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[v4,1/4] drm/i915/gt: Re-work intel_write_status_page

Message ID 20220203200403.378958-2-michael.cheng@intel.com (mailing list archive)
State New, archived
Headers show
Series Use drm_clflush* instead of clflush | expand

Commit Message

Michael Cheng Feb. 3, 2022, 8:04 p.m. UTC 
Re-work intel_write_status_page to use drm_clflush_virt_range. This
will prevent compiler errors when building for non-x86 architectures.

Signed-off-by: Michael Cheng <michael.cheng@intel.com>
---
 drivers/gpu/drm/i915/gt/intel_engine.h | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)
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Patch

diff --git a/drivers/gpu/drm/i915/gt/intel_engine.h b/drivers/gpu/drm/i915/gt/intel_engine.h
index 0e353d8c2bc8..986777c2430d 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine.h
+++ b/drivers/gpu/drm/i915/gt/intel_engine.h
@@ -4,6 +4,7 @@ 
 
 #include <asm/cacheflush.h>
 #include <drm/drm_util.h>
+#include <drm/drm_cache.h>
 
 #include <linux/hashtable.h>
 #include <linux/irq_work.h>
@@ -143,15 +144,9 @@  intel_write_status_page(struct intel_engine_cs *engine, int reg, u32 value)
 	 * of extra paranoia to try and ensure that the HWS takes the value
 	 * we give and that it doesn't end up trapped inside the CPU!
 	 */
-	if (static_cpu_has(X86_FEATURE_CLFLUSH)) {
-		mb();
-		clflush(&engine->status_page.addr[reg]);
-		engine->status_page.addr[reg] = value;
-		clflush(&engine->status_page.addr[reg]);
-		mb();
-	} else {
-		WRITE_ONCE(engine->status_page.addr[reg], value);
-	}
+	drm_clflush_virt_range(&engine->status_page.addr[reg], sizeof(value));
+	WRITE_ONCE(engine->status_page.addr[reg], value);
+	drm_clflush_virt_range(&engine->status_page.addr[reg], sizeof(value));
 }
 
 /*