From patchwork Wed Jan 16 01:39:23 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?Q0sgSHUgKOiDoeS/iuWFiSk=?= X-Patchwork-Id: 10765323 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 08FEA91E for ; Wed, 16 Jan 2019 01:40:12 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E8B462D2E0 for ; Wed, 16 Jan 2019 01:40:11 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id DD1B82D2EC; Wed, 16 Jan 2019 01:40:11 +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=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 783E62D2E0 for ; Wed, 16 Jan 2019 01:40:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=LDhRS4qv0az+fBhUnx274QI2DnbEC587e2zqkulhDMQ=; b=GNZKyxurh5oV9L 7rReXjoIQYPlsWBrK1ToFVyj0Tl+Jj02OxdIOPDzINuELMoXzBt3MwahiQTT22nvMSdqOVCgliCs7 ByLaNO0HVM5z26O4lh/xVN357T0RjZLtKqugnfOHdj+tXOTc3GdYAZCxfIa0Ay76te2mgOmiuFvm7 JUOYiKm+/EFjlbTSwBUkCVQBjBQjqrvpxP4rTIuF2FtTx0a9mKgT1MrXM+e3tYQbH5tnD7gyFDzqr gPhy7uY4wRTisMupa+X+jz+wFD2eiAx6r/QecK5HCG+iNtF15XgDDvRszosmz7kPcKcCeS89RnLIL YfmHLamr6/ihD7Lc90ZQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gjaBc-0008LF-OQ; Wed, 16 Jan 2019 01:40:08 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gjaB8-0007dP-AV; Wed, 16 Jan 2019 01:39:40 +0000 X-UUID: 75ceac8bc93b4781b02952a39e9d59d3-20190115 X-UUID: 75ceac8bc93b4781b02952a39e9d59d3-20190115 Received: from mtkcas66.mediatek.inc [(172.29.193.44)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 467075706; Tue, 15 Jan 2019 17:39:32 -0800 Received: from MTKMBS01N1.mediatek.inc (172.21.101.68) by MTKMBS62N2.mediatek.inc (172.29.193.42) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Tue, 15 Jan 2019 17:39:30 -0800 Received: from MTKCAS06.mediatek.inc (172.21.101.30) by mtkmbs01n1.mediatek.inc (172.21.101.68) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Wed, 16 Jan 2019 09:39:28 +0800 Received: from mtkslt305.mediatek.inc (10.21.14.140) by MTKCAS06.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Wed, 16 Jan 2019 09:39:28 +0800 From: CK Hu To: =?unknown-8bit?q?Philipp_Zabel_=3Cp=2Ezabel=40pengutronix=2Ede=3E=2C_Dav?= =?unknown-8bit?q?id_Airlie_=3Cairlied=40linux=2Eie=3E=2C_Daniel_Vetter_=3Cd?= =?unknown-8bit?q?aniel=40ffwll=2Ech=3E=2C_Matthias_Brugger_=3Cmatthias=2Ebg?= =?unknown-8bit?q?g=40gmail=2Ecom=3E=2C_Noralf_Tr=F8nnes__=3Cnoralf=40tronne?= =?unknown-8bit?q?s=2Eorg=3E=2C_Frank_Wunderlich_=3Cfrank-w=40public-files?= =?unknown-8bit?q?=2Ede=3E?= Subject: [PATCH 1/2] drm/mediatek: Implement gem prime vmap/vunmap function Date: Wed, 16 Jan 2019 09:39:23 +0800 Message-ID: <20190116013924.11345-1-ck.hu@mediatek.com> X-Mailer: git-send-email 2.18.1 MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190115_173938_371124_3FCA17A7 X-CRM114-Status: GOOD ( 10.54 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: srv_heupstream@mediatek.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-mediatek@lists.infradead.org, CK Hu , linux-arm-kernel@lists.infradead.org Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+patchwork-linux-mediatek=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP For some application which need kernel virtual address, such as fbcon, implement these function to map/unmap kernel virtual address of prime buffer. Signed-off-by: CK Hu --- drivers/gpu/drm/mediatek/mtk_drm_drv.c | 2 ++ drivers/gpu/drm/mediatek/mtk_drm_gem.c | 46 ++++++++++++++++++++++++++ drivers/gpu/drm/mediatek/mtk_drm_gem.h | 3 ++ 3 files changed, 51 insertions(+) diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c index 6422e99952fe..6ec4ca070382 100644 --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c @@ -341,6 +341,8 @@ static struct drm_driver mtk_drm_driver = { .gem_prime_get_sg_table = mtk_gem_prime_get_sg_table, .gem_prime_import_sg_table = mtk_gem_prime_import_sg_table, .gem_prime_mmap = mtk_drm_gem_mmap_buf, + .gem_prime_vmap = mtk_drm_gem_prime_vmap, + .gem_prime_vunmap = mtk_drm_gem_prime_vunmap, .fops = &mtk_drm_fops, .name = DRIVER_NAME, diff --git a/drivers/gpu/drm/mediatek/mtk_drm_gem.c b/drivers/gpu/drm/mediatek/mtk_drm_gem.c index 259b7b0de1d2..38483e9ee071 100644 --- a/drivers/gpu/drm/mediatek/mtk_drm_gem.c +++ b/drivers/gpu/drm/mediatek/mtk_drm_gem.c @@ -241,3 +241,49 @@ struct drm_gem_object *mtk_gem_prime_import_sg_table(struct drm_device *dev, kfree(mtk_gem); return ERR_PTR(ret); } + +void *mtk_drm_gem_prime_vmap(struct drm_gem_object *obj) +{ + struct mtk_drm_gem_obj *mtk_gem = to_mtk_gem_obj(obj); + struct sg_table *sgt; + struct sg_page_iter iter; + unsigned int npages; + unsigned int i = 0; + + if (mtk_gem->kvaddr) + return mtk_gem->kvaddr; + + sgt = mtk_gem_prime_get_sg_table(obj); + if (IS_ERR(sgt)) + return NULL; + + npages = obj->size >> PAGE_SHIFT; + mtk_gem->pages = kcalloc(npages, sizeof(*mtk_gem->pages), GFP_KERNEL); + if (!mtk_gem->pages) + goto out; + + for_each_sg_page(sgt->sgl, &iter, sgt->orig_nents, 0) { + mtk_gem->pages[i++] = sg_page_iter_page(&iter); + if (i > npages) + break; + } + mtk_gem->kvaddr = vmap(mtk_gem->pages, npages, VM_MAP, + pgprot_writecombine(PAGE_KERNEL)); + +out: + kfree((void *)sgt); + + return mtk_gem->kvaddr; +} + +void mtk_drm_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr) +{ + struct mtk_drm_gem_obj *mtk_gem = to_mtk_gem_obj(obj); + + if (!mtk_gem->pages) + return; + + vunmap(vaddr); + mtk_gem->kvaddr = 0; + kfree((void *)mtk_gem->pages); +} diff --git a/drivers/gpu/drm/mediatek/mtk_drm_gem.h b/drivers/gpu/drm/mediatek/mtk_drm_gem.h index 534639b43a1c..c047a7ef294f 100644 --- a/drivers/gpu/drm/mediatek/mtk_drm_gem.h +++ b/drivers/gpu/drm/mediatek/mtk_drm_gem.h @@ -37,6 +37,7 @@ struct mtk_drm_gem_obj { dma_addr_t dma_addr; unsigned long dma_attrs; struct sg_table *sg; + struct page **pages; }; #define to_mtk_gem_obj(x) container_of(x, struct mtk_drm_gem_obj, base) @@ -52,5 +53,7 @@ int mtk_drm_gem_mmap_buf(struct drm_gem_object *obj, struct sg_table *mtk_gem_prime_get_sg_table(struct drm_gem_object *obj); struct drm_gem_object *mtk_gem_prime_import_sg_table(struct drm_device *dev, struct dma_buf_attachment *attach, struct sg_table *sg); +void *mtk_drm_gem_prime_vmap(struct drm_gem_object *obj); +void mtk_drm_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr); #endif