[Intel-xe] [PATCH v3 18/20] drm/xe/guc: Allocate GuC data structures in system memory for initial load

[Michał Winiarski]

GuC load will need to happen at an earlier point in probe, where local
memory is not yet available. Use system memory for GuC data structures
used for initial "hwconfig" load, and realloc at a later,
"post-hwconfig" load, when local memory is available.

Signed-off-by: Michał Winiarski <michal.winiarski at intel.com>
---
 drivers/gpu/drm/xe/xe_guc.c     | 45 +++++++++++++++++++++++++++++++++
 drivers/gpu/drm/xe/xe_guc_ads.c |  2 +-
 drivers/gpu/drm/xe/xe_guc_ct.c  |  2 +-
 drivers/gpu/drm/xe/xe_guc_log.c |  2 +-
 4 files changed, 48 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_guc.c b/drivers/gpu/drm/xe/xe_guc.c
index d1181ddf4bdae..3f430d5bc1051 100644
--- a/drivers/gpu/drm/xe/xe_guc.c
+++ b/drivers/gpu/drm/xe/xe_guc.c
@@ -251,6 +251,45 @@ static void guc_fini(struct drm_device *drm, void *arg)
 	xe_force_wake_put(gt_to_fw(guc_to_gt(guc)), XE_FORCEWAKE_ALL);
 }
 
+static int __guc_bo_reinit(struct xe_guc *guc, struct xe_bo **src)
+{
+	struct xe_tile *tile = gt_to_tile(guc_to_gt(guc));
+	struct xe_device *xe = guc_to_xe(guc);
+	struct xe_bo *bo;
+
+	bo = xe_bo_create_from_data(xe, tile, &(*src)->vmap.vaddr, (*src)->size, ttm_bo_type_kernel,
+				    XE_BO_CREATE_VRAM_IF_DGFX(tile));
+	if (IS_ERR(bo))
+		return PTR_ERR(bo);
+
+	xchg(src, bo);
+	xe_bo_unpin_map_no_vm(bo);
+
+	return 0;
+}
+
+static int xe_guc_realloc_post_hwconfig(struct xe_guc *guc)
+{
+	int ret;
+
+	if (!IS_DGFX(guc_to_xe(guc)))
+		return 0;
+
+	ret = __guc_bo_reinit(guc, &guc->log.bo);
+	if (ret)
+		return ret;
+
+	ret = __guc_bo_reinit(guc, &guc->ads.bo);
+	if (ret)
+		return ret;
+
+	ret = __guc_bo_reinit(guc, &guc->ct.bo);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
 int xe_guc_init(struct xe_guc *guc)
 {
 	struct xe_device *xe = guc_to_xe(guc);
@@ -309,6 +348,12 @@ int xe_guc_init(struct xe_guc *guc)
  */
 int xe_guc_init_post_hwconfig(struct xe_guc *guc)
 {
+	int ret;
+
+	ret = xe_guc_realloc_post_hwconfig(guc);
+	if (ret)
+		return ret;
+
 	guc_init_params_post_hwconfig(guc);
 
 	return xe_guc_ads_init_post_hwconfig(&guc->ads);
diff --git a/drivers/gpu/drm/xe/xe_guc_ads.c b/drivers/gpu/drm/xe/xe_guc_ads.c
index 88789826e7817..88514d09303d0 100644
--- a/drivers/gpu/drm/xe/xe_guc_ads.c
+++ b/drivers/gpu/drm/xe/xe_guc_ads.c
@@ -282,7 +282,7 @@ int xe_guc_ads_init(struct xe_guc_ads *ads)
 	bo = xe_bo_create_pin_map(xe, tile, NULL, guc_ads_size(ads) +
 				  MAX_GOLDEN_LRC_SIZE,
 				  ttm_bo_type_kernel,
-				  XE_BO_CREATE_VRAM_IF_DGFX(tile) |
+				  XE_BO_CREATE_SYSTEM_BIT |
 				  XE_BO_CREATE_GGTT_BIT);
 	if (IS_ERR(bo))
 		return PTR_ERR(bo);
diff --git a/drivers/gpu/drm/xe/xe_guc_ct.c b/drivers/gpu/drm/xe/xe_guc_ct.c
index a84e111bb36ad..8f190cc0e5527 100644
--- a/drivers/gpu/drm/xe/xe_guc_ct.c
+++ b/drivers/gpu/drm/xe/xe_guc_ct.c
@@ -148,7 +148,7 @@ int xe_guc_ct_init(struct xe_guc_ct *ct)
 
 	bo = xe_bo_create_pin_map(xe, tile, NULL, guc_ct_size(),
 				  ttm_bo_type_kernel,
-				  XE_BO_CREATE_VRAM_IF_DGFX(tile) |
+				  XE_BO_CREATE_SYSTEM_BIT |
 				  XE_BO_CREATE_GGTT_BIT);
 	if (IS_ERR(bo))
 		return PTR_ERR(bo);
diff --git a/drivers/gpu/drm/xe/xe_guc_log.c b/drivers/gpu/drm/xe/xe_guc_log.c
index 45c60a9c631c3..6334311a56e63 100644
--- a/drivers/gpu/drm/xe/xe_guc_log.c
+++ b/drivers/gpu/drm/xe/xe_guc_log.c
@@ -93,7 +93,7 @@ int xe_guc_log_init(struct xe_guc_log *log)
 
 	bo = xe_bo_create_pin_map(xe, tile, NULL, guc_log_size(),
 				  ttm_bo_type_kernel,
-				  XE_BO_CREATE_VRAM_IF_DGFX(tile) |
+				  XE_BO_CREATE_SYSTEM_BIT |
 				  XE_BO_CREATE_GGTT_BIT);
 	if (IS_ERR(bo))
 		return PTR_ERR(bo);
-- 
2.42.1