// SPDX-License-Identifier: GPL-2.0-only
/* 10G controller driver for Samsung SoCs
*
* Copyright (C) 2013 Samsung Electronics Co., Ltd.
* http://www.samsung.com
*
* Author: Siva Reddy Kallam <siva.kallam@samsung.com>
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/bitops.h>
#include <linux/export.h>
#include <linux/io.h>
#include <linux/netdevice.h>
#include <linux/phy.h>
#include "sxgbe_common.h"
#include "sxgbe_dma.h"
#include "sxgbe_desc.h"
/* DMA TX descriptor ring initialization */
static void sxgbe_init_tx_desc(struct sxgbe_tx_norm_desc *p)
{
p->tdes23.tx_rd_des23.own_bit = 0;
}
static void sxgbe_tx_desc_enable_tse(struct sxgbe_tx_norm_desc *p, u8 is_tse,
u32 total_hdr_len, u32 tcp_hdr_len,
u32 tcp_payload_len)
{
p->tdes23.tx_rd_des23.tse_bit = is_tse;
p->tdes23.tx_rd_des23.buf1_size = total_hdr_len;
p->tdes23.tx_rd_des23.tcp_hdr_len = tcp_hdr_len / 4;
p->tdes23.tx_rd_des23.tx_pkt_len.tcp_payload_len = tcp_payload_len;
}
/* Assign buffer lengths for descriptor */
static void sxgbe_prepare_tx_desc(struct sxgbe_tx_norm_desc *p, u8 is_fd,
int buf1_len, int pkt_len, int cksum)
{
p->tdes23.tx_rd_des23.first_desc = is_fd;
p->tdes23.tx_rd_des23.buf1_size = buf1_len;
p->tdes23.tx_rd_des23.tx_pkt_len.pkt_len.total_pkt_len = pkt_len;
if (cksum)
p->tdes23.tx_rd_des23.cksum_ctl = cic_full;
}
/* Set VLAN control information */
static void sxgbe_tx_vlanctl_desc(struct sxgbe_tx_norm_desc *p, int vlan_ctl)
{
p->tdes23.tx_rd_des23.vlan_tag_ctl = vlan_ctl;
}
/* Set the owner of Normal descriptor */
static void sxgbe_set_tx_owner(struct sxgbe_tx_norm_desc *p)
{
p->tdes23.tx_rd_des23.own_bit = 1;
}
/* Get the owner of Normal descriptor */
static int sxgbe_get_tx_owner(struct sxgbe_tx_norm_desc *p)
{
return p->tdes23.tx_rd_des23.own_bit;
}
/* Invoked by the xmit function to close the tx descriptor */
static void sxgbe_close_tx_desc(struct sxgbe_tx_norm_desc *p)
{
p->tdes23.tx_rd_des23.last_desc = 1;
p->tdes23.tx_rd_des23.int_on_com = 1;
}
/* Clean the tx descriptor as soon as the tx irq is received */
static void sxgbe_release_tx_desc(struct sxgbe_tx_norm_desc *p)
{
memset(p, 0, sizeof(*p));
}
/* Clear interrupt on tx frame completion. When this bit is
* set an interrupt happens as soon as the frame is transmitted
*/
static void sxgbe_clear_tx_ic(struct sxgbe_tx_norm_desc *p)
{
p->tdes23.tx_rd_des23.int_on_com = 0;
}
/* Last tx segment reports the transmit status */
static int sxgbe_get_tx_ls(struct sxgbe_tx_norm_desc *p)
{
return p->tdes23.tx_rd_des23.last_desc;
}
/* Get the buffer size from the descriptor */
static int sxgbe_get_tx_len(struct sxgbe_tx_norm_desc *p)
{
return p->tdes23.tx_rd_des23.buf1_size;
}
/* Set tx timestamp enable bit */
static void sxgbe_tx_enable_tstamp(struct sxgbe_tx_norm_desc *p)
{
p->tdes23.tx_rd_des23.timestmp_enable = 1;
}
/* get tx timestamp status */
static int sxgbe_get_tx_timestamp_status(struct sxgbe_tx_norm_desc *p)
{
return p->tdes23.tx_rd_des23.timestmp_enable;
}
/* TX Context Descripto Specific */
static void sxgbe_tx_ctxt_desc_set_ctxt(struct sxgbe_tx_ctxt_desc *p)
{
p->ctxt_bit = 1;
}
/* Set the owner of TX context descriptor */
static void sxgbe_tx_ctxt_desc_set_owner(struct sxgbe_tx_ctxt_desc *p)
{
p->own_bit = 1;
}
/* Get the owner of TX context descriptor */
static int sxgbe_tx_ctxt_desc_get_owner(struct sxgbe_tx_ctxt_desc *p)
{
return p->own_bit;
}
/* Set TX mss in TX context Descriptor */
static void sxgbe_tx_ctxt_desc_set_mss(struct sxgbe_tx_ctxt_desc *p, u16 mss)
{
p->maxseg_size = mss;
}
/* Get TX mss from TX context Descriptor */
static int sxgbe_tx_ctxt_desc_get_mss(struct sxgbe_tx_ctxt_desc *p)
{
return p->maxseg_size;
}
/* Set TX tcmssv in TX context Descriptor */
static void sxgbe_tx_ctxt_desc_set_tcmssv(struct sxgbe_tx_ctxt_desc *p)
{
p->tcmssv = 1;
}
/* Reset TX ostc in TX context Descriptor */
static void sxgbe_tx_ctxt_desc_reset_ostc(struct sxgbe_tx_ctxt_desc *p)
{
p->ostc = 0;
}
/* Set IVLAN information */
static void sxgbe_tx_ctxt_desc_set_ivlantag(struct sxgbe_tx_ctxt_desc *p,
int is_ivlanvalid, int ivlan_tag,
int ivlan_ctl)
{
if (is_ivlanvalid) {
p->ivlan_tag_valid = is_ivlanvalid;
p->ivlan_tag = ivlan_tag;
p->ivlan_tag_ctl = ivlan_ctl;
}
}
/* Return IVLAN Tag */
static int sxgbe_tx_ctxt_desc_get_ivlantag(struct sxgbe_tx_ctxt_desc *p)
{
return p->ivlan_tag;
}
/* Set VLAN Tag */
static void sxgbe_tx_ctxt_desc_set_vlantag(struct sxgbe_tx_ctxt_desc *p,
int is_vlanvalid, int vlan_tag)
{
if (is_vlanvalid) {
p->vltag_valid = is_vlanvalid;
p->vlan_tag = vlan_tag;
}
}
/* Return VLAN Tag */
static int sxgbe_tx_ctxt_desc_get_vlantag(struct sxgbe_tx_ctxt_desc *p)
{
return p->vlan_tag;
}
/* Set Time stamp */
static void sxgbe_tx_ctxt_desc_set_tstamp(struct sxgbe_tx_ctxt_desc *p,
u8 ostc_enable, u64 tstamp)
{
if (ostc_enable) {
p->ostc = ostc_enable;
p->tstamp_lo = (u32) tstamp;
p->tstamp_hi = (u32) (tstamp>>32);
}
}
/* Close TX context descriptor */
static void sxgbe_tx_ctxt_desc_close(struct sxgbe_tx_ctxt_desc *p)
{
p->own_bit = 1;
}
/* WB status of context descriptor */
static int sxgbe_tx_ctxt_desc_get_cde(struct sxgbe_tx_ctxt_desc *p)
{
return p->ctxt_desc_err;
}
/* DMA RX descriptor ring initialization */
static void sxgbe_init_rx_desc(struct sxgbe_rx_norm_desc *p, int disable_rx_ic,
int mode, int end)
{
p->rdes23.rx_rd_des23.own_bit = 1;
if (disable_rx_ic)
p->rdes23.rx_rd_des23.int_on_com = disable_rx_ic;
}
/* Get RX own bit */
static int sxgbe_get_rx_owner(struct sxgbe_rx_norm_desc *p)
{
return p->rdes23.rx_rd_des23.own_bit;
}
/* Set RX own bit */
static void sxgbe_set_rx_owner(struct sxgbe_rx_norm_desc *p)
{
p->rdes23.rx_rd_des23.own_bit = 1;
}
/* Set Interrupt on completion bit */
static void sxgbe_set_rx_int_on_com(struct sxgbe_rx_norm_desc *p)
{
p->rdes23.rx_rd_des23.int_on_com = 1;
}
/* Get the receive frame size */
static int sxgbe_get_rx_frame_len(struct sxgbe_rx_norm_desc *p)
{
return p->rdes23.rx_wb_des23.pkt_len;
}
/* Return first Descriptor status */
static int sxgbe_get_rx_fd_status(struct sxgbe_rx_norm_desc *p)
{
return p->rdes23.rx_wb_des23.first_desc;
}
/* Return Last Descriptor status */
static int sxgbe_get_rx_ld_status(struct sxgbe_rx_norm_desc *p)
{
return p->rdes23.rx_wb_des23.last_desc;
}
/* Return the RX status looking at the WB fields */
static int sxgbe_rx_wbstatus(struct sxgbe_rx_norm_desc *p,
struct sxgbe_extra_stats *x, int *checksum)
{
int status = 0;
*checksum = CHECKSUM_UNNECESSARY;
if (p->rdes23.rx_wb_des23.err_summary) {
switch (p->rdes23.rx_wb_des23.err_l2_type) {
case RX_GMII_ERR:
status = -EINVAL;
x->rx_code_gmii_err++;
break;
case RX_WATCHDOG_ERR:
status = -EINVAL;
x->rx_watchdog_err++;
break;
case RX_CRC_ERR:
status = -EINVAL;
x->rx_crc_err++;
break;
case RX_GAINT_ERR:
status = -EINVAL;
x->rx_gaint_pkt_err++;
break;
case RX_IP_HDR_ERR:
*checksum = CHECKSUM_NONE;
x->ip_hdr_err++;
break;
case RX_PAYLOAD_ERR:
*checksum = CHECKSUM_NONE;
x->ip_payload_err++;
break;
case RX_OVERFLOW_ERR:
status = -EINVAL;
x->overflow_error++;
break;
default:
pr_err("Invalid Error type\n");
break;
}
} else {
switch (p->rdes23.rx_wb_des23.err_l2_type) {
case RX_LEN_PKT:
x->len_pkt++;
break;
case RX_MACCTL_PKT:
x->mac_ctl_pkt++;
break;
case RX_DCBCTL_PKT:
x->dcb_ctl_pkt++;
break;
case RX_ARP_PKT:
x->arp_pkt++;
break;
case RX_OAM_PKT:
x->oam_pkt++;
break;
case RX_UNTAG_PKT:
x->untag_okt++;
break;
case RX_OTHER_PKT:
x->other_pkt++;
break;
case RX_SVLAN_PKT:
x->svlan_tag_pkt++;
break;
case RX_CVLAN_PKT:
x->cvlan_tag_pkt++;
break;
case RX_DVLAN_OCVLAN_ICVLAN_PKT:
x->dvlan_ocvlan_icvlan_pkt++;
break;
case RX_DVLAN_OSVLAN_ISVLAN_PKT:
x->dvlan_osvlan_isvlan_pkt++;
break;
case RX_DVLAN_OSVLAN_ICVLAN_PKT:
x->dvlan_osvlan_icvlan_pkt++;
break;
case RX_DVLAN_OCVLAN_ISVLAN_PKT:
x->dvlan_ocvlan_icvlan_pkt++;
break;
default:
pr_err("Invalid L2 Packet type\n");
break;
}
}
/* L3/L4 Pkt type */
switch (p->rdes23.rx_wb_des23.layer34_pkt_type) {
case RX_NOT_IP_PKT:
x->not_ip_pkt++;
break;
case RX_IPV4_TCP_PKT:
x->ip4_tcp_pkt++;
break;
case RX_IPV4_UDP_PKT:
x->ip4_udp_pkt++;
break;
case RX_IPV4_ICMP_PKT:
x->ip4_icmp_pkt++;
break;
case RX_IPV4_UNKNOWN_PKT:
x->ip4_unknown_pkt++;
break;
case RX_IPV6_TCP_PKT:
x->ip6_tcp_pkt++;
break;
case RX_IPV6_UDP_PKT:
x->ip6_udp_pkt++;
break;
case RX_IPV6_ICMP_PKT:
x->ip6_icmp_pkt++;
break;
case RX_IPV6_UNKNOWN_PKT:
x->ip6_unknown_pkt++;
break;
default:
pr_err("Invalid L3/L4 Packet type\n");
break;
}
/* Filter */
if (p->rdes23.rx_wb_des23.vlan_filter_match)
x->vlan_filter_match++;
if (p->rdes23.rx_wb_des23.sa_filter_fail) {
status = -EINVAL;
x->sa_filter_fail++;
}
if (p->rdes23.rx_wb_des23.da_filter_fail) {
status = -EINVAL;
x->da_filter_fail++;
}
if (p->rdes23.rx_wb_des23.hash_filter_pass)
x->hash_filter_pass++;
if (p->rdes23.rx_wb_des23.l3_filter_match)
x->l3_filter_match++;
if (p->rdes23.rx_wb_des23.l4_filter_match)
x->l4_filter_match++;
return status;
}
/* Get own bit of context descriptor */
static int sxgbe_get_rx_ctxt_owner(struct sxgbe_rx_ctxt_desc *p)
{
return p->own_bit;
}
/* Set own bit for context descriptor */
static void sxgbe_set_ctxt_rx_owner(struct sxgbe_rx_ctxt_desc *p)
{
p->own_bit = 1;
}
/* Return the reception status looking at Context control information */
static void sxgbe_rx_ctxt_wbstatus(struct sxgbe_rx_ctxt_desc *p,
struct sxgbe_extra_stats *x)
{
if (p->tstamp_dropped)
x->timestamp_dropped++;
/* ptp */
if (p->ptp_msgtype == RX_NO_PTP)
x->rx_msg_type_no_ptp++;
else if (p->ptp_msgtype == RX_PTP_SYNC)
x->rx_ptp_type_sync++;
else if (p->ptp_msgtype == RX_PTP_FOLLOW_UP)
x->rx_ptp_type_follow_up++;
else if (p->ptp_msgtype == RX_PTP_DELAY_REQ)
x->rx_ptp_type_delay_req++;
else if (p->ptp_msgtype == RX_PTP_DELAY_RESP)
x->rx_ptp_type_delay_resp++;
else if (p->ptp_msgtype == RX_PTP_PDELAY_REQ)
x->rx_ptp_type_pdelay_req++;
else if (p->ptp_msgtype == RX_PTP_PDELAY_RESP)
x->rx_ptp_type_pdelay_resp++;
else if (p->ptp_msgtype == RX_PTP_PDELAY_FOLLOW_UP)
x->rx_ptp_type_pdelay_follow_up++;
else if (p->ptp_msgtype == RX_PTP_ANNOUNCE)
x->rx_ptp_announce++;
else if (p->ptp_msgtype == RX_PTP_MGMT)
x->rx_ptp_mgmt++;
else if (p->ptp_msgtype == RX_PTP_SIGNAL)
x->rx_ptp_signal++;
else if (p->ptp_msgtype == RX_PTP_RESV_MSG)
x->rx_ptp_resv_msg_type++;
}
/* Get rx timestamp status */
static int sxgbe_get_rx_ctxt_tstamp_status(struct sxgbe_rx_ctxt_desc *p)
{
if ((p->tstamp_hi == 0xffffffff) && (p->tstamp_lo == 0xffffffff)) {
pr_err("Time stamp corrupted\n");
return 0;
}
return p->tstamp_available;
}
static u64 sxgbe_get_rx_timestamp(struct sxgbe_rx_ctxt_desc *p)
{
u64 ns;
ns = p->tstamp_lo;
ns |= ((u64)p->tstamp_hi) << 32;
return ns;
}
static const struct sxgbe_desc_ops desc_ops = {
.init_tx_desc = sxgbe_init_tx_desc,
.tx_desc_enable_tse = sxgbe_tx_desc_enable_tse,
.prepare_tx_desc = sxgbe_prepare_tx_desc,
.tx_vlanctl_desc = sxgbe_tx_vlanctl_desc,
.set_tx_owner = sxgbe_set_tx_owner,
.get_tx_owner = sxgbe_get_tx_owner,
.close_tx_desc = sxgbe_close_tx_desc,
.release_tx_desc = sxgbe_release_tx_desc,
.clear_tx_ic = sxgbe_clear_tx_ic,
.get_tx_ls = sxgbe_get_tx_ls,
.get_tx_len = sxgbe_get_tx_len,
.tx_enable_tstamp = sxgbe_tx_enable_tstamp,
.get_tx_timestamp_status = sxgbe_get_tx_timestamp_status,
.tx_ctxt_desc_set_ctxt = sxgbe_tx_ctxt_desc_set_ctxt,
.tx_ctxt_desc_set_owner = sxgbe_tx_ctxt_desc_set_owner,
.get_tx_ctxt_owner = sxgbe_tx_ctxt_desc_get_owner,
.tx_ctxt_desc_set_mss = sxgbe_tx_ctxt_desc_set_mss,
.tx_ctxt_desc_get_mss = sxgbe_tx_ctxt_desc_get_mss,
.tx_ctxt_desc_set_tcmssv = sxgbe_tx_ctxt_desc_set_tcmssv,
.tx_ctxt_desc_reset_ostc = sxgbe_tx_ctxt_desc_reset_ostc,
.tx_ctxt_desc_set_ivlantag = sxgbe_tx_ctxt_desc_set_ivlantag,
.tx_ctxt_desc_get_ivlantag = sxgbe_tx_ctxt_desc_get_ivlantag,
.tx_ctxt_desc_set_vlantag = sxgbe_tx_ctxt_desc_set_vlantag,
.tx_ctxt_desc_get_vlantag = sxgbe_tx_ctxt_desc_get_vlantag,
.tx_ctxt_set_tstamp = sxgbe_tx_ctxt_desc_set_tstamp,
.close_tx_ctxt_desc = sxgbe_tx_ctxt_desc_close,
.get_tx_ctxt_cde = sxgbe_tx_ctxt_desc_get_cde,
.init_rx_desc = sxgbe_init_rx_desc,
.get_rx_owner = sxgbe_get_rx_owner,
.set_rx_owner = sxgbe_set_rx_owner,
.set_rx_int_on_com = sxgbe_set_rx_int_on_com,
.get_rx_frame_len = sxgbe_get_rx_frame_len,
.get_rx_fd_status = sxgbe_get_rx_fd_status,
.get_rx_ld_status = sxgbe_get_rx_ld_status,
.rx_wbstatus = sxgbe_rx_wbstatus,
.get_rx_ctxt_owner = sxgbe_get_rx_ctxt_owner,
.set_rx_ctxt_owner = sxgbe_set_ctxt_rx_owner,
.rx_ctxt_wbstatus = sxgbe_rx_ctxt_wbstatus,
.get_rx_ctxt_tstamp_status = sxgbe_get_rx_ctxt_tstamp_status,
.get_timestamp = sxgbe_get_rx_timestamp,
};
const struct sxgbe_desc_ops *sxgbe_get_desc_ops(void)
{
return &desc_ops;
}
