1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) STMicroelectronics SA 2015 4 * Author: Hugues Fruchet <hugues.fruchet@st.com> for STMicroelectronics. 5 */ 6 7 #include "delta.h" 8 #include "delta-mem.h" 9 10 int hw_alloc(struct delta_ctx *ctx, u32 size, const char *name, 11 struct delta_buf *buf) 12 { 13 struct delta_dev *delta = ctx->dev; 14 dma_addr_t dma_addr; 15 void *addr; 16 unsigned long attrs = DMA_ATTR_WRITE_COMBINE; 17 18 addr = dma_alloc_attrs(delta->dev, size, &dma_addr, 19 GFP_KERNEL | __GFP_NOWARN, attrs); 20 if (!addr) { 21 dev_err(delta->dev, 22 "%s hw_alloc:dma_alloc_coherent failed for %s (size=%d)\n", 23 ctx->name, name, size); 24 ctx->sys_errors++; 25 return -ENOMEM; 26 } 27 28 buf->size = size; 29 buf->paddr = dma_addr; 30 buf->vaddr = addr; 31 buf->name = name; 32 buf->attrs = attrs; 33 34 dev_dbg(delta->dev, 35 "%s allocate %d bytes of HW memory @(virt=0x%p, phy=0x%pad): %s\n", 36 ctx->name, size, buf->vaddr, &buf->paddr, buf->name); 37 38 return 0; 39 } 40 41 void hw_free(struct delta_ctx *ctx, struct delta_buf *buf) 42 { 43 struct delta_dev *delta = ctx->dev; 44 45 dev_dbg(delta->dev, 46 "%s free %d bytes of HW memory @(virt=0x%p, phy=0x%pad): %s\n", 47 ctx->name, buf->size, buf->vaddr, &buf->paddr, buf->name); 48 49 dma_free_attrs(delta->dev, buf->size, 50 buf->vaddr, buf->paddr, buf->attrs); 51 } 52