343 lines
9.6 KiB
C
343 lines
9.6 KiB
C
/*******************************************************************************
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This contains the functions to handle the enhanced descriptors.
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Copyright (C) 2007-2009 STMicroelectronics Ltd
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This program is free software; you can redistribute it and/or modify it
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under the terms and conditions of the GNU General Public License,
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version 2, as published by the Free Software Foundation.
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This program is distributed in the hope it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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The full GNU General Public License is included in this distribution in
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the file called "COPYING".
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Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
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*******************************************************************************/
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#include <linux/stmmac.h>
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#include "common.h"
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#include "descs_com.h"
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static int enh_desc_get_tx_status(void *data, struct stmmac_extra_stats *x,
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struct dma_desc *p, void __iomem *ioaddr)
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{
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int ret = 0;
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struct net_device_stats *stats = (struct net_device_stats *)data;
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if (unlikely(p->des01.etx.error_summary)) {
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CHIP_DBG(KERN_ERR "GMAC TX error... 0x%08x\n", p->des01.etx);
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if (unlikely(p->des01.etx.jabber_timeout)) {
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CHIP_DBG(KERN_ERR "\tjabber_timeout error\n");
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x->tx_jabber++;
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}
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if (unlikely(p->des01.etx.frame_flushed)) {
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CHIP_DBG(KERN_ERR "\tframe_flushed error\n");
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x->tx_frame_flushed++;
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dwmac_dma_flush_tx_fifo(ioaddr);
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}
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if (unlikely(p->des01.etx.loss_carrier)) {
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CHIP_DBG(KERN_ERR "\tloss_carrier error\n");
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x->tx_losscarrier++;
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stats->tx_carrier_errors++;
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}
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if (unlikely(p->des01.etx.no_carrier)) {
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CHIP_DBG(KERN_ERR "\tno_carrier error\n");
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x->tx_carrier++;
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stats->tx_carrier_errors++;
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}
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if (unlikely(p->des01.etx.late_collision)) {
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CHIP_DBG(KERN_ERR "\tlate_collision error\n");
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stats->collisions += p->des01.etx.collision_count;
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}
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if (unlikely(p->des01.etx.excessive_collisions)) {
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CHIP_DBG(KERN_ERR "\texcessive_collisions\n");
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stats->collisions += p->des01.etx.collision_count;
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}
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if (unlikely(p->des01.etx.excessive_deferral)) {
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CHIP_DBG(KERN_INFO "\texcessive tx_deferral\n");
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x->tx_deferred++;
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}
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if (unlikely(p->des01.etx.underflow_error)) {
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CHIP_DBG(KERN_ERR "\tunderflow error\n");
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dwmac_dma_flush_tx_fifo(ioaddr);
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x->tx_underflow++;
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}
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if (unlikely(p->des01.etx.ip_header_error)) {
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CHIP_DBG(KERN_ERR "\tTX IP header csum error\n");
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x->tx_ip_header_error++;
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}
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if (unlikely(p->des01.etx.payload_error)) {
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CHIP_DBG(KERN_ERR "\tAddr/Payload csum error\n");
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x->tx_payload_error++;
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dwmac_dma_flush_tx_fifo(ioaddr);
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}
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ret = -1;
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}
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if (unlikely(p->des01.etx.deferred)) {
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CHIP_DBG(KERN_INFO "GMAC TX status: tx deferred\n");
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x->tx_deferred++;
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}
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#ifdef STMMAC_VLAN_TAG_USED
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if (p->des01.etx.vlan_frame) {
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CHIP_DBG(KERN_INFO "GMAC TX status: VLAN frame\n");
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x->tx_vlan++;
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}
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#endif
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return ret;
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}
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static int enh_desc_get_tx_len(struct dma_desc *p)
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{
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return p->des01.etx.buffer1_size;
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}
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static int enh_desc_coe_rdes0(int ipc_err, int type, int payload_err)
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{
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int ret = good_frame;
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u32 status = (type << 2 | ipc_err << 1 | payload_err) & 0x7;
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/* bits 5 7 0 | Frame status
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* ----------------------------------------------------------
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* 0 0 0 | IEEE 802.3 Type frame (length < 1536 octects)
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* 1 0 0 | IPv4/6 No CSUM errorS.
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* 1 0 1 | IPv4/6 CSUM PAYLOAD error
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* 1 1 0 | IPv4/6 CSUM IP HR error
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* 1 1 1 | IPv4/6 IP PAYLOAD AND HEADER errorS
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* 0 0 1 | IPv4/6 unsupported IP PAYLOAD
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* 0 1 1 | COE bypassed.. no IPv4/6 frame
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* 0 1 0 | Reserved.
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*/
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if (status == 0x0) {
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CHIP_DBG(KERN_INFO "RX Des0 status: IEEE 802.3 Type frame.\n");
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ret = llc_snap;
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} else if (status == 0x4) {
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CHIP_DBG(KERN_INFO "RX Des0 status: IPv4/6 No CSUM errorS.\n");
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ret = good_frame;
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} else if (status == 0x5) {
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CHIP_DBG(KERN_ERR "RX Des0 status: IPv4/6 Payload Error.\n");
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ret = csum_none;
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} else if (status == 0x6) {
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CHIP_DBG(KERN_ERR "RX Des0 status: IPv4/6 Header Error.\n");
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ret = csum_none;
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} else if (status == 0x7) {
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CHIP_DBG(KERN_ERR
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"RX Des0 status: IPv4/6 Header and Payload Error.\n");
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ret = csum_none;
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} else if (status == 0x1) {
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CHIP_DBG(KERN_ERR
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"RX Des0 status: IPv4/6 unsupported IP PAYLOAD.\n");
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ret = discard_frame;
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} else if (status == 0x3) {
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CHIP_DBG(KERN_ERR "RX Des0 status: No IPv4, IPv6 frame.\n");
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ret = discard_frame;
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}
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return ret;
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}
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static int enh_desc_get_rx_status(void *data, struct stmmac_extra_stats *x,
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struct dma_desc *p)
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{
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int ret = good_frame;
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struct net_device_stats *stats = (struct net_device_stats *)data;
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if (unlikely(p->des01.erx.error_summary)) {
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CHIP_DBG(KERN_ERR "GMAC RX Error Summary 0x%08x\n",
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p->des01.erx);
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if (unlikely(p->des01.erx.descriptor_error)) {
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CHIP_DBG(KERN_ERR "\tdescriptor error\n");
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x->rx_desc++;
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stats->rx_length_errors++;
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}
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if (unlikely(p->des01.erx.overflow_error)) {
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CHIP_DBG(KERN_ERR "\toverflow error\n");
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x->rx_gmac_overflow++;
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}
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if (unlikely(p->des01.erx.ipc_csum_error))
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CHIP_DBG(KERN_ERR "\tIPC Csum Error/Giant frame\n");
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if (unlikely(p->des01.erx.late_collision)) {
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CHIP_DBG(KERN_ERR "\tlate_collision error\n");
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stats->collisions++;
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stats->collisions++;
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}
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if (unlikely(p->des01.erx.receive_watchdog)) {
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CHIP_DBG(KERN_ERR "\treceive_watchdog error\n");
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x->rx_watchdog++;
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}
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if (unlikely(p->des01.erx.error_gmii)) {
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CHIP_DBG(KERN_ERR "\tReceive Error\n");
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x->rx_mii++;
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}
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if (unlikely(p->des01.erx.crc_error)) {
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CHIP_DBG(KERN_ERR "\tCRC error\n");
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x->rx_crc++;
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stats->rx_crc_errors++;
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}
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ret = discard_frame;
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}
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/* After a payload csum error, the ES bit is set.
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* It doesn't match with the information reported into the databook.
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* At any rate, we need to understand if the CSUM hw computation is ok
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* and report this info to the upper layers. */
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ret = enh_desc_coe_rdes0(p->des01.erx.ipc_csum_error,
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p->des01.erx.frame_type, p->des01.erx.payload_csum_error);
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if (unlikely(p->des01.erx.dribbling)) {
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CHIP_DBG(KERN_ERR "GMAC RX: dribbling error\n");
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x->dribbling_bit++;
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}
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if (unlikely(p->des01.erx.sa_filter_fail)) {
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CHIP_DBG(KERN_ERR "GMAC RX : Source Address filter fail\n");
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x->sa_rx_filter_fail++;
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ret = discard_frame;
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}
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if (unlikely(p->des01.erx.da_filter_fail)) {
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CHIP_DBG(KERN_ERR "GMAC RX : Dest Address filter fail\n");
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x->da_rx_filter_fail++;
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ret = discard_frame;
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}
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if (unlikely(p->des01.erx.length_error)) {
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CHIP_DBG(KERN_ERR "GMAC RX: length_error error\n");
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x->rx_length++;
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ret = discard_frame;
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}
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#ifdef STMMAC_VLAN_TAG_USED
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if (p->des01.erx.vlan_tag) {
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CHIP_DBG(KERN_INFO "GMAC RX: VLAN frame tagged\n");
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x->rx_vlan++;
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}
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#endif
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return ret;
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}
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static void enh_desc_init_rx_desc(struct dma_desc *p, unsigned int ring_size,
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int disable_rx_ic)
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{
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int i;
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for (i = 0; i < ring_size; i++) {
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p->des01.erx.own = 1;
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p->des01.erx.buffer1_size = BUF_SIZE_8KiB - 1;
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ehn_desc_rx_set_on_ring_chain(p, (i == ring_size - 1));
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if (disable_rx_ic)
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p->des01.erx.disable_ic = 1;
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p++;
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}
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}
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static void enh_desc_init_tx_desc(struct dma_desc *p, unsigned int ring_size)
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{
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int i;
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for (i = 0; i < ring_size; i++) {
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p->des01.etx.own = 0;
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ehn_desc_tx_set_on_ring_chain(p, (i == ring_size - 1));
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p++;
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}
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}
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static int enh_desc_get_tx_owner(struct dma_desc *p)
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{
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return p->des01.etx.own;
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}
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static int enh_desc_get_rx_owner(struct dma_desc *p)
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{
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return p->des01.erx.own;
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}
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static void enh_desc_set_tx_owner(struct dma_desc *p)
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{
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p->des01.etx.own = 1;
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}
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static void enh_desc_set_rx_owner(struct dma_desc *p)
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{
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p->des01.erx.own = 1;
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}
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static int enh_desc_get_tx_ls(struct dma_desc *p)
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{
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return p->des01.etx.last_segment;
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}
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static void enh_desc_release_tx_desc(struct dma_desc *p)
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{
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int ter = p->des01.etx.end_ring;
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memset(p, 0, offsetof(struct dma_desc, des2));
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enh_desc_end_tx_desc(p, ter);
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}
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static void enh_desc_prepare_tx_desc(struct dma_desc *p, int is_fs, int len,
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int csum_flag)
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{
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p->des01.etx.first_segment = is_fs;
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enh_set_tx_desc_len(p, len);
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if (likely(csum_flag))
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p->des01.etx.checksum_insertion = cic_full;
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}
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static void enh_desc_clear_tx_ic(struct dma_desc *p)
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{
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p->des01.etx.interrupt = 0;
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}
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static void enh_desc_close_tx_desc(struct dma_desc *p)
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{
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p->des01.etx.last_segment = 1;
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p->des01.etx.interrupt = 1;
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}
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static int enh_desc_get_rx_frame_len(struct dma_desc *p, int rx_coe_type)
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{
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/* The type-1 checksum offload engines append the checksum at
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* the end of frame and the two bytes of checksum are added in
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* the length.
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* Adjust for that in the framelen for type-1 checksum offload
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* engines. */
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if (rx_coe_type == STMMAC_RX_COE_TYPE1)
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return p->des01.erx.frame_length - 2;
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else
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return p->des01.erx.frame_length;
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}
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const struct stmmac_desc_ops enh_desc_ops = {
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.tx_status = enh_desc_get_tx_status,
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.rx_status = enh_desc_get_rx_status,
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.get_tx_len = enh_desc_get_tx_len,
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.init_rx_desc = enh_desc_init_rx_desc,
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.init_tx_desc = enh_desc_init_tx_desc,
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.get_tx_owner = enh_desc_get_tx_owner,
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.get_rx_owner = enh_desc_get_rx_owner,
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.release_tx_desc = enh_desc_release_tx_desc,
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.prepare_tx_desc = enh_desc_prepare_tx_desc,
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.clear_tx_ic = enh_desc_clear_tx_ic,
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.close_tx_desc = enh_desc_close_tx_desc,
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.get_tx_ls = enh_desc_get_tx_ls,
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.set_tx_owner = enh_desc_set_tx_owner,
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.set_rx_owner = enh_desc_set_rx_owner,
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.get_rx_frame_len = enh_desc_get_rx_frame_len,
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};
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