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linux/drivers/net/ethernet/jme.c
Eric Dumazet 1eb2cded45 net: annotate writes on dev->mtu from ndo_change_mtu() 
Simon reported that ndo_change_mtu() methods were never
updated to use WRITE_ONCE(dev->mtu, new_mtu) as hinted
in commit 501a90c945 ("inet: protect against too small
mtu values.")

We read dev->mtu without holding RTNL in many places,
with READ_ONCE() annotations.

It is time to take care of ndo_change_mtu() methods
to use corresponding WRITE_ONCE()

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Simon Horman <horms@kernel.org>
Closes: https://lore.kernel.org/netdev/20240505144608.GB67882@kernel.org/
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Reviewed-by: Simon Horman <horms@kernel.org>
Acked-by: Shannon Nelson <shannon.nelson@amd.com>
Link: https://lore.kernel.org/r/20240506102812.3025432-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-05-07 16:19:14 -07:00

3282 lines
73 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0-only
/*
* JMicron JMC2x0 series PCIe Ethernet Linux Device Driver
*
* Copyright 2008 JMicron Technology Corporation
* https://www.jmicron.com/
* Copyright (c) 2009 - 2010 Guo-Fu Tseng <cooldavid@cooldavid.org>
*
* Author: Guo-Fu Tseng <cooldavid@cooldavid.org>
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/mii.h>
#include <linux/crc32.h>
#include <linux/delay.h>
#include <linux/spinlock.h>
#include <linux/in.h>
#include <linux/ip.h>
#include <linux/ipv6.h>
#include <linux/tcp.h>
#include <linux/udp.h>
#include <linux/if_vlan.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <net/ip6_checksum.h>
#include "jme.h"
static int force_pseudohp = -1;
static int no_pseudohp = -1;
static int no_extplug = -1;
module_param(force_pseudohp, int, 0);
MODULE_PARM_DESC(force_pseudohp,
"Enable pseudo hot-plug feature manually by driver instead of BIOS.");
module_param(no_pseudohp, int, 0);
MODULE_PARM_DESC(no_pseudohp, "Disable pseudo hot-plug feature.");
module_param(no_extplug, int, 0);
MODULE_PARM_DESC(no_extplug,
"Do not use external plug signal for pseudo hot-plug.");
static int
jme_mdio_read(struct net_device *netdev, int phy, int reg)
{
struct jme_adapter *jme = netdev_priv(netdev);
int i, val, again = (reg == MII_BMSR) ? 1 : 0;
read_again:
jwrite32(jme, JME_SMI, SMI_OP_REQ |
smi_phy_addr(phy) |
smi_reg_addr(reg));
wmb();
for (i = JME_PHY_TIMEOUT * 50 ; i > 0 ; --i) {
udelay(20);
val = jread32(jme, JME_SMI);
if ((val & SMI_OP_REQ) == 0)
break;
}
if (i == 0) {
pr_err("phy(%d) read timeout : %d\n", phy, reg);
return 0;
}
if (again--)
goto read_again;
return (val & SMI_DATA_MASK) >> SMI_DATA_SHIFT;
}
static void
jme_mdio_write(struct net_device *netdev,
int phy, int reg, int val)
{
struct jme_adapter *jme = netdev_priv(netdev);
int i;
jwrite32(jme, JME_SMI, SMI_OP_WRITE | SMI_OP_REQ |
((val << SMI_DATA_SHIFT) & SMI_DATA_MASK) |
smi_phy_addr(phy) | smi_reg_addr(reg));
wmb();
for (i = JME_PHY_TIMEOUT * 50 ; i > 0 ; --i) {
udelay(20);
if ((jread32(jme, JME_SMI) & SMI_OP_REQ) == 0)
break;
}
if (i == 0)
pr_err("phy(%d) write timeout : %d\n", phy, reg);
}
static inline void
jme_reset_phy_processor(struct jme_adapter *jme)
{
u32 val;
jme_mdio_write(jme->dev,
jme->mii_if.phy_id,
MII_ADVERTISE, ADVERTISE_ALL |
ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
if (jme->pdev->device == PCI_DEVICE_ID_JMICRON_JMC250)
jme_mdio_write(jme->dev,
jme->mii_if.phy_id,
MII_CTRL1000,
ADVERTISE_1000FULL | ADVERTISE_1000HALF);
val = jme_mdio_read(jme->dev,
jme->mii_if.phy_id,
MII_BMCR);
jme_mdio_write(jme->dev,
jme->mii_if.phy_id,
MII_BMCR, val | BMCR_RESET);
}
static void
jme_setup_wakeup_frame(struct jme_adapter *jme,
const u32 *mask, u32 crc, int fnr)
{
int i;
/*
* Setup CRC pattern
*/
jwrite32(jme, JME_WFOI, WFOI_CRC_SEL | (fnr & WFOI_FRAME_SEL));
wmb();
jwrite32(jme, JME_WFODP, crc);
wmb();
/*
* Setup Mask
*/
for (i = 0 ; i < WAKEUP_FRAME_MASK_DWNR ; ++i) {
jwrite32(jme, JME_WFOI,
((i << WFOI_MASK_SHIFT) & WFOI_MASK_SEL) |
(fnr & WFOI_FRAME_SEL));
wmb();
jwrite32(jme, JME_WFODP, mask[i]);
wmb();
}
}
static inline void
jme_mac_rxclk_off(struct jme_adapter *jme)
{
jme->reg_gpreg1 |= GPREG1_RXCLKOFF;
jwrite32f(jme, JME_GPREG1, jme->reg_gpreg1);
}
static inline void
jme_mac_rxclk_on(struct jme_adapter *jme)
{
jme->reg_gpreg1 &= ~GPREG1_RXCLKOFF;
jwrite32f(jme, JME_GPREG1, jme->reg_gpreg1);
}
static inline void
jme_mac_txclk_off(struct jme_adapter *jme)
{
jme->reg_ghc &= ~(GHC_TO_CLK_SRC | GHC_TXMAC_CLK_SRC);
jwrite32f(jme, JME_GHC, jme->reg_ghc);
}
static inline void
jme_mac_txclk_on(struct jme_adapter *jme)
{
u32 speed = jme->reg_ghc & GHC_SPEED;
if (speed == GHC_SPEED_1000M)
jme->reg_ghc |= GHC_TO_CLK_GPHY | GHC_TXMAC_CLK_GPHY;
else
jme->reg_ghc |= GHC_TO_CLK_PCIE | GHC_TXMAC_CLK_PCIE;
jwrite32f(jme, JME_GHC, jme->reg_ghc);
}
static inline void
jme_reset_ghc_speed(struct jme_adapter *jme)
{
jme->reg_ghc &= ~(GHC_SPEED | GHC_DPX);
jwrite32f(jme, JME_GHC, jme->reg_ghc);
}
static inline void
jme_reset_250A2_workaround(struct jme_adapter *jme)
{
jme->reg_gpreg1 &= ~(GPREG1_HALFMODEPATCH |
GPREG1_RSSPATCH);
jwrite32(jme, JME_GPREG1, jme->reg_gpreg1);
}
static inline void
jme_assert_ghc_reset(struct jme_adapter *jme)
{
jme->reg_ghc |= GHC_SWRST;
jwrite32f(jme, JME_GHC, jme->reg_ghc);
}
static inline void
jme_clear_ghc_reset(struct jme_adapter *jme)
{
jme->reg_ghc &= ~GHC_SWRST;
jwrite32f(jme, JME_GHC, jme->reg_ghc);
}
static void
jme_reset_mac_processor(struct jme_adapter *jme)
{
static const u32 mask[WAKEUP_FRAME_MASK_DWNR] = {0, 0, 0, 0};
u32 crc = 0xCDCDCDCD;
u32 gpreg0;
int i;
jme_reset_ghc_speed(jme);
jme_reset_250A2_workaround(jme);
jme_mac_rxclk_on(jme);
jme_mac_txclk_on(jme);
udelay(1);
jme_assert_ghc_reset(jme);
udelay(1);
jme_mac_rxclk_off(jme);
jme_mac_txclk_off(jme);
udelay(1);
jme_clear_ghc_reset(jme);
udelay(1);
jme_mac_rxclk_on(jme);
jme_mac_txclk_on(jme);
udelay(1);
jme_mac_rxclk_off(jme);
jme_mac_txclk_off(jme);
jwrite32(jme, JME_RXDBA_LO, 0x00000000);
jwrite32(jme, JME_RXDBA_HI, 0x00000000);
jwrite32(jme, JME_RXQDC, 0x00000000);
jwrite32(jme, JME_RXNDA, 0x00000000);
jwrite32(jme, JME_TXDBA_LO, 0x00000000);
jwrite32(jme, JME_TXDBA_HI, 0x00000000);
jwrite32(jme, JME_TXQDC, 0x00000000);
jwrite32(jme, JME_TXNDA, 0x00000000);
jwrite32(jme, JME_RXMCHT_LO, 0x00000000);
jwrite32(jme, JME_RXMCHT_HI, 0x00000000);
for (i = 0 ; i < WAKEUP_FRAME_NR ; ++i)
jme_setup_wakeup_frame(jme, mask, crc, i);
if (jme->fpgaver)
gpreg0 = GPREG0_DEFAULT | GPREG0_LNKINTPOLL;
else
gpreg0 = GPREG0_DEFAULT;
jwrite32(jme, JME_GPREG0, gpreg0);
}
static inline void
jme_clear_pm_enable_wol(struct jme_adapter *jme)
{
jwrite32(jme, JME_PMCS, PMCS_STMASK | jme->reg_pmcs);
}
static inline void
jme_clear_pm_disable_wol(struct jme_adapter *jme)
{
jwrite32(jme, JME_PMCS, PMCS_STMASK);
}
static int
jme_reload_eeprom(struct jme_adapter *jme)
{
u32 val;
int i;
val = jread32(jme, JME_SMBCSR);
if (val & SMBCSR_EEPROMD) {
val |= SMBCSR_CNACK;
jwrite32(jme, JME_SMBCSR, val);
val |= SMBCSR_RELOAD;
jwrite32(jme, JME_SMBCSR, val);
mdelay(12);
for (i = JME_EEPROM_RELOAD_TIMEOUT; i > 0; --i) {
mdelay(1);
if ((jread32(jme, JME_SMBCSR) & SMBCSR_RELOAD) == 0)
break;
}
if (i == 0) {
pr_err("eeprom reload timeout\n");
return -EIO;
}
}
return 0;
}
static void
jme_load_macaddr(struct net_device *netdev)
{
struct jme_adapter *jme = netdev_priv(netdev);
unsigned char macaddr[ETH_ALEN];
u32 val;
spin_lock_bh(&jme->macaddr_lock);
val = jread32(jme, JME_RXUMA_LO);
macaddr[0] = (val >> 0) & 0xFF;
macaddr[1] = (val >> 8) & 0xFF;
macaddr[2] = (val >> 16) & 0xFF;
macaddr[3] = (val >> 24) & 0xFF;
val = jread32(jme, JME_RXUMA_HI);
macaddr[4] = (val >> 0) & 0xFF;
macaddr[5] = (val >> 8) & 0xFF;
eth_hw_addr_set(netdev, macaddr);
spin_unlock_bh(&jme->macaddr_lock);
}
static inline void
jme_set_rx_pcc(struct jme_adapter *jme, int p)
{
switch (p) {
case PCC_OFF:
jwrite32(jme, JME_PCCRX0,
((PCC_OFF_TO << PCCRXTO_SHIFT) & PCCRXTO_MASK) |
((PCC_OFF_CNT << PCCRX_SHIFT) & PCCRX_MASK));
break;
case PCC_P1:
jwrite32(jme, JME_PCCRX0,
((PCC_P1_TO << PCCRXTO_SHIFT) & PCCRXTO_MASK) |
((PCC_P1_CNT << PCCRX_SHIFT) & PCCRX_MASK));
break;
case PCC_P2:
jwrite32(jme, JME_PCCRX0,
((PCC_P2_TO << PCCRXTO_SHIFT) & PCCRXTO_MASK) |
((PCC_P2_CNT << PCCRX_SHIFT) & PCCRX_MASK));
break;
case PCC_P3:
jwrite32(jme, JME_PCCRX0,
((PCC_P3_TO << PCCRXTO_SHIFT) & PCCRXTO_MASK) |
((PCC_P3_CNT << PCCRX_SHIFT) & PCCRX_MASK));
break;
default:
break;
}
wmb();
if (!(test_bit(JME_FLAG_POLL, &jme->flags)))
netif_info(jme, rx_status, jme->dev, "Switched to PCC_P%d\n", p);
}
static void
jme_start_irq(struct jme_adapter *jme)
{
register struct dynpcc_info *dpi = &(jme->dpi);
jme_set_rx_pcc(jme, PCC_P1);
dpi->cur = PCC_P1;
dpi->attempt = PCC_P1;
dpi->cnt = 0;
jwrite32(jme, JME_PCCTX,
((PCC_TX_TO << PCCTXTO_SHIFT) & PCCTXTO_MASK) |
((PCC_TX_CNT << PCCTX_SHIFT) & PCCTX_MASK) |
PCCTXQ0_EN
);
/*
* Enable Interrupts
*/
jwrite32(jme, JME_IENS, INTR_ENABLE);
}
static inline void
jme_stop_irq(struct jme_adapter *jme)
{
/*
* Disable Interrupts
*/
jwrite32f(jme, JME_IENC, INTR_ENABLE);
}
static u32
jme_linkstat_from_phy(struct jme_adapter *jme)
{
u32 phylink, bmsr;
phylink = jme_mdio_read(jme->dev, jme->mii_if.phy_id, 17);
bmsr = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_BMSR);
if (bmsr & BMSR_ANCOMP)
phylink |= PHY_LINK_AUTONEG_COMPLETE;
return phylink;
}
static inline void
jme_set_phyfifo_5level(struct jme_adapter *jme)
{
jme_mdio_write(jme->dev, jme->mii_if.phy_id, 27, 0x0004);
}
static inline void
jme_set_phyfifo_8level(struct jme_adapter *jme)
{
jme_mdio_write(jme->dev, jme->mii_if.phy_id, 27, 0x0000);
}
static int
jme_check_link(struct net_device *netdev, int testonly)
{
struct jme_adapter *jme = netdev_priv(netdev);
u32 phylink, cnt = JME_SPDRSV_TIMEOUT, bmcr;
char linkmsg[64];
int rc = 0;
linkmsg[0] = '\0';
if (jme->fpgaver)
phylink = jme_linkstat_from_phy(jme);
else
phylink = jread32(jme, JME_PHY_LINK);
if (phylink & PHY_LINK_UP) {
if (!(phylink & PHY_LINK_AUTONEG_COMPLETE)) {
/*
* If we did not enable AN
* Speed/Duplex Info should be obtained from SMI
*/
phylink = PHY_LINK_UP;
bmcr = jme_mdio_read(jme->dev,
jme->mii_if.phy_id,
MII_BMCR);
phylink |= ((bmcr & BMCR_SPEED1000) &&
(bmcr & BMCR_SPEED100) == 0) ?
PHY_LINK_SPEED_1000M :
(bmcr & BMCR_SPEED100) ?
PHY_LINK_SPEED_100M :
PHY_LINK_SPEED_10M;
phylink |= (bmcr & BMCR_FULLDPLX) ?
PHY_LINK_DUPLEX : 0;
strcat(linkmsg, "Forced: ");
} else {
/*
* Keep polling for speed/duplex resolve complete
*/
while (!(phylink & PHY_LINK_SPEEDDPU_RESOLVED) &&
--cnt) {
udelay(1);
if (jme->fpgaver)
phylink = jme_linkstat_from_phy(jme);
else
phylink = jread32(jme, JME_PHY_LINK);
}
if (!cnt)
pr_err("Waiting speed resolve timeout\n");
strcat(linkmsg, "ANed: ");
}
if (jme->phylink == phylink) {
rc = 1;
goto out;
}
if (testonly)
goto out;
jme->phylink = phylink;
/*
* The speed/duplex setting of jme->reg_ghc already cleared
* by jme_reset_mac_processor()
*/
switch (phylink & PHY_LINK_SPEED_MASK) {
case PHY_LINK_SPEED_10M:
jme->reg_ghc |= GHC_SPEED_10M;
strcat(linkmsg, "10 Mbps, ");
break;
case PHY_LINK_SPEED_100M:
jme->reg_ghc |= GHC_SPEED_100M;
strcat(linkmsg, "100 Mbps, ");
break;
case PHY_LINK_SPEED_1000M:
jme->reg_ghc |= GHC_SPEED_1000M;
strcat(linkmsg, "1000 Mbps, ");
break;
default:
break;
}
if (phylink & PHY_LINK_DUPLEX) {
jwrite32(jme, JME_TXMCS, TXMCS_DEFAULT);
jwrite32(jme, JME_TXTRHD, TXTRHD_FULLDUPLEX);
jme->reg_ghc |= GHC_DPX;
} else {
jwrite32(jme, JME_TXMCS, TXMCS_DEFAULT |
TXMCS_BACKOFF |
TXMCS_CARRIERSENSE |
TXMCS_COLLISION);
jwrite32(jme, JME_TXTRHD, TXTRHD_HALFDUPLEX);
}
jwrite32(jme, JME_GHC, jme->reg_ghc);
if (is_buggy250(jme->pdev->device, jme->chiprev)) {
jme->reg_gpreg1 &= ~(GPREG1_HALFMODEPATCH |
GPREG1_RSSPATCH);
if (!(phylink & PHY_LINK_DUPLEX))
jme->reg_gpreg1 |= GPREG1_HALFMODEPATCH;
switch (phylink & PHY_LINK_SPEED_MASK) {
case PHY_LINK_SPEED_10M:
jme_set_phyfifo_8level(jme);
jme->reg_gpreg1 |= GPREG1_RSSPATCH;
break;
case PHY_LINK_SPEED_100M:
jme_set_phyfifo_5level(jme);
jme->reg_gpreg1 |= GPREG1_RSSPATCH;
break;
case PHY_LINK_SPEED_1000M:
jme_set_phyfifo_8level(jme);
break;
default:
break;
}
}
jwrite32(jme, JME_GPREG1, jme->reg_gpreg1);
strcat(linkmsg, (phylink & PHY_LINK_DUPLEX) ?
"Full-Duplex, " :
"Half-Duplex, ");
strcat(linkmsg, (phylink & PHY_LINK_MDI_STAT) ?
"MDI-X" :
"MDI");
netif_info(jme, link, jme->dev, "Link is up at %s\n", linkmsg);
netif_carrier_on(netdev);
} else {
if (testonly)
goto out;
netif_info(jme, link, jme->dev, "Link is down\n");
jme->phylink = 0;
netif_carrier_off(netdev);
}
out:
return rc;
}
static int
jme_setup_tx_resources(struct jme_adapter *jme)
{
struct jme_ring *txring = &(jme->txring[0]);
txring->alloc = dma_alloc_coherent(&(jme->pdev->dev),
TX_RING_ALLOC_SIZE(jme->tx_ring_size),
&(txring->dmaalloc),
GFP_ATOMIC);
if (!txring->alloc)
goto err_set_null;
/*
* 16 Bytes align
*/
txring->desc = (void *)ALIGN((unsigned long)(txring->alloc),
RING_DESC_ALIGN);
txring->dma = ALIGN(txring->dmaalloc, RING_DESC_ALIGN);
txring->next_to_use = 0;
atomic_set(&txring->next_to_clean, 0);
atomic_set(&txring->nr_free, jme->tx_ring_size);
txring->bufinf = kcalloc(jme->tx_ring_size,
sizeof(struct jme_buffer_info),
GFP_ATOMIC);
if (unlikely(!(txring->bufinf)))
goto err_free_txring;
return 0;
err_free_txring:
dma_free_coherent(&(jme->pdev->dev),
TX_RING_ALLOC_SIZE(jme->tx_ring_size),
txring->alloc,
txring->dmaalloc);
err_set_null:
txring->desc = NULL;
txring->dmaalloc = 0;
txring->dma = 0;
txring->bufinf = NULL;
return -ENOMEM;
}
static void
jme_free_tx_resources(struct jme_adapter *jme)
{
int i;
struct jme_ring *txring = &(jme->txring[0]);
struct jme_buffer_info *txbi;
if (txring->alloc) {
if (txring->bufinf) {
for (i = 0 ; i < jme->tx_ring_size ; ++i) {
txbi = txring->bufinf + i;
if (txbi->skb) {
dev_kfree_skb(txbi->skb);
txbi->skb = NULL;
}
txbi->mapping = 0;
txbi->len = 0;
txbi->nr_desc = 0;
txbi->start_xmit = 0;
}
kfree(txring->bufinf);
}
dma_free_coherent(&(jme->pdev->dev),
TX_RING_ALLOC_SIZE(jme->tx_ring_size),
txring->alloc,
txring->dmaalloc);
txring->alloc = NULL;
txring->desc = NULL;
txring->dmaalloc = 0;
txring->dma = 0;
txring->bufinf = NULL;
}
txring->next_to_use = 0;
atomic_set(&txring->next_to_clean, 0);
atomic_set(&txring->nr_free, 0);
}
static inline void
jme_enable_tx_engine(struct jme_adapter *jme)
{
/*
* Select Queue 0
*/
jwrite32(jme, JME_TXCS, TXCS_DEFAULT | TXCS_SELECT_QUEUE0);
wmb();
/*
* Setup TX Queue 0 DMA Bass Address
*/
jwrite32(jme, JME_TXDBA_LO, (__u64)jme->txring[0].dma & 0xFFFFFFFFUL);
jwrite32(jme, JME_TXDBA_HI, (__u64)(jme->txring[0].dma) >> 32);
jwrite32(jme, JME_TXNDA, (__u64)jme->txring[0].dma & 0xFFFFFFFFUL);
/*
* Setup TX Descptor Count
*/
jwrite32(jme, JME_TXQDC, jme->tx_ring_size);
/*
* Enable TX Engine
*/
wmb();
jwrite32f(jme, JME_TXCS, jme->reg_txcs |
TXCS_SELECT_QUEUE0 |
TXCS_ENABLE);
/*
* Start clock for TX MAC Processor
*/
jme_mac_txclk_on(jme);
}
static inline void
jme_disable_tx_engine(struct jme_adapter *jme)
{
int i;
u32 val;
/*
* Disable TX Engine
*/
jwrite32(jme, JME_TXCS, jme->reg_txcs | TXCS_SELECT_QUEUE0);
wmb();
val = jread32(jme, JME_TXCS);
for (i = JME_TX_DISABLE_TIMEOUT ; (val & TXCS_ENABLE) && i > 0 ; --i) {
mdelay(1);
val = jread32(jme, JME_TXCS);
rmb();
}
if (!i)
pr_err("Disable TX engine timeout\n");
/*
* Stop clock for TX MAC Processor
*/
jme_mac_txclk_off(jme);
}
static void
jme_set_clean_rxdesc(struct jme_adapter *jme, int i)
{
struct jme_ring *rxring = &(jme->rxring[0]);
register struct rxdesc *rxdesc = rxring->desc;
struct jme_buffer_info *rxbi = rxring->bufinf;
rxdesc += i;
rxbi += i;
rxdesc->dw[0] = 0;
rxdesc->dw[1] = 0;
rxdesc->desc1.bufaddrh = cpu_to_le32((__u64)rxbi->mapping >> 32);
rxdesc->desc1.bufaddrl = cpu_to_le32(
(__u64)rxbi->mapping & 0xFFFFFFFFUL);
rxdesc->desc1.datalen = cpu_to_le16(rxbi->len);
if (jme->dev->features & NETIF_F_HIGHDMA)
rxdesc->desc1.flags = RXFLAG_64BIT;
wmb();
rxdesc->desc1.flags |= RXFLAG_OWN | RXFLAG_INT;
}
static int
jme_make_new_rx_buf(struct jme_adapter *jme, int i)
{
struct jme_ring *rxring = &(jme->rxring[0]);
struct jme_buffer_info *rxbi = rxring->bufinf + i;
struct sk_buff *skb;
dma_addr_t mapping;
skb = netdev_alloc_skb(jme->dev,
jme->dev->mtu + RX_EXTRA_LEN);
if (unlikely(!skb))
return -ENOMEM;
mapping = dma_map_page(&jme->pdev->dev, virt_to_page(skb->data),
offset_in_page(skb->data), skb_tailroom(skb),
DMA_FROM_DEVICE);
if (unlikely(dma_mapping_error(&jme->pdev->dev, mapping))) {
dev_kfree_skb(skb);
return -ENOMEM;
}
if (likely(rxbi->mapping))
dma_unmap_page(&jme->pdev->dev, rxbi->mapping, rxbi->len,
DMA_FROM_DEVICE);
rxbi->skb = skb;
rxbi->len = skb_tailroom(skb);
rxbi->mapping = mapping;
return 0;
}
static void
jme_free_rx_buf(struct jme_adapter *jme, int i)
{
struct jme_ring *rxring = &(jme->rxring[0]);
struct jme_buffer_info *rxbi = rxring->bufinf;
rxbi += i;
if (rxbi->skb) {
dma_unmap_page(&jme->pdev->dev, rxbi->mapping, rxbi->len,
DMA_FROM_DEVICE);
dev_kfree_skb(rxbi->skb);
rxbi->skb = NULL;
rxbi->mapping = 0;
rxbi->len = 0;
}
}
static void
jme_free_rx_resources(struct jme_adapter *jme)
{
int i;
struct jme_ring *rxring = &(jme->rxring[0]);
if (rxring->alloc) {
if (rxring->bufinf) {
for (i = 0 ; i < jme->rx_ring_size ; ++i)
jme_free_rx_buf(jme, i);
kfree(rxring->bufinf);
}
dma_free_coherent(&(jme->pdev->dev),
RX_RING_ALLOC_SIZE(jme->rx_ring_size),
rxring->alloc,
rxring->dmaalloc);
rxring->alloc = NULL;
rxring->desc = NULL;
rxring->dmaalloc = 0;
rxring->dma = 0;
rxring->bufinf = NULL;
}
rxring->next_to_use = 0;
atomic_set(&rxring->next_to_clean, 0);
}
static int
jme_setup_rx_resources(struct jme_adapter *jme)
{
int i;
struct jme_ring *rxring = &(jme->rxring[0]);
rxring->alloc = dma_alloc_coherent(&(jme->pdev->dev),
RX_RING_ALLOC_SIZE(jme->rx_ring_size),
&(rxring->dmaalloc),
GFP_ATOMIC);
if (!rxring->alloc)
goto err_set_null;
/*
* 16 Bytes align
*/
rxring->desc = (void *)ALIGN((unsigned long)(rxring->alloc),
RING_DESC_ALIGN);
rxring->dma = ALIGN(rxring->dmaalloc, RING_DESC_ALIGN);
rxring->next_to_use = 0;
atomic_set(&rxring->next_to_clean, 0);
rxring->bufinf = kcalloc(jme->rx_ring_size,
sizeof(struct jme_buffer_info),
GFP_ATOMIC);
if (unlikely(!(rxring->bufinf)))
goto err_free_rxring;
/*
* Initiallize Receive Descriptors
*/
for (i = 0 ; i < jme->rx_ring_size ; ++i) {
if (unlikely(jme_make_new_rx_buf(jme, i))) {
jme_free_rx_resources(jme);
return -ENOMEM;
}
jme_set_clean_rxdesc(jme, i);
}
return 0;
err_free_rxring:
dma_free_coherent(&(jme->pdev->dev),
RX_RING_ALLOC_SIZE(jme->rx_ring_size),
rxring->alloc,
rxring->dmaalloc);
err_set_null:
rxring->desc = NULL;
rxring->dmaalloc = 0;
rxring->dma = 0;
rxring->bufinf = NULL;
return -ENOMEM;
}
static inline void
jme_enable_rx_engine(struct jme_adapter *jme)
{
/*
* Select Queue 0
*/
jwrite32(jme, JME_RXCS, jme->reg_rxcs |
RXCS_QUEUESEL_Q0);
wmb();
/*
* Setup RX DMA Bass Address
*/
jwrite32(jme, JME_RXDBA_LO, (__u64)(jme->rxring[0].dma) & 0xFFFFFFFFUL);
jwrite32(jme, JME_RXDBA_HI, (__u64)(jme->rxring[0].dma) >> 32);
jwrite32(jme, JME_RXNDA, (__u64)(jme->rxring[0].dma) & 0xFFFFFFFFUL);
/*
* Setup RX Descriptor Count
*/
jwrite32(jme, JME_RXQDC, jme->rx_ring_size);
/*
* Setup Unicast Filter
*/
jme_set_unicastaddr(jme->dev);
jme_set_multi(jme->dev);
/*
* Enable RX Engine
*/
wmb();
jwrite32f(jme, JME_RXCS, jme->reg_rxcs |
RXCS_QUEUESEL_Q0 |
RXCS_ENABLE |
RXCS_QST);
/*
* Start clock for RX MAC Processor
*/
jme_mac_rxclk_on(jme);
}
static inline void
jme_restart_rx_engine(struct jme_adapter *jme)
{
/*
* Start RX Engine
*/
jwrite32(jme, JME_RXCS, jme->reg_rxcs |
RXCS_QUEUESEL_Q0 |
RXCS_ENABLE |
RXCS_QST);
}
static inline void
jme_disable_rx_engine(struct jme_adapter *jme)
{
int i;
u32 val;
/*
* Disable RX Engine
*/
jwrite32(jme, JME_RXCS, jme->reg_rxcs);
wmb();
val = jread32(jme, JME_RXCS);
for (i = JME_RX_DISABLE_TIMEOUT ; (val & RXCS_ENABLE) && i > 0 ; --i) {
mdelay(1);
val = jread32(jme, JME_RXCS);
rmb();
}
if (!i)
pr_err("Disable RX engine timeout\n");
/*
* Stop clock for RX MAC Processor
*/
jme_mac_rxclk_off(jme);
}
static u16
jme_udpsum(struct sk_buff *skb)
{
u16 csum = 0xFFFFu;
if (skb->len < (ETH_HLEN + sizeof(struct iphdr)))
return csum;
if (skb->protocol != htons(ETH_P_IP))
return csum;
skb_set_network_header(skb, ETH_HLEN);
if ((ip_hdr(skb)->protocol != IPPROTO_UDP) ||
(skb->len < (ETH_HLEN +
(ip_hdr(skb)->ihl << 2) +
sizeof(struct udphdr)))) {
skb_reset_network_header(skb);
return csum;
}
skb_set_transport_header(skb,
ETH_HLEN + (ip_hdr(skb)->ihl << 2));
csum = udp_hdr(skb)->check;
skb_reset_transport_header(skb);
skb_reset_network_header(skb);
return csum;
}
static int
jme_rxsum_ok(struct jme_adapter *jme, u16 flags, struct sk_buff *skb)
{
if (!(flags & (RXWBFLAG_TCPON | RXWBFLAG_UDPON | RXWBFLAG_IPV4)))
return false;
if (unlikely((flags & (RXWBFLAG_MF | RXWBFLAG_TCPON | RXWBFLAG_TCPCS))
== RXWBFLAG_TCPON)) {
if (flags & RXWBFLAG_IPV4)
netif_err(jme, rx_err, jme->dev, "TCP Checksum error\n");
return false;
}
if (unlikely((flags & (RXWBFLAG_MF | RXWBFLAG_UDPON | RXWBFLAG_UDPCS))
== RXWBFLAG_UDPON) && jme_udpsum(skb)) {
if (flags & RXWBFLAG_IPV4)
netif_err(jme, rx_err, jme->dev, "UDP Checksum error\n");
return false;
}
if (unlikely((flags & (RXWBFLAG_IPV4 | RXWBFLAG_IPCS))
== RXWBFLAG_IPV4)) {
netif_err(jme, rx_err, jme->dev, "IPv4 Checksum error\n");
return false;
}
return true;
}
static void
jme_alloc_and_feed_skb(struct jme_adapter *jme, int idx)
{
struct jme_ring *rxring = &(jme->rxring[0]);
struct rxdesc *rxdesc = rxring->desc;
struct jme_buffer_info *rxbi = rxring->bufinf;
struct sk_buff *skb;
int framesize;
rxdesc += idx;
rxbi += idx;
skb = rxbi->skb;
dma_sync_single_for_cpu(&jme->pdev->dev, rxbi->mapping, rxbi->len,
DMA_FROM_DEVICE);
if (unlikely(jme_make_new_rx_buf(jme, idx))) {
dma_sync_single_for_device(&jme->pdev->dev, rxbi->mapping,
rxbi->len, DMA_FROM_DEVICE);
++(NET_STAT(jme).rx_dropped);
} else {
framesize = le16_to_cpu(rxdesc->descwb.framesize)
- RX_PREPAD_SIZE;
skb_reserve(skb, RX_PREPAD_SIZE);
skb_put(skb, framesize);
skb->protocol = eth_type_trans(skb, jme->dev);
if (jme_rxsum_ok(jme, le16_to_cpu(rxdesc->descwb.flags), skb))
skb->ip_summed = CHECKSUM_UNNECESSARY;
else
skb_checksum_none_assert(skb);
if (rxdesc->descwb.flags & cpu_to_le16(RXWBFLAG_TAGON)) {
u16 vid = le16_to_cpu(rxdesc->descwb.vlan);
__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
NET_STAT(jme).rx_bytes += 4;
}
jme->jme_rx(skb);
if ((rxdesc->descwb.flags & cpu_to_le16(RXWBFLAG_DEST)) ==
cpu_to_le16(RXWBFLAG_DEST_MUL))
++(NET_STAT(jme).multicast);
NET_STAT(jme).rx_bytes += framesize;
++(NET_STAT(jme).rx_packets);
}
jme_set_clean_rxdesc(jme, idx);
}
static int
jme_process_receive(struct jme_adapter *jme, int limit)
{
struct jme_ring *rxring = &(jme->rxring[0]);
struct rxdesc *rxdesc;
int i, j, ccnt, desccnt, mask = jme->rx_ring_mask;
if (unlikely(!atomic_dec_and_test(&jme->rx_cleaning)))
goto out_inc;
if (unlikely(atomic_read(&jme->link_changing) != 1))
goto out_inc;
if (unlikely(!netif_carrier_ok(jme->dev)))
goto out_inc;
i = atomic_read(&rxring->next_to_clean);
while (limit > 0) {
rxdesc = rxring->desc;
rxdesc += i;
if ((rxdesc->descwb.flags & cpu_to_le16(RXWBFLAG_OWN)) ||
!(rxdesc->descwb.desccnt & RXWBDCNT_WBCPL))
goto out;
--limit;
rmb();
desccnt = rxdesc->descwb.desccnt & RXWBDCNT_DCNT;
if (unlikely(desccnt > 1 ||
rxdesc->descwb.errstat & RXWBERR_ALLERR)) {
if (rxdesc->descwb.errstat & RXWBERR_CRCERR)
++(NET_STAT(jme).rx_crc_errors);
else if (rxdesc->descwb.errstat & RXWBERR_OVERUN)
++(NET_STAT(jme).rx_fifo_errors);
else
++(NET_STAT(jme).rx_errors);
if (desccnt > 1)
limit -= desccnt - 1;
for (j = i, ccnt = desccnt ; ccnt-- ; ) {
jme_set_clean_rxdesc(jme, j);
j = (j + 1) & (mask);
}
} else {
jme_alloc_and_feed_skb(jme, i);
}
i = (i + desccnt) & (mask);
}
out:
atomic_set(&rxring->next_to_clean, i);
out_inc:
atomic_inc(&jme->rx_cleaning);
return limit > 0 ? limit : 0;
}
static void
jme_attempt_pcc(struct dynpcc_info *dpi, int atmp)
{
if (likely(atmp == dpi->cur)) {
dpi->cnt = 0;
return;
}
if (dpi->attempt == atmp) {
++(dpi->cnt);
} else {
dpi->attempt = atmp;
dpi->cnt = 0;
}
}
static void
jme_dynamic_pcc(struct jme_adapter *jme)
{
register struct dynpcc_info *dpi = &(jme->dpi);
if ((NET_STAT(jme).rx_bytes - dpi->last_bytes) > PCC_P3_THRESHOLD)
jme_attempt_pcc(dpi, PCC_P3);
else if ((NET_STAT(jme).rx_packets - dpi->last_pkts) > PCC_P2_THRESHOLD ||
dpi->intr_cnt > PCC_INTR_THRESHOLD)
jme_attempt_pcc(dpi, PCC_P2);
else
jme_attempt_pcc(dpi, PCC_P1);
if (unlikely(dpi->attempt != dpi->cur && dpi->cnt > 5)) {
if (dpi->attempt < dpi->cur)
tasklet_schedule(&jme->rxclean_task);
jme_set_rx_pcc(jme, dpi->attempt);
dpi->cur = dpi->attempt;
dpi->cnt = 0;
}
}
static void
jme_start_pcc_timer(struct jme_adapter *jme)
{
struct dynpcc_info *dpi = &(jme->dpi);
dpi->last_bytes = NET_STAT(jme).rx_bytes;
dpi->last_pkts = NET_STAT(jme).rx_packets;
dpi->intr_cnt = 0;
jwrite32(jme, JME_TMCSR,
TMCSR_EN | ((0xFFFFFF - PCC_INTERVAL_US) & TMCSR_CNT));
}
static inline void
jme_stop_pcc_timer(struct jme_adapter *jme)
{
jwrite32(jme, JME_TMCSR, 0);
}
static void
jme_shutdown_nic(struct jme_adapter *jme)
{
u32 phylink;
phylink = jme_linkstat_from_phy(jme);
if (!(phylink & PHY_LINK_UP)) {
/*
* Disable all interrupt before issue timer
*/
jme_stop_irq(jme);
jwrite32(jme, JME_TIMER2, TMCSR_EN | 0xFFFFFE);
}
}
static void
jme_pcc_tasklet(struct tasklet_struct *t)
{
struct jme_adapter *jme = from_tasklet(jme, t, pcc_task);
struct net_device *netdev = jme->dev;
if (unlikely(test_bit(JME_FLAG_SHUTDOWN, &jme->flags))) {
jme_shutdown_nic(jme);
return;
}
if (unlikely(!netif_carrier_ok(netdev) ||
(atomic_read(&jme->link_changing) != 1)
)) {
jme_stop_pcc_timer(jme);
return;
}
if (!(test_bit(JME_FLAG_POLL, &jme->flags)))
jme_dynamic_pcc(jme);
jme_start_pcc_timer(jme);
}
static inline void
jme_polling_mode(struct jme_adapter *jme)
{
jme_set_rx_pcc(jme, PCC_OFF);
}
static inline void
jme_interrupt_mode(struct jme_adapter *jme)
{
jme_set_rx_pcc(jme, PCC_P1);
}
static inline int
jme_pseudo_hotplug_enabled(struct jme_adapter *jme)
{
u32 apmc;
apmc = jread32(jme, JME_APMC);
return apmc & JME_APMC_PSEUDO_HP_EN;
}
static void
jme_start_shutdown_timer(struct jme_adapter *jme)
{
u32 apmc;
apmc = jread32(jme, JME_APMC) | JME_APMC_PCIE_SD_EN;
apmc &= ~JME_APMC_EPIEN_CTRL;
if (!no_extplug) {
jwrite32f(jme, JME_APMC, apmc | JME_APMC_EPIEN_CTRL_EN);
wmb();
}
jwrite32f(jme, JME_APMC, apmc);
jwrite32f(jme, JME_TIMER2, 0);
set_bit(JME_FLAG_SHUTDOWN, &jme->flags);
jwrite32(jme, JME_TMCSR,
TMCSR_EN | ((0xFFFFFF - APMC_PHP_SHUTDOWN_DELAY) & TMCSR_CNT));
}
static void
jme_stop_shutdown_timer(struct jme_adapter *jme)
{
u32 apmc;
jwrite32f(jme, JME_TMCSR, 0);
jwrite32f(jme, JME_TIMER2, 0);
clear_bit(JME_FLAG_SHUTDOWN, &jme->flags);
apmc = jread32(jme, JME_APMC);
apmc &= ~(JME_APMC_PCIE_SD_EN | JME_APMC_EPIEN_CTRL);
jwrite32f(jme, JME_APMC, apmc | JME_APMC_EPIEN_CTRL_DIS);
wmb();
jwrite32f(jme, JME_APMC, apmc);
}
static void jme_link_change_work(struct work_struct *work)
{
struct jme_adapter *jme = container_of(work, struct jme_adapter, linkch_task);
struct net_device *netdev = jme->dev;
int rc;
while (!atomic_dec_and_test(&jme->link_changing)) {
atomic_inc(&jme->link_changing);
netif_info(jme, intr, jme->dev, "Get link change lock failed\n");
while (atomic_read(&jme->link_changing) != 1)
netif_info(jme, intr, jme->dev, "Waiting link change lock\n");
}
if (jme_check_link(netdev, 1) && jme->old_mtu == netdev->mtu)
goto out;
jme->old_mtu = netdev->mtu;
netif_stop_queue(netdev);
if (jme_pseudo_hotplug_enabled(jme))
jme_stop_shutdown_timer(jme);
jme_stop_pcc_timer(jme);
tasklet_disable(&jme->txclean_task);
tasklet_disable(&jme->rxclean_task);
tasklet_disable(&jme->rxempty_task);
if (netif_carrier_ok(netdev)) {
jme_disable_rx_engine(jme);
jme_disable_tx_engine(jme);
jme_reset_mac_processor(jme);
jme_free_rx_resources(jme);
jme_free_tx_resources(jme);
if (test_bit(JME_FLAG_POLL, &jme->flags))
jme_polling_mode(jme);
netif_carrier_off(netdev);
}
jme_check_link(netdev, 0);
if (netif_carrier_ok(netdev)) {
rc = jme_setup_rx_resources(jme);
if (rc) {
pr_err("Allocating resources for RX error, Device STOPPED!\n");
goto out_enable_tasklet;
}
rc = jme_setup_tx_resources(jme);
if (rc) {
pr_err("Allocating resources for TX error, Device STOPPED!\n");
goto err_out_free_rx_resources;
}
jme_enable_rx_engine(jme);
jme_enable_tx_engine(jme);
netif_start_queue(netdev);
if (test_bit(JME_FLAG_POLL, &jme->flags))
jme_interrupt_mode(jme);
jme_start_pcc_timer(jme);
} else if (jme_pseudo_hotplug_enabled(jme)) {
jme_start_shutdown_timer(jme);
}
goto out_enable_tasklet;
err_out_free_rx_resources:
jme_free_rx_resources(jme);
out_enable_tasklet:
tasklet_enable(&jme->txclean_task);
tasklet_enable(&jme->rxclean_task);
tasklet_enable(&jme->rxempty_task);
out:
atomic_inc(&jme->link_changing);
}
static void
jme_rx_clean_tasklet(struct tasklet_struct *t)
{
struct jme_adapter *jme = from_tasklet(jme, t, rxclean_task);
struct dynpcc_info *dpi = &(jme->dpi);
jme_process_receive(jme, jme->rx_ring_size);
++(dpi->intr_cnt);
}
static int
jme_poll(JME_NAPI_HOLDER(holder), JME_NAPI_WEIGHT(budget))
{
struct jme_adapter *jme = jme_napi_priv(holder);
int rest;
rest = jme_process_receive(jme, JME_NAPI_WEIGHT_VAL(budget));
while (atomic_read(&jme->rx_empty) > 0) {
atomic_dec(&jme->rx_empty);
++(NET_STAT(jme).rx_dropped);
jme_restart_rx_engine(jme);
}
atomic_inc(&jme->rx_empty);
if (rest) {
JME_RX_COMPLETE(netdev, holder);
jme_interrupt_mode(jme);
}
JME_NAPI_WEIGHT_SET(budget, rest);
return JME_NAPI_WEIGHT_VAL(budget) - rest;
}
static void
jme_rx_empty_tasklet(struct tasklet_struct *t)
{
struct jme_adapter *jme = from_tasklet(jme, t, rxempty_task);
if (unlikely(atomic_read(&jme->link_changing) != 1))
return;
if (unlikely(!netif_carrier_ok(jme->dev)))
return;
netif_info(jme, rx_status, jme->dev, "RX Queue Full!\n");
jme_rx_clean_tasklet(&jme->rxclean_task);
while (atomic_read(&jme->rx_empty) > 0) {
atomic_dec(&jme->rx_empty);
++(NET_STAT(jme).rx_dropped);
jme_restart_rx_engine(jme);
}
atomic_inc(&jme->rx_empty);
}
static void
jme_wake_queue_if_stopped(struct jme_adapter *jme)
{
struct jme_ring *txring = &(jme->txring[0]);
smp_wmb();
if (unlikely(netif_queue_stopped(jme->dev) &&
atomic_read(&txring->nr_free) >= (jme->tx_wake_threshold))) {
netif_info(jme, tx_done, jme->dev, "TX Queue Waked\n");
netif_wake_queue(jme->dev);
}
}
static void jme_tx_clean_tasklet(struct tasklet_struct *t)
{
struct jme_adapter *jme = from_tasklet(jme, t, txclean_task);
struct jme_ring *txring = &(jme->txring[0]);
struct txdesc *txdesc = txring->desc;
struct jme_buffer_info *txbi = txring->bufinf, *ctxbi, *ttxbi;
int i, j, cnt = 0, max, err, mask;
tx_dbg(jme, "Into txclean\n");
if (unlikely(!atomic_dec_and_test(&jme->tx_cleaning)))
goto out;
if (unlikely(atomic_read(&jme->link_changing) != 1))
goto out;
if (unlikely(!netif_carrier_ok(jme->dev)))
goto out;
max = jme->tx_ring_size - atomic_read(&txring->nr_free);
mask = jme->tx_ring_mask;
for (i = atomic_read(&txring->next_to_clean) ; cnt < max ; ) {
ctxbi = txbi + i;
if (likely(ctxbi->skb &&
!(txdesc[i].descwb.flags & TXWBFLAG_OWN))) {
tx_dbg(jme, "txclean: %d+%d@%lu\n",
i, ctxbi->nr_desc, jiffies);
err = txdesc[i].descwb.flags & TXWBFLAG_ALLERR;
for (j = 1 ; j < ctxbi->nr_desc ; ++j) {
ttxbi = txbi + ((i + j) & (mask));
txdesc[(i + j) & (mask)].dw[0] = 0;
dma_unmap_page(&jme->pdev->dev,
ttxbi->mapping, ttxbi->len,
DMA_TO_DEVICE);
ttxbi->mapping = 0;
ttxbi->len = 0;
}
dev_kfree_skb(ctxbi->skb);
cnt += ctxbi->nr_desc;
if (unlikely(err)) {
++(NET_STAT(jme).tx_carrier_errors);
} else {
++(NET_STAT(jme).tx_packets);
NET_STAT(jme).tx_bytes += ctxbi->len;
}
ctxbi->skb = NULL;
ctxbi->len = 0;
ctxbi->start_xmit = 0;
} else {
break;
}
i = (i + ctxbi->nr_desc) & mask;
ctxbi->nr_desc = 0;
}
tx_dbg(jme, "txclean: done %d@%lu\n", i, jiffies);
atomic_set(&txring->next_to_clean, i);
atomic_add(cnt, &txring->nr_free);
jme_wake_queue_if_stopped(jme);
out:
atomic_inc(&jme->tx_cleaning);
}
static void
jme_intr_msi(struct jme_adapter *jme, u32 intrstat)
{
/*
* Disable interrupt
*/
jwrite32f(jme, JME_IENC, INTR_ENABLE);
if (intrstat & (INTR_LINKCH | INTR_SWINTR)) {
/*
* Link change event is critical
* all other events are ignored
*/
jwrite32(jme, JME_IEVE, intrstat);
schedule_work(&jme->linkch_task);
goto out_reenable;
}
if (intrstat & INTR_TMINTR) {
jwrite32(jme, JME_IEVE, INTR_TMINTR);
tasklet_schedule(&jme->pcc_task);
}
if (intrstat & (INTR_PCCTXTO | INTR_PCCTX)) {
jwrite32(jme, JME_IEVE, INTR_PCCTXTO | INTR_PCCTX | INTR_TX0);
tasklet_schedule(&jme->txclean_task);
}
if ((intrstat & (INTR_PCCRX0TO | INTR_PCCRX0 | INTR_RX0EMP))) {
jwrite32(jme, JME_IEVE, (intrstat & (INTR_PCCRX0TO |
INTR_PCCRX0 |
INTR_RX0EMP)) |
INTR_RX0);
}
if (test_bit(JME_FLAG_POLL, &jme->flags)) {
if (intrstat & INTR_RX0EMP)
atomic_inc(&jme->rx_empty);
if ((intrstat & (INTR_PCCRX0TO | INTR_PCCRX0 | INTR_RX0EMP))) {
if (likely(JME_RX_SCHEDULE_PREP(jme))) {
jme_polling_mode(jme);
JME_RX_SCHEDULE(jme);
}
}
} else {
if (intrstat & INTR_RX0EMP) {
atomic_inc(&jme->rx_empty);
tasklet_hi_schedule(&jme->rxempty_task);
} else if (intrstat & (INTR_PCCRX0TO | INTR_PCCRX0)) {
tasklet_hi_schedule(&jme->rxclean_task);
}
}
out_reenable:
/*
* Re-enable interrupt
*/
jwrite32f(jme, JME_IENS, INTR_ENABLE);
}
static irqreturn_t
jme_intr(int irq, void *dev_id)
{
struct net_device *netdev = dev_id;
struct jme_adapter *jme = netdev_priv(netdev);
u32 intrstat;
intrstat = jread32(jme, JME_IEVE);
/*
* Check if it's really an interrupt for us
*/
if (unlikely((intrstat & INTR_ENABLE) == 0))
return IRQ_NONE;
/*
* Check if the device still exist
*/
if (unlikely(intrstat == ~((typeof(intrstat))0)))
return IRQ_NONE;
jme_intr_msi(jme, intrstat);
return IRQ_HANDLED;
}
static irqreturn_t
jme_msi(int irq, void *dev_id)
{
struct net_device *netdev = dev_id;
struct jme_adapter *jme = netdev_priv(netdev);
u32 intrstat;
intrstat = jread32(jme, JME_IEVE);
jme_intr_msi(jme, intrstat);
return IRQ_HANDLED;
}
static void
jme_reset_link(struct jme_adapter *jme)
{
jwrite32(jme, JME_TMCSR, TMCSR_SWIT);
}
static void
jme_restart_an(struct jme_adapter *jme)
{
u32 bmcr;
spin_lock_bh(&jme->phy_lock);
bmcr = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_BMCR);
bmcr |= (BMCR_ANENABLE | BMCR_ANRESTART);
jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_BMCR, bmcr);
spin_unlock_bh(&jme->phy_lock);
}
static int
jme_request_irq(struct jme_adapter *jme)
{
int rc;
struct net_device *netdev = jme->dev;
irq_handler_t handler = jme_intr;
int irq_flags = IRQF_SHARED;
if (!pci_enable_msi(jme->pdev)) {
set_bit(JME_FLAG_MSI, &jme->flags);
handler = jme_msi;
irq_flags = 0;
}
rc = request_irq(jme->pdev->irq, handler, irq_flags, netdev->name,
netdev);
if (rc) {
netdev_err(netdev,
"Unable to request %s interrupt (return: %d)\n",
test_bit(JME_FLAG_MSI, &jme->flags) ? "MSI" : "INTx",
rc);
if (test_bit(JME_FLAG_MSI, &jme->flags)) {
pci_disable_msi(jme->pdev);
clear_bit(JME_FLAG_MSI, &jme->flags);
}
} else {
netdev->irq = jme->pdev->irq;
}
return rc;
}
static void
jme_free_irq(struct jme_adapter *jme)
{
free_irq(jme->pdev->irq, jme->dev);
if (test_bit(JME_FLAG_MSI, &jme->flags)) {
pci_disable_msi(jme->pdev);
clear_bit(JME_FLAG_MSI, &jme->flags);
jme->dev->irq = jme->pdev->irq;
}
}
static inline void
jme_new_phy_on(struct jme_adapter *jme)
{
u32 reg;
reg = jread32(jme, JME_PHY_PWR);
reg &= ~(PHY_PWR_DWN1SEL | PHY_PWR_DWN1SW |
PHY_PWR_DWN2 | PHY_PWR_CLKSEL);
jwrite32(jme, JME_PHY_PWR, reg);
pci_read_config_dword(jme->pdev, PCI_PRIV_PE1, &reg);
reg &= ~PE1_GPREG0_PBG;
reg |= PE1_GPREG0_ENBG;
pci_write_config_dword(jme->pdev, PCI_PRIV_PE1, reg);
}
static inline void
jme_new_phy_off(struct jme_adapter *jme)
{
u32 reg;
reg = jread32(jme, JME_PHY_PWR);
reg |= PHY_PWR_DWN1SEL | PHY_PWR_DWN1SW |
PHY_PWR_DWN2 | PHY_PWR_CLKSEL;
jwrite32(jme, JME_PHY_PWR, reg);
pci_read_config_dword(jme->pdev, PCI_PRIV_PE1, &reg);
reg &= ~PE1_GPREG0_PBG;
reg |= PE1_GPREG0_PDD3COLD;
pci_write_config_dword(jme->pdev, PCI_PRIV_PE1, reg);
}
static inline void
jme_phy_on(struct jme_adapter *jme)
{
u32 bmcr;
bmcr = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_BMCR);
bmcr &= ~BMCR_PDOWN;
jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_BMCR, bmcr);
if (new_phy_power_ctrl(jme->chip_main_rev))
jme_new_phy_on(jme);
}
static inline void
jme_phy_off(struct jme_adapter *jme)
{
u32 bmcr;
bmcr = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_BMCR);
bmcr |= BMCR_PDOWN;
jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_BMCR, bmcr);
if (new_phy_power_ctrl(jme->chip_main_rev))
jme_new_phy_off(jme);
}
static int
jme_phy_specreg_read(struct jme_adapter *jme, u32 specreg)
{
u32 phy_addr;
phy_addr = JM_PHY_SPEC_REG_READ | specreg;
jme_mdio_write(jme->dev, jme->mii_if.phy_id, JM_PHY_SPEC_ADDR_REG,
phy_addr);
return jme_mdio_read(jme->dev, jme->mii_if.phy_id,
JM_PHY_SPEC_DATA_REG);
}
static void
jme_phy_specreg_write(struct jme_adapter *jme, u32 ext_reg, u32 phy_data)
{
u32 phy_addr;
phy_addr = JM_PHY_SPEC_REG_WRITE | ext_reg;
jme_mdio_write(jme->dev, jme->mii_if.phy_id, JM_PHY_SPEC_DATA_REG,
phy_data);
jme_mdio_write(jme->dev, jme->mii_if.phy_id, JM_PHY_SPEC_ADDR_REG,
phy_addr);
}
static int
jme_phy_calibration(struct jme_adapter *jme)
{
u32 ctrl1000, phy_data;
jme_phy_off(jme);
jme_phy_on(jme);
/* Enabel PHY test mode 1 */
ctrl1000 = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_CTRL1000);
ctrl1000 &= ~PHY_GAD_TEST_MODE_MSK;
ctrl1000 |= PHY_GAD_TEST_MODE_1;
jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_CTRL1000, ctrl1000);
phy_data = jme_phy_specreg_read(jme, JM_PHY_EXT_COMM_2_REG);
phy_data &= ~JM_PHY_EXT_COMM_2_CALI_MODE_0;
phy_data |= JM_PHY_EXT_COMM_2_CALI_LATCH |
JM_PHY_EXT_COMM_2_CALI_ENABLE;
jme_phy_specreg_write(jme, JM_PHY_EXT_COMM_2_REG, phy_data);
msleep(20);
phy_data = jme_phy_specreg_read(jme, JM_PHY_EXT_COMM_2_REG);
phy_data &= ~(JM_PHY_EXT_COMM_2_CALI_ENABLE |
JM_PHY_EXT_COMM_2_CALI_MODE_0 |
JM_PHY_EXT_COMM_2_CALI_LATCH);
jme_phy_specreg_write(jme, JM_PHY_EXT_COMM_2_REG, phy_data);
/* Disable PHY test mode */
ctrl1000 = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_CTRL1000);
ctrl1000 &= ~PHY_GAD_TEST_MODE_MSK;
jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_CTRL1000, ctrl1000);
return 0;
}
static int
jme_phy_setEA(struct jme_adapter *jme)
{
u32 phy_comm0 = 0, phy_comm1 = 0;
u8 nic_ctrl;
pci_read_config_byte(jme->pdev, PCI_PRIV_SHARE_NICCTRL, &nic_ctrl);
if ((nic_ctrl & 0x3) == JME_FLAG_PHYEA_ENABLE)
return 0;
switch (jme->pdev->device) {
case PCI_DEVICE_ID_JMICRON_JMC250:
if (((jme->chip_main_rev == 5) &&
((jme->chip_sub_rev == 0) || (jme->chip_sub_rev == 1) ||
(jme->chip_sub_rev == 3))) ||
(jme->chip_main_rev >= 6)) {
phy_comm0 = 0x008A;
phy_comm1 = 0x4109;
}
if ((jme->chip_main_rev == 3) &&
((jme->chip_sub_rev == 1) || (jme->chip_sub_rev == 2)))
phy_comm0 = 0xE088;
break;
case PCI_DEVICE_ID_JMICRON_JMC260:
if (((jme->chip_main_rev == 5) &&
((jme->chip_sub_rev == 0) || (jme->chip_sub_rev == 1) ||
(jme->chip_sub_rev == 3))) ||
(jme->chip_main_rev >= 6)) {
phy_comm0 = 0x008A;
phy_comm1 = 0x4109;
}
if ((jme->chip_main_rev == 3) &&
((jme->chip_sub_rev == 1) || (jme->chip_sub_rev == 2)))
phy_comm0 = 0xE088;
if ((jme->chip_main_rev == 2) && (jme->chip_sub_rev == 0))
phy_comm0 = 0x608A;
if ((jme->chip_main_rev == 2) && (jme->chip_sub_rev == 2))
phy_comm0 = 0x408A;
break;
default:
return -ENODEV;
}
if (phy_comm0)
jme_phy_specreg_write(jme, JM_PHY_EXT_COMM_0_REG, phy_comm0);
if (phy_comm1)
jme_phy_specreg_write(jme, JM_PHY_EXT_COMM_1_REG, phy_comm1);
return 0;
}
static int
jme_open(struct net_device *netdev)
{
struct jme_adapter *jme = netdev_priv(netdev);
int rc;
jme_clear_pm_disable_wol(jme);
JME_NAPI_ENABLE(jme);
tasklet_setup(&jme->txclean_task, jme_tx_clean_tasklet);
tasklet_setup(&jme->rxclean_task, jme_rx_clean_tasklet);
tasklet_setup(&jme->rxempty_task, jme_rx_empty_tasklet);
rc = jme_request_irq(jme);
if (rc)
goto err_out;
jme_start_irq(jme);
jme_phy_on(jme);
if (test_bit(JME_FLAG_SSET, &jme->flags))
jme_set_link_ksettings(netdev, &jme->old_cmd);
else
jme_reset_phy_processor(jme);
jme_phy_calibration(jme);
jme_phy_setEA(jme);
jme_reset_link(jme);
return 0;
err_out:
netif_stop_queue(netdev);
netif_carrier_off(netdev);
return rc;
}
static void
jme_set_100m_half(struct jme_adapter *jme)
{
u32 bmcr, tmp;
jme_phy_on(jme);
bmcr = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_BMCR);
tmp = bmcr & ~(BMCR_ANENABLE | BMCR_SPEED100 |
BMCR_SPEED1000 | BMCR_FULLDPLX);
tmp |= BMCR_SPEED100;
if (bmcr != tmp)
jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_BMCR, tmp);
if (jme->fpgaver)
jwrite32(jme, JME_GHC, GHC_SPEED_100M | GHC_LINK_POLL);
else
jwrite32(jme, JME_GHC, GHC_SPEED_100M);
}
#define JME_WAIT_LINK_TIME 2000 /* 2000ms */
static void
jme_wait_link(struct jme_adapter *jme)
{
u32 phylink, to = JME_WAIT_LINK_TIME;
msleep(1000);
phylink = jme_linkstat_from_phy(jme);
while (!(phylink & PHY_LINK_UP) && (to -= 10) > 0) {
usleep_range(10000, 11000);
phylink = jme_linkstat_from_phy(jme);
}
}
static void
jme_powersave_phy(struct jme_adapter *jme)
{
if (jme->reg_pmcs && device_may_wakeup(&jme->pdev->dev)) {
jme_set_100m_half(jme);
if (jme->reg_pmcs & (PMCS_LFEN | PMCS_LREN))
jme_wait_link(jme);
jme_clear_pm_enable_wol(jme);
} else {
jme_phy_off(jme);
}
}
static int
jme_close(struct net_device *netdev)
{
struct jme_adapter *jme = netdev_priv(netdev);
netif_stop_queue(netdev);
netif_carrier_off(netdev);
jme_stop_irq(jme);
jme_free_irq(jme);
JME_NAPI_DISABLE(jme);
cancel_work_sync(&jme->linkch_task);
tasklet_kill(&jme->txclean_task);
tasklet_kill(&jme->rxclean_task);
tasklet_kill(&jme->rxempty_task);
jme_disable_rx_engine(jme);
jme_disable_tx_engine(jme);
jme_reset_mac_processor(jme);
jme_free_rx_resources(jme);
jme_free_tx_resources(jme);
jme->phylink = 0;
jme_phy_off(jme);
return 0;
}
static int
jme_alloc_txdesc(struct jme_adapter *jme,
struct sk_buff *skb)
{
struct jme_ring *txring = &(jme->txring[0]);
int idx, nr_alloc, mask = jme->tx_ring_mask;
idx = txring->next_to_use;
nr_alloc = skb_shinfo(skb)->nr_frags + 2;
if (unlikely(atomic_read(&txring->nr_free) < nr_alloc))
return -1;
atomic_sub(nr_alloc, &txring->nr_free);
txring->next_to_use = (txring->next_to_use + nr_alloc) & mask;
return idx;
}
static int
jme_fill_tx_map(struct pci_dev *pdev,
struct txdesc *txdesc,
struct jme_buffer_info *txbi,
struct page *page,
u32 page_offset,
u32 len,
bool hidma)
{
dma_addr_t dmaaddr;
dmaaddr = dma_map_page(&pdev->dev, page, page_offset, len,
DMA_TO_DEVICE);
if (unlikely(dma_mapping_error(&pdev->dev, dmaaddr)))
return -EINVAL;
dma_sync_single_for_device(&pdev->dev, dmaaddr, len, DMA_TO_DEVICE);
txdesc->dw[0] = 0;
txdesc->dw[1] = 0;
txdesc->desc2.flags = TXFLAG_OWN;
txdesc->desc2.flags |= (hidma) ? TXFLAG_64BIT : 0;
txdesc->desc2.datalen = cpu_to_le16(len);
txdesc->desc2.bufaddrh = cpu_to_le32((__u64)dmaaddr >> 32);
txdesc->desc2.bufaddrl = cpu_to_le32(
(__u64)dmaaddr & 0xFFFFFFFFUL);
txbi->mapping = dmaaddr;
txbi->len = len;
return 0;
}
static void jme_drop_tx_map(struct jme_adapter *jme, int startidx, int count)
{
struct jme_ring *txring = &(jme->txring[0]);
struct jme_buffer_info *txbi = txring->bufinf, *ctxbi;
int mask = jme->tx_ring_mask;
int j;
for (j = 0 ; j < count ; j++) {
ctxbi = txbi + ((startidx + j + 2) & (mask));
dma_unmap_page(&jme->pdev->dev, ctxbi->mapping, ctxbi->len,
DMA_TO_DEVICE);
ctxbi->mapping = 0;
ctxbi->len = 0;
}
}
static int
jme_map_tx_skb(struct jme_adapter *jme, struct sk_buff *skb, int idx)
{
struct jme_ring *txring = &(jme->txring[0]);
struct txdesc *txdesc = txring->desc, *ctxdesc;
struct jme_buffer_info *txbi = txring->bufinf, *ctxbi;
bool hidma = jme->dev->features & NETIF_F_HIGHDMA;
int i, nr_frags = skb_shinfo(skb)->nr_frags;
int mask = jme->tx_ring_mask;
u32 len;
int ret = 0;
for (i = 0 ; i < nr_frags ; ++i) {
const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
ctxdesc = txdesc + ((idx + i + 2) & (mask));
ctxbi = txbi + ((idx + i + 2) & (mask));
ret = jme_fill_tx_map(jme->pdev, ctxdesc, ctxbi,
skb_frag_page(frag), skb_frag_off(frag),
skb_frag_size(frag), hidma);
if (ret) {
jme_drop_tx_map(jme, idx, i);
goto out;
}
}
len = skb_is_nonlinear(skb) ? skb_headlen(skb) : skb->len;
ctxdesc = txdesc + ((idx + 1) & (mask));
ctxbi = txbi + ((idx + 1) & (mask));
ret = jme_fill_tx_map(jme->pdev, ctxdesc, ctxbi, virt_to_page(skb->data),
offset_in_page(skb->data), len, hidma);
if (ret)
jme_drop_tx_map(jme, idx, i);
out:
return ret;
}
static int
jme_tx_tso(struct sk_buff *skb, __le16 *mss, u8 *flags)
{
*mss = cpu_to_le16(skb_shinfo(skb)->gso_size << TXDESC_MSS_SHIFT);
if (*mss) {
*flags |= TXFLAG_LSEN;
if (skb->protocol == htons(ETH_P_IP)) {
struct iphdr *iph = ip_hdr(skb);
iph->check = 0;
tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
iph->daddr, 0,
IPPROTO_TCP,
0);
} else {
tcp_v6_gso_csum_prep(skb);
}
return 0;
}
return 1;
}
static void
jme_tx_csum(struct jme_adapter *jme, struct sk_buff *skb, u8 *flags)
{
if (skb->ip_summed == CHECKSUM_PARTIAL) {
u8 ip_proto;
switch (skb->protocol) {
case htons(ETH_P_IP):
ip_proto = ip_hdr(skb)->protocol;
break;
case htons(ETH_P_IPV6):
ip_proto = ipv6_hdr(skb)->nexthdr;
break;
default:
ip_proto = 0;
break;
}
switch (ip_proto) {
case IPPROTO_TCP:
*flags |= TXFLAG_TCPCS;
break;
case IPPROTO_UDP:
*flags |= TXFLAG_UDPCS;
break;
default:
netif_err(jme, tx_err, jme->dev, "Error upper layer protocol\n");
break;
}
}
}
static inline void
jme_tx_vlan(struct sk_buff *skb, __le16 *vlan, u8 *flags)
{
if (skb_vlan_tag_present(skb)) {
*flags |= TXFLAG_TAGON;
*vlan = cpu_to_le16(skb_vlan_tag_get(skb));
}
}
static int
jme_fill_tx_desc(struct jme_adapter *jme, struct sk_buff *skb, int idx)
{
struct jme_ring *txring = &(jme->txring[0]);
struct txdesc *txdesc;
struct jme_buffer_info *txbi;
u8 flags;
int ret = 0;
txdesc = (struct txdesc *)txring->desc + idx;
txbi = txring->bufinf + idx;
txdesc->dw[0] = 0;
txdesc->dw[1] = 0;
txdesc->dw[2] = 0;
txdesc->dw[3] = 0;
txdesc->desc1.pktsize = cpu_to_le16(skb->len);
/*
* Set OWN bit at final.
* When kernel transmit faster than NIC.
* And NIC trying to send this descriptor before we tell
* it to start sending this TX queue.
* Other fields are already filled correctly.
*/
wmb();
flags = TXFLAG_OWN | TXFLAG_INT;
/*
* Set checksum flags while not tso
*/
if (jme_tx_tso(skb, &txdesc->desc1.mss, &flags))
jme_tx_csum(jme, skb, &flags);
jme_tx_vlan(skb, &txdesc->desc1.vlan, &flags);
ret = jme_map_tx_skb(jme, skb, idx);
if (ret)
return ret;
txdesc->desc1.flags = flags;
/*
* Set tx buffer info after telling NIC to send
* For better tx_clean timing
*/
wmb();
txbi->nr_desc = skb_shinfo(skb)->nr_frags + 2;
txbi->skb = skb;
txbi->len = skb->len;
txbi->start_xmit = jiffies;
if (!txbi->start_xmit)
txbi->start_xmit = (0UL-1);
return 0;
}
static void
jme_stop_queue_if_full(struct jme_adapter *jme)
{
struct jme_ring *txring = &(jme->txring[0]);
struct jme_buffer_info *txbi = txring->bufinf;
int idx = atomic_read(&txring->next_to_clean);
txbi += idx;
smp_wmb();
if (unlikely(atomic_read(&txring->nr_free) < (MAX_SKB_FRAGS+2))) {
netif_stop_queue(jme->dev);
netif_info(jme, tx_queued, jme->dev, "TX Queue Paused\n");
smp_wmb();
if (atomic_read(&txring->nr_free)
>= (jme->tx_wake_threshold)) {
netif_wake_queue(jme->dev);
netif_info(jme, tx_queued, jme->dev, "TX Queue Fast Waked\n");
}
}
if (unlikely(txbi->start_xmit &&
time_is_before_eq_jiffies(txbi->start_xmit + TX_TIMEOUT) &&
txbi->skb)) {
netif_stop_queue(jme->dev);
netif_info(jme, tx_queued, jme->dev,
"TX Queue Stopped %d@%lu\n", idx, jiffies);
}
}
/*
* This function is already protected by netif_tx_lock()
*/
static netdev_tx_t
jme_start_xmit(struct sk_buff *skb, struct net_device *netdev)
{
struct jme_adapter *jme = netdev_priv(netdev);
int idx;
if (unlikely(skb_is_gso(skb) && skb_cow_head(skb, 0))) {
dev_kfree_skb_any(skb);
++(NET_STAT(jme).tx_dropped);
return NETDEV_TX_OK;
}
idx = jme_alloc_txdesc(jme, skb);
if (unlikely(idx < 0)) {
netif_stop_queue(netdev);
netif_err(jme, tx_err, jme->dev,
"BUG! Tx ring full when queue awake!\n");
return NETDEV_TX_BUSY;
}
if (jme_fill_tx_desc(jme, skb, idx))
return NETDEV_TX_OK;
jwrite32(jme, JME_TXCS, jme->reg_txcs |
TXCS_SELECT_QUEUE0 |
TXCS_QUEUE0S |
TXCS_ENABLE);
tx_dbg(jme, "xmit: %d+%d@%lu\n",
idx, skb_shinfo(skb)->nr_frags + 2, jiffies);
jme_stop_queue_if_full(jme);
return NETDEV_TX_OK;
}
static void
jme_set_unicastaddr(struct net_device *netdev)
{
struct jme_adapter *jme = netdev_priv(netdev);
u32 val;
val = (netdev->dev_addr[3] & 0xff) << 24 |
(netdev->dev_addr[2] & 0xff) << 16 |
(netdev->dev_addr[1] & 0xff) << 8 |
(netdev->dev_addr[0] & 0xff);
jwrite32(jme, JME_RXUMA_LO, val);
val = (netdev->dev_addr[5] & 0xff) << 8 |
(netdev->dev_addr[4] & 0xff);
jwrite32(jme, JME_RXUMA_HI, val);
}
static int
jme_set_macaddr(struct net_device *netdev, void *p)
{
struct jme_adapter *jme = netdev_priv(netdev);
struct sockaddr *addr = p;
if (netif_running(netdev))
return -EBUSY;
spin_lock_bh(&jme->macaddr_lock);
eth_hw_addr_set(netdev, addr->sa_data);
jme_set_unicastaddr(netdev);
spin_unlock_bh(&jme->macaddr_lock);
return 0;
}
static void
jme_set_multi(struct net_device *netdev)
{
struct jme_adapter *jme = netdev_priv(netdev);
u32 mc_hash[2] = {};
spin_lock_bh(&jme->rxmcs_lock);
jme->reg_rxmcs |= RXMCS_BRDFRAME | RXMCS_UNIFRAME;
if (netdev->flags & IFF_PROMISC) {
jme->reg_rxmcs |= RXMCS_ALLFRAME;
} else if (netdev->flags & IFF_ALLMULTI) {
jme->reg_rxmcs |= RXMCS_ALLMULFRAME;
} else if (netdev->flags & IFF_MULTICAST) {
struct netdev_hw_addr *ha;
int bit_nr;
jme->reg_rxmcs |= RXMCS_MULFRAME | RXMCS_MULFILTERED;
netdev_for_each_mc_addr(ha, netdev) {
bit_nr = ether_crc(ETH_ALEN, ha->addr) & 0x3F;
mc_hash[bit_nr >> 5] |= 1 << (bit_nr & 0x1F);
}
jwrite32(jme, JME_RXMCHT_LO, mc_hash[0]);
jwrite32(jme, JME_RXMCHT_HI, mc_hash[1]);
}
wmb();
jwrite32(jme, JME_RXMCS, jme->reg_rxmcs);
spin_unlock_bh(&jme->rxmcs_lock);
}
static int
jme_change_mtu(struct net_device *netdev, int new_mtu)
{
struct jme_adapter *jme = netdev_priv(netdev);
WRITE_ONCE(netdev->mtu, new_mtu);
netdev_update_features(netdev);
jme_restart_rx_engine(jme);
jme_reset_link(jme);
return 0;
}
static void
jme_tx_timeout(struct net_device *netdev, unsigned int txqueue)
{
struct jme_adapter *jme = netdev_priv(netdev);
jme->phylink = 0;
jme_reset_phy_processor(jme);
if (test_bit(JME_FLAG_SSET, &jme->flags))
jme_set_link_ksettings(netdev, &jme->old_cmd);
/*
* Force to Reset the link again
*/
jme_reset_link(jme);
}
static void
jme_get_drvinfo(struct net_device *netdev,
struct ethtool_drvinfo *info)
{
struct jme_adapter *jme = netdev_priv(netdev);
strscpy(info->driver, DRV_NAME, sizeof(info->driver));
strscpy(info->version, DRV_VERSION, sizeof(info->version));
strscpy(info->bus_info, pci_name(jme->pdev), sizeof(info->bus_info));
}
static int
jme_get_regs_len(struct net_device *netdev)
{
return JME_REG_LEN;
}
static void
mmapio_memcpy(struct jme_adapter *jme, u32 *p, u32 reg, int len)
{
int i;
for (i = 0 ; i < len ; i += 4)
p[i >> 2] = jread32(jme, reg + i);
}
static void
mdio_memcpy(struct jme_adapter *jme, u32 *p, int reg_nr)
{
int i;
u16 *p16 = (u16 *)p;
for (i = 0 ; i < reg_nr ; ++i)
p16[i] = jme_mdio_read(jme->dev, jme->mii_if.phy_id, i);
}
static void
jme_get_regs(struct net_device *netdev, struct ethtool_regs *regs, void *p)
{
struct jme_adapter *jme = netdev_priv(netdev);
u32 *p32 = (u32 *)p;
memset(p, 0xFF, JME_REG_LEN);
regs->version = 1;
mmapio_memcpy(jme, p32, JME_MAC, JME_MAC_LEN);
p32 += 0x100 >> 2;
mmapio_memcpy(jme, p32, JME_PHY, JME_PHY_LEN);
p32 += 0x100 >> 2;
mmapio_memcpy(jme, p32, JME_MISC, JME_MISC_LEN);
p32 += 0x100 >> 2;
mmapio_memcpy(jme, p32, JME_RSS, JME_RSS_LEN);
p32 += 0x100 >> 2;
mdio_memcpy(jme, p32, JME_PHY_REG_NR);
}
static int jme_get_coalesce(struct net_device *netdev,
struct ethtool_coalesce *ecmd,
struct kernel_ethtool_coalesce *kernel_coal,
struct netlink_ext_ack *extack)
{
struct jme_adapter *jme = netdev_priv(netdev);
ecmd->tx_coalesce_usecs = PCC_TX_TO;
ecmd->tx_max_coalesced_frames = PCC_TX_CNT;
if (test_bit(JME_FLAG_POLL, &jme->flags)) {
ecmd->use_adaptive_rx_coalesce = false;
ecmd->rx_coalesce_usecs = 0;
ecmd->rx_max_coalesced_frames = 0;
return 0;
}
ecmd->use_adaptive_rx_coalesce = true;
switch (jme->dpi.cur) {
case PCC_P1:
ecmd->rx_coalesce_usecs = PCC_P1_TO;
ecmd->rx_max_coalesced_frames = PCC_P1_CNT;
break;
case PCC_P2:
ecmd->rx_coalesce_usecs = PCC_P2_TO;
ecmd->rx_max_coalesced_frames = PCC_P2_CNT;
break;
case PCC_P3:
ecmd->rx_coalesce_usecs = PCC_P3_TO;
ecmd->rx_max_coalesced_frames = PCC_P3_CNT;
break;
default:
break;
}
return 0;
}
static int jme_set_coalesce(struct net_device *netdev,
struct ethtool_coalesce *ecmd,
struct kernel_ethtool_coalesce *kernel_coal,
struct netlink_ext_ack *extack)
{
struct jme_adapter *jme = netdev_priv(netdev);
struct dynpcc_info *dpi = &(jme->dpi);
if (netif_running(netdev))
return -EBUSY;
if (ecmd->use_adaptive_rx_coalesce &&
test_bit(JME_FLAG_POLL, &jme->flags)) {
clear_bit(JME_FLAG_POLL, &jme->flags);
jme->jme_rx = netif_rx;
dpi->cur = PCC_P1;
dpi->attempt = PCC_P1;
dpi->cnt = 0;
jme_set_rx_pcc(jme, PCC_P1);
jme_interrupt_mode(jme);
} else if (!(ecmd->use_adaptive_rx_coalesce) &&
!(test_bit(JME_FLAG_POLL, &jme->flags))) {
set_bit(JME_FLAG_POLL, &jme->flags);
jme->jme_rx = netif_receive_skb;
jme_interrupt_mode(jme);
}
return 0;
}
static void
jme_get_pauseparam(struct net_device *netdev,
struct ethtool_pauseparam *ecmd)
{
struct jme_adapter *jme = netdev_priv(netdev);
u32 val;
ecmd->tx_pause = (jme->reg_txpfc & TXPFC_PF_EN) != 0;
ecmd->rx_pause = (jme->reg_rxmcs & RXMCS_FLOWCTRL) != 0;
spin_lock_bh(&jme->phy_lock);
val = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_ADVERTISE);
spin_unlock_bh(&jme->phy_lock);
ecmd->autoneg =
(val & (ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM)) != 0;
}
static int
jme_set_pauseparam(struct net_device *netdev,
struct ethtool_pauseparam *ecmd)
{
struct jme_adapter *jme = netdev_priv(netdev);
u32 val;
if (((jme->reg_txpfc & TXPFC_PF_EN) != 0) ^
(ecmd->tx_pause != 0)) {
if (ecmd->tx_pause)
jme->reg_txpfc |= TXPFC_PF_EN;
else
jme->reg_txpfc &= ~TXPFC_PF_EN;
jwrite32(jme, JME_TXPFC, jme->reg_txpfc);
}
spin_lock_bh(&jme->rxmcs_lock);
if (((jme->reg_rxmcs & RXMCS_FLOWCTRL) != 0) ^
(ecmd->rx_pause != 0)) {
if (ecmd->rx_pause)
jme->reg_rxmcs |= RXMCS_FLOWCTRL;
else
jme->reg_rxmcs &= ~RXMCS_FLOWCTRL;
jwrite32(jme, JME_RXMCS, jme->reg_rxmcs);
}
spin_unlock_bh(&jme->rxmcs_lock);
spin_lock_bh(&jme->phy_lock);
val = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_ADVERTISE);
if (((val & (ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM)) != 0) ^
(ecmd->autoneg != 0)) {
if (ecmd->autoneg)
val |= (ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
else
val &= ~(ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
jme_mdio_write(jme->dev, jme->mii_if.phy_id,
MII_ADVERTISE, val);
}
spin_unlock_bh(&jme->phy_lock);
return 0;
}
static void
jme_get_wol(struct net_device *netdev,
struct ethtool_wolinfo *wol)
{
struct jme_adapter *jme = netdev_priv(netdev);
wol->supported = WAKE_MAGIC | WAKE_PHY;
wol->wolopts = 0;
if (jme->reg_pmcs & (PMCS_LFEN | PMCS_LREN))
wol->wolopts |= WAKE_PHY;
if (jme->reg_pmcs & PMCS_MFEN)
wol->wolopts |= WAKE_MAGIC;
}
static int
jme_set_wol(struct net_device *netdev,
struct ethtool_wolinfo *wol)
{
struct jme_adapter *jme = netdev_priv(netdev);
if (wol->wolopts & (WAKE_MAGICSECURE |
WAKE_UCAST |
WAKE_MCAST |
WAKE_BCAST |
WAKE_ARP))
return -EOPNOTSUPP;
jme->reg_pmcs = 0;
if (wol->wolopts & WAKE_PHY)
jme->reg_pmcs |= PMCS_LFEN | PMCS_LREN;
if (wol->wolopts & WAKE_MAGIC)
jme->reg_pmcs |= PMCS_MFEN;
return 0;
}
static int
jme_get_link_ksettings(struct net_device *netdev,
struct ethtool_link_ksettings *cmd)
{
struct jme_adapter *jme = netdev_priv(netdev);
spin_lock_bh(&jme->phy_lock);
mii_ethtool_get_link_ksettings(&jme->mii_if, cmd);
spin_unlock_bh(&jme->phy_lock);
return 0;
}
static int
jme_set_link_ksettings(struct net_device *netdev,
const struct ethtool_link_ksettings *cmd)
{
struct jme_adapter *jme = netdev_priv(netdev);
int rc, fdc = 0;
if (cmd->base.speed == SPEED_1000 &&
cmd->base.autoneg != AUTONEG_ENABLE)
return -EINVAL;
/*
* Check If user changed duplex only while force_media.
* Hardware would not generate link change interrupt.
*/
if (jme->mii_if.force_media &&
cmd->base.autoneg != AUTONEG_ENABLE &&
(jme->mii_if.full_duplex != cmd->base.duplex))
fdc = 1;
spin_lock_bh(&jme->phy_lock);
rc = mii_ethtool_set_link_ksettings(&jme->mii_if, cmd);
spin_unlock_bh(&jme->phy_lock);
if (!rc) {
if (fdc)
jme_reset_link(jme);
jme->old_cmd = *cmd;
set_bit(JME_FLAG_SSET, &jme->flags);
}
return rc;
}
static int
jme_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
{
int rc;
struct jme_adapter *jme = netdev_priv(netdev);
struct mii_ioctl_data *mii_data = if_mii(rq);
unsigned int duplex_chg;
if (cmd == SIOCSMIIREG) {
u16 val = mii_data->val_in;
if (!(val & (BMCR_RESET|BMCR_ANENABLE)) &&
(val & BMCR_SPEED1000))
return -EINVAL;
}
spin_lock_bh(&jme->phy_lock);
rc = generic_mii_ioctl(&jme->mii_if, mii_data, cmd, &duplex_chg);
spin_unlock_bh(&jme->phy_lock);
if (!rc && (cmd == SIOCSMIIREG)) {
if (duplex_chg)
jme_reset_link(jme);
jme_get_link_ksettings(netdev, &jme->old_cmd);
set_bit(JME_FLAG_SSET, &jme->flags);
}
return rc;
}
static u32
jme_get_link(struct net_device *netdev)
{
struct jme_adapter *jme = netdev_priv(netdev);
return jread32(jme, JME_PHY_LINK) & PHY_LINK_UP;
}
static u32
jme_get_msglevel(struct net_device *netdev)
{
struct jme_adapter *jme = netdev_priv(netdev);
return jme->msg_enable;
}
static void
jme_set_msglevel(struct net_device *netdev, u32 value)
{
struct jme_adapter *jme = netdev_priv(netdev);
jme->msg_enable = value;
}
static netdev_features_t
jme_fix_features(struct net_device *netdev, netdev_features_t features)
{
if (netdev->mtu > 1900)
features &= ~(NETIF_F_ALL_TSO | NETIF_F_CSUM_MASK);
return features;
}
static int
jme_set_features(struct net_device *netdev, netdev_features_t features)
{
struct jme_adapter *jme = netdev_priv(netdev);
spin_lock_bh(&jme->rxmcs_lock);
if (features & NETIF_F_RXCSUM)
jme->reg_rxmcs |= RXMCS_CHECKSUM;
else
jme->reg_rxmcs &= ~RXMCS_CHECKSUM;
jwrite32(jme, JME_RXMCS, jme->reg_rxmcs);
spin_unlock_bh(&jme->rxmcs_lock);
return 0;
}
#ifdef CONFIG_NET_POLL_CONTROLLER
static void jme_netpoll(struct net_device *dev)
{
unsigned long flags;
local_irq_save(flags);
jme_intr(dev->irq, dev);
local_irq_restore(flags);
}
#endif
static int
jme_nway_reset(struct net_device *netdev)
{
struct jme_adapter *jme = netdev_priv(netdev);
jme_restart_an(jme);
return 0;
}
static u8
jme_smb_read(struct jme_adapter *jme, unsigned int addr)
{
u32 val;
int to;
val = jread32(jme, JME_SMBCSR);
to = JME_SMB_BUSY_TIMEOUT;
while ((val & SMBCSR_BUSY) && --to) {
msleep(1);
val = jread32(jme, JME_SMBCSR);
}
if (!to) {
netif_err(jme, hw, jme->dev, "SMB Bus Busy\n");
return 0xFF;
}
jwrite32(jme, JME_SMBINTF,
((addr << SMBINTF_HWADDR_SHIFT) & SMBINTF_HWADDR) |
SMBINTF_HWRWN_READ |
SMBINTF_HWCMD);
val = jread32(jme, JME_SMBINTF);
to = JME_SMB_BUSY_TIMEOUT;
while ((val & SMBINTF_HWCMD) && --to) {
msleep(1);
val = jread32(jme, JME_SMBINTF);
}
if (!to) {
netif_err(jme, hw, jme->dev, "SMB Bus Busy\n");
return 0xFF;
}
return (val & SMBINTF_HWDATR) >> SMBINTF_HWDATR_SHIFT;
}
static void
jme_smb_write(struct jme_adapter *jme, unsigned int addr, u8 data)
{
u32 val;
int to;
val = jread32(jme, JME_SMBCSR);
to = JME_SMB_BUSY_TIMEOUT;
while ((val & SMBCSR_BUSY) && --to) {
msleep(1);
val = jread32(jme, JME_SMBCSR);
}
if (!to) {
netif_err(jme, hw, jme->dev, "SMB Bus Busy\n");
return;
}
jwrite32(jme, JME_SMBINTF,
((data << SMBINTF_HWDATW_SHIFT) & SMBINTF_HWDATW) |
((addr << SMBINTF_HWADDR_SHIFT) & SMBINTF_HWADDR) |
SMBINTF_HWRWN_WRITE |
SMBINTF_HWCMD);
val = jread32(jme, JME_SMBINTF);
to = JME_SMB_BUSY_TIMEOUT;
while ((val & SMBINTF_HWCMD) && --to) {
msleep(1);
val = jread32(jme, JME_SMBINTF);
}
if (!to) {
netif_err(jme, hw, jme->dev, "SMB Bus Busy\n");
return;
}
mdelay(2);
}
static int
jme_get_eeprom_len(struct net_device *netdev)
{
struct jme_adapter *jme = netdev_priv(netdev);
u32 val;
val = jread32(jme, JME_SMBCSR);
return (val & SMBCSR_EEPROMD) ? JME_SMB_LEN : 0;
}
static int
jme_get_eeprom(struct net_device *netdev,
struct ethtool_eeprom *eeprom, u8 *data)
{
struct jme_adapter *jme = netdev_priv(netdev);
int i, offset = eeprom->offset, len = eeprom->len;
/*
* ethtool will check the boundary for us
*/
eeprom->magic = JME_EEPROM_MAGIC;
for (i = 0 ; i < len ; ++i)
data[i] = jme_smb_read(jme, i + offset);
return 0;
}
static int
jme_set_eeprom(struct net_device *netdev,
struct ethtool_eeprom *eeprom, u8 *data)
{
struct jme_adapter *jme = netdev_priv(netdev);
int i, offset = eeprom->offset, len = eeprom->len;
if (eeprom->magic != JME_EEPROM_MAGIC)
return -EINVAL;
/*
* ethtool will check the boundary for us
*/
for (i = 0 ; i < len ; ++i)
jme_smb_write(jme, i + offset, data[i]);
return 0;
}
static const struct ethtool_ops jme_ethtool_ops = {
.supported_coalesce_params = ETHTOOL_COALESCE_USECS |
ETHTOOL_COALESCE_MAX_FRAMES |
ETHTOOL_COALESCE_USE_ADAPTIVE_RX,
.get_drvinfo = jme_get_drvinfo,
.get_regs_len = jme_get_regs_len,
.get_regs = jme_get_regs,
.get_coalesce = jme_get_coalesce,
.set_coalesce = jme_set_coalesce,
.get_pauseparam = jme_get_pauseparam,
.set_pauseparam = jme_set_pauseparam,
.get_wol = jme_get_wol,
.set_wol = jme_set_wol,
.get_link = jme_get_link,
.get_msglevel = jme_get_msglevel,
.set_msglevel = jme_set_msglevel,
.nway_reset = jme_nway_reset,
.get_eeprom_len = jme_get_eeprom_len,
.get_eeprom = jme_get_eeprom,
.set_eeprom = jme_set_eeprom,
.get_link_ksettings = jme_get_link_ksettings,
.set_link_ksettings = jme_set_link_ksettings,
};
static int
jme_pci_dma64(struct pci_dev *pdev)
{
if (pdev->device == PCI_DEVICE_ID_JMICRON_JMC250 &&
!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)))
return 1;
if (pdev->device == PCI_DEVICE_ID_JMICRON_JMC250 &&
!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(40)))
return 1;
if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)))
return 0;
return -1;
}
static inline void
jme_phy_init(struct jme_adapter *jme)
{
u16 reg26;
reg26 = jme_mdio_read(jme->dev, jme->mii_if.phy_id, 26);
jme_mdio_write(jme->dev, jme->mii_if.phy_id, 26, reg26 | 0x1000);
}
static inline void
jme_check_hw_ver(struct jme_adapter *jme)
{
u32 chipmode;
chipmode = jread32(jme, JME_CHIPMODE);
jme->fpgaver = (chipmode & CM_FPGAVER_MASK) >> CM_FPGAVER_SHIFT;
jme->chiprev = (chipmode & CM_CHIPREV_MASK) >> CM_CHIPREV_SHIFT;
jme->chip_main_rev = jme->chiprev & 0xF;
jme->chip_sub_rev = (jme->chiprev >> 4) & 0xF;
}
static const struct net_device_ops jme_netdev_ops = {
.ndo_open = jme_open,
.ndo_stop = jme_close,
.ndo_validate_addr = eth_validate_addr,
.ndo_eth_ioctl = jme_ioctl,
.ndo_start_xmit = jme_start_xmit,
.ndo_set_mac_address = jme_set_macaddr,
.ndo_set_rx_mode = jme_set_multi,
.ndo_change_mtu = jme_change_mtu,
.ndo_tx_timeout = jme_tx_timeout,
.ndo_fix_features = jme_fix_features,
.ndo_set_features = jme_set_features,
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = jme_netpoll,
#endif
};
static int
jme_init_one(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
int rc = 0, using_dac, i;
struct net_device *netdev;
struct jme_adapter *jme;
u16 bmcr, bmsr;
u32 apmc;
/*
* set up PCI device basics
*/
pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 |
PCIE_LINK_STATE_CLKPM);
rc = pci_enable_device(pdev);
if (rc) {
pr_err("Cannot enable PCI device\n");
goto err_out;
}
using_dac = jme_pci_dma64(pdev);
if (using_dac < 0) {
pr_err("Cannot set PCI DMA Mask\n");
rc = -EIO;
goto err_out_disable_pdev;
}
if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
pr_err("No PCI resource region found\n");
rc = -ENOMEM;
goto err_out_disable_pdev;
}
rc = pci_request_regions(pdev, DRV_NAME);
if (rc) {
pr_err("Cannot obtain PCI resource region\n");
goto err_out_disable_pdev;
}
pci_set_master(pdev);
/*
* alloc and init net device
*/
netdev = alloc_etherdev(sizeof(*jme));
if (!netdev) {
rc = -ENOMEM;
goto err_out_release_regions;
}
netdev->netdev_ops = &jme_netdev_ops;
netdev->ethtool_ops = &jme_ethtool_ops;
netdev->watchdog_timeo = TX_TIMEOUT;
netdev->hw_features = NETIF_F_IP_CSUM |
NETIF_F_IPV6_CSUM |
NETIF_F_SG |
NETIF_F_TSO |
NETIF_F_TSO6 |
NETIF_F_RXCSUM;
netdev->features = NETIF_F_IP_CSUM |
NETIF_F_IPV6_CSUM |
NETIF_F_SG |
NETIF_F_TSO |
NETIF_F_TSO6 |
NETIF_F_HW_VLAN_CTAG_TX |
NETIF_F_HW_VLAN_CTAG_RX;
if (using_dac)
netdev->features |= NETIF_F_HIGHDMA;
/* MTU range: 1280 - 9202*/
netdev->min_mtu = IPV6_MIN_MTU;
netdev->max_mtu = MAX_ETHERNET_JUMBO_PACKET_SIZE - ETH_HLEN;
SET_NETDEV_DEV(netdev, &pdev->dev);
pci_set_drvdata(pdev, netdev);
/*
* init adapter info
*/
jme = netdev_priv(netdev);
jme->pdev = pdev;
jme->dev = netdev;
jme->jme_rx = netif_rx;
jme->old_mtu = netdev->mtu = 1500;
jme->phylink = 0;
jme->tx_ring_size = 1 << 10;
jme->tx_ring_mask = jme->tx_ring_size - 1;
jme->tx_wake_threshold = 1 << 9;
jme->rx_ring_size = 1 << 9;
jme->rx_ring_mask = jme->rx_ring_size - 1;
jme->msg_enable = JME_DEF_MSG_ENABLE;
jme->regs = ioremap(pci_resource_start(pdev, 0),
pci_resource_len(pdev, 0));
if (!(jme->regs)) {
pr_err("Mapping PCI resource region error\n");
rc = -ENOMEM;
goto err_out_free_netdev;
}
if (no_pseudohp) {
apmc = jread32(jme, JME_APMC) & ~JME_APMC_PSEUDO_HP_EN;
jwrite32(jme, JME_APMC, apmc);
} else if (force_pseudohp) {
apmc = jread32(jme, JME_APMC) | JME_APMC_PSEUDO_HP_EN;
jwrite32(jme, JME_APMC, apmc);
}
netif_napi_add(netdev, &jme->napi, jme_poll);
spin_lock_init(&jme->phy_lock);
spin_lock_init(&jme->macaddr_lock);
spin_lock_init(&jme->rxmcs_lock);
atomic_set(&jme->link_changing, 1);
atomic_set(&jme->rx_cleaning, 1);
atomic_set(&jme->tx_cleaning, 1);
atomic_set(&jme->rx_empty, 1);
tasklet_setup(&jme->pcc_task, jme_pcc_tasklet);
INIT_WORK(&jme->linkch_task, jme_link_change_work);
jme->dpi.cur = PCC_P1;
jme->reg_ghc = 0;
jme->reg_rxcs = RXCS_DEFAULT;
jme->reg_rxmcs = RXMCS_DEFAULT;
jme->reg_txpfc = 0;
jme->reg_pmcs = PMCS_MFEN;
jme->reg_gpreg1 = GPREG1_DEFAULT;
if (jme->reg_rxmcs & RXMCS_CHECKSUM)
netdev->features |= NETIF_F_RXCSUM;
/*
* Get Max Read Req Size from PCI Config Space
*/
pci_read_config_byte(pdev, PCI_DCSR_MRRS, &jme->mrrs);
jme->mrrs &= PCI_DCSR_MRRS_MASK;
switch (jme->mrrs) {
case MRRS_128B:
jme->reg_txcs = TXCS_DEFAULT | TXCS_DMASIZE_128B;
break;
case MRRS_256B:
jme->reg_txcs = TXCS_DEFAULT | TXCS_DMASIZE_256B;
break;
default:
jme->reg_txcs = TXCS_DEFAULT | TXCS_DMASIZE_512B;
break;
}
/*
* Must check before reset_mac_processor
*/
jme_check_hw_ver(jme);
jme->mii_if.dev = netdev;
if (jme->fpgaver) {
jme->mii_if.phy_id = 0;
for (i = 1 ; i < 32 ; ++i) {
bmcr = jme_mdio_read(netdev, i, MII_BMCR);
bmsr = jme_mdio_read(netdev, i, MII_BMSR);
if (bmcr != 0xFFFFU && (bmcr != 0 || bmsr != 0)) {
jme->mii_if.phy_id = i;
break;
}
}
if (!jme->mii_if.phy_id) {
rc = -EIO;
pr_err("Can not find phy_id\n");
goto err_out_unmap;
}
jme->reg_ghc |= GHC_LINK_POLL;
} else {
jme->mii_if.phy_id = 1;
}
if (pdev->device == PCI_DEVICE_ID_JMICRON_JMC250)
jme->mii_if.supports_gmii = true;
else
jme->mii_if.supports_gmii = false;
jme->mii_if.phy_id_mask = 0x1F;
jme->mii_if.reg_num_mask = 0x1F;
jme->mii_if.mdio_read = jme_mdio_read;
jme->mii_if.mdio_write = jme_mdio_write;
jme_clear_pm_disable_wol(jme);
device_init_wakeup(&pdev->dev, true);
jme_set_phyfifo_5level(jme);
jme->pcirev = pdev->revision;
if (!jme->fpgaver)
jme_phy_init(jme);
jme_phy_off(jme);
/*
* Reset MAC processor and reload EEPROM for MAC Address
*/
jme_reset_mac_processor(jme);
rc = jme_reload_eeprom(jme);
if (rc) {
pr_err("Reload eeprom for reading MAC Address error\n");
goto err_out_unmap;
}
jme_load_macaddr(netdev);
/*
* Tell stack that we are not ready to work until open()
*/
netif_carrier_off(netdev);
rc = register_netdev(netdev);
if (rc) {
pr_err("Cannot register net device\n");
goto err_out_unmap;
}
netif_info(jme, probe, jme->dev, "%s%s chiprev:%x pcirev:%x macaddr:%pM\n",
(jme->pdev->device == PCI_DEVICE_ID_JMICRON_JMC250) ?
"JMC250 Gigabit Ethernet" :
(jme->pdev->device == PCI_DEVICE_ID_JMICRON_JMC260) ?
"JMC260 Fast Ethernet" : "Unknown",
(jme->fpgaver != 0) ? " (FPGA)" : "",
(jme->fpgaver != 0) ? jme->fpgaver : jme->chiprev,
jme->pcirev, netdev->dev_addr);
return 0;
err_out_unmap:
iounmap(jme->regs);
err_out_free_netdev:
free_netdev(netdev);
err_out_release_regions:
pci_release_regions(pdev);
err_out_disable_pdev:
pci_disable_device(pdev);
err_out:
return rc;
}
static void
jme_remove_one(struct pci_dev *pdev)
{
struct net_device *netdev = pci_get_drvdata(pdev);
struct jme_adapter *jme = netdev_priv(netdev);
unregister_netdev(netdev);
iounmap(jme->regs);
free_netdev(netdev);
pci_release_regions(pdev);
pci_disable_device(pdev);
}
static void
jme_shutdown(struct pci_dev *pdev)
{
struct net_device *netdev = pci_get_drvdata(pdev);
struct jme_adapter *jme = netdev_priv(netdev);
jme_powersave_phy(jme);
pci_pme_active(pdev, true);
}
#ifdef CONFIG_PM_SLEEP
static int
jme_suspend(struct device *dev)
{
struct net_device *netdev = dev_get_drvdata(dev);
struct jme_adapter *jme = netdev_priv(netdev);
if (!netif_running(netdev))
return 0;
atomic_dec(&jme->link_changing);
netif_device_detach(netdev);
netif_stop_queue(netdev);
jme_stop_irq(jme);
tasklet_disable(&jme->txclean_task);
tasklet_disable(&jme->rxclean_task);
tasklet_disable(&jme->rxempty_task);
if (netif_carrier_ok(netdev)) {
if (test_bit(JME_FLAG_POLL, &jme->flags))
jme_polling_mode(jme);
jme_stop_pcc_timer(jme);
jme_disable_rx_engine(jme);
jme_disable_tx_engine(jme);
jme_reset_mac_processor(jme);
jme_free_rx_resources(jme);
jme_free_tx_resources(jme);
netif_carrier_off(netdev);
jme->phylink = 0;
}
tasklet_enable(&jme->txclean_task);
tasklet_enable(&jme->rxclean_task);
tasklet_enable(&jme->rxempty_task);
jme_powersave_phy(jme);
return 0;
}
static int
jme_resume(struct device *dev)
{
struct net_device *netdev = dev_get_drvdata(dev);
struct jme_adapter *jme = netdev_priv(netdev);
if (!netif_running(netdev))
return 0;
jme_clear_pm_disable_wol(jme);
jme_phy_on(jme);
if (test_bit(JME_FLAG_SSET, &jme->flags))
jme_set_link_ksettings(netdev, &jme->old_cmd);
else
jme_reset_phy_processor(jme);
jme_phy_calibration(jme);
jme_phy_setEA(jme);
netif_device_attach(netdev);
atomic_inc(&jme->link_changing);
jme_reset_link(jme);
jme_start_irq(jme);
return 0;
}
static SIMPLE_DEV_PM_OPS(jme_pm_ops, jme_suspend, jme_resume);
#define JME_PM_OPS (&jme_pm_ops)
#else
#define JME_PM_OPS NULL
#endif
static const struct pci_device_id jme_pci_tbl[] = {
{ PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMC250) },
{ PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMC260) },
{ }
};
static struct pci_driver jme_driver = {
.name = DRV_NAME,
.id_table = jme_pci_tbl,
.probe = jme_init_one,
.remove = jme_remove_one,
.shutdown = jme_shutdown,
.driver.pm = JME_PM_OPS,
};
static int __init
jme_init_module(void)
{
pr_info("JMicron JMC2XX ethernet driver version %s\n", DRV_VERSION);
return pci_register_driver(&jme_driver);
}
static void __exit
jme_cleanup_module(void)
{
pci_unregister_driver(&jme_driver);
}
module_init(jme_init_module);
module_exit(jme_cleanup_module);
MODULE_AUTHOR("Guo-Fu Tseng <cooldavid@cooldavid.org>");
MODULE_DESCRIPTION("JMicron JMC2x0 PCI Express Ethernet driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);
MODULE_DEVICE_TABLE(pci, jme_pci_tbl);
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