linux-kernel - [RFC PATCH 1/7] drm/i915: instantiate ttm ranger manager for stolen memory

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Date:   Tue, 15 Mar 2022 18:04:38 +0000
From:   Robert Beckett <bob.beckett@...labora.com>
To:     intel-gfx@...ts.freedesktop.org,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>
Cc:     Robert Beckett <bob.beckett@...labora.com>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [RFC PATCH 1/7] drm/i915: instantiate ttm ranger manager for stolen memory

Signed-off-by: Robert Beckett <bob.beckett@...labora.com>
---
 drivers/gpu/drm/i915/intel_region_ttm.c | 29 +++++++++++++++++++------
 1 file changed, 22 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_region_ttm.c b/drivers/gpu/drm/i915/intel_region_ttm.c
index 737ef3f4ab54..bb564b830c96 100644
--- a/drivers/gpu/drm/i915/intel_region_ttm.c
+++ b/drivers/gpu/drm/i915/intel_region_ttm.c
@@ -57,11 +57,17 @@ int intel_region_to_ttm_type(const struct intel_memory_region *mem)
 
 	GEM_BUG_ON(mem->type != INTEL_MEMORY_LOCAL &&
 		   mem->type != INTEL_MEMORY_MOCK &&
-		   mem->type != INTEL_MEMORY_SYSTEM);
+		   mem->type != INTEL_MEMORY_SYSTEM &&
+		   mem->type != INTEL_MEMORY_STOLEN_SYSTEM &&
+		   mem->type != INTEL_MEMORY_STOLEN_LOCAL);
 
 	if (mem->type == INTEL_MEMORY_SYSTEM)
 		return TTM_PL_SYSTEM;
 
+	if (mem->type == INTEL_MEMORY_STOLEN_SYSTEM ||
+	    mem->type == INTEL_MEMORY_STOLEN_LOCAL)
+		return TTM_PL_VRAM;
+
 	type = mem->instance + TTM_PL_PRIV;
 	GEM_BUG_ON(type >= TTM_NUM_MEM_TYPES);
 
@@ -85,10 +91,16 @@ int intel_region_ttm_init(struct intel_memory_region *mem)
 	int mem_type = intel_region_to_ttm_type(mem);
 	int ret;
 
-	ret = i915_ttm_buddy_man_init(bdev, mem_type, false,
-				      resource_size(&mem->region),
-				      mem->io_size,
-				      mem->min_page_size, PAGE_SIZE);
+	if (mem_type == TTM_PL_VRAM) {
+		ret = ttm_range_man_init(bdev, mem_type, false,
+					 resource_size(&mem->region) >> PAGE_SHIFT);
+		mem->is_range_manager = true;
+	} else {
+		ret = i915_ttm_buddy_man_init(bdev, mem_type, false,
+					      resource_size(&mem->region),
+					      mem->io_size,
+					      mem->min_page_size, PAGE_SIZE);
+	}
 	if (ret)
 		return ret;
 
@@ -108,6 +120,7 @@ int intel_region_ttm_init(struct intel_memory_region *mem)
 int intel_region_ttm_fini(struct intel_memory_region *mem)
 {
 	struct ttm_resource_manager *man = mem->region_private;
+	int mem_type = intel_region_to_ttm_type(mem);
 	int ret = -EBUSY;
 	int count;
 
@@ -138,8 +151,10 @@ int intel_region_ttm_fini(struct intel_memory_region *mem)
 	if (ret || !man)
 		return ret;
 
-	ret = i915_ttm_buddy_man_fini(&mem->i915->bdev,
-				      intel_region_to_ttm_type(mem));
+	if (mem_type == TTM_PL_VRAM)
+		ret = ttm_range_man_fini(&mem->i915->bdev, mem_type);
+	else
+		ret = i915_ttm_buddy_man_fini(&mem->i915->bdev, mem_type);
 	GEM_WARN_ON(ret);
 	mem->region_private = NULL;
 
-- 
2.25.1