[PATCH v6 05/11] lib/intel_bufops: Add intel_buf_mocs() helper

[Jan Maslak <jan.maslak@intel.com>]

Some genxml-generated pack headers represent MOCS as a single 7-bit
field encoding both the 6-bit MOCS table index at bits 6:1 and the PXP
protected-content bit at bit 0.

intel_buf already carries both pieces of information, but callers would
otherwise have to open-code the packing each time they assign to a
genxml .MOCS field.

Add intel_buf_mocs(buf) to return the packed 7-bit value:

  (buf->mocs_index << 1) | intel_buf_pxp(buf)

This keeps the encoding logic in one place and makes genxml call sites
use the same packing convention consistently.

Signed-off-by: Jan Maslak <jan.maslak@intel.com>
Reviewed-by: Zbigniew Kempczyński <zbigniew.kempczynski@intel.com>
---
 lib/intel_bufops.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/lib/intel_bufops.h b/lib/intel_bufops.h
index d111346aaa..ead2c53e3f 100644
--- a/lib/intel_bufops.h
+++ b/lib/intel_bufops.h
@@ -210,6 +210,19 @@ static inline bool intel_buf_pxp(const struct intel_buf *buf)
 	return buf->is_protected;
 }
 
+/**
+ * intel_buf_mocs:
+ * @buf: the intel_buf
+ *
+ * Returns the full 7-bit MOCS field value for @buf, encoding the 6-bit
+ * table index at bits 6:1 and the PXP protected-content bit at bit 0.
+ * Use this when assigning to a genxml-generated MOCS field.
+ */
+static inline uint8_t intel_buf_mocs(const struct intel_buf *buf)
+{
+	return (buf->mocs_index << 1) | (intel_buf_pxp(buf) ? 1 : 0);
+}
+
 void *intel_buf_cpu_map(struct intel_buf *buf, bool write);
 void *intel_buf_device_map(struct intel_buf *buf, bool write);
 void intel_buf_unmap(struct intel_buf *buf);
-- 
2.43.0