From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mx08-00178001.pphosted.com ([91.207.212.93]:55523 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751143AbdBBPAb (ORCPT ); Thu, 2 Feb 2017 10:00:31 -0500 From: Hugues Fruchet To: , Hans Verkuil CC: , Benjamin Gaignard , Hugues Fruchet , Jean-Christophe Trotin Subject: [PATCH v7 06/10] [media] st-delta: add memory allocator helper functions Date: Thu, 2 Feb 2017 15:59:49 +0100 Message-ID: <1486047593-18581-7-git-send-email-hugues.fruchet@st.com> In-Reply-To: <1486047593-18581-1-git-send-email-hugues.fruchet@st.com> References: <1486047593-18581-1-git-send-email-hugues.fruchet@st.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-media-owner@vger.kernel.org List-ID: Helper functions used by decoder back-ends to allocate physically contiguous memory required by hardware video decoder. Acked-by: Peter Griffin Signed-off-by: Hugues Fruchet --- drivers/media/platform/sti/delta/Makefile | 2 +- drivers/media/platform/sti/delta/delta-mem.c | 51 ++++++++++++++++++++++++++++ drivers/media/platform/sti/delta/delta-mem.h | 14 ++++++++ drivers/media/platform/sti/delta/delta.h | 8 +++++ 4 files changed, 74 insertions(+), 1 deletion(-) create mode 100644 drivers/media/platform/sti/delta/delta-mem.c create mode 100644 drivers/media/platform/sti/delta/delta-mem.h diff --git a/drivers/media/platform/sti/delta/Makefile b/drivers/media/platform/sti/delta/Makefile index 467519e..93a3037 100644 --- a/drivers/media/platform/sti/delta/Makefile +++ b/drivers/media/platform/sti/delta/Makefile @@ -1,2 +1,2 @@ obj-$(CONFIG_VIDEO_STI_DELTA_DRIVER) := st-delta.o -st-delta-y := delta-v4l2.o +st-delta-y := delta-v4l2.o delta-mem.o diff --git a/drivers/media/platform/sti/delta/delta-mem.c b/drivers/media/platform/sti/delta/delta-mem.c new file mode 100644 index 0000000..d7b53d3 --- /dev/null +++ b/drivers/media/platform/sti/delta/delta-mem.c @@ -0,0 +1,51 @@ +/* + * Copyright (C) STMicroelectronics SA 2015 + * Author: Hugues Fruchet for STMicroelectronics. + * License terms: GNU General Public License (GPL), version 2 + */ + +#include "delta.h" +#include "delta-mem.h" + +int hw_alloc(struct delta_ctx *ctx, u32 size, const char *name, + struct delta_buf *buf) +{ + struct delta_dev *delta = ctx->dev; + dma_addr_t dma_addr; + void *addr; + unsigned long attrs = DMA_ATTR_WRITE_COMBINE; + + addr = dma_alloc_attrs(delta->dev, size, &dma_addr, + GFP_KERNEL | __GFP_NOWARN, attrs); + if (!addr) { + dev_err(delta->dev, + "%s hw_alloc:dma_alloc_coherent failed for %s (size=%d)\n", + ctx->name, name, size); + ctx->sys_errors++; + return -ENOMEM; + } + + buf->size = size; + buf->paddr = dma_addr; + buf->vaddr = addr; + buf->name = name; + buf->attrs = attrs; + + dev_dbg(delta->dev, + "%s allocate %d bytes of HW memory @(virt=0x%p, phy=0x%pad): %s\n", + ctx->name, size, buf->vaddr, &buf->paddr, buf->name); + + return 0; +} + +void hw_free(struct delta_ctx *ctx, struct delta_buf *buf) +{ + struct delta_dev *delta = ctx->dev; + + dev_dbg(delta->dev, + "%s free %d bytes of HW memory @(virt=0x%p, phy=0x%pad): %s\n", + ctx->name, buf->size, buf->vaddr, &buf->paddr, buf->name); + + dma_free_attrs(delta->dev, buf->size, + buf->vaddr, buf->paddr, buf->attrs); +} diff --git a/drivers/media/platform/sti/delta/delta-mem.h b/drivers/media/platform/sti/delta/delta-mem.h new file mode 100644 index 0000000..f8ca109 --- /dev/null +++ b/drivers/media/platform/sti/delta/delta-mem.h @@ -0,0 +1,14 @@ +/* + * Copyright (C) STMicroelectronics SA 2015 + * Author: Hugues Fruchet for STMicroelectronics. + * License terms: GNU General Public License (GPL), version 2 + */ + +#ifndef DELTA_MEM_H +#define DELTA_MEM_H + +int hw_alloc(struct delta_ctx *ctx, u32 size, const char *name, + struct delta_buf *buf); +void hw_free(struct delta_ctx *ctx, struct delta_buf *buf); + +#endif /* DELTA_MEM_H */ diff --git a/drivers/media/platform/sti/delta/delta.h b/drivers/media/platform/sti/delta/delta.h index 74a4240..9e26525 100644 --- a/drivers/media/platform/sti/delta/delta.h +++ b/drivers/media/platform/sti/delta/delta.h @@ -191,6 +191,14 @@ struct delta_dts { u64 val; }; +struct delta_buf { + u32 size; + void *vaddr; + dma_addr_t paddr; + const char *name; + unsigned long attrs; +}; + struct delta_ctx; /* -- 1.9.1