From: Chris Wilson <chris@chris-wilson.co.uk>
To: intel-gfx@lists.freedesktop.org
Cc: Matthew Auld <matthew.auld@intel.com>
Subject: [PATCH 2/2] drm/i915/gtt: Control cache domain of dma_map_page() directly
Date: Fri, 6 Jul 2018 13:26:11 +0100 [thread overview]
Message-ID: <20180706122611.4142-2-chris@chris-wilson.co.uk> (raw)
In-Reply-To: <20180706122611.4142-1-chris@chris-wilson.co.uk>
We already maually control the CPU cache for our page table directories,
so we can tell the dma mapper to skip doing it as well.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Matthew Auld <matthew.auld@intel.com>
---
drivers/gpu/drm/i915/i915_gem_gtt.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index ee881998a7d3..3b7a1437bfbf 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -564,6 +564,7 @@ static int __setup_page_dma(struct i915_address_space *vm,
p->daddr = dma_map_page_attrs(vm->dma,
p->page, 0, PAGE_SIZE,
PCI_DMA_BIDIRECTIONAL,
+ DMA_ATTR_SKIP_CPU_SYNC |
DMA_ATTR_NO_WARN);
if (unlikely(dma_mapping_error(vm->dma, p->daddr))) {
vm_free_page(vm, p->page);
@@ -648,6 +649,7 @@ setup_scratch_page(struct i915_address_space *vm, gfp_t gfp)
addr = dma_map_page_attrs(vm->dma,
page, 0, size,
PCI_DMA_BIDIRECTIONAL,
+ DMA_ATTR_SKIP_CPU_SYNC |
DMA_ATTR_NO_WARN);
if (unlikely(dma_mapping_error(vm->dma, addr)))
goto free_page;
--
2.18.0
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next prev parent reply other threads:[~2018-07-06 12:26 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-06 12:26 [PATCH 1/2] drm/i915/gtt: Suppress warnings for dma_map_page Chris Wilson
2018-07-06 12:26 ` Chris Wilson [this message]
2018-07-06 12:55 ` [PATCH 2/2] drm/i915/gtt: Control cache domain of dma_map_page() directly Matthew Auld
2018-07-06 12:32 ` [PATCH 1/2] drm/i915/gtt: Suppress warnings for dma_map_page Matthew Auld
2018-07-06 15:01 ` ✓ Fi.CI.BAT: success for series starting with [1/2] " Patchwork
2018-07-07 10:35 ` ✓ Fi.CI.IGT: " Patchwork
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