From patchwork Tue Mar 7 14:46:51 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nirmoy Das X-Patchwork-Id: 13163843 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 007A8C678D4 for ; Tue, 7 Mar 2023 14:47:05 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0A5D110E4C7; Tue, 7 Mar 2023 14:47:02 +0000 (UTC) Received: from mga06.intel.com (mga06b.intel.com [134.134.136.31]) by gabe.freedesktop.org (Postfix) with ESMTPS id 0178310E4C8 for ; Tue, 7 Mar 2023 14:46:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1678200419; x=1709736419; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=NtYi5ExUEsySDXfPChRzxSw4KfMzwNt5eG6BXGhUQKQ=; b=TpCbsIyIuuMPURxFyFvD3+y7d6tkq16J3Agg1YPf1oQy2zFG8sdeIuX9 0PtQGYJDqyEdJ+QTmqVQxIhswCHDjjbxhqIji5Wt+xpHcdx3o/kqbJPC7 /kdja3q2AVZdLuU+CFVDPww/Ej1XhWlOprvI4IX3ff2YKqD58xA9wjydn ftGFTjwfBY1QGC3a5LbzimTLeAjC1VKnNHn2/rGtbQVdaCoxozR2HiG3K CA5yyESH3/qXzemJDG5TyQXSLrkPB2zKl9XvkRGYADWJXJm+Ae7EOXZ4w y2HAWCTXOPtB2fV/XlbAZOyXDs6OocyeEngXYaPu8eLnQr2J203PGk57Y Q==; X-IronPort-AV: E=McAfee;i="6500,9779,10642"; a="398444227" X-IronPort-AV: E=Sophos;i="5.98,241,1673942400"; d="scan'208";a="398444227" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Mar 2023 06:46:59 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6500,9779,10642"; a="740748673" X-IronPort-AV: E=Sophos;i="5.98,241,1673942400"; d="scan'208";a="740748673" Received: from nirmoyda-desk.igk.intel.com ([10.102.42.231]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Mar 2023 06:46:58 -0800 From: Nirmoy Das To: intel-gfx@lists.freedesktop.org Date: Tue, 7 Mar 2023 15:46:51 +0100 Message-Id: <20230307144652.17595-1-nirmoy.das@intel.com> X-Mailer: git-send-email 2.39.0 MIME-Version: 1.0 Organization: Intel Deutschland GmbH, Registered Address: Am Campeon 10, 85579 Neubiberg, Germany, Commercial Register: Amtsgericht Muenchen HRB 186928 Subject: [Intel-gfx] [RFC PATCH 1/2] drm/i915: Add a function to mmap framebuffer obj X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: matthew.auld@intel.com, Nirmoy Das Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Implement i915_gem_fb_mmap() to enable fb_ops.fb_mmap() callback for i915's framebuffer objects. Signed-off-by: Nirmoy Das --- drivers/gpu/drm/i915/gem/i915_gem_mman.c | 121 ++++++++++++++--------- drivers/gpu/drm/i915/gem/i915_gem_mman.h | 2 +- 2 files changed, 77 insertions(+), 46 deletions(-) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_mman.c b/drivers/gpu/drm/i915/gem/i915_gem_mman.c index d3c1dee16af2..373ff94ed616 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_mman.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_mman.c @@ -927,53 +927,15 @@ static struct file *mmap_singleton(struct drm_i915_private *i915) return file; } -/* - * This overcomes the limitation in drm_gem_mmap's assignment of a - * drm_gem_object as the vma->vm_private_data. Since we need to - * be able to resolve multiple mmap offsets which could be tied - * to a single gem object. - */ -int i915_gem_mmap(struct file *filp, struct vm_area_struct *vma) +static int +i915_gem_object_mmap(struct drm_i915_gem_object *obj, + struct i915_mmap_offset *mmo, + struct vm_area_struct *vma) { - struct drm_vma_offset_node *node; - struct drm_file *priv = filp->private_data; - struct drm_device *dev = priv->minor->dev; - struct drm_i915_gem_object *obj = NULL; - struct i915_mmap_offset *mmo = NULL; + struct drm_i915_private *i915 = to_i915(obj->base.dev); + struct drm_device *dev = &i915->drm; struct file *anon; - if (drm_dev_is_unplugged(dev)) - return -ENODEV; - - rcu_read_lock(); - drm_vma_offset_lock_lookup(dev->vma_offset_manager); - node = drm_vma_offset_exact_lookup_locked(dev->vma_offset_manager, - vma->vm_pgoff, - vma_pages(vma)); - if (node && drm_vma_node_is_allowed(node, priv)) { - /* - * Skip 0-refcnted objects as it is in the process of being - * destroyed and will be invalid when the vma manager lock - * is released. - */ - if (!node->driver_private) { - mmo = container_of(node, struct i915_mmap_offset, vma_node); - obj = i915_gem_object_get_rcu(mmo->obj); - - GEM_BUG_ON(obj && obj->ops->mmap_ops); - } else { - obj = i915_gem_object_get_rcu - (container_of(node, struct drm_i915_gem_object, - base.vma_node)); - - GEM_BUG_ON(obj && !obj->ops->mmap_ops); - } - } - drm_vma_offset_unlock_lookup(dev->vma_offset_manager); - rcu_read_unlock(); - if (!obj) - return node ? -EACCES : -EINVAL; - if (i915_gem_object_is_readonly(obj)) { if (vma->vm_flags & VM_WRITE) { i915_gem_object_put(obj); @@ -1005,7 +967,7 @@ int i915_gem_mmap(struct file *filp, struct vm_area_struct *vma) if (obj->ops->mmap_ops) { vma->vm_page_prot = pgprot_decrypted(vm_get_page_prot(vma->vm_flags)); vma->vm_ops = obj->ops->mmap_ops; - vma->vm_private_data = node->driver_private; + vma->vm_private_data = obj->base.vma_node.driver_private; return 0; } @@ -1043,6 +1005,75 @@ int i915_gem_mmap(struct file *filp, struct vm_area_struct *vma) return 0; } +/* + * This overcomes the limitation in drm_gem_mmap's assignment of a + * drm_gem_object as the vma->vm_private_data. Since we need to + * be able to resolve multiple mmap offsets which could be tied + * to a single gem object. + */ +int i915_gem_mmap(struct file *filp, struct vm_area_struct *vma) +{ + struct drm_vma_offset_node *node; + struct drm_file *priv = filp->private_data; + struct drm_device *dev = priv->minor->dev; + struct drm_i915_gem_object *obj = NULL; + struct i915_mmap_offset *mmo = NULL; + + if (drm_dev_is_unplugged(dev)) + return -ENODEV; + + rcu_read_lock(); + drm_vma_offset_lock_lookup(dev->vma_offset_manager); + node = drm_vma_offset_exact_lookup_locked(dev->vma_offset_manager, + vma->vm_pgoff, + vma_pages(vma)); + if (node && drm_vma_node_is_allowed(node, priv)) { + /* + * Skip 0-refcnted objects as it is in the process of being + * destroyed and will be invalid when the vma manager lock + * is released. + */ + if (!node->driver_private) { + mmo = container_of(node, struct i915_mmap_offset, vma_node); + obj = i915_gem_object_get_rcu(mmo->obj); + + GEM_BUG_ON(obj && obj->ops->mmap_ops); + } else { + obj = i915_gem_object_get_rcu + (container_of(node, struct drm_i915_gem_object, + base.vma_node)); + + GEM_BUG_ON(obj && !obj->ops->mmap_ops); + } + } + drm_vma_offset_unlock_lookup(dev->vma_offset_manager); + rcu_read_unlock(); + if (!obj) + return node ? -EACCES : -EINVAL; + + return i915_gem_object_mmap(obj, mmo, vma); +} + +int i915_gem_fb_mmap(struct drm_i915_gem_object *obj, struct vm_area_struct *vma) +{ + struct drm_i915_private *i915 = to_i915(obj->base.dev); + struct drm_device *dev = &i915->drm; + struct i915_mmap_offset *mmo = NULL; + enum i915_mmap_type mmap_type; + struct i915_ggtt *ggtt = to_gt(i915)->ggtt; + + if (drm_dev_is_unplugged(dev)) + return -ENODEV; + + mmap_type = i915_ggtt_has_aperture(ggtt) ? I915_MMAP_TYPE_GTT : I915_MMAP_TYPE_WC; + mmo = mmap_offset_attach(obj, mmap_type, NULL); + if (!mmo) + return -ENODEV; + + obj = i915_gem_object_get(mmo->obj); + return i915_gem_object_mmap(obj, mmo, vma); +} + #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST) #include "selftests/i915_gem_mman.c" #endif diff --git a/drivers/gpu/drm/i915/gem/i915_gem_mman.h b/drivers/gpu/drm/i915/gem/i915_gem_mman.h index 1fa91b3033b3..196417fd0f5c 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_mman.h +++ b/drivers/gpu/drm/i915/gem/i915_gem_mman.h @@ -29,5 +29,5 @@ void i915_gem_object_release_mmap_gtt(struct drm_i915_gem_object *obj); void i915_gem_object_runtime_pm_release_mmap_offset(struct drm_i915_gem_object *obj); void i915_gem_object_release_mmap_offset(struct drm_i915_gem_object *obj); - +int i915_gem_fb_mmap(struct drm_i915_gem_object *obj, struct vm_area_struct *vma); #endif From patchwork Tue Mar 7 14:46:52 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nirmoy Das X-Patchwork-Id: 13163844 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 47F41C6FD1A for ; Tue, 7 Mar 2023 14:47:07 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6E19E10E4CC; Tue, 7 Mar 2023 14:47:03 +0000 (UTC) Received: from mga06.intel.com (mga06b.intel.com [134.134.136.31]) by gabe.freedesktop.org (Postfix) with ESMTPS id C7F2E10E4C7 for ; Tue, 7 Mar 2023 14:47:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1678200420; x=1709736420; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=y6nZuNSe6JJw6StAUePz5G9q9pXP+5YIZTT3TFS2s9g=; b=IMQQJ4VCVl6uhkNENVnkKQt5QSiutPeQGUXVFG6Ebsocn3Sh62oiPamx GxErFE5Sb5/C/XX0iR6E08iO/QlTHYflDEyRtPQk9pWYp0Nqlvf/Btqxl 1w4YluOApNZ5pyW44AdiWgoVfOK3CQAPEo1/sWPmCTkaQYCTWW4wU/4hf oaRJnUdwRDnDSmncdGjDXMLB049kW3KKNQ0WcHpbhj/hgtvtQyoZugz6K bJfKJRpfSPn6+UHV9sFgd3posjsYXjYeQxmqeqp+tXqWV2KCQfTVDc1u8 nBy4pHWenUsE9yIVuy8hK9d1u6Dbo8dB7+oKRpdU34fTIBqilNq0pipHs A==; X-IronPort-AV: E=McAfee;i="6500,9779,10642"; a="398444236" X-IronPort-AV: E=Sophos;i="5.98,241,1673942400"; d="scan'208";a="398444236" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Mar 2023 06:47:00 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6500,9779,10642"; a="740748689" X-IronPort-AV: E=Sophos;i="5.98,241,1673942400"; d="scan'208";a="740748689" Received: from nirmoyda-desk.igk.intel.com ([10.102.42.231]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Mar 2023 06:46:59 -0800 From: Nirmoy Das To: intel-gfx@lists.freedesktop.org Date: Tue, 7 Mar 2023 15:46:52 +0100 Message-Id: <20230307144652.17595-2-nirmoy.das@intel.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230307144652.17595-1-nirmoy.das@intel.com> References: <20230307144652.17595-1-nirmoy.das@intel.com> MIME-Version: 1.0 Organization: Intel Deutschland GmbH, Registered Address: Am Campeon 10, 85579 Neubiberg, Germany, Commercial Register: Amtsgericht Muenchen HRB 186928 Subject: [Intel-gfx] [RFC PATCH 2/2] drm/i915/display: Implement fb_mmap callback function X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: matthew.auld@intel.com, Nirmoy Das Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" If stolen memory allocation fails for fbdev, the driver will fallback to system memory. Calculation of smem_start is wrong for such framebuffer objs if the platform comes with no gmadr or no aperture. Solve this by adding fb_mmap callback which will use GTT if aperture is available otherwise will use cpu to access the framebuffer. Signed-off-by: Nirmoy Das --- drivers/gpu/drm/i915/display/intel_fbdev.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_fbdev.c b/drivers/gpu/drm/i915/display/intel_fbdev.c index 3659350061a7..67427d020bd3 100644 --- a/drivers/gpu/drm/i915/display/intel_fbdev.c +++ b/drivers/gpu/drm/i915/display/intel_fbdev.c @@ -40,8 +40,10 @@ #include #include #include +#include #include "gem/i915_gem_lmem.h" +#include "gem/i915_gem_mman.h" #include "i915_drv.h" #include "intel_display_types.h" @@ -120,6 +122,16 @@ static int intel_fbdev_pan_display(struct fb_var_screeninfo *var, return ret; } +#define to_intel_fbdev(x) container_of(x, struct intel_fbdev, helper) +static int intel_fbdev_mmap(struct fb_info *info, struct vm_area_struct *vma) +{ + struct intel_fbdev *fbdev = to_intel_fbdev(info->par); + struct drm_gem_object *bo = drm_gem_fb_get_obj(&fbdev->fb->base, 0); + struct drm_i915_gem_object *obj = to_intel_bo(bo); + + return i915_gem_fb_mmap(obj, vma); +} + static const struct fb_ops intelfb_ops = { .owner = THIS_MODULE, DRM_FB_HELPER_DEFAULT_OPS, @@ -131,6 +143,7 @@ static const struct fb_ops intelfb_ops = { .fb_imageblit = drm_fb_helper_cfb_imageblit, .fb_pan_display = intel_fbdev_pan_display, .fb_blank = intel_fbdev_blank, + .fb_mmap = intel_fbdev_mmap, }; static int intelfb_alloc(struct drm_fb_helper *helper,