From patchwork Wed Apr 10 13:02:17 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 13624374 Received: from smtp-out1.suse.de (smtp-out1.suse.de [195.135.223.130]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8C50815E5CD for ; Wed, 10 Apr 2024 13:06:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=195.135.223.130 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712754370; cv=none; b=C176+yIIfEx73o5n5glf2NwGYGcEiQ/pNtPRb0ltOUHA/AvXVcxlzAAmDcnIzkhB4k7s2bo2fktyajdM8GIx6Jw0YFTA+gdsl8CNXBXnJMK08duYv7hSQ2T6YxN3wI9Pu92xxlZAGyi1pHceI9YDjYw75iCcOb4cF2+pkCpsWRE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712754370; c=relaxed/simple; bh=GQOh04HguvFGGpNiU6rSwkOAHA1iKrAtAFfcUnX02LE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=fyXfbjg8IqgKmZYH7gu9dIRZEPwWcDXZLiHzUgKX1tzZUnNokjuvMSQtFfLwusgX0qKwFFh3Lrpqs9WYJcZR7PYxtclO9+1xPh+HXtQDEysb9AaGq03yn0XTRboVZk/QxOEcuxI7POSnSLSZt2axXisc9rfCPe1UUvLjTw+XVpE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=suse.de; spf=pass smtp.mailfrom=suse.de; arc=none smtp.client-ip=195.135.223.130 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=suse.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=suse.de Received: from imap2.dmz-prg2.suse.org (imap2.dmz-prg2.suse.org [IPv6:2a07:de40:b281:104:10:150:64:98]) (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 A381A351F2; Wed, 10 Apr 2024 13:06:04 +0000 (UTC) Authentication-Results: smtp-out1.suse.de; none 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 718B51390D; Wed, 10 Apr 2024 13:06:04 +0000 (UTC) Received: from dovecot-director2.suse.de ([10.150.64.162]) by imap2.dmz-prg2.suse.org with ESMTPSA id aLGKGryOFmYdEgAAn2gu4w (envelope-from ); Wed, 10 Apr 2024 13:06:04 +0000 From: Thomas Zimmermann To: javierm@redhat.com, deller@gmx.de, airlied@gmail.com, daniel@ffwll.ch Cc: dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, Thomas Zimmermann Subject: [PATCH v2 21/43] drm/fbdev-dma: Implement damage handling and deferred I/O Date: Wed, 10 Apr 2024 15:02:17 +0200 Message-ID: <20240410130557.31572-22-tzimmermann@suse.de> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240410130557.31572-1-tzimmermann@suse.de> References: <20240410130557.31572-1-tzimmermann@suse.de> Precedence: bulk X-Mailing-List: linux-fbdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Rspamd-Pre-Result: action=no action; module=replies; Message is reply to one we originated X-Spam-Level: X-Spamd-Result: default: False [-4.00 / 50.00]; REPLY(-4.00)[] X-Spam-Flag: NO X-Spam-Score: -4.00 X-Rspamd-Queue-Id: A381A351F2 X-Rspamd-Server: rspamd2.dmz-prg2.suse.org X-Rspamd-Pre-Result: action=no action; module=replies; Message is reply to one we originated X-Rspamd-Action: no action Add support for damage handling and deferred I/O to fbdev-dma. This enables fbdev-dma to support all DMA-memory-based DRM drivers, even such with a dirty callback in their framebuffers. The patch adds the code for deferred I/O and also sets a dedicated helper for struct fb_ops.fb_mmap that support coherent mappings. Signed-off-by: Thomas Zimmermann Reviewed-by: Javier Martinez Canillas --- drivers/gpu/drm/drm_fbdev_dma.c | 65 ++++++++++++++++++++++++++------- 1 file changed, 51 insertions(+), 14 deletions(-) diff --git a/drivers/gpu/drm/drm_fbdev_dma.c b/drivers/gpu/drm/drm_fbdev_dma.c index 6c9427bb4053b..8ffd072368bca 100644 --- a/drivers/gpu/drm/drm_fbdev_dma.c +++ b/drivers/gpu/drm/drm_fbdev_dma.c @@ -4,6 +4,7 @@ #include #include +#include #include #include #include @@ -35,6 +36,22 @@ static int drm_fbdev_dma_fb_release(struct fb_info *info, int user) return 0; } +FB_GEN_DEFAULT_DEFERRED_SYSMEM_OPS(drm_fbdev_dma, + drm_fb_helper_damage_range, + drm_fb_helper_damage_area); + +static int drm_fbdev_dma_fb_mmap(struct fb_info *info, struct vm_area_struct *vma) +{ + struct drm_fb_helper *fb_helper = info->par; + struct drm_framebuffer *fb = fb_helper->fb; + struct drm_gem_dma_object *dma = drm_fb_dma_get_gem_obj(fb, 0); + + if (!dma->map_noncoherent) + vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); + + return fb_deferred_io_mmap(info, vma); +} + static void drm_fbdev_dma_fb_destroy(struct fb_info *info) { struct drm_fb_helper *fb_helper = info->par; @@ -51,20 +68,13 @@ static void drm_fbdev_dma_fb_destroy(struct fb_info *info) kfree(fb_helper); } -static int drm_fbdev_dma_fb_mmap(struct fb_info *info, struct vm_area_struct *vma) -{ - struct drm_fb_helper *fb_helper = info->par; - - return drm_gem_prime_mmap(fb_helper->buffer->gem, vma); -} - static const struct fb_ops drm_fbdev_dma_fb_ops = { .owner = THIS_MODULE, .fb_open = drm_fbdev_dma_fb_open, .fb_release = drm_fbdev_dma_fb_release, - __FB_DEFAULT_DMAMEM_OPS_RDWR, + __FB_DEFAULT_DEFERRED_OPS_RDWR(drm_fbdev_dma), DRM_FB_HELPER_DEFAULT_OPS, - __FB_DEFAULT_DMAMEM_OPS_DRAW, + __FB_DEFAULT_DEFERRED_OPS_DRAW(drm_fbdev_dma), .fb_mmap = drm_fbdev_dma_fb_mmap, .fb_destroy = drm_fbdev_dma_fb_destroy, }; @@ -98,10 +108,6 @@ static int drm_fbdev_dma_helper_fb_probe(struct drm_fb_helper *fb_helper, dma_obj = to_drm_gem_dma_obj(buffer->gem); fb = buffer->fb; - if (drm_WARN_ON(dev, fb->funcs->dirty)) { - ret = -ENODEV; /* damage handling not supported; use generic emulation */ - goto err_drm_client_buffer_delete; - } ret = drm_client_buffer_vmap(buffer, &map); if (ret) { @@ -112,7 +118,7 @@ static int drm_fbdev_dma_helper_fb_probe(struct drm_fb_helper *fb_helper, } fb_helper->buffer = buffer; - fb_helper->fb = buffer->fb; + fb_helper->fb = fb; info = drm_fb_helper_alloc_info(fb_helper); if (IS_ERR(info)) { @@ -133,8 +139,19 @@ static int drm_fbdev_dma_helper_fb_probe(struct drm_fb_helper *fb_helper, info->fix.smem_start = page_to_phys(virt_to_page(info->screen_buffer)); info->fix.smem_len = info->screen_size; + /* deferred I/O */ + fb_helper->fbdefio.delay = HZ / 20; + fb_helper->fbdefio.deferred_io = drm_fb_helper_deferred_io; + + info->fbdefio = &fb_helper->fbdefio; + ret = fb_deferred_io_init(info); + if (ret) + goto err_drm_fb_helper_release_info; + return 0; +err_drm_fb_helper_release_info: + drm_fb_helper_release_info(fb_helper); err_drm_client_buffer_vunmap: fb_helper->fb = NULL; fb_helper->buffer = NULL; @@ -144,8 +161,28 @@ static int drm_fbdev_dma_helper_fb_probe(struct drm_fb_helper *fb_helper, return ret; } +static int drm_fbdev_dma_helper_fb_dirty(struct drm_fb_helper *helper, + struct drm_clip_rect *clip) +{ + struct drm_device *dev = helper->dev; + int ret; + + /* Call damage handlers only if necessary */ + if (!(clip->x1 < clip->x2 && clip->y1 < clip->y2)) + return 0; + + if (helper->fb->funcs->dirty) { + ret = helper->fb->funcs->dirty(helper->fb, NULL, 0, 0, clip, 1); + if (drm_WARN_ONCE(dev, ret, "Dirty helper failed: ret=%d\n", ret)) + return ret; + } + + return 0; +} + static const struct drm_fb_helper_funcs drm_fbdev_dma_helper_funcs = { .fb_probe = drm_fbdev_dma_helper_fb_probe, + .fb_dirty = drm_fbdev_dma_helper_fb_dirty, }; /*