From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751424AbdAMUJI (ORCPT ); Fri, 13 Jan 2017 15:09:08 -0500 Received: from mout.gmx.net ([212.227.15.18]:51930 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751362AbdAMUJF (ORCPT ); Fri, 13 Jan 2017 15:09:05 -0500 From: =?UTF-8?q?Manuel=20Sch=C3=B6lling?= To: gregkh@linuxfoundation.org Cc: jslaby@suse.com, kilobyte@angband.pl, lkml14@scotdoyle.com, rdunlap@infradead.org, shorne@gmail.com, andrey_utkin@fastmail.com, akpm@linux-foundation.org, paul.burton@imgtec.com, daniel.vetter@ffwll.ch, tj@kernel.org, hdegoede@redhat.com, linux-kernel@vger.kernel.org, linux-fbdev@vger.kernel.org, =?UTF-8?q?Manuel=20Sch=C3=B6lling?= Subject: [PATCH v10 1/4] console: Move scrollback data into its own struct Date: Fri, 13 Jan 2017 21:07:55 +0100 Message-Id: <20170113200758.9880-2-manuel.schoelling@gmx.de> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170113200758.9880-1-manuel.schoelling@gmx.de> References: <20170113200758.9880-1-manuel.schoelling@gmx.de> In-Reply-To: <201701112105.R6Zog6jw%fengguang.wu@intel.com> References: <201701112105.R6Zog6jw%fengguang.wu@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Provags-ID: V03:K0:G/BhdkYFw8X5cy47EK/s3PZbko8aiPzownKxVyeMJVIOWgg/WCC IcmyZebbrexSsJoycJdVUCb/XdFmpaOrratYkCHFgRQFO7zrvhmszcp4fqQwR+bNro0NSzm QzccxcJ8ITsZ0390Wz6jfwLZtj6qxGMuDmPmxt/CSdTUKeip4j8yebjRo7OOsPtB2k1XzBQ yfSNcQA4D0tCCQ9L0sfLQ== X-UI-Out-Filterresults: notjunk:1;V01:K0:Rkkgho/riJ0=:mprUbEZgXIMopQclMEZZvB yb4gvdFZ/nrI4X5yQr8ymzOR7SzPyrfk0P+TMInCUG1CyGcyvzVbks8/Wn2aHn0fK2tEblIK+ tPD8+w7DmcqdY1YImmWpoId9SsSs4QsmvzfracfiZnfUBis6E5TEEHGt1HbU9znHQTG5wHwIh dRy9Am5EurUqFAVCOWI/2AWEd7cIf98+usK28wQszHxu++QlXX3y/A4IdGf0LP+YbCtv06e+h culzqlkI1sFvZHiO5grc70wqrcV99yc4BplSgJKFaMqiq1HBrIqgasGylJvOW3NLNYXd4YorG DWr0rhIJ8r3rlx0uplRgKM+OLD6i4cMrJJFCKbeBnEFk7ksxjHUvpFcn10hq/A46Le64JoALD LsDyGRoS/WvPZ3XvmZi7SgK1UjejMwa53J4hYhBFRvZL6qv+vIQFjdNHH3lnQHZtUhh/GpwZD myn8ADYYHAWX5d5XirFuTPmpi5DYOCygEBGrHD2ksfJA8MygZ/kzEWzMshfi+KJGcRND07k7P wFZdZg9EZ0YZFdjWscFbztfmzqWgsZccjxhZTn9kqcJUmZVHbT0EvAz9Xvm/UF+u97oVHu1pC VX7/pg7IIYTNHihWtm7/j+T5zK9x0F8kJxjr1F6ibBiSNx8JZxMg721L5x+9J74dKI9/9NySq 7xUmsoF3vmbwo+af5MC8Vv80SEARZA4ut1HL2kr5DF9pQeXmPGYO4AE/ilz9xgAAhPZfYNBMw NcipxWU3ZH4LQddyxxHWC72O0nVomwdf/feA3LXX2m/+dcIIqTpfaL0q0t27QZ5s+sBiDUAWN EI5huta Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This refactoring is in preparation for persistent scrollback support for VGA console. Signed-off-by: Manuel Schölling Reviewed-by: Andrey Utkin Tested-by: Andrey Utkin Tested-by: Adam Borowski --- 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 c22a56232b7c..48b97648d4af 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; } -- 2.11.0