X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=drivers%2Fnet%2Fsfc%2Fbase%2Fefx_mcdi.h;h=40072405e7c2d9845253a6b96e7801bcf45ea42d;hb=e7feaba71c02418796afbe4356840e725ca6df6b;hp=d2cd1e9e13be84cae4350e8ad4667218a5eed218;hpb=0c52235b43f818e886f5a378a0a7c0d682ae42e9;p=dpdk.git

diff --git a/drivers/net/sfc/base/efx_mcdi.h b/drivers/net/sfc/base/efx_mcdi.h
index d2cd1e9e13..40072405e7 100644
--- a/drivers/net/sfc/base/efx_mcdi.h
+++ b/drivers/net/sfc/base/efx_mcdi.h
@@ -384,6 +384,17 @@ efx_mcdi_phy_module_get_info(
 	(((mask) & (MC_CMD_PRIVILEGE_MASK_IN_GRP_ ## priv)) ==		\
 	(MC_CMD_PRIVILEGE_MASK_IN_GRP_ ## priv))
 
+/*
+ * The buffer size must be a multiple of dword to ensure that MCDI works
+ * properly with Siena based boards (which use on-chip buffer). Also, it
+ * should be at minimum the size of two dwords to allow space for extended
+ * error responses if the request/response buffer sizes are smaller.
+ */
+#define EFX_MCDI_DECLARE_BUF(_name, _in_len, _out_len)			\
+	uint8_t _name[P2ROUNDUP(MAX(MAX(_in_len, _out_len),		\
+				    (2 * sizeof (efx_dword_t))),	\
+				sizeof (efx_dword_t))] = {0}
+
 typedef enum efx_mcdi_feature_id_e {
 	EFX_MCDI_FEATURE_FW_UPDATE = 0,
 	EFX_MCDI_FEATURE_LINK_CONTROL,