From patchwork Mon Aug 14 07:41:39 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhenyu Wang X-Patchwork-Id: 9898299 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id B8979602BA for ; Mon, 14 Aug 2017 07:42:16 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id AA7F128511 for ; Mon, 14 Aug 2017 07:42:16 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9E2D328536; Mon, 14 Aug 2017 07:42:16 +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=-4.2 required=2.0 tests=BAYES_00, 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 01A6B28511 for ; Mon, 14 Aug 2017 07:42:15 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id CBFC66E0EC; Mon, 14 Aug 2017 07:41:14 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by gabe.freedesktop.org (Postfix) with ESMTPS id D6E7F6E0E5; Mon, 14 Aug 2017 07:41:11 +0000 (UTC) Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 14 Aug 2017 00:41:11 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos; i="5.41,372,1498546800"; d="scan'208"; a="1162349850" Received: from debian-skl.sh.intel.com ([10.239.13.114]) by orsmga001.jf.intel.com with ESMTP; 14 Aug 2017 00:41:10 -0700 From: Zhenyu Wang To: intel-gfx@lists.freedesktop.org Date: Mon, 14 Aug 2017 15:41:39 +0800 Message-Id: <20170814074140.23151-3-zhenyuw@linux.intel.com> X-Mailer: git-send-email 2.14.0 In-Reply-To: <20170814074140.23151-1-zhenyuw@linux.intel.com> References: <20170814074140.23151-1-zhenyuw@linux.intel.com> Cc: intel-gvt-dev@lists.freedesktop.org Subject: [Intel-gfx] [PATCH v10 2/3] drm/i915: Enable guest i915 full ppgtt functionality X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP From: Tina Zhang Enable the guest i915 full ppgtt functionality when host can provide this capability. vgt_caps is introduced to guest i915 driver to get the vgpu capabilities from the device model. VGT_CPAS_FULL_PPGTT is one of the capabilities type to let guest i915 dirver know that the guest i915 full ppgtt is supported by device model. Notice that the minor version of pvinfo isn't bumped because of this vgt_caps introduction, due to older guest would be broken by simply increasing the pvinfo version. Although the pvinfo minor version doesn't increase, the compatibility won't be blocked. The compatibility is ensured by checking the value of caps field in pvinfo. Zero means no full ppgtt support and BIT(2) means this feature is provided. Changes since v1: - Use u32 instead of uint32_t (Joonas) - Move VGT_CAPS_FULL_PPGTT introduction to this patch and use #define instead of enum (Joonas) - Rewrite the vgpu full ppgtt capability checking logic. (Joonas) - Some coding style refine. (Joonas) Changes since v2: - Divide the whole patch set into two separate patch series, with one patch in i915 side to check guest i915 full ppgtt capability and enable it when this capability is supported by the device model, and the other one in gvt side which fixs the blocking issue and enables the device model to provide the capability to guest. And this patch focuses on guest i915 side. (Joonas) - Change the title from "introduce vgt_caps to pvinfo" to "Enable guest i915 full ppgtt functionality". (Tina) Change since v3: - Add some comments about pvinfo caps and version. (Joonas) Change since v4: - Tested by Tina Zhang. Change since v5: - Add limitation about supporting 32bit full ppgtt. Change since v6: - Change the fallback to 48bit full ppgtt if i915.ppgtt_enable=2. (Zhenyu) Change in v9: - Remove the fixme comment due to no plan for 32bit full ppgtt support. (Zhenyu) - Reorder the patch-set to fix compiling issue with git-bisect. (Zhenyu) - Add print log when forcing guest 48bit full ppgtt. (Zhenyu) v10: - Update against Joonas's has_full_ppgtt and has_full_48bit_ppgtt disconnect change. (Zhenyu) Reviewed-by: Joonas Lahtinen # in v2 Cc: Joonas Lahtinen Cc: Tina Zhang Signed-off-by: Tina Zhang Signed-off-by: Zhenyu Wang --- drivers/gpu/drm/i915/i915_drv.h | 1 + drivers/gpu/drm/i915/i915_gem_gtt.c | 4 ++-- drivers/gpu/drm/i915/i915_pvinfo.h | 8 +++++++- drivers/gpu/drm/i915/i915_vgpu.c | 7 +++++++ drivers/gpu/drm/i915/i915_vgpu.h | 3 +++ 5 files changed, 20 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index d63645a521c4..c38f46fd1fba 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -1902,6 +1902,7 @@ struct i915_workarounds { struct i915_virtual_gpu { bool active; + u32 caps; }; /* used in computing the new watermarks state */ diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c index a5eada1b93c5..ef1881e256f4 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -144,9 +144,9 @@ int intel_sanitize_enable_ppgtt(struct drm_i915_private *dev_priv, has_full_48bit_ppgtt = dev_priv->info.has_full_48bit_ppgtt; if (intel_vgpu_active(dev_priv)) { - /* emulation is too hard */ + /* GVT-g has no support for 32bit ppgtt */ has_full_ppgtt = false; - has_full_48bit_ppgtt = false; + has_full_48bit_ppgtt = intel_vgpu_has_full_48bit_ppgtt(dev_priv); } if (!has_aliasing_ppgtt) diff --git a/drivers/gpu/drm/i915/i915_pvinfo.h b/drivers/gpu/drm/i915/i915_pvinfo.h index 2cfe96d3e5d1..0679a58cdbae 100644 --- a/drivers/gpu/drm/i915/i915_pvinfo.h +++ b/drivers/gpu/drm/i915/i915_pvinfo.h @@ -49,12 +49,18 @@ enum vgt_g2v_type { VGT_G2V_MAX, }; +/* + * VGT capabilities type + */ +#define VGT_CAPS_FULL_48BIT_PPGTT BIT(2) + struct vgt_if { u64 magic; /* VGT_MAGIC */ u16 version_major; u16 version_minor; u32 vgt_id; /* ID of vGT instance */ - u32 rsv1[12]; /* pad to offset 0x40 */ + u32 vgt_caps; /* VGT capabilities */ + u32 rsv1[11]; /* pad to offset 0x40 */ /* * Data structure to describe the balooning info of resources. * Each VM can only have one portion of continuous area for now. diff --git a/drivers/gpu/drm/i915/i915_vgpu.c b/drivers/gpu/drm/i915/i915_vgpu.c index cf7a958e4d3c..5fe9f3f39467 100644 --- a/drivers/gpu/drm/i915/i915_vgpu.c +++ b/drivers/gpu/drm/i915/i915_vgpu.c @@ -75,10 +75,17 @@ void i915_check_vgpu(struct drm_i915_private *dev_priv) return; } + dev_priv->vgpu.caps = __raw_i915_read32(dev_priv, vgtif_reg(vgt_caps)); + dev_priv->vgpu.active = true; DRM_INFO("Virtual GPU for Intel GVT-g detected.\n"); } +bool intel_vgpu_has_full_48bit_ppgtt(struct drm_i915_private *dev_priv) +{ + return dev_priv->vgpu.caps & VGT_CAPS_FULL_48BIT_PPGTT; +} + struct _balloon_info_ { /* * There are up to 2 regions per mappable/unmappable graphic diff --git a/drivers/gpu/drm/i915/i915_vgpu.h b/drivers/gpu/drm/i915/i915_vgpu.h index 3c3b2d24e830..b72bd2956b70 100644 --- a/drivers/gpu/drm/i915/i915_vgpu.h +++ b/drivers/gpu/drm/i915/i915_vgpu.h @@ -27,6 +27,9 @@ #include "i915_pvinfo.h" void i915_check_vgpu(struct drm_i915_private *dev_priv); + +bool intel_vgpu_has_full_48bit_ppgtt(struct drm_i915_private *dev_priv); + int intel_vgt_balloon(struct drm_i915_private *dev_priv); void intel_vgt_deballoon(struct drm_i915_private *dev_priv);