From patchwork Tue Apr 5 21:03:24 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Vetter X-Patchwork-Id: 12801980 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E116CC433EF for ; Tue, 5 Apr 2022 21:04:19 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 19DC210EEC4; Tue, 5 Apr 2022 21:03:53 +0000 (UTC) Received: from mail-wm1-x32b.google.com (mail-wm1-x32b.google.com [IPv6:2a00:1450:4864:20::32b]) by gabe.freedesktop.org (Postfix) with ESMTPS id D5C9710EEB7 for ; Tue, 5 Apr 2022 21:03:48 +0000 (UTC) Received: by mail-wm1-x32b.google.com with SMTP id l9-20020a05600c4f0900b0038ccd1b8642so2115752wmq.0 for ; Tue, 05 Apr 2022 14:03:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ffwll.ch; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=16UYcGOyHpR/dVvxSs9F8FtrSh6HlGyfLjCXSqF/Oqo=; b=PbMcnIvdWlTjMiOUZ16BYWh0XWpiC0+3/LpHWg7ywK894TXWrkL1NxVGlH7IHLt/fM Drt2iZ7TEHK7vt2dEmH4Zvbl6fH/bTWn8AymGgPAN5BIVLTXXgz7HG1Gw1wuLMOsaUQa PZKL7Zxkf8/P9rf+wXs8NrUe1HiKHsOot2oC4= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=16UYcGOyHpR/dVvxSs9F8FtrSh6HlGyfLjCXSqF/Oqo=; b=fIV6ixm7pe+9193eXyYB5D+ZJr2HoTNNrNF2OtzKjEIjR9ax7qyQWylxfrBENbEujz 4AZTC/nT2JkBQZgzYLyqnAFqM7bF17KMGX8E7bVyA+TYsz0V+fTfV9ziwLM+eJ16f5Sl cg6UYUtG1NaYfpB5Mr7ZzH/JoCVjSYctMQGXpcX6ZMGA2OG2bJwC8ec5EqXFt2vGqYje 2z6V5oAB4bBQvV7vYNfoJpUoav42hivcnbRa5LMMq63nfbfDYJ9B+pMHDeGSlcWWht5Z tGD7RanggyyJB1Gd4Cy/E74C9bVOjlMISULsfNEdQlYIzB1M1jHskaQO6jvyJ1B7sstN NvLw== X-Gm-Message-State: AOAM531JEhwIiUZrcoF7qu6wIyBLB4j1e3L65X4ZAuwy+dNG1tG9iu+T YH510yLgKHh54jvLyxIZDL3Wk1Ey27HFDO7DuRM= X-Google-Smtp-Source: ABdhPJwgiMMa0WIfXY6o6+QUYmciuQJH8pmgOIq2hAEQp0BR7t/9S0G/6ZN//r3zdoRsJxtNliUUHQ== X-Received: by 2002:a05:600c:34c9:b0:38c:15a1:eb7c with SMTP id d9-20020a05600c34c900b0038c15a1eb7cmr4714227wmq.191.1649192627449; Tue, 05 Apr 2022 14:03:47 -0700 (PDT) Received: from phenom.ffwll.local ([2a02:168:57f4:0:efd0:b9e5:5ae6:c2fa]) by smtp.gmail.com with ESMTPSA id az19-20020a05600c601300b0038cadf3aa69sm4858569wmb.36.2022.04.05.14.03.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 05 Apr 2022 14:03:46 -0700 (PDT) From: Daniel Vetter To: DRI Development Subject: [PATCH v3 06/17] fbcon: Use delayed work for cursor Date: Tue, 5 Apr 2022 23:03:24 +0200 Message-Id: <20220405210335.3434130-7-daniel.vetter@ffwll.ch> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220405210335.3434130-1-daniel.vetter@ffwll.ch> References: <20220405210335.3434130-1-daniel.vetter@ffwll.ch> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Thomas Zimmermann , Du Cheng , Tetsuo Handa , Daniel Vetter , Intel Graphics Development , Javier Martinez Canillas , Claudio Suarez , Greg Kroah-Hartman , Daniel Vetter Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Allows us to delete a bunch of hand-rolled stuff using a timer plus a separate work). Also to simplify the code we initialize the cursor_work completely when we allocate the fbcon_ops structure, instead of trying to cope with console re-initialization. The motiviation here is that fbcon code stops using the fb_info.queue, which helps with locking issues around cleanup and all that in a later patch. Also note that this allows us to ditch the hand-rolled work cleanup in fbcon_exit - we already call fbcon_del_cursor_timer, which takes care of everything. Plus this was racy anyway. v2: - Only INIT_DELAYED_WORK when kzalloc succeeded (Tetsuo) - Explain that we replace both the timer and a work with the combined delayed_work (Javier) Reviewed-by: Javier Martinez Canillas Acked-by: Thomas Zimmermann Signed-off-by: Daniel Vetter Cc: Daniel Vetter Cc: Claudio Suarez Cc: Du Cheng Cc: Thomas Zimmermann Cc: Greg Kroah-Hartman Cc: Tetsuo Handa --- drivers/video/fbdev/core/fbcon.c | 85 +++++++++++++------------------- drivers/video/fbdev/core/fbcon.h | 4 +- 2 files changed, 35 insertions(+), 54 deletions(-) diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c index 83f0223f5333..759299667023 100644 --- a/drivers/video/fbdev/core/fbcon.c +++ b/drivers/video/fbdev/core/fbcon.c @@ -350,8 +350,8 @@ static int get_color(struct vc_data *vc, struct fb_info *info, static void fb_flashcursor(struct work_struct *work) { - struct fb_info *info = container_of(work, struct fb_info, queue); - struct fbcon_ops *ops = info->fbcon_par; + struct fbcon_ops *ops = container_of(work, struct fbcon_ops, cursor_work.work); + struct fb_info *info; struct vc_data *vc = NULL; int c; int mode; @@ -364,7 +364,10 @@ static void fb_flashcursor(struct work_struct *work) if (ret == 0) return; - if (ops && ops->currcon != -1) + /* protected by console_lock */ + info = ops->info; + + if (ops->currcon != -1) vc = vc_cons[ops->currcon].d; if (!vc || !con_is_visible(vc) || @@ -380,42 +383,25 @@ static void fb_flashcursor(struct work_struct *work) ops->cursor(vc, info, mode, get_color(vc, info, c, 1), get_color(vc, info, c, 0)); console_unlock(); -} -static void cursor_timer_handler(struct timer_list *t) -{ - struct fbcon_ops *ops = from_timer(ops, t, cursor_timer); - struct fb_info *info = ops->info; - - queue_work(system_power_efficient_wq, &info->queue); - mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies); + queue_delayed_work(system_power_efficient_wq, &ops->cursor_work, + ops->cur_blink_jiffies); } -static void fbcon_add_cursor_timer(struct fb_info *info) +static void fbcon_add_cursor_work(struct fb_info *info) { struct fbcon_ops *ops = info->fbcon_par; - if ((!info->queue.func || info->queue.func == fb_flashcursor) && - !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) && - !fbcon_cursor_noblink) { - if (!info->queue.func) - INIT_WORK(&info->queue, fb_flashcursor); - - timer_setup(&ops->cursor_timer, cursor_timer_handler, 0); - mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies); - ops->flags |= FBCON_FLAGS_CURSOR_TIMER; - } + if (!fbcon_cursor_noblink) + queue_delayed_work(system_power_efficient_wq, &ops->cursor_work, + ops->cur_blink_jiffies); } -static void fbcon_del_cursor_timer(struct fb_info *info) +static void fbcon_del_cursor_work(struct fb_info *info) { struct fbcon_ops *ops = info->fbcon_par; - if (info->queue.func == fb_flashcursor && - ops->flags & FBCON_FLAGS_CURSOR_TIMER) { - del_timer_sync(&ops->cursor_timer); - ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER; - } + cancel_delayed_work_sync(&ops->cursor_work); } #ifndef MODULE @@ -717,6 +703,8 @@ static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info, } if (!err) { + INIT_DELAYED_WORK(&ops->cursor_work, fb_flashcursor); + ops->cur_blink_jiffies = HZ / 5; ops->info = info; info->fbcon_par = ops; @@ -751,7 +739,7 @@ static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo, } if (!err) { - fbcon_del_cursor_timer(oldinfo); + fbcon_del_cursor_work(oldinfo); kfree(ops->cursor_state.mask); kfree(ops->cursor_data); kfree(ops->cursor_src); @@ -867,7 +855,7 @@ static int set_con2fb_map(int unit, int newidx, int user) logo_shown != FBCON_LOGO_DONTSHOW); if (!found) - fbcon_add_cursor_timer(info); + fbcon_add_cursor_work(info); con2fb_map_boot[unit] = newidx; con2fb_init_display(vc, info, unit, show_logo); } @@ -964,6 +952,8 @@ static const char *fbcon_startup(void) return NULL; } + INIT_DELAYED_WORK(&ops->cursor_work, fb_flashcursor); + ops->currcon = -1; ops->graphics = 1; ops->cur_rotate = -1; @@ -1006,7 +996,7 @@ static const char *fbcon_startup(void) info->var.yres, info->var.bits_per_pixel); - fbcon_add_cursor_timer(info); + fbcon_add_cursor_work(info); return display_desc; } @@ -1194,7 +1184,7 @@ static void fbcon_deinit(struct vc_data *vc) goto finished; if (con_is_visible(vc)) - fbcon_del_cursor_timer(info); + fbcon_del_cursor_work(info); ops->flags &= ~FBCON_FLAGS_INIT; finished: @@ -1320,9 +1310,9 @@ static void fbcon_cursor(struct vc_data *vc, int mode) return; if (vc->vc_cursor_type & CUR_SW) - fbcon_del_cursor_timer(info); + fbcon_del_cursor_work(info); else - fbcon_add_cursor_timer(info); + fbcon_add_cursor_work(info); ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1; @@ -2132,14 +2122,14 @@ static int fbcon_switch(struct vc_data *vc) } if (old_info != info) - fbcon_del_cursor_timer(old_info); + fbcon_del_cursor_work(old_info); } if (fbcon_is_inactive(vc, info) || ops->blank_state != FB_BLANK_UNBLANK) - fbcon_del_cursor_timer(info); + fbcon_del_cursor_work(info); else - fbcon_add_cursor_timer(info); + fbcon_add_cursor_work(info); set_blitting_type(vc, info); ops->cursor_reset = 1; @@ -2247,9 +2237,9 @@ static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch) if (mode_switch || fbcon_is_inactive(vc, info) || ops->blank_state != FB_BLANK_UNBLANK) - fbcon_del_cursor_timer(info); + fbcon_del_cursor_work(info); else - fbcon_add_cursor_timer(info); + fbcon_add_cursor_work(info); return 0; } @@ -3181,7 +3171,7 @@ static ssize_t show_cursor_blink(struct device *device, if (!ops) goto err; - blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0; + blink = delayed_work_pending(&ops->cursor_work); err: console_unlock(); return snprintf(buf, PAGE_SIZE, "%d\n", blink); @@ -3210,10 +3200,10 @@ static ssize_t store_cursor_blink(struct device *device, if (blink) { fbcon_cursor_noblink = 0; - fbcon_add_cursor_timer(info); + fbcon_add_cursor_work(info); } else { fbcon_cursor_noblink = 1; - fbcon_del_cursor_timer(info); + fbcon_del_cursor_work(info); } err: @@ -3314,15 +3304,9 @@ static void fbcon_exit(void) #endif for_each_registered_fb(i) { - int pending = 0; - mapped = 0; info = registered_fb[i]; - if (info->queue.func) - pending = cancel_work_sync(&info->queue); - pr_debug("fbcon: %s pending work\n", (pending ? "canceled" : "no")); - for (j = first_fb_vc; j <= last_fb_vc; j++) { if (con2fb_map[j] == i) { mapped = 1; @@ -3338,15 +3322,12 @@ static void fbcon_exit(void) if (info->fbcon_par) { struct fbcon_ops *ops = info->fbcon_par; - fbcon_del_cursor_timer(info); + fbcon_del_cursor_work(info); kfree(ops->cursor_src); kfree(ops->cursor_state.mask); kfree(info->fbcon_par); info->fbcon_par = NULL; } - - if (info->queue.func == fb_flashcursor) - info->queue.func = NULL; } } } diff --git a/drivers/video/fbdev/core/fbcon.h b/drivers/video/fbdev/core/fbcon.h index 969d41ecede5..6708ca0048aa 100644 --- a/drivers/video/fbdev/core/fbcon.h +++ b/drivers/video/fbdev/core/fbcon.h @@ -14,11 +14,11 @@ #include #include #include +#include #include #define FBCON_FLAGS_INIT 1 -#define FBCON_FLAGS_CURSOR_TIMER 2 /* * This is the interface between the low-level console driver and the @@ -68,7 +68,7 @@ struct fbcon_ops { int (*update_start)(struct fb_info *info); int (*rotate_font)(struct fb_info *info, struct vc_data *vc); struct fb_var_screeninfo var; /* copy of the current fb_var_screeninfo */ - struct timer_list cursor_timer; /* Cursor timer */ + struct delayed_work cursor_work; /* Cursor timer */ struct fb_cursor cursor_state; struct fbcon_display *p; struct fb_info *info;