net: fec_mxc: Adjust RX DMA alignment for mx6solox

[karo-tx-uboot.git] / drivers / net / fec_mxc.c

diff --git a/drivers/net/fec_mxc.c b/drivers/net/fec_mxc.c
index 4cefda48e45b533453a1671e1c3618ae6d4ba853..d31001651642b2e8127e8274aee4485d87b17578 100644 (file)
--- a/drivers/net/fec_mxc.c
+++ b/drivers/net/fec_mxc.c
@@ -28,6 +28,14 @@ DECLARE_GLOBAL_DATA_PTR;
  */
 #define FEC_XFER_TIMEOUT       5000
 
+/*
+ * The standard 32-byte DMA alignment does not work on mx6solox, which requires
+ * 64-byte alignment in the DMA RX FEC buffer.
+ * Introduce the FEC_DMA_RX_MINALIGN which can cover mx6solox needs and also
+ * satisfies the alignment on other SoCs (32-bytes)
+ */
+#define FEC_DMA_RX_MINALIGN    64
+
 #ifndef CONFIG_MII
 #error "CONFIG_MII has to be defined!"
 #endif
@@ -881,9 +889,9 @@ static int fec_alloc_descs(struct fec_priv *fec)
        /* Allocate RX buffers. */
 
        /* Maximum RX buffer size. */
-       size = roundup(FEC_MAX_PKT_SIZE, ARCH_DMA_MINALIGN);
+       size = roundup(FEC_MAX_PKT_SIZE, FEC_DMA_RX_MINALIGN);
        for (i = 0; i < FEC_RBD_NUM; i++) {
-               data = memalign(ARCH_DMA_MINALIGN, size);
+               data = memalign(FEC_DMA_RX_MINALIGN, size);
                if (!data) {
                        printf("%s: error allocating rxbuf %d\n", __func__, i);
                        goto err_ring;