net: add support for STMicroelectronics Ethernet controllers.

This is the driver for the ST MAC 10/100/1000 on-chip Ethernet
controllers (Synopsys IP blocks).

Driver documentation:
 o http://stlinux.com/drupal/kernel/network/stmmac
Revisions:
 o http://stlinux.com/drupal/kernel/network/stmmac-driver-revisions
Performances:
 o http://stlinux.com/drupal/benchmarks/networking/stmmac

Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 163 insertions, 0 deletions

diff --git a/drivers/net/stmmac/descs.h b/drivers/net/stmmac/descs.h
new file mode 100644
index 000000000000..6d2a0b2f5e57
--- /dev/null
+++ b/drivers/net/stmmac/descs.h
@@ -0,0 +1,163 @@
+/*******************************************************************************
+  Header File to describe the DMA descriptors
+  Use enhanced descriptors in case of GMAC Cores.
+
+  This program is free software; you can redistribute it and/or modify it
+  under the terms and conditions of the GNU General Public License,
+  version 2, as published by the Free Software Foundation.
+
+  This program is distributed in the hope it will be useful, but WITHOUT
+  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+  more details.
+
+  You should have received a copy of the GNU General Public License along with
+  this program; if not, write to the Free Software Foundation, Inc.,
+  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+
+  The full GNU General Public License is included in this distribution in
+  the file called "COPYING".
+
+  Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
+*******************************************************************************/
+struct dma_desc {
+        /* Receive descriptor */
+        union {
+                struct {
+                        /* RDES0 */
+                        u32 reserved1:1;
+                        u32 crc_error:1;
+                        u32 dribbling:1;
+                        u32 mii_error:1;
+                        u32 receive_watchdog:1;
+                        u32 frame_type:1;
+                        u32 collision:1;
+                        u32 frame_too_long:1;
+                        u32 last_descriptor:1;
+                        u32 first_descriptor:1;
+                        u32 multicast_frame:1;
+                        u32 run_frame:1;
+                        u32 length_error:1;
+                        u32 partial_frame_error:1;
+                        u32 descriptor_error:1;
+                        u32 error_summary:1;
+                        u32 frame_length:14;
+                        u32 filtering_fail:1;
+                        u32 own:1;
+                        /* RDES1 */
+                        u32 buffer1_size:11;
+                        u32 buffer2_size:11;
+                        u32 reserved2:2;
+                        u32 second_address_chained:1;
+                        u32 end_ring:1;
+                        u32 reserved3:5;
+                        u32 disable_ic:1;
+                } rx;
+                struct {
+                        /* RDES0 */
+                        u32 payload_csum_error:1;
+                        u32 crc_error:1;
+                        u32 dribbling:1;
+                        u32 error_gmii:1;
+                        u32 receive_watchdog:1;
+                        u32 frame_type:1;
+                        u32 late_collision:1;
+                        u32 ipc_csum_error:1;
+                        u32 last_descriptor:1;
+                        u32 first_descriptor:1;
+                        u32 vlan_tag:1;
+                        u32 overflow_error:1;
+                        u32 length_error:1;
+                        u32 sa_filter_fail:1;
+                        u32 descriptor_error:1;
+                        u32 error_summary:1;
+                        u32 frame_length:14;
+                        u32 da_filter_fail:1;
+                        u32 own:1;
+                        /* RDES1 */
+                        u32 buffer1_size:13;
+                        u32 reserved1:1;
+                        u32 second_address_chained:1;
+                        u32 end_ring:1;
+                        u32 buffer2_size:13;
+                        u32 reserved2:2;
+                        u32 disable_ic:1;
+                } erx;          /* -- enhanced -- */
+
+                /* Transmit descriptor */
+                struct {
+                        /* TDES0 */
+                        u32 deferred:1;
+                        u32 underflow_error:1;
+                        u32 excessive_deferral:1;
+                        u32 collision_count:4;
+                        u32 heartbeat_fail:1;
+                        u32 excessive_collisions:1;
+                        u32 late_collision:1;
+                        u32 no_carrier:1;
+                        u32 loss_carrier:1;
+                        u32 reserved1:3;
+                        u32 error_summary:1;
+                        u32 reserved2:15;
+                        u32 own:1;
+                        /* TDES1 */
+                        u32 buffer1_size:11;
+                        u32 buffer2_size:11;
+                        u32 reserved3:1;
+                        u32 disable_padding:1;
+                        u32 second_address_chained:1;
+                        u32 end_ring:1;
+                        u32 crc_disable:1;
+                        u32 reserved4:2;
+                        u32 first_segment:1;
+                        u32 last_segment:1;
+                        u32 interrupt:1;
+                } tx;
+                struct {
+                        /* TDES0 */
+                        u32 deferred:1;
+                        u32 underflow_error:1;
+                        u32 excessive_deferral:1;
+                        u32 collision_count:4;
+                        u32 vlan_frame:1;
+                        u32 excessive_collisions:1;
+                        u32 late_collision:1;
+                        u32 no_carrier:1;
+                        u32 loss_carrier:1;
+                        u32 payload_error:1;
+                        u32 frame_flushed:1;
+                        u32 jabber_timeout:1;
+                        u32 error_summary:1;
+                        u32 ip_header_error:1;
+                        u32 time_stamp_status:1;
+                        u32 reserved1:2;
+                        u32 second_address_chained:1;
+                        u32 end_ring:1;
+                        u32 checksum_insertion:2;
+                        u32 reserved2:1;
+                        u32 time_stamp_enable:1;
+                        u32 disable_padding:1;
+                        u32 crc_disable:1;
+                        u32 first_segment:1;
+                        u32 last_segment:1;
+                        u32 interrupt:1;
+                        u32 own:1;
+                        /* TDES1 */
+                        u32 buffer1_size:13;
+                        u32 reserved3:3;
+                        u32 buffer2_size:13;
+                        u32 reserved4:3;
+                } etx;          /* -- enhanced -- */
+        } des01;
+        unsigned int des2;
+        unsigned int des3;
+};
+
+/* Transmit checksum insertion control */
+enum tdes_csum_insertion {
+        cic_disabled = 0,       /* Checksum Insertion Control */
+        cic_only_ip = 1,        /* Only IP header */
+        cic_no_pseudoheader = 2,        /* IP header but pseudoheader
+                                         * is not calculated */
+        cic_full = 3,           /* IP header and pseudoheader */
+};