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drivers: net: xgene: Protect indirect MAC access

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This patch,

     - refactors mac read/write functions
     - adds lock to protect indirect mac access

Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Signed-off-by: Quan Nguyen <qnguyen@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Iyappan Subramanian 2017-05-10 13:44:59 -07:00 committed by David S. Miller
parent a95cfad947
commit ae1aed95d0
6 changed files with 71 additions and 186 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

137
drivers/net/ethernet/apm/xgene/xgene_enet_hw.c
View File

@ -270,42 +270,32 @@ static void xgene_enet_wr_mcx_csr(struct xgene_enet_pdata *pdata,
iowrite32(val, addr);
}
static bool xgene_enet_wr_indirect(void __iomem *addr, void __iomem *wr,
void __iomem *cmd, void __iomem *cmd_done,
u32 wr_addr, u32 wr_data)
{
u32 done;
u8 wait = 10;
iowrite32(wr_addr, addr);
iowrite32(wr_data, wr);
iowrite32(XGENE_ENET_WR_CMD, cmd);
/* wait for write command to complete */
while (!(done = ioread32(cmd_done)) && wait--)
udelay(1);
if (!done)
return false;
iowrite32(0, cmd);
return true;
}
static void xgene_enet_wr_mcx_mac(struct xgene_enet_pdata *pdata,
u32 wr_addr, u32 wr_data)
void xgene_enet_wr_mac(struct xgene_enet_pdata *pdata, u32 wr_addr, u32 wr_data)
{
void __iomem *addr, *wr, *cmd, *cmd_done;
struct net_device *ndev = pdata->ndev;
u8 wait = 10;
u32 done;
addr = pdata->mcx_mac_addr + MAC_ADDR_REG_OFFSET;
wr = pdata->mcx_mac_addr + MAC_WRITE_REG_OFFSET;
cmd = pdata->mcx_mac_addr + MAC_COMMAND_REG_OFFSET;
cmd_done = pdata->mcx_mac_addr + MAC_COMMAND_DONE_REG_OFFSET;
if (!xgene_enet_wr_indirect(addr, wr, cmd, cmd_done, wr_addr, wr_data))
netdev_err(pdata->ndev, "MCX mac write failed, addr: %04x\n",
wr_addr);
spin_lock(&pdata->mac_lock);
iowrite32(wr_addr, addr);
iowrite32(wr_data, wr);
iowrite32(XGENE_ENET_WR_CMD, cmd);
while (!(done = ioread32(cmd_done)) && wait--)
udelay(1);
if (!done)
netdev_err(ndev, "mac write failed, addr: %04x data: %08x\n",
wr_addr, wr_data);
iowrite32(0, cmd);
spin_unlock(&pdata->mac_lock);
}
static void xgene_enet_rd_csr(struct xgene_enet_pdata *pdata,
@ -332,42 +322,33 @@ static void xgene_enet_rd_mcx_csr(struct xgene_enet_pdata *pdata,
*val = ioread32(addr);
}
static bool xgene_enet_rd_indirect(void __iomem *addr, void __iomem *rd,
void __iomem *cmd, void __iomem *cmd_done,
u32 rd_addr, u32 *rd_data)
{
u32 done;
u8 wait = 10;
iowrite32(rd_addr, addr);
iowrite32(XGENE_ENET_RD_CMD, cmd);
/* wait for read command to complete */
while (!(done = ioread32(cmd_done)) && wait--)
udelay(1);
if (!done)
return false;
*rd_data = ioread32(rd);
iowrite32(0, cmd);
return true;
}
static void xgene_enet_rd_mcx_mac(struct xgene_enet_pdata *pdata,
u32 rd_addr, u32 *rd_data)
u32 xgene_enet_rd_mac(struct xgene_enet_pdata *pdata, u32 rd_addr)
{
void __iomem *addr, *rd, *cmd, *cmd_done;
u32 done, rd_data;
u8 wait = 10;
addr = pdata->mcx_mac_addr + MAC_ADDR_REG_OFFSET;
rd = pdata->mcx_mac_addr + MAC_READ_REG_OFFSET;
cmd = pdata->mcx_mac_addr + MAC_COMMAND_REG_OFFSET;
cmd_done = pdata->mcx_mac_addr + MAC_COMMAND_DONE_REG_OFFSET;
if (!xgene_enet_rd_indirect(addr, rd, cmd, cmd_done, rd_addr, rd_data))
netdev_err(pdata->ndev, "MCX mac read failed, addr: %04x\n",
spin_lock(&pdata->mac_lock);
iowrite32(rd_addr, addr);
iowrite32(XGENE_ENET_RD_CMD, cmd);
while (!(done = ioread32(cmd_done)) && wait--)
udelay(1);
if (!done)
netdev_err(pdata->ndev, "mac read failed, addr: %04x\n",
rd_addr);
rd_data = ioread32(rd);
iowrite32(0, cmd);
spin_unlock(&pdata->mac_lock);
return rd_data;
}
static void xgene_gmac_set_mac_addr(struct xgene_enet_pdata *pdata)
@ -379,8 +360,8 @@ static void xgene_gmac_set_mac_addr(struct xgene_enet_pdata *pdata)
(dev_addr[1] << 8) | dev_addr[0];
addr1 = (dev_addr[5] << 24) | (dev_addr[4] << 16);
xgene_enet_wr_mcx_mac(pdata, STATION_ADDR0_ADDR, addr0);
xgene_enet_wr_mcx_mac(pdata, STATION_ADDR1_ADDR, addr1);
xgene_enet_wr_mac(pdata, STATION_ADDR0_ADDR, addr0);
xgene_enet_wr_mac(pdata, STATION_ADDR1_ADDR, addr1);
}
static int xgene_enet_ecc_init(struct xgene_enet_pdata *pdata)
@ -405,8 +386,8 @@ static int xgene_enet_ecc_init(struct xgene_enet_pdata *pdata)
static void xgene_gmac_reset(struct xgene_enet_pdata *pdata)
{
xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, SOFT_RESET1);
xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, 0);
xgene_enet_wr_mac(pdata, MAC_CONFIG_1_ADDR, SOFT_RESET1);
xgene_enet_wr_mac(pdata, MAC_CONFIG_1_ADDR, 0);
}
static void xgene_enet_configure_clock(struct xgene_enet_pdata *pdata)
@ -456,8 +437,8 @@ static void xgene_gmac_set_speed(struct xgene_enet_pdata *pdata)
xgene_enet_rd_mcx_csr(pdata, ICM_CONFIG0_REG_0_ADDR, &icm0);
xgene_enet_rd_mcx_csr(pdata, ICM_CONFIG2_REG_0_ADDR, &icm2);
xgene_enet_rd_mcx_mac(pdata, MAC_CONFIG_2_ADDR, &mc2);
xgene_enet_rd_mcx_mac(pdata, INTERFACE_CONTROL_ADDR, &intf_ctl);
mc2 = xgene_enet_rd_mac(pdata, MAC_CONFIG_2_ADDR);
intf_ctl = xgene_enet_rd_mac(pdata, INTERFACE_CONTROL_ADDR);
xgene_enet_rd_csr(pdata, RGMII_REG_0_ADDR, &rgmii);
switch (pdata->phy_speed) {
@ -495,8 +476,8 @@ static void xgene_gmac_set_speed(struct xgene_enet_pdata *pdata)
}
mc2 |= FULL_DUPLEX2 | PAD_CRC | LENGTH_CHK;
xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_2_ADDR, mc2);
xgene_enet_wr_mcx_mac(pdata, INTERFACE_CONTROL_ADDR, intf_ctl);
xgene_enet_wr_mac(pdata, MAC_CONFIG_2_ADDR, mc2);
xgene_enet_wr_mac(pdata, INTERFACE_CONTROL_ADDR, intf_ctl);
xgene_enet_wr_csr(pdata, RGMII_REG_0_ADDR, rgmii);
xgene_enet_configure_clock(pdata);
@ -506,7 +487,7 @@ static void xgene_gmac_set_speed(struct xgene_enet_pdata *pdata)
static void xgene_enet_set_frame_size(struct xgene_enet_pdata *pdata, int size)
{
xgene_enet_wr_mcx_mac(pdata, MAX_FRAME_LEN_ADDR, size);
xgene_enet_wr_mac(pdata, MAX_FRAME_LEN_ADDR, size);
}
static void xgene_gmac_enable_tx_pause(struct xgene_enet_pdata *pdata,
@ -528,14 +509,14 @@ static void xgene_gmac_flowctl_tx(struct xgene_enet_pdata *pdata, bool enable)
{
u32 data;
xgene_enet_rd_mcx_mac(pdata, MAC_CONFIG_1_ADDR, &data);
data = xgene_enet_rd_mac(pdata, MAC_CONFIG_1_ADDR);
if (enable)
data |= TX_FLOW_EN;
else
data &= ~TX_FLOW_EN;
xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, data);
xgene_enet_wr_mac(pdata, MAC_CONFIG_1_ADDR, data);
pdata->mac_ops->enable_tx_pause(pdata, enable);
}
@ -544,14 +525,14 @@ static void xgene_gmac_flowctl_rx(struct xgene_enet_pdata *pdata, bool enable)
{
u32 data;
xgene_enet_rd_mcx_mac(pdata, MAC_CONFIG_1_ADDR, &data);
data = xgene_enet_rd_mac(pdata, MAC_CONFIG_1_ADDR);
if (enable)
data |= RX_FLOW_EN;
else
data &= ~RX_FLOW_EN;
xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, data);
xgene_enet_wr_mac(pdata, MAC_CONFIG_1_ADDR, data);
}
static void xgene_gmac_init(struct xgene_enet_pdata *pdata)
@ -565,9 +546,9 @@ static void xgene_gmac_init(struct xgene_enet_pdata *pdata)
xgene_gmac_set_mac_addr(pdata);
/* Adjust MDC clock frequency */
xgene_enet_rd_mcx_mac(pdata, MII_MGMT_CONFIG_ADDR, &value);
value = xgene_enet_rd_mac(pdata, MII_MGMT_CONFIG_ADDR);
MGMT_CLOCK_SEL_SET(&value, 7);
xgene_enet_wr_mcx_mac(pdata, MII_MGMT_CONFIG_ADDR, value);
xgene_enet_wr_mac(pdata, MII_MGMT_CONFIG_ADDR, value);
/* Enable drop if bufpool not available */
xgene_enet_rd_csr(pdata, RSIF_CONFIG_REG_ADDR, &value);
@ -637,32 +618,32 @@ static void xgene_gmac_rx_enable(struct xgene_enet_pdata *pdata)
{
u32 data;
xgene_enet_rd_mcx_mac(pdata, MAC_CONFIG_1_ADDR, &data);
xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, data | RX_EN);
data = xgene_enet_rd_mac(pdata, MAC_CONFIG_1_ADDR);
xgene_enet_wr_mac(pdata, MAC_CONFIG_1_ADDR, data | RX_EN);
}
static void xgene_gmac_tx_enable(struct xgene_enet_pdata *pdata)
{
u32 data;
xgene_enet_rd_mcx_mac(pdata, MAC_CONFIG_1_ADDR, &data);
xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, data | TX_EN);
data = xgene_enet_rd_mac(pdata, MAC_CONFIG_1_ADDR);
xgene_enet_wr_mac(pdata, MAC_CONFIG_1_ADDR, data | TX_EN);
}
static void xgene_gmac_rx_disable(struct xgene_enet_pdata *pdata)
{
u32 data;
xgene_enet_rd_mcx_mac(pdata, MAC_CONFIG_1_ADDR, &data);
xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, data & ~RX_EN);
data = xgene_enet_rd_mac(pdata, MAC_CONFIG_1_ADDR);
xgene_enet_wr_mac(pdata, MAC_CONFIG_1_ADDR, data & ~RX_EN);
}
static void xgene_gmac_tx_disable(struct xgene_enet_pdata *pdata)
{
u32 data;
xgene_enet_rd_mcx_mac(pdata, MAC_CONFIG_1_ADDR, &data);
xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, data & ~TX_EN);
data = xgene_enet_rd_mac(pdata, MAC_CONFIG_1_ADDR);
xgene_enet_wr_mac(pdata, MAC_CONFIG_1_ADDR, data & ~TX_EN);
}
bool xgene_ring_mgr_init(struct xgene_enet_pdata *p)

3
drivers/net/ethernet/apm/xgene/xgene_enet_hw.h
View File

@ -388,6 +388,9 @@ void xgene_enet_mdio_remove(struct xgene_enet_pdata *pdata);
bool xgene_ring_mgr_init(struct xgene_enet_pdata *p);
int xgene_enet_phy_connect(struct net_device *ndev);
void xgene_enet_phy_disconnect(struct xgene_enet_pdata *pdata);
u32 xgene_enet_rd_mac(struct xgene_enet_pdata *pdata, u32 rd_addr);
void xgene_enet_wr_mac(struct xgene_enet_pdata *pdata, u32 wr_addr,
u32 wr_data);
extern const struct xgene_mac_ops xgene_gmac_ops;
extern const struct xgene_port_ops xgene_gport_ops;

1
drivers/net/ethernet/apm/xgene/xgene_enet_main.c
View File

@ -2055,6 +2055,7 @@ static int xgene_enet_probe(struct platform_device *pdev)
goto err;
xgene_enet_setup_ops(pdata);
spin_lock_init(&pdata->mac_lock);
if (pdata->phy_mode == PHY_INTERFACE_MODE_XGMII) {
ndev->features |= NETIF_F_TSO | NETIF_F_RXCSUM;

1
drivers/net/ethernet/apm/xgene/xgene_enet_main.h
View File

@ -221,6 +221,7 @@ struct xgene_enet_pdata {
struct xgene_enet_cle cle;
struct rtnl_link_stats64 stats;
const struct xgene_mac_ops *mac_ops;
spinlock_t mac_lock; /* mac lock */
const struct xgene_port_ops *port_ops;
struct xgene_ring_ops *ring_ops;
const struct xgene_cle_ops *cle_ops;

71
drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c
View File

@ -54,41 +54,6 @@ static void xgene_enet_wr_mcx_csr(struct xgene_enet_pdata *pdata,
iowrite32(val, addr);
}
static bool xgene_enet_wr_indirect(struct xgene_indirect_ctl *ctl,
u32 wr_addr, u32 wr_data)
{
int i;
iowrite32(wr_addr, ctl->addr);
iowrite32(wr_data, ctl->ctl);
iowrite32(XGENE_ENET_WR_CMD, ctl->cmd);
/* wait for write command to complete */
for (i = 0; i < 10; i++) {
if (ioread32(ctl->cmd_done)) {
iowrite32(0, ctl->cmd);
return true;
}
udelay(1);
}
return false;
}
static void xgene_enet_wr_mac(struct xgene_enet_pdata *p,
u32 wr_addr, u32 wr_data)
{
struct xgene_indirect_ctl ctl = {
.addr = p->mcx_mac_addr + MAC_ADDR_REG_OFFSET,
.ctl = p->mcx_mac_addr + MAC_WRITE_REG_OFFSET,
.cmd = p->mcx_mac_addr + MAC_COMMAND_REG_OFFSET,
.cmd_done = p->mcx_mac_addr + MAC_COMMAND_DONE_REG_OFFSET
};
if (!xgene_enet_wr_indirect(&ctl, wr_addr, wr_data))
netdev_err(p->ndev, "mac write failed, addr: %04x\n", wr_addr);
}
static u32 xgene_enet_rd_csr(struct xgene_enet_pdata *p, u32 offset)
{
return ioread32(p->eth_csr_addr + offset);
@ -104,42 +69,6 @@ static u32 xgene_enet_rd_mcx_csr(struct xgene_enet_pdata *p, u32 offset)
return ioread32(p->mcx_mac_csr_addr + offset);
}
static u32 xgene_enet_rd_indirect(struct xgene_indirect_ctl *ctl, u32 rd_addr)
{
u32 rd_data;
int i;
iowrite32(rd_addr, ctl->addr);
iowrite32(XGENE_ENET_RD_CMD, ctl->cmd);
/* wait for read command to complete */
for (i = 0; i < 10; i++) {
if (ioread32(ctl->cmd_done)) {
rd_data = ioread32(ctl->ctl);
iowrite32(0, ctl->cmd);
return rd_data;
}
udelay(1);
}
pr_err("%s: mac read failed, addr: %04x\n", __func__, rd_addr);
return 0;
}
static u32 xgene_enet_rd_mac(struct xgene_enet_pdata *p, u32 rd_addr)
{
struct xgene_indirect_ctl ctl = {
.addr = p->mcx_mac_addr + MAC_ADDR_REG_OFFSET,
.ctl = p->mcx_mac_addr + MAC_READ_REG_OFFSET,
.cmd = p->mcx_mac_addr + MAC_COMMAND_REG_OFFSET,
.cmd_done = p->mcx_mac_addr + MAC_COMMAND_DONE_REG_OFFSET
};
return xgene_enet_rd_indirect(&ctl, rd_addr);
}
static int xgene_enet_ecc_init(struct xgene_enet_pdata *p)
{
struct net_device *ndev = p->ndev;

44
drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c
View File

@ -71,21 +71,6 @@ static bool xgene_enet_wr_indirect(void __iomem *addr, void __iomem *wr,
return true;
}
static void xgene_enet_wr_mac(struct xgene_enet_pdata *pdata,
u32 wr_addr, u32 wr_data)
{
void __iomem *addr, *wr, *cmd, *cmd_done;
addr = pdata->mcx_mac_addr + MAC_ADDR_REG_OFFSET;
wr = pdata->mcx_mac_addr + MAC_WRITE_REG_OFFSET;
cmd = pdata->mcx_mac_addr + MAC_COMMAND_REG_OFFSET;
cmd_done = pdata->mcx_mac_addr + MAC_COMMAND_DONE_REG_OFFSET;
if (!xgene_enet_wr_indirect(addr, wr, cmd, cmd_done, wr_addr, wr_data))
netdev_err(pdata->ndev, "MCX mac write failed, addr: %04x\n",
wr_addr);
}
static void xgene_enet_wr_pcs(struct xgene_enet_pdata *pdata,
u32 wr_addr, u32 wr_data)
{
@ -148,21 +133,6 @@ static bool xgene_enet_rd_indirect(void __iomem *addr, void __iomem *rd,
return true;
}
static void xgene_enet_rd_mac(struct xgene_enet_pdata *pdata,
u32 rd_addr, u32 *rd_data)
{
void __iomem *addr, *rd, *cmd, *cmd_done;
addr = pdata->mcx_mac_addr + MAC_ADDR_REG_OFFSET;
rd = pdata->mcx_mac_addr + MAC_READ_REG_OFFSET;
cmd = pdata->mcx_mac_addr + MAC_COMMAND_REG_OFFSET;
cmd_done = pdata->mcx_mac_addr + MAC_COMMAND_DONE_REG_OFFSET;
if (!xgene_enet_rd_indirect(addr, rd, cmd, cmd_done, rd_addr, rd_data))
netdev_err(pdata->ndev, "MCX mac read failed, addr: %04x\n",
rd_addr);
}
static bool xgene_enet_rd_pcs(struct xgene_enet_pdata *pdata,
u32 rd_addr, u32 *rd_data)
{
@ -300,7 +270,7 @@ static void xgene_xgmac_flowctl_tx(struct xgene_enet_pdata *pdata, bool enable)
{
u32 data;
xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1, &data);
data = xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1);
if (enable)
data |= HSTTCTLEN;
@ -316,7 +286,7 @@ static void xgene_xgmac_flowctl_rx(struct xgene_enet_pdata *pdata, bool enable)
{
u32 data;
xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1, &data);
data = xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1);
if (enable)
data |= HSTRCTLEN;
@ -332,7 +302,7 @@ static void xgene_xgmac_init(struct xgene_enet_pdata *pdata)
xgene_xgmac_reset(pdata);
xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1, &data);
data = xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1);
data |= HSTPPEN;
data &= ~HSTLENCHK;
xgene_enet_wr_mac(pdata, AXGMAC_CONFIG_1, data);
@ -379,7 +349,7 @@ static void xgene_xgmac_rx_enable(struct xgene_enet_pdata *pdata)
{
u32 data;
xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1, &data);
data = xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1);
xgene_enet_wr_mac(pdata, AXGMAC_CONFIG_1, data | HSTRFEN);
}
@ -387,7 +357,7 @@ static void xgene_xgmac_tx_enable(struct xgene_enet_pdata *pdata)
{
u32 data;
xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1, &data);
data = xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1);
xgene_enet_wr_mac(pdata, AXGMAC_CONFIG_1, data | HSTTFEN);
}
@ -395,7 +365,7 @@ static void xgene_xgmac_rx_disable(struct xgene_enet_pdata *pdata)
{
u32 data;
xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1, &data);
data = xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1);
xgene_enet_wr_mac(pdata, AXGMAC_CONFIG_1, data & ~HSTRFEN);
}
@ -403,7 +373,7 @@ static void xgene_xgmac_tx_disable(struct xgene_enet_pdata *pdata)
{
u32 data;
xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1, &data);
data = xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1);
xgene_enet_wr_mac(pdata, AXGMAC_CONFIG_1, data & ~HSTTFEN);
}