From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Mon, 4 May 2020 12:51:49 +0000 (+0100)
Subject: drm/i915/gem: Specify address type for chained reloc batches
X-Git-Tag: baikal/mips/sdk5.9~13559^2~7^2~84
X-Git-Url: https://git.baikalelectronics.ru/sdk/?a=commitdiff_plain;h=43d3761a1e7557ad1b37a842d0a08794e6244b83;p=kernel.git

drm/i915/gem: Specify address type for chained reloc batches

It is required that a chained batch be in the same address domain as its
parent, and also that must be specified in the command for earlier gen
as it is not inferred from the chaining until gen6.

Fixes: f57e6886513f ("drm/i915/gem: Use chained reloc batches")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200504125149.4396-1-chris@chris-wilson.co.uk
---

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
index cce7df231cb91..1c247ad0971a2 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
@@ -1004,14 +1004,14 @@ static int reloc_gpu_chain(struct reloc_cache *cache)
 	GEM_BUG_ON(cache->rq_size + RELOC_TAIL > PAGE_SIZE  / sizeof(u32));
 	cmd = cache->rq_cmd + cache->rq_size;
 	*cmd++ = MI_ARB_CHECK;
-	if (cache->gen >= 8) {
+	if (cache->gen >= 8)
 		*cmd++ = MI_BATCH_BUFFER_START_GEN8;
-		*cmd++ = lower_32_bits(batch->node.start);
-		*cmd++ = upper_32_bits(batch->node.start);
-	} else {
+	else if (cache->gen >= 6)
 		*cmd++ = MI_BATCH_BUFFER_START;
-		*cmd++ = lower_32_bits(batch->node.start);
-	}
+	else
+		*cmd++ = MI_BATCH_BUFFER_START | MI_BATCH_GTT;
+	*cmd++ = lower_32_bits(batch->node.start);
+	*cmd++ = upper_32_bits(batch->node.start); /* Always 0 for gen<8 */
 	i915_gem_object_flush_map(cache->rq_vma->obj);
 	i915_gem_object_unpin_map(cache->rq_vma->obj);
 	cache->rq_vma = NULL;