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Gentoo's Bugzilla – Attachment 391918 Details for
Bug 532926
kernel 3.18 - no GPU acceleration on Intel i965
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[patch]
0001-drm-i915-Disallow-pin-ioctl-completely-for-kms-drive
0001-drm-i915-Disallow-pin-ioctl-completely-for-kms-drive.patch (text/plain), 2.66 KB, created by
Marcin Sochoń (soki)
on 2014-12-18 11:57:02 UTC
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Description:
0001-drm-i915-Disallow-pin-ioctl-completely-for-kms-drive
Filename:
MIME Type:
Creator:
Marcin Sochoń (soki)
Created:
2014-12-18 11:57:02 UTC
Size:
2.66 KB
patch
obsolete
>From d472fcc8379c062bd56a3876fc6ef22258f14a91 Mon Sep 17 00:00:00 2001 >From: Daniel Vetter <daniel.vetter@ffwll.ch> >Date: Mon, 24 Nov 2014 11:12:42 +0100 >Subject: [PATCH] drm/i915: Disallow pin ioctl completely for kms drivers > >The problem here is that SNA pins batchbuffers to etch out a bit more >performance. Iirc it started out as a w/a for i830M (which we've >implemented in the kernel since a long time already). The problem is >that the pin ioctl wasn't added in > >commit d23db88c3ab233daed18709e3a24d6c95344117f >Author: Chris Wilson <chris@chris-wilson.co.uk> >Date: Fri May 23 08:48:08 2014 +0200 > > drm/i915: Prevent negative relocation deltas from wrapping > >Fix this by simply disallowing pinning from userspace so that the >kernel is in full control of batch placement again. Especially since >distros are moving towards running X as non-root, so most users won't >even be able to see any benefits. > >UMS support is dead now, but we need this minimal patch for >backporting. Follow-up patch will remove the pin ioctl code >completely. > >Note to backporters: You must have both > >commit b45305fce5bb1abec263fcff9d81ebecd6306ede >Author: Daniel Vetter <daniel.vetter@ffwll.ch> >Date: Mon Dec 17 16:21:27 2012 +0100 > > drm/i915: Implement workaround for broken CS tlb on i830/845 > >which laned in 3.8 and > >commit c4d69da167fa967749aeb70bc0e94a457e5d00c1 >Author: Chris Wilson <chris@chris-wilson.co.uk> >Date: Mon Sep 8 14:25:41 2014 +0100 > > drm/i915: Evict CS TLBs between batches > >which is also marked cc: stable. Otherwise this could introduce a >regression by disabling the userspace w/a without the kernel w/a being >fully functional on i830/45. > >References: https://bugs.freedesktop.org/show_bug.cgi?id=76554#c116 >Cc: stable@vger.kernel.org # requires c4d69da167fa967749a and v3.8 >Cc: Chris Wilson <chris@chris-wilson.co.uk> >Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> >--- > drivers/gpu/drm/i915/i915_gem.c | 5 ++++- > 1 file changed, 4 insertions(+), 1 deletion(-) > >diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c >index fd17cca..97b86a5 100644 >--- a/drivers/gpu/drm/i915/i915_gem.c >+++ b/drivers/gpu/drm/i915/i915_gem.c >@@ -4263,7 +4263,7 @@ i915_gem_pin_ioctl(struct drm_device *dev, void *data, > struct drm_i915_gem_object *obj; > int ret; > >- if (INTEL_INFO(dev)->gen >= 6) >+ if (drm_core_check_feature(dev, DRIVER_MODESET)) > return -ENODEV; > > ret = i915_mutex_lock_interruptible(dev); >@@ -4319,6 +4319,9 @@ i915_gem_unpin_ioctl(struct drm_device *dev, void *data, > struct drm_i915_gem_object *obj; > int ret; > >+ if (drm_core_check_feature(dev, DRIVER_MODESET)) >+ return -ENODEV; >+ > ret = i915_mutex_lock_interruptible(dev); > if (ret) > return ret; >-- >2.2.0 >
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Attachments on
bug 532926
: 391918