/******************************************************************************
*
* Copyright (C) 1999-2012 Broadcom Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
#include <android-base/stringprintf.h>
#include <base/logging.h>
#include "gki_int.h"
#if (GKI_NUM_TOTAL_BUF_POOLS > 16)
#error Number of pools out of range (16 Max)!
#endif
#if (BTU_STACK_LITE_ENABLED == FALSE)
static void gki_add_to_pool_list(uint8_t pool_id);
static void gki_remove_from_pool_list(uint8_t pool_id);
#endif /* BTU_STACK_LITE_ENABLED == FALSE */
using android::base::StringPrintf;
/*******************************************************************************
**
** Function gki_init_free_queue
**
** Description Internal function called at startup to initialize a free
** queue. It is called once for each free queue.
**
** Returns void
**
*******************************************************************************/
static void gki_init_free_queue(uint8_t id, uint16_t size, uint16_t total,
void* p_mem) {
uint16_t i;
uint16_t act_size;
BUFFER_HDR_T* hdr;
BUFFER_HDR_T* hdr1 = nullptr;
uint32_t* magic;
int32_t tempsize = size;
tGKI_COM_CB* p_cb = &gki_cb.com;
/* Ensure an even number of longwords */
tempsize = (int32_t)ALIGN_POOL(size);
act_size = (uint16_t)(tempsize + BUFFER_PADDING_SIZE);
/* Remember pool start and end addresses */
if (p_mem) {
p_cb->pool_start[id] = (uint8_t*)p_mem;
p_cb->pool_end[id] = (uint8_t*)p_mem + (act_size * total);
}
p_cb->pool_size[id] = act_size;
p_cb->freeq[id].size = (uint16_t)tempsize;
p_cb->freeq[id].total = total;
p_cb->freeq[id].cur_cnt = 0;
p_cb->freeq[id].max_cnt = 0;
/* Initialize index table */
if (p_mem) {
hdr = (BUFFER_HDR_T*)p_mem;
p_cb->freeq[id].p_first = hdr;
for (i = 0; i < total; i++) {
hdr->task_id = GKI_INVALID_TASK;
hdr->q_id = id;
hdr->status = BUF_STATUS_FREE;
magic = (uint32_t*)((uint8_t*)hdr + BUFFER_HDR_SIZE + tempsize);
*magic = MAGIC_NO;
hdr1 = hdr;
hdr = (BUFFER_HDR_T*)((uint8_t*)hdr + act_size);
hdr1->p_next = hdr;
}
if (hdr1 != nullptr) hdr = hdr1;
hdr->p_next = nullptr;
p_cb->freeq[id].p_last = hdr;
}
return;
}
static bool gki_alloc_free_queue(uint8_t id) {
FREE_QUEUE_T* Q;
tGKI_COM_CB* p_cb = &gki_cb.com;
Q = &p_cb->freeq[p_cb->pool_list[id]];
if (Q->p_first == nullptr) {
void* p_mem = GKI_os_malloc((Q->size + BUFFER_PADDING_SIZE) * Q->total);
if (p_mem) {
// re-initialize the queue with allocated memory
gki_init_free_queue(id, Q->size, Q->total, p_mem);
return true;
}
GKI_exception(GKI_ERROR_BUF_SIZE_TOOBIG,
"gki_alloc_free_queue: Not enough memory");
}
return false;
}
/*******************************************************************************
**
** Function gki_buffer_init
**
** Description Called once internally by GKI at startup to initialize all
** buffers and free buffer pools.
**
** Returns void
**
*******************************************************************************/
void gki_buffer_init(void) {
uint8_t i, tt, mb;
tGKI_COM_CB* p_cb = &gki_cb.com;
/* Initialize mailboxes */
for (tt = 0; tt < GKI_MAX_TASKS; tt++) {
for (mb = 0; mb < NUM_TASK_MBOX; mb++) {
p_cb->OSTaskQFirst[tt][mb] = nullptr;
p_cb->OSTaskQLast[tt][mb] = nullptr;
}
}
for (tt = 0; tt < GKI_NUM_TOTAL_BUF_POOLS; tt++) {
p_cb->pool_start[tt] = nullptr;
p_cb->pool_end[tt] = nullptr;
p_cb->pool_size[tt] = 0;
p_cb->freeq[tt].p_first = nullptr;
p_cb->freeq[tt].p_last = nullptr;
p_cb->freeq[tt].size = 0;
p_cb->freeq[tt].total = 0;
p_cb->freeq[tt].cur_cnt = 0;
p_cb->freeq[tt].max_cnt = 0;
}
/* Use default from target.h */
p_cb->pool_access_mask = GKI_DEF_BUFPOOL_PERM_MASK;
#if (GKI_NUM_FIXED_BUF_POOLS > 0)
gki_init_free_queue(0, GKI_BUF0_SIZE, GKI_BUF0_MAX, p_cb->bufpool0);
#endif
#if (GKI_NUM_FIXED_BUF_POOLS > 1)
gki_init_free_queue(1, GKI_BUF1_SIZE, GKI_BUF1_MAX, p_cb->bufpool1);
#endif
#if (GKI_NUM_FIXED_BUF_POOLS > 2)
gki_init_free_queue(2, GKI_BUF2_SIZE, GKI_BUF2_MAX, p_cb->bufpool2);
#endif
#if (GKI_NUM_FIXED_BUF_POOLS > 3)
gki_init_free_queue(3, GKI_BUF3_SIZE, GKI_BUF3_MAX, p_cb->bufpool3);
#endif
#if (GKI_NUM_FIXED_BUF_POOLS > 4)
gki_init_free_queue(4, GKI_BUF4_SIZE, GKI_BUF4_MAX, p_cb->bufpool4);
#endif
#if (GKI_NUM_FIXED_BUF_POOLS > 5)
gki_init_free_queue(5, GKI_BUF5_SIZE, GKI_BUF5_MAX, p_cb->bufpool5);
#endif
#if (GKI_NUM_FIXED_BUF_POOLS > 6)
gki_init_free_queue(6, GKI_BUF6_SIZE, GKI_BUF6_MAX, p_cb->bufpool6);
#endif
#if (GKI_NUM_FIXED_BUF_POOLS > 7)
gki_init_free_queue(7, GKI_BUF7_SIZE, GKI_BUF7_MAX, p_cb->bufpool7);
#endif
#if (GKI_NUM_FIXED_BUF_POOLS > 8)
gki_init_free_queue(8, GKI_BUF8_SIZE, GKI_BUF8_MAX, p_cb->bufpool8);
#endif
#if (GKI_NUM_FIXED_BUF_POOLS > 9)
gki_init_free_queue(9, GKI_BUF9_SIZE, GKI_BUF9_MAX, p_cb->bufpool9);
#endif
#if (GKI_NUM_FIXED_BUF_POOLS > 10)
gki_init_free_queue(10, GKI_BUF10_SIZE, GKI_BUF10_MAX, p_cb->bufpool10);
#endif
#if (GKI_NUM_FIXED_BUF_POOLS > 11)
gki_init_free_queue(11, GKI_BUF11_SIZE, GKI_BUF11_MAX, p_cb->bufpool11);
#endif
#if (GKI_NUM_FIXED_BUF_POOLS > 12)
gki_init_free_queue(12, GKI_BUF12_SIZE, GKI_BUF12_MAX, p_cb->bufpool12);
#endif
#if (GKI_NUM_FIXED_BUF_POOLS > 13)
gki_init_free_queue(13, GKI_BUF13_SIZE, GKI_BUF13_MAX, p_cb->bufpool13);
#endif
#if (GKI_NUM_FIXED_BUF_POOLS > 14)
gki_init_free_queue(14, GKI_BUF14_SIZE, GKI_BUF14_MAX, p_cb->bufpool14);
#endif
#if (GKI_NUM_FIXED_BUF_POOLS > 15)
gki_init_free_queue(15, GKI_BUF15_SIZE, GKI_BUF15_MAX, p_cb->bufpool15);
#endif
/* add pools to the pool_list which is arranged in the order of size */
for (i = 0; i < GKI_NUM_FIXED_BUF_POOLS; i++) {
p_cb->pool_list[i] = i;
}
p_cb->curr_total_no_of_pools = GKI_NUM_FIXED_BUF_POOLS;
return;
}
/*******************************************************************************
**
** Function GKI_init_q
**
** Description Called by an application to initialize a buffer queue.
**
** Returns void
**
*******************************************************************************/
void GKI_init_q(BUFFER_Q* p_q) {
p_q->p_first = p_q->p_last = nullptr;
p_q->count = 0;
return;
}
/*******************************************************************************
**
** Function GKI_getbuf
**
** Description Called by an application to get a free buffer which
** is of size greater or equal to the requested size.
**
** Note: This routine only takes buffers from public pools.
** It will not use any buffers from pools
** marked GKI_RESTRICTED_POOL.
**
** Parameters size - (input) number of bytes needed.
**
** Returns A pointer to the buffer, or NULL if none available
**
*******************************************************************************/
void* GKI_getbuf(uint16_t size) {
uint8_t i;
FREE_QUEUE_T* Q;
BUFFER_HDR_T* p_hdr;
tGKI_COM_CB* p_cb = &gki_cb.com;
if (size == 0) {
GKI_exception(GKI_ERROR_BUF_SIZE_ZERO, "getbuf: Size is zero");
return (nullptr);
}
/* Find the first buffer pool that is public that can hold the desired size */
for (i = 0; i < p_cb->curr_total_no_of_pools; i++) {
if (size <= p_cb->freeq[p_cb->pool_list[i]].size) break;
}
if (i == p_cb->curr_total_no_of_pools) {
GKI_exception(GKI_ERROR_BUF_SIZE_TOOBIG, "getbuf: Size is too big");
return (nullptr);
}
/* Make sure the buffers aren't disturbed til finished with allocation */
GKI_disable();
/* search the public buffer pools that are big enough to hold the size
* until a free buffer is found */
for (; i < p_cb->curr_total_no_of_pools; i++) {
/* Only look at PUBLIC buffer pools (bypass RESTRICTED pools) */
if (((uint16_t)1 << p_cb->pool_list[i]) & p_cb->pool_access_mask) continue;
Q = &p_cb->freeq[p_cb->pool_list[i]];
if (Q->cur_cnt < Q->total) {
if (Q->p_first == nullptr && gki_alloc_free_queue(i) != true) {
LOG(ERROR) << StringPrintf("out of buffer");
GKI_enable();
return nullptr;
}
if (Q->p_first == nullptr) {
/* gki_alloc_free_queue() failed to alloc memory */
LOG(ERROR) << StringPrintf("fail alloc free queue");
GKI_enable();
return nullptr;
}
p_hdr = Q->p_first;
Q->p_first = p_hdr->p_next;
if (!Q->p_first) Q->p_last = nullptr;
if (++Q->cur_cnt > Q->max_cnt) Q->max_cnt = Q->cur_cnt;
GKI_enable();
p_hdr->task_id = GKI_get_taskid();
p_hdr->status = BUF_STATUS_UNLINKED;
p_hdr->p_next = nullptr;
p_hdr->Type = 0;
return ((void*)((uint8_t*)p_hdr + BUFFER_HDR_SIZE));
}
}
LOG(ERROR) << StringPrintf("unable to allocate buffer!!!!!");
GKI_enable();
return (nullptr);
}
/*******************************************************************************
**
** Function GKI_getpoolbuf
**
** Description Called by an application to get a free buffer from
** a specific buffer pool.
**
** Note: If there are no more buffers available from the pool,
** the public buffers are searched for an available
** buffer.
**
** Parameters pool_id - (input) pool ID to get a buffer out of.
**
** Returns A pointer to the buffer, or NULL if none available
**
*******************************************************************************/
void* GKI_getpoolbuf(uint8_t pool_id) {
FREE_QUEUE_T* Q;
BUFFER_HDR_T* p_hdr;
tGKI_COM_CB* p_cb = &gki_cb.com;
if (pool_id >= GKI_NUM_TOTAL_BUF_POOLS) return (nullptr);
/* Make sure the buffers aren't disturbed til finished with allocation */
GKI_disable();
Q = &p_cb->freeq[pool_id];
if (Q->cur_cnt < Q->total) {
if (Q->p_first == nullptr && gki_alloc_free_queue(pool_id) != true) return nullptr;
if (Q->p_first == nullptr) {
/* gki_alloc_free_queue() failed to alloc memory */
LOG(ERROR) << StringPrintf("fail alloc free queue");
return nullptr;
}
p_hdr = Q->p_first;
Q->p_first = p_hdr->p_next;
if (!Q->p_first) Q->p_last = nullptr;
if (++Q->cur_cnt > Q->max_cnt) Q->max_cnt = Q->cur_cnt;
GKI_enable();
p_hdr->task_id = GKI_get_taskid();
p_hdr->status = BUF_STATUS_UNLINKED;
p_hdr->p_next = nullptr;
p_hdr->Type = 0;
return ((void*)((uint8_t*)p_hdr + BUFFER_HDR_SIZE));
}
/* If here, no buffers in the specified pool */
GKI_enable();
/* try for free buffers in public pools */
return (GKI_getbuf(p_cb->freeq[pool_id].size));
}
/*******************************************************************************
**
** Function GKI_freebuf
**
** Description Called by an application to return a buffer to the free
** pool.
**
** Parameters p_buf - (input) address of the beginning of a buffer.
**
** Returns void
**
*******************************************************************************/
void GKI_freebuf(void* p_buf) {
FREE_QUEUE_T* Q;
BUFFER_HDR_T* p_hdr;
#if (GKI_ENABLE_BUF_CORRUPTION_CHECK == TRUE)
if (!p_buf || gki_chk_buf_damage(p_buf)) {
GKI_exception(GKI_ERROR_BUF_CORRUPTED, "Free - Buf Corrupted");
return;
}
#endif
p_hdr = (BUFFER_HDR_T*)((uint8_t*)p_buf - BUFFER_HDR_SIZE);
if (p_hdr->status != BUF_STATUS_UNLINKED) {
GKI_exception(GKI_ERROR_FREEBUF_BUF_LINKED, "Freeing Linked Buf");
return;
}
if (p_hdr->q_id >= GKI_NUM_TOTAL_BUF_POOLS) {
GKI_exception(GKI_ERROR_FREEBUF_BAD_QID, "Bad Buf QId");
return;
}
GKI_disable();
/*
** Release the buffer
*/
Q = &gki_cb.com.freeq[p_hdr->q_id];
if (Q->p_last)
Q->p_last->p_next = p_hdr;
else
Q->p_first = p_hdr;
Q->p_last = p_hdr;
p_hdr->p_next = nullptr;
p_hdr->status = BUF_STATUS_FREE;
p_hdr->task_id = GKI_INVALID_TASK;
if (Q->cur_cnt > 0) Q->cur_cnt--;
GKI_enable();
return;
}
/*******************************************************************************
**
** Function GKI_get_buf_size
**
** Description Called by an application to get the size of a buffer.
**
** Parameters p_buf - (input) address of the beginning of a buffer.
**
** Returns the size of the buffer
**
*******************************************************************************/
uint16_t GKI_get_buf_size(void* p_buf) {
BUFFER_HDR_T* p_hdr;
p_hdr = (BUFFER_HDR_T*)((uint8_t*)p_buf - BUFFER_HDR_SIZE);
if ((uintptr_t)p_hdr & 1) return (0);
if (p_hdr->q_id < GKI_NUM_TOTAL_BUF_POOLS) {
return (gki_cb.com.freeq[p_hdr->q_id].size);
}
return (0);
}
/*******************************************************************************
**
** Function gki_chk_buf_damage
**
** Description Called internally by OSS to check for buffer corruption.
**
** Returns TRUE if there is a problem, else FALSE
**
*******************************************************************************/
bool gki_chk_buf_damage(void* p_buf) {
#if (GKI_ENABLE_BUF_CORRUPTION_CHECK == TRUE)
uint32_t* magic;
magic = (uint32_t*)((uint8_t*)p_buf + GKI_get_buf_size(p_buf));
if ((uintptr_t)magic & 1) return true;
if (*magic == MAGIC_NO) return false;
return true;
#else
return false;
#endif
}
/*******************************************************************************
**
** Function GKI_send_msg
**
** Description Called by applications to send a buffer to a task
**
** Returns Nothing
**
*******************************************************************************/
void GKI_send_msg(uint8_t task_id, uint8_t mbox, void* msg) {
BUFFER_HDR_T* p_hdr;
tGKI_COM_CB* p_cb = &gki_cb.com;
/* If task non-existant or not started, drop buffer */
if ((task_id >= GKI_MAX_TASKS) || (mbox >= NUM_TASK_MBOX) ||
(p_cb->OSRdyTbl[task_id] == TASK_DEAD)) {
GKI_exception(GKI_ERROR_SEND_MSG_BAD_DEST, "Sending to unknown dest");
GKI_freebuf(msg);
return;
}
#if (GKI_ENABLE_BUF_CORRUPTION_CHECK == TRUE)
if (gki_chk_buf_damage(msg)) {
GKI_exception(GKI_ERROR_BUF_CORRUPTED, "Send - Buffer corrupted");
return;
}
#endif
p_hdr = (BUFFER_HDR_T*)((uint8_t*)msg - BUFFER_HDR_SIZE);
if (p_hdr->status != BUF_STATUS_UNLINKED) {
GKI_exception(GKI_ERROR_SEND_MSG_BUF_LINKED, "Send - buffer linked");
return;
}
GKI_disable();
if (p_cb->OSTaskQFirst[task_id][mbox])
p_cb->OSTaskQLast[task_id][mbox]->p_next = p_hdr;
else
p_cb->OSTaskQFirst[task_id][mbox] = p_hdr;
p_cb->OSTaskQLast[task_id][mbox] = p_hdr;
p_hdr->p_next = nullptr;
p_hdr->status = BUF_STATUS_QUEUED;
p_hdr->task_id = task_id;
GKI_enable();
GKI_send_event(task_id, (uint16_t)EVENT_MASK(mbox));
return;
}
/*******************************************************************************
**
** Function GKI_read_mbox
**
** Description Called by applications to read a buffer from one of
** the task mailboxes. A task can only read its own mailbox.
**
** Parameters: mbox - (input) mailbox ID to read (0, 1, 2, or 3)
**
** Returns NULL if the mailbox was empty, else the address of a buffer
**
*******************************************************************************/
void* GKI_read_mbox(uint8_t mbox) {
uint8_t task_id = GKI_get_taskid();
void* p_buf = nullptr;
BUFFER_HDR_T* p_hdr;
if ((task_id >= GKI_MAX_TASKS) || (mbox >= NUM_TASK_MBOX)) return (nullptr);
GKI_disable();
if (gki_cb.com.OSTaskQFirst[task_id][mbox]) {
p_hdr = gki_cb.com.OSTaskQFirst[task_id][mbox];
gki_cb.com.OSTaskQFirst[task_id][mbox] = p_hdr->p_next;
p_hdr->p_next = nullptr;
p_hdr->status = BUF_STATUS_UNLINKED;
p_buf = (uint8_t*)p_hdr + BUFFER_HDR_SIZE;
}
GKI_enable();
return (p_buf);
}
/*******************************************************************************
**
** Function GKI_enqueue
**
** Description Enqueue a buffer at the tail of the queue
**
** Parameters: p_q - (input) pointer to a queue.
** p_buf - (input) address of the buffer to enqueue
**
** Returns void
**
*******************************************************************************/
void GKI_enqueue(BUFFER_Q* p_q, void* p_buf) {
BUFFER_HDR_T* p_hdr;
#if (GKI_ENABLE_BUF_CORRUPTION_CHECK == TRUE)
if (gki_chk_buf_damage(p_buf)) {
GKI_exception(GKI_ERROR_BUF_CORRUPTED, "Enqueue - Buffer corrupted");
return;
}
#endif
p_hdr = (BUFFER_HDR_T*)((uint8_t*)p_buf - BUFFER_HDR_SIZE);
if (p_hdr->status != BUF_STATUS_UNLINKED) {
GKI_exception(GKI_ERROR_ENQUEUE_BUF_LINKED, "Eneueue - buf already linked");
return;
}
GKI_disable();
/* Since the queue is exposed (C vs C++), keep the pointers in exposed format
*/
if (p_q->p_first) {
BUFFER_HDR_T* p_last_hdr =
(BUFFER_HDR_T*)((uint8_t*)p_q->p_last - BUFFER_HDR_SIZE);
p_last_hdr->p_next = p_hdr;
} else
p_q->p_first = p_buf;
p_q->p_last = p_buf;
p_q->count++;
p_hdr->p_next = nullptr;
p_hdr->status = BUF_STATUS_QUEUED;
GKI_enable();
return;
}
/*******************************************************************************
**
** Function GKI_enqueue_head
**
** Description Enqueue a buffer at the head of the queue
**
** Parameters: p_q - (input) pointer to a queue.
** p_buf - (input) address of the buffer to enqueue
**
** Returns void
**
*******************************************************************************/
void GKI_enqueue_head(BUFFER_Q* p_q, void* p_buf) {
BUFFER_HDR_T* p_hdr;
#if (GKI_ENABLE_BUF_CORRUPTION_CHECK == TRUE)
if (gki_chk_buf_damage(p_buf)) {
GKI_exception(GKI_ERROR_BUF_CORRUPTED, "Enqueue - Buffer corrupted");
return;
}
#endif
p_hdr = (BUFFER_HDR_T*)((uint8_t*)p_buf - BUFFER_HDR_SIZE);
if (p_hdr->status != BUF_STATUS_UNLINKED) {
GKI_exception(GKI_ERROR_ENQUEUE_BUF_LINKED,
"Eneueue head - buf already linked");
return;
}
GKI_disable();
if (p_q->p_first) {
p_hdr->p_next = (BUFFER_HDR_T*)((uint8_t*)p_q->p_first - BUFFER_HDR_SIZE);
p_q->p_first = p_buf;
} else {
p_q->p_first = p_buf;
p_q->p_last = p_buf;
p_hdr->p_next = nullptr;
}
p_q->count++;
p_hdr->status = BUF_STATUS_QUEUED;
GKI_enable();
return;
}
/*******************************************************************************
**
** Function GKI_dequeue
**
** Description Dequeues a buffer from the head of a queue
**
** Parameters: p_q - (input) pointer to a queue.
**
** Returns NULL if queue is empty, else buffer
**
*******************************************************************************/
void* GKI_dequeue(BUFFER_Q* p_q) {
BUFFER_HDR_T* p_hdr;
GKI_disable();
if (!p_q || !p_q->count) {
GKI_enable();
return (nullptr);
}
p_hdr = (BUFFER_HDR_T*)((uint8_t*)p_q->p_first - BUFFER_HDR_SIZE);
/* Keep buffers such that GKI header is invisible
*/
if (p_hdr->p_next)
p_q->p_first = ((uint8_t*)p_hdr->p_next + BUFFER_HDR_SIZE);
else {
p_q->p_first = nullptr;
p_q->p_last = nullptr;
}
p_q->count--;
p_hdr->p_next = nullptr;
p_hdr->status = BUF_STATUS_UNLINKED;
GKI_enable();
return ((uint8_t*)p_hdr + BUFFER_HDR_SIZE);
}
/*******************************************************************************
**
** Function GKI_remove_from_queue
**
** Description Dequeue a buffer from the middle of the queue
**
** Parameters: p_q - (input) pointer to a queue.
** p_buf - (input) address of the buffer to enqueue
**
** Returns NULL if queue is empty, else buffer
**
*******************************************************************************/
void* GKI_remove_from_queue(BUFFER_Q* p_q, void* p_buf) {
BUFFER_HDR_T* p_prev;
BUFFER_HDR_T* p_buf_hdr;
GKI_disable();
if (p_buf == p_q->p_first) {
GKI_enable();
return (GKI_dequeue(p_q));
}
p_buf_hdr = (BUFFER_HDR_T*)((uint8_t*)p_buf - BUFFER_HDR_SIZE);
p_prev = (BUFFER_HDR_T*)((uint8_t*)p_q->p_first - BUFFER_HDR_SIZE);
for (; p_prev; p_prev = p_prev->p_next) {
/* If the previous points to this one, move the pointers around */
if (p_prev->p_next == p_buf_hdr) {
p_prev->p_next = p_buf_hdr->p_next;
/* If we are removing the last guy in the queue, update p_last */
if (p_buf == p_q->p_last) p_q->p_last = p_prev + 1;
/* One less in the queue */
p_q->count--;
/* The buffer is now unlinked */
p_buf_hdr->p_next = nullptr;
p_buf_hdr->status = BUF_STATUS_UNLINKED;
GKI_enable();
return (p_buf);
}
}
GKI_enable();
return (nullptr);
}
/*******************************************************************************
**
** Function GKI_getfirst
**
** Description Return a pointer to the first buffer in a queue
**
** Parameters: p_q - (input) pointer to a queue.
**
** Returns NULL if queue is empty, else buffer address
**
*******************************************************************************/
void* GKI_getfirst(BUFFER_Q* p_q) { return (p_q->p_first); }
/*******************************************************************************
**
** Function GKI_getlast
**
** Description Return a pointer to the last buffer in a queue
**
** Parameters: p_q - (input) pointer to a queue.
**
** Returns NULL if queue is empty, else buffer address
**
*******************************************************************************/
void* GKI_getlast(BUFFER_Q* p_q) { return (p_q->p_last); }
/*******************************************************************************
**
** Function GKI_getnext
**
** Description Return a pointer to the next buffer in a queue
**
** Parameters: p_buf - (input) pointer to the buffer to find the next one
** from.
**
** Returns NULL if no more buffers in the queue, else next buffer
** address
**
*******************************************************************************/
void* GKI_getnext(void* p_buf) {
BUFFER_HDR_T* p_hdr;
p_hdr = (BUFFER_HDR_T*)((uint8_t*)p_buf - BUFFER_HDR_SIZE);
if (p_hdr->p_next)
return ((uint8_t*)p_hdr->p_next + BUFFER_HDR_SIZE);
else
return (nullptr);
}
/*******************************************************************************
**
** Function GKI_queue_is_empty
**
** Description Check the status of a queue.
**
** Parameters: p_q - (input) pointer to a queue.
**
** Returns TRUE if queue is empty, else FALSE
**
*******************************************************************************/
bool GKI_queue_is_empty(BUFFER_Q* p_q) { return ((bool)(p_q->count == 0)); }
/*******************************************************************************
**
** Function GKI_find_buf_start
**
** Description This function is called with an address inside a buffer,
** and returns the start address ofthe buffer.
**
** The buffer should be one allocated from one of GKI's pools.
**
** Parameters: p_user_area - (input) address of anywhere in a GKI buffer.
**
** Returns void * - Address of the beginning of the specified buffer if
** successful, otherwise NULL if unsuccessful
**
*******************************************************************************/
void* GKI_find_buf_start(void* p_user_area) {
uint16_t xx, size;
uint32_t yy;
tGKI_COM_CB* p_cb = &gki_cb.com;
uint8_t* p_ua = (uint8_t*)p_user_area;
for (xx = 0; xx < GKI_NUM_TOTAL_BUF_POOLS; xx++) {
if ((p_ua > p_cb->pool_start[xx]) && (p_ua < p_cb->pool_end[xx])) {
yy = (uint32_t)(p_ua - p_cb->pool_start[xx]);
size = p_cb->pool_size[xx];
yy = (yy / size) * size;
return ((void*)(p_cb->pool_start[xx] + yy + sizeof(BUFFER_HDR_T)));
}
}
/* If here, invalid address - not in one of our buffers */
GKI_exception(GKI_ERROR_BUF_SIZE_ZERO, "GKI_get_buf_start:: bad addr");
return (nullptr);
}
/********************************************************
* The following functions are not needed for light stack
*********************************************************/
#ifndef BTU_STACK_LITE_ENABLED
#define BTU_STACK_LITE_ENABLED FALSE
#endif
#if (BTU_STACK_LITE_ENABLED == FALSE)
/*******************************************************************************
**
** Function GKI_set_pool_permission
**
** Description This function is called to set or change the permissions for
** the specified pool ID.
**
** Parameters pool_id - (input) pool ID to be set or changed
** permission - (input) GKI_PUBLIC_POOL or GKI_RESTRICTED_POOL
**
** Returns GKI_SUCCESS if successful
** GKI_INVALID_POOL if unsuccessful
**
*******************************************************************************/
uint8_t GKI_set_pool_permission(uint8_t pool_id, uint8_t permission) {
tGKI_COM_CB* p_cb = &gki_cb.com;
if (pool_id < GKI_NUM_TOTAL_BUF_POOLS) {
if (permission == GKI_RESTRICTED_POOL)
p_cb->pool_access_mask =
(uint16_t)(p_cb->pool_access_mask | (1 << pool_id));
else /* mark the pool as public */
p_cb->pool_access_mask =
(uint16_t)(p_cb->pool_access_mask & ~(1 << pool_id));
return (GKI_SUCCESS);
} else
return (GKI_INVALID_POOL);
}
/*******************************************************************************
**
** Function gki_add_to_pool_list
**
** Description Adds pool to the pool list which is arranged in the
** order of size
**
** Returns void
**
*******************************************************************************/
static void gki_add_to_pool_list(uint8_t pool_id) {
int32_t i, j;
tGKI_COM_CB* p_cb = &gki_cb.com;
/* Find the position where the specified pool should be inserted into the list
*/
for (i = 0; i < p_cb->curr_total_no_of_pools; i++) {
if (p_cb->freeq[pool_id].size <= p_cb->freeq[p_cb->pool_list[i]].size)
break;
}
/* Insert the new buffer pool ID into the list of pools */
for (j = p_cb->curr_total_no_of_pools; j > i; j--) {
p_cb->pool_list[j] = p_cb->pool_list[j - 1];
}
p_cb->pool_list[i] = pool_id;
return;
}
/*******************************************************************************
**
** Function gki_remove_from_pool_list
**
** Description Removes pool from the pool list. Called when a pool is
** deleted
**
** Returns void
**
*******************************************************************************/
static void gki_remove_from_pool_list(uint8_t pool_id) {
tGKI_COM_CB* p_cb = &gki_cb.com;
uint8_t i;
for (i = 0; i < p_cb->curr_total_no_of_pools; i++) {
if (pool_id == p_cb->pool_list[i]) break;
}
while (i < (p_cb->curr_total_no_of_pools - 1)) {
p_cb->pool_list[i] = p_cb->pool_list[i + 1];
i++;
}
return;
}
/*******************************************************************************
**
** Function GKI_poolcount
**
** Description Called by an application to get the total number of buffers
** in the specified buffer pool.
**
** Parameters pool_id - (input) pool ID to get the free count of.
**
** Returns the total number of buffers in the pool
**
*******************************************************************************/
uint16_t GKI_poolcount(uint8_t pool_id) {
if (pool_id >= GKI_NUM_TOTAL_BUF_POOLS) return (0);
return (gki_cb.com.freeq[pool_id].total);
}
/*******************************************************************************
**
** Function GKI_poolfreecount
**
** Description Called by an application to get the number of free buffers
** in the specified buffer pool.
**
** Parameters pool_id - (input) pool ID to get the free count of.
**
** Returns the number of free buffers in the pool
**
*******************************************************************************/
uint16_t GKI_poolfreecount(uint8_t pool_id) {
FREE_QUEUE_T* Q;
if (pool_id >= GKI_NUM_TOTAL_BUF_POOLS) return (0);
Q = &gki_cb.com.freeq[pool_id];
return ((uint16_t)(Q->total - Q->cur_cnt));
}
/*******************************************************************************
**
** Function GKI_change_buf_owner
**
** Description Called to change the task ownership of a buffer.
**
** Parameters: p_buf - (input) pointer to the buffer
** task_id - (input) task id to change ownership to
**
** Returns void
**
*******************************************************************************/
void GKI_change_buf_owner(void* p_buf, uint8_t task_id) {
BUFFER_HDR_T* p_hdr = (BUFFER_HDR_T*)((uint8_t*)p_buf - BUFFER_HDR_SIZE);
p_hdr->task_id = task_id;
return;
}
#if (GKI_SEND_MSG_FROM_ISR == TRUE)
/*******************************************************************************
**
** Function GKI_isend_msg
**
** Description Called from interrupt context to send a buffer to a task
**
** Returns Nothing
**
*******************************************************************************/
void GKI_isend_msg(uint8_t task_id, uint8_t mbox, void* msg) {
BUFFER_HDR_T* p_hdr;
tGKI_COM_CB* p_cb = &gki_cb.com;
/* If task non-existant or not started, drop buffer */
if ((task_id >= GKI_MAX_TASKS) || (mbox >= NUM_TASK_MBOX) ||
(p_cb->OSRdyTbl[task_id] == TASK_DEAD)) {
GKI_exception(GKI_ERROR_SEND_MSG_BAD_DEST, "Sending to unknown dest");
GKI_freebuf(msg);
return;
}
#if (GKI_ENABLE_BUF_CORRUPTION_CHECK == TRUE)
if (gki_chk_buf_damage(msg)) {
GKI_exception(GKI_ERROR_BUF_CORRUPTED, "Send - Buffer corrupted");
return;
}
#endif
#if (GKI_ENABLE_OWNER_CHECK == TRUE)
if (gki_chk_buf_owner(msg)) {
GKI_exception(GKI_ERROR_NOT_BUF_OWNER, "Send by non-owner");
return;
}
#endif
p_hdr = (BUFFER_HDR_T*)((uint8_t*)msg - BUFFER_HDR_SIZE);
if (p_hdr->status != BUF_STATUS_UNLINKED) {
GKI_exception(GKI_ERROR_SEND_MSG_BUF_LINKED, "Send - buffer linked");
return;
}
if (p_cb->OSTaskQFirst[task_id][mbox])
p_cb->OSTaskQLast[task_id][mbox]->p_next = p_hdr;
else
p_cb->OSTaskQFirst[task_id][mbox] = p_hdr;
p_cb->OSTaskQLast[task_id][mbox] = p_hdr;
p_hdr->p_next = NULL;
p_hdr->status = BUF_STATUS_QUEUED;
p_hdr->task_id = task_id;
GKI_isend_event(task_id, (uint16_t)EVENT_MASK(mbox));
return;
}
#endif
/*******************************************************************************
**
** Function GKI_create_pool
**
** Description Called by applications to create a buffer pool.
**
** Parameters: size - (input) length (in bytes) of each buffer in the pool
** count - (input) number of buffers to allocate for the pool
** permission - (input) restricted or public access?
** (GKI_PUBLIC_POOL or GKI_RESTRICTED_POOL)
** p_mem_pool - (input) pointer to an OS memory pool, NULL if
** not provided
**
** Returns the buffer pool ID, which should be used in calls to
** GKI_getpoolbuf(). If a pool could not be created, this
** function returns 0xff.
**
*******************************************************************************/
uint8_t GKI_create_pool(uint16_t size, uint16_t count, uint8_t permission,
void* p_mem_pool) {
uint8_t xx;
uint32_t mem_needed;
int32_t tempsize = size;
tGKI_COM_CB* p_cb = &gki_cb.com;
/* First make sure the size of each pool has a valid size with room for the
* header info */
if (size > MAX_USER_BUF_SIZE) return (GKI_INVALID_POOL);
/* First, look for an unused pool */
for (xx = 0; xx < GKI_NUM_TOTAL_BUF_POOLS; xx++) {
if (!p_cb->pool_start[xx]) break;
}
if (xx == GKI_NUM_TOTAL_BUF_POOLS) return (GKI_INVALID_POOL);
/* Ensure an even number of longwords */
tempsize = (int32_t)ALIGN_POOL(size);
mem_needed = (tempsize + BUFFER_PADDING_SIZE) * count;
if (!p_mem_pool) p_mem_pool = GKI_os_malloc(mem_needed);
if (p_mem_pool) {
/* Initialize the new pool */
gki_init_free_queue(xx, size, count, p_mem_pool);
gki_add_to_pool_list(xx);
(void)GKI_set_pool_permission(xx, permission);
p_cb->curr_total_no_of_pools++;
return (xx);
} else
return (GKI_INVALID_POOL);
}
/*******************************************************************************
**
** Function GKI_delete_pool
**
** Description Called by applications to delete a buffer pool. The
** function calls the operating specific function to free the
** actual memory. An exception is generated if an error is
** detected.
**
** Parameters: pool_id - (input) Id of the poll being deleted.
**
** Returns void
**
*******************************************************************************/
void GKI_delete_pool(uint8_t pool_id) {
FREE_QUEUE_T* Q;
tGKI_COM_CB* p_cb = &gki_cb.com;
if ((pool_id >= GKI_NUM_TOTAL_BUF_POOLS) || (!p_cb->pool_start[pool_id]))
return;
GKI_disable();
Q = &p_cb->freeq[pool_id];
if (!Q->cur_cnt) {
Q->size = 0;
Q->total = 0;
Q->cur_cnt = 0;
Q->max_cnt = 0;
Q->p_first = nullptr;
Q->p_last = nullptr;
GKI_os_free(p_cb->pool_start[pool_id]);
p_cb->pool_start[pool_id] = nullptr;
p_cb->pool_end[pool_id] = nullptr;
p_cb->pool_size[pool_id] = 0;
gki_remove_from_pool_list(pool_id);
p_cb->curr_total_no_of_pools--;
} else
GKI_exception(GKI_ERROR_DELETE_POOL_BAD_QID, "Deleting bad pool");
GKI_enable();
return;
}
#endif /* BTU_STACK_LITE_ENABLED == FALSE */
/*******************************************************************************
**
** Function GKI_get_pool_bufsize
**
** Description Called by an application to get the size of buffers in a
** pool
**
** Parameters Pool ID.
**
** Returns the size of buffers in the pool
**
*******************************************************************************/
uint16_t GKI_get_pool_bufsize(uint8_t pool_id) {
if (pool_id < GKI_NUM_TOTAL_BUF_POOLS)
return (gki_cb.com.freeq[pool_id].size);
return (0);
}
/*******************************************************************************
**
** Function GKI_poolutilization
**
** Description Called by an application to get the buffer utilization
** in the specified buffer pool.
**
** Parameters pool_id - (input) pool ID to get the free count of.
**
** Returns % of buffers used from 0 to 100
**
*******************************************************************************/
uint16_t GKI_poolutilization(uint8_t pool_id) {
FREE_QUEUE_T* Q;
if (pool_id >= GKI_NUM_TOTAL_BUF_POOLS) return (100);
Q = &gki_cb.com.freeq[pool_id];
if (Q->total == 0) return (100);
return ((Q->cur_cnt * 100) / Q->total);
}