Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Yong Zhi | 411 | 100.00% | 1 | 100.00% |
Total | 411 | 1 |
// SPDX-License-Identifier: GPL-2.0 // Copyright (C) 2018 Intel Corporation #include <linux/device.h> #include "ipu3.h" #include "ipu3-css-pool.h" #include "ipu3-dmamap.h" int ipu3_css_dma_buffer_resize(struct imgu_device *imgu, struct ipu3_css_map *map, size_t size) { if (map->size < size && map->vaddr) { dev_warn(&imgu->pci_dev->dev, "dma buf resized from %zu to %zu", map->size, size); ipu3_dmamap_free(imgu, map); if (!ipu3_dmamap_alloc(imgu, map, size)) return -ENOMEM; } return 0; } void ipu3_css_pool_cleanup(struct imgu_device *imgu, struct ipu3_css_pool *pool) { unsigned int i; for (i = 0; i < IPU3_CSS_POOL_SIZE; i++) ipu3_dmamap_free(imgu, &pool->entry[i].param); } int ipu3_css_pool_init(struct imgu_device *imgu, struct ipu3_css_pool *pool, size_t size) { unsigned int i; for (i = 0; i < IPU3_CSS_POOL_SIZE; i++) { pool->entry[i].valid = false; if (size == 0) { pool->entry[i].param.vaddr = NULL; continue; } if (!ipu3_dmamap_alloc(imgu, &pool->entry[i].param, size)) goto fail; } pool->last = IPU3_CSS_POOL_SIZE; return 0; fail: ipu3_css_pool_cleanup(imgu, pool); return -ENOMEM; } /* * Allocate a new parameter via recycling the oldest entry in the pool. */ void ipu3_css_pool_get(struct ipu3_css_pool *pool) { /* Get the oldest entry */ u32 n = (pool->last + 1) % IPU3_CSS_POOL_SIZE; pool->entry[n].valid = true; pool->last = n; } /* * Undo, for all practical purposes, the effect of pool_get(). */ void ipu3_css_pool_put(struct ipu3_css_pool *pool) { pool->entry[pool->last].valid = false; pool->last = (pool->last + IPU3_CSS_POOL_SIZE - 1) % IPU3_CSS_POOL_SIZE; } /** * ipu3_css_pool_last - Retrieve the nth pool entry from last * * @pool: a pointer to &struct ipu3_css_pool. * @n: the distance to the last index. * * Returns: * The nth entry from last or null map to indicate no frame stored. */ const struct ipu3_css_map * ipu3_css_pool_last(struct ipu3_css_pool *pool, unsigned int n) { static const struct ipu3_css_map null_map = { 0 }; int i = (pool->last + IPU3_CSS_POOL_SIZE - n) % IPU3_CSS_POOL_SIZE; WARN_ON(n >= IPU3_CSS_POOL_SIZE); if (!pool->entry[i].valid) return &null_map; return &pool->entry[i].param; }
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with Cregit http://github.com/cregit/cregit
Version 2.0-RC1