From patchwork Fri Mar 11 10:59:34 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Wang, Zhi A" X-Patchwork-Id: 8564811 Return-Path: X-Original-To: patchwork-intel-gfx@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id CD7DB9F6E4 for ; Fri, 11 Mar 2016 11:12:53 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id B1BD2201F4 for ; Fri, 11 Mar 2016 11:12:52 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id A694E20219 for ; Fri, 11 Mar 2016 11:12:51 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6078D6EA90; Fri, 11 Mar 2016 11:12:50 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by gabe.freedesktop.org (Postfix) with ESMTP id 5E5DF6E2A7 for ; Fri, 11 Mar 2016 11:10:52 +0000 (UTC) Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga102.jf.intel.com with ESMTP; 11 Mar 2016 03:10:53 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.24,320,1455004800"; d="scan'208";a="64211279" Received: from dev-inno.bj.intel.com ([10.238.135.69]) by fmsmga004.fm.intel.com with ESMTP; 11 Mar 2016 03:03:09 -0800 From: Zhi Wang To: intel-gfx@lists.freedesktop.org, igvt-g@lists.01.org Date: Fri, 11 Mar 2016 18:59:34 +0800 Message-Id: <1457693986-6892-4-git-send-email-zhi.a.wang@intel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1457693986-6892-1-git-send-email-zhi.a.wang@intel.com> References: <1457693986-6892-1-git-send-email-zhi.a.wang@intel.com> Cc: daniel.vetter@ffwll.ch, david.j.cowperthwaite@intel.com, zhiyuan.lv@intel.com Subject: [Intel-gfx] [RFCv3 03/15] drm/i915: Introduce host graphics memory partition for GVT-g 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-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Bing Niu This patch introduces host graphics memory partition when GVT-g is enabled. Under GVT-g, i915 host driver only owned limited graphics resources, others are managed by GVT-g resource allocator and kept for other vGPUs. v3: - Remove fence partition, will use i915 fence stealing in future.(Kevin) - Santinize GVT host gm kernel parameters. (Joonas) v2: - Address all coding-style comments from Joonas previously. - Fix errors and warnning reported by checkpatch.pl. (Joonas) - Move the graphs into the header files. (Daniel) Signed-off-by: Bing Niu Signed-off-by: Zhi Wang --- drivers/gpu/drm/i915/i915_drv.h | 22 ++++++++++++++++++++ drivers/gpu/drm/i915/i915_vgpu.c | 21 ++++++++++++++++---- drivers/gpu/drm/i915/intel_gvt.c | 43 ++++++++++++++++++++++++++++++++++++++++ drivers/gpu/drm/i915/intel_gvt.h | 2 ++ 4 files changed, 84 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 88f9041..972b4ce 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -1709,8 +1709,30 @@ struct i915_workarounds { u32 hw_whitelist_count[I915_NUM_RINGS]; }; +/* + * Under GVT-g, i915 host driver only owned limited graphics resources, + * others are managed by GVT-g resource allocator and kept for other vGPUs. + * + * For graphics memory space partition, a typical layout looks like: + * + * +-------+-----------------------+------+-----------------------+ + * |* Host | *GVT-g Resource |* Host| *GVT-g Resource | + * | Owned | Allocator Managed | Owned| Allocator Managed | + * | | | | | + * +---------------+-------+----------------------+-------+-------+ + * | | | | | | | | | + * | i915 | vm 1 | vm 2 | vm 3 | i915 | vm 1 | vm 2 | vm 3 | + * | | | | | | | | | + * +-------+-------+-------+--------------+-------+-------+-------+ + * | Aperture | Hidden | + * +-------------------------------+------------------------------+ + * | GGTT memory space | + * +--------------------------------------------------------------+ + */ struct i915_gvt { void *gvt_device; + u64 low_gm_size; + u64 high_gm_size; }; struct i915_virtual_gpu { diff --git a/drivers/gpu/drm/i915/i915_vgpu.c b/drivers/gpu/drm/i915/i915_vgpu.c index 836defe..5b364b4 100644 --- a/drivers/gpu/drm/i915/i915_vgpu.c +++ b/drivers/gpu/drm/i915/i915_vgpu.c @@ -194,10 +194,23 @@ int intel_vgt_balloon(struct drm_device *dev) if (!intel_vgpu_active(dev) && !intel_gvt_active(dev)) return 0; - mappable_base = I915_READ(vgtif_reg(avail_rs.mappable_gmadr.base)); - mappable_size = I915_READ(vgtif_reg(avail_rs.mappable_gmadr.size)); - unmappable_base = I915_READ(vgtif_reg(avail_rs.nonmappable_gmadr.base)); - unmappable_size = I915_READ(vgtif_reg(avail_rs.nonmappable_gmadr.size)); + if (intel_gvt_active(dev)) { + mappable_base = 0; + mappable_size = dev_priv->gvt.low_gm_size; + unmappable_base = dev_priv->gtt.mappable_end; + unmappable_size = dev_priv->gvt.high_gm_size; + } else if (intel_vgpu_active(dev)) { + mappable_base = I915_READ( + vgtif_reg(avail_rs.mappable_gmadr.base)); + mappable_size = I915_READ( + vgtif_reg(avail_rs.mappable_gmadr.size)); + unmappable_base = I915_READ( + vgtif_reg(avail_rs.nonmappable_gmadr.base)); + unmappable_size = I915_READ( + vgtif_reg(avail_rs.nonmappable_gmadr.size)); + } else { + return -ENODEV; + } mappable_end = mappable_base + mappable_size; unmappable_end = unmappable_base + unmappable_size; diff --git a/drivers/gpu/drm/i915/intel_gvt.c b/drivers/gpu/drm/i915/intel_gvt.c index a89b0ad..8efc1cb 100644 --- a/drivers/gpu/drm/i915/intel_gvt.c +++ b/drivers/gpu/drm/i915/intel_gvt.c @@ -43,6 +43,46 @@ struct gvt_kernel_params gvt = { module_param_named(gvt_enable, gvt.enable, bool, 0600); MODULE_PARM_DESC(gvt_enable, "Enable Intel GVT-g host support"); +/* i915.gvt_low_gm_size */ +module_param_named(gvt_low_gm_size, gvt.low_gm_size, charp, 0600); +MODULE_PARM_DESC(gvt_low_gm_size, "GVT low graphics memory size"); + +/* i915.gvt_high_gm_size */ +module_param_named(gvt_high_gm_size, gvt.high_gm_size, charp, 0600); +MODULE_PARM_DESC(gvt_high_gm_size, "GVT high graphics memory size"); + +#define KB(x) ((x) * 1024) +#define MB(x) (KB(x) * 1024) + +#define MAX_GVT_LOW_GM_SIZE MB(96) +#define MAX_GVT_HIGH_GM_SIZE MB(384) + +static void setup_gm_size(struct drm_i915_private *dev_priv) +{ + u64 low_gm_size, high_gm_size; + + low_gm_size = high_gm_size = 0; + + /* Try to parse kernel parameter first */ + if (gvt.low_gm_size) + low_gm_size = memparse(gvt.low_gm_size, NULL); + + if (gvt.high_gm_size) + high_gm_size = memparse(gvt.high_gm_size, NULL); + + if (!low_gm_size || low_gm_size > MAX_GVT_LOW_GM_SIZE) + low_gm_size = MAX_GVT_LOW_GM_SIZE; + + if (!high_gm_size || high_gm_size > MAX_GVT_HIGH_GM_SIZE) + high_gm_size = MAX_GVT_HIGH_GM_SIZE; + + dev_priv->gvt.low_gm_size = low_gm_size; + dev_priv->gvt.high_gm_size = high_gm_size; + + DRM_DEBUG_DRIVER("GVT low graphics memory size: %llx\n", low_gm_size); + DRM_DEBUG_DRIVER("GVT high graphics memory size: %llx\n", high_gm_size); +} + static bool is_supported_device(struct drm_device *dev) { struct drm_i915_private *dev_priv = to_i915(dev); @@ -52,6 +92,7 @@ static bool is_supported_device(struct drm_device *dev) return false; } + /** * intel_gvt_init - initialize GVT components at the beginning of i915 * driver loading. @@ -75,6 +116,8 @@ int intel_gvt_init(struct drm_device *dev) return 0; } + setup_gm_size(dev_priv); + dev_priv->gvt.gvt_device = gvt_create_device(dev); if (intel_gvt_active(dev)) DRM_DEBUG_DRIVER("GVT-g is running in host mode\n"); diff --git a/drivers/gpu/drm/i915/intel_gvt.h b/drivers/gpu/drm/i915/intel_gvt.h index 9be5a4f..2b98244 100644 --- a/drivers/gpu/drm/i915/intel_gvt.h +++ b/drivers/gpu/drm/i915/intel_gvt.h @@ -30,6 +30,8 @@ struct gvt_kernel_params { bool enable; + char *low_gm_size; + char *high_gm_size; }; extern struct gvt_kernel_params gvt;