diff options
Diffstat (limited to 'drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/queue/src/queue.c')
-rw-r--r-- | drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/queue/src/queue.c | 412 |
1 files changed, 412 insertions, 0 deletions
diff --git a/drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/queue/src/queue.c b/drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/queue/src/queue.c new file mode 100644 index 000000000000..606376fdf0ba --- /dev/null +++ b/drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/queue/src/queue.c @@ -0,0 +1,412 @@ +/* + * Support for Intel Camera Imaging ISP subsystem. + * Copyright (c) 2015, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + */ + +#include "ia_css_queue.h" +#include <math_support.h> +#include <ia_css_circbuf.h> +#include <ia_css_circbuf_desc.h> +#include "queue_access.h" + +/***************************************************************************** + * Queue Public APIs + *****************************************************************************/ +int ia_css_queue_local_init( + ia_css_queue_t *qhandle, + ia_css_queue_local_t *desc) +{ + if (NULL == qhandle || NULL == desc + || NULL == desc->cb_elems || NULL == desc->cb_desc) { + /* Invalid parameters, return error*/ + return EINVAL; + } + + /* Mark the queue as Local */ + qhandle->type = IA_CSS_QUEUE_TYPE_LOCAL; + + /* Create a local circular buffer queue*/ + ia_css_circbuf_create(&qhandle->desc.cb_local, + desc->cb_elems, + desc->cb_desc); + + return 0; +} + +int ia_css_queue_remote_init( + ia_css_queue_t *qhandle, + ia_css_queue_remote_t *desc) +{ + if (NULL == qhandle || NULL == desc) { + /* Invalid parameters, return error*/ + return EINVAL; + } + + /* Mark the queue as remote*/ + qhandle->type = IA_CSS_QUEUE_TYPE_REMOTE; + + /* Copy over the local queue descriptor*/ + qhandle->location = desc->location; + qhandle->proc_id = desc->proc_id; + qhandle->desc.remote.cb_desc_addr = desc->cb_desc_addr; + qhandle->desc.remote.cb_elems_addr = desc->cb_elems_addr; + + /* If queue is remote, we let the local processor + * do its init, before using it. This is just to get us + * started, we can remove this restriction as we go ahead + */ + + return 0; +} + +int ia_css_queue_uninit( + ia_css_queue_t *qhandle) +{ + if (!qhandle) + return EINVAL; + + /* Load the required queue object */ + if (qhandle->type == IA_CSS_QUEUE_TYPE_LOCAL) { + /* Local queues are created. Destroy it*/ + ia_css_circbuf_destroy(&qhandle->desc.cb_local); + } + + return 0; +} + +int ia_css_queue_enqueue( + ia_css_queue_t *qhandle, + uint32_t item) +{ + int error = 0; + if (NULL == qhandle) + return EINVAL; + + /* 1. Load the required queue object */ + if (qhandle->type == IA_CSS_QUEUE_TYPE_LOCAL) { + /* Directly de-ref the object and + * operate on the queue + */ + if (ia_css_circbuf_is_full(&qhandle->desc.cb_local)) { + /* Cannot push the element. Return*/ + return ENOBUFS; + } + + /* Push the element*/ + ia_css_circbuf_push(&qhandle->desc.cb_local, item); + } else if (qhandle->type == IA_CSS_QUEUE_TYPE_REMOTE) { + ia_css_circbuf_desc_t cb_desc; + ia_css_circbuf_elem_t cb_elem; + uint32_t ignore_desc_flags = QUEUE_IGNORE_STEP_FLAG; + + /* a. Load the queue cb_desc from remote */ + QUEUE_CB_DESC_INIT(&cb_desc); + error = ia_css_queue_load(qhandle, &cb_desc, ignore_desc_flags); + if (error != 0) + return error; + + /* b. Operate on the queue */ + if (ia_css_circbuf_desc_is_full(&cb_desc)) + return ENOBUFS; + + cb_elem.val = item; + + error = ia_css_queue_item_store(qhandle, cb_desc.end, &cb_elem); + if (error != 0) + return error; + + cb_desc.end = (cb_desc.end + 1) % cb_desc.size; + + /* c. Store the queue object */ + /* Set only fields requiring update with + * valid value. Avoids uncessary calls + * to load/store functions + */ + ignore_desc_flags = QUEUE_IGNORE_SIZE_START_STEP_FLAGS; + + error = ia_css_queue_store(qhandle, &cb_desc, ignore_desc_flags); + if (error != 0) + return error; + } + + return 0; +} + +int ia_css_queue_dequeue( + ia_css_queue_t *qhandle, + uint32_t *item) +{ + int error = 0; + if (qhandle == NULL || NULL == item) + return EINVAL; + + /* 1. Load the required queue object */ + if (qhandle->type == IA_CSS_QUEUE_TYPE_LOCAL) { + /* Directly de-ref the object and + * operate on the queue + */ + if (ia_css_circbuf_is_empty(&qhandle->desc.cb_local)) { + /* Nothing to pop. Return empty queue*/ + return ENODATA; + } + + *item = ia_css_circbuf_pop(&qhandle->desc.cb_local); + } else if (qhandle->type == IA_CSS_QUEUE_TYPE_REMOTE) { + /* a. Load the queue from remote */ + ia_css_circbuf_desc_t cb_desc; + ia_css_circbuf_elem_t cb_elem; + uint32_t ignore_desc_flags = QUEUE_IGNORE_STEP_FLAG; + + QUEUE_CB_DESC_INIT(&cb_desc); + + error = ia_css_queue_load(qhandle, &cb_desc, ignore_desc_flags); + if (error != 0) + return error; + + /* b. Operate on the queue */ + if (ia_css_circbuf_desc_is_empty(&cb_desc)) + return ENODATA; + + error = ia_css_queue_item_load(qhandle, cb_desc.start, &cb_elem); + if (error != 0) + return error; + + *item = cb_elem.val; + + cb_desc.start = OP_std_modadd(cb_desc.start, 1, cb_desc.size); + + /* c. Store the queue object */ + /* Set only fields requiring update with + * valid value. Avoids uncessary calls + * to load/store functions + */ + ignore_desc_flags = QUEUE_IGNORE_SIZE_END_STEP_FLAGS; + error = ia_css_queue_store(qhandle, &cb_desc, ignore_desc_flags); + if (error != 0) + return error; + } + return 0; +} + +int ia_css_queue_is_full( + ia_css_queue_t *qhandle, + bool *is_full) +{ + int error = 0; + if ((qhandle == NULL) || (is_full == NULL)) + return EINVAL; + + /* 1. Load the required queue object */ + if (qhandle->type == IA_CSS_QUEUE_TYPE_LOCAL) { + /* Directly de-ref the object and + * operate on the queue + */ + *is_full = ia_css_circbuf_is_full(&qhandle->desc.cb_local); + return 0; + } else if (qhandle->type == IA_CSS_QUEUE_TYPE_REMOTE) { + /* a. Load the queue from remote */ + ia_css_circbuf_desc_t cb_desc; + uint32_t ignore_desc_flags = QUEUE_IGNORE_STEP_FLAG; + QUEUE_CB_DESC_INIT(&cb_desc); + error = ia_css_queue_load(qhandle, &cb_desc, ignore_desc_flags); + if (error != 0) + return error; + + /* b. Operate on the queue */ + *is_full = ia_css_circbuf_desc_is_full(&cb_desc); + return 0; + } + + return EINVAL; +} + +int ia_css_queue_get_free_space( + ia_css_queue_t *qhandle, + uint32_t *size) +{ + int error = 0; + if ((qhandle == NULL) || (size == NULL)) + return EINVAL; + + /* 1. Load the required queue object */ + if (qhandle->type == IA_CSS_QUEUE_TYPE_LOCAL) { + /* Directly de-ref the object and + * operate on the queue + */ + *size = ia_css_circbuf_get_free_elems(&qhandle->desc.cb_local); + return 0; + } else if (qhandle->type == IA_CSS_QUEUE_TYPE_REMOTE) { + /* a. Load the queue from remote */ + ia_css_circbuf_desc_t cb_desc; + uint32_t ignore_desc_flags = QUEUE_IGNORE_STEP_FLAG; + QUEUE_CB_DESC_INIT(&cb_desc); + error = ia_css_queue_load(qhandle, &cb_desc, ignore_desc_flags); + if (error != 0) + return error; + + /* b. Operate on the queue */ + *size = ia_css_circbuf_desc_get_free_elems(&cb_desc); + return 0; + } + + return EINVAL; +} + +int ia_css_queue_get_used_space( + ia_css_queue_t *qhandle, + uint32_t *size) +{ + int error = 0; + if ((qhandle == NULL) || (size == NULL)) + return EINVAL; + + /* 1. Load the required queue object */ + if (qhandle->type == IA_CSS_QUEUE_TYPE_LOCAL) { + /* Directly de-ref the object and + * operate on the queue + */ + *size = ia_css_circbuf_get_num_elems(&qhandle->desc.cb_local); + return 0; + } else if (qhandle->type == IA_CSS_QUEUE_TYPE_REMOTE) { + /* a. Load the queue from remote */ + ia_css_circbuf_desc_t cb_desc; + uint32_t ignore_desc_flags = QUEUE_IGNORE_STEP_FLAG; + QUEUE_CB_DESC_INIT(&cb_desc); + error = ia_css_queue_load(qhandle, &cb_desc, ignore_desc_flags); + if (error != 0) + return error; + + /* b. Operate on the queue */ + *size = ia_css_circbuf_desc_get_num_elems(&cb_desc); + return 0; + } + + return EINVAL; +} + +int ia_css_queue_peek( + ia_css_queue_t *qhandle, + uint32_t offset, + uint32_t *element) +{ + uint32_t num_elems = 0; + int error = 0; + + if ((qhandle == NULL) || (element == NULL)) + return EINVAL; + + /* 1. Load the required queue object */ + if (qhandle->type == IA_CSS_QUEUE_TYPE_LOCAL) { + /* Directly de-ref the object and + * operate on the queue + */ + /* Check if offset is valid */ + num_elems = ia_css_circbuf_get_num_elems(&qhandle->desc.cb_local); + if (offset > num_elems) + return EINVAL; + + *element = ia_css_circbuf_peek_from_start(&qhandle->desc.cb_local, (int) offset); + return 0; + } else if (qhandle->type == IA_CSS_QUEUE_TYPE_REMOTE) { + /* a. Load the queue from remote */ + ia_css_circbuf_desc_t cb_desc; + ia_css_circbuf_elem_t cb_elem; + uint32_t ignore_desc_flags = QUEUE_IGNORE_STEP_FLAG; + + QUEUE_CB_DESC_INIT(&cb_desc); + + error = ia_css_queue_load(qhandle, &cb_desc, ignore_desc_flags); + if (error != 0) + return error; + + /* Check if offset is valid */ + num_elems = ia_css_circbuf_desc_get_num_elems(&cb_desc); + if (offset > num_elems) + return EINVAL; + + offset = OP_std_modadd(cb_desc.start, offset, cb_desc.size); + error = ia_css_queue_item_load(qhandle, (uint8_t)offset, &cb_elem); + if (error != 0) + return error; + + *element = cb_elem.val; + return 0; + } + + return EINVAL; +} + +int ia_css_queue_is_empty( + ia_css_queue_t *qhandle, + bool *is_empty) +{ + int error = 0; + if ((qhandle == NULL) || (is_empty == NULL)) + return EINVAL; + + /* 1. Load the required queue object */ + if (qhandle->type == IA_CSS_QUEUE_TYPE_LOCAL) { + /* Directly de-ref the object and + * operate on the queue + */ + *is_empty = ia_css_circbuf_is_empty(&qhandle->desc.cb_local); + return 0; + } else if (qhandle->type == IA_CSS_QUEUE_TYPE_REMOTE) { + /* a. Load the queue from remote */ + ia_css_circbuf_desc_t cb_desc; + uint32_t ignore_desc_flags = QUEUE_IGNORE_STEP_FLAG; + + QUEUE_CB_DESC_INIT(&cb_desc); + error = ia_css_queue_load(qhandle, &cb_desc, ignore_desc_flags); + if (error != 0) + return error; + + /* b. Operate on the queue */ + *is_empty = ia_css_circbuf_desc_is_empty(&cb_desc); + return 0; + } + + return EINVAL; +} + +int ia_css_queue_get_size( + ia_css_queue_t *qhandle, + uint32_t *size) +{ + int error = 0; + if ((qhandle == NULL) || (size == NULL)) + return EINVAL; + + /* 1. Load the required queue object */ + if (qhandle->type == IA_CSS_QUEUE_TYPE_LOCAL) { + /* Directly de-ref the object and + * operate on the queue + */ + /* Return maximum usable capacity */ + *size = ia_css_circbuf_get_size(&qhandle->desc.cb_local); + } else if (qhandle->type == IA_CSS_QUEUE_TYPE_REMOTE) { + /* a. Load the queue from remote */ + ia_css_circbuf_desc_t cb_desc; + uint32_t ignore_desc_flags = QUEUE_IGNORE_START_END_STEP_FLAGS; + + QUEUE_CB_DESC_INIT(&cb_desc); + + error = ia_css_queue_load(qhandle, &cb_desc, ignore_desc_flags); + if (error != 0) + return error; + + /* Return maximum usable capacity */ + *size = cb_desc.size; + } + + return 0; +} |