From patchwork Tue Nov 22 16:43:37 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Manuel_Sch=C3=B6lling?= X-Patchwork-Id: 9441543 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 83107600BA for ; Tue, 22 Nov 2016 16:45:23 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7728728481 for ; Tue, 22 Nov 2016 16:45:23 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6B482284B6; Tue, 22 Nov 2016 16:45:23 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,FREEMAIL_FROM, RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BACFF28541 for ; Tue, 22 Nov 2016 16:45:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755725AbcKVQon (ORCPT ); Tue, 22 Nov 2016 11:44:43 -0500 Received: from mout.gmx.net ([212.227.15.15]:59669 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753368AbcKVQok (ORCPT ); Tue, 22 Nov 2016 11:44:40 -0500 Received: from schoellingm.dzne.de ([88.152.8.141]) by mail.gmx.com (mrgmx002 [212.227.17.190]) with ESMTPSA (Nemesis) id 0Lbuo0-1cYckl1OQ0-00jI59; Tue, 22 Nov 2016 17:43:43 +0100 From: =?UTF-8?q?Manuel=20Sch=C3=B6lling?= To: linux-fbdev@vger.kernel.org Cc: linux-kernel@vger.kernel.org, =?UTF-8?q?Manuel=20Sch=C3=B6lling?= Subject: [PATCH v6 1/2] console: Move scrollback data into its own struct Date: Tue, 22 Nov 2016 17:43:37 +0100 Message-Id: <1479833018-20021-2-git-send-email-manuel.schoelling@gmx.de> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1479833018-20021-1-git-send-email-manuel.schoelling@gmx.de> References: <1479833018-20021-1-git-send-email-manuel.schoelling@gmx.de> MIME-Version: 1.0 X-Provags-ID: V03:K0:6vtRcstt2Hp2WuYPuehOR3Ro2X5pmRpOtpG4Q/O0VVO025aE6nA LaY00w/Fw7iYNQcLf7uhQcIgOPK+wjb0M9HjQJu7kY6Dvl+Uilx7xBD4ktGLz1k6+CNg3Pj bR/UqXrp9MdNuWwx0+lBMgYFaU4uTkPxuvG21SclCPQztxltXXD7SUFEIxkFCxAVUuKkOYF XUqJxTRWJVwWgPs0Qqp5g== X-UI-Out-Filterresults: notjunk:1; V01:K0:6kt4kMd2T5k=:sQIANav1tRAn96NXoy7buc dsWMqCtB1DvJkHKr20EvUDOqtJrvMM/0FPwluACJBlrTEyxiKMvd70IZo4KxX40/nNqlkY2Z9 wtSveCnbQ/U8GGSYfazczD1bWQyeXvS9fpb0eZWNLibIB3tlkhcV/3H49KFS6ppvYqUF8JhOj CWGrqJWa0nMz7vgqdnwpyrQMc2swGphuemG2jA9ueGFft9KoMBs03Wu2EBWTsEMA34tk04TkZ cUE+kHVpjKYAeKcF65HBk+ueFgEUt4i8nsoX5bkghpAUGx2/w+6uMLJ41FaNLEHLuqk8eRC5g C2FJJ5xFb7VRToG1ay7zhnUQtBVWB1thilRA+qyaGSmF3WzvF0UCtJ1wK6Sa9cITDkojm1Zb9 qc8fNZ5Ah+VYJ/Emp7AplRmYXhd/UgDhYRolSOGuCmeOsrrTlB6Y5yyRFgQZNJFTN3z7K5VNe XRMe81fKr4gI21neXNe4+V2uyOqX8qwbDTo83N5OdVAhYnU6HwcM9cNo2fdL3u1VIDUeM+/Ol 3am2dQ0L6H376oPie8P9YkBkJNHvyvdk8PrfQ+NxjAcGaC/yizbce/2D5WplL5TfXijwidWRf GKgXq/wuwAoc1uq+ML2TOvhw2WNW9DS+nSLX77LvW3HfTvo1FIRAZwZ5297EYyYE8dc9T5/5c rVsp0egBd+YGFeUMoDMwqEgp7xskSYAbQJiAM1yZCelHHz89Pq64YE5V4K6y4Jm4jwAOxn+JE lMypsZyZLTDGP7xOAm3dM0JXLp1BanciUgMpLNB3BLv9XDHBoEUks3aaLAIDR3/NhMGtjacei EbecAvo Sender: linux-fbdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This refactoring is in preparation for persistent scrollback support for VGA console. Signed-off-by: Manuel Schölling --- drivers/video/console/vgacon.c | 91 ++++++++++++++++++++++-------------------- 1 file changed, 47 insertions(+), 44 deletions(-) diff --git a/drivers/video/console/vgacon.c b/drivers/video/console/vgacon.c index c22a562..48b9764 100644 --- a/drivers/video/console/vgacon.c +++ b/drivers/video/console/vgacon.c @@ -162,31 +162,34 @@ static inline void vga_set_mem_top(struct vc_data *c) #ifdef CONFIG_VGACON_SOFT_SCROLLBACK /* software scrollback */ -static void *vgacon_scrollback; -static int vgacon_scrollback_tail; -static int vgacon_scrollback_size; -static int vgacon_scrollback_rows; -static int vgacon_scrollback_cnt; -static int vgacon_scrollback_cur; -static int vgacon_scrollback_save; -static int vgacon_scrollback_restore; +static struct vgacon_scrollback_info { + void *data; + int tail; + int size; + int rows; + int cnt; + int cur; + int save; + int restore; +} vgacon_scrollback; static void vgacon_scrollback_init(int pitch) { int rows = CONFIG_VGACON_SOFT_SCROLLBACK_SIZE * 1024/pitch; - if (vgacon_scrollback) { - vgacon_scrollback_cnt = 0; - vgacon_scrollback_tail = 0; - vgacon_scrollback_cur = 0; - vgacon_scrollback_rows = rows - 1; - vgacon_scrollback_size = rows * pitch; + if (vgacon_scrollback.data) { + vgacon_scrollback.cnt = 0; + vgacon_scrollback.tail = 0; + vgacon_scrollback.cur = 0; + vgacon_scrollback.rows = rows - 1; + vgacon_scrollback.size = rows * pitch; } } static void vgacon_scrollback_startup(void) { - vgacon_scrollback = kcalloc(CONFIG_VGACON_SOFT_SCROLLBACK_SIZE, 1024, GFP_NOWAIT); + vgacon_scrollback.data = kcalloc(CONFIG_VGACON_SOFT_SCROLLBACK_SIZE, + 1024, GFP_NOWAIT); vgacon_scrollback_init(vga_video_num_columns * 2); } @@ -194,38 +197,38 @@ static void vgacon_scrollback_update(struct vc_data *c, int t, int count) { void *p; - if (!vgacon_scrollback_size || c->vc_num != fg_console) + if (!vgacon_scrollback.size || c->vc_num != fg_console) return; p = (void *) (c->vc_origin + t * c->vc_size_row); while (count--) { - scr_memcpyw(vgacon_scrollback + vgacon_scrollback_tail, + scr_memcpyw(vgacon_scrollback.data + vgacon_scrollback.tail, p, c->vc_size_row); - vgacon_scrollback_cnt++; + vgacon_scrollback.cnt++; p += c->vc_size_row; - vgacon_scrollback_tail += c->vc_size_row; + vgacon_scrollback.tail += c->vc_size_row; - if (vgacon_scrollback_tail >= vgacon_scrollback_size) - vgacon_scrollback_tail = 0; + if (vgacon_scrollback.tail >= vgacon_scrollback.size) + vgacon_scrollback.tail = 0; - if (vgacon_scrollback_cnt > vgacon_scrollback_rows) - vgacon_scrollback_cnt = vgacon_scrollback_rows; + if (vgacon_scrollback.cnt > vgacon_scrollback.rows) + vgacon_scrollback.cnt = vgacon_scrollback.rows; - vgacon_scrollback_cur = vgacon_scrollback_cnt; + vgacon_scrollback.cur = vgacon_scrollback.cnt; } } static void vgacon_restore_screen(struct vc_data *c) { - vgacon_scrollback_save = 0; + vgacon_scrollback.save = 0; - if (!vga_is_gfx && !vgacon_scrollback_restore) { + if (!vga_is_gfx && !vgacon_scrollback.restore) { scr_memcpyw((u16 *) c->vc_origin, (u16 *) c->vc_screenbuf, c->vc_screenbuf_size > vga_vram_size ? vga_vram_size : c->vc_screenbuf_size); - vgacon_scrollback_restore = 1; - vgacon_scrollback_cur = vgacon_scrollback_cnt; + vgacon_scrollback.restore = 1; + vgacon_scrollback.cur = vgacon_scrollback.cnt; } } @@ -239,41 +242,41 @@ static void vgacon_scrolldelta(struct vc_data *c, int lines) return; } - if (!vgacon_scrollback) + if (!vgacon_scrollback.data) return; - if (!vgacon_scrollback_save) { + if (!vgacon_scrollback.save) { vgacon_cursor(c, CM_ERASE); vgacon_save_screen(c); - vgacon_scrollback_save = 1; + vgacon_scrollback.save = 1; } - vgacon_scrollback_restore = 0; - start = vgacon_scrollback_cur + lines; + vgacon_scrollback.restore = 0; + start = vgacon_scrollback.cur + lines; end = start + abs(lines); if (start < 0) start = 0; - if (start > vgacon_scrollback_cnt) - start = vgacon_scrollback_cnt; + if (start > vgacon_scrollback.cnt) + start = vgacon_scrollback.cnt; if (end < 0) end = 0; - if (end > vgacon_scrollback_cnt) - end = vgacon_scrollback_cnt; + if (end > vgacon_scrollback.cnt) + end = vgacon_scrollback.cnt; - vgacon_scrollback_cur = start; + vgacon_scrollback.cur = start; count = end - start; - soff = vgacon_scrollback_tail - ((vgacon_scrollback_cnt - end) * + soff = vgacon_scrollback.tail - ((vgacon_scrollback.cnt - end) * c->vc_size_row); soff -= count * c->vc_size_row; if (soff < 0) - soff += vgacon_scrollback_size; + soff += vgacon_scrollback.size; - count = vgacon_scrollback_cnt - start; + count = vgacon_scrollback.cnt - start; if (count > c->vc_rows) count = c->vc_rows; @@ -287,13 +290,13 @@ static void vgacon_scrolldelta(struct vc_data *c, int lines) count *= c->vc_size_row; /* how much memory to end of buffer left? */ - copysize = min(count, vgacon_scrollback_size - soff); - scr_memcpyw(d, vgacon_scrollback + soff, copysize); + copysize = min(count, vgacon_scrollback.size - soff); + scr_memcpyw(d, vgacon_scrollback.data + soff, copysize); d += copysize; count -= copysize; if (count) { - scr_memcpyw(d, vgacon_scrollback, count); + scr_memcpyw(d, vgacon_scrollback.data, count); d += count; }