|
VCHIQ_CONFIG_T config;
|
|
|
|
memcpy(&args, (const void*)arg, sizeof(args));
|
|
if (args.config_size > sizeof(config)) {
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
status = vchiq_get_config(instance, args.config_size, &config);
|
|
if (status == VCHIQ_SUCCESS) {
|
|
if (copy_to_user((void __user *)args.pconfig,
|
|
&config, args.config_size) != 0) {
|
|
ret = -EFAULT;
|
|
break;
|
|
}
|
|
}
|
|
} break;
|
|
|
|
case VCHIQ_IOC_SET_SERVICE_OPTION: {
|
|
VCHIQ_SET_SERVICE_OPTION_T args;
|
|
|
|
memcpy(&args, (const void*)arg, sizeof(args));
|
|
|
|
service = find_service_for_instance(instance, args.handle);
|
|
if (!service) {
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
status = vchiq_set_service_option(
|
|
args.handle, args.option, args.value);
|
|
} break;
|
|
|
|
case VCHIQ_IOC_DUMP_PHYS_MEM: {
|
|
VCHIQ_DUMP_MEM_T args;
|
|
|
|
memcpy(&args, (const void*)arg, sizeof(args));
|
|
printf("IMPLEMENT ME: %s:%d\n", __FILE__, __LINE__);
|
|
#if 0
|
|
dump_phys_mem(args.virt_addr, args.num_bytes);
|
|
#endif
|
|
} break;
|
|
|
|
case VCHIQ_IOC_LIB_VERSION: {
|
|
unsigned int lib_version = (unsigned int)arg;
|
|
|
|
if (lib_version < VCHIQ_VERSION_MIN)
|
|
ret = -EINVAL;
|
|
else if (lib_version >= VCHIQ_VERSION_CLOSE_DELIVERED)
|
|
instance->use_close_delivered = 1;
|
|
} break;
|
|
|
|
case VCHIQ_IOC_CLOSE_DELIVERED: {
|
|
VCHIQ_SERVICE_HANDLE_T handle;
|
|
memcpy(&handle, (const void*)arg, sizeof(handle));
|
|
|
|
service = find_closed_service_for_instance(instance, handle);
|
|
if (service != NULL) {
|
|
USER_SERVICE_T *user_service =
|
|
(USER_SERVICE_T *)service->base.userdata;
|
|
close_delivered(user_service);
|
|
}
|
|
else
|
|
ret = -EINVAL;
|
|
} break;
|
|
|
|
default:
|
|
ret = -ENOTTY;
|
|
break;
|
|
}
|
|
|
|
if (service)
|
|
unlock_service(service);
|
|
|
|
if (ret == 0) {
|
|
if (status == VCHIQ_ERROR)
|
|
ret = -EIO;
|
|
else if (status == VCHIQ_RETRY)
|
|
ret = -EINTR;
|
|
}
|
|
|
|
if ((status == VCHIQ_SUCCESS) && (ret < 0) && (ret != -EINTR) &&
|
|
(ret != -EWOULDBLOCK))
|
|
vchiq_log_info(vchiq_arm_log_level,
|
|
" ioctl instance %lx, cmd %s -> status %d, %d",
|
|
(unsigned long)instance,
|
|
(_IOC_NR(cmd) <= VCHIQ_IOC_MAX) ?
|
|
ioctl_names[_IOC_NR(cmd)] :
|
|
"<invalid>",
|
|
status, ret);
|
|
else
|
|
vchiq_log_trace(vchiq_arm_log_level,
|
|
" ioctl instance %lx, cmd %s -> status %d, %d",
|
|
(unsigned long)instance,
|
|
(_IOC_NR(cmd) <= VCHIQ_IOC_MAX) ?
|
|
ioctl_names[_IOC_NR(cmd)] :
|
|
"<invalid>",
|
|
status, ret);
|
|
|
|
/* XXXBSD: report BSD-style error to userland */
|
|
if (ret < 0)
|
|
ret = -ret;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
instance_dtr(void *data)
|
|
{
|
|
|
|
kfree(data);
|
|
}
|
|
|
|
/****************************************************************************
|
|
*
|
|
* vchiq_open
|
|
*
|
|
***************************************************************************/
|
|
|
|
static int
|
|
vchiq_open(struct cdev *dev, int flags, int fmt __unused, struct thread *td)
|
|
{
|
|
vchiq_log_info(vchiq_arm_log_level, "vchiq_open");
|
|
/* XXXBSD: do we really need this check? */
|
|
if (1) {
|
|
VCHIQ_STATE_T *state = vchiq_get_state();
|
|
VCHIQ_INSTANCE_T instance;
|
|
|
|
if (!state) {
|
|
vchiq_log_error(vchiq_arm_log_level,
|
|
"vchiq has no connection to VideoCore");
|
|
return -ENOTCONN;
|
|
}
|
|
|
|
instance = kmalloc(sizeof(*instance), GFP_KERNEL);
|
|
if (!instance)
|
|
return -ENOMEM;
|
|
|
|
instance->state = state;
|
|
/* XXXBSD: PID or thread ID? */
|
|
instance->pid = td->td_proc->p_pid;
|
|
|
|
#ifdef notyet
|
|
ret = vchiq_proc_add_instance(instance);
|
|
if (ret != 0) {
|
|
kfree(instance);
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
_sema_init(&instance->insert_event, 0);
|
|
_sema_init(&instance->remove_event, 0);
|
|
lmutex_init(&instance->completion_mutex);
|
|
lmutex_init(&instance->bulk_waiter_list_mutex);
|
|
INIT_LIST_HEAD(&instance->bulk_waiter_list);
|
|
|
|
devfs_set_cdevpriv(instance, instance_dtr);
|
|
}
|
|
else {
|
|
vchiq_log_error(vchiq_arm_log_level,
|
|
"Unknown minor device");
|
|
return -ENXIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/****************************************************************************
|
|
*
|
|
* vchiq_release
|
|
*
|
|
***************************************************************************/
|
|
|
|
static int
|
|
vchiq_close(struct cdev *dev, int flags __unused, int fmt __unused,
|
|
struct thread *td)
|
|
{
|
|
int ret = 0;
|
|
if (1) {
|
|
VCHIQ_INSTANCE_T instance;
|
|
VCHIQ_STATE_T *state = vchiq_get_state();
|
|
VCHIQ_SERVICE_T *service;
|
|
int i;
|
|
|
|
if ((ret = devfs_get_cdevpriv((void**)&instance))) {
|
|
printf("devfs_get_cdevpriv failed: error %d\n", ret);
|
|
return (ret);
|
|
}
|
|
|
|
vchiq_log_info(vchiq_arm_log_level,
|
|
"vchiq_release: instance=%lx",
|
|
(unsigned long)instance);
|
|
|
|
if (!state) {
|
|
ret = -EPERM;
|
|
goto out;
|
|
}
|
|
|
|
/* Ensure videocore is awake to allow termination. */
|
|
vchiq_use_internal(instance->state, NULL,
|
|
USE_TYPE_VCHIQ);
|
|
|
|
lmutex_lock(&instance->completion_mutex);
|
|
|
|
/* Wake the completion thread and ask it to exit */
|
|
instance->closing = 1;
|
|
up(&instance->insert_event);
|
|
|
|
lmutex_unlock(&instance->completion_mutex);
|
|
|
|
/* Wake the slot handler if the completion queue is full. */
|
|
up(&instance->remove_event);
|
|
|
|
/* Mark all services for termination... */
|
|
i = 0;
|
|
while ((service = next_service_by_instance(state, instance,
|
|
&i)) != NULL) {
|
|
USER_SERVICE_T *user_service = service->base.userdata;
|
|
|
|
/* Wake the slot handler if the msg queue is full. */
|
|
up(&user_service->remove_event);
|
|
|
|
vchiq_terminate_service_internal(service);
|
|
unlock_service(service);
|
|
}
|
|
|
|
/* ...and wait for them to die */
|
|
i = 0;
|
|
while ((service = next_service_by_instance(state, instance, &i))
|
|
!= NULL) {
|
|
USER_SERVICE_T *user_service = service->base.userdata;
|
|
|
|
down(&service->remove_event);
|
|
|
|
BUG_ON(service->srvstate != VCHIQ_SRVSTATE_FREE);
|
|
|
|
spin_lock(&msg_queue_spinlock);
|
|
|
|
while (user_service->msg_remove !=
|
|
user_service->msg_insert) {
|
|
VCHIQ_HEADER_T *header = user_service->
|
|
msg_queue[user_service->msg_remove &
|
|
(MSG_QUEUE_SIZE - 1)];
|
|
user_service->msg_remove++;
|
|
spin_unlock(&msg_queue_spinlock);
|
|
|
|
if (header)
|
|
vchiq_release_message(
|
|
service->handle,
|
|
header);
|
|
spin_lock(&msg_queue_spinlock);
|
|
}
|
|
|
|
spin_unlock(&msg_queue_spinlock);
|
|
|
|
unlock_service(service);
|
|
}
|
|
|
|
/* Release any closed services */
|
|
while (instance->completion_remove !=
|
|
instance->completion_insert) {
|
|
VCHIQ_COMPLETION_DATA_T *completion;
|
|
VCHIQ_SERVICE_T *service1;
|
|
completion = &instance->completions[
|
|
instance->completion_remove &
|
|
(MAX_COMPLETIONS - 1)];
|
|
service1 = completion->service_userdata;
|
|
if (completion->reason == VCHIQ_SERVICE_CLOSED)
|
|
{
|
|
USER_SERVICE_T *user_service =
|
|
service->base.userdata;
|
|
|
|
/* Wake any blocked user-thread */
|
|
if (instance->use_close_delivered)
|
|
up(&user_service->close_event);
|
|
unlock_service(service1);
|
|
}
|
|
instance->completion_remove++;
|
|
}
|
|
|
|
/* Release the PEER service count. */
|
|
vchiq_release_internal(instance->state, NULL);
|
|
|
|
{
|
|
struct list_head *pos, *next;
|
|
list_for_each_safe(pos, next,
|
|
&instance->bulk_waiter_list) {
|
|
struct bulk_waiter_node *waiter;
|
|
waiter = list_entry(pos,
|
|
struct bulk_waiter_node,
|
|
list);
|
|
list_del(pos);
|
|
vchiq_log_info(vchiq_arm_log_level,
|
|
"bulk_waiter - cleaned up %x "
|
|
"for pid %d",
|
|
(unsigned int)waiter, waiter->pid);
|
|
_sema_destroy(&waiter->bulk_waiter.event);
|
|
kfree(waiter);
|
|
}
|
|
}
|
|
|
|
}
|
|
else {
|
|
vchiq_log_error(vchiq_arm_log_level,
|
|
"Unknown minor device");
|
|
ret = -ENXIO;
|
|
}
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/****************************************************************************
|
|
*
|
|
* vchiq_dump
|
|
*
|
|
***************************************************************************/
|
|
|
|
void
|
|
vchiq_dump(void *dump_context, const char *str, int len)
|
|
{
|
|
DUMP_CONTEXT_T *context = (DUMP_CONTEXT_T *)dump_context;
|
|
|
|
if (context->actual < context->space) {
|
|
int copy_bytes;
|
|
if (context->offset > 0) {
|
|
int skip_bytes = min(len, (int)context->offset);
|
|
str += skip_bytes;
|
|
len -= skip_bytes;
|
|
context->offset -= skip_bytes;
|
|
if (context->offset > 0)
|
|
return;
|
|
}
|
|
copy_bytes = min(len, (int)(context->space - context->actual));
|
|
if (copy_bytes == 0)
|
|
return;
|
|
memcpy(context->buf + context->actual, str, copy_bytes);
|
|
context->actual += copy_bytes;
|
|
len -= copy_bytes;
|
|
|
|
/* If tne terminating NUL is included in the length, then it
|
|
** marks the end of a line and should be replaced with a
|
|
** carriage return. */
|
|
if ((len == 0) && (str[copy_bytes - 1] == '\0')) {
|
|
char cr = '\n';
|
|
memcpy(context->buf + context->actual - 1, &cr, 1);
|
|
}
|
|
}
|
|
}
|
|
|
|
/****************************************************************************
|
|
*
|
|
* vchiq_dump_platform_instance_state
|
|
*
|
|
***************************************************************************/
|
|
|
|
void
|
|
vchiq_dump_platform_instances(void *dump_context)
|
|
{
|
|
VCHIQ_STATE_T *state = vchiq_get_state();
|
|
char buf[80];
|
|
int len;
|
|
int i;
|
|
|
|
/* There is no list of instances, so instead scan all services,
|
|
marking those that have been dumped. */
|
|
|
|
for (i = 0; i < state->unused_service; i++) {
|
|
VCHIQ_SERVICE_T *service = state->services[i];
|
|
VCHIQ_INSTANCE_T instance;
|
|
|
|
if (service && (service->base.callback == service_callback)) {
|
|
instance = service->instance;
|
|
if (instance)
|
|
instance->mark = 0;
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < state->unused_service; i++) {
|
|
VCHIQ_SERVICE_T *service = state->services[i];
|
|
VCHIQ_INSTANCE_T instance;
|
|
|
|
if (service && (service->base.callback == service_callback)) {
|
|
instance = service->instance;
|
|
if (instance && !instance->mark) {
|
|
len = snprintf(buf, sizeof(buf),
|
|
"Instance %x: pid %d,%s completions "
|
|
"%d/%d",
|
|
(unsigned int)instance, instance->pid,
|
|
instance->connected ? " connected, " :
|
|
"",
|
|
instance->completion_insert -
|
|
instance->completion_remove,
|
|
MAX_COMPLETIONS);
|
|
|
|
vchiq_dump(dump_context, buf, len + 1);
|
|
|
|
instance->mark = 1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/****************************************************************************
|
|
*
|
|
* vchiq_dump_platform_service_state
|
|
*
|
|
***************************************************************************/
|
|
|
|
void
|
|
vchiq_dump_platform_service_state(void *dump_context, VCHIQ_SERVICE_T *service)
|
|
{
|
|
USER_SERVICE_T *user_service = (USER_SERVICE_T *)service->base.userdata;
|
|
char buf[80];
|
|
int len;
|
|
|
|
len = snprintf(buf, sizeof(buf), " instance %x",
|
|
(unsigned int)service->instance);
|
|
|
|
if ((service->base.callback == service_callback) &&
|
|
user_service->is_vchi) {
|
|
len += snprintf(buf + len, sizeof(buf) - len,
|
|
", %d/%d messages",
|
|
user_service->msg_insert - user_service->msg_remove,
|
|
MSG_QUEUE_SIZE);
|
|
|
|
if (user_service->dequeue_pending)
|
|
len += snprintf(buf + len, sizeof(buf) - len,
|
|
" (dequeue pending)");
|
|
}
|
|
|
|
vchiq_dump(dump_context, buf, len + 1);
|
|
}
|
|
|
|
#ifdef notyet
|
|
/****************************************************************************
|
|
*
|
|
* dump_user_mem
|
|
*
|
|
***************************************************************************/
|
|
|
|
static void
|
|
dump_phys_mem(void *virt_addr, uint32_t num_bytes)
|
|
{
|
|
int rc;
|
|
uint8_t *end_virt_addr = virt_addr + num_bytes;
|
|
int num_pages;
|
|
int offset;
|
|
int end_offset;
|
|
int page_idx;
|
|
int prev_idx;
|
|
struct page *page;
|
|
struct page **pages;
|
|
uint8_t *kmapped_virt_ptr;
|
|
|
|
/* Align virtAddr and endVirtAddr to 16 byte boundaries. */
|
|
|
|
virt_addr = (void *)((unsigned long)virt_addr & ~0x0fuL);
|
|
end_virt_addr = (void *)(((unsigned long)end_virt_addr + 15uL) &
|
|
~0x0fuL);
|
|
|
|
offset = (int)(long)virt_addr & (PAGE_SIZE - 1);
|
|
end_offset = (int)(long)end_virt_addr & (PAGE_SIZE - 1);
|
|
|
|
num_pages = (offset + num_bytes + PAGE_SIZE - 1) / PAGE_SIZE;
|
|
|
|
pages = kmalloc(sizeof(struct page *) * num_pages, GFP_KERNEL);
|
|
if (pages == NULL) {
|
|
vchiq_log_error(vchiq_arm_log_level,
|
|
"Unable to allocation memory for %d pages\n",
|
|
num_pages);
|
|
return;
|
|
}
|
|
|
|
down_read(¤t->mm->mmap_sem);
|
|
rc = get_user_pages(current, /* task */
|
|
current->mm, /* mm */
|
|
(unsigned long)virt_addr, /* start */
|
|
num_pages, /* len */
|
|
0, /* write */
|
|
0, /* force */
|
|
pages, /* pages (array of page pointers) */
|
|
NULL); /* vmas */
|
|
up_read(¤t->mm->mmap_sem);
|
|
|
|
prev_idx = -1;
|
|
page = NULL;
|
|
|
|
while (offset < end_offset) {
|
|
|
|
int page_offset = offset % PAGE_SIZE;
|
|
page_idx = offset / PAGE_SIZE;
|
|
|
|
if (page_idx != prev_idx) {
|
|
|
|
if (page != NULL)
|
|
kunmap(page);
|
|
page = pages[page_idx];
|
|
kmapped_virt_ptr = kmap(page);
|
|
|
|
prev_idx = page_idx;
|
|
}
|
|
|
|
if (vchiq_arm_log_level >= VCHIQ_LOG_TRACE)
|
|
vchiq_log_dump_mem("ph",
|
|
(uint32_t)(unsigned long)&kmapped_virt_ptr[
|
|
page_offset],
|
|
&kmapped_virt_ptr[page_offset], 16);
|
|
|
|
offset += 16;
|
|
}
|
|
if (page != NULL)
|
|
kunmap(page);
|
|
|
|
for (page_idx = 0; page_idx < num_pages; page_idx++)
|
|
page_cache_release(pages[page_idx]);
|
|
|
|
kfree(pages);
|
|
}
|
|
|
|
/****************************************************************************
|
|
*
|
|
* vchiq_read
|
|
*
|
|
***************************************************************************/
|
|
|
|
static ssize_t
|
|
vchiq_read(struct file *file, char __user *buf,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
DUMP_CONTEXT_T context;
|
|
context.buf = buf;
|
|
context.actual = 0;
|
|
context.space = count;
|
|
context.offset = *ppos;
|
|
|
|
vchiq_dump_state(&context, &g_state);
|
|
|
|
*ppos += context.actual;
|
|
|
|
return context.actual;
|
|
}
|
|
#endif
|
|
|
|
VCHIQ_STATE_T *
|
|
vchiq_get_state(void)
|
|
{
|
|
|
|
if (g_state.remote == NULL)
|
|
printk(KERN_ERR "%s: g_state.remote == NULL\n", __func__);
|
|
else if (g_state.remote->initialised != 1)
|
|
printk(KERN_NOTICE "%s: g_state.remote->initialised != 1 (%d)\n",
|
|
__func__, g_state.remote->initialised);
|
|
|
|
return ((g_state.remote != NULL) &&
|
|
(g_state.remote->initialised == 1)) ? &g_state : NULL;
|
|
}
|
|
|
|
/*
|
|
* Autosuspend related functionality
|
|
*/
|
|
|
|
int
|
|
vchiq_videocore_wanted(VCHIQ_STATE_T *state)
|
|
{
|
|
VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state);
|
|
if (!arm_state)
|
|
/* autosuspend not supported - always return wanted */
|
|
return 1;
|
|
else if (arm_state->blocked_count)
|
|
return 1;
|
|
else if (!arm_state->videocore_use_count)
|
|
/* usage count zero - check for override unless we're forcing */
|
|
if (arm_state->resume_blocked)
|
|
return 0;
|
|
else
|
|
return vchiq_platform_videocore_wanted(state);
|
|
else
|
|
/* non-zero usage count - videocore still required */
|
|
return 1;
|
|
}
|
|
|
|
static VCHIQ_STATUS_T
|
|
vchiq_keepalive_vchiq_callback(VCHIQ_REASON_T reason,
|
|
VCHIQ_HEADER_T *header,
|
|
VCHIQ_SERVICE_HANDLE_T service_user,
|
|
void *bulk_user)
|
|
{
|
|
vchiq_log_error(vchiq_susp_log_level,
|
|
"%s callback reason %d", __func__, reason);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
vchiq_keepalive_thread_func(void *v)
|
|
{
|
|
VCHIQ_STATE_T *state = (VCHIQ_STATE_T *) v;
|
|
VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state);
|
|
|
|
VCHIQ_STATUS_T status;
|
|
VCHIQ_INSTANCE_T instance;
|
|
VCHIQ_SERVICE_HANDLE_T ka_handle;
|
|
|
|
VCHIQ_SERVICE_PARAMS_T params = {
|
|
.fourcc = VCHIQ_MAKE_FOURCC('K', 'E', 'E', 'P'),
|
|
.callback = vchiq_keepalive_vchiq_callback,
|
|
.version = KEEPALIVE_VER,
|
|
.version_min = KEEPALIVE_VER_MIN
|
|
};
|
|
|
|
status = vchiq_initialise(&instance);
|
|
if (status != VCHIQ_SUCCESS) {
|
|
vchiq_log_error(vchiq_susp_log_level,
|
|
"%s vchiq_initialise failed %d", __func__, status);
|
|
goto exit;
|
|
}
|
|
|
|
status = vchiq_connect(instance);
|
|
if (status != VCHIQ_SUCCESS) {
|
|
vchiq_log_error(vchiq_susp_log_level,
|
|
"%s vchiq_connect failed %d", __func__, status);
|
|
goto shutdown;
|
|
}
|
|
|
|
status = vchiq_add_service(instance, ¶ms, &ka_handle);
|
|
if (status != VCHIQ_SUCCESS) {
|
|
vchiq_log_error(vchiq_susp_log_level,
|
|
"%s vchiq_open_service failed %d", __func__, status);
|
|
goto shutdown;
|
|
}
|
|
|
|
while (1) {
|
|
long rc = 0, uc = 0;
|
|
if (wait_for_completion_interruptible(&arm_state->ka_evt)
|
|
!= 0) {
|
|
vchiq_log_error(vchiq_susp_log_level,
|
|
"%s interrupted", __func__);
|
|
flush_signals(current);
|
|
continue;
|
|
}
|
|
|
|
/* read and clear counters. Do release_count then use_count to
|
|
* prevent getting more releases than uses */
|
|
rc = atomic_xchg(&arm_state->ka_release_count, 0);
|
|
uc = atomic_xchg(&arm_state->ka_use_count, 0);
|
|
|
|
/* Call use/release service the requisite number of times.
|
|
* Process use before release so use counts don't go negative */
|
|
while (uc--) {
|
|
atomic_inc(&arm_state->ka_use_ack_count);
|
|
status = vchiq_use_service(ka_handle);
|
|
if (status != VCHIQ_SUCCESS) {
|
|
vchiq_log_error(vchiq_susp_log_level,
|
|
"%s vchiq_use_service error %d",
|
|
__func__, status);
|
|
}
|
|
}
|
|
while (rc--) {
|
|
status = vchiq_release_service(ka_handle);
|
|
if (status != VCHIQ_SUCCESS) {
|
|
vchiq_log_error(vchiq_susp_log_level,
|
|
"%s vchiq_release_service error %d",
|
|
__func__, status);
|
|
}
|
|
}
|
|
}
|
|
|
|
shutdown:
|
|
vchiq_shutdown(instance);
|
|
exit:
|
|
return 0;
|
|
}
|
|
|
|
VCHIQ_STATUS_T
|
|
vchiq_arm_init_state(VCHIQ_STATE_T *state, VCHIQ_ARM_STATE_T *arm_state)
|
|
{
|
|
VCHIQ_STATUS_T status = VCHIQ_SUCCESS;
|
|
|
|
if (arm_state) {
|
|
rwlock_init(&arm_state->susp_res_lock);
|
|
|
|
init_completion(&arm_state->ka_evt);
|
|
atomic_set(&arm_state->ka_use_count, 0);
|
|
atomic_set(&arm_state->ka_use_ack_count, 0);
|
|
atomic_set(&arm_state->ka_release_count, 0);
|
|
|
|
init_completion(&arm_state->vc_suspend_complete);
|
|
|
|
init_completion(&arm_state->vc_resume_complete);
|
|
/* Initialise to 'done' state. We only want to block on resume
|
|
* completion while videocore is suspended. */
|
|
set_resume_state(arm_state, VC_RESUME_RESUMED);
|
|
|
|
init_completion(&arm_state->resume_blocker);
|
|
/* Initialise to 'done' state. We only want to block on this
|
|
* completion while resume is blocked */
|
|
complete_all(&arm_state->resume_blocker);
|
|
|
|
init_completion(&arm_state->blocked_blocker);
|
|
/* Initialise to 'done' state. We only want to block on this
|
|
* completion while things are waiting on the resume blocker */
|
|
complete_all(&arm_state->blocked_blocker);
|
|
|
|
arm_state->suspend_timer_timeout = SUSPEND_TIMER_TIMEOUT_MS;
|
|
arm_state->suspend_timer_running = 0;
|
|
init_timer(&arm_state->suspend_timer);
|
|
arm_state->suspend_timer.data = (unsigned long)(state);
|
|
arm_state->suspend_timer.function = suspend_timer_callback;
|
|
|
|
arm_state->first_connect = 0;
|
|
|
|
}
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
** Functions to modify the state variables;
|
|
** set_suspend_state
|
|
** set_resume_state
|
|
**
|
|
** There are more state variables than we might like, so ensure they remain in
|
|
** step. Suspend and resume state are maintained separately, since most of
|
|
** these state machines can operate independently. However, there are a few
|
|
** states where state transitions in one state machine cause a reset to the
|
|
** other state machine. In addition, there are some completion events which
|
|
** need to occur on state machine reset and end-state(s), so these are also
|
|
** dealt with in these functions.
|
|
**
|
|
** In all states we set the state variable according to the input, but in some
|
|
** cases we perform additional steps outlined below;
|
|
**
|
|
** VC_SUSPEND_IDLE - Initialise the suspend completion at the same time.
|
|
** The suspend completion is completed after any suspend
|
|
** attempt. When we reset the state machine we also reset
|
|
** the completion. This reset occurs when videocore is
|
|
** resumed, and also if we initiate suspend after a suspend
|
|
** failure.
|
|
**
|
|
** VC_SUSPEND_IN_PROGRESS - This state is considered the point of no return for
|
|
** suspend - ie from this point on we must try to suspend
|
|
** before resuming can occur. We therefore also reset the
|
|
** resume state machine to VC_RESUME_IDLE in this state.
|
|
**
|
|
** VC_SUSPEND_SUSPENDED - Suspend has completed successfully. Also call
|
|
** complete_all on the suspend completion to notify
|
|
** anything waiting for suspend to happen.
|
|
**
|
|
** VC_SUSPEND_REJECTED - Videocore rejected suspend. Videocore will also
|
|
** initiate resume, so no need to alter resume state.
|
|
** We call complete_all on the suspend completion to notify
|
|
** of suspend rejection.
|
|
**
|
|
** VC_SUSPEND_FAILED - We failed to initiate videocore suspend. We notify the
|
|
** suspend completion and reset the resume state machine.
|
|
**
|
|
** VC_RESUME_IDLE - Initialise the resume completion at the same time. The
|
|
** resume completion is in it's 'done' state whenever
|
|
** videcore is running. Therfore, the VC_RESUME_IDLE state
|
|
** implies that videocore is suspended.
|
|
** Hence, any thread which needs to wait until videocore is
|
|
** running can wait on this completion - it will only block
|
|
** if videocore is suspended.
|
|
**
|
|
** VC_RESUME_RESUMED - Resume has completed successfully. Videocore is running.
|
|
** Call complete_all on the resume completion to unblock
|
|
** any threads waiting for resume. Also reset the suspend
|
|
** state machine to it's idle state.
|
|
**
|
|
** VC_RESUME_FAILED - Currently unused - no mechanism to fail resume exists.
|
|
*/
|
|
|
|
void
|
|
set_suspend_state(VCHIQ_ARM_STATE_T *arm_state,
|
|
enum vc_suspend_status new_state)
|
|
{
|
|
/* set the state in all cases */
|
|
arm_state->vc_suspend_state = new_state;
|
|
|
|
/* state specific additional actions */
|
|
switch (new_state) {
|
|
case VC_SUSPEND_FORCE_CANCELED:
|
|
complete_all(&arm_state->vc_suspend_complete);
|
|
break;
|
|
case VC_SUSPEND_REJECTED:
|
|
complete_all(&arm_state->vc_suspend_complete);
|
|
break;
|
|
case VC_SUSPEND_FAILED:
|
|
complete_all(&arm_state->vc_suspend_complete);
|
|
arm_state->vc_resume_state = VC_RESUME_RESUMED;
|
|
complete_all(&arm_state->vc_resume_complete);
|
|
break;
|
|
case VC_SUSPEND_IDLE:
|
|
/* TODO: reinit_completion */
|
|
INIT_COMPLETION(arm_state->vc_suspend_complete);
|
|
break;
|
|
case VC_SUSPEND_REQUESTED:
|
|
break;
|
|
case VC_SUSPEND_IN_PROGRESS:
|
|
set_resume_state(arm_state, VC_RESUME_IDLE);
|
|
break;
|
|
case VC_SUSPEND_SUSPENDED:
|
|
complete_all(&arm_state->vc_suspend_complete);
|
|
break;
|
|
default:
|
|
BUG();
|
|
break;
|
|
}
|
|
}
|
|
|
|
void
|
|
set_resume_state(VCHIQ_ARM_STATE_T *arm_state,
|
|
enum vc_resume_status new_state)
|
|
{
|
|
/* set the state in all cases */
|
|
arm_state->vc_resume_state = new_state;
|
|
|
|
/* state specific additional actions */
|
|
switch (new_state) {
|
|
case VC_RESUME_FAILED:
|
|
break;
|
|
case VC_RESUME_IDLE:
|
|
/* TODO: reinit_completion */
|
|
INIT_COMPLETION(arm_state->vc_resume_complete);
|
|
break;
|
|
case VC_RESUME_REQUESTED:
|
|
break;
|
|
case VC_RESUME_IN_PROGRESS:
|
|
break;
|
|
case VC_RESUME_RESUMED:
|
|
complete_all(&arm_state->vc_resume_complete);
|
|
set_suspend_state(arm_state, VC_SUSPEND_IDLE);
|
|
break;
|
|
default:
|
|
BUG();
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
/* should be called with the write lock held */
|
|
inline void
|
|
start_suspend_timer(VCHIQ_ARM_STATE_T *arm_state)
|
|
{
|
|
del_timer(&arm_state->suspend_timer);
|
|
arm_state->suspend_timer.expires = jiffies +
|
|
msecs_to_jiffies(arm_state->
|
|
suspend_timer_timeout);
|
|
add_timer(&arm_state->suspend_timer);
|
|
arm_state->suspend_timer_running = 1;
|
|
}
|
|
|
|
/* should be called with the write lock held */
|
|
static inline void
|
|
stop_suspend_timer(VCHIQ_ARM_STATE_T *arm_state)
|
|
{
|
|
if (arm_state->suspend_timer_running) {
|
|
del_timer(&arm_state->suspend_timer);
|
|
arm_state->suspend_timer_running = 0;
|
|
}
|
|
}
|
|
|
|
static inline int
|
|
need_resume(VCHIQ_STATE_T *state)
|
|
{
|
|
VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state);
|
|
return (arm_state->vc_suspend_state > VC_SUSPEND_IDLE) &&
|
|
(arm_state->vc_resume_state < VC_RESUME_REQUESTED) &&
|
|
vchiq_videocore_wanted(state);
|
|
}
|
|
|
|
static int
|
|
block_resume(VCHIQ_ARM_STATE_T *arm_state)
|
|
{
|
|
int status = VCHIQ_SUCCESS;
|
|
const unsigned long timeout_val =
|
|
msecs_to_jiffies(FORCE_SUSPEND_TIMEOUT_MS);
|
|
int resume_count = 0;
|
|
|
|
/* Allow any threads which were blocked by the last force suspend to
|
|
* complete if they haven't already. Only give this one shot; if
|
|
* blocked_count is incremented after blocked_blocker is completed
|
|
* (which only happens when blocked_count hits 0) then those threads
|
|
* will have to wait until next time around */
|
|
if (arm_state->blocked_count) {
|
|
/* TODO: reinit_completion */
|
|
INIT_COMPLETION(arm_state->blocked_blocker);
|
|
write_unlock_bh(&arm_state->susp_res_lock);
|
|
vchiq_log_info(vchiq_susp_log_level, "%s wait for previously "
|
|
"blocked clients", __func__);
|
|
if (wait_for_completion_interruptible_timeout(
|
|
&arm_state->blocked_blocker, timeout_val)
|
|
<= 0) {
|
|
vchiq_log_error(vchiq_susp_log_level, "%s wait for "
|
|
"previously blocked clients failed" , __func__);
|
|
status = VCHIQ_ERROR;
|
|
write_lock_bh(&arm_state->susp_res_lock);
|
|
goto out;
|
|
}
|
|
vchiq_log_info(vchiq_susp_log_level, "%s previously blocked "
|
|
"clients resumed", __func__);
|
|
write_lock_bh(&arm_state->susp_res_lock);
|
|
}
|
|
|
|
/* We need to wait for resume to complete if it's in process */
|
|
while (arm_state->vc_resume_state != VC_RESUME_RESUMED &&
|
|
arm_state->vc_resume_state > VC_RESUME_IDLE) {
|
|
if (resume_count > 1) {
|
|
status = VCHIQ_ERROR;
|
|
vchiq_log_error(vchiq_susp_log_level, "%s waited too "
|
|
"many times for resume" , __func__);
|
|
goto out;
|
|
}
|
|
write_unlock_bh(&arm_state->susp_res_lock);
|
|
vchiq_log_info(vchiq_susp_log_level, "%s wait for resume",
|
|
__func__);
|
|
if (wait_for_completion_interruptible_timeout(
|
|
&arm_state->vc_resume_complete, timeout_val)
|
|
<= 0) {
|
|
vchiq_log_error(vchiq_susp_log_level, "%s wait for "
|
|
"resume failed (%s)", __func__,
|
|
resume_state_names[arm_state->vc_resume_state +
|
|
VC_RESUME_NUM_OFFSET]);
|
|
status = VCHIQ_ERROR;
|
|
write_lock_bh(&arm_state->susp_res_lock);
|
|
goto out;
|
|
}
|
|
vchiq_log_info(vchiq_susp_log_level, "%s resumed", __func__);
|
|
write_lock_bh(&arm_state->susp_res_lock);
|
|
resume_count++;
|
|
}
|
|
/* TODO: reinit_completion */
|
|
INIT_COMPLETION(arm_state->resume_blocker);
|
|
arm_state->resume_blocked = 1;
|
|
|
|
out:
|
|
return status;
|
|
}
|
|
|
|
static inline void
|
|
unblock_resume(VCHIQ_ARM_STATE_T *arm_state)
|
|
{
|
|
complete_all(&arm_state->resume_blocker);
|
|
arm_state->resume_blocked = 0;
|
|
}
|
|
|
|
/* Initiate suspend via slot handler. Should be called with the write lock
|
|
* held */
|
|
VCHIQ_STATUS_T
|
|
vchiq_arm_vcsuspend(VCHIQ_STATE_T *state)
|
|
{
|
|
VCHIQ_STATUS_T status = VCHIQ_ERROR;
|
|
VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state);
|
|
|
|
if (!arm_state)
|
|
goto out;
|
|
|
|
vchiq_log_trace(vchiq_susp_log_level, "%s", __func__);
|
|
status = VCHIQ_SUCCESS;
|
|
|
|
|
|
switch (arm_state->vc_suspend_state) {
|
|
case VC_SUSPEND_REQUESTED:
|
|
vchiq_log_info(vchiq_susp_log_level, "%s: suspend already "
|
|
"requested", __func__);
|
|
break;
|
|
case VC_SUSPEND_IN_PROGRESS:
|
|
vchiq_log_info(vchiq_susp_log_level, "%s: suspend already in "
|
|
"progress", __func__);
|
|
break;
|
|
|
|
default:
|
|
/* We don't expect to be in other states, so log but continue
|
|
* anyway */
|
|
vchiq_log_error(vchiq_susp_log_level,
|
|
"%s unexpected suspend state %s", __func__,
|
|
suspend_state_names[arm_state->vc_suspend_state +
|
|
VC_SUSPEND_NUM_OFFSET]);
|
|
/* fall through */
|
|
case VC_SUSPEND_REJECTED:
|
|
case VC_SUSPEND_FAILED:
|
|
/* Ensure any idle state actions have been run */
|
|
set_suspend_state(arm_state, VC_SUSPEND_IDLE);
|
|
/* fall through */
|
|
case VC_SUSPEND_IDLE:
|
|
vchiq_log_info(vchiq_susp_log_level,
|
|
"%s: suspending", __func__);
|
|
set_suspend_state(arm_state, VC_SUSPEND_REQUESTED);
|
|
/* kick the slot handler thread to initiate suspend */
|
|
request_poll(state, NULL, 0);
|
|
break;
|
|
}
|
|
|
|
out:
|
|
vchiq_log_trace(vchiq_susp_log_level, "%s exit %d", __func__, status);
|
|
return status;
|
|
}
|
|
|
|
void
|
|
vchiq_platform_check_suspend(VCHIQ_STATE_T *state)
|
|
{
|
|
VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state);
|
|
int susp = 0;
|
|
|
|
if (!arm_state)
|
|
goto out;
|
|
|
|
vchiq_log_trace(vchiq_susp_log_level, "%s", __func__);
|
|
|
|
write_lock_bh(&arm_state->susp_res_lock);
|
|
if (arm_state->vc_suspend_state == VC_SUSPEND_REQUESTED &&
|
|
arm_state->vc_resume_state == VC_RESUME_RESUMED) {
|
|
set_suspend_state(arm_state, VC_SUSPEND_IN_PROGRESS);
|
|
susp = 1;
|
|
}
|
|
write_unlock_bh(&arm_state->susp_res_lock);
|
|
|
|
if (susp)
|
|
vchiq_platform_suspend(state);
|
|
|
|
out:
|
|
vchiq_log_trace(vchiq_susp_log_level, "%s exit", __func__);
|
|
return;
|
|
}
|
|
|
|
|
|
static void
|
|
output_timeout_error(VCHIQ_STATE_T *state)
|
|
{
|
|
VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state);
|
|
char service_err[50] = "";
|
|
int vc_use_count = arm_state->videocore_use_count;
|
|
int active_services = state->unused_service;
|
|
int i;
|
|
|
|
if (!arm_state->videocore_use_count) {
|
|
snprintf(service_err, 50, " Videocore usecount is 0");
|
|
goto output_msg;
|
|
}
|
|
for (i = 0; i < active_services; i++) {
|
|
VCHIQ_SERVICE_T *service_ptr = state->services[i];
|
|
if (service_ptr && service_ptr->service_use_count &&
|
|
(service_ptr->srvstate != VCHIQ_SRVSTATE_FREE)) {
|
|
snprintf(service_err, 50, " %c%c%c%c(%8x) service has "
|
|
"use count %d%s", VCHIQ_FOURCC_AS_4CHARS(
|
|
service_ptr->base.fourcc),
|
|
service_ptr->client_id,
|
|
service_ptr->service_use_count,
|
|
service_ptr->service_use_count ==
|
|
vc_use_count ? "" : " (+ more)");
|
|
break;
|
|
}
|
|
}
|
|
|
|
output_msg:
|
|
vchiq_log_error(vchiq_susp_log_level,
|
|
"timed out waiting for vc suspend (%d).%s",
|
|
arm_state->autosuspend_override, service_err);
|
|
|
|
}
|
|
|
|
/* Try to get videocore into suspended state, regardless of autosuspend state.
|
|
** We don't actually force suspend, since videocore may get into a bad state
|
|
** if we force suspend at a bad time. Instead, we wait for autosuspend to
|
|
** determine a good point to suspend. If this doesn't happen within 100ms we
|
|
** report failure.
|
|
**
|
|
** Returns VCHIQ_SUCCESS if videocore suspended successfully, VCHIQ_RETRY if
|
|
** videocore failed to suspend in time or VCHIQ_ERROR if interrupted.
|
|
*/
|
|
VCHIQ_STATUS_T
|
|
vchiq_arm_force_suspend(VCHIQ_STATE_T *state)
|
|
{
|
|
VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state);
|
|
VCHIQ_STATUS_T status = VCHIQ_ERROR;
|
|
long rc = 0;
|
|
int repeat = -1;
|
|
|
|
if (!arm_state)
|
|
goto out;
|
|
|
|
vchiq_log_trace(vchiq_susp_log_level, "%s", __func__);
|
|
|
|
write_lock_bh(&arm_state->susp_res_lock);
|
|
|
|
status = block_resume(arm_state);
|
|
if (status != VCHIQ_SUCCESS)
|
|
goto unlock;
|
|
if (arm_state->vc_suspend_state == VC_SUSPEND_SUSPENDED) {
|
|
/* Already suspended - just block resume and exit */
|
|
vchiq_log_info(vchiq_susp_log_level, "%s already suspended",
|
|
__func__);
|
|
status = VCHIQ_SUCCESS;
|
|
goto unlock;
|
|
} else if (arm_state->vc_suspend_state <= VC_SUSPEND_IDLE) {
|
|
/* initiate suspend immediately in the case that we're waiting
|
|
* for the timeout */
|
|
stop_suspend_timer(arm_state);
|
|
if (!vchiq_videocore_wanted(state)) {
|
|
vchiq_log_info(vchiq_susp_log_level, "%s videocore "
|
|
"idle, initiating suspend", __func__);
|
|
status = vchiq_arm_vcsuspend(state);
|
|
} else if (arm_state->autosuspend_override <
|
|
FORCE_SUSPEND_FAIL_MAX) {
|
|
vchiq_log_info(vchiq_susp_log_level, "%s letting "
|
|
"videocore go idle", __func__);
|
|
status = VCHIQ_SUCCESS;
|
|
} else {
|
|
vchiq_log_warning(vchiq_susp_log_level, "%s failed too "
|
|
"many times - attempting suspend", __func__);
|
|
status = vchiq_arm_vcsuspend(state);
|
|
}
|
|
} else {
|
|
vchiq_log_info(vchiq_susp_log_level, "%s videocore suspend "
|
|
"in progress - wait for completion", __func__);
|
|
status = VCHIQ_SUCCESS;
|
|
}
|
|
|
|
/* Wait for suspend to happen due to system idle (not forced..) */
|
|
if (status != VCHIQ_SUCCESS)
|
|
goto unblock_resume;
|
|
|
|
do {
|
|
write_unlock_bh(&arm_state->susp_res_lock);
|
|
|
|
rc = wait_for_completion_interruptible_timeout(
|
|
&arm_state->vc_suspend_complete,
|
|
msecs_to_jiffies(FORCE_SUSPEND_TIMEOUT_MS));
|
|
|
|
write_lock_bh(&arm_state->susp_res_lock);
|
|
if (rc < 0) {
|
|
vchiq_log_warning(vchiq_susp_log_level, "%s "
|
|
"interrupted waiting for suspend", __func__);
|
|
status = VCHIQ_ERROR;
|
|
goto unblock_resume;
|
|
} else if (rc == 0) {
|
|
if (arm_state->vc_suspend_state > VC_SUSPEND_IDLE) {
|
|
/* Repeat timeout once if in progress */
|
|
if (repeat < 0) {
|
|
repeat = 1;
|
|
continue;
|
|
}
|
|
}
|
|
arm_state->autosuspend_override++;
|
|
output_timeout_error(state);
|
|
|
|
status = VCHIQ_RETRY;
|
|
goto unblock_resume;
|
|
}
|
|
} while (0 < (repeat--));
|
|
|
|
/* Check and report state in case we need to abort ARM suspend */
|
|
if (arm_state->vc_suspend_state != VC_SUSPEND_SUSPENDED) {
|
|
status = VCHIQ_RETRY;
|
|
vchiq_log_error(vchiq_susp_log_level,
|
|
"%s videocore suspend failed (state %s)", __func__,
|
|
suspend_state_names[arm_state->vc_suspend_state +
|
|
VC_SUSPEND_NUM_OFFSET]);
|
|
/* Reset the state only if it's still in an error state.
|
|
* Something could have already initiated another suspend. */
|
|
if (arm_state->vc_suspend_state < VC_SUSPEND_IDLE)
|
|
set_suspend_state(arm_state, VC_SUSPEND_IDLE);
|
|
|
|
goto unblock_resume;
|
|
}
|
|
|
|
/* successfully suspended - unlock and exit */
|
|
goto unlock;
|
|
|
|
unblock_resume:
|
|
/* all error states need to unblock resume before exit */
|
|
unblock_resume(arm_state);
|
|
|
|
unlock:
|
|
write_unlock_bh(&arm_state->susp_res_lock);
|
|
|
|
out:
|
|
vchiq_log_trace(vchiq_susp_log_level, "%s exit %d", __func__, status);
|
|
return status;
|
|
}
|
|
|
|
void
|
|
vchiq_check_suspend(VCHIQ_STATE_T *state)
|
|
{
|
|
VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state);
|
|
|
|
if (!arm_state)
|
|
goto out;
|
|
|
|
vchiq_log_trace(vchiq_susp_log_level, "%s", __func__);
|
|
|
|
write_lock_bh(&arm_state->susp_res_lock);
|
|
if (arm_state->vc_suspend_state != VC_SUSPEND_SUSPENDED &&
|
|
arm_state->first_connect &&
|
|
!vchiq_videocore_wanted(state)) {
|
|
vchiq_arm_vcsuspend(state);
|
|
}
|
|
write_unlock_bh(&arm_state->susp_res_lock);
|
|
|
|
out:
|
|
vchiq_log_trace(vchiq_susp_log_level, "%s exit", __func__);
|
|
return;
|
|
}
|
|
|
|
|
|
int
|
|
vchiq_arm_allow_resume(VCHIQ_STATE_T *state)
|
|
{
|
|
VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state);
|
|
int resume = 0;
|
|
int ret = -1;
|
|
|
|
if (!arm_state)
|
|
goto out;
|
|
|
|
vchiq_log_trace(vchiq_susp_log_level, "%s", __func__);
|
|
|
|
write_lock_bh(&arm_state->susp_res_lock);
|
|
unblock_resume(arm_state);
|
|
resume = vchiq_check_resume(state);
|
|
write_unlock_bh(&arm_state->susp_res_lock);
|
|
|
|
if (resume) {
|
|
if (wait_for_completion_interruptible(
|
|
&arm_state->vc_resume_complete) < 0) {
|
|
vchiq_log_error(vchiq_susp_log_level,
|
|
"%s interrupted", __func__);
|
|
/* failed, cannot accurately derive suspend
|
|
* state, so exit early. */
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
read_lock_bh(&arm_state->susp_res_lock);
|
|
if (arm_state->vc_suspend_state == VC_SUSPEND_SUSPENDED) {
|
|
vchiq_log_info(vchiq_susp_log_level,
|
|
"%s: Videocore remains suspended", __func__);
|
|
} else {
|
|
vchiq_log_info(vchiq_susp_log_level,
|
|
"%s: Videocore resumed", __func__);
|
|
ret = 0;
|
|
}
|
|
read_unlock_bh(&arm_state->susp_res_lock);
|
|
out:
|
|
vchiq_log_trace(vchiq_susp_log_level, "%s exit %d", __func__, ret);
|
|
return ret;
|
|
}
|
|
|
|
/* This function should be called with the write lock held */
|
|
int
|
|
vchiq_check_resume(VCHIQ_STATE_T *state)
|
|
{
|
|
VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state);
|
|
int resume = 0;
|
|
|
|
if (!arm_state)
|
|
goto out;
|
|
|
|
vchiq_log_trace(vchiq_susp_log_level, "%s", __func__);
|
|
|
|
if (need_resume(state)) {
|
|
set_resume_state(arm_state, VC_RESUME_REQUESTED);
|
|
request_poll(state, NULL, 0);
|
|
resume = 1;
|
|
}
|
|
|
|
out:
|
|
vchiq_log_trace(vchiq_susp_log_level, "%s exit", __func__);
|
|
return resume;
|
|
}
|
|
|
|
#ifdef notyet
|
|
void
|
|
vchiq_platform_check_resume(VCHIQ_STATE_T *state)
|
|
{
|
|
VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state);
|
|
int res = 0;
|
|
|
|
if (!arm_state)
|
|
goto out;
|
|
|
|
vchiq_log_trace(vchiq_susp_log_level, "%s", __func__);
|
|
|
|
write_lock_bh(&arm_state->susp_res_lock);
|
|
if (arm_state->wake_address == 0) {
|
|
vchiq_log_info(vchiq_susp_log_level,
|
|
"%s: already awake", __func__);
|
|
goto unlock;
|
|
}
|
|
if (arm_state->vc_resume_state == VC_RESUME_IN_PROGRESS) {
|
|
vchiq_log_info(vchiq_susp_log_level,
|
|
"%s: already resuming", __func__);
|
|
goto unlock;
|
|
}
|
|
|
|
if (arm_state->vc_resume_state == VC_RESUME_REQUESTED) {
|
|
set_resume_state(arm_state, VC_RESUME_IN_PROGRESS);
|
|
res = 1;
|
|
} else
|
|
vchiq_log_trace(vchiq_susp_log_level,
|
|
"%s: not resuming (resume state %s)", __func__,
|
|
resume_state_names[arm_state->vc_resume_state +
|
|
VC_RESUME_NUM_OFFSET]);
|
|
|
|
unlock:
|
|
write_unlock_bh(&arm_state->susp_res_lock);
|
|
|
|
if (res)
|
|
vchiq_platform_resume(state);
|
|
|
|
out:
|
|
vchiq_log_trace(vchiq_susp_log_level, "%s exit", __func__);
|
|
return;
|
|
|
|
}
|
|
#endif
|
|
|
|
|
|
|
|
VCHIQ_STATUS_T
|
|
vchiq_use_internal(VCHIQ_STATE_T *state, VCHIQ_SERVICE_T *service,
|
|
enum USE_TYPE_E use_type)
|
|
{
|
|
VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state);
|
|
VCHIQ_STATUS_T ret = VCHIQ_SUCCESS;
|
|
char entity[16];
|
|
int *entity_uc;
|
|
int local_uc, local_entity_uc;
|
|
|
|
if (!arm_state)
|
|
goto out;
|
|
|
|
vchiq_log_trace(vchiq_susp_log_level, "%s", __func__);
|
|
|
|
if (use_type == USE_TYPE_VCHIQ) {
|
|
snprintf(entity, sizeof(entity), "VCHIQ: ");
|
|
entity_uc = &arm_state->peer_use_count;
|
|
} else if (service) {
|
|
snprintf(entity, sizeof(entity), "%c%c%c%c:%8x",
|
|
VCHIQ_FOURCC_AS_4CHARS(service->base.fourcc),
|
|
service->client_id);
|
|
entity_uc = &service->service_use_count;
|
|
} else {
|
|
vchiq_log_error(vchiq_susp_log_level, "%s null service "
|
|
"ptr", __func__);
|
|
ret = VCHIQ_ERROR;
|
|
goto out;
|
|
}
|
|
|
|
write_lock_bh(&arm_state->susp_res_lock);
|
|
while (arm_state->resume_blocked) {
|
|
/* If we call 'use' while force suspend is waiting for suspend,
|
|
* then we're about to block the thread which the force is
|
|
* waiting to complete, so we're bound to just time out. In this
|
|
* case, set the suspend state such that the wait will be
|
|
* canceled, so we can complete as quickly as possible. */
|
|
if (arm_state->resume_blocked && arm_state->vc_suspend_state ==
|
|
VC_SUSPEND_IDLE) {
|
|
set_suspend_state(arm_state, VC_SUSPEND_FORCE_CANCELED);
|
|
break;
|
|
}
|
|
/* If suspend is already in progress then we need to block */
|
|
if (!try_wait_for_completion(&arm_state->resume_blocker)) {
|
|
/* Indicate that there are threads waiting on the resume
|
|
* blocker. These need to be allowed to complete before
|
|
* a _second_ call to force suspend can complete,
|
|
* otherwise low priority threads might never actually
|
|
* continue */
|
|
arm_state->blocked_count++;
|
|
write_unlock_bh(&arm_state->susp_res_lock);
|
|
vchiq_log_info(vchiq_susp_log_level, "%s %s resume "
|
|
"blocked - waiting...", __func__, entity);
|
|
if (wait_for_completion_killable(
|
|
&arm_state->resume_blocker) != 0) {
|
|
vchiq_log_error(vchiq_susp_log_level, "%s %s "
|
|
"wait for resume blocker interrupted",
|
|
__func__, entity);
|
|
ret = VCHIQ_ERROR;
|
|
write_lock_bh(&arm_state->susp_res_lock);
|
|
arm_state->blocked_count--;
|
|
write_unlock_bh(&arm_state->susp_res_lock);
|
|
goto out;
|
|
}
|
|
vchiq_log_info(vchiq_susp_log_level, "%s %s resume "
|
|
"unblocked", __func__, entity);
|
|
write_lock_bh(&arm_state->susp_res_lock);
|
|
if (--arm_state->blocked_count == 0)
|
|
complete_all(&arm_state->blocked_blocker);
|
|
}
|
|
}
|
|
|
|
stop_suspend_timer(arm_state);
|
|
|
|
local_uc = ++arm_state->videocore_use_count;
|
|
local_entity_uc = ++(*entity_uc);
|
|
|
|
/* If there's a pending request which hasn't yet been serviced then
|
|
* just clear it. If we're past VC_SUSPEND_REQUESTED state then
|
|
* vc_resume_complete will block until we either resume or fail to
|
|
* suspend */
|
|
if (arm_state->vc_suspend_state <= VC_SUSPEND_REQUESTED)
|
|
set_suspend_state(arm_state, VC_SUSPEND_IDLE);
|
|
|
|
if ((use_type != USE_TYPE_SERVICE_NO_RESUME) && need_resume(state)) {
|
|
set_resume_state(arm_state, VC_RESUME_REQUESTED);
|
|
vchiq_log_info(vchiq_susp_log_level,
|
|
"%s %s count %d, state count %d",
|
|
__func__, entity, local_entity_uc, local_uc);
|
|
request_poll(state, NULL, 0);
|
|
} else
|
|
vchiq_log_trace(vchiq_susp_log_level,
|
|
"%s %s count %d, state count %d",
|
|
__func__, entity, *entity_uc, local_uc);
|
|
|
|
|
|
write_unlock_bh(&arm_state->susp_res_lock);
|
|
|
|
/* Completion is in a done state when we're not suspended, so this won't
|
|
* block for the non-suspended case. */
|
|
if (!try_wait_for_completion(&arm_state->vc_resume_complete)) {
|
|
vchiq_log_info(vchiq_susp_log_level, "%s %s wait for resume",
|
|
__func__, entity);
|
|
if (wait_for_completion_killable(
|
|
&arm_state->vc_resume_complete) != 0) {
|
|
vchiq_log_error(vchiq_susp_log_level, "%s %s wait for "
|
|
"resume interrupted", __func__, entity);
|
|
ret = VCHIQ_ERROR;
|
|
goto out;
|
|
}
|
|
vchiq_log_info(vchiq_susp_log_level, "%s %s resumed", __func__,
|
|
entity);
|
|
}
|
|
|
|
if (ret == VCHIQ_SUCCESS) {
|
|
VCHIQ_STATUS_T status = VCHIQ_SUCCESS;
|
|
long ack_cnt = atomic_xchg(&arm_state->ka_use_ack_count, 0);
|
|
while (ack_cnt && (status == VCHIQ_SUCCESS)) {
|
|
/* Send the use notify to videocore */
|
|
status = vchiq_send_remote_use_active(state);
|
|
if (status == VCHIQ_SUCCESS)
|
|
ack_cnt--;
|
|
else
|
|
atomic_add(ack_cnt,
|
|
&arm_state->ka_use_ack_count);
|
|
}
|
|
}
|
|
|
|
out:
|
|
vchiq_log_trace(vchiq_susp_log_level, "%s exit %d", __func__, ret);
|
|
return ret;
|
|
}
|
|
|
|
VCHIQ_STATUS_T
|
|
vchiq_release_internal(VCHIQ_STATE_T *state, VCHIQ_SERVICE_T *service)
|
|
{
|
|
VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state);
|
|
VCHIQ_STATUS_T ret = VCHIQ_SUCCESS;
|
|
char entity[16];
|
|
int *entity_uc;
|
|
|
|
if (!arm_state)
|
|
goto out;
|
|
|
|
vchiq_log_trace(vchiq_susp_log_level, "%s", __func__);
|
|
|
|
if (service) {
|
|
snprintf(entity, sizeof(entity), "%c%c%c%c:%8x",
|
|
VCHIQ_FOURCC_AS_4CHARS(service->base.fourcc),
|
|
service->client_id);
|
|
entity_uc = &service->service_use_count;
|
|
} else {
|
|
snprintf(entity, sizeof(entity), "PEER: ");
|
|
entity_uc = &arm_state->peer_use_count;
|
|
}
|
|
|
|
write_lock_bh(&arm_state->susp_res_lock);
|
|
if (!arm_state->videocore_use_count || !(*entity_uc)) {
|
|
/* Don't use BUG_ON - don't allow user thread to crash kernel */
|
|
WARN_ON(!arm_state->videocore_use_count);
|
|
WARN_ON(!(*entity_uc));
|
|
ret = VCHIQ_ERROR;
|
|
goto unlock;
|
|
}
|
|
--arm_state->videocore_use_count;
|
|
--(*entity_uc);
|
|
|
|
if (!vchiq_videocore_wanted(state)) {
|
|
if (vchiq_platform_use_suspend_timer() &&
|
|
!arm_state->resume_blocked) {
|
|
/* Only use the timer if we're not trying to force
|
|
* suspend (=> resume_blocked) */
|
|
start_suspend_timer(arm_state);
|
|
} else {
|
|
vchiq_log_info(vchiq_susp_log_level,
|
|
"%s %s count %d, state count %d - suspending",
|
|
__func__, entity, *entity_uc,
|
|
arm_state->videocore_use_count);
|
|
vchiq_arm_vcsuspend(state);
|
|
}
|
|
} else
|
|
vchiq_log_trace(vchiq_susp_log_level,
|
|
"%s %s count %d, state count %d",
|
|
__func__, entity, *entity_uc,
|
|
arm_state->videocore_use_count);
|
|
|
|
unlock:
|
|
write_unlock_bh(&arm_state->susp_res_lock);
|
|
|
|
out:
|
|
vchiq_log_trace(vchiq_susp_log_level, "%s exit %d", __func__, ret);
|
|
return ret;
|
|
}
|
|
|
|
void
|
|
vchiq_on_remote_use(VCHIQ_STATE_T *state)
|
|
{
|
|
VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state);
|
|
vchiq_log_trace(vchiq_susp_log_level, "%s", __func__);
|
|
atomic_inc(&arm_state->ka_use_count);
|
|
complete(&arm_state->ka_evt);
|
|
}
|
|
|
|
void
|
|
vchiq_on_remote_release(VCHIQ_STATE_T *state)
|
|
{
|
|
VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state);
|
|
vchiq_log_trace(vchiq_susp_log_level, "%s", __func__);
|
|
atomic_inc(&arm_state->ka_release_count);
|
|
complete(&arm_state->ka_evt);
|
|
}
|
|
|
|
VCHIQ_STATUS_T
|
|
vchiq_use_service_internal(VCHIQ_SERVICE_T *service)
|
|
{
|
|
return vchiq_use_internal(service->state, service, USE_TYPE_SERVICE);
|
|
}
|
|
|
|
VCHIQ_STATUS_T
|
|
vchiq_release_service_internal(VCHIQ_SERVICE_T *service)
|
|
{
|
|
return vchiq_release_internal(service->state, service);
|
|
}
|
|
|
|
static void suspend_timer_callback(unsigned long context)
|
|
{
|
|
VCHIQ_STATE_T *state = (VCHIQ_STATE_T *)context;
|
|
VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state);
|
|
if (!arm_state)
|
|
goto out;
|
|
vchiq_log_info(vchiq_susp_log_level,
|
|
"%s - suspend timer expired - check suspend", __func__);
|
|
vchiq_check_suspend(state);
|
|
out:
|
|
return;
|
|
}
|
|
|
|
VCHIQ_STATUS_T
|
|
vchiq_use_service_no_resume(VCHIQ_SERVICE_HANDLE_T handle)
|
|
{
|
|
VCHIQ_STATUS_T ret = VCHIQ_ERROR;
|
|
VCHIQ_SERVICE_T *service = find_service_by_handle(handle);
|
|
if (service) {
|
|
ret = vchiq_use_internal(service->state, service,
|
|
USE_TYPE_SERVICE_NO_RESUME);
|
|
unlock_service(service);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
VCHIQ_STATUS_T
|
|
vchiq_use_service(VCHIQ_SERVICE_HANDLE_T handle)
|
|
{
|
|
VCHIQ_STATUS_T ret = VCHIQ_ERROR;
|
|
VCHIQ_SERVICE_T *service = find_service_by_handle(handle);
|
|
if (service) {
|
|
ret = vchiq_use_internal(service->state, service,
|
|
USE_TYPE_SERVICE);
|
|
unlock_service(service);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
VCHIQ_STATUS_T
|
|
vchiq_release_service(VCHIQ_SERVICE_HANDLE_T handle)
|
|
{
|
|
VCHIQ_STATUS_T ret = VCHIQ_ERROR;
|
|
VCHIQ_SERVICE_T *service = find_service_by_handle(handle);
|
|
if (service) {
|
|
ret = vchiq_release_internal(service->state, service);
|
|
unlock_service(service);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
void
|
|
vchiq_dump_service_use_state(VCHIQ_STATE_T *state)
|
|
{
|
|
VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state);
|
|
int i, j = 0;
|
|
/* Only dump 64 services */
|
|
static const int local_max_services = 64;
|
|
/* If there's more than 64 services, only dump ones with
|
|
* non-zero counts */
|
|
int only_nonzero = 0;
|
|
static const char *nz = "<-- preventing suspend";
|
|
|
|
enum vc_suspend_status vc_suspend_state;
|
|
enum vc_resume_status vc_resume_state;
|
|
int peer_count;
|
|
int vc_use_count;
|
|
int active_services;
|
|
struct service_data_struct {
|
|
int fourcc;
|
|
int clientid;
|
|
int use_count;
|
|
} service_data[local_max_services];
|
|
|
|
if (!arm_state)
|
|
return;
|
|
|
|
read_lock_bh(&arm_state->susp_res_lock);
|
|
vc_suspend_state = arm_state->vc_suspend_state;
|
|
vc_resume_state = arm_state->vc_resume_state;
|
|
peer_count = arm_state->peer_use_count;
|
|
vc_use_count = arm_state->videocore_use_count;
|
|
active_services = state->unused_service;
|
|
if (active_services > local_max_services)
|
|
only_nonzero = 1;
|
|
|
|
for (i = 0; (i < active_services) && (j < local_max_services); i++) {
|
|
VCHIQ_SERVICE_T *service_ptr = state->services[i];
|
|
if (!service_ptr)
|
|
continue;
|
|
|
|
if (only_nonzero && !service_ptr->service_use_count)
|
|
continue;
|
|
|
|
if (service_ptr->srvstate != VCHIQ_SRVSTATE_FREE) {
|
|
service_data[j].fourcc = service_ptr->base.fourcc;
|
|
service_data[j].clientid = service_ptr->client_id;
|
|
service_data[j++].use_count = service_ptr->
|
|
service_use_count;
|
|
}
|
|
}
|
|
|
|
read_unlock_bh(&arm_state->susp_res_lock);
|
|
|
|
vchiq_log_warning(vchiq_susp_log_level,
|
|
"-- Videcore suspend state: %s --",
|
|
suspend_state_names[vc_suspend_state + VC_SUSPEND_NUM_OFFSET]);
|
|
vchiq_log_warning(vchiq_susp_log_level,
|
|
"-- Videcore resume state: %s --",
|
|
resume_state_names[vc_resume_state + VC_RESUME_NUM_OFFSET]);
|
|
|
|
if (only_nonzero)
|
|
vchiq_log_warning(vchiq_susp_log_level, "Too many active "
|
|
"services (%d). Only dumping up to first %d services "
|
|
"with non-zero use-count", active_services,
|
|
local_max_services);
|
|
|
|
for (i = 0; i < j; i++) {
|
|
vchiq_log_warning(vchiq_susp_log_level,
|
|
"----- %c%c%c%c:%d service count %d %s",
|
|
VCHIQ_FOURCC_AS_4CHARS(service_data[i].fourcc),
|
|
service_data[i].clientid,
|
|
service_data[i].use_count,
|
|
service_data[i].use_count ? nz : "");
|
|
}
|
|
vchiq_log_warning(vchiq_susp_log_level,
|
|
"----- VCHIQ use count count %d", peer_count);
|
|
vchiq_log_warning(vchiq_susp_log_level,
|
|
"--- Overall vchiq instance use count %d", vc_use_count);
|
|
|
|
vchiq_dump_platform_use_state(state);
|
|
}
|
|
|
|
VCHIQ_STATUS_T
|
|
vchiq_check_service(VCHIQ_SERVICE_T *service)
|
|
{
|
|
VCHIQ_ARM_STATE_T *arm_state;
|
|
VCHIQ_STATUS_T ret = VCHIQ_ERROR;
|
|
|
|
if (!service || !service->state)
|
|
goto out;
|
|
|
|
vchiq_log_trace(vchiq_susp_log_level, "%s", __func__);
|
|
|
|
arm_state = vchiq_platform_get_arm_state(service->state);
|
|
|
|
read_lock_bh(&arm_state->susp_res_lock);
|
|
if (service->service_use_count)
|
|
ret = VCHIQ_SUCCESS;
|
|
read_unlock_bh(&arm_state->susp_res_lock);
|
|
|
|
if (ret == VCHIQ_ERROR) {
|
|
vchiq_log_error(vchiq_susp_log_level,
|
|
"%s ERROR - %c%c%c%c:%8x service count %d, "
|
|
"state count %d, videocore suspend state %s", __func__,
|
|
VCHIQ_FOURCC_AS_4CHARS(service->base.fourcc),
|
|
service->client_id, service->service_use_count,
|
|
arm_state->videocore_use_count,
|
|
suspend_state_names[arm_state->vc_suspend_state +
|
|
VC_SUSPEND_NUM_OFFSET]);
|
|
vchiq_dump_service_use_state(service->state);
|
|
}
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/* stub functions */
|
|
void vchiq_on_remote_use_active(VCHIQ_STATE_T *state)
|
|
{
|
|
(void)state;
|
|
}
|
|
|
|
void vchiq_platform_conn_state_changed(VCHIQ_STATE_T *state,
|
|
VCHIQ_CONNSTATE_T oldstate, VCHIQ_CONNSTATE_T newstate)
|
|
{
|
|
VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state);
|
|
vchiq_log_info(vchiq_susp_log_level, "%d: %s->%s", state->id,
|
|
get_conn_state_name(oldstate), get_conn_state_name(newstate));
|
|
if (state->conn_state == VCHIQ_CONNSTATE_CONNECTED) {
|
|
write_lock_bh(&arm_state->susp_res_lock);
|
|
if (!arm_state->first_connect) {
|
|
char threadname[10];
|
|
arm_state->first_connect = 1;
|
|
write_unlock_bh(&arm_state->susp_res_lock);
|
|
snprintf(threadname, sizeof(threadname), "VCHIQka-%d",
|
|
state->id);
|
|
arm_state->ka_thread = vchiq_thread_create(
|
|
&vchiq_keepalive_thread_func,
|
|
(void *)state,
|
|
threadname);
|
|
if (arm_state->ka_thread == NULL) {
|
|
vchiq_log_error(vchiq_susp_log_level,
|
|
"vchiq: FATAL: couldn't create thread %s",
|
|
threadname);
|
|
} else {
|
|
wake_up_process(arm_state->ka_thread);
|
|
}
|
|
} else
|
|
write_unlock_bh(&arm_state->susp_res_lock);
|
|
}
|
|
}
|
|
|
|
/****************************************************************************
|
|
*
|
|
* vchiq_init - called when the module is loaded.
|
|
*
|
|
***************************************************************************/
|
|
|
|
int __init vchiq_init(void);
|
|
int __init
|
|
vchiq_init(void)
|
|
{
|
|
int err;
|
|
|
|
#ifdef notyet
|
|
/* create proc entries */
|
|
err = vchiq_proc_init();
|
|
if (err != 0)
|
|
goto failed_proc_init;
|
|
#endif
|
|
|
|
vchiq_cdev = make_dev(&vchiq_cdevsw, 0,
|
|
UID_ROOT, GID_WHEEL, 0600, "vchiq");
|
|
if (!vchiq_cdev) {
|
|
printf("Failed to create /dev/vchiq");
|
|
return (-ENXIO);
|
|
}
|
|
|
|
spin_lock_init(&msg_queue_spinlock);
|
|
|
|
err = vchiq_platform_init(&g_state);
|
|
if (err != 0)
|
|
goto failed_platform_init;
|
|
|
|
vchiq_log_info(vchiq_arm_log_level,
|
|
"vchiq: initialised - version %d (min %d)",
|
|
VCHIQ_VERSION, VCHIQ_VERSION_MIN);
|
|
|
|
return 0;
|
|
|
|
failed_platform_init:
|
|
if (vchiq_cdev) {
|
|
destroy_dev(vchiq_cdev);
|
|
vchiq_cdev = NULL;
|
|
}
|
|
vchiq_log_warning(vchiq_arm_log_level, "could not load vchiq");
|
|
return err;
|
|
}
|
|
|
|
#ifdef notyet
|
|
static int vchiq_instance_get_use_count(VCHIQ_INSTANCE_T instance)
|
|
{
|
|
VCHIQ_SERVICE_T *service;
|
|
int use_count = 0, i;
|
|
i = 0;
|
|
while ((service = next_service_by_instance(instance->state,
|
|
instance, &i)) != NULL) {
|
|
use_count += service->service_use_count;
|
|
unlock_service(service);
|
|
}
|
|
return use_count;
|
|
}
|
|
|
|
/* read the per-process use-count */
|
|
static int proc_read_use_count(char *page, char **start,
|
|
off_t off, int count,
|
|
int *eof, void *data)
|
|
{
|
|
VCHIQ_INSTANCE_T instance = data;
|
|
int len, use_count;
|
|
|
|
use_count = vchiq_instance_get_use_count(instance);
|
|
len = snprintf(page+off, count, "%d\n", use_count);
|
|
|
|
return len;
|
|
}
|
|
|
|
/* add an instance (process) to the proc entries */
|
|
static int vchiq_proc_add_instance(VCHIQ_INSTANCE_T instance)
|
|
{
|
|
char pidstr[32];
|
|
struct proc_dir_entry *top, *use_count;
|
|
struct proc_dir_entry *clients = vchiq_clients_top();
|
|
int pid = instance->pid;
|
|
|
|
snprintf(pidstr, sizeof(pidstr), "%d", pid);
|
|
top = proc_mkdir(pidstr, clients);
|
|
if (!top)
|
|
goto fail_top;
|
|
|
|
use_count = create_proc_read_entry("use_count",
|
|
0444, top,
|
|
proc_read_use_count,
|
|
instance);
|
|
if (!use_count)
|
|
goto fail_use_count;
|
|
|
|
instance->proc_entry = top;
|
|
|
|
return 0;
|
|
|
|
fail_use_count:
|
|
remove_proc_entry(top->name, clients);
|
|
fail_top:
|
|
return -ENOMEM;
|
|
}
|
|
|
|
static void vchiq_proc_remove_instance(VCHIQ_INSTANCE_T instance)
|
|
{
|
|
struct proc_dir_entry *clients = vchiq_clients_top();
|
|
remove_proc_entry("use_count", instance->proc_entry);
|
|
remove_proc_entry(instance->proc_entry->name, clients);
|
|
}
|
|
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
*
|
|
* vchiq_exit - called when the module is unloaded.
|
|
*
|
|
***************************************************************************/
|
|
|
|
void vchiq_exit(void);
|
|
void
|
|
vchiq_exit(void)
|
|
{
|
|
if (vchiq_ehtag == NULL)
|
|
EVENTHANDLER_DEREGISTER(dev_clone, vchiq_ehtag);
|
|
vchiq_ehtag = NULL;
|
|
|
|
vchiq_platform_exit(&g_state);
|
|
if (vchiq_cdev) {
|
|
destroy_dev(vchiq_cdev);
|
|
vchiq_cdev = NULL;
|
|
}
|
|
}
|