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Fri, 25 Sep 2020 14:12:33 +0000 (GMT) From: Marek Szyprowski To: Linux IOMMU , linux-media@vger.kernel.org, linux-samsung-soc@vger.kernel.org Cc: Marek Szyprowski , Robin Murphy , Joerg Roedel , Christoph Hellwig , Sylwester Nawrocki , Krzysztof Kozlowski , Bartlomiej Zolnierkiewicz , Tomasz Figa , linux-kernel@vger.kernel.org Subject: [PATCH 7/8] media: platform: exynos4-is: use DMA_ATTR_LOW_ADDRESS Date: Fri, 25 Sep 2020 16:12:17 +0200 Message-Id: <20200925141218.13550-8-m.szyprowski@samsung.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200925141218.13550-1-m.szyprowski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrMKsWRmVeSWpSXmKPExsWy7djP87qXfuXGG+y+Y2yxccZ6VouVq48y WSzYb23ROXsDu8X580Di8q45bBY9G7ayWsw4v4/JYu2Ru+wWBz88YbVof/qS2eJz6z82Bx6P JwfnMXmsmbeG0WN2w0UWj02rOtk8Jt9Yzuix+2YDm0ffllWMHp83yQVwRHHZpKTmZJalFunb JXBl3Ll0ja3gFWfFrO1bmBsYZ3F0MXJySAiYSKzp2MTYxcjFISSwglHi95EbzBDOF0aJ9d9P QDmfGSWeLt3JDNPS+fMaO0RiOaPEzI1nGeFaXn/byghSxSZgKNH1touti5GDQ0SgRGLZCT6Q GmaBJ0wSe/4uZAKpERbwkvj2ZA0LiM0ioCqx/sRTNhCbV8BWYvb9iVDb5CVWbzgAZnMK2Ek8 vHgAbJmEwCp2iYYH09lBFkgIuEhc2RUIUS8s8er4FnYIW0bi9OQeFoj6ZkaJh+fWskM4PYwS l5tmMEJUWUvcOfcL7FJmAU2J9bv0IcKOEpdPXoKazydx460gSJgZyJy0bTozRJhXoqNNCKJa TWLW8XVwaw9euAR1vofE444TbJDwmcgocWH5RpYJjPKzEJYtYGRcxSieWlqcm55abJSXWq5X nJhbXJqXrpecn7uJEZh0Tv87/mUH464/SYcYBTgYlXh4FZ7mxguxJpYVV+YeYpTgYFYS4XU6 ezpOiDclsbIqtSg/vqg0J7X4EKM0B4uSOK/xopexQgLpiSWp2ampBalFMFkmDk6pBsa5sVHO Pwrsjrj8vRe94OOhsIub8iRTLsUsslKwbt81NVXnZKscZ83/4+vnLl/8fcrilAX8TF5rTrZq 7unNu/hO8/BR7XXaM5aaero/d+Yy5v05zbZ2d26B4tx7vls/n9GfynEt0fujYYJWWOeDpppz n6t3hO/xSZr0Tf7Wx0ePt27K/qORvGe+EktxRqKhFnNRcSIAyQ4cADYDAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFmphkeLIzCtJLcpLzFFi42I5/e/4Xd1Lv3LjDXZfkbfYOGM9q8XK1UeZ LBbst7bonL2B3eL8eSBxedccNoueDVtZLWac38dksfbIXXaLgx+esFq0P33JbPG59R+bA4/H k4PzmDzWzFvD6DG74SKLx6ZVnWwek28sZ/TYfbOBzaNvyypGj8+b5AI4ovRsivJLS1IVMvKL S2yVog0tjPQMLS30jEws9QyNzWOtjEyV9O1sUlJzMstSi/TtEvQy7ly6xlbwirNi1vYtzA2M szi6GDk5JARMJDp/XmPvYuTiEBJYyijxrG0aM0RCRuLktAZWCFtY4s+1LjaIok+MEpsnbWYH SbAJGEp0vQVJcHKICJRJdFzZygxSxCzwhkni7qsfYEXCAl4S356sYQGxWQRUJdafeArWwCtg KzH7/kSobfISqzccALM5BewkHl48wNjFyAG0zVZi/0OnCYx8CxgZVjGKpJYW56bnFhvpFSfm Fpfmpesl5+duYgTGwLZjP7fsYOx6F3yIUYCDUYmHV+FpbrwQa2JZcWXuIUYJDmYlEV6ns6fj hHhTEiurUovy44tKc1KLDzGaAt00kVlKNDkfGJ95JfGGpobmFpaG5sbmxmYWSuK8HQIHY4QE 0hNLUrNTUwtSi2D6mDg4pRoYd//1tj5fwVt/puPJkz9F6vv+3lj38k/HTxvXZB6XOSq9/Apl j3J0X+6QUKpu/vJP9efphzs+Hbw5O83haFbYZZ96p+oZjZs/q2iX3p3ar7/rR66wQ9kbs7kn RQrD9mvMUhLUOVx/w7FGKWLKGfFA9yRjMTsbJ6Fvk0Q0313Ju5pwZIpQttIcJZbijERDLeai 4kQAELzNQ5cCAAA= X-CMS-MailID: 20200925141234eucas1p2876321230b7f0910242e0e28b3a8388b X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-RootMTR: 20200925141234eucas1p2876321230b7f0910242e0e28b3a8388b X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20200925141234eucas1p2876321230b7f0910242e0e28b3a8388b References: <20200925141218.13550-1-m.szyprowski@samsung.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Exynos4-IS driver relied on the way the ARM DMA-IOMMU glue code worked - mainly it relied on the fact that the allocator used first-fit algorithm and the first allocated buffer were at 0x0 DMA/IOVA address. This is not true for the generic IOMMU-DMA glue code that will be used for ARM architecture soon, so add the needed DMA attribute to force such behavior of the DMA-mapping code. Signed-off-by: Marek Szyprowski --- drivers/media/platform/exynos4-is/fimc-is.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/media/platform/exynos4-is/fimc-is.c b/drivers/media/platform/exynos4-is/fimc-is.c index 41b841a96338..9d3556eae5d3 100644 --- a/drivers/media/platform/exynos4-is/fimc-is.c +++ b/drivers/media/platform/exynos4-is/fimc-is.c @@ -335,8 +335,9 @@ static int fimc_is_alloc_cpu_memory(struct fimc_is *is) { struct device *dev = &is->pdev->dev; - is->memory.vaddr = dma_alloc_coherent(dev, FIMC_IS_CPU_MEM_SIZE, - &is->memory.addr, GFP_KERNEL); + is->memory.vaddr = dma_alloc_attrs(dev, FIMC_IS_CPU_MEM_SIZE, + &is->memory.addr, GFP_KERNEL, + DMA_ATTR_LOW_ADDRESS); if (is->memory.vaddr == NULL) return -ENOMEM; -- 2.17.1