[PATCH 04/19] drm/i915/guc: Keep dma_buf_map of ads_blob around

[Lucas De Marchi]

Convert intel_guc_ads_create() and initialization to use dma_buf_map
rather than plain pointer and save it in the guc struct. This will help
with additional updates to the ads_blob after the
creation/initialization by abstracting the IO vs system memory.

Cc: Matt Roper <matthew.d.roper at intel.com>
Cc: Thomas Hellström <thomas.hellstrom at linux.intel.com>
Cc: Daniel Vetter <daniel at ffwll.ch>
Cc: John Harrison <John.C.Harrison at Intel.com>
Cc: Matthew Brost <matthew.brost at intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
---
 drivers/gpu/drm/i915/gt/uc/intel_guc.h     | 4 +++-
 drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c | 6 ++++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.h b/drivers/gpu/drm/i915/gt/uc/intel_guc.h
index 697d9d66acef..e2e0df1c3d91 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc.h
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.h
@@ -6,8 +6,9 @@
 #ifndef _INTEL_GUC_H_
 #define _INTEL_GUC_H_
 
-#include <linux/xarray.h>
 #include <linux/delay.h>
+#include <linux/dma-buf.h>
+#include <linux/xarray.h>
 
 #include "intel_uncore.h"
 #include "intel_guc_fw.h"
@@ -148,6 +149,7 @@ struct intel_guc {
 	struct i915_vma *ads_vma;
 	/** @ads_blob: contents of the GuC ADS */
 	struct __guc_ads_blob *ads_blob;
+	struct dma_buf_map ads_map;
 	/** @ads_regset_size: size of the save/restore regsets in the ADS */
 	u32 ads_regset_size;
 	/** @ads_golden_ctxt_size: size of the golden contexts in the ADS */
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c
index 668bf4ac9b0c..c012858376f0 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c
@@ -623,6 +623,11 @@ int intel_guc_ads_create(struct intel_guc *guc)
 	if (ret)
 		return ret;
 
+	if (i915_gem_object_is_lmem(guc->ads_vma->obj))
+		dma_buf_map_set_vaddr_iomem(&guc->ads_map, (void __iomem *)guc->ads_blob);
+	else
+		dma_buf_map_set_vaddr(&guc->ads_map, guc->ads_blob);
+
 	__guc_ads_init(guc);
 
 	return 0;
@@ -644,6 +649,7 @@ void intel_guc_ads_destroy(struct intel_guc *guc)
 {
 	i915_vma_unpin_and_release(&guc->ads_vma, I915_VMA_RELEASE_MAP);
 	guc->ads_blob = NULL;
+	dma_buf_map_clear(&guc->ads_map);
 }
 
 static void guc_ads_private_data_reset(struct intel_guc *guc)
-- 
2.35.0