From nobody Thu Nov 14 06:58:06 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 1705064814870764.2863903699647; Fri, 12 Jan 2024 05:06:54 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rOHDn-00064h-Ig; Fri, 12 Jan 2024 08:05:15 -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 1rOHDC-0004ZG-UA for qemu-devel@nongnu.org; Fri, 12 Jan 2024 08:04:46 -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 1rOHD5-0003A4-Ei for qemu-devel@nongnu.org; Fri, 12 Jan 2024 08:04:37 -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 1rOH62-0008jM-La; Fri, 12 Jan 2024 12:57:14 +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=e5P4kUId6IlggOfevBgblAkFTfABYMw7RWbRatrL8t8=; b=pnGBRTjPYv5HRnmiBSOqZy3eB8 px2deWlPssO5TG9YqQQ2TwcYELmNEgHrjbHF+9Z3RxdfM8OnGKKsAgr+adwOaw3TNqAvM6xZs7L6f 9Dys+i4uJWDjU6KVjPlQO0kqBLt7SRijGkf8qoCfeMzaToxGcBlLbxUmxhGOx5TUXMaCBcrai/gf7 u6qMy66+o3CyVgtzGnZCeyaw5nZQLuCvfJKWkFJ5k5zvVVcVNzsxmvQXsQyW3VNVivG3lUr2PK4K0 D1nghVycAWT8tPFh/wunkI1KYEr3hbLKhF159LJG89Fu4sFhqkZfLiFP7xMFHNr3pyvyQ1NsYlw9Q GVOPM55oPGLRpLl/xqikFYgyokjt2w8B8LnexCZNRo7AKvCGnoxd9Vl1CjhApy5MY4Ny/NUevlHBo DxaMY6A8EhnNpvaq8u+d6Jr+TlYF549BIvuQaJk5FOoqDK8staowD/hhHH40kMBcZDccHVAX56q93 JVFLiZilS3b5z2BZYsmTePZUPuleHXUEzt4Kxk6P0QtpxxgHhVs67j4jryNsteK5eDYLIoOywEz90 pjyE9onb+VYZmiw1kfp7m7WKTzXvbwKKVeiBm+OQpxH5EMcmd5FVBLrKEkIt6ky8/SXQkvZPjffm9 ee7PWVO7LzUKj1dljpShBwswOsRfWezy5sK5e4LRU=; 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 12:53:52 +0000 Message-Id: <20240112125420.514425-61-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 60/88] esp.c: use deferred interrupts for both DATA IN and DATA OUT phases 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: 1705064816046100001 Content-Type: text/plain; charset="utf-8" This brings DATA OUT transfers in line with DATA IN transfers by ensuring t= hat the guest visible function complete interrupt is only set once the SCSI lay= er has returned. Signed-off-by: Mark Cave-Ayland --- hw/scsi/esp.c | 35 ++++++++++++++++++----------------- 1 file changed, 18 insertions(+), 17 deletions(-) diff --git a/hw/scsi/esp.c b/hw/scsi/esp.c index b6cf1b43db..d71465718c 100644 --- a/hw/scsi/esp.c +++ b/hw/scsi/esp.c @@ -248,10 +248,8 @@ static int esp_select(ESPState *s) =20 /* * Note that we deliberately don't raise the IRQ here: this will be do= ne - * either in do_command_phase() for DATA OUT transfers or by the defer= red - * IRQ mechanism in esp_transfer_data() for DATA IN transfers + * either in esp_transfer_data() or esp_command_complete() */ - s->rregs[ESP_RINTR] |=3D INTR_FC; s->rregs[ESP_RSEQ] =3D SEQ_CD; return 0; } @@ -321,20 +319,17 @@ static void do_command_phase(ESPState *s) datalen =3D scsi_req_enqueue(s->current_req); s->ti_size =3D datalen; fifo8_reset(&s->cmdfifo); + s->data_ready =3D false; if (datalen !=3D 0) { s->ti_cmd =3D 0; + /* + * Switch to DATA phase but wait until initial data xfer is + * complete before raising the command completion interrupt + */ if (datalen > 0) { - /* - * Switch to DATA IN phase but wait until initial data xfer is - * complete before raising the command completion interrupt - */ - s->data_ready =3D false; esp_set_phase(s, STAT_DI); } else { esp_set_phase(s, STAT_DO); - s->rregs[ESP_RINTR] |=3D INTR_BS | INTR_FC; - esp_raise_irq(s); - esp_lower_drq(s); } scsi_req_continue(s->current_req); return; @@ -832,9 +827,9 @@ void esp_command_complete(SCSIRequest *req, size_t resi= d) case CMD_SELATN: /* * No data phase for sequencer command so raise deferred bus servi= ce - * interrupt + * and function complete interrupt */ - s->rregs[ESP_RINTR] |=3D INTR_BS; + s->rregs[ESP_RINTR] |=3D INTR_BS | INTR_FC; break; } =20 @@ -854,14 +849,13 @@ void esp_command_complete(SCSIRequest *req, size_t re= sid) void esp_transfer_data(SCSIRequest *req, uint32_t len) { ESPState *s =3D req->hba_private; - int to_device =3D (esp_get_phase(s) =3D=3D STAT_DO); uint32_t dmalen =3D esp_get_tc(s); =20 trace_esp_transfer_data(dmalen, s->ti_size); s->async_len =3D len; s->async_buf =3D scsi_req_get_buf(req); =20 - if (!to_device && !s->data_ready) { + if (!s->data_ready) { s->data_ready =3D true; =20 switch (s->rregs[ESP_CMD]) { @@ -869,6 +863,13 @@ void esp_transfer_data(SCSIRequest *req, uint32_t len) case CMD_SEL: case CMD_SELATN | CMD_DMA: case CMD_SELATN: + /* + * Initial incoming data xfer is complete for sequencer command + * so raise deferred bus service and function complete interru= pt + */ + s->rregs[ESP_RINTR] |=3D INTR_BS | INTR_FC; + break; + case CMD_SELATNS | CMD_DMA: case CMD_SELATNS: /* @@ -876,7 +877,6 @@ void esp_transfer_data(SCSIRequest *req, uint32_t len) * completion interrupt */ s->rregs[ESP_RINTR] |=3D INTR_BS; - esp_raise_irq(s); break; =20 case CMD_TI | CMD_DMA: @@ -886,9 +886,10 @@ void esp_transfer_data(SCSIRequest *req, uint32_t len) * DATA phase */ s->rregs[ESP_RINTR] |=3D INTR_BS; - esp_raise_irq(s); break; } + + esp_raise_irq(s); } =20 /* --=20 2.39.2