From patchwork Fri Dec 20 04:17:46 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Finn Thain X-Patchwork-Id: 11304785 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 56D3D14E3 for ; Fri, 20 Dec 2019 04:27:36 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 3777921D7D for ; Fri, 20 Dec 2019 04:27:36 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3777921D7D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=telegraphics.com.au Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:50578 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ii9t0-0000i3-R4 for patchwork-qemu-devel@patchwork.kernel.org; Thu, 19 Dec 2019 23:27:34 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:59723) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ii9o0-0000b8-Gh for qemu-devel@nongnu.org; Thu, 19 Dec 2019 23:22:25 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ii9nz-0003Oi-DT for qemu-devel@nongnu.org; Thu, 19 Dec 2019 23:22:24 -0500 Received: from kvm5.telegraphics.com.au ([98.124.60.144]:34446) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ii9nz-00020J-8I; Thu, 19 Dec 2019 23:22:23 -0500 Received: by kvm5.telegraphics.com.au (Postfix, from userid 502) id D5C2C28D4F; Thu, 19 Dec 2019 23:22:02 -0500 (EST) To: Jason Wang , qemu-devel@nongnu.org Message-Id: In-Reply-To: References: From: Finn Thain Subject: [PATCH v2 11/13] dp8393x: Clear descriptor in_use field when necessary Date: Fri, 20 Dec 2019 15:17:46 +1100 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [fuzzy] X-Received-From: 98.124.60.144 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Aleksandar Rikalo , =?utf-8?q?Herv=C3=A9_Po?= =?utf-8?q?ussineau?= , Laurent Vivier , qemu-stable@nongnu.org Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" This is in accordance with section 3.4.7 of the datasheet: When the system appends more descriptors, the SONIC releases ownership of the descriptor after writing 0000h to the RXpkt.in_use field. Signed-off-by: Finn Thain --- hw/net/dp8393x.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/hw/net/dp8393x.c b/hw/net/dp8393x.c index f35b8b48aa..6b69cca329 100644 --- a/hw/net/dp8393x.c +++ b/hw/net/dp8393x.c @@ -806,6 +806,15 @@ static ssize_t dp8393x_receive(NetClientState *nc, const uint8_t * buf, return -1; } /* Link has been updated by host */ + + /* Clear in_use */ + size = sizeof(uint16_t) * width; + address = dp8393x_crda(s) + sizeof(uint16_t) * 6 * width; + dp8393x_put(s, width, 0, 0); + address_space_rw(&s->as, address, MEMTXATTRS_UNSPECIFIED, + (uint8_t *)s->data, size, 1); + + /* Move to next descriptor */ s->regs[SONIC_CRDA] = s->regs[SONIC_LLFA]; }