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path: root/drivers/staging/media/atomisp/pci/atomisp2/hmm/hmm_reserved_pool.c
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Diffstat (limited to 'drivers/staging/media/atomisp/pci/atomisp2/hmm/hmm_reserved_pool.c')
-rw-r--r--drivers/staging/media/atomisp/pci/atomisp2/hmm/hmm_reserved_pool.c252
1 files changed, 0 insertions, 252 deletions
diff --git a/drivers/staging/media/atomisp/pci/atomisp2/hmm/hmm_reserved_pool.c b/drivers/staging/media/atomisp/pci/atomisp2/hmm/hmm_reserved_pool.c
deleted file mode 100644
index f300e7547997..000000000000
--- a/drivers/staging/media/atomisp/pci/atomisp2/hmm/hmm_reserved_pool.c
+++ /dev/null
@@ -1,252 +0,0 @@
-/*
- * Support for Medifield PNW Camera Imaging ISP subsystem.
- *
- * Copyright (c) 2010 Intel Corporation. All Rights Reserved.
- *
- * Copyright (c) 2010 Silicon Hive www.siliconhive.com.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that 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.
- *
- *
- */
-/*
- * This file contains functions for reserved memory pool management
- */
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/mm.h>
-
-#include <asm/set_memory.h>
-
-#include "atomisp_internal.h"
-#include "hmm/hmm_pool.h"
-
-/*
- * reserved memory pool ops.
- */
-static unsigned int get_pages_from_reserved_pool(void *pool,
- struct hmm_page_object *page_obj,
- unsigned int size, bool cached)
-{
- unsigned long flags;
- unsigned int i = 0;
- unsigned int repool_pgnr;
- int j;
- struct hmm_reserved_pool_info *repool_info = pool;
-
- if (!repool_info)
- return 0;
-
- spin_lock_irqsave(&repool_info->list_lock, flags);
- if (repool_info->initialized) {
- repool_pgnr = repool_info->index;
-
- for (j = repool_pgnr-1; j >= 0; j--) {
- page_obj[i].page = repool_info->pages[j];
- page_obj[i].type = HMM_PAGE_TYPE_RESERVED;
- i++;
- repool_info->index--;
- if (i == size)
- break;
- }
- }
- spin_unlock_irqrestore(&repool_info->list_lock, flags);
- return i;
-}
-
-static void free_pages_to_reserved_pool(void *pool,
- struct hmm_page_object *page_obj)
-{
- unsigned long flags;
- struct hmm_reserved_pool_info *repool_info = pool;
-
- if (!repool_info)
- return;
-
- spin_lock_irqsave(&repool_info->list_lock, flags);
-
- if (repool_info->initialized &&
- repool_info->index < repool_info->pgnr &&
- page_obj->type == HMM_PAGE_TYPE_RESERVED) {
- repool_info->pages[repool_info->index++] = page_obj->page;
- }
-
- spin_unlock_irqrestore(&repool_info->list_lock, flags);
-}
-
-static int hmm_reserved_pool_setup(struct hmm_reserved_pool_info **repool_info,
- unsigned int pool_size)
-{
- struct hmm_reserved_pool_info *pool_info;
-
- pool_info = kmalloc(sizeof(struct hmm_reserved_pool_info),
- GFP_KERNEL);
- if (unlikely(!pool_info))
- return -ENOMEM;
-
- pool_info->pages = kmalloc(sizeof(struct page *) * pool_size,
- GFP_KERNEL);
- if (unlikely(!pool_info->pages)) {
- kfree(pool_info);
- return -ENOMEM;
- }
-
- pool_info->index = 0;
- pool_info->pgnr = 0;
- spin_lock_init(&pool_info->list_lock);
- pool_info->initialized = true;
-
- *repool_info = pool_info;
-
- return 0;
-}
-
-static int hmm_reserved_pool_init(void **pool, unsigned int pool_size)
-{
- int ret;
- unsigned int blk_pgnr;
- unsigned int pgnr = pool_size;
- unsigned int order = 0;
- unsigned int i = 0;
- int fail_number = 0;
- struct page *pages;
- int j;
- struct hmm_reserved_pool_info *repool_info;
- if (pool_size == 0)
- return 0;
-
- ret = hmm_reserved_pool_setup(&repool_info, pool_size);
- if (ret) {
- dev_err(atomisp_dev, "hmm_reserved_pool_setup failed.\n");
- return ret;
- }
-
- pgnr = pool_size;
-
- i = 0;
- order = MAX_ORDER;
-
- while (pgnr) {
- blk_pgnr = 1U << order;
- while (blk_pgnr > pgnr) {
- order--;
- blk_pgnr >>= 1U;
- }
- BUG_ON(order > MAX_ORDER);
-
- pages = alloc_pages(GFP_KERNEL | __GFP_NOWARN, order);
- if (unlikely(!pages)) {
- if (order == 0) {
- fail_number++;
- dev_err(atomisp_dev, "%s: alloc_pages failed: %d\n",
- __func__, fail_number);
- /* if fail five times, will goto end */
-
- /* FIXME: whether is the mechanism is ok? */
- if (fail_number == ALLOC_PAGE_FAIL_NUM)
- goto end;
- } else {
- order--;
- }
- } else {
- blk_pgnr = 1U << order;
-
- ret = set_pages_uc(pages, blk_pgnr);
- if (ret) {
- dev_err(atomisp_dev,
- "set pages uncached failed\n");
- __free_pages(pages, order);
- goto end;
- }
-
- for (j = 0; j < blk_pgnr; j++)
- repool_info->pages[i++] = pages + j;
-
- repool_info->index += blk_pgnr;
- repool_info->pgnr += blk_pgnr;
-
- pgnr -= blk_pgnr;
-
- fail_number = 0;
- }
- }
-
-end:
- repool_info->initialized = true;
-
- *pool = repool_info;
-
- dev_info(atomisp_dev,
- "hmm_reserved_pool init successfully,"
- "hmm_reserved_pool is with %d pages.\n",
- repool_info->pgnr);
- return 0;
-}
-
-static void hmm_reserved_pool_exit(void **pool)
-{
- unsigned long flags;
- int i, ret;
- unsigned int pgnr;
- struct hmm_reserved_pool_info *repool_info = *pool;
-
- if (!repool_info)
- return;
-
- spin_lock_irqsave(&repool_info->list_lock, flags);
- if (!repool_info->initialized) {
- spin_unlock_irqrestore(&repool_info->list_lock, flags);
- return;
- }
- pgnr = repool_info->pgnr;
- repool_info->index = 0;
- repool_info->pgnr = 0;
- repool_info->initialized = false;
- spin_unlock_irqrestore(&repool_info->list_lock, flags);
-
- for (i = 0; i < pgnr; i++) {
- ret = set_pages_wb(repool_info->pages[i], 1);
- if (ret)
- dev_err(atomisp_dev,
- "set page to WB err...ret=%d\n", ret);
- /*
- W/A: set_pages_wb seldom return value = -EFAULT
- indicate that address of page is not in valid
- range(0xffff880000000000~0xffffc7ffffffffff)
- then, _free_pages would panic; Do not know why
- page address be valid, it maybe memory corruption by lowmemory
- */
- if (!ret)
- __free_pages(repool_info->pages[i], 0);
- }
-
- kfree(repool_info->pages);
- kfree(repool_info);
-
- *pool = NULL;
-}
-
-static int hmm_reserved_pool_inited(void *pool)
-{
- struct hmm_reserved_pool_info *repool_info = pool;
-
- if (!repool_info)
- return 0;
-
- return repool_info->initialized;
-}
-
-struct hmm_pool_ops reserved_pops = {
- .pool_init = hmm_reserved_pool_init,
- .pool_exit = hmm_reserved_pool_exit,
- .pool_alloc_pages = get_pages_from_reserved_pool,
- .pool_free_pages = free_pages_to_reserved_pool,
- .pool_inited = hmm_reserved_pool_inited,
-};
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