From: Chris Wilson <chris@chris-wilson.co.uk>
To: intel-gfx@lists.freedesktop.org
Subject: [PATCH 10/30] drm/i915: fix ilk rc6 teardown locking
Date: Tue, 12 Apr 2011 21:31:38 +0100 [thread overview]
Message-ID: <1302640318-23165-11-git-send-email-chris@chris-wilson.co.uk> (raw)
In-Reply-To: <1302640318-23165-1-git-send-email-chris@chris-wilson.co.uk>
From: Ben Widawsky <ben@bwidawsk.net>
In the failure cases during rc6 initialization, both the power context
and render context may get !refcount without holding struct_mutex.
However, on rc6 disabling, the lock is held by the caller.
Rearranged the locking so that it's safe in both cases.
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
drivers/gpu/drm/i915/intel_display.c | 11 ++++++++---
1 files changed, 8 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 1018db6..bebb8e8 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6598,13 +6598,14 @@ intel_alloc_context_page(struct drm_device *dev)
struct drm_i915_gem_object *ctx;
int ret;
+ WARN_ON(!mutex_is_locked(&dev->struct_mutex));
+
ctx = i915_gem_alloc_object(dev, 4096);
if (!ctx) {
DRM_DEBUG("failed to alloc power context, RC6 disabled\n");
return NULL;
}
- mutex_lock(&dev->struct_mutex);
ret = i915_gem_object_pin(ctx, 4096, true);
if (ret) {
DRM_ERROR("failed to pin power context: %d\n", ret);
@@ -6616,7 +6617,6 @@ intel_alloc_context_page(struct drm_device *dev)
DRM_ERROR("failed to set-domain on power context: %d\n", ret);
goto err_unpin;
}
- mutex_unlock(&dev->struct_mutex);
return ctx;
@@ -7180,9 +7180,12 @@ void ironlake_enable_rc6(struct drm_device *dev)
if (!i915_enable_rc6)
return;
+ mutex_lock(&dev->struct_mutex);
ret = ironlake_setup_rc6(dev);
- if (ret)
+ if (ret) {
+ mutex_unlock(&dev->struct_mutex);
return;
+ }
/*
* GPU can automatically power down the render unit if given a page
@@ -7191,6 +7194,7 @@ void ironlake_enable_rc6(struct drm_device *dev)
ret = BEGIN_LP_RING(6);
if (ret) {
ironlake_teardown_rc6(dev);
+ mutex_unlock(&dev->struct_mutex);
return;
}
@@ -7208,6 +7212,7 @@ void ironlake_enable_rc6(struct drm_device *dev)
I915_WRITE(PWRCTXA, dev_priv->pwrctx->gtt_offset | PWRCTX_EN);
I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) & ~RCX_SW_EXIT);
+ mutex_unlock(&dev->struct_mutex);
}
--
1.7.4.1
next prev parent reply other threads:[~2011-04-12 20:32 UTC|newest]
Thread overview: 71+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-12 20:31 i915 next Chris Wilson
2011-04-12 20:31 ` [PATCH 01/30] drm/i915: Split the crtc_mode_set function along HAS_PCH_SPLIT() lines Chris Wilson
2011-04-12 20:31 ` [PATCH 02/30] drm/i915: Move the vblank pre/post modeset to the common crtc_mode_set Chris Wilson
2011-04-12 20:31 ` [PATCH 03/30] drm/i915: Remove the PCH paths from the pre-Ironlake crtc_mode_set() Chris Wilson
2011-04-12 20:31 ` [PATCH 04/30] drm/i915: Drop the eDP paths from the pre-Ironlake crtc_mode_set Chris Wilson
2011-04-12 20:31 ` [PATCH 05/30] drm/i915: Drop the remaining bit of Ironlake code from i9xx_crtc_mode_set() Chris Wilson
2011-04-12 20:31 ` [PATCH 06/30] drm/i915: Drop non-HAS_PCH_SPLIT() code from ironlake_crtc_mode_set() Chris Wilson
2011-04-12 20:31 ` [PATCH 07/30] drm/i915: Drop remaining pre-Ironlake " Chris Wilson
2011-04-12 20:31 ` [PATCH 08/30] drm/i915: Clean up leftover DPLL and LVDS register choice from pch split Chris Wilson
2011-04-12 20:31 ` [PATCH 09/30] drm/i915: Fold the DPLL limit defines into the structs that use them Chris Wilson
2011-04-12 20:31 ` Chris Wilson [this message]
2011-04-12 20:31 ` [PATCH 11/30] drm/1915: ringbuffer wait for idle function Chris Wilson
2011-04-12 20:31 ` [PATCH 12/30] drm/i915: fix rc6 initialization on Ironlake Chris Wilson
2011-04-12 20:31 ` [PATCH 13/30] drm/i915: re-enable rc6 for ironlake Chris Wilson
2011-04-12 20:31 ` [PATCH 14/30] drm/i915: use i915_enable_rc6 on SNB too Chris Wilson
2011-04-12 20:31 ` [PATCH 15/30] drm/i915: Rename agp_type to cache_level Chris Wilson
2011-04-13 15:57 ` Daniel Vetter
2011-04-12 20:31 ` [PATCH 16/30] drm/i915: Mark the cursor and the overlay as being part of the display planes Chris Wilson
2011-04-13 16:00 ` Daniel Vetter
2011-04-12 20:31 ` [PATCH 17/30] drm/i915: Do not clflush snooped objects Chris Wilson
2011-04-13 16:04 ` Daniel Vetter
2011-04-13 17:34 ` Chris Wilson
2011-04-13 20:47 ` Daniel Vetter
2011-04-12 20:31 ` [PATCH 18/30] drm/i915: Add an interface to dynamically change the cache level Chris Wilson
2011-04-13 18:59 ` Daniel Vetter
2011-04-13 19:21 ` Chris Wilson
2011-04-13 22:27 ` [PATCH 1/3] drm/i915: Introduce i915_gem_object_finish_gpu() Chris Wilson
2011-04-13 22:27 ` [PATCH 2/3] drm/i915: Introduce i915_gem_object_finish_gtt() Chris Wilson
2011-04-13 22:27 ` [PATCH 3/3] drm/i915: Add an interface to dynamically change the cache level Chris Wilson
2011-04-12 20:31 ` [PATCH 19/30] drm/i915: Use the uncached domain for the display planes v2 Chris Wilson
2011-04-12 20:31 ` [PATCH 20/30] drm/i915: Use the CPU domain for snooped pwrites Chris Wilson
2011-04-12 20:31 ` [PATCH 21/30] drm/i915: Redirect GTT mappings to the CPU page if cache-coherent Chris Wilson
2011-04-13 15:57 ` Eric Anholt
2011-04-13 16:19 ` Chris Wilson
2011-04-13 18:35 ` [PATCH] " Chris Wilson
2011-04-13 19:13 ` Daniel Vetter
2011-04-13 19:47 ` Chris Wilson
2011-04-13 20:26 ` [PATCH] drm/i915: Prevent mmap access through the GTT of snooped pages Chris Wilson
2011-04-13 20:51 ` Daniel Vetter
2011-04-12 20:31 ` [PATCH 22/30] drm/i915: Use the LLC mode on gen6 for everything but display Chris Wilson
2011-04-13 19:15 ` Daniel Vetter
2011-04-12 20:31 ` [PATCH 23/30] drm/i915: Cache GT fifo count for SandyBridge Chris Wilson
2011-04-14 2:21 ` Ben Widawsky
2011-04-14 4:48 ` Ben Widawsky
2011-04-12 20:31 ` [PATCH 24/30] drm/i915: Refactor pwrite/pread to use single copy of get_user_pages Chris Wilson
2011-04-13 15:59 ` Eric Anholt
2011-04-13 17:24 ` Chris Wilson
2011-04-13 19:35 ` Eric Anholt
2011-04-13 19:26 ` Daniel Vetter
2011-04-13 19:56 ` Chris Wilson
2011-04-13 20:56 ` Daniel Vetter
2011-04-14 23:23 ` Ben Widawsky
2011-04-15 9:48 ` Paul Menzel
2011-04-16 8:03 ` Chris Wilson
2011-04-12 20:31 ` [PATCH 25/30] drm/i915: s/addr & ~PAGE_MASK/offset_in_page(addr)/ Chris Wilson
2011-04-12 20:31 ` [PATCH 26/30] drm/i915: Maintain fenced gpu access until we flush the fence Chris Wilson
2011-04-13 19:37 ` Daniel Vetter
2011-04-13 20:15 ` Chris Wilson
2011-04-13 20:58 ` Daniel Vetter
2011-04-13 21:37 ` Chris Wilson
2011-04-12 20:31 ` [PATCH 27/30] drm/i915: Invalidate fenced read domains upon flush Chris Wilson
2011-04-13 19:43 ` Daniel Vetter
2011-04-13 20:38 ` Chris Wilson
2011-04-13 21:02 ` Daniel Vetter
2011-04-12 20:31 ` [PATCH 28/30] drm/i915: Pass the fence register number to be written Chris Wilson
2011-04-13 19:48 ` Daniel Vetter
2011-04-12 20:31 ` [PATCH 29/30] drm/i915: Track fence setup separately from fenced object lifetime Chris Wilson
2011-04-13 20:42 ` Daniel Vetter
2011-04-13 21:56 ` Chris Wilson
2011-04-12 20:31 ` [PATCH 30/30] drm/i915: Only print out the actual number of fences for i915_error_state Chris Wilson
2011-04-13 7:26 ` i915 next Chris Wilson
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1302640318-23165-11-git-send-email-chris@chris-wilson.co.uk \
--to=chris@chris-wilson.co.uk \
--cc=intel-gfx@lists.freedesktop.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).