From patchwork Thu Sep 12 11:15:39 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Leon Romanovsky X-Patchwork-Id: 13801980 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 845F01A38F0; Thu, 12 Sep 2024 11:16:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726139776; cv=none; b=dVkyfUHAEl0urBaETLSBRQIKrw2rsq0nQrVe8hiuSkZ92WdVkWvSiYvXY8hMV4pqCc2RAKKnmlNcEPFySjLSoNoUIC/KWDh/9RrntE0IXusCfjlexux3ERHew5yKuvKalKG0jMjUU685J/4DudtAz591bGIPvYlqk9+1StJT0M4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726139776; c=relaxed/simple; bh=wOAE2cOF8fAnldbeI2zuqZ+UOONgwZZm16iJWxrv2PE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ofkoh+z3YaCBqn726agZjHTSuc3mhdUljK85yAcIRsWzlD/FixZMHPVfiUUvK0zsA/N8Q0s6w6qC43Hv8X0yblKiuZxYz3gqpwBg7Y0yDAHLLdGRa8l/2rBNkpTTEfqdUd1GkSe9TuUfJlW2VckIPgstp/ttWo6o24RQIbQwAcM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=oqy5RZrK; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="oqy5RZrK" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4577FC4CECE; Thu, 12 Sep 2024 11:16:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1726139776; bh=wOAE2cOF8fAnldbeI2zuqZ+UOONgwZZm16iJWxrv2PE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=oqy5RZrK9GLnKls1wNDOUPi+7NtU2JS4w8JdmoFHMUazCDp35ubbfNk+eD2Ky3+kD c9dh8XOv6xn8eUdWkXYq/ky1ASXhJwYbPSmlWO7OggXZokzWbb0xc++iuMk1NnstOZ 9G+LadC3Vfaio8VU/li3IVUb1dbRspKdNLjwGfwSKTIlBcbij2YVopnafSpz+igh2w 8q3vtsyRvLIliApnPdT+nobPr5chNkY+1N1mtTKAQdsI0f3f4yiiv78QQi0zQHlzvS 4okcMEZtIu1uoplQgT2/NieLqCfTUhXBYZSEndngVTH5rsuHS4qYvHNtl2e/+MdkFi 0ds6D1OQO+Iuw== From: Leon Romanovsky To: Jens Axboe , Jason Gunthorpe , Robin Murphy , Joerg Roedel , Will Deacon , Keith Busch , Christoph Hellwig , "Zeng, Oak" , Chaitanya Kulkarni Cc: Leon Romanovsky , Sagi Grimberg , Bjorn Helgaas , Logan Gunthorpe , Yishai Hadas , Shameer Kolothum , Kevin Tian , Alex Williamson , Marek Szyprowski , =?utf-8?b?SsOpcsO0bWUgR2xpc3Nl?= , Andrew Morton , linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, iommu@lists.linux.dev, linux-nvme@lists.infradead.org, linux-pci@vger.kernel.org, kvm@vger.kernel.org, linux-mm@kvack.org Subject: [RFC v2 04/21] dma-mapping: initialize IOVA state struct Date: Thu, 12 Sep 2024 14:15:39 +0300 Message-ID: X-Mailer: git-send-email 2.46.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-rdma@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Leon Romanovsky Allow callers to properly initialize the IOVA state struct by providing a new function to do so. This will make sure that even users who doesn't zero their allocated memory will have a valid IOVA state struct. Signed-off-by: Leon Romanovsky --- include/linux/dma-mapping.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index f693aafe221f..285075873077 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -76,6 +76,20 @@ #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1)) +struct dma_iova_state { + struct device *dev; + enum dma_data_direction dir; +}; + +static inline void dma_init_iova_state(struct dma_iova_state *state, + struct device *dev, + enum dma_data_direction dir) +{ + memset(state, 0, sizeof(*state)); + state->dev = dev; + state->dir = dir; +} + #ifdef CONFIG_DMA_API_DEBUG void debug_dma_mapping_error(struct device *dev, dma_addr_t dma_addr); void debug_dma_map_single(struct device *dev, const void *addr,