[PATCH V20 12/15] drm/xe/vram: Check disable_vram_page_offline policy in fault handler

[Tejas Upadhyay <tejas.upadhyay@intel.com>]

Before reserving a page at a faulting address, check the cached
disable_vram_page_offline policy from xe->ras. If the policy is
enabled (logging only), log the corrupted address and return
-EOPNOTSUPP so that RAS can report to firmware to drop the
address from the SRAM queue without attempting to offline the
page.

Reviewed-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Signed-off-by: Tejas Upadhyay <tejas.upadhyay@intel.com>
---
 drivers/gpu/drm/xe/xe_ttm_vram_mgr.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_ttm_vram_mgr.c b/drivers/gpu/drm/xe/xe_ttm_vram_mgr.c
index 0ab92bc3c699..00569c5279a8 100644
--- a/drivers/gpu/drm/xe/xe_ttm_vram_mgr.c
+++ b/drivers/gpu/drm/xe/xe_ttm_vram_mgr.c
@@ -21,6 +21,7 @@
 #include "xe_lrc.h"
 #include "xe_mmio.h"
 #include "xe_pm.h"
+#include "xe_printk.h"
 #include "xe_res_cursor.h"
 #include "xe_ttm_stolen_mgr.h"
 #include "xe_ttm_vram_mgr.h"
@@ -906,6 +907,12 @@ int xe_ttm_vram_handle_addr_fault(struct xe_device *xe, u64 addr)
 	vram_mgr = &vr->ttm;
 	mm = &vram_mgr->mm;
 
+	if (xe->ras.disable_vram_page_offline) {
+		xe_err(xe, "0x%llx is reported as corrupted address by HW\n",
+		       addr);
+		return -EOPNOTSUPP;
+	}
+
 	/* Reserve page at address */
 	return xe_ttm_vram_reserve_page_at_addr(xe, addr - vr->dpa_base, vram_mgr, mm);
 }
-- 
2.52.0