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Tobias Powalowski
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From d472fcc8379c062bd56a3876fc6ef22258f14a91 Mon Sep 17 00:00:00 2001
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From: Daniel Vetter <daniel.vetter@ffwll.ch>
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Date: Mon, 24 Nov 2014 11:12:42 +0100
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Subject: [PATCH] drm/i915: Disallow pin ioctl completely for kms drivers
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The problem here is that SNA pins batchbuffers to etch out a bit more
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performance. Iirc it started out as a w/a for i830M (which we've
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implemented in the kernel since a long time already). The problem is
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that the pin ioctl wasn't added in
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commit d23db88c3ab233daed18709e3a24d6c95344117f
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Author: Chris Wilson <chris@chris-wilson.co.uk>
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Date: Fri May 23 08:48:08 2014 +0200
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drm/i915: Prevent negative relocation deltas from wrapping
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Fix this by simply disallowing pinning from userspace so that the
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kernel is in full control of batch placement again. Especially since
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distros are moving towards running X as non-root, so most users won't
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even be able to see any benefits.
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UMS support is dead now, but we need this minimal patch for
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backporting. Follow-up patch will remove the pin ioctl code
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completely.
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Note to backporters: You must have both
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commit b45305fce5bb1abec263fcff9d81ebecd6306ede
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Author: Daniel Vetter <daniel.vetter@ffwll.ch>
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Date: Mon Dec 17 16:21:27 2012 +0100
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drm/i915: Implement workaround for broken CS tlb on i830/845
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which laned in 3.8 and
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commit c4d69da167fa967749aeb70bc0e94a457e5d00c1
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Author: Chris Wilson <chris@chris-wilson.co.uk>
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Date: Mon Sep 8 14:25:41 2014 +0100
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drm/i915: Evict CS TLBs between batches
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which is also marked cc: stable. Otherwise this could introduce a
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regression by disabling the userspace w/a without the kernel w/a being
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fully functional on i830/45.
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References: https://bugs.freedesktop.org/show_bug.cgi?id=76554#c116
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Cc: stable@vger.kernel.org # requires c4d69da167fa967749a and v3.8
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Cc: Chris Wilson <chris@chris-wilson.co.uk>
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Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
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---
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drivers/gpu/drm/i915/i915_gem.c | 5 ++++-
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1 file changed, 4 insertions(+), 1 deletion(-)
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diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
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index fd17cca..97b86a5 100644
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--- a/drivers/gpu/drm/i915/i915_gem.c
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+++ b/drivers/gpu/drm/i915/i915_gem.c
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@@ -4263,7 +4263,7 @@ i915_gem_pin_ioctl(struct drm_device *dev, void *data,
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struct drm_i915_gem_object *obj;
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int ret;
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- if (INTEL_INFO(dev)->gen >= 6)
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+ if (drm_core_check_feature(dev, DRIVER_MODESET))
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return -ENODEV;
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ret = i915_mutex_lock_interruptible(dev);
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@@ -4319,6 +4319,9 @@ i915_gem_unpin_ioctl(struct drm_device *dev, void *data,
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struct drm_i915_gem_object *obj;
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int ret;
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+ if (drm_core_check_feature(dev, DRIVER_MODESET))
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+ return -ENODEV;
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+
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ret = i915_mutex_lock_interruptible(dev);
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if (ret)
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return ret;
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--
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2.2.0
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11
PKGBUILD
11
PKGBUILD
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@ -4,7 +4,7 @@
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pkgbase=linux # Build stock -ARCH kernel
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#pkgbase=linux-custom # Build kernel with a different name
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_srcname=linux-3.18
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pkgver=3.18.3
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pkgver=3.18.4
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pkgrel=1
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arch=('i686' 'x86_64')
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url="http://www.kernel.org/"
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@ -20,17 +20,15 @@ source=("https://www.kernel.org/pub/linux/kernel/v3.x/${_srcname}.tar.xz"
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# standard config files for mkinitcpio ramdisk
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'linux.preset'
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'change-default-console-loglevel.patch'
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'0001-drm-i915-Disallow-pin-ioctl-completely-for-kms-drive.patch'
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)
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sha256sums=('becc413cc9e6d7f5cc52a3ce66d65c3725bc1d1cc1001f4ce6c32b69eb188cbd'
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'SKIP'
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'564eed0dfd7aadeec97566da6d09f8636b6335882139cf6d42e45381276bb2d0'
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'57c74ba5266bb10be335a89d30480739b3de67b5a72b3e0b0d37a27775b1862a'
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'SKIP'
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'd3794c8b2cd11b71914b41f7a4e861369d4fa3c29fdd9e1d677ff0c2167eeb52'
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'df7886f5d57f8f85e89987066dfa5c316e922dc0b22e6e6ad01331333db52377'
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'f0d90e756f14533ee67afda280500511a62465b4f76adcc5effa95a40045179c'
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'1256b241cd477b265a3c2d64bdc19ffe3c9bbcee82ea3994c590c2c76e767d99'
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'0bda45a3ef0f2780bbe588f2e53ab2b79814d29e9c6fc7bfff3b0dbdaa9e710d')
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'1256b241cd477b265a3c2d64bdc19ffe3c9bbcee82ea3994c590c2c76e767d99')
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validpgpkeys=(
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'ABAF11C65A2970B130ABE3C479BE3E4300411886' # Linus Torvalds
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'647F28654894E3BD457199BE38DBBDC86092693E' # Greg Kroah-Hartman
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@ -46,9 +44,6 @@ prepare() {
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# add latest fixes from stable queue, if needed
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# http://git.kernel.org/?p=linux/kernel/git/stable/stable-queue.git
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# fix #43143
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patch -p1 -i "${srcdir}/0001-drm-i915-Disallow-pin-ioctl-completely-for-kms-drive.patch"
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# set DEFAULT_CONSOLE_LOGLEVEL to 4 (same value as the 'quiet' kernel param)
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# remove this when a Kconfig knob is made available by upstream
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