From nobody Thu Nov 14 06:59:38 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=ilande.co.uk Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1705064188963239.2686337853471; Fri, 12 Jan 2024 04:56:28 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rOH49-0007jY-A7; Fri, 12 Jan 2024 07:55:17 -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 1rOH47-0007jC-Ld for qemu-devel@nongnu.org; Fri, 12 Jan 2024 07:55:15 -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 1rOH45-0006nO-Pe for qemu-devel@nongnu.org; Fri, 12 Jan 2024 07:55:15 -0500 Received: from [2a02:8012:c93d:0:260e:bf57:a4e9:8142] (helo=cheesecake.fritz.box) by mail.ilande.co.uk with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1rOH3R-0008jM-FW; Fri, 12 Jan 2024 12:54:37 +0000 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=dduij/1KHNbwQV3V0mAVvsaSDJf7TLad9xOYWtTXP10=; b=Vapt6Xe2zL+Z31KTreVMzM54XA rD96adoMm6S4KVsIqc0isksrG5+m+OChxltpGjO6VjA6DnxPAsA45GF8eiczBr+J8XkfA+fDorByq CSbT9Nw69ihbOEYeMe4I+JUv6OYse20twaQqXoS5aznZpiNQs8blFqznRFQ6/QD1pWaVCgWVM2MdK IT/c2BsNZ4zs/0NA6wtoNbmAbATLVvD/RoXSNKc1SU7X6y0z6sU9nA3G3XESK8AqRNTKRTVqlXu5N ueB0Wxw9sJgZuvw5iOQiXTzCV5Rp8JQnjIJvv9Bu5UbpeT6G4Lqtw8IHwk+tct5zXtXJNoUPWJhsl WzwLte30My8K++CeYGwsqRuDnaJd6SHuFNpkot5ObH70cWk/GmLw9m9317sarVWnVf9LXb9KIsdnH TfKb5sCC0cWHRkXodXFNwk45wzLdDqFbbBfR15pU6mtnm04l/st6iQnprL7tKmz41UNvI/ZATbUiy YaZXyRlxOCx1X0aliLopu9K2QSXi7rPjANEkl9AccbQkScI3r2cLM8g11oy/M74FqA/Cj2YrnSd6f wKpOVR32thkQKs5tZjiFXoQAU6LYxQ95wJZK73UhNK+IiQJMYr7fvejAMJCwfSoxLFdxVQW6QQEiW EGFcM3R485wcoj7b1N4VN3rJfLJYNj63HogVCzcAs=; From: Mark Cave-Ayland To: pbonzini@redhat.com, fam@euphon.net, hpoussin@reactos.org, laurent@vivier.eu, thuth@redhat.com, qemu-devel@nongnu.org Date: Fri, 12 Jan 2024 12:53:02 +0000 Message-Id: <20240112125420.514425-11-mark.cave-ayland@ilande.co.uk> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240112125420.514425-1-mark.cave-ayland@ilande.co.uk> References: <20240112125420.514425-1-mark.cave-ayland@ilande.co.uk> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-SA-Exim-Connect-IP: 2a02:8012:c93d:0:260e:bf57:a4e9:8142 X-SA-Exim-Mail-From: mark.cave-ayland@ilande.co.uk Subject: [PATCH 10/88] esp: move buffer and TC logic into separate to/from device paths in esp_do_dma() 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 (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1705064190725100003 Content-Type: text/plain; charset="utf-8" The ultimate aim is to for esp_do_dma() behaviour to be determined by the S= CSI bus phase, in which case it is necessary to have separate to/from device pa= ths. Signed-off-by: Mark Cave-Ayland --- hw/scsi/esp.c | 65 +++++++++++++++++++++++++++++++-------------------- 1 file changed, 40 insertions(+), 25 deletions(-) diff --git a/hw/scsi/esp.c b/hw/scsi/esp.c index 63c828c1b2..9893840255 100644 --- a/hw/scsi/esp.c +++ b/hw/scsi/esp.c @@ -678,14 +678,53 @@ static void esp_do_dma(ESPState *s) if (to_device) { if (s->dma_memory_read) { s->dma_memory_read(s->dma_opaque, s->async_buf, len); + + esp_set_tc(s, esp_get_tc(s) - len); + s->async_buf +=3D len; + s->async_len -=3D len; + s->ti_size +=3D len; + + if (s->async_len =3D=3D 0) { + scsi_req_continue(s->current_req); + /* + * If there is still data to be read from the device then + * complete the DMA operation immediately. Otherwise defer + * until the scsi layer has completed. + */ + return; + } + + /* Partially filled a scsi buffer. Complete immediately. */ + esp_dma_done(s); + esp_lower_drq(s); } else { esp_set_pdma_cb(s, DO_DMA_PDMA_CB); esp_raise_drq(s); - return; } } else { if (s->dma_memory_write) { s->dma_memory_write(s->dma_opaque, s->async_buf, len); + + esp_set_tc(s, esp_get_tc(s) - len); + s->async_buf +=3D len; + s->async_len -=3D len; + s->ti_size -=3D len; + + if (s->async_len =3D=3D 0) { + scsi_req_continue(s->current_req); + /* + * If there is still data to be read from the device then + * complete the DMA operation immediately. Otherwise defer + * until the scsi layer has completed. + */ + if (esp_get_tc(s) !=3D 0 || s->ti_size =3D=3D 0) { + return; + } + } + + /* Partially filled a scsi buffer. Complete immediately. */ + esp_dma_done(s); + esp_lower_drq(s); } else { /* Adjust TC for any leftover data in the FIFO */ if (!fifo8_is_empty(&s->fifo)) { @@ -713,32 +752,8 @@ static void esp_do_dma(ESPState *s) esp_set_tc(s, esp_get_tc(s) - len); esp_set_pdma_cb(s, DO_DMA_PDMA_CB); esp_raise_drq(s); - return; } } - esp_set_tc(s, esp_get_tc(s) - len); - s->async_buf +=3D len; - s->async_len -=3D len; - if (to_device) { - s->ti_size +=3D len; - } else { - s->ti_size -=3D len; - } - if (s->async_len =3D=3D 0) { - scsi_req_continue(s->current_req); - /* - * If there is still data to be read from the device then - * complete the DMA operation immediately. Otherwise defer - * until the scsi layer has completed. - */ - if (to_device || esp_get_tc(s) !=3D 0 || s->ti_size =3D=3D 0) { - return; - } - } - - /* Partially filled a scsi buffer. Complete immediately. */ - esp_dma_done(s); - esp_lower_drq(s); } =20 static void esp_do_nodma(ESPState *s) --=20 2.39.2