From ff8f797557c73f1f191866a013b61a7286330021 Mon Sep 17 00:00:00 2001 From: Weinan Li Date: Wed, 31 May 2017 10:35:52 +0800 Subject: [PATCH] drm/i915: return the correct usable aperture size under gvt environment I915_GEM_GET_APERTURE ioctl is used to probe aperture size from userspace. In gvt environment, each vm only use the ballooned part of aperture, so we should return the correct available aperture size exclude the reserved part by balloon. v2: add 'reserved' in struct i915_address_space to record the reserved size in ggtt (Chris) v3: remain aper_size as total, adjust aper_available_size exclude reserved and pinned. UMD driver need to adjust the max allocation size according to the available aperture size but not total size. KMD return the correct usable aperture size any time (Chris, Joonas) v4: decrease reserved in deballoon (Joonas) v5: add onion teardown in balloon, add vgt_deballoon_space (Joonas) v6: change title name (Zhenyu) v7: code style refine (Joonas) Suggested-by: Chris Wilson Suggested-by: Joonas Lahtinen Cc: Chris Wilson Cc: Joonas Lahtinen Cc: Zhenyu Wang Signed-off-by: Weinan Li Link: http://patchwork.freedesktop.org/patch/msgid/1496198152-14175-1-git-send-email-weinan.z.li@intel.com Reviewed-by: Joonas Lahtinen Signed-off-by: Chris Wilson --- drivers/gpu/drm/i915/i915_gem.c | 4 +-- drivers/gpu/drm/i915/i915_gem_gtt.h | 1 + drivers/gpu/drm/i915/i915_vgpu.c | 44 ++++++++++++++++++++--------- 3 files changed, 34 insertions(+), 15 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 7b676fd1f075..aff449807399 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -143,9 +143,9 @@ i915_gem_get_aperture_ioctl(struct drm_device *dev, void *data, struct i915_ggtt *ggtt = &dev_priv->ggtt; struct drm_i915_gem_get_aperture *args = data; struct i915_vma *vma; - size_t pinned; + u64 pinned; - pinned = 0; + pinned = ggtt->base.reserved; mutex_lock(&dev->struct_mutex); list_for_each_entry(vma, &ggtt->base.active_list, vm_link) if (i915_vma_is_pinned(vma)) diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.h b/drivers/gpu/drm/i915/i915_gem_gtt.h index fb15684c1d83..da9aa9f706e7 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.h +++ b/drivers/gpu/drm/i915/i915_gem_gtt.h @@ -255,6 +255,7 @@ struct i915_address_space { struct drm_i915_file_private *file; struct list_head global_link; u64 total; /* size addr space maps (ex. 2GB for ggtt) */ + u64 reserved; /* size addr space reserved */ bool closed; diff --git a/drivers/gpu/drm/i915/i915_vgpu.c b/drivers/gpu/drm/i915/i915_vgpu.c index 4ab8a973b61f..3791e9c9392f 100644 --- a/drivers/gpu/drm/i915/i915_vgpu.c +++ b/drivers/gpu/drm/i915/i915_vgpu.c @@ -92,6 +92,18 @@ struct _balloon_info_ { static struct _balloon_info_ bl_info; +static void vgt_deballoon_space(struct i915_ggtt *ggtt, + struct drm_mm_node *node) +{ + DRM_DEBUG_DRIVER("deballoon space: range [0x%llx - 0x%llx] %llu KiB.\n", + node->start, + node->start + node->size, + node->size / 1024); + + ggtt->base.reserved -= node->size; + drm_mm_remove_node(node); +} + /** * intel_vgt_deballoon - deballoon reserved graphics address trunks * @dev_priv: i915 device private data @@ -108,12 +120,8 @@ void intel_vgt_deballoon(struct drm_i915_private *dev_priv) DRM_DEBUG("VGT deballoon.\n"); - for (i = 0; i < 4; i++) { - if (bl_info.space[i].allocated) - drm_mm_remove_node(&bl_info.space[i]); - } - - memset(&bl_info, 0, sizeof(bl_info)); + for (i = 0; i < 4; i++) + vgt_deballoon_space(&dev_priv->ggtt, &bl_info.space[i]); } static int vgt_balloon_space(struct i915_ggtt *ggtt, @@ -121,15 +129,20 @@ static int vgt_balloon_space(struct i915_ggtt *ggtt, unsigned long start, unsigned long end) { unsigned long size = end - start; + int ret; if (start >= end) return -EINVAL; DRM_INFO("balloon space: range [ 0x%lx - 0x%lx ] %lu KiB.\n", start, end, size / 1024); - return i915_gem_gtt_reserve(&ggtt->base, node, - size, start, I915_COLOR_UNEVICTABLE, - 0); + ret = i915_gem_gtt_reserve(&ggtt->base, node, + size, start, I915_COLOR_UNEVICTABLE, + 0); + if (!ret) + ggtt->base.reserved += size; + + return ret; } /** @@ -222,7 +235,7 @@ int intel_vgt_balloon(struct drm_i915_private *dev_priv) ret = vgt_balloon_space(ggtt, &bl_info.space[3], unmappable_end, ggtt_end); if (ret) - goto err; + goto err_upon_mappable; } /* Mappable graphic memory ballooning */ @@ -231,7 +244,7 @@ int intel_vgt_balloon(struct drm_i915_private *dev_priv) 0, mappable_base); if (ret) - goto err; + goto err_upon_unmappable; } if (mappable_end < ggtt->mappable_end) { @@ -239,14 +252,19 @@ int intel_vgt_balloon(struct drm_i915_private *dev_priv) mappable_end, ggtt->mappable_end); if (ret) - goto err; + goto err_below_mappable; } DRM_INFO("VGT balloon successfully\n"); return 0; +err_below_mappable: + vgt_deballoon_space(ggtt, &bl_info.space[0]); +err_upon_unmappable: + vgt_deballoon_space(ggtt, &bl_info.space[3]); +err_upon_mappable: + vgt_deballoon_space(ggtt, &bl_info.space[2]); err: DRM_ERROR("VGT balloon fail\n"); - intel_vgt_deballoon(dev_priv); return ret; } -- 2.20.1