From patchwork Thu Jun 13 07:30:39 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 10991339 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D35001398 for ; Thu, 13 Jun 2019 07:31:23 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BC42D28A18 for ; Thu, 13 Jun 2019 07:31:23 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id AF03D28B05; Thu, 13 Jun 2019 07:31:23 +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=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 0FCDF28A18 for ; Thu, 13 Jun 2019 07:31:23 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 9341889739; Thu, 13 Jun 2019 07:31:03 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mx1.suse.de (mx2.suse.de [195.135.220.15]) by gabe.freedesktop.org (Postfix) with ESMTPS id 137DF8970E for ; Thu, 13 Jun 2019 07:30:53 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id A9A88AF58; Thu, 13 Jun 2019 07:30:51 +0000 (UTC) From: Thomas Zimmermann To: kraxel@redhat.com, airlied@redhat.com, daniel@ffwll.ch, maarten.lankhorst@linux.intel.com, maxime.ripard@bootlin.com, sean@poorly.run, sam@ravnborg.org, dri-devel@lists.freedesktop.org Subject: [PATCH v3 7/9] drm/mgag200: Rewrite cursor handling Date: Thu, 13 Jun 2019 09:30:39 +0200 Message-Id: <20190613073041.29350-8-tzimmermann@suse.de> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190613073041.29350-1-tzimmermann@suse.de> References: <20190613073041.29350-1-tzimmermann@suse.de> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Thomas Zimmermann Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP The cursor handling in mgag200 is complicated to understand. It touches a number of different BOs, but doesn't really use all of them. Rewriting the cursor update reduces the amount of cursor state. There are two BOs for double-buffered HW updates. The source BO updates the one that is currently not displayed and then switches buffers. Explicit BO locking has been removed from the code. BOs are simply pinned and unpinned in video RAM. v2: * pin cursor BOs to current location Signed-off-by: Thomas Zimmermann Acked-by: Gerd Hoffmann --- drivers/gpu/drm/mgag200/mgag200_cursor.c | 165 ++++++++++------------- drivers/gpu/drm/mgag200/mgag200_drv.h | 3 - drivers/gpu/drm/mgag200/mgag200_main.c | 4 +- 3 files changed, 69 insertions(+), 103 deletions(-) diff --git a/drivers/gpu/drm/mgag200/mgag200_cursor.c b/drivers/gpu/drm/mgag200/mgag200_cursor.c index de94a650077b..f0c61a92351c 100644 --- a/drivers/gpu/drm/mgag200/mgag200_cursor.c +++ b/drivers/gpu/drm/mgag200/mgag200_cursor.c @@ -19,10 +19,9 @@ static void mga_hide_cursor(struct mga_device *mdev) { WREG8(MGA_CURPOSXL, 0); WREG8(MGA_CURPOSXH, 0); - if (mdev->cursor.pixels_1->pin_count) - drm_gem_vram_unpin_locked(mdev->cursor.pixels_1); - if (mdev->cursor.pixels_2->pin_count) - drm_gem_vram_unpin_locked(mdev->cursor.pixels_2); + if (mdev->cursor.pixels_current) + drm_gem_vram_unpin(mdev->cursor.pixels_current); + mdev->cursor.pixels_current = NULL; } int mga_crtc_cursor_set(struct drm_crtc *crtc, @@ -36,7 +35,7 @@ int mga_crtc_cursor_set(struct drm_crtc *crtc, struct drm_gem_vram_object *pixels_1 = mdev->cursor.pixels_1; struct drm_gem_vram_object *pixels_2 = mdev->cursor.pixels_2; struct drm_gem_vram_object *pixels_current = mdev->cursor.pixels_current; - struct drm_gem_vram_object *pixels_prev = mdev->cursor.pixels_prev; + struct drm_gem_vram_object *pixels_next; struct drm_gem_object *obj; struct drm_gem_vram_object *gbo = NULL; int ret = 0; @@ -49,6 +48,7 @@ int mga_crtc_cursor_set(struct drm_crtc *crtc, bool found = false; int colour_count = 0; s64 gpu_addr; + u64 dst_gpu; u8 reg_index; u8 this_row[48]; @@ -58,80 +58,66 @@ int mga_crtc_cursor_set(struct drm_crtc *crtc, return -ENOTSUPP; /* Didn't allocate space for cursors */ } - if ((width != 64 || height != 64) && handle) { - WREG8(MGA_CURPOSXL, 0); - WREG8(MGA_CURPOSXH, 0); - return -EINVAL; + if (WARN_ON(pixels_current && + pixels_1 != pixels_current && + pixels_2 != pixels_current)) { + return -ENOTSUPP; /* inconsistent state */ } - BUG_ON(pixels_1 != pixels_current && pixels_1 != pixels_prev); - BUG_ON(pixels_2 != pixels_current && pixels_2 != pixels_prev); - BUG_ON(pixels_current == pixels_prev); - if (!handle || !file_priv) { mga_hide_cursor(mdev); return 0; } - obj = drm_gem_object_lookup(file_priv, handle); - if (!obj) - return -ENOENT; - - ret = drm_gem_vram_lock(pixels_1, true); - if (ret) { + if (width != 64 || height != 64) { WREG8(MGA_CURPOSXL, 0); WREG8(MGA_CURPOSXH, 0); - goto out_unref; - } - ret = drm_gem_vram_lock(pixels_2, true); - if (ret) { - WREG8(MGA_CURPOSXL, 0); - WREG8(MGA_CURPOSXH, 0); - drm_gem_vram_unlock(pixels_1); - goto out_unlock1; + return -EINVAL; } - /* Move cursor buffers into VRAM if they aren't already */ - if (!pixels_1->pin_count) { - ret = drm_gem_vram_pin_locked(pixels_1, - DRM_GEM_VRAM_PL_FLAG_VRAM); - if (ret) - goto out1; - gpu_addr = drm_gem_vram_offset(pixels_1); - if (gpu_addr < 0) { - drm_gem_vram_unpin_locked(pixels_1); - goto out1; - } - mdev->cursor.pixels_1_gpu_addr = gpu_addr; - } - if (!pixels_2->pin_count) { - ret = drm_gem_vram_pin_locked(pixels_2, - DRM_GEM_VRAM_PL_FLAG_VRAM); - if (ret) { - drm_gem_vram_unpin_locked(pixels_1); - goto out1; - } - gpu_addr = drm_gem_vram_offset(pixels_2); - if (gpu_addr < 0) { - drm_gem_vram_unpin_locked(pixels_1); - drm_gem_vram_unpin_locked(pixels_2); - goto out1; - } - mdev->cursor.pixels_2_gpu_addr = gpu_addr; - } + if (pixels_current == pixels_1) + pixels_next = pixels_2; + else + pixels_next = pixels_1; + obj = drm_gem_object_lookup(file_priv, handle); + if (!obj) + return -ENOENT; gbo = drm_gem_vram_of_gem(obj); - ret = drm_gem_vram_lock(gbo, true); + ret = drm_gem_vram_pin(gbo, 0); if (ret) { dev_err(&dev->pdev->dev, "failed to lock user bo\n"); - goto out1; + goto err_drm_gem_object_put_unlocked; } src = drm_gem_vram_kmap(gbo, true, NULL); if (IS_ERR(src)) { ret = PTR_ERR(src); - dev_err(&dev->pdev->dev, "failed to kmap user buffer updates\n"); - goto out2; + dev_err(&dev->pdev->dev, + "failed to kmap user buffer updates\n"); + goto err_drm_gem_vram_unpin_src; + } + + /* Pin and map up-coming buffer to write colour indices */ + ret = drm_gem_vram_pin(pixels_next, 0); + if (ret) + dev_err(&dev->pdev->dev, + "failed to pin cursor buffer: %d\n", ret); + goto err_drm_gem_vram_kunmap_src; + dst = drm_gem_vram_kmap(pixels_next, true, NULL); + if (IS_ERR(dst)) { + ret = PTR_ERR(dst); + dev_err(&dev->pdev->dev, + "failed to kmap cursor updates: %d\n", ret); + goto err_drm_gem_vram_unpin_dst; + } + gpu_addr = drm_gem_vram_offset(pixels_2); + if (gpu_addr < 0) { + ret = (int)gpu_addr; + dev_err(&dev->pdev->dev, + "failed to get cursor scanout address: %d\n", ret); + goto err_drm_gem_vram_kunmap_dst; } + dst_gpu = (u64)gpu_addr; memset(&colour_set[0], 0, sizeof(uint32_t)*16); /* width*height*4 = 16384 */ @@ -146,7 +132,7 @@ int mga_crtc_cursor_set(struct drm_crtc *crtc, warn_transparent = false; /* Only tell the user once. */ } ret = -EINVAL; - goto out3; + goto err_drm_gem_vram_kunmap_dst; } /* Don't need to store transparent pixels as colours */ if (this_colour>>24 == 0x0) @@ -168,7 +154,7 @@ int mga_crtc_cursor_set(struct drm_crtc *crtc, warn_palette = false; /* Only tell the user once. */ } ret = -EINVAL; - goto out3; + goto err_drm_gem_vram_kunmap_dst; } *next_space = this_colour; next_space++; @@ -187,14 +173,6 @@ int mga_crtc_cursor_set(struct drm_crtc *crtc, BUG_ON((colour_set[i]>>24 & 0xff) != 0xff); } - /* Map up-coming buffer to write colour indices */ - dst = drm_gem_vram_kmap(pixels_prev, true, NULL); - if (IS_ERR(dst)) { - ret = PTR_ERR(dst); - dev_err(&dev->pdev->dev, "failed to kmap cursor updates\n"); - goto out3; - } - /* now write colour indices into hardware cursor buffer */ for (row = 0; row < 64; row++) { memset(&this_row[0], 0, 48); @@ -221,42 +199,35 @@ int mga_crtc_cursor_set(struct drm_crtc *crtc, } /* Program gpu address of cursor buffer */ - if (pixels_prev == pixels_1) - gpu_addr = mdev->cursor.pixels_1_gpu_addr; - else - gpu_addr = mdev->cursor.pixels_2_gpu_addr; - WREG_DAC(MGA1064_CURSOR_BASE_ADR_LOW, (u8)((gpu_addr>>10) & 0xff)); - WREG_DAC(MGA1064_CURSOR_BASE_ADR_HI, (u8)((gpu_addr>>18) & 0x3f)); + WREG_DAC(MGA1064_CURSOR_BASE_ADR_LOW, (u8)((dst_gpu>>10) & 0xff)); + WREG_DAC(MGA1064_CURSOR_BASE_ADR_HI, (u8)((dst_gpu>>18) & 0x3f)); /* Adjust cursor control register to turn on the cursor */ WREG_DAC(MGA1064_CURSOR_CTL, 4); /* 16-colour palletized cursor mode */ - /* Now swap internal buffer pointers */ - if (mdev->cursor.pixels_1 == mdev->cursor.pixels_prev) { - mdev->cursor.pixels_prev = mdev->cursor.pixels_2; - mdev->cursor.pixels_current = mdev->cursor.pixels_1; - } else if (mdev->cursor.pixels_1 == mdev->cursor.pixels_current) { - mdev->cursor.pixels_prev = mdev->cursor.pixels_1; - mdev->cursor.pixels_current = mdev->cursor.pixels_2; - } else { - BUG(); - } - ret = 0; + /* Now update internal buffer pointers */ + if (pixels_current) + drm_gem_vram_unpin(pixels_current); + mdev->cursor.pixels_current = pixels_next; - drm_gem_vram_kunmap(pixels_prev); - out3: + drm_gem_vram_kunmap(pixels_next); + drm_gem_vram_unpin(pixels_next); drm_gem_vram_kunmap(gbo); - out2: - drm_gem_vram_unlock(gbo); - out1: - if (ret) - mga_hide_cursor(mdev); - drm_gem_vram_unlock(pixels_1); -out_unlock1: - drm_gem_vram_unlock(pixels_2); -out_unref: + drm_gem_vram_unpin(gbo); drm_gem_object_put_unlocked(obj); + return 0; + +err_drm_gem_vram_kunmap_dst: + drm_gem_vram_kunmap(pixels_next); +err_drm_gem_vram_unpin_dst: + drm_gem_vram_unpin(pixels_next); +err_drm_gem_vram_kunmap_src: + drm_gem_vram_kunmap(gbo); +err_drm_gem_vram_unpin_src: + drm_gem_vram_unpin(gbo); +err_drm_gem_object_put_unlocked: + drm_gem_object_put_unlocked(obj); return ret; } diff --git a/drivers/gpu/drm/mgag200/mgag200_drv.h b/drivers/gpu/drm/mgag200/mgag200_drv.h index b8f66de0d797..c47671ce6c48 100644 --- a/drivers/gpu/drm/mgag200/mgag200_drv.h +++ b/drivers/gpu/drm/mgag200/mgag200_drv.h @@ -155,11 +155,8 @@ struct mga_cursor { */ struct drm_gem_vram_object *pixels_1; struct drm_gem_vram_object *pixels_2; - u64 pixels_1_gpu_addr, pixels_2_gpu_addr; /* The currently displayed icon, this points to one of pixels_1, or pixels_2 */ struct drm_gem_vram_object *pixels_current; - /* The previously displayed icon */ - struct drm_gem_vram_object *pixels_prev; }; struct mga_mc { diff --git a/drivers/gpu/drm/mgag200/mgag200_main.c b/drivers/gpu/drm/mgag200/mgag200_main.c index bc95c3a18824..dd61ccc5af5c 100644 --- a/drivers/gpu/drm/mgag200/mgag200_main.c +++ b/drivers/gpu/drm/mgag200/mgag200_main.c @@ -238,10 +238,8 @@ int mgag200_driver_load(struct drm_device *dev, unsigned long flags) mdev->cursor.pixels_2 = NULL; dev_warn(&dev->pdev->dev, "Could not allocate space for cursors. Not doing hardware cursors.\n"); - } else { - mdev->cursor.pixels_current = mdev->cursor.pixels_1; - mdev->cursor.pixels_prev = mdev->cursor.pixels_2; } + mdev->cursor.pixels_current = NULL; return 0;