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From: Chris Wilson <chris@chris-wilson.co.uk>
To: intel-gfx@lists.freedesktop.org
Subject: [PATCH 05/17] drm/i915: Pin the pages whilst operating on them
Date: Mon, 22 Aug 2016 09:03:38 +0100	[thread overview]
Message-ID: <20160822080350.4964-6-chris@chris-wilson.co.uk> (raw)
In-Reply-To: <20160822080350.4964-1-chris@chris-wilson.co.uk>

As a safety precaution, whilst we operate on the object's pages
(clflushing them, updating the LRU) make sure we hold a pin on those
pages to prevent them disappearing underneath us.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/i915_gem.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index de895c7ef9e6..e601b74c19f9 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -3251,6 +3251,7 @@ i915_gem_object_set_to_gtt_domain(struct drm_i915_gem_object *obj, bool write)
 	if (ret)
 		return ret;
 
+	i915_gem_object_pin_pages(obj);
 	i915_gem_object_flush_cpu_write_domain(obj);
 
 	/* Serialise direct access to this object with the barriers for
@@ -3280,6 +3281,7 @@ i915_gem_object_set_to_gtt_domain(struct drm_i915_gem_object *obj, bool write)
 
 	/* And bump the LRU for this access */
 	i915_gem_object_bump_inactive_ggtt(obj);
+	i915_gem_object_unpin_pages(obj);
 
 	return 0;
 }
-- 
2.9.3

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  parent reply	other threads:[~2016-08-22  8:04 UTC|newest]

Thread overview: 47+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-08-22  8:03 Execbuf fixes and major tuning Chris Wilson
2016-08-22  8:03 ` [PATCH 01/17] drm/i915: Skip holding an object reference for execbuf preparation Chris Wilson
2016-08-22 11:21   ` Joonas Lahtinen
2016-08-22 11:56     ` Chris Wilson
2016-08-22  8:03 ` [PATCH 02/17] drm/i915: Defer active reference until required Chris Wilson
2016-08-22  8:03 ` [PATCH 03/17] drm/i915: Allow the user to pass a context to any ring Chris Wilson
2016-08-22 11:23   ` Joonas Lahtinen
2016-08-22 12:23     ` Chris Wilson
2016-08-23 13:28       ` John Harrison
2016-08-23 13:33         ` John Harrison
2016-08-25 15:28           ` John Harrison
2016-08-29 12:21             ` Joonas Lahtinen
2016-08-22  8:03 ` [PATCH 04/17] drm/i915: Fix i915_gem_evict_for_vma (soft-pinning) Chris Wilson
2016-08-22  8:03 ` Chris Wilson [this message]
2016-08-23 11:54   ` [PATCH 05/17] drm/i915: Pin the pages whilst operating on them Joonas Lahtinen
2016-08-22  8:03 ` [PATCH 06/17] drm/i915: Move obj->dirty:1 to obj->flags Chris Wilson
2016-08-23 12:01   ` Joonas Lahtinen
2016-09-06 11:37   ` Dave Gordon
2016-09-06 13:16     ` Chris Wilson
2016-08-22  8:03 ` [PATCH 07/17] drm/i915: Use the precomputed value for whether to enable command parsing Chris Wilson
2016-08-24 14:33   ` John Harrison
2016-08-27  9:12     ` Chris Wilson
2016-08-22  8:03 ` [PATCH 08/17] drm/i915: Drop spinlocks around adding to the client request list Chris Wilson
2016-08-24 13:16   ` Mika Kuoppala
2016-08-24 13:25     ` Chris Wilson
2016-08-26  9:13   ` Mika Kuoppala
2016-09-02 10:30   ` John Harrison
2016-09-02 10:59     ` Chris Wilson
2016-09-02 11:02       ` Chris Wilson
2016-09-02 13:20         ` John Harrison
2016-09-02 13:38           ` Chris Wilson
2016-08-22  8:03 ` [PATCH 09/17] drm/i915: Amalgamate execbuffer parameter structures Chris Wilson
2016-08-24 13:20   ` John Harrison
2016-08-22  8:03 ` [PATCH 10/17] drm/i915: Use vma->exec_entry as our double-entry placeholder Chris Wilson
2016-08-22  8:03 ` [PATCH 11/17] drm/i915: Store a direct lookup from object handle to vma Chris Wilson
2016-08-22  8:03 ` [PATCH 12/17] drm/i915: Pass vma to relocate entry Chris Wilson
2016-08-22  8:03 ` [PATCH 13/17] drm/i915: Eliminate lots of iterations over the execobjects array Chris Wilson
2016-08-25  6:03   ` [PATCH v2] " Chris Wilson
2016-08-22  8:03 ` [PATCH 14/17] drm/i915: First try the previous execbuffer location Chris Wilson
2016-08-22  8:03 ` [PATCH 15/17] drm/i915: Wait upon userptr get-user-pages within execbuffer Chris Wilson
2016-08-23 10:53   ` Joonas Lahtinen
2016-08-23 11:14     ` Chris Wilson
2016-08-22  8:03 ` [PATCH 16/17] drm/i915: Remove superfluous i915_add_request_no_flush() helper Chris Wilson
2016-08-23 10:21   ` Joonas Lahtinen
2016-08-22  8:03 ` [PATCH 17/17] drm/i915: Use the MRU stack search after evicting Chris Wilson
2016-08-23 13:52 ` ✗ Fi.CI.BAT: failure for series starting with [01/17] drm/i915: Skip holding an object reference for execbuf preparation Patchwork
2016-08-25  6:51 ` ✗ Fi.CI.BAT: warning for series starting with [01/17] drm/i915: Skip holding an object reference for execbuf preparation (rev2) Patchwork

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