android_kernel_samsung_sm8650/dwxgmac2_descs.c
2024-02-03 18:25:13 -08:00

518 lines
14 KiB
C

/*
* TC956X ethernet driver.
*
* dwxgmac2_descs.c
*
* Copyright (C) 2018 Synopsys, Inc. and/or its affiliates.
* Copyright (C) 2021 Toshiba Electronic Devices & Storage Corporation
*
* This file has been derived from the STMicro and Synopsys Linux driver,
* and developed or modified for TC956X.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that 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 Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
/*! History:
* 20 Jan 2021 : Initial Version
* VERSION : 00-01
*
* 15 Mar 2021 : Base lined
* VERSION : 01-00
* 15 Jul 2021 : 1. USXGMII/XFI/SGMII/RGMII interface supported without module parameter
* VERSION : 01-00-02
* 20 Jul 2021 : 1. Debug prints removed
* VERSION : 01-00-03
*/
#include "tc956xmac_inc.h"
#include "tc956xmac.h"
#include "common.h"
#include "dwxgmac2.h"
static int dwxgmac2_get_tx_status(struct tc956xmac_priv *priv, void *data,
struct tc956xmac_extra_stats *x,
struct dma_desc *p, void __iomem *ioaddr)
{
unsigned int tdes3 = le32_to_cpu(p->des3);
int ret = tx_done;
if (unlikely(tdes3 & XGMAC_TDES3_OWN))
return tx_dma_own;
if (likely(!(tdes3 & XGMAC_TDES3_LD)))
return tx_not_ls;
return ret;
}
static int dwxgmac2_get_rx_status(struct tc956xmac_priv *priv, void *data,
struct tc956xmac_extra_stats *x,
struct dma_desc *p)
{
unsigned int rdes3 = le32_to_cpu(p->des3);
if (unlikely(rdes3 & XGMAC_RDES3_OWN))
return dma_own;
if (unlikely(rdes3 & XGMAC_RDES3_CTXT))
return discard_frame;
if (likely(!(rdes3 & XGMAC_RDES3_LD)))
return rx_not_ls;
if (unlikely((rdes3 & XGMAC_RDES3_ES) && (rdes3 & XGMAC_RDES3_LD)))
return discard_frame;
return good_frame;
}
#ifdef TC956X_UNSUPPORTED_UNTESTED_FEATURE
static int dwxgmac2_get_tx_len(struct tc956xmac_priv *priv, struct dma_desc *p)
{
return (le32_to_cpu(p->des2) & XGMAC_TDES2_B1L);
}
static int dwxgmac2_get_tx_owner(struct tc956xmac_priv *priv, struct dma_desc *p)
{
return (le32_to_cpu(p->des3) & XGMAC_TDES3_OWN) > 0;
}
#endif /* TC956X_UNSUPPORTED_UNTESTED_FEATURE */
static void dwxgmac2_set_tx_owner(struct tc956xmac_priv *priv, struct dma_desc *p)
{
p->des3 |= cpu_to_le32(XGMAC_TDES3_OWN);
}
static void dwxgmac2_set_rx_owner(struct tc956xmac_priv *priv,
struct dma_desc *p, int disable_rx_ic)
{
p->des3 |= cpu_to_le32(XGMAC_RDES3_OWN);
if (!disable_rx_ic)
p->des3 |= cpu_to_le32(XGMAC_RDES3_IOC);
}
#ifdef TC956X_UNSUPPORTED_UNTESTED_FEATURE
static int dwxgmac2_get_tx_ls(struct tc956xmac_priv *priv, struct dma_desc *p)
{
return (le32_to_cpu(p->des3) & XGMAC_RDES3_LD) > 0;
}
#endif /* TC956X_UNSUPPORTED_UNTESTED_FEATURE */
static int dwxgmac2_get_rx_frame_len(struct tc956xmac_priv *priv,
struct dma_desc *p, int rx_coe)
{
return (le32_to_cpu(p->des3) & XGMAC_RDES3_PL);
}
#ifdef TC956X_UNSUPPORTED_UNTESTED_FEATURE
static void dwxgmac2_enable_tx_timestamp(struct tc956xmac_priv *priv,
struct dma_desc *p)
{
p->des2 |= cpu_to_le32(XGMAC_TDES2_TTSE);
}
static int dwxgmac2_get_tx_timestamp_status(struct tc956xmac_priv *priv,
struct dma_desc *p)
{
return 0; /* Not supported */
}
static inline void dwxgmac2_get_timestamp(struct tc956xmac_priv *priv,
void *desc, u32 ats, u64 *ts)
{
struct dma_desc *p = (struct dma_desc *)desc;
u64 ns = 0;
ns += le32_to_cpu(p->des1) * 1000000000ULL;
ns += le32_to_cpu(p->des0);
*ts = ns;
netdev_dbg(priv->dev, "%s: timestamp in ns = 0x%llx", __func__, ns);
}
static int dwxgmac2_rx_check_timestamp(struct tc956xmac_priv *priv, void *desc)
{
struct dma_desc *p = (struct dma_desc *)desc;
unsigned int rdes3 = le32_to_cpu(p->des3);
bool desc_valid, ts_valid;
dma_rmb();
desc_valid = !(rdes3 & XGMAC_RDES3_OWN) && (rdes3 & XGMAC_RDES3_CTXT);
ts_valid = !(rdes3 & XGMAC_RDES3_TSD) && (rdes3 & XGMAC_RDES3_TSA);
if (likely(desc_valid && ts_valid)) {
if ((le32_to_cpu(p->des0) == 0xffffffff) && (le32_to_cpu(p->des1) == 0xffffffff))
return -EINVAL;
netdev_dbg(priv->dev, "%s: Rx timestamp Low = 0x%x", __func__,
le32_to_cpu(p->des0));
netdev_dbg(priv->dev, "%s: Rx timestamp High = 0x%x", __func__,
le32_to_cpu(p->des1));
return 0;
}
return -EINVAL;
}
#endif /* TC956X_UNSUPPORTED_UNTESTED_FEATURE */
static int dwxgmac2_get_rx_timestamp_status(struct tc956xmac_priv *priv,
void *desc, void *next_desc,
u32 ats)
{
#ifdef TC956X_UNSUPPORTED_UNTESTED_FEATURE
struct dma_desc *p = (struct dma_desc *)desc;
unsigned int rdes3 = le32_to_cpu(p->des3);
#endif /* TC956X_UNSUPPORTED_UNTESTED_FEATURE */
int ret = -EBUSY;
#ifdef TC956X_UNSUPPORTED_UNTESTED_FEATURE
if (likely(rdes3 & XGMAC_RDES3_CDA))
ret = dwxgmac2_rx_check_timestamp(priv, next_desc);
#endif /* TC956X_UNSUPPORTED_UNTESTED_FEATURE */
return !ret;
}
static void dwxgmac2_init_rx_desc(struct tc956xmac_priv *priv,
struct dma_desc *p, int disable_rx_ic,
int mode, int end, int bfsize)
{
dwxgmac2_set_rx_owner(priv, p, disable_rx_ic);
}
static void dwxgmac2_init_tx_desc(struct tc956xmac_priv *priv,
struct dma_desc *p, int mode, int end)
{
p->des0 = 0;
p->des1 = 0;
p->des2 = 0;
p->des3 = 0;
}
/**
* dwxgmac2_prepare_tx_desc - Fill descriptors based on the provided input
* parameters.
*
* @p: pointer to dma_desc descriptor
* @is_fs: 1 - first descriptor, 0 - not first descriptor
* @len: buffer length
* @csum_flag: checksum flag 1 - Enable HW checksum computaion, 0 - disable
* @crc_pad: CRC padding configuration
* @mode: descriptor mode
* @tx_own: descriptor own bit setting
* @ls: 1 - last descriptor, 0 - not last descriptor
* @tot_pkt_len: total packet length
*/
static void dwxgmac2_prepare_tx_desc(struct tc956xmac_priv *priv,
struct dma_desc *p, int is_fs, int len,
bool csum_flag, u32 crc_pad, int mode,
bool tx_own, bool ls,
unsigned int tot_pkt_len)
{
unsigned int tdes3 = le32_to_cpu(p->des3);
p->des2 |= cpu_to_le32(len & XGMAC_TDES2_B1L);
tdes3 |= tot_pkt_len & XGMAC_TDES3_FL;
if (is_fs)
tdes3 |= XGMAC_TDES3_FD;
else
tdes3 &= ~XGMAC_TDES3_FD;
if (csum_flag)
tdes3 |= 0x3 << XGMAC_TDES3_CIC_SHIFT;
else
tdes3 &= ~XGMAC_TDES3_CIC;
if (crc_pad)
tdes3 |= crc_pad << XGMAC_TDES3_CPC_SHIFT;
else
tdes3 &= ~XGMAC_TDES3_CPC;
if (ls)
tdes3 |= XGMAC_TDES3_LD;
else
tdes3 &= ~XGMAC_TDES3_LD;
/* Finally set the OWN bit. Later the DMA will start! */
if (tx_own)
tdes3 |= XGMAC_TDES3_OWN;
if (is_fs && tx_own)
/* When the own bit, for the first frame, has to be set, all
* descriptors for the same frame has to be set before, to
* avoid race condition.
*/
dma_wmb();
p->des3 = cpu_to_le32(tdes3);
}
static void dwxgmac2_prepare_tso_tx_desc(struct tc956xmac_priv *priv,
struct dma_desc *p, int is_fs,
int len1, int len2, bool tx_own,
bool ls, unsigned int tcphdrlen,
unsigned int tcppayloadlen)
{
unsigned int tdes3 = le32_to_cpu(p->des3);
if (len1)
p->des2 |= cpu_to_le32(len1 & XGMAC_TDES2_B1L);
if (len2)
p->des2 |= cpu_to_le32((len2 << XGMAC_TDES2_B2L_SHIFT) &
XGMAC_TDES2_B2L);
if (is_fs) {
tdes3 |= XGMAC_TDES3_FD | XGMAC_TDES3_TSE;
tdes3 |= (tcphdrlen << XGMAC_TDES3_THL_SHIFT) &
XGMAC_TDES3_THL;
tdes3 |= tcppayloadlen & XGMAC_TDES3_TPL;
} else {
tdes3 &= ~XGMAC_TDES3_FD;
}
if (ls)
tdes3 |= XGMAC_TDES3_LD;
else
tdes3 &= ~XGMAC_TDES3_LD;
/* Finally set the OWN bit. Later the DMA will start! */
if (tx_own)
tdes3 |= XGMAC_TDES3_OWN;
if (is_fs && tx_own)
/* When the own bit, for the first frame, has to be set, all
* descriptors for the same frame has to be set before, to
* avoid race condition.
*/
dma_wmb();
p->des3 = cpu_to_le32(tdes3);
}
static void dwxgmac2_release_tx_desc(struct tc956xmac_priv *priv,
struct dma_desc *p, int mode)
{
p->des0 = 0;
p->des1 = 0;
p->des2 = 0;
p->des3 = 0;
}
static void dwxgmac2_set_tx_ic(struct tc956xmac_priv *priv, struct dma_desc *p)
{
p->des2 |= cpu_to_le32(XGMAC_TDES2_IOC);
}
static void dwxgmac2_set_mss(struct tc956xmac_priv *priv,
struct dma_desc *p, unsigned int mss)
{
p->des0 = 0;
p->des1 = 0;
p->des2 = cpu_to_le32(mss);
p->des3 = cpu_to_le32(XGMAC_TDES3_CTXT | XGMAC_TDES3_TCMSSV);
}
#ifdef TC956X_UNSUPPORTED_UNTESTED_FEATURE
static void dwxgmac2_get_addr(struct tc956xmac_priv *priv,
struct dma_desc *p, unsigned int *addr)
{
*addr = le32_to_cpu(p->des0);
}
#endif /* TC956X_UNSUPPORTED_UNTESTED_FEATURE */
static void dwxgmac2_set_addr(struct tc956xmac_priv *priv,
struct dma_desc *p, dma_addr_t addr)
{
//printk("%s, buff addr = 0x%llx\n",__func__, addr);
p->des0 = cpu_to_le32(lower_32_bits(addr));
#ifdef TC956X
/* Set the mask for physical address access */
p->des1 = cpu_to_le32(TC956X_HOST_PHYSICAL_ADRS_MASK |
(upper_32_bits(addr) & 0xF));
#else
p->des1 = cpu_to_le32(upper_32_bits(addr));
#endif
//printk(" pdes0 = 0x%x. pdes1 = 0x%x\n", p->des0, p->des1);
}
static void dwxgmac2_clear(struct tc956xmac_priv *priv, struct dma_desc *p)
{
p->des0 = 0;
p->des1 = 0;
p->des2 = 0;
p->des3 = 0;
}
static int dwxgmac2_get_rx_hash(struct tc956xmac_priv *priv,
struct dma_desc *p, u32 *hash,
enum pkt_hash_types *type)
{
unsigned int rdes3 = le32_to_cpu(p->des3);
u32 ptype;
if (rdes3 & XGMAC_RDES3_RSV) {
ptype = (rdes3 & XGMAC_RDES3_L34T) >> XGMAC_RDES3_L34T_SHIFT;
switch (ptype) {
case XGMAC_L34T_IP4TCP:
case XGMAC_L34T_IP4UDP:
case XGMAC_L34T_IP6TCP:
case XGMAC_L34T_IP6UDP:
*type = PKT_HASH_TYPE_L4;
break;
default:
*type = PKT_HASH_TYPE_L3;
break;
}
*hash = le32_to_cpu(p->des1);
return 0;
}
return -EINVAL;
}
static int dwxgmac2_get_rx_header_len(struct tc956xmac_priv *priv,
struct dma_desc *p, unsigned int *len)
{
if (le32_to_cpu(p->des3) & XGMAC_RDES3_L34T)
*len = le32_to_cpu(p->des2) & XGMAC_RDES2_HL;
return 0;
}
static void dwxgmac2_set_sec_addr(struct tc956xmac_priv *priv,
struct dma_desc *p, dma_addr_t addr)
{
p->des2 = cpu_to_le32(lower_32_bits(addr));
p->des3 = cpu_to_le32(upper_32_bits(addr));
}
static void dwxgmac2_set_sarc(struct tc956xmac_priv *priv,
struct dma_desc *p, u32 sarc_type)
{
sarc_type <<= XGMAC_TDES3_SAIC_SHIFT;
p->des3 |= cpu_to_le32(sarc_type & XGMAC_TDES3_SAIC);
}
static void dwxgmac2_set_vlan_tag(struct tc956xmac_priv *priv,
struct dma_desc *p, u16 tag, u16 inner_tag,
u32 inner_type)
{
p->des0 = 0;
p->des1 = 0;
p->des2 = 0;
p->des3 = 0;
/* Inner VLAN */
if (inner_type) {
u32 des = inner_tag << XGMAC_TDES2_IVT_SHIFT;
des &= XGMAC_TDES2_IVT;
p->des2 = cpu_to_le32(des);
des = inner_type << XGMAC_TDES3_IVTIR_SHIFT;
des &= XGMAC_TDES3_IVTIR;
p->des3 = cpu_to_le32(des | XGMAC_TDES3_IVLTV);
}
/* Outer VLAN */
p->des3 |= cpu_to_le32(tag & XGMAC_TDES3_VT);
p->des3 |= cpu_to_le32(XGMAC_TDES3_VLTV);
p->des3 |= cpu_to_le32(XGMAC_TDES3_CTXT);
}
static void dwxgmac2_set_vlan(struct tc956xmac_priv *priv, struct dma_desc *p,
u32 type)
{
type <<= XGMAC_TDES2_VTIR_SHIFT;
p->des2 |= cpu_to_le32(type & XGMAC_TDES2_VTIR);
}
#ifdef TC956X_UNSUPPORTED_UNTESTED_FEATURE
static void dwxgmac2_set_tbs(struct tc956xmac_priv *priv, struct dma_edesc *p,
u32 sec, u32 nsec, bool lt_valid)
{
p->des4 = 0;
if (lt_valid)
p->des4 = cpu_to_le32((sec & XGMAC_TDES0_LT) | XGMAC_TDES0_LTV);
p->des5 = cpu_to_le32(nsec & XGMAC_TDES1_LT);
p->des6 = 0;
p->des7 = 0;
}
static void dwxgmac2_set_ostc(struct tc956xmac_priv *priv,
struct dma_desc *p, u32 ttsh, u32 ttsl)
{
p->des2 = 0;
/* Set the timestamp for the DMA to use for doing one-step correction */
p->des0 = cpu_to_le32(ttsl);
p->des1 = cpu_to_le32(ttsh);
/* One-Step Timestamp Correction Enable */
p->des3 |= cpu_to_le32(XGMAC_TDES3_OSTC | XGMAC_TDES3_TCMSSV);
/* Set Context Type for Context descriptor */
p->des3 |= cpu_to_le32(XGMAC_TDES3_CTXT);
}
#endif /* TC956X_UNSUPPORTED_UNTESTED_FEATURE */
const struct tc956xmac_desc_ops dwxgmac210_desc_ops = {
.tx_status = dwxgmac2_get_tx_status,
.rx_status = dwxgmac2_get_rx_status,
#ifdef TC956X_UNSUPPORTED_UNTESTED_FEATURE
.get_tx_len = dwxgmac2_get_tx_len,
.get_tx_owner = dwxgmac2_get_tx_owner,
#endif /* TC956X_UNSUPPORTED_UNTESTED_FEATURE */
.set_tx_owner = dwxgmac2_set_tx_owner,
.set_rx_owner = dwxgmac2_set_rx_owner,
#ifdef TC956X_UNSUPPORTED_UNTESTED_FEATURE
.get_tx_ls = dwxgmac2_get_tx_ls,
#endif /* TC956X_UNSUPPORTED_UNTESTED_FEATURE */
.get_rx_frame_len = dwxgmac2_get_rx_frame_len,
#ifdef TC956X_UNSUPPORTED_UNTESTED_FEATURE
.enable_tx_timestamp = dwxgmac2_enable_tx_timestamp,
.get_tx_timestamp_status = dwxgmac2_get_tx_timestamp_status,
#endif /* TC956X_UNSUPPORTED_UNTESTED_FEATURE */
.get_rx_timestamp_status = dwxgmac2_get_rx_timestamp_status,
#ifdef TC956X_UNSUPPORTED_UNTESTED_FEATURE
.get_timestamp = dwxgmac2_get_timestamp,
#endif /* TC956X_UNSUPPORTED_UNTESTED_FEATURE */
.set_tx_ic = dwxgmac2_set_tx_ic,
.prepare_tx_desc = dwxgmac2_prepare_tx_desc,
.prepare_tso_tx_desc = dwxgmac2_prepare_tso_tx_desc,
.release_tx_desc = dwxgmac2_release_tx_desc,
.init_rx_desc = dwxgmac2_init_rx_desc,
.init_tx_desc = dwxgmac2_init_tx_desc,
.set_mss = dwxgmac2_set_mss,
#ifdef TC956X_UNSUPPORTED_UNTESTED_FEATURE
.get_addr = dwxgmac2_get_addr,
#endif /* TC956X_UNSUPPORTED_UNTESTED_FEATURE */
.set_addr = dwxgmac2_set_addr,
.clear = dwxgmac2_clear,
.get_rx_hash = dwxgmac2_get_rx_hash,
.get_rx_header_len = dwxgmac2_get_rx_header_len,
.set_sec_addr = dwxgmac2_set_sec_addr,
.set_sarc = dwxgmac2_set_sarc,
.set_vlan_tag = dwxgmac2_set_vlan_tag,
.set_vlan = dwxgmac2_set_vlan,
#ifdef TC956X_UNSUPPORTED_UNTESTED_FEATURE
.set_tbs = dwxgmac2_set_tbs,
.set_ostc = dwxgmac2_set_ostc,
#endif /* TC956X_UNSUPPORTED_UNTESTED_FEATURE */
};