From c9adcfbfee914acdaae7260a172234a400d9eb2c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Thomas=20Hellstr=C3=B6m?= <thomas.hellstrom@linux.intel.com>
Date: Tue, 15 Jun 2021 13:36:00 +0200
Subject: drm/i915: Perform execbuffer object locking as a separate step
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Git-commit: 5cd57f676bb946a00275408f0dd0d75dbc466d25
Patch-mainline: v5.15-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225
To help avoid evicting already resident buffers from the batch we're
processing, perform locking as a separate step.
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210615113600.30660-1-thomas.hellstrom@linux.intel.com
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
.../gpu/drm/i915/gem/i915_gem_execbuffer.c | 25 ++++++++++++++++---
1 file changed, 21 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
index 9f6f3dcf0b6e..24b348cb8f1e 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
@@ -920,21 +920,38 @@ static int eb_lookup_vmas(struct i915_execbuffer *eb)
return err;
}
-static int eb_validate_vmas(struct i915_execbuffer *eb)
+static int eb_lock_vmas(struct i915_execbuffer *eb)
{
unsigned int i;
int err;
- INIT_LIST_HEAD(&eb->unbound);
-
for (i = 0; i < eb->buffer_count; i++) {
- struct drm_i915_gem_exec_object2 *entry = &eb->exec[i];
struct eb_vma *ev = &eb->vma[i];
struct i915_vma *vma = ev->vma;
err = i915_gem_object_lock(vma->obj, &eb->ww);
if (err)
return err;
+ }
+
+ return 0;
+}
+
+static int eb_validate_vmas(struct i915_execbuffer *eb)
+{
+ unsigned int i;
+ int err;
+
+ INIT_LIST_HEAD(&eb->unbound);
+
+ err = eb_lock_vmas(eb);
+ if (err)
+ return err;
+
+ for (i = 0; i < eb->buffer_count; i++) {
+ struct drm_i915_gem_exec_object2 *entry = &eb->exec[i];
+ struct eb_vma *ev = &eb->vma[i];
+ struct i915_vma *vma = ev->vma;
err = eb_pin_vma(eb, entry, ev);
if (err == -EDEADLK)
--
2.38.1