[Intel-xe] [PATCH 02/15] drm/xe/stolen: don't map stolen on small-bar

[Matthew Auld]

The driver should still be functional with small-bar, just that the vram
size is clamped to the BAR size (until we add proper support for tiered
vram). For stolen we shouldn't iomap anything if the BAR size doesn't
also also contain the stolen portion. Stolen should still be functional,
just that allocating CPU visible io memory will always return an error.

Closes: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/209
Reported-by: Lucas De Marchi <lucas.demarchi at intel.com>
Signed-off-by: Matthew Auld <matthew.auld at intel.com>
---
 drivers/gpu/drm/xe/xe_ttm_stolen_mgr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/xe/xe_ttm_stolen_mgr.c b/drivers/gpu/drm/xe/xe_ttm_stolen_mgr.c
index b4e9c88644e4..e5a992ce432a 100644
--- a/drivers/gpu/drm/xe/xe_ttm_stolen_mgr.c
+++ b/drivers/gpu/drm/xe/xe_ttm_stolen_mgr.c
@@ -150,7 +150,7 @@ void xe_ttm_stolen_mgr_init(struct xe_device *xe)
 	drm_dbg_kms(&xe->drm, "Initialized stolen memory support with %llu bytes\n",
 		    stolen_size);
 
-	if (!xe_ttm_stolen_inaccessible(xe))
+	if (mgr->io_base && !xe_ttm_stolen_inaccessible(xe))
 		mgr->mapping = devm_ioremap_wc(&pdev->dev, mgr->io_base, stolen_size);
 }
 
-- 
2.39.1