From nobody Sat Sep 21 07:45:55 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 1705065552204867.2861085693563; Fri, 12 Jan 2024 05:19:12 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rOHOe-0004zv-E9; Fri, 12 Jan 2024 08:16:28 -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 1rOHOF-0004VW-RI for qemu-devel@nongnu.org; Fri, 12 Jan 2024 08:16:05 -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 1rOHOE-00006I-29 for qemu-devel@nongnu.org; Fri, 12 Jan 2024 08:16:03 -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 1rOHNL-0009Gy-3i; Fri, 12 Jan 2024 13:15:08 +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=FRkn+/5vqEfPb5/vhvhcQRjljumahQtc+h05lqCfuTU=; b=hNuxj+2zbcqSho1v7eVZE9JV/t CGWUgKwcMdlLV7m8ICJkzZMNXQWPp6PJj2KAxF1I87ZuO73f5xfs06D3KSEFHRG7Ht7QfxIm4wZZT XV7qhz4yIVEkTyhIoirQqjgUCNoKwULr2tJC3NeWEH0bRRtyMzBTPfvasP7ghRScqRcfKXEqvO6IM iYjFqw7wMpGForvUcnWr53tLUoelPW3bN1cohfUJ9j3noCTZ4gBsSa43nNcsYWk5aulU2amP2laBi XNso3EaT+F0H5GYZCZnXoJ8jz07FdNYN9+byulYvBxJ7Lpqzwgr7lobfRdVm3/goysqaySSwxNaiv 3MqyJ63HtXp907VnlKz49MI0nqqBByLHGIqBC/gLaFyLskPlbalmv30C9lOsbxd+5fYtY6K7orpDs tzWKJq2Ag5dRLSjeK9M+HVPietuFu72KMD65K4kfX7CWQSH72OyVVubowrLVRO5x353oOxn21hxNv RxvsRVHhF3SVrfj+kkJFlRuNZiUwDXgQsG5+R2JOVk/RjPKx+YZrAQiJR6+N8miKa+x1UiWoVkvr8 rKjdeEswb+heefOgc2nNd7z5AmtnVdKJYI1gb46YaijjKdihMrkGxQLGw+6RjAihRZvBzkgORSOJE 5auBT5swekYD6OkmUNTiWNEN2U3vVmEldLdcOyMyo=; From: Mark Cave-Ayland To: pbonzini@redhat.com, fam@euphon.net, hpoussin@reactos.org, deller@gmx.de, linux@roeck-us.net, qemu-devel@nongnu.org Date: Fri, 12 Jan 2024 13:15:26 +0000 Message-Id: <20240112131529.515642-2-mark.cave-ayland@ilande.co.uk> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240112131529.515642-1-mark.cave-ayland@ilande.co.uk> References: <20240112131529.515642-1-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 1/4] esp-pci.c: use correct address register for PCI DMA transfers 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: 1705065553636100005 Content-Type: text/plain; charset="utf-8" The current code in esp_pci_dma_memory_rw() sets the DMA address to the val= ue of the DMA_SPA (Starting Physical Address) register which is incorrect: this means that for each callback from the SCSI layer the DMA address is set back to the starting address. In the case where only a single SCSI callback occurs (currently for transfer lengths < 128kB) this works fine, however for larger transfers the DMA addr= ess wraps back to the initial starting address, corrupting the buffer holding t= he data transferred to the guest. Fix esp_pci_dma_memory_rw() to use the DMA_WAC (Working Address Counter) for the DMA address which is correctly incremented across multiple SCSI layer transfers. Signed-off-by: Mark Cave-Ayland Reviewed-by: Guenter Roeck Tested-by: Guenter Roeck --- hw/scsi/esp-pci.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/hw/scsi/esp-pci.c b/hw/scsi/esp-pci.c index 93b3429e0f..7117725371 100644 --- a/hw/scsi/esp-pci.c +++ b/hw/scsi/esp-pci.c @@ -275,7 +275,7 @@ static void esp_pci_dma_memory_rw(PCIESPState *pci, uin= t8_t *buf, int len, qemu_log_mask(LOG_UNIMP, "am53c974: MDL transfer not implemented\n= "); } =20 - addr =3D pci->dma_regs[DMA_SPA]; + addr =3D pci->dma_regs[DMA_WAC]; if (pci->dma_regs[DMA_WBC] < len) { len =3D pci->dma_regs[DMA_WBC]; } --=20 2.39.2