From nobody Tue Nov 18 10:39:17 2025 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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 ARC-Seal: i=1; a=rsa-sha256; t=1609343188; cv=none; d=zohomail.com; s=zohoarc; b=ZdECwO9FQ/RRTGrcJHy4plQLKFzR1HIfrZd2V1eYgyoEFx7A5qoaRp0c3KHvbsoSPOmXELWwgFgYAxDCiaAn0ogn5nobXel1Am+eTewZUFheS1k/E1L7HPeP4nRhSTyJ5kb0VPn58C8kB1f0LMymkrR38mXsVYcdcAtQIiHkqeU= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1609343188; h=Content-Transfer-Encoding:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=hN3MwLIP9sZ48XfmTf83N131CFPeEYi+7d42tXK9E7g=; b=e3kIN6PbfpfrZbne9ROXZq7PZ5USZYQ2ia3lG2HEyUxqTdRagvZvYrO4v+1TXrXPXfLbosscfkdz64yOngt7jyHNkHSQd44PnRf+ln6sxxnTpgHJk8cXykpjmwKoSn9Y4Q1VTR3f8LEHNEPmH4EMYN4xpzd7emyI+alkIB9BzH8= ARC-Authentication-Results: i=1; mx.zohomail.com; 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 Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1609343188901270.0040681631184; Wed, 30 Dec 2020 07:46:28 -0800 (PST) Received: from localhost ([::1]:33014 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kudgB-0001De-Ll for importer@patchew.org; Wed, 30 Dec 2020 10:46:27 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:51160) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kudZG-0001HT-P1 for qemu-devel@nongnu.org; Wed, 30 Dec 2020 10:39:20 -0500 Received: from mail.ilande.co.uk ([2001:41c9:1:41f::167]:50850 helo=mail.default.ilande.uk0.bigv.io) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kudZA-00029g-HX for qemu-devel@nongnu.org; Wed, 30 Dec 2020 10:39:16 -0500 Received: from host86-148-34-1.range86-148.btcentralplus.com ([86.148.34.1] helo=kentang.home) by mail.default.ilande.uk0.bigv.io with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1kudYz-00070L-Ad; Wed, 30 Dec 2020 15:39:06 +0000 From: Mark Cave-Ayland To: qemu-devel@nongnu.org, pbonzini@redhat.com, fam@euphon.net, laurent@vivier.eu Date: Wed, 30 Dec 2020 15:37:35 +0000 Message-Id: <20201230153745.30241-16-mark.cave-ayland@ilande.co.uk> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20201230153745.30241-1-mark.cave-ayland@ilande.co.uk> References: <20201230153745.30241-1-mark.cave-ayland@ilande.co.uk> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-SA-Exim-Connect-IP: 86.148.34.1 X-SA-Exim-Mail-From: mark.cave-ayland@ilande.co.uk Subject: [PATCH 15/25] esp: accumulate SCSI commands for PDMA transfers in cmdbuf instead of pdma_buf X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on mail.default.ilande.uk0.bigv.io) 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.default.ilande.uk0.bigv.io X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 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" Content-Type: text/plain; charset="utf-8" ESP SCSI commands are already accumulated in cmdbuf and so there is no need= to keep a separate pdma_buf buffer. Accumulate SCSI commands for PDMA transfer= s in cmdbuf instead of pdma_buf so update cmdlen accordingly and change pdma_ori= gin for PDMA transfers to CMD which allows the PDMA origin to be removed. This commit also removes a stray memcpy() from get_cmd() which is a no-op b= ecause cmdlen is always zero at the start of a command. Notionally the removal of pdma_buf from vmstate_esp_pdma also breaks migrat= ion compatibility for the PDMA subsection until its complete removal by the end= of the series. Signed-off-by: Mark Cave-Ayland --- hw/scsi/esp.c | 56 +++++++++++++++++++------------------------ include/hw/scsi/esp.h | 3 --- 2 files changed, 25 insertions(+), 34 deletions(-) diff --git a/hw/scsi/esp.c b/hw/scsi/esp.c index 2b307341ad..3bebd832aa 100644 --- a/hw/scsi/esp.c +++ b/hw/scsi/esp.c @@ -139,8 +139,6 @@ static void set_pdma(ESPState *s, enum pdma_origin_id o= rigin, static uint8_t *get_pdma_buf(ESPState *s) { switch (s->pdma_origin) { - case PDMA: - return s->pdma_buf; case TI: return s->ti_buf; case CMD: @@ -161,14 +159,12 @@ static uint8_t esp_pdma_read(ESPState *s) } =20 switch (s->pdma_origin) { - case PDMA: - val =3D s->pdma_buf[s->pdma_cur++]; - break; case TI: val =3D s->ti_buf[s->pdma_cur++]; break; case CMD: - val =3D s->cmdbuf[s->pdma_cur++]; + val =3D s->cmdbuf[s->cmdlen++]; + s->pdma_cur++; break; case ASYNC: val =3D s->async_buf[s->pdma_cur++]; @@ -193,14 +189,12 @@ static void esp_pdma_write(ESPState *s, uint8_t val) } =20 switch (s->pdma_origin) { - case PDMA: - s->pdma_buf[s->pdma_cur++] =3D val; - break; case TI: s->ti_buf[s->pdma_cur++] =3D val; break; case CMD: - s->cmdbuf[s->pdma_cur++] =3D val; + s->cmdbuf[s->cmdlen++] =3D val; + s->pdma_cur++; break; case ASYNC: s->async_buf[s->pdma_cur++] =3D val; @@ -256,8 +250,7 @@ static uint32_t get_cmd(ESPState *s, uint8_t *buf, uint= 8_t buflen) if (s->dma_memory_read) { s->dma_memory_read(s->dma_opaque, buf, dmalen); } else { - memcpy(s->pdma_buf, buf, dmalen); - set_pdma(s, PDMA, 0, dmalen); + set_pdma(s, CMD, 0, dmalen); esp_raise_drq(s); return 0; } @@ -316,24 +309,24 @@ static void satn_pdma_cb(ESPState *s) if (get_cmd_cb(s) < 0) { return; } - if (s->pdma_cur !=3D s->pdma_start) { - do_cmd(s, get_pdma_buf(s) + s->pdma_start); + s->do_cmd =3D 0; + if (s->cmdlen) { + do_cmd(s, s->cmdbuf); } } =20 static void handle_satn(ESPState *s) { - uint8_t buf[32]; - int len; - if (s->dma && !s->dma_enabled) { s->dma_cb =3D handle_satn; return; } s->pdma_cb =3D satn_pdma_cb; - len =3D get_cmd(s, buf, sizeof(buf)); - if (len) { - do_cmd(s, buf); + s->cmdlen =3D get_cmd(s, s->cmdbuf, sizeof(s->cmdbuf)); + if (s->cmdlen) { + do_cmd(s, s->cmdbuf); + } else { + s->do_cmd =3D 1; } } =20 @@ -342,24 +335,24 @@ static void s_without_satn_pdma_cb(ESPState *s) if (get_cmd_cb(s) < 0) { return; } - if (s->pdma_cur !=3D s->pdma_start) { + s->do_cmd =3D 0; + if (s->cmdlen) { do_busid_cmd(s, get_pdma_buf(s) + s->pdma_start, 0); } } =20 static void handle_s_without_atn(ESPState *s) { - uint8_t buf[32]; - int len; - if (s->dma && !s->dma_enabled) { s->dma_cb =3D handle_s_without_atn; return; } s->pdma_cb =3D s_without_satn_pdma_cb; - len =3D get_cmd(s, buf, sizeof(buf)); - if (len) { - do_busid_cmd(s, buf, 0); + s->cmdlen =3D get_cmd(s, s->cmdbuf, sizeof(s->cmdbuf)); + if (s->cmdlen) { + do_busid_cmd(s, s->cmdbuf, 0); + } else { + s->do_cmd =3D 1; } } =20 @@ -368,7 +361,7 @@ static void satn_stop_pdma_cb(ESPState *s) if (get_cmd_cb(s) < 0) { return; } - s->cmdlen =3D s->pdma_cur - s->pdma_start; + s->do_cmd =3D 0; if (s->cmdlen) { trace_esp_handle_satn_stop(s->cmdlen); s->do_cmd =3D 1; @@ -394,6 +387,8 @@ static void handle_satn_stop(ESPState *s) s->rregs[ESP_RINTR] =3D INTR_BS | INTR_FC; s->rregs[ESP_RSEQ] =3D SEQ_CD; esp_raise_irq(s); + } else { + s->do_cmd =3D 1; } } =20 @@ -868,11 +863,10 @@ static bool esp_pdma_needed(void *opaque) =20 static const VMStateDescription vmstate_esp_pdma =3D { .name =3D "esp/pdma", - .version_id =3D 1, - .minimum_version_id =3D 1, + .version_id =3D 2, + .minimum_version_id =3D 2, .needed =3D esp_pdma_needed, .fields =3D (VMStateField[]) { - VMSTATE_BUFFER(pdma_buf, ESPState), VMSTATE_INT32(pdma_origin, ESPState), VMSTATE_UINT32(pdma_len, ESPState), VMSTATE_UINT32(pdma_start, ESPState), diff --git a/include/hw/scsi/esp.h b/include/hw/scsi/esp.h index f45bbde23c..fd4779b497 100644 --- a/include/hw/scsi/esp.h +++ b/include/hw/scsi/esp.h @@ -16,7 +16,6 @@ typedef void (*ESPDMAMemoryReadWriteFunc)(void *opaque, u= int8_t *buf, int len); typedef struct ESPState ESPState; =20 enum pdma_origin_id { - PDMA, TI, CMD, ASYNC, @@ -52,10 +51,8 @@ struct ESPState { ESPDMAMemoryReadWriteFunc dma_memory_write; void *dma_opaque; void (*dma_cb)(ESPState *s); - uint8_t pdma_buf[32]; int pdma_origin; uint32_t pdma_len; - uint32_t pdma_start; uint32_t pdma_cur; void (*pdma_cb)(ESPState *s); =20 --=20 2.20.1