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linux/drivers/net/ethernet/freescale/fman/fman_memac.c
Jakub Kicinski 766607570b ethernet: constify references to netdev->dev_addr in drivers 
This big patch sprinkles const on local variables and
function arguments which may refer to netdev->dev_addr.

Commit 406f42fa0d ("net-next: When a bond have a massive amount
of VLANs...") introduced a rbtree for faster Ethernet address look
up. To maintain netdev->dev_addr in this tree we need to make all
the writes to it got through appropriate helpers.

Some of the changes here are not strictly required - const
is sometimes cast off but pointer is not used for writing.
It seems like it's still better to add the const in case
the code changes later or relevant -W flags get enabled
for the build.

No functional changes.

Link: https://lore.kernel.org/r/20211014142432.449314-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-10-14 09:22:11 -07:00

1216 lines
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/*
* Copyright 2008-2015 Freescale Semiconductor Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Freescale Semiconductor nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
*
* ALTERNATIVELY, this software may be distributed under the terms of the
* GNU General Public License ("GPL") as published by the Free Software
* Foundation, either version 2 of that License or (at your option) any
* later version.
*
* THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include "fman_memac.h"
#include "fman.h"
#include <linux/slab.h>
#include <linux/io.h>
#include <linux/phy.h>
#include <linux/phy_fixed.h>
#include <linux/of_mdio.h>
/* PCS registers */
#define MDIO_SGMII_CR 0x00
#define MDIO_SGMII_DEV_ABIL_SGMII 0x04
#define MDIO_SGMII_LINK_TMR_L 0x12
#define MDIO_SGMII_LINK_TMR_H 0x13
#define MDIO_SGMII_IF_MODE 0x14
/* SGMII Control defines */
#define SGMII_CR_AN_EN 0x1000
#define SGMII_CR_RESTART_AN 0x0200
#define SGMII_CR_FD 0x0100
#define SGMII_CR_SPEED_SEL1_1G 0x0040
#define SGMII_CR_DEF_VAL (SGMII_CR_AN_EN | SGMII_CR_FD | \
SGMII_CR_SPEED_SEL1_1G)
/* SGMII Device Ability for SGMII defines */
#define MDIO_SGMII_DEV_ABIL_SGMII_MODE 0x4001
#define MDIO_SGMII_DEV_ABIL_BASEX_MODE 0x01A0
/* Link timer define */
#define LINK_TMR_L 0xa120
#define LINK_TMR_H 0x0007
#define LINK_TMR_L_BASEX 0xaf08
#define LINK_TMR_H_BASEX 0x002f
/* SGMII IF Mode defines */
#define IF_MODE_USE_SGMII_AN 0x0002
#define IF_MODE_SGMII_EN 0x0001
#define IF_MODE_SGMII_SPEED_100M 0x0004
#define IF_MODE_SGMII_SPEED_1G 0x0008
#define IF_MODE_SGMII_DUPLEX_HALF 0x0010
/* Num of additional exact match MAC adr regs */
#define MEMAC_NUM_OF_PADDRS 7
/* Control and Configuration Register (COMMAND_CONFIG) */
#define CMD_CFG_REG_LOWP_RXETY 0x01000000 /* 07 Rx low power indication */
#define CMD_CFG_TX_LOWP_ENA 0x00800000 /* 08 Tx Low Power Idle Enable */
#define CMD_CFG_PFC_MODE 0x00080000 /* 12 Enable PFC */
#define CMD_CFG_NO_LEN_CHK 0x00020000 /* 14 Payload length check disable */
#define CMD_CFG_SW_RESET 0x00001000 /* 19 S/W Reset, self clearing bit */
#define CMD_CFG_TX_PAD_EN 0x00000800 /* 20 Enable Tx padding of frames */
#define CMD_CFG_PAUSE_IGNORE 0x00000100 /* 23 Ignore Pause frame quanta */
#define CMD_CFG_CRC_FWD 0x00000040 /* 25 Terminate/frwd CRC of frames */
#define CMD_CFG_PAD_EN 0x00000020 /* 26 Frame padding removal */
#define CMD_CFG_PROMIS_EN 0x00000010 /* 27 Promiscuous operation enable */
#define CMD_CFG_RX_EN 0x00000002 /* 30 MAC receive path enable */
#define CMD_CFG_TX_EN 0x00000001 /* 31 MAC transmit path enable */
/* Transmit FIFO Sections Register (TX_FIFO_SECTIONS) */
#define TX_FIFO_SECTIONS_TX_EMPTY_MASK 0xFFFF0000
#define TX_FIFO_SECTIONS_TX_AVAIL_MASK 0x0000FFFF
#define TX_FIFO_SECTIONS_TX_EMPTY_DEFAULT_10G 0x00400000
#define TX_FIFO_SECTIONS_TX_EMPTY_DEFAULT_1G 0x00100000
#define TX_FIFO_SECTIONS_TX_AVAIL_10G 0x00000019
#define TX_FIFO_SECTIONS_TX_AVAIL_1G 0x00000020
#define TX_FIFO_SECTIONS_TX_AVAIL_SLOW_10G 0x00000060
#define GET_TX_EMPTY_DEFAULT_VALUE(_val) \
do { \
_val &= ~TX_FIFO_SECTIONS_TX_EMPTY_MASK; \
((_val == TX_FIFO_SECTIONS_TX_AVAIL_10G) ? \
(_val |= TX_FIFO_SECTIONS_TX_EMPTY_DEFAULT_10G) :\
(_val |= TX_FIFO_SECTIONS_TX_EMPTY_DEFAULT_1G));\
} while (0)
/* Interface Mode Register (IF_MODE) */
#define IF_MODE_MASK 0x00000003 /* 30-31 Mask on i/f mode bits */
#define IF_MODE_10G 0x00000000 /* 30-31 10G interface */
#define IF_MODE_MII 0x00000001 /* 30-31 MII interface */
#define IF_MODE_GMII 0x00000002 /* 30-31 GMII (1G) interface */
#define IF_MODE_RGMII 0x00000004
#define IF_MODE_RGMII_AUTO 0x00008000
#define IF_MODE_RGMII_1000 0x00004000 /* 10 - 1000Mbps RGMII */
#define IF_MODE_RGMII_100 0x00000000 /* 00 - 100Mbps RGMII */
#define IF_MODE_RGMII_10 0x00002000 /* 01 - 10Mbps RGMII */
#define IF_MODE_RGMII_SP_MASK 0x00006000 /* Setsp mask bits */
#define IF_MODE_RGMII_FD 0x00001000 /* Full duplex RGMII */
#define IF_MODE_HD 0x00000040 /* Half duplex operation */
/* Hash table Control Register (HASHTABLE_CTRL) */
#define HASH_CTRL_MCAST_EN 0x00000100
/* 26-31 Hash table address code */
#define HASH_CTRL_ADDR_MASK 0x0000003F
/* MAC mcast indication */
#define GROUP_ADDRESS 0x0000010000000000LL
#define HASH_TABLE_SIZE 64 /* Hash tbl size */
/* Interrupt Mask Register (IMASK) */
#define MEMAC_IMASK_MGI 0x40000000 /* 1 Magic pkt detect indication */
#define MEMAC_IMASK_TSECC_ER 0x20000000 /* 2 Timestamp FIFO ECC error evnt */
#define MEMAC_IMASK_TECC_ER 0x02000000 /* 6 Transmit frame ECC error evnt */
#define MEMAC_IMASK_RECC_ER 0x01000000 /* 7 Receive frame ECC error evnt */
#define MEMAC_ALL_ERRS_IMASK \
((u32)(MEMAC_IMASK_TSECC_ER | \
MEMAC_IMASK_TECC_ER | \
MEMAC_IMASK_RECC_ER | \
MEMAC_IMASK_MGI))
#define MEMAC_IEVNT_PCS 0x80000000 /* PCS (XG). Link sync (G) */
#define MEMAC_IEVNT_AN 0x40000000 /* Auto-negotiation */
#define MEMAC_IEVNT_LT 0x20000000 /* Link Training/New page */
#define MEMAC_IEVNT_MGI 0x00004000 /* Magic pkt detection */
#define MEMAC_IEVNT_TS_ECC_ER 0x00002000 /* Timestamp FIFO ECC error*/
#define MEMAC_IEVNT_RX_FIFO_OVFL 0x00001000 /* Rx FIFO overflow */
#define MEMAC_IEVNT_TX_FIFO_UNFL 0x00000800 /* Tx FIFO underflow */
#define MEMAC_IEVNT_TX_FIFO_OVFL 0x00000400 /* Tx FIFO overflow */
#define MEMAC_IEVNT_TX_ECC_ER 0x00000200 /* Tx frame ECC error */
#define MEMAC_IEVNT_RX_ECC_ER 0x00000100 /* Rx frame ECC error */
#define MEMAC_IEVNT_LI_FAULT 0x00000080 /* Link Interruption flt */
#define MEMAC_IEVNT_RX_EMPTY 0x00000040 /* Rx FIFO empty */
#define MEMAC_IEVNT_TX_EMPTY 0x00000020 /* Tx FIFO empty */
#define MEMAC_IEVNT_RX_LOWP 0x00000010 /* Low Power Idle */
#define MEMAC_IEVNT_PHY_LOS 0x00000004 /* Phy loss of signal */
#define MEMAC_IEVNT_REM_FAULT 0x00000002 /* Remote fault (XGMII) */
#define MEMAC_IEVNT_LOC_FAULT 0x00000001 /* Local fault (XGMII) */
#define DEFAULT_PAUSE_QUANTA 0xf000
#define DEFAULT_FRAME_LENGTH 0x600
#define DEFAULT_TX_IPG_LENGTH 12
#define CLXY_PAUSE_QUANTA_CLX_PQNT 0x0000FFFF
#define CLXY_PAUSE_QUANTA_CLY_PQNT 0xFFFF0000
#define CLXY_PAUSE_THRESH_CLX_QTH 0x0000FFFF
#define CLXY_PAUSE_THRESH_CLY_QTH 0xFFFF0000
struct mac_addr {
/* Lower 32 bits of 48-bit MAC address */
u32 mac_addr_l;
/* Upper 16 bits of 48-bit MAC address */
u32 mac_addr_u;
};
/* memory map */
struct memac_regs {
u32 res0000[2]; /* General Control and Status */
u32 command_config; /* 0x008 Ctrl and cfg */
struct mac_addr mac_addr0; /* 0x00C-0x010 MAC_ADDR_0...1 */
u32 maxfrm; /* 0x014 Max frame length */
u32 res0018[1];
u32 rx_fifo_sections; /* Receive FIFO configuration reg */
u32 tx_fifo_sections; /* Transmit FIFO configuration reg */
u32 res0024[2];
u32 hashtable_ctrl; /* 0x02C Hash table control */
u32 res0030[4];
u32 ievent; /* 0x040 Interrupt event */
u32 tx_ipg_length; /* 0x044 Transmitter inter-packet-gap */
u32 res0048;
u32 imask; /* 0x04C Interrupt mask */
u32 res0050;
u32 pause_quanta[4]; /* 0x054 Pause quanta */
u32 pause_thresh[4]; /* 0x064 Pause quanta threshold */
u32 rx_pause_status; /* 0x074 Receive pause status */
u32 res0078[2];
struct mac_addr mac_addr[MEMAC_NUM_OF_PADDRS];/* 0x80-0x0B4 mac padr */
u32 lpwake_timer; /* 0x0B8 Low Power Wakeup Timer */
u32 sleep_timer; /* 0x0BC Transmit EEE Low Power Timer */
u32 res00c0[8];
u32 statn_config; /* 0x0E0 Statistics configuration */
u32 res00e4[7];
/* Rx Statistics Counter */
u32 reoct_l;
u32 reoct_u;
u32 roct_l;
u32 roct_u;
u32 raln_l;
u32 raln_u;
u32 rxpf_l;
u32 rxpf_u;
u32 rfrm_l;
u32 rfrm_u;
u32 rfcs_l;
u32 rfcs_u;
u32 rvlan_l;
u32 rvlan_u;
u32 rerr_l;
u32 rerr_u;
u32 ruca_l;
u32 ruca_u;
u32 rmca_l;
u32 rmca_u;
u32 rbca_l;
u32 rbca_u;
u32 rdrp_l;
u32 rdrp_u;
u32 rpkt_l;
u32 rpkt_u;
u32 rund_l;
u32 rund_u;
u32 r64_l;
u32 r64_u;
u32 r127_l;
u32 r127_u;
u32 r255_l;
u32 r255_u;
u32 r511_l;
u32 r511_u;
u32 r1023_l;
u32 r1023_u;
u32 r1518_l;
u32 r1518_u;
u32 r1519x_l;
u32 r1519x_u;
u32 rovr_l;
u32 rovr_u;
u32 rjbr_l;
u32 rjbr_u;
u32 rfrg_l;
u32 rfrg_u;
u32 rcnp_l;
u32 rcnp_u;
u32 rdrntp_l;
u32 rdrntp_u;
u32 res01d0[12];
/* Tx Statistics Counter */
u32 teoct_l;
u32 teoct_u;
u32 toct_l;
u32 toct_u;
u32 res0210[2];
u32 txpf_l;
u32 txpf_u;
u32 tfrm_l;
u32 tfrm_u;
u32 tfcs_l;
u32 tfcs_u;
u32 tvlan_l;
u32 tvlan_u;
u32 terr_l;
u32 terr_u;
u32 tuca_l;
u32 tuca_u;
u32 tmca_l;
u32 tmca_u;
u32 tbca_l;
u32 tbca_u;
u32 res0258[2];
u32 tpkt_l;
u32 tpkt_u;
u32 tund_l;
u32 tund_u;
u32 t64_l;
u32 t64_u;
u32 t127_l;
u32 t127_u;
u32 t255_l;
u32 t255_u;
u32 t511_l;
u32 t511_u;
u32 t1023_l;
u32 t1023_u;
u32 t1518_l;
u32 t1518_u;
u32 t1519x_l;
u32 t1519x_u;
u32 res02a8[6];
u32 tcnp_l;
u32 tcnp_u;
u32 res02c8[14];
/* Line Interface Control */
u32 if_mode; /* 0x300 Interface Mode Control */
u32 if_status; /* 0x304 Interface Status */
u32 res0308[14];
/* HiGig/2 */
u32 hg_config; /* 0x340 Control and cfg */
u32 res0344[3];
u32 hg_pause_quanta; /* 0x350 Pause quanta */
u32 res0354[3];
u32 hg_pause_thresh; /* 0x360 Pause quanta threshold */
u32 res0364[3];
u32 hgrx_pause_status; /* 0x370 Receive pause status */
u32 hg_fifos_status; /* 0x374 fifos status */
u32 rhm; /* 0x378 rx messages counter */
u32 thm; /* 0x37C tx messages counter */
};
struct memac_cfg {
bool reset_on_init;
bool pause_ignore;
bool promiscuous_mode_enable;
struct fixed_phy_status *fixed_link;
u16 max_frame_length;
u16 pause_quanta;
u32 tx_ipg_length;
};
struct fman_mac {
/* Pointer to MAC memory mapped registers */
struct memac_regs __iomem *regs;
/* MAC address of device */
u64 addr;
/* Ethernet physical interface */
phy_interface_t phy_if;
u16 max_speed;
void *dev_id; /* device cookie used by the exception cbs */
fman_mac_exception_cb *exception_cb;
fman_mac_exception_cb *event_cb;
/* Pointer to driver's global address hash table */
struct eth_hash_t *multicast_addr_hash;
/* Pointer to driver's individual address hash table */
struct eth_hash_t *unicast_addr_hash;
u8 mac_id;
u32 exceptions;
struct memac_cfg *memac_drv_param;
void *fm;
struct fman_rev_info fm_rev_info;
bool basex_if;
struct phy_device *pcsphy;
bool allmulti_enabled;
};
static void add_addr_in_paddr(struct memac_regs __iomem *regs, const u8 *adr,
u8 paddr_num)
{
u32 tmp0, tmp1;
tmp0 = (u32)(adr[0] | adr[1] << 8 | adr[2] << 16 | adr[3] << 24);
tmp1 = (u32)(adr[4] | adr[5] << 8);
if (paddr_num == 0) {
iowrite32be(tmp0, &regs->mac_addr0.mac_addr_l);
iowrite32be(tmp1, &regs->mac_addr0.mac_addr_u);
} else {
iowrite32be(tmp0, &regs->mac_addr[paddr_num - 1].mac_addr_l);
iowrite32be(tmp1, &regs->mac_addr[paddr_num - 1].mac_addr_u);
}
}
static int reset(struct memac_regs __iomem *regs)
{
u32 tmp;
int count;
tmp = ioread32be(&regs->command_config);
tmp |= CMD_CFG_SW_RESET;
iowrite32be(tmp, &regs->command_config);
count = 100;
do {
udelay(1);
} while ((ioread32be(&regs->command_config) & CMD_CFG_SW_RESET) &&
--count);
if (count == 0)
return -EBUSY;
return 0;
}
static void set_exception(struct memac_regs __iomem *regs, u32 val,
bool enable)
{
u32 tmp;
tmp = ioread32be(&regs->imask);
if (enable)
tmp |= val;
else
tmp &= ~val;
iowrite32be(tmp, &regs->imask);
}
static int init(struct memac_regs __iomem *regs, struct memac_cfg *cfg,
phy_interface_t phy_if, u16 speed, bool slow_10g_if,
u32 exceptions)
{
u32 tmp;
/* Config */
tmp = 0;
if (cfg->promiscuous_mode_enable)
tmp |= CMD_CFG_PROMIS_EN;
if (cfg->pause_ignore)
tmp |= CMD_CFG_PAUSE_IGNORE;
/* Payload length check disable */
tmp |= CMD_CFG_NO_LEN_CHK;
/* Enable padding of frames in transmit direction */
tmp |= CMD_CFG_TX_PAD_EN;
tmp |= CMD_CFG_CRC_FWD;
iowrite32be(tmp, &regs->command_config);
/* Max Frame Length */
iowrite32be((u32)cfg->max_frame_length, &regs->maxfrm);
/* Pause Time */
iowrite32be((u32)cfg->pause_quanta, &regs->pause_quanta[0]);
iowrite32be((u32)0, &regs->pause_thresh[0]);
/* IF_MODE */
tmp = 0;
switch (phy_if) {
case PHY_INTERFACE_MODE_XGMII:
tmp |= IF_MODE_10G;
break;
case PHY_INTERFACE_MODE_MII:
tmp |= IF_MODE_MII;
break;
default:
tmp |= IF_MODE_GMII;
if (phy_if == PHY_INTERFACE_MODE_RGMII ||
phy_if == PHY_INTERFACE_MODE_RGMII_ID ||
phy_if == PHY_INTERFACE_MODE_RGMII_RXID ||
phy_if == PHY_INTERFACE_MODE_RGMII_TXID)
tmp |= IF_MODE_RGMII | IF_MODE_RGMII_AUTO;
}
iowrite32be(tmp, &regs->if_mode);
/* TX_FIFO_SECTIONS */
tmp = 0;
if (phy_if == PHY_INTERFACE_MODE_XGMII) {
if (slow_10g_if) {
tmp |= (TX_FIFO_SECTIONS_TX_AVAIL_SLOW_10G |
TX_FIFO_SECTIONS_TX_EMPTY_DEFAULT_10G);
} else {
tmp |= (TX_FIFO_SECTIONS_TX_AVAIL_10G |
TX_FIFO_SECTIONS_TX_EMPTY_DEFAULT_10G);
}
} else {
tmp |= (TX_FIFO_SECTIONS_TX_AVAIL_1G |
TX_FIFO_SECTIONS_TX_EMPTY_DEFAULT_1G);
}
iowrite32be(tmp, &regs->tx_fifo_sections);
/* clear all pending events and set-up interrupts */
iowrite32be(0xffffffff, &regs->ievent);
set_exception(regs, exceptions, true);
return 0;
}
static void set_dflts(struct memac_cfg *cfg)
{
cfg->reset_on_init = false;
cfg->promiscuous_mode_enable = false;
cfg->pause_ignore = false;
cfg->tx_ipg_length = DEFAULT_TX_IPG_LENGTH;
cfg->max_frame_length = DEFAULT_FRAME_LENGTH;
cfg->pause_quanta = DEFAULT_PAUSE_QUANTA;
}
static u32 get_mac_addr_hash_code(u64 eth_addr)
{
u64 mask1, mask2;
u32 xor_val = 0;
u8 i, j;
for (i = 0; i < 6; i++) {
mask1 = eth_addr & (u64)0x01;
eth_addr >>= 1;
for (j = 0; j < 7; j++) {
mask2 = eth_addr & (u64)0x01;
mask1 ^= mask2;
eth_addr >>= 1;
}
xor_val |= (mask1 << (5 - i));
}
return xor_val;
}
static void setup_sgmii_internal_phy(struct fman_mac *memac,
struct fixed_phy_status *fixed_link)
{
u16 tmp_reg16;
if (WARN_ON(!memac->pcsphy))
return;
/* SGMII mode */
tmp_reg16 = IF_MODE_SGMII_EN;
if (!fixed_link)
/* AN enable */
tmp_reg16 |= IF_MODE_USE_SGMII_AN;
else {
switch (fixed_link->speed) {
case 10:
/* For 10M: IF_MODE[SPEED_10M] = 0 */
break;
case 100:
tmp_reg16 |= IF_MODE_SGMII_SPEED_100M;
break;
case 1000:
default:
tmp_reg16 |= IF_MODE_SGMII_SPEED_1G;
break;
}
if (!fixed_link->duplex)
tmp_reg16 |= IF_MODE_SGMII_DUPLEX_HALF;
}
phy_write(memac->pcsphy, MDIO_SGMII_IF_MODE, tmp_reg16);
/* Device ability according to SGMII specification */
tmp_reg16 = MDIO_SGMII_DEV_ABIL_SGMII_MODE;
phy_write(memac->pcsphy, MDIO_SGMII_DEV_ABIL_SGMII, tmp_reg16);
/* Adjust link timer for SGMII -
* According to Cisco SGMII specification the timer should be 1.6 ms.
* The link_timer register is configured in units of the clock.
* - When running as 1G SGMII, Serdes clock is 125 MHz, so
* unit = 1 / (125*10^6 Hz) = 8 ns.
* 1.6 ms in units of 8 ns = 1.6ms / 8ns = 2*10^5 = 0x30d40
* - When running as 2.5G SGMII, Serdes clock is 312.5 MHz, so
* unit = 1 / (312.5*10^6 Hz) = 3.2 ns.
* 1.6 ms in units of 3.2 ns = 1.6ms / 3.2ns = 5*10^5 = 0x7a120.
* Since link_timer value of 1G SGMII will be too short for 2.5 SGMII,
* we always set up here a value of 2.5 SGMII.
*/
phy_write(memac->pcsphy, MDIO_SGMII_LINK_TMR_H, LINK_TMR_H);
phy_write(memac->pcsphy, MDIO_SGMII_LINK_TMR_L, LINK_TMR_L);
if (!fixed_link)
/* Restart AN */
tmp_reg16 = SGMII_CR_DEF_VAL | SGMII_CR_RESTART_AN;
else
/* AN disabled */
tmp_reg16 = SGMII_CR_DEF_VAL & ~SGMII_CR_AN_EN;
phy_write(memac->pcsphy, 0x0, tmp_reg16);
}
static void setup_sgmii_internal_phy_base_x(struct fman_mac *memac)
{
u16 tmp_reg16;
/* AN Device capability */
tmp_reg16 = MDIO_SGMII_DEV_ABIL_BASEX_MODE;
phy_write(memac->pcsphy, MDIO_SGMII_DEV_ABIL_SGMII, tmp_reg16);
/* Adjust link timer for SGMII -
* For Serdes 1000BaseX auto-negotiation the timer should be 10 ms.
* The link_timer register is configured in units of the clock.
* - When running as 1G SGMII, Serdes clock is 125 MHz, so
* unit = 1 / (125*10^6 Hz) = 8 ns.
* 10 ms in units of 8 ns = 10ms / 8ns = 1250000 = 0x1312d0
* - When running as 2.5G SGMII, Serdes clock is 312.5 MHz, so
* unit = 1 / (312.5*10^6 Hz) = 3.2 ns.
* 10 ms in units of 3.2 ns = 10ms / 3.2ns = 3125000 = 0x2faf08.
* Since link_timer value of 1G SGMII will be too short for 2.5 SGMII,
* we always set up here a value of 2.5 SGMII.
*/
phy_write(memac->pcsphy, MDIO_SGMII_LINK_TMR_H, LINK_TMR_H_BASEX);
phy_write(memac->pcsphy, MDIO_SGMII_LINK_TMR_L, LINK_TMR_L_BASEX);
/* Restart AN */
tmp_reg16 = SGMII_CR_DEF_VAL | SGMII_CR_RESTART_AN;
phy_write(memac->pcsphy, 0x0, tmp_reg16);
}
static int check_init_parameters(struct fman_mac *memac)
{
if (!memac->exception_cb) {
pr_err("Uninitialized exception handler\n");
return -EINVAL;
}
if (!memac->event_cb) {
pr_warn("Uninitialize event handler\n");
return -EINVAL;
}
return 0;
}
static int get_exception_flag(enum fman_mac_exceptions exception)
{
u32 bit_mask;
switch (exception) {
case FM_MAC_EX_10G_TX_ECC_ER:
bit_mask = MEMAC_IMASK_TECC_ER;
break;
case FM_MAC_EX_10G_RX_ECC_ER:
bit_mask = MEMAC_IMASK_RECC_ER;
break;
case FM_MAC_EX_TS_FIFO_ECC_ERR:
bit_mask = MEMAC_IMASK_TSECC_ER;
break;
case FM_MAC_EX_MAGIC_PACKET_INDICATION:
bit_mask = MEMAC_IMASK_MGI;
break;
default:
bit_mask = 0;
break;
}
return bit_mask;
}
static void memac_err_exception(void *handle)
{
struct fman_mac *memac = (struct fman_mac *)handle;
struct memac_regs __iomem *regs = memac->regs;
u32 event, imask;
event = ioread32be(&regs->ievent);
imask = ioread32be(&regs->imask);
/* Imask include both error and notification/event bits.
* Leaving only error bits enabled by imask.
* The imask error bits are shifted by 16 bits offset from
* their corresponding location in the ievent - hence the >> 16
*/
event &= ((imask & MEMAC_ALL_ERRS_IMASK) >> 16);
iowrite32be(event, &regs->ievent);
if (event & MEMAC_IEVNT_TS_ECC_ER)
memac->exception_cb(memac->dev_id, FM_MAC_EX_TS_FIFO_ECC_ERR);
if (event & MEMAC_IEVNT_TX_ECC_ER)
memac->exception_cb(memac->dev_id, FM_MAC_EX_10G_TX_ECC_ER);
if (event & MEMAC_IEVNT_RX_ECC_ER)
memac->exception_cb(memac->dev_id, FM_MAC_EX_10G_RX_ECC_ER);
}
static void memac_exception(void *handle)
{
struct fman_mac *memac = (struct fman_mac *)handle;
struct memac_regs __iomem *regs = memac->regs;
u32 event, imask;
event = ioread32be(&regs->ievent);
imask = ioread32be(&regs->imask);
/* Imask include both error and notification/event bits.
* Leaving only error bits enabled by imask.
* The imask error bits are shifted by 16 bits offset from
* their corresponding location in the ievent - hence the >> 16
*/
event &= ((imask & MEMAC_ALL_ERRS_IMASK) >> 16);
iowrite32be(event, &regs->ievent);
if (event & MEMAC_IEVNT_MGI)
memac->exception_cb(memac->dev_id,
FM_MAC_EX_MAGIC_PACKET_INDICATION);
}
static void free_init_resources(struct fman_mac *memac)
{
fman_unregister_intr(memac->fm, FMAN_MOD_MAC, memac->mac_id,
FMAN_INTR_TYPE_ERR);
fman_unregister_intr(memac->fm, FMAN_MOD_MAC, memac->mac_id,
FMAN_INTR_TYPE_NORMAL);
/* release the driver's group hash table */
free_hash_table(memac->multicast_addr_hash);
memac->multicast_addr_hash = NULL;
/* release the driver's individual hash table */
free_hash_table(memac->unicast_addr_hash);
memac->unicast_addr_hash = NULL;
}
static bool is_init_done(struct memac_cfg *memac_drv_params)
{
/* Checks if mEMAC driver parameters were initialized */
if (!memac_drv_params)
return true;
return false;
}
int memac_enable(struct fman_mac *memac, enum comm_mode mode)
{
struct memac_regs __iomem *regs = memac->regs;
u32 tmp;
if (!is_init_done(memac->memac_drv_param))
return -EINVAL;
tmp = ioread32be(&regs->command_config);
if (mode & COMM_MODE_RX)
tmp |= CMD_CFG_RX_EN;
if (mode & COMM_MODE_TX)
tmp |= CMD_CFG_TX_EN;
iowrite32be(tmp, &regs->command_config);
return 0;
}
int memac_disable(struct fman_mac *memac, enum comm_mode mode)
{
struct memac_regs __iomem *regs = memac->regs;
u32 tmp;
if (!is_init_done(memac->memac_drv_param))
return -EINVAL;
tmp = ioread32be(&regs->command_config);
if (mode & COMM_MODE_RX)
tmp &= ~CMD_CFG_RX_EN;
if (mode & COMM_MODE_TX)
tmp &= ~CMD_CFG_TX_EN;
iowrite32be(tmp, &regs->command_config);
return 0;
}
int memac_set_promiscuous(struct fman_mac *memac, bool new_val)
{
struct memac_regs __iomem *regs = memac->regs;
u32 tmp;
if (!is_init_done(memac->memac_drv_param))
return -EINVAL;
tmp = ioread32be(&regs->command_config);
if (new_val)
tmp |= CMD_CFG_PROMIS_EN;
else
tmp &= ~CMD_CFG_PROMIS_EN;
iowrite32be(tmp, &regs->command_config);
return 0;
}
int memac_adjust_link(struct fman_mac *memac, u16 speed)
{
struct memac_regs __iomem *regs = memac->regs;
u32 tmp;
if (!is_init_done(memac->memac_drv_param))
return -EINVAL;
tmp = ioread32be(&regs->if_mode);
/* Set full duplex */
tmp &= ~IF_MODE_HD;
if (phy_interface_mode_is_rgmii(memac->phy_if)) {
/* Configure RGMII in manual mode */
tmp &= ~IF_MODE_RGMII_AUTO;
tmp &= ~IF_MODE_RGMII_SP_MASK;
/* Full duplex */
tmp |= IF_MODE_RGMII_FD;
switch (speed) {
case SPEED_1000:
tmp |= IF_MODE_RGMII_1000;
break;
case SPEED_100:
tmp |= IF_MODE_RGMII_100;
break;
case SPEED_10:
tmp |= IF_MODE_RGMII_10;
break;
default:
break;
}
}
iowrite32be(tmp, &regs->if_mode);
return 0;
}
int memac_cfg_max_frame_len(struct fman_mac *memac, u16 new_val)
{
if (is_init_done(memac->memac_drv_param))
return -EINVAL;
memac->memac_drv_param->max_frame_length = new_val;
return 0;
}
int memac_cfg_reset_on_init(struct fman_mac *memac, bool enable)
{
if (is_init_done(memac->memac_drv_param))
return -EINVAL;
memac->memac_drv_param->reset_on_init = enable;
return 0;
}
int memac_cfg_fixed_link(struct fman_mac *memac,
struct fixed_phy_status *fixed_link)
{
if (is_init_done(memac->memac_drv_param))
return -EINVAL;
memac->memac_drv_param->fixed_link = fixed_link;
return 0;
}
int memac_set_tx_pause_frames(struct fman_mac *memac, u8 priority,
u16 pause_time, u16 thresh_time)
{
struct memac_regs __iomem *regs = memac->regs;
u32 tmp;
if (!is_init_done(memac->memac_drv_param))
return -EINVAL;
tmp = ioread32be(&regs->tx_fifo_sections);
GET_TX_EMPTY_DEFAULT_VALUE(tmp);
iowrite32be(tmp, &regs->tx_fifo_sections);
tmp = ioread32be(&regs->command_config);
tmp &= ~CMD_CFG_PFC_MODE;
iowrite32be(tmp, &regs->command_config);
tmp = ioread32be(&regs->pause_quanta[priority / 2]);
if (priority % 2)
tmp &= CLXY_PAUSE_QUANTA_CLX_PQNT;
else
tmp &= CLXY_PAUSE_QUANTA_CLY_PQNT;
tmp |= ((u32)pause_time << (16 * (priority % 2)));
iowrite32be(tmp, &regs->pause_quanta[priority / 2]);
tmp = ioread32be(&regs->pause_thresh[priority / 2]);
if (priority % 2)
tmp &= CLXY_PAUSE_THRESH_CLX_QTH;
else
tmp &= CLXY_PAUSE_THRESH_CLY_QTH;
tmp |= ((u32)thresh_time << (16 * (priority % 2)));
iowrite32be(tmp, &regs->pause_thresh[priority / 2]);
return 0;
}
int memac_accept_rx_pause_frames(struct fman_mac *memac, bool en)
{
struct memac_regs __iomem *regs = memac->regs;
u32 tmp;
if (!is_init_done(memac->memac_drv_param))
return -EINVAL;
tmp = ioread32be(&regs->command_config);
if (en)
tmp &= ~CMD_CFG_PAUSE_IGNORE;
else
tmp |= CMD_CFG_PAUSE_IGNORE;
iowrite32be(tmp, &regs->command_config);
return 0;
}
int memac_modify_mac_address(struct fman_mac *memac, const enet_addr_t *enet_addr)
{
if (!is_init_done(memac->memac_drv_param))
return -EINVAL;
add_addr_in_paddr(memac->regs, (const u8 *)(*enet_addr), 0);
return 0;
}
int memac_add_hash_mac_address(struct fman_mac *memac, enet_addr_t *eth_addr)
{
struct memac_regs __iomem *regs = memac->regs;
struct eth_hash_entry *hash_entry;
u32 hash;
u64 addr;
if (!is_init_done(memac->memac_drv_param))
return -EINVAL;
addr = ENET_ADDR_TO_UINT64(*eth_addr);
if (!(addr & GROUP_ADDRESS)) {
/* Unicast addresses not supported in hash */
pr_err("Unicast Address\n");
return -EINVAL;
}
hash = get_mac_addr_hash_code(addr) & HASH_CTRL_ADDR_MASK;
/* Create element to be added to the driver hash table */
hash_entry = kmalloc(sizeof(*hash_entry), GFP_ATOMIC);
if (!hash_entry)
return -ENOMEM;
hash_entry->addr = addr;
INIT_LIST_HEAD(&hash_entry->node);
list_add_tail(&hash_entry->node,
&memac->multicast_addr_hash->lsts[hash]);
iowrite32be(hash | HASH_CTRL_MCAST_EN, &regs->hashtable_ctrl);
return 0;
}
int memac_set_allmulti(struct fman_mac *memac, bool enable)
{
u32 entry;
struct memac_regs __iomem *regs = memac->regs;
if (!is_init_done(memac->memac_drv_param))
return -EINVAL;
if (enable) {
for (entry = 0; entry < HASH_TABLE_SIZE; entry++)
iowrite32be(entry | HASH_CTRL_MCAST_EN,
&regs->hashtable_ctrl);
} else {
for (entry = 0; entry < HASH_TABLE_SIZE; entry++)
iowrite32be(entry & ~HASH_CTRL_MCAST_EN,
&regs->hashtable_ctrl);
}
memac->allmulti_enabled = enable;
return 0;
}
int memac_set_tstamp(struct fman_mac *memac, bool enable)
{
return 0; /* Always enabled. */
}
int memac_del_hash_mac_address(struct fman_mac *memac, enet_addr_t *eth_addr)
{
struct memac_regs __iomem *regs = memac->regs;
struct eth_hash_entry *hash_entry = NULL;
struct list_head *pos;
u32 hash;
u64 addr;
if (!is_init_done(memac->memac_drv_param))
return -EINVAL;
addr = ENET_ADDR_TO_UINT64(*eth_addr);
hash = get_mac_addr_hash_code(addr) & HASH_CTRL_ADDR_MASK;
list_for_each(pos, &memac->multicast_addr_hash->lsts[hash]) {
hash_entry = ETH_HASH_ENTRY_OBJ(pos);
if (hash_entry && hash_entry->addr == addr) {
list_del_init(&hash_entry->node);
kfree(hash_entry);
break;
}
}
if (!memac->allmulti_enabled) {
if (list_empty(&memac->multicast_addr_hash->lsts[hash]))
iowrite32be(hash & ~HASH_CTRL_MCAST_EN,
&regs->hashtable_ctrl);
}
return 0;
}
int memac_set_exception(struct fman_mac *memac,
enum fman_mac_exceptions exception, bool enable)
{
u32 bit_mask = 0;
if (!is_init_done(memac->memac_drv_param))
return -EINVAL;
bit_mask = get_exception_flag(exception);
if (bit_mask) {
if (enable)
memac->exceptions |= bit_mask;
else
memac->exceptions &= ~bit_mask;
} else {
pr_err("Undefined exception\n");
return -EINVAL;
}
set_exception(memac->regs, bit_mask, enable);
return 0;
}
int memac_init(struct fman_mac *memac)
{
struct memac_cfg *memac_drv_param;
u8 i;
enet_addr_t eth_addr;
bool slow_10g_if = false;
struct fixed_phy_status *fixed_link;
int err;
u32 reg32 = 0;
if (is_init_done(memac->memac_drv_param))
return -EINVAL;
err = check_init_parameters(memac);
if (err)
return err;
memac_drv_param = memac->memac_drv_param;
if (memac->fm_rev_info.major == 6 && memac->fm_rev_info.minor == 4)
slow_10g_if = true;
/* First, reset the MAC if desired. */
if (memac_drv_param->reset_on_init) {
err = reset(memac->regs);
if (err) {
pr_err("mEMAC reset failed\n");
return err;
}
}
/* MAC Address */
if (memac->addr != 0) {
MAKE_ENET_ADDR_FROM_UINT64(memac->addr, eth_addr);
add_addr_in_paddr(memac->regs, (const u8 *)eth_addr, 0);
}
fixed_link = memac_drv_param->fixed_link;
init(memac->regs, memac->memac_drv_param, memac->phy_if,
memac->max_speed, slow_10g_if, memac->exceptions);
/* FM_RX_FIFO_CORRUPT_ERRATA_10GMAC_A006320 errata workaround
* Exists only in FMan 6.0 and 6.3.
*/
if ((memac->fm_rev_info.major == 6) &&
((memac->fm_rev_info.minor == 0) ||
(memac->fm_rev_info.minor == 3))) {
/* MAC strips CRC from received frames - this workaround
* should decrease the likelihood of bug appearance
*/
reg32 = ioread32be(&memac->regs->command_config);
reg32 &= ~CMD_CFG_CRC_FWD;
iowrite32be(reg32, &memac->regs->command_config);
}
if (memac->phy_if == PHY_INTERFACE_MODE_SGMII) {
/* Configure internal SGMII PHY */
if (memac->basex_if)
setup_sgmii_internal_phy_base_x(memac);
else
setup_sgmii_internal_phy(memac, fixed_link);
} else if (memac->phy_if == PHY_INTERFACE_MODE_QSGMII) {
/* Configure 4 internal SGMII PHYs */
for (i = 0; i < 4; i++) {
u8 qsmgii_phy_addr, phy_addr;
/* QSGMII PHY address occupies 3 upper bits of 5-bit
* phy_address; the lower 2 bits are used to extend
* register address space and access each one of 4
* ports inside QSGMII.
*/
phy_addr = memac->pcsphy->mdio.addr;
qsmgii_phy_addr = (u8)((phy_addr << 2) | i);
memac->pcsphy->mdio.addr = qsmgii_phy_addr;
if (memac->basex_if)
setup_sgmii_internal_phy_base_x(memac);
else
setup_sgmii_internal_phy(memac, fixed_link);
memac->pcsphy->mdio.addr = phy_addr;
}
}
/* Max Frame Length */
err = fman_set_mac_max_frame(memac->fm, memac->mac_id,
memac_drv_param->max_frame_length);
if (err) {
pr_err("settings Mac max frame length is FAILED\n");
return err;
}
memac->multicast_addr_hash = alloc_hash_table(HASH_TABLE_SIZE);
if (!memac->multicast_addr_hash) {
free_init_resources(memac);
pr_err("allocation hash table is FAILED\n");
return -ENOMEM;
}
memac->unicast_addr_hash = alloc_hash_table(HASH_TABLE_SIZE);
if (!memac->unicast_addr_hash) {
free_init_resources(memac);
pr_err("allocation hash table is FAILED\n");
return -ENOMEM;
}
fman_register_intr(memac->fm, FMAN_MOD_MAC, memac->mac_id,
FMAN_INTR_TYPE_ERR, memac_err_exception, memac);
fman_register_intr(memac->fm, FMAN_MOD_MAC, memac->mac_id,
FMAN_INTR_TYPE_NORMAL, memac_exception, memac);
kfree(memac_drv_param);
memac->memac_drv_param = NULL;
return 0;
}
int memac_free(struct fman_mac *memac)
{
free_init_resources(memac);
if (memac->pcsphy)
put_device(&memac->pcsphy->mdio.dev);
kfree(memac->memac_drv_param);
kfree(memac);
return 0;
}
struct fman_mac *memac_config(struct fman_mac_params *params)
{
struct fman_mac *memac;
struct memac_cfg *memac_drv_param;
void __iomem *base_addr;
base_addr = params->base_addr;
/* allocate memory for the m_emac data structure */
memac = kzalloc(sizeof(*memac), GFP_KERNEL);
if (!memac)
return NULL;
/* allocate memory for the m_emac driver parameters data structure */
memac_drv_param = kzalloc(sizeof(*memac_drv_param), GFP_KERNEL);
if (!memac_drv_param) {
memac_free(memac);
return NULL;
}
/* Plant parameter structure pointer */
memac->memac_drv_param = memac_drv_param;
set_dflts(memac_drv_param);
memac->addr = ENET_ADDR_TO_UINT64(params->addr);
memac->regs = base_addr;
memac->max_speed = params->max_speed;
memac->phy_if = params->phy_if;
memac->mac_id = params->mac_id;
memac->exceptions = (MEMAC_IMASK_TSECC_ER | MEMAC_IMASK_TECC_ER |
MEMAC_IMASK_RECC_ER | MEMAC_IMASK_MGI);
memac->exception_cb = params->exception_cb;
memac->event_cb = params->event_cb;
memac->dev_id = params->dev_id;
memac->fm = params->fm;
memac->basex_if = params->basex_if;
/* Save FMan revision */
fman_get_revision(memac->fm, &memac->fm_rev_info);
if (memac->phy_if == PHY_INTERFACE_MODE_SGMII ||
memac->phy_if == PHY_INTERFACE_MODE_QSGMII) {
if (!params->internal_phy_node) {
pr_err("PCS PHY node is not available\n");
memac_free(memac);
return NULL;
}
memac->pcsphy = of_phy_find_device(params->internal_phy_node);
if (!memac->pcsphy) {
pr_err("of_phy_find_device (PCS PHY) failed\n");
memac_free(memac);
return NULL;
}
}
return memac;
}
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