18c2ecf20Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0 28c2ecf20Sopenharmony_ci/* 38c2ecf20Sopenharmony_ci * Copyright (C) STMicroelectronics SA 2015 48c2ecf20Sopenharmony_ci * Authors: Yannick Fertre <yannick.fertre@st.com> 58c2ecf20Sopenharmony_ci * Hugues Fruchet <hugues.fruchet@st.com> 68c2ecf20Sopenharmony_ci */ 78c2ecf20Sopenharmony_ci 88c2ecf20Sopenharmony_ci#include "hva.h" 98c2ecf20Sopenharmony_ci#include "hva-mem.h" 108c2ecf20Sopenharmony_ci 118c2ecf20Sopenharmony_ciint hva_mem_alloc(struct hva_ctx *ctx, u32 size, const char *name, 128c2ecf20Sopenharmony_ci struct hva_buffer **buf) 138c2ecf20Sopenharmony_ci{ 148c2ecf20Sopenharmony_ci struct device *dev = ctx_to_dev(ctx); 158c2ecf20Sopenharmony_ci struct hva_buffer *b; 168c2ecf20Sopenharmony_ci dma_addr_t paddr; 178c2ecf20Sopenharmony_ci void *base; 188c2ecf20Sopenharmony_ci 198c2ecf20Sopenharmony_ci b = devm_kzalloc(dev, sizeof(*b), GFP_KERNEL); 208c2ecf20Sopenharmony_ci if (!b) { 218c2ecf20Sopenharmony_ci ctx->sys_errors++; 228c2ecf20Sopenharmony_ci return -ENOMEM; 238c2ecf20Sopenharmony_ci } 248c2ecf20Sopenharmony_ci 258c2ecf20Sopenharmony_ci base = dma_alloc_attrs(dev, size, &paddr, GFP_KERNEL, 268c2ecf20Sopenharmony_ci DMA_ATTR_WRITE_COMBINE); 278c2ecf20Sopenharmony_ci if (!base) { 288c2ecf20Sopenharmony_ci dev_err(dev, "%s %s : dma_alloc_attrs failed for %s (size=%d)\n", 298c2ecf20Sopenharmony_ci ctx->name, __func__, name, size); 308c2ecf20Sopenharmony_ci ctx->sys_errors++; 318c2ecf20Sopenharmony_ci devm_kfree(dev, b); 328c2ecf20Sopenharmony_ci return -ENOMEM; 338c2ecf20Sopenharmony_ci } 348c2ecf20Sopenharmony_ci 358c2ecf20Sopenharmony_ci b->size = size; 368c2ecf20Sopenharmony_ci b->paddr = paddr; 378c2ecf20Sopenharmony_ci b->vaddr = base; 388c2ecf20Sopenharmony_ci b->name = name; 398c2ecf20Sopenharmony_ci 408c2ecf20Sopenharmony_ci dev_dbg(dev, 418c2ecf20Sopenharmony_ci "%s allocate %d bytes of HW memory @(virt=%p, phy=%pad): %s\n", 428c2ecf20Sopenharmony_ci ctx->name, size, b->vaddr, &b->paddr, b->name); 438c2ecf20Sopenharmony_ci 448c2ecf20Sopenharmony_ci /* return hva buffer to user */ 458c2ecf20Sopenharmony_ci *buf = b; 468c2ecf20Sopenharmony_ci 478c2ecf20Sopenharmony_ci return 0; 488c2ecf20Sopenharmony_ci} 498c2ecf20Sopenharmony_ci 508c2ecf20Sopenharmony_civoid hva_mem_free(struct hva_ctx *ctx, struct hva_buffer *buf) 518c2ecf20Sopenharmony_ci{ 528c2ecf20Sopenharmony_ci struct device *dev = ctx_to_dev(ctx); 538c2ecf20Sopenharmony_ci 548c2ecf20Sopenharmony_ci dev_dbg(dev, 558c2ecf20Sopenharmony_ci "%s free %d bytes of HW memory @(virt=%p, phy=%pad): %s\n", 568c2ecf20Sopenharmony_ci ctx->name, buf->size, buf->vaddr, &buf->paddr, buf->name); 578c2ecf20Sopenharmony_ci 588c2ecf20Sopenharmony_ci dma_free_attrs(dev, buf->size, buf->vaddr, buf->paddr, 598c2ecf20Sopenharmony_ci DMA_ATTR_WRITE_COMBINE); 608c2ecf20Sopenharmony_ci 618c2ecf20Sopenharmony_ci devm_kfree(dev, buf); 628c2ecf20Sopenharmony_ci} 63