1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) STMicroelectronics SA 2015 4 * Authors: Yannick Fertre <yannick.fertre@st.com> 5 * Hugues Fruchet <hugues.fruchet@st.com> 6 */ 7 8 #include "hva.h" 9 #include "hva-mem.h" 10 11 int hva_mem_alloc(struct hva_ctx *ctx, u32 size, const char *name, 12 struct hva_buffer **buf) 13 { 14 struct device *dev = ctx_to_dev(ctx); 15 struct hva_buffer *b; 16 dma_addr_t paddr; 17 void *base; 18 19 b = devm_kzalloc(dev, sizeof(*b), GFP_KERNEL); 20 if (!b) { 21 ctx->sys_errors++; 22 return -ENOMEM; 23 } 24 25 base = dma_alloc_attrs(dev, size, &paddr, GFP_KERNEL, 26 DMA_ATTR_WRITE_COMBINE); 27 if (!base) { 28 dev_err(dev, "%s %s : dma_alloc_attrs failed for %s (size=%d)\n", 29 ctx->name, __func__, name, size); 30 ctx->sys_errors++; 31 devm_kfree(dev, b); 32 return -ENOMEM; 33 } 34 35 b->size = size; 36 b->paddr = paddr; 37 b->vaddr = base; 38 b->name = name; 39 40 dev_dbg(dev, 41 "%s allocate %d bytes of HW memory @(virt=%p, phy=%pad): %s\n", 42 ctx->name, size, b->vaddr, &b->paddr, b->name); 43 44 /* return hva buffer to user */ 45 *buf = b; 46 47 return 0; 48 } 49 50 void hva_mem_free(struct hva_ctx *ctx, struct hva_buffer *buf) 51 { 52 struct device *dev = ctx_to_dev(ctx); 53 54 dev_dbg(dev, 55 "%s free %d bytes of HW memory @(virt=%p, phy=%pad): %s\n", 56 ctx->name, buf->size, buf->vaddr, &buf->paddr, buf->name); 57 58 dma_free_attrs(dev, buf->size, buf->vaddr, buf->paddr, 59 DMA_ATTR_WRITE_COMBINE); 60 61 devm_kfree(dev, buf); 62 } 63