diff options
Diffstat (limited to 'drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/rmgr/src/rmgr_vbuf.c')
-rw-r--r-- | drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/rmgr/src/rmgr_vbuf.c | 330 |
1 files changed, 330 insertions, 0 deletions
diff --git a/drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/rmgr/src/rmgr_vbuf.c b/drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/rmgr/src/rmgr_vbuf.c new file mode 100644 index 0000000..fa92d8d --- /dev/null +++ b/drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/rmgr/src/rmgr_vbuf.c @@ -0,0 +1,330 @@ +/* + * Support for Intel Camera Imaging ISP subsystem. + * Copyright (c) 2010-2015, 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_rmgr.h" + +#include <type_support.h> +#include <assert_support.h> +#include <platform_support.h> /* memset */ +#include <memory_access.h> /* mmmgr_malloc, mhmm_free */ +#include <ia_css_debug.h> + +/** + * @brief VBUF resource handles + */ +#define NUM_HANDLES 1000 +struct ia_css_rmgr_vbuf_handle handle_table[NUM_HANDLES]; + +/** + * @brief VBUF resource pool - refpool + */ +struct ia_css_rmgr_vbuf_pool refpool = { + false, /* copy_on_write */ + false, /* recycle */ + 0, /* size */ + 0, /* index */ + NULL, /* handles */ +}; + +/** + * @brief VBUF resource pool - writepool + */ +struct ia_css_rmgr_vbuf_pool writepool = { + true, /* copy_on_write */ + false, /* recycle */ + 0, /* size */ + 0, /* index */ + NULL, /* handles */ +}; + +/** + * @brief VBUF resource pool - hmmbufferpool + */ +struct ia_css_rmgr_vbuf_pool hmmbufferpool = { + true, /* copy_on_write */ + true, /* recycle */ + 32, /* size */ + 0, /* index */ + NULL, /* handles */ +}; + +struct ia_css_rmgr_vbuf_pool *vbuf_ref = &refpool; +struct ia_css_rmgr_vbuf_pool *vbuf_write = &writepool; +struct ia_css_rmgr_vbuf_pool *hmm_buffer_pool = &hmmbufferpool; + +/** + * @brief Initialize the reference count (host, vbuf) + */ +static void rmgr_refcount_init_vbuf(void) +{ + /* initialize the refcount table */ + memset(&handle_table, 0, sizeof(handle_table)); +} + +/** + * @brief Retain the reference count for a handle (host, vbuf) + * + * @param handle The pointer to the handle + */ +void ia_css_rmgr_refcount_retain_vbuf(struct ia_css_rmgr_vbuf_handle **handle) +{ + int i; + struct ia_css_rmgr_vbuf_handle *h; + if ((handle == NULL) || (*handle == NULL)) { + IA_CSS_LOG("Invalid inputs"); + return; + } + /* new vbuf to count on */ + if ((*handle)->count == 0) { + h = *handle; + *handle = NULL; + for (i = 0; i < NUM_HANDLES; i++) { + if (handle_table[i].count == 0) { + *handle = &handle_table[i]; + break; + } + } + /* if the loop dus not break and *handle == NULL + this is an error handle and report it. + */ + if (*handle == NULL) { + ia_css_debug_dtrace(IA_CSS_DEBUG_ERROR, + "ia_css_i_host_refcount_retain_vbuf() failed to find empty slot!\n"); + return; + } + (*handle)->vptr = h->vptr; + (*handle)->size = h->size; + } + (*handle)->count++; +} + +/** + * @brief Release the reference count for a handle (host, vbuf) + * + * @param handle The pointer to the handle + */ +void ia_css_rmgr_refcount_release_vbuf(struct ia_css_rmgr_vbuf_handle **handle) +{ + if ((handle == NULL) || ((*handle) == NULL) || (((*handle)->count) == 0)) { + ia_css_debug_dtrace(IA_CSS_DEBUG_ERROR, + "ia_css_rmgr_refcount_release_vbuf() invalid arguments!\n"); + return; + } + /* decrease reference count */ + (*handle)->count--; + /* remove from admin */ + if ((*handle)->count == 0) { + (*handle)->vptr = 0x0; + (*handle)->size = 0; + *handle = NULL; + } +} + +/** + * @brief Initialize the resource pool (host, vbuf) + * + * @param pool The pointer to the pool + */ +enum ia_css_err ia_css_rmgr_init_vbuf(struct ia_css_rmgr_vbuf_pool *pool) +{ + enum ia_css_err err = IA_CSS_SUCCESS; + size_t bytes_needed; + rmgr_refcount_init_vbuf(); + assert(pool != NULL); + if (pool == NULL) + return IA_CSS_ERR_INVALID_ARGUMENTS; + /* initialize the recycle pool if used */ + if (pool->recycle && pool->size) { + /* allocate memory for storing the handles */ + bytes_needed = + sizeof(void *) * + pool->size; + pool->handles = sh_css_malloc(bytes_needed); + if (pool->handles != NULL) + memset(pool->handles, 0, bytes_needed); + else + err = IA_CSS_ERR_CANNOT_ALLOCATE_MEMORY; + } else { + /* just in case, set the size to 0 */ + pool->size = 0; + pool->handles = NULL; + } + return err; +} + +/** + * @brief Uninitialize the resource pool (host, vbuf) + * + * @param pool The pointer to the pool + */ +void ia_css_rmgr_uninit_vbuf(struct ia_css_rmgr_vbuf_pool *pool) +{ + uint32_t i; + ia_css_debug_dtrace(IA_CSS_DEBUG_TRACE, "ia_css_rmgr_uninit_vbuf()\n"); + if (pool == NULL) { + ia_css_debug_dtrace(IA_CSS_DEBUG_ERROR, "ia_css_rmgr_uninit_vbuf(): NULL argument\n"); + return; + } + if (pool->handles != NULL) { + /* free the hmm buffers */ + for (i = 0; i < pool->size; i++) { + if (pool->handles[i] != NULL) { + ia_css_debug_dtrace(IA_CSS_DEBUG_TRACE, + " freeing/releasing %x (count=%d)\n", + pool->handles[i]->vptr, + pool->handles[i]->count); + /* free memory */ + hmm_free(pool->handles[i]->vptr); + /* remove from refcount admin */ + ia_css_rmgr_refcount_release_vbuf( + &pool->handles[i]); + } + } + /* now free the pool handles list */ + sh_css_free(pool->handles); + pool->handles = NULL; + } +} + +/** + * @brief Push a handle to the pool + * + * @param pool The pointer to the pool + * @param handle The pointer to the handle + */ +static +void rmgr_push_handle(struct ia_css_rmgr_vbuf_pool *pool, + struct ia_css_rmgr_vbuf_handle **handle) +{ + uint32_t i; + bool succes = false; + assert(pool != NULL); + assert(pool->recycle); + assert(pool->handles != NULL); + assert(handle != NULL); + for (i = 0; i < pool->size; i++) { + if (pool->handles[i] == NULL) { + ia_css_rmgr_refcount_retain_vbuf(handle); + pool->handles[i] = *handle; + succes = true; + break; + } + } + assert(succes); +} + +/** + * @brief Pop a handle from the pool + * + * @param pool The pointer to the pool + * @param handle The pointer to the handle + */ +static +void rmgr_pop_handle(struct ia_css_rmgr_vbuf_pool *pool, + struct ia_css_rmgr_vbuf_handle **handle) +{ + uint32_t i; + bool succes = false; + assert(pool != NULL); + assert(pool->recycle); + assert(pool->handles != NULL); + assert(handle != NULL); + assert(*handle != NULL); + for (i = 0; i < pool->size; i++) { + if ((pool->handles[i] != NULL) && + (pool->handles[i]->size == (*handle)->size)) { + *handle = pool->handles[i]; + pool->handles[i] = NULL; + /* dont release, we are returning it... + ia_css_rmgr_refcount_release_vbuf(handle); */ + succes = true; + break; + } + } +} + +/** + * @brief Acquire a handle from the pool (host, vbuf) + * + * @param pool The pointer to the pool + * @param handle The pointer to the handle + */ +void ia_css_rmgr_acq_vbuf(struct ia_css_rmgr_vbuf_pool *pool, + struct ia_css_rmgr_vbuf_handle **handle) +{ + struct ia_css_rmgr_vbuf_handle h; + + if ((pool == NULL) || (handle == NULL) || (*handle == NULL)) { + IA_CSS_LOG("Invalid inputs"); + return; + } + + if (pool->copy_on_write) { + /* only one reference, reuse (no new retain) */ + if ((*handle)->count == 1) + return; + /* more than one reference, release current buffer */ + if ((*handle)->count > 1) { + /* store current values */ + h.vptr = 0x0; + h.size = (*handle)->size; + /* release ref to current buffer */ + ia_css_rmgr_refcount_release_vbuf(handle); + *handle = &h; + } + /* get new buffer for needed size */ + if ((*handle)->vptr == 0x0) { + if (pool->recycle) { + /* try and pop from pool */ + rmgr_pop_handle(pool, handle); + } + if ((*handle)->vptr == 0x0) { + /* we need to allocate */ + (*handle)->vptr = mmgr_malloc((*handle)->size); + } else { + /* we popped a buffer */ + return; + } + } + } + /* Note that handle will change to an internally maintained one */ + ia_css_rmgr_refcount_retain_vbuf(handle); +} + +/** + * @brief Release a handle to the pool (host, vbuf) + * + * @param pool The pointer to the pool + * @param handle The pointer to the handle + */ +void ia_css_rmgr_rel_vbuf(struct ia_css_rmgr_vbuf_pool *pool, + struct ia_css_rmgr_vbuf_handle **handle) +{ + if ((pool == NULL) || (handle == NULL) || (*handle == NULL)) { + IA_CSS_LOG("Invalid inputs"); + return; + } + /* release the handle */ + if ((*handle)->count == 1) { + if (!pool->recycle) { + /* non recycling pool, free mem */ + hmm_free((*handle)->vptr); + } else { + /* recycle to pool */ + rmgr_push_handle(pool, handle); + } + } + ia_css_rmgr_refcount_release_vbuf(handle); + *handle = NULL; +} |