From patchwork Mon Nov 27 13:15:35 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 748316 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de header.b="yHLqo2R3"; dkim=permerror (0-bit key) header.d=suse.de header.i=@suse.de header.b="AqG55K32" Received: from smtp-out1.suse.de (smtp-out1.suse.de [IPv6:2a07:de40:b251:101:10:150:64:1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 32A15AA for ; Mon, 27 Nov 2023 05:17:02 -0800 (PST) Received: from imap2.dmz-prg2.suse.org (imap2.dmz-prg2.suse.org [10.150.64.98]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id 8E10C21DB3; Mon, 27 Nov 2023 13:17:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1701091021; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=CW7v1z8xmQoBIbKurwpBRrAQceWgcaTp/28hSGC/1gY=; b=yHLqo2R37XmglrdOOSo1iirb1PgQ6gqaUxGPmsPn0CIEr5PVJGeStbjCD2yH3YtcLdFEcx 8RFvHUBoC1xfnMMqGZoXCUAGQfd9Vl1WGwub9UFnnkvnzWuow4ETTpUB74p6cp7wm2Iwk+ 06rr19KwfpqWIYQBwrpSNTp9nanlmqU= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1701091021; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=CW7v1z8xmQoBIbKurwpBRrAQceWgcaTp/28hSGC/1gY=; b=AqG55K32kFx6AUtn9nMbh4E8gOdc3jaYx7UP8/aCGaQzTD2XcdY5gDWikd+6Zt5xOUWroY b6EDVzQ/qEYzjuAw== Received: from imap2.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap2.dmz-prg2.suse.org (Postfix) with ESMTPS id 64625132A6; Mon, 27 Nov 2023 13:17:01 +0000 (UTC) Received: from dovecot-director2.suse.de ([10.150.64.162]) by imap2.dmz-prg2.suse.org with ESMTPSA id cBdwF82WZGUhLQAAn2gu4w (envelope-from ); Mon, 27 Nov 2023 13:17:01 +0000 From: Thomas Zimmermann To: javierm@redhat.com, deller@gmx.de Cc: linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, Thomas Zimmermann , Jaya Kumar Subject: [PATCH v2 06/32] fbdev/arcfb: Use generator macros for deferred I/O Date: Mon, 27 Nov 2023 14:15:35 +0100 Message-ID: <20231127131655.4020-7-tzimmermann@suse.de> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231127131655.4020-1-tzimmermann@suse.de> References: <20231127131655.4020-1-tzimmermann@suse.de> Precedence: bulk X-Mailing-List: linux-fbdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Authentication-Results: smtp-out1.suse.de; none X-Spam-Level: X-Spamd-Result: default: False [0.70 / 50.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; TO_DN_SOME(0.00)[]; R_MISSING_CHARSET(2.50)[]; BROKEN_CONTENT_TYPE(1.50)[]; RCPT_COUNT_FIVE(0.00)[6]; RCVD_COUNT_THREE(0.00)[3]; NEURAL_HAM_SHORT(-0.20)[-0.999]; FREEMAIL_TO(0.00)[redhat.com,gmx.de]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; BAYES_HAM(-3.00)[100.00%]; ARC_NA(0.00)[]; FROM_HAS_DN(0.00)[]; FREEMAIL_ENVRCPT(0.00)[gmx.de]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[text/plain]; NEURAL_HAM_LONG(-1.00)[-1.000]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; MID_CONTAINS_FROM(1.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:email]; FUZZY_BLOCKED(0.00)[rspamd.com]; RCVD_TLS_ALL(0.00)[] X-Spam-Score: 0.70 Implement the driver's fops with the generator macros for deferred I/O. Only requires per-driver code for the on-scren scanout buffer. The generated helpers implement reading, writing and drawing on top of that. Also update the selected Kconfig tokens accordingly. Actual support for deferred I/O is missing from the driver. So writing to memory-mapped pages does not automatically update the scanout buffer. Signed-off-by: Thomas Zimmermann Cc: Jaya Kumar Acked-by: Javier Martinez Canillas --- drivers/video/fbdev/Kconfig | 5 +- drivers/video/fbdev/arcfb.c | 113 +++++++++--------------------------- 2 files changed, 27 insertions(+), 91 deletions(-) diff --git a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig index 63956382ffb65..44bf622fc8d74 100644 --- a/drivers/video/fbdev/Kconfig +++ b/drivers/video/fbdev/Kconfig @@ -272,10 +272,7 @@ config FB_FM2 config FB_ARC tristate "Arc Monochrome LCD board support" depends on FB && (X86 || COMPILE_TEST) - select FB_SYS_FILLRECT - select FB_SYS_COPYAREA - select FB_SYS_IMAGEBLIT - select FB_SYS_FOPS + select FB_SYSMEM_HELPERS_DEFERRED help This enables support for the Arc Monochrome LCD board. The board is based on the KS-108 lcd controller and is typically a matrix diff --git a/drivers/video/fbdev/arcfb.c b/drivers/video/fbdev/arcfb.c index 7344e825543af..b2408543277ce 100644 --- a/drivers/video/fbdev/arcfb.c +++ b/drivers/video/fbdev/arcfb.c @@ -363,39 +363,6 @@ static void arcfb_lcd_update(struct arcfb_par *par, unsigned int dx, } } -static void arcfb_fillrect(struct fb_info *info, - const struct fb_fillrect *rect) -{ - struct arcfb_par *par = info->par; - - sys_fillrect(info, rect); - - /* update the physical lcd */ - arcfb_lcd_update(par, rect->dx, rect->dy, rect->width, rect->height); -} - -static void arcfb_copyarea(struct fb_info *info, - const struct fb_copyarea *area) -{ - struct arcfb_par *par = info->par; - - sys_copyarea(info, area); - - /* update the physical lcd */ - arcfb_lcd_update(par, area->dx, area->dy, area->width, area->height); -} - -static void arcfb_imageblit(struct fb_info *info, const struct fb_image *image) -{ - struct arcfb_par *par = info->par; - - sys_imageblit(info, image); - - /* update the physical lcd */ - arcfb_lcd_update(par, image->dx, image->dy, image->width, - image->height); -} - static int arcfb_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg) { @@ -436,76 +403,48 @@ static int arcfb_ioctl(struct fb_info *info, } } -/* - * this is the access path from userspace. they can seek and write to - * the fb. it's inefficient for them to do anything less than 64*8 - * writes since we update the lcd in each write() anyway. - */ -static ssize_t arcfb_write(struct fb_info *info, const char __user *buf, - size_t count, loff_t *ppos) +static void arcfb_damage_range(struct fb_info *info, off_t off, size_t len) { - /* modded from epson 1355 */ - - unsigned long p; - int err; - unsigned int fbmemlength,x,y,w,h, bitppos, startpos, endpos, bitcount; - struct arcfb_par *par; - unsigned int xres; - - if (!info->screen_buffer) - return -ENODEV; - - p = *ppos; - par = info->par; - xres = info->var.xres; - fbmemlength = (xres * info->var.yres)/8; - - if (p > fbmemlength) - return -ENOSPC; - - err = 0; - if ((count + p) > fbmemlength) { - count = fbmemlength - p; - err = -ENOSPC; - } - - if (count) { - char *base_addr; - - base_addr = info->screen_buffer; - count -= copy_from_user(base_addr + p, buf, count); - *ppos += count; - err = -EFAULT; - } - + struct arcfb_par *par = info->par; + unsigned int xres = info->var.xres; + unsigned int bitppos, startpos, endpos, bitcount; + unsigned int x, y, width, height; - bitppos = p*8; + bitppos = off * 8; startpos = floorXres(bitppos, xres); - endpos = ceilXres((bitppos + (count*8)), xres); + endpos = ceilXres((bitppos + (len * 8)), xres); bitcount = endpos - startpos; x = startpos % xres; y = startpos / xres; - w = xres; - h = bitcount / xres; - arcfb_lcd_update(par, x, y, w, h); + width = xres; + height = bitcount / xres; + + arcfb_lcd_update(par, x, y, width, height); +} - if (count) - return count; - return err; +static void arcfb_damage_area(struct fb_info *info, u32 x, u32 y, + u32 width, u32 height) +{ + struct arcfb_par *par = info->par; + + /* update the physical lcd */ + arcfb_lcd_update(par, x, y, width, height); } +FB_GEN_DEFAULT_DEFERRED_SYSMEM_OPS(arcfb, + arcfb_damage_range, + arcfb_damage_area) + static const struct fb_ops arcfb_ops = { .owner = THIS_MODULE, .fb_open = arcfb_open, - .fb_read = fb_sys_read, - .fb_write = arcfb_write, + __FB_DEFAULT_DEFERRED_OPS_RDWR(arcfb), .fb_release = arcfb_release, .fb_pan_display = arcfb_pan_display, - .fb_fillrect = arcfb_fillrect, - .fb_copyarea = arcfb_copyarea, - .fb_imageblit = arcfb_imageblit, + __FB_DEFAULT_DEFERRED_OPS_DRAW(arcfb), .fb_ioctl = arcfb_ioctl, + // .fb_mmap reqires deferred I/O }; static int arcfb_probe(struct platform_device *dev)