From mboxrd@z Thu Jan 1 00:00:00 1970 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 31DB31A00D2; Thu, 15 Aug 2024 13:45:26 +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=1723729526; cv=none; b=DEXxky9sQCv5ltVb07rOCMnqhDERoGDTqwF1qOKEw75aQiIBmfwZkfbSTfDmxpSHXbHN685kar0F/CIqtiHAJw7XIke/gjskjVDXZpPRX+naOEgPVCCRYqQYJoa/xkLvmGONXmLvruAc1Do0Fqjv1/kdEu+rUOTJws05Wr5IdI8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723729526; c=relaxed/simple; bh=iIRd+uNiOFLxnuHrrYfeeG3YB4B62uNF8rzsqrR+mbo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=P3bJrbu8bT3JnBhV7XHVkOrKRj3rG/WauON26kyM1yU0VpDYBliQfO82xDo3/ddlB1UpwKSyrzpCPxRvfuQeqV+cRC1JjZ6yWoXgAjw1wb3JDkbIOrDau69792W4WtKP9CCvpAV2iE0+fjo0ytMkjWSXnjAZ+Zz4PDCbgmaqWOo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=cNDRsgiJ; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="cNDRsgiJ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A5B08C32786; Thu, 15 Aug 2024 13:45:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1723729526; bh=iIRd+uNiOFLxnuHrrYfeeG3YB4B62uNF8rzsqrR+mbo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=cNDRsgiJQyAav8lgm9YMtfiiroO8WG/6Ko8VwqYxii+x4dj9rozC8L6CXJ0D+5hSD +gCcrV3NcO5EZAjI8KJsZYtVVLQ2WthLBllW/HOOFBya1yvkpKHWOPJmZi7RK7937X t8AzAUUn9fLL9hQNWx13M9wiqB8dN2+a1377Pj+k= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Chiara Meiohas , Michael Guralnik , Leon Romanovsky , Sasha Levin Subject: [PATCH 5.15 124/484] RDMA/mlx5: Set mkeys for dmabuf at PAGE_SIZE Date: Thu, 15 Aug 2024 15:19:42 +0200 Message-ID: <20240815131946.084351074@linuxfoundation.org> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20240815131941.255804951@linuxfoundation.org> References: <20240815131941.255804951@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Chiara Meiohas [ Upstream commit a4e540119be565f47c305f295ed43f8e0bc3f5c3 ] Set the mkey for dmabuf at PAGE_SIZE to support any SGL after a move operation. ib_umem_find_best_pgsz returns 0 on error, so it is incorrect to check the returned page_size against PAGE_SIZE Fixes: 90da7dc8206a ("RDMA/mlx5: Support dma-buf based userspace memory region") Signed-off-by: Chiara Meiohas Reviewed-by: Michael Guralnik Link: https://lore.kernel.org/r/1e2289b9133e89f273a4e68d459057d032cbc2ce.1718301631.git.leon@kernel.org Signed-off-by: Leon Romanovsky Signed-off-by: Sasha Levin --- drivers/infiniband/hw/mlx5/mlx5_ib.h | 13 +++++++++++++ drivers/infiniband/hw/mlx5/odp.c | 6 ++---- 2 files changed, 15 insertions(+), 4 deletions(-) diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h b/drivers/infiniband/hw/mlx5/mlx5_ib.h index bf20a388eabe1..08c59c5a1e108 100644 --- a/drivers/infiniband/hw/mlx5/mlx5_ib.h +++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h @@ -109,6 +109,19 @@ unsigned long __mlx5_umem_find_best_quantized_pgoff( __mlx5_bit_sz(typ, page_offset_fld), 0, scale, \ page_offset_quantized) +static inline unsigned long +mlx5_umem_dmabuf_find_best_pgsz(struct ib_umem_dmabuf *umem_dmabuf) +{ + /* + * mkeys used for dmabuf are fixed at PAGE_SIZE because we must be able + * to hold any sgl after a move operation. Ideally the mkc page size + * could be changed at runtime to be optimal, but right now the driver + * cannot do that. + */ + return ib_umem_find_best_pgsz(&umem_dmabuf->umem, PAGE_SIZE, + umem_dmabuf->umem.iova); +} + enum { MLX5_IB_MMAP_OFFSET_START = 9, MLX5_IB_MMAP_OFFSET_END = 255, diff --git a/drivers/infiniband/hw/mlx5/odp.c b/drivers/infiniband/hw/mlx5/odp.c index fcf6447b4a4e0..66e53e895d341 100644 --- a/drivers/infiniband/hw/mlx5/odp.c +++ b/drivers/infiniband/hw/mlx5/odp.c @@ -704,10 +704,8 @@ static int pagefault_dmabuf_mr(struct mlx5_ib_mr *mr, size_t bcnt, return err; } - page_size = mlx5_umem_find_best_pgsz(&umem_dmabuf->umem, mkc, - log_page_size, 0, - umem_dmabuf->umem.iova); - if (unlikely(page_size < PAGE_SIZE)) { + page_size = mlx5_umem_dmabuf_find_best_pgsz(umem_dmabuf); + if (!page_size) { ib_umem_dmabuf_unmap_pages(umem_dmabuf); err = -EINVAL; } else { -- 2.43.0