1 files changed, 25 insertions, 4 deletions

diff --git a/Documentation/networking/stmmac.txt b/Documentation/networking/stmmac.txt
index d0aeeadd264b..ab1e8d7004c5 100644
--- a/Documentation/networking/stmmac.txt
+++ b/Documentation/networking/stmmac.txt
@@ -111,11 +111,12 @@ and detailed below as well:
         int phy_addr;
         int interface;
         struct stmmac_mdio_bus_data *mdio_bus_data;
-        int pbl;
+        struct stmmac_dma_cfg *dma_cfg;
         int clk_csr;
         int has_gmac;
         int enh_desc;
         int tx_coe;
+        int rx_coe;
         int bugged_jumbo;
         int pmt;
         int force_sf_dma_mode;
@@ -136,10 +137,12 @@ Where:
  o pbl: the Programmable Burst Length is maximum number of beats to
        be transferred in one DMA transaction.
        GMAC also enables the 4xPBL by default.
- o clk_csr: CSR Clock range selection.
+ o clk_csr: fixed CSR Clock range selection.
  o has_gmac: uses the GMAC core.
  o enh_desc: if sets the MAC will use the enhanced descriptor structure.
  o tx_coe: core is able to perform the tx csum in HW.
+ o rx_coe: the supports three check sum offloading engine types:
+           type_1, type_2 (full csum) and no RX coe.
  o bugged_jumbo: some HWs are not able to perform the csum in HW for
                 over-sized frames due to limited buffer sizes.
                 Setting this flag the csum will be done in SW on
@@ -160,7 +163,7 @@ Where:
  o custom_cfg: this is a custom configuration that can be passed while
               initialising the resources.
 
-The we have:
+For MDIO bus The we have:
 
  struct stmmac_mdio_bus_data {
         int bus_id;
@@ -177,10 +180,28 @@ Where:
  o irqs: list of IRQs, one per PHY.
  o probed_phy_irq: if irqs is NULL, use this for probed PHY.
 
+
+For DMA engine we have the following internal fields that should be
+tuned according to the HW capabilities.
+
+struct stmmac_dma_cfg {
+        int pbl;
+        int fixed_burst;
+        int burst_len_supported;
+};
+
+Where:
+ o pbl: Programmable Burst Length
+ o fixed_burst: program the DMA to use the fixed burst mode
+ o burst_len: this is the value we put in the register
+              supported values are provided as macros in
+              linux/stmmac.h header file.
+
+---
+
 Below an example how the structures above are using on ST platforms.
 
  static struct plat_stmmacenet_data stxYYY_ethernet_platform_data = {
-        .pbl = 32,
         .has_gmac = 0,
         .enh_desc = 0,
         .fix_mac_speed = stxYYY_ethernet_fix_mac_speed,