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minix3/drivers/net/lan8710a/lan8710a.c

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#include <minix/drivers.h>
#include <minix/netdriver.h>
#include <net/gen/ether.h>
#include <net/gen/eth_io.h>
#include <minix/sysutil.h>
#include <minix/board.h>
#include "assert.h"
#include "lan8710a.h"
#include "lan8710a_reg.h"
/* Local functions */
static void lan8710a_readv_s(message *m, int from_int);
static void lan8710a_writev_s(message *m, int from_int);
static void lan8710a_conf(message *m);
static void lan8710a_getstat(message *m);
static void lan8710a_init(void);
static void lan8710a_enable_interrupt(int interrupt);
static void lan8710a_interrupt(message *m);
static void lan8710a_map_regs(void);
static void lan8710a_stop(void);
static void lan8710a_dma_config_tx(u8_t desc_idx);
static void lan8710a_dma_reset_init(void);
static void lan8710a_init_addr(void);
static void lan8710a_init_desc(void);
static void lan8710a_init_mdio(void);
static int lan8710a_init_hw(void);
static void lan8710a_reset_hw();
static void lan8710a_phy_write(u32_t reg, u32_t value);
static u32_t lan8710a_phy_read(u32_t reg);
static u32_t lan8710a_reg_read(volatile u32_t *reg);
static void lan8710a_reg_write(volatile u32_t *reg, u32_t value);
static void lan8710a_reg_set(volatile u32_t *reg, u32_t value);
static void lan8710a_reg_unset(volatile u32_t *reg, u32_t value);
static void mess_reply(message *req, message *reply);
static void reply(lan8710a_t *e);
/* Local variables */
static lan8710a_t lan8710a_state;
/* SEF functions and variables. */
static void sef_local_startup(void);
static int sef_cb_init_fresh(int type, sef_init_info_t *info);
static void sef_cb_signal_handler(int signal);
/*============================================================================*
* main *
*============================================================================*/
int
main(int argc, char *argv[])
{
/* Local variables */
message m;
int r;
int ipc_status;
struct machine machine ;
sys_getmachine(&machine);
if ( BOARD_IS_BB(machine.board_id)) {
/* SEF local startup */
env_setargs(argc, argv);
sef_local_startup();
/* Main driver loop */
for (;;) {
r = netdriver_receive(ANY, &m, &ipc_status);
if (r != OK) {
panic("netdriver_receive failed: %d", r);
}
if (is_ipc_notify(ipc_status)) {
switch (_ENDPOINT_P(m.m_source)) {
case HARDWARE:
lan8710a_interrupt(&m);
break;
}
} else {
switch (m.m_type) {
case DL_WRITEV_S:
lan8710a_writev_s(&m, FALSE);
break;
case DL_READV_S:
lan8710a_readv_s(&m, FALSE);
break;
case DL_CONF:
lan8710a_conf(&m);
break;
case DL_GETSTAT_S:
lan8710a_getstat(&m);
break;
default:
panic("Illegal message: %d", m.m_type);
}
}
}
}
return EXIT_SUCCESS;
}
/*============================================================================*
* sef_local_startup *
*============================================================================*/
static void
sef_local_startup()
{
/* Register init callbacks. */
sef_setcb_init_fresh(sef_cb_init_fresh);
sef_setcb_init_lu(sef_cb_init_fresh);
sef_setcb_init_restart(sef_cb_init_fresh);
/* Register live update callbacks. */
sef_setcb_lu_prepare(sef_cb_lu_prepare_always_ready);
sef_setcb_lu_state_isvalid(sef_cb_lu_state_isvalid_workfree);
/* Register signal callbacks. */
sef_setcb_signal_handler(sef_cb_signal_handler);
/* Let SEF perform startup. */
sef_startup();
}
/*============================================================================*
* sef_cb_init_fresh *
*============================================================================*/
static int
sef_cb_init_fresh(int UNUSED( type), sef_init_info_t *UNUSED( info))
{
/* Initialize the ethernet driver. */
long v = 0;
/* Clear state. */
memset(&lan8710a_state, 0, sizeof(lan8710a_state));
/* Initialize driver. */
lan8710a_init();
/* Get instance of ethernet device */
env_parse("instance", "d", 0, &v, 0, 255);
lan8710a_state.instance = (int) v;
/* Announce we are up! */
netdriver_announce();
return OK;
}
/*============================================================================*
* sef_cb_signal_handler *
*============================================================================*/
static void
sef_cb_signal_handler(int signal)
{
/* Only check for termination signal, ignore anything else. */
if (signal != SIGTERM)
return;
lan8710a_stop();
}
/*============================================================================*
* lan8710a_enable_interrupt *
*============================================================================*/
static void
lan8710a_enable_interrupt(interrupt)
u8_t interrupt;
{
int r;
if (interrupt & RX_INT) {
if ((r = sys_irqenable(&lan8710a_state.irq_rx_hook)) != OK) {
panic("sys_irqenable failed: %d", r);
}
}
if (interrupt & TX_INT) {
if ((r = sys_irqenable(&lan8710a_state.irq_tx_hook)) != OK) {
panic("sys_irqenable failed: %d", r);
}
}
}
/*============================================================================*
* lan8710a_interrupt *
*============================================================================*/
static void
lan8710a_interrupt(m)
message *m;
{
lan8710a_t *e = &lan8710a_state;
u32_t dma_status;
/* Check the card for interrupt reason(s). */
u32_t rx_stat = lan8710a_reg_read(CPSW_WR_C0_RX_STAT);
u32_t tx_stat = lan8710a_reg_read(CPSW_WR_C0_TX_STAT);
u32_t cp;
/* Handle interrupts. */
if (rx_stat) {
cp = lan8710a_reg_read(CPDMA_STRAM_RX_CP(0));
lan8710a_readv_s(&(e->rx_message), TRUE);
lan8710a_reg_write(CPDMA_STRAM_RX_CP(0), cp);
lan8710a_reg_write(CPDMA_EOI_VECTOR, RX_INT);
}
if (tx_stat) {
cp = lan8710a_reg_read(CPDMA_STRAM_TX_CP(0));
/* Disabling channels, where Tx interrupt occurred */
lan8710a_reg_set(CPDMA_TX_INTMASK_CLEAR, tx_stat);
lan8710a_writev_s(&(e->tx_message), TRUE);
lan8710a_reg_write(CPDMA_STRAM_TX_CP(0), cp);
lan8710a_reg_write(CPDMA_EOI_VECTOR, TX_INT);
}
dma_status = lan8710a_reg_read(CPDMA_STATUS);
if (dma_status & CPDMA_ERROR) {
LAN8710A_DEBUG_PRINT(("CPDMA error: 0x%X, reset", dma_status));
lan8710a_dma_reset_init();
}
/* Re-enable Rx interrupt. */
if(m->m_notify.interrupts & (1 << RX_INT))
lan8710a_enable_interrupt(RX_INT);
/* Re-enable Tx interrupt. */
if(m->m_notify.interrupts & (1 << TX_INT))
lan8710a_enable_interrupt(TX_INT);
}
/*============================================================================*
* lan8710a_conf *
*============================================================================*/
static void
lan8710a_conf(m)
message *m;
{
message reply;
if (!(lan8710a_state.status & LAN8710A_ENABLED) &&
!(lan8710a_init_hw())) {
reply.m_type = DL_CONF_REPLY;
reply.m_netdrv_net_dl_conf.stat = ENXIO;
mess_reply(m, &reply);
return;
}
/* Reply back to INET. */
reply.m_type = DL_CONF_REPLY;
reply.m_netdrv_net_dl_conf.stat = OK;
memcpy(reply.m_netdrv_net_dl_conf.hw_addr,
lan8710a_state.address.ea_addr,
sizeof(reply.m_netdrv_net_dl_conf.hw_addr));
mess_reply(m, &reply);
}
/*============================================================================*
* lan8710a_init *
*============================================================================*/
static void
lan8710a_init(void)
{
lan8710a_map_regs();
strlcpy(lan8710a_state.name, "lan8710a#0", LAN8710A_NAME_LEN);
lan8710a_state.name[9] += lan8710a_state.instance;
lan8710a_state.status |= LAN8710A_DETECTED;
if (!(lan8710a_state.status & LAN8710A_ENABLED) &&
!(lan8710a_init_hw())) {
return;
}
}
/*============================================================================*
* lan8710a_init_addr *
*============================================================================*/
static void
lan8710a_init_addr(void)
{
static char eakey[]= LAN8710A_ENVVAR "#_EA";
static char eafmt[]= "x:x:x:x:x:x";
int i;
long v;
/*
* Do we have a user defined ethernet address?
*/
eakey[sizeof(LAN8710A_ENVVAR)-1] = '0' + lan8710a_state.instance;
for (i= 0; i < 6; i++) {
if (env_parse(eakey, eafmt, i, &v, 0x00L, 0xFFL) != EP_SET)
break;
else
lan8710a_state.address.ea_addr[i] = v;
}
if (i != 6) {
lan8710a_state.address.ea_addr[0] =
(lan8710a_reg_read(CTRL_MAC_ID0_HI) & 0xFF);
lan8710a_state.address.ea_addr[1] =
((lan8710a_reg_read(CTRL_MAC_ID0_HI) & 0xFF00) >> 8);
lan8710a_state.address.ea_addr[2] =
((lan8710a_reg_read(CTRL_MAC_ID0_HI) & 0xFF0000) >> 16);
lan8710a_state.address.ea_addr[3] =
((lan8710a_reg_read(CTRL_MAC_ID0_HI) & 0xFF000000) >> 24);
lan8710a_state.address.ea_addr[4] =
(lan8710a_reg_read(CTRL_MAC_ID0_LO) & 0xFF);
lan8710a_state.address.ea_addr[5] =
((lan8710a_reg_read(CTRL_MAC_ID0_LO) & 0xFF00) >> 8);
}
}
/*============================================================================*
* lan8710a_map_regs *
*============================================================================*/
static void
lan8710a_map_regs(void)
{
struct minix_mem_range mr;
mr.mr_base = CM_PER_BASE_ADR;
mr.mr_limit = CM_PER_BASE_ADR + MEMORY_LIMIT;
if (sys_privctl(SELF, SYS_PRIV_ADD_MEM, &mr) != 0) {
panic("Unable to request permission to map memory");
}
lan8710a_state.regs_cp_per =
(vir_bytes)vm_map_phys(SELF, (void *)CM_PER_BASE_ADR, 512);
if ((void *)lan8710a_state.regs_cp_per == MAP_FAILED) {
panic("lan8710a_state.regs_cp_per: vm_map_phys failed");
}
lan8710a_state.regs_cpdma_stram =
(vir_bytes)vm_map_phys(SELF, (void *)CPDMA_STRAM_BASE_ADR, 512);
if ((void *)lan8710a_state.regs_cpdma_stram == MAP_FAILED) {
panic("lan8710a_state.regs_cpdma_stram: vm_map_phys failed");
}
lan8710a_state.regs_cpsw_cpdma =
(vir_bytes)vm_map_phys(SELF, (void *)CPSW_CPDMA_BASE_ADR, 512);
if ((void *)lan8710a_state.regs_cpsw_cpdma == MAP_FAILED) {
panic("lan8710a_state.regs_cpsw_cpdma: vm_map_phys failed");
}
lan8710a_state.regs_cpsw_ale =
(vir_bytes)vm_map_phys(SELF, (void *)CPSW_ALE_BASE_ADR, 256);
if ((void *)lan8710a_state.regs_cpsw_ale == MAP_FAILED) {
panic("lan8710a_state.regs_cpsw_ale: vm_map_phys failed");
}
lan8710a_state.regs_cpsw_sl =
(vir_bytes)vm_map_phys(SELF, (void *)CPSW_SL_BASE_ADR, 512);
if ((void *)lan8710a_state.regs_cpsw_sl == MAP_FAILED) {
panic("lan8710a_state.regs_cpsw_sl: vm_map_phys failed");
}
lan8710a_state.regs_cpsw_ss =
(vir_bytes)vm_map_phys(SELF, (void *)CPSW_SS_BASE_ADR, 512);
if ((void *)lan8710a_state.regs_cpsw_ss == MAP_FAILED) {
panic("lan8710a_state.regs_cpsw_ss: vm_map_phys failed");
}
lan8710a_state.regs_cpsw_wr =
(vir_bytes)vm_map_phys(SELF, (void *)CPSW_WR_BASE_ADR, 512);
if ((void *)lan8710a_state.regs_cpsw_wr == MAP_FAILED) {
panic("lan8710a_state.regs_cpsw_wr: vm_map_phys failed");
}
lan8710a_state.regs_ctrl_mod =
(vir_bytes)vm_map_phys(SELF, (void *)CTRL_MOD_BASE_ADR, 2560);
if ((void *)lan8710a_state.regs_ctrl_mod == MAP_FAILED) {
panic("lan8710a_state.regs_ctrl_mod: vm_map_phys failed");
}
lan8710a_state.regs_intc =
(vir_bytes)vm_map_phys(SELF, (void *)INTC_BASE_ADR, 512);
if ((void *)lan8710a_state.regs_intc == MAP_FAILED) {
panic("lan8710a_state.regs_intc: vm_map_phys failed");
}
lan8710a_state.regs_mdio =
(vir_bytes)vm_map_phys(SELF, (void *)MDIO_BASE_ADDR, 512);
if ((void *)lan8710a_state.regs_mdio == MAP_FAILED) {
panic("lan8710a_state.regs_mdio: vm_map_phys failed");
}
mr.mr_base = BEGINNING_DESC_MEM;
mr.mr_limit = BEGINNING_DESC_MEM + DESC_MEMORY_LIMIT;
if (sys_privctl(SELF, SYS_PRIV_ADD_MEM, &mr) != 0) {
panic("Unable to request permission to map memory");
}
lan8710a_state.rx_desc_phy = BEGINNING_RX_DESC_MEM;
lan8710a_state.tx_desc_phy = BEGINNING_TX_DESC_MEM;
lan8710a_state.rx_desc = (lan8710a_desc_t *)vm_map_phys(SELF,
(void *)lan8710a_state.rx_desc_phy, 1024);
if ((void *)lan8710a_state.rx_desc == MAP_FAILED) {
panic("lan8710a_state.rx_desc: vm_map_phys failed");
}
lan8710a_state.tx_desc = (lan8710a_desc_t *)vm_map_phys(SELF,
(void *)lan8710a_state.tx_desc_phy, 1024);
if ((void *)lan8710a_state.tx_desc == MAP_FAILED) {
panic("lan8710a_state.tx_desc: vm_map_phys failed");
}
mr.mr_base = CPSW_STATS_BASE_ADR;
mr.mr_limit = CPSW_STATS_BASE_ADR + CPSW_STATS_MEM_LIMIT;
if (sys_privctl(SELF, SYS_PRIV_ADD_MEM, &mr) != 0) {
panic("Unable to request permission to map memory");
}
lan8710a_state.regs_cpsw_stats =
(vir_bytes)vm_map_phys(SELF, (void *)CPSW_STATS_BASE_ADR, 256);
if ((void *)lan8710a_state.regs_cpsw_stats == MAP_FAILED) {
panic("lan8710a_state.regs_cpsw_stats: vm_map_phys failed");
}
}
/*============================================================================*
* lan8710a_getstat *
*============================================================================*/
static void
lan8710a_getstat(mp)
message *mp;
{
int r;
eth_stat_t stats;
stats.ets_recvErr = lan8710a_reg_read(CPSW_STAT_RX_CRC_ERR)
+ lan8710a_reg_read(CPSW_STAT_RX_AGNCD_ERR)
+ lan8710a_reg_read(CPSW_STAT_RX_OVERSIZE);
stats.ets_sendErr = 0;
stats.ets_OVW = 0;
stats.ets_CRCerr = lan8710a_reg_read(CPSW_STAT_RX_CRC_ERR);
stats.ets_frameAll = lan8710a_reg_read(CPSW_STAT_RX_AGNCD_ERR);
stats.ets_missedP = 0;
stats.ets_packetR = lan8710a_reg_read(CPSW_STAT_RX_GOOD);
stats.ets_packetT = lan8710a_reg_read(CPSW_STAT_TX_GOOD);
stats.ets_collision = lan8710a_reg_read(CPSW_STAT_COLLISIONS);
stats.ets_transAb = 0;
stats.ets_carrSense = lan8710a_reg_read(CPSW_STAT_CARR_SENS_ERR);
stats.ets_fifoUnder = lan8710a_reg_read(CPSW_STAT_TX_UNDERRUN);
stats.ets_fifoOver = lan8710a_reg_read(CPSW_STAT_RX_OVERRUN);
stats.ets_CDheartbeat = 0;
stats.ets_OWC = 0;
sys_safecopyto(mp->m_source, mp->m_net_netdrv_dl_getstat_s.grant, 0,
(vir_bytes)&stats, sizeof(stats));
mp->m_type = DL_STAT_REPLY;
if ((r=ipc_send(mp->m_source, mp)) != OK) {
panic("lan8710a_getstat: ipc_send() failed: %d", r);
}
}
/*============================================================================*
* lan8710a_stop *
*============================================================================*/
static void
lan8710a_stop(void)
{
/* Reset hardware. */
lan8710a_reset_hw();
/* Exit driver. */
exit(EXIT_SUCCESS);
}
/*============================================================================*
* lan8710a_dma_config_tx *
*============================================================================*/
static void
lan8710a_dma_config_tx(desc_idx)
u8_t desc_idx;
{
phys_bytes phys_addr;
int i;
for (i = 0; i < TX_DMA_CHANNELS; ++i) {
if (!lan8710a_reg_read(CPDMA_STRAM_TX_HDP(i))) break;
}
if (i == TX_DMA_CHANNELS) {
panic("There are no free TX DMA channels.");
}
/* Enabling only one channel Tx interrupt */
lan8710a_reg_write(CPDMA_TX_INTMASK_SET, 1 << i);
/* Routing only one channel Tx int to TX_PULSE signal */
lan8710a_reg_write(CPSW_WR_C0_TX_EN, 1 << i);
/* Setting HDP */
phys_addr = lan8710a_state.tx_desc_phy +
(desc_idx * sizeof(lan8710a_desc_t));
lan8710a_reg_write(CPDMA_STRAM_TX_HDP(i), (u32_t)phys_addr);
}
/*============================================================================*
* lan8710a_dma_reset_init *
*============================================================================*/
static void
lan8710a_dma_reset_init(void)
{
int i;
lan8710a_reg_write(CPDMA_SOFT_RESET, SOFT_RESET);
while ((lan8710a_reg_read(CPDMA_SOFT_RESET) & SOFT_RESET));
/*
* Initialize the HDPs (Header Description Pointers) and
* CPs (Completion Pointers) to NULL.
*/
for (i = 0; i < DMA_MAX_CHANNELS; ++i) {
lan8710a_reg_write(CPDMA_STRAM_TX_HDP(i), 0);
lan8710a_reg_write(CPDMA_STRAM_RX_HDP(i), 0);
lan8710a_reg_write(CPDMA_STRAM_TX_CP(i), 0);
lan8710a_reg_write(CPDMA_STRAM_RX_CP(i), 0);
}
lan8710a_reg_write(CPDMA_RX_INTMASK_CLEAR, 0xFFFFFFFF);
lan8710a_reg_write(CPDMA_TX_INTMASK_CLEAR, 0xFFFFFFFF);
/* Configure the CPDMA controller. */
lan8710a_reg_set(CPDMA_RX_CONTROL, CPDMA_RX_EN); /* RX Enabled */
lan8710a_reg_set(CPDMA_TX_CONTROL, CPDMA_TX_EN); /* TX Enabled */
/* Enabling first channel Rx interrupt */
lan8710a_reg_set(CPDMA_RX_INTMASK_SET, CPDMA_FIRST_CHAN_INT);
/*
* Writing the address of the first buffer descriptor in the queue
* (nonzero value)to the channel<65>s head descriptor pointer in the
* channel<65>s Rx DMA state.
*/
lan8710a_reg_write(CPDMA_STRAM_RX_HDP(0),
(u32_t)lan8710a_state.rx_desc_phy);
lan8710a_state.rx_desc_idx = 0;
lan8710a_state.tx_desc_idx = 0;
}
/*============================================================================*
* lan8710a_init_desc *
*============================================================================*/
static void
lan8710a_init_desc(void)
{
lan8710a_desc_t *p_rx_desc;
lan8710a_desc_t *p_tx_desc;
phys_bytes buf_phys_addr;
u8_t *p_buf;
u8_t i;
/* Attempt to allocate. */
if ((lan8710a_state.p_rx_buf = alloc_contig((LAN8710A_NUM_RX_DESC
* LAN8710A_IOBUF_SIZE), AC_ALIGN4K,
&buf_phys_addr)) == NULL) {
panic("failed to allocate RX buffers.");
}
p_buf = lan8710a_state.p_rx_buf;
for (i = 0; i < LAN8710A_NUM_RX_DESC; i++) {
p_rx_desc = &(lan8710a_state.rx_desc[i]);
memset(p_rx_desc, 0x0, sizeof(lan8710a_desc_t));
p_rx_desc->pkt_len_flags = LAN8710A_DESC_FLAG_OWN;
p_rx_desc->buffer_length_off = LAN8710A_IOBUF_SIZE;
p_rx_desc->buffer_pointer = (u32_t)(buf_phys_addr +
(i * LAN8710A_IOBUF_SIZE));
p_rx_desc->next_pointer =
(u32_t)((i == (LAN8710A_NUM_RX_DESC - 1)) ?
(lan8710a_state.rx_desc_phy) :
(lan8710a_state.rx_desc_phy +
((i + 1) * sizeof(lan8710a_desc_t))));
}
/* Attempt to allocate. */
if ((lan8710a_state.p_tx_buf = alloc_contig((LAN8710A_NUM_TX_DESC
* LAN8710A_IOBUF_SIZE), AC_ALIGN4K,
&buf_phys_addr)) == NULL) {
panic("failed to allocate TX buffers");
}
p_buf = lan8710a_state.p_tx_buf;
for (i = 0; i < LAN8710A_NUM_TX_DESC; i++) {
p_tx_desc = &(lan8710a_state.tx_desc[i]);
memset(p_tx_desc, 0x0, sizeof(lan8710a_desc_t));
p_tx_desc->buffer_pointer = (u32_t)(buf_phys_addr +
(i * LAN8710A_IOBUF_SIZE));
}
lan8710a_state.rx_desc_idx = 0;
lan8710a_state.tx_desc_idx = 0;
}
/*============================================================================*
* lan8710a_init_hw *
*============================================================================*/
static int
lan8710a_init_hw(void)
{
int r, i;
lan8710a_state.status |= LAN8710A_ENABLED;
/*
* Set the interrupt handler and policy. Do not automatically
* re-enable interrupts. Return the IRQ line number on interrupts.
*/
lan8710a_state.irq_rx_hook = RX_INT;
if ((r = sys_irqsetpolicy(LAN8710A_RX_INTR, 0,
&lan8710a_state.irq_rx_hook)) != OK) {
panic("sys_irqsetpolicy failed: %d", r);
}
lan8710a_state.irq_tx_hook = TX_INT;
if ((r = sys_irqsetpolicy(LAN8710A_TX_INTR, 0,
&lan8710a_state.irq_tx_hook)) != OK) {
panic("sys_irqsetpolicy failed: %d", r);
}
/* Reset hardware. */
lan8710a_reset_hw();
/*
* Select the Interface (GMII/RGMII/MII) Mode in the Control Module.
* Port1 GMII/MII Mode, Port2 not used.
*/
lan8710a_reg_write(GMII_SEL, (GMII2_SEL_BIT1 | GMII2_SEL_BIT0));
/*
* Configure pads (PIN muxing) as per the Interface Selected using the
* appropriate pin muxing conf_xxx registers in the Control Module.
*
* CONF_MOD_SLEW_CTRL when 0 - Fast Mode, when 1 - Slow Mode
* CONF_MOD_RX_ACTIVE when 0 - Only output, when 1 - Also input
* CONF_MOD_PU_TYPESEL when 0 - Pull-down, when 1 - Pull-up
* CONF_MOD_PUDEN when 0 Pull* enabled, when 1 Pull* disabled
* CONF_MOD_MMODE_MII selects pin to work for MII interface
*/
lan8710a_reg_unset(CONF_MII1_COL, CONF_MOD_SLEW_CTRL);
lan8710a_reg_set(CONF_MII1_COL, CONF_MOD_RX_ACTIVE);
lan8710a_reg_set(CONF_MII1_COL, CONF_MOD_PU_TYPESEL);
lan8710a_reg_unset(CONF_MII1_COL, CONF_MOD_PUDEN);
lan8710a_reg_unset(CONF_MII1_COL, CONF_MOD_MMODE_MII);
lan8710a_reg_unset(CONF_MII1_CRS, CONF_MOD_SLEW_CTRL);
lan8710a_reg_set(CONF_MII1_CRS, CONF_MOD_RX_ACTIVE);
lan8710a_reg_set(CONF_MII1_CRS, CONF_MOD_PU_TYPESEL);
lan8710a_reg_unset(CONF_MII1_CRS, CONF_MOD_PUDEN);
lan8710a_reg_unset(CONF_MII1_CRS, CONF_MOD_MMODE_MII);
lan8710a_reg_unset(CONF_MII1_RX_ER, CONF_MOD_SLEW_CTRL);
lan8710a_reg_set(CONF_MII1_RX_ER, CONF_MOD_RX_ACTIVE);
lan8710a_reg_set(CONF_MII1_RX_ER, CONF_MOD_PU_TYPESEL);
lan8710a_reg_unset(CONF_MII1_RX_ER, CONF_MOD_PUDEN);
lan8710a_reg_unset(CONF_MII1_RX_ER, CONF_MOD_MMODE_MII);
lan8710a_reg_unset(CONF_MII1_TX_EN, CONF_MOD_SLEW_CTRL);
lan8710a_reg_unset(CONF_MII1_TX_EN, CONF_MOD_RX_ACTIVE);
lan8710a_reg_set(CONF_MII1_TX_EN, CONF_MOD_PUDEN);
lan8710a_reg_unset(CONF_MII1_TX_EN, CONF_MOD_MMODE_MII);
lan8710a_reg_unset(CONF_MII1_RX_DV, CONF_MOD_SLEW_CTRL);
lan8710a_reg_set(CONF_MII1_RX_DV, CONF_MOD_RX_ACTIVE);
lan8710a_reg_set(CONF_MII1_RX_DV, CONF_MOD_PU_TYPESEL);
lan8710a_reg_unset(CONF_MII1_RX_DV, CONF_MOD_PUDEN);
lan8710a_reg_unset(CONF_MII1_RX_DV, CONF_MOD_MMODE_MII);
lan8710a_reg_unset(CONF_MII1_TXD3, CONF_MOD_SLEW_CTRL);
lan8710a_reg_unset(CONF_MII1_TXD3, CONF_MOD_RX_ACTIVE);
lan8710a_reg_set(CONF_MII1_TXD3, CONF_MOD_PUDEN);
lan8710a_reg_unset(CONF_MII1_TXD3, CONF_MOD_MMODE_MII);
lan8710a_reg_unset(CONF_MII1_TXD2, CONF_MOD_SLEW_CTRL);
lan8710a_reg_unset(CONF_MII1_TXD2, CONF_MOD_RX_ACTIVE);
lan8710a_reg_set(CONF_MII1_TXD2, CONF_MOD_PUDEN);
lan8710a_reg_unset(CONF_MII1_TXD2, CONF_MOD_MMODE_MII);
lan8710a_reg_unset(CONF_MII1_TXD1, CONF_MOD_SLEW_CTRL);
lan8710a_reg_unset(CONF_MII1_TXD1, CONF_MOD_RX_ACTIVE);
lan8710a_reg_set(CONF_MII1_TXD1, CONF_MOD_PUDEN);
lan8710a_reg_unset(CONF_MII1_TXD1, CONF_MOD_MMODE_MII);
lan8710a_reg_unset(CONF_MII1_TXD0, CONF_MOD_SLEW_CTRL);
lan8710a_reg_unset(CONF_MII1_TXD0, CONF_MOD_RX_ACTIVE);
lan8710a_reg_set(CONF_MII1_TXD0, CONF_MOD_PUDEN);
lan8710a_reg_unset(CONF_MII1_TXD0, CONF_MOD_MMODE_MII);
lan8710a_reg_unset(CONF_MII1_TX_CLK, CONF_MOD_SLEW_CTRL);
lan8710a_reg_set(CONF_MII1_TX_CLK, CONF_MOD_RX_ACTIVE);
lan8710a_reg_set(CONF_MII1_TX_CLK, CONF_MOD_PUDEN);
lan8710a_reg_unset(CONF_MII1_TX_CLK, CONF_MOD_MMODE_MII);
lan8710a_reg_unset(CONF_MII1_RX_CLK, CONF_MOD_SLEW_CTRL);
lan8710a_reg_set(CONF_MII1_RX_CLK, CONF_MOD_RX_ACTIVE);
lan8710a_reg_set(CONF_MII1_RX_CLK, CONF_MOD_PUDEN);
lan8710a_reg_unset(CONF_MII1_RX_CLK, CONF_MOD_MMODE_MII);
lan8710a_reg_unset(CONF_MII1_RXD3, CONF_MOD_SLEW_CTRL);
lan8710a_reg_set(CONF_MII1_RXD3, CONF_MOD_RX_ACTIVE);
lan8710a_reg_set(CONF_MII1_RXD3, CONF_MOD_PU_TYPESEL);
lan8710a_reg_unset(CONF_MII1_RXD3, CONF_MOD_PUDEN);
lan8710a_reg_unset(CONF_MII1_RXD3, CONF_MOD_MMODE_MII);
lan8710a_reg_unset(CONF_MII1_RXD2, CONF_MOD_SLEW_CTRL);
lan8710a_reg_set(CONF_MII1_RXD2, CONF_MOD_RX_ACTIVE);
lan8710a_reg_set(CONF_MII1_RXD2, CONF_MOD_PU_TYPESEL);
lan8710a_reg_unset(CONF_MII1_RXD2, CONF_MOD_PUDEN);
lan8710a_reg_unset(CONF_MII1_RXD2, CONF_MOD_MMODE_MII);
lan8710a_reg_unset(CONF_MII1_RXD1, CONF_MOD_SLEW_CTRL);
lan8710a_reg_set(CONF_MII1_RXD1, CONF_MOD_RX_ACTIVE);
lan8710a_reg_set(CONF_MII1_RXD1, CONF_MOD_PU_TYPESEL);
lan8710a_reg_unset(CONF_MII1_RXD1, CONF_MOD_PUDEN);
lan8710a_reg_unset(CONF_MII1_RXD1, CONF_MOD_MMODE_MII);
lan8710a_reg_unset(CONF_MII1_RXD0, CONF_MOD_SLEW_CTRL);
lan8710a_reg_set(CONF_MII1_RXD0, CONF_MOD_RX_ACTIVE);
lan8710a_reg_set(CONF_MII1_RXD0, CONF_MOD_PU_TYPESEL);
lan8710a_reg_unset(CONF_MII1_RXD0, CONF_MOD_PUDEN);
lan8710a_reg_unset(CONF_MII1_RXD0, CONF_MOD_MMODE_MII);
lan8710a_reg_unset(CONF_MDIO, CONF_MOD_SLEW_CTRL);
lan8710a_reg_set(CONF_MDIO, CONF_MOD_RX_ACTIVE);
lan8710a_reg_set(CONF_MDIO, CONF_MOD_PU_TYPESEL);
lan8710a_reg_unset(CONF_MDIO, CONF_MOD_PUDEN);
lan8710a_reg_unset(CONF_MDIO, CONF_MOD_MMODE_MII);
lan8710a_reg_unset(CONF_MDC, CONF_MOD_SLEW_CTRL);
lan8710a_reg_unset(CONF_MDC, CONF_MOD_RX_ACTIVE);
lan8710a_reg_set(CONF_MDC, CONF_MOD_PUDEN);
lan8710a_reg_unset(CONF_MDC, CONF_MOD_MMODE_MII);
/* Apply soft reset to 3PSW Subsytem, CPSW_3G, CPGMAC_SL, and CPDMA. */
lan8710a_reg_write(CPSW_SS_SOFT_RESET, SOFT_RESET);
lan8710a_reg_write(CPSW_SL_SOFT_RESET(1), SOFT_RESET);
lan8710a_reg_write(CPSW_SL_SOFT_RESET(2), SOFT_RESET);
/* Wait for software resets completion */
while ((lan8710a_reg_read(CPSW_SS_SOFT_RESET) & SOFT_RESET) ||
(lan8710a_reg_read(CPSW_SL_SOFT_RESET(1)) & SOFT_RESET) ||
(lan8710a_reg_read(CPSW_SL_SOFT_RESET(2)) & SOFT_RESET));
/* Configure the Statistics Port Enable register. */
/* Enable port 0 and 1 statistics. */
lan8710a_reg_write(CPSW_SS_STAT_PORT_EN, (CPSW_P1_STAT_EN |
CPSW_P0_STAT_EN));
/*
* Configure the ALE.
* Enabling Ale.
* All packets received on ports 1 are
* sent to the host (only to the host).
*/
lan8710a_reg_write(CPSW_ALE_CONTROL, (CPSW_ALE_ENABLE |
CPSW_ALE_BYPASS));
/* Port 0 (host) in forwarding mode. */
lan8710a_reg_write(CPSW_ALE_PORTCTL0, CPSW_ALE_PORT_FWD);
/* Port 1 in forwarding mode. */
lan8710a_reg_write(CPSW_ALE_PORTCTL1, CPSW_ALE_PORT_FWD);
/*
* Configure CPSW_SL Register
* Full duplex mode.
*/
lan8710a_reg_write(CPSW_SL_MACCONTROL(1), CPSW_SL_FULLDUPLEX);
/* Initialize MDIO Protocol */
lan8710a_init_mdio();
/* Getting MAC Address */
lan8710a_init_addr();
/* Initialize descriptors */
lan8710a_init_desc();
/* Reset and initialize CPDMA */
lan8710a_dma_reset_init();
/*
* Configure the Interrupts.
* Routing all channel Rx int to RX_PULSE signal.
*/
lan8710a_reg_set(CPSW_WR_C0_RX_EN, CPSW_FIRST_CHAN_INT);
/*
* Enabling LAN8710A Auto-negotiation
*/
lan8710a_phy_write(LAN8710A_CTRL_REG, LAN8710A_AUTO_NEG);
/* Waiting for auto-negotiaion completion. */
for (i = 0; !(lan8710a_phy_read(LAN8710A_STATUS_REG) &
LAN8710A_AUTO_NEG_COMPL); ++i) {
if (i == 100) {
LAN8710A_DEBUG_PRINT(("Autonegotiation failed"));
break;
}
tickdelay(100);
}
/* GMII RX and TX release from reset. */
lan8710a_reg_set(CPSW_SL_MACCONTROL(1), CPSW_SL_GMII_EN);
/* Enable interrupts. */
lan8710a_enable_interrupt(RX_INT | TX_INT);
return TRUE;
}
/*============================================================================*
* lan8710a_init_mdio *
*============================================================================*/
static void
lan8710a_init_mdio(void)
{
u16_t address = 0;
u32_t r;
/* Clearing MDIOCONTROL register */
lan8710a_reg_write(MDIOCONTROL, 0);
/* Configure the PREAMBLE and CLKDIV in the MDIO control register */
lan8710a_reg_unset(MDIOCONTROL, MDIO_PREAMBLE); /* CLKDIV default */
/* Enable sending MDIO frame preambles */
lan8710a_reg_set(MDIOCONTROL, (MDCLK_DIVIDER | MDIO_ENABLE));
/* Enable the MDIO module by setting the ENABLE bit in MDIOCONTROL */
while (!(r = lan8710a_reg_read(MDIOALIVE)));
/* Get PHY address */
while (r >>= 1) {
++address;
}
lan8710a_state.phy_address = address;
/* Setup appropiate address in MDIOUSERPHYSEL0 */
lan8710a_reg_set(MDIOUSERPHYSEL0, address);
}
/*============================================================================*
* lan8710a_writev_s *
*============================================================================*/
static void
lan8710a_writev_s(mp, from_int)
message *mp;
int from_int;
{
iovec_s_t iovec[LAN8710A_IOVEC_NR];
lan8710a_t *e = &lan8710a_state;
lan8710a_desc_t *p_tx_desc;
u8_t *p_buf;
int r, size, buf_data_len, i;
/* Are we called from the interrupt handler? */
if (!from_int) {
/* We cannot write twice simultaneously. */
assert(!(e->status & LAN8710A_WRITING));
/* Copy write message. */
e->tx_message = *mp;
e->client = mp->m_source;
e->status |= LAN8710A_WRITING;
/* verify vector count */
assert(mp->m_net_netdrv_dl_writev_s.count > 0);
assert(mp->m_net_netdrv_dl_writev_s.count < LAN8710A_IOVEC_NR);
/*
* Copy the I/O vector table.
*/
if ((r = sys_safecopyfrom(mp->m_source,
mp->m_net_netdrv_dl_writev_s.grant, 0,
(vir_bytes) iovec,
mp->m_net_netdrv_dl_writev_s.count *
sizeof(iovec_s_t))) != OK) {
panic("sys_safecopyfrom() failed: %d", r);
}
/* setup descriptors */
p_tx_desc = &(e->tx_desc[e->tx_desc_idx]);
/*
* Check if descriptor is available for host
* and drop the packet if not.
*/
if (LAN8710A_DESC_FLAG_OWN & p_tx_desc->pkt_len_flags) {
panic("No available transmit descriptor.");
}
/* virtual address of buffer */
p_buf = e->p_tx_buf + e->tx_desc_idx * LAN8710A_IOBUF_SIZE;
buf_data_len = 0;
for (i = 0; i < mp->m_net_netdrv_dl_writev_s.count; i++) {
if ((buf_data_len + iovec[i].iov_size)
> LAN8710A_IOBUF_SIZE) {
panic("packet too long");
}
/* copy data to buffer */
size = iovec[i].iov_size
< (LAN8710A_IOBUF_SIZE - buf_data_len) ?
iovec[i].iov_size
: (LAN8710A_IOBUF_SIZE - buf_data_len);
/* Copy bytes to TX queue buffers. */
if ((r = sys_safecopyfrom(mp->m_source,
iovec[i].iov_grant, 0,
(vir_bytes) p_buf, size)) != OK) {
panic("sys_safecopyfrom() failed: %d", r);
}
p_buf += size;
buf_data_len += size;
}
/* set descriptor length */
p_tx_desc->buffer_length_off = buf_data_len;
/* set flags */
p_tx_desc->pkt_len_flags = (LAN8710A_DESC_FLAG_OWN |
LAN8710A_DESC_FLAG_SOP |
LAN8710A_DESC_FLAG_EOP |
TX_DESC_TO_PORT1 |
TX_DESC_TO_PORT_EN);
p_tx_desc->pkt_len_flags |= buf_data_len;
/* setup DMA transfer */
lan8710a_dma_config_tx(e->tx_desc_idx);
e->tx_desc_idx++;
if (LAN8710A_NUM_TX_DESC == e->tx_desc_idx) {
e->tx_desc_idx = 0;
}
} else {
e->status |= LAN8710A_TRANSMIT;
}
reply(e);
}
/*============================================================================*
* lan8710a_readv_s *
*============================================================================*/
static void
lan8710a_readv_s(mp, from_int)
message *mp;
int from_int;
{
iovec_s_t iovec[LAN8710A_IOVEC_NR];
lan8710a_t *e = &lan8710a_state;
lan8710a_desc_t *p_rx_desc;
u32_t flags;
u8_t *p_buf;
u16_t pkt_data_len;
u16_t buf_bytes, buf_len;
int i, r, size;
/* Are we called from the interrupt handler? */
if (!from_int) {
e->rx_message = *mp;
e->client = mp->m_source;
e->status |= LAN8710A_READING;
e->rx_size = 0;
assert(e->rx_message.m_net_netdrv_dl_readv_s.count > 0);
assert(e->rx_message.m_net_netdrv_dl_readv_s.count < LAN8710A_IOVEC_NR);
}
if (e->status & LAN8710A_READING) {
/*
* Copy the I/O vector table first.
*/
if ((r = sys_safecopyfrom(e->rx_message.m_source,
e->rx_message.m_net_netdrv_dl_readv_s.grant, 0,
(vir_bytes) iovec,
e->rx_message.m_net_netdrv_dl_readv_s.count *
sizeof(iovec_s_t))) != OK) {
panic("sys_safecopyfrom() failed: %d", r);
}
/*
* Only handle one packet at a time.
*/
p_rx_desc = &(e->rx_desc[e->rx_desc_idx]);
/* find next OWN descriptor with SOP flag */
while ((0 == (LAN8710A_DESC_FLAG_SOP &
p_rx_desc->pkt_len_flags)) &&
(0 == (LAN8710A_DESC_FLAG_OWN &
p_rx_desc->pkt_len_flags))) {
p_rx_desc->buffer_length_off = LAN8710A_IOBUF_SIZE;
/* set ownership of current descriptor to EMAC */
p_rx_desc->pkt_len_flags = LAN8710A_DESC_FLAG_OWN;
e->rx_desc_idx++;
if (LAN8710A_NUM_RX_DESC == e->rx_desc_idx)
e->rx_desc_idx = 0;
p_rx_desc = &(e->rx_desc[e->rx_desc_idx]);
}
if (0 == (LAN8710A_DESC_FLAG_SOP & p_rx_desc->pkt_len_flags)) {
/* SOP was not found */
reply(e);
return;
}
/*
* Copy to vector elements.
*/
pkt_data_len = 0;
buf_bytes = 0;
p_buf = e->p_rx_buf + e->rx_desc_idx * LAN8710A_IOBUF_SIZE;
for (i = 0; i < e->rx_message.m_net_netdrv_dl_readv_s.count; i++) {
buf_len = p_rx_desc->buffer_length_off & 0xFFFF;
if (buf_bytes == buf_len) {
/* Whole buffer move to the next descriptor */
p_rx_desc->buffer_length_off =
LAN8710A_IOBUF_SIZE;
/* set ownership of current desc to EMAC */
p_rx_desc->pkt_len_flags =
LAN8710A_DESC_FLAG_OWN;
buf_bytes = 0;
e->rx_desc_idx++;
if (LAN8710A_NUM_RX_DESC == e->rx_desc_idx)
e->rx_desc_idx = 0;
p_rx_desc = &(e->rx_desc[e->rx_desc_idx]);
p_buf = e->p_rx_buf + (e->rx_desc_idx *
LAN8710A_IOBUF_SIZE) +
(p_rx_desc->buffer_length_off >> 16);
buf_len = p_rx_desc->buffer_length_off & 0xFFFF;
}
size = iovec[i].iov_size < (buf_len - buf_bytes) ?
iovec[i].iov_size :
(buf_len - buf_bytes);
if ((r = sys_safecopyto(e->rx_message.m_source,
iovec[i].iov_grant, 0,
(vir_bytes) p_buf,
size)) != OK) {
panic("sys_safecopyto() failed: %d", r);
}
p_buf += size;
buf_bytes += size;
pkt_data_len += size;
/* if EOP flag is set -> stop processing */
if ((LAN8710A_DESC_FLAG_EOP & p_rx_desc->pkt_len_flags) &&
(buf_bytes == buf_len)) {
/* end of packet */
break;
}
}
do {
/* reset owned descriptors up to EOP flag */
flags = p_rx_desc->pkt_len_flags;
p_rx_desc->buffer_length_off = LAN8710A_IOBUF_SIZE;
/* set ownership of current descriptor to EMAC */
p_rx_desc->pkt_len_flags = LAN8710A_DESC_FLAG_OWN;
e->rx_desc_idx++;
if (LAN8710A_NUM_RX_DESC == e->rx_desc_idx)
e->rx_desc_idx = 0;
p_rx_desc = &(e->rx_desc[e->rx_desc_idx]);
}
while (0 == (flags & LAN8710A_DESC_FLAG_EOP));
/*
* Update state.
*/
e->status |= LAN8710A_RECEIVED;
e->rx_size = pkt_data_len;
}
reply(e);
}
/*============================================================================*
* lan8710a_phy_write *
*============================================================================*/
static void
lan8710a_phy_write(reg, value)
u32_t reg;
u32_t value;
{
if (!(lan8710a_reg_read(MDIOUSERACCESS0) & MDIO_GO)) {
/* Clearing MDIOUSERACCESS0 register */
lan8710a_reg_write(MDIOUSERACCESS0, 0);
/* Setting proper values in MDIOUSERACCESS0 */
lan8710a_reg_set(MDIOUSERACCESS0, MDIO_WRITE);
lan8710a_reg_set(MDIOUSERACCESS0, reg << MDIO_REGADR);
lan8710a_reg_set(MDIOUSERACCESS0,
lan8710a_state.phy_address << MDIO_PHYADR);
/* Data written only 16 bits. */
lan8710a_reg_set(MDIOUSERACCESS0, (value & 0xFFFF) << MDIO_DATA);
lan8710a_reg_set(MDIOUSERACCESS0, MDIO_GO);
/* Waiting for writing completion */
while (lan8710a_reg_read(MDIOUSERACCESS0) & MDIO_GO);
}
}
/*============================================================================*
* lan8710a_phy_read *
*============================================================================*/
static u32_t
lan8710a_phy_read(reg)
u32_t reg;
{
u32_t value = 0xFFFFFFFF;
if (!(lan8710a_reg_read(MDIOUSERACCESS0) & MDIO_GO)) {
/* Clearing MDIOUSERACCESS0 register */
lan8710a_reg_write(MDIOUSERACCESS0, 0);
/* Setting proper values in MDIOUSERACCESS0 */
lan8710a_reg_unset(MDIOUSERACCESS0, MDIO_WRITE);
/* Reg number must be 5 bit long */
lan8710a_reg_set(MDIOUSERACCESS0, (reg & 0x1F) << MDIO_REGADR);
/* Addr must be 5 bit long */
lan8710a_reg_set(MDIOUSERACCESS0,
(lan8710a_state.phy_address & 0x1F) << MDIO_PHYADR);
lan8710a_reg_set(MDIOUSERACCESS0, MDIO_GO);
/* Waiting for reading completion */
while ((lan8710a_reg_read(MDIOUSERACCESS0) & MDIO_GO)
&& !(lan8710a_reg_read(MDIOUSERACCESS0) & MDIO_ACK));
/* Reading data */
value = lan8710a_reg_read(MDIOUSERACCESS0) & 0xFFFF;
}
return value;
}
/*============================================================================*
* lan8710a_reset_hw *
*============================================================================*/
static void
lan8710a_reset_hw()
{
/* Assert a Device Reset signal. */
lan8710a_phy_write(LAN8710A_CTRL_REG, LAN8710A_SOFT_RESET);
/* Waiting for reset completion. */
while (lan8710a_phy_read(LAN8710A_CTRL_REG) & LAN8710A_SOFT_RESET);
}
/*============================================================================*
* lan8710a_reg_read *
*============================================================================*/
static u32_t
lan8710a_reg_read(reg)
volatile u32_t *reg;
{
u32_t value;
/* Read from memory mapped register. */
value = *reg;
/* Return the result. */
return value;
}
/*============================================================================*
* lan8710a_reg_write *
*============================================================================*/
static void
lan8710a_reg_write(reg, value)
volatile u32_t *reg;
u32_t value;
{
/* Write to memory mapped register. */
*reg = value;
}
/*============================================================================*
* lan8710a_reg_set *
*============================================================================*/
static void
lan8710a_reg_set(reg, value)
volatile u32_t *reg;
u32_t value;
{
u32_t data;
/* First read the current value. */
data = lan8710a_reg_read(reg);
/* Set value, and write back. */
lan8710a_reg_write(reg, data | value);
}
/*============================================================================*
* lan8710a_reg_unset *
*============================================================================*/
static void
lan8710a_reg_unset(reg, value)
volatile u32_t *reg;
u32_t value;
{
u32_t data;
/* First read the current value. */
data = lan8710a_reg_read(reg);
/* Unset value, and write back. */
lan8710a_reg_write(reg, data & ~value);
}
/*============================================================================*
* mess_reply *
*============================================================================*/
static void
mess_reply(req, reply)
message *req;message *reply;
{
if (ipc_send(req->m_source, reply) != OK) {
panic("unable to send reply message");
}
}
/*============================================================================*
* reply *
*============================================================================*/
static void
reply(e)
lan8710a_t *e;
{
message msg;
int r;
/* Only reply to client for read/write request. */
if (!(e->status & LAN8710A_READING ||
e->status & LAN8710A_WRITING)) {
return;
}
/* Construct reply message. */
msg.m_type = DL_TASK_REPLY;
msg.m_netdrv_net_dl_task.flags = DL_NOFLAGS;
msg.m_netdrv_net_dl_task.count = 0;
/* Did we successfully receive packet(s)? */
if (e->status & LAN8710A_READING &&
e->status & LAN8710A_RECEIVED) {
msg.m_netdrv_net_dl_task.flags |= DL_PACK_RECV;
msg.m_netdrv_net_dl_task.count =
e->rx_size >= ETH_MIN_PACK_SIZE ?
e->rx_size : ETH_MIN_PACK_SIZE;
/* Clear flags. */
e->status &= ~(LAN8710A_READING | LAN8710A_RECEIVED);
}
/* Did we successfully transmit packet(s)? */
if (e->status & LAN8710A_TRANSMIT &&
e->status & LAN8710A_WRITING) {
msg.m_netdrv_net_dl_task.flags |= DL_PACK_SEND;
/* Clear flags. */
e->status &= ~(LAN8710A_WRITING | LAN8710A_TRANSMIT);
}
/* Acknowledge to INET. */
if ((r = ipc_send(e->client, &msg) != OK)) {
panic("ipc_send() failed: %d", r);
}
}
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