From patchwork Mon Dec 5 17:11:29 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hugues FRUCHET X-Patchwork-Id: 9461227 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 522746022E for ; Mon, 5 Dec 2016 17:12:00 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3F7FF27C0C for ; Mon, 5 Dec 2016 17:12:00 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 347AA27DCE; Mon, 5 Dec 2016 17:12:00 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C5AA627C0C for ; Mon, 5 Dec 2016 17:11:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751667AbcLERLx (ORCPT ); Mon, 5 Dec 2016 12:11:53 -0500 Received: from mx08-00178001.pphosted.com ([91.207.212.93]:43013 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752009AbcLERLt (ORCPT ); Mon, 5 Dec 2016 12:11:49 -0500 Received: from pps.filterd (m0046661.ppops.net [127.0.0.1]) by mx08-00178001.pphosted.com (8.16.0.11/8.16.0.11) with SMTP id uB5H3lZK022804; Mon, 5 Dec 2016 18:11:47 +0100 Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx08-.pphosted.com with ESMTP id 2756tmt9t2-1 (version=TLSv1 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NOT); Mon, 05 Dec 2016 18:11:47 +0100 Received: from zeta.dmz-eu.st.com (zeta.dmz-eu.st.com [164.129.230.9]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 9D95F38; Mon, 5 Dec 2016 17:11:46 +0000 (GMT) Received: from Webmail-eu.st.com (Safex1hubcas21.st.com [10.75.90.44]) by zeta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 866B64FA6; Mon, 5 Dec 2016 17:11:46 +0000 (GMT) Received: from localhost (10.201.23.73) by Webmail-ga.st.com (10.75.90.48) with Microsoft SMTP Server (TLS) id 14.3.294.0; Mon, 5 Dec 2016 18:11:46 +0100 From: Hugues Fruchet To: , Hans Verkuil CC: , Benjamin Gaignard , Hugues Fruchet , Jean-Christophe Trotin Subject: [PATCH v4 06/10] [media] st-delta: add memory allocator helper functions Date: Mon, 5 Dec 2016 18:11:29 +0100 Message-ID: <1480957893-25636-7-git-send-email-hugues.fruchet@st.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1480957893-25636-1-git-send-email-hugues.fruchet@st.com> References: <1480957893-25636-1-git-send-email-hugues.fruchet@st.com> MIME-Version: 1.0 X-Originating-IP: [10.201.23.73] X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2016-12-05_13:, , signatures=0 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Helper functions used by decoder back-ends to allocate physically contiguous memory required by hardware video decoder. 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 07ba7ad..cbfb1b5 100644 --- a/drivers/media/platform/sti/delta/Makefile +++ b/drivers/media/platform/sti/delta/Makefile @@ -1,2 +1,2 @@ obj-$(CONFIG_VIDEO_STI_DELTA) := 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; /*