From nobody Sat Sep 21 08:46:11 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 17050655636151016.9109964512954; Fri, 12 Jan 2024 05:19:23 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rOHAs-00046w-4v; Fri, 12 Jan 2024 08:02:17 -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 1rOH9Y-0002KI-2i for qemu-devel@nongnu.org; Fri, 12 Jan 2024 08:00:52 -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 1rOH9W-0001Ns-7q for qemu-devel@nongnu.org; Fri, 12 Jan 2024 08:00:51 -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 1rOH6n-0008jM-1e; Fri, 12 Jan 2024 12:58:05 +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=x156p7wfBoslhd+bnv42ZW1jfmF4Zc961WxQ1y+2R9s=; b=NiYPx/ZVHUCVgmR0t4fnxIfOdK piZXHjOcG7F4PfpQg98X2/cvW1uZHuhb/6GJ0MpKSaZ14N41PHZxP1O2XXNadeFA87rn1SNb6tLUo OOeFAXpTOai158F0vHukP2k5iHEmk+4t7H9/dz1zprP+iVtDdIXNzvq8r/WGJSUV7TZXFdsbcz0XP uvBkHuU3u9YsJATeFeaWTwfGiQJ1dv43E3j3IfiQ0/N4B0fEEUHzPzGSLao2tdI4NlzHWQEpI6e11 g120NduFNS3bDCvzc/iYgVZy9QF5pFpfFjFog5H6vc3W0+rp2uspKC5LtZl+tNd4b205j32KGiqIw plg+sOkazPTfVaFk0fiPgc7Nh9gnYe3aIdOQJuw0EhaqbC7VODyUZZOUBbSrELg6NS6dUIkABmypz HiFoVY3/rnEiYKHWVsbppLwInXP3FHJxFczAjyNmrtQjVrYTWtIxlUjQs0Y0mwq71XEq6U9IwJIo5 kNZtWGJT6aRNTcjf070Upz0hKnjP+T/o61Ipy3Tn0+kpMKI3unp/RE4GUr5YDMwG55KNQ7MsMILU6 te5pSwGfgoOhfZhNQ1ohjC545zEDlxeDAdlASnSj+T614nQmXk4VDxhJh16KyIuwT/HHKDKQaJ/JV iJUppYaRm6xRu1POS2y6Wsd+bLBiei6k6kBkdZchk=; 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 12:54:08 +0000 Message-Id: <20240112125420.514425-77-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 76/88] esp.c: only transfer non-DMA COMMAND phase data for specific commands 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: 1705065565678100012 Content-Type: text/plain; charset="utf-8" The contents of the FIFO should only be copied to cmdfifo for ESP commands = that are sending data to the SCSI bus, which are the SEL_* commands and the TI command. Otherwise any incoming data should be held in the FIFO as normal. This fixes booting of really old 32-bit SPARC Linux kernels such as Aurelie= n's debian_etch_sparc_small.qcow2 test image. Signed-off-by: Mark Cave-Ayland --- hw/scsi/esp.c | 21 +++++++++++++++------ 1 file changed, 15 insertions(+), 6 deletions(-) diff --git a/hw/scsi/esp.c b/hw/scsi/esp.c index ca26415d5f..17e2db442c 100644 --- a/hw/scsi/esp.c +++ b/hw/scsi/esp.c @@ -757,13 +757,13 @@ static void esp_do_nodma(ESPState *s) break; =20 case STAT_CD: - /* Copy FIFO into cmdfifo */ - n =3D esp_fifo_pop_buf(&s->fifo, buf, fifo8_num_used(&s->fifo)); - n =3D MIN(fifo8_num_free(&s->cmdfifo), n); - fifo8_push_all(&s->cmdfifo, buf, n); - switch (s->rregs[ESP_CMD]) { case CMD_TI: + /* Copy FIFO into cmdfifo */ + n =3D esp_fifo_pop_buf(&s->fifo, buf, fifo8_num_used(&s->fifo)= ); + n =3D MIN(fifo8_num_free(&s->cmdfifo), n); + fifo8_push_all(&s->cmdfifo, buf, n); + cmdlen =3D fifo8_num_used(&s->cmdfifo); trace_esp_handle_ti_cmd(cmdlen); =20 @@ -788,6 +788,11 @@ static void esp_do_nodma(ESPState *s) =20 case CMD_SEL | CMD_DMA: case CMD_SELATN | CMD_DMA: + /* Copy FIFO into cmdfifo */ + n =3D esp_fifo_pop_buf(&s->fifo, buf, fifo8_num_used(&s->fifo)= ); + n =3D MIN(fifo8_num_free(&s->cmdfifo), n); + fifo8_push_all(&s->cmdfifo, buf, n); + /* Handle when DMA transfer is terminated by non-DMA FIFO writ= e */ if (esp_cdb_length(s) && esp_cdb_length(s) =3D=3D fifo8_num_used(&s->cmdfifo) - s->cmdfifo_cdb_offset) { @@ -798,7 +803,11 @@ static void esp_do_nodma(ESPState *s) =20 case CMD_SEL: case CMD_SELATN: - /* FIFO already contain entire CDB */ + /* FIFO already contain entire CDB: copy to cmdfifo and execut= e */ + n =3D esp_fifo_pop_buf(&s->fifo, buf, fifo8_num_used(&s->fifo)= ); + n =3D MIN(fifo8_num_free(&s->cmdfifo), n); + fifo8_push_all(&s->cmdfifo, buf, n); + do_cmd(s); break; } --=20 2.39.2