| /******************************************************************************* |
| This contains the functions to handle the enhanced descriptors. |
| |
| Copyright (C) 2007-2009 STMicroelectronics Ltd |
| |
| 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> |
| *******************************************************************************/ |
| |
| #include <linux/stmmac.h> |
| #include "common.h" |
| #include "descs_com.h" |
| |
| static int enh_desc_get_tx_status(void *data, struct stmmac_extra_stats *x, |
| struct dma_desc *p, void __iomem *ioaddr) |
| { |
| int ret = 0; |
| struct net_device_stats *stats = (struct net_device_stats *)data; |
| |
| if (unlikely(p->des01.etx.error_summary)) { |
| if (unlikely(p->des01.etx.jabber_timeout)) |
| x->tx_jabber++; |
| |
| if (unlikely(p->des01.etx.frame_flushed)) { |
| x->tx_frame_flushed++; |
| dwmac_dma_flush_tx_fifo(ioaddr); |
| } |
| |
| if (unlikely(p->des01.etx.loss_carrier)) { |
| x->tx_losscarrier++; |
| stats->tx_carrier_errors++; |
| } |
| if (unlikely(p->des01.etx.no_carrier)) { |
| x->tx_carrier++; |
| stats->tx_carrier_errors++; |
| } |
| if (unlikely(p->des01.etx.late_collision)) |
| stats->collisions += p->des01.etx.collision_count; |
| |
| if (unlikely(p->des01.etx.excessive_collisions)) |
| stats->collisions += p->des01.etx.collision_count; |
| |
| if (unlikely(p->des01.etx.excessive_deferral)) |
| x->tx_deferred++; |
| |
| if (unlikely(p->des01.etx.underflow_error)) { |
| dwmac_dma_flush_tx_fifo(ioaddr); |
| x->tx_underflow++; |
| } |
| |
| if (unlikely(p->des01.etx.ip_header_error)) |
| x->tx_ip_header_error++; |
| |
| if (unlikely(p->des01.etx.payload_error)) { |
| x->tx_payload_error++; |
| dwmac_dma_flush_tx_fifo(ioaddr); |
| } |
| |
| ret = -1; |
| } |
| |
| if (unlikely(p->des01.etx.deferred)) |
| x->tx_deferred++; |
| |
| #ifdef STMMAC_VLAN_TAG_USED |
| if (p->des01.etx.vlan_frame) |
| x->tx_vlan++; |
| #endif |
| |
| return ret; |
| } |
| |
| static int enh_desc_get_tx_len(struct dma_desc *p) |
| { |
| return p->des01.etx.buffer1_size; |
| } |
| |
| static int enh_desc_coe_rdes0(int ipc_err, int type, int payload_err) |
| { |
| int ret = good_frame; |
| u32 status = (type << 2 | ipc_err << 1 | payload_err) & 0x7; |
| |
| /* bits 5 7 0 | Frame status |
| * ---------------------------------------------------------- |
| * 0 0 0 | IEEE 802.3 Type frame (length < 1536 octects) |
| * 1 0 0 | IPv4/6 No CSUM errorS. |
| * 1 0 1 | IPv4/6 CSUM PAYLOAD error |
| * 1 1 0 | IPv4/6 CSUM IP HR error |
| * 1 1 1 | IPv4/6 IP PAYLOAD AND HEADER errorS |
| * 0 0 1 | IPv4/6 unsupported IP PAYLOAD |
| * 0 1 1 | COE bypassed.. no IPv4/6 frame |
| * 0 1 0 | Reserved. |
| */ |
| if (status == 0x0) |
| ret = llc_snap; |
| else if (status == 0x4) |
| ret = good_frame; |
| else if (status == 0x5) |
| ret = csum_none; |
| else if (status == 0x6) |
| ret = csum_none; |
| else if (status == 0x7) |
| ret = csum_none; |
| else if (status == 0x1) |
| ret = discard_frame; |
| else if (status == 0x3) |
| ret = discard_frame; |
| return ret; |
| } |
| |
| static void enh_desc_get_ext_status(void *data, struct stmmac_extra_stats *x, |
| struct dma_extended_desc *p) |
| { |
| if (unlikely(p->basic.des01.erx.rx_mac_addr)) { |
| if (p->des4.erx.ip_hdr_err) |
| x->ip_hdr_err++; |
| if (p->des4.erx.ip_payload_err) |
| x->ip_payload_err++; |
| if (p->des4.erx.ip_csum_bypassed) |
| x->ip_csum_bypassed++; |
| if (p->des4.erx.ipv4_pkt_rcvd) |
| x->ipv4_pkt_rcvd++; |
| if (p->des4.erx.ipv6_pkt_rcvd) |
| x->ipv6_pkt_rcvd++; |
| if (p->des4.erx.msg_type == RDES_EXT_SYNC) |
| x->rx_msg_type_sync++; |
| else if (p->des4.erx.msg_type == RDES_EXT_FOLLOW_UP) |
| x->rx_msg_type_follow_up++; |
| else if (p->des4.erx.msg_type == RDES_EXT_DELAY_REQ) |
| x->rx_msg_type_delay_req++; |
| else if (p->des4.erx.msg_type == RDES_EXT_DELAY_RESP) |
| x->rx_msg_type_delay_resp++; |
| else if (p->des4.erx.msg_type == RDES_EXT_PDELAY_REQ) |
| x->rx_msg_type_pdelay_req++; |
| else if (p->des4.erx.msg_type == RDES_EXT_PDELAY_RESP) |
| x->rx_msg_type_pdelay_resp++; |
| else if (p->des4.erx.msg_type == RDES_EXT_PDELAY_FOLLOW_UP) |
| x->rx_msg_type_pdelay_follow_up++; |
| else |
| x->rx_msg_type_ext_no_ptp++; |
| if (p->des4.erx.ptp_frame_type) |
| x->ptp_frame_type++; |
| if (p->des4.erx.ptp_ver) |
| x->ptp_ver++; |
| if (p->des4.erx.timestamp_dropped) |
| x->timestamp_dropped++; |
| if (p->des4.erx.av_pkt_rcvd) |
| x->av_pkt_rcvd++; |
| if (p->des4.erx.av_tagged_pkt_rcvd) |
| x->av_tagged_pkt_rcvd++; |
| if (p->des4.erx.vlan_tag_priority_val) |
| x->vlan_tag_priority_val++; |
| if (p->des4.erx.l3_filter_match) |
| x->l3_filter_match++; |
| if (p->des4.erx.l4_filter_match) |
| x->l4_filter_match++; |
| if (p->des4.erx.l3_l4_filter_no_match) |
| x->l3_l4_filter_no_match++; |
| } |
| } |
| |
| static int enh_desc_get_rx_status(void *data, struct stmmac_extra_stats *x, |
| struct dma_desc *p) |
| { |
| int ret = good_frame; |
| struct net_device_stats *stats = (struct net_device_stats *)data; |
| |
| if (unlikely(p->des01.erx.error_summary)) { |
| if (unlikely(p->des01.erx.descriptor_error)) { |
| x->rx_desc++; |
| stats->rx_length_errors++; |
| } |
| if (unlikely(p->des01.erx.overflow_error)) |
| x->rx_gmac_overflow++; |
| |
| if (unlikely(p->des01.erx.ipc_csum_error)) |
| pr_err("\tIPC Csum Error/Giant frame\n"); |
| |
| if (unlikely(p->des01.erx.late_collision)) { |
| stats->collisions++; |
| } |
| if (unlikely(p->des01.erx.receive_watchdog)) |
| x->rx_watchdog++; |
| |
| if (unlikely(p->des01.erx.error_gmii)) |
| x->rx_mii++; |
| |
| if (unlikely(p->des01.erx.crc_error)) { |
| x->rx_crc++; |
| stats->rx_crc_errors++; |
| } |
| ret = discard_frame; |
| } |
| |
| /* After a payload csum error, the ES bit is set. |
| * It doesn't match with the information reported into the databook. |
| * At any rate, we need to understand if the CSUM hw computation is ok |
| * and report this info to the upper layers. */ |
| ret = enh_desc_coe_rdes0(p->des01.erx.ipc_csum_error, |
| p->des01.erx.frame_type, p->des01.erx.rx_mac_addr); |
| |
| if (unlikely(p->des01.erx.dribbling)) |
| x->dribbling_bit++; |
| |
| if (unlikely(p->des01.erx.sa_filter_fail)) { |
| x->sa_rx_filter_fail++; |
| ret = discard_frame; |
| } |
| if (unlikely(p->des01.erx.da_filter_fail)) { |
| x->da_rx_filter_fail++; |
| ret = discard_frame; |
| } |
| if (unlikely(p->des01.erx.length_error)) { |
| x->rx_length++; |
| ret = discard_frame; |
| } |
| #ifdef STMMAC_VLAN_TAG_USED |
| if (p->des01.erx.vlan_tag) |
| x->rx_vlan++; |
| #endif |
| |
| return ret; |
| } |
| |
| static void enh_desc_init_rx_desc(struct dma_desc *p, int disable_rx_ic, |
| int mode, int end) |
| { |
| p->des01.erx.own = 1; |
| p->des01.erx.buffer1_size = BUF_SIZE_8KiB - 1; |
| |
| if (mode == STMMAC_CHAIN_MODE) |
| ehn_desc_rx_set_on_chain(p, end); |
| else |
| ehn_desc_rx_set_on_ring(p, end); |
| |
| if (disable_rx_ic) |
| p->des01.erx.disable_ic = 1; |
| } |
| |
| static void enh_desc_init_tx_desc(struct dma_desc *p, int mode, int end) |
| { |
| p->des01.etx.own = 0; |
| if (mode == STMMAC_CHAIN_MODE) |
| ehn_desc_tx_set_on_chain(p, end); |
| else |
| ehn_desc_tx_set_on_ring(p, end); |
| } |
| |
| static int enh_desc_get_tx_owner(struct dma_desc *p) |
| { |
| return p->des01.etx.own; |
| } |
| |
| static int enh_desc_get_rx_owner(struct dma_desc *p) |
| { |
| return p->des01.erx.own; |
| } |
| |
| static void enh_desc_set_tx_owner(struct dma_desc *p) |
| { |
| p->des01.etx.own = 1; |
| } |
| |
| static void enh_desc_set_rx_owner(struct dma_desc *p) |
| { |
| p->des01.erx.own = 1; |
| } |
| |
| static int enh_desc_get_tx_ls(struct dma_desc *p) |
| { |
| return p->des01.etx.last_segment; |
| } |
| |
| static void enh_desc_release_tx_desc(struct dma_desc *p, int mode) |
| { |
| int ter = p->des01.etx.end_ring; |
| |
| memset(p, 0, offsetof(struct dma_desc, des2)); |
| if (mode == STMMAC_CHAIN_MODE) |
| enh_desc_end_tx_desc_on_chain(p, ter); |
| else |
| enh_desc_end_tx_desc_on_ring(p, ter); |
| } |
| |
| static void enh_desc_prepare_tx_desc(struct dma_desc *p, int is_fs, int len, |
| int csum_flag, int mode) |
| { |
| p->des01.etx.first_segment = is_fs; |
| |
| if (mode == STMMAC_CHAIN_MODE) |
| enh_set_tx_desc_len_on_chain(p, len); |
| else |
| enh_set_tx_desc_len_on_ring(p, len); |
| |
| if (likely(csum_flag)) |
| p->des01.etx.checksum_insertion = cic_full; |
| } |
| |
| static void enh_desc_clear_tx_ic(struct dma_desc *p) |
| { |
| p->des01.etx.interrupt = 0; |
| } |
| |
| static void enh_desc_close_tx_desc(struct dma_desc *p) |
| { |
| p->des01.etx.last_segment = 1; |
| p->des01.etx.interrupt = 1; |
| } |
| |
| static int enh_desc_get_rx_frame_len(struct dma_desc *p, int rx_coe_type) |
| { |
| /* The type-1 checksum offload engines append the checksum at |
| * the end of frame and the two bytes of checksum are added in |
| * the length. |
| * Adjust for that in the framelen for type-1 checksum offload |
| * engines. */ |
| if (rx_coe_type == STMMAC_RX_COE_TYPE1) |
| return p->des01.erx.frame_length - 2; |
| else |
| return p->des01.erx.frame_length; |
| } |
| |
| static void enh_desc_enable_tx_timestamp(struct dma_desc *p) |
| { |
| p->des01.etx.time_stamp_enable = 1; |
| } |
| |
| static int enh_desc_get_tx_timestamp_status(struct dma_desc *p) |
| { |
| return p->des01.etx.time_stamp_status; |
| } |
| |
| static u64 enh_desc_get_timestamp(void *desc, u32 ats) |
| { |
| u64 ns; |
| |
| if (ats) { |
| struct dma_extended_desc *p = (struct dma_extended_desc *)desc; |
| ns = p->des6; |
| /* convert high/sec time stamp value to nanosecond */ |
| ns += p->des7 * 1000000000ULL; |
| } else { |
| struct dma_desc *p = (struct dma_desc *)desc; |
| ns = p->des2; |
| ns += p->des3 * 1000000000ULL; |
| } |
| |
| return ns; |
| } |
| |
| static int enh_desc_get_rx_timestamp_status(void *desc, u32 ats) |
| { |
| if (ats) { |
| struct dma_extended_desc *p = (struct dma_extended_desc *)desc; |
| return p->basic.des01.erx.ipc_csum_error; |
| } else { |
| struct dma_desc *p = (struct dma_desc *)desc; |
| if ((p->des2 == 0xffffffff) && (p->des3 == 0xffffffff)) |
| /* timestamp is corrupted, hence don't store it */ |
| return 0; |
| else |
| return 1; |
| } |
| } |
| |
| const struct stmmac_desc_ops enh_desc_ops = { |
| .tx_status = enh_desc_get_tx_status, |
| .rx_status = enh_desc_get_rx_status, |
| .get_tx_len = enh_desc_get_tx_len, |
| .init_rx_desc = enh_desc_init_rx_desc, |
| .init_tx_desc = enh_desc_init_tx_desc, |
| .get_tx_owner = enh_desc_get_tx_owner, |
| .get_rx_owner = enh_desc_get_rx_owner, |
| .release_tx_desc = enh_desc_release_tx_desc, |
| .prepare_tx_desc = enh_desc_prepare_tx_desc, |
| .clear_tx_ic = enh_desc_clear_tx_ic, |
| .close_tx_desc = enh_desc_close_tx_desc, |
| .get_tx_ls = enh_desc_get_tx_ls, |
| .set_tx_owner = enh_desc_set_tx_owner, |
| .set_rx_owner = enh_desc_set_rx_owner, |
| .get_rx_frame_len = enh_desc_get_rx_frame_len, |
| .rx_extended_status = enh_desc_get_ext_status, |
| .enable_tx_timestamp = enh_desc_enable_tx_timestamp, |
| .get_tx_timestamp_status = enh_desc_get_tx_timestamp_status, |
| .get_timestamp = enh_desc_get_timestamp, |
| .get_rx_timestamp_status = enh_desc_get_rx_timestamp_status, |
| }; |