Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753817AbaGHI0l (ORCPT ); Tue, 8 Jul 2014 04:26:41 -0400 Received: from hqemgate14.nvidia.com ([216.228.121.143]:12178 "EHLO hqemgate14.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753691AbaGHI0i (ORCPT ); Tue, 8 Jul 2014 04:26:38 -0400 X-PGP-Universal: processed; by hqnvupgp07.nvidia.com on Tue, 08 Jul 2014 01:15:54 -0700 From: Alexandre Courbot To: Ben Skeggs , David Airlie , David Herrmann , Lucas Stach , Thierry Reding , Maarten Lankhorst CC: , , , , , Alexandre Courbot Subject: [PATCH v4 2/6] drm/nouveau: map pages using DMA API on platform devices Date: Tue, 8 Jul 2014 17:25:57 +0900 Message-ID: <1404807961-30530-3-git-send-email-acourbot@nvidia.com> X-Mailer: git-send-email 2.0.0 In-Reply-To: <1404807961-30530-1-git-send-email-acourbot@nvidia.com> References: <1404807961-30530-1-git-send-email-acourbot@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org page_to_phys() is not the correct way to obtain the DMA address of a buffer on a non-PCI system. Use the DMA API functions for this, which are portable and will allow us to use other DMA API functions for buffer synchronization. Signed-off-by: Alexandre Courbot --- drivers/gpu/drm/nouveau/core/engine/device/base.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/nouveau/core/engine/device/base.c b/drivers/gpu/drm/nouveau/core/engine/device/base.c index 18c8c7245b73..e4e9e64988fe 100644 --- a/drivers/gpu/drm/nouveau/core/engine/device/base.c +++ b/drivers/gpu/drm/nouveau/core/engine/device/base.c @@ -489,7 +489,10 @@ nv_device_map_page(struct nouveau_device *device, struct page *page) if (pci_dma_mapping_error(device->pdev, ret)) ret = 0; } else { - ret = page_to_phys(page); + ret = dma_map_page(&device->platformdev->dev, page, 0, + PAGE_SIZE, DMA_BIDIRECTIONAL); + if (dma_mapping_error(&device->platformdev->dev, ret)) + ret = 0; } return ret; @@ -501,6 +504,9 @@ nv_device_unmap_page(struct nouveau_device *device, dma_addr_t addr) if (nv_device_is_pci(device)) pci_unmap_page(device->pdev, addr, PAGE_SIZE, PCI_DMA_BIDIRECTIONAL); + else + dma_unmap_page(&device->platformdev->dev, addr, + PAGE_SIZE, DMA_BIDIRECTIONAL); } int -- 2.0.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/