From patchwork Tue Feb 13 19:39:46 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Cave-Ayland X-Patchwork-Id: 13555582 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 14DE4C4829A for ; Tue, 13 Feb 2024 19:46:15 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rZyfs-00058C-8t; Tue, 13 Feb 2024 14:42:36 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rZyfp-0004wS-Vt for qemu-devel@nongnu.org; Tue, 13 Feb 2024 14:42:34 -0500 Received: from mail.ilande.co.uk ([2001:41c9:1:41f::167]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rZyfo-0006Nx-Fj for qemu-devel@nongnu.org; Tue, 13 Feb 2024 14:42:33 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=ilande.co.uk; s=20220518; h=Subject:Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:To:From:Sender:Reply-To:Cc: Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=dF+0iXt3A2oU6ZpqfQ69+kz5PzEX70MTcPwj4fQaWo0=; b=aL52GBRBwrXOfwjkFzZMOOmmmX wugRlMJYY7/j5/Xo+YaRnE0QRCtJD0bNLXlvgglAT3QPzLspjXGYyoWLde82sMNNmYlYckdNGJd9z BZke1fuuj4YR7lsNC4TOGMn4PtxqwFrYX1PLSPa48fus7zfR1g9pnD40bBNQOgTTfoKVdqbkePl6j Si4jmKVx3PQWJ+L6tpSaqPLA8TqaNpgcQn2ZslHlHm6CJRO++whzBasDrzXERq9AQ5KaJqc7llkFp xAJ9Xb4j1lMTE2CY0/PJ080xx+J1t+saFqnzd+bO5rEQH3wy3EJJS8nkdPMnkff1WpieMpFBeMdpb MKfI5HkQpVMw3Lr9jUXRicfmYErCpQ8+WKu2/YFAPQUrmiZHtfxMvSHqNNkNFdgt+EjCH8xXnCxlD ag2A2XGYrnqF9MaRXyP2HZi3MmqVRsI61JSrmnM8v3oT/Qv+DS9KyySyaCRAbJK+VH9jHdVKH0pA0 r/Zb8ICufNt/zw0Ay3nzv4l9owsJWRbhpXZGDGt7ePYumK8bOHG1eJD3kqXZ3IcAHWuASgdozgiQP ykDb4WIKtohsiFEqdo7q7q2mL63GIaKyIyjrP+uER8OeUKrm+E2UDikmb1TL66A5xKu2d42eRiSfr q3UkWz0Mg1egOay67EYitoSD9435uBgSDdjESJ9BU=; Received: from [2a00:23c4:8bb2:1300:c500:f104:bc51:e670] (helo=localhost.localdomain) by mail.ilande.co.uk with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1rZyeu-0008m4-Tz; Tue, 13 Feb 2024 19:41:41 +0000 From: Mark Cave-Ayland To: peter.maydell@linaro.org, qemu-devel@nongnu.org Date: Tue, 13 Feb 2024 19:39:46 +0000 Message-Id: <20240213194052.1162753-23-mark.cave-ayland@ilande.co.uk> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240213194052.1162753-1-mark.cave-ayland@ilande.co.uk> References: <20240213194052.1162753-1-mark.cave-ayland@ilande.co.uk> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a00:23c4:8bb2:1300:c500:f104:bc51:e670 X-SA-Exim-Mail-From: mark.cave-ayland@ilande.co.uk Subject: [PULL 22/88] esp.c: ensure that the PDMA callback is called for every device read X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on mail.ilande.co.uk) Received-SPF: pass client-ip=2001:41c9:1:41f::167; envelope-from=mark.cave-ayland@ilande.co.uk; helo=mail.ilande.co.uk X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Rather than wait for the FIFO to fill up before calling the PDMA callback, push that logic directly into the from_device logic in do_dma_pdma_cb(). Signed-off-by: Mark Cave-Ayland Tested-by: Helge Deller Tested-by: Thomas Huth Message-Id: <20240112125420.514425-23-mark.cave-ayland@ilande.co.uk> Signed-off-by: Mark Cave-Ayland --- hw/scsi/esp.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/hw/scsi/esp.c b/hw/scsi/esp.c index 06be9f2e74..d80a38daa0 100644 --- a/hw/scsi/esp.c +++ b/hw/scsi/esp.c @@ -625,14 +625,14 @@ static void do_dma_pdma_cb(ESPState *s) return; } else { - if (s->async_len == 0) { + if (s->async_len == 0 && fifo8_num_used(&s->fifo) < 2) { /* Defer until the scsi layer has completed */ scsi_req_continue(s->current_req); s->data_in_ready = false; return; } - if (esp_get_tc(s) == 0) { + if (esp_get_tc(s) == 0 && fifo8_num_used(&s->fifo) < 2) { esp_lower_drq(s); esp_dma_done(s); } @@ -1419,9 +1419,7 @@ static uint64_t sysbus_esp_pdma_read(void *opaque, hwaddr addr, val = (val << 8) | esp_pdma_read(s); break; } - if (fifo8_num_used(&s->fifo) < 2) { - esp_pdma_cb(s); - } + esp_pdma_cb(s); return val; }