octeon_ep: fix tx dma unmap len values in SG

[sfrench/cifs-2.6.git] / drivers / net / ethernet / marvell / octeon_ep / octep_tx.h

diff --git a/drivers/net/ethernet/marvell/octeon_ep/octep_tx.h b/drivers/net/ethernet/marvell/octeon_ep/octep_tx.h
index 2ef57980eb47b8ee44c22c40acb9d18355f58956..21e75ff9f5e71165be04cdefd72678bd5911a663 100644 (file)
--- a/drivers/net/ethernet/marvell/octeon_ep/octep_tx.h
+++ b/drivers/net/ethernet/marvell/octeon_ep/octep_tx.h
@@ -17,7 +17,21 @@
 #define TX_BUFTYPE_NET_SG        2
 #define NUM_TX_BUFTYPES          3
 
-/* Hardware format for Scatter/Gather list */
+/* Hardware format for Scatter/Gather list
+ *
+ * 63      48|47     32|31     16|15       0
+ * -----------------------------------------
+ * |  Len 0  |  Len 1  |  Len 2  |  Len 3  |
+ * -----------------------------------------
+ * |                Ptr 0                  |
+ * -----------------------------------------
+ * |                Ptr 1                  |
+ * -----------------------------------------
+ * |                Ptr 2                  |
+ * -----------------------------------------
+ * |                Ptr 3                  |
+ * -----------------------------------------
+ */
 struct octep_tx_sglist_desc {
        u16 len[4];
        dma_addr_t dma_ptr[4];